Bi-direction balance type bellows compensator

Abstract

The invention discloses a bi-direction balance type bellows compensator which comprises a left connection pipe, a ring cover, bellows, a guide pipe, an inner pipe, an outer pipe, a middle connection pipe, padding and a right connection pipe. The left connection pipe and the right connection pipe are thin-wall pipes, and one end of each thin-wall pipe is provided with a flange edge. The ends of the two thin-wall pipes are coaxially arranged in the mode of facing outside. Inner holes of the flange edges are respectively connected with the bellows in a sealing mode. The middle connection pipe in the middle is connected with the other ends of the bellows on the two sides in a sealing mode. The guide pipe and the inner pipe are coaxially arranged in inner cavities of the bellows together in a sleeved mode. The left end of the guide pipe is fixedly connected with the left connection pipe, and the right end of the inner pipe is fixedly connected with the right connection pipe. The outer pipe is a straight pipe covering the bellows in a sleeved mode. The flange edge of the left connection pipe and the flange edge of the right connection pipe are in clearance fit with the inner wall of the outer pipe. The inner wall of the outer pipe in the middle is fixedly connected with the middle connection pipe. The two ends of the outer pipe are respectively and fixedly connected with the ring cover. The padding is filled into the portion between the flange edges of the left connection pipe and the right connection pipe and the ring cover for forming a slide sealing pair. The bi-direction balance type bellows compensator of an integrated structure is small in axial dimension, and the two bellows can achieve the single-direction or bi-direction compensation motion and the balance motion synchronously.

Description

technical field [0001] The invention relates to a pipeline safety device, in particular, the invention relates to a bidirectional balanced bellows compensator for absorbing pipeline axial thrust and compensating axial displacement. Background technique [0002] The temperature and pressure of the built-in medium in the industrial heating network change from time to time, and destructive axial displacement and axial thrust will inevitably occur. In order to ensure the safe operation of the pipeline network, pipeline compensators are usually installed at the relevant nodes of the pipeline network in the project. Bellows compensator is a traditional product, which is widely used in industrial heating network. It uses the flexibility of bellows to absorb axial thrust or compensate pipeline axial displacement. The bellows compensator in the prior art only allows the medium to flow in one direction due to structural limitations, that is to say, the bellows compensator in the prior...

AI Technical Summary

Problems solved by technology

The bellows compensator in the prior art is restricted by the structure, and only allows the medium to flow in one direction. That is to say, the bellows compensator in the prior art can only absorb axial thrust in one direction or compensate axial displacement in one direction.

For some heating networks with built-in media with variable direction flow, two opposite compensators are installed in the node pipes. Although this structure can play a two-way compensation and absorption role, the structure is complicated and the size is large, and the matching bracket The size is also increased accordingly, which results in increased user cost

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