CN113921201A - Composite RFID (radio frequency identification) temperature measurement intelligent power cable and cable manufacturing method - Google Patents

Composite RFID (radio frequency identification) temperature measurement intelligent power cable and cable manufacturing method Download PDF

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Publication number
CN113921201A
CN113921201A CN202111389252.4A CN202111389252A CN113921201A CN 113921201 A CN113921201 A CN 113921201A CN 202111389252 A CN202111389252 A CN 202111389252A CN 113921201 A CN113921201 A CN 113921201A
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China
Prior art keywords
layer
temperature measurement
rfid
conductor
cable
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Pending
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CN202111389252.4A
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Chinese (zh)
Inventor
李成钢
张建国
陶加贵
郑建华
高正平
丁扬
陈广
汪伦
蔡云峰
刘伟
储昭杰
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State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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Application filed by State Grid Jiangsu Electric Power Co Ltd, Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd filed Critical State Grid Jiangsu Electric Power Co Ltd
Publication of CN113921201A publication Critical patent/CN113921201A/en
Pending legal-status Critical Current

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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
    • H01B13/34—Apparatus or processes specially adapted for manufacturing conductors or cables for marking conductors or cables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/02—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine
    • G06K19/025—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine the material being flexible or adapted for folding, e.g. paper or paper-like materials used in luggage labels, identification tags, forms or identification documents carrying RFIDs
    • 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
    • H01B13/0006—Apparatus or processes specially adapted for manufacturing conductors or cables for reducing the size of conductors or cables
    • 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
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • H01B13/245—Sheathing; Armouring; Screening; Applying other protective layers by extrusion of metal 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
    • H01B13/34—Apparatus or processes specially adapted for manufacturing conductors or cables for marking conductors or cables
    • H01B13/345—Apparatus or processes specially adapted for manufacturing conductors or cables for marking conductors or cables by spraying, ejecting or dispensing marking fluid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0009—Details relating to the conductive cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0216—Two layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • 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
    • H01B7/36—Insulated conductors or cables characterised by their form with distinguishing or length marks
    • 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
    • H01B7/36—Insulated conductors or cables characterised by their form with distinguishing or length marks
    • H01B7/365—Insulated conductors or cables characterised by their form with distinguishing or length marks being indicia imposed on the insulation or conductor
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Engineering & Computer Science (AREA)
  • Insulated Conductors (AREA)

Abstract

The invention belongs to the technical field of power cables, and discloses a composite RFID temperature measurement intelligent power cable and a cable manufacturing method. The RFID temperature measurement electronic tag can detect the temperature of the cable in real time and meet the monitoring and early warning requirements.

Description

Composite RFID (radio frequency identification) temperature measurement intelligent power cable and cable manufacturing method
Technical Field
The invention relates to the technical field of power cables, in particular to a composite RFID (radio frequency identification) temperature measurement intelligent power cable and a cable manufacturing method.
Background
The development of market economy has increased the demand for electrical energy. The requirement of real-time monitoring can not be met through the traditional thermocouple local point temperature measurement technology in the operation of the power cable, and the analysis is carried out through the online temperature measurement technology, so that the line operation temperature measurement quality can be effectively improved, and the optimization construction of a power system is facilitated.
Disclosure of Invention
One object of the present invention is: the composite RFID radio frequency identification temperature measurement intelligent power cable and the cable manufacturing method are provided, and the operation of the cable can be monitored in real time.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the composite RFID temperature measurement intelligent power cable comprises a cable core, a plurality of RFID temperature measurement electronic tags and a sheath structure, wherein the sheath structure comprises an outer sheath layer, the outer sheath layer is sleeved on the periphery of the cable core, the plurality of RFID temperature measurement electronic tags are arranged between the cable core and the outer sheath layer, and the plurality of RFID temperature measurement electronic tags are arranged along the axial direction of the cable at intervals.
As an optional technical solution, the RFID temperature measurement electronic tag has a strip-shaped sheet structure.
As an optional technical solution, the distance between two adjacent RFID temperature measurement electronic tags is 1 m.
As an optional technical solution, the cable core includes a filling material and a plurality of wire cores, the plurality of wire cores are twisted with each other, and the filling material is filled between the wire cores and the sheath structure.
As an optional technical solution, the number of the wire cores is three.
As an optional technical solution, the wire core includes a conductor and a conductor shielding layer, and the conductor shielding layer is sleeved on the periphery of the conductor.
As an optional technical solution, the conductor is a copper conductor, and the copper conductor is formed by stranding a plurality of bare copper monofilaments; or, the conductor is an aluminum conductor; the aluminum conductor is formed by stranding a plurality of bare aluminum monofilaments.
As an alternative solution, the diameter of each bare copper monofilament ranges from 2.21mm to 3.50mm, and the diameter of the copper conductor ranges from 6.0mm to 34.1 mm;
each bare aluminum monofilament has a diameter ranging from 2.16mm to 4.30mm, and the aluminum conductor has a diameter ranging from 6.0mm to 34.0 mm.
As an optional technical solution, when the conductor is the aluminum conductor, if the cross section of the aluminum conductor is 70mm2When the pitch diameter ratio of the cable core is 22-28, if the cross section of the aluminum conductor is more than 70mm2The pitch-diameter ratio of the cable core is 25 to 35;
when the conductor is the copper conductor, the pitch-diameter ratio of the cable core is 25 to 35.
As an optional technical solution, the wire core further includes an insulating layer and an insulating shielding layer, the insulating layer is sleeved on the periphery of the conductor shielding layer, and the insulating shielding layer is sleeved on the periphery of the insulating layer.
As an optional technical solution, the thickness of the conductor shielding layer is 0.8mm, and the thickness of the insulation shielding layer is 1.0 mm.
As an optional technical solution, the conductor shielding layer and the insulation shielding layer are both made of an environment-friendly peroxide cross-linked semi-conductive shielding material by extrusion.
As an optional technical scheme, the environment-friendly peroxide crosslinking type semi-conductive shielding material comprises a polyolefin base stock, conductive carbon black, an antioxidant and a copper inhibitor.
As an optional technical solution, the wire core further includes a metal shielding layer, and the metal shielding layer is sleeved on the periphery of the insulation shielding layer.
As an optional technical solution, the metal shielding layer is made of soft copper overlapping wrapping.
As an optional technical scheme, the thickness of the metal shielding layer is not less than 0.10 mm.
As an optional technical solution, the evaluation overlapping rate of the metal shielding layer is not less than 15%, and the minimum overlapping area is not less than 5%.
As an optional technical scheme, the thickness of the insulating layer is 4.5 mm.
As an alternative solution, the insulating layer is made of an extruded cross-linked polyethylene material.
As an alternative solution, the cross-linked polyethylene material comprises polyethylene and peroxide.
As an optional technical scheme, the periphery of the cable core is further sleeved with a wrapping layer, and the wrapping layer is used for wrapping and limiting the cable core and the filling material.
As an optional technical scheme, the wrapping layer is formed by overlapping wrapping of non-hygroscopic strips.
As an optional technical solution, the thickness of the wrapping layer is 0.3 mm.
As an optional technical solution, the lapping rate of the lapping layer ranges from 15% to 25%.
As an optional technical scheme, the sheath structure includes the inner sheath layer, the inner sheath layer is located around the periphery of covering, the outer sheath layer is located the periphery of inner sheath layer, RFID radio frequency identification temperature measurement electronic tags set up in the inner sheath layer with between the outer sheath layer.
As an optional technical solution, the nominal thickness of the inner sheath layer is 1.8mm to 3.5 mm.
As an optional technical scheme, the thinnest point of the inner sheath layer is not less than 85-0.1 mm of the nominal value.
As an optional technical scheme, the nominal thickness of the outer sheath layer is 1.8mm to 3.5 mm.
As an optional technical scheme, the thinnest point of the outer sheath layer is not less than 85-0.1 mm of the nominal value.
As an optional technical solution, the inner sheath layer is made of environment-friendly polyethylene and polyvinyl chloride or polyolefin.
As an optional technical solution, the outer sheath layer is made of environment-friendly polyethylene and polyvinyl chloride or polyolefin.
As an optional technical solution, the sheath structure further includes an armor layer, and the armor layer is sheathed between the outer wall of the inner sheath layer and the inner wall of the outer sheath layer.
As an optional technical solution, the armor layer is made by gap lapping of metal tapes; or the armor layer is formed by wrapping a plurality of metal wires.
As an optional technical scheme, the thickness of the metal belt ranges from 0.4mm to 0.9mm, the gap rate of the metal belt ranges from 40% to 45%, and the sum of gaps among a plurality of metal wires does not exceed the diameter of one metal wire.
