CN202176815U - Two-way bellows stop valve - Google Patents
Two-way bellows stop valve Download PDFInfo
- Publication number
- CN202176815U CN202176815U CN2011202537605U CN201120253760U CN202176815U CN 202176815 U CN202176815 U CN 202176815U CN 2011202537605 U CN2011202537605 U CN 2011202537605U CN 201120253760 U CN201120253760 U CN 201120253760U CN 202176815 U CN202176815 U CN 202176815U
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- valve
- valve rod
- bellows
- rod
- head
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Abstract
The utility model discloses a two-way bellows stop valve comprising a valve body, a valve rod, a valve cover, a valve head and a bellows, wherein a valve cavity for media circulation is formed in the valve body; the valve cover is hermetically connected with the valve body; the valve rod comprises an upper valve rod and a lower valve rod, and the lower valve rod passes through the valve cover and extends into the valve cavity to connect with the valve head; the bellows is sleeved on the lower valve body, and an upper end port of the bellows is welded on the upper end of the lower valve rod while the lower end port thereof is welded on the valve cover; a locating device for locating the upper valve rod is arranged above the lower valve rod, and a transmission structure for driving the lower valve rod to move up and down when the upper valve rod is in positive or negative rotation is arranged between the upper valve rod and the lower valve rod. In the two-way bellows stop valve, the lower end port of the bellows and the valve core are welded together, and the upper end port of the bellows and the lower valve rod are welded together, which is convenient for adjustment of technology order, and not only guarantees that the screw threads is not damaged in the wielding process, but also completely guarantees the coaxiality of the screw threads.
Description
Technical field
The utility model relates to valve, particularly a kind of two logical bellows stop valves.
Background technique
Bellows stop valve is valve class Cenozoic product, and its with the obvious advantage, simple and reasonable, function admirable, sealing reliability are high, easy to operate brisk, of many uses, is applicable to different medium occasions such as inflammable, explosive, hypertoxic, vacuum.The toxic gas that some bellows stop valve is applied on the transformer equipment is dredged occasion, and safety class requires high, but at present existing bellows stop valve has many shortcomings, influences the normal sealability of using of valve during such as bellows and valve head welding; Bellows and the welding of other part are difficult; The resistance that bellows directly and too much bears media flow and produced, bellows possibly ftracture from weld.
The upper end bead and the valve gap of the bellows of some bellows stop valve welds together on the market, and the lower end bead and the valve head of bellows weld together, and the three becomes one.Because stuffing box packing need be installed in the valve head lower end; Stuffing box packing has been again the effect of valve seal; Therefore, the installation coaxality of valve head and all will influence the sealability of valve with planeness of stuffing box packing surface of contact or the like, and bellows and valve head welding exactly are difficult to guarantee the coaxality of valve head; High temperature during welding is easy to cause valve head and the distortion of stuffing box packing surface of contact again, and bellows, valve head and valve gap three have very big shortcoming for the structure of one thus.In addition, because just bellows is continuous between valve head and the valve gap, so difficulty is very big when two and bellows welding; Moreover bellows is in the valve seal chamber; The valve resistance that media flow produced at work acts directly on the bellows, is easy to make bellows to ftracture from weld, moreover; According to weld properties; Intensity under the weld seam compression situation is far longer than the intensity under the pulled out condition, and weld strength is than compression little many of weld strength during state when extended state to that is to say bellows, and therefore bellows design is become extended state is imperfect to above-mentioned bellows stop valve.
Summary of the invention
The utility model problem to be solved just provides a kind of two logical bellows stop valves, and is simple and reasonable, through design improvement; Further improved the working life of bellows; Reduced the stem movement resistance, operation becomes more laborsaving, and sealability is more reliable.
In order to solve the problems of the technologies described above; The utility model adopts following technological scheme: a kind of two logical bellows stop valves, comprise valve body, valve rod, valve gap, valve head and bellows, and be provided with the valve pocket that supplies the medium circulation in the valve body; Valve gap is connected with valve seal; It is characterized in that: valve rod comprises upper valve rod and lower valve rod, and the lower valve rod lower end is passed valve gap and extend in the valve pocket and be connected with valve head, and bellows is enclosed within on the lower valve rod; The upper end bead of bellows is welded on the lower valve rod upper end; The lower end bead of bellows is welded on the valve gap, above lower valve rod, is provided with the positioning device of location upper valve rod, the drive mechanism that when being provided with in the positive and negative rotation of upper valve rod between upper valve rod and the lower valve rod, lower valve rod is moved up and down.
Further; Said positioning device comprises the valve bonnet that is located at that valve gap top is connected with valve seal and bellows is covered; Be provided with in the valve bonnet and keep supplying the through hole that valve rod installs, the upper end of upper valve rod upwards passes valve bonnet, between upper valve rod and valve bonnet, is provided with the position structure of axially locating upper valve rod.
Further; Said position structure comprises radial convex loop and the radial groove that is located on the upper valve rod; And be located on through hole hole wall one end the screens step be located at the snap ring on the through hole the other end end face, upper valve rod is stuck in axially the moving and be stuck in the radial groove moving of another direction on the limit axial through snap ring of a last direction of screens step limit through radial convex loop.
Further, be provided with seal ring between said upper valve rod and the through hole, the hole wall of through hole is provided with the annular groove of location seal ring.
Further, said drive mechanism comprises the thread section that is located at the upper valve rod lower end and is located at the internal thread that cooperates with thread section in the lower valve rod upper end, is provided with the card distribution structure that the restriction lower valve rod rotates between lower valve rod and the valve gap.
Further, said card distribution structure comprises the axial notch I that is located on the lower valve rod outer side wall and is located at the axial projection I on the valve gap inner hole wall that axial notch I cooperates with axial projection I and protruding to axial I slippage up and down.
Further, said card distribution structure comprises the axial projection II that is located on the lower valve rod outer side wall and is located at the axial notch II on the valve gap inner hole wall, axial projection II and axial notch II join be incorporated among the axial notch II about slippage.
Further, the lower end of said lower valve rod is provided with thread head, and valve head is provided with the tapped hole that cooperates with thread head, on valve head, is provided with the tightening structure of tightening thread head.
Further, the perforation said tightening structure comprises from valve head outer side wall lateral penetration to tapped hole and be located at the screw of tightening thread head in the perforation.
Further, said valve head bottom is provided with stuffing box packing and moves up and down the break-make that realizes valve pocket with lower valve rod.
After adopting technique scheme; The utlity model has following advantage: the lower end bead and the valve gap of bellows are welded together, and the upper end bead and the lower valve rod of bellows weld together, and make things convenient for the process sequence adjustment; Can earlier bellows, valve gap and lower valve rod three be welded together; And then the screw thread on the internal thread on the processing lower valve rod and thread head and the valve gap, screw thread was not damaged when this both can guarantee to weld, and can guarantee their coaxality fully yet.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is a kind of embodiment's of the utility model a structural representation;
Fig. 2 is that the card distribution structure between lower valve rod and the valve gap is implemented structural representation for first kind;
Fig. 3 is that the card distribution structure between lower valve rod and the valve gap is implemented structural representation for second kind;
Embodiment
A kind of embodiment's of the utility model as illustrated in fig. 1 and 2 structural representation; A kind of two logical bellows stop valves comprise valve body 1, valve rod 2, valve gap 3, valve head 4 and bellows 5, are provided with the valve pocket 11 that supplies the medium circulation in the valve body; Valve gap is connected with valve seal; Valve rod comprises upper valve rod 21 and lower valve rod 22, and the lower valve rod lower end is passed valve gap and extend in the valve pocket and be connected with valve head, and bellows is enclosed within on the lower valve rod; The upper end bead of bellows is welded on the lower valve rod upper end; The lower end bead of bellows is welded on the valve gap, above lower valve rod, is provided with the positioning device of location upper valve rod, the drive mechanism that when being provided with in the positive and negative rotation of upper valve rod between upper valve rod and the lower valve rod, lower valve rod is moved up and down.
Said positioning device comprises the valve bonnet 6 that is located at that valve gap top is connected with valve seal and bellows is covered; Be provided with in the valve bonnet and keep supplying the through hole 61 that valve rod installs; The upper end of upper valve rod upwards passes valve bonnet; Between upper valve rod and valve bonnet, be provided with the position structure of axially locating upper valve rod; Said position structure comprises the radial convex loop that is located on the upper valve rod 210 and radial groove 211, and be located on through hole hole wall one end screens step 611 be located at the snap ring 612 on the through hole the other end end face, upper valve rod is stuck in axially the moving and be stuck in the radial groove moving of another direction on the limit axial through snap ring of a last direction of screens step limit through radial convex loop; In the present embodiment; Radial convex loop is located at the below of radial groove, and the lower end restriction upper valve rod that the screens step is located at through hole moves up, and the upper-end surface limit upper valve rod that snap ring is located at valve bonnet moves down.Be provided with seal ring 613 between upper valve rod and the through hole, the hole wall of through hole is provided with the annular groove 614 of location seal ring, and in the present embodiment, annular groove is corresponding with radial convex loop.
