Voltage-resistant antioxidant power cable

Abstract

The utility model discloses a pressure-resistant antioxidant power cable, which relates to the field of power cables and comprises a cable core, two groups of annularly distributed wire cores are arranged in the cable core, at least ten outer ring wire cores are arranged, at least six inner ring wire cores are arranged, each wire core is composed of a conductor, an insulating layer and a shielding layer, and the insulating layer is arranged between the conductor and the shielding layer. The cable core is externally coated with a composite pressure-resistant layer, the composite pressure-resistant layer is composed of a polymer matrix layer, a ceramic composite layer and a high-dielectric-constant ceramic film, the composite pressure-resistant layer is externally coated with an anti-oxidation sheath, and the anti-oxidation sheath is composed of an anti-oxidation substrate layer, an enhancement layer and a weather-resistant layer. The problem that a power cable is poor in pressure resistance and corrosion resistance is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, and particularly relates to a power cable with voltage resistance and oxidation resistance. Background Technique

[0002] A power cable is a cable product used to transmit and distribute high-power electric energy in the main line of a power system, including power cables of various voltage levels from 1 - 500 kV and above, and various insulations. Power cables are widely used in scenarios such as urban underground power grids, outgoing lines from power plants, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. A power cable is an important medium for transmitting electric energy from a power plant and a substation to user terminals, used to deliver power from a substation to various electrical equipment and systems to meet the power consumption needs of users. At the same time, it can connect various parts of the power system, including generators, transformers, switchgear, and user equipment, etc.

[0003] For example, the Chinese authorized patent "A Power Cable" with the publication number CN211879068U includes a cable core. An outer structural protection layer is provided outside the cable core. An insulating filling layer is filled inside the structural protection layer. A metal shielding layer is provided outside the structural protection layer. A fireproof and heat-insulating layer is provided outside the metal shielding layer. A moisture-proof layer is provided outside the fireproof and heat-insulating layer. A filling layer is provided inside the moisture-proof layer. A strengthening layer is provided outside the moisture-proof layer. A plurality of strengthening ribs are provided inside the strengthening layer. A first protection layer is provided outside the strengthening layer. A protection coating is provided on the outer wall of the first protection layer.

[0004] Although the above-mentioned prior art plays a certain protective role in the daily use of the cable, the strengthening structure is relatively single, and the overall voltage resistance performance is insufficient. When the voltage fluctuates or is too large, breakdown phenomena are likely to occur, leading to faults such as electric leakage and short circuits, thus increasing the risks of electric shock and fire. Moreover, during long-term use, the surface is prone to overlooking, resulting in a decline in insulation performance, causing the cable to lose protection and easily leading to faults such as electric leakage and short circuits. Therefore, it does not meet the existing requirements. For this reason, we propose a power cable with voltage resistance and oxidation resistance. Content of the Utility Model

[0005] The purpose of the utility model is to provide a power cable with voltage resistance and oxidation resistance to solve the problems of poor voltage resistance performance and corrosion resistance performance of the power cable proposed in the above background technique.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A power cable with pressure resistance and oxidation resistance, comprising a cable core. Inside the cable core, there are two groups of annularly distributed wire cores. There are at least ten outer wire cores and at least six inner wire cores. Each wire core is composed of a conductor, an insulating layer, and a shielding layer. The outside of the cable core is coated with a composite pressure-resistant layer. The composite pressure-resistant layer is composed of a polymer matrix layer, a ceramic composite layer, and a high dielectric constant ceramic film. The outside of the composite pressure-resistant layer is coated with an antioxidant sheath. The antioxidant sheath is composed of an antioxidant base layer, a reinforcing layer, and a weather-resistant layer.

[0007] Preferably, each wire core includes a conductor, which is stranded by multiple oxygen-free copper single wires. The insulating layer is coated on the outer wall of the conductor through an extrusion device. The shielding layer is wound around the outside of the insulating layer.

[0008] Preferably, a filler is provided in the gap between the cable core and the wire cores. The filler is made of polyester fiber.

[0009] Preferably, the polymer matrix layer is coated on the outer wall of the cable core through an extrusion device. The ceramic composite layer is fixed on the outside of the polymer matrix layer through a polymer adhesive. The high dielectric constant ceramic film is wound around the outside of the ceramic composite layer and fixed through a polymer adhesive.

[0010] Preferably, the antioxidant base layer is coated on the outside of the composite pressure-resistant layer through an extrusion device. The reinforcing layer is fixed on the outside of the antioxidant base layer through a polymer adhesive. The weather-resistant layer is coated on the outside of the reinforcing layer through an extrusion device.

[0011] Preferably, the shielding layer is a cage-like structure woven from tinned copper wires.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] 1. By providing a composite pressure-resistant layer, which is composed of a polymer matrix layer, a ceramic composite layer, and a high dielectric constant ceramic film, the combination of the high-insulation polymer matrix in the inner layer and the high dielectric constant ceramic film in the outer layer provides excellent electrical insulation performance, reduces the risk of leakage and breakdown. The addition of the nano-reinforcing layer improves the mechanical properties and thermal stability of the composite pressure-resistant layer, enabling it to maintain stable performance in complex environments, extending the service life of the cable, enhancing the pressure resistance and electrical insulation performance of the cable, while maintaining good flexibility and processability.

[0014] 2. The utility model is provided with an antioxidant sheath, which is composed of an antioxidant base layer, a reinforcing layer and a weather-resistant layer. The design of the multi-layer composite structure combines the antioxidant advantages of each layer of materials, which can significantly improve the antioxidant performance of the cable and extend the service life of the cable. The addition of the middle reinforcing layer improves the mechanical strength and wear resistance of the sheath, enabling the cable to better resist mechanical damage and wear during laying and operation. The addition of the outer weather-resistant layer further enhances the weather resistance and ultraviolet resistance of the cable, enabling it to be used outdoors or in harsh environments for a long time without damage.

[0015] 3. The utility model uses oxygen-free copper as the conductor, ensuring excellent electrical conductivity and low resistivity, resulting in extremely low losses during the transmission of electrical energy or signals, improving energy utilization efficiency and signal transmission quality. Ethylene propylene rubber is used as the insulating layer, which provides a strong barrier for the conductor with its excellent weather resistance, heat resistance, water resistance and chemical corrosion resistance, effectively preventing current leakage and short-circuit risks and ensuring electrical safety. In addition, the high insulation strength of ethylene propylene rubber also ensures the stable performance of the cable in high-voltage or high-frequency applications. The tinned copper wire braided mesh is used as the shielding layer, which not only has excellent electrical conductivity and can quickly guide interference signals to the ground wire, reducing the interference of electromagnetic radiation on internal signals, but also effectively blocks the intrusion of external electromagnetic fields through its fine braided structure, improving the clarity and accuracy of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the utility model;

[0017] Figure 2 is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 is a schematic diagram of the core structure of the utility model;

[0019] Figure 4 is a schematic diagram of the composite voltage-resistant layer structure of the utility model;

[0020] Figure 5 is a schematic diagram of the antioxidant sheath structure of the utility model.

[0021] In the figure: 1, cable core; 2, core; 21, conductor; 22, insulating layer; 23, shielding layer; 3, filler; 4, composite voltage-resistant layer; 41, polymer matrix layer; 42, ceramic composite layer; 43, high-dielectric constant ceramic film; 5, antioxidant sheath; 51, antioxidant base layer; 52, reinforcing layer; 53, weather-resistant layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] Please refer to Figures 1-5 , an embodiment provided by the present utility model: a high-voltage-resistant and antioxidant power cable, including a cable core 1. Inside the cable core 1, there are two groups of annularly distributed wire cores 2. There are at least ten outer wire cores 2 and at least six inner wire cores 2. The wire core 2 is composed of a conductor 21, an insulating layer 22, and a shielding layer 23. The outside of the cable core 1 is coated with a composite high-voltage-resistant layer 4. The composite high-voltage-resistant layer 4 is composed of a polymer matrix layer 41, a ceramic composite layer 42, and a high-dielectric-constant ceramic film 43. The outside of the composite high-voltage-resistant layer 4 is coated with an antioxidant sheath 5. The antioxidant sheath 5 is composed of an antioxidant base layer 51, a reinforcing layer 52, and a weather-resistant layer 53.

[0024] The composite high-voltage-resistant layer 4, combining the advantages of each layer of materials, can significantly improve the high-voltage resistance ability of the cable and meet the power transmission requirements of higher voltage levels. The composite antioxidant sheath 5 enhances the antioxidant performance, mechanical strength, wear resistance, weather resistance, and ultraviolet resistance of the cable to meet the requirements of high reliability and long life of the cable in modern power transmission systems.

[0025] Please refer to Figure 3 , the wire core 2 includes a conductor 21. The conductor 21 is stranded by multiple oxygen-free copper single wires. The insulating layer 22 is coated on the outer wall of the conductor 21 through an extrusion device. The shielding layer 23 is wound around the outside of the insulating layer 22. The shielding layer 23 is a cage-like structure woven by tinned copper wires. Made of oxygen-free copper material, it has excellent electrical conductivity, good ductility, and antioxidant properties, which can ensure the efficiency and stability of current transmission; the insulating layer 22 is made of ethylene propylene rubber material, which has excellent ozone resistance, moisture resistance, cold resistance, and aging resistance; the shielding layer 23 is a tinned copper wire braided net, which effectively shields external electromagnetic interference, protects the integrity and accuracy of signal transmission, and improves the anti-interference ability of the cable.

[0026] Please refer to Figure 2 , a filler 3 is provided at the gap between the cable core 1 and the wire core 2. The filler is made of polyester fiber material, which can not only maintain the longitudinal consistency of the cable, but also isolate external moisture and oxygen to a certain extent, protect the insulating layer, prevent the imbalance of the cable core, and at the same time improve the antioxidant ability of the cable to ensure the stable operation of the cable in a complex environment.

[0027] Please refer to Figure 4, the polymer matrix layer 41 is coated on the outer wall of the cable core 1 through an extrusion equipment. The ceramic composite layer 42 is fixed to the outside of the polymer matrix layer 41 through a polymer adhesive. The high dielectric constant ceramic film 43 is wound around the outside of the ceramic composite layer 42 and fixed through a polymer adhesive. The polymer matrix layer 41 is made of cross-linked polyethylene, serving as the basis of the composite voltage-resistant layer, providing excellent electrical insulation performance and initial voltage-resistant strength. The ceramic composite layer 42 is made of a composite material of nano-aluminum oxide and a polymer matrix. Through the strengthening effect of nano-particles, the mechanical properties and voltage-resistant strength of the intermediate layer are improved, while maintaining a certain flexibility to adapt to the bending and stretching of the cable. The high dielectric constant ceramic film 43 is made of a film of barium titanate material. By using the characteristics of high dielectric constant materials, the electric field strength is reduced, and the overall voltage-resistant ability of the composite voltage-resistant layer is improved. At the same time, the film form can maintain good flexibility and processability.

[0028] Please refer to Figure 5 , the antioxidant base layer 51 is coated on the outside of the composite voltage-resistant layer 4 through an extrusion equipment. The reinforcing layer 52 is fixed to the outside of the antioxidant base layer 51 through a polymer adhesive. The weather-resistant layer 53 is coated on the outside of the reinforcing layer 52 through an extrusion equipment. The antioxidant base layer 51 is made of polyimide material, serving as the base layer of the sheath, providing excellent antioxidant performance and initial mechanical strength. The reinforcing layer 52 is made of a composite of nano-silica and the polymer matrix PEEK. Through the strengthening effect of nano-particles, the mechanical properties and wear resistance of the intermediate layer are improved, while maintaining good antioxidant performance. The weather-resistant layer 53 is made of a polymer material with excellent weather resistance and ultraviolet resistance, such as modified polyurethane, serving as the outermost layer of the sheath to resist harmful factors such as oxygen and ultraviolet rays in the external environment, and further extending the service life of the cable.

[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A pressure-resistant and oxidation-resistant power cable, comprising a cable core (1), characterized in that: The cable core (1) is provided with two circles of annularly distributed wire cores (2) in the interior, wherein at least ten wire cores (2) are provided in the outer circle and at least six wire cores (2) are provided in the inner circle, wherein the wire core (2) is composed of a conductor (21), an insulating layer (22) and a shielding layer (23), and the exterior of the cable core (1) is coated with a composite pressure-resistant layer (4), wherein the composite pressure-resistant layer (4) is composed of a polymer matrix layer (41), a ceramic composite layer (42) and a high dielectric constant ceramic film (43), and the exterior of the composite pressure-resistant layer (4) is coated with an anti-oxidation sheath (5), wherein the anti-oxidation sheath (5) is composed of an anti-oxidation base layer (51), a reinforcement layer (52) and a weather-resistant layer (53).

2. A voltage-resistant and oxidation-resistant power cable according to claim 1, characterized in that: The wire core (2) comprises a conductor (21), wherein the conductor (21) is formed by twisting a plurality of oxygen-free copper monofilaments, the insulating layer (22) is coated on the outer wall of the conductor (21) by an extrusion device, and the shielding layer (23) is wound around the outside of the insulating layer (22).

3. A pressure-resistant and oxidation-resistant power cable according to claim 1, characterized in that: A filler (3) is provided at the gap between the cable core (1) and the wire core (2), and the filler is made of polyester fiber.

4. A voltage-resistant and oxidation-resistant power cable according to claim 1, characterized in that: The polymer matrix layer (41) is coated on the outer wall of the cable core (1) by means of an extrusion device, the ceramic composite layer (42) is fixed to the outside of the polymer matrix layer (41) by means of a polymer adhesive, and the high dielectric constant ceramic film (43) is wound around the outside of the ceramic composite layer (42) and fixed by means of a polymer adhesive.

5. The voltage-resistant and oxidation-resistant power cable according to claim 1, characterized in that: The anti-oxidation base layer (51) is coated on the outside of the composite pressure-resistant layer (4) by means of an extrusion device, the reinforcement layer (52) is fixed on the outside of the anti-oxidation base layer (51) by means of a polymer adhesive, and the weather-resistant layer (53) is coated on the outside of the reinforcement layer (52) by means of an extrusion device.

6. A voltage-resistant and oxidation-resistant power cable according to claim 2, characterized in that: The shielding layer (23) is a cage-like structure woven from tinned copper wires.

Images