CN212804293U - Butterfly valve with three eccentric structures - Google Patents
Butterfly valve with three eccentric structures Download PDFInfo
- Publication number
- CN212804293U CN212804293U CN202021204182.1U CN202021204182U CN212804293U CN 212804293 U CN212804293 U CN 212804293U CN 202021204182 U CN202021204182 U CN 202021204182U CN 212804293 U CN212804293 U CN 212804293U
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- China
- Prior art keywords
- valve
- butterfly plate
- valve body
- butterfly
- sealing washer
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Abstract
The utility model discloses a three eccentric structure butterfly valves, its technical scheme main points are including the valve body, alternate in the valve rod in the valve body, be located the butterfly plate of valve rod one side, set up disk seat, cover on the valve body and locate the butterfly plate outer and with the inconsistent sealing washer of disk seat and with the spacing clamping ring in the valve body of sealing washer, the butterfly plate still overlaps outward and is equipped with the becket that possesses elasticity, the becket is located between butterfly plate and the sealing washer and laminates mutually with the inner wall of sealing washer, has solved prior art's sealing washer because of the problem that the design leads to the leakproofness variation under long-term being pressed down.
Description
Technical Field
The utility model relates to a butterfly valve field, more specifically the utility model relates to a three eccentric structure butterfly valves that says so.
Background
The sealing ring is arranged between the butterfly plate and the valve body for ensuring the sealing performance between the butterfly plate and the valve body, the sealing ring is limited in the valve body by the pressing ring, the commonly used sealing ring is made of PTFE (polytetrafluoroethylene) materials and can resist corrosion, but the sealing ring has no elastic characteristic, the sealing ring is clamped between the pressing ring and the valve body in the horizontal direction for a long time, and is limited between the valve body and the butterfly plate in the vertical direction, so that the sealing ring can generate permanent deformation to influence the sealing performance between the valve body and the butterfly plate.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art existence, the utility model aims to provide a flange formula butterfly valve that leakproofness is lasting.
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a three eccentric structure butterfly valves, includes the valve body, alternates in the valve body valve rod, is located the butterfly plate of valve rod one side, sets up disk seat on the valve body, cover locate the butterfly plate outer and with the inconsistent sealing washer of disk seat and with the spacing clamping ring in the valve body of sealing washer, the butterfly plate still overlaps outward and is equipped with the elastic becket, the becket lies in between butterfly plate and the sealing washer and laminates mutually with the inner wall of sealing washer.
As a further improvement of the utility model, the height of the metal ring is slightly lower than that of the sealing ring.
As a further improvement, the cavity enclosed by the surfaces of the valve seat and the sealing ring, which are attached to each other, is in the shape of a circular truncated cone, and the big end of the circular truncated cone is close to the valve rod.
As a further improvement, the valve seat is provided with a wear-resistant layer on the surface attached with the sealing ring.
The utility model has the advantages that: through set up between butterfly plate and sealing washer and have elastic becket, the internal diameter of becket slightly is greater than the diameter of butterfly plate boss, and the becket produces elasticity because of the compression when making the valve be in to close, and the design that so design compare prior art only has the sealing washer to carry out sealed makes the sealing washer laminate with the disk seat all the time under the effect of elastic becket, keeps the leakproofness between butterfly plate and the disk seat for a long time.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is an enlarged view of a point a in fig. 1.
Reference numerals: 1. a valve body; 2. a valve stem; 3. a butterfly plate; 4. a valve seat; 5. a seal ring; 6. pressing a ring; 7. a metal ring; 8. valve seat wearing layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.
Referring to fig. 1 to 2, a butterfly valve with a triple eccentric structure of this embodiment includes a valve body 1, a valve rod 2 inserted into the valve body 1, a butterfly plate 3 positioned on one side of the valve rod 2, a valve seat 4 disposed on the valve body 1, a seal ring 5 sleeved outside the butterfly plate 3 and abutting against the valve seat 4, and a pressing ring 6 for limiting the seal ring 5 in the valve body 1;
based on the existing foundation, still the cover is equipped with elastic becket 7 outside butterfly plate 3, the height of becket 7 slightly is less than the height of sealing washer 5, becket 7 is located between butterfly plate 3 and sealing washer 5 and laminates with the inner wall of sealing washer 5 mutually, in the installation, becket 7 and sealing washer 5 are overlapped in proper order outside butterfly plate 3, with clamping ring 6 through the mode of bolt fastening fix on butterfly plate 3, clamping ring 6 is contradicted with sealing washer 5 earlier, along with closing of valve sealing washer 5 and the contact of disk seat wearing layer 8, disk seat wearing layer 8 produces pressure and conducts becket 7 to sealing washer 5, make becket 7 compressed and reduce and produce elastic deformation, formed the resilience pretightning force, becket 7 struts sealing washer 5, the outer wall of sealing washer 5 fully laminates with disk seat wearing layer 8 and forms sealedly, so design compare prior art only have the design that sealing washer 5 seals makes sealing washer 5 always with disk seat wearing layer under the effect of elastic becket 7 8, the butterfly plate 3 is jointed with the valve seat 4 to keep the sealing performance between the butterfly plate and the valve seat for a long time.
As an improved specific embodiment, referring to fig. 2, a cavity surrounded by the surfaces of the valve seat wear-resistant layer 8 and the sealing ring 5 is in a circular truncated cone shape, and the large end of the circular truncated cone shape is arranged close to the valve rod 2, when liquid flows to the butterfly plate 3 from the side where the valve rod 2 is connected with the butterfly plate 3, the liquid pressure acts on the butterfly plate 3, the sealing ring 5 and the valve seat 4 are tightly attached, so that the sealing performance is ensured, because a gap exists between the elastic metal ring 7 and the butterfly plate 3, the influence of the deformation of the butterfly plate 3 on a sealing pair is reduced, and the sealing performance of the valve and the service life of the valve are prolonged.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides a three eccentric structure butterfly valves, includes valve body (1), alternates valve rod (2) in valve body (1), be located butterfly plate (3) of valve rod (2) one side, set up disk seat (4) on valve body (1), cover locate butterfly plate (3) outer and with disk seat (4) inconsistent sealing washer (5) and with spacing valve seat lid (6) in valve body (1) of sealing washer (5), its characterized in that: the butterfly plate (3) is also sleeved with an elastic metal ring (7), and the metal ring (7) is positioned between the butterfly plate (3) and the sealing ring (5) and is attached to the inner wall of the sealing ring (5).
2. A triple offset butterfly valve according to claim 1, wherein: the height of the metal ring (7) is slightly lower than that of the sealing ring (5).
3. A butterfly valve with a triple eccentric structure according to claim 1 or 2, characterized in that: the cavity enclosed by the surfaces of the valve seat (4) and the sealing ring (5) is in a circular truncated cone shape, and the large end of the circular truncated cone shape is close to the valve rod (2).
4. A butterfly valve with a triple eccentric structure according to claim 1 or 2, characterized in that: and a valve seat wear-resistant layer (8) is arranged on the surface of the valve seat (4) attached to the sealing ring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021204182.1U CN212804293U (en) | 2020-06-24 | 2020-06-24 | Butterfly valve with three eccentric structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021204182.1U CN212804293U (en) | 2020-06-24 | 2020-06-24 | Butterfly valve with three eccentric structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212804293U true CN212804293U (en) | 2021-03-26 |
Family
ID=75098139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021204182.1U Active CN212804293U (en) | 2020-06-24 | 2020-06-24 | Butterfly valve with three eccentric structures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212804293U (en) |
-
2020
- 2020-06-24 CN CN202021204182.1U patent/CN212804293U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |