CN112466514A - Graphene high-voltage cable and preparation method thereof - Google Patents
Graphene high-voltage cable and preparation method thereof Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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Abstract
The invention discloses a graphene high-voltage cable which comprises three copper conductors which are distributed in a shape like a Chinese character 'pin' and are twisted with each other, a graphene outer shielding material layer used for wrapping the copper conductors, and a weather-resistant layer wrapping the surface of the graphene outer shielding material layer, wherein the weather-resistant layer comprises a PVC isolation sleeve covering the surface of the graphene outer shielding material layer, a steel belt covering the surface of the PVC isolation sleeve, and a polyvinyl chloride outer sheath covering the surface of the steel belt; according to the invention, the copper conductors are stranded, and the internal copper wire cores are stranded, so that the structure of each copper conductor is more stable, and in addition, the weather-resistant layer of the cable is matched with the graphene outer shielding material layer through the PVC isolation sleeve, the steel belt and the polyvinyl chloride outer sheath, so that the cable has high anti-interference strength, firm armoring and high tensile strength, and is suitable for laying various high-voltage power lines.
Description
Technical Field
The invention particularly relates to a graphene high-voltage cable and a preparation method thereof.
Background
With the continuous and high-speed development of national economy and the continuous improvement of the living standard of people, the demand on electric power is more and more increased. The insufficient supply of electric power energy has become one of the important factors restricting the sustainable and high-speed development of national economy in China. Therefore, it is imperative to develop high voltage transmission and to increase the voltage class of the transmission line. The cross-linked polyethylene cable in the field of high-voltage power transmission and transformation is popular with users due to high working temperature of the conductor, excellent electrical performance, large transmission capacity, simple structure, short manufacturing period, convenient use, and simple and convenient installation, laying and maintenance. In a high-voltage and ultrahigh-voltage cross-linked polyethylene insulated cable structure, an outer protective layer of the cable plays a certain role in protecting internal structural parts of the cable and simultaneously plays a part of insulation function, the traditional high-voltage and ultrahigh-voltage cable sheath structure is generally a single-layer extrusion structure of polyvinyl chloride plastic and polyethylene plastic, and then a layer of graphite powder is coated outside the traditional high-voltage and ultrahigh-voltage cable sheath structure to serve as a conductive layer.
At present, the cables on the market have the following problems: firstly, the plurality of wire cores are randomly twisted, so that although the performance stability of the cable can be improved, the occupied diameter of the cable is easily increased due to the random twisting of the wire cores, namely, a large amount of shielding materials and insulating materials are consumed when a shielding layer or an insulating layer is extruded; when the cable is formed by the conductors prepared from the wire cores, the conductors are usually twisted in order to improve the stability of the cable, but when the conductors of the irregularly-twisted wire cores are twisted, the problems of low stability, incompact compactness and inconvenience for cable connection are caused by insufficient twisting force of the cable due to the twisting direction; secondly, mode is extruded to protective material's individual layer to and the simple and easy of resistant time epidermis, can cause the interference killing feature of cable conductor to become low, and the armor is firm inadequately, and tensile strength is little.
Disclosure of Invention
In view of this, the present invention aims to provide a graphene high-voltage cable with a compact cable structure, high interference resistance, firm armoring and high tensile strength, and a cable manufacturing method for correspondingly improving the effect.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides a graphite alkene high tension cable line, includes three copper conductors that are the distribution of article font and strand each other for the outer shielding bed of material of graphite alkene of cladding copper conductor still includes the cladding and is in the outer shielding bed of material of graphite alkene is the resistant layer of waiting on the surface, resistant layer of waiting is including covering the outer shielding bed of material of graphite alkene is PVC isolation sleeve on the surface, covers PVC isolation sleeve surperficial steel band, and cover the surperficial polyvinyl chloride oversheath of steel band.
2. The graphene high-voltage cable line according to claim 1, wherein: the steel strip is a soft steel strip subjected to annealing treatment.
Furthermore, the copper conductor comprises a copper wire core and an insulating sheath coated on the copper wire core, the copper wire core is a central copper core, a first layer of twisted copper cores twisted around the central copper core, a second layer of twisted copper cores distributed around the first layer of twisted copper cores and having the twisting direction opposite to that of the first layer of twisted copper cores, and a third layer of twisted copper cores distributed around the second layer of twisted copper cores and having the twisting direction opposite to that of the second layer of twisted copper cores.
Further, the mutual twisting direction of the two copper conductors is twisted along the inclination direction of the third layer of twisted copper core.
Furthermore, the radii of the central copper core, the first layer of twisted copper core, the second layer of twisted copper core and the third layer of twisted copper core are consistent.
Furthermore, the insulating sheath comprises a graphene inner shielding material layer and a polyethylene insulating layer coated on the surface of the graphene inner shielding material layer.
Furthermore, the side of the graphene outer shielding material layer is provided with a through hole.
A preparation method of a graphene high-voltage cable comprises the following steps:
step one, preparing a copper wire core: taking 1 copper wire as an intermediate copper core, then taking 5 copper wires to perform anticlockwise twisting around the intermediate copper core to form a first-layer twisted copper core, then taking 11 copper wires to perform clockwise twisting around the intermediate copper core, tightly attaching the twisted copper wires to the first-layer twisted copper core to form a second-layer twisted copper core, finally taking 17 copper wires to perform anticlockwise twisting around the intermediate copper core, tightly attaching the twisted copper wires to the second-layer twisted copper core to form a third-layer twisted copper core, preparing a copper wire core, and coating an insulating sheath on the surface of the prepared copper wire core to obtain a copper conductor;
step two, taking the three copper conductors prepared in the step one, and then twisting the three copper conductors in the mutual twisting direction along the inclined direction of the third layer of twisted copper core under the action of a twisting machine to prepare a semi-finished product for later use;
step three, extrusion forming of the semi-finished graphene inner shielding material layer; adopting a 65 extruder to perform extrusion molding on the graphene composite high semi-conductive polyolefin semi-conductive material; the extrusion parameters for controlling 65 the extruder were: a material conveying section: 90-100 ℃; the temperature of the compression section is 100-120 ℃; the homogenization section is 130 ℃ and 140 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 140 ℃ and 150 ℃; the extrusion filter screen is 20/8/20 meshes; controlling the extrusion rate to be 20-70 m/min;
step four, continuously carrying out extrusion forming on the polyethylene insulating layer on the semi-finished product after the extrusion forming of the graphene inner shielding material layer is finished on the semi-finished product; adopting a 120 extruder to extrude and mold the polyethylene material; the extrusion parameters of the 120 extruder were controlled as follows: a material conveying section: 120-140 ℃; the temperature of the compression section is 140 ℃ and 165 ℃; the homogenization section is 170 ℃ and 190 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 190 ℃ to 210 ℃; the extrusion filter screen is 20/60/120/60/20 meshes; controlling the extrusion rate to be 20-70 m/min;
step five, extruding and forming the semi-finished graphene outer shielding material layer; adopting a 65 extruder to perform extrusion molding on the graphene composite high semi-conductive polyolefin semi-conductive material; the extrusion parameters for controlling 65 the extruder were: a material conveying section: 90-100 ℃; the temperature of the compression section is 100-120 ℃; the homogenization section is 130 ℃ and 140 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 140 ℃ and 150 ℃; the extrusion filter screen is 20/8/20 meshes; controlling the extrusion rate to be 20-70 m/min;
sixthly, after extrusion forming of the graphene outer shielding material layer is completed, placing the semi-finished product in a nitrogen cross-linking room, cross-linking for 6-8 hours at the temperature of not less than 80 ℃ and under the pressure of more than 0.1MPa, taking out, and then sequentially coating a PVC isolation sleeve and a steel belt;
seventhly, extruding and forming the semi-finished polyvinyl chloride outer sheath; adopting a 120 extruder to extrude and mold the polyethylene material; the extrusion parameters of the 120 extruder were controlled as follows: a material conveying section: 120-140 ℃; the temperature of the compression section is 140 ℃ and 165 ℃; the homogenization section is 170 ℃ and 190 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 190 ℃ to 210 ℃; the extrusion filter screen is 20/60/120/60/20 meshes; controlling the extrusion rate to be 20-70 m/min to obtain the cable;
and step eight, placing the extruded and formed cable in a steam room, and performing steam crosslinking for 6-8 hours under the conditions that the temperature is not lower than 95 ℃ and the pressure is greater than 0.1 MPa.
Further, the production speed of stranding each layer of copper wires of the copper wire core in the step 1 is 10-30m/min, and the tension is 500-4000N;
further, the extrusion forming of the graphene inner shielding material layer, the extrusion forming of the polyethylene insulating layer and the extrusion forming of the graphene outer shielding material layer in the third step to the fifth step are three-layer co-extrusion one-step forming by three extruders.
The technical effects of the invention are mainly reflected in the following aspects: according to the invention, the copper conductors are stranded, and the internal copper wire cores are stranded, so that the structure of each copper conductor is more stable, and in addition, the weather-resistant layer of the cable is matched with the graphene outer shielding material layer through the PVC isolation sleeve, the steel belt and the polyvinyl chloride outer sheath, so that the cable has high anti-interference strength, firm armoring and high tensile strength, and is suitable for laying various high-voltage power lines.
