CN112002472A - Composite multifunctional cable - Google Patents
Composite multifunctional cable Download PDFInfo
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- CN112002472A CN112002472A CN202010882889.6A CN202010882889A CN112002472A CN 112002472 A CN112002472 A CN 112002472A CN 202010882889 A CN202010882889 A CN 202010882889A CN 112002472 A CN112002472 A CN 112002472A
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/04—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
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- 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
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- 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
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- 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
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- 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
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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
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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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
Abstract
The invention discloses a composite multifunctional cable, which comprises an outer layer and a cable core, wherein a filling layer is arranged between the inner wall of the outer layer and the surface of the cable core, the outer layer comprises a sheath, the inner wall of the sheath is bonded with a flame-retardant layer through an adhesive, the inner wall of the flame-retardant layer is bonded with a shielding protective net through the adhesive, the cable core comprises a conductor, and the surface of the conductor is coated with a coating layer. The composite multifunctional cable takes ethylene-vinyl acetate copolymer resin as a main base material to prepare a shielding material for a high-voltage cable, conductive carbon black and modified graphene are used as conductive materials, graphite and the conductive carbon black can generate a synergistic effect to promote the formation of a conductive path, and the flammability of the carbon powder and granite powder is almost zero, so that the composite multifunctional cable has a strong flame-retardant effect, and the flame-retardant effect of the cable outer cladding layer can be greatly improved by matching with expandable graphite powder.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a composite multifunctional cable.
Background
The electric wire and cable are materials used for electric power, electric and related transmission purposes, the electric wire and the cable are not strict in limits, products with small core number, small product diameter and simple structure are generally called electric wires, products without insulation are called bare wires, and other products are called cables; the silicon rubber cable is suitable for fixedly laying power transmission lines or connecting cables for mobile electric appliances with the AC rated voltage of 0.6/1KV or below, has the characteristics of heat radiation resistance, cold resistance, acid and alkali resistance, corrosive gas resistance, water resistance and the like, is soft in cable structure, convenient to radiate, stable in electrical performance in high-temperature (high and cold) environments, outstanding in ageing resistance and long in service life, is widely used in the industries of metallurgy, electric power, petrochemical industry, electronics, automobile manufacturing and the like, is suitable for movably or fixedly laying electric appliance instrument connecting lines or signal transmission lines with the AC rated voltage of 450/750V or below, has better thermal stability, and can maintain good electrical performance and flexibility in high temperature, low temperature and corrosivity, the flat cable is produced by standard organization, is suitable for mobile electrical equipment with the AC rated voltage of 450V/70V or below, is particularly suitable for frequently-bent occasions without kinking, is folded tidily, can meet the requirements of various occasions if traveling, and is suitable for electrical connection among mobile electrical equipment in severe environments such as power generation, metallurgy, chemical engineering, harbors and the like.
The in-process that current cable was using, fire behavior is general, if meet high temperature and can have the potential safety hazard, and traditional cable is only inside copper wire winding, and the outside uses rubber insulation's structure, structure and function singleness are difficult to realize electric power and signal transmission function simultaneously to the phenomenon that the cable crust cracked the deformation in the use appears easily in the cable that adopts this structure, causes signal transmission poor stability.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a composite multifunctional cable, which solves the problem of single function of the existing cable.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a compound multifunctional cable, includes skin and cable core, be provided with the filling layer between the surface of outer inner wall and cable core, it is outer including the sheath, the inner wall of sheath has fire-retardant layer through the adhesive bonding to the inner wall on fire-retardant layer has the shielding protection network through the adhesive bonding, the cable core includes the conductor, the surface coating of conductor has the dope layer to the envelope of conductor has the PVC insulating layer around the package face, the surface of PVC insulating layer is provided with the mica tape, the inner wall of PVC insulating layer and the surface packing that is located the conductor have shielding material.
Preferably, the filler of the filling layer is a basalt fiber filament-doped PP flame-retardant filling rope, and the basalt fiber filament and the PP flame-retardant filling rope have the same outer diameter.
Preferably, the conductor is formed by twisting superfine soft copper monofilaments, and the twisted copper monofilaments are externally braided with copper wires to form a braided conductor.
Preferably, the preparation method of the composite multifunctional cable specifically comprises the following steps:
s1, preparing a cable core: stranding superfine soft copper monofilaments, weaving copper wires outside the stranded copper monofilaments to form a woven conductor, then pretreating the conductor, selecting a proper amount of polyesterimide, a coupling agent, a leveling agent, alpha-Al 2O3, SiO2 and SiC, dissolving the polyesterimide in an organic solvent to prepare a polyesterimide solution, preparing CNT into a CNT dispersion solution, uniformly mixing the polyesterimide solution and the CNT dispersion solution to obtain a mixture, adding the alpha-Al 2O3, the SiO2, the SiC and the leveling agent treated by the coupling agent into the mixture, fully stirring to obtain a mixed coating, uniformly coating the obtained mixed coating on the conductor to obtain a coating layer, selecting a proper amount of polyvinyl chloride, glass fibers, an environment-friendly plasticizer, a filler, a flame retardant, a lubricant and oleamide, mixing in a mode of sequentially adding and stirring, and then forming a PVC insulating layer on the conductor by an extrusion coating process, bonding and laminating the mica paper and the glass fiber cloth gold river after glue application to form a mica tape layer, bonding the mica tape layer on the surface of the PVC insulating layer, adding a proper amount of ethylene-vinyl acetate copolymer resin, low-density polyethylene, ethylene propylene diene monomer, dioctyl terephthalate, a lubricant, graphene modified MQ resin and a cross-linking agent into a torque rheometer, controlling the temperature to be 120-, tabletting under 4-8MPa for 5-10 min, cold pressing under 5-10MPa for 20-60 min, the shielding material can be obtained, and the cable core is manufactured by filling the shielding material between the PVC insulating layer and the conductor;
s2, preparing an outer layer: a shielding protective net woven by thin wires of a copper-aluminum alloy material is prepared by taking natural flake graphite as a material, then putting the natural flake graphite into a reaction container containing hydrogen peroxide solution and concentrated sulfuric acid, stirring at a constant speed, slowly stirring along the same direction to prepare expandable graphite powder, adding ABS resin, polyolefin, nitrile rubber, a compatilizer, half of expandable graphite powder, a high-temperature additive, a flow modifier, an antioxidant and talcum powder into the high-speed stirrer, stirring for 10 minutes after the addition is finished so as to stir and mix uniformly, standing for 10 minutes for later use, then forming a flame-retardant layer on the surface of the shielding protective net by a pack extrusion process, feeding a cable material into an extrusion mixer to mix and extrude a mixed material by adopting a die face air cooling and granulating mode, then cooling the mixed material, feeding the mixed material into a granulator to extrude and granulate, directly granulating the material extruded by the granulator by using an air-cooled die face hot cutter head, extruding and coating, feeding the obtained material particles into a screw feeder, heating and melting, extruding and pushing to a cable extrusion molding head, and molding the surface of the flame-retardant layer into a sheath;
s3, preparation of a filling layer: 5 cable cores are provided, cabling operation is carried out through a cabling process, in the process, basalt fiber yarns and PP flame-retardant filling ropes are added to form a filling layer, and the surface of each cable core is coated with the filling layer;
s4, preparation of a finished product: and coating the outer layer on the surface of the filling layer in an extrusion molding manner to form the cable.
Preferably, in the step S1, the conductor is sequentially treated by dilute hydrochloric acid solution and deionized water while being pretreated, the conductor is subjected to surface treatment in an oxygen-free environment, and the holding temperature of the conductor in the oxygen-free environment is 900-.
Preferably, in step S1, the method for preparing the CNT dispersion includes: putting CNT into glycerol, fully stirring for 2-4h at 30-50 ℃, and then carrying out ultrasonic treatment for 2-4h at 40-60 ℃ to obtain a CNT dispersion liquid of 50g of CNT/100mL of glycerol, wherein the solid content of the polyester imide solution is 20-60%, and the coating layer comprises the following components in parts by weight: 20-30 parts of polyesterimide, 1-6 parts of coupling agent, 1-5 parts of flatting agent, 310-20 parts of alpha-Al 2O, 78-10 parts of SiO 24 and 1-5 parts of SiC, wherein in step S1, the PVC insulating layer is prepared from the following raw materials in parts by weight: 15-30 parts of polyvinyl chloride, 10-20 parts of glass fiber, 5-15 parts of environment-friendly plasticizer, 5-8 parts of filler, 2-6 parts of flame retardant, 1-3 parts of lubricant and 1-2 parts of oleamide.
Preferably, in step S3, the flame retardant layer is prepared from the following raw materials in parts by weight: 20-30 parts of natural crystalline flake graphite, 15-25 parts of ABS resin, 10-20 parts of polyolefin, 15-25 parts of nitrile rubber, 10-15 parts of compatilizer, 5-10 parts of high-temperature additive, 5-10 parts of flow modifier, 10-15 parts of antioxidant, 15-20 parts of talcum powder, 15-25 parts of carbon powder and 15-25 parts of granite powder, wherein the sheath is prepared from the following raw materials in parts by weight: 40-50 parts of PVC resin; 26-38 parts of a plasticizer; 3-6 parts of a stabilizer; 45-82 parts of a filling agent; 0.3-0.8 part of lubricant, 4-8 parts of toughening agent, dimethyl terephthalate as plasticizer, calcium-zinc composite stabilizer as stabilizer, calcium carbonate and/or kaolin as filler, oxidized polyethylene paraffin as lubricant and chlorinated polyethylene as toughening agent.
Advantageous effects
The invention provides a composite multifunctional cable. Compared with the prior art, the method has the following beneficial effects:
(1) the composite multifunctional cable is characterized in that a filling layer is arranged between the inner wall of the outer layer and the surface of the cable core, the outer layer comprises a sheath, the inner wall of the sheath is bonded with a flame-retardant layer through an adhesive, and the inner wall of the flame-retardant layer is bonded with a shielding protective net through an adhesive, the cable core comprises a conductor, the surface of the conductor is coated with a coating layer, and the wrapping surface of the conductor is wrapped with a PVC insulating layer, the surface of the PVC insulating layer is provided with a mica tape, the inner wall of the PVC insulating layer and the surface of the conductor are filled with shielding materials, the shielding material for high-voltage cable is prepared by taking ethylene-vinyl acetate copolymer resin as a main base material, in addition, the conductive carbon black and the modified graphene are used as conductive materials, and the graphite and the conductive carbon black can generate a synergistic effect, so that the formation of a conductive path is promoted, and the electrical property of the shielding material is greatly improved.
(2) The composite multifunctional cable is prepared by taking natural crystalline flake graphite as a material, putting the natural crystalline flake graphite into a reaction vessel containing hydrogen peroxide solution and concentrated sulfuric acid, stirring at a constant speed, and slowly stirring along the same direction, so as to prepare expandable graphite powder, adding ABS resin, polyolefin, nitrile rubber, compatilizer, half of expandable graphite powder, high-temperature additive, flow modifier, antioxidant and talcum powder into a high-speed stirrer, then adding carbon powder and granite powder, stirring for 10 minutes regularly after the addition is finished so as to uniformly stir and mix, standing for 10 minutes for later use, then a flame-retardant layer is formed on the surface of the shielding protective net by an extrusion coating process, the flammability of the adopted carbon powder and granite powder is almost zero, therefore, the flame retardant effect is stronger, and the flame retardant effect of the cable outer cladding layer can be greatly improved by matching with the expandable graphite powder.
Drawings
FIG. 1 is a perspective view of the structure of the present invention;
FIG. 2 is a side view of the structure of the present invention;
FIG. 3 is a schematic structural view of an outer layer of the present invention;
figure 4 is a schematic structural diagram of the cable core of the present invention.
In the figure: 1-outer layer, 11-sheath, 12-flame retardant layer, 13-shielding protective net, 2-cable core, 21-conductor, 22-coating layer, 23-PVC insulating layer, 24-mica tape, 25-shielding material and 3-filling layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides three technical solutions: the utility model provides a compound multifunctional cable, including outer 1 and cable core 2, be provided with filling layer 3 between the inner wall of outer 1 and the surface of cable core 2, outer 1 includes sheath 11, the inner wall of sheath 11 has fire-retardant layer 12 through the adhesive bonding, and the inner wall of fire-retardant layer 12 has shielding protection net 13 through the adhesive bonding, cable core 2 includes conductor 21, the surface coating of conductor 21 has dope layer 22, and the envelope of conductor 21 has PVC insulating layer 23 around the package, the surface of PVC insulating layer 23 is provided with mica tape 24, the inner wall of PVC insulating layer 23 and the surface packing that is located conductor 21 have shielding material 25.
In the invention, the filler of the filling layer 3 is a basalt fiber filament-doped PP flame-retardant filling rope, and the basalt fiber filament and the PP flame-retardant filling rope have the same outer diameter.
In the invention, the conductor 21 is formed by twisting superfine soft copper monofilaments, and the twisted copper monofilaments are externally braided with copper wires to form a braided conductor.
And those not described in detail in this specification are well within the skill of those in the art.
The preparation method of the composite multifunctional cable specifically comprises the following embodiments:
example 1
S1, preparation of the cable core 2: stranding ultrafine soft copper monofilaments, weaving copper wires outside the stranded copper monofilaments to form a woven conductor 21, then pretreating the conductor 21, dissolving polyesterimide in an organic solvent to prepare a polyesterimide solution, preparing CNT into a CNT dispersion solution, uniformly mixing the polyesterimide solution and the CNT dispersion solution to obtain a mixture, adding alpha-Al 2O3, SiO2, SiC and the flatting agent treated by the coupling agent into the mixture, fully stirring to obtain a mixed coating, uniformly coating the obtained mixed coating on the conductor 21 to obtain a coating layer 22, selecting 23 parts of polyvinyl chloride, 15 parts of glass fibers, 10 parts of an environment-friendly plasticizer, 6 parts of a filler, 4 parts of a flame retardant, 2 parts of a lubricant and 1.5 parts of oleamide, mixing by sequentially adding and stirring, then forming a PVC insulating layer 23 on the conductor 21 by an extrusion coating process, bonding and laminating mica paper and the glass fiber cloth gold river after glue application to form a mica tape layer 24, bonding the mica tape layer 24 on the surface of the PVC insulating layer 23, selecting a proper amount of ethylene-vinyl acetate copolymer resin, low-density polyethylene, ethylene propylene diene monomer, dioctyl terephthalate, a lubricant, graphene modified MQ resin and a cross-linking agent, adding the mixture into a torque rheometer, controlling the temperature to be 135 ℃, mixing for 17 minutes at the mixing rotating speed of 75 r/min, putting the obtained material into a flat vulcanizing agent, controlling the temperature to be 120 ℃, tabletting under the pressure of 6MPa for 7 minutes, cold-pressing under the pressure of 7MPa for 40 minutes after the completion, the shielding material 25 can be obtained, and the cable core 2 is manufactured by filling the shielding material 25 between the PVC insulating layer 23 and the conductor 21;
s2, preparation of an outer layer 1: a shielding protective net 13 woven by thin wires of a copper-aluminum alloy material is adopted, firstly, 25 parts of natural crystalline flake graphite is taken as a material, then, the natural crystalline flake material is put into a reaction container containing hydrogen peroxide solution and concentrated sulfuric acid, the mixture is stirred at a constant speed and is slowly stirred along the same direction to prepare expandable graphite powder, 20 parts of ABS resin, 15 parts of polyolefin, 20 parts of nitrile rubber, 12 parts of compatilizer, one half of expandable graphite powder, 7 parts of high-temperature additive, 7 parts of flow modifier, 12 parts of antioxidant and 17 parts of talcum powder are added into a high-speed stirrer, the mixture is stirred for 10 minutes after the addition is finished, so that the mixture is stirred and mixed uniformly and stands for 10 minutes, then, a flame-retardant layer 12 is formed on the surface of the shielding protective net 13 through an extrusion coating process, a die face air cooling and grain cutting mode is adopted, feeding the cable material into an extrusion mixer to mix and extrude a mixture, cooling the mixture, feeding the mixture into a granulator to extrude and granulate, directly granulating the material extruded by the granulator through an air-cooled die face hot cutting machine head, extruding and coating, feeding the obtained material particles into a screw feeder to heat and melt, extruding and pushing the material particles to a cable extrusion molding head, and molding the material particles into a sheath 11 on the surface of a flame-retardant layer 12;
s3, preparation of a filling layer 3: 5 cable cores 2 are provided, cabling operation is carried out through a cabling process, in the process, basalt fiber yarns and PP flame-retardant filling ropes are added to form a filling layer 3, and the filling layer 3 is coated on the surface of the cable cores 2;
s4, preparation of a finished product: and coating the outer layer 1 on the surface of the filling layer 3 by an extrusion molding mode to form the cable.
Example 2
S1, preparation of the cable core 2: stranding ultrafine soft copper monofilaments, weaving copper wires outside the stranded copper monofilaments to form a woven conductor 21, then pretreating the conductor 21, dissolving 20 parts of polyesterimide, 1 part of coupling agent, 1 part of flatting agent, 10 parts of alpha-Al 2O3, 4 parts of SiO2 and 1 part of SiC in an organic solvent to prepare polyesterimide solution, preparing CNT into CNT dispersion liquid, uniformly mixing the polyesterimide solution and the CNT dispersion liquid to obtain a mixture, adding the alpha-Al 2O3, the SiO2, the SiC and the flatting agent treated by the coupling agent into the mixture, fully stirring to obtain mixed paint, uniformly coating the obtained mixed paint on the conductor 21 to obtain a paint layer 22, selecting 15 parts of polyvinyl chloride, 10 parts of glass fibers, 5 parts of environment-friendly plasticizer, 5 parts of filler, 2 parts of flame retardant, 1 part of lubricant and 1 part of oleamide, mixing by sequentially adding and stirring, then forming a PVC insulating layer 23 on the conductor 21 by an extrusion coating process, bonding and laminating mica paper and the glass fiber cloth gold river after glue application to form a mica tape layer 24, bonding the mica tape layer 24 on the surface of the PVC insulating layer 23, selecting a proper amount of ethylene-vinyl acetate copolymer resin, low-density polyethylene, ethylene propylene diene monomer, dioctyl terephthalate, a lubricant, graphene modified MQ resin and a cross-linking agent, adding the mixture into a torque rheometer, controlling the temperature to be 120 ℃, mixing for 10 minutes at the mixing rotating speed of 50 r/min, putting the obtained material into a flat vulcanizing agent, controlling the temperature to be 110 ℃, tabletting under the pressure of 4MPa for 5 minutes, cold-pressing under the pressure of 5MPa for 20 minutes after the tabletting is finished, the shielding material 25 can be obtained, and the cable core 2 is manufactured by filling the shielding material 25 between the PVC insulating layer 23 and the conductor 21;
s2, preparation of an outer layer 1: a shielding protective net 13 woven by thin wires of a copper-aluminum alloy material is adopted, firstly, 20 parts of natural crystalline flake graphite is taken as a material, then, the natural crystalline flake material is put into a reaction container containing hydrogen peroxide solution and concentrated sulfuric acid, the mixture is stirred at a constant speed and is slowly stirred along the same direction to prepare expandable graphite powder, 15 parts of ABS resin, 10 parts of polyolefin, 15 parts of nitrile rubber, 10 parts of compatilizer, one half of expandable graphite powder, 5 parts of high-temperature additive, 5 parts of flow modifier, 10 parts of antioxidant and 15 parts of talcum powder are added into a high-speed stirrer, the mixture is stirred for 10 minutes after the addition is finished, the stirring and the mixing are uniform, the mixture is kept stand for 10 minutes for standby, then, a flame-retardant layer 12 is formed on the surface of the shielding protective net 13 through an extrusion coating process, a die face air cooling and grain cutting mode is adopted, feeding the cable material into an extrusion mixer to mix and extrude a mixture, cooling the mixture, feeding the mixture into a granulator to extrude and granulate, directly granulating the material extruded by the granulator through an air-cooled die face hot cutting machine head, extruding and coating, feeding the obtained material particles into a screw feeder to heat and melt, extruding and pushing the material particles to a cable extrusion molding head, and molding the material particles into a sheath 11 on the surface of a flame-retardant layer 12;
s3, preparation of a filling layer 3: 5 cable cores 2 are provided, cabling operation is carried out through a cabling process, in the process, basalt fiber yarns and PP flame-retardant filling ropes are added to form a filling layer 3, and the filling layer 3 is coated on the surface of the cable cores 2;
s4, preparation of a finished product: and coating the outer layer 1 on the surface of the filling layer 3 by an extrusion molding mode to form the cable.
Example 3
S1, preparation of the cable core 2: stranding ultrafine soft copper monofilaments, weaving copper wires outside the stranded copper monofilaments to form a woven conductor 21, then pretreating the conductor 21, dissolving polyesterimide in an organic solvent to prepare a polyesterimide solution, preparing CNT into a CNT dispersion solution, uniformly mixing the polyesterimide solution and the CNT dispersion solution to obtain a mixture, adding alpha-Al 2O3, SiO2, SiC and a flatting agent treated by a coupling agent into the mixture, fully stirring to obtain a mixed coating, uniformly coating the obtained mixed coating on the conductor 21 to obtain a coating layer 22, selecting 30 parts of polyvinyl chloride, 20 parts of glass fibers, 14 parts of an environment-friendly plasticizer, 8 parts of a filler, 6 parts of a flame retardant, 2 parts of a lubricant and 2 parts of oleamide, mixing by sequentially adding and stirring, then forming a PVC insulating layer 23 on the conductor 21 by an extrusion coating process, bonding and laminating mica paper and the glass fiber cloth gold river after glue application to form a mica tape layer 24, bonding the mica tape layer 24 on the surface of the PVC insulating layer 23, selecting a proper amount of ethylene-vinyl acetate copolymer resin, low-density polyethylene, ethylene propylene diene monomer, dioctyl terephthalate, a lubricant, graphene modified MQ resin and a cross-linking agent, adding the mixture into a torque rheometer, controlling the temperature to be 150 ℃, mixing for 25 minutes at the mixing rotating speed of 100 r/min, putting the obtained material into a flat vulcanizing agent, controlling the temperature to be 130 ℃, tabletting under the pressure of 8MPa for 10 minutes, cold-pressing under the pressure of 10MPa for 60 minutes after the tabletting is finished, the shielding material 25 can be obtained, and the cable core 2 is manufactured by filling the shielding material 25 between the PVC insulating layer 23 and the conductor 21;
s2, preparation of an outer layer 1: a shielding protective net 13 woven by thin wires of a copper-aluminum alloy material is adopted, firstly, 30 parts of natural crystalline flake graphite is taken as a material, then, the natural crystalline flake material is put into a reaction container containing hydrogen peroxide solution and concentrated sulfuric acid, the mixture is stirred at a constant speed and is slowly stirred along the same direction, so that expandable graphite powder is prepared, 25 parts of ABS resin, 20 parts of polyolefin, 25 parts of nitrile rubber, 15 parts of compatilizer, one half of expandable graphite powder, 10 parts of high-temperature additive, 10 parts of flow modifier, 15 parts of antioxidant and 20 parts of talcum powder are added into a high-speed stirrer, the mixture is stirred for 10 minutes after the addition is finished, so that the mixture is stirred and mixed uniformly and stands for 10 minutes for standby, then, a flame-retardant layer 12 is formed on the surface of the shielding protective net 13 through an extrusion coating process, a die face air cooling and grain cutting mode is adopted, feeding the cable material into an extrusion mixer to mix and extrude a mixture, cooling the mixture, feeding the mixture into a granulator to extrude and granulate, directly granulating the material extruded by the granulator through an air-cooled die face hot cutting machine head, extruding and coating, feeding the obtained material particles into a screw feeder to heat and melt, extruding and pushing the material particles to a cable extrusion molding head, and molding the material particles into a sheath 11 on the surface of a flame-retardant layer 12;
s3, preparation of a filling layer 3: 5 cable cores 2 are provided, cabling operation is carried out through a cabling process, in the process, basalt fiber yarns and PP flame-retardant filling ropes are added to form a filling layer 3, and the filling layer 3 is coated on the surface of the cable cores 2;
s4, preparation of a finished product: and coating the outer layer 1 on the surface of the filling layer 3 by an extrusion molding mode to form the cable.
The working principle is as follows: the shielding material for the high-voltage cable is prepared by taking ethylene-vinyl acetate copolymer resin as a main base material, the conductive carbon black and the modified graphene are adopted as the conductive material, the graphite and the conductive carbon black can generate a synergistic effect to promote the formation of a conductive path, the electrical property of the shielding material is greatly improved, the flammability of the adopted carbon powder and granite powder is almost zero, therefore, the flame-retardant effect is strong, and the flame-retardant effect of the cable outer cladding layer can be greatly improved by matching with the expandable graphite powder
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a compound multifunctional cable, includes skin (1) and cable core (2), its characterized in that: be provided with between the surface of the inner wall of skin (1) and cable core (2) filling layer (3), outer (1) is including sheath (11), the inner wall of sheath (11) has fire-retardant layer (12) through the adhesive bonding to the inner wall of fire-retardant layer (12) has shielding protection network (13) through the adhesive bonding, cable core (2) is including conductor (21), the surface coating of conductor (21) has dope layer (22) to the envelope of conductor (21) has PVC insulating layer (23) around the package, the surface of PVC insulating layer (23) is provided with mica tape (24), the surface packing that the inner wall of PVC insulating layer (23) just is located conductor (21) has shielding material (25).
2. A composite multifunctional cable according to claim 1, characterized in that: the filler of the filling layer (3) is a basalt fiber filament-doped PP flame-retardant filling rope, and the basalt fiber filament and the PP flame-retardant filling rope have the same outer diameter.
3. A composite multifunctional cable according to claim 1, characterized in that: the conductor (21) is formed by twisting superfine soft copper monofilaments, and copper wires are braided outside the twisted copper monofilaments to form a braided conductor.
4. A composite multifunctional cable according to any one of claims 1 to 3, characterized in that: the preparation method specifically comprises the following steps:
s1, preparing the cable core (2): stranding ultrafine soft copper monofilaments, weaving copper wires outside the stranded copper monofilaments to form a woven conductor (21), then pretreating the conductor (21), selecting a proper amount of polyesterimide, a coupling agent, a flatting agent, alpha-Al 2O3, SiO2 and SiC, dissolving the polyesterimide in an organic solvent to prepare a polyesterimide solution, preparing CNT into a CNT dispersion solution, uniformly mixing the polyesterimide solution and the CNT dispersion solution to obtain a mixture, adding the alpha-Al 2O3, the SiO2, the SiC and the flatting agent treated by the coupling agent into the mixture, fully stirring to obtain a mixed coating, uniformly coating the obtained mixed coating on the conductor (21) to obtain a coating layer (22), selecting a proper amount of polyvinyl chloride, glass fibers, an environment-friendly plasticizer, a filler, a flame retardant, a lubricant and oleamide, mixing in a sequential adding and stirring manner, and then forming a PVC insulating layer (23) on the conductor (21) by an extrusion coating process, bonding and laminating the mica paper and the glass fiber cloth gold river after glue application to form a mica tape layer (24), bonding the mica tape layer (24) on the surface of the PVC insulating layer (23), selecting a proper amount of ethylene-vinyl acetate copolymer resin, low-density polyethylene, ethylene propylene diene monomer, dioctyl terephthalate, a lubricant, graphene modified MQ resin and a cross-linking agent, adding into a torque rheometer, controlling the temperature to be 120-, tabletting under 4-8MPa for 5-10 min, cold pressing under 5-10MPa for 20-60 min, thus obtaining the shielding material (25), and filling the shielding material (25) between the PVC insulating layer (23) and the conductor (21) to prepare the cable core (2);
s2, preparation of an outer layer (1): a shielding protective net (13) woven by thin wires of copper-aluminum alloy materials is adopted, natural flake graphite is taken as a material, then the natural flake graphite is put into a reaction container containing hydrogen peroxide solution and concentrated sulfuric acid, the mixture is stirred at a constant speed and is slowly stirred along the same direction to prepare expandable graphite powder, ABS resin, polyolefin, nitrile rubber, compatilizer, half of expandable graphite powder, high-temperature additive, flow modifier, antioxidant and talcum powder are added into the high-speed stirrer, the mixture is stirred for 10 minutes at regular time after the addition is finished, so that the mixture is uniformly stirred and mixed and stands for 10 minutes for later use, then a flame-retardant layer (12) is formed on the surface of the shielding protective net (13) through a package process, a die face air cooling and grain cutting mode is adopted, cable materials are firstly sent into an extrusion mixer to be mixed and extruded to obtain a mixture, then the mixture is cooled and then sent into a granulator for extrusion granulation, the material extruded by the granulator is directly granulated and extruded and coated by an air-cooled die face hot cutting machine head, the obtained material particles are sent into a screw feeder for heating and melting, extruded and pushed to a cable extrusion molding head, and a sheath (11) is molded on the surface of the flame-retardant layer (12);
s3, preparation of the filling layer (3): 5 cable cores (2) are subjected to cabling operation through a cabling process, in the process, basalt fiber yarns and PP flame-retardant filling ropes are added to form a filling layer (3), and the filling layer (3) is coated on the surface of the cable cores (2);
s4, preparation of a finished product: and coating the outer layer (1) on the surface of the filling layer (3) in an extrusion molding manner to form the cable.
5. The composite multifunctional cable of claim 4, wherein: in step S1, the conductor (21) is sequentially treated with dilute hydrochloric acid solution and deionized water while being pretreated, the conductor (21) is subjected to surface treatment in an oxygen-free environment, and the temperature of the conductor (21) is maintained at 900-1000 ℃ in the oxygen-free environment.
6. The composite multifunctional cable of claim 4, wherein: in the step S1, the method for preparing the CNT dispersion includes: putting CNT into glycerol, fully stirring for 2-4h at 30-50 ℃, and then carrying out ultrasonic treatment for 2-4h at 40-60 ℃ to obtain a CNT dispersion liquid of 50g of CNT/100mL of glycerol, wherein the solid content of the polyester imide solution is 20-60%, and the coating layer (22) comprises the following components in parts by weight: 20-30 parts of polyesterimide, 1-6 parts of coupling agent, 1-5 parts of flatting agent, 310-20 parts of alpha-Al 2O, 78-10 parts of SiO 24 and 1-5 parts of SiC, wherein in step S1, the PVC insulating layer (23) is prepared from the following raw materials in parts by weight: 15-30 parts of polyvinyl chloride, 10-20 parts of glass fiber, 5-15 parts of environment-friendly plasticizer, 5-8 parts of filler, 2-6 parts of flame retardant, 1-3 parts of lubricant and 1-2 parts of oleamide.
7. The composite multifunctional cable of claim 4, wherein: in the step S3, the flame retardant layer (12) is prepared from the following raw materials in parts by weight: 20-30 parts of natural crystalline flake graphite, 15-25 parts of ABS resin, 10-20 parts of polyolefin, 15-25 parts of nitrile rubber, 10-15 parts of compatilizer, 5-10 parts of high-temperature additive, 5-10 parts of flow modifier, 10-15 parts of antioxidant, 15-20 parts of talcum powder, 15-25 parts of carbon powder and 15-25 parts of granite powder, wherein the sheath (11) is prepared from the following raw materials in parts by weight: 40-50 parts of PVC resin; 26-38 parts of a plasticizer; 3-6 parts of a stabilizer; 45-82 parts of a filling agent; 0.3-0.8 part of lubricant, 4-8 parts of toughening agent, dimethyl terephthalate as plasticizer, calcium-zinc composite stabilizer as stabilizer, calcium carbonate and/or kaolin as filler, oxidized polyethylene paraffin as lubricant and chlorinated polyethylene as toughening agent.
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Application publication date: 20201127 |