CN211951504U - Double-piston effect lip-shaped sealing valve seat assembly - Google Patents
Double-piston effect lip-shaped sealing valve seat assembly Download PDFInfo
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- CN211951504U CN211951504U CN202020203406.0U CN202020203406U CN211951504U CN 211951504 U CN211951504 U CN 211951504U CN 202020203406 U CN202020203406 U CN 202020203406U CN 211951504 U CN211951504 U CN 211951504U
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Abstract
The utility model relates to a double-piston effect lip seal valve seat subassembly, including valve body and spheroid, be equipped with mobilizable ground disk seat between valve body and spheroid, the outer wall of disk seat is equipped with first seal land and the second seal land that is the ladder and distributes, be equipped with two-way lip seal subassembly and graphite on first seal land and the second seal land respectively and pack, first seal land, an oil pocket is enclosed out to second seal land and valve body, two-way lip seal subassembly and graphite are packed all to leaning on with the valve body and form seal structure, the disk seat still is equipped with the oil filler point with the oil pocket intercommunication, two-way lip seal subassembly includes that baffle and two one-way U-shaped are packed, the baffle sets up on first seal land, two one-way U-shaped are packed and are put the both sides at the baffle with the form branch back to back. The double-piston-effect lip-shaped sealing valve seat assembly is reasonable in structural design and good in sealing performance, meets the requirement of double-piston effect, and can be used under the working conditions of high temperature, low temperature and strong corrosivity.
Description
Technical Field
The utility model relates to a ball valve technical field, in particular to double-piston effect lip seal valve holder subassembly.
Background
In some cases, the fixed ball valve seating assembly has a single piston effect or a dual piston effect. In a dual piston effect seat assembly, pressure from either end of the valve or from either side of the central chamber pushes the seat towards the ball, sealing. The rubber O-shaped ring is a sealing element commonly used for the valve, but when the O-shaped ring has strong corrosivity on high-temperature or low-temperature working conditions and media, the O-shaped ring is easy to lose efficacy, the sealing property and the service life of the valve are greatly influenced, and therefore the popularization of the rubber-free valve is imperative. Lip seals, however, have very good temperature properties as well as good corrosion and wear resistance, and for this reason, a valve seat assembly without an O-ring is under investigation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: to overcome the deficiencies of the prior art, a dual piston effect lip seal valve seat assembly is provided.
In order to achieve the above technical effect, the utility model discloses a technical scheme is: a lip-shaped sealing valve seat assembly with double piston effects comprises a valve body and a ball body, wherein a movable valve seat is arranged between the valve body and the ball body, a first sealing table and a second sealing table which are distributed in a stepped mode are arranged on the outer wall of the valve seat, a bidirectional lip-shaped sealing assembly and graphite packing are arranged on the first sealing table and the second sealing table respectively, an oil cavity is defined by the first sealing table, the second sealing table and the valve body, the bidirectional lip-shaped sealing assembly and the graphite packing are abutted to the valve body to form a sealing structure, and the valve seat is further provided with an oil filling hole communicated with the oil cavity;
the bidirectional lip seal assembly comprises a partition plate and two unidirectional U-shaped fillers, the partition plate is arranged on the first seal table, the two unidirectional U-shaped fillers are respectively arranged on two sides of the partition plate in a back-to-back mode, and the two unidirectional U-shaped fillers are all abutted to the valve body.
Preferably, a sealing ring is coaxially arranged on the contact surface of the valve seat and the ball body.
Preferably, the valve body is provided with a pressure spring hole, and a pressure spring for pushing the valve seat to the ball body is arranged in the pressure spring hole.
Preferably, a chamfer is arranged at the joint of the first sealing table and the second sealing table.
Preferably, an annular mounting groove is formed in the second sealing table, and the graphite packing is arranged in the mounting groove.
Preferably, the partition plate is a metal partition plate, the partition plate is annular, and the partition plate is sleeved in the middle of the first sealing table.
Compared with the prior art, the beneficial effects of the utility model are that: the double-piston-effect lip-shaped sealing valve seat assembly is reasonable in structural design and good in sealing performance, meets the requirement of double-piston effect, and can be used under the working conditions of high temperature, low temperature and strong corrosivity.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments, and it is obvious that the described embodiments are some embodiments, not all embodiments of the present invention.
Drawings
Fig. 1 is a schematic diagram of a double-piston effect lip seal valve seat assembly according to the present invention.
Fig. 2 is a schematic structural diagram of the valve seat of the present invention.
Fig. 3 is a schematic structural view of the two-way lip seal assembly of the present invention.
The reference numbers and corresponding designations in the drawings are: 1. the novel oil-gas seal valve comprises a valve body, a ball body, a valve seat, a bidirectional lip seal assembly, a graphite filler, an oil cavity, a seal ring, a pressure spring hole, a first seal table, a second seal table, an oil injection hole, a partition plate, a unidirectional U-shaped filler, a partition plate and a mounting groove, wherein the ball body is 2, the ball body is 3, the valve seat is 4, the bidirectional lip seal assembly is 5, the graphite filler is 6, the oil cavity is 7, the.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1-2, a double-piston effect lip seal valve seat 3 assembly includes a valve body 1 and a ball body 2, a movable valve seat 3 is disposed between the valve body 1 and the ball body 2, a first seal platform 31 and a second seal platform 32 which are distributed in a stepped manner are disposed on an outer wall of the valve seat 3, a bidirectional lip seal assembly 4 and a graphite packing 5 are respectively disposed on the first seal platform 31 and the second seal platform 32, an oil cavity 6 is defined by the first seal platform 31, the second seal platform 32 and the valve body 1, both the bidirectional lip seal assembly 4 and the graphite packing 5 abut against the valve body 1 to form a seal structure, and the valve seat 3 is further provided with an oil filling hole 33 communicated with the oil cavity 6;
as shown in fig. 3, the bidirectional lip seal assembly 4 includes a partition plate 41 and two unidirectional U-shaped packing 42, the partition plate 41 is disposed on the first seal table 31, the two unidirectional U-shaped packing 42 are disposed on both sides of the partition plate 41 in a back-to-back manner, and both the two unidirectional U-shaped packing 42 abut against the valve body 1.
And a sealing ring 7 is coaxially arranged on the contact surface of the valve seat 3 and the ball body 2. The sealing fit of the valve seat 3 and the ball 2 is realized by a sealing ring 7.
The valve body 1 is provided with a pressure spring hole 11, and a pressure spring 8 which pushes the valve seat 3 to the ball body 2 is arranged in the pressure spring hole 11.
The junction of the first sealing platform 31 and the second sealing platform 32 is provided with a chamfer. After the chamfer is designed, the partition plate 41 and the one-way U-shaped packing 42 are conveniently sleeved on the first sealing platform 31, and the influence on the sealing performance caused by the fact that the one-way U-shaped packing 42 is scratched by an acute angle at the joint can be avoided.
The second seal holder 32 is provided with an annular mounting groove 321, and the graphite packing 5 is disposed in the mounting groove 321. To facilitate fixing of the graphite packing 5 on the second sealing stage 32.
The partition plate 41 is a metal partition plate, the partition plate 41 is circular, and the partition plate 41 is sleeved on the middle part of the first sealing table 31. The metal separator has long service life and high structural strength.
When in specific use: the valve body 1 is arranged in an inner cavity of the valve body 1, the valve body 1 and the ball body 2 are tightly attached and sealed through the pressure spring 8, a sealed space can be formed by the valve body 1 and the first sealing platform 31, the bidirectional lip-shaped sealing assembly 4 is positioned in the sealed space, the two unidirectional U-shaped packings 42 are arranged back to back, and the partition plate 41 is arranged in the middle of the two unidirectional U-shaped packings 42, so that the unidirectional U-shaped packings 42 can play a role in sealing no matter the direction of medium pressure. The oil filling hole 33 on the valve seat 3 is connected with the oil cavity 6, so that oil can be filled in time, the abrasion of the valve seat 3 is reduced, and the graphite packing 5 on the second sealing platform 32 is used for blocking grease.
The double-piston-effect lip-shaped sealing valve seat assembly is reasonable in structural design and good in sealing performance, can meet the requirement of double-piston effect, and is used under the working conditions of high temperature, low temperature and strong corrosivity.
The present invention is not limited to the above specific embodiments, and for those skilled in the art, the above conception can be used without any creative work, and all the changes made fall within the protection scope of the present invention.
Claims (6)
1. A double-piston-effect lip-shaped sealing valve seat assembly comprises a valve body (1) and a ball body (2), and is characterized in that a movable valve seat (3) is arranged between the valve body (1) and the ball body (2), the outer wall of the valve seat (3) is provided with a first sealing platform (31) and a second sealing platform (32) which are distributed in a stepped manner, the first sealing platform (31) and the second sealing platform (32) are respectively provided with a bidirectional lip-shaped sealing assembly (4) and a graphite filler (5), the first sealing platform (31), the second sealing platform (32) and the valve body (1) enclose an oil cavity (6), the bidirectional lip-shaped sealing assembly (4) and the graphite filler (5) are abutted against the valve body (1) to form a sealing structure, and the valve seat (3) is further provided with an oil filling hole (33) communicated with the oil cavity (6);
the bidirectional lip seal assembly (4) comprises a partition plate (41) and two unidirectional U-shaped packing (42), the partition plate (41) is arranged on the first seal table (31), the two unidirectional U-shaped packing (42) are arranged on two sides of the partition plate (41) in a back-to-back mode, and the two unidirectional U-shaped packing (42) are abutted to the valve body (1).
2. The double-piston-effect lip-sealing valve seat assembly according to claim 1, wherein a sealing ring (7) is coaxially provided on the contact surface of the valve seat (3) with the ball (2).
3. The double-piston effect lip sealing valve seat assembly according to claim 2, characterized in that a pressure spring hole (11) is provided in the valve body (1), and a pressure spring (8) for urging the valve seat (3) towards the ball (2) is provided in the pressure spring hole (11).
4. The double-piston-effect lip sealing valve seat assembly according to claim 1, wherein the junction of said first sealing land (31) and said second sealing land (32) is chamfered.
5. The double-piston-effect lip sealing valve seat assembly according to claim 4, wherein said second sealing land (32) is provided with an annular mounting groove (321), and said graphite packing (5) is provided in said mounting groove (321).
6. The dual-piston-effect lip sealing valve seat assembly of claim 4, wherein said diaphragm (41) is a metal diaphragm (41), said diaphragm (41) being annular, said diaphragm (41) being nested in a middle portion of said first seal land (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020203406.0U CN211951504U (en) | 2020-02-24 | 2020-02-24 | Double-piston effect lip-shaped sealing valve seat assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020203406.0U CN211951504U (en) | 2020-02-24 | 2020-02-24 | Double-piston effect lip-shaped sealing valve seat assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211951504U true CN211951504U (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020203406.0U Active CN211951504U (en) | 2020-02-24 | 2020-02-24 | Double-piston effect lip-shaped sealing valve seat assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211951504U (en) |
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2020
- 2020-02-24 CN CN202020203406.0U patent/CN211951504U/en active Active
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