An airflow drying device for millet production

Abstract

The present invention belongs to the field of airflow screening technology, and specifically provides an airflow drying device for millet production, comprising a screen box, a blowing assembly, a uniform blanking assembly, a first conveyor belt and a drying assembly. A first blanking channel and a second blanking channel are formed inside the screen box, and an air inlet is provided on the side wall of the first blanking channel. The blowing assembly blows air into the screen box through the air inlet. The uniform blanking assembly is used to uniformly scatter millet material into the first blanking channel, and lighter impurities will be blown to the top of the second blanking channel by the airflow, and fall along the second blanking channel and be discharged through the second discharge port. The heavier millet material continues to fall along the first blanking channel, falls to the first conveyor belt below through the first discharge port, and is transported to a designated position by the first conveyor belt. The present invention achieves uniform blanking of millet material through the uniform blanking assembly, which helps to ensure screening quality, and reduces the number of subsequent repeated screenings, saving time and workload, and improving screening efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of airflow screening devices, and particularly relates to an airflow drying device for millet production. Background Art

[0002] After millet is harvested from the fields, it needs to be screened to remove the straw, stones, husks, etc. contained in it to obtain qualified products. Common screening equipment includes vibrating screens and airflow screens. These two screening devices each have their own characteristics and applicable scenarios, and are usually used in combination. Specifically, first use a vibrating screen to perform a coarse screening to remove impurities with a particle size that is significantly different from that of the millet grains, and then use an airflow screen for fine screening to remove impurities that are larger or smaller than the millet mass, and finally obtain a relatively pure millet product.

[0003] When the airflow screen is working, the millet needs to be lifted to a high place, and a blower or other blowing equipment is used to blow air on the side of the millet's falling path. Under the action of the wind, the millet and other impurities will fall to different positions, thus achieving the screening of the millet. There are two main factors that determine the screening effect of the airflow screen. The first is the uniformity of the wind force, and the second is the uniformity of the spread of the millet when it falls. Among them, the first factor mentioned above is relatively easy to control. The wind force can be made uniform by selecting a blower with a relatively stable wind speed, but the second factor is more difficult to control. Since the existing technology uses manual lifting, conveyor transportation and other methods to drop millet, the millet cannot be spread evenly, resulting in poor screening effect. It is often necessary to repeat the screening multiple times to screen out impurities. Summary of the Invention

[0004] The present invention provides an airflow drying device for millet production, aiming to solve the problem in the prior art that when millet is screened by air to remove impurities, millet cannot be evenly scattered, resulting in poor screening effect and often requiring repeated screening to screen out impurities.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide an airflow drying device for millet production, comprising:

[0006] A screen box having a blanking cavity therein, wherein a vertical first partition is provided in the blanking cavity, the first partition dividing the blanking cavity into a first blanking channel and a second blanking channel, the upper portions of the first blanking channel and the second blanking channel being connected to each other and passing through the top of the screen box to form a feed port, the bottom of the first blanking channel passing through the bottom of the screen box to form a first discharge port, the bottom of the second blanking channel passing through the bottom of the screen box to form a second discharge port, and the first blanking channel having an air inlet on a side away from the second blanking channel;

[0007] an air blowing assembly, provided on one side of the screen box, for blowing air toward the air inlet;

[0008] A uniform material dropping assembly comprises a bracket, a material box and a first driving member, wherein the bracket is arranged on the top of the screen box, the material box has a material holding chamber, the cross section of the material holding chamber is fan-shaped, the central axis of the material holding chamber extends in the horizontal direction and is perpendicular to the air outlet direction of the blowing assembly, and the first driving member is used to drive the material box to rotate around the central axis of the material holding chamber;

[0009] a first conveyor belt disposed below the screen box, wherein a loading end of the first conveyor belt is located below the first discharge port, and a unloading end of the first conveyor belt extends in a direction away from the screen box; and

[0010] The drying component is arranged above the first conveyor belt and has a heating surface facing the first conveyor belt.

[0011] In a possible implementation, the inner wall of the first blanking channel is further provided with a magnetic suction plate, and the magnetic suction plate is provided on the inner wall of the first blanking channel on a side away from the second blanking channel.

[0012] In a possible implementation, the air inlet is in an elongated strip shape, and the length direction of the air inlet is parallel to the extension direction of the central axis of the material holding chamber;

[0013] The blowing assembly includes a plurality of first fans, which are arranged at intervals at the air inlet along the length direction of the air inlet.

[0014] In a possible implementation, the air inlet is arranged with its opening direction in the first blanking channel tilted upward.

[0015] In a possible implementation, the millet production airflow drying device further includes a loading conveyor, which is used to transport millet materials into the material box.

[0016] In one possible implementation, the loading conveyor is a screw conveyor, which is inclined in the up and down directions. The lower end of the screw conveyor has a loading hopper, and the top end of the screw conveyor is provided with a downward-facing drop port, which is located above the material box.

[0017] In a possible implementation, the bracket is slidably mounted on the screen box, and the sliding direction of the bracket is parallel to the spacing direction between the first material drop channel and the second material drop channel; two material boxes are provided, and the two material boxes are spaced apart along the sliding direction of the bracket, and two first driving members are provided corresponding to the material boxes;

[0018] The blowing assembly further includes a translation drive mechanism, which is provided on the screen box and is used to drive the bracket to slide so that the two material boxes are alternately located above the first blanking channel.

[0019] In a possible implementation, the uniform blanking assembly further includes a material guiding mechanism, and the material guiding mechanism includes:

[0020] A material guide plate is provided below the material drop opening and is rotatably coupled to the bracket, wherein the rotation axis of the material guide plate is parallel to the central axis of the material box;

[0021] Two telescopic plates are respectively arranged at both ends of the material guide plate;

[0022] Two telescopic rods, respectively provided on the lower surface of the guide plate and connected to the two telescopic plates in a one-to-one correspondence, the telescopic rods being used to drive the corresponding telescopic plates to extend or retract from the ends of the guide plate; and

[0023] The second driving member is provided on the bracket and is used for driving the guide plate to rotate.

[0024] In a possible implementation, the uniform material dropping assembly also includes two material mixing mechanisms, and the two material mixing mechanisms correspond one to one to the two material boxes. The material mixing mechanisms are arranged below the corresponding material boxes, and the material mixing mechanisms have a vibrating end that can move up and down, and the vibrating end abuts against the material box. The vibrating end is used to drive the corresponding material box to vibrate up and down when the screw conveyor transports the millet material into the material box.

[0025] In one possible implementation, a second partition is further provided in the screen box, the second partition is provided in the first blanking channel, the second partition is parallel to the first partition, and an air blowing pipe is provided on the second partition toward the second partition, the air inlet end of the air blowing pipe is connected to a second fan, and the second fan is provided in the screen box.

[0026] Compared with the prior art, the beneficial effects of the airflow drying device for millet production provided by the present invention are:

[0027] The present invention provides an airflow drying device for millet production, comprising a screen box, a blowing assembly, a uniform dropping assembly, a first conveyor belt, and a drying assembly. A first dropping channel and a second dropping channel are formed inside the screen box. An air inlet is provided on the side wall of the first dropping channel, and the blowing assembly blows air into the screen box through the air inlet. The uniform dropping assembly is used to uniformly drop millet material into the first dropping channel. As the millet material falls along the first dropping channel, lighter impurities (such as husks, dust, etc.) are blown by the airflow to the top of the second dropping channel, fall along the second dropping channel, and are discharged through the second discharge port. The heavier millet material continues to fall along the first dropping channel, falls through the first discharge port onto the first conveyor belt below, and is transported to a designated location by the first conveyor belt. A drying assembly is provided above the first conveyor belt, which can dry the screened millet and prevent it from deteriorating during storage due to moisture.

[0028] The uniform blanking assembly in the present invention includes a bracket, a material box and a first driving member. The material box has a material holding cavity for storing millet material. Since the radial cross-section of the material holding cavity is fan-shaped, and the rotation axis of the material box is the center of the fan-shaped circle. The side of the material box adjacent to its own rotation axis is the discharge side. When the material box flips over to dump the material, it only needs to control the uniform rotation of the material box through the first driving member, so that the millet material can be poured into the feed port at a uniform speed and in a uniform amount. A thinner blanking layer can be formed during the blanking process, so that the airflow blown out from the air inlet can more efficiently separate the millet and impurities. The present invention achieves uniform blanking of millet material through the uniform blanking assembly, which helps to ensure the quality of screening, thereby reducing the number of subsequent repeated screenings, saving time and workload, and improving screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0032] Figure 1 A three-dimensional schematic diagram of an airflow drying device for millet production provided in an embodiment of the present application;

[0033] Figure 2 A front view of an airflow drying device for millet production provided in an embodiment of the present application;

[0034] Figure 3 for Figure 2 Cross-sectional view in the AA direction;

[0035] Figure 4 This is a three-dimensional schematic diagram of the embodiment of the present application after omitting the screw conveyor;

[0036] Figure 5 This is a three-dimensional schematic diagram of a uniform blanking assembly in an embodiment of the present application;

[0037] Figure 6 This is an internal cross-sectional view of the uniform blanking assembly in an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 10. Screen box; 11. Feed port; 12. First partition; 13. First blanking channel; 14. Second blanking channel; 15. Air inlet; 16. Magnetic suction plate; 17. Second partition; 18. Air blow pipe; 19. Air outlet; 20. Blowing assembly; 21. First fan; 22. Second fan; 30. Uniform blanking assembly; 31. Bracket; 32. Material box; 33. First driving member; 34. Translational driving mechanism; 35. Material guiding mechanism; 351. Material guiding plate; 352. Telescopic plate; 353. Telescopic rod; 36. Material leveling mechanism; 361. Vibrating end; 40. First conveyor belt; 50. Drying assembly; 60. Screw conveyor; 61. Upper hopper; 62. Blanking port; 70. Second conveyor belt. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0042] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures. These relative terms include, for example, "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "rear," and the like. Such spatially relative terms are intended to encompass different orientations of the device during use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, changes position, or changes motion, these directional indications will change accordingly. For example, an element described as "below" or "beneath" another element or feature would subsequently be oriented "above" or "above" the other element or feature. Thus, the example term "below" can encompass both above and below orientations. The device may be oriented differently (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0043] Please also refer to Figures 1 to 6 , the following describes an airflow drying device for millet production provided in an embodiment of the present application.

[0044] To address the technical problem in the prior art of airflow screening devices that prevent millet from being evenly distributed during airflow screening and impurity removal, resulting in poor screening results and often requiring repeated screening to remove impurities, the present application provides an airflow drying device for millet production, which can achieve uniform distribution of millet materials, allowing for better separation of millet and impurities under the action of airflow, thereby improving screening results and efficiency. Furthermore, the screened millet can be thermally dried to prevent deterioration of the millet during subsequent storage due to moisture.

[0045] For details, please refer to Figures 1 to 3 An embodiment of the present invention provides an airflow drying device for millet production, comprising a screen box 10, a blowing assembly 20, a uniform blanking assembly 30, a first conveyor belt 40 and a drying assembly 50.

[0046] The screen box 10 has a blanking cavity inside, and a vertical first partition 12 is provided in the blanking cavity. The first partition 12 divides the blanking cavity into a first blanking channel 13 and a second blanking channel 14. The upper parts of the first blanking channel 13 and the second blanking channel 14 are connected to each other and pass through the top of the screen box 10 to form a feed port 11. The bottom of the first blanking channel 13 passes through the bottom of the screen box 10 to form a first discharge port, and the bottom of the second blanking channel 14 passes through the bottom of the screen box 10 to form a second discharge port. The first blanking channel 13 is provided with an air inlet 15 on the side away from the second blanking channel 14; the blowing component 20 is provided on one side of the screen box 10 for blowing air to the air inlet 15; the uniform speed blanking component 3 0 includes a bracket 31, a material box 32 and a first driving member 33. The bracket 31 is arranged at the top of the screen box 10. The material box 32 has a material holding chamber. The cross-section of the material holding chamber is fan-shaped. The central axis of the material holding chamber extends in the horizontal direction and is perpendicular to the air outlet direction of the blowing assembly 20. The first driving member 33 is used to drive the material box 32 to rotate around the central axis of the material holding chamber; the first conveyor belt 40 is arranged below the screen box 10, the feeding end of the first conveyor belt 40 is located below the first discharge port, and the unloading end of the first conveyor belt 40 extends in a direction away from the screen box 10; the drying assembly 50 is arranged above the first conveyor belt 40 and has a heating surface facing the first conveyor belt 40.

[0047] Compared with the prior art, the beneficial effects of the airflow drying device for millet production provided by the embodiment of the present invention are:

[0048] An embodiment of the present invention provides an airflow drying device for millet production, comprising a screen box 10, a blowing assembly 20, a uniform dropping assembly 30, a first conveyor belt 40, and a drying assembly 50. The screen box 10 is internally formed with a first dropping channel 13 and a second dropping channel 14. The sidewall of the first dropping channel 13 is provided with an air inlet 15, through which the blowing assembly 20 blows air into the screen box 10. The uniform dropping assembly 30 is used to uniformly drop millet material into the first dropping channel 13. As the millet material falls along the first dropping channel 13, lighter material (such as husks and dust) is blown by the airflow to the top of the second dropping channel 14, where it falls down along the second dropping channel 14 and is discharged through the second discharge port. Heavier millet material continues to fall along the first dropping channel 13, dropping through the first discharge port onto the first conveyor belt 40 below, where it is transported to a desired location. A drying assembly 50 is provided above the first conveyor belt 40 , which can dry the sieved millet and prevent the millet from deteriorating during subsequent storage due to moisture.

[0049] The uniform blanking assembly 30 of the present invention includes a bracket 31, a material box 32, and a first drive member 33. The material box 32 has a material holding chamber for storing millet material. Since the radial cross-section of the material holding chamber is fan-shaped, and the rotation axis of the material box 32 is the center of the fan-shaped circle. The side of the material box 32 adjacent to its own rotation axis is the discharge side. When the material box 32 flips over to dump the material, it only needs to control the uniform rotation of the material box 32 through the first drive member 33 to make the millet material be poured into the feed port 11 at a uniform speed and in a uniform amount. A thin blanking layer can be formed during the blanking process, so that the airflow blown out from the air inlet 15 can more efficiently separate the millet from impurities. The present invention achieves uniform blanking of the millet material through the uniform blanking assembly 30, which helps to ensure the screening quality, thereby reducing the number of subsequent repeated screenings, saving time and workload, and improving screening efficiency.

[0050] The screen box 10 can be a metal shell structure with a hollow interior forming a feeding cavity. A first partition 12 is disposed within the feeding cavity to separate the first feeding channel 13 from the second feeding channel 14. As the millet material falls, air is blown out from the air inlet 15, causing the millet to fall from the first feeding channel 13 onto the first conveyor belt 40, while impurities fall from the second feeding channel 14 onto the second conveyor belt 70, thereby separating the millet from the impurities. Common impurities include husks, straw residue, and dust. The screen box 10 is provided with an air outlet 19 on the side facing away from the air inlet 15. The air outlet 19 can be connected to a dust collector to prevent dust. Common dust collectors include bag dust collectors and cyclone dust collectors.

[0051] The blowing component 20 is arranged at the position of the air inlet 15. The blowing component 20 can adopt an existing blower without limitation to its specific specifications and models, as long as it can generate airflow with appropriate wind speed as needed.

[0052] The uniform feeding assembly 30 includes a bracket 31, a hopper 32, and a first drive member 33. Bracket 31 is mounted on top of the screen box 10. The hopper 32 is shaped like an inverted quarter cylinder and has a fan-shaped material-holding chamber with an open top for loading millet. Before operation, the millet material to be screened is fed into the hopper 32 via a loading conveyor, filling it completely.

[0053] The rotation axis of the material box 32 is located at its own central axis. The first drive member 33 can be a mechanical device capable of outputting rotational motion, such as a motor. The first drive member 33 drives the material box 32 to rotate at a constant speed through gear transmission, belt transmission, or other means. The material holding chamber of the material box 32 has a fan-shaped cross-section, and the discharge side of the material box 32 is located on the side of the material box 32 adjacent to the rotation axis. The length of the discharge side of the material box 32 is the same as the axial length of the material holding chamber. As the material box 32 rotates and dumps the millet material at a constant speed, the amount of millet material dumped is maintained constant, thereby achieving uniform speed and quantity of material discharge. During the discharge process, a relatively thin layer of material is formed, facilitating the airflow to separate the millet from impurities.

