CN201368257Y - Double-sealing ball valve - Google Patents
Double-sealing ball valve Download PDFInfo
- Publication number
- CN201368257Y CN201368257Y CNU200920126066XU CN200920126066U CN201368257Y CN 201368257 Y CN201368257 Y CN 201368257Y CN U200920126066X U CNU200920126066X U CN U200920126066XU CN 200920126066 U CN200920126066 U CN 200920126066U CN 201368257 Y CN201368257 Y CN 201368257Y
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- CN
- China
- Prior art keywords
- stuffing box
- sealing
- valve
- ball valve
- double
- 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 discloses a double-sealing ball valve, comprising a valve body, a spherical valve seat arranged on the valve body, a spherical valve core, a valve pole and a motive sealing device; the motive sealing device comprises a stuffing box arranged between the valve body and the valve pole and a stuffing box gland, a sealing packing layer is tightly pressed in the stuffing box by the stuffing box gland, a sealing ring parallel to the sealing packing layer is arranged in the stuffing box; in the utility model, a layer of the sealing ring is added in the stuffing box of the motive sealing device to achieve double-sealing effect, therefore, the double-sealing ball valve can ensure no external leakage for a long time, prolongs the normal using period of the ball valve, reduces overhauling times and improves the safety degree in the using process; after the sealing packing layer is wore, the leakage can not be caused immediately; the double-sealing ball valve can be used under the working environment with special requirements, such as easy-corrosion medium, good sealing effect can be achieved.
Description
Technical field
The utility model relates to a kind of ball valve, is a kind of double-seal ball valve.
Background technique
Ball valve is indispensable in Chemical Manufacture and daily life, and ball valve only need just can be closed tightly with revolving the operation that turn 90 degrees and very little moment of rotation.Completely parallel body cavity is difficult for being widely used in every profession and trade by the medium erosion for medium provides resistance very little, straight-through runner.The main feature of ball valve is compact structure own, and easy operating and maintenance are applicable to general work media such as water, solvent, acid and rock gas, but also are applicable to the medium that operating conditions is abominable, as oxygen, hydrogen peroxide, methane and ethene etc.Therefore, the application area of ball valve is more and more wider, and external sealed in its valve has also been proposed higher requirement, particularly the ball valve that uses on family's gas pipeline is related to user's personal safety, therefore especially, preventing the ball valve external leaks, is the key factor of estimating the ball valve quality.
The sealing of ball valve mainly comprises stuffing box motive sealing and valve body gland static seal, and the static seal sealing is more stable, and motive sealing makes the principal element that causes the ball valve external leaks.In the prior art, ball valve sealing adopts the structure that is pressed with the stuffing box packing layer in the stuffing box by Gland, under the long-time situation about using, the wearing and tearing of stuffing box packing layer can cause leakage, gland housing pin above the stuffing box packing layer is loosening, also causes leakage easily, simultaneously, in the working environment of specific (special) requirements, such as causing leakage in the perishable medium easily.
Therefore, need transform, can guarantee for a long time that external leaks does not take place ball valve, prolong the normal life cycle of ball valve, reduce the maintenance number of times, improve the margin of safety in the using process the movable sealing structure of ball valve.
The model utility content
In view of this, the purpose of this utility model provides a kind of double-seal ball valve, and dynamic seal apparatus can guarantee for a long time that external leaks does not take place ball valve, prolongs the normal life cycle of ball valve, reduces the maintenance number of times, improves the margin of safety in the using process.
Double-seal ball valve of the present utility model, comprise valve body, be arranged on spherical valve seat, spherical valve core, valve rod and dynamic seal apparatus on the valve body, described dynamic seal apparatus comprises stuffing box and the Gland that is arranged between valve body and the valve rod, be pressed with the stuffing box packing layer by Gland in the described stuffing box, be set up in parallel seal ring with the stuffing box packing layer in the described stuffing box.
Further, described seal ring is arranged on the stuffing box packing layer near valve body one side;
Further, described seal ring is a nitrile rubber O RunddichtringO;
Further, described stuffing box packing layer is the polytetrafluoroethylene bushing structure.
The beneficial effects of the utility model are: double-seal ball valve of the present utility model, adopt the structure that in stuffing box, adds one deck seal ring at dynamic seal apparatus, reach the double-sealing effect, can guarantee for a long time that external leaks does not take place ball valve, prolong the normal life cycle of ball valve, reduce the maintenance number of times, improve the margin of safety in the using process.Can not cause leakage immediately after the wearing and tearing of stuffing box packing layer, also can be in the working environment of specific (special) requirements, such as reaching good sealing in the perishable medium.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Accompanying drawing is a structural representation of the present utility model.
Embodiment
Accompanying drawing is a structural representation of the present utility model, as shown in the figure: the double-seal ball valve of present embodiment, comprise valve body 1, be arranged on spherical valve seat 7, spherical valve core 2, valve rod 3 and dynamic seal apparatus on the valve body 1, dynamic seal apparatus comprises stuffing box and the Gland 4 that is arranged between valve body 1 and the valve rod 3, be pressed with the stuffing box packing layer 5 of polytetrafluoroethylene bushing structure in the stuffing box by Gland 4, be set up in parallel nitrile rubber O RunddichtringO 6 with stuffing box packing layer 5 in the stuffing box, adopt nitrile rubber O RunddichtringO, cost is low, good seal performance; Nitrile rubber O RunddichtringO 6 is arranged on stuffing box packing layer 5 near valve body 1 one sides, can stop effectively that fluid to the erosion of stuffing box packing layer with alleviate the pressure of fluid to the stuffing box packing layer, is beneficial to the life cycle that prolongs the stuffing box packing layer.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (4)
1. double-seal ball valve, comprise valve body (1), be arranged on spherical valve seat (7), spherical valve core (2), valve rod (3) and dynamic seal apparatus on the valve body (1), described dynamic seal apparatus comprises stuffing box and the Gland (4) that is arranged between valve body (1) and the valve rod (3), it is characterized in that: be pressed with stuffing box packing layer (5) by Gland (4) in the described stuffing box, be set up in parallel seal ring (6) with stuffing box packing layer (5) in the described stuffing box.
2. double-seal ball valve according to claim 1 is characterized in that: described seal ring (6) is arranged on stuffing box packing layer (5) near valve body (1) one side.
3. double-seal ball valve according to claim 2 is characterized in that: described seal ring (6) is a nitrile rubber O RunddichtringO.
4. double-seal ball valve according to claim 3 is characterized in that: described stuffing box packing layer (5) is the polytetrafluoroethylene bushing structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200920126066XU CN201368257Y (en) | 2009-01-09 | 2009-01-09 | Double-sealing ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200920126066XU CN201368257Y (en) | 2009-01-09 | 2009-01-09 | Double-sealing ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201368257Y true CN201368257Y (en) | 2009-12-23 |
Family
ID=41487149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200920126066XU Expired - Fee Related CN201368257Y (en) | 2009-01-09 | 2009-01-09 | Double-sealing ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201368257Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089042A (en) * | 2014-07-19 | 2014-10-08 | 苏州创维晟自动化科技有限公司 | Durable ball valve |
| CN105427468A (en) * | 2015-12-29 | 2016-03-23 | 成都兴联宜科技有限公司 | Photoelectric direct-reading remote smart IC (integrated circuit) card water meter |
-
2009
- 2009-01-09 CN CNU200920126066XU patent/CN201368257Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089042A (en) * | 2014-07-19 | 2014-10-08 | 苏州创维晟自动化科技有限公司 | Durable ball valve |
| CN105427468A (en) * | 2015-12-29 | 2016-03-23 | 成都兴联宜科技有限公司 | Photoelectric direct-reading remote smart IC (integrated circuit) card water meter |
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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: 20091223 Termination date: 20110109 |