Said drive mechanism comprises the thread section 212 that is located at the upper valve rod lower end and is located at the internal thread 221 that cooperates with thread section in the lower valve rod upper end, is provided with the card distribution structure that the restriction lower valve rod rotates between lower valve rod and the valve gap.Said card distribution structure comprises the axial notch I222 that is located on the lower valve rod outer side wall and is located at the axial projection I31 on the valve gap inner hole wall that axial notch I cooperates with axial projection I and protruding to axial I slippage up and down.
In the foregoing description; The lower end of lower valve rod is provided with thread head 224; Valve head is provided with the tapped hole 41 that cooperates with thread head; On valve head, be provided with the tightening structure of tightening thread head, perforation 42 said tightening structure comprises from valve head outer side wall lateral penetration to tapped hole and the screw 43 that is located at tightening thread head in the perforation.Be provided with stuffing box packing 7 in valve head bottom and move up and down the break-make that realizes valve pocket with lower valve rod.
In addition, as shown in Figure 3, said card distribution structure comprises the axial projection II223 that is located on the lower valve rod outer side wall and is located at the axial notch II32 on the valve gap inner hole wall, axial projection II and axial notch II join be incorporated among the axial notch II about slippage.
The working principle of the utility model is following:
To tighten valve clockwise, to turn on valve counterclockwise is example; Clockwise rotate the handwheel of upper valve rod upper end, the relative valve bonnet of upper valve rod is rotated, lower valve rod is limited to rotate because upper valve rod is limited to move axially; So when upper valve rod rotates; The thread section of upper valve rod is back-outed to come from the internal thread of lower valve rod, so the relative upper valve rod of lower valve rod moves downward, valve head and stuffing box packing move downward with lower valve rod and realize the valve pocket disconnection; In like manner; Rotate counterclockwise the handwheel of upper valve rod upper end, the relative valve bonnet of upper valve rod is rotated, lower valve rod is limited to rotate because upper valve rod is limited to move axially; So when upper valve rod rotates; The thread section of upper valve rod is screwed in the internal thread of lower valve rod, so the relative upper valve rod of lower valve rod moves upward, valve head and stuffing box packing move upward with lower valve rod and realize that valve pocket is communicated with.
In order to prevent that welding influence installs planeness of coaxality and valve head and stuffing box packing surface of contact or the like; The utility model welds together the lower end bead and the valve gap of bellows; The upper end bead and the lower valve rod of bellows weld together, and the three is structure as a whole, and make things convenient for the process sequence adjustment.Can earlier bellows, valve gap and lower valve rod three be welded together, and then internal thread on the processing lower valve rod and the screw thread on thread head and the valve gap, screw thread was not damaged when this both can guarantee to weld, and can guarantee their coaxality fully yet.Valve head and lower valve rod are designed to two parts,, thereby have avoided welding deformation and influence the problem of stuffing box packing surface of contact each other with being threaded.Moreover; Design for fear of existing structure---between valve head and the valve gap just the bellows institute that links to each other cause valve head and valve gap and bellows to weld the big problem of difficulty; Lower valve rod runs through bellows and valve gap in the utility model, when welding, plays the effect of skeleton and location, thereby is convenient to welding.On bellows, cause bellows to ftracture in addition from weld; This use is novel with the outside of bellows design to valve pocket; So valve at work, the resistance that media flow produced has acted directly on the valve rod, thereby has reduced the chance that bellows damages.Utilize weld properties---the intensity under the weld seam compression situation is far longer than the intensity under the pulled out condition; Improve the working life of valve; The utility model is employed under the compressive state and welds, thereby complies with weld strength performance and the bellows compression ratio characteristics greater than draw ratio.
Except that above-mentioned preferred embodiment; The utility model also has other mode of execution; Those skilled in the art can make various changes and distortion according to the utility model, only otherwise break away from the spirit of the utility model, all should belong to the defined scope of the utility model accompanying claims.
Claims (10)
1. a logical bellows stop valve comprises valve body (1), valve rod (2), valve gap (3), valve head (4) and bellows (5), is provided with the valve pocket (11) that supplies the medium circulation in the valve body; Valve gap is connected with valve seal; It is characterized in that: valve rod comprises upper valve rod (21) and lower valve rod (22), and the lower valve rod lower end is passed valve gap and extend in the valve pocket and be connected with valve head, and bellows is enclosed within on the lower valve rod; The upper end bead of bellows is welded on the lower valve rod upper end; The lower end bead of bellows is welded on the valve gap, above lower valve rod, is provided with the positioning device of location upper valve rod, the drive mechanism that when being provided with in the positive and negative rotation of upper valve rod between upper valve rod and the lower valve rod, lower valve rod is moved up and down.
2. according to claim 1 a kind of two logical bellows stop valves; It is characterized in that: said positioning device comprises the valve bonnet (6) that is located at that valve gap top is connected with valve seal and bellows is covered; Be provided with the through hole (61) of keeping supplying valve rod and installing in the valve bonnet; The upper end of upper valve rod upwards passes valve bonnet, between upper valve rod and valve bonnet, is provided with the position structure of axially locating upper valve rod.
3. according to claim 2 a kind of two logical bellows stop valves; It is characterized in that: said position structure comprises radial convex loop (210) and the radial groove (211) that is located on the upper valve rod; And be located at the screens step (611) on through hole hole wall one end and be located at the snap ring (612) on the through hole the other end end face, upper valve rod is stuck in axially the moving and be stuck in the radial groove moving of another direction on the limit axial through snap ring of a last direction of screens step limit through radial convex loop.
4. according to claim 2 or 3 described a kind of two logical bellows stop valves, it is characterized in that: be provided with seal ring (613) between said upper valve rod and the through hole, the hole wall of through hole is provided with the annular groove (614) of location seal ring.
5. according to claim 1 a kind of two logical bellows stop valves; It is characterized in that: said drive mechanism comprises the thread section (212) that is located at the upper valve rod lower end and is located at the internal thread (221) that cooperates with thread section in the lower valve rod upper end, is provided with the card distribution structure that the restriction lower valve rod rotates between lower valve rod and the valve gap.
6. according to claim 5 a kind of two logical bellows stop valves; It is characterized in that: said card distribution structure comprises the axial notch I (222) that is located on the lower valve rod outer side wall and is located at the axial projection I (31) on the valve gap inner hole wall that axial notch I cooperates with axial projection I and protruding to axial I slippage up and down.
7. according to claim 5 a kind of two logical bellows stop valves; It is characterized in that: said card distribution structure comprises the axial projection I I (223) that is located on the lower valve rod outer side wall and is located at the axial notch I I (32) on the valve gap inner hole wall, and axial projection II and axial notch II join and be incorporated in slippage up and down among the axial notch II.
8. according to claim 1 a kind of two logical bellows stop valves, it is characterized in that: the lower end of said lower valve rod is provided with thread head (224), and valve head is provided with the tapped hole (41) that cooperates with thread head, on valve head, is provided with the tightening structure of tightening thread head.
9. according to claim 8 a kind of two logical bellows stop valves is characterized in that: the perforation (42) said tightening structure comprises from valve head outer side wall lateral penetration to tapped hole and be located at the screw (43) of tightening thread head in the perforation.
10. according to claim 1,8 or 9 described a kind of two logical bellows stop valves, it is characterized in that: said valve head bottom is provided with stuffing box packing (7) and moves up and down the break-make that realizes valve pocket with lower valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202537605U CN202176815U (en) | 2011-07-18 | 2011-07-18 | Two-way bellows stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202537605U CN202176815U (en) | 2011-07-18 | 2011-07-18 | Two-way bellows stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176815U true CN202176815U (en) | 2012-03-28 |
Family
ID=45866693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202537605U Expired - Fee Related CN202176815U (en) | 2011-07-18 | 2011-07-18 | Two-way bellows stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202176815U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853161A (en) * | 2012-08-29 | 2013-01-02 | 铜陵艾纶纺织品有限责任公司 | Valve rod with positioning ring |
| CN102966789A (en) * | 2012-11-06 | 2013-03-13 | 浙江盾安阀门有限公司 | Multiply sealed corrugated pipe stop valve |
| CN113294587A (en) * | 2021-05-28 | 2021-08-24 | 上海华电阀门集团有限公司 | Bellows type metal seal valve |
-
2011
- 2011-07-18 CN CN2011202537605U patent/CN202176815U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853161A (en) * | 2012-08-29 | 2013-01-02 | 铜陵艾纶纺织品有限责任公司 | Valve rod with positioning ring |
| CN102966789A (en) * | 2012-11-06 | 2013-03-13 | 浙江盾安阀门有限公司 | Multiply sealed corrugated pipe stop valve |
| CN113294587A (en) * | 2021-05-28 | 2021-08-24 | 上海华电阀门集团有限公司 | Bellows type metal seal valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 311835 Zhuji port industrial area, Zhejiang Patentee after: ZHEJIANG DUNAN INTELLIGENT CONTROL TECHNOLOGY CO., LTD. Address before: 311835 Zhuji City, Zhejiang Province Industrial Zone, mouth shop Patentee before: Zhejiang Dun'an Valve Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120328 Termination date: 20190718 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |