Cable with rat bite prevention function

Abstract

The utility model discloses a cable with a rat bite prevention function, which comprises a conductor layer, an insulating layer, a shielding layer and a sheath layer, the sheath layer is coated with a rat-proof layer, the rat-proof layer is composed of a high-strength aramid fiber braid layer and a polymer coating containing rat-repelling additives, and through the synergistic effect of high-density braid of aramid fibers and the rat-repelling coating, the rat-repelling additives can be effectively prevented from being bitten by rats, and the rat-repelling additives can be effectively prevented from being bitten by rats. And mechanical protection and chemical repelling functions are considered, and the flexibility and lightweight design of the cable are maintained at the same time.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cable technical field, concretely relates to a cable with anti -rat bite function. BACKGROUND

[0002] The existing cable is easy to be bitten by rodents in underground or storage environment, which causes damage to the cable insulation layer and leads to safety hazards such as short circuit and open circuit. At present, some cables use ordinary plastic sheath, but cannot effectively prevent rodents from biting, increasing maintenance cost and accident risk.

[0003] However, in actual application environment, cables often face the problem of being bitten by rodents. The teeth of rodents grow rapidly and need to bite objects constantly to grind their teeth. The outer surface material of the cable has a certain attraction to them and becomes a common biting target. Once the cable is bitten by rodents, the insulation layer is damaged, which may cause serious faults such as short circuit and electric leakage, not only causing power interruption and abnormal signal transmission, affecting the normal production and life, but also causing fire accidents and other safety accidents, bringing huge economic losses and safety hazards.

[0004] At present, some cables on the market improve the anti-rat biting performance by adding a protective layer, but the existing protective layer often has some shortcomings. For example, some simple rubber protective layers have a certain elasticity, but the hardness is not enough to effectively resist the sharp teeth of rodents. While some metal protective layers have high hardness, but poor flexibility, which may crack during the bending process of the cable, affecting the protection effect and increasing the weight and cost of the cable. For example, CN217544210U uses a metal armor layer, which can improve the hardness, but increases the bending radius of the cable to more than 20D (D is the outer diameter of the cable), and the weight per unit length increases by 35%-50%, which is difficult to adapt to complex wiring scenarios. In addition, a method for manufacturing a new type of anti-rat biting cable is also disclosed in the prior art, which includes an armor layer, a flame-retardant layer, a water-absorbing layer, a cross-linked polyethylene insulation layer, and a cat-mewing vibrator. The cat-mewing vibrator is added to scare away rats, and the water-absorbing layer is used to prevent moisture and moisture problems. However, the cat-mewing vibrator is an electronic device, which has poor tolerance to humid and corrosive environments, cannot effectively prolong its service life, and has high failure rate and high maintenance cost.

[0005] Therefore, it is of great practical significance to develop a cable that can effectively prevent rat bites and has good flexibility and low cost. SUMMARY

[0006] The utility model aims at providing a cable with anti-rat bite function, which aims to achieve the synergistic effect of high-density aramid fiber weaving and rat-repelling coating, and to balance mechanical protection and chemical repellent function, while maintaining the flexibility and lightweight design of the cable.

[0007] To solve the above technical problems, the utility model discloses the purpose is realized as follows:

[0008] The cable with the rat bite prevention function comprises a conductor layer, an insulation layer, a shielding layer and a sheath layer, the sheath layer is coated with a rat prevention layer, and the rat prevention layer is composed of a high-strength aramid fiber braiding layer and a polymer coating containing a rat repelling additive.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the braiding density of the aramid fiber braiding layer is greater than or equal to 90%.

[0010] On the basis of the above scheme and as a preferred scheme of the above scheme: the rat repelling additive is a natural plant extract or an environmentally friendly chemical rat repelling agent.

[0011] On the basis of the above scheme and as a preferred scheme of the above scheme: the rat prevention layer and the sheath layer are seamlessly combined through an adhesive layer.

[0012] The utility model discloses the beneficial technical effect that is prominent compared with prior art is: through the synergistic effect of aramid fiber high-density braiding and rat repelling coating, mechanical protection and chemical repellent function are considered, and the flexibility and lightweight design of the cable are maintained simultaneously.Compared with the mode of metal armor or electronic device, the aramid fiber + coating process in the application reduces the material cost by about 30%, and does not need later maintenance; the rat repelling additive can select natural plant component or environmentally friendly chemical rat repelling agent, and also can effectively avoid the adverse influence on the surrounding environment and soil of cable laying. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the whole structure schematic diagram of the utility model.

[0014] 1-conductor 1, 2-insulation layer, 3-shielding layer, 4-sheath layer, 5-rat prevention layer. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantage of the present application more clear, the technical scheme in the embodiment will be described clearly and completely in the following with reference to the drawings, obviously, the described embodiment is only a part of the embodiment of the present application, not all the embodiment. Based on the embodiment given, all other embodiments obtained by those skilled in the art without making creative labor belong to the scope of protection of the present application.

[0016] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "up", "down" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0017] In detail Figure 1 As shown in the figure, the cable with the anti-rat bite function includes a conductor 1, an insulation layer 2, a shielding layer 3, and a sheath layer 4. The sheath layer 4 is coated with an anti-rat layer 5, which is composed of a high-strength aramid fiber braided layer and a polymer coating containing a rat repellent additive. Specifically, in this embodiment, the conductor layer 1 uses high-conductivity copper wire to improve signal transmission efficiency. The insulation layer 2 uses cross-linked polyethylene material to ensure good electrical insulation performance. The shielding layer 3 uses double shielding of aluminum foil and braided copper mesh to improve electromagnetic interference resistance. The sheath layer 4 uses low-smoke halogen-free flame-retardant material to improve fire performance and reduce harmful gas release. The braiding density of the aramid fiber braided layer is ≥90%. The high-density aramid braided layer (density ≥90%) forms a physical anti-bite barrier, with a specific strength of 8 times that of steel wire, reducing the total weight of the cable by 42.7% while achieving equivalent protection.

[0018] The anti-rat layer 5 uses a high-strength aramid fiber braided layer with a braiding density of ≥90%. The aramid fiber braided layer (1414 type aramid) is in a spiral cross-braided structure with a braiding angle of 45°-60°, preferably 55°, and a wire bundle gap of ≤0.1 mm, ensuring anti-bite capability. At the same time, a rat repellent additive is coated to improve the anti-rat effect. Specifically, the rat repellent additive is a natural plant extract or an environmentally friendly chemical rat repellent, such as a polymer coating containing 0.5%-1.5% capsaicin extract or cyclodextrin inclusion rat repellent on the outer surface of the aramid fiber braided layer. Of course, nano-silicon dioxide particles with a particle size of 50-100 nm can also be dispersed in the polymer coating, with an addition amount of 2%-3% of the total mass of the coating, to extend the release period of the rat repellent to more than 5 years.

[0019] In addition, to improve the bonding strength between the anti-rat layer 5 and the sheath layer 4, the anti-rat layer and the sheath layer are seamlessly combined through an adhesive layer in this embodiment. Specifically, there is an epoxy resin adhesive layer between the aramid fiber braided layer and the sheath layer, which improves the bonding strength between the aramid fiber braided layer and the sheath layer, achieving an interfacial peeling strength of ≥5 N / mm.

[0020] The slow-release technology of embedding rat repellent molecules into the polymer coating forms a synergistic protection with the dense structure of the aramid layer. When rodents come into contact with the cable, they are first hindered from biting by the aramid layer, and at the same time, the rat repellent components released in the coating stimulate the oral mucosa of the rodents, prompting them to voluntarily give up biting. Experiments show that the anti-rat bite failure time of the cable under double protection is extended to 3.2 times that of single protection.

[0021] Comparison experiment:

[0022] Take three groups of cables of the same specification to conduct anti-rat bite accelerated tests:

[0023] Control group A: Traditional steel wire armored cable (tensile strength 1200MPa);

[0024] Control group B: PVC-sheathed cable with vibration rodent repellent;

[0025] Experimental group: This utility model cable (aramid braiding density 92%, coating containing 1.2% capsaicin);

[0026] Test index Control group A Control group B Experimental group Average biting penetration time 48 hours 72 hours 312 hours Bending fatigue life 5000 times 8000 times 15000 times Unit weight (kg / km) 2850 1950 1650 Maintenance cost (yuan / year) 0 220 0

[0027] It should be noted that the protection of control group B failed after the battery was depleted (around the 6th month).

[0028] Therefore, compared to traditional metal armor protection, the cable of this application is more than 40% lighter while maintaining the same shear strength; compared to active vibration rodent repellent devices, this solution requires no external power source and is maintenance-free. The rodent-proof layer and the sheath layer are bonded together with epoxy resin to achieve a seamless interface, which has been tested to withstand a biting force of 10 N·m, while the rodent repellent release rate is over 95%, significantly extending the cable's service life in areas with high rodent infestation rates.

[0029] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A cable with rodent-proof function, comprising a conductor layer, an insulation layer, a shielding layer, and a sheath layer, characterized in that: The sheath layer is coated with a rat-proof layer, which is composed of a high-strength aramid fiber woven layer and a polymer coating containing a rat-repellent additive.

2. The cable with a rat bite protection function according to claim 1, characterized in that: The woven density of the aramid fiber woven layer is greater than or equal to 90%.

3. The cable with a rat bite protection function according to claim 1, characterized in that: The rat-repellent additive is a natural plant extract or an environmentally-friendly chemical rat-repellent agent.

4. The cable with a rat bite protection function according to claim 1, characterized in that: The rat-proof layer and the sheath layer are seamlessly combined through an adhesive layer.

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