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Crane refers to a multi action lifting machine that vertically lifts and horizontally carries heavy objects within a certain range. It is also called crown block, aerial crane and crane.
The main characteristics of the tire crane are: its driving cab and lifting control room are combined into one, which is evolved from the crawler crane (crawler crane). The crawler and the walking support of the walking mechanism are transformed into a chassis with tires, which overcomes the defect of the crawler crane (crawler crane) that the crawler shoes cause damage to the road surface, and belongs to the material handling machinery.
Bridge crane is a lifting equipment that is horizontally mounted over workshops, warehouses and stockyards to lift materials. Because its two ends are located on tall cement columns or metal supports, it looks like a bridge. The bridge of bridge crane runs longitudinally along the track laid on the viaducts on both sides, which can make full use of the space under the bridge to lift materials without being hindered by ground equipment. It is the most widely used, the largest number of a lifting machine.
Some working characteristics of hoisting equipment are intermittent movement, that is, the corresponding mechanisms of reclaiming, moving, unloading and other actions in a working cycle work alternately. The development and use of cranes in the market are more and more extensive. Since there are often some accidents due to lifting without outriggers and traveling with lifting loads, the traveling speed is faster than that of crawler cranes (crawler cranes); The operation is stable, the lifting capacity is large, and the crane can walk within a specific range, but the road must be smooth and solid, the tire pressure must meet the requirements, and the lifting distance from the ground must not exceed 50cm; It is prohibited to walk long distances with load. In order to ensure operation safety, it is basically prohibited to carry out hoisting operations without outriggers in China. The varieties of steel wire ropes used for cranes include phosphating coating steel wire ropes, galvanized steel wire ropes and smooth steel wire ropes.