A low-smoke, halogen-free, flame-retardant, high-voltage flexible cable for smart energy EMUs and its production process

Abstract

The invention discloses a low-smoke zero-halogen flame-retardant high-voltage flexible cable for a smart energy motor train unit and a production process. The cable sequentially comprises a conductor, a semi-conductive nylon tape, a semi-conductive inner shielding layer, an ethylene propylene rubber layer, a peelable semi-conductive outer shielding layer, a high-fire resistant semi-conductive tape, a copper wire shielding layer, a first high-fire resistant glass tape, a second high-fire resistant glass tape, an inner jacket and an outer jacket, wherein the inner jacket is high-fire resistant rubber with oxygen index more than 50%. In the cable, the inner jacket adopts the high-fire resistant rubber with the oxygen index more than 50%, and thus, the time of flame entering an inner layer of the cable can be effectively prolonged; the first high-fire resistant glass tape and the second high-fire resistant glass tape have excellent fire-resistant abilities, a large amount of flame can be suppressed, and the flame-retardant capability and the light transmission rate of the cable are improved; the high-fire resistant semi-conductive tape is compatible with fire-retardant and semi-conductive functions; and therefore, the flame-retardant capability and the light transmission rate of the cable are effectively enhanced.

Description

technical field [0001] The invention relates to the field of locomotive cables, in particular to a low-smoke, halogen-free, flame-retardant, high-voltage flexible cable for smart energy EMUs and a production process. Background technique [0002] In recent years, EMU technology has developed rapidly, and at the same time, the performance requirements for supporting cables are very high. EMUs require cables to have the characteristics of high flame retardancy, low smoke, halogen-free and environmental protection. High-voltage flexible cables for EMUs are used to connect external high-voltage electrical appliances of high-speed railways and traction transformers, and are very close to passengers. Therefore, the cables are required to be highly flame-retardant and have a small amount of smoke released during combustion. In the event of a fire, they can continue to supply power for a short period of time, which is beneficial to passengers. escape. Therefore, it is necessary to...

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Problems solved by technology

In addition, because the cable is a rubber sheath, it needs to be processed in a continuous vulcanization steam pipeline. The length of the vulcanization pipeline exceeds 100m, so it must be longer than 100m during the trial production of the sheath. There is a lot of waste, so it is necessary to develop a new process to produce a short section of sheath for testing the flame retardancy and light transmittance of the cable, which can effectively reduce waste

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