CN203686338U - Novel anti-torsion structure of corrugated pipe - Google Patents
Novel anti-torsion structure of corrugated pipe Download PDFInfo
- Publication number
- CN203686338U CN203686338U CN201320738960.9U CN201320738960U CN203686338U CN 203686338 U CN203686338 U CN 203686338U CN 201320738960 U CN201320738960 U CN 201320738960U CN 203686338 U CN203686338 U CN 203686338U
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- CN
- China
- Prior art keywords
- corrugated pipe
- bellows
- valve
- valve rod
- supporting sleeve
- 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 - Lifetime
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- 238000003466 welding Methods 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
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Abstract
The utility model relates to a novel anti-torsion structure of a corrugated pipe. The novel anti-torsion structure comprises a supporting sleeve, the corrugated pipe, a valve rod and an adapter ring, wherein one end of the corrugated pipe is connected with the adapter ring; the other end of the corrugated pipe is connected with the supporting sleeve; the adapter ring and the supporting sleeve form a corrugated pipe assembly together with the corrugated pipe through welding; the valve rod passes through the inner bore of the corrugated pipe assembly and is fixedly welded to the adapter ring; a specific welding position is decided according to the travel of a valve and the mounting position of the corrugated pipe. The whole anti-torsion structure provided by the utility model is simple and convenient to process; the cost is reduced, and the efficiency is improved; the anti-torsion strength is far higher than the anti-torsion strength generated by simply utilizing a key and a keyway; meanwhile, the phenomenon that the overall strength of the valve rod is reduced due to the fact that the keyway is processed can be avoided by the outer flat structure of the valve rod; the phenomenon that the valve is stuck due to the thermal deformation, caused by high temperature, of the fit clearance of the key and the keyway is avoided, so that the condition that the valve cannot normally work due to the fact that the key falls off to cause valve sticking during the working process of the valve is avoided.
Description
Technical field
The utility model relates to a kind of rotation prevention structure, the anti-torsion Novel anti-rotation of especially a kind of bellows structure.
Background technique
Use bellows as the valve of valve stem seal element, it is usually used in the occasion of the rare special medias such as severe toxicity, volatile, severe corrosive, as the occasion for high vacuum and nuclear industry.Adopt bellows auxiliary packing sealing, can thoroughly eliminate the possibility that processing medium leaks outside, this is one of distinguishing feature of bellow sealed valve.Bellows stretches with the lifting of valve rod, and its Maximum operating pressure depends on compressive strength and the fatigue strength of bellows.
A kind of rotary shell that bellows is made up of a series of toroidal shells, its axial rigidity and flexural rigidity are little, and torsional stiffness is large.The size of bellows torsional stiffness is relevant with wave number, thickness, wave height and ripple root outer diameter.
High speed medium can produce rotating force to spool at body cavity, can cause that bellows reverses, and easily causes bellows to damage, and therefore bellows uses and must be provided with anti-torsion structure.
Conventional rotation prevention structure adopts key anti-rotation, the more difficult control in gap of key and guide sleeve, and temperature is very easily stuck compared with Gao Shijian, when temperature is not high, again because gap causes key more loose, easily comes off.
Summary of the invention
The purpose of this utility model is to overcome the deficiency existing in conventional art, provides a kind of and can guarantee bellows operation steady in a long-term, extension fixture repair cycle, the anti-torsion Novel anti-rotation of the bellows structure of increasing work efficiency.
The technological scheme providing according to the utility model, the anti-torsion Novel anti-rotation of described bellows structure, comprise supporting sleeve, bellows, valve rod and connecting ring, one end of described bellows is connected with connecting ring, the other end connects supporting sleeve, described connecting ring and supporting sleeve are by welding and bellows composition bellows component, and together with described valve rod is welded and fixed with connecting ring through bellows component endoporus, concrete welding position is to determine according to the mounting point of the stroke of valve and bellows.
As further improvement of the utility model, it is outer flat-shaped that described valve rod Excircle machining becomes, and described supporting sleeve endoporus is processed into interior flat-shaped, has rational size gap between the two.
As further improvement of the utility model, described supporting sleeve, bellows, connecting ring are integral type.
