Low-temperature-resistant composite corrugated pipe

Abstract

The invention relates to a low-temperature-resistant composite corrugated pipe which comprises a metal corrugated pipe, joints at the two ends of the corrugated pipe and a net sleeve connected outside the corrugated pipe in a sleeving mode, the joints are spherical joints, the joints and the metal corrugated pipe are connected through connecting pipes, clamping parts are arranged at the ends, close to the metal corrugated pipe, of the connecting pipes, and the net sleeve is fixedly connected with the connecting pipes and the clamping parts through protective sleeves. The two ends of the metal corrugated pipe are pre-pressed and compressed to form corrugated pre-pressing areas, and a non-metal pipe is arranged in an inner cavity of the metal corrugated pipe in a sleeved mode. The net sleeve is covered with a heat preservation layer which is made of polyurethane foam, the outer surface of the heat preservation layer is sleeved with a protection net sleeve, and springs are arranged at the two ends of the protection net sleeve. A non-metal pipe is arranged in an inner cavity of a metal corrugated pipe in a sleeving manner, and the non-metal pipe is attached to the inner wall of the corrugated pipe through glue; the corrugated pre-pressing area, the heat preservation layer, the protection net sleeve, the spring and the sheath are arranged, so that the product has good stretching resistance, low temperature resistance and excessive bending resistance, and good comprehensive performance can still be kept in a low-temperature environment.

Description

technical field [0001] The invention relates to the technical field of bellows, in particular to a low temperature resistant composite bellows. Background technique [0002] Metal corrugated hose is an important connecting component in pipeline engineering. It is generally composed of three parts: the bellows body, the mesh sleeve and the joint. Metal corrugated hose has good flexibility, corrosion resistance, high temperature resistance, low temperature resistance, wear resistance and tensile strength. However, in the actual installation and use process, some existing general-purpose metal hoses have some problems. In complex piping systems, due to the limitation of space, the joints are easy to be excessively bent, and the welded joints are under the action of tensile stress. , The weld seam produced in the installation or use state is easy to be pulled, and the mesh sleeve outside the bellows is also easy to be pulled off. Moreover, in low temperature environments, it i...

AI Technical Summary

Problems solved by technology

However, in the actual installation and use process, some existing general-purpose metal hoses have some problems. In complex piping systems, due to the limitation of space, the joints are easy to be excessively bent, and the welded joints are under the action of tensile stress. , the welding seam produced in the installation or use state is easy to be pulled, and the mesh sleeve outside the bellows is also easy to be pulled off

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