CN207989785U - A kind of sealing structure of ball-valve valve rod and valve seat - Google Patents
A kind of sealing structure of ball-valve valve rod and valve seat Download PDFInfo
- Publication number
- CN207989785U CN207989785U CN201820128970.3U CN201820128970U CN207989785U CN 207989785 U CN207989785 U CN 207989785U CN 201820128970 U CN201820128970 U CN 201820128970U CN 207989785 U CN207989785 U CN 207989785U
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- CN
- China
- Prior art keywords
- valve
- valve rod
- ring
- ball
- support ring
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model is related to the sealing structures of a kind of ball-valve valve rod and valve seat, including sphere, valve body and valve rod, the valve body interior sealing installs sphere, the top of the sphere is coaxially fixedly mounted with valve rod, the top sealing installation gland of the valve rod, installed thrust bearing on the shaft shoulder of gland and valve rod, coaxial spaced installs support ring and lower support ring on valve rod below the shaft shoulder, on this, two groups of O-ring seal components are installed between lower support ring, shading ring is installed on valve rod between two groups of O-ring seal components, pressing sleeve is installed on valve rod between the upper support ring and O-ring seal component.Valve rod in this ball valve is supported by upper and lower support ring, and valve rod is made to be in the state of frictional force minimum, with gland, shading ring, pressing sleeve without friction.The utility model is simple in structure, design is scientific and reasonable, is skillfully constructed, and improves the sealing performance of product, the value with wide popularization and application.
Description
Technical field
The utility model belongs to valve field, is related to the sealing structure of ball valve, especially a kind of ball-valve valve rod and valve seat.
Background technology
Ball valve is the valve that opening and closing element (sphere) is driven by valve rod, and rotated around ball valve axis.Ball valve sealing
Quality directly affects the quality and service life of valve.
By finding that the nitrile rubber O-ring at valve rod is worn to the decomposition for revealing failure ball valve.In addition, it is found that
Sphere is not tight with valve base sealing, often reveals, and reduces the service life of valve.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, the sealing knot of a kind of ball-valve valve rod and valve seat is provided
Structure.
What the embodiment of the utility model was realized in：
The sealing structure of a kind of ball-valve valve rod and valve seat, including sphere, valve body and valve rod, the valve body interior sealing installation
The top of sphere, the sphere is coaxially fixedly mounted with valve rod, and the top of the valve rod, which seals, installs gland, pacifies on the shaft shoulder of gland and valve rod
Fill thrust bearing, coaxial spaced installs support ring and lower support ring on the valve rod below the shaft shoulder, the upper and lower support ring it
Between two groups of O-ring seal components are installed, shading ring, the upper support ring are installed on the valve rod between two groups of O-ring seal components
Pressing sleeve is installed on valve rod between O-ring seal component.
Moreover, the O-ring seal component includes O-ring and baffle ring, which is polytetrafluoroethylene material.
Moreover, installing valve seat between the valve body and sphere, which is formed with annular groove, interval in the annular groove
Left baffle ring, right baffle ring are installed, a pair of of butterfly spring is installed between the left and right baffle ring.
Moreover, being co-axially mounted pressure ring on the valve rod of the lower support ring lower face.
Moreover, installing dustband between valve rod and gland above the thrust bearing.
It is threadedly coupled moreover, the gland is used with valve body.
The advantages of the utility model and good effect are：
1, the valve rod in this ball valve is supported by upper and lower support ring, and valve rod is made to be in the state of frictional force minimum, with
Gland, shading ring, pressing sleeve are without friction.The friction that valve rod is solely subjected to the torsion of sphere and sealing surface of seat in this way and bearing generates
Power makes the leakproofness of valve rod improve, and the torque for making valve rod bear greatly drops since thrust bearing assumes responsibility for the pressure of medium
Low, rotation is flexible and convenient.Gland is connected through a screw thread and locks with valve body, the thrust metal on valve rod top also setting because of the shaft shoulder
It sets to prevent from going out because of hypertonia.
2, pretightning force is provided by a pair of of butterfly spring at valve seat, and no matter how temperature and pressure changes, and gives valve seat one always
A thrust can guarantee the sealing performance of valve valve, and can repair the abrasion of sealing surface.
3, the utility model is simple in structure, design is scientific and reasonable, is skillfully constructed, and improves the sealing performance of product, has
The value of wide popularization and application.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the portions I enlarged drawing in Fig. 1；
Fig. 3 is the structural schematic diagram of O-ring seal component in Fig. 2；
Fig. 4 is the portions II enlarged drawing in Fig. 1.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings and by specific embodiment.
The sealing structure of a kind of ball-valve valve rod and valve seat, such as Fig. 1, including sphere 3, valve body 1 and valve rod 2, the valve body
Interior sealing installs sphere, and the top of the sphere is coaxially fixedly mounted with valve rod.
The innovative point of the utility model is：
1, the top sealing installation gland 11 of the valve rod, as shown in Fig. 2, installed thrust on the shaft shoulder 6 of gland and valve rod
Bearing 5 reduces the frictional force generated when valve rod rotation, dustband 4 is installed between the valve rod and gland above the thrust bearing,
Coaxial spaced installs support ring 8 and lower support ring 12 on valve rod below the shaft shoulder, and two are installed between the upper and lower support ring
Group O-ring seal component 9, installs shading ring 10 on the valve rod between two groups of O-ring seal components, the upper support ring with it is O-shaped
Pressing sleeve 7 is installed on the valve rod between seal ring assembly.The gland is used with valve body and is threadedly coupled.
The structure of the O-ring seal component is as shown in figure 3, include O-ring 9B and baffle ring 9A, the baffle ring is polytetrafluoro
Vinyl material, wall thickness C are 0.2mm.The baffle ring holds valve rod tightly under the action of pressure medium, the pressure of O-ring after abrasion occurs
Baffle ring compensation is given in the recovery of contracting amount.
2, the sealing structure of the valve seat and sphere is as shown in figure 4,17 left part of valve seat is formed with annular groove, the annular groove
Left baffle ring 14, right baffle ring 16 are installed in interior interval, and a pair of of butterfly spring 15 is installed between the left and right baffle ring, is by butterfly spring
Valve seat provides thrust, effectively increases sealing effect.
In the present embodiment, pressure ring 13 is co-axially mounted on the valve rod of the lower support ring lower face.
Valve rod in this ball valve is supported by upper and lower support ring, so that valve rod is in the state of frictional force minimum, with pressure
Lid, shading ring, pressing sleeve are without friction.The friction that valve rod is solely subjected to the torsion of sphere and sealing surface of seat in this way and bearing generates
Power makes the leakproofness of valve rod improve, and the torque for making valve rod bear greatly drops since thrust bearing assumes responsibility for the pressure of medium
Low, rotation is flexible and convenient.Gland is connected through a screw thread and locks with valve body, the thrust metal on valve rod top also setting because of the shaft shoulder
It sets to prevent from going out because of hypertonia.Pretightning force is provided by a pair of of butterfly spring at valve seat, and no matter how temperature and pressure becomes
Change, gives one thrust of valve seat always, that is, can guarantee the sealing performance of valve valve, and the abrasion of sealing surface can be repaired.
It is emphasized that embodiment described in the utility model is illustrative, without being restrictive, therefore this reality
It is every new according to this practicality by those skilled in the art with the novel embodiment including being not limited to described in specific implementation mode
The other embodiment that the technical solution of type obtains also belongs to the range of the utility model protection.
Claims (6)
1. the sealing structure of a kind of ball-valve valve rod and valve seat, including sphere, valve body and valve rod, the valve body interior sealing mounting ball
The top of body, the sphere is coaxially fixedly mounted with valve rod, it is characterised in that：The top sealing installation gland of the valve rod, gland and valve rod
The shaft shoulder on installed thrust bearing, coaxial spaced installs support ring and lower support ring on the valve rod below the shaft shoulder, on this,
Two groups of O-ring seal components are installed between lower support ring, shading ring are installed on the valve rod between two groups of O-ring seal components, institute
It states and pressing sleeve is installed on the valve rod between support ring and O-ring seal component.
2. the sealing structure of ball-valve valve rod according to claim 1 and valve seat, it is characterised in that：The O-ring seal group
Part includes O-ring and baffle ring, which is polytetrafluoroethylene material.
3. the sealing structure of ball-valve valve rod according to claim 1 and valve seat, it is characterised in that：The valve body and sphere it
Between valve seat is installed, which is formed with annular groove, and left baffle ring, right baffle ring, the left and right baffle ring are installed in interval in the annular groove
Between a pair of of butterfly spring is installed.
4. the sealing structure of ball-valve valve rod according to claim 1 and valve seat, it is characterised in that：The lower support ring lower end
It is co-axially mounted pressure ring on the valve rod in face.
5. the sealing structure of ball-valve valve rod according to claim 1 and valve seat, it is characterised in that：Above the thrust bearing
Valve rod and gland between dustband is installed.
6. the sealing structure of ball-valve valve rod according to claim 1 and valve seat, it is characterised in that：The gland is adopted with valve body
It is threadedly coupled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820128970.3U CN207989785U (en) | 2018-01-25 | 2018-01-25 | A kind of sealing structure of ball-valve valve rod and valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820128970.3U CN207989785U (en) | 2018-01-25 | 2018-01-25 | A kind of sealing structure of ball-valve valve rod and valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207989785U true CN207989785U (en) | 2018-10-19 |
Family
ID=63821965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820128970.3U Expired - Fee Related CN207989785U (en) | 2018-01-25 | 2018-01-25 | A kind of sealing structure of ball-valve valve rod and valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207989785U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111204609A (en) * | 2019-12-31 | 2020-05-29 | 恒安(中国)纸业有限公司 | Cable winding disc |
-
2018
- 2018-01-25 CN CN201820128970.3U patent/CN207989785U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111204609A (en) * | 2019-12-31 | 2020-05-29 | 恒安(中国)纸业有限公司 | Cable winding disc |
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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 |
Granted publication date: 20181019 Termination date: 20220125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |