Flame retardant and antistatic steel mesh skeleton polyethylene composite pipe for mining and manufacturing method thereof

Abstract

The invention relates to a flame retardant and antistatic steel mesh skeleton polyethylene composite pipe for mining and a manufacturing method thereof. The method is characterized in that the polyethylene composite pipe is obtained by the manufacturing processes of subjecting dedicated composite modified polyethylene plastics to flame retarding and antistatic treatment in two steps, compositing the treated plastics with a high-strength steel mesh skeleton and a hot melt adhesive bond for several times, and heating and vacuuming the composite for several times. At least two layers of high-strength steel wires are wound to be reticulate in an oblique crossing manner, arranged between the outer wall of the inner layer and the inner wall of the outer layer as a skeleton, and tightly combined with the pipe body of the inner and outer layers into an integral whole by means of a hot melt adhesive, thus forming a composite pipe for underground coal mines, which is flame-retardant and antistatic and has relatively high mechanical strength and pressure resistance, long service life and other excellent properties. As the pipes are connected through welding by electric melting pipe fittings, the flame retardant and antistatic steel mesh skeleton polyethylene composite pipe for mining has high overall properties and convenience in laying, is applicable to the coal mine industry with strict property requirements in all aspects, and is also applicable to water supply and drainage, fire protection and gas delivery in the municipality and construction.

Description

Technical field [0001] The invention relates to a polyethylene composite pipe, in particular to a mine flame-retardant antistatic steel wire mesh skeleton polyethylene composite pipe and a preparation method thereof. Background technique [0002] All kinds of pipes are inevitably used in underground water supply, drainage, positive pressure ventilation, negative pressure ventilation, spraying, gas drainage, and protection of power cables and optical fiber communication signal cables. Due to the harsh working environment in the mine, the requirements for the pipes used are much higher than in ordinary occasions. For example, there is flammable and explosive gas in the mine. When it reaches a certain concentration, even a little bit such as the spark caused by the discharge of static electricity may ignite it, or even a gas explosion may cause tragedy, which will hinder the pipes. Combustion performance and antistatic performance have higher requirements. [0003] Under normal circ...

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of "delamination" at the junction of composite pipes, insufficient axial tensile resistance and poor weldability, and provides a flame-retardant, antistatic, corrosion-resistant, high-pressure resistant, high-rigidity performance, axial tensile resistance Mine-used flame-retardant and antistatic steel wire mesh skeleton polyethylene composite pipe with high performance and good welding performance and preparation method thereof

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