CN201162839Y - Bellows stop valve - Google Patents
Bellows stop valve Download PDFInfo
- Publication number
- CN201162839Y CN201162839Y CNU2008200843375U CN200820084337U CN201162839Y CN 201162839 Y CN201162839 Y CN 201162839Y CN U2008200843375 U CNU2008200843375 U CN U2008200843375U CN 200820084337 U CN200820084337 U CN 200820084337U CN 201162839 Y CN201162839 Y CN 201162839Y
- Authority
- CN
- China
- Prior art keywords
- valve
- corrugated pipe
- bellows
- corrugated
- cap
- 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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- Details Of Valves (AREA)
Abstract
The utility model relates to a corrugated pipe stop valve which comprises a valve body, a valve core, a valve rod, a valve cover and a corrugated pipe; wherein, the lower part of the valve rod is sleeved with the corrugated pipe; the lower end of the corrugated pipe is fixedly and hermetically connected with the valve core; essentially, the upper end of the corrugated pipe is fixed between the valve body and the valve cover through a corrugated cap; the corrugated pipe is fixedly and hermetically with the corrugated cap; when the valve rod moves, the elastic function of the corrugated cap enables the upper end of the corrugated pipe to elastically float, thus reducing the stretching fatigue damage of the corrugated pipe in the opening and closing process of the valve and ensuring service life and sealing reliability. Therefore, the corrugated pipe stop valve is applicable to working conditions with high temperature, high pressure and abrasion medium.
Description
Technical field
The utility model belongs to valve type, specifically about a kind of bellows stop valve.
Background technique
Bellows stop valve generally is made up of valve body, spool, valve rod, valve gap, bellows, drive spool by moving up and down of valve rod and come opening of control valve and pass or aperture, but medium can leak into the valve body outside by stuffing box packing along valve rod when opening state, cause valve to produce to run, emit, weeping, more outstanding when the high pressure operating mode is used especially.For this reason, people put metal bellows in stem lower portion, and the one end is welded on the spool, and the other end is fixed on valve gap or the valve body, and valve rod is moved in flexible bellows, and the medium of having stopped in the valve pocket leaks into the valve body outside along valve rod by stuffing box packing.But, the stop valve of this sylphon seal structure, because the stop valve bellows is all fixedly connected, in opening-closing process repeatedly, the easy fatigue damage of bellows and leaking, working life is short, and sealing reliability is poor.
Summary of the invention
The purpose of this utility model is the shortcoming that exists at prior art, provides a kind of long service life, the bellows stop valve that sealing reliability is good.
The technical solution of the utility model comprises valve body, spool, valve rod, valve gap, bellows, put bellows in stem lower portion, the fixed seal connection of bellows lower end is on spool, mainly be that fixed seal connection between bellows and the ripple cap is fixed between valve body and the valve gap in the bellows upper end by a ripple cap.
Be fixed between valve body and the valve gap by a ripple cap on the utility model has the advantages that bellows, when valve rod moves, because the elastic reaction of ripple cap can float the bellows upper end, the tensile fatigue that reduces bellows in the valve opening and closing process damages, and improves the working life and the sealing reliability of bellows and valve.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Bellows stop valve as shown in Figure 1 comprises valve body 1, spool 3, valve rod 8, valve gap 6, bellows 5, the valve seat 2 of the sealing surface weld deposit cemented carbide between valve body 1 and the spool 3.Valve rod 8 bottoms put bellows 5, and bellows 5 adopts stainless steel material, and its lower end seal welding also can be fitted on the spool 3 by gland nut 4 sealings on spool 3.Bellows 5 upper ends and 7 fixed seal connections of ripple cap, ripple cap 7 has elasticity, and its periphery press-fits between valve body 1 and valve gap 6, and bellows 5 upper ends can reduce the tensile fatigue of bellows 5 with ripple cap 7 elastic floatings during valve opening and closing.Be provided with stuffing box packing 9 between valve gap 6 and the valve rod 8, sealing filler 9 is press-fited by Gland 10.Valve rod 8 tops are a positioning block 11 fixedly, and valve rod 8 is connected by Stem Mut 12 with handwheel 13, and the upper-end surface of the lower end surface of Stem Mut 12 and positioning block 11 limits the climb of valve rod 8.
Claims (1)
1, a kind of bellows stop valve, comprise valve body (1), spool (3), valve rod (8), valve gap (6), bellows (5), put bellows (5) in valve rod (8) bottom, bellows (5) lower end fixed seal connection is on spool (3), it is characterized in that being fixed between valve body (1) and the valve gap (6) fixed seal connection between bellows (5) and the ripple cap (7) by a ripple cap (7) on the bellows (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200843375U CN201162839Y (en) | 2008-03-14 | 2008-03-14 | Bellows stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200843375U CN201162839Y (en) | 2008-03-14 | 2008-03-14 | Bellows stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201162839Y true CN201162839Y (en) | 2008-12-10 |
Family
ID=40183776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200843375U Expired - Fee Related CN201162839Y (en) | 2008-03-14 | 2008-03-14 | Bellows stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201162839Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508707A (en) * | 2016-03-01 | 2016-04-20 | 马鞍山市润启新材料科技有限公司 | Valve stem |
| CN105526421A (en) * | 2016-03-01 | 2016-04-27 | 马鞍山市润启新材料科技有限公司 | Valve rod |
| CN105546207A (en) * | 2016-03-01 | 2016-05-04 | 马鞍山市润启新材料科技有限公司 | Valve rod for ship |
| CN105605295A (en) * | 2016-03-01 | 2016-05-25 | 马鞍山市润启新材料科技有限公司 | Corrugated pipe valve rod |
-
2008
- 2008-03-14 CN CNU2008200843375U patent/CN201162839Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508707A (en) * | 2016-03-01 | 2016-04-20 | 马鞍山市润启新材料科技有限公司 | Valve stem |
| CN105526421A (en) * | 2016-03-01 | 2016-04-27 | 马鞍山市润启新材料科技有限公司 | Valve rod |
| CN105546207A (en) * | 2016-03-01 | 2016-05-04 | 马鞍山市润启新材料科技有限公司 | Valve rod for ship |
| CN105605295A (en) * | 2016-03-01 | 2016-05-25 | 马鞍山市润启新材料科技有限公司 | Corrugated pipe valve rod |
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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: 20081210 Termination date: 20130314 |