CN210896658U - High-frequency and low-loss shielding type six-class environment-friendly digital communication cable - Google Patents

Abstract

The utility model discloses a high-frequency and low-loss shielding type six-class environment-friendly digital communication cable in the communication cable field, which comprises a plurality of wire cores, the wire core is internally provided with wires which are twisted in pairs, the wires are internally provided with conductors, the periphery of the conductor is provided with an insulating layer, the high-density polyethylene inner insulating sleeve of the insulating layer is arranged on the periphery of the conductor, the periphery of the high-density polyethylene inner insulating sleeve is provided with a foamed polyethylene middle insulating sleeve, the periphery of the foamed polyethylene middle insulating sleeve is provided with a high-density polyethylene outer insulating sleeve, the sinle silk sets up in the stranding layer, the periphery on stranding layer is provided with total shielding layer, total shielding layer's periphery is provided with the sheath, and structure, line pair electric capacity, crosstalk are unstable, and mechanical properties is good, can satisfy high frequency, low-loss transmission requirement well, the utility model discloses can be used to the communication transmission.

Description

High-frequency and low-loss shielding type six-class environment-friendly digital communication cable

Technical Field

The utility model relates to a communication cable.

Background

The prior art discloses the announcement number as: CN 202720961U, bulletin date 2013.02.06, discloses a bending-resistant high-frequency communication cable, which comprises 8 conductor single wires, wherein the 8 conductor single wires are twisted two by two to form four twisted wire pairs; the conductor single wire is formed by twisting 7 strands of conducting wire wires, and each conducting wire consists of a steel wire positioned in the center and a copper layer positioned on the outer surface of the steel wire; the outer surfaces of the twisted wire pairs are coated with insulating layers, an outer sheath layer is coated on the outer sides of the four groups of twisted wire pairs, the diameter of each wire is 0.16-0.2 mm, and the outer sheath layer is a polyethylene or polyvinyl chloride layer. The utility model discloses high frequency digital cable forms and has the new conductor structure that is equal to pure copper conductor transmission characteristic, is applied to the digital cable and conducts the signal of telecommunication, and the product satisfies digital cable's transmission performance, and has good bending resistance ability, and product cost greatly reduced has considerable economic benefits and social. The cable structure, line pair capacitance, crosstalk are unstable, mechanical performance is poor, and transmission requirements of high frequency and low loss cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high frequency and six types of environmental protection digital communication cables of low-loss shielding type, structure, line pair electric capacity, crosstalk are unstable, and mechanical properties is good, can satisfy high frequency, low-loss transmission requirement well.

In order to realize the above object, the utility model provides a six types of environmental protection digital communication cables of high frequency and low-loss shielding type, including a plurality of sinle silks, be provided with the wire in the sinle silks, the pair twist setting between the wire, be provided with the conductor in the wire, the periphery of conductor is provided with the insulating layer, the high density polyethylene internal insulation cover of insulating layer sets up the periphery at the conductor, the periphery of high density polyethylene internal insulation cover is provided with insulating cover in the foamed polyethylene, insulating cover's periphery is provided with high density polyethylene external insulation cover in the foamed polyethylene, the sinle silks set up in the stranding in situ, the periphery on stranding layer is provided with total shielding layer, total shielding layer's periphery is provided with the sheath.

Compared with the prior art, the beneficial effects of the utility model reside in that, adopt the three-layer to crowd foamed polyethylene altogether insulating, the concentricity reaches more than 95%, guarantees that the attenuation ratio solid insulation's of cable attenuation diminishes, and light in weight, total shield layer can ensure that outside electromagnetic interference can not influence the signal transmission of cable, and structure, line pair electric capacity, crosstalk are unstable, and mechanical properties is good, can satisfy high frequency, low-loss transmission requirement well, the utility model discloses can be used to communication transmission.

As the utility model discloses a further improvement, the cabling layer is heat melt type self-adhesion polyester area, can make the cable have higher mechanical strength like this, and good insulating properties can be high temperature resistant and low temperature, guarantees the stable in structure of cable.

As the utility model discloses a further improvement, total shield layer includes aluminium foil layer and tinned copper wire weaving layer, the aluminium foil layer sets up the periphery on the stranding layer, the tinned copper wire weaving layer sets up the periphery on the aluminium foil layer, adopts the double shielding effect that line pair aluminium foil + tinned copper wire woven like this, weaves density and reaches more than 85%, further ensures that outside electromagnetic interference does not influence the signal transmission of cable.

As the utility model discloses a further improvement, the cabling in situ is filled there is the fin cross, it has four line chambeies to hold the layer to cut apart through the fin cross, the sinle silk sets up respectively in four line intracavity, can guarantee the structural stability of cable, and the stability to electric capacity makes the transmission frequency of cable improve to the line.

As a further improvement, the sheath is made of low-smoke halogen-free flame-retardant polyolefin, so that the cable has better fireproof performance, low pollution and more environmental protection.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The cable comprises a sheath 1, a main shielding layer 2, a tail wing cross 3, a cabling layer 4, an insulating layer 5 and a conductor 6.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1, the high-frequency and low-loss shielding type six-category environment-friendly digital communication cable comprises a plurality of wire cores, wherein wires are arranged in the wire cores, the wires are twisted in pairs, conductors 6 are arranged in the wires, an insulating layer 5 is arranged on the periphery of the conductors 6, a high-density polyethylene inner insulating sleeve of the insulating layer 5 is arranged on the periphery of the conductors 6, a foamed polyethylene middle insulating sleeve is arranged on the periphery of the high-density polyethylene inner insulating sleeve, a high-density polyethylene outer insulating sleeve is arranged on the periphery of the foamed polyethylene middle insulating sleeve, the wire cores are arranged in a cabling layer 4, a main shielding layer 2 is arranged on the periphery of the cabling layer 4, and a sheath 1 is arranged on the periphery of the main shielding layer 2; the cabling layer 4 is a hot melt type self-adhesive polyester tape; the main shielding layer 2 comprises an aluminum foil layer and a tinned copper wire braided layer, the aluminum foil layer is arranged on the periphery of the cabling layer 4, and the tinned copper wire braided layer is arranged on the periphery of the aluminum foil layer; the cable-forming layer 4 is internally filled with an empennage cross 3, the cable-bearing layer is divided into four wire cavities by the empennage cross 3, and the wire cores are respectively arranged in the four wire cavities; the sheath 1 is made of low-smoke halogen-free flame-retardant polyolefin.

In the utility model, three-layer co-extrusion foaming polyethylene insulation is adopted, the concentricity reaches more than 95 percent, and the cable is ensured to have smaller attenuation than that of solid insulation and light weight; the pre-twisting technology and the back-twisting technology in a certain proportion are adopted to eliminate the influence of the eccentricity of the insulated single line on the characteristic impedance; the cable is wrapped and fixed by a hot-melt self-adhesive polyester tape, so that the stable structure of the cable is ensured; the empennage cross 3 is adopted for filling, so that the structural stability of the cable and the stability of line pair capacitors are ensured, and the transmission frequency of the cable is improved; the double shielding effect of weaving the aluminum foil and the tinned copper wire is adopted, the weaving density reaches more than 85%, and the signal transmission of the cable is not influenced by external electromagnetic interference.

The present invention is not limited to the above embodiments, and based on the technical solutions of the present disclosure, those skilled in the art can make some substitutions and transformations to some technical features without creative labor according to the disclosed technical contents, and these substitutions and transformations are all within the protection scope of the present invention.

Claims (5)

1. The utility model provides a high frequency and six types of environmental protection digital communication cables of low-loss shielding type, includes a plurality of sinle silks, be provided with the wire in the sinle silks, the pair twist setting between the wire, be provided with the conductor in the wire, the periphery of conductor is provided with insulating layer, its characterized in that: the high density polyethylene internal insulation cover of insulating layer sets up the periphery at the conductor, the periphery of high density polyethylene internal insulation cover is provided with insulating cover in the foaming polyethylene, insulating cover's periphery is provided with the high density polyethylene external insulation cover in the foaming polyethylene, the sinle silk sets up in the cabling layer, the periphery on cabling layer is provided with total shielding layer, the periphery on total shielding layer is provided with the sheath.

2. The high frequency and low loss shielded class six environmental protection digital communication cable of claim 1, wherein: the cabling layer is a hot-melt self-adhesive polyester tape.

3. A high frequency and low loss shielded class six environmental protection digital communication cable according to claim 2 wherein: the total shielding layer comprises an aluminum foil layer and a tinned copper wire woven layer, the aluminum foil layer is arranged on the periphery of the cabling layer, and the tinned copper wire woven layer is arranged on the periphery of the aluminum foil layer.

4. A high frequency and low loss shielded class six environmental protection digital communication cable according to claim 3 wherein: the cable forming layer is filled with an empennage cross, the cable bearing layer is divided into four wire cavities by the empennage cross, and the wire cores are respectively arranged in the four wire cavities.

5. The high frequency and low loss shielded class six environmental protection digital communication cable according to any one of claims 1 to 4, wherein: the sheath is low smoke zero halogen flame retardant polyolefin material.

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