CN209785676U - novel air gap lightning arrester - Google Patents

novel air gap lightning arrester Download PDF

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Publication number
CN209785676U
CN209785676U CN201920862290.9U CN201920862290U CN209785676U CN 209785676 U CN209785676 U CN 209785676U CN 201920862290 U CN201920862290 U CN 201920862290U CN 209785676 U CN209785676 U CN 209785676U
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China
Prior art keywords
arrester
air gap
fitting
lightning
lightning arrester
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Application number
CN201920862290.9U
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Chinese (zh)
Inventor
魏兴元
曾国伟
唐金水
谢巧霞
张宇环
罗亮彬
潘勇胜
唐志泉
李德生
陈冠
冯梓军
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Guangdong Power Grid Co Ltd
Qingyuan Power Supply Bureau of Guangdong Power Grid Co Ltd
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Guangdong Power Grid Co Ltd
Qingyuan Power Supply Bureau of Guangdong Power Grid Co Ltd
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Application filed by Guangdong Power Grid Co Ltd, Qingyuan Power Supply Bureau of Guangdong Power Grid Co Ltd filed Critical Guangdong Power Grid Co Ltd
Priority to CN201920862290.9U priority Critical patent/CN209785676U/en
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Publication of CN209785676U publication Critical patent/CN209785676U/en
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Abstract

The utility model discloses a novel air gap arrester, which comprises a down-lead wire clamp, an arc striking rod, an insulator, an upper end hardware fitting, a lower end hardware fitting, a fixed hardware fitting and an arrester body; the upper end gold utensil is connected with the disconnector electric fuse, and the other end of electric fuse is connected with the disconnector electrode, and the lower extreme that breaks away from the disconnector electrode is connected in the arrester body, and the lower extreme gold utensil of arrester body rotate to be connected. The novel air gap lightning arrester can automatically fall down after the lightning arrester body is punctured, a discharge channel is cut off, and frequent tripping of the common air gap lightning arrester caused by the fact that the lightning arrester body is punctured is avoided; the lightning arrester body is easy to observe after falling down, the line patrol work difficulty and workload of operation maintenance personnel can be reduced, and the common air gap lightning arrester is difficult to observe; the operation maintainer can use the insulating operation stick to change the arrester body without power failure, and the lightning protection effect can be conveniently and rapidly recovered.

Description

Novel air gap lightning arrester
Technical Field
The utility model belongs to the technical field of the air gap arrester, especially, relate to a novel air gap arrester.
Background
The thunder damage is one of the main fault reasons of the overhead line of the distribution network and is always the key point of the operation and maintenance work of the distribution network. Lightning overvoltage caused by lightning strike easily causes flashover or breakdown of insulators in overhead lines, and causes line lightning breaking or tripping accidents. In order to prevent lightning accidents, the power grid enterprises widely apply the air gap lightning arrester, namely, the air gap lightning arrester and the lightning arrester body form a series connection relationship, and then the air gap lightning arrester is arranged beside the insulator to form another discharging channel. The lightning protection device has the effects that when an overhead line is struck by lightning, lightning current is led to the air gap lightning arrester, power frequency follow current is cut off, flashover or breakdown caused by the fact that the lightning current is discharged through the insulator is avoided, the overhead line is protected, the lightning stroke breakage is prevented, and the lightning stroke tripping frequency is reduced.
Under the condition of normal operation of a power grid, the air gap is in an insulating state, and the lightning arrester body does not bear voltage; under the action of lightning overvoltage, the air gap is broken down to discharge, the lightning arrester body is in a low-resistance state, a discharge channel is formed, lightning current is released into the ground, and the development of overvoltage is limited, so that an overhead line is protected, the lightning breakage is prevented, and the lightning trip is reduced. After the lightning surge, power frequency voltage (namely the working voltage carried by the line) is applied to the lightning arrester body, the resistance of the lightning arrester body is instantly increased, the passing current, namely the power frequency follow current, is restrained at a lower value, the arc voltage drop of the air gap is increased, the electric arc is naturally extinguished in a very short time, the insulation of the air gap is recovered, the power frequency follow current is completely cut off, and the system is recovered to a normal state.
In the existing air gap lightning arrester, because the lightning arrester body is made of the zinc oxide nonlinear resistance card, when the lightning arrester is subjected to overload lightning impact, the lightning arrester can be punctured, for example, after the lightning arrester is subjected to direct lightning or continuous multiple lightning strikes, the lightning arrester can be punctured, so that the lightning protection effect is lost.
After the lightning arrester body is punctured, the lightning protection effect is lost, and when lightning stroke discharges again, the power frequency afterflow can not be cut off, and the circuit tripping operation can be caused.
In addition, the arrester body is difficult to discover after being punctured, and operation maintainer is difficult to perceive at daily line in-process of patrolling, has increased the work degree of difficulty.
SUMMERY OF THE UTILITY MODEL
an object of the utility model is to provide a novel air gap arrester can make its automation fall when the arrester body is punctured to cut off the discharge passage, and reduce fortune dimension personnel work load.
To achieve the purpose, the utility model adopts the following technical proposal:
A novel air gap lightning arrester comprises a down-lead wire clamp, an arc-striking rod, an insulator, an upper end hardware fitting, a lower end hardware fitting, a fixing hardware fitting and a lightning arrester body;
The down lead wire clamp is fixed at the top end of the insulator, the arc striking rod is fixed at the upper end of the insulator, the fixing hardware fitting is fixed in the middle of the insulator, and the lower end hardware fitting is fixed at the lower end of the insulator;
The upper end fitting is fixed on the insulator between the fixing fitting and the arc striking rod, a separator electric fuse is connected to the upper end fitting, a separator electrode is connected to the other end of the electric fuse, the lower end of the separator electrode is connected to the lightning arrester body, and the lower end of the lightning arrester body is rotatably connected with the lower end fitting.
Optionally, the novel air gap arrester is fixed on the iron cross arm of the electric pole through the fixing hardware fitting.
Optionally, a disconnector fitting is arranged between the lower end fitting and the arrester body, hook-shaped structures are arranged at two ends of the disconnector fitting, and the hook-shaped structures at the two ends hook the lower end fitting and the arrester body respectively.
Optionally, a down lead wire is led out from the lead wire, and the down lead wire is connected to the down lead clamp.
Optionally, a grounding wire is led out of the lower-end hardware fitting.
compared with the prior art, the embodiment of the utility model provides a following beneficial effect has:
The embodiment of the utility model provides a novel air gap arrester, can fall automatically after the arrester body punctures, cut off the discharge passage, avoid the frequent tripping operation that ordinary air gap arrester arouses because the arrester body punctures; the lightning arrester body is easy to observe after falling down, the line patrol work difficulty and workload of operation maintenance personnel can be reduced, and the common air gap lightning arrester is difficult to observe; the operation maintainer can use the insulating operation stick to change the arrester body without power failure, and the lightning protection effect can be conveniently and rapidly recovered.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a novel air gap arrester provided by an embodiment of the present invention.
Fig. 2 is a schematic view of an installation structure of a novel air gap arrester provided by an embodiment of the present invention.
Fig. 3 is a comparison diagram of normal installation and automatic separation of a novel air gap arrester provided by the embodiment of the present invention.
Illustration of the drawings:
The lightning arrester comprises a down lead clamp 10, an arc striking rod 11, an insulator 12, a fixing fitting 13, a lower end fitting 14, an upper end fitting 15, a lightning arrester body 16, a disconnector electric fuse 17, a disconnector electrode 18, a disconnector fitting 19, a hook-shaped structure 20, an electric pole 21, a lead wire 22, a line insulation terminal 23, a down lead wire 24, an iron cross arm 25 and a grounding wire 26.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 to 3, the present embodiment provides a novel air gap lightning arrester, including a down conductor clamp 10, an arc striking rod 11, an insulator 12, an upper end fitting 15, a lower end fitting 14, a fixing fitting 13, and a lightning arrester body 16; the down conductor clamp 10 is fixed at the top end of the insulator 12, the arc striking rod 11 is fixed at the upper end of the insulator 12, the fixing hardware 13 is fixed in the middle of the insulator 12, and the lower end hardware 14 is fixed at the lower end of the insulator 12; the upper end hardware fitting 15 is fixed on the insulator 12 between the fixed hardware fitting 13 and the arc striking rod 11, the upper end hardware fitting 15 is connected with a disconnector electric fuse 17, the other end of the electric fuse is connected with a disconnector electrode 18, the lower end of the disconnector electrode 18 is connected to the lightning arrester body 16, and the lower end of the lightning arrester body 16 is rotatably connected with the lower end hardware fitting 14.
Wherein, fixed connection between fixed fitting 13 and iron cross arm 25 for this novel air gap arrester is fixed on pole 21. The down lead wire 24 is led out from the lead wire 22 and is connected with the down lead clamp 10, the lower part of the lead wire 22 is fixedly supported by the line insulation terminal 23, and finally the lower end fitting 14 is led out from the grounding wire 26 and is grounded.
further, the novel air gap lightning arrester is fixed on the iron cross arm 25 of the electric pole 21 through the fixing hardware 13.
Further, a disconnector fitting 19 is arranged between the lower end fitting 14 and the arrester body 16, hook-shaped structures 20 are arranged at two ends of the disconnector fitting 19, and the hook-shaped structures 20 at the two ends hook the lower end fitting 14 and the arrester body 16 respectively.
Therefore, when the disconnector fuse 17 is blown, the arrester body 16 automatically falls and hangs on the lower end fitting 14.
specifically, the theory of operation of this novel air gap arrester does:
(1) In a normal state, when no lightning overvoltage exists on the lead 22, the air gap between the arc striking rod 11 and the upper end hardware fitting 15 is in an insulating state, and the lightning arrester body 16 does not bear the power frequency voltage on the lead 22.
(2) When the lead 22 is struck by lightning, the lightning overvoltage is high, the air gap between the breakdown arc striking rod 11 and the upper end hardware fitting 15 is broken down to discharge, the resistance of the lightning arrester body 16 is reduced under the action of the high lightning overvoltage, the lightning current passes through the lightning arrester body 16, the auxiliary air gap formed between the disconnector electrode 18 and the disconnector electric fuse 17 is broken down to discharge, and then the auxiliary air gap is released to the ground through the lower end hardware fitting 14 and the grounding wire 26 connected with the disconnector electrode, so that a complete discharge channel is formed.
(3) After lightning current is released, power frequency voltage is loaded on the discharge channel, and because the power frequency voltage is lower, the resistance of the lightning arrester body 16 is increased under the action of the power frequency voltage, power frequency follow current in the whole discharge channel is limited to a small degree, discharge of an air gap cannot be maintained, arc extinction is completed in a short time, the air gap is recovered to an insulating state, a system is recovered to be normal, and tripping is not caused.
(4) the above is a state in which the arrester body 16 is intact.
(5) Under the condition that arrester body 16 was punctured, the lightning current release finishes the back, power frequency voltage loads on the discharge channel, because of the unable normal work of arrester body 16, power frequency continuous flow can last the arc, the arcing position is two, including the air gap between striking stick 11 and the upper end gold utensil 15, and the supplementary air gap who forms between disconnector electrode 18 and disconnector electric fuse 17, disconnector electric fuse 17 is fused under the electric arc ablation effect this moment, 19 actions of disconnector gold utensil, make arrester body 16 fall, cut off the discharge channel from this, make the system resume insulating.
(6) After the lightning arrester body 16 falls, the fortune dimension personnel observe very easily, can utilize insulating bar to change it, resume the normal lightning protection effect of this equipment.
In summary, according to the novel air gap arrester provided by the embodiment, the arrester body 16 can automatically fall down after breakdown, a discharge channel is cut off, and frequent tripping of a common air gap arrester caused by breakdown of the arrester body 16 is avoided; the lightning arrester body 16 is easy to observe after falling down, the line patrol work difficulty and workload of operation maintenance personnel can be reduced, and the ordinary air gap lightning arrester is difficult to observe; the operation maintainer can use the insulating operation rod to change the arrester body 16 without power failure, so that the lightning protection effect can be recovered quickly.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (5)

1. A novel air gap lightning arrester is characterized by comprising a down-leading wire clamp, an arc-leading rod, an insulator, an upper end hardware fitting, a lower end hardware fitting, a fixing hardware fitting and a lightning arrester body;
the down lead wire clamp is fixed at the top end of the insulator, the arc striking rod is fixed at the upper end of the insulator, the fixing hardware fitting is fixed in the middle of the insulator, and the lower end hardware fitting is fixed at the lower end of the insulator;
The upper end fitting is fixed on the insulator between the fixing fitting and the arc striking rod, a separator electric fuse is connected to the upper end fitting, a separator electrode is connected to the other end of the electric fuse, the lower end of the separator electrode is connected to the lightning arrester body, and the lower end of the lightning arrester body is rotatably connected with the lower end fitting.
2. The novel air gap arrester as claimed in claim 1, wherein the novel air gap arrester is fixed on the iron cross arm of the electric pole by the fixing hardware.
3. The novel air gap arrester of claim 1, wherein a disconnector fitting is arranged between the lower end fitting and the arrester body, hook-shaped structures are arranged at two ends of the disconnector fitting, and the hook-shaped structures at the two ends hook the lower end fitting and the arrester body respectively.
4. the arrester of claim 1 wherein a down conductor is routed from the conductor and is connected to the down clamp.
5. The novel air gap arrester of claim 4 wherein a ground lead leads from the lower end fitting.
CN201920862290.9U 2019-06-10 2019-06-10 novel air gap lightning arrester Active CN209785676U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920862290.9U CN209785676U (en) 2019-06-10 2019-06-10 novel air gap lightning arrester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920862290.9U CN209785676U (en) 2019-06-10 2019-06-10 novel air gap lightning arrester

Publications (1)

Publication Number Publication Date
CN209785676U true CN209785676U (en) 2019-12-13

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ID=68788705

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920862290.9U Active CN209785676U (en) 2019-06-10 2019-06-10 novel air gap lightning arrester

Country Status (1)

Country Link
CN (1) CN209785676U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112366647A (en) * 2021-01-13 2021-02-12 国网瑞嘉(天津)智能机器人有限公司 Drop-out arrester mounting tool and robot

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112366647A (en) * 2021-01-13 2021-02-12 国网瑞嘉(天津)智能机器人有限公司 Drop-out arrester mounting tool and robot

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