CN203215058U - Valve rod sealing structure of ball valve - Google Patents
Valve rod sealing structure of ball valve Download PDFInfo
- Publication number
- CN203215058U CN203215058U CN 201320252825 CN201320252825U CN203215058U CN 203215058 U CN203215058 U CN 203215058U CN 201320252825 CN201320252825 CN 201320252825 CN 201320252825 U CN201320252825 U CN 201320252825U CN 203215058 U CN203215058 U CN 203215058U
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- Prior art keywords
- valve rod
- valve
- sealing
- valve body
- disk springs
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- Expired - Fee Related
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Abstract
The utility model discloses a valve rod sealing structure of a ball valve. The valve rod sealing structure comprises a valve rod and a valve body, wherein a shoulder is arranged on the valve rod, disk springs are arranged on the shoulder of the valve rod, sealing rings are arranged on the disk springs, portions of the sealing rings, which are in contact with the valve body, are in cambered surface structures, and contact faces of the valve body which is matched with the sealing rings are in cambered surface structures. The disk springs and the sealing rings which are matched with the disk springs are arranged on the popping-proof shoulder of the original valve rod, so that the popping-proof function is implemented, and the good sealing effect is achieved; a flexible graphite part is used, so that good sealing and lubricating effects are achieved; the valve body which is matched with the structure is designed in the cambered surface structure, so that the machining amount is reduced, and the valve body is well matched with the shape of a sealing gasket; the double disk springs are used, so that the sealing effect is further improved. The valve rod sealing structure is simple in structure, low in cost, capable of prolonging the service life of the ball valve and good in sealing performance, and the application value of the valve rod sealing structure is developed to the maximum extent under the same resource conditions.
Description
Technical field
The utility model belongs to the ball valve sealing technical field, is specifically related to a kind of ball valve valve rod leak-proof structure.
Background technique
Ball valve is widely used in industries such as petroleum refining, long-distance transport pipes, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, iron and steel, its main feature is effective throttling, the wire drawing phenomenon is minimized thereby reduce the soaking of valve and valve seat (dashing) erosion, and simple in structure, good seal performance, fluid resistance are little; Disclose a kind of dicyclo bar shoulder seal in CN 101398093A, be made up of seal ring, hold-down ring and sphere or tapered rod shoulder, its seal ring material is worked by ultimate strength load ground by selfsealings by the design of ultimate strength load and automatic release forever.The dual valve stem seal of a kind of independence, by dicyclo bar shoulder seal, triangle section loop bar column sealing and isolation matching pair are formed, can guarantee to install when being compacted to the valve rod torque and obviously increasing, isolate and cooperate, bar shoulder seal and roofbolt sealing come into force simultaneously automatically and independently bear limit pressure medium, the dual assurance valve stem seal in mutual noninterference ground, yet its cost is higher, and lubrication effect is not good, the sealing problem of unresolved valve rod right-angled, between field inner valve stem commonly used and valve body, adopt seal ring to seal, but sealing is not good, so need a kind of simple in structure, easy and simple to handle, better tightness, the ball valve valve rod leak-proof structure of long service life.
The model utility content
The purpose of this utility model is to provide the ball valve valve rod leak-proof structure of a kind of simple in structure, easy and simple to handle, better tightness, long service life.
Realize that the technological scheme that the purpose of this utility model adopts is: a kind of ball valve valve rod leak-proof structure, comprise valve rod and valve body, wherein valve rod is provided with convex shoulder, on the described valve rod convex shoulder belleville spring is set, on the described belleville spring seal ring is set, described seal ring and valve body contact position are globoidal structure, and the valve body surface of contact that described seal ring matches is globoidal structure.
Described seal ring is the Expanded graphite product.
The quantity of described belleville spring is two.
The utility model is at the seal ring that the explosion-proof design convex shoulder of script valve rod arranges belleville spring and cooperates with it, not only played anti-ly to produce function but also played good seal action; Adopt the Expanded graphite product, not only played good seal action, also making has the graphite lubrication effect to rotate leicht fallen D/A when the valve body internal pressure raises; And the valve body that will cooperate with it is made as cambered surface, not only reduced amount of finish, and it has obtained good the cooperation with the sealing gasket shape, make better tightness when pressure is arranged, prevent that medium solution from overflowing from valve rod, played double seal with the seal ring of top, prolonged working life, also made when rotating more laborsaving; Adopt two belleville springs further to increase sealing effect, prevent the seal clearance that seal ring falls to causing after pressure release, medium is overflowed to the damage of valve rod; Working life, better tightness that the utility model is simple in structure, with low cost, improved ball valve are being brought into play its use value to greatest extent under equal resources supplIes.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1: a kind of ball valve valve rod leak-proof structure, comprise valve rod 1 and valve body 4, wherein valve rod 1 is provided with convex shoulder 5, on the described valve rod convex shoulder 5 belleville spring 3 is set, on the described belleville spring 3 seal ring 2 is set, described seal ring 2 is globoidal structure with valve body 4 contact position, and valve 4 contact levels that described seal ring 2 matches are globoidal structure.
Described seal ring 2 is the Expanded graphite product.
The quantity of described belleville spring 3 is two.
The utility model is at the seal ring that the explosion-proof design convex shoulder of script valve rod arranges belleville spring and cooperates with it, not only played anti-ly to produce function but also played good seal action; Adopt the Expanded graphite product, not only played good seal action, also making has the graphite lubrication effect to rotate leicht fallen D/A when the valve body internal pressure raises; And the valve body that will cooperate with it is made as cambered surface, not only reduced amount of finish, and it has obtained good the cooperation with the sealing gasket shape, make better tightness when pressure is arranged, prevent that medium solution from overflowing from valve rod, played double seal with the seal ring of top, prolonged working life, also made when rotating more laborsaving; Adopt two belleville springs further to increase sealing effect, prevent the seal clearance that seal ring falls to causing after pressure release, medium is overflowed to the damage of valve rod; Working life, better tightness that the utility model is simple in structure, with low cost, improved ball valve are being brought into play its use value to greatest extent under equal resources supplIes.
Claims (3)
1. ball valve valve rod leak-proof structure, comprise valve rod and valve body, it is characterized in that: wherein valve rod is provided with convex shoulder, on the described valve rod convex shoulder belleville spring is set, on the described belleville spring seal ring is set, described seal ring and valve body contact position are globoidal structure, and the valve body surface of contact that described seal ring matches is globoidal structure.
2. ball valve valve rod leak-proof structure according to claim 1, it is characterized in that: described seal ring is the Expanded graphite product.
3. ball valve valve rod leak-proof structure according to claim 1, it is characterized in that: the quantity of described belleville spring is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320252825 CN203215058U (en) | 2013-05-11 | 2013-05-11 | Valve rod sealing structure of ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320252825 CN203215058U (en) | 2013-05-11 | 2013-05-11 | Valve rod sealing structure of ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203215058U true CN203215058U (en) | 2013-09-25 |
Family
ID=49204597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320252825 Expired - Fee Related CN203215058U (en) | 2013-05-11 | 2013-05-11 | Valve rod sealing structure of ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203215058U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523729A (en) * | 2015-09-10 | 2017-03-22 | 中国石油天然气集团公司 | Low-temperature top-assembling type fixed ball valve |
-
2013
- 2013-05-11 CN CN 201320252825 patent/CN203215058U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523729A (en) * | 2015-09-10 | 2017-03-22 | 中国石油天然气集团公司 | Low-temperature top-assembling type fixed ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130925 Termination date: 20170511 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |