CN114446534A - Power cable for engineering construction and preparation method thereof - Google Patents
Power cable for engineering construction and preparation method thereof Download PDFInfo
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- CN114446534A CN114446534A CN202210142802.0A CN202210142802A CN114446534A CN 114446534 A CN114446534 A CN 114446534A CN 202210142802 A CN202210142802 A CN 202210142802A CN 114446534 A CN114446534 A CN 114446534A
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- 238000002360 preparation method Methods 0.000 title abstract description 17
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010445 mica Substances 0.000 claims abstract description 17
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 32
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 31
- 229910052698 phosphorus Inorganic materials 0.000 claims description 31
- 239000011574 phosphorus Substances 0.000 claims description 31
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 30
- 229920002943 EPDM rubber Polymers 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 22
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- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 16
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 15
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 14
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 14
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 claims description 14
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 14
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 14
- 239000003963 antioxidant agent Substances 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 10
- HIVGXUNKSAJJDN-UHFFFAOYSA-N [Si].[P] Chemical compound [Si].[P] HIVGXUNKSAJJDN-UHFFFAOYSA-N 0.000 claims description 10
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 10
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 10
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 10
- 239000000347 magnesium hydroxide Substances 0.000 claims description 10
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 9
- 150000001412 amines Chemical class 0.000 claims description 9
- 239000006229 carbon black Substances 0.000 claims description 9
- 229910021485 fumed silica Inorganic materials 0.000 claims description 9
- 239000004611 light stabiliser Substances 0.000 claims description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 9
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 9
- 239000008117 stearic acid Substances 0.000 claims description 9
- 238000004821 distillation Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 8
- 238000000967 suction filtration Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- TXFOLHZMICYNRM-UHFFFAOYSA-N dichlorophosphoryloxybenzene Chemical compound ClP(Cl)(=O)OC1=CC=CC=C1 TXFOLHZMICYNRM-UHFFFAOYSA-N 0.000 claims description 7
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000004800 polyvinyl chloride Substances 0.000 claims description 7
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 6
- 239000008096 xylene Substances 0.000 claims description 6
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- UQEAIHBTYFGYIE-UHFFFAOYSA-N hexamethyldisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)C UQEAIHBTYFGYIE-UHFFFAOYSA-N 0.000 claims description 5
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 5
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 5
- 239000004005 microsphere Substances 0.000 claims description 5
- 239000012046 mixed solvent Substances 0.000 claims description 5
- 239000012188 paraffin wax Substances 0.000 claims description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 5
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 2
- 238000011097 chromatography purification Methods 0.000 claims description 2
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- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 230000004224 protection Effects 0.000 abstract description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 12
- 239000000203 mixture Substances 0.000 description 11
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Images
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
- 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
- H01B13/245—Sheathing; Armouring; Screening; Applying other protective layers by extrusion of metal layers
-
- 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
-
- 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
- H01B7/2806—Protection against damage caused by corrosion
-
- 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
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/024—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of braided metal wire
-
- 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)
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention relates to the technical field of wires and cables, in particular to a power cable for engineering buildings and a preparation method thereof, wherein the power cable comprises a cable core, an insulating layer, a shielding layer, a steel tape armor layer, a mica paper tape heat-insulating layer and an outer sheath layer; the cable core comprises a plurality of hinged wires and an inner sheath layer coated on the surfaces of the wires; the outer sheath layer comprises the following components: the outer sheath layer material prepared by the invention has good mechanical property, can play a good protection role, and has high limit oxygen index and excellent flame retardant property.
Description
Technical Field
The invention relates to the technical field of wires and cables, in particular to a power cable for engineering construction and a preparation method thereof.
Background
In the construction of the building engineering, the electrical engineering is a very critical content, the comprehensive performance of the building engineering can be effectively improved, and the normal operation of the power cable can ensure the safety and stability of the building engineering.
At present, most of power cables used in building engineering are polyvinyl chloride insulated power cables, and although polyvinyl chloride insulated power cables have certain flame retardance compared with common cables, once they reach a melting point and start to burn, a large amount of black smoke is generated, which causes great obstruction to people evacuation in buildings, and not only does this cause a large amount of toxic and harmful gases to come along with the generation of black smoke, but also the severe toxicity and corrosivity of the gases are main causes of death of people in building fires, and in addition, the strong corrosivity of the harmful gases can corrode the sheaths of other cables, so that a chain reaction is caused, a larger-scale fire is induced, and a secondary disaster is caused, so that providing a power cable with higher flame retardance becomes an urgent task at present.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the technical problem, the invention provides a power cable for engineering construction and a preparation method thereof.
The adopted technical scheme is as follows:
a power cable for engineering construction comprises a cable core, an insulating layer, a shielding layer, a steel tape armor layer, a mica paper tape heat-insulating layer and an outer sheath layer;
the cable core comprises a plurality of hinged wires and an inner sheath layer coated on the surfaces of the wires;
the outer sheath layer comprises the following components:
acrylate rubber, OV-POSS modified ethylene propylene diene monomer, ethylene-vinyl acetate copolymer, carbon black, nano fumed silica, dicumyl peroxide, magnesium hydroxide, aluminum hydroxide, phosphorus-containing organosilicon flame retardant, stearic acid, maleic anhydride grafted polypropylene, hindered amine light stabilizer and antioxidant 1010.
Further, the outer sheath layer comprises the following components in parts by weight:
30-35 parts of acrylate rubber, 5-10 parts of OV-POSS modified ethylene propylene diene monomer, 10-15 parts of ethylene-vinyl acetate copolymer, 4-6 parts of carbon black, 5-10 parts of nano fumed silica, 0.1-0.5 part of dicumyl peroxide, 20-25 parts of magnesium hydroxide, 20-25 parts of aluminum hydroxide, 4-8 parts of phosphorus-containing organic silicon flame retardant, 0.1-0.5 part of stearic acid, 0.1-0.5 part of maleic anhydride grafted polypropylene, 0.1-0.5 part of hindered amine light stabilizer and 10100.1-0.5 part of antioxidant.
Further, the preparation method of the OV-POSS modified ethylene propylene diene monomer rubber comprises the following steps:
s1: adding vinyltrimethoxysilane into an absolute ethyl alcohol/water mixed solvent, uniformly stirring, adding hydrochloric acid to adjust the pH of the system to 2-3, heating to 55-60 ℃, reacting for 45-50h, recovering the room temperature, carrying out suction filtration, and drying the obtained solid to obtain OV-POSS;
s2: and adding the ethylene propylene diene monomer and the OV-POSS into a torque rheometer, mixing for 5-10min at the temperature of 80-90 ℃, adding dicumyl peroxide into the torque rheometer, mixing for 10-20min, heating the torque rheometer to the temperature of 160-170 ℃, continuing mixing for 10-20min, and stopping discharging.
Further, the mass ratio of the ethylene propylene diene monomer, the OV-POSS and the dicumyl peroxide is 1000-1200: 70-100: 1.
further, the preparation method of the phosphorus-containing organic silicon flame retardant comprises the following steps:
s1: adding triethylamine and resorcinol into xylene, stirring and heating to 100-120 ℃, dropwise adding phenyl dichlorophosphate, reacting for 10-15h under the condition of heat preservation after dropwise adding is finished, removing the xylene through reduced pressure distillation, and performing chromatographic purification on the obtained solid column to obtain a phosphorus-containing intermediate;
s2: adding triethylamine and a phosphorus-containing intermediate into dioxane, dropwise adding dimethyldichlorosilane while stirring, heating to 80-100 ℃ after dropwise adding, and reacting for 20-25h under the condition of heat preservation to obtain a silicon-phosphorus-containing intermediate;
s3: adding the silicon-phosphorus-containing intermediate and water into dioxane, heating to 80-90 ℃, stirring for reacting for 10-15h, adding hexamethyldisiloxane for end capping, carrying out reduced pressure distillation to remove dioxane, washing the obtained solid with water and tetrahydrofuran in sequence, and finally carrying out vacuum drying.
Further, the mol ratio of resorcinol to phenyl dichlorophosphate in the S1 is 2-2.1: 1;
the molar ratio of the phosphorus-containing intermediate to the dimethyldichlorosilane in S2 is 1: 1-1.1.
Furthermore, the shielding layer is a double-layer structure formed by uniformly arranging a plurality of strands of copper wires and lead layers.
Further, the insulating layer comprises the following components in parts by weight:
30-40 parts of linear low-density polyethylene, 10-20 parts of ethylene-vinyl acetate copolymer, 10-20 parts of vinylidene fluoride and chlorotrifluoroethylene copolymer, 20-25 parts of hollow ceramic microspheres, 0.5-1 part of dibutyl phthalate, 0.1-0.5 part of maleic anhydride grafted polypropylene, 1-2 parts of microcrystalline paraffin and 10100.1-0.2 part of antioxidant.
Further, the inner sheath layer is any one of polyethylene, polyvinyl chloride, chlorosulfonated polyethylene and polytetrafluoroethylene.
The invention also discloses a preparation method of the power cable for engineering construction, which comprises the following steps:
adopt crowded package technology at a plurality of wire external forming inner sheath layers that evenly set up, obtain the cable core, adopt crowded package technology at a plurality of cable core external forming insulating layers, adopt crowded package technology again and be in insulating layer external forming shielding layer adopts crowded package technology to be in the shielding layer external forming steel band armor, adopt again around the package technology and be in steel band armor outside shaping mica paper tape insulating layer, adopt crowded package technology again at last mica paper tape insulating layer external forming oversheath layer can.
The invention has the beneficial effects that:
the invention provides a power cable for engineering construction, wherein an outer sheath layer is positioned outside the power cable to play a main protection role, acrylate rubber in the outer sheath layer component is an elastomer obtained by copolymerizing acrylate as a main monomer, the main chain of the elastomer is a saturated carbon chain, a side group of the elastomer is a polar ester group, as a special structure endows the elastomer with a plurality of excellent characteristics, such as heat resistance, aging resistance, oil resistance, ozone resistance, ultraviolet resistance and the like, and excellent mechanical properties and processing properties, an ethylene propylene diene monomer main chain is composed of chemically stable saturated hydrocarbon, only contains unsaturated double bonds in the side chain, so the elastomer has excellent aging resistance, such as ozone resistance, heat resistance, weather resistance and the like, POSS is used as one of silicon flame retardants, a ceramic-like silicon oxide heat insulation layer is formed on the surface after the whole combustion cracking process through a solid-phase flame retardant polymer, and the layer has a more compact structure than a common carbon layer, the OV-POSS can have a functional group with reactivity and is embedded into an ethylene propylene diene monomer molecular chain by a copolymerization method, and due to a cage-shaped structure, the movement of the chain segment can be limited to a certain degree, the stability of an outer sheath layer at high temperature is improved, magnesium hydroxide and aluminum hydroxide are chemically decomposed to absorb heat and release water vapor when being heated, the flame retardant is nontoxic and low in smoke, the chemical properties of decomposed products are stable, secondary pollution is not generated, the phosphorus-containing organic silicon flame retardant contains silicon and phosphorus, wherein the phosphorus element can inhibit combustion, acid-catalyzed dehydration and carbonization, and a surface barrier carbon film is formed to isolate air, the phosphorus-containing organic silicon flame retardant contains a siloxane structure, and siloxane often migrates to the surface of a polymer during combustion to form a high-molecular gradient material with a polysiloxane enrichment layer on the surface to achieve the flame retardant effect.
Drawings
FIG. 1 is a schematic structural view of a power cable for construction of an engineering structure according to the present invention;
FIG. 2 is a schematic structural diagram of a cable core;
the reference numbers in the figures represent respectively:
1-a cable core; 101-a wire; 102-a conductive line; 2-an insulating layer; 3-a shielding layer; 4-steel tape armor layer; 5-mica paper tape heat insulation layer; 6-outer sheath layer.
Detailed Description
The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are conventional products which are not indicated by manufacturers and are commercially available.
Example 1:
referring to fig. 1, the power cable for engineering construction includes a cable core (1), an insulating layer (2), a shielding layer (3), a steel tape armor layer (4), a mica paper tape thermal insulation layer (5), and an outer sheath layer (6);
the cable core (1) comprises a plurality of hinged wires (101) and an inner sheath layer (102) made of polyvinyl chloride materials and coated on the surfaces of the wires;
the insulating layer (2) comprises the following components:
35 parts of linear low-density polyethylene, 20 parts of ethylene-vinyl acetate copolymer, 15 parts of vinylidene fluoride and chlorotrifluoroethylene copolymer, 20 parts of hollow ceramic microspheres, 0.5 part of dibutyl phthalate, 0.2 part of maleic anhydride grafted polypropylene, 1 part of microcrystalline paraffin and 10100.2 parts of antioxidant.
The shielding layer (3) is a double-layer structure formed by uniformly arranging a plurality of strands of copper wires and lead layers.
The outer sheath layer (6) comprises the following components in parts by weight:
35 parts of acrylate rubber, 10 parts of OV-POSS modified ethylene propylene diene monomer, 10 parts of ethylene-vinyl acetate copolymer, 5 parts of carbon black, 10 parts of nano fumed silica, 0.5 part of dicumyl peroxide, 25 parts of magnesium hydroxide, 20 parts of aluminum hydroxide, 5 parts of phosphorus-containing organosilicon flame retardant, 0.5 part of stearic acid, 0.5 part of maleic anhydride grafted polypropylene, 0.2 part of hindered amine light stabilizer and 10100.5 parts of antioxidant.
The preparation method of the OV-POSS modified ethylene propylene diene monomer rubber comprises the following steps:
dissolving vinyltrimethoxysilane (68.9mL, 0.45mol) in acetone (675mL), uniformly mixing, dropwise adding a mixed solution of concentrated hydrochloric acid (112.5mL) and deionized water (129.6mL), refluxing at 40 ℃ for 48h to obtain white solid particles, carrying out suction filtration, washing with ethanol, recrystallizing by using a mixed solution of dichloromethane and acetone (volume ratio is 1: 3), carrying out vacuum drying at 60 ℃ to obtain white crystals, namely OVi-POSS, with the yield of 24.7%, adding vinyltrimethoxysilane (689mL, 4.5mol) into 6.75L of an absolute ethyl alcohol/water mixed solvent (volume ratio of absolute ethyl alcohol to water is 1:1), uniformly stirring, adding hydrochloric acid with the mass fraction of 10% to adjust the pH of the system to 2, heating to 60 ℃, reacting for 45h, recovering the room temperature, carrying out suction filtration, drying the obtained solid to obtain OV-POSS with the yield of 27.2%, adding 100g of ethylene propylene diene monomer and 80gOV-POSS into a torque rheometer, mixing for 10min at 90 ℃, and then 0.1g of dicumyl peroxide is added into the mixture for mixing for 15min, the temperature of the torque rheometer is raised to 170 ℃, the mixture is continuously mixed for 15min, and then the machine is stopped to discharge the mixture.
The preparation method of the phosphorus-containing organic silicon flame retardant comprises the following steps:
adding 110g of resorcinol and 5mL of triethylamine as an acid-binding agent into 1.1L of dimethylbenzene, stirring and heating to 120 ℃, dropwise adding 105.5g of phenyl dichlorophosphate, reacting for 12 hours in a heat preservation manner after dropwise adding, distilling under reduced pressure to remove dimethylbenzene, purifying the obtained solid column chromatography (eluent petroleum ether: ethyl acetate: 1) to obtain a phosphorus-containing intermediate, adding 5mL of triethylamine and 100g of the phosphorus-containing intermediate into 500mL of dioxane, dropwise adding 36g of dimethyldichlorosilane while stirring, heating to 90 ℃ after dropwise adding, and reacting for 24 hours in a heat preservation manner to obtain a silicon-phosphorus-containing intermediate; adding 50g of silicon-phosphorus-containing intermediate and water into dioxane, heating to 90 ℃, stirring for reacting for 15h, adding a proper amount of hexamethyldisiloxane for end capping, removing dioxane by reduced pressure distillation, washing the obtained solid with water and tetrahydrofuran in sequence, and finally drying in vacuum.
The invention also discloses a preparation method of the power cable for engineering construction, which comprises the following steps:
the method comprises the steps of forming an inner sheath layer (102) on the outer portion of a plurality of uniformly arranged wires by adopting an extrusion process to obtain a cable core (1), forming an insulating layer (2) on the outer portion of the plurality of cable cores (1) by adopting the extrusion process, forming a shielding layer (3) on the outer portion of the insulating layer (2) by adopting the extrusion process, forming a steel tape armor layer (4) on the outer portion of the shielding layer (3) by adopting the extrusion process, forming a mica paper tape heat insulation layer (5) on the outer portion of the steel tape armor layer (4) by adopting a wrapping process, and finally forming an outer sheath layer (6) on the outer portion of the mica paper tape heat insulation layer (5) by adopting the extrusion process.
Example 2:
referring to fig. 1, the power cable for engineering construction includes a cable core (1), an insulating layer (2), a shielding layer (3), a steel tape armor layer (4), a mica paper tape thermal insulation layer (5), and an outer sheath layer (6);
the cable core (1) comprises a plurality of hinged wires (101) and an inner sheath layer (102) made of polyvinyl chloride materials and coated on the surfaces of the wires;
the insulating layer (2) comprises the following components:
40 parts of linear low-density polyethylene, 20 parts of ethylene-vinyl acetate copolymer, 20 parts of vinylidene fluoride and chlorotrifluoroethylene copolymer, 25 parts of hollow ceramic microspheres, 1 part of dibutyl phthalate, 0.5 part of maleic anhydride grafted polypropylene, 2 parts of microcrystalline paraffin and 10100.2 parts of antioxidant.
The shielding layer (3) is a double-layer structure formed by uniformly arranging a plurality of strands of copper wires and lead layers.
The outer sheath layer (6) comprises the following components in parts by weight:
35 parts of acrylate rubber, 10 parts of OV-POSS modified ethylene propylene diene monomer, 15 parts of ethylene-vinyl acetate copolymer, 6 parts of carbon black, 10 parts of nano fumed silica, 0.5 part of dicumyl peroxide, 25 parts of magnesium hydroxide, 25 parts of aluminum hydroxide, 8 parts of phosphorus-containing organosilicon flame retardant, 0.5 part of stearic acid, 0.5 part of maleic anhydride grafted polypropylene, 0.5 part of hindered amine light stabilizer and 10100.5 parts of antioxidant.
The preparation method of the OV-POSS modified ethylene propylene diene monomer rubber comprises the following steps:
dissolving vinyltrimethoxysilane (68.9mL, 0.45mol) in acetone (675mL), uniformly mixing, dropwise adding a mixed solution of concentrated hydrochloric acid (112.5mL) and deionized water (129.6mL), refluxing at 40 ℃ for 48h to obtain white solid particles, carrying out suction filtration, washing with ethanol, recrystallizing by using a mixed solution of dichloromethane and acetone (volume ratio is 1: 3), carrying out vacuum drying at 60 ℃ to obtain white crystals, namely OVi-POSS, with the yield of 24.7%, adding vinyltrimethoxysilane (689mL, 4.5mol) into 6.75L of an absolute ethyl alcohol/water mixed solvent (volume ratio of absolute ethyl alcohol to water is 1:1), uniformly stirring, adding hydrochloric acid with the mass fraction of 10% to adjust the pH of the system to 3, heating to 60 ℃, reacting for 50h, recovering the room temperature, carrying out suction filtration, drying the obtained solid to obtain OV-POSS with the yield of 27.2%, adding 100g of ethylene propylene diene monomer and 80gOV-POSS into a torque rheometer, mixing for 10min at 90 ℃, and then 0.1g of dicumyl peroxide is added into the mixture for mixing for 20min, the temperature of the torque rheometer is raised to 170 ℃, the mixture is continuously mixed for 20min, and then the machine is stopped to discharge the mixture.
The preparation method of the phosphorus-containing organic silicon flame retardant comprises the following steps:
adding 110g of resorcinol and 5mL of triethylamine serving as an acid-binding agent into 1.1L of xylene, stirring and heating to 120 ℃, dropwise adding 105.5g of phenyl dichlorophosphate, carrying out heat preservation reaction for 15h after dropwise addition, carrying out reduced pressure distillation to remove the xylene, carrying out chromatography and purification on the obtained solid column (eluent petroleum ether: ethyl acetate 1:1) to obtain a phosphorus-containing intermediate, adding 5mL of triethylamine and 100g of the phosphorus-containing intermediate into 500mL of dioxane, dropwise adding 36g of dimethyldichlorosilane while stirring, heating to 100 ℃ after dropwise addition, and carrying out heat preservation reaction for 25h to obtain a silicon-phosphorus-containing intermediate; adding 50g of silicon-phosphorus-containing intermediate and water into dioxane, heating to 90 ℃, stirring for reacting for 15h, adding a proper amount of hexamethyldisiloxane for end capping, removing dioxane by reduced pressure distillation, washing the obtained solid with water and tetrahydrofuran in sequence, and finally drying in vacuum.
The invention also discloses a preparation method of the power cable for engineering construction, which comprises the following steps:
the method comprises the steps of forming an inner sheath layer (102) on the outer portion of a plurality of uniformly arranged wires by adopting an extrusion process to obtain a cable core (1), forming an insulating layer (2) on the outer portion of the plurality of cable cores (1) by adopting the extrusion process, forming a shielding layer (3) on the outer portion of the insulating layer (2) by adopting the extrusion process, forming a steel tape armor layer (4) on the outer portion of the shielding layer (3) by adopting the extrusion process, forming a mica paper tape heat insulation layer (5) on the outer portion of the steel tape armor layer (4) by adopting a wrapping process, and finally forming an outer sheath layer (6) on the outer portion of the mica paper tape heat insulation layer (5) by adopting the extrusion process.
Example 3:
referring to fig. 1, the power cable for engineering construction includes a cable core (1), an insulating layer (2), a shielding layer (3), a steel tape armor layer (4), a mica paper tape thermal insulation layer (5), and an outer sheath layer (6);
the cable core (1) comprises a plurality of hinged wires (101) and an inner sheath layer (102) made of polyvinyl chloride materials and coated on the surfaces of the wires;
the insulating layer (2) comprises the following components:
30 parts of linear low-density polyethylene, 10 parts of ethylene-vinyl acetate copolymer, 10 parts of vinylidene fluoride and chlorotrifluoroethylene copolymer, 20 parts of hollow ceramic microspheres, 0.5 part of dibutyl phthalate, 0.1 part of maleic anhydride grafted polypropylene, 1 part of microcrystalline paraffin and 10100.1 parts of antioxidant.
The shielding layer (3) is a double-layer structure formed by uniformly arranging a plurality of strands of copper wires and lead layers.
The outer sheath layer (6) comprises the following components in parts by weight:
30 parts of acrylate rubber, 5 parts of OV-POSS modified ethylene propylene diene monomer, 10 parts of ethylene-vinyl acetate copolymer, 4 parts of carbon black, 5 parts of nano fumed silica, 0.1 part of dicumyl peroxide, 20 parts of magnesium hydroxide, 20 parts of aluminum hydroxide, 4 parts of phosphorus-containing organosilicon flame retardant, 0.1 part of stearic acid, 0.1 part of maleic anhydride grafted polypropylene, 0.1 part of hindered amine light stabilizer and 10100.1 parts of antioxidant.
The preparation method of the OV-POSS modified ethylene propylene diene monomer rubber comprises the following steps:
dissolving vinyltrimethoxysilane (68.9mL, 0.45mol) in acetone (675mL), uniformly mixing, dropwise adding a mixed solution of concentrated hydrochloric acid (112.5mL) and deionized water (129.6mL), refluxing at 40 ℃ for 48h to obtain white solid particles, carrying out suction filtration, washing with ethanol, recrystallizing by using a mixed solution of dichloromethane and acetone (volume ratio is 1: 3), carrying out vacuum drying at 60 ℃ to obtain white crystals, namely OVi-POSS, with the yield of 24.7%, adding vinyltrimethoxysilane (689mL, 4.5mol) into 6.75L of an absolute ethyl alcohol/water mixed solvent (volume ratio of absolute ethyl alcohol to water is 1:1), uniformly stirring, adding hydrochloric acid with the mass fraction of 10% to adjust the pH of the system to 2, heating to 55 ℃ to react for 45h, recovering the room temperature, carrying out suction filtration, drying the obtained solid to obtain OV-POSS, with the yield of 27.2%, adding 100g of ethylene propylene diene monomer and 80gOV-POSS into a torque rheometer, mixing for 5min at 80 ℃, and then 0.1g of dicumyl peroxide is added into the mixture for mixing for 10min, the temperature of the torque rheometer is raised to 160 ℃, the mixture is continuously mixed for 10min, and then the machine is stopped to discharge the mixture.
The preparation method of the phosphorus-containing organic silicon flame retardant comprises the following steps:
adding 110g of resorcinol and 5mL of triethylamine as an acid-binding agent into 1.1L of dimethylbenzene, stirring and heating to 100 ℃, dropwise adding 105.5g of phenyl dichlorophosphate, reacting for 10 hours under a heat preservation condition after dropwise adding, distilling under reduced pressure to remove dimethylbenzene, purifying the obtained solid column chromatography (eluent petroleum ether: ethyl acetate: 1) to obtain a phosphorus-containing intermediate, adding 5mL of triethylamine and 100g of the phosphorus-containing intermediate into 500mL of dioxane, dropwise adding 36g of dimethyldichlorosilane while stirring, heating to 80 ℃ after dropwise adding, and reacting for 20 hours under a heat preservation condition to obtain a silicon-phosphorus-containing intermediate; adding 50g of silicon-phosphorus-containing intermediate and water into dioxane, heating to 80 ℃, stirring for reaction for 10 hours, adding a proper amount of hexamethyldisiloxane for end capping, removing dioxane by reduced pressure distillation, washing the obtained solid with water and tetrahydrofuran in sequence, and finally drying in vacuum.
The invention also discloses a preparation method of the power cable for engineering construction, which comprises the following steps:
the method comprises the steps of forming an inner sheath layer (102) on the outer portion of a plurality of uniformly arranged wires by adopting an extrusion process to obtain a cable core (1), forming an insulating layer (2) on the outer portion of the plurality of cable cores (1) by adopting the extrusion process, forming a shielding layer (3) on the outer portion of the insulating layer (2) by adopting the extrusion process, forming a steel tape armor layer (4) on the outer portion of the shielding layer (3) by adopting the extrusion process, forming a mica paper tape heat insulation layer (5) on the outer portion of the steel tape armor layer (4) by adopting a wrapping process, and finally forming an outer sheath layer (6) on the outer portion of the mica paper tape heat insulation layer (5) by adopting the extrusion process.
Example 4:
substantially the same as in example 1 except that the outer jacket layer (6) comprises the following composition in parts by weight:
35 parts of acrylate rubber, 5 parts of OV-POSS modified ethylene propylene diene monomer, 15 parts of ethylene-vinyl acetate copolymer, 4 parts of carbon black, 10 parts of nano fumed silica, 0.1 part of dicumyl peroxide, 25 parts of magnesium hydroxide, 20 parts of aluminum hydroxide, 8 parts of phosphorus-containing organosilicon flame retardant, 0.1 part of stearic acid, 0.5 part of maleic anhydride grafted polypropylene, 0.1 part of hindered amine light stabilizer and 10100.5 parts of antioxidant.
Example 5:
substantially the same as in example 1 except that the outer jacket layer (6) comprises the following composition in parts by weight:
30 parts of acrylate rubber, 10 parts of OV-POSS modified ethylene propylene diene monomer, 10 parts of ethylene-vinyl acetate copolymer, 6 parts of carbon black, 5 parts of nano fumed silica, 0.5 part of dicumyl peroxide, 20 parts of magnesium hydroxide, 25 parts of aluminum hydroxide, 4 parts of phosphorus-containing organosilicon flame retardant, 0.5 part of stearic acid, 0.1 part of maleic anhydride grafted polypropylene, 0.5 part of hindered amine light stabilizer and 10100.1 parts of antioxidant.
Comparative example 1
Basically the same as example 1, except that the OV-POSS modified ethylene propylene diene monomer rubber in the outer sheath layer (6) was replaced with an equal mass of ethylene propylene diene monomer rubber.
Comparative example 2
Essentially the same as example 1, except that no phosphorus containing silicone flame retardant was added.
And (3) performance testing:
according to the GB 12666.6-1990 electric wire and cable burning test method, the electric power cables for engineering buildings prepared in the examples 1-5 and the comparative examples 1-2 of the invention are subjected to burning tests, and the continuous flame power supply time is respectively recorded;
the test results are shown in table 1 below:
table 1:
the outer sheath layer (6) materials prepared in the embodiments 1-5 and the comparative examples 1-2 of the invention are used as samples, and the mechanical properties of the samples are tested according to GB/T7594-1987, GB/T5013-2008 and GB/T2951-2008 standards;
the Limiting Oxygen Index (LOI) of the test sample is tested according to GB/T2406-1993 standard;
the test results are shown in table 2 below:
table 2:
as can be seen from tables 1 and 2, the outer sheath layer material prepared by the invention has good mechanical properties, can play a good role in protection, has high limited oxygen index and excellent flame retardant property, and can continuously supply power for a long time when a power cable is burnt.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A power cable for engineering construction is characterized by comprising a cable core, an insulating layer, a shielding layer, a steel strip armor layer, a mica paper tape heat-insulating layer and an outer sheath layer;
the cable core comprises a plurality of hinged wires and an inner sheath layer coated on the surfaces of the wires;
the outer sheath layer comprises the following components:
acrylate rubber, OV-POSS modified ethylene propylene diene monomer, ethylene-vinyl acetate copolymer, carbon black, nano fumed silica, dicumyl peroxide, magnesium hydroxide, aluminum hydroxide, phosphorus-containing organosilicon flame retardant, stearic acid, maleic anhydride grafted polypropylene, hindered amine light stabilizer and antioxidant 1010.
2. The power cable for engineering and construction according to claim 1, wherein the outer sheath layer comprises the following components in parts by weight:
30-35 parts of acrylate rubber, 5-10 parts of OV-POSS modified ethylene propylene diene monomer, 10-15 parts of ethylene-vinyl acetate copolymer, 4-6 parts of carbon black, 5-10 parts of nano fumed silica, 0.1-0.5 part of dicumyl peroxide, 20-25 parts of magnesium hydroxide, 20-25 parts of aluminum hydroxide, 4-8 parts of phosphorus-containing organic silicon flame retardant, 0.1-0.5 part of stearic acid, 0.1-0.5 part of maleic anhydride grafted polypropylene, 0.1-0.5 part of hindered amine light stabilizer and 10100.1-0.5 part of antioxidant.
3. The power cable for engineering and construction according to claim 2, wherein the OV-POSS modified ethylene propylene diene monomer is prepared by the following method:
s1: adding vinyltrimethoxysilane into an absolute ethyl alcohol/water mixed solvent, uniformly stirring, adding hydrochloric acid to adjust the pH of the system to 2-3, heating to 55-60 ℃, reacting for 45-50h, recovering the room temperature, carrying out suction filtration, and drying the obtained solid to obtain OV-POSS;
s2: and adding the ethylene propylene diene monomer and the OV-POSS into a torque rheometer, mixing for 5-10min at the temperature of 80-90 ℃, adding dicumyl peroxide into the torque rheometer, mixing for 10-20min, heating the torque rheometer to the temperature of 160-170 ℃, continuing mixing for 10-20min, and stopping discharging.
4. The power cable for engineering construction as claimed in claim 3, wherein the mass ratio of the ethylene propylene diene monomer, OV-POSS and dicumyl peroxide is 1000-1200: 70-100: 1.
5. the power cable for engineering and construction according to claim 2, wherein the phosphorus-containing silicone flame retardant is prepared by the following method:
s1: adding triethylamine and resorcinol into xylene, stirring and heating to 100-120 ℃, dropwise adding phenyl dichlorophosphate, reacting for 10-15h under the condition of heat preservation after dropwise adding is finished, removing the xylene through reduced pressure distillation, and performing chromatographic purification on the obtained solid column to obtain a phosphorus-containing intermediate;
s2: adding triethylamine and a phosphorus-containing intermediate into dioxane, dropwise adding dimethyldichlorosilane while stirring, heating to 80-100 ℃ after dropwise adding, and reacting for 20-25h under the condition of heat preservation to obtain a silicon-phosphorus-containing intermediate;
s3: adding the silicon-phosphorus-containing intermediate and water into dioxane, heating to 80-90 ℃, stirring for reacting for 10-15h, adding hexamethyldisiloxane for end capping, carrying out reduced pressure distillation to remove dioxane, washing the obtained solid with water and tetrahydrofuran in sequence, and finally carrying out vacuum drying.
6. The power cable for engineering and construction according to claim 5, wherein the molar ratio of resorcinol to phenyl dichlorophosphate in S1 is 2-2.1: 1;
the molar ratio of the phosphorus-containing intermediate to the dimethyldichlorosilane in S2 is 1: 1-1.1.
7. The power cable for construction according to claim 1, wherein the shielding layer has a double-layered structure of a plurality of strands of copper wires and lead layers uniformly arranged.
8. The power cable for engineering and construction according to claim 1, wherein the insulation layer comprises the following components in parts by weight:
30-40 parts of linear low-density polyethylene, 10-20 parts of ethylene-vinyl acetate copolymer, 10-20 parts of vinylidene fluoride and chlorotrifluoroethylene copolymer, 20-25 parts of hollow ceramic microspheres, 0.5-1 part of dibutyl phthalate, 0.1-0.5 part of maleic anhydride grafted polypropylene, 1-2 parts of microcrystalline paraffin and 10100.1-0.2 part of antioxidant.
9. The power cable for engineering and construction according to claim 1, wherein the inner sheath layer is any one of polyethylene, polyvinyl chloride, chlorosulfonated polyethylene, and polytetrafluoroethylene.
10. The method for preparing the power cable for engineering construction according to any one of claims 1 to 9, wherein an extrusion process is used to form an inner sheath layer on the outside of a plurality of uniformly arranged wires to obtain a cable core, an extrusion process is used to form an insulating layer on the outside of a plurality of cable cores, an extrusion process is used to form a shielding layer on the outside of the insulating layer, an extrusion process is used to form a steel tape armor layer on the outside of the shielding layer, a wrapping process is used to form a mica paper tape thermal insulation layer on the outside of the steel tape armor layer, and an extrusion process is used to form an outer sheath layer on the outside of the mica paper tape thermal insulation layer.
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