CN114898923A - Double-layer high-insulation electric wire - Google Patents

Double-layer high-insulation electric wire Download PDF

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Publication number
CN114898923A
CN114898923A CN202210509187.2A CN202210509187A CN114898923A CN 114898923 A CN114898923 A CN 114898923A CN 202210509187 A CN202210509187 A CN 202210509187A CN 114898923 A CN114898923 A CN 114898923A
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China
Prior art keywords
layer
flame
raw material
retardant
insulation
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CN202210509187.2A
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Chinese (zh)
Inventor
张松
温立锁
颜立宁
田京芳
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Guangxi Runxiong Power Technology Co ltd
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Guangxi Runxiong Power Technology Co ltd
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Priority to CN202210509187.2A priority Critical patent/CN114898923A/en
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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
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
    • A01M29/12—Scaring or repelling devices, e.g. bird-scaring apparatus using odoriferous substances, e.g. aromas, pheromones or chemical agents
    • 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
    • H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
    • 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
    • H01B7/29—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
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/023—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of helicoidally wound tape-conductors
    • 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
    • H01B9/025—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of helicoidally wound wire-conductors
    • 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 discloses a double-layer high-insulation wire, which relates to the field of wire manufacturing, and comprises a conductor, wherein the outer surface of the conductor is coated with a first insulation layer, the outer surface of the first insulation layer is coated with a second insulation layer, extracts of three groups of plants, namely pepper, mint and camphor, are added in the process of manufacturing a protective sleeve, so that insects and ants can be repelled and mice can be prevented from being bitten, and the service life of the wire is further prolonged. And then the insulating property and the flame retardant property of the electric wire are improved, and the electric wire has the advantages of large current-carrying capacity and strong aging resistance.

Description

Double-layer high-insulation electric wire
Technical Field
The invention relates to the field of wire manufacturing, in particular to a double-layer high-insulation wire.
Background
The electric wire and cable is the most common electronic component in daily life, and the shadow is formed in the place where electricity is used, wherein one type of electric wire and cable is called as a mineral cable, and the electric wire and cable is a high-temperature-resistant cable formed by filling copper wires serving as conductors and magnesium oxide into copper sheaths.
The current electric wire can receive gnawing of biology such as insect and mouse to sting the destruction, and then makes the protective layer of electric wire destroyed, and then the condition that the electric leakage appears easily, incident such as the incident of electric shock easily takes place to, current electric wire intensity is relatively poor, when receiving the striking, takes place deformation very easily, and then leads to the sinle silk impaired, and secondly the electric wire receives the interference of external static very easily.
Disclosure of Invention
Based on the above, the invention aims to provide a double-layer high-insulation electric wire to solve the technical problems of insufficient protection and poor shielding performance.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a double-deck high insulated wire, includes the conductor, the surface cladding of conductor has the first insulation layer, the surface cladding on first insulation layer has the second insulating layer, the surface cladding of second insulating layer has fire-retardant layer, the surface on fire-retardant layer has first shielding layer around the package, the surface on first shielding layer has the second shielding layer around the package, the surface cladding of second shielding layer has the restrictive coating.
The method for manufacturing a double-layer high-insulation electric wire according to claim 1, wherein: the method comprises the following specific steps:
step 1: putting a copper rod into a metal wire drawing machine at normal temperature for wire drawing treatment, then putting the drawn wire into an annealing furnace, heating to 55-70 ℃, carrying out annealing treatment to obtain a copper monofilament, and then twisting the copper monofilament by using a wire twisting machine in a twisting mode of concentric compound twisting to form a conductor;
and 2, step: extruding an insulating material on the surface of the conductor by using an extruding machine to form a first insulating layer;
and step 3: twisting the conductor with the first insulating layer into a cable core, and extruding a second insulating layer outside the twisted cable core;
and 4, step 4: by adopting a power frequency spark machine, the relation between the test voltage U and the insulation thickness delta is as follows: when delta is less than or equal to 0.4 mm, U is 4 kilovolts;
and 5: performing electron irradiation crosslinking processing on the extruded insulating layer by adopting an electron accelerator;
and 6: putting the phenolic resin, the modified carrageenan and the ethylene-vinyl acetate copolymer into a large stirrer, mixing and stirring for 4-8 minutes, then mixing and stirring aluminum hydroxide and zinc borate, adding a smoke suppressor, a coupling agent and a stabilizer, and continuing stirring at high speed until the temperature reaches 100 ℃ to obtain a flame-retardant coating raw material;
and 7: after the flame-retardant coating raw material is cooled to 60-75 ℃, the flame-retardant coating raw material is extruded and coated on the second insulating layer in the step 3 to form a flame-retardant layer, and then an electron accelerator is adopted to carry out electron irradiation crosslinking processing on the extruded flame-retardant layer;
and 8: tightly and spirally winding a copper wire on the flame-retardant layer to form a first shielding layer;
and step 9: tightly and spirally winding an aluminum strip on the first shielding layer to form a second shielding layer;
step 10: mixing and stirring pepper, mint and camphor, squeezing and juicing, extracting plant liquid, mixing the plant liquid with clear water according to the proportion of 1:2 to obtain insect-proof liquid, selecting crosslinked polyethylene as a raw material of a protective sleeve, and putting the raw material and the insect-proof liquid into a stirrer to be stirred to obtain a raw material of the protective sleeve;
step 11: after the flame-retardant coating raw material is cooled to 50-65 ℃, extruding and coating the protective raw material on the flame-retardant layer in the step 7 to form a sheath layer, thus obtaining the power cable;
step 12: and winding the manufactured cable body into a cable by using a cable cabling machine in a non-back-twist mode, spraying corresponding characters on the cable by using an ink-jet printer in the winding process, drying the ink by using an air heater, detecting the finished product, and warehousing the finished product if the finished product is qualified.
Further, the preparation method of the first insulating layer and the second insulating layer comprises the following steps: adding nano silicon oxide into the epoxy resin adhesive to obtain a system substance; mixing quartz powder and alumina powder to obtain a mixture; and stirring the system substance and the mixture until the system substance and the mixture are uniformly mixed to obtain the insulating raw material.
By adopting the technical scheme, the phenomena of pre-crosslinking during crosslinking and reduction of insulation resistance due to the fact that the insulation layer absorbs moisture in air are prevented, and therefore the insulation resistance value is guaranteed.
Further, before annealing the material in the step 1, vacuumizing is firstly performed in an annealing furnace, and then nitrogen is filled.
By adopting the technical scheme, the copper wire can be prevented from being oxidized in the annealing process, and the service life of the copper wire is prolonged.
Further, in the step 6, the inside of the stirrer is heated to 70-90 ℃, and the stirring is carried out for 8-10 minutes at a rotation speed of 450-600 r/min.
By adopting the technical scheme, the plant liquid can be fully mixed and blended with the crosslinked polyethylene, so that the distribution uniformity of the plant liquid is improved, and the insect and mouse prevention effect is more ideal.
Further, the stirring time of the aluminum hydroxide and the zinc borate in the step 6 is 5-15 minutes, and the rotating speed is 300-450 r/min; after the smoke suppressor, the coupling agent and the stabilizing agent are added, the operation is continued for 10 to 16 minutes at the rotating speed of 700 and 900 r/min.
By adopting the technical scheme, the raw materials can be fully fused, and the flame-retardant effect of the flame-retardant layer is further improved.
In summary, the invention mainly has the following beneficial effects: according to the invention, the sheath layer is arranged, and extracts of three groups of plants, namely the pepper, the mint and the camphor, are added in the process of manufacturing the sheath, so that insects and ants can be effectively repelled, and mice can be prevented from gnawing, and the service life of the wire is further prolonged; the first shielding layer and the second shielding layer are arranged, so that the electrostatic interference of the outside to a circuit is greatly reduced, the shielding performance of the cable is improved, and the working performance of the wire is more stable.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a conductor; 2. a first insulating layer; 3. a second insulating layer; 4. a flame retardant layer; 5. a first shielding layer; 6. a second shielding layer; 7. a sheath layer.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The following describes an embodiment of the present invention based on its overall structure.
Example 1: the utility model provides a double-deck high-insulation wire, as shown in fig. 1, includes conductor 1, the surface cladding of conductor 1 has first insulating layer 2, the surface cladding of first insulating layer 2 has second insulating layer 3, the surface cladding of second insulating layer 3 has fire-retardant layer 3, fire-retardant layer 4's surface has first shielding layer 5 around having wound, the surface of first shielding layer 5 has second shielding layer 6 around having wound, the surface cladding of second shielding layer 6 has restrictive coating 7.
A manufacturing method of a double-layer high-insulation wire comprises the following specific steps:
step 1: putting a copper rod into a metal wire drawing machine at normal temperature for wire drawing treatment, then putting the drawn wire into an annealing furnace, heating to 55 ℃, carrying out annealing treatment to obtain a copper monofilament, and then twisting the copper monofilament by using a wire twisting machine in a twisting mode of concentric compound twisting to form a conductor 1;
and 2, step: extruding the insulating material on the surface of the conductor by using an extruding machine to form a first insulating layer 2;
and step 3: twisting the conductor with the first insulating layer into a cable core, and extruding a second insulating layer 3 outside the twisted cable core;
and 4, step 4: by adopting a power frequency spark machine, the relation between the test voltage U and the insulation thickness delta is as follows: when delta is less than or equal to 0.4 mm, U is 4 kilovolts;
and 5: performing electron irradiation crosslinking processing on the extruded insulating layer by adopting an electron accelerator;
step 6: putting the phenolic resin, the modified carrageenan and the ethylene-vinyl acetate copolymer into a large stirrer, mixing and stirring for 4-8 minutes, then mixing and stirring aluminum hydroxide and zinc borate, adding a smoke suppressor, a coupling agent and a stabilizer, and continuing stirring at high speed until the temperature reaches 100 ℃ to obtain a flame-retardant coating raw material;
and 7: after the flame-retardant coating raw material is cooled to 60 ℃, extruding and coating the flame-retardant coating raw material on the second insulating layer 3 in the step 3 to form a flame-retardant layer 4, and then carrying out electron irradiation crosslinking processing on the extruded flame-retardant layer 4 by using an electron accelerator;
and 8: tightly and spirally winding a copper wire on the flame-retardant layer 4 to form a first shielding layer 5;
and step 9: tightly and spirally winding an aluminum strip on the first shielding layer 5 to form a second shielding layer 6;
step 10: mixing and stirring pepper, mint and camphor, squeezing and juicing, extracting plant liquid, mixing the plant liquid with clear water according to the proportion of 1:2 to obtain insect-proof liquid, selecting crosslinked polyethylene as a raw material of a protective sleeve, and putting the raw material and the insect-proof liquid into a stirrer to be stirred to obtain a raw material of the protective sleeve;
step 11: after the flame-retardant coating raw material is cooled to 50 ℃, extruding and coating the protective raw material on the flame-retardant layer in the step 7 to form a sheath layer 7, thus obtaining the power cable;
step 12: and winding the manufactured cable body into a cable by using a cable cabling machine in a non-back-twist mode, spraying corresponding characters on the cable by using an ink-jet printer in the winding process, drying the ink by using an air heater, detecting the finished product, and warehousing the finished product if the finished product is qualified.
Further, the preparation method of the first insulating layer 2 and the second insulating layer 3 comprises the following steps: adding nano silicon oxide into the epoxy resin adhesive to obtain a system substance; mixing quartz powder and alumina powder to obtain a mixture; and stirring the system substance and the mixture until the system substance and the mixture are uniformly mixed to obtain the insulating raw material.
Further, before annealing the material in the step 1, vacuumizing is firstly performed in an annealing furnace, and then nitrogen is filled.
By adopting the technical scheme, the copper wire can be prevented from being oxidized in the annealing process, and the service life of the copper wire is prolonged.
Further, in the step 6, the inside of the stirrer is heated to 90 ℃, and the stirring is carried out for 8 minutes at the rotating speed of 600 r/min.
By adopting the technical scheme, the plant liquid can be fully mixed and blended with the crosslinked polyethylene, so that the distribution uniformity of the plant liquid is improved, and the insect and mouse prevention effect is more ideal.
Further, in the step 6, the stirring time of the aluminum hydroxide and the zinc borate is 15 minutes, and the rotating speed is 300 r/min; adding the smoke suppressor, the coupling agent and the stabilizer, and continuing for 16 minutes at the rotating speed of 700 r/min.
By adopting the technical scheme, the raw materials can be fully fused, and the flame-retardant effect of the flame-retardant layer 4 is further improved.
Example 2: the difference from example 1 is that: step 1: putting a copper rod into a metal wire drawing machine at normal temperature for wire drawing treatment, then putting the drawn wire into an annealing furnace, heating to 60 ℃, carrying out annealing treatment to obtain a copper monofilament, and then stranding the copper monofilament by using a stranding mode of concentric compound stranding of a stranding machine to form a conductor 1;
step 2: extruding the insulating material on the surface of the conductor by using an extruding machine to form a first insulating layer 2;
and step 3: twisting the conductor with the first insulating layer into a cable core, and extruding a second insulating layer 3 outside the twisted cable core;
and 4, step 4: by adopting a power frequency spark machine, the relation between the test voltage U and the insulation thickness delta is as follows: when delta is less than or equal to 0.4 mm, U is 4 kilovolts;
and 5: performing electron irradiation crosslinking processing on the extruded insulating layer by adopting an electron accelerator;
step 6: putting the phenolic resin, the modified carrageenan and the ethylene-vinyl acetate copolymer into a large stirrer, mixing and stirring for 6 minutes, then mixing and stirring aluminum hydroxide and zinc borate, adding a smoke suppressor, a coupling agent and a stabilizer, and continuing stirring at high speed until the temperature reaches 100 ℃ to obtain a flame-retardant coating raw material;
and 7: after the flame-retardant coating raw material is cooled to 58 ℃, extruding and coating the flame-retardant coating raw material on the second insulating layer 3 in the step 3 to form a flame-retardant layer 4, and then carrying out electron irradiation crosslinking processing on the extruded flame-retardant layer 4 by using an electron accelerator;
and 8: tightly and spirally winding a copper wire on the flame-retardant layer 4 to form a first shielding layer 5;
and step 9: tightly and spirally winding an aluminum strip on the first shielding layer 5 to form a second shielding layer 6;
step 10: mixing and stirring pepper, mint and camphor, squeezing and juicing, extracting plant liquid, mixing the plant liquid with clear water according to the proportion of 1:2 to obtain insect-proof liquid, selecting crosslinked polyethylene as a raw material of a protective sleeve, and putting the raw material and the insect-proof liquid into a stirrer to be stirred to obtain a raw material of the protective sleeve;
step 11: after the flame-retardant coating raw material is cooled to 58 ℃, extruding and coating the protective raw material on the flame-retardant layer in the step 7 to form a sheath layer 7, thus obtaining the power cable;
step 12: and winding the manufactured cable body into a cable by using a cable cabling machine in a non-back-twist mode, spraying corresponding characters on the cable by using an ink-jet printer in the winding process, drying the ink by using an air heater, detecting the finished product, and warehousing the finished product if the finished product is qualified.
Further, the preparation method of the first insulating layer 2 and the second insulating layer 3 comprises the following steps: adding nano silicon oxide into the epoxy resin adhesive to obtain a system substance; mixing quartz powder and alumina powder to obtain a mixture; and stirring the system substance and the mixture until the system substance and the mixture are uniformly mixed to obtain the insulating raw material.
By adopting the technical scheme, the phenomena of pre-crosslinking during crosslinking and reduction of insulation resistance due to the fact that the insulation layer absorbs moisture in air are prevented, and therefore the insulation resistance value is guaranteed.
Further, before annealing the material in the step 1, the annealing furnace is vacuumized and then filled with nitrogen.
By adopting the technical scheme, the copper wire can be prevented from being oxidized in the annealing process, and the service life of the copper wire is prolonged.
Further, in the step 6, the inside of the stirrer is heated to 80 ℃, and the stirring is carried out for 9 minutes at the rotating speed of 500 r/min.
By adopting the technical scheme, the plant liquid can be fully mixed and blended with the crosslinked polyethylene, so that the distribution uniformity of the plant liquid is improved, and the insect and mouse prevention effect is more ideal.
Further, in the step 6, the stirring time of the aluminum hydroxide and the zinc borate is 10 minutes, and the rotating speed is 380 r/min; adding the smoke suppressor, the coupling agent and the stabilizer, and continuing for 13 minutes at the rotating speed of 800 r/min.
By adopting the technical scheme, the raw materials can be fully fused, and the flame-retardant effect of the flame-retardant layer 4 is further improved.
Example 3: the difference from example 2 is that:
step 1: putting a copper rod into a metal wire drawing machine at normal temperature for wire drawing treatment, then putting the drawn wire into an annealing furnace, heating to 70 ℃, carrying out annealing treatment to obtain a copper monofilament, and then twisting the copper monofilament by using a wire twisting machine in a twisting mode of concentric compound twisting to form a conductor 1;
step 2: extruding the insulating material on the surface of the conductor by using an extruding machine to form a first insulating layer 2;
and step 3: twisting the conductor with the first insulating layer into a cable core, and extruding a second insulating layer 3 outside the twisted cable core;
and 4, step 4: by adopting a power frequency spark machine, the relation between the test voltage U and the insulation thickness delta is as follows: when delta is less than or equal to 0.4 mm, U is 4 kilovolts;
and 5: carrying out electron irradiation crosslinking processing on the extruded insulating layer by adopting an electron accelerator;
step 6: putting the phenolic resin, the modified carrageenan and the ethylene-vinyl acetate copolymer into a large stirrer, mixing and stirring for 8 minutes, then mixing and stirring aluminum hydroxide and zinc borate, adding a smoke suppressor, a coupling agent and a stabilizer, and continuing stirring at high speed until the temperature reaches 100 ℃ to obtain a flame-retardant coating raw material;
and 7: after the flame-retardant coating raw material is cooled to 75 ℃, the flame-retardant coating raw material is extruded and coated on the second insulating layer 3 in the step 3 to form a flame-retardant layer 4, and then an electron accelerator is adopted to carry out electron irradiation crosslinking processing on the extruded flame-retardant layer 4;
and 8: tightly and spirally winding a copper wire on the flame-retardant layer 4 to form a first shielding layer 5;
and step 9: tightly and spirally winding an aluminum strip on the first shielding layer 5 to form a second shielding layer 6;
step 10: mixing and stirring pepper, mint and camphor, squeezing and juicing, extracting plant liquid, mixing the plant liquid with clear water according to the proportion of 1:2 to obtain insect-proof liquid, selecting crosslinked polyethylene as a raw material of a protective sleeve, and putting the raw material and the insect-proof liquid into a stirrer to be stirred to obtain a raw material of the protective sleeve;
step 11: after the flame-retardant coating raw material is cooled to 65 ℃, extruding and coating the protective raw material on the flame-retardant layer in the step 7 to form a sheath layer 7, thus obtaining the power cable;
step 12: and winding the manufactured cable body into a cable by using a cable cabling machine in a non-back-twist mode, spraying corresponding characters on the cable by using an ink-jet printer in the winding process, drying the ink by using an air heater, detecting the finished product, and warehousing the finished product if the finished product is qualified.
Further, the preparation method of the first insulating layer 2 and the second insulating layer 3 comprises the following steps: adding nano silicon oxide into the epoxy resin adhesive to obtain a system substance; mixing quartz powder and alumina powder to obtain a mixture; and stirring the system substance and the mixture until the system substance and the mixture are uniformly mixed to obtain the insulating raw material.
By adopting the technical scheme, the phenomena of pre-crosslinking during crosslinking and reduction of insulation resistance due to the fact that the insulation layer absorbs moisture in air are prevented, and therefore the insulation resistance value is guaranteed.
Further, before annealing the material in the step 1, vacuumizing is firstly performed in an annealing furnace, and then nitrogen is filled.
By adopting the technical scheme, the copper wire can be prevented from being oxidized in the annealing process, and the service life of the copper wire is prolonged.
Furthermore, in the step 6, the inside of the stirrer is heated to 70 ℃, and the stirring is carried out for 10 minutes at the rotating speed of 450 r/min.
By adopting the technical scheme, the plant liquid can be fully mixed and blended with the crosslinked polyethylene, so that the distribution uniformity of the plant liquid is improved, and the insect and mouse prevention effect is more ideal.
Further, in the step 6, the stirring time of the aluminum hydroxide and the zinc borate is 5 minutes, and the rotating speed is 450 r/min; adding the smoke suppressor, the coupling agent and the stabilizer, and continuing for 10 minutes at the rotating speed of 900 r/min.
By adopting the technical scheme, the raw materials can be fully fused, and the flame-retardant effect of the flame-retardant layer 4 is further improved
Although embodiments of this invention have been shown and described, it is to be understood that such embodiments are merely illustrative of and not restrictive on the broad invention, and that any one or more of the described features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and that modifications, substitutions, and variations that do not materially contribute to the novel teachings of this invention may be made by those skilled in the art after reading this disclosure without departing from the principles and spirit of this invention, but within the scope of the appended claims.

Claims (6)

1. A double-layer high-insulation electric wire comprising a conductor (1), characterized in that: the surface cladding of conductor (1) has first insulation layer (2), the surface cladding of first insulation layer (2) has second insulation layer (3), the surface cladding of second insulation layer (3) has fire-retardant layer (3), the surface of fire-retardant layer (4) has first shielding layer (5) around the package, the surface of first shielding layer (5) has second shielding layer (6) around the package, the surface cladding of second shielding layer (6) has restrictive coating (7).
2. The method for manufacturing a double-layer high-insulation electric wire according to claim 1, wherein: the method comprises the following specific steps:
step 1: putting a copper rod into a metal wire drawing machine at normal temperature for wire drawing treatment, then putting the drawn wire into an annealing furnace, heating to 55-70 ℃, carrying out annealing treatment to obtain a copper monofilament, and then stranding the copper monofilament by using a stranding machine in a stranding mode of concentric compound stranding to form a conductor (1);
step 2: extruding an insulating material on the surface of the conductor by using an extruding machine to form a first insulating layer (2);
and step 3: twisting the conductor with the first insulating layer into a cable core, and extruding a second insulating layer (3) outside the twisted cable core;
and 4, step 4: by adopting a power frequency spark machine, the relation between the test voltage U and the insulation thickness delta is as follows: when delta is less than or equal to 0.4 mm, U is 4 kilovolts;
and 5: performing electron irradiation crosslinking processing on the extruded insulating layer by adopting an electron accelerator;
step 6: putting the phenolic resin, the modified carrageenan and the ethylene-vinyl acetate copolymer into a large stirrer, mixing and stirring for 4-8 minutes, then mixing and stirring aluminum hydroxide and zinc borate, adding a smoke suppressor, a coupling agent and a stabilizer, and continuing stirring at high speed until the temperature reaches 100 ℃ to obtain a flame-retardant coating raw material;
and 7: after the flame-retardant coating raw material is cooled to 60-75 ℃, the flame-retardant coating raw material is extruded and coated on the second insulating layer (3) in the step (3) to form a flame-retardant layer (4), and then an electron accelerator is adopted to carry out electron irradiation crosslinking processing on the extruded flame-retardant layer (4);
and 8: tightly and spirally winding a copper wire on the flame-retardant layer (4) to form a first shielding layer (5);
and step 9: tightly and spirally winding an aluminum strip on the first shielding layer (5) to form a second shielding layer (6);
step 10: mixing and stirring pepper, mint and camphor, squeezing and juicing, extracting plant liquid, mixing the plant liquid with clear water according to the proportion of 1:2 to obtain insect-proof liquid, selecting crosslinked polyethylene as a raw material of a protective sleeve, and putting the raw material and the insect-proof liquid into a stirrer to be stirred to obtain a raw material of the protective sleeve;
step 11: after the flame-retardant coating raw material is cooled to 50-65 ℃, the protective raw material is extruded and coated on the flame-retardant layer in the step 7 to form a sheath layer (7), and the power cable is obtained;
step 12: and winding the manufactured cable body into a cable by using a cable cabling machine in a non-back-twist mode, spraying corresponding characters on the cable by using an ink-jet printer in the winding process, drying the ink by using an air heater, detecting the finished product, and warehousing the finished product if the finished product is qualified.
3. The method for manufacturing a double-layer high-insulation electric wire according to claim 2, wherein: the preparation method of the first insulating layer (2) and the second insulating layer (3) comprises the following steps: adding nano silicon oxide into the epoxy resin adhesive to obtain a system substance; mixing quartz powder and alumina powder to obtain a mixture; and stirring the system substance and the mixture until the system substance and the mixture are uniformly mixed to obtain the insulating raw material.
4. The method for manufacturing a double-layer high-insulation electric wire according to claim 2, wherein: in the step 1, before annealing the material, the annealing furnace is firstly vacuumized, and then nitrogen is filled.
5. The method for manufacturing a double-layer high-insulation electric wire according to claim 2, wherein: in the step 7, the interior of the stirrer is heated to 70-90 ℃, the stirring is carried out for 8-10 minutes, and the rotating speed is 450-.
6. The method for manufacturing a double-layer high-insulation electric wire according to claim 2, wherein: the stirring time of the aluminum hydroxide and the zinc borate in the step 6 is 5-15 minutes, and the rotating speed is 300-450 r/min; after the smoke suppressor, the coupling agent and the stabilizing agent are added, the operation is continued for 10 to 16 minutes at the rotating speed of 700 and 900 r/min.
CN202210509187.2A 2022-05-11 2022-05-11 Double-layer high-insulation electric wire Pending CN114898923A (en)

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CN114898923A true CN114898923A (en) 2022-08-12

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