CN108286615A - Compound sealing structure for ball valve - Google Patents
Compound sealing structure for ball valve Download PDFInfo
- Publication number
- CN108286615A CN108286615A CN201710012872.3A CN201710012872A CN108286615A CN 108286615 A CN108286615 A CN 108286615A CN 201710012872 A CN201710012872 A CN 201710012872A CN 108286615 A CN108286615 A CN 108286615A
- Authority
- CN
- China
- Prior art keywords
- face
- valve
- seat ring
- ring
- indent cavity
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 46
- 150000001875 compounds Chemical class 0.000 title claims abstract description 11
- 230000007547 defect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 241000009298 Trigla lyra Species 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
Abstract
The invention discloses a kind of compound sealing structures for ball valve, the seat ring of this structure is movably arranged at the input end of valve body valve chamber, spring is set between valve body valve chamber end face and seat ring rear end face, seat ring front end face is equipped with indent cavity, pressing plate is set to one end of seat ring front end face indent cavity, the seat ring front end face indent cavity other end contacts to form hard sealing pair with spherical valve core surface, soft seal ring is set in the indent cavity of seat ring front end face and both ends bear against indent cavity other end side wall and pressing plate side wall, soft seal ring contacts to form soft seal pair with spherical valve core surface, pressing plate end face forms another hard sealing pair with spherical valve core surface, seat ring is equipped with the channel of connection valve body valve chamber input end and indent cavity.This structure overcomes the defect of conventional ball valve sealing structure, and ball valve can be made to form soft or hard multi-sealed pair, keep the sealing of ball valve more reliable, and effectively improve the service life of ball valve.
Description
Technical field
The present invention relates to a kind of compound sealing structures for ball valve.
Background technology
Ball valve is widely used in the pipeline of various liquid fluid systems, the break-make for medium in control piper.It is conventional
Ball valve include mainly valve body, valve seat, spherical valve core and valve rod, valve seat is fixed in the valve chamber of valve body, and spherical valve core is set
In forming sealing pair in the valve chamber of valve body and with valve seat, valve rod connection spherical valve core simultaneously stretches out valve body, passes through valve rod rotary spherical
Spool realizes being turned on and off for ball valve.
In the sealing structure of conventional ball valve, it can be common that single sealing pair, such as soft sealing valve seat or hard seal valve seat,
There is the valve seat that a small number of soft and hard seals combine, but be typically all based on a kind of sealing supplemented by another sealing, and thereon soft
Sealing can not compensate automatically upon wear, and sealing effect and service life are affected.
Invention content
Technical problem to be solved by the invention is to provide a kind of compound sealing structure for ball valve, this structure overcomes
The defect of conventional ball valve sealing structure can make ball valve form soft or hard multi-sealed pair, keep the sealing of ball valve more reliable, and have
Effect improves the service life of ball valve.
In order to solve the above technical problems, compound sealing structure of the present invention for ball valve includes valve body and spherical valve core, institute
It states spherical valve core to be located in the valve chamber of the valve body, this structure further includes seat ring, spring, pressing plate and soft seal ring, the valve
Seat ring is movably arranged at the input end of the valve body valve chamber, the spring be set to valve body valve chamber end face and seat ring rear end face it
Between, the seat ring front end face is equipped with indent cavity, and the pressing plate is set to one end of the seat ring front end face indent cavity, institute
The seat ring front end face indent cavity other end is stated to contact to form hard sealing pair with the spherical valve core surface, the pressing plate end face with
Spherical valve core surface forms another hard sealing pair, and the soft seal ring is set in the indent cavity of the seat ring front end face
And both ends bear against the indent cavity other end side wall and pressing plate side wall, and the soft seal ring connects with spherical valve core surface
It touches and forms soft seal pair, the seat ring is equipped with the channel for being connected to the valve body valve chamber input end and indent cavity.
Further, this structure further includes the first O-ring seal and the second O-ring seal, and first O-ring seal is set to
Between the seat ring outer ring and valve body valve chamber inner ring, second O-ring seal is set to the pressing plate and seat ring front end face
Between.
