CN210218705U - Pressure automatic sealing butterfly valve - Google Patents
Pressure automatic sealing butterfly valve Download PDFInfo
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- CN210218705U CN210218705U CN201921014507.7U CN201921014507U CN210218705U CN 210218705 U CN210218705 U CN 210218705U CN 201921014507 U CN201921014507 U CN 201921014507U CN 210218705 U CN210218705 U CN 210218705U
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- valve body
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- butterfly plate
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Abstract
The utility model discloses a pressure self sealing butterfly valve has the valve body and is located the butterfly plate in the valve body, is equipped with the valve shaft on the valve body, and the butterfly plate passes through the valve shaft to be adorned in the valve body, and the outer circumference of butterfly plate is formed with curved butterfly plate sealing face, is formed with the disk seat on the interior circumference of valve body, be equipped with on the disk seat with the sealed face matched with valve body sealing washer of butterfly plate, valve body sealing washer have the sealed face of toper, the valve body sealing washer with its sealed face with the sealed face of curved butterfly plate cooperatees and forms sealed vice, be formed with the lug of circumference on the outer circumference of valve body sealing washer, correspondingly be formed with the recess of circumference in the disk seat, the lug of circumference is located the recess of circumference and can. Use the utility model discloses afterwards, even the medium pressure need not increase the good sealing that the moment of torsion was opened and close of valve can be realized to the moment of torsion when lower yet.
Description
Technical Field
The utility model relates to a butterfly valve, specifically speaking relate to a pressure self sealing butterfly valve.
Background
The butterfly valve is widely used in metallurgy, electric power, petroleum, chemical engineering, municipal heat supply and other projects. The butterfly plate of butterfly valve passes through the valve shaft and installs in the valve body, and the valve body sealing washer has the sealed face of toper, and the sealed face of butterfly plate is the sealed face of arc, and the valve body sealing washer cooperatees with the sealed face of curved butterfly plate with its toper sealed face and forms sealed pair, and sealed pair relies on the pressure between two sealed faces to guarantee that the medium can not the seepage. In the existing butterfly valve, the sealing surfaces of the valve body sealing ring and the butterfly plate are respectively fixed on the valve body and the butterfly plate, the pressure between the sealing surfaces is constant after assembly, and cannot be changed due to the change of medium pressure, so that the sealing force between the sealing surfaces has large allowance when the medium pressure is low, and the torque ratio is large when the valve is opened and closed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a pressure self sealing butterfly valve, use the utility model discloses even the medium pressure need not increase the moment of torsion of opening and close of valve when lower after yet.
For solving the technical problem, the utility model discloses a pressure self sealing butterfly valve has the valve body and is located the butterfly plate in the valve body, is equipped with the valve shaft on the valve body, and the butterfly plate passes through the valve shaft to be adorned in the valve body, and the outer circumference of butterfly plate is formed with curved butterfly plate sealing face, is formed with the disk seat on the interior circumference of valve body, be equipped with on the disk seat with the sealed face matched with valve body sealing washer of butterfly plate, valve body sealing washer have the sealed face of toper, the valve body sealing washer with its sealed face with the sealed face of curved butterfly plate cooperatees and forms sealed vice, be formed with the lug of circumference on the outer circumference of valve body sealing washer, correspondingly be formed with the recess of circumference in the disk seat, the lug of circumference is located the recess of.
As the improvement of the utility model, be equipped with annular limit stop through the bolt on the circumference that is formed with limit boss, opposite side on the circumference of disk seat one side, form between limit boss and the limit stop circumference recess.
As a further improvement, the rubber sealing ring is respectively arranged on the inner and outer circumferences of the limit stop and is in sealing fit with the outer wall of the valve body sealing ring and the inner wall of the valve body.
The pressure automatic sealing butterfly valve adopting the structure has the advantages that the circumferential convex block is formed on the outer circumference of the valve body sealing ring, the circumferential groove is correspondingly formed in the valve seat, and the circumferential convex block is located in the circumferential groove and can slide in the circumferential groove along the valve body axis, so that when the valve is closed, pressure generated by a medium can push the valve body sealing ring to move towards the sealing surface of the butterfly plate along the valve body axis, good matching of the conical sealing surface of the valve body sealing ring and the arc-shaped sealing surface of the butterfly plate is realized, good sealing effect is achieved, and good sealing can be realized without increasing the opening and closing torque of the valve. Rubber sealing rings are respectively arranged on the inner circumference and the outer circumference of the limit stop, so that the medium can be prevented from leaking from the limit stop.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic main sectional structural view of the automatic pressure sealing butterfly valve of the present invention.
