CN216596983U - Soft low-attenuation multi-core cable - Google Patents

Abstract

The utility model discloses a soft low-attenuation multi-core cable which comprises two power wire cores, a control wire core and a plurality of PFA resin core pipes which are jointly twisted to form a cable core, wherein a chloroprene rubber outer sheath is coated outside the cable core, the power wire core comprises a power wire core body formed by six insulation wire cores which are concentrically twisted around a core material of a counterpoint type wholly aromatic copolyamide tensile fiber center, a polyurethane outer insulation layer is coated outside the power wire core body, the insulation wire core comprises a first inner conductor and a fluororesin inner insulation layer, the control wire core is formed by two communication wire cores which are arranged in parallel, a disturbance rejection wire and a filling core strip which are uniformly distributed in a cross shape and are jointly twisted, and a copper foil tape wrapping layer, a PET resin tape wrapping layer, a shielding mesh conductor layer and a PVC outer insulation layer are sequentially coated outside the control wire core body. The cable is better in flexibility, the difficulty of laying and installing processes is reduced, the internal structure of the communication wire core is balanced, and the signal attenuation is greatly reduced.

Description

Soft low-attenuation multi-core cable

Technical Field

The application belongs to the technical field of cables, and particularly relates to a soft low-attenuation multi-core cable.

Background

The communication cable is used for forming a channel for transmitting information to form a four-way and eight-way communication network. The method can be distinguished according to the aspects of laying, operating conditions, transmission frequency spectrum, cable core structure, insulating materials and the like. Due to rapid development of transmission technology, maintenance testing technology, and the like, communication cables are gradually becoming smaller in diameter and lighter in weight, and at the same time, the communication cables are also required to have good impedance characteristics, electrical insulation properties, and chemical stability. In the cable laying installation process, the softness performance of the cable is particularly important, the poor softness performance brings the installation difficulty, the laying process difficulty is large, in addition, under the condition of fine diameter manufacturing, the shielding characteristic of the cable also needs to be considered, if the distance between the copper foil layer and the periphery of the cable core body in the internal structure of the communication cable core is not uniform, the signal attenuation is large, the unstable shielding effect occurs, the anti-noise interference capability is weak, and the electrical characteristic of the cable is greatly influenced.

SUMMERY OF THE UTILITY MODEL

This application is not enough to prior art, and the technical problem that solve provides a low decay multicore cable of gentle type, and based on thin footpath ization preparation, the compliance is better, reduces the installation process degree of difficulty that lays, and communication sinle silk inner structure is balanced, the signal attenuation that significantly reduces, and noise shielding performance is stable, and the interference killing feature is strong, the excellent electrical characteristics of guarantee cable.

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

A soft low-attenuation multi-core cable comprises two power supply wire cores, a control wire core and a plurality of PFA resin core pipes which are jointly twisted to form a cable core, wherein the outer diameter ratio of the power supply wire cores to the control wire core is 1: 0.95-1: 1, the cable core is externally wrapped with a chloroprene rubber outer sheath, the power supply wire cores comprise power supply wire cores formed by concentrically twisting six insulation wire cores around a contraposition type wholly aromatic copolyamide drawing fiber central core material, the power supply wire cores are externally wrapped with a polyurethane outer insulation layer, each insulation wire core comprises a first inner conductor and a fluororesin inner insulation layer, the first inner conductor is formed by concentrically twisting a plurality of tinned copper monofilaments with the wire diameters of 0.12 mm-0.28 mm, the thickness of the fluororesin inner insulation layer is at least one half of the wire diameters of the tinned copper monofilaments, the control wire cores are formed by parallelly arranging two communication wire cores, uniformly distributing a drain wire and a filler strip in a cross shape and jointly twisting the control wire cores, the outside cladding in proper order of control wire core has the copper foil tape around covering, PET resin area around covering, shielding mesh conductor layer and PVC external insulation layer, the communication sinle silk includes second inner conductor and PE inner insulation layer.

Preferably, the thickness of the fluororesin inner insulating layer does not exceed the diameter of the tinned copper monofilament.

Preferably, the drain wire is a copper stranded wire, the filling core strip is formed by twisting para-type wholly aromatic copolyamide drawn fibers and stainless steel wires, and the ratio of the outer diameter of the filling core strip to the outer diameter of the drain wire is 1.05:1 to 1.12: 1.

Preferably, the first inner conductor has a diameter of 3mm to 4 mm.

Preferably, the second inner conductor is formed by stranding a plurality of tinned copper wires with the diameter of 0.04mm to 0.08 mm.