Compound sealing structure due to the present invention for ball valve uses above-mentioned technical proposal, i.e. the seat ring activity of this structure is set
In the input end of valve body valve chamber, spring is set between valve body valve chamber end face and seat ring rear end face, and seat ring front end face is equipped with interior
Recessed cavity, pressing plate are set to one end of seat ring front end face indent cavity, the seat ring front end face indent cavity other end and globe valve
Wicking surface contacts to form hard sealing pair, in soft seal ring is set in the indent cavity of seat ring front end face and both ends bear against
Recessed cavity other end side wall and pressing plate side wall, soft seal ring contact to form soft seal pair with spherical valve core surface, pressing plate end face with
Spherical valve core surface forms another hard sealing pair.Seat ring is equipped with the logical of connection valve body valve chamber input end and indent cavity
Road.This structure overcomes the defect of conventional ball valve sealing structure, and ball valve can be made to form soft or hard multi-sealed pair, make the sealing of ball valve
It is more reliable, and effectively improve the service life of ball valve.
Description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is the compound sealing structure schematic diagram that the present invention is used for ball valve；
Fig. 2 is the enlarged diagram in the portions A in Fig. 1；
Fig. 3 is the ball valve open state schematic diagram using this structure.
Specific implementation mode
Embodiment is as depicted in figs. 1 and 2, and compound sealing structure of the present invention for ball valve includes valve body 1 and spherical valve core
2, the spherical valve core 2 is located in the valve chamber 11 of the valve body 1, this structure further includes seat ring 3, spring 4, pressing plate 5 and soft close
Seal 6, the seat ring 3 are movably arranged at the input end of the valve body valve chamber 11, and the spring 4 is set to 11 end of valve body valve chamber
Between 3 rear end face of face and seat ring, 3 front end face of the seat ring is equipped with indent cavity 31, and the pressing plate 5 is set to the seat ring
One end of 3 front end face indent cavitys 31,3 front end face indent cavity of the seat ring, 31 other end and 5 end face of pressing plate and the ball
2 surface of shape spool contacts to form two hard sealing pairs 21,22, and the soft seal ring 6 is set to the indent of 3 front end face of the seat ring
In cavity 31 and both ends bear against 31 other end side wall of the indent cavity and 5 side wall of pressing plate, and the indent cavity 31 is another
One end side wall and 5 side wall of pressing plate play the role of clamping to soft seal ring 6, and the soft seal ring 6 is contacted with 2 surface of spherical valve core
Soft seal pair 23 is formed, the seat ring 3 is equipped with the channel 32 for being connected to 11 input end of valve body valve chamber and indent cavity 31.
Preferably, this structure further includes the first O-ring seal 7 and the second O-ring seal 8, first O-ring seal 7
Between 11 inner ring of 3 outer ring of the seat ring and valve body valve chamber, second O-ring seal 8 is set to the pressing plate 5 and valve seat
It encloses between 3 front end faces.First O-ring seal avoids medium by valve body valve chamber for the sealing between seat ring and valve body valve chamber
Input end to outlet end leak；Second O-ring seal avoids seat ring front end face for the sealing between seat ring and pressing plate
The leakage of medium in indent cavity, it is ensured that medium has enough thrust to soft seal ring in indent cavity, improves soft seal pair
Sealing effect.
Seat ring forms piston effect in the input end of valve body valve chamber in this structure, by spring by seat ring top to spherical shape
Spool face so that the seat ring front end face indent cavity other end and pressing plate end face and spherical valve core surface reliable contacts and shape
At two hard sealing pairs；Meanwhile channel of the medium through being opened up on seat ring of valve body valve chamber input end enters seat ring front end face
Indent cavity in and pushing tow soft seal ring so that soft seal ring against spherical valve core surface formed soft seal pair, pressure medium
Bigger, then the sealing effect of soft seal pair is better.This structure constitutes ball valve by two hard sealing pairs and a soft seal pair
The soft and hard seal structure of complex form, and the respective advantage of soft and hard seal pair can be played, the better adaptability of medium is greatly improved
The sealing effect of ball valve；Simultaneously because soft seal ring relies on pressure medium pushing tow, unless soft seal ring is worn out, soft seal ring with
The sealing effect of soft seal pair is not influenced after spherical valve core contact wear, thus improves the service life of ball valve.
