Air sweeping mechanism and spray drying tower

Abstract

The utility model discloses an air sweeping mechanism and a spray drying tower, and relates to the technical field of drying towers. The air sweeping mechanism comprises a driving assembly, an adapter rod, an air sweeping rod, a roller and a first baffle; the switching rod is in transmission connection with the driving assembly, and the driving assembly is used for driving the switching rod to rotate around the first rotating axis; the air sweeping rod is fixedly connected to the end, away from the driving assembly, of the adapter rod. The roller is rotationally mounted at one end, close to the air sweeping rod, of the adapter rod through a bearing; a second rotating axis of the roller is parallel to the first rotating axis; the first baffle is connected to the end, close to the air sweeping rod, of the adapter rod, covers the upper portion of the gravity direction of the bearing and is in sealing fit with the roller. According to the air sweeping mechanism, the probability of occurrence of the problems such as jamming can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of drying towers, and particularly to an air-scraping mechanism and a spray drying tower. Background Art

[0002] A spray drying tower is a device used for drying biological pesticides, medicines, food microorganisms, etc. During its use, an air-scraping structure is used to blow the powder on the inner wall surface of the spray tower for collection.

[0003] However, when the existing air-scraping structure operates, problems such as jamming are likely to occur, affecting the normal operation of the spray drying tower. Summary of the Utility Model

[0004] This application provides an air-scraping mechanism and a spray drying tower to reduce the probability of the air-scraping mechanism getting jammed.

[0005] This application provides an air-scraping mechanism, including:

[0006] A driving component;

[0007] A transfer rod, which is in transmission connection with the driving component, and the driving component is used to drive the transfer rod to rotate around a first rotation axis;

[0008] An air-scraping rod, fixedly connected to one end of the transfer rod away from the driving component;

[0009] A roller, rotatably installed on one end of the transfer rod close to the air-scraping rod through a bearing, and a second rotation axis of the roller is parallel to the first rotation axis;

[0010] A first baffle, connected to one end of the transfer rod close to the air-scraping rod, the first baffle covers above the bearing in the direction of gravity, and is in sealing cooperation with the roller.

[0011] Advantageous Effects of This Application: In the air-scraping mechanism provided by this application, the first baffle can play a shielding role above the bearing to prevent powder from falling into the space where the bearing is located, reducing the probability of the bearing getting jammed due to powder falling into the bearing, and thus reducing the probability of the air-scraping mechanism getting jammed. Among them, the first baffle and the roller are in sealing cooperation, which can reduce the possibility of powder entering the space where the bearing is located from the gap between the first baffle and the roller, and can achieve the sealing of the periphery of the bearing, further reducing the probability of the bearing getting jammed due to powder falling into the bearing, so as to reduce the probability of the air-scraping mechanism getting jammed.

[0012] In some possible implementation manners, the first baffle is located above the roller in the direction of gravity, and the peripheral side of the first baffle covers the edge of the roller close to the bearing side;

[0013] The peripheral side of the first baffle is sleeved on a sealing ring, and the sealing ring abuts against an end surface of the roller facing one end of the first baffle.

[0014] In some possible implementations, the air sweeping mechanism further includes a second baffle, wherein the second baffle is disposed between the bearing and the first baffle, and the second baffle covers the upper side of the bearing in the direction of gravity.

[0015] In some possible implementations, the circumferential side of the second baffle is in contact with the inner wall of the roller facing the bearing;

[0016] The first baffle plate covers the upper side of the position where the second baffle plate and the roller are attached in the direction of gravity.

[0017] In some possible implementations, the air sweeping mechanism further includes a shielding member, the shielding member is disposed on a side of the first baffle away from the transfer rod, and an edge of the shielding member is connected to an end of the roller away from the transfer rod;

[0018] The side of the sealing ring away from the first baffle plate abuts against the inner wall of the shielding member on the side facing the first baffle plate.

[0019] In some possible implementations, the bearing includes a dust-proof bearing.

[0020] In some possible implementations, the air sweeping mechanism further includes a bearing block, and the bearing block is connected to an end of the transfer rod away from the driving assembly;

[0021] The bearing sleeve is arranged on the circumferential side of the bearing block, the inner ring of the bearing is connected to the bearing block, and the first baffle is connected to a side of the bearing block away from the transfer rod.

[0022] In some possible implementations, a first limiting edge is provided on a side of the bearing block away from the first baffle, the first limiting edge protrudes in a radial direction of the bearing block toward the roller, and the first limiting edge abuts against an end of the bearing away from the first baffle;

[0023] The air sweeping mechanism also includes a first limit plate, which is arranged on a side of the bearing block close to the first baffle, protrudes relative to the peripheral side of the bearing block, and abuts against an end of the bearing away from the first limit edge.

[0024] In some possible implementations, the roller is sleeved on the circumference of the bearing, and the roller is connected to the outer ring of the bearing;

[0025] A second limiting edge is provided at one end of the roller close to the transfer rod, the second limiting edge protrudes along the radial direction of the roller toward a side close to the bearing, and the second limiting edge abuts against one end of the bearing facing the first baffle;

[0026] The air sweeping mechanism also includes a second limit plate, which is connected to the side of the roller away from the first baffle plate, the second limit plate protrudes relative to the roller toward the side of the bearing, and the second limit plate abuts against the end of the bearing away from the first baffle plate.

[0027] In addition, the present application also provides a spray drying tower, comprising the air sweeping mechanism provided in the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 Shows a schematic diagram of the structure of the air sweep mechanism in some embodiments;

[0030] Figure 2 A partial structural schematic diagram of an air sweep mechanism in some embodiments is shown;

[0031] Figure 3 Shows Figure 2 A schematic diagram of the partially enlarged structure of part A;

[0032] Figure 4 The schematic diagram of the structure of the spray drying tower in some embodiments is shown.

[0033] Description of main component symbols:

[0034] 1000-air sweeping mechanism;

[0035] 100 - driving assembly; 110 - driving member; 120 - first gear; 130 - second gear;

[0036] 210-adapter rod; 220-air sweep rod;

[0037] 310-bearing block; 311-first limiting edge; 320-first limiting plate; 330-second limiting plate;

[0038] 400-bearing;

[0039] 510 - First baffle; 520 - Second baffle; 530 - Sealing ring;

[0040] 600 - Roller; 610 - Second limiting edge;

[0041] 710 - Shielding member;

[0042] 2000 - Drying tower;

[0043] M - First rotation axis; N - Second rotation axis. Detailed implementation manner

[0044] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0047] In the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0048] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0049] As Figure 1 and Figure 4 shown, an air-sweeping mechanism 1000 is provided in the embodiment and can be applied to a spray drying tower. During use, the air-sweeping mechanism 1000 can be used to purge the inner wall of the drying tower 2000 in the spray drying tower, so as to blow off the powder adhering to the inner wall of the drying tower 2000 for collecting this part of the powder. Among them, the powder can be powder such as medicine powder and food powder.

[0050] As Figures 1 to 3 shown, the air-sweeping mechanism 1000 may include a driving assembly 100, a transfer rod 210, an air-sweeping rod 220, a roller 600 and a first baffle 510.

[0051] One end of the transfer rod 210 may be drivingly connected to the driving assembly 100, and the transfer rod 210 can be driven by the driving assembly 100 to rotate around the first rotation axis M. One end of the air-sweeping rod 220 may be fixedly connected to the end of the transfer rod 210 away from the driving assembly 100, and the inside of the air-sweeping rod 220 may be communicated with the inside of the transfer rod 210. In some embodiments, the air-sweeping rod 220 may be connected to the transfer rod 210 by means of welding or threaded connection. When the driving assembly 100 drives the transfer rod 210 to rotate around the first rotation axis M, the air-sweeping rod 220 can be driven to rotate synchronously.

[0052] The roller 600 may be rotatably mounted on the transfer rod 210 near the air-sweeping rod 220 through a bearing 400. The second rotation axis N of the roller 600 may be parallel to the first rotation axis M.

[0053] The first baffle 510 may be connected to the transfer rod 210 near the air-sweeping rod 220. The first baffle 510 may cover above the gravity direction of the bearing 400, and the first baffle 510 is in sealing cooperation with the roller 600, so as to seal the upper part in the gravity direction of the bearing 400.

[0054] During use, one end of the adapter rod 210 away from the air sweeping rod 220 can be used to connect to a gas source. Airflow can be transported through the adapter rod 210 to the air sweeping rod 220 and blown towards the inner wall of the drying tower 2000 through the air sweeping rod 220. The roller 600 can be in contact with the inner wall of the drying tower 2000. When the driving assembly 100 drives the adapter rod 210 and the air sweeping rod 220 to rotate around the first rotation axis M, the roller 600 can roll along the inner wall of the drying tower 2000 to improve the stability of the air sweeping rod 220 during operation. During this process, the roller 600 can rotate around the second rotation axis N, which can reduce the friction between the roller 600 and the inner wall of the drying tower 2000, and further reduce the resistance during the rotation of the air sweeping rod 220.

[0055] In addition, the first baffle 510 can play a shielding role above the bearing 400 to prevent powder from falling into the space where the bearing 400 is located, reducing the probability of the powder falling into the bearing 400 and causing the bearing 400 to jam, and further reducing the probability of the air sweeping mechanism 1000 jamming. Among them, the first baffle 510 and the roller 600 are in sealed cooperation, which can reduce the possibility of powder entering the space where the bearing 400 is located from the gap between the first baffle 510 and the roller 600, further reducing the probability of the powder falling into the bearing 400 and causing the bearing 400 to jam, so as to reduce the probability of the air sweeping mechanism 1000 jamming.

[0056] As Figure 1 shown, the driving assembly 100 can include a driving member 110, a first gear 120, and a second gear 130. In some embodiments, the driving member 110 can be selected as a motor. The first gear 120 can be fixedly connected to the output shaft of the driving member 110. The second gear 130 can be fixedly connected to one end of the adapter rod 210 away from the air sweeping rod 220, and the second gear 130 is coaxially arranged with the adapter rod 210, that is, the rotation axis of the second gear 130 can coincide with the second rotation axis N of the adapter rod 210. In the embodiment, the rotation axis of the second gear 130 can be perpendicular to the rotation axis of the first gear 120, and the first gear 120 can be meshed with the second gear 130. When the driving member 110 drives the first gear 120 to rotate, it can drive the second gear 130 to rotate, and then the second gear 130 can drive the air sweeping rod 220 to rotate around the first rotation axis M through the adapter rod 210.

[0057] As Figures 1 to 3 shown, in some embodiments, one end of the adapter rod 210 away from the driving assembly 100 can be fixedly connected with a bearing block 310 by welding or the like. Among them, the bearing block 310 can be used as an installation carrier to carry related structures such as the roller 600. At the same time, the bearing block 310 can block one end of the adapter rod 210 away from the driving member 110 to prevent air leakage. The air sweeping rod 220 can be connected to the periphery of one end of the adapter rod 210 close to the bearing block 310 and is internally connected to the adapter rod 210.

[0058] In some embodiments, the bearing 400 can be a dust-proof bearing, which can further prevent powder from entering the inside of the bearing 400 and affecting the normal use of the bearing 400, further reducing the probability of the bearing 400 getting stuck, and thus reducing the probability of the air-sweeping mechanism 1000 getting stuck.

[0059] In an embodiment, the bearing 400 can be assembled on the periphery of the bearing block 310, and the inner ring of the bearing 400 can be fixedly connected to the bearing block 310 by means of tight fitting or interference fit. In some embodiments, the bearing 400 can be sleeved on the bearing block 310 from the end of the bearing block 310 away from the adapter rod 210. A first limiting edge 311 can be protrudingly provided at one end of the bearing block 310 close to the adapter rod 210. The first limiting edge 311 can protrude radially along the bearing block 310 and abut against one end of the inner ring of the bearing 400 close to the adapter rod 210. Thus, the bearing 400 can be restricted from detaching from the end of the bearing block 310 close to the adapter rod 210.

[0060] In some embodiments, the air-sweeping mechanism 1000 further includes a first limiting plate 320, and the first limiting plate 320 can be arranged at one end of the bearing block 310 facing away from the adapter rod 210. The first limiting plate 320 can protrude relative to the periphery of the bearing block 310, and the first limiting plate 320 can abut against one end of the inner ring of the bearing 400 facing away from the first limiting edge 311. Thus, the bearing 400 can be restricted from detaching from the end of the bearing block 310 facing away from the adapter rod 210. In an embodiment, the first limiting plate 320 can be fixedly installed on the bearing block 310 by means of screw connection or the like.

[0061] As Figures 1 to 3 shown, the roller 600 can be sleeved on the side of the bearing 400 away from the bearing block 310, and the roller 600 can be fixedly connected to the outer ring of the bearing 400. In some embodiments, the roller 600 can be sleeved on the periphery of the bearing 400 from the end of the bearing 400 away from the adapter rod 210. And a second limiting edge 610 can be provided at one end of the roller 600 away from the adapter rod 210. The second limiting edge 610 can protrude radially along the roller 600 and be arranged on the side of the roller 600 facing the bearing block 310. One end of the outer ring of the bearing 400 facing away from the adapter rod 210 can abut against the second limiting edge 610, and the bearing 400 can be restricted from detaching from the end of the roller 600 facing away from the adapter rod 210 by the second limiting edge 610.

[0062] In some embodiments, the air sweeping mechanism 1000 further includes a second limiting plate 330. The second limiting plate 330 can be annular. The second limiting plate 330 can be sleeved on the peripheral side of the bearing block 310, and the second limiting plate 330 can be fixedly connected to one end of the roller 600 away from the second limiting edge 610 by means of screw connection or the like. And the second limiting plate 330 can protrude relative to the roller 600 along the radial direction of the roller 600 towards the side close to the bearing 400. In the embodiment, the second limiting plate 330 can abut against one end of the roller 600 away from the second limiting edge 610, and can limit the bearing 400 from detaching from one end of the roller 600 close to the adapter rod 210.

[0063] In some embodiments, the roller 600 can be a roller structure made of food-grade polyethylene.

[0064] As Figures 1 to 3 shown, in some embodiments, the air sweeping mechanism 1000 further includes a second baffle plate 520. The second baffle plate 520 can be disposed on the side of the first limiting plate 320 away from the bearing block 310. In the embodiment, the second baffle plate 520 can be fixedly connected to the bearing block 310 by means of screw connection or the like. In some embodiments, the second baffle plate 520 and the first limiting plate 320 can be fixedly connected to the bearing block 310 by the same screw, and the second baffle plate 520 can be pressed against the side of the first limiting plate 320 away from the bearing block 310.

[0065] In the embodiment, the peripheral side of the second baffle plate 520 can protrude relative to the peripheral side of the first limiting plate 320, and the peripheral side of the second baffle plate 520 can be attached to the inner wall of the roller 600 on the side facing the bearing block 310. Thus, the upper part in the gravity direction of the bearing 400 can be blocked by the second baffle plate 520, and powder can be prevented from falling into the bearing 400 and affecting the normal operation of the bearing 400.

[0066] In some embodiments, the second baffle plate 520 can be made of stainless steel, which is beneficial to making the peripheral surface of the second baffle plate 520 smoother, improving the fitting effect between the peripheral side of the second baffle plate 520 and the roller 600, reducing the gap between the second baffle plate 520 and the roller 600, and reducing the possibility of powder passing through the gap between the second baffle plate 520 and the roller 600, thereby further reducing the possibility of the bearing 400 being stuck due to powder entering the interior.

[0067] As Figures 1 to 3 shown, in some embodiments, the first baffle plate 510 can be disposed on the side of the second baffle plate 520 away from the first limiting plate 320, and the first baffle plate 510 can be fixed to the side of the second baffle plate 520 away from the first limiting plate 320 by means of screw connection or the like. In some embodiments, the first baffle plate 510 and the second baffle plate 520 can be fixedly connected to the bearing block 310 by the same screw to achieve the fixed connection between the first baffle plate 510 and the adapter rod 210.

[0068] In the embodiment, the edge of the first baffle 510 can extend to one end of the roller 600 away from the second limiting plate 330 and cover the edge of the roller 600 on the side close to the bearing 400. In the embodiment, the first baffle 510 can further block the upper part in the gravity direction of the bearing 400 and can block the gap between the second baffle 520 and the roller 600. Thus, the probability of powder entering the space where the bearing 400 is located can be reduced, the probability of powder entering the bearing 400 can be further reduced, and the possibility of the bearing 400 being stuck can be reduced.

[0069] In some embodiments, the air sweeping mechanism 1000 further includes a sealing ring 530. The sealing ring 530 can be sleeved on the peripheral side of the first baffle 510, and the sealing ring 530 can abut against the end face of the roller 600 at one end away from the second limiting plate 330. Thus, the sealing of the assembly gap around the space where the bearing 400 is located can be realized, and the probability of powder entering the bearing 400 can be further reduced. In the embodiment, the sealing ring 530 can be fixed on the peripheral side of the first baffle 510 by interference fit or gluing, etc.

[0070] In other embodiments, the peripheral side of the first baffle 510 can be opposite to the inner wall of the roller 600 on the side facing the bearing block 310. One side of the sealing ring 530 away from the first baffle 510 can abut against the inner wall of the roller 600 on the side facing the bearing block 310 to realize the sealing of the assembly gap between the first baffle 510 and the roller 600.

[0071] In some embodiments, the first baffle 510 can be a baffle structure made of food-grade polyethylene.

[0072] As Figure 2 shown, in some embodiments, the air sweeping mechanism 1000 further includes a conical shielding member 710. The shielding member 710 can cover the side of the first baffle 510 away from the second baffle 520, and the shielding member 710 can be fixedly connected to the roller 600 by means of screw connection, etc. In the embodiment, the wall surface of the sealing ring 530 on the side away from the first baffle 510 can be attached to the inner wall of the shielding member 710.

[0073] In the air sweeping mechanism 1000 provided in the embodiment of the present application, by selecting a dust-proof bearing with a dust-proof function and arranging the first baffle 510 and the sealing ring 530 above the bearing 400 in the gravity direction, the possibility of powder entering the bearing 400 can be effectively reduced, the possibility of the bearing 400 being stuck can be reduced, and further the probability of the air sweeping mechanism 1000 being stuck can be reduced. The wear of the inner wall of the drying tower 2000 by the roller 600 can be reduced, and the service life of the air sweeping mechanism 1000 and the drying tower 2000 can be prolonged.

[0074] As Figures 2 to 4As shown, the embodiment also provides a spray drying tower, including a drying tower 2000 and an air sweeping mechanism 1000 provided in the embodiment. The air sweeping mechanism 1000 is installed in the drying tower 2000, the roller 600 can roll with the inner wall of the drying tower 2000, and the air sweeping rod 220 can be opposite to the inner wall of the drying tower 2000.

[0075] During use, the driving member 110 can drive the transfer rod 210 and the ventilation sweep rod 220 to rotate around the first rotation axis M to sweep various parts of the inner wall of the drying tower 2000. During this period, the roller 600 can move along the inner wall of the drying tower 2000.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An air sweeping mechanism, characterized in that: include: A drive assembly (100); A transfer rod (210) is transmission-connected to the driving assembly (100), and the driving assembly (100) is used to drive the transfer rod (210) to rotate around a first rotation axis (M); An air sweep rod (220) is fixedly connected to an end of the transfer rod (210) away from the drive assembly (100); A roller (600) is rotatably mounted on one end of the transfer rod (210) close to the air sweep rod (220) via a bearing (400), and a second rotation axis (N) of the roller (600) is parallel to the first rotation axis (M); The first baffle (510) is connected to one end of the transfer rod (210) close to the air sweep rod (220). The first baffle (510) covers the upper side of the bearing (400) in the direction of gravity and is sealed with the roller (600).

2. The air sweeping mechanism according to claim 1, characterized in that: The first baffle (510) is located above the roller (600) in the direction of gravity, and the peripheral side of the first baffle (510) covers the edge of the roller (600) close to the bearing (400); The circumferential side of the first baffle (510) is sleeved on a sealing ring (530), and the sealing ring (530) abuts against an end surface of the roller (600) facing one end of the first baffle (510).

3. The air sweeping mechanism according to claim 2, characterized in that: The air sweeping mechanism further comprises a second baffle (520), wherein the second baffle (520) is arranged between the bearing (400) and the first baffle (510), and the second baffle (520) covers the upper side of the bearing (400) in the direction of gravity.

4. The air sweeping mechanism according to claim 3, characterized in that: The circumferential side of the second baffle (520) is in contact with the inner wall of the roller (600) on the side facing the bearing (400); The first baffle (510) covers the upper side of the position where the second baffle (520) and the roller (600) are in contact with each other in the direction of gravity.

5. The air sweeping mechanism according to claim 2, characterized in that: The air sweeping mechanism further comprises a shielding member (710), the shielding member (710) being arranged to cover a side of the first baffle (510) away from the transfer rod (210), and an edge of the shielding member (710) being connected to an end of the roller (600) away from the transfer rod (210); The side of the sealing ring (530) away from the first baffle plate (510) abuts against the inner wall of the shielding member (710) on the side facing the first baffle plate (510).

6. The air sweeping mechanism according to any one of claims 1 to 5, characterized in that: The bearing (400) includes a dustproof bearing (400).

7. The air sweeping mechanism according to claim 1, characterized in that: The air sweeping mechanism further comprises a bearing block (310), wherein the bearing block (310) is connected to an end of the transfer rod (210) away from the driving assembly (100); The bearing (400) is sleeved on the circumferential side of the bearing block (310), the inner ring of the bearing (400) is connected to the bearing block (310), and the first baffle (510) is connected to a side of the bearing block (310) away from the transfer rod (210).

8. The air sweeping mechanism according to claim 7, characterized in that: A first limiting edge (311) is provided on a side of the bearing block (310) away from the first baffle (510), the first limiting edge (311) protruding in a radial direction of the bearing block (310) toward the roller (600), and the first limiting edge (311) abuts against an end of the bearing (400) away from the first baffle (510); The air sweeping mechanism further comprises a first limit plate (320), wherein the first limit plate (320) is arranged on a side of the bearing block (310) close to the first baffle (510), the first limit plate (320) protrudes relative to the peripheral side of the bearing block (310), and the first limit plate (320) abuts against an end of the bearing (400) away from the first limit edge (311).

9. The air sweeping mechanism according to claim 1, 7 or 8, characterized in that: The roller (600) is sleeved on the peripheral side of the bearing (400), and the roller (600) is connected to the outer ring of the bearing (400); A second limiting edge (610) is provided at one end of the roller (600) close to the transfer rod (210), and the second limiting edge (610) protrudes along the radial direction of the roller (600) toward a side close to the bearing (400), and the second limiting edge (610) abuts against one end of the bearing (400) facing the first baffle (510); The air sweeping mechanism further comprises a second limit plate (330), the second limit plate (330) being connected to a side of the roller (600) facing away from the first baffle plate (510), the second limit plate (330) protruding relative to a side of the roller (600) toward the bearing (400), and the second limit plate (330) abutting against an end of the bearing (400) facing away from the first baffle plate (510).

10. A spray drying tower, characterized in that: Comprising an air sweeping mechanism as claimed in any one of claims 1 to 9.

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