CN203134448U - Submarine cable with increased current-carrying capacity - Google Patents
Submarine cable with increased current-carrying capacity Download PDFInfo
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- CN203134448U CN203134448U CN 201220686403 CN201220686403U CN203134448U CN 203134448 U CN203134448 U CN 203134448U CN 201220686403 CN201220686403 CN 201220686403 CN 201220686403 U CN201220686403 U CN 201220686403U CN 203134448 U CN203134448 U CN 203134448U
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Abstract
The utility model relates to a submarine cable with increased current-carrying capacity. A plurality of highly conductive soft annealed copper wires are closely arranged on the periphery of a tin-coated helix copper tube to form a conductor layer, and a carbon paper conductor shield layer, an oil-filled high voltage cable paper insulation layer, a carbon paper insulation shield layer, a copper belt insulation shield and a seamless lead alloy sheath are sequentially clad on the periphery of the conductor layer. The seamless lead alloy sheath is uniformly coated with asphalt and clad sequentially by a self-adhesive polyethylene band inner pad layer, a double-stainless-steel-belt reinforcing layer, a self-adhesive polyethylene band outer pad layer, a non-woven backing layer, a high-density polyethylene anticorrosive coating, an armored inner pad layer made by concentrically twisting of polypropylene ropes and soaked hemp ropes spaced at intervals, an armored layer made by concentrically twisting of aluminum magnesium alloy wires and copper alloy wires spaced at intervals and an outer sheath. The cable is greater in current-carrying capacity, excellent in waterproof performance, sea-water-corrosion resistance, external hydraulic pressure resistance, voltage thermal shock resistance and resistant to bending tension, long in service lifetime and high in reliability.
Description
Technical field
The utility model relates to a kind of power cable, particularly a kind of submarine cable that increases ampacity.
Background technology
Development and use along with marine energy, submarine cable as seabed electric energy transmission current-carrying equipment uses more and more, specification requirement is also more and more higher, especially require cable machinery physical property and electric property excellence, water-impervious, seawater corrosion resistance, anti-external water pressure, proof voltage thermal shock and strain insulator power bending property with bigger ampacity, excellence, long service life, the reliability height.Submarine cable more concern of the prior art seawater corrosion resistance, tension drag mechanical performance and water-impervious performance, and ignored the requirement that cable is had bigger ampacity.
Publication number is that the Chinese utility model patent of CN 201130552Y discloses a kind of submarine cable, it is provided with conductor, insulating barrier, resilient coating, plumbous cover, inner covering, armour and serving from inside to outside, between lead cover and inner covering, be provided with the semiconductive polyethylene anticorrosive coating, the induced potential that makes lead put generation is directly eliminated by semiconductive polyethylene anticorrosive coating ground connection, and does not need to destroy inner covering.The construction of cable of its announcement is simple, convenient processing and manufacture, but this structural cable ampacity is lower, and strain insulator power is crooked and tension to drag mechanical performance general, especially the anti-seawater corrosion performance of aluminum-alloy wire is very poor in the armour, thereby causes to decline to a great extent the useful life of cable.
Publication number is that the Chinese utility model patent of CN 101807453A discloses a kind of power cable for the seabed; comprise the core, screen, insulating barrier, semiconductive water-blocking buffer layer, plumbous cover and semiconductive polyethylene inner cushion layer, insulator screen and sheath, armouring inner cushion layer, armour and the armouring external protection that arrange from inside to outside; core is made up of steel wire and lead and aluminum conductor; armour is made up of galvanized steel wire rope, is being provided with between galvanized steel wire rope every the magnetic aluminum-alloy wire.This utility model provides a kind of low cost of manufacture, tensile strength to reach the qualified sea electric power cable of electric conductivity greatly.But it adopts steel aluminium composite twisted wire as conductor, adopt zinc-coated wire and aluminum-alloy wire as armour, because of the anti-seawater corrosion performance of aluminium relatively poor, permanent use can cause aluminum steel weakened useful life by corrosion, bring the use potential safety hazard, will no longer have separated magnetic effect after especially the corrosion of the aluminum-alloy wire in the armouring is worn out, this moment, wire armoring produced eddy current loss at single-core cable, cause the cable current capacity to descend, do not reach the ampacity of desired design.
The utility model content
The purpose of this utility model is, overcome problems of the prior art, a kind of submarine cable that increases ampacity is provided, water-impervious, seawater corrosion resistance, anti-external water pressure, proof voltage thermal shock and strain insulator power bending property with bigger ampacity, excellence, long service life, the reliability height.
For realizing above purpose, a kind of submarine cable that increases ampacity provided by the utility model, the inner chamber of tin-coated copper helix tube is provided with the hollow oil duct, the periphery of described tin-coated copper helix tube closely is arranged with many high conduction annealed copper lines and constitutes conductor layer, the periphery of described conductor layer evenly is surrounded with the carbon black paper conductor shield, the periphery of described carbon black paper conductor shield evenly is surrounded with oil-filled high-tension cable paper insulation layer, the periphery of described oil-filled high-tension cable paper insulation layer is surrounded with the carbon black paper insulation screen, the periphery of described carbon black paper insulation screen is surrounded with the copper strips insulation screen, the periphery of described copper strips insulation screen coats and has or not the seam lead alloy sheath, the periphery of described no seam lead alloy sheath evenly is coated with pitch and is surrounded with tack polyethylene band inner cushion layer, the periphery of described tack polyethylene band inner cushion layer is coated with double-layer stainless steel band reinforced layer, the periphery of described double-layer stainless steel band reinforced layer is surrounded with the outer bed course of tack polyethylene band, the periphery of the outer bed course of described tack polyethylene band is surrounded with the nonwoven interlining bed course, the periphery of described nonwoven interlining bed course is extruded with the high density polyethylene (HDPE) anticorrosive coat, the periphery of described high density polyethylene (HDPE) anticorrosive coat is coated with by polypropylene rope evenly floods the armouring inner cushion layer that rope made of hemp concentric stranding forms at interval, the periphery of described armouring inner cushion layer evenly is coated with pitch and is coated with by the armour that magnesium alloy steel wire and copper alloy silk are at interval even and concentric stranding forms of aluminizing, the periphery of described armour is coated with by polypropylene rope evenly floods the outer jacket that rope made of hemp concentric stranding forms at interval, and the periphery of outer jacket evenly is coated with pitch.
With respect to prior art, the utility model has been obtained following beneficial effect: the tin-coated copper helix tube has higher elasticity and conformality, can guarantee to satisfy the fuel feeding of big length cables, when cable temperature raises, light viscosity oil impregnating agent expanded by heating, the impregnating agent that comes out that expands flows in the dipping ancillary equipment, when cable temperature descends through the hollow oil duct, impregnating agent shrinks, and the impregnating agent in the dipping ancillary equipment floods additional through the hollow oil duct to oil-filled high-tension cable paper insulation layer; Avoid the air gap in the insulating barrier to produce by the oil duct dipping, and prevent from forming too high pressure in the cable, thereby can improve cable operating temperature greatly, increase current-carrying capacity of cable.Conductor layer is arranged in the periphery of tin-coated copper helix tube, and surface area is big, because the kelvin effect of electric current, ampacity is big, and power consumption penalty is little, and the conductive surface electric current distribution is even, and circuit is reliable.The carbon black paper conductor shield has the semiconductive performance, can eliminate the air gap that forms between cable conductor monofilament surface and the oil-filled high-tension cable paper insulation layer, well contact with the conductor equipotential and with insulating barrier, thereby avoid between conductor and insulating barrier, partial discharge taking place.Oil-filled high-tension cable paper insulation layer can make cable operating temperature improve by the impregnating agent that replenishes in the impregnating equipment, and ampacity increases.The carbon black paper insulation screen has the semiconductive performance, can eliminate the air gap that forms between cable insulation laminar surface and the sheath, well contacts with the sheath equipotential and with insulating barrier, thereby avoids between insulation and sheath partial discharge taking place.The copper strips insulation screen passes through capacitance current when cable normally moves; When system is short-circuited, as the passage of short circuit current, also play the effect of electric field shielding simultaneously.No seam lead alloy sheath both can be used as earthing conductor hop short circuit current, also can be used as waterproof sheath assurance cable core conductor simultaneously and avoided the wet invasion and attack of moisture water, and the pitch of coating can improve sea water corrosion resistant.Tack polyethylene band inner cushion layer can buffer double stainless steel band reinforced layer to the compressing of lead alloy sheath, form the flexibility contact between sheath and the reinforced layer.Double-layer stainless steel band reinforced layer can bear the oil pressure from cable inside on the one hand, and another side can bear the hydraulic pressure from the cable outside, simultaneously lead alloy sheath is played protective action, protects plumbous gold to close the water-tight performance of sheath.The outer bed course of tack polyethylene band and nonwoven interlining bed course can well be combined as a whole interior external member, and prevent that the inside double-layer stainless steel band reinforced layer from existing the edge projection to stab anticorrosive coat, and even reduce the intensity of outside anticorrosive coat.The magnesium alloy steel wire of aluminizing can well strengthen the mechanical resistance tensile strength, and the protection cable is not mechanically damaged, and has excellent anti-seawater corrosion performance; The copper alloy silk both can be every magnetic, and the loss of avoiding the eddy current magnetic hysteresis to cause increases ampacity, and mechanical strength is bigger than copper again, and cost is then cheap than copper, and have excellent anti-seawater corrosion performance, benefits for the long-term security operation of cable.Polypropylene rope floods rope made of hemp coating pitch at interval can improve sea water corrosion resistant greatly as outer jacket.
As preferred version of the present utility model, the aperture of described hollow oil duct is 18mm; The thickness of oil-filled high-tension cable paper insulation layer is 10 ± 0.1mm.
As preferred version of the present utility model, the filament diameter of described high conduction annealed copper line is 2.57 ± 0.03mm, and circular array spiral successively closely is arranged in the periphery of tin-coated copper helix tube.
As preferred version of the present utility model, the thickness of described carbon black paper conductor shield and carbon black paper insulation screen is respectively 0.5 ± 0.02mm, all adopt the eclipsed form mode to twine, and the winding direction of carbon black paper conductor shield and carbon black paper insulation screen is opposite.
As preferred version of the present utility model, the copper strips thickness of described copper strips insulation screen is 0.1 ± 0.01 mm, adopts the eclipsed form mode to twine.
As preferred version of the present utility model, the thickness of described no seam lead alloy sheath is 4.0 ~ 4.3mm, and the weight content in the no seam lead alloy sheath is plumbous: tin: antimony=100:(0.35 ~ 0.45): (0.15 ~ 0.25).This no seam lead alloy sheath sealing is intact, both can be used as earthing conductor hop short circuit current, also can be used as waterproof sheath assurance cable core conductor simultaneously and avoids the wet invasion and attack of moisture water.
As preferred version of the present utility model, the thickness of the outer bed course of described tack polyethylene band inner cushion layer and tack polyethylene band is 0.75 ~ 0.80mm; The thickness of described nonwoven interlining bed course is 0.15 ~ 0.20mm.
As preferred version of the present utility model, the nominal thickness of described high density polyethylene (HDPE) anticorrosive coat is 3.5mm, minimum thickness is not less than 90% of nominal thickness, and maximum ga(u)ge is not more than 110% of nominal thickness, and the diameter deviation that arbitrary vertical cross-section records is no more than 15%.
As preferred version of the present utility model, the nominal diameter of polypropylene rope and the dipping rope made of hemp is respectively 2.5mm in described armouring inner cushion layer and the outer jacket, and the direction of lay of armouring inner cushion layer and outer jacket is opposite.
As preferred version of the present utility model, the filament diameter of aluminize magnesium alloy steel wire and the copper alloy silk of described armour is 6.0 ± 0.03 mm; Raw material components and the weight content of copper alloy silk are as follows, copper: iron: lead: zinc=(89.0 ~ 91.0): (0.03 ~ 0.05): (0.01 ~ 0.05): 10.The copper alloy silk both can be every magnetic, and the loss of avoiding the eddy current magnetic hysteresis to cause increases ampacity, and mechanical strength is bigger than copper again, and cost is then cheap than copper, and have excellent anti-seawater corrosion performance, benefits for the long-term security operation of cable.
Description of drawings
Fig. 1 is a kind of structural representation that increases the submarine cable of ampacity of the utility model.
Among the figure: 1. tin-coated copper helix tube; 2. conductor layer; 3. carbon black paper conductor shield; 4. oil-filled high-tension cable paper insulation layer; 5. carbon black paper insulation screen; 6. copper strips insulation screen; 7. there is not the seam lead alloy sheath; 8. tack polyethylene band inner cushion layer; 9. double-layer stainless steel band reinforced layer; 10. the outer bed course of tack polyethylene band; 11. nonwoven interlining bed course; 12. high density polyethylene (HDPE) anticorrosive coat; 13. armouring inner cushion layer; 14. armour; The magnesium alloy steel wire 14a. aluminize; 14b. copper alloy silk; 15. outer jacket.
Embodiment
As shown in Figure 1, a kind of submarine cable that increases ampacity of the present utility model, the inner chamber of tin-coated copper helix tube 1 is provided with the hollow oil duct, and the aperture of hollow oil duct is 18mm; It is that the high conduction annealed copper line of 2.57 ± 0.03mm constitutes conductor layer 2 that the periphery of tin-coated copper helix tube 1 is arranged with the multifilament diameter, and each high conduction annealed copper line circular array spiral successively closely is arranged in the periphery of tin-coated copper helix tube 1.
The periphery of conductor layer 2 evenly is surrounded with carbon black paper conductor shield 3, and the periphery of carbon black paper conductor shield 3 evenly is surrounded with oil-filled high-tension cable paper insulation layer 4, and the thickness of oil-filled high-tension cable paper insulation layer 4 is 10 ± 0.1mm.The periphery of oil-filled high-tension cable paper insulation layer 4 is surrounded with carbon black paper insulation screen 5, the thickness of carbon black paper conductor shield 3 and carbon black paper insulation screen 5 is respectively 0.5 ± 0.02mm, all adopt the eclipsed form mode to twine, and the winding direction of carbon black paper conductor shield 3 and carbon black paper insulation screen 5 is opposite.
The periphery of carbon black paper insulation screen 5 is surrounded with copper strips insulation screen 6, and the copper strips thickness of copper strips insulation screen 6 is 0.1 ± 0.01 mm, adopts the eclipsed form mode to twine.
The periphery of copper strips insulation screen 6 coats and has or not seam lead alloy sheath 7, no seam lead alloy sheath 7 adopts lead press to extrude continuously, seal intact, thickness is 4.0 ~ 4.3mm, and the weight content in the no seam lead alloy sheath 7 is plumbous: tin: antimony=100:(0.35 ~ 0.45): (0.15 ~ 0.25).
The outer surface of no seam lead alloy sheath 7 evenly is coated with low temperature-20 and ℃ does not chap, 90 ℃ of pitches that do not drip of high temperature, and periphery is surrounded with tack polyethylene band inner cushion layer 8.
The thickness of tack polyethylene band inner cushion layer 8 is that 0.75 ~ 0.80mm and periphery are coated with double-layer stainless steel band reinforced layer 9, the periphery of double-layer stainless steel band reinforced layer 9 is surrounded with the outer bed course 10 of tack polyethylene band, and the thickness of the outer bed course 10 of tack polyethylene band is that 0.75 ~ 0.80mm and periphery are surrounded with nonwoven interlining bed course 11.
The thickness of nonwoven interlining bed course 11 is that 0.15 ~ 0.20mm and periphery are extruded with high density polyethylene (HDPE) anticorrosive coat 12, the nominal thickness of high density polyethylene (HDPE) anticorrosive coat 12 is 3.5mm, minimum thickness is not less than 90% of nominal thickness, maximum ga(u)ge is not more than 110% of nominal thickness, and the diameter deviation that arbitrary vertical cross-section records is no more than 15%.
The periphery of high density polyethylene (HDPE) anticorrosive coat 12 is coated with by polypropylene rope evenly floods the armouring inner cushion layer 13 that rope made of hemp concentric stranding forms at interval.
The periphery of armouring inner cushion layer 13 evenly is coated with pitch and is coated with by the armour 14 that magnesium alloy steel wire 14a and copper alloy silk 14b are at interval even and concentric stranding forms of aluminizing, and the filament diameter of aluminize magnesium alloy steel wire 14a and the copper alloy silk 14b of armour 14 is 6.0 ± 0.03 mm; Raw material components and the weight content of copper alloy silk are as follows, copper: iron: lead: zinc=(89.0 ~ 91.0): (0.03 ~ 0.05): (0.01 ~ 0.05): 10, and tensile strength is 260 ~ 345MPa, elongation at break is not less than 25%.
The periphery of armour 14 is coated with by polypropylene rope evenly at interval floods the outer jacket 15 that rope made of hemp concentric stranding forms, and the periphery of outer jacket 15 evenly is coated with low temperature-20 and ℃ does not chap 90 ℃ of pitches that do not drip of high temperature.The nominal diameter of polypropylene rope and the dipping rope made of hemp is respectively 2.5mm in armouring inner cushion layer 13 and the outer jacket 15, and the direction of lay of armouring inner cushion layer 13 and outer jacket 15 is opposite.
The above-mentioned cable of making is carried out tension stress bending, proof voltage thermal shock, anti-external water pressure and internal oil pressure performance test such as table 1:
Table 1
Below only be the preferable possible embodiments of the utility model, non-so limit to scope of patent protection of the present utility model.In addition to the implementation, the utility model can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of the utility model requirement.
Claims (8)
1. submarine cable that increases ampacity, it is characterized in that: the inner chamber of tin-coated copper helix tube is provided with the hollow oil duct, the periphery of described tin-coated copper helix tube closely is arranged with many high conduction annealed copper lines and constitutes conductor layer, the periphery of described conductor layer evenly is surrounded with the carbon black paper conductor shield, the periphery of described carbon black paper conductor shield evenly is surrounded with oil-filled high-tension cable paper insulation layer, the periphery of described oil-filled high-tension cable paper insulation layer is surrounded with the carbon black paper insulation screen, the periphery of described carbon black paper insulation screen is surrounded with the copper strips insulation screen, the periphery of described copper strips insulation screen coats and has or not the seam lead alloy sheath, the periphery of described no seam lead alloy sheath evenly is coated with pitch and is surrounded with tack polyethylene band inner cushion layer, the periphery of described tack polyethylene band inner cushion layer is coated with double-layer stainless steel band reinforced layer, the periphery of described double-layer stainless steel band reinforced layer is surrounded with the outer bed course of tack polyethylene band, the periphery of the outer bed course of described tack polyethylene band is surrounded with the nonwoven interlining bed course, the periphery of described nonwoven interlining bed course is extruded with the high density polyethylene (HDPE) anticorrosive coat, the periphery of described high density polyethylene (HDPE) anticorrosive coat is coated with by polypropylene rope evenly floods the armouring inner cushion layer that rope made of hemp concentric stranding forms at interval, the periphery of described armouring inner cushion layer evenly is coated with pitch and is coated with by the armour that magnesium alloy steel wire and copper alloy silk are at interval even and concentric stranding forms of aluminizing, the periphery of described armour is coated with by polypropylene rope evenly floods the outer jacket that rope made of hemp concentric stranding forms at interval, and the periphery of outer jacket evenly is coated with pitch.
2. according to the submarine cable of the increase ampacity of claim 1, it is characterized in that the aperture of described hollow oil duct is 18mm; The thickness of oil-filled high-tension cable paper insulation layer is 10 ± 0.1mm.
3. according to the submarine cable of the increase ampacity of claim 1, it is characterized in that the filament diameter of described high conduction annealed copper line is 2.57 ± 0.03mm, circular array spiral successively closely is arranged in the periphery of tin-coated copper helix tube.
4. according to the submarine cable of the increase ampacity of claim 1, it is characterized in that, the thickness of described carbon black paper conductor shield and carbon black paper insulation screen is respectively 0.5 ± 0.02mm, all adopt the eclipsed form mode to twine, and the winding direction of carbon black paper conductor shield and carbon black paper insulation screen is opposite.
5. according to the submarine cable of the increase ampacity of claim 1, it is characterized in that the copper strips thickness of described copper strips insulation screen is 0.1 ± 0.01 mm, adopt the eclipsed form mode to twine.
6. according to the submarine cable of the increase ampacity of claim 1, it is characterized in that the thickness of the outer bed course of described tack polyethylene band inner cushion layer and tack polyethylene band is 0.75 ~ 0.80mm; The thickness of described nonwoven interlining bed course is 0.15 ~ 0.20mm.
7. according to the submarine cable of the increase ampacity of claim 1, it is characterized in that, the nominal thickness of described high density polyethylene (HDPE) anticorrosive coat is 3.5mm, minimum thickness is not less than 90% of nominal thickness, maximum ga(u)ge is not more than 110% of nominal thickness, and the diameter deviation that arbitrary vertical cross-section records is no more than 15%.
8. according to the submarine cable of the increase ampacity of claim 1, it is characterized in that the nominal diameter of polypropylene rope and the dipping rope made of hemp is respectively 2.5mm in described armouring inner cushion layer and the outer jacket, and the direction of lay of armouring inner cushion layer and outer jacket is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220686403 CN203134448U (en) | 2012-12-13 | 2012-12-13 | Submarine cable with increased current-carrying capacity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220686403 CN203134448U (en) | 2012-12-13 | 2012-12-13 | Submarine cable with increased current-carrying capacity |
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| CN203134448U true CN203134448U (en) | 2013-08-14 |
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| CN 201220686403 Expired - Fee Related CN203134448U (en) | 2012-12-13 | 2012-12-13 | Submarine cable with increased current-carrying capacity |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969071A (en) * | 2012-12-13 | 2013-03-13 | 江苏远洋东泽电缆股份有限公司 | Submarine cable with increased current-carrying capacity |
| CN106098192A (en) * | 2016-08-08 | 2016-11-09 | 中天科技海缆有限公司 | A kind of heavy in section molded line conductor 500kV exchanges submarine cable |
| CN107256736A (en) * | 2017-08-07 | 2017-10-17 | 安徽徽宁电器仪表集团有限公司 | A kind of power cable with multiple rectangular protecting frame framves |
| CN107331464A (en) * | 2017-08-07 | 2017-11-07 | 安徽徽宁电器仪表集团有限公司 | A kind of flexible power cable with protect-ing frame structure |
| CN107492408A (en) * | 2017-08-07 | 2017-12-19 | 安徽徽宁电器仪表集团有限公司 | A kind of computer cable with matrix pattern skeleton |
| CN109859891A (en) * | 2019-01-24 | 2019-06-07 | 上海海事大学 | A kind of ocean high-voltage-resistant anti-corrosion cable being conveniently replaceable maintenance |
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2012
- 2012-12-13 CN CN 201220686403 patent/CN203134448U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969071A (en) * | 2012-12-13 | 2013-03-13 | 江苏远洋东泽电缆股份有限公司 | Submarine cable with increased current-carrying capacity |
| CN102969071B (en) * | 2012-12-13 | 2015-03-25 | 江苏远洋东泽电缆股份有限公司 | Submarine cable with increased current-carrying capacity |
| CN106098192A (en) * | 2016-08-08 | 2016-11-09 | 中天科技海缆有限公司 | A kind of heavy in section molded line conductor 500kV exchanges submarine cable |
| CN107256736A (en) * | 2017-08-07 | 2017-10-17 | 安徽徽宁电器仪表集团有限公司 | A kind of power cable with multiple rectangular protecting frame framves |
| CN107331464A (en) * | 2017-08-07 | 2017-11-07 | 安徽徽宁电器仪表集团有限公司 | A kind of flexible power cable with protect-ing frame structure |
| CN107492408A (en) * | 2017-08-07 | 2017-12-19 | 安徽徽宁电器仪表集团有限公司 | A kind of computer cable with matrix pattern skeleton |
| CN107256736B (en) * | 2017-08-07 | 2023-09-05 | 安徽徽宁电器仪表集团有限公司 | Power cable with a plurality of rectangular protection frames |
| CN107331464B (en) * | 2017-08-07 | 2023-09-22 | 安徽徽宁电器仪表集团有限公司 | Flexible power cable with protection frame |
| CN107492408B (en) * | 2017-08-07 | 2023-09-26 | 安徽徽宁电器仪表集团有限公司 | Computer cable with field style of calligraphy skeleton |
| CN109859891A (en) * | 2019-01-24 | 2019-06-07 | 上海海事大学 | A kind of ocean high-voltage-resistant anti-corrosion cable being conveniently replaceable maintenance |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20151213 |
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| EXPY | Termination of patent right or utility model |