Crawler crane mast lifting hydraulic control system and method

Abstract

The invention discloses a crawler crane mast lifting hydraulic control system and method and belongs to the technical field of crawler cranes. The control system comprises a jacking oil cylinder, a balanced valve, a pump pressure adjusting module, a hydraulic pump, a main amplitude winding control system and a controller, further comprises a main commutation module, a pressure sensor, an angle sensor and a control switch, wherein the main commutation module comprises a first electromagnetic directional valve, a second electromagnetic directional valve and an overflow valve. The system can integrate a secondary pressure adjusting module in the main reversal valve group, the quantity of valve blocks is small, the system structure and pipeline arrangement are simple, an oil source does not need to be controlled separately, and the operation is simple and reliable; low pressure-high pressure-low pressure control method is adopted, the working pressure of the jacking oil cylinder is reduced in the case of a long stroke, and the accident that the oil cylinder is bent is avoided; the phenomena the pressure over control of the jacking oil cylinder is too large and the mast is bent are effectively avoided, meanwhile, the automatic control is adopted, and the working strength is reduced; and a control switch is adopted for operation outside a control room, and the control system is safer and reliable.

Description

technical field

[0001] The invention relates to a crane adjustment system and an adjustment method, in particular to a crawler crane mast lift control hydraulic adjustment system and an adjustment method, belonging to the technical field of crawler cranes. Background technique

[0002] The front end of the mast of the crawler crane is hinged to the turntable, the rear end is connected to the main luffing winch through the main luffing steel wire rope, and the middle is supported by the mast jacking cylinder. The steel wire rope only provides pulling force, and the jacking cylinder only provides thrust. When the crawler crane is installed or dismantled, the mast needs to be raised or lowered. During this operation, the steel wire rope is required to maintain a certain pre-tightening force to avoid rope chaos. Since the mast is controlled by the jacking cylinder and the main luffing winch at the same time, a reasonable matching of the speed of the two becomes the key to contro...

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