CN201053507Y - Interference hard seal butterfly valve - Google Patents
Interference hard seal butterfly valve Download PDFInfo
- Publication number
- CN201053507Y CN201053507Y CNU2007200382425U CN200720038242U CN201053507Y CN 201053507 Y CN201053507 Y CN 201053507Y CN U2007200382425 U CNU2007200382425 U CN U2007200382425U CN 200720038242 U CN200720038242 U CN 200720038242U CN 201053507 Y CN201053507 Y CN 201053507Y
- Authority
- CN
- China
- Prior art keywords
- butterfly
- butterfly plate
- plate
- valve rod
- valve
- 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.)
- Expired - Fee Related
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Abstract
The utility model provides an interference hard seal butterfly valve which comprises a valve body, an upper valve rod, a lower valve rod, an upper pressure sleeve and a seal seat. The utility model is characterized in that the inside of the seal seat is provided with an elliptic butterfly plate with a transverse size of a plate surface slightly larger than the inner diameter of the seal seat, the periphery of the butterfly plate is provided with a streamline periphery. When the butterfly valve is closed, besides two force points of the upper valve rod and lower valve rod in the seal seat, the butterfly plate is also provided with two interference points at the left and right of the plate surface as force points, so liquid pressure in a pipe can not cause that the butterfly plate rebounds to leak, and accordingly the sealing property is reliable. Because the butterfly plate of the utility model is provided with the streamline periphery, when the butterfly valve is opened, the fluid has small resistance, the abrasion of the butterfly plate is small, and the service life is long.
Description
Technical field
The utility model is a kind of butterfly valve, especially a kind of interference hard seal butterfly valve, and it is widely used in the control position of relevant pipelines such as chemical industry, pharmacy, power plant, dust removing system.
Background technique
The hard seal butterfly valve of the present extensive use of China, because of reasons in structure, it is subjected to the impact and the pressure of pipeline inner fluid in off position the time, often causes the sealability less stable, causes that butterfly plate can rebound and leaks.
Summary of the invention
Technical problem to be solved in the utility model: be to provide that a kind of simple in structure, sealability is reliable, corrosion resistant, wear-resisting, resistant to elevated temperatures interference hard seal butterfly valve.
For solving the technological scheme that above technical problem adopts is such: the utility model comprises valve body, goes up lower valve rod, goes up gland, sealing seat, it is characterized in that: in the middle of sealing seat, the oval butterfly plate that a plate face transverse dimension is slightly larger than the sealing seat internal diameter is set, and the periphery design of butterfly plate is become streamlined periphery.
Because adopt above technological scheme, its effect is conspicuous:
1, butterfly valve in off position down, butterfly plate in sealing seat except on two forces of lower valve rod, also increased two interference points about the plate face as the force, thus the hydrodynamic pressure in the pipe can not make the butterfly plate bounce-back and leak, so sealability is reliable.
2, because the utility model butterfly plate is provided with streamlined periphery, thus butterfly valve under opening state, the suffered resistance of fluid is little, butterfly plate wearing and tearing are little, long service life.
Description of drawings
Fig. 1 is the utility model sectional structure chart.
Fig. 2 is the plan view of butterfly plate among Fig. 1 (3).
Fig. 3 cuts open figure for the left side office of looking of Fig. 2.
Among the figure: 1, valve body 2, lower valve rod 3, butterfly plate 4, upper valve rod 5, filler 6, Intermediate shaft sleeve 7, last gland 8, sealing gasket 9, sealing seat 10, alloy welding deposit position 11, valve rod jack
Embodiment
With reference to Fig. 1, Fig. 2, Fig. 3, the utility model comprises valve body (1), lower valve rod (2), upper valve rod (4), goes up gland (7), sealing seat (9), it is characterized in that being provided with in the middle of sealing seat (9) the oval butterfly plate (3) that a plate face transverse dimension is slightly larger than sealing seat (9) internal diameter.Behind opened butterfly valve, in order to reduce the resistance of convection cell in the pipeline, the spy is made into fairshaped periphery with oval butterfly plate (3), and it is little to wear and tear like this, has prolonged the working life of butterfly valve.In addition, at butterfly plate periphery alloy welding deposit position (10) build-up wear-resistant alloy, just can prolong butterfly valve working life.
The utility model at work, if close butterfly valve, as long as 90 ° of rotary valve rods, valve rod (2), (4) drive in the sealing seat (9) by valve rod jack (11) immediately and the valve rod jack is the synchronous half-twist of butterfly plate (3) of one, because butterfly plate (3) is oval, so it is in cylinder type sealing seat (9), produce the interior interference fit that expands with the sealing seat inwall, change tight more more, hydrodynamic pressure can not make the butterfly plate bounce-back and produce leakage, so sealability is reliable.
Claims (2)
1. interference hard seal butterfly valve, it comprises valve body (1), lower valve rod (2), upper valve rod (4), goes up gland (7), sealing seat (9), it is characterized in that: be provided with the oval butterfly plate (3) that a plate face transverse dimension is slightly larger than sealing seat (9) internal diameter in the sealing seat (9).
2. interference hard seal butterfly valve according to claim 1 is characterized in that: the periphery of oval butterfly plate (3) is provided with streamlined periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200382425U CN201053507Y (en) | 2007-06-14 | 2007-06-14 | Interference hard seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200382425U CN201053507Y (en) | 2007-06-14 | 2007-06-14 | Interference hard seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201053507Y true CN201053507Y (en) | 2008-04-30 |
Family
ID=39393170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200382425U Expired - Fee Related CN201053507Y (en) | 2007-06-14 | 2007-06-14 | Interference hard seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201053507Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895167A (en) * | 2018-07-06 | 2018-11-27 | 添理仕流体控制（上海）有限公司 | A kind of double eccentric butterfly valve |
-
2007
- 2007-06-14 CN CNU2007200382425U patent/CN201053507Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895167A (en) * | 2018-07-06 | 2018-11-27 | 添理仕流体控制（上海）有限公司 | A kind of double eccentric butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080430 Termination date: 20100614 |