[0054] The first conveyor belt 40 and the second conveyor belt 70 are used to transport millet and impurities respectively. A drying assembly 50 is provided above the first conveyor belt 40, which uses electric heating pipes to provide heat to dry the millet during transportation to ensure that the millet is dry.

[0055] See also Figure 3 In some possible embodiments, the inner wall of the first drop channel 13 is further provided with a magnetic suction plate 16. The magnetic suction plate 16 is disposed on the inner wall of the first drop channel 13 on the side away from the second drop channel 14. The magnetic suction plate 16 is used to absorb iron impurities that may be contained in the millet during its falling process. The magnetic suction plate 16 can be a permanent magnet, an electromagnet, etc. The magnetic suction plate 16 is detachable, making it easy to remove and clean the impurities it has absorbed.

[0056] See also Figure 1 、 Figure 3 and Figure 4 In some possible embodiments, the air inlet 15 is in an elongated shape, and the length direction of the air inlet 15 is parallel to the extension direction of the central axis of the material holding chamber; the blowing assembly 20 includes a plurality of first fans 21, and the plurality of first fans 21 are arranged at intervals along the length direction of the air inlet 15 at the air inlet 15.

[0057] In this embodiment, multiple first fans 21 are of the same model and specifications. These fans are arranged along the length of the air inlet 15, making them suitable for applications where the axial length of the cartridge 32 is relatively long. This allows for uniform airflow. To further improve airflow uniformity, a flow equalizer can be installed at the air inlet 15. The flow equalizer consists of multiple parallel grille bars with adjustable inclination angles to guide the airflow.

[0058] See also Figure 3 and Figure 4In some possible embodiments, the air inlet 15 is arranged to open upward in the first blanking channel 13, for example, at an angle of 45° or 60° relative to the horizontal plane. This arrangement can form an upward oblique airflow, which helps to blow impurities farther away and more thoroughly separate the impurities from the millet.

[0059] See also Figure 1 and Figure 2 In some possible embodiments, a millet production airflow drying device further includes a feeding conveyor, which is used to feed millet materials into the material box 32. The feeding conveyor can be a common belt conveyor, a screw conveyor 60, etc.

[0060] See also Figure 1 and Figure 2 In some possible embodiments, the feeding conveyor is a screw conveyor 60, which is tilted in the vertical direction. The lower end of the screw conveyor 60 has an upper hopper 61, and the top of the screw conveyor 60 has a downward-facing discharge port 62, which is located above the material box 32. The millet material to be screened is fed into the upper hopper 61 at the lower end, discharged from the discharge port 62 at the top end, and enters the material box 32.

[0061] See also Figure 1 、 Figure 4 、 Figure 5 and Figure 6 In some possible embodiments, the bracket 31 is slidably arranged on the screen box 10, and the sliding direction of the bracket 31 is parallel to the spacing direction of the first blanking channel 13 and the second blanking channel 14; there are two material boxes 32, and the two material boxes 32 are spaced apart along the sliding direction of the bracket 31, and two first driving members 33 and two material boxes 32 are correspondingly arranged; the blowing assembly 20 also includes a translation drive mechanism 34, which is arranged on the screen box 10, for driving the bracket 31 to slide so that the two material boxes 32 are alternately located above the first blanking channel 13.

[0062] In this embodiment, two material boxes 32 are mounted on a support 31. While one of the material boxes 32 is being unloaded, the other can be loaded. This reduces downtime and improves efficiency. A translational drive mechanism 34 and the support 31 drive the two material boxes 32 alternately between the unloading and loading positions. The translational drive mechanism 34 can be a telescopic electric rod, a telescopic hydraulic cylinder, or the like.

