An electromagnetic identification intelligent temperature measurement cable

Abstract

The utility model discloses an electromagnetic identification intelligent temperature measurement cable, comprising a cable core, wherein the gap of the cable core is filled and rounded with a flame-retardant high-temperature filling rope; a high flame-retardant glass fiber tape binding layer is wrapped on the outside of the cable core, and a polyethylene inner lining layer is extruded outside the high flame-retardant glass fiber tape binding layer; a steel belt armor layer is wrapped on the outer surface of the polyethylene inner lining layer; a flame-retardant polyethylene isolation layer with longitudinal grooves is extruded outside the steel belt armor layer, and multiple electronic tags are continuously attached in the longitudinal grooves along the cable at a certain interval; a flame-retardant polyethylene or flame-retardant polyvinyl chloride inner sheath is extruded outside the flame-retardant polyethylene isolation layer, and an environmentally friendly rat-ant-proof nylon outer sheath is extruded outside the flame-retardant polyethylene or flame-retardant polyvinyl chloride inner sheath. The dynamic temperature of the cable operation can be monitored in real time, and the heating is timely warned, which is helpful for management and maintenance personnel to quickly identify and locate the cable, reduce the labor intensity of daily inspection and maintenance, and improve the service life of the cable and the intelligent level of photovoltaic line operation and maintenance management.

Description

Technical Field

[0001] The utility model relates to the technical field of overhead cables, in particular to an electromagnetic identification intelligent temperature measurement cable. Background Art

[0002] In recent years, under the guidance of the "dual carbon" strategy, it has become a social consensus to vigorously develop new energy such as photovoltaics and wind power to achieve green, low-carbon and sustainable development. my country's renewable green energy has achieved breakthrough development and entered a new stage of large-scale, high-quality development, among which solar photovoltaic power generation has grown rapidly.

[0003] In a solar photovoltaic power generation system, the photovoltaic power generated by the large-scale dispersed layout of solar panels is concentratedly transmitted to the inverter through numerous 1.8kV DC cables and converted into AC power. The current output by all inverters in the photovoltaic power station is then collected together through 1.8 / 3kV AC collector cables, transmitted to the transformer for step-up to 35kV, and finally transmitted to the grid through 26 / 35kV AC collector cables.

[0004] Since photovoltaic power stations are mostly built in vast inland deserts, Gobi deserts, saline-alkali lands, mountainous hills, and plain lakes, photovoltaic power generation facilities such as solar panels are scattered in layout, covering an area of ​​tens of square kilometers. The line length of 1.8 / 3kV and 26 / 35kV AC collector cables can reach hundreds of kilometers, and cable lines of different voltage levels and specifications are intricate and scattered. It is very difficult to carry out daily monitoring and management, line inspection and identification, and fault detection and maintenance after cable installation and operation. A large amount of manpower is required for daily line inspection. The labor intensity and cost of line maintenance management are high, which is not conducive to the intelligent and digital centralized management of photovoltaic power station electrical lines.

[0005] The existing photovoltaic systems use 1.8 / 3kV and 26 / 35kV AC collector cables, which have the following problems:

[0006] (1) The conventional 1.8 / 3kV and 26 / 35kV AC collector cables installed in photovoltaic power station lines are numerous, long, scattered, crisscrossed, and directly buried in the soil. Once mechanical damage or electrical faults occur locally on the lines, it is very difficult for management and maintenance personnel to accurately identify the direction and model specifications of the underground cable lines and accurately locate and troubleshoot the fault points. A lot of manpower and material resources will be invested in digging cable trenches, searching cable paths, and troubleshooting and locating fault points.

[0007] (2) The 1.8 / 3kV and 26 / 35kV AC collector cables used in the photovoltaic system of the prior art do not have the function of self-sensing and temperature measurement. When the power is turned on normally, they cannot sense and monitor the dynamic operating temperature of the cable line in real time. Once the cable is partially damaged, leaked, electrically overloaded, or short-circuited, causing heat, they cannot be detected and warned in time, and protective measures such as reducing the load and cutting off the power cannot be taken, which shortens the long-term operating life of the cable.

[0008] (3) Most photovoltaic power stations are located in areas with many rats and ants. Their supporting 1.8 / 3kV and 26 / 35kV AC collector cables are easily damaged by rats and termites. The collector cables in the existing technology do not have rat and ant resistance because the outer sheath of the cable is made of conventional flame-retardant polyethylene or polyvinyl chloride materials. Even if a flame-retardant polyethylene or polyvinyl chloride material containing chemical rat and ant resistance is used, the chemical rat and ant resistance will gradually evaporate and decay after long-term operation, and its function will decline. There are certain safety hazards to the normal operation of photovoltaic line systems in areas with many rats and ants. Utility Model Content

[0009] In order to overcome the deficiencies in the prior art, the utility model provides an electromagnetic identification intelligent temperature measurement cable, which can realize close-range, wireless and rapid identification and reading of electronic information such as cable model specifications, length, line number, etc., and can monitor the dynamic temperature of cable operation in real time and give timely warning of fever, which is helpful for management and maintenance personnel to quickly identify and locate cables, reduce the labor intensity of daily inspections and repairs, and improve the service life of cables, as well as the intelligent level of photovoltaic line operation and maintenance management.

[0010] To achieve the above-mentioned purpose, the utility model provides an electromagnetic identification intelligent temperature measurement photovoltaic collector cable, comprising a cable core and an intelligent temperature sensing and measuring optical fiber unit arranged in the cable core; a flame-retardant high-temperature filling rope is filled in the gap of the cable core; a highly flame-retardant glass fiber tape binding layer is overlapped and wrapped outside the cable core, and a polyethylene inner lining layer with waterproof and moisture-proof function is extruded outside the highly flame-retardant glass fiber tape binding layer; two layers of galvanized steel tape are wrapped in the gap on the outer surface of the polyethylene inner lining layer to form a steel tape armor layer of the cable; a flame-retardant polyethylene isolation layer with longitudinal grooves is extruded outside the steel tape armor layer, and a plurality of electronic tags are continuously attached in the longitudinal grooves along the longitudinal intervals of the cable; a flame-retardant polyethylene or flame-retardant polyvinyl chloride inner sheath is extruded outside the flame-retardant polyethylene isolation layer, and an environmentally friendly rat-proof and ant-proof nylon outer sheath is extruded outside the flame-retardant polyethylene or flame-retardant polyvinyl chloride inner sheath.

[0011] Furthermore, the cable core includes a saddle-shaped bracket made of high thermal conductivity polyphenylene ether plastic and arranged in the center of the cable core. An intelligent temperature sensing and measuring optical fiber unit is provided in the center of the saddle-shaped bracket, and a first insulating core is fitted along each arc edge of the saddle-shaped bracket.

[0012] Furthermore, the first insulating wire core is composed of a conductor and a silane cross-linked polyethylene insulation layer extruded outside the conductor.

[0013] Furthermore, the cable core is formed by twisting a plurality of wire cores; the wire core is composed of a second insulating wire core and a metal shielding layer wrapped around the insulating wire core.

[0014] Furthermore, the metal shielding layer is formed by wrapping copper tape or winding copper wire.

[0015] Furthermore, the second insulated core includes a conductor, and an intelligent temperature sensing and measuring optical fiber unit is provided at the center of the conductor; the outside of the conductor is extruded in sequence by a three-layer co-extrusion method to form a semi-conductive inner shielding layer, a cross-linked polyethylene insulation layer and a semi-conductive outer shielding layer.

[0016] Furthermore, the conductor is a copper, aluminum or aluminum alloy conductor with a circular compressed and twisted structure.

[0017] Furthermore, the electronic tag is a SAW-RFID passive radio frequency identification electronic tag.

[0018] Furthermore, the thickness of the environmentally friendly rat- and ant-proof nylon outer sheath is 0.5-1.0 mm.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The present application proposes an electromagnetic identification intelligent temperature measurement cable, in which a SAW-RFID passive radio frequency identification electronic tag with wireless electromagnetic identification and an intelligent temperature sensing and temperature measurement optical fiber unit are installed inside the cable. The cable can realize close-range, wireless, and rapid identification and reading of the cable model, specification, length, line number and other electronic information, and can monitor the dynamic temperature of the cable in real time and give timely warnings of fever, which helps management and maintenance personnel to quickly identify and locate cables, reduce the labor intensity of daily inspections and maintenance, and improve the service life of cables, as well as the level of intelligence in photovoltaic line operation and maintenance management.

[0021] In addition, the sheath of the cable adopts a double-layer structure design, so that in addition to excellent mechanical and electrical properties, the cable also has excellent properties such as resistance to rat and ant gnawing, acid and alkali corrosion, smooth surface, wear resistance, waterproof and moisture-proof, etc., which can meet the working requirements of the solar photovoltaic power station collection line in the field environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0023] Figure 2 It is a structural schematic diagram of embodiment 2 of the present utility model. DETAILED DESCRIPTION

[0024] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application. Example

[0025] like Figure 1 As shown, the utility model provides an electromagnetic identification intelligent temperature measurement cable, which can be used in the 1.8 / 3kV collector line of a photovoltaic power station; it includes a cable core, the cable core includes a saddle-shaped bracket 4 made of high thermal conductivity polyphenylene ether plastic arranged in the center of the cable core, and an intelligent temperature sensing and temperature measurement optical fiber unit 5 is arranged in the central hole of the saddle-shaped bracket, which can sense the operating temperature of the cable core in real time and transmit the optical signal to the terminal optical signal receiver system of the cable, so as to effectively monitor the operating temperature of the cable and timely warn of the cable heating;

[0026] A first insulating core is arranged along each arc edge of the saddle-shaped bracket. The saddle-shaped bracket not only protects the intelligent temperature sensing and temperature measuring optical fiber unit, but also supports and protects the insulating core, thereby improving the tensile and compressive resistance of the entire cable core. The gaps in the cable core are filled with a flame-retardant high-temperature filling rope 3 to make it round, which can also play a flame-retardant role.

[0027] It should be noted here that: the first insulated core is composed of a conductor 1 and a silane cross-linked polyethylene insulation layer 2 extruded outside the conductor, has high temperature tolerance, and can maintain its good physical and chemical properties under high temperature environment; it has good electrical insulation performance, and the cross-linked structure of silane cross-linked polyethylene can enhance its mechanical strength, improve its wear resistance and impact resistance, and has corrosion resistance, can remain stable in acidic and alkaline environments, and has the advantages of being green and environmentally friendly; wherein, the conductor 1 adopts a copper (aluminum, aluminum alloy) conductor with a circular compressed twisted structure.

[0028] A highly flame-retardant glass fiber tape binding layer 6 is wrapped around the cable core in an overlapping manner, which has the advantages of good insulation performance and high temperature resistance, prolongs the service life of the cable, reduces the volume and reduces the weight; a polyethylene lining layer 7 with waterproof and moisture-proof function is extruded outside the highly flame-retardant glass fiber tape binding layer 6; two layers of galvanized steel tape are wrapped around the gap on the outer surface of the polyethylene lining layer 7 to form a steel tape armor layer 8 of the cable, which plays a role in mechanical protection and physical protection against rats and ants; a flame-retardant polyethylene isolation layer 9 with longitudinal grooves is extruded outside the steel tape armor layer, and multiple electronic tags 10 are continuously attached at a certain interval along the longitudinal direction of the cable in the longitudinal grooves, and a SAW-RFID passive radio frequency identification electronic tag with wireless electromagnetic identification is used. The line management and maintenance personnel use a handheld radio frequency reader to scan the underground directly buried cable line at a close distance to obtain a reflected signal, thereby realizing rapid identification and reading of the cable model specification, length, line number and other electronic information, which helps to improve the work efficiency and intelligent level of line maintenance management;

[0029] Finally, a flame retardant polyethylene or flame retardant polyvinyl chloride inner sheath 11 is extruded outside the flame retardant polyethylene isolation layer, and an environmentally friendly rat- and ant-proof nylon outer sheath 12 with a thickness of 0.5-1.0 mm is extruded outside the flame retardant polyethylene or flame retardant polyvinyl chloride inner sheath. The sheath of the cable adopts a double-layer structure design, so that in addition to excellent mechanical and electrical properties, the cable also has excellent properties such as anti-rat and ant gnawing, acid and alkali corrosion resistance, smooth surface, wear resistance, waterproof and moisture-proof, and can meet the working requirements of the solar photovoltaic power station collection line in the field environment. Example

[0030] like Figure 2 As shown, the utility model provides an electromagnetic identification intelligent temperature measurement cable, which can be used in 26 / 35kV collector lines of photovoltaic power stations; it includes a conductor 1, which adopts a copper (aluminum, aluminum alloy) conductor with a circular compressed and twisted structure; the conductor 1 is extruded in a three-layer co-extrusion manner in sequence on the outside of the conductor 1, a semi-conductive inner shielding layer 13, a cross-linked polyethylene insulation layer 14 and a semi-conductive outer shielding layer 15, forming a second insulating core, which has a long-term operating temperature resistance of 90°C and good electrical insulation performance.

[0031] An intelligent temperature sensing and measuring optical fiber unit 5 is provided at the center of the conductor 1, which can sense the temperature of the cable core in real time and transmit the optical signal to the terminal optical signal receiver system of the cable, so as to effectively monitor the operating temperature of the cable and provide timely warning of cable heating.

[0032] The second insulating core is also wrapped with a metal shielding layer 16 to form a core; the metal shielding layer is formed by wrapping a copper tape or winding a copper wire to play a short-circuit current discharge role;

[0033] Multiple wire cores are twisted into a cable core, and the gaps in the cable core are filled with flame-retardant high-temperature filling ropes 3 to make them round and flame-retardant.

[0034] A highly flame-retardant glass fiber tape binding layer 6 is wrapped around the cable core in an overlapping manner, which has the advantages of good insulation performance and high temperature resistance, prolongs the service life of the cable, reduces the volume and reduces the weight; a polyethylene lining layer 7 with waterproof and moisture-proof function is extruded outside the highly flame-retardant glass fiber tape binding layer 6; two layers of galvanized steel tape are wrapped around the gap on the outer surface of the polyethylene lining layer 7 to form a steel tape armor layer 8 of the cable, which plays a role in mechanical protection and physical protection against rats and ants; a flame-retardant polyethylene isolation layer 9 with longitudinal grooves is extruded outside the steel tape armor layer, and multiple electronic tags 10 are continuously attached in the longitudinal grooves at a spacing of 1 meter or other spacings along the longitudinal direction of the cable, and a SAW-RFID passive radio frequency identification electronic tag with wireless electromagnetic identification is used. Line management and maintenance personnel use a handheld radio frequency reader to scan the underground directly buried cable line at a close distance to obtain a reflected signal, thereby realizing rapid identification and reading of electronic information such as cable model specifications, length, line number, etc., which helps to improve the work efficiency and intelligent level of line maintenance management;

[0035] Finally, a flame retardant polyethylene or flame retardant polyvinyl chloride inner sheath 11 is extruded outside the flame retardant polyethylene isolation layer, and an environmentally friendly rat- and ant-proof nylon outer sheath 12 with a thickness of 0.5-1.0 mm is extruded outside the flame retardant polyethylene or flame retardant polyvinyl chloride inner sheath. The sheath of the cable adopts a double-layer structure design, so that in addition to excellent mechanical and electrical properties, the cable also has excellent properties such as anti-rat and ant gnawing, acid and alkali corrosion resistance, smooth surface, wear resistance, waterproof and moisture-proof, and can meet the working requirements of the solar photovoltaic power station collection line in the field environment.

[0036] To summarize, the present application proposes an electromagnetically identifiable intelligent temperature measuring cable, which is used in 1.8 / 3kV and 26 / 35kV AC collector lines of photovoltaic power stations. The cable has a SAW-RFID passive radio frequency identification electronic tag and an intelligent temperature sensing and measuring optical fiber unit that can be wirelessly identifiable. It can realize close-range, wireless, and rapid identification and reading of the cable's model specifications, length, line number and other electronic information, and can monitor the dynamic temperature of the cable in real time and give timely warnings of fever. It helps management and maintenance personnel to quickly identify and locate cables, reduce the labor intensity of daily inspections and maintenance, and improve the service life of cables, as well as the level of intelligence in photovoltaic line operation and maintenance management.

[0037] In addition, the sheath of the cable adopts a double-layer structure design. In addition to a conventional flame-retardant polyethylene or polyvinyl chloride inner sheath, an environmentally friendly rat- and ant-proof nylon outer sheath is added. In addition to excellent mechanical and electrical properties, the cable also has excellent properties such as anti-rat- and ant-gnawing, acid and alkali corrosion resistance, smooth surface, wear resistance, waterproof and moisture-proof, which can meet the working requirements of solar photovoltaic power station collection lines in outdoor environmental conditions.

[0038] The utility model has many specific application paths. The above is only the preferred implementation mode of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the utility model. These improvements should also be regarded as the protection scope of the utility model.

Claims

1. An electromagnetic identification intelligent temperature measurement cable, characterized in that: It includes a cable core and an intelligent temperature sensing and measuring optical fiber unit arranged in the cable core; a flame-retardant high-temperature filling rope is filled in the gap of the cable core; a highly flame-retardant glass fiber tape binding layer is overlapped and wrapped outside the cable core, and a polyethylene lining layer with waterproof and moisture-proof functions is extruded outside the highly flame-retardant glass fiber tape binding layer; two layers of galvanized steel tape are wrapped in the gap on the outer surface of the polyethylene inner lining layer to form a steel belt armor layer of the cable; a flame-retardant polyethylene isolation layer with longitudinal grooves is extruded outside the steel belt armor layer, and a plurality of electronic tags are continuously attached in the longitudinal grooves along the longitudinal intervals of the cable; a flame-retardant polyethylene or flame-retardant polyvinyl chloride inner sheath is extruded outside the flame-retardant polyethylene isolation layer, and an environmentally friendly rat- and ant-proof nylon outer sheath is extruded outside the flame-retardant polyethylene or flame-retardant polyvinyl chloride inner sheath.

2. The electromagnetic identification intelligent temperature measurement cable according to claim 1, characterized in that: The cable core comprises a saddle-shaped bracket made of high thermal conductivity polyphenylene ether plastic and arranged at the center of the cable core. An intelligent temperature sensing and measuring optical fiber unit is arranged at the center of the saddle-shaped bracket, and a first insulating core is arranged along each arc edge of the saddle-shaped bracket.

3. The electromagnetic identification intelligent temperature measurement cable according to claim 2, characterized in that: The first insulating wire core is composed of a conductor and a silane cross-linked polyethylene insulating layer extruded outside the conductor.

4. The electromagnetic identification intelligent temperature measurement cable according to claim 1, characterized in that: The cable core is formed by twisting a plurality of wire cores; the wire core is composed of a second insulating wire core and a metal shielding layer wrapped around the insulating wire core.

5. The electromagnetic identification intelligent temperature measurement cable according to claim 4, characterized in that: The metal shielding layer is formed by wrapping copper tape or winding copper wire.

6. The electromagnetic identification intelligent temperature measurement cable according to claim 4, characterized in that: The second insulating core includes a conductor, the center of which is provided with an intelligent temperature sensing and measuring optical fiber unit; the outside of the conductor is extruded in sequence with a semi-conductive inner shielding layer, a cross-linked polyethylene insulation layer and a semi-conductive outer shielding layer by a three-layer co-extrusion method.

7. An electromagnetic identification intelligent temperature measurement cable according to claim 3 or 6, characterized in that: The conductor is a copper, aluminum or aluminum alloy conductor with a circular tightly compressed stranded structure.

8. The electromagnetic identification intelligent temperature measurement cable according to claim 1, characterized in that: The electronic tag is a SAW-RFID passive radio frequency identification electronic tag.

9. The electromagnetic identification intelligent temperature measurement cable according to claim 1, characterized in that: The thickness of the environmentally friendly rat- and ant-proof nylon outer sheath is 0.5-1.0 mm.

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