CN202040347U - Seal ring backrest structure of soft seal butterfly valve - Google Patents
Seal ring backrest structure of soft seal butterfly valve Download PDFInfo
- Publication number
- CN202040347U CN202040347U CN2011201651891U CN201120165189U CN202040347U CN 202040347 U CN202040347 U CN 202040347U CN 2011201651891 U CN2011201651891 U CN 2011201651891U CN 201120165189 U CN201120165189 U CN 201120165189U CN 202040347 U CN202040347 U CN 202040347U
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- CN
- China
- Prior art keywords
- backrest
- rubber
- seal ring
- butterfly valve
- 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 - Fee Related
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- Sealing Devices (AREA)
Abstract
The utility model relates to a seal ring backrest structure of a soft seal butterfly valve, wherein the backrest is formed by upper and lower semi-annular pieces; a rubber seal ring is directly vulcanized and formed on the backrest; and an annular groove is arranged at the middle part on the inner side of the backrest. As the rubber seal ring is directly vulcanized and formed on the plastic hard backrest, the rubber is better supported and fixed; the annular groove arranged on the inner side of the backrest thickens the partial material of the squeezed part, so as to enable the squeezed and deformed rubber to have a bigger deformation stroke, further improve the sealing performance, ensure the stable sealing, and prolong the service life of the valve.
Description
Technical field
The utility model relates to valve field, especially a kind of seal ring backrest structure of soft sealing butterfly valve.
Background technique
Soft sealing butterfly valve obtains using very widely in fields such as oil, chemical industry, metallurgy, bio-pharmaceuticals, food and drink, water treatment, gas control as a kind of product that is 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.Soft sealing butterfly valve is meant that a side of sealing pair is a metallic material, and opposite side is resilient nonmetallic material; Compare and hard sealing structure, the sealability of soft seal is better.The rubber ring of the soft sealing butterfly valve of prior art directly is sleeved on the valve body usually, and this structure is easy to distortion when pressure state or valve plate switch, causes moment of torsion and sealing unstable, even accident may occur; And the inner ring surface of backrest is smooth cambered surface, therefore sheathed rubber at thickness direction uniformity all, the surface of contact attenuation easy to wear of on the one hand real performance seal action, the rubber elasticity deficiency of this part simultaneously, thereby influenced the reliability of sealability and butterfly valve.
The model utility content
The applicant is at the rubber ring means of fixation and the unreasonable structure of above-mentioned existing soft sealing butterfly valve, cause shortcomings such as poor sealing performance, reliability be low, a kind of seal ring backrest structure of soft sealing butterfly valve rational in infrastructure is provided, thereby can improves sealability and reliability greatly.
The technological scheme that the utility model adopted is as follows:
A kind of seal ring backrest structure of soft sealing butterfly valve, backrest is made up of semi-circular of two lobes up and down, and the direct sulfidization molding of rubber seal is provided with annular groove in the middle inside of backrest on backrest.
It is further characterized in that: the recessed degree of depth of described annular groove is 2～4mm.
The beneficial effects of the utility model are as follows:
The utility model adopts on the hard backrest of plastics directly sulfidization molding rubber seal, thereby rubber is better supported and fixing; Simultaneously be provided with annular groove, thickened the local material thickness at extruding position, make the rubber that is extruded distortion have bigger deformation stroke, guarantee stable sealing, improved the working life of valve thereby further improved sealability in the backrest inboard.
Description of drawings
Fig. 1 is a schematic isometric 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, rubber seal 2 direct sulfidization moldings of the present utility model are on the hard backrest 1 of plastics, backrest 1 is divided into two identical lobes up and down, this sulfidization molding is the structure of one, given better support and fixing of rubber, guaranteed that rubber is indeformable, thereby guaranteed stable sealing and moment of torsion.Be provided with annular groove 3 in the inboard of backrest 1, corresponding about recessed degree of depth 3mm, rubber seal 2 forms boss 4 corresponding to the position of backrest 1 groove 3, so rubber seal 2 is thicker at the material at middle part.This groove design is embedded in the groove 3 boss 4, can effectively be supported by groove both sides step after rubber is stressed, has further guaranteed the stability of rubber; Because the compression ratio of rubber material is fixed, so the thickening of local material also can make the rubber that is extruded distortion have bigger deformation stroke, thereby further improved sealability, and effectively improved the working life of rubber ring.
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.
Claims (2)
1. the seal ring backrest structure of a soft sealing butterfly valve is characterized in that: backrest is made up of semi-circular of two lobes up and down, and the direct sulfidization molding of rubber seal is provided with annular groove in the middle inside of backrest on backrest.
2. according to the seal ring backrest structure of the described soft sealing butterfly valve of claim 1, it is characterized in that: the recessed degree of depth of described annular groove is 2～4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201651891U CN202040347U (en) | 2011-05-23 | 2011-05-23 | Seal ring backrest structure of soft seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201651891U CN202040347U (en) | 2011-05-23 | 2011-05-23 | Seal ring backrest structure of soft seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202040347U true CN202040347U (en) | 2011-11-16 |
Family
ID=44967790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201651891U Expired - Fee Related CN202040347U (en) | 2011-05-23 | 2011-05-23 | Seal ring backrest structure of soft seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202040347U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363132A (en) * | 2013-07-23 | 2013-10-23 | 夏许超 | Processing method for synthetic rubber gum cover of butterfly valve |
| CN109312866A (en) * | 2016-06-17 | 2019-02-05 | 旭有机材株式会社 | Butterfly valve seat ring and butterfly valve with this seat ring |
-
2011
- 2011-05-23 CN CN2011201651891U patent/CN202040347U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363132A (en) * | 2013-07-23 | 2013-10-23 | 夏许超 | Processing method for synthetic rubber gum cover of butterfly valve |
| CN109312866A (en) * | 2016-06-17 | 2019-02-05 | 旭有机材株式会社 | Butterfly valve seat ring and butterfly valve with this seat ring |
| CN109312866B (en) * | 2016-06-17 | 2020-09-15 | 旭有机材株式会社 | Seat ring for butterfly valve and butterfly valve with seat ring |
| US10781925B2 (en) | 2016-06-17 | 2020-09-22 | Asahi Yukizai Corporation | Butterfly valve seat ring and butterfly valve provided with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20140523 |