rane manufacturing industry is closely related to urban construction, transportation, energy development and other people's livelihood cause of the industry. In recent years, China's crane industry has achieved rapid development. To bridge gantry crane manufacturing company, for example, to 2008, China's bridge gantry crane has about 450 manufacturing enterprises, employing over 14 million people [1]. If these Electric pallet jack are divided into three echelons: big play, too heavy in the first echelon, they are the industry's largest economy enterprises, with national technical center, comprehensive strength, in order to produce high-end products, such as nuclear ring cranes, large weight metallurgical cranes, foundry cranes, large dock cranes, etc.; second tier that includes Weihua Group, including China's top 20 companies, most of them have plant-level technology center, which is the establishment of Weihua Group regional technology center in Shanghai set up a product design and Research Institute, these enterprises are the backbone of the industry, products cover a wide range of high-end products both in bidding, also participated in the competition from cheap generic products; third echelon is the remaining four hundred SMEs, which generally are small, roughly the same product type, and to be priced competitively based market share effective strategies to enable these enterprises generally poor, severely hampered the pace of development. Then, in the vagaries of the market today, a large number of third-tier companies, the fate of which way to go?Subprime crisis has brought destruction, but also lead the reconstruction
By the U.S. subprime mortgage crisis triggered by the global financial crisis swept across the economic circle, but fears of recession on the crane manufacturing industry is a blessing in disguise, blessing in disguise.
From the macro environment point of view, the financial crisis impact on China's economy and damage is obviously far-reaching, only from some of the surface of the data we can Glimpse some of these issues, for the very high value of GDP in China, GDP was indeed very good.

limit switches and interlock protection device should always check.

limit switches and interlock protection device should always check.
 is not permitted to touch the limit switch as a parking solution.
 lifting the brake problem, you can not lift heavy objects.
 was hanging objects are not allowed to run over the people or equipment.
 When welding unit of the crane, to specifically set the ground, do not allow the use of body ground.
Hand pallet jacks in the lower limit position, the roll must retain the safety loops more ) Cranes not collide with each other, but does not allow the use of a crane to push another crane to work.
 lifting heavy objects, liquid metal, explosive and dangerous goods, you must first slowly lifting from the ground 100 ~ 200mm, trial brake reliability.
repair and inspection of the lighting, the voltage must be 36V or less.
 Overhead Crane all electrical equipment enclosure should be grounded. If the car is not welded to the main beam track should be taken when welding ground measures. Ground wire cross-sectional area greater than 75mm2 available galvanized flat iron or bare copper or greater than 10mm2 30mm2 galvanized round. Cab or crane body ground position should be more than two. Any point on the crane to the power between the neutral point grounding resistance should be less than 4Ω.
 to have regular safety technical inspection, good pre-preparatory workmust be a power outage, and after a power outage in the job switches hanging signs, before doing inspection or maintenance work. If you must live operations, shall have security measures to protect, and there is someone to take care of.

does not allow the crane overload use.

 The following conditions must not lifting: Bundle is not strong; mechanical overload; signal is unknown; oblique; buried in the ground or frozen objects; someone was hanging on the object; no security protection measures flammable, explosive devices and hazardous materials; too full liquid items; rope does not meet the requirements for safe use; lifting mechanism is fault Crane in no obstacles when running on the line, hook or hanging objects spreader and bottom, must more than 2m from the ground. If you cross the obstacles, obstacles to be over 0.5m high
 on the nominal weight lifting less than 50% of the objects, which allows simultaneous operation of both institutions; hanging from the weight of 50% greater than the rated object, only can an agency action.
 has a main and auxiliary hook bridge crane, do not increase or decrease while  are not allowed on the object being lifted or hammering and welding work on the  must be a power outage, and after a pallet jacks outage in the job switches hanging signs, before doing inspection or maintenance work. If you must live operations, shall have security measures to protect, and there is someone to take care of.

est suspension

The bridge crane lifting off the ground 0. 3-0. 5m, after 10min after no abnormality, further shaking bridge crane testing, inspection winches, masts, ropes and anchor cable winds of reliability, all normal , continue lifting.
(5) install the operating room
The bridge crane lifting off the ground about 2.5m high, setting up the sleepers under the crane heap, so that the crane resting on the sleepers on the heap, and then installed in the operating room on the frame. Zhuangwan cab car after adjusting the position, this position was calculated to determine the mast lifting points on both sides to reach equilibrium.
Then leave the sleeper crane helicopter heap a small distance, carefully adjusting the position of the car, make sure to balance again after fixing the car. Check other lifting forklift jacks, safe and reliable confirmation only after the lifting style lifting.Bridge crane within the plant, because the top rail from the roof chord close, plus overhead cranes are larger in size and weight, it is not mechanized lifting. SMEs often use a single mast crane lifting the overall standing, so you can improve efficiency, shorten the construction period and reduce high-altitude operations, the construction procedure is as follows.

