CN103971798B - A kind of expanding reinforced insulation structure of overhead bare conductor - Google Patents
A kind of expanding reinforced insulation structure of overhead bare conductor Download PDFInfo
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- CN103971798B CN103971798B CN201410168598.5A CN201410168598A CN103971798B CN 103971798 B CN103971798 B CN 103971798B CN 201410168598 A CN201410168598 A CN 201410168598A CN 103971798 B CN103971798 B CN 103971798B
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- bare conductor
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- 239000004020 conductor Substances 0.000 title claims abstract description 56
- 238000009413 insulation Methods 0.000 title claims abstract description 37
- 239000004593 Epoxy Substances 0.000 claims abstract description 10
- 230000004888 barrier function Effects 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 230000003313 weakening effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002708 enhancing effect Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
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- 230000007257 malfunction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Abstract
A kind of expanding reinforced insulation structure of overhead bare conductor, including upper expanding parts, under expanding parts and connect upper expanding parts and under the Elastic buckle of expanding parts, upper expanding parts with under expanding modular construction identical, the laterally zygomorphic overhead bare conductor that is connected to needs the surface of protective position, upper expanding parts and under the outer surface of expanding parts be coated with modified epoxy insulating barrier.Expansion is hollow structure through conductor；Present configuration shields overhead bare conductor surface single line curvature and burr, it is thus achieved that conductor equivalent redius smooth, bigger, thoroughly eliminates bare conductor surface corona, greatly reduces safe distance；It is almost permanent security protection effect that the expanding conductor of the present invention and outside enhancing solid insulating layer strategy can obtain.
Description
Technical field
The present invention relates to overhead bare conductor supplement insulation technology field, be specifically related to a kind of expanding reinforced insulation structure of overhead bare conductor.
Background technology
In recent years, along with the vile 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, external force destruction, bird pest, pollution flashover, foreign body overlap joint (kite, aluminum. paper tinsel plastics etc.) etc. the fault of the Power System Shortcuts that causes and electric discharge again and again occur, high-tension line will carry out the interruption maintenance of 2-3 time every year, need to process each time with substantial amounts of circuit foreign body, the safe and stable operation of system is not only brought very big impact by this, more causes great economic loss.
Solution to this problem at present, mainly concentrate the method that high pressure bare conductor carries out local supplement insulation to improve the safe and stable operation of system: (1) FJRD can augment insulant as local, be used locally for the conductive surface cladding that dielectric level is poor.But the method construction complexity, pyrocondensation belt is manually wound around, and quantities is big and uneven.(2) also have machine silicon flame-retarded heat-conducting High-Voltage Insulation coating is coated uniformly on bare conductor surface to improve the insulating capacity of bare conductor.(3) there is researcher introduction, at composite insulator high-pressure side, insulating sheath is installed and improve high-pressure side electric field, it is therefore an objective to improve discharge inception voltage and the pollution flashover voltage of composite insulator.Analyze display, these three kinds of method short-terms are likely to there is certain effect, reduce to a certain extent when have grounding body near time probability of malfunction, but all cannot effectively eliminate the little electric field with wire burr place of single conductor radius of curvature to concentrate, only simply conductive surface local highfield can be extended to additional insulating surface, namely may result in minor insulation come off through the corrosion of short time localized corona and outdoor environment.It addition, this kind of reinforced insulation measure is owing to being that existing working line is carried out, the insulation lapping gap of (1st) and (3rd) kind method is inevitable；(2nd) plants measure insulating surface corona unavoidably, and all existence insulation both sides and bare conductor interface conductive line surfaces corona corrosion rapidly to end organic insulation, and therefore insulation life is all very short.
Analyze further, take three kinds of measures can receive reliably, long-life reinforced insulation effect, be respectively as follows: (1) and shield bare conductor surface single line curvature and burr；(2) obtain conductor equivalent redius smooth, bigger, could thoroughly eliminate bare conductor surface corona；(3) outside enhancing solid insulating layer.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, therefore China needs badly and develops the novel expanding reinforced insulation structure with independent intellectual property right.
Summary of the invention
In order to solve above-mentioned prior art Problems existing, it is an object of the invention to provide a kind of expanding reinforced insulation structure of overhead bare conductor, there is shielding corona, reduce critical corona distance, improve dielectric strength, the feature of long service life.
In order to realize foregoing invention purpose, the present invention adopts the technical scheme that:
A kind of expanding reinforced insulation structure of overhead bare conductor, including upper expanding parts 1, under expanding parts 2 and connect upper expanding parts 1 and under the Elastic buckle 3 of expanding parts 2；Described expanding parts 1 with under expanding parts 2 structure identical, the laterally zygomorphic overhead bare conductor that is connected to needs the surface of protective position；Described expanding parts 1 and under the outer surface of expanding parts 2 be coated with modified epoxy insulating barrier 4, upper expanding parts 1 and under expanding parts 2 be hollow structure, if respectively offering two screwed holes 7 on the hemispherical dome structure at upper expanding parts 1 two ends, then under expanding parts 2 two ends hemispherical dome structure on respectively offer two small through hole 8 and the large through-hole 9 being opened under small through hole 8, or under expanding parts 2 two ends hemispherical dome structure on respectively offer two screwed holes 7, the hemispherical dome structure at upper expanding parts 1 two ends respectively offers two small through hole 8 and the large through-hole 9 being opened 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, formed regulate upper expanding parts 1 and under the adjustment mouth 12 of clearance distance between expanding parts 2, the conical sections rigidity weakening Elastic buckle 3 is had to facilitate the groove of cone traverse small through hole 8 at the cylindrical other end of thread segment 10 and the middle part of cone, when described Elastic buckle 3 connect upper expanding parts 1 and under after expanding parts 2, the junction of the large through-hole 9 that described platform 11 is stuck under small through hole 8.
Described expanding parts 1 and under the main body of expanding parts 2 be semi-cylindrical, two ends are hemispherical dome structure.
Described expanding parts 1 and under the main body of expanding parts 2 be semi-cylindrical, one end is hemispherical dome structure.
Described expanding parts 1 and under expanding parts 2 be semi-cylindrical.
Described expanding parts 1 and under expanding parts 2 be hemisphere shape.
Described expanding parts 1 and under the material of expanding parts 2 be aluminium alloy.
The material of described Elastic buckle 3 is copper.
Described expanding parts 1 and under the wall thickness at expanding parts 2 hollow structure inside place less than 5mm.
The thickness of described modified epoxy insulating barrier 4 is 0.5～1mm.
Compared to the prior art the present invention, has the advantage that
1, the invention solves three below problem: (1) shields overhead bare conductor surface single line curvature and burr；(2) obtain conductor equivalent redius smooth, bigger, thoroughly eliminate bare conductor surface corona；(3) outside enhancing solid insulating layer, it is almost permanent effect that reinforced insulation strategy can obtain.
2, present invention decreases the critical corona distance of overhead bare conductor, when there being grounding body near bare conductor, reduce the danger that corona discharge occurs.
3, in the present invention expanding parts and under expanding parts can install when bare conductor is not dismantled, structure is attached to Len req, easy construction, it is possible to change.
4, due to the fact that be aluminum alloy body structure can life-time service under rugged environment, will not breakaway, do not come off, will not corrode, dielectric level will not reduce.
Accompanying drawing explanation
Fig. 1 is that the expanding parts of the embodiment of the present invention one use state diagram front view.
Fig. 2 is the expanding parts top view of the embodiment of the present invention one.
Fig. 3 is that the expanding parts of a kind of structure that the embodiment of the present invention two uses use state diagram front view.
Fig. 4 is that the expanding parts of another kind of structure that the embodiment of the present invention two uses use state diagram front view.
Fig. 5 is that the expanding parts of the embodiment of the present invention three use state diagram front view.
Fig. 6 is the front view of Elastic buckle.
Fig. 7 for expanding reinforced insulation structure is not installed time, the radius of high pressure bare conductor be and and grounding body between critical corona distance schematic diagram.
