Dual-ring sealing washer and its mfg. method

Abstract

The present invention relates to a double-ring gasket seal. It includes the following several portions: outside metal tube, inside metal tube, flexible seal filling material, limited middle ring, limited outer ring, limited inner ring and cladding layers respectively covering upper and lower surfaces of inside and outside metal tubes. The outside metal tube is fastened between the limited outer ring and limited middle ring, the inside metal tube is fastened between the limited middle ring and limited inner ring, on the limited middle ring at least a through hole passed through upper and lower surfaces of limited middle ring is cut. Its manufacture method includes the following steps: (1), filling the flexible seal filling material into metal tube interior; (2), bending and making the metal tube into the form of ring; (3), butt-welding two ends of metal tube; (4), making the inside metal tube and outside metal tube be respectively and concentrically fastened between the limited inner ring and limited middle ring and between the limited middle ring and limited outer ring; and (5), respectively covering upper and lower surfaces of inside and outside metal tubes with cladding layers.

Description

technical field [0001] The invention relates to a sealing gasket and a manufacturing method thereof, in particular to a double-ring sealing gasket and a manufacturing method thereof. Background technique [0002] In the prior art, the sealing gaskets are mostly made of flexible materials, such as asbestos, rubber, etc., due to the poor ability of such materials to bear stress, after a period of use, due to the pressure and ambient temperature, the sealing gaskets It is easy to age or relax, and the sealing performance becomes poor or even loses the sealing performance. At the same time, it is easy to bend and deform during installation, which affects the sealing effect. There are also sealing gaskets made of metal materials. Because the metal tube is hollow, the pressure resistance and compression rebound performance are limited, and the scope of application is narrow. On this basis, an improved metal sealing gasket is used. On the hollow metal tu...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the sealing gaskets are mostly made of flexible materials, such as asbestos, rubber, etc., due to the poor ability of such materials to bear stress, after a period of use, due to the pressure and ambient temperature, the sealing gaskets It is easy to age or relax, and the sealing performance becomes poor or even loses the sealing performance. At the same time, it is easy to bend and deform during installation, which affects the sealing effect

There are also sealing gaskets made of metal materials. Because the metal tube is hollow, the pressure resistance and compression rebound performance are limited, and the scope of application is narrow. On this basis, an improved metal sealing gasket is used. On the hollow metal tube There is an opening, although it plays the role of self-tightening seal, it is prone to bursting and being blocked by the medium when used, and the ideal sealing effect cannot be achieved.

In the occasion where the performance of the sealing gasket is high, it is difficult to monitor the leakage of the sealing gasket and cause losses, and even accidents in severe cases

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