CN114361947A

CN114361947A - Power line carrier lightning protection device

Info

Publication number: CN114361947A
Application number: CN202111471207.3A
Authority: CN
Inventors: 李孝清
Original assignee: Hunan Huizhuo Electric Power Technology Co ltd
Current assignee: Hunan Huizhuo Electric Power Technology Co ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-04-15
Anticipated expiration: 2041-12-03
Also published as: CN114361947B

Abstract

The invention discloses a power carrier lightning protection device, which comprises an inductance element, an overload circuit breaker, a mounting rack, a blocker and more than one lightning rod, wherein the mounting rack is detachably fixed on a telegraph pole and used for mounting the overload circuit breaker, the blocker and the more than one lightning rod; the blocking device is also electrically connected to a ground wire for breaking an electrical connection with the overload breaker when the lightning rod is in contact with lightning and transmits a high current to the blocking device so that the high current is transmitted to the ground through the ground wire. The lightning protection device has the advantages of simple and compact structure, good lightning protection effect and high safety.

Description

Power line carrier lightning protection device

Technical Field

The invention mainly relates to the field of power carrier lightning protection devices, in particular to a power carrier lightning protection device.

Background

The electrical carrier communication is power system communication in which a transmission line is used as a transmission medium of a carrier signal. Because the transmission line has a very firm supporting structure and is provided with more than 3 conductors (generally comprising three-phase good conductors and one or two overhead ground wires), the transmission line is used for transmitting carrier signals while transmitting power frequency current, and is economical and very reliable. This comprehensive utilization has long been the preferred communication means for the power sector in the world.

At present, the lightning protection of high-voltage power devices and power communication systems is compatible and uses various lightning protection devices without advantages, and the silicon carbide lightning arrester is mainly used in practical use. The protection mode is that a clearance or a tubular arrester and a valve arrester are protected in the system and used together, the technical level only focuses on lightning amplitude voltage limiting protection, and the defects of incomplete lightning protection function, incomplete protection performance and the like exist; and lightning has strong interference to carrier communication frequency, and the development of the carrier communication technology is seriously limited.

Therefore, how to invent a power carrier lightning protection device with good lightning protection effect and high safety so as to arrange a lightning rod for attracting lightning in a local area to enable the lightning to fall on a designated area to avoid the influence on carrier communication becomes a problem to be solved urgently.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide the power carrier lightning protection device which has the advantages of simple and compact structure, good lightning protection effect and high safety and can enable lightning to discharge in a specified area so as to reduce the influence of the lightning on power carrier communication.

In order to solve the technical problems, the invention adopts the following technical scheme:

a power carrier lightning protection device comprises an inductance element, an overload circuit breaker, a mounting frame, a blocker and more than one lightning rod, wherein the mounting frame is detachably fixed on a telegraph pole and used for mounting the overload circuit breaker, the blocker and the more than one lightning rod; the blocking device is also electrically connected to a ground wire for breaking an electrical connection with the overload breaker when the lightning rod is in contact with lightning and transmits a high current to the blocking device so that the high current is transmitted to the ground through the ground wire.

As a further improvement of the invention, the blocker comprises a mounting seat, a spring, an insulating flange ring, a movable disc and a water carrying platform; the middle part of the mounting seat is vertically provided with a first guide rod, and the movable disc, the insulating flange ring and the spring are sequentially and movably sleeved on the first guide rod from top to bottom; the mounting seat is provided with a contact seat used for being electrically connected with a lightning rod, and the bottom of the movable disc is provided with a downward convex contact used for being electrically connected with an overload circuit breaker; the water carrying platform is fixed above the movable disc through the connecting piece, and when the water carrying platform bears rainwater and presses the movable disc downwards in rainy days, the contact is in contact with the contact seat and is used for leading weak current out of the power transmission line to be transmitted to the lightning rod so as to attract thunder and lightning; but the impeller of jack-up still is installed to the below of insulating flange ring on the mount pad, the impeller is connected with lightning rod, earth connection electricity respectively, when lightning rod and thunder and lightning contact and transmit the strong current to the impeller, the impeller jack-up insulating flange ring up so that the contact breaks away from the contact seat and makes the strong current transmit to ground through the earth connection.

As a further improvement of the invention, the pusher comprises an installation underframe, an annular permanent magnet, an electromagnetic ring and a pressure plate for jacking up an insulating flange ring, wherein a second guide rod is vertically installed in the middle of the installation underframe, the pressure plate, the electromagnetic ring and the annular permanent magnet are sequentially sleeved on the second guide rod from top to bottom, a circle of contact piece is arranged on the installation underframe and outside the annular permanent magnet and used for being electrically connected with a grounding wire, a circle of contact ring is arranged on the outer circumferential surface of the pressure plate and used for being electrically connected with a lightning rod, when the pressure plate is not jacked up, the contact ring is in contact with the contact piece, the electromagnetic ring is fixed on the bottom of the pressure plate and is respectively electrically connected with the lightning rod and the grounding wire and used for pushing a birth electromagnetic field to jack up the pressure plate when the pressure plate is contacted with lightning current.

As a further improvement of the invention, the mounting rack is also provided with an outer shell, the blocker is arranged in the outer shell, and a top plate of the outer shell is provided with a water inlet corresponding to the position of the water carrying platform.

As a further improvement of the invention, the lightning arrester also comprises an indicator light, and the switch circuit of the indicator light is respectively electrically connected with the contact and the contact base and is used for flashing the indicator light to send out an alarm signal when the contact and the contact base are contacted for lightning strike.

As a further improvement of the invention, the bottom plate of the water carrying platform is provided with small drainage holes which are communicated with the outside through branch drainage pipes so as to slowly drain rainwater in the water carrying platform.

As a further improvement of the invention, the side wall of the water carrying platform and the position close to the top surface are provided with overflow ports, the overflow ports are communicated with the outside through overflow guide pipes, and the bottom ends of the drainage branch pipes are communicated with the overflow guide pipes.

As a further improvement of the invention, the contact piece comprises a circle of outer ring vertically fixed on the mounting underframe, a circle of inward inclined guide cone sheets are fixed on the inner side surface of the outer ring, and the guide cone sheets are metal thin sheets.

As a further improvement of the invention, the outer side surface of the contact ring is a metal surface, and the diameter of the outer ring of the contact ring is smaller than that of the inner ring of the outer ring and larger than that of the inner ring of the guide cone.

As a further improvement of the invention, the inductance part comprises an insulation hanger and a mutual inductance coil group arranged in the insulation hanger, the insulation hanger is provided with a hook for being hung on a power transmission line, and the inner side of the hook is provided with an exposed metal sheet; the mutual inductance coil group comprises a main coil and a secondary coil which are mutually matched, the main coil is electrically connected with the metal sheet, and the secondary coil is electrically connected with the overload circuit breaker.

Compared with the prior art, the invention has the advantages that:

the power carrier lightning protection device has the advantages that through the special structural design, the structure is simple and compact, the installation is convenient and rapid, weak current on the power transmission line can be used for being led out and transmitted to the lightning rod to attract lightning to generate point discharge, the lightning is attracted, the lightning can be discharged in a specified area, and the influence on power carrier communication is reduced.

The power carrier lightning protection device is also provided with a special blocker, so that the strong current attracted by the lightning rod can be transmitted to the ground only through the grounding wire electrically connected with the blocker, the power transmission line and other parts cannot be damaged by lightning stroke, the safety is extremely high, meanwhile, the carrier communication frequency cannot be strongly interfered by lightning, and the good operation of the carrier communication technology is greatly promoted.

Thirdly, the power carrier lightning protection device of the invention is designed with a special blocker, which can not lead the lightning rod to carry weak current in non-rainy days, thus having high safety; and once raining, carry the water platform and can utilize rainwater automatic decline and make the weak conductance on the power transmission line transmit the lightning rod and attract the thunder and lightning to take place point discharge. And once the rain stops, the water carrying platform can automatically rise to ensure that the lightning rod is not discharged with weak current any more, and the safety is extremely high. Namely, the blocker plays a role of starting discharge lightning protection according to the automatic switch adjustment of the natural environment.

And fourthly, the power carrier lightning protection device enables the indicator light to flash to send out an alarm signal when lightning is induced by arranging the indicator light. The indicating lamp can flash, prompts passers-by, vehicles and the like, keeps away from the lightning guiding device as far as possible, and greatly improves safety.

The power carrier lightning protection device has the advantages that the drainage small holes are formed in the bottom plate of the water carrying platform, when the lightning stops, water in the water carrying platform can only be discharged outwards and slowly from the small-diameter drainage branch pipes through the drainage small holes, the drainage speed is low, the water in the water carrying platform can be discharged completely after a period of time is delayed, and the weak current output by the inductance part can be disconnected from the lightning rod.

