H-shaped metal composite gasket

Abstract

The invention discloses an H-shaped metal composite gasket, which aims to solve the problem that an existing metal spiral wound gasket is prone to being damaged and falling into pieces, and improve the sealing leakage rate. The composite gasket comprises a pressure-bearing ring, wherein an initial pressure inner ring is arranged on the inner side of the pressure-bearing ring, and an initial pressure outer ring at the same height with the initial pressure inner ring is arranged on the outer side of the pressure-bearing ring. The gasket disclosed by the invention has the advantages of reasonable structure, ingenious concept, better anti-torque property, anti-bending property, anti-shearing property and other mechanical properties and strong anti-deformation capability, is less pone to the phenomena of falling into the pieces and crushing, and can meet the requirements of high sealing leakage rate and enable performance indexes to fully exceed the corresponding requirements of the existing standard.

Description

technical field [0001] The invention relates to the field of high-temperature-resistant and high-pressure-resistant wound gaskets, in particular to an H-shaped metal composite gasket. Background technique [0002] Spiral wound gasket is a combined flat gasket formed by alternately winding formed steel strips and non-metallic strips with a certain geometrical section (such as V-shaped or W-shaped). The inner and outer sides of the metal wound gasket are composed of several turns of steel strips. The beginning of the inner steel strip and the end of the outer steel strip are welded to form a whole of the wound gasket. Since the formed steel strips and non-metallic strips are alternately wound in the metal wound gasket, it can only be connected by butt welding. In order to avoid damage caused by improper placement of wound gaskets and excessive compression, it is usually necessary to add a metal inner or outer ring to increase strength and control height. [0003] The metal w...

AI Technical Summary

Problems solved by technology

The main reason is that the metal wound gasket is a composite superimposed structure, and its mechanical properties such as torsion resistance, bending resistance and shear resistance have obvious dissociation, and the difference is large. In the weak direction (such as the thickness direction and the vertical axis ) is easy to damage, especially large diameter (in some cases, the diameter of metal wound gaskets can reach more than 2 to 3 meters) the damage rate of metal wound gaskets is higher; sudden collapse often occurs during the manufacturing process condition; during transportation and installation, if it is subjected to shock or vibration, it may also be damaged and fall apart

The experimental results show that the existing V-shaped or W-shaped metal wound gaskets have poor deformation resistance and are prone to falling apart and crushing.

The existing metal wound gaskets fall apart and are crushed, which not only affects the progress of equipment maintenance, but also may cause catastrophic accidents

Therefore, there is an urgent need for a new type of wound gasket that not only meets the sealing performance requirements, meets the performance index, but also overcomes the fatal shortcomings of the existing metal wound gaskets, which are easy to damage and fall apart.

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