Fabricating method of anticorrosive, blending-proof lead wire free from maintenance

Abstract

The method for making lead wire and connection wire includes following steps: selecting metal connective wire, and wrapping a layer of plastic jacket layer on circumferential of each piece of metal connective wire; using coil winding machine to encircle six pieces of metal connective wire on the plastic jacket layer containing the said metal connective wire; heating the plastic jacket layer to melt external surface of the plastic jacket layer partially; using die or extruder to extrude the melted layer to make the plastic jacket layer and metal connective wires accrete so as to form an integral wire core; then, enwrapping a layer of outer skin protective layer on the said integral wire core. The disclosed lead wire and connection wire can bear shake of train running at high speed. Advantages are: excellent survivability for environmental stress, high and low temperature resistant, waterproof and antirust property, as well as insurability, ageing resistance, and easy of maintenance.

Description

technical field [0001] The invention belongs to a method for manufacturing anti-corrosion, anti-mixing, maintenance-free lead wires for railways. Background technique [0002] Jumper wires and lead wires currently used in railway systems are mainly divided into bare wire type and simple sheathed type. The main disadvantages of the bare wire type and the simple sheathed type are as follows: [0003] (1) Bare wire jumpers and lead wires mostly use ordinary steel strands as the base line without any protection, which is easy to cause short circuit with metal bodies such as boxes and boxes or contact with rails, and is easy to be corroded and bumped to cause rust When the corrosion is serious or the number of broken roots exceeds a certain amount, the impedance of the rail will increase, that is, the loss of traction power will be increased, and the track circuit will be disturbed, causing signal display errors, which will directly affect driving safety and transportation effic...

AI Technical Summary

Problems solved by technology

[0005] (3) Ordinary jumper wires and lead wires are exposed outdoors, and the plug nails or terminals at both ends are protected by heat shrinkable tubes. If the strength is not good, it cannot be well protected against corrosion and rust.

When the connection method of crimping terminals is used, because the hardness of the steel wire is too high and it is not easy to deform during crimping, the terminals will be in poor contact and loose in a long-term vibration environment, resulting in tripping

[0006] (4) When ordinary jumper wires and lead wires are connected to rails by means of cold-extruded plug nails and expansion screws, there are generally phenomena such as poor contact resistance, easy breakage of plug nails, and time-consuming and laborious installation and disassembly of lead wires.

[0007] (5) Since the railway line needs to be regularly tamped with a large machine, when this connection method is used, the lead wire has to be knocked out from the rail (or the cold-extruded plug nail and the expansion screw are removed). The entire thread is taken away to facilitate the operation. The whole work is time-consuming and laborious, and the damage rate of the knocked-out plug is very high. Once the plug is damaged, only a new thread can be replaced.

[0008] Due to the above design defects, it is easy to cause signal equipment failure, which directly affects the safety of railway traffic, train punctuality and transportation efficiency. It is a technical problem and safety hazard that has not been solved for a long time in the use of railway signal equipment

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