CN201681662U - Digital communication cable for multiple outsides - Google Patents

Abstract

The utility model relates to a digital communication cable for multiple outsides, comprising a cable core and a protective sleeve; the cable core is divided into a central layer and a twisted outer layer, the central layer is composed of a central line set arranged at the center and a PVC protective layer at the periphery of the central line set, the twisted outer layer is composed of a plurality of polyester belt lapping line set units and a plurality of common line set units which are arranged with the polyester belt lapping line set units at interval, and the polyester belt lapping line set units and the common line set units are arranged at the periphery of the PVC protective layer of the central layer in a twisting way. In the utility model, by arranging the polyester belt lapping line set units and the common line set units at interval, the problems of cross talk and electromagnetic interference are effectively solved, and the cable is better adaptive to the outdoor complex environment.

Description

A large logarithm outdoor digital communication cable

technical field

The utility model relates to a large logarithm outdoor digital communication cable.

Background technique

With the rise of broadband communication access network construction, digital communication cables are widely used as the ideal transmission medium for the last 100m of the information highway. In order to adapt to the development of high-bit-rate digital access telecommunication networks and the need for digital communication cables to extend from indoor to outdoor, the demand for 25-pair digital communication cables, up to 100 pairs, and 150-pair digital communication cables has increased rapidly in recent years.

However, the existing various types of digital communication cables still have major deficiencies in electromagnetic interference, crosstalk, etc., especially not applicable to the requirements of outdoor environments. This application is based on the above-mentioned background.

Utility model content

The purpose of the utility model is to provide a communication cable suitable for outdoor use that can effectively prevent electromagnetic interference and crosstalk in order to overcome the deficiencies of the prior art.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a large logarithm digital communication cable for outdoor use, which includes a cable core formed by an even number of insulated single wires, and a sheath covering the cable core , each of the insulated single wires is composed of a copper wire and an insulating sheath covering the outer circumference of the copper wire, each two of the insulated single wires are twisted into a line group, and the cable core is divided into a central layer and a stranded outer layer. layer, the central layer is composed of a center line group located in the center and a PVC sheath covering the periphery of the center line group, and the stranded outer layer is composed of a plurality of polyester tapes wrapped around the wire group unit and with It is composed of a plurality of common wire unit units which are wrapped with polyester tape at intervals, and said polyester tape wrapped wire unit and common wire unit are twisted and arranged on the outer periphery of the PVC sheath of the central layer.

The sheath includes a polyester tape layer, an aluminum-plastic composite tape layer, and an LDPE outer sheath layer sequentially from the inner layer to the outer layer.

In the specific implementation according to the above scheme, such as a cable with 25 pairs of wire groups, a 6x4+1x2 structure can be used, that is, the middle layer of the cable core is composed of a middle layer of 2 wire groups, and the twisted outer layer is composed of 6 4 wire groups. And in the 6 4-wire groups, every other 4-wire group is wrapped with polyester tape, which can solve the problem of crosstalk between units, and the outer sheath of the cable core is wrapped with polyester tape to improve the dielectric strength. And heat insulation, suitable for outdoor environments.

Due to the application of the above-mentioned technical scheme, the utility model has the following advantages compared with the prior art: the utility model effectively solves the problem of The problems of crosstalk and electromagnetic interference make this cable better adapt to the complex outdoor environment.

Description of drawings

Accompanying drawing 1 is a kind of optical cable sectional view implemented according to the technical solution of the utility model;

Among them: 1. Cable core; 11. Single wire; 111. Copper wire; 112. Insulation sleeve; 12. Center layer; 121. Center wire group; 122. PVC sheath; 123. Tear rope; 13. Stranded outer layer ; 131, polyester tape wrapped wire group unit; 1311, wire group; 1312, polyester tape; 132, common wire group unit; 1321, wire group; 1322, cable tie;

2. Sheath; 21. Polyester tape layer; 22. Aluminum-plastic composite tape layer; 23. LDPE outer sheath;

Detailed ways

Below in conjunction with accompanying drawing, illustrate in detail the specific content of preferred embodiment of the present utility model:

The cable shown in Figure 1 is mainly composed of a cable core 1 and a sheath 2 coated on the outer periphery of the cable core 1, wherein the cable core 1 is composed of a central layer 12 and a stranded outer layer 13, and the central layer 12 is composed of a The central line group 121 composed of insulated single wires 11 twisted in the center and the PVC sheath 122 wrapped around the center line group 121 is composed of a tearing rope 123 inside the PVC sheath 122 for easy peeling. . The insulated single wire 11 is composed of a 0.511 mm solid copper wire 111 and an HDPE insulating sheath 112 .

