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CN112103004A - Direct current cable for electric automobile conduction charging system - Google Patents

Direct current cable for electric automobile conduction charging system Download PDF

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Publication number
CN112103004A
CN112103004A CN202010973565.3A CN202010973565A CN112103004A CN 112103004 A CN112103004 A CN 112103004A CN 202010973565 A CN202010973565 A CN 202010973565A CN 112103004 A CN112103004 A CN 112103004A
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China
Prior art keywords
rotate
driving
rotating shaft
drives
rotating
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CN202010973565.3A
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Chinese (zh)
Inventor
吴云
方伟
李坤
居盛文
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Individual
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Individual
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Priority to CN202010973565.3A priority Critical patent/CN112103004A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/02Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/021Features relating to screening tape per se
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/30Drying; Impregnating
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/02Disposition of insulation
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22Metal wires or tapes, e.g. made of steel
    • H01B7/221Longitudinally placed metal wires or tapes
    • H01B7/223Longitudinally placed metal wires or tapes forming part of a high tensile strength core

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The invention discloses a direct current cable for an electric automobile conduction charging system, which comprises an outer sheath, a shielding layer, an inner sheath, filling, a conductor, an insulating layer, a steel wire and a polyethylene layer, wherein the shielding layer is arranged inside the outer sheath, the inner sheath is arranged on the inner side of the shielding layer, and the filling is arranged inside the inner sheath; the direct current cable is simple in structure, convenient to use, and good in shielding effect; according to the invention, graphene is uniformly dispersed in ethylene-vinyl acetate copolymer EVA resin, the volume resistivity of the semiconductive shielding material is reduced to be below 30 omega cm, a homogenized electric field is greatly improved, smooth gapless contact among a conductor, an insulating layer and a metal shielding layer is realized, the effect of shielding the homogenized electric field of the cable is improved, the electric performance and the long-term operation reliability of the cable are improved, and the graphene-based semi-conductive shielding material is suitable for a non-metal shielding layer of the cable with the voltage of more than 6 kV.

Description

Direct current cable for electric automobile conduction charging system
Technical Field
The invention relates to the technical field of cables, in particular to a direct-current cable for a conduction charging system of an electric automobile.
Background
Cables are made of one or more mutually insulated conductors and an outer insulating sheath that carries power or information from one point to another. Typically a rope-like cable made up of several or groups of conductors (at least two in each group) twisted together, with the conductors of each group being insulated from one another and often twisted around a center, the entire outer surface being coated with a highly insulating coating. They are composed of single or multi-strand wires and soft copper conductors, and are used for connecting circuits, electric appliances and the like. The cable for the direct-current charging system is suitable for automobile charging pile equipment, a mobile portable charging wire and cable device and a wire/motor wire for the interior of an electric automobile. According to the information consultation and release display of the standing tree: receive new energy automobile rapid development's promotion, supporting facilities such as charging station and electric pile also meet the rapid development. In 2010 to 2016, the stock keeping quantity of Chinese charging stations is increased from 76 seats to 5600 seats, the annual composite growth rate reaches 104.8%, the number of public charging piles is increased from 1122 to 15 thousands, and the annual composite growth rate is 126.1%. In addition to public charging piles, the amount of charging piles reserved in 2016 nationwide private residence areas is about 17 ten thousand, and the total amount of charging piles in 2016 nationwide is estimated to be nearly 31 ten thousand.
The semiconductive shielding material for the existing crosslinked cable is mainly prepared by uniformly dispersing and adding conductive carbon black into ethylene-vinyl acetate copolymer EVA, but is influenced by factors of unsatisfactory conductivity of the carbon black and insufficient particle size, the volume resistivity of the semiconductive shielding material is between 40 and 100 omega cm, and the smoothness of the material surface is not good enough, so that the semiconductive shielding material has an unsatisfactory effect on a cable shielding homogenized electric field, and has an obvious influence on high-voltage and ultrahigh-voltage cables. Meanwhile, in the process of preparing the shielding material, the shielding material is not convenient to screen, so that the raw material is not uniform.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a direct current cable for a conductive charging system of an electric automobile, graphene is uniformly dispersed into ethylene-vinyl acetate copolymer (EVA) resin, the volume resistivity of a semiconductive shielding material is reduced to be below 30 omega cm, a homogenized electric field is greatly improved, smooth gapless contact among a conductor, an insulating layer and a metal shielding layer is realized, the effect of the cable in shielding the homogenized electric field is improved, the electrical performance and the long-term operation reliability of the cable are improved, and the direct current cable is suitable for a nonmetal shielding layer of a cable with the voltage of more than 6 kV;
the dehydrated materials are placed into a drying barrel, a heating element is started to heat the dehydrated materials, an air cylinder is started to drive a movable plate to descend until a stirring shaft is inserted into the drying barrel, a motor II is started to rotate to drive a rotating shaft IV to rotate, the rotating shaft IV drives the stirring shaft to rotate to stir and dry the materials, and the material drying efficiency is improved;
the invention drives a driving wheel to rotate through a belt by starting a first motor to rotate, the driving wheel drives a first rotating shaft to rotate, the rotating shaft drives a first gear to rotate, the gear drives a second gear to rotate, the second gear drives a first bevel gear and a third rotating shaft to rotate, the first bevel gear is meshed with the second bevel gear to further drive the second bevel gear to rotate, the second bevel gear drives a second half moon wheel to rotate, the second half moon wheel drives a rotating wheel and a clamping column to rotate, the clamping column is matched with a clamping groove, the second half moon wheel is matched with a rotating fan blade to further drive the rotating fan blade to rotate, the rotating fan blade drives a second rotating shaft to rotate, the second rotating shaft drives a rotating disc to rotate, the third rotating shaft drives a movable block to rotate, the movable block drives a rocker to rotate; opening a valve, enabling the dried material to enter a screen through a discharge pipe, inserting a cross-shaped inserted rod into the screen when the screen rotates below the cross-shaped inserted rod, starting a driving motor to drive the cross-shaped inserted rod to rotate so as to drive the screen to rotate, and screening the material by the screen; the collecting cylinder and the screen are driven to rotate one by driving the rotary table to reach the position below the cross-shaped inserting rod, the lifting plate is driven to lift by the rocker, the cross-shaped inserting rod is driven to lift and insert the screen, the driving motor is started to drive the cross-shaped inserting rod to rotate, and then the screen is driven to rotate, so that the material is conveniently screened, more uniform material is obtained, and the subsequent processing and use are facilitated;
according to the invention, the inner wall of the collecting tank is provided with the limiting groove, the collecting cylinder is placed in the collecting tank, the clamping strips are respectively arranged on two sides of the collecting cylinder and are matched with the limiting groove, and the structure is convenient for taking and placing the screen and the collecting cylinder, taking out materials and using the materials, so that the graphene-containing polyolefin high-semiconductive shielding material for the cable can be obtained.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides an electric automobile conduction direct current cable for charging system, includes oversheath, shielding layer, inner sheath, packing, conductor, insulating layer, steel wire, polyethylene layer, the inside of oversheath is provided with the shielding layer, the inboard of shielding layer is provided with the inner sheath, the inside of inner sheath is provided with the packing, the inside equidistance of packing is provided with four insulating layers, the inside of insulating layer is provided with the conductor, four the center department of insulating layer is provided with the polyethylene layer, the inside on polyethylene layer is provided with the steel wire.
As a further scheme of the invention: the shielding layer is prepared by the following steps:
firstly, according to the mass percentage, ethylene-vinyl acetate copolymer EVA 85-88%, graphene powder 7-8.5%, white oil 5-5.4%, antioxidant 0.6-0.7%, and zinc stearate 0.4-0.5%, stirring and mixing for 1-2 minutes at the rotation speed of 150-200rpm to obtain a uniformly mixed material;
step two, plasticizing the mixture for the first time, wherein the rotating speed of a screw is 180-220rpm, and the temperature of each area in a plasticizing area is as follows: the first zone is 85-90 ℃, the second zone is 105-110 ℃, the third zone is 115-125 ℃, the fourth zone is 100-105 ℃, and the fifth zone is 90-95 ℃; and then carrying out second plasticizing, wherein the rotating speed of the screw is 120-150rpm, and the temperature of each area of the extrusion molding area is as follows: the temperature of the first zone is 85-90 ℃, the temperature of the second zone is 85-90 ℃, and the temperature of the machine head is 105-;
step three, preparing the plastic into cylindrical particles with the diameter of 3.5mm multiplied by the height of 3mm under the conditions that the temperature is 105-115 ℃ and the pressure is 5.0-7.0MPa, and cooling the cylindrical particles to the room temperature by purified water;
step four, dehydrating the cylindrical particles at the rotating speed of 1080-;
drying the dehydrated material by drying equipment at the temperature of 45-50 ℃ to obtain the graphene-containing polyolefin high-semiconductive shielding material for the cable, and naturally cooling to room temperature;
step six, adding the polyolefin high-semiconductive shielding material into an extruder, heating, extruding and forming to obtain a shielding layer, wherein the heating temperature is 110-120 ℃.
As a further scheme of the invention: the antioxidant is 4,4' -thiobis (6-tert-butyl-3-methylphenol).
As a further scheme of the invention: the particle size of the graphene powder is less than 10 microns.
As a further scheme of the invention: the method comprises the following steps of firstly, 86% of ethylene-vinyl acetate copolymer EVA and 8% of graphene powder.
As a further scheme of the invention: the drying equipment comprises the following working steps:
step one, putting the dehydrated material into a drying barrel, starting a heating element for heating, starting an air cylinder to drive a movable plate to descend until a stirring shaft is inserted into the drying barrel, starting a motor II to rotate to drive a rotating shaft IV to rotate, and driving the stirring shaft to rotate by the rotating shaft IV to stir and dry;
step two, starting a motor I to rotate, driving a driving wheel to rotate through a belt, driving the rotating shaft I to rotate, driving a gear I to rotate through the rotating shaft, driving a gear II to rotate through the gear, driving a bevel gear I and a rotating shaft III to rotate through the gear II, meshing the bevel gear I with the bevel gear II, further driving a bevel gear II to rotate, driving a half moon wheel to rotate through the bevel gear II, driving a rotating wheel and a clamping column to rotate through the half moon wheel, matching the clamping column with the clamping groove, matching the half moon wheel with a rotating fan blade, further driving the rotating fan blade to rotate, driving a rotating shaft II to rotate, driving a rotating disc to rotate through the rotating shaft II, simultaneously driving a movable block to rotate through the rotating shaft III, driving a rocker to;
opening a valve, enabling the dried material to enter a screen through a discharge pipe, inserting a cross-shaped inserted rod into the screen when the screen rotates below the cross-shaped inserted rod, starting a driving motor to drive the cross-shaped inserted rod to rotate so as to drive the screen to rotate, and screening the material by the screen;
and step four, taking down the screen and the collecting cylinder after screening to obtain the graphene-containing polyolefin high semi-conductive shielding material for the cable.
As a further scheme of the invention: the drying equipment comprises a support, an operating platform, a lifting assembly, a rotary table and a drying barrel, wherein the operating platform is fixedly installed at the center of the top of the support, a first motor is fixedly installed at one end of the top of the support, a belt pulley is sleeved on an output shaft of the first motor and connected with a transmission wheel through a belt, the transmission wheel is sleeved at one end of a first rotating shaft, the other end of the first rotating shaft extends into the operating platform and is rotatably connected with one side of the inner wall of the operating platform, a first gear is further sleeved on the first rotating shaft and located in the operating platform and meshed with a second gear, the second gear is sleeved on a third rotating shaft, a first bevel gear is sleeved on one side of the third rotating shaft, close to the second gear, and meshed with the second bevel gear, and the bottom of the second bevel gear is fixedly connected with a third gear through a transmission shaft, the bottom of the gear III is in transmission connection with a half-moon wheel, the bottom of the half-moon wheel is in transmission connection with a rotating wheel, one end of the top of the rotating wheel is vertically provided with a clamping column, and the rotating wheel is rotatably arranged on the top of the operating platform;
two ends of the rotating shaft III penetrate through the rotating disc and are movably connected with the movable block, the other end of the movable block is movably connected with the rocker, the other end of the rocker is movably connected with the lifting plate, a driving motor is fixedly installed at the center of the bottom of the lifting plate, and a cross-shaped inserting rod is fixedly installed on an output shaft of the driving motor; two guide rods are symmetrically arranged at the top of the operating platform, and the guide rods penetrate through the lifting plate and are connected with the limiting plate;
the inner wall of the bottom of the operating platform is rotatably connected with a rotating fan blade, the rotating fan blade is provided with clamping grooves at equal intervals, the clamping grooves are matched with clamping columns, the rotating fan blade is matched with a half moon wheel, the top of the rotating fan blade is fixedly provided with a rotating shaft II, the rotating shaft II penetrates through the operating platform and is connected with a rotary table, collecting tanks are arranged in the rotary table at equal intervals, limiting grooves are arranged on the inner wall of each collecting tank, a collecting tank is placed in each collecting tank, clamping strips are arranged on two sides of each collecting tank and are matched with the limiting grooves, the inner wall of the bottom of each collecting tank is spliced with a screen through the rotating shaft, cross-shaped slots are arranged on the inner wall of the bottom of each screen, the cross-shaped slots are matched with cross-shaped inserting rods, a drying barrel is fixedly arranged on the top of the operating, arrange and install the valve on the material pipe, evenly install heating element on the stoving bucket, the top fixed mounting of operation panel has lifting unit, lifting unit includes cylinder, fly leaf, motor two, pivot four, sealed lid, (mixing) shaft, two the cylinder symmetry is installed in the operation panel both sides, and the piston rod top fixed mounting of cylinder has the fly leaf, the top center department fixed mounting of fly leaf has motor two, the output shaft of motor two runs through the fly leaf and is connected with pivot four, the other end of pivot four runs through sealed lid and is connected with the stirring shaft.
The invention has the beneficial effects that:
the direct current cable is simple in structure, convenient to use, and good in shielding effect; according to the invention, graphene is uniformly dispersed into ethylene-vinyl acetate copolymer EVA resin, so that the volume resistivity of the semiconductive shielding material is reduced to be below 30 omega cm, a homogenized electric field is greatly improved, smooth gapless contact among a conductor, an insulating layer and a metal shielding layer is realized, the effect of shielding the homogenized electric field of the cable is improved, the electric performance and the long-term operation reliability of the cable are improved, and the graphene-based semi-conductive shielding material is suitable for a non-metal shielding layer of the cable with the voltage of more than 6 kV;
putting the dehydrated material into a drying barrel, starting a heating element for heating, starting an air cylinder to drive a movable plate to descend until a stirring shaft is inserted into the drying barrel, starting a motor II to rotate to drive a rotating shaft IV to rotate, and driving the stirring shaft to rotate by the rotating shaft IV to stir and dry, so that the material drying efficiency is improved;
starting a motor I to rotate, driving a driving wheel to rotate through a belt, driving the rotating shaft I to rotate, driving a gear I to rotate through the rotating shaft, driving a gear II to rotate through the gear, driving a bevel gear I and a rotating shaft III to rotate through the gear II, meshing the bevel gear I with the bevel gear II, further driving the bevel gear II to rotate, driving a half moon wheel to rotate, driving a rotating wheel and a clamping column to rotate through the half moon wheel, matching the clamping column with a clamping groove, matching the half moon wheel with a rotating fan blade, further driving the rotating fan blade to rotate, driving the rotating shaft II to rotate, driving a rotating disc to rotate through the rotating shaft II, simultaneously driving a movable block to rotate through the rotating shaft III, driving a rocker to rotate, driving a lifting; opening a valve, enabling the dried material to enter a screen through a discharge pipe, inserting a cross-shaped inserted rod into the screen when the screen rotates below the cross-shaped inserted rod, starting a driving motor to drive the cross-shaped inserted rod to rotate so as to drive the screen to rotate, and screening the material by the screen; the collecting cylinder and the screen are driven to rotate one by driving the rotary table to reach the position below the cross-shaped inserting rod, the lifting plate is driven to lift by the rocker, the cross-shaped inserting rod is driven to lift and insert the screen, the driving motor is started to drive the cross-shaped inserting rod to rotate, and then the screen is driven to rotate, so that the material is conveniently screened, more uniform material is obtained, and the subsequent processing and use are facilitated;
the utility model discloses a cable collection device, including collecting vat, card strip, screen cloth and collecting vat, the spacing groove has been seted up on the inner wall of collecting vat, the collecting vat has been placed to inside, the card strip is all installed to the both sides of collecting vat, card strip and spacing groove adaptation, through the setting of this structure, be convenient for get and put screen cloth and collecting vat, conveniently take out the material, facilitate the use, can obtain the high semi-conductive shielding material of polyolefin that contains graphite alkene for the cable.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the DC cable configuration of the present invention;
FIG. 2 is a schematic view of the overall structure of the drying apparatus of the present invention;
FIG. 3 is a schematic view of a part of the drying apparatus according to the present invention;
FIG. 4 is a schematic view of the front view of the turntable of the present invention;
FIG. 5 is a schematic top view of the turntable of the present invention;
FIG. 6 is a schematic view of the overall construction of the lift assembly of the present invention;
FIG. 7 is a schematic isometric view of the interior of the station of the present invention;
fig. 8 is another isometric view of the interior of the station of the present invention.
In the figure: 1. an outer sheath; 2. a shielding layer; 3. an inner sheath; 4. filling; 5. a conductor; 6. an insulating layer; 7. a steel wire; 8. a polyethylene layer; 100. a support; 200. an operation table; 300. a lifting assembly; 400. a turntable; 500. a drying barrel; 11. a first motor; 12. a driving wheel; 13. a lifting plate; 14. a cross-shaped plunger; 15. a guide bar; 16. a rocker; 17. a movable block; 18. a first rotating shaft; 19. a second rotating shaft; 20. a first gear; 21. a second gear; 22. a first bevel gear; 23. a second bevel gear; 24. a third gear; 25. a half-moon wheel; 26. a rotating wheel; 27. clamping the column; 28. a rotating shaft III; 29. rotating the fan blades; 30. a card slot; 31. a cylinder; 32. a movable plate; 33. a second motor; 34. a rotating shaft IV; 35. a sealing cover; 36. a stirring shaft; 41. a collection canister; 42. screening a screen; 43. a fifth rotating shaft; 44. a limiting groove; 45. clamping the strip; 46. and (4) collecting the tank.
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. 1-8, a direct current cable for a conductive charging system of an electric vehicle includes an outer sheath 1, a shielding layer 2, an inner sheath 3, a filler 4, a conductor 5, an insulating layer 6, a steel wire 7, and a polyethylene layer 8, the shielding layer 2 is disposed inside the outer sheath 1, the inner sheath 3 is disposed inside the shielding layer 2, the filler 4 is disposed inside the inner sheath 3, the filler 4 is a foam, four insulating layers 6 are disposed inside the filler 4 at equal intervals, the conductor 5 is disposed inside the insulating layer 6, the polyethylene layer 8 is disposed in the center of the four insulating layers 6, and the steel wire 7 is disposed inside the polyethylene layer 8.
The shielding layer 2 is prepared by the following steps:
firstly, according to the mass percentage, ethylene-vinyl acetate copolymer EVA 85-88%, graphene powder 7-8.5%, white oil 5-5.4%, antioxidant 0.6-0.7%, and zinc stearate 0.4-0.5%, stirring and mixing for 1-2 minutes at the rotation speed of 150-200rpm to obtain a uniformly mixed material;
step two, plasticizing the mixture for the first time, wherein the rotating speed of a screw is 180-220rpm, and the temperature of each area in a plasticizing area is as follows: the first zone is 85-90 ℃, the second zone is 105-110 ℃, the third zone is 115-125 ℃, the fourth zone is 100-105 ℃, and the fifth zone is 90-95 ℃; and then carrying out second plasticizing, wherein the rotating speed of the screw is 120-150rpm, and the temperature of each area of the extrusion molding area is as follows: the temperature of the first zone is 85-90 ℃, the temperature of the second zone is 85-90 ℃, and the temperature of the machine head is 105-;
step three, preparing the plastic into cylindrical particles with the diameter of 3.5mm multiplied by the height of 3mm under the conditions that the temperature is 105-115 ℃ and the pressure is 5.0-7.0MPa, and cooling the cylindrical particles to the room temperature by purified water;
step four, dehydrating the cylindrical particles at the rotating speed of 1080-;
drying the dehydrated material by drying equipment at the temperature of 45-50 ℃ to obtain the graphene-containing polyolefin high-semiconductive shielding material for the cable, and naturally cooling to room temperature;
step six, adding the polyolefin high semiconductive shielding material into an extruder, heating, extruding and forming to obtain the shielding layer 2, wherein the heating temperature is 110-.
The antioxidant is 4,4' -thiobis (6-tert-butyl-3-methylphenol).
The particle size of the graphene powder is less than 10 microns.
The method comprises the following steps of firstly, 86% of ethylene-vinyl acetate copolymer EVA and 8% of graphene powder.
The drying equipment comprises the following working steps:
step one, putting the dehydrated material into a drying barrel 500, starting a heating element for heating, starting an air cylinder 31 to drive a movable plate 32 to descend until a stirring shaft 36 is inserted into the drying barrel 500, starting a second motor 33 to rotate to drive a fourth rotating shaft 34 to rotate, and driving the stirring shaft 36 to rotate by the fourth rotating shaft 34 for stirring and drying;
step two, starting a motor I11 to rotate, driving a driving wheel 12 to rotate through a belt, driving the driving wheel 12 to drive a rotating shaft I18 to rotate, driving a gear I20 to rotate by the rotating shaft I18, driving a gear II 21 to rotate by the gear I20, driving a bevel gear I22 and a rotating shaft III 28 to rotate by the gear II 21, meshing the bevel gear I22 with the bevel gear II 23 to drive a bevel gear II 23 to rotate, driving a half moon wheel 25 to rotate by the bevel gear II 23, driving a rotating wheel 26 and a clamping column 27 to rotate by the half moon wheel 25, matching the clamping column 27 with a clamping groove 30, matching the half moon wheel 25 with a rotating fan blade 29, further driving the rotating fan blade 29 to rotate, driving a rotating shaft II 19 to rotate, driving a rotating disc 400 to rotate by the rotating shaft II 19, driving a movable block 17 to rotate by the rotating shaft III 28, driving a movable block 17 to drive a rocker 16 to rotate;
step three, opening a valve, enabling the dried materials to enter the screen 42 through a discharge pipe, inserting the cross-shaped inserted link 14 into the screen 42 when the screen 42 rotates to the position below the cross-shaped inserted link 14, starting a driving motor to drive the cross-shaped inserted link 14 to rotate, further driving the screen 42 to rotate, and screening the materials by the screen 42;
and step four, taking down the screen 42 and the collecting barrel 41 after screening to obtain the graphene-containing polyolefin high semi-conductive shielding material for the cable.
The drying equipment comprises a support 100, an operating platform 200, a lifting component 300, a turntable 400 and a drying barrel 500, wherein the operating platform 200 is fixedly installed at the center of the top of the support 100, a first motor 11 is fixedly installed at one end of the top of the support 100, a belt pulley is sleeved on an output shaft of the first motor 11 and is connected with a transmission wheel 12 through a belt, the transmission wheel 12 is sleeved at one end of a first rotating shaft 18, the other end of the first rotating shaft 18 extends into the operating platform 200 and is rotatably connected with one side of the inner wall of the operating platform 200, a first gear 20 is further sleeved on the first rotating shaft 18, the first gear 20 is positioned in the operating platform 200, the first gear 20 is meshed with a second gear 21, the second gear 21 is sleeved on a third rotating shaft 28, a first bevel gear 22 is sleeved on one side of the third rotating shaft 28, which is close to the second gear 21, and the first bevel gear 22 is meshed with a, the bottom of the second bevel gear 23 is fixedly connected with a third gear 24 through a transmission shaft, the bottom of the third gear 24 is in transmission connection with a half-moon wheel 25, the bottom of the half-moon wheel 25 is in transmission connection with a rotating wheel 26, one end of the top of the rotating wheel 26 is vertically provided with a clamping column 27, and the rotating wheel 26 is rotatably arranged at the top of the operating platform 200;
two ends of the third rotating shaft 28 penetrate through the rotating disc 400 and are movably connected with the movable block 17, the other end of the movable block 17 is movably connected with the rocker 16, the other end of the rocker 16 is movably connected with the lifting plate 13, a driving motor is fixedly installed at the center of the bottom of the lifting plate 13, and a cross-shaped inserting rod 14 is fixedly installed on an output shaft of the driving motor; two guide rods 15 are symmetrically installed at the top of the operating platform 200, and the guide rods 15 penetrate through the lifting plate 13 and are connected with the limiting plate;
the inner wall of the bottom of the operating platform 200 is rotatably connected with a rotating fan blade 29, the rotating fan blade 29 is provided with a clamping groove 30 at equal distance, the clamping groove 30 is matched with a clamping column 27, the rotating fan blade 29 is matched with a half moon wheel 25, the top of the rotating fan blade 29 is fixedly provided with a second rotating shaft 19, the second rotating shaft 19 penetrates through the operating platform 200 and is connected with a rotary table 400, collecting grooves 46 are formed in the rotary table 400 at equal distance, the inner wall of each collecting groove 46 is provided with a limiting groove 44, a collecting cylinder 41 is placed in the collecting groove 46, clamping strips 45 are arranged on two sides of each collecting cylinder 41, the clamping strips 45 are matched with the limiting grooves 44, the inner wall of the bottom of each collecting cylinder 41 is spliced with a screen 42 through a fifth rotating shaft 43, the inner wall of the bottom of each screen 42 is provided with a cross-shaped slot which is matched with the cross-shaped inserted rod 14, and the top, a discharge pipe is fixedly installed at the bottom of the drying barrel 500, a valve is installed on the discharge pipe, heating elements are uniformly installed on the drying barrel 500, a lifting assembly 300 is fixedly installed at the top of the operating platform 200, the lifting assembly 300 comprises a cylinder 31, a movable plate 32, a motor II 33, a rotating shaft IV 34, a sealing cover 35 and a stirring shaft 36, the two cylinders 31 are symmetrically installed at two sides of the operating platform 200, the movable plate 32 is fixedly installed at the top of a piston rod of the cylinder 31, the motor II 33 is fixedly installed at the center of the top of the movable plate 32, an output shaft of the motor II 33 penetrates through the movable plate 32 to be connected with the rotating shaft IV 34, and the other end of the rotating shaft IV 34 penetrates through the sealing cover; sealed lid 35 can be at the internal rotation of stoving bucket 500, and the in-process of stirring is avoided to the setting of sealed lid 35, and the material splashes out.
The working principle of the invention is as follows:
putting the dehydrated materials into a drying barrel 500, starting a heating element for heating, starting an air cylinder 31 to drive a movable plate 32 to descend until a stirring shaft 36 is inserted into the drying barrel 500, starting a second motor 33 to rotate to drive a fourth rotating shaft 34 to rotate, driving the stirring shaft 36 to rotate by the fourth rotating shaft 34, stirring and drying the materials, and accelerating the drying efficiency of the materials;
starting a motor I11 to rotate, driving a driving wheel 12 to rotate through a belt, driving the driving wheel 12 to drive a rotating shaft I18 to rotate, driving a gear I20 to rotate through the rotating shaft I18, driving a gear II 21 to rotate through the gear I20, driving a bevel gear I22 and a rotating shaft III 28 to rotate through the gear II 21, meshing connection of the bevel gear I22 and the bevel gear II 23 is achieved, further driving a bevel gear II 23 to rotate, driving a half moon wheel 25 to rotate through the bevel gear II 23, driving a rotating wheel 26 and a clamping column 27 to rotate through the half moon wheel 25, matching the clamping column 27 with a clamping groove 30, matching the half moon wheel 25 with a rotating fan blade 29, further driving the rotating fan blade 29 to rotate, driving a rotating shaft II 19 to rotate, driving a rotating disc 400 to rotate through the rotating shaft III 28, driving a movable block 17 to rotate, driving a rocker 16 to rotate through the movable block 17, driving a; the valve is opened, the dried material enters the screen 42 through the discharge pipe, when the screen 42 rotates to the position below the cross-shaped inserted link 14, the cross-shaped inserted link 14 is inserted into the screen 42, the driving motor is started to drive the cross-shaped inserted link 14 to rotate, the screen 42 is further driven to rotate, and the screen 42 screens the material; the collecting cylinder 41 and the screen 42 are driven to rotate one by driving the rotating disc 400 to reach the position below the cross-shaped inserting rod 14, meanwhile, the lifting plate 13 is driven to lift by the rocker 16, the cross-shaped inserting rod 14 is driven to lift, the screen 42 is inserted, the driving motor is started to drive the cross-shaped inserting rod 14 to rotate, and then the screen 42 is driven to rotate, so that the materials can be screened conveniently, more uniform materials can be obtained, and the subsequent processing and use are facilitated;
limiting groove 44 has been seted up on collecting vat 46's the inner wall, collecting vat 41 has been placed to collecting vat 46 inside, card strip 45 is all installed to the both sides of collecting vat 41, card strip 45 and limiting groove 44 adaptation through the setting of this structure, are convenient for get and put screen cloth 42 and collecting vat 41, conveniently take out the material, facilitate the use, can obtain the polyolefin high semi-conductive shielding material that contains graphite alkene for the cable.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.

Claims (5)

1. The utility model provides an electric automobile conduction direct current cable for charging system, its characterized in that, including oversheath (1), shielding layer (2), inner sheath (3), fill (4), conductor (5), insulating layer (6), steel wire (7), polyethylene layer (8), the inside of oversheath (1) is provided with shielding layer (2), the inboard of shielding layer (2) is provided with inner sheath (3), the inside of inner sheath (3) is provided with fills (4), the inside equidistance of filling (4) is provided with four insulating layers (6), the inside of insulating layer (6) is provided with conductor (5), four the center department of insulating layer (6) is provided with polyethylene layer (8), the inside of polyethylene layer (8) is provided with steel wire (7).
2. The direct-current cable for the conduction charging system of the electric automobile according to claim 1, wherein the shielding layer (2) is prepared by the following steps:
step one, according to the mass percentage, 85% -88% of ethylene-vinyl acetate copolymer EVA, 7% -8.5% of graphene powder, 5% -5.4% of white oil, 0.6% -0.7% of antioxidant and 0.4% -0.5% of zinc stearate are stirred and mixed for 1-2 minutes at the rotating speed of 150-200rpm to obtain a uniformly mixed mixture;
step two, plasticizing the mixture for the first time, wherein the rotating speed of a screw is 180-220rpm, and the temperature of each area in a plasticizing area is as follows: the first zone is 85-90 ℃, the second zone is 105-110 ℃, the third zone is 115-125 ℃, the fourth zone is 100-105 ℃, and the fifth zone is 90-95 ℃; and then carrying out second plasticizing, wherein the rotating speed of the screw is 120-150rpm, and the temperature of each area of the extrusion molding area is as follows: the temperature of the first zone is 85-90 ℃, the temperature of the second zone is 85-90 ℃, and the temperature of the machine head is 105-;
