Steel strand inhaul cable filled or coated with polyurea protective material and manufacturing method of steel strand inhaul cable

Abstract

The invention relates to a steel strand inhaul cable filled or coated with a polyurea protective material. The steel strand inhaul cable comprises series steel strand inhaul cable bodies including the steel strand inhaul cable body Ia formed in a manner that gaps between n steel strands are filled with the polyurea protective material, the steel strand inhaul cable body Ib formed in a manner that the outer layer of the steel strand inhaul cable body Ia is coated with a polyurea protective coating and the like. A manufacturing method includes the steps that the n steel strands are pretreated, dried and filled with the polyurea protective material, a steel strand combination is molded through coalescence, and the steel strand inhaul cable body Ia filled or coated with the polyurea protective material is formed; and the series steel strand inhaul cable which has multiple protective functions is manufactured by the steel strand inhaul cable body Ia through one or more of the polyurea material coating process I, the wrapping and packaging process, the polyurea material coating process II and III, the extrusion molding process and the like. The method is simple and convenient; the manufactured steel strand inhaul cable is good in tension-resisting strength and flexibility, high in damping and good in ageing resistance, wear resistance and damping performance; the corrosion prevention capacity of the steel strand inhaul cable can be greatly improved, and the service life of the steel strand inhaul cable can be prolonged; and the n is larger than or equal to 1.

Description

technical field [0001] The invention relates to a drag cable and a manufacturing method thereof, in particular to a steel strand drag cable filled or coated with a polyurea protective material 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 directly coat ...

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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