CN204201131U - A kind of bellows stop valve - Google Patents
A kind of bellows stop valve Download PDFInfo
- Publication number
- CN204201131U CN204201131U CN201420619860.9U CN201420619860U CN204201131U CN 204201131 U CN204201131 U CN 204201131U CN 201420619860 U CN201420619860 U CN 201420619860U CN 204201131 U CN204201131 U CN 204201131U
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- China
- Prior art keywords
- valve rod
- valve
- bellows
- guide ring
- guide pad
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Abstract
A kind of bellows stop valve, valve rod is set with bellows, the upper end of bellows is welded with upper guide ring, the lower end of bellows is welded with lower guide ring, to distribute more than one boss in the circumference of lower guide ring, valve gap has groove in the section corresponding with the trip segment that lower guide ring moves up and down, and boss embeds in groove.The beneficial effects of the utility model are: lower guide ring arranges boss, boss is embedded in the structure in groove corresponding on valve gap, further valve rod is played to the effect of anti-rotation on the one hand, the rotation of valve rod can be limited when the guide pad being positioned at valve gap outside lost efficacy, protect bellows, ensure that sealability; On the other hand, further leading role is played to valve rod, improve the stationarity of valve rod in lifting process, avoid the torsional deformation of valve rod, thus ensure that the sealing at spool place.
Description
Art
The utility model relates to a kind of stop valve, particularly a kind of bellows stop valve.
Background technique
Stop valve is the usual means of control media circulation on industrial pipeline, at some, usually bellows stop valve is adopted to the medium strict field controlled that leaks outside, in bellows stop valve, sealing effect is preferably and adopts bellows and filler double seal, to reach the object of valve rod position zero leakage.
But bellows stop valve still exists a lot of deficiency, such as:
(1) bellows can only bear thrust load, can not bear circumferential load, and this just requires that the valve rod of bellows stop valve can not produce rotation in the process of moving up and down, to ensure the sealability of bellows.In prior art, often adopt the method for setting up guide pad on the valve rod being positioned at valve gap outside to prevent the rotation of valve rod, described guide pad is bolted on valve rod, such fastening means is easy to lose efficacy in the process of Long-Time Service, cause guide pad to come off, can not effectively carry out spacing to the rotation of valve rod, cause bellows distortion, seal failure, causes valve leakage out of steam system;
(2) distance of stretch out and draw back up and down of bellows stop valve is longer, this just needs corresponding shaft length to lengthen, the rigidity of valve rod is caused to diminish, easily there is torsional deformation, be difficult to the stability ensureing that valve rod moves up and down, also guide pad is just relied on to carry out leading role in current bellows stop valve, and guide pad is often positioned at valve body outside, distance spool is far away, in the reciprocating process of valve rod, easily there is torsional deformation in concrete guide pad valve rod remotely, makes the seal failure at spool place, can not ensure the sealability of stop valve.
Model utility content
In order to overcome the above-mentioned shortcoming of prior art, the utility model provides a kind of effective protection valve rod to rotate the bellows stop valve preventing bellows to lose efficacy because of distortion.
The utility model solves the technological scheme that its technical problem adopts, a kind of bellows stop valve, comprise valve body, valve gap, valve rod, spool, valve rod one end to extend in valve body through valve gap and is connected with spool, the other end is connected with drive unit, valve gap top is fixedly connected with drive unit, be fixedly connected with valve body bottom valve gap, support is provided with between bottom valve gap top and valve gap, valve rod is set with bellows, the upper end of bellows is welded with upper guide ring, the lower end of bellows is welded with lower guide ring, the upper end portion of upper guide ring is welded with valve gap, the underpart of lower guide ring is welded with valve rod, filler is provided with between upper guide ring and valve rod, filler is by being sleeved on filler pressing sleeve on valve rod successively and Gland is fixed, the valve rod being positioned at Gland top is provided with play and prevents the guide pad that valve rod rotates and guides stem moves up and down, to distribute more than one boss in the circumference of lower guide ring, valve gap has groove in the section corresponding with the trip segment that lower guide ring moves up and down, boss embeds in groove.
Guide pad is formed by two guide pad parts assemblings, guide pad parts assembling is on described valve rod, and fixed by fastening piece, rectangular inner surface is formed after guide pad parts assembling, the outer surface of valve rod in fastening piece fastening direction is set to plane, fits with a wherein effects on surface of rectangular inner surface, to limit the rotation of valve rod in guide pad, external frame and the support phase setting-in of guide pad, with the rotation of restricted guidance block.
The beneficial effects of the utility model are: lower guide ring arranges boss, boss embeds the structure in groove corresponding on valve gap, further valve rod is played to the effect of anti-rotation on the one hand, the rotation of valve rod can be limited when the guide pad being positioned at valve gap outside lost efficacy, protect bellows, ensure that sealability, and the rotation prevention structure being arranged on valve gap inside compares outside guide pad long service life, not easily loses efficacy; On the other hand, further leading role is played to valve rod, improve the stationarity of valve rod in lifting process, avoid the torsional deformation of valve rod, thus ensure that the sealing at spool place.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment;
Fig. 2 is A-A sectional view in Fig. 1;
Fig. 3 is B-B sectional view in Fig. 1.
In figure: 1. drive unit; 2. valve rod; 3. support; 4. guide pad; 5. Gland; 6. filler pressing sleeve; 7. filler; 8. go up guide ring; 9. bellows; 10. valve gap; 11. times guide rings; 12. valve bodies; 13. spools; 14. grooves; 15. boss.
