WO2022120905A1 - Procédé de production de câble de petit diamètre de brin de forme spéciale de haute précision - Google Patents

Procédé de production de câble de petit diamètre de brin de forme spéciale de haute précision Download PDF

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WO2022120905A1
WO2022120905A1 PCT/CN2020/136651 CN2020136651W WO2022120905A1 WO 2022120905 A1 WO2022120905 A1 WO 2022120905A1 CN 2020136651 W CN2020136651 W CN 2020136651W WO 2022120905 A1 WO2022120905 A1 WO 2022120905A1
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zone
cable
conductor
semi
speed
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PCT/CN2020/136651
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English (en)
Chinese (zh)
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汤陈旦
夏正军
李斌
祝军
梁福才
袁杰
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江苏上上电缆集团有限公司
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Publication of WO2022120905A1 publication Critical patent/WO2022120905A1/fr

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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
    • H01B7/0009—Details relating to the conductive cores
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • 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
    • H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
    • 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
    • H01B13/148—Selection of the insulating material therefor
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring

Definitions

  • the invention relates to a high-precision small-diameter cable production method for special-shaped strands of high-speed rail transit, and belongs to the technical field of cable manufacturing.
  • Cables for high-speed rail transit are used for power transmission in train operation.
  • the supply cable along the line is used to supply the long stator of the traction motor.
  • Each single-track railway has two sets of independent three-phase cables to supply power to the long stators of the motors on both sides of the high-speed railway.
  • Each phase consists of stranded conductors to reduce cable reactance. Due to the special design, the cable presents an "S"-shaped wiring in the track, which needs to meet the characteristics of small bending radius, UV resistance, corrosion resistance, vibration resistance, aging resistance, flame retardant, and light weight.
  • the outer diameter of the cable is required to be small, it can be laid in the stator slot without falling off, and the overall structure of the cable is relatively fixed, so it is difficult to use additional function/performance layers to the cable to improve the applicable performance of the cable. Therefore, it is necessary to improve the accuracy of the product through technological methods in the production process.
  • the "a kind of transportation cable" with the announcement number of CN210667842U in order to ensure the use, it is necessary to control the outer diameter of the finished cable to be as small as possible to ensure that the cable can be laid in the stator slot and not fall off.
  • the present invention proposes a method for producing high-precision special-shaped strands and small-diameter cables.
  • the method can realize high-precision production of cable products based on existing equipment and molds through the control of the production process. Specifically:
  • a method for producing high-precision special-shaped strand small-diameter cables comprising the steps of:
  • Described step 1) comprises:
  • the aluminum alloy rod is drawn into fan-shaped monofilament, Z-shaped monofilament and S-shaped monofilament by corresponding wire drawing dies;
  • Wire drawing process The aluminum rod is passed through 11 wire drawing dies in sequence, and the arc surface of the single wire corresponds to the arc groove of the die hole, so as to ensure the stable force of the aluminum wire and no deviation of the cross section of the single wire;
  • step 1.2) Take the three kinds of monofilaments obtained in step 1.1) and twist them to form a conductor, and the fan-shaped monofilament is made into the inner layer of the conductor; the Z-shaped monofilament and the S-shaped monofilament are sequentially wrapped outside the inner layer of the conductor;
  • n there are n layers of conductors from the inside to the outside, the inner layer of the conductor is the first layer, and n is a natural number; the twisting directions of the conductors of the adjacent layers are opposite; from the second layer, the cross-section of the monofilament of the conductors of the adjacent layers is a mirror image Symmetrical, and finally the nth layer conductor is made to obtain the cable conductor;
  • the aluminum rod is drawn into a special-shaped monofilament, and then the special-shaped monofilament is twisted into a circular shape in sequence through the twisting process. Explosion occurs, ensuring the tightness of the conductor.
  • the inner layer of the conductor is made of 4 fan-shaped monofilaments
  • the middle layer of the conductor is composed of multiple Z-shaped monofilaments
  • the outer conductor layer is composed of multiple S-shaped monofilaments
  • the fan-shaped monofilament, the Z-shaped monofilament and the S-shaped monofilament are all the aluminum rods are sequentially inserted into 11 corresponding wire drawing dies according to the sequence, and the monofilament arc surfaces are corresponding to the arc grooves of the die holes.
