A lift-adjustable aeration device

Abstract

This utility model relates to the field of aeration equipment and discloses a height-adjustable aeration device, including a treatment tank. A top plate is fixedly connected to the inner top wall of the treatment tank. First fixing blocks are fixedly connected to the front and rear sides of the top of the top plate. A bidirectional motor is installed on the top of each of the two first fixing blocks. A first outer shell is penetrated through the front and rear sides of the top of the top plate. This utility model, through its bidirectional motor, protective shell, and connecting rod, solves the problem of microorganisms being unable to effectively decompose pollutants due to lack of oxygen, thus damaging the activated sludge structure and affecting the continuity of wastewater treatment. The linear movement of the worm gear drives the meshing turbine to rotate. The turbine is mounted inside the first outer shell through bearings on the upper and lower sides, ensuring rotational stability, thereby effectively increasing dissolved oxygen levels, accelerating the decomposition of pollutants such as ammonia nitrogen by microorganisms, extending the equipment replacement cycle, and reducing maintenance frequency and costs.

Description

Technical Field

[0001] This utility model relates to the field of aeration equipment, and in particular to an adjustable aeration device. Background Technology

[0002] Aeration devices are used to provide oxygen to microorganisms in water bodies, promoting the decomposition and oxidation of organic matter in wastewater. When gas enters the water body through these holes or slits, it generates a large number of bubbles, thereby increasing the gas-liquid contact area and promoting the dissolution and transfer of gas into the water body.

[0003] When the aeration heads are submerged deeply, the air bubbles remain in the water for a longer time, resulting in higher oxygen transfer efficiency. Conversely, when submerged shallowly, the aeration volume is smaller. Since the aeration heads are fixed in position, the aeration volume cannot be dynamically adjusted according to changes in water quality. This leads to microorganisms being unable to effectively decompose pollutants due to lack of oxygen, damaging the activated sludge structure, causing sludge bulking, and affecting the continuity of wastewater treatment. In traditional fixed-connection equipment, each bolt must be disassembled individually or cut with tools. Especially when components such as aeration heads and pipes are blocked or damaged, maintenance personnel may need to spend several hours or even longer to disassemble, causing the aeration system to shut down, affecting the continuity of wastewater treatment, resulting in uneven aeration areas, insufficient dissolved oxygen in some areas, and reduced aeration efficiency. Utility Model Content

[0004] The main purpose of this invention is to provide an adjustable aeration device that can effectively solve the problems of microorganisms being unable to decompose pollutants due to lack of oxygen, damaging the activated sludge structure, causing sludge bulking, affecting the continuity of sewage treatment, causing the aeration system to shut down, affecting the continuity of sewage treatment, uneven aeration area, insufficient dissolved oxygen in some areas, and reduced aeration efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a liftable and adjustable aeration device, comprising a treatment tank, a top plate fixedly connected to the inner top wall of the treatment tank, first fixing blocks fixedly connected to the front and rear sides of the top of the top plate, bidirectional motors provided on the top of the two first fixing blocks, first outer shells penetrating the interior of the front and rear sides of the top of the top plate, protective shells fixedly connected to the other side of the four first outer shells, worm gears rotatably connected inside the four protective shells, rotating shafts fixedly connected to the left and right output ends of the two bidirectional motors, connecting rods fixedly connected to the outer sides of the other ends of the four rotating shafts, and threaded connections of the other ends of the four connecting rods to the outer sides of the left and right ends of the four worm gears, turbines provided inside the four first outer shells, the rear side of each worm gear meshing with the front side of each turbine, bearings provided on the upper and lower side walls of each turbine, and internal threads provided inside each turbine.

[0006] Furthermore, each of the four first housings has a lead screw inside, the outer side of the four lead screws is threadedly connected to four internal threaded parts, and a sleeve is provided on the outer side of the bottom end of each of the four lead screws. An upper cover ring is fixedly connected to the bottom end of each sleeve, and a lower cover ring is provided at the bottom of each upper cover ring.

[0007] Furthermore, the treatment pool is equipped with a main pipe inside, and branch pipes are connected to the outer sides of the main pipe. Support plates are fixedly connected to the bottom of the left and right ends of each branch pipe. Connecting plates are fixedly connected to the front and rear side walls of the two support plates. Second fixing blocks are fixedly connected to the top of the four connecting plates at the four corners of the top plate.

