CN117976309A - Built-in high-strength metal tube stranded conductor air-cooled cable and joint method thereof - Google Patents
Built-in high-strength metal tube stranded conductor air-cooled cable and joint method thereof Download PDFInfo
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- CN117976309A CN117976309A CN202410117594.8A CN202410117594A CN117976309A CN 117976309 A CN117976309 A CN 117976309A CN 202410117594 A CN202410117594 A CN 202410117594A CN 117976309 A CN117976309 A CN 117976309A
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- 239000004020 conductor Substances 0.000 title claims abstract description 69
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 23
- 239000002184 metal Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000010410 layer Substances 0.000 claims abstract description 70
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052802 copper Inorganic materials 0.000 claims abstract description 60
- 239000010949 copper Substances 0.000 claims abstract description 60
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 229920003020 cross-linked polyethylene Polymers 0.000 claims abstract description 18
- 239000004703 cross-linked polyethylene Substances 0.000 claims abstract description 18
- 239000011241 protective layer Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 3
- 239000004743 Polypropylene Substances 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 244000043261 Hevea brasiliensis Species 0.000 claims description 4
- 229920003052 natural elastomer Polymers 0.000 claims description 4
- 229920001194 natural rubber Polymers 0.000 claims description 4
- 229910001006 Constantan Inorganic materials 0.000 description 8
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 230000005684 electric field Effects 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 4
- 239000012943 hotmelt Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 229910000639 Spring steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
- H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/30—Insulated conductors or cables characterised by their form with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/022—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of longitudinal lapped tape-conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
Abstract
The invention provides a built-in high-strength metal tube stranded conductor air-cooled cable, which comprises: the outer sheath is sleeved with a water blocking tape wrapping protective layer, a plurality of bundles of stranded copper conductors are sleeved in the water blocking tape wrapping protective layer, a plurality of air cooling pipes are stranded in each bundle of stranded copper conductors, a semiconductive insulating layer is sleeved outside each bundle of stranded copper conductors, a high-voltage-resistant crosslinked polyethylene insulating layer is sleeved outside the semiconductive insulating layer, and a copper strip wrapping shielding layer is sleeved outside the high-voltage-resistant crosslinked polyethylene insulating layer; and a filler is arranged in a gap between the copper strip wrapping shielding layer and the water-blocking strip wrapping protective layer. The invention also provides a built-in high-strength metal tube stranded conductor air-cooled cable joint method, which comprises the following steps: step S001: inserting half of the spring pipe joints on each non-compact spring pipe in one section of the cable, and inserting the other half of each spring pipe joint into each corresponding non-compact spring pipe in the other section of the cable; step S002: and correspondingly welding each bundle of copper conductors in the two sections of cables together.
Description
Technical Field
The invention is suitable for the field of wiring engineering of electric wires and cables and strong electric power grids, and particularly relates to an air-cooled cable with built-in high-strength metal tubes and stranded conductors and a joint method thereof.
Background
The existing high-power cable can generate a large amount of heat due to alternating current resistance when current is conveyed. This heat accumulation inside the cable can lead to a sharp rise in the resistance of the cable conductors causing greater current loss, and also to rapid degradation of the cable insulation, severely affecting the cable life. With the development of smart grid projects, the service life of cables and even power grids is prolonged, and the improvement of the working current capacity of the cables becomes a research direction of electrical engineers. The self-cooling power grid is a way to solve the problem, some cables adopt oil cooling and water cooling structures, however, the installation of the oil cooling cable and the water cooling cable is complex, and the risk of the collapse is high.
Disclosure of Invention
In view of the above, it is an object of the present invention to provide an in-line high strength metallic tube stranded conductor air cooled cable and method of splicing the same that overcomes or at least partially solves or alleviates the above-identified problems.
The invention provides a built-in high-strength metal tube stranded conductor air-cooled cable, which comprises: the outer sheath is sleeved with a water blocking tape wrapping protective layer, a plurality of bundles of stranded copper conductors are sleeved in the water blocking tape wrapping protective layer, a plurality of air cooling pipes are stranded in each bundle of stranded copper conductors, a semiconductive insulating layer is sleeved outside each bundle of stranded copper conductors, a high-voltage-resistant crosslinked polyethylene insulating layer is sleeved outside the semiconductive insulating layer, and a copper strip wrapping shielding layer is sleeved outside the high-voltage-resistant crosslinked polyethylene insulating layer; and a filler is arranged in a gap between the copper strip wrapping shielding layer and the water-blocking strip wrapping protective layer.
The invention also has the following optional features.
Optionally, the air cooling pipe comprises an air cooling Kang Tongdai, and a non-compact spring pipe is sleeved in the air cooling Kang Tongdai.
Optionally, small holes are uniformly formed in the air-cooled constantan belt.
Optionally, an armor body is arranged between the outer sheath and the water-blocking tape wrapping protective layer.
Optionally, an easy-stripping semiconductive shielding layer is arranged between the high-voltage-resistant crosslinked polyethylene insulating layer and the copper strip wrapping shielding layer.
Optionally, a high-strength polypropylene tape wrapping protective layer is sleeved between the easy-stripping semiconductive shielding layer and the copper tape wrapping shielding layer.
Optionally, the filler is high water blocking vulcanized natural rubber.
The invention also provides a built-in high-strength metal tube stranded conductor air-cooled cable joint method, which is implemented by adopting the built-in high-strength metal tube stranded conductor air-cooled cable, and comprises the following steps: step S001: when two sections of cables are connected, half of the spring pipe joints are inserted into each non-compact spring pipe in one section of cable, and the other half of each spring pipe joint is inserted into each corresponding non-compact spring pipe in the other section of cable; step S002: and correspondingly welding each bundle of stranded copper conductors in the two sections of cables together.
The invention has the beneficial effects that:
The built-in high-strength metal tube stranded conductor air-cooled cable and the joint method thereof twist the conductor and the air-cooled tube to form the current conductor with an air-cooling function, and timely output high-temperature heat generated by current operation through air flow in the air-cooled tube, thereby achieving the purpose of cooling the conductor and reducing the conductor resistance. The air-cooled pipe adopts a structure that the air-cooled constantan belt is internally sleeved with the non-compact spring pipe, when the cable joints are connected, the two ends of the spring pipe joint can be inserted into the non-compact spring pipes in the two sections of cables to connect the air-cooled pipe, and then each bundle of stranded copper conductors is welded, so that the air-cooled pipe cannot be melted and blocked at the high temperature of the welded copper conductors. The built-in high-strength metal pipe stranded conductor air-cooled cable and the joint method thereof ensure that the working temperature of the cable is always kept at a lower level, can effectively delay the aging of the cable and prolong the service life of the cable, simultaneously reduce the power grid load generated by conductor resistance and reduce the electric energy loss, and can not block the air-cooled pipe when the cable joint is welded.
Drawings
FIG. 1 is a schematic cross-sectional view of an air-cooled cable with built-in high strength metal tube stranded conductors according to the present invention;
FIG. 2 is a schematic cross-sectional view of the air-cooled tube of FIG. 1;
FIG. 3 is a schematic illustration of the air cooling Kang Tongdai of FIG. 1;
Fig. 4 is a schematic view of the structure of the two-section cable inserted into the spring tube joint in the air-cooled tube when the two-section cable is connected.
In the above figures: 1. twisting the copper conductor; 2. a semiconductive insulating layer; 3. a high pressure resistant crosslinked polyethylene insulation layer; 4. an easily peelable semiconductive shield; 5. a high-strength polypropylene tape wrapping protective layer; 6. copper strip wrapping shielding layer; 7. a filler; 8. a water blocking tape wrapping protective layer; 9. an armor body; 10. an outer sheath; 11. an air-cooled tube; 1101. air cooling Kang Tongdai; 1102. a non-dense spring tube; 1103. a small hole; 1104. a spring pipe joint.
The invention will be described in further detail with reference to the accompanying drawings and examples;
Detailed Description
Referring to fig. 1 and 2, an embodiment of the present invention proposes a built-in high strength metal tube stranded conductor air-cooled cable, comprising: the outer sheath 10, the water-blocking tape wrapping protective layer 8 is sleeved in the outer sheath 10, a plurality of bundles of stranded copper conductors 1 are sleeved in the water-blocking tape wrapping protective layer 8, a plurality of air cooling pipes 11 are stranded in each bundle of stranded copper conductors 1, a semiconductive insulating layer 2 is sleeved outside each bundle of stranded copper conductors 1, a high-voltage-resistant crosslinked polyethylene insulating layer 3 is sleeved outside the semiconductive insulating layer 2, and a copper strip wrapping shielding layer 6 is sleeved outside the high-voltage-resistant crosslinked polyethylene insulating layer 3; and a filler 7 is arranged in a gap between the copper strip wrapping shielding layer 6 and the water-blocking strip wrapping protective layer 8.
As shown in fig. 1, the outer sheath 10 is made of an oil-resistant, slurry-resistant, acid-alkali-resistant vulcanized styrene-butadiene rubber (nitrile rubber) outer sheath material according to working occasions, so that the product can maintain the service life of more than ten years in environments with oil leakage, complex slurry composition and strong water corrosion.
The water blocking tape wrapping protective layer 8 can prevent water flow from invading the inside of the cable after absorbing water and expanding.
The stranded copper conductor 1 adopts a copper stranded conductor for the electric industry, so that good electric conductivity, electromagnetic signal transmission performance and convenient installation operation of the product are ensured.
The stranded copper conductor 1 and the air cooling pipe 11 are stranded to form a current conductor with an air cooling function, and high-temperature heat generated by current operation is timely output through air flow in the air cooling pipe 11, so that the purpose of cooling the stranded copper conductor 1 and reducing conductor resistance is achieved. Because the stranded copper conductor 1 keeps lower temperature all the time, so the working temperature of the cable keeps lower level all the time, the ageing of the cable can be effectively delayed, the service life of the cable can be prolonged, and meanwhile, the power grid load generated by the resistance of the stranded copper conductor 1 is reduced, and the electric energy loss is reduced. The minimum internal diameter of the air cooling pipe 11 is not less than 2mm, the maximum external diameter is not more than 8mm, the diameter of the stranded copper conductor 1 can be reduced as much as possible while the temperature of the stranded copper conductor 1 is guaranteed to be reduced in time, cable materials are reduced, and the manufacturing cost of the cable is reduced.
In order to realize electric field homogenization during the transmission of medium-high voltage current and avoid the concentrated formation of insulation breakdown of electromagnetic field, a semiconducting insulating layer 2 with semiconducting capacity is extruded on the outer layer of the stranded copper conductor 1. The semiconductive insulating layer 2 plays a role in changing the electromagnetic distribution of the surface of the stranded copper conductor 1, and the electromagnetic field generated on the outer surface of the semiconductive insulating layer corresponds to the electromagnetic characteristic of the cylindrical electric field more than the electromagnetic field of the surface of the stranded copper conductor 1.
The high-voltage-resistant crosslinked polyethylene insulating layer 3 is made of chemical crosslinked high-voltage-resistant polyolefin insulating material, and the thickness of the power wire core insulating layer meets the standard of GB/T12706 extrusion-coated insulated power cable with rated voltage of 1kV to 35kV and accessories. The high-voltage-resistant crosslinked polyethylene insulating layer 3 has good voltage resistance, high tensile strength and good high-temperature resistance.
The copper strip wrapping shielding layer 6 in the medium-high voltage cable can play a role in effectively reducing the release of electric energy to the outside, and plays a role in protecting peripheral electric appliances of the cable from electromagnetic damage. The copper strip wrapping shielding layer 6 can timely drain induction current generated by power frequency high-voltage alternating current and can shield electromagnetic fields inside and outside the single-phase wire core in an omnibearing manner.
Referring to fig. 2 and 4, according to one embodiment of the present invention, the air-cooled tube 11 includes an air-cooled constantan belt 1101, and an undensified spring tube 1102 is sleeved inside the air-cooled constantan belt 1101.
The air-cooled constantan belt 1101 is lapped and wrapped on the non-compact spring tube 1102 to form the air-cooled tube 11 with extremely high strength and stable structure. The non-dense spring tube 1102 is made of spring steel with a melting point temperature above 1400 ℃. The air-cooled tube 11 is not blocked by the melting of copper at the time of the cable joint.
Referring to fig. 2 and 3, according to an embodiment of the present invention, small holes 1103 are uniformly formed on the air-cooled copper strip 1101.
