CN217361149U

CN217361149U - Bending-resistant long-distance low-attenuation communication cable

Info

Publication number: CN217361149U
Application number: CN202220296173.2U
Authority: CN
Inventors: 邵千俊; 王登峰; 蔡长威; 刘书鑫; 王礼国
Original assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Current assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-09-02
Anticipated expiration: 2032-02-14

Abstract

The utility model discloses a low decay communication cable of crooked long distance, including inner conductor, silane grafting crosslinked linear low density polyethylene crowded package insulating layer, metallic shield layer and polyurethane oversheath, the clearance all is filled with insulating lubricating silicone grease between silane grafting crosslinked linear low density polyethylene crowded package insulating layer and the metallic shield layer and the clearance between metallic shield layer and the polyurethane oversheath, the metallic shield layer is the vertical lid that overlaps of copper plastic composite tape covers the structure, and copper plastic composite tape includes PET film base, and the interior nexine of PET film base is electroplated respectively on the surface and is formed with the copper foil layer, and the thickness of PET film base does 4 times to 12 times of copper foil layer thickness. The cable has excellent bending resistance and flexibility, effectively prevents the shielding layer from being broken, has more stable shielding performance, small attenuation of long-distance transmission of high-frequency signals, reliable electrical performance and durable use.

Description

Bending-resistant long-distance low-attenuation communication cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a low decay communication cable of resistant crooked long distance.

Background

The coaxial cable needs to have good flexibility and shielding performance. Industrial application field environments are complicated, and in an automated industrial manufacturing line, electrical connection and control of small robots, electronic machines, and the like are required to be applied to a coaxial cable having high flexibility and bending resistance, and such a coaxial cable must also have good guarantee in electrical characteristics for long-distance transmission. However, after a common coaxial cable is repeatedly bent for a long time, sliding friction is generated between the metal shielding layer and the insulating layer of the copper foil layer, which easily causes the problem of copper foil layer fracture, resulting in unstable shielding effect, large attenuation of long-distance transmission signals, and great influence on electrical characteristics.

Disclosure of Invention

The utility model discloses to prior art not enough, the technical problem that solve provides a low decay communication cable of resistant crooked long distance, has excellent bending resistance and pliability, prevents effectively that the shielding layer fracture from taking place, and shielding property is more stable, and high frequency signal long distance transmission decrement is little, and electric properties is reliable, durable use.

The utility model discloses a make above-mentioned technical problem solve through following technical scheme.

The bending-resistant long-distance low-attenuation communication cable comprises an inner conductor, a silane grafted cross-linked linear low-density polyethylene extruded insulation layer, a metal shielding layer and a polyurethane outer sheath, wherein the silane grafted cross-linked linear low-density polyethylene extruded insulation layer, the metal shielding layer and the polyurethane outer sheath are sequentially coated outside the inner conductor, the inner conductor is formed by twisting a plurality of tin-plated copper monofilaments with the wire diameter of 0.05mm to 0.16mm, the twisting pitch is 20 to 50 times of the wire diameter, the gaps between the silane grafted crosslinked linear low-density polyethylene extruded insulation layer and the metal shielding layer and between the metal shielding layer and the polyurethane outer sheath are filled with insulating lubricating silicone grease, the metal shielding layer is of a longitudinal lapping cover covering structure of a copper-plastic composite belt, the copper-plastic composite belt comprises a PET film base layer, copper foil layers are formed on the inner layer surface and the outer layer surface of the PET film base layer in an electroplating mode respectively, and the thickness of the PET film base layer is 4-12 times of that of the copper foil layers.

Preferably, the longitudinal overlapping range of the copper-plastic composite belt is 10-25% of the outer diameter of the silane grafted cross-linked linear low-density polyethylene extruded insulation layer.

Preferably, the copper foil layer has a thickness of 5 μm to 10 μm.

Preferably, the thickness of the PET film base layer is 25 to 50 micrometers.

Preferably, the polyurethane outer sheath has a thickness of 0.5mm to 1.6 mm.

Preferably, the outer diameter of the inner conductor does not exceed 1.8 mm.

Preferably, the outer diameter of the inner conductor is not less than 1 mm.

Preferably, the thickness of the silane grafted cross-linked linear low density polyethylene extruded insulation layer is 0.3mm to 1.5 mm.

The utility model has the advantages as follows:

1. through adding insulating lubricating silicone grease as antifriction composite medium for obtain abundant antifriction effect between ectonexine copper foil layer respectively and insulating layer and the oversheath, when the cable in the bending process that relapses, produce corresponding antifriction and slide between shielding layer and insulating layer and the oversheath, do not carry out follow-up bending, the fracture of ectonexine copper foil layer is effectually prevented, guarantee stable shielding effect, high frequency signal decrement is little on long distance transmission, the electrical characteristic is reliable and stable, durability is better.

2. The inner and outer copper foil layers form a shielding conductor, so that the shielding performance is enhanced, the attenuation of high-frequency signals is reduced, the anti-interference capability is improved, and the stable and reliable electrical characteristics are ensured.

3. The diameter of a tinned copper monofilament wire adopted by the inner conductor is 0.05mm to 0.16mm, the tensile strength is high, the inner conductor is guaranteed to have good electrical characteristics for long-distance signal transmission, the lay length of the inner conductor is 20 to 50 times of the outer diameter of the inner conductor, and on the basis of diameter thinning manufacturing, the good electrical characteristics and the bending resistance can be achieved.

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 described 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 without creative efforts.

Fig. 1 is a schematic sectional structure diagram of an embodiment of the present invention.

In the figure: 1-inner conductor, 2-silane grafted cross-linked linear low-density polyethylene extruded insulation layer, 3-metal shielding layer, 4-polyurethane outer sheath and 5-insulating lubricating silicone grease.

Detailed Description

In order to explain the present invention more clearly, the present invention will be further described with reference to the preferred embodiments and the accompanying drawings. Similar components 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 invention.

Referring to fig. 1, the bending-resistant long-distance low-attenuation communication cable according to an embodiment of the present invention includes an inner conductor 1, where the inner conductor 1 is formed by twisting a plurality of tin-plated copper monofilaments with a wire diameter of 0.05mm to 0.16mm, and a lay length is 20 to 50 times of the wire diameter, further, an outer diameter of the inner conductor 1 is not less than 1mm, and an outer diameter of the inner conductor 1 is not more than 1.8 mm.

And the outer part of the inner conductor 1 is sequentially coated with a silane grafted cross-linked linear low-density polyethylene extruded insulating layer 2, a metal shielding layer 3 and a polyurethane outer sheath 4. Preferably, the thickness of the silane grafted cross-linked linear low density polyethylene extruded insulation layer 2 is 0.3mm to 1.5 mm. And insulating lubricating silicone grease 5 is filled in a gap between the silane grafted crosslinked linear low-density polyethylene extruded insulation layer 2 and the metal shielding layer 3 and a gap between the metal shielding layer 3 and the polyurethane outer sheath 4. The metal shielding layer 3 is a longitudinal overlapping cover covering structure of the copper-plastic composite belt, and further, the longitudinal overlapping cover amplitude of the copper-plastic composite belt is 10% -25% of the outer diameter of the silane grafted crosslinked linear low-density polyethylene extruded insulation layer 2. The copper-plastic composite belt comprises a PET film base layer, wherein copper foil layers are formed on the inner layer surface and the outer layer surface of the PET film base layer in an electroplating mode respectively, the thickness of the PET film base layer is 4-12 times of that of the copper foil layers, the thickness of the copper foil layers is 5-10 micrometers, and the thickness of the PET film base layer is 25-50 micrometers. Preferably, the polyurethane outer sheath 4 has a thickness of 0.5mm to 1.6 mm.

Obviously, the above 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 is obvious for those skilled in the art to make other variations or changes based on the above descriptions, and all the embodiments cannot be exhausted here, and all the obvious variations or changes that belong to the technical solutions of the present invention are still in the protection scope of the present invention.

Claims

1. Resistant crooked long distance low attenuation communication cable, characterized by: comprises an inner conductor (1), a silane grafted cross-linked linear low-density polyethylene extruded insulation layer (2), a metal shielding layer (3) and a polyurethane outer sheath (4) which are sequentially coated outside the inner conductor (1), the inner conductor (1) is formed by twisting a plurality of tinned copper monofilaments with the wire diameter of 0.05mm to 0.16mm, the lay length is 20 to 50 times of the wire diameter, the clearance between the silane grafted crosslinked linear low-density polyethylene extruded insulation layer (2) and the metal shielding layer (3) and the clearance between the metal shielding layer (3) and the polyurethane outer sheath (4) are filled with insulating lubricating silicone grease (5), the metal shielding layer (3) is of a longitudinal lapping cover covering structure of a copper-plastic composite belt, the copper-plastic composite belt comprises a PET film base layer, copper foil layers are formed on the inner layer surface and the outer layer surface of the PET film base layer in an electroplating mode respectively, and the thickness of the PET film base layer is 4-12 times of that of the copper foil layers.

2. The bend resistant long haul low attenuation communication cable of claim 1, wherein: the longitudinal overlapping range of the copper-plastic composite belt is 10-25% of the outer diameter of the silane grafted cross-linked linear low-density polyethylene extruded insulation layer (2).

3. The bend resistant long haul low attenuation communication cable of claim 1, wherein: the thickness of the copper foil layer is 5-10 μm.

4. The bend resistant long haul low attenuation communication cable of claim 1, wherein: the thickness of the PET film base layer is 25-50 microns.

5. The bend resistant long haul low attenuation communication cable of claim 1, wherein: the thickness of the polyurethane outer sheath (4) is 0.5mm to 1.6 mm.

6. The bend-resistant long-reach low-attenuation communications cable of claim 1, wherein: the outer diameter of the inner conductor (1) is not more than 1.8 mm.

7. The bend resistant long haul low attenuation communication cable of claim 1, wherein: the outer diameter of the inner conductor (1) is not less than 1 mm.

8. The bend resistant long haul low attenuation communication cable of claim 1, wherein: the thickness of the silane grafted cross-linked linear low-density polyethylene extruded insulation layer (2) is 0.3mm to 1.5 mm.