Preparation method of a wear-resistant and corrosion-resistant composite pipeline with high bonding strength

Abstract

The invention discloses a preparation method for a wear-resistant corrosion-resistant composite conveying pipeline with high bonding strength. The preparation method comprises the following steps: preparation of a glass fiber reinforced plastic pipe body; and centrifugal shaping of a polyurethane elastomer wearing layer. The preparation method is reasonably designed, has strong operationality and high production efficiency and can save a great amount of manpower and material resources; in particular, demolding cloth is wound on a die before winding of the glass fiber reinforced plastic pipe body, which enables a uniform rough surface to be formed on the inner surface of the glass fiber reinforced plastic pipe body, so a plurality of disadvantages that the inner wall of a glass fiber reinforced plastic pipeline needs polishing and the like in the prior art are overcome; the glass fiber reinforced plastic pipe body is assembled on a lathe for casting of polyurethane prepolymer, the polyurethane prepolymer uniformly coats and is cured on the inner wall of the glass fiber reinforced plastic pipe body under the action of high-speed rotating centrifugal force, so no special die is needed and manufacturing cost is low. The composite conveying pipeline prepared in the invention has excellent wear resistance and corrosion resistance; the bonding strength of the glass fiber reinforced plastic pipe body and the polyurethane elastomer wearing layer is high; and the service life of the composite conveying pipeline is long.

Description

Technical field [0001] The invention relates to a pipeline, in particular to a preparation method of a wear-resistant and corrosion-resistant composite transportation pipeline with high bonding strength. Background technique [0002] In the transportation industry, pipelines are often under the interaction of chemical corrosive media and particle wear and other complex environmental media. Because pipes often only have a single performance of wear resistance or corrosion resistance, pipes are used in working conditions where corrosion and wear coexist. The service life is extremely limited, the pipelines are often corroded or worn out prematurely, and the amount of maintenance and secondary costs during use are very large. Although FRP pipes have good corrosion resistance, they have poor wear resistance. Polyurethane elastomer materials have excellent wear resistance. The polyurethane elastomer materials with excellent wear resistance are tightly bonded to FRP with excellent corr...

AI Technical Summary

Problems solved by technology

[0002] In the transportation industry, pipelines are often under the interaction of complex environmental media such as chemical corrosion media and particle wear. Since pipes often only have a single performance of wear resistance or corrosion resistance, in the working conditions accompanied by corrosion and wear, pipes are used The service life is extremely limited, the pipeline is often corroded or worn out prematurely, and the amount of maintenance and secondary costs incurred during use are large

Although the FRP pipe has good corrosion resistance, its wear resistance is poor, and the polyurethane elastomer material has excellent wear resistance. The polyurethane elastomer material with excellent wear resistance is tightly bonded to the FRP with excellent corrosion resistance. The inner wall of the pipeline can effectively solve the above problems

[0003] After the FRP pipe is wound and solidified, the inner surface is often smooth and attached with a release agent. If the polyurethane elastomer wear-resistant layer is directly adhered to the inner wall of the FRP pipe, the adhesion is very poor. The treatment of the inner wall of the pipe is not only complicated in operation, but also requires high equipment and is difficult. It is difficult to ensure that the inner wall of the FRP pipe is uniformly rough. It is urgent to find a simple and stable process that can form uniform roughness on the inner wall of the FRP pipe. surface method to improve the bonding strength between the inner wall of the FRP pipe and the polyurethane elastomer wear-resistant layer

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