CN203644456U - Double shielded variable-frequency cable - Google Patents
Double shielded variable-frequency cable Download PDFInfo
- Publication number
- CN203644456U CN203644456U CN201320790265.7U CN201320790265U CN203644456U CN 203644456 U CN203644456 U CN 203644456U CN 201320790265 U CN201320790265 U CN 201320790265U CN 203644456 U CN203644456 U CN 203644456U
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- CN
- China
- Prior art keywords
- layer
- shield
- double
- frequency
- changing cable
- 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
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- 239000002184 metal Substances 0.000 claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 claims abstract description 38
- 239000004065 semiconductor Substances 0.000 claims abstract description 31
- 239000004020 conductor Substances 0.000 claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 25
- 229910052802 copper Inorganic materials 0.000 claims description 22
- 239000010949 copper Substances 0.000 claims description 22
- 230000004888 barrier function Effects 0.000 claims description 17
- 239000004706 High-density cross-linked polyethylene Substances 0.000 claims description 5
- 229920004932 high density cross-linked polyethylene Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 6
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 239000000945 filler Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- Insulated Conductors (AREA)
- Communication Cables (AREA)
Abstract
The utility model relates to a double shielded variable-frequency cable. The cable comprises insulated cable cores, a filler layer, an inner sheath layer and an outer sheath layer. Each insulated cable core includes intertwisted conductors and an insulating layer. The cable also comprises semiconductor shielding layers and metal shielding layers. The semiconductor shielding layers include inner semiconductor shielding layers and outer semiconductor shielding layers. The metal shielding layers include inner metal shielding layers and an outer metal shielding layer. The cable is effectively reduced in possibility of insulation breakdown. Arrangement of double shielding improves the safety performance of the cable.
Description
Technical field
The utility model relates to a kind of cable, is specifically related to a kind of double shield frequency-changing cable.
Background technology
Along with social development, the progress of science and technology, converter technique is used widely at electromechanics and every profession and trade, and frequency-changing cable consumption is increasing.Cable conductor forms by multiple conducting wires is stranded, and easily forms air gap between insulating barrier, and conductive surface is rough, can cause electric field to concentrate, and causes that the possibility of insulation breakdown occurs between cable core is very large.The pulse voltage of at a high speed frequent frequency conversion causes stronger impact to cable, causes be affected the useful life of frequency-changing cable, has reduced the security performance of cable.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of double shield frequency-changing cable.
For the technical scheme that solves above technical problem employing is:
A kind of double shield frequency-changing cable, it comprises insulated wire cores, packed layer, inner restrictive coating and external sheath layer from the inside to the outside, described insulated wire cores comprises stranded conductor and insulating barrier, also comprise shield semiconductors layer and metal screen layer, described shield semiconductors layer comprises interior shield semiconductors layer and outer semiconductor screen, described interior shield semiconductors layer is arranged between stranded conductor and insulating barrier, and described outer semiconductor screen is arranged at outside insulating barrier;
Described metal screen layer comprises inner metal shield layer and outer metal screen layer, and described inner metal shield layer is arranged between outer semiconductor screen and inner sheath, and described outer metal screen layer is arranged between inner sheath and oversheath.
Further, described inner metal shield layer and outer metal screen layer adopt copper strip shielding.
Preferably, described copper strip shielding is made up of the wrapped soft copper band of a ply.
Preferably, it is wrapped that described copper strip shielding adopts double-deck copper strips gap.
Further preferred, the described copper strip shielding rate of putting up is not less than 15%, and copper strips thickness is 0.1mm.
Further, described inner metal shield layer (5-1) and outer metal screen layer (5-2) adopt copper mesh shielding.
Further, described stranded conductor adopts the copper wire of 7 2.62mm to press circular stranded forming.
Further, described inner sheath is that flame-proof polyvinyl chloride material extrudes and forms.
Further, described insulating barrier is high density cross-linked polyethylene insulating material.
In the utility model, shield semiconductors layer is avoided, between conductor and insulating barrier, partial discharge occurs, and outer semiconductor screen is avoided, between insulating barrier and sheath, partial discharge occurs, and has reduced the possibility of insulation breakdown; The utility model is also provided with metal screen layer, in the time of normal operation, inner metal shield layer and outer metal screen layer pass through capacitance current, in the time that system is short-circuited, as the passage of short circuit current, also play the effect of electric field shielding simultaneously, reduce the possibility of cable core generation insulation breakdown, the security performance that raising cable is set of double shield.The utility model insulating barrier adopts high density crosslinked polyethylene, at special high temperature, in the situation such as heat-resisting, there is stronger non-deformability, high density crosslinked polyethylene is than the polyethylene using in the past, common crosslinked polyethylene adds more organic peroxides, make under HTHP and inert gas environment, with other composition generation chemical reactions, make thermoplasticity become thermosetting, there is splendid electric property, dielectric loss is all less than paper insulation and PVC insulation, use the electric capacity of cable of this material also little, so there is no to reduce charging current and earth fault current in effective star grounding system yet.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In the accompanying drawings, 1, stranded conductor, 2, insulating barrier, 3-1, interior shield semiconductors layer, 3-2, outer semiconductor screen, 4, packed layer, 5-1, inner metal shield layer, 5-2, outer metal screen layer, 6, inner restrictive coating, 7, external sheath layer.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the present embodiment comprises insulated wire cores, packed layer 4, inner restrictive coating 6 and external sheath layer 7 from the inside to the outside, described insulated wire cores comprises stranded conductor 1 and insulating barrier 2, also comprise shield semiconductors layer and metal screen layer, described shield semiconductors layer comprises interior shield semiconductors layer 3-1 and outer semiconductor screen 3-2, described interior shield semiconductors layer 3-1 is arranged between stranded conductor 1 and insulating barrier 2, described outer semiconductor screen 3-2 is arranged at outside insulating barrier 2, interior shield semiconductors thickness is 0.6mm, and outer semiconductor shielding thickness is 0.8mm;
Described metal screen layer comprises inner metal shield layer 5-1 and outer metal screen layer 5-2, described inner metal shield layer 5-1 is arranged between outer semiconductor screen 3-2 and inner sheath 6, described outer metal screen layer 5-2 is arranged between inner sheath 6 and oversheath 7, and described inner metal shield layer 5-1 and outer metal screen layer 5-2 adopt copper strip shielding.
Described copper strip shielding is made up of the wrapped soft copper band of a ply.
The described copper strip shielding rate of putting up is not less than 15%, and copper strips thickness is 0.1mm.
Described stranded conductor 1 adopts the copper wire of 7 2.62mm to press circular stranded forming.
Described inner sheath 6 forms for flame-proof polyvinyl chloride material extrudes.
Described insulating barrier is high density cross-linked polyethylene insulating material.
Oversheath is selected flame-proof polyvinyl chloride material, and oxygen index exceedes 30%.
Filler adopts fire-retardant filling.
While laying, metal is always shielded to two ends reliable ground, when normal operation, stranded conductor maximum temperature is 90 ℃, 250 ℃ of conductor maximum temperatures when short circuit, and maximum length in time is 5S.Environment lays temperature and is not less than 0 ℃; Minimum bending radius while laying is 20 times of the outside diameter of cable.
Claims (9)
1. a double shield frequency-changing cable, it comprises insulated wire cores from the inside to the outside, packed layer (4), inner restrictive coating (6) and external sheath layer (7), described insulated wire cores comprises stranded conductor (1) and insulating barrier (2), it is characterized in that: also comprise shield semiconductors layer and metal screen layer, described shield semiconductors layer comprises interior shield semiconductors layer (3-1) and outer semiconductor screen (3-2), described interior shield semiconductors layer (3-1) is arranged between stranded conductor (1) and insulating barrier (2), described outer semiconductor screen (3-2) is arranged at outside insulating barrier (2),
Described metal screen layer comprises inner metal shield layer (5-1) and outer metal screen layer (5-2), described inner metal shield layer (5-1) is arranged between outer semiconductor screen (3-2) and inner sheath (6), and described outer metal screen layer (5-2) is arranged between inner sheath (6) and oversheath (7).
2. a kind of double shield frequency-changing cable according to claim 1, is characterized in that: described inner metal shield layer (5-1) and outer metal screen layer (5-2) adopt copper strip shielding.
3. a kind of double shield frequency-changing cable according to claim 2, is characterized in that: described copper strip shielding is made up of the wrapped soft copper band of a ply.
4. a kind of double shield frequency-changing cable according to claim 2, is characterized in that: described copper strip shielding adopts double-deck copper strips gap wrapped.
5. according to a kind of double shield frequency-changing cable described in claim 2-4 any one, it is characterized in that: the described copper strip shielding rate of putting up is not less than 15%, copper strips thickness is 0.1mm.
6. a kind of double shield frequency-changing cable according to claim 1, is characterized in that: described inner metal shield layer (5-1) and outer metal screen layer (5-2) adopt copper mesh shielding, and described copper mesh shielding thickness is 0.075mm.
7. a kind of double shield frequency-changing cable according to claim 1, is characterized in that: described stranded conductor (1) adopts the copper wire of 7 2.62mm to press circular stranded forming.
8. a kind of double shield frequency-changing cable according to claim 1, is characterized in that: described inner sheath (6) forms for flame-proof polyvinyl chloride material extrudes.
9. a kind of double shield frequency-changing cable according to claim 1, is characterized in that: described insulating barrier (2) is high density cross-linked polyethylene insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320790265.7U CN203644456U (en) | 2013-12-05 | 2013-12-05 | Double shielded variable-frequency cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320790265.7U CN203644456U (en) | 2013-12-05 | 2013-12-05 | Double shielded variable-frequency cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203644456U true CN203644456U (en) | 2014-06-11 |
Family
ID=50875682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320790265.7U Expired - Fee Related CN203644456U (en) | 2013-12-05 | 2013-12-05 | Double shielded variable-frequency cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203644456U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128606A (en) * | 2016-08-30 | 2016-11-16 | 无锡江南电缆有限公司 | A kind of crosslinked polyetylene insulated waterproof Anti-termite power cable of copper core |
| CN107037310A (en) * | 2017-05-27 | 2017-08-11 | 重庆渝丰鑫新线缆科技有限公司 | The cable and its detecting system and detection method of breaking point detection can be carried out |
-
2013
- 2013-12-05 CN CN201320790265.7U patent/CN203644456U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128606A (en) * | 2016-08-30 | 2016-11-16 | 无锡江南电缆有限公司 | A kind of crosslinked polyetylene insulated waterproof Anti-termite power cable of copper core |
| CN107037310A (en) * | 2017-05-27 | 2017-08-11 | 重庆渝丰鑫新线缆科技有限公司 | The cable and its detecting system and detection method of breaking point detection can be carried out |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140611 |