Shipbuilding gantry crane safety monitoring and management system

With the development of society, economic prosperity, port handling equipment is toward automation, high-speed, large-scale and heavy in the direction of development in order to improve the efficiency of port handling operations. In order to ensure safety in Steel crane production , reduce the incidence of accidents , the safety of large lifting machinery monitoring and management is imperative. State Administration of Work Safety , AQSIQ also in 2011 began requiring the progressive realization of the installation of security monitoring and management systems on large lifting machinery, especially the first pilot asked for shipbuilding gantry crane , and clearly the 2014 shipbuilding gantry crane compulsory installation of safety monitoring and management system . System functional requirements in order to achieve effective management of shipbuilding gantry crane and effectively monitor hoist gantry crane the health of the security situation , the functional safety monitoring and management system must meet the following requirements ( 1 ) shall be monitored directly related to the crane usage may lead to security incidents crane operation parameters, including lifting , lifting height , each trolley trip, carts run deflection, wind speed, the same or a different orbit from the security agencies , operating instructions, working hours and total working hours, work cycle and accumulated work cycle. ( 2 ) should be able to easily monitor the status of security incidents resulting in work organization and work equipment, including hoisting mechanism brake status .

How to treat electric double girder crane it?

Is now on the market for electric double girder  Steel crane   are to be properly managed, like this mechanical equipment if you do not manage them properly or in the use of the time to pay more attention, be careful, it may be more time broken short, because the pressure is too large or super overdraft work will make electric double girder crane on the market cut short the life of the moment, so that you want to extend the life of the electric double girder crane that is relatively good, so now how to treat electric double beam crane it?
1 Installation
Installation is now on the market using electric double girder  hoist gantry crane  products business is more general in its use of the process is more useful, like this large product development hope is relatively rare, but the electric double girder crane is one of them, at the time of its installation are more installation requirements, under normal circumstances in the process of installing them is a more demand, but the installation also requires a process, and can not at once installation is complete .
(2) Maintenance
Treat electric double girder  overhead gantry crane  at the time is the need to take good care of them, because in the course of its maintenance is relatively good, the better the general maintenance of life will seem longer, only in this case the following can appear a little better, maintenance of good product development, the better.
This is the kind of electric double girder crane in several ways.

The implementation of " going out" strategy, and actively expand the international footprint

  Implementation of the enterprises "going out " strategy, carrying out international capital operation "Dances with Wolves " is the transformation of economic development to the country 's positive practice .
    Chinese enterprises international operations provides us with an opportunity to close in the international market ,hoist gantry crane will effectively enhance the international competitiveness of Chinese enterprises , and promote China from a manufacturing power to create powerful shift from extensive , quantity to quality , and efficiency transformation.
Throughout the dominating international world-class enterprises, they have similar characteristics - the main business income in the world, with a global brand image and leading-edge technology , leading the industry change and innovation , with advanced management tools and unique development strategy , with professional, professional staff. These companies provide products and services to the world , while also convey their country 's culture.
    China's  Steel crane  manufacturing industry , the general supply of spare parts is very adequate , however , such as transmission components , control components , diesel engines and hydraulic parts and other key high-tech, high value-added core components of the primary still dependent on imports, serious restricting China's equipment manufacturing industry to the development of high- technology products . With China's economic structural adjustment, change the mode of development to accelerate the pace of domestic enterprises have been trying to break through the key components of the core technology , more and more Chinese enterprises to the sea voyage , to strengthen international capital operation , hoping to obtain cross-border mergers and acquisitions abroad advanced technology to enhance their core competitiveness.
    Indeed, over the 2012 , China 's construction machinery industry staged more than the case of overseas mergers and acquisitions of Chinese enterprises "going out " shows not only its own brand image , it is the country's image .
To sum up, China issued two sessions on " construction machinery " sound , the sound piercing the current construction machinery industry, the existence of various deficiencies and shortcomings , but also for China 's future development of construction overhead gantry crane  clear . Waits for no man , we need to further cultivate internal strength , a positive innovation , efforts to expand overseas markets , to participate fully in international competition. Only in this way , China 's construction machinery to be able to really strong , we are able to China from a large industrial country into an industrial powerhouse !

