Second, the construction boom characteristics

First, according to whether the running gear
Can be divided into mobile and stationary tower crane tower crane.
Mobile tower crane according to different walking devices can be divided into rail, tire, car type, crawler of four. Rail-mounted tower crane tower fixed on the bottom shelf to walk, you can run on a dedicated Hand stacker, good stability, can walk with a load, high efficiency, which is widely used in construction and installation works. Tire, truck mounted and crawler tower crane trackless equipment, easy to move, but you can not walk with a load, poor stability.
Stationary tower crane according to different installation location, is divided into self-elevating and attached inner climbing type two, self-elevating tower crane can be attached to the building with the temperature increased for high-rise buildings, structures only withstand horizontal loads coming from the crane, attached to convenience, but take up more than structural steel; internal climbing tower crane inside the building (elevator shafts, stairwells), using a set of brackets and lifting system for climbing, Scissor lift more burdensome , but take up less structural steel, does not require installation of foundation, all the weight and the load borne by the building bear.

Second, the construction boom characteristics
Can be divided into luffing jib luffing (boom) and trolley boom (flat arm) tower crane.
Luffing jib luffing jib tower crane is lifting unrealized by luffing, and its advantages are: give full play to the effective height of the boom, simple mechanism, the disadvantage is the minimum amplitude is limited to the most significant 30% so, can not completely close the tower, luffing jib together with the load when lifting, can not take the load amplitude.
Trolley jib tower crane is by horizontal boom track mounted Trolley realized range, and its advantages are: amplitude range, the trolley can be approaching the tower, band load amplitude, shortcomings are: boom force situation is complex, demanding for the structure, and the boom and the car must be in the building upper spire roof mounting height of buildings to be higher than 15-20 meters.

tnhe annual output value of 200 million yua

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, tnhe annual output value of 200 million yua, 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 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 has eight 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.

he amount of pollution from the type of hydraulic system

Contamination of the hydraulic system Scissor lift sail technology classification of sources can generally be divided into the following three types.

The amount of pollution from the type of hydraulic system
     Contamination of the hydraulic system lifting sail technology classification of sources can generally be divided into the following three types. Namely;
     1. Assembly pollutants
     2. Intrusionproblem pollutants
  3. Generates pollutants
   In Hand Pallet Truck truck crane manufacturing, assembly and commissioning process, the hydraulic system is the main pollutant assembly contaminants. Cranes used in the process, pollutants are mainly generated intrusionproblem pollutants and contaminants. These pollutants and mainly solid particles such as iron, sand, ash umbrella, as well as fiber, film, welding slag, dark film, air. In the crane commissioning process, there intrusionproblem contaminants. Hydraulic system during commissioning solid particle size distribution as shown in Table 2-8. Testing method, g an optical microscope or a manual counting method.

Wheeled crane safety technology

If you are using and managers to fully understand the whole structure, principles, technical performance, design specified conditions of use, security technology, you will get the best results.

  Crane various powered palle ttruck in the actual production can be fully played, depending on the actual use are reasonable. If resorted to improper maintenance, heavy machinery wheeled Zhao difficult to be effective, will exacerbate the wear and cranes sail affecting life, and even cause accidents. If you are using and managers to fully understand the whole structure, principles, technical performance, design specified conditions of use, security technology, you will get the best results. This section focuses on the use of mobile cranes described in security technology.
  (A) the operator
     Crane operators should be subject to strict Luo theoretical training expertise and practical technical training, proficiency in vehicle driving and crane operators two technologies. Not only to master the crane structure, working principle and technical performance, and should be read in various cooked Random technical documents, such as brochures, manuals performance, operation and maintenance manuals and safe use of rules, but also memorize the various provisions in the operation signals master - · some basic knowledge and skills.
     (Two) safe working environment conditions
     Cranes at work due to bad weather, Scissor lift as high winds, thunderstorms, big men, etc., should stop work; prohibited in a landslide hazard venue working near transmission lines; at night or in the operator's view is obstructed operating conditions, there must be reliable measures, and must be directed with the job; complex field operations in terms of personnel, generally set Starsky signs and safety fence, or by hand, as the security guard on duty.

Wheeled crane safety technology

If you are using and managers to fully understand the whole structure, principles, technical performance, design specified conditions of use, security technology, you will get the best results.

  Crane various powered palle ttruck in the actual production can be fully played, depending on the actual use are reasonable. If resorted to improper maintenance, heavy machinery wheeled Zhao difficult to be effective, will exacerbate the wear and cranes sail affecting life, and even cause accidents. If you are using and managers to fully understand the whole structure, principles, technical performance, design specified conditions of use, security technology, you will get the best results. This section focuses on the use of mobile cranes described in security technology.
  (A) the operator
     Crane operators should be subject to strict Luo theoretical training expertise and practical technical training, proficiency in vehicle driving and crane operators two technologies. Not only to master the crane structure, working principle and technical performance, and should be read in various cooked Random technical documents, such as brochures, manuals performance, operation and maintenance manuals and safe use of rules, but also memorize the various provisions in the operation signals master - · some basic knowledge and skills.
     (Two) safe working environment conditions
     Cranes at work due to bad weather, Scissor lift as high winds, thunderstorms, big men, etc., should stop work; prohibited in a landslide hazard venue working near transmission lines; at night or in the operator's view is obstructed operating conditions, there must be reliable measures, and must be directed with the job; complex field operations in terms of personnel, generally set Starsky signs and safety fence, or by hand, as the security guard on duty.

Wheeled crane safety technology

If you are using and managers to fully understand the whole structure, principles, technical performance, design specified conditions of use, security technology, you will get the best results.

  Crane various powered palle ttruck in the actual production can be fully played, depending on the actual use are reasonable. If resorted to improper maintenance, heavy machinery wheeled Zhao difficult to be effective, will exacerbate the wear and cranes sail affecting life, and even cause accidents. If you are using and managers to fully understand the whole structure, principles, technical performance, design specified conditions of use, security technology, you will get the best results. This section focuses on the use of mobile cranes described in security technology.
  (A) the operator
     Crane operators should be subject to strict Luo theoretical training expertise and practical technical training, proficiency in vehicle driving and crane operators two technologies. Not only to master the crane structure, working principle and technical performance, and should be read in various cooked Random technical documents, such as brochures, manuals performance, operation and maintenance manuals and safe use of rules, but also memorize the various provisions in the operation signals master - · some basic knowledge and skills.
     (Two) safe working environment conditions
     Cranes at work due to bad weather, Scissor lift as high winds, thunderstorms, big men, etc., should stop work; prohibited in a landslide hazard venue working near transmission lines; at night or in the operator's view is obstructed operating conditions, there must be reliable measures, and must be directed with the job; complex field operations in terms of personnel, generally set Starsky signs and safety fence, or by hand, as the security guard on duty.

Bridge crane classification

Bridge crane bridge crane can be divided into ordinary, simple beam bridge crane bridge crane and metallurgical dedicated three. Aka crane, driving.
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 Scissor lift loads. Small frame and mounting bracket is lifting mechanism and trolley run institutions and other parts of the rack, usually welded structure.
Crane drive mechanism can be divided into two categories: one for the central drive, which uses an electric motor to drive long shaft-driven initiatives on both sides of the wheel; another is separately driven, that is active on both sides of each wheel with a Hand pallet jacks motor. Medium and small bridge cranes more use brakes, gear units and motors combined into one "triple play" drive mode, a large common bridge crane lifting weight for ease of installation and adjustment, universal coupling drive device often used .
Crane agencies generally only four driving and driven wheels, if the starting weight is large, common approaches to reduce the wheel increases wheel pressure. When more than four wheels, a frame must be balanced hinge device, the crane load is evenly distributed on each wheel.
The metal structure of the bridge from the main beam and side beams, divided into single girder and double girder bridge bridge categories. Single girder bridge by a single span girders and located on both sides of the end beam composed of two dual-beam bridge girders and by the end beam components.

Introduction crane hook

Lifting of the most common type of spreader . Often by means of pulley hook hanging in other parts of the rope on the hoisting mechanism .
Brief introduction
Name hook lifting hook.
Scissor lift of the most common type of spreader . Often by means of pulley hook hanging in other parts of the rope on the hoisting mechanism .
Divided according to the shape hook single hook and double hook ; according to manufacturing methods are divided into forging hook and laminated hook .
Single hook is simple to manufacture , easy to use , but the force is not good, mostly used in lifting capacity of 80 tons in the workplace ; lifting force is often used large symmetrical double hook . Laminated hook from a few pieces riveted steel plates cut to shape , the individual sheets when the cracks will not destroy the entire hook , security is good, but larger self , mostly used in large lifting or hoisting steel ladles the crane. Hook by the impact of the job process often requires the use of toughness, good quality carbon steel.
Hand pallet jacks a very wide classification , generally include: shackles, rings , ring, pear ring , long rings, composite rings, S hook , nose hook, American hook claw hook , eye slip hook-shaped , with the insurance card rings screws , chain shackle, are unique, innovative , high quality, safe , suitable for factories, mines , petroleum, chemical and marine terminals . Ensure safety, quality and safety factor , static load up to 3 times . Capacity from 5 tons to 150 tons.
Edit this paragraph technical requirements 1 , the purchase of the hook should be the manufacturer's certificate and other technical documents before use ; important sector procurement hook as : railways, ports , etc., should be strictly hook factory inspection ( testing ) . Claw hook

