Electrohydraulic unloading valve with both hydraulic control mode and electrohydraulic control mode

A working mode, electro-hydraulic control technology, applied in earth-moving drilling, fluid pressure actuating device, mining equipment, etc., to achieve the effect of compact structure, simple operation and reasonable installation

Inactive Publication Date: 2006-08-02
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the domestic emulsion pump station is not equipped with an intelligent monitoring system, and the key pressure control element on the emulsion pump—the unloading valve is all hydraulically controlled, and there is no electric hydraulic control working method. It is necessary to realize the hydraulic system of the emulsion pump station. It is necessary to have an unloading valve with two working modes of hydraulic control and electro-hydraulic control—electro-hydraulic unloading valve. Therefore, it is urgent to design an electro-hydraulic unloading valve with two working modes of hydraulic control and electro-hydraulic control. The problem to be solved is also the need for intelligent monitoring of fully mechanized mining face

Method used

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  • Electrohydraulic unloading valve with both hydraulic control mode and electrohydraulic control mode
  • Electrohydraulic unloading valve with both hydraulic control mode and electrohydraulic control mode

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Embodiment Construction

[0011] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0012] The invention has an electro-hydraulic unloading valve with two working modes of hydraulic control and electro-hydraulic control. It is mainly composed of a main valve body 2, a pilot valve 11 and a filter 10. Two sets of one-way valve groups are installed side by side in the main valve body 2. 1. The main valve group 7 and the thrust piston 8 are provided with a liquid inlet 26 connected with the liquid path of each valve group. The accumulator joint 3 is installed at the end of the main valve body 2 and communicated with the high-pressure liquid outlet chamber 25. A high-pressure liquid outlet joint 4 is installed above the main valve body 2, and an unloading liquid return joint 5 is installed below the main valve body 2; On the end face, the pilot spool 12 and the copper piston sleeve 23 are installed inside the pilot valve body 1 , and the pressu...

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Abstract

The electrohydraulic unloading valve with both hydraulic control mode and electrohydraulic control mode consists of mainly a main valve body, a pilot operated valve and a filter. The main valve body is provided with non-return valve assembly, main valve assembly and thrust piston, as well as energy accumulator joint, high pressure liquid outlet joint, unloading back liquid joint and solenoid valve; and the pilot operated valve has electrohydraulic switching valve with communicated liquid path in the bottom. The electrohydraulic unloading valve has two functions, including conveying high pressure emulsion during the operation of the work face support and loading the emulsion pump during stopping the work face support. It has expanded use range in both fully mechanized coal winning work face and common coal winning work face, high reliability, simple and compact structure and simple operation.

Description

1. Technical field [0001] The invention relates to an electro-hydraulic unloading valve with two working modes of hydraulic control and electro-hydraulic control, and is especially suitable for intelligent monitoring and automatic unloading of emulsion pumps in fully mechanized mining working faces of coal mines. 2. Background technology [0002] At present, the domestic emulsion pump station is not equipped with an intelligent monitoring system, and the key pressure control element on the emulsion pump—the unloading valve all adopts the hydraulic control working mode, and there is no electric hydraulic control working mode, but to realize the hydraulic system of the emulsion pump station It is necessary to have an unloading valve with two working modes of hydraulic control and electro-hydraulic control—electro-hydraulic unloading valve. Therefore, it is urgent to design an electro-hydraulic unloading valve with two working modes of hydraulic control and electro-hydraulic con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02E21D15/51
Inventor 杜长龙石华辉王贤武杨善国闫飞
Owner CHINA UNIV OF MINING & TECH
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