a large cranes overhead gantry crane, the structure of beams and columns was "door" shape, deliberate move on the track, starting with a larger weight. Currently shipyards,Bridge crane container yard cranes and divided into two types, namely, rail-mounted container cranes (RMG) and rubber-tyred cranes (RTG). overhead gantry crane rail-mounted container cranes that, Overhead bridge crane with energy saving, high reliability, lifting capacity, small maintenance workload, easy to automate operation. But its biggest drawback is inconvenient to shift position.
overhead gantry crane is mainly composed of cylindrical wheels, bumper, brake blocks, wire rope, lifting hooks, cab, reducer,rail mounted gantry crane pulley casting, casting reel, electric motors, electronic control equipment consists of the following components.
After rotating overhead gantry crane hook, wire rope hook on the kink together, this time can no longer be landing hook operation, or they may make one of the Rope damaged by excessive force, you can take the following approach:
(1) Under heavy ground is not high and the performance permit crane, gantry crane with luffing methods can put weight down, crane hoist then put a positive spin hook.
(2) If the weight has been lifted high off the ground, you can only think of a way close to the surrounding buildings, or other person gantry crane hanging cage to spin positive hook.
(3) In the event the hook rotated, the rope should be released within the gantry torque, the specific method is: Bridge crane to hook into the ground and untied the rope fixed end, in accordance with the rotation of the hook m multiplied by the number of turns of wire rope n is the number of matches cardinality k (as the case may increase or decrease), shares in the reverse direction by rope twist, turn the end of the rope to release torque, and then install the fixed end. Boom will play a maximum elevation of lifting machinery, repeated several times to check the effect of hook ups and downs, you can repeat the above steps until the hook is stable.
bridge gantry crane
2014年7月21日星期一
2013年9月8日星期日
Electric double girder crane is composed of what conditions?
Now with electric double girder
bridge gantry crane on the market is that people pay greater attention to the product, along with its reputation in the market, so good, along with its development speed so fast, the effect is so good, so people also prefer to use their in the course of its use are generally more comfortable, which is a feature of its relatively large, in the course of its use, there are many companies on the electric double girder cranes are more optimistic, and think it is useful potential for development, so its frequency of use is relatively high, so now is the electric double girder crane what conditions constitute it?
1 electric
As the electric double girder overhead bridge crane certainly constitutes the most important condition is electric, and generally in the course of its electric operation is automatically operated, generally able to automatically operate product is loved by a lot of people, under normal circumstances so much loved by the odds are not great, unless it is one of their more optimistic or is it in the market has developed over the years, and only in this case will have electric products, so that the electric products on the market is are more useful.
2 double beam
General Electric double beam crane for its use in the process often comes in many forms, the forms, the more the more it is advantageous for the product, so that the more the more favorable product better able to survive in the market this is inevitable, so the electric double girder overhead gantry crane is more of a product to make it feel comfortable.
This is some of the electric double girder crane constitute conditions.
1 electric
As the electric double girder overhead bridge crane certainly constitutes the most important condition is electric, and generally in the course of its electric operation is automatically operated, generally able to automatically operate product is loved by a lot of people, under normal circumstances so much loved by the odds are not great, unless it is one of their more optimistic or is it in the market has developed over the years, and only in this case will have electric products, so that the electric products on the market is are more useful.
2 double beam
General Electric double beam crane for its use in the process often comes in many forms, the forms, the more the more it is advantageous for the product, so that the more the more favorable product better able to survive in the market this is inevitable, so the electric double girder overhead gantry crane is more of a product to make it feel comfortable.
This is some of the electric double girder crane constitute conditions.
Accelerate the high-end engineering machinery and equipment R & D capabilities
Current by the introduction of advanced technology , high-end products still rely on imports of China's equipment manufacturing industry is facing the harsh reality . High-end machine tools , high-end engine , high-end instrumentation and control systems , need from abroad .bridge gantry crane Among them, 90% of imports of high-end CNC machine tools , CNC system 95% of imports , imports 70 percent of instrumentation . In the field of infrastructure components for high-end CNC machine tools supporting 70% of high-end features need to import large construction machinery hydraulic parts required for all imports above 30MPA , speed of 200 km above the gear box , 2.5MW wind turbine gearbox above , large-scale coal gear box , high speed train brakes, large shield machine electro-hydraulic drive unit , almost all imports . Although in terms of marine diesel engine with advanced foreign enterprises to develop a joint venture , co-production , but the key core technology and brand still rests in the hands of foreign enterprises ,overhead bridge crane not to get rid of "wage " type of processing and manufacturing position.
WangRuiXiang stressed that China's equipment manufacturing industry , the most important thing is to accelerate independent research and capacity building. Countries on the one hand to find a way to give policy support, on the other hand to integrate resources , technology research organization . "At present , China's research institutes strength is still very fragmented, should think of ways to integrate focus areas , universities should also consider how to get involved in. I believe the strength of several organizations together, our country will be able to gradually break through the technical bottleneck breakthrough high-end equipment manufacturing monopoly status of foreign enterprises , and gradually form a high-tech for the lead, in the value chain and core aspects of the industry chain , to enhance the core competitiveness of the industry 's high-end equipment manufacturing industry . "
Similarly, the CPPCC National Committee, the National Machine Group Co., Ltd. Chairman Ren Hongbin also pointed out that the current level of China's equipment manufacturing industry, compared with foreign countries there is a big gap that needs some investment and policy support , the level of development of high-end equipment manufacturing industry enhance up . High-end equipment to change our international competitiveness is not strong , a higher degree of external dependence situation. The National People's Congress , Chery Heavy Industries Co., Ltd. General Manager Wang Jinfu it is said that "high-end equipment manufacturing, to big to say , a symbol of a country's core competitiveness , involving the country's economic and national security ; talked to the small , many industries and enterprises related to the survival and development . " acceptance , including " China joint Business News ", including a media interview, said that over the past decade , the rapid development of China 's overhead gantry crane industry , China has become a veritable equipment manufacturing country , but also not the equipment manufacturing powerhouse ; but to achieve " from large to strong " dream, must enhance the independent innovation capacity, accelerate the development and promotion of independent high-end equipment manufacturing industry .
WangRuiXiang stressed that China's equipment manufacturing industry , the most important thing is to accelerate independent research and capacity building. Countries on the one hand to find a way to give policy support, on the other hand to integrate resources , technology research organization . "At present , China's research institutes strength is still very fragmented, should think of ways to integrate focus areas , universities should also consider how to get involved in. I believe the strength of several organizations together, our country will be able to gradually break through the technical bottleneck breakthrough high-end equipment manufacturing monopoly status of foreign enterprises , and gradually form a high-tech for the lead, in the value chain and core aspects of the industry chain , to enhance the core competitiveness of the industry 's high-end equipment manufacturing industry . "
Similarly, the CPPCC National Committee, the National Machine Group Co., Ltd. Chairman Ren Hongbin also pointed out that the current level of China's equipment manufacturing industry, compared with foreign countries there is a big gap that needs some investment and policy support , the level of development of high-end equipment manufacturing industry enhance up . High-end equipment to change our international competitiveness is not strong , a higher degree of external dependence situation. The National People's Congress , Chery Heavy Industries Co., Ltd. General Manager Wang Jinfu it is said that "high-end equipment manufacturing, to big to say , a symbol of a country's core competitiveness , involving the country's economic and national security ; talked to the small , many industries and enterprises related to the survival and development . " acceptance , including " China joint Business News ", including a media interview, said that over the past decade , the rapid development of China 's overhead gantry crane industry , China has become a veritable equipment manufacturing country , but also not the equipment manufacturing powerhouse ; but to achieve " from large to strong " dream, must enhance the independent innovation capacity, accelerate the development and promotion of independent high-end equipment manufacturing industry .
2013年9月6日星期五
Type of crane lifting limiter
overhead bridge crane overload protection devices according to their different functions can be integrated into automatic stop-and-two. Classified according to their institutional forms, there are two kinds of electrical and mechanical type.
Auto-stop type. It refers to lifting the quality of more than nominal weight, they can stop the crane to unsafe direction (lifting, outriggers, drop arm, etc.) continues to operate, while allowing the crane to a safe direction movements.
Integrated lifting limiter. When lifting the quality is reached nominal weight of about 90% can be audible or visual alarm signal, lifting weight of more than nominal weight, they can stop the overhead gantry crane unsafe direction to continue action, concurrent sound and light alarm signals, and allow the crane to a safe direction movements.
Electric-type lifting limiter. Refers to mechanical energy to electrical energy conversion between, to achieve protection. That the detected amount of the load and other mechanical converted into corresponding electrical signals, and then zoom, comparing, computing and processing. Habits become electronic, electric, electromechanical and microprocessor-based products are of this.
Mechanical load limiter. Refers to the conversion of mechanical energy and switch between fit to achieve protection.bridge gantry crane Machinery products is relatively simple, using leverage, eccentric, spring or hydraulic system to detect load, through limit switch (control valve) the product movements.
Auto-stop type. It refers to lifting the quality of more than nominal weight, they can stop the crane to unsafe direction (lifting, outriggers, drop arm, etc.) continues to operate, while allowing the crane to a safe direction movements.
Integrated lifting limiter. When lifting the quality is reached nominal weight of about 90% can be audible or visual alarm signal, lifting weight of more than nominal weight, they can stop the overhead gantry crane unsafe direction to continue action, concurrent sound and light alarm signals, and allow the crane to a safe direction movements.
Electric-type lifting limiter. Refers to mechanical energy to electrical energy conversion between, to achieve protection. That the detected amount of the load and other mechanical converted into corresponding electrical signals, and then zoom, comparing, computing and processing. Habits become electronic, electric, electromechanical and microprocessor-based products are of this.
Mechanical load limiter. Refers to the conversion of mechanical energy and switch between fit to achieve protection.bridge gantry crane Machinery products is relatively simple, using leverage, eccentric, spring or hydraulic system to detect load, through limit switch (control valve) the product movements.
2013年8月30日星期五
Cranes rising limit position limiter
Up limit position limiter is lifting one important safety device. When hoisting motion, the spreader in working height range. At the maximum working position, the spreader with the top of the supporting mechanism (such as a frame or a small
bridge crane, etc.) should have a certain distance. The specific size of this space, the driver is more difficult to master at work, coupled with inevitable negligence in work. Therefore, if the installation does not increase the limit position limiter or limiters failure, work, may occur to the upper supporting structure spreader top, and rising operation of the drive system lifting spreader situation continues,hoist crane resulting in wire breakage, and to spreader fall accidents.
Adopt and maintain its upper limiter work effectively to prevent similar incidents from happening, so "crane safety regulations" in the states: all power-driven crane, its lifting mechanism (including main and auxiliary hoisting mechanism), should be installation rising limit position limiter.
Up limit position limiter basic principle is the separation of a drive by the lifting motion action to trigger an electrical switch, resulting in increased transmission system to stop working,overhead bridge crane and thus play a protective role. The common form of hammer and screw two.
Adopt and maintain its upper limiter work effectively to prevent similar incidents from happening, so "crane safety regulations" in the states: all power-driven crane, its lifting mechanism (including main and auxiliary hoisting mechanism), should be installation rising limit position limiter.
Up limit position limiter basic principle is the separation of a drive by the lifting motion action to trigger an electrical switch, resulting in increased transmission system to stop working,overhead bridge crane and thus play a protective role. The common form of hammer and screw two.
2013年8月29日星期四
Chinese crane industry product quality status
In recent years, in order to meet market demand, domestic enterprises constantly adjust product structure, improve the level of product technology and continuously improve product quality, to provide users with high-quality products, but still mainly targeted at the low-end market, compared with foreign construction
overhead bridge crane quality there are still large gaps, mainly reflected in the following aspects:
(1) product design sophistication uneven
Domestic construction cranes in appearance compared with foreign products, humane, product reliability, ease of installation, detail design some gaps. Domestic construction crane in appearance, humane, reliability, and other fine design mixed.
(2) the level of technology and assembly technology varies greatly
Precision-made overhead gantry crane materials, the appearance of coating, the flatness of the main cover and key parts of the weld and assembly technology level compared with foreign products have a certain gap.
Manufacturing and assembling technical level varies greatly, weld appearance of rough irregular, paint quality, but off, poor paint adhesion and corrosion resistance.
(3) the stability of the product quality is poor
Stability and quality of domestic parts larger than the gap with foreign products, affecting product life, such as the hydraulic system leakage, abnormal noise; electrical component aging, poor contact, malfunction; institutions like oil spills, abnormal sound, easy to maneuver , unreliable; bridge box category oil spills, leaks, broken teeth, badly operated; chambers and exterior parts leaking weld cracking,bridge gantry crane sealing off the aging and so on. Such as engine life abroad as 8000h, while China only 3000h; foreign service life of the hydraulic cylinder 100 to 200 million, while China is only 60 to 80 million times.
(1) product design sophistication uneven
Domestic construction cranes in appearance compared with foreign products, humane, product reliability, ease of installation, detail design some gaps. Domestic construction crane in appearance, humane, reliability, and other fine design mixed.
(2) the level of technology and assembly technology varies greatly
Precision-made overhead gantry crane materials, the appearance of coating, the flatness of the main cover and key parts of the weld and assembly technology level compared with foreign products have a certain gap.
Manufacturing and assembling technical level varies greatly, weld appearance of rough irregular, paint quality, but off, poor paint adhesion and corrosion resistance.
(3) the stability of the product quality is poor
Stability and quality of domestic parts larger than the gap with foreign products, affecting product life, such as the hydraulic system leakage, abnormal noise; electrical component aging, poor contact, malfunction; institutions like oil spills, abnormal sound, easy to maneuver , unreliable; bridge box category oil spills, leaks, broken teeth, badly operated; chambers and exterior parts leaking weld cracking,bridge gantry crane sealing off the aging and so on. Such as engine life abroad as 8000h, while China only 3000h; foreign service life of the hydraulic cylinder 100 to 200 million, while China is only 60 to 80 million times.
2013年8月27日星期二
Bridge crane related presentations
Here to tell you
overhead bridge crane related issues, so that we know more about:
Overhead bridge crane is the bridge in orbit a bridge crane. Bridge crane bridge laying on both sides along the elevated tracks run vertically, lifting trolley along the track on the bridge laying sideways to form a rectangle scope of work, you can take advantage of the space under the bridge lifting materials, not hampered by ground equipment.
Bridge crane is widely used in indoor and outdoor warehouses, factories, docks and open storage yard, etc.. hoist crane can be divided into ordinary, simple beam bridge crane bridge crane and metallurgical dedicated three.
General overhead cranes generally lifting trolley bridge operating agencies, bridge metal structures. Lifting trolley and the hoisting mechanism, trolley run institutions and small frame of three parts.
Lifting mechanism includes a motor, brake, reducer, drum and pulley. Motor through reducer, driving drum rotation, so that the wire rope around the drum or from a roll down to lift heavy loads.jib crane Small frame and mounting bracket is lifting mechanism and trolley run institutions and other parts of the rack, usually welded structure.
Overhead bridge crane is the bridge in orbit a bridge crane. Bridge crane bridge laying on both sides along the elevated tracks run vertically, lifting trolley along the track on the bridge laying sideways to form a rectangle scope of work, you can take advantage of the space under the bridge lifting materials, not hampered by ground equipment.
Bridge crane is widely used in indoor and outdoor warehouses, factories, docks and open storage yard, etc.. hoist crane can be divided into ordinary, simple beam bridge crane bridge crane and metallurgical dedicated three.
General overhead cranes generally lifting trolley bridge operating agencies, bridge metal structures. Lifting trolley and the hoisting mechanism, trolley run institutions and small frame of three parts.
Lifting mechanism includes a motor, brake, reducer, drum and pulley. Motor through reducer, driving drum rotation, so that the wire rope around the drum or from a roll down to lift heavy loads.jib crane Small frame and mounting bracket is lifting mechanism and trolley run institutions and other parts of the rack, usually welded structure.
2013年8月25日星期日
China the status of tower cranes
Chinese tower crane began in the 1950s. Looking at the 60-year history, China tower crane industry from scratch,overhead bridge crane from small to large, and gradually formed a relatively complete system and more complete spectrum, tower crane industry has also become China's construction machinery industry the fastest growing one. Today, China has been able to produce 100 kN to 52,000 kN m m tower crane, construction will not only meet the domestic demand, but also are exported to all over the world, especially in small quantities are exported to European and American countries and regions. China has become the world's largest producer of tower cranes.
A status quo
Through 60 years of efforts, China tower bridge gantry crane industry in the industrial scale, independent innovation, restructuring, etc. have achieved remarkable results.
(1) industry continues to expand rapidly.
Since the 1990s, China tower crane industry has been rapid development, especially in recent years, research and development capabilities continue to increase, the various forms of tower crane product spectrum increasingly sophisticated, the tower crane production and sales continued to climb, China has become the world's civil tower crane largest producer, is the world's largest tower crane use of power.
2007 China's total sales of tower crane 31020 units, compared with 2006 increased by 59.72%, domestic tower overhead gantry crane holdings exceed 10 million units. Since then China tower crane market has entered a rapid development stage one, as of 2012 the domestic tower crane ownership has more than 300,000 units, with an annual growth rate of over 25%.
A status quo
Through 60 years of efforts, China tower bridge gantry crane industry in the industrial scale, independent innovation, restructuring, etc. have achieved remarkable results.
(1) industry continues to expand rapidly.
Since the 1990s, China tower crane industry has been rapid development, especially in recent years, research and development capabilities continue to increase, the various forms of tower crane product spectrum increasingly sophisticated, the tower crane production and sales continued to climb, China has become the world's civil tower crane largest producer, is the world's largest tower crane use of power.
2007 China's total sales of tower crane 31020 units, compared with 2006 increased by 59.72%, domestic tower overhead gantry crane holdings exceed 10 million units. Since then China tower crane market has entered a rapid development stage one, as of 2012 the domestic tower crane ownership has more than 300,000 units, with an annual growth rate of over 25%.
2013年8月23日星期五
Philippines - construction machinery enterprises export optimistic response
In recent years, the Philippines, construction machinery market is growing, the price competition is fierce.overhead bridge craneoverhead bridge crane In contrast, the Chinese engineering machinery products affordable and fast delivery widely Philippine customers. Philippines is currently under construction and planning of future infrastructure projects are many, the Philippines is also very rich in minerals, nickel ore reserves is 70% of the world's total, and the strength of the Chinese commercial deep penetration of the Philippines, "mining, real estate, aviation industry , infrastructure ...... trekking are the lifeblood of the Chinese control. "
Philippine Trade and Industry officials have said in the beginning of this year, the Philippines will adjust the direction of exports, the export focus from the United States and Europe to China and others have signed a free trade area agreement economies, which are for Chinese exports of construction machinery in the Philippines to create a unique advantage.bridge gantry crane So far, the Southeast Asian countries of China's construction machinery enterprises is definitely an enormous temptation. Infrastructure, agriculture, construction and mining engineering, increasing the demand for construction machinery, whether it is equipment leasing or sale, it is undeniable Southeast Asia is a huge potential market. How can capture the huge potential in Southeast Asia construction machinery market? In addition to utilizing the unique geographical advantages, the price advantage, China's construction machinery enterprises should innovate in an effort to service and quality counterparts,overhead gantry crane meanwhile, should pay close attention to market developments after the Southeast Asian countries, so as to achieve a long history.
Philippine Trade and Industry officials have said in the beginning of this year, the Philippines will adjust the direction of exports, the export focus from the United States and Europe to China and others have signed a free trade area agreement economies, which are for Chinese exports of construction machinery in the Philippines to create a unique advantage.bridge gantry crane So far, the Southeast Asian countries of China's construction machinery enterprises is definitely an enormous temptation. Infrastructure, agriculture, construction and mining engineering, increasing the demand for construction machinery, whether it is equipment leasing or sale, it is undeniable Southeast Asia is a huge potential market. How can capture the huge potential in Southeast Asia construction machinery market? In addition to utilizing the unique geographical advantages, the price advantage, China's construction machinery enterprises should innovate in an effort to service and quality counterparts,overhead gantry crane meanwhile, should pay close attention to market developments after the Southeast Asian countries, so as to achieve a long history.
2013年8月22日星期四
Lifting machinery market is facing a severe test
Universal
overhead bridge crane is currently facing a severe test of the market, production and management more difficult. Since March 2011 until the end of July 2013, China's construction machinery industry has been going on for 27 months running sluggish. This habit over the years grew 30 percent of the industry, some companies grew 100% is also not uncommon in the industry.
In recent years, with the national industrial policy adjustment and industry to accelerate the pace of opening up, construction machinery industry has become no policy barriers perfectly competitive industry, general gantry bridge crane rapid rise of private enterprises within the industry, the international construction machinery giant rapid penetration, the internationally renowned almost all construction machinery company in China to establish wholly-owned, joint ventures, industry competition pattern changed radically.
Compared with foreign enterprises still have a large gap, the competitiveness particularly urgent need to improve international competitiveness, especially in the international construction machinery market, the competitiveness of the very weak, which is our current universal gantry hoist crane construction machinery development pole disproportionate.
Gantry crane in the general market growth down in the case, construction machinery enterprises in order to achieve sustainable and healthy development, we must shift from scale growth of intensive development, hard skills, speed upgrades, really put the focus to enhance the development of quality and efficiency.
In recent years, with the national industrial policy adjustment and industry to accelerate the pace of opening up, construction machinery industry has become no policy barriers perfectly competitive industry, general gantry bridge crane rapid rise of private enterprises within the industry, the international construction machinery giant rapid penetration, the internationally renowned almost all construction machinery company in China to establish wholly-owned, joint ventures, industry competition pattern changed radically.
Compared with foreign enterprises still have a large gap, the competitiveness particularly urgent need to improve international competitiveness, especially in the international construction machinery market, the competitiveness of the very weak, which is our current universal gantry hoist crane construction machinery development pole disproportionate.
Gantry crane in the general market growth down in the case, construction machinery enterprises in order to achieve sustainable and healthy development, we must shift from scale growth of intensive development, hard skills, speed upgrades, really put the focus to enhance the development of quality and efficiency.
2013年8月19日星期一
Lifting type experiment specification methods and ideas expressed in
In theory, the mathematical specification is portrayed things big and small. Let's say lifting ordinary norms of ordinary means of lifting the primary technical parameters, there are many data components, such as the extra weight from the extra lifting moment, span, undulating, height, lifting speed, task level, etc. and so on. In lifting machinery production promised (inclusive type of experiment filed) and type of experiments relating normative documents and technical specifications Speaking of safety norms concept strange strange local intrinsic, common in the experimental project comes to be a broad sense, But in the production promised certificate (or filed notices) expressly refers to the norms of lifting the main parameters. Such as: overhead crane and
bridge gantry crane main hook from the weight of the extra or additional tower crane lifting torque and so on. Expressed in the certificate was intended to simplify the drop type of experiment and forensics unit responsible, to prevent parameter changes slightly type experiments will be carried out and additional items forensics. So, how in the certificate indicates that regulate it? Especially showing double trolley, three car, or more cars, there are not high, ranging from the amount of the main hook condition how to do so? Under normal circumstances, marked a main hook up the extra weight on it, if showing the multi-car and other complex conditions, difficult to accurately express real clear,overhead gantry crane with promise certificate or filed notices on common parameters are not explained, this conditions can mark multiple hook derived by adding extra weight from the total weight of the largest since the additional, specific specific parameters in the type test report and be given clear instructions.
These are special equipment existing regulations, norms, norms for the foundation of the Chinese overhead bridge crane type of experiment specific approach and type of experiment in the production of promise (inclusive type of experiment filed), making use of supervision and inspection carried out in a systematic introductions , discussion, thinking, represent only a small I know and understand, for learning to see, but also expect to send more in the future revision of the specification lifting, linking the actual situation and the existing regulations, standards, norms, in theory, the theory on the type of problem lifting to be completely clear, perfect crane type test criteria together in promoting the legalization of lifting machinery, guidelines, standardized and scientific, standardized process
These are special equipment existing regulations, norms, norms for the foundation of the Chinese overhead bridge crane type of experiment specific approach and type of experiment in the production of promise (inclusive type of experiment filed), making use of supervision and inspection carried out in a systematic introductions , discussion, thinking, represent only a small I know and understand, for learning to see, but also expect to send more in the future revision of the specification lifting, linking the actual situation and the existing regulations, standards, norms, in theory, the theory on the type of problem lifting to be completely clear, perfect crane type test criteria together in promoting the legalization of lifting machinery, guidelines, standardized and scientific, standardized process
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
On the bridge crane electrical maintenance methods and techniques
1 Sensory law: that is through human sense organs, perception fault conditions, access to fault information,gantry crane for failure to make a preliminary judgment. For example: When a failure occurs, we understand clearly to the operator after the failure phenomenon, we can observe through the eyes, to see whether the apparent point of failure, take appropriate measures; failure can also use ear sounds, determines mechanical sound or electrical failure within the electric motor sound, take appropriate measures; smell the smell can also be used to determine whether there element burned, etc.; also hand feeling the temperature of the motor and other components to help us make the right judgments for failure. This method requires crane electrical maintenance personnel to have some experience.
(2) Emergency Law: When we sensory method by using the above still does not as soon as possible after troubleshooting, and production line equipment for a long time do not allow the rest of the case, we will take emergency measures to allow the device to move as quickly as possible. Knowledge of the emergency law in case of emergency interim measures, not long-term use, so when an emergency situation after the disappearance, we have to seriously troubleshoot eliminate failures.