Portal crane boom system

Gantry  Steel crane  boom system is transmitted to the rotating platform to load the main components, can be made into single boom boom system or combination of systems.

Arm rack system: single boom luffing system is divided into rigid and flexible cable transmission amplitude of the arm frame. The former is characterized by the boom arm of the entire boom system is only rigid parts, as with weight balance system and a rigid arm drive means, which are arranged close to the luffing jib pull the root point, relying on the screw, screw drive achieve pitching arm. The second boom boom without balancing device luffing jib rope fixed on the head, relying on the income and the flexible cable release to achieve jib luffing.

Combination boom system: four-link portal overhead gantry crane  boom system is modular crane jib a typical pattern, it avoids some of the shortcomings arm frame body, so a combination boom system is widely used. And this combined with flexible arm can be divided into rigid cable type and cable type two.

1, the flexible cable type. It is the use of wire rope for the rod, and with the rear trunk frame geometry shape of the curve must achieve a level luffing movement of goods in the process. The whole structure lighter weight, but there are less rigid structure, rear rack and trunk cable connections easy to wear and other shortcomings. Previously in the small gantry  jib crane  lifting weight greater use in recent years has gradually been rigid rod replaced jib combinations.

2, the rigid rod combination arm. Rigid rod jib combination is determined by the trunk frame, rigid rod and hinge arm three part through the combination and makes up four-bar linkage with the rack in order to achieve a level luffing cargo movement process.

2013 China Industrial Automation Equipment Development Trend Analysis

With the deepening of social information , key industries critical task will increasingly rely on industrial machines,gantry crane and to IPC -based low-cost industrial control automation are becoming mainstream , local industrial machine manufacturers and the attention degree increasingly high. With electric power, metallurgy , petrochemical, environmental protection, transportation , construction and other industries developed rapidly, from a digital set-top boxes for home use , digital TV, to the bank teller , highway toll collection system , gas station management , manufacturing production line control , finance, government , defense and other industries increasing demand for information technology , a large demand for IPC , IPC market prospect is very broad.


First, the development trend analysis
 ( 1 ) specialized
 DCS is more suitable for the respective fields of application ,bridge gantry crane it is necessary to further understand the professional technology and application requirements, such as nuclear power plants in order to gradually form this S, change drill DGS, glass and cement DCS DCS and other .
 ( 2 ) to an integrated direction
 Because standardized data communication lines and communication networks, the various single ( multi ) loop controller , PLC, industrial ratio , NC and other industrial equipment constitutes a large system to meet the requirements of factory automation , and adapt to the trend of opening .
 ( 3 ) to the intelligent direction
 Because database systems, reasoning functions such as development, particularly in knowledge-based systems (KBS) and expert system (ES) applications, such as self-learning control , remote diagnostics and look for Excellence , artificial intelligence will be implemented at all levels in the DCS . And FF Fieldbus similar to microprocessor-based smart devices, such as intelligent I / O intelligent PID control, intelligent sensors, transmitters , actuators , intelligent human interfaces and programmable regulator has emerged.
 ( 4 ) Industrial PC technology
 Since S Gong became a big part of this trend , PC as the DCS operator station or node machine has been very common . PC-PLC, PC-S, 19, Pc-Nc so is Pc-Dcs pioneer .

Two , IPC Market Distribution


At present, the T- controlling machine supply channels mainly from China Taiwan and the mainland manufacturers, foreign products after years of market grappling , due to high costs , high prices, service difficult , is now completely out of the domestic market. At present, the domestic IT industry, research and development, processing technology to constantly improve ; kinds of chips and a variety of devices , cattle production :hoist gantry crane did not prepare an equal footing in the international market is basically optional ; software resources portability can save a lot of manpower and material resources. In these favorable conditions, some domestic manufacturers seize the opportunity to rise rapidly , the use of local competitive advantages in foreign brands will gradually squeeze the domestic labor market. Some businesses more than 100% per year growth rate of assets , utmost in the domestic industrial market, and has successfully entered the international labor market.