mast mast position due to be erected in the carts between the two main beam bridge crane center of gravity, the car must be biased, but the mast should deviate from the centerline of plant, shown in Figure 7-8. Its offset should be based on weight carts, trolleys and trolley weight offset distance determined by calculation.
③ mast mast bottom should be compacted bottom handle, smooth, spread over two sleepers, if necessary, can be added between two sleepers rails or beams, paved area determined by calculating base endurance, ensure that the ground bear mast axial pressure.
④ mast mast Electric pallet truck  methods used mobile cranes erect, quick and safe crane beam can also be used stand mast bracket wrench can also be used auxiliary mast vertical mast. Using the crane beam corbel Erecting the mast, to carry on the crane beam corbel force checking to ensure the transverse horizontal component does not exceed the maximum weight within the span of the bridge crane nominal weight and the amount of the sum of a trolley / 20.
Erection of masts, the mast should be pre-wind cable rope bindings temporarily close the roof truss bottom chords on the mast until the mast was hanging to determine the location immediately after the entire wind cable rope fastened on top of the mast and tighten the ground, such as individual wind cable rope lift after the force has stayed truss chord or circumstances, the application temporarily wind cable hove live mast, fixed wind cable rope adjusted to the appropriate location, and then release the temporary wind cable wire.
⑤ hung pulley block, set the winch for small and medium-bridge from the physical machine, and can be hung two pulley block, with two hoisting winches, hoist mast set the location and distance from the center is greater than the length of the mast, winches available fixed column within the plant roots, but should be tied at the wood and other protective pads.
(2) group on the carts, loaded trolley traveling crane girders, the car shipped to the lifting position for assembly, carts group finished, the car is placed on a trolley track, and carts tied securely.
(3) bundled beam carts for less than 50t overhead crane, just hang two pulley block, generally using a cross-tied method, the method is: the mast lug toward the direction of the end beam bridge crane system hang hanging pulley block , running rope through the top of the mast mast fixed pulley down to the bottom along the guide pulley toward the winch. Run rope using sequential method. In the side of the cart with a rope tied to the beam cross-licensing to go through two openings platen bundle, so that tied rope was tapped: "∞" shape, commonly known as "8"-shaped bundle method, as shown in 7-9.
When the lack of effective height of the mast, can be boom EMU binding movable trolley beam inside the carts in the top surface of the beam erection carts beams, ends binding slings, sling around the underside of the beam from moving into a tie tackle.

Injection Mixer for lifting hot metal, steel furnaces and continuous injection of molten steel ingot lifting equipment or ingot molds and other purposes. Main car lifting ladles, ladles, Vice car to flip and other auxiliary work.
2 clamp crane:
The use of high-temperature steel ingot clamp vertically lifted onto a soaking pit furnace, or put it out into the car shipped ingot.
3 off the ingot crane:
From the ingot ingot molds used to force prolapse. Small car off the ingots have a special device, way off the ingot Hand Pallet Truck according to the shape of the ingot: Some off the plunger pressed ingot ingot crane, lift the ingot mold with tongs; some with tongs pressed ingot mold, with the tweezers lift ingots.
4 charging crane:
Added to the open hearth in charge. Lord of the column with the bottom of the car to pick rod for stirring bins and place it into the furnace. The main column is rotatable about a vertical axis of rotation, pick rod can swing up and down and swing. Vice trolley for furnace repair and other auxiliary operations.
5 Forging crane: [1]
With forging hydraulic press used with large workpieces. Main car hanging on a hook turn special feeder to support and flip the workpiece; Vice trolley for lifting workpieces.
?? Lifting is a modern industrial production and transport of the production process of mechanization and automation of the important tools and equipment. So overhead crane and mining enterprises in the interior and exterior, steel chemical, railway transportation, port and logistics flow and other departments and sites are widely applied.

Junwei Outlook: future trends handling tools

Pallet truck for our daily lives has brought unlimited convenience, then the next day, turn the hydraulic removal tool development path toward what it? Today, Jun Wei Ling Ying-commerce expert will come and we explore this issue.
With the development of technology, vans should be intelligent direction. Computer technology in the Electric pallet jack hydraulic lifts gradually promote the use and control of information satisfied man. Unmanned hydraulic lifts will apply to toxic or special needs of the environment, with a larger space for development.
Hydraulic tools also increased versatility, handling platform which allows the user under the premise of not increasing the investment performance of the device itself into full play, to complete more work. Will pay more attention to ergonomic improve manipulation comfort
Stainless steel truck maintenance, operability will be stronger, display, fault diagnosis system will be more perfect. "Force" 25 tons forklifts recently successfully developed, the product is mainly used for stacking seven layers of container (suspension Ground clearance 18.8 m), with international mainstream configuration, easy to manipulate. Reliable, with safety protection, condition monitoring and fault display device. Pallet truck series is a new important development trend. Product replacement cycle is shortened.
Outstanding scientific and technological workers through our unremitting efforts, I believe that in the near future will be handling tools to a new height.

