Circulating impeller grain drying apparatus and method

Abstract

This invention discloses a circulating, rotary grain drying device and method, relating to the field of grain drying equipment. The device and method include a housing with two rotatably connected shafts. A conveyor belt is wound between the shafts. A first heating plate and a second heating plate are fixedly connected to the housing. The device also includes three first hot air blowers: one fixed to the lower rear of the housing, another fixed to the upper front, and the last fixed to the lower front. A support frame is fixed to the housing, and a second hot air blower is fixed to the support frame. This invention uses the second hot air blowers to expel the dried grain from the housing, while undried grain is re-pulled onto the conveyor belt by the first hot air blowers, thus achieving a circulating conveyor system within the housing and ensuring thorough drying.

Description

Technical Field

[0001] This invention relates to the field of grain drying equipment, and more particularly to a circulating rotary grain drying equipment and drying method. Background Technology

[0002] Grains need to be dehumidified and dried before storage. The purpose of this is to reduce the moisture content of the grains, thereby reducing the energy consumed by the grains' respiration and preventing them from sprouting and becoming moldy. Grain drying equipment is required to dry the grains.

[0003] Current grain drying equipment requires grain to be fed into the dryer, where it is dried by circulating hot air to evaporate the moisture. However, because the grain is stacked inside the dryer during drying, the grain at the center of the stack is not easily affected by the hot air, resulting in poor drying. This grain is then discharged from the dryer later, meaning the harvested grain is not fully dried. To address this issue, a circulating rotary grain drying device and method are being developed. Summary of the Invention

[0004] To overcome the shortcomings of current grain dryers in that they are difficult to dry grains thoroughly, this invention provides a circulating rotary grain drying device and drying method.

[0005] Technical solution: A circulating toggle-type grain drying equipment includes an outer shell, a cover plate inserted into the outer shell, a servo motor fixedly connected to the outer shell, two connecting shafts rotatably connected to the outer shell, one of which is fixedly connected to the servo motor, a conveyor belt wound between the connecting shafts, multiple equally spaced paddles fixedly connected to the conveyor belt, a first heating plate fixedly connected to the outer shell, a second heating plate fixedly connected to the outer shell, and three first hot air blowers, one of which is fixedly connected to the lower rear side of the outer shell, another to the upper front part of the outer shell, and the last to the lower front part of the outer shell. A support frame is fixedly connected to the outer shell, and a second hot air blower is fixedly connected to the support frame.

[0006] In a preferred embodiment of the present invention, the paddle is made of a soft material.

[0007] In a preferred embodiment of the present invention, the circulating toggle grain drying device further includes a progressive mechanism disposed in the outer shell. The progressive mechanism includes a plurality of flexible guide plates, which are rotatably connected to the inside of the outer shell. The flexible guide plates are divided into two rows and are staggered left and right. A swing component is disposed on the flexible guide plate, which is used to drive the flexible guide plate to swing.

[0008] In a preferred embodiment of the present invention, the swing assembly includes a cam, which is symmetrically fixed to the left and right sides of one of the connecting shafts. The outer shell is fixed with symmetrically distributed guide blocks, and a contact rod is slidably connected to the guide block. The contact rod is pressed and engaged with the adjacent cam. The flexible guide plate is fixed with symmetrically distributed contact wheels, which are pressed and engaged with the adjacent contact rod. A first torsion spring is wound between the contact wheel and the outer shell.

[0009] In a preferred embodiment of the present invention, the circulating toggle grain drying equipment further includes an adjustment mechanism. The adjustment mechanism is disposed on the outer shell and includes a mounting frame fixed to the outer shell. The mounting frame is fixed with symmetrically distributed guide frames. A threaded rod is rotatably connected to one of the guide frames. A handle is fixed to the threaded rod. A nut is threadedly connected to the threaded rod. A connecting frame is slidably connected to the guide frame. One of the connecting frames is fixed to the nut. A movable plate is fixed between the connecting frames. A symmetrically distributed inclined plate is fixed to the movable plate. A guide frame is fixed to the outer shell. A baffle is slidably connected to the guide frame. The baffle and the inclined plate are in a pressing fit.

