CN213242896U - High-temperature-resistant bidirectional pressure-bearing sealing plug - Google Patents
High-temperature-resistant bidirectional pressure-bearing sealing plug Download PDFInfo
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- CN213242896U CN213242896U CN202022097714.2U CN202022097714U CN213242896U CN 213242896 U CN213242896 U CN 213242896U CN 202022097714 U CN202022097714 U CN 202022097714U CN 213242896 U CN213242896 U CN 213242896U
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Abstract
The utility model discloses a two-way pressure-bearing sealing plug of high temperature resistant, including inner conductor, ceramic insulation bush and metal insert, the ceramic insulation bush cup joints on the inner conductor, the metal insert cup joints on the ceramic insulation bush. The utility model discloses a high temperature nickel base alloy metal insert pressure-bearing, the ceramic insulation bush solves insulating mode, has guaranteed the reliable sealing plug of pressure-bearing under the less volume, has delayed the life of sealing plug.
Description
Technical Field
The utility model relates to a pressure-bearing sealing plug, in particular to high temperature resistant two-way pressure-bearing sealing plug.
Background
The high-temperature high-pressure sealing plug is a connector for providing electrical connection between oil and gas downhole electronic modules, and when the connector is exposed to high-temperature and high-pressure environments, mechanical failure and electrical failure often occur, the mechanical failure is usually melting or mechanical deformation, and the electrical failure is mainly contact failure caused by periodic mechanical stress and the like. The high temperature and high pressure sealing plug is used as a connector for connecting electronic modules in a severe environment, can bear extremely high pressure and temperature, and can be exposed to a chemically aggressive environment. In recent years, due to the development trend of miniaturization and modularization of oil detection equipment, the size of a welding end of a sealing plug is shorter and shorter, the traditional sealing plug structure is that a shell and an inner conductor are subjected to pressure bearing insulation through an insulating layer, but in the structure, when the shell and the inner conductor are cooled in plastic packaging, plastic is filled and shrunk due to inconsistent heat conduction, a hollow is formed in the shell, the sealing performance is very poor, and secondly, due to the fact that a welding wire cup is close to the insulating layer, welding heat is applied in welding wires, and the insulating layer is easy to deform or even melt; and because the contact area between the pressure bearing surface of the traditional sealing plug and equipment becomes very small, when the traditional sealing plug is impacted at high temperature and high pressure, the sealing plug becomes unstable, so that shearing occurs, and axial displacement occurs, so that the connection fails.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a two-way pressure-bearing sealing plug of high temperature resistant.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model discloses a two-way pressure-bearing sealing plug of high temperature resistant, including inner conductor, ceramic insulation bush and metal insert, the ceramic insulation bush cup joints on the inner conductor, the metal insert cup joints on the ceramic insulation bush.
Preferably, the cable further comprises a plastic package body, and the plastic package body is in plastic package on the inner conductor.
Preferably, the plastic package body is uniformly distributed between the metal insert and the inner conductor.
Preferably, the ceramic insulation bushing comprises a structural ceramic bushing and a positioning ceramic bushing, and a sealing glass sleeve is arranged between the structural ceramic bushing and the positioning ceramic bushing.
Preferably, the metal insert is made of a nickel-based alloy material, a step structure is arranged in the metal insert, and the inner diameter of one end, close to the plastic package body, of the metal insert is smaller than that of the other end of the metal insert.
Preferably, one end of the metal insert, which is close to the plastic package body, is provided with a tooth-shaped structure and an inverted buckle structure.
Compared with the prior art, the utility model has the advantages of: the utility model ensures the reliable bearing sealing plug with smaller volume and prolongs the service life of the sealing plug by the way that the high temperature nickel base alloy metal insert bears pressure and the ceramic insulation bush solves insulation; through the structure of plastic package after ceramic and glass are sealed, the sealing performance of the sealing plug is solved by the sealing performance of the glass, the problem that the sealing plug is damaged by welding temperature transmission is solved by the high-temperature performance of the ceramic, and the structure also has a pressure bearing effect due to the pressure resistance of the ceramic and the glass.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, the high temperature resistant bidirectional pressure-bearing sealing plug of the present invention comprises an inner conductor 1, a ceramic insulating bush 2, a metal insert 3 and a plastic package body 4, the ceramic insulation bush 2 is sleeved on the inner conductor 1, the metal insert 3 is sleeved on the ceramic insulation bush 2, the plastic package body 4 is sleeved on the inner conductor 1, the plastic package body 4 is uniformly distributed between the metal insert 3 and the inner conductor 1, the ceramic insulating bush 2 comprises a structural ceramic bush 21 and a positioning ceramic bush 22, a sealing glass sleeve 23 is arranged between the structural ceramic bush 21 and the positioning ceramic bush 22, the metal insert 3 is made of nickel-based alloy, and a step structure is arranged in the metal insert 3, the inner diameter of one end of the metal insert 3 close to the plastic package body 4 is smaller than that of the other end, and a tooth-shaped structure and a back-off structure are arranged at one end of the metal insert 3 close to the plastic package body 4.
