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Automatic releasing device for pilot-controlled check valve

A hydraulically controlled one-way valve and automatic unloading technology, which is applied in mining equipment, earthwork drilling, pillars/supports, etc., can solve problems such as waste and pollution of the underground environment, and achieve the effect of automatic pressure relief

Inactive Publication Date: 2018-03-06
HONGDA INTELLIGENT MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the pressure rises beyond the working pressure setting value of the hydraulic control check valve, it can only rely on the external overflow valve (ie safety valve) to relieve the pressure, and the outflowing liquid is discharged outside the hydraulic system, which not only pollutes the underground environment, but also causes waste

Method used

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  • Automatic releasing device for pilot-controlled check valve
  • Automatic releasing device for pilot-controlled check valve
  • Automatic releasing device for pilot-controlled check valve

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Embodiment Construction

[0042] The following describes the specific implementation of the present invention in further detail through the description of the embodiments with reference to the accompanying drawings. The purpose is to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and Contribute to its implementation.

[0043] Such as Figure 1 to Figure 15 As shown, it is an automatic unloading hydraulic control check valve, including a valve body 2, an ejector rod, a screw sleeve 5, an inlet sleeve, a valve seat 11, a second spring 13, a pressure regulating mechanism and the automatic unloading device of the present invention, The automatic unloading device of the hydraulic control check valve of the present invention includes a valve sleeve 4, a choke sleeve 20, a first spring 12, a large valve core 9 arranged inside the valve sleeve 4, and a small valve core arranged inside the large valve core 9 1...

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PUM

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Abstract

The invention discloses an automatic releasing device for a pilot-controlled check valve. The automatic releasing device comprises a valve sleeve, a large valve element arranged in the valve sleeve, asmall valve element arranged in the large valve element, and a differential valve element which is movably arranged in the valve sleeve and used for controlling the large valve element to move. According to the automatic releasing device for the pilot-controlled check valve, the differential valve element is arranged in the valve sleeve to drive the large valve element to move, thus the pilot-controlled check valve can be automatically opened, and automatic pressure releasing of the pilot-controlled check valve can be realized accordingly.

Description

Technical field [0001] The invention relates to hydraulic components in a hydraulic circuit of a coal mine hydraulic support. Specifically, the invention relates to an automatic unloading device for a hydraulic control check valve. Background technique [0002] At present, the hydraulically controlled one-way valve used in the hydraulic support of fully mechanized coal mining can only achieve the single-cavity liquid inlet blocking and pressure relief of the matched oil cylinder or column jack. When the pressure rises and exceeds the working pressure setting value of the hydraulic control check valve, the pressure can only be relieved by an external relief valve (ie safety valve), and the outflowing liquid is discharged to the outside of the hydraulic system, which will pollute the underground environment and cause waste . Summary of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the prese...

Claims

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Application Information

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IPC IPC(8): E21D15/51E21D23/16
CPCE21D15/512E21D23/16
Inventor 李子昂李福洪朱述群谢瑞
Owner HONGDA INTELLIGENT MACHINERY CO LTD
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