A fast heat dissipation type State Grid standardized low-voltage cabinet

Abstract

The invention discloses a fast heat dissipation type State Grid standardized low-voltage cabinet, which relates to the technical field of low-voltage cabinet structure, including a cabinet, wherein a driving mechanism is arranged in the cabinet; the driving mechanism includes a fixed plate fixed in the cabinet, a guide rod is fixedly connected to the fixed plate, a movable block sliding up and down along the guide rod is slidably connected on the guide rod, a fan is installed on the movable block, and a screw rod is rotatably connected on the fixed plate; the screw rod passes through the movable block so that the screw rod and the movable block form a screw nut transmission, a servo motor is installed on the fixed plate, and the servo motor is connected to the end of the screw rod to drive the screw rod to rotate forward and reversely. The invention moves the electrical components in the cabinet up and down by the fan to blow or exhaust air for cooling, and the fan moves up and down so that the fan hot air flow in the cabinet is arranged more comprehensively up and down; in the process of the fan dissipating the heat of the electrical components in the cabinet up and down, the flexible bristles are automatically driven to intermittently clean the surface of the fan blades.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage cabinet structures, and in particular to a fast heat dissipation type state-grid standardized low-voltage cabinet. Background Art

[0002] Low-voltage cabinet, also known as low-voltage switchgear or low-voltage distribution cabinet, is a complete set of switchgear and control equipment used for the low-voltage distribution part of the power system. It is suitable for occasions where AC and DC voltages are below 1000V. It is mostly installed in the distribution room for power transmission, distribution and power conversion. It can realize automatic control and protection functions of electrical equipment to ensure the stable operation of the power supply system.

[0003] When the equipment inside the low-voltage cabinet is running, it will generate heat. If this heat cannot be dissipated in time, it will cause the temperature to rise. Long-term high-temperature operation will affect the life and normal operation of the equipment, and may even cause safety hazards such as circuit failure and short circuit, and in serious cases may cause fire. Therefore, the heat dissipation of the low-voltage cabinet is a key link to ensure its normal operation and extend its service life. In order to meet the heat dissipation standards of the low-voltage cabinet, the low-voltage cabinet must be heat-dissipated.

[0004] The existing low-voltage cabinet heat dissipation structure installs a cooling fan on the cabinet body of the low-voltage cabinet to accelerate the heat dissipation speed through the fan circulating air. However, the fan heat dissipation position of this method is fixed, which is not convenient for overall heat dissipation, resulting in uneven internal heat dissipation and easily causing excessive heat in the low-voltage cabinet. Summary of the invention

[0005] The purpose of the present invention is to solve the above technical problems and provide a fast heat dissipation type State Grid standardized low-voltage cabinet.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A fast heat dissipation type State Grid standardized low-voltage cabinet comprises a cabinet body, wherein a driving mechanism is arranged in the cabinet body; the driving mechanism comprises a fixed plate fixed in the cabinet body, a guide rod is fixedly connected to the fixed plate, a movable block which slides up and down along the guide rod is slidably connected to the guide rod, a fan is installed on the movable block, a screw rod is rotatably connected to the fixed plate, and the screw rod is arranged parallel to the guide rod; a threaded through hole is opened on the movable block, the screw rod passes through the movable block and cooperates with the threaded through hole through a thread so that the screw rod and the movable block form a screw nut transmission, a servo motor is installed on the fixed plate, and the servo motor is transmission-connected to the end of the screw rod to drive the screw rod to rotate forward and reversely.

[0008] Furthermore, the guide rod is arranged vertically, and the fixing plate is fixed to the upper end of the guide rod.

[0009] Furthermore, the fan includes a wind tube and a first motor installed in the wind tube, a rotating shaft is rotatably connected in the wind tube, fan blades are fixedly connected to the shaft wall of the rotating shaft, and an output shaft of the first motor is transmission-connected to the rotating shaft to drive the rotating shaft to rotate and drive the fan blades to rotate.

[0010] Furthermore, heat dissipation side panels are fixedly connected to both sides of the cabinet, and heat dissipation grille holes are opened on the heat dissipation side panels. The driving mechanism is provided with two groups, and the two groups of driving mechanisms are respectively located in the cabinet near the side panels on both sides of the cabinet, so that the electrical components inside the cabinet are located between the fans in the two groups of driving mechanisms.

[0011] Furthermore, the fans on the movable blocks in the two groups of the driving mechanisms are relatively coaxially arranged, and the blowing directions of the two fans are the same.

[0012] Furthermore, a mounting block is installed on the fixed plate, and the lower end of the mounting block is fixedly connected to a connecting rod, and the connecting rod extends downward to the air outlet side of the fan and is fixedly connected to a first brush plate, and the first brush plate is fixedly connected to a side facing the fan with flexible bristles, and the flexible bristles are used to fit on the blades of the fan to clean the surface of the blades.

[0013] Furthermore, the fixed plate is rotatably connected to a first gear, the fixed plate is slidably connected to a push rod and the push rod passes through the fixed plate, the push rod is fixedly connected to a first rack, the first rack and the first gear are meshed with meshing teeth to form a gear-rack transmission; the mounting block is slidably matched with the fixed plate, the mounting block is fixedly connected to a second rack, the second rack and the first gear are meshed with meshing teeth to form a gear-rack transmission, the push rod and the movable block are arranged relative to each other so that the movable block pushes the push rod away from the fixed plate after approaching the push rod.

[0014] Furthermore, a supporting plate is fixedly connected to the fixed plate, a second sliding groove is provided on the supporting plate, and the mounting block is slidably connected in the second sliding groove.

[0015] Furthermore, the upper end of the push rod is fixedly connected to a limiting block, the lower end of the push rod is fixedly connected to a stopper, the stopper is located below the fixed plate and a first compression spring is provided between the stopper and the fixed plate.

[0016] Furthermore, a first slide groove is provided in the connecting rod, and a second brush plate is slidably connected in the first slide groove, the second brush plate and the first brush plate are both arranged vertically, and the second brush plate is fixedly connected with flexible bristles on the side close to the fan, and the flexible bristles on the second brush plate are arranged overlapping with the flexible bristles on the first brush plate, and the second brush plate is transmission-connected to the support plate so that when the connecting rod moves closer to the wind tube, it drives the second brush plate to move upward so that the second brush plate moves upward and unfolds relative to the first brush plate.

[0017] Furthermore, a pull rope is fixedly connected to the upper end of the second brush plate, and a roller is rotatably connected to the connecting rod. The end of the pull rope away from the second brush plate passes around the roller and is fixedly connected to the support plate. A second compression spring is provided in the connecting rod, and the lower end of the second compression spring abuts against the end of the second brush plate.

[0018] The invention provides a fast heat dissipation type State Grid standardized low-voltage cabinet, which has the following beneficial effects: the servo drives the screw to rotate, and the screw cooperates with the movable block to drive the movable block to move up and down along the screw, driving the fan to move up and down, so that the fan moves up and down to blow or exhaust air to the electrical components in the cabinet for cooling. The up and down movement of the fan makes the up and down arrangement of the hot air flow in the cabinet more comprehensive, so that the heat generated by the internal electrical components can be discharged, so that the internal heat dissipation is more efficient and uniform; through the cooperation of the fan and the top rod, the fan moves up and down to provide a cooling air source in the cabinet, and when the fan is close to the fixed plate, the fan drive The top rod moves upward, and the upward movement transmission of the top rod causes the connecting rod to move toward the wind tube, so that the bristles on the first brush plate extend into the wind tube to clean the fan blades, so that in the process of the fan dissipating heat to the electrical components in the cabinet up and down, the flexible bristles are automatically driven to intermittently clean the surface of the fan blades; at the same time, the connecting rod moves toward the wind tube to drive the second brush plate to move upward, so that the flexible bristles on the second brush plate move upward, so that the flexible bristles on the second brush plate are relative to the flexible bristles on the first brush plate. Expand to form a wider cleaning space, so that the expanded flexible bristles can clean the entire surface of the fan blade, thereby expanding the cleaning area and improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0020] Figure 1 A schematic diagram of the internal structure of a fast heat dissipation type State Grid standardized low-voltage cabinet provided by the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the local structure of part A in the middle;

[0022] Figure 3 for Figure 2 Schematic diagram of the local structure of the middle B part;

[0023] Figure 4 A schematic diagram of the partial structure of the side view of the connecting rod in a fast heat dissipation type State Grid standardized low-voltage cabinet provided by the present invention;

[0024] Figure 5 A right-side partial cross-sectional schematic diagram of the first gear in a fast heat dissipation type State Grid standardized low-voltage cabinet provided by the present invention;

[0025] Figure 6 A schematic diagram of the structure of a fast heat dissipation type State Grid standardized low-voltage cabinet provided by the present invention in which the flexible bristles are separated from the fan;

[0026] Figure 7 for Figure 6 Schematic diagram of the local structure of part C in the middle.

[0027] Explanation of the numbers in the figure: 1. cabinet; 11. heat dissipation side panel; 2. driving mechanism; 21. fixed plate; 22. guide rod; 23. movable block; 24. screw rod; 25. servo motor; 3. fan; 31. air cylinder; 32. first motor; 33. rotating shaft; 34. fan blade; 4. mounting block; 41. connecting rod; 42. first brush plate; 43. flexible bristles; 44. second rack; 45. first slide groove; 46. second brush plate; 47. pull rope; 48. roller; 49. second compression spring; 5. first gear; 6. push rod; 61. first rack; 62. limit block; 63. stop block; 64. first compression spring; 7. support plate; 71. second slide groove. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up-down-left-right-front-back...) are only used to explain the relative position relationship - movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0031] like Figure 1-Figure 7As shown, a fast heat dissipation type State Grid standardized low-voltage cabinet includes a cabinet body 1, and a driving mechanism 2 is arranged in the cabinet body 1; the driving mechanism 2 includes a fixed plate 21 fixed in the cabinet body 1, and a guide rod 22 is fixedly connected to the fixed plate 21, and a movable block 23 that slides up and down along the guide rod 22 is slidably connected to the guide rod 22, and a fan 3 is installed on the movable block 23, and a screw rod 24 is rotatably connected to the fixed plate 21, and the screw rod 24 is arranged parallel to the guide rod 22; a threaded through hole is opened on the movable block 23, and the screw rod 24 passes through the movable block 23 and is threadedly matched with the threaded through hole so that the screw rod 24 and the movable block 23 form a screw rod 24 nut transmission, and a servo motor 25 is installed on the fixed plate 21, and the servo motor 25 is transmission-connected to the end of the screw rod 24 to drive the screw rod 24 to rotate forward and reverse.

[0032] The servo drives the screw rod 24 to rotate, and the screw rod 24 cooperates with the movable block 23 to drive the movable block 23 to move up and down along the screw rod 24, driving the fan 3 to move up and down, so that the fan 3 moves up and down to blow or exhaust air to the electrical components in the cabinet 1. The up and down movement of the fan 3 makes the up and down arrangement of the hot air flow in the cabinet 1 more comprehensive, so that the heat generated by the internal electrical components can be discharged, so that the internal heat is more efficient and uniform. The movable block 23 is driven to move up and down by the forward and reverse rotation of the servo motor 25, and the up and down movement stroke of the movable block 23 is controlled by the servo motor 25, so as to ensure the up and down position accuracy of the movable block 23.

[0033] The guide rod 22 is arranged vertically, and the fixing plate 21 is fixed to the upper end of the guide rod 22. The fan 3 includes a wind tube 31 and a first motor 32 installed in the wind tube 31. A rotating shaft 33 is rotatably connected in the wind tube 31, and a fan blade 34 is fixedly connected to the shaft wall of the rotating shaft 33. The output shaft of the first motor 32 is transmission-connected with the rotating shaft 33 to drive the rotating shaft 33 to rotate and drive the fan blade 34 to rotate. The rotating shaft 33 is driven by the first motor 32 to rotate, and the rotating shaft 33 rotates to drive the fan blade 34 to rotate, thereby forming an airflow, which is blown into the cabinet 1 to dissipate heat for the internal electrical components, and the heat dissipation gas is discharged to the outside of the cabinet 1 to take out the heat in the cabinet 1 for heat dissipation.

[0034] The cabinet 1 is fixedly connected with heat dissipation side plates 11 on both sides, and heat dissipation grille holes are opened on the heat dissipation side plates 11. The drive mechanism 2 is provided with two groups, and the two groups of drive mechanisms 2 are respectively located in the cabinet 1 near the side plates on both sides of the cabinet 1, so that the electrical components inside the cabinet 1 are located between the fans 3 in the two groups of drive mechanisms 2. The two fans 3 are driven by the two groups of drive mechanisms 2 to work together, one of the fans 3 delivers air into the cabinet 1, and the other fan 3 discharges the air carrying heat in the cabinet 1, so that the heat inside the cabinet 1 can be discharged as soon as possible.

[0035] The fans 3 on the movable blocks 23 in the two sets of the driving mechanisms 2 are relatively coaxially arranged, and the blowing wind directions of the two fans 3 are the same. The fans 3 in the two sets of the driving mechanisms 2 are relatively arranged so that the heat dissipation airflow forms a coherent airflow that crosses the electrical components in the cabinet 1, thereby improving the heat dissipation effect.

[0036] The fixing plate 21 is provided with a mounting block 4, the lower end of which is fixedly connected with a connecting rod 41, the connecting rod 41 extends downward to the air outlet side of the fan 3 and is fixedly connected with a first brush plate 42, the first brush plate 42 is fixedly connected with flexible bristles 43 facing the fan 3, and the flexible bristles 43 are used to fit on the blades 34 of the fan 3 to clean the surface of the blades 34. When the blades 34 are in use, dust easily accumulates on the surface of the fan 3, and the flexible bristles 43 contact the blades 34, so that the flexible bristles 43 scrape off the dust on the surface of the blades 34 during the rotation of the blades 34, thereby avoiding dust accumulation on the surface of the blades 34.

[0037] The fixed plate 21 is rotatably connected to a first gear 5, the fixed plate 21 is slidably connected to a push rod 6 and the push rod 6 passes through the fixed plate 21, the push rod 6 is fixedly connected to a first rack 61, and the first rack 61 is meshed with the first gear 5 through meshing teeth to form a gear-rack transmission; the mounting block 4 is slidably matched with the fixed plate 21, the mounting block 4 is fixedly connected to a second rack 44, and the second rack 44 is meshed with the first gear 5 through meshing teeth to form a gear-rack transmission, the push rod 6 and the movable block 23 are arranged relative to each other so that the movable block 23 approaches the push rod 6 and pushes the push rod 6 away from the fixed plate 21. The fan 3 blows air to discharge the heat in the cabinet 1, and at the same time, the servo motor 25 drives the screw 24 to rotate, thereby driving the movable block 23 to move up and down, and then driving the fan 3 to move up and down to extract or blow air from the gas inside the cabinet 1. When the movable block 23 moves close to the fixed plate 21, the movable block 23 abuts against the lower end of the push rod 6 and pushes the push rod 6 upward. During the upward movement of the push rod 6, the first gear 5 drives the mounting block 4 to move. The movement of the mounting block 4 drives the connecting rod 41 to move toward the direction of the wind tube 31, thereby driving the flexible bristles 43 on the connecting rod 41 to move toward the wind tube 31 and extend into the wind tube 31, so that the bristles abut against the fan blades. The surface of the rotating fan blade 34 is cleaned. Since the bristles are in contact with the fan blade 34 from the air outlet side, the inclined surface of the fan blade 34 abuts against the flexible bristles 43, so that the flexible bristles 43 are bent and deformed to clean the surface without causing the bristles to be damaged; and when the movable block 23 moves downward, the top rod 6 moves downward, thereby transmitting the first gear 5 to make the mounting block 4 move away from the fan 3, and then the flexible bristles 43 are taken away from the air duct 31, so as to prevent the air duct 31 from moving downward and scraping the flexible bristles 43, thereby realizing that in the process of the fan 3 cooling the electrical components in the cabinet 1 up and down, the flexible bristles 43 are automatically driven to intermittently clean the surface of the fan blade 34.

[0038] The fixing plate 21 is fixedly connected with a support plate 7, and the support plate 7 is provided with a second slide groove 71, and the mounting block 4 is slidably connected in the second slide groove 71. The mounting block 4 is supported by the support plate 7 and slidably cooperates, so that the mounting block 4 can reciprocate along the support plate 7.

[0039] The upper end of the push rod 6 is fixedly connected to a limit block 62, and the lower end of the push rod 6 is fixedly connected to a stop block 63, which is located below the fixed plate 21 and a first compression spring 64 is provided between the stop block 63 and the fixed plate 21. By providing the limit block 62, the downward movement stroke of the push rod 6 is limited, and the first compression spring 64 is provided to provide an elastic force to drive the stop block 63 to move downward, so that when the movable block 23 moves downward, the push rod 6 can move downward and reset.

[0040] A first slide groove 45 is provided in the connecting rod 41, and a second brush plate 46 is slidably connected in the first slide groove 45. The second brush plate 46 and the first brush plate 42 are both arranged vertically. The second brush plate 46 is fixedly connected to a side of the fan 3, and the flexible bristles 43 on the second brush plate 46 are arranged overlapping with the flexible bristles 43 on the first brush plate 42. The second brush plate 46 is transmission-connected to the support plate 7 so that when the connecting rod 41 moves toward the wind tube 31, it drives the second brush plate 46 to move upward so that the second brush plate 46 moves upward and unfolds relative to the first brush plate 42. When the fan 3 is close to the fixed plate 21, the connecting rod 41 is driven to move towards the direction of the wind tube 31, so that the bristles on the first brush plate 42 extend into the wind tube 31 to clean the fan blades 34. At the same time, the connecting rod 41 moves towards the direction of the wind tube 31 to drive the second brush plate 46 to move upward, so that the flexible bristles 43 on the second brush plate 46 move upward, so that the flexible bristles 43 on the second brush plate 46 are unfolded relative to the flexible bristles 43 on the first brush plate 42 to form a wider cleaning space, so that the unfolded flexible bristles 43 can clean the entire surface of the fan blades 34, thereby expanding the cleaning area, so that the entire surface of the fan blades 34 can be cleaned; and the flexible bristles 43 are only expanded when they are extended into the wind tube 31, and the second brush plate 46 moves downward when it is not extended into the wind tube 31, so that the flexible bristles 43 are folded and contracted, and the vertical width formed by the flexible bristles 43 is reduced to avoid interference with the wind tube 31 during movement.

[0041] A pull rope 47 is fixedly connected to the upper end of the second brush plate 46, and a roller 48 is rotatably connected to the connecting rod 41. The end of the pull rope 47 away from the second brush plate 46 passes around the roller 48 and is fixedly connected to the supporting plate 7. A second compression spring 49 is provided in the connecting rod 41, and the lower end of the second compression spring 49 abuts against the end of the second brush plate 46. Therefore, when the connecting rod 41 moves toward the wind tube 31, the roller 48 is driven to move toward the wind tube 31, and the pull rope 47 pulls the second brush plate 46 upward to move the second brush plate 46 upward; and when the connecting rod 41 moves away from the wind tube 31, the second brush plate 46 moves downward under the elastic force of the second compression spring 49, so that the flexible bristles 43 on the second brush plate 46 overlap with the flexible bristles 43 on the first brush plate 42.

[0042] The parts not involved in this technical solution can be implemented by using existing technologies.

[0043] The above shows and describes the basic principles, main features and characteristics of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of the present invention to be protected includes the attached claims and their equivalents.

Claims

1. A fast heat dissipation type State Grid standardized low-voltage cabinet, characterized by: The invention comprises a cabinet (1), wherein a driving mechanism (2) is arranged in the cabinet (1); the driving mechanism (2) comprises a fixed plate (21) fixed in the cabinet (1), a guide rod (22) fixedly connected to the fixed plate (21), a movable block (23) sliding up and down along the guide rod (22) slidably connected to the guide rod (22), a fan (3) being mounted on the movable block (23), a screw rod (24) rotatably connected to the fixed plate (21), and the The screw rod (24) and the guide rod (22) are arranged in parallel; a threaded through hole is provided on the movable block (23); the screw rod (24) passes through the movable block (23) and is threadably matched with the threaded through hole so that the screw rod (24) and the movable block (23) form a screw rod (24) nut transmission; a servo motor (25) is installed on the fixed plate (21); the servo motor (25) is in transmission connection with the end of the screw rod (24) to drive the screw rod (24) to rotate forward and reverse; The guide rod (22) is arranged vertically, and the fixing plate (21) is fixed to the upper end of the guide rod (22); the fan (3) comprises a wind tube (31) and a first motor (32) installed in the wind tube (31); a rotating shaft (33) is rotatably connected in the wind tube (31), and a fan blade (34) is fixedly connected to the shaft wall of the rotating shaft (33); an output shaft of the first motor (32) is transmission-connected to the rotating shaft (33) to drive the rotating shaft (33) to rotate and drive the fan blade (34) to rotate; A mounting block (4) is mounted on the fixing plate (21), a connecting rod (41) is fixedly connected to the lower end of the mounting block (4), the connecting rod (41) extends downward to the air outlet side of the fan (3) and is fixedly connected to a first brush plate (42), the first brush plate (42) is fixedly connected to a side facing the fan (3) with flexible bristles (43), and the flexible bristles (43) are used to fit on the fan blades (34) of the fan (3) to clean the surface of the fan blades (34); The fixed plate (21) is rotatably connected to a first gear (5), the fixed plate (21) is slidably connected to a push rod (6) and the push rod (6) passes through the fixed plate (21), the push rod (6) is fixedly connected to a first rack (61), and the first rack (61) and the first gear (5) are meshed through meshing teeth to form a gear rack transmission; the mounting block (4) and the fixed plate (21) are slidably matched, the mounting block (4) is fixedly connected to a second rack (44), and the second rack (44) and the first gear (5) are meshed through meshing teeth to form a gear rack transmission, and the push rod (6) and the movable block (23) are arranged relative to each other so that the movable block (23) pushes the push rod (6) away from the fixed plate (21) after approaching the push rod (6).

2. According to claim 1, a fast heat dissipation type state grid standardized low-voltage cabinet is characterized by: The cabinet (1) is fixedly connected to heat dissipation side panels (11) on both sides, and the heat dissipation side panels (11) are provided with heat dissipation grille holes. The drive mechanism (2) is provided with two groups, and the two groups of drive mechanisms (2) are respectively located in the cabinet (1) near the side panels on both sides of the cabinet (1), so that the electrical components inside the cabinet (1) are located between the fans (3) in the two groups of drive mechanisms (2).

3. A fast heat dissipation type State Grid standardized low-voltage cabinet according to claim 2, characterized in that: The fans (3) on the movable blocks (23) in the two groups of the driving mechanisms (2) are relatively coaxially arranged, and the blowing directions of the two fans (3) are the same.

4. According to claim 1, a fast heat dissipation type state grid standardized low-voltage cabinet is characterized by: The fixing plate (21) is fixedly connected to a support plate (7), the support plate (7) is provided with a second slide groove (71), and the mounting block (4) is slidably connected in the second slide groove (71); the upper end of the push rod (6) is fixedly connected to a limit block (62), the lower end of the push rod (6) is fixedly connected to a stop block (63), the stop block (63) is located below the fixing plate (21), and a first compression spring (64) is provided between the stop block (63) and the fixing plate (21).

5. A fast heat dissipation type state grid standardized low-voltage cabinet according to claim 4, characterized in that: The connecting rod (41) is provided with a first slide groove (45), and a second brush plate (46) is slidably connected to the first slide groove (45). The second brush plate (46) and the first brush plate (42) are both arranged vertically. The second brush plate (46) is fixedly connected with flexible bristles (43) on the side close to the fan (3), and the flexible bristles (43) on the second brush plate (46) and the flexible bristles (43) on the first brush plate (42) are arranged overlappingly. The second brush plate (46) is transmission-connected to the supporting plate (7) so that when the connecting rod (41) moves toward the wind tube (31), the second brush plate (46) is driven to move upward, so that the second brush plate (46) moves upward relative to the first brush plate (42) and is unfolded.

6. A fast heat dissipation type State Grid standardized low-voltage cabinet according to claim 5, characterized in that: A pull rope (47) is fixedly connected to the upper end of the second brush plate (46), and a roller (48) is rotatably connected to the connecting rod (41). The end of the pull rope (47) away from the second brush plate (46) passes around the roller (48) and is fixedly connected to the support plate (7). A second compression spring (49) is provided in the connecting rod (41), and the lower end of the second compression spring (49) abuts against the end of the second brush plate (46).

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