CN210739401U - Three-eccentric bidirectional hard seal butterfly valve - Google Patents
Three-eccentric bidirectional hard seal butterfly valve Download PDFInfo
- Publication number
- CN210739401U CN210739401U CN201921133351.4U CN201921133351U CN210739401U CN 210739401 U CN210739401 U CN 210739401U CN 201921133351 U CN201921133351 U CN 201921133351U CN 210739401 U CN210739401 U CN 210739401U
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- butterfly plate
- sealing ring
- valve seat
- valve
- butterfly
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- Expired - Fee Related
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Abstract
The utility model relates to a three-eccentric two-way hard seal butterfly valve, which comprises a valve body, a butterfly plate and a valve rod, wherein the butterfly plate and the valve rod are arranged in the valve body; the outer circumferential wall of the butterfly plate is provided with a butterfly plate sealing ring, the butterfly plate sealing ring is pressed tightly through a pressing ring, and the pressing ring is fixedly connected with the butterfly plate through a fastening screw; a limiting boss is arranged on the inner circumferential wall of the valve body, a floating valve seat is arranged on the limiting boss, the sealing surface of the floating valve seat is an oblique conical surface, and the sealing surface and the oblique conical surface of the butterfly plate sealing ring are matched and sealed with each other to form a sealing pair; the floating valve seat and the butterfly plate sealing ring are made of stainless steel metal materials, and a stainless steel composite layer matched with the floating valve seat is plated on the oblique conical surface of the butterfly plate sealing ring. The utility model has the advantages of reasonable design, still can form good sealed when medium reverse flow between valve body and the butterfly plate, do not receive the restriction of medium pressure direction.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to three eccentric two-way butterfly valves sealed firmly.
Background
The butterfly valve is a regulating valve with simple structure, and can rotate around a valve shaft to open and close. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, and mainly plays a role in cutting off and throttling on a pipeline. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved. The existing hard seal butterfly valve generally adopts a triple eccentric structure design, the whole butterfly plate seal ring and the valve seat are made of metal materials, the seal surface is usually processed into a whole elliptic oblique conical surface, and the butterfly plate seal ring and two metal seal surfaces of the valve seat form a seal pair. However, when the medium pressure increases during the reverse flow, and the unit positive pressure between the valve plate and the valve seat is smaller than the medium pressure, the sealing begins to leak, and the requirement of reverse sealing cannot be met.
Disclosure of Invention
The utility model discloses a solve the technical problem that exists among the well-known technique and provide a three eccentric two-way butterfly valve sealed firmly, this butterfly valve structural design is reasonable, still can form good sealing when the medium reverse flow between valve body and the butterfly plate, does not receive the restriction of medium pressure direction.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be:
a three-eccentric two-way hard seal butterfly valve comprises a valve body, a butterfly plate and a valve rod, wherein the butterfly plate and the valve rod are arranged in the valve body; the outer circumferential wall of the butterfly plate is provided with a butterfly plate sealing ring, the butterfly plate sealing ring is pressed tightly through a pressing ring, and the pressing ring is fixedly connected with the butterfly plate through a fastening screw; a limiting boss is arranged on the inner circumferential wall of the valve body, a floating valve seat is arranged on the limiting boss, the sealing surface of the floating valve seat is an oblique conical surface, and the sealing surface and the oblique conical surface of the butterfly plate sealing ring are matched and sealed with each other to form a sealing pair; the floating valve seat and the butterfly plate sealing ring are made of stainless steel metal materials, and a stainless steel composite layer matched with the floating valve seat is plated on the oblique conical surface of the butterfly plate sealing ring.
The utility model discloses can also adopt following technical measure:
and a first annular groove is formed in the butterfly plate at the joint of the butterfly plate sealing ring and the butterfly plate, and a C-shaped sealing gasket is arranged in the first annular groove.
And a second annular groove is formed in the outer circumferential wall of the floating valve seat, and an O-shaped sealing ring is arranged in the second annular groove.
The limiting boss and the valve body are integrally formed.
The utility model has the advantages and positive effects that:
by adopting the technical scheme, namely the limiting boss is arranged on the inner circle wall of the valve body positioned on one side of the floating valve seat, when a medium flows in the forward direction or after a sealing surface is abraded, the medium pressure pushes the floating valve seat to press the butterfly plate sealing ring, the abrasion of the sealing surface is automatically compensated, and the sealing extrusion is tighter as the pressure is higher; when the medium flows reversely, the floating valve seat can slide along the axial direction of the valve body under the action of the medium pressure to form good sealing fit with the butterfly plate sealing ring, so that good bidirectional sealing performance is achieved, and the sealing structure is not limited by the medium pressure direction; the utility model has the advantages of reasonable design, effectively improved the leakproofness, sealing performance is reliable and stable, has prolonged the life of valve, has wholly improved the security performance of valve.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
In the figure: 1-a valve body; 2-a butterfly plate; 3-a valve stem; 4-butterfly plate sealing ring; 5-pressing a ring; 6-a fastening screw; 7-limiting boss; 8-a floating valve seat; 9-a first annular groove; a 10-C type sealing gasket; 11-ring groove II; 12-O-ring seal.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
referring to fig. 1 and 2, the embodiment provides a triple-eccentric bidirectional hard seal butterfly valve, which includes a valve body 1, and a butterfly plate 2 and a valve rod 3 that are disposed in the valve body 1, wherein the butterfly plate 2 is fixedly connected to the valve rod 3 by a pin; the butterfly plate sealing ring 4 is arranged on the outer circumferential wall of the butterfly plate 2, the butterfly plate sealing ring 4 is compressed through a pressing ring 5, and the pressing ring 5 is connected and fixed with the butterfly plate 2 through a fastening screw 6, so that the pressing ring can better press the butterfly plate sealing ring, and the fastening screw is an inner hexagonal socket head cap screw; a limiting boss 7 is arranged on the inner circumferential wall of the valve body 1, a floating valve seat 8 is arranged on the limiting boss 7, the sealing surface of the floating valve seat 8 is an oblique conical surface, and the sealing surface and the oblique conical surface of the butterfly plate sealing ring 4 are matched and sealed with each other to form a sealing pair; the floating valve seat 8 and the butterfly plate sealing ring 4 are made of stainless steel metal materials, and a stainless steel composite layer matched with the floating valve seat 8 is plated on the oblique conical surface of the butterfly plate sealing ring 4, so that the floating valve seat is not influenced by medium scouring and has a longer service life.
As a further preferred embodiment, a first annular groove 9 is formed in the butterfly plate at the joint of the butterfly plate sealing ring 4 and the butterfly plate 2, and a C-shaped sealing gasket 10 is installed in the first annular groove 9 to ensure the sealing performance between the butterfly plate sealing ring and the butterfly plate.
As a further preferred embodiment, the outer circumferential wall of the floating valve seat 8 is provided with a second annular groove 11, and an O-shaped sealing ring 12 is arranged in the second annular groove 11, so that the floating valve seat and the inner wall of the valve body can still have good sealing performance under the condition of clearance fit.
As a further preferred embodiment, the limiting boss 7 and the valve body 1 are integrally formed, so that the strength of the limiting boss and the valve body is ensured.
The utility model discloses a three eccentric two-way butterfly valve sealed firmly's working process as follows:
when the actuating mechanism of the butterfly valve drives the valve rod 3 to rotate, the valve rod 3 can rotate together with the butterfly plate 2, and when the butterfly plate 2 rotates to a certain angle, the butterfly plate sealing ring 4 on the butterfly plate 2 is separated from the floating valve seat 8, namely the valve is opened; otherwise, the valve is closed.
The utility model arranges the limit boss on the inner circle wall of the valve body at one side of the floating valve seat, when the medium flows in the forward direction or the sealing surface is worn, the medium pressure pushes the floating valve seat to press the butterfly plate sealing ring, the sealing surface is automatically compensated to be worn, the higher the pressure is, the tighter the sealing extrusion is; when the medium flows reversely, the floating valve seat can slide along the axial direction of the valve body under the action of the medium pressure to form good sealing fit with the butterfly plate sealing ring, so that good bidirectional sealing performance is achieved, and the sealing structure is not limited by the medium pressure direction; the utility model has the advantages of reasonable design, effectively improved the leakproofness, sealing performance is reliable and stable, has prolonged the life of valve, has wholly improved the security performance of valve.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any form, and all the changes and modifications equivalent to any simple modification made by the technical entity of the present invention to the above embodiments are within the scope of the technical solution of the present invention.
Claims (2)
1. A three-eccentric two-way hard seal butterfly valve comprises a valve body, a butterfly plate and a valve rod, wherein the butterfly plate and the valve rod are arranged in the valve body; the method is characterized in that: the outer circumferential wall of the butterfly plate is provided with a butterfly plate sealing ring, the butterfly plate sealing ring is pressed tightly through a pressing ring, and the pressing ring is fixedly connected with the butterfly plate through a fastening screw; the inner circle wall of the valve body is provided with a limit boss, the limit boss and the valve body are integrally formed, a floating valve seat is arranged on the limit boss, the sealing surface of the floating valve seat is an oblique conical surface, and the floating valve seat and the oblique conical surface of the butterfly plate sealing ring are matched and sealed with each other to form a sealing pair; the floating valve seat and the butterfly plate sealing ring are both made of stainless steel metal materials, and a stainless steel composite layer matched with the floating valve seat is plated on the oblique conical surface of the butterfly plate sealing ring; and a first annular groove is formed in the butterfly plate at the joint of the butterfly plate sealing ring and the butterfly plate, and a C-shaped sealing gasket is arranged in the first annular groove.
2. The triple offset bi-directional hard seal butterfly valve of claim 1, wherein: and a second annular groove is formed in the outer circumferential wall of the floating valve seat, and an O-shaped sealing ring is arranged in the second annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921133351.4U CN210739401U (en) | 2019-07-17 | 2019-07-17 | Three-eccentric bidirectional hard seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921133351.4U CN210739401U (en) | 2019-07-17 | 2019-07-17 | Three-eccentric bidirectional hard seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210739401U true CN210739401U (en) | 2020-06-12 |
Family
ID=71008238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921133351.4U Expired - Fee Related CN210739401U (en) | 2019-07-17 | 2019-07-17 | Three-eccentric bidirectional hard seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210739401U (en) |
-
2019
- 2019-07-17 CN CN201921133351.4U patent/CN210739401U/en not_active Expired - Fee Related
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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: 20200612 Termination date: 20210717 |