Mining hydraulic support self-boosting system

A hydraulic support and pressurization system technology, which is applied in the direction of pillars/supports, mining equipment, electric fluid pressure control, etc., can solve the problems of high cost and complex structure, and achieve the effect of low cost and simple structure

Inactive Publication Date: 2008-06-25
CHINA COAL BEIJING COAL MINING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are at least the following disadvantages in the above-mentioned prior art: complex structure, high cost

Method used

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  • Mining hydraulic support self-boosting system
  • Mining hydraulic support self-boosting system

Examples

Experimental program
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Effect test

specific Embodiment 2

[0016] Embodiment 2 As shown in FIG. 2 , a pressure reducing valve 8 is provided on the third pipeline 3 of the piston cavity of the bottom jack 6 . The pressure regulating range of the pressure reducing valve can be 10 ~ 31.5MPa, which can be adjusted as required.

specific Embodiment 3

[0017] Embodiment 3 As shown in FIG. 3 , the third pipeline 3 of the piston cavity of the bottom jack 6 is divided into two branches, namely the first branch 11 and the second branch 12 , the pressure reducing valve 8 and the hydraulic control The one-way valve 13 is arranged on the first branch 11 , and the two branches are connected to the main control valve through the control valve 10 .

[0018] The control valve 10 controls the on or off of the two branches. When the first branch 11 is on, the second branch 12 is off; when the second branch 12 is on, the first branch 11 is off.

[0019] The control valve 10 is a two-position four-way valve, the left position of the two-position four-way valve makes the second branch 12 conduct, and the first branch 11 is closed (ie the position in FIG. 3 ); The bit turns the first branch 11 on and the second branch 12 off.

[0020] The transposition of the two-position four-way valve is realized by collecting the pressure signal of the p...

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Abstract

The invention discloses a mining hydraulic support self-support pressurized system, comprising an upright post and a base lifting jack, wherein a piston cavity of the upright post is connected with a piston rod cavity of the base lifting jack by a pressure piping which is provided with a hydraulic control one-way valve of which the normal open direction directs the piston cavity of the upright post. A pipe line of a piston cavity of the base lifting jack is provided with a pressure reducing valve, or is divided into two branch lines of which one branch line is provided with the pressure reducing valve and the other is not, the opening and the closing of the two branch lines are controlled by a two-position four-way valve. By using the originally equipped hydraulic unit of the mining hydraulic support-the base lifting jack to generate high pressure energy sources and in the self-support mode, the piston cavity of the upright post of the hydraulic support can achieve the high pressure liquid of which the pressure is higher than that of the original solution feed pumping station, thereby reaching the intension of adding pressure. The invention has the advantages of simple structure and low cost, and resolves the problem that the setting load of the hydraulic support on the comprehensive mechanization coal face in the coal mine is too low and improves the ratio of the setting load of the hydraulic support to the rated supporting force to 90 to 98 percent.

Description

technical field [0001] The invention relates to a mine support device, in particular to a mine hydraulic support self-boosting system. Background technique [0002] The hydraulic pressure of the hydraulic support pump station in the comprehensive mechanized coal mining face of the coal mine is generally 31.5MPa. Before this, as long as the initial support force generated by the hydraulic support from the pumping station reaches 70-85% of the rated support force, the roof of the coal mining face can be well controlled. However, due to the improvement of coal mining speed, the roof that is difficult to control continues to appear, which requires the ratio of the initial support force generated by the hydraulic supply pressure of the pump station to the rated support force of the hydraulic support to be increased to 90-98%. So the original liquid supply system can no longer be realized. [0003] In the prior art, an ultra-high pressure pump station and a set of ultra-high pip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D15/51G05D16/20
Inventor 胡志永刘国柱
Owner CHINA COAL BEIJING COAL MINING MACHINERY
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