CN114843020A - Wear-resistant flame-retardant cable and preparation method thereof - Google Patents
Wear-resistant flame-retardant cable and preparation method thereof Download PDFInfo
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- CN114843020A CN114843020A CN202210635081.7A CN202210635081A CN114843020A CN 114843020 A CN114843020 A CN 114843020A CN 202210635081 A CN202210635081 A CN 202210635081A CN 114843020 A CN114843020 A CN 114843020A
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 89
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000002360 preparation method Methods 0.000 title abstract description 36
- 230000001681 protective effect Effects 0.000 claims abstract description 55
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000000576 coating method Methods 0.000 claims abstract description 26
- 239000011248 coating agent Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004020 conductor Substances 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 13
- 239000010949 copper Substances 0.000 claims abstract description 13
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 10
- 239000004718 silane crosslinked polyethylene Substances 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 229910052599 brucite Inorganic materials 0.000 claims description 69
- 239000002994 raw material Substances 0.000 claims description 42
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical class [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 38
- 239000000203 mixture Substances 0.000 claims description 27
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 26
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 26
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 26
- 239000011265 semifinished product Substances 0.000 claims description 24
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 19
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 18
- 229920000459 Nitrile rubber Polymers 0.000 claims description 16
- 235000021355 Stearic acid Nutrition 0.000 claims description 16
- 239000006229 carbon black Substances 0.000 claims description 16
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 16
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 16
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 16
- 239000008117 stearic acid Substances 0.000 claims description 16
- OEIWPNWSDYFMIL-UHFFFAOYSA-N dioctyl benzene-1,4-dicarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C=C1 OEIWPNWSDYFMIL-UHFFFAOYSA-N 0.000 claims description 15
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 15
- 239000004800 polyvinyl chloride Substances 0.000 claims description 15
- 238000005299 abrasion Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 239000005995 Aluminium silicate Substances 0.000 claims description 13
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 13
- 235000012211 aluminium silicate Nutrition 0.000 claims description 13
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 13
- 239000003822 epoxy resin Substances 0.000 claims description 13
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 13
- 235000019359 magnesium stearate Nutrition 0.000 claims description 13
- 239000012188 paraffin wax Substances 0.000 claims description 13
- 229920000647 polyepoxide Polymers 0.000 claims description 13
- 239000000047 product Substances 0.000 claims description 13
- 239000003381 stabilizer Substances 0.000 claims description 13
- 239000011787 zinc oxide Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 12
- 229920002545 silicone oil Polymers 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical group CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000012065 filter cake Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- 238000004073 vulcanization Methods 0.000 claims description 3
- 238000003828 vacuum filtration Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000001125 extrusion Methods 0.000 abstract 2
- 238000005253 cladding Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 111
- 238000012360 testing method Methods 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 238000010998 test method Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013022 formulation composition Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of cable preparation, in particular to a wear-resistant flame-retardant cable and a preparation method thereof, wherein the wear-resistant flame-retardant cable comprises a cable core, and a shielding layer, an insulating layer, a flame-retardant layer, an armor layer and a protective sleeve which are coated outside the cable core from inside to outside, the shielding layer is formed by winding and coating a copper strip or a copper wire, the insulating layer is made of silane crosslinked polyethylene, the armor layer is made by coating an aluminum alloy strip, and the preparation method of the wear-resistant flame-retardant cable comprises the following steps: the method comprises the steps of conductor preparation, shielding layer cladding, insulating layer extrusion, flame retardant layer extrusion, armor layer preparation and protective sleeve preparation. Compared with the prior art, the cable protective sleeve has the advantages that the flame retardant effect is improved, the water resistance of the cable is improved, the wear resistance of the cable protective sleeve is improved, the adhesion between the protective sleeve and the inner layer is enhanced, and the falling degree of the cable protective sleeve when the cable protective sleeve is scratched is reduced.
Description
Technical Field
The invention relates to the technical field of cable preparation, in particular to a wear-resistant flame-retardant cable and a preparation method thereof.
Background
Cables are wire products used to transmit electrical (magnetic) energy, information and to perform electromagnetic energy conversion. The cable is an aggregate consisting of: one or more insulated wire cores, and their respective possible coatings, total protective layers and outer jackets, the cable may also have additional conductors without insulation.
In order to enhance the flame-retardant and wear-resistant performance of a common cable, a flame retardant and a wear-resistant agent are usually added into raw materials, however, as the flame retardant, brucite is one of the flame retardants, and is used due to the characteristics of no toxicity, smoke suppression, no secondary harm and the like, but the flame retardant effect is low, as the wear-resistant agent, although the wear resistance of the outer part of the cable can be improved, after the outer skin of the cable is damaged due to friction, the outer skin of the cable is easy to generate larger cracks or fall-off phenomena in a short time, and in addition, when the cable is applied to a water area, the signal transmission of the cable in water is influenced to a certain extent due to the intervention of water. Therefore, a wear-resistant flame-retardant cable and a preparation method thereof are needed to solve the problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a wear-resistant flame-retardant cable and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a wear-resistant flame-retardant cable comprises a cable core, a shielding layer, an insulating layer, a flame-retardant layer, an armor layer and a protective sleeve, wherein the shielding layer, the insulating layer, the flame-retardant layer, the armor layer and the protective sleeve are coated outside the cable core from inside to outside;
the flame-retardant layer comprises the following raw materials in parts by mass: 35-45 parts of modified brucite, 35-45 parts of aluminum hydroxide, 20-30 parts of nitrile rubber, 20-30 parts of chloroprene rubber, 3-12 parts of zinc oxide, 3-5 parts of stearic acid, 3-6 parts of zinc borate and 5-8 parts of carbon black;
the protective sleeve comprises the following raw materials in parts by mass: 75-95 parts of polyvinyl chloride, 16-21 parts of modified silicon carbide, 7-13 parts of chlorinated paraffin, 15-20 parts of dioctyl terephthalate, 7-8 parts of nano calcium carbonate, 7-8 parts of nano kaolin, 2-3 parts of magnesium stearate, 2-4 parts of calcium-zinc stabilizer, 10-20 parts of epoxy resin and 3-15 parts of FSH vulcanizing agent.
Preferably, the preparation method of the modified brucite comprises the following steps:
weighing brucite powder, preheating for 0.5-1h at the temperature of 120-;
slowly pouring the preheated brucite powder into a conical flask, magnetically stirring the inside of the conical flask until the toluene solvent is completely volatilized to obtain a filter cake, and drying the filter cake at the temperature of 100-110 ℃ for 2-3h to obtain the modified brucite.
Preferably, the mass of the silicone oil is 1.0-3.0% of the brucite powder, and the molar concentration of the mixed solution is 0.5-1 mol/L.
Preferably, the mass of the zinc borate is 5% -6% of the total mass of the modified brucite and the aluminum hydroxide.
Preferably, the preparation method of the modified silicon carbide comprises the following steps:
adding toluene, silicon carbide micro powder and a silane coupling agent KH550 into a four-neck flask, introducing nitrogen, heating to 85 ℃ under the airflow of the nitrogen, stirring and reacting for 6-7h, after the reaction is finished, carrying out vacuum filtration on the product while the product is hot, drying in an oven at 105 ℃ for 12-16 h after multiple times of ultrasonic dispersion and centrifugal washing, and cooling for later use.
Preferably, the ultrasonic medium is water, the ultrasonic time is 30-45 minutes, the medium for centrifugal washing is acetone, and the centrifugal washing time is 25-30 minutes.
Preferably, the mass ratio of the dioctyl terephthalate to the polyvinyl chloride is 1: 5.
A preparation method of a wear-resistant flame-retardant cable comprises the following steps:
s1, preparing a conductor: drawing a conductor material, annealing and twisting to obtain a conductor;
s2, coating a shielding layer: winding and coating a copper strip or a copper wire on the outer surface of the conductor obtained in the step S1 to form a shielding layer with the thickness of 0.3-0.5mm, and obtaining a semi-finished product A;
s3, extruding an insulating layer: extruding and wrapping the silane crosslinked polyethylene on the semi-finished product A obtained in the step S2 at the temperature of 170-180 ℃ by a wrapping machine to form an insulating layer with the thickness of 0.2-0.4mm, and cooling to obtain a semi-finished product B;
s4, extruding and wrapping a flame-retardant layer: weighing modified brucite, aluminum hydroxide, nitrile rubber, chloroprene rubber, stearic acid, zinc borate and carbon black, mixing the modified brucite, aluminum hydroxide, nitrile rubber, chloroprene rubber, stearic acid, zinc borate and carbon black into a mixture through an internal mixer, sending the mixture into a vulcanizer, adding zinc oxide for vulcanization to obtain a vulcanized mixture, extruding and coating the vulcanized mixture outside a semi-finished product B through a coating machine to form a flame-retardant layer, and cooling to obtain a semi-finished product C;
s5, preparing an armor layer: wrapping an aluminum alloy belt on the outer surface of the semi-finished product C to form an armor layer with the thickness of 0.3-0.5mm to obtain a semi-finished product D;
s6, preparing a protective sleeve:
step one, mixing polyvinyl chloride, dioctyl terephthalate, magnesium stearate and epoxy resin, feeding the mixture into an internal mixer, heating the internal mixer to 95 ℃, adding a calcium-zinc stabilizer, modified silicon carbide and chlorinated paraffin, carrying out internal mixing for 9-15 minutes, continuously adding nano calcium carbonate and nano kaolin into the internal mixer, and carrying out internal mixing for 18-24 minutes to obtain an internal mixing mixture;
and step two, feeding the banburying mixture into a vulcanizing agent, adding an FSH vulcanizing agent, vulcanizing, feeding the product into a covering machine, extruding and covering the product outside the semi-finished product D to form a protective sleeve, and cooling to obtain the finished cable.
Preferably, the specific process of S1 is as follows: drawing a plurality of copper wires with the diameter of 1.0mm into copper wire single wires with the diameter of 0.3mm, annealing the copper wire single wires under the air pressure of 2.4-2.6MPa, cooling, stranding a plurality of copper wire single wires by using a wire bundling machine, controlling the stranding pitch to be 30-32mm, controlling the strand stranding direction to the left, controlling the diameter of stranded wires to be 5.15 +/-0.05 mm, and preparing six strands of stranded wires into conductive strands to obtain the conductor.
The invention has the beneficial effects that:
1. according to the invention, brucite is used as a flame retardant instead of magnesium hydroxide in the raw material formula of the flame-retardant layer, and is subjected to modification treatment, so that the flame-retardant effect is improved, and the water resistance of the cable can be improved.
2. The modified silicon carbide is doped in the raw material formula of the protective sleeve, so that the wear resistance of the cable protective sleeve can be effectively improved, the cohesiveness between the protective sleeve and the inner layer can be enhanced, and the problem that the outer protective sleeve of the cable is seriously peeled off when being scratched is solved.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
In the following embodiments 1 to 5, a wear-resistant flame-retardant cable includes a cable core, and a shielding layer, an insulating layer, a flame-retardant layer, an armor layer and a protective sheath which are coated outside the cable core from inside to outside, wherein the materials and the preparation processes of the shielding layer, the insulating layer and the armor layer are the same, the shielding layer is formed by winding and coating a copper strip or a copper wire, the insulating layer is made of silane crosslinked polyethylene, the armor layer is made by coating an aluminum alloy strip, and the difference lies in the formula composition and the preparation process of the flame-retardant layer and the protective sheath, which are specifically as follows:
example 1:
the flame-retardant layer comprises the following raw materials in parts by mass: 35 parts of modified brucite, 35 parts of aluminum hydroxide, 20 parts of nitrile rubber, 20 parts of chloroprene rubber, 3 parts of zinc oxide, 3 parts of stearic acid, 3.5 parts of zinc borate and 5 parts of carbon black;
the protective sleeve comprises the following raw materials in parts by mass: 75 parts of polyvinyl chloride, 16 parts of modified silicon carbide, 7 parts of chlorinated paraffin, 15 parts of dioctyl terephthalate, 7 parts of nano calcium carbonate, 7 parts of nano kaolin, 2 parts of magnesium stearate, 2 parts of calcium-zinc stabilizer, 10 parts of epoxy resin and 3 parts of FSH vulcanizing agent.
Example 2:
the flame-retardant layer comprises the following raw materials in parts by mass: 40 parts of modified brucite, 40 parts of aluminum hydroxide, 25 parts of nitrile rubber, 25 parts of chloroprene rubber, 7.5 parts of zinc oxide, 4 parts of stearic acid, 4 parts of zinc borate and 6.5 parts of carbon black;
the protective sleeve comprises the following raw materials in parts by mass: 80 parts of polyvinyl chloride, 19.5 parts of modified silicon carbide, 10 parts of chlorinated paraffin, 16 parts of dioctyl terephthalate, 7.5 parts of nano calcium carbonate, 7.5 parts of nano kaolin, 2.5 parts of magnesium stearate, 3 parts of calcium-zinc stabilizer, 15 parts of epoxy resin and 9 parts of FSH vulcanizing agent.
Example 3:
the flame-retardant layer comprises the following raw materials in parts by mass: 45 parts of modified brucite, 45 parts of aluminum hydroxide, 30 parts of nitrile rubber, 30 parts of chloroprene rubber, 12 parts of zinc oxide, 5 parts of stearic acid, 4.5 parts of zinc borate and 8 parts of carbon black;
the protective sleeve comprises the following raw materials in parts by mass: 95 parts of polyvinyl chloride, 21 parts of modified silicon carbide, 13 parts of chlorinated paraffin, 19 parts of dioctyl terephthalate, 8 parts of nano calcium carbonate, 8 parts of nano kaolin, 3 parts of magnesium stearate, 4 parts of calcium-zinc stabilizer, 20 parts of epoxy resin and 15 parts of FSH vulcanizing agent.
In examples 1 to 3, the amount of silicone oil in the modified brucite was 1.0% by mass of the brucite powder.
Example 4:
the flame-retardant layer comprises the following raw materials in parts by mass: 35 parts of modified brucite, 35 parts of aluminum hydroxide, 20 parts of nitrile rubber, 20 parts of chloroprene rubber, 3 parts of zinc oxide, 3 parts of stearic acid, 3.5 parts of zinc borate and 5 parts of carbon black;
the protective sleeve comprises the following raw materials in parts by mass: 75 parts of polyvinyl chloride, 16 parts of modified silicon carbide, 7 parts of chlorinated paraffin, 15 parts of dioctyl terephthalate, 7 parts of nano calcium carbonate, 7 parts of nano kaolin, 2 parts of magnesium stearate, 2 parts of calcium-zinc stabilizer, 10 parts of epoxy resin and 3 parts of FSH vulcanizing agent.
