CN202252179U - Stop check valve for high-pressure bellows - Google Patents
Stop check valve for high-pressure bellows Download PDFInfo
- Publication number
- CN202252179U CN202252179U CN2011203906293U CN201120390629U CN202252179U CN 202252179 U CN202252179 U CN 202252179U CN 2011203906293 U CN2011203906293 U CN 2011203906293U CN 201120390629 U CN201120390629 U CN 201120390629U CN 202252179 U CN202252179 U CN 202252179U
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- China
- Prior art keywords
- valve
- bellows
- valve body
- stop check
- groove
- 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 relates to a stop check valve for a high-pressure bellows, belonging to the valve manufacturing technology. The stop check valve for the high-pressure bellows comprises a valve body, a valve clack, a valve rod, a hand wheel and a bellows, wherein a spring is arranged between the valve rod and the valve clack; the upper end of the bellows is welded with an upper bellows seat, and the lower end of the bellows is welded on the valve clack; a valve cap is arranged above the valve body, and a groove and a bulge which are mutually matched are fixedly arranged between the valve cap and the valve body respectively, and a composite gasket is arranged between the groove and the bulge; a sealing ring is arranged between the valve body and the upper bellows seat, and an annular convex block is arranged on the valve cap; the annular convex block is arranged between the valve body and the upper bellows seat and above the sealing ring; and the valve cap is connected with the valve body through a bolt. The stop check valve for the high-pressure bellows has simple structure, tight sealing, long service life, simple replacement and high compressive strength and can enable media in a pipeline and a valve chamber not to leak outwards from a middle flange in any case.
Description
Technical field
The utility model relates to the valve manufacturing technology, particularly a kind of high pressure bellows screw down nonreturn valve.
Background technique
The high pressure Bellows valve mainly is used in some to have toxicity or atmosphere is had on the medium pipeline of pollution, therefore, sealability is required high especially, does not allow any phenomenon that leaks outside.There are 2 positions that mainly contain of the hidden danger that leaks outside in valve: 1) stem packing place, and at present, existing general Bellows valve filler position can guarantee zero leakage by sylphon seal; 2) flange place in, mainly by Composition spacer sealing and two kinds of structures of welded bonnet, wherein Composition spacer the phenomenon that leaks outside can occur to common structure under high-pressure situations, especially heavy caliber high pressure Bellows valve; Though the welded bonnet structure can avoid the phenomenon that leaks outside, maintenance is inconvenient, is not easy dismounting, can not use for a long time.
Summary of the invention
The utility model purpose is to above defective a kind of high pressure bellows screw down nonreturn valve to be provided.
The utility model comprises valve body, flap, and valve rod, handwheel and bellows are provided with spring between said valve rod and flap; Corrugated header in the welding of the upper end of said bellows, the lower end of said bellows is welded on the flap; Above said valve body, valve gap is set, fixedly installs the groove and convexity that cooperatively interact between said valve gap and the valve body respectively, between said groove and convexity, Composition spacer is set; Between said valve body and last corrugated header, seal ring is set, on said valve gap, annular lug is set, said annular lug cooperation is arranged between valve body and the last corrugated header, in the top of seal ring; Said valve gap is connected with valve body through bolt.
The utility model compresses seal ring through the annular lug of valve gap, and bolt compresses the Composition spacer between valve gap groove and valve body convexity, the realization double sealing structure.Bellows place compressive state during the utility model work; Promote flap respectively and press to sealing surface, last corrugated header is pressed to seal ring, when high-pressure medium overcomes the power of bellows and spring; Flap is opened; High-pressure medium gets into inner chamber, and corrugated header is pressed to seal ring on promoting, and high sealing performance is good more more with pipeline pressure.The utility model is simple in structure, sealing is tight, long service life, replacing is simple, compressive strength is high, is a kind ofly can make that medium in no instance can be by the high pressure bellows screw down nonreturn valve of middle flange to external leakage in pipeline and the valve pocket.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the A portion enlarged view of Fig. 1.
Embodiment
Like Fig. 1, shown in 2, the utility model is provided with valve body 1, flap 2, and valve rod 4, handwheel 5 and bellows 6 are provided with spring 7 between valve rod 1 and flap 2; Corrugated header 8 in the welding of the upper end of bellows 6, the lower end of bellows 6 is welded on the flap 2; Valve gap 10 is set above valve body 1, is fixed with groove 11 on the valve gap 10, be fixed with convexity 12 on the valve body 1, said groove 11 cooperatively interacts with protruding 12; Between groove 11 and protruding 12, Composition spacer 13 is set; Between valve body 1 and last corrugated header 8, seal ring 9 is set, annular lug 14 is set on valve gap 10, annular lug 14 cooperations are arranged between valve body 1 and the last corrugated header 8, in the top of seal ring 9; Valve gap 10 is connected with valve body 1 through bolt 3.
Claims (1)
1. high pressure bellows screw down nonreturn valve comprises valve body, flap, and valve rod, handwheel and bellows is characterized in that: between said valve rod and flap, spring is set; Corrugated header in the welding of the upper end of said bellows, the lower end of said bellows is welded on the flap; Above said valve body, valve gap is set, fixedly installs the groove and convexity that cooperatively interact between said valve gap and the valve body respectively, between said groove and convexity, Composition spacer is set; Between said valve body and last corrugated header, seal ring is set, on said valve gap, annular lug is set, said annular lug cooperation is arranged between valve body and the last corrugated header, in the top of seal ring; Said valve gap is connected with valve body through bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203906293U CN202252179U (en) | 2011-10-14 | 2011-10-14 | Stop check valve for high-pressure bellows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203906293U CN202252179U (en) | 2011-10-14 | 2011-10-14 | Stop check valve for high-pressure bellows |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202252179U true CN202252179U (en) | 2012-05-30 |
Family
ID=46113422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203906293U Expired - Fee Related CN202252179U (en) | 2011-10-14 | 2011-10-14 | Stop check valve for high-pressure bellows |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202252179U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035899A (en) * | 2017-04-28 | 2017-08-11 | 武汉武船机电模块有限责任公司 | A kind of kingston valve with check function |
| CN108426038A (en) * | 2018-05-09 | 2018-08-21 | 盐城市大昌石化设备有限公司 | A kind of high-pressure resistant corrugated pipe shut-off valve |
| CN108561563A (en) * | 2018-05-31 | 2018-09-21 | 南通国电电站阀门股份有限公司 | Nuclear power island heart bellows guide type screw down nonreturn valve |
-
2011
- 2011-10-14 CN CN2011203906293U patent/CN202252179U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035899A (en) * | 2017-04-28 | 2017-08-11 | 武汉武船机电模块有限责任公司 | A kind of kingston valve with check function |
| CN108426038A (en) * | 2018-05-09 | 2018-08-21 | 盐城市大昌石化设备有限公司 | A kind of high-pressure resistant corrugated pipe shut-off valve |
| CN108561563A (en) * | 2018-05-31 | 2018-09-21 | 南通国电电站阀门股份有限公司 | Nuclear power island heart bellows guide type screw down nonreturn valve |
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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: 20120530 Termination date: 20151014 |
|
| EXPY | Termination of patent right or utility model |