CN103591318A - Erosion-resistant dual-sealing valve structure - Google Patents
Erosion-resistant dual-sealing valve structure Download PDFInfo
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- CN103591318A CN103591318A CN201310592861.9A CN201310592861A CN103591318A CN 103591318 A CN103591318 A CN 103591318A CN 201310592861 A CN201310592861 A CN 201310592861A CN 103591318 A CN103591318 A CN 103591318A
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- valve
- auxiliary
- valve element
- erosion
- main valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses an erosion-resistant dual-sealing valve structure. The erosion-resistant dual-sealing valve structure comprises a valve body (1), a valve element (2) and a valve rod (3), and is characterized in that the valve element (2) is composed of a primary valve element (2.2) and a secondary valve element (2.1), one end of the primary valve element (2.2) is fixedly connected with the valve rod (3), a groove (5) is machined in the other end of the primary valve element (2.2), one end of the secondary valve element (2.1) is connected with the a primary valve element (2.2) through the groove (5), an elastic piece (4) is arranged between the primary valve element (2.2) and the secondary valve element (2.1), and the secondary valve element (2.1) can do vertical movement in a limited stroke mode in the groove (5); a plane soft seal structure is arranged between the primary valve element (2.2) and the valve body (1), and the other end of the secondary valve element (2.1) and a secondary valve seat (1a) in a channel of the valve body (1) are sealed in a contact mode. Due to the non-synchronous opening and closing of the primary valve element and the secondary valve element, erosion, caused by high-speed media, of the soft seal in the opening and closing processes is greatly reduced. The erosion-resistant dual-sealing valve structure is simple, good in sealing performance and long in service life.
Description
Technical field
The invention 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 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, patent of the present invention 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.
The technical solution adopted for the present invention to solve the technical problems is as described below.
Valve Anti-erosion double sealing structure of the present invention 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 be done 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.
Valve opening Shi， actuator 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 the power of partly closing, 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.
Beneficial effect of the present invention is 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.
The main valve plug of Fig. 7 valve Anti-erosion double sealing structure and a kind of sealed structural representation between valve body.
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 present invention that better explains, 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 be done 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) integral body 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, assembling for ease 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, and 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 present invention and unrestricted using scope of the present invention.It will be understood by those of skill in the art that technological scheme of the present invention is modified or is equal to replacement, and do not depart from aim of the present invention and scope, all should be encompassed in the middle of protection scope of the present invention.
Claims (3)
1. a valve Anti-erosion double sealing structure, mainly comprises 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 be done 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, is characterized in that main valve plug (2.2) one end is fixedly connected with valve rod (3), and 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 |
|---|---|---|---|
| CN201310592861.9A CN103591318A (en) | 2013-11-22 | 2013-11-22 | Erosion-resistant dual-sealing valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310592861.9A CN103591318A (en) | 2013-11-22 | 2013-11-22 | Erosion-resistant dual-sealing valve structure |
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| CN103591318A true CN103591318A (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310592861.9A Pending CN103591318A (en) | 2013-11-22 | 2013-11-22 | Erosion-resistant dual-sealing valve structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134973A (en) * | 2015-10-14 | 2015-12-09 | 泉州市中天石油化工机械制造有限公司 | Double-seal ring for high-temperature high-pressure pipelines |
| CN107013693A (en) * | 2017-06-16 | 2017-08-04 | 山东益都阀门集团股份有限公司 | A kind of double spool linkage valve |
| 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 |
| CN108895168A (en) * | 2018-08-13 | 2018-11-27 | 四川大学 | Pressure maintaining cylinder lower end sealing structure |
| CN109027274B (en) * | 2017-06-08 | 2020-03-17 | 中核苏阀科技实业股份有限公司 | Bimetal seal elastic anti-scouring structure and stop valve thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4254792A (en) * | 1978-08-26 | 1981-03-10 | Holstein & Kappert Gmbh | Double-seat valve |
| CN2906226Y (en) * | 2006-04-19 | 2007-05-30 | 黄依华 | Leakproof valve structure |
| CN2929372Y (en) * | 2006-06-26 | 2007-08-01 | 贵州精高电力物资有限公司 | Double core double seat free-flushing stop valve |
| CN101818810A (en) * | 2010-01-25 | 2010-09-01 | 江苏新中环保股份有限公司 | Double sealing lift valve used in pipeline of dust collector |
| CN202418602U (en) * | 2011-12-07 | 2012-09-05 | 洪永忠 | Double-sealed stop valve |
| CN203009846U (en) * | 2012-11-14 | 2013-06-19 | 天津市七星精密机械有限公司 | Corrosion-resistant stop valve |
| CN203560473U (en) * | 2013-11-22 | 2014-04-23 | 四川大学 | Anti-scouring double-sealing structure for valve |
-
2013
- 2013-11-22 CN CN201310592861.9A patent/CN103591318A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4254792A (en) * | 1978-08-26 | 1981-03-10 | Holstein & Kappert Gmbh | Double-seat valve |
| CN2906226Y (en) * | 2006-04-19 | 2007-05-30 | 黄依华 | Leakproof valve structure |
| CN2929372Y (en) * | 2006-06-26 | 2007-08-01 | 贵州精高电力物资有限公司 | Double core double seat free-flushing stop valve |
| CN101818810A (en) * | 2010-01-25 | 2010-09-01 | 江苏新中环保股份有限公司 | Double sealing lift valve used in pipeline of dust collector |
| CN202418602U (en) * | 2011-12-07 | 2012-09-05 | 洪永忠 | Double-sealed stop valve |
| CN203009846U (en) * | 2012-11-14 | 2013-06-19 | 天津市七星精密机械有限公司 | Corrosion-resistant stop valve |
| CN203560473U (en) * | 2013-11-22 | 2014-04-23 | 四川大学 | Anti-scouring double-sealing structure for valve |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134973A (en) * | 2015-10-14 | 2015-12-09 | 泉州市中天石油化工机械制造有限公司 | Double-seal ring for high-temperature high-pressure pipelines |
| CN105134973B (en) * | 2015-10-14 | 2017-11-03 | 泉州市中天石油化工机械制造有限公司 | Double-seal valve for high-temperature and pressure pipeline |
| 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 |
| CN109027274B (en) * | 2017-06-08 | 2020-03-17 | 中核苏阀科技实业股份有限公司 | Bimetal seal elastic anti-scouring structure and stop valve thereof |
| CN107013693A (en) * | 2017-06-16 | 2017-08-04 | 山东益都阀门集团股份有限公司 | A kind of double spool linkage valve |
| CN108895168A (en) * | 2018-08-13 | 2018-11-27 | 四川大学 | Pressure maintaining cylinder lower end sealing structure |
| CN108895168B (en) * | 2018-08-13 | 2023-10-03 | 四川大学 | Lower end sealing structure of pressure maintaining cylinder |
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Application publication date: 20140219 |