CN203560473U - Anti-scouring double-sealing structure for valve - Google Patents
Anti-scouring double-sealing structure for valve Download PDFInfo
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- CN203560473U CN203560473U CN201320742649.1U CN201320742649U CN203560473U CN 203560473 U CN203560473 U CN 203560473U CN 201320742649 U CN201320742649 U CN 201320742649U CN 203560473 U CN203560473 U CN 203560473U
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- main valve
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Abstract
The utility model discloses an anti-scouring double-sealing structure for a valve. The anti-scouring double-sealing structure for the valve comprises a valve body (1), a valve element (2) and a valve rod (3). The anti-scouring double-sealing structure for the valve is characterized in that the valve element (2) is composed of a main valve element (2.2) and an auxiliary valve element (2.1), one end of the main valve element (2.2) is fixedly connected with the valve rod (3), a groove (5) is formed in the other end of the main valve element (2.2), one end of the auxiliary valve element (2.1) is connected with the main valve element (2.2) through the groove (5), an elastic piece (4) is arranged between the main valve element (2.2) and the auxiliary valve element (2.1), and the auxiliary valve element (2.1) can vertically move in the groove (5) in a limited stroke; a plane flexible sealing structure is arranged between the main valve element (2.2) and the valve body (1) and the other end of the auxiliary valve element (2.1) is in contact seal with an auxiliary valve seat (1a) in a channel of the valve body (1). According to the anti-scouring double-sealing structure for the valve, the main valve element and the auxiliary valve element are not opened and closed synchronously, so that the scour of the flexible seal by a high-speed medium in the opening and closing process is greatly reduced. The anti-scouring double-sealing structure for the valve is simple in structure, good in sealing performance and long in service life.
Description
Technical field
The utility model belongs to valve technology field, particularly a kind of Anti-erosion double sealing structure that is applicable to the valve in the swiftly flowing pipeline of medium.
Background technique
The performance of valve, depends primarily on sealing and the working life of its spool and valve seat.For blocking and throttling of high speed medium, the sealing configuration performance requirement of valve is higher.Adopt soft sealing structure, good seal performance, but erosion resistance not; Hard sealing built-up welding abrasion resistance alloy, erosive wear resistance improves, but will reach higher sealability, to manufacturing having relatively high expectations of processing.At present, for the valve of high speed medium, conventionally adopt the structure of sealing surface weld deposit abrasion resistance alloy, except manufacturing the degree of difficulty of processing, because the high speed of medium is washed away, particularly when in the process that valve is opening and closing or while being operated in little aperture, even pure medium, the damage of sealing surface is still very serious, makes the working life of valve generally shorter.
Summary of the invention
In order to solve above-mentioned deficiency, the utility model patent discloses a kind of valve Anti-erosion double sealing structure.This sealing structure performance is good, and can effectively alleviate the erosion attack of high speed medium to sealing surface, extends valve working life.
It is as described below that the utility model solves the technological scheme that its technical problem adopts.
Valve Anti-erosion double sealing structure described in the utility model is comprised of spool, valve seat and valve rod, it is characterized in that spool is comprised of main valve plug and auxiliary valve core, main valve plug one end is fixedly connected with valve rod, the other end is processed with groove, auxiliary valve core one end is connected with main valve plug by groove, between main valve plug and auxiliary valve core flexible, auxiliary valve core can do limited the moving up and down of stroke in groove; Between main valve plug and valve body, be plane soft seal, the auxiliary valve core the other end contacts sealing with the auxiliary-seat in valve channel.
In such scheme, main valve plug overall structure can be the various ways such as disk.
In such scheme, between main valve plug and valve body, be sealed into plane soft seal, its specific implementation form is various, as fixedly mounted soft seal circle on the sealing surface of main valve plug, has the main valve seat matching with soft seal circle on valve body.
In such scheme, the seal form of auxiliary valve core and auxiliary-seat can be hard sealing structure, also can be soft sealing structure, as fixedly mounted soft seal circle on the sealing surface of auxiliary valve core, has the auxiliary-seat boss coordinating with it in valve channel.
In such scheme, the elastic component between main valve plug and auxiliary valve core can be spring, also can be rubber pad elastomeric material.
During valve opening, actuator's band ovable valve stem moves up, and valve rod drives main valve plug to take the lead in leaving main valve seat, now because auxiliary valve core and auxiliary-seat still keep sealing, fail to form MEDIA FLOW circulation passage, after main valve plug moves up certain distance, auxiliary valve core is just opened, and forms MEDIA FLOW circulation passage.Because main valve plug now has left main valve seat sealing surface certain distance, thereby make soft seal circle can not be operated in little aperture state, high speed medium also can weaken greatly to the erosion of soft seal, thereby has effectively protected soft sealing structure.
During valve closing, valve rod drives main valve plug, auxiliary valve core to move down together, and first auxiliary valve core contacts sealing with auxiliary-seat, main valve plug continues to move down after a segment distance, main valve plug contacts sealing with valve seat, meanwhile, main valve plug is pressed on auxiliary valve core on auxiliary-seat by compression elastic piece.In this closing process, before closing at main valve plug, auxiliary valve core is closed, and makes soft sealing structure avoid being operated in little aperture situation, has effectively slowed down erosion.
Because throttling process mainly realizes by auxiliary valve core, even if therefore produce cavitation phenomenons, also can after crossing auxiliary valve core, MEDIA FLOW occur.
In addition,, in general soft sealing structure, the size from the power of closing of actuator owing to closing is uncontrollable, when closing, may soft sealing face be damaged by pressure because the power of closing is excessive; If valve is for a long time in closed condition, soft sealing face has the possibility that produces permanent deformation, and these all likely cause the inefficacy of sealing configuration.And in this structure, hard valve seat has been born part and closed power, and in closing process, the elastic component between major-minor spool can play certain buffer function, thereby has avoided well the generation of these situations.
The beneficial effects of the utility model are as described below.
In 1 sealing structure, adopt plane soft sealing structure, good seal performance, can reach zero leakage.
2 by valve in opening-closing process, the asynchronous action of major-minor spool, has avoided soft sealing structure to be subject to huge erosion when the little aperture of valve, has effectively protected soft sealing structure, thereby has improved sealing reliability and the working life of valve.
In 3 sealing structures, the quality of fit of auxiliary valve core and auxiliary-seat is required to decrease, reduced difficulty of processing.
4 is simple in structure, and processing cost is low, is convenient to implement.
Accompanying drawing explanation
Structural representation when Fig. 1 valve Anti-erosion double sealing structure is opened.
Structural representation when Fig. 2 valve Anti-erosion double sealing structure is closed.
The valve core structure schematic diagram of Fig. 3 valve Anti-erosion double sealing structure.
The structural representation when auxiliary valve core of Fig. 4 valve Anti-erosion double sealing structure and auxiliary-seat are soft seal.
A kind of structural representation of the main valve plug groove of Fig. 5 valve Anti-erosion double sealing structure.
The another kind of structural representation of the main valve plug groove of Fig. 6 valve Anti-erosion double sealing structure.
A kind of sealed structural representation between main valve plug and the valve body of Fig. 7 valve Anti-erosion double sealing structure.
In figure: 1 valve body, 1a auxiliary-seat, 1b main valve seat, 1c auxiliary-seat boss, 2 spools, 2.1 auxiliary valve cores, 2.2 main valve plugs, 2.2a boss, 2.2b main valve plug main body, 2.2c cover plate, 2.2d main valve plug boss, 3 valve rods, 4 elastic components, 5 grooves, 6 seal ring 1,7 seal ring 2,8 seal rings 3.
Embodiment
For the utility model of better explaining, below in conjunction with drawings and Examples, carry out concrete elaboration.
Embodiment one
As shown in Figure 1 and Figure 2, valve sealing structure comprises valve body (1), spool (2), valve rod (3).Spool (2) is comprised of main valve plug (2.2) and auxiliary valve core (2.1), main valve plug (2.2) one end is fixedly connected with valve rod (3), the other end is processed with groove (5), in groove (5) outer end edges, there is boss (2.2a), auxiliary valve core (2.1) one end is connected with main valve plug (2.2) by groove (5), between main valve plug (2.2) and auxiliary valve core (2.1) flexible (4), auxiliary valve core (2.1) can do limited the moving up and down of stroke in groove (5); On the sealing surface of main valve plug, be installed with soft seal circle 1 (6), on valve body (1), have the main valve seat (1.2) matching with soft seal circle 1 (6), auxiliary valve core (2.1) the other end contacts sealing with auxiliary-seat (1a) conical surface in valve body (1) passage.
The course of action of sealing structure is: while closing, the band ovable valve stem (3) of actuator, main valve plug (2.2), auxiliary valve core (2.1) entirety move down, auxiliary valve core (2.1) takes the lead in contacting with auxiliary-seat (1a) conical surface, valve rod (3) continues to move down after a segment distance with main valve plug (2.2), the upper seal ring 1 (6) of main valve plug (2.2) contacts sealing with main valve seat (1b), meanwhile, main valve plug (2.2) is pressed on auxiliary valve core (2.1) on auxiliary-seat (1a) by spring action.In this closing process, before closing at main valve plug (2.2), auxiliary valve core (2.1) is closed, and makes soft sealing structure avoid being operated in little aperture situation, has effectively slowed down erosion.
