CN105551673B - Manufacturing method of heavy current-carrying power cable - Google Patents
Manufacturing method of heavy current-carrying power cable Download PDFInfo
- Publication number
- CN105551673B CN105551673B CN201610114374.5A CN201610114374A CN105551673B CN 105551673 B CN105551673 B CN 105551673B CN 201610114374 A CN201610114374 A CN 201610114374A CN 105551673 B CN105551673 B CN 105551673B
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- China
- Prior art keywords
- layer
- spiral
- power cable
- electric wire
- spiral layer
- 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.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 44
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 238000004544 sputter deposition Methods 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 114
- 239000012528 membrane Substances 0.000 claims description 18
- 230000006698 induction Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 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
- 239000003973 paint Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000002955 isolation Methods 0.000 abstract 2
- 238000002791 soaking Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000006467 substitution reaction 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
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, is to be related to a kind of big current-carrying power cable.
【Background technology】
In power cable field, especially for the electric wire with information spreading function, in order to prevent the interference in the external world,
Also for the radiation leakage for suppressing core, the outside parcel at least one of which metal screen layer in core is generally required for；By screen
The setting of layer is covered, the current signal that the environmental electromagnetic wave of outside is had influence in core can be effectively prevented, core is decreased
Middle alternating current to external radiation.
This kind of screen layer mainly has two kinds, and a kind of is the silk screen being interwoven by tinsel, and another kind is tubular metal
Thin-walled；In fact, for metal gauze, being also equivalent to the tubular metal thin-walled that surface is covered with through hole.For above-mentioned screen layer,
The subject matter of presence is that the alternating current in core will go out vortex flow in screen layer surface induction, due to this kind of vortex flow
Exist so that the current-carrying capacity of electric wire is limited by very large, and current-carrying capacity is bigger, then eddy-current loss is bigger；Therefore, current screen
Electric wire is covered, line loss is larger during current-carrying.
【The content of the invention】
For the problems referred to above, it is an object of the invention to provide a kind of big current-carrying power cable, the power cable is not
Only there is good shielding action, and there is less eddy-current loss, be adapted to big current-carrying operation.
The technical solution adopted for the present invention to solve the technical problems is：The power cable from the inside to the outside include core,
Inner insulating layer, screen layer, protective layer；The screen layer is divided into three layers, is respectively interior spiral layer, isolating membrane, outer spiral shell from the inside to the outside
Line layer；The interior spiral layer, outer helical layer surface have in straight spiral metal path, the straight spiral metal path
With clearance for insulation between adjacent turn, the insulating voids between the metal path of the interior spiral layer, in radial directions just
Metal path just to the outer spiral layer.
Preferably, the interior spiral layer, outer helical layer surface just have one piece of conductive contact surfaces every a segment distance, it is each interior
On spiral layer, outer spiral layer, the corresponding conductive contact surfaces are contacted with each other by the cut on the isolating membrane；So that
On interior spiral layer, outer spiral layer each produced by, the induction electromotive force with identical Direction of circulation cancel out each other, this is further
The small vortex flow on spiral metal path is eliminated, the line loss of electric wire is further reduced.
Preferably, the isolating membrane is made up of insullac, its thickness is 0.2mm～0.5mm, makes interior spiral layer, outer spiral shell
Line layer keeps nearer distance, so that the induction electromotive force on interior spiral layer, outer spiral layer is almost equal.
Preferably, the width of each circle of metal path is every slightly larger than metal path on interior spiral layer on the outer spiral layer
The width of one circle, so that the slightly above interior spiral layer of the electric induction ability of metal path on outer spiral layer, to make up outer spiral layer
Offline core difference farther out.
Present invention also offers a kind of manufacture method of the power cable, the manufacture method comprises the steps：
First, make core by the feed reservoir of the inner insulating layer under molten condition, and extrude via extruder, formed by
The electric wire that core, inner insulating layer are constituted；
2nd, in modes such as sputtering, sprayings, layer of metal film is coated on the inner insulating layer surface；
3rd, pulling wire direct join is continuously rotated using lathe, it is then continuous along electric wire using the cutting knife with one fixed width
Walking, so as to cut out spiral metal path, forms the interior spiral layer；
4th, in the way of coating or oil immersion, the isolating membrane is formed outside the interior spiral layer；
5th, imitate step 2, three, form the outer spiral layer in the isolating membrane appearance；
6th, the electric wire comprising core, inner insulating layer, screen layer is made by the raw material of the protective layer under molten condition
Pond, and extrude via extruder, form the big current-carrying power cable.
Preferably, in step 3, the tool-holder for cutting knife described in clamping is provided with stress induction piece, the stress
It is to sense the radial force of cutting knife that the installation site of sensing chip is required；And the tool-holder to knife depth by electric
Module is controlled, and the electrical module gives knife depth according to the radial force of the cutting knife regulation tool-holder, makes cutting knife
Radial force remains constant.
The beneficial effects of the present invention is：The big current-carrying power cable is in current-carrying, produced on the arbitrfary point of core
Radiation, described in radial direction directive in spiral layer when, or being captured by the metal path of interior spiral layer, or continuing outwards to throw
Penetrate, captured by the metal path of outer spiral layer, so as to external environment radiate again；Equally, the interference letter of external environment condition
Number also cannot be introduced into core；And after being captured by the metal path of the interior spiral layer or outer spiral layer, due to metal path substantially
On be no large-area continuous surface in wire, therefore, the generation of vortex is greatly limited, in interior spiral layer and
Outer helical layer surface only exists small vortex；Something which increases the current capacity of electric wire.
【Description of the drawings】
Fig. 1 is the cross-sectional view of this big current-carrying power cable.
Fig. 2 is the partial enlarged drawing of I parts in Fig. 1.
During Fig. 3 is this big current-carrying power cable, interior spiral layer, the contrast schematic diagram of one embodiment of outer spiral layer.
【Specific embodiment】
The present invention is further described with reference to the accompanying drawings and examples：
As shown in Figure 1 and Figure 2, the power cable includes core 1, inner insulating layer 2, screen layer 3, protective layer from the inside to the outside
4。
3 points of the screen layer is three layers, is respectively interior spiral layer 31, isolating membrane 30, outer spiral layer 32 from the inside to the outside；It is described
Interior spiral layer 31,32 surface of outer spiral layer have in straight spiral metal path, the straight spiral metal path it is adjacent
There is between circle clearance for insulation；As shown in figure 3, the insulating voids 310 between the metal path 311 of the interior spiral layer 31,
Just metal path 321 just to the outer spiral layer 32 in the radial direction；Equally, the metal path of the outer spiral layer 32
Insulating voids 320 between 321, in radial directions metal path 311 just just to the interior spiral layer 31.
The isolating membrane 30 is made up of insullac, and its thickness is 0.2mm～0.5mm, makes interior spiral layer 31, outer spiral layer 32
Nearer distance is kept, so that the induction electromotive force on interior spiral layer 31, outer spiral layer 32 is almost equal.
Above-mentioned big current-carrying power cable in current-carrying, the radiation produced by the arbitrfary point of core 1, described in radial direction directive
During interior spiral layer 31, or being captured by the metal path 311 of interior spiral layer 31, or continuing outwards to project, by outer spiral layer
32 metal path 321 is captured, so as to external environment radiate again；Equally, the interference signal of external environment condition also cannot
Into core 1；And after being captured by the metal path 311,321 of the interior spiral layer 31 or outer spiral layer 32, due to metal path
Generally it is no large-area continuous surface in wire, therefore, the generation of vortex is greatly limited, in interior helical
Layer and outer helical layer surface only exist small vortex；Something which increases the current capacity of electric wire.
In addition, in the embodiment shown in fig. 3, the interior spiral layer 31,32 surface of outer spiral layer every a segment distance just
There are one piece of conductive contact surfaces 312,322, the corresponding conductive contact surfaces pass through institute on each interior spiral layer 31, outer spiral layer 32
The cut stated on isolating membrane 30 contacts with each other；So that on interior spiral layer 31, outer spiral layer 32 each produced by, with identical
The induction electromotive force of Direction of circulation, as Fig. 3 bend arrows are illustrated, cancels out each other, and this further obviates spiral metal road
Small vortex flow on footpath, makes the line loss of electric wire further reduce.
For above-mentioned power cable, its manufacture can be carried out in accordance with the following steps：
First, make core by the feed reservoir of the inner insulating layer under molten condition, and extrude via extruder, formed by
The electric wire that core, inner insulating layer are constituted；
2nd, in modes such as sputtering, sprayings, layer of metal film is coated on the inner insulating layer surface；
3rd, pulling wire direct join is continuously rotated using lathe, it is then continuous along electric wire using the cutting knife with one fixed width
Walking, so as to cut out spiral metal path, forms the interior spiral layer；
4th, in the way of coating or oil immersion, the isolating membrane 30 is formed outside the interior spiral layer；Also, in correspondence
Where the conductive contact surfaces 312,322, isolating membrane 30 is broken, form cut；
5th, imitate step 2, three, form the outer spiral layer in the isolating membrane appearance；
6th, the electric wire comprising core, inner insulating layer, screen layer is made by the raw material of the protective layer under molten condition
Pond, and extrude via extruder, form the big current-carrying power cable.
Furthermore, it is contemplated that wire body is flexible, even if being stretched so as to tighten, its surface is being cut
When, it is also difficult to as rigid body, make wire body invariance；Therefore, it can set on for the tool-holder of cutting knife described in clamping
Stress induction piece is put, the installation site of the stress induction piece requires it is to sense the radial force of cutting knife；And the knife
Tool folder to knife depth by electrical module control, the electrical module adjusts the tool-holder according to the radial force of the cutting knife
Give knife depth, make cutting knife radial force maintain it is constant；So, as interior spiral layer, outer spiral layer metal film on surface are broken
Radial pressure needed for bad is basicly stable, even if electric wire deformation, the radial pressure destroyed needed for metal film is substantially not yet
Become, therefore, by stress induction piece and controllable tool-holder, you can ensure that metal film is reliably cut, and the inner insulating layer,
Isolating membrane is then unaffected.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (3)
1. a kind of manufacture method of big current-carrying power cable, the power cable include core, inner insulating layer, screen from the inside to the outside
Layer, protective layer are covered, the screen layer of the cable for producing is divided into three layers, be respectively interior spiral layer, isolating membrane, outer spiral shell from the inside to the outside
Line layer；The interior spiral layer, outer spiral layer have in spiral metal path, the adjacent turn of the spiral metal path it
Between there are insulating voids, the insulating voids between the metal path of the interior spiral layer, in radial directions just just to described
The metal path of outer spiral layer；The interior spiral layer, outer helical layer surface just have one piece of conductive contact surfaces every a segment distance, respectively
On interior spiral layer, outer spiral layer, the corresponding conductive contact surfaces are contacted with each other by the cut on the isolating membrane, described
Width of the width of each circle of metal path more than each circle of metal path on interior spiral layer on outer spiral layer, it is characterised in that：
The manufacture method comprises the steps：
First, core is made by the feed reservoir of the inner insulating layer under molten condition, and extruded via extruder, formed by line
The electric wire that core, inner insulating layer are constituted；
2nd, with sputtering or spraying method, layer of metal film is coated on the inner insulating layer surface；
3rd, pulling wire direct join is continuously rotated using lathe, then using the cutting knife with one fixed width along electric wire continuous walking,
So as to cut out spiral metal path, interior spiral layer is formed；
4th, in the way of coating or oil immersion, isolating membrane is formed outside the interior spiral layer, also, corresponding to the conduction
Where contact surface, isolating membrane is broken, form cut；
5th, imitate step 2, three, form outer spiral layer in the isolating membrane appearance；
6th, the electric wire comprising core, inner insulating layer, screen layer is made by the feed reservoir of the protective layer under molten condition, and
Extrude via extruder, form the big current-carrying power cable.
2. the manufacture method of big current-carrying power cable according to claim 1, it is characterised in that：In step 3, use
Be provided with stress induction piece in the tool-holder of cutting knife described in clamping, the installation site of the stress induction piece require be, Ke Yichuan
Feel the radial force of cutting knife；And the tool-holder to knife depth by electrical module control, the electrical module is according to described
What the radial force of cutting knife adjusted the tool-holder gives knife depth, makes the radial force of cutting knife remain constant.
3. the manufacture method of big current-carrying power cable according to claim 1, it is characterised in that：The isolating membrane is by exhausted
Edge paint is constituted, and its thickness is 0.2mm～0.5mm.
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 CN105551673A (en) | 2016-05-04 |
| CN105551673B true CN105551673B (en) | 2017-04-26 |
Family
ID=50707774
Family Applications (3)
| 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 |
| CN201610114374.5A Expired - Fee Related CN105551673B (en) | 2014-03-10 | 2014-03-10 | Manufacturing method of heavy current-carrying power cable |
Family Applications Before (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) | CN105609201B (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 CN201610025820.5A patent/CN105609201B/en active Active
- 2014-03-10 CN CN201410083592.8A patent/CN103811128B/en not_active Expired - Fee Related
- 2014-03-10 CN CN201610114374.5A patent/CN105551673B/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 |
|---|---|
| CN105609201B (en) | 2017-07-14 |
| CN103811128A (en) | 2014-05-21 |
| CN105609201A (en) | 2016-05-25 |
| CN105551673A (en) | 2016-05-04 |
| CN103811128B (en) | 2016-04-20 |
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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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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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