CN211202948U - Soft and hard dual sealed four-valve seat structure - Google Patents
Soft and hard dual sealed four-valve seat structure Download PDFInfo
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- CN211202948U CN211202948U CN201922100043.8U CN201922100043U CN211202948U CN 211202948 U CN211202948 U CN 211202948U CN 201922100043 U CN201922100043 U CN 201922100043U CN 211202948 U CN211202948 U CN 211202948U
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Abstract
The utility model relates to an oil and gas pipeline ball valve technical field is a four disk seat structures of soft or hard dual seal particularly, including spheroid and valve body, its characterized in that: still include a hard seal disk seat and a soft seal disk seat, hard seal disk seat and soft seal disk seat are independent each other, hard seal disk seat and soft seal disk seat one side cooperate with the spheroid, constitute hard seal and soft seal respectively, hard seal disk seat one side is hard material, hard seal disk seat opposite side is through first spring and valve body connection, soft seal disk seat one side is equipped with the rubber circle, soft seal disk seat opposite side passes through the second spring and is connected with the valve body, be equipped with sealed oiling device between hard seal disk seat and the soft seal disk seat, the valve adopts soft or hard double seal structure, the sealed hard seal structure that adopts of first order, the hidden danger that pipeline large granule medium probably harms soft seal disk seat in the valve use initial stage has been eliminated, and self can reach sealed requirement.
Description
Technical Field
The utility model relates to a petroleum and natural gas pipeline ball valve technical field is a four disk seat structures of soft or hard dual seal particularly.
Background
Nowadays, the development of oil and gas pipeline ball valves is more and more mature, but the pipeline ball valves in front of and behind critical emergency shut-off valves and pig ball receiving and dispatching devices are damaged and leaked to different degrees.
At present, a common pipeline ball valve product generally adopts a soft sealing mode, and a plurality of manufacturers call that so-called soft and hard double sealing can not meet the requirements. The soft sealing rubber material of the valve is easily damaged during pipe cleaning and in the case of large-particle media, so that leakage is caused. In view of this problem, in recent years, many design houses have begun to choose hard-sealing ball valves as seals for emergency shut-offs and critical locations in the pipeline. However, the larger diameter hard seal ball valve is difficult to achieve zero leakage, and the leakage amount is increased along with the abrasion of the sealing surface.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve prior art's not enough, provide a dependable performance, have the ball valve seating structure of the dual sealed four disk seats forms of soft or hard of good life.
In order to realize above-mentioned purpose, design a four disk seat structures of soft or hard dual seal, including spheroid and valve body, its characterized in that: still include a hard seal disk seat and a soft seal disk seat, hard seal disk seat and soft seal disk seat are independent each other, and hard seal disk seat and soft seal disk seat one side cooperate with the spheroid, constitute hard seal and soft seal respectively, and hard seal disk seat one side is hard material, and hard seal disk seat opposite side is connected through first spring and valve body, and soft seal disk seat one side is equipped with the rubber circle, and soft seal disk seat opposite side passes through the second spring and is connected with the valve body, is equipped with sealed oiling device between hard seal disk seat and the soft seal disk seat.
The rubber ring is fixed on the soft sealing valve seat through a soft sealing valve seat pressing plate and a screw.
The soft sealing valve seat is provided with a first O-shaped ring and fireproof graphite, a check ring is arranged on one side of the first O-shaped ring, and the hard sealing valve seat is provided with a second O-shaped ring and fireproof graphite.
Compared with the prior art, the utility model, its advantage lies in: the valve adopts a soft and hard double sealing structure, the primary sealing adopts a hard sealing structure, the hidden danger that large granular media of the pipeline possibly damage a soft sealing valve seat in the initial use stage of the valve is eliminated, and the valve can reach the sealing requirement; as the hard seal valve seat wears away, the first stage seal effect decreases with some amount of leakage; at the moment, the second-stage seal still functions, the valve still can reach zero leakage because the soft seal valve seat is protected by the hard seal valve seat in the earlier stage, and in addition, the soft seal valve seat can be designed into a single double form according to the use working condition, so that the automatic pressure relief function is met.
Drawings
FIG. 1 is a schematic view of a valve seat on one side of the valve of the present invention;
FIG. 2 is a schematic view of the valve seat structure on the other side of the valve according to the present invention;
in the figure: 1. a sphere; 2. a soft seal valve seat; 3. a hard seal valve seat; 4. a rubber ring; 5. a screw; 6. a soft sealing valve seat pressing plate; 7. a valve body; 8. a second spring; 9. fireproof graphite; 10. a first O-ring; 11. a retainer ring; 12. a first spring; 13. a second O-ring.
Detailed Description
The structure and principle of such a device will be apparent to those skilled in the art from the following further description of the invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a soft and hard dual-sealing four-valve seat structure comprises a ball 1, a valve body 7, a hard sealing valve seat 3, a soft sealing valve seat 2, a first O-ring 10, a second O-ring 13, a first spring 12, a second spring 8 and a rubber ring 4; the sealing surfaces of the ball body 1 and the hard sealing valve seat 3 are hardened, the soft sealing valve seat 2 is provided with a rubber ring 4, the rubber ring 4 is fixed with a screw 5 through a soft sealing valve seat pressure plate 6, and the valve body 7 is provided with a sealing oil injection device.
The ball body 1 and the hard sealing valve seat 3 adopt a metal-to-metal hard sealing mode, one side of the hard sealing valve seat 3 adopts hard materials such as metal and the like to form a first-stage seal, and large-particle media of a pipeline at the initial stage of use of the valve are filtered; the ball body 1 and the soft sealing valve seat 2 adopt a rubber ring soft sealing mode, the sealing can simultaneously act with hard sealing, and good sealing effect is continuously achieved after the hard sealing valve seat is worn at the later stage.
The soft sealing valve seat 2 and the hard sealing valve seat 3 are two independent parts, a sealing oil injection device is designed between the two valve seats, the soft sealing is arranged on the upper portion of the hard sealing, a gap is formed between the soft sealing valve seat 2 and the hard sealing valve seat 3, the gap is communicated with the oil injection device, the emergency grease injection of the valve after burning or sealing failure is realized, the soft sealing valve seat 2 can be designed into a single double form according to the use working condition, and the automatic pressure relief function is met.
Claims (3)
1. The utility model provides a four disk seat structures of soft or hard dual seal, includes spheroid (1) and valve body (7), its characterized in that: still include a hard sealing disk seat (3) and a soft sealing disk seat (2), hard sealing disk seat (3) and soft sealing disk seat (2) are independent each other, hard sealing disk seat (3) and soft sealing disk seat (2) one side cooperate with spheroid (1), constitute hard sealing and soft sealing respectively, hard sealing disk seat (3) one side is hard material, hard sealing disk seat (3) opposite side is connected through first spring (12) and valve body (7), soft sealing disk seat (2) one side is equipped with rubber circle (4), soft sealing disk seat (2) opposite side is connected with valve body (7) through second spring (8), be equipped with sealed oiling device between hard sealing disk seat (3) and the soft sealing disk seat (2).
2. A dual soft and hard seal four valve seat structure as claimed in claim 1, wherein: the rubber ring (4) is fixed on the soft sealing valve seat (2) through a soft sealing valve seat pressure plate (6) and a screw (5).
3. A dual soft and hard seal four valve seat structure as claimed in claim 1, wherein: be equipped with first O type circle (10) and fire prevention graphite (9) on soft seal disk seat (2), first O type circle (10) one side is equipped with retaining ring (11), be equipped with second O type circle (13) and fire prevention graphite (9) on hard seal disk seat (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922100043.8U CN211202948U (en) | 2019-11-29 | 2019-11-29 | Soft and hard dual sealed four-valve seat structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922100043.8U CN211202948U (en) | 2019-11-29 | 2019-11-29 | Soft and hard dual sealed four-valve seat structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211202948U true CN211202948U (en) | 2020-08-07 |
Family
ID=71853198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922100043.8U Active CN211202948U (en) | 2019-11-29 | 2019-11-29 | Soft and hard dual sealed four-valve seat structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211202948U (en) |
-
2019
- 2019-11-29 CN CN201922100043.8U patent/CN211202948U/en active Active
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