CN206539725U - Compound sealing structure for ball valve - Google Patents
Compound sealing structure for ball valve Download PDFInfo
- Publication number
- CN206539725U CN206539725U CN201720019399.7U CN201720019399U CN206539725U CN 206539725 U CN206539725 U CN 206539725U CN 201720019399 U CN201720019399 U CN 201720019399U CN 206539725 U CN206539725 U CN 206539725U
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- China
- Prior art keywords
- valve
- face
- seat ring
- indent cavity
- pressing plate
- 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
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
- 238000010586 diagram Methods 0.000 description 4
- 241000009298 Trigla lyra Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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Abstract
The utility model discloses a kind of compound sealing structure for ball valve, the seat ring of this structure is movably arranged at the entrance point of valve body valve pocket, spring is located between valve body valve pocket end face and seat ring rear end face, seat ring front end face is provided with indent cavity, pressing plate is located at 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 circle is in the indent cavity of seat ring front end face and two ends bear against indent cavity another side wall and pressing plate side wall, soft seal circle 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 communicated with the passage of valve body valve pocket entrance point 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, make the sealing of ball valve more reliable, and effectively improve the service life of ball valve.
Description
Technical field
The utility model is related to a kind of compound sealing structure 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 mainly include valve body, valve seat, spherical valve core and valve rod, valve seat is fixed in the valve pocket of valve body, and spherical valve core is set
In forming sealing pair in the valve pocket of valve body and with valve seat, valve rod connection spherical valve core simultaneously stretches out valve body, passes through valve rod rotary spherical
Valve element 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 a valve seat that a small number of soft and hard seals are combined, but be typically all based on one kind sealing supplemented by another sealing, and thereon soft
Sealing can not be compensated automatically upon wear, and sealing effectiveness and service life are affected.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of compound sealing structure for ball valve, this structure gram
The defect of conventional ball valve sealing structure has been taken, ball valve can be made to form soft or hard multi-sealed pair, make the sealing of ball valve more reliable, and
And effectively improve the service life of ball valve.
In order to solve the above technical problems, the compound sealing structure that the utility model is used for ball valve includes valve body and globe valve
Core, the spherical valve core is located in the valve pocket of the valve body, and this structure also includes seat ring, spring, pressing plate and soft seal circle, institute
The entrance point that seat ring is movably arranged at the valve body valve pocket is stated, the spring is located at the valve body valve pocket end face and seat ring rear end
Between face, the seat ring front end face is provided with indent cavity, and the pressing plate is located at the one of the seat ring front end face indent cavity
End, the seat ring front end face indent cavity other end contacts to form hard sealing pair with the spherical valve core surface, the pressing plate
End face forms another hard sealing pair with spherical valve core surface, and the soft seal circle is located at the indent of the seat ring front end face
Cavity is interior and two ends bear against the indent cavity another side wall and pressing plate side wall, the soft seal circle and spherical valve core
Surface contacts to form soft seal pair, and the seat ring is communicated with the passage of the valve body valve pocket entrance point and indent cavity.
Further, this structure also includes the first O-ring seal and the second O-ring seal, and first O-ring seal is located at
Between the seat ring outer ring and valve body valve pocket inner ring, second O-ring seal is located at the pressing plate and seat ring front end face
Between.
Because the compound sealing structure that the utility model is used for ball valve employs the valve seat of above-mentioned technical proposal, i.e. this structure
Circle is movably arranged at the entrance point of valve body valve pocket, and spring is located between valve body valve pocket end face and seat ring rear end face, seat ring front end
Face is provided with indent cavity, and pressing plate is located at one end of seat ring front end face indent cavity, the seat ring front end face indent cavity other end
Contact to form hard sealing pair with spherical valve core surface, soft seal circle is in the indent cavity of seat ring front end face and two ends are divided
Not against indent cavity another side wall and pressing plate side wall, soft seal circle is contacted with spherical valve core surface to form soft seal pair, pressure
Plate end face forms another hard sealing pair with spherical valve core surface.It is empty with indent that seat ring is communicated with valve body valve pocket entrance point
The passage of chamber.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 ball valve
Sealing it is more reliable, and effectively improve the service life of ball valve.
Brief description of the drawings
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is that the utility model is used for the compound sealing structure schematic diagram of ball valve；
Fig. 2 is the enlarged diagram in A portions in Fig. 1；
Fig. 3 is the ball valve opening schematic diagram using this structure.
Embodiment
As depicted in figs. 1 and 2, the compound sealing structure that the utility model is used for ball valve includes valve body 1 and spherical to embodiment
Valve element 2, the spherical valve core 2 is located in the valve pocket 11 of the valve body 1, and this structure also includes seat ring 3, spring 4, the and of pressing plate 5
Soft seal circle 6, the seat ring 3 is movably arranged at the entrance point of the valve body valve pocket 11, and the spring 4 is located at the valve body valve pocket
Between 11 end faces and the rear end face of seat ring 3, the front end face of seat ring 3 is provided with indent cavity 31, and the pressing plate 5 is located at the valve
One end of the front end face indent cavity 31 of seat ring 3, the other end of 3 front end face indent cavity of seat ring 31 and the end face of pressing plate 5 and institute
State the surface of spherical valve core 2 to contact to form two hard sealing pairs 21,22, the soft seal circle 6 is located at the front end face of seat ring 3
Indent cavity 31 is interior and two ends bear against the another side wall of indent cavity 31 and the side wall of pressing plate 5, the indent cavity
31 another side walls and the side wall of pressing plate 5 play a part of clamping, the soft seal circle 6 and the surface of spherical valve core 2 to soft seal circle 6
Contact forms soft seal pair 23, and the seat ring 3 is communicated with the passage of the entrance point of valve body valve pocket 11 and indent cavity 31
32。
It is preferred that, this structure also includes the first O-ring seal 7 and the second O-ring seal 8, first O-ring seal 7
Between the outer ring of seat ring 3 and the inner ring of valve body valve pocket 11, second O-ring seal 8 is located at the pressing plate 5 and valve seat
Enclose between 3 front end faces.The sealing that first O-ring seal is used between seat ring and valve body valve pocket, it is to avoid medium is by valve body valve pocket
Entrance point leaked to the port of export；The sealing that second O-ring seal is used between seat ring and pressing plate, it is to avoid seat ring front end face
The leakage of medium in indent cavity, it is ensured that medium has enough thrust to soft seal circle in indent cavity, improves soft seal pair
Sealing effectiveness.
In this structure seat ring valve body valve pocket entrance point formation piston effect, by spring by seat ring top to spherical
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
Into two hard sealing pairs；Meanwhile, passage of the medium through being opened up on seat ring of valve body valve pocket entrance point enters seat ring front end face
Indent cavity in and pushing tow soft seal circle so that soft seal circle against spherical valve core surface formed soft seal pair, pressure medium
Bigger, then the secondary sealing effectiveness of soft seal 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 secondary respective advantage of soft and hard seal can be played, the better adaptability of medium is greatly improved
The sealing effectiveness of ball valve；Simultaneously because soft seal circle relies on pressure medium pushing tow, unless soft seal circle is worn out, soft seal circle with
The sealing effectiveness for not influenceing soft seal secondary after spherical valve core contact wear, thus improve the service life of ball valve.
It is respectively closing and the opening 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, and spherical valve core 2 is rotated to inner passage 24 and valve body
Ball valve is opened when the entrance point of valve pocket 11 and port of export insertion, and otherwise ball valve is closed.It is close by three of this structure
Envelope pair makes 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 are located at the valve body
Valve pocket in, it is characterised in that：This structure also includes seat ring, spring, pressing plate and soft seal circle, and the seat ring is movably arranged at
The entrance point of the valve body valve pocket, the spring is located between the valve body valve pocket end face and seat ring rear end face, the valve seat
Enclose front end face and be provided with indent cavity, the pressing plate is located at 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 circle is in the indent cavity of the seat ring front end face and two ends are divided
Not against the indent cavity another side wall and pressing plate side wall, the soft seal circle contacts to form soft close with spherical valve core surface
Envelope is secondary, and the seat ring is communicated with the passage of the valve body valve pocket entrance point and indent cavity.
2. the compound sealing structure according to claim 1 for ball valve, it is characterised in that：This structure also includes the first O
Type sealing ring and the second O-ring seal, first O-ring seal located at the seat ring outer ring and valve body valve pocket inner ring it
Between, second O-ring seal is located between the pressing plate and seat ring front end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720019399.7U CN206539725U (en) | 2017-01-09 | 2017-01-09 | Compound sealing structure for ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720019399.7U CN206539725U (en) | 2017-01-09 | 2017-01-09 | Compound sealing structure for ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206539725U true CN206539725U (en) | 2017-10-03 |
Family
ID=59938765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720019399.7U Expired - Fee Related CN206539725U (en) | 2017-01-09 | 2017-01-09 | Compound sealing structure for ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206539725U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286615A (en) * | 2017-01-09 | 2018-07-17 | 凯泰阀门(集团)有限公司 | Compound sealing structure for ball valve |
-
2017
- 2017-01-09 CN CN201720019399.7U patent/CN206539725U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286615A (en) * | 2017-01-09 | 2018-07-17 | 凯泰阀门(集团)有限公司 | Compound sealing structure for ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20171003 |