MNS type low-voltage draw-out power distribution cabinet

Abstract

The invention belongs to the technical field of power distribution cabinets, and discloses an MNS type low-voltage draw-out type power distribution cabinet, which comprises a power distribution cabinet main body, separation cabinets are uniformly arranged in the power distribution cabinet main body, the separation cabinets are in sliding connection with the power distribution cabinet main body, and a plurality of cooling assemblies are arranged on the side wall of the power distribution cabinet main body. The cooling assembly comprises a cooling box fixedly installed on the side wall of the power distribution cabinet body, heat dissipation holes are evenly formed in the side wall of the cooling box, a cooling fan is installed in the cooling box and arranged on one side of the separation cabinet, and the heat dissipation holes are evenly distributed and obliquely arranged downwards, so that rainwater is prevented from entering, meanwhile, mosquitoes can be effectively prevented from invading, and the service life of the power distribution cabinet is prolonged. And the potential safety hazards such as short circuit and the like caused by damage to electronic components due to mosquito invasion into the power distribution cabinet are reduced, and the safety of the power distribution cabinet is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of power distribution cabinets, and in particular relates to an MNS type low-voltage drawable power distribution cabinet. Background Art

[0002] MNS low-voltage withdrawable power distribution cabinet is an advanced low-voltage switch cabinet. It combines the needs of the modern power industry and refers to the design of foreign MNS series low-voltage switch cabinets. It has been improved and developed.

[0003] After searching, such as patent: CN217984138U, a MNS AC withdrawable low-voltage power distribution cabinet, including a power distribution cabinet body, a temperature detection device, a detection head, a separation cabinet and a cooling device. A separation cabinet is arranged inside the power distribution cabinet body, and a main steel plate is arranged in the internal structure of the separation cabinet. An insulating layer is arranged on one side of the main steel plate. A temperature detection device is arranged at the top of the power distribution cabinet body. The temperature can be detected by the temperature detection device arranged at the top of the power distribution cabinet body and the detection head arranged at the output end inside the power distribution cabinet body. When the temperature is too high, the driving motor in the internal structure of the cooling device can be controlled to operate, thereby driving the rotating fan fixedly connected to the output end to rotate, and cooperating with the operation of the condensing device and the condensing tube arranged at the output end, the electrical equipment can be cooled under the rotation of the rotating fan to ensure that the electrical equipment can operate for a long time and avoid being affected by excessive temperature;

[0004] In the current design of MNS low-voltage withdrawable distribution cabinets, some heat dissipation holes are usually designed to ensure that the equipment can effectively dissipate heat. Although these heat dissipation holes are crucial to ensure the normal operation of the distribution cabinet and the stable performance of the equipment, they will also become a way for small insects such as mosquitoes to invade the interior of the distribution cabinet, which will not only damage the electronic components inside the distribution cabinet, but may also cause safety hazards such as circuit short circuits. Summary of the invention

[0005] The object of the present invention is to provide an MNS type low-voltage withdrawable power distribution cabinet to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention provides the following technical solution: an MNS type low-voltage withdrawable power distribution cabinet, comprising a power distribution cabinet body, wherein separation cabinets are evenly installed inside the power distribution cabinet body, wherein the separation cabinets are slidably connected to the power distribution cabinet body, and a plurality of cooling components are arranged on the side wall of the power distribution cabinet body;

[0007] The cooling component includes a cooling box fixedly mounted on the side wall of the power distribution cabinet body, the side wall of the cooling box is evenly provided with heat dissipation holes, a cooling fan is installed inside the cooling box, and the cooling fan is arranged on one side of the separation cabinet;

[0008] The heat dissipation hole is arranged to be inclined downward, and a blowing component and a scraping component are respectively arranged on both sides of the heat dissipation hole.

[0009] As a further technical solution of the present invention, the blowing assembly includes a blowing plate arranged on one side of the heat dissipation hole, the blowing plate is evenly provided with blowing holes inside, the bottom end of the blowing plate is fixedly connected with a connecting pipe, the bottom end of the connecting pipe is fixedly connected with an air bag, the air bag is installed inside the cooling box, and the top of the air bag is provided with an air storage assembly;

[0010] The blowing plate is slidably mounted inside the cooling box, and the top of the blowing plate is meshingly connected with a first reciprocating screw rod, one end of which is mounted with a motor.

[0011] As a further technical solution of the present invention, a limiting ring is fixedly installed on the outer wall of the connecting pipe, and an elastic rope is fixedly connected to the outer wall of the limiting ring, and the elastic rope is embedded in the inner wall of the cooling box.

[0012] As a further technical solution of the present invention, a push plate is provided on one side of the airbag, the push plate is slidably installed inside the cooling box, and a spring is installed between the push plate and the cooling box.

[0013] As a further technical solution of the present invention, the air storage assembly includes an air storage tube fixedly connected to the top of the airbag, one side of the air storage tube is fixedly connected to an air intake pipe, the inner wall of the top of the air storage tube is slidably connected to a piston head, the top of the piston head is fixedly installed with a piston rod, the inner wall of the piston rod is threadedly connected with a second reciprocating screw, the top of the second reciprocating screw is fixedly installed with a second bevel gear, one side of the second bevel gear is meshingly connected with a first bevel gear, and the first bevel gear is fixedly installed at one end of the first reciprocating screw.

[0014] As a further technical solution of the present invention, the outer walls of the air storage pipe and the air intake pipe are both installed with one-way valves.

[0015] As a further technical solution of the present invention, the scraping assembly includes a scraping plate arranged on the other side of the heat dissipation hole, a movable seat is installed on the top of the scraping plate, and the movable seat is fixedly installed on one side of the blowing plate.

[0016] As a further technical solution of the present invention, the inner wall of the movable seat is slidably connected with a slider, the slider is installed on the top of the scraper plate, and both sides of the slider are fixedly connected with guide shafts.

[0017] As a further technical solution of the present invention, the slider is magnetically connected to both sides of the inner wall of the moving seat.

[0018] As a further technical solution of the present invention, a rotating shaft is rotatably installed on the inner wall of the slider, a coil spring is installed between the rotating shaft and the slider, one end of the rotating shaft is fixedly connected to the scraper plate, and limiting rods are provided on both sides of the scraper plate, and the limiting rods are fixedly installed on the side walls of the cooling box.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The present invention evenly distributes the heat dissipation holes and sets the heat dissipation holes at an angle downward, thereby preventing rainwater from entering and effectively blocking mosquitoes from invading, reducing safety hazards such as damage to electronic components and circuit short circuits caused by mosquitoes invading the distribution cabinet, and improving the safety of the distribution cabinet.

[0021] 2. The present invention sets an air blowing assembly. When the power distribution cabinet is working, the motor is started by controlling the PLC. When the motor is started, it drives the first reciprocating screw to rotate. The rotation of the first reciprocating screw drives the movement of the air blowing plate. When the air blowing hole is located on one side of the heat dissipation hole, the gas inside the air bag is discharged from the air blowing hole through the connecting pipe to blow air into the heat dissipation hole, which helps to discharge dust and small mosquitoes inside the heat dissipation hole, keep the inside of the power distribution cabinet clean and dry, reduce the risk of failure caused by dust accumulation, and further improve the safety of the power distribution cabinet.

[0022] 3. The present invention arranges the scraping assembly. When the blowing assembly is working, the rotation of the first reciprocating screw drives the movement of the blowing plate, the movement of the blowing plate drives the movement of the moving seat, and the movement of the moving seat drives the movement of the scraping plate, so that the scraping plate reciprocates on the other side of the heat dissipation hole, which is convenient for scraping off the dust and dirt attached to the end of the heat dissipation hole, ensuring the circulation of the heat dissipation hole, so as to ensure the heat dissipation effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement in the middle;

[0026] Figure 4 It is a cross-sectional schematic diagram of another viewing angle of the overall structure of the present invention;

[0027] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0028] Figure 6 It is a structural schematic diagram of the mobile seat of the present invention;

[0029] Figure 7 It is a schematic cross-sectional view of the structure of the movable seat of the present invention;

[0030] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at point C in the middle.

[0031] In the figure: 1. Power distribution cabinet body; 2. Separation cabinet; 3. Cooling box; 4. Heat dissipation hole; 5. Cooling fan; 6. Blowing plate; 7. Blowing hole; 8. Connecting pipe; 9. Air bag; 10. First reciprocating screw; 11. Motor; 12. Moving seat; 13. Sliding block; 14. Guide shaft; 15. Rotating shaft; 16. Coil spring; 17. Scraping plate; 18. Push plate; 19. Spring; 20. Limiting ring; 21. Elastic rope; 22. First bevel gear; 23. Second bevel gear; 24. Second reciprocating screw; 25. Piston rod; 26. Piston head; 27. Gas storage pipe; 28. Inlet pipe; 29. ​​One-way valve; 30. Limiting rod. DETAILED DESCRIPTION

[0032] 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.

[0033] like Figures 1 to 8 As shown, in an embodiment of the present invention, an MNS type low-voltage withdrawable power distribution cabinet comprises a power distribution cabinet body 1, a separation cabinet 2 is evenly installed inside the power distribution cabinet body 1, the separation cabinet 2 is slidably connected to the power distribution cabinet body 1, and a plurality of cooling components are arranged on the side wall of the power distribution cabinet body 1;

[0034] The cooling component includes a cooling box 3 fixedly mounted on the side wall of the power distribution cabinet body 1, the side wall of the cooling box 3 is evenly provided with heat dissipation holes 4, a cooling fan 5 is installed inside the cooling box 3, and the cooling fan 5 is arranged on one side of the separation cabinet 2;

[0035] The heat dissipation hole 4 is arranged to be tilted downward, and a blowing component and a scraping component are respectively arranged on both sides of the heat dissipation hole 4.

[0036] The cooling fan 5 is driven by a built-in motor, which is a common technical means and will not be described in detail here;

[0037] Existing: CN217984138U discloses an MNS AC withdrawable low-voltage power distribution cabinet. This patent discloses the power distribution cabinet body 1 and the separation cabinet 2 proposed in this application document. This technical means will not be described in detail here;

[0038] The side of the power distribution cabinet body 1 away from the cooling box 3 is also uniformly provided with heat dissipation holes 4, and the inner walls on both sides of the separation cabinet 2 are provided with through holes. The heat dissipation holes 4 on both sides of the power distribution cabinet body 1 are connected with the through holes on both sides of the separation cabinet 2, so that gas can flow to dissipate heat;

[0039] By setting the cooling component, when the power distribution cabinet is working, the cooling fan 5 can be driven to rotate by the built-in motor of the cooling fan 5, so that the external air enters the power distribution cabinet body 1 through the heat dissipation hole 4 on one side of the cooling fan 5, passes through the separation cabinet 2, and finally is discharged from the heat dissipation hole 4 on the other side of the power distribution cabinet body 1, so as to cool the power distribution cabinet body 1 and the separation cabinet 2;

[0040] The heat dissipation holes 4 are evenly distributed, which can initially prevent mosquitoes from entering. The heat dissipation holes 4 are tilted downward to prevent rainwater from entering and can also effectively block the invasion of mosquitoes, thereby reducing the potential safety hazards of mosquitoes invading the distribution cabinet and causing damage to electronic components and circuit short circuits, thereby improving the safety of the distribution cabinet.

[0041] like Figures 1 to 7 As shown, the blowing assembly includes a blowing plate 6 arranged on one side of the heat dissipation hole 4, and the blowing holes 7 are evenly opened inside the blowing plate 6. The bottom end of the blowing plate 6 is fixedly connected to a connecting pipe 8, and the bottom end of the connecting pipe 8 is fixedly connected to an air bag 9. The air bag 9 is installed inside the cooling box 3, and the top of the air bag 9 is provided with an air storage assembly;

[0042] The blowing plate 6 is slidably installed inside the cooling box 3 , and the top of the blowing plate 6 is meshedly connected with a first reciprocating screw 10 , and a motor 11 is installed at one end of the first reciprocating screw 10 .

[0043] The air blowing hole 7 is arranged at one end of the heat dissipation hole 4, and the two are arranged in parallel;

[0044] The air blowing plate 6 is slidably fitted with one side of the heat dissipation hole 4. When the air blowing hole 7 moves to one end of the heat dissipation hole 4, the gas is discharged. When the air blowing hole 7 does not move to one end of the heat dissipation hole 4, the gas is prevented from being discharged by the inner wall of the cooling box 3.

[0045] When the distribution cabinet is working, the motor 11 is started by the PLC control. When the motor 11 is started, it drives the first reciprocating screw 10 to rotate. The rotation of the first reciprocating screw 10 drives the movement of the blowing plate 6. When the blowing hole 7 is located on one side of the heat dissipation hole 4, the gas inside the airbag 9 is discharged from the blowing hole 7 through the connecting pipe 8 to blow air into the heat dissipation hole 4, which helps to discharge the dust and small mosquitoes inside the heat dissipation hole 4, keep the inside of the distribution cabinet clean and dry, reduce the risk of failure caused by dust accumulation, and further improve the safety of the distribution cabinet.

[0046] like Figures 1 to 7As shown, a limit ring 20 is fixedly installed on the outer wall of the connecting pipe 8 , and an elastic rope 21 is fixedly connected to the outer wall of the limit ring 20 , and the elastic rope 21 is embedded in the inner wall of the cooling box 3 .

[0047] The connecting pipe 8 is configured as a hose;

[0048] When the blowing plate 6 moves back and forth inside the cooling box 3, the movement of the blowing plate 6 drives the movement of the connecting pipe 8, and the movement of the connecting pipe 8 drives the movement of the limiting ring 20. The movement of the limiting ring 20 is stretched by the elastic rope 21, and the elastic potential energy of the elastic rope 21 enables the limiting ring 20 to limit the connecting pipe 8 to prevent the connecting pipe 8 from contacting the cooling fan 5, so as to ensure the safety of the operation of the device.

[0049] like Figure 6 and Figure 7 As shown, a push plate 18 is provided on one side of the airbag 9 , and the push plate 18 is slidably installed inside the cooling box 3 , and a spring 19 is installed between the push plate 18 and the cooling box 3 .

[0050] The push plate 18 is pushed by the elastic potential energy of the spring 19, so that the push plate 18 always has a tendency to move toward the side of the airbag 9, so that when the blowing hole 7 moves to one end of the heat dissipation hole 4, the gas inside the airbag 9 is assisted to be discharged, thereby improving the cleaning effect of the inner wall of the heat dissipation hole 4.

[0051] like Figure 4 and Figure 5 As shown, the air storage assembly includes an air storage tube 27 fixedly connected to the top of the airbag 9, one side of the air storage tube 27 is fixedly connected to the air intake pipe 28, the inner wall of the top of the air storage tube 27 is slidably connected to the piston head 26, the top of the piston head 26 is fixedly installed with a piston rod 25, the inner wall of the piston rod 25 is threadedly connected to the second reciprocating screw 24, the top of the second reciprocating screw 24 is fixedly installed with a second bevel gear 23, one side of the second bevel gear 23 is meshingly connected to the first bevel gear 22, and the first bevel gear 22 is fixedly installed at one end of the first reciprocating screw 10.

[0052] When the blowing assembly is working, the rotation of the first reciprocating screw 10 drives the rotation of the first bevel gear 22, the rotation of the first bevel gear 22 drives the rotation of the second bevel gear 23, the rotation of the second bevel gear 23 drives the rotation of the second reciprocating screw 24, the rotation of the second reciprocating screw 24 drives the piston rod 25 to move back and forth up and down, the movement of the piston rod 25 drives the piston head 26 to slide in the inner wall of the air storage pipe 27, and is connected through the air inlet pipe 28, drawing external gas into the air storage pipe 27 and discharging it into the airbag 9, so that the airbag 9 stores air, which is convenient for the continuous operation of the blowing assembly.

[0053] like Figure 4 and Figure 5 As shown, the outer walls of the air storage pipe 27 and the air intake pipe 28 are both installed with a one-way valve 29.

[0054] The one-way valve 29 prevents gas from flowing back, thereby improving the stability during gas storage.

[0055] like Figure 3 , Figure 6 and Figure 7 As shown, the scraping assembly includes a scraping plate 17 arranged on the other side of the heat dissipation hole 4, and a moving seat 12 is installed on the top of the scraping plate 17, and the moving seat 12 is fixedly installed on one side of the blowing plate 6.

[0056] When the blowing assembly is working, the rotation of the first reciprocating screw 10 drives the movement of the blowing plate 6, the movement of the blowing plate 6 drives the movement of the moving seat 12, and the movement of the moving seat 12 drives the movement of the scraper plate 17, so that the scraper plate 17 reciprocates on the other side of the heat dissipation hole 4, so as to scrape off the dust and dirt attached to the end of the heat dissipation hole 4, ensure the circulation of the heat dissipation hole 4, so as to ensure the heat dissipation effect of the device.

[0057] like Figure 3 , Figure 7 and Figure 8 As shown, a slider 13 is slidably connected to the inner wall of the movable seat 12 . The slider 13 is installed on the top of the scraping plate 17 . Both sides of the slider 13 are fixedly connected to guide shafts 14 .

[0058] The scraping plate 17 is located on one side of the blowing hole 7 and is staggered therewith;

[0059] The scraping plate 17 is located on a side away from the traveling direction of the blowing plate 6, so that the blowing holes 7 blow air to the scraping plate 17 first and then scrape the dust;

[0060] The side wall of the cooling box 3 is provided with a slide groove for the movable seat 12 to slide, and the guide shaft 14 is located inside the slide groove;

[0061] When the scraping assembly is working, the movement of the movable seat 12 drives the movement of the slider 13, and the movement of the slider 13 drives the movement of the guide shaft 14. When the guide shaft 14 slides to the end of the slide groove, it is forced to move toward the movable seat 12. At the same time, the movement of the guide shaft 14 drives the movement of the slider 13, and the movement of the slider 13 drives the movement of the scraper plate 17, so that the scraper plate 17 moves to the other side of the blowing hole 7, and moves its position on both sides so that it is always located on the side away from the travel direction of the blowing plate 6, so that the device blows air first and then scrapes the dust. The combined use of the two helps to restore the patency of the heat dissipation hole 4, thereby improving the heat dissipation efficiency of the distribution cabinet.

[0062] like Figure 8 As shown, the slider 13 and the inner wall of the movable seat 12 are both magnetically connected.

[0063] When the slider 13 moves on the inner wall of the moving seat 12, the magnetic connection between the two allows the scraper plate 17 to remain stable during the movement.

[0064] like Figure 7 and Figure 8 As shown, a rotating shaft 15 is rotatably installed on the inner wall of the slider 13, a coil spring 16 is installed between the rotating shaft 15 and the slider 13, one end of the rotating shaft 15 is fixedly connected to a scraper plate 17, and limit rods 30 are provided on both sides of the scraper plate 17, and the limit rods 30 are fixedly installed on the side walls of the cooling box 3.

[0065] When the scraper plate 17 moves to one end of the limit rod 30 and contacts it, the scraper plate 17 is forced to rotate toward the end away from the limit rod 30. At the same time, the rotating shaft 15 rotates in the inner wall of the slider 13, causing the coil spring 16 to deform and store elastic potential energy. The elastic potential energy is released by the coil spring 16 to make the scraper plate 17 shake, which helps to shake off impurities attached to its surface.

[0066] Working principle and usage process:

[0067] When the power distribution cabinet is working, the cooling fan 5 can be driven to rotate by the built-in motor of the cooling fan 5, so that the external air enters the power distribution cabinet body 1 through the heat dissipation hole 4 on one side of the cooling fan 5, passes through the separation cabinet 2, and finally is discharged from the heat dissipation hole 4 on the other side of the power distribution cabinet body 1, so as to cool the power distribution cabinet body 1 and the separation cabinet 2;

[0068] When the power distribution cabinet is working, the motor 11 is started by the PLC control. When the motor 11 is started, the first reciprocating screw 10 is driven to rotate. The rotation of the first reciprocating screw 10 drives the movement of the blowing plate 6. When the blowing hole 7 is located on one side of the heat dissipation hole 4, the gas inside the airbag 9 is discharged from the blowing hole 7 through the connecting pipe 8 to blow air into the heat dissipation hole 4, so as to keep the inside of the power distribution cabinet clean and dry.

[0069] When the blowing hole 7 is located at one side of the heat dissipation hole 4, the push plate 18 is pushed by the elastic potential energy of the spring 19, so that the push plate 18 always has a tendency to move toward the side of the airbag 9, so that when the blowing hole 7 moves to one end of the heat dissipation hole 4, the gas inside the airbag 9 is assisted to be discharged;

[0070] At the same time, the movement of the blowing plate 6 drives the movement of the connecting pipe 8, and the movement of the connecting pipe 8 drives the movement of the limiting ring 20. The movement of the limiting ring 20 is stretched by the elastic rope 21, and the elastic potential energy of the elastic rope 21 enables the limiting ring 20 to limit the connecting pipe 8.

[0071] At the same time, the rotation of the first reciprocating screw 10 drives the rotation of the first bevel gear 22, the rotation of the first bevel gear 22 drives the rotation of the second bevel gear 23, the rotation of the second bevel gear 23 drives the rotation of the second reciprocating screw 24, the rotation of the second reciprocating screw 24 drives the piston rod 25 to move up and down, the movement of the piston rod 25 drives the piston head 26 to slide in the inner wall of the air storage pipe 27, and is connected through the air inlet pipe 28, and the external gas is drawn into the air storage pipe 27 and discharged into the airbag 9, so that the airbag 9 stores air;

[0072] At the same time, the movement of the blowing plate 6 drives the movement of the moving seat 12, and the movement of the moving seat 12 drives the movement of the scraping plate 17, so that the scraping plate 17 reciprocates on the other side of the heat dissipation hole 4, so as to scrape away the dust and dirt attached to the end of the heat dissipation hole 4;

[0073] At the same time, the movement of the moving seat 12 drives the movement of the slider 13, and the movement of the slider 13 drives the movement of the guide shaft 14. When the guide shaft 14 slides to the end of the slide groove, it is forced to move into the moving seat 12. At the same time, the movement of the guide shaft 14 drives the movement of the slider 13, and the movement of the slider 13 drives the movement of the scraper plate 17, so that the scraper plate 17 moves to the other side of the blowing hole 7, and moves its position on both sides so that it is always located on the side away from the travel direction of the blowing plate 6;

[0074] When the scraper plate 17 moves to one end of the limit rod 30 and contacts it, the scraper plate 17 is forced to rotate toward the end away from the limit rod 30. At the same time, the rotating shaft 15 rotates in the inner wall of the slider 13, causing the coil spring 16 to deform and store elastic potential energy. The elastic potential energy is released by the coil spring 16 to make the scraper plate 17 shake, thereby shaking off impurities attached to its surface.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An MNS type low voltage withdrawable power distribution cabinet, comprising a power distribution cabinet body (1), characterized in that: Separation cabinets (2) are evenly installed inside the power distribution cabinet body (1), the separation cabinets (2) are slidably connected to the power distribution cabinet body (1), and a plurality of cooling components are arranged on the side wall of the power distribution cabinet body (1); The cooling component comprises a cooling box (3) fixedly mounted on the side wall of the power distribution cabinet body (1), the side wall of the cooling box (3) being evenly provided with heat dissipation holes (4), a cooling fan (5) being installed inside the cooling box (3), and the cooling fan (5) being arranged on one side of the separation cabinet (2); The heat dissipation hole (4) is arranged to be inclined downward, and a blowing component and a scraping component are respectively arranged on both sides of the heat dissipation hole (4).

2. According to claim 1, a MNS type low voltage withdrawable power distribution cabinet is characterized in that: The blowing assembly comprises a blowing plate (6) arranged on one side of the heat dissipation hole (4), the blowing plate (6) is evenly provided with blowing holes (7), the bottom end of the blowing plate (6) is fixedly connected to a connecting pipe (8), the bottom end of the connecting pipe (8) is fixedly connected to an air bag (9), the air bag (9) is installed inside the cooling box (3), and the top end of the air bag (9) is provided with an air storage assembly; The blowing plate (6) is slidably mounted inside the cooling box (3); the top of the blowing plate (6) is meshingly connected with a first reciprocating screw (10); a motor (11) is mounted at one end of the first reciprocating screw (10).

3. According to claim 2, the MNS type low voltage withdrawable power distribution cabinet is characterized in that: A limit ring (20) is fixedly mounted on the outer wall of the connecting pipe (8), an elastic rope (21) is fixedly connected to the outer wall of the limit ring (20), and the elastic rope (21) is embedded in the inner wall of the cooling box (3).

4. According to claim 2, the MNS type low voltage withdrawable power distribution cabinet is characterized in that: A push plate (18) is provided on one side of the air bag (9), and the push plate (18) is slidably installed inside the cooling box (3). A spring (19) is installed between the push plate (18) and the cooling box (3).

5. The MNS type low voltage withdrawable power distribution cabinet according to claim 2 is characterized in that: The air storage assembly comprises an air storage pipe (27) fixedly connected to the top of the air bag (9), one side of the air storage pipe (27) is fixedly connected to an air intake pipe (28), the inner wall of the top of the air storage pipe (27) is slidably connected to a piston head (26), the top of the piston head (26) is fixedly mounted with a piston rod (25), the inner wall of the piston rod (25) is threadedly connected to a second reciprocating screw (24), the top of the second reciprocating screw (24) is fixedly mounted with a second bevel gear (23), one side of the second bevel gear (23) is meshingly connected to a first bevel gear (22), and the first bevel gear (22) is fixedly mounted on one end of the first reciprocating screw (10).

6. The MNS low-voltage withdrawable power distribution cabinet according to claim 5 is characterized in that: The outer walls of the air storage pipe (27) and the air intake pipe (28) are both installed with a one-way valve (29).

7. The MNS low-voltage withdrawable power distribution cabinet according to claim 1 is characterized in that: The scraping assembly comprises a scraping plate (17) arranged on the other side of the heat dissipation hole (4), a movable seat (12) is installed on the top end of the scraping plate (17), and the movable seat (12) is fixedly installed on one side of the blowing plate (6).

8. The MNS low-voltage withdrawable power distribution cabinet according to claim 7 is characterized in that: The inner wall of the movable seat (12) is slidably connected with a slider (13), the slider (13) is mounted on the top of the scraper plate (17), and both sides of the slider (13) are fixedly connected with guide shafts (14).

9. The MNS low-voltage withdrawable power distribution cabinet according to claim 8 is characterized in that: The slider (13) and the inner wall of the movable seat (12) are both magnetically connected.

10. The MNS low-voltage withdrawable power distribution cabinet according to claim 8, characterized in that: A rotating shaft (15) is rotatably mounted on the inner wall of the slider (13), a coil spring (16) is mounted between the rotating shaft (15) and the slider (13), one end of the rotating shaft (15) is fixedly connected to a scraper plate (17), both sides of the scraper plate (17) are provided with limiting rods (30), and the limiting rods (30) are fixedly mounted on the side walls of the cooling box (3).

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