CN111739702A - Lightning protection flashover protector - Google Patents
Lightning protection flashover protector Download PDFInfo
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- CN111739702A CN111739702A CN202010392649.8A CN202010392649A CN111739702A CN 111739702 A CN111739702 A CN 111739702A CN 202010392649 A CN202010392649 A CN 202010392649A CN 111739702 A CN111739702 A CN 111739702A
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- conductive
- lightning protection
- arc
- conductor
- accommodating groove
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
- H01B17/46—Means for providing an external arc-discharge path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
Abstract
The invention discloses a lightning protection type flashover protector, and aims to provide a lightning protection type flashover protector which can not only avoid damage to an overhead conductor, but also effectively avoid the problem of single-phase ground fault in rainy days. It includes: the lightning arrester comprises a lightning arrester body, a first conducting base, a second conducting base and a conducting rod, wherein the conducting base is arranged at the lower end of the insulator; the arc striking device comprises an arc striking conductive piece and a conductive connecting piece for connecting the arc striking conductive piece and the conductive upper seat, wherein the arc striking conductive piece is positioned above the overhead conductor, a conductor accommodating groove with a downward opening is formed in the arc striking conductive piece, the overhead conductor penetrates through the conductor accommodating groove, and an upper discharge gap is formed between the overhead conductor and the inner wall of the conductor accommodating groove.
Description
Technical Field
The invention relates to the field of lightning protection of overhead conductors, in particular to a lightning protection type flashover protector.
Background
In recent years, lightning trip, disconnection and insulator flashover accidents of overhead conductors frequently occur, in order to solve the problem, a lightning protection pin insulator is generally adopted at present, and the current lightning protection pin insulator generally comprises an insulator, a conductive base arranged at the lower end of the insulator, a conductive upper seat arranged at the upper end of the insulator, a piercing wire clamp arranged on the conductive upper seat and a drainage rod electrically connected with the conductive upper seat, wherein one end of the drainage rod is electrically connected with the conductive upper seat, and a discharge gap is formed between the other end of the drainage rod and the conductive base. When the insulated conductor is struck by lightning, the discharge gap between the current guiding rod and the conductive base is broken down to form a current channel, so that the lightning current is released to the ground, and the lightning protection function of the equipment is realized.
The existing lightning protection pin insulator has the following problems that firstly, a piercing wire clamp pierces an insulating layer and is inserted into a conductor, so that an overhead conductor is damaged; secondly, the lightning protection pin insulator can prevent single-phase earth fault due to the isolation of the discharge gap under normal conditions, but under some special conditions, such as rainwater weather, the gap of the discharge gap is small, rainwater can be connected with the discharge gap, and single-phase earth fault occurs.
Further, in order to avoid the problem that the lightning protection pin insulator can cause damage to the overhead conductor, some inventors design a lightning flashover protector, for example, chinese patent publication No. CN210349489U, published 2020, 4, 17, the invention provides a multiple series gap lightning flashover protector, which includes an arc striking device and a lightning arrester body, the arc striking device includes an arc metal plate located below the conductor, a first discharge channel is formed between the arc metal plate of the arc striking device and the conductor, the lightning arrester body includes a discharge head and a discharge rod, a second discharge channel is formed between the discharge head and the discharge rod, which can avoid tripping of an electric power system due to lightning stroke, and improve power supply quality. Although this application can avoid causing destruction to the air wire, in some special circumstances, for example rainy weather, it is because the arc metal sheet is located the wire below, in the rainy day, when the rain on the wire falls on the arc metal sheet under the water, rainwater probably connects wire and arc metal sheet, and likewise, the discharge head with form the second discharge passageway between the discharge rod and also probably be connected by rainwater, lead to the problem that single-phase ground fault takes place.
Disclosure of Invention
The invention aims to provide a lightning protection type flashover protector which can not only avoid damaging an overhead conductor, but also effectively avoid the problem of single-phase ground fault in rainy weather.
The technical scheme of the invention is as follows:
a lightning protection type flashover protector comprising: the lightning arrester comprises a lightning arrester body, a first conducting base, a second conducting base and a conducting rod, wherein the conducting base is arranged at the lower end of the insulator; the arc striking device comprises an arc striking conductive piece and a conductive connecting piece for connecting the arc striking conductive piece and the conductive upper seat, wherein the arc striking conductive piece is positioned above the overhead conductor, a conductor accommodating groove with a downward opening is formed in the arc striking conductive piece, the overhead conductor penetrates through the conductor accommodating groove, and an upper discharge gap is formed between the overhead conductor and the inner wall of the conductor accommodating groove.
When lightning overvoltage occurs, the upper discharging gap and the lower discharging gap are broken down to form a current channel, so that lightning current is released to the ground, and the effect of protecting the overhead conductor is achieved. Meanwhile, the arc striking conductive piece of the arc striking device does not need to pierce the overhead conductor, so that the damage to the overhead conductor can be avoided. On the other hand, because the arc starting conductive piece is located overhead conductor's top, be equipped with the wire storage tank that the opening is down on the arc starting conductive piece, overhead conductor passes the wire storage tank, the clearance forms the discharge gap between the inner wall of overhead conductor and wire storage tank, so, in rainwater weather, the rainwater of drippage on the overhead conductor can not fall on the arc starting conductive piece, rainwater on the arc starting conductive piece also can flow down along the surface that the arc starting conductive piece was electrically conductive, and the lower limb through the arc starting conductive piece drips, can not fall on the overhead conductor, in order to avoid the discharge gap to be connected by the rainwater, thereby effectively avoid rainwater weather to take place single-phase ground fault's problem.
Preferably, the water retaining flanges extending outwards are arranged on the edges of the two ports of the wire accommodating groove. So, can block rainwater through the manger plate flange and drip to the overhead conductor to the port edge of wire storage tank, further avoid going up the discharge gap and being connected by the rainwater.
Preferably, the outer surface of the arc-striking conductive member is in the shape of a circular arc. Therefore, rainwater on the arc striking conductive piece can flow downwards along the outer surface of the arc striking conductive piece and can drip through the lower edge of the arc striking conductive piece.
Preferably, the wire accommodating groove is an arc groove. So, some enter into the water droplet on the wire storage tank inner wall, also can be along with the inner wall surface of wire storage tank down landing, avoid dripping on the overhead conductor, arouse the problem that the discharge gap is connected by the rainwater.
Preferably, the conductive connecting member includes a vertical conductive rod, a sliding conductive sleeve slidably disposed on the vertical conductive rod, a conductive connecting rod connecting the sliding conductive sleeve and the arc striking conductive member, and a fastening bolt disposed on the sliding conductive sleeve, and the fastening bolt is used for locking the sliding conductive sleeve to the vertical conductive rod. Thus, the distance between the upper discharge gaps can be adjusted by moving the sliding conductive sleeve on the vertical conductive rod.
Preferably, the cross section of the vertical conductive rod is rectangular, and the cross section of the inner hole of the sliding conductive sleeve is also rectangular.
Preferably, the length direction of the wire accommodating groove is parallel to the overhead wire.
Preferably, the outer side surface of the conductive base is provided with a arcing bulge matched with the drainage rod.
Preferably, the bottom surface of the conductive base is provided with a mounting bolt, and the mounting bolt is provided with a locking nut. So, can fix lightning protection type flashover protector on the cross arm of wire pole through construction bolt and lock nut.
The invention has the beneficial effects that: not only can avoid causing destruction to air wire, can effectively avoid rainwater weather to take place single-phase earth fault moreover.
Drawings
Fig. 1 is a schematic structural view of the lightning protection type flashover protector of the present invention.
Fig. 2 is a side view of an arc initiating conductive member of the lightning protection type flashover protector of the present invention.
In the figure:
the lightning arrester comprises a lightning arrester body 1, an insulator 1.1, a conductive base 1.2, a conductive upper seat 1.3, a current-guiding rod 1.4, a lower discharging gap 1.5 and a arcing bulge 1.6;
the arc striking device 2, the arc striking conductive piece 2.1, the wire accommodating groove 2.2 and the water retaining flange 2.3;
an overhead conductor 3;
the device comprises a conductive connecting piece 4, a vertical conductive rod 4.1, a sliding conductive sleeve 4.2 and a fastening bolt 4.3;
and a cross arm 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1, a lightning protection type flashover protector includes a lightning arrester body 1 and an arc striking device 2. The lightning arrester body comprises an insulator 1.1, a conductive base 1.2 arranged at the lower end of the insulator, a conductive upper seat 1.3 arranged at the upper end of the insulator and a current guiding rod 1.4 electrically connected with the conductive upper seat. One end of the drainage rod is electrically connected with the conductive upper seat, and a discharging gap 1.5 is formed between the other end of the drainage rod and the conductive base. The arc striking device comprises an arc striking conductive piece 2.1 and a conductive connecting piece 4 for connecting the arc striking conductive piece and the conductive upper seat. The arc-striking conductive member is located above the overhead conductor 3. The arc-striking conductive piece is provided with a lead accommodating groove 2.2 with a downward opening. The overhead conductor penetrates through the conductor accommodating groove, and an upper discharge gap is formed between the overhead conductor and the inner wall of the conductor accommodating groove.
When lightning overvoltage occurs, the upper discharging gap and the lower discharging gap are broken down to form a current channel, so that lightning current is released to the ground, and the effect of protecting the overhead conductor is achieved. Meanwhile, the arc striking conductive piece of the arc striking device does not need to pierce the overhead conductor, so that the damage to the overhead conductor can be avoided. On the other hand, because the arc starting conductive piece is located overhead conductor's top, be equipped with the wire storage tank that the opening is down on the arc starting conductive piece, overhead conductor passes the wire storage tank, the clearance forms the discharge gap between the inner wall of overhead conductor and wire storage tank, so, in rainwater weather, the rainwater of drippage on the overhead conductor can not fall on the arc starting conductive piece, rainwater on the arc starting conductive piece also can flow down along the surface that the arc starting conductive piece was electrically conductive, and the lower limb through the arc starting conductive piece drips, can not fall on the overhead conductor, in order to avoid the discharge gap to be connected by the rainwater, thereby effectively avoid rainwater weather to take place single-phase ground fault's problem.
Further, as shown in fig. 1 and 2, water retaining flanges 2.3 extending outward are disposed on both ends of the wire accommodating groove. So, can block rainwater through the manger plate flange and drip to the overhead conductor to the port edge of wire storage tank, further avoid going up the discharge gap and being connected by the rainwater.
The outer surface of the arc-striking conductive piece is arc-shaped. Therefore, rainwater on the arc striking conductive piece can flow downwards along the outer surface of the arc striking conductive piece and can drip through the lower edge of the arc striking conductive piece.
The wire accommodating groove is an arc groove. So, some enter into the water droplet on the wire storage tank inner wall, also can be along with the inner wall surface of wire storage tank down landing, avoid dripping on the overhead conductor, arouse the problem that the discharge gap is connected by the rainwater.
The length direction of the wire accommodating groove is parallel to the overhead wire.
In this embodiment, the arc-striking conductive member is a semicircular tube, and an inner cavity of the semicircular tube forms the wire accommodating groove.
Further, as shown in fig. 1, the conductive connecting member 4 includes a vertical conductive rod 4.1, a sliding conductive sleeve 4.2 slidably disposed on the vertical conductive rod, a conductive connecting rod connecting the sliding conductive sleeve and the arc-striking conductive member, and a fastening bolt 4.3 disposed on the sliding conductive sleeve. The fastening bolt is used for locking the sliding conductive sleeve on the vertical conductive rod. Thus, the distance between the upper discharge gaps can be adjusted by moving the sliding conductive sleeve on the vertical conductive rod.
The cross section of the vertical conducting rod is rectangular, and the cross section of the inner hole of the sliding conducting sleeve is also rectangular. Thus, the sliding conductive sleeve is prevented from rotating around the vertical conductive rod.
Further, as shown in fig. 1, the outer side surface of the conductive base is provided with a arcing protrusion 1.6 matched with the drainage rod. The lower discharging gap is positioned between the arc catching bulge and the drainage rod.
Furthermore, the bottom surface of the conductive base is provided with a mounting bolt, and the mounting bolt is provided with a locking nut. Thus, the lightning protection type flashover protector can be fixed on the cross arm 5 of the telegraph pole through the mounting bolt and the locking nut.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (8)
1. A lightning protection type flashover protector comprising:
the arrester body, the arrester body includes the insulator, sets up at the electrically conductive base of insulator lower extreme, sets up at the electrically conductive seat of honour of insulator upper end, the drainage stick of being connected with electrically conductive seat of honour electricity, and the one end and the electrically conductive seat of honour electricity of drainage stick are connected, form between the other end of drainage stick and the electrically conductive base and descend the electric clearance, and characterized by still includes:
the arc striking device comprises an arc striking conductive piece and a conductive connecting piece for connecting the arc striking conductive piece and the conductive upper seat, wherein the arc striking conductive piece is positioned above the overhead conductor, a conductor accommodating groove with a downward opening is formed in the arc striking conductive piece, the overhead conductor penetrates through the conductor accommodating groove, and an upper discharge gap is formed between the overhead conductor and the inner wall of the conductor accommodating groove.
2. The lightning protection type flashover protector according to claim 1, wherein both end port edges of the wire accommodating groove are provided with water blocking flanges formed to extend outward.
3. The lightning protection type flashover protector according to claim 1, wherein the outer surface of the arc initiating conductive member is arc-shaped.
4. The lightning protection type flashover protector according to claim 1, 2 or 3, wherein the wire accommodating groove is a circular arc groove.
5. The lightning protection type flashover protector according to claim 1, 2 or 3, wherein the conductive connecting member comprises a vertical conductive rod, a sliding conductive sleeve slidably disposed on the vertical conductive rod, a conductive connecting rod connecting the sliding conductive sleeve and the arc striking conductive member, and a fastening bolt disposed on the sliding conductive sleeve for locking the sliding conductive sleeve on the vertical conductive rod.
6. The lightning protection type flashover protector according to claim 5, wherein the vertical conducting rod is rectangular in cross section and the inner hole of the sliding conducting sleeve is also rectangular in cross section.
7. The lightning protection type flashover protector according to claim 1, 2 or 3, wherein the length direction of the conductor accommodating groove is parallel to the overhead conductor.
8. The lightning protection type flashover protector according to claim 1, 2 or 3, wherein the outer side surface of the conductive base is provided with arc catching protrusions matched with the drainage rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010392649.8A CN111739702B (en) | 2020-05-11 | 2020-05-11 | Lightning protection flashover protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010392649.8A CN111739702B (en) | 2020-05-11 | 2020-05-11 | Lightning protection flashover protector |
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| Publication Number | Publication Date |
|---|---|
| CN111739702A true CN111739702A (en) | 2020-10-02 |
| CN111739702B CN111739702B (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010392649.8A Active CN111739702B (en) | 2020-05-11 | 2020-05-11 | Lightning protection flashover protector |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH117853A (en) * | 1997-06-19 | 1999-01-12 | Tokyo Electric Power Co Inc:The | Current-limiting unit and current-limiting high-tension clamp insulator using it |
| CN201348907Y (en) * | 2009-01-20 | 2009-11-18 | 安徽省电力公司巢湖供电公司 | Lightning protector of 10kV line |
| CN106098264A (en) * | 2016-08-08 | 2016-11-09 | 国网湖南省电力公司 | A kind of 10kV Multifunctional disaster prevention evil insulator and preparation method |
| CN208209240U (en) * | 2018-05-10 | 2018-12-07 | 特瑞格（天津）科技有限公司 | A kind of plural serial stage multi-chamber lightning protection device for 110kV high voltage transmission line |
| CN210349489U (en) * | 2019-07-24 | 2020-04-17 | 武汉思科力科技有限公司 | Multiple series gap lightning stroke flashover protector |
| CN212257056U (en) * | 2020-05-11 | 2020-12-29 | 国网浙江江山市供电有限公司 | Lightning protection type flashover protector |
-
2020
- 2020-05-11 CN CN202010392649.8A patent/CN111739702B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH117853A (en) * | 1997-06-19 | 1999-01-12 | Tokyo Electric Power Co Inc:The | Current-limiting unit and current-limiting high-tension clamp insulator using it |
| CN201348907Y (en) * | 2009-01-20 | 2009-11-18 | 安徽省电力公司巢湖供电公司 | Lightning protector of 10kV line |
| CN106098264A (en) * | 2016-08-08 | 2016-11-09 | 国网湖南省电力公司 | A kind of 10kV Multifunctional disaster prevention evil insulator and preparation method |
| CN208209240U (en) * | 2018-05-10 | 2018-12-07 | 特瑞格（天津）科技有限公司 | A kind of plural serial stage multi-chamber lightning protection device for 110kV high voltage transmission line |
| CN210349489U (en) * | 2019-07-24 | 2020-04-17 | 武汉思科力科技有限公司 | Multiple series gap lightning stroke flashover protector |
| CN212257056U (en) * | 2020-05-11 | 2020-12-29 | 国网浙江江山市供电有限公司 | Lightning protection type flashover protector |
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| CN111739702B (en) | 2021-08-13 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210125 Address after: No. 256, Luxi North Road, Shuangta street, Jiangshan City, Quzhou City, Zhejiang Province Applicant after: Jiangshan power supply company of State Grid Zhejiang Electric Power Co.,Ltd. Applicant after: JIANGSHAN ELECTRIC POWER DEVELOPMENT Co.,Ltd. Applicant after: WUHAN SIKELI TECHNOLOGY Co.,Ltd. Address before: No. 256, Luxi North Road, Shuangta street, Jiangshan City, Quzhou City, Zhejiang Province Applicant before: STATE GRID ZHEJIANG JIANGSHAN POWER SUPPLY Co.,Ltd. Applicant before: JIANGSHAN ELECTRIC POWER DEVELOPMENT Co.,Ltd. Applicant before: WUHAN SIKELI TECHNOLOGY Co.,Ltd. |
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