[0010] In a preferred embodiment of the present invention, the circulating toggle grain drying device further includes a fixed guide plate, which is symmetrically fixed to the outer shell.

[0011] In a preferred embodiment of the present invention, the circulating toggle grain drying device further includes a stacking mechanism disposed on the outer shell. The stacking mechanism includes a fixing plate, which is symmetrically fixed inside the outer shell. A partition is rotatably connected to the fixing plate, and symmetrically distributed second torsion springs are wound between the partition and the adjacent fixing plate.

[0012] In a preferred embodiment of the present invention, the circulating agitator-type grain drying device further includes a soft brush, which is fixed to the support frame.

[0013] In a preferred embodiment of the present invention, the circulating toggle grain drying device further includes a dehumidifier, which is symmetrically fixed to the outer shell.

[0014] A circulating agitator-type grain drying method, using the aforementioned circulating agitator-type grain drying equipment, includes the following steps: S1: Place the collection box, turn on the servo motor, the first heating plate, the second heating plate, the first hot air blower and the second hot air blower, heat the inside of the outer shell through the first heating plate and the second heating plate, drive the connecting shaft, the conveyor belt and the paddle through the servo motor to open the cover and put the grain into the outer shell; S2: The grain is initially dried by the first heating plate, the grain is guided to move to the vicinity of the conveyor belt by the first hot air blower, the grain is pushed onto the conveyor belt by the paddle, and then the grain is further dried by the second heating plate; S3: The grains fall into the blowing area of ​​the second hot air blower under the conveyor belt. At this time, the dried grains will be blown out of the shell and fall into the collection box. The undried grains will fall to the bottom of the shell. The undried grains will be guided by the first hot air blower and pushed onto the conveyor belt again by the paddle for drying until the grains are fully dried and blown out of the shell. S4: Remove the collection box and grains, and turn off the servo motor, first heating plate, second heating plate, first hot air blower and second hot air blower.

[0015] Compared with the prior art, the present invention has the following advantages: This invention uses a second hot air blower to blow the dried grain out of the shell, while the undried grain is blown back onto the conveyor belt by the first hot air blower, thereby enabling the grain to be circulated and transported in the shell, ensuring that the grain is fully dried.

[0016] This invention uses a first heating plate to quickly evaporate some of the moisture in the grain, saving time, and then uses a second heating plate to further dry the grain at a suitable temperature, enabling the grain to be dried at different temperatures at different stages.

[0017] This invention uses a paddle made of a soft material to gently agitate the grains, which not only ensures that the grains are evenly distributed between each pair of paddles, facilitating drying, but also reduces the impact damage to the grains during transport.

[0018] This invention utilizes the pressing action of a cam and a contact rod to enable the contact wheel to rotate and lift the soft guide plate, thereby gently striking the grain. This action blocks the grain and prolongs its residence time in the heating section of the first heating plate, thus evaporating as much moisture as possible from the grain during the initial drying process.

[0019] This invention adjusts the position of the movable plate, thereby adjusting the size of the opening between the baffle and the movable plate, allowing grains of different sizes to pass through separately, thus enabling the screening of grains of different sizes.

[0020] This invention temporarily blocks grains from falling onto the conveyor belt by using a partition, which can prolong the time that the grains stay in the heating section of the first heating plate, and can also feed the grains in batches, avoiding the problem of too much grain on the conveyor belt affecting the drying effect. Attached Figure Description

[0021] Figure 1 This is a first-view three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a second-view three-dimensional structural diagram of the present invention.

[0023] Figure 3This is a three-dimensional structural diagram of the outer shell, the first heating plate, and the second heating plate of the present invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the outer shell, cover plate, and conveyor belt of the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the support frame and the first hot air blower of the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the support frame and the second hot air blower of the present invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the contact wheel and cam of the present invention.