3 test method: in the guarantee does not lead to the failure to expand to the premise, by sending electrical test, repeated observations of the action action mechanism, abnormal, troubleshooting, or help further troubleshooting. (Overhead bridge crane s)
4 voltage method: This is a direct and effective quick way to find an actuating mechanism when the action without action, we can start with a multimeter from the ends of the coil, the coil and the coil individually amount of each component branch voltage, and ultimately to identify the point of failure, troubleshooting.
5 Short Connection: When we find an action element and no action should be action, and this element and in a multi-loop, use a multimeter can not draw accurate conclusions, we can by shorting the coil branch of the element United interlock control components, troubleshooting points.
6 Grounding method: When the branch line has long suspected a break and find the line breakpoint, in case of power failure, the line can be grounded at one end, the other end of the line sequential measurements are also grounded, so as to arrive accurate conclusions.
Several methods can be effective over the complete overhaul of the electrical overhead bridge crane.
(2) Emergency Law: When we sensory method by using the above still does not as soon as possible after troubleshooting, and production line equipment for a long time do not allow the rest of the case, we will take emergency measures to allow the device to move as quickly as possible. Knowledge of the emergency law in case of emergency interim measures, not long-term use, so when an emergency situation after the disappearance, we have to seriously troubleshoot eliminate failures.
3 test method: in the guarantee does not lead to the failure to expand to the premise, by sending electrical test, repeated observations of the action action mechanism, abnormal, troubleshooting, or help further troubleshooting. (Overhead bridge crane s)
4 voltage method: This is a direct and effective quick way to find an actuating mechanism when the action without action, we can start with a multimeter from the ends of the coil, the coil and the coil individually amount of each component branch voltage, and ultimately to identify the point of failure, troubleshooting.
5 Short Connection: When we find an action element and no action should be action, and this element and in a multi-loop, use a multimeter can not draw accurate conclusions, we can by shorting the coil branch of the element United interlock control components, troubleshooting points.
6 Grounding method: When the branch line has long suspected a break and find the line breakpoint, in case of power failure, the line can be grounded at one end, the other end of the line sequential measurements are also grounded, so as to arrive accurate conclusions.
Several methods can be effective over the complete overhaul of the electrical overhead bridge crane.
2013年8月16日星期五
Import and export of engineering and hoisting machinery presented five characteristics
This year, the world is facing economic recession, countries hit by the financial storm environment, the country has implemented the macro-control policies, resulting in resource commodities and labor-intensive merchandise exports fall, but due to national infrastructure continuity and long-term, therefore mainly used for infrastructure construction projects and the demand for lifting a limited impact in the near future.
Meanwhile, the world is facing increasing scarcity of non-renewable resources and food security strategic position valued economic environment, engineering and hoisting machinery in the development of mineral resources and the development of economic activities in the food industry will have its uses, so their needs have greater space for our engineering and hoisting machinery import and export is facing rare opportunities for development,overhead bridge crane import and export trade has shown rapid growth. Engineering and hoisting machinery import and export features:
1 Engineering and lifting the fifth consecutive year export growth rate higher than the growth rate of export of electromechanical products.
Although our engineering and hoisting machinery import and export trade import and export of electromechanical products accounted for the proportion of low, about 2%, but the engineering and hoisting machinery import and export of general trade, processing trade, lower proportion; most export products own brand and cost competitiveness; obtain national policy support, so construction and agricultural machinery with export base and high growth potential.
(2) Engineering and lifting the fourth consecutive year trade surplus.
Engineering and lifting import and export trade deficit before 2004 were started in 2005 to achieve a trade surplus and the trade surplus increased every year. Engineering and lifting a gradual increase product awareness, increase international market share year after year is a major factor in generating trade surpluses. Foreign-invested enterprises and enterprises to innovate products to replace imported products trade deficit into a trade surplus in recent years, another important factor.
3 Engineering and lifting machinery manufacturers of spare parts for global sourcing.
At present, China spare parts industry is still unable to meet the needs of machine manufacturers, especially in the engine, hydraulic systems and other core parts and components. Therefore, some companies have financial strength to recognize their lack of original supply chain, and actively with international top parts suppliers to cooperate to achieve the overall use of global sourcing to enhance the quality, to seize the international market share. Meanwhile, engineering and hoisting machinery parts exports will be more, showing parts manufacturing system into the international trend.
4 Engineering and lifting substantial growth in exports to emerging markets.
In the world economy is not stable, when the majority of developing countries, the situation is not bad, Chinese engineers and overhead gantry crane products are relatively low grade, high cost, have a good market in developing countries is reflected in China to Russia and other CIS member countries, Africa and other developing regions, ASEAN's exports is still rapid growth.
5 Engineering and lifting import and export agency still promoted.
Engineering and lifting with a number of base, technological innovation and strong exports of the main force. These companies have their own brand products, with international leadership and vision to fight international marketing talent, after years of development, has gradually emerged in the international market. But the state of export enterprises decentralized management can not be ignored, most enterprises have business instability,bridge gantry crane inefficient and unable to carry out service and other operating defects. Few export enterprises in the international market to take acts of unfair competition also on the "Made in China" products cause adverse effects. As engineering and hoisting machinery import and export urgent need to establish a sound service system, and in the course of personal safety factors involved, we recommend that an appropriate increase in import and export business of barriers to entry.
Meanwhile, the world is facing increasing scarcity of non-renewable resources and food security strategic position valued economic environment, engineering and hoisting machinery in the development of mineral resources and the development of economic activities in the food industry will have its uses, so their needs have greater space for our engineering and hoisting machinery import and export is facing rare opportunities for development,overhead bridge crane import and export trade has shown rapid growth. Engineering and hoisting machinery import and export features:
1 Engineering and lifting the fifth consecutive year export growth rate higher than the growth rate of export of electromechanical products.
Although our engineering and hoisting machinery import and export trade import and export of electromechanical products accounted for the proportion of low, about 2%, but the engineering and hoisting machinery import and export of general trade, processing trade, lower proportion; most export products own brand and cost competitiveness; obtain national policy support, so construction and agricultural machinery with export base and high growth potential.
(2) Engineering and lifting the fourth consecutive year trade surplus.
Engineering and lifting import and export trade deficit before 2004 were started in 2005 to achieve a trade surplus and the trade surplus increased every year. Engineering and lifting a gradual increase product awareness, increase international market share year after year is a major factor in generating trade surpluses. Foreign-invested enterprises and enterprises to innovate products to replace imported products trade deficit into a trade surplus in recent years, another important factor.
3 Engineering and lifting machinery manufacturers of spare parts for global sourcing.
At present, China spare parts industry is still unable to meet the needs of machine manufacturers, especially in the engine, hydraulic systems and other core parts and components. Therefore, some companies have financial strength to recognize their lack of original supply chain, and actively with international top parts suppliers to cooperate to achieve the overall use of global sourcing to enhance the quality, to seize the international market share. Meanwhile, engineering and hoisting machinery parts exports will be more, showing parts manufacturing system into the international trend.
4 Engineering and lifting substantial growth in exports to emerging markets.
In the world economy is not stable, when the majority of developing countries, the situation is not bad, Chinese engineers and overhead gantry crane products are relatively low grade, high cost, have a good market in developing countries is reflected in China to Russia and other CIS member countries, Africa and other developing regions, ASEAN's exports is still rapid growth.
5 Engineering and lifting import and export agency still promoted.
Engineering and lifting with a number of base, technological innovation and strong exports of the main force. These companies have their own brand products, with international leadership and vision to fight international marketing talent, after years of development, has gradually emerged in the international market. But the state of export enterprises decentralized management can not be ignored, most enterprises have business instability,bridge gantry crane inefficient and unable to carry out service and other operating defects. Few export enterprises in the international market to take acts of unfair competition also on the "Made in China" products cause adverse effects. As engineering and hoisting machinery import and export urgent need to establish a sound service system, and in the course of personal safety factors involved, we recommend that an appropriate increase in import and export business of barriers to entry.
2013年8月15日星期四
Gantry crane in outstretched arms and columns
Calculation
gantry crane arm outstretched limb and pillars lever force, assuming outstretched arms stretched out to the maximum radius of the situation and with the most simple graphical method in order to achieve it. Outstretched arm pillar Weight Weight G1 and G2 assuming distributed in its adjacent section head, load Q forces G1 / 2, as well as cable tension in the extended arm tip synthesized a force on stilts translated into force of these forces, the role of the upper and lower ends of the pillar. By the load force and G2 / 2 (upper and lower), you can make a force equilibrium diagram.
Gantry crane pillar and stretched out arm folded under pressure and the role of Alice.
Gantry crane pillar and stretched out arm,overhead gantry crane particularly for auxiliary crane, mostly made of wood, because wood fold resistance to stress and Alice very good performance.overhead bridge crane Wood Type: cedar or pine.
If the outstretched arms made of lattice beams and columns line, then the interface is synthesized by four L-shaped square, which is surrounded in a plane iron flat iron or L-phase connection.
In order to create a simple, transport facilitation, stretched out arm can be divided into two, and make it part of the length of the outstretched arm with the required total length of the pillar is also synthesized by the three parts, in which inter-segment length can be changed.
Gantry crane pillar and stretched out arm folded under pressure and the role of Alice.
Gantry crane pillar and stretched out arm,overhead gantry crane particularly for auxiliary crane, mostly made of wood, because wood fold resistance to stress and Alice very good performance.overhead bridge crane Wood Type: cedar or pine.
If the outstretched arms made of lattice beams and columns line, then the interface is synthesized by four L-shaped square, which is surrounded in a plane iron flat iron or L-phase connection.
In order to create a simple, transport facilitation, stretched out arm can be divided into two, and make it part of the length of the outstretched arm with the required total length of the pillar is also synthesized by the three parts, in which inter-segment length can be changed.
Gantry crane safety inspection project
overhead bridge crane safety inspection in order to ensure the safe operation of the crane during operation must perform some routine security check items and points are as follows:
1, lifting height limiter, travel limit switch and the interlock mechanism normal performance, safety and reliability.
2, the main components meet the safety requirements: 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. Hanger hook and pulley no obvious defects. The surface of the wire rope wear,bridge gantry crane corrosion is 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 thinning, no core prolapse, dead twisting, extrusion , annealing, burning phenomenon. Rope end connections and fixed clamp, plate, wedge block connection intact, no loose, plate no less than two, no less than three clips. Roll no cracks, connections, fixed no loose; cylinder wall wear less than 20% of the original thickness; secure 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,Steel crane 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 security door cranes routine inspection, to prevent accidents, reduce equipment accidents, improve equipment operation rate, lower maintenance costs etc. played a significant role.
1, lifting height limiter, travel limit switch and the interlock mechanism normal performance, safety and reliability.
2, the main components meet the safety requirements: 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. Hanger hook and pulley no obvious defects. The surface of the wire rope wear,bridge gantry crane corrosion is 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 thinning, no core prolapse, dead twisting, extrusion , annealing, burning phenomenon. Rope end connections and fixed clamp, plate, wedge block connection intact, no loose, plate no less than two, no less than three clips. Roll no cracks, connections, fixed no loose; cylinder wall wear less than 20% of the original thickness; secure 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,Steel crane 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 security door cranes routine inspection, to prevent accidents, reduce equipment accidents, improve equipment operation rate, lower maintenance costs etc. played a significant role.
2013年8月14日星期三
Bridge crane power outage causes and how to deal with
overhead bridge crane in use for some reason or sometimes unexpected power outage situation, then due to inertia, the crane can not be stopped immediately, is likely to be damaged workpiece and the machine, causing the accident, therefore, occurred off the bridge crane electrical phenomenon should pay attention to timely troubleshooting, to return to normal.
A traveling crane causes power outage
Crane main contactor coil power is due mainly to the following aspects:
(A) the vibration generated when the work carts make Waterloo rail combined with strong, power supply problems, causing the main contactor main contacts and normally open auxiliary contact and disconnect the main contactor coil failure and self-locking cause power outages.
(2) Waterloo local poor contact, resulting in a certain overhead crane rail line to the instantaneous phase, if the missing phase which happens to be connected to the control line, it will make the main contactor coil power, self-lock failure, even due to inertia glide bridge gantry crane poor contact at the re-energized after the main contactor coil is also unable to pull, you must re-press the start button.
(3) lifting heavy vibrations generated when the main contactor is not strong, the main contact and normally open auxiliary contacts while disconnected due to vibration, the main contactor coil is self-locking and power failure.
(2) the processing overhead crane power outage
Bridge crane control lines from the three-phase 380V power supply through the switch QS access bridge crane, removed from the two-phase three-phase power control circuit as the power to overhead cranes KM main contactor coil supply, the control circuit sequentially string into the overcurrent relay normally closed contact KI, KI1, KI2, KI3, for each crane motor overload protection; series with zero starting protection contacts Q1, Q2, Q3 for zero starting protection; string into security switch SA for emergency stop in case of an accident; string into three limit switches SQ1, SQ2, SQ3 chain protection for cranes; button SB used gantry crane start, the two main contactor normally open auxiliary contact KM completion of the main contactor self-locking; following several groups and each limit position limit switch cam controller corresponding to two pairs of contacts with the work, completed bridge crane limit.