During assembly, the positioning ceramic bushing 22 and the inner conductor 1 are firstly arranged in the metal insert 3, then the sealing glass sleeve 23 and the structural ceramic bushing 21 are sequentially arranged, at a proper sealing temperature (900-, under the pressure applied to the structural ceramic bushing 21, part of the sintered sealing glass sleeve 23 is immersed in the gap between the ceramic insulating bushing 2 and the metal insert 3, so that the sealing glass sleeve 23 is more compact and firm, and meanwhile, the sealing glass sleeve 23 also plays a role in sealing, insulating and bearing pressure.
The inner hole of the metal insert 3 is provided with steps, the inner hole is used for axial positioning during sintering, final smaller pressure (most of pressure is absorbed by ceramic and glass) transmitted to the inner hole from the outside is simultaneously removed, gaps are formed between the structural ceramic bushing 21 and the positioning ceramic bushing 22 and the inner wall of the metal insert 3, and the inner hole is used for sealing the glass sleeve 23 to climb a part of distance to wrap the ceramic after the glass with large expansion coefficient is melted under certain external pressure during sintering, so that the ceramic and the glass are bonded more firmly, and the insulation performance is better; in order to increase the adhesive force of the plastic package body 4 to the metal insert 3, a tooth-shaped structure and a reversed buckle structure are arranged in the metal insert 3 close to the plastic package body 4, the structural ceramic bushing 21 and the positioning ceramic bushing 22 both adopt zirconia ceramics, one end of the sealing plug adopts ceramics and pressure-bearing glass to bear pressure, and the other end of the sealing plug adopts a plastic package body 4PEEK insulating layer to bear pressure, so that the purpose of bidirectional pressure bearing is achieved.
Claims (4)
1. The utility model provides a two-way pressure-bearing sealing plug of high temperature resistant which characterized in that: the plastic package structure comprises an inner conductor, a ceramic insulation bushing, a plastic package body and a metal insert, wherein the ceramic insulation bushing is sleeved on the inner conductor, and the metal insert is sleeved on the ceramic insulation bushing; the plastic package body is plastically packaged on the inner conductor; the plastic package bodies are uniformly distributed between the metal insert and the inner conductor.
2. The high-temperature resistant bidirectional pressure-bearing sealing plug of claim 1, wherein: the ceramic insulation bushing comprises a structural ceramic bushing and a positioning ceramic bushing, and a sealing glass sleeve is arranged between the structural ceramic bushing and the positioning ceramic bushing.
3. The high-temperature resistant bidirectional pressure-bearing sealing plug of claim 1, wherein: the metal insert is made of a nickel-based alloy material, a step structure is arranged in the metal insert, and the inner diameter of one end, close to the plastic package body, of the metal insert is smaller than that of the other end of the metal insert.
4. A high temperature resistant bidirectional pressure bearing sealing plug as claimed in claim 1 or 3, wherein: and a tooth-shaped structure and a back-off structure are arranged at one end of the metal insert close to the plastic package body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022097714.2U CN213242896U (en) | 2020-09-23 | 2020-09-23 | High-temperature-resistant bidirectional pressure-bearing sealing plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022097714.2U CN213242896U (en) | 2020-09-23 | 2020-09-23 | High-temperature-resistant bidirectional pressure-bearing sealing plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213242896U true CN213242896U (en) | 2021-05-18 |
Family
ID=75875573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022097714.2U Active CN213242896U (en) | 2020-09-23 | 2020-09-23 | High-temperature-resistant bidirectional pressure-bearing sealing plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213242896U (en) |
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2020
- 2020-09-23 CN CN202022097714.2U patent/CN213242896U/en active Active
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