A new type of multi-cavity gap lightning protection device for power facilities

Abstract

The present invention discloses a novel multi-cavity gap power facility lightning arrester, which belongs to the field of lightning arrester technology. It includes a power pole, a cable, an insulator, a connecting frame and a lightning arrester bracket. The power pole is vertically fixed to the ground, the insulator is fixed on the power pole, the cable extends in the direction through the insulator, the insulator supports the cable, the lightning arrester bracket is fixedly installed on the power pole through the connecting frame, and also includes a lightning arrester column, a line lightning arrester, a terminal, a fastening nut, a conductor, a connecting clamp, a grounding wire and a protective component. One end of the lightning arrester column is fixed on the side of the lightning arrester bracket away from the power pole. The present invention blocks the grounding wire through the protective component to prevent the grounding wire from igniting the combustibles near the grounding wire path due to the excessively high temperature of the grounding wire and contact with combustibles when a large current flows through the grounding wire. At the same time, it can also block the contact of animals with the grounding wire to prevent animals from damaging the grounding wire and affecting the normal use of the grounding wire.

Description

Technical Field

[0001] The invention relates to a novel multi-cavity gap electric power facility lightning arrester, belonging to the technical field of lightning arresters. Background Art

[0002] A lightning arrester is an electrical device used to protect electrical equipment from high transient overvoltage hazards and to limit the follow-through time and often also the follow-through amplitude.

[0003] Most lightning arresters are equipped with grounding wires to conduct the remaining leakage current to the ground. However, the grounding wires of traditional high-altitude cables are mostly directly exposed iron sheet structures. After long-term use, external animals will damage the grounding wires. At the same time, the exposed iron sheet grounding wires will conduct large currents under special working conditions. When the exposed grounding wires come into contact with combustibles, fires are very likely to occur due to the heat generated by the grounding wires. Therefore, there are certain problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a new type of multi-cavity gap lightning protection device for power facilities, which solves the problem in the prior art that external animals may damage the exposed grounding wire, and the exposed iron sheet grounding wire may conduct large current under special working conditions. When the exposed grounding wire comes into contact with combustibles, fire is very likely to occur due to the heating of the grounding wire.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical scheme: a novel multi-cavity gap power facility lightning arrester, including a utility pole, a cable, an insulator, a connecting frame and a lightning arrester bracket, the utility pole is vertically fixed to the ground, the insulator is fixed to the utility pole, the cable extends in the direction through the insulator, the insulator supports the cable, the lightning arrester bracket is fixedly installed on the utility pole through the connecting frame, and also includes a lightning arrester column, a line lightning arrester, a terminal, a fastening nut, a conductor, a connecting clamp, a grounding wire and a protective component, one end of the lightning arrester column is fixed to a side of the lightning arrester bracket away from the utility pole, the line lightning arrester is sleeved on the outside of the lightning arrester column and fixedly connected to the lightning arrester column, and the line lightning arrester is evenly spaced along the extension direction of the lightning arrester column. There are several distances, several terminals are provided and fixed on the relative outer sides of the adjacent line arresters, there is a gap between the relatively arranged terminals and a discharge gap is formed, the wire is fixed on the end of the arrester column away from the arrester bracket, the connecting clamp is provided on the end of the wire away from the arrester column, the connecting clamp connects the wire to the cable, one end of the grounding wire is sleeved with the end of the arrester column away from the wire, the fastening nut is threadedly connected to the end of the arrester column away from the wire, the fastening nut abuts against the grounding wire and limits the separation of the grounding wire from the arrester column, the other end of the grounding wire extends toward the ground along the pole and is inserted into the ground, the protective component is fixed on the arrester bracket, and the protective component prevents foreign objects from contacting the grounding wire by shielding the grounding wire.

[0006] By adopting the above technical solution, through the discharge gap between the relative terminals, when the air between the discharge gaps is broken down, a gas conductor is formed by the discharge of the discharge gap, allowing the overvoltage to pass through the discharge circuit of the lightning arrester and forming a flashover current, so as to achieve the purpose of protecting the power system. At the same time, all strong and weak currents during the entire service life of the lightning protection device can be conducted to the ground through the grounding wire. When the current flows through the grounding wire, due to the resistance of the grounding wire itself, the grounding wire will generate heat. The grounding wire is blocked by the protection component to prevent the grounding wire from contacting combustibles when passing through a large current, causing the combustibles near the grounding wire path to catch fire due to the excessive temperature of the grounding wire. At the same time, it can also block the contact of animals with the grounding wire and prevent animals from damaging the grounding wire and affecting the normal use of the grounding wire.

[0007] The present invention is further configured as follows: The protection component includes an outer protective shell, insertion columns, a first sliding shell, and a second sliding shell. The horizontal cross-section of the outer protective shell is in a U-shaped setting. The two ends of the outer protective shell extend towards the lightning arrester bracket and abut against the opposite sides of the lightning arrester bracket. A plurality of insertion columns are provided. The insertion columns penetrate the outer protective shell and the lightning arrester bracket in the horizontal direction at the same time. The insertion columns limit the relative movement between the outer protective shell and the lightning arrester bracket. The insertion columns are respectively inserted into the outer protective shell and the lightning arrester bracket. The extending direction of the insertion columns does not interfere with the extending direction of the grounding wire. The space formed by the outer protective shell and the lightning arrester bracket surrounding is the protection space. The extending path of the grounding wire passes through the protection space. The first sliding shell is arranged on the side of the outer protective shell facing the lightning arrester bracket. The first sliding shell is slidably connected to the outer protective shell along the extending direction of the electric pole. The second sliding shell is arranged on the side of the first sliding shell facing the lightning arrester bracket. The second sliding shell is slidably connected to the first sliding shell along the extending direction of the electric pole. There is a gap between the outer protective shell, the first sliding shell, the second sliding shell and the grounding wire.

[0008] By adopting the above technical solution, when the extending length of the grounding wire is long and greater than the length of the outer protective shell, the length of the outer protective shell is supplemented by sliding the first sliding shell and the second sliding shell, so that the protection component can adapt to grounding wires of different lengths and improve the applicable range of the protection component.

[0009] The present invention is further configured as follows: A sealing shell fixedly connected to the lightning arrester bracket is provided at the part where the extending path of the grounding wire passes through the lightning arrester bracket. The horizontal cross-section of the sealing shell is in a U-shaped setting. The sealing shell and the lightning arrester bracket surround to form an airtight space. The extending path of the grounding wire passes through the airtight space. Sealing plates are fixedly installed at the openings at both ends of the airtight space along the extending direction of the sealing shell. The sealing plates seal the airtight space. The grounding wire penetrates the sealing plates and the connection between the grounding wire and the sealing plates abuts and seals. Inert gas is filled in the airtight space.

[0010] By adopting the above technical solution, the extended part of the grounding wire is sealed with a sealing shell, a lightning arrester bracket and a sealing plate, and an inert gas is filled in the airtight space. This can prevent the grounding wire from being exposed to the outdoor environment for a long time, prevent the grounding wire from rusting and oxidizing, and help to increase the service life of the grounding wire.

[0011] The present invention is further configured as follows: a connecting block is provided on the side of the grounding wire away from the line lightning arrester, a through hole is provided on the connecting block, a through hole aligned with the through hole is provided on the grounding wire, a bolt member is inserted into the through hole, an end of the bolt member passes through the through hole and is threadedly connected to the lightning arrester bracket, the bolt member fixes the connecting block and the grounding wire with the lightning arrester bracket, a connecting rod is fixed on the side of the connecting block away from the grounding wire, the connecting rod extends radially toward the lightning arrester column, a plurality of connecting rods are provided, and the plurality of connecting rods are arranged in a circular array with the lightning arrester column as the axis at equal angles, a fixing column is fixed on a side of the connecting rod away from the connecting block and an end away from the connecting block, the axial direction of the fixing column is the same as the axial direction of the lightning arrester column, a storage cavity is provided in the fixing column, the storage cavity penetrates the fixing column on the side facing the line lightning arrester, a lightning arrester column is axially slidably provided in the storage cavity, a spring is fixedly provided at one end of the lightning arrester column away from the line lightning arrester, and the spring abuts against the bottom wall of the storage cavity.

[0012] The present invention is further configured as follows: a filling cavity is opened in the lightning arrester body, the filling cavity penetrates the lightning arrester body on the side facing the line lightning arrester, a sealing plug is inserted at the opening of the filling cavity, an insulating end is fixed on the side of the sealing plug facing the line lightning arrester, an insulating core is fixed on the side of the sealing plug away from the line lightning arrester, a pull rope is fixed on the side of the insulating core away from the sealing plug, the pull rope is accumulated in the filling cavity, and the end of the pull rope away from the insulating core is fixedly connected to the inner wall of the filling cavity.

[0013] By adopting the above technical solution, the connecting block is fixedly connected to the lightning arrester bracket, and the fixed column and the lightning arrester column are kept in a relatively fixed state with the lightning arrester bracket. At this time, the spring is compressed, and under the elastic action of the spring, the end of the lightning arrester column toward the line lightning arrester has a movement tendency toward the line lightning arrester. Therefore, at this time, the insulating end is abutted against the line lightning arrester. Under the abutment action of the line lightning arrester, the lightning arrester column remains in a static state. When the line lightning arrester is damaged and fails due to lightning protection operations or external factors, the line lightning arrester will be damaged. At this time, a cavity is generated at the damaged part of the line lightning arrester and the movement of the lightning arrester cannot be restricted. At this time, the lightning arrester column moves rapidly toward the line lightning arrester under the elastic action of the spring. When the lightning arrester column moves to the limit position, it cannot continue to move. At this time, the elastic force of the spring is equal to the gravity of the lightning arrester. The spring supports the lightning rod, but the insulating end continues to move due to inertia, thereby driving the sealing plug and the insulating core to continue to move. When the insulating end, the sealing plug and the insulating core fall out of the filling cavity, they will fall from a high altitude. At this time, the pull rope is released from the lightning rod, and the pulling force of the pull rope will generate pulling force on the insulating core. At this time, the insulating core, the sealing plug and the insulating end are pulled by the pull rope and cannot fall from a high altitude, thereby effectively protecting the safety of objects or personnel under the electric pole. At this time, the lightning rod can be used as a lightning rod temporarily. When the lightning rod is struck by lightning, the lightning rod can absorb the lightning strike and transfer the potential energy of the lightning strike to the ground through the connecting rod, the connecting block and the grounding wire in turn, thereby forming a temporary lightning protection structure. This can greatly enhance the reliability of the lightning protection device, which is beneficial to protecting the safety of the cable line.

[0014] The present invention is further configured as follows: an air duct is provided on the side of the lightning arrester bracket away from the sealing shell, one end of the air duct passes through the lightning arrester bracket and is connected with the airtight space, the other end of the air duct passes through the fixed column and is connected with the storage cavity, and a connecting cavity is provided on the side of the filling cavity away from the opening, and the connecting cavity connects the filling cavity with the storage cavity.

[0015] The present invention is further configured as follows: a sealing rod is fixed on the side of the storage chamber away from the opening, the end of the sealing rod extends into the connecting chamber, the sealing rod seals the filling chamber and the storage chamber, the sealing plug seals the opening of the filling chamber, and the filling chamber is filled with inert gas.

[0016] By adopting the above technical solution, when the lightning rod is popped out from the fixed column, the line lightning arrester is separated from the insulating end. At this time, the gas pressure filled in the filling cavity is greater than the atmospheric pressure. At this time, the sealing plug and the insulating end together with the insulating core are pushed out from the opening of the filling cavity under the action of the pressure difference. In this way, the separation of the lightning rod and the insulating end can be more reliable without relying solely on inertia. At the same time, the inert gas in the filling cavity is discharged through the opening of the filling cavity and diverges to the surroundings of the line lightning arrester during the process of the lightning rod popping out. When the line lightning arrester is damaged by lightning and catches fire or is attached to the line arrester When the flammable materials on the lightning device cause the line lightning arrester to be damaged and catch fire, the inert gas can isolate the air and extinguish the fire at the fire point, which is beneficial to reduce the probability of fire. In the process of the lightning rod popping out from the opening of the filling chamber, the sealing rod is pulled out from the connecting chamber. At this time, the filling chamber and the storage chamber are connected through the connecting chamber, and because the storage chamber is connected to the airtight space through the air duct, the gas in the airtight space can be discharged to the vicinity of the line lightning arrester through the air duct, the storage chamber, the connecting chamber and the filling chamber in turn, thereby ensuring the supply of inert gas and maximizing the ability to control the ignition potential of the fire point.

[0017] The present invention is further configured as follows: a magnetic attraction element is fixedly provided on the outer protective shell on the side of the first sliding shell and the second sliding shell in the sliding direction and away from the ground, and the magnetic attraction element generates magnetism and magnetically adsorbs the first sliding shell and the second sliding shell only after being energized.

[0018] By adopting the above technical solution, when the first sliding shell and the second sliding shell do not need to shield the grounding wire in a normal state, the magnetic attraction element is energized, and the first sliding shell and the second sliding shell are adsorbed by the magnetic attraction element. When the lightning protection device enters the working state, the magnetic attraction element is de-energized, and the first sliding shell and the second sliding shell slide under the action of gravity to cover the grounding wire, which is beneficial to the protection of the first sliding shell and the second sliding shell under normal conditions.

[0019] The beneficial effects of the present invention are as follows: through the discharge gap between the relative terminals, when the air between the discharge gap is broken down, the discharge of the discharge gap is used to form a gas conductor, so that the overvoltage passes through the arrester discharge circuit and forms a flashover current, so as to achieve the purpose of protecting the power system. At the same time, all strong and weak currents in the entire use cycle of the lightning arrester can be conducted to the ground through the grounding wire. When the current flows through the grounding wire, the grounding wire will generate heat because of the resistance of the grounding wire itself. The grounding wire is blocked by the protective component to prevent the grounding wire from flowing through a large current. The grounding wire temperature is too high and contacts with combustibles, igniting combustibles near the grounding wire path. At the same time, it can also block animals from contacting the grounding wire, preventing animals from damaging the grounding wire and affecting the normal use of the grounding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure when the connecting rod and the fixing column are installed in the present invention;

[0022] Figure 3 It is a structural cross-sectional view of the present invention;

[0023] Figure 4 for Figure 3 A magnified view of the structure at center A;

[0024] Figure 5 for Figure 3 A magnified view of the structure at B in the middle;

[0025] Figure 6 It is a partial structural cross-sectional view of the lightning protection column in the present invention;

[0026] Figure 7 It is a partial structural cross-sectional view of the protection component in the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the line lightning arrester after the damaged lightning arrester column bounces up in the present invention.

[0028] In the figure: 10, lightning arrester bracket; 11, lightning arrester column; 12, line lightning arrester; 13, terminal; 14, fastening nut; 15, wire; 16, connecting clip; 17, grounding wire; 18, prefabricated channel; 19, bolt; 20, outer protective shell; 21, plug-in column; 22, sealing plate; 23, first sliding shell; 24, second sliding shell; 25, sealing shell; 26, magnetic element; 30, connecting block; 31, connecting rod; 32, fixing column; 33, lightning arrester column; 34, insulating end; 35, sealing plug; 36, insulating core; 37, pull rope; 38, filling cavity; 39, through hole; 40, connecting cavity; 41, sealing plug; 42, spring; 43, storage cavity; 44, air duct. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following is a brief introduction Figure 1-8 The present invention is further described.

[0030] like Figure 1-3As shown, a novel multi-cavity gap power facility lightning arrester includes a utility pole, a cable, an insulator, a connecting frame and a lightning arrester bracket 10. The utility pole is vertically fixed to the ground, the insulator is fixed to the utility pole, the cable extends in the direction through the insulator, and the insulator supports the cable. The lightning arrester bracket 10 is fixedly installed on the utility pole through the connecting frame, and also includes a lightning arrester column 11, a line lightning arrester 12, a terminal 13, a fastening nut 14, a wire 15, a connecting clamp 16, a grounding wire 17 and a protective component. One end of the lightning arrester column 11 is fixed to a side of the lightning arrester bracket 10 away from the utility pole, the line lightning arrester 12 is sleeved on the outside of the lightning arrester column 11 and fixedly connected to the lightning arrester column 11, a plurality of line lightning arresters 12 are arranged at equal intervals along the extension direction of the lightning arrester column 11, and a plurality of terminals 13 are arranged and It is fixed on the relative outer side of the adjacent line lightning arrester 12, there is a gap between the relatively arranged terminals 13 and a discharge gap is formed, the wire 15 is fixed on the end of the lightning arrester column 11 away from the lightning arrester bracket 10, the connecting clamp 16 is arranged on the end of the wire 15 away from the lightning arrester column 11, the connecting clamp 16 connects the wire 15 to the cable, one end of the grounding wire 17 is sleeved with the end of the lightning arrester column 11 away from the wire 15, the fastening nut 14 is threadedly connected to the end of the lightning arrester column 11 away from the wire 15, the fastening nut 14 abuts against the grounding wire 17 and limits the separation of the grounding wire 17 from the lightning arrester column 11, the other end of the grounding wire 17 extends toward the ground along the electric pole and is inserted into the ground, the protective component is fixed on the lightning arrester bracket 10, and the protective component prevents foreign objects from contacting the grounding wire 17 by shielding the grounding wire 17.

[0031] like Figure 1-3As shown in the figure, the protection component includes an outer protection shell 20, a plug-in column 21, a first sliding shell 23 and a second sliding shell 24. The horizontal section of the outer protection shell 20 is arranged in a U shape. The two ends of the outer protection shell 20 extend towards the lightning arrester support 10 and abut against the opposite sides of the lightning arrester support 10. A plurality of plug-in columns 21 are provided. The plug-in columns 21 penetrate through the outer protection shell 20 and the lightning arrester support 10 in the horizontal direction at the same time. The plug-in columns 21 limit the relative movement between the outer protection shell 20 and the lightning arrester support 10. The plug-in columns 21 are respectively inserted into the outer protection shell 20 and the lightning arrester support 10. The extension direction of the plug-in columns 21 does not interfere with the extension direction of the grounding wire 17. The space formed by the enclosure of the outer protection shell 20 and the lightning arrester support 10 is a protection space. The extension path of the grounding wire 17 passes through the protection space. The first sliding shell 23 is arranged on the side of the outer protection shell 20 facing the lightning arrester support 10. The first sliding shell 23 is slidably connected with the outer protection shell 20 along the extension direction of the electric pole. The second sliding shell 24 is arranged on the side of the first sliding shell 23 facing the lightning arrester support 10. The second sliding shell 24 is slidably connected with the first sliding shell 23 along the extension direction of the electric pole. There is a gap between the outer protection shell 20, the first sliding shell 23, the second sliding shell 24 and the grounding wire 17. At locations where the protection requirements are not high, the protection component can be arranged in the form of wrapping the grounding wire 17 with a plastic sleeve. The plastic sleeve is fixed to the electric pole by means of a tie strap.

[0032] As Figure 3-7As shown, a part of the extension path of the grounding wire 17 passing through the arrester support 10 is provided with a sealing shell 25 fixedly connected to the arrester support 10. The horizontal section of the sealing shell 25 is in a U-shaped arrangement. The sealing shell 25 and the arrester support 10 enclose an airtight space. The extension path of the grounding wire 17 passes through the airtight space. Sealing plates 22 are fixedly installed at both openings of the airtight space along the extension direction of the sealing shell 25. The sealing plates 22 seal the airtight space. The grounding wire 17 penetrates through the sealing plates 22 and the connection between the grounding wire 17 and the sealing plates 22 is in sealing contact. An inert gas is filled in the airtight space. A connecting block 30 is provided on the side of the grounding wire 17 away from the line arrester 12. A through hole 39 is formed in the connecting block 30. A through hole 39 is formed in the grounding wire 17 and is aligned with the through hole 39. A bolt member 19 is inserted into the through hole 39. The end of the bolt member 19 passes through the through hole and is threadedly connected to the arrester support 10. The bolt member 19 fixedly connects the connecting block 30 and the grounding wire 17 to the arrester support 10. A connecting rod 31 is fixed on the side of the connecting block 30 away from the grounding wire 17. The connecting rod 31 extends radially towards the arrester column 11. A plurality of connecting rods 31 are provided. The plurality of connecting rods 31 are arranged in an equiangular circumferential array with the arrester column 11 as the axis. A fixing column 32 is fixed on the side surface of the connecting rod 31 away from the connecting block 30 and at the end away from the connecting block 30. The axial direction of the fixing column 32 is the same as the axial direction of the arrester column 11. A receiving cavity 43 is formed in the fixing column 32. The receiving cavity 43 penetrates the fixing column 32 towards the side of the line arrester 12. A lightning arrester column 33 is slidably arranged along the axial direction in the receiving cavity 43. A spring 42 is fixedly arranged at one end of the lightning arrester column 33 away from the line arrester 12. The spring 42 abuts against the bottom wall of the receiving cavity 43. A prefabricated channel 18 is vertically penetrated through the arrester support 10 and the grounding wire 17. When the end of the connecting rod 31 is located at the opening of the prefabricated channel 18, that is, when the fixing column 32 is located at the opening of the prefabricated channel 18, at this time, the lightning arrester column 33 and the insulating end 34 are located in the prefabricated channel 18. No connecting rod 31 is provided in the part of the remaining prefabricated channel 18 and the extension path of the grounding wire 17 that blocks the line arrester 12.

[0033] As Figure 1-6As shown, a filling cavity 38 is provided in the lightning arrester column 33, and the filling cavity 38 penetrates the lightning arrester column 33 on the side facing the line lightning arrester 12, and a sealing plug 35 is inserted at the opening of the filling cavity 38, and an insulating end 34 is fixed on the side of the sealing plug 35 facing the line lightning arrester 12, and an insulating core 36 is fixed on the side of the sealing plug 35 away from the line lightning arrester 12, and a pull rope 37 is fixed on the side of the insulating core 36 away from the sealing plug 35, and the pull rope 37 is accumulated in the filling cavity 38, and one end of the pull rope 37 away from the insulating core 36 is fixedly connected to the inner wall of the filling cavity 38. An air duct 44 is provided on the side of the lightning arrester bracket 10 away from the sealing shell 25, and one end of the air duct 44 penetrates the lightning arrester bracket 10 and communicates with the airtight space, and the other end of the air duct 44 penetrates the fixed column 32 and communicates with the storage cavity 43, and a connecting cavity 40 is provided on the side of the filling cavity 38 away from the opening, and the connecting cavity 40 connects the filling cavity 38 with the storage cavity 43. A sealing rod 41 is fixed to the side of the storage chamber 43 away from the opening, and the end of the sealing rod 41 extends into the connecting chamber 40. The sealing rod 41 seals and separates the filling chamber 38 from the storage chamber 43. The sealing plug 35 seals the opening of the filling chamber 38, and the filling chamber 38 is filled with inert gas.

[0034] Through the discharge gap between the relative terminals 13, when the air between the discharge gap is broken down, the discharge of the discharge gap is used to form a gas conductor, so that the overvoltage passes through the arrester discharge circuit and forms a flashover current, so as to achieve the purpose of protecting the power system. At the same time, all strong and weak currents in the entire use cycle of the lightning arrester can be conducted to the ground through the grounding wire 17. When the current flows through the grounding wire 17, because the grounding wire 17 itself has resistance, the grounding wire 17 will generate heat. The grounding wire 17 is blocked by the protective component to prevent the grounding wire 17 from flowing through a large current. Due to the high temperature of the grounding wire 17 and contact with combustibles, the combustibles near the path of the grounding wire 17 are ignited. At the same time, it can also block the contact of animals with the grounding wire 17 to prevent animals from damaging the grounding wire 17 and affecting the normal use of the grounding wire 17. When the extension length of the grounding wire 17 is long and greater than the length of the outer protective shell 20, the length of the outer protective shell 20 is supplemented by sliding the first sliding shell 23 and the second sliding shell 24, so that the protective component can adapt to grounding wires 17 of different lengths, thereby improving the applicable range of the protective component.

[0035] The extended portion of the grounding wire 17 is sealed by using a sealing shell 25, a lightning arrester bracket 10 and a sealing plate 22, and an inert gas is filled in the airtight space. This can prevent the grounding wire 17 from being exposed to the outdoor environment for a long time, prevent the grounding wire 17 from rusting and oxidation, and help to increase the service life of the grounding wire 17. The connecting block 30 is fixedly connected to the lightning arrester bracket 10, and the fixing column 32 and the lightning arrester column 33 are kept in a relatively fixed state with the lightning arrester bracket 10. At this time, the spring 42 is compressed, and the lightning arrester column 33 has a movement tendency toward one end of the line lightning arrester 12 toward the line lightning arrester 12 under the elastic action of the spring 42. Therefore, at this time, the insulating end 34 abuts against the line lightning arrester 12. Under the abutment action of the line lightning arrester 12, the lightning arrester column 33 remains in a static state. When the line lightning arrester 12 is damaged and fails due to lightning protection operations or external factors, the line lightning arrester 12 will be damaged. At this time, a cavity is generated at the damaged part of the line lightning arrester 12 and the movement of the lightning arrester column 33 cannot be restricted. At this time, the lightning arrester column 33 moves rapidly toward the line lightning arrester 12 under the elastic action of the spring 42. When the lightning arrester column 33 moves to the limit position, it cannot continue to move. At this time, the elastic force of the spring 42 is equal to the gravity of the lightning arrester column 33, and the spring 42 The lightning rod 33 is supported, but the insulating end 34 continues to move due to inertia, so that the insulating end 34 drives the sealing plug 35 and the insulating core 36 to continue to move. When the insulating end 34, the sealing plug 35 and the insulating core 36 are released from the filling cavity 38, they will fall from a high altitude. At this time, the pull rope 37 is released from the lightning rod 33, and the pulling force of the pull rope 37 will generate pulling force on the insulating core 36. At this time, the insulating core 36, the sealing plug 35 and the insulating end 34 are pulled by the pull rope 37 and cannot fall from a high altitude, thereby effectively protecting the safety of objects or personnel under the utility pole. At this time, the lightning rod 33 can be used as a lightning rod temporarily. When the lightning rod 33 is struck by lightning, the lightning rod 33 can absorb the lightning strike and transfer the potential energy of the lightning strike to the ground through the connecting rod 31, the connecting block 30 and the grounding wire 17 in sequence, thereby forming a temporary lightning protection structure. This can greatly enhance the reliability of the lightning protection device and is beneficial to protecting the safety of the cable line.

[0036] When the lightning rod 33 pops out from the fixed column 32, the line lightning arrester 12 is separated from the insulating end 34. At this time, the gas pressure filled in the filling cavity 38 is greater than the atmospheric pressure. At this time, the sealing plug 35 and the insulating end 34 together with the insulating core 36 are pushed out from the opening of the filling cavity 38 under the action of the pressure difference. In this way, the separation of the lightning rod 33 from the insulating end 34 can be more reliable without relying solely on inertia. At the same time, the inert gas in the filling cavity 38 is discharged through the opening of the filling cavity 38 and diffused to the surroundings of the line lightning arrester 12 during the process of the lightning rod 33 popping out. When the line lightning arrester 12 is damaged by lightning and catches fire or due to the attachment to the line lightning arrester 12 When flammable materials cause the line lightning arrester 12 to be damaged and catch fire, the inert gas can isolate the air and extinguish the fire at the fire point, which is helpful to reduce the probability of fire. In the process of the lightning rod 33 popping out from the opening of the filling chamber 38, the sealing rod 41 is pulled out from the connecting chamber 40. At this time, the filling chamber 38 and the storage chamber 43 are connected through the connecting chamber 40, and because the storage chamber 43 is connected to the airtight space through the air duct 44, the gas in the airtight space can be discharged to the vicinity of the line lightning arrester 12 through the air duct 44, the storage chamber 43, the connecting chamber 40 and the filling chamber 38 in turn, thereby ensuring the supply of inert gas and maximizing the ability to control the ignition potential of the fire point.

[0037] like Figure 3 As shown, the outer protective shell 20 is fixedly provided with a magnetic element 26 on the side away from the ground in the sliding direction of the first sliding shell 23 and the second sliding shell 24. The magnetic element 26 generates magnetism only after being energized and magnetically absorbs the first sliding shell 23 and the second sliding shell 24. The magnetic element 26 includes a sensing module, a processing module and a magnetic module. The sensing module is electrically connected to the processing module, and the processing module is electrically connected to the magnetic module. The magnetic element 26 is also integrated with a battery pack for powering the sensing module, the processing module and the magnetic module. The sensing module is used to sense the current flowing through the line lightning arrester 12. When the sensing module senses the current flowing through the line lightning arrester 12, the information is transmitted to the processing module. The processing module controls the magnetic element 26 to cut off the power. At this time, the magnetic module loses its magnetism, and the first sliding shell 23 and the second sliding shell 24 slide under the action of gravity to cover the grounding wire 17, which is beneficial to the protection of the first sliding shell 23 and the second sliding shell 24 under normal conditions. When the first sliding shell 23 and the second sliding shell 24 do not need to shield the ground wire 17 in a normal state, the magnetic element 26 is energized, and the first sliding shell 23 and the second sliding shell 24 are adsorbed by the magnetic element 26, and the first sliding shell 23 and the second sliding shell 24 are stored in the protective space.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A novel multi-cavity gap power facility lightning arrester, comprising a utility pole, a cable, an insulator, a connecting frame and a lightning arrester bracket (10), wherein the utility pole is vertically fixed to the ground, the insulator is fixed to the utility pole, the cable extends through the insulator, the insulator supports the cable, and the lightning arrester bracket (10) is fixedly mounted on the utility pole via the connecting frame, characterized in that: It also includes an arrester column (11), a line arrester (12), a terminal (13), a fastening nut (14), a conductor (15), a connecting clamp (16), a grounding wire (17) and a protective component. One end of the arrester column (11) is fixed to a side of the arrester bracket (10) away from the electric pole. The line arrester (12) is sleeved on the outside of the arrester column (11) and fixedly connected to the arrester column (11). A plurality of line arresters (12) are arranged at equal intervals along the extension direction of the arrester column (11). A plurality of terminals (13) are arranged and fixed to opposite outer sides of adjacent line arresters (12). There is a gap between the oppositely arranged terminals (13) to form a discharge gap. The conductor (15) is fixed to the side of the arrester column (11) away from the electric pole. At one end of the arrester bracket (10), a connecting clamp (16) is arranged at an end of the conductor (15) away from the arrester column (11), the connecting clamp (16) connects the conductor (15) to the cable, one end of the grounding wire (17) is sleeved with an end of the arrester column (11) away from the conductor (15), a fastening nut (14) is threadedly connected to an end of the arrester column (11) away from the conductor (15), the fastening nut (14) abuts against the grounding wire (17) and restricts the grounding wire (17) from being separated from the arrester column (11), the other end of the grounding wire (17) extends along the electric pole toward the ground and is inserted into the ground, a protective component is fixed on the arrester bracket (10), and the protective component prevents foreign matter from contacting the grounding wire (17) by shielding the grounding wire (17); A sealing shell (25) fixedly connected to the arrester bracket (10) is provided at a portion of the grounding wire (17) extending path passing through the arrester bracket (10); a horizontal section of the sealing shell (25) is arranged in a U-shaped shape; the sealing shell (25) and the arrester bracket (10) surround an airtight space; the grounding wire (17) extending path passes through the airtight space; sealing plates (22) are fixedly installed at openings at both ends of the airtight space along the extending direction of the sealing shell (25); the sealing plates (22) seal the airtight space; the grounding wire (17) passes through the sealing plate (22); and a connection between the grounding wire (17) and the sealing plate (22) is abutted and sealed; and the airtight space is filled with an inert gas; A connecting block (30) is provided on the side of the grounding wire (17) away from the line arrester (12), a through hole (39) is provided on the connecting block (30), a through hole (39) is provided on the grounding wire (17) and aligned with the through hole (39), a bolt member (19) is inserted into the through hole (39), an end of the bolt member (19) passes through the through hole and is threadedly connected to the arrester bracket (10), the bolt member (19) fixes the connecting block (30) and the grounding wire (17) to the arrester bracket (10), a connecting rod (31) is fixed on the side of the connecting block (30) away from the grounding wire (17), the connecting rod (31) extends radially toward the arrester column (11), and the connecting rod (31) is provided with a plurality of A plurality of connecting rods (31) are arranged in a circular array at equal angles with the arrester column (11) as the axis, a fixing column (32) is fixed to a side of the connecting rod (31) away from the connecting block (30) and an end away from the connecting block (30), the axial direction of the fixing column (32) is the same as the axial direction of the arrester column (11), a receiving cavity (43) is provided in the fixing column (32), the receiving cavity (43) penetrates the fixing column (32) toward a side of the line arrester (12), a lightning arrester column (33) is axially slidably arranged in the receiving cavity (43), a spring (42) is fixedly arranged at one end of the lightning arrester column (33) away from the line arrester (12), and the spring (42) abuts against the bottom wall of the receiving cavity (43); A filling cavity (38) is provided in the lightning arrester column (33), and the filling cavity (38) penetrates the lightning arrester column (33) on the side facing the line lightning arrester (12). A sealing plug (35) is inserted into the opening of the filling cavity (38), and an insulating end (34) is fixed on the side of the sealing plug (35) facing the line lightning arrester (12). An insulating core (36) is fixed on the side of the sealing plug (35) away from the line lightning arrester (12), and a pull rope (37) is fixed on the side of the insulating core (36) away from the sealing plug (35). The pull rope (37) is accumulated in the filling cavity (38), and one end of the pull rope (37) away from the insulating core (36) is fixedly connected to the inner wall of the filling cavity (38).

2. According to claim 1, a novel multi-cavity gap power facility lightning protection device is characterized in that: The protection component comprises an outer protective shell (20), a plug-in column (21), a first sliding shell (23) and a second sliding shell (24); the horizontal section of the outer protective shell (20) is arranged in a U-shaped shape; the two ends of the outer protective shell (20) extend in the direction of the arrester bracket (10) and abut against the opposite side of the arrester bracket (10); a plurality of plug-in columns (21) are arranged; the plug-in columns (21) penetrate the outer protective shell (20) and the arrester bracket (10) in the horizontal direction at the same time; the plug-in columns (21) restrict the relative movement of the outer protective shell (20) and the arrester bracket (10); the plug-in columns (21) are respectively plugged with the outer protective shell (20) and the arrester bracket (10); the extension direction of the plug-in columns (21) does not collide with the grounding wire; The outer protective shell (20) and the lightning arrester bracket (10) interfere with each other in the extension direction of the electric pole; the space surrounded by the outer protective shell (20) and the lightning arrester bracket (10) is the protective space; the extension path of the grounding wire (17) passes through the protective space; the first sliding shell (23) is arranged on the side of the outer protective shell (20) facing the lightning arrester bracket (10); the first sliding shell (23) and the outer protective shell (20) are slidably connected along the extension direction of the electric pole; the second sliding shell (24) is arranged on the side of the first sliding shell (23) facing the lightning arrester bracket (10); the second sliding shell (24) and the first sliding shell (23) are slidably connected along the extension direction of the electric pole; and there is a gap between the outer protective shell (20), the first sliding shell (23) and the second sliding shell (24) and the grounding wire (17).

3. According to claim 1, a novel multi-cavity gap power facility lightning protection device is characterized in that: An air duct (44) is provided on a side of the arrester bracket (10) away from the sealing shell (25); one end of the air duct (44) passes through the arrester bracket (10) and is connected to the airtight space; the other end of the air duct (44) passes through the fixing column (32) and is connected to the storage chamber (43); a connecting chamber (40) is provided on a side of the filling chamber (38) away from the opening; the connecting chamber (40) connects the filling chamber (38) with the storage chamber (43).

4. A novel multi-cavity gap lightning protection device for electric power facilities according to claim 3, characterized in that: A sealing rod (41) is fixed to a side of the storage chamber (43) away from the opening, the end of the sealing rod (41) extends into the connecting chamber (40), the sealing rod (41) seals and separates the filling chamber (38) from the storage chamber (43), the sealing plug (35) seals the opening of the filling chamber (38), and the filling chamber (38) is filled with an inert gas.

5. According to claim 2, a novel multi-cavity gap power facility lightning protection device is characterized in that: A magnetic attraction element (26) is fixedly provided on the outer protective shell (20) on a side away from the ground and in the sliding direction of the first sliding shell (23) and the second sliding shell (24). The magnetic attraction element (26) generates magnetism only after being energized and magnetically attracts the first sliding shell (23) and the second sliding shell (24).

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