A high-voltage switchgear

Abstract

The present invention relates to the technical field of high-voltage switchgear, and in particular to a high-voltage switchgear, comprising a cabinet body, wherein an air exchange chamber is fixedly installed inside the cabinet body, the air exchange chamber is located at the top of the inner wall of the cabinet body, a motor 1 is fixedly installed on the top of the air exchange chamber, the output shaft of the motor 1 is fixedly connected to a screw, a piston plate is slidably installed inside the air exchange chamber, the piston plate is slidably installed on the outside of the screw, a spring 1 is provided between the top of the piston plate and the inner wall of the air exchange chamber, a limiting ring is integrally formed inside the air exchange chamber, and the piston plate is located below the limiting ring. By the piston plate moving upward, the interior of the cabinet body and the exhaust pipe are effectively cooled, respectively, thereby improving the service life of the high-voltage switchgear, and by locking and separating the sliding nut 1 and the sliding nut 2, the continuity of the upward movement of the piston plate is improved, and at the same time, the safety of the air exchange chamber during use is improved, thereby improving the heat dissipation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage switch cabinets, and in particular to a high-voltage switch cabinet. Background Art

[0002] High-voltage switchgear is an indispensable equipment in the power system. It is responsible for controlling, protecting and monitoring high-voltage circuits. With the growth of power demand and the development of grid technology, the power density of high-voltage switchgear continues to increase, which leads to an increase in the heat generated by the equipment during operation. The heat dissipation problem becomes particularly critical. The existing heat dissipation methods usually adopt forced air cooling and liquid cooling. For example, a high-voltage switchgear in the publication number: CN117543395A, when in use, the outside air enters the high-voltage switchgear 1 from the air inlet. The first fan is located at the bottom of the chamber where the air inlet is located, and blows the air entering the high-voltage switchgear upward. The high-voltage switchgear is provided with an air outlet on the top. The air outlet is provided. There is a first fan. The negative pressure generated by the first fan will be turned into high-temperature air by the chamber and blown out to the external environment. However, in the process of heat dissipation of the high-voltage switchgear, it is necessary to install a first fan and increase the power of the first fan to enhance the heat dissipation effect. As the number increases, the first fan will generate a lot of noise during operation, which will affect the operator. As the power increases, the first fan will also generate high temperature during long-term operation, and the high temperature generated by the first fan cannot be effectively dissipated, thereby conducting heat energy to the high-voltage switchgear, resulting in the service life of the high-voltage switchgear and the first fan being affected, and the problem of inability to dissipate heat. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the background technology and to propose a high-voltage switch cabinet.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A high-voltage switchgear comprises a cabinet body, wherein an air exchange chamber is fixedly installed inside the cabinet body, the air exchange chamber is located at the top of the inner wall of the cabinet body, a motor is fixedly installed on the top of the air exchange chamber, the output shaft of the motor is fixedly connected to a screw, a piston plate is slidably installed inside the air exchange chamber, the piston plate is slidably installed on the outside of the screw, a spring is provided between the top of the piston plate and the inner wall of the air exchange chamber, a limiting ring is integrally formed inside the air exchange chamber, the piston plate is located below the limiting ring, a buffer plate is movably installed inside the air exchange chamber, and a plurality of The piston plate is located above the buffer plate, and a sliding nut 1 and a sliding nut 2 are movably installed on the top of the piston plate. The side wall of the sliding nut 2 is integrally formed with a rack, and the side wall of the sliding nut 1 is provided with a movable groove 3, and the rack is slidably inserted into the inside of the movable groove 3. The screw is rotatably installed between the sliding nut 1 and the sliding nut 2, and the sliding nut 1 and the sliding nut 2 are threadedly matched with the screw. An air intake port 1 is provided at the bottom of the air exchange chamber, and the interior of the air exchange chamber is connected to the interior of the cabinet through the air intake port 1, and a one-way valve 1 is fixedly installed inside the air intake port 1.

[0006] In the above-mentioned high-voltage switchgear, an exhaust pipe is fixedly installed at the bottom of the air exchange chamber, an air inlet is opened at the bottom of the exhaust pipe, a one-way valve three is fixedly installed inside the air inlet, a heat dissipation port is opened at the top of the cabinet body, an exhaust hole one is opened at the top of the exhaust pipe, the exhaust hole one and the heat dissipation port are communicated with each other, an air inlet is opened at the top of the cabinet body, an air intake port two is opened at the top of the air exchange chamber, the air intake port two and the air inlet are communicated with each other, and a one-way valve two is fixedly installed inside the air intake port two.

[0007] In the above-mentioned high-voltage switchgear, a ventilation pipe is fixedly installed on the side wall of the ventilation chamber, a one-way valve four is fixedly installed on the side wall of the ventilation pipe, the one-way valve four is located above the limit ring, an exhaust hole two is opened at the bottom of the ventilation pipe, a one-way valve five is fixedly installed inside the exhaust hole two, an exhaust branch pipe is integrally formed at the bottom of the exhaust pipe, and the exhaust hole two is fixedly sleeved on the outside of the exhaust branch pipe.

[0008] In the above-mentioned high-voltage switchgear, a lock plate is slidably installed inside the movable slot three, a spring six is provided between the bottom of the lock plate and the bottom of the movable slot three, the top of the lock plate is engaged with the rack, and the side walls of the rack and the lock plate are respectively provided with a lock hole one and a lock hole two, a lock rod two is slidably installed inside the lock hole two, a spring five is provided between the bottom of the lock rod two and the bottom of the movable slot three, and the lock rod two is slidably inserted into the inside of the lock hole one.

[0009] In the above-mentioned high-voltage switchgear, a movable groove 1 is provided at the top of the air exchange chamber, a locking rod 1 is movably installed inside the movable groove 1, a spring 3 is provided between the top of the locking rod 1 and the top of the movable groove 1, a spring 4 is provided between the side wall of the locking rod 1 and the side wall of the movable groove 1, the locking rod 1 is slidably inserted into the inside of the lock hole 1, a sliding groove 2 is provided at the top of the sliding nut 1, and the locking rod 1 is slidably installed inside the sliding groove 2.

[0010] In the above-mentioned high-voltage switchgear, the bottoms of the sliding nut 1 and the sliding nut 2 are both integrally formed with sliders, the top of the piston plate is provided with a slide groove 1, the slider is slidably installed inside the slide groove 1, the bottom of the slider is provided with an inclined groove 2, the side wall of the piston plate is provided with a movable groove 2, the inside of the movable groove 2 is slidably installed with a spring sliding tooth, and the spring sliding tooth is slidably installed inside the inclined groove 2.

[0011] In the above-mentioned high-voltage switchgear, a convex tooth 1 is integrally formed on the top of the air exchange chamber, and an inclined groove 1 is provided on the top of the sliding nut 1 and the sliding nut 2, and the convex tooth 1 is slidably installed inside the inclined groove 1.

[0012] In the above-mentioned high-voltage switch cabinet, a plurality of air intake nets are fixedly installed on the front door and the rear door of the cabinet, and ventilation nets are fixedly installed on the side walls of each compartment inside the cabinet.

[0013] Compared with the existing technology, the advantages of the present invention are:

[0014] 1. The present invention cooperates between the piston plate and the air exchange chamber. In the process of cooling the cabinet, the motor drives the screw to rotate, and the screw drives the piston plate to move upward through the sliding nut 1 and the sliding nut 2. At this time, the piston plate draws the hot air inside the cabinet into the air exchange chamber, and at the same time discharges the cold air inside the air exchange chamber into the interior of the ventilation pipe. The cold air outside the cabinet enters the interior of the cabinet through the air inlet net for heat dissipation. The cold air is transported into the interior of the exhaust pipe through the ventilation pipe to dissipate heat to the exhaust pipe. The piston plate moves upward to effectively dissipate heat to the interior of the cabinet and the exhaust pipe, thereby improving the service life of the high-voltage switchgear.

[0015] 2. The present invention cooperates with the sliding nut 1 and the sliding nut 2. During the process of cooling the cabinet, when the locking rod 2 locks the sliding nut 1 and the sliding nut 2, the screw drives the piston plate to move upward through the sliding nut 1 and the sliding nut 2 to replace the air inside the cabinet. When the sliding nut 1 and the sliding nut 2 are separated, the piston plate moves downward through the spring, so that the hot air inside the air exchange chamber is quickly discharged, and at the same time, the cold air outside the cabinet enters the air exchange chamber to dissipate heat inside the air exchange chamber. When the piston plate hits the buffer plate, the locking rod 2 locks the sliding nut 1 and the sliding nut 2 again. Through the locking and separation between the sliding nut 1 and the sliding nut 2, the continuity of the upward movement of the piston plate is improved, and the safety of the air exchange chamber during use is improved, thereby improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0018] Figure 3 For the present invention Figure 2 A magnified schematic diagram of point A in the middle;

[0019] Figure 4 Schematic diagram of the structure of the air exchange cavity in the present invention;

[0020] Figure 5 This is a cross-sectional view of the structure of the air exchange cavity in the present invention;

[0021] Figure 6 For the present invention Figure 5 A magnified schematic diagram of point B in the middle;

[0022] Figure 7 A partial cross-sectional view of the air exchange chamber in the present invention;

[0023] Figure 8 Schematic diagram of disassembly of sliding nut 1 and sliding nut 2 in the present invention;

[0024] Figure 9 Schematic diagram of the bottom of the sliding nut 1 and the sliding nut 2 in the present invention;

[0025] Figure 10 This is a disassembled schematic diagram of the exhaust pipe and ventilation pipe in the present invention.

[0026] In the figure: 1. Cabinet; 111. Heat dissipation vent; 112. Air inlet; 121. Air inlet grille; 122. Ventilation grille; 21. Air exchange chamber; 211. Motor 1; 212. Screw; 213. Protruding tooth 1; 214. Air intake 1; 215. One-way valve 1; 216. Movable groove 1; 217. Limiting ring; 218. Air intake 2; 219. One-way valve 2; 22. Piston plate; 221. Spring 1; 222. Buffer plate; 223. Spring 2; 224. Slide 1; 225. Movable groove 2; 231. Exhaust pipe; 232. Exhaust branch pipe; 233. Exhaust hole 1; 234. Air inlet; 235. One-way valve three; 236. Ventilation pipe; 237. One-way valve four; 238. Exhaust hole two; 239. One-way valve five; 241. Sliding nut one; 242. Sliding nut two; 243. Inclined slot one; 244. Inclined slot two; 245. Sliding slot two; 246. Rack; 247. Locking hole one; 248. Movable slot three; 249. Slider; 251. Locking rod one; 252. Spring three; 253. Spring four; 254. Locking rod two; 255. Spring five; 256. Locking plate; 257. Spring six; 258. Locking hole two; 259. Spring sliding tooth. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0029] Reference Figure 1 - Figure 10As shown, a high-voltage switchgear includes a cabinet body 1, an air exchange chamber 21 is fixedly installed inside the cabinet body 1, the air exchange chamber 21 is located at the top of the inner wall of the cabinet body 1, a motor 211 is fixedly installed on the top of the air exchange chamber 21, the output shaft of the motor 211 is fixedly connected to a screw 212, a piston plate 22 is slidably installed inside the air exchange chamber 21, the piston plate 22 is slidably installed on the outside of the screw 212, a spring 221 is provided between the top of the piston plate 22 and the inner wall of the air exchange chamber 21, a limiting ring 217 is integrally formed inside the air exchange chamber 21, the piston plate 22 is located below the limiting ring 217, a buffer plate 222 is movably installed inside the air exchange chamber 21, and a plurality of evenly distributed springs are provided between the bottom of the buffer plate 222 and the bottom of the air exchange chamber 21. 223, the piston plate 22 is located above the buffer plate 222, and a sliding nut 1 241 and a sliding nut 2 242 are movably installed on the top of the piston plate 22, and a rack 246 is integrally formed on the side wall of the sliding nut 242, and a movable groove 3 248 is provided on the side wall of the sliding nut 1 241, and the rack 246 is slidably inserted into the inside of the movable groove 3 248, and the screw 212 is rotatably installed between the sliding nut 1 241 and the sliding nut 2 242, and the sliding nut 1 241 and the sliding nut 2 242 are threadedly matched with the screw 212, and an air intake 1 214 is provided at the bottom of the air exchange chamber 21, and the interior of the air exchange chamber 21 is communicated with the interior of the cabinet 1 through the air intake 1 214, and a one-way valve 1 215 is fixedly installed inside the air intake 1 214.

