Variable-diameter corrugated pipe and shaping method for same

Abstract

The invention provides a variable-diameter corrugated pipe and a shaping method for the same. The variable-diameter corrugated pipe comprises a small-diameter straight edge conical pipe section, a large-diameter straight edge conical pipe section and a conical corrugated section disposed between the small-diameter straight edge conical pipe section and the large-diameter straight edge conical pipe section, wherein wave crests and wave troughs of the conical corrugated section gradually increase from the small-diameter straight edge conical pipe section to the large-diameter straight edge conical pipe section, and the whole conical corrugated section is conical; a small end of the conical corrugated section located at the corresponding wave trough is connected to a large end of the small-diameter straight edge conical pipe section; a large end of the conical corrugated section located at the corresponding wave trough is connected to a small end of the large-diameter straight edge conical pipe section; and the small-diameter straight edge conical pipe section, the large-diameter straight edge conical pipe section and the conical corrugated section are fabricated through integral shaping, wherein a dual-layer sealing structure is adopted in the shaping method to ensure a success rate of the shaping and shaping quality. According to the invention, workloads required for onsite installation of variable-diameter pipe fittings can be reduced, and safe pipeline running can be ensured.

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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