A hydraulic support and its supercharging device

Abstract

The invention discloses a pressurizing device for a hydraulic support, comprising a valve body (2) having an inner cavity and moving along the inner cavity and dividing the inner cavity into a first cavity (211) and a sectional area smaller than the first cavity The piston (3) of the second cavity (212) of (211); the piston (3) has two parts that cooperate with the two cavities; the first oil port (41) of the first cavity (211) is guided through the orientation The first one-way valve (51) communicates with the lower cavity of the column (1), and communicates with the oil source (01) through the second one-way valve (52) of directional conduction; the second one-way valve (212) of the second cavity (212) The oil port (42) communicates with the oil source (01) or the oil return tank (02). Through the movement of the piston (3) in the inner cavity, the pressure in the lower cavity of the column (1) is increased, and the supporting capacity of the hydraulic support is improved. The present invention also provides a hydraulic support including the pressure boosting device.

Description

technical field [0001] The invention relates to the technical field of coal mine machinery, in particular to a booster device for a hydraulic support. The present invention also relates to a hydraulic support comprising the above pressurization device. Background technique [0002] With the rapid development of my country's economic construction, coal and other industries continue to develop in the direction of mechanization and automation, and comprehensive mechanized coal mining equipment is more and more widely used in coal production under various geological conditions. [0003] Hydraulic support is an important part of comprehensive mechanized coal mining equipment. It can reliably and effectively support and control the roof of the coal mining face, isolate the goaf, and prevent gangue from entering the mining face. The supporting use of hydraulic support and coal mining machine realizes comprehensive mechanized coal mining, solves the contradiction that roof manageme...

AI Technical Summary

Problems solved by technology

[0006] The column 12 is the power part of the hydraulic support, which drives the lifting of the hydraulic support and provides supporting force for the hydraulic support. Therefore, the supporting force provided by the column 12 directly affects the supporting capacity of the hydraulic support. The length of the surface continues to increase, and the initial supporting force of the column 12 of the hydraulic support is generally insufficient, thus limiting the supporting capacity of the hydraulic support

[0007] In order to increase the output pressure of the column 12, thereby improving the supporting capacity of the hydraulic support, the method of increasing the working pressure of the pump station is generally adopted. However, due to the limitation of the technical level and equipment capacity, the increase range of the working pressure of the pump station is limited, which limits the support of the column. 12 The output pressure is further increased; and, since the pump station is far away from the work site, the hydraulic oil in the pump station is pumped into the column 12 through the oil circuit, and the pressure loss along the way is relatively large, resulting in a large waste of energy

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