CN202632822U - Low-smoke halogen-free flame-retardant A type stainless steel armored cable - Google Patents

Abstract

The utility model discloses a low-smoke halogen-free flame-retardant A type stainless steel armored cable. The cable comprises a cable core and a protective layer, wherein a non-woven cloth wrapping tape is wrapped outside the cable core; a scraping adhesive tape cushion layer is wrapped outside the wrapping tape; embossed stainless steel is arranged outside the cushion layer, and is longitudinally covered and wrapped on the cushion layer by welding; a flame-retardant inner protective layer is wrapped outside embossed stainless steel by extruding, and a cross-linked flame-retardant polyolefin outer protective layer is wrapped outside the inner protective layer by extruding; the cable core is formed by intertwining insulating shielded wire cores, and inorganic fiber fillers are arranged in gaps of the cable core; and each insulating shielded wire core is formed by arranging a conductor shielding layer outside a conductor, wrapping a cross-linked polyethylene insulating layer outside the conductor shielding layer by extruding, arranging an aluminum-plastic composite tape insulating shielding layer outside the insulating layer and wrapping a copper strip outside the insulating shielding layer, and color stripes are arranged on the copper strip. The low-smoke halogen-free flame-retardant A type stainless steel armored cable has high flame retardation, meets A type flame retardation requirements, and has excellent mechanical shock resistance.

Description

Low Smoke Halogen Free Flame Retardant Class A Stainless Steel Armored Cable

technical field

The utility model discloses a cable structure, in particular to a low-smoke, halogen-free, flame-retardant Class A stainless steel armored cable, which belongs to the technical field of cable manufacturing.

Background technique

Traditional steel tape armored cables and aluminum-sheathed corrugated armored cables can ensure the rodent-proof, bending, moisture-proof, anti-corrosion and mechanical shock resistance of communication cables, but they cannot meet the high-safety occasions of 35kV and below in the subway power supply system High-level (Class A) flame retardant requirements. In addition, the sheath of traditional armored cables either has high mechanical strength and poor flame retardancy; play.

Utility model content

    The technical problem to be solved by the utility model is to provide a low-smoke, halogen-free flame-retardant Class A stainless steel armored cable. The product has good flame-retardant performance, meets the requirements of Class-A flame-retardant, and has excellent mechanical shock resistance.

In order to solve the above technical problems, the utility model low-smoke, halogen-free, flame-retardant Class A stainless steel armored cable includes a cable core and a sheath, the cable core is wrapped with a non-woven tape, and the tape is wrapped with a scraping tape with a buffer layer. , the buffer layer is provided with corrugated stainless steel, the corrugated stainless steel is welded and wrapped on the buffer layer, the corrugated stainless steel is extruded with a flame-retardant inner sheath, and the inner sheath is extruded with a cross-linked flame-retardant polyolefin material Sheath; the cable core is twisted by insulating and shielding wire cores, and the gap between the cable cores is provided with inorganic fiber filler; the insulating and shielding wire core is provided with a conductor shielding layer outside the conductor, and the conductor shielding layer is extruded and wrapped with cross-linked polyethylene The insulating layer is formed by wrapping the aluminum-plastic composite tape on the outside of the insulating layer, and the insulation shielding layer is wrapped on the outside of the copper tape, and the copper tape is provided with color bars.

The utility model has the following beneficial effects: first, the buffer tape is used for wrapping, so as to ensure that the cable core is not damaged when the aluminum sheath is welded and crimped. Second, the sheath consists of two layers, the inner sheath and the outer sheath. The inner sheath has good flame retardant performance, and the outer sheath has strong mechanical properties. The sheath has both flame retardant and mechanical properties, which solves the traditional cable outer sheath. The technical problem that the mechanical strength and flame retardant properties of the sheath are not compatible. Third, stainless steel is used for armoring, which has good corrosion resistance, moisture resistance, and rodent and ant resistance.

Description of drawings

Fig. 1 is a structural schematic diagram of a low-smoke, halogen-free, flame-retardant Class A stainless steel armored cable of the present invention;

In the figure: 1 conductor, 2 conductor shielding layer, 3 insulating layer, 4 insulating shielding layer, 5 color strip, 6 copper tape, 7 filler, 8 wrapping tape, 9 buffer layer, 10 corrugated stainless steel, 11 flame retardant inner sheath layer, 12 outer sheaths.

Detailed ways

Conductor 1, conductor 1 is extruded with conductor shielding layer 2, conductor shielding layer 2 is extruded with XLPE insulation layer 3, insulation layer 3 is extruded with aluminum-plastic compound tape insulation shielding layer 4 , the insulating shielding layer 4 is wrapped with a copper tape 6 to form an insulating shielding core. Color bars 5 are provided on the copper strip 6 of the insulated shielding wire core.

Twisting the insulated and shielded wire cores into a cable, the gaps between the cable cores are provided with inorganic fiber fillers 7 to ensure the roundness of the cable core. The cable core is wrapped with non-woven fabric wrapping tape 8, and the wrapping tape is wrapped with scraping rubber cloth with a buffer layer 9, and the buffer layer 9 is provided with corrugated stainless steel 10, and the corrugated stainless steel 10 is longitudinally wrapped and welded on the buffer layer 9, rolled Patterned stainless steel 10 is extruded with a flame-retardant inner sheath 11, and the inner sheath is extruded with a cross-linked flame-retardant polyolefin material outer sheath 12 to form a low-smoke, halogen-free, flame-retardant Class A stainless steel armored cable. The oxygen index OI of the inner sheath is set above 40, and the tensile strength is 9-10MPa. The oxygen index OI of the outer sheath is set above 30, and the tensile strength is 12-15 MPa.

The utility model has the following beneficial effects: first, the buffer tape is used for wrapping, so as to ensure that the cable core is not damaged when the aluminum sheath is welded and crimped. Second, the sheath includes two layers, the inner sheath and the outer sheath. The inner sheath has good flame retardancy, the outer sheath has strong mechanical properties, and the sheath has both flame retardant and mechanical properties. Third, stainless steel is used for armoring, which has good corrosion resistance, moisture resistance, and rodent and ant resistance.

Claims (1)

1. A low-smoke, halogen-free, flame-retardant Class A stainless steel armored cable, including a cable core and a sheath, characterized in that the cable core is wrapped with a non-woven tape, and the tape is wrapped with a scraping tape with a buffer layer. There is corrugated stainless steel on the outside of the buffer layer, and the corrugated stainless steel is welded and wrapped on the buffer layer. The corrugated stainless steel is extruded with a flame-retardant inner sheath, and the inner sheath is extruded with a cross-linked flame-retardant polyolefin material outer sheath. layer; the cable core is twisted by insulating and shielding wire cores, and the gap between the cable cores is provided with inorganic fiber filler; the insulating and shielding wire core is provided with a conductor shielding layer outside the conductor, and the conductor shielding layer is extruded and wrapped with cross-linked polyethylene insulation The insulating layer is wrapped with an aluminum-plastic composite tape and an insulating shielding layer, and the insulating shielding layer is wrapped with a copper tape, and the copper tape is provided with a color strip.

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