Rodent and termite resistant fire resistant light weight power cable

Abstract

The utility model discloses a kind of fireproof light power cable of rat and termite prevention, including conductor, the outside of the conductor is equipped with shielding layer, the outside of the shielding layer is equipped with insulating layer, the outside of the insulating layer is equipped with inner protective layer, the outside of the inner protective layer is equipped with physical protection layer, the outside of the physical protection layer is equipped with protective net layer, in the utility model, the power cable, by inner protective layer inner layer elastic memory resistance layer hardens and releases chlorpyrifos when receiving ≥5N bite pressure, outer layer honeycomb metal-ceramic composite layer improves bite resistance strength;Physical protection layer forms barrier with material hardness;Protective net layer can release medicament, and the defense capability of rat and termite bite is improved compared with traditional cable by multilayer protection;And insulating layer uses high-temperature resistant material to guarantee fireproof basis;Inner protective layer outer layer honeycomb metal-ceramic composite layer can form fireproof barrier when meeting fire.These structures cooperate and improve the fire resistance in fire situation compared with traditional cable.

Description

Technical Field

[0001] This utility model mainly relates to the field of power cable technology, specifically a rodent-proof, fire-resistant, and lightweight power cable. Background Technology

[0002] In power transmission systems, power cables serve as a crucial carrier for energy transmission, and their operational safety and stability are directly related to the normal operation of industrial production, urban construction, and residents' lives.

[0003] However, traditional cables mostly use a single armor layer or ordinary sheath for protection, which can only rely on the hardness of the material itself to form a simple physical barrier. When rodents gnaw on them, the continuous mechanical force generated can easily break through the traditional protective structure, while insects such as ants can gradually erode the outer layer of the cable through the gaps, causing damage to the cable insulation layer and exposure of the conductor, leading to safety accidents such as short circuits and leakage. The traditional defense mechanism is simple and has limited effectiveness. Utility Model Content

[0004] This utility model provides a solution that addresses the problem of overly simplistic existing technical solutions. It offers a significantly different solution, primarily a rodent- and ant-proof, fire-resistant, lightweight power cable. This addresses the technical problems mentioned in the background section, where traditional cables rely on a single armor layer or ordinary sheath for protection. These cables depend solely on the hardness of the material to form a simple physical barrier, resulting in a limited and ineffective defense mechanism. They are easily breached by the continuous mechanical force of rodents, and ants and other insects can erode the outer layer through gaps, leading to insulation damage, conductor exposure, and accidents such as short circuits and leakage.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A rodent-proof, fire-resistant, lightweight power cable includes a conductor, a shielding layer on the outside of the conductor, an insulation layer on the outside of the shielding layer, an inner sheath on the outside of the insulation layer, a physical protection layer on the outside of the inner sheath, a protective mesh layer on the outside of the physical protection layer, and an outer sheath on the outside of the protective mesh layer.

[0006] More preferably, the insulation layer is made of high-temperature resistant insulation material, which not only provides insulation but also serves as a fire-resistant base layer for the cable.

[0007] More preferably, the inner protective layer includes an inner layer and an outer layer. The inner layer is an elastic memory barrier layer, which is injection molded from a blend of shape memory polyurethane and glass microspheres. The outer layer is a honeycomb metal-ceramic composite layer, which adopts a 304 stainless steel micro-honeycomb structure and is filled with expanded vermiculite and ceramicized silicone rubber particles.

[0008] Preferably, the physical protective layer is made of thin steel strip armor, which uses the material's hardness to resist rodent and ant bites.

[0009] More preferably, the protective mesh layer is composed of a silane coupling agent bonding layer, a temperature-sensitive PNIPAm hydrogel layer, a permethrin / capsaicin microcapsule composite functional layer, and a nano-ZnO ultraviolet shielding layer, with each layer surface sequentially coated in the above order to form an integral structure.

[0010] More preferably, the outer protective layer is made of low-smoke halogen-free polyolefin, with spiral ridges embossed on the surface, and magnesium-aluminum alloy wires of a certain diameter embedded in the ridges.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This power cable features an inner sheath with an elastic memory barrier layer that instantly hardens (increasing its hardness to Shore D80) when subjected to a biting pressure of ≥5N from rodents and ants. It resists biting through physical strength, while simultaneously releasing permethrin solution (diffusion radius 5cm) from the ruptured glass microspheres, achieving dual protection of "physical resistance + chemical repellency." Its outer honeycomb metal-ceramic composite layer, with its 304 stainless steel micro-honeycomb structure (compressive strength ≥20MPa), enhances its biting resistance, further blocking rodent and ant intrusion. The physical protective layer uses high-hardness polyolefin or thin steel tape armor, forming another physical barrier through material hardness, reducing the possibility of rodents and ants breaching the inner layer. When bitten, the protective mesh layer releases trace amounts of permethrin / capsaicin (harmless to humans), achieving precise targeting of rodents and ants. This multi-layered structure works synergistically, significantly improving its defense against rodent and ant bites compared to traditional cables.

[0012] 2. This power cable's insulation layer uses high-temperature resistant insulating materials such as silicone rubber and fluoroplastics, with a long-term temperature resistance of over 120℃ and the ability to withstand even higher temperatures in the short term. As the fire-resistant base layer of the cable, it maintains stable insulation performance even in high-temperature environments, providing basic fire resistance protection for the overall structure. When the honeycomb metal-ceramic composite layer of the inner sheath is exposed to fire (≥300℃), the expanded vermiculite (1-3mm particle size) within the honeycomb cavity expands three times its original size, and the ceramicized silicone rubber particles (0.5mm particle size) sinter, rapidly forming a sealed fire-resistant barrier that effectively blocks the spread of fire and protects the internal structure. Simultaneously, the outermost sheath uses low-smoke halogen-free polyolefin material, which does not release toxic gases or large amounts of smoke during combustion, reducing the hazards of toxic gases and visibility reduction during a fire, thus improving safety at the fire scene. These structural elements work together to enhance the cable's fire resistance and safety in fire conditions compared to traditional cables.

[0013] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0015] Numbering on the map: 1. Conductor; 2. Shielding layer; 3. Insulation layer; 4. Inner protective layer; 5. Physical protective layer; 6. Protective mesh layer; 7. Outer protective layer. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0018] Please refer to the appendix carefully. Figure 1 A rodent-proof, fire-resistant, lightweight power cable includes a conductor 1, a shielding layer 2 on the outside of the conductor 1, an insulation layer 3 on the outside of the shielding layer 2, an inner sheath 4 on the outside of the insulation layer 3, a physical protection layer 5 on the outside of the inner sheath 4, a protective mesh layer 6 on the outside of the physical protection layer 5, and an outer sheath 7 on the outside of the protective mesh layer 6.

[0019] In this embodiment, as Figure 1 As shown, insulation layer 3 is made of high-temperature resistant insulating material, such as silicone rubber (SR), fluoroplastics (FEP, PFA) or high-temperature cross-linked polyethylene (XLPE). These materials have certain temperature resistance (long-term temperature resistance above 120℃, and short-term resistance to higher temperatures), which not only provides insulation but also serves as the fire-resistant base layer of the cable.

[0020] In this embodiment, as Figure 1As shown, the inner protective layer 4 includes an inner layer and an outer layer. The inner layer is an elastic memory barrier layer, which is made by injection molding a blend of shape memory polyurethane (Tg=60℃) and glass microspheres (prepared by in-situ polymerization, with a diameter of 300μm, a cell wall thickness of 5μm, and hollow containing permethrin solution), with a thickness of 1.0mm. It is flexible at room temperature (elongation at break ≥400%), and hardens instantly (hardness increases to Shore D80) when subjected to rodent and ant biting pressure (≥5N). At the same time, the glass microspheres break and release repellent (diffusion radius 5cm). The outer layer is a honeycomb metal-ceramic composite layer, using a 304 stainless steel micro-honeycomb structure (honeycomb pore size 0.5mm×0.5mm, wall thickness 0.03mm). The honeycomb cavity is filled with expanded vermiculite (particle size 1-3mm) and ceramicized silicone rubber particles (particle size 0.5mm). At room temperature, the honeycomb structure improves the bite resistance (compressive strength ≥20MPa). When exposed to fire (≥300℃), the vermiculite expands 3 times and the ceramicized particles sinter, forming a sealed fire-resistant barrier.

[0021] In this embodiment, as Figure 1 As shown, the physical protective layer 5 is armored with high-hardness polyolefin (such as modified PP) or thin steel strip (0.2-0.3mm), which uses the hardness of the material to resist the gnawing of rodents and ants, while also taking into account the weight reduction (the steel strip is treated with anti-corrosion).

[0022] In this embodiment, as Figure 1 As shown, the protective mesh layer 6 consists of a silane coupling agent bonding layer (0.5–1.2 μm), a temperature-sensitive PNIPAm hydrogel layer (10–20 μm), a permethrin / capsaicin microcapsule composite functional layer (25–35 μm), and a nano-ZnO ultraviolet shielding layer. Each layer is sequentially coated to form the overall structure. The silane coupling agent bonding layer serves as the "basic connecting unit" of the protective mesh layer. The porous structure of the temperature-sensitive PNIPAm hydrogel layer acts as an intermediate transition layer, coordinating the material differences between the upper and lower layers, reducing structural internal stress caused by thermal expansion and contraction, and improving overall fatigue resistance. The sustained-release characteristics of the permethrin / capsaicin microcapsule composite functional layer prevent environmental pollution caused by excessively high instantaneous concentrations of the pesticide, improving safety. Permethrin is a highly effective and low-toxicity insecticide that can quickly repel or kill harmful organisms such as mosquitoes and mites. Capsaicin has strong irritant properties and can deter birds and rodents from consuming the protective mesh through physical deterrence. The two work synergistically to form a combination of "chemical killing + physical deterrence." The dual protection enhances the range and effectiveness of protection; the nano-ZnO ultraviolet shielding layer blocks ultraviolet rays, protects the inner material from aging and prevents the efficacy of the medicine from failing, improves the overall weather resistance, resists wind and rain, and maintains the integrity of the structure.

[0023] In this embodiment, as Figure 1As shown, the outer sheath 7 is made of low-smoke halogen-free polyolefin (density 0.92 g / cm³), with spiral ridges embossed on the surface (10 mm pitch, 0.8 mm ridge height), which increases the friction of the outer sheath 7 surface. The ridges are embedded with 0.1 mm diameter magnesium-aluminum alloy wires (the magnesium-aluminum alloy wires are micro-arc anodized (film thickness 10 μm, insulation resistance > 100 MΩ)). The 0.1 mm diameter magnesium-aluminum alloy wires have high strength and toughness, and being embedded in the ridges can improve the tensile and tear resistance of the outer sheath 7.

[0024] Manufacturing process of this utility model: I. Preparation of Conductor 1 Material selection: High-purity electrolytic copper (purity ≥99.95%) or 6061 aluminum alloy is used to process monofilaments with a diameter of 0.1~0.5mm.

[0025] Stranding process: The monofilaments are stranded into a conductor using a stranding machine. The stranding pitch (pitch-to-diameter ratio 20~25) is designed according to the current carrying capacity requirements to ensure the roundness and flexibility of the conductor. If it is a hard conductor, it needs to be annealed (temperature 300~400℃, heat preservation for 2~3 hours) to eliminate internal stress.

[0026] Surface treatment: The conductor surface is ultrasonically cleaned to remove oil stains and dried for later use (to avoid affecting the subsequent bonding of the shielding layer).

[0027] II. Shielding layer 2 covering Material preparation: Semi-conductive polyethylene (SCP) or semi-conductive silicone rubber is used, and the granules are dried (moisture content ≤0.05%).

[0028] Extrusion coating: The semiconductive material is extruded onto the outside of the conductor using a 45-type extruder (die head temperature 180~200℃), with the thickness controlled at 0.5~1.0mm to ensure a smooth surface without bubbles; for high-voltage cables, a composite process of wrapping semiconductive tape + extruding semiconductive layer can be used to improve shielding uniformity.

[0029] Cooling and shaping: The material is rapidly cooled in a water cooling tank (water temperature 20~30℃) to prevent shrinkage and deformation.

[0030] III. Molding of Insulation Layer 3 Material pretreatment: Select silicone rubber (SR) or fluoroplastic (FEP) granules. For silicone rubber, add vulcanizing agent (such as dicumyl peroxide, 1~2%) and mix evenly (mixing temperature 80~100℃, time 15~20 minutes).

[0031] Continuous extrusion: Using a 65-type screw extruder (silicone rubber die head temperature 120~150℃, fluoroplastic 280~320℃), the insulating material is extruded onto the outside of the shielding layer. The thickness is designed according to the voltage level (approximately 2.5~3.0mm for 10kV level), and the extrusion speed is 3~5m / min.

[0032] Vulcanization / Curing: The silicone rubber insulation layer needs to be vulcanized and shaped in a continuous vulcanization tube (temperature 200~220℃, pressure 0.8~1.0MPa); the fluoroplastics are cured by natural cooling to ensure an insulation resistance ≥10¹. 4 Ω・cm.

[0033] IV. Inner protective layer 4 composite processing Inner layer (elastic memory barrier layer) preparation: Shape memory polyurethane (Tg=60℃) particles and permethrin-containing glass microspheres (300μm in diameter) are mixed at a mass ratio of 9:1 and then melt-blended using a twin-screw extruder (temperature 160~180℃) to produce a composite masterbatch.

[0034] The masterbatch is injected onto the outside of the insulating layer using an injection molding machine (mold temperature 60~80℃), with the thickness controlled at 1.0mm, to ensure that the glass microspheres are evenly dispersed (≥50 particles per square centimeter).

[0035] Outer layer (honeycomb metal-ceramic composite layer) preparation: The micro-honeycomb structure with a honeycomb aperture of 0.5mm×0.5mm is made by stamping and forming 304 stainless steel strip (thickness 0.03mm) and then wound around the outside of the elastic memory barrier layer with an overlap width of 1~2mm and fixed by laser spot welding.

[0036] Expanded vermiculite (particle size 1~3mm) and ceramicized silicone rubber particles (particle size 0.5mm, mass ratio 1:1) are filled into the honeycomb cavity, with a filling rate ≥90%, and then the honeycomb opening is sealed with silicone rubber.

[0037] V. Physical protective layer 5 armor Material selection: Use 0.2~0.3mm thick galvanized thin steel strip (zinc layer thickness ≥8μm) or modified PP strip (hardness ≥Shore D75).

[0038] Armoring process: The steel strip is spirally wrapped around the outside of the inner protective layer using an armoring machine, with a wrapping angle of 30~45° and an overlap rate of ≥15%; if it is PP strip, an extrusion composite process (temperature 170~190℃) is used to ensure a tight fit with the inner layer.

[0039] Corrosion protection: The steel strip surface is coated with an epoxy resin coating (thickness 5~10μm) and cured at 120℃ to improve corrosion resistance.

[0040] VI. Protective netting layer with more than 6 layers of wrapping Silane coupling agent bonding layer: Silane coupling agent (such as KH550) is coated on the surface of the physical protective layer by a roller coater, with the thickness controlled at 0.5~1.2μm, and then dried with hot air at 100℃ for 30 seconds to form an activated surface.

[0041] Thermosensitive PNIPAm hydrogel layer: PNIPAm hydrogel (concentration 10%) is coated onto the adhesive layer using a slot coater to a thickness of 10~20μm, and then crosslinked and cured in a constant temperature water bath at 30℃ for 2 hours to form a porous structure.

[0042] Permethrin / capsaicin microcapsule composite functional layer: Microcapsules (core material: permethrin: capsaicin = 3:1, wall material: gelatin-gum arabic, particle size 5~10μm) were prepared in advance and mixed with an aqueous adhesive at a mass ratio of 4:1.

[0043] The microcapsules were coated onto the hydrogel layer using a doctor blade coater to a thickness of 25-35 μm and then dried at 60°C for 10 minutes to ensure uniform distribution.

[0044] PVDF piezoelectric sensing layer: A PVDF thin film (thickness 5~10μm) was deposited on the surface of the composite functional layer by magnetron sputtering with a sputtering power of 100W and a vacuum degree of 5×10⁻³Pa. Subsequently, sensing units (one unit per 10cm²) were prepared by laser etching.

[0045] Nano ZnO UV shielding layer: Mix nano ZnO (particle size 20~30nm) with acrylic resin (solid content 30%), and apply it evenly to the surface of the sensing layer using a sprayer, with a thickness of 5~8μm, and cure at room temperature for 24 hours.

[0046] 7. Outer Sheath 7 Extrusion and Molding Material preparation: Low-smoke halogen-free polyolefin granules (with added flame retardant magnesium hydroxide, content 60%) are dried (moisture content ≤0.1%).

[0047] Embedding of ribs and metal wires: Install a spiral rib mold (10mm pitch, 0.8mm rib height) at the die head of a 90-type extruder, and simultaneously embed a 0.1mm diameter magnesium-aluminum alloy wire (with micro-arc oxidation treatment on the surface) into the rib groove through a wire guide device.

[0048] Extrusion coating: Extrusion temperature 160~190℃, speed synchronized with the inner layer (2~4m / min) to ensure uniform outer layer thickness (≥1.2mm) and complete ridge forming.

[0049] Cooling and Traction: After being shaped by segmented water cooling (water temperature gradient 20~60℃), the traction force of the traction machine is controlled at 500~800N to avoid structural deformation.

[0050] VIII. Finished Product Inspection and Winding Performance testing: Electrical properties: Insulation resistance (≥10¹) 4 Ω・cm), withstand voltage (10kV class ≥30kV / 1min without breakdown); Mechanical properties: tensile strength (≥12MPa), elongation at break (≥150%). Special performance characteristics: fire resistance test (950℃×180min without short circuit), rodent and ant resistance test (no damage after 30 days of rodent and ant infestation).

[0051] Winding and packaging: The cable is wound onto a reel (diameter ≤ 1.2m) using a winding machine, wrapped with protective film, and then stored in the warehouse, labeled with the model, length, and production date.

[0052] Process characteristics description Interlayer synergistic control: Each layer undergoes plasma surface treatment (activation energy ≥40mN / m) before coating to ensure interlayer peel strength ≥1.5N / cm; Precision parameter control: Key processes (such as microcapsule coating and PVDF sputtering) employ online thickness monitoring (accuracy ±0.5μm) to avoid dimensional deviations; Environmental compatibility: The low-smoke halogen-free material processing is equipped with a waste gas treatment device (activated carbon adsorption + UV photolysis) to meet VOCs emission requirements.

[0053] The specific operating procedure of this utility model is as follows: Conductor 1, as the core transmission component, is responsible for power conduction. Its outer shielding layer 2 can effectively isolate external electromagnetic interference, ensuring that the current transmitted by conductor 1 remains stable, and providing basic power transmission guarantee for subsequent layers of protection.

[0054] The insulation layer 3 outside the shielding layer 2 is made of high-temperature resistant insulating materials such as silicone rubber and fluoroplastics. Thanks to its excellent insulation properties, it can prevent current leakage and achieve reliable electrical insulation. At the same time, this material can withstand temperatures above 120℃ for long periods and even higher temperatures for short periods, maintaining stable insulation performance even in high-temperature environments. It serves as the fire-resistant base layer of the cable, ensuring the safety of the overall structure under high-temperature conditions. The inner sheath 4, located outside the insulation layer 3, comprises an inner layer and an outer layer, forming a dual protection. The inner elastic memory barrier layer is injection molded from a blend of shape memory polyurethane and glass microspheres containing permethrin solution. It is flexible at room temperature (elongation at break ≥400%), meeting the requirements for cable bending and laying. When subjected to a biting pressure of ≥5N from rodents or ants, the material instantly hardens (hardness increases to Shore D80), resisting biting through physical strength. At the same time, the glass microspheres rupture, releasing the permethrin solution (diffusion radius 5cm), achieving dual protection of "physical resistance + chemical repellency". The outer honeycomb metal-ceramic composite layer, with its 304 stainless steel micro-honeycomb structure (honeycomb pore size 0.5mm×0.5mm, wall thickness 0.03mm), can improve the bite resistance (compressive strength ≥20MPa) and disperse external impact at room temperature. When exposed to fire at ≥300℃, the expanded vermiculite (particle size 1-3mm) in the honeycomb cavity will expand 3 times, and the ceramicized silicone rubber particles (particle size 0.5mm) will sinter, quickly forming a sealed fire-resistant barrier to prevent the spread of fire and protect the internal structure. The physical protective layer 5 on the outside of the inner protective layer 4 is armored with high-hardness polyolefin (such as modified PP) or thin steel strip (0.2-0.3mm). It uses the hardness of the material itself to directly resist the gnawing of rodents and ants, serving as the first physical barrier on the outside of the inner protective layer 4, further reducing the possibility of rodents and ants breaking through the inner layer. At the same time, the steel strip is treated with anti-corrosion. The protective mesh layer 6 outside the physical protective layer 5 is composed of a silane coupling agent bonding layer (0.5-1.2μm), a temperature-sensitive PNIPAm hydrogel layer (10-20μm), a permethrin / capsaicin microcapsule composite functional layer (25-35μm), and a nano ZnO ultraviolet shielding layer. When rodents bite, the permethrin / capsaicin microcapsules are punctured, releasing the agent into the rodents. In addition, the nano ZnO ultraviolet shielding layer can also provide ultraviolet protection for the protective mesh layer 6, extending its service life. The outermost sheath 7 is made of low-smoke halogen-free polyolefin (density 0.92g / cm³), which does not release toxic gases or large amounts of smoke during combustion, improving safety in fire scenarios. Its lightweight nature also reduces overall weight, facilitating transportation, installation, and maintenance. The spiral ribs embossed on its surface (10mm pitch, 0.8mm rib height) increase surface friction, improving gripping convenience during handling and installation. The 0.1mm diameter magnesium-aluminum alloy wire embedded within the ribs, with its high strength and toughness, further enhances the tensile and tear resistance of the outer sheath 7, especially strengthening the stability of the rib structure and preventing breakage or deformation due to external forces. In summary, this utility model, through the precise coordination of each layer of structure, forms a protective system from basic insulation and fire resistance to passive defense, active response, and outer auxiliary reinforcement, ensuring the safe and stable operation of conductor 1.

[0055] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A rodent-proof, fire-resistant, lightweight power cable, comprising a conductor (1), characterized in that: The conductor (1) has a shielding layer (2) on its outer side, an insulating layer (3) on its outer side, an inner protective layer (4) on its outer side, a physical protective layer (5) on its outer side, a protective mesh layer (6) on its outer side, and an outer protective layer (7) on its outer side.

2. The rodent-proof, fire-resistant, lightweight power cable according to claim 1, characterized in that: The insulation layer (3) is made of high-temperature resistant insulation material, which not only provides insulation but also serves as a fire-resistant base layer for the cable.

3. The rodent-proof, fire-resistant, lightweight power cable according to claim 1, characterized in that: The inner protective layer (4) includes an inner layer and an outer layer. The inner layer is an elastic memory barrier layer, which is made by injection molding of shape memory polyurethane and glass microspheres. The outer layer is a honeycomb metal-ceramic composite layer, which adopts a 304 stainless steel micro-honeycomb structure. The honeycomb cavity is filled with expanded vermiculite and ceramicized silicone rubber particles.

4. The rodent-proof, fire-resistant, lightweight power cable according to claim 1, characterized in that: The physical protective layer (5) is made of thin steel strip armor, which uses the hardness of the material to resist the biting of rats and ants.

5. The rodent-proof, fire-resistant, lightweight power cable according to claim 1, characterized in that: The protective mesh layer (6) is composed of a silane coupling agent bonding layer, a temperature-sensitive PNIPAm hydrogel layer, a permethrin / capsaicin microcapsule composite functional layer and a nano ZnO ultraviolet shielding layer. The surfaces of each layer are sequentially coated in the above order to form an integral structure.

6. The rodent-proof, fire-resistant, lightweight power cable according to claim 1, characterized in that: The outer protective layer (7) is made of low-smoke halogen-free polyolefin with spiral ridges embossed on the surface and magnesium-aluminum alloy wires of a certain diameter embedded in the ridges.

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