CN219575223U - Crosslinked polyethylene insulation corrosion-resistant waterproof medium-voltage power cable - Google Patents
Crosslinked polyethylene insulation corrosion-resistant waterproof medium-voltage power cable Download PDFInfo
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- CN219575223U CN219575223U CN202320653574.3U CN202320653574U CN219575223U CN 219575223 U CN219575223 U CN 219575223U CN 202320653574 U CN202320653574 U CN 202320653574U CN 219575223 U CN219575223 U CN 219575223U
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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 utility model provides a crosslinked polyethylene insulation corrosion-resistant waterproof medium-voltage power cable, which comprises a conductor, wherein a semi-conductive water-blocking tape is overlapped outside the conductor, and a 10kV crosslinked conductor shielding layer, a crosslinked polyethylene insulation layer and a 10kV crosslinked insulation shielding layer are sequentially and jointly extruded outside the semi-conductive water-blocking tape to form a wire core; the cable core is externally overlapped with a wrapping copper strip shielding layer, a wrapping buffer type water-blocking wrapping layer is arranged outside the copper strip shielding layer, a waterproof corrosion-resistant reinforcing layer is arranged outside the buffer type water-blocking wrapping layer, a steel tape armor layer is arranged outside the waterproof corrosion-resistant reinforcing layer, and a chlorosulfonated polyethylene outer sheath is extruded outside the steel tape armor layer. The utility model has excellent flexibility, oil resistance, water permeability resistance, corrosion resistance, water resistance, friction resistance and mechanical damage resistance, has long service life and can meet the market demand.
Description
Technical Field
The utility model relates to the field of wires and cables, in particular to a crosslinked polyethylene insulation corrosion-resistant waterproof medium-voltage power cable.
Background
The construction of the power distribution system is realized by applying a large number of medium-voltage power cables, the cable has good insulation performance, the power supply reliability can be improved, the urban capacity is beautified, and the popularization and application value is higher; however, the common cable has common ageing resistance, poor corrosion resistance and short service life; in addition, in the cable construction process, water vapor easily permeates into the cable due to weather and other reasons, water tree aging phenomenon can occur under the action of an electric field, and cable insulation is damaged, so that potential hidden danger affecting the safe operation of the cable is formed; with the continuous expansion of industry fields, the cable is widely applied in different environments, the waterproof performance of the power cable is more and more important, and the power cable used in a humid region in the south, a cross-river cross-sea region, a sea island region and the like must pass through water or be completely soaked in water, so that the cable needs to have excellent waterproof performance.
Disclosure of Invention
The utility model provides a crosslinked polyethylene insulation corrosion-resistant waterproof medium-voltage power cable with good corrosion resistance, waterproof performance and mechanical performance, which aims to solve the problems in the prior art.
The utility model relates to a crosslinked polyethylene insulation corrosion-resistant waterproof medium-voltage power cable, which comprises a conductor, wherein a semi-conductive water-blocking tape is overlapped and wrapped outside the conductor, and a 10kV crosslinked conductor shielding layer, a crosslinked polyethylene insulation layer and a 10kV crosslinked insulation shielding layer are sequentially and jointly extruded outside the semi-conductive water-blocking tape in three layers to form a wire core; the cable core is externally overlapped with a wrapping copper strip shielding layer, a wrapping buffer type water-blocking wrapping layer is arranged outside the copper strip shielding layer, a waterproof corrosion-resistant reinforcing layer is arranged outside the buffer type water-blocking wrapping layer, a steel tape armor layer is arranged outside the waterproof corrosion-resistant reinforcing layer, and a chlorosulfonated polyethylene outer sheath is extruded outside the steel tape armor layer.
Preferably, the conductor is formed by twisting graphene coated soft copper wire bundles.
Preferably, the buffer type water-blocking wrapping layer comprises a first base layer, a water-absorbing layer and a second base layer, wherein the first base layer, the water-absorbing layer and the second base layer are formed by compounding semiconductive adhesives in sequence.
Preferably, the first base layer and the second base layer are both made of semi-conductive polyester fiber non-manufacturing cloth.
Preferably, the water-absorbing layer is a high-speed swelling water-absorbing resin.
Preferably, the waterproof and corrosion-resistant reinforcing layer comprises a butyronitrile polyvinyl chloride waterproof layer, a high-modulus polyethylene fiber tape wrapped outside the butyronitrile polyvinyl chloride waterproof layer and a polyamide corrosion-resistant layer extruded outside the high-modulus polyethylene fiber tape.
Preferably, the butyronitrile polyvinyl chloride waterproof layer is wrapped on the buffer type waterproof wrapping layer.
Preferably, the steel tape armor layer is formed by wrapping galvanized steel tape gaps.
Compared with the prior art, the utility model has the beneficial effects that:
1. the graphene coated copper wire with better conductivity and mechanical strength than the common coated copper wire is adopted, so that the conductor section can be reduced without increasing the wire section too much under the condition of transmitting the same conductive capacity load.
2. The buffer type water-blocking wrapping layer is formed by compounding semiconductive polyester fiber non-manufacturing cloth, high-speed expansion water-absorbing resin and semiconductive polyester fiber non-manufacturing cloth through semiconductive adhesive, so that the cable has strong hygroscopicity, large expansion rate and high mechanical strength; the cable insulation and metal layer can be effectively buffered, and the insulation is prevented from being damaged; the heat resistance is good, the instant high temperature resistance is realized, and the performance can be kept stable when the cable is in instant short circuit.
3. Through the waterproof corrosion-resistant enhancement layer that sets up, improved the performance of cable from the three aspects:
3.1, the corrosion resistance of the cable is improved:
the outer corrosion-resistant layer is extruded by polyamide materials, has good comprehensive properties including mechanical property, heat resistance, abrasion resistance, chemical resistance, environmental corrosion resistance and self-lubricating property, and has low friction coefficient and certain flame retardance; the middle adopts the high-modulus polyethylene fiber tape, has the advantages of high strength, low density, good insulativity and the like, has stable chemical property, has good chemical resistance and corrosion resistance, and greatly increases the corrosion resistance of the cable by combining the polyamide resin corrosion-resistant layer;
3.2, the waterproof performance of the cable is improved:
the inner layer adopts a butyronitrile polyvinyl chloride waterproof layer, has good flexibility, oil resistance and water permeability, can prevent external moisture from penetrating into the cable, and greatly increases the waterproof performance of the cable; the chlorosulfonated polyethylene outer sheath is adopted as the cable outer sheath, so that the cable has good water vapor diffusivity, excellent flexibility and extensibility, root system permeability resistance, weather resistance and ultraviolet resistance; the semiconductive water-blocking tape wrapped outside the conductor and the copper tape shielding layer further prevents the corrosion of external moisture to the internal structure of the cable, and the integral waterproof performance and the safety performance of the cable are greatly improved through the improvement and combination of the internal waterproof structure and the external waterproof structure, so that the service life of the cable is prolonged;
3.3 improving the mechanical properties of the cable:
the high-modulus polyethylene fiber band has high specific strength, high specific modulus, more than ten times of specific strength of steel wires with the same section, low elongation at break and large work at break, and has strong energy absorbing capacity, so that the high-modulus polyethylene fiber band has outstanding impact resistance, cutting resistance, compression resistance and bending resistance;
4. the chlorosulfonated polyethylene outer sheath has excellent friction resistance and mechanical damage resistance, can avoid damaging other protective layers in the laying process of the cable, further improves the wear resistance of the cable body, and greatly increases the strength and the service life of the cable by being matched with the high-modulus polyethylene fiber belt.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of a buffer type water-blocking wrap-around layer decomposition structure;
fig. 3 is a schematic structural view of a buffer type water-blocking wrapping layer.
Description of the embodiments
The utility model is further described below with reference to the drawings and the detailed description.
As shown in fig. 1, the cross-linked polyethylene insulated corrosion-resistant waterproof medium-voltage power cable comprises a conductor 1, and is formed by twisting graphene coated copper wire bundles which are better in conductivity and mechanical strength than common coated copper wires, wherein the cross section of the conductor can be reduced under the condition of transmitting the same conductive capacity load, and the cross section of an electric wire cannot be increased too much.
