Manufacturing method for five-layer stainless steel-glass fiber reinforced plastic compound heat preservation pipe with pipe joint

Abstract

The invention relates to a manufacturing method for a five-layer stainless steel-glass fiber reinforced plastic compound heat preservation pipe with a pipe joint. The manufacturing method includes the steps that firstly, a stainless steel sheet band with the wall thickness of 0.6-1.0 mm is manufactured into a stainless steel pipe through a full-automatic pipe manufacturing device and welded through an argon welder under protection of injected argon; secondly, the metal pipe obtained in the first step is fixed to rotary shafts of rotary devices, pipe openings in the two ends of the metal pipe are fixed to the rotary shafts of the rotary devices on the two sides respectively when the metal pipe is machined, and the metal pipe can rotate normally by adjusting the rotary shafts; thirdly, alkali-free glass fiber twistless roving is standby on a winding device, the outer wall of the metal pipe to be machined is evenly coated with a layer of unsaturated polyurethane resin, and one end of a piece of alkali-free glass fiber twistless roving is evenly wound around the metal pipe; fourthly, heat preservation foaming is carried out; fifthly, waterproof treatment is carried out. The manufacturing method has the advantages that the process is simple, the service life of the compound pipe is long, internal corrosion prevention and external corrosion prevention are achieved at a time, and the pipe is high in strength and hardness and resistant to abrasion, scaling, high temperature and aging.

Description

technical field [0001] The invention relates to a method for manufacturing a five-layer stainless steel-glass reinforced plastic composite thermal insulation pipe with pipe joints. Background technique [0002] At present, due to the simple manufacturing method of the composite pipes produced by existing manufacturers, such as welded steel pipes with seams, the oxygen supply protection and internal and external protection are not achieved during the welding process, and the joints are often opened and welded, and the pipes are broken, which cannot meet the user's requirements, causing many problems. Big waste and legal disputes. Secondly, there is no insulation layer, which causes temperature loss during the process of conveying the medium, which is not environmentally friendly and energy-saving. Thirdly, domestic ordinary stainless steel sheets are used, which have low strength, low hardness, and are not resistant to tensile force. The pipeline will break and crack during u...

AI Technical Summary

Problems solved by technology

[0002] At present, due to the simple manufacturing method of the composite pipes produced by existing manufacturers, such as welded steel pipes with seams, the oxygen supply protection and internal and external protection are not achieved during the welding process, and the joints are often opened and welded, and the pipes are broken, which cannot meet the user's requirements, resulting in many Big waste and legal disputes. Secondly, there is no insulation layer, which causes temperature loss during the process of conveying the medium, which is not environmentally friendly and energy-saving.

Thirdly, domestic ordinary stainless steel sheets are used, which have low strength, low hardness, and are not resistant to tensile force. The pipeline will break and crack during use, making it impossible to construct and manufacture on-site