[0008] Furthermore, the rear end of the main pipe is connected to an air inlet pipe, the top end of which is connected to the interior of the rear side wall of the top plate. The top of each branch pipe is connected to a conveying pipe, and the top of each conveying pipe is fixedly connected to an aeration disc.

[0009] Furthermore, each of the lower cover rings has a second fixing plate fixedly connected to its top front and rear sides, and two locking blocks fixedly connected to the top of each second fixing plate. Each of the upper cover rings has a first fixing plate fixedly connected to its bottom front and rear sides. Each of the first fixing plates has a second outer shell that is connected through it. Each of the second outer shells has a support rod slidably connected to its left and right sides.

[0010] Furthermore, each of the support rods has four springs fixedly connected to its rear side wall, and the other end of each spring is fixedly connected to an internal slot in the second housing. Each of the second housings has a placement slot inside its bottom, and the interior of each placement slot corresponds to the locking block. The slot inside each locking block corresponds to the bottom of each support rod.

[0011] Furthermore, a first support frame is fixedly connected to the bottom of each of the lower cover rings, and a first anti-slip block is fixedly connected to the bottom of each of the first support frames.

[0012] Furthermore, a second support frame is fixedly connected to the bottom of each of the two support plates, and a second anti-slip block is fixedly connected to the bottom of each second support frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model, through its bidirectional motor, protective shell, connecting rod, turbine, bearing, lead screw, and sleeve, solves the problem of microorganisms being unable to effectively decompose pollutants due to lack of oxygen, damaging the activated sludge structure, causing sludge bulking, and affecting the continuity of wastewater treatment. The linear movement of the worm gear drives the meshing turbine to rotate. The turbine is mounted inside the first outer shell via bearings on both the upper and lower sides, ensuring rotational stability. The internal thread of the turbine engages with the lead screw thread. When the turbine rotates, the lead screw moves axially up and down within the first outer shell, thereby driving the sleeve connected to the bottom of the lead screw to move up and down. This effectively increases dissolved oxygen levels, accelerates the decomposition of pollutants such as ammonia nitrogen by microorganisms, extends equipment replacement cycles, and reduces maintenance frequency and costs.

[0015] 2. By incorporating a second outer shell, spring, second fixing plate, first support frame, second support frame, and second anti-slip block, the system effectively addresses issues that cause aeration system shutdowns, disrupt wastewater treatment continuity, result in uneven aeration zones, insufficient dissolved oxygen in certain areas, and reduced aeration efficiency. When the locking block is fully inserted into the placement slot, the spring's elasticity causes the support rod to reset and insert into the slot inside the locking block, thus firmly connecting the upper and lower cover rings. This connection method ensures stable engagement of the upper and lower cover rings during the lifting and lowering of the aeration components, allowing the main pipe, branch pipes, and other components to rise and fall synchronously. It prevents loose connections from affecting the operation of the aeration device, effectively improving the efficiency of pipe disassembly and installation, reducing downtime, and ensuring that the aeration device does not tilt or shift during installation and use.

[0016] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an adjustable aeration device proposed in this utility model;

[0018] Figure 2 This is an internal cross-sectional view of an adjustable aeration device proposed in this utility model.

[0019] Figure 3 This is a structural diagram of the first fixed block of an adjustable aeration device proposed in this utility model;

[0020] Figure 4 This is a diagram of the screw structure of an adjustable aeration device proposed in this utility model;

[0021] Figure 5 This is a turbine structure diagram of an adjustable aeration device proposed in this utility model;

[0022] Figure 6This is a cross-sectional view of the turbine interior of an adjustable aeration device proposed in this utility model.

[0023] Figure 7 This is a bottom view of an adjustable aeration device proposed in this utility model.

[0024] Figure 8 This is a structural diagram of the upper cover ring of an adjustable aeration device proposed in this utility model;

[0025] Figure 9 This is a structural diagram of the lower cover ring of an adjustable aeration device proposed in this utility model;

[0026] Figure 10 This is a structural diagram of the first fixed plate of an adjustable aeration device proposed in this utility model.

