An industrial heat-resistant and fire-resistant instrument cable and its preparation process

Abstract

The invention discloses an industrial heat-resisting fireproofing instrument cable which is characterized in that a conductor is formed by a plurality of tinned copper wires in a twisting mode, a fireproofing layer wraps the conductor in a pressing mode, an insulating layer wraps the fireproofing layer in a pressing mode to form an insulating wire core, a pair twisting set is formed by two insulating wire cores, a polyester belt wraps the outer surface of the pair twisting set in a lapping mode, and a shielding layer knitted by tinned copper wires is arranged on the outer surface of the polyester belt to form a pair twisting unit. A cable core is formed by the multiple pair twisting units in a twisting mode. A polyester belt lapping wrapping layer, a longitudinal drainage wire, a tinned copper wire knitting total shielding layer, a copper foil lapping wrapping layer and an outer jacket layer formed in a pressing wrapping mode are sequentially arranged on the outer surface of the cable core from inside to outside, and the insulating layer and the outer jacket layer are made of fluororesin. The industrial heat-resisting fireproofing instrument cable has excellent fireproof performance and high-temperature-resisting performance, has excellent electrical performance and bending performance, is light and handy in cable structure, and meets the requirement for serving as an electric instrument connecting wire under the harsh high temperature environment.

Description

technical field [0001] The invention relates to an electrical equipment instrument cable and a preparation process thereof, in particular to an industrial heat-resistant and fireproof instrument cable and a preparation process thereof, belonging to the technical field of electric wires and cables. Background technique [0002] Instrument cables for electrical equipment are mainly used for connection lines between instruments, electrical appliances and related automation control devices in industrial power distribution networks. They can transmit control signals, information transmission, and can also be used to transmit electric energy. In some occasions, this type of cable also needs to have the performance requirements of flame retardancy and fire resistance. Since the transmission frequency of this type of cable is between 1MHz and 100MHz, if the traditional fire-resistant structure is used, the excessive thickness of the insulating layer and the large dielectric constant...

AI Technical Summary

Problems solved by technology

However, the use of mineral insulation or mica tape as the refractory layer has affected the electrical performance indicators of this type of cable due to the large size of the structure, and the design requirements cannot be met; The rubber becomes powdery during the burning process, which loses its insulation performance and makes the fire resistance of the cable unstable

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