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Multilevel control valve

A technology of control valve and control cavity, applied in mining equipment, earth-moving, pillar/support, etc., can solve the problems of difficult processing and difficult control of balance, achieve easy processing, and realize multi-cylinder pressure follow-up. , to ensure the effect of carrying capacity

Inactive Publication Date: 2008-05-07
SICHUAN AEROSPACE FENGHUO SERVO CONTROL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In foreign countries, the German DBT company has carried out research on multi-stage control valves, but the products of DBT company are difficult to process, and the balance is not easy to control, and must be used in conjunction with a special column hydraulic control check valve

Method used

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Examples

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Embodiment Construction

[0025] The multi-stage control valve of the present invention includes a first-stage reversing valve assembly and a second-stage safety valve assembly. The reversing valve assembly includes a reversing valve inlet chamber connected to the hydraulic support balance cylinder, a reversing valve control chamber connected to the hydraulic support column cylinder, and a reversing valve return chamber connected to the safety valve assembly. The reversing valve spool and valve sleeve in the reversing valve assembly are installed in the reversing joint of the reversing valve assembly. The valve assembly adjusts the reversing joint that cooperates with the reversing push rod of the reversing valve assembly under the action of the predetermined load of the spring. The safety valve assembly includes the inlet chamber of the safety valve assembly connected to the outlet chamber of the reversing valve assembly, the liquid return chamber of the safety valve assembly directly emptied, and als...

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Abstract

The invention discloses a multilevel control valve, comprising a reversing valve component, a safety valve component and a valve body; wherein, the reversing valve component comprises a reversing valve liquid intake cavity communicated to a balance cylinder of a hydraulic support, a reversing valve control cavity communicated to an upright column cylinder of the hydraulic support and reversing valve liquid return cavity communicated to the safety valve component, a valve core and a valve sleeve positioned inside the reversing valve component, an adjusting spring for the reversing valve component which is arranged inside the reversing joint of the reversing valve component and puts the predetermined load on the reversing valve core through the a spring base and an ejection pin, and a reversing joint matched with the reversing ejector pin under the action of the predetermined load of the adjusting spring in the reversing valve component; the safety valve component comprises a liquid intake cavity connected with the reversing valve liquid outlet cavity used to empty the reversing valve liquid return cavity, a valve core of the safety valve, a valve spring of the safety valve and a safety valve guiding piston matched with the valve core of the safety valve under the action of the predetermined load of the valve spring of the safety valve. The invention has the advantages of prolonging the service life of the high hydraulic support balance cylinder, improving the stability of the gesture adjusting of the hydraulic support and guaranteeing the safe operation of the hydraulic support.

Description

technical field [0001] The invention relates to a multi-stage control valve, in particular to a multi-stage control valve used for hydraulic supports in coal mine fully mechanized mining support equipment. Background technique [0002] Hydraulic support is one of the main equipment to realize the production automation of fully mechanized mining face. The use of hydraulic support can realize the automatic control of production equipment in fully mechanized mining face, improve the production efficiency of the working face, improve the production conditions of the working face, and achieve the purpose of safe production. [0003] At present, in the usual hydraulic support, 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 safety valve remains open for a long time. stat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D15/51E21D23/16
Inventor 刘雪垠孙超肖兰芳
Owner SICHUAN AEROSPACE FENGHUO SERVO CONTROL TECH CO LTD
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