  • the parameters of the wire drawing machine include:
  • Fan-shaped monofilament the speed ratio of the constant speed wheel is 1.19, the diameter of the finished die is 4.20mm, the wire pitch is 0.1mm, and the wire drawing speed is 8m/s;
  • the speed ratio of the constant speed wheel is 1.16, the diameter of the finished die is 3.30mm, the wire pitch is 0.1mm, and the wire drawing speed is 10m/s;
  • the speed ratio of the constant speed wheel is 1.16, the diameter of the finished die is 3.29mm, the wire pitch is 0.1mm, and the wire drawing speed is 12m/s;
  • the parameters of the stranding machine include: the rotational speed of the inner layer of the stranded conductor is 40 ⁇ 45r/min; the rotational speed of the middle layer of the stranded conductor is 30 ⁇ 45 r/min. 35r/min; the rotational speed of the outer layer of the stranded conductor is 30-33r/min; the line speed of the finished product is 7-8m/min;
  • the temperature in the heating stage is 500°C, and the heating time is 30-40min;
  • the temperature in the heat preservation stage is 500°C, and the heat preservation time is 3h;
  • the cooling rate in the cooling stage is 40°C/h, and the cooling time is 12h.
  • the steps 2) to 4) are realized by a three-layer co-extrusion process:
  • the temperature zone of the first extruder extruding semi-conductive chloroprene rubber is controlled as follows: the first zone is 50-60°C, the second zone is 55-65°C, the third zone is 65-70°C, the fourth zone is 80-90°C, and the fifth zone is 90-90°C. 100°C; the first zone is the feeding section, the second and third zones are the plasticizing section, and the fourth and fifth zones are the homogenizing section;
  • the temperature zone of the second extruder for extruding ethylene-propylene rubber is controlled as follows: 50-60°C for the first zone, 55-65°C for the second zone, 65-70°C for the third zone, 65-75°C for the fourth zone, and 75-80°C for the fifth zone ;
  • the first zone is the feeding section, the second and third zones are the plasticizing section, and the fourth and fifth zones are the homogenizing section;
  • the temperature zone of the third extruder extruding semi-conductive chloroprene rubber is controlled as follows: the first zone is 50-60°C, the second zone is 55-65°C, the third zone is 65-70°C, the fourth zone is 80-90°C, and the fifth zone is 90-90°C. 100°C; the first zone is the feeding section, the second and third zones are the plasticizing section, and the fourth and fifth zones are the homogenizing section;
  • the steam pressure during production is 8-12 bar
  • the production speed is 5-6 m/min
  • the screw speed of the first extruder is 15-20 r/min
  • the screw speed of the second extruder is 8-12 r/min
  • the third The screw speed of the extruder is 8 to 12 r/min.
  • water is cooled in a cold water tank, and the cooling time is 15 minutes; the water temperature of the cold water tank is controlled to be 5-10°C.
  • the semi-conductive neoprene rubber is extruded in the fourth rubber extruder, and the temperature zone of the fourth rubber extrusion machine is controlled as follows: the first zone is 50-60°C, the second zone is 55-65°C, and the third zone is 55-65°C. Zone 65 ⁇ 70°C, zone 4 65 ⁇ 75°C, zone 5 75 ⁇ 80°C; Zone 1 is feeding section, Zone 2 and Zone 3 are plasticizing section, Zone 4 and Zone 5 are homogenizing section;
  • the steam pressure is 7 ⁇ 8bar
  • the production speed is 5 ⁇ 6m/min
  • the screw speed of the fourth extruder is 18 ⁇ 20r/min;
  • the cooling time is 20min; the water temperature of the cold water tank is controlled to 5 ⁇ 10 °C.
  • the nanoscale semi-conductive glue is applied online, and the coating step is: the cable is routed on the coating machine, the semi-conductive glue is sprayed, and the infrared heating tube is heated and dried cured.
  • the traditional semi-conductive layers of cables are mostly made of films or tapes covered with nano-scale semi-conductive layers (such as polyester films, semi-conductive non-woven fabrics), which are wrapped outside the cables by wrapping.
  • nano-scale semi-conductive layers such as polyester films, semi-conductive non-woven fabrics
  • this method increases the outer diameter of the cable.
  • the method of directly coating the nanoscale semiconducting glue is adopted.
  • glue products are used to manufacture nanoscale semi-conductive films, and are mainly mixtures of oily acrylic emulsion and ethyl ester containing nanocarbon black or carbon pipes.
  • the linear speed of the cable is 4-5m/min, and the curing time of the glue is 5min.
  • the thickness of the semi-conductive nano-coating obtained by this process can reach 5-50 ⁇ m, which is very thin and has good firmness.
  • the viscosity of the semi-conductive glue is controlled within 15 to 18 seconds (Enzl viscosity), and the electric pressure cylinder is used to stir evenly at a uniform speed;
  • the cable conveying speed is synchronized with the spraying pressure, the cable conveying speed is 4-5m/min, and the spraying pressure is 0.8-1MPa, to ensure that the glue thickness of each surface of the cable is uniform;
  • Control of drying temperature The infrared heating tube is heated and dried, and the curing heating temperature is 200 °C, and the surface temperature of the cable cross section is uniform.
  • Cable conveying During the spraying process, the cable is always located in the center of the sprayer to prevent the coating from being scratched and the thickness is uniform.
  • the aluminum alloy used for the conductor is AA8000 series aluminum alloy. Used to improve mechanical strength and creep resistance.
  • the control deviation of the outer diameter of the cable conductor is ⁇ 0.1mm
  • the control deviation of the outer diameter of the insulated core is ⁇ 0.2mm
  • the control deviation of the outer diameter of the finished cable is ⁇ 0.2mm, which ensures that the cable can be laid in the stator slot. Does not fall off.
  • the conductor By controlling the annealing process of the conductor, the conductor has the advantages of high flexibility, small bending stress, no deformation, no looseness, and creep resistance after laying. Moreover, after testing, the elongation at break of the center conductor is 25% to 35%.
  • the cable produced by the production method of the high-precision special-shaped strand small-diameter cable is used for power supply of the long stator of the traction motor of the high-speed rail transit.
  • the cable prepared by this method is suitable for power transmission of high-speed rail transit. It not only strictly controls the outer diameter, but also has reliable electrical properties (such as insulation properties such as voltage resistance), and also has excellent bending properties, weather resistance, flame retardancy, etc. Features.
  • the insulating shielding layer, semi-conducting sheath layer and semi-conducting nano-coating are integrated into one structure, and the surface resistance of the finished cable is not more than 200 ⁇ . It can effectively reduce the induced current, capacitive current and leakage current of the cable during operation, and ensure the safety of the cable during long-term operation.
  • the cable In order to meet the special application environment of high-speed rail transit line track laying, the cable needs to meet the requirements of excellent electrical performance, weather resistance, and easy bending performance.
  • This special cable adopts special-shaped annealed aluminum conductor, and the central layer is composed of four 90° fan-shaped monofilament strands; the secondary inner layer is composed of Z-shaped monofilament stranding; the outer layer is composed of S-shaped monofilament stranding; Annealed, the conductor has high flexibility, low bending stress, no deformation, no looseness, creep resistance, etc. Because the material can meet the requirements of high voltage performance, it can meet the low temperature resistance of -40 °C and the high temperature resistance of 105 °C.
  • the high-strength rubber is used as the sheath material and adopts a single-layer structure, which can meet the requirements of weather resistance and semi-conductivity under the condition of high mechanical properties.
  • the special application environment has high requirements on the outer diameter of the cable, and at the same time, in order to meet the requirements of the embedded part of the cable embedded in the stator core, the requirement of minimum deviation of the outer diameter of the cable is required.
  • the method and the prepared cable have excellent outer diameter consistency.
  • the control deviation of the outer diameter of the cable conductor is ⁇ 0.1mm
  • the control deviation of the outer diameter of the insulated core is ⁇ 0.2mm
  • the outer diameter of the finished cable is ⁇ 0.2mm.