In example 4 above, the mass of the silicone oil in the modified brucite was 2.0% of the mass of the brucite powder.
Example 5:
the flame-retardant layer comprises the following raw materials in parts by mass: 35 parts of modified brucite, 35 parts of aluminum hydroxide, 20 parts of nitrile rubber, 20 parts of chloroprene rubber, 3 parts of zinc oxide, 3 parts of stearic acid, 3.5 parts of zinc borate and 5 parts of carbon black;
the protective sleeve comprises the following raw materials in parts by mass: 75 parts of polyvinyl chloride, 16 parts of modified silicon carbide, 7 parts of chlorinated paraffin, 15 parts of dioctyl terephthalate, 7 parts of nano calcium carbonate, 7 parts of nano kaolin, 2 parts of magnesium stearate, 2 parts of calcium-zinc stabilizer, 10 parts of epoxy resin and 3 parts of FSH vulcanizing agent.
In example 5 above, the mass of the silicone oil in the modified brucite was 3.0% of the mass of the brucite powder.
In examples 1-5 above:
the preparation method of the modified brucite with the single substance weight portion comprises the following steps:
weighing 50g of brucite powder, preheating the brucite powder in a drying oven at 120 ℃ for 0.5h, weighing silicon oil, dripping the silicon oil into a conical flask, pouring a proper amount of toluene into the conical flask, preheating the toluene to 60 ℃, and starting magnetic stirring to fully dissolve the silicon oil into the toluene to form a mixed solution with the molar concentration of 0.5 mol/L;
slowly pouring the preheated brucite powder into a conical flask, magnetically stirring the inside of the conical flask at the rotating speed of 500 r/min until the toluene solvent is volatilized completely to obtain a filter cake, and drying the filter cake at 110 ℃ for 2h to obtain the modified brucite.
② the preparation method of the modified silicon carbide with single mass part is as follows:
350mL of toluene, 50g of silicon carbide micro powder and a silane coupling agent KH550 in a corresponding proportion are added into a four-neck flask, nitrogen is introduced, the temperature is raised to 85 ℃ under the flow of nitrogen, and the mixture is stirred and reacts for 6 hours. After the reaction is finished, the product is filtered in vacuum when the product is hot, and is dried for 12 hours in a 100 ℃ oven after being subjected to ultrasonic dispersion for multiple times (the ultrasonic medium is water and the time is 30min) and centrifugal washing (the medium is acetone and the time is 25min), and is cooled for later use.
The preparation method of the abrasion-resistant flame-retardant cable in the above embodiments 1 to 5 is as follows:
s1, preparing a conductor: drawing a plurality of copper wires with the diameter of 1.0mm into copper wire single wires with the diameter of 0.3mm, annealing the copper wire single wires under the air pressure of 2.4MPa, cooling, stranding a plurality of copper wire single wires by using a wire bundling machine, controlling the stranding pitch to be 30mm, controlling the strand stranding direction to be leftward, controlling the strand stranding diameter to be 5.10mm, and manufacturing six strands into conductive strands to obtain the conductor;
s2, coating a shielding layer: winding and coating a copper strip or a copper wire on the outer surface of the conductor obtained in the step S1 to form a shielding layer with the thickness of 0.3mm, and thus obtaining a semi-finished product A;
s3, extruding an insulating layer: extruding silane crosslinked polyethylene on the semi-finished product A obtained in S2 at the temperature of 170 ℃ by using a coating machine to form an insulating layer with the thickness of 0.2mm, and cooling to obtain a semi-finished product B;
s4, extruding and wrapping the flame-retardant layer: weighing modified brucite, aluminum hydroxide, nitrile rubber, chloroprene rubber, stearic acid, zinc borate and carbon black, mixing the modified brucite, aluminum hydroxide, nitrile rubber, chloroprene rubber, stearic acid, zinc borate and carbon black into a mixture through an internal mixer, sending the mixture into a vulcanizer, adding zinc oxide for vulcanization to obtain a vulcanized mixture, extruding and coating the vulcanized mixture outside a semi-finished product B through a coating machine to form a flame-retardant layer, and cooling to obtain a semi-finished product C;
s5, preparing an armor layer: wrapping an aluminum alloy belt on the outer surface of the semi-finished product C to form an armor layer with the thickness of 0.5mm to obtain a semi-finished product D;
s6, preparing a protective sleeve:
step one, mixing polyvinyl chloride, dioctyl terephthalate, magnesium stearate and epoxy resin, feeding the mixture into an internal mixer, heating the internal mixer to 95 ℃, adding a calcium-zinc stabilizer, modified silicon carbide and chlorinated paraffin, internally mixing for 10 minutes, continuously adding nano calcium carbonate and nano kaolin into the internal mixer, and continuously internally mixing for 20 minutes to obtain an internally mixed mixture;
and step two, feeding the banburying mixture into a vulcanizing agent, adding an FSH vulcanizing agent, vulcanizing, feeding the product into a covering machine, extruding and covering the product outside the semi-finished product D to form a protective sleeve, and cooling to obtain the finished cable.
Test I, determination of abrasion resistance of cable outer sheath
In the following comparative examples 1-3, a wear-resistant flame-retardant cable comprises a cable core, and a shielding layer, an insulating layer, a flame-retardant layer, an armor layer and a protective sleeve which are coated outside the cable core from inside to outside, wherein the materials and the preparation processes of the shielding layer, the insulating layer and the armor layer are the same, the shielding layer is formed by winding and coating a copper strip or a copper wire, the insulating layer is made of silane crosslinked polyethylene, the armor layer is made by coating an aluminum alloy strip, and the difference lies in the formula composition and the preparation process of the flame-retardant layer and the protective sleeve, which are specifically as follows:
comparative example 1: compared with example 1, the difference is that the 'modified silicon carbide' in the raw material of the protective sleeve is changed into unmodified 'silicon carbide';
comparative example 2: compared with example 2, the difference is that the 'modified silicon carbide' in the raw material of the protective sleeve is changed into unmodified 'silicon carbide';
comparative example 3: compared with example 3, the difference is that the 'modified silicon carbide' in the raw material of the protective sleeve is changed into unmodified 'silicon carbide';
the abrasion-resistant flame-retardant cable of comparative examples 1 to 3 was prepared in comparison with the preparation methods of examples 1 to 3, except that the "modified silicon carbide" in the step of S6 was changed to unmodified "silicon carbide".
In the following reference examples 1-3, a wear-resistant flame-retardant cable comprises a cable core, and a shielding layer, an insulating layer, a flame-retardant layer, an armor layer and a protective sleeve which are coated outside the cable core from inside to outside, wherein the materials and the preparation processes of the shielding layer, the insulating layer and the armor layer are the same, the shielding layer is formed by winding and coating a copper strip or a copper wire, the insulating layer is made of silane crosslinked polyethylene, the armor layer is made by coating an aluminum alloy strip, and the difference lies in the formula composition and the preparation process of the flame-retardant layer and the protective sleeve, which specifically comprises the following steps:
reference example 1: compared with the example 1, the difference is that the raw material of the protective sleeve does not contain the modified silicon carbide;
reference example 2: compared with the example 2, the difference is that the raw material of the protective sleeve does not contain the modified silicon carbide;
reference example 3: compared with example 3, the difference is that the raw material of the protective sleeve does not contain modified silicon carbide;
compared with the preparation methods of the embodiments 1 to 3, the preparation method of the abrasion-resistant flame-retardant cable in the reference embodiments 1 to 3 is different in that the modified silicon carbide is not added in the step S6.
Test subjects: cables of examples 1 to 3, comparative examples 1 to 3 and reference examples 1 to 3;
the test method comprises the following steps:
testing the cable according to the requirements and the method for testing the abrasion resistance of vulcanized rubber (using an Akron abrasion tester) in GB/T1689-;
and (3) test results:
from the test results in the table above, it can be seen that:
in each test group, the average wear volume of the examples was 2cm 3 About, the average wear volume of the comparative example is 4.2-4.6cm 3 The average wear volume of the reference examples was > 5.7cm 3 ；
Therefore, the wear-resisting property of the cable in the embodiment is optimal, that is, under the condition that the formulas of other raw materials are the same, a proper amount of silicon carbide is added into the protective sleeve and is subjected to modification treatment, so that the wear-resisting property of the outer sheath of the cable can be remarkably improved.
Test II, determination of anti-falling degree of cable outer sheath
Test subjects: cables of examples 1 to 3, comparative examples 1 to 3 and reference examples 1 to 3;
the test method comprises the following steps:
the determination is carried out according to a method of ASTM D3359-2002 adhesive force determination by a tape method, and the integral falling degree of the cable under the condition that the outer sheath is scratched is penetrated and recorded;
the standard ratings specified above and specifications are as follows:
and (3) test results:
from the test results in the table above, it can be seen that:
in each test group, the comparative example and the reference example are different in that the silicon carbide in the comparative example is not modified, and the reference example does not contain any silicon carbide or modified substances thereof, but tests show that the outer sheath of the cable produced by the comparative example and the reference example is seriously peeled when the outer sheath is scratched;
in the embodiment, the added silicon carbide is modified, and tests show that when the outer sheath of the produced cable is scratched, the outer sheath is less prone to fall off and is higher than the comparative example and the reference example by one grade;
therefore, under the condition that the formulas of other raw materials are the same, a proper amount of silicon carbide is added into the protective sleeve and is subjected to modification treatment, so that the anti-falling performance of the cable outer sheath can be remarkably improved.
By combining the data and results of the first test and the second test, it can be known that the wear resistance of the cable protective sleeve can be effectively improved by doping the modified silicon carbide in the raw material formula of the protective sleeve, and the falling-off condition of the cable protective sleeve when the cable protective sleeve is scratched can be reduced.
Test three, measurement of flame retardancy of Cable
In the following comparative examples 4-6, a wear-resistant flame-retardant cable comprises a cable core, and a shielding layer, an insulating layer, a flame-retardant layer, an armor layer and a protective sleeve which are coated outside the cable core from inside to outside, wherein the materials and the preparation processes of the shielding layer, the insulating layer and the armor layer are the same, the shielding layer is formed by winding and coating a copper strip or a copper wire, the insulating layer is made of silane crosslinked polyethylene, the armor layer is made by coating an aluminum alloy strip, and the difference lies in the formula composition and the preparation process of the flame-retardant layer and the protective sleeve, which are specifically as follows:
comparative example 4: compared with example 1, the difference is that the modified brucite in the raw material of the flame-retardant layer is changed into unmodified brucite;
comparative example 5: compared with example 2, the difference is that the modified brucite in the raw material of the flame-retardant layer is changed into unmodified brucite;
comparative example 6: compared with example 3, the difference is that the modified brucite in the raw material of the flame-retardant layer is changed into unmodified brucite;
the abrasion-resistant flame-retardant cable of comparative examples 4 to 6 was prepared in comparison with the preparation methods of examples 1 to 3, except that the "modified brucite" in the step of S4 was changed to unmodified "brucite".
In the following reference examples 4-6, a wear-resistant flame-retardant cable comprises a cable core, and a shielding layer, an insulating layer, a flame-retardant layer, an armor layer and a protective jacket which are coated outside the cable core from inside to outside, wherein the materials and the preparation processes of the shielding layer, the insulating layer and the armor layer are the same, the shielding layer is formed by winding and coating a copper strip or a copper wire, the insulating layer is made of silane crosslinked polyethylene, and the armor layer is coated by an aluminum alloy strip, and the difference lies in the formula composition and the preparation process of the flame-retardant layer and the protective jacket, which are specifically as follows:
reference example 4: compared with the example 1, the difference is that the raw material of the flame-retardant layer does not contain the modified brucite;
reference example 5: compared with the example 2, the difference is that the raw material of the flame-retardant layer does not contain the modified brucite;
reference example 6: compared with example 3, the difference is that the raw material of the flame-retardant layer does not contain the modified brucite;
the preparation method of the abrasion-resistant flame-retardant cable in the above reference examples 4 to 6 is different from the preparation methods of the examples 1 to 3 in that the "modified brucite" is not added in the step of S4.
Test subjects: cables of examples 1 to 3, comparative examples 4 to 6 and reference examples 4 to 6;
the test method comprises the following steps:
the limiting oxygen index LOI (%) of the cable is detected according to the method described in GB/T2406-2009, and the result is shown in the following table;
wherein, LOI low represents that the material is easy to burn, generally, the oxygen index is less than 22 percent and belongs to flammable materials, the oxygen index is between 22 percent and 27 percent and belongs to flame-retardant materials, and the oxygen index is more than 27 percent;
and (3) test results:
from the test results in the table above, it can be seen that:
in each test group, the limited oxygen indexes of the cables in the examples, the comparative examples and the reference examples are more than 27%, and the cables have good flame retardant effect, and compared with the cables in the comparative examples, the flame retardant effect of the cables in the comparative examples is better than that of the cables in the reference examples;
therefore, under the condition that the formulas of other raw materials are the same, the flame retardant effect of the whole cable can be improved by adding a proper amount of brucite into the flame retardant layer, and the flame retardant effect can be further improved by adding a proper amount of modified brucite.
Test four, determination of Water resistance of Cable
In the following embodiments 6 to 9, a wear-resistant flame-retardant cable includes a cable core, and a shielding layer, an insulating layer, a flame-retardant layer, an armor layer, and a protective sheath that are coated outside the cable core from inside to outside, where the materials and the preparation processes of the shielding layer, the insulating layer, and the armor layer are all the same, the shielding layer is formed by winding and coating a copper strip or a copper wire, the insulating layer is made of silane crosslinked polyethylene, and the armor layer is made of an aluminum alloy strip, where the difference lies in the formulation composition and the preparation process of the flame-retardant layer and the protective sheath, specifically as follows:
example 6:
the flame-retardant layer comprises the following raw materials in parts by mass: 35 parts of modified brucite, 35 parts of aluminum hydroxide, 20 parts of nitrile rubber, 20 parts of chloroprene rubber, 3 parts of zinc oxide, 3 parts of stearic acid, 3.5 parts of zinc borate and 5 parts of carbon black;
the protective sleeve comprises the following raw materials in parts by mass: 75 parts of polyvinyl chloride, 16 parts of modified silicon carbide, 7 parts of chlorinated paraffin, 15 parts of dioctyl terephthalate, 7 parts of nano calcium carbonate, 7 parts of nano kaolin, 2 parts of magnesium stearate, 2 parts of calcium-zinc stabilizer, 10 parts of epoxy resin and 3 parts of FSH vulcanizing agent.