Industrial sector 's products and technology is very special , are intermediate products for other industries to provide reliable , embedded , intelligent industrial computer . With the deepening of social information , key industries critical task will increasingly rely on industrial machines, and to IPC -based low-cost industrial control automation are becoming mainstream , local industrial machine manufacturers and the attention degree increasingly high. With electric power, metallurgy , petrochemical, environmental protection, transportation , construction and other industries developed rapidly, from a digital set-top boxes for home use , digital TV,Steel crane to the bank teller , highway toll collection system , gas station management , manufacturing production line control , finance, government , defense and other industries increasing demand for information technology , a large demand for IPC , IPC market prospect is very broad.

China's construction crane industry status and future development of

Address the issue , to strengthen self-reflection

At present, China's construction  jib crane  industry affected by overcapacity , marketing tools are not standardized, product homogeneity and rising operating costs and other unfavorable factors, led to a price war industry , corporate capital chain issues grim , profitability is becoming increasingly difficult problems, leading enterprises operating deteriorating SMEs face life and death decisions , industry operating pressures continue to increase . Industries and enterprises to rationally analyze and address these issues resolved quickly .

Connotation and denotation , seeking to develop the path

2012 , China's construction crane industry in the market ups and difficulties ahead . Construction  Steel crane  industry is facing a new shuffle , how in the fierce competition in the market through difficult times , become the primary task of the current strategic development .

Organic growth is sustainable and stable development foundation

Increase product core technology research and optimize the product structure , improve product quality , foster product innovation capabilities, platform technology, security technology, environmental technology , energy technology and other fields to establish a common platform for the industry , vigorously develop innovative , energy saving, reduction rows of high-end products . Enhanced ability to resist risks strengthen the industry 's scientific judgment and market forecasts, and industry self- consciously combined with increased operational capacity to resist risks . Optimize production patterns and resource allocation should increase technical and supporting platform development and the transformation of the efforts to reduce manufacturing costs and improve after-market service capabilities. Strengthen the industry and corporate synergies and avoid vicious market competition and price Rush .

Extensive development is the future development of enterprises powerful boosters

Innovation and continuous improvement to enhance marketing management marketing channel construction system, increase efforts to support the agents . Strengthening fine management , improve service chain , enhance market service efforts . Differences based on user demand market segments , improve product user satisfaction. Constantly improve the product chain according to changes in market demand and strategic development needs ,overhead gantry crane increase capital operation and related areas of mergers and acquisitions , rapid expansion of product lines and customer access to resources in order to obtain a strong competitive advantage .

Actively explore overseas markets through a diversified, international road of development , and actively to infrastructure demand in emerging countries with economies expand markets, to further establish and improve the products and service chain , enhance corporate competitiveness in international markets .

Lifting machinery and other industries need to support a large number of high-quality steel as a raw material

Construction machinery industry leading products including concrete machinery, road construction machinery, mining machinery,overhead gantry crane piling machinery, lifting machinery and wind power equipment such as a full range of products. Wide range of products in the industry are the need to support a large number of high-quality steel as raw material.

Iron and steel industry as excavators, rollers, rotary drilling rig, loaders,  jib crane  , concrete pumps and other construction machinery products are the main suppliers of raw materials, it is necessary to strengthen inter-sectoral cooperation, and promote the healthy development of the two industries, in order to achieve win-win situation. On the one hand, the construction machinery industry can help the steel industry to digest excess capacity; the other hand, the quality of construction machinery high demand for steel products, iron and steel enterprises can promote technological innovation to improve steel quality, so as to promote the sound development of the industry.

In this regard, some suggestions: First, the establishment of an information exchange platform, to strengthen inter-industry exchanges. Formed steel production development and construction machinery industry, seamless steel demand information; establish regular inter-industry discussion and consultation mechanisms, thematic studies on major issues, joint development of the industry to address the constraints of the problem.

Second is to strengthen industry research, providing valuable consulting services. Integration of two industry-related information, including changes in the steel market, steel, construction machinery industry demand for construction machinery enterprises and steel companies, providing a valuable reference information services.

Three is to guide the steel industry, engineering machinery enterprises to strengthen cooperation and establish a substantive strategic partnership in steel pretreatment, processing,Steel crane distribution and other areas of mutual shareholding, forming a true strategic alliance. Joint research and design, regular exchange of visits, and timely information about construction machinery enterprises demand for steel products, steel products quality problems feedback, so that mutual support and joint development.

Fourth is to strengthen go out and work together to develop overseas markets. Steel industry can bring in terms of going further develop the overseas market of construction machinery.

Chinese tower crane continuously enhance international competitiveness.

Since the 2008 financial crisis, the U.S. and European markets to drop sharply; And thanks to the accelerated process of urbanization in China, China tower  hoist gantry crane  market ushered in a rapid growth phase. At present, China has more than 400 tower crane manufacturer, can produce more than 100 kinds of models of the tower crane, to achieve annual sales of 100,000 units.

Domestic tower structural analysis of the product gradually applied accurate calculation method, by the computer to the tower body parts for strength, stiffness, stability and overall stability calculations, to enhance the precision and design capabilities. Control systems, PLC systems, transformation and frequency conversion stepless speed, fault self-diagnosis monitoring, field bus, remote control and other technology has been in the tower  Steel crane  has been widely applied to improve tower crane performance and security. Basic research, the strength of enterprises, the construction of a complete laboratory, through the new technologies, new structures for quantitative analysis and assessment, improve the reliability of the tower crane.

Chinese tower crane manufacturing industry chain has been formed and matured, the quality has reached the international advanced level, while foreign companies tower crane products are basically localized. Meanwhile, the Chinese tower crane industry independent innovation capability by leaps and bounds. Chinese tower crane export areas more than 144 countries and regions, only 2012 exports to more than 300 million U.S. dollars. China has become the world tower crane tower crane indispensable part.

Particularly the European Union through the international industry standard tower crane in-depth research, to enhance the industry's in-depth understanding of the tower crane, thereby increasing the level of the overall design of the tower crane, the Chinese tower  overhead gantry crane  product performance and security in Europe and America market access threshold.

Southeast ---- Chinese construction machinery exports popular area

In 2012, the Chinese people in Southeast Asia have a new understanding of its not because of the tension between the Philippines,jib crane Southeast Asia and Japan is not because the steel market of the dispute, but along with housing construction, roads, power plants and other infrastructure projects continue to be launched Southeast Asia's rapid economic growth, China has become a hot spot for exports of construction machinery. If the world economy are strong, and Southeast Asian markets may not be so eye-catching. The face of the European debt crisis, the Spanish real estate bubble in the entire world economy cope with the Depression, when the sudden emergence of Southeast Asia,overhead gantry crane I believe, this is not just Chinese construction machinery enterprises, "cornucopia", is the world of construction machinery enterprises competing to compete in the new battlefield.
Southeast Asia, Southeast Asia, appeared late in World War II a new area name, owner, including Vietnam, Laos, Cambodia, Thailand, Myanmar, Malaysia, Singapore, Indonesia, Brunei, the Philippines, East Timor, May 20, 2002, democratic Republic of Timor-Leste was formally established in 11 countries,Steel crane with an area of about 4,570,000 square kilometers, a population of about 560 million. Is one such area, has become a Chinese construction machinery exports popular area.

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.