Fig. 2 is an enlarged schematic view of the structure at I in fig. 1.
Fig. 3 is the view of fig. 2 with the valve body seal removed.
Fig. 4 is an enlarged schematic view of the valve body seal ring of fig. 2.
Detailed Description
Referring to fig. 1-4, the utility model discloses a pressure self sealing butterfly valve has valve body 1 and is located the butterfly plate 2 of valve body, is equipped with valve shaft 3 on the valve body, and the butterfly plate passes through valve shaft 3 and adorns in the valve body, and the outer circumference of butterfly plate is formed with curved butterfly plate sealing surface 4, is formed with disk seat 5 on the interior circumference of valve body, be equipped with on the disk seat with the sealed face 4 matched with valve body sealing ring 6 of butterfly plate, valve body sealing ring 6 have the sealed face 7 of toper, the valve body sealing ring with its sealed face 7 of toper with the sealed face 4 of curved butterfly plate cooperatees and forms sealed vice, be formed with circumference's lug 8 on the outer circumference of valve body sealing ring 6, correspondingly be formed with circumference's recess 9 in the disk seat 5, circumference's lug 8 is located circumference's recess 9 and can follow. A limiting boss 10 is formed on the circumference of one side of the valve seat 5, an annular limiting stop 12 is arranged on the circumference of the other side of the valve seat through a bolt 11, and the circumferential groove 9 is formed between the limiting boss 10 and the limiting stop 12. And rubber sealing rings 13 which are in sealing fit with the outer wall of the valve body sealing ring 6 and the inner wall of the valve body 1 are respectively arranged on the inner circumference and the outer circumference of the limit stop 12.
Claims (3)
1. The utility model provides a pressure self sealing butterfly valve, has valve body (1) and is located butterfly plate (2) in the valve body, is equipped with valve shaft (3) on the valve body, and the butterfly plate passes through valve shaft (3) and adorns in the valve body, and the outer circumference of butterfly plate is formed with curved butterfly plate sealing face (4), is formed with disk seat (5) on the interior circumference of valve body, be equipped with on the disk seat with the sealed face of butterfly plate (4) matched with valve body sealing washer (6), valve body sealing washer (6) have the sealed face of toper (7), the valve body sealing washer with its sealed face of toper (7) with the sealed face of curved butterfly plate (4) cooperatees and forms sealed vice: a circumferential lug (8) is formed on the outer circumference of the valve body sealing ring (6), a circumferential groove (9) is correspondingly formed in the valve seat (5), and the circumferential lug (8) is located in the circumferential groove (9) and can slide in the circumferential groove (9) along the valve body axis.
2. The pressure self-sealing butterfly valve of claim 1, wherein: a limiting boss (10) is formed on the circumference of one side of the valve seat (5), an annular limiting stop block (12) is arranged on the circumference of the other side of the valve seat through a bolt (11), and a circumferential groove (9) is formed between the limiting boss (10) and the limiting stop block (12).
3. The pressure self-sealing butterfly valve of claim 2, wherein: and rubber sealing rings (13) which are in sealing fit with the outer wall of the valve body sealing ring (6) and the inner wall of the valve body (1) are respectively arranged on the inner circumference and the outer circumference of the limit stop (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921014507.7U CN210218705U (en) | 2019-07-02 | 2019-07-02 | Pressure automatic sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921014507.7U CN210218705U (en) | 2019-07-02 | 2019-07-02 | Pressure automatic sealing butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210218705U true CN210218705U (en) | 2020-03-31 |
Family
ID=69935351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921014507.7U Active CN210218705U (en) | 2019-07-02 | 2019-07-02 | Pressure automatic sealing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210218705U (en) |
-
2019
- 2019-07-02 CN CN201921014507.7U patent/CN210218705U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |