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A self-tightening disc flange sealing structure

A flange sealing and dish-shaped technology, which is applied in the field of self-tightening dish-shaped flange sealing structure, can solve the problems of high cost, introduction of redundant materials, system safety risks, etc., and achieves simple structure, low processing difficulty, easy installation and use convenient effect

Active Publication Date: 2021-01-05
BEIJING INST OF ASTRONAUTICAL SYST ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphite and indium wire sealing structures are not conducive to cleaning when replacing, and there is a risk of introducing redundant substances, which poses a safety risk to the system
The rubber-metal composite sealing structure is difficult to process and high in cost, and is generally used in pipelines with small diameters
And these sealing structures have no pressure self-tightening effect at deep low temperature, and the sealing effect decreases rapidly with the increase of sealing pressure

Method used

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  • A self-tightening disc flange sealing structure
  • A self-tightening disc flange sealing structure
  • A self-tightening disc flange sealing structure

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Embodiment Construction

[0024] see figure 1 , a self-tightening disc flange sealing structure of the present invention, comprising a convex flange 1, a concave flange 2, a disc sealing ring 3, and a fastener 4; wherein, the convex flange 1 starts from its central axis There are a central convex surface 5, a first tapered surface 6, and a first mounting surface 7 in order outwardly, and the heights are successively decreased. 9. The height of the second installation surface 10 increases sequentially; the fastener 4 passes through the first installation surface 7 and the second installation surface 10 to fasten the convex flange 1 and the concave flange 2 so that both Concave and convex are matched and have the same central axis; the first tapered surface 6 is opposite to the second tapered surface 9 and forms a closed diamond-shaped space for accommodating the disc-shaped sealing ring 3 .

[0025] The central convex surface 5 is opposite to the central concave surface 8 with a certain gap. The first...

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Abstract

The invention provides a self-tightening disc-shaped flange sealing structure. The self-tightening disc-shaped flange sealing structure comprises a convex flange, a concave flange, a disc-shaped sealing ring and a fastener; the convex flange sequentially comprises a central convex table surface, a first tapered surface and a first mounting surface from the central axis of the convex flange to theoutside according to the order from high to low; the concave flange sequentially comprises a central concave surface, a second tapered surface and a second mounting surface from the central axis of the concave flange to the outside according to the order from low to high; and the fastener penetrates through the first mounting surface and the second mounting surface to enable the convex flange andthe concave flange to be fastened and matched and to share the same center axis. The advantages of the self-tightening disc-shaped flange sealing structure are that the self-tightening disc-shaped flange sealing structure is suitable for all-metal sealing structures in the range of 20K deep low temperature to room temperature, convenient to install, simple in structure, low in processing difficulty and suitable for larger, causes no extra material to sealing elements, and has the effect of pressure self-tightening.

Description

technical field [0001] The invention relates to a self-tightening dish-shaped flange sealing structure, which is suitable for use in the temperature range from 20K deep low temperature to room temperature. Background technique [0002] Ultra-low temperature fluids such as liquid hydrogen have been widely used in aerospace, new energy and other fields. Because such fluids usually have the characteristics of small thermodynamic critical value, low boiling point, small latent heat of evaporation, strong penetration ability, infiltration ability, flammability and explosion, etc., It is very difficult to seal it. The sealing of liquid hydrogen ultra-low temperature fluid requires that the sealing material has compatibility in liquid hydrogen environment and gas hydrogen environment, and at the same time requires that the material has sufficient toughness and resilience at the temperature of liquid hydrogen, and hydrogen embrittlement cannot occur. [0003] The research on cryoge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L23/032F16L23/20
CPCF16L23/032F16L23/20
Inventor 许光满满郑茂琦邢力超周浩洋张翼张婷石佳王君
Owner BEIJING INST OF ASTRONAUTICAL SYST ENG
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