In a second aspect, there is provided a cable manufacturing method for manufacturing the composite RFID thermometric smart power cable described above, the cable manufacturing method comprising the steps of:
manufacturing a wire core;
stranding the wire core and a filling material together to obtain a cable core;
an armor layer wraps the periphery of the cable core;
attaching an RFID (radio frequency identification) temperature measurement electronic tag to the surface of the armor layer;
and an outer sheath layer is wrapped on the periphery of the armor layer attached with the RFID temperature measurement electronic tag.
As an optional technical solution, the steps are: attaching an RFID temperature measurement electronic tag on the surface of the armor layer specifically comprises the following steps:
the RFID radio frequency identification temperature measurement electronic tags are arranged on release paper in sequence, and the RFID radio frequency identification temperature measurement electronic tags on the release paper are obtained by adopting a pneumatic drag chain device;
the pneumatic drag chain is connected with the production line in series and started, and the RFID radio frequency identification temperature measurement electronic tags are sequentially attached to the surface of the armor layer according to the production sequence.
The invention has the beneficial effects that:
the invention provides a composite RFID (radio frequency identification) temperature measurement intelligent power cable and a cable manufacturing method.
Drawings
The invention is explained in further detail below with reference to the figures and examples;
fig. 1 is a schematic cross-sectional view of a cable according to an embodiment.
In fig. 1:
1. a conductor; 2. a conductor shield layer; 3. an insulating layer; 4. an insulating shield layer; 5. a metal shielding layer; 6. a filler material; 7. wrapping a covering; 8. an inner jacket layer; 9. an armor layer; 10. RFID radio frequency identification temperature measurement electronic tags; 11. an outer jacket layer.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an 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.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1, in a first aspect, the embodiment provides a composite RFID temperature measurement intelligent power cable, which includes a cable core, a plurality of RFID temperature measurement electronic tags 10 and a sheath structure, where the sheath structure includes an outer sheath layer 11, the outer sheath layer 11 is sleeved on the periphery of the cable core, the plurality of RFID temperature measurement electronic tags 10 are all disposed between the cable core and the outer sheath layer 11, and the plurality of RFID temperature measurement electronic tags 10 are arranged at intervals along the axial direction of the cable.
The composite RFID radio frequency identification temperature measurement intelligent power cable of the embodiment is more applied to middle and high voltage power transmission systems of 10KV and above.
The RFID temperature measurement electronic tag 10 is an intelligent chip of a radio frequency identification technology with a temperature measurement function, shares a central logic control circuit and an information storage unit, has an erasable function, supports high-frequency band work in a range of 13.0MHZ to 14.5MHZ, is combined with a cable for application, can automatically feed back temperature information data of the cable, and is convenient for on-line detection, analysis, monitoring and early warning. Set up RFID radio frequency identification temperature measurement electronic tags 10 between cable core and oversheath layer 11, can avoid the cable core when electrically conducting, RFID radio frequency identification temperature measurement electronic tags 10 is burnt out, can also avoid external interference factor direct action RFID radio frequency identification temperature measurement electronic tags 10 simultaneously, if sun insolate RFID radio frequency identification temperature measurement electronic tags 10 or rainwater leads to RFID radio frequency identification temperature measurement electronic tags 10's malfunctioning, the sheath structure can promote the waterproof performance and the mechanical protection performance of cable.
In practical application, most of medium and high voltage power transmission systems transmit power across regions, the length of a cable is long, the application radius distance of a single RFID temperature measurement electronic tag 10 is limited, and a plurality of RFID temperature measurement electronic tags 10 are arranged at intervals along the axial direction of the cable, so that the temperature information of the cable can be effectively transmitted back to a database.
Optionally, the RFID temperature measurement electronic tag 10 is manufactured by a manufacturing process technology combining dense copper etching with silver paste printing.
Optionally, the RFID temperature measurement electronic tag 10 is a strip-shaped sheet structure. The RFID temperature measurement electronic tag 10 adopts an anti-metal flexible high-temperature-resistant base material as a transfer carrier, and can normally work in an environment of 0-100 ℃.
In this example, mm is millimeters, cm is centimeters, m is meters, km is kilometers, Ω is ohms, bar is bars, kv is kilovolts.
Optionally, the distance between two adjacent RFID temperature measurement electronic tags 10 is 1 m.
Optionally, the cable core includes a filling material 6 and a plurality of cable cores, the plurality of cable cores are twisted with each other, and the filling material 6 is filled between the cable cores and the sheath structure. Specifically, the sinle silk sets up to three, and three sinle silk and 6 transposition of filling material guarantee that the appearance is round and tidy.
Optionally, the sinle silk includes conductor 1 and conductor shielding layer 2, and conductor shielding layer 2 cover is located the periphery of conductor 1.
The weighing cross section of the conductor 1 was 297mm2The outer diameter of the conductor 1 is 20.7 +/-0.2 mm, and the direct current resistance of the conductor 1 is less than 0.0601 omega/km under the condition of 20 ℃.
Optionally, the conductor 1 is a copper conductor, and the copper conductor is formed by stranding a plurality of bare copper monofilaments; or, the conductor 1 is an aluminum conductor; the aluminum conductor is formed by stranding a plurality of bare aluminum monofilaments.
Optionally, the diameter of each bare copper monofilament ranges from 2.21mm to 3.50mm, and the diameter of the copper conductor ranges from 6.0mm to 34.1 mm; each bare aluminum monofilament has a diameter in the range of 2.16mm to 4.30mm and the aluminum conductor has a diameter in the range of 6.0mm to 34.0 mm.
When the conductor 1 is an aluminum conductor, the cross section of the aluminum conductor is 70mm2And when the pitch diameter ratio is less than or equal to 22 and 28, the cross section of the aluminum conductor is more than 70mm2The pitch-diameter ratio of the cable core is 25 to 35;
when the conductor 1 is a copper conductor, the pitch ratio of the cable core is 25 to 35.
Optionally, the sinle silk still includes insulating layer 3 and insulating shielding layer 4, and the periphery of conductor shielding layer 2 is located to the insulating layer 3 cover, and the periphery of insulating layer 3 is located to insulating shielding layer 4 cover.
Optionally, the thickness of the conductor shielding layer 2 is 0.8mm, and the thickness of the insulation shielding layer 4 is 1.0 mm.
Optionally, the conductor shielding layer 2 and the insulation shielding layer 4 are both made of an environment-friendly peroxide cross-linked semi-conductive shielding material by extrusion.
Optionally, the environment-friendly peroxide cross-linked semiconductive shielding material comprises a polyolefin base material, conductive carbon black, an antioxidant and a copper inhibitor.
Optionally, the wire core further includes a metal shielding layer 5, and the metal shielding layer 5 is sleeved on the periphery of the insulation shielding layer 4.
Optionally, the metal shielding layer 5 is made of soft copper overlapping wrapping.
Optionally, the thickness of the metal shielding layer 5 is not less than 0.10 mm.
Optionally, the average overlapping rate of the metal shielding layer 5 is not less than 15%, and the minimum overlapping area is not less than 5%.
Optionally, the thickness of the insulating layer 3 is 4.5 mm.
Optionally, the insulating layer 3 is made of an extruded cross-linked polyethylene material.
Optionally, the crosslinked polyethylene material comprises polyethylene and a peroxide.
Optionally, the periphery of the cable core is further sleeved with a wrapping layer 7, and the wrapping layer 7 is used for wrapping and limiting the cable core and the filling material 6.
Optionally, the wrapping 7 is made of a non-hygroscopic tape lapped. The non-hygroscopic strip comprises a low-smoke halogen-free flame-retardant belt, wherein the low-smoke halogen-free flame-retardant belt adopts glass fiber as a base material, the base material is soaked in flame-retardant glue without halogen elements, and then the flame-retardant glue is cured and formed, so that the low-smoke halogen-free flame-retardant belt has high flame-retardant performance, and the oxygen index is more than 70%. In case of fire, the cable is burnt with less smoke and no halogen gas is released.
Optionally, the wrapping layer 7 has a thickness of 0.3 mm.
Optionally, the lapping rate of the lapping layer 7 ranges from 15% to 25%.
Optionally, the outer diameter of the wrapped layer 7 after wrapping is 96.0 +/-2 mm.
Optionally, the sheath structure still includes inner sheath layer 8, and the periphery around covering 7 is located to inner sheath layer 8 cover, and inner sheath layer 8's periphery is located to outer sheath layer 11 cover, and RFID radio frequency identification temperature measurement electronic tags 10 sets up between inner sheath layer 8 and outer sheath layer 11.
Optionally, the inner jacket layer 8 has a nominal thickness of 1.8mm to 3.5 mm.
Optionally, the thinnest point of the inner sheath layer 8 is not less than 85% -0.1mm of the nominal value.
Optionally, the nominal thickness of the outer jacket layer 11 is 1.8mm to 3.5 mm.
Optionally, the thinnest point of the outer sheath layer 11 is not less than 85% -0.1mm of the nominal value.
Optionally, the inner sheath layer 8 is made of environmentally friendly polyethylene and polyvinyl chloride or polyolefin. The polyethylene sheathing material can be prepared from environment-friendly polyethylene and polyvinyl chloride or polyolefin, the resistivity of the polyethylene sheathing material is not less than 1.0 multiplied by 1014 omega cm, and the dielectric strength is not less than 26 KV/mm.
The inner sheath layer 8 is made of an extruding machine with an extrusion opening diameter of 200mm, the temperatures of 1-9 temperature zones of the extruding machine are 148 ℃, 175 ℃, 178 ℃, 177 ℃, 176 ℃, 175 ℃, 176 ℃, 181 ℃ and 180 ℃, the temperatures of four temperature zones of the handpiece are 179 ℃, 178 ℃ and 179 ℃, the screw rotating speed of the extruding machine is 10 revolutions per minute, and the extruding current is 450 amperes.
Optionally, the outer diameter of the inner sheath layer 8 after wrapping is 101.0 +/-2 mm,
optionally, the outer sheath layer 11 is made of environment-friendly polyethylene and polyvinyl chloride or polyolefin, and the cable can prevent flame from spreading in case of fire. The outer diameter of the outer sheath layer 11 after extrusion is 115.0 +/-2 mm.
The outer sheath layer 11 is made by adopting an extruding machine with an extrusion opening diameter of 200mm, the temperatures of 1-9 temperature zones of the extruding machine are respectively 148 ℃, 175 ℃, 178 ℃, 177 ℃, 176 ℃, 175 ℃, 176 ℃, 181 ℃ and 180 ℃, the temperatures of four temperature zones of the handpiece are respectively 179 ℃, 178 ℃ and 179 ℃, the screw rotating speed of the extruding machine is 13.0 r/min, and the extruding current is 495A.
Optionally, the sheath structure further includes an armor layer 9, and the armor layer 9 is sleeved between the outer wall of the inner sheath layer 8 and the inner wall of the outer sheath layer 11.
Optionally, the armor layer 9 is formed by gap lapping of metal strips; alternatively, the armor layer 9 is made of several metal wires wrapped.
Optionally, the thickness of the metal strip ranges from 0.4mm to 0.9mm, the gap ratio of the metal strip ranges from 40% to 45%, and the sum of the gaps between the plurality of metal wires does not exceed the diameter of one metal wire. The metal belt effectively ensures the lateral pressure resistance protection capability of the cable, and the metal wire effectively ensures the longitudinal tensile resistance performance of the cable.
Optionally, the metal belt is a double-layer galvanized steel belt, the outer diameter of the double-layer galvanized steel belt after wrapping is 105.0 +/-2 mm,
in the manufacturing process of the metal strip, the lower pressure of a tractor is controlled to ensure that the cables in the production process are at the same horizontal height, the upper pressure of the tractor is 0.30 to 0.50 MPa, the tension pressure is 1.0 to 1.2 MPa, the take-up tension is 2500 to 4000N, and the tensile strength of the double-layer galvanized steel strip is not less than 295N/mm2The elongation is not less than 20 percent, and the mass of the double-layer galvanized steel strip is not less than 40g/m2。
In a second aspect, the present embodiment further provides a cable manufacturing method, where the cable manufacturing method is used to manufacture the composite RFID temperature measurement intelligent power cable, and the cable manufacturing method includes the following steps:
s100, manufacturing a wire core;
s200, twisting the wire core and the filling material 6 together to obtain a cable core;
s300, wrapping an armor layer 9 on the periphery of the cable core;
s400, attaching the RFID radio frequency identification temperature measurement electronic tag 10 to the surface of the armor layer 9;
s500, wrapping an outer sheath layer 11 on the periphery of the armor layer 9 attached with the RFID temperature measurement electronic tag 10.
Optionally, step S400 specifically includes:
s401, arranging the RFID radio frequency identification temperature measurement electronic tags 10 on release paper in sequence, and acquiring the RFID radio frequency identification temperature measurement electronic tags 10 on the release paper by adopting a pneumatic drag chain device;
s402, the pneumatic drag chain is connected with the production line in series and started, and the RFID radio frequency identification temperature measurement electronic tags 10 are sequentially attached to the surface of the armor layer 9 according to the production sequence.
Optionally, the RFID thermometric electronic tags 10 are arranged on the release paper in a matrix form of 2 columns by 14 rows.
Optionally, step S500 specifically includes:
s501, the RFID temperature measurement electronic tag 10 and the cable core wrapped with the armor layer 9 penetrate through a plastic extruding machine for extruding and wrapping the outer sheath layer 11.
Melting the environment-friendly polyethylene and the polyvinyl chloride or the polyolefin for manufacturing the outer sheath layer 11 in an extruder, and extruding the environment-friendly polyethylene and the polyvinyl chloride or the polyolefin through a head of the extruder on the outer wall of the cable manufactured in the step S402.
After step S501, step S502 is further included: the outer jacket layer 11 is cooled and molded.
After step S502, step S503 is further included: and spraying a mark at the installation position of the RFID temperature measurement electronic tag 10.
Optionally, step S503 specifically includes:
s5031, reading the RFID label information and identifying the position of the RFID radio frequency identification temperature measurement electronic label 10 through an RFID label reader-writer, and spraying the identification in a linkage manner through ink-jet printing equipment.
After obtaining the RFID tag information, the method further includes step S5032: and transmitting the RFID label information and the cable production information data to a database.
Optionally, step S100 specifically includes:
s101, drawing a copper rod with the diameter of 8mm into a copper monofilament with the diameter of 3.33 mm;
and S102, stranding the copper monofilaments layer by adopting a stranding machine.
Optionally, the tolerance requirement of the copper monofilament is 3.33 +/-0.01 mm, the elongation of the copper monofilament is greater than or equal to 37 percent, and the copper monofilamentThe electrical resistivity of the filament does not exceed 0.017241 omega mm2/m。
Optionally, step S102 specifically includes:
and S1021, sequentially twisting three layers of copper monofilaments by taking 1 copper monofilament as an axis and arranging 6, 12 and 18 copper monofilaments on each layer from inside to outside.
Optionally, the ratio of the twist pitch diameter of the copper monofilament at the outermost layer is less than or equal to 12.
Optionally, the wire core includes four layers of copper monofilaments, the number of the copper monofilaments in the first layer is 1, the number of the copper monofilaments in the second layer is 6, the number of the copper monofilaments in the third layer is 12, and the number of the copper monofilaments in the fourth layer is 18;
optionally, the stranding directions of the copper monofilaments on the second layer and the copper monofilaments on the fourth layer are both the left direction, and the stranding direction of the copper monofilaments on the third layer is the right direction; or the stranding directions of the copper monofilaments on the second layer and the copper monofilaments on the fourth layer are both right directions, and the stranding direction of the copper monofilaments on the third layer is left direction.
After step S102, step S103 is further included: the conductor shielding layer 2, the insulating layer 3 and the insulating shielding layer 4 are extruded by adopting a production mode of three-layer co-extrusion, dry-process crosslinking and continuous vulcanization to prepare an insulating wire core, so that the insulating purification degree of the cable and the quality of an extruded product are ensured.
Optionally, the insulated wire core is processed and produced by a vertical cross-linking production line, the average speed of the vertical cross-linking production line is 5.38 +/-0.3 meters per minute, and the vertical cross-linking production line can realize a production mode of three-layer co-extrusion, dry cross-linking and continuous vulcanization.
The insulating shielding layer 4 is extruded by an extruder with an extrusion opening diameter of 80mm, four layers of machine head filter screens are adopted, and each layer is 20 meshes, 120 meshes, 80 meshes and 20 meshes; the temperatures of the temperature zones 1 to 8 of the extruder are respectively 80 ℃, 100 ℃, 110 ℃, 112 ℃, 115 ℃, 116 ℃ and 118 ℃, the screw rotation speed of the extruder is 9.6 revolutions per minute, and the extrusion pressure is 345 bar.
Optionally, the insulating layer 3 is extruded by an extruder with an extrusion opening diameter of 80mm, and the filter screen of the machine head is four layers, wherein each layer is 20 meshes, 120 meshes, 80 meshes and 20 meshes; the temperatures of the temperature zones 1 to 8 of the extruder are respectively 80 ℃, 100 ℃, 110 ℃, 112 ℃, 115 ℃, 116 ℃ and 118 ℃, the screw rotation speed of the extruder is 6.0 revolutions per minute, and the extrusion pressure is 216 bar.
Optionally, the conductor shielding layer 2 is extruded by an extruder with an extrusion opening diameter of 80mm, the filter screen of the machine head is four layers, and each layer is 20 meshes, 120 meshes, 80 meshes and 20 meshes; the temperatures of 1-8 temperature zones of the extruder are respectively 80 ℃, 100 ℃, 110 ℃, 112 ℃, 115 ℃, 116 ℃ and 118 ℃, the screw rotation speed of the extruder is 8.1 revolutions per minute, and the extrusion pressure is 420 bar.
The dimensions of the insulating and shielding layer 4, the insulating layer 3 and the conductor and shielding layer 2 are respectively as follows: diameter 21.3mm, diameter 22.9mm and diameter 45.0mm,
optionally, the prepared insulated wire core is placed into a baking room at 70 +/-2 ℃ to be baked for 120 hours, and the baking starting time is counted when the surface temperature of the insulated wire core reaches 68 ℃.
Optionally, after step S103, step S104 is further included: and the copper strips are overlapped and wrapped on the periphery of the insulating wire core.
The thickness of the copper strip is 0.10mm, the width is 40mm, the lapping overlapping rate of the copper strip is 15-17%, and the outer diameter of the copper strip after lapping is 44.0 +/-0.1 mm.
In the manufacturing process of the insulated wire core, the lower pressure of a tractor is controlled to ensure that the cable in the production process is at the same horizontal height, the upper pressure of the tractor is 0.10 to 0.15 MPa, the tension pressure is 0.35 to 0.45 MPa, the take-up tension is 1500 to 3000N, the resistivity of the copper strip is not more than 0.017241 omega mm2/m。
Optionally, the cabling direction of the wire core and the filling material 6 is set to be right.
Optionally, the cabling mode of the wire core and the filling material 6 adopts back-twist cabling.
Optionally, the wire core and the filler material 6 have a cabling pitch to diameter ratio in the range of 25 to 35.
Optionally, the filler material 6 is a non-hygroscopic polypropylene reticulated tear fiber. The filling material 6 is aged for 240 hours under the temperature regulation of 100 +/-2 ℃ without embrittlement phenomenon. The filling material 6 wraps the periphery of the wire core, is tight and has no gap, and ensures that the finished cable section is not pulverized after an additional aging test.
Optionally, the roundness of the cable core after the filling material 6 is twisted with the cable core reaches more than 95%.
Optionally, after step S200, step S201 is further included: the periphery of the cable core is wrapped with a wrapping layer 7, and the periphery of the wrapping layer 7 is wrapped with an inner sheath layer 8.
The conductor shielding layer 2 and the insulation shielding layer 4 of the embodiment both adopt the environment-friendly peroxide crosslinking type semi-conductive shielding material, so that the important electrical performance index of the cable body is well ensured, namely, no detectable discharge exceeding the sensitivity (6pC) of the declared test is generated by the tested cable under the partial discharge (1.73Uo) voltage.
Tests show that the crosslinked polyethylene material has the temperature of 200 +/-3 ℃, the load time of 15 minutes and the mechanical stress of 20N/cm2The maximum elongation of the crosslinked polyethylene material under load in the elongation test of (1) is not more than 130%. The insulation tg delta test (sample heated to a temperature of conductor 1 that exceeds the maximum temperature of conductor 1 during normal operation of the cable by 5 ℃ to 10 ℃) is no more than 5 times 10 minus 4 times.
The conductor 1 of the embodiment adopts a multi-layer compact structure, and the outer diameter of the conductor 1 is reduced on the premise of ensuring that the cross section is large enough; the wall thickness of the insulating layer 3 is uniform, and the eccentricity is not more than 5%; the metal shielding layer 5 has excellent electrical performance and small partial discharge, and the electrical performance is guaranteed for a long time.
The basic reaction principle of the crosslinked polyethylene material during the operation of the cable is as follows: 1. the cross-linking agent is heated and decomposed to generate active free radicals; 2. the active free radical reacts with the polyethylene molecular chain to activate the polyethylene molecular chain; 3. the reactive polyethylene molecular chains react with each other to crosslink to form crosslinked polyethylene.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (13)

1. The utility model provides a compound RFID temperature measurement intelligence power cable, its characterized in that, includes cable core, a plurality of RFID temperature measurement electronic tags (10) and sheath structure, the sheath structure includes oversheath layer (11), oversheath layer (11) cover is located the periphery of cable core, a plurality of RFID temperature measurement electronic tags (10) all set up in the cable core with between oversheath layer (11), a plurality of RFID temperature measurement electronic tags (10) are followed the axial interval of cable is arranged.
2. The composite RFID thermometric intelligent power cable according to claim 1, wherein the cable core comprises a filler material (6) and a plurality of wire cores, the plurality of wire cores are twisted with each other, and the filler material (6) is filled between the wire cores and the sheath structure.
3. The composite RFID temperature measurement intelligent power cable according to claim 2, wherein the wire core comprises a conductor (1) and a conductor shielding layer (2), and the conductor shielding layer (2) is sleeved on the periphery of the conductor (1).
