High-voltage switch cabinet

Abstract

The invention relates to the technical field of high-voltage switch cabinets, and discloses a high-voltage switch cabinet which comprises a cabinet body, a U-shaped ventilation pipe is slidably connected to the top end of the cabinet body, an air inlet is formed in the bottom of the U-shaped ventilation pipe, a bearing plate is fixed in the air inlet, and a first air cylinder is fixed to the top of an inner cavity of the cabinet body; the first air cylinder is slidably connected with the U-shaped ventilation pipe, an output shaft of the first air cylinder is fixed to the bearing plate, supporting rods are fixed to the two sides of the bottom of the U-shaped ventilation pipe, and ventilation assemblies used for ventilation are arranged on the two sides of the cabinet body. And air is exhausted by the exhaust fan, so that external air enters the cabinet body through the side ventilation openings and the filter holes in a large flow manner to exchange heat with hot air in the cabinet body, and the hot air in the cabinet body enters the U-shaped ventilation pipes through the air inlets and is exhausted through the ventilation holes, thereby improving the heat dissipation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage switch cabinets, in particular to a high-voltage switch cabinet. BACKGROUND

[0002] The high-voltage switch cabinet is an important equipment in the power system, mainly used for voltage levels of 3.6kV to 550kV, and its core functions include breaking, switching on and switching off circuits, and can also realize control, protection and monitoring. The main components in the cabinet, such as circuit breakers and disconnectors, ensure the safe and stable operation of the power system. Some products have high protection levels, such as IP4X, which can effectively prevent external objects and personnel from contacting and ensure safe operation.

[0003] The high-voltage switch cabinet is divided into indoor and outdoor types. The ventilation openings of the high-voltage switch cabinet used outdoors are usually arranged on both sides of the cabinet body, so that the outside air can pass through the ventilation openings and exchange heat with the hot air in the switch cabinet, thereby achieving the effect of heat dissipation. However, this heat dissipation method on both sides relies on air convection, but the distribution of heat generating components such as busbars and joints in the cabinet body is uneven, which is easy to cause heat dissipation dead angles in the middle part, resulting in excessive local temperature. If the layout of the ventilation openings on both sides is not symmetrical, or is blocked by the cabinet body spacing and walls, the convection circulation will be disrupted, and the heat dissipation effect will be greatly reduced, especially in high-temperature environments, which cannot meet the heat dissipation requirements of high-power components. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a high-voltage switch cabinet to solve the problems raised in the background art.

[0005] The present application provides the following technical scheme: a high-voltage switch cabinet, comprising a cabinet body, a U-shaped ventilation pipe slidably connected to the top end of the cabinet body, an air inlet opening provided at the bottom of the U-shaped ventilation pipe, a load-bearing plate fixed inside the air inlet opening, a first air cylinder fixed to the top of the inner cavity of the cabinet body, the first air cylinder being slidably connected to the U-shaped ventilation pipe, the output shaft of the first air cylinder being fixed to the load-bearing plate, a brace fixed to the both sides of the bottom of the U-shaped ventilation pipe, and a ventilation assembly provided on both sides of the cabinet body for ventilation. The ventilation assembly comprises a clamping groove provided on both sides of the cabinet body, an L-shaped plate rotatably connected to the bottom end of the clamping groove, a triangular plate fixed to the both sides of the vertical portion of the L-shaped plate, a side ventilation opening provided in the vertical portion of the L-shaped plate, a filter hole provided on the surface of the triangular plate, and a water storage tank fixed to the surface of the vertical portion of the L-shaped plate, the top of the water storage tank being provided with a water inlet groove.

[0006] Optionally, a cabinet door is provided on the surface of the cabinet body, and ventilation holes are provided on the surfaces of the both sides of the U-shaped ventilation pipe.

[0007] Optionally, the bottom of the load-bearing plate is fixed with a mounting rack, and the inside of the mounting rack is fixed with an air extractor.

[0008] Optionally, the two sides of the bottom of the inner cavity of the cabinet are fixed with second air cylinders, the output shafts of the second air cylinders are fixed with support frames, the surface of the support frame is fixed with a guide plate, the surface of the guide plate is provided with flow guide grooves, the surface of the support frame is provided with connecting ports, and the number and positions of the flow guide grooves correspond to the connecting ports.

[0009] Optionally, the side, away from the clamping groove, of the top of the support frame is fixed with a first connecting piece, and the inside of the first connecting piece is rotatably connected with a fan roller.

[0010] Optionally, the inner walls of the two sides of the cabinet are fixed with second connecting pieces, one end of the second connecting piece is fixed with a vertical plate, and the side, close to the fan roller, of the vertical plate is fixed with a limiting plate.

[0011] Optionally, the inner walls of the two sides of the cabinet are fixed with clamping plates above the clamping grooves, the inside of the clamping plate is slidably connected with a sealing plate, and the bottom of the sealing plate abuts against the horizontal part of the clamping groove.

[0012] Optionally, the two sides of the top of the cabinet are rotatably connected with a top plate, the two sides of the top plate are fixed with extension rods, and the extension rods abut against the top of the two sides of the U-shaped ventilation pipe.

[0013] Optionally, the surface of the support frame abuts against the inner wall of the cabinet, the thickness of the support frame is equal to the thickness of the inner wall of the cabinet, and the surface of the support frame abuts against the vertical part of the clamping groove.

[0014] Compared with the prior art, the present application has the following beneficial effects: 1. The high-voltage switch cabinet collects rainwater through the water storage tank, increases the weight of the water storage tank, after a sunny day, controls the first air cylinder to drive the load-bearing plate, the U-shaped ventilation pipe and the supporting rod to return, makes the U-shaped ventilation pipe pop out, makes the L-shaped plate overturn, controls the air extractor to extract air from the cabinet, makes the outside air enter the inside of the cabinet through the side ventilation hole and the filter hole in large flow to exchange heat with the hot air in the cabinet, and makes the hot air in the cabinet enter the inside of the U-shaped ventilation pipe through the air inlet and is discharged through the ventilation hole, thereby improving the heat dissipation efficiency.

[0015] 2. When the L-shaped plate is turned outwards, the second air cylinder drives the support frame to move up and down repeatedly, the support frame controls the flow guide grooves and the connecting ports to move up and down repeatedly, thereby repeatedly changing the airflow entering the cabinet, improving the coverage range of the normal temperature air, and making the normal temperature air and the original hot air in the cabinet exchange heat more evenly, thereby reducing the probability of local high temperature in the cabinet.

[0016] 3. In this high-voltage switchgear, the support frame moves repeatedly, causing the first connecting piece and the fan blade roller to rise and fall synchronously. This causes the fan blade roller to collide with the limit plate in sequence. After being limited by the limit plate, the fan blade roller flips over. During the repeated rising and falling, the fan blade roller is in a rotating state, which further increases the mixing speed of the airflow inside the cabinet. This allows the ambient temperature air to transfer heat more fully with the original hot air, improving the uniformity and efficiency of heat dissipation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the working state structure of the present invention; Figure 2 This is a cross-sectional view of the structure of the present invention; Figure 3 This is a schematic diagram of the U-shaped ventilation duct of the present invention; Figure 4 This is a schematic diagram of the structure of the support frame and the first connecting member of the present invention; Figure 5 This is a schematic diagram of the structure of the second connector and the vertical plate of the present invention; Figure 6 This is a schematic diagram of the structure of the L-shaped plate and the triangular plate of the present invention; Figure 7 This is a schematic diagram of the structure in the initial state of the present invention; Figure 8 This is a cross-sectional view of the structure in the initial state of the present invention; Figure 9 for Figure 8 A magnified view of a portion of point A in the middle.

[0018] In the diagram: 1. Cabinet body; 11. Cabinet door; 2. U-shaped ventilation pipe; 201. Ventilation hole; 21. Air inlet; 22. Load-bearing plate; 23. First cylinder; 24. Support rod; 3. Slot; 31. L-shaped plate; 32. Triangular plate; 33. Side ventilation opening; 34. Filter hole; 35. Water tank; 36. Water inlet trough; 4. Mounting bracket; 41. Exhaust fan; 5. Second cylinder; 51. Support frame; 52. Guide plate; 53. Flow guide groove; 54. Connection port; 6. First connector; 61. Fan blade roller; 62. Second connector; 63. Vertical plate; 64. Limiting plate; 7. Clip plate; 71. Sealing plate; 8. Top plate; 81. Extension rod. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] Please see Figures 1-9 A high-voltage switchgear includes a cabinet body 1. A U-shaped ventilation pipe 2 is slidably connected to the top of the cabinet body 1. An air inlet 21 is opened at the bottom of the U-shaped ventilation pipe 2. A load-bearing plate 22 is fixed inside the air inlet 21. A first cylinder 23 is fixed at the top of the inner cavity of the cabinet body 1. The first cylinder 23 is slidably connected to the U-shaped ventilation pipe 2. The output shaft of the first cylinder 23 is fixed to the load-bearing plate 22. Support rods 24 are fixed on both sides of the bottom of the U-shaped ventilation pipe 2. Ventilation components for ventilation are provided on both sides of the cabinet body 1. The ventilation assembly includes a slot 3, which is located on both sides of the cabinet 1. An L-shaped plate 31 is rotatably connected to the bottom of the slot 3. Triangular plates 32 are fixed on both sides of the vertical part of the L-shaped plate 31. A side ventilation opening 33 is provided on the vertical part of the L-shaped plate 31. Filter holes 34 are provided on the surface of the triangular plates 32. A water storage tank 35 is fixed on the surface of the vertical part of the L-shaped plate 31. A water inlet trough 36 is provided on the top of the water storage tank 35. A cabinet door 11 is provided on the surface of the cabinet 1. Ventilation holes 201 are provided on both sides of the U-shaped ventilation pipe 2. A mounting bracket 4 is fixed to the bottom of the load-bearing plate 22. An exhaust fan 41 is fixed inside the mounting bracket 4. Specifically, in actual operation, when the present invention is applied outdoors and in rainy or snowy weather, the controller starts the first cylinder 23, causing the first cylinder 23 to push out, and then the first cylinder 23 drives the load-bearing plate 22 to descend, which in turn drives the U-shaped ventilation pipe 2 to descend. The U-shaped ventilation pipe 2 then drives the support rod 24 to descend, so that the support rod 24 abuts against the horizontal part of the L-shaped plate 31, thereby limiting the L-shaped plate 31. At this time, the U-shaped ventilation pipe 2 is completely retracted into the cabinet 1, thereby making the top of the cabinet 1 sealed. Rainwater and other water enter the interior of the water storage tank 35 through the water inlet 36 and are collected inside the water storage tank 35, thereby increasing the weight of the water storage tank 35 and causing the center of gravity of the L-shaped plate 31 to move toward the water storage tank 35. However, due to the limitation of the slot 3 by the support rod 24, the L-shaped plate 31 remains perpendicular to the cabinet 1. At this time, cabinet 1 acts as a heat-conducting structure. The hot air inside cabinet 1 transfers heat to the surface of cabinet 1, and rainwater carries away the heat from cabinet 1, thereby maintaining the heat dissipation effect on the inside of cabinet 1. Furthermore, when the rain and snow weather ends, the first cylinder 23 can be started by the controller, so that the first cylinder 23 returns. During the return process, the first cylinder 23 drives the load-bearing plate 22 to rise, so that the load-bearing plate 22 drives the U-shaped ventilation pipe 2 to rise and slide on the top of the cabinet 1, so that the two ends of the U-shaped ventilation pipe 2 extend outward from the top of the cabinet 1, and thus the ventilation holes 201 at both ends of the U-shaped ventilation pipe 2 extend to the outside of the cabinet 1. Then, the exhaust fan 41 is started by the controller. The exhaust fan 41 rotates to perform air extraction operation on the inner cavity of the cabinet 1. Since the exhaust fan 41 is located directly below the air inlet 21, when the exhaust fan 41 rotates, it draws the hot air from the inner cavity of the cabinet 1 into the interior of the U-shaped ventilation pipe 2 and discharges it to the outside through the ventilation hole 201. As the hot air inside the cabinet 1 is drawn into the U-shaped ventilation pipe 2 and discharged to the outside, a negative pressure is formed inside the cabinet 1, which accelerates the speed at which external air enters the cabinet 1 through the side ventilation port 33, thereby speeding up the air circulation inside the cabinet 1 and improving the heat dissipation efficiency inside the cabinet 1. Furthermore, when the first cylinder 23 drives the U-shaped ventilation pipe 2 to return, that is, when the U-shaped ventilation pipe 2 is sliding upward, the U-shaped ventilation pipe 2 drives the support rod 24 to rise synchronously, so that the support rod 24 releases the restriction on the L-shaped plate 31. Since there is still water in the water tank 35, the center of gravity of the L-shaped plate 31 is located on one side of the water tank 35. When the L-shaped plate 31 loses the restriction of the support rod 24, the entire L-shaped plate 31 flips towards the water tank 35. Reference manual attached Figure 2 At this time, the L-shaped plate 31 is in an outward flipped state. When the L-shaped plate 31 is in an outward flipped state, the horizontal part of the L-shaped plate 31 is limited by the slot 3, so that the L-shaped plate 31 can only flip at a fixed angle. After flipping, the L-shaped plate 31 drives the triangular plate 32 to flip to the outside of the cabinet 1, thereby allowing the interior of the cabinet 1 to connect with the outside through the side ventilation port 33 and the filter hole 34, thereby increasing the space flow channel for outside air to enter the interior of the cabinet 1, increasing the flow rate of outside air entering the interior of the cabinet 1 at the same time, and thus improving the heat dissipation efficiency of the interior of the cabinet 1.

