Manufacturing method of fireproof cable for rail transit

• Main Authors: LIU ZHONGFA, XIAO CHENG, FU XIANG, PENG PENG, LIU ZHONGLING, WANG LIANGLIANG, YU XUEDONG, WANG HONG, LIU HUANHUAN, TIAN DONGSHENG, YE CHENGWEN, YU ZHENGWANG
• Format: Patent
• Language: Chinese; English
• Published: 05.09.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CONDUCTORS; ELECTRICITY; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

The invention discloses a manufacturing method of a fireproof cable for rail transit, and the method specifically comprises the following steps: S1, preparing a rough blank: wrapping the periphery of a copper conductor with a high-temperature-resistant waterproof insulating waterproof sleeve, then wrapping the periphery of the copper conductor with a copper sheath, and filling the space between the copper sheath and the waterproof sleeve with a magnesium hydroxide insulating layer to prepare the rough blank of the fireproof cable; and S2, outer blank cooling: after the copper sheath coats the outer layer of the copper conductor, enabling the fireproof cable rough blank to pass through the through groove of the support plate, pumping liquid water in the water groove by a water pump, and spraying the liquid water to the surface of the copper sheath through a fixed pipe and a plurality of side-by-side spraying pipes. The problems that the outside of a cable is not timely or insufficiently cooled, so that the out