High-temperature flange sealing structure comprising flexible graphite metal omega-shaped tooth composite gasket

Abstract

The invention relates to the field of a pipeline flange sealing structure, in particular to a high-temperature flange sealing structure comprising a flexible graphite metal omega-shaped tooth composite gasket. The high-temperature flange sealing structure is characterized by comprising an upper flange, a lower flange and the flexible graphite metal omega-shaped tooth composite gasket. The upper surface and the lower surface of a metal frame of the flexible graphite metal omega-shaped tooth composite gasket are provided with annular boss in multiple circles respectively, the annular bosses are provided with omega-shaped sections and arranged at equal distance, the planar parts of the upper and lower surfaces of the flexible graphite metal omega-shaped tooth composite gasket are provided with flexible graphite layers, annular grooves matched with the annular bosses are arranged on the contact surfaces of the upper flange, the lower flange and the flexible graphite metal omega-shaped tooth composite gasket and provided with rectangular sections, the annular bosses are inserted into the annular grooves correspondingly and are in interference fit with the same. The high-temperature flange sealing structure can be applied to high-temperature and -pressure working conditions, excellent tightness can be kept for a long time, and leak of the flanges can be effectively prevented.

Description

technical field [0001] The invention relates to the field of sealing structures of pipe flanges, in particular to a high-temperature flange sealing structure containing flexible graphite metal Ω-shaped tooth composite pads. Background technique [0002] Since the beginning of the 21st century, the contradictions between economic development and energy supply and environmental protection have become increasingly prominent, and countries all over the world have taken "safety, efficiency, environmental protection, and economy" as the theme of industrial development. This trend is mainly reflected in the safe operation of high-temperature equipment and the tightness of connection systems in the petrochemical industry. Flange connection is widely used in the connection of pressure pipes and pressure vessels in the petrochemical industry due to its easy disassembly and assembly. When under high temperature and high pressure conditions for a long time, the flange connection is pro...

AI Technical Summary

Problems solved by technology

When under high temperature and high pressure conditions for a long time, the flange connection is prone to leakage and failure

Commonly used raised face flanges have a convex platform on the end face of the flange. Under working conditions, a bending moment will be generated on the flange, the gasket will be unevenly stressed, the flange will deflect, and leakage will easily occur.

In addition, under high temperature and high pressure operating conditions, the flange end faces, gaskets and bolts will all be subject to great stress, resulting in the creep of the materials of the various components in the flange connection, resulting in relaxation of the flange connection system of the pipeline, and eventually resulting in leakage failure

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