Compared with the prior art the utility model has the following advantages:
1, whole rotation prevention structure is simple, easy to process, has saved cost, has improved efficiency;
2, utilize the interior flat cooperation of the outer flat and supporting sleeve endoporus of valve rod cylindrical can play the effect of anti-torsion, this anti-torsional strength is far longer than the simple anti-torsional strength of utilizing key and keyway, and the outer flat structure of valve rod can be avoided because being processed into keyway, valve rod bulk strength being reduced simultaneously;
3, in the utility model, there is no key, avoided stuck because high temperature causes the matching gap generation thermal distortion of key and keyway (supporting sleeve); Also avoid on the other hand key and keyway (supporting sleeve) excesssive gap, make valve in the course of the work key come off, cause stuckly, valve cannot normally be worked.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is A-A partial sectional view of Fig. 1.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
As shown in the figure, the anti-torsion Novel anti-rotation of bellows structure, comprise supporting sleeve 1, bellows 2, valve rod 3 and connecting ring 4, connecting ring 4 in one end, two of bellows 2, the other end is supporting sleeve 1, connecting ring 4 and supporting sleeve 1 form bellows component by welding and bellows 2, and together with valve rod 3 is welded and fixed with connecting ring 4 through bellows component endoporus, concrete welding position is to determine according to the mounting point of the stroke of valve and bellows.
Described valve rod 3 Excircle machinings become outer flat-shaped, and described supporting sleeve 1 endoporus is processed into interior flat-shaped, is provided with gap between the two.Described supporting sleeve 1, bellows 2, connecting ring are made as integral type.
Owing to there being flat larger dimensional fits in the outer flat and supporting sleeve of valve rod can ensure that valve rod is smoothly through bellows component endoporus, and not stuck, outer flat and interior flat combination simultaneously can be played again the effect of the anti-torsion of bellows; Compared with large size gap can avoid valve rod 3 in the environment of high temperature because thermal distortion causes moving bite at valve rod 3, even stuck.
Working principle of the present utility model is as follows:
Supporting sleeve 1 is fixedly mounted on whole bellows component in upper cover, valve rod 3 and the connecting ring 4 of bellows component is welded together simultaneously, and valve rod is through together with must being welded and fixed with connecting ring after bellows component endoporus.Bellows component utilizes the elastic telescopic performance of bellows 2, can carry out knee-action with valve rod 3.
The utility model adopts the mounting type of bellows formal dress, and bellows bears external pressure, is more conducive to bellows pressure-bearing, and connecting ring 4 is welded with valve rod 3, and supporting sleeve 1 and upper cover gasket seal ensure that medium can not enter bellows inner chamber, can carry out auxiliary seal to filler.
Claims (3)
1. the anti-torsion Novel anti-rotation of a bellows structure, it is characterized in that: comprise supporting sleeve (1), bellows (2), valve rod (3) and connecting ring (4), one end of described bellows (2) is connected with connecting ring (4), the other end connects supporting sleeve (1), described connecting ring (4) and supporting sleeve (1) are by welding and bellows (2) composition bellows component, and described valve rod (3) is welded and fixed through bellows component endoporus and connecting ring (4).
2. the anti-torsion Novel anti-rotation of bellows as claimed in claim 1 structure, is characterized in that: described valve rod (3) Excircle machining becomes outer flat-shaped, and described supporting sleeve (1) endoporus is processed into interior flat-shaped, is provided with gap between the two.
3. the anti-torsion Novel anti-rotation of bellows as claimed in claim 1 structure, is characterized in that: described in
Supporting sleeve (1), bellows (2), connecting ring (4) are made as integral type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320738960.9U CN203686338U (en) | 2013-11-20 | 2013-11-20 | Novel anti-torsion structure of corrugated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320738960.9U CN203686338U (en) | 2013-11-20 | 2013-11-20 | Novel anti-torsion structure of corrugated pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203686338U true CN203686338U (en) | 2014-07-02 |
Family
ID=51008237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320738960.9U Expired - Lifetime CN203686338U (en) | 2013-11-20 | 2013-11-20 | Novel anti-torsion structure of corrugated pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203686338U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591372A (en) * | 2013-11-20 | 2014-02-19 | 无锡智能自控工程股份有限公司 | Corrugated pipe anti-torsion novel anti-rotation structure |
| CN105697865A (en) * | 2014-11-24 | 2016-06-22 | 天津二十冶建设有限公司 | Rapid on-site adjustment method for angular travel execution mechanism valve |
-
2013
- 2013-11-20 CN CN201320738960.9U patent/CN203686338U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591372A (en) * | 2013-11-20 | 2014-02-19 | 无锡智能自控工程股份有限公司 | Corrugated pipe anti-torsion novel anti-rotation structure |
| CN105697865A (en) * | 2014-11-24 | 2016-06-22 | 天津二十冶建设有限公司 | Rapid on-site adjustment method for angular travel execution mechanism valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |