CN202188220U - Bellows stop valve - Google Patents
Bellows stop valve Download PDFInfo
- Publication number
- CN202188220U CN202188220U CN2011203000202U CN201120300020U CN202188220U CN 202188220 U CN202188220 U CN 202188220U CN 2011203000202 U CN2011203000202 U CN 2011203000202U CN 201120300020 U CN201120300020 U CN 201120300020U CN 202188220 U CN202188220 U CN 202188220U
- Authority
- CN
- China
- Prior art keywords
- bellows
- valve rod
- valve
- shaft shoulder
- utility
- 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 discloses a bellows stop valve, which comprises a valve body and a valve rod arranged in the valve body, the lower part of the valve rod is provided with a bellows, the lower part of the valve rod is provided with a shaft shoulder which is integrally molded, and the lower end of the bellows is welded with the shaft shoulder. For the utility model, since the lower part of the valve rod is provided with the shaft shoulder which is integrally molded, and the lower end of the bellows is directly welded with the shaft shoulder without using a connecting pad, the axiality of the bellows and the valve rod can be guaranteed, the stress on the bellows is uniform during working, the service life of the bellows can be prolonged, meanwhile, the connecting point of the bellows can be reduced, dangerous leak points can be reduced, and the utility model has the advantages of simple machining technic, low rejection rate, high efficiency and low cost.
Description
Technical field
The utility model relates to stop valve, is specifically related to bellows stop valve.
Background technique
Bellows stop valve is mainly used in the pipeline of conveying gas or liquid; The main structure of existing bellows stop valve is as shown in Figure 1, comprises handwheel 1, Stem Mut 2, positioning block 3, Gland 4, filler 5, valve rod 6, nut 7, valve gap 8, double-layer seal pad 9, valve body 10, bellows component 11, flap 12 and straight pin 13.Wherein, bellows component 11 is the critical components in the bellows stop valve.Again referring to Fig. 2 and Fig. 3; Bellows component 11 is made up of bellows 14 and bellows connection pad 15 two-part; The lower end of bellows 14 and bellows connection pad 15 are welded as a whole earlier; And then be sleeved on the valve rod 6, fixing with the welding of the bottom of valve rod 6, the upper end of bellows 14 and double-layer seal pad 9 are placed on the junction surface of valve gap 8 and valve body 10 and fix.
When using bellows stop valve, through rotation hand wheel 1, the flap 12 that makes valve rod 6 drive its lower end moves up and down; Open and close stop valve; Along with moving up and down of valve rod 6, flap 12, bellows 14 also is stretched or compressed thereupon, and then separates through flowing medium medium and valve rod 6 that bellows 14 will get in the valve body 10; Between flowing medium medium and atmosphere, form a metallic barrier, thereby guarantee valve rod zero leakage.
Yet, some shortcomings below bellows stop valve of the prior art exists usually:
When (1), bellows 14 welds fixedly through bellows connection pad 15 with valve rod 6; Because bellows connection pad 15 adopts the Placement of welding with valve rod 6; Be difficult to guarantee perpendicularity and coaxality with valve rod 6; Cause bellows 14 unbalance stress in use, thereby shortened the working life of bellows 14.
(2), the lower end of bellows 14 is welded as a whole through bellows connection pad 15 and valve rod 6, increased a dangerous leak point.
(3), the Placement of this bellows, tie point is many, processing technology is complicated, scrappage is high, efficient is low, cost is high thereby cause.
The model utility content
The utility model technical problem to be solved is to solve bellows stop valve in use; Because the lower end of bellows is through connection pad and valve rod welding; Cause the bellows discontinuity, working life weak point, dangerous leak point, tie point is many and because complicated scrappage height, efficient is low, cost the is high problem of causing of processing technology.
In order to solve the problems of the technologies described above; The technological scheme that the utility model adopted provides a kind of bellows stop valve; Comprise valve body and the valve rod that is arranged in the valve body; The bottom of said valve rod is provided with bellows, and the bottom of said valve rod has the shaft shoulder of an one forging molding, the lower end of said bellows and the welding of the said shaft shoulder.
In such scheme, the upper surface of the shaft shoulder on the said valve rod is provided with the step axle of minor diameter, and the lower end of said bellows is sleeved on the said step axle.
In such scheme, said step axle is up-small and down-big cone table shape.
The utility model, owing to the shaft shoulder that is provided with the one forging molding in the bottom of valve rod, the direct and shaft shoulder welding in bellows lower end avoids the use of connection pad; Therefore, guarantee the coaxality of bellows and valve rod, made bellows in use stressed evenly, prolonged the working life of bellows; Simultaneously, reduce the tie point of bellows, reduced dangerous leak point; Processing technology is simple, has improved manufacturing efficiency, has reduced cost.
Description of drawings:
Fig. 1 is existing bellows stop valve structural representation.
Fig. 2 is existing valve rod schematic representation.
Fig. 3 is that existing valve rod is connected schematic representation with bellows component.
Fig. 4 is the utility model bellows stop valve structural representation.
Fig. 5 is the utility model valve rod schematic representation.
Fig. 6 is that the utility model valve rod is connected schematic representation with bellows.
Embodiment
The utility model is the improvement of carrying out on the basis of the bellows stop valve that in background technique, provides, and main improvement is the Placement of valve rod and bellows, and other structures are identical with existing technology, repeat no more at this.
Below in conjunction with accompanying drawing the utility model is made detailed explanation.
Fig. 4 is the structural representation of the utility model, and bellows stop valve comprises handwheel 1, Stem Mut 2, positioning block 3, Gland 4, filler 5, valve rod 6, nut 7, valve gap 8, double-layer seal pad 9, valve body 10, bellows 14, flap 12 and straight pin 13.
Wherein, The right ends of valve body 10 is respectively equipped with flowing medium inlet and flowing medium outlet, and flowing medium inlet and flowing medium outlet are communicated with through connection mouth, and flap 12 is fixed on the lower end of valve rod 6; And it is relative with connection mouth; The top of bellows 14 is fixed with double-layer seal pad 9, and double-layer seal pad 9 is placed on the junction surface of valve gap 8 and valve body 10, and fixing through nut 7.When bellows stop valve was worked, rotation hand wheel 1 made valve rod 6 drive flap 12 and moves up and down, and opens and closes stop valve.Along with moving up and down of valve rod 6, bellows 14 also is stretched or compressed thereupon, and then separates through flowing medium and valve rod 6 that bellows 14 will get into valve body 10, between flowing medium and atmosphere, forms a metallic barrier, guarantees valve rod 6 zero leakages.
Fig. 5 is the structural representation of the utility model valve rod 6, and Fig. 6 is the utility model valve rod 6 and bellows 14 assembling schematic representation.Visible in conjunction with Fig. 5, Fig. 6, add man-hour at valve rod forging, shaft shoulder 16 of one forging molding in the bottom of valve rod, bellows 14 is welded on the shaft shoulder 16.
For the ease of the installation of bellows 14, the upper surface of the shaft shoulder 16 is provided with the step axle of minor diameter, and this step axle is up-small and down-big cone table shape.When bellows lower end and valve rod 6 welding, earlier bellows 14 is sleeved on the step axle, because the step axle is up-small and down-big cone table shape, therefore, guarantee the coaxality of bellows 14 and valve rod 6 more easily.
Valve rod 6 forged to be processed into have the shaft shoulder 14 that upper surface is a cone table shape, directly weld, avoid the use of the bellows connection pad with the lower end of bellows 14; Guaranteed the coaxality of bellows 14, made bellows 14 in use stressed evenly, prolonged the working life of bellows 14 with valve rod 6; Simultaneously, the tie point of bellows 14 is reduced, reduced dangerous leak point; And it is simple to have processing technology, the advantage that scrappage is low, efficient is high, cost is low.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of under enlightenment of the present invention, making, and every have identical or close technological scheme with the present invention, all falls within protection scope of the present invention.
Claims (3)
1. bellows stop valve comprises valve body and the valve rod that is arranged in the valve body, and the bottom of said valve rod is provided with bellows, it is characterized in that, the bottom of said valve rod has the shaft shoulder of an one forging molding, the lower end of said bellows and the welding of the said shaft shoulder.
2. bellows stop valve as claimed in claim 1 is characterized in that, the upper surface of the shaft shoulder on the said valve rod is provided with the step axle of minor diameter, and the lower end of said bellows is sleeved on the said step axle.
3. bellows stop valve as claimed in claim 1 is characterized in that, said step axle is up-small and down-big cone table shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203000202U CN202188220U (en) | 2011-08-18 | 2011-08-18 | Bellows stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203000202U CN202188220U (en) | 2011-08-18 | 2011-08-18 | Bellows stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202188220U true CN202188220U (en) | 2012-04-11 |
Family
ID=45919671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203000202U Expired - Fee Related CN202188220U (en) | 2011-08-18 | 2011-08-18 | Bellows stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202188220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954283A (en) * | 2012-10-29 | 2013-03-06 | 浙江盾安阀门有限公司 | Corrugated tube welding assembly and production method thereof |
-
2011
- 2011-08-18 CN CN2011203000202U patent/CN202188220U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954283A (en) * | 2012-10-29 | 2013-03-06 | 浙江盾安阀门有限公司 | Corrugated tube welding assembly and production method thereof |
| CN102954283B (en) * | 2012-10-29 | 2014-01-08 | 浙江盾安阀门有限公司 | Corrugated tube welding assembly and production method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120411 Termination date: 20180818 |