CN202790580U - Floating type high-performance butterfly valve - Google Patents
Floating type high-performance butterfly valve Download PDFInfo
- Publication number
- CN202790580U CN202790580U CN 201220452407 CN201220452407U CN202790580U CN 202790580 U CN202790580 U CN 202790580U CN 201220452407 CN201220452407 CN 201220452407 CN 201220452407 U CN201220452407 U CN 201220452407U CN 202790580 U CN202790580 U CN 202790580U
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- Prior art keywords
- valve
- valve seat
- floating type
- type high
- butterfly
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a floating type high-performance butterfly valve. The floating type high-performance butterfly valve comprises a valve body, a valve seat, a valve stem and a butterfly plate, wherein the three, namely the valve stem, the butterfly plate and the valve seat, adopt a triple eccentric structure. The floating type high-performance butterfly valve is mainly characterized in that the valve seat adopts a floating type structure, namely the valve seat is press-mounted on a step of an outlet channel of the valve body by a pressing ring, a spring is arranged between the end surface on the outlet side of the valve seat and the radial end surface of the pressing ring, and the valve seat can axially move between the step of the outlet channel of the valve body and the radial end surface of the pressing ring. When the valve stem generates micro-deformation under the action of reverse medium pressure, the valve seat can press the butterfly plate for sealing under the pressure of a medium and the pushing force of the spring, so that the reverse sealing performance is improved, and the two-way sealing performance is good. The floating type high-performance butterfly valve is suitable for working conditions with two-way media.
Description
Technical field
The utility model relates to valve field, particularly about a kind of butterfly valve.
Background technique
Butterfly valve is widely used in pipe-line system because of simple in structure, open-close convenient, its structure is by valve body, valve seat, valve rod, butterfly plate, in order to improve seal pressure, adopt three eccentric structures between valve rod, butterfly plate and the valve seat three, the butterfly valve of this three eccentric structures has preferably forward sealability, still, in the situation that medium flows backwards, because the micro-strain of valve rod makes obviously decline of sealing between butterfly plate and the valve seat, and valve leakage occurs.
Summary of the invention
The purpose of this utility model is the shortcoming that exists for prior art, and a kind of floating type high-performance butterfly valve of reverse good seal performance is provided.
The technical solution of the utility model comprises valve body, valve seat, valve rod, butterfly plate, adopt three eccentric structures between valve rod, butterfly plate and the valve seat three, mainly be that valve seat adopts floating structure, be that valve seat is fitted on the step of valve outlet passage by trim ring, between the outlet side end face of valve seat and the trim ring radial end face spring is housed, has the gap between valve seat and the trim ring radial end face.
In above technological scheme, the runner internal diameter of the nearly trim ring of valve seat side end face is less than the passage internal diameter of trim ring.
The utility model has the advantages that and adopt floating type valve seat, when reverse media pressure-acting lower valve rod produced micro-strain, valve seat compressed the butterfly plate sealing under pressure medium and spring force promotion, improved reverse sealability, and the two way sealed performance is good.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Floating type high-performance butterfly valve as shown in Figure 1, comprise valve body 1, valve seat 2, valve rod 3, butterfly plate 4, valve rod 3, adopt three eccentric structures between butterfly plate 4 and valve seat 2 threes, valve seat 2 adopts floating structure, be that valve seat 2 is fitted on the step of valve body 1 outlet passage by trim ring 5, between the outlet side end face of valve seat 2 and trim ring 5 radial end faces spring 6 is housed, has the gap between valve seat 2 and trim ring 5 radial end faces, valve seat 2 can be moved axially between valve body 1 outlet passage step and trim ring 5 radial end faces, under the reverse media effect, can compress butterfly plate 4 and keep sealing state, improve reverse sealability.
The runner internal diameter of valve seat 2 close trim ring 5 side end faces makes reverse media produce larger deboost to valve seat 2 less than the passage internal diameter of trim ring 5, better reaches reverse sealing.Butterfly plate 4 sealing surfaces adopt Multi-layer sealing face 7 to form, and this Multi-layer sealing face 7 is fitted on the butterfly plate 4 by pressure ring 8, improves sealing reliability.
Claims (2)
1. floating type high-performance butterfly valve, comprise valve body (1), valve seat (2), valve rod (3), butterfly plate (4), valve rod (3), adopt three eccentric structures between butterfly plate (4) and valve seat (2) three, it is characterized in that valve seat (2) adopts floating structure, be that valve seat (2) is fitted on the step of valve body (1) outlet passage by trim ring (5), between the outlet side end face of valve seat (2) and trim ring (5) radial end face spring (6) is housed, has the gap between valve seat (2) and trim ring (5) radial end face.
2. floating type high-performance butterfly valve according to claim 1 is characterized in that the runner internal diameter of close trim ring (5) side end face of valve seat (2) is less than the passage internal diameter of trim ring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220452407 CN202790580U (en) | 2012-09-04 | 2012-09-04 | Floating type high-performance butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220452407 CN202790580U (en) | 2012-09-04 | 2012-09-04 | Floating type high-performance butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202790580U true CN202790580U (en) | 2013-03-13 |
Family
ID=47817845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220452407 Expired - Fee Related CN202790580U (en) | 2012-09-04 | 2012-09-04 | Floating type high-performance butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202790580U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465385A (en) * | 2016-02-01 | 2016-04-06 | 上海理工大学 | Three-eccentric center butterfly valve used in high temperature and high pressure steam |
-
2012
- 2012-09-04 CN CN 201220452407 patent/CN202790580U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465385A (en) * | 2016-02-01 | 2016-04-06 | 上海理工大学 | Three-eccentric center butterfly valve used in high temperature and high pressure steam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20200904 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |