CN109192354B - Enameled wire with high conductivity and preparation method thereof - Google Patents

Enameled wire with high conductivity and preparation method thereof Download PDF

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Publication number
CN109192354B
CN109192354B CN201811127842.8A CN201811127842A CN109192354B CN 109192354 B CN109192354 B CN 109192354B CN 201811127842 A CN201811127842 A CN 201811127842A CN 109192354 B CN109192354 B CN 109192354B
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copper alloy
nano silver
layer
alloy core
enameled wire
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CN109192354A (en
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彭燕
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NINGBO XIN JIAN NEW MATERIAL TECHNOLOGY Co.,Ltd.
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Ningbo Xin Jian New Material Technology Co ltd
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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
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/026—Alloys based on copper
    • 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
    • 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
    • H01B7/0009—Details relating to the conductive cores
    • 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
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0225—Three or more layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0291—Disposition of insulation comprising two or more layers of insulation having different electrical properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat

Abstract

The invention discloses an enameled wire with high conductivity, which comprises a conductive core layer, wherein a tensile fiber layer is arranged on the surface of the conductive core layer, a tinned layer is arranged on the surface of the tensile fiber layer, an insulating paint layer is arranged on the surface of the tinned layer, the conductive core layer comprises a nano silver-copper alloy core, an inorganic insulating microparticle layer is arranged on the surface of the nano silver-copper alloy core, and the tensile fiber layer is spirally wound on the surface of the inorganic insulating microparticle layer in a staggered manner along the forward and reverse directions by a plurality of carbon fiber wires. Also has extremely high heat resistance.

Description

Enameled wire with high conductivity and preparation method thereof
Technical Field
The invention relates to the technical field of enameled wire conduction, in particular to an enameled wire with high conductivity and a preparation method thereof.
Background
The enameled wire is an important accessory of electrical equipment, is composed of a conductor and a plurality of layers of insulating paint coated on the conductor, brings wide market prospect to the enameled wire with continuous and rapid development of the social power industry, and has higher requirement on the enameled wire, the traditional enameled wire mainly comprises a copper wire body and a paint layer, the enamel wire of such a structure is generally too simple in structure to take the influence of environmental factors into consideration, and in some special fields, generally during installation and practical use, more or less enameled wires need to be bent and pulled, and if a large-scale product is manufactured by using the enameled wires, the phenomenon of equipment desensitization, short circuit and the like can be caused by the bending condition of the wire body, the large-scale structural product is complex in structure, time and labor are consumed in the dismounting and maintenance process, and the damaged enameled wire can bring serious consequences.
The invention discloses an insulated composite aluminum enameled wire with the application number of 201410465691.2, which is mainly designed by combining a conductor, a composite paint film layer, a teflon belting and a nylon modified glass fiber layer, has the advantages of easily available raw materials and simple operation, can be prepared on general equipment relative to an extruded teflon enameled wire without specially adding a high-temperature extruder, is easy to industrialize, has high insulated voltage of three-layer insulated enameled wires, can save an insulated adhesive tape and an insulated interlayer due to superior wear resistance of the composite nylon of an outer sheath, provides possibility for high-speed automatic winding, has high insulated voltage, can save the insulated adhesive tape and the insulated interlayer, adopts three-layer insulated protection, and has no pinhole phenomenon.
However, for precision equipment with extremely high requirements on the conductivity, the conductivity is increased by means of alloy silver wires, but various elements such as palladium, gold, nickel, platinum and the like are required to be added, the manufacturing process is complex, and the cost is high.
Disclosure of Invention
In order to overcome the defects of the prior art scheme, the invention provides the enameled wire with high conductivity and the preparation method thereof, the nano silver-copper alloy is obtained as the conductive core layer by combining silver and copper through common elements of the enameled wire, the conductive core layer has the conductivity far higher than that of the copper core enameled wire and higher stability, the problem of a silver coating layer can be well solved by an inorganic insulating micro-particle layer formed on the surface of the nano silver-copper alloy core, and the nano silver-copper alloy core can be coated to play an insulating role, have extremely high heat resistance and effectively solve the problems provided by the background technology.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a high-conductivity enameled wire, includes electrically conductive sandwich layer the surface of electrically conductive sandwich layer is equipped with tensile fibrous layer surface is equipped with the tin coating surface is equipped with the insulating paint layer, electrically conductive sandwich layer includes nanometer silver-copper alloy core the surface of nanometer silver-copper alloy core is equipped with inorganic insulating micro-grained layer, tensile fibrous layer is by the crisscross spiral winding of a plurality of carbon fiber silk in the same direction as the contrary direction on the surface of inorganic insulating micro-grained layer.
Preferably, the preparation method of the nano silver-copper alloy core comprises the following steps:
step 100, hermetically installing a conductive glass plate and a silver plate at two ends of a horizontally placed glass tube, wherein the conductive glass plate is used as a cathode, and the silver plate is used as an anode;
step 200, preparing electrolyte, and adding the electrolyte into a glass tube;
step 300, setting the deposition potential between the conductive glass plate and the silver plate to be-1.2V, and depositing at room temperature to obtain a nano silver-copper alloy;
and step 400, smelting, rolling and stretching the nano silver-copper alloy to obtain the nano silver-copper alloy core in the required shape.
Preferably, the glass pipe is by trunk line and encircle a plurality of deposit pipes of setting on the trunk line surface, the trunk line with deposit pipe intercommunication and integrated into one piece, the diameter of deposit pipe is 0.5 ~ 1.5 mm.
Preferably, a magnetic stirrer is placed in the glass tube, and is slowly stirred in a magnetic stirring mode in the deposition process, wherein the rotating speed is 20-40 r/min.
Preferably, the preparation of the electrolyte: 30ml of secondary deionized water was added to the beaker followed by 0.0185g of silver nitrate and 0.0125g of Cu (NO)3).3H2And O, stirring uniformly by using a glass rod.
Preferably, the inorganic insulating fine particle layer is formed on the surface of the nano silver-copper alloy core, and when the nano silver-copper alloy core is subjected to fusion rolling and stretching forming, the inner surface of the forming groove is set to be a slightly rough structure, and a silica fine particle layer is attached to the inner surface of the forming groove, and when the nano silver-copper alloy core is cooled, the nano silver-copper alloy core is formed on the surface of the forming groove, and then the inorganic insulating fine particle layer is formed by coating an insulating material.
In addition, the invention also designs a preparation method of the enameled wire with high conductivity, which comprises the following steps:
step 100, obtaining a nano silver-copper alloy through electrolysis, smelting, and obtaining a nano silver-copper alloy core with a required specification through rolling and stretching processes;
step 200, quenching the nano silver-copper alloy core, and introducing deionized water to rapidly cool after the nano silver-copper alloy core reaches the quenching temperature;
step 300, cooling the nano silver-copper alloy core, putting the cooled nano silver-copper alloy core into tempering equipment, heating and preserving heat, and naturally cooling to normal temperature;
400, sequentially coating a tensile fiber layer and a tin coating layer, and then conveying the coated fiber layer and the tin coating layer into a painting machine to be painted with an insulating paint layer;
preferably, the quenching treatment process in the step 200 is performed through a dedicated quenching device, and comprises a constant-temperature oven, wherein a plurality of infrared heating pipes are arranged on the inner wall of the constant-temperature oven, a steering wheel for changing the traction direction of the nano silver-copper alloy core is further installed in the constant-temperature oven, a cooling water tank is arranged at the bottom of the constant-temperature oven, an oxygen-free connecting pipe is arranged between the cooling water tank and the constant-temperature oven, and the oxygen-free connecting pipe is fixedly installed on the lower bottom surface of the constant-temperature oven.
Preferably, the tempering equipment in step 300 includes a tempering furnace, a heat dissipation water tank is arranged at the bottom of the tempering furnace, heat dissipation liquid is filled in the heat dissipation water tank, a cooling chamber is further fixedly installed in the heat dissipation water tank, the bottom of the cooling chamber is immersed in the heat dissipation liquid, and a plurality of transfer wheels are fixedly installed in the cooling chamber.
Preferably, the painting machine in step 400 includes the stoving case, stoving bottom of the case portion is equipped with the groove of painting, a plurality of synchronizing wheel is all installed to the bottom of the groove of painting and the incasement top of stoving, and is located the synchronizing wheel of stoving incasement and is connected with first motor through chain drive, and the synchronizing wheel that is located the inslot of painting is connected with the second motor through chain drive.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the nano silver-copper alloy is obtained as the conductive core layer by combining the common elements of the enameled wire, silver and copper, so that the enameled wire has a conductivity far higher than that of the copper core enameled wire and higher stability, an inorganic insulating micro-particle layer formed on the surface of the nano silver-copper alloy core can well solve the problems of a silver coating layer, and the nano silver-copper alloy core can be coated to play an insulating role and also has extremely high heat resistance.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the enamel layer of the present invention;
FIG. 3 is a schematic structural diagram of an integrated quenching, tempering, varnishing and drying apparatus in the process of preparing the enameled wire of the present invention.
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.
Example 1:
as shown in fig. 1, the invention provides a high-conductivity enameled wire, which includes a conductive core layer 1, wherein a tensile fiber layer 2 is arranged on the surface of the conductive core layer 1, a tin-plated layer 3 is arranged on the surface of the tensile fiber layer 2, an insulating paint layer 4 is arranged on the surface of the tin-plated layer 3, the conductive core layer 1 includes a nano silver-copper alloy core 101, an inorganic insulating micro-particle layer 102 is arranged on the surface of the nano silver-copper alloy core 101, and the tensile fiber layer 2 is formed by spirally winding a plurality of carbon fiber wires on the surface of the inorganic insulating micro-particle layer 102 in a staggered manner in the forward and reverse directions.
In the embodiment, the conductivity is mainly improved, and aiming at precise equipment with extremely high requirements on the conductivity, in the prior art, the conductivity is improved by an alloy silver wire, but various elements such as palladium, gold, nickel, platinum and the like are required to be added, the manufacturing process is relatively complex, the cost is relatively high, the invention obtains a nano silver-copper alloy as a conductive core layer by combining common elements of the enameled wire, silver and copper, so that the nano silver-copper alloy has the conductivity far higher than that of a copper core enameled wire and higher stability, and compared with a mode of improving the conductivity by a silver plating mode, the method can solve the problems of silver-plated copper wires as follows:
the silver coating of the silver-coated copper wire is easy to chemically react with substances such as hydrogen sulfide in the air, so that the silver coating becomes dark and black to generate products such as silver sulfide, and the like.
The nano silver-copper alloy core 101 has high conductivity, various excellent physical properties and chemical properties, and a nano effect, which is a performance incomparable with the existing copper-clad aluminum wires and silver-plated copper wires.
The inorganic insulating micro-particle layer 102 is formed on the surface of the nano silver-copper alloy core 101, because the melting point of the silica particles is higher than that of the nano silver-copper alloy, when the nano silver-copper alloy core 101 is melted, rolled and stretched, the inner surface of the forming groove is set to be a slightly rough structure, and the silica micro-particle layer is attached, the nano silver-copper alloy core 101 is formed on the surface of the forming groove when being cooled, and then the inorganic insulating micro-particle layer 102 is formed by coating an insulating material, and the inorganic insulating micro-particle layer 102 formed on the surface of the nano silver-copper alloy core 101 in the mode can well solve the problem of silver plating, and the nano silver-copper alloy core 101 can be coated to play an insulating role and have extremely high heat resistance.
The preparation method of the nano silver-copper alloy core 101 comprises the following steps:
100, hermetically installing a conductive glass plate and a silver plate at two ends of a horizontally placed glass tube, placing a magnetic stirrer in the glass tube by taking the conductive glass plate as a cathode and the silver plate as an anode, and slowly stirring in a magnetic stirring manner in a deposition process at a rotating speed of 20-40 r/min;
200, preparing electrolyte, namely adding the electrolyte into a glass tube, wherein the glass tube comprises a main pipeline and a plurality of deposition tubes arranged on the surface of the main pipeline in a surrounding mode, the main pipeline is communicated with the deposition tubes and is integrally formed, the diameters of the deposition tubes are 0.5-1.5 mm, and the deposition tubes are distributed close to the same side of the main pipeline;
the electrolyte is in whole main pipeline and sedimentation pipe, in the use, will have the sedimentation pipe one side to be the below.
Step 300, setting the deposition potential between the conductive glass plate and the silver plate to be-1.2V, and depositing at room temperature to obtain a nano silver-copper alloy;
during electrolytic deposition, the deposited nano silver-copper alloy can be concentrated in the deposition tube, so that the influence of the stirring of the nano silver-copper alloy caused by magnetic stirring of the electrolyte in the glass tube on the continuous electrolysis can be reduced.
And step 400, smelting, rolling and stretching the nano silver-copper alloy to obtain the nano silver-copper alloy core in the required shape.
Preparing an electrolyte: 30ml of secondary deionized water was added to the beaker followed by 0.0185g of silver nitrate and 0.0125g of Cu (NO)3).3H2And O, stirring uniformly by using a glass rod.
As shown in fig. 2, the insulating paint layer 4 includes a polyurethane fiber paint coating 41, a polyamide-imide paint coating 42, a polyester resin fiber paint coating 43, an aramid fiber woven layer 44 and a mica tape wrapping layer 45, which are sequentially disposed, and the polyurethane fiber paint coating 41 is coated on the tin-plated layer 3.
In this embodiment, a polyurethane fiber paint coating, a polyamide-imide paint coating and a polyester resin fiber paint coating are mainly used as the insulating part, and compared with the existing common polyurethane or polyester resin material as the insulating part, the polyamide-imide paint coating is mainly used as the intermediate layer of the insulating part, and the polyamide-imide paint coating is used as the intermediate layer of the insulating part, and the aromatic heterocyclic group with heat resistance and the amide group with flexibility are combined, so that the insulating part has excellent heat resistance, dielectric property, mechanical property and stable chemical and physical property, although the polyurethane or polyester resin paint coating also has insulating property and is a common enameled wire insulating paint, such an insulating layer lacks heat resistance and stable property, and a material layer structure for increasing heat resistance is generally required to be added to the enameled wire The polyester resin fiber paint coating is combined as an insulating paint coating, and the chemical or physical properties of the coating are greatly improved.
The preparation method of the polyamide-imide paint coating comprises the following steps:
step 100, preparing an imide prepolymer solution;
firstly, sequentially adding N-methyl pyrrolidone and trimellitic anhydride into a three-neck flask, slightly heating to dissolve the N-methyl pyrrolidone and the trimellitic anhydride, and then adding 4, 4' -diphenylmethane diisocyanate to carry out chemical reaction;
then, adjusting the initial temperature of the chemical reaction to be 70-90 ℃, and the reaction time to be 2-3 h;
and heating to 120-140 ℃ again to enable the trimellitic anhydride and the 4,4 '-diphenylmethane diisocyanate to react fully until the acid value is constant, adjusting the molar ratio of the trimellitic anhydride to the 4, 4' -diphenylmethane diisocyanate and keeping the solid content constant to obtain the imide prepolymer solution.
Step 200, preparing closed isocyanate;
adding N-methyl pyrrolidone, 4' -diphenylmethane diisocyanate and a sealing agent into a three-neck flask for reaction, and sampling every 20-40 minutes in the reaction process to detect the content of residual-NCO groups in the three-neck flask until the content is zero.
And step 300, uniformly stirring and mixing the same amount of imide prepolymer solution and blocked isocyanate solution, and preparing the paint.
In the prior art, imide prepolymer is generally synthesized by an acyl chloride route and a diisocyanate route, the former has long process flow, the storage stability of acyl chloride and derivatives is poor, particularly HCl gas is released in the production process to pollute the environment and corrode equipment, and the latter simplifies the operation process, but the former has two defects: namely, the paint has poor storage property due to high-activity isocyanic acid radical in the product, the molecular weight of the product is too large, the viscosity of the paint is too large, a large amount of solvent is consumed, and the paint is difficult to coat.
The aramid fiber woven layer 44 is formed by spirally winding and weaving aramid fibers on the surface of the polyester resin fiber paint coating 43 under a semi-solid state when the polyester resin fiber paint coating 43 is cooled, and part of the aramid fiber woven layer 44 is embedded in the surface of the polyester resin fiber paint coating 43.
Through this mode, can directly fuse at insulating part around covering 45 with aramid fiber silk weaving layer 44 and the mica tape as the fire prevention part, as a whole, be difficult to drop, still have good tensile properties, also increased the intensity of whole enameled wire.
Example 2:
the invention provides a preparation method of a high-conductivity enameled wire, which comprises the following steps:
step 100, obtaining a nano silver-copper alloy through electrolysis, smelting, and obtaining a nano silver-copper alloy core with a required specification through rolling and stretching processes;
step 200, quenching the nano silver-copper alloy core, and introducing deionized water to rapidly cool after the nano silver-copper alloy core reaches the quenching temperature;
step 300, cooling the nano silver-copper alloy core, putting the cooled nano silver-copper alloy core into tempering equipment, heating and preserving heat, and naturally cooling to normal temperature;
400, sequentially coating a tensile fiber layer and a tin coating layer, and then conveying the coated fiber layer and the tin coating layer into a painting machine to be painted with an insulating paint layer;
as shown in fig. 3, the quenching treatment process in step 200 is performed by a special quenching device, which includes a constant temperature oven 301, a plurality of infrared heating pipes 302 are disposed on an inner wall of the constant temperature oven 301, a steering wheel 303 for changing a traction direction of the nano silver-copper alloy core is further installed in the constant temperature oven 301, a cooling water tank 304 is disposed at the bottom of the constant temperature oven 301, an oxygen-free connecting pipe 305 is disposed between the cooling water tank 304 and the constant temperature oven 301, and the oxygen-free connecting pipe 305 is fixedly installed at a lower bottom surface of the constant temperature oven 301.
Quenching process of nanometer silver-copper alloy core is realized to guenching unit, nanometer silver-copper alloy core heats the quenching temperature back in constant temperature oven 301, enter into the ion water in going cooling trough 304 through anaerobic connecting pipe 305, quenching process has not only been realized, still wash nanometer silver-copper alloy core surface simultaneously, wherein anaerobic connecting pipe 305 bottom sets up once at the deionized water liquid level, nanometer silver-copper alloy core has been prevented to contact with the atmosphere and has taken place the oxidation, in order to avoid taking place the suck-back phenomenon, install the voltage-sharing solenoid valve on the anaerobic connecting pipe 305, when stop work, open the voltage-sharing solenoid valve, make inside and outside atmospheric pressure of anaerobic connecting pipe 305 keep balanced, prevent the emergence of suck-back phenomenon.
The tempering equipment in the step 300 comprises a tempering furnace 401, wherein a heat dissipation water tank 402 is arranged at the bottom of the tempering furnace 401, heat dissipation liquid 403 is filled in the heat dissipation water tank 402, a cooling chamber 404 is fixedly installed in the heat dissipation water tank 402, the bottom of the cooling chamber 404 is immersed in the heat dissipation liquid 403, and a plurality of transfer wheels 405 are fixedly installed in the cooling chamber 404.
The tempering device is used for tempering process of the nano silver-copper alloy core and natural cooling after tempering, in the embodiment, the nano silver-copper alloy core completing the tempering process enters the cooling cavity 404 filled with nitrogen, the nano silver-copper alloy core is naturally cooled under the protection of the nitrogen, and meanwhile, the heat of the nano silver-copper alloy core is discharged through the heat dissipation liquid 403, so that natural sealing cooling of the nano silver-copper alloy core is realized, oxidation of the nano silver-copper alloy core is prevented, and the cooling rate of the nano silver-copper alloy core is accelerated.
The painting machine in the step 400 comprises a drying box 601, a painting groove 602 is formed in the bottom of the drying box 601, a plurality of synchronizing wheels 603 are mounted at the bottom of the painting groove 602 and at the top of the drying box 601, the synchronizing wheels 603 in the drying box 601 are connected with a first motor 604 through chain transmission, and the synchronizing wheels 603 in the painting groove 602 are connected with a second motor 605 through chain transmission.
