CN103714902A - Special-structure environment-friendly power cable for transformer connection - Google Patents
Special-structure environment-friendly power cable for transformer connection Download PDFInfo
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- CN103714902A CN103714902A CN201410016108.XA CN201410016108A CN103714902A CN 103714902 A CN103714902 A CN 103714902A CN 201410016108 A CN201410016108 A CN 201410016108A CN 103714902 A CN103714902 A CN 103714902A
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Abstract
The invention relates to a special-structure environment-friendly power cable for transformer connection and belongs to the field of power transmission. The special-structure environment-friendly power cable is characterized by consisting of a composite structure filling core, a concentric conductor, an XLPE insulating layer, a composite shielding layer and a low-smoke zero-halogen sheath, wherein the composite structure filling core is located at the central position of the cable, and the concentric conductor, the XLPE insulating layer, the composite shielding layer and the low-smoke zero-halogen sheath are sequentially arranged outside layer by layer. The composite structure filling core is made from a Kevlar fiber extruded 150DEG C environment-friendly polyolefin material. The concentric conductor and the composite shielding layer are made from sparsely-wound annealing flexible copper wires and wrapped annealing flexible copper belts. The XLPE insulating layer is made from an environment-friendly cross linked polyethylene insulating material. The low-smoke zero-halogen sheath is made from a 90 DEG C environment-friendly polyolefin material. The special-structure environment-friendly power cable is reasonable in structural design and has the advantages of reducing conductor skin effect, effectively improving the cross-section utilization rate and heat radiation performance and being good in shielding performance, flame-retarding, environment-friendly and the like.
Description
Technical field
The present invention relates to a kind of power cable, be specially a kind of transformer and connect with unique construction LSOH anti-flaming crosslinked polyethylene insulating layer and thermoplastic low smoke and zero halogen sheath environment-friendly type power cable, be particularly useful for 12/20kV and above power cable.
Background technology
Traditional transformer connects and all by pressing circular copper conductor or aluminium conductor, forms with the conductor structure of medium-pressure power cable, and conductor adopts share split stranded, then presses moulding.This technique conductor adopts and presses moulding, but due to the impact of technological level and copper conductor self character, conductive surface always more or less there is burr.In order to eliminate the impact of this burr on the construction of cable, traditional handicraft extrudes the semiconductive crosslinked polyethylene of one deck at conductive surface, forms balanced current potential, to eliminate the impact of burr.Although traditional handicraft has adopted share split stranded, presses moulding, due to the existence of conductor kelvin effect, make conductor boundary utilance overall or on the low side.Owing to will extruding semiconductive crosslinked polyethylene, cause the waste of resource in addition.
Summary of the invention
The object of this invention is to provide a kind of employing concentric conductor, the non-structure of pressing, perfect heat-dissipating, advantages of good shielding performance, conductor actual cross-section utilance high LSOH anti-flaming environment-friendly power cable.
Technical scheme: for addressing the above problem, the power cable that the technical solution used in the present invention is unique construction, is characterized in: formed by composite construction filled core, concentric conductor, XLPE insulating barrier, composite shielding layer and low smoke and zero halogen sheath.In structure, composite construction filled core is positioned at the center of cable, and concentric conductor, XLPE insulating barrier, composite shielding layer and low smoke and zero halogen sheath are with this outside successively.
The material that composite construction filled core of the present invention adopts is: by Kafra fiber, do strengthening core, extrude the environmental-protection low-smoke halogen-free flame retardant polyolefine material (, the temperature resistant grade of raising filled core three-layer co-extruded for adapting to) of 150 ℃ of temperature resistant grades.After this composite construction is extruded, need to be through the irradiation of 15Mrad, for strengthening the mechanical strength of this composite structure.The area of this composite construction filled core and structure are adjusted accordingly according to different electric pressures and specification.50 of 12/20kV squares of conductors for example, its structure is: after the Kafra fibers of 10 1000 loads are stranded, extrude the filled core that area is 165mm2.
Concentric conductor of the present invention adopts composite construction, and its material is: naked soft circular copper wire and performance that performance meets the conductor > > requirement of latest national standards GB/T 3956-2008 < < cable meet the soft copper band that latest national standards GB/T 11091-2005 < < copper strip for electric cable > > requires.The thickness of the diameter of naked soft circular copper wire and radical and copper strips and width are determined according to concrete interface.For example the concentric conductor of 50mm2 adopts: 50 copper cash, and copper wire diameter 1.4mm, copper strips thickness 0.1mm, copper strips width 45mm, the copper strips rate of putting up is more than 25%.
XLPE insulating layer material of the present invention is environment-friendly type crosslinkable polyethylene Insulation Material, and crosslinking method is chemical crosslinking.Extrusion way adopts catenary suspension type continuous vulcanization three-layer co-extruded.Extrude rear employing test heat and extend the control degree of cross linking, control range is: 70% ~ 110%.The thickness of XLPE insulation adjusts according to different electric pressures and specification.50 of 12/20kV squares of conductors for example, its insulation thickness is the 5.5mm that 7.0mm(is better than the requirement of national standard), its Main Function is to guarantee that cable can bear the instantaneous pressure electric current that transformer produces.
Composite shielding layer of the present invention adopts composite construction, and its material is identical with concentric conductor of the present invention with structure.Its structure adjusts according to different electric pressures and specification, 50 of 12/20kV squares of conductors for example, and its structure is: 80 copper cash, copper wire diameter 0.9mm.
Low smoke and zero halogen sheath material of the present invention adopts the environment-protecting thermoplastic low-smoke halide-free fireproof composite polyolefine material of 90 ℃ of temperature resistant grades.Its thickness takes advantage of 0.035 for extruding front external diameter, then adds 1.
The present invention compared with the existing technology has the following advantages: conductor of the present invention adopts annealed copper wire to add the composite construction of copper strips, and copper strip surface is smooth, does not need to press, and avoids the conductor burr producing because press.Concentric conductor of the present invention is dredged on the filled core of composite construction, because conductor adopts concentric structure, has greatly improved the contact area of same size conductor and insulating barrier, improved cable radiating effect and ampacity.For example: traditional 50mm2 conductor, its circular cross-section is amassed as 50mm2, and adopts this structure, and its circular area can reach the effect of 170mm2.With the conductor of same size, due to the special construction of concentric conductor, kelvin effect is reduced greatly, effectively raise conductor actual cross-section utilance.It is wrapped around adding copper strips that screen adopts copper wire to dredge, and wrapped the comparing of single copper strips with traditional, has increased cable shield effect.In addition, material of the present invention all adopts ep-type material from inside to outside, and material all meets the requirement of RoHS2.0.This not only makes this cable more meet the demand in client and market, simultaneously for enterprise has created good economic benefit.
Accompanying drawing explanation
Fig. 1 is construction of cable schematic diagram of the present invention.
Embodiment
Below in conjunction with example, the present invention is described in further detail.
As shown in Figure 1, the present embodiment has been described a kind of transformer and has been connected that to use unique construction environment-friendly type power cable, the electric pressure of this cable be that 12/20kV nominal area of section is 50mm2.This transformer connects uses unique construction environment-friendly type power cable, is respectively from inside to outside: composite construction filled core 1, concentric conductor 2, XLPE insulating barrier 3, composite shielding layer 4, low smoke and zero halogen sheath 5.Described filled core is positioned at the center of cable, and concentric conductor, XLPE insulating barrier, composite shielding layer and low smoke and zero halogen sheath are with this outside successively.Wherein composite construction filled core 1 adopts the Kafra fiber of 10 1000 loads to extrude the environmental-protection low-smoke halogen-free flame retardant polyolefine material of 150 ℃ of temperature resistant grades, and extruding external diameter is 14.5mm.After extruding, this composite filled core is through the irradiation of 15Mrad, for strengthening the mechanical strength of this composite structure.Concentric conductor 2 adopts 50 soft circular copper wires of annealing that filament diameter is 1.4mm, copper strips thickness 0.1mm, and copper strips width 45mm, the copper strips rate of putting up is 25%, the overall electrical resistance of this structure requires to be less than 0.387 Ω/km.XLPE insulating barrier 3 adopts environment-friendly type crosslinkable polyethylene Insulation Material.Composite shielding layer 4 adopts 80 annealed copper lines that brass wire diameter is 0.9mm.Low smoke and zero halogen sheath 5 materials adopt the environment-protecting thermoplastic low-smoke halide-free fireproof composite polyolefine material of 90 ℃ of temperature resistant grades, and thickness is 2.5mm.
To those skilled in the art, everyly according to the present invention, conceive equivalence that described structure and feature make or simple change (such as changing the material of filled core or external diameter size etc.), be all included in protection scope of the present invention.
Claims (5)
1. a unique construction environment-friendly type power cable is used in transformer connection, is characterized in: composite construction filled core, concentric conductor, XLPE insulating barrier, composite shielding layer and low smoke and zero halogen sheath, consist of.
2. according to claim 1, it is characterized in that: composite construction filled core is positioned at the center of cable, concentric conductor, XLPE insulating barrier, composite shielding layer and low smoke and zero halogen sheath are with this outside successively.
3. according to claim 1, it is characterized in that: described composite construction filled core is done strengthening core by Kafra fiber, the environmental-protection low-smoke halogen-free flame retardant polyolefine material that extrudes 150 ℃ of temperature resistant grades forms, after composite construction filled core is extruded, through the cross-linking radiation of 15Mrad, in order to improve the mechanical strength of composite construction filled core.
4. according to claim 1, it is characterized in that: described concentric conductor and composite shielding layer are to be dredged around composite construction filled core by the soft circular copper wire of annealing, and then wrapped annealed copper band forms.
5. according to claim 1, it is characterized in that: XLPE insulating barrier adopts environment-friendly type crosslinkable polyethylene Insulation Material, and low smoke and zero halogen sheath adopts the environment-protecting thermoplastic low-smoke halide-free fireproof composite polyolefine material of 90 ℃ of temperature resistant grades.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410016108.XA CN103714902A (en) | 2014-01-14 | 2014-01-14 | Special-structure environment-friendly power cable for transformer connection |
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| CN201410016108.XA CN103714902A (en) | 2014-01-14 | 2014-01-14 | Special-structure environment-friendly power cable for transformer connection |
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| CN103714902A true CN103714902A (en) | 2014-04-09 |
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| CN201410016108.XA Pending CN103714902A (en) | 2014-01-14 | 2014-01-14 | Special-structure environment-friendly power cable for transformer connection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107301902A (en) * | 2017-06-23 | 2017-10-27 | 安徽华上电缆科技有限公司 | A kind of heat dissipation type high computer cable |
| CN108695028A (en) * | 2018-06-19 | 2018-10-23 | 广东朝阳电子科技股份有限公司 | A kind of anti-elater promotion preformed technique of pulling force |
| CN109585071A (en) * | 2018-12-14 | 2019-04-05 | 明达线缆集团有限公司 | A kind of resistance to lightning impulse thunder-lightning cable and preparation method |
| CN114141422A (en) * | 2020-09-03 | 2022-03-04 | 深圳市东佳信电线电缆有限公司 | Special structure environment-friendly power cable for transformer connection |
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| CN1503977A (en) * | 2000-06-28 | 2004-06-09 | Ƥ��������άϵͳ����˾ | Cable with recyclable covering |
| CN2762297Y (en) * | 2005-08-03 | 2006-03-01 | 宝丰电缆有限公司 | Power cable for rated voltage 0.6/1kV frequency changer circuit |
| CN2842669Y (en) * | 2005-10-21 | 2006-11-29 | 大庆油田昆仑集团有限公司 | The frequency converter private cable |
| US20070240893A1 (en) * | 2006-04-10 | 2007-10-18 | Bremnes Jarle J | Power cable for direct electric heating system |
| CN201222368Y (en) * | 2008-07-17 | 2009-04-15 | 无锡江南电缆有限公司 | Flexible cable |
| CN202473375U (en) * | 2012-01-19 | 2012-10-03 | 江苏昌盛电缆集团有限公司 | High-tension-resistance flexible power cable |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1503977A (en) * | 2000-06-28 | 2004-06-09 | Ƥ��������άϵͳ����˾ | Cable with recyclable covering |
| CN2762297Y (en) * | 2005-08-03 | 2006-03-01 | 宝丰电缆有限公司 | Power cable for rated voltage 0.6/1kV frequency changer circuit |
| CN2842669Y (en) * | 2005-10-21 | 2006-11-29 | 大庆油田昆仑集团有限公司 | The frequency converter private cable |
| US20070240893A1 (en) * | 2006-04-10 | 2007-10-18 | Bremnes Jarle J | Power cable for direct electric heating system |
| CN201222368Y (en) * | 2008-07-17 | 2009-04-15 | 无锡江南电缆有限公司 | Flexible cable |
| CN202473375U (en) * | 2012-01-19 | 2012-10-03 | 江苏昌盛电缆集团有限公司 | High-tension-resistance flexible power cable |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107301902A (en) * | 2017-06-23 | 2017-10-27 | 安徽华上电缆科技有限公司 | A kind of heat dissipation type high computer cable |
| CN108695028A (en) * | 2018-06-19 | 2018-10-23 | 广东朝阳电子科技股份有限公司 | A kind of anti-elater promotion preformed technique of pulling force |
| CN109585071A (en) * | 2018-12-14 | 2019-04-05 | 明达线缆集团有限公司 | A kind of resistance to lightning impulse thunder-lightning cable and preparation method |
| CN114141422A (en) * | 2020-09-03 | 2022-03-04 | 深圳市东佳信电线电缆有限公司 | Special structure environment-friendly power cable for transformer connection |
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Application publication date: 20140409 |