CN206268552U - The secondary seal structure of middle flange - Google Patents
The secondary seal structure of middle flange Download PDFInfo
- Publication number
- CN206268552U CN206268552U CN201621405788.5U CN201621405788U CN206268552U CN 206268552 U CN206268552 U CN 206268552U CN 201621405788 U CN201621405788 U CN 201621405788U CN 206268552 U CN206268552 U CN 206268552U
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- CN
- China
- Prior art keywords
- valve body
- wound gasket
- metal wound
- bonnet
- valve
- 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.)
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- Lift Valve (AREA)
Abstract
A kind of secondary seal structure of middle flange, including valve body, are provided with bonnet on valve body, metal wound gasket is provided between valve body and bonnet, metal wound gasket is arranged on valve body, has inner face on the valve body on the inside of metal wound gasket, and the inner face forms hard sealing with bonnet inner side plane.The utility model has the advantages that：Protect the erosion of the not straight accepting medium of metal wound gasket; so as to improve the sealing property and service life of valve; metal wound gasket is directly embedded into the groove of valve body; metal wound gasket will not be caused in valve is assembled and reprocesses disassembly process damage; greatly reduce the loss of metal wound gasket; suitable for bad working environments such as HTHPs, the disposable qualification rate of valve pressure test is greatly improved.
Description
Technical field
The utility model is related to valve technology field, more particularly to a kind of secondary seal structure of middle flange.
Background technology
At present, valve body and bonnet are to be formed to seal by compressed metal wound gasket in valve, and the place of body lid connection only has
Seal together, and metal wound gasket is directly contacted with medium, under the operating mode of HTHP, is susceptible to let out for a long time by erosion
Leakage；Metal wound gasket is easily damaged in valve reprocesses disassembly process.
Utility model content
The utility model will solve the problems, such as above-mentioned prior art, there is provided a kind of secondary seal structure of middle flange,
The flimsy problem of current metal wound gasket is solved, the use demand of valve is met.
The utility model solves the technical scheme of its technical problem use：The secondary seal structure of this middle flange, including
Valve body, is provided with bonnet on valve body, metal wound gasket is provided between valve body and bonnet, and metal wound gasket is arranged on valve body,
There is inner face, the inner face forms hard sealing with bonnet inner side plane on valve body on the inside of metal wound gasket.
There is groove, metal wound gasket is arranged in groove on valve body.
Valve body is connected by bolt with bonnet.
The utility model has the advantages that：The secondary seal structure of middle flange of the present utility model, rational in infrastructure, valve body
Inner face forms hard sealing with bonnet inner side plane, realizes the primary seal of metal to metal, then by the close of metal wound gasket
Envelope, forms secondary seal, realizes effect of two-stage sealing, has the following advantages：
First, the erosion of the not straight accepting medium of metal wound gasket is protected, so as to improve the sealing property of valve and use the longevity
Life；
2nd, metal wound gasket is directly embedded into the groove of valve body, will not be right in valve is assembled and reprocesses disassembly process
Metal wound gasket causes to damage, and greatly reduces the loss of metal wound gasket；
3rd, suitable for bad working environments such as HTHPs；
4th, the disposable qualification rate of valve pressure test is greatly improved.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment.
Description of reference numerals：Valve body 1, bonnet 2, metal wound gasket 3, inner face 4, groove 5, bolt 6.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
Referring to the drawings：The secondary seal structure of this middle flange in the present embodiment, including valve body 1, are provided with valve body 1
Bonnet 2, is provided with metal wound gasket 3 between valve body 1 and bonnet 2, metal wound gasket 3 is arranged on valve body 1, metal wound gasket 3
There is inner face 4, the inner face 4 forms hard sealing with the inner side plane of bonnet 2 on the valve body 1 of inner side.
There is groove 5, metal wound gasket 3 is arranged in groove 5 on valve body 1.
Valve body 1 is connected by bolt 6 with bonnet 2.
The inner face 4 of valve body 1 is the plane for being located at the inner of valve body 1, and the inner face 4 is very stiff and demanding with the inner side plane of bonnet 2 to be connect
Touch, form the hard sealing of metal to metal, form primary seal, then metal wound gasket 3 forms secondary seal, so that real
Show two-stage sealing, first passed through primary seal and sealed, then sealed by secondary seal, improve sealing property.
Through actual tests, 2 " Q41H-900LB forged steel floating high-temperature hard sealing ball valves, design temperature -29~400 DEG C, housing
Materials A 105.According to MESC SPE 77/300-2012《Industrial valve pattern acceptance test (TAT) program and technical specification》With
ASMEB16.34-2013《Flange, screw thread and weldering connecting valve》The requirement of the 1.1st group of rated value of material of middle 2-1.1 is tried
Test.Experiment is proved, valve is tested by medium of helium, hunted leak by the way of helium mass spectrometer leak detector, in normal temperature, 200
Be down to micro- leakage test of normal temperature after DEG C high temperature, 400 DEG C of high temperature and high temperature, the valve body of valve and bonnet junction and valve body with
C.8 the micro- leakage grade of valve body/bonnet is tested to lengthen table during stuffing-box junction leakage rate is satisfied by MESC SPE 77/300-2012
Receive the requirement of criterion.
The characteristics of the utility model embodiment is：
First, the erosion of the not straight accepting medium of metal wound gasket 3 is protected, so as to improve the sealing property of valve and use the longevity
Life；
2nd, metal wound gasket 3 is directly embedded into the groove 5 of valve body 1, will not in valve is assembled and reprocesses disassembly process
Metal wound gasket 3 is caused to damage, the loss of metal wound gasket 3 is greatly reduced；
3rd, suitable for bad working environments such as HTHPs；
4th, the disposable qualification rate of valve pressure test is greatly improved.
Although the utility model is shown and described by reference to preferred embodiment, this specialty is common
Technical staff is it is to be appreciated that in the range of claims, can make the various change in form and details.
Claims (3)
1. a kind of secondary seal structure of middle flange, it is characterised in that：Including valve body (1), bonnet is provided with the valve body (1)
(2) metal wound gasket (3), is provided between the valve body (1) and bonnet (2), the metal wound gasket (3) is installed in valve body
(1) on, there is inner face (4), the inner face (4) and bonnet (2) inner side on the valve body (1) on the inside of the metal wound gasket (3)
Plane forms hard sealing.
2. the secondary seal structure of middle flange according to claim 1, it is characterised in that：Have on the valve body (1) recessed
Groove (5), the metal wound gasket (3) is arranged in groove (5).
3. the secondary seal structure of middle flange according to claim 1, it is characterised in that：The valve body (1) is by bolt
(6) it is connected with bonnet (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621405788.5U CN206268552U (en) | 2016-12-20 | 2016-12-20 | The secondary seal structure of middle flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621405788.5U CN206268552U (en) | 2016-12-20 | 2016-12-20 | The secondary seal structure of middle flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206268552U true CN206268552U (en) | 2017-06-20 |
Family
ID=59047247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621405788.5U Active CN206268552U (en) | 2016-12-20 | 2016-12-20 | The secondary seal structure of middle flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206268552U (en) |
-
2016
- 2016-12-20 CN CN201621405788.5U patent/CN206268552U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Zhejiang Province, Lishui City Industrial Park 323000 blocks Bi Xing Street No. 815 Patentee after: Valve Biwei Valve Co., Ltd Address before: Zhejiang Province, Lishui City Industrial Park 323000 blocks Bi Xing Street No. 815 Patentee before: ZHEJIANG FABIWEI VALVE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |