Connecting structure and connecting method of steel wire mesh framework polyethylene composite pipe and application

Abstract

The invention discloses a connecting structure and a connecting method of a steel wire mesh framework polyethylene composite pipe and application. The connecting structure comprises a composite pipe body, and is characterized in that the end part of the composite pipe body is provided with a bell end and a socket end, wherein the bell end is prepared by adopting a steel wire net framework polyethylene composite pipe through a cold press forming method by using a bell forming mould; the socket end is prepared by adopting the steel wire net framework polyethylene composite pipe through a cold pressing forming method by using the bell forming mould, and the socket end is prepared by adopting the steel wire mesh framework polyethylene composite pipe through an injection molding mode by using asocket forming mould. The connecting structure, the connecting method and the application have the beneficial effects that a steel wire mesh framework plastic composite pipe is machined into a tool with the bell end and the socket end with a specific structure, the bell end and the socket end are connected by using hot-melt connection, so that the pressure-bearing strength of the pipe body is extended; and the inner taper angle range of a conical transition surface is 15-25 degrees, the original winding angle of a steel wire layer in the whole external expanding process of a pipe is not damaged due to violent change of the angle, so that the pressure bearing capacity of the conical transition surface in the radial direction is not affected.

Description

technical field [0001] The invention relates to a socket connection scheme and application of plastic pipes, in particular to a socket connection method of steel wire mesh skeleton plastic polyethylene PE and polypropylene PP composite pipe sockets. Background technique [0002] Steel mesh skeleton plastic composite pipe is favored by the pipeline engineering community for its excellent performance. It is known that the Q / 0881DHB008-2018 filing enterprise standard stipulates that the pressure of the pipe can reach the nominal pressure of 7.0Mpa; the existing steel mesh skeleton plastic composite pipe The connection methods of pipes include electrofusion sleeve connection, hot-melt butt welding plus capacitor sleeve connection, electrofusion flange connection, hot-melt socket flange connection, buckle flange connection, and buckle clamp connection. Specially machined connectors. [0003] Mechanical buckle connection and flanging double-seal connection all need to use steel s...

AI Technical Summary

Problems solved by technology

[0009] The second technical problem to be solved is: during the process of expanding the plastic pipe with steel mesh skeleton, the winding angle of the steel wire layer and the distribution gap of the steel wire will change, which will affect the radial pressure bearing capacity of this part; how to form the socket pipe and the socket pipe Reduce the diameter and keep the pressure to ensure the welding strength requirements of the hot-melt connection area. At present, there is no good solution;

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