Novel termite-resistant medium voltage power cable

Abstract

The utility model discloses a novel ant termite medium voltage power cable, including the conductor, the conductor is equipped with conductor shield layer, insulating layer and insulating shield layer outward gradually, conductor shield layer, insulating layer and insulating shield layer adopt three layer co -extrusion and become, the insulating shield layer outside is equipped with metal shield layer, the metal shield layer outside is equipped with the wrapping layer, the wrapping layer outside is equipped with the inner lining, the inner lining outside is equipped with the ant proof layer, the inner lining and ant proof layer adopt double -deck co -extrusion and become, the ant proof layer outside is equipped with the outer sheath, the wrapping layer, inner lining, ant proof layer, outer sheath composition comprehensive protection body. Through by filling layer, wrapping layer, inner lining, ant proof layer, outer sheath composition comprehensive protection body, can effectively prevent the termite erosion to the cable.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a novel anti-ant medium-voltage power cable. Background Technology

[0002] Currently, termite prevention in cables generally employs chemical and physical methods. Chemical methods typically use chemical agents to kill or repel termites; however, these agents are volatile, leading to a decrease in termite-repellent performance and potentially causing serious environmental and health risks. Common physical methods include using rigid sheathing materials and wrapping with brass tape. However, rigid sheathed cables experience a decrease in sheath hardness due to high temperatures during long-term operation, affecting termite prevention. Brass tape is used extensively, resulting in high costs and hindering widespread adoption; furthermore, the poor corrosion resistance of brass materials makes them prone to oxidation and corrosion upon contact with air, compromising termite-repellent functionality.

[0003] Publication No. CN 112820449 A discloses a cross-linked polyethylene insulated halogen-free, low-smoke, flame-retardant, rodent- and termite-resistant medium-voltage power cable. The conductor is sequentially covered from the inside out with a conductor shielding layer, a cross-linked polyethylene insulation layer, an insulation shielding layer, and a metal shielding layer. An outer sheath is extruded onto the armor, and a coating layer is also provided on the outside of the outer sheath. A rodent-resistant microcapsule layer is set inside the coating layer. However, the volatile nature of the pesticide can reduce the termite-resistant performance, and the metal shielding effect needs improvement. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of termite-proof medium-voltage power cable, which is equipped with a conductor shielding layer and an insulation shielding layer. Through the comprehensive protection body composed of a filling layer, a wrapping layer, an inner lining layer, a termite-proof layer and an outer sheath, it can effectively prevent termites from eroding the cable.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A novel termite-proof medium-voltage power cable includes a conductor, a conductor shielding layer, an insulation layer, and an insulation shielding layer sequentially disposed outside the conductor. The conductor shielding layer, insulation layer, and insulation shielding layer are formed by three-layer co-extrusion. A metal shielding layer is disposed outside the insulation shielding layer. A wrapping layer is disposed outside the metal shielding layer. An inner lining layer is disposed outside the wrapping layer. An termite-proof layer is disposed outside the inner lining layer. The inner lining layer and the termite-proof layer are formed by two-layer co-extrusion. An outer sheath is disposed outside the termite-proof layer. The wrapping layer, inner lining layer, termite-proof layer, and outer sheath constitute a comprehensive protective body.

[0007] Preferably, the conductor is an annealed soft copper conductor with a segmented structure and a cross-sectional area of ​​10-1000 mm². 2 .

[0008] Preferably, the metal shielding layer includes multiple metal shielded cores, which are arranged outwardly, and a filling layer is provided between the multiple metal shielded cores. The filling layer, wrapping layer, inner lining layer, anti-termite layer, and outer sheath constitute a comprehensive protective body.

[0009] Preferably, the conductor shielding layer is a 10kV~35kV grade chemically cross-linked semiconducting inner shielding layer, and the insulating shielding layer is a 10kV~35kV grade chemically cross-linked outer shielding layer.

[0010] Preferably, the insulation layer is a 10kV~35kV grade chemically cross-linked polyethylene insulation layer.

[0011] Preferably, the filling layer is a fan-shaped filling strip.

[0012] Preferably, the wrapping layer is a non-woven fabric.

