CN206708402U - A kind of two way seal three-eccentric-butterfly-valve - Google Patents
A kind of two way seal three-eccentric-butterfly-valve Download PDFInfo
- Publication number
- CN206708402U CN206708402U CN201720462044.5U CN201720462044U CN206708402U CN 206708402 U CN206708402 U CN 206708402U CN 201720462044 U CN201720462044 U CN 201720462044U CN 206708402 U CN206708402 U CN 206708402U
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- CN
- China
- Prior art keywords
- valve
- valve body
- butterfly
- seals
- butterfly plate
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of two way seal three-eccentric-butterfly-valve, including valve body, butterfly plate and valve shaft, valve shaft is rigidly connected through valve body by bearing pin and butterfly plate, butterfly plate sealing ring is equipped with by pressing plate and screw on the outer circle wall of butterfly plate, it is corresponding equipped with the valve seals being engaged with butterfly plate sealing ring on the inner peripheral wall of the valve body, coordinate between valve seals and the valve body inner peripheral wall for gap, positive stop lug boss formed with circumference on the valve body inner peripheral wall of valve seals side, valve body inner peripheral wall positioned at valve seals opposite side is provided with circumferential spacing back-up ring, the valve seals can between positive stop lug boss and spacing back-up ring sliding axially along valve body.Using the two way seal three-eccentric-butterfly-valve of said structure, when the medium reverse flow in pipeline, valve seals in the presence of medium applies pressure can along the sliding axially of valve body, good sealing formed with the butterfly plate sealing ring coordinate.
Description
Technical field
A kind of butterfly valve is the utility model is related to, concretely relates to a kind of two way seal three-eccentric-butterfly-valve.
Background technology
The structure of metal hard-sealing butterfly valve of the prior art mainly includes valve body, and valve body has butterfly plate peace built with valve shaft
On the valve shaft in valve body, butterfly valve enters by the metal o-ring of the metal o-ring and valve body inner periphery of the installation of butterfly plate excircle
Row is fitted close to realize sealing because being three eccentricity hard sealing structure, the sealing surface of butterfly valve be from butterfly plate sealing ring side to
The inverted cone surface structure of valve seals side, such a structure are flowed to from butterfly plate sealing ring effluent to valve seals side in medium（I.e.
Medium forward flow）When, due to the cone structure characteristic of sealing surface, as pressure medium more big butterfly valve sealing surface cooperation will be tighter
Close, valve seal performance will be better.Above-mentioned valve has good sealing property in medium forward flow, but when medium is reverse
During flowing, because butterfly plate is deformed with valve shaft by pressure medium, and then make to be formed between valve seals and butterfly plate sealing ring
Gap, the sealing property of valve is destroyed, so as to which the reverse sealing of valve can not be realized.
Utility model content
The technical problems to be solved in the utility model is to provide one kind valve seals and butterfly plate when medium reverse flow
Still the two way seal three-eccentric-butterfly-valve of excellent sealing can be formed between sealing ring.
In order to solve the above technical problems, two way seal three-eccentric-butterfly-valve of the present utility model, including valve body, butterfly plate and valve
Axle, valve shaft are rigidly connected through valve body by bearing pin and butterfly plate, and butterfly plate is housed by pressing plate and screw on the outer circle wall of butterfly plate
Sealing ring, it is corresponding close equipped with the valve seals being engaged with butterfly plate sealing ring, the valve body on the inner peripheral wall of the valve body
Coordinate between seal and valve body inner peripheral wall for gap, formed with circumference on the valve body inner peripheral wall of valve seals side
Positive stop lug boss, the valve body inner peripheral wall positioned at valve seals opposite side is provided with circumferential spacing back-up ring, and the valve body is close
Seal can between positive stop lug boss and spacing back-up ring sliding axially along valve body.
As improvement of the present utility model, the excircle of the valve seals is provided with annular groove, and annular groove is built with O
Shape sealing ring.
As further improvement of the utility model, positioning and guiding pin is fixed with the positive stop lug boss uniformly at intervals, should
One section of positioning and guiding pin is extend into described valve seals, and valve seals can be in institute under the guiding of positioning and guiding pin
Sliding axially along valve body between the positive stop lug boss and spacing back-up ring stated.
Using the two way seal three-eccentric-butterfly-valve of said structure, due between the valve seals and valve body inner peripheral wall
Coordinate for gap, the positive stop lug boss formed with circumference on the valve body inner peripheral wall of valve seals side is close positioned at valve body
The valve body inner peripheral wall of seal opposite side is provided with circumferential spacing back-up ring, the valve seals can positive stop lug boss with it is spacing
Sliding axially along valve body between back-up ring, therefore when the medium reverse flow in pipeline, valve seals apply in medium presses
Good sealing can be formed in the presence of power along the sliding axially of valve body, with the butterfly plate sealing ring to coordinate.Using the valve body
The excircle of sealing ring is provided with annular groove, technical characteristic of the annular groove built with O-ring seals, it is ensured that valve seals
Still there is good sealing property in the case of coordinating between valve interior wall in gap；That is installed on the positive stop lug boss determines
Position guide finger can prevent valve seals from rotating the phenomenon for causing dislocation along being produced when sliding axially for valve body, can enter one
Step ensures the excellent sealing between valve seals and butterfly plate sealing ring.