Aluminum lift platform classification

 Aluminum lift platform as a type lifting platform, according to different properties, can be classified as follows:
 1 Mobile aluminum lift platform: a new design of a new generation product that uses a new type of aluminum alloy, high strength as profiles, so that lift and swing minimal deflection. It is lightweight appearance, in a very small space for maximum lifting capacity. The single aerial breeze, you can move for the job.
 (2) Fixed aluminum lift platform: a new design of a new generation product that uses a new type of aluminum alloy, high strength as profiles, the deflection of the elevator and the swing is minimal. It is lightweight appearance, in a very small space for maximum lifting capacity. The single aerial breeze, unable to move can only be fixed for operations.
 3 telescopic table aluminum lift platform: Telescopic lift table combines four mobile or vehicle-customization, aerial work platform when the worktop free expansion, thereby increasing the operating range! Can be customized according to customer's actual situation.
 4 folding lifting platform: A household folding lift, belongs to a lift, especially a folding lift home. The beams from the two steel plates, and which by a plurality of inverted "U"-shaped welding connection card is connected, the intermediate forming a gap, respectively, through the front and rear ends can be connected to the hoist motor and the retreat of the block disposed in the gap formed by the inner rail . Thereby overcoming the existing home elevators existing structure is irrational and inconvenient to use other defects. The utility model has reasonable structure, manufacturing simple, low cost, easy to use, practical, and can use more than one machine can also be single-family household use, etc.
 5 Wall-mounted lifting platform: not applicable excavation pit in the workplace, with a single collapse, double-collapse type, the lift is smooth, safe and reliable, suitable for supermarkets, hospitals, restaurants, workshops cargo transport and other industries.
 6 car lift: the lifts installed in the car aerial equipment. By the special chassis, working jib, three-dimensional full rotation mechanism, flexible clamping device, hydraulic systems, electrical systems and safety devices and other components.
7 scissor lift: is widely used aerial electrics tacker. Its scissor mechanical structure, the lifting platform lifting with high stability, large platform and a high load carrying capacity, so that a greater range of high-altitude operations, and for many people simultaneously. It makes high-altitude operations more efficient, safer and more protected.
 8 The chain lift: Due cylinder drive, named for the chain to enhance the chain lift.
9 Boom Lift: used aerial lift equipment, aerial work across barriers, platform lift to any position, can work while walking, compact, flexible steering, the width of the site to ensure its equipment into the narrow passages and congested work areas. Backup power means operable working platform reset and convenient mode of transport, can be towed anywhere. The operation panel for easy identification, multiplet mechanical, electrical and hydraulic safety, electrical integration of advanced integrated hydraulic system. Crank aerial vehicles are widely used in municipal, electricity, street lighting, advertising, communications, photography, landscape, transportation, terminals, airports, ports and large industrial and mining industries installation maintenance and climbing operation.

Junwei Outlook: future trends handling tools

 Pallet truck for our daily lives has brought unlimited convenience, then the next day, turn the hydraulic removal tool development path toward what it? Today, Jun Wei Ling Ying-commerce expert will come and we explore this issue.
With the development of technology, vans should be intelligent direction. Computer technology in the electric hydraulic lifts gradually promote the use and control of information satisfied man. Unmanned hydraulic lifts will apply to toxic or special needs of the environment, with a larger space for development.
Hydraulic tools also increased versatility, handling platform which allows the user under the premise of not increasing the investment performance of the device itself into full play, to complete more work. Will pay more attention to ergonomic improve manipulation comfort.
Stainless steel truck maintenance, operability will be stronger, display, fault diagnosis system will be more perfect. "Force" 25 tons forklifts recently successfully developed, the product is mainly used for stacking seven layers of container (suspension Ground clearance 18.8 m), with international mainstream configuration, easy to manipulate. Reliable, with safety protection, condition Manual stacker and fault display device. Pallet truck series is a new important development trend. Product replacement cycle is shortened.
Crawler handling small tanks especially suitable for narrow space or within the limits of the use of, and in this condition the use of roll bar is very difficult. Crawler handling small tanks can not change the direction of movement of the premise is for heavy movement of position changes.
Outstanding scientific and technological workers through our unremitting efforts, I believe that in the near future will be handling tools to a new height.

Crawler handling small tanks Precautions

Crawler handling small tanks (Crawler heavy movement of devices) with fixed weights are moved after handling small tanks can move position while eliminating the roll bar movement of a large number of frequently moving roll bar work, handling small tanks greatly reducing the labor intensity and improve the ergonomics and safety.
Crawler handling small tanks tank owners if the alloy steel rollers, crawler carry a small tank truck wheel is better than conventional wheels carry a small tank of its material advantages of steel wheels for the major, not prone to breakage, ordinary type the handling of small tanks rollers flexible, easy turn, can be applied in most situations.
Crawler handling small tanks especially scissor pallet truck for narrow space or within the limits of the use of, and in this condition the use of roll bar is very difficult. Crawler handling small tanks can not change the direction of movement of the premise is for heavy movement of position changes.

Full Electric Stacker for narrow aisles and confined spaces operations, is elevated in warehouses, workshops ideal for loading and unloading pallets of equipment can be widely used in petroleum, chemical, pharmaceutical, textile, military, paints, pigments, coal and other industrial , as well as ports, railways, garages, warehouses containing explosive mixture, loading and unloading, stacking and handling operations.
Users select all-electric Stacker need special attention to the following parameters:
Load range, lifting height, fork width adjustment range, fork length, leg spacing, the height of the legs there are special, they will directly affect the choice of what kind of electric stacker.

How do customers choose Select all-electric Stacker

 Full Electric Stacker structurally Electric Pallet Trucks more than the door frame, fork lift height is generally 5.0 m inside, as people improve environmental protection requirements, electric stacker increasingly popular products on the market, it the simple, no exhaust and noise pollution, and the use and maintenance of an internal combustion forklift cost a lot lower.
Full Electric Stacker for narrow aisles and confined spaces operations, is elevated in warehouses, workshops ideal for loading and unloading pallets of equipment can be widely used in petroleum, chemical, pharmaceutical, textile, military, paints, pigments, coal and other industrial , as well as ports, railways, garages, warehouses containing explosive mixture, loading and unloading, stacking and handling operations.
Users select all-electric Stacker need special attention to the following parameters:Load range, lifting height, forklift jacks width adjustment range, fork length, leg spacing, the height of the legs there are special, they will directly affect the choice of what kind of electric stacker.Tonnage continuously improve product is nearly three years of construction cranes in a major trend, crawler crane is one of the fastest growing types of aircraft. In 2003, sales of crawler crane market is just hundred sets, and products are mainly small and medium-tonnage. Into the "Eleventh Five-Year", the large-scale integration lifting mode become the development direction of large tonnage crawler cranes rapid increase in demand, China's leading enterprises have started construction crane develop large-tonnage products. Beginning in 2009, Zoomlion, Sany, XCMG Fuwa Heavy Industry and launched a kiloton crawler cranes. Currently, XCMG crawler crane 2000t level has also been unveiled,

Cattle were secondary school students homemade hydraulic forklift

 Xiamen City College senior technical schools vocational skills of six secondary school students with the most simple tools such as rasp, pure hand-made out of a computer that can hold 260 kg weight of small hydraulic forklift. This other equivalent vocational institutions in the country is not a precedent.
Electric pallet jack experts Lizhao Cheng city, Mackinaw such persons that made ​​this truck not only requires a comprehensive mathematics, physics, materials, mechanics and other areas of expertise, but also has a strong practical ability. Forklift different angles threaded processing, and cylinder liner, piston design, production, even for professional factories concerned, both with very difficult. In particular, the forklift small size, light weight, ideal for smaller indoor space instead of ordinary handling forklift to carry out the work, there is a high practical valueake the road of specialization, but to avoid the risk of a single product; OK scale of the road, but also can come up with their own competitive products. SMEs in the development in broadening the product line, it should also lay the product depth. In addition to leading domestic enterprises big play, too, and as the representatives Weihua, companies should still rely on the development of the real advances in technology, scale and specialization is balanced and comprehensive, and take the road of technology to lead the development of science and technology . In a word, do first wide, do a strong and continuous innovation.
China's crane industry in the process of growing doomed smooth sailing, the economic crisis, in shock identify the future direction of development, need to learn a number of areas, the lack of need to improve a lot. Experienced orgasm, settling at the bottom, tortuous journey to build our industr

Features

On the basis of the existing truck without repair and change, a direct installation of electronic scales (waterproof type)
Measuring and shifting the same time, working time can be shortened
Via RS-232C can print weighing information
Purpose: Traffic Center. Cargo transit station. Warehouses
Technical parameters
Maximum weighing: 2000kg.3000kg.5000kg
Minimum weighing: 1kg.2kg.2kg
Accuracy: ± 0.1%
Metering components: electronic scale display instruments and sensors
Power supply: 6 LED display
Select items: Forklift dedicated printer (RS-232C

on the nominal weight lifting less than 50% of the objects, which allows simultaneous operation of both institutions; hanging from the weight of 50% greater than the rated object, only can an agency action.
(10) has a main and auxiliary hook bridge crane, do not increase or decrease while the main and auxiliary hook (special exception).
(11) are not allowed on the object being lifted or Hand pallet trucks and welding work on the object below (there is support can be).
(12) must be a power outage, and after a power outage in the job switches hanging signs, before doing inspection or maintenance work. If you must live operations, shall have security measures to protect, and there is someone to take care of.

Drum truck

Product FeaturesUsed to transport tanks and loading and unloading tank electronic scales measuring modeBattery operation (DC) manual hydraulic operation
Easy handlingSafe handling of dangerous substances
Has strong corrosion resistance, generally used in food, chemicals, aquatic products and cleaning materials handling, but also in cold storage environments.
Built-in safety valve, fully sealed cylinder, cylinder seals on the main imports from Germany.Two nylon guide wheel to wheel to save the operator's physical strength and to protect the pallet load sheave. * Load Wheel: single wheel-type or wheel-type, polyurethane finger, nylon, powered palle ttruck nylon bag.
Steering wheel: Nylon polyurethane, rubber.
Available: Lifting Hand drums fast car, foot brake, the truck can also be configured drums truck scales
Technical parameters
Maximum weighing range (300kg)
Minimum scale value (0.1kg)
Load measuring device: CI-1200, Sensors
Power: Rechargeable battery, transformer
Display: 6 LCD (H: 23mm)
Standard function keys: on / off, zero, tare, lock
Options:Printer (RS-232C)
Automatic feeding
Battery charger, AC Adapter

Casting crane:

Injection Mixer for lifting hot metal, steel furnaces and continuous injection of molten steel ingot lifting electrics tacker or ingot molds and other purposes. Main car lifting ladles, ladles, Vice car to flip and other auxiliary work.
2 clamp crane:
The use of high-temperature steel ingot clamp vertically lifted onto a soaking pit furnace, or put it out into the car shipped ingot.
3 off the ingot crane:
From the ingot ingot molds used to force prolapse. Small car off the ingots have a special device, way off the ingot mold according to the shape of the ingot: Some off the plunger pressed ingot ingot crane, lift the ingot mold with tongs; some with tongs pressed ingot mold, with the tweezers lift ingots.
4 charging crane:
Added to the open hearth in charge. Lord of the column with the bottom of the car to pick rod for stirring bins and place it into the furnace. The main column is rotatable about a vertical axis of rotation, pick rod can swing up and down and swing. Vice trolley for furnace repair and other auxiliary operations.
5 Forging crane: [1]
With forging hydraulic press used with large workpieces. Main car hanging on a hook turn special feeder to support and flip the workpiece; Vice trolley for lifting workpieces.
 Lifting is a modern industrial production and transport of the production process of mechanization and automation of the important tools and equipment. So overhead crane and mining enterprises in the interior and exterior, steel chemical, railway transportation, port and logistics flow and other departments and sites are widely applied.

To beneath pressure protection link.

The crane in the steel production process can participate in a particular process operation, the basic structure and general overhead cranes are similar, but in lifting a small car is also equipped with a special working body or device. This work is characterized by crane frequent use conditions, a Hand Pallet Truck level of work, there are five main types weight should be along the upper, lower, left, right, front and rear directions, and can at the same time in the three-dimensional movement direction. In addition to the downward movement, the remaining five should set the direction of the terminal endpoint protection.
(2) be a reliable braking device, even in case of power failure, the weight will not fall because of its own weight.
3 should have a greater speed range, in the stationary state begin to exercise, start at the lowest speed began to accelerate, acceleration is not too large.
4 To prevent overloading or speeding danger may arise, to have short-term overload protection. Overcurrent relays generally used as a circuit overload protection.
5 To beneath pressure protection link.
6 have security measures.

Lifting

Bridge crane within the plant, because the top rail from the roof chord close, plus overhead cranes are larger in size and weight, it is not mechanized lifting. SMEs often use a single mast crane lifting the overall standing, so you can improve efficiency, shorten the construction period and reduce high-altitude operations, the construction procedure is as follows.
(A) the erection of the mast
① mast mast height maximum height of the ground to the roof top of the mast to a height less operating space between the roof and the height of the mast sleepers inquiry. Minimum height should meet the needs of lifting height.
② mast mast position due to be erected in the carts between the two main beam bridge crane center of gravity, the car must be biased, but the mast should deviate from the centerline of plant, shown in Figure 7-8. Its offset should be based on weight carts, trolleys and trolley weight offset distance determined by calculation.
③ mast mast bottom should be compacted bottom handle, smooth, spread over two sleepers, if necessary, can be added between two sleepers rails or beams, paved area determined by calculating base endurance, ensure that the ground bear mast axial pressure.
④ mast mast erection methods used mobile cranes erect, quick and safe crane beam can also be used stand mast bracket wrench can also be used auxiliary mast vertical mast. Using the crane beam corbel Erecting the mast, to carry on the crane beam corbel force checking to ensure the transverse horizontal component does not exceed the maximum weight within the span of the bridge crane nominal weight and the amount of the sum of a trolley / 20.
Erection of masts, the mast  scissor pallet truck be pre-wind cable rope bindings temporarily close the roof truss bottom chords on the mast until the mast was hanging to determine the location immediately after the entire wind cable rope fastened on top of the mast and tighten the ground, such as individual wind cable rope lift after the force has stayed truss chord or circumstances, the application temporarily wind cable hove live mast, fixed wind cable rope adjusted to the appropriate location, and then release the temporary wind cable wire.
⑤ hung pulley block, set the winch for small and medium-bridge from the physical machine, and can be hung two pulley block, with two hoisting winches, hoist mast set the location and distance from the center is greater than the length of the mast, winches available fixed column within the plant roots, but should be tied at the wood and other protective pads.
(2) group on the carts, loaded trolley traveling crane girders, the car shipped to the lifting position for assembly, carts group finished, the car is placed on a trolley track, and carts tied securely.
(3) bundled beam carts for less than 50t overhead crane, just hang two pulley block, generally using a cross-tied method, the method is: the mast lug toward the direction of the end beam bridge crane system hang hanging pulley block , running rope through the top of the mast mast fixed pulley down to the bottom along the guide pulley toward the winch. Run rope using sequential method. In the side of the cart with a rope tied to the beam cross-licensing to go through two openings platen bundle, so that tied rope was tapped: "∞" shape, commonly known as "8"-shaped bundle method, as shown in 7-9.
When the lack of effective height of the mast, can be boom EMU binding movable trolley beam inside the carts in the top surface of the beam erection carts beams, ends binding slings, sling around the underside of the beam from moving into a tie tackle.
(4) Test suspension
The bridge crane lifting off the ground 0. 3-0. 5m, after 10min after no abnormality, further shaking bridge crane testing, inspection winches, masts, ropes and anchor cable winds of reliability, all normal , continue lifting.
(5) install the operating room
The bridge crane lifting off the ground about 2.5m high, setting up the sleepers under the crane heap, so that the crane resting on the sleepers on the heap, and then installed in the operating room on the frame. Zhuangwan cab car after adjusting the position, this position was calculated to determine the mast lifting points on both sides to reach equilibrium.
Then leave the sleeper crane helicopter heap a small distance, carefully adjusting the position of the car, make sure to balance again after fixing the car. Check other lifting facilities, safe and reliable confirmation only after the lifting style lifting.

Security

Check item
Bridge crane 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:
(A) lifting height limiter, travel limit switch and the positive performance of interlocking institutions
 Bridge crane
Chang, safe and reliable.
(2) meet the safety requirements of the main parts: 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. Hand Pallet Truck hook and pulley no obvious defects. The surface of the wire rope wear, 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, 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.

Safety trolley line

Safety trolley line is a new mobile power supply unit, with its insulation, security, temperature, vibration, electrics tacker saving and other advantages to gradually replace the old bare angle iron and copper trolley line. Safety trolley line from the caulking tube or slot in the plastic plate in the T2 smooth copper or aluminum conductors embedded wearable as a carrier fluid, a combination of transmission a conduit under the open slot to facilitate the collector operation, a high wear resistance by the collector copper-graphite brush of the power-oriented electrical work.
Overhead crane in use and easy off, sometimes in the transmission conduit sparks some serious blasting trolley line ", resulting collector replaced too frequently, affecting production. To this end, the following improvements:
(A) increasing the collector brushes chamfered and polished smooth;
(2) increasing the collector between two opposite brush spring strength, flexibility, ensure spring return freely;
(3) to deepen. Reinforcement collector in a spring seat, the return spring to ensure the brush is not easy in the work "bit string";
(4) two safety trolley line connections connecting block should be chamfered to ensure a smooth transition collector. Meanwhile, to ensure the safety of the normal use of the trolley line, driving workers standardize operations, maintenance workers of periodic maintenance, periodic inspection is also essential.

Precautions

(A) Each crane must be hung in a prominent place signs rated capacity.
(2) work, it was not allowed on the bridge or hook carrier.
(3) no operation license and drink are not allowed to drive cranes.
(4) the operation must concentrate, not allowed to talk, smoking or doing things unrelated.
(5) To the car clean; allowed misplacing equipment, tools, flammable, explosive materials and dangerous goods.
(6) does not allow the crane overload use.
(7) The following conditions must not lifting: Bundle is not strong; mechanical overload; signal is unknown; oblique; buried in the ground or frozen objects; someone was hanging on the object; no security protection measures flammable, explosive devices and hazardous materials; too full liquid items; rope does not meet the requirements for safe use; lifting mechanism is faulty.
(8) Crane in no obstacles when running on the line, hook or hanging objects spreader and bottom, must more than 2m from the ground. If you cross the obstacles, obstacles to be over 0.5m high.
(9) on the nominal weight lifting less than 50% of the objects, which allows simultaneous operation of both institutions; hanging from the weight of 50% greater than the rated object, only can an agency action.
(10) has a main and auxiliary hook bridge crane, do not increase or decrease while the main and auxiliary hook (special exception).
(11) are not allowed on the object being lifted or Hand pallet trucks and welding work on the object below (there is support can be).
(12) must be a power outage, and after a power outage in the job switches hanging signs, before doing inspection or maintenance work. If you must live operations, shall have security measures to protect, and there is someone to take care of.

2010, a new high

First half of 2010, China's four major categories of construction crane sales totaled more than 24,000 units, an increase of 48.9%. In addition to exports, the major economic indicators are close to record levels during the first half of 2008. As of September 2010, China's only truck cranes, truck-mounted cranes and crawler crane sales reached 33,712 units, more than 2009 full-year sales of 345 units 4 categories crane. Construction crane industry once again restored in 2010 a rapid growth momentum.
First half of 2010, exports of construction cranes rebounded, exports amounted to 1,133 units, exports amounted to 1.86 billion yuan, respectively, an increase of 43.6% and 40.0%. Among them, exports of 893 crane units, up 40.5 percent; crawler crane export 171 units, up 141.0 percent; crane export 96 units, down 6.8%.
From the first half of 2010 corporate sales situation, Xu Zhong, Zoomlion, Sany Automobile Lifting Machinery Co., Ltd. and other four companies Liugong truck cranes sold 17,463 units, accounting for truck cranes 87.15% of total sales, Xu Heavy sales growth biggest year growth rate of 30.5%; Sany Technology, XCMG Construction Machinery, ask dug Heavy and Zoomlion sold crawler cranes 736 units, accounting for this type of product total sales 91.43%, XCMG sales increase maximum , an increase of 115.8%; XU Sui
And total sales of Shijiazhuang Coal Mining Machinery crane 2370, accounting for the types of products 70.04% of total sales, Xu grew 62.4% over year.
Domestic construction crane on the market, cranes (including all terrain crane) is still the industry's leading products. January to September 2010, truck crane sales 27,572 units, up 35.6%; total exports of 879 units, an increase of 62.1%. Which ,3-June for the automotive crane sales season, the average monthly sales of 3,500 units or more, the peak appeared in March, sales reached 4,429 units; January largest growth rate, an increase of 158.3%; while sales in February and September appeared fell. From the product structure, small and medium-tonnage Electric pallet jackcrane sales increased. 1344 crawler crane sales units, up 61.93 percent, close to the 2008 record high. Sales of products to 50t, 70t, 80t, 100t, 150t and 250t crawler crane mainly small and medium level. Truck crane half sales 4796 units, up 38.53 percent.

Product sales in the domestic construction cranes, truck cranes have been dominant.

 However, sales data 2006-2009, truck crane market share began to decline from 2007 to 80% in 2009 to 79.5%. With the development of economic construction, transportation, energy, metallurgy, petroleum, chemical, municipal and other areas of production equipment needs of the crane diversified trend, greatly stimulated the crane, crawler cranes and other product development. In 2008, the market share of these two models, respectively, reached the highest value of 16.5% and 5.9%.
Tonnage continuously improve product is nearly three years of construction cranes in a major trend, crawler crane is one of the fastest growing types of aircraft. In 2003, sales of crawler crane market is just hundred sets, and products are mainly small and medium-tonnage. Into the "Eleventh Five-Year", the large-scale integration lifting mode become the development direction of large tonnage crawler cranes rapid increase in demand, China's leading enterprises have started construction crane develop large-tonnage products. Beginning in 2009, Zoomlion, Sany, XCMG Fuwa Heavy Industry and launched a kiloton crawler cranes. Currently, XCMG crawler crane 2000t level has also been unveiled, Zoomlion 3200t design and development is underway. Large tonnage crawler cranes, it not only makes our country to rid itself of this type of product is completely dependent on imports of the situation, but also fully demonstrates the technological level of domestic production and manufacturing capacity.
Construction crane industry industrial restructuring in the enterprise development scissor pallet truck deepening. In 2006, Terex acquired 50% equity interest from long; 2008, Liugong acquisition Bengbu Vibro Engineering Machinery Co., Ltd. Jinzhou Huayuan Fuwa Heavy Machinery M & Co., Ltd., a joint venture Manitowoc Dongyue Heavy Industries and etc., are the development of the enterprise and a significant impact on the industry, and are fully reflected in 2009. In 2009, Anhui Liugong sales revenue grew 72.7%, cranes sales grew 62%; ask dug Heavy brocade truck crane 297 units sold, an increase of 234%; Hoisting Machinery Co., Ltd. Sany Automobile sales jumped cars Crane's first three production enterprises; Jingcheng Heavy Recovery truck crane machine production, when it achieved sales of 83 units of the good results. 2009, XCMG and Zoomlion Mobile Crane Branch 2 industry profits accounted for 95.5% of total profits.

Great development 2006-2009

In 2006, sales of four categories of construction cranes (truck cranes, crawler cranes, truck-mounted crane and mobile crane) 17,403 units, up 34.1 percent. 2007 sales reached 24,831 units, up 42.68 percent. 2008 Although affected by the financial crisis, China's four major categories of construction crane sales are still growing, almost equal to 28,000 units, up 12.8 percent; sales revenue of 27.27 billion yuan, an increase of 60.2%, total profit of 2.61 billion yuan, an increase of 46%. 2009 policy of stimulating domestic demand in the country under the guidance of China's construction crane industry bottomed out gradually from the second half. Annual sales revenue reached 31.13 billion yuan, an increase of 14.2%; total profit reached 200 910 million yuan, an increase of 11.6%; sales of four categories of crane 33,367 units, up 19.2%.
electric pallet trucks from China's construction crane after 2006 has maintained significant growth, while imports declined. In 2008, China's exports is the highest ever recorded crane, the annual export of various cranes and other construction machinery 5008 units, up 58%; total amount of more than 8.2 billion yuan, an increase of 88%, industry sales accounted for 30 %, exports become an important economic growth point. But the world recession in 2009 exports of construction cranes have a significant negative impact on exports fell significantly throughout the year without signs of recovery. 2009 exports fell by 64.8 percent, exports fell 67%.

Construction crane industry development status analysis

   In recent years, China's construction machinery industry get rapid development, where construction cranes are among one of the rapid development of the aircraft. Since 2006, China's construction cranes deepening of enterprise reform, continuously improve product quality, new products continue to emerge, product sales and export volume is growing. It should be said Hand stacker China's construction crane industry has entered a stable and sustainable development.

Gantry crane Zhidongshiling failure analysis

Rotate work, Zhidongshiling disintegration of rotating worm gear box can be found in the limit torque limiter does not reach its design slip resistance moment when the malfunction.
(1) Analysis: actual operation starts rotating gantry crane, the brake is very frequent, so that the friction torque limiter plate and the worm gear sets often produce relative movement between the cone and wear, rubbing up and down along the worm taper gradually move closer to the plate. Put the worm, the next junction of cone angle, and its diameter is less than the friction disc small end diameter, and thus in the worm was inside the cone grind annular boss, when pressed by the pallet jacks force generated by the spring on the conical surface and the annular projection plane two parts together to bear. When the annular projection plane withstand clamping force dominates, due to the short arm boss plane rotation and the friction surface is small, so that the friction torque is reduced, and less than the original design moment occurs when these failures.
(2) exclusion method: the disintegration of the rotating worm gear box, remove the worm, the worm within the annular projection on the cone car to make the worm gear sets at the intersection of two cone is a transitional cylindrical surface, and the cylindrical surface small end diameter slightly larger than the diameter of the friction plate.

The main production "Lang too" brand series of lifting products.

 Companies registered capital of 100 million, the existing staff more than 800 people, college degree or above 110 people, with the title of senior engineer 40 people, the new plant production area of ​​500,000 square meters, construction area of ​​200,000 square meters, the annual output value of 200 million yuan, is the Central Plains region producing explosion-proof cranes, explosion-proof electric hoist, explosion-proof motor, explosion-proof electrical most complete varieties, the largest production and sales enterprises.
Design and manufacturing company "Lang too" brand of Scissor lift equipment and explosion-proof motors, explosion-proof electrical appliances, has achieved national issued a "national industrial production permit," national explosion-proof electrical products quality

Differential lock with all-wheel drive system,

 a dedicated off-road tires, powerful, easy to pass through a variety of off-road;
Configuring a torque converter with lock function, acceleration performance increased by 10%, the transfer fast;
Four kinds of steering modes, forward and reverse travel functions, the turning radius is less than 0.5m above similar products, unrivaled flexibility can maneuver;
Optimization of thepallet jacks system, retractable legs, hoisting, luffing, slewing speed increased by 10%, the operating efficiency. .

Chinese construction machinery industry's largest and most complete product

varieties and series, the most competitive and influential large enterprise groups, major product categories are: construction cranes, earth moving machinery, mining machinery, road construction and maintenance machinery, pavement and compaction machinery, concrete machinery, piling and non-excavation machinery, railway construction equipment, aerial fire-fighting equipment, heavy trucks and special dedicated vehicles, special chassis, engine, hydraulic and mechanical Electric pallet jack and other infrastructure components mainframe products, the current XCMG products have been sold to the world 158 countries and regions. 9 host and three critical parts market share in the domestic first one. Category 5 hosts continued export volume and export volume ranks No. 1 domestic industry

Wheeled cranes

Wheeled cranes including truck cranes and all terrain cranes, are packed in ordinary or special all-terrain vehicle chassis chassis of a crane, the advantage of mobility, transfers quickly. Chassis 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. Generally available, and get off two control rooms, operation outstretched legs remain stable. For garages, docks, construction sites and other places of various types of hoist operations, is the largest output, the most widely used type of crane. XCMG wheeled cranes comprehensive industry-leading performance indicators, currently Hand Pallet Truck tons to 1,200 tons full range of products. Truck crane sales have been first in the world for eight consecutive years, in 2010 all terrain crane XCMG QAY500 won the China Machinery Industry Science and Technology Progress Award.