[0013] Preferably, the inner lining layer is a linear low-density polyethylene sheath material.

[0014] Preferably, the anti-ant layer is made of nylon sheath material.

[0015] Preferably, the outer sheath is made of polyvinyl chloride, polyethylene, or halogen-free low-smoke sheath material.

[0016] The beneficial effects of this utility model are:

[0017] 1. The cable has a reasonable structure, consisting of a filler layer, a wrapping layer, an inner lining layer, a termite-proof layer, and an outer sheath, which effectively prevents termite infestation. At the same time, the termite-proof layer uses environmentally friendly materials, reducing the environmental impact during cable manufacturing and use.

[0018] 2. This cable features a conductor shielding layer and an insulation shielding layer, enhancing its resistance to electromagnetic interference. An outer wrapping layer on the conductor further improves its high-voltage withstand capability. It utilizes annealed soft copper conductors made of high-quality oxygen-free copper, and imported 220kV-specific ultra-clean XLPE insulation material. The termite-proof layer uses nylon sheathing material. No chemical agents or microcapsules are required, making cable manufacturing, installation, and use convenient. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the novel anti-ant medium-voltage power cable of this utility model.

[0020] In the diagram: 1. Conductor; 2. Conductor shielding layer; 3. Insulation layer; 4. Insulation shielding layer; 5. Metal shielding layer; 6. Filling layer; 7. Wrapping layer; 8. Inner lining layer; 9. Anti-termite layer; 10. Outer sheath. Detailed Implementation

[0021] 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.

[0022] Reference Figure 1 A novel anti-termite medium-voltage power cable includes a conductor 1, a conductor shielding layer 2, an insulation layer 3, and an insulation shielding layer 4 arranged sequentially outside the conductor 1. The conductor shielding layer 2, insulation layer 3, and insulation shielding layer 4 are formed by three-layer co-extrusion. A metal shielding layer 5 is provided outside the insulation shielding layer 4. A wrapping layer 7 is provided outside the metal shielding layer 5. An inner lining layer 8 is provided outside the wrapping layer 7. An anti-termite layer 9 is provided outside the inner lining layer 8. The inner lining layer 8 and the anti-termite layer 9 are formed by two-layer co-extrusion. An outer sheath 10 is provided outside the anti-termite layer 9. The wrapping layer 7, inner lining layer 8, anti-termite layer 9, and outer sheath 10 constitute a comprehensive protective body.

[0023] Specifically, conductor 1 is an annealed soft copper conductor, and the cross-sectional area of ​​conductor 1 is 10-1000 mm². 2 The stranding method of conductors increases the surface area of ​​the conductor, reduces resistance, and decreases heat generation. Large-section conductors employ a segmented structure, effectively reducing electromagnetic interference, minimizing mutual interference between adjacent cables or equipment, and improving the stability and reliability of the cable system.

[0024] Conductor shielding layer 2 is a 10kV~35kV grade chemically cross-linked semiconducting inner shielding layer. The 10kV~35kV grade chemically cross-linked semiconducting inner shielding material includes a base material (EVA / LDPE), conductive carbon black, antioxidant, cross-linking agent (DCP), and lubricant. Uniform electric field distribution: Prevents electric field concentration caused by burrs or unevenness on the conductor surface, preventing partial discharge (PD). Tight bonding with the insulation layer: Ensures no air gap between the insulation layer (such as XLPE) and the conductor, reducing electrical treeing. Suppresses space charge accumulation: Improves the cable's dielectric strength and long-term stability.

[0025] Insulation layer 3 is a 10kV~35kV grade chemically cross-linked polyethylene insulation material, and nano-SiO2 and other materials are used to improve electrical strength.

[0026] The insulating shielding layer 4 is a 10kV~35kV grade chemically cross-linked outer shielding material, which smooths the surface of the insulating layer, avoids electric field distortion, and reduces partial discharge (PD).

[0027] The conductor shielding layer 2, the insulation layer 3, and the insulation shielding layer 4 are formed by three-layer co-extrusion.

[0028] The shielding layer 5 is made of annealed soft copper strip. The metal shielding layer 5 includes multiple metal shielded cores, which are arranged outwardly, and a filler layer 6 is provided between the multiple metal shielded cores.

[0029] Filler layer 6 consists of fan-shaped filler strips. The materials are mica sheets and ceramic fibers, used for fan-shaped thermal insulation. These fill the fan-shaped gaps between cable cores, providing cushioning, fixation, and insulation.

[0030] The wrapping layer 7 is made of non-woven fabric. It is made of polyester (PET), polypropylene (PP), or glass fiber, and is soft, tear-resistant, and breathable.

[0031] The inner lining layer 8 is made of linear low-density polyethylene sheath material. Polyethylene sheaths are characterized by good toughness, low density, and no pollution, and have good environmental protection and durability.

[0032] The anti-termite layer 9 is made of nylon sheath material. Nylon sheath has excellent properties such as high hardness, smooth surface, wear resistance, and tear resistance.

[0033] The outer sheath 10 is made of polyvinyl chloride, polyethylene, or halogen-free low-smoke sheath material. The outer sheath has good mechanical properties, protects the termite-proof sheath from mechanical damage, and meets the requirements of the operating environment.

[0034] The cable has a reasonable overall structure, and through its design and termite-proof measures, it effectively prevents termite infestation. Furthermore, the termite-proof layer uses environmentally friendly materials, reducing the environmental impact during cable manufacturing and use, aligning with the trend of green and environmentally friendly development.

[0035] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A novel anti-termite medium-voltage power cable, comprising a conductor (1), characterized in that: The conductor (1) is provided with a conductor shielding layer (2), an insulation layer (3) and an insulation shielding layer (4) in sequence. The conductor shielding layer (2), the insulation layer (3) and the insulation shielding layer (4) are formed by three-layer co-extrusion. The insulation shielding layer (4) is provided with a metal shielding layer (5) outside. The metal shielding layer (5) is provided with a wrapping layer (7) outside. The wrapping layer (7) is provided with an inner lining layer (8) outside. The inner lining layer (8) is provided with an anti-termite layer (9) outside. The inner lining layer (8) and the anti-termite layer (9) are formed by two-layer co-extrusion. The anti-termite layer (9) is provided with an outer sheath (10) outside. The wrapping layer (7), the inner lining layer (8), the anti-termite layer (9) and the outer sheath (10) form a comprehensive protective body.

2. The novel anti-termite medium-voltage power cable according to claim 1, characterized in that: The conductor (1) is an annealed soft copper conductor with a segmented structure and a cross-sectional area of ​​10-1000 mm². 2 .

3. The novel anti-termite medium-voltage power cable according to claim 1, characterized in that: The metal shielding layer (5) includes multiple metal shielded cores, which are arranged outwardly. A filling layer (6) is provided between the multiple metal shielded cores. The filling layer (6), wrapping layer (7), inner lining layer (8), anti-termite layer (9), and outer sheath (10) form a comprehensive protective body.

4. The novel anti-termite medium-voltage power cable according to claim 1, characterized in that: The conductor shielding layer (2) is a chemically cross-linked semiconducting inner shielding layer of 10kV~35kV level, and the insulating shielding layer (4) is a chemically cross-linked outer shielding layer of 10kV~35kV level.

5. The novel anti-termite medium-voltage power cable according to claim 1, characterized in that: The insulation layer (3) is a 10kV~35kV grade chemically cross-linked polyethylene insulation layer.

6. The novel anti-termite medium-voltage power cable according to claim 3, characterized in that: The filling layer (6) is a fan-shaped filling strip.

7. The novel anti-termite medium-voltage power cable according to claim 1, characterized in that: The wrapping layer (7) is a non-woven fabric.

8. The novel anti-termite medium-voltage power cable according to claim 1, characterized in that: The inner lining (8) is a linear low-density polyethylene sheath material.

9. The novel anti-termite medium-voltage power cable according to claim 1, characterized in that: The anti-ant layer (9) is made of nylon sheath material.

10. The novel anti-termite medium-voltage power cable according to claim 1, characterized in that: The outer sheath (10) is made of polyvinyl chloride, polyethylene or halogen-free low-smoke sheath material.

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