Jib crane landing, body erect. The reporter Yan Zhiguo photo

Yesterday morning, the stone city of Guang'an Street intersection with Zhongshan Road site, a transfer of a forklift truck cranes, due to center of gravity, suddenly erected.9 am yesterdayNot Scissor lift up forklift crane transfer"I let a crane to lift truck south side point, did not expect to suddenly stand up cranes, forklifts will fall down." Command in the pit where Xiao Zhao said, it may be too long crane arm, coupled with a forklift is also very heavy crane center of gravity is way off.About 7 meters tall crane body erect, long boom mounted on top of the pit, a small forklift rollover in the pit, the crane driver jumped from the cab.Crane leak from the tank, the scene diesel smell wafting thick. Workers hurried out with mud buried diesel.Try lifting crane10 am, a large crane arrived and began to stand up near the crane trying to lift, but several times without success. For personnel began emergency transfer crane.12:30 XuThree cranes came "propped"Came to the rescue of the crane reaches three, workers with two fixed crane slings crane body stand up, with the third grabbed jib crane slings, slowly pull up, then slowly put the crane levels. 13 am, cranes stand up to be "propped up."

the three breaking mainstream enterprise

2005 to 2010, showed significant changes in micro-environment: Countries increase infrastructure investment, power and other major construction projects led to the Scissor lift process transformation, the end of this process, the three breaking mainstream enterprise: First, the world of speed, the second is the crane product structure and category further subdivided spectrum spans from 5 tons to 2,000 tons cover, vehicle type, car type, all the earth, crawler, off-road tire, etc. to get commenced; Third, large-scale. China's largest tonnage of 200 tons crane before history was broken, from the end of the world Cranes hundred-ton to kiloton crossedNevertheless, the authors think that the torque limiter on the mall at that time there is still a lot to improve local. Specifically there are two aspects. First, the torque limiter to improve primary element such as sensors, photoelectric encoder and line plug-ins, mostly due to one component manufacturers outsourcing, outsourcing products, because since the product quality varies greatly, simply because some shortages affecting the entire system functions . Solution to the problem is the manufacturers of the primary elements carefully selection, repeated experiments, compared to reach the optimal combination, maximum limit satisfactory system function needs; Second, some manufacturers component sensing devices depict it has not done for a long time solid, such as the appearance of the flash when testing very precise, 2-3 months after rendering errors often lead to torque limiter which the whole system failure, affecting the system robustness.

generator and starter, battery electrodes fork tank, air filter.

1 Fork supporting, Scissor lift chain tensioner studies screws, wheel bolts, wheel fixing pins, brake steering screws, check the steering reliability, flexibility. Electric forklift cleaning dirt, mud and dirt angstroms, key parts are: fork frame and door frame slide, generator and starter, battery electrodes fork tank, air filter.
2, the brake springboard inching pedal, hand brake check: Depress the pedal to check for abnormal slow or jam. Confirm the safety and reliability of electric forklifts handle. Speakers, lighting, instrumentation and other tests.
3, check leakage, focusing on: all fittings, brake pump, lift cylinder, transmission, drive axle, steering pressure, steering cylinder and so on. Tire Pressure Check: insufficient should be added to the specified value, confirm no leakage. Check the tire tread and the side without damage, the rim is deformed. Polyurethane tire check: Check road conditions, to see if there is a greater degree of tire wear, the pattern of the tire is mounted, the wheel in the rolling direction should be noted that tag.
4, electric forklift hydraulic oil, electrolytic examination: first allocate dipstick, wipe the feet and then pull out the head is inserted after checking the oil level is between the two tick marks. Working tank oil level should be between the two tick marks; too little oil, the pipeline will be mixed with air, too much will overflow from the cover. Battery electrolyte is also up and down the scale to be in between the lines, less will have to add distilled water to top line.
5, the battery maintenance: electric forklift use should pay particular attention to timely and maintenance of battery charging and battery, battery charging method should pay attention not only to make the battery is fully charged, it can not cause the battery from overcharging. Found that lack of electricity, should be charged as soon as possible to prevent excessive battery discharge. Cars running, do not "forward, backward" direction switch mistaken as steering switch.
6, brake fluid check: Check the brake fluid is in the range of the scale, and check whether the brake lines mixed with air. Add brake fluid to prevent dust and water mixed.

What is pallet rack?

         Pallet stacking shelves devoted to the storage of goods on pallets, similar in its basic form and shelves. Pallet racking is the most common form of shelves, provide 100% accessibility, and there is a good picking ruthless efficiency. However, this Scissor lift storage density is low, requires more channels. According to their access to the channel width of the channel is divided into traditional, narrow track-type channel and ultra-narrow channel-type channel

In use should avoid prolonged stepping clutch. Some drivers in the frequent shifting when the sake of simplicity and reduction actions, not taxiing off the file, and for a long time stepping on the clutch, this habit is to make the burnt clutch, clutch damage, drive axle gear damage.
Starting essentials
1. Use starter starting time can not exceed 15 seconds, the second time starting with the first interval between the start of not less than two minutes: When the engine begins to work, you should immediately release the switch button to return the starter gear stopped in situ work to prevent damage to the starter by the anti-band:
(2) the amount of hydraulic oil: liquid level in the oil level should be up and down tick in midfield.
3 Check the piping, fittings, pumps, valves for leaks and damage.
4 Check the brake.
(1). Brake pedal air travel should be 20-30 mm;
(2). Before the gap between the base plate and the pedal should be greater than 20 mm;
5 Always check the parking brake, hand position in the end should be in the 15% of the full stop on the ramp.
6 Check the instrumentation, lighting, switches and electrical lines are working correctly.

The product has a simple structure, high efficiency, easy maintenance

The product has a simple structure, high efficiency, easy maintenance, small size, light weight, long life and other advantages.
2, the submersible pump has a unique balance device, so that the pump does not produce a downward axial force, thus prolonging the life of the motor.
3, the pump housing cold drawn seamless steel tube, combined with the pump does not produce an axial force, thus greatly improved Scissor lift, can be more than 2000 meters, greatly increased the use of the pump.
4, high wear pump impeller installed gasket filler material by grinding, and enhance the wear resistance of the pump, submersible pump than ordinary ability has greatly improved resistance to sand. Meanwhile pump impeller can be ductile iron, cast iron nickel alloy, copper alloy and other materials, pump outlet tubing connections are deducted and flange connecting the two.
Applications: QJ type lifted Submersible Pump suitable for extraction from deep groundwater, rivers, reservoirs, canals and other water projects, irrigation and livestock water mountain plateau, city, factories, railways, construction sites supply, drainage, mine rescue, sea upgrade, fountain landscape.
Advantages:
Motors, pumps - body, running into the water, no sparks, explosion-proof, safe and reliable.
For tube wells, mine no special requirements, as long as the pipes can withstand the pressure accordingly.
Installation and easy maintenance, simple, small footprint, without the construction of pumping stations.

Forklifts and other special equipment safety law on January 1, 2014 shall come into force

