Vacuum-resistant polytetrafluoroethylene expansion joint

Abstract

The invention discloses a vacuum-resistant polytetrafluoroethylene expansion joint. An outer reinforcing ring is fixedly welded to the sunken part of the outer wall of a metal bellows, and the outer reinforcing ring is of a double-ring reinforcing structure, and comprises an inner ring and an outer ring; the inner ring and the outer ring are fixedly welded, and an inner reinforcing ring is fixedlywelded to the sunken part of the inner wall of the metal bellows; the inner reinforcing ring is of a double-ring reinforcing structure, and comprises an outer reinforcing ring and an inner reinforcing ring, and the outer reinforcing ring and the inner reinforcing ring are fixedly connected by a plurality of reinforcing rods. The metal bellows is arranged on the main body of the vacuum-resistant polytetrafluoroethylene expansion joint, the outer reinforcing ring is welded to the sunken part of the outer wall of the metal bellows, and the inner reinforcing ring is welded to the sunken part of the inner wall of the metal bellows, accordingly, the strength of the bellows is effectively enhanced without increasing the thickness of a bellows body, and the vacuum resistance of the expansion joint is also improved.

Description

technical field [0001] The invention relates to a vacuum-resistant polytetrafluoroethylene expansion joint. Background technique [0002] The expansion joint is a flexible structure arranged on the container shell or pipeline to compensate for the additional stress caused by temperature difference and mechanical vibration. As an elastic compensating element that can expand freely, it has the advantages of reliable operation, good performance, and compact structure, and has been widely used in chemical industry, metallurgy, nuclear energy and other departments. PTFE expansion joint is a kind of expansion joint. This expansion joint is sometimes used in pipelines with high vacuum. In this way, the external air pressure on the metal bellows is relatively large, which is difficult for ordinary bellows to bear. The wall thickness of the bellows will affect its expansion and contraction performance. Contents of the invention [0003] The invention mainly solves the technical p...

AI Technical Summary

Problems solved by technology

PTFE expansion joint is a kind of expansion joint. This expansion joint is sometimes used in pipelines with high vacuum. In this way, the external air pressure on the metal bellows is relatively large, which is difficult for ordinary bellows to bear. The wall thickness of the bellows will affect its expansion and contraction performance

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