CN201698822U - Electromagnetic-radiation-resistance variable-frequency power cable - Google Patents
Electromagnetic-radiation-resistance variable-frequency power cable Download PDFInfo
- Publication number
- CN201698822U CN201698822U CN2010201673542U CN201020167354U CN201698822U CN 201698822 U CN201698822 U CN 201698822U CN 2010201673542 U CN2010201673542 U CN 2010201673542U CN 201020167354 U CN201020167354 U CN 201020167354U CN 201698822 U CN201698822 U CN 201698822U
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- layer
- copper
- cable
- conductor
- electromagnetic
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- Expired - Fee Related
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Abstract
The utility model discloses an electromagnetic-radiation-resistance variable-frequency power cable, which comprises a conductor, wherein an insulation layer is coated outside the conductor in an extrusion way for forming insulation wire cores, a layer of polyester belt is wound and coated on a cable formed by a plurality of insulation wire cores, a copper weaving shielding layer and a copper belt shielding layer are sequentially arranged outside the polyester belt, and an outer protective sleeve is coated on the outmost layer in the extrusion way. The utility model adopts a shielding mode of dual total shielding by the copper belt and woven copper wires, effectively solves the problem of uniform zero-sequence resistance inside a three-phase cable, and also shields the interference on the cable per se caused by the external electromagnetic field change.
Description
Technical field
The utility model relates to power cable, specifically is a kind of frequency conversion power cable.
Background technology
The shielding of cable divides two kinds, and a kind of is cable self transmission electric power, and the electromagnetic field that frequency change causes changes, and this electromagnetic field is shielded, and does not cause interference to external world; Another kind is that the electromagnetic field of environment to external world shields, and the operation to cable itself does not produce interference.
Existing shielded type cable core specification is divided two kinds, and a kind of is the 3+3 structure, and a kind of is the 3+1 structure.Shield technology mainly contains 3 kinds: 1) Dan Ping (copper strips)+total (copper strips), 2 of shielding) copper strips always shields 3) the total screen of copper wire braiding.But in some specific occasions, under electromagnetic radiation environment, draw down to the electrical appliance, need the frequency conversion state, adopt the three-phase alternating current transmission of electricity, zero sequence impedance, positive backward conversion from transformer.At this moment, need a kind of frequency-changing cable of otherwise designed to meet the demands.
The utility model content
Technical problem to be solved in the utility model provides the frequency conversion power cable that the bigger occasion of a kind of externally interference of electromagnetic field is used.
The frequency conversion power cable of anti-electromagnetic-radiation described in the utility model, it comprises conductor, outside conductor, extrude a layer insulating and form insulated wire cores, wrapped one deck polyester belt behind some insulated wire cores strandings, set gradually copper woven shield and copper strips screen outside polyester belt, outermost layer extrudes oversheath.
Shielding mode of the present utility model is the dual total shielding of copper strips+establishment copper wire, has effectively solved the inner evenly zero sequence impedance of threephase cable, has also shielded the interference of external electromagnetic field variation to cable itself.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, the three core sector structures that the anti-electromagnetic-radiation frequency conversion power cable of present embodiment adopts, it comprises conductor 1, outside conductor 1, extrude a layer insulating 2 and form insulated wire cores, wrapped one deck polyester belt 3 behind the three eradication edge core strandings, set gradually copper woven shield 4 and copper strips screen 5 outside polyester belt 3, outermost layer extrudes oversheath 6.
The utility model compared with prior art, inner braid plays the effect with the internal electromagnetic field shield, outside copper strips lapping layer plays the effect with the external electromagnetic field shield.Be adapted at external electromagnetic field and disturb bigger occasion.Outer shielding layer also plays the effect of protection zero line.
Technology of the present utility model is:
1, earlier conductor is carried out by wire twisting equipment stranded, 35mm
2And following 7 core circular configurations, the 35mm of adopting
2More than adopt and press sector structure.
2, on conductor, extrude a layer insulating,, then be fit to 70 ℃ of conductor maximum amount fixed temperatures if extrude polyvinyl chloride insulation; If extrude polyethylene insulation, then be fit to 90 ℃ of conductor maximum amount fixed temperatures; If extrude the F46 insulation, then be fit to 200 ℃ of conductor maximum amount fixed temperatures.
3, insulated wire cores is carried out stranding on cabler, and wrapped one deck polyester belt.
4, according to the specification size, braiding one deck copper wire on different braiding machines.
5, wrapped one deck copper strips on the good cable core of braiding.
6, outside copper strips, extrude one deck oversheath.
Claims (1)
1. the frequency conversion power cable of an anti-electromagnetic-radiation, it is characterized in that comprising conductor (1), outside conductor (1), extrude a layer insulating (2) and form insulated wire cores, wrapped one deck polyester belt (3) behind some insulated wire cores strandings, set gradually copper woven shield (4) and copper strips screen (5) outside polyester belt (3), outermost layer extrudes oversheath (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201673542U CN201698822U (en) | 2010-04-21 | 2010-04-21 | Electromagnetic-radiation-resistance variable-frequency power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201673542U CN201698822U (en) | 2010-04-21 | 2010-04-21 | Electromagnetic-radiation-resistance variable-frequency power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201698822U true CN201698822U (en) | 2011-01-05 |
Family
ID=43400069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201673542U Expired - Fee Related CN201698822U (en) | 2010-04-21 | 2010-04-21 | Electromagnetic-radiation-resistance variable-frequency power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201698822U (en) |
-
2010
- 2010-04-21 CN CN2010201673542U patent/CN201698822U/en not_active Expired - Fee Related
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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: 20110105 Termination date: 20170421 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |