A lightning protection power-off protection device for a transformer

Abstract

The application discloses a lightning-protection power-off protection device for a transformer, and belongs to the technical field of lightning-protection power-off protection devices for transformers. The device comprises a shell assembly and a lightning-protection power-off device. The lightning-protection power-off device is assembled in the shell assembly and penetrates the top of the shell assembly at the upper end. When lightning strikes, the lightning enters the inside of the conductive plate through the lightning rod and is delivered to the inside of the soil. When the lightning strikes, the bottom of the lightning rod generates heat and drives the copper block to expand by the frame. The copper block expands along the frame to the two sides, slides the two connecting plates to the two sides, and makes the insulation part contact the connector. At this time, the device can automatically cut off the power supply and protect the transformer and the circuit. When maintaining, the two connecting plates can be pushed to the inside from the first slots on the two sides to restore the power supply, and the transformer can be better protected.

Description

Technical Field

[0001] This invention belongs to the field of transformer lightning strike power outage protection technology, specifically, it relates to a transformer lightning strike power outage protection device. Background Technology

[0002] A power transformer is a static electrical device used to transform an alternating current (AC) voltage (or current) of a certain value into one or more different values ​​of voltage (or current) at the same frequency. It is a static device with two or more windings that, in order to transmit electrical energy, converts the AC voltage and current of one system into the voltage and current of another system through electromagnetic induction at the same frequency; typically, these currents and voltages have different values. A transformer is a static electrical device used to transform AC voltage and current to transmit AC electrical energy. It achieves electrical energy transfer based on the principle of electromagnetic induction. Transformers can be classified according to their uses into power transformers, testing transformers, instrument transformers, and special-purpose transformers: power transformers are essential equipment for power transmission and distribution, and power distribution to users; testing transformers are used for withstand voltage (step-up) tests on electrical equipment; instrument transformers are used for electrical measurement and relay protection (PT, CT) in power distribution systems; special-purpose transformers include electric furnace transformers for metallurgy, welding transformers, rectifier transformers for electrolysis, and small voltage regulating transformers, etc.

[0003] Most existing transformers conduct lightning to the ground via lightning rods after being struck by lightning. However, if the lightning is strong and the transformer is not de-energized, it may catch fire and damage other lines, causing even greater losses. Summary of the Invention

[0004] In response to the problem that existing transformers, after being struck by lightning, mostly rely on lightning rods to conduct lightning to the ground, but if the lightning is strong enough and the transformer is not de-energized, it can catch fire and damage other lines, causing even greater losses, this invention provides a transformer lightning strike power-off protection device. This device includes a housing assembly and a lightning strike power-off device. The lightning strike power-off device is installed inside the housing assembly, with its upper end penetrating the top of the housing assembly. This component, when used together, can effectively solve the problem that existing transformers, after being struck by lightning, mostly rely on lightning rods to conduct lightning to the ground, but if the lightning is strong enough and the transformer is not de-energized, it can catch fire and damage other lines, causing even greater losses.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A transformer lightning strike protection device includes a housing assembly and a lightning strike power-off device, wherein the lightning strike power-off device is installed inside the housing assembly and its upper end penetrates the top of the housing assembly.

[0007] Preferably, the housing assembly includes a housing, with symmetrical triangular doors rotatably connected to the front and rear sides of the housing. Ventilation grooves are provided on the opposite surfaces and bottom of both sides of the housing, and the triangular doors and ventilation grooves are interconnected. A mounting hole is provided at the center of the upper end of the housing, with multiple through holes on both sides of the mounting hole. A first slot is provided on the outer wall of the housing near the mounting hole, penetrating the center of the through holes and the mounting hole and extending out from the other side of the housing. Symmetrical lock holes are provided on the front and rear sides of the housing. Symmetrical insertion holes are provided on the left and right sides of the housing near the bottom of the back surface, with threaded holes inside the insertion holes near the back surface. Symmetrical first sliding grooves are provided on the inner bottom of the housing, with symmetrical first locking grooves on both sides of each first sliding groove near the front of the housing. Symmetrical second sliding grooves are provided on the inner walls of the housing near the bottom. The housing is locked by the lock holes in conjunction with the triangular doors. The interior of the housing, along with the through holes and mounting holes, is used to assemble a lightning protection power-off device. The ventilation grooves allow the heat from the lightning protection power-off device to be blown out through the ventilation grooves at the bottom of the housing, and the shape of the triangular doors provides effective rain protection.

[0008] Preferably, a second slot is provided on the front of the housing near the upper end, and symmetrical third sliding grooves are provided on both sides of the second slot. Symmetrical springs are fitted on the opposite sides of the two third sliding grooves. L-shaped blocks are slidably connected between the inside of the two third sliding grooves and the springs. One end of the opposite side of the two L-shaped blocks protrudes from the inner wall of the second slot.

[0009] Preferably, the lightning protection power-off device includes a lightning protection device, a power-off mechanism, and an installation assembly. The power-off mechanism is inserted into the center of the upper end of the lightning protection device, and the installation assembly is assembled at the bottom of the lightning protection device. The lightning protection device can protect against lightning strikes, the power-off mechanism can cut off the power during a lightning strike, and the installation assembly facilitates installation.

[0010] Preferably, the lightning protection device includes a transformer. A top plate is fixedly connected to the upper end of the transformer, and a bottom plate is fixedly connected to the bottom of the transformer. Multiple connectors are movably connected to the upper end of the top plate, and symmetrical connecting plates are slidably connected between the multiple connectors. Each connecting plate is provided with an insulating part and a conductive part connected in sequence. A lightning rod is provided above the space between the two connecting plates, and a conductive plate is fixedly connected to the bottom of the lightning rod. Symmetrical heat dissipation racks are movably connected to the front and rear sides of the transformer. The bottom plate allows it to be installed on the upper end of the mounting assembly. The lightning rod can transmit lightning to the ground through the conductive plate. The insulating part, in conjunction with the power-off mechanism, can achieve power-off protection. The insulating part is inserted into the interior of the first slot, each connector protrudes from the through hole, the lightning rod protrudes from the interior of the mounting hole, and the conductive plate protrudes from the back of the second slot.

[0011] Preferably, the power-off mechanism includes an insulating plug, with a frame fixedly connected to one end of the insulating plug near the back side. A copper block is slidably connected inside the frame. An insulating handle is fixedly connected to the front side of the insulating plug, and symmetrical second slots are provided on the two side walls of the insulating plug near the insulating handle. The insulating plug is inserted into the second slot on the front side, and the insulating handle, in conjunction with the L-shaped blocks on both sides, is inserted into the second slot for limiting the movement. When the copper block is struck by lightning, the conductive plate is heated, causing the copper block inside to expand along the frame and slide the connecting plates on both sides to the sides, thereby cutting off the power.

[0012] Preferably, the mounting assembly includes a tray, an insulated handle fixedly connected to the front of the tray, a steel wire rope connected to the back of the tray, the steel wire rope being wound around a take-up roller, symmetrical rotating blocks fixedly connected to both ends of the take-up roller, symmetrical internal hexagonal grooves provided on the opposite sides of the rotating blocks, fixing bolts contacting the outer wall of the rotating blocks near the back, symmetrical first sliders fixedly connected to both sides of the tray, symmetrical second sliders fixedly connected to the bottom of the tray, multiple rollers rotatably connected to the second sliders near the bottom of the tray, and symmetrical limiting blocks fixedly connected to the ends of the second sliders near the pull handle; the upper end of the tray is used to place a transformer, the rotating blocks are rotatably connected to the insertion hole, the fixing bolts are threadedly connected to the threaded hole, the second sliders are slidably connected to the first groove, the limiting blocks are inserted into the interior of the first slots on both sides, and the first sliders on both sides are slidably connected to the second groove.

[0013] Preferably, the rotating block is rotatably connected to the insertion hole, the fixing bolt is threadedly connected to the threaded hole, the second slider is slidably connected to the first slide groove, the limiting block is inserted into the inside of the first slots on both sides, and the first sliders on both sides are slidably connected to the second slide groove.

[0014] Preferably, the tray is inserted into the socket on the front, the upper end of the frame is installed opposite to the bottom of the lightning rod, the conductive plate is inserted into the soil, and the connecting plate is slidably connected to the inside of the first slots on both sides.

[0015] Beneficial effects Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In this invention, when struck by lightning, the lightning enters the interior of the conductive plate through the lightning rod and is transmitted to the soil. When struck by lightning, the bottom of the lightning rod heats up and the copper block is heated and expanded by the frame. The copper block expands along the frame to both sides and slides the connecting plates on both sides to the sides so that the insulating part contacts the connector. At this time, the power can be automatically cut off to protect the transformer and the circuit. During maintenance, the power supply can be restored simply by pushing the connecting plates on both sides from the first slot on both sides inward. This provides better protection for the transformer.

[0016] (2) In this invention, when the transformer is installed inside the housing assembly, open the triangular door on the front, loosen the fixing bolts on both sides, grasp the pull handle and pull it outward. The first slider, the second slider and the bottom roller contact the ground and rotate to pull it to the outside. After placing the transformer on the upper end of the tray, use an electric screwdriver to insert into the internal hexagonal slots on both sides and rotate it to drive the winding roller to rotate and wind the steel wire rope to pull the tray inward. After the installation is completed, rotate the fixing bolts on both sides and tighten them to fix the internal hexagonal slots, thereby making the installation more convenient.

[0017] (3) In this invention, the power-off mechanism can be disassembled and installed by bending the L-shaped blocks to both sides and compressing the springs on both sides, which makes it easy to replace during maintenance.

[0018] (4) In this invention, the shape of the triangular gates on both sides can effectively guide rainwater, and the ventilation grooves can discharge the internal heat from the bottom of the triangular gates, so that water will not enter when dissipating heat. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a transformer lightning strike protection device according to the present invention; Figure 2 This is a schematic diagram of the outer shell assembly structure in this invention; Figure 3 This is an enlarged structural diagram of point A in this invention; Figure 4 This is a schematic diagram of the lightning protection power-off device in this invention; Figure 5 This is a schematic diagram of the lightning protection device in this invention; Figure 6 This is a schematic diagram of the power interruption mechanism of the present invention; Figure 7 This is a schematic diagram of the mounting assembly structure in this invention; Figure 8 This is a schematic diagram of the bottom structure of the mounting assembly in this invention.

[0020] The correspondence between the labels and component names in the attached figures is as follows: 1. Housing assembly; 11. Housing; 12. Through hole; 13. Mounting hole; 14. First slot; 15. Insertion hole; 16. Threaded hole; 17. First slide groove; 18. First retaining groove; 19. Second slide groove; 110. Locking hole; 111. Triangular door; 112. Ventilation groove; 113. Third slide; 114. Spring; 115. Second slot; 116. L-shaped card block; 2. Lightning protection and power-off device; 21. Lightning protection device; 211. Transformer; 212. Heat sink; 213. Base plate; 214. Conductive plate; 215. Top plate; 216. Connecting plate; 217. Insulating part; 218. Conductive part; 219. Connector; 2110. Lightning rod; 22. Power-off mechanism; 221. Insulating plug; 222. Second slot; 223. Insulating handle; 224. Frame; 225. Copper block; 23. Mounting assembly; 231. Support plate; 232. First slider; 233. Pull-out handle; 234. Wire rope; 235. Take-up roller; 236. Rotating block; 237. Socket hexagonal groove; 238. Fixing bolt; 239. Second slider; 2310. Roller; 2311. Limit block. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 like Figure 1 As shown, it is a schematic diagram of a transformer lightning strike protection device according to a preferred embodiment of the present invention. The transformer lightning strike protection device of this embodiment includes a housing assembly 1 and a lightning strike protection device 2. The lightning strike protection device 2 is assembled inside the housing assembly 1 and its upper end penetrates the top of the housing assembly 1.

[0023] like Figure 2As shown, this is a schematic diagram of the outer shell assembly structure in this invention. The outer shell assembly 1 includes a shell 11. Symmetrical triangular doors 111 are rotatably connected to the front and rear sides of the shell 11. Ventilation grooves 112 are provided on the opposite surfaces and bottom of the two sides of the shell 11, and the triangular doors 111 and the ventilation grooves 112 are interconnected. A mounting hole 13 is provided at the center of the upper end of the shell 11. Multiple through holes 12 are provided on both sides of the mounting hole 13. A first slot 14 is provided on the outer wall of the shell 11 near the mounting hole 13. The first slot 14 penetrates the center of the through holes 12 and the mounting hole 13 and protrudes from the other side of the shell 11. Symmetrical lock holes 110 are provided on the front and rear sides of the shell 11. On the left and right sides of the shell 11 near the bottom of the back, The housing 11 is equipped with symmetrical insertion holes 15, and threaded holes 16 are provided inside the insertion holes 15 on both sides near the back. The bottom inner side of the housing 11 is provided with symmetrical first sliding grooves 17. Symmetrical first slots 18 are provided on both sides of each first sliding groove 17 near the front of the housing 11. Symmetrical second sliding grooves 19 are provided on the inner two walls of the housing 11 near the bottom. The housing 11 is locked by locking the lock hole 110 in conjunction with the triangular door 111. The housing 11 is used for mounting the lightning protection power-off device 2 through the interior, through hole 12 and mounting hole 13. The heat of the lightning protection power-off device 2 can be blown out through the ventilation groove 112 at the bottom of the housing 11 through the ventilation groove 112. The triangular door 111 provides effective rain protection.