[0030] Among them, the working principle of the piston plate 22 is as follows: when the motor 1 211 is started, the screw 212 rotates, and the sliding nut 1 241 and the sliding nut 242 are threadedly matched with the screw 212, so that the sliding nut 1 241 and the sliding nut 242 drive the piston plate 22 to move upward. At this time, the one-way valve 1 215 is opened, and the piston plate 22 sucks the hot air inside the cabinet 1 into the air exchange chamber 21 through the air intake 1 214, and discharges the cold air inside the air exchange chamber 21. When the piston plate 22 hits the limit ring 217, the sliding nut 1 241 and the sliding nut 242 are threadedly matched with the screw 212, so that the sliding nut 1 241 and the sliding nut 242 drive the piston plate 22 to move upward. Nut 2 242 cancels the threaded fit between the screw 212, and the piston plate 22 slides downward through the spring 1 221. At this time, the one-way valve 1 215 is closed, so that the hot air inside the air exchange chamber 21 is discharged, and the cold air outside the cabinet 1 is drawn into the interior of the air exchange chamber 21. When the piston plate 22 moves downward and hits the buffer plate 222, the sliding nut 1 241 and the sliding nut 2 242 are threadedly fitted with the screw 212 again, so that the sliding nut 1 241 and the sliding nut 2 242 drive the piston plate 22 to move upward again, replacing the hot air inside the cabinet 1.

[0031] like Figure 3-Figure 5 and Figure 10As shown, an exhaust pipe 231 is fixedly installed at the bottom of the air exchange chamber 21, an air inlet 234 is opened at the bottom of the exhaust pipe 231, and a one-way valve 235 is fixedly installed inside the air inlet 234. A heat dissipation port 111 is opened at the top of the cabinet 1, an exhaust hole 233 is opened at the top of the exhaust pipe 231, and the exhaust hole 233 and the heat dissipation port 111 are connected to each other. An air inlet 112 is opened at the top of the cabinet 1, and an air intake 218 is opened at the top of the air exchange chamber 21, and the air intake 218 and the air inlet 112 are connected to each other. A one-way valve 219 is fixedly installed inside the second air intake port 218, a ventilation pipe 236 is fixedly installed on the side wall of the ventilation chamber 21, a one-way valve 237 is fixedly installed on the side wall of the ventilation pipe 236, and the one-way valve 237 is located above the limiting ring 217. An exhaust hole 238 is provided at the bottom of the ventilation pipe 236, and a one-way valve 5 239 is fixedly installed inside the exhaust hole 238. An exhaust branch pipe 232 is integrally formed at the bottom of the exhaust pipe 231, and the exhaust hole 238 is fixedly sleeved on the outside of the exhaust branch pipe 232.

[0032] Among them, the working principle of the exhaust pipe 231 and the ventilation pipe 236 is as follows: when the piston plate 22 moves upward, the one-way valve three 235 and the one-way valve two 219 are closed, and the one-way valve one 215, the one-way valve four 237 and the one-way valve five 239 are opened, so that the piston plate 22 draws the hot air inside the cabinet 1 into the interior of the ventilation chamber 21 and is located below the piston plate 22. The cold air inside the ventilation chamber 21 above the piston plate 22 is discharged into the interior of the ventilation pipe 236 through the piston plate 22. The cold air inside the ventilation pipe 236 enters the interior of the exhaust pipe 231 through the exhaust hole two 238 and the exhaust branch pipe 232. The cold air is discharged to the exhaust pipe 231. The pipe 231 is cooled and discharged to the heat dissipation port 111 for discharge. When the piston plate 22 moves downward, the one-way valve 1 215, the one-way valve 4 237 and the one-way valve 5 239 are closed, and the one-way valve 3 235 and the one-way valve 2 219 are opened, so that the piston plate 22 draws the cold air outside the cabinet 1 into the interior of the air exchange chamber 21 through the air inlet 112 and the air intake 2 218, and cools the air exchange chamber 21 above the piston plate 22. The hot air inside the air exchange chamber 21 below the piston plate 22 is discharged into the exhaust pipe 231 through the piston plate 22, and is discharged to the heat dissipation port 111 for discharge.

[0033] like Figure 7-Figure 9As shown, a lock plate 256 is slidably installed inside the movable groove 3 248, a spring 6 257 is provided between the bottom of the lock plate 256 and the bottom of the movable groove 3 248, the top of the lock plate 256 is engaged with the rack 246, and the side walls of the rack 246 and the lock plate 256 are respectively provided with a lock hole 1 247 and a lock hole 258, a lock rod 254 is slidably installed inside the lock hole 258, a spring 5 255 is provided between the bottom of the lock rod 254 and the bottom of the movable groove 3 248, and the lock rod 254 is slidably inserted into the lock hole 1 2 47, a movable groove 216 is provided at the top of the air exchange chamber 21, a locking rod 251 is movably installed inside the movable groove 216, a spring 3 252 is provided between the top of the locking rod 251 and the top of the movable groove 216, a spring 4 253 is provided between the side wall of the locking rod 251 and the side wall of the movable groove 216, the locking rod 251 is slidably inserted into the inside of the lock hole 247, a sliding groove 245 is provided at the top of the sliding nut 241, and the locking rod 251 is slidably installed inside the sliding groove 245.

[0034] like Figure 5-Figure 9 As shown, the bottom of the sliding nut 1 241 and the sliding nut 2 242 are both integrally formed with a slider 249, the top of the piston plate 22 is provided with a slide groove 1 224, the slider 249 is slidably installed inside the slide groove 1 224, the bottom of the slider 249 is provided with an inclined groove 244, the side wall of the piston plate 22 is provided with a movable groove 225, the inside of the movable groove 225 is slidably installed with a spring sliding tooth 259, the spring sliding tooth 259 is slidably installed inside the inclined groove 244, the top of the air exchange chamber 21 is integrally formed with a convex tooth 1 213, the top of the sliding nut 1 241 and the sliding nut 242 are provided with an inclined groove 1 243, the convex tooth 1 213 is slidably installed inside the inclined groove 1 243.

[0035] Among them, the working principle of sliding nut 1 241 and sliding nut 2 242 is as follows: in the process of piston plate 22 moving upward, when piston plate 22 is about to abut against limit ring 217, locking rod 1 251 is inserted into the interior of locking hole 1 247 and abuts locking rod 2 254, so that locking rod 2 254 moves out of locking hole 1 247. At this time, convex tooth 1 213 abuts against inclined groove 1 243, so that sliding nut 1 241 and sliding nut 2 242 move in the direction away from screw rod 212. Locking hole 1 247 drives locking rod 1 251 to slide inside sliding groove 2 245 and movable groove 1 216. Sliding nut 1 241 and sliding nut 2 242 cancel the threaded fit between them and screw rod 212. At this time, piston plate 22 is connected to piston plate 22 by spring 1 22. 1 slides downward, the locking rod 1 251 moves out of the locking hole 1 247, and the locking rod 1 251 returns to its original position through the spring 3 252 and the spring 4 253. The locking plate 256 locks the sliding nut 242 through the rack 246. When the piston plate 22 abuts the buffer plate 222, the buffer plate 222 abuts the spring sliding tooth 259, and the spring sliding tooth 259 abuts the inclined groove 244, so that the sliding nut 1 241 and the sliding nut 2 242 slide toward the direction of the screw rod 212. When the locking hole 1 247 and the locking hole 2 258 are connected to each other, the locking rod 254 slides into the interior of the locking hole 1 247 through the spring 5 255. At this time, the sliding nut 1 241 and the sliding nut 2 242 are threadedly engaged with the screw rod 212 again, and the piston plate 22 continues to move upward.

