CN103366872B - A kind of circular shield isolated bus - Google Patents
A kind of circular shield isolated bus Download PDFInfo
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- CN103366872B CN103366872B CN201310227732.XA CN201310227732A CN103366872B CN 103366872 B CN103366872 B CN 103366872B CN 201310227732 A CN201310227732 A CN 201310227732A CN 103366872 B CN103366872 B CN 103366872B
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Abstract
The present invention relates to that a kind of current-carrying capacity is big, good heat dissipation, temperature rise are low, electrical insulation properties by force, not by environmental disturbances, circular shield isolated bus that reliability is high, including round conductor and outer protective sleeve, wherein, multilayer insulation screen layer it is provided with between round conductor and outer protective sleeve, insulation screen is made up of insulating barrier and screen layer, described insulating barrier includes two-layer politef and sheath shrinkable sleeve from inside to outside, uniform coating silicon oil between politef and sheath shrinkable sleeve。<!--1-->
Description
Technical field
The invention belongs to High-Voltage Electrical Appliances field, be specifically related to a kind of circular shield isolated bus。
Background technology
Development along with domestic economy, the power load of each transformer station is surged therewith, system running current is increasing, load is increasingly concentrated, the main transformer capacity of transformer station is also increasing, and conventional connected modes adopting multi-disc rectangle busbars or directly use cable connection in engineering more, these need not well adapt to the working method of big electric current (more than 3000A), causes that added losses are big, CURRENT DISTRIBUTION is uneven, skin effect coefficient increases and causes current capacity to decline and the phenomenon such as contact heating is more and more obvious simultaneously。
Domestic bus is through technique improvement so that insulating barrier all adopts politef to hold mostly。The shortcoming of isolated bus is exactly mainly the middle insulation processing connected, the insulation of single pipe mother is all carry out before dispatching from the factory, transition joint is exactly female for on-the-spot single pipe and female the docking of single pipe, the insulation processing of transition joint is done again after having docked, but the humidity of surrounding and temperature are impossible to meet, even manual hold time may bring impurity into so that the female electrical insulation properties of pipe is substantially reduced。
Summary of the invention
The technical problem to be solved be provide that a kind of current-carrying capacity is big for above drawback, good heat dissipation, temperature rise are low, electrical insulation properties by force, not by environmental disturbances, circular shield isolated bus that reliability is high。
For solving above-mentioned technical problem, the technical scheme is that
A kind of circular shield isolated bus, including round conductor and outer protective sleeve, wherein, is provided with multilayer insulation screen layer between described round conductor and outer protective sleeve, described insulation screen length is less than round conductor length。
Above-mentioned a kind of circular shield isolated bus, wherein, described insulation screen is made up of insulating barrier and screen layer, and described insulating barrier includes two-layer politef and sheath shrinkable sleeve from inside to outside, uniform coating silicon oil between politef and sheath shrinkable sleeve。
Above-mentioned a kind of circular shield isolated bus, wherein, the length of every layer of described insulation screen is uniformly successively decreased from inside to outside。
Above-mentioned a kind of circular shield isolated bus, wherein, is provided with passage in described round conductor。
The processing method of above-mentioned a kind of circular shield isolated bus, its method is as follows:
1. round conductor two ends are respectively stayed after 20cm at one layer of aluminium foil of conductive surface tight enclosure as screen layer；
2. after aluminium foil outer wrap two-layer politef uniform coating silicon oil, at politef outer wrap sheath shrinkable sleeve as insulating barrier；
3. above-mentioned steps 1,2 can be considered first insulation screen, hereafter respectively stays 5cm at each insulation screen two ends, repeat step 1,2 carry out second, third, the making of fourth class insulation screen, the concrete number of plies is as the criterion to be actually needed；
4. weave after copper mesh does grounding at outermost layer insulation screen outer wrap and hold the outer protective sleeve that a layer is material with polyolefin high polymer。
The invention have the benefit that
(1) current-carrying capacity is big
Buses of insulation tubes is hollow conductor, and surface area is big, and conductive surface electric current distribution is uniform。Therefore, isolated bus is particularly suitable for the loop that operating current is big。
(2) kelvin effect is low, power loss is little
The skin effect coefficient of buses of insulation tubes is low, Kf≤1, and AC resistance is little, thus the power loss of bus is little。According to multi-slice rectangle conductor, along with the increase of sheet number, skin effect coefficient continues to increase, and the effective-current amount of unit section declines, and between sheet and sheet, CURRENT DISTRIBUTION is uneven, and added losses strengthen, and radiating condition is poor。
(3) radiating condition is good, temperature rise is low
Buses of insulation tubes is hollow conductor, bus internal diameter air channel energy self-assembling formation hot-air convection, and the draught head of indoor and outdoors, energy self-assembling formation hot-air convection, radiating condition is good, thus substantially increasing power supplying efficiency。
(4) allowable stress [σ] is big, and mechanical strength is high
The allowable stress of buses of insulation tubes is 4 times of rectangular bus bar, and the short circuit current that can bear is big, and mechanical strength is high so that bus supports span and strengthens。When 50KA short circuit current, the unsettled span of Φ 100 × 5mm isolated bus reaches 9 meters, bus bar cupport is utilized to support, the span of bus can reach 13 meters, owing to bus span is big, altitude chamber can be directly entered be connected with indoor current-limiting reactor or 10 KV switch cabinets, decrease corresponding support insulator, bus gold utensil and civil engineering framework
Basis。
(5) electrical insulation properties is strong
Buses of insulation tubes adopts closed shield insulation mode, and earthing of casing current potential is zero, owing to electric shield has: a. makes Electric Field Distribution uniform；B. controlling potential and restriction electric field；C. avoid producing shelf depreciation at insulating surface；D. conduct leakage current and charging current；E., dangerous contact voltage carrying out the characteristics such as protection, therefore this insulation tubular bus Electric Field Distribution with shielding is uniform, electrical insulation properties is strong。
(6) insulant heat-resistance coefficient is high
Buses of insulation tubes major insulation material adopts politef, can work, have excellent electric property and chemical stability in-250 DEG C～+250 DEG C, dielectric loss is little, fire-retardant, ageing-resistant, service life >=40 years。
(7) anti-electrical equipment vibration resistance is strong
Directly buses of insulation tubes is fixed on Steel Structure or on concrete support, cancels wall bushing and support insulator, there is stronger shock resistance。
(8) not by environmental disturbances, reliability is high
The every of buses of insulation tubes is lock shield insulation mutually, internal without condensation generation, and eliminates extraneous moisture, dust and the ground connection caused by foreign object and phase fault, runs the reliability with height。
Accompanying drawing explanation
Fig. 1 is the front view of the present invention
Fig. 2 is the sectional view of the present invention
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described。
Example one
The circular shield isolated bus of a kind of 10KV as shown in the figure, including round conductor 1 and outer protective sleeve 2, the passage 4 of circle it is provided with in round conductor 1, round conductor 1 two ends are respectively stayed after 20cm at one layer of insulation screen 3 of conductive surface tight enclosure, wherein, insulation screen 3 is made up of insulating barrier 31 and screen layer 32, and insulating barrier 31 includes two-layer politef 311 and sheath shrinkable sleeve 312 from inside to outside, uniform coating silicon oil between politef 311 and sheath shrinkable sleeve 312。Hereafter 5cm is respectively stayed at each insulation screen 3 two ends, carry out second, third, the making of the 4th insulation screen, do outer protective sleeve 2 with polyolefin high polymer for material the 4th insulation screen is outer, and the 4th insulation screen is held braiding copper mesh 5 do grounding。
Its manufacture method is as follows:
1. round conductor two ends are respectively stayed after 20cm at one layer of aluminium foil of conductive surface tight enclosure as screen layer；
2. after aluminium foil outer wrap two-layer politef uniform coating silicon oil, at politef outer wrap sheath shrinkable sleeve as insulating barrier；
3. above-mentioned steps 1,2 can be considered first insulation screen, hereafter respectively stays 5cm at each insulation screen two ends, repeat step 1,2 carry out second, third, the making of the 4th insulation screen；
4. weave after copper mesh does grounding at the 4th layer of insulation screen outer wrap and hold the outer protective sleeve that a layer is material with polyolefin high polymer。
Example two
The circular shield isolated bus of a kind of 35KV as shown in the figure, including round conductor 1 and outer protective sleeve 2, the passage 4 of circle it is provided with in round conductor 1, round conductor 1 two ends are respectively stayed after 20cm at one layer of insulation screen 3 of conductive surface tight enclosure, wherein, insulation screen 3 is made up of insulating barrier 31 and screen layer 32, and insulating barrier 31 includes two-layer politef 311 and sheath shrinkable sleeve 312 from inside to outside, uniform coating silicon oil between politef 311 and sheath shrinkable sleeve 312。Hereafter 5cm is respectively stayed at each insulation screen 3 two ends, carry out second, third, the making of the four, the five, the six, the 7th, the 8th insulation screen, do outer protective sleeve 2 with polyolefin high polymer for material the 8th insulation screen is outer, and the 8th insulation screen is held braiding copper mesh 5 do grounding。
Its manufacture method is as follows:
1. round conductor two ends are respectively stayed after 20cm at one layer of aluminium foil of conductive surface tight enclosure as screen layer；
2. after aluminium foil outer wrap two-layer politef uniform coating silicon oil, at politef outer wrap sheath shrinkable sleeve as insulating barrier；
3. above-mentioned steps 1,2 can be considered first insulation screen, hereafter respectively stays 5cm at each insulation screen two ends, repeat step 1,2 carry out second, third, the making of the four, the five, the six, the seven, the 8th insulation screens；
4. weave after copper mesh does grounding at the 8th layer of insulation screen outer wrap and hold the outer protective sleeve that a layer is material with polyolefin high polymer。
In sum, the invention have the benefit that
(1) current-carrying capacity is big
Buses of insulation tubes is hollow conductor, and surface area is big, and conductive surface electric current distribution is uniform。Therefore, isolated bus is particularly suitable for the loop that operating current is big。
(2) kelvin effect is low, power loss is little
The skin effect coefficient of buses of insulation tubes is low, Kf≤1, and AC resistance is little, thus the power loss of bus is little。According to multi-slice rectangle conductor, along with the increase of sheet number, skin effect coefficient continues to increase, and the effective-current amount of unit section declines, and between sheet and sheet, CURRENT DISTRIBUTION is uneven, and added losses strengthen, and radiating condition is poor。
(3) radiating condition is good, temperature rise is low
Buses of insulation tubes is hollow conductor, bus internal diameter air channel energy self-assembling formation hot-air convection, and the draught head of indoor and outdoors, energy self-assembling formation hot-air convection, radiating condition is good, thus substantially increasing power supplying efficiency。
(4) allowable stress [σ] is big, and mechanical strength is high
The allowable stress of buses of insulation tubes is 4 times of rectangular bus bar, and the short circuit current that can bear is big, and mechanical strength is high so that bus supports span and strengthens。When 50KA short circuit current, the unsettled span of Φ 100 × 5mm isolated bus reaches 9 meters, bus bar cupport is utilized to support, the span of bus can reach 13 meters, owing to bus span is big, altitude chamber can be directly entered be connected with indoor current-limiting reactor or 10 KV switch cabinets, decrease corresponding support insulator, bus gold utensil and civil engineering framework
Basis。
(5) electrical insulation properties is strong
Buses of insulation tubes adopts closed shield insulation mode, and earthing of casing current potential is zero, owing to electric shield has: a. makes Electric Field Distribution uniform；B. controlling potential and restriction electric field；C. avoid producing shelf depreciation at insulating surface；D. conduct leakage current and charging current；E., dangerous contact voltage carrying out the characteristics such as protection, therefore this insulation tubular bus Electric Field Distribution with shielding is uniform, electrical insulation properties is strong。
(6) insulant heat-resistance coefficient is high
Buses of insulation tubes major insulation material adopts politef, can work, have excellent electric property and chemical stability in-250 DEG C～+250 DEG C, dielectric loss is little, fire-retardant, ageing-resistant, service life >=40 years。
(7) anti-electrical equipment vibration resistance is strong
Directly buses of insulation tubes is fixed on Steel Structure or on concrete support, cancels wall bushing and support insulator, there is stronger shock resistance。
(8) not by environmental disturbances, reliability is high
The every of buses of insulation tubes is lock shield insulation mutually, internal without condensation generation, and eliminates extraneous moisture, dust and the ground connection caused by foreign object and phase fault, runs the reliability with height。
Claims (2)
1. a circular shield isolated bus, it is characterized by, including round conductor and outer protective sleeve, the passage of circle it is provided with in round conductor, round conductor two ends are respectively stayed after 20cm at one layer of insulation screen of conductive surface tight enclosure, and wherein, insulation screen is made up of insulating barrier and screen layer, insulating barrier includes two-layer politef and sheath shrinkable sleeve from inside to outside, uniform coating silicon oil between politef and sheath shrinkable sleeve；Hereafter 5cm is respectively stayed at each insulation screen two ends, carry out second, third, the making of the 4th insulation screen, do outer protective sleeve with polyolefin high polymer for material the 4th insulation screen is outer, and the 4th insulation screen is held braiding copper mesh do grounding；The manufacture method of described circular shield isolated bus is as follows:
(1). round conductor two ends are respectively stayed after 20cm at one layer of aluminium foil of conductive surface tight enclosure as screen layer；
(2). after aluminium foil outer wrap two-layer politef uniform coating silicon oil, at politef outer wrap sheath shrinkable sleeve as insulating barrier；
(3). above-mentioned steps 1,2 can be considered first insulation screen, hereafter respectively stays 5cm at each insulation screen two ends, repeat step 1,2 carry out second, third, the making of the 4th insulation screen；
(4). weave after copper mesh does grounding at the 4th layer of insulation screen outer wrap and hold the outer protective sleeve that a layer is material with polyolefin high polymer。
2. a circular shield isolated bus, it is characterized by, including round conductor and outer protective sleeve, the passage of circle it is provided with in round conductor, round conductor two ends are respectively stayed after 20cm at one layer of insulation screen of conductive surface tight enclosure, and wherein, insulation screen is made up of insulating barrier and screen layer, insulating barrier includes two-layer politef and sheath shrinkable sleeve from inside to outside, uniform coating silicon oil between politef and sheath shrinkable sleeve；Hereafter 5cm is respectively stayed at each insulation screen two ends, carry out second, third, the making of the four, the five, the six, the 7th, the 8th insulation screen, do outer protective sleeve with polyolefin high polymer for material the 8th insulation screen is outer, and the 8th insulation screen is held braiding copper mesh do grounding；The manufacture method of described circular shield isolated bus is as follows:
(1). round conductor two ends are respectively stayed after 20cm at one layer of aluminium foil of conductive surface tight enclosure as screen layer；
(2). after aluminium foil outer wrap two-layer politef uniform coating silicon oil, at politef outer wrap sheath shrinkable sleeve as insulating barrier；
(3). above-mentioned steps 1,2 can be considered first insulation screen, hereafter respectively stays 5cm at each insulation screen two ends, repeat step 1,2 carry out second, third, the making of the four, the five, the six, the seven, the 8th insulation screens；
(4). weave after copper mesh does grounding at the 8th layer of insulation screen outer wrap and hold the outer protective sleeve that a layer is material with polyolefin high polymer。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310227732.XA CN103366872B (en) | 2013-06-07 | 2013-06-07 | A kind of circular shield isolated bus |
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| CN201310227732.XA CN103366872B (en) | 2013-06-07 | 2013-06-07 | A kind of circular shield isolated bus |
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| CN103366872A CN103366872A (en) | 2013-10-23 |
| CN103366872B true CN103366872B (en) | 2016-06-22 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106057294A (en) * | 2016-05-25 | 2016-10-26 | 江苏中鹏电气有限公司 | Tubular composite shielded and insulated bus and making process thereof |
| CN105931699A (en) * | 2016-05-25 | 2016-09-07 | 江苏中鹏电气有限公司 | Tubular type wind power bus-bar with rated voltage of 690/1,000V, installation device and bus-bar production process thereof |
| CN111334048B (en) * | 2019-12-31 | 2022-04-15 | 江苏江扬电缆有限公司 | Silicone rubber sheath and cable prepared by applying same |
| CN111138862B (en) * | 2019-12-31 | 2022-04-19 | 江苏江扬电缆有限公司 | Silicone rubber belt and underwater cable comprising same |
| CN111128463B (en) * | 2019-12-31 | 2021-07-27 | 江苏江扬电缆有限公司 | Power cable for ocean exploration and production process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201732615U (en) * | 2009-12-30 | 2011-02-02 | 安徽精工电缆桥架有限公司 | Crosslinked insulated copper tube bus |
| CN201773637U (en) * | 2010-04-29 | 2011-03-23 | 陈炜 | Composite insulating tubular bus |
| CN202584884U (en) * | 2012-05-09 | 2012-12-05 | 淄博城通电气有限公司 | Insulation shielding type tubular bus |
| CN202871393U (en) * | 2012-10-30 | 2013-04-10 | 江苏士林电气设备有限公司 | Circular shielding insulating tubular bus |
| CN203422999U (en) * | 2013-06-07 | 2014-02-05 | 江苏士林电气设备有限公司 | Circular shielding insulating bus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120168197A1 (en) * | 2011-01-04 | 2012-07-05 | Primecon Technology Ltd. | Coaxial cable structure with extruded shielding layer |
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- 2013-06-07 CN CN201310227732.XA patent/CN103366872B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201732615U (en) * | 2009-12-30 | 2011-02-02 | 安徽精工电缆桥架有限公司 | Crosslinked insulated copper tube bus |
| CN201773637U (en) * | 2010-04-29 | 2011-03-23 | 陈炜 | Composite insulating tubular bus |
| CN202584884U (en) * | 2012-05-09 | 2012-12-05 | 淄博城通电气有限公司 | Insulation shielding type tubular bus |
| CN202871393U (en) * | 2012-10-30 | 2013-04-10 | 江苏士林电气设备有限公司 | Circular shielding insulating tubular bus |
| CN203422999U (en) * | 2013-06-07 | 2014-02-05 | 江苏士林电气设备有限公司 | Circular shielding insulating bus |
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| CN103366872A (en) | 2013-10-23 |
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