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...

Examples

Embodiment Construction

[0016] Below in conjunction with accompanying drawing, illustrate the concrete content of the present invention in detail:

[0017] like figure 1 The rail transit cable shown is mainly a cable core unit 1 composed of 7 insulated wire cores 13 plus 11 layers of insulating tape, and a filler 12 is densely filled therein. Add an environmentally friendly flame-retardant oxygen barrier tape layer 2 and a thermoplastic oxygen barrier layer 3 outside the cable core unit, add an armor layer 4 outside the oxygen barrier layer, and extrude a sheath 5 outside the armor layer to closely adhere to the armor layer .

[0018] In order to ensure that the power supply or signal is not interrupted immediately after the cable catches fire, a layer of phlogopite mica tape 132 is coated on the conductor as a refractory layer.

[0019] In order to delay the burning speed, the gap in the cable core is densely filled with flame-retardant filling rope 12 to minimize the air area.

[0020] The insul...

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...

Examples

Embodiment Construction

[0016] Below in conjunction with accompanying drawing, illustrate the concrete content of the present invention in detail:

[0017] like figure 1 The rail transit cable shown is mainly a cable core unit 1 composed of 7 insulated wire cores 13 plus 11 layers of insulating tape, and a filler 12 is densely filled therein. Add an environmentally friendly flame-retardant oxygen barrier tape layer 2 and a thermoplastic oxygen barrier layer 3 outside the cable core unit, add an armor layer 4 outside the oxygen barrier layer, and extrude a sheath 5 outside the armor layer to closely adhere to the armor layer .

[0018] In order to ensure that the power supply or signal is not interrupted immediately after the cable catches fire, a layer of phlogopite mica tape 132 is coated on the conductor as a refractory layer.

[0019] In order to delay the burning speed, the gap in the cable core is densely filled with flame-retardant filling rope 12 to minimize the air area.

[0020] The insul...

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