CN211127072U - Device for preventing overhead transmission line from lightning counterattack - Google Patents
Device for preventing overhead transmission line from lightning counterattack Download PDFInfo
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- CN211127072U CN211127072U CN201921993612.XU CN201921993612U CN211127072U CN 211127072 U CN211127072 U CN 211127072U CN 201921993612 U CN201921993612 U CN 201921993612U CN 211127072 U CN211127072 U CN 211127072U
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Abstract
The utility model discloses an avoid overhead transmission line to suffer device of thunder and lightning counterattack, including earth mat and at least a set of lightning-arrest subassembly, lightning-arrest subassembly includes lightning rod, first insulation separator, mount pad and two piece at least ground lead, the lightning rod is located on the first insulation separator, first insulation separator locates on the mount pad, the mount pad be used for fixed extremely the shaft tower top, ground lead both ends respectively with the lightning rod with the earth mat electricity is connected. Thunder and lightning are discharged through the lightning rod and the grounding lead, and the thunder and lightning are not discharged through the tower, so that the insulator on the power transmission line is effectively prevented from being broken down due to the counterattack of the thunder and lightning, and the lightning trip-out rate of a power grid is remarkably reduced.
Description
Technical Field
The utility model relates to a high voltage power line lightning protection technical field, concretely relates to avoid overhead transmission line to suffer device that thunder and lightning counterattack.
Background
With the rapid development of the power industry, the coverage of the power transmission line is continuously enlarged, and the number of trip accidents of the power transmission line caused by lightning stroke is increased day by day. Because the transmission line is located in open area mostly, even erect along the mountain ridge, river and highway that the risk of thunderbolt is big, expose in the environment of direct lightning, the accident rate that the transmission line arouses of thunderbolt is higher, has brought huge challenge for electric wire netting safe operation.
The transmission line is used as a charged metal carrier, has a strong lightning attracting effect, is higher in height from the ground, and is insufficient in shielding a wire from lightning stroke damage because a plurality of established towers are positive protection angles. In order to reduce the lightning trip-out rate of a power transmission line and ensure the safe operation of a power grid, some lightning protection measures have been adopted in the power grid industry at present according to the actual conditions of a field, for example, a lightning rod is arranged at a position where a line is easily subjected to direct lightning attack so as to avoid the direct lightning attack on the line or a pole tower. The lightning rod is connected to a tower which is then connected with the lightning protection grounding network; through research and test of the applicant, the existing arrangement mode is easy to generate counterattack and far cannot achieve the expected effect of installing the lightning rod.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks and deficiencies of the prior art, it would be desirable to provide an apparatus for protecting an overhead transmission line from lightning counterstrikes.
In order to overcome the deficiency of the prior art, the utility model provides a technical scheme is:
the utility model provides an avoid overhead transmission line to suffer device of thunder and lightning counterattack, its special character lies in, including earth mat and at least a set of lightning-arrest subassembly, lightning-arrest subassembly includes lightning rod, first insulation isolation piece, mount pad and an at least ground lead, the lightning rod is located on the first insulation isolation piece, first insulation isolation piece is located on the mount pad, the mount pad be used for fixed extremely the shaft tower top, ground lead both ends respectively with the lightning rod with the earth mat electricity is connected.
The at least one grounding lead comprises two grounding leads, and the two grounding leads are respectively and electrically connected with the lightning rod and the ground grid.
Further, the lightning rod is a pre-discharge lightning rod.
Further, at least one group of lightning protection components comprises a plurality of groups of lightning protection components.
Further, the device also comprises a second insulating isolation piece, and the second insulating isolation piece is connected between the grounding lead and the tower.
Further, the mount pad includes two parallel arrangement's channel-section steel, two the channel-section steel passes through coupling assembling to be connected, coupling assembling can adjust two interval between the channel-section steel.
Furthermore, the lightning rod is detachably connected with the first insulating spacer through the first connecting flange, and the first insulating spacer is detachably connected with the mounting seat through the second connecting flange.
Furthermore, the device also comprises a grounding wire clamp, wherein the grounding wire clamp is arranged on the lightning rod, and the grounding lead is respectively used for electrically connecting the lightning rod with the ground grid through the grounding wire clamp.
Furthermore, the part of the grounding lead close to the ground grid is provided with a wire breaking clamp, the part of the grounding lead between the wire breaking clamp and the lightning rod is an insulated wire, and the part of the grounding lead between the wire breaking clamp and the ground grid is made of flat steel or round steel.
Further, the first insulating spacer and the second insulating spacer each include a plurality of disc-shaped insulators connected in series in this order.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses an avoid overhead transmission line to suffer device of thunder and lightning counterattack, including earth mat and at least a set of lightning-arrest subassembly, lightning-arrest subassembly includes lightning rod, first insulation isolation piece, mount pad and two piece at least ground lead, the lightning rod is located on the first insulation isolation piece, first insulation isolation piece is located on the mount pad, the mount pad be used for fixed extremely the shaft tower top, ground lead both ends respectively with the lightning rod with the earth mat electricity is connected. Thunder and lightning are discharged through the lightning rod and the grounding lead, and the thunder and lightning are not discharged through the tower, so that the insulator on the power transmission line is effectively prevented from being broken down due to the counterattack of the thunder and lightning, and the lightning trip-out rate of a power grid is remarkably reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a three-dimensional structure diagram of a device for preventing an overhead transmission line from lightning counterattack according to an embodiment of the present invention;
fig. 2 is a three-dimensional structure diagram that lightning rod, first insulation spacer and mount pad that the embodiment of the utility model provides are connected.
In the figure: 1-ground screen, 2-lightning rod, 3-first insulating isolator, 4-grounding lead, 5-mounting seat, 51-channel steel, 52-connecting component, 6-second insulating isolator, 7-first connecting flange, 8-second connecting flange and 9-grounding wire clamp.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As mentioned in the background art, in order to reduce the lightning trip-out rate of the power transmission line and ensure the safe operation of the power grid, some lightning protection measures have been taken in the power grid industry at present according to the actual conditions of the site, for example, a lightning rod is installed at a position where the line is easily subjected to direct lightning strike, so as to avoid the direct lightning strike on the line or the pole tower. The lightning rod is connected to a tower which is then connected with the lightning protection grounding network; through research and test of the applicant, the existing arrangement mode is easy to generate counterattack and far cannot achieve the expected effect of installing the lightning rod.
Therefore, how to provide a lightning arrester and arrange reasonably to improve the lightning protection effect so as to reduce the lightning trip-out rate of the power transmission line is the improvement direction of the application. The embodiment provides a device for preventing an overhead transmission line from being subjected to lightning counterattack so as to achieve the purpose.
Referring to fig. 1 and 2, a specific structure of the device for preventing the overhead transmission line from being struck by the lightning is shown. The device comprises an earth screen 1 and at least one group of lightning protection assemblies, wherein each lightning protection assembly comprises a lightning rod 2, a first insulating isolator 3, a mounting seat 5 and at least one grounding lead 4.
The lightning rod 2 is arranged on the first insulating isolator 3, the first insulating isolator 3 is arranged on the mounting seat 5, the mounting seat 5 is used for being fixed to the top of the tower, and two ends of the grounding lead 4 are respectively electrically connected with the lightning rod 2 and the ground grid 1.
Thunder is discharged through the lightning rod 2 and the grounding lead 4 instead of through a tower, so that the insulator on the power transmission line is effectively prevented from being broken down due to lightning counterattack, and the lightning trip-out rate of a power grid is remarkably reduced.
In this embodiment, the at least one ground lead includes two ground leads 4, and the two ground leads 4 are electrically connected to the lightning rod 2 and the ground grid 1, respectively. The thunder and lightning is high frequency current, can produce the inductive reactance when the thunder and lightning flows through the earth connection, introduces earthing network 1 through two parallelly connected circuits and can make the inductive reactance show the reduction, greatly reduced the thunder and lightning current and receive the hindrance when flowing in earthing network 1 through ground lead 4.
In order to connect the grounding lead 4 with the lightning rod 2 conveniently, the device further comprises a grounding line card 9, the grounding line card 9 is arranged on the lightning rod 2, and the two grounding leads 4 are used for electrically connecting the lightning rod 2 with the ground network 1 through the grounding line card 9 respectively.
Furthermore, the part of the ground lead 4 close to the ground grid 1 is provided with a wire breaking clamp, the part of the ground lead 4 between the wire breaking clamp and the lightning rod 2 is an insulated wire, and the part of the ground lead 4 between the wire breaking clamp and the ground grid 1 is made of flat steel or round steel.
The lightning rod 2 is a pre-discharge lightning rod. The pre-discharge lightning rod comprises but is not limited to the structure shown in the embodiment, and mainly utilizes that when a thundercloud electric field changes, a needle head preempts surrounding objects to generate an upward lightning guide, and meets with a downward guide of the thundercloud in advance to form a main discharge channel, so that the protection radius is greatly increased.
In this embodiment, the at least one set of lightning protection components may comprise a plurality of sets of lightning protection components. When the tower head size is bigger, in order to guarantee the lightning protection effect and implement convenience, can select to set up several groups of lightning protection subassemblies more according to the performance and the on-the-spot actual conditions of lightning protection subassembly to rationally distribute the distance between two adjacent lightning protection subassemblies.
In the present embodiment, in order to completely insulate the ground lead 4 from the tower, it is not easily broken down even by a lightning strike. The device also comprises a second insulating spacer 6, wherein the second insulating spacer 6 is connected between the grounding lead 4 and the tower.
It should be noted that the first insulating spacer 3 and the second insulating spacer 6 are both insulating pillars, and each insulating pillar includes a plurality of disc-shaped insulators connected in series in sequence. The disk-shaped insulator is usually made of glass or ceramic or a composite material.
In this embodiment, in order to facilitate the disassembly and assembly and maintenance, the device further includes a first connecting flange 7 and a second connecting flange 8, the lightning rod 2 is detachably connected to the first insulating spacer 3 through the first connecting flange 7, and the first insulating spacer 3 is detachably connected to the mounting base 5 through the second connecting flange 8.
The mount pad 5 includes two parallel arrangement's U type channel-section steel 51, two channel-section steel 51 passes through coupling assembling 52 and connects, coupling assembling 52 can adjust two interval between the channel-section steel 51. By adjusting the distance between the two channel steels 51, the connecting piece can adapt to connecting pieces with different shapes and specifications on a tower.
Specifically, coupling assembling 52 includes bolt and nut, and the link on with the shaft tower is arranged in between two channel-section steels 51 during the connection, adopts the bolt to pass channel-section steel 51, link and the opposite side channel-section steel 51 of one side in proper order after, and the nut of screwing compresses tightly.
It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.
Claims (10)
1. The utility model provides an avoid overhead transmission line to suffer device of thunder and lightning counterattack, its characterized in that, includes ground net and at least a set of lightning-arrest subassembly, lightning-arrest subassembly includes lightning rod, first insulation separator, mount pad and an at least ground lead, the lightning rod is located on the first insulation separator, first insulation separator is located on the mount pad, the mount pad is used for fixing to the shaft tower top, ground lead both ends respectively with the lightning rod with the ground net electricity is connected.
2. The apparatus of claim 1, wherein the apparatus comprises two grounding leads electrically connected to the lightning rod and the ground grid, respectively.
3. The apparatus of claim 1 wherein the lightning conductor is a pre-discharge lightning conductor.
4. The apparatus of claim 3, comprising a plurality of sets of lightning protection assemblies.
5. The apparatus of claim 3, further comprising a second insulating spacer connected between the ground lead and the tower.
6. The device for avoiding lightning counterattack on an overhead transmission line according to claim 5, wherein the mounting seat comprises two parallel steel channels, the two steel channels are connected through a connecting component, and the connecting component can adjust the distance between the two steel channels.
7. The apparatus of claim 6, further comprising a first connecting flange and a second connecting flange, wherein the lightning rod is detachably connected to the first insulating spacer through the first connecting flange, and the first insulating spacer is detachably connected to the mounting base through the second connecting flange.
8. The apparatus for avoiding overhead transmission lines from lightning counterattack according to claim 7, further comprising a grounding line clip, wherein the grounding line clip is disposed on the lightning rod, and the grounding lead electrically connects the lightning rod with the ground grid through the grounding line clip, respectively.
9. The device for avoiding overhead transmission lines from lightning counterattack according to claim 8, wherein the grounding lead is provided with a wire breaking clip at a part close to the ground grid, the part of the grounding lead between the wire breaking clip and the lightning rod is an insulated wire, and the part of the grounding lead between the wire breaking clip and the ground grid is made of flat steel or round steel.
10. The apparatus of claim 5, wherein the first and second insulating spacers each comprise a plurality of disc-shaped insulators connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921993612.XU CN211127072U (en) | 2019-11-18 | 2019-11-18 | Device for preventing overhead transmission line from lightning counterattack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921993612.XU CN211127072U (en) | 2019-11-18 | 2019-11-18 | Device for preventing overhead transmission line from lightning counterattack |
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| CN211127072U true CN211127072U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921993612.XU Active CN211127072U (en) | 2019-11-18 | 2019-11-18 | Device for preventing overhead transmission line from lightning counterattack |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736652A (en) * | 2020-12-21 | 2021-04-30 | 青岛海西重机有限责任公司 | Lightning rod combination device and crane comprising same |
| CN113193484A (en) * | 2021-04-30 | 2021-07-30 | 广东电网有限责任公司湛江供电局 | Lightning device for overhead line |
| CN114361947A (en) * | 2021-12-03 | 2022-04-15 | 湖南汇卓电力科技有限公司 | Power line carrier lightning protection device |
-
2019
- 2019-11-18 CN CN201921993612.XU patent/CN211127072U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736652A (en) * | 2020-12-21 | 2021-04-30 | 青岛海西重机有限责任公司 | Lightning rod combination device and crane comprising same |
| CN113193484A (en) * | 2021-04-30 | 2021-07-30 | 广东电网有限责任公司湛江供电局 | Lightning device for overhead line |
| CN114361947A (en) * | 2021-12-03 | 2022-04-15 | 湖南汇卓电力科技有限公司 | Power line carrier lightning protection device |
| CN114361947B (en) * | 2021-12-03 | 2023-01-24 | 湖南汇卓电力科技有限公司 | Power line carrier lightning protection device |
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