CN200943503Y - Change-over valve with liquid return opening possessing one-way flow function - Google Patents
Change-over valve with liquid return opening possessing one-way flow function Download PDFInfo
- Publication number
- CN200943503Y CN200943503Y CN 200620024612 CN200620024612U CN200943503Y CN 200943503 Y CN200943503 Y CN 200943503Y CN 200620024612 CN200620024612 CN 200620024612 CN 200620024612 U CN200620024612 U CN 200620024612U CN 200943503 Y CN200943503 Y CN 200943503Y
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- CN
- China
- Prior art keywords
- valve
- liquid
- cone
- compression bar
- valve cone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Lift Valve (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
A reversing valve that the liquid return mouth is characterized in uniflow liquid flow relates to a hydraulic component and is applicable to the movable support of the full-mechanized mining face, which is aiming at preventing that the returned liquid between valve elements flows into the working mouth and thus cause the vertical pillars and jacks act by mistakes; the utility model comprises a operating gear, a valve shell and two same two-position three-way valves, the two two-position three-way valves are installed in one valve shell and comprises a return liquid valve housing, a knockout-pin, a guide sleeve, a valve seat, a intake valve housing, a spring, a plug, a seal, an intake valve core component and a return liquid compression bar component; the return liquid compression bar component includes a compression bar, a valve cone, a small spring and a seal ring, the small spring is arranged on the valve cone and installed in the compression bar together with the valve cone, the valve cone is provided with a sealing ring and the compression bar is against the pressing block of the operating gear; the gap between the valve cone and the knockout-pin is sealed when the operating gear is at the intermediate position.
Description
Technical field
The utility model relates to a kind of Hydraulic Elements that are used to control hydraulic support.
Background technology
Existing hydraulic support reversal valve, its structure mainly are made up of operating mechanism, valve casing and two identical two position three-way valves, and two two position three-way valves are contained in the valve casing, are controlled respectively by an operating mechanism.This reversal valve is in use big because of returning the liquid resistance sometimes, returns liquid between the valve block and seals in working hole and make column and jack misoperation occur, influences the operate as normal of support.
Summary of the invention
The purpose of this utility model overcomes above-mentioned the deficiencies in the prior art exactly, and a kind of reversal valve that liquid return hole that liquid seals in working hole has unidirectional liquid stream function that prevents between the valve block to return is provided.
The utility model includes operating mechanism, valve casing and two identical two position three-way valves, and two two position three-way valves are contained in the valve casing; Operating mechanism includes cam, briquetting and handle; Two position three-way valve includes liquid return valve jacket, push rod, fairlead, valve seat, feed liquor valve pocket, spring, screw plug and seal, feed liquor core assembly and returns hydraulic ram assemblies, and the feed liquor core assembly comprises feed liquor valve body, sealing mat and swivel nut; Return hydraulic ram assemblies and comprise depression bar, valve cone, little spring and joint ring, little spring is enclosed within on the valve cone, and in valve cone is contained in depression bar, is with joint ring on the valve cone, and depression bar withstands on the operating mechanism briquetting; Under operating mechanism meta state, seal between valve cone and the push rod.
The valve body both sides are respectively equipped with working hole " A " and " B ", and the valve body middle part is provided with pump liquid inlet " P " and liquid return hole " O ".
The utility model is applicable on fully-mechanized mining working cantilever support and fully-mechanized mining working surface hydraulic support as liquid flow distribution Hydraulic Elements.The utility model can prevent to return between the valve block liquid and seal in working hole, thereby prevents that misoperation from appearring in column and jack, influences the operate as normal of support.
Description of drawings
Fig. 1 is the utility model structural representation.
Among the figure: 1, operating mechanism, 2, the feed liquor core assembly, 3, depression bar, 4, little spring, 5, valve cone, 6, joint ring, 7, push rod, 8, fairlead, 9, valve seat, 10, the feed liquor valve pocket, 11, valve casing, 12, screw plug, 13, spring, 14, liquid return valve jacket, 15, the operating mechanism briquetting.
The specific embodiment
When operating mechanism 1 handle during in the centre position, the pressure effect that feed liquor core assembly 2 enters liquid at spring 13 and " P " mouth down and valve seat 9 close, sealed highly pressurised liquid, return in the hydraulic ram assemblies valve cone 5 under little spring 4 effects with push rod 7 end face seals, can prevent that the liquid that returns in " O " mouthful from sealing in the push rod chamber and enter working hole " A " (or " B ").When operating mechanism 1 handle plate when working hole " A " (or " B "), returning hydraulic ram assemblies moves, compress valve cone 5 earlier, promote push rod 7 and open the sealing of feed liquor core assembly 2 and valve seat 9 again, working solution flows to the column working chamber by " P " mouth by valve seat 9, working hole " A " (or " B "), another chamber liquid of column is opened valve cone 5 by working hole " B " (or " A ") through push rod 7, through " O " mouthful inflow liquid back pipe road.After hours, operating mechanism 1 handle pulls to the centre position, makes feed liquor core assembly 2 recover closed condition.
Claims (1)
1, a kind of liquid return hole has the reversal valve of unidirectional liquid stream function, comprise operating mechanism, valve casing and two identical two position three-way valves, two two position three-way valves are contained in the valve casing, and two position three-way valve includes liquid return valve jacket, push rod, fairlead, valve seat, feed liquor valve pocket, spring, screw plug and seal, feed liquor core assembly and returns hydraulic ram assemblies; It is characterized in that back that hydraulic ram assemblies comprises depression bar, valve cone, little spring and joint ring, little spring is enclosed within on the valve cone, and in valve cone is contained in depression bar, is with joint ring on the valve cone, and depression bar withstands on the operating mechanism briquetting; Under operating mechanism meta state, seal between valve cone and the push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620024612 CN200943503Y (en) | 2006-06-02 | 2006-06-02 | Change-over valve with liquid return opening possessing one-way flow function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620024612 CN200943503Y (en) | 2006-06-02 | 2006-06-02 | Change-over valve with liquid return opening possessing one-way flow function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200943503Y true CN200943503Y (en) | 2007-09-05 |
Family
ID=38718136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620024612 Expired - Fee Related CN200943503Y (en) | 2006-06-02 | 2006-06-02 | Change-over valve with liquid return opening possessing one-way flow function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200943503Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536275A (en) * | 2012-01-12 | 2012-07-04 | 中煤北京煤矿机械有限责任公司 | Manual reversing main operation valve for hydraulic support of thin seam |
-
2006
- 2006-06-02 CN CN 200620024612 patent/CN200943503Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536275A (en) * | 2012-01-12 | 2012-07-04 | 中煤北京煤矿机械有限责任公司 | Manual reversing main operation valve for hydraulic support of thin seam |
| CN102536275B (en) * | 2012-01-12 | 2014-04-02 | 中煤北京煤矿机械有限责任公司 | Manual reversing main operation valve for hydraulic support of thin seam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070905 Termination date: 20100602 |