[0063] See also Figures 3 to 6In some possible embodiments, the uniform blanking assembly 30 further includes a material guide mechanism 35, which includes a material guide plate 351, two telescopic plates 352, two telescopic rods 353, and a second drive member. The material guide plate 351 is disposed below the blanking port 62 and rotatably engages with the bracket 31. The rotation axis of the material guide plate 351 is parallel to the central axis of the material box 32. The two telescopic plates 352 are disposed at both ends of the material guide plate 351. The two telescopic rods 353 are disposed on the lower surface of the material guide plate 351 and are connected to the two telescopic plates 352 in a one-to-one manner. The telescopic rods 353 are used to drive the corresponding telescopic plates 352 to extend or retract from the ends of the material guide plate 351. The second drive member is disposed on the bracket 31 and is used to drive the material guide plate 351 to rotate.

[0064] The function of the material guide mechanism 35 in this embodiment is to guide the material conveyed from the screw conveyor 60 to the corresponding material box 32 through the inclined material guide plate 351. In order to take into account the feeding of the two material boxes 32, the material guide mechanism 35 inevitably needs to be designed to be longer. Since the material guide plate 351 needs to be flipped during operation, in order to avoid interference with other structures during the flipping process of the material guide plate 351, a telescopic rod 353 and a telescopic plate 352 are provided at both ends of the material guide plate 351 to extend the end of the material guide plate 351. The second driving member can be a motor, which drives the material guide plate 351 to rotate through gear transmission, belt transmission, etc., and guides the millet material into the corresponding material box 32.

[0065] See also Figures 3 to 6 In some possible embodiments, the uniform material dropping assembly 30 further includes two material shaving mechanisms 36 , which correspond one to one with the two material boxes 32 . The material shaving mechanisms 36 are arranged below the corresponding material boxes 32 . The material shaving mechanisms 36 have a vibrating end 361 that can move up and down, and the vibrating end 361 abuts against the material box 32 .

[0066] The vibrating end 361 is used to drive the corresponding material box 32 to vibrate up and down when the screw conveyor 60 conveys the millet material into the material box 32. The material distribution mechanism 36 can be a vibration motor, a telescopic electric rod that can be extended and retracted, etc. Its function is to evenly distribute the millet material in the material box 32 by applying an up and down vibration force to the material box 32. This arrangement can more evenly distribute the millet material when pouring it into the feed port 11, helping to ensure a uniform speed and uniform amount of material.

[0067] See also Figure 3In some possible embodiments, a second partition 17 is further provided in the screen box 10. The second partition 17 is provided in the first blanking channel 13. The second partition 17 is parallel to the first partition 12. The second partition 17 is provided with an air blowing pipe 18 facing the second partition 17. The air blowing pipe 18 can be installed on the second partition 17 by bolting, welding, etc. The air inlet end of the air blowing pipe 18 is connected to a second fan 22. The second fan 22 is provided in the screen box 10. By blowing air through the second fan 22 and the air blowing pipe 18, impurities with a weight close to that of millet can be blown into the second blanking channel 14, so that the impurities can be separated more thoroughly.

[0068] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0069] Obviously, those skilled in the art may make various modifications and variations to this application without departing from the spirit and scope of this application. Thus, as long as these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

[0070] The above description is a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An airflow drying device for millet production, characterized in that: include: A screen box (10) has a blanking cavity inside, wherein a vertical first partition (12) is provided in the blanking cavity, the first partition (12) divides the blanking cavity into a first blanking channel (13) and a second blanking channel (14), the upper parts of the first blanking channel (13) and the second blanking channel (14) are connected to each other and pass through the top of the screen box (10) to form a feed port (11), the bottom of the first blanking channel (13) passes through the bottom of the screen box (10) to form a first discharge port, the bottom of the second blanking channel (14) passes through the bottom of the screen box (10) to form a second discharge port, and the first blanking channel (13) is provided with an air inlet (15) on a side away from the second blanking channel (14); an air blowing assembly (20), provided on one side of the screen box (10), for blowing air toward the air inlet (15); A uniform material dropping assembly (30) comprises a bracket (31), a material box (32), a first driving member (33) and a translation driving mechanism (34), wherein the bracket (31) is arranged on the top of the screen box (10), the material box (32) has a material holding cavity, the cross section of the material holding cavity is fan-shaped, the central axis of the material holding cavity extends in the horizontal direction and is perpendicular to the air outlet direction of the blowing assembly (20), the first driving member (33) is used to drive the material box (32) to rotate around the central axis of the material holding cavity, and the bracket (31) is slidably arranged on the screen box (10). The screen box (10) is provided with two material boxes (32), the sliding direction of the bracket (31) is parallel to the spacing direction of the first blanking channel (13) and the second blanking channel (14); the two material boxes (32) are arranged at intervals along the sliding direction of the bracket (31); the first driving members (33) and the material boxes (32) are provided with two corresponding to each other; the translation driving mechanism (34) is provided on the screen box (10) and is used to drive the bracket (31) to slide so that the two material boxes (32) are alternately located above the first blanking channel (13); a first conveyor belt (40) disposed below the screen box (10), wherein a loading end of the first conveyor belt (40) is located below the first discharge port, and a unloading end of the first conveyor belt (40) extends in a direction away from the screen box (10); as well as The drying assembly (50) is arranged above the first conveyor belt (40) and has a heating surface facing the first conveyor belt (40).

2. The airflow drying device for millet production according to claim 1, characterized in that: The inner wall of the first blanking channel (13) is further provided with a magnetic suction plate (16), and the magnetic suction plate (16) is provided on the inner wall of the first blanking channel (13) on the side away from the second blanking channel (14).

3. The airflow drying device for millet production according to claim 1, characterized in that: The air inlet (15) is in an elongated strip shape, and the length direction of the air inlet (15) is parallel to the extension direction of the central axis of the material holding chamber; The blowing assembly (20) comprises a plurality of first fans (21), and the plurality of first fans (21) are arranged at intervals at the air inlet (15) along the length direction of the air inlet (15).

4. The airflow drying device for millet production according to claim 1, characterized in that: The opening direction of the air inlet (15) is arranged to be inclined upward.

5. The airflow drying device for millet production according to claim 1, characterized in that: The millet production airflow drying device further comprises a feeding conveyor, and the feeding conveyor is used to transport the millet material into the material box (32).

6. The airflow drying device for millet production according to claim 5, characterized in that: The loading conveyor is a screw conveyor (60), which is arranged to be inclined in the up and down directions. The lower end of the screw conveyor (60) is provided with a loading hopper (61), and the top end of the screw conveyor (60) is provided with a downward-facing drop opening (62), and the drop opening (62) is located above the material box (32).

7. The airflow drying device for millet production according to claim 6, characterized in that: The uniform speed blanking assembly (30) further comprises a material guiding mechanism (35), wherein the material guiding mechanism (35) comprises: A material guide plate (351) is provided below the material drop opening (62) and is rotatably coupled to the bracket (31), wherein the rotation axis of the material guide plate (351) is parallel to the central axis of the material box (32); Two telescopic plates (352) are respectively arranged at both ends of the material guide plate (351); Two telescopic rods (353) are respectively provided on the lower surface of the guide plate (351) and are connected to the two telescopic plates (352) in a one-to-one correspondence. The telescopic rods (353) are used to drive the corresponding telescopic plates (352) to extend or retract from the ends of the guide plate (351); and The second driving member is provided on the bracket (31) and is used for driving the guide plate (351) to rotate.

8. The airflow drying device for millet production according to claim 6, characterized in that: The uniform speed material dropping assembly (30) further comprises two material sparging mechanisms (36), the two material sparging mechanisms (36) corresponding to the two material boxes (32) one by one, the material sparging mechanisms (36) being arranged below the corresponding material boxes (32), the material sparging mechanisms (36) having a vibrating end (361) movable up and down, the vibrating end (361) being in contact with the material box (32), and the vibrating end (361) being used to drive the corresponding material box (32) to vibrate up and down when the screw conveyor (60) conveys the millet material into the material box (32).

9. The airflow drying device for millet production according to claim 1, characterized in that: A second partition (17) is further provided in the screen box (10), and the second partition (17) is provided in the first blanking channel (13). The second partition (17) is parallel to the first partition (12), and an air blowing pipe (18) facing the second partition (17) is provided on the second partition (17). The air inlet end of the air blowing pipe (18) is connected to a second fan (22), and the second fan (22) is provided in the screen box (10).

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