An insulating sealing gasket for high temperature and high pressure environment

Abstract

The utility model discloses an insulation sealing gasket for high temperature and high pressure environment belongs to sealing gasket technical field. An insulation sealing gasket for high temperature and high pressure environment includes: the ceramic matrix of annular and the transition layer, copper base layer and silver plating layer of symmetrical setting gradually on both sides of ceramic matrix. The insulation sealing gasket for high temperature and high pressure environment of the utility model can realize temperature 300 450, and the sealing and insulation of pressure 4.5MPa gas, liquid, solved the problem that traditional sealing gasket can not realize high temperature resistance, high pressure resistance, insulation function simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of sealing gasket technology, specifically to an insulating sealing gasket for use in high temperature and high pressure environments. Background Technology

[0002] In certain high-temperature and high-pressure equipment applications, there is a need for structural sealing. These structures often require high temperature resistance, pressure resistance, and insulation. Traditional common sealing gaskets are usually made of materials such as rubber, PEEK, and PEKK to form O-rings and flat gaskets, which can achieve pressure resistance and insulation. However, the maximum operating temperature of these materials is generally <300℃, and higher temperatures will cause seal failure. Metal gaskets, graphite spiral wound gaskets, or other metal O-rings can withstand high temperatures and pressures, but their conductive properties do not meet insulation requirements. Gaskets made of inorganic materials such as ceramics and silicon nitride can meet insulation and high temperature resistance requirements, but they require high manufacturing precision for the sealing surface and sealing groove, are difficult to process, and are prone to cracking due to the high elastic modulus of the material. Utility Model Content

[0003] The purpose of this invention is to provide an insulating gasket for use in high temperature and high pressure environments, so as to solve the problem that existing gaskets cannot simultaneously meet the requirements of high temperature, pressure resistance and insulation.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] An insulating sealing gasket for use in high temperature and high pressure environments includes: an annular ceramic substrate and a stepped transition layer, a copper base layer, and a silver plating layer arranged symmetrically on both sides of the ceramic substrate.

[0006] Furthermore, a connecting portion is provided on the outer side of the ceramic substrate, making the ceramic substrate T-shaped, and the connecting portion is connected to the copper base layer.

[0007] Furthermore, the ceramic substrate and the stepped transition layer, the connecting part and the copper base layer, and the stepped transition layer and the copper base layer are all connected by vacuum brazing.

[0008] Furthermore, the aforementioned ceramic matrix is ​​a silicon carbide matrix.

[0009] Furthermore, the aforementioned stepped transition layer includes a high expansion coefficient layer, an intermediate transition layer, and a low expansion coefficient layer arranged sequentially; the high expansion coefficient layer is connected to the copper base layer, and the low expansion coefficient layer is connected to the ceramic substrate.

[0010] Furthermore, the aforementioned stepped transition layer is made of copper-tungsten composite material.

[0011] Furthermore, the material of the aforementioned copper base layer is copper.

[0012] Furthermore, the thickness of the aforementioned silver plating layer is 0.12 mm to 0.13 mm.

[0013] This utility model has the following beneficial effects:

[0014] The insulating sealing gasket of this invention for high temperature and high pressure environments can achieve sealing and insulation of gases and liquids at temperatures of 300℃~450℃ and pressures ≤4.5MPa, solving the problem that traditional sealing gaskets cannot simultaneously achieve high temperature resistance, high pressure resistance, and insulation functions. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an insulating sealing gasket for use in high temperature and high pressure environments, provided as an embodiment of the present invention.

[0016] In the figure: 10-Ceramic substrate; 11-Connector; 20-Step transition layer; 30-Copper base layer; 40-Silver plating layer. Detailed Implementation

[0017] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0018] like Figure 1 As shown, this embodiment provides an insulating sealing gasket for use in high temperature and high pressure environments, including a ceramic substrate 10, a stepped transition layer 20, a copper base layer 30, and a silver plating layer 40. The ceramic substrate 10 is annular, with the stepped transition layer 20, the copper base layer 30, and the silver plating layer 40 sequentially arranged on both sides.

[0019] Preferably, a connecting portion 11 is provided on the outer side of the ceramic substrate 10, making the ceramic substrate 10 T-shaped, and the connecting portion 11 extends to the outer side of the copper base layer 30 and connects with the copper base layer 30.

[0020] Preferably, the stepped transition layer 20 includes a high expansion coefficient layer, an intermediate transition layer and a low expansion coefficient layer arranged sequentially; the high expansion coefficient layer is connected to the copper base layer 30 and the low expansion coefficient layer is connected to the ceramic substrate 10.

[0021] In this embodiment, the ceramic substrate 10 and the stepped transition layer 20, the connecting part 11 and the copper base layer 30, and the stepped transition layer 20 and the copper base layer 30 are all connected by vacuum brazing.

[0022] In this embodiment, the ceramic substrate 10 is a silicon carbide substrate; the high expansion coefficient layer, the intermediate transition layer and the low expansion coefficient layer are made of nickel, WCu30 and WCu7 respectively; the copper base layer 30 is made of copper; and the thickness of the silver plating layer 40 is 0.12mm to 0.13mm.

[0023] The insulating gasket of this embodiment for high temperature and high pressure environments can achieve sealing and insulation of gases and liquids at temperatures of 300℃~450℃ and pressures ≤4.5MPa, solving the problem that traditional gaskets cannot simultaneously achieve high temperature resistance, high pressure resistance, and insulation functions.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An insulating sealing gasket for use in high temperature and high pressure environments, characterized in that, include: The ceramic substrate (10) is in the shape of a ring and the stepped transition layer (20), the copper base layer (30) and the silver plating layer (40) are arranged symmetrically on both sides of the ceramic substrate (10).

2. The insulating sealing gasket for high temperature and high pressure environments according to claim 1, characterized in that, The ceramic substrate (10) is provided with a connecting part (11) on the outside, so that the ceramic substrate (10) is T-shaped, and the connecting part (11) is connected to the copper base layer (30).

3. The insulating sealing gasket for high temperature and high pressure environments according to claim 2, characterized in that, The ceramic substrate (10) and the stepped transition layer (20), the connecting part (11) and the copper base layer (30), and the stepped transition layer (20) and the copper base layer (30) are all connected by vacuum brazing.

4. The insulating sealing gasket for high temperature and high pressure environments according to claim 1, characterized in that, The ceramic matrix (10) is a silicon carbide matrix.

5. The insulating sealing gasket for high temperature and high pressure environments according to claim 1, characterized in that, The stepped transition layer (20) includes a high expansion coefficient layer, an intermediate transition layer and a low expansion coefficient layer arranged sequentially; the high expansion coefficient layer is connected to the copper base layer (30) and the low expansion coefficient layer is connected to the ceramic substrate (10).

6. The insulating sealing gasket for high temperature and high pressure environments according to claim 1, characterized in that, The stepped transition layer (20) is made of copper-tungsten composite material.

7. The insulating sealing gasket for high temperature and high pressure environments according to claim 1, characterized in that, The copper base layer (30) is made of copper.

8. The insulating sealing gasket for high temperature and high pressure environments according to claim 1, characterized in that, The thickness of the silver plating layer (40) is 0.12 mm to 0.13 mm.

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