CN112072472B

CN112072472B - Arc extinguishing lightning arrester

Info

Publication number: CN112072472B
Application number: CN202010901345.XA
Authority: CN
Inventors: 郭伟; 林楠; 李俊松; 孙浩彬; 纪长城; 刘晓枫; 陈浩林; 颜大涵
Original assignee: Guangdong Power Grid Co Ltd; Shantou Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Shantou Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2022-01-25
Anticipated expiration: 2040-08-31
Also published as: CN112072472A

Abstract

The invention belongs to the field of lightning protection and lightning protection, and discloses an arc-extinguishing lightning-protection device which comprises a connecting mechanism, an arc-extinguishing mechanism, an elastic mechanism, a first connecting rod and a second connecting rod, wherein two ends of the first connecting rod are respectively connected with the top of the connecting mechanism and the top of the arc-extinguishing mechanism, two ends of the second connecting rod are respectively connected with the bottom of the connecting mechanism and the bottom of the elastic mechanism, and the top of the elastic mechanism is connected with the bottom of the arc-extinguishing mechanism. When the insulation protection clearance of device is punctured by electric arc, make the preferential compression hole that gets into of impact arc through the coulomb effect of electrode in the arc extinguishing mechanism, electric arc receives extremely compression effect after receiving the strong constraint of compression hole, the expansion of storage block is violently blown the air current and is followed the direct effect impact arc of compression hole simultaneously, the air current can be accelerated by the little weak point motion of the energy of compelling electric arc, force electric arc heat and electromagnetic energy instantaneous exhaustion, and then effective arc extinguishing, and elastic mechanism can lengthen the electric arc that passes through, reinforcing arc extinguishing effect.

Description

Arc extinguishing lightning arrester

Technical Field

The invention relates to the field of lightning protection and lightning protection, in particular to an arc extinguishing lightning protection device.

Background

The power transmission and distribution line is an important link in a power system, and the guarantee of the safe operation of the power transmission and distribution line is very important, but the normal operation of the power transmission and distribution line is often influenced by lightning, and the number of times of faults such as tripping, breaking and insulator damage caused by lightning is increased continuously, wherein the tripping accidents still account for 60 to 70 percent of the total accident rate of the system and are in a trend of rising year by year.

Aiming at frequent and multiple lightning accidents, the existing lightning arrester mostly adopts parallel gap lightning protection. Although the parallel gap can reduce the lightning trip-out rate and reduce the accident rate, because the parallel gap does not have the arc extinguishing function, the power frequency follow current electric arc can not be effectively extinguished when the lightning flashover occurs, so that the accidents of serious burning loss of the parallel gap metal electrode, wire breakage and the like occur in the actual operation.

Therefore, the lightning arrester with the arc extinguishing function is invented aiming at the gap without the arc extinguishing function, so that the safe operation of the power transmission and distribution line is guaranteed.

Disclosure of Invention

The invention aims to provide an arc extinguishing lightning protection device, which has an effective arc extinguishing effect when the device is subjected to arc impact, can avoid serious burning loss of electrodes and wire breakage, and improves the stability of safe operation of power transmission and distribution lines.

In order to realize the purpose, the following technical scheme is provided:

an arc quenching lightning protection device, comprising:

the connecting mechanism comprises a ground plate, a U-shaped connecting rod, a first clamping plate, a third insulator, a fixed seat, a second clamping plate and a wire clamp, wherein the top of the wire clamp is fixedly connected with the bottom of the fixed seat, the middle of the fixed seat is fixedly connected with the middle of the second clamping plate, the top of the fixed seat is fixedly connected with the bottom of the third insulator, the top of the third insulator is fixedly connected with the bottom of the U-shaped connecting rod, the middle of the U-shaped connecting rod is fixedly connected with the middle of the first clamping plate, and the top of the U-shaped connecting rod is fixedly connected with the bottom of the ground plate;

the arc extinguishing mechanism comprises a first connecting block, a first conductor, a first insulator, a second conductor, a second insulator, a gas storage element, a first electrode, a second electrode, an umbrella skirt, a third conductor, a second connecting block and a fixing piece, wherein the bottom of the first connecting block is fixedly connected with the top of the first insulator, the first insulator is sleeved on the outer side of the first conductor, the bottom of the first insulator is fixedly connected with the top of the second insulator, a compression hole is formed in the center of the second insulator along the vertical direction, the second conductor is arranged in a cavity at the upper part of the compression hole and is attached to the first conductor, the third conductor is arranged in a cavity at the lower part of the compression hole, the first electrode and the second electrode are arranged in the cavity at the middle part of the compression hole at intervals, and the top of the first electrode is fixedly connected with the bottom of the second conductor, the bottom of the second electrode is fixedly connected with the top of the third conductor, the second insulator is provided with the air storage element on the left side of the middle cavity of the compression hole, the top and the bottom of the air storage element are respectively and fixedly connected with the second insulator, the second insulator is provided with an air notch on the right side of the middle cavity of the compression hole, the left side of the umbrella skirt is fixedly connected in the air notch, the bottom of the second insulator is fixedly connected with the top of the second connecting block, and the bottom of the second connecting block is fixedly connected with the top of the fixing piece;

the elastic mechanism comprises a first fixing plate, a first connecting column, a second fixing plate, an elastic sleeve, a limiting ring, a fourth electric conductor, a fixing frame, a telescopic rod, a piston and a threaded column, wherein the top of the first connecting column is fixedly connected with the middle part of the fixing plate, the top of the first fixing plate is fixedly connected with the bottom end of the first connecting column, the bottom of the first fixing plate is fixedly connected with the top end of the elastic sleeve, the top of the elastic sleeve is sleeved outside the fourth electric conductor, the piston is arranged in the elastic sleeve and is arranged at an interval with the fourth electric conductor, the piston is internally connected with the threaded column, the bottom end of the threaded column is fixedly connected with the top end of the telescopic rod, the middle part of the telescopic rod is provided with a limiting groove, the limiting groove is internally connected with the limiting ring, the outer ring of the limiting ring is fixedly connected with the bottom of the fixing frame, and the top of the fixing frame is fixedly connected with the bottom of the elastic sleeve, the bottom end of the telescopic rod is fixedly connected with the top of the second fixing plate;

one end of the first connecting rod is fixedly connected with the right side of the first clamping plate, and the other end of the first connecting rod is fixedly connected with the top of the first connecting block;

and one end of the second connecting rod is fixedly connected with the right side of the second clamping plate, and the other end of the second connecting rod is fixedly connected with the bottom of the second fixing plate.

Further, still include the cable, the cable is fixed in on the fastener.

Furthermore, the third insulator is provided with a plurality of, and a plurality of third insulator from top to bottom distributes in proper order between the U type connecting rod with the fixing base.

Furthermore, the first insulator and the second insulator are integrally formed, the compression hole penetrates through the first insulator, the second insulator and the second connecting block, only the first conductor is arranged in the compression hole of the first insulator and the compression hole of the second connecting block, and the second conductor and the third conductor are arranged in the compression hole of the second insulator.

Furthermore, the second insulator is provided with a plurality of, and a plurality of second insulators distribute in proper order from top to bottom between first insulator and the second connecting block.

Furthermore, the umbrella skirt is provided with a plurality of, a plurality of the umbrella skirt is evenly interval distribution in the air gap.

Further, the top of the first connecting column is provided with threads, and the first connecting column is connected with the middle of the fixing piece through threads.

Furthermore, the elastic sleeves and the telescopic rods are respectively provided with a plurality of elastic sleeves and a plurality of telescopic rods which are respectively and uniformly distributed between the first fixing plate and the second fixing plate around the first connecting column.

Further, the piston is arranged in the elastic sleeve in an interference fit mode.

Furthermore, a threaded hole is formed in the middle of the piston, and the piston is in threaded connection with the threaded column through the threaded hole.

The invention has the beneficial effects that:

in the arc extinguishing lightning protection device, the arc extinguishing mechanism is arranged, so that when the insulation protection gap is impacted and broken down by an electric arc, the compression hole on the second insulator forms a multi-gap structure, the impact electric arc enters the compression holes of the first electrode and the second electrode preferentially through the coulomb force action of the first electrode and the second electrode in the gap, and is subjected to an extreme compression effect after being strongly restrained by the compression holes, and meanwhile, the expanded transverse-blowing airflow provided in the gas storage element directly acts on the impact electric arc along the compression holes. On this basis, elastic mechanism's setting can be when electric arc brings, and the heat that produces through electric arc heats the inflation to the air in the elastic sleeve, and rethread piston effect for expanding air pushes out the elastic sleeve with the telescopic link, elongates the electric arc that passes through, further strengthens the arc extinguishing effect of the device.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and 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 contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a front view of an arc extinguishing lightning protection device according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of the connection mechanism of FIG. 1 according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an arc extinguishing mechanism in fig. 1 according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of the elastic mechanism of FIG. 1 according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a portion of the structure of FIG. 4 according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an arc extinguishing mechanism according to an embodiment of the present invention;

fig. 7 is an oscillogram of different numbers (m) of arc extinguishing channels according to an embodiment of the present invention.

In the figure:

1. a connecting mechanism; 11. a ground plate; 12. a U-shaped connecting rod; 13. a first splint; 14. a third insulator; 15. a fixed seat; 16. a second splint; 17. wire clamps;

2. an arc extinguishing mechanism; 21. a first connection block; 22. a first electrical conductor; 221. a first insulator; 23. a second electrical conductor; 231. a compression hole; 232. a second insulator; 233. a gas storage element; 234. a first electrode; 235. a second electrode; 236. an air gap; 237. an umbrella skirt; 238. a third electrical conductor; 24. a second connecting block; 25. a fixing sheet;

3. an elastic mechanism; 31. a first fixing plate; 32. a first connecting column; 33. a second fixing plate; 34. an elastic sleeve; 341. a limiting ring; 342. a fourth electrical conductor; 343. a fixed mount; 35. a telescopic rod; 351. a limiting groove; 352. a piston; 353. a threaded post;

4. a first connecting rod;

5. a second connecting rod;

6. a cable.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when the product is used, and are only for convenience of description of the present invention, and do not indicate or imply that the referred device or element 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. Furthermore, the terms "first", "second", and the like are used for descriptive purposes only or to distinguish between different structures or components and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical scheme of the invention is further illustrated by the specific implementation mode in the attached drawings.

The first embodiment is as follows:

referring to fig. 1 to 5, the present embodiment provides an arc-extinguishing lightning protection device, which includes a connecting mechanism 1, an arc-extinguishing mechanism 2, an elastic mechanism 3, a first connecting rod 4 and a second connecting rod 5, wherein the connecting mechanism 1 includes a ground plate 11, a U-shaped connecting rod 12, a first clamp 13, a third insulator 14, a fixing base 15, a second clamp 16 and a wire clamp 17, a top of the wire clamp 17 is fixedly connected to a bottom of the fixing base 15, a middle of the fixing base 15 is fixedly connected to a middle of the second clamp 16, a top of the fixing base 15 is fixedly connected to a bottom of the third insulator 14, a top of the third insulator 14 is connected to a bottom of the U-shaped connecting rod 12 through a bolt, a middle of the U-shaped connecting rod 12 is fixedly connected to a middle of the first clamp 13, a top of the U-shaped connecting rod 12 is connected to a bottom of the ground plate 11 through a U-shaped clamping connector and a bolt, the arc-extinguishing mechanism 2 includes a first connecting block 21, a first conductor 22, a first insulator 221, The second conductor 23, the second insulator 232, the gas storage component 233, the first electrode 234, the second electrode 235, the umbrella skirt 237, the third conductor 238, the second connection block 24 and the fixing plate 25, the bottom of the first connection block 21 is fixedly connected with the top of the first insulator 221, the first insulator 221 is sleeved outside the first conductor 22, the bottom of the first insulator 221 is fixedly connected with the top of the second insulator 232, the center of the second insulator 232 is provided with a compression hole 231 along the vertical direction, the second conductor 23 is arranged in the upper cavity of the compression hole 231, the second conductor 23 is attached to the first conductor 22, the third conductor 238 is arranged in the lower cavity of the compression hole 231, the first electrode 234 and the second electrode 235 are arranged in the middle cavity of the compression hole 231 at intervals, the top of the first electrode 234 is fixedly connected with the bottom of the second conductor 23, the bottom of the second electrode 235 is fixedly connected with the top of the third conductor 238, the second insulator 232 is provided with an air storage element 233 at the left side of the middle cavity of the compression hole 231, the top and the bottom of the air storage element 233 are respectively and fixedly connected with the second insulator 232, the second insulator 232 is provided with an air gap 236 at the right side of the middle cavity of the compression hole 231, the air gap 236 is internally and fixedly connected with the left side of the umbrella skirt 237, the bottom of the second insulator 232 is fixedly connected with the top of the second connecting block 24, the bottom of the second connecting block 24 is fixedly connected with the top of the fixing piece 25, the elastic mechanism 3 comprises a first fixing plate 31, a first connecting column 32, a second fixing plate 33, an elastic sleeve 34, a spacing ring 341, a fourth conductor 342, a fixing frame 343, an expansion rod 35, a piston 352 and a threaded column 353, the top of the first connecting column 32 is fixedly connected with the middle part of the fixing piece 25, the top of the first fixing plate 31 is fixed at the bottom of the first connecting column 32 by welding, the bottom of the first fixing plate 31 is fixedly connected with the top of the elastic sleeve 34, the outside of fourth electric conductor 342 is located to the top cover of elastic sleeve 34, be equipped with piston 352 in the elastic sleeve 34, piston 352 sets up with fourth electric conductor 342 interval, piston 352 internal connection screw thread post 353, screw thread post 353 bottom fixed connection telescopic link 35 top, spacing groove 351 has been seted up at the telescopic link 35 middle part, spacing inslot 351 endotheca spacing ring 341, spacing ring 341 outer lane fixed connection mount 343 bottom, mount 343 top fixed connection elastic sleeve 34 bottom, telescopic link 35 bottom fixed connection second fixed plate 33 top, the one end fixed connection first splint 13 right side of head rod 4, the bolted connection first connecting block 21 top of the other end of head rod 4, the 16 right sides of 5 one end fixed connection second splint of second connecting rod, the other end welded fastening of second connecting rod 5 is in second fixed plate 33 bottom.

By arranging the arc extinguishing mechanism 2, when the insulation protection gap is broken down by the impact of the electric arc, the impact electric arc enters the compression hole 231 preferentially through the coulomb force action of the first electrode 234 and the second electrode 235, and is subjected to the extreme compression effect after being strongly restrained by the compression hole 231, meanwhile, the expansion transverse-blowing air flow in the air storage element 233 directly acts on the impact electric arc along the compression hole 231, the transverse-blowing air flow with certain pressure and speed can be accelerated by the energy weak point movement of the forced electric arc, so that the heat and the electromagnetic energy of the transverse-blowing air flow are dissipated to the maximum instantly, and the effective arc extinguishing effect is achieved, on the basis, the arrangement of the elastic mechanism 3 can heat and expand the air in the elastic sleeve 34 through the heat generated by the electric arc when the electric arc is brought, and then the expansion air pushes the expansion rod 35 out of the elastic sleeve 34 through the action of the piston 352, so as to elongate the passing electric arc, further improve the quality of arc extinguishing.

In particular, the fixed connection between the structures in the above embodiments is basically welding, which ensures the structural integrity of the arc extinguishing lightning protection device and good electrical contact characteristics between the structures.

More specifically, the electrode materials of the first electrode 234 and the second electrode 235 may be selected from graphite and metal, and the electrode materials of the first electrode 234 and the second electrode 235 may be provided as the same kind of electrode material or different kinds of electrode materials.

Referring to fig. 1 and 2, in the present embodiment, a cable 6 is further included, and the cable 6 is fixed to the clip 17. Above-mentioned setting is fixed 6 with the cable through the fastener, guarantees that 6 can not break away from because of great pulling force effects of cable, has guaranteed good electrical contact characteristic simultaneously.

Specifically, the cable 6 is fastened on the wire clamp 17 through the clamping piece and the nut, and the wire clamp 17 is made of iron or aluminum metal accessories.

Referring to fig. 2, in the present embodiment, a plurality of third insulators 14 are provided, and are sequentially distributed between the U-shaped connecting rod 12 and the fixing base 15 from top to bottom. The working voltage of the arc extinguishing lightning arrester and the arrangement of the arc extinguishing mechanism 2 are matched, and the arrangement improves the structure of the arc extinguishing lightning arrester and the stability of the arc extinguishing effect.

Referring to fig. 3, in the present embodiment, the first insulator 221 and the second insulator 232 are integrally formed, the compression hole 231 penetrates through the first insulator 221, the second insulator 232, and the second connection block 24, only the first conductor 22 is disposed in the compression hole 231 of the first insulator 221 and the second connection block 24, and the second conductor 23 and the third conductor 238 are disposed in the compression hole 231 of the second insulator 232. Above-mentioned setting has saved the inter-insulator connection process flow, and compression hole 231 forms many clearance structures in arc extinguishing mechanism 2, and the conductor is evenly arranged to different positions, has effectively strengthened many clearance arc extinguishing effect.

In this embodiment, the shed 237 is provided with a plurality of sheds, which are evenly spaced in the air gaps 237 of the second insulator 232. The arrangement prevents the arc extinguishing mechanism from being influenced by weather and electric corrosion and provides required creepage distance.

Specifically, four sheds 237 are disposed at the air gap of each second insulator 232, and the sheds are made of silicon rubber.

Referring to fig. 4, in the present embodiment, the top of the first connection post 32 is provided with a screw, and the first connection post 32 is connected to the middle of the fixing plate 25 by the screw. Above-mentioned setting for fastening connection between arc extinguishing mechanism 2 and the elastic mechanism 3, during the arc impact, when the arc extinguishing mechanism 2 transversely blows the arc extinguishing through many clearances, also lengthen electric arc in elastic mechanism 3, fastening connection has guaranteed to suffer electric arc when assaulting, the structural strength of arc extinguishing mechanism 2 and elastic mechanism 3.

In this embodiment, the elastic sheath 34 and the telescopic rod 35 are respectively provided in a plurality, and are uniformly distributed between the first fixing plate 31 and the second fixing plate 33 around the first connecting column 32. By the arrangement, when the electric arc passes through, the elastic mechanism 2 provides enough space for elongating the electric arc through the movement of the elastic sleeve and the telescopic rod, so that a good arc extinguishing effect is achieved.

Specifically, the elastic sleeves 34 and the telescopic rods 35 are respectively provided with four ones, and are distributed between the first fixing plate 31 and the second fixing plate 33 in a rectangular shape.

Referring to fig. 5, in this embodiment, the piston 352 is interference fit within the elastomeric sleeve 34. The above arrangement causes the piston 352 to generate elastic pressure on the surface thereof, so that a tight connection is obtained between the piston 352 and the elastic sleeve 34, the piston 352 is prevented from moving freely in the elastic sleeve 34, when an electric arc is brought, air in the elastic sleeve 34 is heated and expanded by heat generated by the electric arc, and the telescopic rod is pushed out of the elastic sleeve 34 by the movement of the piston 352, so that the passing electric arc is elongated.

In this embodiment, a threaded hole is opened in the middle of the piston 352, and the piston 352 is screwed with the threaded post 353 through the threaded hole. Above-mentioned setting for the limited space utilization of the air in the elastic sleeve 34 is higher, and the heating expansion effect that produces the air when electric arc brings is more stable, and then has guaranteed elastic mechanism 3 to the elongated reliability of electric arc.

Example two:

the second embodiment discloses an arc extinguishing lightning protection device, and the structure of the arc extinguishing lightning protection device is basically the same as that of the first embodiment. The arc extinguishing lightning protection device comprises a connecting mechanism 1, an arc extinguishing mechanism 2, an elastic mechanism 3, a first connecting rod 4, a second connecting rod 5 and a cable 6, and the specific structure and the connecting mode of the structure are the same as those in the first embodiment.

Referring to fig. 3 and 6, the present embodiment is different from the first embodiment in that: the second insulator 232 of the arc extinguishing mechanism 2 is provided in plurality, and is distributed between the first insulator 221 and the second connecting block 24 from top to bottom. Meanwhile, the vertical length of the second insulator 232 can be increased or decreased, and the number of the third insulators 14 in the corresponding connecting mechanism 1 and the number of the umbrella skirts 237 arranged on the second insulator 232 are also changed in a matching manner.

Specifically, referring to fig. 3, seven second insulators 232 are provided, and referring to fig. 6, two second insulators 232 are provided, and each second insulator 232 is provided therein with one second conductor 23, one third conductor 238, one first electrode 234, one second electrode 235, and one gas storage element 233. When the vertical length of the second insulator 232 is changed, the number of the sheds 237 is correspondingly adjusted according to the difference of the vertical length of the second insulator 232, so that the space between the sheds 237 is 17mm-23 mm.

The quantity and the vertical length size of second insulator 232 can all be decided according to the actual demand, set up different quantity and concrete length size according to power frequency discharge voltage and arc extinguishing voltage, optimize many clearance arc extinguishing lightning arrester's arc extinguishing mechanism, guarantee the reliability of arc extinguishing effect.

The structure and the connection mode of the arc extinguishing lightning protection device are explained in detail above, and in order to facilitate understanding of the effect of the multi-gap transverse-blowing arc extinguishing lightning protection technology, lightning waveforms are tested by setting different numbers (m) of arc extinguishing channels. Fig. 7 is an oscillogram of the various numbers (m) of arc extinguishing channels obtained in the experiment, and the suppression effect of the device on the arc is reflected by the change of the arc voltage in different time periods.

Specifically, in fig. 7, the abscissa represents the time (T) in microseconds (μ s) that the device is subjected to an arc strike, and the ordinate represents the voltage (U) in kilovolts (kV), where the curve a corresponds to m 40, the curve b corresponds to m 30, and the curve c corresponds to m 20. It can be seen from the figure that no matter whether the arc is quenched by impact or zero, the voltage is not reduced to zero, and a large residual voltage exists. The arc generates a violent voltage drop at about 30 mu s, which is completely different from a standard lightning waveform, the arc voltage drops suddenly in the process of developing to a peak, reaches a trough at about 40us, keeps the trough state, then rises slowly, rises suddenly within 85 mu s-105 mu s to reach a second wave peak, and then gradually decreases. But the second secondary wave crest is much lower than the first secondary wave crest and the standard wave crest of the lightning, which shows that the arc extinguishing structure of the device has strong inhibiting effect on the electric arc, the energy supply is interrupted in the energy rising process, and the damage of the developed complete electric arc to the insulating equipment is avoided. In addition, as the number (m) of the arc extinguishing channels is increased from 20 to 30 and 40, the voltage drop of the curve a in fig. 7 is larger, and the peak is lower, which shows that as the number of the gaps is increased, the arc extinguishing effect is better, and under the condition that the same voltage level and the path of the arc track are ensured to pass according to the design requirement, the arc suppression effect is better as the gaps are increased.

Furthermore, it is seen from the experimental data in fig. 7 that the rapid expansion of the gas flow in the early 40 μ s acts on the arc, producing a strong suppression thereof such that a sudden decay of the arc voltage waveform to a trough occurs in the rising phase, which is consistent with the single arc-quenching channel energy simulation curve. The collective characteristic of multiple arc extinguishing channels is basically consistent with the arc extinguishing characteristic of a single channel, so that the arc suppression effect is better when the number of gaps is larger and the arc extinguishing characteristic is unchanged.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An arc quenching lightning protection device, comprising:

the connecting mechanism (1) comprises a ground plate (11), a U-shaped connecting rod (12), a first clamping plate (13), a third insulator (14), a fixed seat (15), a second clamping plate (16) and a wire clamp (17), wherein the top of the wire clamp (17) is fixedly connected with the bottom of the fixed seat (15), the middle of the fixed seat (15) is fixedly connected with the middle of the second clamping plate (16), the top of the fixed seat (15) is fixedly connected with the bottom of the third insulator (14), the top of the third insulator (14) is fixedly connected with the bottom of the U-shaped connecting rod (12), the middle of the U-shaped connecting rod (12) is fixedly connected with the middle of the first clamping plate (13), and the top of the U-shaped connecting rod (12) is fixedly connected with the bottom of the ground plate (11);

the arc extinguishing mechanism (2) comprises a first connecting block (21), a first conductor (22), a first insulator (221), a second conductor (23), a second insulator (232), a gas storage element (233), a first electrode (234), a second electrode (235), an umbrella skirt (237), a third conductor (238), a second connecting block (24) and a fixing piece (25), wherein the bottom of the first connecting block (21) is fixedly connected with the top of the first insulator (221), the first insulator (221) is sleeved on the outer side of the first conductor (22), the bottom of the first insulator (221) is fixedly connected with the top of the second insulator (232), a compression hole (231) is formed in the center of the second insulator (232) along the vertical direction, the second conductor (23) is arranged in an upper cavity of the compression hole (231), and the second conductor (23) is attached to the first conductor (22), the third conductor (238) is arranged in a cavity at the lower part of the compression hole (231), the first electrode (234) and the second electrode (235) are arranged in the cavity at the middle part of the compression hole (231) at intervals, the top of the first electrode (234) is fixedly connected with the bottom of the second conductor (23), the bottom of the second electrode (235) is fixedly connected with the top of the third conductor (238), the second insulator (232) is provided with the gas storage element (233) at the left side of the cavity at the middle part of the compression hole (231), the top and the bottom of the gas storage element (233) are respectively and fixedly connected with the second insulator (232), the right side of the cavity at the middle part of the compression hole (231) of the second insulator (232) is provided with an air gap (236), the air gap (236) is fixedly connected with the left side of the umbrella skirt (237), and the bottom of the second insulator (232) is fixedly connected with the top of the second connecting block (24), the bottom of the second connecting block (24) is fixedly connected with the top of the fixing plate (25);

the elastic mechanism (3) comprises a first fixing plate (31), a first connecting column (32), a second fixing plate (33), an elastic sleeve (34), a limiting ring (341), a fourth conductor (342), a fixing frame (343), an expansion link (35), a piston (352) and a threaded column (353), wherein the top of the first connecting column (32) is fixedly connected with the middle part of the fixing plate (25), the top of the first fixing plate (31) is fixedly connected with the bottom end of the first connecting column (32), the bottom of the first fixing plate (31) is fixedly connected with the top end of the elastic sleeve (34), the top of the elastic sleeve (34) is sleeved on the outer side of the fourth conductor (342), the piston (352) is arranged in the elastic sleeve (34), the piston (352) and the fourth conductor (342) are arranged at intervals, and the piston (352) is internally connected with the threaded column (353), the bottom end of the threaded column (353) is fixedly connected with the top end of the telescopic rod (35), a limiting groove (351) is formed in the middle of the telescopic rod (35), the limiting ring (341) is sleeved in the limiting groove (351), the outer ring of the limiting ring (341) is fixedly connected with the bottom of the fixing frame (343), the top of the fixing frame (343) is fixedly connected with the bottom of the elastic sleeve (34), and the bottom end of the telescopic rod (35) is fixedly connected with the top of the second fixing plate (33);

one end of the first connecting rod (4) is fixedly connected with the right side of the first clamping plate (13), and the other end of the first connecting rod (4) is fixedly connected with the top of the first connecting block (21);

the second connecting rod (5), second connecting rod (5) one end fixed connection the second splint (16) right side, second connecting rod (5) other end fixed connection second fixed plate (33) bottom.

2. An arc extinction and lightning protection device according to claim 1, characterized in that it further comprises a cable (6), the cable (6) being fixed to the wire clamp (17).

3. An arc-extinguishing lightning conductor according to claim 1, characterized in that the third insulator (14) is provided in plurality, and the plurality of third insulators (14) are distributed between the U-shaped connecting rod (12) and the fixed base (15) from top to bottom.

4. An arc-quenching lightning protection device according to claim 1, characterized in that the first insulator (221) and the second insulator (232) are integrally formed, the compression hole (231) penetrates through the first insulator (221), the second insulator (232) and the second connecting block (24), only the first conductor (22) is arranged in the compression hole (231) of the first insulator (221) and the second connecting block (24), and the second conductor (23) and the third conductor (238) are arranged in the compression hole (231) of the second insulator (232).

5. An arc-extinguishing lightning conductor according to claim 4, characterized in that the second insulator (232) is provided in plurality, and the second insulators (232) are distributed between the first insulator (221) and the second connecting block (24) from top to bottom.

6. An arc extinction and lightning protection device according to claim 1, characterized in that the shed (237) is provided in plurality, and the sheds (237) are evenly spaced in the air gap (236).

7. An arc-extinguishing lightning protection device according to claim 1, characterized in that the top of the first connecting post (32) is provided with a screw thread, and the first connecting post (32) is connected with the middle of the fixing plate (25) through the screw thread.

8. An arc-quenching lightning protection device according to claim 1, characterized in that said elastic sleeve (34) and said telescopic rod (35) are respectively provided in plurality, said elastic sleeve (34) and said telescopic rod (35) being respectively uniformly distributed around said first connecting column (32) between said first fixing plate (31) and said second fixing plate (33).

9. An arc quenching lightning conductor according to claim 8, characterized in that said piston (352) is interference-fitted in said elastic sleeve (34).

10. An arc-extinguishing lightning protection device according to claim 1, characterized in that the piston (352) is provided with a threaded hole in the middle, and the piston (352) is screwed with the threaded post (353) through the threaded hole.