The diameter of the small holes 1103 on the air-cooled constantan copper belt 1101 is not smaller than 1mm at the minimum and not more than 10mm at the maximum, so that the mechanical strength of the air-cooled constantan copper belt 1101 is ensured while the sufficient ventilation quantity is ensured.
Referring to fig. 1, according to an embodiment of the present invention, an armor 9 is provided between an outer sheath 10 and a water-blocking tape wrapping protection layer 8.
The armor body 9 can effectually avoid the cable inside to receive external mechanical damage, and armor body 9 adopts the ferroaluminum alloy that has elasticity to make, has sufficient intensity and elasticity, provides the cavity of protection and cooling ventilation for the cable. A layer of hot melt film is arranged on the surface of the armor body 9 of the automatic window iron-aluminum alloy wind cavity. When the outer jacket is extruded over the outer surface of the armor 9, the hot melt film is softened by heat. The window shrapnel which is already opened on the armor body 9 breaks through the constraint of the layer of hot melt film to open the window. The window shrapnel breaks through the outer sheath to realize the exchange of inner air flow and outer air flow. The window elastic sheet can be still bound by a non-hot-melt film when the film passes through high temperature according to the requirement, and the outer sheath and the window elastic sheet can be opened manually by a cutter at a place suitable for window ventilation.
Referring to fig. 1, an easily peelable semiconductive shield layer 4 is provided between a high voltage resistant crosslinked polyethylene insulation layer 3 and a copper tape wrap shield layer 6 according to one embodiment of the invention.
The layer of easily-stripped semi-conductive shielding layer 4 is extruded outside the high-voltage-resistant crosslinked polyethylene insulating layer 3, and the layer of easily-stripped semi-conductive shielding layer 4 not only plays a role in preventing the high-voltage-resistant crosslinked polyethylene insulating layer 3 from being mechanically damaged, but also plays a role in homogenizing an electric field between the copper strip wrapping shielding layer 6 and the high-voltage-resistant crosslinked polyethylene insulating layer 3.
Referring to fig. 1, according to one embodiment of the present invention, a high strength polypropylene tape wrapping protective layer 5 is sleeved between an easy peel semiconductive shield layer 4 and a copper tape wrapping shield layer 6.
The high-strength polypropylene tape wrapping protective layer 5 is sleeved outside the easily-stripped semiconductive shielding layer 4, so that the easily-stripped semiconductive shielding layer 4 is prevented from being damaged by the copper tape wrapping shielding layer 6. Meanwhile, the induction current generated by the copper strip wrapping shielding layer 6 is isolated from impacting the electric field of the easily-stripped semiconductive shielding layer 4 and the high-voltage-resistant crosslinked polyethylene insulating layer 3, so that the insulating capability of the cable is improved.
Referring to fig. 1, according to one embodiment of the present invention, the filler 7 is high water blocking vulcanized natural rubber.
The filler 7 in the cable is filled by high water-blocking vulcanized natural rubber in a squeezing mode, so that the product has good water-blocking performance and tensile strength. The product is ensured to be normally used in a water-immersed state, and power supply interruption caused by water inflow of the cable can not occur.
The embodiment of the invention also provides a method for jointing the built-in high-strength metal tube stranded conductor air-cooled cable, which is implemented by adopting the built-in high-strength metal tube stranded conductor air-cooled cable according to any one of the embodiments, and comprises the following steps: step S001: in the case of two-section cable joints, half of the spring tube joints 1104 are inserted over each non-dense spring tube 1102 in one section of cable, and the other half of each spring tube joint 1104 is inserted into each corresponding non-dense spring tube 1102 in the other section of cable; step S002: each bundle of stranded copper conductors 1 in the two lengths of cable is soldered together in correspondence.
Referring to fig. 2 and 4, the spring tube connector 1104 connects two sections of cables using a high strength non-dense spring tube with an outer diameter close to the inner diameter of the non-dense spring tube 1102, one is to ensure that the two sections of cable conductors can be in close contact when connected, and the other is to ensure that the air cooling tube 11 is not blocked by high temperature when connected. The spring tube fitting 1104 and the non-dense spring tube 1102 are both made of high-strength thin strip spring steel, and the spring tube fitting 1104 with an outer diameter slightly smaller than that of the non-dense spring tube 1102 is inserted into the air cooling tube 11 of the two-section cable along the spring thread print as a bolt when being connected. When in medium-high voltage cable joint, each bundle of stranded copper conductors 1 is then fused together at high temperature by adopting a ceramic die. The stranded copper conductor 1 has a melting temperature up to 1083 ℃, and the non-dense spring tube 1102 is made of spring steel with a melting temperature higher than 1400 ℃. The cable joint is not melted by melting the stranded copper conductor 1, and the air-cooled tube 11 is not blocked. Under the high temperature condition during joint, the air-cooled constantan belt 1101 with the melting point of 1200-1260 ℃ is in direct contact with the stranded copper conductor 1, so that the abrasion of the air-cooled tube 11 on the stranded copper conductor 1 can be reduced, and the capacitance between the stranded copper conductor 1 and the air-cooled tube 11 due to the material difference can be reduced.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims. The components and structures not specifically described in this embodiment are well known in the art and are not described in detail herein.
Claims (8)
1. A built-in high strength metal tube stranded conductor air cooled cable comprising: the water-blocking tape wrapping protection layer (8) is sleeved in the outer sheath (10), a plurality of bundles of stranded copper conductors (1) are sleeved in the water-blocking tape wrapping protection layer (8), a plurality of air cooling pipes (11) are stranded in each bundle of stranded copper conductors (1), a semiconductive insulating layer (2) is sleeved outside each bundle of stranded copper conductors (1), a high-pressure-resistant crosslinked polyethylene insulating layer (3) is sleeved outside the semiconductive insulating layer (2), and a copper tape wrapping shielding layer (6) is sleeved outside the high-pressure-resistant crosslinked polyethylene insulating layer (3); and a filler (7) is arranged in a gap between the copper strip wrapping shielding layer (6) and the water-blocking strip wrapping protective layer (8).
2. The built-in high strength metal tube stranded conductor air cooled cable of claim 1 wherein said air cooled tube (11) comprises an air cooled Kang Tongdai (1101), said air cooled Kang Tongdai (1101) having a non-dense spring tube (1102) nested therein.
3. The built-in high strength metal pipe stranded conductor air cooled cable of claim 2, wherein small holes (1103) are uniformly opened on the air cooled Kang Tongdai (1101).
4. The built-in high strength metal pipe stranded conductor air cooled cable of claim 1 wherein an armor (9) is provided between the outer jacket (10) and the water blocking tape wrapping shield (8).
5. The built-in high-strength metal tube stranded conductor air-cooled cable according to claim 1, characterized in that an easy-to-peel semiconductive shielding layer (4) is arranged between the high-voltage-resistant crosslinked polyethylene insulating layer (3) and the copper strip wrapping shielding layer (6).
6. The built-in high-strength metal pipe stranded conductor air-cooled cable according to claim 5, characterized in that a high-strength polypropylene tape wrapping protective layer (5) is sleeved between the easy-stripping semiconductive shielding layer (4) and the copper tape wrapping shielding layer (6).
7. The built-in high strength metal tube stranded conductor air cooled cable of claim 1 wherein said filler (7) is a high water blocking vulcanized natural rubber.
8. A method for jointing an air-cooled cable with a built-in high-strength metal tube stranded conductor, which is implemented by adopting the built-in high-strength metal tube stranded conductor air-cooled cable according to any one of claims 1 to 7, and is characterized by comprising the following steps: step S001: in the case of two-section cable joints, half of the spring tube joints (1104) are inserted into each non-dense spring tube (1102) in one section of cable, and the other half of each spring tube joint (1104) is inserted into each corresponding non-dense spring tube (1102) in the other section of cable; step S002: and correspondingly welding each bundle of copper conductors (1) in the two sections of cables together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410117594.8A CN117976309A (en) | 2024-01-29 | 2024-01-29 | Built-in high-strength metal tube stranded conductor air-cooled cable and joint method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410117594.8A CN117976309A (en) | 2024-01-29 | 2024-01-29 | Built-in high-strength metal tube stranded conductor air-cooled cable and joint method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117976309A true CN117976309A (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410117594.8A Pending CN117976309A (en) | 2024-01-29 | 2024-01-29 | Built-in high-strength metal tube stranded conductor air-cooled cable and joint method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117976309A (en) |
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2024
- 2024-01-29 CN CN202410117594.8A patent/CN117976309A/en active Pending
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