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Balancing compensation valve

A technology of balance compensation and valve core, applied in the field of balance compensation valve, can solve the problems of affecting the working life, small load, rising liquid pressure, etc., to achieve the effect of increasing the working pressure range, ensuring the bearing capacity, and reducing the impact of the liquid

Inactive Publication Date: 2007-03-07
SICHUAN AEROSPACE FENGHUO SERVO CONTROL TECH CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] At present, the usual hydraulic support, such as the hydraulic support used in coal mines, when the lifting column is about to reach the top, the balance cylinder stops the liquid supply, and the column cylinder pushes the support top plate to the rock formation. During this process, the liquid pressure in the balance cylinder rises, and the balance The safety valve is in the open state for a long time, which affects its working life and has a negative impact on the stability of the attitude adjustment of the hydraulic support
If the electronic control mode is changed, the balance cylinder can follow the lifting column. This method cannot control the bearing pressure of the balance cylinder and the balance action of the support is open-loop control. The load is very small, and there is a hidden danger of the support attitude tilting, so it is very difficult. use less

Method used

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  • Balancing compensation valve

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Embodiment Construction

[0011] As shown in Figure 1, the embodiment of the present invention consists of a safety valve assembly and a reversing valve assembly, wherein the safety valve assembly has a safety valve assembly liquid inlet chamber 1, a safety valve assembly adjustment spring 2, a safety valve assembly return liquid chamber 3, a safety valve assembly Valve assembly spool 18, safety valve assembly valve seat 19, one end of the safety valve assembly liquid inlet chamber 1 is connected to a pressure vessel, and the other end is connected to the safety valve assembly return liquid chamber 3, in which there is The safety valve assembly spool 18 and the safety valve assembly adjustment spring 2 are installed on the outer circumference of the safety valve assembly spool 18. One end of the safety valve assembly adjustment spring 2 is offset against the step of the safety valve assembly spool 18, and the other end passes through its spring. The seat is in contact with the adjustment screw 20 of the...

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Abstract

This invention relates to balance compensation valve, which comprises safety valve parts and switch valve parts, wherein, the safety valve parts have safety valve liquid-in chamber, safety valve parts liquid back chamber, safety valve part center, safety adjusting spring, safety valve socket matching with safety part chip under preset load of adjust spring; the switch parts have main valve liquid back chamber, switch valve liquid-in chamber connected and switch valve parts control chamber connected to switch valve chip.

Description

technical field [0001] The invention relates to a balance compensation valve mainly used for the follow-up of the balance oil cylinder and the column oil cylinder of the hydraulic support used in coal mines. When the column is lifted and lowered, the balance oil cylinder is followed by pressure, and the balance oil cylinder is locked when the column stops, so as to realize the attitude of the hydraulic support. The stability of the adjustment ensures the safe operation of the bracket. Background technique [0002] At present, the usual hydraulic support, such as the hydraulic support used in coal mines, when the lifting column is about to reach the top, the balance cylinder stops the liquid supply, and the column cylinder pushes the support top plate to the rock formation. During this process, the liquid pressure in the balance cylinder rises, and the balance The safety valve is in the open state for a long time, which affects its working life and has a negative impact on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D15/51
Inventor 崔永忠汪国柱
Owner SICHUAN AEROSPACE FENGHUO SERVO CONTROL TECH CO LTD
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