Pipeline hot melting wire arrangement method

Abstract

The invention relates to a pipeline hot melting wire arrangement method. The method includes the following steps of embedding metal wires under plastic surface layers in the inner diameter direction or the outer diameter direction of the two ends of a plastic tube and distributing the metal wires in an area to be welded according to the corresponding wire arrangement screw pitch through a wire arrangement knife in the area to be welded of the plastic tube, reserving one section of each end of each metal wire to be exposed out of the corresponding plastic surface layer, and conducting welding after the metal wires are well distributed, and cutting off the sections, exposed out of the plastic surface layers of the plastic tube, of the two ends of each metal wire after the welding is completed. The method is easy and rapid to operate, short in welding time, low in construction cost, level and smooth in appearance after welding and good in welding effect. Even when broken wires exist in the wire arrangement process, the metal wires which have been already embedded can be easily drawn out through the reserved wire heads, the wires can be arranged again, and the difficulty of recovering and separating the metal wires can not occur.

Description

technical field [0001] The invention belongs to the technical field of hot-melt wiring of pipelines, and in particular relates to a method for hot-melt wiring of pipelines. Background technique [0002] Polyethylene plastic gas pipes are closely related to our work and life. It has been nearly 20 years since my country entered the gas market on a large scale, and the annual output has exceeded one million tons. The market size is not small. The connection process of gas pipelines generally includes three process methods: hot-melt butt joint, flange connection, and hot-melt line pipe joint welding. These three methods all need to employ larger cutting, flattening, hot-melt extrusion equipment in operation, have brought very big trouble to connection work. [0003] Among them, the welding of hot-melt pipe joints is more convenient when connecting pipes, but it is quite troublesome to produce such joints. First, the metal wire should be wrapped with a layer of 2mm thick plast...

AI Technical Summary

Problems solved by technology

[0003] Among them, the welding of hot-melt pipe joints is more convenient when connecting pipes, but it is quite troublesome to produce such joints. First, the metal wire should be wrapped with a layer of 2mm thick plastic that is consistent with the material of the gas pipe (similar to ordinary plastic copper wire). , and then use special equipment to wind the wire on the movable insert of the mold, weld the terminals at both ends, put it into the mold and inject the reinforcement layer, once there is a problem in the injection molding process, it is a big problem to recycle and separate the metal wire

Therefore, the price of this kind of hot-melt pipe fittings is very high. In addition, it can only be used in the connection of pipes of the same specification. There are few applications in engineering

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