bridge gantry crane
2014年1月22日星期三
Overhead crane parameter identification based on energy conservation
Two degrees of freedom of the bridge crane , due to the driving characteristics of a system input that transport overhead gantry crane the crane swing accompanied the load, which increases the difficulty to accurately position the load handling control . Around the bridge crane anti- sway control launched a lot of research . Presents a hierarchical sliding mode control method , the system state is divided into two groups were constructed sliding plane, control the amount of each sub- sliding surface contains the equivalent control component so as to ensure the system state of each sub- sliding along the slip plane . The establishment of a fuzzy control system, four-input single-output fuzzy controller is optimized for two pairs of input single-output fuzzy controller and a weighted composite of the two outputs. Prediction and compensation based on disturbance eot crane feedforward and feedback controller is designed to effectively eliminate the influence of nonlinear friction of the cable car system. However, numerous studies including the above literature , including both known to stay in the assumed model simulation stage , and no model parameter identification in-depth study . Mathematical models for controller design overhead crane is very important , so the controller based on a simple model structure obtained applications. Common method of system identification of an energy law and CAD models. Accuracy of the components illustrated AutoCAD CAD model method relies on the system , the process can not be accurate.
2013年9月8日星期日
China's " two sessions" on the issue of construction machinery sounds
On March 5 the government work report that: " China's manufacturing industry scale ranks first in the world , high-tech manufacturing value added average annual growth of 13.4 percent,bridge gantry crane becoming an important national leader and pillar industries ." But on a pillar industry - manufacturing the whole, there are several aspects of the current problems and deficiencies at the national development plan the next step progressively studied and resolved.
First, technology and capital investment slightly less , more a lack of high-end talent . Since innovation capability is weak, the lack of independent intellectual property rights , it is difficult occupied high-end chain .
Second, land , labor, capital, technology and other factors of production problems of environmental resources as a constraint structure adjustment and upgrade high-end manufacturing constraints .
Third, the high-end manufacturing industry overall is not extended , the design and development and other ancillary services can not keep up issues highlighted.
Fourth , financial services , industrial development project planning from the high-end manufacturing demand is still not a small distance.
However, a branch of the field of the manufacturing sector - construction eot crane industry, can be reassuring , in two sessions on a number of issues , the investment is still to promote economic development in the main event in 2013 . By new urbanization and infrastructure driven, followed by rail road , real estate, irrigation and water conservancy project started, is expected to usher in engineering machinery moderate recovery situation. Data show that in December 2012 , the country 's construction machinery industry total industrial output value 56,735,000,000 yuan , an increase of 11.39% , growth of 32.06% . " Urbanization " strategy proposed a nationwide infrastructure to stimulate the construction of a large number of investments, including railways, highways , bridges and so on. Infrastructure construction cycle is longer, the average period is 2-3 years, so in a long time , the application of engineering machinery market has been a certain guarantee , the industry's overall sales and revenues to maintain a certain level will be high.
Although the outlook is good, but as a potential threat to manufacturing , engineering machinery industry is also an urgent need to address a range of issues before they can be healthy and orderly development of the industry .
First, greater efforts to save energy manufacturing , low-carbon eco-friendly products
In the March 3, 2013 meeting at the second session of the CPPCC National Committee meeting, Comrade Jia Qinglin on behalf of the Eleventh CPPCC National Committee Standing Committee work report . Jia Qinglin focus mentioned, we must promote the functioning of ecological civilization construction as an important focal point, through research visits ,hoist gantry crane conferences and forums , information and other proposals continued advice and suggestions put forward to set national "five " binding energy consumption indicators positive recommendations , and get the CPC Central Committee and State Council attached great importance to and adoption .
First, technology and capital investment slightly less , more a lack of high-end talent . Since innovation capability is weak, the lack of independent intellectual property rights , it is difficult occupied high-end chain .
Second, land , labor, capital, technology and other factors of production problems of environmental resources as a constraint structure adjustment and upgrade high-end manufacturing constraints .
Third, the high-end manufacturing industry overall is not extended , the design and development and other ancillary services can not keep up issues highlighted.
Fourth , financial services , industrial development project planning from the high-end manufacturing demand is still not a small distance.
However, a branch of the field of the manufacturing sector - construction eot crane industry, can be reassuring , in two sessions on a number of issues , the investment is still to promote economic development in the main event in 2013 . By new urbanization and infrastructure driven, followed by rail road , real estate, irrigation and water conservancy project started, is expected to usher in engineering machinery moderate recovery situation. Data show that in December 2012 , the country 's construction machinery industry total industrial output value 56,735,000,000 yuan , an increase of 11.39% , growth of 32.06% . " Urbanization " strategy proposed a nationwide infrastructure to stimulate the construction of a large number of investments, including railways, highways , bridges and so on. Infrastructure construction cycle is longer, the average period is 2-3 years, so in a long time , the application of engineering machinery market has been a certain guarantee , the industry's overall sales and revenues to maintain a certain level will be high.
Although the outlook is good, but as a potential threat to manufacturing , engineering machinery industry is also an urgent need to address a range of issues before they can be healthy and orderly development of the industry .
First, greater efforts to save energy manufacturing , low-carbon eco-friendly products
In the March 3, 2013 meeting at the second session of the CPPCC National Committee meeting, Comrade Jia Qinglin on behalf of the Eleventh CPPCC National Committee Standing Committee work report . Jia Qinglin focus mentioned, we must promote the functioning of ecological civilization construction as an important focal point, through research visits ,hoist gantry crane conferences and forums , information and other proposals continued advice and suggestions put forward to set national "five " binding energy consumption indicators positive recommendations , and get the CPC Central Committee and State Council attached great importance to and adoption .
2013年9月6日星期五
Frequency converter in the crane electronic control system application
Introduction
Lifting industry using PLC- inverter gradually in recent years to promote and popularize , especially in large lifting equipment , with PLC program control to replace the traditional relay - contactor control ; replaced with a variable speed motor winding series resistance rotor speed ; asynchronous motor with inverter motor or replace the motor winding , coupled with advanced fieldbus technology and HMI system to improve the control accuracy and stability of the equipment , reduce the failure rate , and the energy-saving effect is remarkable , easy repair and maintenance , improve production efficiency to become a good way .
Control scheme
A large heavy machinery manufacturing plants, bears all the bulky equipment assembly , positioning, docking and other tasks, the overhead gantry crane high performance requirements , the use of an overhead crane used QD250/50t siemens S7-400 PLC, ABB inverter , touch screen and other high-performance configuration, application of advanced Profibus fieldbus technology , with encoder feedback direct torque control, and advanced human-machine interface system.
Divided into the main bridge crane hook, deputy hook , carts , trolleys and other four parts. Due to the main eot crane hoisting mechanism in most typical applications , control is also the most complex , so the main hoisting example in this chapter detailing its control.
1, PLC
The whole system S7-400 PLC as the core of electronic control , the main power supply module , CPU, input and output modules and interface modules and other components. Acquisition by a limit switch input modules , thermistors, inverter and other equipment fault feedback signal state ; receiving master controller , buttons, switches send control commands concentrated in the CPU operation and program operation result output module and Profibus fieldbus send contactors and inverters perform device to the drive motor , hydraulic brake , cooling fan and other complete various production tasks.
2, Profibus fieldbus system serial communication
Profibus is an open serial communication standard that enables data exchange between various automation components . In this system with S7-400 as the main station to the agencies as a slave drive by DP interface module and RS485 shielded twisted rapid real-time data exchange .
Set the inverter communication parameters :
98.02 = fieldbus communication module activation
51.01 = Profibus-DP field bus type selection
51.02 l = 3 to set the main inverter station address
51.03 = 1500 selected communications transmission rate of 1.5Mbit / s
51.04 = PPO4 select data type 4 ( 6 process data as a standard block )
As a master PLC CPU reads from the slave state of various input information, namely primary l read from the drive status word and actual values, including the drive is ready , power- response operation, the torque verification OK, inverter failure , the actual motor speed and other information ; and write information to a variety of output from the station , about the control word and speed reference written inverter. Including communications test position, from fieldbus PLC system Drive on, the start signal from the host system , fault reset signal and the actual frequency reference and so on. The complex signal conversion , monitoring, feedback process all data transmission via Profibus chain , and CPU quick focus easily .
3 , advanced man-machine interface system
TP270 touch screen and PLC Profibus bus is also used for data transmission and exchange , real-time display and monitor the operational status of the agencies and the voltage, current, torque, speed and other operating parameters , and can use its own real time fault diagnosis system Symptom judge , recording failure of various parameters , so that operators and maintenance personnel can fully understand the state of the system in a timely manner , and may prompt fault information to inspection and maintenance , to achieve accurate and fast troubleshooting effect , the real achieve a human intelligence .
4, the frequency control system
1 ) Lifting conditions and requirements
Hoisting mechanism requires a larger speed ratio and mechanical characteristics of hardness to suit the precise weight lifting requirements ; require a large starting torque ,bridge gantry crane excellent dynamic torque response ability to adapt to sudden load change , ensure that the heavy secondary lifting capacity ; must solve regenerative braking energy feedback and processing, in order to shorten the deceleration stopping time ; slide the hook must solve the problem .
2 ) conversion function application
According to the hoisting mechanism characteristics and technical requirements , the drive uses with a tachometer feedback interface 800 series drives, with ACC 7.2 Special upgrade software , form a closed loop direct torque control, through the pre-excitation function and starting torque setting , the motor starts instantaneous torque up to 300 %, achieved an excellent starting characteristics . built-in brake chopper , external braking resistor , braking process so that the generation of energy through regenerative braking resistor to be released , to achieve the purpose of rapid braking . Using a mechanical brake control function, so that the motor torque and brake release closely with better improve the safety of the equipment , the ability to withstand the impact of frequent starting and reliability also increased significantly .
Lifting industry using PLC- inverter gradually in recent years to promote and popularize , especially in large lifting equipment , with PLC program control to replace the traditional relay - contactor control ; replaced with a variable speed motor winding series resistance rotor speed ; asynchronous motor with inverter motor or replace the motor winding , coupled with advanced fieldbus technology and HMI system to improve the control accuracy and stability of the equipment , reduce the failure rate , and the energy-saving effect is remarkable , easy repair and maintenance , improve production efficiency to become a good way .
Control scheme
A large heavy machinery manufacturing plants, bears all the bulky equipment assembly , positioning, docking and other tasks, the overhead gantry crane high performance requirements , the use of an overhead crane used QD250/50t siemens S7-400 PLC, ABB inverter , touch screen and other high-performance configuration, application of advanced Profibus fieldbus technology , with encoder feedback direct torque control, and advanced human-machine interface system.
Divided into the main bridge crane hook, deputy hook , carts , trolleys and other four parts. Due to the main eot crane hoisting mechanism in most typical applications , control is also the most complex , so the main hoisting example in this chapter detailing its control.
1, PLC
The whole system S7-400 PLC as the core of electronic control , the main power supply module , CPU, input and output modules and interface modules and other components. Acquisition by a limit switch input modules , thermistors, inverter and other equipment fault feedback signal state ; receiving master controller , buttons, switches send control commands concentrated in the CPU operation and program operation result output module and Profibus fieldbus send contactors and inverters perform device to the drive motor , hydraulic brake , cooling fan and other complete various production tasks.
2, Profibus fieldbus system serial communication
Profibus is an open serial communication standard that enables data exchange between various automation components . In this system with S7-400 as the main station to the agencies as a slave drive by DP interface module and RS485 shielded twisted rapid real-time data exchange .
Set the inverter communication parameters :
98.02 = fieldbus communication module activation
51.01 = Profibus-DP field bus type selection
51.02 l = 3 to set the main inverter station address
51.03 = 1500 selected communications transmission rate of 1.5Mbit / s
51.04 = PPO4 select data type 4 ( 6 process data as a standard block )
As a master PLC CPU reads from the slave state of various input information, namely primary l read from the drive status word and actual values, including the drive is ready , power- response operation, the torque verification OK, inverter failure , the actual motor speed and other information ; and write information to a variety of output from the station , about the control word and speed reference written inverter. Including communications test position, from fieldbus PLC system Drive on, the start signal from the host system , fault reset signal and the actual frequency reference and so on. The complex signal conversion , monitoring, feedback process all data transmission via Profibus chain , and CPU quick focus easily .
3 , advanced man-machine interface system
TP270 touch screen and PLC Profibus bus is also used for data transmission and exchange , real-time display and monitor the operational status of the agencies and the voltage, current, torque, speed and other operating parameters , and can use its own real time fault diagnosis system Symptom judge , recording failure of various parameters , so that operators and maintenance personnel can fully understand the state of the system in a timely manner , and may prompt fault information to inspection and maintenance , to achieve accurate and fast troubleshooting effect , the real achieve a human intelligence .
4, the frequency control system
1 ) Lifting conditions and requirements
Hoisting mechanism requires a larger speed ratio and mechanical characteristics of hardness to suit the precise weight lifting requirements ; require a large starting torque ,bridge gantry crane excellent dynamic torque response ability to adapt to sudden load change , ensure that the heavy secondary lifting capacity ; must solve regenerative braking energy feedback and processing, in order to shorten the deceleration stopping time ; slide the hook must solve the problem .
2 ) conversion function application
According to the hoisting mechanism characteristics and technical requirements , the drive uses with a tachometer feedback interface 800 series drives, with ACC 7.2 Special upgrade software , form a closed loop direct torque control, through the pre-excitation function and starting torque setting , the motor starts instantaneous torque up to 300 %, achieved an excellent starting characteristics . built-in brake chopper , external braking resistor , braking process so that the generation of energy through regenerative braking resistor to be released , to achieve the purpose of rapid braking . Using a mechanical brake control function, so that the motor torque and brake release closely with better improve the safety of the equipment , the ability to withstand the impact of frequent starting and reliability also increased significantly .
General requirements for the design of crane hook
Crane hook is the main component, once corrupted very easily lead to serious injury or death. Therefore, we must strengthen the professional manufacturer of hook and general manufacturing enterprise with a hook in the hook and safety supervision and inspection work. eot crane hook design generally requires the following 10 points:
One should consider the use of environmental requirements.
2, should meet the strength, plasticity and toughness, fatigue resistance and shock functional requirements.
3, to meet the requirements of design and technology.
4, forging hook fiber orientation, should seek to comply with a hook shape distribution. Forged hook should be performed after heat treatment.
5-piece hook rolling direction of the laminations and fiber orientation, should strive to be consistent direction of the pressure must be eliminated using cutting heat-affected zone formation.
6-piece body and suspension hook and plywood does not allow access.
7, the use of forged or rolled materials can not meet the performance requirements or difficult to manufacture,hoist gantry crane the use of a casting manufacturing, must demonstrate its use or through practical experience confirms it applies only when permitted.
8, the surface and inside the hook should not be sufficient to impair its usability shortcomings.
9, manufacturing materials and purchased parts hook should have manufacturing units certificate and other technical documents, or should be tested to identify performance qualified before use.
10, after the inspection of the hook, the manufacturer shall make an appropriate position in the hook is not easy to be worn marks, and issue certification. Tag should include at least the rated weight,hoist crane production number, date of manufacture, manufacturing units, the original opening degree hook other items.
2013年8月29日星期四
The next three years , or show a downward trend in the international shipbuilding industry
Since 2011 , China's shipbuilding industry suffered a widespread "winter" , the shipbuilding industry is not optimistic the three indicators ,overhead gantry crane shipbuilding capacity growth is slowing, new orders up sharply , orderbook also accelerated decline.
For imports of marine equipment in large quantities, batch and more, and most of it comes to handling characteristics of the business and the current CCC shipbuilding industry problems , inspection and quarantine departments recommend shipbuilding enterprises to take timely measures to deal with the following :
Recognize the direction of development , adjusting the industrial structure, conditions permitting , homogeneous small shipbuilding enterprises should carry out strategic alliances , complementary advantages , the formation mechanism of competition unanimously , increase bargaining power.
Improve the technical level , and enhance the capability of independent innovation . Increase LNG carriers ,eot crane large marine equipment, high value-added production capacity, improve the overall competitiveness of shipbuilding industry , from cost advantages and product advantages to technical changes .
Emphasis on international shipbuilding new codes, standards affecting the shipbuilding industry . Carefully combined saving and energy-saving requirements to develop new ship, to avoid falling into the trap of technical barriers .
Strengthen production management , improve production efficiency. Avoid the manufacturing cycle , product quality problems led to difficulties in delivery of the ship . At the same time , strengthen the production and meticulous management , to take to improve labor productivity, promote technological progress , reduce procurement costs, improve utilization of steel , reducing energy consumption and other measures to improve profitability .
Do everything possible to ensure delivery of the ship , go all orders . Highly concerned about the container ship , LNG ships, multipurpose vessels , special vessels and marine engineering equipment and other areas of market opportunities.
Strengthen cooperation between banks and explore new financing. Vigorously carry out the ship financial leasing companies, the use of funds to establish shipbuilding industrial chain financing model .
It should be noted that the next three years will show a downward trend in the international shipbuilding industry is expected to pick up gradually until after 2015 , which is Forced Chinese shipbuilding industry to achieve leapfrog development opportunities. On the one hand , despite the downturn in the market for bulk carriers and oil tankers ,bridge gantry crane but the high value-added ships , energy-saving ships, marine engineering equipment orders have not been affected , but there was a substantial upgrade ; hand, new ship also means the end of peak demand the peak of the upcoming ship repair , shipbuilding industry will be the future has tremendous business opportunities , with the advantages of the port to implement shipbuilding industry cluster development , but also the development of domestic and international shipping industry, a successful model . Domestic shipbuilding enterprises should take timely measures to deal with the crisis in the industry , to seize the opportunities which bears , changing industrial structure, enhance the technical level, to achieve " shipbuilding power," the goal.
For imports of marine equipment in large quantities, batch and more, and most of it comes to handling characteristics of the business and the current CCC shipbuilding industry problems , inspection and quarantine departments recommend shipbuilding enterprises to take timely measures to deal with the following :
Recognize the direction of development , adjusting the industrial structure, conditions permitting , homogeneous small shipbuilding enterprises should carry out strategic alliances , complementary advantages , the formation mechanism of competition unanimously , increase bargaining power.
Improve the technical level , and enhance the capability of independent innovation . Increase LNG carriers ,eot crane large marine equipment, high value-added production capacity, improve the overall competitiveness of shipbuilding industry , from cost advantages and product advantages to technical changes .
Emphasis on international shipbuilding new codes, standards affecting the shipbuilding industry . Carefully combined saving and energy-saving requirements to develop new ship, to avoid falling into the trap of technical barriers .
Strengthen production management , improve production efficiency. Avoid the manufacturing cycle , product quality problems led to difficulties in delivery of the ship . At the same time , strengthen the production and meticulous management , to take to improve labor productivity, promote technological progress , reduce procurement costs, improve utilization of steel , reducing energy consumption and other measures to improve profitability .
Do everything possible to ensure delivery of the ship , go all orders . Highly concerned about the container ship , LNG ships, multipurpose vessels , special vessels and marine engineering equipment and other areas of market opportunities.
Strengthen cooperation between banks and explore new financing. Vigorously carry out the ship financial leasing companies, the use of funds to establish shipbuilding industrial chain financing model .
It should be noted that the next three years will show a downward trend in the international shipbuilding industry is expected to pick up gradually until after 2015 , which is Forced Chinese shipbuilding industry to achieve leapfrog development opportunities. On the one hand , despite the downturn in the market for bulk carriers and oil tankers ,bridge gantry crane but the high value-added ships , energy-saving ships, marine engineering equipment orders have not been affected , but there was a substantial upgrade ; hand, new ship also means the end of peak demand the peak of the upcoming ship repair , shipbuilding industry will be the future has tremendous business opportunities , with the advantages of the port to implement shipbuilding industry cluster development , but also the development of domestic and international shipping industry, a successful model . Domestic shipbuilding enterprises should take timely measures to deal with the crisis in the industry , to seize the opportunities which bears , changing industrial structure, enhance the technical level, to achieve " shipbuilding power," the goal.
Chinese crane industry competitiveness in the regional market Market Situation
1) Technical aspects
At present, the Chinese eot crane through years of accumulated technology, product technology matures, major product technology to large-scale, high-speed and dedicated development, standardization and diversification to the general technology development, product performance progressive realization of automation, intelligent and digitization has have the ability to participate in international competition.
2) production capacity
Domestic crane market demand exceeds the sum of the market demand in other regions around the world, of which more than 90% of production capacity is driven by Chinese demand. hoist gantry crane domestic enterprises have been efforts to expand exports share, the target is to achieve market share of 30 to 35%. Currently China crane capacity far exceeds global demand, 2011 annual capacity up to 40,000 units.
3) sales channels
Global marketing network, personnel and equipment for gradual improvement. Chinese enterprises have gradually in sales of large cranes and sales network in areas without creating a new sales outlets around the world looking for new dealers, and the corresponding complete perfect global sales and service network, in order to lay the foundation for the hoist crane industry globalization.
4) the pace of internationalization
Gradually accelerated the pace of internationalization, construction machinery exports in 2015 will reach 20 billion U.S. dollars. Currently, dozens of companies to look into overseas markets, mergers and acquisitions continue to improve the industrial chain, to expand market share, enhance competitiveness, increasing exports, and constantly win billions of dollars in export large orders, record industry history record.
At present, the Chinese eot crane through years of accumulated technology, product technology matures, major product technology to large-scale, high-speed and dedicated development, standardization and diversification to the general technology development, product performance progressive realization of automation, intelligent and digitization has have the ability to participate in international competition.
2) production capacity
Domestic crane market demand exceeds the sum of the market demand in other regions around the world, of which more than 90% of production capacity is driven by Chinese demand. hoist gantry crane domestic enterprises have been efforts to expand exports share, the target is to achieve market share of 30 to 35%. Currently China crane capacity far exceeds global demand, 2011 annual capacity up to 40,000 units.
3) sales channels
Global marketing network, personnel and equipment for gradual improvement. Chinese enterprises have gradually in sales of large cranes and sales network in areas without creating a new sales outlets around the world looking for new dealers, and the corresponding complete perfect global sales and service network, in order to lay the foundation for the hoist crane industry globalization.
4) the pace of internationalization
Gradually accelerated the pace of internationalization, construction machinery exports in 2015 will reach 20 billion U.S. dollars. Currently, dozens of companies to look into overseas markets, mergers and acquisitions continue to improve the industrial chain, to expand market share, enhance competitiveness, increasing exports, and constantly win billions of dollars in export large orders, record industry history record.
2013年8月28日星期三
Tower crane technology trends (2)
In recent years, with the development of technology tower crane, tower crane model specifications continuous improvement, performance, quality and continuous improvement, tower
overhead gantry crane s in addition to meet its secure, reliable and efficient basic performance, tends to be more intelligent and green . In China, Zoomlion is undoubtedly the most advanced technology enterprise, the following points highlight the latest technology trends. Especially international large enterprises the most advanced technology.
Intelligent control.
With digital, integrated, intelligent rapid development of technology, high reliability, low power consumption, miniaturization, integration, digitization of various hydraulic, mechanical and electrical components in a tower crane have been widely used, so that the drive and control system small size, light weight, compact structure. The control means, variable speed, security and surveillance systems, remote maintenance systems, automatic fault diagnosis system and other widely used to achieve a tower eot crane operations process control, automatic display and recording, remote remote control, etc., to ensure the tower the safe use of cranes and real-time monitoring, reducing the control points of failure and improve the reliability of tower crane, tower crane industry significantly enhance the management level.
Manufacture green.
Foreign tower bridge gantry crane s are designed to take full account of the common parts, modularity, high degree of intensification of component parts, suitable for mass production. Bulk of the parts from raw material pre-treatment, cutting, welding, machining, assembly, production lines are used to paint, so that not only improves the utilization of materials, parts commonality, product quality and aesthetics, and ease of management, reduce pollution and cost savings.
Intelligent control.
With digital, integrated, intelligent rapid development of technology, high reliability, low power consumption, miniaturization, integration, digitization of various hydraulic, mechanical and electrical components in a tower crane have been widely used, so that the drive and control system small size, light weight, compact structure. The control means, variable speed, security and surveillance systems, remote maintenance systems, automatic fault diagnosis system and other widely used to achieve a tower eot crane operations process control, automatic display and recording, remote remote control, etc., to ensure the tower the safe use of cranes and real-time monitoring, reducing the control points of failure and improve the reliability of tower crane, tower crane industry significantly enhance the management level.
Manufacture green.
Foreign tower bridge gantry crane s are designed to take full account of the common parts, modularity, high degree of intensification of component parts, suitable for mass production. Bulk of the parts from raw material pre-treatment, cutting, welding, machining, assembly, production lines are used to paint, so that not only improves the utilization of materials, parts commonality, product quality and aesthetics, and ease of management, reduce pollution and cost savings.
2013年8月25日星期日
Inadequate crane industry: basic components, basic research and development lags behind.
Through research and development, technological innovation, the introduction of digestion, China tower
bridge gantry crane business tools and accessories designed production capacity have made great progress, advanced computer design, microelectronic technology, remote monitoring and other technologies are tower crane has been applied. But the Chinese tower crane technical performance, production quality, variety and reliability models, compared with developed countries, there are still gaps, mainly reflected in: the reliability of domestic components, such as electrical components, hydraulic components, transmission components; process equipment, laboratory equipment and testing means not complete; basic research is not deep enough, such as the local structure of quantitative analysis and reliability studies. This has affected our whole product quality and reliability, increased accidents.
In addition, the transmission mechanism configured low tower eot crane has become a constraint to improve technical performance bottleneck, the host development are severely constrained. Transmission mechanism to use more than the backward speed control mode, the impact of large speed range is narrow. Hoisting mechanism is still much lower transmission efficiency using a soft tooth cylindrical gear reducer, using pole squirrel cage motor speed, two-speed motor winding plus eddy current brake governor, RCS dual motor speed; slewing mechanism to use more around line speed motor plus fluid coupling;hoist gantry crane luffing mechanism of multi-use multi-speed motor speed.
In addition, the transmission mechanism configured low tower eot crane has become a constraint to improve technical performance bottleneck, the host development are severely constrained. Transmission mechanism to use more than the backward speed control mode, the impact of large speed range is narrow. Hoisting mechanism is still much lower transmission efficiency using a soft tooth cylindrical gear reducer, using pole squirrel cage motor speed, two-speed motor winding plus eddy current brake governor, RCS dual motor speed; slewing mechanism to use more around line speed motor plus fluid coupling;hoist gantry crane luffing mechanism of multi-use multi-speed motor speed.
New bridge crane lightweight design is concerned with energy-saving technology
As a chemical, nuclear, construction and other areas of essential machinery and equipment, for decades, there has been the whole of the
bridge gantry crane itself weight, more energy, lifting height and low vulnerability. Many domestic crane manufacturer, has been engaged in research and innovation, but most manufacturers to create
The focus of the new process improvements on the main beam, a large crane structure, manufacturing costs and higher energy consumption defects still hard to change.
How to break the "short board", the implementation of competitive differentiation? Bump Heavy Industries will look aimed at "lightweight, energy-saving, intelligent crane." Which is what the current domestic eot crane industry has not yet overcome the technical problems.
Since 2008, the bump Heavy Industries began implementing the "energy-saving lightweight design crane" development plan. After four years of research and development, Heavy bump key components for cranes that lift trolley, electric hoist and crane girders, etc. of innovation and improvement. "Simply, is the
The weight of these components down, the lift going up and achieve intelligent control. "Bump Heavy chairman Zhu Jianjun said.
Lifting crane trolley is hidden in the core of the "engine." Structure in the conventional crane, a lifting capacity of 100 tons lifting trolley, its own weight is 30 tons. The "heavy" burden direct result of the hoist gantry crane in size, weight, energy consumption, the "
Backward. "
How to reduce weight even lifting the car, but also improve work efficiency? Bump Heavy flexible introduction more than 10 technical experts, lightweight lifting trolley for research and development. More than two years of exploration, not only to achieve the lifting trolley remote control while lifting force according to the situation on the start
Weight trolley wheel material, such as heat treatment process has been redesigned, lifting the car a new look.
Data show that the practical application of the same lifting height of crane trolley, reduce its weight by 55%, lifting power consumption reduced by half, the volume is significantly reduced. With the most advanced compared to similar products, the new car and light weight lifting by 9.2%. At present, this innovative technology has been applied
National invention patent.
Overhead crane in accordance with current domestic market holdings calculated that if all use of this new lightweight energy bump crane, the annual saving for the consumer with more than 500 million kwh, equivalent to the average daily power generation of Three Gorges power station more than 2 times.
The focus of the new process improvements on the main beam, a large crane structure, manufacturing costs and higher energy consumption defects still hard to change.
How to break the "short board", the implementation of competitive differentiation? Bump Heavy Industries will look aimed at "lightweight, energy-saving, intelligent crane." Which is what the current domestic eot crane industry has not yet overcome the technical problems.
Since 2008, the bump Heavy Industries began implementing the "energy-saving lightweight design crane" development plan. After four years of research and development, Heavy bump key components for cranes that lift trolley, electric hoist and crane girders, etc. of innovation and improvement. "Simply, is the
The weight of these components down, the lift going up and achieve intelligent control. "Bump Heavy chairman Zhu Jianjun said.
Lifting crane trolley is hidden in the core of the "engine." Structure in the conventional crane, a lifting capacity of 100 tons lifting trolley, its own weight is 30 tons. The "heavy" burden direct result of the hoist gantry crane in size, weight, energy consumption, the "
Backward. "
How to reduce weight even lifting the car, but also improve work efficiency? Bump Heavy flexible introduction more than 10 technical experts, lightweight lifting trolley for research and development. More than two years of exploration, not only to achieve the lifting trolley remote control while lifting force according to the situation on the start
Weight trolley wheel material, such as heat treatment process has been redesigned, lifting the car a new look.
Data show that the practical application of the same lifting height of crane trolley, reduce its weight by 55%, lifting power consumption reduced by half, the volume is significantly reduced. With the most advanced compared to similar products, the new car and light weight lifting by 9.2%. At present, this innovative technology has been applied
National invention patent.
Overhead crane in accordance with current domestic market holdings calculated that if all use of this new lightweight energy bump crane, the annual saving for the consumer with more than 500 million kwh, equivalent to the average daily power generation of Three Gorges power station more than 2 times.
2013年8月23日星期五
Indonesia: Chinese construction machinery export outlook
Many countries in Southeast Asia, Indonesia, can be described as the pearl of this emerging market. Indonesia is Southeast Asia's largest country in the total economy, the construction machinery market is Southeast Asia's most important construction machinery market.
Since 2002, Indonesia's booming construction industry,eot crane with the construction of infrastructure for construction machinery and equipment needs, the government for roads, railways, ports, airports, power stations and other investment projects totaling U.S. $ 230 billion. According to Indonesian media reports, in view of the growing demand for rail transport large Indonesian Ministry of National Railway Administration must build more railway network, according to the Indonesian government's plan, until 2030, the National Railway Administration should be able to add 10,000 2,100 km of railway lines. China Construction Machinery Business senior analyst optimistic estimates,hoist gantry crane Indonesia infrastructure market in the future will be to maintain the good momentum of rapid development.
2011 bilateral trade volume between China and Indonesia nearly $ 43 billion, China has become Indonesia's main trading partner and export markets. The Indonesian government announced the official launch of "Indonesia's economic development plan 2011-2025", the government hopes to implement the overall plan, and strive to achieve in 2025 among the world's top ten economic powers vision goals. This ambitious goal is bound to further promote the introduction of large-scale infrastructure in Indonesia building program.
In addition to traditional engineering machinery products, Indonesia mining equipment, transportation equipment and other products, demand is also very great. Indonesia is very rich in coal resources, coal industry has become a pillar industry of Indonesia's exports,hoist crane according to the Indonesian Ministry of Energy and Mines is expected that by 2025, Indonesia's coal production will reach 405 million tons, of which 2/3 will be used for export.
Since 2002, Indonesia's booming construction industry,eot crane with the construction of infrastructure for construction machinery and equipment needs, the government for roads, railways, ports, airports, power stations and other investment projects totaling U.S. $ 230 billion. According to Indonesian media reports, in view of the growing demand for rail transport large Indonesian Ministry of National Railway Administration must build more railway network, according to the Indonesian government's plan, until 2030, the National Railway Administration should be able to add 10,000 2,100 km of railway lines. China Construction Machinery Business senior analyst optimistic estimates,hoist gantry crane Indonesia infrastructure market in the future will be to maintain the good momentum of rapid development.
2011 bilateral trade volume between China and Indonesia nearly $ 43 billion, China has become Indonesia's main trading partner and export markets. The Indonesian government announced the official launch of "Indonesia's economic development plan 2011-2025", the government hopes to implement the overall plan, and strive to achieve in 2025 among the world's top ten economic powers vision goals. This ambitious goal is bound to further promote the introduction of large-scale infrastructure in Indonesia building program.
In addition to traditional engineering machinery products, Indonesia mining equipment, transportation equipment and other products, demand is also very great. Indonesia is very rich in coal resources, coal industry has become a pillar industry of Indonesia's exports,hoist crane according to the Indonesian Ministry of Energy and Mines is expected that by 2025, Indonesia's coal production will reach 405 million tons, of which 2/3 will be used for export.
Aerial of future industry development prospects
Aerial is a kind of operating personnel, tools, materials, and so on through aerial work platforms lifted to specify the location for a variety of installation, maintenance and other job-specific aerial work machinery, both belonging to private cars,overhead gantry crane but also belong to the engineering machinery, is a Important construction equipment.
The impact of macroeconomic developments
Aerial vehicles used for aerial work is an advanced way of climbing operation, and its level of development and national economic development are closely related, according to foreign media magazine aerial work machinery "AccessInternational" reports,Steel crane statistics are shown in Table 1. Economy is more developed, The greater the demand, and the greater the demand per unit of GDP. From Table 1 and Table 2 shows that the demand of the trade gap with developed countries or regions. Compared with developed countries and regions, China is not only the demand per unit of GDP is small, but the demand per unit of GDP and GDP ratio is also low, indicating that the market demand for aerial work only with the economies of scale, but also with the degree of economic development, This just shows aerial vehicles in China has a very broad prospects for development.
High security, high operating efficiency and high environmental adaptability
Aerial vehicles as an engineering vehicle, its particularity is: First manned aerial, its operational safety requirements than general engineering vehicles is high, the so-called high security; Second, the non-structural construction workplace environment, that is, its unpredictable and changing work environment, thus requiring a high adaptability to the environment; three is often used for its repair work, and more for outdoor or field operations, operating environment conditions are poor, so they requested that it has a high operating efficiency.
Cities with the engineering vehicle characteristics
Currently our users is concentrated in the city or town,hoist gantry crane and its working conditions than the general transport vehicles and construction machinery better, but mainly for the back-end infrastructure and routine maintenance and repair of its service life expectations are high, therefore, requires General construction vehicles having different characteristics requirements: Multifunction; appearance, coating color construction vehicles have both athletic, but also have cars vitality, and to maintain long-term. Flexible; may be appropriate to load cargo, such as job with the tools, equipment, materials, and so on. Can carry operations team personnel, such as the power industry 4-6 people, 3-5 people street industry, with features and construction vehicles car comfort.
Personalized, differentiated demand
As versatile aerial vehicles, involving industry and more jobs with different contents for each industry,
According to incomplete statistics, China's annual urban building maintenance only due to the use of the aerial gondola fall occurs, has led to nearly 5,000 deaths, while in developed countries, such practices have basically disappeared, replaced by aerial vehicles. Therefore, the future maintenance of the extensive use of urban architecture aerial vehicles.
Equipment leasing industry in developed countries is the main force aerial vehicles procurement, accounting for 80% of total demand, while China is almost zero, the user must use to buy. With China's construction equipment rental industry, users do not have to invest in can be rented, will inevitably lead to a large number of additions to the leasing industry,eot crane therefore leasing industry will be aerial vehicles market demand growth potential of the industry.
The foregoing analysis, referring to the situation in developed countries, China's demand for high-altitude operation truck realities and needs of the potential is very small compared to that in the next 20-30 years, China aerial vehicles will maintain a sustained rapid pace of product development. By 2015, the ownership will be 10,000 units in 2008 increased to at least 40,000 or so units, and about 10% -20% annual growth pace.
The impact of macroeconomic developments
Aerial vehicles used for aerial work is an advanced way of climbing operation, and its level of development and national economic development are closely related, according to foreign media magazine aerial work machinery "AccessInternational" reports,Steel crane statistics are shown in Table 1. Economy is more developed, The greater the demand, and the greater the demand per unit of GDP. From Table 1 and Table 2 shows that the demand of the trade gap with developed countries or regions. Compared with developed countries and regions, China is not only the demand per unit of GDP is small, but the demand per unit of GDP and GDP ratio is also low, indicating that the market demand for aerial work only with the economies of scale, but also with the degree of economic development, This just shows aerial vehicles in China has a very broad prospects for development.
High security, high operating efficiency and high environmental adaptability
Aerial vehicles as an engineering vehicle, its particularity is: First manned aerial, its operational safety requirements than general engineering vehicles is high, the so-called high security; Second, the non-structural construction workplace environment, that is, its unpredictable and changing work environment, thus requiring a high adaptability to the environment; three is often used for its repair work, and more for outdoor or field operations, operating environment conditions are poor, so they requested that it has a high operating efficiency.
Cities with the engineering vehicle characteristics
Currently our users is concentrated in the city or town,hoist gantry crane and its working conditions than the general transport vehicles and construction machinery better, but mainly for the back-end infrastructure and routine maintenance and repair of its service life expectations are high, therefore, requires General construction vehicles having different characteristics requirements: Multifunction; appearance, coating color construction vehicles have both athletic, but also have cars vitality, and to maintain long-term. Flexible; may be appropriate to load cargo, such as job with the tools, equipment, materials, and so on. Can carry operations team personnel, such as the power industry 4-6 people, 3-5 people street industry, with features and construction vehicles car comfort.
Personalized, differentiated demand
As versatile aerial vehicles, involving industry and more jobs with different contents for each industry,
According to incomplete statistics, China's annual urban building maintenance only due to the use of the aerial gondola fall occurs, has led to nearly 5,000 deaths, while in developed countries, such practices have basically disappeared, replaced by aerial vehicles. Therefore, the future maintenance of the extensive use of urban architecture aerial vehicles.
Equipment leasing industry in developed countries is the main force aerial vehicles procurement, accounting for 80% of total demand, while China is almost zero, the user must use to buy. With China's construction equipment rental industry, users do not have to invest in can be rented, will inevitably lead to a large number of additions to the leasing industry,eot crane therefore leasing industry will be aerial vehicles market demand growth potential of the industry.
The foregoing analysis, referring to the situation in developed countries, China's demand for high-altitude operation truck realities and needs of the potential is very small compared to that in the next 20-30 years, China aerial vehicles will maintain a sustained rapid pace of product development. By 2015, the ownership will be 10,000 units in 2008 increased to at least 40,000 or so units, and about 10% -20% annual growth pace.
2013年8月22日星期四
China has become an important global crane market
With the Chinese economy and the rapid development of infrastructure, led the Chinese crane market's rapid development, China has become an important global crane market. The rapid development of
hoist crane , lifting equipment is stimulated by market boom, lifting equipment development to bring more power source.
According to the analysis, in recent years, especially in areas of the energy industry to develop, led the Chinese crane industry's continued healthy development, it is driven by a large number of extremely powerful lifting equipment construction enterprises. China lifting industry has emerged a group with considerable scale and strong competitive large lifting equipment companies; these lifting equipment manufacturing enterprises, but also with Chinese crane market, overseas expansion into foreign markets is also positive.
Lifting equipment industry and the eot crane industry can be said that mutual promotion and mutual development. China lifting equipment in the field of rapid development, but also for the Chinese crane industry has supported the development. At present the domestic crane market, brings together almost all of the world-renowned manufacturers. Many foreign brands have a large crane assembly manufacturing base in the country to build, it can be said is also very optimistic about the strength of domestic enterprises lifting equipment.
Large foreign lifting equipment to seize the Chinese market, coupled with the escalating demand for Chinese users, for local businesses and lifting equipment lifting machinery enterprises, it is an opportunity and a challenge. There is competition, will progress.jib crane Local enterprises in response to the lifting equipment and lifting equipment market changes in the products and technologies are also constantly innovate.
According to the analysis, in recent years, especially in areas of the energy industry to develop, led the Chinese crane industry's continued healthy development, it is driven by a large number of extremely powerful lifting equipment construction enterprises. China lifting industry has emerged a group with considerable scale and strong competitive large lifting equipment companies; these lifting equipment manufacturing enterprises, but also with Chinese crane market, overseas expansion into foreign markets is also positive.
Lifting equipment industry and the eot crane industry can be said that mutual promotion and mutual development. China lifting equipment in the field of rapid development, but also for the Chinese crane industry has supported the development. At present the domestic crane market, brings together almost all of the world-renowned manufacturers. Many foreign brands have a large crane assembly manufacturing base in the country to build, it can be said is also very optimistic about the strength of domestic enterprises lifting equipment.
Large foreign lifting equipment to seize the Chinese market, coupled with the escalating demand for Chinese users, for local businesses and lifting equipment lifting machinery enterprises, it is an opportunity and a challenge. There is competition, will progress.jib crane Local enterprises in response to the lifting equipment and lifting equipment market changes in the products and technologies are also constantly innovate.
Refinement is a focus of future development direction of the crane
Although China has become the world's largest
eot crane market, the largest exporter of small tonnage crane products, but the large tonnage crane competitiveness is still insufficient, engines, hydraulic parts as well as the development of electronic control system is still hindered. For large tonnage technological breakthroughs more hopes on technical strength of the domestic large enterprises, because of the large-tonnage products are technology-oriented small and medium enterprises fear the lack of technical and financial support precipitation.
With the national electric power, petrochemical, steel, transportation and other infrastructure construction reached a climax, the domestic market with the rapid expansion of the crane. Crane has become the trend of large irreversible fact. In addition, companies can do a good job marketing the gantry crane coordination, to ensure performance of the contract, to achieve product delivery schedule, set up overseas repair outlets, service on the export of products to increase efforts to improve the recognition of overseas customers, and constantly improve the sales process , with services to boost market share gains.
Currently, the industry segment has been the early clues, Refinement is a key direction for future development. Therefore, for customers in different areas to provide specialized products, to the maximum extent to meet their specific needs has become the most brands next stage of development focus.bridge gantry crane Not only is the lifting industry is moving towards a customer-centric marketing concept of change, the whole construction machinery industry are constantly increasing sales concepts, change the development model.
With the national electric power, petrochemical, steel, transportation and other infrastructure construction reached a climax, the domestic market with the rapid expansion of the crane. Crane has become the trend of large irreversible fact. In addition, companies can do a good job marketing the gantry crane coordination, to ensure performance of the contract, to achieve product delivery schedule, set up overseas repair outlets, service on the export of products to increase efforts to improve the recognition of overseas customers, and constantly improve the sales process , with services to boost market share gains.
Currently, the industry segment has been the early clues, Refinement is a key direction for future development. Therefore, for customers in different areas to provide specialized products, to the maximum extent to meet their specific needs has become the most brands next stage of development focus.bridge gantry crane Not only is the lifting industry is moving towards a customer-centric marketing concept of change, the whole construction machinery industry are constantly increasing sales concepts, change the development model.
Large crane erection Technical Guidelines for Safety instructionseot crane
Universal gantry
eot crane because they belong to large equipment, so installation should be done by erecting a qualified professional with the installation department is responsible for. Erection of the installation process, to observe the following safety technology rules:
1) Universal gantry crane erected before the commanding officers of all personnel should participate in erecting details lifting method, lifting step, command signal, precautions and individual responsibility should be borne by the members.
2) Crane Erection area, without adequate lighting equipment is prohibited at night erection work.
3) prohibits any person together with the gantry crane hoisting, nor along the rope or pulley drop.
4) In the erection area, to ensure that persons charged shall not touch bare.
5) Universal gantry crane lifting the erection process is prohibited under the crane to stay in or pass. With the erection unrelated persons are not allowed to enter the set area.
6) To prepare the blackout prevention efforts and ensure effective lifting braking system.
7) In order to check whether the work is completely normal erection, should be first crane lifting 100 to 200 mm from the ground, stay for some time, carefully inspect all lifting equipment and lifting tools have all the right places, is firmly tied, cranes whether the center of gravity right so that only parts of correct recognition only after the formal erection of work to do.
8) Universal gantry bridge crane installed under the crossbar when the first put to the track, and then the legs and lower beams fixed cable connection and with the wind, and then lifting the leg of the main beams, integrally connected with bolts finally lifting trolley. For the main beam length greater than 35m, you need to be bolted into the ground then lifting the whole.
1) Universal gantry crane erected before the commanding officers of all personnel should participate in erecting details lifting method, lifting step, command signal, precautions and individual responsibility should be borne by the members.
2) Crane Erection area, without adequate lighting equipment is prohibited at night erection work.
3) prohibits any person together with the gantry crane hoisting, nor along the rope or pulley drop.
4) In the erection area, to ensure that persons charged shall not touch bare.
5) Universal gantry crane lifting the erection process is prohibited under the crane to stay in or pass. With the erection unrelated persons are not allowed to enter the set area.
6) To prepare the blackout prevention efforts and ensure effective lifting braking system.
7) In order to check whether the work is completely normal erection, should be first crane lifting 100 to 200 mm from the ground, stay for some time, carefully inspect all lifting equipment and lifting tools have all the right places, is firmly tied, cranes whether the center of gravity right so that only parts of correct recognition only after the formal erection of work to do.
8) Universal gantry bridge crane installed under the crossbar when the first put to the track, and then the legs and lower beams fixed cable connection and with the wind, and then lifting the leg of the main beams, integrally connected with bolts finally lifting trolley. For the main beam length greater than 35m, you need to be bolted into the ground then lifting the whole.
2013年8月21日星期三
Crane type of work
Crane types of work: refers to how busy working crane and loading degree of change parameters.
How busy work, the bridge gantry crane terms, this means the total time in a year, the actual operation of the crane and the total number of hours when the ratio of the number; against institutions, it refers to an institution operating hours within a year the ratio of the total number of hours. A work cycle of the crane, the agency running time percentage, called the agency's duty cycle, expressed by JC. Changes in load level, according to the design rated capacity of the crane in the actual operation, the crane lifting loads are often less than the rated capacity. The degree of this change in load lifting capacity utilization factor k. k = crane year's actual average starting weight / crane's rated capacity.
According to the work of the crane and the load busy the degree of change, the type of work the crane usually divided into: light, intermediate, heavy and extra heavy duty grade four levels.
The type of work the crane and lifting capacity are two different concepts, lifting capacity, is not necessarily a weight class, from the weight of a small, not necessarily light level. Such as hydropower eot crane lifting capacity with hundreds of tons, but not much chance to use only the installation unit, used only when repairing the unit, and the remaining time stop there, so even though from the weight of large, but still belongs to light level . Another example is the use of the station yard gantry crane, although from the weight of small, but very busy, are heavy duty type.
How busy work, the bridge gantry crane terms, this means the total time in a year, the actual operation of the crane and the total number of hours when the ratio of the number; against institutions, it refers to an institution operating hours within a year the ratio of the total number of hours. A work cycle of the crane, the agency running time percentage, called the agency's duty cycle, expressed by JC. Changes in load level, according to the design rated capacity of the crane in the actual operation, the crane lifting loads are often less than the rated capacity. The degree of this change in load lifting capacity utilization factor k. k = crane year's actual average starting weight / crane's rated capacity.
According to the work of the crane and the load busy the degree of change, the type of work the crane usually divided into: light, intermediate, heavy and extra heavy duty grade four levels.
The type of work the crane and lifting capacity are two different concepts, lifting capacity, is not necessarily a weight class, from the weight of a small, not necessarily light level. Such as hydropower eot crane lifting capacity with hundreds of tons, but not much chance to use only the installation unit, used only when repairing the unit, and the remaining time stop there, so even though from the weight of large, but still belongs to light level . Another example is the use of the station yard gantry crane, although from the weight of small, but very busy, are heavy duty type.
What crane safety device
To ensure safe and reliable lifting operations,
jib crane equipped with a better safety devices in order to unexpected circumstances, play a protective parts or alert the operator, and thus play a security role.
A hydraulic system, the pressure relief valve: inhibit loop abnormally high pressure in order to prevent damage to the hydraulic pumps and motors, and to prevent is overloaded.
2 luffing jib safety device: When the unexpected accident, boom luffing cylinder loop pressure hose or pipe burst or cut off, the hydraulic circuit balancing valves on the work, lock cylinder lower chamber from work oil, the boom will not fall, thereby ensuring the safety of operation.
3 telescopic eot crane safety device: When unexpected accidents, telescopic boom cylinder circuit of the high-pressure hose or pipe burst or cut off, the hydraulic circuit balancing valves on the work, lock cylinder lower chamber from the working oil, the suspension will retract themselves, thus ensuring the safety of operation.
4 height limit device: hook up the required height to rise after touching limit hammer, turn the trip switch, "over round" indicator light that is bright, while cutting off the hook lifting, boom stretched out, hanging Arm volts to the operation of such action to ensure safety. Then just manipulate the hook down, boom boom retracted or looked up (to the Security side operation), etc. handle, lift the weight limit constraint, the operation returns to normal. For special occasions, such as still need to make a small amount of over-winding operation, press the release button on the meter box, this time limit will be lifted role, but this time the operation must be very careful to prevent accidents.
5 leg locking device: When unexpected accident occurred, leading to the leg vertical cylinder hoses or tubing rupture or cutting, the hydraulic system can be disabled with a two-way hydraulic lock cylinder two leg blocking pressure oil chamber, the branch Notations or throw the legs,bridge crane thereby ensuring the safety of the lifting operation.
6 from the weight indicator: Starting weight indicator is set in the basic arm together side (ie, the right side of the cab), the operator sitting in the control room can be clearly observed, can accurately indicate the boom elevation and the corresponding conditions allow cranes rated capacity.
7 Lifting Characteristics Table: Set in the control room on the front side of the lower wall, the table lists the various arm lengths and a variety of work rate and the nominal weight lifting height for operation inspection. Lifting operation, must not exceed the values specified in the table. To ensure safe and reliable lifting operations, Steel crane equipped with a better safety devices in order to unexpected circumstances, play a protective parts or alert the operator, and thus play a security role.
A hydraulic system, the pressure relief valve: inhibit loop abnormally high pressure in order to prevent damage to the hydraulic pumps and motors, and to prevent is overloaded.
2 luffing jib safety device: When the unexpected accident, boom luffing cylinder loop pressure hose or pipe burst or cut off, the hydraulic circuit balancing valves on the work, lock cylinder lower chamber from work oil, the boom will not fall, thereby ensuring the safety of operation.
3 telescopic eot crane safety device: When unexpected accidents, telescopic boom cylinder circuit of the high-pressure hose or pipe burst or cut off, the hydraulic circuit balancing valves on the work, lock cylinder lower chamber from the working oil, the suspension will retract themselves, thus ensuring the safety of operation.
4 height limit device: hook up the required height to rise after touching limit hammer, turn the trip switch, "over round" indicator light that is bright, while cutting off the hook lifting, boom stretched out, hanging Arm volts to the operation of such action to ensure safety. Then just manipulate the hook down, boom boom retracted or looked up (to the Security side operation), etc. handle, lift the weight limit constraint, the operation returns to normal. For special occasions, such as still need to make a small amount of over-winding operation, press the release button on the meter box, this time limit will be lifted role, but this time the operation must be very careful to prevent accidents.
5 leg locking device: When unexpected accident occurred, leading to the leg vertical cylinder hoses or tubing rupture or cutting, the hydraulic system can be disabled with a two-way hydraulic lock cylinder two leg blocking pressure oil chamber, the branch Notations or throw the legs,bridge crane thereby ensuring the safety of the lifting operation.
6 from the weight indicator: Starting weight indicator is set in the basic arm together side (ie, the right side of the cab), the operator sitting in the control room can be clearly observed, can accurately indicate the boom elevation and the corresponding conditions allow cranes rated capacity.
7 Lifting Characteristics Table: Set in the control room on the front side of the lower wall, the table lists the various arm lengths and a variety of work rate and the nominal weight lifting height for operation inspection. Lifting operation, must not exceed the values specified in the table. To ensure safe and reliable lifting operations, Steel crane equipped with a better safety devices in order to unexpected circumstances, play a protective parts or alert the operator, and thus play a security role.
2013年8月19日星期一
Lifting promise made to obtain permits
After its promised scale enterprises produced the largest prototype (through type experiments) and production conditions for maximum production of prototype (after determining assessed to determine) then give clearly defined, so, in order to express a real scale production unit promised to produce promised evidence released only in accordance with the type.overhead gantry crane In order to reduce the corporate shoulder, thinking that many companies have produced products for many years, starting from the actual situation, rules, agreed to permit the production scale, the same type of series of products according to specification (primary parameter) from high to low cover (attention: Actual on specifications from high to low cover, in theory, is still worthy of further discussion, currently only one kind of test).hoist gantry crane Simply fit the State Quality Supervision, Inspection and clear pot [2003] No. 305 document fourth rule, once the type of experiment after experiment need not be repeated, and the expiry of the permit renewal when promised, promised to have clarity on the type of card, type will no longer be repeated type of experiment, simplifying order to facilitate the production unit, to which most of the production units show understanding and echo.eot crane In addition, the current crane type of experiment addition to the above mentioned areas, but also include imports of lifting machinery, lifting machinery through the CCC certification, the specific practices of technical specifications in accordance with appropriate safety performance.
Electric overhead crane operating procedures
Now do the electric overhead
Steel crane s procedures described below:
1 The operator must go through specialized technical training of qualified and holds the device operating permit before operation. The operator must strictly comply with the relevant safety regulations and the shift system.
(2) Workers should be strictly in accordance with the preceding provisions of lubricating grease, oil and keep fit, oil flow, oil standard (windows) eye-catching, oil cup clean.
3 Check the transmission, steering mechanism, the size of car walking wheel, reel, hook, pulley, pin, wire rope for wear and damage to the office and check the track and within walking without obstacles.
4 Check the signal bell, lights and lighting equipment is perfect, lifting height and walking test limit switches, as well as the brake action is sensitive and reliable.
5 when the hook in the lower position, the rope should be left on the roll at least twice or more. Wear and corrosion resistance over the surface of the wire rope diameter of more than 40% of one or a twist to break away from the root of the number of broken wires within more than 5% of cis-wound wire,overhead bridge crane steel wire around each of 10%, should be discontinued.
6 job, just listen to one person commanding the driver, the driver and conductor should be obvious hand signals. Before lifting the driver should be ringing signal echoed into the crane in case of danger or failure, regardless of the signal from the bottom of who should be immediately stopped.
7 The first hook should first try jib crane , bridge crane will be removed from the ground 200 mm weight when doing brake test and confirm before lifting a good job. The process of moving, should make lifting weights all the way objects move above 0.5 m or more.
8 crane lift, start, stop should be slow to prohibit the operation of a sudden change of direction. When the big, trolley close to the end, the application of the slowest speed, prohibit the use of stopper as a means to stop running.
9 In case of a sudden power outage, a large voltage drop or equipment failure, the driver should immediately move to zero for all controllers, and pull the power switch, if the weight is hanging position should take measures to slow landing weight .
10 prohibits heavy or hanging pull stayed buried in the sand and other objects of the workpiece.
11 Two electric overhead traveling cranes on the same track must be more than 2 meters apart. To use a eot crane to promote another crane, first loosen the brake is pushed crane walking.
12 wire rope should be regularly checked and oiled once every 15 days, oiled rope on the front of the grease should be cleaned debris, the oil is heated to about 60 ℃, in order to facilitate oil seep strand gap.
13 The workers should hook after rising, the car stops at the end of the cab and check, cleaning equipment, do routine maintenance work for each of the operating handle (switch) is placed in neutral (zero), cut off the power switch, locked cab, reach neat, clean and safe.
1 The operator must go through specialized technical training of qualified and holds the device operating permit before operation. The operator must strictly comply with the relevant safety regulations and the shift system.
(2) Workers should be strictly in accordance with the preceding provisions of lubricating grease, oil and keep fit, oil flow, oil standard (windows) eye-catching, oil cup clean.
3 Check the transmission, steering mechanism, the size of car walking wheel, reel, hook, pulley, pin, wire rope for wear and damage to the office and check the track and within walking without obstacles.
4 Check the signal bell, lights and lighting equipment is perfect, lifting height and walking test limit switches, as well as the brake action is sensitive and reliable.
5 when the hook in the lower position, the rope should be left on the roll at least twice or more. Wear and corrosion resistance over the surface of the wire rope diameter of more than 40% of one or a twist to break away from the root of the number of broken wires within more than 5% of cis-wound wire,overhead bridge crane steel wire around each of 10%, should be discontinued.
6 job, just listen to one person commanding the driver, the driver and conductor should be obvious hand signals. Before lifting the driver should be ringing signal echoed into the crane in case of danger or failure, regardless of the signal from the bottom of who should be immediately stopped.
7 The first hook should first try jib crane , bridge crane will be removed from the ground 200 mm weight when doing brake test and confirm before lifting a good job. The process of moving, should make lifting weights all the way objects move above 0.5 m or more.
8 crane lift, start, stop should be slow to prohibit the operation of a sudden change of direction. When the big, trolley close to the end, the application of the slowest speed, prohibit the use of stopper as a means to stop running.
9 In case of a sudden power outage, a large voltage drop or equipment failure, the driver should immediately move to zero for all controllers, and pull the power switch, if the weight is hanging position should take measures to slow landing weight .
10 prohibits heavy or hanging pull stayed buried in the sand and other objects of the workpiece.
11 Two electric overhead traveling cranes on the same track must be more than 2 meters apart. To use a eot crane to promote another crane, first loosen the brake is pushed crane walking.
12 wire rope should be regularly checked and oiled once every 15 days, oiled rope on the front of the grease should be cleaned debris, the oil is heated to about 60 ℃, in order to facilitate oil seep strand gap.
13 The workers should hook after rising, the car stops at the end of the cab and check, cleaning equipment, do routine maintenance work for each of the operating handle (switch) is placed in neutral (zero), cut off the power switch, locked cab, reach neat, clean and safe.
2013年8月18日星期日
Overhead crane new application - inverter
Speaking of
bridge gantry crane , has a wide application in industrial and mining enterprises, mainly used to achieve the object of lifting and transport. Its frequency control system is mainly about the following characteristics:
1 The original four AC induction motor rotor winding shorted directly to the center, all the rotor circuit cables, resistors, contactors frequency sensitive rheostat and the abolition of all;
2 In the lane Tops 3 stainless steel control cabinet, protection class ip54. Frequency control cabinet a winch, big, car inverter + plc control cabinet one, a braking resistor cabinet, stainless steel cabinet to achieve the anti-corrosion, moisture, dust purpose alumina industry to adapt to the harsh corrosive dust working environment requirements;
3 jib crane inverter selection abb acs800 series high performance inverter, inverter motor control winch hoist system software application macros, control large car motor drive system software use the standard application macros;
4.plc selection siemens s7-200 series plc issued control handle to open, stop, fast, slow, promotion, decentralization and other instructions, the corresponding plc issued a directive to control the drive Reversible and various speeds to reach the bridge crane's best control state;
5 braking torque generated by the drive when the eot crane motor from the load receiving mechanical energy into electrical energy it into the inverter, resulting in DC pressure, the inverter must deal with this part of the energy, or the DC circuit the capacitor is overcharged, over-voltage protection action will make it stop running, so set the inverter DC circuit braking unit and braking resistor, the crane falling released during braking energy consumption in the braking resistor ;
6.plc according to the control program, the input control signal and enhanced decentralization and other instructions to complete various conditions hoist crane coordination and control;
7 linkage console has two, can multiple speed control.
1 The original four AC induction motor rotor winding shorted directly to the center, all the rotor circuit cables, resistors, contactors frequency sensitive rheostat and the abolition of all;
2 In the lane Tops 3 stainless steel control cabinet, protection class ip54. Frequency control cabinet a winch, big, car inverter + plc control cabinet one, a braking resistor cabinet, stainless steel cabinet to achieve the anti-corrosion, moisture, dust purpose alumina industry to adapt to the harsh corrosive dust working environment requirements;
3 jib crane inverter selection abb acs800 series high performance inverter, inverter motor control winch hoist system software application macros, control large car motor drive system software use the standard application macros;
4.plc selection siemens s7-200 series plc issued control handle to open, stop, fast, slow, promotion, decentralization and other instructions, the corresponding plc issued a directive to control the drive Reversible and various speeds to reach the bridge crane's best control state;
5 braking torque generated by the drive when the eot crane motor from the load receiving mechanical energy into electrical energy it into the inverter, resulting in DC pressure, the inverter must deal with this part of the energy, or the DC circuit the capacitor is overcharged, over-voltage protection action will make it stop running, so set the inverter DC circuit braking unit and braking resistor, the crane falling released during braking energy consumption in the braking resistor ;
6.plc according to the control program, the input control signal and enhanced decentralization and other instructions to complete various conditions hoist crane coordination and control;
7 linkage console has two, can multiple speed control.
2013年8月16日星期五
Gantry safe operation and maintenance
I. Prohibition overload gantry.
Second, the prohibition tilt lifting items.
Third, the ban on the slopes using gantry.
Fourth, in the lifting process,eot crane the non-rotating to avoid cargo cargo encounter bracket.
Fifth, ban people together with the goods lift.
Sixth, do not allow prolonged stay in the air cargo hoist crane s, gantry lifting cargo, the operator shall not leave.
Seven, lifting goods, prohibited personnel lifting objects and walking down to do any work.
Eight, in the process of lifting cargo, mobile gantry is strictly prohibited.
Nine, always check whether the parts screw loosening, timely maintenance.
Ten, in strict accordance with the instruction manual operation by supporting the electric hoists, chain hoists and sports car.
Eleven, if the choice of rail-mounted gantry and electric hoists,hoist gantry crane work has been completed, turn off the power
Second, the prohibition tilt lifting items.
Third, the ban on the slopes using gantry.
Fourth, in the lifting process,eot crane the non-rotating to avoid cargo cargo encounter bracket.
Fifth, ban people together with the goods lift.
Sixth, do not allow prolonged stay in the air cargo hoist crane s, gantry lifting cargo, the operator shall not leave.
Seven, lifting goods, prohibited personnel lifting objects and walking down to do any work.
Eight, in the process of lifting cargo, mobile gantry is strictly prohibited.
Nine, always check whether the parts screw loosening, timely maintenance.
Ten, in strict accordance with the instruction manual operation by supporting the electric hoists, chain hoists and sports car.
Eleven, if the choice of rail-mounted gantry and electric hoists,hoist gantry crane work has been completed, turn off the power
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