CN2396248Y - Double-sealed pipeline ball valve - Google Patents
Double-sealed pipeline ball valve Download PDFInfo
- Publication number
- CN2396248Y CN2396248Y CN 99254521 CN99254521U CN2396248Y CN 2396248 Y CN2396248 Y CN 2396248Y CN 99254521 CN99254521 CN 99254521 CN 99254521 U CN99254521 U CN 99254521U CN 2396248 Y CN2396248 Y CN 2396248Y
- Authority
- CN
- China
- Prior art keywords
- sealing
- valve
- valve body
- ball
- seat
- 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 - Lifetime
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Abstract
The utility model relates to a dually sealed pipeline ball valve. Both ends of a valve body are provided with secondary valve bodies, and the middle is provided with a ball core; a tubular sealing base, the inner end of which is provided with a lug boss in the shape of a flange disk, is respectively embedded in the two secondary valve bodies; a tetrafluorated sealing valve seat which is hermetically connected with the ball core is embedded in the inner end surface of each of the lug bosses; a piston, the upper part and the lower part of which are respectively provided with O-shaped sealing rings, is respectively nested between each of the sealing valve seats and each of the secondary valve bodies; medium passages are arranged among the sealing bases, the pistons and the secondary valve bodies; a butterfly-shaped pressure spring is clamped between each of the lug bosses of the sealing bases and each of pistons which are sheathed in the sealing bases. The utility model effectively utilizes the property that tetrafluorated materials can be self-lubricated and can automatically compensate the micro unflatness of the surface of the ball core and realizes the purposes of dual sealing, no leakage and long service life.
Description
The utility model relates to a kind of ball valve, particularly a kind of double-sealing pipeline ball-valve.
At present the ball valve that uses can only one-way sealing, leaks easily, and the valve body lumen is because of there being the medium existence, not only can cause certain waste, and some easy crystallization and decomposition media also can cause serious infringement to valve body itself, thereby reduced the performance and the life-span of valve, increased the operation and maintenance expense.
The purpose of this utility model is to provide that a kind of sealing effect is better, the life-span is long, leak free double-sealing pipeline ball-valve.
Technological scheme is as follows:
A kind of double-sealing pipeline ball-valve, comprise valve body 1, ball core 2, valve rod 3 and actuator 4, it is characterized in that: connecting between two auxiliary valve bodies 5,6 about valve body 1 two ends have, left auxiliary valve body 5 and valve body 1 is the airtight connection of split, and right auxiliary valve body 6 is with valve body 1 split or be linked into one; One tubulose is arranged and the inner sealing seat 7 that has flange plate-like boss 71 with the 2 symmetry embeddings of ball core in two auxiliary valve bodies 5,6, embed on boss 71 interior edge faces have one with the ball core 2 airtight polytetrafluoroethylsealed sealed valve seats 8 that join, be nested with a piston 9 that has " O " shape seal ring up and down respectively between sealing seat 7 and the auxiliary valve body; Be provided with medium channel 10 between sealing seat 7 and piston 9 and the auxiliary valve body 5.
Accompany a butterfly or some cylindrical stage clips 11 between the boss of sealing seat 7 and the cover piston 9 thereon.
Be pressed with a pressing plate 12 that is fixed on the boss 71 on the seal valve seat 8.
The utility model makes ball core front and back to seal owing to adopted such scheme, and good self-lubricating property and the automatic superior function that compensates ball wicking surface microcosmic injustice of PTFE makes the utility model can reach zero leakage, long lifetime in addition.
Below in conjunction with accompanying drawing 1 to 2 and embodiment the utility model is done more careful description.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the partial cutaway schematic of Fig. 1.
Embodiment:
The double-sealing pipeline ball-valve comprises valve body 1, with Bolt Connection one left auxiliary valve body 5 is arranged at the left end of valve body 1, and right-hand member is for making the auxiliary valve body 6 of one with valve body 1; Ball core 2 is positioned in the middle of the valve body 1 with ordinary ball valve, equally is associated with a valve rod with ordinary ball valve, and the ball core adopts fixedly ball, by last bottom flange 13,14 its central positions of assurance move left and right with pressure medium in use not.Link to each other with embedded structure by the sealing seat 7 of metal and polytetrafluoroethylsealed sealed valve seat 8, and be fixed with a pressing plate 12 that is pressed on the seal valve seat 8 on the boss 71 with screw, can guarantee the sealing effect of seal valve seat 8, utilized the superior function of good self-lubricating property of PTFE and automatic compensation ball wicking surface microcosmic injustice preferably, polytetrafluoroethylsealed sealed valve seat 8 is embedded in the sealing seat 7 of metal, and, can also prevent the cold flow of tetrafluoro generation under high pressure phenomenon with the structure that pressing plate 12 compresses.Seal valve seat 8 be provided with behind a butterfly spring or cylinder stage clip can adjust in good time by ball core 2 and about the seal pressure of the sealing pair formed of two seal valve seats 5,6, and can compensate the wearing and tearing of polytetrafluoroethylsealed sealed valve seat 8 and ball core 2, thereby guarantee long lifetime, the high-performance of product.The utility model has utilized the principle of piston effect, sealing seat 7 is provided with the piston 9 of two pass " O " type circle sealing, because sealing seat 7, medium channel 10 between piston 9 and the auxiliary valve body 5, before valve, lumen, the pressure that produces behind the valve, the anchor ring product moment that the size of the potted line that combination seal valve seat 8 forms and the size of piston 9 form, pressure medium affacts on this anchor ring, backward sealing force is provided for left seal valve seat 5, forward sealing force is provided for right seal valve seat, two valve seats are moved to the centre synchronously hold the ball core tightly, suitable seal pressure is provided, thereby reaches zero leakage.
Claims (3)
1. double-sealing pipeline ball-valve, comprise valve body (1), ball core (2), valve rod (3) and actuator (4), it is characterized in that: two auxiliary valve bodies (5,6) about valve body (1) two ends have, between left side auxiliary valve body (5) and the valve body (1) to connect be the airtight connection of split, right auxiliary valve body (6) and valve body (1) split link or are integral; Each embeds and a tubulose is arranged and the inner has the sealing seat (7) of flange plate-like boss (71) in two auxiliary valve bodies (5,6), embed on boss (71) interior edge face have one with the airtight polytetrafluoroethylsealed sealed valve seat (8) that joins of ball core (2), be nested with a piston (9) that has " O " shape seal ring up and down respectively between sealing seat (7) and the auxiliary valve body; Be provided with medium channel (10) between sealing seat (7) and piston (9) and the auxiliary valve body (5).
2. double-sealing pipeline ball-valve as claimed in claim 1 is characterized in that accompanying a butterfly or some cylindrical stage clips (11) between the boss (71) of sealing seat (7) and the piston (9).
3. double-sealing pipeline ball-valve as claimed in claim 1 or 2 is characterized in that being pressed with a pressing plate (12) that is fixed on the boss (71) on the seal valve seat (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99254521 CN2396248Y (en) | 1999-11-17 | 1999-11-17 | Double-sealed pipeline ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99254521 CN2396248Y (en) | 1999-11-17 | 1999-11-17 | Double-sealed pipeline ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2396248Y true CN2396248Y (en) | 2000-09-13 |
Family
ID=34038127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99254521 Expired - Lifetime CN2396248Y (en) | 1999-11-17 | 1999-11-17 | Double-sealed pipeline ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2396248Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102084163B (en) * | 2006-08-14 | 2014-03-12 | 宋永生 | Valve reducing abrasion between closing part and valve seat seal surface when sliding relatively |
-
1999
- 1999-11-17 CN CN 99254521 patent/CN2396248Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102084163B (en) * | 2006-08-14 | 2014-03-12 | 宋永生 | Valve reducing abrasion between closing part and valve seat seal surface when sliding relatively |
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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 | ||
| CX01 | Expiry of patent term |