The stranded outer layer 13 includes three polyester tape wrapping wire group units 131 and three common wire group units 132, wherein each polyester tape wrapping wire group 131 is composed of four pairs of wire groups 1311 and longitudinally wrapped in four pairs The polyester tape 1312 on the outer periphery of the wire group 1311 is composed of, and the common wire group 132 is composed of four pairs of wire groups 1321 , and each wire group is also formed by twisting two insulated single wires 11 . The twisting pitch of the four-pair wire group of the polyester tape wrapping wire group unit 131 and the four-pair wire group unit 132 of the ordinary wire group unit should be different, so that the crosstalk between the adjacent four-pair wire group units meets the standard requirements, Four pairs of wire groups are wrapped with a layer of polyester tape with a thickness of 0.038mm to further improve the crosstalk index by increasing the distance between adjacent units; at the same time, the four pairs of wires of each wire group unit are wrapped outside the cable core when forming a cable. The cable ties 1322 of different chromatograms are used to distinguish different subunits, so as to facilitate the identification of chromatograms by dividing lines.

A pair of wire groups and six wire group units in the central layer 12 are stranded in the form of S-twisting or Z-twisting to form a cable core. When forming a cable, a layer of polyester tape with a thickness of 0.038mm is wrapped around the cable core 1 to form a polyester tape. The tape layer 21 can improve the insulation and withstand voltage characteristics and play the role of a heat insulating layer.

A layer of double-sided aluminum-plastic composite tape with a thickness of 0.2 mm is longitudinally wrapped on the outer periphery of the polyester tape layer 21 to form an aluminum-plastic composite tape layer 22, which can play a shielding and moisture-proof role. Finally, a layer of black LDPE material is extruded to form The outer sheath 23 can play the role of anti-ultraviolet so as to adapt to the outdoor environment. The above-mentioned polyester tape layer 21, aluminum-plastic composite tape layer 22 and outer sheath 23 constitute the sheath 2 of the cable.

The specific embodiments of the present invention are illustrated and described above, but the present invention is not limited to the above embodiments. All equivalent transformations made according to the utility model should be within the protection scope of the utility model.

Claims (7)

1. one kind big logarithm outdoor use cable for digital communication, it comprises by even number thoroughly does away with the cable core (1) that edge single line (11) forms, described cable core (1) is coated on wherein sheath (2), described every eradication edge single line (11) is by copper cash (111), the insulating case (112) that is coated on copper cash (111) periphery is formed, the mutually stranded being aligned group of per two described insulated single wires (11), it is characterized in that: described cable core (1) is divided into central core (12) and stranded skin (13), the PVC sheath (122) that described central core (12) is positioned at the center line group (121) at center by one and is coated on this center line group (121) periphery is formed, described stranded skin (13) is formed by a plurality of polyester belt lapped wire group unit (131) with the ordinary lines group unit (132) that a plurality of polyester belt lapped wire group unit (131) are provided with separately, and described polyester belt lapped wire group unit (131) and ordinary lines group unit (132) are arranged on PVC sheath (122) periphery of central core (12) mutually strandedly.

2. big logarithm outdoor use cable for digital communication according to claim 1, it is characterized in that: described each polyester belt lapped wire group unit (131) comprises a plurality of mutually stranded line groups (1311), the vertical polyester belt (1312) that wraps in this line group (1311) periphery, and described ordinary lines group unit (132) is by mutually stranded the forming of a plurality of line groups (1321).

3. big logarithm outdoor use cable for digital communication according to claim 2 is characterized in that: described polyester belt lapped wire group unit (131) and ordinary lines group unit (132) also include the band (1322) of tightening corresponding a plurality of line group and varying in color respectively.

4. big logarithm outdoor use cable for digital communication according to claim 1 is characterized in that: described central core (12) also comprise be arranged on PVC sheath (122) inboard tear rope (123).

5. big logarithm outdoor use cable for digital communication according to claim 1 is characterized in that: described sheath (2) comprises polyester belt (21), plastic-aluminum combined belt (22), LDPE outer jacket (23) successively from nexine to skin.

6. big logarithm outdoor use cable for digital communication according to claim 1 is characterized in that: described polyester belt lapped wire group unit (131) is different with the stranding twisting pitch of interior lines, ordinary lines group unit (132) group.

7. according to any described big logarithm outdoor use cable for digital communication in the claim 1 to 6, it is characterized in that: described polyester belt lapped wire group unit (131) and ordinary lines group unit (132) are respectively three, and stranded respectively in each polyester belt lapped wire group unit (131) and each the ordinary lines group unit (132) four line groups are arranged.

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