CN109585084A - A kind of copper core lv power cable and manufacturing method with sheathed structure - Google Patents
A kind of copper core lv power cable and manufacturing method with sheathed structure Download PDFInfo
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- CN109585084A CN109585084A CN201910002776.XA CN201910002776A CN109585084A CN 109585084 A CN109585084 A CN 109585084A CN 201910002776 A CN201910002776 A CN 201910002776A CN 109585084 A CN109585084 A CN 109585084A
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- copper core
- layer
- core
- support bar
- parting bead
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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
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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
- H01B13/06—Insulating conductors or cables
-
- 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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
-
- 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
- H01B7/02—Disposition of insulation
-
- 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
- H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
- H01B7/1815—Protections not provided for in groups H01B7/182 - H01B7/26 composed of longitudinal inserts
-
- 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
- H01B7/183—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of an outer sheath
-
- 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
- H01B7/1875—Multi-layer sheaths
-
- 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
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
-
- 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
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
Abstract
The invention discloses a kind of copper core lv power cable with sheathed structure, including internal layer sheath, there are multiple copper core conductors in circumferential array inside the internal layer sheath, the middle position that multiple copper core conductors surround is provided with supporting-core, parting bead identical with copper core number of conductors is radially extended on the supporting-core, the parting bead is bonded and surrounds copper core conductor between the other side and another copper core conductor, and support bar is provided between two copper core conductors, aluminium alloy armored layer is enclosed with outside the internal layer sheath, outer protective sleeve is enclosed with outside the aluminium alloy armored layer, it is triangle that the support bar, which obtains cross section, one apex angle is connect with parting bead, three sides are the arcwall face of outward opening, resin adhesive layer is coated on the side of the parting bead and support bar.Cable of the present invention has stronger mechanical strength and anti-extrusion ability, it is not easy to it deforms, while manufacture craft is simple, it is high-efficient.
Description
Technical field
The present invention relates to the technical fields of cable processing, more particularly, to a kind of copper core low-voltage power with sheathed structure
Cable and manufacturing method.
Background technique
Power cable is the cable for being used for transmission and distributing electric energy, and power cable is usually used in Urban Underground power grid, power station
Lead line, industrial and mining enterprises' in-line power and mistake river sea submarine transmission line.Power cable is in the basic routing line of electric system
Transmitting and distribute the cable product of high-power power, including 1-500KV and more than various voltage class, various insulation
Power cable.By voltage class can be divided into, lv power cable (35 kilovolts and less), high-tension cable (110 kilovolts or more),
Extra-high-tension cable (275-800 kilovolts) and extra-high-tension cable (1000 kilovolts or more).Wherein, low-voltage cable is suitable for fixing
It is laid in and exchanges 50Hz, voltage rating 3kv and transmission and distribution line below road are used as to convey electric energy.
The basic structure of power cable is made of core (conductor), insulating layer, shielded layer and four part of protective layer.Core is
The current-carrying part of power cable is the major part of power cable for conveying electric energy.Insulating layer be by core and the earth and
It is being electrically isolated from each other between out of phase core, is guaranteeing electrical energy transportation, be indispensable composition portion in power cable structure
Point.The power cable of 15KV or more generally has conductor shield and insulation screen.The effect of protective layer is protection electric power
Cable and prevents external force from directly damaging power cable from the intrusion of introduced contaminants and moisture.
Armouring is that one layer of high-intensitive material of the outer bread of cable core is used to protect cable, to prevent pounding, pressing, rack cable sheath
Damage core leads to a kind of protective layer of short circuit afterwards.Cable enhances the mechanical performances such as tensile strength, compression strength plus armor,
Have the function of prolonging the service life simultaneously and mouse bite preventing.Common armoring material has steel band, steel wire, aluminium strip, aluminum pipe etc., armouring
Layer has high permeability, can make armored cable directly buried installation and from poling, and it is good and cheap more in practice.Armouring electricity
Cable mechanical protection layer may be added on the cable of any structure, to increase the mechanical strength of cable, improve erosion prevention, be for
Vulnerable to mechanical damage and extremely erodible area and the telephone cable designed.It can be laid using any method, it is more suitable
Directly buried installation for Rock Region.
Armored cable is usually fixed power cable laying, it is popular for be exactly to be fixed on a place and do not move substantially
Dynamic, power line transmits electric energy.Cable adds the purpose of armor in addition to above, can also enhance tensile strength, compression strength etc.
Mechanical protection prolongs the service life.Armouring has certain external force resistance performance, can also watch out for mouse and bait, and is unlikely to through armour
Dress causes power transmission problem, and the bending radius of armouring is big, and armor can be grounded, and protects cable.Existing armored cable is deposited
In many deficiencies: filler support force difference causes sheathed structure easily-deformable, and sheathed structure and construction of cable associativity are poor, armouring
Structure consumption vast resources, cost are excessively high.
Summary of the invention
The object of the present invention is to provide a kind of copper core lv power cable and manufacturing method with sheathed structure, makes cable
With stronger mechanical strength and anti-extrusion ability, it is not easy to it deforms, while manufacture craft is simple, it is high-efficient.
Foregoing invention purpose of the invention has the technical scheme that
A kind of copper core lv power cable with sheathed structure, including internal layer sheath, the internal layer sheath inside is in circumferential row
Multiple copper core conductors are shown, it is in diameter on the supporting-core that the middle position that multiple copper core conductors surround, which is provided with supporting-core,
To parting bead identical with copper core number of conductors is extended with, the parting bead is bonded and surrounds copper core conductor to the other side and another copper
Between core conductor, and it is provided with support bar between two copper core conductors, is enclosed with aluminium alloy armored outside the internal layer sheath
Layer, outer protective sleeve is enclosed with outside the aluminium alloy armored layer.
By using above-mentioned technical proposal, supporting-core is set among multiple copper core conductors, by parting bead by copper core conductor
It wraps, and is squeezed between copper core conductor by support bar, keep the connection between inner core closer, pass through support bar and supporting-core
Cooperation, enhances the mechanical strength and anti-pressure ability of entire cable.
The present invention is further arranged to: the cross section of the support bar is triangle, one apex angle is connect with parting bead, three
A side is the arcwall face of outward opening.
By using above-mentioned technical proposal, support bar is set preferably to be bonded with copper core conductor lateral surface, core arrangement
Closer, anti-pressure ability is strong.
The present invention is further arranged to: being coated with resin adhesive layer on the side of the parting bead and support bar.
By using above-mentioned technical proposal, can parting bead and support bar be connect closer with copper core conductor, form one
A better entirety, total is more closely knit, and anti-pressure ability is more preferable.
The present invention is further arranged to: being provided with fiberglass insulation on the outside of the copper core conductor.
By using above-mentioned technical proposal, the heatproof of glass fibre is high, can bear what electric current in conductor generated for a long time
Heat, meanwhile, the high mechanical strength of glass fibre has very strong tensile resistance, in addition, glass fibre has very highland anti-
Corrosive power, in the long-time use process of cable, glass fibre is less prone to crackle, so that rainwater be avoided to keep each conductor short
Road, thus the case where avoiding conductor raised electric current burns sheath suddenly.
The present invention is further arranged to: modified flame-retardant polypropylene layer is provided on the outside of the fiberglass insulation.
By using above-mentioned technical proposal, polypropylene is a kind of hemicrystalline thermoplastic, and polypropylene is with higher
Impact resistance and engineering properties are tough, to further improve the mechanical strength of cable, meanwhile, polypropylene has to resist and a variety of have
The ability of solvent and acid and alkali corrosion is further reduced the modified flame-retardant polypropylene layer feelings cracked due to extraneous raindrop erosion
Condition.
The present invention is further arranged to: being provided with crosslinked polyethylene enhancement layer on the outside of the modified flame-retardant polypropylene layer.
By using above-mentioned technical proposal, the density of crosslinked polyethylene is small, when cable is set up over long distances, the self weight of cable
It is small, so that damage of the shearing to cable for the self weight that cable is subject to is reduced, in addition, the high mechanical strength of crosslinked polyethylene, cable
The shearing of self weight is not easy to cause crackle on crosslinked polyethylene surface, in addition, the corrosion resistance of crosslinked polyethylene is high, therefore cable can
To be effectively reduced influence of the external environment to cable.
The present invention is further arranged to: being provided with aramid fiber layer of cloth on the outside of the crosslinked polyethylene enhancement layer.
By using above-mentioned technical proposal, the intensity of aryl fiber cloth is high, deformation is small, and the heat resistance of aryl fiber cloth
Height can not only further enhance the mechanical strength of cable, can also reduce influence of the variation to cable of ambient temperature.
The manufacturing method of the invention discloses a kind of copper core lv power cable with sheathed structure, including following step
It is rapid:
Step 1 successively wraps up fiberglass insulation, modified flame-retardant polypropylene layer, the poly- second of crosslinking outward on the outside of copper core conductor
Alkene enhancement layer and aramid fiber layer of cloth form conductor；
Step 2 takes supporting-core, by parting bead and support bar along the radial development of supporting-core, and smears in parting bead and support bar side
Resin adhesive layer；
Copper core conductor separation is placed on two adjacent parting beads by step 3, and copper core conductor is fitted on supporting-core, by parting bead and
Support bar rotates in the same direction, and is fitted in copper core conductor lateral surface, and support bar is inserted between two copper core conductors, is formed
Inner core；
Step 4, successively wrapping inner layer sheath, aluminium alloy armored layer and outer protective sleeve outside inner core.
By using above-mentioned technical proposal, in whole process, it is only necessary to which package outward layer by layer wraps up in copper core conductor
More closely knit, the structure of entire cable is more secured, and anti-pressure ability is more preferable, and process flow is simple.
In conclusion advantageous effects of the invention are as follows:
1, support copper core conductor on the inside of cable of the invention by supporting-core, outside by support bar by between copper core conductor into
Row, which squeezes, to be fixed, and keeps cable internal structure more closely knit, and compression is not easy to deform, and anti-pressure ability is good, reduces the transversal of cable entirety
Area saves raw material.
2, an entirety is set by supporting-core, parting bead and support bar, enhances the integrality of structure entirety, it can be more preferable
Ground wraps copper core conductor, connects closer.
3, cable processing method manufacturing procedure of the invention is simple, especially connects by copper core conductor and supporting-core and parting bead
When connecing, it is only necessary to which parting bead is unfolded and is rotated, it will be able to copper core conductor is wrapped, is cooperatively connected by resin adhesive layer, energy
It enough avoids parting bead and support bar from rebounding to unclamp, makes the structure more consolidation of entire cable, anti-extrusion ability is higher.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cable of the present invention.
Fig. 2 is the structure expanded view of supporting-core and parting bead in the present invention.
In figure, 1, copper core conductor；10, modified flame-retardant polypropylene layer；11, crosslinked polyethylene enhancement layer；12, aryl fiber cloth
Layer；2, supporting-core；3, parting bead；4, support bar；5, internal layer sheath；6, aluminium alloy armored layer；7, outer protective sleeve；8, resin adhesive layer；
9, fiberglass insulation.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
It is a kind of copper core lv power cable with sheathed structure disclosed by the invention, including inner core referring to Fig.1 with 2
With external protection two-part structure.Wherein, inner core includes the structures such as copper core conductor 1, supporting-core 2, parting bead 3 and support bar 4, outer guarantor
Sheath includes 7 three parts of internal layer sheath 5, aluminium alloy armored layer 6 and outer protective sleeve.
Supporting-core 2 is located at the center of cable, and outer radial is stretched out there are four the parting bead 3 for being in crossing distribution, parting bead 3 with
The side of supporting-core 2 between parting bead 3 is the arc surface being recessed inwardly, and is provided with copper core conductor 1 between adjacent parting bead 3,
Copper core conductor 1 is identical as the quantity of parting bead 3, and is spaced and is arranged with parting bead 3, is fitted on supporting-core 2, four parting beads 3 are along phase
With direction bending, be bonded and on the copper core conductor 1 of its same side, and parting bead 3 is to the other side of copper core conductor 1 and another
Between one copper core conductor 1, support bar 4 is connected to the one end of parting bead 3 far from supporting-core 2, be inserted into two copper core conductors 1 it
Between, for supporting-core 2 in four copper core conductors 1 of medial support, support bar 4 supports four copper core conductors 1 on the outside, and by copper core conductor
1 is completely encapsulated in parting bead.
Supporting-core 2, parting bead 3 and support bar 4 are an integral molding structure, and are made of flame-proof PVC material, the thickness of parting bead 3
Uniformly, the cross section of support bar 4 is triangle, is connect by an apex angle with parting bead 3, three sides are outward opening
Arcwall face can be fitted on copper core conductor 1.In order to enhance the compactness that parting bead 3 and support bar 4 are combined with copper core conductor 1,
Parting bead 3 and support bar are coated with resin adhesive layer 8 on 4 side, keep the two closer with being bonded for copper core conductor 1.
It is enclosed with one layer of inner sheath 5 on the outside of entire inner core, one layer of aluminium alloy armored layer is enclosed with outside internal layer sheath 5
6, one layer of outer protective sleeve 7 is enclosed with outside aluminium alloy armored layer 6, and internal layer sheath 5 and outer protective sleeve 7 are all made of flame-proof PVC material.
The outside of copper core conductor 1 is provided with fiberglass insulation 9, and fiberglass insulation 9 has good insulating properties,
The case where armor 6 charges can be enabled aluminum alloy to avoid the electric current in copper core conductor 1, fiberglass insulation 9 also has good
Mechanical strength, the shearing of copper core conductor 1 is damaged to reduce the self weight of cable.
When 1 long-time of copper core conductor is in overload operation, the high current in copper core conductor 1 makes fiberglass insulation 8
In the condition of high temperature, therefore the case where fiberglass insulation 9 is easy to happen burning, therefore in order to avoid the hair of fiberglass insulation 9
The case where raw burning, therefore the outside of fiberglass insulation 9 is provided with modified flame-retardant polypropylene layer 10.Modified flame-retardant polypropylene
Layer 10 is added fire retardant by polypropylene and is process, and modified flame-retardant polypropylene layer 10 has good anti-flammability, thus modified flame-retardant
The case where polypropylene layer 10 prevents fiberglass insulation 9 to burn, and then reduce and the external protection on the outside of cable is caused to burn
And the situation for causing copper core conductor 1 exposed.
The outside of modified flame-retardant polypropylene layer 10 is provided with crosslinked polyethylene enhancement layer 11, due to the density of crosslinked polyethylene
It is small, thus the self weight of cable is small when cable is set up over long distances, to reduce damage of the shearing to cable for the self weight that cable is subject to
Bad, in addition, the high mechanical strength of crosslinked polyethylene, the shearing of cable self weight is not easy to cause crackle on crosslinked polyethylene surface.
The outside of crosslinked polyethylene enhancement layer 11 is provided with aramid fiber layer of cloth 12.The intensity of aramid fiber layer of cloth 12 is high,
When in 12 deformation range of aramid fiber layer of cloth, deformation when aramid fiber layer of cloth 12 meets with stresses is small, and aryl fiber cloth has
Have the characteristics that heat resistance is high, can not only further enhance the mechanical strength of cable, the variation pair of ambient temperature can also be reduced
The influence of cable.
It is a kind of manufacturer of the copper core lv power cable with sheathed structure disclosed by the invention referring to Fig.1 with 2
Method, comprising the following steps:
Step 1, by more copper wires according to requiring to be wound into a copper core conductor 1, successively wrap up glass outward in 1 outside of copper core conductor
Glass fibrous covering 9, modified flame-retardant polypropylene layer 10, crosslinked polyethylene enhancement layer 11 and aramid fiber layer of cloth 12 form one
Conductor；
Step 2 takes supporting-core 2, by parting bead 3 and support bar 4 along the radial development of supporting-core 2, and in 4 side of parting bead 3 and support bar
Smear resin adhesive layer 8 in face；
1 one end of copper core conductor is aligned by step 3 with one end of supporting-core 2, and four copper core conductors 1 are gradually embedded adjacent two
Between a parting bead 3, copper core conductor 1 is fitted on supporting-core 2, and by supporting-core 2 by rotation counterclockwise, parting bead 3 and support bar 4 are being propped up
The clockwise direction bending of the drive lower edge of support core 2, is fitted in 1 lateral surface of copper core conductor, passes through resin adhesive layer 8 and copper core conductor
1 outermost layer is bonded bonding, then squeezes support bar 4, and support bar 4 is inserted between two copper core conductors 1, jam-packed copper core conductor
1, form inner core；
Step 4, successively wrapping inner layer sheath 5, aluminium alloy armored layer 6 and outer protective sleeve 7 outside inner core, complete the production of cable
Process.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of copper core lv power cable with sheathed structure, it is characterised in that: including internal layer sheath (5), the internal layer
There are multiple copper core conductors (1) in circumferential array inside sheath (5), the middle position setting that multiple copper core conductors (1) surround
Have supporting-core (2), be radially extended with parting bead (3) identical with copper core conductor (1) quantity on the supporting-core (2), it is described every
Item (3) is bonded and surrounds between copper core conductor (1) to the other side and another copper core conductor (1), and in two copper core conductors (1)
Between be provided with support bar (4), is enclosed with aluminium alloy armored layer (6), the aluminium alloy armored layer outside the internal layer sheath (5)
(6) external to be enclosed with outer protective sleeve (7).
2. a kind of copper core lv power cable with sheathed structure according to claim 1, it is characterised in that: the branch
The cross section of stay (4) is triangle, one apex angle is connect with parting bead (3), and three sides are the arcwall face of outward opening.
3. a kind of copper core lv power cable with sheathed structure according to claim 2, it is characterised in that: it is described every
Resin adhesive layer (8) is coated on the side of item (3) and support bar (4).
4. a kind of copper core lv power cable with sheathed structure according to claim 1, it is characterised in that: the copper
Fiberglass insulation (9) are provided on the outside of core conductor (1).
5. a kind of copper core lv power cable with sheathed structure according to claim 4, it is characterised in that: the glass
Modified flame-retardant polypropylene layer (10) are provided on the outside of glass fibrous covering (9).
6. a kind of copper core lv power cable with sheathed structure according to claim 5, it is characterised in that: modified resistance
Crosslinked polyethylene enhancement layer (11) are provided on the outside of combustion polypropylene layer (10).
7. a kind of copper core lv power cable with sheathed structure according to claim 6, it is characterised in that: the friendship
Aramid fiber layer of cloth (12) are provided on the outside of connection polyethylene enhancement layer (11).
8. a kind of manufacturing method of the copper core lv power cable with sheathed structure, which comprises the following steps:
Step 1 successively wraps up fiberglass insulation (9), modified flame-retardant polypropylene layer outward on the outside of copper core conductor (1)
(10), crosslinked polyethylene enhancement layer (11) and aramid fiber layer of cloth (12) form conductor；
Step 2 takes supporting-core (2), by parting bead (3) and support bar (4) along the radial development of supporting-core (2), and in parting bead (3) and
Smear resin adhesive layer (8) in support bar (4) side；
Copper core conductor (1) is spaced apart in two adjacent parting beads (3) by step 3, and copper core conductor (1) is fitted in supporting-core (2)
On, parting bead (3) and support bar (4) are rotated in the same direction, copper core conductor (1) lateral surface, support bar (4) insertion are fitted in
To between two copper core conductors (1), inner core is formed；
Step 4, successively wrapping inner layer sheath (5), aluminium alloy armored layer (6) and outer protective sleeve (7) outside inner core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910002776.XA CN109585084A (en) | 2019-01-02 | 2019-01-02 | A kind of copper core lv power cable and manufacturing method with sheathed structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910002776.XA CN109585084A (en) | 2019-01-02 | 2019-01-02 | A kind of copper core lv power cable and manufacturing method with sheathed structure |
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| CN109585084A true CN109585084A (en) | 2019-04-05 |
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| CN201910002776.XA Pending CN109585084A (en) | 2019-01-02 | 2019-01-02 | A kind of copper core lv power cable and manufacturing method with sheathed structure |
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