step three, preparing the plastic into cylindrical particles with the diameter of 3.5mm multiplied by the height of 3mm under the conditions that the temperature is 105-115 ℃ and the pressure is 5.0-7.0MPa, and cooling the cylindrical particles to the room temperature by purified water;
step four, dehydrating the cylindrical particles at the rotating speed of 1080-;
drying the dehydrated material by drying equipment at the temperature of 45-50 ℃ to obtain the graphene-containing polyolefin high-semiconductive shielding material for the cable, and naturally cooling to room temperature;
step six, adding the polyolefin high-semiconductive shielding material into an extruder, heating, extruding and forming to form a shielding layer (2), wherein the heating temperature is 110-;
the drying equipment comprises the following working steps:
putting the dehydrated material into a drying barrel (500), starting a heating element for heating, starting an air cylinder (31) to drive a movable plate (32) to descend until a stirring shaft (36) is inserted into the drying barrel (500), starting a motor II (33) to rotate to drive a rotating shaft IV (34) to rotate, and driving the stirring shaft (36) to rotate by the rotating shaft IV (34) to stir and dry;
step two, a motor I (11) is started to rotate, a driving wheel (12) is driven to rotate through a belt, the driving wheel (12) drives a rotating shaft I (18) to rotate, the rotating shaft I (18) drives a gear I (20) to rotate, the gear I (20) drives a gear II (21) to rotate, the gear II (21) drives a bevel gear I (22) and a rotating shaft III (28) to rotate, the bevel gear I (22) is meshed with a bevel gear II (23) to be connected and further drives the bevel gear II (23) to rotate, the bevel gear II (23) drives a half moon wheel (25) to rotate, the half moon wheel (25) drives a rotating wheel (26) and a clamping column (27) to rotate, the clamping column (27) is matched with a clamping groove (30), the half moon wheel (25) is matched with a rotating fan blade (29) to further drive the rotating fan blade (29) to rotate, the rotating fan blade (29) drives the rotating shaft II (19) to rotate, and the rotating, meanwhile, the rotating shaft III (28) drives the movable block (17) to rotate, the movable block (17) drives the rocker (16) to rotate, and the rocker (16) drives the lifting plate (13) to lift so as to drive the cross-shaped inserted rod (14) to lift;
step three, opening a valve, enabling the dried materials to enter a screen (42) through a discharge pipe, when the screen (42) rotates to the position below a cross-shaped inserted rod (14), inserting the cross-shaped inserted rod (14) into the screen (42), starting a driving motor, driving the cross-shaped inserted rod (14) to rotate, further driving the screen (42) to rotate, and screening the materials by the screen (42);
and step four, after the materials are screened, taking down the screen (42) and the collecting cylinder (41), and obtaining the graphene-containing polyolefin high-semiconductive shielding material for the cable.
3. The direct current cable for the electric vehicle conduction charging system according to claim 2, wherein the antioxidant is 4,4' -thiobis (6-tert-butyl-3-methylphenol).
4. The direct current cable for the electric vehicle conduction charging system according to claim 2, wherein the particle size of the graphene powder is less than 10 μm.
5. The direct current cable for the electric vehicle conduction charging system according to claim 2, wherein the steps comprise ethylene-vinyl acetate copolymer EVA 86% and graphene powder 8%.
CN202010973565.3A 2020-09-16 2020-09-16 Direct current cable for electric automobile conduction charging system Pending CN112103004A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010973565.3A CN112103004A (en) 2020-09-16 2020-09-16 Direct current cable for electric automobile conduction charging system

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Application Number Priority Date Filing Date Title
CN202010973565.3A CN112103004A (en) 2020-09-16 2020-09-16 Direct current cable for electric automobile conduction charging system

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103739929A (en) * 2014-01-10 2014-04-23 江苏中超电缆股份有限公司 Graphene-containing polyolefin high semi-conductive shielding material for cable and preparation method thereof
US20170233298A1 (en) * 2011-11-29 2017-08-17 Corning Incorporated Apparatus and method for skinning articles
CN208323893U (en) * 2018-03-30 2019-01-04 南京鸿加源机械科技有限公司 The screening dehydration device of extruding granulator
CN210443305U (en) * 2019-09-04 2020-05-01 江苏启盛线缆有限公司 High-strength high-temperature-resistant cable

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170233298A1 (en) * 2011-11-29 2017-08-17 Corning Incorporated Apparatus and method for skinning articles
CN103739929A (en) * 2014-01-10 2014-04-23 江苏中超电缆股份有限公司 Graphene-containing polyolefin high semi-conductive shielding material for cable and preparation method thereof
CN208323893U (en) * 2018-03-30 2019-01-04 南京鸿加源机械科技有限公司 The screening dehydration device of extruding granulator
CN210443305U (en) * 2019-09-04 2020-05-01 江苏启盛线缆有限公司 High-strength high-temperature-resistant cable

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