CN201661683U - Piston sealing structure of valve actuator - Google Patents
Piston sealing structure of valve actuator Download PDFInfo
- Publication number
- CN201661683U CN201661683U CN2010201158664U CN201020115866U CN201661683U CN 201661683 U CN201661683 U CN 201661683U CN 2010201158664 U CN2010201158664 U CN 2010201158664U CN 201020115866 U CN201020115866 U CN 201020115866U CN 201661683 U CN201661683 U CN 201661683U
- Authority
- CN
- China
- Prior art keywords
- piston
- sealing structure
- valve actuator
- utility
- sealing
- 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
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Abstract
The utility model relates to a piston sealing structure of a valve actuator. A piston reciprocates inside a cylinder; a balance ring is arranged in the middle of the outer circumferential face of the piston; sealing rings with special shaped sections and an opening on the single side are pairwise arranged on two sides of the balance ring; and the opening sides of the balance rings are opposite to each other. The piston sealing structure can ensure effective sealing by adopting the sealing rings with the special sections in pairwise arrangement, and ensures steadiness of piston motion by adopting the balance rings and the cylinder in clearance fit with each other.
Description
Technical field
The utility model relates to the valve arrangement field, especially the final controlling element of valve.
Background technique
Industrial valve often adopts pneumatic actuator that valve is driven, and pneumatic actuator generally is made up of cylinder body, piston and connecting rod, and piston is to-and-fro motion in cylinder body, drives valve by connecting rod and realizes opening closed action.General pneumatic actuator is provided with the O RunddichtringO and prevents gas leakage between piston and cylinder body at present, though the O RunddichtringO is cheap, it is extensive to use, but it relatively is suitable for the application of static sealing, dynamic case for the piston type frequently reciprocating, adopt the O RunddichtringO not only can not reach the better seal effect, and being easy to wearing and tearing, working life is short.
The model utility content
The applicant should not adopt the problem of O RunddichtringO at sealing between the piston of above-mentioned existing pneumatic actuator and the cylinder body, a kind of piston sealing structure of valve actuator rational in infrastructure is provided, thereby can realizes effective seal.
The technological scheme that the utility model adopted is as follows:
A kind of piston sealing structure of valve actuator, piston is reciprocating in cylinder interior, is provided with gimbal at piston outer circumferential face middle part, and the odd-shaped cross section seal ring of one-sided opening is set in pairs in the gimbal both sides, and its opening end is opposite.
The utility model adopts the odd-shaped cross section seal ring that is provided with in pairs, can guarantee effective seal, adopts gimbal and cylinder body Spielpassung simultaneously, guarantees the stationarity of piston motion.
Description of drawings
Fig. 1 is for using valve actuator of the present utility model;
Fig. 2 is an odd-shaped cross section seal ring of the present utility model;
Fig. 3 is the A place enlarged view of Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.
As shown in Figure 1; valve actuator described in the utility model comprises cylinder body 1, piston 4 and connecting rod (not shown); piston 4 materials are spheroidal graphite cast iron; can in cylinder body 1, do reciprocating linear motion; at the outer circumferential face of piston 4 middle part gimbal 2 is set, the internal diameter Spielpassung of the external diameter of gimbal 2 and cylinder body 1 is when guaranteeing piston motion and concentricity of cylinder body; the material of gimbal 2 is copper and teflon mixture, can guarantee the wear resistance requirement.Both sides at gimbal 2 are provided with odd-shaped cross section seal ring 3 in pairs, and as Fig. 2, shown in Figure 3, the cross section 5 of odd-shaped cross section seal ring 3 is similar to " ∠ " type, and its base plane lock ring is installed in the circumferential groove of piston 4, and the top, inclined-plane contacts with the internal face of cylinder body 1; Seal ring 3 be provided with in pairs and wedge angle relatively, opening outwardly, rely on elastic properties of materials that the internal face of cylinder body 1 is close on the inclined-plane under the normal state, under the effect of cylinder air pressure, further strut seal ring 3 during work, make it possess better sealing.
More than describing is to explanation of the present utility model, is not the qualification to model utility, and the utility model institute restricted portion is referring to claim, and under the situation of spirit of the present utility model, the utility model can be done any type of modification.
Claims (1)
1. the piston sealing structure of a valve actuator, piston is reciprocating in cylinder interior, it is characterized in that: described piston outer circumferential face middle part is provided with gimbal, and the odd-shaped cross section seal ring of one-sided opening is set in pairs in the gimbal both sides, and its opening end is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201158664U CN201661683U (en) | 2010-02-11 | 2010-02-11 | Piston sealing structure of valve actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201158664U CN201661683U (en) | 2010-02-11 | 2010-02-11 | Piston sealing structure of valve actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201661683U true CN201661683U (en) | 2010-12-01 |
Family
ID=43232098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201158664U Expired - Fee Related CN201661683U (en) | 2010-02-11 | 2010-02-11 | Piston sealing structure of valve actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201661683U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244668A (en) * | 2013-05-27 | 2013-08-14 | 陕西法士特齿轮有限责任公司 | Piston |
-
2010
- 2010-02-11 CN CN2010201158664U patent/CN201661683U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244668A (en) * | 2013-05-27 | 2013-08-14 | 陕西法士特齿轮有限责任公司 | Piston |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20130211 |