The mode of vertical painting is adopted to coat the insulating paint, the insulating paint is only under the action of gravity in the coating process, and when the enameled wire is pulled upwards, the insulating paint is uniformly coated on the nano silver-copper alloy core, so that the enameled wire is prevented from generating an eccentric phenomenon, and the working performance of the enameled wire is improved.
Nanometer silver-copper alloy core carries out the coating of insulated paint when the groove of lacquering, then vertically carry stoving case 601 in, the enameled wire is at the in-process of vertical transport, insulated paint flows down along nanometer silver-copper alloy core for thickness coating such as insulated paint is on nanometer silver-copper alloy core, avoided the enameled wire to lead to insulated paint thickness everywhere to differ because of insulated paint coating off-centre, synchronizing wheel 603 is the same with the pulling speed of enameled wire simultaneously, the wearing and tearing because of frictional force production have been avoided between enameled wire and the synchronizing wheel 603.
It is worth to be noted that the drying box 601 dries the enameled wire by using the hot air circulation catalytic combustion technology in the prior art, that is, hot air generated by the combustion of the organic solvent in the insulating varnish is reused in the drying box 601 through the circulation system for drying the enameled wire. Thus, the solvent can be prevented from being directly discharged into the atmosphere, and the heat energy generated by catalytic combustion of the solvent can be utilized, namely, the solvent is used as a second energy source.
In the prior art, during the insulating paint coating process of the production equipment of the enameled wire, the felt is used for coating the insulating paint, the insulating paint coating thickness on the nano silver-copper alloy core is inconsistent due to the solidification of the insulating paint on the felt, and meanwhile, in the enameled wire drying process, the nano silver-copper alloy core is inclined to easily cause the insulating paint to generate a centrifugal phenomenon, so that the insulating paint thickness on the enameled wire is inconsistent, and the production quality of the enameled wire is greatly influenced.
Compared with the prior art, the invention adopts an infiltration mode to coat the insulating paint, and utilizes a vertical traction mode to uniformly control the thickness of the insulating paint, thereby avoiding the phenomenon of eccentricity of the insulating paint of the enameled wire in the prior art, ensuring the equal thickness of the insulating paint at each part, and simultaneously greatly improving the production quality and the working performance of the enameled wire.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (9)

1. The enameled wire with high conductivity comprises a conductive core layer (1), and is characterized in that a tensile fiber layer (2) is arranged on the surface of the conductive core layer (1), a tin coating (3) is arranged on the surface of the tensile fiber layer (2), an insulating paint layer (4) is arranged on the surface of the tin coating (3), the conductive core layer (1) comprises a nano silver-copper alloy core (101), an inorganic insulating micro-particle layer (102) is arranged on the surface of the nano silver-copper alloy core (101), and the tensile fiber layer (2) is spirally wound on the surface of the inorganic insulating micro-particle layer (102) by a plurality of carbon fiber wires in a staggered manner of forward and backward directions;
the inorganic insulating micro-particle layer (102) is formed on the surface of the nano silver-copper alloy core (101), when the nano silver-copper alloy core (101) is subjected to fusion rolling and stretching forming, the inner surface of a forming groove is set to be a slightly rough structure, a silicon dioxide micro-particle layer is attached, the nano silver-copper alloy core (101) is formed on the surface of the forming groove when cooled, and then an insulating material is coated to form the inorganic insulating micro-particle layer (102).
2. The enameled wire with high electric conductivity according to claim 1, wherein: the preparation method of the nano silver-copper alloy core (101) comprises the following steps:
step 100, hermetically installing a conductive glass plate and a silver plate at two ends of a horizontally placed glass tube, wherein the conductive glass plate is used as a cathode, and the silver plate is used as an anode;
step 200, preparing electrolyte, and adding the electrolyte into a glass tube;
step 300, setting the deposition potential between the conductive glass plate and the silver plate to be-1.2V, and depositing at room temperature to obtain a nano silver-copper alloy;
and step 400, smelting, rolling and stretching the nano silver-copper alloy to obtain the nano silver-copper alloy core in the required shape.
3. The enameled wire with high electric conductivity according to claim 2, wherein: the glass pipe is by trunk line and encircle a plurality of deposit pipes that set up on the trunk line surface, the trunk line with deposit pipe intercommunication and integrated into one piece, the diameter of deposit pipe is 0.5 ~ 1.5 mm.
4. The enameled wire with high electric conductivity according to claim 2, wherein: and placing a magnetic stirrer in the glass tube, and slowly stirring in a magnetic stirring mode in the deposition process at a rotating speed of 20-40 r/min.
5. The enameled wire with high electric conductivity according to claim 2, wherein: preparing the electrolyte: 30ml of secondary deionized water was added to the beaker followed by 0.0185g of silver nitrate and 0.0125g of Cu (NO)3).3H2And O, stirring uniformly by using a glass rod.
6. The enameled wire with high electric conductivity according to any one of claims 1-5, wherein the preparation method of the enameled wire comprises the following steps:
step 100, obtaining a nano silver-copper alloy through electrolysis, smelting, and obtaining a nano silver-copper alloy core with a required specification through rolling and stretching processes;
step 200, quenching the nano silver-copper alloy core, and introducing deionized water to rapidly cool after the nano silver-copper alloy core reaches the quenching temperature;
step 300, cooling the nano silver-copper alloy core, putting the cooled nano silver-copper alloy core into tempering equipment, heating and preserving heat, and naturally cooling to normal temperature;
and 400, sequentially coating the tensile fiber layer and the tin coating layer, and then conveying the coated film to a painting machine to paint an insulating paint layer.
7. The enameled wire with high electric conductivity according to claim 6, wherein: quenching treatment process in step 200 is gone on through dedicated guenching unit, and it includes constant temperature oven (301), be equipped with a plurality of infrared heating pipe (302) on constant temperature oven (301) inner wall, still install directive wheel (303) that are used for changing nanometer silver-copper alloy core pulling direction in constant temperature oven (301), constant temperature oven (301) bottom is equipped with cooling trough (304), be equipped with anaerobic connecting pipe (305) between cooling trough (304) and constant temperature oven (301), bottom surface under anaerobic connecting pipe (305) fixed mounting constant temperature oven (301).
8. The enameled wire with high electric conductivity according to claim 6, wherein: the tempering equipment in the step 300 comprises a tempering furnace (401), wherein a heat dissipation water tank (402) is arranged at the bottom of the tempering furnace (401), heat dissipation liquid (403) is filled in the heat dissipation water tank (402), a cooling chamber (404) is further fixedly installed in the heat dissipation water tank (402), the bottom of the cooling chamber (404) is immersed in the heat dissipation liquid (403), and a plurality of transfer wheels (405) are fixedly installed in the cooling chamber (404).
9. The enameled wire with high electric conductivity according to claim 6, wherein: the painting machine in the step 400 comprises a drying box (601), a painting groove (602) is formed in the bottom of the drying box (601), a plurality of synchronizing wheels (603) are mounted at the bottom of the painting groove (602) and the inner top of the drying box (601), the synchronizing wheels (603) located in the drying box (601) are connected with a first motor (604) through chain transmission, and the synchronizing wheels (603) located in the painting groove (602) are connected with a second motor (605) through chain transmission.
CN201811127842.8A 2018-09-27 2018-09-27 Enameled wire with high conductivity and preparation method thereof Active CN109192354B (en)

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US20060165983A1 (en) * 2002-04-12 2006-07-27 Jongo Yoon Enameled wire having magnetic reluctance properties and preparation method thereof, and coil using the same and preparation method thereof
JP5609732B2 (en) * 2011-03-22 2014-10-22 日立金属株式会社 Insulating paint and insulated wire using the same
CN102321825A (en) * 2011-10-13 2012-01-18 西北工业大学 Silver-copper nano alloy and electrosynthesis method thereof
CN103117116A (en) * 2013-01-16 2013-05-22 浙江宏磊铜业股份有限公司 High-strength high-conductivity enameled copper alloy wire
CN203931525U (en) * 2014-03-25 2014-11-05 苏州卓轩软件科技有限公司 A kind of enamelled wire
CN105139915B (en) * 2015-08-31 2017-03-15 无锡华虹信息科技有限公司 A kind of preparation method of the corrosion proof cable with admiro

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