CN203352118U - Lightning protection device of overhead transmission line - Google Patents
Lightning protection device of overhead transmission line Download PDFInfo
- Publication number
- CN203352118U CN203352118U CN 201320397562 CN201320397562U CN203352118U CN 203352118 U CN203352118 U CN 203352118U CN 201320397562 CN201320397562 CN 201320397562 CN 201320397562 U CN201320397562 U CN 201320397562U CN 203352118 U CN203352118 U CN 203352118U
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- Prior art keywords
- arm
- cross
- discharging gap
- shaft tower
- lightning protection
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 210000003414 extremity Anatomy 0.000 description 1
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Images
Abstract
The utility model discloses a lightning protection device of an overhead transmission line. The device comprises a lightning protection device disposed on a tower. The lightning protection device comprises a discharging gap upper cross arm disposed between a tower upper cross arm and a tower lower cross arm. The discharging gap upper cross arm is fixed on the tower, and is below a suspension point of an upper wire. Length of the discharging gap upper cross arm on an extension direction is larger than length of the tower upper cross arm on an extension direction. A discharging gap lower cross arm is disposed below the tower lower cross arm, and the discharging gap lower cross arm is fixed on the tower and is below two suspension points of lower wires. Length of the discharging gap lower cross arm on an extension direction is larger than length of the tower lower cross arm on an extension direction. The lightning protection device is economical and practical, service life is long, and troubles of damaging plants and civil in large areas caused by setting up lightning conductors are prevented.
Description
Technical field
The utility model relates to the electric power transmission line equipment technical field, relates in particular to a kind of lightning protection device of overhead transmission line.
Background technology
Transmission line is divided into cable line and overhead transmission line by version, and on the shaft tower on overhead transmission line route transmission line, shaft tower, the formations such as cross-arm, wire, insulator under cross-arm, shaft tower, be erected on ground.Overhead transmission line is the important component part of power network and electric power system, because it is exposed among nature, therefore very easily be subject to external influence and infringement, wherein most importantly thunderbolt.
Overhead transmission line is erected at the ground such as wilderness, hills and high mountain more, and transmission line is long in addition, and thunderstorm season is easy to be struck by lightning.Circuit suffers thunderbolt that three kinds of situations are arranged: the one, be struck by lightning on line conductor, and produce the direct lightning strike overvoltage; The 2nd, after the thunderbolt lightning conducter, counterattack is to power transmission line; The 3rd, be struck by lightning near circuit or on shaft tower, produce induction overvoltage on power transmission line.No matter be direct lightning strike overvoltage or induction overvoltage, all make on wire and produce a large amount of electric charges, these electric charges are propagated with the speed guiding line both sides that are similar to light, and Here it is, and thunder and lightning carries out ripple.The direct lightning strike overvoltage, gently cause that line insulator dodges to iron, thereby cause circuit single-phase earthing or tripping operation, heavy cause the accidents such as insulator breaks, punctures, broken string, causes the power failure of circuit long period.Thunder and lightning carries out ripple fair line road and invades transformer station, threatens the insulation of electric equipment, causes the accidents such as Explosion of on Arrester, main transformer insulation damages, has directly affected the safe operation of transformer station.
Overhead transmission line takes lightning protection measures to be very important so, and traditional lightning protection mode has several, comprising setting up lightning conducter and strengthening line insulation.The Main Function that sets up lightning conducter is to prevent that thunder from attacking wire directly, also has following effect simultaneously: 1, shunting action, with the minimizing lightning current of shaft tower of flowing through, thereby reduce the tower top current potential; 2, can reduce the voltage of line insulator by the coupling to wire; 3, can also reduce the induction overvoltage on wire to the shielding action of wire.But adopt while setting up the lightning conducter measure, when transmission line is located in farmland, will inevitably damage crops, cause civil disputation and economic loss.Therefore adopt the measure of setting up lightning conducter to come lightning protection to exist inconvenient drawback is installed.Wherein strengthen the circuit insulation measures when taking to install the insulator measure, wherein insulator useful life of installing is short, investment is large, and the workload of changing is large, therefore also has certain drawback.
The utility model content
The purpose of this utility model is to provide a kind of lightning protection device of overhead transmission line, is intended to solve lightning protection device useful life short and inconvenient problem is installed.
For solving the problems of the technologies described above, the technical solution of the utility model is: the lightning protection device of overhead transmission line comprises the shaft tower on transmission line, cross-arm on shaft tower, cross-arm under shaft tower, hang respectively on described shaft tower two lower wires below cross-arm under the upper conductor below cross-arm and described shaft tower by line insulator, be provided with lightning protection device on described shaft tower, described lightning protection device is included in cross-arm on the discharging gap of installing between cross-arm under cross-arm and described shaft tower on described shaft tower, on described discharging gap, cross-arm is fixed on described shaft tower, and be positioned at the below of described upper conductor hitch point, on described discharging gap, the length of cross-arm on bearing of trend is greater than the length of cross-arm on bearing of trend on described shaft tower, cross-arm under the discharging gap of installing below cross-arm under described shaft tower, under described discharging gap, cross-arm is fixed on described shaft tower, and, below two described lower wire hitch points, under described discharging gap, the length of cross-arm on bearing of trend is greater than the length of cross-arm on bearing of trend under described shaft tower.
As further improvement, on described discharging gap, an end of the described upper conductor of correspondence of cross-arm is provided with the circular arc upper limb.
As further improvement, under described discharging gap, two ends of two described lower wires of correspondence of cross-arm are respectively equipped with the circular arc upper limb.
As further improvement, be equipped with arc parallels and installing hole on cross-arm under cross-arm and described discharging gap on described discharging gap, by described arc parallels and described installing hole, be fixed on described shaft tower.
After adopting technique scheme, the beneficial effects of the utility model are: because the lightning protection device of overhead transmission line described in the utility model is included on described shaft tower, under cross-arm and described shaft tower, between cross-arm, cross-arm on discharging gap is installed, on described discharging gap, cross-arm is fixed on described shaft tower, and, below described upper conductor hitch point, on described discharging gap, the length of cross-arm on bearing of trend is greater than the length of cross-arm on bearing of trend on described shaft tower.Formed discharging gap between the end of cross-arm below described upper conductor hitch point and on the discharging gap below described upper conductor hitch point, the insulation property of this discharging gap are less than insulator, when the thunderbolt shaft tower, the high potential that powerful lightning current produces on shaft tower punctures discharging gap, by earth electrode, lightning current is imported to the earth, played the effect of lightning protection.Equally due to cross-arm under discharging gap being installed below cross-arm under described shaft tower, under described discharging gap, cross-arm is fixed on described shaft tower, and, below described lower wire hitch point, under described discharging gap, the length of cross-arm on bearing of trend is greater than the length of cross-arm on bearing of trend under described shaft tower.Formed discharging gap between the end of cross-arm under the described discharging gap of each described lower wire that under described shaft tower, cross-arm hangs and described lower wire hitch point below, the insulation property of this discharging gap are less than insulator, when the thunderbolt shaft tower, the high potential that powerful lightning current produces on shaft tower punctures discharging gap, by earth electrode, lightning current is imported to the earth, played the effect of lightning protection.
Wherein: on above-mentioned discharging gap, an end of the described upper conductor of correspondence of cross-arm is provided with the circular arc upper limb, can form more rational discharging gap, has avoided edge effect simultaneously.
Wherein: under above-mentioned discharging gap, two ends of two described lower wires of correspondence of cross-arm are respectively equipped with the circular arc upper limb, can form more rational discharging gap, avoid edge effect simultaneously.
Wherein: be equipped with arc parallels and installing hole on cross-arm under cross-arm and above-mentioned discharging gap on above-mentioned discharging gap, be fixed on described shaft tower by described arc parallels and described installing hole, make easy for installationly, reduce workload.
The accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the amplification front elevation of cross-arm under discharging gap in Fig. 1;
Fig. 3 is the amplification plan view of cross-arm under discharging gap in Fig. 1;
In figure: cross-arm, 5-insulator, 6-upper conductor, 7-lower wire, 8-upper limb, 9-arc parallels, 10-installing hole under cross-arm, 4-discharging gap on cross-arm, 3-discharging gap under cross-arm, 2-shaft tower on 1-shaft tower.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As Fig. 1, shown in Fig. 2 and Fig. 3, the lightning protection device of overhead transmission line comprises the shaft tower on transmission line, on shaft tower, cross-arm 1, under shaft tower, cross-arm 2, hang respectively on described shaft tower two lower wires 7 below cross-arm 2 under the upper conductor below cross-arm 16 and described shaft tower by line insulator 5, be provided with lightning protection device on described shaft tower, described lightning protection device is included in cross-arm 3 on the discharging gap of installing between cross-arm 2 under cross-arm 1 and described shaft tower on described shaft tower, on described discharging gap, cross-arm 3 is fixed on described shaft tower, and be positioned at the below of described upper conductor 6 hitch points, on described discharging gap, the length of cross-arm 3 on bearing of trend is greater than the length of cross-arm 1 on bearing of trend on described shaft tower, and on discharging gap, an end of the described upper conductor 6 of the correspondence of cross-arm 3 is provided with circular arc upper limb 8, under discharging gap, two ends of two described lower wires 7 of correspondence of cross-arm 4 are respectively equipped with circular arc upper limb 8.Be equipped with arc parallels 9 and installing hole 10 on discharging gap under cross-arm 3 and discharging gap on cross-arm 4, be fixed on shaft tower by this arc parallels 9 and installing hole 10.
Formed discharging gap below upper conductor 6 hitch points and between arc of circle upper limb 8, also formed discharging gap between lower wire 7 hitch point belows and arc of circle upper limb 8, the insulation property of this discharging gap are less than insulator 5, when the thunderbolt shaft tower, the high potential that powerful lightning current produces on shaft tower punctures discharging gap, by earth electrode, lightning current is imported to the earth, played the effect of lightning protection.
Wherein on discharging gap under cross-arm 3 and discharging gap cross-arm 4 adopt Zinc-coated angle steels to make, make lightning protection device durable, long service life.And the utility model is economical and practical, avoided because setting up lightning conducter large tracts of land damage Plants and civil puzzlement, and simple in structure, invest little, installation workload is little, result of use is good.
The above is preferred embodiment of the present utility model, not in order to limit the utility model, all any modifications of doing within spirit of the present utility model and principle, is equal to and replaces and improvement etc., within all should being included in protection range of the present utility model.
Claims (4)
1. the lightning protection device of overhead transmission line, comprise the shaft tower on transmission line, cross-arm on shaft tower, cross-arm under shaft tower, hang respectively on described shaft tower two lower wires below cross-arm under the upper conductor below cross-arm and described shaft tower by line insulator, it is characterized in that: on described shaft tower, be provided with lightning protection device, described lightning protection device is included in cross-arm on the discharging gap of installing between cross-arm under cross-arm and described shaft tower on described shaft tower, on described discharging gap, cross-arm is fixed on described shaft tower, and be positioned at the below of described upper conductor hitch point, on described discharging gap, the length of cross-arm on bearing of trend is greater than the length of cross-arm on bearing of trend on described shaft tower, cross-arm under the discharging gap of installing below cross-arm under described shaft tower, under described discharging gap, cross-arm is fixed on described shaft tower, and, below two described lower wire hitch points, under described discharging gap, the length of cross-arm on bearing of trend is greater than the length of cross-arm on bearing of trend under described shaft tower.
2. the lightning protection device of overhead transmission line according to claim 1, it is characterized in that: on described discharging gap, an end of the described upper conductor of correspondence of cross-arm is provided with the circular arc upper limb.
3. the lightning protection device of overhead transmission line according to claim 1, it is characterized in that: under described discharging gap, two ends of two described lower wires of correspondence of cross-arm are respectively equipped with the circular arc upper limb.
4. according to the lightning protection device of the described overhead transmission line of claims 1 to 3 any one, it is characterized in that: be equipped with arc parallels and installing hole on cross-arm under cross-arm and described discharging gap on described discharging gap, and be fixed on described shaft tower by described arc parallels and described installing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320397562 CN203352118U (en) | 2013-07-04 | 2013-07-04 | Lightning protection device of overhead transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320397562 CN203352118U (en) | 2013-07-04 | 2013-07-04 | Lightning protection device of overhead transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203352118U true CN203352118U (en) | 2013-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320397562 Expired - Fee Related CN203352118U (en) | 2013-07-04 | 2013-07-04 | Lightning protection device of overhead transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203352118U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347042A (en) * | 2018-09-30 | 2019-02-15 | 国网浙江平阳县供电有限责任公司 | The mounting structure and installation method of ground wire are protected on a kind of straight line pole |
-
2013
- 2013-07-04 CN CN 201320397562 patent/CN203352118U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347042A (en) * | 2018-09-30 | 2019-02-15 | 国网浙江平阳县供电有限责任公司 | The mounting structure and installation method of ground wire are protected on a kind of straight line pole |
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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 |
Granted publication date: 20131218 Termination date: 20170704 |
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| CF01 | Termination of patent right due to non-payment of annual fee |