It is respectively closing and the open state schematic diagram using this structure ball valve, wherein spherical valve core as shown in figures 1 and 3
2 are rotated by valve rod 12, and three sealing pairs of this structure constitute sealing structure, the rotation of spherical valve core 2 to inner passage 24 and valve body
Ball valve is opened when the inlet end and an outlet end perforation of valve chamber 11, and otherwise ball valve is closed.It is close by three of this structure
Envelope pair keeps the sealing of ball valve more reliable, and effectively improves the service life of ball valve.
Claims (2)
1. a kind of compound sealing structure for ball valve, including valve body and spherical valve core, the spherical valve core is located at the valve body
Valve chamber in, it is characterised in that：This structure further includes seat ring, spring, pressing plate and soft seal ring, and the seat ring is movably arranged at
The input end of the valve body valve chamber, the spring are set between valve body valve chamber end face and seat ring rear end face, the valve seat
It encloses front end face and is equipped with indent cavity, the pressing plate is before one end of the seat ring front end face indent cavity, the seat ring
The end face indent cavity other end contacts to form hard sealing pair with the spherical valve core surface, the pressing plate end face and spherical valve core table
Face forms another hard sealing pair, and the soft seal ring is set in the indent cavity of the seat ring front end face and both ends point
Not against the indent cavity other end side wall and pressing plate side wall, the soft seal ring contacted with spherical valve core surface to be formed it is soft close
Envelope is secondary, and the seat ring is equipped with the channel for being connected to the valve body valve chamber input end and indent cavity.
2. the compound sealing structure according to claim 1 for ball valve, it is characterised in that：This structure further includes the first O
Type sealing ring and the second O-ring seal, first O-ring seal be set to the seat ring outer ring and valve body valve chamber inner ring it
Between, second O-ring seal is set between the pressing plate and seat ring front end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710012872.3A CN108286615A (en) | 2017-01-09 | 2017-01-09 | Compound sealing structure for ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710012872.3A CN108286615A (en) | 2017-01-09 | 2017-01-09 | Compound sealing structure for ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108286615A true CN108286615A (en) | 2018-07-17 |
Family
ID=62819170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710012872.3A Pending CN108286615A (en) | 2017-01-09 | 2017-01-09 | Compound sealing structure for ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108286615A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586754A (en) * | 2021-07-30 | 2021-11-02 | 清华大学 | Forced sealing valve seat |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB865788A (en) * | 1958-08-11 | 1961-04-19 | Neue Argus Gmbh | Spherical-plug cock having a piston-type packing ring displaceably mounted in the cock body |
| CN201687982U (en) * | 2010-06-10 | 2010-12-29 | 沃泰阀门(昆山)有限公司 | Hard and soft dual seal fixed ball valve |
| CN202927128U (en) * | 2012-10-15 | 2013-05-08 | 天津市滨海新区塘沽诚帆阀门厂 | Floating sleeve type combined sealing valve seat |
| CN205578773U (en) * | 2016-03-12 | 2016-09-14 | 宁波会德丰铜业有限公司 | Ball valve sealing structure |
| CN206539725U (en) * | 2017-01-09 | 2017-10-03 | 凯泰阀门(集团)有限公司 | Compound sealing structure for ball valve |
-
2017
- 2017-01-09 CN CN201710012872.3A patent/CN108286615A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB865788A (en) * | 1958-08-11 | 1961-04-19 | Neue Argus Gmbh | Spherical-plug cock having a piston-type packing ring displaceably mounted in the cock body |
| CN201687982U (en) * | 2010-06-10 | 2010-12-29 | 沃泰阀门(昆山)有限公司 | Hard and soft dual seal fixed ball valve |
| CN202927128U (en) * | 2012-10-15 | 2013-05-08 | 天津市滨海新区塘沽诚帆阀门厂 | Floating sleeve type combined sealing valve seat |
| CN205578773U (en) * | 2016-03-12 | 2016-09-14 | 宁波会德丰铜业有限公司 | Ball valve sealing structure |
| CN206539725U (en) * | 2017-01-09 | 2017-10-03 | 凯泰阀门(集团)有限公司 | Compound sealing structure for ball valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586754A (en) * | 2021-07-30 | 2021-11-02 | 清华大学 | Forced sealing valve seat |
| CN113586754B (en) * | 2021-07-30 | 2022-04-22 | 清华大学 | Forced sealing valve seat |
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