CN105551673A - Manufacturing method of heavy current-carrying power cable - Google Patents
Manufacturing method of heavy current-carrying power cable Download PDFInfo
- Publication number
- CN105551673A CN105551673A CN201610114374.5A CN201610114374A CN105551673A CN 105551673 A CN105551673 A CN 105551673A CN 201610114374 A CN201610114374 A CN 201610114374A CN 105551673 A CN105551673 A CN 105551673A
- Authority
- CN
- China
- Prior art keywords
- layer
- spiral layer
- power cable
- electric wire
- carrying power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 43
- 238000005520 cutting process Methods 0.000 claims abstract description 18
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 101
- 230000004888 barrier function Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 10
- 230000006698 induction Effects 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 6
- 238000007654 immersion Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000002966 varnish Substances 0.000 claims description 3
- -1 screen Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 238000002955 isolation Methods 0.000 abstract 2
- 239000002994 raw material Substances 0.000 abstract 2
- 238000002791 soaking Methods 0.000 abstract 1
- 238000004544 sputter deposition Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
-
- 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
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/143—Insulating conductors or cables by extrusion with a special opening of the extrusion head
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/16—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying
- H01B13/165—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying by spraying
-
- 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
- H01B9/024—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of braided metal wire
Abstract
The invention discloses a manufacturing method of a heavy current-carrying power cable. The power cable comprises a cable core, an inner insulation layer, a shielding layer and a protection layer from the inside out; the manufacturing method comprises following steps: 1, passing the raw material pool of the inner insulation layer in a molten state by the cable core, extruding with an extruder to form an electric wire composed of the cable core and the inner insulation layer; 2, coating a layer of metal film on the surface of the inner insulation layer in sputtering and spraying modes; 3, straightening the electric wire by a machine tool, rotating continuously, continuously walking along the electric wire by a cutter with a certain width, thus cutting out spiral metal paths and forming an inner spiral layer; 4, forming an isolation film outside of the inner spiral layer in a coating or oil soaking mode; 5, forming an outer spiral layer on the surface of the isolation film by copying the steps 2 and 3; 6, passing the raw material pool of the protection layer in the molten state by the electric wire containing the cable core, the inner insulation layer and the shielding layer, extruding with the extruder, thus forming the heavy current-carrying power cable.
Description
[technical field]
The present invention relates to electric wire field, especially, relate to a kind of large current-carrying power cable.
[background technology]
In power cable field, particularly for the electric wire with information spreading function, in order to prevent extraneous interference, also in order to suppress the radiation leakage of core, usually all need to wrap up at least one deck metal screen layer in the outside of core; By the setting of screen, can effectively prevent outside environmental electromagnetic wave from having influence on current signal in core, decrease alternating current in core to external radiation.
This kind of screen mainly contains two kinds, and a kind of is the silk screen be interwoven by wire, and another kind is tubular metal thin-walled; In fact, for woven wire, be also equivalent to the tubular metal thin-walled that surface is covered with through hole.For above-mentioned screen, the subject matter of existence is, the alternating current in core will go out vortex flow at screen surface induction, and due to the existence of this kind of vortex flow, the ampacity of electric wire is limited by very large, and ampacity is larger, then eddy current loss is larger; Therefore, current shielding wire, in current-carrying process, line loss is larger.
[summary of the invention]
For the problems referred to above, the object of the present invention is to provide a kind of large current-carrying power cable, this power cable not only has good shielding action, and has less eddy current loss, is applicable to large current-carrying operation.
The technical solution adopted for the present invention to solve the technical problems is: this power cable comprises core, inner insulating layer, screen, protective layer from the inside to the outside; Described screen is divided into three layers, is respectively interior spiral layer, barrier film, outer spiral layer from the inside to the outside; Described interior spiral layer, outer spiral layer surface have in straight spiral metal path, between the adjacent turn of this straight spiral metal path, there is clearance for insulation, insulating voids between the metal path of described interior spiral layer, in radial directions just just to the metal path of described outer spiral layer.
As preferably, just there is one piece of conductive contact surfaces on described interior spiral layer, outer spiral layer surface every a segment distance, and described conductive contact surfaces corresponding on each interior spiral layer, outer spiral layer is contacted with each other by the cut on described barrier film; Thus induced electromotive force that is respective produced, that have identical Direction of circulation on interior spiral layer, outer spiral layer is cancelled out each other, this further obviates the small vortex flow on spiral metal path, and the line loss of electric wire is reduced further.
As preferably, described barrier film is made up of insulating varnish, and its thickness is 0.2mm ~ 0.5mm, makes the distance that interior spiral layer, outer spiral layer keep nearer, thus makes the induced electromotive force on interior spiral layer, outer spiral layer be close to equal.
As preferably, on described outer spiral layer, the width of each circle of metal path is slightly larger than the width of each circle of metal path on interior spiral layer, thus make the electric induction ability of metal path on outer spiral layer a little more than interior spiral layer, to make up outer spiral layer off-line core difference far away.
Present invention also offers a kind of manufacture method of described power cable, this manufacture method comprises the steps:
One, make core by the feed reservoir of the described inner insulating layer under molten condition, and extrude via extruder, form the electric wire be made up of core, inner insulating layer;
Two, to sputter, the mode such as spraying, coat layer of metal film on described inner insulating layer surface;
Three, adopt lathe by pulling wire direct join continuous rotation, then adopt the cutting knife with one fixed width along electric wire continuous walking, thus cut out spiral metal path, form described interior spiral layer;
Four, to apply or the mode of oil immersion, described barrier film is formed in described interior spiral layer outside;
Five, imitate step 2, three, form described outer spiral layer in described barrier film appearance;
Six, make to comprise core, inner insulating layer, screen electric wire by the feed reservoir of the described protective layer under molten condition, and to extrude via extruder, form described large current-carrying power cable.
As preferably, in step 3, be provided with stress induction sheet for the tool-holder of cutting knife described in clamping, the installation site of described stress induction sheet requires it is to sense the radial force of cutting knife; And described tool-holder give the cutter degree of depth controlled by electrical module, described electrical module according to the radial force of described cutting knife regulate described tool-holder give the cutter degree of depth, make the radial force of cutting knife maintain constant.
Beneficial effect of the present invention is: this large current-carrying power cable is when current-carrying, the radiation that the arbitrfary point of core produces, in described in radial directive during spiral layer, catch by the metal path of interior spiral layer, continue outwards projection, catch by the metal path of outer spiral layer, thus cannot externally environmental radiation again; Equally, the interference signal of external environment condition also cannot enter core; And after being caught by the metal path of described interior spiral layer or outer spiral layer, because metal path is in wire substantially, there is no large-area continuous surface, therefore, the generation of eddy current is greatly limited, and only there is small eddy current at interior spiral layer and outer spiral layer surface; Something which increases the current capacity of electric wire.
[accompanying drawing explanation]
Fig. 1 is the cross sectional representation of this large current-carrying power cable.
Fig. 2 is the partial enlarged drawing of I part in Fig. 1.
Fig. 3 is in this large current-carrying power cable, the contrast schematic diagram of an embodiment of interior spiral layer, outer spiral layer.
[embodiment]
Below in conjunction with drawings and Examples, the present invention is further described:
As shown in Figure 1 and Figure 2, this power cable comprises core 1, inner insulating layer 2, screen 3, protective layer 4 from the inside to the outside.
Described screen 3 is divided into three layers, is respectively interior spiral layer 31, barrier film 30, outer spiral layer 32 from the inside to the outside; Described interior spiral layer 31, outer spiral layer 32 surface have in straight spiral metal path, have clearance for insulation between the adjacent turn of this straight spiral metal path; As shown in Figure 3, the insulating voids 310 between the metal path 311 of described interior spiral layer 31, in radial directions just just to the metal path 321 of described outer spiral layer 32; Equally, the insulating voids 320 between the metal path 321 of described outer spiral layer 32, in radial directions just just to the metal path 311 of described interior spiral layer 31.
Described barrier film 30 is made up of insulating varnish, and its thickness is 0.2mm ~ 0.5mm, makes interior spiral layer 31, outer spiral layer 32 keeps nearer distance, thus make the induced electromotive force on interior spiral layer 31, outer spiral layer 32 be close to equal.
Above-mentioned large current-carrying power cable is when current-carrying, the radiation that the arbitrfary point of core 1 produces, in described in radial directive during spiral layer 31, catch by the metal path 311 of interior spiral layer 31, continue outwards projection, catch by the metal path 321 of outer spiral layer 32, thus cannot externally environmental radiation again; Equally, the interference signal of external environment condition also cannot enter core 1; And after being caught by the metal path 311,321 of described interior spiral layer 31 or outer spiral layer 32, because metal path is in wire substantially, there is no large-area continuous surface, therefore, the generation of eddy current is greatly limited, and only there is small eddy current at interior spiral layer and outer spiral layer surface; Something which increases the current capacity of electric wire.
In addition, in the embodiment shown in fig. 3, described interior spiral layer 31, outer spiral layer 32 surface just have one piece of conductive contact surfaces 312,322 every a segment distance, and described conductive contact surfaces corresponding on each interior spiral layer 31, outer spiral layer 32 is contacted with each other by the cut on described barrier film 30; Thus make respective produced, that there is identical Direction of circulation induced electromotive force on interior spiral layer 31, outer spiral layer 32, as Fig. 3 bend arrow illustrated, cancel out each other, this further obviates the small vortex flow on spiral metal path, and the line loss of electric wire is reduced further.
For above-mentioned power cable, its manufacture can be carried out in accordance with the following steps:
One, make core by the feed reservoir of the described inner insulating layer under molten condition, and extrude via extruder, form the electric wire be made up of core, inner insulating layer;
Two, to sputter, the mode such as spraying, coat layer of metal film on described inner insulating layer surface;
Three, adopt lathe by pulling wire direct join continuous rotation, then adopt the cutting knife with one fixed width along electric wire continuous walking, thus cut out spiral metal path, form described interior spiral layer;
Four, to apply or the mode of oil immersion, described barrier film 30 is formed in described interior spiral layer outside; Further, corresponding to the place of described conductive contact surfaces 312,322, breaking barrier film 30, forming cut;
Five, imitate step 2, three, form described outer spiral layer in described barrier film appearance;
Six, make to comprise core, inner insulating layer, screen electric wire by the feed reservoir of the described protective layer under molten condition, and to extrude via extruder, form described large current-carrying power cable.
In addition, consider that wire body is flexible, even if it is stretching, make it tighten, when cutting its surface, being also difficult to as rigid body, making wire body consistency; Therefore, can arrange stress induction sheet on the tool-holder for cutting knife described in clamping, the installation site of described stress induction sheet requires it is to sense the radial force of cutting knife; And described tool-holder give the cutter degree of depth controlled by electrical module, described electrical module according to the radial force of described cutting knife regulate described tool-holder give the cutter degree of depth, make the radial force of cutting knife maintain constant; Like this, it is basicly stable for being destroyed required radial pressure due to interior spiral layer, outer spiral layer metal film on surface, even if electric wire deformation, this radial pressure destroyed needed for metal film is also substantially constant, therefore, by stress induction sheet and controlled tool-holder, can ensure that metal film is subject to reliable cutting, described inner insulating layer, barrier film are then unaffected.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a manufacture method for large current-carrying power cable, this power cable comprises core, inner insulating layer, screen, protective layer from the inside to the outside; , it is characterized in that: this manufacture method comprises the steps:
One, make core by the feed reservoir of the described inner insulating layer under molten condition, and extrude via extruder, form the electric wire be made up of core, inner insulating layer;
Two, to sputter, the mode such as spraying, coat layer of metal film on described inner insulating layer surface;
Three, adopt lathe by pulling wire direct join continuous rotation, then adopt the cutting knife with one fixed width along electric wire continuous walking, thus cut out spiral metal path, spiral layer in being formed;
Four, to apply or the mode of oil immersion, barrier film is formed in described interior spiral layer outside;
Five, imitate step 2, three, form outer spiral layer in described barrier film appearance;
Six, make to comprise core, inner insulating layer, screen electric wire by the feed reservoir of the described protective layer under molten condition, and to extrude via extruder, form described large current-carrying power cable.
2. the manufacture method of large current-carrying power cable according to claim 1, it is characterized in that: in step 3, be provided with stress induction sheet for the tool-holder of cutting knife described in clamping, the installation site of described stress induction sheet requires it is to sense the radial force of cutting knife; And described tool-holder give the cutter degree of depth controlled by electrical module, described electrical module according to the radial force of described cutting knife regulate described tool-holder give the cutter degree of depth, make the radial force of cutting knife maintain constant.
3. the manufacture method of large current-carrying power cable according to claim 1, is characterized in that: the screen of the cable produced is divided into three layers, is respectively interior spiral layer, barrier film, outer spiral layer from the inside to the outside; Described interior spiral layer, outer spiral layer surface have in straight spiral metal path, between the adjacent turn of this straight spiral metal path, there is clearance for insulation, insulating voids between the metal path of described interior spiral layer, in radial directions just just to the metal path of described outer spiral layer; Just there is one piece of conductive contact surfaces on described interior spiral layer, outer spiral layer surface every a segment distance, and described conductive contact surfaces corresponding on each interior spiral layer, outer spiral layer is contacted with each other by the cut on described barrier film.
4. the manufacture method of large current-carrying power cable according to claim 3, is characterized in that: described barrier film is made up of insulating varnish, and its thickness is 0.2mm ~ 0.5mm.
5. the manufacture method of large current-carrying power cable according to claim 3, is characterized in that: on described outer spiral layer, the width of each circle of metal path is slightly larger than the width of each circle of metal path on interior spiral layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610114374.5A CN105551673B (en) | 2014-03-10 | 2014-03-10 | Manufacturing method of heavy current-carrying power cable |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610114374.5A CN105551673B (en) | 2014-03-10 | 2014-03-10 | Manufacturing method of heavy current-carrying power cable |
| CN201410083592.8A CN103811128B (en) | 2014-03-10 | 2014-03-10 | Large current-carrying power cable |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410083592.8A Division CN103811128B (en) | 2014-03-10 | 2014-03-10 | Large current-carrying power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105551673A true CN105551673A (en) | 2016-05-04 |
| CN105551673B CN105551673B (en) | 2017-04-26 |
Family
ID=50707774
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610114374.5A Expired - Fee Related CN105551673B (en) | 2014-03-10 | 2014-03-10 | Manufacturing method of heavy current-carrying power cable |
| CN201610025820.5A Active CN105609201B (en) | 2014-03-10 | 2014-03-10 | Big current-carrying power line manufacture method |
| CN201410083592.8A Expired - Fee Related CN103811128B (en) | 2014-03-10 | 2014-03-10 | Large current-carrying power cable |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610025820.5A Active CN105609201B (en) | 2014-03-10 | 2014-03-10 | Big current-carrying power line manufacture method |
| CN201410083592.8A Expired - Fee Related CN103811128B (en) | 2014-03-10 | 2014-03-10 | Large current-carrying power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN105551673B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106816210A (en) * | 2016-12-05 | 2017-06-09 | 国网江苏省电力公司盐城供电公司 | A kind of power cable |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2284995Y (en) * | 1996-08-14 | 1998-06-24 | 鸿海精密工业股份有限公司 | Cable conductor |
| JP2006107769A (en) * | 2004-09-30 | 2006-04-20 | Showa Electric Wire & Cable Co Ltd | Manufacturing device of shielded cable |
| CN101950619A (en) * | 2010-09-03 | 2011-01-19 | 宁波东方电缆股份有限公司 | Hybrid armored structure of single-core high-voltage submarine cable |
| CN103456401A (en) * | 2013-08-29 | 2013-12-18 | 常州苏控自动化设备有限公司 | Cable special for frequency changer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6916724A (en) * | 1968-11-14 | 1970-05-19 | ||
| GB9204917D0 (en) * | 1992-03-06 | 1992-04-22 | Spiro Machines Sa | Apparatus for cutting helically wound metal tubing |
| JP5499935B2 (en) * | 2009-10-05 | 2014-05-21 | 日立金属株式会社 | Shielded cable |
| CN102280193B (en) * | 2011-08-16 | 2013-09-11 | 安徽滨江电缆股份有限公司 | Cable with high current-carrying capacity |
| CN203232719U (en) * | 2013-03-05 | 2013-10-09 | 合肥市深朝电子有限公司 | High efficiency wrap resistance shielding wire |
-
2014
- 2014-03-10 CN CN201610114374.5A patent/CN105551673B/en not_active Expired - Fee Related
- 2014-03-10 CN CN201610025820.5A patent/CN105609201B/en active Active
- 2014-03-10 CN CN201410083592.8A patent/CN103811128B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2284995Y (en) * | 1996-08-14 | 1998-06-24 | 鸿海精密工业股份有限公司 | Cable conductor |
| JP2006107769A (en) * | 2004-09-30 | 2006-04-20 | Showa Electric Wire & Cable Co Ltd | Manufacturing device of shielded cable |
| CN101950619A (en) * | 2010-09-03 | 2011-01-19 | 宁波东方电缆股份有限公司 | Hybrid armored structure of single-core high-voltage submarine cable |
| CN103456401A (en) * | 2013-08-29 | 2013-12-18 | 常州苏控自动化设备有限公司 | Cable special for frequency changer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105551673B (en) | 2017-04-26 |
| CN105609201B (en) | 2017-07-14 |
| CN103811128B (en) | 2016-04-20 |
| CN103811128A (en) | 2014-05-21 |
| CN105609201A (en) | 2016-05-25 |
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| CB03 | Change of inventor or designer information |
Inventor after: Liu Bing Inventor after: Gao Yuan Inventor after: Wang Yi Inventor after: Liu Gang Inventor after: Zhong Gang Inventor after: Meng Cheng Inventor after: Xu Chong Inventor after: Yuan Hongkun Inventor after: Zhang Xiuling Inventor after: Zhang Bingwen Inventor after: Wang Run Inventor after: Wang Hui Inventor after: Sun Hancheng Inventor after: Yang Yi Inventor after: Geng Ning Inventor after: Di Lei Inventor after: Li Xueting Inventor after: Zhou Gang Inventor after: Liu Bochen Inventor after: Song Maosheng Inventor after: Zhang Weidong Inventor after: Zhang Xingyong Inventor after: Wang Jun Inventor after: Gao Sheng Inventor before: The inventor has waived the right to be mentioned |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170324 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: Zibo Power Supply Company of State Grid Shandong Province Electric Power Company Address before: 518000 Guangdong city of Shenzhen province Futian District Fuhua Road No. 6 Building 1403 business tax Applicant before: Liu Chao |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170426 Termination date: 20200310 |