290HC Mast Section the quality problems of the tower crane itself causing the accident
There are many causes of tower crane accidents, and the quality problem of tower crane is one of the main reasons. In this paper, the tower crane construction machinery factory will summarize the following common problems of tower crane quality that caused the accidents according to the causes of previous accidents?
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Design problems: there are defects in the design of moment limiter, poor sensitivity; unreasonable stress in the design of steel structure, defects in the design of hydraulic system, etc.
Parts problems: quality problems of moment limiter components, steel materials used in steel structure, quality problems of hydraulic system components, etc.
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Manufacturing problem: the welding of steel structure fails to meet the requirements. The height of the weld is not enough, and there are defects such as porosity, slag inclusion and even faulty welding, especially the welding quality problems in the important connecting parts of tower cap, tower crane arm, balance arm and other parts. The geometric dimension of steel structure does not conform to the requirements. The blanking is not in accordance with the requirements, and the cross-sectional dimension of steel fails to meet the national standards.
Problems of factory certificate and instruction manual: without factory certificate, it is a fake and inferior product. There is no batch description and no indication of changes to the original design.
290HC mast section is the best in this field
