The main contents are as follows:
1. The electric hoist gantry crane is designed and manufactured according to the standard JB566.3.291, which is used with CD, MD and other electric hoist, and becomes a kind of light and small single beam hoist crane. It is mainly used for loading and unloading and handling of materials in open pit yard. The lifting weight of 3-20T span is generally S ≤ 22m, the control form is divided into ground and driver room, this
machine has the advantages of simple structure, convenient maintenance, light weight and so on.
2. The electric hoist gantry crane is composed of the main beam, the supporting leg, the upper end beam and the lower end beam. The bridge frame is divided into box and truss, which are welded by steel plate and section steel respectively. The latter is light weight and high wind pressure, but the technology is not as good as the former. In order to facilitate storage and transportation, the main beam, leg, and lower beam components are bolted.
3. Electric hoist of hoisting mechanism is used as hoisting mechanism, and running along main beam, its structure is described in electric hoist manual.
4. When the lifting weight and span of the crane is small and the work is not frequent, the trolley running mechanism adopts the "three-in-one" operation mechanism of LD electric single beam, and adopts the angular bearing box structure on the contrary.
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