Embodiment
As Fig. 1, 2, shown in 3, a kind of bellows stop valve, comprise valve body 12, valve gap 10, valve rod 2, spool 13, valve rod 2 one end to extend in valve body 12 through valve gap 10 and connects 13 with spool and connects, valve gap 10 the other end is connected with drive unit 1, valve gap 10 top is fixedly connected with drive unit 1, be fixedly connected with valve body 12 bottom valve gap 10, support 3 is provided with between bottom valve gap 10 top and valve gap 10, valve rod 2 is set with bellows 9, the upper end of bellows 9 is welded with upper guide ring 8, the lower end of bellows 9 is welded with lower guide ring 11, the upper end portion of upper guide ring 8 is welded with valve gap 10, the underpart of lower guide ring 11 is welded with valve rod 2, filler 7 is provided with between upper guide ring 8 and valve rod 2, filler 7 is by being sleeved on filler pressing sleeve 6 on valve rod 2 successively and Gland 5 is fixed, the valve rod 2 being positioned at Gland 5 top is provided with play and prevents the guide pad 4 that valve rod rotates and guides stem moves up and down, to distribute more than one boss 15 in the circumference of lower guide ring 11, being preferably two or more and being uniformly distributed in the circumference of lower guide ring 11 of boss 15, valve gap 10 has groove 14 in the section corresponding with the trip segment that lower guide ring 11 moves up and down, boss 15 embeds in groove 14, thus can ensure that valve rod 2 lower guide ring 11 in lifting process can be walked in groove 14, and the stroke distances of valve rod 2 can not be had influence on, such structure can play anti-rotation effect to valve rod 2, leading role can be played again to valve rod 2.
Guide pad 4 is formed by two guide pad parts assemblings, guide pad parts assembling is on described valve rod 2, and fixed by fastening piece, rectangular inner surface is formed after guide pad parts assembling, the outer surface of valve rod 2 in fastening piece fastening direction is set to plane, fit with the corresponding surface of rectangular inner surface, to limit the rotation of valve rod 2 in guide pad 4, external frame and the support 3 phase setting-in of guide pad 4, with the rotation of restricted guidance block 4, such structure is simple, and easy accessibility can effectively play the object preventing valve rod from rotating.
Claims (2)
1. a bellows stop valve, comprise valve body, valve gap, valve rod, spool, described valve rod one end to extend in valve body through valve gap and is connected with spool, the other end is connected with drive unit, described valve gap top is fixedly connected with drive unit, be fixedly connected with valve body bottom described valve gap, support is provided with between bottom described valve gap top and valve gap, described valve rod is set with bellows, the upper end of described bellows is welded with upper guide ring, the lower end of described bellows is welded with lower guide ring, the upper end portion of described upper guide ring is welded with valve gap, the underpart of described lower guide ring is welded with valve rod, filler is provided with between described upper guide ring and valve rod, described filler is by being sleeved on filler pressing sleeve on valve rod successively and Gland is fixed, the described valve rod being positioned at Gland top is provided with play and prevents the guide pad that valve rod rotates and guides stem moves up and down, it is characterized in that: to distribute more than one boss in the circumference of described lower guide ring, described valve gap has groove in the section corresponding with the trip segment that lower guide ring moves up and down, described boss is embedded in described groove.
2. bellows stop valve according to claim 1, it is characterized in that: described guide pad is formed by two guide pad parts assemblings, described guide pad parts assembling is on described valve rod, and fixed by fastening piece, rectangular inner surface is formed after described guide pad parts assembling, the outer surface of described valve rod in fastening piece fastening direction is set to plane, fit with a wherein effects on surface of described rectangular inner surface, to limit the rotation of described valve rod in described guide pad, external frame and the described support phase setting-in of described guide pad, to limit the rotation of described guide pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420619860.9U CN204201131U (en) | 2014-10-24 | 2014-10-24 | A kind of bellows stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420619860.9U CN204201131U (en) | 2014-10-24 | 2014-10-24 | A kind of bellows stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204201131U true CN204201131U (en) | 2015-03-11 |
Family
ID=52659095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420619860.9U Active CN204201131U (en) | 2014-10-24 | 2014-10-24 | A kind of bellows stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204201131U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443782A (en) * | 2015-12-25 | 2016-03-30 | 西安航天远征流体控制股份有限公司 | Corrugated tube stop valve |
| CN105485351A (en) * | 2016-01-19 | 2016-04-13 | 浙江纽顿流体控制有限公司 | Medium-scouring-free corrugated pipe stop valve |
| CN105587875A (en) * | 2014-10-24 | 2016-05-18 | 江苏神通阀门股份有限公司 | Corrugated pipe stop valve |
-
2014
- 2014-10-24 CN CN201420619860.9U patent/CN204201131U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587875A (en) * | 2014-10-24 | 2016-05-18 | 江苏神通阀门股份有限公司 | Corrugated pipe stop valve |
| CN105443782A (en) * | 2015-12-25 | 2016-03-30 | 西安航天远征流体控制股份有限公司 | Corrugated tube stop valve |
| CN105485351A (en) * | 2016-01-19 | 2016-04-13 | 浙江纽顿流体控制有限公司 | Medium-scouring-free corrugated pipe stop valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |