CN202719189U - Full metallic seal structure of valve seat and valve body - Google Patents
Full metallic seal structure of valve seat and valve body Download PDFInfo
- Publication number
- CN202719189U CN202719189U CN 201220415089 CN201220415089U CN202719189U CN 202719189 U CN202719189 U CN 202719189U CN 201220415089 CN201220415089 CN 201220415089 CN 201220415089 U CN201220415089 U CN 201220415089U CN 202719189 U CN202719189 U CN 202719189U
- Authority
- CN
- China
- Prior art keywords
- valve seat
- valve body
- valve
- bottom plane
- seat
- 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 full metallic seal structure of a valve seat and a valve body. The valve seat is fixed on a valve seat hole bottom plane of the valve body and achieves contact seal through a retainer ring, or the valve seat is fixed on the valve seat hole bottom plane of the valve body and achieves the contact seal through a pressing plate and a screw. The valve seat and valve body full metallic seal structure has the advantages that no leakage occurs under the condition of strong erosion of media or high temperature thermal expansion.
Description
Technical field
The utility model relates to a kind of sealing configuration, particularly a kind of valve seat and valve body all-metal sealing structure.
Background technique
Traditional metal hard-sealing ball valve valve seat and valve seal mainly adopt "O"-ring or graphite to realize sealing.Adopt the "O"-ring sealing mainly to be applicable to temperature 250 ℃ operating mode.Although in the operating mode more than 250 ℃, there are two problems applicable to temperature in the employing graphite grazing.The one, the sealing of valve seat and valve body is to realize radial seal by axial compression graphite, to the valve seat orifice of valve body and the exigent degree of finish of cooperation cylindrical of valve seat, is relatively more difficult but the valve seat orifice of valve body will reach very high degree of finish.The 2nd, the sealing of valve seat and valve body is a dynamic seal (packing), under the powerful erosion or high temperature thermal expansion situation of medium, often causes the loosening or excesssive gap of valve body and valve seat, finally causes valve leak.
The model utility content
Technical problem to be solved in the utility model is that the reliable valve seat of a kind of sealing and valve body all-metal sealing structure will be provided.
In order to solve above technical problem, the utility model provides a kind of valve seat and valve body all-metal sealing structure, described valve seat is fixed in bottom plane, valve body and valve seat hole by back-up ring and realizes the contact sealing, or valve seat is fixed in bottom plane, valve body and valve seat hole by pressing plate and screw and realizes contacting sealing.
Valve body arranges grinding wheel groove in the bottom plane in low pressure valve seat hole, is convenient to the bottom plane high-precision grinding.Pairing is ground after the bottom plane precision machining in the bottom plane of low pressure valve seat and valve body and valve seat hole, guarantees 100% contact.Low pressure valve seat is realized the contact sealing by the bottom plane that back-up ring is fixed on the valve body and valve seat hole.Under the effect of medium, promote spheroid to the low pressure valve seat axial motion, low pressure valve seat under the spheroid responsive to axial force with the valve seat orifice bottom plane close contact of valve body, realize in the powerful erosion of medium or high temperature thermal expansion situation, still guaranteeing " zero " leakage.
The maximum difference of high pressure seat and valve body all-metal sealing structure and low pressure valve seat and valve body all-metal sealing structure is the means of fixation of valve seat.High pressure seat is fixed on bottom plane, valve body and valve seat hole by pressing plate and screw and realizes contacting sealing.
Superior effect of the present utility model is:
1) in the powerful erosion of medium or high temperature thermal expansion situation, still guarantees " zero " leakage;
2) simple in structure, cost is low.
Description of drawings
Fig. 1 is low pressure valve seat of the present utility model and valve body all-metal sealing structural representation;
Fig. 2 is high pressure seat of the present utility model and valve body all-metal sealing structural representation;
The number in the figure explanation
1-valve body; 2-low pressure valve seat;
3-spheroid; 4-back-up ring;
5-pressing plate; 6-screw;
7-high pressure seat.
Embodiment
See also shown in the accompanying drawing, the utility model will be further described.
As shown in Figure 1, the utility model provides a kind of low pressure valve seat and valve body all-metal sealing structure, and low pressure valve seat 2 is fixed in valve body 1 valve seat orifice bottom plane by back-up ring 4 and realizes the contact sealing.Valve body 1 arranges grinding wheel groove in the bottom plane in low pressure valve seat 2 holes, is convenient to the bottom plane high-precision grinding.Pairing is ground after the bottom plane precision machining of the bottom plane of low pressure valve seat 1 and valve body 1 valve seat orifice, guarantees 100% contact.Low pressure valve seat 2 is realized the contact sealing by the bottom plane that back-up ring 4 is fixed on the valve body and valve seat hole.Under the effect of medium, promote spheroid 3 to low pressure valve seat 2 axial motions, low pressure valve seat 2 under spheroid 3 responsive to axial force with the valve seat orifice bottom plane close contact of valve body 1, realize in the powerful erosion of medium or high temperature thermal expansion situation, still guaranteeing " zero " leakage.
As shown in Figure 2, the utility model provides a kind of high pressure seat and valve body all-metal sealing structure, and high pressure seat 7 is fixed in bottom plane, valve body and valve seat hole by pressing plate 5 and screw 6 and realizes contacting sealing.Under the effect of medium, promote spheroid 3 to high pressure seat 7 axial motions, high pressure seat 7 under spheroid 3 responsive to axial force with the valve seat orifice bottom plane close contact of valve body 1, realize in the powerful erosion of medium or high temperature thermal expansion situation, still guaranteeing " zero " leakage.
Claims (1)
1. a valve seat and valve body all-metal sealing structure, it is characterized in that: described valve seat is fixed in bottom plane, valve body and valve seat hole by back-up ring and realizes the contact sealing, or valve seat is fixed in bottom plane, valve body and valve seat hole by pressing plate and screw and realizes contacting sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415089 CN202719189U (en) | 2012-08-21 | 2012-08-21 | Full metallic seal structure of valve seat and valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415089 CN202719189U (en) | 2012-08-21 | 2012-08-21 | Full metallic seal structure of valve seat and valve body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202719189U true CN202719189U (en) | 2013-02-06 |
Family
ID=47621013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220415089 Expired - Fee Related CN202719189U (en) | 2012-08-21 | 2012-08-21 | Full metallic seal structure of valve seat and valve body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202719189U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788170A (en) * | 2012-08-21 | 2012-11-21 | 上海开维喜阀门集团有限公司 | Valve seat and valve body all-metal sealing structure |
-
2012
- 2012-08-21 CN CN 201220415089 patent/CN202719189U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788170A (en) * | 2012-08-21 | 2012-11-21 | 上海开维喜阀门集团有限公司 | Valve seat and valve body all-metal sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201416 Shanghai city Fengxian District Zhelin Town Village Road No. 199 Patentee after: SHK VALVE GROUP CO., LTD. Address before: 201416 Shanghai city Fengxian District Zhelin Town Village Road No. 199 Patentee before: Shanghai SHK Valve Group Co., Ltd. |
|
| 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: 20130206 Termination date: 20170821 |