CN103971798A - Overhead bare conductor expanding and reinforced insulation structure - Google Patents
Overhead bare conductor expanding and reinforced insulation structure Download PDFInfo
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- CN103971798A CN103971798A CN201410168598.5A CN201410168598A CN103971798A CN 103971798 A CN103971798 A CN 103971798A CN 201410168598 A CN201410168598 A CN 201410168598A CN 103971798 A CN103971798 A CN 103971798A
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- hole enlargement
- parts
- enlargement parts
- bare conductor
- overhead bare
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Abstract
An overhead bare conductor expanding and reinforced insulation structure comprises an upper expanding component, a lower expanding component and an elastic buckle for connecting the upper expanding component and the lower expanding component, wherein the upper expanding component and the lower expanding component are the same in structure and are clamped on the surface of the positions, needing to be protected, of an overhead bare conductor in a longitudinal symmetry mode; the outer surface of the upper expanding component and the outer surface of the lower expanding component are coated with modified epoxy insulation layers. The expanded conductor is of a hollow structure. The structure shields the single-line curvature and burrs on the surface of the overhead bare conductor, the equivalent radius of the smooth and large conductor is obtained, the corona on the surface of the bare conductor is thoroughly eliminated, and the safety distance is greatly reduced. The almost permanent safety protection effect can be obtained due to the strategy of the expanded conductor and an external reinforced solid insulation layer.
Description
Technical field
The present invention relates to overhead bare conductor and augment insulation technology field, be specifically related to a kind of overhead bare conductor hole enlargement reinforced insulation structure.
Background technology
In recent years, along with the bad weathers such as violent storm and operation of power networks environment continuous deterioration, ultra-high-tension power transmission line due to be subjected to thunderbolt, outside destroy, bird pest, pollution flashover, foreign matter overlap joint (kite, aluminium. paper tinsel plastics etc.) etc. the Power System Shortcuts that causes and the fault of electric discharge again and again occur, high-tension line all will carry out the interruption maintenance of 2-3 time every year, each have a large amount of circuit foreign matters to need to process, this has not only brought very large impact to the safe and stable operation of system, has more caused great economic loss.
Solution to this problem at present, main concentrating carried out part to high pressure plain conductor and augmented the safe and stable operation that the method for insulation improves system: (1) FJRD can be used as part and augments insulating material, coated for the poor conductive surface of insulation level by part.But the method construction is complicated, pyrocondensation belt is wound around by artificial, and quantities is large and inhomogeneous.(2) also have machine silicon flame-retarded heat-conducting High-Voltage Insulation coating is evenly coated in to plain conductor surface to improve the insulating capacity of plain conductor.(3) have researcher to introduce at composite insulator high-pressure side installing insulating sheath and improve high-pressure side electric field, object is to improve discharge inception voltage and the pollution flashover voltage of composite insulator.Analyze and show, these three kinds of method short-terms may have certain effect, reduce to a certain extent when have earth electrode near time probability of malfunction, but all cannot effectively eliminate single conductor radius of curvature electric field little and wire burr place concentrates, only can simply the local highfield of conductive surface be extended to additional insulating surface, through local Corona Corrosion of short time and outdoor environment, may cause minor insulation to come off.In addition, this class reinforced insulation measure is owing to being that existing working line is carried out, (1) and the insulation lapping gap of (3) kind method inevitable; (2) kind measure insulating surface corona is inevitable, and all has insulation both sides and the rapid corrosion of plain conductor interface conductive line surfaces corona to end organic insulation, so insulation life is all very short.
Further analyze, take that three kinds of measures can be received reliably, long-life reinforced insulation effect, be respectively: the surperficial single line curvature of (1) shielding plain conductor and burr; (2) obtain smooth, larger conductor equivalent redius, could thoroughly eliminate plain conductor surface corona; (3) the outside solid insulating layer that strengthens.It is almost permanent effect that this reinforced insulation strategy can obtain.But this kind of reinforced insulation structure not yet occurs in the application of China, so China needs the novel hole enlargement reinforced insulation structure that exploitation has independent intellectual property right badly.
Summary of the invention
The problem existing in order to solve above-mentioned prior art, the object of the present invention is to provide a kind of overhead bare conductor hole enlargement reinforced insulation structure, has shielding corona, reduces critical corona distance, improves dielectric strength, the feature of long service life.
In order to realize foregoing invention object, the technical scheme that the present invention takes is:
An overhead bare conductor hole enlargement reinforced insulation structure, comprises hole enlargement parts 1, lower hole enlargement parts 2 and the Elastic buckle 3 that connects upper hole enlargement parts 1 and lower hole enlargement parts 2, described upper hole enlargement parts 1 are identical with lower hole enlargement parts 2 structures, are laterally zygomorphicly connected to the surface that overhead bare conductor needs protective position, the outer surface of described upper hole enlargement parts 1 and lower hole enlargement parts 2 is coated with modified epoxy insulating barrier 4, upper hole enlargement parts 1 and lower hole enlargement parts 2 are hollow structure, if respectively offer two screwed holes 7 on the hemispherical dome structure at upper hole enlargement parts 1 two ends, on the hemispherical dome structure at lower hole enlargement parts 2 two ends, respectively offer two small through hole 8 and be opened in the large through-hole 9 under small through hole 8, or on the hemispherical dome structure at lower hole enlargement parts 2 two ends, respectively offer two screwed holes 7, on the hemispherical dome structure at upper hole enlargement parts 1 two ends, respectively offer two small through hole 8 and be opened in the large through-hole 9 under small through hole 8, described Elastic buckle 3 is the integrated structure of cylinder and cone, in the junction of cylinder and cone with platform 11, described cylinder is provided with thread segment 10 away from one end of cone, and have groove on the top of thread segment 10, form the adjusting mouth 12 that regulates upper hole enlargement parts 1 and 2 clearance distance of lower hole enlargement parts, at the other end of cylindrical thread segment 10 and the middle part of cone, have weaken Elastic buckle 3 cone part rigidity to facilitate the groove through small through hole 8 by cone, when described Elastic buckle 3 connects after upper hole enlargement parts 1 and lower hole enlargement parts 2, described platform 11 is stuck in the junction of the large through-hole 9 under small through hole 8.
The main body of described upper hole enlargement parts 1 and lower hole enlargement parts 2 is semi-cylindrical, and two ends are hemispherical dome structure.
The main body of described upper hole enlargement parts 1 and lower hole enlargement parts 2 is semi-cylindrical, and one end is hemispherical dome structure.
Described upper hole enlargement parts 1 and lower hole enlargement parts 2 are semi-cylindrical.
Described upper hole enlargement parts 1 and lower hole enlargement parts 2 are hemisphere shape.
The material of described upper hole enlargement parts 1 and lower hole enlargement parts 2 is aluminium alloy.
The material of described Elastic buckle 3 is copper.
The wall thickness at described upper hole enlargement parts 1 and lower hole enlargement parts 2 inner hollow structure places is less than 5mm.
The thickness of described modified epoxy insulating barrier 4 is 0.5～1mm.
Compared to the prior art, tool has the following advantages in the present invention:
1, the invention solves following three problems: (1) has shielded overhead bare conductor surface single line curvature and burr; (2) obtain smooth, larger conductor equivalent redius, thoroughly eliminate plain conductor surface corona; (3) the outside solid insulating layer that strengthens, it is almost permanent effect that reinforced insulation strategy can obtain.
2, the present invention has reduced the critical corona distance of overhead bare conductor, when having earth electrode near plain conductor, has reduced to occur the danger of corona discharge.
3, in the present invention, hole enlargement parts and lower hole enlargement parts can be installed in the situation that plain conductor is not dismantled, and structure is connected to Len req, and easy construction, can change.
4, the present invention is owing to being that aluminum alloy body structure can be used for a long time under rugged environment, can breakaway, can not come off, and can not corrode, insulation level can not reduce.
Accompanying drawing explanation
Fig. 1 is that the embodiment of the present invention one hole enlargement parts are used state diagram front view.
Fig. 2 is the embodiment of the present invention one hole enlargement parts vertical view.
Fig. 3 is that a kind of structure hole enlargement parts that the embodiment of the present invention two is used are used state diagram front view.
Fig. 4 is that the another kind of structure hole enlargement parts that the embodiment of the present invention two is used are used state diagram front view.
Fig. 5 is that the embodiment of the present invention three hole enlargement parts are used state diagram front view.
Fig. 6 is the front view of Elastic buckle.
Fig. 7 when hole enlargement reinforced insulation structure is not installed, the radius of high pressure plain conductor be and and earth electrode between critical corona apart from schematic diagram.
Fig. 8 when hole enlargement reinforced insulation structure is installed, the effective radius of high pressure plain conductor be and and earth electrode between critical corona apart from schematic diagram.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Embodiment mono-
As Fig. 1, shown in Fig. 2 and Fig. 6, a kind of overhead bare conductor hole enlargement of the present embodiment reinforced insulation structure, comprise hole enlargement parts 1, lower hole enlargement parts 2 and the Elastic buckle 3 that connects upper hole enlargement parts 1 and lower hole enlargement parts 2, described upper hole enlargement parts 1 are identical with lower hole enlargement parts 2 structures, laterally zygomorphicly be connected to upper surface and the lower surface that overhead bare conductor needs reinforced insulation place, can in the situation that not dismantling, high pressure plain conductor 5 be arranged on high pressure plain conductor 5 surfaces to increase its effective radius, reach the effect of shielding corona, as required reinforced insulation structure of the present invention is connected to Len req, easy construction, and can change.The outer surface of described upper hole enlargement parts 1 and lower hole enlargement parts 2 is coated with modified epoxy insulating barrier 4, main body is cylindric, its inside is hollow structure 6, to reduce overall structure weight, two ends are hemispherical dome structure, if respectively offer two screwed holes 7 on the hemispherical dome structure at upper hole enlargement parts 1 two ends, on the hemispherical dome structure at lower hole enlargement parts 2 two ends, respectively offer two small through hole 8 and be opened in the large through-hole 9 under small through hole 8, or on the hemispherical dome structure at lower hole enlargement parts 2 two ends, respectively offer two screwed holes 7, on the hemispherical dome structure at upper hole enlargement parts 1 two ends, respectively offer two small through hole 8 and be opened in the large through-hole 9 under small through hole 8, can also screwed hole 7 is arranged in a crossed manner with small through hole 8 and large through-hole 9, described Elastic buckle 3 is the integrated structure of cylinder and cone, in the junction of cylinder and cone with platform 11, described cylinder is provided with thread segment 10 away from one end of cone, and have groove on the top of thread segment 10, form the adjusting mouth 12 that available screwdriver regulates upper hole enlargement parts 1 and 2 clearance distance of lower hole enlargement parts, at the other end of cylindrical thread segment 10 and the middle part of cone, have weaken Elastic buckle 3 cone part rigidity to facilitate the groove through small through hole 8 by cone, when described Elastic buckle 3 connects after upper hole enlargement parts 1 and lower hole enlargement parts 2, described platform 11 is stuck in the junction of the large through-hole 9 under small through hole 8.
Embodiment bis-
As shown in Figure 3 and Figure 4, a kind of overhead bare conductor hole enlargement of the present embodiment reinforced insulation structure, other structure is with embodiment mono-, difference is: the main body of upper hole enlargement parts 1 and lower hole enlargement parts 2 is semi-cylindrical, one end is hemispherical dome structure, or upper hole enlargement parts 1 and lower hole enlargement parts 2 are semi-cylindrical.When this kind of structure used, upper hole enlargement parts 1 and lower hole enlargement parts 2 as shown in Figure 4 can be connected in series a plurality of as required, but the two ends after serial connection must be connected in series upper hole enlargement parts 1 and the lower hole enlargement parts 2 of structure as shown in Figure 3, and hemispherical dome structure one end will be placed in outermost end.
Embodiment tri-
As shown in Figure 5, a kind of overhead bare conductor hole enlargement of the present embodiment reinforced insulation structure, other structure is with embodiment mono-, and difference is: described upper hole enlargement parts 1 and lower hole enlargement parts 2 are hemisphere shape.During use, can be connected in series as required a plurality of.
As the preferred embodiment of the present invention, the material of described upper hole enlargement parts 1 and lower hole enlargement parts 2 is aluminium alloy.
As the preferred embodiment of the present invention, the material of described Elastic buckle 3 is copper.
As the preferred embodiment of the present invention, the wall thickness at described upper hole enlargement parts 1 and lower hole enlargement parts 2 inner hollow structure places is less than 5mm.
As the preferred embodiment of the present invention, the thickness of described modified epoxy insulating barrier 4 is 0.5～1mm.
Operation principle of the present invention is: high pressure plain conductor 5 is through the hole enlargement reinforced insulation structure of upper hole enlargement parts 1 and lower hole enlargement parts 2 compositions, high pressure plain conductor 5 has electrical contact with hole enlargement reinforced insulation structure, both are equipotential, thereby increased the effective radius of high pressure plain conductor 5, improved the critical corona distance of high pressure plain conductor 5.
As shown in Figure 7, when hole enlargement reinforced insulation structure is not installed, the radius of high pressure plain conductor is r
0, the critical corona distance between high pressure plain conductor and earth electrode is R
1, maximum field E
maxthe position occurring is plain conductor outer surface, can be represented by following formula.
In formula: U-high pressure plain conductor rating operating voltage, r
0-high pressure plain conductor radius, R
1-critical corona distance
As shown in Figure 8, install after hole enlargement reinforced insulation structure, the effective radius hole enlargement of high pressure plain conductor 5 is R
0, the critical corona distance between high pressure plain conductor 5 and earth electrode is R
2, maximum field E
maxthe position occurring is modified epoxy insulating barrier 4 outer surfaces, and following formula represents.
In formula: U-high pressure plain conductor rating operating voltage, R
0the outer radius of-aluminium alloy structure, the thickness of Δ R-epoxy insulation layer, ε
airthe relative dielectric constant of-air, ε
1the relative dielectric constant of-epoxy insulation layer, R
2-critical corona distance
Can find out, after hole enlargement, the critical corona distance of high pressure plain conductor is by R
1be reduced to R
2.
Installation process of the present invention is: when hole enlargement enhancing structure is installed, need in advance Elastic buckle 3 to be coordinated with the screwed hole 7 of upper hole enlargement parts 1 and/or hole enlargement parts 2, upper hole enlargement parts 1 and/or hole enlargement parts 2 are respectively installed two Elastic buckles 3 above, then in the situation that not dismantling high pressure plain conductor 5, the upper hole enlargement parts 1 of mounted Elastic buckle 3 and upper hole enlargement parts 2 are placed on high pressure plain conductor, by gap upward, then Elastic buckle 3 is tipped in small through hole 8, complete the installation that single hole enlargement strengthens structure, then according to aforesaid operations, a plurality of single hole enlargements are strengthened to textural association together successively, to Len req.
Claims (9)
1. an overhead bare conductor hole enlargement reinforced insulation structure, is characterized in that: comprise hole enlargement parts (1), lower hole enlargement parts (2) and the Elastic buckle (3) that connects upper hole enlargement parts (1) and lower hole enlargement parts (2), described upper hole enlargement parts (1) are identical with lower hole enlargement parts (2) structure, are laterally zygomorphicly connected to the surface that overhead bare conductor needs protective position, the outer surface of described upper hole enlargement parts (1) and lower hole enlargement parts (2) is coated with modified epoxy insulating barrier (4), upper hole enlargement parts (1) and lower hole enlargement parts (2) are hollow structure, if respectively offer two screwed holes (7) on the hemispherical dome structure at upper hole enlargement parts (1) two ends, on the hemispherical dome structure at lower hole enlargement parts (2) two ends, respectively offer two small through hole (8) and be opened in the large through-hole (9) under small through hole (8), or on the hemispherical dome structure at lower hole enlargement parts (2) two ends, respectively offer two screwed holes (7), on the hemispherical dome structure at upper hole enlargement parts (1) two ends, respectively offer two small through hole (8) and be opened in the large through-hole (9) under small through hole (8), described Elastic buckle (3) is the integrated structure of cylinder and cone, in the junction of cylinder and cone with platform (11), described cylinder is provided with thread segment (10) away from one end of cone, and have groove on the top of thread segment (10), form the adjusting mouth (12) that regulates clearance distance between upper hole enlargement parts (1) and lower hole enlargement parts (2), at the other end of cylindrical thread segment (10) and the middle part of cone, have weaken Elastic buckle (3) cone part rigidity to facilitate the groove through small through hole (8) by cone, in described Elastic buckle (3) connection after hole enlargement parts (1) and lower hole enlargement parts (2), described platform (11) is stuck in the junction of the large through-hole (9) under small through hole (8).
2. a kind of overhead bare conductor hole enlargement reinforced insulation structure according to claim 1, is characterized in that: the main body of described upper hole enlargement parts (1) and lower hole enlargement parts (2) is semi-cylindrical, and two ends are hemispherical dome structure.
3. a kind of overhead bare conductor hole enlargement reinforced insulation structure according to claim 1, is characterized in that: the main body of described upper hole enlargement parts (1) and lower hole enlargement parts (2) is semi-cylindrical, and one end is hemispherical dome structure.
4. a kind of overhead bare conductor hole enlargement reinforced insulation structure according to claim 1, is characterized in that: described upper hole enlargement parts (1) and lower hole enlargement parts (2) are semi-cylindrical.
5. a kind of overhead bare conductor hole enlargement reinforced insulation structure according to claim 1, is characterized in that: described upper hole enlargement parts (1) and lower hole enlargement parts (2) are hemisphere shape.
6. a kind of overhead bare conductor hole enlargement reinforced insulation structure according to claim 1, is characterized in that: the material of described upper hole enlargement parts (1) and lower hole enlargement parts (2) is aluminium alloy.
7. a kind of overhead bare conductor hole enlargement reinforced insulation structure according to claim 1, is characterized in that: the material of described Elastic buckle (3) is copper.
8. a kind of overhead bare conductor hole enlargement reinforced insulation structure according to claim 1, is characterized in that: the wall thickness at described upper hole enlargement parts (1) and lower hole enlargement parts (2) inner hollow structure place is less than 5mm.
9. a kind of overhead bare conductor hole enlargement reinforced insulation structure according to claim 1, is characterized in that: the thickness of described modified epoxy insulating barrier (4) is 0.5～1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410168598.5A CN103971798B (en) | 2014-04-24 | 2014-04-24 | A kind of expanding reinforced insulation structure of overhead bare conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410168598.5A CN103971798B (en) | 2014-04-24 | 2014-04-24 | A kind of expanding reinforced insulation structure of overhead bare conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103971798A true CN103971798A (en) | 2014-08-06 |
| CN103971798B CN103971798B (en) | 2016-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410168598.5A Expired - Fee Related CN103971798B (en) | 2014-04-24 | 2014-04-24 | A kind of expanding reinforced insulation structure of overhead bare conductor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4394534A (en) * | 1980-01-14 | 1983-07-19 | Electric Power Research Institute, Inc. | Cryogenic cable and method of making same |
| CN101488375A (en) * | 2008-12-05 | 2009-07-22 | 江苏永鼎股份有限公司 | Aluminum pipe supporting type heat resisting diameter enlarging bus bar |
| CN203871092U (en) * | 2014-04-24 | 2014-10-08 | 国家电网公司 | Novel sheath structure for improving insulating property of overhead bare conductor |
-
2014
- 2014-04-24 CN CN201410168598.5A patent/CN103971798B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4394534A (en) * | 1980-01-14 | 1983-07-19 | Electric Power Research Institute, Inc. | Cryogenic cable and method of making same |
| CN101488375A (en) * | 2008-12-05 | 2009-07-22 | 江苏永鼎股份有限公司 | Aluminum pipe supporting type heat resisting diameter enlarging bus bar |
| CN203871092U (en) * | 2014-04-24 | 2014-10-08 | 国家电网公司 | Novel sheath structure for improving insulating property of overhead bare conductor |
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| Publication number | Publication date |
|---|---|
| CN103971798B (en) | 2016-07-13 |
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