CN218414004U

CN218414004U - Low-attenuation 3-core communication cable with differential signal wire cores

Info

Publication number: CN218414004U
Application number: CN202220296171.3U
Authority: CN
Inventors: 王登峰; 邵千俊; 蔡长威; 王礼国; 丁志楠
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: 2023-01-31
Anticipated expiration: 2032-02-14

Abstract

The utility model discloses a take 3 core communication cable of low decay of differential signal sinle silk, including the power sinle silk, the transposition of drain wire and oval differential signal sinle silk common and iron powder polypropylene composite resin filler core constitutes the cable core, the outside cladding of cable core has the polyurethane oversheath, the power sinle silk includes first inner conductor and fluororesin insulating layer, the drain wire includes copper stranded conductor and PVC insulating layer, the differential signal sinle silk includes that two insulation core arrange side by side and form the line core body, the sinle silk outside cladding has the crowded package insulating layer of foamed polyethylene in proper order, PET resin area indulges package inoxidizing coating and copper foil layer, insulation core includes second inner conductor and the linear low density polyethylene insulating layer of silane grafting crosslinking, the PET resin area indulges and wraps the electroplating formation copper foil layer on the inoxidizing coating surface. The cable ensures the structural stability of the cable core, improves the transmission rate and the transmission stability of differential signals, reduces signal attenuation and ensures the excellent electrical characteristics of the cable.

Description

Low-attenuation 3-core communication cable with differential signal wire cores

Technical Field

The application belongs to the technical field of cables, and particularly relates to a low-attenuation 3-core communication cable with differential signal wire cores.

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 the equipment. 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. Shielded electrical cables are used in high speed data transmission applications involving electromagnetic interference (EMI) and/or Radio Frequency Interference (RFI). Electrical signals routed through shielded electrical cables may radiate less EMI/RFI to the external environment than electrical signals routed through unshielded electrical cables. Electrical signals transmitted through shielded cables may be better protected from environmental EMI/RFI than signals through unshielded cables. The signal conductors of shielded cables are typically arranged in pairs to carry differential signals. However, when a general multi-core cable is bent by extrusion, a plurality of cores inside the cable core are easily loosened and deformed, which easily causes the unstable structure of the differential signal cores, resulting in the deterioration of the characteristic impedance matching, the return loss and the attenuation performance of the differential signal cores, and the large signal attenuation, thereby affecting the signal transmission rate and the stability of the signal transmission, having weak noise interference resistance, and greatly affecting the electrical characteristics of the cable.

SUMMERY OF THE UTILITY MODEL

This application is not enough to prior art, and the technical problem that solve provides a take 3 core communication cable of low decay of difference signal sinle silk, ensures cable core structural stability, improves difference signal transmission rate and signal transmission stability, reduces the signal attenuation, improves the interference killing feature, ensures the excellent electrical characteristics of cable.

The present application solves the above-mentioned problems by the following technical solutions.

Take 3 core communication cable of low decay of differential signal sinle silk, including power sinle silk, drain wire and oval differential signal sinle silk jointly with the transposition of iron powder polypropylene composite resin filler core constitution cable core, the power sinle silk with the external diameter ratio of drain wire is 1.05 to 1, the major axis ratio of differential signal sinle silk is 1.25 to 1.5, the external diameter of power sinle silk is greater than the minor axis of differential signal sinle silk and is less than the major axis of differential signal sinle silk, the outside cladding of cable core has the polyurethane oversheath, the power sinle silk includes first inner conductor and fluororesin insulating layer, the drain wire includes copper strand wires conductor and PVC insulating layer, the differential signal sinle silk includes that two insulation sinle silks arrange side by side and form the line core, the line core outside cladding in proper order has crowded package insulating layer of foamed polyethylene, PET resin area to indulge and wraps insulating layer and copper foil layer, the insulation sinle silk includes second inner conductor and silane grafting cross-linked line low density polyethylene insulating layer, the PET resin area is indulged and is formed the cladding inoxidizing coating layer on the surface.

Preferably, the first inner conductor is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.04mm to 0.08 mm.

Preferably, the copper stranded conductor is formed by twisting and pressing a plurality of soft copper wires with the diameter of 0.02mm to 0.04 mm.

Preferably, the fluororesin insulation layer is a PFA, FEP or PTFE insulation layer.

Preferably, the copper foil layer has a thickness of 3 μm to 8 μm.

Preferably, the thickness of the PET resin belt longitudinal wrapping protective layer is 10-15 microns.

Preferably, the thickness of the foamed polyethylene extruded insulation layer is 0.5mm to 1.2mm.

Preferably, the thickness of the silane grafted and crosslinked linear low density polyethylene insulation layer is 0.1mm to 0.3mm.

Preferably, the fluororesin insulation layer has a thickness of not more than 0.5mm.

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

The beneficial effect of this application:

1. the external diameter ratio of the power wire core and the drain wire is optimized to be 1.05 to 1, the major-minor axis ratio of the differential signal wire core is 1.25 to 1.5, the external diameter of the power wire core is greater than the minor axis of the differential signal wire core and less than the major axis of the differential signal wire core, so that the cable core structure is balanced, by adding the iron powder polypropylene composite resin filling core material, the lateral pressure when the cable is bent is favorably improved, the wire core is prevented from being extruded and deformed, the circular cross section of the wire core body in a normal state is always kept, the occurrence of broken core and broken wire is favorably avoided, the oval differential signal wire core is thicker than the flat wire core, the structural strength of the differential signal wire core is favorably improved, the iron powder polypropylene composite resin filling core material is favorable for enhancing the shielding signal interference, absorbing the noise interference from the outside and converting the noise interference into heat, the external noise interference inhibiting capability is enhanced, and further, the differential signal transmission rate and the signal transmission stability are improved, the signal attenuation is reduced, the noise shielding characteristic is enhanced, and the excellent electrical performance is ensured.

2. The PET resin belt longitudinal wrapping protective layer is additionally arranged between the foamed polyethylene extruded insulating layer and the copper foil layer, the copper foil layer and the protective layer form an integrated structure, and when the cable bears lateral pressure and is bent, corresponding sliding friction is generated between the protective layer and the insulating layer, so that the copper foil layer is effectively prevented from cracking, and stable shielding characteristics are guaranteed.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present application.

Description of reference numerals:

the cable comprises a power wire core, a 2-drain wire, a 3-differential signal wire core, a 4-iron powder polypropylene composite resin filling core material, a 5-polyurethane outer sheath, a 6-first inner conductor, a 7-fluororesin insulating layer, an 8-copper stranded conductor, a 9-PVC insulating layer, a 10-insulating wire core, an 11-foamed polyethylene extruded insulating layer, a 12-PET resin tape longitudinally-wrapped protective layer, a 13-copper foil layer, a 14-second inner conductor and a 15-silane grafted crosslinked linear low-density polyethylene insulating layer.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer and more complete, the technical solutions of the present application will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Referring to fig. 1, the low attenuation 3-core communication cable with a differential signal core according to the embodiment of the present application includes a power core 1, a drain wire 2, and an elliptical differential signal core 3, which are twisted together with an iron powder polypropylene composite resin filler core 4 to form a cable core, wherein an outer diameter ratio of the power core 1 to the drain wire 2 is 1.05 to 1, a major-minor axis ratio of the differential signal core 3 is 1.25 to 1.5. The cable core is coated with a polyurethane outer sheath 5, and the thickness of the polyurethane outer sheath 5 is 0.5mm to 1.6mm.

The power supply wire core 1 comprises a first inner conductor 6 and a fluororesin insulation layer 7, and specifically, the first inner conductor 6 is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.04mm to 0.08 mm. The fluororesin insulation layer 7 is, for example, a PFA, FEP or PTFE insulation layer, and further, the fluororesin insulation layer 7 has a thickness of not more than 0.5mm. The drain wire 2 comprises a copper stranded conductor 8 and a PVC insulating layer 9, and specifically, the copper stranded conductor 8 is formed by twisting and pressing a plurality of soft copper wires with the diameter of 0.02mm to 0.04 mm. Differential signal sinle silk 3 includes that two insulation core 10 arrange side by side and form the line core, the outside cladding has crowded package insulating layer 11 of foamed polyethylene, PET resin area in proper order to indulge package inoxidizing coating 12 and copper foil layer 13 of line core, and the crowded package insulating layer 11 thickness of foamed polyethylene is preferred 0.5mm to 1.2mm. The copper foil layer 13 is formed on the outer surface of the PET resin tape longitudinal covering protective layer 12 in an electroplating mode, and further the thickness of the PET resin tape longitudinal covering protective layer 12 ranges from 10 micrometers to 15 micrometers. The copper foil layer 13 has a thickness of 3 to 8 μm. The insulated wire core 10 comprises a second inner conductor 14 and a silane grafted crosslinked linear low density polyethylene insulating layer 15, and further, the thickness of the silane grafted crosslinked linear low density polyethylene insulating layer 15 is 0.1mm to 0.3mm.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. Take 3 core communication cable of low decay of difference signal sinle silk, characterized by: including power sinle silk (1), drain wire (2) and oval differential signal sinle silk (3) jointly with iron powder polypropylene composite resin fill core (4) transposition constitution cable core, power sinle silk (1) with the external diameter ratio of drain wire (2) is 1.05 to 1, the major axis ratio of differential signal sinle silk (3) is 1.25 to 1.5, the external diameter of power sinle silk (1) is greater than the minor axis of differential signal sinle silk (3) and is less than the major axis of differential signal sinle silk (3), the outside cladding of cable core has polyurethane oversheath (5), power sinle silk (1) includes first inner conductor (6) and fluororesin insulating layer (7), drain wire (2) include copper strand wires conductor (8) and PVC insulating layer (9), differential signal sinle silk (3) includes that two insulation sinle silks (10) arrange side by side and form the line core, the outside cladding has polyethylene extruded package insulating layer (11), PET longitudinal tape resin package (12) and PVC insulating layer (9) in proper order, the linear resin package of foaming line core (13) forms the grafting polyethylene layer (13) on the linear low density polyethylene coating (13) the polyethylene coating layer (15) is included the polyethylene in the polyethylene.

2. The low attenuation 3-core communications cable with differential signal core as claimed in claim 1, wherein: the first inner conductor (6) is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.04mm to 0.08 mm.

3. The low attenuation 3-core communications cable with differential signal core as claimed in claim 1, wherein: the copper stranded wire conductor (8) is formed by twisting and pressing a plurality of soft copper wires with the diameter of 0.02mm to 0.04 mm.

4. The low attenuation 3-core communications cable with differential signal core as claimed in claim 1, wherein: the fluororesin insulation layer (7) is a PFA, FEP or PTFE insulation layer.

5. The low attenuation 3-core communications cable with differential signal core as claimed in claim 1, wherein: the thickness of the copper foil layer (13) is 3-8 μm.

6. The low attenuation 3-core communication cable with differential signal core as claimed in claim 1, wherein: the thickness of the PET resin tape longitudinal covering protective layer (12) is 10-15 micrometers.

7. The low attenuation 3-core communication cable with differential signal core as claimed in claim 1, wherein: the thickness of the foamed polyethylene extruded insulation layer (11) is 0.5mm to 1.2mm.

8. The low attenuation 3-core communications cable with differential signal core as claimed in claim 1, wherein: the thickness of the silane grafted cross-linked linear low-density polyethylene insulating layer (15) is 0.1mm to 0.3mm.

9. The low attenuation 3-core communication cable with differential signal core as claimed in claim 1, wherein: the thickness of the fluororesin insulation layer (7) is not more than 0.5mm.

10. The low attenuation 3-core communication cable with differential signal core as claimed in claim 1, wherein: the thickness of the polyurethane outer sheath (5) is 0.5mm to 1.6mm.