CN216279520U - Valve seat for antifriction ball valve - Google Patents
Valve seat for antifriction ball valve Download PDFInfo
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- CN216279520U CN216279520U CN202122597232.8U CN202122597232U CN216279520U CN 216279520 U CN216279520 U CN 216279520U CN 202122597232 U CN202122597232 U CN 202122597232U CN 216279520 U CN216279520 U CN 216279520U
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- valve
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- valve seat
- contact surface
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Abstract
The utility model discloses a valve seat for an antifriction ball valve. The valve seat is arranged between the valve body and the ball body, one side of the valve seat is a valve body contact surface, the other side of the valve seat is a ball body contact surface, a first sealing ring, a second sealing ring and a pre-tightening spring are sequentially arranged on the valve body contact surface, and a third sealing ring and a support ring are sequentially arranged on the ball body contact surface; the third sealing ring is in close contact with the ball body and is sealed, the third sealing ring comprises a triangular rubber sealing ring with a triangular cross section and a plastic film layer coated on the triangular rubber sealing ring, and the plastic film layer is partially coated on the triangular top end area of the rubber sealing ring. The friction force between the components is relatively small when the valve seat is in dynamic sealing, so that the phenomenon of sticking between the components is not easy to generate; and the sealing effect is better.
Description
Technical Field
The utility model relates to the technical field of valve seats, in particular to a valve seat for an antifriction ball valve.
Background
With the gradual wide popularization of natural gas in the industry and civilian use, the oil and gas industry is continuously and rapidly developed, and the mining and pipeline transportation engineering becomes an important link in construction, wherein valves for controlling the passing and blocking functions of media are largely used, and the quality and the stability of large-size high-pressure ball valves in long-distance pipeline transportation are particularly important. The main seal of the ball valve is the seal between the ball body and the valve body, and the seal is mainly realized by a sealing valve seat. Rubber materials are widely applied to valve sealing, but when a sealing surface of a rubber sealing ring contacts with a sealing component, particularly when the sealing surface of the rubber sealing ring is in dynamic sealing, the friction force between the components is large, the phenomenon of sticking between the components is easy to generate, a valve switch needs large mechanical torque when rotating, the phenomenon of shaking or shaking is often generated, and the service life of equipment is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a valve seat for an antifriction ball valve, aiming at solving the technical problems that the friction force between components is large and the sticking phenomenon between the components is easy to generate when the valve seat is in dynamic sealing in the prior art, and the sealing effect of the valve seat is not ideal.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a valve seat for an antifriction ball valve is arranged between a valve body and a ball body, one side of the valve seat is a valve body contact surface, the other side of the valve seat is a ball body contact surface, a first sealing ring, a second sealing ring and a pre-tightening spring are sequentially arranged on the valve body contact surface, and a third sealing ring and a support ring are sequentially arranged on the ball body contact surface; the first sealing ring is an O-shaped rubber sealing ring, the first sealing ring is in close contact with the valve body and seals, the second sealing ring is an O-shaped rubber sealing ring, and the second sealing ring is in close contact with the valve body and seals; the third sealing ring is in close contact with the ball body and is sealed, the third sealing ring comprises a triangular rubber sealing ring with a triangular cross section and a plastic film layer coated on the triangular rubber sealing ring, and the plastic film layer is partially coated on the triangular top end area of the rubber sealing ring.
Further, the third sealing ring is a fluororubber sealing ring, a hydrogenated nitrile rubber sealing ring, a tetrafluoroethylene-propylene rubber sealing ring or a perfluoro-ether rubber sealing ring; the plastic film layer is a modified polytetrafluoroethylene fluoroplastic film layer.
Furthermore, the third sealing ring and the support ring are in contact with each other.
Further, the first sealing ring and the second sealing ring are both fluororubber sealing rings, hydrogenated nitrile rubber sealing rings, tetrafluoroethylene-propylene rubber or perfluoro-ether rubber sealing rings.
Furthermore, a check ring is arranged outside the second sealing ring; the plastic retainer ring is a polytetrafluoroethylene plastic retainer ring.
Furthermore, the support ring is a plastic support ring, and further, the plastic support ring is a glass fiber reinforced nylon support ring.
Furthermore, a fire collar is arranged on the contact surface of the valve body.
Compared with the prior art, the valve seat for the antifriction ball valve provided by the utility model has the advantages that the triangular rubber sealing ring is used as the material for coating the inner core of the third sealing ring, so that excellent elasticity is provided, the outer coating layer is made of the modified polytetrafluoroethylene plastic layer, so that excellent chemical medium resistance and wear resistance can be provided, and the bearing pressure of the sealing ring is enhanced by the solid rubber sealing ring. According to the utility model, the polytetrafluoroethylene film with excellent wear resistance and self-lubricating property is compounded on the main sealing surface of the triangular rubber sealing ring, so that when the sealing surface contacts with the sealing part, the phenomenon of sticking among the parts is not easy to occur, especially the friction force among the parts is small during dynamic sealing, the mechanical torque required by the rotating part is greatly reduced, the miniaturization of an actuating mechanism is facilitated, and the manufacturing cost of equipment is further reduced. In addition, the main sealing surface or the sealing point of the triangular sealing element is the triangular top end area of the triangular sealing ring, the sealing surface is easier to form under pressure in the sealing process, the extrusion and shearing damage is smaller, and the sealing effect of the triangular rubber sealing ring is ensured. Finally, the first sealing ring and the first sealing ring are arranged simultaneously and are O-shaped rubber sealing rings, the whole structure is simple, the dismounting is convenient, the sealing rings can be repeatedly used, the requirements on the machining precision and the roughness of the valve are low, the manufacturing cost is reduced, and the production efficiency of valve manufacturing enterprises is greatly improved.
Drawings
FIG. 1 is a schematic structural view of a valve seat for an antifriction ball valve provided in the present invention;
fig. 2 is a schematic structural diagram of a third seal ring provided in the present invention.
Description of the drawings: 1. a first seal ring; 2. a second seal ring; 3. a retainer ring; 4. a fire collar; 5. pre-tightening the spring; 6. a support ring; 7. a third seal ring; 8. a valve body; 9. a valve seat; 9a, a valve body contact surface; 9b, a sphere contact surface; 10. a sphere.
Detailed Description
The utility model aims to provide a valve seat for an antifriction ball valve, which aims to solve the technical problems that in the prior art, the friction force between components is large and the sticking phenomenon between the components is easy to generate when the valve seat is in dynamic sealing, and the sealing effect of the valve seat is not ideal.
In order that those skilled in the art will be better able to understand the present invention, the following detailed description of the utility model is given in conjunction with the accompanying drawings.
As shown in fig. 1, the valve seat 9 for the antifriction ball valve is installed between a valve body 8 and a ball 10, one side of the valve seat is a valve body contact surface 9a, the other side of the valve seat is a ball contact surface 9b, a first sealing ring 1, a second sealing ring 2 and a pre-tightening spring 5 are sequentially arranged on the contact surface of the valve body 8, and a third sealing ring 7 and a support ring 6 are sequentially arranged on the contact surface of the ball 10; the first sealing ring 1 is an O-shaped rubber sealing ring, the first sealing ring 1 is tightly contacted with the valve body 8 and is sealed, the second sealing ring 2 is an O-shaped rubber sealing ring, and the second sealing ring is tightly contacted with the valve body 8 and is sealed; the third sealing ring 7 is closely contacted with the ball body 10 and sealed, as shown in fig. 2, the third sealing ring 7 comprises a triangular rubber sealing ring with a triangular cross section and a plastic film layer coated on the triangular rubber sealing ring, and the plastic film layer is partially coated on the triangular top end area of the rubber sealing ring.
In the embodiment shown in fig. 2, the third seal ring 7 is a fluoro-rubber seal ring, a hydrogenated nitrile-butadiene rubber seal ring, a tetrapropyl-fluoro-rubber seal ring, or a perfluoro-ether rubber seal ring; the plastic film layer is a modified polytetrafluoroethylene fluoroplastic film layer; graphite or carbon fiber modified teflon fluoroplastic film layer may be preferably added. The third seal ring 7 and the support ring 6 are in contact with each other.
