A portable low-voltage distribution cabinet

Abstract

This invention relates to the field of low-voltage distribution cabinet technology and discloses a movable low-voltage distribution cabinet, including a square cabinet. A threaded rod is slidably connected inside the square cabinet, a connecting plate is mounted on the threaded rod, and pulleys are mounted on the connecting plate. An air intake plate is also connected inside the square cabinet, and a steel brush for cleaning the air intake plate is also installed inside the square cabinet. An internal threaded sleeve is rotatably connected inside the square cabinet, and a synchronous belt is connected to the internal threaded sleeve. The internal threaded sleeve drives the synchronous belt to rotate, and an L-shaped block is mounted on the synchronous belt to drive the steel brush to slide. This invention uses the threaded rod to drive the connecting plate and pulleys to slide inwards into the square cabinet, thereby supporting the bottom of the square cabinet on the ground and reducing pulley wear. The steel brush contacts the air intake plate, cleaning the dust on the air intake plate, thus achieving self-cleaning of the low-voltage distribution cabinet and facilitating cleaning and maintenance.

Description

Technical Field

[0001] This invention relates to the field of low-voltage distribution cabinet technology, specifically a portable low-voltage distribution cabinet. Background Technology

[0002] Low-voltage distribution cabinets, rated for AC 50 Hz and 380 volts, are used in power distribution systems for power, lighting, and electrical energy conversion and control. These products feature strong breaking capacity, good dynamic and thermal stability, flexible electrical schemes, convenient combination, strong series compatibility and practicality, and novel structure. Maintenance of low-voltage distribution cabinets primarily ensures their normal and safe operation. Annual comprehensive maintenance is required. Maintenance should be completed with minimal power outage time, generally with the owner's power outage time determined in advance. Maintenance should begin from the low-voltage side of the transformer. After de-energizing the distribution cabinet, clean the dust inside, check the busbar and downlead connections for good condition, and check for overheating or discoloration at joints. Check the cable heads and terminals for secure connections, and check the grounding wire for corrosion and tightening of terminals. Ensure all secondary circuit connections are reliable and insulation meets requirements.

[0003] Chinese invention patent CN202110971478 discloses an outdoor low-voltage distribution cabinet. It includes a cabinet body 1, a rainproof plate 2, and a motor 3. The motor 3 is fixed to the left side of the cabinet body 1, and the output shaft of the motor 3 extends into the interior of the cabinet body 1. The rainproof plate 2 is embedded in the right side of the cabinet body 1. A dust suppression mechanism 4 for reducing sand and dust is fixed to the top of the cabinet body 1. A heat dissipation mechanism 5 for cooling the internal electrical components of the cabinet body 1 is provided on the left side of the interior of the cabinet body 1. A cleaning mechanism 6 for cleaning the dustproof screen is provided on the right side of the interior of the cabinet body 1.

[0004] However, existing portable low-voltage distribution cabinets simply add fixed casters. These casters move the cabinet to a designated location, and the casters are then fixed in place to facilitate movement and installation. However, since the cabinet is supported by only four casters, these casters often break after prolonged use. Consequently, the casters fail to move the cabinet the next time it needs to be moved. Furthermore, after extended use, dust accumulates at the air inlet at the bottom of the cabinet, making cleaning and maintenance difficult and severely impacting heat dissipation.

[0005] In view of this, the present invention proposes a portable low-voltage distribution cabinet to solve the technical problems existing in the prior art. Summary of the Invention

[0006] This invention provides a portable low-voltage distribution cabinet that reduces pulley wear and has self-cleaning benefits. It solves the problem mentioned in the background section where existing portable low-voltage distribution cabinets simply add fixed pulleys. These pulleys move the cabinet to a designated location, and the movement and installation are achieved by fixing the pulleys. However, since the cabinet is only supported by four pulleys, these pulleys often become damaged after prolonged use. Consequently, the pulleys cannot move the cabinet the next time it is moved. Furthermore, after long-term use, dust accumulates at the air inlet at the bottom of the cabinet, which is difficult to clean and maintain, severely affecting heat dissipation.

[0007] The present invention provides the following technical solution: a portable low-voltage distribution cabinet, including a square cabinet, a threaded rod slidably connected inside the square cabinet, a connecting plate installed on the threaded rod, a pulley installed on the connecting plate, an air inlet plate connected inside the square cabinet, and a steel brush for cleaning the air inlet plate installed inside the square cabinet;

[0008] The square cabinet is also rotatably connected to an internal threaded sleeve, on which a synchronous belt is connected. The internal threaded sleeve drives the synchronous belt to rotate. An L-shaped block is also installed on the synchronous belt, which drives the steel brush to slide. The square cabinet is provided with an adjustment groove. By pulling the threaded rod upward through the internal threaded sleeve, the threaded rod drives the connecting plate and pulley to slide into the square cabinet, thereby allowing the bottom of the square cabinet to be supported on the ground, thus reducing the wear of the pulley.

[0009] As an optional embodiment of the movable low-voltage distribution cabinet of the present invention, wherein: a connecting sleeve is slidably connected to the L-shaped block, the steel brush is slidably connected inside the connecting sleeve, a third spring is also installed on the L-shaped block, the third spring is connected to the connecting sleeve, a square plate is also installed on the inner wall of the square cabinet, and a first spring is installed on the square plate. The steel brush is used to clean the dust on the air intake plate, thereby realizing the self-cleaning of the low-voltage distribution cabinet, thus facilitating cleaning and maintenance.

[0010] As an optional embodiment of the movable low-voltage distribution cabinet of the present invention, the cabinet is further slidably connected to a sliding column, and a second spring is connected to the outer surface of the sliding column. The second spring is connected to the cabinet and is used to drive the air intake plate to reset. The sliding column is connected to the air intake plate, and the air intake plate opens a gap between the cabinet and the cabinet. Then, the dust is cleaned by the rapid pushing of the steel brush, allowing the dust to flow out through the gap, thereby reducing the situation of dust clogging the air intake plate.

[0011] As an optional embodiment of the movable low-voltage distribution cabinet of the present invention, wherein: a first inclined surface is provided on the square plate, and the steel brush is used to abut against the first inclined surface.

[0012] As an optional embodiment of the movable low-voltage distribution cabinet of the present invention, a first spring is installed on the inner wall of the connecting sleeve, the first spring is connected to the steel brush, and the first spring is used to drive the steel brush to reset.

[0013] As an optional embodiment of the portable low-voltage distribution cabinet of the present invention, the cabinet is further provided with a short shaft inside, a ring is fitted on the short shaft, and a striking plate is installed on the ring. The striking plate is used to strike the air intake plate. The striking plate strikes the air intake plate, causing the air intake plate to vibrate up and down. This vibration of the air intake plate is combined with the pushing and sweeping action of the steel brush, thereby further reducing the accumulation of dust on the air intake plate and achieving a good cleaning effect.

[0014] As an optional embodiment of the portable low-voltage distribution cabinet of the present invention, a second spring is installed on the connecting plate, and an extension plate is installed at the other end of the ring, wherein the second spring is used to abut against the extension plate.

[0015] As an optional solution for the portable low-voltage distribution cabinet described in this invention, the inner wall of the square cabinet is also equipped with an arc-shaped spring sheet. The arc-shaped spring sheet is connected to the extension plate. The compressed arc-shaped spring sheet releases elastic force. Since the arc-shaped spring sheet has elastic potential energy, it will repeatedly drive the extension plate to swing up and down. In turn, the extension plate drives the ring to swing, and the ring drives the striking plate to swing, thereby realizing the striking plate striking the air intake.

[0016] As an optional embodiment of the portable low-voltage distribution cabinet of the present invention, the steel brush is provided with a second inclined surface, which is used to abut against the first inclined surface.

[0017] As an optional embodiment of the movable low-voltage distribution cabinet of the present invention, a trapezoidal block is further installed on the square plate, the steel brush is used to abut against the trapezoidal block, and the second inclined surface is adapted to the trapezoidal block.

[0018] The present invention has the following beneficial effects:

[0019] 1. This portable low-voltage distribution cabinet rotates the internal threaded sleeve, causing the internal threaded sleeve to drive the threaded rod to rotate. However, the threaded rod is connected to the connecting plate, so the threaded rod does not drive the connecting plate to rotate. This causes the internal threaded sleeve to pull the threaded rod upward, and the threaded rod drives the connecting plate and pulley to slide into the cabinet, so that the bottom of the cabinet is supported on the ground, thereby reducing the wear of the pulley.

[0020] 2. This portable low-voltage distribution cabinet uses a synchronous belt to drive the L-shaped block and steel brush to slide. The steel brush contacts the air intake plate and cleans the dust on the air intake plate, thus achieving self-cleaning of the low-voltage distribution cabinet and facilitating cleaning and maintenance.

[0021] 3. In this portable low-voltage distribution cabinet, when the tension of the steel brush driven by the synchronous belt is greater than the elastic force of the first spring, the L-shaped block will drive the steel brush to squeeze the first spring to deform, and then release the compressed force through the third spring. The third spring will quickly push the connecting sleeve and the steel brush to one side, thereby increasing the cleaning force of the steel brush and allowing the steel brush to clean the air intake plate better.

[0022] 4. This portable low-voltage distribution cabinet uses a sliding steel brush to push against the first inclined surface, causing the first inclined surface to squeeze the steel brush downwards. This causes the steel brush to squeeze the air intake plate and the sliding column downwards, thus opening a gap between the air intake plate and the cabinet. Then, the steel brush quickly pushes and sweeps, allowing the dust to flow out through the gap, thereby reducing the possibility of dust clogging the air intake plate.

[0023] 5. This portable low-voltage distribution cabinet, by rotating the ring, causes the ring to drive the striking plate to swing upward, which in turn strikes the air intake plate, causing the air intake plate to vibrate up and down. This vibration of the air intake plate, combined with the pushing and sweeping of the steel brush, further reduces the accumulation of dust on the air intake plate and achieves good cleaning effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a cross-sectional view of the cabinet of the present invention.

[0026] Figure 3 This is a schematic diagram of the steel brush and L-shaped block of the present invention.

[0027] Figure 4 For the present invention Figure 3 A partial structural diagram at point A.

[0028] Figure 5 This is a schematic diagram of the structure of the air intake plate and sliding column of the present invention.

[0029] Figure 6 For the present invention Figure 4 A schematic diagram of the partial structure at point B.

[0030] In the diagram: 1. Square cabinet; 2. Adjustment groove; 3. Internal threaded sleeve; 4. Threaded rod; 5. Connecting plate; 6. Pulley; 7. Synchronous belt; 8. L-shaped block; 9. Connecting sleeve; 10. Steel brush; 11. Air inlet plate; 14. First spring; 15. Square plate; 16. First inclined plane; 17. Second inclined plane; 18. First spring piece; 19. Sliding column; 20. Second spring; 21. Striking plate; 22. Short shaft; 23. Ring; 24. Extending plate; 25. Arc-shaped spring piece; 26. Second spring piece; 27. Third spring; 28. Trapezoidal block. Detailed Implementation

[0031] 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.

[0032] Example 1

[0033] Please see Figure 1-2 A portable low-voltage distribution cabinet includes a square cabinet 1. A threaded rod 4 is slidably connected inside the square cabinet 1. A connecting plate 5 is installed on the threaded rod 4. A pulley 6 is installed on the connecting plate 5. An air inlet plate 11 is also connected inside the square cabinet 1. A steel brush 10 for cleaning the air inlet plate 11 is also installed inside the square cabinet 1.

[0034] The inside of the square cabinet 1 is also rotatably connected to an internal threaded sleeve 3, and a synchronous belt 7 is connected to the internal threaded sleeve 3. The internal threaded sleeve 3 is used to drive the synchronous belt 7 to rotate. An L-shaped block 8 is also installed on the synchronous belt 7. The L-shaped block 8 is used to drive the steel brush 10 to slide. An adjustment groove 2 is provided on the square cabinet 1.

[0035] Existing portable low-voltage distribution cabinets simply add fixed casters. These casters move the cabinet to a designated location, and the casters are then fixed in place, allowing for easy movement and installation. However, since the cabinet is supported by only four casters, these casters often wear out after prolonged use. Consequently, the casters cannot move the cabinet the next time it needs to be moved. Furthermore, dust accumulates at the bottom air inlet of the cabinet after extended use, making cleaning and maintenance difficult and severely impacting heat dissipation. Therefore, this device addresses the problems of caster damage and air inlet cleaning by incorporating sliding casters 6. These casters 6 retract into the cabinet 1, allowing the bottom of the cabinet 1 to rest on the ground, thus reducing wear and tear on the casters 6.

[0036] Easy to move: Specific details depend on Figure 2 As shown, when the cabinet 1 is moved to the designated position by the pulley 6, the internal threaded sleeve 3 is rotated, which causes the internal threaded sleeve 3 to drive the threaded rod 4 to rotate. However, the threaded rod 4 is connected to the connecting plate 5, so the threaded rod 4 does not drive the connecting plate 5 to rotate. As a result, the internal threaded sleeve 3 pulls the threaded rod 4 to slide upward. The threaded rod 4 drives the connecting plate 5 and the pulley 6 to slide into the cabinet 1, so that the bottom of the cabinet 1 is supported on the ground, thereby reducing the wear of the pulley 6.

[0037] It should be noted that the internal rotating connection of the square cabinet 1 is four internal threaded sleeves 3, and the four internal threaded sleeves 3 are connected by a timing belt 7. When one of the internal threaded sleeves 3 is rotated, the internal threaded sleeve 3 will drive the other three internal threaded sleeves 3 to rotate through the timing belt 7, thereby realizing that the four pulleys 6 move together.

[0038] Heat dissipation cleaning: According to Figure 2 As shown, when the internal threaded sleeve 3 rotates, it will also drive the synchronous belt 7 to rotate, which in turn drives the L-shaped block 8 and the steel brush 10 to slide through the synchronous belt 7. The steel brush 10 then contacts the air intake plate 11 to clean the dust on the air intake plate 11, thereby achieving self-cleaning of the low-voltage distribution cabinet and facilitating cleaning and maintenance.

[0039] Example 2

[0040] This embodiment is an improvement upon embodiment 1. For details, please refer to [link / reference]. Figure 1-4 A connecting sleeve 9 is slidably connected to the L-shaped block 8, and a steel brush 10 is slidably connected inside the connecting sleeve 9. A third spring 27 is also installed on the L-shaped block 8, and the third spring 27 is connected to the connecting sleeve 9. A square plate 15 is also installed on the inner wall of the square cabinet 1, and a first spring piece 18 is installed on the square plate 15.

[0041] Increase cleaning efforts: According to Figure 3 and Figure 4 As shown, when the timing belt 7 drives the L-shaped block 8, connecting sleeve 9 and steel brush 10 to slide to one side, since the connecting sleeve 9 is slidably connected to the L-shaped block 8, when the steel brush 10 abuts against the first spring 18, the first spring 18 will squeeze the steel brush 10 and connecting sleeve 9 to slide to the other side. When the connecting sleeve 9 slides to the other side, the connecting sleeve 9 will compress the third spring 27. When the pulling force of the timing belt 7 driving the steel brush 10 is greater than the elastic force of the first spring 18, the L-shaped block 8 will drive the steel brush 10 to squeeze the first spring 18 to deform, and then release the compressed force through the third spring 27. The third spring 27 will quickly push the connecting sleeve 9 and steel brush 10 to slide to one side, thereby increasing the cleaning force of the steel brush 10 and allowing the steel brush 10 to better clean the upper surface of the air intake plate 11.

[0042] It should be noted that six first springs 18 are installed on the square plate 15, which allows the steel brush 10 to quickly slide and clean the upper surface of the air intake plate 11 multiple times, further increasing the cleaning effect and thus achieving self-cleaning, which is convenient for cleaning and maintenance.

[0043] Example 3

[0044] This embodiment is an improvement upon embodiment 2. For details, please refer to [link / reference]. Figure 1-5 The cabinet 1 is also slidably connected to a sliding column 19. A second spring 20 is connected to the outer surface of the sliding column 19. The second spring 20 is connected to the cabinet 1. The second spring 20 is used to drive the air intake plate 11 to reset. The sliding column 19 is connected to the air intake plate 11. A first inclined surface 16 is provided on the square plate 15. The steel brush 10 is used to abut against the first inclined surface 16.

[0045] The steel brush 10 is provided with a second inclined surface 17, which is used to abut against the first inclined surface 16.

[0046] Dust removal: According to Figure 5 As shown, according to Embodiment 2, the third spring 27 is used to quickly push the connecting sleeve 9 and the steel brush 10 to one side, thereby increasing the cleaning force of the steel brush 10 and allowing it to better clean the upper surface of the air intake plate 11. However, the ventilation holes on the air intake plate 11 have limited diameters. When there is a lot of dust, the dust may clog the holes, resulting in poor cleaning performance. Therefore, this device sets the air intake plate 11 to be slidably connected to the lower end of the cabinet 1. Figure 5 As shown, during normal use, the air intake plate 11 of the cabinet 1 is pulled by the sliding column 19 and the second spring 20. The second spring 20 and the sliding column 19 pull the air intake plate 11 to fit against the lower end of the cabinet 1, so that only air can pass through the air intake plate 11. When the cabinet 1 moves and the steel brush 10 cleans the air intake plate 11, the steel brush 10 slides to the right, causing the steel brush 10 to abut against the first inclined surface 16. This causes the first inclined surface 16 to squeeze the steel brush 10 downward, which in turn squeezes the air intake plate 11 and the sliding column 19 downward. This opens a gap between the air intake plate 11 and the cabinet 1, and then the steel brush 10 quickly pushes and cleans, allowing dust to flow out through the gap, thereby reducing the possibility of dust clogging the air intake plate 11.

[0047] Example 4

[0048] This embodiment is an improvement upon embodiment 3. For details, please refer to [link / reference]. Figure 1-6 A first spring 14 is installed on the inner wall of the connecting sleeve 9. The first spring 14 is connected to the steel brush 10 and is used to drive the steel brush 10 to reset.

[0049] Inside the cabinet 1, a short shaft 22 is installed, and a ring 23 is fitted on the short shaft 22. A striking plate 21 is installed on the ring 23, and the striking plate 21 is used to strike the air intake plate 11.

[0050] Vibration dust removal: According to Figure 6 As shown, in order to further improve the flow of dust from the air intake plate 11, this embodiment has a rotating ring 23 connected inside the cabinet 1. By rotating the ring 23, the ring 23 will drive the striking plate 21 to swing upward, and then the striking plate 21 will hit the air intake plate 11, causing the air intake plate 11 to vibrate up and down. This vibration of the air intake plate 11 is combined with the pushing and sweeping of the steel brush 10, thereby further reducing the accumulation of dust on the air intake plate 11 and achieving a good cleaning effect.

[0051] Example 5

[0052] This embodiment is an improvement upon embodiment 4. For details, please refer to [link / reference]. Figure 1-6 A second spring 26 is installed on the connecting plate 5, and an extension plate 24 is installed on the other end of the ring 23. The second spring 26 is used to abut against the extension plate 24.

[0053] The inner wall of the square cabinet 1 is also equipped with an arc-shaped spring piece 25, which is connected to the protruding plate 24.

[0054] Driver: According to Figure 6 As shown, when the connecting plate 5 slides downward, the second spring piece 26 on the pulley 6 will abut against the extension plate 24, and the extension plate 24 will stretch the arc-shaped spring piece 25. When the connecting plate 5 descends to a certain extent, the second spring piece 26 will be squeezed and deformed by the extension plate 24, so that the second spring piece 26 will pass through the extension plate 24 and then release the elastic force through the compressed arc-shaped spring piece 25. Since the arc-shaped spring piece 25 has elastic potential energy, the arc-shaped spring piece 25 will repeatedly drive the extension plate 24 to swing up and down, and then drive the ring 23 to swing through the extension plate 24. The ring 23 drives the striking plate 21 to swing, thereby realizing the striking plate 21 hitting the intake plate 11.

[0055] Example 6

[0056] This embodiment is an improvement upon embodiment 4. For details, please refer to [link / reference]. Figure 1-6 A trapezoidal block 28 is also installed on the square plate 15. A steel brush 10 is used to abut against the trapezoidal block 28. The second inclined surface 17 is adapted to the trapezoidal block 28.

[0057] Up-down vibration: As described in Embodiment 4, the striking plate 21 strikes the air intake plate 11, causing the air intake plate 11 to vibrate up and down. This vibration of the air intake plate 11 is combined with the pushing and sweeping action of the steel brush 10 to further reduce the accumulation of dust on the air intake plate 11. However, the upward movement of the air intake plate 11 is only achieved by driving the striking plate 21 through a power source. In order to make the air intake plate 11 vibrate better and shake off the dust on the air intake plate 11.

[0058] In this embodiment, a trapezoidal block 28 is installed on the square plate 15, according to... Figure 5 As shown, when the steel brush 10 passes the trapezoidal block 28, the steel brush 10 will accelerate and slide to the left, and then the trapezoidal block 28 will come into contact with the steel brush 10. Since the trapezoidal block 28 is trapezoidal, the trapezoidal block 28 will first squeeze the steel brush 10 to slide downward, so that the steel brush 10 will squeeze the air intake plate 11 downward again, so that the air intake plate 11 will pull the sliding column 19 and the second spring 20 to slide downward. Then, when the steel brush 10 moves to the other side of the trapezoidal block 28, the trapezoidal block 28 will no longer squeeze the steel brush 10, so that the second spring 20 will pull the air intake plate 11 to slide upward, thereby realizing the air intake plate 11 sliding up and down again, and thus cooperating with the striking plate 21 to increase the frequency of the air intake plate 11 shaking up and down;

[0059] It should be noted that the trapezoidal block 28 and the second spring 26 are each spaced apart and will not affect each other, so that the striking plate 21 and the trapezoidal block 28 simultaneously squeeze the air intake plate 11.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A portable low-voltage distribution cabinet, characterized in that: The cabinet includes a square cabinet (1), with a threaded rod (4) slidably connected inside the square cabinet (1), a connecting plate (5) installed on the threaded rod (4), a pulley (6) installed on the connecting plate (5), an air intake plate (11) connected inside the square cabinet (1), and a steel brush (10) for cleaning the air intake plate (11) installed inside the square cabinet (1). The square cabinet (1) is also rotatably connected to an internal threaded sleeve (3), on which a synchronous belt (7) is connected. The internal threaded sleeve (3) is used to drive the synchronous belt (7) to rotate. An L-shaped block (8) is also installed on the synchronous belt (7), which is used to drive the steel brush (10) to slide. An adjustment groove (2) is provided on the square cabinet (1). A connecting sleeve (9) is slidably connected on the L-shaped block (8). The steel brush (10) is slidably connected inside the connecting sleeve (9). A third spring (27) is also installed on the L-shaped block (8). The third spring (27) is connected to the connecting sleeve (9). A square plate (15) is also installed on the inner wall of the square cabinet (1). The square plate (15) is equipped with a first spring sheet (18). When the steel brush (10) slides against the first spring sheet (18), the first spring sheet (18) squeezes the steel brush (10), and the connecting sleeve (9) compresses the third spring (27). The square cabinet (1) is also slidably connected with a sliding column (19). The outer surface of the sliding column (19) is connected with a second spring (20). The second spring (20) is connected to the square cabinet (1). The second spring (20) is used to drive the air intake plate (11) to reset. The sliding column (19) is connected to the air intake plate (11). The square plate (15) is provided with a first inclined surface (16). The steel brush (10) is used to abut against the first inclined surface (16).

2. The portable low-voltage distribution cabinet according to claim 1, characterized in that: The inner wall of the connecting sleeve (9) is equipped with a first spring (14), which is connected to the steel brush (10). The first spring (14) is used to drive the steel brush (10) to reset.

3. The portable low-voltage distribution cabinet according to claim 1 or 2, characterized in that: The cabinet (1) is also equipped with a short shaft (22), on which a ring (23) is fitted. A striking plate (21) is installed at one end of the ring (23), and the striking plate (21) is used to strike the air intake plate (11).

4. The portable low-voltage distribution cabinet according to claim 3, characterized in that: A second spring (26) is installed on the connecting plate (5), and an extension plate (24) is installed at the other end of the ring (23). The second spring (26) is used to abut against the extension plate (24).

5. The portable low-voltage distribution cabinet according to claim 1, characterized in that: The inner wall of the cabinet (1) is also equipped with an arc-shaped spring piece (25), which is connected to the protruding plate (24).

6. The portable low-voltage distribution cabinet according to claim 5, characterized in that: The steel brush (10) is provided with a second inclined surface (17), which is used to abut against the first inclined surface (16).

7. The portable low-voltage distribution cabinet according to claim 6, characterized in that: A trapezoidal block (28) is also installed on the square plate (15), and the steel brush (10) is used to abut against the trapezoidal block (28). The second inclined surface (17) is adapted to the trapezoidal block (28).

Images