CN213242895U

CN213242895U - High-reliability bidirectional pressure-bearing sealing plug

Info

Publication number: CN213242895U
Application number: CN202022097665.2U
Authority: CN
Inventors: 吴旭娇; 刘向阳; 余睿; 沈靖舒; 黄婉秋; 吴浪
Original assignee: Chengdu Hongming Electronics Co Ltd
Current assignee: Chengdu Hongming Electronics Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-05-18
Anticipated expiration: 2030-09-23

Abstract

The utility model discloses a two-way pressure-bearing sealing plug of high reliability, including inner conductor, ceramic insulation bush and metal insert, the ceramic insulation bush cup joints on the inner conductor, 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

High-reliability bidirectional pressure-bearing sealing plug

Technical Field

The utility model relates to a pressure-bearing sealing plug, in particular to two-way pressure-bearing sealing plug of high reliability.

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 novel structure, the volume is less, the high reliable two-way pressure-bearing sealing plug of long service life.

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 reliability, 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, one end of the plastic package body, which is close to the metal insert, is plastically packaged on the metal insert.

Preferably, the cable also comprises a PEEK plastic sleeve which is sleeved on the inner conductor, and one end of the PEEK plastic sleeve, which is close to the metal insert, is plastically molded on the metal insert.

Preferably, the PEEK plastic sleeve is sleeved on the end part of the metal insert and is provided with a sealing ring.

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.

Compared with the prior art, the utility model has the advantages of: 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.

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 utility model discloses a two-way pressure-bearing sealing plug of high reliability, including inner conductor 1, ceramic-insulated bush 2, metal insert 3 and plastic-sealed body 4 and PEEK plastic sheath 5, ceramic-insulated bush 2 cup joints on inner conductor 1, metal insert 3 cup joints on ceramic-insulated bush 2, plastic-sealed body 4 plastic-sealed on inner conductor 1, the one end plastic envelope that plastic-sealed body 4 is close to metal insert 3 is on metal insert 3, and PEEK plastic sheath 5 cup joints on inner conductor 1, and PEEK plastic sheath 5 is close to the one end plastic envelope of metal insert 3 on metal insert 3, PEEK plastic sheath 5 cup joints the tip at metal insert 3 and is provided with sealing washer 6, metal insert 3 adopts the nickel base alloy material, and is provided with the stair structure in the metal insert 3, and the one end internal diameter that metal insert 3 is close to plastic-sealed body 4 is less than the other end internal diameter.

In the embodiment, the surface of the inner conductor 1 and the inner and outer surfaces of the ceramic insulating bush 2 are both provided with step structures, the inner conductor 1 is of a revolving body structure, and the inner conductor 1 is provided with a section of tooth-shaped structure and has step structures with different diameters; during the assembly, 2 cover ceramic insulation bush on inner conductor 1, realize axial positioning after the step of

inner conductor

1 and 2 terminal surface contacts of ceramic insulation bush, then overlap metal insert 3 on ceramic insulation bush 2, realize axial positioning after the step of 3 holes of metal insert and the 2 outer fringe steps contact of ceramic insulation bush, inner conductor 1, metal insert 3 and ceramic insulation bush 2 are adorned, 2 both ends sizes of ceramic insulation bush need exceed metal insert 3, just can reach the insulation.

Claims

1. The utility model provides a two-way pressure-bearing sealing plug of high reliability 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; and one end of the plastic package body, which is close to the metal insert, is plastically packaged on the metal insert.

2. The high-reliability bidirectional pressure-bearing sealing plug of claim 1, wherein: the PEEK plastic sleeve is sleeved on the inner conductor, and one end, close to the metal insert, of the PEEK plastic sleeve is plastically packaged on the metal insert.

3. The high-reliability bidirectional pressure-bearing sealing plug of claim 2, wherein: and the PEEK plastic sleeve is sleeved at the end part of the metal insert and is provided with a sealing ring.

4. The high-reliability 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.