CN213070653U - Medium-high voltage cable for smart power grid - Google Patents
Medium-high voltage cable for smart power grid Download PDFInfo
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- CN213070653U CN213070653U CN202021588124.3U CN202021588124U CN213070653U CN 213070653 U CN213070653 U CN 213070653U CN 202021588124 U CN202021588124 U CN 202021588124U CN 213070653 U CN213070653 U CN 213070653U
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Abstract
The utility model discloses a smart power grids is with well high tension cable relates to power cable technical field, include the cable core and set gradually in its inside three sinle silks along cable core circumferencial direction, the sinle silk includes from interior to exterior set gradually sticiss circular copper conductor, insulating layer and compound shielding layer, and the cable core includes light-duty non-woven fabrics, inner liner, armor and the outer jacket that from interior to exterior set gradually. In the structure of compound shielding layer, the operation that annealing soft copper strips can effective ground protection sinle silk normal for a long time, graphite alkene coating semi-conductive area has fabulous effect of discharging still under the supplementary condition of shielding heat energy, can play the secondary protection to the sinle silk, in the fixed distance outside the graphite alkene coating semi-conductive area, miniature collector is equipped with, after the cable breaks down, high frequency electromagnetic wave can be sent in the twinkling of an eye to two miniature collectors of trouble section head and the tail, can fix a position the fault point fast accurately through the partial discharge equipment, thereby in time overhaul, the inner liner, the whole that armor and outer jacket make up has fabulous physical mechanical properties, outdoor, under adverse circumstances such as open-air direct-burried soil and gravel, the cable is whole to be difficult to by fish tail and cut, can realize faster laying work and later maintenance work.
Description
Technical Field
The utility model relates to a power cable technical field especially relates to a smart power grids is with well high tension cable.
Background
With the increasing demand and expectation of earth resources, new energy, green resource utilization, energy reasonable utilization and the like are widely concerned by the nation, the issue of the smart grid is also brought forward, and the technical support of wires and cables is necessary in each link of power generation, power transformation, power transmission, power utilization and configuration of the power grid; the medium-high voltage cable generally refers to a power cable mainly used for power transformation and transmission with the alternating voltage of more than 6kV and less than 35kV, the implementation and application of the intelligent power grid in China do not depart from the medium-high voltage cable technology, the medium-high voltage cable used by the domestic power grid at present is slightly influenced by weather and external environment, the medium-high voltage cable is beneficial to personal safety after being laid and normally used, and the operation and maintenance work in the later period are simple and convenient; is beneficial to city planning. However, once the domestic power grid construction cable has operation problems, the outage time and the overhaul period are long, the regional power utilization is affected, and certain economic loss and power utilization inconvenience are caused.
Disclosure of Invention
The utility model aims to solve the technical problem that present internal electric wire netting construction cable is in case the operational problem appears, and the outage time is longer with the maintenance time limit for a project, influences the regional power consumption to can cause certain economic loss and power consumption inconvenient.
In order to solve the technical problem, the utility model provides a medium-high voltage cable for a smart grid, which comprises a cable core and three wire cores arranged inside the cable core in sequence along the circumferential direction of the cable core, wherein the two adjacent wire cores are mutually contradicted, and polypropylene is filled between the wire cores and the cable core; the cable core comprises a compressed round copper conductor, an insulating layer and a composite shielding layer which are sequentially arranged from inside to outside, a plurality of micro collectors are arranged at equal intervals along the length direction of the composite shielding layer, when the cable breaks down, the micro collectors closest to the head and the tail of the fault section send high-frequency electromagnetic waves, and collector binding belts for fixing the micro collectors are bound outside the composite shielding layer; the cable core includes light-duty non-woven fabrics, inner liner, armor and the outer jacket that sets gradually from inside to outside.
The technical effects are as follows: in the structure of compound shielding layer, the operation that annealing soft copper strips can effective ground protection sinle silk normal for a long time, graphite alkene coating semi-conductive area has fabulous effect of discharging still under the supplementary condition of shielding heat energy, can play the secondary protection to the sinle silk, in the fixed distance outside the graphite alkene coating semi-conductive area, miniature collector is equipped with, after the cable breaks down, high frequency electromagnetic wave can be sent in the twinkling of an eye to two miniature collectors of trouble section head and the tail, can fix a position the fault point fast accurately through the partial discharge equipment, thereby in time overhaul, the inner liner, the whole that armor and outer jacket make up has fabulous physical mechanical properties, outdoor, under adverse circumstances such as open-air direct-burried soil and gravel, the cable is whole to be difficult to by fish tail and cut, can realize faster laying work and later maintenance work.
The utility model discloses the technical scheme who further injects is:
furthermore, the insulating layer comprises a semiconductive inner shielding layer, a crosslinked polyethylene layer and a semiconductive outer shielding layer which are sequentially arranged from inside to outside.
The middle-high voltage cable for the smart power grid is characterized in that the semi-conductive inner shielding layer and the semi-conductive outer shielding layer are both made of EVA and conductive carbon black in a mixed mode.
In the aforementioned medium-high voltage cable for the smart power grid, the composite shielding layer comprises the annealed soft copper strip and the graphene coating semi-conducting strip which are sequentially arranged from inside to outside.
The middle-high voltage cable for the smart grid and the micro collector comprise
The temperature detection device detects the temperature of the cable in real time and sends a high-temperature signal when the temperature exceeds a preset temperature threshold;
the current detection device detects the current in real time and sends out a large-current signal when the current exceeds a preset current threshold;
and the Bluetooth switch is turned on in response to the high-temperature signal or the large-current signal.
The utility model provides a medium and high voltage cable for smart power grids, inner liner and outer jacket all set up to be made by PVC, the armor sets up to the two-layer galvanized steel band of radial setting.
In the above medium and high voltage cable for smart grid, the resistivity of the annealed soft copper strip is set to be not more than 0.0178 Ω (mm)2And/m, the thickness of the graphene-coated semi-conductive belt is set to be 0.08-0.20 mm.
The utility model provides a medium and high voltage cable for smart power grids, miniature collector's thickness sets up to 1mm, and length and width all set up to 5 mm.
The utility model has the advantages that:
(1) in the utility model, because the net-shaped three-dimensional structure of the crosslinked polyethylene enables the whole insulating layer to have very excellent heat resistance, and because a new chemical bond is established between macromolecules, the hardness, the rigidity, the wear resistance and the impact resistance of the whole insulating layer are all improved, the crosslinked polyethylene keeps the original good insulating property of the polyethylene, the insulating resistance is further increased, and the influence by temperature is less, and because the insulating layer is formed by a three-layer co-extrusion mode, the insulating layer has the advantages of compactness and high roundness;
(2) in the utility model, the setting of the inner liner makes the thickness of the whole wire core more uniform, and simultaneously makes the outer surface of the wire core more round, and the armor layer is set as two layers of galvanized steel strips, and the wrapping mode is set as clearance wrapping, so that the whole cable can be free from the influence of external force as much as possible when laying, thereby ensuring normal electrification, and the setting of the outer protective layer further enhances the environment-friendly flame retardant property of the whole cable, and simultaneously has certain insect and rat prevention performance;
(3) the utility model discloses in, the setting of miniature collector size for self has small and light in weight's advantage, makes it when guaranteeing stable collection function, also can be better depend on outside compound shielding layer, thereby keeps the fixed of self better, and can not influence the normal use of whole cable.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of the center core of the present invention.
Wherein: 100. a cable core; 110. light non-woven fabric; 120. an inner liner layer; 130. an armor layer; 140. an outer jacket; 200. a wire core; 210. pressing the round copper conductor; 220. an insulating layer; 221. a semiconductive inner shield layer; 222. a crosslinked polyethylene layer; 223. a semiconductive outer shield layer; 230. a composite shielding layer; 231. annealing the soft copper strip; 232. a graphene-coated semiconducting tape; 240. a micro collector; 250. the collector is wrapped with a band; 300. and (4) filling polypropylene.
Detailed Description
The middle-high voltage cable for the smart power grid provided by the embodiment has the structure as shown in fig. 1 to fig. 2, and comprises a cable core 100, wherein three wire cores 200 are sequentially arranged in the cable core 100 along the circumferential direction of the cable core, the two adjacent wire cores 200 are mutually abutted, and polypropylene filler 300 is filled between the wire cores 200 and the cable core 100.
The wire core 200 comprises a compressed round copper conductor arranged from inside to outside in sequenceThe composite shielding layer comprises a body 210, an insulating layer 220 and a composite shielding layer 230, wherein the insulating layer 220 comprises a semiconductive inner shielding layer 221, a crosslinked polyethylene layer 222 and a semiconductive outer shielding layer 223 which are sequentially arranged from inside to outside, wherein the semiconductive inner shielding layer 221 and the semiconductive outer shielding layer 223 are both prepared by mixing EVA and conductive carbon black; the composite shielding layer comprises an annealed soft copper strip 231 and a graphene coating semi-conductive strip 232 which are arranged from inside to outside in sequence, and the resistivity of the annealed soft copper strip 231 is set to be 0.0178 omega (mm)2The thickness of the graphene-coated semiconductive tape 232 was set to 0.14 mm.
The composite shielding layer 230 is externally provided with a plurality of miniature collectors 240, all the miniature collectors 240 are arranged at equal intervals along the length direction of the composite shielding layer 230, when a cable breaks down, the miniature collectors 240 closest to the broken section from head to tail emit high-frequency electromagnetic waves, the composite shielding layer 230 is externally wrapped with collector wrapping tapes 250 for fixing all the miniature collectors 240, the thickness of each miniature collector is set to be 1mm, and the length and the width of each miniature collector are set to be 5 mm.
The miniature collector comprises a temperature detection device, a current detection device and a Bluetooth switch. The temperature detection device is preset with a temperature threshold value, detects the temperature of the cable in real time and sends out a high-temperature signal when the temperature exceeds the temperature threshold value; the current detection device is preset with a current threshold value, detects the current in real time and sends out a large-current signal when the current exceeds the current threshold value; the Bluetooth switch responds to a high-temperature signal or a large-current signal to turn on the Bluetooth switch and sends out a Bluetooth signal all the time, and the matched partial discharge equipment can receive the Bluetooth signal and give a prompt.
The cable core 100 comprises a light non-woven fabric 110, an inner liner 120, an armor layer 130 and an outer protective layer 140 which are sequentially arranged from inside to outside, wherein the inner liner 120 and the outer protective layer 140 are both made of PVC, and the armor layer 130 is arranged into two layers of galvanized steel strips which are radially arranged.
Because the reticular three-dimensional structure of the crosslinked polyethylene enables the whole insulating layer 220 to have excellent heat resistance, and a new chemical bond is established between macromolecules, the hardness, the rigidity, the wear resistance and the shock resistance of the whole insulating layer 220 are improved, the crosslinked polyethylene maintains the original good insulating property of the polyethylene, the insulating resistance is further increased, the influence of temperature is small, and the insulating layer 220 is formed by a three-layer co-extrusion mode, so the insulating layer has the advantages of compactness and high roundness.
The setting of inner liner 120 makes the holistic thickness of sinle silk 200 more even, also makes the surface of self more round simultaneously, and armor 130 sets up to two-layer galvanized steel band, and sets up to the clearance around the package mode and wrap, makes whole cable can not receive external force influence as far as when laying the operation, thereby has guaranteed normal circular telegram, the environmental protection flame retardant property of whole cable has then further been strengthened in the setting of outer jacket 140, also has certain protection against insects protection against rodents performance simultaneously.
In the structure of the composite shielding layer 230, the annealed soft copper strip 231 can effectively ground and protect the wire core 200 from long-term normal operation, the graphene coated semi-conductive strip 232 has excellent discharging effect under the condition of auxiliary shielding heat energy and can play a role in secondary protection of the wire core 200, the miniature collector 240 is arranged in a fixed distance outside the graphene coated semi-conductive strip 232, after a cable fails, abnormal high temperature and large current can be generated at the damaged part, the miniature collector 240 monitors the cable and the miniature collector in real time, the two miniature collectors 240 at the head and the tail of a fault section can instantly send out Bluetooth signals, the Bluetooth signals can be received through matched partial discharge equipment, so that the fault point can be quickly and accurately positioned and timely overhauled, the whole body formed by combining the inner liner 120, the armor layer 130 and the outer protective layer 140 has excellent physical and mechanical properties, and under the harsh environments of outdoor and field direct-buried soil, gravel and the like, the cable is not easy to scratch and cut, and quick laying work and later maintenance work can be realized.
In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.
Claims (8)
1. The utility model provides a well high voltage cable for smart power grids which characterized in that: the cable comprises a cable core (100) and three wire cores (200) which are sequentially arranged in the cable core (100) along the circumferential direction, two adjacent wire cores (200) are mutually butted, and polypropylene filling (300) is filled between each wire core (200) and the cable core (100); the cable core (200) comprises a compressed round copper conductor (210), an insulating layer (220) and a composite shielding layer (230) which are sequentially arranged from inside to outside, a plurality of micro collectors (240) are arranged outside the composite shielding layer (230) at equal intervals along the length direction of the composite shielding layer, when a cable breaks down, the micro collectors (240) closest to the head and the tail of the fault section emit high-frequency electromagnetic waves, and collector binding belts (250) used for fixing the micro collectors (240) are bound outside the composite shielding layer (230); the cable core (100) comprises a light non-woven fabric (110), an inner liner (120), an armor layer (130) and an outer protective layer (140) which are sequentially arranged from inside to outside.
2. The medium-high voltage cable for the smart grid according to claim 1, wherein: the insulating layer (220) comprises a semi-conductive inner shielding layer (221), a cross-linked polyethylene layer (222) and a semi-conductive outer shielding layer (223) which are sequentially arranged from inside to outside.
3. The medium-high voltage cable for the smart grid according to claim 2, wherein: the semi-conductive inner shielding layer (221) and the semi-conductive outer shielding layer (223) are both made of EVA and conductive carbon black in a mixing mode.
4. The medium-high voltage cable for the smart grid according to claim 1, wherein: the composite shielding layer (230) comprises an annealed soft copper strip (231) and a graphene coating semi-conductive strip (232) which are sequentially arranged from inside to outside.
5. The medium-high voltage cable for the smart grid according to claim 1, wherein: the micro collector (240) comprises
The temperature detection device detects the temperature of the cable in real time and sends a high-temperature signal when the temperature exceeds a preset temperature threshold;
the current detection device detects the current in real time and sends out a large-current signal when the current exceeds a preset current threshold;
and the Bluetooth switch is turned on in response to the high-temperature signal or the large-current signal and sends out a Bluetooth signal.
6. The medium-high voltage cable for the smart grid according to claim 1, wherein: the inner liner (120) and the outer protective layer (140) are both made of PVC, and the armor layer (130) is arranged into two layers of galvanized steel strips which are arranged in the radial direction.
7. The medium-high voltage cable for the smart grid according to claim 4, wherein: the resistivity of the annealed soft copper strip (231) is set to be not more than 0.0178 Ω (mm)2/m, and the thickness of the graphene-coated semiconductive strip (232) is set to be 0.08-0.20 mm.
8. The medium-high voltage cable for the smart grid according to claim 5, wherein: the thickness of miniature collector (240) sets up to 1mm, and length and width all set up to 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021588124.3U CN213070653U (en) | 2020-08-03 | 2020-08-03 | Medium-high voltage cable for smart power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021588124.3U CN213070653U (en) | 2020-08-03 | 2020-08-03 | Medium-high voltage cable for smart power grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213070653U true CN213070653U (en) | 2021-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021588124.3U Active CN213070653U (en) | 2020-08-03 | 2020-08-03 | Medium-high voltage cable for smart power grid |
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| Country | Link |
|---|---|
| CN (1) | CN213070653U (en) |
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- 2020-08-03 CN CN202021588124.3U patent/CN213070653U/en active Active
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