CN110867277A - Environment-friendly tensile wear-resistant overhead insulated cable and four-core structure overhead insulated cable - Google Patents
Environment-friendly tensile wear-resistant overhead insulated cable and four-core structure overhead insulated cable Download PDFInfo
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- CN110867277A CN110867277A CN201911190377.7A CN201911190377A CN110867277A CN 110867277 A CN110867277 A CN 110867277A CN 201911190377 A CN201911190377 A CN 201911190377A CN 110867277 A CN110867277 A CN 110867277A
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- H01—ELECTRIC ELEMENTS
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- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1865—Sheaths comprising braided non-metallic layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0045—Cable-harnesses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
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- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/182—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments
- H01B7/183—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of an outer sheath
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
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- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention relates to the technical field of power transmission low-voltage distribution cables, in particular to an environment-friendly tensile wear-resistant overhead insulated cable and a four-core structure overhead insulated cable, which comprise a plurality of single-core cables; the single-core cable comprises an aluminum alloy conductor, and a water-blocking yarn-bundling layer, a water-blocking belting layer, a tensile wire layer, a heat-insulating layer and an insulating layer which are sequentially overlapped and extruded on the aluminum alloy conductor from inside to outside, wherein water-blocking yarns are filled in a gap between the water-blocking yarn-bundling layer and the aluminum alloy conductor; and a connecting rib is arranged between the adjacent single-core cables. The invention has the characteristics of high tensile strength, wear resistance, reinforced waterproof property, long service life, environmental protection and the like, can effectively avoid the situations of power failure of the cable and the like, and improves the safety and stability of the overhead cable for the power transmission low-voltage distribution circuit in the use process.
Description
Technical Field
The invention relates to the technical field of power transmission low-voltage distribution cables, in particular to an environment-friendly tensile wear-resistant overhead insulated cable and a four-core structure overhead insulated cable.
Background
In recent years, with the national advocated vigorous development of the rural economy of cities and towns, the urban construction and the new rural power transformation are continuously improved, and the overhead parallel cluster conductor for the original low-voltage distribution line often appears: 1) the line body is broken due to rough construction, and the insulation is damaged and is not wear-resistant; 2) because the products are used in sunlight, rain, snow and cold environments for a long time, insulation peeling, cracking and wetting are easily caused, the safety coefficient is low, the phenomena of electric leakage and short service life occur, and the personal safety is endangered.
Disclosure of Invention
Therefore, the invention provides an environment-friendly tensile wear-resistant overhead insulated cable and a four-core structure overhead insulated cable, which have the characteristics of high tensile strength, wear resistance, reinforced water resistance, long service life, environment friendliness and the like, can effectively avoid the situations of power failure of the cable and the like, and improves the safety and stability of the overhead cable for the power transmission low-voltage distribution circuit in the use process.
According to the design scheme provided by the invention, the environment-friendly tensile wear-resistant overhead insulated cable comprises a plurality of single-core cables; the single-core cable comprises an aluminum alloy conductor, and a water-blocking yarn-bundling layer, a water-blocking belting layer, a tensile wire layer, a heat-insulating layer and an insulating layer which are sequentially overlapped and extruded on the aluminum alloy conductor from inside to outside, wherein water-blocking yarns are filled in a gap between the water-blocking yarn-bundling layer and the aluminum alloy conductor; and a connecting rib is arranged between the adjacent single-core cables.
As the environment-friendly tensile wear-resistant overhead insulated cable, the water-blocking belting layer is made of 90% woven polypropylene fiber.
As the environment-friendly tensile wear-resistant overhead insulated cable, the heat-insulating layer is made of a ceramic heat-insulating material.
As the environment-friendly tensile wear-resistant overhead insulated cable, the insulating layer is further made of an environment-friendly low-voltage halogen-free irradiation crosslinking material.
As the environment-friendly tensile wear-resistant overhead insulated cable, the connecting ribs are further made of an environment-friendly low-voltage halogen-free irradiation crosslinking material.
Further, the invention also provides a four-core structure aerial insulated cable which comprises four single-core cables of the environment-friendly tensile wear-resistant aerial insulated cable.
As the four-core overhead insulated cable, four single-core cables are arranged in a star structure.
As the four-core structure aerial insulated cable, a tensile structure for enhancing the tensile property of the whole cable is further arranged on the connecting rib between at least one adjacent single-core cable.
As the four-core structure aerial insulated cable, further, the tensile structure comprises a steel wire reinforced layer and a tensile insulating layer extruded on the steel wire reinforced layer.
As the four-core overhead insulated cable, the tensile insulating layer is further made of an environment-friendly low-voltage halogen-free irradiation cross-linked material.
The invention has the beneficial effects that:
the invention has simple structure, scientific and reasonable design and compact product structure, and the conductor is made of aluminum alloy material, thus improving the integral breaking force of the conductor; the gaps of the conductors are filled with water-blocking yarns, so that the conductivity and the insulating property of the product are improved, and the service life is greatly prolonged; the conductor is externally wrapped by the water-blocking binding yarn and the water-blocking tape, so that the water-blocking effect of the product is improved, the gap between the conductor and the water-blocking tape is greatly reduced, the environment-friendly performance is excellent, the production cost is low, the process is simple and convenient, and the quality is more ensured; the water-blocking belt is provided with the tensile layer, so that the tensile strength is extremely high, and the overall breaking force and the performance of the conductor material of the product are structurally improved; the heat insulation layer is arranged between the tensile layer and the insulating layer, so that redundant heat can be collected, the heat can be stably released when the heat insulation layer is operated at proper time, the loss is effectively reduced, and a balance effect can be achieved; the whole product structure is formed by connecting ribs, and has good mechanical property; can effectively avoid cable power failure, promote the safety and stability nature in the overhead cable use for power transmission low pressure distribution lines.
Description of the drawings:
FIG. 1 is a schematic structural view of an overhead insulated cable according to an embodiment;
fig. 2 is a second schematic view of the overhead insulated cable structure in the embodiment.
The specific implementation mode is as follows:
in the figure, reference numeral 1 represents an aluminum alloy conductor, reference numeral 2 represents water-blocking yarn, reference numeral 3 represents a water-blocking yarn-binding layer, reference numeral 4 represents a water-blocking belting layer, reference numeral 5 represents a tensile wire layer, reference numeral 6 represents a heat-insulating layer, reference numeral 7 represents an insulating layer, reference numeral 8 represents a reinforcing steel wire, reference numeral 9 represents a tensile insulating layer, and reference numeral 10 represents a connecting rib.
The present invention will be described in further detail below with reference to the accompanying drawings and technical solutions, and embodiments of the present invention will be described in detail by way of preferred examples, but the embodiments of the present invention are not limited thereto.
The embodiment of the invention, as shown in fig. 1, provides an environment-friendly tensile wear-resistant overhead insulated cable, which comprises a plurality of single-core cables; the single-core cable comprises an aluminum alloy conductor, and a water-blocking yarn-bundling layer, a water-blocking belting layer, a tensile wire layer, a heat-insulating layer and an insulating layer which are sequentially overlapped and extruded on the aluminum alloy conductor from inside to outside, wherein water-blocking yarns are filled in a gap between the water-blocking yarn-bundling layer and the aluminum alloy conductor; and a connecting rib is arranged between the adjacent single-core cables.
The conductor is made of an aluminum alloy material, so that the integral breaking force of the conductor is improved; the gaps of the conductors are filled with water-blocking yarns, so that the conductivity and the insulating property of the product are improved, and the service life is greatly prolonged; the conductor is externally wrapped by the water-blocking binding yarn and the water-blocking tape, so that the water-blocking effect of the product is improved, the gap between the conductor and the water-blocking tape is greatly reduced, the environment-friendly performance is excellent, the production cost is low, the process is simple and convenient, and the quality is more ensured; the water-blocking belt is provided with the tensile layer, so that the tensile strength is extremely high, and the overall breaking force and the performance of the conductor material of the product are structurally improved; the heat insulation layer is arranged between the tensile layer and the insulating layer, so that redundant heat can be collected, the heat can be stably released when the heat insulation layer is operated at proper time, the loss is effectively reduced, and a balance effect can be achieved; the whole product structure is formed by connecting ribs, and has good mechanical property; can effectively avoid cable power failure, promote the safety and stability nature in the overhead cable use for power transmission low pressure distribution lines.
As the environment-friendly tensile wear-resistant overhead insulated cable in the embodiment of the invention, further, the water-blocking belting layer can be made of 90% woven polypropylene fiber, is light in weight, extremely high in tensile strength and better in chemical corrosion resistance, and structurally improves the overall tensile strength and the performance of conductor materials of the product. As shown in fig. 1, the conductor is externally wrapped by three water-blocking binding yarns and a layer of water-blocking tape, 1) the water-blocking tape expands when meeting water, so that the water-blocking effect of the product is improved; 2) by adopting the water-blocking binding yarn, after a temperature impact resistance test, the expansion rate of the material can reach 70.9ml/g, the water seepage length of a 72-hour water seepage test reaches 350cm, the gap between the conductor and the water-blocking tape is greatly reduced, the environment-friendly performance is excellent, the production cost is low, the process is simple and convenient, the quality is more ensured, and the water-blocking effect is comprehensively further improved.
As the environment-friendly tensile wear-resistant overhead insulated cable in the embodiment of the invention, further, the heat-insulating layer can be made of ceramic heat-insulating materials. Because of this kind of product uses in the middle of open-air or air for a long time, meet sleet weather easily, snow accumulation line body surface appears or by the phenomenon of freezing, cause product insulation resistance to reduce easily, it is insulating ageing, the life of product shortens and endangers the phenomenon of personal safety, in order to solve this kind of drawback, this novel product is through crowded package one deck ceramic insulation material between tensile layer and insulating layer, this kind of material can collect unnecessary heat, the steady release of in good time operation heat, the gradient changes for a short time, effectively reduce the loss volume, can play the balancing action.
As the environment-friendly tensile wear-resistant overhead insulated cable in the embodiment of the invention, the insulating layer can be further made of an environment-friendly low-voltage halogen-free irradiation crosslinking material. The insulating material can be a low-smoke halogen-free irradiation crosslinking weather-resistant environment-friendly material with the high temperature resistance of 200 ℃, the material has good superiority in the aspects of heat resistance, high temperature resistance, wear resistance, weather resistance, sunlight resistance, aging resistance, mechanical property and the like by controlling the proportion of the components, the practical problem of the cable under the use in the special occasion environment is solved from the root, and the service life of the product is prolonged.
As the environment-friendly tensile wear-resistant overhead insulated cable provided by the embodiment of the invention, furthermore, the connecting ribs can be made of environment-friendly low-voltage halogen-free irradiation crosslinking materials, so that the defect of insufficient integral breaking force caused by rough construction of cable products is effectively overcome, convenience is brought to construction, and the laying cost is saved.
Further, referring to fig. 2, an overhead insulated cable with a four-core structure is further provided in an embodiment of the present invention, and includes four single-core cables of the above environment-friendly tensile wear-resistant overhead insulated cable.
As the four-core overhead insulated cable in the embodiment of the invention, furthermore, four single-core cables are arranged in a star-shaped structure, as shown in fig. 2, three peripheral cables are triangular, and the remaining one cable is arranged in the center of the triangle, so that the overall tensile property is improved.
As the four-core structure aerial insulated cable in the embodiment of the invention, furthermore, a tensile structure for enhancing the tensile property of the whole cable is arranged on the connecting rib between at least one adjacent single-core cable. As shown in FIG. 2, a tensile structure is arranged between the three adjacent cores at the periphery so as to meet the tensile performance requirement of the use environment.
As the four-core structure aerial insulated cable in the embodiment of the invention, further, the tensile structure comprises a steel wire reinforced layer and a tensile insulating layer extruded on the steel wire reinforced layer.
As the four-core overhead insulated cable in the embodiment of the invention, the tensile insulating layer is further made of an environment-friendly low-voltage halogen-free irradiation crosslinking material.
Compared with the conventional overhead insulated cable, the overhead insulated cable structure provided by the embodiment of the invention has the following characteristics: a. the product is provided with a three-layer tensile structure, and a first layer of conductor can be made of 6000 series aluminum alloy materials with higher strength; the second layer adopts polypropylene fiber with weaving density of 90% as a tensile layer; the third layer adopts a structure of adding soft steel wires, and the tensile property of the product is integrally improved from a single-layer structure to the integral structure of the product; b. the traditional aerial cable only has a wrapped water-blocking tape in the water-blocking aspect, and is poor in water-blocking effect, the product of the invention adopts three water-blocking materials to improve the water-blocking effect, the gaps of the conductors are filled with water-blocking yarns, and the conductors are externally formed by the water-blocking yarns and the wrapped water-blocking tape; c. due to the particularity of the application occasions of the overhead cable, the structure and the material of the product are both selected, the service life of the product is started, performance improvement is carried out from three aspects, and on one hand, the conductor gaps are filled with water-blocking yarns, so that the conductivity and the insulating property of the product are improved; in the second aspect, the insulation resistance of the product is easily reduced and the service life of the cable is reduced in consideration of the weather that the product is easy to encounter rain and snow in the operation process, and the release of operation heat is balanced by wrapping a layer of ceramic heat-insulating material between the tensile layer and the insulation layer; the third aspect is the selection of insulating materials, the problem that the cable insulation is damaged when the product is used in the field for a long time or exposed in the air is solved, and the practical problems that the service life of the cable is short and the operation cost is increased are completely solved through the comprehensive improvement of the third aspect. The properties of high tensile strength, wear resistance, reinforced water resistance, long service life, environmental protection and the like of the environment-friendly high tensile strength wear-resistant long-life overhead insulated cable can be further improved, and the long-term use in field occasions can be met.
It is to be understood that the foregoing description of specific exemplary embodiments of the invention has been presented for the purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various changes and modifications may be made to the specific embodiments described above and various combinations of the technical features and structures proposed by the present invention may be made without departing from the concept of the present invention, and the scope of the present invention is defined by the appended claims.
Claims (10)
1. An environment-friendly tensile wear-resistant overhead insulated cable is characterized by comprising a plurality of single-core cables; the single-core cable comprises an aluminum alloy conductor, and a water-blocking yarn-bundling layer, a water-blocking belting layer, a tensile wire layer, a heat-insulating layer and an insulating layer which are sequentially overlapped and extruded on the aluminum alloy conductor from inside to outside, wherein water-blocking yarns are filled in a gap between the water-blocking yarn-bundling layer and the aluminum alloy conductor; and a connecting rib is arranged between the adjacent single-core cables.
2. The environment-friendly, tensile and wear-resistant overhead insulated cable according to claim 1, wherein the water-blocking belting layer is made of polypropylene fibers with a weaving density of 90%.
3. The environment-friendly tensile wear-resistant overhead insulated cable according to claim 1, wherein the heat-insulating layer is made of a ceramic heat-insulating material.
4. The environment-friendly tensile wear-resistant overhead insulated cable according to claim 1, wherein the insulating layer is made of an environment-friendly low-voltage halogen-free irradiation crosslinking material.
5. The environment-friendly tensile wear-resistant overhead insulated cable according to claim 1, wherein the connecting ribs are made of environment-friendly low-voltage halogen-free irradiation crosslinking material.
6. An overhead insulated cable with a four-core structure, which is characterized by comprising four single-core cables of the environment-friendly tensile wear-resistant overhead insulated cable according to any one of claims 1 to 5.
7. The overhead insulated cable of the four-core structure according to claim 6, wherein four single-core cables are laid in a star configuration.
8. The overhead insulated cable of claim 6, wherein the tie bar between at least one adjacent single-core cables is provided with a tensile structure for enhancing the tensile strength of the whole cable.
9. The overhead insulated cable of claim 8, wherein the tensile structure comprises a reinforcing steel wire and a tensile insulation layer extruded on the reinforcing steel wire.
10. The overhead insulated cable with the four-core structure according to claim 9, wherein the tensile insulating layer is made of an environment-friendly low-voltage halogen-free irradiation crosslinking material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911190377.7A CN110867277A (en) | 2019-11-28 | 2019-11-28 | Environment-friendly tensile wear-resistant overhead insulated cable and four-core structure overhead insulated cable |
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| CN201911190377.7A CN110867277A (en) | 2019-11-28 | 2019-11-28 | Environment-friendly tensile wear-resistant overhead insulated cable and four-core structure overhead insulated cable |
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| CN110867277A true CN110867277A (en) | 2020-03-06 |
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| CN204596451U (en) * | 2015-03-17 | 2015-08-26 | 天津塑力线缆集团有限公司 | A kind of aerial insulated cable of parallel set beamforming |
| CN107633910A (en) * | 2017-08-30 | 2018-01-26 | 苏州惠华电子科技有限公司 | A kind of abrasion-proof and refractory cable |
| CN107833661A (en) * | 2017-11-14 | 2018-03-23 | 江苏凯达电缆有限公司 | A kind of double sheath flexible water power cables of ceramic insulation double shield |
| CN108550421A (en) * | 2018-06-25 | 2018-09-18 | 江苏东峰电缆有限公司 | A kind of crosslinked polyetylene insulated pvc sheath radial water-resisting power cable |
| CN109273140A (en) * | 2018-09-07 | 2019-01-25 | 河南讯达电缆有限公司 | The mountain area 1kV weatherability water blocking overhead insulated cable |
| CN211087961U (en) * | 2019-11-28 | 2020-07-24 | 人民电缆集团有限公司 | Environment-friendly tensile wear-resistant overhead insulated cable and four-core structure overhead insulated cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204596451U (en) * | 2015-03-17 | 2015-08-26 | 天津塑力线缆集团有限公司 | A kind of aerial insulated cable of parallel set beamforming |
| CN107633910A (en) * | 2017-08-30 | 2018-01-26 | 苏州惠华电子科技有限公司 | A kind of abrasion-proof and refractory cable |
| CN107833661A (en) * | 2017-11-14 | 2018-03-23 | 江苏凯达电缆有限公司 | A kind of double sheath flexible water power cables of ceramic insulation double shield |
| CN108550421A (en) * | 2018-06-25 | 2018-09-18 | 江苏东峰电缆有限公司 | A kind of crosslinked polyetylene insulated pvc sheath radial water-resisting power cable |
| CN109273140A (en) * | 2018-09-07 | 2019-01-25 | 河南讯达电缆有限公司 | The mountain area 1kV weatherability water blocking overhead insulated cable |
| CN211087961U (en) * | 2019-11-28 | 2020-07-24 | 人民电缆集团有限公司 | Environment-friendly tensile wear-resistant overhead insulated cable and four-core structure overhead insulated cable |
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