Dust removal type grain drying and conveying device

Abstract

The invention relates to a dust removal type grain drying and conveying device, a bucket conveyor and a drying mechanism. The drying mechanism comprises a gas inlet assembly, a second backflow assembly and gas treatment equipment, and the gas inlet assembly is used for conveying drying gas into all hoppers during conveying operation of the bucket conveyor; the second backflow assemblies correspond to openings of the hoppers and receive gas scattered from the inlets of the hoppers, the gas treatment equipment is used for receiving the gas in the second backflow assemblies, treating the gas and then conveying the gas to the conveying pipe for dust removal operation, integrated conveying, drying and dust removal operation is achieved, and the first backflow assemblies are matched for action; and a part of gas subjected to heat exchange can be conveyed to the bottom of the second backflow assembly to form airflow with the lower right portion facing upwards, so that the gas with moisture is more effectively sucked into the second backflow assembly, the overall quality of stored grains is greatly improved, and the follow-up granary maintenance burden is relieved.

Description

Technical Field

[0001] This invention relates to the field of grain transportation technology, specifically to a dust-removing grain drying and conveying device. Background Technology

[0002] Grain storage is the process of storing and managing grain from harvest to consumption. The core objective is to maintain quality and reduce losses. Its safety is mainly affected by factors such as moisture, temperature, microorganisms, pests, and gas composition. In existing technologies, grain is transported from low to high to the grain silo using belt conveyors or bucket conveyors. Then, high-temperature gas is introduced into the grain silo for drying to control the moisture content of the stored grain. However, due to the large size of the grain silos and the large amount of grain piled up, more high-temperature gas is required, and the drying efficiency is relatively low. Furthermore, the existing conveying devices only transport and transfer grain. During transportation, if the grain contains a lot of moisture and dust, it will increase the burden on the subsequent grain silos. Therefore, there is an urgent need for a dust-removing grain drying and conveying device to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a dust-removing grain drying and conveying device.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a dust-removing grain drying and conveying device, comprising a bucket conveyor and a drying mechanism, wherein the drying mechanism comprises: An air intake assembly is dynamically connected to one end of each hopper in the bucket conveyor and is always in communication with the inside of each hopper during the conveying operation. The air intake assembly is configured to deliver drying gas into the inside of each hopper during the conveying operation of the bucket conveyor. The second return assembly is installed inside the bucket conveyor and corresponds to the opening of each bucket to receive the gas emitted from the bucket inlet. The bucket conveyor has at least one vertically downward-facing conveying pipe at its top output end; an air inlet is provided on one side of the conveying pipe, and an air outlet with a filter screen is vertically positioned on the opposite side; and The top of the bucket conveyor is equipped with a gas processing device, which is configured to receive the gas in the second return assembly, process it, and then pressurize and deliver it to the air inlet.

[0005] Preferably, the air intake assembly includes an air intake channel that covers at least all hoppers; a follower plate is correspondingly arranged on the air intake channel along the movement path of the hoppers, the follower plate is configured to move synchronously with each hopper, and a guide structure is provided on the follower plate at the position corresponding to each hopper, one end of the guide structure is connected to the follower plate and communicates with the interior of the air intake channel, and the other end is connected to the flow and communicates with the interior of the hopper; gas enters the corresponding hopper along the air intake channel through each guide structure.

[0006] Preferably, the second reflux assembly includes a second reflux channel that at least covers the opening areas of all hoppers. The side of the second reflux channel facing the hopper openings has a plurality of reflux ports for collecting gas emitted through the hopper openings into the second reflux channel; and The second return channel is equipped with an upward airflow to guide the gas entering from the return port to flow upward in a unified manner.

[0007] Preferably, the second return channel is provided with downwardly inclined baffles at each return port.

[0008] Preferably, it also includes a first return component, which is dynamically connected to the other end of each bucket in the bucket conveyor and is always in communication with the inside of each bucket during the conveying operation. The air intake component is configured to receive a portion of the gas directly output from the corresponding connection end during the conveying operation of the bucket conveyor. The first reflux assembly includes a first reflux channel, which is disposed opposite to the air inlet channel. The structure of the first reflux channel is the same as that of the air inlet channel, both including a follower plate and a guide structure. Some of the gas in the hopper enters the first reflux channel through the guide structure.