[0022] It should be noted that all devices in this invention are controlled by a controller. The slot length of the slot 3 is greater than the length of the vertical part of the L-shaped plate 31. When the L-shaped plate 31 is flipped, it pushes the sealing plate 71 upward. When the L-shaped plate 31 needs to be rotated in the rain, the first cylinder 23 can be controlled to push out, so that the first cylinder 23 drives the load-bearing plate 22 to descend, so that the load-bearing plate 22 drives the U-shaped ventilation pipe 2 to descend, so that the U-shaped ventilation pipe 2 drives the support rod 24 to descend, and then the support rod 24 presses down the horizontal part of the L-shaped plate 31, so that the L-shaped plate 31 is retracted into the interior of the cabinet 1, so that the L-shaped plate 31 is reset to its initial state. In the initial state, both the L-shaped panel 31 and the U-shaped ventilation pipe 2 are retracted inside the cabinet 1. Under the action of gravity, the sealing plate 71 abuts against the horizontal part of the L-shaped panel 31 and adheres to the inner wall of the cabinet 1. This allows the sealing plate 71 to seal the remaining space of the slot 3, thereby preventing rainwater from entering the interior of the cabinet 1 through the slot 3 and maintaining the dryness of the interior of the cabinet 1.

[0023] Example 2

[0024] The bottom of the cabinet 1 is fixed with two sides of the second cylinder 5. The output shaft of the second cylinder 5 is fixed with a support frame 51. The surface of the support frame 51 is fixed with a guide plate 52. The surface of the guide plate 52 is provided with a flow guide groove 53. The surface of the support frame 51 is provided with a connection port 54. The number and position of the flow guide groove 53 correspond to the connection port 54. The top of the support frame 51 is fixed with a first connector 6 on the side away from the slot 3. The fan blade roller 61 is rotatably connected inside the first connector 6. The inner walls on both sides of the cabinet 1 are fixed with second connectors 62. A vertical plate 63 is fixed to one end of the second connector 62. A limit plate 64 is fixed to the side of the vertical plate 63 near the fan blade roller 61. A snap-fit ​​plate 7 is fixed to the inner walls on both sides of the cabinet 1 above the slot 3. A sealing plate 71 is slidably connected inside the snap-fit ​​plate 7. The bottom of the sealing plate 71 abuts against the horizontal part of the slot 3. The surface of the support frame 51 abuts against the inner wall of the cabinet 1. The thickness of the support frame 51 is equal to the thickness of the inner wall of the cabinet 1. The surface of the support frame 51 abuts against the vertical part of the slot 3. Specifically, based on Embodiment 1, when it is rainy or snowy, that is, when both the L-shaped panel 31 and the U-shaped ventilation pipe 2 are in their initial state, the top of the cabinet 1 is sealed. Then, the controller starts the second cylinder 5, which drives the support frame 51 to push out, so that the support frame 51 rises against the vertical part of the L-shaped panel 31. Since the connection port 54 corresponds to the guide channel 53, and the guide channel 53 and the side ventilation port 33 are staggered, the support frame 51 closes the side ventilation port 33 after rising, thus making both sides of the cabinet 1 closed as well. This prevents rainwater and moisture from entering the interior of the cabinet 1 during rainy or snowy weather, thereby maintaining the dryness inside the cabinet 1. Furthermore, in non-rainy or snowy weather, when the L-shaped panel 31 is flipped outwards, under the action of the exhaust fan 41, ambient air from the outside enters the interior of the cabinet 1 through the side ventilation port 33 and the filter hole 34. At this time, the second cylinder 5 can still be started by the controller, and the second cylinder 5 drives the support frame 51 to repeatedly rise and fall, so that the support frame 51 drives the guide channel 53 and the connection port 54 to repeatedly rise and fall. During the repeated rise and fall of the guide channel 53 and the connection port 54, the airflow entering the cabinet 1 through the side ventilation port 33 and the filter hole 34 passes through the connection port 54 and the guide channel 53, thereby causing the airflow to be turned by the connection port 54 and the guide channel 53. This allows ambient air to be guided by the connection port 54 and the guide channel 53 to be blown towards the lower part of the inner cavity of the cabinet 1, making the ambient air more evenly distributed in the inner cavity of the cabinet 1, so that the ambient air can fully contact the hot air in the inner cavity of the cabinet 1, thereby carrying out more complete heat transfer and improving the heat dissipation efficiency. Furthermore, when the second cylinder 5 drives the support frame 51 to repeatedly rise and fall, the support frame 51 drives the first connecting piece 6 to move up and down synchronously, so that the first connecting piece 6 drives the fan blade roller 61 to move up and down synchronously. During the rising and falling process, the fan blade roller 61 contacts the limiting plate 64 in turn and is limited by the limiting plate 64, so that the fan blade roller 61 turns over and deflects during the movement. The faster the second cylinder 5 rises and falls, the greater the contact force between the fan blade roller 61 and the limiting plate 64, that is, the faster the fan blade roller 61 rotates. During the repeated lifting and lowering of the support frame 51, the transmission fan blade roller 61 sequentially collides with the limiting plate 64 and flips over, so that the fan blade roller 61 is in a state of rotation while repeatedly lifting and lowering. In turn, the rotating fan blade roller 61 further plays the role of turbulence in the airflow inside the cabinet 1, so that the outside room temperature air and the hot air inside the cabinet 1 come into more sufficient contact, thereby improving the heat dissipation efficiency of the present invention once again.

