Composite connection construction technology for steel reinforced spirally wound polyethylene drainage pipe

Abstract

The invention discloses a hot melting extrusion welding composite heat shrinking sleeve connecting technology. The hot melting extrusion welding composite heat shrinking sleeve connecting technology is adopted and includes the steps that a welding interface is treated, the connecting end of the draining pipe is polished to be flat before welding, and a surface is cleaned; before heat shrinking sleeve connection, the draining pipe and the surface of a heat shrinking sleeve material are cleaned; welding parameters are controlled, during hot melting extrusion welding connection, the walking speed of a weld gun is 3 cm / s and the welding width of a pipe joint is about 4+ / -0.5 mm; and during heat shrinking sleeve connection, the flame walking height is 15+ / -2 cm, the flame walking speed ranges from 10 cm / s to 12.5 cm / s, and the temperature is controlled to ranges from 110 DEG C to 120 DEG C. By means of the hot melting extrusion welding composite heat shrinking sleeve connecting technology, hot melting extrusion welding connection is firstly conducted, and then a heat shrinking belt is adopted for connection; and a polyethylene pipeline connector connected by adopting the technology has high tensile strength which can reach 16.56 MPa, water permeability resistance is good, the water pressure of 0.4 MPa can be borne, acid, alkali and salt corrosion resistance is achieved, the strength is not obviously reduced after 28 d corrosion immersion, and ductility is good during damage.

Description

technical field [0001] The invention belongs to the connection construction technology of municipal drainage pipes, in particular to the composite connection construction technology of plastic-steel winding drainage pipes. Background technique [0002] The polyethylene plastic-steel winding drainage pipe is a high-tech composite pipe product with independent intellectual property rights, world-leading level, green environmental protection, energy saving and consumption reduction. This product is mainly used as a buried drainage pipe. It integrates the rigidity of steel belt and the corrosion resistance of polyethylene, low frictional resistance, light weight, and convenient connection. It has been widely used in municipal engineering, sewage treatment plants and other key projects. middle. [0003] At present, in relevant industry and association standards, such as "polyethylene plastic steel winding drainage pipe" (CJ / T270-2007), "polyethylene plastic steel winding drainag...

AI Technical Summary

Problems solved by technology

However, the process control of the hot melt extrusion welding composite heat shrinkable sleeve technology is not perfect at present, and the research on the process is lacking, so it is impossible to form a joint force of this technology

During the construction process of hot-melt extrusion welding composite heat-shrinkable sleeve technology, there are large differences in the quality of pipe connection due to different construction personnel.

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