CN113066612A - Medium-voltage smooth aluminum-sheathed armored power cable - Google Patents
Medium-voltage smooth aluminum-sheathed armored power cable Download PDFInfo
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- CN113066612A CN113066612A CN202110168527.5A CN202110168527A CN113066612A CN 113066612 A CN113066612 A CN 113066612A CN 202110168527 A CN202110168527 A CN 202110168527A CN 113066612 A CN113066612 A CN 113066612A
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 96
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- 239000004020 conductor Substances 0.000 claims abstract description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 21
- 229910052802 copper Inorganic materials 0.000 claims description 20
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
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Images
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
-
- 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
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing 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
-
- 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
- H01B7/20—Metal tubes, e.g. lead sheaths
- H01B7/205—Metal tubes, e.g. lead sheaths composed of aluminium
-
- 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
-
- 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
- H01B7/2806—Protection against damage caused by corrosion
-
- 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
-
- 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
-
- 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
- Insulated Conductors (AREA)
Abstract
The invention relates to a medium-voltage smooth aluminum-sheathed armored power cable which comprises a plurality of compressed conductors, wherein a semiconductive inner shielding layer is extruded on the surface of each compressed conductor, an insulating layer is extruded on the surface of the semiconductive inner shielding layer, a semiconductive outer shielding layer is extruded on the surface of the insulating layer, a filler is added in a gap part of a red wire core, a green wire core and a yellow wire core after the three wire cores are twisted, a semiconductive slow-release layer is wrapped on the twisted wire cores, the surface of the semiconductive slow-release layer is welded and is provided with a corrugated smooth aluminum sheath, and a PVC sheath of the cable is extruded on the surface of the smooth aluminum sheath; the smooth aluminum sleeve of the cable effectively improves the heat dissipation of the cable, has long service life, ensures that the electric field is uniformly distributed, controls the electric potential, limits the electric field, avoids generating partial discharge on the insulating surface, transmits leakage current and charging current, conducts fault current, protects the maintained contact voltage and protects moisture.
Description
Technical Field
The invention belongs to the technical field of cables, and particularly relates to a medium-voltage smooth aluminum-sheathed armored power cable.
Background
Along with the frequent occurrence of fire accidents, people continuously deepen the understanding of the fire hazard risk of the electric wire and the electric cable, and the requirements of relevant departments on the performances of fire prevention, flame retardance and the like of the electric wire and the electric cable are higher and higher. The cable fire disaster has the characteristics of fast spread, difficult fire fighting, secondary hazard generation, long recovery time and the like, and can bring huge loss to national economy and the lives and properties of people. Therefore, more severe operating conditions are provided for the flame retardant property, the fireproof property and the safety and reliability of the wires and cables. If the fire-fighting elevator and the fire pump are in fire prevention, explosion prevention, strong overload capacity and long service life, the fire-fighting elevator and the fire pump need to be kept in normal operation for a certain time under the condition of fire, and the cable has special requirements of low smoke, low halogen and low toxicity after combustion, even no smoke, no halogen, no toxicity and the like. The fire-retardant and fire-proof measures of the cable are important means for reducing the fire delay of the cable, and the key point is that the fire-retardant and fire-proof measures are mainly used for preventing fire, and various fire-retardant cables, fire-resistant cables and fire-proof cables are widely applied.
The existing cable fireproof material structure is generally a single-layer structure, the physical impact resistance protection level is low, the function is single, meanwhile, the fireproof capacity of the material is poor, the material cannot resist fire for a long time, the heat insulation performance is poor under the condition that a burning object exists in the surrounding environment, the high-temperature protection effect cannot be achieved, and the cable is damaged to cause danger.
The aluminum sleeve of the common cable in the market mainly plays a role in bearing short-circuit current, radially blocking water, shielding an electric field and bearing external mechanical stress, and the smooth aluminum sleeve is a novel aluminum sleeve, so that the contact area is increased, capacitive discharge is eliminated, the water blocking performance of the cable is improved, and the outer diameter of the cable is reduced.
After the water-blocking powder on the slow-release layer of the smooth aluminum-sheathed cable absorbs water, the water-blocking powder can form free OH-ions, and white powder is produced on the contact inner side of the aluminum sheath and the buffer layer, because aluminum is amphoteric metal, the aluminum can react with acid and alkali.
