CN101749438A - Hard-seal butterfly valve - Google Patents
Hard-seal butterfly valve Download PDFInfo
- Publication number
- CN101749438A CN101749438A CN200810242769A CN200810242769A CN101749438A CN 101749438 A CN101749438 A CN 101749438A CN 200810242769 A CN200810242769 A CN 200810242769A CN 200810242769 A CN200810242769 A CN 200810242769A CN 101749438 A CN101749438 A CN 101749438A
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- CN
- China
- Prior art keywords
- valve
- butterfly
- valve body
- valve seat
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention provides a hard-seal butterfly valve, which comprises a valve body, a disc, a valve seat, a pressing ring, a pressing plate and a sealing ring. The valve seat is installed on the valve body through the pressing ring. A washer is installed between the pressing ring and the valve body. The sealing ring is installed on the disc through the pressing plate. A butterfly spring is installed between the valve body and the valve seat. The invention has the advantages that, by adopting the butterfly spring, the valve seat can generate certain displacement towards the compression direction and reliable reverse sealing is realized.
Description
Technical field
The present invention relates to a kind of butterfly valve, particularly relate to a kind of hard seal butterfly valve.
Background technique
The hard seal butterfly valve that generally uses on the metallurgy industry gas pipe line generally can only bear positive pressure at present, and the reverse pressure-bearing ability in case system's medium reverse flow then easily causes valve seal not tight, influences environment and personnel's safety.
Summary of the invention
Can only bear positive pressure in order to overcome existing hard seal butterfly valve, the deficiency of reverse pressure-bearing ability the invention provides a kind of hard seal butterfly valve.
The technical solution adopted for the present invention to solve the technical problems is a kind of hard seal butterfly valve, comprise valve body, butterfly plate, valve seat, trim ring, pressing plate, seal ring, valve seat is installed on the valve body by trim ring, between trim ring and the valve body packing ring is housed, seal ring is installed on the butterfly plate by pressing plate, and butterfly spring also is housed between valve body and the valve seat.
The invention has the beneficial effects as follows the employing butterfly spring, valve seat can produce a certain amount of displacement along with the pressurized direction, thereby realizes oppositely sealing reliably.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is embodiment's a tectonic maps;
Among the figure: 1. valve body; 2. trim ring; 3. valve seat; 4. butterfly spring; 5. packing ring; 6. seal ring; 7. pressing plate; 8. butterfly plate.
Embodiment
As shown in Figure 1, a kind of hard seal butterfly valve, comprise valve body 1, butterfly plate 8, valve seat 3, trim ring 2, pressing plate 7, seal ring 6, valve seat 3 is installed on the valve body 1 by trim ring 2, between trim ring 2 and the valve body 1 packing ring 5 is housed, seal ring 6 is installed on the butterfly plate 8 by pressing plate 7, between valve body 1 and the valve seat 3 butterfly spring 4 is housed also.Owing to adopted butterfly spring 4, it is a certain amount of mobile to make valve seat 3 do front and back.When reverse pressurized, medium is used on the valve seat 3 by masterpiece, the end thrust that forms, compression butterfly spring 4, valve seat 3 is moved right, improved the seal pressure between the sealing pair, and along with pressure medium increases, act on that sealing load also strengthens on the sealing pair, guaranteed the reverse sealing of valve effectively.
Claims (1)
1. hard seal butterfly valve, comprise valve body, butterfly plate, valve seat, trim ring, pressing plate, seal ring, valve seat is installed on the valve body by trim ring, between trim ring and the valve body packing ring is housed, seal ring is installed on the butterfly plate by pressing plate, it is characterized in that: butterfly spring also is housed between described valve body and the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810242769A CN101749438A (en) | 2008-12-16 | 2008-12-16 | Hard-seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810242769A CN101749438A (en) | 2008-12-16 | 2008-12-16 | Hard-seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101749438A true CN101749438A (en) | 2010-06-23 |
Family
ID=42476863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810242769A Pending CN101749438A (en) | 2008-12-16 | 2008-12-16 | Hard-seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101749438A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767628A (en) * | 2012-08-03 | 2012-11-07 | 扬州罗克特种阀门有限公司 | Super-low-temperature tri-eccentric butterfly valve |
| CN103994240A (en) * | 2014-05-30 | 2014-08-20 | 安徽铜都流体科技股份有限公司 | Two-way hard sealing butterfly valve with movable valve seat |
-
2008
- 2008-12-16 CN CN200810242769A patent/CN101749438A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767628A (en) * | 2012-08-03 | 2012-11-07 | 扬州罗克特种阀门有限公司 | Super-low-temperature tri-eccentric butterfly valve |
| CN103994240A (en) * | 2014-05-30 | 2014-08-20 | 安徽铜都流体科技股份有限公司 | Two-way hard sealing butterfly valve with movable valve seat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100623 |