CN201310669Y - Anti scour disconnecting valve - Google Patents
Anti scour disconnecting valve Download PDFInfo
- Publication number
- CN201310669Y CN201310669Y CNU2008200898151U CN200820089815U CN201310669Y CN 201310669 Y CN201310669 Y CN 201310669Y CN U2008200898151 U CNU2008200898151 U CN U2008200898151U CN 200820089815 U CN200820089815 U CN 200820089815U CN 201310669 Y CN201310669 Y CN 201310669Y
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- valve
- sealing face
- disconnecting valve
- flap
- sealing surface
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Abstract
The utility model relates to an anti scour disconnecting valve having a double-sealing face structure. An auxiliary sealing face is an annular sealing face, and a primary sealing face is a cone-shaped sealing face. Sealing faces of a valve seat and a valve clack are made of cobalt-based hard metal in a spray welding way. A medium has a structure of coming in from a high place and going out from a low place. The anti scour disconnecting valve solves the problem of internal leakage of a general disconnecting valve used for pollution discharge, and is suitable for drainage systems of heat-engine plants, petrochemical industry and metallurgy industry.
Description
Affiliated technical field
The utility model patent relates to a kind of stop valve.Be applicable to blowdown, the draining system of industries such as electric power, petrochemical industry, metallurgy.
Background technique
At present, the stop valve that industry institute blowdowns such as electric power, petrochemical industry, metallurgy, draining system use, the interior leakage phenomenon that ubiquity is serious, especially even more serious in electric power system.Such stop valve comparison typical structure of announcing has now: Y shape stop valve, band throttle sleeve stop valve etc.But most of structures have only been considered the protection to the flap sealing surface, have ignored that solid particle is to the damage of sealing surface in sealing surface of seat and the medium, and effect is undesirable.
Research by inquiry, the basic reason of leaking in finding is valve opening and turn-off transient.Sealing surface is subjected to washing away of high-velocity fluid, and with cavitation phenomenons, air-flow is being mingled with water droplet, and the high speed impact sealing surface produces erosion, and the very fast inefficacy of valve also produces interior the leakage.In addition, blowdown and draining system are at the boiler startup initial stage, in the unit starting process after particularly new unit or the overhaul, contain a lot of solid particles (iron rust, weldering are assorted, spatter, gas cutting splash, the foreign material in scale and pipeline or the header) in the medium, when valve closing, particle very easily is clipped between the sealing surface, weighs sealing surface wounded or causes valve closing not tight, cause the high speed medium to wash away sealing surface for a long time, cause valves leakage.
Summary of the invention
The purpose of this utility model provides a kind of antiscour stop valve, solves leakage problem in industry blowdown such as electric power, petrochemical industry, metallurgy and the draining system stop valve, has improved valve working life.
The technical solution adopted in the utility model is as follows:
1) the antiscour stop valve by: valve body 1., valve seat 2., flap 3., 4. valve rod wait part to form.
2) the antiscour stop valve adopts double-sealing face structure (as shown in Figure 2), and primary sealing area adopts conical surface seal, and the auxiliary seal face is an annular sealing surface.Wherein, valve seat 2 and flap 3 are formed by two sealing surfaces, form by the cobalt base hard alloy surfacing, guarantee its good scour resistance, wear-resisting property and high-temperature behavior.
The utility model antiscour stop valve adopts high in and low out formula structure:
In the valve closing process, the auxiliary seal face is closed earlier, the decompression throttling, and the blocking-up booty enters the primary sealing area zone, utilize a small amount of medium after the throttling to purge the annular space of primary sealing area again, take away the impurity of coming in before the auxiliary seal face is closed, make sealing surface obtain automatically cleaning, effectively avoided impurity to stay on the sealing surface.Valve closing problem tight or that weigh sealing surface wounded solved, and also avoided the high speed medium to the washing away of primary sealing area simultaneously, thoroughly solved interior leakage problem.
In the valve opening process, after primary sealing area was opened a segment distance, auxiliary seal is secondary just to be opened, and had avoided the high speed medium to the washing away of primary sealing area, and had improved valve working life.
Description of drawings
Fig. 1. be the antiscour stop valve
Fig. 2. be the double-sealing face structure
Fig. 3. for flap is closed the initial stage schematic representation
Fig. 4. be flap throttling schematic representation in period
Fig. 5. be flap closed condition schematic representation
Embodiment
In the embodiment shown in fig. 3, valve is the initial stage of closing, and the auxiliary seal face of valve seat 2 and flap 3 begins to close, and stops solid particle to enter the primary sealing area zone, begins the throttling of reducing pressure simultaneously, thereby makes primary sealing area avoid washing away of high speed medium.
In the embodiment shown in fig. 4, valve is the throttling stage casing, has only a small amount of medium this moment by the small spaces between valve seat 2 and flap 3 auxiliary seal faces, the primary sealing area zone is purged, take away this regional impurity particle, and then cleaned sealing surface, avoid the damage of impurity sealing surface.
In the embodiment shown in fig. 5, valve is a closed condition, has realized the repertoire of antiscour stop valve.
Claims (1)
1. antiscour stop valve, mainly form by valve body (1), valve seat (2), flap (3), valve rod parts such as (4), it is characterized in that, adopt the double seal assistant structure, valve seat (2), flap (3) are formed by two sealing surfaces, primary sealing area adopts conical surface seal, and the auxiliary seal face is for adopting annular sealing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200898151U CN201310669Y (en) | 2008-04-23 | 2008-04-23 | Anti scour disconnecting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200898151U CN201310669Y (en) | 2008-04-23 | 2008-04-23 | Anti scour disconnecting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201310669Y true CN201310669Y (en) | 2009-09-16 |
Family
ID=41107922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200898151U Expired - Lifetime CN201310669Y (en) | 2008-04-23 | 2008-04-23 | Anti scour disconnecting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201310669Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865378A (en) * | 2012-10-10 | 2013-01-09 | 南通龙源电站阀门有限公司 | Anti-scouring stop valve |
| CN102900854A (en) * | 2012-10-26 | 2013-01-30 | 南通龙源电站阀门有限公司 | Dual seal secondary cut-off valve |
| CN103016839A (en) * | 2012-12-08 | 2013-04-03 | 中国航天科技集团公司第六研究院第十一研究所 | Elastic thin-wall valve seat for big-flow high-pressure valve |
| CN107013690A (en) * | 2017-06-09 | 2017-08-04 | 四川省守望信息科技有限责任公司 | Blowoff valve for nuclear power station |
| CN107013692A (en) * | 2017-06-09 | 2017-08-04 | 四川省守望信息科技有限责任公司 | A kind of nuclear island blowoff valve |
| CN107131312A (en) * | 2017-06-09 | 2017-09-05 | 四川行之智汇知识产权运营有限公司 | Blowoff valve for nuclear reactor evaporator |
| CN109442054A (en) * | 2018-11-27 | 2019-03-08 | 浙江双华阀门科技有限公司 | A kind of double-sealed stop valve |
| CN114893600A (en) * | 2022-05-06 | 2022-08-12 | 哈电集团哈尔滨电站阀门有限公司 | Adjustable spring type safety device of totally-enclosed reheater |
-
2008
- 2008-04-23 CN CNU2008200898151U patent/CN201310669Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865378A (en) * | 2012-10-10 | 2013-01-09 | 南通龙源电站阀门有限公司 | Anti-scouring stop valve |
| CN102900854A (en) * | 2012-10-26 | 2013-01-30 | 南通龙源电站阀门有限公司 | Dual seal secondary cut-off valve |
| CN103016839A (en) * | 2012-12-08 | 2013-04-03 | 中国航天科技集团公司第六研究院第十一研究所 | Elastic thin-wall valve seat for big-flow high-pressure valve |
| CN107013690A (en) * | 2017-06-09 | 2017-08-04 | 四川省守望信息科技有限责任公司 | Blowoff valve for nuclear power station |
| CN107013692A (en) * | 2017-06-09 | 2017-08-04 | 四川省守望信息科技有限责任公司 | A kind of nuclear island blowoff valve |
| CN107131312A (en) * | 2017-06-09 | 2017-09-05 | 四川行之智汇知识产权运营有限公司 | Blowoff valve for nuclear reactor evaporator |
| WO2018223588A1 (en) * | 2017-06-09 | 2018-12-13 | 四川行之智汇知识产权运营有限公司 | Discharge valve for nuclear island |
| WO2018223594A1 (en) * | 2017-06-09 | 2018-12-13 | 四川行之智汇知识产权运营有限公司 | Drainage valve for nuclear reactor evaporator |
| CN109442054A (en) * | 2018-11-27 | 2019-03-08 | 浙江双华阀门科技有限公司 | A kind of double-sealed stop valve |
| CN109442054B (en) * | 2018-11-27 | 2024-03-29 | 浙江双华阀门科技有限公司 | Double-seal stop valve |
| CN114893600A (en) * | 2022-05-06 | 2022-08-12 | 哈电集团哈尔滨电站阀门有限公司 | Adjustable spring type safety device of totally-enclosed reheater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090916 |