CN104901255A - High-voltage overhead line crossing method and safe distance separating device - Google Patents
High-voltage overhead line crossing method and safe distance separating device Download PDFInfo
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- CN104901255A CN104901255A CN201510333432.9A CN201510333432A CN104901255A CN 104901255 A CN104901255 A CN 104901255A CN 201510333432 A CN201510333432 A CN 201510333432A CN 104901255 A CN104901255 A CN 104901255A
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- overhead line
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- tension overhead
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
- H02G7/06—Suspensions for lines or cables along a separate supporting wire, e.g. S-hook
- H02G7/08—Members clamped to the supporting wire or to the line or cable
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/12—Devices for maintaining distance between parallel conductors, e.g. spacer
- H02G7/125—Damping spacers
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- Suspension Of Electric Lines Or Cables (AREA)
Abstract
Provided is a high-voltage overhead line crossing method. When two high-voltage overhead lines with different voltage classes cross each other, a safe distance separating device is disposed on the intersections of the two high-voltage overhead lines. Also provided is a safe distance separating device for high-voltage overhead line crossing. The safe distance separating device comprises a wire clamp, a connecting tool, and a composite insulator which form a suspended string group. The top and the bottom of the suspended string group are fixed to the intersections of the two high-voltage overhead lines. The method changes a conventional crossing way and achieves crossing of a line with a low voltage class by reducing an air gap between an overhead line with a high voltage class and a crossing line. The method changes the conventional crossing way and performs clamping between the crossed overhead lines by using an insulation spacer. The safe distance separating device is simple in structure, good in practicality, easy to produce, and convenient in construction, and greatly saves investment.
Description
Technical field
The present invention relates to high-tension overhead line technical field, particularly a kind of high-tension overhead line intersection that realizes bores method more and safe distance escapement.
Background technology
Along with the development of electrical network, substation location gets more and more, and line corridor is more and more intensive, occurs that intersection bores probability more increasing between overhead transmission line.The design of original high-tension overhead line only considered in max calculation sag situation, meeting wire to the distance on ground has certain nargin, can work as have the newly-built circuit needs lower than this high-tension overhead line electric pressure bore more this overhead transmission line time, due to insufficient height, just need to be increased by voltage levels overhead line structures or adopt cable drill more.So, difficulty of construction is large, invest high, when especially adopting cable, later stage O&M costly, cut cable is the weak link in whole piece transmission line, overload capacity is more weak, and the fault of the cable fault irrecoverability such as cable end damage often, needs professional contingent and corresponding spare unit, spare part again to change, install, repairing difficulty, interruption duration is longer.For the area that operation maintenance distance is longer, spare unit, spare part transport comparatively inconvenience, specialized maintenance troop repairing difficulty is larger, larger to the influence on system operation of electrical network self.
Summary of the invention
For overcoming problems of the prior art, the invention provides a kind of high-tension overhead line intersection that realizes and boring new method more.The method can investment reduction cost, on the one hand avoid increasing transformation to voltage levels overhead line structures, when avoiding on the other hand strong wind occurs, wire is waved, and causes upper conductor to discharge to lower wire and trips.
The present invention solves the technical scheme that its technical problem takes: this kind of high-tension overhead line intersects and bore method more, it is characterized in that: described high-tension overhead line comprises first order high-tension overhead line and second level high-tension overhead line, wherein the voltage of the voltage ratio second level high-tension overhead line of first order high-tension overhead line is low; First order high-tension overhead line intersects with second level high-tension overhead line after certain angle and bores more second level high-tension overhead line below the high-tension overhead line of the second level; Described first order high-tension overhead line and second level high-tension overhead line have seen some crosspoints directly over the high-tension overhead line of the second level, and each crosspoint has crosspoint corresponding with it respectively on first order high-tension overhead line and second level high-tension overhead line; Safe distance escapement is provided with between each crosspoint that first order high-tension overhead line is corresponding with on the high-tension overhead line of the second level; One end of described safe distance escapement is fixed on a crosspoint of first order high-tension overhead line, and the other end of safe distance escapement is fixedly on the crosspoint that the first high-tension overhead line crosspoint is corresponding.
Further, described first order high-tension overhead line is single loop overhead transmission line, and voltage is 35kV, and second level high-tension overhead line is Double-loop overhead road, and voltage is 110kV.
Further, there are six crosspoints on single loop overhead transmission line and the high-tension overhead line Double-loop overhead road, the second level of described first order high-tension overhead line in space, six crosspoints are corresponding crosspoint D on first order high-tension overhead line and second level high-tension overhead line and crosspoint D ' respectively, crosspoint E and crosspoint E ', crosspoint F and crosspoint F ', crosspoint M and crosspoint M ', crosspoint H and crosspoint H ', crosspoint N and crosspoint N '.
Further, first order high-tension overhead line bores more section and does not retain overhead ground wire.
High-tension overhead line intersection bores a safe distance escapement more, it is characterized in that: comprise wire clamp, connect gold utensil and composite insulator; Described wire clamp has two, is respectively the first wire clamp and the second wire clamp, and described connection gold utensil has two, and be respectively the first connection gold utensil and be connected gold utensil with second, described insulator is compound inslation conductor spacer; It is hinged that first wire clamp and first is connected gold utensil, and first one end connecting gold utensil and insulation gap rod is articulated and connected, and the other end and second of insulation gap rod is connected gold utensil and is articulated and connected, and the second connection gold utensil and the second wire clamp are articulated and connected.
Further, the first described wire clamp and the second wire clamp are suspension clamp, and the first wire clamp, first connects gold utensil, composite insulator, second connects gold utensil and the second wire clamp connects to form suspension string group successively.
Further, the first described wire clamp is connected gold utensil with first, the second wire clamp and second is connected gold utensil and passes through pinned connection.
Further, the clamping clamp of First Line of one of them described safe distance escapement is held in the D place, crosspoint of first order high-tension overhead line, and the second wire clamp fixed clamp is at the D ' place, crosspoint of second level high-tension overhead line; First wire clamp of other five safe distance escapements is separately fixed at crosspoint E, crosspoint F, crosspoint M, crosspoint H and N place, crosspoint, and the second wire clamp fixes crosspoint E ', crosspoint F ', crosspoint M ', crosspoint H ' and N ' place, crosspoint respectively.
To sum up, the beneficial effect of technique scheme of the present invention is as follows: get over by reducing voltage levels overhead transmission line and second level high-tension overhead line and boring the brill that air gap between more circuit and first order high-tension overhead line (during the intersection of the different circuit of a demand fulfillment different interruption maintenance without the minimum safe clear distance blocked between live part) realizes low-voltage-grade overhead transmission line.Compared with the brill Vietnamese side formula increasing shaft tower height with tradition, what need meet drilled more overhead transmission line shaft tower exhales title high (shaft tower minimum point wire hanging wire point) height reduction a lot, does not need to increase transformation to shaft tower and just can realize boring more.
By the first wire clamp of safe distance escapement, connect gold utensil and insulator makes the high voltage overhead lines of top-bottom cross link together in crosspoint, achieve low-voltage-grade high-tension overhead line when not high voltage grade overhead transmission line shaft tower and successful brills of voltage levels overhead transmission line is got over and clamp.Ensure that upper and lower twice high-tension overhead lines all the time under a fixing safe distance, ensure that low-voltage-grade overhead transmission line distance to the ground meets regulatory requirements simultaneously.The method breaches traditional intersection and bores Vietnamese side's formula, and structure is simple, practical, has greatly saved investment, easy construction, has obtained good onsite application effect.
Accompanying drawing explanation
Fig. 1 is that high voltage overhead lines of the present invention intersection bores more schematic diagram;
Fig. 2 is the safe distance escapement that the present invention adopts.
In figure:
1 first order high-tension overhead line, 2 second level high-tension overhead lines, 31 first wire clamps, 32 first connect gold utensil, and 33 insulation gap rods, 34 second connect gold utensil, 35 second wire clamps.
Embodiment
Be described in detail to characteristic sum principle of the present invention below in conjunction with Fig. 1 and Fig. 2, illustrated embodiment, only for explaining the present invention, not limits protection scope of the present invention with this.
As shown in Figure 1, between two adjacent high pressure stem towers, erection has high-tension overhead line, and the height of general shaft tower is all higher with the safe altitude requirement meeting high-tension overhead line.High voltage overhead lines between the adjacent shaft tower of high voltage overhead lines of identical voltage has certain sag under the effect of circuit self gravitation.The high voltage overhead lines of different voltage intersects to bore mutually to be got over, and when looking down from the top of high voltage overhead lines, forms some crosspoints between the high voltage overhead lines of different voltage.
The high voltage overhead lines bored above in high voltage overhead lines more in intersection is first order high-tension overhead line 1, and wherein first order high-tension overhead line is single loop overhead wire; High voltage overhead lines in below is second level high-tension overhead line 2, and wherein second level high-tension overhead line is Double-loop overhead.And the electric pressure of first order high-tension overhead line 1 is low-voltage-grade high-tension overhead line, the electric pressure of second level high-tension overhead line 2 is voltage levels high-tension overhead line, namely the voltage of first order high-tension overhead line 1 is lower than the voltage of second level high-tension overhead line 2, below describe in first order high-tension overhead line 1 voltage for 35kV, second level high-tension overhead line 2 for 110kV voltage be that example explains.
Be provided with safe distance escapement at the cross-point locations of high-tension overhead line, the top of described safe distance escapement is fixedly connected on first order high-tension overhead line 1, and bottom is fixedly connected on second level high-tension overhead line 2.
As shown in Figure 1, there are six crosspoints on single loop overhead transmission line and the high-tension overhead line Double-loop overhead road, the second level of first order high-tension overhead line in space, six crosspoints are corresponding respectively has crosspoint corresponding with it at first order high-tension overhead line with on the high-tension overhead line of the second level.Define six crosspoints corresponding crosspoint D on first order high-tension overhead line and second level high-tension overhead line and crosspoint D ' respectively, crosspoint E and crosspoint E ', crosspoint F and crosspoint F ', crosspoint M and crosspoint M ', crosspoint H and crosspoint H ', crosspoint N and crosspoint N '.
Further, first order high-tension overhead line bores more section (near the segment section circuit with second level high voltage overhead lines intersection point in first order high voltage overhead lines) overhead ground wire and does not retain, namely when first order high-tension overhead line brill more second level high-tension overhead line, can by calculating, utilize the ground wire of second level high-tension overhead line to realize anti-lightning strike effect, and then create a further reduction the restriction of boring more highly.
As shown in Figure 2, this safe distance escapement comprises wire clamp 31, connects gold utensil and insulator 33.Described wire clamp has two, and the structure of two wire clamps is identical, is respectively the first wire clamp 31 and the second wire clamp 34.Described connection gold utensil also has two, and two structures connecting gold utensil are also identical, are respectively the first connection gold utensil 32 and are connected gold utensil 35 with second.Described composite insulator is insulation gap rod, and described insulation gap rod is connected to form one with gold utensil and goes here and there.The first described wire clamp 31 is connected the hinged flexible connection of gold utensil 32 with first.First connects gold utensil 32 is flexibly connected with one end of insulation gap rod is hinged.The other end of insulation gap rod is connected the hinged flexible connection of gold utensil 34 with second.Second connects gold utensil 34 and the hinged active link of the second wire clamp 35.
Further, the first described wire clamp 31 is connected gold utensil 32, second wire clamp 35 and is connected gold utensil 34 with second and can passes through pinned connection with first.First wire clamp 31 and the first connection gold utensil 32, second wire clamp 35 are connected with second between gold utensil 34 and can movable rotate, and add the flexibility of this safe distance escapement.The first described wire clamp 31 is clamped on first order high-tension overhead line 1, and the second wire clamp 35 is clamped on second level high-tension overhead line 2.According to the requirement of minimum safe clear distance between first order high-tension overhead line 1 and second level high-tension overhead line 2, the length of insulation gap rod suitably can be regulated.
Further, the first wire clamp 31 and the second wire clamp 35 can be selected to be suspension clamp, and the first wire clamp 31, first connects gold utensil 32, insulation gap rod, second connects gold utensil 34 and the second wire clamp 35 connects to form suspension string group successively.
Further, single loop overhead transmission line and second level high-tension overhead line 2 double circuit line of described first order high-tension overhead line 1 have six crosspoints in space, six crosspoints are corresponding crosspoint D on first order high-tension overhead line 1 with second level high-tension overhead line 2 and crosspoint D ' respectively, crosspoint E and crosspoint E ', crosspoint F and crosspoint F ', crosspoint M and crosspoint M ', crosspoint H and crosspoint H ', crosspoint N and crosspoint N '; First wire clamp in one of them safe distance escapement is gripped D place, crosspoint, this safe distance escapement described naturally droops placement, second wire clamp is clamped to D ' place, crosspoint, first wire clamp of other five safe distance escapements is separately fixed at crosspoint E, crosspoint F, crosspoint M, crosspoint H and N place, crosspoint, and the second wire clamp fixes crosspoint E ', crosspoint F ', crosspoint M ', crosspoint H ' and N ' place, crosspoint respectively.
Need during concrete operations to use Special ladder, be first clamped on first order high-tension overhead line 1 by the first wire clamp 31, first connects gold utensil 32, insulation gap rod, second connects gold utensil 34 and the second wire clamp 35 naturally droops under gravity.Then with suspension hook or other hoisting tools, second level high-tension overhead line 2 is improved, to the position that the second wire clamp 35 naturally droops, the second wire clamp 35 is being clamped on second level high-tension overhead line 2.Then other safe distance escapements are installed successively.
Also the first wire clamp 31 of all safe distance escapements can be clamped on first order high-tension overhead line 1 line, and then the second wire clamp 35 is clamped on second level high-tension overhead line 2 in a manner described.
This safe distance escapement and installation method thereof are equally applicable to the high-tension overhead line of other electric pressures and other intersect the circuit boring more line loop number.According to the requirement of minimum safe clear distance between different voltage high-tension overhead line, the length of insulation gap rod can be regulated.
By the first wire clamp of safe distance escapement, connect gold utensil and insulation gap rod makes the high voltage overhead lines of top-bottom cross link together, under the condition of not increasing high voltage overhead lines shaft tower, achieve overhead transmission line successfully bore more.The method breaches traditional intersection and bores Vietnamese side's formula, proposes first to bore in intersection more to adopt insulation gap rod to carry out the method for clamp between circuit.Structure is simple, practical, has greatly saved investment, is easy to realize, easy construction.
Above-described embodiment is only the description carried out the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; relevant technical staff in the field, to various distortion of the present invention and improvement, all should expand in the determined protection range of claims of the present invention.
Claims (8)
1. a high-tension overhead line intersection bores method more, it is characterized in that: described high-tension overhead line comprises first order high-tension overhead line and second level high-tension overhead line, wherein the voltage of the voltage ratio second level high-tension overhead line of first order high-tension overhead line is low; First order high-tension overhead line intersects with second level high-tension overhead line after certain angle and bores more second level high-tension overhead line below the high-tension overhead line of the second level; Described first order high-tension overhead line and second level high-tension overhead line have seen some crosspoints directly over the high-tension overhead line of the second level, and each crosspoint has crosspoint corresponding with it respectively on first order high-tension overhead line and second level high-tension overhead line; Safe distance escapement is provided with between each crosspoint that first order high-tension overhead line is corresponding with on the high-tension overhead line of the second level; One end of described safe distance escapement is fixed on a crosspoint of first order high-tension overhead line, and the other end of safe distance escapement is fixedly on the crosspoint that the first high-tension overhead line crosspoint is corresponding.
2. a kind of high-tension overhead line intersection according to claim 1 bores method more, it is characterized in that: described first order high-tension overhead line is single loop overhead transmission line, voltage is 35kV, and second level high-tension overhead line is Double-loop overhead road, and voltage is 110kV.
3. a kind of high-tension overhead line intersection according to claim 2 bores method more, it is characterized in that: there are six crosspoints on single loop overhead transmission line and the high-tension overhead line Double-loop overhead road, the second level of described first order high-tension overhead line in space, six crosspoints are corresponding crosspoint D on first order high-tension overhead line and second level high-tension overhead line and crosspoint D ' respectively, crosspoint E and crosspoint E ', crosspoint F and crosspoint F ', crosspoint M and crosspoint M ', crosspoint H and crosspoint H ', crosspoint N and crosspoint N '.
4. a kind of high-tension overhead line intersection according to claim 1 bores method more, it is characterized in that: first order high-tension overhead line bores more section and do not retain overhead ground wire.
5. high-tension overhead line intersection bores a safe distance escapement more, it is characterized in that: comprise wire clamp, connect gold utensil and composite insulator; Described wire clamp has two, is respectively the first wire clamp and the second wire clamp, and described connection gold utensil has two, and be respectively the first connection gold utensil and be connected gold utensil with second, described insulator is compound inslation conductor spacer; It is hinged that first wire clamp and first is connected gold utensil, and first one end connecting gold utensil and insulation gap rod is articulated and connected, and the other end and second of insulation gap rod is connected gold utensil and is articulated and connected, and the second connection gold utensil and the second wire clamp are articulated and connected.
6. a kind of high-tension overhead line intersection according to claim 5 bores safe distance escapement more, it is characterized in that: the first described wire clamp and the second wire clamp are suspension clamp, the first wire clamp, first connects gold utensil, composite insulator, second connects gold utensil and the second wire clamp connects to form suspension string group successively.
7. a kind of high-tension overhead line intersection according to claim 5 bores safe distance escapement more, it is characterized in that: the first described wire clamp is connected gold utensil with first, the second wire clamp and second is connected gold utensil and passes through pinned connection.
8. a kind of high-tension overhead line intersection according to claim 5 bores safe distance escapement more, it is characterized in that: the clamping clamp of First Line of one of them described safe distance escapement is held in the D place, crosspoint of first order high-tension overhead line, and the second wire clamp fixed clamp is at the D ' place, crosspoint of second level high-tension overhead line; First wire clamp of other five safe distance devices is separately fixed at crosspoint E, crosspoint F, crosspoint M, crosspoint H and N place, crosspoint, and the second wire clamp fixes crosspoint E ', crosspoint F ', crosspoint M ', crosspoint H ' and N ' place, crosspoint respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510333432.9A CN104901255A (en) | 2015-06-16 | 2015-06-16 | High-voltage overhead line crossing method and safe distance separating device |
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| CN201510333432.9A CN104901255A (en) | 2015-06-16 | 2015-06-16 | High-voltage overhead line crossing method and safe distance separating device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106129944A (en) * | 2016-06-24 | 2016-11-16 | 国网河南省电力公司电力科学研究院 | A kind of extra-high voltage horizontally disposed transmission line of electricity anti-dance approach |
| CN107681602A (en) * | 2017-11-02 | 2018-02-09 | 珠海安瑞通电子科技有限公司 | High-tension line monitoring device and its across connected connection device |
| CN108614274A (en) * | 2018-05-22 | 2018-10-02 | 广州市极臻智能科技有限公司 | Staggered form crossover track distance measurement method based on multi-rotor unmanned aerial vehicle and device |
| CN111682479A (en) * | 2020-07-02 | 2020-09-18 | 国核电力规划设计研究院有限公司 | Single-loop power transmission line iron tower and power transmission line tower system |
| CN111682483A (en) * | 2020-07-02 | 2020-09-18 | 国核电力规划设计研究院有限公司 | Transmission line drilling tower and transmission line tower system |
| CN112531558A (en) * | 2020-12-01 | 2021-03-19 | 广东电网有限责任公司湛江供电局 | Circuit is taken and is hung portable and install and remove isolation instrument |
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| CN204732831U (en) * | 2015-06-16 | 2015-10-28 | 国网山东省电力公司经济技术研究院 | A kind of high-tension overhead line intersection bores safe distance escapement more |
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| CN201307742Y (en) * | 2008-11-14 | 2009-09-09 | 辽河石油勘探局 | Horizontally through-type iron tower of 66KV overhead lines |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106129944A (en) * | 2016-06-24 | 2016-11-16 | 国网河南省电力公司电力科学研究院 | A kind of extra-high voltage horizontally disposed transmission line of electricity anti-dance approach |
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| CN108614274A (en) * | 2018-05-22 | 2018-10-02 | 广州市极臻智能科技有限公司 | Staggered form crossover track distance measurement method based on multi-rotor unmanned aerial vehicle and device |
| CN111682479A (en) * | 2020-07-02 | 2020-09-18 | 国核电力规划设计研究院有限公司 | Single-loop power transmission line iron tower and power transmission line tower system |
| CN111682483A (en) * | 2020-07-02 | 2020-09-18 | 国核电力规划设计研究院有限公司 | Transmission line drilling tower and transmission line tower system |
| CN111682483B (en) * | 2020-07-02 | 2022-01-18 | 国核电力规划设计研究院有限公司 | Transmission line drilling tower and transmission line tower system |
| CN111682479B (en) * | 2020-07-02 | 2022-01-18 | 国核电力规划设计研究院有限公司 | Single-loop power transmission line iron tower and power transmission line tower system |
| CN112531558A (en) * | 2020-12-01 | 2021-03-19 | 广东电网有限责任公司湛江供电局 | Circuit is taken and is hung portable and install and remove isolation instrument |
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