During unlatching, valve rod (3) moves up, drive main valve plug (2.2) to take the lead in leaving main valve seat (1b), now auxiliary valve core (2.1) still keeps sealing with auxiliary-seat (1a), fail to form medium circulation, after main valve plug (2.2) moves up certain distance, drive again auxiliary valve core (2.1) to open, form medium circulation.Because main valve plug (2.2) now has left main valve seat (1b) certain distance; thereby make soft seal circle 1 (6) can not be operated in little aperture state; high speed medium also can weaken greatly to the erosion of soft seal circle 1 (6); thereby effectively protected soft sealing structure, extended valve working life.
Embodiment two
This example as shown in Figure 4, fixedly mounts soft seal circle 2(7 on the sealing surface of auxiliary valve core (2.1)), in valve channel, there is the auxiliary-seat boss (1c) coordinating with it, all the other are with embodiment one.
Embodiment three
This example as shown in Figure 5, for ease of the assembling of auxiliary valve core (2.1), main valve plug (2.2) can be in the upper machined grooves (5) of main valve plug main body (2.2b), groove (5) end face is fixedly connected with cover plate (2.2c), cover plate (2.2c) Wei center has the slab structure of through hole, its outer rim is concordant with main valve plug (2.2) outer rim, inner edge is slightly wider than main valve plug groove (5) inward flange, and all the other are with embodiment one.
Embodiment four
As shown in Figure 6, main valve plug (2.2) is fixedly connected with by elastic component (4) with auxiliary valve core (2.1) this example, and the distance that auxiliary valve core (2.1) moves up and down in groove (5) no longer limits by groove (5).In opening-closing process, elastic component (4) needs bearing tension and pressure respectively, and all the other are with embodiment one.
Embodiment five
This example as shown in Figure 7, has main valve plug boss (2.2d) on main valve plug, is installed with soft seal circle 3(8 on valve body) coordinate with it.All the other are with embodiment one.
Finally it should be noted that, this embodiment is only for better explaining the utility model and unrestricted using scope of the present utility model.It will be understood by those of skill in the art that the technical solution of the utility model is modified or is equal to replacement, and do not depart from aim of the present utility model and scope, all should be encompassed in the middle of protection domain of the present utility model.
Claims (3)
1. a valve Anti-erosion double sealing structure, mainly comprise valve body (1), spool (2), valve rod (3), it is characterized by: spool (2) is comprised of main valve plug (2.2) and auxiliary valve core (2.1), main valve plug (2.2) one end is fixedly connected with valve rod (3), the other end is processed with groove (5), auxiliary valve core (2.1) one end is connected with main valve plug (2.2) by groove (5), between main valve plug (2.2) and auxiliary valve core (2.1) flexible (4), auxiliary valve core (2.1) can do limited the moving up and down of stroke in groove (5), between main valve plug (2.2) and valve body (1), be plane soft sealing structure, auxiliary valve core (2.1) the other end contacts sealing with the auxiliary-seat (1a) in valve body (1) passage.
2. a kind of valve Anti-erosion double sealing structure according to claim 1, is characterized in that contacting between auxiliary valve core (2.1) and auxiliary-seat (1a) is sealed into hard sealing or soft seal.
3. a kind of valve Anti-erosion double sealing structure according to claim 1, it is characterized in that main valve plug (2.2) one end is fixedly connected with valve rod (3), the other end is processed with groove (5), in groove (5) outer end edges, has boss (2.2a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320742649.1U CN203560473U (en) | 2013-11-22 | 2013-11-22 | Anti-scouring double-sealing structure for valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320742649.1U CN203560473U (en) | 2013-11-22 | 2013-11-22 | Anti-scouring double-sealing structure for valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203560473U true CN203560473U (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320742649.1U Expired - Fee Related CN203560473U (en) | 2013-11-22 | 2013-11-22 | Anti-scouring double-sealing structure for valve |
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| CN (1) | CN203560473U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591318A (en) * | 2013-11-22 | 2014-02-19 | 四川大学 | Erosion-resistant dual-sealing valve structure |
| CN106090249A (en) * | 2016-08-24 | 2016-11-09 | 南京长江工业炉科技有限公司 | A kind of fast dispersing valve of tin liquor fusing stove |
| WO2017133428A1 (en) * | 2016-02-05 | 2017-08-10 | 北京奥赛旗石油科技开发有限公司 | Combined control valve |
-
2013
- 2013-11-22 CN CN201320742649.1U patent/CN203560473U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591318A (en) * | 2013-11-22 | 2014-02-19 | 四川大学 | Erosion-resistant dual-sealing valve structure |
| WO2017133428A1 (en) * | 2016-02-05 | 2017-08-10 | 北京奥赛旗石油科技开发有限公司 | Combined control valve |
| CN106090249A (en) * | 2016-08-24 | 2016-11-09 | 南京长江工业炉科技有限公司 | A kind of fast dispersing valve of tin liquor fusing stove |
| CN106090249B (en) * | 2016-08-24 | 2018-08-24 | 南京长江工业炉科技有限公司 | A kind of fast dispersing valve of tin liquor melting furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20201122 |