CN104575837A - High-voltage power cable extruded with flat aluminum sheath and manufacturing method - Google Patents

High-voltage power cable extruded with flat aluminum sheath and manufacturing method Download PDF

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Publication number
CN104575837A
CN104575837A CN201410766193.1A CN201410766193A CN104575837A CN 104575837 A CN104575837 A CN 104575837A CN 201410766193 A CN201410766193 A CN 201410766193A CN 104575837 A CN104575837 A CN 104575837A
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China
Prior art keywords
cable
aluminium sheath
voltage power
layer
power cable
Prior art date
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Pending
Application number
CN201410766193.1A
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Chinese (zh)
Inventor
金金元
朱水良
岳振国
钱朝辉
陈建平
张金林
盛雪良
杨士东
王勤良
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ZHEJIANG MORNING CABLE CO Ltd
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ZHEJIANG MORNING CABLE CO Ltd
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Application filed by ZHEJIANG MORNING CABLE CO Ltd filed Critical ZHEJIANG MORNING CABLE CO Ltd
Priority to CN201410766193.1A priority Critical patent/CN104575837A/en
Publication of CN104575837A publication Critical patent/CN104575837A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a high-voltage power cable extruded with a flat aluminum sheath and a manufacturing method. The high-voltage power cable comprises an outer cable layer and a cable core arranged in the center of the outer cable layer, wherein the outer cable layer sequentially comprises an inner semiconducting shield, an insulating layer, an outer semiconductive shield, a semiconducting buffer waterstop, an aluminum sheath, a hot melt adhesive anticorrosive layer, an outer sheath and a conductive layer from center to outside; the aluminum sheath adopts an extruded flat aluminum sheath. According to the high-voltage power cable and the manufacturing method, the extruded flat aluminum sheath is adopted, so that the external diameter of a cable in a large specification is far smaller than that of a corrugated aluminum sheath extruded cable in the same specification, materials can be saved, and the manufacturing cost of the cable and the design cost of the power authority are greatly reduced.

Description

One extrudes flat aluminium sheath high voltage power cable and manufacture method
Technical field
The present invention relates to power cable technology.
Background technology
The structure of existing high-tension cable adopts and extrudes corrugated aluminum sheath, uses extensively in current electric power system.Metal wrinkled aluminium sheath in high-tension cable bears zero sequence short circuit current Heat stability is good, prevents XLPE insulated contact from producing water tree skill to moisture, has radial waterproof and bears the effect of anti-side pressure; The corrugated aluminum sheath that existing high-tension cable extrudes is that the aluminium sheath embossing outside cable slack waterstop is become sine bellows shape, the trough of ripple and wave base along with cable specification larger, the distance of trough and wave base is also larger, and the external diameter of cable is also larger.The external diameter of cable is large, and the material that the sheath protective layer of aluminium sheath and outside is used is just many, and the cable duct external diameter of electric power system design is also just large, and the manufacturing cost of cable and the design cost of power office are also just high.
Summary of the invention
Technical problem to be solved by this invention is just to provide one and extrudes flat aluminium sheath high voltage power cable and manufacture method, reduces the outside diameter of cable, reduces cables manufacturing cost.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: one extrudes flat aluminium sheath high voltage power cable, comprise cable outer layer and the cable core being located at cable outer layer center, described cable outer layer comprises semiconductive inner shield, insulating barrier, semiconductive external shield, semi-conductive buffer water-blocking band, aluminium sheath, PUR anticorrosive coat, oversheath, conductive layer laterally successively from center, and described aluminium sheath adopts and extrudes flat aluminium sheath.
In addition, one extrudes flat aluminium sheath high voltage power cable manufacture method, comprises the steps: that copper conductor connects and move back wire drawing that---sector element is stranded, and---milliken conductor stranding------drying room is degassed, and---buffer strip is wrapped, and------test cross-linked three-layer co-extrusion to extrude flat aluminium sheath by coating hot-melt adhesive anticorrosive coat---double-layer coextrusion oversheath and conductive layer---.
The present invention is directed to the defect that existing high-tension cable extrudes corrugated aluminum sheath, adopt the flat aluminium sheath extruded, the requirement of aluminium sheath thickness reference national standard or technical specification, much little compared with the outside diameter of cable that external diameter and the same specification of large gauge cable extrude corrugated aluminum sheath, can be little by more than 6%, can save material, the manufacturing cost of cable and the design cost of power office are all significantly declined.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is power cable section structure chart of the present invention.
Embodiment
One extrudes flat aluminium sheath high voltage power cable, comprise cable outer layer and the cable core 1 being located at cable outer layer center, described cable core is coated with semiconductive band 2, and described cable outer layer comprises semiconductive inner shield 3, insulating barrier 4, semiconductive external shield 5, semi-conductive buffer water-blocking band 6, aluminium sheath 7, PUR anticorrosive coat 8, oversheath 9, conductive layer 10 laterally successively from center.
In addition, described cable core is made up of multiple split share block, described split share block is made up of many copper conductors, described split share block is fan-shaped, multiple split share block forms a full circle and coated semiconductive band around cable center, insulating paper is provided with, described copper conductor outer cladding insulating sticky gum deposit between described each split share block.
Concrete, insulating paper adopts insulating crepe paper, and described fan-shaped split share block is provided with 5.
In order to alleviate the conductor AC resistance increase because kelvin effect causes to greatest extent, effectively reducing the loss heating of conductor, increasing the ampacity of conductor, large size conductor will be divided into several parts insulated from each other namely to form milliken conductor.The solution that the present invention adopts, by selecting milliken conductor optimum structure, reduce the energy loss of heavy in section high-tension cable further, improve the ampacity of cable, in conductor structure, every root wire all insulate.Because super-section cable conductor is as adopted stranded compressing structure, the skin effect coefficient conducted electricity in transmission of electricity process will reach 54%; And according to milliken conductor structure (split isolation copper conductor), skin effect coefficient then can drop to 26%.
If in milliken conductor structure, every root wire all insulate (insulation system of anti-eddy current concentration effect class), the electric heating loss of conductor is then decreased to 8%.Therefore when determining the structure of milliken conductor, the present invention have selected and is conducive to 5 segmenting structures of constitutionally stable sector element by pretwist, and this is the most rock-steady structure that the present invention designs.For this reason, the every root copper conductor before stranded applies one deck insulating sticky gum deposit, and this adhesive glue adhesion strength is high, good toughness, and after overcompaction is stranded, adhesive glue can not ftracture and come off.Due to coating one deck insulating sticky gum deposit, in milliken conductor structure, every root wire all insulate (insulation system of anti-eddy current concentration effect class), and the electric heating loss of conductor is then decreased to 8%.Milliken conductor smooth surface rounding, alleviates the conductor AC resistance increase because kelvin effect causes to greatest extent, effectively reduces the loss heating of conductor, increase the ampacity of conductor, play energy-conservation effect; The method that fan-shaped pretwist conductor strand adopts layering and many rolls successively to press, the conductive surface that adhesive glue adheres to all the time can not come off and split, insulation coat can be adapted at sulfuration 300 DEG C of high temperature consistency in crosslinked production process, can be applicable to the normal operating condition of cable the highest 90 DEG C time.
The cabling procedure of milliken conductor is identical with conventional large size conductor stranding mode, and technical process comprises the steps: that copper conductor connects and moves back wire drawing, and---------sector element is stranded, and---------drying room is degassed, and---buffer strip is wrapped, and------coating hot-melt adhesive anticorrosive coat---extrudes oversheath and conductive layer---and tests cross-linked three-layer co-extrusion milliken conductor stranding to extrude aluminium sheath for the coating of insulating sticky gum deposit and oven dry in wire cleaning.
In addition, preheating aluminium sheath before aluminium sheath outer coating hot-melt adhesive anticorrosive coat, can avoid the aluminium sleeving temperature because of high-tension cable too low and the phenomenon such as pitch caking, pitch holiday that causes; Oversheath extrudes technological design and adopts double-layer coextrusion technology, oversheath and conductive layer are extruded simultaneously, conductive layer is made to extrude thickness even, good with cable cover(ing) adhesive property, ensure that the reliability of oversheath DC break down voltage performance, and traditional technique conductive layer adopts equadag coating, easily comes off when laying, pollute and produce and lay site environment, there is environment protecting.
And the defect of corrugated aluminum sheath is extruded for existing high-tension cable, aluminium sheath adopts and extrudes flat aluminium sheath, extruding of flat pipe aluminium sheath, adopt castle formula core rod, aluminium is evenly distributed in die cavity, guarantees that the pressure of aluminium in runner is consistent, thus the thickness extruding aluminum pipe is kept evenly.The aluminium of melting is greatly about about 500 DEG C, and the aluminium of two runners mixes in die cavity, and forms aluminum pipe between core rod and cover plate.
Temperature difference can cause the flow velocity of aluminium different with pressure.After aluminium bar enters squeegee roller, because friction generates heat, and reach in a basic balance with the inductive pick-up temperature on head top.Finally ensure that the uniformity of thickness extruded by aluminum pipe.Extrude flat aluminum pipe unwrapping wire parallel with cable axis in the horizontal direction, cable is imported by mould and does not contact aluminum pipe, according to cable specification size dimension, determine aluminum pipe extrusion die, until the edge extruding aluminum pipe is close to cable and is had certain pressure, aluminum pipe is by a series of mould after-contraction, and then cable and aluminum pipe are drawn by caterpillar haul off device, this caterpillar haul off device, controls whole line speed; Then crawler is crossed by great wheel, by aluminium sheath anticorrosive coat thermosol coating unit, more directly enter oversheath double-layer coextrusion equipment, after oversheath and conductive layer are extruded, enter water cooling simultaneously, cable is crossed tank and is dried up rear coding lettering, upper take-up reel take-up after crawling traction.
Extrude the advantage of flat aluminium cover cable:
1, oversheath and level and smooth aluminium sheath are extruded by a co-extruder head simultaneously;
2, this makes the sheath in metallic shield impossible wrinkling;
3, this bending radius being tightly linked clad aluminum-PE sheath can reach 20 times of outside diameters of cable;
4, between flat aluminium cover and cable outer shielding layer, gap is very little, therefore the excellent block-water effect of cable can be realized, the water blocking layer of cable can be used as again the resilient coating of cable simultaneously, and the structure of such cable is just closely reasonable, due to the effect of water blocking layer, the block-water effect of cable is better;
5, because flat aluminium cover high-tension cable is without wrinkle sheath, cable is just corresponding when cable installation in pipe reduces frictional resistance, and cable construction is more convenient, safer.

Claims (6)

1. one kind extrudes flat aluminium sheath high voltage power cable, comprise cable outer layer and the cable core being located at cable outer layer center, it is characterized in that: described cable outer layer comprises semiconductive inner shield, insulating barrier, semiconductive external shield, semi-conductive buffer water-blocking band, aluminium sheath, PUR anticorrosive coat, oversheath, conductive layer laterally successively from center, described aluminium sheath adopts and extrudes flat aluminium sheath.
2. one according to claim 1 extrudes flat aluminium sheath high voltage power cable, it is characterized in that: described cable core is made up of multiple split share block, and described split share block is made up of many copper conductors.
3. one according to claim 2 extrudes flat aluminium sheath high voltage power cable, it is characterized in that: be provided with insulating paper between described each split share block, described copper conductor outer cladding insulating sticky gum deposit.
4. one according to claim 1 extrudes flat aluminium sheath high voltage power cable, it is characterized in that: described oversheath and conductive layer double-layer coextrusion shaping.
5. extrude a flat aluminium sheath high voltage power cable manufacture method, it is characterized in that comprising the steps: that copper conductor even moves back wire drawing that---sector element is stranded, and---milliken conductor stranding------drying room is degassed, and---buffer strip is wrapped, and------test cross-linked three-layer co-extrusion to extrude flat aluminium sheath by coating hot-melt adhesive anticorrosive coat---double-layer coextrusion oversheath and conductive layer---.
6. one according to claim 5 extrudes flat aluminium sheath high voltage power cable manufacture method, it is characterized in that: extruding of flat aluminium sheath, adopts castle formula core rod.
CN201410766193.1A 2014-12-12 2014-12-12 High-voltage power cable extruded with flat aluminum sheath and manufacturing method Pending CN104575837A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106057371A (en) * 2016-07-07 2016-10-26 远东电缆有限公司 Smart energy HCCV ultrahigh-voltage crosslinking polyethylene-insulated power cable and manufacturing method thereof
CN106384623A (en) * 2016-09-07 2017-02-08 泉州圆创机械技术开发有限公司 Anticorrosion wire
CN108091433A (en) * 2017-12-12 2018-05-29 杭州电缆股份有限公司 The processing method that high pressure corrugated metal covers low eccentricity polyethylene outer sheath power cable
CN109473225A (en) * 2018-12-17 2019-03-15 山东科虹线缆科技有限公司 Termite-proof extra-high-tension cable of the crosslinked polyetylene insulated protection against rodents of 220kV and preparation method thereof
CN111292904A (en) * 2020-03-27 2020-06-16 浙江晨光电缆股份有限公司 Compound level and smooth aluminium sheathing multilayer is crowded cable production facility altogether
CN112017814A (en) * 2019-05-29 2020-12-01 中天科技海缆有限公司 Smooth aluminum sleeve environment-friendly flame-retardant high-voltage cable and manufacturing method thereof
CN114283991A (en) * 2021-12-20 2022-04-05 杭州电缆股份有限公司 Smooth aluminum sheath high-voltage power cable and production process thereof
CN117497248A (en) * 2024-01-02 2024-02-02 尚纬股份有限公司 Preparation method of solid split aluminum conductor high-voltage cable
RU2823602C1 (en) * 2024-02-07 2024-07-24 Общество с ограниченной ответственностью "Научно-производственная компания "Энергия" Method of making power cables with impregnated paper insulation

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CN2485760Y (en) * 2001-05-23 2002-04-10 宝胜Bicc通用电缆有限公司 Electric power cable with waterproof high pressure polyethylene insulation
CN101436449A (en) * 2008-12-26 2009-05-20 哈尔滨理工大学 High voltage, ultra-high voltage crosslinked polyetylene insulated power cable with non-linear insulating layer
CN101620898A (en) * 2009-08-10 2010-01-06 杭州电缆有限公司 Production method for crosslinked polyethylene insulating power cable for ultra-high voltage aluminum core segmental conductor
CN201897997U (en) * 2010-10-12 2011-07-13 江苏上上电缆集团有限公司 110kV cross-linked polyethylene insulated power cable
CN102610319A (en) * 2012-03-28 2012-07-25 宜昌联邦电缆有限公司 750-1100kV ultra-high-voltage crosslinked polyethylene insulating power cable
CN202495275U (en) * 2012-03-26 2012-10-17 北京市重型电缆厂 Copper cladded aluminum signal transmission cable
CN103824638A (en) * 2014-02-14 2014-05-28 申环电缆科技有限公司 Intelligent power grid-used high-voltage photoelectric composite cable with externally-arranged optical fibers
CN204303449U (en) * 2014-12-12 2015-04-29 浙江晨光电缆股份有限公司 One extrudes flat aluminium sheath high voltage power cable

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2485760Y (en) * 2001-05-23 2002-04-10 宝胜Bicc通用电缆有限公司 Electric power cable with waterproof high pressure polyethylene insulation
CN101436449A (en) * 2008-12-26 2009-05-20 哈尔滨理工大学 High voltage, ultra-high voltage crosslinked polyetylene insulated power cable with non-linear insulating layer
CN101620898A (en) * 2009-08-10 2010-01-06 杭州电缆有限公司 Production method for crosslinked polyethylene insulating power cable for ultra-high voltage aluminum core segmental conductor
CN201897997U (en) * 2010-10-12 2011-07-13 江苏上上电缆集团有限公司 110kV cross-linked polyethylene insulated power cable
CN202495275U (en) * 2012-03-26 2012-10-17 北京市重型电缆厂 Copper cladded aluminum signal transmission cable
CN102610319A (en) * 2012-03-28 2012-07-25 宜昌联邦电缆有限公司 750-1100kV ultra-high-voltage crosslinked polyethylene insulating power cable
CN103824638A (en) * 2014-02-14 2014-05-28 申环电缆科技有限公司 Intelligent power grid-used high-voltage photoelectric composite cable with externally-arranged optical fibers
CN204303449U (en) * 2014-12-12 2015-04-29 浙江晨光电缆股份有限公司 One extrudes flat aluminium sheath high voltage power cable

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106057371A (en) * 2016-07-07 2016-10-26 远东电缆有限公司 Smart energy HCCV ultrahigh-voltage crosslinking polyethylene-insulated power cable and manufacturing method thereof
CN106057371B (en) * 2016-07-07 2020-08-28 远东电缆有限公司 HCCV ultrahigh-voltage crosslinked polyethylene insulated power cable for smart energy and manufacturing method thereof
CN106384623A (en) * 2016-09-07 2017-02-08 泉州圆创机械技术开发有限公司 Anticorrosion wire
CN108091433A (en) * 2017-12-12 2018-05-29 杭州电缆股份有限公司 The processing method that high pressure corrugated metal covers low eccentricity polyethylene outer sheath power cable
CN108091433B (en) * 2017-12-12 2021-05-25 杭州电缆股份有限公司 Processing method of high-voltage corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable
CN109473225A (en) * 2018-12-17 2019-03-15 山东科虹线缆科技有限公司 Termite-proof extra-high-tension cable of the crosslinked polyetylene insulated protection against rodents of 220kV and preparation method thereof
CN112017814A (en) * 2019-05-29 2020-12-01 中天科技海缆有限公司 Smooth aluminum sleeve environment-friendly flame-retardant high-voltage cable and manufacturing method thereof
CN111292904A (en) * 2020-03-27 2020-06-16 浙江晨光电缆股份有限公司 Compound level and smooth aluminium sheathing multilayer is crowded cable production facility altogether
CN111292904B (en) * 2020-03-27 2022-04-05 浙江晨光电缆股份有限公司 Compound level and smooth aluminium sheathing multilayer is crowded cable production facility altogether
CN114283991A (en) * 2021-12-20 2022-04-05 杭州电缆股份有限公司 Smooth aluminum sheath high-voltage power cable and production process thereof
CN117497248A (en) * 2024-01-02 2024-02-02 尚纬股份有限公司 Preparation method of solid split aluminum conductor high-voltage cable
RU2823602C1 (en) * 2024-02-07 2024-07-24 Общество с ограниченной ответственностью "Научно-производственная компания "Энергия" Method of making power cables with impregnated paper insulation

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Application publication date: 20150429