Sixthly, the power carrier lightning protection device is provided with the inductance element with a special structure, the hook of the inductance element can be hung on a power transmission line, the exposed metal sheet is communicated with the power transmission line, the main coil is electrified, weak current is supplied to the lightning rod by utilizing the mutual inductance between the main coil and the secondary coil, and the power carrier lightning protection device is simple and light in structure and high in practicability.

Drawings

Fig. 1 is a schematic structural diagram of a power carrier lightning protection device according to the present invention.

Fig. 2 is a schematic diagram of a schematic top view structure of the power carrier lightning protection device of the present invention.

Fig. 3 is a schematic front view of the inductor of the present invention.

FIG. 4 is a schematic diagram of the front view of the occluder of the present invention.

Fig. 5 is a front view schematically illustrating the construction of the pusher according to the present invention.

Fig. 6 is a schematic circuit diagram of the power carrier lightning protection device according to the present invention.

The reference numerals in the figures denote:

1. a utility pole; 11. a power transmission line; 2. an inductance element; 21. an insulating hanger; 211. hooking; 212. a metal sheet; 22. a mutual inductance coil group; 221. a main coil; 222. a secondary coil; 3. an overload circuit breaker; 4. a mounting frame; 5. an outer housing; 51. a water inlet; 6. a lightning rod; 7. a blocker; 71. a mounting seat; 711. a contact base; 72. a spring; 73. a first guide bar; 74. a pusher; 741. installing a bottom frame; 742. an annular permanent magnet; 743. an electromagnetic coil; 744. a second guide bar; 745. a platen; 746. a contact piece; 7461. an outer ring; 7462. a guide conical sheet; 747. a contact ring; 75. an insulating flange ring; 76. a movable tray; 761. a contact; 77. a water carrying platform; 771. a drain branch pipe; 772. an overflow conduit; 8. fixing the buckle device; 9. and a ground line.

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples.

As shown in fig. 1 to 6, the present invention provides a power carrier lightning protection device, which includes an inductor 2, an overload circuit breaker 3, a mounting bracket 4, a blocker 7 and more than one lightning rod 6, wherein the mounting bracket 4 is detachably fixed on a utility pole 1 for mounting the overload circuit breaker 3, the blocker 7 and the more than one lightning rod 6, the inductor 2, the overload circuit breaker 3, the blocker 7 and the lightning rod 6 are sequentially and electrically connected in series, and the inductor 2 is mounted on a power transmission line 11 for leading out weak current from the power transmission line 11 and transmitting the weak current to the lightning rod 6 to attract lightning; the interrupter 7 is also electrically connected to a ground wire 9 for breaking the electrical connection to the overload breaker 3 when the lightning rod 6 is in contact with lightning and transmits a high current to the interrupter 7 so that the high current is transmitted to the ground through the ground wire 9. The specific implementation principle is as follows:

in this embodiment, the mounting frame 4 is configured in a ring shape, and is disposed on the upper end of the utility pole 1, and then fixed by fastening nails, and the ground wire 9 is fixed on the side of the utility pole 1 by a plurality of fixing and fastening devices 8. In rainy days, the electric sensing element 2 arranged on the electric power transmission line 11 derives weak current from the electric power transmission line 1 by using an electric sensing principle, the weak current is reduced in voltage and is finally transmitted to the lightning rod 6, the weak current carried by the lightning rod 6 can attract lightning to generate point discharge and attract lightning, the lightning can also be caused to generate a discharge phenomenon in a specified area as much as possible, and the influence on power carrier communication is reduced.

When the lightning is in contact with the tip of the lightning rod 6, the lightning firstly transmits a strong current to the blocker 7 through the lightning rod, and at the moment, the blocker 7 is electrically disconnected from the overload breaker 3, namely, the blocker 7 can lead the inductor 2 out to the weak current disconnection of the lightning rod 6. So that the high current can only be transmitted to ground through the earth 9 electrically connected to the interrupter 7. Namely, the excellent discharge effect is formed, and the safety is extremely high.

Through the special scientific design, the method has the following technical advantages:

firstly, the power carrier lightning protection device has a simple and compact structure and is convenient and quick to install through a special structural design, weak current on the power transmission line 11 can be used for guiding out and transmitting the weak current to the lightning rod 6 to attract lightning to generate point discharge and attract lightning, the lightning can also be caused to generate a discharge phenomenon in a specified area, and the influence on power carrier communication is reduced.

Secondly, the power carrier lightning protection device is also provided with a special blocker 7, so that the strong current attracted by the lightning rod 6 can only be transmitted to the ground through a grounding wire electrically connected with the blocker 7, the power transmission line and other parts cannot be damaged by lightning stroke, the safety is extremely high, meanwhile, the strong interference on the carrier communication frequency cannot be caused by lightning, and the good operation of the carrier communication technology is greatly promoted.

Further, in the preferred embodiment, blocker 7 includes a mounting seat 71, a spring 72, an insulating flange ring 75, a movable disk 76, and a water-carrying platform 77; a first guide rod 73 is vertically arranged in the middle of the mounting seat 71, and the movable disc 76, the insulating flange ring 75 and the spring 72 are sequentially movably sleeved on the first guide rod 73 from top to bottom; the mounting seat 71 is provided with a contact seat 711 for electrically connecting with the lightning rod 6, and the bottom of the movable disc 76 is provided with a downward-protruding contact 761 for electrically connecting with the overload circuit breaker 3; the water carrying platform 77 is fixed above the movable disc 76 through a connecting piece, and when the water carrying platform 77 receives rainwater and presses the movable disc 76 downwards in rainy days, the contact 761 is in contact with the contact seat 711 for leading weak current out of the power transmission line 11 to be transmitted to the lightning rod 6 to attract lightning; a pusher 74 which can be lifted up is further installed on the mounting seat 71 below the insulating flange ring 75, the pusher 74 is electrically connected to the lightning rod 6 and the ground wire 9, respectively, and when the lightning rod 6 is in contact with lightning and transmits a high current to the pusher 74, the pusher 74 lifts up the insulating flange ring 75 upward to separate the contact 761 from the contact seat 711 and transmit the high current to the ground through the ground wire 9.

The specific implementation principle is as follows:

in non-rainy days, the spring 72 pushes up the upper movable plate 76, the insulating flange ring 75, and the water platform 77 together, so that the contact 761 and the contact seat 711 do not contact each other. When the rain falls, the water carrying platform 77 receives rainwater, so that the water carrying platform 77 becomes heavy and presses the movable disc 76 downwards, and the contact 761 is in contact with the contact seat 711; so that the contact 761 can lead out and transmit the weak current on the power transmission line to the contact seat 711, and then transmit the weak current to the lightning rod 6 through the contact seat 711, and the weak current carried by the lightning rod 6 can attract the lightning to generate point discharge.

When the lightning contacts the tip of the lightning rod 6, the lightning firstly transmits a high current to the pusher 74 through the lightning rod 6, and the pusher 74 pushes up the insulating flange ring 75 upward and synchronously pushes up the movable disk 76 and the water carrying platform 77 above through the insulating flange ring 75. The lifting of the movable plate 76 separates the contact 761 from the contact seat 711, and the strong current can be transmitted to the ground only through the ground wire 9 electrically connected to the pusher 74, which provides an excellent discharging effect and high safety.

When the thunderstorm weather is over, the rainwater in the water carrying platform 77 runs off (in a mode described below) or evaporates, the weight of the water carrying platform 77 is reduced, and the spring 72 can jack up the movable disc 76, the insulating flange ring 75 and the water carrying platform 77 above together, so that the contact 761 and the contact seat 711 are not contacted, and the lightning rod 6 is not weakened.

Through the special scientific design, the method has the following technical advantages: according to the power carrier lightning protection device, the special blocker 7 is designed, so that the lightning rod 6 is not subjected to weak current in non-rainy days, and the safety is high; when it rains, the water platform 77 automatically descends by the rain water and transmits weak electric conduction on the power transmission line 11 to the lightning rod 6 to attract the lightning to generate the point discharge. Once the rain stops, the water carrying platform 77 can automatically rise to ensure that the lightning rod 6 is not discharged with weak current any more, and the safety is extremely high. That is, the interrupter 7 plays a role of starting discharging lightning protection according to the automatic switch adjustment of the natural environment.

Further, in the preferred embodiment, the pusher 74 includes a mounting chassis 741, an annular permanent magnet 742, an electromagnetic coil 743 and a platen 745 for lifting up the insulating flange ring 75, a second guiding rod 744 is vertically mounted in the middle of the mounting chassis 741, the platen 745, the electromagnetic coil 743 and the annular permanent magnet 742 are sequentially sleeved on the second guiding rod 744 from top to bottom, a contact ring 746 is disposed on the mounting chassis 741 outside the annular permanent magnet 742 for electrically connecting with the ground wire 9, a contact ring 747 is disposed on the outer circumferential surface of the platen 745 for electrically connecting with the lightning rod 6, the contact ring 747 contacts with the contact plate 746 when the platen 745 is not lifted up, the electromagnetic coil 743 is fixed on the bottom of the platen 745 and is electrically connected with the lightning rod 6 and the ground wire 9 respectively for pushing the platen 745 to lift up when contacting with a high lightning current. Fig. 6 is a schematic circuit diagram of the power carrier lightning protection device of the present invention, in which a resistor R is a large resistor of a ground wire itself, NC is a state in which a contact piece 746 and a contact ring 747 are normally closed, and NO is a state in which a contact 761 and a contact seat 711 are normally open.

The mounting chassis 741 is mounted to the mounting base 71 such that the platen 745, under the weight of the platen 745, presses down to bring the contact ring 747 into contact with the contact pads 746 when lightning is not in contact with the tips of the lightning rod 6. When the lightning is in contact with the tip of the lightning rod 6, the lightning firstly transmits a strong current to the electromagnetic coil 743 through the lightning rod 6, and then triggers the electromagnetic coil to generate a magnetic field, so that the magnetic field is mutually repelled from the annular permanent magnet 742 below, and the electromagnetic coil 743 moves upwards to further push the pressure plate 745 to move upwards. The upwardly moving platen 745 naturally also lifts the insulating flange ring 75 upwardly and the upwardly moving platen 745 also releases the contact ring 747 from contact with the contact pads 746 so that high currents can only be transmitted to ground through the ground 9 which is electrically connected to the solenoid 743. The circuit is broken at the moment when the platen 745 moves upward, and then the platen 745 is again pressed down by the gravity of the platen 745 to make the contact ring 747 and the contact piece 746 contact, and at this time, if the current of the lightning has not disappeared, the upward movement will be performed for the second time, and finally, the lightning will naturally fall down, and the safety is excellent.

In this embodiment, the second guide rod 744 is made of a non-metal material and has a smooth circumferential outer wall surface. A central hole is formed in the middle of the mounting underframe 741 for the second guide rod 744 to be movably inserted, the pressure plate 745 and the electromagnetic coil 743 are both sleeved and fixed on the second guide rod 744, and the annular permanent magnet 742 is sleeved on the second guide rod 744, but is not in contact with the second guide rod 744, but is fixed on the mounting underframe 741; when the solenoid 743 generating the magnetic field moves upward, the platen 745, the solenoid 743, and the second guide rod 744 move upward together.

Further, in the preferred embodiment, the mounting frame 4 is further provided with an outer casing 5, the blocker 7 is installed in the outer casing 5, and a top plate of the outer casing 5 is provided with a water inlet 51 corresponding to the position of the water carrying platform 77. In this embodiment, the number of the lightning rods 6 is four, and four lightning rods 6 are arranged on the top of the side edge of the disc-shaped outer shell 5 in an annular array, so that the outer shell 5 can be stressed more uniformly. The outer shell 5 can protect the blocker 7 and other devices inside and is aesthetic. And rainwater can fall into the water carrying platform 77 below and be collected through the water inlet 51 provided on the top plate of the outer case 5. Of course, the top plate of the outer shell 5 can also be detachable, which is convenient for cleaning and maintaining the components inside.

Further, in the preferred embodiment, an indicator light is further included, and a switch circuit of the indicator light is electrically connected with the contact 761 and the contact seat 711 respectively, so that the indicator light flashes to give an alarm signal when the contact 761 and the contact seat 711 are in contact for lightning strike. The indicating lamp can flash, prompts passers-by, vehicles and the like, keeps away from the lightning guiding device as far as possible, and greatly improves safety.

Further, in the preferred embodiment, a diode is connected in series with the weak current output line of the overload circuit breaker 3, and the diode is conducted along the power transmission direction of the weak current output line, and mainly plays a role of protecting the circuit.

Further, in the preferred embodiment, the bottom plate of the water platform 77 is provided with small drainage holes, which are communicated with the outside through the branch drainage tubes 771 to drain the rainwater in the water platform 77 slowly. Under the condition of rain all the time, the interior of the water carrying platform 77 is always kept to have a certain water level; when the rain stops, the rainwater will not be supplemented any more, carry the inside water of water platform 77 and can only outwards slowly discharge from the drainage branch 771 of path through the drainage aperture, drainage speed is slower, it can be complete discharge to carry the inside water of water platform 77 after a period of time to delay in the equivalent of needs, just can break off the weak current and the lightning rod 6 of inductance element 2 output, make this device have certain time delay service function, even the rain stops, but if still appear when thunder and lightning phenomenon (the rain stops not representing and can not continue the thunder and lightning for a lot of time), still can play splendid lightning protection and lightning induction effect, the security is high, the influence of thunder and lightning to power line carrier communication has effectively been reduced.

Further, in the preferred embodiment, the side walls of the water platform 77 are provided with spillways near the top surface, the spillways are communicated with the outside through spillways 772, and the bottom ends of the branch drains 771 are communicated with the spillways 772. When the rainwater accumulates to a certain amount, the excessive water flows out through the overflow gap and the overflow conduit 772, and the water-carrying platform 77 cannot overflow to damage other devices.

Further, in the preferred embodiment, the contact 746 comprises a ring of outer rings 7461 vertically fixed to the mounting chassis 741, a ring of inwardly inclined guide tapers 7462 are fixed to the inner side of the outer rings 7461, and the guide tapers 7462 are made of thin metal sheet. In this embodiment, the outer surface of the contact ring 747 is a metal surface, and the outer ring diameter of the contact ring 747 is smaller than the inner ring diameter of the outer ring 7461 and larger than the inner ring diameter of the guide cone 7462. That is, the guiding cone 7462 has a guiding function, and is matched with the contact ring 747, so that the bottom end of the contact ring 747 is inserted into the circle of guiding cone 7462 and tightly supports the metal sheet downwards, and the metal sheet has elasticity and can avoid collision.

Further, in the preferred embodiment, the inductance part 2 includes an insulating hanger 21 and a mutual inductance coil group 22 arranged in the insulating hanger 21, the insulating hanger 21 is provided with a hook 211 for being mounted on the power transmission line 11, and the inner side of the hook 211 is provided with an exposed metal sheet 212; the mutual coil group 22 includes a primary coil 221 and a secondary coil 222 which are mutually matched, the primary coil 221 is electrically connected with the metal sheet 212, and the secondary coil 222 is electrically connected with the overload circuit breaker 3. The hook 211 of the inductor 2 can be hung on the power transmission line 11, the exposed metal sheet 212 is communicated with the power transmission line 11 to electrify the main coil 221, and weak current is supplied to the lightning rod 6 by utilizing the mutual inductance between the main coil 221 and the secondary coil 222.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. The utility model provides a power line carrier lightning protection device which characterized in that: the lightning protection device comprises an inductance part (2), an overload circuit breaker (3), a mounting rack (4), a blocker (7) and more than one lightning rod (6), wherein the mounting rack (4) is detachably fixed on a telegraph pole (1) to install the overload circuit breaker (3), the blocker (7) and the more than one lightning rod (6), the inductance part (2), the overload circuit breaker (3), the blocker (7) and the lightning rod (6) are sequentially connected in series and electrically connected, and the inductance part (2) is installed on a power transmission line (11) to be used for leading out weak current from the power transmission line (11) and transmitting the weak current to the lightning rod (6) to attract lightning; the blocking device (7) is also electrically connected to a ground line (9) for breaking the electrical connection to the overload breaker (3) when the lightning rod (6) is in contact with lightning and transmits a high current to the blocking device (7) so that the high current is transmitted to the ground through the ground line (9).

2. The power carrier lightning protection device of claim 1, wherein: the blocker (7) comprises a mounting seat (71), a spring (72), an insulating flange ring (75), a movable disc (76) and a water carrying platform (77); a first guide rod (73) is vertically arranged in the middle of the mounting seat (71), and the movable disc (76), the insulating flange ring (75) and the spring (72) are sequentially and movably sleeved on the first guide rod (73) from top to bottom; the mounting seat (71) is provided with a contact seat (711) used for being electrically connected with the lightning rod (6), and the bottom of the movable disc (76) is provided with a downward convex contact (761) used for being electrically connected with the overload circuit breaker (3); the water carrying platform (77) is fixed above the movable disc (76) through a connecting piece, and when the water carrying platform (77) receives rainwater and presses down the movable disc (76) in rainy days, the contact (761) is in contact with the contact seat (711) and is used for guiding weak current out of the power transmission line (11) and transmitting the weak current to the lightning rod (6) so as to attract thunder and lightning; the mounting seat (71) is further provided with a pusher (74) which can be jacked upwards below the insulating flange ring (75), the pusher (74) is electrically connected with the lightning rod (6) and the grounding wire (9) respectively, and when the lightning rod (6) is in contact with lightning and transmits a strong current to the pusher (74), the pusher (74) jacks the insulating flange ring (75) upwards so that the contact (761) is separated from the contact seat (711) and the strong current is transmitted to the ground through the grounding wire (9).

3. The power carrier lightning protection device of claim 2, wherein: the pusher (74) comprises an installation chassis (741), an annular permanent magnet (742), an electromagnetic ring (743) and a pressure plate (745) for jacking an insulating flange ring (75), a second guide rod (744) is vertically installed in the middle of the installation chassis (741), the pressure plate (745), the electromagnetic ring (743) and the annular permanent magnet (742) are sequentially sleeved on the second guide rod (744) from top to bottom, a circle of contact sheet (746) is arranged on the installation chassis (741) and outside the annular permanent magnet (742) and used for being electrically connected with a grounding wire (9), a circle of contact ring (747) is arranged on the outer circumferential surface of the pressure plate (745) and used for being electrically connected with a lightning rod (6), the contact ring (747) is in contact with the contact sheet (746) when the pressure plate (745) is not jacked, the electromagnetic ring (743) is fixed on the bottom of the pressure plate (745) and is respectively in contact with the lightning rod (6), The grounding wire (9) is electrically connected to generate electromagnetic field to push the pressing plate (745) to jack up upwards when being contacted with strong lightning current.

4. The power carrier lightning protection device of claim 2, wherein: still be equipped with shell body (5) on mounting bracket (4), blocker (7) are installed in shell body (5), water inlet (51) corresponding in water carrying platform (77) position are seted up on the roof of shell body (5).

5. The power carrier lightning protection device of claim 2, wherein: the lightning arrester also comprises an indicator lamp, wherein a switch circuit of the indicator lamp is respectively and electrically connected with the contact (761) and the contact base (711) so as to enable the indicator lamp to flash to give an alarm signal when the contact (761) and the contact base (711) are contacted to conduct lightning strike.

6. The power carrier lightning protection device of claim 2, wherein: the bottom plate of the water carrying platform (77) is provided with small drainage holes, and the small drainage holes are communicated with the outside through the branch drainage pipes (771) so as to slowly drain rainwater in the water carrying platform (77).

7. The power carrier lightning protection device of claim 6, wherein: an overflow port is formed in the side wall of the water carrying platform (77) and is close to the top surface, the overflow port is communicated with the outside through an overflow guide pipe (772), and the bottom end of the drainage branch pipe (771) is communicated with the overflow guide pipe (772).

8. The power carrier lightning protection device of claim 3, wherein: the contact piece (746) comprises a circle of outer ring (7461) vertically fixed on the mounting chassis (741), a circle of inward inclined guide cone (7462) is fixed on the inner side surface of the outer ring (7461), and the guide cone (7462) is a metal sheet.

9. The power carrier lightning protection device of claim 8, wherein: the outer side surface of the contact ring (747) is a metal surface, and the diameter of the outer ring of the contact ring (747) is smaller than that of the inner ring of the outer ring (7461) and larger than that of the inner ring of the guide cone sheet (7462).

10. The power carrier lightning protection device of claim 1, wherein: the inductor (2) comprises an insulating hanger (21) and a mutual inductor group (22) arranged in the insulating hanger (21), the insulating hanger (21) is provided with a hook (211) for being hung on the power transmission line (11), and the inner side of the hook (211) is provided with an exposed metal sheet (212); the mutual inductance coil group (22) comprises a primary coil (221) and a secondary coil (222) which are mutually matched, the primary coil (221) is electrically connected with the metal sheet (212), and the secondary coil (222) is electrically connected with the overload circuit breaker (3).