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Unloading valve and working method thereof

A technology of unloading valves and spools, which is applied in the direction of valve operation/release devices, valve details, multi-way valves, etc., which can solve the problems of large control area, large reversing impact of unloading valves, etc., to achieve control of reversing impacts, reduce The effect of control

Pending Publication Date: 2020-09-04
BEIJING HUAHAI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large control area of ​​this structure, there is a large reversing impact when the unloading valve is opened and closed.

Method used

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  • Unloading valve and working method thereof
  • Unloading valve and working method thereof
  • Unloading valve and working method thereof

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Embodiment Construction

[0025] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] The invention provides an unloading valve, which is used for loading and unloading control of emulsion pumps and spray pumps in mechanized coal mining.

[0027] like figure 1 As shown, the unloading valve includes: valve body 1, one-way valve sleeve 2, one-way valve core 3, one-way valve spring 4, unloading unit valve sleeve 5, unloading unit spool 6, air supply one-way valve 7 , unloading unit spring 8, electromagnetic reversing valve 9;

[0028] The one-way valve sleeve 2, the one-way valve core 3 and the one-way valve spring 4 form a one-way valve group, which is installed in the vertical cavity of the valve body 1 from top to bottom, and the one-way valve sleeve 2 is installed in the valve body. In the ver...

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PUM

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Abstract

The invention relates to an unloading valve and a working method thereof, and belongs to the technical field of coal mining. A circular control cavity is added to the unloading valve, and a force opposite to a control force of a valve element can be generated on the control cavity, so that the control force is effectively reduced, a circular area is smaller than an acting area of the control force, and the direction of converged force is still kept in an original direction of the control force; and acceleration decreases when the converged force decreases, so that moving speed of the valve element can be controlled, and the aim of effectively controlling reversing impact is realized.

Description

technical field [0001] The invention belongs to the technical field of coal mines, and in particular relates to an unloading valve and a working method thereof. Background technique [0002] The existing unloading valve usually has only one control chamber, and the opening or closing of the unloading valve is controlled by comparing the pressure of the control chamber with the front chamber of the valve core. Due to the large control area of ​​this structure, there is a large reversing impact when the unloading valve is opened and closed. Contents of the invention [0003] (1) Technical problems to be solved [0004] The technical problem to be solved by the present invention is: how to design an unloading valve that can effectively reduce the reversing impact. [0005] (2) Technical solutions [0006] In order to solve the above technical problems, the present invention provides an unloading valve, including: valve body 1, one-way valve sleeve 2, one-way valve core 3, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/10F16K15/18F16K31/40
CPCF16K11/105F16K15/18F16K31/40
Inventor 杜建华王燕丽杨淑芳
Owner BEIJING HUAHAI MACHINERY