huanzhong explain the knowledge of bellows compensator.
Expansion joints are also customarily called compensators. It consists of bellows and end pipes, brackets, flanges, conduits and other accessories that constitute its working body. Expansion joint is a flexible structure set on the vessel shell or pipe in order to compensate for the additional stress caused by temperature difference and mechanical vibration.
The compensator uses the effective expansion and contraction deformation of its working body bellows to absorb the dimensional changes of pipelines, conduits, vessels, etc. caused by thermal expansion and contraction, or to compensate for the axial, lateral and angular displacements of pipelines, conduits, vessels, etc. It can also be used for noise and vibration reduction and heating. In order to prevent pipeline deformation or damage caused by thermal elongation or temperature stress when the heating pipeline heats up, it is necessary to set up compensators on the pipeline to compensate for the thermal elongation of the pipeline, so as to reduce the stress on the pipe wall and the force acting on the valve or support structure.
As an elastic compensation element that can expand and contract freely, the expansion joint has the advantages of reliable work, good performance and compact structure, and has been widely used in the chemical industry, metallurgy, nuclear energy and other sectors. In terms of the shape of the corrugation, U-shaped expansion joints are widely used, followed by Ω-shaped and C-shaped expansion joints. The expansion joints used in pipelines are divided into pressure balance type, hinge type and universal joint type in terms of structural compensation.