Brief description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is a kind of main cross section structure diagram of two way seal three-eccentric-butterfly-valve of the utility model.
Fig. 2 is the enlarged diagram of structure at I in Fig. 1.
Fig. 3 is the enlarged diagram of structure at II in Fig. 2.
Embodiment
Referring to Fig. 1-Fig. 3, two way seal three-eccentric-butterfly-valve of the present utility model, including valve body 10, butterfly plate 20 and valve shaft
30, valve shaft 30 is rigidly connected through valve body 10 by bearing pin 31 and butterfly plate 20, passes through the He of pressing plate 21 on the outer circle wall of butterfly plate 20
Screw 22 is equipped with butterfly plate sealing ring 23, and the valve being engaged with butterfly plate sealing ring 23 is accordingly housed on the inner peripheral wall of the valve body 10
Body sealing ring 11, coordinate for gap between valve seals 11 and valve body 10 inner peripheral wall, positioned at valve seals 11 1
Positive stop lug boss 12 formed with circumference on the inner peripheral wall of valve body 10 of side, positioned at the inner circle of valve body 10 of the opposite side of valve seals 11
Perisporium is provided with circumferential spacing back-up ring 13, and the valve seals 11 can be between positive stop lug boss 12 and spacing back-up ring 13 along valve
Body 10 slides axially.The excircle of the valve seals 11 is provided with annular groove 14, and annular groove 14 is built with O-ring seals
15.Be fixed with positioning and guiding pin 16 uniformly at intervals on the positive stop lug boss 12, one section of the positioning and guiding pin 16 extend into it is described
Valve seals 11 in, valve seals 11 under the guiding of positioning and guiding pin 16 can described positive stop lug boss 12 with it is spacing
Sliding axially along valve body 10 between back-up ring 13.
Claims (3)
1. a kind of two way seal three-eccentric-butterfly-valve, including valve body（10）, butterfly plate（20）And valve shaft（30）, valve shaft（30）Through valve body
（10）Pass through bearing pin（31）With butterfly plate（20）It is rigidly connected, butterfly plate（20）Outer circle wall on pass through pressing plate（21）And screw（22）
Equipped with butterfly plate sealing ring（23）, the valve body（10）Inner peripheral wall on corresponding be equipped with and butterfly plate sealing ring（23）The valve being engaged
Body sealing ring（11）, it is characterised in that：The valve seals（11）With valve body（10）Coordinate between inner peripheral wall for gap, position
In valve seals（11）The valve body of side（10）Positive stop lug boss formed with circumference on inner peripheral wall（12）, positioned at valve seal
Circle（11）The valve body of opposite side（10）Inner peripheral wall is provided with circumferential spacing back-up ring（13）, the valve seals（11）Can be
Positive stop lug boss（12）With spacing back-up ring（13）Between along valve body（10）Slide axially.
2. two way seal three-eccentric-butterfly-valve as claimed in claim 1, it is characterised in that：The valve seals（11）It is cylindrical
Week is provided with annular groove（14）, annular groove（14）Built with O-ring seals（15）.
3. two way seal three-eccentric-butterfly-valve as claimed in claim 1 or 2, it is characterised in that：The positive stop lug boss（12）Between upper
Every being uniformly fixed with positioning and guiding pin（16）, the positioning and guiding pin（16）One section extend into described valve seals（11）
It is interior, valve seals（11）In positioning and guiding pin（16）Guiding under can be in described positive stop lug boss（12）With spacing back-up ring（13）
Between along valve body（10）Slide axially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720462044.5U CN206708402U (en) | 2017-04-28 | 2017-04-28 | A kind of two way seal three-eccentric-butterfly-valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720462044.5U CN206708402U (en) | 2017-04-28 | 2017-04-28 | A kind of two way seal three-eccentric-butterfly-valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206708402U true CN206708402U (en) | 2017-12-05 |
Family
ID=60457447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720462044.5U Expired - Fee Related CN206708402U (en) | 2017-04-28 | 2017-04-28 | A kind of two way seal three-eccentric-butterfly-valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206708402U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550562A (en) * | 2020-05-20 | 2020-08-18 | 上海禾技实业有限公司 | Eccentric butterfly valve |
-
2017
- 2017-04-28 CN CN201720462044.5U patent/CN206708402U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550562A (en) * | 2020-05-20 | 2020-08-18 | 上海禾技实业有限公司 | Eccentric butterfly valve |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171205 |