CN216250086U

CN216250086U - Small-diameter low-attenuation multi-core communication cable

Info

Publication number: CN216250086U
Application number: CN202122966026.XU
Authority: CN
Inventors: 黄建卫; 王成旺; 高旭皓; 邵千俊; 王登峰; 蔡长威; 刘书鑫
Original assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Current assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-04-08
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a small-diameter low-attenuation multi-core communication cable which comprises a first core body formed by twisting a plurality of communication wire cores, wherein the PFA hollow reinforcing core body is coated outside the first core body, a plurality of fan-shaped power wire cores are symmetrically arranged outside the PFA hollow reinforcing core body to form a second core body, an outer sheath is coated outside the second core body, each communication wire core comprises an inner conductor, a silane grafted cross-linked linear low-density polyethylene inner insulating layer, a PET resin tape wrapping protective layer, a copper foil layer, a copper wire wrapping shielding layer and an outer insulating layer, the outer diameter of the outer insulating layer is not more than 2mm, and each fan-shaped power wire core comprises a fan-shaped tinned copper wire conductor and a PFA insulating layer. On the basis of the diameter reduction manufacturing, the flexibility and the bending resistance of the cable are ensured, the noise shielding performance is stable, the attenuation of high-frequency signals is reduced, and the cable is durable in use.

Description

Small-diameter low-attenuation multi-core communication cable

Technical Field

The utility model relates to the technical field of cables, in particular to a small-diameter low-attenuation multi-core communication cable.

Background

Electromagnetic noise environments tend to be quite complex in industrial applications, and the radiation or conduction (EMI) of electromagnetic noise can significantly interfere with the proper operation of electromechanical devices. In this process, an important carrier for electromagnetic noise propagation is various cables used in production line equipment. Some of them are noise sources and some are disturbed objects. One very important way to combat electromagnetic noise interference on electrical lines is to use shielded cables. In an automated industrial production line, a multi-core cable is generally used for a tow chain system, a robot, a mobile drive system, and the like, however, the environment is complicated in an industrial application site, the general multi-core cable has poor bending resistance, and after repeated bending, the attenuation of a long-distance transmission signal is large, the shielding effect is unstable, and the electrical characteristics are greatly affected.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a small-diameter low-attenuation multi-core communication cable, which ensures the flexibility and the bending resistance of the cable on the basis of the small-diameter manufacture, has stable noise shielding performance, is beneficial to reducing the attenuation of high-frequency signals and is durable in use.

The utility model solves the technical problems through the following technical scheme.

The small-diameter low-attenuation multi-core communication cable comprises a first core body formed by twisting a plurality of communication wire cores, a PFA hollow reinforcing core body is coated outside the first core body, a plurality of fan-shaped power wire cores are symmetrically arranged outside the PFA hollow reinforcing core to form a second wire core, the second wire core body is coated with an outer sheath, the communication wire core comprises an inner conductor, a silane grafted cross-linked linear low-density polyethylene inner insulating layer, a PET resin tape wrapping protective layer, a copper foil layer, a copper wire wrapping shielding layer and an outer insulating layer which are sequentially coated outside the inner conductor, the thickness of the wrapping protective layer of the PET resin tape is 5-18 mu m, the thickness of the copper foil layer is 2-5 mu m, the external diameter of outer insulating layer is no more than 2mm, fan-shaped power sinle silk reaches fan-shaped tin-plated copper wire conductor outside cladding has the PFA insulating layer.

Preferably, the inner conductor is formed by stranding a plurality of tinned copper monofilaments, and the wire diameter of each tinned copper monofilament is 0.01mm to 0.03 mm.

Preferably, the PET resin tape wrapping protective layer is a PET resin tape multi-layer lapping and covering wrapping structure, and the thickness of the PET resin tape is 3-8 μm.

Preferably, the copper wire lapping shielding layer is formed by spirally winding an inner layer tin-plated copper monofilament and an outer layer tin-plated copper monofilament in the same direction, the winding distance and the helix angle of the inner layer tin-plated copper monofilament and the outer layer tin-plated copper monofilament are the same, the diameter of the inner layer tin-plated copper monofilament is 0.06mm to 0.12mm, the diameter of the outer layer tin-plated copper monofilament is 0.08mm to 0.14mm, and the diameter of the inner layer tin-plated copper monofilament is not more than 90% of the diameter of the outer layer tin-plated copper monofilament.

Preferably, the outer insulating layer is a silane-grafted cross-linked high-density polyethylene insulating layer.

Preferably, the outer diameter of the outer insulating layer is not less than 1.2 mm.

