Air separator and combined cleaning screen

Abstract

The utility model discloses a kind of winnowing device and combined cleaning screen, belong to grain processing technical field, the device is driven by the driving assembly rotation by being arranged by poking roll in winnowing chamber, the discharge opening of hopper is blocked by poking roll, and multiple material grooves are spaced apart on the surface of poking roll along circumference, so that the material in hopper can only be brought into winnowing chamber by material groove, the characteristics of gradually inclined discharge of material groove, the opening width of discharge opening and the opening width of material groove can be set as greater than the set thickness of material, while ensuring the uniform thickness of free-fall material, effectively avoid caking material jam in discharge opening, prevent material jam in discharge opening, ensure the safe use of winnowing device.

Description

Technical Field

[0001] This utility model relates to the field of grain processing technology, specifically to an air separation device and a combined cleaning screen. Background Technology

[0002] Before grain is put into storage, impurities in the grain need to be screened and removed to reduce the impurity content of the grain and thus meet the grain storage standards. When separating light impurities from grain, an air separation device is usually used. An air separation device is an agricultural machine that uses aerodynamics to separate light impurities from grain. Based on the difference in weight between grain and light impurities, the airflow carries away the light impurities from the grain. When performing air separation on grain, it is necessary to form a free-falling grain strip. In order to ensure that the airflow can pass through the grain strip smoothly, it is necessary to ensure that the cross-sectional width of the formed grain strip in the horizontal direction is narrow enough. For example, Chinese utility model patent with authorization announcement number CN215695851U discloses a high-efficiency, environmentally friendly and energy-saving raw grain impurity removal device. The feeding of its air separation system adopts gravity gate for material control. The material is piled on the gravity gate. When the weight of the piled raw grain is greater than the force of the counterweight lever system, the flip-up plate of the gravity gate opens around the central axis. The greater the weight of the piled grain, the larger the opening size. In order to control the width of the free-fall grain strip, the opening width of the gravity gate needs to be consistent with the width of the grain strip to be formed. When encountering clumps of grain, the clumps of grain are very likely to block the opening of the gravity gate, affecting the normal discharge of the hopper.

[0003] Based on this, the present invention designs an air separation device and a combined cleaning screen to solve the above problems. Utility Model Content

[0004] This invention provides an air separation device and a combined cleaning screen to solve the technical problem that the opening of the gravity gate is easily blocked by clumps of grain in the prior art.

[0005] According to one aspect of the present invention, an air separation device is provided, comprising a hopper, an air separation chamber, and a suction unit. The air separation chamber is located at the bottom of the hopper and communicates with a discharge port at the bottom of the hopper. The suction unit is connected to the air separation chamber. The air separation chamber has an air inlet and a discharge outlet. The device also includes a material leveling component, which includes a material-distributing roller and a drive unit for driving the material-distributing roller. The material-distributing roller is rotatably disposed within the air separation chamber along a horizontal axis. The material-distributing roller is used to abut against and block the discharge port at the bottom of the hopper. Multiple material grooves are spaced circumferentially on the surface of the material-distributing roller. The material grooves are used to load the material in the hopper and discharge it into the air separation chamber under the rotation of the material-distributing roller. The width of the material grooves gradually increases from the inside to the outside in the depth direction.

[0006] As a further embodiment of this utility model, a contouring seat is fixedly provided on the top surface of the air classifier chamber, and the two sides of the material-pushing roller in the width direction of the discharge port are the first side and the second side. The material trough is used to discharge the material loaded in the discharge port when it rotates to the first side of the material-pushing roller. The bottom end of the contouring seat is provided with a contouring part that matches the material-pushing roller, and the contouring part is arranged around the bottom end of the material-pushing roller and the second side.

[0007] As a further embodiment of this utility model, the air separation chamber is provided with at least one material flow plate, which is located below the material feeding roller to receive the material discharged from the material trough. The material flow plate is inclined to the horizontal plane to guide the material to roll downwards and leave the material flow plate.

[0008] As a further embodiment of this utility model, the air inlet includes a first air inlet and a second air inlet, which are arranged vertically at intervals. The first air inlet and the second air inlet are used in conjunction with the suction unit to form two air-separated airflows above and below the material flow plate.

[0009] As a further embodiment of this utility model, the first air inlet is located above the material flow plate, and an adjustment plate is provided on the outer surface of the first air inlet. The adjustment plate is used to cover part of the first air inlet to control the air intake area of ​​the first air inlet.

[0010] As a further embodiment of this utility model, an exhaust hole is provided on the side of the hopper, and the exhaust hole is connected to a suction unit through a pipeline to suck up dust from the material when the material enters the hopper.

[0011] As a further embodiment of this utility model, the exhaust port is arranged opposite to the feed inlet of the hopper, and a baffle plate is provided between the exhaust port and the feed inlet of the hopper. The baffle plate is used to prevent the grain from leaving the hopper through the exhaust port.

[0012] As a further embodiment of this utility model, the baffle plate includes a first baffle plate and a second baffle plate. The first baffle plate is disposed between the exhaust hole and the second baffle plate. There are gaps for air circulation between the second baffle plate and the top surface and the bottom surface of the hopper cavity. The first baffle plate abuts against the top surface of the hopper cavity and there is a gap for air circulation between the first baffle plate and the bottom surface of the hopper cavity.

[0013] As a further embodiment of this utility model, the air inlet is located at the first end of the air separation chamber along its length, the air suction unit is connected to the top surface of the second end of the air separation chamber along its length, and the lower part of the second end of the air separation chamber along its length is provided with a waste discharge port and a waste discharge component for discharging waste from the waste discharge port.

[0014] A combined cleaning screen includes the aforementioned air separation device.

[0015] This utility model has the following beneficial effects: This device uses a material-pushing roller driven by a drive assembly to rotate within the air classifier chamber. The roller blocks the outlet of the hopper, and multiple material troughs are spaced circumferentially on its surface. This allows material in the hopper to be carried into the air classifier chamber only through these troughs. By utilizing the gradually tilting discharge characteristics of the troughs, both the outlet opening width and the trough opening width can be set to be greater than the set thickness of the material. This ensures uniform thickness of the freely falling material while effectively preventing agglomerated material from getting stuck at the outlet, thus ensuring the safe operation of the air classifier.

[0016] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the stroke selection chamber structure of this utility model; Figure 3 This is a schematic diagram of the air inlet structure in this utility model.

[0018] Legend: 1. Hopper; 11. Discharge port; 12. Exhaust port; 13. Feed inlet; 14. Baffle plate; 141. First baffle plate; 142. Second baffle plate; 2. Air separation chamber; 21. Air inlet; 211. First air inlet; 212. Second air inlet; 22. Discharge port; 23. Feed roller; 231. Feed trough; 24. Drive unit; 25. Contouring seat; 26. Flow plate; 27. Adjusting plate; 28. Waste removal component; 3. Suction unit. Detailed Implementation

