CN105825949A - Ethylene propylene rubber insulating optical fiber composite power cable and preparation method - Google Patents
Ethylene propylene rubber insulating optical fiber composite power cable and preparation method Download PDFInfo
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- CN105825949A CN105825949A CN201610276005.6A CN201610276005A CN105825949A CN 105825949 A CN105825949 A CN 105825949A CN 201610276005 A CN201610276005 A CN 201610276005A CN 105825949 A CN105825949 A CN 105825949A
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- ethylene propylene
- power cable
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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
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/22—Cables including at least one electrical conductor together with optical fibres
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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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Insulated Conductors (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention discloses an ethylene propylene rubber insulating optical fiber composite power cable and a preparation method. The composite power cable comprises from inside to outside: a water-resistant conductor, a conductor shielding layer, an insulating layer, a first water-blocking tape covering layer, a metal shielding layer, a second water-blocking tape covering layer, a phase splitting inner protection layer, a filling layer, a covering layer, an inner gasket layer, an armor layer, and an outer protection layer. An optical fiber unit and the filling layer are disposed among cabling gaps. The optical fiber unit is composed of an optical fiber, a stainless steel pipe, a polyethylene inner protection layer, a steel wire armor layer and a polyethylene outer protection layer. The composite power cable combines electricity and communication transmission, saves seabed cable laying channel resources, and has the advantages of low cost, and easy operation and running and maintenance. The ethylene propylene rubber has the characteristics of oil resistance, chemical playing resistance, humidity resistance, regional discharging resistance, and excellent bent property, so that the composite power cable is suitable for operation in special and complex seabed environment.
Description
Technical field
The present invention relates to a kind of fiber composite power cable, particularly to 35kV that is a kind of ethylene propylene rubber insulated and that electric energy transmission and optical fiber communication function are combined and the Optical Fiber Composite medium-pressure power cable of following electric pressure, the invention belongs to power cable manufacturing technology field.
Background technology
Ocean has use bad environments, system design is complicated, technology content is high-end, complex manufacturing feature, along with economic development, offshore oil, the construction of natural gas fields will welcome a high-speed developing period, such as the interconnection etc. between land connection drilling platforms or drilling platforms；Sea cable property is required more and more higher by this, and this just requires that sea cable has high moisture-resistance, and heat resistance is good, and structural stability is good, has preferable flexibility under room temperature, allows for less bending radius, is resistant to the corrosion of many chemical solvents.Conventional crosslinked polyetylene insulated sea cable cannot meet the property such as oil resistant and chemically-resistant solvent, and ethylene propylene rubber insulated sea cable is the most crosslinked polyetylene insulated in performances such as oil resistant, resistance to chemical attack, humidity, high temperature impact resistance performance, resistant to partial discharges.
Existing middle pressure ethylene propylene rubber insulation material, only with ethylene propylene diene rubber as base material, the electric property of ethylene propylene diene rubber such as specific insulation, disruptive field intensity, poor, the core resulted at higher voltages or is susceptible to insulation breakdown under short circuit instantaneous high pressure, and base material the most only uses ethylene propylene diene rubber, cause production cost higher.
Summary of the invention
Goal of the invention: the invention aims to solve deficiency of the prior art, a kind of production combining cable and optical cable is provided to control a little, and carry out particular design production according to joint product own characteristic, there is electric power transmission and dual-use function is transmitted in optic communication, save route resource, reduce laid down cost, can effectively meet that rivers,lakes and seas are passed through, marine oil field exploitation, the transmission of the Special complex environmental electric-force such as seabed resources exploration and information are transmitted in the urgent need to ethylene propylene rubber insulated fiber composite power cable.
Technical scheme: the ethylene propylene rubber insulated fiber composite power cable of one of the present invention, including water-blocking conductor, conductor shield, insulating barrier, insulation screen, the first waterstop lapping layer, metal screen layer, second waterstop lapping layer, split-phase sheath, packed layer, belting layer, inner cushion layer, armor, outer jacket and fiber unit；It is outside equipped with conductor shield at water-blocking conductor, it is outside equipped with insulating barrier at conductor shield, it is outside equipped with insulation screen at insulating barrier, it is outside equipped with the first waterstop lapping layer at insulation screen, it is outside equipped with metal screen layer at the first waterstop lapping layer, it is outside equipped with the second waterstop lapping layer at metal screen layer, it is outside equipped with split-phase sheath at the second waterstop lapping layer, fiber unit and packed layer it is provided with in stranding gap, it is outside equipped with belting layer becoming cable core, it is outside equipped with inner cushion layer at belting layer, it is outside equipped with armor at inner cushion layer, it is outside equipped with outer jacket at armor, described fiber unit is by optical fiber, stainless steel tube, polythene inner, steel wire armor layer and outer protective polyethylene layer composition.
Further, described water-blocking conductor uses the annealed copper conductor of metal cladding, and conductor uses and is layered wrapped or vertical bag waterstop, and is wound around water blocking yarn.
Further, described conductor shield uses semiconductive shieldin material to be directly extruded on water-blocking conductor.
Further, described insulating barrier is made up of the material of following parts by weight:
Ethylene propylene diene rubber 15-20 part, ethylene propylene monomer 10-15 part, linear low density polyethylene 4-8 part, paraffin hydrocarbon ils 5-7 part, zinc oxide 6-8 part, paraffin 1-3 part, stearic acid 01-0.5 part, calcinated argil 10-30 part, superfine talcum powder 5-20 part, surfactant gamma-aminopropyl-triethoxy-silane 0.1-0.5 part, age resistor 4, 4 ' double (α, α dimethyl benzyl) diphenylamines 0.5-2 part, vulcanizing agent cumyl peroxide 0.5-5 part, auxiliary curing agent triallyl cyanurate 0.5-1 part, high wear-resistant carbon black 1-3 part, precipitated silica 10-15 part, calcium carbonate 3-5 part, antimony oxide 1-3 part, lead monoxide 1-3 part.
Further, described first waterstop lapping layer uses the two-sided semiconductor waterstop of 0.3mm thickness to be directly coated on insulation screen；Described second waterstop lapping layer uses the two-sided semiconductor waterstop of 0.3mm thickness to be directly coated on metal screen layer.
Further, the band of described belting layer employing 0.3mm thickness is wrapped forms；Described inner cushion layer uses the high-strength polypropylene PP cordage lapping structure of diameter 2 ~ 4mm；Described armor uses galvanized steel bar silk or zinc-coated flat steel sheet silk to be entwined；The polypropylene PP cordage of diameter 2 ~ 4mm that described outer jacket is coated by Colophonium is directly around wrapping on armor.
Further, the preparation technology of described insulating barrier is as follows:
(1) by described ethylene propylene diene rubber, described ethylene propylene monomer, described linear low density polyethylene, antimony oxide, lead monoxide, mixing 5min-6min in 100 DEG C of-120 DEG C of banburies, mixing uniformly；
(2) in described banbury, described zinc oxide, described stearic acid, described superfine talcum powder, high wear-resistant carbon black, precipitated silica, calcium carbonate, mixing 2min-3min are added；
(3) in described banbury, described paraffin hydrocarbon ils, described paraffin, described calcinated argil, described surfactant gamma-aminopropyl-triethoxy-silane, described age resistor 4 are then added, 4 ' double (α, α dimethyl benzyl) diphenylamines, mixing 3min-5min；
(4) in described banbury, it is eventually adding described vulcanizing agent cumyl peroxide 0.5%-1.5%, described auxiliary curing agent triallyl cyanurate 0.3%-1.4%, mixing 0.5min-1.5min, is then discharged out glue stuff compounding；
(5) by the thinnest for described glue stuff compounding logical 1-2 time, pendulum glue 2-3 time, then opens bar slice on tri-roll press machine simultaneously, and the rubber page of output cools down through chill roll, after crossing Pulvis Talci case, i.e. prepares finished product.
Beneficial effect: beneficial effects of the present invention is as follows:
(1) ethylene propylene rubber insulated fiber composite power cable, make electric power and communications " two cable unifications ", save cable laying channel resource, and there is the advantages such as expense is low, operation maintenance is convenient, the features such as ethylene propylene rubber insulated distinctive oil resistivity, chemically-resistant lay, moisture resistance, resistant to partial discharges, bending property are excellent, it is suitable under the environments such as subsea of Special complex running, has led the technological innovation of China's sea work Cable industry.
(2) in pressure ethylene propylene rubber insulation material, ethylene propylene diene rubber, ethylene propylene monomer, linear low density polyethylene constitute base material, wherein ethylene propylene monomer, linear low density polyethylene are cheap, low cost, the electric property of ethylene propylene monomer is also advantageous over ethylene propylene diene rubber, the performance of so comprehensive plurality of raw materials, learns from other's strong points to offset one's weaknesses, reduce cost, improve the purpose of electric property.It is experimentally confirmed, the specific insulation of the middle pressure ethylene propylene rubber insulation material of the present invention reaches 1014 Ω .m, and disruptive field intensity is more than 30KV/mm, has electric property, higher heat aging performance and the physical and mechanical properties of excellence, and preparation technology is simple, workable.
Accompanying drawing explanation
Fig. 1 is the structural representation of cable of the present invention；
Fig. 2 is the fiber unit structural representation in cable of the present invention.
Detailed description of the invention
The ethylene propylene rubber insulated fiber composite power cable of one as depicted in figs. 1 and 2, including water-blocking conductor 1, conductor shield 2, insulating barrier 3, insulation screen 4, the first waterstop lapping layer 5, metal screen layer 6, second waterstop lapping layer 7, split-phase sheath 8, packed layer 9, belting layer 10, inner cushion layer 11, armor 12, outer jacket 13 and fiber unit 14；nullIt is outside equipped with conductor shield 2 at water-blocking conductor 1，It is outside equipped with insulating barrier 3 at conductor shield 2，It is outside equipped with insulation screen 4 at insulating barrier 3，It is outside equipped with the first waterstop lapping layer 5 at insulation screen 4，It is outside equipped with metal screen layer 6 at the first waterstop lapping layer 5，It is outside equipped with the second waterstop lapping layer 7 at metal screen layer 6，It is outside equipped with split-phase sheath 8 at the second waterstop lapping layer 7，Fiber unit 14 and packed layer 9 it is provided with in stranding gap，It is outside equipped with belting layer 10 becoming cable core，It is outside equipped with inner cushion layer 11 at belting layer 10，It is outside equipped with armor 12 at inner cushion layer 11，It is outside equipped with outer jacket 13 at armor 12，Described fiber unit 14 is by optical fiber 15、Stainless steel tube 16、Polythene inner 17、Steel wire armor layer 18 and outer protective polyethylene layer 19 form.
Further, described water-blocking conductor 1 uses the annealed copper conductor of metal cladding, and conductor uses and is layered wrapped or vertical bag waterstop, and is wound around water blocking yarn.
Further, described conductor shield 2 uses semiconductive shieldin material to be directly extruded on water-blocking conductor 1.
Further, described insulating barrier 3 is made up of the material of following parts by weight:
Ethylene propylene diene rubber 15-20 part, ethylene propylene monomer 10-15 part, linear low density polyethylene 4-8 part, paraffin hydrocarbon ils 5-7 part, zinc oxide 6-8 part, paraffin 1-3 part, stearic acid 01-0.5 part, calcinated argil 10-30 part, superfine talcum powder 5-20 part, surfactant gamma-aminopropyl-triethoxy-silane 0.1-0.5 part, age resistor 4, 4 ' double (α, α dimethyl benzyl) diphenylamines 0.5-2 part, vulcanizing agent cumyl peroxide 0.5-5 part, auxiliary curing agent triallyl cyanurate 0.5-1 part, high wear-resistant carbon black 1-3 part, precipitated silica 10-15 part, calcium carbonate 3-5 part, antimony oxide 1-3 part, lead monoxide 1-3 part.
Further, described first waterstop lapping layer 5 uses the two-sided semiconductor waterstop of 0.3mm thickness to be directly coated on insulation screen 4；Described second waterstop lapping layer 7 uses the two-sided semiconductor waterstop of 0.3mm thickness to be directly coated on metal screen layer 6.
Further, described belting layer 10 uses 0.3mm thickness band is wrapped to be formed；Described inner cushion layer 11 uses the high-strength polypropylene PP cordage lapping structure of diameter 2 ~ 4mm；Described armor 12 uses galvanized steel bar silk or zinc-coated flat steel sheet silk to be entwined；The polypropylene PP cordage of diameter 2 ~ 4mm that described outer jacket 13 is coated by Colophonium is directly around wrapping on armor 12.
