CN202064970U - High-flow safety valve - Google Patents
High-flow safety valve Download PDFInfo
- Publication number
- CN202064970U CN202064970U CN2011201021721U CN201120102172U CN202064970U CN 202064970 U CN202064970 U CN 202064970U CN 2011201021721 U CN2011201021721 U CN 2011201021721U CN 201120102172 U CN201120102172 U CN 201120102172U CN 202064970 U CN202064970 U CN 202064970U
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- CN
- China
- Prior art keywords
- valve
- spring
- spool
- casing
- valve body
- 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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Abstract
The utility model discloses a high-flow safety valve, which comprises a valve casing and a valve body. A valve seat is arranged in a valve port of the valve body, a valve spool is arranged in the valve body, the outer wall of the valve spool is provided with a sealing ring and an O-shaped ring, the outer wall of the valve seat is provided with the sealing ring, a spring seat is arranged in a casing opening of the valve body, the outer wall of the spring seat is provided with double sealing rings, a screw is arranged in a casing opening at the other end of the valve casing, a semicircular boss is formed on one surface of the spring seat, the valve spool is abutted to the semicircular boss of the spring seat, one end of a spring in the valve casing is connected onto the spring seat, and the other end of the spring is fixed onto the screw. The high-flow safety valve is reliable in performance, high in flow, quick in unloading and fine in sealing property, is simultaneously capable of ensuring single axial action of the return spring, and can guarantee constant-resistance operation characteristic and timely unloading performance of a cylinder of a hydraulic support on the coal mine full mechanized mining surface to a great degree.
Description
Technical field
The utility model relates to coal mine fully-mechanized mining the valve for roof support field, is specially a kind of high-flow safety valve of hydraulic support.
Background technology
Implement and development along with coal mine fully-mechanized mining is large-scale; it is also more and more stricter to the requirement of hydraulic support to combine the work of adopting; so just the safety valve to the protective cradle hydraulic jack has had further requirement; especially application life and the reliability to safety valve had further requirement; when the pressure from the hydraulic support top causes by power; can safety valve bear under the situation of high pressure, and the short time, in time abundant stable off-load directly influenced the application life and the supporting safety of support.It not only can damage seal, pipeline and Hydraulic Elements, but also can cause vibrations and noise; Sometimes make some pressure controlled Hydraulic Elements produce error.The safety valve that uses is because most of straight unloading way that adopts at present; adopt single O RunddichtringO sealing; spool moves the off-load aperture O RunddichtringO that often rubs back and forth makes the sealing ring breakage easily; safety valve lost efficacy; the problems such as spring dislocation that traditional in addition safety valve spring seat can not avoid radial action to cause; may cause the Spring Card other problems of waiting indefinitely, also have spring under unprotected situation, to be subjected to the hydraulic fluid corrosion to influence problems such as life-span.
The utility model content
The purpose of this utility model provides a kind of high-flow safety valve, and is low application life with the safety valve O RunddichtringO that solves prior art, and spring is subjected to the stuck and spring in the axial left and right sides not protect the problem that easily is corroded.
In order to achieve the above object, the technical scheme that the utility model adopted is:
A kind of high-flow safety valve, include valve casing, be installed in the valve body at valve casing one end housing mouth place, it is characterized in that: be equipped with valve seat in described valve body and the valve port that valve casing is connected, be slidingly fitted with spool in the valve body, described spool one end passes valve seat, and the outer wall that spool combines with valve seat is disposed with sealing ring, O type circle, described valve seat outer wall also is provided with sealing ring, described valve casing is equipped with in the faucal of valve body the spring base that cooperates with spool is installed, described spring base outer wall is equipped with the double density seal, screwed togather screw in the valve casing other end faucal, described spring base forms semicircle boss towards the one side of valve body, and described spool passes the termination of valve seat and replaces on the semicircle boss of spring base, is arranged in valve casing and is provided with spring, described spring one end is connected on the spring base, and the other end is fixed on the screw.
The utility model comprises the valve body of interconnect function, it is the safety valve spool of plane stability structure that valve inner has the top, the cylindrical of spool has the sealing ring of high-strength abrasion-proof composite plastic, seal ring with outer has O type circle to make safe spool positiver sealing for sealing ring pressure again, valve seat one side and the cooperation of O type circle near valve body prevent that liquid from axially overflowing, and add a sealing ring at cylindrical on the other hand and prevent that liquid from radially overflowing.Adopt axial double containment between spring base cylindrical and the valve casing, prevent that spring is corroded by hydraulic fluid, the pressure that spool is come of accepting that hemispherical dome structure can be multi-faceted is adopted on top, spring base center in addition, safe and reliable maintenance the axial action of spring, prevent to be subjected to radial load to cause stuck or system disorders.The screw that spring end is used by pressure regulation is integrated whole safety valve.
The utility model dependable performance, flow is big, and off-load is rapid, and closure is good, guarantees the axial action that back-moving spring is single simultaneously, can guarantee to a great extent that the oil cylinder of coal mine fully-mechanized mining working hydraulic support has constant-resistance operating characteristic and timely unloading performance.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
As shown in Figure 1.A kind of high-flow safety valve, the valve body 1 that comprises interconnect function, it is the safety valve spool 2 of plane stability structure that there is the top valve body 1 inside, the cylindrical of spool 2 has the sealing ring 3 of high-strength abrasion-proof composite plastic, sealing ring 3 cylindricals have O type circle to make safe spool 2 positiver sealings for sealing ring 3 pressure again, valve seat 4 one side and sealing ring 3 cooperations near valve body 1 prevent that liquid from axially overflowing, and add an O type circle at cylindrical on the other hand and prevent that liquid from radially overflowing.Adopt axial double containment between spring base 5 cylindricals and the valve casing 6, prevent that spring 7 is corroded by hydraulic fluid, the pressure that spool 2 is come of accepting that hemispherical dome structure can be multi-faceted is adopted on top, spring base 5 center in addition, safe and reliable maintenance the axial action of spring 7, prevent to be subjected to radial load to cause stuck or system disorders.The screw 8 that spring 7 ends are used by pressure regulation is integrated whole safety valve.
The utility model product is connected with the hydraulic support oil cylinder, when the support cylinder force surpasses the pressure that spring sets up, spool promotes spring base and moves to afterbody under pressure promotes, when the unloading hole on the spool moves past special sealing ring, high-pressure work liquid is discharged from the unloading hole on the valve casing, because there is sealing performance reliably spring base and valve casing inside, highly pressurised liquid does not enter the spring working chamber.At this moment the pressure in the oil cylinder can reduce along with off-load, and when the pressure of oil cylinder during less than the power of spring, safety valve is resetted by spring action, recovers sealing state.
Claims (1)
1. high-flow safety valve, include valve casing, be installed in the valve body at valve casing one end housing mouth place, it is characterized in that: be equipped with valve seat in described valve body and the valve port that valve casing is connected, be slidingly fitted with spool in the valve body, described spool one end passes valve seat, and the outer wall that spool combines with valve seat is disposed with sealing ring, O type circle, described valve seat outer wall also is provided with sealing ring, described valve casing is equipped with in the faucal of valve body the spring base that cooperates with spool is installed, described spring base outer wall is equipped with the double density seal, screwed togather screw in the valve casing other end faucal, described spring base forms semicircle boss towards the one side of valve body, and described spool passes the termination of valve seat and replaces on the semicircle boss of spring base, is arranged in valve casing and is provided with spring, described spring one end is connected on the spring base, and the other end is fixed on the screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201021721U CN202064970U (en) | 2011-04-08 | 2011-04-08 | High-flow safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201021721U CN202064970U (en) | 2011-04-08 | 2011-04-08 | High-flow safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202064970U true CN202064970U (en) | 2011-12-07 |
Family
ID=45058838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201021721U Expired - Fee Related CN202064970U (en) | 2011-04-08 | 2011-04-08 | High-flow safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202064970U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168569A (en) * | 2011-04-08 | 2011-08-31 | 巨隆集团芜湖兴隆液压有限公司 | High-flow safety valve |
-
2011
- 2011-04-08 CN CN2011201021721U patent/CN202064970U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168569A (en) * | 2011-04-08 | 2011-08-31 | 巨隆集团芜湖兴隆液压有限公司 | High-flow safety valve |
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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: 20111207 Termination date: 20140408 |