CN101713468A - Butterfly valve with single valve seat and multi-sealing structure - Google Patents
Butterfly valve with single valve seat and multi-sealing structure Download PDFInfo
- Publication number
- CN101713468A CN101713468A CN200910234731A CN200910234731A CN101713468A CN 101713468 A CN101713468 A CN 101713468A CN 200910234731 A CN200910234731 A CN 200910234731A CN 200910234731 A CN200910234731 A CN 200910234731A CN 101713468 A CN101713468 A CN 101713468A
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- valve seat
- butterfly
- sealing
- ring
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Abstract
The invention discloses a butterfly valve with a single valve seat and a multi-sealing structure, which comprises a valve body, a valve seat which is fixedly arranged in an inner cavity of the valve body, a valve shaft, and a butterfly plate which is fixedly arranged on the valve shaft. The butterfly plate is provided with a first sealing ring; an isolation ring is arranged at the outer side of the first sealing ring; a third sealing ring is arranged at the outer side of the isolation ring; a pressing plate is arranged at the outer side of the third sealing ring; the pressing plate is fixedly arranged on the butterfly plate through a bolt to fixedly arrange the third sealing ring, the isolation ring, and the first sealing ring on the butterfly plate. When the butterfly valve with the single valve seat and the multi-sealing structure is completely closed, a cavity is formed by the first sealing ring, the isolation ring, the third sealing ring and the valve seat; water injection holes are arranged on the valve body and the valve seat and are communicated with the cavity; and the cavity is injected with sealed water to form water sealing. The invention has the advantages of simple structure, convenient operation, low cost, no leakage of gas medium, small occupation space, reliable sealing, and sealing characteristic of zero leakage.
Description
Technical field
The present invention relates to a kind of butterfly valve, refer more particularly to a kind of butterfly valve with single valve seat and multi-sealing structure.
Background technique
Butterfly valve generally is used in the gas distribution pipe network and reclaim line of steel industry, is used for blocking and regulating of pipeline coal gas.The equipment of gas distribution pipe network needs periodical repair, in maintenance, has required the butterfly valve of the effect of blocking must have " zero " seepage sealing characteristics, plays the blank-plate valve gate action, leaks to avoid coal gas, because coal gas has inflammable, explosive and poisonous character; Therefore, consider that from safety, environmental protection and energy-conservation angle the butterfly valve of use must have " zero " seepage sealing characteristics.All there is shortcoming in the valve of doing the blind plate effect of gas pipe line outfit now, can not satisfy usage requirement.As: Flap valve takes up room bigger, and complex structure has a large amount of coal gas and overflows in the operation; The push-pull valve volume is big, and cost is higher; Water Seal Gate Valves takes up room bigger, instability; Two butterfly valve watertight construction volumes are big, and cost is higher, and action match and regulate difficulty is big.
Summary of the invention
Technical problem to be solved by this invention is: the butterfly valve with single valve seat and multi-sealing structure that provides a kind of and have " zero " seepage sealing characteristics.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: butterfly valve with single valve seat and multi-sealing structure, comprise: valve body, be fixedly installed on the valve seat of body cavity, valve shaft, be fixedly installed on the butterfly plate on the valve shaft, described butterfly plate is provided with first seal ring, in the first seal ring arranged outside isolating ring is arranged, in the isolating ring arranged outside the 3rd seal ring is arranged, in the 3rd seal ring arranged outside pressing plate is arranged, thereby pressing plate is fixedly installed on the butterfly plate the 3rd seal ring by set screw, the isolating ring and first seal ring are fixedly installed on the butterfly plate, when the butterfly valve with single valve seat and multi-sealing structure contract fully, at first seal ring, isolating ring, can form cavity between the 3rd seal ring and the valve seat, valve body and valve seat are provided with the water injection hole that is connected with cavity, inject sealing water in the cavity, form water-stop.
Advantage of the present invention is: the butterfly valve with single valve seat and multi-sealing structure of said structure, and simple in structure, easy to operate, cost is low, and gas medium does not leak, and it is little to take up room, and sealing is reliable, has " zero " seepage sealing characteristics.
Description of drawings
Fig. 1 is the sectional structure schematic representation of butterfly valve with single valve seat and multi-sealing structure of the present invention.
Fig. 2 is an A part enlarged view among Fig. 1.
Among the figure: 1, valve body, 2, valve seat, 3, valve shaft, 4, butterfly plate, 5, first seal ring, 6, isolating ring, the 7, the 3rd seal ring, 8, pressing plate, 9, set screw, 10, cavity, 11, water injection hole.
Embodiment
Describe particular content of the present invention in detail below in conjunction with the drawings and specific embodiments.
