CN204099713U - Be provided with the valve cover portion sealing configuration of high-pressure bellows - Google Patents
Be provided with the valve cover portion sealing configuration of high-pressure bellows Download PDFInfo
- Publication number
- CN204099713U CN204099713U CN201420460248.1U CN201420460248U CN204099713U CN 204099713 U CN204099713 U CN 204099713U CN 201420460248 U CN201420460248 U CN 201420460248U CN 204099713 U CN204099713 U CN 204099713U
- Authority
- CN
- China
- Prior art keywords
- pressure bellows
- valve rod
- cover portion
- pressure
- sealing configuration
- 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 kind of valve cover portion sealing configuration being provided with high-pressure bellows, it comprises a valve gap body, a valve rod and a high-pressure bellows, described high-pressure bellows and described valve rod are positioned at described valve gap body, described high-pressure bellows is sheathed on described valve rod, described valve rod is installed with a stepped part, the lower end of described high-pressure bellows is welded in described stepped part, the upper end of described high-pressure bellows is with the affixed corrugated header of welding manner, described valve rod is arranged in described corrugated header, described corrugated header and described valve gap body affixed.The utility model has good sealability, reduces the leakage probability of medium, in addition, also has and uses stable advantage.
Description
Technical field
The utility model relates to a kind of valve cover portion sealing configuration being provided with high-pressure bellows.
Background technique
For the valve that operating mode occasion that is inflammable, explosive, poisonous, high pressure uses, be usually provided with the sealing configuration of high-pressure bellows at its valve cover portion.Mostly contain radioactivity or toxic substance by the medium of valve under aforementioned case, therefore, once medium leaks outside, it can bring heavy losses and serious harm.The existing sealing configuration being provided with high-pressure bellows is mostly solve by packing seal the problem that medium leaks outside.Because such sealing configuration only relies on filler to seal, therefore, its poor sealing performance, the probability that its using process medium is revealed is larger.
Model utility content
The technical problems to be solved in the utility model is the defect that there is poor sealing performance in order to overcome prior art, provides a kind of valve cover portion sealing configuration being provided with high-pressure bellows.
The utility model solves above-mentioned technical problem by following technical proposals:
A kind of valve cover portion sealing configuration being provided with high-pressure bellows, it comprises a valve gap body, a valve rod and a high-pressure bellows, described high-pressure bellows and described valve rod are positioned at described valve gap body, described high-pressure bellows is sheathed on described valve rod, its feature is, described valve rod is installed with a stepped part, the lower end of described high-pressure bellows is welded in described stepped part, the upper end of described high-pressure bellows is with the affixed corrugated header of welding manner, described valve rod is arranged in described corrugated header, described corrugated header and described valve gap body affixed.
Preferably, be provided with a packing seal assembly between described valve rod and described valve gap body, described packing seal assembly is positioned at the top of described corrugated header.
Preferably, described packing seal assembly comprises a filler, a guide pipe and a lining, and described lining is sheathed on described valve rod, and described guide pipe is sheathed on described lining, and described filler is positioned at the below of described lining and described guide pipe.
Positive progressive effect of the present utility model is: the utility model has good sealability, reduces the leakage probability of medium; Special is in poisonous, volatile operating mode at medium, and the utility model has more significant sealability, and has the stable advantage of use
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model preferred embodiment.
Embodiment
Lift preferred embodiment below, and come by reference to the accompanying drawings clearlyer intactly the utility model to be described.
As shown in Figure 1, a kind of valve cover portion sealing configuration being provided with high-pressure bellows, it comprises valve gap body 1, valve rod 2 and high-pressure bellows 3, high-pressure bellows 3 and valve rod 2 are positioned at valve gap body 1, and high-pressure bellows 3 is sheathed on valve rod 2, valve rod 2 are installed with stepped part 21, the lower end of high-pressure bellows 3 is welded in stepped part 21, the upper end of high-pressure bellows 3 is with the affixed corrugated header 4 of welding manner, and valve rod 2 is arranged in described corrugated header 4, and corrugated header 4 is affixed with valve gap body 1.
High-pressure bellows is existing parts, and its tube wall can stretch after stressed.In said structure, valve rod can move up or down, because the stepped part on the lower end of high-pressure bellows and valve rod is affixed, then also move up or down with valve rod in the lower end of high-pressure bellows, namely high-pressure bellows compression or stretch, now, due to corrugated header and valve gap body affixed, therefore, corrugated header does not move with valve rod.
Like this, the outer wall of the step of the lower end surface of corrugated header, the outer wall of high-pressure bellows and valve rod forms a good seal space, makes the utility model have good sealability, reduces the leakage probability of medium.Special is in poisonous, volatile operating mode at medium, and the utility model has more significant sealability, and has the stable advantage of use.
In said structure, welding between high-pressure bellows with stepped part, welding between valve rod with high-pressure bellows seat all can adopt overall diffusion welding mode to weld, and by welding, make valve rod, high-pressure bellows become as a whole with corrugated header.Diffusion welding is fitted tightly by weldment, under uniform temperature and pressure, the face of weld of material to be welded is contacted with each other, by micro-plastic deformation or produce micro-liquid phase by face of weld and expand the physical contact of welding surface, interpenetrate through the continuous diffusion that the atom of long period is mutual again, realize a kind of welding method of metallurgy combination.Diffusion Welding pressure is less, and workpiece does not produce macroscopical plastic deformation, the precision parts that applicable postwelding is not reprocessed.Like this, high-pressure bellows postwelding weld joint occurs that the probability of crackle and defect reduces greatly, and postwelding occurs that the phenomenon that weldment is out of shape also greatly reduces.
High-pressure bellows can select the material of high strength, and it is in pressure test, can bear the pressure of 72MPa, and like this, the working life of high-pressure bellows has improves more significantly.
Compared with prior art, the maximum pressure grade that high-pressure bellows of the present utility model can reach is CL4500, and the maximum pressure grade that in prior art, bellows can reach is CL600, therefore, the voltage withstand class of high-pressure bellows of the present utility model obviously promotes.
On said structure basis, can also be provided with packing seal assembly 5 between valve rod 2 and valve gap body 1, packing seal assembly 5 is positioned at the top of described corrugated header.Packing seal assembly 5 can comprise filler, guide pipe and lining, and lining is sheathed on valve rod 2, and guide pipe is sheathed on lining, and filler is positioned at the below of lining and guide pipe.Like this, sealability of the present utility model is further increased.
Although the foregoing describe embodiment of the present utility model, it will be understood by those of skill in the art that this only illustrates, protection domain of the present utility model is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present utility model and essence, can make various changes or modifications to these mode of executions, but these change and amendment all falls into protection domain of the present utility model.
Claims (3)
1. one kind is provided with the valve cover portion sealing configuration of high-pressure bellows, it comprises a valve gap body, a valve rod and a high-pressure bellows, described high-pressure bellows and described valve rod are positioned at described valve gap body, described high-pressure bellows is sheathed on described valve rod, it is characterized in that, described valve rod is installed with a stepped part, the lower end of described high-pressure bellows is welded in described stepped part, the upper end of described high-pressure bellows is with the affixed corrugated header of welding manner, described valve rod is arranged in described corrugated header, described corrugated header and described valve gap body affixed.
2. be provided with the valve cover portion sealing configuration of high-pressure bellows as claimed in claim 1, it is characterized in that, be provided with a packing seal assembly between described valve rod and described valve gap body, described packing seal assembly is positioned at the top of described corrugated header.
3. be provided with the valve cover portion sealing configuration of high-pressure bellows as claimed in claim 2, it is characterized in that, described packing seal assembly comprises a filler, a guide pipe and a lining, described lining is sheathed on described valve rod, described guide pipe is sheathed on described lining, and described filler is positioned at the below of described lining and described guide pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420460248.1U CN204099713U (en) | 2014-08-14 | 2014-08-14 | Be provided with the valve cover portion sealing configuration of high-pressure bellows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420460248.1U CN204099713U (en) | 2014-08-14 | 2014-08-14 | Be provided with the valve cover portion sealing configuration of high-pressure bellows |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204099713U true CN204099713U (en) | 2015-01-14 |
Family
ID=52268143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420460248.1U Expired - Fee Related CN204099713U (en) | 2014-08-14 | 2014-08-14 | Be provided with the valve cover portion sealing configuration of high-pressure bellows |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204099713U (en) |
-
2014
- 2014-08-14 CN CN201420460248.1U patent/CN204099713U/en not_active Expired - Fee Related
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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: 20150114 Termination date: 20190814 |