[0027] Figure 11 This is a cross-sectional view of the internal structure of the second outer shell of an adjustable aeration device proposed in this utility model.

[0028] Figure 12 This is a schematic diagram of the locking block of an adjustable aeration device proposed in this utility model;

[0029] Figure 13 This is a structural diagram of the support plate of an adjustable aeration device proposed in this utility model.

[0030] Legend:

[0031] 1. Treatment tank; 2. Top plate; 3. First fixing block; 4. Bidirectional motor; 5. First outer shell; 6. Protective shell; 7. Rotating shaft; 8. Connecting rod; 9. Worm gear; 10. Turbine; 11. Bearing; 12. Internal threaded part; 13. Lead screw; 14. Sleeve; 15. Upper cover ring; 16. Lower cover ring; 17. Main pipe; 18. Branch pipe; 19. Support plate; 20. Connecting plate; 21. Second fixing block; 22. Air inlet pipe; 23. Conveying pipe; 24. Aeration disc; 25. First fixing plate; 26. Second outer shell; 27. Support rod; 28. Spring; 29. ​​Placement slot; 30. Second fixing plate; 31. Locking block; 32. First support frame; 33. First anti-slip block; 34. Second support frame; 35. Second anti-slip block. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] like Figure 1 - Figure 8The diagram shows a height-adjustable aeration device, comprising a treatment tank 1. A top plate 2 is fixedly connected to the inner top wall of the treatment tank 1. First fixing blocks 3 are fixedly connected to the front and rear sides of the top of the top plate 2. Two bidirectional motors 4 are mounted on the top of each of the first fixing blocks 3. The top plate 2 supports the bottom of the first fixing blocks 3 and fixes the bidirectional motors 4 to the top of the first fixing blocks 3, thus driving the devices on the left and right sides. First outer shells 5 are penetrated through the interior of the front and rear sides of the top plate 2. Protective shells 6 are fixedly connected to the other side of each of the four first outer shells 5. Worms 9 are rotatably connected inside each of the four protective shells 6. The interiors of the first outer shells 5 and protective shells 6 provide external protection and support for the internal worm gears 9 and turbines 10.

[0034] Two bidirectional motors 4 are each fixedly connected to the output ends on both sides of a rotating shaft 7. The other ends of the four rotating shafts 7 are each fixedly connected to the outer side of a connecting rod 8. The other ends of the four connecting rods 8 are threaded to the outer sides of the left and right ends of four worm gears 9. The four first housings 5 ​​are each equipped with a turbine 10. The rear side of each worm gear 9 meshes with the front side of each turbine 10. The upper and lower side walls of each turbine 10 are each equipped with a bearing 11. The interior of each turbine 10 is provided with an internal thread 12. The four first housings 5 ​​are each equipped with a lead screw 13. The outer side of the four lead screws 13 is threaded to the four internal thread 12. The bottom end of each of the four lead screws 13 is provided with a sleeve 14. The bottom end of each sleeve 14 is fixedly connected to an upper cover ring 15. The bottom of each upper cover ring 15 is provided with a lower cover ring 16. By starting the bidirectional motors 4, the output ends on both sides drive the rotating shafts 7 to rotate. The rotating shafts 7 are threaded to the worm gears 9 through the connecting rods 8, converting the rotational motion of the rotating shafts 7 into the linear motion of the worm gears 9 along the axial direction. Since the worm gear 9 is installed inside the protective housing 6 and is rotatable, it moves smoothly in a straight line within the protective housing 6 under the drive of the connecting rod 8. The linear movement of the worm gear 9 drives the meshing turbine 10 to rotate. The turbine 10 is installed inside the first housing 5 via bearings 11 on the upper and lower sides to ensure rotational stability. The internal thread 12 of the turbine 10 is threadedly engaged with the lead screw 13. When the turbine 10 rotates, the lead screw 13 moves axially up and down within the first housing 5, thereby driving the sleeve 14 and the upper cover ring 15 connected to the bottom end of the lead screw 13 to move up and down.

[0035] like Figure 1 - Figure 13As shown, the treatment tank 1 is equipped with a main pipe 17 inside, and branch pipes 18 are connected to the outside of the main pipe 17. Support plates 19 are fixedly connected to the bottom of the left and right ends of each branch pipe 18. Connecting plates 20 are fixedly connected to the front and rear side walls of the two support plates 19. Second fixing blocks 21 are fixedly connected to the top of the four connecting plates 20 through the four corners of the top plate 2. The left and right ends of the multiple branch pipes 18 are fixedly connected together through the branch pipes 18 at the bottom of the left and right ends of the branch pipes 18, and the bottom of the branch pipes 18 is supported. Air inlet pipes 22 are fixedly connected to the connecting plates 20 on the front and rear sides of the branch pipes 18 through the four corners of the top plate 2, so as to prevent the connecting plates 20 from sliding out of the inside of the top plate 2 when the aeration disc 24 is lowered, and to limit the movement.

[0036] When the branch pipe 18 slides up and down, the connecting plate 20 and the air intake pipe 22 provide a stable and balanced sliding effect for the branch pipe 18.

[0037] The rear end of the main pipe 17 is connected to an air inlet pipe 22, the top end of which is connected to the interior of the rear side wall of the top plate 2. The top of each branch pipe 18 is connected to a delivery pipe 23, and the top of each delivery pipe 23 is fixedly connected to an aeration disc 24. Gas is compressed by an external pump, etc., and the compressed gas enters the main pipe 17 from the air inlet pipe 22, then is diverted through the branch pipes 18, and finally reaches the aeration disc 24 via the delivery pipes 23. The aeration disc 24 disperses the gas into tiny bubbles, releasing them into the water of the treatment tank 1, thus achieving the oxygenation and aeration process. Regardless of the height of the aeration disc 24, gas can be stably delivered to the aeration disc 24 through this pipeline system for aeration operations.

[0038] like Figure 1 - Figure 12 As shown, each lower cover ring 16 has a second fixing plate 30 fixedly connected to the front and rear sides of the top, and two locking blocks 31 fixedly connected to the top of each second fixing plate 30. The second fixing plate 30 on the front and rear sides of the top of the lower cover ring 16 is connected to the locking blocks 31, and the locking blocks 31 are connected to the upper cover ring 15 at the top. The branch pipe 18 is fixed inside the lower cover ring 16 and the upper cover ring 15.

[0039] Each top cover ring 15 has a first fixing plate 25 fixedly connected to its bottom front and rear sides. Each first fixing plate 25 has a second outer shell 26 connected through it. Each second outer shell 26 has a support rod 27 slidably connected to its left and right sides. Each support rod 27 has four springs 28 fixedly connected to its rear side wall. The other end of each set of eight springs 28 is fixedly connected to the internal slot of the second outer shell 26. Each second outer shell 26 has a placement slot 29 inside its bottom. The inside of each placement slot 29 corresponds to the slot 31. The slot inside each slot 31 corresponds to the bottom of each support rod 27. When the locking block 31 is inserted into the placement groove 29 at the bottom of the second housing 26, the top of the locking block 31 contacts the bottom of the support rod 27, pushing the support rod 27 to slide inside the second housing 26 and compressing the spring 28 inside the second housing 26. When the locking block 31 is fully inserted into the placement groove 29, the spring 28 applies pressure to drive the support rod 27 to rebound, inserting the bottom of the support rod 27 into the hole groove of the locking block 31, thus connecting the upper cover ring 15 and the lower cover ring 16 together. This ensures stable cooperation between the upper and lower cover rings during the lifting and lowering of the aeration assembly, supporting the branch pipe 18.

[0040] When disassembly is required, the worker presses the support rod 27, causing it to slide inside the second housing 26 to compress the spring 28. At this time, the bottom of the support rod 27 can disengage from the slot of the locking block 31. Then, by pulling the lower cover ring 16 downward, the upper cover ring 15 and the lower cover ring 16 can be disassembled to replace and repair the damaged branch pipe 18.

[0041] like Figure 1 - Figure 13 As shown, a first support frame 32 is fixedly connected to the bottom of each lower cover ring 16, and a first anti-slip block 33 is fixedly connected to the bottom of each first support frame 32. A second support frame 34 is fixedly connected to the bottom of each of the two support plates 19, and a second anti-slip block 35 is fixedly connected to the bottom of each second support frame 34. The combined action of the first support frame 32 and the first anti-slip block 33 at the bottom of the lower cover ring 16, and the second support frame 34 and the second anti-slip block 35 at the bottom of the support plate 19, enhances the stability of the device. The first support frame 32 and the second support frame 34 structurally increase the support points, distributing the weight of the aeration device and the forces generated during operation, thus preventing excessive local stress.

[0042] The first anti-slip block 33 and the second anti-slip block 35 increase the friction with the bottom of the treatment tank 1 or other supporting surfaces, preventing the aeration device from shifting or shaking during lifting or operation, ensuring that the aeration disc 24 aerates stably at the set height, and improving the sewage treatment effect.

[0043] It should be noted that this utility model is a height-adjustable aeration device. First, the bidirectional motor 4 is connected to an external power supply and control terminal to supply power and control the device.

[0044] When the height of the aeration disc 24 needs to be adjusted, the bidirectional motor 4 is started, and its left and right output ends drive the rotating shaft 7 to rotate. The rotating shaft 7 is threadedly connected to the worm 9 through the connecting rod 8, converting the rotational motion of the rotating shaft 7 into the linear motion of the worm 9 along the axial direction. Since the worm 9 is installed inside the protective shell 6 and can rotate, under the drive of the connecting rod 8, the worm 9 moves smoothly in a linear motion within the protective shell 6, and the linear motion of the worm 9 drives the turbine 10, which meshes with it, to rotate. The turbine 10 is installed inside the first outer shell 5 through bearings 11 on the upper and lower sides to ensure the stability of rotation. The internal thread 12 of the turbine 10 is threadedly engaged with the lead screw 13. When the turbine 10 rotates, the lead screw 13 moves up and down along the axial direction within the first outer shell 5, thereby driving the sleeve 14 connected to the bottom end of the lead screw 13 to move up and down.

[0045] The up-and-down movement of the sleeve 14 drives the main pipe 17 and its connected branch pipes 18, support plate 19, connecting plate 20, and second fixed block 21 to rise and fall synchronously via the upper cover ring 15 and lower cover ring 16. Since the conveying pipe 23 and aeration disc 24 connected to the top of the branch pipe 18 are fixedly connected to the branch pipe 18, the aeration disc 24 rises and falls with the entire assembly to adjust its height within the treatment tank 1, meeting aeration requirements under different operating conditions. Gas enters the main pipe 17 from the air inlet pipe 22, then flows through the branch pipe 18, and finally reaches the aeration disc 24 via the conveying pipe 23. The aeration disc 24 disperses the gas into tiny bubbles, releasing them into the water of the treatment tank 1 to achieve oxygenation and aeration. Regardless of the height of the aeration disc 24, gas can be stably delivered to the aeration disc 24 through this pipeline system for aeration operations.

[0046] The upper cover ring 15 and the lower cover ring 16 are connected and fixed by components such as the locking block 31, the second outer shell 26, and the support rod 27. When it is necessary to connect the upper and lower cover rings, the locking block 31 at the top of the lower cover ring 16 is aligned with the placement groove 29 in the second outer shell 26 at the bottom of the upper cover ring 15 and inserted. As the locking block 31 goes deeper, it will squeeze the support rod 27, causing the support rod 27 to slide against the elastic force of the spring 28 to both sides of the second outer shell 26. When the locking block 31 is fully inserted into the placement groove 29, under the elastic force of the spring 28, the support rod 27 returns to its original position and inserts into the hole groove inside the locking block 31, thereby firmly connecting the upper cover ring 15 and the lower cover ring 16. This connection method can ensure stable cooperation between the upper and lower cover rings during the raising and lowering of the aeration assembly, so that components such as the main pipe 17 and the branch pipe 18 can be raised and lowered synchronously, avoiding the operation of the aeration device due to loose connection.