  • the control deviation is ⁇ 0.2mm, which ensures that the cable can be laid in the stator slot without falling off.
  • FIG. 1 is a schematic diagram of a radial cross-sectional view of the conductor of the cable of this embodiment.
  • FIG. 2 is a schematic diagram of the cross-sectional structure of the cable of this embodiment.
  • conductor inner layer 1 conductor middle layer 2, conductor outer layer 3, Z-shaped monofilament 4, sector-shaped monofilament 5, S-shaped monofilament 6, conductor 7, conductor shielding layer 8, insulating layer 9, insulating shielding layer 10.
  • Semi-conductive sheath layer 11 semi-conductive nano-coating layer 12 .
  • the high-precision special-shaped strand small-diameter cable obtained by this manufacturing method has a structure as follows: conductor 7 and conductor shielding layer 8 wrapped around conductor 7, insulating layer 9, insulating shielding layer 10, semiconducting A cable composed of a sheath layer 11 and a semiconducting nanocoating 12 .
  • This cable is used to supply power to the long stator of traction motors used in high-speed rail transit.
  • the diameter of the conductor 7 is in the range of 19.5-20.5 mm; the thickness of the insulating layer 9 is in the range of 5.2-5.8 mm; the thickness of the semi-conductive sheath layer 11 is in the range of 1.8-2.4 mm; The thickness of layer 12 is in the range of 5-50 ⁇ m;
  • the conductor 7 is made of aluminum alloy; the conductor shielding layer 8 is made of semiconductive neoprene; the insulating layer 9 is made of ethylene propylene rubber; the insulating shielding layer 10 is made of semiconductive neoprene. It is composed of rubber; the sheath material of the semi-conductive sheath layer 11 is composed of semi-conductive neoprene rubber extruded;
  • the conductor 7 is divided into layers 1 to n from the inside to the outside, and n is a natural number (three layers in this example);
  • They are composed of a plurality of identical monofilaments with a "Z"-shaped or "S"-shaped cross-section, which are spliced and twisted with each other; the stranding directions of the monofilaments of the adjacent conductors are opposite; the monofilaments of the adjacent conductors are mirror images Symmetrical;
  • any special-shaped monofilament is extruded from aluminum alloy monofilament.
  • the pitch-to-diameter ratio of the monofilament strands that constitute each layer of conductors is 10 to 18 times, (the outermost layer has the smallest pitch-to-diameter ratio to ensure that the conductors are tight and not loose).
  • the conductor 7 is a conductor made of an aluminum alloy rod by drawing, twisting and annealing.
  • the conductor shielding layer 8 is a shielding layer made of semi-conductive material (semi-conductive chloroprene rubber) through the process of extruding rubber and vulcanizing.
  • the insulating layer 9 is an insulating layer made of insulating material (ethylene propylene rubber) through the process of extruding rubber and vulcanizing.
  • the insulating shielding layer 10 is an insulating shielding layer made of semi-conductive material (semi-conductive chloroprene rubber) through the process of extruding rubber and vulcanizing.
  • the semi-conductive sheath layer 11 is a sheath layer obtained from a sheath material (semi-conductive neoprene) through a process of extruding rubber and vulcanizing.
  • the semi-conductive nano-coating layer 12 is a nano-scale coating made of semi-conductive glue through a spraying process.
  • the cable produced by the production method of the high-precision special-shaped strand small-diameter cable is used for power supply of the long stator of the traction motor of the high-speed rail transit.
  • the method for producing a high-precision special-shaped strand small-diameter cable includes the following steps: 1) manufacturing a conductor 7 of the cable; 2) extruding semiconducting neoprene rubber to make a conductor shielding layer 8; 3) extruding ethylene-propylene rubber to make an insulating layer 9; 4)
  • the insulating shielding layer 10 is made by extruding semiconducting neoprene; 5)
  • the semiconducting sheath layer 11 is made by extruding semiconducting neoprene; Coating 12.
  • Described step 1) comprises:
  • the aluminum alloy rod is drawn into fan-shaped monofilament 5, Z-shaped monofilament 4 and S-shaped monofilament 6 by using corresponding wire-drawing dies;
  • Wire drawing process The aluminum rod is passed through 11 wire drawing dies in sequence, and the arc surface of the single wire corresponds to the arc groove of the die hole, so as to ensure the stable force of the aluminum wire and no deviation of the cross section of the single wire;
  • step 1.2) Three kinds of monofilaments obtained in step 1.1) are twisted to form conductor 7, and sector-shaped monofilament 5 is made into conductor inner layer 1; Z-shaped monofilament 4 and S-shaped monofilament 6 are sequentially wrapped outside conductor inner layer 1;
  • the conductor 7 has n layers from the inside to the outside, the inner layer 1 of the conductor is the first layer, and n is a natural number; the stranding directions of the monofilaments of the adjacent conductors are opposite; from the second layer, the monofilaments of the adjacent conductors
  • the cross section of the cable is mirror-symmetrical, and finally the nth layer conductor is made to obtain the conductor 7 of the cable;
  • step 1.2 On the metal wire continuous annealing production line, anneal the cable conductor obtained in step 1.2), wherein: the temperature in the heating stage is 500°C, and the heating time is 30-40min; the temperature in the heat preservation stage is 500°C, and the holding time is 3h ; The cooling rate in the cooling stage is 40°C/h, and the cooling time is 12h;
  • the steps 2) to 4) are realized by a three-layer co-extrusion process:
  • the temperature zone of the first extruder extruding semi-conductive chloroprene rubber is controlled as follows: the first zone is 50-60°C, the second zone is 55-65°C, the third zone is 65-70°C, the fourth zone is 80-90°C, and the fifth zone is 90-90°C. 100°C; the first zone is the feeding section, the second and third zones are the plasticizing section, and the fourth and fifth zones are the homogenizing section;
  • the temperature zone of the second extruder for extruding ethylene-propylene rubber is controlled as follows: 50-60°C for the first zone, 55-65°C for the second zone, 65-70°C for the third zone, 65-75°C for the fourth zone, and 75-80°C for the fifth zone ;
  • the first zone is the feeding section, the second and third zones are the plasticizing section, and the fourth and fifth zones are the homogenizing section;
  • the temperature zone of the third extruder extruding semi-conductive chloroprene rubber is controlled as follows: the first zone is 50-60°C, the second zone is 55-65°C, the third zone is 65-70°C, the fourth zone is 80-90°C, and the fifth zone is 90-90°C. 100°C; the first zone is the feeding section, the second and third zones are the plasticizing section, and the fourth and fifth zones are the homogenizing section;
  • the steam pressure during production is 8 ⁇ 12bar
  • the production speed is 5 ⁇ 6m/min
  • the screw speed of the first extruder is 15 ⁇ 20r/min
  • the screw speed of the second extruder is 8 ⁇ 12r/min
  • the third extruder screw speed is 8 ⁇ 12r/min. Rubber machine screw speed 8 ⁇ 12r/min;
  • the cooling time is 15min; the water temperature of the cold water tank is controlled to 5 ⁇ 10 °C.
  • the semi-conductive chloroprene rubber is extruded to make the semi-conductive sheath layer 11;
  • the semi-conductive neoprene rubber is extruded in the fourth rubber extruder, and the temperature zone of the fourth rubber extrusion machine is controlled as follows: the first zone is 50-60°C, the second zone is 55-65°C, and the third zone is 55-65°C. Zone 65 ⁇ 70°C, zone 4 65 ⁇ 75°C, zone 5 75 ⁇ 80°C; Zone 1 is feeding section, Zone 2 and Zone 3 are plasticizing section, Zone 4 and Zone 5 are homogenizing section;
  • the steam pressure is 7 ⁇ 8bar
  • the production speed is 5 ⁇ 6m/min
  • the screw speed of the fourth extruder is 18 ⁇ 20r/min;
  • the cooling time is 20min; the water temperature of the cold water tank is controlled to 5 ⁇ 10 °C.
  • the nanoscale semi-conductive glue is applied online, and the coating step is: the cable is routed on the coating machine, the semi-conductive glue is sprayed, and the infrared heating tube is heated and dried ; When gluing, the linear speed of the cable is 4 ⁇ 5m/min; the curing time of the glue is 5min.