[0028] Figure 8 This is a three-dimensional structural diagram of the soft guide plate and connecting shaft of the present invention.

[0029] Figure 9 This is a three-dimensional structural diagram of the soft guide plate and the first torsion spring of the present invention.

[0030] Figure 10 This is a three-dimensional structural diagram of the movable plate and fixed guide plate of the present invention.

[0031] Figure 11 This is a three-dimensional structural diagram of the baffle and guide frame of the present invention.

[0032] Figure 12 This is a three-dimensional structural diagram of the inclined plate, guide frame, and connecting frame of the present invention.

[0033] Figure 13 This is a three-dimensional structural diagram of the housing, soft guide plate, and fixing plate of the present invention.

[0034] Figure 14 This is a cross-sectional structural diagram of the fixing plate and partition plate of the present invention.

[0035] Figure 15 This is a three-dimensional structural diagram of the support frame and soft brush of the present invention.

[0036] In the diagram: 1. Outer shell, 2. Cover plate, 3. Servo motor, 301. Connecting shaft, 31. Conveyor belt, 32. Paddle, 4. First heating plate, 41. Second heating plate, 51. First hot air blower, 52. Second hot air blower, 53. Support frame, 6. Progressive mechanism, 61. Cam, 62. Contact rod, 63. Guide block, 64. Contact wheel, 65. First torsion spring, 66. Soft guide plate, 7. Adjustment mechanism, 71. Mounting frame, 711. Guide frame, 712. Fixed guide plate, 72. Baffle, 73. Moving plate, 731. Connecting frame, 74. Guide frame, 75. Threaded rod, 751. Nut, 752. Rotary handle, 76. Inclined plate, 8. Stacking mechanism, 81. Fixed plate, 82. Partition, 83. Second torsion spring, 91. Soft brush, 101. Dehumidifier. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0038] Example 1: Circulating rotary grain drying equipment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the device includes a housing 1, a cover plate 2 inserted into the upper front part of the housing 1, a servo motor 3 fixedly connected to the rear side of the upper right part of the housing 1, a connecting shaft 301 rotatably connected to both the upper rear part and the lower front part of the housing 1, and the connecting shaft 301 located at the upper rear part is fixedly connected to the output shaft of the servo motor 3, a conveyor belt 31 is wound between the two connecting shafts 301, and multiple equally spaced paddles 32 are fixedly connected to the conveyor belt 31. The paddles 32 are all made of soft material. A first heating plate 4 is fixedly connected to the front part of the housing 1, a second heating plate 41 is fixedly connected to the upper part of the housing 1, and a first hot air blower 51 is also included. There are three first hot air blowers 51. One first hot air blower 51 is fixedly connected to the lower rear part of the housing 1, another first hot air blower 51 is fixedly connected to the upper front part of the housing 1, and the last first hot air blower 51 is fixedly connected to the lower front part of the housing 1. A support frame 53 is fixedly connected to the inner rear part of the housing 1, and a second hot air blower 52 is fixedly connected to the support frame 53.

[0039] This device is used for drying grains. In use, firstly, a collection box needs to be placed at the rear of the outer casing 1. Then, the first heating plate 4, the second heating plate 41, the servo motor 3, the first hot air blower 51, and the second hot air blower 52 are turned on. The first heating plate 4 and the second heating plate 41 heat the inside of the outer casing 1, with the first heating plate 4 reaching a higher temperature than the second heating plate 41. The first hot air blower 51 and the second hot air blower 52 blow hot air. Driven by the output shaft of the servo motor 3, the connecting shaft 301 drives the conveyor belt 31 to rotate clockwise. Then, the cover plate 2 can be moved upwards by hand, causing it to detach from the outer casing 1. Grains are then fed into the upper front of the outer casing 1. Guided by the hot air blown by the first hot air blower 51 at the upper front and lower front, the grains are dried. The grains fall onto the conveyor belt 31. During this process, the first heating plate 4 heats the grains, causing them to dry initially and quickly evaporate some of the moisture adhering to them. Once on the conveyor belt 31, the grains are transported from the lower front to the upper rear of the outer casing 1 by the conveyor belt 31 and the paddles 32. Because the paddles 32 are made of a soft material, they gently agitate the grains, ensuring even distribution between each pair of paddles 32 and reducing damage from impacts during transport. As the grains move upwards on the conveyor belt 31, they undergo further slow drying under the heating of the second heating plate 41, as the heating temperature of the second heating plate 41 is lower than that of the first heating plate. Plate 4 ensures the grain is at the optimal drying temperature and prevents over-drying. When the grain reaches the highest point of conveyor belt 31, it falls off under gravity. As the moisture evaporates, the grain's weight decreases. Under the influence of hot air from the second hot air blower 52, the dried grain flies out from the upper rear of the outer shell 1 and falls into the collection box. Incompletely dried grain is not blown out of the outer shell 1 by the second hot air blower 52; it falls to the bottom inner part of the outer shell 1. Then, under the influence of the first hot air blower 51 at the lower rear, the incompletely dried grain moves forward and is then moved again on conveyor belt 31 by the lever 32, repeating the process described above. The process continues until all the grains are completely dried and blown out of the outer shell 1. Once this is complete, the collection box can be removed, and the servo motor 3, first heating plate 4, second heating plate 41, first hot air blower 51, and second hot air blower 52 can be turned off. The cover plate 2 can then be replaced with the outer shell 1. The first heating plate 4 quickly evaporates some of the moisture from the grains, saving time. The second heating plate 41 further dries the grains at a suitable temperature, allowing for different temperatures at different stages of drying. The grains are gently agitated by the soft-material paddles 32, ensuring even distribution between paddles and reducing damage from impacts during transport. Finally, the grains are blown out by the first and second hot air blowers 51.This allows the grain to circulate and be transported within the outer shell 1, ensuring that the grain is thoroughly dried.

[0040] Example 2: Based on Example 1, such as Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 and Figure 9 As shown, the circulating toggle grain drying equipment also includes a progressive mechanism 6, which is located in the outer shell 1. The progressive mechanism 6 includes four flexible guide plates 66, which are rotatably connected to the inner front of the outer shell 1. The four flexible guide plates 66 are divided into two rows, front and back, and are staggered left and right. A swing component is provided on the flexible guide plate 66, which is used to drive the flexible guide plate 66 to swing.

[0041] like Figure 7 , Figure 8 and Figure 9 As shown, the swing assembly includes two cams 61, which are fixed to the left and right sides of the connecting shaft 301 at the lower front. Guide blocks 63 are fixed to the left and right sides of the lower front of the outer casing 1. Contact rods 62 are slidably connected to the guide blocks 63. The contact rods 62 are pressed and engaged with the adjacent cams 61. Contact wheels 64 are fixed to the left and right sides of the soft guide plate 66. The contact wheels 64 are pressed and engaged with the adjacent contact rods 62. A first torsion spring 65 is wound between the contact wheel 64 and the outer casing 1.

[0042] To allow the grains to remain in the heating section of the first heating plate 4 for a longer period, the flexible guide plate 66 can be used to agitate them. When the connecting shaft 301 rotates, the cam 61 also rotates under its influence. Under the pressure of the cam 61, the contact rod 62 moves upward, and under the pressure of the contact rod 62, the contact wheels 64 rotate and lift. Under the influence of the contact wheels 64, the flexible guide plate 66 also rotates and lifts, and the first torsion spring 65 twists. Then, as the cam 61 continues to rotate, the contact rod 62 is released and falls back to its original position under the action of gravity. At the same time, the contact wheels 64 are also released. Under the action of the first torsion spring 65, the contact wheels 64 and the flexible guide plate 66 rotate in opposite directions to reset. As the cam 61 continues to rotate, the above rotation is repeated. In this way, the flexible guide plate 66 can gently tap the grains, causing them to bounce upward, thus providing some resistance and allowing the grains to remain in the heating section of the first heating plate 4 for a longer period, evaporating as much moisture as possible from the grains during the initial drying process.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 10 , Figure 11 and Figure 12 As shown, the circulating rotary grain drying equipment also includes an adjustment mechanism 7, which is mounted on the outer shell 1. The adjustment mechanism 7 includes a mounting frame 71, which is fixed to the upper rear part of the outer shell 1. Guide frames 74 are fixed to both the left and right sides of the mounting frame 71. A threaded rod 75 is rotatably connected to the guide frame 74 on the right side. A handle 752 is fixed to the rear of the threaded rod 75. A nut 751 is threadedly connected to the threaded rod 75. A connecting frame 731 is slidably connected to the guide frame 74. The connecting frame 731 on the left side is fixed to the nut 751. A movable plate 73 is fixed to the upper part of the connecting frame 731. Inclined plates 76 are fixed to both the left and right sides of the upper front part of the movable plate 73. A guide frame 711 is fixed to the upper rear part of the outer shell 1. A baffle 72 is slidably connected to the guide frame 711. The baffle 72 and the inclined plate 76 are in a pressing fit.

[0044] like Figure 10 As shown, the circulating toggle grain drying equipment also includes two fixed guide plates 712. The two fixed guide plates 712 are fixed to the left and right sides of the upper rear part of the outer casing 1, and the two fixed guide plates 712 are located on the left and right sides of the movable plate 73, respectively.

[0045] Since a batch of grain contains grains of different sizes, with larger grains having higher moisture content and greater weight, and smaller grains having lower moisture content and less weight, the grains of different sizes can be sorted by moving the movable plate 73. Initially, after the baffle 72 and movable plate 73 seal the upper outlet of the outer shell 1, the collection box needs to be placed directly on the movable plate 73. During drying, the lighter grains that have been dried need to be sorted out first. This can be done by manually turning the handle 752, which drives the threaded rod 75 to rotate. Driven by the threaded rod 75, the nut 751 moves backward, causing the connecting frame 731 and the movable plate 73 to move backward. Driven by the movable plate 73, the inclined plate 76 moves backward, pressing the baffle 72 upward. At this time, a small opening appears between the baffle 72 and the movable plate 73. Some of the smaller, lighter grains that have been dried can be discharged through this small opening and enter the collection box because they are blown to a higher height. Larger grains are not yet fully dried, so they fly at a lower altitude and are blocked by the moving plate 73, preventing them from flying out of the outer shell 1. After all the smaller grains have been collected, another collection box is replaced. Then, the handle 752 is manually turned, causing the threaded rod 75 to move the nut 751, connecting frame 731, inclined plate 76, and moving plate 73 backward. The baffle 72 moves further upward under the pressure of the inclined plate 76, thus increasing the opening between the moving plate 73 and the baffle 72. Even though the larger grains are dried, they are still heavy and fly at a lower altitude. However, due to the increased opening between the moving plate 73 and the baffle 72, the larger grains can still fly out of the outer shell 1 through the larger opening and enter the new collection box. This achieves the purpose of screening grains. The purpose of setting the fixed guide plate 712 is to prevent grains from splashing out from both sides of the moving plate 73.

[0046] like Figure 3 , Figure 13 and Figure 14 As shown, the circulating toggle grain drying equipment also includes a stacking mechanism 8, which is disposed on the outer shell 1. The stacking mechanism 8 includes two fixing plates 81. The two fixing plates 81 are symmetrically fixed to the lower inner front part of the outer shell 1. Each fixing plate 81 is rotatably connected to a partition plate 82. A second torsion spring 83 is wound between the left and right sides of the partition plate 82 and the adjacent fixing plate 81.

