Low-voltage ring main unit for low-voltage chamber

Abstract

The application relates to the technical field of ring network cabinets, in particular to a low-voltage chamber ring network cabinet, which comprises a ring network cabinet body, an air inlet shell is arranged in the ring network cabinet body, an air inlet fan is slidably arranged in the air inlet shell, the top end of the air inlet fan is fixedly connected with the inner wall of the ring network cabinet body, the bottom end of the air inlet shell extends to the lower part of the ring network cabinet body, a first filter screen is fixedly connected in the air inlet shell, an air outlet hole is arranged at the top end of the ring network cabinet body, and a second filter screen is fixedly connected in the air outlet hole; the first filter screen does not need to be manually cleaned by the staff, dust and impurities can be collected in a collecting unit, the cleaned dust and impurities are prevented from adhering to the first filter screen again, the dust is guided to the collecting unit and locked through the sealing function of the collecting unit and a sealing plate in a non-cleaning state, and the path of dust diffusion is cut off.

Description

Technical Field

[0001] This invention relates to the field of ring main unit technology, and in particular to a ring main unit for low-voltage rooms. Background Technology

[0002] Ring main units (RMMs) in low-voltage distribution rooms are crucial power distribution equipment, responsible for the distribution, control, and protection of electrical energy. Because they integrate high-current-carrying components such as circuit breakers, disconnectors, and busbars, they generate significant Joule heat during operation, causing a rapid increase in internal temperature. Excessive heat accelerates the aging of insulation materials, reduces the reliability of conductor connections, and can even lead to malfunctions or short-circuit faults, seriously threatening the safe and stable operation of the power grid.

[0003] To address the heat dissipation issue, existing low-pressure room ring main units typically have air inlets at the bottom or sides of the cabinet and air outlets at the top. They utilize natural convection or forced air cooling by adding cooling fans. To ensure heat dissipation and prevent external impurities from entering, filters are usually installed at the air inlets and outlets.

[0004] However, it's worth considering that this conventional heat dissipation design has significant drawbacks. While the filter screen blocks dust, it itself gradually becomes clogged with dust, leading to decreased ventilation efficiency and reduced heat dissipation capacity. Maintenance personnel must periodically (e.g., quarterly or monthly) shut off the power and open the cabinet door to manually disassemble and clean the filter screen. When there are many ring main units in the low-voltage room, this increases the workload, risk of electric shock, and unplanned equipment downtime. Furthermore, during cleaning, the shaken-off dust is easily blown around and can easily re-adhere to the filter screen or enter the cabinet, contaminating electrical components.

[0005] Therefore, in order to solve the above problems, a more suitable facility that meets the needs of users is needed. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide a ring main unit for low-voltage rooms to solve the problems of increased workload, risk of electric shock, and unplanned downtime of equipment caused by manually disassembling and cleaning the filter.

[0007] To achieve the above objectives, the present invention provides a ring main unit for low-pressure rooms, comprising a ring main unit body, an air inlet shell provided inside the ring main unit body, an air inlet fan slidably disposed inside the air inlet shell, and the top end of the air inlet fan being fixedly connected to the inner wall of the ring main unit body, the bottom end of the air inlet shell extending to the bottom of the ring main unit body, and a first filter screen being fixedly connected inside the air inlet shell, and an air outlet opening at the top end of the ring main unit body, with a second filter screen fixedly connected inside the air outlet.

[0008] A support frame is provided below the air intake shell, a collection unit is provided at the bottom of the support frame, several sealing plates are provided inside the support frame, and control shells are fixedly connected to both sides of the support frame respectively. The top of the control shell is fixedly connected to the bottom of the ring main unit.

[0009] The control housing is equipped with a cleaning and adjustment structure for adjusting the angle of several sealing plates. Two side plates that cooperate with the sealing plates are fixedly connected inside the support frame. The ring main unit is equipped with a vertical positioning mechanism that cooperates with the air intake housing.

[0010] Optionally, the cleaning and adjustment structure includes a movable seat disposed inside the control housing, with both ends of the movable seat penetrating the control housing. Both ends of the control housing are fixedly connected to hydraulic telescopic rods, and the telescopic ends of the hydraulic telescopic rods are fixedly connected to the movable seat. Both ends of the sealing plate are fixedly connected to a first rotating shaft, and the first rotating shaft penetrates the support frame. A slider that cooperates with the movable seat is provided on the first rotating shaft.

[0011] Optionally, the slider includes a first rotating plate fixedly installed on the side of the first rotating shaft away from the sealing plate, and the first rotating plate is located inside the control housing. A plurality of rectangular holes are opened on the movable seat, and a first movable column is slidably arranged in the rectangular holes. The first rotating plate and the corresponding first movable column are fixedly connected.

[0012] Optionally, the vertical positioning mechanism includes several first fixed columns fixedly installed on the bottom of the inner wall of the ring main unit. A support ring is fixedly sleeved on the outside of the first fixed column. A fixed plate located above the support ring is slidably sleeved on the outside of the first fixed column. The fixed plate is fixedly connected to the outer wall of the air intake shell. An elastic element adapted to the first fixed column is installed on the fixed plate. Iron plates are fixedly connected to both sides of the air intake shell. A magnet is provided above the iron plate and is fixedly connected to the air intake fan. An actuator that cooperates with the iron plate is provided on the ring main unit body.

[0013] Optionally, the elastic element includes a fixing frame fixedly mounted on a fixing plate, a groove is provided on the top of the first fixing column, a second movable column is slidably disposed in the groove, the top of the second movable column is fixedly connected to the fixing frame, and the bottom of the second movable column is connected to the bottom of the inner wall of the groove by a first tension spring.

[0014] Optionally, the actuator includes a pressing plate disposed above the iron plate, a second fixing post passing through the pressing plate, the bottom end of the second fixing post being fixedly connected to the inner wall of the ring main unit body, a second tension spring being sleeved on the outside of the second fixing post, the two ends of the second tension spring being fixedly connected to the bottom of the pressing plate and the bottom of the inner wall of the ring main unit body respectively, a first support plate being fixedly connected to the bottom of the pressing plate, the bottom end of the first support plate extending into the control housing, the bottom end of the first support plate contacting the top of the movable seat, and the top of the movable seat having several sliding grooves that cooperate with the first support plate.

[0015] Optionally, the support frame is provided with two baffles on the top, and a second rotating shaft is fixedly connected to each side of the baffles. The control housing is provided with a rotating mechanism that cooperates with the second rotating shaft.

[0016] Optionally, the rotating mechanism includes a second rotating plate fixedly mounted on a second rotating shaft, and the second rotating plate is located inside the control housing. A third movable column is fixedly connected to the second rotating plate. A rectangular ring is slidably sleeved on the outside of the third movable column. Adjustment grooves are respectively opened at both ends of the movable seat. A second support plate is fixedly connected to the bottom of the rectangular ring. An inclined surface that matches the bottom end of the second support plate is opened on the inner wall of the adjustment groove. A downward pressure guide that matches the rectangular ring is provided inside the control housing.

[0017] Optionally, the downward guide includes counterweights fixedly installed on both sides of the rectangular ring, with guide posts penetrating through the counterweights, and the top of the guide posts being fixedly connected to the inner wall of the control housing.

[0018] Optionally, the collection unit includes a collection box disposed below the support frame. The collection box is a hollow structure with an open top. Several mounting plates are fixedly connected to both the collection box and the support frame. Bolts pass through two adjacent mounting plates, and nuts are sleeved on the outside of the bolts.

[0019] The beneficial effects of this invention are as follows: By adjusting the structure to drive the sealing plates to rotate, the sealing plates are no longer in contact with each other, thus allowing the support frame to be in an open state. As the sealing plates continue to rotate, the top of the sealing plates slides against the bottom of the first filter screen, cleaning the bottom of the first filter screen. Simultaneously, the sealing plates push the first filter screen and the air inlet housing upwards. When the top of the sealing plates lifts the air inlet housing and the first filter screen to their highest position, the vertical positioning mechanism positions the air inlet housing. As the sealing plates continue to rotate, they no longer contact the first filter screen. When the sealing plates rotate to a preset angle, the vertical positioning mechanism releases the positioning of the air inlet housing, and the air inlet housing and the first filter screen move downwards. When the air inlet housing moves to its initial height, the air inlet housing... As the first filter screen stops moving downwards, the loose dust and impurities cleaned from it fall through the support frame into the collection unit due to inertia. Similarly, the cleaning and adjustment structure drives the sealing plate to rotate in the opposite direction. As the sealing plate continues to rotate, its top lifts the air intake housing back to its initial height. Simultaneously, the top of the sealing plate slides relative to the bottom of the first filter screen, cleaning the bottom of the screen. After the air intake housing reaches its highest position again, the vertical positioning mechanism repositions it. As the sealing plate continues to rotate, it rotates to a preset position, and the vertical positioning mechanism releases its position, allowing the air intake housing and the first filter screen to move downwards to their initial height. By repeatedly rotating the sealing plate forward and backward, dust and impurities on the first filter screen fall into the collection unit. When cleaning the first filter screen is not required, the sealing plate is rotated to its initial position via the cleaning and adjustment structure. Several sealing plates contact each other, and the two side plates contact the two sealing plates located at the ends. The sealing plates and the two side plates seal the support frame, preventing dust and impurities from escaping from the collection unit and thus preventing them from re-adhering to the first filter screen during heat dissipation. By repeatedly rotating the sealing plate forward and backward, dust and impurities on the first filter screen are collected in the collection unit, eliminating the need for manual cleaning of the first filter screen and preventing dust and impurities from being collected in the collection unit. The dust and impurities removed from the filter re-adhere to the first filter screen. Through the airtight function of the collection unit and sealing plate in the non-cleaning state, the dust is guided to the collection unit and locked, cutting off the dust's diffusion path. Regular or on-demand automatic cleaning ensures that the first filter screen maintains low air resistance, thus ensuring unobstructed heat dissipation and keeping the internal temperature of the ring main unit within the allowable range. This fundamentally prevents equipment failures caused by overheating. The cleaning process, employing a scraping method where the sealing plate slides against the bottom of the first filter screen and using inertial force to shake off dust, is a controllable, uniform, and repeatable physical cleaning process. It is more gentle on the first filter screen, resulting in better cleaning. The stable temperature environment and clean internal space extend the service life of electrical components and the filter screen itself.Frequent on-site dispatch of technicians for cleaning is unnecessary, avoiding production interruptions caused by maintenance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal bottom structure of the ring main unit according to an embodiment of the present invention;

[0023] Figure 3 This is a structural diagram showing the placement of the air intake shell and support frame according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure after the support frame and control shell are assembled according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the bottom structure of the air intake shell according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the disassembled elastic element according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the control shell according to an embodiment of the present invention;

[0028] Figure 8 For the present invention Figure 7 Enlarged structural diagram of region A in the middle;

[0029] Figure 9 This is a schematic diagram of the structure of the collection unit in an embodiment of the present invention.

[0030] The diagram is marked as follows:

[0031] 1. Ring main unit body; 2. Air inlet shell; 3. Air inlet fan; 4. First filter screen; 5. Support frame; 6. Sealing plate; 7. Control shell; 8. Movable seat; 9. Hydraulic telescopic rod; 10. Side plate; 11. First rotating shaft; 12. First rotating plate; 13. Rectangular hole; 14. First movable column; 15. First fixed column; 16. Support ring; 17. Fixed plate; 18. Iron plate; 19. Magnet block; 20. Fixing frame; 21. Groove; 22. Second movable column ; 23. First tension spring; 24. Pressing plate; 25. Second fixed column; 26. Second tension spring; 27. First support plate; 28. Slide groove; 29. ​​Second rotating shaft; 30. Second rotating plate; 31. Third movable column; 32. Rectangular ring; 33. Second support plate; 34. Adjustment groove; 35. Guide column; 36. Counterweight; 37. Baffle plate; 38. Collection box; 39. Mounting plate; 40. Bolt; 41. Nut; 42. Second filter screen. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0033] Example 1, by Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 9 The present invention includes a ring main unit 1, an air inlet shell 2 is provided inside the ring main unit 1, an air inlet fan 3 is slidably provided inside the air inlet shell 2, and the top end of the air inlet fan 3 is fixedly connected to the inner wall of the ring main unit 1. The bottom end of the air inlet shell 2 extends to the bottom of the ring main unit 1, and a first filter screen 4 is fixedly connected inside the air inlet shell 2. An air outlet is opened at the top end of the ring main unit 1, and a second filter screen 42 is fixedly connected inside the air outlet.

[0034] A support frame 5 is provided below the air intake shell 2. A collection unit is provided at the bottom of the support frame 5. Several sealing plates 6 are provided inside the support frame 5. Control shells 7 are fixedly connected to both sides of the support frame 5. The top of the control shell 7 is fixedly connected to the bottom of the ring main unit 1.

[0035] The control housing 7 is equipped with a cleaning and adjustment structure for adjusting the angles of several sealing plates 6. Two side plates 10, which cooperate with the sealing plates 6, are fixedly connected inside the support frame 5. The ring main unit 1 is equipped with a vertical positioning mechanism that cooperates with the air intake housing 2. When it is necessary to start heat dissipation inside the ring main unit 1, the air intake fan 3 is turned on. The air intake fan 3 draws air from outside the ring main unit 1 into the ring main unit 1 through the air intake housing 2. Dust and impurities in the air are filtered by the first filter screen 4. The hot air inside the ring main unit 1 is discharged through the air outlet located at the top of the ring main unit 1. The design of the second filter screen 42 prevents external dust and impurities from entering the ring main unit 1 through the air outlet. After heat dissipation, the dust at the bottom of the first filter screen 4 needs to be cleaned. During operation, the sealing plate 6 is rotated by adjusting the structure to prevent it from contacting each other, thus opening the support frame 5. As the sealing plate 6 continues to rotate, its top slides against the bottom of the first filter screen 4, cleaning the bottom of the first filter screen 4. Simultaneously, the sealing plate 6 pushes the first filter screen 4 and the air inlet shell 2 upwards. When the top of the sealing plate 6 lifts the air inlet shell 2 and the first filter screen 4 to their highest position, the vertical positioning mechanism positions the air inlet shell 2. As the sealing plate 6 continues to rotate, it no longer contacts the first filter screen 4. When the sealing plate 6 rotates to a preset angle, the vertical positioning mechanism releases the positioning of the air inlet shell 2, and the air inlet shell 2 and the first filter screen... 4. Downward Movement: When the intake housing 2 moves down to its initial height, the intake housing 2 and the first filter screen 4 stop moving downward. The loose dust and impurities cleaned on the first filter screen 4 fall into the collection unit due to inertia via the support frame 5. Similarly, the cleaning and adjustment structure drives the sealing plate 6 to rotate in the opposite direction. As the sealing plate 6 continues to rotate, the top of the sealing plate 6 lifts the intake housing 2 up to its initial height again. While the top of the sealing plate 6 lifts the first filter screen 4 up, the top of the sealing plate 6 slides relative to the bottom of the first filter screen 4 to clean the bottom of the first filter screen 4. After the intake housing 2 moves up to its highest position again, the vertical positioning mechanism repositions the intake housing 2. As the sealing plate 6 continues to rotate, the sealing plate 6 rotates to the pre-positioned position. Once the position is set, the vertical positioning mechanism releases its positioning of the air intake shell 2, and the air intake shell 2 and the first filter screen 4 move down to the initial height. By driving the sealing plate 6 to rotate forward and backward, dust and impurities on the first filter screen 4 can fall into the collection unit. When cleaning the first filter screen 4 is not required, the sealing plate 6 is rotated to the initial position by the cleaning and adjustment structure. Several sealing plates 6 are in contact with each other, and the two side plates 10 are in contact with the two sealing plates 6 located at both ends, respectively. The several sealing plates 6 and the two side plates 10 seal the support frame 5, preventing dust and impurities in the collection unit from floating out of the collection unit, and thus preventing dust and impurities from re-adhering to the first filter screen 4 during heat dissipation. By repeatedly driving the sealing plate 6 to rotate forward and backward,This system collects dust and impurities from the first filter screen 4 within the collection unit, eliminating the need for manual cleaning and preventing re-adhesion of cleaned dust and impurities. The sealing unit and sealing plate 6, when not in use, guide dust to the collection unit and lock it in place, cutting off its diffusion path. Regular or on-demand automatic cleaning ensures the first filter screen 4 maintains low air resistance, allowing for unobstructed airflow and keeping the internal temperature of the ring main unit 1 within acceptable limits. This prevents equipment malfunctions caused by overheating. The scraping method, where the sealing plate 6 slides against the bottom of the first filter screen 4 and uses inertial force to shake off dust, is a controllable, uniform, and repeatable physical cleaning process. This is gentler on the first filter screen 4, resulting in better cleaning. The stable temperature environment and clean internal space extend the lifespan of electrical components and the filter itself, eliminating the need for frequent on-site cleaning by technicians and preventing production interruptions due to maintenance.

[0036] Example 2, based on Example 1, is... Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8The cleaning and adjustment structure includes a movable seat 8 disposed within a control housing 7. Both ends of the movable seat 8 penetrate the control housing 7, and both ends of the control housing 7 are fixedly connected to hydraulic telescopic rods 9. The telescopic ends of the hydraulic telescopic rods 9 are fixedly connected to the movable seat 8. Both ends of the sealing plate 6 are fixedly connected to a first rotating shaft 11, which penetrates the support frame 5. The first rotating shaft 11 is equipped with a slider that cooperates with the movable seat 8. The slider includes a first rotating plate 12 fixedly installed on the side of the first rotating shaft 11 away from the sealing plate 6, and the first rotating plate 12 is located within the control housing 7. The movable seat 8... The system has several rectangular holes 13, and first movable columns 14 are slidably installed within the rectangular holes 13. A first rotating plate 12 and a corresponding first movable column 14 are fixedly connected. The vertical positioning mechanism includes several first fixed columns 15 fixedly installed on the bottom of the inner wall of the ring main unit 1. A support ring 16 is fixedly sleeved on the outside of each first fixed column 15. A fixed plate 17 located above the support ring 16 is slidably sleeved on the outside of each first fixed column 15. The fixed plate 17 is fixedly connected to the outer wall of the air intake shell 2. An elastic element adapted to the first fixed column 15 is installed on the fixed plate 17. The air intake shell 2 is fixed on both sides respectively. A metal plate 18 is connected to the ring main unit. A magnet 19 is located above the metal plate 18 and is fixedly connected to the intake fan 3. The ring main unit body 1 is equipped with a lever that cooperates with the metal plate 18. The elastic element includes a fixing bracket 20 fixedly installed on a fixing plate 17. A groove 21 is opened at the top of the first fixing column 15. A second movable column 22 is slidably arranged in the groove 21. The top of the second movable column 22 is fixedly connected to the fixing bracket 20. The bottom end of the second movable column 22 is connected to the bottom of the inner wall of the groove 21 by a first tension spring 23. The lever includes a pressing plate 24 located above the metal plate 18. A second fixing post 25 passes through the pressing plate 24. The bottom end of the second fixing post 25 is fixedly connected to the inner wall of the ring main unit 1. A second tension spring 26 is sleeved on the outside of the second fixing post 25. The two ends of the second tension spring 26 are fixedly connected to the bottom of the pressing plate 24 and the bottom of the inner wall of the ring main unit 1, respectively. A first support plate 27 is fixedly connected to the bottom of the pressing plate 24. The bottom end of the first support plate 27 extends into the control housing 7. The bottom end of the first support plate 27 contacts the top of the movable seat 8. The top of the movable seat 8 is provided with several sliding grooves 28 that cooperate with the first support plate 27.

[0037] The movable seat 8 is driven to translate by the hydraulic telescopic rod 9. The movable seat 8 drives the first movable column 14 to slide within the rectangular hole 13. The first movable column 14 then drives the first rotating shaft 11 and the sealing plate 6 to rotate via the first rotating plate 12. When the sealing plate 6 rotates, the top of the sealing plate 6 pushes the first filter screen 4 and the air inlet shell 2 to move upward. The air inlet shell 2 drives the fixed plate 17 and the fixed bracket 20 to move upward. The second movable column 22 slides relative to the groove 21. The first tension spring 23 is in a stretched state, and the top of the movable seat 8 is relative to the first support. The bottom end of the support plate 27 slides, and the second tension spring 26 is in a stretched state. The second tension spring 26 applies a downward pulling force to the pressing plate 24 so that the bottom end of the first support plate 27 is always in close contact with the movable seat 8. As the air intake shell 2 continues to move upward, the air intake shell 2 slides relative to the air intake fan 3. The air intake shell 2 drives the iron plate 18 to move toward the magnet block 19. When the air intake shell 2 moves to the highest position, the top of the iron plate 18 and the bottom of the magnet block 19 contact each other. The magnet block 19 applies a magnetic force to the iron plate 18 so that the air intake shell 2... With the intake fan 3 and the ring main unit 1 fixed, as the movable seat 8 continues to move, when the sealing plate 6 rotates to a preset angle, the slide groove 28 on the movable seat 8 slides to below the first support plate 27. The second tension spring 26 drives the pressing plate 24 to move down, and the bottom of the pressing plate 24 presses the top of the iron plate 18. Through the tension applied by the second tension spring 26 and the first tension spring 23, the iron plate 18 is no longer magnetically attracted to the magnet block 19, and the intake shell 2 moves down relative to the intake fan 3. The intake shell 2 drives the fixed plate 1. 7 slides relative to the first fixed column 15, and finally the bottom of the fixed plate 17 and the top of the support ring 16 come into contact. The air intake shell 2 descends to the initial position, and the dust and impurities on the first filter screen 4 fall down due to inertia. The bottom end of the first support plate 27 slides into the slide groove 28. When the movable seat 8 moves in the opposite direction, the inner wall of the slide groove 28 drags the first support plate 27 and the pressing plate 24 upward. Finally, the bottom end of the first support plate 27 comes into contact with the top of the movable seat 8 again, and the pressing plate 24 and the first support plate 27 return to the initial height.

[0038] Example 3, based on Example 2, by Figure 4 , Figure 7 and Figure 8The support frame 5 has two baffles 37 on its upper part. The baffles 37 are fixedly connected to the two sides of the baffles 37. The control housing 7 has a rotating mechanism that cooperates with the second rotating shafts 29. The rotating mechanism includes a second rotating plate 30 fixedly installed on the second rotating shafts 29 and located inside the control housing 7. A third movable column 31 is fixedly connected to the second rotating plate 30. A rectangular ring 32 is slidably sleeved on the outside of the third movable column 31. Adjustment grooves 34 are opened at both ends of the movable seat 8. A second support plate 33 is fixedly connected to the bottom of the rectangular ring 32. An inclined surface that cooperates with the bottom end of the second support plate 33 is opened on the inner wall of the adjustment groove 34. The control housing 7 has a pressing guide that is adapted to the rectangular ring 32. The pressing guide includes counterweights 36 fixedly installed on both sides of the rectangular ring 32. A guide column 35 passes through the counterweights 36 and the top of the guide column 35 is fixedly connected to the inner wall of the control housing 7.

[0039] The baffle 37 is initially in a horizontal state. External air enters the intake housing 2 through the baffle 37 and the first filter screen 4. When it is necessary to clean the dust and impurities on the first filter screen 4, the hydraulic telescopic rod 9 drives the movable seat 8 to move. When the sealing plate 6 rotates, the movable seat 8 moves relative to the second support plate 33. The inclined surface on the adjusting groove 34 drags the second support plate 33 and the rectangular ring 32 upward. The rectangular ring 32 drives the counterweight 36 to slide relative to the guide post 35 and the control housing 7. Through the design of the counterweight 36 and the guide post 35, the rectangular ring 32 moves smoothly in the vertical direction. The counterweight 36 applies a downward force to the rectangular ring 32 so that the bottom end of the second support plate 33 is always in close contact with the inner wall of the adjusting groove 34. As the movable seat 8 continues to move, the third movable post 31 slides in the rectangular ring 32. The third movable post 31 is driven by the second rotating plate 30. As the second rotating shaft 29 and the baffle plate 37 rotate, when the top of the sealing plate 6 is not in contact with the bottom of the first filter screen 4, the bottom of the second support plate 33 slides from the inclined surface on the adjustment groove 34 to the horizontal plane, and the baffle plate 37 is perpendicular to the horizontal plane at this time. The bottom of the baffle plate 37 is in contact with the top of the support frame 5, and the top of the baffle plate 37 is in contact with the bottom of the ring main unit 1. As the movable seat 8 continues to move, the top of the sealing plate 6 begins to contact the bottom of the first filter screen 4. During the process of the sealing plate 6 cleaning the first filter screen 4, the height of the second support plate 33 remains unchanged so that the baffle plate 37 remains perpendicular to the horizontal plane. The space between the ring main unit 1 and the support frame 5 is turned into a sealed space by the two control shells 7 and the two baffle plates 37 to prevent dust from drifting out from between the ring main unit 1 and the support frame 5 during the cleaning process.

[0040] Example 4, based on Example 1, is... Figure 1 , Figure 2 and Figure 9As shown, the collection unit includes a collection box 38 located below the support frame 5. The collection box 38 is a cavity structure with an open top. Several mounting plates 39 are fixedly connected to both the collection box 38 and the support frame 5. Bolts 40 pass through two adjacent mounting plates 39, and nuts 41 are sleeved on the outside of the bolts 40.

[0041] When the angle of the sealing plate 6 changes so that the sealing plates 6 no longer contact each other, the support frame 5 is in the open state, and dust and impurities can fall into the collection box 38 through the support frame 5. When the sealing plates 6 contact each other, the support frame 5 is in the closed state, which can prevent dust and impurities in the collection box 38 from floating out. When it is necessary to collect and clean the dust and impurities in the collection box 38, the operator drives the nut 41 to rotate so that the nut 41 is disengaged from the bolt 40, and the fixing relationship between the two adjacent mounting plates 39 is released, thus releasing the fixing relationship between the collection box 38 and the support frame 5. The operator can then remove the collection box 38 from under the support frame 5.

[0042] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A ring main unit for low-voltage rooms, comprising a ring main unit body (1), characterized in that, The ring main body (1) is provided with an air inlet shell (2), and an air inlet fan (3) is slidably provided in the air inlet shell (2). The top of the air inlet fan (3) is fixedly connected to the inner wall of the ring main body (1). The bottom of the air inlet shell (2) extends to the bottom of the ring main body (1). A first filter screen (4) is fixedly connected in the air inlet shell (2). An air outlet is opened at the top of the ring main body (1). A second filter screen (42) is fixedly connected in the air outlet. The air intake shell (2) is provided with a support frame (5) below it. The bottom of the support frame (5) is provided with a collection unit. Several sealing plates (6) are provided inside the support frame (5). Control shells (7) are fixedly connected to both sides of the support frame (5). The top of the control shell (7) is fixedly connected to the bottom of the ring network cabinet body (1). The control housing (7) is provided with a cleaning and adjustment structure for adjusting the angle of several sealing plates (6). Two side plates (10) that cooperate with the sealing plates (6) are fixedly connected inside the support frame (5). The ring network cabinet body (1) is provided with a vertical positioning mechanism that cooperates with the air inlet shell (2). The cleaning and adjustment structure includes a movable seat (8) set inside the control housing (7), with both ends of the movable seat (8) penetrating the control housing (7) respectively. Both ends of the control housing (7) are fixedly connected to hydraulic telescopic rods (9), and the telescopic ends of the hydraulic telescopic rods (9) are fixedly connected to the movable seat (8). Both ends of the sealing plate (6) are fixedly connected to a first rotating shaft (11), and the first rotating shaft (11) penetrates the support frame (5). The first rotating shaft (11) is provided with a slider that cooperates with the movable seat (8). The vertical positioning mechanism includes several first fixed columns (15) fixedly installed on the bottom of the inner wall of the ring main body (1). The first fixed column (15) is fixedly fitted with a support ring (16). The first fixed column (15) is slidably fitted with a fixed plate (17) located above the support ring (16). The fixed plate (17) is fixedly connected to the outer wall of the air inlet shell (2). The fixed plate (17) is fitted with an elastic element that is compatible with the first fixed column (15). Iron plates (18) are fixedly connected to both sides of the air inlet shell (2). A magnet (19) is provided above the iron plate (18). The magnet (19) is fixedly connected to the air inlet fan (3). The ring main body (1) is provided with a toggle that cooperates with the iron plate (18).

2. The ring main unit for low-voltage rooms according to claim 1, characterized in that, The slider includes a first rotating plate (12) fixedly installed on the side of the first rotating shaft (11) away from the sealing plate (6), and the first rotating plate (12) is located inside the control housing (7). A plurality of rectangular holes (13) are provided on the movable seat (8), and a first movable column (14) is slidably provided in the rectangular holes (13). The first rotating plate (12) and the corresponding first movable column (14) are fixedly connected.

3. The ring main unit for low-voltage rooms according to claim 1, characterized in that, The elastic element includes a fixed frame (20) fixedly installed on a fixed plate (17), a groove (21) is provided on the top of the first fixed column (15), a second movable column (22) is slidably provided in the groove (21), the top of the second movable column (22) is fixedly connected to the fixed frame (20), and the bottom of the second movable column (22) is connected to the bottom of the inner wall of the groove (21) by a first tension spring (23).

4. The ring main unit for low-voltage rooms according to claim 1, characterized in that, The actuator includes a pressing plate (24) disposed above the iron plate (18). A second fixing post (25) passes through the pressing plate (24). The bottom end of the second fixing post (25) is fixedly connected to the inner wall of the ring main body (1). A second tension spring (26) is sleeved on the outside of the second fixing post (25). The two ends of the second tension spring (26) are fixedly connected to the bottom of the pressing plate (24) and the bottom of the inner wall of the ring main body (1), respectively. A first support plate (27) is fixedly connected to the bottom of the pressing plate (24). The bottom end of the first support plate (27) extends into the control housing (7). The bottom end of the first support plate (27) contacts the top of the movable seat (8). The top of the movable seat (8) is provided with several sliding grooves (28) that cooperate with the first support plate (27).

5. The ring main unit for low-voltage rooms according to claim 1, characterized in that, Two baffles (37) are provided above the support frame (5). The baffles (37) are respectively fixedly connected to the second rotating shaft (29) on both sides. The control housing (7) is provided with a rotating mechanism that cooperates with the second rotating shaft (29).

6. The ring main unit for low-voltage rooms according to claim 5, characterized in that, The rotating mechanism includes a second rotating plate (30) fixedly installed on the second rotating shaft (29), and the second rotating plate (30) is located inside the control housing (7). A third movable column (31) is fixedly connected to the second rotating plate (30). A rectangular ring (32) is slidably sleeved on the outside of the third movable column (31). Adjustment grooves (34) are respectively opened at both ends of the movable seat (8). A second support plate (33) is fixedly connected to the bottom of the rectangular ring (32). An inclined surface that matches the bottom end of the second support plate (33) is opened on the inner wall of the adjustment groove (34). A downward pressure guide that matches the rectangular ring (32) is provided inside the control housing (7).

7. The ring main unit for low-voltage rooms according to claim 6, characterized in that, The downward guide includes counterweights (36) fixedly installed on both sides of the rectangular ring (32), with guide posts (35) penetrating through the counterweights (36), and the top of the guide posts (35) being fixedly connected to the inner wall of the control housing (7).

8. The ring main unit for low-voltage rooms according to claim 1, characterized in that, The collection unit includes a collection box (38) located below the support frame (5). The collection box (38) is a cavity structure with an open top. Several mounting plates (39) are fixedly connected to both the collection box (38) and the support frame (5). Bolts (40) pass through two adjacent mounting plates (39), and nuts (41) are fitted on the outside of the bolts (40).

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