Preferably, the PFA hollow reinforcing core comprises an inner cylinder and an outer cylinder, and a plurality of connecting plates are radially and uniformly distributed between the inner cylinder and the outer cylinder.

Preferably, the fan-shaped tinned copper wire conductor is formed by twisting a plurality of tinned copper stranded wires in a compound mode and tightly pressing the tinned copper stranded wires into a fan-shaped structure, and each tinned copper stranded wire is formed by twisting a plurality of tinned copper wire bundles.

Preferably, the outer sheath is a polyurethane outer sheath.

Preferably, the outer sheath has a thickness of 0.5mm to 2.2 mm.

The utility model has the following beneficial effects:

1. the PFA hollow reinforcing core body is arranged between the first core body and the second core body, PFA resin is low in conductivity, high-frequency signal transmission characteristics are improved beneficially, attenuation is small, the PFA hollow reinforcing core body with the hollow structure can effectively bear lateral pressure during bending, bending resistance of the cable is greatly improved, conductor breakage is effectively prevented, and durability is better.

2. The silane grafted cross-linked linear low-density polyethylene inner insulating layer is externally wrapped with a PET resin tape to wrap the protective layer, so that the protective layer and the inner insulating layer are independent from each other, adhesion can not occur, when a cable is bent, corresponding sliding friction is generated between the protective layer and the insulating layer, the copper foil layer is effectively prevented from being broken, a stable shielding effect is ensured, the attenuation of high-frequency signals is small, and the electrical characteristics are stable and reliable.

3. The fan-shaped tinned copper wire conductor is formed by twisting a plurality of tinned copper stranded wires again and is compressed into a fan-shaped structure, and the tinned copper stranded wires are formed by twisting a plurality of tinned copper wire bundles, so that the twisting stress of the tinned copper wires is reduced, the deformation of the copper wires is inhibited, the tensile strength and the stability of the fan-shaped tinned copper wire conductor are improved, and the wire breakage is not easy to occur.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional structural view of an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structure diagram of a communication wire core according to an embodiment of the present invention.

In the figure: 1-communication wire core, 11-inner conductor, 12-silane grafted cross-linked linear low-density polyethylene inner insulating layer, 13-PET resin tape wrapping protective layer, 14-copper foil layer, 15-copper wire wrapping shielding layer, 16-outer insulating layer, 2-PFA hollow reinforcing core, 21-inner cylinder, 22-outer cylinder, 23-connecting plate body, 3-fan-shaped power wire core, 31-fan-shaped tinned copper wire conductor, 32-PFA insulating layer and 4-outer sheath.

Detailed Description

In order to more clearly illustrate the utility model, the utility model is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the utility model.

Referring to fig. 1, the small-diameter low-attenuation multi-core communication cable according to the embodiment of the present invention includes a plurality of communication cores 1 twisted to form a first core body, in this embodiment, three communication cores 1. Referring to fig. 2, the communication wire core 1 includes an inner conductor 11, and a silane-grafted cross-linked linear low-density polyethylene inner insulating layer 12, a PET resin tape wrapping protection layer 13, a copper foil layer 14, a copper wire wrapping shielding layer 15 and an outer insulating layer 16 which are sequentially coated outside the inner conductor 11, specifically, the inner conductor 11 is formed by twisting a plurality of tin-plated copper monofilaments, and the diameter of each tin-plated copper monofilament is 0.01mm to 0.03 mm. The thickness of the PET resin tape wrapping protective layer 13 is 5 μm to 18 μm, for example, the PET resin tape wrapping protective layer 13 is a PET resin tape multi-layer lapping and wrapping structure, and the thickness of the PET resin tape is 3 μm to 8 μm. The copper foil layer 14 has a thickness of 2 to 5 μm. In one embodiment, the copper wire wrapping shielding layer 15 is formed by spirally winding inner and outer double-layer tinned copper monofilaments in the same direction, the winding distance and the spiral angle degree of the inner layer tinned copper monofilaments are the same as those of the outer layer tinned copper monofilaments, the diameter of each inner layer tinned copper monofilament is 0.06mm to 0.12mm, the diameter of each outer layer tinned copper monofilament is 0.08mm to 0.14mm, and the diameter of each inner layer tinned copper monofilament is not more than 90% of that of each outer layer tinned copper monofilament. The outer insulating layer 16 is, for example, a silane-grafted cross-linked high-density polyethylene insulating layer. The outer diameter of the outer insulating layer 16 is not more than 2mm, and further, the outer diameter of the outer insulating layer 16 is not less than 1.2 mm.

