Electro-hydraulic control pressure suppression system and method for hydraulic support column

Abstract

The embodiment of the invention discloses an electro-hydraulic control pressure shutoff system used for a hydraulic support vertical column. The electro-hydraulic control pressure shutoff system comprises a liquid inlet main pipeline, a liquid returning main pipeline, a pressurizer, two hydraulic control one-way valves, two hydraulic control two-position three-way reversing valves and two electromagnetic reversing valves. The liquid inlet main pipeline comprises a first branch and a second branch; the liquid returning main pipeline comprises a third branch and a fourth branch; the first branch is connected with inlets of the two electromagnetic reversing valves; emittings of the two electromagnetic reversing valves are connected with control openings of the two hydraulic control two-position three-way reversing valves; oil returning openings of the two electromagnetic reversing valves are connected with the third branch; the second branch is connected with inlets of the two hydraulic control two-position three-way reversing valves; oil returning openings of the two hydraulic control two-position three-way reversing valves are connected with the fourth branch; and an emitting of the pressurizer used for being connected with an annular cavity. The embodiment of the invention discloses an electro-hydraulic control pressure shutoff method used for the hydraulic support vertical column. By utilizing the electro-hydraulic control pressure shutoff system and method used for the hydraulic support vertical column, the disassembling efficiency of a middle cylinder guide sleeve can be improved.

Description

technical field [0001] The embodiment of the present invention relates to the field of coal mine electromechanical technology, in particular to an electro-hydraulic control pressure holding system and method for a hydraulic support column. Background technique [0002] In recent years, with the rapid development of my country's coal mine production capacity, the application of hydraulic supports in fully mechanized mining work has become more and more extensive, and the requirements for the support force and working resistance of hydraulic supports are increasing. The requirements for safety, reliability and economy are also getting higher and higher. The hydraulic support column is the main load-bearing part that bears the pressure of the roof, and requires strict sealing performance and strength for the outer cylinder, the middle cylinder guide sleeve and the piston. When the piston seal of the outer cylinder and the middle cylinder, the seal of the guide sleeve or the wea...

AI Technical Summary

Problems solved by technology

When dismantling the guide sleeve of the middle cylinder, the middle cylinder will rotate in the outer cylinder, resulting in a serious power loss of the hydraulic motor of the column dismantling machine, which cannot meet the disassembly torque of the guide sleeve of the middle cylinder, and the disassembly work efficiency is low, and the disassembly success rate is low

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