Steel strand cable with polyurea protective material on outer layer and manufacturing method thereof

Abstract

A steel strand cable with a polyurea protective material on the outer layer, comprising a steel strand assembly composed of n steel strands, and a polyurea protective coating I is coated on the outer layer of the n steel strand assembly A steel strand cable Ia with a polyurea protective material on the outer layer is formed, and a steel strand cable Ia0b composed of a polyurea protective coating II is coated on the outer layer of the wrapping tape of the steel strand cable Ia. The production method is to pass the steel strand assembly after pretreatment, drying, and forming steps through polyurea material coating process I, wrapping process, polyurea material coating process II, extrusion molding, and polyurea material coating process. One or more steps in the coating process III and other processes to make a series of steel strand cables with multiple protections. The production method of the invention is simple; the produced steel strand cable has good tensile strength, flexibility, high damping, aging resistance, wear resistance, and good vibration damping performance; it can greatly improve the anticorrosion ability of the steel strand cable and extend the The service life of twisted cable, 1≤n≤1000.

Description

technical field [0001] The invention relates to a drag cable and a manufacturing method thereof, in particular to a steel strand drag cable 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 directly coa...

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 anticorrosion 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; therefore, prestressed steel strands Anti-corrosion is a major issue related to the quality and life of bridge engineering. Feasible anti-corrosion measures must be strengthened for prestressed steel strands to reduce the huge losses caused by early failure of prestressed steel strands due to corrosion.

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