In example 6 above, the mass of the silicone oil in the modified brucite was 3.5% of the mass of the brucite powder.
Example 7:
the flame-retardant layer comprises the following raw materials in parts by mass: 35 parts of modified brucite, 35 parts of aluminum hydroxide, 20 parts of nitrile rubber, 20 parts of chloroprene rubber, 3 parts of zinc oxide, 3 parts of stearic acid, 3.5 parts of zinc borate and 5 parts of carbon black;
the protective sleeve comprises the following raw materials in parts by mass: 75 parts of polyvinyl chloride, 16 parts of modified silicon carbide, 7 parts of chlorinated paraffin, 15 parts of dioctyl terephthalate, 7 parts of nano calcium carbonate, 7 parts of nano kaolin, 2 parts of magnesium stearate, 2 parts of calcium-zinc stabilizer, 10 parts of epoxy resin and 3 parts of FSH vulcanizing agent.
In example 7 above, the mass of the silicone oil in the modified brucite was 4.0% of the mass of the brucite powder.
Example 8:
the flame-retardant layer comprises the following raw materials in parts by mass: 35 parts of modified brucite, 35 parts of aluminum hydroxide, 20 parts of nitrile rubber, 20 parts of chloroprene rubber, 3 parts of zinc oxide, 3 parts of stearic acid, 3.5 parts of zinc borate and 5 parts of carbon black;
the protective sleeve comprises the following raw materials in parts by mass: 75 parts of polyvinyl chloride, 16 parts of modified silicon carbide, 7 parts of chlorinated paraffin, 15 parts of dioctyl terephthalate, 7 parts of nano calcium carbonate, 7 parts of nano kaolin, 2 parts of magnesium stearate, 2 parts of calcium-zinc stabilizer, 10 parts of epoxy resin and 3 parts of FSH vulcanizing agent.
In example 8 above, the mass of the silicone oil in the modified brucite was 5.0% of the mass of the brucite powder.
Test subjects: cables of examples 1 to 8, comparative examples 4 to 6 and reference examples 4 to 6;
the test method comprises the following steps:
the cable was placed in 50m deep water (water pressure 9.8X 10) 5 Pa), then detecting the transmission rate error delta of the cable signal by using a cable transmission tester, and obtaining the result shown in the following table;
wherein,
and (3) test results:
from the test results in the table above, it can be seen that:
(1) in tests 1 to 3, the cable in the embodiment has the best water resistance, and the difference between the water resistance of the cable in the comparative example and the water resistance of the cable in the reference example is not much, that is, under the condition that the formulas of other raw materials are the same, the proper amount of brucite added into the flame-retardant layer can not achieve a good water resistance effect, and after the brucite is modified, the cable can have good water resistance, so that the influence of signal transmission of the cable in water is reduced;
(2) the data results of comparative examples 1 to 8 show that in examples 1 to 5, the mass of the silicone oil in the modified brucite is 1.0 to 3.0 percent of the mass of the brucite powder, and the water-resistant effect of the produced cable is better, while in examples 6 to 8, the water-resistant performance of the cable is gradually weakened along with the increase of the content of the silicone oil in the modified brucite;
therefore, under the condition that the formulas of other raw materials are the same, the water resistance of the cable can be effectively improved by adding a proper amount of modified brucite into the flame-retardant layer, however, when the content of silicone oil used as a material in the modified brucite is increased, the water resistance of the cable is gradually reduced.
By combining the data and results of the third test and the fourth test, it can be known that the flame retardant property of the cable can be effectively improved and the water resistance of the cable can be effectively improved by doping the modified brucite into the raw material formula of the flame retardant layer.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A wear-resistant flame-retardant cable comprises a cable core, a shielding layer, an insulating layer, a flame-retardant layer, an armor layer and a protective sleeve, wherein the shielding layer, the insulating layer, the flame-retardant layer, the armor layer and the protective sleeve are coated outside the cable core from inside to outside;
the flame-retardant layer comprises the following raw materials in parts by mass: 35-45 parts of modified brucite, 35-45 parts of aluminum hydroxide, 20-30 parts of nitrile rubber, 20-30 parts of chloroprene rubber, 3-12 parts of zinc oxide, 3-5 parts of stearic acid, 3-6 parts of zinc borate and 5-8 parts of carbon black;
the protective sleeve comprises the following raw materials in parts by mass: 75-95 parts of polyvinyl chloride, 16-21 parts of modified silicon carbide, 7-13 parts of chlorinated paraffin, 15-20 parts of dioctyl terephthalate, 7-8 parts of nano calcium carbonate, 7-8 parts of nano kaolin, 2-3 parts of magnesium stearate, 2-4 parts of calcium-zinc stabilizer, 10-20 parts of epoxy resin and 3-15 parts of FSH vulcanizing agent.
2. The abrasion-resistant flame-retardant cable according to claim 1, wherein the modified brucite is prepared by the following steps:
weighing brucite powder, preheating for 0.5-1h at the temperature of 120-;
slowly pouring the preheated brucite powder into a conical flask, magnetically stirring the inside of the conical flask until the toluene solvent is completely volatilized to obtain a filter cake, and drying the filter cake at the temperature of 100-110 ℃ for 2-3h to obtain the modified brucite.
3. The abrasion-resistant flame-retardant cable according to claim 2, wherein the silicone oil is 1.0-3.0% by mass of the brucite powder, and the molar concentration of the mixed solution is 0.5-1 mol/L.
4. The abrasion-resistant flame-retardant cable according to claim 1, wherein the mass of the zinc borate is 5-6% of the total mass of the modified brucite and the aluminum hydroxide.
5. The abrasion-resistant flame-retardant cable according to claim 1, wherein the modified silicon carbide is prepared by the following steps:
adding toluene, silicon carbide micro powder and a silane coupling agent KH550 into a four-neck flask, introducing nitrogen, heating to 85 ℃ under the airflow of the nitrogen, stirring and reacting for 6-7h, after the reaction is finished, carrying out vacuum filtration on the product while the product is hot, drying in an oven at 105 ℃ for 12-16 h after multiple times of ultrasonic dispersion and centrifugal washing, and cooling for later use.
6. The abrasion-resistant flame-retardant cable according to claim 5, wherein the ultrasonic medium is water, the ultrasonic time is 30-45 minutes, the centrifugally washed medium is acetone, and the centrifugally washed time is 25-30 minutes.
7. A wear-resistant flame-retardant cable according to claim 1, wherein the mass ratio of dioctyl terephthalate to polyvinyl chloride is 1: 5.
8. The method for preparing a wear-resistant flame-retardant cable according to any one of claims 1 to 7, comprising the steps of:
s1, preparing a conductor: drawing a conductor material, annealing and twisting to obtain a conductor;
s2, coating a shielding layer: winding and coating a copper strip or a copper wire on the outer surface of the conductor obtained in the step S1 to form a shielding layer with the thickness of 0.3-0.5mm, and obtaining a semi-finished product A;
s3, extruding an insulating layer: extruding and wrapping the silane crosslinked polyethylene on the semi-finished product A obtained in the step S2 at the temperature of 170-180 ℃ by a wrapping machine to form an insulating layer with the thickness of 0.2-0.4mm, and cooling to obtain a semi-finished product B;
s4, extruding and wrapping a flame-retardant layer: weighing modified brucite, aluminum hydroxide, nitrile rubber, chloroprene rubber, stearic acid, zinc borate and carbon black, mixing the modified brucite, aluminum hydroxide, nitrile rubber, chloroprene rubber, stearic acid, zinc borate and carbon black into a mixture through an internal mixer, sending the mixture into a vulcanizer, adding zinc oxide for vulcanization to obtain a vulcanized mixture, extruding and coating the vulcanized mixture outside a semi-finished product B through a coating machine to form a flame-retardant layer, and cooling to obtain a semi-finished product C;
s5, preparing an armor layer: wrapping an aluminum alloy belt on the outer surface of the semi-finished product C to form an armor layer with the thickness of 0.3-0.5mm to obtain a semi-finished product D;
s6, preparing a protective sleeve:
step one, mixing polyvinyl chloride, dioctyl terephthalate, magnesium stearate and epoxy resin, feeding the mixture into an internal mixer, heating the internal mixer to 95 ℃, adding a calcium-zinc stabilizer, modified silicon carbide and chlorinated paraffin, carrying out internal mixing for 9-15 minutes, continuously adding nano calcium carbonate and nano kaolin into the internal mixer, and carrying out internal mixing for 18-24 minutes to obtain an internal mixing mixture;
and step two, feeding the banburying mixture into a vulcanizing agent, adding an FSH vulcanizing agent, vulcanizing, feeding the product into a covering machine, extruding and covering the product outside the semi-finished product D to form a protective sleeve, and cooling to obtain the finished cable.
9. The method for preparing the abrasion-resistant flame-retardant cable according to claim 8, wherein the specific process of S1 is as follows: drawing a plurality of copper wires with the diameter of 1.0mm into copper wire single wires with the diameter of 0.3mm, annealing the copper wire single wires under the air pressure of 2.4-2.6MPa, cooling, stranding a plurality of copper wire single wires by using a wire bundling machine, controlling the stranding pitch to be 30-32mm, controlling the strand stranding direction to the left, controlling the diameter of stranded wires to be 5.15 +/-0.05 mm, and preparing six strands of stranded wires into conductive strands to obtain the conductor.
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