Silo flow changing device

Abstract

The invention provides a silo flow changing device. The problem that the flow changing performance of a circular truncated cone type flow changing device cannot be adjusted is solved. The silo comprises a silo body, the lower end of the silo body is of a conical barrel structure with the diameter gradually reduced downwards, and a discharging opening for communicating the inside and the outside is formed in the bottom of the silo body; a hollow interlayer which extends in the vertical direction and is communicated end to end in the horizontal direction is arranged in the side wall of the silo, and a plurality of ventilation holes communicated with the hollow interlayer are formed in the outer side wall of the silo; a plurality of fans are arranged on the outer side wall of the silo, the fans are in control connection with the controller, and an air outlet of each fan communicates with the end, away from the hollow interlayer, of the corresponding ventilation hole; a distribution pipe communicated with the ventilation holes is fixedly arranged in the hollow interlayer; the bottom of the distribution pipe is provided with a plurality of first air supply pipes which are arranged at intervals in the circumferential direction of the distribution pipe and extend towards the lower portion of the distribution pipe, the first air supply pipes are connected with second air supply pipes, and the ends, away from the first air supply pipes, of the second air supply pipes penetrate into the silo and are connected with the air inlet end of the pneumatic flow changing device.

Description

Technical Field

[0001] This invention relates to the field of grain storage technology, and in particular to a silo diversion device. Background Technology

[0002] As a major agricultural country, China's food security has always been a major concern. Silos are widely used for grain storage due to their advantages such as small footprint, large capacity, low cost, and high level of mechanization. However, with the continuous increase in silo size and the rapid growth in their number, silo damage or collapse accidents occur frequently both domestically and internationally. The causes of these accidents are complex and varied, with overpressure during the unloading of bulk materials being a significant contributing factor. Therefore, there is an urgent need to develop a diversion device that can redirect unloading and effectively suppress overpressure.

[0003] In the prior art, the invention patent application with application number 202110754015.7 discloses a silo frustum-shaped diversion device, which includes a funnel-shaped frustum as the main diversion structure. The device is placed in the following manner: the normal of the frustum-shaped diversion device coincides with the normal of the discharge port of the vertical silo, and the diversion device is welded to the inner wall of the funnel of the vertical silo by four steel support rods to fix the frustum-shaped diversion device inside the silo. In order to ensure the effectiveness and installation stability of the frustum-shaped diversion device, the height of the frustum-shaped diversion device and the height from the bottom of the device to the discharge port are not greater than the height of the funnel, and the size of the lower opening of the device is smaller than the size of the discharge port. However, the device also has the following disadvantages when in use: the flow state of the material is diverted by the geometry of the fixed structure itself, and its diversion performance cannot be adjusted, and it cannot adapt to the diversion requirements of materials with different particle weights; (2) the frustum-shaped diversion device itself will greatly reduce the material flow speed and prolong the material outflow time, which is not conducive to the rapid removal of materials. Summary of the Invention

[0004] To address the problem of the inability to adjust the flow diversion performance of frustum-shaped flow diversion devices in the prior art, this invention proposes a silo flow diversion device.

[0005] The technical solution of the present invention is: a silo diversion device, comprising a silo, the lower end of which is a conical cylinder structure with a gradually decreasing diameter, and the bottom of the silo is provided with a discharge port for internal and external communication; The silo has a hollow interlayer extending vertically and connected horizontally inside its side wall, and a number of ventilation holes spaced circumferentially on its outer side wall and connected to the hollow interlayer. Multiple fans are installed on the outer wall of the silo. The fans are connected to the controller, and the air outlet of each fan is connected to the end of the ventilation hole away from the hollow interlayer. The hollow interlayer is fixedly equipped with a distribution pipe that is coaxial with the silo and has a circumferential structure, and the interior of the distribution pipe is connected to all the ventilation holes. The bottom of the distribution pipe is provided with a plurality of first air supply pipes that are spaced apart along its circumference and extend downward therefrom. A second air supply pipe is connected to the first air supply pipe. The end of the second air supply pipe away from the first air supply pipe passes into the silo and is connected to the air inlet of the pneumatic diversion device. The pneumatic diversion device includes a vertically arranged mounting pipe with an air inlet on it. The lower end of the mounting pipe is closed, and a mounting plate is fixedly fitted at the upper end of the mounting pipe. A hemispherical cover is fixedly fitted on the top of the mounting plate. The internal space enclosed by the hemispherical cover and the mounting plate is connected to the upper end of the mounting pipe. The hemispherical cover has several concentric and radially distributed air holes. The hemispherical cover is coaxially arranged with the silo.

[0006] Preferably, the pneumatic diversion device further includes a flow guide net that is spaced around the outside of the hemispherical cover. The flow guide net has a spherical structure and is concentrically arranged with the hemispherical cover. The hemispherical cover is fixedly connected to the mounting pipe through a connecting frame, and the aperture of the hemispherical cover is smaller than the particle size of the material.

[0007] Preferably, the silo is equipped with multiple pneumatic diversion devices arranged at intervals.

[0008] Preferably, a first electromagnetic regulating valve is provided at the connection between the first air supply pipe and the distribution pipe. The first electromagnetic regulating valve is connected to the controller and is used to regulate the exhaust airflow intensity of all pneumatic diversion devices.

[0009] Preferably, the bottom of the distribution pipe is provided with a plurality of second air supply pipes that are spaced apart along its circumference and extend downward therefrom, and the inner wall of the silo is provided with a pneumatic acceleration device.

[0010] The pneumatic acceleration device includes a guide plate fixed on the inner wall of the silo. The guide plate has a ring structure with the ends connected in the horizontal plane. The vertical cross section of the guide plate is a right trapezoidal structure with a smaller top and a larger bottom. The inclined surface of the guide plate is located on the side away from the inner wall of the silo. The bottom plate of the guide plate is provided with a perforated plate that is open at both the top and bottom. The internal space enclosed by the baffle plate and the inner wall of the silo is equipped with multiple air blowing pipes that are equidistantly spaced along its circumference. One end of the air blowing pipe passes through the hollow interlayer and is connected to the second air supply pipe, while the other end of the air blowing pipe extends directly above the perforated plate.

[0011] Preferably, the inner wall of the silo is provided with multiple pneumatic acceleration devices arranged at intervals.

[0012] Preferably, a second electromagnetic regulating valve is provided at the connection between the second air supply pipe and the distribution pipe. The second electromagnetic regulating valve is connected to the controller and is used to regulate the exhaust airflow intensity of all pneumatic acceleration devices.

[0013] Preferably, the air inlet of the fan is connected to one end of the air inlet pipe, and the other end of the air inlet pipe extends downward and is connected to the dust filter device; The dust filtration device includes a dust collection tank with an open top. The upper port of the dust collection tank can be detached at the lower port of the air inlet pipe. A vertically arranged second connecting rod is fixed inside the dust collection tank. The upper end of the second connecting rod passes through the air inlet pipe. A dust filter is fixed on the second connecting rod. The inner and outer diameters of the dust filter are equal to the inner diameter of the air inlet pipe. The dust filter slides inside the air inlet pipe. The air inlet pipe is connected to the upper end of the inclined tube. The upper end of the inclined tube is located between the dust filter screen and the dust collection tank, and the lower end of the inclined tube extends to the discharge port.

[0014] Preferably, the top of the second connecting rod is provided with a rotatable cleaning mechanism, which is used to clean the dust filter screen; The cleaning mechanism includes a vertically arranged rotating shaft, the lower end of which is rotatably connected to the top of the second connecting rod. A fan blade is fixed on the rotating shaft, and the fan blade can rotate as the airflow passes through the air intake pipe. A brush is provided on the rotating shaft, and the brush is located below the fan blade, with the brush bristles in contact with the top of the dust filter.

[0015] Preferably, a limiting ring is fixedly sleeved on the rotating shaft, and a spring is sleeved on the rotating shaft, with the upper end of the spring abutting against the bottom of the limiting ring; A movable ring is fitted on the rotating shaft and is splined to be able to move up and down. The spline connection between the rotating shaft and the movable ring is used to limit the rotation of the movable ring. The movable ring abuts against the lower end of the spring, and the brush is fixed on the movable ring.

[0016] Advantages of the present invention: (1) Pneumatic diversion: The controller controls the fan to deliver air to the pneumatic diversion device. When the high-speed airflow is discharged from the air hole on the hemispherical cover of the pneumatic diversion device, it will blow the material above the hemispherical cover toward the inner wall of the silo and reduce the flow rate of the material in the central area, so that the flow rate of the material in the outer area is consistent with the flow rate of the material in the central area, thereby achieving the purpose of "overall flow" of the material.

[0017] (2) Adjustable exhaust airflow intensity: By adjusting the working power of the blower through the controller, the exhaust airflow intensity of the pneumatic diversion device can be adjusted to meet the diversion requirements of materials with different particle sizes.

