CN112071495A - Reinforced overhead insulated cable and preparation method thereof - Google Patents
Reinforced overhead insulated cable and preparation method thereof Download PDFInfo
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- CN112071495A CN112071495A CN202010913219.6A CN202010913219A CN112071495A CN 112071495 A CN112071495 A CN 112071495A CN 202010913219 A CN202010913219 A CN 202010913219A CN 112071495 A CN112071495 A CN 112071495A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000010410 layer Substances 0.000 claims abstract description 89
- 238000010438 heat treatment Methods 0.000 claims abstract description 57
- 239000012792 core layer Substances 0.000 claims abstract description 49
- 238000004132 cross linking Methods 0.000 claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 40
- 238000001125 extrusion Methods 0.000 claims description 20
- 229920006231 aramid fiber Polymers 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229920000098 polyolefin Polymers 0.000 claims description 5
- 229910000077 silane Inorganic materials 0.000 claims description 5
- 239000004718 silane crosslinked polyethylene Substances 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 5
- 238000009941 weaving Methods 0.000 claims description 5
- 241000272165 Charadriidae Species 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000004760 aramid Substances 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/008—Power cables for overhead application
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- 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
- H01B7/17—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
- H01B7/1825—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of a high tensile strength core
-
- 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
- H01B7/17—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
- H01B7/221—Longitudinally placed metal wires or tapes
- H01B7/223—Longitudinally placed metal wires or tapes forming part of a high tensile strength core
-
- 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
- H01B7/17—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
- H01B7/228—Metal braid
-
- 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
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- 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
-
- 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
- H01B7/40—Insulated conductors or cables characterised by their form with arrangements for facilitating mounting or securing
-
- 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
- H01B9/021—Features relating to screening tape per se
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
Abstract
The invention provides a reinforced overhead insulated cable and a preparation method thereof, and relates to the technical field of insulated cables. The reinforced overhead insulated cable comprises a reinforcing core layer, a cable core layer, a shielding layer and an insulating layer which are sequentially arranged from inside to outside, wherein a fixed heating structure for fixing and heating the insulated cable is arranged on the periphery of the insulating layer; the preparation method comprises the steps of preparation of a reinforcing core layer, preparation of a cable core layer, preparation of a shielding layer, preparation of an insulating layer, irradiation crosslinking and assembly of a fixed heating structure. The fixing ring clamps and fixes the insulated cable, accumulated water and accumulated snow on the surface of the cable are heated and volatilized by heat emitted by the heating part, moisture is prevented from entering the inside of the cable, the cable is installed in an overhead mode through the fixing rope penetrating through the installation part, and the compression strength and the rain and snow resistance of the overhead insulated cable are improved.
Description
Technical Field
The invention relates to the technical field of insulated cables, in particular to a reinforced overhead insulated cable and a preparation method thereof.
Background
Overhead insulated cables are the main components of power transmission in urban and rural power grids, and currently, round hard aluminum conductors or aluminum alloy conductors formed by compressing round wires, semi-conductive inner shields (6KV and above) and weather-resistant insulating materials at 70 ℃ or 90 ℃ are generally adopted. With the transformation of a power grid, the overhead insulated cable has huge market demands and good development prospects. The existing overhead insulated cable only comprises conventional structures such as a cable core layer, a shielding layer and an insulating layer, and is lack of a reinforcing and heating structure, so that the compressive strength and the rain and snow resistance are to be further improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a reinforced overhead insulated cable and a preparation method thereof.
The invention solves the technical problems through the following technical means:
the invention provides a reinforced overhead insulated cable which comprises a reinforcing core layer, a cable core layer, a shielding layer and an insulating layer which are sequentially arranged from inside to outside, wherein a fixed heating structure for fixing and heating the insulated cable is arranged on the periphery of the insulating layer, the fixed heating structure comprises a fixing ring, a heating part and a mounting part, the fixing ring is fixedly arranged on the periphery of the insulating layer, the heating part is distributed on the periphery of the fixing ring in an annular array manner, and the mounting part is arranged at the top of the heating part.
Furthermore, the number of the heating parts is three to six, a plurality of through holes are formed in the inner area of the heating parts, heating pipes are installed in the through holes, and fixing holes are formed in the mounting holes.
Furthermore, the cable core layer takes the reinforcing core layer as a center and comprises a plurality of layers of stranded aluminum alloy wires distributed in an annular array from inside to outside.
Further, the multi-layer stranded aluminum alloy wire comprises an inner layer aluminum alloy wire, a middle layer aluminum alloy wire, a secondary outer layer aluminum alloy wire and an outer layer aluminum alloy wire.
The invention also provides a preparation method of the reinforced overhead insulated cable, which comprises the following steps:
a. preparing a reinforced core layer: selecting a plurality of aramid fiber yarns with the diameter of 0.2-0.5mm and the tensile strength of 880-1000MPa, and weaving copper strands at the periphery of the aramid fiber yarns after the aramid fiber yarns are rewound to a steel disc to obtain a reinforced core layer;
b. preparing a cable core layer: twisting a plurality of aluminum alloy wires into a compact round structure in a single line to form a plurality of layers of twisted aluminum alloy wires to cover the periphery of the reinforcing core layer;
c. preparing a shielding layer: extruding and molding the silane cross-linked polyolefin semi-conductive material at the periphery of the cable core layer to obtain a shielding layer;
d. preparing an insulating layer: extruding and molding the silane crosslinked polyethylene material at the periphery of the shielding layer to obtain the insulated cable with the insulating layer;
e. irradiation crosslinking: vacuum drying the insulated cable with the insulating layer at 80-90 ℃ for 1-2 hours, and then performing irradiation crosslinking;
f. assembling a fixed heating structure: and fixing the insulated cable subjected to irradiation crosslinking in the mounting ring, mounting the heating pipe in the through hole of the heating part, and penetrating and fixing the steel wire rope in the fixing hole of the mounting part to finish the preparation of the reinforced overhead insulated cable.
Further, the extrusion molding temperature in the step c is 140-150 ℃, and the extrusion speed is 30-40 m/min; the temperature of the extrusion molding in the step d is 180-200 ℃, and the extrusion speed is 40-50 m/min.
Further, the irradiation crosslinking conditions of the step e are as follows: the irradiation dose is 8-30Mrad, the irradiation power is 5MeV, double-sided irradiation is adopted, and the linear velocity is 20 m/min.
The invention has the beneficial effects that:
according to the aerial insulated cable, the reinforcing core layer is arranged inside the cable core layer, the fixing heating mechanism comprising the fixing ring, the heating part and the mounting part is arranged on the periphery of the insulating layer, the compressive strength of the cable is enhanced at the central part of the reinforcing core layer, the insulating cable is clamped and fixed by the fixing ring, accumulated water and accumulated snow on the surface of the cable are heated and volatilized by heat emitted by the heating part, moisture is prevented from entering the inside of the cable, the cable is installed in an aerial mode through the fixing rope of the mounting part, and the compressive strength and the rain and snow resistance of the aerial insulated cable are improved.
Drawings
Fig. 1 is a schematic structural view of a reinforced overhead insulated cable of the present invention.
In the figure: 1. reinforcing the core layer; 2. a cable core layer; 3. a shielding layer; 4. an insulating layer; 21. aluminum alloy wires in the inner layer; 22. aluminum alloy wires in the middle layer; 23. aluminum alloy wires on the secondary outer layer; 24. an outer layer of aluminum alloy wire; 51. a fixing ring; 52. a heating section; 53. an installation part; 54. heating a tube; 55. and (7) fixing holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Examples
As shown in fig. 1, the reinforced aerial insulated cable of the present embodiment includes a reinforcing core layer 1, a cable core layer 2, a shielding layer 3, and an insulating layer 4, which are sequentially disposed from inside to outside, a fixed heating structure 5 for fixing and heating the insulated cable is disposed on the periphery of the insulating layer 4, the fixed heating structure 5 includes a fixed ring 51, a heating portion 52, and an installation portion 53, the fixed ring 51 is fixedly disposed on the periphery of the insulating layer 4, the heating portion 52 is annularly and arraily distributed on the periphery of the fixed ring 51, and the installation portion 53 is disposed on the top of the heating portion 52. This embodiment compares with prior art's aerial insulated cable, set up in cable core layer 2's inside and strengthen sandwich layer 1, peripheral setting including solid fixed ring 51 at insulating layer 4, heating portion 52, installation department 53's fixed heating mechanism 5, central part's the compressive strength of reinforcing sandwich layer 1 at central part reinforced cable, gu fixed ring 51 presss from both sides the clamp to the insulated cable fixedly, the heat that heating portion 52 gived off is with the ponding and the snow heating volatilization on cable surface, inside avoiding moisture to get into the cable, the fixed rope that passes installation department 53 installs this aerial cable.
The number of the heating parts 52 is three to six, a plurality of through holes are formed in an inner region of the heating part 52, the heating pipes 54 are installed in the through holes, and fixing holes 55 are formed in the installation holes 53. A plurality of heating pipes 54 heat fixed ring 51, and fixed ring 51 absorbs heat and then conducts the heat to insulating layer 4, heats accumulated water and accumulated snow on the surface of insulating layer 4 to volatilize, and ensures the operation performance of the cable.
The cable core layer 2 takes the reinforced core layer 1 as a center and comprises a plurality of layers of stranded aluminum alloy wires distributed in an annular array from inside to outside. The cable core layer 2 is of a compact round structure formed by stranding aluminum alloy monofilaments with the diameter of 3mm on the whole.
The multi-layer stranded aluminum alloy wire comprises an inner layer aluminum alloy wire 21, a middle layer aluminum alloy wire 22, a secondary outer layer aluminum alloy wire 23 and an outer layer aluminum alloy wire 24, wherein the number of the inner layer aluminum alloy wire 21, the number of the middle layer aluminum alloy wire 22, the number of the secondary outer layer aluminum alloy wire 23 and the number of the outer layer aluminum alloy wire 24 are respectively 4-6, 6-8, 8-12 and 12-16. The multilayer stranded aluminum alloy wire consisting of the four layers of aluminum alloy wires is increased from inside to outside, so that the overall flexibility and strength of the cable are guaranteed.
Example 2
The preparation method of the reinforced overhead insulated cable comprises the following steps:
a. preparing a reinforced core layer: selecting a plurality of aramid fibers with the diameter of 0.3mm and the tensile strength of 950MPa, rewinding the aramid fibers to a steel disc, and weaving copper strands at the periphery of the aramid fibers to obtain a reinforced core layer;
b. preparing a cable core layer: twisting a plurality of aluminum alloy wires into a compact round structure in a single line to form a plurality of layers of twisted aluminum alloy wires to cover the periphery of the reinforcing core layer;
c. preparing a shielding layer: extruding and molding the silane cross-linked polyolefin semi-conductive material at the periphery of the cable core layer to obtain a shielding layer;
d. preparing an insulating layer: extruding and molding the silane crosslinked polyethylene material at the periphery of the shielding layer to obtain the insulated cable with the insulating layer;
e. irradiation crosslinking: vacuum drying the insulated cable with the insulating layer at 86 ℃ for 1.5 hours, and then performing irradiation crosslinking;
f. assembling a fixed heating structure: fixing the insulated cable after irradiation crosslinking in the mounting ring 51, installing the heating pipe 54 in the through hole of the heating part 52, and penetrating and fixing the steel wire rope in the fixing hole 55 of the installation part 53, thereby completing the preparation of the reinforced overhead insulated cable.
Wherein the extrusion molding temperature in the step c is 146 ℃, and the extrusion speed is 35 m/min; the extrusion molding temperature in the step d is 186 ℃, and the extrusion speed is 45 m/min; the irradiation crosslinking conditions in the step e are as follows: the irradiation dose is 28Mrad, the irradiation power is 5MeV, double-sided irradiation is adopted, and the linear velocity is 20 m/min.
Example 3
The preparation method of the reinforced overhead insulated cable comprises the following steps:
a. preparing a reinforced core layer: selecting a plurality of aramid fibers with the diameter of 0.45mm and the tensile strength of 900MPa, rewinding the aramid fibers to a steel disc, and weaving copper strands at the periphery of the aramid fibers to obtain a reinforced core layer;
b. preparing a cable core layer: twisting a plurality of aluminum alloy wires into a compact round structure in a single line to form a plurality of layers of twisted aluminum alloy wires to cover the periphery of the reinforcing core layer;
c. preparing a shielding layer: extruding and molding the silane cross-linked polyolefin semi-conductive material at the periphery of the cable core layer to obtain a shielding layer;
d. preparing an insulating layer: extruding and molding the silane crosslinked polyethylene material at the periphery of the shielding layer to obtain the insulated cable with the insulating layer;
e. irradiation crosslinking: vacuum drying the insulated cable with the insulating layer at 90 ℃ for 1.2 hours, and then carrying out irradiation crosslinking;
f. assembling a fixed heating structure: fixing the insulated cable after irradiation crosslinking in the mounting ring 51, installing the heating pipe 54 in the through hole of the heating part 52, and penetrating and fixing the steel wire rope in the fixing hole 55 of the installation part 53, thereby completing the preparation of the reinforced overhead insulated cable.
Wherein the extrusion molding temperature in the step c is 147 ℃, and the extrusion speed is 40 m/min; the extrusion molding temperature in the step d is 196 ℃, and the extrusion speed is 48 m/min; the irradiation crosslinking conditions in the step e are as follows: the irradiation dose is 20Mrad, the irradiation power is 5MeV, double-sided irradiation is adopted, and the linear velocity is 20 m/min.
Example 4
The preparation method of the reinforced overhead insulated cable comprises the following steps:
a. preparing a reinforced core layer: selecting a plurality of aramid fibers with the diameter of 0.28mm and the tensile strength of 970MPa, and after the aramid fibers are rewound to a steel disc, weaving copper strands at the periphery of the aramid fibers to obtain a reinforced core layer;
b. preparing a cable core layer: twisting a plurality of aluminum alloy wires into a compact round structure in a single line to form a plurality of layers of twisted aluminum alloy wires to cover the periphery of the reinforcing core layer;
c. preparing a shielding layer: extruding and molding the silane cross-linked polyolefin semi-conductive material at the periphery of the cable core layer to obtain a shielding layer;
d. preparing an insulating layer: extruding and molding the silane crosslinked polyethylene material at the periphery of the shielding layer to obtain the insulated cable with the insulating layer;
e. irradiation crosslinking: vacuum drying the insulated cable with the insulating layer at 86 ℃ for 1.8 hours, and then performing irradiation crosslinking;
f. assembling a fixed heating structure: fixing the insulated cable after irradiation crosslinking in the mounting ring 51, installing the heating pipe 54 in the through hole of the heating part 52, and penetrating and fixing the steel wire rope in the fixing hole 55 of the installation part 53, thereby completing the preparation of the reinforced overhead insulated cable.
Wherein the extrusion molding temperature in the step c is 150 ℃, and the extrusion speed is 37 m/min; the extrusion molding temperature in the step d is 193 ℃, and the extrusion speed is 43 m/min; the irradiation crosslinking conditions in the step e are as follows: the irradiation dose is 26Mrad, the irradiation power is 5MeV, double-sided irradiation is adopted, and the linear velocity is 20 m/min.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The built on stilts insulated cable of strenghthened type, its characterized in that: the cable comprises a reinforcing core layer (1), a cable core layer (2), a shielding layer (3) and an insulating layer (4) which are sequentially arranged from inside to outside, wherein a fixed heating structure (5) for fixing and heating an insulated cable is arranged on the periphery of the insulating layer (4), the fixed heating structure (5) comprises a fixing ring (51), a heating part (52) and an installation part (53), the fixing ring (51) is fixedly arranged on the periphery of the insulating layer (4), the heating part (52) is distributed on the periphery of the fixing ring (51) in an annular array manner, and the installation part (53) is arranged on the top of the heating part (52).
2. The reinforced overhead insulated cable of claim 1, wherein: the number of the heating parts (52) is three to six, a plurality of through holes are formed in the inner area of each heating part (52), heating pipes (54) are installed in the through holes, and fixing holes (55) are formed in the installation holes (53).
3. The reinforced overhead insulated cable of claim 1, wherein: the cable core layer (2) takes the reinforcing core layer (1) as a center and comprises a plurality of layers of stranded aluminum alloy wires which are distributed in an annular array from inside to outside.
4. The reinforced overhead insulated cable of claim 3, wherein: the multi-layer stranded aluminum alloy wire comprises an inner layer aluminum alloy wire (21), a middle layer aluminum alloy wire (22), a secondary outer layer aluminum alloy wire (23) and an outer layer aluminum alloy wire (24).
5. The preparation method of the reinforced overhead insulated cable is characterized by comprising the following steps: the method comprises the following steps:
a. preparing a reinforced core layer: selecting a plurality of aramid fiber yarns with the diameter of 0.2-0.5mm and the tensile strength of 880-1000MPa, and weaving copper strands at the periphery of the aramid fiber yarns after the aramid fiber yarns are rewound to a steel disc to obtain a reinforced core layer;
b. preparing a cable core layer: twisting a plurality of aluminum alloy wires into a compact round structure in a single line to form a plurality of layers of twisted aluminum alloy wires to cover the periphery of the reinforcing core layer;
c. preparing a shielding layer: extruding and molding the silane cross-linked polyolefin semi-conductive material at the periphery of the cable core layer to obtain a shielding layer;
d. preparing an insulating layer: extruding and molding the silane crosslinked polyethylene material at the periphery of the shielding layer to obtain the insulated cable with the insulating layer;
e. irradiation crosslinking: vacuum drying the insulated cable with the insulating layer at 80-90 ℃ for 1-2 hours, and then performing irradiation crosslinking;
f. assembling a fixed heating structure: fixing the insulated cable after irradiation crosslinking in a mounting ring (51), mounting a heating pipe (54) in a through hole of a heating part (52), and penetrating and fixing a steel wire rope in a fixing hole (55) of a mounting part (53) to finish the preparation of the reinforced overhead insulated cable.
6. The preparation method of the reinforced overhead insulated cable according to claim 5, wherein: the extrusion molding temperature in the step c is 140-150 ℃, and the extrusion speed is 30-40 m/min; the temperature of the extrusion molding in the step d is 180-200 ℃, and the extrusion speed is 40-50 m/min.
7. The preparation method of the reinforced overhead insulated cable according to claim 5, wherein: the irradiation crosslinking conditions in the step e are as follows: the irradiation dose is 8-30Mrad, the irradiation power is 5MeV, double-sided irradiation is adopted, and the linear velocity is 20 m/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010913219.6A CN112071495A (en) | 2020-09-03 | 2020-09-03 | Reinforced overhead insulated cable and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010913219.6A CN112071495A (en) | 2020-09-03 | 2020-09-03 | Reinforced overhead insulated cable and preparation method thereof |
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| CN112071495A true CN112071495A (en) | 2020-12-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0935533A (en) * | 1995-07-25 | 1997-02-07 | Furukawa Electric Co Ltd:The | Snow thawing electric wire and its manufacture |
| CN103578632A (en) * | 2013-10-11 | 2014-02-12 | 泛亚电缆集团有限公司 | Shielding rubber-jacketed flexible cable for coal cutter |
| CN104992743A (en) * | 2015-07-10 | 2015-10-21 | 德州暖康碳纤维科技有限公司 | Deicing carbon-fiber-based high-low-voltage overhead cable |
| CN105575460A (en) * | 2016-03-17 | 2016-05-11 | 陕西永光电力电缆制造有限公司 | Insulating aerial aluminum alloy cable and preparation method thereof |
| CN206134328U (en) * | 2016-10-11 | 2017-04-26 | 广东冠华传导科技有限公司 | Medium strength aerial [insulated] cable |
| CN111430081A (en) * | 2020-05-14 | 2020-07-17 | 朱永松 | Special cable for harsh environment |
-
2020
- 2020-09-03 CN CN202010913219.6A patent/CN112071495A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0935533A (en) * | 1995-07-25 | 1997-02-07 | Furukawa Electric Co Ltd:The | Snow thawing electric wire and its manufacture |
| CN103578632A (en) * | 2013-10-11 | 2014-02-12 | 泛亚电缆集团有限公司 | Shielding rubber-jacketed flexible cable for coal cutter |
| CN104992743A (en) * | 2015-07-10 | 2015-10-21 | 德州暖康碳纤维科技有限公司 | Deicing carbon-fiber-based high-low-voltage overhead cable |
| CN105575460A (en) * | 2016-03-17 | 2016-05-11 | 陕西永光电力电缆制造有限公司 | Insulating aerial aluminum alloy cable and preparation method thereof |
| CN206134328U (en) * | 2016-10-11 | 2017-04-26 | 广东冠华传导科技有限公司 | Medium strength aerial [insulated] cable |
| CN111430081A (en) * | 2020-05-14 | 2020-07-17 | 朱永松 | Special cable for harsh environment |
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Application publication date: 20201211 |