CN201053509Y - High pressure dual-seal butterfly valve - Google Patents
High pressure dual-seal butterfly valve Download PDFInfo
- Publication number
- CN201053509Y CN201053509Y CNU200720109884XU CN200720109884U CN201053509Y CN 201053509 Y CN201053509 Y CN 201053509Y CN U200720109884X U CNU200720109884X U CN U200720109884XU CN 200720109884 U CN200720109884 U CN 200720109884U CN 201053509 Y CN201053509 Y CN 201053509Y
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- CN
- China
- Prior art keywords
- sealing surface
- valve
- valve seat
- seat
- butterfly plate
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a high pressure double seal butterfly valve which comprises a valve body, a valve seat, a valve rod, a butterfly plate, a transmission mechanism, a sealing element and a mounting piece, wherein, the butterfly plate is fixed with the valve rod; the valve seat and the butterfly plate are respectively provided with a sealing surface, and the sealing surfaces match with each other; the sealing surface of the valve seat is of a double valve seat sealing surface structure which is mainly piled by a sealing surface of a metal valve seat and a sealing surface of a nonmetal valve seat; when the valve is closed, the sealing surface of the nonmetal valve seat is firstly contacted and sealed with the sealing surface of the butterfly plate in a matched manner, the sealing surface of the nonmetal valve seat is extruded by the sealing surface of the butterfly plate along with the increasing of pressure, so the sealing surface of the metal valve seat and the sealing surface of the nonmetal valve seat are sealed with the sealing surface of the butterfly plate in a matched manner at the same time. The utility model has the advantages of stable and reliable sealing property, attainability of zero leakage, high service pressure, etc. The utility model is applicable to the high pressure medium situation.
Description
Technical field
The utility model relates to a valve, particularly about a kind of butterfly valve.
Background technique
Butterfly valve because of simple in structure, open-close convenient, price is low is applied widely.Mainly be made up of valve body, valve rod, butterfly plate, driving mechanism, valve body is provided with the sealing surface of seat that cooperatively interacts with the butterfly plate sealing surface, and this sealing surface of seat has hard sealing and two kinds of structural types of soft seal.In order to reduce open and close torque, improve seal pressure, general three eccentric structures that adopt between the valve body of butterfly valve, valve rod, the butterfly plate.As publication number is the metallic sealing butterfly valve of CN1570434, structure mainly comprises valve body, valve seat, valve rod, valve plate, support, seal ring etc., the sealing surface of its valve plate and the rotating center of valve plate depart from, the rotating center of valve plate and the misalignment of valve body, the center and the valve plate rotating center of valve plate involute shape sealing surface depart from.Be so-called three eccentric butterfly valve, major advantage is that unlatching is laborsaving, reduces wear good seal performance.But, this three eccentric butterfly valve, working pressure is lower, is generally used in the low pressure operating mode, and along with the prolongation of service time, sealing surface can be frayed gradually, and sealability descends.
Summary of the invention
The purpose of this utility model is the shortcoming that exists at prior art, and a kind of working pressure height, the reliable and stable high pressure double seal butterfly valve of sealability are provided.
The technological scheme that realizes the utility model purpose comprises valve body, valve seat, valve rod, butterfly plate, driving mechanism, Sealing and assembling set, butterfly plate is fixedly connected on the valve rod, be shaped on the sealing surface that cooperatively interacts on valve seat and the butterfly plate respectively, it mainly is the dual sealing surface of seat structure that sealing surface of seat is made up of metal seat valve sealing surface and the stack of nonmetal valve seat sealing surface, described metal seat valve sealing surface on valve body pile-up welding hard alloy through being processed to form the sealing curved surface that cooperatively interacts with the butterfly plate sealing surface, described nonmetal valve seat sealing surface is the seal ring that rubber or plastic materials are made, and is installed between pressure ring and the metal seat valve.
In above technological scheme, nonmetal valve seat sealing surface protrudes from the metal seat valve sealing surface slightly.
Advantage of the present utility model is that sealing surface of seat forms double seal face structure by metal seat valve sealing surface and nonmetal valve seat sealing surface, at first seal during valve closing by nonmetal valve seat sealing surface and butterfly plate sealing surface contact matching, increase along with pressure, nonmetal valve seat sealing surface is subjected to the extruding of butterfly plate sealing surface, make butterfly plate sealing surface while and metal seat valve sealing surface and nonmetal valve seat sealing surface fitted seal, sealability is reliable and stable, can reach zero leakage, the working pressure height.
