Rail transit cable with oxygen isolating layer and manufacturing method thereof

Abstract

The invention discloses a rail transit cable with an oxygen isolating layer. The cable comprises a cable core unit. The cable core unit is filled by a filler. A thermoplastic low-smoke halogen-free flame-retardant outer sheath layer is coated outside the cable core unit. An environment-friendly flame-retardant oxygen-isolating belting layer, a thermoplastic oxygen isolating layer and an armor layer are coated in sequence from inside to outside between the cable core unit and the thermoplastic low-smoke halogen-free flame-retardant outer sheath layer. The method for manufacturing the rail transit cable includes: wrapping a conductor used for transmitting electric energy with a phlogopite tape, then performing extruded insulation; using a flame-retardant filling rope or tape to fill in gaps in the cable core unit; and extruding a thermoplastic low-smoke halogen-free flame-retardant polyolefin material on the cable core. The rail transit cable has the advantages that the flame-retardant grade of the cable is effectively improved, and environment-friendly performance and safety performance of the cable are greatly improved.

Description

technical field [0001] The invention relates to a cable, in particular to a cable for rail transit. The invention also relates to a method of manufacturing said cable. Background technique [0002] With the rapid development of urban rail transit construction, the necessary cable materials for line construction: power cables, communication cables, signal cables and various control cables are intensively used in various track lines. Once these cables are put into use, In the long-term electrified state, the temperature on the conductor will be very high, and the long-term high temperature state will cause the insulation layer on the conductor to age quickly. Since the original cable is made of non-flame-retardant or low-level flame-retardant material structure, once the cable insulation is aged, short-circuit combustion failure will occur after laying and use, releasing smoke and toxic gases, which may cause power supply or signal interruption, and seriously Then cause pers...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of urban rail transit construction, the necessary cable materials for line construction: power cables, communication cables, signal cables and various control cables are intensively used in various track lines. Once these cables are put into use, In the long-term energized state, the temperature on the conductor will be very high, and the long-term high temperature state will cause the insulation layer on the conductor to age quickly

Since the original cable is made of non-flame-retardant or low-level flame-retardant material structure, once the cable insulation is aged, short-circuit combustion failure will occur after laying and use, releasing smoke and toxic gases, which may cause power supply or signal interruption, and seriously It will cause personal and property safety accidents, and the hazards are especially serious in large and medium-sized cities where the crowd is relatively concentrated.

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