Further, the preparation technology of described insulating barrier 3 is as follows:
(1) by described ethylene propylene diene rubber, described ethylene propylene monomer, described linear low density polyethylene, antimony oxide, lead monoxide, mixing 5min-6min in 100 DEG C of-120 DEG C of banburies, mixing uniformly；
(2) in described banbury, described zinc oxide, described stearic acid, described superfine talcum powder, high wear-resistant carbon black, precipitated silica, calcium carbonate, mixing 2min-3min are added；
(3) in described banbury, described paraffin hydrocarbon ils, described paraffin, described calcinated argil, described surfactant gamma-aminopropyl-triethoxy-silane, described age resistor 4 are then added, 4 ' double (α, α dimethyl benzyl) diphenylamines, mixing 3min-5min；
(4) in described banbury, it is eventually adding described vulcanizing agent cumyl peroxide 0.5%-1.5%, described auxiliary curing agent triallyl cyanurate 0.3%-1.4%, mixing 0.5min-1.5min, is then discharged out glue stuff compounding；
(5) by the thinnest for described glue stuff compounding logical 1-2 time, pendulum glue 2-3 time, then opens bar slice on tri-roll press machine simultaneously, and the rubber page of output cools down through chill roll, after crossing Pulvis Talci case, i.e. prepares finished product.
The above, it it is only presently preferred embodiments of the present invention, not the present invention is made any pro forma restriction, although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, any those skilled in the art, in the range of without departing from technical solution of the present invention, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is the content without departing from technical solution of the present invention, any simple modification above example made according to the technical spirit of the present invention, equivalent variations and modification, all still fall within the range of technical solution of the present invention.
Claims (7)
1. an ethylene propylene rubber insulated fiber composite power cable, it is characterised in that: include water-blocking conductor (1), conductor shield (2), insulating barrier (3), insulation screen (4), the first waterstop lapping layer (5), metal screen layer (6), second waterstop lapping layer (7), split-phase sheath (8), packed layer (9), belting layer (10), inner cushion layer (11), armor (12), outer jacket (13) and fiber unit (14)；nullIt is outside equipped with conductor shield (2) at water-blocking conductor (1)，It is outside equipped with insulating barrier (3) at conductor shield (2)，It is outside equipped with insulation screen (4) at insulating barrier (3)，It is outside equipped with the first waterstop lapping layer (5) at insulation screen (4)，It is outside equipped with metal screen layer (6) at the first waterstop lapping layer (5)，It is outside equipped with the second waterstop lapping layer (7) at metal screen layer (6)，It is outside equipped with split-phase sheath (8) at the second waterstop lapping layer (7)，Fiber unit (14) and packed layer (9) it is provided with in stranding gap，It is outside equipped with belting layer (10) becoming cable core，It is outside equipped with inner cushion layer (11) at belting layer (10)，It is outside equipped with armor (12) at inner cushion layer (11)，It is outside equipped with outer jacket (13) at armor (12)，Described fiber unit (14) is by optical fiber (15)、Stainless steel tube (16)、Polythene inner (17)、Steel wire armor layer (18) and outer protective polyethylene layer (19) composition.
The ethylene propylene rubber insulated fiber composite power cable of one the most according to claim 1, it is characterised in that: described water-blocking conductor (1) uses the annealed copper conductor of metal cladding, and conductor uses and is layered wrapped or vertical bag waterstop, and is wound around water blocking yarn.
The ethylene propylene rubber insulated fiber composite power cable of one the most according to claim 1, it is characterised in that: described conductor shield (2) uses semiconductive shieldin material to be directly extruded on water-blocking conductor (1).
The ethylene propylene rubber insulated fiber composite power cable of one the most according to claim 1, it is characterised in that: described insulating barrier (3) is made up of the material of following parts by weight:
Ethylene propylene diene rubber 15-20 part, ethylene propylene monomer 10-15 part, linear low density polyethylene 4-8 part, paraffin hydrocarbon ils 5-7 part, zinc oxide 6-8 part, paraffin 1-3 part, stearic acid 01-0.5 part, calcinated argil 10-30 part, superfine talcum powder 5-20 part, surfactant gamma-aminopropyl-triethoxy-silane 0.1-0.5 part, age resistor 4, 4 ' double (α, α dimethyl benzyl) diphenylamines 0.5-2 part, vulcanizing agent cumyl peroxide 0.5-5 part, auxiliary curing agent triallyl cyanurate 0.5-1 part, high wear-resistant carbon black 1-3 part, precipitated silica 10-15 part, calcium carbonate 3-5 part, antimony oxide 1-3 part, lead monoxide 1-3 part.
The ethylene propylene rubber insulated fiber composite power cable of one the most according to claim 1, it is characterised in that: described first waterstop lapping layer (5) uses the two-sided semiconductor waterstop of 0.3mm thickness to be directly coated on insulation screen (4)；Described second waterstop lapping layer (7) uses the two-sided semiconductor waterstop of 0.3mm thickness to be directly coated on metal screen layer (6).
The ethylene propylene rubber insulated fiber composite power cable of one the most according to claim 1, it is characterised in that: the band of described belting layer (10) employing 0.3mm thickness is wrapped to be formed；Described inner cushion layer (11) uses the high-strength polypropylene PP cordage lapping structure of diameter 2 ~ 4mm；Described armor (12) uses galvanized steel bar silk or zinc-coated flat steel sheet silk to be entwined；The polypropylene PP cordage of diameter 2 ~ 4mm that described outer jacket (13) is coated by Colophonium is directly around wrapping on armor (12).
The ethylene propylene rubber insulated fiber composite power cable of one the most according to claim 4, it is characterised in that: the preparation technology of described insulating barrier (3) is as follows:
(1) by described ethylene propylene diene rubber, described ethylene propylene monomer, described linear low density polyethylene, antimony oxide, lead monoxide, mixing 5min-6min in 100 DEG C of-120 DEG C of banburies, mixing uniformly；
(2) in described banbury, described zinc oxide, described stearic acid, described superfine talcum powder, high wear-resistant carbon black, precipitated silica, calcium carbonate, mixing 2min-3min are added；
(3) in described banbury, described paraffin hydrocarbon ils, described paraffin, described calcinated argil, described surfactant gamma-aminopropyl-triethoxy-silane, described age resistor 4 are then added, 4 ' double (α, α dimethyl benzyl) diphenylamines, mixing 3min-5min；
(4) in described banbury, it is eventually adding described vulcanizing agent cumyl peroxide 0.5%-1.5%, described auxiliary curing agent triallyl cyanurate 0.3%-1.4%, mixing 0.5min-1.5min, is then discharged out glue stuff compounding；
(5) by the thinnest for described glue stuff compounding logical 1-2 time, pendulum glue 2-3 time, then opens bar slice on tri-roll press machine simultaneously, and the rubber page of output cools down through chill roll, after crossing Pulvis Talci case, i.e. prepares finished product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610276005.6A CN105825949A (en) | 2016-04-29 | 2016-04-29 | Ethylene propylene rubber insulating optical fiber composite power cable and preparation method |
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| CN201610276005.6A CN105825949A (en) | 2016-04-29 | 2016-04-29 | Ethylene propylene rubber insulating optical fiber composite power cable and preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114864142A (en) * | 2022-06-21 | 2022-08-05 | 远东电缆有限公司 | Self-bearing cable and production process thereof |
| CN117727496A (en) * | 2023-12-21 | 2024-03-19 | 源鑫线缆有限公司 | Silicon rubber insulation special power cable |
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| CN102382377A (en) * | 2011-09-29 | 2012-03-21 | 江苏亨通电力电缆有限公司 | Medium-voltage ethylene propylene rubber insulating material and preparation method thereof |
| CN103483708A (en) * | 2011-09-29 | 2014-01-01 | 江苏亨通电力电缆有限公司 | Low-temperature-resistance flame-retardant rubber cable sheath material |
| CN204537755U (en) * | 2015-04-24 | 2015-08-05 | 中天科技海缆有限公司 | The crosslinked polyetylene insulated optical fiber composite submarine power cable of three core 220kV |
| CN205845541U (en) * | 2016-04-12 | 2016-12-28 | 中天科技海缆有限公司 | A kind of ethylene propylene rubber insulated Optical Fiber Composite of environment-friendly type presses submarine cable |
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2016
- 2016-04-29 CN CN201610276005.6A patent/CN105825949A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102382377A (en) * | 2011-09-29 | 2012-03-21 | 江苏亨通电力电缆有限公司 | Medium-voltage ethylene propylene rubber insulating material and preparation method thereof |
| CN103483708A (en) * | 2011-09-29 | 2014-01-01 | 江苏亨通电力电缆有限公司 | Low-temperature-resistance flame-retardant rubber cable sheath material |
| CN204537755U (en) * | 2015-04-24 | 2015-08-05 | 中天科技海缆有限公司 | The crosslinked polyetylene insulated optical fiber composite submarine power cable of three core 220kV |
| CN205845541U (en) * | 2016-04-12 | 2016-12-28 | 中天科技海缆有限公司 | A kind of ethylene propylene rubber insulated Optical Fiber Composite of environment-friendly type presses submarine cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114864142A (en) * | 2022-06-21 | 2022-08-05 | 远东电缆有限公司 | Self-bearing cable and production process thereof |
| CN117727496A (en) * | 2023-12-21 | 2024-03-19 | 源鑫线缆有限公司 | Silicon rubber insulation special power cable |
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Application publication date: 20160803 |