Drawings
Fig. 1 is a structural diagram of a graphene high-voltage cable according to the present invention;
fig. 2 is a structural view of the copper conductor of fig. 1.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in order to make the technical solution of the present invention easier to understand and understand.
In the present embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right", "left", "above", "back", "middle", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present embodiment, if the connection or fixing manner between the components is not specifically described, the connection or fixing manner may be a bolt fixing manner, a pin connecting manner, or the like, which is commonly used in the prior art, and therefore, details thereof are not described in the present embodiment.
Examples
The utility model provides a graphite alkene high tension cable, as shown in fig. 1, includes three copper conductor 1 that are the distribution of pin shape and strand each other for wrap the outer shielding bed of material 2 of graphite alkene of copper conductor 1, still include the cladding and wait to wait layer 3 on the outer shielding bed of material 2 surface of graphite alkene, the direction of two copper conductor 1 intertwists each other is stranded along the direction of third layer transposition copper core 114 slope, can improve the stability of copper conductor 1 transposition, and the third layer transposition copper core 114 of two copper conductor 1 continues to strand fixedly promptly. The weather-resistant layer 3 comprises a PVC isolation sleeve 31 covering the surface of the graphene outer shielding material layer 2, a steel strip 32 covering the surface of the PVC isolation sleeve 31, and a PVC outer sheath 33 covering the surface of the steel strip 32. Through-hole 21 has been seted up to graphite alkene outer shielding bed of material 2's avris, can make 1 mutual extrusion in-process of copper conductor through-hole 21, can cushion the extrusion through-hole 21, avoid the cable fracture to influence life.
As shown in fig. 2, the copper conductor 1 includes a copper wire core 11 and an insulating sheath 12 covering the copper wire core 11, the copper wire core 11 is a central copper core 111, a first layer twisted copper core 112 twisted around the central copper core 111, a second layer twisted copper core 113 distributed around the first layer twisted copper core 112 and having a twisted direction opposite to that of the first layer twisted copper core 112, and a third layer twisted copper core 114 distributed around the second layer twisted copper core 113 and having a twisted direction opposite to that of the second layer twisted copper core 113. The central copper core 111, the first layer stranded copper core 112, the second layer stranded copper core 113 and the third layer stranded copper core 114 have the same radius. The insulating sheath 12 includes a graphene inner shielding material layer 121, and a polyethylene insulating layer 122 coated on the surface of the graphene inner shielding material layer 121.
In this embodiment, the steel strip 32 is a soft steel strip subjected to annealing treatment.
A preparation method of a graphene high-voltage cable comprises the following steps:
step one, preparing a copper wire core 11: taking 1 copper wire as an intermediate copper core 111, then taking 5 copper wires to perform anticlockwise twisting around the intermediate copper core 111 to form a first layer twisted copper core 112, then taking 11 copper wires to perform clockwise twisting around the intermediate copper core 111, tightly attaching the 11 copper wires to the first layer twisted copper core 112 to form a second layer twisted copper core 113, finally taking 17 copper wires to perform anticlockwise twisting around the intermediate copper core 111, tightly attaching the 17 copper wires to the second layer twisted copper core 113 to form a third layer twisted copper core 114, preparing a copper wire core 11, and coating a layer of insulating sheath 12 on the surface of the prepared copper wire core 11 to obtain a copper conductor 1;
step two, taking the three copper conductors 1 prepared in the step one, and twisting the three copper conductors 1 in the mutual twisting direction along the inclined direction of the third layer of twisted copper core 114 under the action of a twisting machine to prepare a semi-finished product for later use;
step three, extrusion forming of the semi-finished graphene inner shielding material layer 121; adopting a 65 extruder to perform extrusion molding on the graphene composite high semi-conductive polyolefin semi-conductive material; the extrusion parameters for controlling 65 the extruder were: a material conveying section: 90-100 ℃; the temperature of the compression section is 100-120 ℃; the homogenization section is 130 ℃ and 140 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 140 ℃ and 150 ℃; the extrusion filter screen is 20/8/20 meshes; controlling the extrusion rate to be 20-70 m/min;
step four, continuously carrying out extrusion forming on the polyethylene insulating layer 122 on the semi-finished product after the extrusion forming of the graphene inner shielding material layer 121 is completed on the semi-finished product; adopting a 120 extruder to extrude and mold the polyethylene material; the extrusion parameters of the 120 extruder were controlled as follows: a material conveying section: 120-140 ℃; the temperature of the compression section is 140 ℃ and 165 ℃; the homogenization section is 170 ℃ and 190 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 190 ℃ to 210 ℃; the extrusion filter screen is 20/60/120/60/20 meshes; controlling the extrusion rate to be 20-70 m/min;
