CN101339824A - Composite insulating tube type bus and method for preparing the same - Google Patents

Composite insulating tube type bus and method for preparing the same Download PDF

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Publication number
CN101339824A
CN101339824A CNA2008100416632A CN200810041663A CN101339824A CN 101339824 A CN101339824 A CN 101339824A CN A2008100416632 A CNA2008100416632 A CN A2008100416632A CN 200810041663 A CN200810041663 A CN 200810041663A CN 101339824 A CN101339824 A CN 101339824A
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China
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composite
conductor
insulating
layer
type bus
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CNA2008100416632A
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Chinese (zh)
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CN101339824B (en
Inventor
袁康
杨小强
袁授本
汤大勇
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上海西邦电气有限公司
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Abstract

The invention discloses a compound insulating tube busbar and a preparation method thereof in the technical field of high voltage insulated conduction. The compound insulating tube busbar comprises a conductor tube, a compound insulating layer, a semiconductor electric strip layer, a shielding layer and a sleeve, wherein, the conductor tube is positioned on the innermost layer; a plurality of the compound insulating layers and the semiconductor electric strip layers are crosswise arranged at the external part of the semiconductor tube; a copper foil layer is arranged at the external part of the semiconductor electric strip layer and the sleeve is arranged at the external part of the copper foil layer. The preparation method of the invention adopts different properties of a solid buddle-free insulating film strip and insulating liquid to enwind and solidify the shaped insulating tube busbar on the surface of the tubular conductor, which causes the production procedure to be simple and the maintenance to be simple and convenient; compared with the prior art, the compound insulating tube busbar has better insulating property and longer service life, and can be applied to bitter environments.

Description

Composite insulating tube type bus and preparation method thereof

Technical field

What the present invention relates to is a kind of method of high voltage transmission technical field, specifically is a kind of composite insulating tube type bus and preparation method thereof.

Background technology

Along with the growth of power load, the increase of transforming plant main transformer separate unit capacity, the electric current of low-pressure side also constantly increases.And along with the restriction of transformer station's floor space, setting to equipment is more and more intensive, traditional rectangular bus bar is little because of ampacity, kelvin effect is low, floor space is big, reasons such as the site operation cycle is long are the needs in incompatibility market more and more, therefore tube type bus is in ampacity and kelvin effect, heat dispersion is all preponderated, the mode that traditional tube type bus insulating method adopts supporting insulator and heat-shrinkable T bush bag to protect usually insulate, it is big that but this still can't resolve floor space, the problems such as fault that toy causes, along with the development of insulating material, the especially development of composite insulating material and technology is for the insulating process processing method of insulating tube type busbar provides on the material and technical guarantee.

Reasons such as tube type bus is long owing to length, and volume is big, and shape is various are difficult problems so its surface insulation is handled all the time.People are difficult to apply mechanically existing processes: as the method that extrudes of cable, and the die casting method of sleeve pipe etc.Sweden MGC company adopts APG explained hereafter pipe typed insulation bus, but its technology is complicated, has caused the prolongation of time of delivery, and repairs during fault and be difficult for.Domestic also have producer to adopt methods such as polytetrafluoroethylene overlapping winding, all has the bus insulation layer to slide under gravity easily, layering, and air is more, and it is bigger that office puts, shortcomings such as sheath life-span weak point.

Find through retrieval prior art, China Patent No. ZL02235608.8, authorize the utility model patent of publication number CN2552220Y, put down in writing a kind of " dry-type high-voltage wall bushing ", comprise: terminal block links conducting rod, insulating barrier is provided with outside the conducting rod, ring flange is provided with the outer interposition of insulating barrier, its insulating barrier is dry solid insulation material band and aluminium foil, divide the equidistant coileds of electric capacity such as laminated structure equal thickness by ganged condenser, fill iknsulating liquid in it, the silicon rubber full skirt is set in the insulating barrier outside.But this technology must be packed into iknsulating liquid in the insulating barrier in advance, during use such as wall bushing cause insulating barrier to have slightly through distortion breaking, inner iknsulating liquid then might be revealed and cause insulation effect to reduce, and through after long-time the use, iknsulating liquid causes the internal liquid changes in distribution after flowed by gravity effect, will form the slit when serious and cause partial discharge phenomenon to increase and the reduction insulation property.

Find through retrieval in addition prior art, Chinese patent application number 01144480.0, authorize the application for a patent for invention of publication number CN1427423A, put down in writing a kind of " AC high voltage sleeve ", comprise: agent structure is that two ends insulating coating and the coupling sleeve inside, middle part that has a ground connection flange are provided with capacitor core, it is characterized in that the dielectric of asking at conducting rod and each capacitor plate is to be filled to solidify under back high temperature or the room temperature condition by liquid synthetic rubber casting to make.It is too complicated that but the shortcoming of the prior art is its casting process, makes this technology can not satisfy market demands and must customize the different fringe costs that mould caused according to difformity at every turn.

Summary of the invention

The present invention is directed to the prior art above shortcomings, a kind of composite insulating tube type bus and preparation method thereof is provided, the different characteristic of utilizing solid not have bubble insulation film band and dielectric is twined also at the cast conductive surface, and the insulating tube type busbar of curing molding has the production process simplification, keep in repair easy characteristics, compared with prior art have better insulation property and longer useful life, and can be applied in the adverse circumstances.

The present invention is achieved by the following technical solutions, relating to composite insulating tube type bus among the present invention specifically comprises: conductor tube, composite insulation layer, semi-conductor electricity belt, screen and sleeve pipe, wherein: conductor tube is positioned at innermost layer, intersection is provided with several layers composite insulation layer and semi-conductor electricity belt in the outside of conductor tube, copper foil layer is arranged at semi-conductor electricity belt outside, is provided with sleeve pipe in the copper foil layer outside.

The cross section of described conductor tube is circular, and the cross section external diameter is 60mm to 140mm, and the cross section internal diameter is 30mm to 100mm; This conductor tube is specially a kind of in copper, aluminium or its alloy.

Described composite insulation layer comprises insulating tape and dielectric, wherein is provided with dielectric between semiconductive belt and the insulating tape, and the mode that insulating tape twines with half lap is provided with the outside with conductor tube or last layer composite insulation layer.

Described half lap twines and is meant that specifically composite insulation layer and conductor tube or last layer composite insulation layer are the θ angle and twine, each layer composite insulation layer and last layer composite insulation layer winding stack width are half of composite insulation layer width, and described θ angular range equals 30 ° to 60 °.

The profile of described insulating tape is banded, and the cross section is a rectangle, and cross-sectional length is 25mm to 35mm, and cross-sectional width is 0.01mm to 0.02mm; The quality of this insulating tape is fine and close bubble-free insulating material, is specially polyester belt, teflin tape or other and has fine and close no bubble and have a kind of than in the material that can be processed into band shape in the high insulating property;

Described dielectric is the good curable liquid insulating material of bubble-free caking property, is specially epoxy resin or organic siliconresin;

Described semiconductor conducting layer is tender texture and has the very ribbon with semiconductive characteristic of obdurability, is specially semiconductive paper tape or semiconductive adhesive tape;

Described screen is aluminium foil or copper foil layer, and concrete thickness is 0.1mm to 0.3mm;

Described sleeve pipe is the bellows of stainless steel quality or the heat-shrinkable T bush of PVC quality.

Relate to the preparation method of composite insulating tube type bus among the present invention, concrete steps are as follows:

(1) pretreatment of raw material:

At first place electrothermal tube in the inside of conductor tube and be incubated, design temperature remains on 35 ℃ to 45 ℃; Then insulating tape, semi-conductor electricity band and Copper Foil are placed baking oven heating 2 hours, heating-up temperature is 100 ℃; Again pending dielectric is taken out the vessel from packing, place de-airing mixer under 4~6Pa environment, to stir 20 minutes, make dielectric after stirring inner even and remove unnecessary bubble with 100 rev/mins of speed; Insulating tape after will heating at last and semi-conductor electricity band place the dielectric after the stirring to soak 1 hour and continue simultaneously to vacuumize, and make the even coated insulation liquid all around of insulating tape and semi-conductor electricity band.

(2) twine and smear:

The mode of twining with the half lap of θ angle is twined insulating tape after several layers soaks in the conductor tube outside, smear dielectric at the insulating tape half lap place in the conductor tube outside then, again by the tension method extrude insulating tape the place of laminating bubble and will soak equally in the half lap mode after the semi-conductor electricity band be wound to the insulating tape outside, specifically be that every half lap twines behind 10 layers to the 30 layers insulating tape again that half lap twines 1 layer of semi-conductor electricity band; The composite insulation layer that comprises insulating tape and semi-conductor electricity band according to different these steps of repetitive operation of electric pressure with the acquisition multilayer.

(3) screen and earth terminal are set:

Through twine and smear dielectric after the skin of outermost semiconductive electricity band coat aluminium foil or Copper Foil as screen, and in this screen, draw an earth terminal, with this earth terminal ground connection, making its surface potential is zero, makes the insulation core of composite insulating tube type bus during installation;

(4) solidify:

After finishing screen, the insulation core of composite insulating tube type bus placed to solidify in the case be cured, the curing environment of setting is 140 ℃ to 160 ℃ of temperature, need rotate bus during curing, speed is that per minute 30 goes to 60 and changes.

(5) install sheath additional:

The insulation core of the composite insulating tube type bus that curing is finished installs heat-shrinkable T bush or corrugated stainless steel tubing additional according to different user.

The present invention utilizes the insulating material of two kinds of different qualities: the different characteristic that solid does not have bubble insulation film band and a dielectric is twined and the processing method of curing molding at the cast conductive surface, make the tube type bus surface form one or more layers (the electric capacity screen of respective numbers can be set according to the electric pressure difference) composite insulating material in the insulation material, and adhere to tube wall and be solidified into as a whole, owing to before the existing in of liquid insulating material solidified most of air of interlayer are extruded, because separating remaining few air, the existence that solid does not have a bubble insulation film band make it can't form continuous discharge channel, even because half lap twines and to make air form that passage also can't directly pass insulating barrier and must not have the intersect edge of bubble insulation film band along solid creepage, its creepage distance is far longer than the end creepage distance.Make the present invention have good insulation preformance: partial discharge quantity is little, and the dielectric loss value is low; Fail safe is good: surperficial people is tangible, effectively prevents toy climbing and the short circuit accident that causes; Avoid safeguarding, can save the characteristics of lot of manpower and material resources.

Description of drawings

Fig. 1 is a composite insulating tube type bus schematic diagram among the embodiment;

Fig. 2 is a half lap canoe schematic diagram among the embodiment.

Embodiment

Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.

As shown in Figure 1, present embodiment is the composite insulating tube type bus of withstand voltage 10KV, specifically comprise: conductor tube 1, composite insulation layer 2, semiconductor conducting layer 3, copper foil layer 4 and sleeve pipe 5, wherein: conductor tube 1 is positioned at innermost layer, intersection is provided with several layers composite insulation layer 2 and semi-conductor electricity belt 3 in the outside of conductor tube 1, copper foil layer 4 is arranged at semi-conductor electricity belt 3 outsides, is provided with sleeve pipe 5 in copper foil layer 4 outsides.

Described conductor tube 1 is specially the copper tube of external diameter 80mm internal diameter 60mm, the copper content of this copper tube>99.4%;

Described composite insulation layer 2 comprises insulating tape 6 and dielectric 7, wherein is provided with dielectric 7 between semiconductive belt 3 and the insulating tape 6, and the mode that insulating tape 6 twines with half lap is provided with the outside with conductor tube 1 or last layer composite insulation layer 2;

Described insulating tape 6 is specially F level DMD6641 modified poly ester film-based fibre non woven fabric composite flexible material, and this insulating tape profile is width 35mm, thickness 0.15mm;

Described dielectric 7 is a FR-108 bi-component no-solvent type organosilicon coating, specifically comprises A group organosilicon and B group curing agent;

Described semi-conductor electricity belt 3 is specially: resistance is 1mm/1k Ω, and overall dimension is wide 35mm, the semi-conductive tape of the crimped paper material of thick 0.15mm;

Described screen 4 is a Copper Foil, is specially width 35mm, thickness 0.1mm;

Described sleeve pipe 5 is the bellows of stainless steel quality or the heat-shrinkable T bush of PVC quality.

The manufacturing step of the 10KV insulation copper pipe bus described in the foregoing description is specific as follows:

The first step places 100 ℃ of heating of baking oven with insulating tape, semi-conductor electricity band and Copper Foil, and built-in 1kw electrothermal tube makes its temperature remain on 40 ℃ by thermostat in conductor tube; The A of dielectric group organosilicon and B group curing agent are taken out from the packing vessel respectively, dispose by 100: 5 mass ratios and be placed in the de-airing mixer, setting air pressure is 5Pa, stirs and removes bubble; Insulating tape and semi-conductor electricity band were positioned in the dielectric that stirs 1 hour, its two sides evenly is coated with spread take out behind the dielectric standby;

In second step, twine and smear: will flood good insulating tape and semi-conductor electricity band is that the mode that 45 ° half lap twines is wrapped on the contact tube with the θ angle, and the while is smeared dielectric in half lap winding place, and the place's of laminating bubble is driven out of; Canoe is specially: half lap twined 1 layer of semi-conductor electricity band after every half lap twined 20 layers of insulating tape, repeated 3 times and twined 3 layers of composite insulation layer of back formation; The ERROR CONTROL that described half lap twines is in 2mm.

In the 3rd step, be with half lap to twine Copper Foil at the outermost semiconductive electricity then, and fill with dielectric as screen, and in this screen, draw an earth terminal, with this earth terminal ground connection, making its surface potential is zero, makes the insulation core of composite insulating tube type bus during installation;

The 4th step, solidify: the two ends of the insulation core of composite insulating tube type bus are fixed to place in the baking oven with anchor ear solidify, temperature evenly is raised to 150 ℃ keeps after 3 ~ 5 minutes uniform decrease in temperature to room temperature, insulation core with composite insulating tube type bus in the time of heating keeps low speed to rotate uniformly, so that liquid evenly distributes good looking appearance; After the curing bus is taken out, the coagulation that the surface is unnecessary is removed, and exposes Copper Foil and polishes smooth, and prepares to install additional sheath.

In the 5th step, install sheath additional: the insulation core of finishing the composite insulating tube type bus that also surface treatment is good in curing is inserted in corrugated stainless steel tubing, and these corrugated stainless steel tubing two ends also isolate ultraviolet ray with the epoxy resin embedding adhesive sealing with protection against the tide.

Present embodiment can guarantee that isolated bus reaches the F class F insulation, and office discharges water and puts down under 8.6 kilovoltages smaller or equal to 10pC, and smaller or equal to 5pC, tan δ smaller or equal to 0.015, and has fire prevention, moisture-proof function under 5.8 kilovoltages under 5.8 kilovoltages.Because insulating barrier has certain elasticity, therefore, the isolated bus of Sheng Chaning can also allow certain flexibility in this way, and this function can compensate the bus flexural deformation that settlement of foundation brings, and does not influence the performance and the use of product.

Claims (10)

1, a kind of composite insulating tube type bus, it is characterized in that, specifically comprise: conductor tube, composite insulation layer, semi-conductor electricity belt, screen and sleeve pipe, wherein: conductor tube is positioned at innermost layer, intersection is provided with several layers composite insulation layer and semi-conductor electricity belt in the outside of conductor tube, composite insulation layer comprises insulating tape and dielectric, be provided with dielectric between semiconductive belt and the insulating tape, the mode that insulating tape twines with half lap is provided with the outside with conductor tube or last layer composite insulation layer, copper foil layer is arranged at semi-conductor electricity belt outside, is provided with sleeve pipe in the copper foil layer outside.
2, composite insulating tube type bus according to claim 1, it is characterized in that, described half lap twines, be meant: composite insulation layer and conductor tube or last layer composite insulation layer are the θ angle and twine, and each layer composite insulation layer and last layer composite insulation layer winding stack width are half of composite insulation layer width.
3, composite insulating tube type bus according to claim 2 is characterized in that, described θ angle, its scope equal 30 ° to 60 °.
4, composite insulating tube type bus according to claim 1 is characterized in that, described insulating tape is fine and close bubble-free insulating material, is specially polyester belt or teflin tape.
5, composite insulating tube type bus according to claim 1 is characterized in that, described dielectric is specially FR-108 bi-component no-solvent type organosilicon coating, comprises A group organosilicon and B group curing agent, and the mass ratio by 100: 5 during use disposes.
6, a kind of preparation method of composite insulating tube type bus according to claim 1 is characterized in that, specifically may further comprise the steps:
The first step, pretreatment of raw material: at first place the electrothermal tube insulation, and place baking oven to heat insulating tape, semi-conductor electricity band and Copper Foil in the inside of conductor tube; Then pending dielectric is taken out from the packing vessel, place de-airing mixer under 4~6Pa environment, to stir 20 minutes with 100 rev/mins of speed; Insulating tape after will heating at last and semi-conductor electricity band place the dielectric after the stirring to soak 1 hour;
Second step, twine and smear: the mode that the insulating tape after will soaking twines with half lap is twined several layers in the conductor tube outside, smear dielectric at the insulating tape half lap place in the conductor tube outside then, again by the tension method extrude insulating tape the place of laminating bubble and will soak equally in the half lap mode after the semi-conductor electricity band be wound to the insulating tape outside;
The 3rd step, screen and earth terminal are set: outside the outermost semiconductive electricity band through winding and after smearing dielectric, coat aluminium foil or Copper Foil as screen, and in this screen, draw an earth terminal, with this earth terminal ground connection, make the insulation core of composite insulating tube type bus;
In the 4th step, solidify: after finishing screen, the insulation core of composite insulating tube type bus placed to solidify in the case be cured;
In the 5th step, install sheath additional: the insulation core of the composite insulating tube type bus that curing is finished installs heat-shrinkable T bush or corrugated stainless steel tubing additional according to different user.
7, the preparation method of composite insulating tube type bus according to claim 6 is characterized in that, places baking oven to heat insulating tape, semi-conductor electricity band and Copper Foil described in the first step, is meant that specifically be 2 hours heating time, and heating-up temperature is 100 ℃.
8, the preparation method of composite insulating tube type bus according to claim 6, it is characterized in that, the mode that insulating tape after will soak described in second step twines with half lap is twined several layers outside conductor tube, specifically be meant and twine behind 10 layers to the 30 layers insulating tape every half lap again half lap twines 1 layer of semi-conductor electricity band, according to different these steps of repetitive operation of electric pressure to obtain multilayer insulation band and semi-conductor electricity band.
9, the preparation method of composite insulating tube type bus according to claim 6 is characterized in that, dielectric is smeared at the insulating tape half lap place in the conductor tube outside described in second step, is meant that specifically it is 0.01mm to 0.1mm that dielectric is smeared to thickness.
10, the preparation method of composite insulating tube type bus according to claim 6, it is characterized in that, curing described in the 4th step, being meant specifically that insulation core with composite insulating tube type bus places to solidify in the case is cured, the curing environment of setting is 140 ℃ to 160 ℃ of temperature, need rotate bus during curing, speed is that per minute 30 goes to 60 commentaries on classics.
CN2008100416632A 2008-08-14 2008-08-14 Composite insulating tube type bus and method for preparing the same CN101339824B (en)

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CN101339824B CN101339824B (en) 2010-11-03

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101872907A (en) * 2010-06-11 2010-10-27 浙江金凤凰电气有限公司 High-voltage insulated bus connector and connecting method thereof
CN101667474B (en) * 2009-08-26 2012-01-25 上海西邦电气有限公司 Insulating tube type busbar manufacturing method
CN102545641A (en) * 2010-12-14 2012-07-04 贵阳铝镁设计研究院有限公司 Method for supplying long-distance and large-current power
CN102709776A (en) * 2012-05-23 2012-10-03 浙江同益电力设备有限公司 Composite sleeve processing method
CN101763923B (en) * 2010-02-20 2013-01-02 罗志昭 High-voltage end
CN103854803A (en) * 2014-03-10 2014-06-11 四川九洲线缆有限责任公司 High-anti-interference cable and preparing method thereof
CN104900327A (en) * 2015-06-27 2015-09-09 深州市远征氟塑料有限公司 Integrated dry-insulated tubular busbar and manufacturing method thereof
CN104900340A (en) * 2015-05-14 2015-09-09 江苏沃能电气科技有限公司 Insulated pipe type bus production method
CN105825956A (en) * 2015-01-05 2016-08-03 如皋天安电气科技有限公司 Method for processing novel composite silicone rubber solid insulated bus
CN106782918A (en) * 2016-12-20 2017-05-31 镇江程灿科技服务有限公司 A kind of preparation method of equivalent potential screen cast heavy-current bus-bars
CN106782854A (en) * 2016-12-20 2017-05-31 镇江程灿科技服务有限公司 A kind of equivalent potential screen cast heavy-current bus-bars and preparation method thereof
CN107658055A (en) * 2016-05-12 2018-02-02 杨攀 A kind of family expenses electric wire
CN108320841A (en) * 2017-12-08 2018-07-24 国网北京市电力公司 Busbar, bus-bar room and switchgear
IT201800006265A1 (en) * 2018-06-13 2019-12-13 "Method for producing an electrical supply bar and so 'made bar"

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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GB499730A (en) * 1937-06-30 1939-01-27 British Thomson Houston Co Ltd Improvements in and relating to liquid filled electrical insulating bushings
GB928057A (en) * 1960-12-06 1963-06-06 British Insulated Callenders Improvements in or relating to high voltage power cables
CN1427423A (en) * 2001-12-19 2003-07-02 孟繁恒 AC high voltage sleeve
CN2552220Y (en) * 2002-05-31 2003-05-21 张雅坤 Dry-high voltage through-wall sleeve

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101667474B (en) * 2009-08-26 2012-01-25 上海西邦电气有限公司 Insulating tube type busbar manufacturing method
CN101763923B (en) * 2010-02-20 2013-01-02 罗志昭 High-voltage end
CN101872907B (en) * 2010-06-11 2012-04-25 浙江金凤凰电气有限公司 Connecting method of high-voltage insulated bus connector
CN101872907A (en) * 2010-06-11 2010-10-27 浙江金凤凰电气有限公司 High-voltage insulated bus connector and connecting method thereof
CN102545641A (en) * 2010-12-14 2012-07-04 贵阳铝镁设计研究院有限公司 Method for supplying long-distance and large-current power
CN102709776B (en) * 2012-05-23 2014-06-04 浙江同益电力设备有限公司 Composite sleeve processing method
CN102709776A (en) * 2012-05-23 2012-10-03 浙江同益电力设备有限公司 Composite sleeve processing method
CN103854803A (en) * 2014-03-10 2014-06-11 四川九洲线缆有限责任公司 High-anti-interference cable and preparing method thereof
CN105825956A (en) * 2015-01-05 2016-08-03 如皋天安电气科技有限公司 Method for processing novel composite silicone rubber solid insulated bus
CN104900340A (en) * 2015-05-14 2015-09-09 江苏沃能电气科技有限公司 Insulated pipe type bus production method
CN104900327B (en) * 2015-06-27 2016-09-28 深州市远征氟塑料有限公司 The manufacture method of integral type dry type insulating tube type busbar
CN104900327A (en) * 2015-06-27 2015-09-09 深州市远征氟塑料有限公司 Integrated dry-insulated tubular busbar and manufacturing method thereof
CN107658055A (en) * 2016-05-12 2018-02-02 杨攀 A kind of family expenses electric wire
CN106782918A (en) * 2016-12-20 2017-05-31 镇江程灿科技服务有限公司 A kind of preparation method of equivalent potential screen cast heavy-current bus-bars
CN106782854A (en) * 2016-12-20 2017-05-31 镇江程灿科技服务有限公司 A kind of equivalent potential screen cast heavy-current bus-bars and preparation method thereof
CN108320841A (en) * 2017-12-08 2018-07-24 国网北京市电力公司 Busbar, bus-bar room and switchgear
IT201800006265A1 (en) * 2018-06-13 2019-12-13 "Method for producing an electrical supply bar and so 'made bar"

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