In the embodiment shown in fig. 1, a sealing groove is formed in a valve seat, a first sealing ring 1 and a second sealing ring 2 are arranged in the groove, a gap is left between the sealing rings and the groove to provide a containing space for the sealing rings to deform, and the first sealing ring 1 and the second sealing ring 2 are both a fluorine rubber sealing ring, a hydrogenated nitrile rubber sealing ring, a tetrafluoroethylene-propylene rubber sealing ring or a perfluoro-ether rubber sealing ring; a retainer ring 3 is arranged outside the second sealing ring 2; the plastic check ring is a polytetrafluoroethylene plastic check ring, and in a specific embodiment, the check ring 3 is a polytetrafluoroethylene plastic check ring selectively added with carbon fiber reinforcement or glass fiber reinforcement.
In the embodiment shown in fig. 1, the support ring 6 is a plastic support ring 6, and the plastic support ring 6 may be a nylon support ring, or a carbon fiber or glass fiber reinforced nylon support ring, or a polyoxymethylene plastic, polytetrafluoroethylene, carbon fiber or glass fiber reinforced polytetrafluoroethylene support ring.
In the embodiment shown in fig. 1, the fire collar 4 is further arranged on the contact surface of the valve body 8; the fireproof filler adopted by the fire collar can be selected from flexible graphite filler.
The valve seat for the antifriction ball valve provided by the utility model is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and central concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a disk seat for antifriction ball valve, its installs between valve body and spheroid, and one side is the valve body contact surface, and the opposite side is the spheroid contact surface, its characterized in that: a first sealing ring, a second sealing ring and a pre-tightening spring are sequentially arranged on the contact surface of the valve body, and a third sealing ring and a support ring are sequentially arranged on the contact surface of the ball body; the first sealing ring is an O-shaped rubber sealing ring, the first sealing ring is in close contact with the valve body and seals, the second sealing ring is an O-shaped rubber sealing ring, and the second sealing ring is in close contact with the valve body and seals; the third sealing ring is in close contact with the ball body and is sealed, the third sealing ring comprises a triangular rubber sealing ring with a triangular cross section and a plastic film layer coated on the triangular rubber sealing ring, and the plastic film layer is partially coated on the triangular top end area of the rubber sealing ring.
2. A valve seat for a friction reducing ball valve as defined in claim 1, wherein: the third sealing ring is a fluororubber sealing ring, a hydrogenated nitrile rubber sealing ring, a tetrapropylene fluororubber sealing ring or a perfluoroether rubber sealing ring; the plastic film layer is a modified polytetrafluoroethylene fluoroplastic film layer.
3. A seat for a friction reducing ball valve as claimed in claim 1 or claim 2 wherein: the third sealing ring and the support ring are in contact with each other.
4. A valve seat for a friction reducing ball valve as defined in claim 1, wherein: the first sealing ring and the second sealing ring are both fluororubber sealing rings, hydrogenated nitrile-butadiene rubber sealing rings, tetrafluoroethylene-propylene rubber or perfluoro-ether rubber sealing rings.
5. A valve seat for a friction reducing ball valve as defined in claim 1, wherein: a check ring is arranged outside the second sealing ring; the check ring is made of polytetrafluoroethylene plastic.
6. A valve seat for a friction reducing ball valve as defined in claim 1, wherein: the support ring is a plastic support ring.
7. A valve seat for a friction reducing ball valve as defined in claim 1, wherein: and the contact surface of the valve body is also provided with a fire collar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122597232.8U CN216279520U (en) | 2021-10-27 | 2021-10-27 | Valve seat for antifriction ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122597232.8U CN216279520U (en) | 2021-10-27 | 2021-10-27 | Valve seat for antifriction ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216279520U true CN216279520U (en) | 2022-04-12 |
Family
ID=81072448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122597232.8U Active CN216279520U (en) | 2021-10-27 | 2021-10-27 | Valve seat for antifriction ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216279520U (en) |
-
2021
- 2021-10-27 CN CN202122597232.8U patent/CN216279520U/en active Active
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