CN207999532U - A kind of screw bonnet sealing structure with plane elasticity seal groove - Google Patents
A kind of screw bonnet sealing structure with plane elasticity seal groove Download PDFInfo
- Publication number
- CN207999532U CN207999532U CN201820333593.7U CN201820333593U CN207999532U CN 207999532 U CN207999532 U CN 207999532U CN 201820333593 U CN201820333593 U CN 201820333593U CN 207999532 U CN207999532 U CN 207999532U
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- Prior art keywords
- valve
- flap
- valve deck
- groove
- plane
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- 238000007789 sealing Methods 0.000 title claims abstract description 24
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process 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
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- Lift Valve (AREA)
Abstract
The application belongs to valve technology field, and in particular to a kind of screw bonnet sealing structure with plane elasticity seal groove.It includes flap, valve body, valve deck, valve rod, valve deck bottom is plane, and flat seal is formed with valve body respective planes, and a groove for being similar to Ω shapes is arranged at valve deck flat seal, one circular arc fallen in is set again in the reverse side of groove so that form a flexible Ω shaped recesses.The remarkable result of the application is:Due to being designed to that a flexible Ω shaped recesses, the elastic groove can compensate the screw thread relaxation under temperature and pressure variation automatically at valve deck bottom plane sealing so that the road flat seal remains effective under temperature and pressure variation;Pressure medium can increase sealing force, be conducive to the effect for enhancing the road flat seal;Valve deck diameter of bore is more than flap outer circle 0.5-1mm, and valve deck endoporus no longer play the guiding role, and 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 plane elasticity seal groove
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 plane elasticity seal groove
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 the guide surface of flap outer circle, reduce the length of flap cantilever beam, it is inclined to reduce flap
Gradient is conducive to flap sealing performance.
The technical solution of the application is:A kind of screw bonnet sealing structure with plane elasticity seal groove, including flap, valve
Body, valve deck, valve rod, valve deck bottom are plane, form flat seal with valve body respective planes, one is arranged at valve deck flat seal
A circular arc fallen in is arranged in the reverse side of groove in a groove similar to Ω shapes again so that formation one is flexible
Ω shaped recesses.
A kind of screw bonnet sealing structure with plane elasticity seal groove as described above, wherein flap outer circle and valve body
Inner hole is oriented to, and valve deck diameter of bore is more than flap outer circle 0.5-1mm.
The remarkable result of the application is:Due to being designed to that a flexible Ω shape is recessed at valve deck bottom plane sealing
Slot, the elastic groove can compensate the screw thread relaxation under temperature and pressure variation automatically so that the road flat seal is in temperature and pressure
Power variation is lower to remain effective;The characteristics of due to Ω shaped recesses, pressure medium can increase sealing force, be conducive to enhance the road plane
The effect of sealing;Valve deck diameter of bore is more than flap outer circle 0.5-1mm, and valve deck endoporus no longer play the guiding role, by flap outer circle
Guide surface is changed to valve body inner bore, reduces the cantilever beam length of flap guiding, reduces flap deflection, it is close to be conducive to flap
Envelope.
Description of the drawings
Fig. 1 screw bonnet sealing structures in the prior art.
Screw bonnet sealing structures of the Fig. 2 with plane elasticity seal groove.
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 plane elasticity seal groove, wherein design valve deck bottom
At plane, flat seal is formed with valve body respective planes, a groove for being similar to Ω shapes is designed at valve deck flat seal,
A circular arc fallen in is reprocessed in the reverse side of groove so that forms a flexible Ω shaped recesses.Flap outer circle with
Valve body inner bore cooperation is oriented to, and valve deck diameter of bore is more than flap outer circle 0.5-1mm.
Realize that the technical characterstic of the present invention has:Due to being designed to that a flexible Ω shape is recessed at valve deck flat seal
Slot, the elastic groove can compensate the screw thread relaxation under temperature and pressure variation automatically so that the road flat seal is in temperature and pressure
It is still maintained under power variation effective;The characteristics of due to Ω shaped recesses, pressure medium can increase sealing force, be conducive to enhance the road
The effect of flat seal;Since flap outer circle guide surface is changed to valve body inner bore, reduce the cantilever beam length of flap guiding, drop
Low flap deflection is conducive to flap sealing.
Claims (2)
1. a kind of screw bonnet sealing structure with plane elasticity seal groove, including flap, valve body, valve deck, valve rod, feature exist
In:Valve deck bottom is plane, and flat seal is formed with valve body respective planes, and one is arranged at valve deck flat seal and is similar to Ω
A circular arc fallen in is arranged in the reverse side of groove in the groove of shape again so that forms a flexible Ω shaped recesses.
2. a kind of screw bonnet sealing structure with plane elasticity seal groove as described in claim 1, it is characterised in that:Flap
Outer circle is oriented to valve body inner bore cooperation, and valve deck diameter of bore is more than flap outer circle 0.5-1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820333593.7U CN207999532U (en) | 2018-03-12 | 2018-03-12 | A kind of screw bonnet sealing structure with plane elasticity seal groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820333593.7U CN207999532U (en) | 2018-03-12 | 2018-03-12 | A kind of screw bonnet sealing structure with plane elasticity seal groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207999532U true CN207999532U (en) | 2018-10-23 |
Family
ID=63838882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820333593.7U Expired - Fee Related CN207999532U (en) | 2018-03-12 | 2018-03-12 | A kind of screw bonnet sealing structure with plane elasticity seal groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207999532U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260017A (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 plane elasticity seal groove |
-
2018
- 2018-03-12 CN CN201820333593.7U patent/CN207999532U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260017A (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 plane elasticity seal groove |
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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 |