Heat-aging-resistant high-voltage power cable

Abstract

The utility model discloses a heat aging resistant high voltage power cable comprising a cable sleeve, the cable sleeve is internally provided with an insulation shielding net, the insulation shielding net is internally provided with seven core bodies, one of the core bodies is located at the central position in the insulation shielding net, and the other core body is located at the central position in the insulation shielding net. The other six core bodies are annularly and uniformly arranged in the insulation shielding net, the outer surface of each of the seven core bodies is sequentially provided with a heat-resistant layer, an anti-corrosion layer and a core body sleeve, and gaps in the insulation shielding net are filled with a filling layer. According to the heat-aging-resistant high-voltage power cable, the heat-resistant layer made of the silane crosslinked polyethylene and the thermoplastic polyethylene is adopted, so that the high-temperature resistance of the cable is improved, the structure and the performance of the cable can still be kept in a high-temperature environment for a long time, and the stability and the reliability of power transmission are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a heat-resistant and aging-resistant high-voltage power cable. Background Art

[0002] With the development of economy and the growth of electricity demand, high-voltage power cables are playing an increasingly important role in power transmission networks.

[0003] Referring to the Chinese patent, ultra-high voltage power cable (publication number: CN219958630U, publication date: 2023-11-03), this patent solves the problem that the existing ultra-high voltage multi-core optoelectronic composite power cable has poor weather resistance and is prone to cracking and damage during long-term use, thereby easily reducing the service life of the ultra-high voltage multi-core optoelectronic composite power cable. However, due to long-term exposure to high temperature and high pressure, the insulation material of the cable is prone to thermal aging, resulting in a decrease in insulation performance, and may even cause safety accidents in severe cases. In this regard, we propose a heat-resistant high-voltage power cable to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a heat-resistant and aging-resistant high-voltage power cable, which solves the problems raised in the background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a heat-resistant and aging-resistant high-voltage power cable, comprising a cable sheath, an insulating shielding net is arranged inside the cable sheath, seven cores are arranged inside the insulating shielding net, one of the cores is located at the center position inside the insulating shielding net, and the remaining six cores are evenly arranged in a ring shape inside the insulating shielding net, the outer surfaces of the seven cores are sequentially provided with a heat-resistant layer, an anti-corrosion layer, and a core sheath, and the gaps inside the insulating shielding net are filled with a filling layer.

[0006] Preferably, the heat-resistant layer is made of silane cross-linked polyethylene and thermoplastic polyethylene materials.

[0007] Preferably, the anti-corrosion layer is made of polyvinyl chloride and rubber materials, and the filling layer is filled with glass fiber materials.

[0008] Preferably, the insulating shielding net is filled with moisture-proof particles and antioxidant particles, and the moisture-proof particles wrap the antioxidant particles inside.

[0009] Preferably, the outer surfaces of the six core sleeves are all in contact with the inner surface of the insulating shielding net, and the outer surfaces of the six core sleeves are all in contact with the outer surface of the core sleeve at the center position.

[0010] Preferably, the seven cores are all made of copper wire material.

[0011] Beneficial Effects

[0012] The utility model provides a heat-resistant and aging-resistant high-voltage power cable. Compared with the prior art, it has the following beneficial effects:

[0013] (1) The heat-resistant and aging-resistant high-voltage power cable is beneficial to improving the high-temperature resistance of the cable by adopting a heat-resistant layer of silane cross-linked polyethylene and thermoplastic polyethylene, which enables the cable to maintain its structure and performance in a high-temperature environment for a long time, and helps to improve the stability and reliability of power transmission.

[0014] (2) The heat-resistant and aging-resistant high-voltage power cable, by using polyvinyl chloride and rubber materials in the anti-corrosion layer, as well as moisture-proof particles and antioxidant particles inside the insulating shielding net, helps the cable resist corrosion and oxidation in harsh environments, which can extend the life of the cable, reduce the frequency of maintenance and replacement, and improve the reliability and economy of the power transmission system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the external structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 3 It is a partial structural schematic diagram of the utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the insulating shielding net of the utility model.

[0019] In the figure: 1. cable sheath; 2. insulating shielding net; 3. core body; 4. heat-resistant layer; 5. anti-corrosion layer; 6. core sheath; 7. filling layer; 21. moisture-proof particles; 22. antioxidant particles. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The utility model provides two technical solutions: specifically including the following embodiments:

[0022] Example 1

[0023] See also Figure 1 - Figure 3 A heat-resistant and aging-resistant high-voltage power cable comprises a cable sheath 1. The outer layer of the cable sheath 1 is extruded into a sleeve-like structure through a cable sheath extruder to ensure that the space inside the cable sheath 1 is retained to accommodate the subsequent insulating shielding net 2 and core body 3. An insulating shielding net 2 is arranged inside the cable sheath 1. Seven core bodies 3 are arranged inside the insulating shielding net 2, one of which is located at the center of the insulating shielding net 2, and the remaining six core bodies 3 are evenly arranged in a ring shape inside the insulating shielding net 2. The outer surfaces of the seven core bodies 3 are sequentially provided with a heat-resistant layer 4, an anti-corrosion layer 5, and a core sheath 6, and the gaps inside the insulating shielding net 2 are filled with a filling layer 7.

[0024] The heat-resistant layer 4 is made of silane cross-linked polyethylene and thermoplastic polyethylene materials. The use of silane cross-linked polyethylene and thermoplastic polyethylene materials as the components of the heat-resistant layer not only improves the high temperature resistance of the cable, but also has excellent mechanical properties and chemical stability, ensuring that the cable can still operate reliably under extreme conditions, extending the service life of the cable and reducing maintenance costs. A wire coating machine is used to evenly coat silane cross-linked polyethylene, thermoplastic polyethylene and other materials on the surface of the seven cores to form a heat-resistant layer. The addition of this layer helps to improve the high temperature resistance of the cable.

[0025] The outer surfaces of the six core sleeves 6 are all in contact with the inner surface of the insulating shielding net 2 , and the outer surfaces of the six core sleeves 6 are all in contact with the outer surface of the core sleeve 6 at the center position.

[0026] The anti-corrosion layer 5 is made of polyvinyl chloride and rubber materials. The anti-corrosion layer 5 uses polyvinyl chloride and rubber materials to effectively prevent the external environment from corroding the cable and extend the life of the cable. The filling layer 7 is filled with glass fiber material, which helps to maintain the stability of the cable structure, improve the mechanical strength, and reduce the impact of the external environment on the cable.

[0027] Example 2

[0028] Based on Example 1, see Figure 4 As shown, the interior of the insulating shielding net 2 is filled with moisture-proof particles 21 and antioxidant particles 22. The moisture-proof particles 21 wrap the antioxidant particles 22 inside. The combination of moisture-proof particles and antioxidant particles helps to improve the moisture resistance and antioxidant properties of the cable, effectively ensure the stability of the internal structure of the cable, and ensure that it can still maintain excellent electrical performance in a humid environment.

[0029] The seven core bodies 3 are all made of copper wire material. The seven core bodies 3 are prepared by a copper wire drawing machine, and each core body is made of copper wire material with high conductivity.

[0030] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] During operation, first, the outer cable sheath 1 material is extruded into a sleeve-like structure through a cable sheath extruder. In this process, it is ensured that the space inside the cable sheath 1 is retained; then, an insulating shielding net extruder is used to form an insulating layer inside the cable sheath 1, and a main core 3 is extruded at its central position, and the remaining six secondary cores 3 are evenly arranged around the insulating shielding net 2; then, a coating wire machine is used to evenly coat materials such as silane cross-linked polyethylene and thermoplastic polyethylene on the surface of the seven cores 3 to form a heat-resistant layer 4; the cable is further extruded through another extruder to add polyvinyl chloride and rubber materials to form an anti-corrosion layer 5; a glass fiber filling machine is used to inject glass fiber material into the gaps in the insulating shielding net 2 to form a filling layer 7 to maintain the stability of the cable structure; moisture-proof particles 21 and antioxidant particles 22 are injected into the insulating shielding net 2 to ensure the moisture resistance and antioxidant properties inside the cable; a copper wire drawing machine is used to manufacture the core 3 to ensure that the seven cores 3 are all made of copper wire material.

[0032] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A heat-resistant and aging-resistant high-voltage power cable, comprising a cable sheath (1), characterized in that: An insulating shielding net (2) is arranged inside the cable sheath (1), and seven cores (3) are arranged inside the insulating shielding net (2), one of the cores (3) is located at the center of the insulating shielding net (2), and the remaining six cores (3) are evenly arranged in a ring shape inside the insulating shielding net (2), and the outer surfaces of the seven cores (3) are sequentially provided with a heat-resistant layer (4), an anti-corrosion layer (5), and a core sleeve (6), and the gaps inside the insulating shielding net (2) are filled with a filling layer (7).

2. A heat-aging-resistant high-voltage power cable according to claim 1, characterized in that: The filling layer (7) is filled with glass fiber material.

3. A heat-aging-resistant high-voltage power cable according to claim 1, characterized in that: The insulating shielding net (2) is filled with moisture-proof particles (21) and antioxidant particles (22), and the moisture-proof particles (21) wrap the antioxidant particles (22) inside.

4. A heat-aging-resistant high-voltage power cable according to claim 1, characterized in that: The outer surfaces of the six core sleeves (6) are all in contact with the inner surface of the insulating shielding net (2), and the outer surfaces of the six core sleeves (6) are all in contact with the outer surface of the core sleeve (6) at the center position.

5. The heat-aging-resistant high-voltage power cable according to claim 1, characterized in that: The seven core bodies (3) are all made of copper wire material.

Images