CN202871391U - Three-core type frequency conversion power cable - Google Patents
Three-core type frequency conversion power cable Download PDFInfo
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- CN202871391U CN202871391U CN 201220490800 CN201220490800U CN202871391U CN 202871391 U CN202871391 U CN 202871391U CN 201220490800 CN201220490800 CN 201220490800 CN 201220490800 U CN201220490800 U CN 201220490800U CN 202871391 U CN202871391 U CN 202871391U
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Abstract
The utility model discloses a three-core type frequency conversion power cable. The three-core type frequency conversion power cable comprises three conductors, wherein each conductor is a round pressed copper conductor formed by twisting and pressing a plurality of copper wires using an alloy wire as the center, the outer part of each conductor is sequentially coated with a conductor shielding layer, a silicon rubber insulation layer, an insulation shielding layer, a metal shielding layer and an isolation layer, the cross sections of the three conductors coated with the isolation layers are distributed in the triangle shape and the three conductors form a cable core, the outer part of the cable core is coated with a composite lapping layer, and the composite lapping layer is sequentially provided with an electrostatic shielding layer and a waterproof layer formed by lapping a waterproof tape from the inside to the outside, and the outer part of the composite lapping layer is sequentially coated with an armour layer and an outer jacket layer. The structure design of the power cable is reasonable, and by the special structure design including the multiple shielding layers and the armour layer, the problem of a main loop power cable of an intermediate frequency conversion motor or a frequency converter that the square wave or higher harmonic wave generated during electric energy transmission is not leaked outside is solved. Moreover the cable has the good waterproof performance.
Description
Technical field:
The utility model relates to power cable, relates in particular to a kind of three-hole frequency-conversion power cable.
Background technology:
Along with the increase of commercial power load and large industrial enterprise automaticity improve constantly, low-carbon environment-friendly, energy-saving and cost-reducing become thematic today, a large amount of uses of big-power transducer and variable-frequency motor and various precision instruments, the main circuit power cable that connects frequency converter or variable-frequency motor produces square wave and high order harmonic component in the process of electric energy transmitting, thereby affects other precision instrument normal operation.
For fear of the impact on other precision instrument of square wave and high order harmonic component, the square wave and the high order harmonic component that just require power cable to produce when electric energy transmitting can not leak, and in addition, the water resistance of cable is relatively poor, and actual use procedure is relatively relatively poor.
The utility model content:
The purpose of this utility model provides a kind of three-hole frequency-conversion power cable, reasonable in design, when improving water resistance, effectively solved square wave that the main circuit power cable of variable-frequency motor or frequency converter produces when electric energy transmitting and high order harmonic component do not leak problem.
The technical solution of the utility model is as follows:
The three-hole frequency-conversion power cable, comprise three conductors, it is characterized in that: described three conductors adopt many copper cash to press the circular copper conductor that presses through stranded centered by B alloy wire, three conductors are coated with conductor shield outward successively, silicone rubber insulation layer, insulation screen, metal screen layer, separator, three cross-sectional area of conductor behind the coating separator are the isosceles triangle distribution and consist of cable core, cable core is coated with compound lapping layer, compound lapping layer is provided with the electrostatic screen layer from inside to outside successively, the watertight composition of the wrapped formation of water blocking tape, compound lapping layer are provided with armour outward successively, external sheath layer.
Described three-hole frequency-conversion power cable is characterized in that: also be provided with waterproof paste and ceramic magnesium oxide powder between described cable core and the compound lapping layer and mix the packed layer that consists of, also be provided with tensile core in the packed layer.
The utility model has the advantages that:
1, metal screen layer is changed into copper wire and twine shielding construction, can satisfy high-tension cable uniform electric field and grounding requirement, can play the electrostatic screen effect again, make cable electric field in the conversion power supply engineering not leak to improve power supply quality.
2, set up one deck separator outside metal screen layer, having made electrostatic screen do the time spent does not affect mutually, and structure is more stable.
3, the electrostatic screen layer is set outside cable core, cable electric field in the conversion power supply engineering is not leaked.
Description of drawings:
Fig. 1 is structural representation of the present utility model.
Embodiment:
Referring to Fig. 1:
The three-hole frequency-conversion power cable, comprise three conductors 1, three conductors 1 adopt many copper cash to press the circular copper conductor that presses through stranded centered by B alloy wire 2, three conductor 1 outer conductor shields 3 that are coated with successively, silicone rubber insulation layer 4, insulation screen 5, metal screen layer 6, separator 7, three conductor 1 cross sections behind the coating separator 7 are the isosceles triangle distribution and consist of cable core, cable core is coated with compound lapping layer 8, compound lapping layer 8 is provided with electrostatic screen layer 8-1 from inside to outside successively, the watertight composition 8-2 of the wrapped formation of water blocking tape, the compound lapping layer 8 outer armours 9 that are provided with successively, external sheath layer 10.
Also be provided with waterproof paste and ceramic magnesium oxide powder between cable core and the compound lapping layer 8 and mix the packed layer 11 that consists of, also be provided with tensile core 12 in the packed layer 11, the waterproof heat-resisting performance obviously improves, and structural compactness is strengthened.
Armour 9 adopts braided steel wire to consist of, count is not less than 85%, has both satisfied the needs of the armouring of midium voltage cable, can play the magnetic shielding effect again, cable is not leaked in magnetic field in the conversion power supply engineering, and electrostatic screen layer 7 does not leak cable electric field in the conversion power supply engineering.
Claims (2)
1. three-hole frequency-conversion power cable, comprise three conductors, it is characterized in that: described three conductors adopt many copper cash to press the circular copper conductor that presses through stranded centered by B alloy wire, three conductors are coated with conductor shield outward successively, silicone rubber insulation layer, insulation screen, metal screen layer, separator, three cross-sectional area of conductor behind the coating separator are the isosceles triangle distribution and consist of cable core, cable core is coated with compound lapping layer, compound lapping layer is provided with the electrostatic screen layer from inside to outside successively, the watertight composition of the wrapped formation of water blocking tape, compound lapping layer are provided with armour outward successively, external sheath layer.
2. three-hole frequency-conversion power cable according to claim 1 is characterized in that: also be provided with waterproof paste between described cable core and the compound lapping layer and ceramic magnesium oxide powder mixes the packed layer that consists of, also be provided with tensile core in the packed layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220490800 CN202871391U (en) | 2012-09-21 | 2012-09-21 | Three-core type frequency conversion power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220490800 CN202871391U (en) | 2012-09-21 | 2012-09-21 | Three-core type frequency conversion power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202871391U true CN202871391U (en) | 2013-04-10 |
Family
ID=48038088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220490800 Expired - Fee Related CN202871391U (en) | 2012-09-21 | 2012-09-21 | Three-core type frequency conversion power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202871391U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103325481A (en) * | 2013-06-25 | 2013-09-25 | 江苏红峰电缆集团有限公司 | High-tensile multi-core rubber sleeve cable |
| CN107369496A (en) * | 2017-08-22 | 2017-11-21 | 贵州固达电缆有限公司 | A kind of water-proof cable |
-
2012
- 2012-09-21 CN CN 201220490800 patent/CN202871391U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103325481A (en) * | 2013-06-25 | 2013-09-25 | 江苏红峰电缆集团有限公司 | High-tensile multi-core rubber sleeve cable |
| CN107369496A (en) * | 2017-08-22 | 2017-11-21 | 贵州固达电缆有限公司 | A kind of water-proof cable |
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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: 20130410 Termination date: 20150921 |
|
| EXPY | Termination of patent right or utility model |