[0025] It should be noted that the spacing of the limiting plate 64 is greater than the total length of the fan blade of the fan roller 61. When both the L-shaped plate 31 and the support frame 51 are in the initial state, the support frame 51 acts to block the L-shaped plate 31, preventing the L-shaped plate 31 from flipping inward toward the cabinet 1, thereby ensuring the stability of the L-shaped plate 31. Furthermore, under the action of the guide groove 53, the connection port 54 and the fan blade roller 61, the outside air enters the interior of the cabinet 1 and is prevented from being directly drawn away by the exhaust fan 41. This allows the room temperature air to have sufficient contact with the hot air inside the cabinet 1, thereby dissipating heat effectively and preventing the room temperature air from being drawn away before complete heat exchange.

[0026] Example 3

[0027] The top of the cabinet 1 is rotatably connected to the top of the two sides of the top, and extension rods 81 are fixed on both sides of the top of the top of the top of the top of the top of the U-shaped ventilation pipe 2. Specifically, based on Embodiment 1 and Embodiment 2, when the present invention is used outdoors for a long time, in non-rainy or snowy weather, the first cylinder 23 can be started and the return stroke of the first cylinder 23 can be controlled so that the first cylinder 23 drives the U-shaped ventilation pipe 2 to extend outward from the inside of the cabinet 1. During the outward extension of the U-shaped ventilation pipe 2, the two ends of the U-shaped ventilation pipe 2 will push the extension rod 81, and then drive the top plate 8 to flip through the extension rod 81. According to the instruction manual Figure 1As shown, after the U-shaped ventilation pipe 2 is extended, the U-shaped ventilation pipe 2 drives the extension rod 81 and the top plate 8 to rotate to a certain angle. During the rotation process, the top plate 8 shakes the dust on its surface, causing the dust on the surface of the top plate 8 to slide down along the inclined top plate 8, thereby reducing the probability of dust accumulating on the top of the top plate 8. This reduces the accumulation of dust on the top of the top plate 8, thus affecting the heat dissipation efficiency of the cabinet 1 and the top plate 8. Furthermore, in snowy weather, when the top of the top plate 8 contains snow, the weight of the snow will increase the load on the cabinet 1, making the cabinet 1 risky of collapsing. Therefore, when the top of the top plate 8 contains snow, the above steps can be repeated to start the first cylinder 23. The first cylinder 23 drives the U-shaped ventilation pipe 2 to push outward from the inside of the cabinet 1, thereby causing the U-shaped ventilation pipe 2 to drive the extension rod 81 and the top plate 8 to flip. During the flipping process, the snow on the top of the top plate 8 can be shaken off, thereby avoiding an increase in the load on the cabinet 1. Meanwhile, during the flipping of the top plate 8, the U-shaped ventilation pipe 2 is in a state of being pushed outward. At this time, the hot air inside the cabinet 1 continues to be discharged to the outside through the U-shaped ventilation pipe 2 and the ventilation hole 201 under the suction action of the exhaust fan 41. During the discharge process, the heat of the hot air is transferred to the U-shaped ventilation pipe 2, and then the heat is transferred to the top plate 8 through the U-shaped ventilation pipe 2, thereby accelerating the melting speed of the snow on the top of the top plate 8 and reducing the adhesion between the snow and the top of the top plate 8. This makes it easier for the snow on the top of the top plate 8 to be shaken off, thereby further improving the probability of the present invention removing the snow on the top of the top plate 8.