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CN-122025250-A - Weather-resistant environment-friendly low-voltage power cable and preparation process thereof

CN122025250ACN 122025250 ACN122025250 ACN 122025250ACN-122025250-A

Abstract

The invention discloses a weather-resistant environment-friendly low-voltage power cable and a preparation process thereof, and belongs to the technical field of cable preparation. The preparation process of the weather-proof environment-friendly low-voltage power cable comprises the following steps of drawing a copper rod by using a wire drawing machine, annealing and twisting to obtain a conductor material, preparing a rubber compound, adding the rubber compound into a single-screw extruder, heating, shearing and melting the rubber compound to wrap the rubber compound on the conductor material to form an insulating layer, twisting six conductor materials wrapped with the insulating layer, filling hemp ropes in the twisting process to obtain a cable core, extruding and wrapping a shielding tape outside the cable core, wrapping the shielding tape by using a copper strip to form a shielding layer, and wrapping the rubber compound on the shielding layer by using the extruder to obtain the weather-proof environment-friendly low-voltage power cable. The cable prepared by the method has excellent flame retardant property and ageing resistance.

Inventors

  • LI XISHU
  • WANG ZHIQIANG
  • XU XUEMEI

Assignees

  • 河北优胜电缆有限公司

Dates

Publication Date
20260512
Application Date
20260227

Claims (10)

  1. 1. The preparation process of the weather-proof environment-friendly low-voltage power cable is characterized by comprising the following steps of: drawing, annealing and stranding a copper rod by using a wire drawing machine to obtain a conductor material; sequentially adding polyurethane, a composite flame retardant, a modified weather-resistant agent, nano silicon dioxide, an antioxidant and a lubricant into an internal mixer, and mixing and stirring to obtain a rubber compound; Step three, adding the rubber compound into a single screw extruder, heating, shearing and melting the rubber compound to wrap the rubber compound on a conductor material to form an insulating layer; Twisting six conductor materials wrapped with an insulating layer, and filling hemp ropes in the twisting process to obtain a cable core; And fifthly, extruding and wrapping the isolation belt outside the cable core, wrapping with a copper belt to form a shielding layer, and wrapping the rubber compound on the shielding layer through an extruder to obtain the weather-resistant environment-friendly power cable.
  2. 2. The process for preparing the weather-resistant environment-friendly low-voltage power cable according to claim 1, wherein the preparation method of the composite flame retardant comprises the following steps: q1, sequentially adding 3, 4-dibromo-N-methylmaleimide, para-aminobenzene borate, methyltrioctyl ammonium chloride and tetrahydrofuran into a container, stirring and reacting in an argon atmosphere, then adding Pd (PPh 3 ) 4 , performing anaerobic reaction, performing rotary evaporation, extracting, purifying and vacuum drying to obtain a product; Q2, adding the product and 4, 4-biphenyl dicarboxaldehyde into a container filled with ethanol, heating and refluxing for reaction, filtering, washing and vacuum drying to obtain the composite flame retardant.
  3. 3. The process for preparing the weather-resistant environment-friendly low-voltage power cable according to claim 2, wherein the dosage ratio of 3, 4-dibromo-N-methylmaleimide, p-aminobenzene borate, methyltrioctyl ammonium chloride, tetrahydrofuran and Pd (PPh 3 ) 4 ) in the Q1 is (2.44-2.85) g (3.62-4.07) g (0.88-1.26) mL (90-110) mL (0.23-0.38) g.
  4. 4. The process for preparing the weather-resistant environment-friendly low-voltage power cable according to claim 2, wherein the dosage ratio of the product, 4-biphenyl dicarboxaldehyde and ethanol in the Q2 is (3.68-4.32) g (0.43-0.66) g (45-55) mL.
  5. 5. The process for preparing the weather-resistant environment-friendly low-voltage power cable according to claim 1, wherein the preparation method of the modified weather-resistant agent comprises the following steps: S1, sequentially adding quinazoline-4-ketone, 1, 2-dichloroethane, thionyl chloride and N, N-dimethylformamide into a container, heating, stirring, refluxing for reaction, and then performing rotary evaporation, dissolution, washing, drying and recrystallization to obtain an organic matter 1; S2, adding the organic matter 1, 4-dioxane and methyl hexahydroisonicotinate into a container, heating, refluxing, carrying out suction filtration, and drying to obtain an organic matter 2, adding the organic matter 2, sodium hydroxide and distilled water into the container, stirring at room temperature, carrying out reaction, filtering, adjusting pH, suction filtration, and drying to obtain an organic matter 3; And S3, adding the organic matter 3, EDC hydrochloride, 1-hydroxybenzotriazole and N, N-diisopropylethylamine into a container filled with dichloromethane, stirring at room temperature, adding 4- (trifluoromethyl) phenylhydrazine, reacting at room temperature, washing, drying, concentrating under reduced pressure, drying, and recrystallizing to obtain the modified weather-resistant agent.
  6. 6. The process for preparing the weather-resistant environment-friendly low-voltage cable according to claim 5, wherein the dosage ratio of quinazoline-4-ketone, 1, 2-dichloroethane, thionyl chloride and N, N-dimethylformamide in S1 is (4.88-5.12) g (45-55) mL (20-28) mL (0.45-0.54) mL.
  7. 7. The preparation process of the weather-resistant environment-friendly low-voltage power cable according to claim 5, wherein the using amount ratio of the organic matters 1, 4-dioxane and methyl hexahydroisonicotinate in S2 is (4.28-4.36) g (44-56) mL (5.12-5.45) mL, and the using amount ratio of the organic matters 2, sodium hydroxide and distilled water in S3 is (7.68-8.42) g (1.68-1.96) g (20-30) mL.
  8. 8. The process for preparing the weather-resistant environment-friendly low-voltage power cable according to claim 5, wherein in the S3, the dosage ratio of the organic matter 3, EDC hydrochloride, 1-hydroxybenzotriazole, N-diisopropylethylamine, methylene dichloride and 4- (trifluoromethyl) phenylhydrazine is (1.02-1.36) g (0.28-0.34) g (0.18-0.25) g (0.88-1.21) mL (28-32) mL (1.23-1.45) g.
  9. 9. The preparation process of the weather-resistant environment-friendly low-voltage power cable according to claim 1, wherein in the first step, a copper rod with the diameter of 8mm is pulled into a copper wire with the diameter of 0.6-1.2mm, in the second step, the mass ratio of polyurethane to a composite flame retardant to a modified weather-resistant agent to nano silicon dioxide to an antioxidant to a lubricant is (80-90): 12-18): 0.88-2.35): 3-8): 0.5-0.9): 1-3, and in the third step, the temperature of a single screw extruder is 160-200 ℃.
  10. 10. A weather-resistant environment-friendly low-voltage power cable, which is prepared by the preparation process according to any one of claims 1 to 9.

Description

Weather-resistant environment-friendly low-voltage power cable and preparation process thereof Technical Field The invention belongs to the technical field of cable preparation, and particularly relates to a weather-resistant environment-friendly low-voltage power cable and a preparation process thereof. Background The traditional low-voltage cable mainly uses polyvinyl chloride as a main stream in material selection, and the material has the advantages of low cost, excellent processing performance and the like, but a stabilizer of heavy metals such as lead, cadmium and the like is added in the production process to enhance the thermal stability and weather resistance of the material. However, the heavy metal elements are difficult to degrade naturally after the cable is abandoned, soil and water sources are polluted after long-term accumulation, and if a fire disaster happens, a large amount of highly toxic substances such as hydrogen chloride gas, dioxin and the like are released when the PVC burns, so that serious harm is caused to the ecological environment and the respiratory system and the nervous system of a human body. Meanwhile, the outdoor laid cable needs to bear ultraviolet radiation, ozone erosion and extreme temperature difference change for a long time, so that the outer sheath is gradually hardened and cracked, the performance of the insulating layer is deteriorated, even short circuit or electric leakage accidents are caused, the safe and stable operation of the power system is threatened, and the maintenance cost and the power failure risk are increased. The patent CN120199543B discloses a water-blocking type aluminum composite core low-voltage power cable for a photovoltaic power generation system and a preparation method thereof, and the water-blocking type aluminum composite core low-voltage power cable comprises a special-shaped aluminum alloy conductor core group formed by twisting, wherein a water-tree resistant insulating layer is extruded outside the special-shaped aluminum alloy conductor core group, the water-tree resistant insulating layers are arranged in a circular array, and an aluminum-plastic composite belt, a polyethylene lining layer, an armored steel belt and a weather-resistant polyethylene outer protective layer are sequentially arranged from inside to outside according to the axis of the circular array of the water-tree resistant insulating layers. According to the power cable, the radial and longitudinal water blocking of the power cable is performed through the water blocking adhesive layer and the water blocking filling layer, and meanwhile, the aluminum-plastic composite belt, the polyethylene lining layer, the armored steel belt and the weather-proof polyethylene outer protective layer are matched to improve the structural strength, water blocking and weather resistance of the power cable, so that the generation of a water tree is reduced, and the service life of the power cable is prolonged. The weather resistance of the cable prepared by the method is guaranteed to a certain extent, but a lifting space is still provided. Due to the limitation of the weather-proof polyethylene outer protective layer material, the performance of the weather-proof polyethylene outer protective layer material can be gradually attenuated in extremely severe weather, such as long-term strong ultraviolet irradiation, extremely cold or extremely hot alternating environments. Moreover, the combination tightness degree between the armor steel belt and the outer protection layer and the synergistic effect of the materials of each layer under the complex environment are not ideal, so that the cable can still be damaged in structure caused by environmental corrosion in long-term use, and the overall performance and the service life of the cable are affected. Disclosure of Invention The invention aims to provide a weather-resistant environment-friendly low-voltage power cable and a preparation process thereof, which are used for solving the technical problems of poor weather resistance and flame retardance of the cable in the prior art. In order to achieve the above purpose, the present invention adopts the following technical scheme: The invention provides a preparation process of a weather-resistant environment-friendly low-voltage power cable, which comprises the following steps: drawing, annealing and stranding a copper rod by using a wire drawing machine to obtain a conductor material; sequentially adding polyurethane, a composite flame retardant, a modified weather-resistant agent, nano silicon dioxide, an antioxidant and a lubricant into an internal mixer, and mixing and stirring to obtain a rubber compound; Step three, adding the rubber compound into a single screw extruder, heating, shearing and melting the rubber compound to wrap the rubber compound on a conductor material to form an insulating layer; Twisting six conductor materials wrapped with an insulating layer, and filling he