Anti-static flame-retardant steel skeleton fiber reinforced resin pipe and preparation technology thereof

Abstract

The invention belongs to the technical field of mine conveying pipe bodies, and discloses an anti-static flame-retardant steel skeleton fiber reinforced resin pipe and a preparation technology of the anti-static flame-retardant steel skeleton fiber reinforced resin pipe. The anti-static flame-retardant steel skeleton fiber reinforced resin pipe is technically characterized in that the anti-static flame-retardant steel skeleton fiber reinforced resin pipe comprises a pipe body which comprises a seepage-proof flame-retardant conductive inner lining layer and a pressure-bearing flame-retardant conductive structural layer from inside to outside, wherein the seepage-proof flame-retardant conductive inner lining layer comprises glass fiber solidified on an inner base body, and the pressure-bearing flame-retardant conductive structural layer comprises an outer base body which is synchronously provided with a zinc-coated steel wire and glass fiber direct roving in a winding mode, wherein epoxy resin is coated on the outer surface of the zinc-coated steel wire. According to the anti-static flame-retardant steel skeleton fiber reinforced resin pipe, matching among all layers of fiber is reasonable, mechanical property is strengthened, meanwhile, weight of the tube body is lightened, multi-wall carbon nanotubes and nanometer aluminium hydroxide are filled, fine structures of all layers are changed, meanwhile, bending resistant strength and shock resistance capability are enhanced, wear-resisting property and conductivity are largely improved, service life is prolonged, and cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of conveying pipes, and in particular relates to an antistatic and flame-resistant steel skeleton fiber-reinforced resin pipe and a preparation process thereof. Background technique [0002] Similar types of steel skeleton fiber reinforced resin pipes, high strength resin steel mesh composite pipes and antistatic flame retardant fiber reinforced resin composite pipes used in coal mine conveying pipes are usually composed of surface conductive layer, middle strength layer, inner Lining wear-resistant layer composition. [0003] 1. The surface conductive layer is usually formed by curing fibers, resins, curing agents and accelerators, adding flame retardants, antistatic agents, and conductive carbon black. Since the surface resistance value of the pipe body used in the mine environment is generally required to be within 10 4 —10 8 Ω, and must comply with the relevant requirements of the AQ1071-2009 pipe bod...

AI Technical Summary

Problems solved by technology

This results in a decline in the mechanical properties of the pipe body, a 20%-30% reduction in elongation of the pipe body, and a 15%-40% reduction in flexural performance, resulting in a significant reduction in the pressure bearing capacity of the pipe body and the safety factor of the long-term use of the pipe body.

Furthermore, due to the special environment of the coal mine underground, small cracks or cracks will appear on the inner and outer surfaces of the steel-frame fiber-reinforced resin pipe after one or two years of use, which greatly reduces the service life of the steel-frame fiber-reinforced resin pipe. The scope of use of this pipe body is also greatly limited;

[0004] 2. The middle strength layer is usually wound on the basis of the inner lining layer with reinforced fibers and fabrics and a cross mesh steel wire skeleton with a helical structure. The problem is that the winding angle of the fibers and steel wires is generally between 50°-80° , this range is too wide and the number of steel wires in the section of the pipe body is not fixed, resulting in confusion in the production and processing of this type of pipe body, which brings hidden dangers to the safe production of coal mines

In addition, the adhesion between the steel wire and the resin often results in delamination due to improper selection of fillers. For example, the commonly used nano-calcium carbonate is generally unmodified, and it does not have adhesion itself, but only reduces The cost of the manufacturer, but exacerbated the generation of stratification;

[0005] 3. The inner lining layer is usually formed by curing fibers and resins added with flame retardants, antistatic agents, nano-calcium carbonate and conductive carbon black. Most of the bearing media of the skeleton fiber reinforced resin pipe body are water and air. The requirements for the inner lining layer are the functions of anti-corrosion, leakage, conductivity and flame resistance, and there is no requirement for wear resistance, so this is invisible. The production cost of the pipe body

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