The conductor is overlapped and wrapped with a semi-conductive water-blocking tape 2, and the semi-conductive water-blocking tape is sequentially extruded with a 10kV cross-linked conductor shielding layer 3, a cross-linked polyethylene insulating layer 4 and a 10kV cross-linked insulating shielding layer 5 in three layers to form a wire core; overlapping and wrapping a copper strip shielding layer 6 outside the wire core, and wrapping by adopting a galvanized steel strip gap; the copper strip shielding layer is wrapped with the buffer type water-blocking wrapping layer 7, the buffer type water-blocking wrapping layer is wrapped with the waterproof corrosion-resistant reinforcing layer 8, the waterproof corrosion-resistant reinforcing layer is provided with the steel strip armor layer 9, the chlorosulfonated polyethylene outer jacket 10 is extruded outside the steel strip armor layer, the cable has excellent friction resistance and mechanical damage resistance, other protective layers can be prevented from being damaged in the laying process of the cable, the wear resistance of the cable body is improved, and the strength and the service life of the cable are greatly improved by matching with the high-modulus polyethylene fiber tape.
The waterproof and corrosion-resistant reinforcing layer 8 comprises a butyronitrile polyvinyl chloride waterproof layer 81, a high-modulus polyethylene fiber tape 82 wrapped outside the butyronitrile polyvinyl chloride waterproof layer and a polyamide corrosion-resistant layer 83 extruded outside the high-modulus polyethylene fiber tape;
the performance of the cable is improved from three aspects by the improved waterproof and corrosion-resistant reinforcing layer:
1. the corrosion resistance of the cable is improved:
the outer corrosion-resistant layer is extruded by polyamide materials, has good comprehensive properties including mechanical property, heat resistance, abrasion resistance, chemical resistance, environmental corrosion resistance and self-lubricating property, and has low friction coefficient and certain flame retardance; the middle adopts the high-modulus polyethylene fiber tape, has the advantages of high strength, low density, good insulativity and the like, has stable chemical property, good chemical resistance and corrosion resistance, and greatly increases the overall corrosion resistance of the cable by combining the polyamide resin corrosion-resistant layer;
2. the waterproof performance of the cable is improved:
the inner layer adopts a butyronitrile polyvinyl chloride waterproof layer, has good flexibility, oil resistance and water permeability, can prevent external moisture from penetrating into the cable, and greatly increases the waterproof performance of the cable; the chlorosulfonated polyethylene outer sheath is adopted as the cable outer sheath, so that the cable has good water vapor diffusivity, excellent flexibility and extensibility, root system permeability resistance, weather resistance and ultraviolet resistance; the semiconductive water-blocking tape wrapped outside the conductor and the copper tape shielding layer further prevents the corrosion of external moisture to the internal structure of the cable, and the integral waterproof performance and the safety performance of the cable are greatly improved through the improvement and combination of the internal waterproof structure and the external waterproof structure, so that the service life of the cable is prolonged;
3. the mechanical performance of the cable is improved:
the high-modulus polyethylene fiber band has high specific strength, high specific modulus, the specific strength is more than ten times of that of the steel wire with the same section, the specific modulus is only inferior to that of special carbon fiber, the breaking elongation is low, the breaking work is large, and the energy absorbing capacity is very strong, so that the high-modulus polyethylene fiber band has outstanding impact resistance and cutting resistance, and the mechanical property of the cable is greatly improved;
as shown in fig. 2-3, the buffer type water-blocking wrapping layer 7 comprises a first base layer 71, a water-absorbing layer 72 and a second base layer 73, wherein the first base layer and the second base layer are made of non-manufacturing cloth of semiconductive polyester fibers, and the water-absorbing layer is high-speed expansion water-absorbing resin; the first base layer, the water absorption layer and the second base layer are compounded by semiconductive adhesive in sequence;
the cable has the advantages that the cable is high in hygroscopicity, high in expansion rate and high in mechanical strength, and the semi-conductive polyester fiber non-manufacturing cloth, the high-speed expansion water-absorbing resin and the semi-conductive polyester fiber non-manufacturing cloth are compounded through the semi-conductive adhesive; the cable insulation and metal layer can be effectively buffered, and the insulation is prevented from being damaged; the heat resistance is good, the instant high temperature resistance is realized, and the performance can be kept stable when the cable is in instant short circuit.
To sum up: the improvement ensures that the cable has excellent flexibility, oil resistance, water penetration resistance, corrosion resistance, water resistance, friction resistance and mechanical damage resistance, has long service life and can meet the market demands.
The present utility model has been described in terms of the preferred embodiments thereof, and it should be understood by those skilled in the art that various modifications can be made without departing from the principles of the utility model, and such modifications should also be considered as being within the scope of the utility model.
Claims (8)
1. The utility model provides a corrosion-resistant waterproof formula middling pressure power cable of crosslinked polyethylene insulation which characterized in that: the cable comprises a conductor, wherein a lapped semi-conductive water-blocking tape is overlapped outside the conductor, and a 10kV crosslinked conductor shielding layer, a crosslinked polyethylene insulating layer and a 10kV crosslinked insulating shielding layer are sequentially extruded outside the semi-conductive water-blocking tape in three layers to form a cable core; the cable core is externally overlapped with a wrapping copper strip shielding layer, a wrapping buffer type water-blocking wrapping layer is arranged outside the copper strip shielding layer, a waterproof corrosion-resistant reinforcing layer is arranged outside the buffer type water-blocking wrapping layer, a steel tape armor layer is arranged outside the waterproof corrosion-resistant reinforcing layer, and a chlorosulfonated polyethylene outer sheath is extruded outside the steel tape armor layer.
2. The crosslinked polyethylene insulated corrosion-resistant and waterproof medium voltage power cable according to claim 1, wherein: the conductor is formed by twisting graphene coated soft copper wire bundles.
3. The crosslinked polyethylene insulated corrosion-resistant and waterproof medium voltage power cable according to claim 1, wherein: the buffer type water-blocking wrapping layer comprises a first base layer, a water-absorbing layer and a second base layer, wherein the first base layer, the water-absorbing layer and the second base layer are formed by compounding semiconductive adhesives in sequence.
4. A crosslinked polyethylene insulated corrosion-resistant water-proof medium voltage power cable according to claim 3, characterized in that: the first base layer and the second base layer are made of semi-conductive polyester fiber non-manufacturing cloth.
5. A crosslinked polyethylene insulated corrosion-resistant water-proof medium voltage power cable according to claim 3, characterized in that: the water-absorbing layer is high-speed expansion water-absorbing resin.
6. The crosslinked polyethylene insulated corrosion-resistant and waterproof medium voltage power cable according to claim 1, wherein: the waterproof and corrosion-resistant reinforcing layer comprises a butyronitrile polyvinyl chloride waterproof layer, a high-modulus polyethylene fiber tape wrapped outside the butyronitrile polyvinyl chloride waterproof layer and a polyamide corrosion-resistant layer extruded outside the high-modulus polyethylene fiber tape.
7. The crosslinked polyethylene insulated corrosion-resistant, water-proof medium voltage power cable according to claim 6, wherein: the butyronitrile polyvinyl chloride waterproof layer is wrapped on the buffer type waterproof wrapping layer.
8. The crosslinked polyethylene insulated corrosion-resistant and waterproof medium voltage power cable according to claim 1, wherein: the steel tape armor layer is formed by wrapping galvanized steel tape gaps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320653574.3U CN219575223U (en) | 2023-03-29 | 2023-03-29 | Crosslinked polyethylene insulation corrosion-resistant waterproof medium-voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320653574.3U CN219575223U (en) | 2023-03-29 | 2023-03-29 | Crosslinked polyethylene insulation corrosion-resistant waterproof medium-voltage power cable |
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| Publication Number | Publication Date |
|---|---|
| CN219575223U true CN219575223U (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320653574.3U Active CN219575223U (en) | 2023-03-29 | 2023-03-29 | Crosslinked polyethylene insulation corrosion-resistant waterproof medium-voltage power cable |
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| Country | Link |
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| CN (1) | CN219575223U (en) |
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- 2023-03-29 CN CN202320653574.3U patent/CN219575223U/en active Active
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