[0036] like Figure 1 and Figure 2 As shown, a plurality of air intake nets 121 are fixedly installed on the front door and the rear door of the cabinet 1 , and a ventilation net 122 is fixedly installed on the side walls of each compartment inside the cabinet 1 .

[0037] The air inlet net 121 draws air outside the cabinet 1 into the cabinet 1 for heat dissipation, and the ventilation net 122 connects the various compartments inside the cabinet 1.

[0038] The specific working principle and use method of the present invention are explained in detail below: start the motor 1 211, the screw 212 drives the piston plate 22 to slide upward through the sliding nut 1 241 and the sliding nut 2 242, and the piston plate 22 draws the hot air inside the cabinet 1 into the interior of the air exchange chamber 21, so that the cold air outside the cabinet 1 enters the interior of the cabinet 1 through the air inlet net 121 for cooling, and the cold air inside the air exchange chamber 21 enters the interior of the exhaust pipe 231 through the air exchange pipe 236 for cooling. When the piston plate 22 hits the limit ring 217, The sliding nut 1 241 and the sliding nut 2 242 are separated, and the threaded fit with the screw 212 is cancelled. The piston plate 22 slides downward through the spring 1 221, so that the hot air inside the air exchange chamber 21 is discharged through the exhaust pipe 231. At the same time, the cold air outside the cabinet 1 enters the interior of the air exchange chamber 21 through the air intake 2 218 for cooling. When the piston plate 22 hits the buffer plate 222, the sliding nut 1 241 and the sliding nut 2 242 return to their original positions, and the screw 212 drives the piston plate 22 to move upward again and continue to dissipate heat from the cabinet 1.

[0039] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0040] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-voltage switchgear, comprising a cabinet body (1), characterized in that: An air exchange chamber (21) is fixedly installed inside the cabinet (1), and the air exchange chamber (21) is located at the top of the inner wall of the cabinet (1). A motor (211) is fixedly installed on the top of the air exchange chamber (21), and the output shaft of the motor (211) is fixedly connected to a screw (212). A piston plate (22) is slidably installed inside the air exchange chamber (21), and the piston plate (22) is slidably installed on the outside of the screw (212). A spring (221) is provided between the top of the piston plate (22) and the inner wall of the air exchange chamber (21). A limiting ring (217) is integrally formed inside the air exchange chamber (21), and the piston plate (22) is located below the limiting ring (217). A buffer plate (222) is movably installed inside the air exchange chamber (21), and a plurality of evenly distributed springs (223) are provided between the bottom of the buffer plate (222) and the bottom of the air exchange chamber (21). The plug plate (22) is located above the buffer plate (222), and a sliding nut (241) and a sliding nut (242) are movably installed on the top of the piston plate (22). The side wall of the sliding nut (242) is integrally formed with a rack (246), and the side wall of the sliding nut (241) is provided with a movable groove (248). The rack (246) is slidably inserted into the inside of the movable groove (248), and the screw (212) is rotated to install Installed between sliding nut 1 (241) and sliding nut 2 (242), the sliding nut 1 (241) and sliding nut 2 (242) are threadedly matched with the screw (212), the bottom of the air exchange chamber (21) is provided with an air intake port 1 (214), the interior of the air exchange chamber (21) is communicated with the interior of the cabinet (1) through the air intake port 1 (214), and a one-way valve 1 (215) is fixedly installed inside the air intake port 1 (214); A locking plate (256) is slidably installed inside the movable groove three (248), a spring six (257) is provided between the bottom of the locking plate (256) and the bottom of the movable groove three (248), the top of the locking plate (256) is engaged with the rack (246), the side walls of the rack (246) and the locking plate (256) are respectively provided with a lock hole one (247) and a lock hole two (258), a locking rod two (254) is slidably installed inside the lock hole two (258), a spring five (255) is provided between the bottom of the lock rod two (254) and the bottom of the movable groove three (248), and the lock rod two (254) is slidably inserted into the interior of the lock hole one (247); The top of the air exchange chamber (21) is provided with a movable groove 1 (216), and a locking rod 1 (251) is movably installed inside the movable groove 1 (216). A spring 3 (252) is provided between the top of the locking rod 1 (251) and the top of the movable groove 1 (216), and a spring 4 (253) is provided between the side wall of the locking rod 1 (251) and the side wall of the movable groove 1 (216). The locking rod 1 (251) is slidably inserted into the inside of the lock hole 1 (247), and the top of the sliding nut 1 (241) is provided with a sliding groove 2 (245), and the locking rod 1 (251) is slidably installed inside the sliding groove 2 (245); The bottoms of the sliding nut 1 (241) and the sliding nut 2 (242) are both integrally formed with a slider (249), the top of the piston plate (22) is provided with a slide groove 1 (224), the slider (249) is slidably mounted inside the slide groove 1 (224), the bottom of the slider (249) is provided with an inclined groove 2 (244), the side wall of the piston plate (22) is provided with a movable groove 2 (225), the inside of the movable groove 2 (225) is slidably mounted with a spring sliding tooth (259), and the spring sliding tooth (259) is slidably mounted inside the inclined groove 2 (244); The top of the air exchange chamber (21) is integrally formed with a convex tooth 1 (213), and the tops of the sliding nut 1 (241) and the sliding nut 2 (242) are provided with an inclined groove 1 (243), and the convex tooth 1 (213) is slidably mounted inside the inclined groove 1 (243).

2. A high-voltage switchgear according to claim 1, characterized in that: An exhaust pipe (231) is fixedly installed at the bottom of the air exchange chamber (21), an air inlet (234) is provided at the bottom of the exhaust pipe (231), and a one-way valve (235) is fixedly installed inside the air inlet (234). A heat dissipation port (111) is provided at the top of the cabinet (1), an exhaust hole (233) is provided at the top of the exhaust pipe (231), and the exhaust hole (233) and the heat dissipation port (111) are communicated with each other. An air inlet (112) is provided at the top of the cabinet (1), and an air intake port (218) is provided at the top of the air exchange chamber (21), and the air intake port (218) and the air inlet (112) are communicated with each other. A one-way valve (219) is fixedly installed inside the air intake port (218).

3. The high-voltage switchgear according to claim 2, characterized in that: A ventilation pipe (236) is fixedly installed on the side wall of the ventilation chamber (21), and a one-way valve four (237) is fixedly installed on the side wall of the ventilation pipe (236). The one-way valve four (237) is located above the limiting ring 217. An exhaust hole two (238) is opened at the bottom of the ventilation pipe (236), and a one-way valve five (239) is fixedly installed inside the exhaust hole two (238). An exhaust branch pipe (232) is integrally formed at the bottom of the exhaust pipe (231), and the exhaust hole two (238) is fixedly sleeved on the outside of the exhaust branch pipe (232).

4. The high-voltage switchgear according to claim 1, characterized in that: The front door and the rear door of the cabinet (1) are both fixedly mounted with a plurality of air intake nets (121), and the side walls of each compartment inside the cabinet (1) are both fixedly mounted with ventilation nets (122).

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