L48A1 Mast Section Detailed explanation of hydraulic jacking system
The hydraulic jacking system of tower crane is mainly composed of hydraulic pump station, hydraulic jacking oil cylinder, lock valve and high-pressure hose, which is an important part of tower crane. Through lifting and lowering the tower crane frame, the standard section can be increased or decreased so that the tower crane can rise or fall with the change of building height, so as to meet the vertical transportation needs of buildings with different heights. During the lifting operation of tower crane, the system needs to carry more than 30 tons of weight of the upper structure of the tower crane, and the working pressure of the system reaches more than 18 MPa. It belongs to the high-pressure hydraulic system, which has the advantages of small volume, light weight, high specific power, stable operation, etc., but at the same time, it has the defects of low transmission efficiency, easy to produce faults, etc.
Because of the hydraulic jacking system of tower crane, which belongs to the pipeline circulation system with seal and pressure, the flow of oil in the pipeline, the movement of parts inside the hydraulic components and whether the seal is damaged are not easy to be detected, so it is difficult to analyze the cause of the fault and judge the location of the fault. Half of the tower crane accidents are caused by improper handling after the system failure, so as to avoid heavy accidents How to prevent the failure of hydraulic jacking system in case of large equipment accident has become an urgent problem to be solved.