[0009] Preferably, the bottom of the first reflux assembly is connected to the bottom of the second reflux assembly, the first reflux assembly is configured to receive gas and guide the gas from the bottom into the second reflux assembly, and the top of the second reflux assembly is connected to a gas processing device.

[0010] Preferably, the hopper is equipped with an air duct structure, the air duct structure comprising: A vertical plate is installed at the bottom of the hopper, perpendicular to the plane of the hopper opening; A pair of wing plates are movably mounted on the end of the upright plate facing the opening. A spherical airflow channel is provided on the vertical plate near the two wing plates. The two ends of the airflow channel are respectively connected to the airflow structure of the air intake assembly and the first return flow assembly. Air outlets are provided on both wing plate surfaces of the airflow channel. Furthermore, when the two wing plates swing toward the bottom of the hopper, they come into contact with the convex surface of the guide channel, so that both wing plates directly form a preset angle with the vertical plate; The airflow enters the guide channel through the guide structure of the air intake component. Part of the gas enters the hopper through the air outlet, while the other part continues to flow along the guide channel after heat exchange and enters the first return component through the guide structure at the other end.

[0011] More preferably, an arc-shaped counterweight is installed on the side of the two wing plates away from the vertical plate and facing the hopper opening. The arc-shaped counterweight is adjusted so that when the hopper opening tends to face downward, the two wing plates swing towards the hopper opening direction by gravity, or when the hopper opening tends to face upward, the two wing plates swing towards the bottom of the hopper by gravity.

[0012] Preferably, a plurality of arc-shaped plates are alternately arranged from top to bottom inside the conveying pipe. The arc-shaped plates are arranged perpendicular to the plane of the air inlet. A spring plate is provided on the arc-shaped plate facing the top output end of the bucket conveyor. The spring plate and the arc-shaped plate are connected by an elastic element. The spring plate is configured to reciprocate on the arc-shaped plate after contacting the falling grain and to give the grain a rebound force.

[0013] More preferably, the arc-shaped plate is provided with a plurality of elastic plates distributed in a distributed manner, and each elastic plate is independently connected to the arc-shaped plate through an elastic element.

[0014] Beneficial Effects: This invention uses a bucket conveyor as a grain transport device to gradually transport grain to a higher position. A drying mechanism is incorporated, and the air intake component allows for simultaneous hot air delivery into each hopper during grain transport, enabling independent grain drying in each hopper. A second reflux component collects humidified gas and transports it to a gas processing device for treatment before transferring it to the conveying pipe for dust removal. This achieves integrated transport, drying, and dust removal. In conjunction with the first reflux component, a portion of the heat-exchanged gas is transported to the bottom of the second reflux component, forming a downward-facing airflow that more effectively attracts humidified gas into the second reflux component. Furthermore, after unloading from the hoppers, some airflow cleans the empty hoppers, allowing residual grain to fall to the bottom or dust to enter the second reflux component for further processing. In this invention, an air duct structure is set inside the hopper, which can form a triangular structure during the transport of grain, so that at least a part of the area below the wing plate forms a cavity. Hot air enters into the cavity, and the hot air in the cavity can be evenly distributed to the grain piled up in the hopper, so as to fully contact the grain and improve the drying efficiency. During unloading, the oscillating deformation can avoid affecting the unloading of the grain. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the dust-removing grain drying and conveying device of the present invention; Figure 2 This is a schematic diagram of the structure of the hopper and air intake assembly of the present invention; Figure 3 This is a schematic diagram of the gas flow structure of the air intake assembly, hopper, and first reflux assembly of the present invention; Figure 4This is a schematic diagram of the structure of the hopper and the second reflux assembly of the present invention; Figure 5 This is a schematic diagram of the intake assembly and airflow guiding structure of the present invention; Figure 6 This is a schematic diagram of the air duct structure inside the hopper of the present invention; Figure 7 This is a schematic diagram of the specific structure within the air duct structure of the present invention; Figure 8 This is a schematic diagram of gas flow within the duct structure of the present invention; Figure 9 This is a schematic diagram of the structure of the second recirculation assembly of the present invention; Figure 10 This is a schematic diagram of the material conveying pipe of the present invention; Figure 11 This is a detailed structural diagram of the material conveying pipe and the arc-shaped plate of the present invention; The following are the labeling elements in the diagram: 11. Shell; 12. Feed inlet; 13. Conveyor chain; 14. Hopper; 141. Hole; 15. Drive unit; 16. Discharge outlet; 21. Air inlet channel; 22. Groove; 23. Follower plate; 241. First hollow block; 242. Guide tube; 243. Second hollow block; 31. Vertical plate; 32. Wing plate; 33. Flow guide channel; 34. Air outlet; 35. Arc-shaped counterweight; 41. Second return channel; 42. Return port; 43. Baffle; 44. Manifold; 51. First return channel; 61. Conveying pipe; 62. Air inlet; 63. Air outlet; 64. Arc-shaped plate; 65. Spring plate; 7. Gas treatment equipment; 8. Guide side plate. Detailed Implementation

[0016] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe a dust-removing grain drying and conveying device or several specific embodiments of this invention, and does not strictly limit the scope of protection specifically claimed by this invention.

[0017] The technical solution adopted in this invention is as follows: Figures 1-4 As shown, a dust-removing grain drying and conveying device includes a bucket conveyor and a drying mechanism. refer to Figure 1 and Figure 2As shown, the bucket conveyor includes a vertically arranged shell 11 with a feed inlet 12 at the bottom. A conveyor belt / chain 13 is installed inside the shell 11. Taking the conveyor chain 13 as an example, multiple buckets 14 are installed on the conveyor chain 13. The conveyor belt / chain 13 is driven by a drive device 15, which controls the hoppers 14 to circulate and transport grain from bottom to top. After storing grain at the feed inlet 12, the hoppers 14 are transported to the top, then flipped to discharge the grain from the top outlet 16. The transport process of the bucket conveyor is similar to the working principle of a conventional bucket conveyor. (Refer to...) Figure 2 As shown, guide side plates 8 are installed on both sides below the hopper 14. When the hopper 14 is transported to the top and flipped, a channel can be formed by the guide side plates 8 and the main body of the hopper 14 to guide the grain toward the discharge port 16, so that the grain can be released stably toward the discharge port 16. In this invention, a drying mechanism is installed inside the bucket conveyor. The drying mechanism mainly consists of an air inlet assembly, a first reflux assembly, a second reflux assembly, and a gas processing device 7. Its function is to take hot air generated by an external burner or hot air furnace, and during the conveying process in the hoppers 14, transport it through the air inlet assembly to each hopper 14. A portion of the hot air undergoes heat exchange and enters the first reflux assembly, while the remaining hot air enters the interior of each hopper 14, simultaneously drying the grain inside each hopper 14 during the conveying process. The dried air then exits from the opening of the hopper 14 and is received by the second reflux assembly. The first reflux assembly and the second reflux assembly... The gas received by the equipment enters the gas treatment equipment 7. The gas treatment equipment 7 mainly performs filtration and dehumidification operations. Conventional filtration and dehumidification equipment can be used. At least one vertically downward conveying pipe 61 is set at the top output end of the bucket conveyor. An air inlet 62 is opened on one side of the conveying pipe 61, and an air outlet 63 with a filter screen is vertically set on the opposite side. After completing the filtration and dehumidification operations, the airflow is pressurized to increase the flow rate and then conveyed to the air inlet 62. The accelerated airflow is sprayed into the conveying pipe 61. Since the conveying pipe 61 is set vertically downward, the grain falls vertically, and the dust and other impurities remaining in the grain are removed by side blowing.

[0018] In this embodiment, the air intake assembly is dynamically connected to one end of each hopper 14 inside the bucket conveyor and remains in constant communication with the interior of each hopper 14 during the conveying operation. The air intake assembly is configured to supply drying gas into the interior of each hopper 14 during the conveying operation of the bucket conveyor. Specifically: refer to Figures 2-3 and Figure 5 As shown, the air intake assembly includes an air intake channel 21, which covers at least all hoppers 14. (Refer to...) Figure 5As shown, a first side plate is provided on one side of the entire conveyor chain 13. The first side plate has a hollow structure, forming an air intake channel 21. The hollow structure inside the first side plate can be independently set according to the different states and positions of the hoppers to control the airflow at different positions. For example, a large hollow structure is set at the position where the hopper 14 is rising to transport grain, and a small hollow structure is set at the position where the hopper 14 is falling, so that the main airflow can enter the rising hopper 14, and some airflow enters the falling hopper. A slot 22 is provided on the side of the first side plate along the moving path of the hopper 14. The slot 22 is connected to the inner... The hollow structure is connected, and a follower plate 23 is slidably installed in the slot 22. The follower plate 23 is configured to move synchronously with each hopper 14. The follower plate 23 and the slot 22 are directly sealed to ensure that the airflow does not leak from the slot 22 and the follower plate 23 during the rotation and movement of the follower plate 23. A guide structure is provided on the follower plate 23 at the corresponding position of each hopper 14. One end of the guide structure is connected to the follower plate 23 and communicates with the inside of the air inlet channel 21, and the other end is connected to the flow and communicates with the inside of the hopper 14. The gas enters the corresponding hopper 14 through the air inlet channel 21 and the guide structure.

[0019] In one specific embodiment, reference is made to Figure 5 As shown, the flow guiding structure includes a first hollow block 241, a conduit 242, and a second hollow block 243. The first hollow block 241 is installed between the conveyor chain 13 and the follower plate 23, and the interior of the first hollow block 241 is connected to the hollow structure inside the first side plate. The second hollow block 243 is installed between the conveyor chain 13 and one end of the hopper 14. A hole 141 is provided at the end of the hopper 14, and the interior of the second hollow block 243 is connected to the hole 141. The conduit 242 is arranged around the conveyor chain 13 to connect the first hollow block 241 and the second hollow block 243. (See reference...) Figure 5 The layout is designed to not affect the normal operation of the conveyor chain 13. Hot air enters the air inlet channel 21, that is, the hollow structure of the first side plate. Hollow structures can be set according to the moving path of the hopper 14, so that hot air can enter each first hollow block 241 more effectively. Then, it enters the hopper 14 in sequence through the conduit 242, the second hollow block 243, and the hole 141. The entire follower plate 23 moves synchronously with all the hoppers 14, that is, the first hollow block 241, the conduit 242, the second hollow block 243 and the follower plate 23 remain relatively stationary.

[0020] by Figure 2 For example, according to the hot air entering the hopper 14 through the guide structure in the direction of the reference arrow in the air inlet channel 21, the temperature of the hot air is higher than the temperature of the grain, causing the moisture in the grain to evaporate. Then, according to the arrow in the hopper 14, the hot air is discharged out of the opening of the hopper 14 to realize the grain drying operation. In one embodiment, reference Figures 6-8As shown, an air duct structure is installed inside the hopper 14. The air duct structure includes a vertical plate 31, a pair of wing plates 32, and a spherical guide channel 33. The vertical plate 31 is set perpendicular to the opening plane of the hopper 14 at the bottom of the hopper 14. The pair of wing plates 32 are respectively movably installed on the end of the vertical plate 31 facing the opening. The spherical guide channel 33 is set in the area of ​​the vertical plate 31 near the two wing plates 32 and connects to the air intake assembly. Air outlets 34 are provided on the surface of the guide channel 33 facing the two wing plates 32. When the two wing plates 32 swing towards the bottom of the hopper 14, they contact the convex surface of the guide channel 33, so that the two wing plates 32 directly form a preset angle with the vertical plate 31. When transporting grain, Figure 8 For example, the wing plate 32 and the vertical plate 31 form a preset angle, so that at least a part of the area below the wing plate 32 forms a cavity. Hot air enters the guide channel 33 through the hole 141, and then enters the cavity through the air outlet 34 on the guide channel 33 in the direction of the arrow. The hot air in the cavity can be evenly distributed to the grain piled in the hopper 14, which can fully contact the grain and improve the drying efficiency. When transported to the top of the bucket conveyor, during the unloading process of the hopper 14, under the push of gravity and the grain at the bottom, the two wing plates 32 can swing around the movable installation towards the opening of the hopper 14. Through this swinging operation, the grain in the hopper 14 can be completely discharged, avoiding the impact on the unloading of the grain. This achieves both full drying and effective unloading. When the next round of loading operation is carried out, the two wing plates 32 can automatically swing downward and reset under the action of gravity.

[0021] Furthermore, in this embodiment, an arc-shaped counterweight 35 is installed on the side of the two wing plates 32 away from the vertical plate 31 and facing the opening of the hopper 14. The arc-shaped counterweight 35 is weighted so that when the opening of the hopper 14 tends to be downward, the two wing plates 32 swing towards the opening of the hopper 14 with the assistance of gravity, or when the opening of the hopper 14 tends to be upward, the two wing plates 32 swing towards the bottom of the hopper 14 with the assistance of gravity.

[0022] In this embodiment, the second return assembly is installed inside the bucket conveyor and corresponds to the opening of each bucket 14, receiving the gas emitted from the inlet of the bucket 14; Reference Figure 4 and Figure 9 As shown, the second reflux assembly includes a second reflux channel 41, which at least covers the opening areas of all hoppers 14. The side of the second reflux channel 41 facing the opening of the hopper 14 is provided with a plurality of reflux ports 42. The reflux ports 42 are used to collect the gas emitted through the opening of the hopper 14 into the second reflux channel 41. The second reflux channel 41 is also provided with an upward airflow to guide the gas entering from the reflux ports 42 to flow upward in a unified manner. Further, refer to Figure 9As shown, downward-sloping baffles 43 are provided at each return port 42 in the second return channel 41. Based on the above, since the second return channel 41 is configured with an upward airflow, a certain negative pressure will be generated, thereby attracting the airflow with moisture from the opening of the hopper 14 to enter the second return channel 41 through the return port 42. A flow collector hood 44 can be installed at the top of the bucket conveyor. The flow collector hood 44 is connected to the top second return channel 41 and is used to collect the gas that is not collected in the bottom second return channel 41. The downward-sloping baffles 43 can prevent grain that accidentally falls during transportation from entering the return port 42. A filter structure can also be installed at the return port 42 to further ensure that grain does not enter the second return channel 41.

[0023] In one embodiment, by setting a first reflux component, a portion of the gas can be refluxed and introduced into the second reflux channel 41. The refluxed gas is used as an upward airflow to guide the humid airflow that is emitted from the opening of the hopper 14 into the second reflux channel 41. The first return assembly is dynamically connected to the other end of each bucket 14 within the bucket conveyor and remains in constant communication with the interior of each bucket 14 during conveying operations. The air intake assembly is configured to receive a portion of the gas directly output from the corresponding connection end during bucket conveying operations. (Refer to...) Figure 3 As shown, the first recirculation assembly includes a first recirculation channel 51, which is disposed opposite to the intake channel 21, so as to... Figure 3 For example, the left side is the air intake channel 21, and the right side is the first return channel 51. The gas flows in the direction of the arrow, and the structure of the first return channel 51 is the same as that of the air intake channel 21, both including a follower plate 23 and a guide structure. Some of the gas in the hopper 14 enters the first return channel 51 through the guide structure. In this embodiment, the bottom of the first return component is connected to the bottom of the second return component, that is, the bottom of the first return channel 51 is connected to the bottom of the second return channel 41. One end of the air duct structure is connected to the air intake component through the guide structure, and the other end is connected to the first return channel 51 through the guide structure. (Refer to...) Figure 3 As shown, hot air enters the air duct structure inside the hopper 14 from the air inlet channel 21 along the first hollow block 241, the conduit 242, and the second hollow block 243. Part of the air enters the interior of the hopper 14, while the other part continues to enter the second return channel 41 along the guide channel 33. The second return channel 41 is the second side plate and the hollow structure inside the second side plate. The top of the hollow structure inside the second side plate is closed, and the bottom opening is connected to the bottom of the second return channel 41. The hollow structure inside the second side plate can be set as a narrow structure to increase the flow velocity, so that the airflow flows downward quickly and flows into the bottom of the second return channel 41, and then flows upward in the second return channel 41.

[0024] In one embodiment, reference Figures 10-11 As shown, several arc-shaped plates 64 are alternately arranged from top to bottom inside the conveying pipe 61. The arc-shaped plates 64 are arranged perpendicular to the plane of the air inlet 62. A spring plate 65 is provided on the arc-shaped plates 64 facing the top output end of the bucket conveyor. The spring plate 65 and the arc-shaped plates 64 are connected by an elastic element. The spring plate 65 is configured to reciprocate on the arc-shaped plates 64 after contacting the falling grain, and to give the grain a rebound force. In this embodiment, the dried grain is released from the top of the bucket conveyor into the discharge port 16, then enters the conveying pipe 61 through the discharge port 16, and falls freely down through the conveying pipe 61. Figure 1 and Figure 10 As shown, the first arc-shaped plate 64 located inside the conveying pipe 61 is positioned on the opposite side of the discharge port 16. The grain released from the discharge port 16 first contacts the spring plate 65 of the first arc-shaped plate 64 under inertia. Then, the grain is bounced up to a certain height and falls onto the second arc-shaped plate 64 below. This repeated falling increases the residence time of the grain in the conveying pipe 61 and also disperses the output grain, exposing the dust and impurities in the grain. The processed and pressurized return gas is input through an air inlet 62 on one side of the conveying pipe 61. The plane of the air inlet 62 is perpendicular to the plane of the arc-shaped plate 64. The input return gas blows and disperses the dust in the grain into the vertical air outlet 63 with a filter screen on the opposite side of the conveying pipe 61, thus achieving dust removal.

[0025] In this embodiment, it can be further configured such that: multiple elastic plates 65 are distributed on the arc-shaped plate 64, and each elastic plate 65 can be connected to each other by elastic connecting strips, so that when each elastic plate 65 vibrates independently, there is always no gap between the two elastic plates 65. Each elastic plate 65 is independently connected to the arc-shaped plate 64 through an elastic element. The distributed elastic plates 65 can lift up the grain falling at different times in layers, more effectively disperse the grain, and improve the subsequent dust removal effect.

[0026] The embodiments of the present invention have been described in detail above with reference to the examples. However, the present invention is not limited to the above embodiments. For those skilled in the art, after learning the contents described in the present invention, several equivalent changes and substitutions can be made without departing from the principle of the present invention. These equivalent changes and substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A dust-removing grain drying and conveying device, characterized in that: It includes a bucket conveyor and a drying mechanism, wherein the drying mechanism includes: An air intake assembly is dynamically connected to one end of each hopper in the bucket conveyor and is always in communication with the inside of each hopper during the conveying operation. The air intake assembly is configured to deliver drying gas into the inside of each hopper during the conveying operation of the bucket conveyor. The second return assembly is installed inside the bucket conveyor and corresponds to the opening of each bucket to receive the gas emitted from the bucket inlet. The bucket conveyor has at least one vertically downward-facing conveying pipe at its top output end; an air inlet is provided on one side of the conveying pipe, and an air outlet with a filter screen is vertically positioned on the opposite side; and The top of the bucket conveyor is equipped with a gas processing device, which is configured to receive the gas in the second return assembly, process it, and then pressurize and deliver it to the air inlet.

