Intelligent filling type epoxy coating steel strand and manufacturing method

Abstract

The invention relates to an intelligent filling type epoxy coating steel strand, which comprises a central wire and side wires. A gap between the central wire and each side wire is filled with epoxy resin; epoxy resin is also sprayed on the periphery of each side wire; one of the side wires is taken as an intelligent side wire which comprises a steel wire of an optical fiber and a fiber bragg grating sensor, i.e. a groove is formed in a whole length range of the intelligent side wire, and the optical fiber and fiber bragg grating sensor are implanted in any position in the groove. An optical fiber cable can be drawn from the side face of the filling type epoxy coating steel strand, so that the great change is brought as follows: the optical fiber and fiber bragg grating sensor can be implanted into any position in a length direction of the intelligent filling type epoxy coating steel strand so as to be used for monitoring the stress of the filling type epoxy coating steel strand; the stress of the filling type epoxy coating steel strand can be conveniently monitored on a key section cared by people, the over tensioning of the filling type epoxy coating steel strand is more scientifically guided, and great contribution is made for safety and durability of projects.

Description

Technical field [0001] The invention relates to a steel strand provided with an intelligent fiber grating and anti-corrosion. Background technique [0002] At present, the only mature smart steel strands are smart ordinary steel strands, which are made by embedding and encapsulating fiber grating sensors on the center wire of the formed ordinary steel strands. First of all, it is difficult for this kind of smart steel strand to carve grooves on the center wire, and mass production on the assembly line cannot be realized; second, this kind of smart ordinary steel strand has weak anti-corruption ability and cannot be widely used in actual projects. Anti-corrosion treatment of smart steel strands, such as spraying epoxy resin or applying grease and extruding PE outside, will destroy the optical fiber grating sensor in the smart steel strand, which will cause the smart steel strand to lose its intelligence (monitoring the stress of the steel strand) . [0003] The existing technology...

AI Technical Summary

Problems solved by technology

Since the filled epoxy steel strand is made by pickling, untwisting, spraying epoxy, high-temperature curing, re-twisting, cooling, and coiling on the basis of ordinary steel strands, the patent application number 201710481007.3 has the following Disadvantages: 1) The hollow tubular central wire cannot be realized; 2) Assuming that the hollow tubular central wire is produced, it is impossible to package an optical fiber grating sensor (7153με) that can track the load of the steel strand; 2) The twisted forming of the steel strand requires The temperature is 385°C, and the optical fiber and fiber grating sensor in the grooved central wire can only withstand a temperature of up to 300°C, which is also unrealizable in actual production.

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