CN106298014A - A kind of parallel bunched overhead insulated cable and production technology thereof - Google Patents
A kind of parallel bunched overhead insulated cable and production technology thereof Download PDFInfo
- Publication number
- CN106298014A CN106298014A CN201611015015.0A CN201611015015A CN106298014A CN 106298014 A CN106298014 A CN 106298014A CN 201611015015 A CN201611015015 A CN 201611015015A CN 106298014 A CN106298014 A CN 106298014A
- Authority
- CN
- China
- Prior art keywords
- insulated cable
- conductor
- wire
- overhead insulated
- insulating barrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 35
- 238000004132 cross linking Methods 0.000 claims abstract description 27
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 17
- 239000004917 carbon fiber Substances 0.000 claims abstract description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- 230000004888 barrier function Effects 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- 238000005491 wire drawing Methods 0.000 claims abstract description 7
- 230000005855 radiation Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000006872 improvement Effects 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000009854 Cucurbita moschata Nutrition 0.000 description 1
- 240000001980 Cucurbita pepo Species 0.000 description 1
- 235000009852 Cucurbita pepo Nutrition 0.000 description 1
- 206010014357 Electric shock Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 235000020354 squash Nutrition 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—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
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
-
- 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
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
-
- 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
- H01B7/04—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
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Non-Insulated Conductors (AREA)
Abstract
The present invention relates to a kind of parallel bunched overhead insulated cable and production technology thereof, described parallel bunched overhead insulated cable includes compacted conductor, described compacted conductor is formed by circular carbon fiber wire and the special-shaped hard-drawn aluminum wire that is arranged on circular carbon fiber wire outer wall are stranded, it is provided with insulating barrier on the outer wall of compacted conductor, described insulating barrier connects dowel, beautiful line it is provided with on the upper side of described dowel, the production technology of described parallel bunched overhead insulated cable includes wire drawing, twisted wire, extrusion molding and crosslinking, it is high that the present invention has production efficiency, service life is long, overall low cost, it is easy to the advantage promoted.
Description
Technical field
The invention belongs to cable and wire technical field, be specifically related to a kind of parallel bunched overhead insulated cable and produce work
Skill.
Background technology
Along with the unlatching of the agriculture urban network restructuring of a new round, national grid has rolled up parallel cluster frame in product calls for bid
The bid amount of empty insulated cable, due to parallel bunched overhead insulated cable have that line reactance is little, occupy little space, line construction
Simply, reduce Danger Electric shock risk, set up convenient, overall low cost and other advantages, but currently used a kind of aerial insulated cable, and
The region that long length lays is needed for forest zone, mountain area etc., can not be good for conventional parallel bunched overhead insulated cable
Meet, to this, it is provided that a kind of production efficiency height, length in service life, overall low cost, be easy to popularization parallel cluster overhead insulating
Cable and production technology tool thereof are of great significance.
Summary of the invention
The invention aims to overcome the deficiencies in the prior art, and provide a kind of production efficiency height, length in service life,
Overall low cost, the parallel bunched overhead insulated cable being easy to popularization and production technology tool thereof.
The object of the present invention is achieved like this: a kind of parallel bunched overhead insulated cable, and described parallel cluster is maked somebody a mere figurehead
Insulated cable includes that compacted conductor, described compacted conductor are by circular carbon fiber wire and to be arranged on circular carbon fiber wire outer wall
The stranded composition of special-shaped hard-drawn aluminum wire, the outer wall of compacted conductor is provided with insulating barrier, described insulating barrier connects dowel, institute
Beautiful line it is provided with on the upper side of the dowel stated.
A kind of production technology of parallel bunched overhead insulated cable, the production work of described parallel bunched overhead insulated cable
Skill comprises the steps:
Step 1: wire drawing, utilizes wire drawing machine, and the drawing die after improvement, draws out molded line aluminum according to conductor strand structure
Monofilament；
Step 2: twisted wire, uses carbon fiber wire as the molded line aluminium monofilament obtained in lifting-line and step 1 according to certain structure
Carry out with one heart multiple strand after arrangement and form conductor wire core, and use diamond mould to carry out secondary circle to press；
Step 3: extrusion molding, utilizes the polyethylene material after cross-linking radiation, by extruding machine, conductor wire core is carried out extrusion molding；
Step 4: crosslinking, carries out cross-linking radiation by the conductor wire core with insulating barrier obtained in step 3；Wherein crosslinking time
It is 2 4h.
Described insulating barrier and dowel all use IXPE Insulation Material to make.
Described insulating barrier, dowel and markings are coated on the outer wall of compact conductor by extruding machine one-shot forming.
It is round during line centered by described molded line aluminum, when molded line aluminum is non-central line for " trapezoidal ", " S type " or " Z
Type.
Beneficial effects of the present invention: the present invention is 4 core parallel cluster aerial cables or is 3 core parallel cluster aerial cables,
Have the advantage that 1 in use, tensile strength big, 1. owing to using circular carbon fiber wire, the entirety of cable can be substantially improved
Pull-off force, increases the installing space of cable, meets particular/special requirement and reduce installation cost；2. quality is the most stable, improves product
In the product life-span, use run-in index to produce owing to producing, reduce the dowel impact on insulation junction；Change existing markings absolutely
On edge core, use bulge mark line on dowel, it is possible to ensureing the resistance to electricity uniformity of insulation, the circular carbon fiber wire of employing can
Suitably increase the flexibility of conductor, for using the aerial insulated cable that plsitive mold produces, it is ensured that insulation same
Heart degree, reduces the quality unstability caused by insulation eccentricity；3. temperature resistant grade is high, and current-carrying capacity is big, IXPE material
Normal conductor operating temperature is 105 DEG C, in the case of cross-sectional area of conductor is identical, the current-carrying capacity of conductor can be substantially improved；4. insulate
Resistance is high, and service life is long, and IXPE Insulation Material crosslinking process is to use high-energy ray, during do not have moisture to join
With, it is ensured that the insulating properties of cable；5. production efficiency is high；Cross-linking radiation only needs by high-energy ray, and production efficiency is high, circulation
Hurry up；6. uniformly, stable performance, cross-linking radiation is by high-energy ray, and cross-linking effect is stable, uniform in crosslinking；7. integrated cost is relatively
Low, lay conveniently, the beneficially popularization of product.
Accompanying drawing explanation
Fig. 1 is one of structural representation of a kind of parallel bunched overhead insulated cable of the present invention.
Fig. 2 is the two of the structural representation of a kind of parallel bunched overhead insulated cable of the present invention.
In figure: 1, circular carbon fiber wire 2, abnormity hard-drawn aluminum wire 3, insulating barrier 4, dowel 5, beautiful line.
Detailed description of the invention
The present invention is described further below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Figure 1 or 2, a kind of carbon fiber strengthening core aluminium conductor parallel bunched overhead insulated cable, it includes compacted conductor,
Described compacted conductor is by circular carbon fiber wire 1 and to be arranged on stranded group of special-shaped hard-drawn aluminum wire 2 on circular carbon fiber wire 1 outer wall
Becoming, the outer wall of compacted conductor is provided with insulating barrier 3, described insulating barrier 3 connects dowel 4, described dowel 4 upper
Beautiful line 5 it is provided with on side.
The present invention is 3 cores or 4 core parallel cluster aerial cables, have the advantage that 1 in use, tensile strength big, 1.
Owing to using circular carbon fiber wire, the overall pull-off force of cable can be substantially improved, increase the installing space of cable, meet special wanting
Ask and reduce installation cost；2. quality is the most stable, improves life of product, uses run-in index to produce owing to producing, reduces even
Connect the muscle impact on insulation junction；Change existing markings in insulated wire cores, use bulge mark line on dowel, also
The resistance to electricity uniformity of insulation can be ensured, use circular carbon fiber wire can suitably increase the flexibility of conductor, for using squash type
For the aerial insulated cable that mould produces, it is ensured that the concentricity of insulation, reduce the quality caused by insulation eccentricity unstable
Property；3. temperature resistant grade is high, and current-carrying capacity is big, and IXPE material normal conductor operating temperature is 105 DEG C, in cross-sectional area of conductor phase
In the case of Tong, the current-carrying capacity of conductor can be substantially improved；4. insulation resistance is high, and service life is long, and IXPE insulate
Material crosslinking process be use high-energy ray, during do not have moisture to participate in, it is ensured that the insulating properties of cable；5. production efficiency
High；Cross-linking radiation only needs by high-energy ray, and production efficiency is high, and circulation is fast；6. uniformly, stable performance, cross-linking radiation is in crosslinking
By high-energy ray, cross-linking effect is stable, uniform；7. integrated cost is relatively low, lays conveniently, the beneficially popularization of product.
Embodiment 2
A kind of production technology of parallel bunched overhead insulated cable, the production technology bag of described parallel bunched overhead insulated cable
Include following steps: step 1: wire drawing, utilize wire drawing machine, and the drawing die after improvement, draw according to conductor strand structure
Go out molded line aluminium monofilament；Step 2: twisted wire, uses carbon fiber wire as the molded line aluminium monofilament obtained in lifting-line and step 1 according to one
Carry out with one heart multiple strand after fixed structural arrangement and form conductor wire core, and use diamond mould to carry out secondary circle to press；Step 3:
Extrusion molding, utilizes the polyethylene material after cross-linking radiation, by extruding machine, conductor wire core is carried out extrusion molding；Step 4: crosslinking, by step
The conductor wire core with insulating barrier obtained in 3 carries out cross-linking radiation；Wherein crosslinking time is 2 4h.
The present invention uses the mode of cross-linking radiation to produce, and has the advantage that production efficiency is high；Cross-linking radiation only needs to lead to
Crossing high-energy ray, production efficiency is high, and circulation is fast；Secondly, uniformly, stable performance, cross-linking radiation is by high-energy ray, hands in crosslinking
Connection effect stability, uniformly；Additionally integrated cost is relatively low, lays conveniently, the beneficially popularization of product.
Claims (5)
1. a parallel bunched overhead insulated cable, described parallel bunched overhead insulated cable includes compacted conductor, its feature
It is: described compacted conductor is stranded by circular carbon fiber wire and the special-shaped hard-drawn aluminum wire that is arranged on circular carbon fiber wire outer wall
Composition, the outer wall of compacted conductor is provided with insulating barrier, and described insulating barrier connects dowel, the upside of described dowel
Beautiful line it is provided with on face.
2. the production technology of a parallel bunched overhead insulated cable, it is characterised in that: described parallel cluster overhead insulating electricity
The production technology of cable comprises the steps:
Step 1: wire drawing, utilizes wire drawing machine, and the drawing die after improvement, draws out molded line aluminum according to conductor strand structure
Monofilament；
Step 2: twisted wire, uses carbon fiber wire as the molded line aluminium monofilament obtained in lifting-line and step 1 according to certain structure
Carry out with one heart multiple strand after arrangement and form conductor wire core, and use diamond mould to carry out secondary circle to press；
Step 3: extrusion molding, utilizes the polyethylene material after cross-linking radiation, by extruding machine, conductor wire core is carried out extrusion molding；
Step 4: crosslinking, carries out cross-linking radiation by the conductor wire core with insulating barrier obtained in step 3；Wherein crosslinking time
It is 2 4h.
3. a kind of parallel bunched overhead insulated cable as claimed in claim 1, it is characterised in that: described insulating barrier and connection
Muscle all uses IXPE Insulation Material to make.
4. parallel bunched overhead insulated cable as claimed in claim 1 a kind of, it is characterised in that: described insulating barrier, connection
Muscle and markings are coated on the outer wall of compact conductor by extruding machine one-shot forming.
The production technology of a kind of parallel bunched overhead insulated cable the most as claimed in claim 2, it is characterised in that: described type
It is round during line centered by line aluminum, when molded line aluminum is non-central line for " trapezoidal ", " S type " or " Z-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611015015.0A CN106298014B (en) | 2016-11-18 | 2016-11-18 | A kind of parallel bunched overhead insulated cable and its production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611015015.0A CN106298014B (en) | 2016-11-18 | 2016-11-18 | A kind of parallel bunched overhead insulated cable and its production technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106298014A true CN106298014A (en) | 2017-01-04 |
| CN106298014B CN106298014B (en) | 2018-01-12 |
Family
ID=57721270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611015015.0A Active CN106298014B (en) | 2016-11-18 | 2016-11-18 | A kind of parallel bunched overhead insulated cable and its production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106298014B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036645A (en) * | 2018-08-09 | 2018-12-18 | 远东电缆有限公司 | A kind of wisdom energy type floating on water surface cable |
| CN111292895A (en) * | 2020-04-24 | 2020-06-16 | 昆明昆宝电线电缆制造有限公司 | High-reliability large-span steel wire reinforced core cluster overhead line and processing technology thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB260837A (en) * | 1926-03-03 | 1926-11-11 | Liverpool Electric Cable Compa | Improvements in and relating to insulated electric conductors |
| DE2616167A1 (en) * | 1975-04-22 | 1976-11-04 | Ericsson Telefon Ab L M | Composite overhead LV cable - has longitudinal ridges along external surface of conductors to indicate phases |
| DE2646373A1 (en) * | 1976-10-14 | 1978-04-20 | Reinshagen Kabelwerk Gmbh | Multicore flat insulated cable - has individual cores identified by different numbers of ribs formed in insulation |
| JP2001093350A (en) * | 1999-09-24 | 2001-04-06 | Yazaki Corp | Self-supporting cable |
| US6411761B1 (en) * | 1998-10-28 | 2002-06-25 | Sumitomo Electric Industries, Ltd. | Optical fiber cable |
| CN202650589U (en) * | 2012-06-29 | 2013-01-02 | 人民电缆集团有限公司 | Low-smoke halogen-free cluster lead |
| CN202796104U (en) * | 2012-07-11 | 2013-03-13 | 东莞市永固电业制品有限公司 | Data line capable of emitting light |
| CN105336446A (en) * | 2015-12-02 | 2016-02-17 | 宁夏瑞银有色金属科技有限公司 | Annealing device used for cable wire and annealing method thereof |
| CN205177463U (en) * | 2015-11-03 | 2016-04-20 | 昆明电立电缆有限公司 | Parallel overhead insulated cable tied in a bundle of 10kV |
| CN105788740A (en) * | 2016-04-25 | 2016-07-20 | 莒南县美达电力实业有限公司 | Parallel bunched cable |
| CN105810296A (en) * | 2016-05-04 | 2016-07-27 | 江苏红峰电缆集团有限公司 | 1kv aluminum-core overhead cable |
-
2016
- 2016-11-18 CN CN201611015015.0A patent/CN106298014B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB260837A (en) * | 1926-03-03 | 1926-11-11 | Liverpool Electric Cable Compa | Improvements in and relating to insulated electric conductors |
| DE2616167A1 (en) * | 1975-04-22 | 1976-11-04 | Ericsson Telefon Ab L M | Composite overhead LV cable - has longitudinal ridges along external surface of conductors to indicate phases |
| DE2646373A1 (en) * | 1976-10-14 | 1978-04-20 | Reinshagen Kabelwerk Gmbh | Multicore flat insulated cable - has individual cores identified by different numbers of ribs formed in insulation |
| US6411761B1 (en) * | 1998-10-28 | 2002-06-25 | Sumitomo Electric Industries, Ltd. | Optical fiber cable |
| JP2001093350A (en) * | 1999-09-24 | 2001-04-06 | Yazaki Corp | Self-supporting cable |
| CN202650589U (en) * | 2012-06-29 | 2013-01-02 | 人民电缆集团有限公司 | Low-smoke halogen-free cluster lead |
| CN202796104U (en) * | 2012-07-11 | 2013-03-13 | 东莞市永固电业制品有限公司 | Data line capable of emitting light |
| CN205177463U (en) * | 2015-11-03 | 2016-04-20 | 昆明电立电缆有限公司 | Parallel overhead insulated cable tied in a bundle of 10kV |
| CN105336446A (en) * | 2015-12-02 | 2016-02-17 | 宁夏瑞银有色金属科技有限公司 | Annealing device used for cable wire and annealing method thereof |
| CN105788740A (en) * | 2016-04-25 | 2016-07-20 | 莒南县美达电力实业有限公司 | Parallel bunched cable |
| CN105810296A (en) * | 2016-05-04 | 2016-07-27 | 江苏红峰电缆集团有限公司 | 1kv aluminum-core overhead cable |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036645A (en) * | 2018-08-09 | 2018-12-18 | 远东电缆有限公司 | A kind of wisdom energy type floating on water surface cable |
| CN111292895A (en) * | 2020-04-24 | 2020-06-16 | 昆明昆宝电线电缆制造有限公司 | High-reliability large-span steel wire reinforced core cluster overhead line and processing technology thereof |
| CN111292895B (en) * | 2020-04-24 | 2021-08-03 | 昆明昆宝电线电缆制造有限公司 | High-reliability large-span steel wire reinforced core cluster overhead line and processing technology thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106298014B (en) | 2018-01-12 |
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Denomination of invention: Parallel bundle-assembled overhead insulation cable and production process thereof Effective date of registration: 20181217 Granted publication date: 20180112 Pledgee: China Postal Savings Bank Co., Ltd. Zhumadian Branch Pledgor: Leshan, Henan Cable Co., Ltd Registration number: 2018990001138 |
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Denomination of invention: Parallel bundle-assembled overhead insulation cable and production process thereof Effective date of registration: 20191203 Granted publication date: 20180112 Pledgee: China Postal Savings Bank Co., Ltd. Zhumadian Branch Pledgor: Leshan, Henan Cable Co., Ltd Registration number: Y2019980000840 |
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Date of cancellation: 20210312 Granted publication date: 20180112 Pledgee: China Postal Savings Bank Co.,Ltd. Zhumadian Branch Pledgor: HENAN LESHAN CABLE Co.,Ltd. Registration number: Y2019980000840 |
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Denomination of invention: A parallel bundle overhead insulated cable and its production process Effective date of registration: 20210420 Granted publication date: 20180112 Pledgee: China Postal Savings Bank Co.,Ltd. Zhumadian Branch Pledgor: HENAN LESHAN CABLE Co.,Ltd. Registration number: Y2021980002813 |
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