Production process of special highly-flame-retardant wire harness for rail transit

Abstract

The invention relates to a production process of a special highly-flame-retardant wire harness for rail transit. Each cable in a wire harness is coated with a heat conduction ice wire layer, in orderto improve the heat conduction and heat dissipation capabilities of the wire harness. Through the arrangement of a coiled cooling belt and a net-shaped cable sheath, inner-outer double-layer heat conduction and heat dissipation effects can be achieved, the wire harness can be rapidly cooled, the temperature near the wire harness can be lower than the temperature of an electrical system of the whole rail transit, the situation in which a cable can be easily ignited due to excessive temperature is avoided, and the safety is improved. The coiled cooling belt located on the outer side after beingturned over can achieve a heat insulation effect and avoid the influence on normal use of the wire harness due to the too high or too low external environment temperature. Because of the use of a dual-state heat conductor in the coiled cooling belt, heat conduction and heat dissipation effects can be achieved, and the effects of reminding a worker of leakage of the dual-state heat conductor and guiding the worker to a leakage point can be achieved to a certain extent.

Description

technical field [0001] The invention relates to a wire harness production process, in particular to a special wire harness production process with high flame retardancy for rail transit. Background technique [0002] With the rapid growth of my country's high-speed rail operating mileage, the variability of the natural environment experienced is increasing, and higher requirements are constantly being put forward for the safety of the car body and the comfort in the car. The stability and anti-seismic performance requirements of components are getting higher and higher. [0003] Existing rail transit vehicles mainly include different series of vehicles such as EMUs, urban rail vehicles, railway passenger cars, and light rail vehicles. There are certain differences in electrical systems and structures. The configuration from the structure to the electrical system has certain commonalities, but there are also certain differences. Taking the 8-carriage high-speed rail or bullet...

AI Technical Summary

Problems solved by technology

Therefore, the electrical settings of each car will be different. The electrical design of various models is usually carried out separately for each model. Therefore, there are also large differences in the design and production of electrical harnesses. There are electrical harness wiring designs and The construction standards are not uniform, and the construction quality is unstable. Moreover, if the design of the electrical wiring harness and the supporting manufacturing method are carried out separately for different structures of the car body, it will be time-consuming and labor-intensive, affecting the progress of R&D and production, and cannot form an effective R&D inheritance.

[0004] The entire power and electrical system of rail transit is very complex, requiring various large-scale operating machinery and high power support, resulting in very high heat generated by the entire rail transit, and in actual use, the cables of rail transit are combined together , to form a cable, but because the cable will generate heat when it is used, when it exists in the form of a wire bundle, the multi-strand cables are combined together, and the heat generated is difficult to dissipate in time, resulting in the multiplication of heat generated. The temperature will also be very high, which will have a great impact on the performance and service life of the cable itself. At the same time, the heat will accumulate to a certain extent, which may cause the cable to catch fire, posing a great safety hazard.

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