A traveling crane causes power outage
Crane main contactor coil power is due mainly to the following aspects:
(A) the vibration generated when the work carts make Waterloo rail combined with strong, power supply problems, causing the main contactor main contacts and normally open auxiliary contact and disconnect the main contactor coil failure and self-locking cause power outages.
(2) Waterloo local poor contact, resulting in a certain overhead crane rail line to the instantaneous phase, if the missing phase which happens to be connected to the control line, it will make the main contactor coil power, self-lock failure, even due to inertia glide bridge gantry crane poor contact at the re-energized after the main contactor coil is also unable to pull, you must re-press the start button.
(3) lifting heavy vibrations generated when the main contactor is not strong, the main contact and normally open auxiliary contacts while disconnected due to vibration, the main contactor coil is self-locking and power failure.
(2) the processing overhead crane power outage
Bridge crane control lines from the three-phase 380V power supply through the switch QS access bridge crane, removed from the two-phase three-phase power control circuit as the power to overhead cranes KM main contactor coil supply, the control circuit sequentially string into the overcurrent relay normally closed contact KI, KI1, KI2, KI3, for each crane motor overload protection; series with zero starting protection contacts Q1, Q2, Q3 for zero starting protection; string into security switch SA for emergency stop in case of an accident; string into three limit switches SQ1, SQ2, SQ3 chain protection for cranes; button SB used gantry crane start, the two main contactor normally open auxiliary contact KM completion of the main contactor self-locking; following several groups and each limit position limit switch cam controller corresponding to two pairs of contacts with the work, completed bridge crane limit.
2013年8月13日星期二
Lifting how we should manage the dangerous parts of the mark
Lifting machinery, there are some dangerous parts, should this we need to know these parts, and make the corresponding flag, so we use the bridge gantry crane to be able to pay particular attention to avoid danger. It specifically, what does? Consider the following analysis and elaboration.
Lifting dangerous parts of the flags are: yellow and black stripes spaced logo, red and white stripes spaced signs, red flags, red lights logo and word mark.
For these flags, the requirements are:
(A) signs should be clear, complete, correct, and to be able to maintain long-lasting time, signs of color should meet the specified requirements.
(2) The width of stripe mark 50 to 100mm, each color on the sign of not less than two, if it is inclined, then the horizontal angle should be 45 degrees.
(3) spaced with yellow and black stripes flag, overhead gantry crane flag if reducing the effectiveness of the background color will then allow spaced with red and white stripes flag replaced.
(4) Using a text logo, the text portion of the font should be used bold, black font color should be used, and the background color should use yellow.
(5) If a lifting road, rail and water use, but also to comply with the national requirements related marks.
A Dangerous methods of marking parts
(1) For the hook pulley side, extract unit, lifting beams, legs extended, cowcatcher, as well as mobile cab walkway and ladder guard rails at the interface for these parts, you should use yellow and black stripes symbol spaced.
(2) basic boom mobile overhead bridge cranes on both sides, should have a "boom next strictly prohibited," the word mark.
(3) turn tail on both sides should have a "job within a radius of safety" in the text logo.
(2) Safety Management
(A) lifting machinery manufacturing unit should be marked manufactured products, the use of unit should be marked using lifting.
(2) dangerous parts of the flag should be checked regularly maintained in the event of faded or damaged should be repaired or replaced, you can not be sloppy.
Lifting dangerous parts of the flags are: yellow and black stripes spaced logo, red and white stripes spaced signs, red flags, red lights logo and word mark.
For these flags, the requirements are:
(A) signs should be clear, complete, correct, and to be able to maintain long-lasting time, signs of color should meet the specified requirements.
(2) The width of stripe mark 50 to 100mm, each color on the sign of not less than two, if it is inclined, then the horizontal angle should be 45 degrees.
(3) spaced with yellow and black stripes flag, overhead gantry crane flag if reducing the effectiveness of the background color will then allow spaced with red and white stripes flag replaced.
(4) Using a text logo, the text portion of the font should be used bold, black font color should be used, and the background color should use yellow.
(5) If a lifting road, rail and water use, but also to comply with the national requirements related marks.
A Dangerous methods of marking parts
(1) For the hook pulley side, extract unit, lifting beams, legs extended, cowcatcher, as well as mobile cab walkway and ladder guard rails at the interface for these parts, you should use yellow and black stripes symbol spaced.
(2) basic boom mobile overhead bridge cranes on both sides, should have a "boom next strictly prohibited," the word mark.
(3) turn tail on both sides should have a "job within a radius of safety" in the text logo.
(2) Safety Management
(A) lifting machinery manufacturing unit should be marked manufactured products, the use of unit should be marked using lifting.
(2) dangerous parts of the flag should be checked regularly maintained in the event of faded or damaged should be repaired or replaced, you can not be sloppy.
2013年8月12日星期一
Analysis of the general classification introduced overhead crane grab
(A) general overhead crane
General overhead crane is working in the general environment in general-purpose overhead bridge crane (see standard GB/T14405-93). The following types of cranes belong to general overhead cranes.
① General overhead crane hook
Universal hook bridge crane by a metal structure, traveling mechanism, trolley traveling mechanism, hoisting mechanism, electrical and control system and the driver chamber. Device to extract the hook. Nominal weight of 10T or less, mostly a lifting mechanism; 16T is more than the main lifting mechanism deputy two. Such a large variety of bridge crane operating environment can load and transport supplies and equipment.
② Bridge Crane
Grab crane device to grab to grab hoisting rope were contacted, lifting mechanism, opening and closing mechanism. Mainly for bulk cargo, scrap steel, wood, etc. handling, lifting operations. This crane hoisting closure mechanism in addition to outside, its structural components such as overhead cranes overhead crane hook with the same generic.
③ electromagnetic crane
The basic structure of electromagnetic crane hook crane with the same, the difference is a hook to hang a DC lifting magnet (also known as electromagnetic chuck) for lifting with a permeability of ferrous metals and their products . After the bridge is usually located in the motor-generator set to go on stage or in a cab of SCR DC box into DC power to AC power, and then in the car through a dedicated cable reel stand, the DC power supply flexible cable to the lifting electromagnet.
④ dual overhead crane
Dual overhead crane There are three types: grab hook bridge crane, overhead crane hook and grab electromagnetic electromagnetic crane. It features a small car at a desk with two separate lifting mechanism throughout, set to grapple with, a set of hooks used (or a set of electromagnetic chuck with a set of hooks used, or a sets to grab a set of electromagnetic sucker).