Fig. 8 for install expanding reinforced insulation structure time, the effective radius of high pressure bare conductor be and and grounding body between critical corona distance schematic diagram.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Embodiment one
Such as Fig. 1, shown in Fig. 2 and Fig. 6, the expanding reinforced insulation structure of the present embodiment one overhead bare conductor, including upper expanding parts 1, under expanding parts 2 and connect upper expanding parts 1 and under the Elastic buckle 3 of expanding parts 2, described expanding parts 1 with under expanding parts 2 structure identical, the laterally zygomorphic overhead bare conductor that is connected to needs the upper and lower surface at reinforced insulation place, high pressure bare conductor 5 surface can be arranged on to increase its effective radius when high pressure bare conductor 5 is not dismantled, reach the effect of shielding corona, as required reinforced insulation structure of the present invention is attached to Len req, easy construction, and can change.Described expanding parts 1 and under the outer surface of expanding parts 2 be coated with modified epoxy insulating barrier 4, main body is cylindric, hollow structure 6 it is inside it, to reduce overall structure weight, two ends are hemispherical dome structure, if respectively offering two screwed holes 7 on the hemispherical dome structure at upper expanding parts 1 two ends, then under expanding parts 2 two ends hemispherical dome structure on respectively offer two small through hole 8 and the large through-hole 9 being opened under small through hole 8, or under expanding parts 2 two ends hemispherical dome structure on respectively offer two screwed holes 7, the hemispherical dome structure at upper expanding parts 1 two ends respectively offers two small through hole 8 and the large through-hole 9 being opened under small through hole 8, can also be arranged in a crossed manner with small through hole 8 and large through-hole 9 by screwed hole 7；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, formed available screwdriver regulate upper expanding parts 1 and under the adjustment mouth 12 of clearance distance between expanding parts 2, the conical sections rigidity weakening Elastic buckle 3 is had to facilitate the groove of cone traverse small through hole 8 at the cylindrical other end of thread segment 10 and the middle part of cone, when described Elastic buckle 3 connect upper expanding parts 1 and under after expanding parts 2, the junction of the large through-hole 9 that described platform 11 is stuck under small through hole 8.
Embodiment two
As shown in Figure 3 and Figure 4, the expanding reinforced insulation structure of the present embodiment one overhead bare conductor, other structure is with embodiment one, be different in that: upper expanding parts 1 and under the main body of expanding parts 2 be semi-cylindrical, one end is hemispherical dome structure, or upper expanding parts 1 and under expanding parts 2 be semi-cylindrical.When this kind of structure uses, upper expanding parts as shown in Figure 41 and under expanding parts 2 can concatenate multiple as required, but the two ends after concatenation must concatenate structure as shown in Figure 3 upper expanding parts 1 and under expanding parts 2, and hemispherical dome structure one end to be placed in outermost end.
Embodiment three
As it is shown in figure 5, the expanding reinforced insulation structure of the present embodiment one overhead bare conductor, other structure, with embodiment one, is different in that: described expanding parts 1 and under expanding parts 2 be hemisphere shape.During use, can concatenate multiple as required.
As the preferred embodiment of the present invention, described expanding parts 1 and under the material of expanding parts 2 be 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, described expanding parts 1 and under the wall thickness at expanding parts 2 hollow structure inside place less than 5mm.
As the preferred embodiment of the present invention, the thickness of described modified epoxy insulating barrier 4 is 0.5～1mm.
The operation principle of the present invention is: high pressure bare conductor 5 through upper expanding parts 1 and under the expanding reinforced insulation structure of expanding parts 2 composition, high pressure bare conductor 5 and expanding reinforced insulation structure have electrical contact, both are isoelectric level, thus adding the effective radius of high pressure bare conductor 5, improve the critical corona distance of high pressure bare conductor 5.
As it is shown in fig. 7, when being fitted without expanding reinforced insulation structure, the radius of high pressure bare conductor is r0, the critical corona distance between high pressure bare conductor and grounding body is R1, maximum field EmaxThe position occurred is bare conductor outer surface, it is possible to represented by equation below.
In formula: U-high pressure bare conductor rating operating voltage, r0-high pressure bare conductor radius, R1-critical corona distance
As shown in Figure 8, after installing expanding reinforced insulation structure, the effective radius of high pressure bare conductor 5 is expanding for R0, the critical corona distance between high pressure bare conductor 5 and grounding body is R2, maximum field EmaxThe position occurred is modified epoxy insulating barrier 4 outer surface, and equation below represents.
In formula: U-high pressure bare conductor rating operating voltage, R0The outer radius of-aluminium alloy structure, the thickness of Δ R-epoxy insulation layer, εairThe relative dielectric constant of-air, ε1The relative dielectric constant of-epoxy insulation layer, R2-critical corona distance
It can be seen that by after expanding, the critical corona distance of high pressure bare conductor is by R1It is reduced to R2。
The installation process of the present invention is: when installing expanding enhancing structure, need to be coordinated by the screwed hole 7 of Elastic buckle 3 with upper expanding parts 1 and/or expanding parts 2 in advance, upper expanding parts 1 and/or expanding parts 2 two Elastic buckles 3 of each installation above, then when not dismantling high pressure bare conductor 5, the upper expanding parts 1 of mounted Elastic buckle 3 and upper expanding parts 2 are placed on high pressure bare conductor, by gap upward, then Elastic buckle 3 is tipped in small through hole 8, namely the installation of single expanding enhancing structure is completed, then successively according to aforesaid operations by multiple single expanding enhancing structural groupings together, to Len req.
Claims (4)
1. the expanding reinforced insulation structure of overhead bare conductor, it is characterised in that: include expanding parts (1), under expanding parts (2) and connect upper expanding parts (1) and under the Elastic buckle (3) of expanding parts (2)；Described expanding parts (1) with under expanding parts (2) structure identical, the laterally zygomorphic overhead bare conductor that is connected to needs the surface of protective position；Described expanding parts (1) and under the outer surface of expanding parts (2) be coated with modified epoxy insulating barrier (4), upper expanding parts (1) and under expanding parts (2) be hollow structure, if respectively offering two screwed holes (7) on the hemispherical dome structure at upper expanding parts (1) two ends, then under expanding parts (2) two ends hemispherical dome structure on respectively offer two small through hole (8) and the large through-hole (9) being opened under small through hole (8), or under expanding parts (2) two ends hemispherical dome structure on respectively offer two screwed holes (7), the hemispherical dome structure at upper expanding parts (1) two ends is respectively offered two small through hole (8) and the large through-hole (9) being opened under small through hole (8)；The integrated structure that described Elastic buckle (3) is 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), formed regulate upper expanding parts (1) and under the adjustment mouth (12) of clearance distance between expanding parts (2), the conical sections rigidity weakening Elastic buckle (3) is had to facilitate the groove of cone traverse small through hole (8) at the other end of cylindrical thread segment (10) and the middle part of cone, when in described Elastic buckle (3) connection expanding parts (1) and under after expanding parts (2), the junction of the large through-hole (9) that described platform (11) is stuck under small through hole (8)；Described expanding parts (1) and under the main body of expanding parts (2) be semi-cylindrical, two ends are hemispherical dome structure；Described expanding parts (1) and under the material of expanding parts (2) be aluminium alloy.
2. a kind of expanding reinforced insulation structure of overhead bare conductor according to claim 1, it is characterised in that: the material of described Elastic buckle (3) is copper.
3. a kind of expanding reinforced insulation structure of overhead bare conductor according to claim 1, it is characterised in that: described expanding parts (1) and under the wall thickness at expanding parts (2) hollow structure inside place less than 5mm.
4. a kind of expanding reinforced insulation structure of overhead bare conductor according to claim 1, it is characterised 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 |
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| Publication Number | Publication Date |
|---|---|
| CN103971798A CN103971798A (en) | 2014-08-06 |
| CN103971798B true CN103971798B (en) | 2016-07-13 |
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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