transportation and other high strength pull cord of transportation

Apart from round Electric hydraulic stacker, there are triangular shares, stocks and other flat oval shaped stocks and shares. Compared with round stock, they have a higher intensity, and the drum or pulley rope groove contact performance, long life, but making more complex.
With high-quality carbon steel wire, cold drawing and heat treatment after repeated high strength can be achieved. Wet or outdoor environment in the workplace can be twisted galvanized steel wire rope, in order to enhance rust resistance.
Rope in all industrial countries are standard products, which can use to choose its diameter, number of strands, number of wires per strand, tensile strength and sufficient safety factor, and its specifications are available in the relevant manual Richard. Except the wire rope wear layer, the main deflection pulleys due to repeated Electric hydraulic stacker and roll, and gradually cause metal fatigue fracture, so the rope pulley or reel diameter ratio is an important factor in the decision life rope. The ratio of large, wire bending stress, long life, but a large organization. You must use the occasion to determine the appropriate ratio. Surface layer of wire rope wear, corrosion or broken wires within each twist at the number exceeds the specified value should be scrapped.
Wire rope is mainly used in lifting, transportation and other high strength pull cord of transportation.
Classification
1. Round strand wire rope
2. Braided rope
3. Flat rope
Discard criteria
Excerpt from "lifting wire rope inspection and retirement of practical norms" (GB5972-86) 2.5.1 (latest specification has been revised to GB5972-2006, the following is for reference only, please refer to the latest specification) the nature and quantity of broken wires
The overall design does not allow lifting rope with unlimited long life.
8 shares for the six stocks and wire rope, wire break occurs mainly in appearance. For multi-strand wire rope (typical multi-strand structure) is different, most of which occurred in the broken wire rope inside, so it is "invisible" fracture.
The following table takes into account these factors, therefore, when combined with paragraph 2.5.2 ~ 2.5.11 factors considered together, it is applicable to various structures rope.

High tower crane tire structure

High tower crane tire tire crane substructure is electric stacker the same with the ordinary. The difference is that the former place in the latter mounted jib up the school installed a p-frame is installed into place two hydraulic cylinders pull up the school. Install boom in the middle column. High tower crane tire tire crane substructure is basically the same with the ordinary. The difference is that the former place in the latter mounted jib up the school installed a p-frame is installed into place two hydraulic cylinders pull up the school. Install boom in the middle column. This crane metal structure composed of the following parts.
 1. Trolley frame
 Crane with steel frame with steel welded into a box-shaped (or slab) structure, the travel drive, transmission device mounted on the support frame mounted umbrella holder r6 rotary support, pallet stackers mounted to the frame at the front and rear end beam. Material generally use low-Jin Gaoqiang degree structural steel. Because although the number of products to be certain counterweight could be considered ordinary carbon steel frame.
 2. Turntable
 Crane turntable structure similar to ordinary tires. To install the mounting arm at school legislation, the tail with significant support beams a ship with a high-strength low-alloy structural steel made with good strength and rigidity of the box-shaped structure.
 3. Column
 Mainly from the text column order jib role that requires a certain column height to install compensate pulley. Column one small ship, I asked for the two big large section box structure to ensure good torsion resistance.
 4. Boom
The boom of the crane truss structure, the main square seamless multi-chord vessels with paragraph 2 and pin hinge.

Early 19th century, showing a bridge crane

Chinese ancient irrigation is used orange jib crane prototype.
14th century, Western Europe showed a shift of human and animal-driven boom cranes.
Early 19th century, showing a electric pallet jack crane; crane important wear parts such as shafts, gears and spreader used metal materials such as beginning and start optional hydraulic drives.
Late 19th century, steam-driven hydraulic crane gradually replace the crane driver.
The beginning of the 1920s era, because the electrical industry and the rapid development of the internal combustion engine industry to electric motor or internal combustion engine-powered equipment of all kinds cranes fundamental composition.
Composition layout
Include hand stacker cranes primary organization, functioning organization, luffing organization, reverse tissue and metal layout. Lifting crane organization is a fundamental task organization, mostly by hanging system and winch components, but also through the hydraulic system lifting heavy objects. Organization to operate or adjust the level of vertical migration of heavy crane operating position, is usually caused by motor, speed reducer, brake and wheel components. Luffing jib type organization only equipped in the crane, jib looked up and downs when reduced, bent downs when increasing amplitude of balanced and unbalanced luffing two kinds. Reverse organizations use to make the boom reversed, is supported by the drive device and the reverse devices. The layout is the skeleton of metal crane, the primary carrier such as bridge, boom and mast for box-shaped layout or truss layout, but also for web layouts, and some can be used as a steel support beam.

