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Rat-proof and termite-proof cable and preparation method thereof

A rodent-proof cable and termite-proof technology, applied in cable/conductor manufacturing, insulated cables, power cables with shielding layer/conductive layer, etc., can solve cable faults, affect rodent-proof performance, and cable sheath bite through And other problems, to achieve the effect of high bending strength and impact strength, good scratch resistance, rodent and ant resistance, and good environmental protection effect

Pending Publication Date: 2020-08-25
信承瑞电缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Under the concept of economic development of energy conservation and environmental protection, the high-voltage and ultra-high-voltage transmission methods characterized by "high energy efficiency and low loss" have become the inevitable direction of the development of the power industry. The problem of damage is also becoming more and more prominent, especially the problem of anti-rodent and ant cables. Small rodents such as mice and termites often bite through the cable sheath
The damage of the outer sheath will cause multi-point grounding of the corrugated aluminum sheath, and the electromagnetic induction of the conductor current will increase the circulation of the metal sheath of the cable during operation, reducing the transmission capacity of the line
At the same time, the damage of the outer sheath makes the corrugated aluminum sheath of the inner layer corroded by the surrounding environment for a long time, and then endangers the main insulation, until the insulation breaks down or even explodes, causing permanent failure of the cable line and affecting the normal use of the cable.
The conventional method is to add anti-rodent and ant additives to the sheath. The anti-rodent and ant additives have the effect of repelling or killing termites, but the effect of the anti-rodent and ant additives will affect the anti-rodent and ant performance with time and environmental changes. Until it fails, once the anti-rodent and ant effect fails, the cable will fail and the service life of the cable will be affected by the erosion of termites

Method used

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  • Rat-proof and termite-proof cable and preparation method thereof
  • Rat-proof and termite-proof cable and preparation method thereof
  • Rat-proof and termite-proof cable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] refer to figure 1 As shown, this embodiment provides a new type of rodent-proof cable, including a cable core and a protective layer. The cable core is twisted by at least one insulated core. The insulated core includes a conductor 10 and is wrapped around the conductor 10 in turn. The outer conductor shielding layer 20, the insulating layer 30, and the insulating shielding layer 40. The protection layer includes an inner sheath 80 , a nylon sheath 90 and an outer sheath 100 in sequence along the axial direction away from the cable core.

[0057] The preparation method of the rodent-proof cable of this embodiment is:

[0058] 1. Preparation of nylon sheath material: take 30kg of nylon resin with weight average molecular weight ≥ 15,000 and viscosity ≥ 15g / min, modifier 5kg, lubricant 0.3kg, antioxidant 1kg, aluminum hydroxide 70kg, zinc borate 20kg, 2kg of anti-termite masterbatch, 5kg of silicone masterbatch and 10kg of brown corundum micropowder are mixed evenly at ...

Embodiment 2

[0064] refer to figure 2 Shown, as the novel anti-rodent and ant cable of embodiment 2 of the present invention, comprise: buffering water blocking belt 50, metal sheath layer 60, anticorrosion layer 70, inner sheath 80, nylon sheath 90, outer sheath 100 and semiconducting layer 110 .

[0065] The preparation method is as follows:

[0066] 1. Preparation of nylon sheath material: take 40kg of nylon resin with weight average molecular weight ≥ 15,000 and viscosity ≥ 15g / min, modifier 7kg, lubricant 0.4kg, antioxidant 1.5kg, aluminum hydroxide 95kg, zinc borate 35kg , 3kg of anti-termite masterbatch, 6.5kg of silicone masterbatch and 12.5kg of brown corundum micropowder are mixed uniformly at 25-75°C, kneaded, mixed, extruded at 195-215°C, cooled by hot water, cut Granules to make nylon sheath material;

[0067] 2. The preparation steps of the finished cable are as follows:

[0068] The first step is to wrap the buffer water-blocking tape 50 on the cable core; the second st...

Embodiment 3

[0074] Other operating steps and cable structure in this embodiment are the same as those in Embodiment 2, except for the ingredients of the nylon sheath material.

[0075] The ingredients of the nylon sheath material in this example are: 50 kg of nylon resin with weight average molecular weight ≥ 15,000 and viscosity ≥ 15 g / min, 10 kg of modifier, 0.5 kg of lubricant, 2 kg of antioxidant, 120 kg of aluminum hydroxide, 50kg of zinc borate, 4kg of anti-termite masterbatch, 8kg of silicone masterbatch and 15kg of brown corundum micropowder.

[0076] The modifier used in this example is a combination of thermoplastic elastomer and polyolefin elastomer polypropylene.

[0077] The lubricant used in this example is calcium stearate.

[0078] The antioxidant used in this example is dihydroquinoline.

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Abstract

The invention provides a rat-proof and termite-proof cable and a preparation method thereof. The cable comprises a cable core and a protective layer. The protective layer mainly comprises an inner sheath, a nylon sheath and an outer sheath. The nylon sheath is mainly prepared from nylon resin, a modifier, a lubricant, an antioxidant, aluminum hydroxide, zinc borate, an anti-termite master batch, silicone master batch and brown fused alumina micro powder. According to the invention, the inner sheath is added, and the nylon sheath is arranged between the inner sheath and the outer sheath to formthe rat-proof and termite-proof layer, so that the mechanical and physical properties and strength of the cable are improved; an excellent protection effect can still be achieved under the conditionthat the outer sheath is damaged; and the cable is stable and long in duration time; and compared with a common rat-proof and termite-proof additive, the nylon sheath has a more environment-friendly effect and does not cause pollution to soil and the environment.

Description

technical field [0001] The invention relates to the field of power cables, in particular to a rodent-proof cable and a preparation method thereof. Background technique [0002] Under the concept of economic development of energy conservation and environmental protection, the high-voltage and ultra-high-voltage transmission methods characterized by "high energy efficiency and low loss" have become the inevitable direction of the development of the power industry. The problem of destruction is also becoming more and more prominent, especially the problem of anti-rodent and ant cables. Small rodents such as mice and termites often bite through the cable sheath. The damage of the outer sheath will cause multi-point grounding of the corrugated aluminum sheath, and the electromagnetic induction of the conductor current will increase the circulation of the metal sheath of the cable during operation, reducing the transmission capacity of the line. At the same time, the damage of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/02H01B7/18H01B7/20H01B7/28H01B7/282H01B7/29H01B7/295H01B9/02H01B13/00
CPCH01B7/02H01B7/1875H01B7/205H01B7/2806H01B7/2813H01B7/2825H01B7/29H01B7/295H01B9/02H01B13/00
Inventor 李玥
Owner 信承瑞电缆有限公司
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