Multi-core communication power cable

Abstract

This utility model discloses a multi-core communication power cable, relating to the field of power cable technology. It includes a cable core composed of multiple wire cores and a flexible filling film layer, with the multiple wire cores arranged in a ring array. The flexible filling film layer is disposed in the gaps between the wire cores. A wrapping shielding layer is wound around the outside of the cable core. A composite insulating film layer is wrapped around the outside of the wrapping shielding layer. A wear-resistant reinforcing film layer is wrapped around the outside of the composite insulating film layer. An outer sheathing layer is wrapped around the outside of the wear-resistant reinforcing film layer. The outer sheathing layer and the wear-resistant reinforcing film layer are formed by extrusion. This multi-core communication power cable, through the double-layer structure of the aluminum-plastic composite film layer and the copper mesh braided film layer of the wrapping shielding layer, combined with the anti-interference isolation film layer of the wire cores, significantly improves the anti-electromagnetic interference capability and ensures the stability of signal and power transmission.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, specifically a multi-core communication power cable. Background Technology

[0002] Power cables are a type of wire and cable, primarily used to draw and transmit electrical energy from a power source. They fall under the category of power engineering cables and play a crucial role in transmitting and distributing high-power electrical energy within the power system. Multi-core communication power cables are integrated cables that simultaneously achieve power transmission and signal communication. They are widely used in communication base stations, data centers, and other scenarios, and must simultaneously meet the requirements of stable power transmission, interference-resistant signal transmission, and durability in complex environments.

[0003] Chinese Patent Publication No. CN205508445U, authorized on August 24, 2016, discloses a multi-core fire-resistant flexible cable for communication power supply. The cable includes several cable cores and an outer insulating sheath. Each cable core has an inner insulating sheath on its outer surface, a cable wrapping tape on its outer side, and an inner flame-retardant sheath on its outer side. The inner side of the cable wrapping tape, located inside the inner flame-retardant sheath, is filled with flame-retardant material. From the inside out, the cable wrapping tape is sequentially composed of low-smoke halogen-free glass fiber cloth tape and a fire-resistant fiber sheath, which are bonded together. This invention, through the action of the inner flame-retardant sheath, low-smoke halogen-free glass fiber cloth tape, and fire-resistant fiber sheath, effectively increases the fire resistance of the cable, making it non-flammable and self-extinguishing in the event of an electrical fire, meeting Class A flame-retardant requirements, extending the cable's service safety, and ensuring the normal operation of equipment.

[0004] Existing multi-core communication power cables have a simple shielding structure, making them susceptible to signal distortion due to external electromagnetic interference. They also have insufficient anti-aging properties, and the membrane layer is prone to cracking due to environmental erosion, affecting the cable's service life and making it difficult to meet the requirements for high-reliability communication power transmission. Utility Model Content

[0005] The purpose of this utility model is to provide a multi-core communication power cable to solve the problems mentioned in the background art, such as the single shielding structure of existing multi-core communication power cables, which are susceptible to signal distortion due to external electromagnetic interference, insufficient anti-aging performance of the cables, and easy cracking of the film layer due to environmental erosion, which affects the service life of the cables and makes it difficult to meet the requirements of high-reliability communication power transmission.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-core communication power cable, comprising a cable core, wherein the cable core is composed of multiple wire cores and a flexible filling film layer, and the multiple wire cores are arranged in a ring array. The flexible filling film layer is disposed in the gap between the wire cores. A wrapping shielding layer is wound around the outside of the cable core. A composite insulating film layer is wrapped around the outside of the wrapping shielding layer. A wear-resistant reinforcing film layer is wrapped around the outside of the composite insulating film layer. An outer protective film layer is wrapped around the outside of the wear-resistant reinforcing film layer. The outer protective film layer and the wear-resistant reinforcing film layer are formed by extrusion.

[0007] Preferably, the wire core includes a conductor, an insulating base film layer, and an anti-interference isolation film layer, wherein the conductor is made of multiple copper wires twisted together, the insulating base film layer is extruded on the outside of the conductor, and the anti-interference isolation film layer is spirally wound at a 45-degree angle on the outside of the insulating base film layer.

[0008] Preferably, the wrapping shielding layer includes an aluminum-plastic composite film layer and a copper mesh braided film layer. The aluminum-plastic composite film layer is wrapped around the outside of the cable core in an overlapping manner, and the copper mesh braided film layer is wrapped around the outside of the aluminum-plastic composite film layer in a reverse overlapping manner. The aluminum-plastic composite film layer and the copper mesh braided film layer are bonded together with conductive adhesive.

[0009] Preferably, the composite insulating film layer includes an ethylene-tetrafluoroethylene copolymer film layer and a polyolefin insulating film layer. The ethylene-tetrafluoroethylene copolymer film layer is bonded and wrapped around the outside of the shielding layer, and the polyolefin insulating film layer is bonded and wrapped around the outside of the ethylene-tetrafluoroethylene copolymer film layer in the opposite direction. The ethylene-tetrafluoroethylene copolymer film layer and the polyolefin insulating film layer are bonded together by hot melt adhesive.

[0010] Preferably, the wear-resistant reinforcing film layer includes an ultra-high molecular weight polyethylene wear-resistant film layer and an nitrile rubber buffer film layer, wherein the nitrile rubber buffer film layer is disposed on the inner side of the ultra-high molecular weight polyethylene wear-resistant film layer, and the nitrile rubber buffer film layer and the ultra-high molecular weight polyethylene wear-resistant film layer are bonded together by a weather-resistant hot melt adhesive, and micro-protrusions are uniformly distributed on the outer surface of the ultra-high molecular weight polyethylene wear-resistant film layer.

[0011] Preferably, the outer protective film layer has a glass fiber mesh embedded inside, and the glass fiber mesh has a warp and weft woven structure.

[0012] Preferably, the outer surface of the outer protective film layer is coated with an anti-aging coating.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This utility model device significantly improves electromagnetic interference resistance and ensures the stability of signal and power transmission by using a double-layer structure of an aluminum-plastic composite film layer and a copper mesh braided film layer wrapped with a shielding layer, combined with an anti-interference isolation film layer for the wire core. This utility model device uses a double-layer membrane structure design that combines a composite insulating membrane layer with an ethylene-tetrafluoroethylene copolymer membrane layer and a polyolefin insulating membrane layer through thermal fusion bonding, along with a wear-resistant reinforcing membrane layer, to improve the bonding strength between the membrane layers and avoid delamination. This utility model device enhances the overall structural stability and resistance to environmental erosion by embedding fiberglass mesh in the outer protective layer and combining it with an anti-aging coating on the outer surface, thereby extending the service life of the cable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the cable core of this utility model; Figure 3 This is a structural diagram of the wrapping shielding layer of this utility model; Figure 4 This is a cross-sectional view of the composite insulating film layer of this utility model; Figure 5 This is a cross-sectional view of the wear-resistant reinforcing film layer of this utility model; Figure 6 This is a cross-sectional view of the outer protective film layer of this utility model.

[0015] In the diagram: 1. Cable core; 2. Wire core; 3. Flexible filler film layer; 4. Wrapping shielding layer; 5. Composite insulation film layer; 6. Wear-resistant reinforcing film layer; 7. Outer sheath film layer; 8. Conductor; 9. Insulating base film layer; 10. Anti-interference isolation film layer; 11. Aluminum-plastic composite film layer; 12. Copper mesh braided film layer; 13. Ethylene-tetrafluoroethylene copolymer film layer; 14. Polyolefin insulation film layer; 15. Ultra-high molecular weight polyethylene wear-resistant film layer; 16. Nitrile rubber buffer film layer; 17. Fiberglass mesh cloth; 18. Anti-aging coating. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Please see Figure 1-6This utility model provides an embodiment of a multi-core communication power cable, comprising a cable core 1, which is composed of multiple wire cores 2 and a flexible filling film layer 3, wherein the multiple wire cores 2 are arranged in a ring array, the flexible filling film layer 3 is disposed in the gaps between the wire cores 2, a wrapping shielding layer 4 is wound around the outside of the cable core 1, a composite insulating film layer 5 is wrapped around the outside of the wrapping shielding layer 4, a wear-resistant reinforcing film layer 6 is wrapped around the outside of the composite insulating film layer 5, and an outer sheathing film layer 7 is wrapped around the outside of the wear-resistant reinforcing film layer 6, and the outer sheathing film layer 7 and the wear-resistant reinforcing film layer 6 are formed by extrusion. The wire core 2 includes a conductor 8, an insulating base film layer 9, and an anti-interference isolation film layer 10, and the conductor... The conductor 8 is made of multiple stranded copper wires. The insulating base film layer 9 is extruded around the outside of the conductor 8. The anti-interference isolation film layer 10 is spirally wound around the outside of the insulating base film layer 9 at a 45-degree angle. The anti-interference isolation film layer is a polyimide film layer. Polyimide has good insulation properties and can effectively isolate the conductor from the external structure to avoid short circuits or signal interference. At the same time, the winding structure stabilizes the core shape and ensures the integrity of the internal structure of the cable. The inner surface of the polyimide film layer is coated with a graphene conductive layer, which retains its isolation and insulation properties and can work with the external shielding layer to enhance the anti-electromagnetic interference effect, reduce the influence of external electromagnetic signals on the internal transmission signals of the cable, and improve the signal transmission stability.

[0018] Please see Figure 1 and Figure 3 The shielding layer 4 includes an aluminum-plastic composite film layer 11 and a copper mesh braided film layer 12. The aluminum-plastic composite film layer 11 is wrapped around the outside of the cable core 1 in an overlapping manner, and the copper mesh braided film layer 12 is wrapped around the outside of the aluminum-plastic composite film layer 11 in the opposite direction. The aluminum-plastic composite film layer 11 and the copper mesh braided film layer 12 are bonded together with conductive adhesive. The aluminum-plastic composite film layer has excellent shielding ability against low-frequency electromagnetic interference and can effectively block the penetration of low-frequency signals. The copper mesh braided film layer has a significant shielding effect against high-frequency electromagnetic interference and can attenuate the propagation of high-frequency electromagnetic waves. The combined use of the aluminum-plastic composite film layer and the copper mesh braided film layer can form a synergistic shielding system.

[0019] Please see Figure 1 and Figure 4The composite insulating film layer 5 includes an ethylene-tetrafluoroethylene copolymer film layer 13 and a polyolefin insulating film layer 14. The ethylene-tetrafluoroethylene copolymer film layer 13 is bonded and wrapped around the outside of the shielding layer 4, and the polyolefin insulating film layer 14 is bonded and wrapped around the outside of the ethylene-tetrafluoroethylene copolymer film layer 13 in the opposite direction. The ethylene-tetrafluoroethylene copolymer film layer 13 and the polyolefin insulating film layer 14 are bonded together with hot melt adhesive. The thickness ratio of the ethylene-tetrafluoroethylene copolymer film layer to the polyolefin insulating film layer is 1:2. The ethylene-tetrafluoroethylene copolymer film layer has excellent high temperature resistance, chemical corrosion resistance and high frequency insulation performance. It can maintain stable insulation resistance in complex environments such as high temperature and acid and alkali. The polyolefin insulating film layer has good room temperature insulation, low dielectric constant and low dielectric loss. It is suitable for the insulation requirements of power and signal transmission under normal working conditions. The combination of the two can cover a wider temperature range and environmental conditions, ensuring the insulation reliability in high temperature or harsh environments, and ensuring low loss transmission under normal working conditions, thus improving the adaptability of the overall insulation system.

[0020] Please see Figure 1 and Figure 5 The wear-resistant reinforcing film layer 6 includes an ultra-high molecular weight polyethylene (UHMWPE) wear-resistant film layer 15 and a nitrile rubber (NBR) buffer film layer 16. The NBR buffer film layer 16 is disposed inside the UHMWPE wear-resistant film layer 15. The NBR buffer film layer 16 and the UHMWPE wear-resistant film layer 15 are bonded together with a weather-resistant hot melt adhesive. The outer surface of the UHMWPE wear-resistant film layer 15 is uniformly distributed with micro-protrusions. The UHMWPE wear-resistant film layer has extremely high wear resistance, excellent scratch resistance, and low coefficient of friction. As an outer layer, it can directly resist mechanical damage such as external friction and collision, effectively reducing film wear caused by dragging and squeezing. The NBR buffer film layer has excellent elasticity and impact absorption capacity. As an inner layer, it can absorb external impact and vibration, preventing rigid friction from being directly transmitted to the internal structure. At the same time, it buffers the stress when the cable is bent through elastic deformation, preventing the wear-resistant film layer from cracking due to excessive stretching or squeezing.

[0021] Please see Figure 1 and Figure 6 The outer protective film layer 7 has a glass fiber mesh 17 embedded inside, and the glass fiber mesh 17 has a warp and weft woven structure. The outer surface of the outer protective film layer 7 is coated with an anti-aging coating 18. The outer protective film layer 7 is made of modified polyamide. The glass fiber mesh 17 and the modified polyamide are co-extruded. The anti-aging coating 18 is a polysiloxane coating.

[0022] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-core communication power cable, comprising a cable core (1), characterized in that: The cable core (1) is composed of multiple wire cores (2) and a flexible filling film layer (3), and the multiple wire cores (2) are arranged in a ring array. The flexible filling film layer (3) is disposed in the gap between the wire cores (2). The cable core (1) is wrapped with a wrapping shielding layer (4). The wrapping shielding layer (4) is wrapped with a composite insulating film layer (5). The composite insulating film layer (5) is wrapped with a wear-resistant reinforcing film layer (6). The wear-resistant reinforcing film layer (6) is wrapped with an outer protective film layer (7). The outer protective film layer (7) and the wear-resistant reinforcing film layer (6) are formed by extrusion.

2. The multi-core communication power cable according to claim 1, characterized in that: The core (2) includes a conductor (8), an insulating base film layer (9), and an anti-interference isolation film layer (10). The conductor (8) is made of multiple copper wires twisted together. The insulating base film layer (9) is extruded onto the outside of the conductor (8). The anti-interference isolation film layer (10) is spirally wound around the outside of the insulating base film layer (9) at a 45-degree angle.

3. A multi-core communication power cable according to claim 1, characterized in that: The wrapping shielding layer (4) includes an aluminum-plastic composite film layer (11) and a copper mesh braided film layer (12). The aluminum-plastic composite film layer (11) is wrapped around the outside of the cable core (1) in an overlapping manner. The copper mesh braided film layer (12) is wrapped around the outside of the aluminum-plastic composite film layer (11) in the opposite direction. The aluminum-plastic composite film layer (11) and the copper mesh braided film layer (12) are bonded together by conductive adhesive.

4. A multi-core communication power cable according to claim 1, characterized in that: The composite insulating film layer (5) includes an ethylene-tetrafluoroethylene copolymer film layer (13) and a polyolefin insulating film layer (14). The ethylene-tetrafluoroethylene copolymer film layer (13) is bonded and wrapped around the outside of the wrapping shield layer (4). The polyolefin insulating film layer (14) is bonded and wrapped around the outside of the ethylene-tetrafluoroethylene copolymer film layer (13) in the opposite direction. The ethylene-tetrafluoroethylene copolymer film layer (13) and the polyolefin insulating film layer (14) are bonded together by hot melt adhesive.

5. A multi-core communication power cable according to claim 1, characterized in that: The wear-resistant reinforcing film layer (6) includes an ultra-high molecular weight polyethylene wear-resistant film layer (15) and a nitrile rubber buffer film layer (16), and the nitrile rubber buffer film layer (16) is disposed on the inner side of the ultra-high molecular weight polyethylene wear-resistant film layer (15). The nitrile rubber buffer film layer (16) and the ultra-high molecular weight polyethylene wear-resistant film layer (15) are bonded together by a weather-resistant hot melt adhesive, and micro-protrusions are evenly distributed on the outer surface of the ultra-high molecular weight polyethylene wear-resistant film layer (15).

6. A multi-core communication power cable according to claim 1, characterized in that: The outer protective film layer (7) is embedded with a glass fiber mesh (17), and the glass fiber mesh (17) has a warp and weft woven structure.

7. A multi-core communication power cable according to claim 1, characterized in that: The outer surface of the outer protective film layer (7) is coated with an anti-aging coating (18).

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