Description of drawings
Fig. 1 is a structure sectional view of the present utility model.
Embodiment
High pressure double seal butterfly valve as shown in Figure 1, comprise valve body 2, valve seat, valve rod 3, butterfly plate 5, driving mechanism 12, Sealing and assembling set, butterfly plate 5 is fixedly connected on the valve rod 3 by pin 4, be shaped on the sealing surface that cooperatively interacts respectively on valve seat and the butterfly plate 5, adopt three eccentric structures between valve body 2, valve rod 3, the butterfly plate 5.The dual sealing surface of seat structure that sealing surface of seat is made up of metal seat valve sealing surface 8 and 7 stacks of nonmetal valve seat sealing surface, this metal seat valve sealing surface 8 is a pile-up welding hard alloy on valve body 2, the sealing curved surface that cooperatively interacts through the sealing surface of fine finishing formation and butterfly plate 5, this nonmetal valve seat sealing surface 7 is the seal ring that rubber or plastic materials are made, be installed between pressure ring 6 and the metal seat valve, when valve closing, metal seat valve sealing surface 8 and nonmetal valve seat sealing surface 7 cooperate the formation double sealing structure simultaneously with the sealing surface of butterfly plate 5.This double sealing structure has anti-fire action, and promptly when nonmetal valve seat sealing surface 7 was burnt out, metal seat valve sealing surface 8 continued to keep sealing with butterfly plate 5.Nonmetal valve seat sealing surface 7 protrudes from metal seat valve sealing surface 8 slightly, in the valve closing process at first with the sealing of the sealing surface contact matching of butterfly plate 5.Stuffing box packing 9 is adopted in the sealing of going up between valve body 2 and the valve rod 3, and sealing filler 9 compresses installation by Gland 10, and valve body 2 lower ends compress the seal ring sealing by capping 1.Driving mechanism 12 is installed on the valve body 2 by support 11.
Claims (2)
1. high pressure double seal butterfly valve, comprise valve body (2), valve seat, valve rod (3), butterfly plate (5), driving mechanism (12), Sealing and assembling set, butterfly plate (5) is fixedly connected on the valve rod (3), valve seat and butterfly plate are shaped on the sealing surface that cooperatively interacts respectively on (5), it is characterized in that the dual sealing surface of seat structure that sealing surface of seat is made up of metal seat valve sealing surface (8) and nonmetal valve seat sealing surface (7) stack, described metal seat valve sealing surface (8) on valve body pile-up welding hard alloy through being processed to form the sealing curved surface that cooperatively interacts with the butterfly plate sealing surface, described nonmetal valve seat sealing surface (7) is the seal ring that rubber or plastic materials are made, and is installed between pressure ring (6) and the metal seat valve.
2. high pressure double seal butterfly valve according to claim 1 is characterized in that nonmetal valve seat sealing surface (7) protrudes from metal seat valve sealing surface (8) slightly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720109884XU CN201053509Y (en) | 2007-05-26 | 2007-05-26 | High pressure dual-seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720109884XU CN201053509Y (en) | 2007-05-26 | 2007-05-26 | High pressure dual-seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201053509Y true CN201053509Y (en) | 2008-04-30 |
Family
ID=39393172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720109884XU Expired - Fee Related CN201053509Y (en) | 2007-05-26 | 2007-05-26 | High pressure dual-seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201053509Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179495A (en) * | 2015-06-26 | 2015-12-23 | 江苏永钢集团有限公司 | Fixing device of main transmission shaft of spinning machine |
| CN112331978A (en) * | 2020-11-23 | 2021-02-05 | 中国电子科技集团公司第十八研究所 | High-pressure sealing structure for lead |
-
2007
- 2007-05-26 CN CNU200720109884XU patent/CN201053509Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179495A (en) * | 2015-06-26 | 2015-12-23 | 江苏永钢集团有限公司 | Fixing device of main transmission shaft of spinning machine |
| CN112331978A (en) * | 2020-11-23 | 2021-02-05 | 中国电子科技集团公司第十八研究所 | High-pressure sealing structure for lead |
| CN112331978B (en) * | 2020-11-23 | 2022-04-12 | 中国电子科技集团公司第十八研究所 | High-pressure sealing structure for lead |
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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: 20080430 Termination date: 20120526 |