CN202040349U - Valve shaft bushing structure of soft seal butterfly valve - Google Patents
Valve shaft bushing structure of soft seal butterfly valve Download PDFInfo
- Publication number
- CN202040349U CN202040349U CN2011201651285U CN201120165128U CN202040349U CN 202040349 U CN202040349 U CN 202040349U CN 2011201651285 U CN2011201651285 U CN 2011201651285U CN 201120165128 U CN201120165128 U CN 201120165128U CN 202040349 U CN202040349 U CN 202040349U
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- China
- Prior art keywords
- valve
- shaft
- valve shaft
- butterfly valve
- soft seal
- 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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Abstract
The utility model relates to a valve shaft bushing structure of a soft seal butterfly valve. A valve plate of the butterfly valve is provided with a revolving shaft hole; a lower valve shaft is tightly abutted through a bottom plug screw and is fixed together with a valve seat; the front end of the lower valve shaft is inserted into the revolving shaft hole of the valve plate; and a circular ring cylinder bushing is arranged between the lower valve shaft and the revolving shaft hole. According to the valve shaft bushing structure of the soft seal butterfly valve, the nylon bushing is arranged between the lower valve shaft and the revolving shaft hole, and the high temperature resistance property and the self-lubricating property of a nylon material are utilized, so that the valve plate is capable of smoothly deflect at a high speed to realize opening and closing; and simultaneously, the condition that adhesion is generated because the metal valve shaft and the metal valve plate are directly contact to generate friction to generate heat when doing a relative motion at the high speed is avoided. By adopting the valve shaft bushing structure of the soft seal butterfly valve, the working noise is greatly reduced, the abrasion of the valve shaft is reduced, and the service life of the butterfly valve is effectively prolonged. Compared with the service life of 4000-5000 times of the butterfly valve of the prior art, the service life of the valve shaft bushing structure of the soft seal butterfly valve can be prolonged to at least 20000 times.
Description
Technical field
The utility model relates to valve field, especially the valve shaft bush structure of soft sealing butterfly valve.
Background technique
Butterfly valve obtains using very widely in fields such as oil, chemical industry, metallurgy, water power as a kind of parts that are used for realizing pipe-line system break-make and flow control.The butterfly plate of butterfly valve is installed on the diametric(al) of pipeline.In the butterfly valve body cylindrical channel, the disc butterfly plate rotates around axis, and angle of swing is between 0 °～90 °, and when rotating to 90 °, valve is a full-gear.Adopt the pneumatic or electronic application that valve opening and closing is controlled of carrying out at some, the normal high speed that needs is opened closure, even reaches 100 switchings of per minute.The lower valve shaft of present butterfly valve is installed and is adopted dual mode usually, and a kind of mode is to follow valve plate to rotate together, and such structure wearing and tearing are very fast, make the gap between valve body and the valve shaft increasing, cause valve plate effectively not located, and also can cause leaking.Another kind of mode is that lower valve shaft is fixed on the valve seat, when valve plate rotates and the lower valve shaft repeated friction, under the situation of high speed relative movement, can generate heat, because valve plate and valve shaft all are metallic material, therefore under the condition of high temperature, can stick together, cause valve normally not open and close, even can suppress disconnected valve shaft, cause valve invalidation.
The model utility content
The applicant at above-mentioned existing soft sealing butterfly valve under the operating mode of high-speed opening and closing, lower valve shaft is easy to the valve plate friction and sticks together, cause shortcomings such as valve invalidation, a kind of valve shaft bush structure of soft sealing butterfly valve rational in infrastructure is provided, thereby can prevent that valve shaft and valve plate from sticking together, and effectively improves the reliability of valve.
The technological scheme that the utility model adopted is as follows:
A kind of valve shaft bush structure of soft sealing butterfly valve, the valve plate of butterfly valve is provided with rotary shaft hole, lower valve shaft pushes against by the bottom plug screw and fixes with valve seat, and the front end of lower valve shaft inserts in the rotary shaft hole of valve plate, is provided with the circle ring column lining between lower valve shaft and rotary shaft hole.
It is further characterized in that: described lining material is a nylon.
The beneficial effects of the utility model are as follows:
The utility model is provided with nylon lining between lower valve shaft and rotary shaft hole, utilize the resistance to high temperature and the self-lubricating property of nylon material, makes the valve plate realization of deflection smoothly keying at a high speed; Avoided the metal valve shaft directly to contact simultaneously, frictional heat takes place when the high speed relative movement and produced the situation of adhesion with the metal valve plate.The utility model greatly reduces operating noise, has reduced the wearing and tearing of valve shaft, has effectively prolonged the working life of butterfly valve, and than 4000～5000 times life-span of the butterfly valve of prior art, the utility model can extend to 20000 times at least.
Description of drawings
Fig. 1 is a decomposing state schematic representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.
As shown in Figure 1, the valve plate 3 of the utility model butterfly valve is provided with rotary shaft hole 4, lower valve shaft 2 pushes against by bottom plug screw 5 and fixes with valve seat 6, the front end of lower valve shaft 2 inserts in the rotary shaft hole 4 of valve plate 3, between lower valve shaft 2 and rotary shaft hole 4, be provided with nylon lining 1, lining 1 is a circle ring column, plays the lubricating bearings effect.Adopt interference fit between lining 1 and the valve plate, and be closely spaced transition fit between the lower valve shaft.
During real work, valve plate 3 high speed deflection under the driving of last valve shaft realizes opening and closing, because the nylon material of nylon lining 1 itself has certain self-lubricating function, simultaneously because the material of nylon and valve shaft, valve plate material are different, and has resistance to high temperature preferably, thereby can avoid the metal valve shaft directly to contact with the metal valve plate, frictional heat takes place when the high speed relative movement and produce the situation of adhesion.
More than describing is to explanation of the present utility model, is not the qualification to model utility, and the utility model institute restricted portion is referring to claim, and under the situation of the utility model spirit, the utility model can be done any type of modification.For example adopt other similar materials to substitute nylon and make lining.
Claims (2)
1. the valve shaft bush structure of a soft sealing butterfly valve, the valve plate of butterfly valve is provided with rotary shaft hole, lower valve shaft pushes against by the bottom plug screw and fixes with valve seat, and the front end of lower valve shaft inserts in the rotary shaft hole of valve plate, it is characterized in that: be provided with the circle ring column lining between lower valve shaft and rotary shaft hole.
2. according to the valve shaft bush structure of the described soft sealing butterfly valve of claim 1, it is characterized in that: described lining material is a nylon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201651285U CN202040349U (en) | 2011-05-23 | 2011-05-23 | Valve shaft bushing structure of soft seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201651285U CN202040349U (en) | 2011-05-23 | 2011-05-23 | Valve shaft bushing structure of soft seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202040349U true CN202040349U (en) | 2011-11-16 |
Family
ID=44967792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201651285U Expired - Lifetime CN202040349U (en) | 2011-05-23 | 2011-05-23 | Valve shaft bushing structure of soft seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202040349U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015597A (en) * | 2016-05-18 | 2016-10-12 | 中国北方发动机研究所(天津) | Low-driving-torque high-temperature valve bearing structure |
-
2011
- 2011-05-23 CN CN2011201651285U patent/CN202040349U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015597A (en) * | 2016-05-18 | 2016-10-12 | 中国北方发动机研究所(天津) | Low-driving-torque high-temperature valve bearing structure |
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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: 20111116 |