CN203871821U - Lightning protection device used for high-voltage power transmission line - Google Patents

Lightning protection device used for high-voltage power transmission line Download PDF

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Publication number
CN203871821U
CN203871821U CN201420284609.1U CN201420284609U CN203871821U CN 203871821 U CN203871821 U CN 203871821U CN 201420284609 U CN201420284609 U CN 201420284609U CN 203871821 U CN203871821 U CN 203871821U
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China
Prior art keywords
insulator
arc electrode
protection device
lightning protection
arc
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CN201420284609.1U
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Chinese (zh)
Inventor
邓明亮
彭勇
曾健
李心强
戴国军
杨紫旺
姜星宇
崔顺心
何内
曾武英
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Yiyang Electric Power Survey And Design Institute Co Ltd
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Yiyang Electric Power Survey And Design Institute Co Ltd
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Abstract

The utility model discloses a lightning protection device used for a high-voltage power transmission line. The lightning protection device comprises an insulator of which the upper end is fixed on a high-voltage electric wire and a zinc oxide lightning arrester which is fixedly connected with the lower end of the insulator. The upper end of the insulator is fixedly provided with a first arc-striking electrode which is electrically connected with the high-voltage electric wire. The lower end of the insulator is fixedly provided with a second arc-striking electrode which is electrically connected with the high-voltage end of the zinc oxide lightning arrester. The low-voltage end of the zinc oxide lightning arrester is connected with a grounding conductive wire. A discharge gap, of which discharge voltage is less than flashover voltage of the insulator, is formed between the first arc-striking electrode and the second arc-striking electrode. The lightning protection device also comprises an adjusting mechanism capable of adjusting the discharge gap between the first arc-striking electrode and the second arc-striking electrode. The second arc-striking electrode is connected with the lower end of the insulator via the adjusting mechanism. The lightning protection device has advantages of being stable in work, convenient to install and adjust, high in reliability, long in the service life, etc.

Description

Lightning protection device for ultra-high-tension power transmission line
Technical field
The utility model relates to transmission line shocking preventing technology field, is specifically related to a kind of lightning protection device for ultra-high-tension power transmission line.
Background technology
In ultra-high-tension power transmission line, transmission pressure is easy to cause because of thunderbolt the generation of broken string or trip accident, and the main cause that causes broken string is on lightning stroke flashover passage, to build arc to form power frequency continued flow, and the temperature of arc root is very high, can at short notice wire be blown.Therefore, conventionally lightning protection device need to be set on ultra-high-tension power transmission line, to avoid the generation of above-mentioned situation.
The lightning protection measures that existing ultra-high-tension power transmission line is taked is generally that overhead ground wire, puncture arc-preventing metal utensil, lightning protection pillar insulator and zinc oxide are installed is lightning-arrest etc., but still there are various problems in these measures, for example, inconvenience is adjusted in installation, lightning protection effect is not good, reliability is not high, useful life is long etc.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiency that prior art exists, and a kind of working stability is provided, the lightning protection device for ultra-high-tension power transmission line of easy to adjust, reliable height, long service life is installed.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
A kind of lightning protection device for ultra-high-tension power transmission line, comprise the zinc oxide arrester that upper end is fixed on the insulator on high-tension bus-bar and is fixedly connected on described insulator lower end, described insulator upper end is fixed with the first arc electrode being electrically connected to high-tension bus-bar, described insulator lower end is fixed with the second arc electrode being electrically connected to the high-pressure side of described zinc oxide arrester, the low-pressure end of described zinc oxide arrester is connected with earth lead, between described the first arc electrode and the second arc electrode, form the discharging gap that discharge voltage is less than the flashover voltage of the insulator, described lightning protection device also comprises the governor motion of the discharging gap between adjustable described the first arc electrode and the second arc electrode, described the second arc electrode is connected in described insulator lower end by described governor motion.
As further improvement of the utility model:
Described governor motion comprises and is removably connected to the support plate of described insulator lower end and is fixed in the adjusting screw(rod) on described the second arc electrode, on described support plate, offers screwed hole, and described adjusting screw(rod) is connected with described screwed hole threaded engagement.
Described support plate is bolted on the connection gold utensil of described insulator lower end.
Described the first arc electrode is provided with the first ball head, and described the second arc electrode is provided with the second ball head, between described the first ball head and the second ball head, forms described discharging gap.
The high-pressure side of described zinc oxide arrester is fixedly connected on the connection gold utensil of described insulator lower end by screw.
Described the first arc electrode is by the dismountable connection gold utensil that is connected in described insulator upper end of bolt.
Compared with prior art, the utility model has the advantage of: the utility model is for the lightning protection device of ultra-high-tension power transmission line, can effectively avoid causing the generation of tripping operation and broken string accident because thunderbolt makes insulator generation flashover, its working stability is reliable, install and adjust convenient, the first arc electrode and the second arc electrode are all fixedly installed on insulator, discharging gap can not changed the in the situation that of high-tension bus-bar and insulator swing again, guaranteed the stability of electric discharge; Meanwhile, the second arc electrode is connected in insulator lower end by governor motion, can adjust the discharging gap between the first arc electrode and the second arc electrode, reduces and manufactures and assembly difficulty.During installation, lightning protection device can be assembled, then integral installation is to high-tension bus-bar, has greatly shortened the time of work high above the ground, has improved installation effectiveness, has reduced the risk of work high above the ground.
Accompanying drawing explanation
Fig. 1 is that the utility model is for the main TV structure schematic diagram of the lightning protection device of ultra-high-tension power transmission line.
Marginal data:
1, insulator; 2, zinc oxide arrester; 3, the first arc electrode; 31, the first ball head; 4, the second arc electrode; 41, the second ball head; 5, governor motion; 51, support plate; 511, screwed hole; 52, adjusting screw(rod); 6, high-tension bus-bar; 7, bolt.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the utility model is for the lightning protection device of ultra-high-tension power transmission line, comprise insulator 1 and zinc oxide arrester 2, insulator 1 upper end is fixed on high-tension bus-bar 6, the high-pressure side of zinc oxide arrester 2 is fixedly connected on the connection gold utensil of insulator 1 lower end by screw, above-mentioned insulator 1 and zinc oxide arrester 2 are existing standard fitting, do not repeat them here.Insulator 1 upper end is provided with the first arc electrode 3 being electrically connected to high-tension bus-bar 6, insulator 1 lower end is provided with the second arc electrode 4 being electrically connected to the high-pressure side of zinc oxide arrester 2, the first arc electrode 3 and the second arc electrode 4 adopt resistant to elevated temperatures metal material to make, the low-pressure end of zinc oxide arrester 2 is connected with earth lead (not shown), the first arc electrode 3 and the second arc electrode 4 are oppositely arranged, form discharging gap between the two, when transmission line normally moves, zinc oxide arrester 2 is isolated by discharging gap and the power-frequency voltage of the first arc electrode 3 and the second arc electrode 4, zinc oxide arrester 2 bears voltage hardly, extended the useful life of zinc oxide arrester 2, discharging gap between the first arc electrode 3 and the second arc electrode 4 is rationally set, make the discharge voltage of this discharging gap be less than insulator 1 flashover voltage, when being struck by lightning, discharging gap between the first arc electrode 3 and the second arc electrode 4 is breakdown, zinc oxide arrester 2 bodies present Low ESR, lightning current is discharged into the earth by earth lead, after lightning impulse, power-frequency voltage is carried on zinc oxide arrester 2 bodies, the resistance moment change of zinc oxide arrester 2 bodies is large, the electric current passing through (arc current) is suppressed in lower numerical value, increase falls in discharging gap arc voltage, the insulation of discharging gap recovers rapidly, electric arc extinguishes within the extremely short time, power frequency continued flow is blocked completely, thereby prevent the tripping operation and the broken string accident that by lightning stroke flashover, are caused, ensure the reliability of power supply.
Meanwhile, lightning protection device also comprises that governor motion 5, the second arc electrodes 4 of the discharging gap between adjustable the first arc electrode 3 and the second arc electrode 4 are connected in insulator 1 lower end by governor motion 5.This governor motion 5 comprises support plate 51 and is fixed in the adjusting screw(rod) 52 on the second arc electrode 4, support plate 51 is connected on the connection gold utensil of insulator 1 lower end by bolt 7, be convenient to installation and removal, on support plate 51, offer screwed hole 511, adjusting screw(rod) 52 is connected with screwed hole 511 threaded engagement, screw adjusting screw(rod) 52, discharging gap between adjustable the first arc electrode 3 and the second arc electrode 4, like this, be convenient to adjust discharging gap to the size of setting, assurance zinc oxide arrester 2 is normally worked, and has also reduced the difficulty of manufacturing and installing.
The utility model is for the lightning protection device of ultra-high-tension power transmission line, can effectively avoid, because thunderbolt makes insulator 1, the generation that flashover causes tripping operation and broken string accident occurs, its working stability is reliable, install and adjust convenient, the first arc electrode 3 and the second arc electrode 4 are all fixedly installed on insulator 1, discharging gap can not changed the in the situation that of high-tension bus-bar 6 and insulator 1 swing again, guaranteed the stability of electric discharge.During installation, can first insulator 1, zinc oxide arrester 2 first arc electrodes 3, the second arc electrode 4 and governor motion 5 be assembled, then integral installation is to high-tension bus-bar 6, has greatly shortened the time of work high above the ground, improve installation effectiveness, reduced the risk of work high above the ground.
In the present embodiment, the first arc electrode 3 is provided with the first ball head 31, the second arc electrode 4 is provided with the second ball head 41, between the first ball head 31 and the second ball head 41, form discharging gap, the first arc electrode 3 and the second arc electrode 4 adopt ball head structure more easily to attract electric discharge, and resistance to electric shock ability is strong, high life.
In the present embodiment, the first arc electrode 3 is also connected on the connection gold utensil of insulator 1 upper end by bolt 7, is convenient to install and changes, and the first arc electrode 3 and the second arc electrode 4 all can batch makings, reduced production cost.
The above is only preferred implementation of the present utility model, and protection range of the present utility model is also not only confined to above-described embodiment.For those skilled in the art, do not departing under the utility model technical conceive prerequisite resulting improvement and conversion also should be considered as protection range of the present utility model.

Claims (6)

1. the lightning protection device for ultra-high-tension power transmission line, it is characterized in that: comprise the zinc oxide arrester (2) that upper end is fixed on the insulator (1) on high-tension bus-bar (6) and is fixedly connected on described insulator (1) lower end, described insulator (1) upper end is fixed with the first arc electrode (3) being electrically connected to high-tension bus-bar (6), described insulator (1) lower end is fixed with the second arc electrode (4) being electrically connected to the high-pressure side of described zinc oxide arrester (2), the low-pressure end of described zinc oxide arrester (2) is connected with earth lead, between described the first arc electrode (3) and the second arc electrode (4), form the discharging gap that discharge voltage is less than insulator (1) flashover voltage, described lightning protection device also comprises the governor motion (5) of the discharging gap between adjustable described the first arc electrode (3) and the second arc electrode (4), described the second arc electrode (4) is connected in described insulator (1) lower end by described governor motion (5).
2. the lightning protection device for ultra-high-tension power transmission line according to claim 1, it is characterized in that: described governor motion (5) comprises and is removably connected to the support plate (51) of described insulator (1) lower end and is fixed in the adjusting screw(rod) (52) on described the second arc electrode (4), on described support plate (51), offer screwed hole (511), described adjusting screw(rod) (52) is connected with described screwed hole (511) threaded engagement.
3. the lightning protection device for ultra-high-tension power transmission line according to claim 2, is characterized in that: described support plate (51) is connected on the connection gold utensil of described insulator (1) lower end by bolt (7).
4. according to the lightning protection device for ultra-high-tension power transmission line described in claim 1 or 2 or 3, it is characterized in that: described the first arc electrode (3) is provided with the first ball head (31), described the second arc electrode (4) is provided with the second ball head (41), between described the first ball head (31) and the second ball head (41), forms described discharging gap.
5. according to the lightning protection device for ultra-high-tension power transmission line described in claim 1 or 2 or 3, it is characterized in that: the high-pressure side of described zinc oxide arrester (2) is fixedly connected on the connection gold utensil of described insulator (1) lower end by screw.
6. according to the lightning protection device for ultra-high-tension power transmission line described in claim 1 or 2 or 3, it is characterized in that: described the first arc electrode (3) is by the dismountable connection gold utensil that is connected in described insulator (1) upper end of bolt (7).
CN201420284609.1U 2014-05-30 2014-05-30 Lightning protection device used for high-voltage power transmission line Active CN203871821U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420284609.1U CN203871821U (en) 2014-05-30 2014-05-30 Lightning protection device used for high-voltage power transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420284609.1U CN203871821U (en) 2014-05-30 2014-05-30 Lightning protection device used for high-voltage power transmission line

Publications (1)

Publication Number Publication Date
CN203871821U true CN203871821U (en) 2014-10-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106782937A (en) * 2017-01-20 2017-05-31 刘进生 Lightning protection porcelain bottle insulators with safety guard
CN111431129A (en) * 2020-05-08 2020-07-17 湖南省湘电试研技术有限公司 Transmission line without lightning conductor
CN111952920A (en) * 2020-08-11 2020-11-17 国网山东省电力公司费县供电公司 Lightning protection system of distribution lines
CN113284682A (en) * 2021-05-14 2021-08-20 国网北京市电力公司 Strain insulator assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106782937A (en) * 2017-01-20 2017-05-31 刘进生 Lightning protection porcelain bottle insulators with safety guard
CN111431129A (en) * 2020-05-08 2020-07-17 湖南省湘电试研技术有限公司 Transmission line without lightning conductor
CN111952920A (en) * 2020-08-11 2020-11-17 国网山东省电力公司费县供电公司 Lightning protection system of distribution lines
CN113284682A (en) * 2021-05-14 2021-08-20 国网北京市电力公司 Strain insulator assembly

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