CN202927091U - Anti-scouring valve special for catalysts - Google Patents
Anti-scouring valve special for catalysts Download PDFInfo
- Publication number
- CN202927091U CN202927091U CN 201220435097 CN201220435097U CN202927091U CN 202927091 U CN202927091 U CN 202927091U CN 201220435097 CN201220435097 CN 201220435097 CN 201220435097 U CN201220435097 U CN 201220435097U CN 202927091 U CN202927091 U CN 202927091U
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- valve
- sealed surfaces
- catalysts
- special
- auxiliary
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Abstract
Disclosed is an anti-scouring valve special for catalysts. The anti-scouring valve special for the catalysts comprises a valve body, a valve seat, a valve clack and a valve rod, and is in a double-sealing-pair structure. Both the valve seat and the valve clack are composed of two sealed surfaces. The main sealed surfaces are in inclined surface seal, the auxiliary sealed surfaces are in arc-shaped surface seal, and both the main sealed surfaces and the auxiliary sealed surfaces are covered with polytetrafluoroethylene. The anti-scouring valve special for the catalysts has the advantages that in the process of closing of the valve, the auxiliary sealed surfaces are closed first, pressure reduction and throttling are carried out, dirt is blocked from entering into areas of the main sealed surfaces, arc-shaped spaces of the main sealed surfaces are blown by using of a small amount of media after the throttling, impurities entering before the auxiliary sealed surfaces are closed are taken away, and therefore the sealed surfaces can be self-cleaned, and the impurities can be effectively prevented from staying on the sealed surfaces.
Description
Technical field
The utility model patent relates to a kind of catalyzer special valve.Be applicable to blowdown, the draining system of the industries such as electric power, petrochemical industry, metallurgy.
Background technique
At present, the catalyzer special valve that the blowdown of the industry such as electric power, petrochemical industry, metallurgy institute, draining system use, the interior leakage phenomenon that ubiquity is serious, especially even more serious in electric power system.Such catalyzer special valve comparison typical structure of announcing now has: Y shape catalyzer special valve, band throttle sleeve catalyzer special valve etc.But most of structures have only been considered the protection to valve clack sealing surface, have ignored the damage of solid particle to sealing surface in sealing surface of seat and 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 subject 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 valve lost efficacy very soon and produced interior the leakage.In addition, blowdown and draining system are at the boiler startup initial stage, particularly in the unit starting process after new unit or overhaul, contain a lot of solid particles (iron rust, weldering are assorted, spatter, gas cutting splash, the foreign material in scale and pipeline or header) in medium, when valve closing, particle very easily is clipped between sealing surface, weighs sealing surface wounded or causes valve closing not tight, cause the high speed medium to wash away for a long time sealing surface, cause valves leakage.
Summary of the invention
The purpose of this utility model is to provide a kind of antiscour catalyzer special valve, solves industry blowdown and the interior leakage problems of draining system catalyzer special valve such as electric power, petrochemical industry, metallurgy, has improved valve working life.
To achieve these goals, the technical solution adopted in the utility model is as follows:
A kind of antiscour catalyzer special valve comprises valve body, valve seat, flap, valve rod, adopts the double seal assistant structure, valve seat, flap form by two sealing surfaces, primary sealing area adopts the inclined-plane sealing, and the auxiliary seal face is arc sealing surface, and primary sealing area and auxiliary seal face all cover teflon.
The beneficial effects of the utility model: in the valve closing process, the auxiliary seal face is first closed, the decompression throttling, and the blocking-up booty enters the primary sealing area zone, a small amount of medium after the recycling throttling purges the arc space of primary sealing area, 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 sealing surface.The tight or problem that weigh sealing surface wounded of valve closing 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 is antiscour catalyzer special valve structural drawing.
Embodiment
At the valve closing initial stage, the valve seat 2 of valve body 1 and the auxiliary seal face of flap 3 begin to close, and stop solid particle to enter the primary sealing area zone, begin simultaneously the throttling of reducing pressure, thereby make primary sealing area avoid washing away of high speed medium.Also comprise valve rod 4.
When valve is the throttling stage casing, only have 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 impurity to the damage of sealing surface.
Valve is closed condition, has realized the repertoire of antiscour catalyzer special valve.Teflon has anticatalyst corrosion function.
Claims (1)
1. antiscour catalyzer special valve, comprise valve body (1), valve seat (2), flap (3), valve rod (4), it is characterized in that, adopt the double seal assistant structure, valve seat (2), flap (3) form by two sealing surfaces, primary sealing area adopts the inclined-plane sealing, and the auxiliary seal face is arc sealing surface, and primary sealing area and auxiliary seal face all cover teflon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435097 CN202927091U (en) | 2013-01-26 | 2013-01-26 | Anti-scouring valve special for catalysts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435097 CN202927091U (en) | 2013-01-26 | 2013-01-26 | Anti-scouring valve special for catalysts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202927091U true CN202927091U (en) | 2013-05-08 |
Family
ID=48217051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220435097 Expired - Fee Related CN202927091U (en) | 2013-01-26 | 2013-01-26 | Anti-scouring valve special for catalysts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202927091U (en) |
-
2013
- 2013-01-26 CN CN 201220435097 patent/CN202927091U/en not_active Expired - Fee Related
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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: 20130508 Termination date: 20150126 |
|
| EXPY | Termination of patent right or utility model |