step five, extruding and forming the semi-finished graphene outer shielding material layer 2; adopting a 65 extruder to perform extrusion molding on the graphene composite high semi-conductive polyolefin semi-conductive material; the extrusion parameters for controlling 65 the extruder were: a material conveying section: 90-100 ℃; the temperature of the compression section is 100-120 ℃; the homogenization section is 130 ℃ and 140 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 140 ℃ and 150 ℃; the extrusion filter screen is 20/8/20 meshes; controlling the extrusion rate to be 20-70 m/min;
sixthly, after extrusion forming of the graphene outer shielding material layer 2 is completed, placing the semi-finished product in a nitrogen cross-linking chamber, cross-linking for 6-8 hours at the temperature of not less than 80 ℃ and under the pressure of more than 0.1MPa, taking out, and then sequentially coating the PVC isolation sleeve 31 and the steel belt 32;
seventhly, extruding and forming the semi-finished polyvinyl chloride outer sheath 33; adopting a 120 extruder to extrude and mold the polyethylene material; the extrusion parameters of the 120 extruder were controlled as follows: a material conveying section: 120-140 ℃; the temperature of the compression section is 140 ℃ and 165 ℃; the homogenization section is 170 ℃ and 190 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 190 ℃ to 210 ℃; the extrusion filter screen is 20/60/120/60/20 meshes; controlling the extrusion rate to be 20-70 m/min to obtain the cable;
and step eight, placing the extruded and formed cable in a steam room, and performing steam crosslinking for 6-8 hours under the conditions that the temperature is not lower than 95 ℃ and the pressure is greater than 0.1 MPa.
In this embodiment, the production speed of twisting each layer of copper wires of the copper wire core 11 in the step 1 is 10-30m/min, and the tension is 500-;
in this embodiment, the extrusion molding of the graphene inner shielding material layer 121, the extrusion molding of the polyethylene insulating layer 122, and the extrusion molding of the graphene outer shielding material layer 2 in the third to fifth steps are three-layer co-extrusion one-step molding by three extruders.
The technical effects of the invention are mainly reflected in the following aspects: according to the invention, the copper conductors are stranded, and the internal copper wire cores are stranded, so that the structure of each copper conductor is more stable, and in addition, the weather-resistant layer of the cable is matched with the graphene outer shielding material layer through the PVC isolation sleeve, the steel belt and the polyvinyl chloride outer sheath, so that the cable has high anti-interference strength, firm armoring and high tensile strength, and is suitable for laying various high-voltage power lines.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.
Claims (10)
1. The utility model provides a graphite alkene high tension cable line, includes three copper conductors that are the distribution of article font and strand each other for wrap the outer shielding bed of material of graphite alkene of copper conductor, its characterized in that: still including the cladding at the outer shielding bed of material layer surface of graphite alkene is on resistant time layer, resistant time layer is including covering the outer shielding bed of material PVC isolation sleeve on the surface of graphite alkene covers the steel band on PVC isolation sleeve surface, and covers the polyvinyl chloride oversheath on steel band surface.
2. The graphene high-voltage cable line according to claim 1, wherein: the steel strip is a soft steel strip subjected to annealing treatment.
3. The graphene high-voltage cable line according to claim 1, wherein: the copper conductor comprises copper wire cores and an insulating sheath coated on the copper wire cores, the copper wire cores are respectively a central copper core, a first layer of stranded copper cores which are stranded around the central copper core, a second layer of stranded copper cores which are distributed around the first layer of stranded copper cores and have the stranding direction opposite to that of the first layer of stranded copper cores, and a third layer of stranded copper cores which are distributed around the second layer of stranded copper cores and have the stranding direction opposite to that of the second layer of stranded copper cores.
4. The graphene high-voltage cable wire according to claim 3, wherein: the mutual twisting direction of the two copper conductors is twisted along the oblique direction of the third layer of twisted copper core.
5. The graphene high-voltage cable wire according to claim 3, wherein: the radii of the central copper core, the first layer of stranded copper core, the second layer of stranded copper core and the third layer of stranded copper core are consistent.
6. The graphene high-voltage cable wire according to claim 3, wherein: the insulating sheath comprises a graphene inner shielding material layer and a polyethylene insulating layer coated on the surface of the graphene inner shielding material layer.
