CN203422999U - Circular shielding insulating bus - Google Patents
Circular shielding insulating bus Download PDFInfo
- Publication number
- CN203422999U CN203422999U CN201320329992.3U CN201320329992U CN203422999U CN 203422999 U CN203422999 U CN 203422999U CN 201320329992 U CN201320329992 U CN 201320329992U CN 203422999 U CN203422999 U CN 203422999U
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- insulation
- bus
- screen
- polytetrafluoroethylene
- circular
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The utility model relates to a circular shielding insulating bus which includes a circular conductor and an outer layer sheath, wherein a plurality of insulating shielding layers are arranged between the circular conductor and the outer layer sheath and consist of insulating layers and shielding layers; each insulating layer comprises two polytetrafluoroethylene layers and a thermal shrinkage sheath from inside to outside; and silicone oil is uniformly brushed between the polytetrafluoroethylene and the thermal shrinkage sheath. The circular shielding insulating bus is high in carrying capacity, good in heat dissipation, low in temperature rise, strong in electric insulation performance, free of environmental disturbance and high in reliability.
Description
Technical field
The utility model belongs to High-Voltage Electrical Appliances field, is specifically related to a kind of circular shielding insulation bus.
Background technology
Development along with domestic economy, the power load of each transformer station is surged thereupon, system running current is increasing, load more and more concentrated, the main transformer capacity of transformer station is also increasing, and in engineering, adopted the connected mode of multi-disc rectangle busbars more or directly used cable to connect in the past, these need not well adapt to the working method of large electric current (more than 3000A), cause that supplementary load loss are large, CURRENT DISTRIBUTION is uneven, skin effect coefficient increases phenomenons such as causing current capacity decline and contact heating more and more obvious simultaneously.
Domestic bus, through technique improvement, makes insulating barrier mostly all adopt polytetrafluoroethylene to hold.The insulation processing that the shortcoming of isolated bus connects in the middle of being exactly mainly, single pipe mother's insulation is all to carry out before dispatching from the factory, transition joint be exactly for the single pipe in scene female with the docking of single pipe mother, after having docked, do again the insulation processing of transition joint, but the humidity of surrounding environment and temperature all can not meet, even manual hold time may bring impurity into, make to manage female electrical insulation properties and greatly reduce.
Utility model content
Technical problem to be solved in the utility model is the circular shielding insulation bus for above drawback provides that a kind of ampacity is large, good heat dissipation, temperature rise are low, electrical insulation properties by force, is not subject to environmental interference, reliability is high.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A shielding insulation bus, comprises round conductor and outer protective sleeve, wherein, is provided with multilayer insulation screen between described round conductor and outer protective sleeve, and described insulation screen length is less than round conductor length.
Above-mentioned a kind of circular shielding insulation bus, wherein, described insulation screen is comprised of insulating barrier and screen, and described insulating barrier comprises two-layer polytetrafluoroethylene and sheath shrinkable sleeve from inside to outside, even coating silicon oil between polytetrafluoroethylene and sheath shrinkable sleeve.
Above-mentioned a kind of circular shielding insulation bus, wherein, the length of every layer of described insulation screen is evenly successively decreased from inside to outside.
Above-mentioned a kind of circular shielding insulation bus, wherein, is provided with passage in described round conductor.
The beneficial effects of the utility model are:
(1) ampacity is large
Buses of insulation tubes is hollow conductor, and surface area is large, and conductive surface electric current distribution is even.Therefore, isolated bus is particularly suitable for the loop that operating current is large.
(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, thereby the power loss of bus is little.If employing multi-slice rectangle conductor, along with the increase of sheet number, skin effect coefficient continues to increase, and the effective-current amount in unit cross section declines, and between sheet and sheet, CURRENT DISTRIBUTION is inhomogeneous, and supplementary load loss 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, thereby has greatly improved power supplying efficiency.
(4) allowable stress [σ] is large, 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 large, and mechanical strength is high, makes bus support span and strengthens.The in the situation that of 50KA short circuit current, the unsettled span of Φ 100 * 5mm isolated bus reaches 9 meters, utilize bus bar cupport to support, the span of bus can reach 13 meters, because bus span is large, can directly enter hyperbaric chamber and be connected with indoor current limiting reactor or 10 KV switch cabinets, reduce corresponding post 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, because electric shield has: a. makes Electric Field Distribution even; B. control current potential and restriction electric field; C. avoid producing partial discharge at insulating surface; D. conduct leakage current and charging current; E. to characteristics such as dangerous touch voltage protect, therefore the insulation tubular bus Electric Field Distribution of this band shielding is even, electrical insulation properties is strong.
(6) insulating material heat-resistance coefficient is high
Buses of insulation tubes main insulation material adopts polytetrafluoroethylene, can in-250 ℃～+ 250 ℃, work, and has good electric property and chemical stability, and dielectric loss is little, fire-retardant, ageing-resistant, useful life >=40 year.
(7) anti-electrical equipment vibration resistance is strong
Directly buses of insulation tubes is fixed on steel framework or on concrete support, cancels wall bushing and post insulator, there is stronger anti-vibration ability.
(8) be not subject to environmental interference, reliability is high
The every of buses of insulation tubes is lock shield insulation mutually, inner without condensation generation, and eliminated extraneous moisture, the caused ground connection of dust and foreign object and phase fault, and operation has the reliability of height.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model
Fig. 2 is cutaway view of the present utility model
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
Example one
The circular shielding insulation bus of a kind of 10KV as shown in the figure, comprise round conductor 1 and outer protective sleeve 2, in round conductor 1, be provided with circular passage 4, round conductor 1 two ends closely hold one deck insulation screen 3 at conductive surface after respectively staying 20cm, wherein, insulation screen 3 is comprised of insulating barrier 31 and screen 32, and insulating barrier 31 comprises two-layer polytetrafluoroethylene 311 and sheath shrinkable sleeve 312 from inside to outside, even coating silicon oil between polytetrafluoroethylene 311 and sheath shrinkable sleeve 312.After this at each insulation screen 3 two ends, respectively stay 5cm, carry out second, third, the making of the 4th insulation screen, the polyolefin high polymer of take outside the 4th insulation screen is done outer protective sleeve 2 as material, and the 4th insulation screen held to braiding copper mesh 5 does grounding.
Its manufacture method is as follows:
1. round conductor two ends closely hold one deck aluminium foil as screen at conductive surface after respectively staying 20cm;
2. at aluminium foil, hold outward after two-layer polytetrafluoroethylene even coating silicon oil, at polytetrafluoroethylene, hold sheath shrinkable sleeve outward as insulating barrier;
3. above-mentioned steps 1,2 can be considered first insulation screen, after this at each insulation screen two ends, respectively stays 5cm, repeating step 1,2 carry out second, third, the making of the 4th insulation screen;
4. at the 4th layer of insulation screen, holding braiding copper mesh outward holds one deck after doing grounding and take the outer protective sleeve that polyolefin high polymer is material.
Example two
The circular shielding insulation bus of a kind of 35KV as shown in the figure, comprise round conductor 1 and outer protective sleeve 2, in round conductor 1, be provided with circular passage 4, round conductor 1 two ends closely hold one deck insulation screen 3 at conductive surface after respectively staying 20cm, wherein, insulation screen 3 is comprised of insulating barrier 31 and screen 32, and insulating barrier 31 comprises two-layer polytetrafluoroethylene 311 and sheath shrinkable sleeve 312 from inside to outside, even coating silicon oil between polytetrafluoroethylene 311 and sheath shrinkable sleeve 312.After this at each insulation screen 3 two ends, respectively stay 5cm, carry out second, third, the making of the 4th, the 5th, the 6th, the 7th, the 8th insulation screen, the polyolefin high polymer of take outside the 8th insulation screen is done outer protective sleeve 2 as material, and the 8th insulation screen held to braiding copper mesh 5 does grounding.
Its manufacture method is as follows:
1. round conductor two ends closely hold one deck aluminium foil as screen at conductive surface after respectively staying 20cm;
2. at aluminium foil, hold outward after two-layer polytetrafluoroethylene even coating silicon oil, at polytetrafluoroethylene, hold sheath shrinkable sleeve outward as insulating barrier;
3. above-mentioned steps 1,2 can be considered first insulation screen, after this at each insulation screen two ends, respectively stays 5cm, repeating step 1,2 carry out second, third, the the the 4th, the 5th, the 6th, the 7th, the making of the 8th insulation screen;
4. at the 8th layer of insulation screen, holding braiding copper mesh outward holds one deck after doing grounding and take the outer protective sleeve that polyolefin high polymer is material.
In sum, the beneficial effects of the utility model are:
(1) ampacity is large
Buses of insulation tubes is hollow conductor, and surface area is large, and conductive surface electric current distribution is even.Therefore, isolated bus is particularly suitable for the loop that operating current is large.
(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, thereby the power loss of bus is little.If employing multi-slice rectangle conductor, along with the increase of sheet number, skin effect coefficient continues to increase, and the effective-current amount in unit cross section declines, and between sheet and sheet, CURRENT DISTRIBUTION is inhomogeneous, and supplementary load loss 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, thereby has greatly improved power supplying efficiency.
(4) allowable stress [σ] is large, 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 large, and mechanical strength is high, makes bus support span and strengthens.The in the situation that of 50KA short circuit current, the unsettled span of Φ 100 * 5mm isolated bus reaches 9 meters, utilize bus bar cupport to support, the span of bus can reach 13 meters, because bus span is large, can directly enter hyperbaric chamber and be connected with indoor current limiting reactor or 10 KV switch cabinets, reduce corresponding post 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, because electric shield has: a. makes Electric Field Distribution even; B. control current potential and restriction electric field; C. avoid producing partial discharge at insulating surface; D. conduct leakage current and charging current; E. to characteristics such as dangerous touch voltage protect, therefore the insulation tubular bus Electric Field Distribution of this band shielding is even, electrical insulation properties is strong.
(6) insulating material heat-resistance coefficient is high
Buses of insulation tubes main insulation material adopts polytetrafluoroethylene, can in-250 ℃～+ 250 ℃, work, and has good electric property and chemical stability, and dielectric loss is little, fire-retardant, ageing-resistant, useful life >=40 year.
(7) anti-electrical equipment vibration resistance is strong
Directly buses of insulation tubes is fixed on steel framework or on concrete support, cancels wall bushing and post insulator, there is stronger anti-vibration ability.
(8) be not subject to environmental interference, reliability is high
The every of buses of insulation tubes is lock shield insulation mutually, inner without condensation generation, and eliminated extraneous moisture, the caused ground connection of dust and foreign object and phase fault, and operation has the reliability of height.
Claims (4)
1. a circular shielding insulation bus, comprises round conductor and outer protective sleeve, it is characterized by, and is provided with multilayer insulation screen between described round conductor and outer protective sleeve, and described insulation screen length is less than round conductor length.
2. a kind of circular shielding insulation bus as claimed in claim 1, it is characterized by, described insulation screen is comprised of insulating barrier and screen, and described insulating barrier comprises two-layer polytetrafluoroethylene and sheath shrinkable sleeve from inside to outside, even coating silicon oil between polytetrafluoroethylene and sheath shrinkable sleeve.
3. a kind of circular shielding insulation bus as claimed in claim 1, is characterized by, and the length of every layer of described insulation screen is evenly successively decreased from inside to outside.
4. a kind of circular shielding insulation bus as claimed in claim 1, is characterized by, and in described round conductor, is provided with passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320329992.3U CN203422999U (en) | 2013-06-07 | 2013-06-07 | Circular shielding insulating bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320329992.3U CN203422999U (en) | 2013-06-07 | 2013-06-07 | Circular shielding insulating bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203422999U true CN203422999U (en) | 2014-02-05 |
Family
ID=50022091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320329992.3U Expired - Fee Related CN203422999U (en) | 2013-06-07 | 2013-06-07 | Circular shielding insulating bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203422999U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103366872A (en) * | 2013-06-07 | 2013-10-23 | 江苏士林电气设备有限公司 | Circular shielding insulating bus and machining method thereof |
-
2013
- 2013-06-07 CN CN201320329992.3U patent/CN203422999U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103366872A (en) * | 2013-06-07 | 2013-10-23 | 江苏士林电气设备有限公司 | Circular shielding insulating bus and machining method thereof |
| CN103366872B (en) * | 2013-06-07 | 2016-06-22 | 江苏士林电气设备有限公司 | A kind of circular shield isolated bus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20170607 |