[0018] (3) Preventing heat accumulation in silos during winter: In winter, cold air from the outside can be sent into the material through a pneumatic diversion device by a fan, which can prevent heat accumulation in the material inside the silo. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the main structure of Example 1; Figure 2 for Figure 1 Enlarged view of the structure at point A in the image; Figure 3 for Figure 1 A schematic diagram of the pneumatic diversion device in the diagram; Figure 4 for Figure 1 A schematic diagram of the internal structure of the dust filtration device in the diagram; Figure 5 for Figure 4 A partial structural diagram of the cleaning mechanism in the middle; In the diagram, 1. Silo, 2. Discharge port, 3. Hollow core, 4. Protective shell, 5. Fan, 6. Ventilation hole, 7. Distribution pipe, 8. First air supply pipe, 9. Second air supply pipe, 10. Pneumatic diversion device, 11. Third air supply pipe, 12. Pneumatic acceleration device, 13. Mounting pipe, 14. Air inlet, 15. Mounting plate, 16. Hemispherical cover, 17. Air hole, 18. Pipe clamp, 19. First connecting rod, 20. Guide 21. Flow screen cover, 22. Flow guide plate, 23. Mesh plate, 24. Air blowing pipe, 25. Air inlet pipe, 26. Inclined pipe, 27. Dust filter device, 28. Dust collection tank, 29. Bottom cover, 30. Fixing sleeve, 31. Second connecting rod, 32. Dust filter mesh, 33. Rotating shaft, 34. Fan blade, 35. Limiting ring, 36. Spring, 37. Moving ring, 38. Brush, 39. First electromagnetic regulating valve, 40. Second electromagnetic regulating valve. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: A silo diversion device, such as Figure 1 As shown, it includes a silo 1, the lower end of which is a conical cylinder structure with a gradually decreasing diameter. The bottom of the silo 1 is provided with a discharge port 2 for internal and external communication.

[0023] like Figure 2 As shown, the side wall of the silo 1 is provided with a hollow interlayer 3 that extends vertically and is connected end to end horizontally. The outer side wall of the silo 1 is provided with a plurality of ventilation holes 6 that are spaced apart along its circumference and connected to the hollow interlayer 3.

[0024] Multiple fans 5 are provided on the outer wall of the silo 1. The fans 5 are connected to a controller (not shown in the figure, but a PLC controller can be used in this embodiment). The air outlet of each fan 5 is connected to the end of the ventilation hole 6 away from the hollow interlayer 3.

[0025] The hollow interlayer 3 is fixedly provided with a distribution pipe 7 that is coaxial with the silo 1 and has a circumferential structure, and the interior of the distribution pipe 7 is connected to all the ventilation holes 6.

[0026] The bottom of the distribution pipe 7 is provided with a plurality of first air supply pipes 8 that are spaced apart along its circumference and extend downward therefrom. A plurality of second air supply pipes 9 are connected to the first air supply pipes 8. A plurality of pneumatic diversion devices 10 are provided in the silo 1 that are spaced apart vertically. The end of each second air supply pipe 9 that is away from the first air supply pipe 8 is inserted into the silo 1 and connected to the air inlet 14 of a pneumatic diversion device 10.

[0027] A first electromagnetic regulating valve 39 is provided at the connection between the first air supply pipe 8 and the distribution pipe 7. The first electromagnetic regulating valve 39 is connected to the controller and is used to regulate the exhaust airflow intensity of all pneumatic diversion devices 10.

[0028] like Figure 3 As shown, the pneumatic diversion device 10 includes a vertically arranged mounting pipe 13, an air inlet 14 is arranged on the mounting pipe 13, the lower end of the mounting pipe 13 is closed, and a mounting plate 15 is fixedly sleeved at the upper end of the mounting pipe 13. A hemispherical cover 16 is fixedly arranged on the top of the mounting plate 15. The internal space enclosed by the hemispherical cover 16 and the mounting plate 15 is connected to the upper end of the mounting pipe 13. The hemispherical cover 16 is provided with a number of concentric and radially distributed air holes 17. The hemispherical cover 16 is coaxially arranged with the silo 1.

[0029] To prevent material from clogging the vents 17 and affecting the flow diversion effect, in this embodiment, the pneumatic flow diversion device 10 further includes a flow guide mesh 20 that is spaced around the outside of the hemispherical cover 16. The flow guide mesh 20 has a spherical structure and is concentrically arranged with the hemispherical cover 16. The hemispherical cover 16 is fixedly connected to the mounting pipe 13 via a connecting frame, and the aperture of the hemispherical cover 16 is smaller than the particle size of the material. Specifically, in this embodiment, the connecting frame includes a pipe clamp 18 that can be detachably mounted on the mounting pipe 13 by bolts, and a first connecting rod 19 that connects the pipe clamp 18 and the hemispherical cover 16.

[0030] In order to accelerate the flow rate of material pushed towards the inner wall area of ​​silo 1 by the pneumatic diversion device 10, such as Figure 1 As shown in Figure 2, the bottom of the distribution pipe 7 is provided with a plurality of second air supply pipes 11 that are spaced apart along its circumference and extend downward therefrom. The inner wall of the silo 1 is provided with a plurality of pneumatic acceleration devices 12 that are spaced apart vertically. Each pneumatic acceleration device 12 is located between two vertically adjacent pneumatic diversion devices 10.

[0031] A second electromagnetic regulating valve 40 is provided at the connection between the second air supply pipe 11 and the distribution pipe 7. The second electromagnetic regulating valve 40 is connected to the controller and is used to regulate the exhaust airflow intensity of all pneumatic acceleration devices 12.

[0032] The pneumatic acceleration device 12 includes a guide plate 21 fixed on the inner wall of the silo 1. The guide plate 21 has a ring structure with its ends connected in the horizontal plane. The vertical cross section of the guide plate 21 is a right trapezoidal structure with a smaller top and a larger bottom. The inclined surface of the guide plate 21 is located on the side away from the inner wall of the silo 1. The bottom plate of the guide plate 21 is provided with a perforated plate 22 that is open at both the top and bottom. The internal space enclosed by the guide plate 21 and the inner wall of the silo 1 is provided with a plurality of air blowing pipes 23 that are equidistantly arranged along its circumference. One end of the air blowing pipe 23 passes through the hollow interlayer 3 and is connected to the second air supply pipe 11. The other end of the air blowing pipe 23 extends to the top of the perforated plate 22.

[0033] like Figure 1 As shown, the air inlet of the fan 5 is connected to one end of the air inlet pipe 24, and the other end of the air inlet pipe 24 extends downward and is connected to the dust filter device.

[0034] like Figure 4 As shown, the dust filtration device includes a dust collection tank 27 with an open top. The bottom of the dust collection tank 27 is connected to a detachable bottom cover 28 by a thread. The upper port of the dust collection tank 27 can be detached at the lower port of the air inlet pipe 24. A vertically arranged second connecting rod 31 is fixed inside the dust collection tank 27. The upper end of the second connecting rod 31 passes through the air inlet pipe 24. A dust filter screen 32 is fixed on the second connecting rod 31. The inner and outer diameters of the dust filter screen 32 are equal to the inner diameter of the air inlet pipe 24. The dust filter screen 32 is slidably disposed inside the air inlet pipe 24.

[0035] The upper end of the air inlet pipe 24 is connected to the upper end of the inclined pipe 25. The upper end of the inclined pipe 25 is located between the dust filter screen 32 and the dust collection tank 27, and the lower end of the inclined pipe 25 extends to the discharge port 2.

[0036] like Figure 5 As shown, the top of the second connecting rod 31 is provided with a rotatable cleaning mechanism, which is used to clean the dust filter screen 32.

[0037] like Figure 5As shown, the cleaning mechanism includes a vertically arranged rotating shaft 33, the lower end of which is rotatably connected to the top of the second connecting rod 31. A fan blade 34 is fixedly mounted on the rotating shaft 33, and the fan blade 34 can rotate as the airflow in the air intake pipe 24 passes through. A limiting ring 35 is fixedly sleeved on the rotating shaft 33, and a spring 36 is sleeved on the rotating shaft 33. The upper end of the spring 36 abuts against the bottom of the limiting ring 35. A movable ring 37 is sleeved on the rotating shaft (33) and is splinedly connected to it and can move up and down. The spline connection between the rotating shaft 33 and the movable ring 37 is used to limit the rotation of the movable ring 37. The movable ring 37 abuts against the lower end of the spring 36. A brush 38 is fixedly mounted on the movable ring 37. The brush 38 is located below the fan blade 34, and the bristles of the brush 38 are in contact with the top of the dust filter screen 32.

[0038] Working principle: (1) Pneumatic diversion: When the material falls in the silo 1, the controller controls the fan 5, the first electromagnetic regulating valve 39 and the second electromagnetic regulating valve 40 to open, so as to supply air to the pneumatic diversion device 10 and the pneumatic acceleration device 12. When the high-speed airflow is discharged at high speed from the air hole 17 on the hemispherical cover 16 of the pneumatic diversion device 10, it is first dispersed by the guide net cover 20, which reduces the concentration of the airflow, expands the blowing area, blows the material above the guide net cover 20 towards the inner wall of the silo 1, and reduces the flow velocity of the material in the central area.

[0039] At the same time, after the high-speed airflow is discharged from the air blowing pipe 23 of the pneumatic acceleration device 12, it is first dispersed by the mesh plate 22, which reduces the concentration of airflow, expands the blowing area, and accelerates the flow rate of the material near the inner wall area of ​​the silo 1, so that the flow rate of the material in the outer area is consistent with the flow rate of the material in the central area, thereby achieving the purpose of "overall flow" of the material.

[0040] During operation, the opening degree of the first electromagnetic regulating valve 39 and the second electromagnetic regulating valve 40, as well as the working power of the blower 5, can be adjusted by the controller to regulate the exhaust airflow intensity of the pneumatic diversion device 10 and the pneumatic acceleration device 12 respectively, so as to meet the diversion requirements of materials with different particle sizes.

[0041] (2) Dust suppression: When the fan 5 draws air through the inlet pipe 24 and the inclined pipe 25, the lower end of the inclined pipe 25 is located near the outlet 2, so that the dust raised when the material is discharged from the outlet 2 can also be drawn into the inlet pipe 24 by the inclined pipe 25. Then it is filtered by the dust filter screen 32 in the inlet pipe 24. The airflow entering the inlet pipe 24 drives the fan blade 34 to rotate, which in turn drives the brush 38 to rotate, sweeping off the dust adhering to the dust filter screen 32 and preventing it from clogging the mesh of the dust filter screen 32. The dust collection tank 27 is used to collect dust. In the later maintenance, the dust inside the dust collection tank 27 can be quickly discharged by removing the bottom cover of the dust collection tank 27.

[0042] (3) Preventing heat accumulation in the material inside the silo 1 during winter: The fan 5 sends cold air from the outside into the material through the pneumatic diversion device 10 and the pneumatic acceleration device 12, which can prevent heat accumulation in the material inside the silo 1.

[0043] Example 2: A silo diversion device. The difference between this example and Example 1 is that the limiting ring 35, spring 36, and movable ring 37 are no longer provided, and the brush 38 is directly fixed on the rotating shaft 33. The other structures are the same as in Example 1.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A silo diversion device, characterized in that: Includes a silo (1), the lower end of which is a conical cylinder structure with a gradually decreasing diameter downwards, and the bottom of the silo (1) is provided with a discharge port (2) for internal and external communication. The silo (1) has a hollow interlayer (3) extending vertically and connected horizontally inside its side wall. The silo (1) has a plurality of ventilation holes (6) spaced around its circumference and connected to the hollow interlayer (3). Multiple fans (5) are installed on the outer wall of the silo (1). The fans (5) are connected to the controller. The air outlet of each fan (5) is connected to the end of the ventilation hole (6) away from the hollow interlayer (3). The hollow interlayer (3) is fixedly provided with a distribution pipe (7) that is coaxial with the silo (1) and has a circumferential structure, and the interior of the distribution pipe (7) is connected to all the ventilation holes (6); The bottom of the distribution pipe (7) is provided with a plurality of first air supply pipes (8) spaced along its circumference and extending downward therefrom. A second air supply pipe (9) is connected to the first air supply pipe (8). The end of the second air supply pipe (9) away from the first air supply pipe (8) is inserted into the silo (1) and connected to the air inlet (14) of the pneumatic diversion device (10). The pneumatic diversion device (10) includes a vertically arranged mounting pipe (13), an air inlet (14) is arranged on the mounting pipe (13), the lower end of the mounting pipe (13) is closed, and a mounting plate (15) is fixedly sleeved at the upper end of the mounting pipe (13). A hemispherical cover (16) is fixedly arranged on the top of the mounting plate (15). The internal space enclosed by the hemispherical cover (16) and the mounting plate (15) is connected to the upper end of the mounting pipe (13). The hemispherical cover (16) is provided with a number of concentric and radially distributed air holes (17). The hemispherical cover (16) is coaxially arranged with the silo (1).

2. The silo diversion device as described in claim 1, characterized in that: The pneumatic diversion device (10) also includes a flow guide net (20) that is spaced around the outside of the hemispherical cover (16). The flow guide net (20) is a spherical structure and is concentrically arranged with the hemispherical cover (16). The hemispherical cover (16) is fixedly connected to the mounting pipe (13) through a connecting frame. The aperture of the hemispherical cover (16) is smaller than the particle size of the material.

3. A silo diversion device as described in claim 1 or 2, characterized in that: The silo (1) is equipped with multiple pneumatic diversion devices (10) arranged at intervals between the upper and lower parts.

4. The silo diversion device as described in claim 3, characterized in that: A first electromagnetic regulating valve (39) is provided at the connection between the first air supply pipe (8) and the distribution pipe (7). The first electromagnetic regulating valve (39) is connected to the controller and is used to regulate the exhaust airflow intensity of all pneumatic diversion devices (10).

5. A silo diversion device as described in claim 1, characterized in that: The bottom of the distribution pipe (7) is provided with multiple second air supply pipes (11) that are spaced apart along its circumference and extend downward therefrom, and the inner wall of the silo (1) is provided with a pneumatic acceleration device (12). The pneumatic acceleration device (12) includes a guide plate (21) fixed on the inner wall of the silo (1). The guide plate (21) has a ring structure with the ends connected in the horizontal plane. The vertical cross section of the guide plate (21) is a right trapezoidal structure with a smaller top and a larger bottom. The inclined surface of the guide plate (21) is located on the side away from the inner wall of the silo (1). The bottom plate of the guide plate (21) is provided with a perforated plate (22) that is open at both the top and bottom. The internal space enclosed by the guide plate (21) and the inner wall of the silo (1) is provided with multiple air blowing pipes (23) that are equidistantly spaced along its circumference. One end of the air blowing pipe (23) is inserted into the hollow interlayer (3) and connected to the second air supply pipe (11). The other end of the air blowing pipe (23) extends to the top of the mesh plate (22).

6. A silo diversion device as described in claim 5, characterized in that: The inner wall of the silo (1) is provided with multiple pneumatic acceleration devices (12) arranged at intervals.

7. A silo diversion device as described in claim 5 or 6, characterized in that: A second electromagnetic regulating valve (40) is provided at the connection between the second air supply pipe (11) and the distribution pipe (7). The second electromagnetic regulating valve (40) is connected to the controller and is used to regulate the exhaust airflow intensity of all pneumatic acceleration devices (12).

8. A silo diversion device as described in claim 1, characterized in that: The air inlet of the fan (5) is connected to one end of the air inlet pipe (24), and the other end of the air inlet pipe (24) extends downward and is connected to the dust filter device; The dust filtration device includes a dust collection tank (27) with an open top. The upper port of the dust collection tank (27) can be detached at the lower port of the air inlet pipe (24). A vertically arranged second connecting rod (31) is fixed inside the dust collection tank (27). The upper end of the second connecting rod (31) passes into the air inlet pipe (24). A dust filter screen (32) is fixed on the second connecting rod (31). The inner and outer diameters of the dust filter screen (32) are equal to the inner diameter of the air inlet pipe (24). The dust filter screen (32) is slidably disposed inside the air inlet pipe (24). The upper end of the air inlet pipe (24) is connected to the upper end of the inclined pipe (25). The upper end of the inclined pipe (25) is located between the dust filter screen (32) and the dust collection tank (27). The lower end of the inclined pipe (25) extends to the discharge port (2).

9. A silo diversion device as described in claim 8, characterized in that: The top of the second connecting rod (31) is provided with a rotatable cleaning mechanism, which is used to clean the dust filter screen (32). The cleaning mechanism includes a vertically arranged rotating shaft (33), the lower end of which is rotatably connected to the top of the second connecting rod (31). A fan blade (34) is fixedly mounted on the rotating shaft (33), and the fan blade (34) can rotate as the airflow passes through the air intake pipe (24). A brush (38) is mounted on the rotating shaft (33), and the brush (38) is located below the fan blade (34), with the bristles of the brush (38) contacting the top of the dust filter screen (32).

10. A silo diversion device as described in claim 9, characterized in that: A limiting ring (35) is fixedly sleeved on the rotating shaft (33), and a spring (36) is sleeved on the rotating shaft (33). The upper end of the spring (36) abuts against the bottom of the limiting ring (35). A movable ring (37) is sleeved on the rotating shaft (33) and connected to it by splines and can move up and down. The spline connection between the rotating shaft (33) and the movable ring (37) is used to limit the rotation of the movable ring (37). The movable ring (37) abuts against the lower end of the spring (36), and the brush (38) is fixed on the movable ring (37).

Images