A kind of elastic anti-extrusion power cable

Abstract

The present invention discloses an elastic anti-extrusion power cable, wherein a low-smoke halogen-free polyolefin insulation layer and an aluminum-plastic composite film shielding layer are sequentially coated on the outside of the conductor, two conductors are twisted and then coated with a Kevlar fiber braided layer to form a wire core, four wire cores are arranged in a central symmetrical manner, and a steel wire rope is provided at the center of the four wire cores and twisted into a cable core, and a flame-retardant tape wrapping layer, a TPV elastomer filling layer and a synthetic rubber anti-extrusion ring are sequentially coated on the outside of the cable core, an axial circular hole is opened inside the synthetic rubber anti-extrusion ring, and a carbon corrugated tube is laid in the circular hole. The present invention greatly increases the anti-extrusion performance of the cable by coating the TPV elastomer filling layer and the synthetic rubber anti-extrusion ring on the outside of the cable core, and a carbon corrugated tube is provided in the through hole, and the carbon corrugated tube has the characteristics of light weight, small bending radius, high external pressure resistance, etc., so that the cable has better anti-extrusion and tensile performance and is not easy to break.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to an elastic anti-extrusion power cable. Background Art

[0002] Power cables are cables used to transmit and distribute electrical energy. They are often used in urban underground power grids, lead-out lines of power stations, internal power supplies of industrial and mining enterprises, and underwater transmission lines across rivers and seas. In some cases, power cables are required to be resistant to extrusion. Since power cables are squeezed by the movement of processing parts, power cables are often squeezed and broken. When power cables are squeezed, the conductor core wires will inevitably be squeezed, thus affecting the quality of power transmission. Therefore, it is urgent to develop an elastic and anti-extrusion power cable.

[0003] Lignin, as a polydisperse, amorphous natural high molecular polymer, is the second largest renewable biomass resource in the plant kingdom. Together with cellulose and hemicellulose, it constitutes the main component of the plant skeleton. It can be obtained from renewable biomass raw materials such as wood and crop straw. It has the characteristics of wide distribution, low price, renewable and degradable. However, only a small part of lignin is currently used in the world. Most of it is discarded as waste or burned as fuel after concentration, which causes a great waste of resources. In recent years, with the enhancement of people's environmental awareness and the popularization of the concept of renewable resources, people have paid more and more attention to biomass resources represented by cellulose, lignin, starch and protein. How to effectively use biomass resources to modify existing polymer materials or develop new applications has become a research hotspot. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes an elastic anti-extrusion power cable.

[0005] The technical solution adopted by the present invention is:

[0006] An elastic anti-extrusion power cable comprises a conductor, a low-smoke halogen-free polyolefin insulation layer and an aluminum-plastic composite film shielding layer are sequentially coated on the outside of the conductor, two conductors are twisted into pairs and then coated with a Kevlar fiber braided layer to form a wire core, four wire cores are centrally symmetrically arranged, a steel wire rope is arranged at the center of the four wire cores and twisted into a cable core, a flame-retardant tape wrapping layer, a TPV elastomer filling layer and a synthetic rubber anti-extrusion ring are sequentially coated on the outside of the cable core, an axial circular hole is opened inside the synthetic rubber anti-extrusion ring, a carbon corrugated pipe is laid in the circular hole, and a nano-silicone waterproof glue filling layer, a glass fiber braided layer and a chloroprene rubber outer sheath are sequentially coated on the outside of the synthetic rubber anti-extrusion ring.

[0007] The inner side and the outer side of the carbon bellows are filled with heat dissipation fillers.

[0008] The gaps inside the cable core and the wire core are filled with flame retardant fillers.

[0009] The flame retardant filler is magnesium oxide powder.

[0010] A plurality of arc-shaped wear-resistant and pressure-resistant strips are evenly distributed on the outer side of the chloroprene rubber outer sheath.

[0011] The chloroprene rubber outer sheath comprises the following raw materials in parts by weight:

[0012] Chloroprene rubber 100-130, white carbon black 30-40, tert-butyldimethylchlorosilane 10-14, sulfur 2-3, cross-linking agent TAIC 1-2, zinc oxide 20-30, antioxidant RD 2-4, alkali lignin 20-30, trifluoroethyl methacrylate 5-10, methyl methacrylate 10-14, dibenzoyl peroxide 0.4-1, triethylamine 1-2.

[0013] The preparation method of the chloroprene rubber outer sheath comprises the following steps:

[0014] (1) taking dibenzoyl peroxide, adding it to 80-100 times its weight of dimethylformamide, stirring evenly, to obtain an initiator solution;

[0015] (2) Take tert-butyldimethylsilyl chloride, add it to 30-40 times of its weight of dimethylformamide, stir evenly, add alkali lignin, increase the temperature to 55-60° C., keep warm and stir for 2-3 hours to obtain silane-modified lignin;

[0016] (3) Mix trifluoroethyl methacrylate, methyl methacrylate and triethylamine, add to anhydrous ethanol 10-20 times the weight of the mixture, stir at 70-75° C. for 2.6-3 hours, and remove ethanol by rotary evaporation to obtain a modified monomer;

[0017] (4) taking the modified monomer, adding it to the initiator solution, stirring evenly, sending it into a reactor, introducing nitrogen, adjusting the temperature of the reactor to 70-80° C., adding the above-mentioned silane-modified lignin, stirring and reacting for 4-5 hours, discharging the material, and removing the solvent by rotary evaporation to obtain a modified material;

[0018] (5) Take the modified material, mix it with chloroprene rubber, put it into an oven, adjust the oven temperature to 110-120°C, bake it for 80-120 seconds, take it out, put the dried film on an open mill for mixing, and then produce a sheet;

[0019] (6) The finished film is left to stand for 10-12 hours, and white carbon black, zinc oxide, and antioxidant RD are added to the internal mixer for mixing. When the mixing temperature reaches 115-120°C, the rubber is discharged. Finally, the cross-linking agent TAIC and sulfur are added on the open mixer. The film is triangularly wrapped 5 times with a roller distance of 1mm. The film thickness is adjusted. The film is rolled 3 times with left and right broaches and then removed. The film is left to stand at room temperature for 24 hours.

[0020] The advantages of the present invention are:

[0021] The present invention greatly increases the anti-extrusion performance of the cable by coating the cable core with a TPV elastomer filling layer and a synthetic rubber anti-extrusion ring. A through hole is opened in the synthetic rubber anti-extrusion ring, and a carbon corrugated tube is arranged in the through hole. The carbon corrugated tube has the characteristics of light weight, small bending radius, high external pressure resistance, etc., so that the cable has better anti-extrusion and tensile performance and is not easy to break; the heat dissipation filler can dissipate the heat generated by the conductor, and increase the safety and stability of the cable. The outer sheath material of the present invention adopts modified chloroprene rubber, which itself has good physical and mechanical properties, oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance, and chemical reagent resistance. The invention has high tensile strength, elongation and reversible crystallinity. The surface resistance of the composite material is further improved by preheating and mixing it with a modified filler. The modified filler uses a fluorinated monomer modified by triethylamine as a coating polymer and silane-modified alkali lignin as a filler, which can not only reduce production costs, but also achieve a lightweight effect for the alkali lignin. The hydroxyl groups of the silane-modified lignin are consumed, and when mixed with the fluorinated monomer, it can have good hydrophobic properties, further improving the surface resistance and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention.

[0023] In the figure: conductor 1, low-smoke halogen-free polyolefin insulation layer 2, aluminum-plastic composite film shielding layer 3, Kevlar fiber braided layer 4, steel wire rope 5, flame retardant tape wrapping layer 6, TPV elastomer filling layer 7, synthetic rubber anti-extrusion ring 8, carbon corrugated pipe 9, nano-silicone waterproof glue filling layer 10, glass fiber braided layer 11, chloroprene rubber outer sheath 12, flame retardant filler 13, arc-shaped wear-resistant and pressure-resistant strips 14, heat dissipation filler 15. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0025] Example 1

[0026] like Figure 1As shown, an elastic anti-extrusion power cable includes a conductor 1, a low-smoke halogen-free polyolefin insulation layer 2 and an aluminum-plastic composite film shielding layer 3 are sequentially coated on the outside of the conductor 1, two conductors 1 are twisted and then coated with a Kevlar fiber braided layer 4 to form a core, four cores are arranged symmetrically, and a steel wire rope 5 is arranged at the center of the four cores and twisted into a cable core, and a flame-retardant tape wrapping layer 6, a TPV elastomer filling layer 7 and a synthetic rubber anti-extrusion ring 8 are sequentially coated on the outside of the cable core, an axial circular hole is opened inside the synthetic rubber anti-extrusion ring 8, a carbon corrugated tube 9 is laid in the circular hole, and a nano-silicone waterproof glue filling layer 10, a glass fiber braided layer 11 and a chloroprene rubber outer sheath 12 are sequentially coated on the outside of the synthetic rubber anti-extrusion ring 8. The nano-silicone waterproof glue filling layer 10 has a particularly good waterproof effect.

[0027] The TPV elastomer filling layer 7 has excellent dynamic fatigue resistance, high tear resistance, excellent weather resistance, good wear resistance, and outstanding corrosion resistance to water-based acid and alkali liquids and polar oils. It is arranged outside the cable core to protect the internal wire core from damage.

[0028] The carbon bellows 9 has a series of advantages such as light weight, small bending radius, high external pressure resistance, low insulation resistance, corrosion resistance, no leakage, rat bite prevention, good weather resistance, high yield, and can be bypassed in the event of obstacles.

[0029] The synthetic rubber anti-extrusion ring 8 can well ensure that the cable can quickly recover to its original shape after being squeezed and deformed, thereby ensuring the normal operation of the power cable, reducing damage and facilitating use.

[0030] The inner and outer sides of the carbon bellows 9 are filled with heat dissipation fillers 15, which can dissipate the heat generated by the conductor, are safe to use, and have good stability. The heat dissipation filler 15 is a heat dissipation filler bar or heat dissipation filler sand or other fillers with heat dissipation effect.

[0031] The gaps inside the cable core and the wire core are filled with flame retardant fillers 13.

[0032] The flame retardant filler 13 is magnesium oxide powder, which has a good flame retardant effect.

[0033] A plurality of arc-shaped wear-resistant and compression-resistant strips 14 are evenly distributed on the outside of the neoprene outer sheath 12. The arc-shaped wear-resistant and compression-resistant strips increase the external wear resistance of the cable, prevent the outer sheath from cracking, and extend the service life.

[0034] The chloroprene rubber outer sheath 12 comprises the following raw materials in parts by weight:

[0035] Chloroprene rubber 100, white carbon black 30, tert-butyldimethylchlorosilane 10, sulfur 2, cross-linking agent TAIC 2, zinc oxide 20, antioxidant RD 2, alkali lignin 20, trifluoroethyl methacrylate 5, methyl methacrylate 10, dibenzoyl peroxide 0.4, triethylamine 1.

[0036] The method for preparing the chloroprene rubber outer sheath comprises the following steps:

[0037] (1) Take dibenzoyl peroxide, add it to 80 times its weight of dimethylformamide, stir evenly, and obtain an initiator solution;

[0038] (2) Take tert-butyldimethylsilyl chloride, add it to 30 times its weight of dimethylformamide, stir evenly, add alkali lignin, raise the temperature to 55°C, keep stirring for 2 hours, and obtain silane-modified lignin;

[0039] (3) trifluoroethyl methacrylate, methyl methacrylate and triethylamine were mixed and added to anhydrous ethanol in an amount 10 times the weight of the mixture, and the mixture was stirred at 70° C. for 2.6 hours, and the ethanol was removed by rotary evaporation to obtain a modified monomer;

[0040] (4) taking the modified monomer, adding it to the initiator solution, stirring evenly, sending it into a reactor, introducing nitrogen, adjusting the temperature of the reactor to 70° C., adding the above-mentioned silane-modified lignin, stirring and reacting for 4 hours, discharging the material, and removing the solvent by rotary evaporation to obtain a modified material;

[0041] (5) Take the modified material, mix it with chloroprene rubber, put it into an oven, adjust the oven temperature to 110°C, bake it for 80 seconds, take it out, put the dried film on an open mill for mixing, and then produce a sheet;

[0042] (6) The finished film is left to stand for 10 hours, and white carbon black, zinc oxide, and antioxidant RD are added to the internal mixer and mixed. When the mixing temperature reaches 115°C, the rubber is discharged. Finally, the cross-linking agent TAIC and sulfur are added on the open mixer. The film is triangularly wrapped 5 times with a roller distance of 1mm. The film thickness is adjusted. The film is rolled 3 times with left and right broaches and then removed. The film is left to stand at room temperature for 24 hours.

[0043] Example 2

[0044] like Figure 1As shown, an elastic anti-extrusion power cable includes a conductor 1, a low-smoke halogen-free polyolefin insulation layer 2 and an aluminum-plastic composite film shielding layer 3 are sequentially coated on the outside of the conductor 1, two conductors 1 are twisted and then coated with a Kevlar fiber braided layer 4 to form a core, four cores are arranged symmetrically, and a steel wire rope 5 is arranged at the center of the four cores and twisted into a cable core, and a flame-retardant tape wrapping layer 6, a TPV elastomer filling layer 7 and a synthetic rubber anti-extrusion ring 8 are sequentially coated on the outside of the cable core, an axial circular hole is opened inside the synthetic rubber anti-extrusion ring 8, a carbon corrugated tube 9 is laid in the circular hole, and a nano-silicone waterproof glue filling layer 10, a glass fiber braided layer 11 and a chloroprene rubber outer sheath 12 are sequentially coated on the outside of the synthetic rubber anti-extrusion ring 8. The nano-silicone waterproof glue filling layer 10 has a particularly good waterproof effect.

[0045] The TPV elastomer filling layer 7 has excellent dynamic fatigue resistance, high tear resistance, excellent weather resistance, good wear resistance, and outstanding corrosion resistance to water-based acid and alkali liquids and polar oils. It is arranged outside the cable core to protect the internal wire core from damage.

[0046] The carbon bellows 9 has a series of advantages such as light weight, small bending radius, high external pressure resistance, low insulation resistance, corrosion resistance, no leakage, rat bite prevention, good weather resistance, high yield, and can be bypassed in the event of obstacles.

[0047] The synthetic rubber anti-extrusion ring 8 can well ensure that the cable can quickly recover to its original shape after being squeezed and deformed, thereby ensuring the normal operation of the power cable, reducing damage and facilitating use.

[0048] The inner and outer sides of the carbon bellows 9 are filled with heat dissipation fillers 15, which can dissipate the heat generated by the conductor, are safe to use, and have good stability. The heat dissipation filler 15 is a heat dissipation filler bar or heat dissipation filler sand or other fillers with heat dissipation effect.

[0049] The gaps inside the cable core and the wire core are filled with flame retardant fillers 13.

[0050] The flame retardant filler 13 is magnesium oxide powder, which has a good flame retardant effect.

[0051] A plurality of arc-shaped wear-resistant and compression-resistant strips 14 are evenly distributed on the outside of the neoprene outer sheath 12. The arc-shaped wear-resistant and compression-resistant strips increase the external wear resistance of the cable, prevent the outer sheath from cracking, and extend the service life.

[0052] The chloroprene rubber outer sheath 12 comprises the following raw materials in parts by weight:

[0053] Chloroprene rubber 130, white carbon black 40, tert-butyldimethylchlorosilane 14, sulfur 3, cross-linking agent TAIC 2, zinc oxide 30, antioxidant RD 4, alkali lignin 30, trifluoroethyl methacrylate 10, methyl methacrylate 14, dibenzoyl peroxide 1, triethylamine 2.

[0054] The method for preparing the chloroprene rubber outer sheath comprises the following steps:

[0055] (1) Take dibenzoyl peroxide, add it to 100 times its weight of dimethylformamide, stir evenly, and obtain an initiator solution;

[0056] (2) Take tert-butyldimethylsilyl chloride, add it to 40 times its weight of dimethylformamide, stir evenly, add alkali lignin, raise the temperature to 60° C., keep stirring for 3 hours, and obtain silane-modified lignin;

[0057] (3) trifluoroethyl methacrylate, methyl methacrylate and triethylamine were mixed and added to anhydrous ethanol 20 times the weight of the mixture, and the mixture was stirred at 75° C. for 3 hours, and the ethanol was removed by rotary evaporation to obtain a modified monomer;

[0058] (4) taking the modified monomer, adding it to the initiator solution, stirring evenly, sending it into a reactor, introducing nitrogen, adjusting the temperature of the reactor to 80° C., adding the above-mentioned silane-modified lignin, stirring and reacting for 5 hours, discharging the material, and removing the solvent by rotary evaporation to obtain a modified material;

[0059] (5) Take the modified material, mix it with chloroprene rubber, put it into an oven, adjust the oven temperature to 120°C, bake it for 120 seconds, take it out, put the dried film on an open mill for mixing, and then produce a sheet;

[0060] (6) The finished film is left to stand for 12 hours, and white carbon black, zinc oxide, and antioxidant RD are added to the internal mixer and mixed. When the mixing temperature reaches 120°C, the rubber is discharged. Finally, the cross-linking agent TAIC and sulfur are added on the open mixer. The film is triangularly wrapped 5 times with a roller distance of 1mm. The film thickness is adjusted. The film is rolled 3 times with left and right pull knives and then removed. The film is left to stand at room temperature for 24 hours.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An elastic anti-extrusion power cable, characterized in that: The invention comprises a conductor, a low-smoke halogen-free polyolefin insulation layer and an aluminum-plastic composite film shielding layer are sequentially coated on the outside of the conductor, two conductors are twisted into a pair and then coated with a Kevlar fiber braided layer to form a wire core, four wire cores are centrally symmetrically arranged, a steel wire rope is arranged at the center of the four wire cores and twisted into a cable core, a flame-retardant tape wrapping layer, a TPV elastomer filling layer and a synthetic rubber anti-extrusion ring are sequentially coated on the outside of the cable core, an axial circular hole is opened inside the synthetic rubber anti-extrusion ring, a carbon corrugated pipe is laid in the circular hole, and a nano-silicone waterproof glue filling layer, a glass fiber braided layer and a chloroprene rubber outer sheath are sequentially coated on the outside of the synthetic rubber anti-extrusion ring; The chloroprene rubber outer sheath comprises the following raw materials in parts by weight: Chloroprene rubber 100-130, white carbon black 30-40, tert-butyldimethylchlorosilane 10-14, sulfur 2-3, cross-linking agent TAIC 1-2, zinc oxide 20-30, antioxidant RD 2-4, alkali lignin 20-30, trifluoroethyl methacrylate 5-10, methyl methacrylate 10-14, dibenzoyl peroxide 0.4-1, triethylamine 1-2; The preparation method of the chloroprene rubber outer sheath comprises the following steps: (1) taking dibenzoyl peroxide, adding it to 80-100 times its weight of dimethylformamide, stirring evenly, to obtain an initiator solution; (2) Take tert-butyldimethylsilyl chloride, add it to 30-40 times of its weight of dimethylformamide, stir evenly, add alkali lignin, increase the temperature to 55-60° C., keep warm and stir for 2-3 hours to obtain silane-modified lignin; (3) Mix trifluoroethyl methacrylate, methyl methacrylate and triethylamine, add to anhydrous ethanol 10-20 times the weight of the mixture, stir at 70-75° C. for 2.6-3 hours, and remove ethanol by rotary evaporation to obtain a modified monomer; (4) taking the modified monomer, adding it to the initiator solution, stirring evenly, sending it into a reactor, introducing nitrogen, adjusting the temperature of the reactor to 70-80° C., adding the above-mentioned silane-modified lignin, stirring and reacting for 4-5 hours, discharging the material, and removing the solvent by rotary evaporation to obtain a modified material; (5) Take the modified material, mix it with chloroprene rubber, put it into an oven, adjust the oven temperature to 110-120°C, bake it for 80-120 seconds, take it out, put the dried film on an open mill for mixing, and then produce a sheet; (6) The finished film is left to stand for 10-12 hours, and white carbon black, zinc oxide, and antioxidant RD are added to the internal mixer for mixing. When the mixing temperature reaches 115-120°C, the rubber is discharged. Finally, the cross-linking agent TAIC and sulfur are added on the open mixer. The film is triangularly wrapped 5 times with a roller distance of 1mm. The film thickness is adjusted. The film is rolled 3 times with left and right broaches and then removed. The film is left to stand at room temperature for 24 hours.

2. The elastic anti-extrusion power cable according to claim 1, characterized in that: The inner side and the outer side of the carbon bellows are filled with heat dissipation fillers.

3. The elastic anti-extrusion power cable according to claim 1, characterized in that: The gaps inside the cable core and the wire core are filled with flame retardant fillers.

4. The elastic anti-extrusion power cable according to claim 3, characterized in that: The flame retardant filler is magnesium oxide powder.

5. The elastic anti-extrusion power cable according to claim 1, characterized in that: A plurality of arc-shaped wear-resistant and pressure-resistant strips are evenly distributed on the outer side of the chloroprene rubber outer sheath.

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