CN105070389B - Power transmission cable with self feed back fault location function - Google Patents
Power transmission cable with self feed back fault location function Download PDFInfo
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- CN105070389B CN105070389B CN201510490577.XA CN201510490577A CN105070389B CN 105070389 B CN105070389 B CN 105070389B CN 201510490577 A CN201510490577 A CN 201510490577A CN 105070389 B CN105070389 B CN 105070389B
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- power transmission
- transmission cable
- conductor
- feed back
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 26
- 239000004020 conductor Substances 0.000 claims abstract description 33
- 239000003063 flame retardant Substances 0.000 claims abstract description 20
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000004888 barrier function Effects 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims abstract description 12
- 239000007943 implant Substances 0.000 claims abstract description 10
- -1 armor Substances 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 claims description 12
- 239000005030 aluminium foil Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229920001903 high density polyethylene Polymers 0.000 claims description 8
- 239000004700 high-density polyethylene Substances 0.000 claims description 8
- 239000003381 stabilizer Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- OUBMGJOQLXMSNT-UHFFFAOYSA-N N-isopropyl-N'-phenyl-p-phenylenediamine Chemical compound C1=CC(NC(C)C)=CC=C1NC1=CC=CC=C1 OUBMGJOQLXMSNT-UHFFFAOYSA-N 0.000 claims description 4
- 239000005662 Paraffin oil Substances 0.000 claims description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 4
- XMFOQHDPRMAJNU-UHFFFAOYSA-N lead(ii,iv) oxide Chemical compound O1[Pb]O[Pb]11O[Pb]O1 XMFOQHDPRMAJNU-UHFFFAOYSA-N 0.000 claims description 4
- 229920001684 low density polyethylene Polymers 0.000 claims description 4
- 239000004702 low-density polyethylene Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 3
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 53
- 230000005611 electricity Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 4
- 239000011229 interlayer Substances 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- Communication Cables (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention discloses a kind of power transmission cable with self feed back fault location function, belong to power transmission cable field, for power transmission cable fault fast positioning, it includes conductor, also include feedback line, support frame, flame-retardant layer, armor, water blocking layer, the outer surface of wherein said conductor is coated with insulating barrier, insulating barrier is coated with screen layer, described support frame includes cavity, supports support and arc frame, described feedback line is arranged in cavity, and conductor is in the adjacent implant supported between support；Described cavity is provided with cushion with the shielding interlayer of conductor outer layer；Described flame-retardant layer is arranged on outside the arc frame of support frame, is provided with armor in the outside of flame-retardant layer, and the outside of armor is provided with water blocking layer.In view of technique scheme, the present invention is capable of when cable bad, timely feedback, in order to the cable damaged is replaced or keeps in repair by workmen, reduces the loss causing residential electricity consumption on the way and business electrical.
Description
Technical field
The invention belongs to power transmission cable field, specifically, particularly relate to a kind of transmission of electricity electricity with self feed back fault location function
Cable.
Background technology
In the laying of transmission line of electricity, generally require and use power transmission cable, but be as socioeconomic fast development, transmission of electricity electricity
Cable is gradually changed by the direction maked somebody a mere figurehead to provided underground, and some nonstandard construction behaviors are often in Process of Urban Development
The cable being in underground state can be caused to be dug disconnected or damage, and if reporting that not only resulting in residential electricity consumption on the way not in time is stranded
Difficulty, also results in the pause of plant produced, causes unnecessary economic loss.
Summary of the invention
It is an object of the invention to provide a kind of power transmission cable with self feed back fault location function, it is capable of when transmission of electricity electricity
When cable is destroyed, in time situation is fed back to power department control room, in order to the cable damaged is replaced or is keeped in repair, subtracts
Few loss that residential electricity consumption on the way and business electrical are caused.
For reaching above-mentioned purpose, the present invention is achieved by the following technical solutions:
The heretofore described power transmission cable with self feed back fault location function, including conductor, optical fiber modulating device, feedback
Controller, described optical fiber modulating device and feedback controller are positioned at cable two ends interface position, also include feedback line, support rib
Frame, flame-retardant layer, armor, water blocking layer, the outer surface of wherein said conductor is coated with insulating barrier, insulating barrier is coated with shielding
Layer, described support frame includes cavity, supports support and arc frame, and described feedback line is arranged in cavity, conductor position
In the adjacent implant supported between support；Described cavity is provided with cushion with the shielding interlayer of conductor outer layer；Described resistance
Combustion layer is arranged on outside the arc frame of support frame, is provided with armor in the outside of flame-retardant layer, and the outside of armor is provided with water blocking layer.
Saying further, having rectangular channel in heretofore described flame-retardant layer, described rectangular channel is embedded with pressure transducer.
Saying further, heretofore described feedback line includes fibre circuit, pressure sensing circuit, feedback line, described
Pressure transducer and pressure sensing connection, fibre circuit is connected with optical fiber modulating device, and feedback line is with feedback controller even
Connect.
Saying further, heretofore described implant is made up of the composition of following weight portion: high density polyethylene (HDPE) 25～35 parts,
Low Density Polyethylene 15～2 parts, vulcanizing agent 3～4 parts, age resistor 2～4 parts, paraffin oil 10～15 parts, silicon dioxide 3～4 parts,
Pulvis Talci 1～2 parts, stabilizer 2～5 parts.
Saying further, heretofore described age resistor uses antioxidant 4010NA, and described stabilizer uses lead orthoplumbate.
Saying further, heretofore described conductor is made up of steel wire wire and aluminum conductor, and aluminum conductor is twisted in steel wire wire.
Saying further, heretofore described armor includes zinc-coated wire, polypropylene rope, Colophonium, wherein zinc-coated wire with
Polypropylene rope is woven into network structure, network structure is coated with Colophonium and constitutes integument.
Saying further, heretofore described screen layer includes inner liner, copper wire layer and aluminium foil layer, and described aluminium foil layer is arranged at
Between copper wire layer and inner liner, inner liner is between aluminium foil layer and insulating barrier, and described inner liner uses crosslinked polyethylene band.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is by built-in fibre circuit, pressure sensing circuit and feedback line, it is possible to accurately and timely that cable status is anti-
It is fed to Electric control department, after power transmission cable is destroyed by external force or causes damage because of self structure reason, it is possible in time
Determining damage position, reduce malfunction elimination required time, precise and high efficiency completes fault restoration quickly, reduces transmission line of electricity edge
Resident and factory's electricity consumption cause on the way impact and loss.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
In figure: 1, water blocking layer；2, armor；3, flame-retardant layer；4, rectangular channel；5, arc frame；6, screen layer；7, exhausted
Edge layer；8, conductor；9, support is supported；10, cushion；11, fibre circuit；12, pressure sensing circuit；13, feedback
Circuit；14, cavity；15, implant.
Detailed description of the invention
Below in conjunction with the accompanying drawings and technical scheme described herein is described further by embodiment.
Embodiment 1: a kind of power transmission cable with self feed back fault location function, including conductor 8, optical fiber modulating device, feedback
Controller, described optical fiber modulating device and feedback controller are positioned at cable two ends interface position, also include feedback line, support rib
Frame, flame-retardant layer 3, armor 2, water blocking layer 1, the outer surface of wherein said conductor 8 is coated with outside insulating barrier 7, insulating barrier 7
Being coated with screen layer 6, described support frame includes cavity 14, supports support 9 and arc frame 5, and described feedback line is arranged
In cavity 14, conductor 8 is in the adjacent implant 15 supported between support 9；Described cavity 14 and conductor 8
It is provided with cushion 10 between the screen layer 6 of outer layer；Described flame-retardant layer 3 is arranged on outside the arc frame 5 of support frame, at flame-retardant layer
The outside of 3 is provided with armor 2, and the outside of armor 2 is provided with water blocking layer 1.
Embodiment 2: a kind of power transmission cable with self feed back fault location function, including conductor 8, optical fiber modulating device, feedback
Controller, described optical fiber modulating device and feedback controller are positioned at cable two ends interface position, also include feedback line, support rib
Frame, flame-retardant layer 3, armor 2, water blocking layer 1, the outer surface of wherein said conductor 8 is coated with outside insulating barrier 7, insulating barrier 7
Being coated with screen layer 6, described support frame includes cavity 14, supports support 9 and arc frame 5, and described feedback line is arranged
In cavity 14, conductor 8 is in the adjacent implant 15 supported between support 9；Described cavity 14 and conductor 8
It is provided with cushion 10 between the screen layer 6 of outer layer；Described flame-retardant layer 3 is arranged on outside the arc frame 5 of support frame, at flame-retardant layer
The outside of 3 is provided with armor 2, and the outside of armor 2 is provided with water blocking layer 1.Rectangular channel 4 is had in described flame-retardant layer 3, described
Rectangular channel 4 is embedded with pressure transducer.Described feedback line includes fibre circuit 11, pressure sensing circuit 12, feedback line
13, described pressure transducer is connected with pressure sensing circuit 12, and fibre circuit 11 is connected with optical fiber modulating device, feedback line
13 are connected with feedback controller.
Embodiment 3:: described implant 15 is made up of the composition of following weight portion: high density polyethylene (HDPE) 25～35 parts, low-density
Polyethylene 15～2 parts, vulcanizing agent 3～4 parts, age resistor 2～4 parts, paraffin oil 10～15 parts, silicon dioxide 3～4 parts, Talcum
Powder 1～2 parts, stabilizer 2～5 parts.Described age resistor uses antioxidant 4010NA, and described stabilizer uses lead orthoplumbate.
Described conductor 8 is made up of steel wire wire and aluminum conductor, and aluminum conductor is twisted in steel wire wire.Described armor 2 include zinc-coated wire,
Polypropylene rope, Colophonium, wherein zinc-coated wire and polypropylene rope are woven into network structure, network structure is coated with Colophonium and constitutes bag
Covering layer.Described screen layer 6 includes inner liner, copper wire layer and aluminium foil layer, and described aluminium foil layer is arranged between copper wire layer and inner liner,
Inner liner is between aluminium foil layer and insulating barrier 7, and described inner liner uses crosslinked polyethylene band.The structure of remainder and enforcement
Example 2 is identical.
Heretofore described fibre circuit 11 is connected with the optical fiber modulating device being positioned at cable interface position, pressure sensing circuit
12, feedback line 13 is connected with the feedback controller being positioned at cable interface position, and these are positioned at the signal processing of cable interface position
Device is all capable of the amplification of signal and filtering of signal noise, it is achieved the uninterrupted transmission to cable signal.And each signal
Processing means is equipped with ad-hoc location coding, when cable breaks down, fibre circuit 11, pressure sensing circuit 12, feedback line
The circuit of least one set must be had in road 13 not feed back to signal, and the signal processing apparatus being so positioned at cable interface position can be by this
A little signals not returned process in time, and are sent in electric control system by ad-hoc location coding, and electric control system is adjusted in time
Join personnel and carry out the inspection of the scene of a crime, and process in time.
The rectangular channel 4 being positioned at flame-retardant layer 3 is embedded with pressure transducer, and pressure transducer can monitor cable local environment in real time
Force value, if unstable situation occurs in force value, the letter of cable interface position will be fed back to by pressure sensing circuit
In number processing means, if these signals can be encoded together with ad-hoc location by feedback signal beyond normal range, signal processing apparatus
Together feed back to electric control system.
Heretofore described fiber optic cables are in addition to can realizing the monitoring of cable status, it is also possible to realize adjacent power supply department it
Between communication interconnect, by cable lay come the multi-faceted connection realizing power supply department.
Heretofore described support frame is except realizing fibre circuit 11, pressure sensing circuit 12, the guarantor of feedback line 13
Outside protecting, it is also possible to isolate the interference between these communication lines and conductor 8, for preventing electromagnetic wave that conductor 8 produces to communication
The interference of circuit, is additionally provided with the screen producing electromagnetic signal for shielded conductor 8 in addition to being provided with insulating barrier 7 in the periphery of conductor 8
Cover layer 6.In the present invention, support frame uses in the cable and point is spaced, can be according to cable type reasonable layout during production
The quantity of support frame and interval, it is ensured that the normal work of communicating circuit in skeleton, also can guarantee that the bearing capacity that cable is enough.
Implant 15 is made up of the composition of following weight portion: high density polyethylene (HDPE) 25～35 parts, Low Density Polyethylene 15～2 parts,
Vulcanizing agent 3～4 parts, age resistor 2～4 parts, paraffin oil 10～15 parts, silicon dioxide 3～4 parts, Pulvis Talci 1～2 parts, stabilizer
2～5 parts.Described age resistor uses antioxidant 4010NA, and described stabilizer uses lead orthoplumbate composition, and this can fill out in guarantee
On the premise of filling thing insulating properties, it is achieved implant is for resistance insulation rate, high temperature resistant, resistance to water and the requirement of anti-flammability, real
The lifting of existing cable life.
Material used in heretofore described water blocking layer 1, armor 2, flame-retardant layer 3, is in existing cable design used
Material, it should be noted however that cable required in the present invention must include these Rotating fields, but not merely
It is limited to described Rotating fields to realize the cable applications of some particular location, so as material of the prior art, in the present invention
The material type used by these Rotating fields can't be related to.
Claims (8)
1. with a power transmission cable for self feed back fault location function, including conductor (8), optical fiber modulating device, feedback control
Device, described optical fiber modulating device and feedback controller are positioned at either interface position, cable two ends, it is characterised in that: also include feedback
Circuit, support frame, flame-retardant layer (3), armor (2), water blocking layer (1), the outer surface cladding of wherein said conductor (8)
Having insulating barrier (7), insulating barrier (7) to be coated with screen layer (6), described support frame includes cavity (14), supports and prop up
Frame (9) and arc frame (5), described feedback line is arranged in cavity (14), and conductor (8) is positioned at adjacent support and props up
In implant (15) between frame (9)；Cushion (10) it is provided with between described cavity (14) and screen layer (6)；Described
Flame-retardant layer (3) is arranged on arc frame (5) outside of support frame, is provided with armor (2), armour in the outside of flame-retardant layer (3)
The outside of dress layer (2) is provided with water blocking layer (1).
Power transmission cable with self feed back fault location function the most according to claim 1, it is characterised in that: described fire-retardant
Having rectangular channel (4) in layer (3), described rectangular channel (4) is embedded with pressure transducer.
Power transmission cable with self feed back fault location function the most according to claim 2, it is characterised in that: described feedback
Circuit includes fibre circuit (11), pressure sensing circuit (12), feedback line (13), described pressure transducer and pressure sensing
Circuit (12) connects, and fibre circuit (11) is connected with optical fiber modulating device, and feedback line (13) is connected with feedback controller.
Power transmission cable with self feed back fault location function the most according to claim 3, it is characterised in that: described filling
Thing (15) is made up of the composition of following weight portion: high density polyethylene (HDPE) 25～35 parts, Low Density Polyethylene 15～2 parts, vulcanizing agent
3～4 parts, age resistor 2～4 parts, paraffin oil 10～15 parts, silicon dioxide 3～4 parts, Pulvis Talci 1～2 parts, stabilizer 2～5 parts.
Power transmission cable with self feed back fault location function the most according to claim 4, it is characterised in that: described anti-old
Agent uses antioxidant 4010NA, and described stabilizer uses lead orthoplumbate.
Power transmission cable with self feed back fault location function the most according to claim 5, it is characterised in that: described conductor
(8) being made up of steel wire wire and aluminum conductor, aluminum conductor is twisted in steel wire wire.
Power transmission cable with self feed back fault location function the most according to claim 6, it is characterised in that: described armouring
Layer (2) includes zinc-coated wire, polypropylene rope, Colophonium, and wherein zinc-coated wire and polypropylene rope are woven into network structure, netted knot
It is coated with Colophonium on structure and constitutes integument.
Power transmission cable with self feed back fault location function the most according to claim 7, it is characterised in that: described shielding
Layer (6) includes inner liner, copper wire layer and aluminium foil layer, and described aluminium foil layer is arranged between copper wire layer and inner liner, and inner liner is positioned at
Between aluminium foil layer and insulating barrier (7), described inner liner uses crosslinked polyethylene band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510490577.XA CN105070389B (en) | 2015-08-12 | 2015-08-12 | Power transmission cable with self feed back fault location function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510490577.XA CN105070389B (en) | 2015-08-12 | 2015-08-12 | Power transmission cable with self feed back fault location function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105070389A CN105070389A (en) | 2015-11-18 |
| CN105070389B true CN105070389B (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510490577.XA Expired - Fee Related CN105070389B (en) | 2015-08-12 | 2015-08-12 | Power transmission cable with self feed back fault location function |
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| CN (1) | CN105070389B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298044B (en) * | 2016-10-14 | 2018-08-10 | 张家港市新邦电力科技有限公司 | A kind of reinforced copper Baogang signal cable |
| CN106653198A (en) * | 2016-12-09 | 2017-05-10 | 晋源电气集团股份有限公司 | High-connectivity power cable |
| CN108109736A (en) * | 2018-01-08 | 2018-06-01 | 温州包鹿新材料有限公司 | A kind of flame-proof environmental protection formula cable |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05274927A (en) * | 1992-03-27 | 1993-10-22 | Sumitomo Electric Ind Ltd | Power cable having built-in optical fiber |
| CN202134228U (en) * | 2011-06-01 | 2012-02-01 | 江苏亨通线缆科技有限公司 | Skeleton type composite cable |
| CN104123985A (en) * | 2014-04-02 | 2014-10-29 | 安徽复兴电缆集团有限公司 | Extruding-resistant and bending-resistant complex cable |
| CN203966600U (en) * | 2014-07-01 | 2014-11-26 | 安徽太平洋电缆股份有限公司 | Anti-tampering waterproof tensile mine soft cable |
| CN204155636U (en) * | 2014-11-06 | 2015-02-11 | 浙江秦山电缆有限公司 | Constitutionally stable cable |
| CN104575808A (en) * | 2014-12-29 | 2015-04-29 | 上海南大集团有限公司 | Intelligent maintenance-free cable |
| CN104751997A (en) * | 2013-12-25 | 2015-07-01 | 江苏亨通线缆科技有限公司 | Marine high-frequency data transmission cable |
-
2015
- 2015-08-12 CN CN201510490577.XA patent/CN105070389B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05274927A (en) * | 1992-03-27 | 1993-10-22 | Sumitomo Electric Ind Ltd | Power cable having built-in optical fiber |
| CN202134228U (en) * | 2011-06-01 | 2012-02-01 | 江苏亨通线缆科技有限公司 | Skeleton type composite cable |
| CN104751997A (en) * | 2013-12-25 | 2015-07-01 | 江苏亨通线缆科技有限公司 | Marine high-frequency data transmission cable |
| CN104123985A (en) * | 2014-04-02 | 2014-10-29 | 安徽复兴电缆集团有限公司 | Extruding-resistant and bending-resistant complex cable |
| CN203966600U (en) * | 2014-07-01 | 2014-11-26 | 安徽太平洋电缆股份有限公司 | Anti-tampering waterproof tensile mine soft cable |
| CN204155636U (en) * | 2014-11-06 | 2015-02-11 | 浙江秦山电缆有限公司 | Constitutionally stable cable |
| CN104575808A (en) * | 2014-12-29 | 2015-04-29 | 上海南大集团有限公司 | Intelligent maintenance-free cable |
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| CN105070389A (en) | 2015-11-18 |
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