Therefore, OH-at the contact part of the aluminum sleeve and the buffer layer reacts with aluminum, and under the action of an electric field, OH-can be more easily gathered at the contact position of the aluminum sleeve and the buffer layer, the aluminum reacts with alkali (0H-), the sodium metaaluminate generated by the reaction is very soluble in water, and the CO2 in the air is absorbed to react as follows:
CO2when the dosage is excessive: a102+CO2+2H2O＝A1(OH)3↓+HCO3.
CO2When the amount is small: 2A1O2+CO2+3H20＝2Al(OH)3↓+CO3-.
The aluminum hydroxide can be continuously reacted to generate aluminum oxide: 2AI (OH)3＝Al2O3+3H2O to form white crystal Al2O3In this case, the aluminum element in the aluminum jacket is transferred to the buffer layer to form white powder; thereby affecting the safety of the cable.
In view of the above technical problems, improvements are needed.
Disclosure of Invention
The invention provides a medium-voltage smooth aluminum sheath armored power cable for overcoming the defects in the prior art, which is suitable for power frequency rated voltage of 3.6/6 KV-26/35 KV power transmission and distribution lines for distributing electric energy.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a medium-voltage smooth aluminum-sheathed armored power cable comprises a plurality of strands of compressed conductors, wherein the surfaces of the plurality of strands of compressed conductors are extruded with a semiconductive inner shielding layer, the surface of the semiconductive inner shielding layer is extruded with an insulating layer, the surface of the insulating layer is extruded with a semiconductive outer shielding layer, and red color bands are added on the surface of the semiconductive outer shielding layer to form a red wire core on a wrapped copper strip; after a green colored tape is added on the surface of the semi-conductive outer shielding layer, a green wire core is formed by wrapping a copper strip; after a yellow colored tape is added on the surface of the semi-conductive outer shielding layer, a yellow wire core is formed by wrapping a copper strip; after the red wire core, the green wire core and the yellow wire core are twisted, filling materials are added to gaps of the red wire core, then a semi-conductive slow release layer is wrapped on the twisted wire cores, the surface of the semi-conductive slow release layer is welded and is provided with a corrugated smooth cable aluminum sleeve, and the surface of the smooth cable aluminum sleeve is extruded with a cable PVC sheath.
The smooth aluminum sleeve of the cable effectively improves the heat dissipation of the cable, has long service life, ensures that the electric field is uniformly distributed, controls the electric potential, limits the electric field, avoids generating partial discharge on the insulating surface, transmits leakage current and charging current, conducts fault current, protects the maintained contact voltage (contact protection), and protects moisture (can prevent current from entering water).
The invention replaces steel belts and lead sleeve armoring, further improves the compression resistance and the bending property, is beneficial to installation and laying after reducing the weight of the cable, improves the transmission efficiency, has no pollution to the environment, also improves the capacity of bearing short-circuit current and the performance of a shielding layer, has good bending property, and is easier to realize the manufacture and installation of the end of the cable.
The utility model provides a smooth aluminium cover armor power cable of middling pressure, has introduced the structural design of this cable, and material selection and key technology show through producing the performance testing result to product, and this cable has good mechanical properties, compressive property, bending resistance, humidity resistance, wearability, corrosion resistance, tensile resistance and high gentle characteristic, and its light in weight, heat dispersion is good, and is alkaline-resisting, characteristics such as resistant oil.
As a preferable aspect of the present invention, the number of the compressed conductors is 3.
As a preferred aspect of the present invention, the compacted conductor is copper or aluminum.
As a preferable scheme of the invention, the cable smooth aluminum sleeve is made of aluminum material with the purity of not less than 99.6 percent; the smooth aluminum sheath for the cable can properly reduce the content of water-blocking powder in the water-blocking tape, and is regulated and controlled by the index of pH (7.2 +/-0.3) in the standard T/CAS374-2019 semi-conductive level punching layer material for extruded insulation power cables with rated voltage of above 26/35kV of the China standardization institute group.
As a preferable scheme of the invention, the elongation of the aluminum strip of the cable smooth aluminum sleeve is not less than 16%; the eddy current loss in the aluminum sleeve can be reduced through the structural design of the protective layer; researches show that the eddy current loss in the aluminum sheath is multiplied by the thickness, and the eddy current loss in the aluminum sheath can be reduced by reducing the thickness of the aluminum sheath.
In a preferable embodiment of the invention, the outer diameter of the compacted conductor is 6.0-29.8 mm.
In a preferred embodiment of the present invention, the thickness of the semiconductive inner shield layer is 0.7 mm.
In a preferred embodiment of the present invention, the thickness of the insulating layer is 2.5 to 10.5 mm.
In a preferred embodiment of the present invention, the thickness of the semiconductive outer shield layer is 0.7 mm.
As a preferable scheme of the invention, the thickness of the PVC sheath of the cable is 2.4-5.1 mm.
The invention has the beneficial effects that:
1. the smooth aluminum sleeve of the cable effectively improves the heat dissipation of the cable, has long service life, ensures that the electric field is uniformly distributed, controls the electric potential, limits the electric field, avoids generating partial discharge on the insulating surface, transmits leakage current and charging current, conducts fault current, protects the maintained contact voltage (contact protection), and protects moisture (can prevent current from entering water);
2. the smooth aluminum sheath for the cable can properly reduce the content of water-blocking powder in the water-blocking tape, and is regulated to adopt the index of pH (7.2 +/-0.3) in the standard T/CAS 374-shaped society of standardization of China Association 2019 semiconductive-level punching layer material for the extrusion-coated insulated power cable with rated voltage of 26/35 kV;
3. the eddy current loss in the aluminum sleeve can be reduced through the structural design of the protective layer; researches show that the eddy current loss in the aluminum sheath is multiplied by the thickness, and the eddy current loss in the aluminum sheath can be reduced by reducing the thickness of the aluminum sheath;
4. the design of the smooth aluminum jacket of the present invention eliminates air gaps between the buffer layers, reducing the thermal resistance increase of about 0.1 km/w. The test results show that the medium voltage cable below 35 kV: the current-carrying capacity of the smooth aluminum sleeve structure is about 8 percent higher than that of the corrugated aluminum sleeve under the same condition;
5. the smooth aluminum sleeve for the cable is designed to be a smooth structure, and the surface of the smooth aluminum sleeve is not wrinkled, so that the outer diameter of the cable is reduced by about 3-6% (according to different voltage levels of the cable), the cable is lighter, and the cost is lower;
6. the average cable coil loading length of the smooth sheath can be improved by about 2 percent;
7. the smooth aluminum sleeve for the cable solves the problem of contact between the aluminum sheath and the buffer layer, can achieve the degree of surface contact, and enables current to uniformly flow through the buffer layer;
8. the smooth aluminum sleeve for the cable has uniform aluminum nuclear tensile strength along the circumferential direction.
Drawings
Fig. 1 is a side view of a medium voltage corrugated copper sheathed armored power cable according to an embodiment of the invention.
Fig. 2 is a cross-sectional view of a medium voltage corrugated copper sheathed armored power cable according to an embodiment of the invention.
Reference numbers in the figures: the compact type cable comprises a compact conductor 1, a semi-conductive inner shielding layer 2, an insulating layer 3, a semi-conductive outer shielding layer 4, a copper strip 5, a filling material 6, a semi-conductive slow release layer 7, a cable smooth aluminum sleeve 8, a cable PVC sheath 9, a red color band 11, a green color band 12 and a yellow color band 13.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood 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.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows:
as shown in fig. 1-2, the present embodiment provides a medium-voltage smooth aluminum-sheathed armored power cable, which includes a plurality of compressed conductors 1, wherein the number of compressed conductors 1 is 3, and the compressed conductors 1 are made of copper or aluminum; the surface of a plurality of strands of compressed conductors 1 is extruded with a semi-conductive inner shielding layer 2, the surface of the semi-conductive inner shielding layer 2 is extruded with an insulating layer 3, the surface of the insulating layer 3 is extruded with a semi-conductive outer shielding layer 4, and a red color ribbon 11 is added on the surface of the semi-conductive outer shielding layer 4 to form a red wire core on a wrapped copper strip 5; after a green color band 12 is added on the surface of the semi-conductive outer shielding layer 4, a green wire core is formed by wrapping a copper strip 5; a yellow color ribbon 13 is added on the surface of the semi-conductive outer shielding layer 4, and then a yellow wire core is formed by wrapping the copper strip 5; after the red wire core, the green wire core and the yellow wire core are twisted, the filling material 6 is added in the gap position, then the twisted wire cores are wrapped with the semi-conductive slow release layer 7, the surface of the semi-conductive slow release layer 7 is welded and embossed with the smooth aluminum sleeve 8 of the cable, and the surface of the smooth aluminum sleeve 8 of the cable is extruded with the PVC sheath 9 of the cable.
The smooth aluminum sleeve for the cable effectively improves the heat dissipation performance of the cable, has long service life, high reliability, small influence by weather conditions and surrounding environment and stable transmission performance, and is suitable for various natural high-temperature environments; generally, the soil can bear the action of external mechanical force after being buried in soil or laid in indoor, outdoor, cable trench, pipeline trench, underground soil or tunnel.
The invention replaces steel belts and lead sleeve armoring, improves the compression resistance and the bending property, is beneficial to installation and laying after reducing the weight of the cable, improves the transmission efficiency, has no pollution to the environment, good ageing resistance, corrosion resistance and good insulation property, meets the requirement of single-phase fault short-circuit current, improves the capacity of bearing the short-circuit current and the performance of a shielding layer, has good bending property, and is easier to realize the manufacture and installation of the end of the cable.
Wherein, the filling material 6 is a filling rope which is added for filling a cable into a circle, and the insulating layer 3 is polyethylene insulation;
specifically, the semiconductive slow release layer requires: the thickness of the semi-conductive slow release layer can meet the requirement of compensating thermal expansion in the operation of the cable; the semi-conductive slow release layer is made of elastic materials, and the wrapping is tight and smooth; the semiconductive slow release layer should make the insulating semiconductive shielding layer and the metal shielding layer keep good electrical contact.
The cable smooth aluminum sleeve 8 material requirements are as follows: the smooth aluminum sheath 8 of the cable is made of copper material with the purity not lower than 99.9 percent: the elongation of the copper strip is not less than 35%, and the tensile strength is not less than 250mm 2; the cable smooth aluminum sleeve 8 is used for protecting the power cable from the invasion of external impurities and moisture and preventing external force from directly damaging the power cable; the medium-voltage corrugated copper sleeve armored power cable has the advantages that the mechanical performance and the strength of a cable core are improved, certain tensile force in the vertical direction can be borne, and the comprehensive performance of the product is improved. After the cable outer sheath is extruded outside the corrugated copper sleeve, the flame retardant capability of the power cable is effectively improved, the safety of the power cable is also improved, and the cable outer sheath has good wear resistance, tensile resistance and high flexibility.
The design of the smooth aluminum jacket of the present invention eliminates air gaps between the buffer layers, reducing the thermal resistance increase of about 0.1 km/w. The test results show that the medium voltage cable below 35 kV: the current-carrying capacity of the smooth aluminum sleeve structure is about 8 percent higher than that of the corrugated aluminum sleeve under the same condition; the smooth aluminum sleeve of the cable is designed to be a smooth structure, and the surface of the smooth aluminum sleeve is not wrinkled, so that the outer diameter of the cable is reduced by about 3-6% (according to different voltage levels), the cable is lighter, and the cost is lower; the average cable coil length of the smooth sheath can be improved by about 2%.
The difference of the processing technology of the smooth aluminum sleeve and the corrugated aluminum sleeve is as follows:
1. the smooth aluminum sleeve of the invention is formed in one step (argon arc welding longitudinal welding or continuous extrusion), while the corrugated aluminum sleeve needs to be formed in two steps, firstly a round tube is manufactured, and then the corrugated aluminum sleeve is rolled:
2. the internal diameter of the smooth aluminum sleeve is easy to control, the internal diameter of the corrugated aluminum sleeve is controlled more complicated, and the internal diameter of the corrugated aluminum sleeve has a great relationship with the depth of the embossing;
3. the smooth aluminum sleeve has low processing energy consumption.
The smooth aluminum sleeve for the cable solves the problem of contact between the aluminum sheath and the buffer layer, can achieve the degree of surface contact, and enables current to uniformly flow through the buffer layer; the core tension strength of the aluminum of the smooth aluminum sleeve of the cable along the circumferential direction is uniform.
Meets the standard requirements of the copper wire billet for GB/T3952-.
1. A process meter of a smooth aluminum sleeve armored power cable with the rated voltage of 3.6/6 KV;
example two:
a power cable handicraft watch with smooth aluminum sleeves and armored with rated voltage of 6/6KV and 6/10 KV;
other contents in this embodiment can refer to embodiment one.
Example three:
the rated voltage is 8.7/10KV,8.7/15KV smooth aluminum sheath armored power cable process table;
other contents in this embodiment may refer to the first embodiment or the second embodiment.
Example four:
a rated voltage 12/20KV smooth aluminum sleeve armored power cable process meter;
other contents in this embodiment may refer to embodiment one, embodiment two, or embodiment three.
Example five:
a rated voltage 18/30KV smooth aluminum sleeve armored power cable process meter;
other contents in this embodiment may refer to embodiment one, embodiment two, embodiment three, or embodiment four.
Example six:
a rated voltage 21/35KV smooth aluminum sleeve armored power cable process meter;
other contents in this embodiment may refer to embodiment one, embodiment two, embodiment three, embodiment four, or embodiment five.
Example seven:
a rated voltage 26/35KV smooth aluminum sleeve armored power cable process meter;
other contents in this embodiment may refer to embodiment one, embodiment two, embodiment three, embodiment four, embodiment five, or embodiment six.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more here: the terms compressed conductor 1, semiconductive inner shield layer 2, insulating layer 3, semiconductive outer shield layer 4, copper strip 5, filler 6, semiconductive slow release layer 7, cable smooth aluminum jacket 8, cable PVC jacket 9, red color bar 11, green color bar 12, yellow color bar 13, etc., but do not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. The utility model provides a level and smooth aluminium sheathing armoured power cable of middling pressure which characterized in that: the cable comprises a plurality of compressed conductors (1), a semiconductive inner shielding layer (2) is extruded on the surface of each compressed conductor (1), an insulating layer (3) is extruded on the surface of the semiconductive inner shielding layer (2), a semiconductive outer shielding layer (4) is extruded on the surface of the insulating layer (3), and a red color ribbon (11) is added on the surface of the semiconductive outer shielding layer (4) and then a red wire core is formed by wrapping a copper strip (5); a green color ribbon (12) is added on the surface of the semi-conductive outer shielding layer (4) and then a green wire core is formed by wrapping a copper strip (5); a yellow color ribbon (13) is added on the surface of the semi-conductive outer shielding layer (4) and then a yellow wire core is formed by wrapping a copper strip (5); after the red wire core, the green wire core and the yellow wire core are twisted, a filling material (6) is added in the gap position of the red wire core, the green wire core and the yellow wire core, a semi-conductive slow release layer (7) is wrapped on the twisted wire core, the surface of the semi-conductive slow release layer (7) is welded and is provided with a corrugated smooth cable aluminum sleeve (8), and the surface of the smooth cable aluminum sleeve (8) is extruded with a cable PVC sheath (9).
2. A medium voltage smooth aluminium jacketed armoured power cable according to claim 1 characterized in that the number of compacted conductors (1) is 3 strands.
3. A medium voltage smooth aluminium jacketed armoured power cable according to claim 1 or 2 characterized in that the compacted conductor (1) is copper or aluminium.
4. A medium voltage smooth aluminium jacketed armoured power cable according to claim 1 characterized in that the cable smooth aluminium jacket (8) is made of aluminium with a purity not less than 99.6%.
5. A medium voltage smooth aluminium jacketed armoured power cable according to claim 4 characterized in that the aluminium strip of the cable smooth aluminium jacket (8) should have an elongation not less than 16%.
6. A medium voltage smooth aluminium jacketed armoured power cable according to claim 1 characterized in that the compressed conductor (1) has an outer diameter of 6.0-29.8 mm.
7. A medium voltage smooth aluminium sheathed armoured power cable according to claim 1 characterized in that the semi-conductive inner shield layer (2) has a thickness of 0.7 mm.
8. A medium voltage smooth aluminium jacketed armoured power cable according to claim 1 characterized in that the thickness of the insulating layer (3) is 2.5-10.5 mm.
9. A medium voltage smooth aluminium jacketed armoured power cable according to claim 1 characterized in that the thickness of the semi-conductive outer shield layer (4) is 0.7 mm.
10. A medium voltage smooth aluminium sheathed armoured power cable according to claim 1 characterized in that the thickness of the cable PVC sheath (9) is 2.4-5.1 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110168527.5A CN113066612A (en) | 2021-02-07 | 2021-02-07 | Medium-voltage smooth aluminum-sheathed armored power cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168527.5A CN113066612A (en) | 2021-02-07 | 2021-02-07 | Medium-voltage smooth aluminum-sheathed armored power cable |
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| CN113066612A true CN113066612A (en) | 2021-07-02 |
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| CN201378460Y (en) * | 2009-04-10 | 2010-01-06 | 杨斌 | Novel cross-linked cable |
| CN201788740U (en) * | 2010-07-23 | 2011-04-06 | 浙江万马电缆股份有限公司 | Novel smooth-type aluminum-sheathed cable |
| CN203520989U (en) * | 2013-08-08 | 2014-04-02 | 光昭（上海）贸易有限公司 | High-efficiency crosslinked bunched power cable with color bands |
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Application publication date: 20210702 |