  • the thickness of the semi-conductive nano-coating 12 is in the range of 5 to 50 ⁇ m, and is heated and dried by an infrared heating tube at 200 degrees Celsius;
  • Coating configuration adopt a two-component system, add curing agent and diluent to the coating, control the viscosity of the coating within 15-18 seconds, and use an electric pressure cylinder to stir evenly at a uniform speed;
  • the cable conveying speed is synchronized with the spraying pressure (the cable conveying speed is 4 ⁇ 5m/min, and the spraying pressure is 0.8 ⁇ 1MPa) to ensure that the glue thickness of each surface of the cable is uniform;
  • Cable conveying During the spraying process, the cable is always located in the center of the sprayer to prevent the coating from being scratched, and the thickness is uniform.
  • the fan-shaped monofilament 5, the Z-shaped monofilament 4 and the S-shaped monofilament 6 all pass the aluminum rods into 11 corresponding wire drawing dies according to the sequence, and the monofilament arc surface and the die hole arc are connected.
  • the parameters of the wire drawing machine include:
  • Fan-shaped monofilament 5 the speed ratio of the constant speed wheel is 1.19, the diameter of the finished die is 4.20mm, the wire pitch is 0.1mm, and the wire drawing speed is 8m/s;
  • Z-shaped monofilament 4 The speed ratio of the constant speed wheel is 1.16, the diameter of the finished die is 3.30mm, the wire pitch is 0.1mm, and the wire drawing speed is 10m/s;
  • S-shaped monofilament 6 The speed ratio of the constant speed wheel is 1.16, the diameter of the finished die is 3.29mm, the wire pitch is 0.1mm, and the wire drawing speed is 12m/s.
  • step 1.2 three kinds of monofilaments are twisted on the stranding machine, and the parameters of the stranding machine include:
  • the rotational speed of the inner layer 1 of the stranded conductor is 40 to 45 r/min; the rotational speed of the middle layer 2 of the stranded conductor is 30 to 35 r/min; the rotational speed of the outer layer 3 of the stranded conductor is 30 to 33 r/min;
  • the line speed of the finished product is 7-8m/min.
  • the control deviation of the outer diameter of the cable conductor is ⁇ 0.1mm
  • the control deviation of the outer diameter of the insulated core is ⁇ 0.2mm
  • the control deviation of the outer diameter of the finished cable is ⁇ 0.2mm, which ensures that the cable can be laid in the stator slot without falling off.
  • Softness control The hardness of the material is controlled, in which the hardness of the insulation and sheath material is ⁇ 70A.

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  • Manufacturing Of Electric Cables (AREA)

Abstract

L'invention concerne un procédé de production d'un câble de petit diamètre de brin de forme spéciale de haute précision, comprenant les étapes suivantes : 1) Fabriquer un conducteur de câble ; 2) extruder du néoprène semi-conducteur pour former une couche de blindage de conducteur ; 3) extruder du caoutchouc éthylène-propylène pour former une couche isolante ; 4) extruder le néoprène semi-conducteur pour former une couche de blindage isolante ; 5) extruder le néoprène semi-conducteur pour former une couche de gaine semi-conductrice ; et 6) revêtir de la colle semi-conductrice nanométrique pour former un nano-revêtement semi-conducteur. Dans le procédé, au moyen d'un processus d'usinage de conducteur spécifique, un processus d'extrusion de chaque couche fonctionnelle et similaire, le câble préparé présente la caractéristique de haute précision ; pendant ce temps, les performances de ceux-ci peuvent satisfaire les exigences de pose de câbles pour un transit de rail à grande vitesse. Ainsi, le problème technique d'amélioration de la précision du produit au moyen d'un procédé de traitement pendant la production est résolu.
PCT/CN2020/136651 2020-12-07 2020-12-16 Procédé de production de câble de petit diamètre de brin de forme spéciale de haute précision WO2022120905A1 (fr)

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CN115312271B (zh) * 2022-06-28 2024-06-28 江苏上上电缆集团有限公司 一种中压聚丙烯绝缘线芯的三层共挤生产方法

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