Large-caliber steel-plastic composite water supply pipe end face trimming method

Abstract

The invention relates to a large-caliber steel-plastic composite water supply pipe end face trimming method. The large-caliber steel-plastic composite water supply pipe end face trimming steps include: welding a plastic sealing ring and a steel-plastic composite water supply pipe cutting section by means of hot melting butt welding; conducting outer surface fine trimming by a single side trimming device; performing inner surface fine trimming by the single side trimming device; and conducting rough trimming on the inner surface and outer surface simultaneously by a double side trimming device. Also, the edge of the steel-plastic composite pipe can be trimmed movably without occupying special field. The qualified rate of the product is improved, the product cost is reduced, and the economic benefits are improved. The method can be applied in water supply and drainage engineering.

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 ...

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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