An efficient multi-cell suspension preparation device

Abstract

The present invention belongs to the technical field of cell suspension preparation, and provides a high-efficiency multi-cell suspension preparation device, including a shell and a cover plate, wherein the shell and the cover plate are detachably connected, a liquid extraction tube is fixedly installed on the cover plate, a crushing blade is arranged at the bottom of the shell, and a first rotating power part driving the crushing blade to rotate is fixedly installed at the bottom of the shell; a bottom plate is arranged on the cover plate, and a telescopic part driving the bottom plate to rise and fall is fixedly installed on the cover plate, so as to solve the technical problems in the prior art of untimely cleaning of cell filter membranes and poor cleaning effects leading to poor cell filtration effects. When the present invention is used, after the liquid pushing blades and the filter membrane are immersed in the liquid, the liquid pushing blades rotate driven by the power assembly and the support shaft, so that the liquid pushing blades will push the liquid to flow upwards, and the liquid will flush the surface of the filter membrane during the upward flow. The present invention can be widely used in filtration scenarios.

Description

Technical Field

[0001] The invention belongs to the technical field of cell suspension preparation, and in particular relates to a highly efficient multi-cell suspension preparation device. Background Art

[0002] The main sources of cell samples are: blood, tissue fluid, tissue, etc. At present, it is the most difficult to obtain tissue cell suspension. The operation process requires low temperature and fast speed to maintain cell activity and reduce cell loss. The prepared suspension must be clean and free of impurities or cell clusters to avoid clogging the microfluidic chip.

[0003] In the existing cell suspension preparation process, the efficiency is low, and the separation step and the filtration step are often performed separately, which easily causes the suspension to be contaminated. In response to the above technical problems, the applicant has retrieved some prior arts, such as the Chinese patent with patent announcement number CN215162615U. When in use, the cell filter membrane is cleaned by a cleaning brush at the bottom, but tissue fragments will float in the cell fluid, so that the cell filter membrane may be blocked during the descent process, affecting the filtration of cells, and the cell filter membrane can only be cleaned at the lowest point. At this time, the cell tissues are gathered together, which reduces the cleaning effect of the cell filter membrane. Summary of the invention

[0004] The purpose of the present invention is to provide an efficient multi-cell suspension preparation device, aiming to solve the technical problem in the prior art that the cell filtration membrane is not cleaned in time and the cleaning effect is poor, resulting in poor cell filtration effect.

[0005] The present invention is implemented as follows: an efficient multi-cell suspension preparation device comprises a shell and a cover plate, wherein the shell and the cover plate are detachably connected, a liquid extraction tube is fixedly installed on the cover plate, a crushing blade is arranged at the bottom of the shell, and a first rotating power member that drives the crushing blade to rotate is fixedly installed at the bottom of the shell;

[0006] The cover plate is provided with a base plate and a telescopic part for driving the base plate to be lifted and lowered is fixedly installed on the cover plate, the outer side surface of the base plate is in sealing and sliding contact with the inner wall of the shell, a plurality of groups of mounting mesh covers are fixedly installed on the surface of the base plate away from the cover plate, the base plate is provided with through holes located in the coverage area of ​​the mounting mesh covers, a filter membrane is arranged on the mounting mesh covers, a plurality of groups of supporting shafts are arranged on the base plate, the supporting shafts correspond to the positions of the mounting mesh covers and are coaxially arranged, a liquid pushing blade is fixedly installed on one end of the supporting shaft close to the mounting mesh cover, and a power component for driving the supporting shaft to rotate is arranged on the cover plate.

[0007] Further technical solution: a base plate is fixedly mounted on the output end of the telescopic member, a guide rod is fixedly mounted on the base plate, the guide rod passes through the cover plate and is slidably connected to the cover plate, and the guide rod is fixedly connected to the bottom plate.

[0008] Further technical solution: a plurality of groups of the mounting mesh covers are distributed in a circular array around the axis of the base plate, the mounting mesh covers are configured as a connected cylindrical structure and a truncated cone structure, and the mounting mesh cover cylindrical structure is fixedly connected to the base plate.

