CN207999506U - A kind of screw bonnet sealing structure with conical surface elastic packing lip - Google Patents
A kind of screw bonnet sealing structure with conical surface elastic packing lip Download PDFInfo
- Publication number
- CN207999506U CN207999506U CN201820333577.8U CN201820333577U CN207999506U CN 207999506 U CN207999506 U CN 207999506U CN 201820333577 U CN201820333577 U CN 201820333577U CN 207999506 U CN207999506 U CN 207999506U
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- CN
- China
- Prior art keywords
- conical surface
- flap
- valve
- lip
- surface seal
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- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 title claims abstract description 20
- 238000012856 packing Methods 0.000 title claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The application belongs to valve technology field, and in particular to a kind of screw bonnet sealing structure with conical surface elastic packing lip.A kind of screw bonnet sealing structure with conical surface elastic packing lip, including flap, valve body, valve deck, valve rod, bonnet lower is the conical surface, with formation conical surface seal at valve body shoulder, the elastic lip of one groove shapes is set at valve deck conical surface seal, forms a flexible conical surface seal lip.The remarkable result of the application is:Due to being designed to that a flexible groove conical surface seal lip, the elastic lip can compensate the screw thread relaxation under temperature and pressure variation automatically at valve deck conical surface seal so that the road conical surface seal can still remain effective under temperature and pressure variation;Since valve deck endoporus no longer play the guiding role, flap outer circle guide surface is changed to valve body inner bore, reduces the cantilever beam length of flap guiding, reduces flap deflection, is conducive to flap sealing.
Description
Technical field
The application belongs to valve technology field, and in particular to a kind of screwed bonnet sealing knot with conical surface elastic packing lip
Structure.
Background technology
Smaller diameter valve is passed through frequently with screw bonnet sealing structure, and common screw bonnet sealing structure is as shown in Figure 1, valve
Lid is by being threaded into valve body, and it is close to form first of conical surface in bonnet lower there are one the conical surface, after the conical surface and valve body contact
Envelope is sealed weldering at valve body middle chamber outer surface and valve deck mating surface and forms second sealing, flap outer circle and valve deck endoporus
It matches to form guide frame, valve rod drives flap to move up and down by T connector.
The structure has the disadvantage that:
1, flap outer circle is oriented on flap top with the valve deck endoporus place of matching, and the position of guiding is on the upper side, works as valve
Apparent cantilever beam will be formed when tilting or lie down installation, when flap is in open state, under medium effect, flap deflection
It measures bigger, is unfavorable for valve seal.
2, in temperature, pressure change, screw thread can usually relax so that the conical surface seal between bonnet lower and valve body loses
It imitates, at such valve body middle chamber outer circle and the sealing welding of valve deck will directly bear pressure medium so that there are stress increases for the weld seam
And the risk to fail.
Invention content
The purpose of the application is in view of the drawbacks of the prior art, it is close to provide a kind of screwed bonnet with conical surface elastic packing lip
Seal structure, the structure can compensate the screw thread caused by temperature and pressure variation and relax automatically, it is ensured that valve bonnet seal performance;
And be modified to be oriented to by valve body inner bore by flap outer circle, reduce the length of flap cantilever beam, reduces flap deflection, favorably
In flap sealing performance.
The technical solution of the application is:A kind of screw bonnet sealing structure with conical surface elastic packing lip, including flap, valve
Body, valve deck, valve rod, bonnet lower are the conical surface, and with formation conical surface seal at valve body shoulder, one is arranged at valve deck conical surface seal
The elastic lip of groove shapes forms a flexible conical surface seal lip.
A kind of screw bonnet sealing structure with conical surface elastic packing lip as described above, wherein flap outer circle and valve body
Inner hole is oriented to, and gap B is designed between valve deck endoporus and flap top outer circle, and valve deck diameter of bore is more than corresponding position
Flap outer circle 1mm-2mm, valve deck bottom and the gap A of flap outer circle shoulder are more than flap Lift.
The remarkable result of the application is:Due to being designed to a flexible groove conical surface seal at valve deck conical surface seal
Lip, the elastic lip can compensate the screw thread relaxation under temperature and pressure variation automatically so that the road conical surface seal is in temperature and pressure
It can still remain effective under power variation;Since valve deck endoporus no longer play the guiding role, flap outer circle guide surface is changed to valve body inner bore,
The cantilever beam length for reducing flap guiding, reduces flap deflection, is conducive to flap sealing.
Description of the drawings
Fig. 1 screw bonnet sealing structures in the prior art.
Screw bonnet sealing structures of the Fig. 2 with conical surface elastic packing lip.
In figure:1 flap;2 valve bodies;3 valve decks;4 valve rods.
Specific implementation mode
The application is described further below in conjunction with the accompanying drawings:
As shown in Fig. 2, a kind of screw bonnet sealing structure with conical surface elastic packing lip, wherein bonnet lower is cone
Conical surface seal is formed at face, with valve body shoulder, the elastic lip of a groove shapes is designed at valve deck conical surface seal so that is formed
One flexible conical surface seal lip.Flap outer circle is oriented to valve body inner bore cooperation, between valve deck endoporus and flap top outer circle
It is designed with gap B, valve deck diameter of bore is more than the flap outer circle 1mm-2mm of corresponding position, valve deck bottom and flap outer circle shoulder
Gap A be more than flap Lift.
Realize that the technical characterstic of the present invention has:Due to being designed to that a flexible groove conical surface is close at valve deck conical surface seal
Seal lip, which can compensate the screw thread relaxation under temperature and pressure variation automatically so that the road conical surface seal in temperature and
It can still be maintained under pressure change effective;Since valve deck endoporus no longer play the guiding role, flap outer circle guide surface is changed in valve body
Hole reduces the cantilever beam length of flap guiding, reduces flap deflection, is conducive to flap sealing.
Claims (2)
1. a kind of screw bonnet sealing structure with conical surface elastic packing lip, including flap, valve body, valve deck, valve rod, feature exist
In:Bonnet lower is the conical surface, with formation conical surface seal at valve body shoulder, one groove shapes of setting at valve deck conical surface seal
Elastic lip forms a flexible conical surface seal lip.
2. a kind of screw bonnet sealing structure with conical surface elastic packing lip as described in claim 1, it is characterised in that:Flap
Outer circle is oriented to valve body inner bore cooperation, gap B is designed between valve deck endoporus and flap top outer circle, valve deck diameter of bore is more than
The flap outer circle 1mm-2mm of corresponding position, valve deck bottom and the gap A of flap outer circle shoulder are more than flap Lift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820333577.8U CN207999506U (en) | 2018-03-12 | 2018-03-12 | A kind of screw bonnet sealing structure with conical surface elastic packing lip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820333577.8U CN207999506U (en) | 2018-03-12 | 2018-03-12 | A kind of screw bonnet sealing structure with conical surface elastic packing lip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207999506U true CN207999506U (en) | 2018-10-23 |
Family
ID=63839594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820333577.8U Expired - Fee Related CN207999506U (en) | 2018-03-12 | 2018-03-12 | A kind of screw bonnet sealing structure with conical surface elastic packing lip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207999506U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259953A (en) * | 2018-03-12 | 2019-09-20 | 中核苏阀科技实业股份有限公司 | A kind of screw bonnet sealing structure with conical surface elastic packing lip |
-
2018
- 2018-03-12 CN CN201820333577.8U patent/CN207999506U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259953A (en) * | 2018-03-12 | 2019-09-20 | 中核苏阀科技实业股份有限公司 | A kind of screw bonnet sealing structure with conical surface elastic packing lip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181023 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |