CN113628805B - Aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable - Google Patents
Aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable Download PDFInfo
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- CN113628805B CN113628805B CN202110950413.6A CN202110950413A CN113628805B CN 113628805 B CN113628805 B CN 113628805B CN 202110950413 A CN202110950413 A CN 202110950413A CN 113628805 B CN113628805 B CN 113628805B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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- 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
- H01B7/02—Disposition of insulation
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- 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
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- 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
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- 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
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- 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
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- 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
Abstract
The invention relates to an aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable, and belongs to the technical field of cables. This fire-retardant power cable of insulating interlocking armor of aluminum alloy conductor crosslinked polyethylene, including the sinle silk, the sinle silk includes aluminum alloy conductor, the crowded package in the aluminum alloy conductor outside has the insulating layer, it has the filling layer to fill between the sinle silk, the filling layer outside is provided with around the covering, it has the inner liner to wrap around the crowded package in the covering outside, the inner liner outside covers there is the interlocking armor, the interlocking armor outside is provided with the oversheath. Through using the aluminum alloy conductor, compared with the cable of a copper conductor, the aluminum alloy conductor cable has the characteristics of being lighter, more flexible, more energy-saving and more economical than the copper cable, and compared with the aluminum core cable, the aluminum alloy cable overcomes the defects of poor mechanical property, bending property, creep resistance and corrosion resistance of the aluminum core cable, so that the aluminum alloy conductor cable is safer.
Description
Technical Field
The invention belongs to the technical field of cables, and relates to an aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable.
Background
The aluminum alloy low-voltage power cable is mainly applied to the field of buildings, industrial engineering and new energy engineering. Compared with copper cables, the aluminum alloy cable has the characteristics of being lighter, more flexible, more energy-saving and far more economical than the copper cables. Compared with the aluminum core cable, the aluminum alloy cable overcomes the defects of poor mechanical property, bending property, creep resistance and corrosion resistance of the aluminum core cable, thereby being safer and being deeply favored by users.
However, when the existing cable is used, the flame retardant effect of the electric wire is poor, so that the electric wire and the cable are short-circuited and fire-caught in use.
Disclosure of Invention
The invention aims to provide an aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides an aluminum alloy conductor crosslinked polyethylene insulation interlocking armor flame retardant power cable, includes the sinle silk, the sinle silk includes aluminum alloy conductor, the crowded package in the aluminum alloy conductor outside has the insulating layer, it has the filling layer to fill between the sinle silk, the filling layer outside is provided with around the covering, it has the inner liner to wrap around the crowded package in the covering outside, the inner liner outside covers there is the interlocking armor, the interlocking armor outside is provided with the oversheath.
Further, the outer sheath comprises the following raw materials in parts by weight: 45-60 parts of polyethylene, 10.6-12.5 parts of flame retardant, 2.3-3.6 parts of antioxidant and 1.4-2.7 parts of cross-linking agent;
the outer sheath is made by the following steps: adding polyethylene and a flame retardant into a double-roll open mill, milling for 5-15min at 90 ℃, carrying out melt mixing, adding an antioxidant and a crosslinking agent, mixing uniformly, and then milling for 15-25 min at 120-150 ℃ to obtain a mixed material; and feeding the mixed materials into a double-screw extruder, extruding and granulating, heating, melting, extruding and wrapping the interlocked armor layer.
Further, the flame retardant is prepared by the following steps:
s1: vacuumizing a reaction kettle, introducing nitrogen, adding magnesium powder and tetrahydrofuran into the reaction kettle, adjusting the temperature to be 15-5 ℃ below zero, slowly dropwise adding (chloromethyl) trichlorosilane and tetrahydrofuran, heating to 55-65 ℃ after dropwise adding is finished, and reacting for 2.5-3 hours to obtain an intermediate A;
s2: slowly dripping an ethynyl magnesium bromide solution into the intermediate A, keeping the temperature at 0-5 ℃, heating to 65-68 ℃ after dripping, stirring for reacting for 14-18h, cooling to-10 ℃ to-5 ℃ after reacting, adding lithium aluminum hydride, stirring for reacting for 12-14h, finally dripping a hydrochloric acid solution, standing for 5-6h, centrifugally washing for 5-6 times after reacting, and drying to obtain an intermediate B;
s3: putting the intermediate B into a vacuum drying oven, vacuumizing, heating to 140 ℃, and drying for 8 hours to obtain a dried intermediate B; adding the dried intermediate B and a xylene solution into a reaction kettle, uniformly stirring, heating to 95-100 ℃ under the protection of nitrogen, adding tetramethyl divinyl disilazane, uniformly stirring, performing reflux reaction for 5-6h, heating to 125-130 ℃, reacting for 15-18h, performing rotary evaporation to remove residual solvent after the reaction is finished, cooling to 110-115 ℃, and preserving heat for 2-2.5h to obtain an intermediate C;
s4: adding magnesium hydroxide and stearic acid into water, mixing and stirring uniformly, performing ultrasonic dispersion for 1.5-2h at room temperature, filtering, extracting with toluene for 8-10h, and drying to obtain modified magnesium hydroxide;
s5: and adding the intermediate C into a dimethylbenzene solution, uniformly stirring, adding the modified magnesium hydroxide, stirring for reacting for 15-45min, and then putting into a vacuum drying oven for drying for 5-7h to obtain the flame retardant.
Further, the ratio of the magnesium powder, tetrahydrofuran and (chloromethyl) trichlorosilane in step S1 is 1.25g:25mL of: 3.62mL.
Further, the dosage ratio of the intermediate A, the ethynylmagnesium bromide solution, the lithium aluminum hydride and the hydrochloric acid solution in the step S2 is 2.65g:6mL of: 1.36g:30mL.
Further, the intermediate B, the xylene solution and the tetramethyl divinyl disilazane in the step S3 are used in a ratio of 0.65mol:4.5mL:16mL.
Further, the dosage ratio of the intermediate C, the xylene solution and the modified magnesium hydroxide in the step S4 is 2.36:7.6mL:3.47g.
Further, the drying condition in step S4 is to use hot air flow drying at 80-85 ℃.
Further, the preparation method of the aluminum alloy conductor crosslinked polyethylene insulated interlocked armored flame-retardant power cable comprises the following steps:
the method comprises the following steps: drawing an aluminum alloy into an aluminum alloy thin wire, then stranding the aluminum alloy thin wire into a plurality of strands to form an aluminum alloy conductor, putting the aluminum alloy conductor into an annealing furnace for annealing, and extruding an insulating layer on the outer layer of the aluminum alloy conductor to prepare a wire core;
step two: and filling a filling layer between the wire cores, wrapping the lining layer, wrapping the interlocking armor layer outside the lining layer, and extruding the outer sheath outside the interlocking armor layer to obtain the aluminum alloy conductor crosslinked polyethylene insulated interlocking armored flame-retardant power cable.
Further, the insulating layer is a crosslinked polyethylene insulating layer; the filling layer is a water-blocking yarn filling layer; the inner liner is a non-woven fabric inner liner; the interlocking armor layer is an aluminum alloy belt interlocking armor layer.
The invention has the beneficial effects that:
(1) Through using the aluminum alloy conductor, compared with the cable of a copper conductor, the aluminum alloy conductor cable has the characteristics of being lighter, more flexible, more energy-saving and more economical than the copper cable, and compared with the aluminum core cable, the aluminum alloy cable overcomes the defects of poor mechanical property, bending property, creep resistance and corrosion resistance of the aluminum core cable, so that the aluminum alloy conductor cable is safer.
(2) The magnesium hydroxide is grafted with an alkyl chain, and the alkyl chain segment is diffused to the interface of polyethylene and is physically wound with a macromolecular chain thereof, so that the compatibility between the magnesium hydroxide and the polyolefin is improved, and the mechanical property of the material is improved.
(3) The preparation method comprises the steps of reacting (chloromethyl) trichlorosilane with magnesium powder to generate a synthetic intermediate A, reacting with unreacted Si-Cl and ethynyl magnesium bromide on the (chloromethyl) trichlorosilane, introducing-C ≡ CH into the intermediate A, reducing with lithium aluminum hydride to obtain an intermediate B, reacting the intermediate B with tetramethyl divinyl disilazane to obtain polycarbosilane, reacting the polycarbosilane with modified magnesium hydroxide to obtain a flame retardant, grafting the polycarbosilane into the magnesium hydroxide to enable the flame retardant to perform ceramic reaction during combustion, transferring the flame retardant to the surface from the inside of the cable and enriching, decomposing the magnesium hydroxide into magnesium oxide, reacting the polycarbosilane with the magnesium oxide to generate a magnesium silicate ceramic phase, forming a compact and continuous ceramic protective layer on the surface of a carbon layer, and playing a role of a binder in a carbonization process to enable polyethylene to form the carbon layer in the combustion process, so that the blocking effect of the carbon layer can be improved, and the flame retardance of the cable can be improved.
(4) Although polycarbosilane can generate methane combustible gas, the combustible concentration is increased, and the combustion is intensified, a continuous and compact protective layer is formed on the surface, so that the mass transfer process between condensed opposite gas phases can be effectively blocked, a certain expansion is generated in an area in the degradation process inside the cable after decomposition products are limited by a surface compact carbon layer, the heat transfer process of gas to the inside can be effectively blocked, and the degradation of the internal material of the cable due to heat is protected.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of an aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable according to the invention;
in the figure: 1. an aluminum alloy conductor; 2. an insulating layer; 3. a filling layer; 4. wrapping a covering; 5. an inner liner layer; 6. an interlocking armor layer; 7. an outer sheath.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, characteristics and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
Please refer to fig. 1, a fire-retardant power cable of insulating interlocking armor of aluminum alloy conductor crosslinked polyethylene, including the sinle silk, the sinle silk includes aluminum alloy conductor 1, 1 outside crowded package of aluminum alloy conductor has insulating layer 2, it has filling layer 3 to fill between the sinle silk, the 3 outside of filling layer is provided with around covering 4, 4 outside crowded packages of covering have inner liner 5, the 5 outside covers in inner liner has interlocking armor 6, 6 outside of interlocking armor are provided with oversheath 7.
Example 1
Preparing a flame retardant:
s1: vacuumizing the reaction kettle, introducing nitrogen, adding magnesium powder and tetrahydrofuran into the reaction kettle, adjusting the temperature to-15 ℃, then slowly dropwise adding (chloromethyl) trichlorosilane and tetrahydrofuran, and controlling the dosage ratio of the magnesium powder, the tetrahydrofuran and the (chloromethyl) trichlorosilane to be 1.25g:25mL of: 3.62mL, after the dropwise addition, heating to 55 ℃, and reacting for 2.5h to obtain an intermediate A;
s2: slowly dropwise adding an ethynyl magnesium bromide solution into the intermediate A, keeping the temperature at 0-5 ℃, heating to 65-68 ℃ after dropwise adding, stirring for reacting for 14h, cooling to-10 ℃ after the reaction is finished, adding lithium aluminum hydride, stirring for reacting for 12h, and finally dropwise adding a hydrochloric acid solution, wherein the dosage ratio of the intermediate A, the ethynyl magnesium bromide solution, the lithium aluminum hydride and the hydrochloric acid solution is controlled to be 2.65g:6mL of: 1.36g: standing for 5 hours by 30mL, centrifugally washing for 5 times after the reaction is finished, and drying to obtain an intermediate B;
s3: putting the intermediate B into a vacuum drying oven, vacuumizing, heating to 140 ℃, and drying for 8 hours to obtain a dried intermediate B; adding the dried intermediate B and the xylene solution into a reaction kettle, uniformly stirring, heating to 95 ℃ under the protection of nitrogen, adding tetramethyl divinyl disilazane, and controlling the dosage ratio of the intermediate B, the xylene solution and the tetramethyl divinyl disilazane to be 0.65mol:4.5mL:16mL, stirring uniformly, performing reflux reaction for 5h, heating to 125 ℃ for reaction for 15h, performing rotary evaporation on residual solvent after the reaction is finished, cooling to 110 ℃, and keeping the temperature for 2h to obtain an intermediate C;
s4: adding magnesium hydroxide and stearic acid into water, mixing and stirring uniformly, performing ultrasonic dispersion for 1.5-2h at room temperature, filtering, extracting with toluene for 8h, and drying to obtain modified magnesium hydroxide;
s5: adding the intermediate C into a dimethylbenzene solution, uniformly stirring, adding modified magnesium hydroxide, and controlling the dosage ratio of the intermediate C to the dimethylbenzene solution to be 2.36:7.6mL:3.47g, stirring and reacting for 15min, and then putting into a vacuum drying oven to dry for 5h to obtain the flame retardant.
Example 2
Preparing a flame retardant:
s1: vacuumizing the reaction kettle, introducing nitrogen, adding magnesium powder and tetrahydrofuran into the reaction kettle, adjusting the temperature to minus 10 ℃, then slowly dropwise adding (chloromethyl) trichlorosilane and tetrahydrofuran, and controlling the dosage ratio of the magnesium powder, the tetrahydrofuran and the (chloromethyl) trichlorosilane to be 1.25g:25mL of: 3.62mL, after the dropwise addition, heating to 60 ℃, and reacting for 2.7 hours to obtain an intermediate A;
s2: slowly dropwise adding an ethynyl magnesium bromide solution into the intermediate A, keeping the temperature at 3 ℃, heating to 66.5 ℃ after dropwise adding, stirring for reacting for 16h, cooling to minus 7 ℃ after the reaction is finished, adding lithium aluminum hydride, stirring for reacting for 13h, and finally dropwise adding a hydrochloric acid solution, wherein the dosage ratio of the intermediate A, the ethynyl magnesium bromide solution, the lithium aluminum hydride and the hydrochloric acid solution is controlled to be 2.65g:6mL of: 1.36g: standing for 5-6h for 30mL, centrifugally washing for 5 times after the reaction is finished, and drying to obtain an intermediate B;
s3: putting the intermediate B into a vacuum drying oven, vacuumizing, heating to 140 ℃, and drying for 8 hours to obtain a dried intermediate B; adding the dried intermediate B and the xylene solution into a reaction kettle, uniformly stirring, heating to 97 ℃ under the protection of nitrogen, adding tetramethyl divinyl disilazane, and controlling the dosage ratio of the intermediate B, the xylene solution and the tetramethyl divinyl disilazane to be 0.65mol:4.5mL:16mL, stirring uniformly, performing reflux reaction for 5-6h, heating to 128 ℃ for 17h, performing rotary evaporation on residual solvent after the reaction is finished, cooling to 113 ℃, and keeping the temperature for 2.3h to obtain an intermediate C;
s4: adding magnesium hydroxide and stearic acid into water, mixing and stirring uniformly, performing ultrasonic dispersion for 1.5-2h at room temperature, filtering, extracting for 9h by using toluene, and drying to obtain modified magnesium hydroxide;
s5: adding the intermediate C into a dimethylbenzene solution, uniformly stirring, adding modified magnesium hydroxide, and controlling the dosage ratio of the intermediate C to the dimethylbenzene solution to be 2.36:7.6mL:3.47g, stirring and reacting for 30min, and then putting into a vacuum drying oven to dry for 6h to obtain the flame retardant.
Example 3
Preparing a flame retardant:
s1: vacuumizing the reaction kettle, introducing nitrogen, adding magnesium powder and tetrahydrofuran into the reaction kettle, adjusting the temperature to-5 ℃, then slowly dropwise adding (chloromethyl) trichlorosilane and tetrahydrofuran, and controlling the dosage ratio of the magnesium powder, the tetrahydrofuran and the (chloromethyl) trichlorosilane to be 1.25g:25mL of: 3.62mL, after the dropwise addition, heating to 65 ℃, and reacting for 3 hours to obtain an intermediate A;
s2: slowly dropwise adding an ethynyl magnesium bromide solution into the intermediate A, keeping the temperature at 5 ℃, heating to 68 ℃ after dropwise adding, stirring for reacting for 18 hours, cooling to-5 ℃ after the reaction is finished, adding lithium aluminum hydride, stirring for reacting for 14 hours, and finally dropwise adding a hydrochloric acid solution, wherein the dosage ratio of the intermediate A, the ethynyl magnesium bromide solution, the lithium aluminum hydride and the hydrochloric acid solution is controlled to be 2.65g:6mL of: 1.36g: standing for 6 hours by 30mL, centrifugally washing for 6 times after the reaction is finished, and drying to obtain an intermediate B;
s3: putting the intermediate B into a vacuum drying oven, vacuumizing, heating to 140 ℃, and drying for 8 hours to obtain a dried intermediate B; adding the dried intermediate B and the xylene solution into a reaction kettle, uniformly stirring, heating to 100 ℃ under the protection of nitrogen, adding tetramethyl divinyl disilazane, and controlling the dosage ratio of the intermediate B, the xylene solution and the tetramethyl divinyl disilazane to be 0.65mol:4.5mL:16mL, stirring uniformly, performing reflux reaction for 6h, heating to 130 ℃ for 18h, performing rotary evaporation to remove residual solvent after the reaction is finished, cooling to 115 ℃, and keeping the temperature for 2.5h to obtain an intermediate C;
s4: adding magnesium hydroxide and stearic acid into water, mixing and stirring uniformly, performing ultrasonic dispersion for 1.5-2h at room temperature, filtering, extracting with toluene for 10h, and drying to obtain modified magnesium hydroxide;
s5: adding the intermediate C into a dimethylbenzene solution, uniformly stirring, adding modified magnesium hydroxide, and controlling the dosage ratio of the intermediate C to the dimethylbenzene solution to be 2.36:7.6mL:3.47g, stirring and reacting for 45min, and then putting into a vacuum drying oven for drying for 7h to obtain the flame retardant.
Example 4
Preparing an outer sheath:
the outer sheath 7 comprises the following raw materials in parts by weight: 45 parts of polyethylene, 10.6 parts of flame retardant prepared in example 2, 2.3 parts of antioxidant and 1.4 parts of crosslinking agent;
the outer sheath 7 is made by the following steps: adding polyethylene and a flame retardant into a double-roll open mill, milling for 5min at 90 ℃, carrying out melt mixing, adding an antioxidant and a crosslinking agent, mixing uniformly, and then mixing for 15min at 120 ℃ to obtain a mixed material; and feeding the mixed materials into a double-screw extruder, extruding and granulating, heating, melting, extruding and wrapping the outside of the interlocking armor layer 6.
Example 5
Preparing an outer sheath:
the outer sheath 7 comprises the following raw materials in parts by weight: 55 parts of polyethylene, 11.5 parts of the flame retardant prepared in example 2, 3 parts of antioxidant and 2 parts of crosslinking agent;
the outer sheath 7 is made by the following steps: adding polyethylene and a flame retardant into a double-roll open mill, milling for 10min at 90 ℃, carrying out melt mixing, adding an antioxidant and a crosslinking agent, mixing uniformly, and then mixing for 20 min at 130 ℃ to obtain a mixed material; and feeding the mixed materials into a double-screw extruder, extruding and granulating, heating, melting, extruding and wrapping the outside of the interlocking armor layer 6.
Example 6
Preparing an outer sheath:
the outer sheath 7 comprises the following raw materials in parts by weight: 60 parts of polyethylene, 12.5 parts of flame retardant prepared in example 2, 3.6 parts of antioxidant and 2.7 parts of crosslinking agent;
the outer sheath 7 is made by the following steps: adding polyethylene and a flame retardant into a double-roll open mill, milling for 15min at 90 ℃, carrying out melt mixing, adding an antioxidant and a crosslinking agent, mixing uniformly, and then mixing for 25 min at 150 ℃ to obtain a mixed material; and feeding the mixed materials into a double-screw extruder, extruding and granulating, heating, melting, extruding and wrapping the interlocking armor layer 6.
Example 7
The preparation method of the aluminum alloy conductor crosslinked polyethylene insulation interlocked armored flame-retardant power cable comprises the following steps:
the method comprises the following steps: drawing an aluminum alloy into an aluminum alloy thin wire, then stranding the aluminum alloy thin wire to form an aluminum alloy conductor 1, putting the aluminum alloy conductor 1 into an annealing furnace for annealing, and extruding an insulating layer 2 on the outer layer of the aluminum alloy conductor 1 to prepare a wire core;
step two: and filling a filling layer 3 between the wire cores, winding and wrapping the lining layer 5, wrapping the interlocking armor layer 6 outside the lining layer 5, and extruding the outer sheath 7 prepared in the embodiment 5 outside the interlocking armor layer 6 to obtain the aluminum alloy conductor 1 crosslinked polyethylene insulation interlocking armored flame-retardant power cable.
The aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cables prepared in the examples 5 to 7 and the comparative example are tested for flame-retardant performance by using a ZLT-UL94 vertical combustion tester according to a vertical combustion test standard UL94-2015, and the tensile strength and the elongation at break of the cable are detected according to GB/T1040, and the results are shown in the following table:
as can be seen from the table, the cable prepared by the above examples has excellent flame retardant property and good mechanical property.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides an aluminum alloy conductor crosslinked polyethylene insulation interlocking armor flame retardant power cable which characterized in that: the cable comprises cable cores, wherein each cable core comprises an aluminum alloy conductor (1), an insulating layer (2) is extruded on the outer side of each aluminum alloy conductor (1), filling layers (3) are filled among the cable cores, a wrapping layer (4) is arranged on the outer side of each filling layer (3), an inner lining layer (5) is extruded on the outer side of each wrapping layer (4), an interlocking armor layer (6) is covered on the outer side of each inner lining layer (5), and an outer sheath (7) is arranged on the outer side of each interlocking armor layer (6);
the outer sheath (7) comprises the following raw materials in parts by weight: 45-60 parts of polyethylene, 10.6-12.5 parts of flame retardant, 2.3-3.6 parts of antioxidant and 1.4-2.7 parts of cross-linking agent;
the outer sheath (7) is made by the following steps: adding polyethylene and a flame retardant into a double-roll open mill, milling for 5-15min at 90 ℃, carrying out melt mixing, adding an antioxidant and a crosslinking agent, mixing uniformly, and then milling for 15-25 min at 120-150 ℃ to obtain a mixed material; feeding the mixed materials into a double-screw extruder, extruding and granulating, heating and melting, extruding and wrapping the interlocking armor layer (6) at the outer side;
the flame retardant is prepared by the following steps:
s1: vacuumizing a reaction kettle, introducing nitrogen, adding magnesium powder and tetrahydrofuran into the reaction kettle, adjusting the temperature to be 15-5 ℃ below zero, slowly dropwise adding (chloromethyl) trichlorosilane and tetrahydrofuran, heating to 55-65 ℃ after dropwise adding is finished, and reacting for 2.5-3 hours to obtain an intermediate A;
s2: slowly dripping an ethynyl magnesium bromide solution into the intermediate A, keeping the temperature at 0-5 ℃, heating to 65-68 ℃ after dripping, stirring and reacting for 14-18h, cooling to-10 ℃ -5 ℃, adding lithium aluminum hydride, stirring and reacting for 12-14h, finally dripping a hydrochloric acid solution, standing for 5-6h, centrifugally washing for 5-6 times, and drying to obtain an intermediate B;
s3: adding the dried intermediate B and a xylene solution into a reaction kettle, uniformly stirring, heating to 95-100 ℃ under the protection of nitrogen, adding tetramethyl divinyl disilazane, performing reflux reaction for 5-6h, heating to 125-130 ℃ for reaction for 15-18h, performing rotary evaporation to remove residual solvent after the reaction is finished, cooling to 110-115 ℃, and performing heat preservation for 2-2.5h to obtain an intermediate C;
s4: and adding the intermediate C into a dimethylbenzene solution, uniformly stirring, adding the modified magnesium hydroxide, stirring for reacting for 15-45min, and then putting into a vacuum drying oven for drying for 5-7h to obtain the flame retardant.
2. The aluminum alloy conductor crosslinked polyethylene insulation interlocked armored flame-retardant power cable as claimed in claim 1, wherein: in the step S1, the dosage ratio of the magnesium powder, the tetrahydrofuran and the (chloromethyl) trichlorosilane is 1.25g:25mL of: 3.62mL.
3. The aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable according to claim 1, wherein: the dosage ratio of the intermediate A, the ethynyl magnesium bromide solution, the lithium aluminum hydride and the hydrochloric acid solution in the step S2 is 2.65g:6mL of: 1.36g:30mL.
4. The aluminum alloy conductor crosslinked polyethylene insulation interlocked armored flame-retardant power cable as claimed in claim 1, wherein: the dosage ratio of the intermediate B, the xylene solution and the tetramethyl divinyl disilazane in the step S3 is 0.65mol:4.5mL:16mL.
5. The aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable according to claim 1, wherein: the dosage ratio of the intermediate C, the xylene solution and the modified magnesium hydroxide in the step S4 is 2.36:7.6mL:3.47g.
6. The aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable according to claim 1, wherein: the drying condition in the step S4 is to use hot air of 80-85 ℃ for flowing drying.
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| CN202110950413.6A CN113628805B (en) | 2021-08-18 | 2021-08-18 | Aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable |
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| CN202110950413.6A CN113628805B (en) | 2021-08-18 | 2021-08-18 | Aluminum alloy conductor crosslinked polyethylene insulation interlocking armored flame-retardant power cable |
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| CN113628805B true CN113628805B (en) | 2023-03-31 |
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| CN203596200U (en) * | 2013-11-26 | 2014-05-14 | 四川川东电缆有限责任公司 | Novel aluminum alloy power cable |
| US11646134B2 (en) * | 2016-07-27 | 2023-05-09 | Schlumberger Technology Corporation | Armored submersible power cable |
| CN108091439B (en) * | 2017-12-28 | 2024-03-22 | 扬州曙光电缆股份有限公司 | Flame-retardant fire-resistant solar photovoltaic cable |
| US10998110B2 (en) * | 2019-01-18 | 2021-05-04 | Priority Wire & Cable, Inc. | Flame resistant covered conductor cable |
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