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-voltage switchgear, comprising a cabinet (1), characterized in that: The top of the cabinet (1) is slidably connected to a U-shaped ventilation pipe (2), and the bottom of the U-shaped ventilation pipe (2) is provided with an air inlet (21). A load-bearing plate (22) is fixed inside the air inlet (21). A first cylinder (23) is fixed at the top of the inner cavity of the cabinet (1). The first cylinder (23) is slidably connected to the U-shaped ventilation pipe (2). The output shaft of the first cylinder (23) is fixed to the load-bearing plate (22). Support rods (24) are fixed on both sides of the bottom of the U-shaped ventilation pipe (2). Ventilation components for ventilation are provided on both sides of the cabinet (1). The ventilation assembly includes a slot (3), which is located on both sides of the cabinet (1). An L-shaped plate (31) is rotatably connected to the bottom of the slot (3). Triangular plates (32) are fixed on both sides of the vertical part of the L-shaped plate (31). A side ventilation opening (33) is provided on the vertical part of the L-shaped plate (31). A filter hole (34) is provided on the surface of the triangular plate (32). A water storage tank (35) is fixed on the surface of the vertical part of the L-shaped plate (31). A water inlet groove (36) is provided on the top of the water storage tank (35).

2. The high-voltage switchgear according to claim 1, characterized in that: The cabinet (1) has a cabinet door (11) on its surface, and the U-shaped ventilation pipe (2) has ventilation holes (201) on both sides of its surface.

3. The high-voltage switchgear according to claim 2, characterized in that: The bottom of the load-bearing plate (22) is fixed with a mounting bracket (4), and an exhaust fan (41) is fixed inside the mounting bracket (4).

4. The high-voltage switchgear according to claim 3, characterized in that: The cabinet (1) has a second cylinder (5) fixed on both sides of the bottom of the inner cavity. The output shaft of the second cylinder (5) is fixed with a support frame (51). The surface of the support frame (51) is fixed with a guide plate (52). The surface of the guide plate (52) is provided with a flow channel (53). The surface of the support frame (51) is provided with a connection port (54). The number and position of the flow channels (53) correspond to the connection port (54).

5. The high-voltage switchgear according to claim 4, characterized in that: The support frame (51) has a first connector (6) fixed on the side away from the slot (3) at the top, and a fan blade roller (61) is rotatably connected inside the first connector (6).

6. The high-voltage switchgear according to claim 5, characterized in that: The inner walls on both sides of the cabinet (1) are fixed with a second connector (62), and a vertical plate (63) is fixed at one end of the second connector (62). A limit plate (64) is fixed on the side of the vertical plate (63) near the fan blade roller (61).

7. The high-voltage switchgear according to claim 6, characterized in that: The inner walls on both sides of the cabinet (1) are fixed with a snap-fit ​​plate (7) above the slot (3). A sealing plate (71) is slidably connected inside the snap-fit ​​plate (7). The bottom of the sealing plate (71) abuts against the horizontal part of the slot (3).

8. The high-voltage switchgear according to claim 7, characterized in that: The top of the cabinet (1) is rotatably connected to the top two sides of the top, and extension rods (81) are fixed on both sides of the top plate (8). The extension rods (81) abut against the top of both sides of the U-shaped ventilation pipe (2).

9. The high-voltage switchgear according to claim 8, characterized in that: The surface of the support frame (51) abuts against the inner wall of the cabinet (1), the thickness of the support frame (51) is equal to the thickness of the inner wall of the cabinet (1), and the surface of the support frame (51) abuts against the vertical part of the slot (3).

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