[0047] To further extend the time the grain stays in the heating section of the first heating plate 4, and to control the total amount of grain on the conveyor belt 31, the grain is blocked by the partition 82 after entering the outer shell 1. Since the grain on the partition 82 is relatively light in the initial state, the grain cannot push down the partition 82. As the amount of grain falling on the partition 82 increases, the weight of the grain also increases, and the grain will press down the partition 82, causing the partition 82 to rotate. The second torsion spring 83 twists, and an opening appears between the partitions 82. The grain can pass through the opening and fall onto the conveyor belt 31. Then the weight of the grain on the partition 82 is reduced. Under the action of the second torsion spring 83, the partition 82 rotates in the opposite direction to reset. In this way, the time the grain stays in the heating section of the first heating plate 4 can be extended, and the grain can be fed in batches to avoid the amount of grain on the conveyor belt 31 being too large and affecting the drying effect.

[0048] like Figure 1 and Figure 15 As shown, the circulating toggle grain drying equipment also includes a soft brush 91, which is fixed to the upper front part of the support frame 53.

[0049] When the paddle 32 moves with the conveyor belt 31 to contact the soft brush 91, the soft brush 91 can brush off the grains attached to the paddle 32, preventing the grains from sticking to the paddle 32 and being unable to be discharged from the outer casing 1.

[0050] like Figure 1 and Figure 2 As shown, the circulating rotary grain drying equipment also includes two dehumidifiers 101, which are fixed to the left and right sides of the outer casing 1 respectively.

[0051] Since the grain drying process is the process of grain moisture evaporation, the water vapor in the outer shell 1 can be discharged to the outside by turning on the dehumidifier 101, so as to avoid the moisture inside the outer shell 1 affecting the drying effect.

[0052] Example 3: Based on Examples 1 and 2, a circulating stirring grain drying method is described below: S1: Place the collection box, turn on the servo motor 3, the first heating plate 4, the second heating plate 41, the first hot air blower 51 and the second hot air blower 52, and heat the inside of the outer shell 1 through the first heating plate 4 and the second heating plate 41. Drive the connecting shaft 301, the conveyor belt 31 and the paddle 32 through the servo motor 3 to open the cover plate 2 and put the grain into the outer shell 1. S2: The grain is initially dried by the first heating plate 4, the grain is guided to move to the vicinity of the conveyor belt 31 by the first hot air blower 51, the grain is pushed onto the conveyor belt 31 by the paddle 32, and then the grain is further dried by the second heating plate 41. S3: The grains fall into the blowing area of ​​the second hot air blower 52 under the conveyor belt 31. At this time, the dried grains will be blown out of the outer shell 1 and fall into the collection box. The grains that are not fully dried will fall to the bottom of the inner shell 1. The grains that are not fully dried will be pushed onto the conveyor belt 31 again by the paddle 32 under the guidance of the first hot air blower 51 for drying until the grains are fully dried and blown out of the outer shell. S4: Remove the collection box and grains, and turn off the servo motor 3, the first heating plate 4, the second heating plate 41, the first hot air blower 51, and the second hot air blower 52.

[0053] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all variations and equivalent structures and functions.

Claims

1. A circulating rotary grain drying device, comprising a shell (1), a cover plate (2) inserted into the shell (1), a servo motor (3) fixedly connected to the shell (1), two connecting shafts (301) rotatably connected to the shell (1), one of the connecting shafts (301) being fixedly connected to the servo motor (3), a conveyor belt (31) wound between the connecting shafts (301), a plurality of equally spaced paddles (32) fixedly connected to the conveyor belt (31), a first heating plate (4) fixedly connected to the shell (1), and a second heating plate (41) also fixedly connected to the shell (1), characterized in that: It also includes a first hot air blower (51), and there are three first hot air blowers (51). One first hot air blower (51) is fixed to the lower rear side of the outer shell (1), another first hot air blower (51) is fixed to the upper front part of the outer shell (1), and the last first hot air blower (51) is fixed to the lower front part of the outer shell (1). The outer shell (1) is fixed with a support frame (53), and a second hot air blower (52) is fixed on the support frame (53). It also includes a progressive mechanism (6), which is disposed in the outer shell (1). The progressive mechanism (6) includes multiple soft guide plates (66), which are rotatably connected to the inside of the outer shell (1). The soft guide plates (66) are divided into two rows and are staggered left and right. A swing component is provided on the soft guide plate (66), which is used to drive the soft guide plate (66) to swing. The swing assembly includes a cam (61), which is symmetrically fixed to the left and right sides of one of the connecting shafts (301). The outer shell (1) is fixed with symmetrically distributed guide blocks (63). A contact rod (62) is slidably connected to the guide block (63). The contact rod (62) is pressed and engaged with the adjacent cam (61). A soft guide plate (66) is fixed with symmetrically distributed contact wheels (64). The contact wheels (64) are pressed and engaged with the adjacent contact rod (62). A first torsion spring (65) is wound between the contact wheel (64) and the outer shell (1). It also includes an adjustment mechanism (7), which is set on the outer shell (1). The adjustment mechanism (7) includes a mounting frame (71), which is fixed to the outer shell (1). The mounting frame (71) is fixed with symmetrically distributed guide frames (74). A threaded rod (75) is rotatably connected to one side of the guide frame (74). A handle (752) is fixed to the threaded rod (75). A nut (751) is threadedly connected to the threaded rod (75). A connecting frame (731) is slidably connected to the guide frame (74). One side of the connecting frame (731) is fixed to the nut (751). A movable plate (73) is fixed between the connecting frames (731). A symmetrically distributed inclined plate (76) is fixed to the movable plate (73). A guide frame (711) is fixed to the outer shell (1). A baffle (72) is slidably connected to the guide frame (711). The baffle (72) and the inclined plate (76) are both pressed together.

2. The circulating rotary grain drying device according to claim 1, characterized in that: The paddle (32) is made of a soft material.

3. The circulating rotary grain drying device according to claim 2, characterized in that: It also includes a fixed guide plate (712), which is symmetrically fixed to the outer shell (1).

4. The circulating rotary grain drying device according to claim 3, characterized in that: It also includes a stacking mechanism (8), which is disposed on the outer shell (1). The stacking mechanism (8) includes a fixing plate (81), which is symmetrically fixed inside the outer shell (1). A partition plate (82) is rotatably connected to the fixing plate (81), and a second torsion spring (83) is symmetrically distributed between the partition plate (82) and the adjacent fixing plate (81).

5. The circulating rotary grain drying device according to claim 4, characterized in that: It also includes a soft brush (91), which is fixed to the support frame (53).

6. The circulating rotary grain drying device according to claim 5, characterized in that: It also includes a dehumidifier (101), which is symmetrically fixed to the outer casing (1).

7. A circulating agitator-type grain drying method, employing the circulating agitator-type grain drying equipment as described in claim 6, characterized in that... Includes the following steps: S1: Place the collection box, turn on the servo motor (3), the first heating plate (4), the second heating plate (41), the first hot air blower (51) and the second hot air blower (52), and heat the inside of the outer shell (1) through the first heating plate (4) and the second heating plate (41). Drive the connecting shaft (301), the conveyor belt (31) and the paddle (32) through the servo motor (3) to open the cover plate (2) and put the grain into the outer shell (1); S2: The grain is initially dried by the first heating plate (4), and the grain is guided to move to the vicinity of the conveyor belt (31) by the first hot air blower (51) at the upper front and lower front. The grain is then pushed onto the conveyor belt (31) by the paddle (32), and further dried by the second heating plate (41). S3: The grains fall into the blowing area of ​​the second hot air blower (52) under the conveyor belt (31). At this time, the dried grains will be blown out of the shell (1) and fall into the collection box. The grains that are not dried will fall to the bottom of the shell (1). The grains that are not dried will be guided by the first hot air blower (51) on the rear lower side and then pushed onto the conveyor belt (31) again by the paddle (32) for drying until the grains are fully dried and blown out of the shell. S4: Remove the collection box and grains, and turn off the servo motor (3), the first heating plate (4), the second heating plate (41), the first hot air blower (51), and the second hot air blower (52).

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