CN104867604A - Medium voltage flame-retardant frequency-conversion power cable - Google Patents
Medium voltage flame-retardant frequency-conversion power cable Download PDFInfo
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- CN104867604A CN104867604A CN201510237795.2A CN201510237795A CN104867604A CN 104867604 A CN104867604 A CN 104867604A CN 201510237795 A CN201510237795 A CN 201510237795A CN 104867604 A CN104867604 A CN 104867604A
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Abstract
The invention relates to a medium voltage flame-retardant frequency-conversion power cable which comprises three cable core wires arranged in parallel and identical in structure. Each cable core wire comprises a circular conductor. A shielding layer, an insulating layer and an insulating shielding layer are arranged outside the conductor in a three-layer co-extrusion manner. The insulating shielding layer is externally covered by an inner layer plastic-aluminum composite belt, an inner copper wire sparse-winding shielding layer, an inner copper-belt wrapping shielding layer and a phase-splitting inner isolating sleeve in sequence. Gaps among the three cable core wires are filled with flame-retardant PP filling ropes and then are externally provided with a cabling layer. The cabling layer is externally covered by an outer layer plastic-aluminum composite belt, an outer copper wire sparse-winding shielding layer and an outer copper-belt wrapping shielding layer in sequence, then an outer isolating sleeve is extruded outside, and aluminum alloy linkage armour serves as the outmost layer for covering. According to the invention, the interference of pulse voltages can be reduced to the lowest level, and the frequency-conversion power cable is enabled to effectively inhibiting the interference of electromagnetic wave.
Description
Technical field
The invention belongs to pressure drag combustion frequency-conversion power cable in power cable technical field, particularly one.
Background technology
Frequency-conversion power cable must have stronger proof voltage impact, can stand pulse voltage during frequency conversion, must have good shielding simultaneously, effectively can eliminate electromagnetic interference, reduces variable-frequency motor noise, ensures system stable operation.The anti-electromagnetic wave interference of frequency-conversion power cable and mechanical protection performance are the key factors affecting cable serviceability, and existing most frequency-changing cable also cannot have excellent anti-electromagnetic wave ability and stronger tension anti-pressure ability simultaneously.
General frequency-conversion power cable internal structure mainly adopts three common master cores and a zero line core to form.But, owing to there is the interference of pulse voltage, namely due in frequency conversion system the frequency-tuning range of variable frequency power supply wider, contain many high order harmonic components, amplitude is also large, this harmonic wave must feed through to cable, likely causes cable breakdown, and the interference that produces of master core and zero line core and harmonic voltage also unbalanced; And there is electromagnetic interference, the cable namely connecting variable frequency power supply is in operation and generates electromagnetic waves, and can produce electromagnetic interference to around neighbouring area, otherwise external electromagnetic ripple also can produce interference to frequency-changing cable.The shielding construction of simultaneously general frequency-conversion power cable is all have employed at the outer wrapped one deck copper strips of cable core, and this kind of cable can reach the electromagnetic interference in certain frequency must shield effectiveness, but its shield effectiveness is very poor in high frequency.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, and propose pressure drag combustion frequency-conversion power cable in one.
The present invention solves its technical problem and takes following technical scheme to realize:
Pressure drag combustion frequency-conversion power cable in one, it is characterized in that: comprise three arranged in parallel and cable heart lines that structure is identical, every bar cable heart line comprises round conductor, three-layer co-extruded technology is adopted outside conductor, extrude screen from inside to outside together, insulating barrier and insulation screen, unlined aluminium plastic composite strip is enclosed with in the outside of insulation screen, cover internal layer copper wire in unlined aluminium plastic composite strip outside to dredge around screen, the internal layer separation sleeve around screen outer wrap internal layer copper strips lapped shielding layer and phase-splitting is dredged at internal layer copper wire, article three, carry out twisted synthesizing cable after all wrapped separation sleeve of cable heart line, the fire-retardant PP gasket for packing in gap is filled, in three cable heart line arranged outside of twisted synthesizing cable by the wrapped stranding layer of fireproof glass strap, outer aluminium-plastic tape is had in stranding layer outer wrap, cover outer copper wire in outer aluminium-plastic tape outside to dredge around screen, dredge around the outer copper strips lapped shielding layer of screen outer wrap at outer copper wire, then outer separation sleeve is extruded in outside, the chain armouring parcel of outermost layer aluminium alloy.
And the described outer copper wire thickness dredged around screen and outer copper strips lapped shielding layer is respectively one times that internal layer copper wire dredges around screen and outer copper strips lapped shielding layer thickness.
And the radius of described round conductor and three-layer co-extruded screen, insulating barrier are identical with the thickness of insulation screen sum.
Advantage of the present invention and good effect are:
1, cable core of the present invention is owing to being three cable heart line structure compositions, because the exchange effect of wire and symmetrical balance thereof, and can by the interference reduction of pulse voltage to floor level; Again due to outer by aluminium-plastic tape, braiding copper wire and the wrapped screen formed of soft copper band at belting layer, frequency-conversion power cable is made can effectively to suppress electromagnetic interference.
2, fire-retardant in the present invention gasket for packing is filled in the middle of three cores in a triangle uniformly, and be twisted into cable core, at the outer plastic-aluminum combined belt of wrapped one deck of cable core, band is wrapped in a screen be made up of braiding copper wire, at the outer wrapped copper strips of screen, the structure of this separated-shielding adds shielding sectional area, and frequency-conversion power cable fail safe is in use improved greatly.
What 3, the present invention adopted at outermost layer is aluminium alloy lock armo structure, meet medium-pressure power cable for armour requirement simultaneously aluminium alloy lock armo serve the effect of shielding, cable is not leaked in magnetic field in conversion power supply engineering, the square wave that frequency converter or variable-frequency motor are operationally produced and high order harmonic component control the inside at cable, reduce the impact on outside precision instrument.Simultaneously aluminium alloy lock armo also has the features such as fire-retardant, lightweight, corrosion-resistant, bending radius is little, stretch-proof, extends the shelf life of cable
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Be further described the invention process below in conjunction with accompanying drawing, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
Pressure drag combustion frequency-conversion power cable in one, as shown in Figure 1, comprise three arranged in parallel and cable heart lines that structure is identical, every bar cable heart line comprises round conductor 1, three-layer co-extruded technology is adopted outside conductor, extrude screen 2 from inside to outside together, insulating barrier 3 and insulation screen 4, unlined aluminium plastic composite strip 5 is enclosed with in the outside of insulation screen, cover internal layer copper wire in unlined aluminium plastic composite strip outside to dredge around screen 6, dredge around screen outer wrap internal layer copper strips lapped shielding layer 7 at internal layer copper wire, with the internal layer separation sleeve 8 of phase-splitting, the structure of this separated-shielding adds shielding sectional area, frequency-conversion power cable fail safe is in use improved greatly, article three, carry out twisted synthesizing cable after all wrapped separation sleeve of cable heart line, the fire-retardant PP gasket for packing 12 in gap is filled, in three cable heart line arranged outside of twisted synthesizing cable by the wrapped stranding layer of fireproof glass strap, outer aluminium-plastic tape 9 is had in stranding layer outer wrap, cover outer copper wire in outer aluminium-plastic tape outside to dredge around screen 10, dredge around the outer copper strips lapped shielding layer 11 of screen outer wrap at outer copper wire, then outer separation sleeve 13 is extruded in outside, the chain armouring 14 of outermost layer aluminium alloy wraps up, the chain armouring of aluminium alloy meets the requirement of medium-pressure power cable for armour, aluminium alloy lock armo serves the effect of shielding simultaneously, cable is not leaked in magnetic field in conversion power supply engineering, the square wave that frequency converter or variable-frequency motor are operationally produced and high order harmonic component control the inside at cable, reduce the impact on outside precision instrument.Simultaneously aluminium alloy lock armo also has the features such as fire-retardant, lightweight, corrosion-resistant, bending radius is little, stretch-proof, extends the shelf life of cable.
In specific embodiment of the invention, the described outer copper wire thickness dredged around screen and outer copper strips lapped shielding layer is respectively one times that internal layer copper wire dredges around screen and outer copper strips lapped shielding layer thickness.
In specific embodiment of the invention, the radius of described round conductor and three-layer co-extruded screen, insulating barrier are identical with the thickness of insulation screen sum, this structure ensure that insulation screen, unlined aluminium plastic composite strip, internal layer copper wire are dredged around screen and the position relationship between internal layer copper strips lapped shielding layer and round conductor, makes the anti-electromagnetic wave interference effect of frequency-conversion power cable reach optimum state.
Claims (3)
1. pressure drag combustion frequency-conversion power cable in a kind, it is characterized in that: comprise three arranged in parallel and cable heart lines that structure is identical, every bar cable heart line comprises round conductor, three-layer co-extruded technology is adopted outside conductor, extrude screen from inside to outside together, insulating barrier and insulation screen, unlined aluminium plastic composite strip is enclosed with in the outside of insulation screen, cover internal layer copper wire in unlined aluminium plastic composite strip outside to dredge around screen, the internal layer separation sleeve around screen outer wrap internal layer copper strips lapped shielding layer and phase-splitting is dredged at internal layer copper wire, article three, carry out twisted synthesizing cable after all wrapped separation sleeve of cable heart line, the fire-retardant PP gasket for packing in gap is filled, in three cable heart line arranged outside of twisted synthesizing cable by the wrapped stranding layer of fireproof glass strap, outer aluminium-plastic tape is had in stranding layer outer wrap, cover outer copper wire in outer aluminium-plastic tape outside to dredge around screen, dredge around the outer copper strips lapped shielding layer of screen outer wrap at outer copper wire, then outer separation sleeve is extruded in outside, the chain armouring parcel of outermost layer aluminium alloy.
2. middle pressure drag combustion frequency-conversion power cable according to claim 1, is characterized in that: the described outer copper wire thickness dredged around screen and outer copper strips lapped shielding layer is respectively one times that internal layer copper wire dredges around screen and outer copper strips lapped shielding layer thickness.
3. middle pressure drag combustion frequency-conversion power cable according to claim 1, is characterized in that: the radius of described round conductor and three-layer co-extruded screen, insulating barrier are identical with the thickness of insulation screen sum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237795.2A CN104867604A (en) | 2015-05-11 | 2015-05-11 | Medium voltage flame-retardant frequency-conversion power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237795.2A CN104867604A (en) | 2015-05-11 | 2015-05-11 | Medium voltage flame-retardant frequency-conversion power cable |
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| Publication Number | Publication Date |
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| CN104867604A true CN104867604A (en) | 2015-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510237795.2A Pending CN104867604A (en) | 2015-05-11 | 2015-05-11 | Medium voltage flame-retardant frequency-conversion power cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297990A (en) * | 2016-09-29 | 2017-01-04 | 山东华东线缆集团有限公司 | Aluminium alloy conductor flexibility resist bending fireproof cable |
| CN114974719A (en) * | 2022-08-02 | 2022-08-30 | 广州南洋电缆集团有限公司 | Medium-voltage flame-retardant power cable and manufacturing method thereof |
Citations (5)
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|---|---|---|---|---|
| US20090056972A1 (en) * | 2007-09-05 | 2009-03-05 | Hew-Kabel/Cdt Gmbh & Co. Kg | Shielded electrical cable for data transmission |
| CN202339749U (en) * | 2011-12-12 | 2012-07-18 | 重庆鸽牌电线电缆有限公司 | Frequency conversion cable |
| CN202632870U (en) * | 2012-06-27 | 2012-12-26 | 安徽龙庵电缆集团有限公司 | Medium-voltage fireproof frequency-conversion electric cable |
| CN102969069A (en) * | 2012-12-10 | 2013-03-13 | 南洋电缆集团有限公司 | Waterproof greasy-dirt-resisting 10 kV middle-voltage transducer cable and method |
| CN203966657U (en) * | 2014-07-01 | 2014-11-26 | 安徽太平洋电缆股份有限公司 | Aluminium alloy core medium voltage frequency converter private cable |
-
2015
- 2015-05-11 CN CN201510237795.2A patent/CN104867604A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090056972A1 (en) * | 2007-09-05 | 2009-03-05 | Hew-Kabel/Cdt Gmbh & Co. Kg | Shielded electrical cable for data transmission |
| CN202339749U (en) * | 2011-12-12 | 2012-07-18 | 重庆鸽牌电线电缆有限公司 | Frequency conversion cable |
| CN202632870U (en) * | 2012-06-27 | 2012-12-26 | 安徽龙庵电缆集团有限公司 | Medium-voltage fireproof frequency-conversion electric cable |
| CN102969069A (en) * | 2012-12-10 | 2013-03-13 | 南洋电缆集团有限公司 | Waterproof greasy-dirt-resisting 10 kV middle-voltage transducer cable and method |
| CN203966657U (en) * | 2014-07-01 | 2014-11-26 | 安徽太平洋电缆股份有限公司 | Aluminium alloy core medium voltage frequency converter private cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297990A (en) * | 2016-09-29 | 2017-01-04 | 山东华东线缆集团有限公司 | Aluminium alloy conductor flexibility resist bending fireproof cable |
| CN114974719A (en) * | 2022-08-02 | 2022-08-30 | 广州南洋电缆集团有限公司 | Medium-voltage flame-retardant power cable and manufacturing method thereof |
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Application publication date: 20150826 |