Weather-proof high-conductivity composite structure power cable

Abstract

The utility model discloses a weather-proof high-conductivity composite structure power cable, which relates to the technical field of power cables and comprises a cable core, six groups of annularly distributed wire cores are arranged in the cable core, each wire core is composed of a conductor, a conductor shielding layer and an inner insulating layer, an isolating layer is arranged outside the cable core, and the isolating layer is arranged outside the cable core. The isolation layer is composed of an inner semi-conductive shielding layer, an electric isolation layer and an outer semi-conductive shielding layer, a heat resistance layer is arranged outside the isolation layer, the heat resistance layer is composed of an inorganic heat resistance layer, a heat-resistant layer and a reflecting layer, a weather-proof layer is arranged outside the heat resistance layer, and the weather-proof layer is composed of an inner lining layer, an enhancement layer and a weather-proof layer. The scheme solves the problem that the power cable is difficult to maintain efficient and stable power transmission for a long time in various severe rings.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, specifically to a weather-resistant, highly conductive composite power cable. Background Technology

[0002] Power cables are indispensable key components in power transmission and distribution systems. They use highly conductive copper or aluminum as conductors, with outer insulation and protective layers to ensure the safe and efficient delivery of current to its destination. These cables come in a variety of designs, from lightweight models suitable for low-voltage household electricity to heavy-duty cables capable of withstanding high voltage and long-distance transmission. They not only possess excellent electrical performance but also good weather resistance, flame retardancy, and anti-aging capabilities, ensuring a stable and reliable power supply. In modern cities and industrial facilities, power cables act like invisible energy arteries, supporting the normal operation and sustainable development of society.

[0003] For example, the Chinese authorized patent CN209496657U, entitled "A Power Cable," includes several cable units. Each cable unit is surrounded by a wrapping tape, and a filler tape is placed between the wrapping tape and the cable units. An inner sheath, an armor layer, and an outer sheath are sequentially arranged outside the wrapping tape. Each cable unit includes several cores, and a metal outer shell is placed outside the cores. XLPE insulation material is placed between the metal outer shell and the cores. An insulating shielding layer and a metal shielding layer are sequentially arranged outside the metal outer shell. Optimizing the structure of the power cable improves its mechanical properties and electrical stability.

[0004] The existing technologies mentioned above still have shortcomings in conductivity, weather resistance and thermal stability when facing harsh environments such as high temperature, low temperature, humidity and corrosion. They are difficult to maintain efficient and stable power transmission for a long time and therefore do not meet the current needs. In response, we propose a weather-resistant high conductivity composite power cable. Utility Model Content

[0005] The purpose of this invention is to provide a weather-resistant, highly conductive composite power cable to solve the problem mentioned in the background art of power cables being unable to maintain efficient and stable power transmission over a long period of time in various harsh environments.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a weather-resistant, high-conductivity composite power cable, comprising a cable core, wherein the cable core has six groups of annularly distributed wire cores inside, each wire core consisting of a conductor, a conductor shielding layer, and an inner insulation layer; an isolation layer is provided outside the cable core, the isolation layer consisting of an inner semi-conductive shielding layer, an electrical isolation layer, and an outer semi-conductive shielding layer; a heat-resistant layer is provided outside the isolation layer, the heat-resistant layer consisting of an inorganic heat-resistant layer, a heat-resistant layer, and a reflective layer; and a composite weather-resistant layer is provided outside the heat-resistant layer, the composite weather-resistant layer consisting of an inner lining layer, a reinforcing layer, and a weather-resistant layer.

[0007] Preferably, the conductor is made of multiple strands of nickel alloy wire twisted together, and the cross-section of the wire core has a fan-shaped structure.

[0008] Preferably, the conductor shielding layer is wrapped around the outside of the conductor using an extrusion device, and the inner insulation layer is wrapped around the outside of the conductor shielding layer using an extrusion device.

[0009] Preferably, the inner semiconductive shielding layer is adhered to the outside of the cable core, the electrical isolation layer has a multi-layer structure and is wrapped around the outside of the inner semiconductive shielding layer, and the outer semiconductive shielding layer is adhered to the outside of the electrical isolation layer.

[0010] Preferably, the inorganic heat-insulating layer is fixed to the outside of the insulating layer by an adhesive, the heat-resistant layer is fixed to the outside of the inorganic heat-insulating layer by an adhesive, and the reflective layer is spirally wound around the outside of the heat-resistant layer.

[0011] Preferably, the inner lining layer is wrapped around the outside of the heat-insulating layer by an extrusion device, the reinforcing layer is woven in a mesh pattern around the outside of the inner lining layer, and the weather-resistant layer is wrapped around the outside of the reinforcing layer by an extrusion device.

[0012] Preferably, a reinforcing core is provided at the center of the cable core.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses a nickel alloy as the central conductor to ensure low resistance and high conductivity, reduce energy loss, and the use of conductor shielding layer and inner insulation layer effectively improves electric field distribution, reduces partial discharge and electric field concentration, improves the voltage withstand capability of the cable, and ensures that the cable can still work normally in harsh environments such as high temperature, low temperature, humidity, and corrosion.

[0015] 2. This utility model forms a highly efficient thermal barrier through the combined action of an inorganic heat-insulating layer and a heat-resistant layer, significantly reducing the temperature rise of the cable in high-temperature environments. The use of inorganic mineral materials and inorganic flame-retardant fillers improves the fire resistance of the cable, maintaining a certain degree of structural and functional integrity even under fire conditions. The combination of polymer matrix and inorganic fillers in the heat-resistant layer enhances the mechanical strength of the cable, improving its wear and tear resistance. The reflective heat insulation layer reflects most of the heat radiation, further reducing the surface temperature of the cable and extending its service life in high-temperature environments. This allows the cable to adapt to various harsh environments such as high temperatures, fires, and corrosion, ensuring normal operation under all conditions.

[0016] 3. This utility model features a composite weather-resistant layer. The addition of the reinforcing layer significantly improves the tear resistance, compression resistance, and abrasion resistance of the cable's outer sheath. The weather-resistant layer effectively resists the erosion of environmental factors such as ultraviolet rays, ozone, and chemical corrosion, extending the cable's service life. It can adapt to extreme climates and harsh environments, such as high temperature, low temperature, humidity, and salt spray, ensuring that the cable can work normally under various conditions. At the same time, it has good flexibility and plasticity, facilitating cable installation and bending, as well as subsequent maintenance and replacement. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the isolation layer structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the heat-insulating layer structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the weather-resistant layer structure of this utility model.

[0022] In the diagram: 1. Cable core; 2. Wire core; 21. Conductor; 22. Conductor shielding layer; 23. Inner insulation layer; 3. Insulation layer; 31. Inner semiconductive shielding layer; 32. Electrical isolation layer; 33. Outer semiconductive shielding layer; 4. Heat-insulating layer; 41. Inorganic heat-insulating layer; 42. Heat-resistant layer; 43. Reflective layer; 5. Composite weather-resistant layer; 51. Inner lining layer; 52. Reinforcing layer; 53. Weather-resistant layer; 6. Reinforcing core. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-5 This utility model provides an embodiment of a weather-resistant, high-conductivity composite power cable, comprising a cable core 1, inside which are six groups of annularly distributed wire cores 2. Each wire core 2 consists of a conductor 21, a conductor shielding layer 22, and an inner insulation layer 23. The conductor 21 is made of multiple strands of nickel alloy wire twisted together, and the cross-section of the wire core 2 is a fan-shaped structure. A reinforcing core 6 is provided at the center of the cable core 1. The conductor shielding layer 22 is wrapped around the outside of the conductor 21 by an extrusion device, and the inner insulation layer 23 is wrapped around the outside of the conductor shielding layer 22 by an extrusion device. The conductor 21 is a nickel alloy, ensuring good conductivity and ductility, while improving stability in high-temperature environments. The conductor shielding layer 22 is a mixture of ethylene-propylene-diene terpolymer (EPDM) and carbon black, used to improve the electric field distribution and reduce partial discharge phenomena. The inner insulation layer 23 is ethylene propylene rubber, which has excellent heat resistance, mechanical strength, and electrical properties, while providing electrical isolation.

[0025] Please see Figure 1 , Figure 2 and Figure 3 An isolation layer 3 is provided on the outside of the cable core 1. The isolation layer 3 consists of an inner semiconductive shielding layer 31, an electrical isolation layer 32, and an outer semiconductive shielding layer 33. The inner semiconductive shielding layer 31 is adhered to the outside of the cable core 1. The electrical isolation layer 32 has a multi-layer structure and is wrapped around the outside of the inner semiconductive shielding layer 31. The outer semiconductive shielding layer 33 is adhered to the outside of the electrical isolation layer 32. The inner semiconductive shielding layer 31 is a semiconductive ethylene-vinyl acetate copolymer, which is closely attached to the outer surface of the cable core 1 to smooth the electric field distribution and reduce partial discharge. The electrical isolation layer 32 is a multi-layer polyester film that provides the main electrical isolation and mechanical protection. The outer semiconductive shielding layer 33 surrounds the electrical isolation layer to further improve the electric field distribution.

[0026] The inner and outer semiconductive shielding layers work together to smooth the electric field distribution, reduce partial discharge, and improve the cable's voltage withstand capability. The electrical isolation layer provides reliable electrical isolation, prevents current leakage and short circuits, ensures the safe operation of the cable, and enhances the cable's wear resistance, tear resistance, and compression resistance.

[0027] Please see Figure 1 , Figure 2 and Figure 4An insulating layer 4 is provided on the outside of the isolation layer 3. The insulating layer 4 is composed of an inorganic insulating layer 41, a heat-resistant layer 42, and a reflective layer 43. The inorganic insulating layer 41 is fixed to the outside of the isolation layer 3 by an adhesive. The heat-resistant layer 42 is fixed to the outside of the inorganic insulating layer 41 by an adhesive. The reflective layer 43 is spirally wound on the outside of the heat-resistant layer 42. The inorganic insulating layer 41 is made of diatomaceous earth, which has excellent high-temperature resistance and thermal stability. The heat-resistant layer 42 is a composite material of polyimide and aluminum hydroxide, which combines the flexibility of organic materials and the high-temperature resistance of inorganic materials. The reflective layer 43 is made of aluminum sheet with high reflectivity, which reduces the temperature of the cable surface by reflecting heat radiation.

[0028] Please see Figure 1 , Figure 2 and Figure 5 The heat-insulating layer 4 is surrounded by a composite weather-resistant layer 5, which consists of an inner liner 51, a reinforcing layer 52, and a weather-resistant layer 53. The inner liner 51 is wrapped around the outside of the heat-insulating layer 4 using an extrusion device. The reinforcing layer 52 is woven into a mesh around the outside of the inner liner 51. The weather-resistant layer 53 is wrapped around the outside of the reinforcing layer 52 using an extrusion device. The inner liner 51 is made of polyethylene and mainly serves as a transition, bonding, and initial protection. The reinforcing layer 52 is a woven metal wire mesh that provides additional mechanical strength and tear resistance. The weather-resistant layer 53 is made of thermoplastic polyurethane, which has excellent resistance to ultraviolet radiation, ozone, chemical corrosion, and weathering aging.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A weather-resistant, high-conductivity composite power cable, comprising a cable core (1), characterized in that: The cable core (1) has six sets of annularly distributed wire cores (2) inside. The wire core (2) is composed of a conductor (21), a conductor shielding layer (22) and an inner insulation layer (23). The cable core (1) is provided with an isolation layer (3) outside. The isolation layer (3) is composed of an inner semiconductive shielding layer (31), an electrical isolation layer (32) and an outer semiconductive shielding layer (33). The isolation layer (3) is provided with a heat-resistant layer (4) outside. The heat-resistant layer (4) is composed of an inorganic heat-resistant layer (41), a heat-resistant layer (42) and a reflective layer (43). The heat-resistant layer (4) is provided with a composite weather-resistant layer (5) outside. The composite weather-resistant layer (5) is composed of an inner lining layer (51), a reinforcing layer (52) and a weather-resistant layer (53).

2. The weather-resistant, high-conductivity composite power cable according to claim 1, characterized in that: The conductor (21) is made of multiple strands of nickel alloy wire twisted together, and the cross-section of the core (2) is a fan-shaped structure.

3. The weather-resistant, high-conductivity composite power cable according to claim 2, characterized in that: The conductor shielding layer (22) is wrapped around the outside of the conductor (21) by an extrusion device, and the inner insulation layer (23) is wrapped around the outside of the conductor shielding layer (22) by an extrusion device.

4. The weather-resistant, high-conductivity composite power cable according to claim 1, characterized in that: The inner semiconductive shielding layer (31) is adhered to the outside of the cable core (1), the electrical isolation layer (32) is a multi-layer structure and is wrapped around the outside of the inner semiconductive shielding layer (31), and the outer semiconductive shielding layer (33) is adhered to the outside of the electrical isolation layer (32).

5. The weather-resistant, high-conductivity composite power cable according to claim 1, characterized in that: The inorganic heat-insulating layer (41) is fixed to the outside of the isolation layer (3) by an adhesive, the heat-resistant layer (42) is fixed to the outside of the inorganic heat-insulating layer (41) by an adhesive, and the reflective layer (43) is spirally wound around the outside of the heat-resistant layer (42).

6. The weather-resistant, high-conductivity composite power cable according to claim 1, characterized in that: The inner lining layer (51) is wrapped around the outside of the heat-insulating layer (4) by an extrusion device, the reinforcing layer (52) is woven in a mesh shape around the outside of the inner lining layer (51), and the weather-resistant layer (53) is wrapped around the outside of the reinforcing layer (52) by an extrusion device.

7. The weather-resistant, high-conductivity composite power cable according to claim 1, characterized in that: A reinforcing core (6) is provided at the center of the cable core (1).

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