Plain end screw pipe and processing method thereof

Abstract

The inventive spiral pipeline consists of a spiral pipeline body and a connecting member fixed at one end or two ends of the spiral pipeline body for connecting the end ports. One end of the screw end port connecting member is a screw end port and the other end is a flat port. The inventive manufacture method includes the following steps of heating melting the screw end ports of the connecting member and the spiral pipeline body and welding two screw end ports together under a certain pressure to be a integral one, at last changing the screw end port of the spiral pipeline body into the flat port to realize the flat port connection between the pipelines.

Description

technical field [0001] The invention relates to a flat spiral pipe and a processing method thereof, belonging to the technical field of plastic pipes and their connection processing. Background technique [0002] Existing spiral pipes such as steel belt reinforced spiral corrugated pipes and hollow wall spiral pipes generally adopt a one-time continuous forming process of spiral winding. Due to the manufacturing process, the pipe ports are helical surfaces. Due to the special shape of the port and the complex structure and composition of the pipe wall, the connection between the pipes is difficult, which seriously affects the further popularization and application of the spiral pipe. The current connection methods mainly include extrusion welding, electric fusion belt welding and mechanical connection. The overall strength and stiffness of the extrusion welding connection interface is low, and because the wall of the plastic drainage pipe is very thin,...

AI Technical Summary

Problems solved by technology

The overall strength and stiffness of the extrusion welding connection interface is low, and because the wall of the plastic drainage pipe is very thin, the connection area is small, so the misalignment of the port will seriously affect the welding quality, and when the misalignment is large, it will also cause failure to weld

The welding surface of electric fusion belt welding is narrow, and the requirements for roundness and dimensional tolerance at the ports of the two pipes are relatively high, and the requirements for surface flatness at the troughs of the ports are also high. The outer surface is uneven, therefore, it often causes the interface to leak or break

The mechanical connection is to use the Huff clamp to cover the corrugations of several pitches at the ends of the two pipes. The troughs are filled with rubber plugs to achieve connection and sealing. The connection strength and rigidity are good, but due to the sleeve covering and The rubber filling area is relatively large, and the connection wastes materials. At the same time, the cost of sleeve and bolt anti-corrosion treatment increases, and the connection cost is high and the efficiency is low.

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