First half of 2010

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 hand pallet trucks Machinery Co., Ltd. and other four companies Liugong truck cranes sold 17,463 units, accounting for Electric hydraulic stacker 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 truck crane 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.

Since China Crane started in the 1970s

Shijiazhuang Coal Mining Machinery Factory is the production arm of the earlier winch truck mounted crane factory. Shanxi Changzhi Qinghua Machinery Factory is a enterprise directly under the Ministry of Aeronautics and Astronautics , early production arm-type truck mounted crane . The plant introduction of the Swedish Xi Yabo (HIAB) company production technology, production of folding arm products, no lifting mechanism , the use of heavy lifting and luffing manner , with European style products . Wuhan electric pallet truck crane truck mounted crane factory is earlier production of the manufacturers whose products are arm -type hoist crane with Dongfeng, liberation and the Yellow automobile accessory , automobile chassis at the rear and the installation of a 10t hydraulic winch , particularly Shop Liftere for electrical department rescue and construction needs. Hunan dedicated car factory was founded in 1950 , the Department of Hunan machinery industry key enterprises, the State Planning Commission, State Economic and Trade Commission and the Ministry of Machinery Industry in the country's only point of the crane truck production base. The main products are crane truck , dump truck , van, tanker truck transportation , installed after compression garbage trucks.

Since China Crane started in the 1970s, relatively late , and the development fast enough, only in recent years have greatly developed and abroad, there is a big gap. Specific features:

The main reason wheeled crane overturned

Wheeled cranes rated capacity, with the night stand elevation (working range) changes of. When lifting heavy objects weighing more than the corresponding amplitudes from the rated lifting weight, wheeled cranes might lose the machine stability, resulting in "roll-over" accident.
Wheeled cranes rated capacity, with the night stand elevation (working range) changes of. When lifting heavy objects weighing more than the corresponding amplitudes from the rated electric pallet trucks weight, wheeled cranes might lose the machine stability, resulting in "roll-over" accident.
         Crane tipping machine produced for many reasons, from a number of data analysis can be grouped into the following categories:
1. Overload operation
2. Check rider pallet truck the job is not strict, there are potential causes omissions
3. Do not fight Wen Wen legs supporting legs or lifting operations in insecure
4. Operating environmental conditions such as lighting, fog, interference
5. Crane improperly parked position
6. Hook (tie hanging) the wrong way
7. Illegal operations and command blind drivers
8. High-speed rotation with load amplitude or severe braking
9. Overload limiter safety device failure
10. Other
  For wheeled cranes, especially depression tire lifting hunger, its center of mass is high, cornering, acceleration is too large, the centrifugal force acting on the crane and a sharp increase in the level of inertial forces, but also lead to a rollover accident one of the major conditions .

Crane Network is a professional industry portal crane

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Crane Network is a professional industry portal crane, industry portals all the features. Cranes network is set cranes, single girder cranes, double girder cranes, gantry cranes, electric hoist, chain hoist, chain hoists, tower cranes, port cranes, reducer, motor, bridge cranes, jib cranes, Electric hydraulic stacker lift, crane, lifting crane automation, information as a whole, the use of advanced network technology as the crane industry to provide a full range, comprehensive, effective and efficient communication platform, and provides the crane industry e-commerce application solutions!

Crane Site Classification
Crane's Internet network at this stage ventures with existing model, mainly divided into operating and non-operating sites are two types of cranes website website?. Operating the crane site generally through sales and marketing tools, business development, in order to participate in the portal provides Internet and e-commerce services. Net non-operating cranes to provide advice and retrieval based, but no particular the distinction between non-operating, but the site as a window, not the mainstream of development of business.