Sawtooth bellow expansion joint

Abstract

The invention discloses a sawtooth bellow expansion joint which is composed of flanges, a bellow and connecting pipes together. The flanges are located at the upper end and the lower end, and the flanges placed flat are coaxially connected with the bellow through the vertical connecting pipes in a sealing mode. Tooth-shaped waves of the bellow are in a sawtooth shape, and every two tooth-shaped waves are connected in circular arc transition. When the sawtooth bellow expansion joint of the structure operates, the tooth-shaped waves of the bellow are provided with no medium residue, and the bottoms of tooth-shaped wave grooves are always kept clean, so that no obstacle exists when the bellow elastically deforms, and flexible compensation action is ensured. Most importantly, no medium residue exists at the bottoms of the tooth-shaped grooves of the bellow, so that corrosion and damaging are avoided, the service life of the expansion joint is greatly prolonged, and using cost of a user is greatly reduced.

Description

technical field [0001] The invention relates to a pipeline safety device, in particular, the invention relates to an expansion joint, especially an expansion joint used for supporting vertical pipelines. Background technique [0002] The industrial pipe network usually determines the direction according to the process flow and the location of the equipment. The criss-cross pipe network will cause corresponding thermal expansion and contraction deformation due to the temperature and pressure changes of the built-in medium during operation. The main manifestations of pipe deformation are axial force and displacement. . In order to eliminate the destructiveness of axial force and displacement to the pipe network to the greatest extent in the project, necessary expansion joints are arranged on some nodes of the pipe network. An expansion joint is a general purpose pipeline safety device that relies on the elasticity of the bellows to absorb or compensate for pipeline deformatio...

AI Technical Summary

Problems solved by technology

If there is corrosive medium residue at the bottom of the corrugated pipe groove, the bottom of the wave groove will inevitably cause corrosive damage

For example, the flue gas pipeline in the carbon black manufacturing industry is a vertical pipeline, which must be equipped with expansion joints. During the flue gas exhaust process, a part of the carbon black particles will settle to the bottom of the corrugated pipe, and the long-term accumulated carbon black particles will increase. The bellows bear load and reduce the compensation flexibility. The biggest problem is that the carbon black particles are corrosive to the bellows. Corrosion for a period of time will inevitably lead to penetrating damage to the bellows.

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