CN107631051A - A kind of double sealing structure for cryogenic ball valve valve seat - Google Patents
A kind of double sealing structure for cryogenic ball valve valve seat Download PDFInfo
- Publication number
- CN107631051A CN107631051A CN201710967211.6A CN201710967211A CN107631051A CN 107631051 A CN107631051 A CN 107631051A CN 201710967211 A CN201710967211 A CN 201710967211A CN 107631051 A CN107631051 A CN 107631051A
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- China
- Prior art keywords
- ring
- valve seat
- valve
- lip
- pressure
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- 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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Abstract
A kind of double sealing structure for cryogenic ball valve valve seat, including valve seat and valve body, sealing ring, pressure ring and preloading spring are provided between the valve seat and valve body, pressure ring compresses sealing ring, and preloading spring is squeezed on pressure ring；Lip-type packing, back-up ring and straight pin are provided between the valve seat and valve body, the back-up ring is against the left end of lip-type packing.The beneficial effects of the invention are as follows：First, first resealing use can resist sealing ring made of the wire folder flexible graphite material of certain pressure, the sealing ring is mutually extruded by pressure ring and valve seat, pressure ring is pressed on sealing ring under pressure medium effect, after sealing ring motion, mutual extruding force is produced with valve seat, makes sealing ring compression, reaches sealing effectiveness；Second, the second resealing uses lip-type packing at valve seat, and installation uses open groove structure, reaches sealing effectiveness by self-pressure-sealed, fixed back-up ring prevents lip-type packing to be moved.
Description
Technical field
The present invention relates to cryogenic ball valve technical field, and in particular to a kind of dual-seal knot for cryogenic ball valve valve seat
Structure.
Background technology
Low temperature hard seal ball valve is widely used in the chemical industries such as ethene, liquefied natural gas at present, due to the spy of environment
Different property requires harsher to valve, especially requires higher to the sealing property of valve, is not allow for leaking.Usual low temperature ball
Valve base and valve body only have a soft seal again, under prolonged cold environment, easily property of sealing piece is failed, valve leak occurs.
In view of operating mode particularity, the design of cryogenic ball valve valve base sealing is extremely important, ensures the zero leakage of valve base sealing.
The content of the invention
It is an object of the invention to provide a kind of double sealing structure for cryogenic ball valve valve seat is planted, to solve the above-mentioned back of the body
The problem of being proposed in scape technology.
To achieve the above object, the present invention provides following technical scheme：
A kind of double sealing structure for cryogenic ball valve valve seat, including valve seat and valve body, between the valve seat and valve body
Sealing ring, pressure ring and preloading spring are provided with, pressure ring compresses sealing ring, and preloading spring is squeezed on pressure ring；The valve seat and valve
Lip-type packing, back-up ring and straight pin are provided between body, the back-up ring is against the left end of lip-type packing, and back-up ring passes through cylinder
Pin is fixedly installed on valve seat, and the lip-type packing opening mounting surface is towards pressure medium direction.
It is as further scheme of the invention：The sealing ring is made up of wire folder flexible graphite material.
As the present invention, further scheme is：Differential seat angle be present in the mutual extruded parts of sealing ring and valve seat, its
Differential seat angle is 2 °.
As the present invention, further scheme is：The lip-type packing is backwards to spheroid direction.
The beneficial effects of the invention are as follows：
The first, the first resealing use can resist sealing ring made of the wire folder flexible graphite material of certain pressure,
The sealing ring is mutually extruded by pressure ring and valve seat, and pressure ring is pressed on sealing ring under pressure medium effect, sealing ring motion
Afterwards, mutual extruding force is produced with valve seat, makes sealing ring compression, reach sealing effectiveness；
Second, the second resealing uses lip-type packing at valve seat, and installation uses open groove structure, by self-pressure-sealed
Reach sealing effectiveness, fixed back-up ring prevents lip-type packing to be moved；
3rd, design structure of the present invention is fairly simple, processing step is few, design is light and handy, production cost is low, installation and maintenance
Also very simple.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is ring structure schematic diagram of the present invention；
Fig. 3 is lip-type packing of the present invention and installation direction structural representation.
In figure：1. spheroid；2. valve seat；3. valve body；4. sealing ring；5. pressure ring；6. preloading spring；7. lip-type packing；8.
Back-up ring；9. straight pin.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Refer to Fig. 1-Fig. 3, in the embodiment of the present invention, a kind of double sealing structure for cryogenic ball valve valve seat, including
Valve seat 2 and valve body 3, are provided with sealing ring 4, pressure ring 5 and preloading spring 6 between the valve seat 2 and valve body 3, pressure ring 5 compresses sealing
Circle 4, preloading spring 6 is squeezed on pressure ring 5, under medium power and the pretightning force collective effect of preloading spring 6, pressure ring 5 is pressed in close
In seal 4, promote sealing ring 4 to move, mutual extruding force is produced with valve seat 2, sealing ring 4 is mutually squeezed by pressure ring 5 and valve seat 2
Pressure, makes the compression of sealing ring 4, so as to reach valve seat 2 and the sealing effectiveness of valve body 3；
Lip-type packing 7, back-up ring 8 and straight pin 9 are provided between the valve seat 2 and valve body 3, the back-up ring 8 is against lip
The left end of shape sealing ring 7, back-up ring 8 are fixedly installed on valve seat 2 by straight pin 9, and the root of lip-type packing 7 first enters formula installation
(installation direction is that lip-type packing 7 is open to medium force direction), reach sealing effectiveness by self-pressure-sealed, back-up ring 8 is logical with valve seat 2
Cross straight pin 9 to be fixed together, to prevent lip-type packing 7 to be moved.
The sealing ring 4 is made up of wire folder flexible graphite material.
There is differential seat angle in the 2 mutual extruded parts of sealing ring 4 and valve seat, its differential seat angle is 2 °.
The lip-type packing 4 is backwards to the direction of spheroid 1.
The lip-type packing 4 is open mounting surface towards pressure medium direction.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (4)
1. a kind of double sealing structure for cryogenic ball valve valve seat, including valve seat and valve body, it is characterised in that the valve seat with
Sealing ring, pressure ring and preloading spring are provided between valve body, pressure ring compresses sealing ring, and preloading spring is squeezed on pressure ring；It is described
Lip-type packing, back-up ring and straight pin are provided between valve seat and valve body, the back-up ring is against the left end of lip-type packing, back-up ring
It is fixedly installed on by straight pin on valve seat, the lip-type packing opening mounting surface is towards pressure medium direction.
2. a kind of double sealing structure for cryogenic ball valve valve seat according to claim 1, it is characterised in that described close
Seal is made up of wire folder flexible graphite material.
A kind of 3. double sealing structure for cryogenic ball valve valve seat according to claim 1 or 2, it is characterised in that institute
State sealing ring and the mutual extruded parts of valve seat has differential seat angle, its differential seat angle is 2 °.
A kind of 4. double sealing structure for cryogenic ball valve valve seat according to claim 1, it is characterised in that the lip
Shape sealing ring is backwards to spheroid direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967211.6A CN107631051A (en) | 2017-10-17 | 2017-10-17 | A kind of double sealing structure for cryogenic ball valve valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967211.6A CN107631051A (en) | 2017-10-17 | 2017-10-17 | A kind of double sealing structure for cryogenic ball valve valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107631051A true CN107631051A (en) | 2018-01-26 |
Family
ID=61105621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710967211.6A Pending CN107631051A (en) | 2017-10-17 | 2017-10-17 | A kind of double sealing structure for cryogenic ball valve valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107631051A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810674A (en) * | 2022-06-30 | 2022-07-29 | 四川绵竹川润化工有限公司 | Sealed liquid ammonia pump for liquid ammonia transportation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4345738A (en) * | 1980-08-25 | 1982-08-24 | Grove Valve And Regulator Company | Fire safe seal |
| US4511150A (en) * | 1982-06-07 | 1985-04-16 | Societe Nouvelle Auxim (Societe Anonyme) | Device providing an effective seal for a spherical rotary slide valve |
| CN202402694U (en) * | 2011-12-02 | 2012-08-29 | 自贡高压阀门股份有限公司 | Hard sealing ball valve seat sealing device suitable for high temperature |
| CN203560507U (en) * | 2013-11-21 | 2014-04-23 | 盐城圣科球阀有限公司 | Novel quadruple-combined sealing pipeline ball valve seat |
| CN203670870U (en) * | 2014-01-03 | 2014-06-25 | 浙江中德自控科技股份有限公司 | Combined material high-temperature and high-pressure slagging ball valve |
| CN207454820U (en) * | 2017-10-17 | 2018-06-05 | 兰州高压阀门有限公司 | A kind of double sealing structure for cryogenic ball valve valve seat |
-
2017
- 2017-10-17 CN CN201710967211.6A patent/CN107631051A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4345738A (en) * | 1980-08-25 | 1982-08-24 | Grove Valve And Regulator Company | Fire safe seal |
| US4511150A (en) * | 1982-06-07 | 1985-04-16 | Societe Nouvelle Auxim (Societe Anonyme) | Device providing an effective seal for a spherical rotary slide valve |
| CN202402694U (en) * | 2011-12-02 | 2012-08-29 | 自贡高压阀门股份有限公司 | Hard sealing ball valve seat sealing device suitable for high temperature |
| CN203560507U (en) * | 2013-11-21 | 2014-04-23 | 盐城圣科球阀有限公司 | Novel quadruple-combined sealing pipeline ball valve seat |
| CN203670870U (en) * | 2014-01-03 | 2014-06-25 | 浙江中德自控科技股份有限公司 | Combined material high-temperature and high-pressure slagging ball valve |
| CN207454820U (en) * | 2017-10-17 | 2018-06-05 | 兰州高压阀门有限公司 | A kind of double sealing structure for cryogenic ball valve valve seat |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810674A (en) * | 2022-06-30 | 2022-07-29 | 四川绵竹川润化工有限公司 | Sealed liquid ammonia pump for liquid ammonia transportation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180126 |