Chinese tower crane favorable factors and constraints coexist

  In recent years, China tower crane export volume increased, the quality has been improved. But its development is still a lot of constraints, in particular those affecting China tower  hoist gantry crane  for further export. Chinese tower crane exports significantly favorable factors: one is the Chinese tower crane short lead times, low price; hand in recent years, China tower crane export development quickly; third aspect is that China has strengthened lifting machinery industry development strategy and the overall planning; Fourth, some tower crane manufacturers have formed the core competitiveness of enterprises; Fifth, accelerate the establishment of industry self-regulatory organization coordinating mechanism. Strengthen the product into the "mainstream market" certification.
     Chinese tower crane development has two constraints:
     A: Chinese tower Steel crane  in brand building requires further efforts, in particular with international companies compared to similar products there are still some gaps.
     Two: service issues. Chinese tower crane training local agents of multinational enterprises and users obviously inadequate, some less able to service agents. Agents as a bridge connecting manufacturers and users, to promote the prosperity and development of the tower  jib crane  industry plays an extremely important role and should actively promote and improve after-sales service system agents.
     Three: people-oriented Chinese enterprises safety awareness, service consciousness lags far behind developed countries. Some warning signs pasted improper location, not a security warning; various protective facility design and set up either poor, unsightly appearance.bridge crane Such problems are often caused because of safety consciousness, and it does not require too much cost solution.

Gantry crane linkage console operating instructions

   bridge gantry crane   and other mechanical transmission parts mounted on the upper part of the hood enclosure, the drive mechanism is divided into single lever linkage control mechanism, grab double handle control mechanism, main and auxiliary hook double handle control mechanism, single handle and single handle control mechanism level control mechanism. Lever movement spur gears are used camshaft. Controllers are vertical layout camshaft, transmission part of the pivot bearing all in order to reduce the power loss.
        Gantry crane joystick is spherical. To avoid vibration and accidental collision because the  overhead gantry crane  control mechanism malfunction, the handle with zero self-locking devices. Composed by the two hemispheres of the handle up and down, only to mention Woxia hemisphere can leave the handle zero position actuator.
       Leave the zero position when the handle can loosen the lower hemisphere will continue to operate. If you often use reverse parking brake, feel manipulated inconvenience  hoist gantry crane, can be re-instituted the lower hemisphere handle clockwise, so that the lower hemisphere fixed at lifting position, so zero self-locking device does not work. Six agencies under the rear handle with the zero-touch self-locking device.
       Gantry crane positioning ratchet 3 mm thick steel plate stamping of, and after treatment to obtain a higher wear resistance. There are six on the red ratchet positioning holes, positioning screws into the holes in different positions, you can determine the number of stalls joystick. In the left and six-speed range, the number of stalls can be arbitrarily selected. Positioning ratchet spring force can be adjusted, so that you can depending on the circumstances, in the sub-file clear premise,Steel crane adjust the ratchet spring force so that the handle control force within the permitted range.

Several major categories of cranes

Cranes different ways depending on the installation can be divided into
    1, truck cranes
    Truck  Steel crane   the crane mounted on the chassis of the vehicle on the general or special low disk performance is equivalent to the total weight of the same vehicle truck, road vehicles comply with the technical requirements, which can be on the road in all kinds of passage. Such cranes generally available, and get off two control room, legs stretched out operations necessary to maintain stability. From the weight of a large range, from 8 tons to 1,000 tons, the chassis number of axles, from 2 to 10. Is the largest output, the most widely used type of crane.
    2, the tire crane
    Lifting part of the installation in a special crane chassis of a pneumatic tire. Combined with an engine on and off, speed is generally not more than 30KM / H, vehicle width is wider, it should not travel long distances on the highway. Has no legs and hoists with lifting function for garages, docks, construction sites and other places with limited movement distance hoist operation.
    3, rough terrain cranes
    Developed in the 1970s as a crane whose lifting crane tires similar function can also be performed without legs and hoists with lifting. The difference is the form and structure of the chassis chassis structure by a unique brought improved running performance. Such  overhead gantry crane  are mounted on the chassis engine, the chassis has two axles and four large diameter off-road tread tires. Four wheel drive wheels and steering wheel are when the muddy uneven transfer station on the site, the four wheels to transmit power, that four-wheel drive to improve through the muddy ground and uneven road capabilities. When on a flat surface at a faster rate when traveling with only two wheels on the front axle or rear axle drive to reduce energy consumption. Random file of the crane, with said four-wheel drive 4 × 4, 4 × 2 represents 4 there are two axle wheels are wheels. The models suitable for small venue operations. Enabling continuous infinitely variable, in the case of road resistance mutation does not turn off the engine, and thus greatly facilitates the driver's operation. The rough terrain cranes can be a performance extended, powerful and flexible tire cranes.
    4, all-terrain crane
    Is a combined truck cranes and rough terrain cranes characteristics of high-performance products. It can not only transfer as fast as cranes, long distance running, but also to meet in a narrow and bumpy or muddy pitch on the job requirements, namely traveling speed, multi-axle drive, all-wheel steering, three kinds of steering mode from the ground gap, high climbing ability, you can do leg lifting and other functions, is a very promising product. But the price is higher, use and maintenance require a higher level.
5, special cranes
    To accomplish a specific task and the development of special cranes.bridge crane For example: for the mechanized implement tactical and technical safeguards used, mounted on armored vehicles in off-road vehicle or lifting wheel rescue vehicle; to deal with road traffic accidents wrecker, etc., fall into this category.

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.

Overhead crane operation safety rules and safety technology

 1-ringing from the car. From the car to a smooth, steady levels of acceleration.
 2, first class hanging objects, should the goods hanging from the ground 0.5m, then down, in order to test the reliability of the brake, then normal operation.
 3, prohibits overload operation, the estimation is unclear or near the rated load of the goods available two files try hanging. Two hanging file can not afford, and then not use direct lifting high gear. 4, prohibiting oblique hanging, stayed.
5, lifting goods, prevention of sudden lifting, when the rope nearly straightened (taut), to adjust the size of the car's position while lifting one side, to prevent oblique hanging. Similarly, the landing should look at what manner, in order to ensure a smooth cargo.
6 to prohibit lifting buried in the ground, the condensation in the device relative to the ground and the vehicle cargo collusion.
7, hoist gantry crane  operation, to prevent the hook or other lifting a greater swing. Such drivers should be proficient in the "steady hook technology." "Steady hook technology" is that when the hook travel pendulum swing back when the most significant yet, the trolley (cart) to hook swing tour with the most significant step in the direction to offset hook swing back, giving the hook stable.
8, cranes lifting goods banned from the person's head over, lifting goods prohibited to stand on. Lifting should follow the specified channel, more than 0.5m above the ground objects, but not higher than 1.5m.
9, the driver in the job following shall send a signal (-ringing):
(A) lifting, falling cargo, starting size car;
(2) cranes from blurred at passed, to a continuous-ringing;
(3) Cranes in the same layer or another layer close to the cross inside another crane;
(4) when lifting cargo close to personnel;
(5) In other emergency situations
10 cranes in the normal operation of the process, prohibit the use of emergency switches, limit switches, and other means to fight against car parking.
11 cranes in operation prohibition overhaul.
12, prohibit cargo cranes hanging in the air long-term stay. Crane hanging goods, persons linked to prohibit drivers and leave work.bridge gantry crane 13, loading and unloading of container or other cargo should pay attention to:
(1) check whether the packaging is solid and strong lifting symbols
(2) linked to withdraw all personnel before lifting carriage
(3) handling a large plate or cutting edge of the workpiece, use special clamps or special tools. Wire rope lifting and hanging objects must be in the rope between the pad to the pad material.
14, a significant drop in voltage or in the case of electricity ruin, you must disconnect the main switch, pull all the controllers to zero.
15, a sudden failure of the brake lifting mechanism emergency measures. When found defective brakes,Steel crane a warning signal is issued at the same time, playing against car, pull the lift controller to the appropriate grade, repeated use of this means to size car to a safe location, and then lower cargo.
If the brakes fail while lifting mechanism did not work, immediately turn off the cab master switch, the brake solenoid power, brake brake.
16, open operation, when the wind is greater than six or more, you should stop the operation.

Connecting bolt fatigue, loose lead to accidents

Construction machinery and equipment under JG/T5057.40-1995 high strength fasteners Standard: high-strength bolts, nuts, dismounted again after use, generally not more than twice.hoist gantry crane Remove the bolt and the nut must be free of any damage, deformation, slip teeth, missing teeth, rust, screw roughness changes in the larger phenomenon. The actual use of the user can do very little, but must pay attention to strengthening the inspection of high strength fasteners, fastening, maintenance, and periodic replacement, to avoid mix.

Pin shedding caused the accident

a, cotter pin traverse cut off the trigger pin
b, the installation does not install or replace the cotter pin with pliers wire
c, do not install the platen or cotter pin that will pin and structural welding; (pin weldability due to the difference in the shock impact is very easy to open welding,overhead gantry crane causing the pin to fall off.)
d, Shaft damper spring pad or fastening bolts without tightening is not strong long-term vibration and fall off,Steel crane do not work cause the pin off the platen
e, triangular baffle arm joints deformed due to repeated removal or open solder, lead off boom pin.

Poor working conditions, control of overhead crane accident

Some of metallurgical enterprises, mining enterprises, machinery manufacturing enterprises,  hoist gantry crane  operating environment is very harsh. As smoke from various smelting furnace; various pneumatic, electrical machinery, machinery roar; addition of sand, hit the dust and noise venue box; annealing, water blasting operation, water vapor, etc., tend to make the day truck drivers operating in a inaudible, invisible harsh environments. In this condition occurs, "roll over" accident, the accident has happened often, resulting in serious consequences, the driver can be aware of. In order to prevent "over volume" accidents, the best solution is to install limit alarm device. I had a few years ago where the business case in the fight, water blasting site running 17 # day vehicles designed and installed such devices. Detailed control over volume process that  Steel crane  in operation, when the hook set up, once the carom limit cross-foot (regardless of what causes "roll over", hooks groups are bound to the first strike against the corresponding horizontal ruler or other limit switches normally closed off within an indirect action part), horizontal ruler starts at the limit lifted, resulting in limit switch normally closed off at the same time, with linkage alarm device for closing the normally open points, electric horn sounded, drivers will inevitably perceive, immediately take emergency control measures, you can avoid the "roll over" accidents. The car previously occurred almost every year "over volume" accident, since the installation of such a warning device, has been unharmed. Such other types of alarm limits appropriately improved control system, can be used, and in the non-concentrated smoke, loud noise  gantry crane  working environment is also necessary to install an alarm device in order to achieve safety. Limit alarm device schematic diagram Note: This circuit can protect the disk from the main circuit over current relay coil bottom to take power, but also through the volume lighting, bells take power with isolation transformer. Small power electric horn or bell installed in the cab, you can use motorcycle suspension cables or spare power supply cable line two. Limit switch with L × 10-31 type limit switch, which is still connected normally closed limit circuit, normally open alarm circuit connection.

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.

Analysis of overhead crane safety inspection

In order to ensure the safe operation of  overhead gantry crane ,  the crane during operation the need for some security routine examination, it is recommended to be checked as follows:
    1. Ensure lifting height limiter, travel limit switch and the interlock mechanism normal performance, safety and reliability.
    (2) meet the safety requirements of the major components: opening increases less than 15% of the original size, torsional deformation of less than 10%; plate hook bushing wear less than 50% of the original size, plate hook spindle wear less than 5%, no peeling, burrs, welding; hook hanger and pulleys no obvious defects; wire rope surface abrasion, corrosion, less than 40% of the diameter of the wire, broken wire in a twisting pitch of less than 10% of the total number of wires, no breakage, no significant thinning, no core prolapse, dead twisting, extrusion, annealing, burning phenomenon.
    3  Steel crane  wire rope end connections and fixed clamp, plate, wedge block connection intact, no loosening, plate no less than two, no less than three clips. Roll without cracks, connected and fixed without loosening; cylinder wall wear 20% less than the original wall thickness;
    4 safety volume of not less than two laps, drum and rope diameter ratio meets the requirements. Balance wheel fixed intact, wire rope shall conform to the requirements. Brakes no cracks, no loose, no serious wear, brake clearance is equal on both sides of the right size, there is sufficient braking force, brake band wear less than 50% of the original thickness.
     Through the  bridge crane  safety routine inspection, to prevent accidents, reduce equipment accidents, improve equipment operation rate, lower maintenance costs etc. played a significant role.

Large crane erection Technical Guidelines for Safety instructions

      Universal gantry  Steel 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 bridge 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.