CN-121528620-B - High-strength aging-resistant overhead insulated conductor

Abstract

The invention relates to the technical field of insulated wires, and provides a high-strength aging-resistant overhead insulated wire. The high-strength anti-aging overhead insulated wire sequentially comprises a conductor and an insulating layer from inside to outside, wherein the insulating layer comprises, by weight, 80 parts of polyethylene, 15-20 parts of styrene-butadiene rubber, 10-18 parts of ethylene propylene diene monomer rubber, 3-5 parts of zinc oxide, 1-2 parts of a vulcanizing agent, 0.5-1 part of an accelerator, 5-7 parts of a compatilizer, 2-3 parts of zinc stearate and 8-12 parts of a reinforcing auxiliary agent, and the reinforcing auxiliary agent comprises, by weight, 20 parts of carbon black, 4-8 parts of silicone powder and 5-10 parts of zinc diacrylate. Through the technical scheme, the problem that the mechanical property of the insulating layer of the overhead insulated wire is relatively poor in the related art is solved.

Inventors

• ZHANG JUN
• XU BIN
• HAN WEI
• Bai Xianduan
• XU BO
• FANG YUE
• XIA JUANJUAN
• JIN JIAJUN
• XIA WEIWEI
• CHEN XIAODONG

Assignees

• 安徽明都电力线缆有限公司

Dates

Publication Date

20260512

Application Date

20260116

Claims (8)

1. 1. The high-strength aging-resistant overhead insulated wire sequentially comprises a conductor and an insulating layer from inside to outside, and is characterized in that the insulating layer comprises the following components in parts by weight: 80 parts of polyethylene, 15-20 parts of styrene-butadiene rubber, 10-18 parts of ethylene propylene diene monomer, 3-5 parts of zinc oxide, 1-2 parts of vulcanizing agent, 0.5-1 part of accelerator, 5-7 parts of compatilizer, 2-3 parts of zinc stearate and 8-12 parts of reinforcing auxiliary agent; the raw materials of the reinforcing auxiliary agent comprise the following components in parts by weight: 20 parts of carbon black, 4-8 parts of silicone powder and 5-10 parts of zinc diacrylate; the raw materials of the reinforcing auxiliary agent further comprise 2-6 parts of zinc acetylacetonate.
2. 2. The high strength, aging resistant overhead insulated conductor of claim 1, wherein the conductor is one of an aluminum alloy conductor and a copper alloy conductor.
3. 3. The high-strength aging-resistant overhead insulated wire according to claim 1, wherein the raw materials of the reinforcing auxiliary agent further comprise a silane coupling agent, and the addition amount of the silane coupling agent is 8% -15% of the weight of the carbon black.
4. 4. The high-strength aging-resistant overhead insulated conductor according to claim 1, wherein the vulcanizing agent comprises one or two of sulfur and dicumyl peroxide; The accelerator comprises one or two of accelerator H and accelerator TMTD.
5. 5. The high strength, aging resistant overhead insulated conductor of claim 1, wherein the compatibilizer comprises one or both of maleic anhydride grafted polyethylene and maleic anhydride grafted ethylene propylene diene monomer.
6. 6. The high-strength aging-resistant overhead insulated wire according to claim 1, wherein the raw materials of the insulating layer further comprise 1-3 parts of antioxidant and 2-5 parts of plasticizer.
7. 7. The high strength, aging resistant overhead insulated conductor of claim 6, wherein the antioxidant comprises one or more of antioxidant 1010, antioxidant 1024, antioxidant 264; the plasticizer comprises one or more of dinonyl phthalate, tricresyl phosphate and dioctyl phthalate.
8. 8. A high strength, aging resistant overhead insulated conductor as claimed in claim 3, wherein the method of preparing the reinforcing aid comprises the steps of: b1, adding the silane coupling agent into an ethanol water solution, adding the carbon black and the silicone powder, uniformly mixing, concentrating, and drying to obtain a first pretreatment mixture; B2, dispersing the zinc acetylacetonate in absolute ethyl alcohol, adding the first pretreatment mixture, uniformly mixing, concentrating, and drying to obtain a second pretreatment mixture; and B3, blending the zinc diacrylate and the second pretreatment mixture, and ball milling to obtain the reinforcing auxiliary agent.

Description

High-strength aging-resistant overhead insulated conductor Technical Field The invention relates to the technical field of insulated wires, in particular to a high-strength aging-resistant overhead insulated wire. Background The overhead insulated conductor is an important component in the power transmission and distribution network, and by coating the insulating layer outside the conductor, potential safety hazards such as short circuit and electric leakage existing in the traditional bare conductor due to direct exposure to the environment are effectively avoided, meanwhile, the space occupation of a line corridor is reduced, and the reliability and safety of power supply are improved. Therefore, the overhead insulated conductor is widely applied to power transmission in the fields of urban power grids, industrial and mining enterprises, rural power grid transformation and the like. As power demand continues to grow, power systems place higher demands on the performance of overhead insulated conductors. In particular, in the long-term outdoor operation process, the insulated wire needs to continuously bear the test of mechanical stress, environmental temperature change, ultraviolet radiation and other complex factors. This requires that the insulating layer material not only has excellent initial electrical insulation properties, but also has good mechanical strength and environmental aging resistance. Currently, common insulating layer materials for overhead insulated conductors mainly comprise Polyethylene (PE), polyvinyl chloride (PVC) and rubber materials. The ethylene propylene diene monomer is characterized in that the main chain saturation of the ethylene propylene diene monomer is higher, carbon-carbon single bonds are adopted, only a small amount of unsaturated carbon-carbon double bonds are contained in side chains, the molecular structure is relatively stable, and good weather resistance is shown, however, the ethylene propylene diene monomer lacks self-reinforcement, the mechanical property of the pure rubber is relatively lower, and the ethylene propylene diene monomer is helpful for electrical insulation and ageing resistance in an insulating layer, but the effective improvement of the mechanical property is limited. In order to improve the mechanical properties of the rubber insulation material in the insulation layer, reinforcing fillers such as carbon black, white carbon black and the like are generally required to be added. Carbon black is the most commonly used reinforcing agent, but the dispersion uniformity of the carbon black in a rubber matrix and the interface bonding strength of the carbon black and rubber molecules are relatively poor, so that stress concentration points are easily formed in the material, the improvement of mechanical strength is not facilitated, and the aging failure process of the material in a thermal oxygen environment can be accelerated. Therefore, an overhead insulated wire is provided, and an insulating layer of the overhead insulated wire has good mechanical properties, which has important significance for meeting the requirements of a power system on the overhead insulated wire with high reliability and long service life. Disclosure of Invention The invention provides a high-strength aging-resistant overhead insulated wire, which solves the problem that the mechanical property of an insulating layer of the overhead insulated wire is relatively poor in the related art. The technical scheme of the invention is as follows: The invention provides a high-strength aging-resistant overhead insulated wire which sequentially comprises a conductor and an insulating layer from inside to outside, wherein the insulating layer comprises the following raw materials in parts by weight: 80 parts of polyethylene, 15-20 parts of styrene-butadiene rubber, 10-18 parts of ethylene propylene diene monomer, 3-5 parts of zinc oxide, 1-2 parts of vulcanizing agent, 0.5-1 part of accelerator, 5-7 parts of compatilizer, 2-3 parts of zinc stearate and 8-12 parts of reinforcing auxiliary agent; the raw materials of the reinforcing auxiliary agent comprise the following components in parts by weight: 20 parts of carbon black, 4-8 parts of silicone powder and 5-10 parts of zinc diacrylate. As a further technical scheme, the conductor is one of an aluminum alloy conductor and a copper alloy conductor, and is preferably an aluminum alloy conductor. As a further technical scheme, the raw materials of the reinforcing auxiliary agent further comprise a silane coupling agent, wherein the addition amount of the silane coupling agent is 8% -15% of the weight of the carbon black, for example, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, preferably 8%, 12% and 15%. In the invention, the raw materials of the reinforcing auxiliary agent also comprise a silane coupling agent, and the addition of the silane coupling agent can better combine zinc diacrylate with carbon black and silicone powder, so that the