 According to Xinhua News Agency, Beijing, June 29 - "Special Equipment Safety Act" (hereinafter referred to as "Special Equipment Safety Law") by the Ministry of the Twelfth National People's Congress at its 3rd meeting in June 2013 Through March 29, June 29, 2013 People's Republic of Presidential Decree No. 4 announcement. "Special Equipment Safety Act" sub-General, production, operation, use, inspection, testing, supervision and management, emergency rescue and investigation, legal liability and supplementary provisions Chapter 7 101, since January 1, 2014 shall come into force .
Legislative Affairs Commission of the NPC Standing Committee, deputy director of Kan Ke, said recently that China spate of crane accidents in production and more, causing heavy casualties and property losses. This special equipment designed to prevent accidents and protect personal and property safety laws timely introduction of the National People's Congress to the people-oriented, people's lively interpretation of legislation.
 Act established a "corporate commitment to safety and the main responsibility for the government to fulfill regulatory duties and social security oversight role" of the Trinity a new model of special equipment safety, further highlight the special equipment production, management, and use are the main responsibility for security.
Forklift, truck, tractor in the Scissor lift Administration of Quality Supervision, Inspection and Quarantine Bureau of Special Equipment Safety Supervision Bureau in January 14, 2010 release of "special equipment added to the directory on the notification (national quality inspection Special [2010] No. 22)" in the the addition of special equipment catalog are clearly defined, including Code: 5110 Name: forklift; code 51210, Name: truck; Code: 5130 Name: tractor addition of special equipment, and indicate the original "special equipment catalog" " internal combustion forklift trucks, battery forklift trucks, internal combustion side forklifts, straddle trucks, reach trucks, three stacking forklift, pallet truck, forklift explosion "Adjust this supplement catalog" truck. "
The promulgation of the "Special Equipment Safety Law" on special equipment design, manufacture, installation, alteration, repair, and other activities required administrative license system; business links, the law prohibit the sale, lease without obtaining permission production, without inspection and testing is not Qualified special electric stacker or the obsolete and has scrapped special equipment; use of links, the law requires that all special equipment must be used to the regulatory department for registration before use, the use of units to implement the security responsibility for the safe operation of the equipment to carry out periodic safety inspections , to carry out regular maintenance; Once equipment failure, should immediately stop running, to conduct a comprehensive inspection, eliminate potential accidents. The truck industry, "Special Equipment Safety Act" is not only relevant norms of corporate behavior in the production process, and bear the main responsibility for security has been clearly defined.
It is worth mentioning that the Act provides special equipment should be established "identity card", product quality and traceability, recall special equipment defects and serious accidents scrapping of special equipment and other systems. Among them, special equipment records complete information throughout the life cycle of the "identity" shall include: quality certificate and other documents, periodic inspection and periodic self-inspection records, the daily usage records. This will help to keep abreast of the device "health" and reduce accidents.

How to solve high lift pump operation problems

 Scissor lift, Plain Lakes axial - usually outside the flood, waterlogging to run, although the design of some of the pumping station on the run in some adverse conditions conducted verification, but due to the impact of changes in the water environment, along the river and lake riverbed silt yearly high, pumping stations inside and outside the water level amplitude is large, especially in the outer river floods during high water levels, constant pressure water supply equipment, use of lift beyond its design, pumping stations were forced to shut down, or even damaged. Solve the above problem, according to the actual situation of the chestnut stations, measures were taken.
    (A) adjusting the blade installation angle Currently, domestic axial diameter of 300 mm or more, the blade angle can be adjusted. Adjusting the blade installation angle to some extent, the expansion of the use of the pump, when the pump head increases, the blade mounting angle can be reduced, appropriate to reduce the amount of water to meet the pump in case of normal operation of the high lift requirements.
    At present, the domestic large quantities, widely distributed, diameter of 1 m below the small axial stations (generally by the township administration), because technology is weak, with angle adjustment laborious (half-tone). Therefore, the pumping station has been put into operation, the few changes depending on the operating conditions of the normal operating range of the pump are reviewed and adjusted, resulting in waste of energy, pumping stations can not play normal benefits. It is therefore recommended to strengthen technical guidance, especially for those who use improper lift pumping more than the normal range of use, should be based on the new operating conditions, the pump carefully review the working conditions, the corresponding technical measures. According to the economic and effective use of the principles, generally only when the angle adjusting operation can not meet the new requirements, before considering other technologies (valves, pumps) rehabilitation programs.
    (2) If the blade angle for the pump to the minimum still can not meet the requirements of high-lift, long-running, you can consider replacing a high lift pumps, such as the number of revolutions lower than the guide vane axial or mixed flow pumps.
    Replace the water pump is usually a relatively easy way, but for medium-sized diesel pump, to consider the units supporting and runner matching and other factors, so a larger project investment, the unit cost of equipment is high. In addition, at the same flow rate, due to the high lift pump, pump cavitation and hydraulic vibration increased possibility, especially with the inlet and outlet conduit between the hydraulic pump with the problems often become the principal contradiction changed. Therefore, on the basis of the original pump hydraulic pump used for high-lift solutions to the problem, not only the higher cost, but technically more complex, and thus generally apply only to small axial flow pump station. In addition, not only to consider changing the pump when pumping at maximum lift can safely run, but also it should be possible to make Li stations in operation for many years, the average efficiency is higher, for maximum lift and a big gap in the average lift pumping station should be fully Consider this.
    ⑶ Change Change impeller pump impeller and for roughly the same advantages and disadvantages. However, the change relates only to the pump impeller within a component, which can save a lot of investment in upgrading, usually for medium to large axial flow pump station repair and transformation

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