Preparation method for carbon fibre composite dragline

Abstract

The invention relates to a preparation method for a carbon fibre composite dragline. The method comprises the following steps: closely arraying carbon fibre composite ribs with a determined quantity in a regular hexagon to form a carbon fibre bundle; performing left-handed slight twisting on the carbon fibre bundle by 1-3 degrees, then lapping a high-strength polyester fibre band for shaping a line body; performing high density polyethylene hot extrusion on the shaped line body twice to form a high density polyethylene sheath; installing anchorage devices at the both ends of the carbon fibre bundle, designing the form of the anchorage devices according to a structure of combining a conical barrel shape with a straight barrel type to form an anchoring conical section and an anchoring straight barrel section; dispersing the carbon fibre composite ribs at the anchoring conical section, and locating the carbon fibre composite ribs by a front division plate and a rear division plate; and pouring epoxy resin mortar in gaps between conical cavities of the anchorage devices and the carbon fibre composite ribs, and curing at a normal temperature. According to the method disclosed by the invention, an extrusion friction force between the anchoring resin mortar and the ribs can be increased, an anchoring length can be reduced, and the close combination degree between the polyethylene sheath and the carbon fibre composite line body can be increased, and coiled transport for the lines can be facilitated.

Description

technical field [0001] The invention relates to a method for making a carbon fiber composite cable. It is mainly used to make carbon fiber composite cable-stayed cables for cable-stayed bridges. Background technique [0002] Carbon fiber composite materials have excellent properties such as light weight, high strength, no rust, corrosion resistance, fatigue resistance, low thermal expansion coefficient, and good shock absorption performance. Using carbon fiber composite material tendons for cable components in long-span cable bridges can be obtained from Fundamentally solve the problem of poor fatigue resistance and corrosion resistance of steel cables. At present, the cable-making process of carbon fiber cables is relatively simple. The carbon fiber composite reinforcements are arranged in parallel, and there is a certain distance between the carbon fiber composite reinforcements. The disadvantages of this process technology are: [0003] One: Due to the certain distance...

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Problems solved by technology

[0003] One: The diameter of the cable body is too large due to the certain distance between the carbon fiber composite reinforcements of the cable body, which is not conducive to the coiling and transportation of the finished cable

[0004] Second: due to the parallel arrangement of carbon fiber composite reinforcements at the anchorage part of the cables, the extrusion friction between the anchoring resin mortar and the reinforcements is not enough, resulting in too long anchorage length, which is not conducive to the increase of the tonnage of the anchor tube

[0005] Third: It is very difficult to put a polyethylene sheath on the outer surface of the long cable, and it may cause a gap between the polyethylene sheath and the carbon fiber cable body, which is not conducive to the stability of the cable. If the outer surface of the cable body is directly thermally extruded Ethylene, the resulting high temperature will cause the strength of the carbon fiber composite material to decrease

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