CN202662352U

CN202662352U - Flame-retardant instrument communication cable

Info

Publication number: CN202662352U
Application number: CN 201220223847
Authority: CN
Inventors: 张晓飞; 缪启明; 刘东兵; 缪鹏生
Original assignee: Anhui Lieta Cable Group Co Ltd
Current assignee: Anhui Lieta Cable Group Co Ltd
Priority date: 2012-05-18
Filing date: 2012-05-18
Publication date: 2013-01-09
Anticipated expiration: 2022-05-18

Abstract

The utility model discloses a flame-retardant instrument communication cable. A conductor of the flame-retardant instrument communication cable is twisted by a plurality of silvered soft copper wires, and a polyethylene insulation layer is extruded outside the conductor for constituting an insulation wire core; every two insulation wire cores are twisted to form a pair twist quad, two pair twist quads are twisted to constitute a cable core, the cable core is filled with a tensile rope, and a plastic thin film is adopted outside the cable core for forming a covering layer; and an aluminum belt is adopted outside the covering layer for overlapping and covering a sub-shielding layer, the plurality of silvered soft copper wires are adopted outside the sub-shielding layer for weaving a master shielding layer, and the master shielding layer is extruded with an outer coat layer made of black flame-retardant polyvinyl chloride material. The flame-retardant instrument communication cable disclosed by the utility model has the advantages of good tensile property, good softness and excellent flame retardance.

Description

A kind of fire-retardant instrument communication cable

Technical field

The utility model relates to a kind of fire-retardant instrument communication cable, belongs to technical field of electric wires and cables.

Background technology

In communications industry, can the light general electric wire that is applied to is used for being communicated with various communication apparatus, and this has proposed some special requirements to communication cable, such as tension, glow etc.

The utility model content

The utility model provides the fire-retardant instrument communication cable that a kind of tensile property is good, flexibility is good, fire resistance is superior.

Scheme of the present utility model is as follows: a kind of fire-retardant instrument communication cable, and its conductor extrudes polyethylene layer and consists of insulated wire cores with adopting many silver-plated soft copper skein silks to close outside conductor; Per two thoroughly do away with the edge core is twisted into the pair twist group, and the stranded formation cable core of two pair twist groups adopts the tension rope to fill at the cable core place, adopts the wrapped formation belting layer of plastic film outside cable core; Described belting layer adopts the overlapping wrapped sub-shield of aluminium strip outward, many silver-plated soft copper silk braided overall-shielding layers of the outer employing of described sub-shield, and described total screen is extruded with the outer jacket layer that the black flame-retardant pvc material consists of.

The silver-plated soft copper silk quantity that described conductor adopts 〉=15,10～16 times of twisting pitch.

The monolateral insulation thickness of described insulating barrier is 0.5mm, the thinnest point 〉=0.45mm of insulation.

The monolateral thickness 2.0mm of described external sheath layer, the thinnest point 〉=1.7mm.

The beneficial effects of the utility model:

1, the utility model tensile property is good, flexibility is good, and cable core is filled and adopted the tension rope to fill, and guarantees and improved the tensile property of cable;

2, the polythene material of the utility model insulating material employing, its oxygen index reaches more than 32, therefore its fire resistance is superior; Tensile strength reaches 25～34Mpa; Electrical insulation capability is good, and its disruptive field intensity reaches 40MV/m, and percentage elongation reaches 600%;

3, the utility model sheath material adopts the flame-proof polyvinyl chloride material, and its fire resistance is superior, and oxygen index reaches more than 35, its long-range circumstances working temperature reaches-15～70 ℃, has guaranteed simultaneously the flexibility of cable, its hot strength 〉=25Mpa, elongation at break 〉=350%, tearing strength 〉=65KN/m.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.

A kind of fire-retardant instrument communication cable, its conductor 1 usefulness adopt many silver-plated soft copper skein silks to close, and extrude polyethylene layer 2 and consist of insulated wire cores outside conductor 1; Per two thoroughly do away with the edge core is twisted into pair twist group 3, two pair twist groups 3 stranded formation cable cores 4, and 4 adopt the tension rope to fill at the cable core place, at the wrapped formation belting layer 5 of cable core 4 outer employing plastic films; 6 layers of the overlapping wrapped separated-shieldings of described belting layer 5 outer employing aluminium strips, many silver-plated soft copper silk braided overall-shielding layers 7 of described sub-shield 6 outer employings, described total screen are extruded with the outer jacket layer 8 that the black flame-retardant pvc material consists of.

In the implementation, the silver-plated soft copper silk quantity that conductor 1 adopts 〉=15,10～16 times of twisting pitch; Insulating barrier 2 monolateral insulation thicknesses are 0.5mm, the thinnest point 〉=0.45mm of insulation; 8 layers of monolateral thickness 2.0mm of oversheath, the thinnest point 〉=1.7mm.

The utility model structural design is compact, scientific and reasonable, and conductor and shielding are closed for many silver-plated soft copper skein silks, can effectively prevent copper conductor to the aging catalytic action of insulating barrier, to guarantee the useful life of insulating barrier.Simultaneously, also can effectively prevent the oxidation of soft copper monofilament conductor and shielding itself at the electroplate of soft copper monofilament, increase the safety and reliability in the use procedure; Cable core is filled and is adopted the tension rope to fill, and guarantees and improved the tensile property of cable; The twisted wire pitch of pair twist group is controlled at lay≤40mm scope, it is that the wrapped shielding of aluminium strip adds compound total shielding construction form that screen adopts separated-shielding, particularly total screen adopts braiding to add wrapped shielding construction, Effective Raise the antijamming capability of cable, guarantee line capacitance less than 500PF/100m, be applicable to signal transmission and control circuit in instrument, instrument and other electric equipment.

Cable insulation adopts fire-retardant polyethylene material to extrude moulding, Effective Raise the serviceability of product.The conductor maximum operating temperature reaches 80 ℃, and the overload temperature reaches 160 ℃ during short circuit, and simultaneously electric property and mechanical performance are good, particularly have can use continuously at low temperatures with temperature environment jumpy in the stable outstanding advantages that waits of retention still;

Cable jacket adopts the extrusion modling of flame-proof polyvinyl chloride material, has guaranteed the accordance of cable overall dimension, has guaranteed simultaneously the rounding of cable profile.

Although above embodiment of the present utility model has been given to describe in detail and explanation; but what should indicate is; we can carry out various equivalences to above-mentioned execution mode according to conception of the present utility model and change and modification; when its function that produces does not exceed spiritual that specification and accompanying drawing contain yet, all should be within protection range of the present utility model.

Claims

1. a fire-retardant instrument communication cable is characterized in that conductor with adopting many silver-plated soft copper skein silks to close, extrudes polyethylene layer and consists of insulated wire cores outside conductor; Per two thoroughly do away with the edge core is twisted into the pair twist group, and the stranded formation cable core of two pair twist groups adopts the tension rope to fill at the cable core place, adopts the wrapped formation belting layer of plastic film outside cable core; Described belting layer adopts the overlapping wrapped sub-shield of aluminium strip outward, many silver-plated soft copper silk braided overall-shielding layers of the outer employing of described sub-shield, and described total screen is extruded with the outer jacket layer that the black flame-retardant pvc material consists of.

2. a kind of fire-retardant instrument communication cable according to claim 1 is characterized in that the silver-plated soft copper silk quantity that described conductor adopts 〉=15,10～16 times of twisting pitch.

3. a kind of fire-retardant instrument communication cable according to claim 1 is characterized in that the monolateral insulation thickness of described insulating barrier is 0.5mm, the thinnest point 〉=0.45mm of insulation.

4. a kind of fire-retardant instrument communication cable according to claim 1, the monolateral thickness 2.0mm of the described external sheath layer of its feature, the thinnest point 〉=1.7mm.