2. The dust-removing grain drying and conveying device according to claim 1, characterized in that: The air intake assembly includes an air intake channel that covers at least all hoppers. A follower plate is correspondingly arranged along the hopper's movement path on the air intake channel. The follower plate is configured to move synchronously with each hopper in a cyclical manner. A flow guide structure is provided on the follower plate at a position corresponding to each hopper. One end of the flow guide structure is connected to the follower plate and communicates with the interior of the air intake channel, while the other end is connected to the flow path and communicates with the interior of the hopper. Gas enters the corresponding hopper along the air intake channel through each flow guide structure.

3. The dust-removing grain drying and conveying device according to claim 1, characterized in that: The second reflux assembly includes a second reflux channel that covers at least the opening areas of all hoppers. The side of the second reflux channel facing the hopper openings has a plurality of reflux ports for collecting gas emitted through the hopper openings into the second reflux channel. The second return channel is equipped with an upward airflow to guide the gas entering from the return port to flow upward in a unified manner.

4. The dust-removing grain drying and conveying device according to claim 3, characterized in that: The second return channel is equipped with downward-sloping baffles at each return port.

5. A dust-removing grain drying and conveying device according to claim 2, characterized in that: It also includes a first return component, which is dynamically connected to the other end of each bucket in the bucket conveyor and is always in communication with the inside of each bucket during the conveying operation. The air intake component is configured to receive a portion of the gas directly output from the corresponding connection end during the conveying operation of the bucket conveyor. The first reflux assembly includes a first reflux channel, which is disposed opposite to the air inlet channel. The structure of the first reflux channel is the same as that of the air inlet channel, both including a follower plate and a guide structure. Some of the gas in the hopper enters the first reflux channel through the guide structure.

6. A dust-removing grain drying and conveying device according to any one of claims 1-5, characterized in that: The bottom of the first reflux component is connected to the bottom of the second reflux component. The first reflux component is configured to receive gas and guide the gas from the bottom into the second reflux component. The top of the second reflux component is connected to a gas processing device.

7. A dust-removing grain drying and conveying device according to claim 3, characterized in that: The hopper is equipped with an air duct structure, which includes: A vertical plate is installed at the bottom of the hopper, perpendicular to the plane of the hopper opening; A pair of wing plates are movably mounted on the end of the upright plate facing the opening. A spherical airflow channel is provided on the vertical plate near the two wing plates. The two ends of the airflow channel are respectively connected to the airflow structure of the air intake assembly and the first return flow assembly. Air outlets are provided on both wing plate surfaces of the airflow channel. Furthermore, when the two wing plates swing toward the bottom of the hopper, they come into contact with the convex surface of the guide channel, so that both wing plates directly form a preset angle with the vertical plate; The airflow enters the guide channel through the guide structure of the air intake component. Part of the gas enters the hopper through the air outlet, while the other part continues to flow along the guide channel after heat exchange and enters the first return component through the guide structure at the other end.

8. A dust-removing grain drying and conveying device according to claim 7, characterized in that: Two wing plates are mounted with an arc-shaped counterweight on the side facing the hopper opening away from the vertical plate. The arc-shaped counterweight is adjusted so that when the hopper opening tends to face downwards, the two wing plates swing towards the hopper opening through gravity assistance, or when the hopper opening tends to face upwards, the two wing plates swing towards the bottom of the hopper through gravity assistance.

9. A dust-removing grain drying and conveying device according to claim 1, characterized in that: Several arc-shaped plates are alternately arranged from top to bottom inside the conveying pipe. The arc-shaped plates are arranged perpendicular to the plane of the air inlet. A spring plate is provided on the arc-shaped plates facing the top output end of the bucket conveyor. The spring plate and the arc-shaped plates are connected by an elastic element. The spring plate is configured to reciprocate on the arc-shaped plates after contacting the falling grain, and to give the grain a rebound force.

10. A dust-removing grain drying and conveying device according to claim 9, characterized in that: Multiple elastic plates are distributed on the arc-shaped plate, and each elastic plate is independently connected to the arc-shaped plate through an elastic element.

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