Steel strand with polyurea protection material on outer layer and manufacturing method of steel strand

Abstract

The invention discloses a steel strand with a polyurea protection material on the outer layer. A steel strand body with the polyurea protection material on the outer layer is formed in the manner that a polyurea protection coating I made of the polyurea material is arranged on the periphery of the whole steel strand, or the gap formed through twisting of a center wire and side wires is filled with the polyurea material, and a steel strand body with the polyurea protection material on the outer layer is formed in the manner that the polyurea protection coating I made of the polyurea material is arranged on the periphery of the whole steel strand. A manufacturing method of the steel strand comprises the steps that in steel wire preprocessing, surface processing and priming are carried out, the preprocessed center wire and the preprocessed side wires are twisted to form the steel strand, one or more of the polyurea material coating procedure I, the twining and wrapping procedure, the polyurea material coating procedure II, the polyurea material coating procedure III, the extrusion molding procedure and other procedures are carried out, and the series steel strand with multiple protection is manufactured. The manufacturing method is easy and convenient to conduct. The manufactured steel strand is high in tensile strength, good in flexibility, high in damping, resistant to ageing and abrasion, and good in vibration damping performance; and the anti-corrosion capability of the steel strand can be greatly improved, and the service life of the steel strand is prolonged.

Description

technical field [0001] The invention relates to an anti-corrosion steel strand and a manufacturing method thereof, in particular to a steel strand with a polyurea protective material on the outer layer and a manufacturing method thereof. Background technique [0002] Cables are the core components of cable-supported bridges and buildings. The design life of bridges and buildings as basic engineering is 70 years or even more than 100 years, while the service life of current steel strand cables is only 20 to 30 years. Cable-supported bridges and buildings need to change cables many times during use, and the cost of changing cables is high and affects the use. Therefore, the steel strand, which is the unit component of the steel strand cable, needs a new structural form to ensure its high durability. [0003] The steel strand is usually twisted by the center wire and the side wire. At present, there are generally two types of anti-corrosion steel strands. The first is to direc...

AI Technical Summary

Problems solved by technology

[0005] 1. The coating is easy to crack and fall off, and it is also easy to produce pinholes, so the steel strand is easily corroded, which affects the service life of the steel strand;

[0006] 2. Since the coating of the overall coated steel strand is thermosetting epoxy resin, the coated steel strand has high rigidity and poor bendability, and the epoxy resin will have aging phenomenon after long-term application, and its wear resistance is poor.

[0007] In addition, galvanized, galvanized aluminum and other steel strands adopt the anti-corrosion method of sacrificial medium, which is not easily affected by local defects such as pinholes, but its coating is easy to wear and tear, so its service life is generally not particularly long

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