Preferably, the shielding mesh conductor layer is formed by mixing and spirally winding two tinned copper wires with different wire diameters and a wire diameter ratio of 0.9-1, the wire diameter of each tinned copper wire is 0.01-0.04 mm, and the weaving density is 92-95%.

Preferably, the thickness of the PE inner insulating layer is not more than 0.5mm, and the thickness of the PVC outer insulating layer is 0.5mm to 1.2 mm.

Preferably, the thickness of the chloroprene rubber outer sheath is 1.5mm to 2.8 mm.

Preferably, the thickness of the polyurethane external insulation layer is 0.6mm to 1 mm.

Preferably, the lay length of the cable core is 10 to 20 times of the outer diameter of the power wire core.

The beneficial effect of this application:

1. the outer diameter ratio of the power supply wire core to the control wire core is optimized to be 1: 0.95-1: 1, the circular section of the cable is ensured, the flexibility and the bending resistance of the cable are improved, the PFA resin core pipe is added into the cable core, so that the cable can better bear the lateral pressure during bending, the flexibility of the cable is better, the difficulty of the laying and installation process is reduced, the adaptability of the laying working condition is stronger, the phenomena of core breaking and wire breaking of the first inner conductor, the second inner conductor and the shielding mesh conductor layer are greatly reduced, and the durability and the usability are better.

2. The filling core strips are symmetrically added to the positions of the drain wire in the control wire core, the outer diameter ratio of the filling core strips to the drain wire is optimized to be 1.05: 1-1.12: 1, so that the cross section structure of the control wire core is balanced, a copper foil tape and the outside of the control wire core are favorably sealed and kept at a constant distance, the signal attenuation is favorably reduced, the shielding mesh conductor layer and the copper foil tape wrapping layer jointly form a shielding conductor, the stability of the shielding performance is enhanced, the anti-interference capability of external noise is improved, and the electrical characteristics of the cable are further ensured.

3. The first inner conductor is formed by concentrically twisting tinned copper monofilaments with the wire diameter of 0.12mm to 0.28mm, the tensile strength is high, and good electrical characteristics and bending resistance can be achieved on the basis of diameter reduction manufacturing.

4. The tensile elastic modulus of the core material of the para-type wholly aromatic copolyamide tensile fiber is high, the power core can better bear the lateral pressure of the cable during bending, the tensile property of the power core is improved, the bending resistance is enhanced, the occurrence of core breaking and wire breaking is reduced, the good electrical performance is ensured, and the cable is durable in use.

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 supply wire core, a control wire core, a 3-PFA resin core pipe, a 4-chloroprene rubber outer sheath, a 5-insulating wire core, a 6-para-type wholly aromatic copolyamide drawn fiber central core material, a 7-polyurethane outer insulating layer, an 8-first inner conductor, a 9-fluororesin inner insulating layer, a 10-communication wire core, an 11-drain wire, a 12-filling core strip, a 13-copper foil tape wrapping layer, a 14-PET resin tape wrapping layer, a 15-shielding mesh conductor layer, a 16-PVC outer insulating layer, a 17-second inner conductor and an 18-PE inner insulating layer.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely 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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, the flexible low-attenuation multi-core cable according to the embodiment of the present application includes two power supply cores 1, a control core 2, and a plurality of PFA resin core tubes 3, which are twisted together to form a cable core, wherein an outer diameter ratio of the power supply cores 1 to the control core 2 is 1:0.95 to 1:1, and further, a lay length of the cable core is 10 to 20 times of the outer diameter of the power supply cores 1. The cable core is coated with a chloroprene rubber outer sheath 4, preferably, the thickness of the chloroprene rubber outer sheath 4 is 1.5mm to 2.8 mm.

The power cord core 1 comprises a power cord core body formed by concentrically twisting six insulation cord cores 5 around a contraposition type wholly aromatic copolyamide drawn fiber center core material 6, wherein a polyurethane outer insulation layer 7 is coated outside the power cord core body, and the thickness of the polyurethane outer insulation layer 7 is preferably 0.6mm to 1 mm. The insulation core 5 includes first inner conductor 8 and fluororesin inner insulation layer 9, first inner conductor 8 is the concentric transposition of a plurality of line footpaths 0.12mm to 0.28 mm's tin-plated copper monofilament and constitutes, and is further, first inner conductor 8 diameter is 3mm to 4 mm. The thickness of the fluororesin inner insulating layer 9 is at least one half of the diameter of the tinned copper monofilament, and further, the thickness of the fluororesin inner insulating layer 9 does not exceed the diameter of the tinned copper monofilament.

The control wire core 2 is formed by parallelly arranging two communication wire cores 10, uniformly distributing the two communication wire cores in a cross shape with a drain wire 11 and a filling core strip 12 and twisting the two communication wire cores together, specifically, the drain wire 11 is a copper stranded wire, the filling core strip 12 is formed by twisting a para-type wholly aromatic copolyamide drawn fiber and a stainless steel wire, and the ratio of the outer diameter of the filling core strip 12 to the outer diameter of the drain wire 11 is 1.05:1 to 1.12: 1. The outside cladding in proper order of control wire core has the copper foil tape around covering 13, PET resin area around covering 14, shielding mesh conductor layer 15 and PVC external insulation layer 16, in an embodiment, shielding mesh conductor layer 15 is two kinds of different line footpaths and the mixed one-way spiral winding of tinned copper wire between 0.9 to 1 of line footpath ratio and constitutes, tinned copper wire line footpath is 0.01mm to 0.04mm, and the density of weaving is 92% to 95%. The communication wire core 10 comprises a second inner conductor 17 and a PE inner insulating layer 18, specifically, the second inner conductor 17 is formed by stranding a plurality of tinned copper wires with the diameters of 0.04mm to 0.08mm, the thickness of the PE inner insulating layer 18 is not more than 0.5mm, and the thickness of the PVC outer insulating layer 16 is 0.5mm to 1.2 mm.

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 (10)

1. The soft low-attenuation multi-core cable is characterized in that: the cable comprises two power supply wire cores (1), a control wire core (2) and a plurality of PFA resin core pipes (3) which are jointly twisted to form a cable core, wherein the outer diameter ratio of the power supply wire cores (1) to the control wire core (2) is 1: 0.95-1: 1, a chloroprene rubber outer sheath (4) is coated outside the cable core, the power supply wire cores (1) comprise power line cores formed by concentrically twisting six insulation wire cores (5) around a contraposition type wholly aromatic copolyamide drawing fiber center core (6), a polyurethane outer insulation layer (7) is coated outside the power line cores, each insulation wire core (5) comprises a first inner conductor (8) and a fluororesin inner insulation layer (9), each first inner conductor (8) is formed by concentrically twisting a plurality of tinned copper monofilaments with the wire diameter of 0.12 mm-0.28 mm, and the thickness of each fluororesin inner insulation layer (9) is at least one half of the tinned copper monofilament diameter, control sinle silk (2) are cross equipartition and twist jointly and form the control core body with a drain wire (11) and a packing core strip (12) by two communication sinle silks (10) parallel settings, the outside cladding in proper order of control core body has the copper foil tape around covering (13), PET resin area around covering (14), shielding mesh conductor layer (15) and PVC external insulation layer (16), communication sinle silk (10) include second inner conductor (17) and PE inner insulation layer (18).

2. The flexible, low-attenuation, multi-core cable of claim 1, further comprising: the thickness of the fluororesin inner insulating layer (9) does not exceed the diameter of the tinned copper monofilament.

3. The flexible, low-attenuation, multi-core cable of claim 1, further comprising: the drain wire (11) is a copper stranded wire, the filling core strip (12) is formed by twisting para-type wholly aromatic copolyamide drawn fibers and stainless steel wires, and the ratio of the outer diameter of the filling core strip (12) to the outer diameter of the drain wire (11) is 1.05:1 to 1.12: 1.

4. The flexible, low-attenuation, multi-core cable of claim 1, further comprising: the diameter of the first inner conductor (8) is 3mm to 4 mm.

5. The flexible, low-attenuation, multi-core cable of claim 1, further comprising: the second inner conductor (17) is formed by stranding a plurality of tinned copper wires with the diameter of 0.04mm to 0.08 mm.

6. The flexible, low-attenuation, multi-core cable of claim 1, further comprising: the shielding mesh conductor layer (15) is formed by mixing and spirally winding two tinned copper wires with different wire diameters and a wire diameter ratio of 0.9-1, wherein the wire diameter of each tinned copper wire is 0.01-0.04 mm, and the weaving density is 92-95%.

7. The flexible, low-attenuation, multi-core cable of claim 1, further comprising: the thickness of the PE inner insulating layer (18) is not more than 0.5mm, and the thickness of the PVC outer insulating layer (16) is 0.5mm to 1.2 mm.

8. The flexible, low-attenuation, multi-core cable of claim 1, further comprising: the thickness of the chloroprene rubber outer sheath (4) is 1.5mm to 2.8 mm.

9. The flexible, low-attenuation, multi-core cable of claim 1, further comprising: the thickness of the polyurethane outer insulating layer (7) is 0.6mm to 1 mm.

10. The flexible, low-attenuation, multi-core cable of claim 1, further comprising: the lay length of the cable core is 10-20 times of the outer diameter of the power wire core (1).

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