CN216200781U - Valve seat for low-temperature ball valve - Google Patents
Valve seat for low-temperature ball valve Download PDFInfo
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- CN216200781U CN216200781U CN202122596935.9U CN202122596935U CN216200781U CN 216200781 U CN216200781 U CN 216200781U CN 202122596935 U CN202122596935 U CN 202122596935U CN 216200781 U CN216200781 U CN 216200781U
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- valve
- ring
- valve body
- rubber sealing
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Abstract
The utility model discloses a valve seat for a low-temperature ball valve. This disk seat is installed between valve body and spheroid, and one side is the valve body contact surface, and the opposite side is spheroid contact surface, its characterized in that: the valve body contact surface is sequentially provided with a sealing ring and a pre-tightening spring, the sealing ring is in contact with the valve body and seals the valve body, and the sealing ring comprises a rubber sealing ring and a plastic O-shaped coating ring coated on the rubber sealing ring; the rubber sealing ring is a silicon rubber sealing ring, and the plastic O-shaped coating ring is a polytetrafluoroethylene O-shaped coating ring. The valve seat has the advantages of simple structure, extremely high requirements on the machining precision and the roughness of the valve, repeated disassembly and assembly, and better low-temperature resistance.
Description
Technical Field
The utility model relates to the technical field of valve seats, in particular to a valve seat for a low-temperature 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.
The rubber material is widely applied to valve sealing, but the low-temperature resistance of the rubber material is limited, most of rubber cannot meet the sealing environment at the temperature of lower than-60 ℃, the silicone rubber has excellent low-temperature resistance, particularly the low temperature of the phenyl silicone rubber can reach-120 ℃, but the mechanical property of the silicone rubber is low, the tear resistance and the shear resistance are poor, and the silicone rubber cannot be used independently. For a low-temperature environment with the temperature lower than-60 ℃, lip-shaped sealing rings (also called pre-tightening spring energy storage rings, see lip-shaped sealing ring 8 in the attached drawing 1 for details) are generally selected in the existing valve sealing technology, but the lip-shaped sealing rings are complex in structure, have extremely high requirements on the machining precision and the roughness of the valve, cannot be repeatedly disassembled and assembled for use, and bring great troubles to valve manufacturing enterprises.
SUMMERY OF THE UTILITY MODEL
The utility model provides a valve seat for a low-temperature ball valve, which aims to solve the technical problems that the valve seat in the prior art is poor in low-temperature resistance, cannot be repeatedly disassembled and assembled for use and the like.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a valve seat for a low-temperature 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 sealing ring and a pre-tightening spring are sequentially arranged on the valve body contact surface, the sealing ring is in contact with the valve body and seals, and the sealing ring comprises a rubber sealing ring and a plastic O-shaped coating ring coated on the rubber sealing ring; the rubber sealing ring is a silicon rubber sealing ring, and the plastic O-shaped coating ring is a polytetrafluoroethylene O-shaped coating ring.
Further, the silicon rubber sealing ring is a phenyl silicon rubber sealing ring; the Shore A hardness value of the phenyl silicone rubber sealing ring is 50-80.
Furthermore, a support ring is arranged on the contact surface of the valve body, and the support ring is tightly contacted with the ball body and is sealed.
Furthermore, the support ring is a polychlorotrifluoroethylene support ring or a polyimide support ring.
Compared with the prior art, the valve seat for the low-temperature ball valve provided by the utility model has the advantages that the silicon rubber is used as a core material, particularly the phenyl silicon rubber with the hardness of 50-80 Shore A, the polytetrafluoroethylene with excellent wear resistance and self-lubricating property is used as an O-shaped ring of the coating layer, and the low-temperature resistance of the O-shaped ring can reach-120 ℃. Rubber seal and cladding are in plastics O shape cladding circle on the rubber seal, overall structure is simple, and easy dismounting, sealing washer can used repeatedly, and is lower to valve machining precision and roughness requirement, has reduced manufacturing cost, has also improved the production efficiency of valve manufacturing enterprise greatly.
Drawings
FIG. 1 is a schematic structural diagram of a valve seat for a prior art ball valve;
fig. 2 is a schematic structural diagram of a valve seat for a cryogenic ball valve provided by the utility model.
Detailed Description
The utility model aims to provide a valve seat for a low-temperature ball valve, and aims to solve the technical problems that the valve seat in the prior art is poor in low-temperature resistance and cannot be repeatedly disassembled, assembled and used.
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. 2, a valve seat 4 for a low-temperature ball valve is installed between a valve body 3 and a ball body 5, one side of the valve seat is a valve body contact surface 4a, the other side of the valve seat is a ball body contact surface 4b, a sealing ring 1 and a pre-tightening spring 6 are sequentially arranged on the valve body contact surface 4a, the sealing ring 1 contacts and seals the valve body 3, and the sealing ring 1 comprises a rubber sealing ring and a plastic O-shaped coating ring coated on the rubber sealing ring; the rubber sealing ring is a silicon rubber sealing ring, and the plastic O-shaped coating ring is a polytetrafluoroethylene O-shaped coating ring.
In the embodiment shown in fig. 2, a sealing groove is formed in the valve seat, a sealing ring 1 is arranged in the groove, a gap is reserved between the sealing ring 1 and the groove to provide a containing space for the sealing ring to deform, and the sealing ring 1 is a phenyl silicone rubber sealing ring; the Shore A hardness value of the phenyl silicone rubber sealing ring is 50-80.
In the embodiment shown in fig. 2, the valve body contact surface 4b is provided with a support ring 2, and the support ring 2 is tightly contacted with the ball and sealed. In a preferred embodiment, the support ring is a polychlorotrifluoroethylene support ring or a polyimide support ring.
The utility model adopts the sealing ring 1 with a specific structure to replace a lip-shaped sealing ring 8 (see figure 1) in the prior art, greatly reduces the requirements on the machining precision and the roughness of the valve, has simple integral structure and convenient disassembly and assembly, can be repeatedly used, and greatly improves the production efficiency of valve manufacturing enterprises. And the low temperature resistance of the valve seat can reach-120 ℃.
The valve seat for the low-temperature 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 (4)
1. The utility model provides a disk seat for low temperature 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: the valve body contact surface is sequentially provided with a sealing ring and a pre-tightening spring, the sealing ring is in contact with the valve body and seals the valve body, and the sealing ring comprises a rubber sealing ring and a plastic O-shaped coating ring coated on the rubber sealing ring; the rubber sealing ring is a silicon rubber sealing ring, and the plastic O-shaped coating ring is a polytetrafluoroethylene O-shaped coating ring.
2. The valve seat for a cryogenic ball valve according to claim 1, wherein: the silicone rubber sealing ring is a phenyl silicone rubber sealing ring; the Shore A hardness value of the phenyl silicone rubber sealing ring is 50-80.
3. The valve seat for a cryogenic ball valve according to claim 1, wherein: and a support ring is arranged on the contact surface of the valve body and is tightly contacted with the ball body and sealed.
4. The valve seat for a cryogenic ball valve according to claim 3, wherein: the support ring is a polychlorotrifluoroethylene support ring or a polyimide support ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122596935.9U CN216200781U (en) | 2021-10-27 | 2021-10-27 | Valve seat for low-temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122596935.9U CN216200781U (en) | 2021-10-27 | 2021-10-27 | Valve seat for low-temperature ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216200781U true CN216200781U (en) | 2022-04-05 |
Family
ID=80891135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122596935.9U Active CN216200781U (en) | 2021-10-27 | 2021-10-27 | Valve seat for low-temperature ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216200781U (en) |
-
2021
- 2021-10-27 CN CN202122596935.9U patent/CN216200781U/en active Active
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