[0009] Further technical solution: Two sets of semicircular fixing plates are arranged on the mounting mesh cover, and the two sets of fixing plates form a complete circular structure to fix the bottom of the filter membrane on the mounting mesh cover. The two sets of fixing plates are detachably connected, and the cross-section of the fixing plates is a right-angled triangle structure.

[0010] Further technical solution: The power assembly includes a rotating shaft, which is rotatably mounted on the base plate and parallel to the guide rod. The rotating shaft passes through the cover plate and the bottom plate. A gear ring is fixedly mounted on the end of the rotating shaft away from the base plate. The gear ring is meshed with a gear fixedly mounted on the support shaft. A second rotating power component that drives the rotating shaft to rotate is fixedly mounted on the base plate.

[0011] Further technical solution: a plurality of groups of collecting mesh covers are fixedly installed on the bottom plate, the collecting mesh covers correspond to the positions of the installing mesh covers and are coaxially arranged, the collecting mesh covers are arranged around the corresponding installing mesh covers, the collecting mesh covers are detachably connected to the bottom plate, a cross plate is fixedly installed on one end of the collecting mesh cover away from the bottom plate, and the support shaft is rotatably installed on the cross plate.

[0012] Further technical solution: A separation cylinder is fixedly installed at one end of the support shaft close to the base plate, and the separation cylinder is arranged as a connected cylindrical structure and a conical structure. The separation cylinder is coaxially arranged with the mounting mesh cover and the separation cylinder is arranged around the mounting mesh cover. A gap is arranged between the separation cylinder and the base plate, and the liquid pushing blades are located in the separation cylinder. A plurality of groups of filter holes are provided on the top of the conical structure of the separation cylinder, and a plurality of groups of evenly distributed liquid pushing plates are fixedly installed on the outer side of the separation cylinder.

[0013] Further technical solution: Multiple groups of baffles are fixedly installed on the inner bottom surface of the collecting net cover, and the multiple groups of baffles are distributed in a circular array around the axis of the collecting net cover. The baffles are triangular structures, and the distance between two adjacent groups of baffles close to the side gradually decreases in the direction away from the separation tube.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. After the liquid-pushing blade and the filter membrane are immersed in the liquid, the liquid-pushing blade rotates driven by the power assembly and the support shaft, so that the liquid-pushing blade will push the liquid to flow upward. The liquid will flush the surface of the filter membrane during the upward flow, thereby preventing tissue fragments from adhering to the filter membrane, and can clean the filter membrane in time to ensure the filtering and separation effect of the filter membrane and the preparation effect of the cell suspension.

[0016] 2. The channel formed by the separation tube and the filter membrane guides and restricts the flow of liquid, thereby increasing the flow rate of the liquid, and then increasing the impact of the liquid on the tissue fragments on the filter membrane, improving the cleaning effect of the filter membrane, and ensuring the filtering and separation effect of the filter membrane. The liquid will push the tissue fragments upward from the top of the separation tube, and guide them above the separation tube through the inclined surface of the fixed plate, so that the liquid can push the tissue fragments into the collection mesh cover and be located on the outside of the baffle, avoiding the tissue fragments from contacting the filter membrane again, and further reducing the probability of filter membrane clogging.

[0017] 3. When the separation cylinder rotates, the push plate rotates synchronously. The rotation of the push plate causes the liquid around the separation cylinder to generate a vortex that moves away from the separation cylinder, and then the tissue fragments will move away from the separation cylinder under the action of the vortex. Finally, the liquid drives the tissue fragments to pass through the baffle through the gap between the baffles. Due to the action of the vortex, the liquid always flows to the outside of the baffle. At the same time, the liquid between the separation cylinder and the filter membrane flows to the side wall of the collecting mesh cover, and then the liquid will flow out from the side wall of the collecting mesh cover, thereby ensuring that the tissue fragments are located between the collecting mesh cover and the baffle for collection, thereby gradually reducing the tissue fragments in the liquid, further reducing the influence of the tissue fragments on the filter membrane, further improving the cell separation effect, and ensuring the preparation effect of the cell fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the cover plate in the present invention.

[0020] Figure 3 It is a schematic diagram of the structure inside the shell of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the bottom plate of the present invention.

[0022] Figure 5 It is a structural schematic diagram of installing the mesh cover in the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the collecting hood cylinder in the present invention.

[0024] Figure 7 It is a schematic diagram of the cross-sectional structure of the collecting hood cylinder in the present invention.

[0025] Figure 8 It is a schematic cross-sectional structure diagram of installing the mesh cover in the present invention.

[0026] Fig. 9 for Figure 8 A magnified schematic diagram of the A1 region in the middle.

[0027] Fig.10It is a top view of the collecting cover cylinder in the present invention.

[0028] In the attached drawings: 1. Shell; 2. Cover plate; 3. First rotating power member; 4. Crushing blade; 5. Telescopic member; 6. Second rotating power member; 7. Rotating shaft; 8. Guide rod; 9. Bottom plate; 10. Liquid extraction tube; 11. Through hole; 12. Mounting mesh cover; 13. Collecting mesh cover; 14. Transverse plate; 15. Support shaft; 16. Liquid pushing blade; 17. Gear; 18. Separation cylinder; 19. Liquid pushing plate; 20. Baffle; 21. Filter membrane; 22. Fixed plate; 23. Filter hole; 24. Gear ring; 25. Base plate; 26. Power assembly. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0031] like Figure 1-Figure 10 As shown, an efficient multicellular suspension preparation device provided by the present invention comprises a housing 1 and a cover plate 2, wherein the housing 1 and the cover plate 2 are detachably connected, a crushing blade 4 is arranged at the bottom of the housing 1, and a first rotating power member 3 is fixedly installed at the bottom of the housing 1 to drive the crushing blade 4 to rotate;

[0032] A bottom plate 9 is arranged on the cover plate 2, and a telescopic member 5 for driving the bottom plate 9 to rise and fall is fixedly installed on the cover plate 2, a base plate 25 is fixedly installed on the output end of the telescopic member 5, a guide rod 8 is fixedly installed on the base plate 25, the guide rod 8 penetrates the cover plate 2 and is slidably connected to the cover plate 2, the guide rod 8 is fixedly connected to the bottom plate 9, the outer side surface of the bottom plate 9 is in sealed sliding contact with the inner wall of the shell 1, a plurality of groups of mounting mesh covers 12 are fixedly installed on the surface of the bottom plate 9 away from the cover plate 2, the bottom plate 9 is provided with a through hole 11 located in the coverage area of ​​the mounting mesh cover 12, a filter membrane 21 is arranged on the mounting mesh cover 12, two groups of semicircular fixed plates 22 are arranged on the mounting mesh cover 12, and the two groups of fixed plates 22 A complete circular structure is formed to fix the bottom of the filter membrane 21 on the mounting mesh cover 12. The two groups of fixing plates 22 are detachably connected. The cross-section of the fixing plate 22 is a right-angled triangle structure. Multiple groups of mounting mesh covers 12 are distributed in a circular array around the axis of the bottom plate 9. The mounting mesh cover 12 is configured as a connected cylindrical structure and a truncated cone structure. The cylindrical structure of the mounting mesh cover 12 is fixedly connected to the bottom plate 9. Multiple groups of support shafts 15 are arranged on the bottom plate 9. The support shafts 15 correspond to the positions of the mounting mesh covers 12 and are coaxially arranged. A liquid pushing blade 16 is fixedly installed at one end of the support shaft 15 close to the mounting mesh cover 12, and a power component 26 for driving the support shaft 15 to rotate is provided on the cover plate 2.

[0033] In actual application of this embodiment, before use, the filter membrane 21 is sleeved on the mounting mesh cover 12 and fixed by two sets of fixing plates 22. At this time, the filter membrane 21 completely wraps the mounting mesh cover 12. An appropriate amount of solution for preparing a cell suspension is added to the shell 1 and the biological tissue raw material is placed in the shell 1. The first rotating power member 3 drives the crushing blade 4 to rotate to crush and separate the biological tissue. After the crushing and separation is completed, the telescopic member 5 drives the base plate 25 to move downward so that the bottom plate 9 moves downward in the shell 1. At the same time, the power component 26 drives the multiple groups of support shafts 15 to rotate. When the bottom plate 9 enters the liquid, the liquid and cells in the shell 1 can pass through the filter membrane 21 and move to the top of the bottom plate 9. The tissue fragments in the liquid will be blocked by the filter membrane 21, thereby completing the separation of the cells. The device for extracting the cell suspension from the outside is connected to the liquid extraction tube 10. The liquid extraction tube 10 is a hose of sufficient length to ensure that its lower end can be extended into the liquid to extract the cell suspension. After the extraction is completed, the cover plate 2 is removed to clean the tissue residue;

[0034] After the liquid-pushing blade 16 and the filter membrane 21 are immersed in the liquid, the liquid-pushing blade 16 rotates driven by the power component 26 and the support shaft 15, so that the liquid-pushing blade 16 will push the liquid to flow upward. During the upward flow, the liquid will flush the surface of the filter membrane 21, thereby preventing tissue fragments from adhering to the filter membrane 21, ensuring the filtering and separation effect of the filter membrane 21, and ensuring the preparation effect of the cell suspension.

[0035] In an example of the present embodiment, the first rotating power component 3 is a first motor, and of course it can also be other components that can output rotational power, such as a hydraulic motor. The crushing blade 4 is driven to rotate by the first motor. The telescopic component 5 is an electric telescopic rod, and of course it can also be other components that can actively change the length, such as a hydraulic cylinder. The bottom plate 9 is driven up and down by the electric telescopic rod. The cover plate 2 is connected to the shell 1 by threads, and can also be fixed by screws and nuts. The two sets of fixing plates 22 can be connected by magnetic attraction, or they can be fixed by screws and nuts, which is convenient for the subsequent disassembly of the filter membrane 21 for replacement.

[0036] like Figure 1 , Figure 2 As shown, a high-efficiency multi-cell suspension preparation device provided by the present invention, the power component 26 includes a rotating shaft 7, the rotating shaft 7 is rotatably mounted on the base plate 25 and is parallel to the guide rod 8, the rotating shaft 7 passes through the cover plate 2 and the bottom plate 9, and a gear ring 24 is fixedly mounted on the end of the rotating shaft 7 away from the base plate 25, the gear ring 24 is meshed with a gear 17 fixedly mounted on the support shaft 15, and a second rotating power component 6 is fixedly mounted on the base plate 25 to drive the rotating shaft 7 to rotate.

[0037] In actual application of this embodiment, the second rotating power member 6 drives the ring gear 24 to rotate through the rotating shaft 7, and the ring gear 24 drives the multiple groups of supporting shafts 15 to rotate synchronously through the multiple groups of meshing gears 17.

[0038] In an example of the present invention, the second rotating power component 6 is a second motor, and of course it can also be other components capable of outputting rotating power, such as a hydraulic motor, and the second motor drives the support shaft 15 to rotate.

[0039] like Figure 6-Figure 10 As shown, a high-efficiency multi-cell suspension preparation device provided by the present invention is provided, a plurality of collection mesh covers 13 are fixedly installed on the bottom plate 9, the collection mesh covers 13 correspond to the mounting mesh covers 12 in position and are coaxially arranged, the collection mesh covers 13 are arranged around the corresponding mounting mesh covers 12, the collection mesh covers 13 and the bottom plate 9 are detachably connected, a cross plate 14 is fixedly installed on one end of the collection mesh cover 13 away from the bottom plate 9, and a support shaft 15 is rotatably installed on the cross plate 14.

[0040] Specifically, a separation cylinder 18 is fixedly installed at one end of the support shaft 15 close to the base plate 9. The separation cylinder 18 is configured as a connected cylindrical structure and a conical structure. The separation cylinder 18 is coaxially arranged with the mounting mesh cover 12 and the separation cylinder 18 is arranged around the mounting mesh cover 12. A gap is arranged between the separation cylinder 18 and the base plate 9. The liquid pushing blades 16 are located in the separation cylinder 18. A plurality of groups of filter holes 23 are provided on the top of the conical structure of the separation cylinder 18. A plurality of groups of evenly distributed liquid pushing plates 19 are fixedly installed on the outer side of the separation cylinder 18.

[0041] Specifically, a plurality of baffles 20 are fixedly installed on the inner bottom surface of the collecting net cover 13. The plurality of baffles 20 are distributed in a circular array around the axis of the collecting net cover 13. The baffles 20 are triangular structures, and the distance between two adjacent baffles 20 near the side gradually decreases in the direction away from the separation tube 18.

[0042] In actual application, the present embodiment surrounds the mounting mesh cover 12 by the collecting mesh cover 13, and the rotation of the support shaft 15 drives the separation cylinder 18 and the liquid pushing blade 16 to rotate. The liquid pushing blade 16 rotates to push the liquid between the separation cylinder 18 and the filter membrane 21 to flow upward. During the upward flow of the liquid, the cells in the liquid can pass through the filter membrane 21 and the mounting mesh cover 12, thereby completing the filtration and separation of the cells. During the upward flow of the liquid, the surface of the filter membrane 21 is flushed, thereby preventing tissue fragments from adhering to the filter membrane 21. The channel guides and restricts the flow of the liquid, thereby increasing the flow rate of the liquid, and further increasing the impact of the liquid on the tissue fragments on the filter membrane 21, improving the cleaning effect of the filter membrane 21, and ensuring the filtering and separation effect of the filter membrane 21. The liquid will push the tissue fragments upward from the top of the separation cylinder 18, and guide them above the separation cylinder 18 through the inclined surface of the fixing plate 22, so that the liquid can push the tissue fragments into the collection net cover 13 and be located outside the baffle 20, so as to prevent the tissue fragments from contacting the filter membrane 21 again, and further reduce the probability of clogging of the filter membrane 21;

[0043] When the liquid in the separation cylinder 18 moves upward, the liquid below the separation cylinder 18 can enter the separation cylinder 18 from the filter hole 23, and the larger tissue fragments in the liquid will be filtered by the filter hole 23. Since the lower end of the separation cylinder 18 is a pointed tip and the separation cylinder 18 rotates continuously, the liquid below the separation cylinder 18 will impact the lower end of the separation cylinder 18 upward, so that the tissue fragments blocked by the filter hole 23 will move upward along the side wall of the separation cylinder 18. When the separation cylinder 18 rotates, the liquid pushing plate 19 rotates synchronously. The rotation of the liquid pushing plate 19 causes the liquid around the separation cylinder 18 to generate a vortex moving away from the separation cylinder 18, and the tissue fragments will be Under the action of the vortex, the liquid moves away from the separation cylinder 18, and finally the tissue fragments are driven by the liquid to pass through the baffle 20 through the gap between the baffles 20. Due to the action of the vortex, the liquid always flows to the outside of the baffle 20. At the same time, the liquid between the separation cylinder 18 and the filter membrane 21 flows to the side wall of the collecting mesh cover 13, and then the liquid will flow out from the side wall of the collecting mesh cover 13, thereby ensuring that the tissue fragments are located between the collecting mesh cover 13 and the baffle 20 for collection, thereby gradually reducing the tissue fragments in the liquid, further reducing the influence of the tissue fragments on the filter membrane 21, further improving the cell separation effect, and ensuring the preparation effect of the cell fluid.

[0044] In one embodiment of the present invention, the collecting mesh cover 13 is fixedly mounted on the bottom plate 9 by fixing screws. Of course, it can also be other easily disassembled connection structures such as threads, so as to facilitate the subsequent disassembly of the collecting mesh cover 13 to clean the tissue fragments therein.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An efficient multi-cell suspension preparation device, comprising a housing (1) and a cover plate (2), wherein the housing (1) and the cover plate (2) are detachably connected, and a liquid extraction tube (10) is fixedly mounted on the cover plate (2), characterized in that: A crushing blade (4) is arranged at the bottom of the shell (1), and a first rotating power member (3) is fixedly mounted at the bottom of the shell (1) for driving the crushing blade (4) to rotate; The cover plate (2) is provided with a bottom plate (9) and a telescopic member (5) is fixedly mounted on the cover plate (2) for driving the bottom plate (9) to rise and fall. The outer side surface of the bottom plate (9) is in sealing sliding contact with the inner wall of the housing (1). A plurality of groups of mounting mesh covers (12) are fixedly mounted on the surface of the bottom plate (9) away from the cover plate (2). The bottom plate (9) is provided with a through hole (11) located within the coverage area of ​​the mounting mesh cover (12). A filter membrane (21) is arranged on the mounting mesh cover (12). A plurality of groups of supporting shafts (15) are arranged on the bottom plate (9). The supporting shafts (15) correspond to the mounting mesh cover (12) in position and are coaxially arranged. A liquid pushing blade (16) is fixedly mounted on one end of the supporting shaft (15) close to the mounting mesh cover (12). A power assembly (26) for driving the supporting shaft (15) to rotate is arranged on the cover plate (2). A base plate (25) is fixedly mounted on the output end of the telescopic member (5), a guide rod (8) is fixedly mounted on the base plate (25), the guide rod (8) penetrates the cover plate (2) and is slidably connected to the cover plate (2), and the guide rod (8) is fixedly connected to the bottom plate (9).

2. The highly efficient multi-cell suspension preparation device according to claim 1, characterized in that: A plurality of groups of the mounting mesh covers (12) are distributed in a circular array around the axis of the bottom plate (9); the mounting mesh covers (12) are configured as a connected cylindrical structure and a truncated cone structure; the cylindrical structure of the mounting mesh covers (12) is fixedly connected to the bottom plate (9).

3. The device for preparing a high-efficiency multi-cell suspension according to claim 2, characterized in that: The mounting mesh cover (12) is provided with two sets of fixing plates (22) of semicircular structure, the two sets of fixing plates (22) forming a complete circular structure to fix the bottom of the filter membrane (21) on the mounting mesh cover (12), the two sets of fixing plates (22) are detachably connected, and the cross section of the fixing plates (22) is a right-angled triangle structure.

4. The device for preparing a high-efficiency multi-cell suspension according to claim 1, characterized in that: The power assembly (26) comprises a rotating shaft (7), which is rotatably mounted on the base plate (25) and parallel to the guide rod (8). The rotating shaft (7) passes through the cover plate (2) and the bottom plate (9). A gear ring (24) is fixedly mounted on the end of the rotating shaft (7) away from the base plate (25). The gear ring (24) meshes with a gear (17) fixedly mounted on the support shaft (15). A second rotating power member (6) is fixedly mounted on the base plate (25) for driving the rotating shaft (7) to rotate.

5. The device for preparing a high-efficiency multi-cell suspension according to claim 1, characterized in that: A plurality of groups of collecting screens (13) are fixedly mounted on the bottom plate (9); the collecting screens (13) correspond to the mounting screens (12) in position and are coaxially arranged; the collecting screens (13) are arranged around the corresponding mounting screens (12); the collecting screens (13) and the bottom plate (9) are detachably connected; a transverse plate (14) is fixedly mounted on one end of the collecting screens (13) away from the bottom plate (9); and a support shaft (15) is rotatably mounted on the transverse plate (14); A separation cylinder (18) is fixedly mounted on one end of the support shaft (15) close to the bottom plate (9); the separation cylinder (18) is configured as a connected cylindrical structure and a conical structure; the separation cylinder (18) is coaxially arranged with the mounting mesh cover (12) and the separation cylinder (18) is arranged around the mounting mesh cover (12); a gap is provided between the separation cylinder (18) and the bottom plate (9); a liquid pushing blade (16) is located in the separation cylinder (18); a plurality of filter holes (23) are provided on the top of the conical structure of the separation cylinder (18); and a plurality of evenly distributed liquid pushing plates (19) are fixedly mounted on the outer side surface of the separation cylinder (18); A plurality of groups of baffles (20) are fixedly mounted on the inner bottom surface of the collecting mesh cover (13), the plurality of groups of baffles (20) being distributed in a circular array around the axis of the collecting mesh cover (13), the baffles (20) being of a triangular structure, and the distance between two adjacent groups of baffles (20) close to the side surface gradually decreasing in a direction away from the separation cylinder (18).

Images