CN114883061A - Novel cable and method for relieving ablation of cable buffer layer - Google Patents
Novel cable and method for relieving ablation of cable buffer layer Download PDFInfo
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- CN114883061A CN114883061A CN202210623366.9A CN202210623366A CN114883061A CN 114883061 A CN114883061 A CN 114883061A CN 202210623366 A CN202210623366 A CN 202210623366A CN 114883061 A CN114883061 A CN 114883061A
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- buffer layer
- conductive liquid
- ablation
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- 238000002679 ablation Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 41
- 238000009413 insulation Methods 0.000 claims abstract description 15
- 230000000116 mitigating effect Effects 0.000 claims 2
- 229920003020 cross-linked polyethylene Polymers 0.000 abstract description 14
- 239000004703 cross-linked polyethylene Substances 0.000 abstract description 14
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000000843 powder Substances 0.000 description 26
- 238000010586 diagram Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 12
- 230000008859 change Effects 0.000 description 8
- 230000007423 decrease Effects 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 231100000252 nontoxic Toxicity 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
- H01B13/221—Sheathing; Armouring; Screening; Applying other protective layers filling-up interstices
-
- 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
-
- 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
- H01B7/0009—Details relating to the conductive cores
- H01B7/0027—Liquid conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
Abstract
The invention relates to the invention and discloses a novel cable and a method for relieving ablation of a cable buffer layer; the method is characterized in that a conductive liquid is filled between an aluminum sheath and an insulation shielding layer. The problem of buffer layer ablation can be effectively solved, and the service life of the high-pressure crosslinked polyethylene cable is prolonged.
Description
Technical Field
The invention relates to a novel cable and a method for relieving ablation of a cable buffer layer, and belongs to the technical field of cables.
Background
The high-voltage cable has the advantages of higher reliability, small occupied area and the like, and is widely applied to power grids in China. The high-voltage crosslinked polyethylene cable is a choice for cable construction in China due to the advantages of excellent mechanical performance, convenience in installation and maintenance, excellent insulating performance and the like. According to investigation, the high-voltage crosslinked polyethylene cable which is put into operation in China at present mostly adopts a corrugated aluminum sheath structure, and a buffer layer is additionally arranged between an aluminum sheath and an insulation shielding layer. The buffer layer can provide heat insulation, water resistance and other functions, so that the aluminum sheath and the insulating shielding layer can keep good electrical contact.
High-voltage crosslinked polyethylene cables have been used for decades since the beginning of the successive operations in China in the 80 s of the last century. With the increase of service life, the water-blocking buffer layer of the high-voltage cross-linked polyethylene cable is continuously ablated in the recent period of time by a plurality of power grids in China, and the ablation position is shown in figure 1.
The buffer layer is formed by winding the water-blocking tape, and according to related research, a large amount of surface burns of the insulating shielding layer can occur at fault points, so that local overheating and even breakdown occur. Therefore, how to relieve the ablation phenomenon of the high-pressure crosslinked polyethylene cable buffer layer is an urgent problem to be solved at present.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for filling a conductive liquid between an aluminum sheath and an insulation shielding layer. The problem of buffer layer ablation can be effectively solved, and the service life of the high-pressure crosslinked polyethylene cable is prolonged.
The technical scheme of the invention is as follows:
a method for relieving ablation of a cable buffer layer is characterized in that a conductive liquid is filled between an aluminum sheath and an insulation shielding layer.
Further, the relative dielectric constant of the conductive liquid is 1000-5000, and the conductivity is 1 x 10 -6 -1*10 -3 S/m。
The invention also comprises a novel cable which comprises the conductive layer formed by filling the conductive liquid between the aluminum sheath and the insulation shielding layer.
Furthermore, the semiconductor buffer strip is arranged on the conductive layer.
The invention has the beneficial effects that:
1. according to the method for relieving ablation of the cable buffer layer, the conductive liquid is filled, and the conductive liquid has good conductivity, so that the problem of local overheating caused by uneven resistance on the buffer layer can be effectively solved; meanwhile, as the electrical property of the conductive liquid is close to that of the cable semi-conductive layer, other problems are avoided; moreover, the conductive liquid has good fluidity and can be filled into a long-distance cable;
2. the conductive liquid is filled between the aluminum sheath and the insulation shielding layer, so that the cable sheath has the characteristics of no toxicity, stable physical and chemical properties and no corrosion to the cable; the buffer layer is filled for a long time, so that the buffer layer cannot permeate and invade the main insulation, and the insulation performance of the cable is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a diagram of a cable buffer layer of the present invention being burned;
FIG. 2 is a diagram showing a buffer layer of comparative example 1 of the present invention with or without white powder;
FIG. 3 is a graph of the temperature profile of the cable with the aluminum jacket of example 1 of the present invention and the comparative example in good contact with the buffer layer;
FIG. 4 is a graph of the electric field distribution of the cable in which the aluminum sheaths of example 1 and comparative examples of the present invention are in good contact with the buffer layer;
FIG. 5 is a graph showing a current density distribution when white powder is generated in the aluminum sheath and buffer layers according to example 1 and comparative example of the present invention;
FIG. 6 is a graph showing the field intensity distribution of the cable in the presence of white powder in the aluminum sheath and buffer layers according to example 1 and comparative example of the present invention;
FIG. 7 is a graph showing the temperature distribution of the cable in the presence of white powder in the aluminum sheath and buffer layers according to example 1 and comparative example of the present invention;
FIG. 8 is a graph showing a current density distribution when white powder appears in the aluminum sheath and buffer layer of example 2;
FIG. 9 is a graph plotting the maximum current density values of FIG. 8;
FIG. 10 is a field intensity distribution diagram of the cable in which white powder appears in the aluminum sheath and the buffer layer in example 2;
FIG. 11 is a temperature profile of the cable in which white powder appears in the aluminum jacket and buffer layers of example 2;
FIG. 12 is a graph showing a distribution of current density when white powder appears in the aluminum sheath and buffer layers of example 3;
FIG. 13 is a graph plotting the maximum values of current density selected from FIG. 12;
FIG. 14 is a graph of the temperature profile of the cable with white powder on the aluminum jacket and buffer layers of example 3;
fig. 15 is a diagram of a novel cable configuration.
In the drawings, the components represented by the respective reference numerals are listed below:
1. an aluminum sheath; 2. an insulating shield layer; 3. a conductive layer; 4. a semiconducting buffer tape.
Detailed Description
The invention will be further described with reference to preferred embodiments.
Example 1
As shown in fig. 1, an XLPE cable of 220kV voltage class is filled with a conductive solution between an aluminum sheath 1 and an insulating shield 2. And the semiconductor buffer strip 4 is also included, and the semiconductor buffer strip 3 is arranged on the insulation shielding layer 2.
Filling XLPE cables with 220kV voltage class with a conductive liquid, wherein the electrical parameters of the conductive liquid are shown in a table 1:
TABLE 1 Electrical parameters of conductive fluids
| Relative |
100 |
| Thermal conductivity/W (m.K) -1 | 0.4 |
| Constant pressure heat capacity J/(kg. K) | 2120 |
| Conductivity S/m | 6*10 -3 |
| pH | 7.0 |
| Toxicity | Non-toxic and harmless |
Example 2
Filling XLPE cables with 220kV voltage class with a conductive liquid, wherein the electrical parameters of the conductive liquid are shown in a table 2:
TABLE 2 Electrical parameters of the conductive liquid
| Relative |
100 |
| Thermal conductivity/W (m.K) -1 | 0.29 |
| Constant pressure heat capacity J/(kg. K) | 2120 |
| Conductivity S/m | 10 -3 -10 -12 |
| pH | 7.0 |
| Toxicity | Non-toxic and harmless |
FIG. 8 shows that the conductivity of example 2 was decreased by 10 times from 0.001S/m to 1e -12 S/m (conductivity in order: 1X 10) -3 S/m、1×10 -4 S/m、1×10 -5 S/m、1×10 -6 S/m、1×10 -7 S/m、1×10 -8 S/m、1×10 -9 S/m、1×10 -10 S/m、 1×10 -11 S/m), the current density distribution when white powder appears on the aluminum sheath and buffer layer, and it can be seen from the graph that the current density is most uniform, 1 × 10, when the conductivity is 0.001S/m -11 And most uniformly. For further explanation, FIG. 9 is presented.
FIG. 9 shows the maximum current density in each case of FIG. 8, i.e. the maximum current density as a function of the electrical conductivity, which is 10 -3 To 10 -6 When the conductivity is 10, the current density is not greatly changed -6 Reduced to 10 -7 The current density increases at the fastest rate, by a factor of 1.85. Therefore, the range of conductivity is 10 -6 The above.
FIG. 10 shows the change in conductivity in example 2 (conductivity in the order of 1X 10) -3 、1×10 -4 、1×10 -5 、1×10 -6 、1×10 -7 、 1×10 -8 、1×10 -9 、1×10 -10 、1×10 -11 ) The field intensity distribution diagram of the cable when white powder appears on the aluminum sheath and the buffer layer; it can be seen from the figure that as the conductivity decreases, the field strength maximum is on the main insulation and its value does not change, but the field strength at the aluminium sheath and trough position is greater and greater, but does not exceed the field strength on the main insulation.
FIG. 11 shows the change in conductivity in example 2 (conductivity in the order of 1X 10) -3 、1×10 -4 、1×10 -5 、1×10 -6 、1×10 -7 、 1×10 -8 、1×10 -9 、1×10 -10 、1×10 -11 ) The cable temperature distribution diagram when white powder appears on the aluminum sheath and the buffer layer; as can be seen from the graph, when the conductivity decreased to 10 -7 In the case of white powder between the trough and the aluminum sheath, a significant concentration of temperature occurred, but the maximum was unchanged.
In summary, the conductivity was 10 -6 -10 -3 S/m, the problem of buffer layer ablation caused by poor contact can be better solved by adopting the conductive liquid. This is achieved byThis is because as the conductivity increases, the leakage current is no longer concentrated at the white powder to ground, and the current distribution is proportional to the temperature, and therefore the temperature distribution, thereby suppressing ablation of the buffer layer.
Example 3
Filling XLPE cables with 220kV voltage class with a conductive liquid, wherein the electrical parameters of the conductive liquid are shown in a table 3:
TABLE 3 Electrical parameters of the conductive liquid
| Relative dielectric constant | 1-5000 |
| Thermal conductivity/W (m.K) -1 | 0.29 |
| Constant pressure heat capacity J/(kg. K) | 2120 |
| Conductivity S/ |
10 -6 |
| pH | 7.0 |
| Toxicity | Non-toxic and harmless |
FIG. 12 is a graph of the current density distribution of the aluminum sheath and buffer layer in the presence of white powder for the case of example 3 having a relative dielectric constant of 1-5000 (values 1,10,50,100,200,1000, 3000,4000,5000), and FIG. 13 is a graph of the current density distribution of FIG. 12 for different relative dielectric constantsAs can be seen from the figure, as the relative permittivity increases, the current density on the main insulation increases, but the current density maximum decreases. As can be seen from FIGS. 12 and 13, the maximum current density is the minimum value when the relative dielectric constant is 1000, and the current density is less than 250mA/m when the relative dielectric constant is 1000-5000 -2 。
In example 3, the field intensity change was not so large when white powder was present between the aluminum sheath and the buffer layer.
Fig. 14 is a temperature distribution diagram of the cable in which white powder appears in the aluminum sheath and buffer layer of example 3, and the temperature on the cable decreases as the relative dielectric constant increases. It is stated that increasing the dielectric constant may result in a decrease in the operating temperature of the cable.
Taking the middle part of the cable, horizontally making a line, and observing the temperature distribution on the line according to different relative dielectric constants. The larger the relative dielectric constant, the lower the temperature. In conclusion, the relative dielectric constant is 1000-.
Example 4
Filling XLPE cables with a voltage class of 220kV with a conductive liquid, wherein the electrical parameters of the conductive liquid are shown in Table 4:
TABLE 4 Electrical parameters of the conductive liquid
Comparative example 1
XLPE cable with 220kV voltage class (without conductive liquid added).
In addition, it should be noted that the solution of the present application is also applicable to other types of cables, such as XLPE cables with 110kV voltage class.
Table 1 shows the influence of the conductive liquid on the electrical performance of the waterproof tape after the conductive liquid soaks the buffer layer, and the measurement samples are shown in fig. 2. The white powder is separated out from the interior of the water-blocking tape of the buffer layer and is intensively distributed on the surface of the test article, so that the surface resistivity of the water-blocking tape after the generation of the white powder is found to be increased by measuring the surface resistivity, but the conductivity of the water-blocking tape can be effectively reduced after the water-blocking tape is soaked by the conductive liquid.
TABLE 1 surface resistivity of the buffer zone before and after infiltration
| Surface resistivity/Ω · cm before wetting | Surface resistivity/Ω · cm after wetting | |
| White powder | 1.42*10 5 | 5.10*10 4 |
| Non-white powder | 7.96*10 4 | 4.34*10 3 |
Simulation analysis
And establishing a two-dimensional axisymmetric model for the cable to carry out finite element simulation, and simulating the changes of the cable in field intensity, temperature and current density before and after the buffer layer of the cable is affected with damp and white powder appears.
FIG. 3 is a graph of the temperature profile of a cable with the aluminum jacket in good contact with the buffer layer, where (a) is a graph of a comparative example without the addition of a conductive liquid and (b) is a graph of example 1 with the addition of a conductive liquid; during normal operation of the cable, both voltage and current are carried on the cable. Although the current in the wire core flows along the axial direction, the generated heat is diffused along the radial direction, and the temperature of each structural layer of the cable is increased to different degrees. As can be seen from fig. 3, the white boxes represent the areas between the aluminum sheath and the buffer layer, where the temperature change in the area (a) is more obvious than the temperature change in the area (b), i.e., the temperature change in the area is reduced and the temperature value is lower after the conductive liquid is added.
FIG. 4 is a diagram of the electric field distribution of the cable when the aluminum sheath is in good contact with the buffer layer, wherein (a) is a diagram of a comparative example without adding the conductive liquid, and (b) is a diagram of an example 1 with adding the conductive liquid; as can be seen from FIG. 4, the field strength of the cable did not change significantly before and after the addition of the semi-conductive liquid.
In the cable at the actual motion in-process, because expend with heat and contract with cold's reason, the aluminium sheath and the buffer layer of cable can not guarantee everywhere to contact well, can have air gap between aluminium sheath and the buffer layer. The current density, electric field and temperature distribution in this case were therefore investigated. Fig. 5 is a diagram showing a current density distribution when white powder is present in the aluminum sheath and the buffer layer, wherein (a) is a diagram of a comparative example in which the conductive liquid is not added, and (b) is a diagram of example 1 in which the conductive liquid is added. When the cable is wetted, white powder appears at the valleys of the buffer layer where the current density increases and thus buffer layer ablation occurs. As can be seen from FIG. 5, the current density at the ablation point is much higher than the normal maximum current density, which is 1.13X 10 4 mA/m 2 . After the conductive liquid is added, the current density at the current density concentration position of the original cable is not concentrated any more, the maximum current density is obviously reduced, and the maximum current density is 323mA/m 2 . The maximum current density was reduced by a factor of 35 after addition of the conductive liquid.
FIG. 6 is a graph of the field intensity distribution of the cable when white powder appears on the aluminum sheath and the buffer layer, wherein (a) is a graph of a comparative example without adding the conductive liquid, and (b) is a graph of example 1 with adding the conductive liquid. As can be seen from fig. 6, since the aluminum sheath and the buffer layer of the cable are not tightly pressed, the field strength is locally increased at the positions of the wave troughs and the buffer layer of the aluminum sheath. The field intensity of the ablation point on the buffer layer is much higher than that of other points, and the value of the field intensity is 1.9 multiplied by 10 8 V/m. And the cable field intensity changes after the conductive liquid is addedThe uniform field intensity of the ablation point at the trough of the aluminum sheath is not obviously changed, and the maximum field intensity is obviously reduced and is 1.33 multiplied by 10 7 V/m. The maximum field strength is reduced by 14 times after the conductive liquid is added.
Fig. 7 is a graph of the temperature distribution of the cable when white powder appears on the aluminum sheath and the buffer layer, wherein (a) is a graph of a comparative example without adding the conductive liquid, and (b) is a graph of example 1 with adding the conductive liquid. As can be seen from FIG. 7, since the current density at the ablation point is very large, the temperature is proportional to the current density, and therefore the temperature at the ablation point is also significantly higher than that at other positions. After the conductive liquid is added, the temperature of the ablation point is not obviously changed compared with the normal cable temperature, and the overall temperature of the cable is reduced.
In conclusion, the problem of cable ablation can be solved after the conductive liquid is added, and the service life of the cable is prolonged.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A method of mitigating cable buffer ablation, comprising: conductive liquid is filled between the aluminum sheath (1) and the insulation shielding layer (2).
2. The method of mitigating cable buffer ablation of claim 1, wherein: the relative dielectric constant of the conductive liquid is 1000-5000- -6 -1*10 -3 S/m。
3. A novel cable is characterized in that: comprises the conductive layer (3) formed by filling the conductive liquid between the aluminum sheath (1) and the insulation shielding layer (2) as claimed in claim 1.
4. A novel cable according to claim 3, characterized in that: the conductive layer is characterized by further comprising a semi-conductive buffer strip (4), wherein the semi-conductive buffer strip (4) is arranged on the conductive layer (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210623366.9A CN114883061A (en) | 2022-06-02 | 2022-06-02 | Novel cable and method for relieving ablation of cable buffer layer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210623366.9A CN114883061A (en) | 2022-06-02 | 2022-06-02 | Novel cable and method for relieving ablation of cable buffer layer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE746743A (en) * | 1969-03-03 | 1970-09-02 | Dow Chemical Co | PROCESS FOR MAKING CONDUCTIVE SHIELDS IN METAL CABLES |
| JP2005251457A (en) * | 2004-03-02 | 2005-09-15 | Furukawa Electric Co Ltd:The | Power cable |
| CN203288331U (en) * | 2013-05-27 | 2013-11-13 | 常州欧贝斯绝缘材料有限公司 | Semiconductive buffering water-blocking tape |
| CN205230649U (en) * | 2015-11-23 | 2016-05-11 | 四川明星电缆股份有限公司 | Insulating welding wrinkle aluminum alloy cover polymer sheath high tension cable of crosslinked polyethylene |
| CN111292888A (en) * | 2020-03-05 | 2020-06-16 | 国网电力科学研究院武汉南瑞有限责任公司 | Corrugated aluminum sheath high-voltage power cable resistant to buffer layer ablation |
| CN111883317A (en) * | 2020-06-09 | 2020-11-03 | 华南理工大学 | Method for eliminating cable insulation shielding ablation |
| CN213459117U (en) * | 2020-08-06 | 2021-06-15 | 信承瑞电缆有限公司 | Corrugated aluminum sheath cable |
-
2022
- 2022-06-02 CN CN202210623366.9A patent/CN114883061A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE746743A (en) * | 1969-03-03 | 1970-09-02 | Dow Chemical Co | PROCESS FOR MAKING CONDUCTIVE SHIELDS IN METAL CABLES |
| JP2005251457A (en) * | 2004-03-02 | 2005-09-15 | Furukawa Electric Co Ltd:The | Power cable |
| CN203288331U (en) * | 2013-05-27 | 2013-11-13 | 常州欧贝斯绝缘材料有限公司 | Semiconductive buffering water-blocking tape |
| CN205230649U (en) * | 2015-11-23 | 2016-05-11 | 四川明星电缆股份有限公司 | Insulating welding wrinkle aluminum alloy cover polymer sheath high tension cable of crosslinked polyethylene |
| CN111292888A (en) * | 2020-03-05 | 2020-06-16 | 国网电力科学研究院武汉南瑞有限责任公司 | Corrugated aluminum sheath high-voltage power cable resistant to buffer layer ablation |
| CN111883317A (en) * | 2020-06-09 | 2020-11-03 | 华南理工大学 | Method for eliminating cable insulation shielding ablation |
| CN213459117U (en) * | 2020-08-06 | 2021-06-15 | 信承瑞电缆有限公司 | Corrugated aluminum sheath cable |
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