7. The graphene high-voltage cable line according to claim 1, wherein: the side of the graphene outer shielding material layer is provided with a through hole.
8. The preparation method of the graphene high-voltage cable wire according to claims 1 to 7, characterized by comprising the following steps:
step one, preparing a copper wire core: taking 1 copper wire as an intermediate copper core, then taking 5 copper wires to perform anticlockwise twisting around the intermediate copper core to form a first-layer twisted copper core, then taking 11 copper wires to perform clockwise twisting around the intermediate copper core, tightly attaching the twisted copper wires to the first-layer twisted copper core to form a second-layer twisted copper core, finally taking 17 copper wires to perform anticlockwise twisting around the intermediate copper core, tightly attaching the twisted copper wires to the second-layer twisted copper core to form a third-layer twisted copper core, preparing a copper wire core, and coating an insulating sheath on the surface of the prepared copper wire core to obtain a copper conductor;
step two, taking the three copper conductors prepared in the step one, and then twisting the three copper conductors in the mutual twisting direction along the inclined direction of the third layer of twisted copper core under the action of a twisting machine to prepare a semi-finished product for later use;
step three, extrusion forming of the semi-finished graphene inner shielding material layer; adopting a 65 extruder to perform extrusion molding on the graphene composite high semi-conductive polyolefin semi-conductive material; the extrusion parameters for controlling 65 the extruder were: a material conveying section: 90-100 ℃; the temperature of the compression section is 100-120 ℃; the homogenization section is 130 ℃ and 140 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 140 ℃ and 150 ℃; the extrusion filter screen is 20/8/20 meshes; controlling the extrusion rate to be 20-70 m/min;
step four, continuously carrying out extrusion forming on the polyethylene insulating layer on the semi-finished product after the extrusion forming of the graphene inner shielding material layer is finished on the semi-finished product; adopting a 120 extruder to extrude and mold the polyethylene material; the extrusion parameters of the 120 extruder were controlled as follows: a material conveying section: 120-140 ℃; the temperature of the compression section is 140 ℃ and 165 ℃; the homogenization section is 170 ℃ and 190 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 190 ℃ to 210 ℃; the extrusion filter screen is 20/60/120/60/20 meshes; controlling the extrusion rate to be 20-70 m/min;
step five, extruding and forming the semi-finished graphene outer shielding material layer; adopting a 65 extruder to perform extrusion molding on the graphene composite high semi-conductive polyolefin semi-conductive material; the extrusion parameters for controlling 65 the extruder were: a material conveying section: 90-100 ℃; the temperature of the compression section is 100-120 ℃; the homogenization section is 130 ℃ and 140 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 140 ℃ and 150 ℃; the extrusion filter screen is 20/8/20 meshes; controlling the extrusion rate to be 20-70 m/min;
sixthly, after extrusion forming of the graphene outer shielding material layer is completed, placing the semi-finished product in a nitrogen cross-linking room, cross-linking for 6-8 hours at the temperature of not less than 80 ℃ and under the pressure of more than 0.1MPa, taking out, and then sequentially coating a PVC isolation sleeve and a steel belt;
seventhly, extruding and forming the semi-finished polyvinyl chloride outer sheath; adopting a 120 extruder to extrude and mold the polyethylene material; the extrusion parameters of the 120 extruder were controlled as follows: a material conveying section: 120-140 ℃; the temperature of the compression section is 140 ℃ and 165 ℃; the homogenization section is 170 ℃ and 190 ℃; the temperature of the flange, the machine neck and the machine head is as follows: 190 ℃ to 210 ℃; the extrusion filter screen is 20/60/120/60/20 meshes; controlling the extrusion rate to be 20-70 m/min to obtain the cable;
and step eight, placing the extruded and formed cable in a steam room, and performing steam crosslinking for 6-8 hours under the conditions that the temperature is not lower than 95 ℃ and the pressure is greater than 0.1 MPa.
9. The method for preparing a graphene high-voltage cable wire according to claim 8, wherein the method comprises the following steps: in the step 1, the production speed of stranding each layer of copper wire of the copper wire core is 10-30m/min, and the tension is 500-4000N;
10. the method for preparing a graphene high-voltage cable wire according to claim 8, wherein the method comprises the following steps: and the extrusion forming of the graphene inner shielding material layer, the extrusion forming of the polyethylene insulating layer and the extrusion forming of the graphene outer shielding material layer in the third step to the fifth step are three-layer co-extrusion one-step forming by three extruders.
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| CN210271903U (en) * | 2019-06-22 | 2020-04-07 | 苏珩线缆南通有限公司 | High-performance low-smoke halogen-free flame-retardant low-noise cable |
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