[0047] The first support frame 32 and the first anti-slip block 33 at the bottom of the lower cover ring 16, and the second support frame 34 and the second anti-slip block 35 at the bottom of the support plate 19 work together to enhance the stability of the device. The first support frame 32 and the second support frame 34 structurally increase the support points, distributing the weight of the aeration device and the forces generated during operation, and avoiding excessive local stress. The first anti-slip block 33 and the second anti-slip block 35 increase the friction with the bottom of the treatment tank 1 or other supporting surfaces, preventing the aeration device from shifting or shaking during lifting or operation, ensuring stable aeration of the aeration disc 24 at the set height, and improving the sewage treatment effect.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A height-adjustable aeration device, comprising a treatment tank (1), characterized in that: The top wall of the treatment tank (1) is fixedly connected to a top plate (2). First fixing blocks (3) are fixedly connected to the front and rear sides of the top of the top plate (2). A bidirectional motor (4) is installed on the top of each of the two first fixing blocks (3). A first outer shell (5) is penetrated through the front and rear sides of the top of the top of the top plate (2). A protective shell (6) is fixedly connected to the other side of each of the four first outer shells (5). A worm gear (9) is rotatably connected inside each of the four protective shells (6). The output ends of the two bidirectional motors (4) are... A rotating shaft (7) is fixedly connected to each of the four rotating shafts (7). A connecting rod (8) is fixedly connected to the outer side of the other end of each of the four connecting rods (8). The other ends of each of the four connecting rods (8) are threaded to the outer sides of the left and right ends of the four worms (9). A turbine (10) is provided inside each of the four first housings (5). The rear side of each worm (9) meshes with the front side of each turbine (10). Bearings (11) are provided on the upper and lower side walls of each turbine (10). An internal thread (12) is provided inside each turbine (10).

2. The adjustable aeration device according to claim 1, characterized in that: The four first outer shells (5) are provided with lead screws (13), and the outer sides of the four lead screws (13) are threadedly connected to the four internal threaded parts (12). The bottom ends of the four lead screws (13) are provided with sleeves (14), and the bottom end of each sleeve (14) is fixedly connected with an upper cover ring (15). The bottom of each upper cover ring (15) is provided with a lower cover ring (16).

3. The adjustable aeration device according to claim 1, characterized in that: The treatment pool (1) is equipped with a main pipe (17) inside. The main pipe (17) is connected to branch pipes (18) on the outside. Each branch pipe (18) is fixedly connected to a support plate (19) at the bottom of its left and right ends. The front and rear side walls of the two support plates (19) are fixedly connected to connecting plates (20). The top of the four connecting plates (20) is fixedly connected to the four corners of the top plate (2).

4. The adjustable aeration device according to claim 3, characterized in that: The rear end of the main pipe (17) is connected to an air inlet pipe (22), the top end of the air inlet pipe (22) is connected to the interior of the rear side wall of the top plate (2), the top of each branch pipe (18) is connected to a conveying pipe (23), and the top of each conveying pipe (23) is fixedly connected to an aeration disc (24).

5. The adjustable aeration device according to claim 2, characterized in that: Each of the lower cover rings (16) has a second fixing plate (30) fixedly connected to the front and rear sides of the top, and two locking blocks (31) fixedly connected to the top of each of the second fixing plates (30). Each of the upper cover rings (15) has a first fixing plate (25) fixedly connected to the front and rear sides of the bottom, and a second outer shell (26) is connected through the interior of each of the first fixing plates (25). Each of the second outer shells (26) has a support rod (27) slidably connected to the left and right sides.

6. The adjustable aeration device according to claim 5, characterized in that: Each of the support rods (27) has four springs (28) fixedly connected to its rear side wall. The other end of each spring (28) is fixedly connected to the internal slot of the second housing (26). Each of the second housings (26) has a placement slot (29) inside its bottom. The interior of each placement slot (29) corresponds to the locking block (31). The slot inside each locking block (31) corresponds to the bottom of each support rod (27).

7. The adjustable aeration device according to claim 5, characterized in that: Each of the lower cover rings (16) is fixedly connected to a first support frame (32) at its bottom, and each of the first support frames (32) is fixedly connected to a first anti-slip block (33) at its bottom.

8. The adjustable aeration device according to claim 3, characterized in that: The bottom of each of the two support plates (19) is fixedly connected to a second support frame (34), and the bottom of each second support frame (34) is fixedly connected to a second anti-slip block (35).

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