A kind of reducing bellows and its forming method

Abstract

A variable-diameter corrugated pipe and a forming method thereof. The variable-diameter corrugated pipe includes a small-diameter straight-side tapered pipe section, a large-diameter straight-side tapered pipe section, and a tapered pipe section between the small-diameter straight-side tapered pipe section and the large-diameter straight-side tapered pipe section. Corrugated section, the peaks and troughs of the tapered corrugated section gradually become larger from the small diameter straight-sided tapered pipe section to the large diameter straight-sided tapered pipe section. The large end of the straight-sided tapered pipe section is connected, the large end of the tapered corrugated section is connected with the small end of the large-diameter straight-sided tapered pipe section at the trough of the end, the small-diameter straight-sided tapered pipe section, and the large-diameter straight-sided tapered pipe section And the tapered corrugated section is made by one-piece molding method, and the double-layer sealing structure is used in the molding method to ensure the success rate and molding quality of the molding. By adopting the invention, not only can reduce the workload of on-site installation of pipe fittings with different diameters, but also help to ensure the safe operation of pipelines.

Description

technical field [0001] The invention relates to the technical field of pipeline compensation, in particular to a variable-diameter bellows and a forming method thereof. Background technique [0002] With the advancement of industrialization and urbanization in my country, large-scale construction of industrial pipelines and domestic heating pipelines is required. Since the transmission medium will cause changes in the temperature of the pipelines, it is necessary to design pipeline compensators to compensate for thermal expansion and contraction of pipelines. Reduce the stress of the pipeline to ensure the safe operation of the pipeline system; in addition, the displacement changes caused by pipeline vibration and foundation settlement also need to be compensated; at the same time, pipes of different sizes need to be connected with different diameter pipe fittings to meet the needs of transportation. Media needs. [0003] Bellows compensators can compensate axial, angular and...

AI Technical Summary

Problems solved by technology

[0004] However, the bellows compensator in the prior art has a single interface size and cannot realize the butt joint between various different-diameter pipes

In order to solve this problem, in the prior art, it is usually solved by adding additional interface components of different-diameter pipes, which causes too many interface components of different-diameter pipes in the pipeline, thereby increasing the procedures such as on-site welding and installation, which is not conducive to reducing project costs

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