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Dual-sealing flange

A double sealing and flange technology, applied in the direction of flange connection, pipe/pipe joint/pipe fitting, passing element, etc., can solve the problem of small stress concentration factor, etc., achieve good use conditions, increase service life, and facilitate disassembly and assembly. Effect

Inactive Publication Date: 2013-05-01
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned problems in the prior art, the present invention aims to provide a double-sealed flange to overcome the shortcoming that ordinary flanges cannot be used in high-temperature and strong-corrosion environments for a long time. It can run stably for a long time, and has good structural integrity, and has a small stress concentration factor under high temperature conditions

Method used

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Embodiment Construction

[0024] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0025] see Figure 1 to Figure 6 , the present invention, that is, a double sealing flange, which includes a female flange 1, a male flange 2, a graphite wound gasket 3 and a metal C-shaped sealing ring 4, wherein:

[0026] The center of one end face of the female flange 1 is provided with a groove 11, and a groove 12 is provided around the groove 11 on the end face, and an air intake passage is symmetrically provided between the groove 11 and the groove 12 on the end face. A hole 13 and an air outlet through hole 14, the air inlet through hole 13 and the air outlet through hole 14 communicate with the groove 11 through a protective gas channel 15 respectively;

[0027] The center of one end surface of the male flange 2 is provided with a boss 21 matching the groove 11;

[0028] The graphite wound gasket 3 is arranged in the groove 11, and the gr...

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Abstract

The invention relates to a dual-sealing flange, which comprises a night-side flange and a sunny-side flange. A groove is formed in the center of one end face of the night-side flange. A lug boss matched with the groove is formed in the center of one end face of the sunny-side flange. The flange also comprises a graphite spiral wound gasket arranged in the groove and a C-shaped metal sealing ring. A trough for accommodating the C-shaped metal sealing ring is reserved around the groove in the end face of the night-side flange. An air inlet through hole and an air outlet through hole are also symmetrically reserved between the groove and the trough in the end face of the night-side flange, and are communicated with the groove through a protective air channel respectively. The dual-sealing flange can run stably and safely in an ultrahigh-temperature highly-corrosive environment, has a good sealing effect, and has the advantage of convenience for assembly and disassembly, a good using condition is created for a sealing part, and the service life of the sealing part is prolonged.

Description

technical field [0001] The invention relates to a flange structure, in particular to a double sealing flange. Background technique [0002] As a detachable connection, flanges are widely used in many fields such as machinery, petrochemical and nuclear industries. Ordinary single sealing flanges are usually used in pairs, and adopt the structure of the male and female surfaces. The graphite gasket or metal sealing ring is usually used for single-layer sealing between the female flange and the male flange, and finally through bolts or clamps. The hoop provides preload. However, there are defects in the application of this ordinary single-sealed pipeline connection flange in the environment of high temperature and strong corrosion (such as hydrofluoric acid) exceeding 400 ° C, because: there is a gap between the two flanges after the fit and seal, Therefore, it is easy to expose the part of the sealing element to the air and be oxidized; specifically, the graphite in the grap...

Claims

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Application Information

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IPC IPC(8): F16L23/032F16L23/18F16L23/20
Inventor 傅远张钦华黎忠谢雷东唐忠锋杨新梅孔祥波朱海华
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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