A concentric conductor anti-ultraviolet aluminum alloy cable

Abstract

The present invention discloses a concentric conductor UV-proof aluminum alloy cable. Multiple aluminum alloy conductor cores are concentrically arranged on the outside of a tensile strength core and twisted together to form a cable core. The aluminum alloy conductor core includes an aluminum alloy conductor and a nitrile polyvinyl chloride insulation layer, a first UV protection layer, and a silver-plated nickel tape armor layer sequentially coated on the outside of the aluminum alloy conductor. The tensile strength core is formed by twisting a mixture of fine steel wire and aramid yarn. The outside of the cable core is sequentially coated with a tinned copper wire and aramid yarn braided shielding layer, a pearlescent sand composite filling layer, a basalt fiber cloth tape heat-insulating and flame-retardant reinforcement layer, a corrugated aluminum alloy inner sheath, a second UV protection layer, and an outer UV protection sheath. The UV protection layer of the present invention uses a carbon black UV protection layer. Carbon black materials are widely available, inexpensive, have good UV protection capabilities, and are highly reliable. In addition, the UV protection layer is provided on the outside of the insulation layer to effectively prevent the insulation layer from being cracked or severely corroded by sunlight over time, thereby extending the service life of the insulation layer.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, in particular to a concentric conductor ultraviolet-proof aluminum alloy cable. Background Art

[0002] The structure of most cables is relatively simple, mainly including aluminum alloy conductor, inner sheath, filler, and outer sheath. Many cables are installed outdoors and are exposed to natural light for a long time. They are especially susceptible to damage from ultraviolet rays. The cables are prone to cracking, and the cables have poor fire and waterproof effects and low flexibility. External moisture, dust and other debris can easily penetrate into the aluminum alloy conductor, affecting the use of the cables and posing a high safety hazard. Summary of the Invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes a concentric conductor UV-resistant aluminum alloy cable.

[0004] The technical solution adopted in the present invention is:

[0005] A concentric conductor UV-proof aluminum alloy cable comprises an aluminum alloy conductor core and a tensile strength core. A plurality of aluminum alloy conductor cores are concentrically arranged on the outside of the tensile strength core and twisted together to form a cable core. The aluminum alloy conductor core comprises an aluminum alloy conductor and a nitrile polyvinyl chloride insulation layer, a first UV protection layer, and a silver-plated nickel tape armor layer sequentially coated on the outside of the aluminum alloy conductor. The tensile strength core is formed by twisting a mixture of fine steel wire and aramid wire. The outside of the cable core is sequentially coated with a tinned copper wire and aramid yarn braided shielding layer, a pearlescent sand composite filling layer, a basalt fiber cloth tape heat-insulating and flame-retardant reinforcement layer, a corrugated aluminum alloy inner sheath, a second UV protection layer, and an outer UV protection sheath. The interior of the cable core is also filled with a thermal insulation layer, and the thermal insulation layer is doped with rubber rope.

[0006] The first and second anti-ultraviolet layers are both carbon black anti-ultraviolet layers.

[0007] The heat insulation layer is an asbestos filling layer.

[0008] The anti-ultraviolet outer sheath is a polyolefin outer sheath, and an anti-ultraviolet coating is applied on the outer side of the polyolefin outer sheath.

[0009] The anti-ultraviolet coating is formed by coating modified polypropylene powder coating.

[0010] The modified polypropylene powder coating is composed of the following raw materials in parts by weight:

[0011] 3-4 grams of triglycidyl isocyanurate, 1-2 grams of antioxidant DLTP, 1-2 grams of zinc pyrithione, 4-7 grams of polytetrafluoroethylene wax, 2-3 grams of oleic acid diethanolamide, 0.8-1 grams of tert-butyl-p-diphenol, 3-5 grams of 2,2-dihydroxymethylpropionic acid, 1-2 grams of silane coupling agent KH550, 100-130 grams of polypropylene, and 10-20 grams of montmorillonite powder.

[0012] The preparation method of the modified polypropylene powder coating comprises the following steps:

[0013] (1) calcining montmorillonite powder at 800-860°C for 1-2 hours, gradually cooling to 70-80°C, adding 2,2-dihydroxymethylpropionic acid, and stirring to room temperature to obtain pretreated clay powder;

[0014] (2) taking tert-butyl-p-diphenol, adding it to anhydrous ethanol 10-20 times its weight, stirring evenly to obtain an alcohol dispersion;

[0015] (3) Take silane coupling agent KH550, add it to 80-100 times its weight of deionized water, stir evenly, mix it with the above alcohol dispersion, stir evenly, add pretreated soil powder, ultrasonically disperse for 3-5 minutes, and evaporate to remove the solvent to obtain silane-modified soil powder;

[0016] (4) Mix polypropylene and triglycidyl isocyanurate, preheat at 90-100°C for 20-30 minutes, mix with the above-mentioned silane-modified clay powder, reduce the temperature to 60-65°C, keep warm and stir for 1-2 hours, add oleic acid diethanolamide, increase the temperature to 140-150°C, keep warm and stir for 2-3 hours, add polytetrafluoroethylene wax, antioxidant DLTP, and zinc pyrithione, stir evenly, feed into an extruder, melt extrude, cool, and granulate to obtain the product.

[0017] The advantages of the present invention are as follows: the present invention adds a tensile reinforcement core in the center of the cable, thereby increasing the mechanical strength of the cable, having a good tensile effect and being not easy to break; a heat insulation layer is filled inside the cable core, which not only has a good heat insulation effect, but also can support the internal structure of the cable core, making the cable structure more stable; the ultraviolet protection layer adopts a carbon black ultraviolet protection layer, which has a wide source of carbon black materials, is cheap, has good ultraviolet protection ability and high reliability; in addition, an ultraviolet protection layer is arranged on the outside of the insulating layer, which can effectively prevent the insulating layer from being cracked or severely corroded after long-term use, thereby extending the service life of the insulating layer; the ultraviolet protection outer sheath is able to resist the intrusion of high ultraviolet rays, high salt fog and high humidity environment; the basalt fiber cloth tape heat insulation and flame retardant reinforcement layer and the corrugated aluminum alloy inner sheath are matched, and have a good flame retardant effect. The present invention applies an anti-ultraviolet coating on the outside of the polyolefin outer sheath. The coating is prepared from modified polypropylene powder coating. By adding antioxidants such as DLTP and tert-butyl-p-diphenol, the anti-aging performance is greatly improved. Montmorillonite is used as a filler, which has high toughness. After surface treatment, it can be well compatible with the polypropylene matrix, thereby improving the surface strength of the coating and the stable mechanical protection performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1

[0021] A concentric conductor UV-proof aluminum alloy cable comprises an aluminum alloy conductor core and a tensile strength core. Multiple aluminum alloy conductor cores are concentrically arranged on the outside of the tensile strength core and twisted to form a cable core. The aluminum alloy conductor core comprises an aluminum alloy conductor 1 and a nitrile polyvinyl chloride insulation layer 2, an UV protection layer 1 3 and a silver-plated nickel tape armor layer 4 sequentially coated on the outside of the aluminum alloy conductor 1. The tensile strength core is formed by mixed and twisted fine steel wire 5 and aramid wire 6. The outside of the cable core is sequentially coated with a tinned copper wire and aramid yarn braided shielding layer 7, a pearlescent sand composite filling layer 8, a basalt fiber cloth tape heat insulation and flame retardant reinforcement layer 9, a corrugated aluminum alloy inner sheath 10, an UV protection layer 2 11 and an UV protection outer sheath 12. The interior of the cable core is also filled with a thermal insulation layer 13, and the thermal insulation layer 13 is doped with rubber rope 14.

[0022] The anti-ultraviolet layer 1 3 and the anti-ultraviolet layer 2 11 are both carbon black anti-ultraviolet layers.

[0023] The heat insulation layer 13 is an asbestos filling layer.

[0024] The anti-ultraviolet outer sheath 12 is a polyolefin outer sheath, and an anti-ultraviolet coating is applied on the outer side of the polyolefin outer sheath.

[0025] The UV resistant coating is applied by modified polypropylene powder coating.

[0026] Modified polypropylene powder coating is composed of the following raw materials in parts by weight:

[0027] Triglycidyl isocyanurate 3, antioxidant DLTP 1, zinc pyrithione 1, polytetrafluoroethylene wax 4, oleic acid diethanolamide 2, tert-butyl-p-diphenol 0.8, 2,2-dihydroxymethylpropionic acid 3, silane coupling agent kh550 1, polypropylene 100, montmorillonite powder 10.

[0028] The preparation method of modified polypropylene powder coating comprises the following steps:

[0029] (1) calcining montmorillonite powder at 800°C for 1 hour, gradually cooling to 70°C, adding 2,2-dihydroxymethylpropionic acid, and stirring to room temperature to obtain pretreated clay powder;

[0030] (2) Take tert-butyl-p-diphenol, add it to 10 times its weight of anhydrous ethanol, stir evenly, and obtain an alcohol dispersion;

[0031] (3) Take silane coupling agent KH550, add it to 80 times its weight of deionized water, stir evenly, mix it with the above alcohol dispersion, stir evenly, add pretreated soil powder, ultrasonically disperse for 3 minutes, and evaporate to remove the solvent to obtain silane-modified soil powder;

[0032] (4) Take polypropylene and triglycidyl isocyanurate, mix them, preheat them at 90°C for 20 minutes, mix them with the above-mentioned silane-modified clay powder, reduce the temperature to 60°C, keep them warm and stir for 1 hour, add oleic acid diethanolamide, increase the temperature to 140°C, keep them warm and stir for 2 hours, add polytetrafluoroethylene wax, antioxidant DLTP, and zinc pyrithione, stir them evenly, feed them into an extruder, melt-extrude, cool, and granulate to obtain the product.

[0033] Example 2

[0034] A concentric conductor UV-proof aluminum alloy cable comprises an aluminum alloy conductor core and a tensile strength core. Multiple aluminum alloy conductor cores are concentrically arranged on the outside of the tensile strength core and twisted to form a cable core. The aluminum alloy conductor core comprises an aluminum alloy conductor 1 and a nitrile polyvinyl chloride insulation layer 2, an UV protection layer 1 3 and a silver-plated nickel tape armor layer 4 sequentially coated on the outside of the aluminum alloy conductor 1. The tensile strength core is formed by mixed and twisted fine steel wire 5 and aramid wire 6. The outside of the cable core is sequentially coated with a tinned copper wire and aramid yarn braided shielding layer 7, a pearlescent sand composite filling layer 8, a basalt fiber cloth tape heat insulation and flame retardant reinforcement layer 9, a corrugated aluminum alloy inner sheath 10, an UV protection layer 2 11 and an UV protection outer sheath 12. The interior of the cable core is also filled with a thermal insulation layer 13, and the thermal insulation layer 13 is doped with rubber rope 14.

[0035] The anti-ultraviolet layer 1 3 and the anti-ultraviolet layer 2 11 are both carbon black anti-ultraviolet layers.

[0036] The heat insulation layer 13 is an asbestos filling layer.

[0037] The anti-ultraviolet outer sheath 12 is a polyolefin outer sheath, and an anti-ultraviolet coating is applied on the outer side of the polyolefin outer sheath.

[0038] The UV resistant coating is applied by modified polypropylene powder coating.

[0039] Triglycidyl isocyanurate 4, antioxidant DLTP 2, zinc pyrithione 2, polytetrafluoroethylene wax 7, oleic acid diethanolamide 3, tert-butyl-p-diphenol 1, 2,2-dimethylolpropionic acid 5, silane coupling agent KH550 2, polypropylene 130, montmorillonite powder 20.

[0040] The preparation method of modified polypropylene powder coating comprises the following steps:

[0041] (1) calcining montmorillonite powder at 860°C for 2 hours, gradually cooling to 80°C, adding 2,2-dihydroxymethylpropionic acid, and stirring to room temperature to obtain pretreated clay powder;

[0042] (2) Take tert-butyl-p-diphenol, add it to 20 times its weight of anhydrous ethanol, stir evenly, and obtain an alcohol dispersion;

[0043] (3) Take silane coupling agent KH550, add it to 100 times its weight of deionized water, stir evenly, mix it with the above alcohol dispersion, stir evenly, add pretreated soil powder, ultrasonically disperse it for 5 minutes, and evaporate it to remove the solvent to obtain silane-modified soil powder;

[0044] (4) Take polypropylene and triglycidyl isocyanurate, mix them, preheat them at 100°C for 30 minutes, mix them with the above-mentioned silane-modified clay powder, reduce the temperature to 65°C, keep them warm and stir for 2 hours, add oleic acid diethanolamide, increase the temperature to 150°C, keep them warm and stir for 3 hours, add polytetrafluoroethylene wax, antioxidant DLTP, and zinc pyrithione, stir them evenly, feed them into an extruder, melt-extrude, cool, and granulate to obtain the product.

[0045] The nitrile polyvinyl chloride insulation layer 2 has good ozone resistance and weather aging resistance, and has relatively high tensile strength, tensile stress, tear resistance, heat resistance and flame resistance. It also has oil resistance, fuel resistance and chemical resistance.

[0046] The silver-plated nickel tape armor layer 4 can provide mechanical protection for the conductor and enhance its tensile strength.

[0047] The corrugated aluminum alloy inner sheath 10 is wrapped around the basalt fiber cloth tape heat insulation and flame retardant reinforcement layer 9, so that the internal cable core is completely isolated from the outside world, the flame retardant performance of the cable is improved, and fire accidents caused by cable fire can be effectively avoided. The cable is also not easy to be punctured, thereby improving the safety performance of the cable.

[0048] The UV-resistant outer sheath is easy to form, has low cost and good economic benefits.

[0049] The present invention adds a tensile strength core at the center of the cable, thereby increasing the mechanical strength of the cable, achieving good tensile strength and preventing it from breaking easily.

[0050] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A concentric conductor UV-resistant aluminum alloy cable, characterized in that: The cable core comprises an aluminum alloy conductor core and a tensile strength core. Multiple aluminum alloy conductor cores are concentrically arranged on the outside of the tensile strength core and bundled and twisted to form a cable core. The aluminum alloy conductor core comprises an aluminum alloy conductor and a nitrile polyvinyl chloride insulation layer, a first UV protection layer, and a silver-plated nickel tape armor layer sequentially coated on the outside of the aluminum alloy conductor. The tensile strength core is formed by twisting a mixture of fine steel wire and aramid wire. The outside of the cable core is sequentially coated with a tinned copper wire and aramid yarn braided shielding layer, a pearlescent sand composite filling layer, a basalt fiber cloth tape heat insulation and flame retardant reinforcement layer, a corrugated aluminum alloy inner sheath, a second UV protection layer, and an outer UV protection sheath. The interior of the cable core is also filled with a thermal insulation layer, and the thermal insulation layer is doped with rubber rope. The first and second UV protection layers are both carbon black UV protection layers; The heat insulation layer is an asbestos filling layer; The anti-ultraviolet outer sheath is a polyolefin outer sheath, and an anti-ultraviolet coating is applied on the outer side of the polyolefin outer sheath; The anti-ultraviolet coating is formed by coating with modified polypropylene powder coating; The modified polypropylene powder coating is composed of the following raw materials in parts by weight: 3-4 grams of triglycidyl isocyanurate, 1-2 grams of antioxidant DLTP, 1-2 grams of zinc pyrithione, 4-7 grams of polytetrafluoroethylene wax, 2-3 grams of oleic acid diethanolamide, 0.8-1 grams of tert-butyl-p-diphenol, 3-5 grams of 2,2-dimethylolpropionic acid, 1-2 grams of silane coupling agent KH550, 100-130 grams of polypropylene, and 10-20 grams of montmorillonite powder; The preparation method of the modified polypropylene powder coating comprises the following steps: (1) calcining montmorillonite powder at 800-860°C for 1-2 hours, gradually cooling to 70-80°C, adding 2,2-dihydroxymethylpropionic acid, and stirring to room temperature to obtain pretreated clay powder; (2) taking tert-butyl-p-diphenol, adding it to anhydrous ethanol 10-20 times its weight, stirring evenly to obtain an alcohol dispersion; (3) Take silane coupling agent KH550, add it to 80-100 times its weight of deionized water, stir evenly, mix it with the above alcohol dispersion, stir evenly, add pretreated soil powder, ultrasonically disperse for 3-5 minutes, and evaporate to remove the solvent to obtain silane-modified soil powder; (4) Mix polypropylene and triglycidyl isocyanurate, preheat at 90-100°C for 20-30 minutes, mix with the above-mentioned silane-modified clay powder, reduce the temperature to 60-65°C, keep warm and stir for 1-2 hours, add oleic acid diethanolamide, increase the temperature to 140-150°C, keep warm and stir for 2-3 hours, add polytetrafluoroethylene wax, antioxidant DLTP, and zinc pyrithione, stir evenly, feed into an extruder, melt extrude, cool, and granulate to obtain the product.

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