The Method of Trimming the End Surface of Large Diameter Steel-plastic Composite Water Supply Pipe

Abstract

The method of trimming the end face of the large-diameter steel-plastic composite water supply pipe, the steps of trimming the end face of the large-diameter steel-plastic composite water supply pipe: welding the plastic sealing ring and the cut section of the steel-plastic composite water supply pipe by hot-melt butt welding; unilateral trimming The edge device performs fine trimming of the outer surface; the single-side trimming device performs fine trimming of the inner surface; the double-sided trimming device performs rough trimming of the outer surface and the inner surface at the same time, and does not occupy a special site at the same time, mobile repair steel-plastic composite Pipe edge; improve the pass rate of products, reduce product costs and improve economic benefits. It can be used in water supply and drainage projects.

Description

technical field [0001] The invention relates to the field of large-diameter steel-plastic composite water supply pipe processing equipment, which is mainly used in a device for bilaterally repairing and processing edges after the end face of the steel-plastic composite water supply pipe is sealed. Background technique [0002] After the steel-plastic composite water supply pipe is cut to length, the section of the pipe will expose the steel skeleton layer. In order to ensure that the exposed steel skeleton layer will not be corroded by the conveying medium during the water supply process and ensure the service life of the pipe, the cut section of the pipe must be sealed. Treatment, that is, the plastic sealing ring is welded to the cut section of the pipe by hot-melt butt welding, and the welded plastic sealing ring achieves the purpose of protecting the steel skeleton layer. However, during the sealing process of hot-melt butt welding, excess plastic melt will form on the i...

AI Technical Summary

Problems solved by technology

However, during the sealing process of hot-melt butt welding, excess plastic melt will form on the inner and outer walls of the pipe and adhere to the inner and outer surfaces of the pipe due to external force extrusion, thereby affecting the outer diameter of the pipe and the appearance quality. During the installation process, it is impossible to carry out socket electrofusion welding with electrothermal fusion connection pipe fittings, such as direct, elbow, tee, etc., so the pipe must be repaired after the thermal fusion butt welding sealing treatment to ensure the interface size and Appearance Quality

[0003] The existing device for repairing and processing edges of steel-plastic composite water supply pipes uses a special fixture to fix the steel-plastic composite water supply pipes. The processing tool is fixedly installed on the spindle box of a similar cutting machine tool, and the axial displacement tool is moved through the axial movement of the carriage. Carry out rotary cutting to achieve the purpose of repairing the nozzle, that is, when repairing and processing the edge of the steel-plastic composite water supply pipe, the cutting tool is positioned on the center line of the composite pipe. Since the diameter of the steel-plastic composite water supply pipe varies from 50 mm to 800 mm, The larger the pipe diameter, the greater the non-concentricity, commonly known as the greater the ellipticity, which will cause damage when repairing the edge of the steel-plastic composite water supply pipe, and even require rework and repair; at the same time, the fixed machine tool type steel-plastic composite water supply pipe The device for repairing and processing the edge occupies a fixed space, and the processing efficiency is low

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