⑤ with three overhead cranes
Three with a bridge crane is a kind of multi-purpose crane. Its basic structure and the same electromagnetic crane. Can be used according to need hook lifting heavy objects, you can also grab a hook to hang a motor loading and unloading of materials, you can also grab unloaded and then hang up disk lifting ferrous metals, it is called with three bridge (can be changed) cranes.
Grab * AC power supply, power disk * DC power supply. Therefore, the models must be the same as the electromagnetic hoist crane , set the motor-generator set or SCR DC power box. This crane suitable for constantly changing places extract device materials.
⑥ double trolley bridge crane
This crane bridge crane with hook is basically the same, but in the bridge is equipped with two sets from the weight of the same car. This model is used to lifting and handling elongated object.
General overhead crane is working in the general environment in general-purpose overhead bridge crane (see standard GB/T14405-93). The following types of cranes belong to general overhead cranes.
① General overhead crane hook
Universal hook bridge crane by a metal structure, traveling mechanism, trolley traveling mechanism, hoisting mechanism, electrical and control system and the driver chamber. Device to extract the hook. Nominal weight of 10T or less, mostly a lifting mechanism; 16T is more than the main lifting mechanism deputy two. Such a large variety of bridge crane operating environment can load and transport supplies and equipment.
② Bridge Crane
Grab crane device to grab to grab hoisting rope were contacted, lifting mechanism, opening and closing mechanism. Mainly for bulk cargo, scrap steel, wood, etc. handling, lifting operations. This crane hoisting closure mechanism in addition to outside, its structural components such as overhead cranes overhead crane hook with the same generic.
③ electromagnetic crane
The basic structure of electromagnetic crane hook crane with the same, the difference is a hook to hang a DC lifting magnet (also known as electromagnetic chuck) for lifting with a permeability of ferrous metals and their products . After the bridge is usually located in the motor-generator set to go on stage or in a cab of SCR DC box into DC power to AC power, and then in the car through a dedicated cable reel stand, the DC power supply flexible cable to the lifting electromagnet.
④ dual overhead crane
Dual overhead crane There are three types: grab hook bridge crane, overhead crane hook and grab electromagnetic electromagnetic crane. It features a small car at a desk with two separate lifting mechanism throughout, set to grapple with, a set of hooks used (or a set of electromagnetic chuck with a set of hooks used, or a sets to grab a set of electromagnetic sucker).
⑤ with three overhead cranes
Three with a bridge crane is a kind of multi-purpose crane. Its basic structure and the same electromagnetic crane. Can be used according to need hook lifting heavy objects, you can also grab a hook to hang a motor loading and unloading of materials, you can also grab unloaded and then hang up disk lifting ferrous metals, it is called with three bridge (can be changed) cranes.
Grab * AC power supply, power disk * DC power supply. Therefore, the models must be the same as the electromagnetic hoist crane , set the motor-generator set or SCR DC power box. This crane suitable for constantly changing places extract device materials.
⑥ double trolley bridge crane
This crane bridge crane with hook is basically the same, but in the bridge is equipped with two sets from the weight of the same car. This model is used to lifting and handling elongated object.
The importance and characteristics of the crane installation
Crane installation works just as important to their design and manufacture.
bridge gantry crane installation merits of the quality of the installation work ability, crane structural parts and component life, crane design performance, production and use, and security has a great economic impact.
Lifting equipment installation engineering starting from the device out of the box, to the equipment installed, and through commissioning, commissioning qualified, handling project acceptance so far. Because cranes are of special equipment, with higher risk characteristics, therefore, the installation of the crane, the security is especially important to pay particular attention to the following aspects:
1, cranes are mostly large structure, institutional complex mechanical devices, it is often difficult overall transport is often split after shipping the equipment to use the site as a whole assembly. Therefore, it is necessary in order to reflect properly installed overhead bridge crane overall eligibility to test the integrity of the whole crane and integrity.
2, the crane is in use party sites or buildings orbit. Therefore, its orbit or install base, and the crane itself, is able to complement each other well, and the ability to run whether they can adapt to meet strict requirements, must go through the proper installation and post-installation commissioning and testing concluded .
3, crane high security requirements, safety devices must be complete and properly installed, in order to achieve a reliable, flexible, and accurate technical requirements.
4, according to the importance of safe working crane, the crane was put into use in order to meet the operational requirements of various loads, it must be conducted according to the provisions of the hoist gantry crane load, full load, overload tests. These tests must be the operating state of the crane mechanism or specific for a stationary state. This requires the crane load test after installation only after the transfer of use.
5, cranes, wire rope and other flexible member, and many other parts will occur in some of the initial elongation under load, deformation, loosening. It also requires the crane installation, commissioning loaded after correction for repair, adjustment, handling and fastening. Therefore, we must do a good job crane installation, commissioning, adjustment and some out work in order to ensure the future safety of the crane normally used.
Lifting equipment installation engineering starting from the device out of the box, to the equipment installed, and through commissioning, commissioning qualified, handling project acceptance so far. Because cranes are of special equipment, with higher risk characteristics, therefore, the installation of the crane, the security is especially important to pay particular attention to the following aspects:
1, cranes are mostly large structure, institutional complex mechanical devices, it is often difficult overall transport is often split after shipping the equipment to use the site as a whole assembly. Therefore, it is necessary in order to reflect properly installed overhead bridge crane overall eligibility to test the integrity of the whole crane and integrity.
2, the crane is in use party sites or buildings orbit. Therefore, its orbit or install base, and the crane itself, is able to complement each other well, and the ability to run whether they can adapt to meet strict requirements, must go through the proper installation and post-installation commissioning and testing concluded .
3, crane high security requirements, safety devices must be complete and properly installed, in order to achieve a reliable, flexible, and accurate technical requirements.
4, according to the importance of safe working crane, the crane was put into use in order to meet the operational requirements of various loads, it must be conducted according to the provisions of the hoist gantry crane load, full load, overload tests. These tests must be the operating state of the crane mechanism or specific for a stationary state. This requires the crane load test after installation only after the transfer of use.
5, cranes, wire rope and other flexible member, and many other parts will occur in some of the initial elongation under load, deformation, loosening. It also requires the crane installation, commissioning loaded after correction for repair, adjustment, handling and fastening. Therefore, we must do a good job crane installation, commissioning, adjustment and some out work in order to ensure the future safety of the crane normally used.
订阅：
博文 (Atom)