As Fig. 1, shown in Figure 2, butterfly valve with single valve seat and multi-sealing structure, comprise: valve body 1, be fixedly installed on the valve seat 2 of valve body 1 inner chamber, valve shaft 3, be fixedly installed on the butterfly plate 4 on the valve shaft 3, described butterfly plate 4 is provided with first seal ring 5, in first seal ring, 5 arranged outside isolating ring 6 is arranged, in isolating ring 6 arranged outside the 3rd seal ring 7 is arranged, in the 3rd seal ring 7 arranged outside pressing plate 8 is arranged, thereby pressing plate 8 is fixedly installed on the butterfly plate 4 the 3rd seal ring 7 by set screw 9, the isolating ring 6 and first seal ring 5 are fixedly installed on the butterfly plate 4, when the butterfly valve with single valve seat and multi-sealing structure contract fully, at first seal ring 5, isolating ring 6, can form cavity 10 between the 3rd seal ring 7 and the valve seat 2, valve body 1 and valve seat 2 are provided with the water injection hole 11 that is connected with cavity 10, inject sealing water in the cavity 10, form water-stop.
When the butterfly valve with single valve seat and multi-sealing structure of said structure uses, when needs are closed butterfly valve, rotate valve shaft 3, valve shaft 3 drives butterfly plate 4 and rotates, butterfly plate 4 and valve seat 2 are cooperatively interacted, make butterfly valve be in full closing state, first seal ring 5 and the 3rd seal ring 7 coincide with valve seat 2 simultaneously and form sealing, at first seal ring 5, isolating ring 6, can form cavity 10 between the 3rd seal ring 7 and the valve seat 2, inject water by water injection hole 11 in cavity 10, the gauge pressure of water is higher than the coal gas pressure medium, will form water-stop one, because the pressure of water is higher than the pressure of coal gas, coal gas can't overflow by water-stop, had realized " zero " seepage of valve.
Claims (1)
1. butterfly valve with single valve seat and multi-sealing structure, comprise: valve body (1), be fixedly installed on the valve seat (2) of valve body (1) inner chamber, valve shaft (3), be fixedly installed on the butterfly plate (4) on the valve shaft (3), it is characterized in that: described butterfly plate (4) is provided with first seal ring (5), in first seal ring (5) arranged outside isolating ring (6) is arranged, in isolating ring (6) arranged outside the 3rd seal ring (7) is arranged, in the 3rd seal ring (7) arranged outside pressing plate (8) is arranged, pressing plate (8) is fixedly installed on butterfly plate (4) by set screw (9) thereby goes up the 3rd seal ring (7), isolating ring (6) and first seal ring (5) are fixedly installed on the butterfly plate (4), when the butterfly valve with single valve seat and multi-sealing structure contract fully, in first seal ring (5), isolating ring (6), can form cavity (10) between the 3rd seal ring (7) and the valve seat (2), valve body (1) and valve seat (2) are provided with the water injection hole (11) that is connected with cavity (10), inject sealing water in the cavity (10), form water-stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910234731A CN101713468A (en) | 2009-11-17 | 2009-11-17 | Butterfly valve with single valve seat and multi-sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910234731A CN101713468A (en) | 2009-11-17 | 2009-11-17 | Butterfly valve with single valve seat and multi-sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101713468A true CN101713468A (en) | 2010-05-26 |
Family
ID=42417358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910234731A Pending CN101713468A (en) | 2009-11-17 | 2009-11-17 | Butterfly valve with single valve seat and multi-sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101713468A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759024A (en) * | 2014-01-08 | 2014-04-30 | 铁岭特种阀门股份有限公司 | Two-way sealing butterfly valve with hydraulic-floating valve seat and sediment prevention function |
| CN115875462A (en) * | 2023-01-04 | 2023-03-31 | 盐城宝泽电力石化机械制造有限公司 | Baffle door with sealing device |
-
2009
- 2009-11-17 CN CN200910234731A patent/CN101713468A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759024A (en) * | 2014-01-08 | 2014-04-30 | 铁岭特种阀门股份有限公司 | Two-way sealing butterfly valve with hydraulic-floating valve seat and sediment prevention function |
| CN103759024B (en) * | 2014-01-08 | 2016-04-20 | 铁岭特种阀门股份有限公司 | There is the bidirectional sealed butterfly valve of the floating type valve seat of fluid power and anti-silt function |
| CN115875462A (en) * | 2023-01-04 | 2023-03-31 | 盐城宝泽电力石化机械制造有限公司 | Baffle door with sealing device |
| CN115875462B (en) * | 2023-01-04 | 2023-10-10 | 盐城宝泽电力石化机械制造有限公司 | Baffle door with sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100526 |