A lightning protection device for a transformer

Abstract

The present invention discloses a lightning protection device for a transformer, which relates to the technical field of transformer lightning protection. The present invention includes a bottom plate, the middle part of the upper end surface of the bottom plate is fixedly connected with a transformer, a lightning protection cage is fixedly connected at the rear of the upper end surface of the bottom plate, a connection structure is fixedly connected to the outside of the lower end surface of the bottom plate, side lightning protection structures are arranged on the left and right sides of the inner cavity of the connection structure, a front-end lightning protection structure is arranged at the front part of the inner cavity of the connection structure, a fixing structure is arranged in the middle of the front end surface of the lightning protection cage, turning drive structures are symmetrically arranged in the middle of the lower end surface of the bottom plate, and a drive structure is arranged between the two turning drive structures on the lower end surface of the bottom plate. Through the Faraday cage structure formed by the lightning protection cage, the side lightning protection structures and the front-end lightning protection structures, during lightning strikes, by using the electrostatic shielding and charge shielding effects, the influence of the external electric field is neutralized, and a region with an extremely low or even almost zero electric field intensity is formed inside the cage body, thereby effectively preventing the transformer from being struck by lightning and ensuring the safety of the transformer.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning protection for transformers, and particularly to a lightning protection device for transformers. Background Art

[0002] A transformer is a static electrical device used to transform AC voltage and current and transmit AC electrical energy. It realizes the transmission of electrical energy based on the principle of electromagnetic induction. Transformers can be classified into power transformers, test transformers, instrument transformers, and transformers for special purposes according to their uses: Power transformers are essential equipment for power transmission and distribution and power user distribution; Test transformers are equipment for performing withstand voltage (boost voltage) tests on electrical equipment; Instrument transformers are used for electrical measurement and relay protection in the power distribution system (PT, CT); Transformers for special purposes include electric furnace transformers for smelting, welding transformers, rectifier transformers for electrolysis, small voltage regulating transformers, etc.

[0003] After retrieval, a Chinese invention patent discloses a lightning protection device for a transformer with a publication number of CN115020090B, which specifically includes: a positioning plate having a rectangular structure, and an insulating block provided at the bottom of the positioning plate. The top of the insulating block is fixedly connected to the bottom of the positioning plate, and the bottom of the insulating block is fixedly connected to the transformer housing; a water storage tank having a triangular structure, and a support device provided inside the water storage tank. The top of the support device penetrates through the water storage tank and is fixedly connected to a lightning protection device. A water storage hole is provided on the side of the top of the water storage tank, and the bottom of the water storage tank is fixedly connected to the top of the positioning plate. The present invention relates to the technical field of transformers. This lightning protection device for a transformer can conveniently prevent the charges in the clouds from forming lightning and hitting the transformer, and when lightning accidentally hits, it can prevent the lightning current from affecting the transformer and the power supply line, with good safety, and can prevent the lightning protection device from shaking driven by the wind, with good stability.

[0004] When the existing lightning protection device needs to repair the transformer, it often requires manual removal of the entire lightning protection device or complex disassembly operations, which not only takes time and effort but also increases the operation risk. At the same time, the existing lightning protection device only focuses on the lightning protection effect and ignores electromagnetic shielding, or it is difficult to achieve good lightning protection and electromagnetic shielding effects simultaneously.

[0005] Therefore, the existing lightning protection device for transformers cannot meet the requirements in actual use, so there is an urgent need for improved technology on the market to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a lightning protection device for transformers, which solves the problems raised in the above background art through the following settings.

[0007] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0008] The present invention relates to a lightning protection device for a transformer, which includes a bottom plate. In the middle of the upper end surface of the bottom plate, a transformer is fixedly connected. At the rear of the transformer on the upper end surface of the bottom plate, a lightning protection cage is fixedly connected. On the outer side of the lower end surface of the bottom plate, a connection structure is fixedly connected. On the left and right sides of the inner cavity of the connection structure, side lightning protection structures are arranged. In the front part of the inner cavity of the connection structure, a front-end lightning protection structure is arranged. In the middle of the front end surface of the lightning protection cage, a fixing structure is arranged. On one side of each of the two side lightning protection structures away from the lightning protection cage, a flipping and adjusting structure is arranged. On the left and right sides between the two flipping and adjusting structures, a transmission structure is arranged. Symmetrically arranged in the middle of the lower end surface of the bottom plate are flipping driving structures. Between the two flipping driving structures on the lower end surface of the bottom plate, a driving structure is arranged;

[0009] In the middle of the upper end surface of the bottom plate, a transformer body is fixedly connected, and heat dissipation fins are evenly fixedly connected to the outer surface of the transformer body.

[0010] Preferably, the lightning protection cage includes mounting struts I evenly and fixedly connected to the rear part of the upper end surface of the bottom plate. Between two adjacent mounting struts I, conductive crossbars I are evenly fixedly connected. On the upper end surface of the mounting struts I, a mounting crossbar is fixedly connected. In the inner cavity of the mounting crossbar, conductive crossbars I are evenly fixedly connected. On the front end surface of the mounting crossbar, a fixing structure is arranged. In the middle of the left and right side end faces of the mounting crossbar, card slots are respectively formed.

[0011] Preferably, the connection structure includes connection columns fixedly connected to the four corners of the lower end surface of the bottom plate. At a corner of the upper end surface of the connection column away from the bottom plate, a connection block is fixedly connected. Between two longitudinal connection blocks, a longitudinal rotating shaft is rotatably connected. Between two transverse connection blocks, a transverse rotating shaft is rotatably connected.

[0012] Preferably, the side lightning protection structure includes side connection columns evenly and fixedly connected to the outer surface of the longitudinal rotating shaft. On the upper end surface of the side connection columns, side crossbars are fixedly connected. Between two adjacent side connection columns, side conductive bars are evenly fixedly connected. Between the two side crossbars, blocks that are mutually matched with the card slots on the mounting crossbar are respectively fixedly connected.

[0013] Preferably, the front-end lightning protection structure includes front-end support rods evenly and fixedly connected to the outer surface of the transverse rotating shaft. On the upper end surface of the front-end support rods, front-end crossbars are fixedly connected. Between two adjacent front-end crossbars, front-end conductive crossbars are evenly fixedly connected. In the middle of the front end surface of the front-end crossbar, a pulling handle is fixedly connected.

[0014] Preferably, the fixing structure includes a fixed claw fixedly connected to the middle part of the rear end face of the front cross bar, a limit slot is provided in the middle part of the front end face of the mounting cross bar, a limit structure is provided in the inner cavity of the limit slot, the fixed claw is clamped in the inner cavity of the limit slot, and a limit slide is provided in the middle part of the upper end face of the limit slot. The limiting structure includes a limit card plate slidably connected to the inner cavity of the limit slide, the upper end face of the fixed claw is provided with a groove matching the limit card plate, the upper end face of the limit card plate is fixedly connected with a lifting plate, and the left and right sides of the lower end face of the lifting plate are respectively connected with springs.

[0015] Preferably, the flip adjustment structure includes a flip rod symmetrically fixedly connected to the side of the side connecting column away from the base plate, an adjustment shaft is rotatably connected between the two flip rods, an adjustment connecting rod is evenly fixedly connected to the outer surface of the adjustment shaft, and a transmission structure is provided at the end of the adjustment connecting rod away from the adjustment shaft.

[0016] Preferably, the transmission structure is rotatably connected to the transmission shaft at one end of the two adjacent adjustment links away from the adjustment shaft, a transmission block is fixedly connected to the middle of the outer surface of the transmission shaft, the transmission block is fixedly connected to the end away from the transmission shaft with a transmission plate, and a flip driving structure is provided on the lower end surface of the base plate located between the two transmission plates.

[0017] Preferably, the flipping drive structure includes a rotating frame symmetrically fixedly connected to the lower end surface of the base plate, a threaded sleeve is rotatably connected to the inner cavity of the rotating frame, and a threaded rod is symmetrically threadedly connected to the inner cavity of the threaded sleeve. The ends of the two threaded rods away from the threaded sleeve are respectively fixedly connected to the transmission plates on both sides of the threaded sleeve, and a driving structure is provided on the lower end surface of the base plate between the two threaded sleeves.

[0018] Preferably, the driving structure includes a transmission gear fixedly connected to the middle part of the outer surface of the two threaded sleeves, the outer surfaces of the two transmission gears are connected with a toothed belt, the middle part of the inner cavity of the toothed belt is meshed with a driving gear, the middle part of the lower end surface of the base plate is fixedly connected with a driving motor, and the output end of the driving motor is fixedly connected to the driving gear.

[0019] The present invention has the following beneficial effects:

[0020] 1. The present invention uses a Faraday cage structure composed of a lightning protection cage, a side lightning protection structure, and a front lightning protection structure. When a lightning strikes, the Faraday cage structure utilizes electrostatic shielding and charge shielding effects to neutralize the influence of the external electric field, forming an area inside the cage with extremely low or even close to zero electric field strength, thereby effectively protecting the transformer from lightning strikes and ensuring the safety of the transformer. At the same time, the setting of the Faraday cage not only provides lightning protection, but also realizes electromagnetic shielding for the transformer, reducing the influence of external electromagnetic interference on the operation of the transformer, so that the transformer can operate safely and stably.

[0021] 2. By starting the driving structure of the present invention, the left and right sides of the lightning protection cage can be opened, which facilitates personnel to perform maintenance on the transformer when maintenance is required, improving work efficiency and safety. Furthermore, by pulling or pushing the pulling handle in the reverse direction, the separation or tight fitting and fixing of the front-end lightning protection structure and the lightning protection cage can be conveniently achieved, further enhancing the flexibility and operability of the device. Through the forward and reverse rotation control of the driving motor, the automatic closing and opening of the left and right sides of the lightning protection cage can be realized without manual operation, improving the automation degree and convenience of the device. At the same time, since the driving motor is a variable-frequency bidirectional motor, it can limit the rotating flipping driving structure to ensure the stability of the lightning protection cage in the closed or open state, preventing accidental movement or damage of the device due to external forces and other factors.

[0022] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings without creative efforts based on these drawings.

[0024] Figure 1 It is a front view three-dimensional structure schematic diagram of the present invention;

[0025] Figure 2 It is a bottom view three-dimensional structure schematic diagram of the present invention;

[0026] Figure 3 It is a longitudinal half-sectional structure schematic diagram of the present invention;

[0027] Figure 4 It is a transverse half-sectional structure schematic diagram of the present invention;

[0028] Figure 5 It is the present invention Figure 2 The enlarged structure schematic diagram of area A in;

[0029] Figure 6 It is the present invention Figure 3 The enlarged structure schematic diagram of area B in.

[0030] In the drawings, the list of components represented by each reference numeral is as follows:

[0031] 1. Base plate; 2. Transformer; 21. Transformer body; 22. Heat sink; 3. Lightning protection cage; 31. Installation support one; 32. Conductive cross bar one; 33. Installation cross bar; 4. Connection structure; 41. Connection column; 42. Connection block; 43. Longitudinal rotating shaft; 44. Transverse rotating shaft; 5. Side lightning protection structure; 51. Side connection column; 52. Side cross bar; 53. Side conductive bar; 54. Clamping block; 6. Front end lightning protection structure; 61. Front end support rod; 62. Front end cross bar; 63. Front end conductive cross bar; 64. Pulling handle; 7. Fixing structure; 71. Fixing claw; 72. Limit card slot; 73. Limiting structure; 731. Limit card plate; 732. Lifting plate; 733. Spring; 8. Flipping and adjusting structure; 81. Flipping rod; 82. Adjusting shaft; 83. Adjusting connecting rod; 9. Transmission structure; 91. Transmission shaft; 92. Transmission block; 93. Transmission plate; 10. Flipping driving structure; 101. Rotating frame; 102. Threaded sleeve; 103. Threaded rod; 11. Driving structure; 111. Transmission gear; 112. Tooth belt; 113. Driving gear; 1114. Driving motor. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] Please refer to Figures 1-6 As shown in the figure, this embodiment is a lightning protection device for a transformer, including a base plate 1. A transformer 2 is fixedly connected to the middle of the upper end surface of the base plate 1. A lightning protection cage 3 is fixedly connected to the rear of the transformer 2 on the upper end surface of the base plate 1. A connection structure 4 is fixedly connected to the outside of the lower end surface of the base plate 1. Side lightning protection structures 5 are arranged on the left and right sides of the inner cavity of the connection structure 4. A front end lightning protection structure 6 is arranged in the front part of the inner cavity of the connection structure 4. A fixing structure 7 is arranged in the middle of the front end surface of the lightning protection cage 3. Flipping and adjusting structures 8 are arranged on one side of the two side lightning protection structures 5 away from the lightning protection cage 3. Transmission structures 9 are arranged on the left and right sides between the two flipping and adjusting structures 8. Flipping driving structures 10 are symmetrically arranged in the middle of the lower end surface of the base plate 1. A driving structure 11 is arranged between the two flipping driving structures 10 on the lower end surface of the base plate 1;

[0034] A transformer body 21 is fixedly connected to the middle of the upper end surface of the base plate 1. Heat sinks 22 are uniformly fixedly connected to the outer surface of the transformer body 21. Through the transformer 2 on the base plate 1, during use, through the wiring terminals on the base plate 1, it is convenient for personnel to electrically connect external cables to the transformer body 21, and then the heat sinks 22 efficiently dissipate heat from the transformer body 21 when the transformer body 21 is working.

[0035] Further, the lightning protection cage 3 includes mounting struts one 31 fixedly connected to the rear part of the upper end surface of the bottom plate 1 evenly. Between two adjacent mounting struts one 31, there are conductive crossbars one 32 fixedly connected evenly. On the upper end surface of the mounting strut one 31, there is a mounting crossbar 33 fixedly connected. Inside the cavity of the mounting crossbar 33, there are conductive crossbars one 32 fixedly connected evenly. On the front end surface of the mounting crossbar 33, there is a fixing structure 7 arranged. In the middle of the left and right side end surfaces of the mounting crossbar 33, there are slots opened respectively. Through the lightning protection cage 3 on the bottom plate 1, during use, the fixing structure 7 is installed and placed. Furthermore, through the mounting strut one 31 and the mounting crossbar 33, the upper part and the rear part of the transformer 2 are protected by the housing.

[0036] Further, the connection structure 4 includes connection columns 41 fixedly connected to the four corners of the lower end surface of the bottom plate 1. At the corner of the upper end surface of the connection column 41 far away from the bottom plate 1, there is a connection block 42 fixedly connected. Between two longitudinal connection blocks 42, there is a longitudinal rotating shaft 43 rotatably connected. Between two transverse connection blocks 42, there is a transverse rotating shaft 44 rotatably connected. Through the connection structure 4 on the bottom plate 1, during use, it is convenient for personnel to install the whole equipment and the side lightning protection structure 5 and the front-end lightning protection structure 6. Furthermore, through the longitudinal rotating shaft 43 and the transverse rotating shaft 44, the side lightning protection structure 5 and the front-end lightning protection structure 6 can rotate stably.

[0037] Further, the side lightning protection structure 5 includes side connection columns 51 fixedly connected to the outer surface of the longitudinal rotating shaft 43 evenly. On the upper end surface of the side connection column 51, there is a side crossbar 52 fixedly connected. Between two adjacent side connection columns 51, there are side conductive rods 53 fixedly connected evenly. Between the two side crossbars 52, there are respectively fixing blocks fixedly connected that are mutually matched with the slots on the mounting crossbar 33. Through the side lightning protection structure 5 on the connection structure 4, during use, the left and right sides of the lightning protection cage 3 are closed. Furthermore, through the side connection column 51, the flipping and adjusting structure 8 is installed and placed. Furthermore, through the rotation of the side connection column 51, it is convenient for personnel to perform maintenance and repair on both sides of the transformer 2.

[0038] Further, the front-end lightning protection structure 6 includes front-end support rods 61 fixedly connected to the outer surface of the transverse rotating shaft 44 evenly. On the upper end surface of the front-end support rod 61, there is a front-end crossbar 62 fixedly connected. Between two adjacent front-end crossbars 62, there are front-end conductive crossbars 63 fixedly connected evenly. In the middle of the front end surface of the front-end crossbar 62, there is a pulling handle 64 fixedly connected. Through the front-end lightning protection structure 6 on the connection structure 4, during use, through the front-end support rod 61 and the front-end crossbar 62, the front end of the transformer 2 is closed and protected. Furthermore, through the mutual cooperation of the side lightning protection structure 5 and the lightning protection cage 3, a Faraday cage is formed outside the transformer 2, thereby providing lightning strike protection for the transformer 2 during thunderstorm weather.

[0039] Further, the fixing structure 7 includes a fixing claw 71 fixedly connected to the middle of the rear end face of the front cross bar 62. A limiting groove 72 is provided in the middle of the front end face of the mounting cross bar 33. A limiting structure 73 is arranged in the inner cavity of the limiting groove 72. The fixing claw 71 is clamped in the inner cavity of the limiting groove 72. A limiting sliding groove is provided in the middle of the upper end face of the limiting groove 72. The limiting structure 73 includes a limiting clamping plate 731 slidably connected in the inner cavity of the limiting sliding groove. A groove matching the limiting clamping plate 731 is provided on the upper end face of the fixing claw 71. A lifting plate 732 is fixedly connected to the upper end face of the limiting clamping plate 731. Spring 733 is respectively connected between the left and right sides of the lower end face of the lifting plate 732 and the mounting cross bar 33. Through the fixing structure 7 on the lightning protection cage 3, the closed front lightning protection structure 6 is fixedly connected during use, so that the lightning protection cage 3 and the front lightning protection structure 6 form a whole, enabling electrons to move freely in the lightning protection cage 3, the side lightning protection structure 5, and the front lightning protection structure 6. Furthermore, the fixing claw 71 clamped with the limiting groove 72 is limited by the clamping of the limiting structure 73, thus realizing the limiting and fixing of the upwardly rotating front lightning protection structure 6.

[0040] Further, the flipping and adjusting structure 8 includes flipping rods 81 symmetrically and fixedly connected to the side connection columns 51 away from the bottom plate 1. An adjusting shaft 82 is rotatably connected between the two flipping rods 81. Adjusting connecting rods 83 are uniformly fixedly connected to the outer surface of the adjusting shaft 82. A transmission structure 9 is arranged at one end of the adjusting connecting rod 83 away from the adjusting shaft 82. Through the flipping and adjusting structure 8 on the side lightning protection structure 5, the driving wheel of the flipping driving structure 10 is converted into a pushing and pulling force on the connecting structure 4 during work. Furthermore, through the mutual movement of the adjusting connecting rods 83, the movement directions of the flipping rods 81 and the side lightning protection structure 5 are adjusted.

[0041] Further, the transmission structure 9 is rotatably connected to a transmission shaft 91 at one end of two adjacent adjusting connecting rods 83 away from the adjusting shaft 82. A transmission block 92 is fixedly connected to the middle of the outer surface of the transmission shaft 91. A transmission plate 93 is fixedly connected to one end of the transmission block 92 away from the transmission shaft 91. A flipping driving structure 10 is arranged between the two transmission plates 93 on the lower end face of the bottom plate 1. Through the transmission structure 9 on the flipping and adjusting structure 8, power is transmitted to the flipping driving structure 10 during use. Furthermore, since the transmission shaft 91 and the adjusting connecting rod 83 rotate and are connected, it is convenient for the flipping and adjusting structure 8 to change the movement angle of the force.

[0042] Furthermore, the flipping drive structure 10 includes a rotating frame 101 symmetrically fixedly connected to the lower end surface of the base plate 1, and the inner cavity of the rotating frame 101 is rotatably connected to a threaded sleeve 102, and the inner cavity of the threaded sleeve 102 is symmetrically threadedly connected to a threaded rod 103, and the ends of the two threaded rods 103 away from the threaded sleeve 102 are respectively fixedly connected to the transmission plates 93 on both sides of the threaded sleeve 102, and the lower end surface of the base plate 1 is provided with a driving structure 11 between the two threaded sleeves 102. Through the flipping drive structure 10 on the base plate 1, the movement direction of the transmission structure 9 and the flipping adjustment structure 8 is driven and adjusted during use, and then through the rotation of the threaded sleeve 102, the distance between the transmission structure 9 and the flipping adjustment structure 8 is adjusted and controlled, and the flipping adjustment structures 8 on both sides work simultaneously.

[0043] Furthermore, the driving structure 11 includes a transmission gear 111 fixedly connected to the middle of the outer surface of the two threaded sleeves 102, and the outer surfaces of the two transmission gears 111 are transmission-connected with a toothed belt 112, and the middle of the inner cavity of the toothed belt 112 is meshed with a driving gear 113. A driving motor 114 is fixedly connected to the middle of the lower end surface of the base plate 1, and the output end of the driving motor 114 is fixedly connected to the driving gear 113. The rotation of the threaded sleeve 102 is driven during use through the driving structure 11 on the base plate 1, and then the rotation direction of the threaded sleeve 102 is adjusted by the driving motor 114. At the same time, the threaded sleeves 102 on both sides are rotated in the same direction at the same time through the transmission gear 111 and the toothed belt 112.

[0044] Working principle: When working, the device is installed in a suitable position through the connecting column 41. At this time, the personnel connect the cable to the transformer body 21 through the terminal at the rear of the lower end surface of the bottom plate 1.

[0045] When a lightning strike occurs, since the lightning protection structures 5 on both sides are in contact with the lightning protection cage 3, and the front lightning protection structure 6 is in contact with the lightning protection cage 3 through the fixed structure 7, and the lightning protection cage 3, the side lightning protection structure 5, the front lightning protection structure 6 and the fixed structure 7 are all made of metal materials, a Faraday cage structure is formed by the lightning protection cage 3, the side lightning protection structure 5 and the front lightning protection structure 6. Therefore, when a lightning strike occurs, based on the electrostatic shielding and charge shielding effects, the free electrons on the surface of the cage will be redistributed to neutralize the influence of the external electric field, thereby forming an area with extremely low electric field intensity inside the cage, even close to zero, thereby preventing the transformer 2 from being struck by lightning. At the same time, due to the setting of the Faraday cage, electromagnetic shielding of the transformer 2 is achieved, so that the transformer 2 can operate safely and stably.

[0046] However, when the transformer 2 needs to be overhauled, the driving structure 11 is started, causing the output end of the driving motor 114 to rotate. Thus, the driving gear 113 rotates, and then the toothed belt 112 engaged with the driving gear 113 rotates. Further, the transmission gear 111 drivingly connected to the toothed belt 112 rotates. At this time, since the transmission gear 111 is fixedly connected to the middle of the outer surface of the threaded sleeve 102, the threaded sleeve 102 rotates. At this time, since the threaded rod 103 is fixedly connected to the transmission plate 93, the threaded rods 103 approach each other under the limiting action of the transmission plate 93. Therefore, the transmission structure 9 approaches each other. At this time, since the adjusting link 83 is rotationally connected to the transmission structure 9, the lightning protection cage 3 approaches each other, thereby providing a lateral pulling force on the adjusting shaft 82. Therefore, the turning rod 81 rotates downward with the longitudinal rotating shaft 43 as the center. Further, since the turning rod 81 is fixedly connected to the lightning protection structures 5 on both sides, the side lightning protection structures 5 rotate downward with the longitudinal rotating shaft 43 as the center, thereby opening the left and right sides of the lightning protection cage 3, facilitating personnel to overhaul and maintain the transformer 2.

[0047] When the front end of the lightning protection cage 3 needs to be opened, the pulling handle 64 is pulled, causing the front end support rod 61 to rotate downward with the transverse rotating shaft 44 as the center. At the same time, since the fixed claw 71 and the limit card slot 72 are separated from each other, the limit card plate 731 and the lifting plate 732 slide upward, and then the spring 733 elongates. Therefore, the separation of the front-end lightning protection structure 6 from the lightning protection cage 3 is realized.

[0048] Similarly, when a thunderstorm is detected, the pulling handle 64 is pushed backward, causing the front end support rod 61 to rotate upward with the transverse rotating shaft 44 as the center. Therefore, the fixed claw 71 and the limit card slot 72 are engaged with each other. After the fixed claw 71 and the limit card slot 72 are engaged, the spring 733 contracts. Therefore, the height of the lifting plate 732 and the limit card plate 731 decreases. Therefore, the limit card plate 731 is engaged with the groove on the fixed claw 71, tightly fitting and fixing the front-end lightning protection structure 6 and the lightning protection cage 3.

[0049] At the same time, start the drive motor 114, so that the output end of the drive motor 114 rotates in the reverse direction. Therefore, the drive gear 113, the toothed belt 112, the transmission gear 111 and the threaded sleeve 102 rotate in the reverse direction. So, the threaded rods 103 in the inner cavity of the threaded sleeve 102 move away from each other in the opposite direction, thereby pushing the transmission structure 9 away from each other. Since the adjusting link 83 is rotatably connected to the transmission shaft 91, the adjusting links 83 move away from each other. Therefore, a thrust in the opposite direction in the horizontal direction is provided to the turning rod 81. At this time, since the turning rod 81 is rotatably connected to the longitudinal rotating shaft 43 through the side connecting column 51, the thrust in the horizontal direction of the adjusting link 83 is converted into an upward thrust. So, the front lightning protection structure 6 rotates upward with the longitudinal rotating shaft 43 as the center, so that the front lightning protection structure 6 fits with the left and right sides of the lightning protection cage 3. Therefore, the left and right sides of the lightning protection cage 3 are closed. At the same time, since the drive motor 114 is a variable-frequency bidirectional motor, the rotated turning drive structure 10 is limited.

[0050] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0051] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0052] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lightning protection device for a transformer, comprising a bottom plate (1), characterized in that; In the middle of the upper end face of the bottom plate (1), a transformer (2) is fixedly connected. At the rear of the transformer (2) on the upper end face of the bottom plate (1), a lightning protection cage (3) is fixedly connected. On the outer side of the lower end face of the bottom plate (1), a connection structure (4) is fixedly connected. On the left and right sides inside the cavity of the connection structure (4), side lightning protection structures (5) are arranged. In the front part of the cavity of the connection structure (4), a front-end lightning protection structure (6) is arranged. In the middle of the front end face of the lightning protection cage (3), a fixing structure (7) is arranged. On one side of each of the two side lightning protection structures (5) away from the lightning protection cage (3), a flipping and adjusting structure (8) is arranged. On the left and right sides between the two flipping and adjusting structures (8), a transmission structure (9) is arranged. Symmetrically arranged in the middle of the lower end face of the bottom plate (1) are flipping driving structures (10). Between the two flipping driving structures (10) on the lower end face of the bottom plate (1), a driving structure (11) is arranged; In the middle of the upper end face of the bottom plate (1), a transformer body (21) is fixedly connected. Heat dissipation fins (22) are evenly fixedly connected to the outer surface of the transformer body (21). The flipping and adjusting structure (8) includes flipping rods (81) symmetrically and fixedly connected to one side of the side lightning protection structure (5) away from the bottom plate (1). Between the two flipping rods (81), an adjusting shaft (82) is rotatably connected. Adjusting connecting rods (83) are evenly fixedly connected to the outer surface of the adjusting shaft (82). At the end of the adjusting connecting rod (83) away from the adjusting shaft (82), a transmission structure (9) is arranged. The transmission structure (9) is rotatably connected to a transmission shaft (91) at the end of each adjacent two adjusting connecting rods (83) away from the adjusting shaft (82). In the middle of the outer surface of the transmission shaft (91), a transmission block (92) is fixedly connected. At the end of the transmission block (92) away from the transmission shaft (91), a transmission plate (93) is fixedly connected. Between the two transmission plates (93) on the lower end face of the bottom plate (1), a flipping driving structure (10) is arranged; The flipping driving structure (10) includes rotating frames (101) symmetrically and fixedly connected to the lower end face of the bottom plate (1). Inside the cavity of the rotating frame (101), a threaded sleeve (102) is rotatably connected. Symmetrically threaded inside the threaded sleeve (102) are threaded rods (103). The ends of the two threaded rods (103) away from the threaded sleeve (102) are respectively fixedly connected to the transmission plates (93) on both sides of the threaded sleeve (102). Between the two threaded sleeves (102) on the lower end face of the bottom plate (1), a driving structure (11) is arranged; The driving structure (11) includes transmission gears (111) fixedly connected to the middle of the outer surfaces of the two threaded sleeves (102). The outer surfaces of the two transmission gears (111) are drivingly connected by a toothed belt (112). Meshed in the middle of the cavity of the toothed belt (112) is a driving gear (113). Fixedly connected to the middle of the lower end face of the bottom plate (1) is a driving motor (114). The output end of the driving motor (114) is fixedly connected to the driving gear (113).

2. The lightning protection device for a transformer according to claim 1, characterized in that, The lightning protection cage (3) includes mounting struts one (31) uniformly and fixedly connected to the rear part of the upper end surface of the bottom plate (1). Between two adjacent mounting struts one (31), there are uniformly and fixedly connected conductive crossbars one (32). The upper end surface of the mounting strut one (31) is fixedly connected with a mounting crossbar (33). Inside the cavity of the mounting crossbar (33), there are uniformly and fixedly connected conductive crossbars one (32). On the front end surface of the mounting crossbar (33), there is a fixing structure (7). On the middle parts of the left and right side end surfaces of the mounting crossbar (33), card slots are respectively opened.

3. The lightning protection device for a transformer according to claim 1, characterized in that, The connecting structure (4) includes connecting columns (41) fixedly connected to the four corners of the lower end surface of the bottom plate (1). At the corner of the upper end surface of the connecting column (41) far away from the bottom plate (1), there is a connecting block (42) fixedly connected. Between two longitudinal connecting blocks (42), there is a longitudinally rotating shaft (43) rotatably connected. Between two transverse connecting blocks (42), there is a transversely rotating shaft (44) rotatably connected.

4. The lightning protection device for a transformer according to claim 3, characterized in that, The side lightning protection structure (5) includes side connecting columns (51) uniformly and fixedly connected to the outer surface of the longitudinally rotating shaft (43). The upper end surface of the side connecting column (51) is fixedly connected with a side crossbar (52). Between two adjacent side connecting columns (51), there are uniformly and fixedly connected side conductive rods (53). Between the two side crossbars (52), there are respectively fixedly connected with clamping blocks that are mutually matched with the card slots on the mounting crossbar (33).

5. A lightning protection device for a transformer according to claim 3, characterized in that, The front-end lightning protection structure (6) includes front-end support rods (61) uniformly and fixedly connected to the outer surface of the transversely rotating shaft (44). The upper end surface of the front-end support rod (61) is fixedly connected with a front-end crossbar (62). Between two adjacent front-end crossbars (62), there are uniformly and fixedly connected front-end conductive crossbars (63). In the middle of the front end surface of the front-end crossbar (62), there is a pulling handle (64) fixedly connected.

6. The lightning protection device for a transformer according to claim 5, characterized in that, The fixing structure (7) includes a fixing claw (71) fixedly connected to the middle of the rear end surface of the front-end crossbar (62). In the middle of the front end surface of the mounting crossbar (33), there is a limit card slot (72). Inside the cavity of the limit card slot (72), there is a limit structure (73). The fixing claw (71) is clamped inside the cavity of the limit card slot (72). In the middle of the upper end surface of the limit card slot (72), there is a limit sliding groove. The limit structure (73) includes a limit clamping plate (731) slidably connected inside the limit sliding groove. On the upper end surface of the fixing claw (71), there is a groove that is mutually matched with the limit clamping plate (731). On the upper end surface of the limit clamping plate (731), there is a lifting plate (732) fixedly connected. Between the left and right sides of the lower end surface of the lifting plate (732) and the mounting crossbar (33), there are respectively transmission-connected springs (733).

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