[0019] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0020] Please see Figure 1-3 The present invention provides a technical solution: an air separation device, including a hopper 1, an air separation chamber 2 and an air suction unit 3. The air separation chamber 2 is located at the bottom of the hopper 1 and is connected to the discharge port 11 opened at the bottom of the hopper 1. The air suction unit 3 is connected to the air separation chamber 2. The air separation chamber 2 is provided with an air inlet 21 and a discharge port 22. During operation, the material is conveyed into the hopper 1 through the feed inlet 13 and then discharged from the discharge outlet 11 at the bottom of the hopper 1 into the air classifier 2. The material entering the air classifier 2 will fall freely under the action of gravity and finally be discharged from the discharge outlet 22 of the air classifier 2. The material discharged from the discharge outlet 22 will enter the next process. The air separation chamber 2 is connected to the suction unit 3. The suction unit 3 can extract the gas in the air separation chamber 2. At the same time, the air separation chamber 2 has an air inlet 21. When the suction unit 3 extracts the gas in the air separation chamber 2, the air inlet 21 will draw outside air into the air separation chamber 2. An airflow will be formed between the suction unit 3 and the air inlet 21 in the air separation chamber 2. This airflow will pass through the free-falling material, thereby separating the light impurities in the material from the grain. To ensure that the thickness of the free-falling material is as uniform as possible, the air classifier also includes a material leveling component. The material leveling component includes a material-distributing roller 23 and a drive unit 24 for driving the material-distributing roller 23. The material-distributing roller 23 is rotatably disposed in the inner cavity of the air classifier chamber 2 along a horizontal axis. The material-distributing roller is used to abut against and block the discharge port 11 at the bottom of the hopper 1. Multiple material grooves 231 are spaced apart on the surface of the material-distributing roller 23 along the circumference. The material grooves 231 are used to load the material in the hopper 1 and discharge it into the air classifier chamber 2 under the rotation of the material-distributing roller 23. This device features a rotatable feeding roller 23 inside the air classifier chamber 2, driven by a drive unit 24. The feeding roller 23 abuts against the discharge port 11, blocking it and preventing material from directly entering the air classifier chamber 2. A material groove 231 is formed on the surface of the feeding roller 23. When the material groove 231 rotates to the range of the discharge port 11, material from the hopper 1 enters the material groove 231. As the feeding roller 23 continues to rotate, the material-filled material groove 231 gradually tilts towards a horizontal position. When the material groove 231 tilts to a certain angle, the material in the material groove 231... Under the influence of gravity, the material will slide from the trough 231 into the air classifier 2. Since the material slides from the trough 231, it is only affected by gravity and the friction between the materials. There are fewer factors affecting the sliding speed of the material, thus ensuring that the thickness of the material is uniform. At the same time, as the material in the trough 231 decreases, the tilt angle of the trough 231 gradually increases. As a result, the discharge speed of the trough 231 can be kept as consistent as possible. In the free-falling material, the thickness difference at different heights will not be large and will be within the set thickness range, which can ensure the air classifier effect of the airflow on the material. Meanwhile, the width of the trough 231 gradually increases from the inside to the outside in its depth direction, with the opening of the trough 231 being the widest. Since the material in the trough 231 gradually slides out due to its inclination, the opening width of the trough 231 does not affect the thickness of the material during free fall. Therefore, the opening width of the trough 231 can be greater than the set thickness of the material, making it easier for the material to enter the trough 231 and effectively preventing material jamming at the discharge port 11 of the hopper 1. Due to the large opening size of the trough 231, even clumps of material can easily enter the trough 231 and flow smoothly with the material. The tilted discharge trough 231 will not block the discharge port 11 of the hopper 1. If the lumpy material can only partially enter the trough 231, the lumpy material can be crushed by the squeezing of the inner surface of the trough 231 and the discharge port 11 as the trough 231 moves relative to the discharge port 11. Even if the lumpy material cannot enter the trough 231, the trough 231 will move to different positions of the discharge port 11 as the feeding roller 23 rotates. The material from other positions can also fill the trough 231 by entering the trough 231, effectively avoiding the blockage of the discharge port 11 of the hopper 1 by the lumpy material and ensuring the safe use of the whole device. This device uses a material-pushing roller 23 driven by a drive assembly to rotate within the air classifier chamber 2. The material-pushing roller 23 blocks the discharge port 11 of the hopper 1, and multiple material grooves 231 are spaced circumferentially on the surface of the material-pushing roller 23. This allows the material in the hopper 1 to be carried into the air classifier chamber 2 only through the material grooves 231. By utilizing the gradually tilting discharge characteristics of the material grooves 231, the opening width of both the discharge port 11 and the opening width of the material grooves 231 can be set to be greater than the set thickness of the material. This ensures that the thickness of the freely falling material is uniform, while effectively preventing lumpy material from getting stuck at the discharge port 11, thus preventing material jamming at the discharge port 11 and ensuring the safe use of the air classifier.

[0021] Specifically, the drive unit 24 includes a motor fixed on the outer surface of the air classifier chamber 2. The motor is driven by the feeding roller 23 via a synchronous belt. The feeding roller 23 is rotated by the motor. When it is necessary to adjust the air classifier speed, the speed of the feeding roller 23 can be controlled by adjusting the speed of the motor, thereby adjusting the flow rate of material from the hopper 1 into the air classifier chamber 2.

[0022] Furthermore, a contouring seat 25 is fixedly installed on the top surface of the inner cavity of the air separation chamber 2. The two sides of the material-pushing roller 23 in the width direction of the discharge port 11 are the first side and the second side. The material trough 231 is used to discharge the material loaded in the discharge port 11 when it rotates to the first side of the material-pushing roller 23. The bottom end of the contouring seat 25 is provided with a contouring part that matches the material-pushing roller 23. The contouring part is arranged around the bottom end and the second side of the material-pushing roller 23. like Figure 2As shown, a contouring seat 25 is fixedly installed on the top surface of the inner cavity of the air separation chamber 2. The contouring seat 25 is provided with a contouring part, which surrounds the bottom end and the second side of the feeding roller 23. Thus, only the first side of the feeding roller 23 is left empty, leaving space for the material trough 231 to discharge material, which can effectively prevent material leakage at the contact position between the feeding roller 23 and the discharge port 11.

[0023] Furthermore, at least one material flow plate 26 is provided in the air separation chamber 2. The material flow plate 26 is located below the material feeding roller 23 to receive the material discharged from the material trough 231. The material flow plate 26 is inclined to the horizontal plane to guide the material to roll down and leave the material flow plate 26. like Figure 2 As shown, in some examples, a material flow plate 26 is provided in the air separation chamber 2. The material flow plate 26 is located below the material feeding roller 23. When the material feeding roller 23 rotates and the material in the material trough 231 falls freely downwards, the material flow plate 26 will receive the material discharged from the material trough 231. When the material falls freely and hits the material flow plate 26, due to the weight difference between light impurities and grain, some light impurities will separate from the material when the material hits the material flow plate 26. Before air separation, the light impurities in the material are initially separated, which increases the separation effect of the light impurities in the material in the subsequent air separation. The material flow plate 26 is set at an inclination. When the material hits the material flow plate 26, it will slide down along the material flow plate 26 and finally slide off the material flow plate 26. The airflow in the air separation chamber 2 will pass through the material at this time and perform air separation on the material. By adding the material flow plate 26 to perform preliminary separation of light impurities in the material, the air separation effect of the material is improved. Specifically, one or more material flow plates 26 can be set. When one material flow plate 26 is set, the material flow plate 26 is located directly below the discharge position of the material trough 231. When multiple material flow plates 26 are set, the uppermost material flow plate 26 is located directly below the discharge position of the material trough 231, and the lower level material flow plate 26 is located directly below the discharge position of the upper level material flow plate 26, so that the material slides down between the multiple levels of material flow plates 26 in sequence.

[0024] Furthermore, the air inlet 21 includes a first air inlet 211 and a second air inlet 212. The first air inlet 211 and the second air inlet 212 are arranged vertically at intervals. The first air inlet 211 and the second air inlet 212 are used to cooperate with the suction unit 3 to form two air separation airflows above and below the material flow plate 26. like Figure 2As shown, in some examples, the air inlet 21 includes a first air inlet 211 and a second air inlet 212. The first air inlet 211 and the second air inlet 212 are arranged at intervals in the height direction. When the suction unit 3 draws gas from the air separation chamber 2, the first air inlet 211 and the second air inlet 212 will simultaneously replenish the air separation chamber 2, thereby forming two airflows at the opening positions of the first air inlet 211 and the second air inlet 212. By controlling the positions of the first air inlet 211 and the second air inlet 212, the two airflows pass over the top and bottom of the material flow plate 26, respectively. During the process of the material falling from the trough 231 to the material flow plate 26, one airflow will pass through the material to perform the first air separation. When the material slides off the material flow plate 26, the other airflow will pass through the material to perform the second air separation. The state of the material in the second air separation is different from that in the first air separation. Thus, light impurities at different positions can be separated, further improving the air separation effect of the material. like Figure 2 As shown, in this example, a material flow plate 26 is provided in the air separation chamber 2, the first air inlet 211 is located above the top of the material flow plate 26, and the second air inlet 212 is located below the top of the material flow plate 26. Furthermore, an adjustment plate 27 is provided on the outer surface of the first air inlet 211. The adjustment plate 27 is used to shield part of the first air inlet 211 to control the air intake area of ​​the first air inlet 211. like Figure 3 As shown, an adjustment plate 27 is installed on the outer surface of the first air inlet 211. The height of the adjustment plate 27 on the outer surface of the air separation chamber 2 can be adjusted. The adjustment plate 27 can block the first air inlet 211, thereby adjusting the air intake area of ​​the first air inlet 211 and controlling the air intake volume of the first air inlet 211 and the second air inlet 212, which can adapt to different usage environments.

[0025] Furthermore, an exhaust port 12 is provided on the side of the hopper 1. The exhaust port 12 is connected to the suction unit 3 through a pipe, which is used to suck away the dust in the material when the material enters the hopper 1. like Figure 1 As shown, the side of the hopper 1 is provided with an exhaust port 12, and the exhaust port 12 is connected to the suction unit 3 through a pipe. During operation, the material is fed into the hopper 1 through the feed port 13. When the material enters the hopper 1, the dust and light impurities in the material may be stirred up. At this time, the suction unit 3 will suck away the dust and light impurities in the hopper 1 through the exhaust port 12 to prevent the dust and light impurities in the hopper 1 from overflowing from the feed port 13 of the hopper 1 and polluting the outside air. Furthermore, the exhaust port 12 is arranged opposite to the feed inlet 13 of the hopper 1, and a baffle plate 14 is provided between the exhaust port 12 and the feed inlet 13 of the hopper 1. The baffle plate 14 is used to prevent the grain from leaving the hopper 1 through the exhaust port 12. like Figure 1 As shown, in this example, the exhaust port 12 and the feed port 13 on the hopper 1 are arranged opposite each other, and a baffle plate 14 is provided between the exhaust port 12 and the feed port 13. When the material enters the hopper 1 from the feed port 13, the grain on the surface may move towards the exhaust port 12 under the action of airflow. In order to prevent the grain from being discharged from the hopper 1 from the exhaust port 12, a baffle plate 14 is provided between the feed port 13 and the exhaust port 12 of the hopper 1. The baffle plate 14 can block the grain, causing the grain to lose speed. Subsequently, the grain will fall downward into the hopper 1. Dust and light impurities, due to their light weight, will be discharged from the exhaust port 12 after bypassing the baffle plate 14 with the airflow, thus avoiding waste of grain. Specifically, such as Figure 1 As shown, the baffle plate 14 includes a first baffle plate 141 and a second baffle plate 142. The first baffle plate 141 is disposed between the exhaust hole 12 and the second baffle plate 142. There are gaps for air circulation between the second baffle plate 142 and the top surface of the inner cavity of the hopper 1 and the bottom surface of the inner cavity of the hopper 1. The first baffle plate 141 abuts against the top surface of the inner cavity of the hopper 1 and there is a gap for air circulation between the first baffle plate 141 and the bottom surface of the inner cavity of the hopper 1. The cooperation of the first baffle plate 141 and the second baffle plate 142 makes the airflow path in the hopper 1 more complex, so that the grain can collide with the first baffle plate 141 or the second baffle plate 142 and fall down, making it more difficult for the grain in the material to be discharged from the exhaust port 12.

[0026] Furthermore, the air inlet 21 is located at the first end of the air separation chamber 2 along its length, and the suction unit 3 is connected to the top surface of the second end of the air separation chamber 2 along its length. The lower part of the second end of the air separation chamber 2 along its length is provided with a waste discharge port and a waste discharge component 28 for discharging waste from the waste discharge port. like Figure 1 As shown, an air inlet 21 is provided at the first end of the air separation chamber 2 along its length, and an air suction unit 3 is provided at the second end along its length. The air suction unit 3 is located at the top of the air separation chamber 2. When light impurities move from the first end of the air separation chamber 2 to the second end of the air separation chamber 2 with the airflow, dust will be directly sucked into the air suction unit 3. Meanwhile, impurities with a certain weight, such as empty grains, will gather downwards at the second end of the air separation chamber 2 under the action of gravity. A debris discharge component 28 is provided at the lower part of the second end of the air separation chamber 2. The debris discharge component 28 can discharge debris such as empty grains from the debris discharge port opened in the air separation chamber 2, separating dust from debris such as empty grains, and preventing larger debris such as empty grains from entering the air suction unit 3 and entering the subsequent filtration process. Specifically, the debris discharge component 28 adopts an auger, with one end of the auger connected to the debris discharge port along its length, through which debris at the second end of the air separation chamber 2 is discharged from the debris discharge port; A combined cleaning screen includes the aforementioned air separation device. By using the aforementioned air separation device, the overall operational safety of the combined cleaning screen can be effectively improved, and material jamming during use can be avoided.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An air separation device, comprising a hopper (1), an air separation chamber (2), and a suction unit (3), wherein the air separation chamber (2) is located at the bottom of the hopper (1) and communicates with a discharge port (11) opened at the bottom of the hopper (1), the suction unit (3) is connected to the air separation chamber (2), and the air separation chamber (2) is provided with an air inlet (21) and a discharge port (22), characterized in that: It also includes a material leveling component, which includes a material-distributing roller (23) and a drive unit (24) for driving the material-distributing roller (23). The material-distributing roller (23) is rotatably disposed in the inner cavity of the air classifier (2) along a horizontal axis. The material-distributing roller is used to abut against and block the discharge port (11) at the bottom of the hopper (1). The surface of the material-distributing roller (23) is provided with multiple material grooves (231) spaced apart along the circumference. The material grooves (231) are used to load the material in the hopper (1) and discharge it into the air classifier (2) under the rotation of the material-distributing roller (23). The width of the trough (231) gradually increases from the inside to the outside in its depth direction.

2. The air separation device according to claim 1, characterized in that: The top surface of the inner cavity of the air separation chamber (2) is fixedly provided with a contour seat (25). The two sides of the material-pushing roller (23) in the width direction of the discharge port (11) are the first side and the second side. The material trough (231) is used to discharge the material loaded in the discharge port (11) when it rotates to the first side of the material-pushing roller (23). The bottom end of the contour seat (25) is provided with a contour part that matches the material-pushing roller (23). The contour part is arranged around the bottom end of the material-pushing roller (23) and the second side.

3. The air separation device according to claim 1, characterized in that: At least one material flow plate (26) is provided in the air separation chamber (2). The material flow plate (26) is located below the material feeding roller (23) to receive the material discharged from the material trough (231). The material flow plate (26) is inclined to the horizontal plane to guide the material to roll down and leave the material flow plate (26).

4. The air separation device according to claim 3, characterized in that: The air inlet (21) includes a first air inlet (211) and a second air inlet (212). The first air inlet (211) and the second air inlet (212) are arranged vertically at intervals. The first air inlet (211) and the second air inlet (212) are used to cooperate with the suction unit (3) to form two air-separated airflows above the material flow plate (26) and below the material flow plate (26).

5. The air separation device according to claim 4, characterized in that: The first air inlet (211) is located above the material flow plate (26), and an adjustment plate (27) is provided on the outer surface of the first air inlet (211). The adjustment plate (27) is used to shield part of the first air inlet (211) to control the air intake area of ​​the first air inlet (211).

6. The air separation device according to claim 1, characterized in that: The hopper (1) has an exhaust hole (12) on its side. The exhaust hole (12) is connected to the suction unit (3) through a pipe and is used to suck away the dust in the material when the material enters the hopper (1).

7. The air separation device according to claim 6, characterized in that: The vent (12) is arranged opposite to the feed inlet (13) of the hopper (1), and a baffle (14) is provided between the vent (12) and the feed inlet (13) of the hopper (1). The baffle (14) is used to prevent the grain from leaving the hopper (1) through the vent (12).

8. The air separation device according to claim 7, characterized in that: The baffle plate (14) includes a first baffle plate (141) and a second baffle plate (142). The first baffle plate (141) is located between the exhaust hole (12) and the second baffle plate (142). There are gaps between the second baffle plate (142) and the top surface of the inner cavity of the hopper (1) and the bottom surface of the inner cavity of the hopper (1) for air circulation. The first baffle plate (141) abuts against the top surface of the inner cavity of the hopper (1) and there are gaps between it and the bottom surface of the inner cavity of the hopper (1) for air circulation.

9. The air separation device according to claim 1, characterized in that: The air inlet (21) is located at the first end of the air separation chamber (2) along its length. The suction unit (3) is connected to the top surface of the second end of the air separation chamber (2) along its length. The lower part of the second end of the air separation chamber (2) along its length is provided with a waste discharge port and a waste discharge component (28) for discharging waste from the waste discharge port.

10. A combined cleaning screen, characterized in that: Includes the air separation device as described in any one of claims 1-9.

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