4. The composite RFID thermometric intelligent power cable according to claim 3, wherein the conductor (1) is a copper conductor made by stranding a plurality of bare copper monofilaments; or, the conductor (1) is an aluminum conductor; the aluminum conductor is formed by stranding a plurality of bare aluminum monofilaments.
5. The composite RFID RFID thermometric smart power cable of claim 4, wherein each bare copper monofilament has a diameter ranging from 2.21mm to 3.50mm, and the copper conductor has a diameter ranging from 6.0mm to 34.1 mm;
each bare aluminum monofilament has a diameter ranging from 2.16mm to 4.30mm, and the aluminum conductor has a diameter ranging from 6.0mm to 34.0 mm.
6. The composite RFID thermometric smart power cable according to claim 5, wherein when the conductor (1) is the aluminum conductor, if the cross-section of the aluminum conductor is 70mm2When the pitch diameter ratio of the cable core is 22-28, if the cross section of the aluminum conductor is more than 70mm2The pitch-diameter ratio of the cable core is 25 to 35;
when the conductor (1) is the copper conductor, the pitch-diameter ratio of the cable core is 25-35.
7. The composite RFID radio frequency identification temperature measurement intelligent power cable according to claim 3, wherein the wire core further comprises an insulating layer (3) and an insulating shielding layer (4), the insulating layer (3) is sleeved on the periphery of the conductor shielding layer (2), and the insulating shielding layer (4) is sleeved on the periphery of the insulating layer (3).
8. The composite RFID temperature measurement intelligent power cable according to claim 7, wherein the wire core further comprises a metal shielding layer (5), and the metal shielding layer (5) is sleeved on the periphery of the insulation shielding layer (4).
9. The composite RFID radio frequency identification temperature measurement intelligent power cable according to claim 2, wherein a wrapping layer (7) is further sleeved on the periphery of the cable core, and the wrapping layer (7) is used for wrapping and limiting the wire core and the filling material (6).
10. The composite RFID temperature measurement intelligent power cable according to claim 9, wherein the sheath structure further comprises an inner sheath layer (8), the inner sheath layer (8) is sleeved on the outer periphery of the wrapping layer (7), the outer sheath layer (11) is sleeved on the outer periphery of the inner sheath layer (8), and the RFID temperature measurement electronic tag (10) is arranged between the inner sheath layer (8) and the outer sheath layer (11).
11. The composite RFID temperature measurement smart power cable of claim 10, wherein the sheath structure further includes an armor layer (9), the armor layer (9) being sleeved between an outer wall of the inner sheath layer (8) and an inner wall of the outer sheath layer (11).
12. A cable manufacturing method for manufacturing the composite RFID thermometric smart power cable according to any one of claims 1 to 11, the cable manufacturing method comprising the steps of:
manufacturing a wire core;
the wire core and the filling material (6) are jointly stranded to obtain a cable core;
an armor layer (9) is wrapped on the periphery of the cable core;
attaching an RFID (radio frequency identification) temperature measurement electronic tag (10) to the surface of the armor layer (9);
an outer sheath layer (11) is wrapped on the periphery of the armor layer (9) attached with the RFID radio frequency identification temperature measurement electronic tag (10).
13. The cable manufacturing method according to claim 12, characterized in that said steps of: attaching an RFID (radio frequency identification) temperature measurement electronic tag (10) to the surface of the armor layer (9), specifically:
the RFID radio frequency identification temperature measurement electronic tags (10) are arranged on release paper in sequence, and the RFID radio frequency identification temperature measurement electronic tags (10) on the release paper are obtained by adopting a pneumatic drag chain device;
the pneumatic drag chain is connected with a production line in series and started, and the RFID radio frequency identification temperature measurement electronic tags (10) are sequentially attached to the surface of the armor layer (9) according to a production sequence.
CN202111389252.4A 2020-11-27 2021-11-22 Composite RFID (radio frequency identification) temperature measurement intelligent power cable and cable manufacturing method Pending CN113921201A (en)

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FR3128814A1 (en) * 2021-10-28 2023-05-05 Nexans POWER CABLE EQUIPPED WITH A PLURALITY OF ELECTRONIC RADIO FREQUENCY IDENTIFICATION DEVICES AND ASSOCIATED MANUFACTURING METHOD
CN115472343B (en) * 2022-09-27 2023-07-07 广州岭南电缆股份有限公司 High-voltage smart cable and production process thereof

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