The first bobbin body is externally coated with a PFA hollow reinforcing bobbin body 2, further, the PFA hollow reinforcing bobbin body 2 includes an inner cylinder 21 and an outer cylinder 22, and a plurality of connecting plate bodies 23 are radially and uniformly distributed between the inner cylinder 21 and the outer cylinder 22.

The PFA hollow reinforcing core body 2 is externally and symmetrically provided with a plurality of fan-shaped power supply wire cores 3 to form a second wire core body, and in the embodiment, the number of the fan-shaped power supply wire cores 3 is five. Fan-shaped power sinle silk 3 includes fan-shaped tinned copper wire conductor 31 and fan-shaped tinned copper wire conductor 31 outside cladding has PFA insulating layer 32, specific speaking, fan-shaped tinned copper wire conductor 31 is that a plurality of tinned copper stranded wires strand wires form again and sticiss into fan-shaped structure, the tinned copper stranded wire comprises a plurality of tinned copper wire bundle strands. The second wire core body is externally coated with an outer sheath 4, the outer sheath 4 is a polyurethane outer sheath, and the thickness of the outer sheath 4 is 0.5mm to 2.2 mm.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims

1. The small-diameter low-attenuation multi-core communication cable is characterized in that: including a plurality of communication sinle silk (1) transposition constitution first line core body, the outside cladding of first line core body has PFA cavity reinforcement core body (2), PFA cavity reinforcement core body (2) outside symmetrical arrangement a plurality of fan-shaped power sinle silk (3) constitute second line core body, the outside cladding of second line core body has oversheath (4), communication sinle silk (1) include inner conductor (11) and cladding in proper order in the outside silane grafting cross-linking linear low density polyethylene inner insulating layer (12) of inner conductor (11), PET resin area are around package inoxidizing coating (13), copper foil layer (14), copper line are around package shielding layer (15) and outer insulating layer (16), the PET resin area is 5 mu m to 18 mu m around package inoxidizing coating (13) thickness, copper foil layer (14) thickness is 2 mu m to 5 mu m, the external diameter of outer insulating layer (16) is no more than 2mm, the fan-shaped power supply wire core (3) comprises a fan-shaped tinned copper wire conductor (31) and a PFA insulating layer (32) is coated outside the fan-shaped tinned copper wire conductor (31).

2. The small diameter low attenuation multi-core communication cable of claim 1, wherein: the inner conductor (11) is formed by stranding a plurality of tinned copper monofilaments, and the wire diameter of each tinned copper monofilament is 0.01 mm-0.03 mm.

3. The small diameter low attenuation multi-core communication cable of claim 1, wherein: the PET resin tape wrapping protective layer (13) is of a PET resin tape multi-layer lapping and covering wrapping structure, and the thickness of the PET resin tape is 3-8 mu m.

4. The small diameter low attenuation multi-core communication cable of claim 1, wherein: the copper wire is around package shielding layer (15) and is formed for the equidirectional spiral winding of inside and outside double-deck tin-plated copper monofilament, and the winding distance and the helix angle degree of inner layer tin-plated copper monofilament is the same with outer tin-plated copper monofilament, inner layer tin-plated copper monofilament line footpath is 0.06mm to 0.12mm, outer tin-plated copper monofilament line footpath is 0.08mm to 0.14mm, inner layer tin-plated copper monofilament line footpath does not exceed 90% of outer tin-plated copper monofilament line footpath.

5. The small diameter low attenuation multi-core communication cable of claim 1, wherein: the outer insulating layer (16) is a silane grafted cross-linked high-density polyethylene insulating layer.

6. The small diameter low attenuation multi-core communication cable of claim 1, wherein: the outer diameter of the outer insulating layer (16) is not less than 1.2 mm.

7. The small diameter low attenuation multi-core communication cable of claim 1, wherein: the PFA hollow reinforcing core body (2) comprises an inner cylinder body (21) and an outer cylinder body (22), and a plurality of connecting plate bodies (23) are radially and uniformly distributed between the inner cylinder body (21) and the outer cylinder body (22).

8. The small diameter low attenuation multi-core communication cable of claim 1, wherein: the fan-shaped tinned copper wire conductor (31) is formed by twisting a plurality of tinned copper stranded wires repeatedly and tightly pressing the tinned copper stranded wires into a fan-shaped structure, and each tinned copper stranded wire is formed by twisting a plurality of tinned copper wire bundles.

9. The small diameter low attenuation multi-core communication cable of claim 1, wherein: the outer sheath (4) is a polyurethane outer sheath.

10. The small diameter low attenuation multi-core communication cable of claim 1, wherein: the thickness of the outer sheath (4) is 0.5mm to 2.2 mm.