Fire-proof-data-bus preparation technology and cable

Abstract

The invention discloses a fire-proof-data-bus preparation technology and a cable. In the fire-proof-data-bus preparation technology, tinned copper conductors are stranded through a wire-and-cable stranding machine or a bunching machine, skin-foam-skin low-medium-loss polyethylene insulation is extruded through a cable extruding machine outside the conductors, and is subjected to irradiation crosslinking through an electron accelcrator to serve as insulation layers, low-medium-loss polyethylene is extruded through cable equipment, and is subjected to irradiation crosslinking through the electron accelcrator to serve as insulation wire cores and filling cores, the insulation wire cores are wrapped with calcined mica tapes, and the insulation wire cores wrapped with the calcined mica tapes and the filling cores are stranded together through a cable former; the calcined mica tapes and a combined shielding layer are arranged on outer layers of insulation layers wrapped with the calcined mica tapes and the filling cores, the combined shielding layer is formed by longitudinally wrapping aluminum foils and is formed by weaving tinned copper wires through a weaving machine, and a drain wireis arranged between two layers of shields; a low-smoke-zero-halogen cross-linked polyolefin material is extruded outside the shields and is irradiated through the electron accelcrator to serve as a protection layer. The cable has the fire-proof capacity of the flame-retardant and the fire-proof cable, and when the cable is directly and continuously burned through flames, a short circuit or an open circuit does not occur.

Description

technical field [0001] The invention relates to a preparation process of a fire-resistant data bus and a cable. The product is suitable for occasions requiring high fire-proof conditions such as rail transit. Background technique [0002] In the past five years, as a representative of "Made in China", China's rail transit equipment has continuously made breakthroughs in the international market, completing the transition from parts export to complete vehicle export, from low-end products to high-end products, and from underdeveloped markets to developed markets. change. Rail transit vehicles made in China have become a shining "China business card". The rapid development of my country's rail transit is inseparable from the improvement of my country's technology, especially the improvement of independent research and development capabilities. At the same time, it also puts forward higher requirements for data bus cables for rail transit vehicles, and puts forward fire-resist...

AI Technical Summary

Problems solved by technology

At the same time, the conventional fire-resistant cable with mica tape still releases toxic gas when burning, and special requirements are put forward for low-smoke, halogen-free and non-toxic products.

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