CN101994845A - Double seal structure of plunger valve - Google Patents
Double seal structure of plunger valve Download PDFInfo
- Publication number
- CN101994845A CN101994845A CN 201010535400 CN201010535400A CN101994845A CN 101994845 A CN101994845 A CN 101994845A CN 201010535400 CN201010535400 CN 201010535400 CN 201010535400 A CN201010535400 A CN 201010535400A CN 101994845 A CN101994845 A CN 101994845A
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- seal
- valve
- plunger
- valve seat
- conical surface
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Abstract
The invention relates to a double seal structure of a plunger valve, which mainly adopts the structure that a lower seal ring is arranged in a valve seat hole of a valve body; an isolation ring, an upper seal ring and a valve cover are sequentially arranged on the lower seal ring; and a plunger is arranged in the center of a valve body. The double seal structure of the plunger valve is characterized in that a conical surface of a valve seat hole bottom is arranged in the center of a valve seat hole bottom of the valve body, the cylindrical bottom of the plunger is correspondingly provided with a conical surface of the cylindrical bottom, the taper of the conical surface of the valve seat hole bottom is the same with the taper of the conical surface of the cylindrical bottom, the cylindrical surface of the plunger forms an interference seal pair together with the inner surface of the lower seal ring, and the conical surface of the cylindrical bottom of the plunger forms another seal pair together with the conical surface of the valve seat hole bottom arranged in the center of the valve seat bottom of the valve body. The invention has simple, compact and reasonable structure; the seal pair of the cylindrical surface has soft seal and better seal performance; the conical seal pair has hard seal; when the soft seal fails, the hard seal performs a main seal function. The double seal structure can greatly increase the seal service of the valve.
Description
Technical field
The present invention relates to a kind of double sealing structure of plunger valve, be used for a kind of sealing configuration form of plunger valve specifically, belong to the mechanical structure technical field.
Background technique
In prior art, plunger valve generally all is the purpose that is reached sealing by the sealing pair that cylindrical plunger and seal ring form.Because seal ring is all made by the elasticity nonmetallic material, hardness is low, and sealing surface is scratch easily in some medium, makes seal failure.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, thereby a kind of plunger valve double sealing structure is provided, the sealing structure can increase the sealability of valve greatly, prolongs the sealing life of plunger valve.
According to technological scheme provided by the invention, the double sealing structure of plunger valve comprises valve body, lower seal, last seal ring, spacer ring, valve gap and plunger, in the valve seat orifice of described valve body lower seal is installed, spacer ring is installed on the lower seal successively, last seal ring, valve gap, plunger is installed in the central position of valve body, feature is: the central position of the valve seat orifice bottom surface of described valve body is provided with the conical surface of a valve seat orifice bottom surface, the cylindrical base of described plunger is corresponding to be provided with the conical surface with the cylindrical base of the identical tapering of the conical surface of valve seat orifice bottom surface, the cylndrical surface of described plunger and the internal surface of lower seal form an interference sealing pair, and the conical surface of the valve seat orifice bottom surface at the conical surface of the cylindrical base of plunger and valve body and valve seat bottom center place forms another sealing pair.
Several through holes are offered in the side of described spacer ring.The cylndrical surface of described plunger and the internal surface of last seal ring form sealing pair, play the effect that stops medium to leak to the valve gap place.
Compared with the prior art the present invention has the following advantages:
The present invention is simple in structure, compact, reasonable, and the cylndrical surface sealing pair is soft seal, and sealing is fabulous, and the awl sealing pair is hard sealing, when soft seal was lost efficacy, has sealed main seal action firmly.This kind double sealing structure can increase the sealing life of valve greatly.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
Embodiment
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
As shown in Figure 1: the present invention includes valve body 1, lower seal 2, go up seal ring 3, spacer ring 4, valve gap 5, plunger 6 etc.Lower seal 2 is installed in the valve seat orifice of valve body 1 of the present invention, spacer ring 4 is installed on the seal ring 2 successively, is gone up seal ring 3, valve gap 5, plunger 6 is installed in the central position of valve body 1.The central position of the valve seat orifice bottom surface of described valve body 1 is provided with the conical surface 1-1 of a valve seat orifice bottom surface, and the cylindrical base of described plunger 6 is corresponding to be provided with a conical surface 6-2 with the cylindrical base of the identical tapering of conical surface 1-1 of valve seat orifice bottom surface.The cylndrical surface 6-1 of described plunger 6 and the internal surface 2-1 of lower seal 2 form an interference sealing pair, the conical surface 1-1 of the valve seat orifice bottom surface of the conical surface 6-2 of the cylindrical base of plunger 6 and center, valve body 1 valve seat bottom surface forms another sealing pair, and several through holes 4-1 is offered in the side of spacer ring 4.
Working principle of the present invention and process:
As shown in Figure 1, the present invention is in closed condition, the sealing pair that the conical surface 1-1 of the conical surface 6-2 of the sealing pair of the internal surface 2-1 of the cylndrical surface 6-1 of plunger 6 and lower seal 2 formation at this moment and plunger cylinder bottom and the valve seat orifice bottom surface of valve body forms seals simultaneously, plunger 6 under the drive unit effect to K when mobile, when plunger cylinder face bottom begins to surpass the bottom of through hole 4-1 of spacer ring 4, valve is in opening state, when plunger cylinder face bottom arrives through hole 4-1 upper end, the valve complete opening, this moment, medium was flowed through through hole 4-1 to the flow maximum that exports C from import J, and the sealing pair that the cylndrical surface 6-1 of plunger 6 and the internal surface 3-1 of last seal ring 3 form plays the effect that stops medium to leak to valve gap 5 places.In continuous opening-closing process, plunger 6 can constantly break away from and contact with lower seal 2, and seal ring is that the elasticity nonmetallic material are made, sealing is determined by magnitude of interference, so the internal surface (sealing surface) of lower seal 2 is easy to scratch, make seal failure, this moment, the sealing during valve closing was mainly guaranteed by the conical surface seal pair, thus the sealing life of improving valve.
Claims (3)
1. the double sealing structure of a plunger valve, comprise valve body (1), lower seal (2), last seal ring (3), spacer ring (4), valve gap (5) and plunger (6), lower seal (2) is installed in the valve seat orifice of described valve body (1), spacer ring (4) is installed on the lower seal (2) successively, last seal ring (3), valve gap (5), plunger (6) is installed in the central position of valve body (1), it is characterized in that: the central position of the valve seat orifice bottom surface of described valve body (1) is provided with the conical surface (1-1) of a valve seat orifice bottom surface, the cylindrical base of described plunger (6) is corresponding to be provided with the conical surface (6-2) with the cylindrical base of the identical tapering of the conical surface (1-1) of valve seat orifice bottom surface, the cylndrical surface (6-1) of described plunger (6) forms an interference sealing pair with the internal surface (2-1) of lower seal (2), and the conical surface (6-2) of the cylindrical base of plunger (6) forms a sealing pair with the conical surface (1-1) of the valve seat orifice bottom surface of center, valve body 1 valve seat bottom surface.
2. the double sealing structure of plunger valve according to claim 1 is characterized in that several through holes (4-1) are offered in the side of described spacer ring (4).
3. the double sealing structure of plunger valve according to claim 1 is characterized in that the cylndrical surface (6-1) of described plunger (6) and internal surface (3-1) the formation sealing pair of last seal ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010535400 CN101994845A (en) | 2010-11-03 | 2010-11-03 | Double seal structure of plunger valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010535400 CN101994845A (en) | 2010-11-03 | 2010-11-03 | Double seal structure of plunger valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101994845A true CN101994845A (en) | 2011-03-30 |
Family
ID=43785387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010535400 Pending CN101994845A (en) | 2010-11-03 | 2010-11-03 | Double seal structure of plunger valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101994845A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806775A (en) * | 2015-03-12 | 2015-07-29 | 杭州艾诺流体控制仪表有限公司 | Hard sealing control valve |
| CN111486244A (en) * | 2020-05-28 | 2020-08-04 | 安徽中烟工业有限责任公司 | Corrugated pipe valve combining plane sealing and conical surface sealing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE372724A (en) * | ||||
| CN2419431Y (en) * | 2000-04-24 | 2001-02-14 | 龚仁荣 | Dual sealed lifting plunger valve |
| CN201954016U (en) * | 2010-11-03 | 2011-08-31 | 无锡杰尔压缩机有限公司 | Dual sealing structure for plunger valve |
-
2010
- 2010-11-03 CN CN 201010535400 patent/CN101994845A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE372724A (en) * | ||||
| CN2419431Y (en) * | 2000-04-24 | 2001-02-14 | 龚仁荣 | Dual sealed lifting plunger valve |
| CN201954016U (en) * | 2010-11-03 | 2011-08-31 | 无锡杰尔压缩机有限公司 | Dual sealing structure for plunger valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806775A (en) * | 2015-03-12 | 2015-07-29 | 杭州艾诺流体控制仪表有限公司 | Hard sealing control valve |
| CN104806775B (en) * | 2015-03-12 | 2017-05-24 | 杭州艾诺流体控制仪表有限公司 | hard sealing control valve |
| CN111486244A (en) * | 2020-05-28 | 2020-08-04 | 安徽中烟工业有限责任公司 | Corrugated pipe valve combining plane sealing and conical surface sealing |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110330 |