[0024] like Figure 3 As shown, it is an enlarged structural schematic diagram of point A in the present invention. A second slot 115 is provided on the front of the housing 11 near the upper end. Symmetrical third sliding grooves 113 are provided on both sides of the second slot 115. Symmetrical springs 114 are assembled on the opposite sides of the third sliding grooves 113. L-shaped blocks 116 are slidably connected between the inside of the third sliding grooves 113 and the springs 114. One end of the opposite side of the L-shaped blocks 116 protrudes from the inner wall of the second slot 115.

[0025] like Figure 4 As shown, this is a schematic diagram of the lightning protection and power-off device structure of the present invention. The lightning protection and power-off device 2 includes a lightning protection device 21, a power-off mechanism 22, and a mounting assembly 23. The power-off mechanism 22 is inserted into the center of the upper end of the lightning protection device 21, and the mounting assembly 23 is assembled on the bottom of the lightning protection device 21. The lightning protection device 21 can protect against lightning strikes, the power-off mechanism 22 can cut off the power during a lightning strike, and the mounting assembly 23 facilitates installation.

[0026] like Figure 5As shown, this is a schematic diagram of the lightning protection device structure of the present invention. The lightning protection device 21 includes a transformer 211. A top plate 215 is fixedly connected to the upper end of the transformer 211, and a bottom plate 213 is fixedly connected to the bottom of the transformer 211. Multiple connectors 219 are movably connected to the upper end of the top plate 215. Symmetrical connecting plates 216 are slidably connected between the multiple connectors 219. Each connecting plate 216 is provided with an insulating part 217 and a conductive part 218 connected in sequence. A lightning rod 2110 is provided above the space between the two connecting plates 216. A conductive plate 214 is fixedly connected to the bottom of the transformer 211, and symmetrical heat sinks 212 are movably connected to the front and rear sides of the transformer 211. The transformer 211 can be installed on the upper end of the mounting assembly 23 through the base plate 213. The lightning rod 2110 can transmit lightning to the ground through the conductive plate 214. The insulation part 217 can cooperate with the power-off mechanism 22 to achieve power-off protection. The insulation part 217 is inserted into the interior of the first slot 14. Each connector 219 protrudes from the through hole 12. The lightning rod 2110 protrudes from the interior of the mounting hole 13. The conductive plate 214 protrudes from the back of the second slot 115.

[0027] like Figure 6 As shown, this is a schematic diagram of the power-off mechanism structure of the present invention. The power-off mechanism 22 includes an insulating plug 221. A frame 224 is fixedly connected to one end of the insulating plug 221 near the back. A copper block 225 is slidably connected inside the frame 224. An insulating handle 223 is fixedly connected to the front of the insulating plug 221. Symmetrical second slots 222 are provided on the two side walls of the insulating plug 221 near the insulating handle 223. The insulating plug 221 is inserted into the second slot 115 on the front. The insulating handle 223 cooperates with the L-shaped blocks 116 on both sides to be inserted into the second slot 222 for limiting. When the conductive plate 214 is heated during a lightning strike, the copper block 225 inside is heated and expands along the frame 224, causing the connecting plates 216 on both sides to slide to both sides, thereby cutting off the power.

[0028] like Figure 7-8As shown, this is a schematic diagram of the mounting assembly structure in this invention. The mounting assembly 23 includes a support plate 231. An insulated handle 223 is fixedly connected to the front of the support plate 231. A steel wire rope 234 is connected to the back of the support plate 231. The steel wire rope 234 is wound around a take-up roller 235. Symmetrical rotating blocks 236 are fixedly connected to both ends of the take-up roller 235. Symmetrical internal hexagonal grooves 237 are provided on the opposite sides of the rotating blocks 236. Fixing bolts 238 are in contact with the outer wall of the rotating blocks 236 near the back. Symmetrical first sliders 232 are fixedly connected to both sides of the support plate 231. The bottom of the support plate 231 is fixedly... The two sides of the second slider 239 are symmetrically connected. Multiple rollers 2310 are rotatably connected to the bottom of the second slider 239 near the support plate 231. Symmetrical limiting blocks 2311 are fixedly connected to the two ends of the second slider 239 near the pull handle 233. The upper end of the support plate 231 is used to place the transformer 211. The rotating block 236 is rotatably connected to the insertion hole 15. The fixing bolt 238 is threadedly connected to the threaded hole 16. The second slider 239 is slidably connected to the first slide groove 17. The limiting blocks 2311 are inserted into the inside of the first slots 18 on both sides. The first sliders 232 on both sides are slidably connected to the second slide groove 19.

[0029] The rotating block 236 is rotatably connected to the insertion hole 15, the fixing bolt 238 is threadedly connected to the threaded hole 16, the second slider 239 is slidably connected to the first slide groove 17, the limiting block 2311 is inserted into the inside of the first slots 18 on both sides, and the first sliders 232 on both sides are slidably connected to the second slide groove 19.

[0030] The tray 231 is inserted into the socket 15 on the front, the upper end of the frame 224 is installed opposite to the bottom of the lightning rod 2110, the conductive plate 214 is inserted into the soil, and the connecting plate 216 is slidably connected to the inside of the first slots 14 on both sides.

[0031] Working principle: When struck by lightning, the lightning enters the interior of the conductive plate 214 through the lightning rod 2110 and is transmitted into the soil. When struck by lightning, the bottom of the lightning rod 2110 heats up and the copper block 225 is heated and expanded by the frame 224. The copper block 225 expands to both sides along the frame 224, causing the connecting plates 216 on both sides to slide to both sides, so that the insulating part 217 contacts the connector 219. At this time, the power can be automatically cut off, protecting the transformer 211 and the circuit. During maintenance, it is only necessary to push the connecting plates 216 on both sides inward from the first slot 14 on both sides to restore the power supply, which can better protect the transformer 211.

[0032] Example 2 like Figure 1-8As shown, this is a schematic diagram of a transformer lightning strike protection device according to another preferred embodiment of the present invention. Based on Embodiment 1, this embodiment of the transformer lightning strike protection device, when the transformer 211 is installed inside the housing assembly 1, opens the triangular door 111 on the front, loosens the fixing bolts 238 on both sides, grasps the pull handle 233 and pulls it outward. The first slider 232, the second slider 239, and the bottom roller 2310 contact the ground and rotate to pull it to the outside. After placing the transformer 211 on the upper end of the support plate 231, an electric screwdriver is inserted into the internal hexagonal slots 237 on both sides and rotated, driving the winding roller 235 to rotate and winding the steel wire rope 234 to pull the support plate 231 inward. After installation, the fixing bolts 238 on both sides are rotated and tightened to fix the internal hexagonal slots 237, thus making installation more convenient.

[0033] Example 3 like Figure 1-8 As shown, it is a schematic diagram of a transformer lightning strike power-off protection device according to another preferred embodiment of the present invention. Based on embodiments 1 and 2, the transformer lightning strike power-off protection device of this embodiment can disassemble and install the power-off mechanism 22 by bending the L-shaped locking block 116 to both sides and compressing the springs 114 on both sides, which can facilitate replacement during maintenance.

[0034] Example 4 like Figure 1-8 As shown, it is a schematic diagram of a transformer lightning strike protection device according to another preferred embodiment of the present invention. Based on embodiments 1, 2 and 3, the transformer lightning strike protection device of this embodiment can effectively guide rainwater through the shape of the triangular gates 111 on both sides, and can exhaust internal heat from the bottom of the triangular gates 111 through the ventilation grooves 112, so that water will not enter during heat dissipation.

[0035] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A transformer lightning strike protection device, comprising a housing assembly (1), wherein a lightning strike protection device (2) is installed inside the housing assembly (1) and the upper end of the lightning strike protection device (2) penetrates the top of the housing assembly (1), characterized in that: The lightning protection power-off device (2) includes a lightning protection device (21), a power-off mechanism (22) is horizontally inserted at the center of the upper end of the lightning protection device (21), and an installation assembly (23) is assembled at the bottom of the lightning protection device (21); the lightning protection device (21) includes a transformer (211), a top plate (215) is fixedly connected to the upper end of the transformer (211) and a bottom plate (213) is fixedly connected to the bottom, a plurality of connectors (219) are movably connected to the upper end of the top plate (215), symmetrical connecting plates (216) are slidably connected between the plurality of connectors (219), each connecting plate (216) is provided with an insulating part (217) and a conductive part (218) connected in sequence, and a lightning rod (2110) is provided above the connection between the two connecting plates (216). A conductive plate (214) is fixedly connected to the bottom of the lightning rod (2110), and symmetrical heat sinks (212) are movably connected to the front and rear sides of the transformer (211). The power-off mechanism (22) includes an insulating plug (221). A frame (224) is fixedly connected to one end of the insulating plug (221) near the back. A copper block (225) is slidably connected inside the frame (224). An insulating handle (223) is fixedly connected to the front of the insulating plug (221), and symmetrical second slots (222) are provided on the two side walls near the insulating handle (223). The upper end of the frame (224) is installed opposite to the bottom of the lightning rod (2110). The conductive plate (214) is inserted into the soil, and the connecting plate (216) is slidably connected inside the first slots (14) on both sides.

2. The transformer lightning strike protection device according to claim 1, characterized in that: The mounting assembly (23) includes a tray (231), on the front of which a pull handle (233) is fixedly connected and on the back of which a wire rope (234) is connected. The wire rope (234) is wound around a take-up roller (235). Symmetrical rotating blocks (236) are fixedly connected to both ends of the take-up roller (235). Symmetrical internal hexagonal grooves (237) are provided on the opposite sides of the rotating blocks (236) and are close to the outer wall of the back. The upper contact is fixed with a bolt (238), the two sides of the support plate (231) are fixedly connected with symmetrical first sliders (232), and the bottom is fixedly connected with symmetrical second sliders (239). The two sides of the second sliders (239) are rotatably connected with multiple rollers (2310) near the bottom of the support plate (231), and the two sides of the second sliders (239) near the pull handle (233) are fixedly connected with symmetrical limit blocks (2311).

3. The transformer lightning strike protection device according to claim 2, characterized in that: The outer casing assembly (1) includes a housing (11). Symmetrical triangular doors (111) are rotatably connected to the front and rear sides of the housing (11), and ventilation grooves (112) are provided on the opposite sides and the bottom. The triangular doors (111) and ventilation grooves (112) are interconnected. A mounting hole (13) is provided at the center of the upper end of the housing (11). Multiple through holes (12) are provided on both sides of the mounting hole (13). A first slot (14) is provided on the outer wall of the housing (11) near the mounting hole (13). The first slot (14) penetrates the through hole (12) and the mounting hole (13) from one side of the housing (11). The center of the housing (11) is exposed from the other side of the housing (11). The front and rear sides of the housing (11) are provided with symmetrical lock holes (110) and the left and right sides are provided with symmetrical insertion holes (15) near the bottom of the back. The insertion holes (15) on both sides are provided with threaded holes (16) near the back. The bottom of the inner side of the housing (11) is provided with symmetrical first sliding grooves (17). The two sides of each first sliding groove (17) are provided with symmetrical first slots (18) near the front of the housing (11). The two inner walls of the housing (11) are provided with symmetrical second sliding grooves (19) near the bottom.

4. The transformer lightning strike protection device according to claim 3, characterized in that: The housing (11) has a second slot (115) on the front near the top. The second slot (115) has symmetrical third slides (113) on both sides. Symmetrical springs (114) are fitted on the opposite sides of the third slides (113) and L-shaped blocks (116) are slidably connected between the L-shaped blocks (116) and the springs (114). One end of the opposite side of the L-shaped blocks (116) protrudes from the inner wall of the second slot (115).

5. A transformer lightning strike protection device according to claim 4, characterized in that: The rotating block (236) is rotatably connected to the insertion hole (15), the fixing bolt (238) is threadedly connected to the threaded hole (16), the second slider (239) is slidably connected to the first slide groove (17), the limiting block (2311) is inserted into the inside of the first slots (18) on both sides, and the first sliders (232) on both sides are slidably connected to the second slide groove (19).

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