Hydraulic system of double-telescopic crane

Abstract

The hydraulic system comprises a hydraulic control system, the hydraulic control system comprises a multi-way valve set, an oil tank, an oil pump, a lifting hook limiting valve set, an overload protection valve set and a winch control module, the oil tank is connected with one end of the oil pump, and the other end of the oil pump is connected with the oil inlet end of the multi-way valve set; the oil outlet end of the multi-way valve group is connected with the oil tank; the lifting hook limiting valve group is connected with a control end of the multi-way valve group; an overload protection valve group is arranged on the lifting hook limiting valve group; according to the structure, the problem that the structure of the telescopic arm is damaged due to the fact that the double-telescopic crane stretches out too long is solved while the double-telescopic crane keeps stretching out, and it can be guaranteed that the double-telescopic crane does not exceed the upper lifting limit during lifting.

Description

technical field [0001] The invention relates to the technical field of telescopic crane systems, in particular to a hydraulic system of double telescopic cranes. Background technique [0002] Ship cranes are machinery used by transport ships for lifting, loading and unloading cargo. It is an important part of ships. Due to the limited space on board, various equipment and hull structure layout are very compact, and the stability of ship cranes directly affects the cargo. Carriage safety. For the sake of safety, each ship must add a mandatory automatic limit function when the ship crane is restricted by the installation location and nearby fixed or non-fixed obstacles. The function is divided into two types: full limit and area limit. The complete restriction is the restriction that the crane is not allowed to enter the rotation area under any working conditions; the area restriction is the restriction that the crane can only rotate and enter the area when the elevation angl...

AI Technical Summary

Problems solved by technology

[0004] However, the double-telescopic crane of this application does not control the extension of the telescopic arm, so when working, it is easy to cause the telescopic arm to stretch out to the limit length and continue to stretch out to cause damage to the structure of the telescopic arm. Manually observe the extended length of the telescopic arm. When it is close to the limit length, it is necessary to manually stop the extension of the telescopic arm. Therefore, the manual workload is increased, and manual observation is prone to errors.

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