Grain dryer with humidity control

Abstract

This invention discloses a grain dryer with humidity control, relating to the field of grain drying technology. Specifically, it includes a drying tower with a supporting base plate fixedly connected to its bottom. The drying tower contains a drying assembly, which includes a drying unit, a lifting unit, a humidity control unit, a delay unit, and a transmission unit. The humidity control unit includes a protective sleeve, inside which an electrically heated mesh is fixedly installed. This grain dryer heats the grain using the electrically heated mesh, and, in conjunction with an exhaust fan and a guide fan unit, discharges the moisture-laden air, enabling rapid drying of the grain. A humidity detection ring monitors the humidity of the heated grain, facilitating control over its moisture content. The grain is heated evenly throughout, and as it rises within the drying mesh, it vibrates continuously during this ascent, concentrating the heating and ensuring effective drying.

Description

Technical Field

[0001] This invention relates to the field of grain drying technology, and in particular to a grain dryer with humidity control. Background Technology

[0002] Grain drying methods involve providing the grain with a certain form of energy through a drying medium, causing some of the moisture in the grain to vaporize and escape. The basic conditions for achieving the drying process are the transfer, transformation, and consumption of energy.

[0003] A search revealed Chinese patent application number 202110598626.7, which discloses a gradient dehydration grain dryer, comprising a vibrating stratifier, a drying controller, a drying tower, a grading feed head, a drying hopper, a hot air circulation system, and a bottom discharge conveyor belt. The vibrating stratifier is located at the top of the drying tower and is used to vibrate and stratify the grain, so that larger and heavier grains are in the lower layer and smaller and lighter grains are in the upper layer. The grading feed head is located at the bottom of the vibrating stratifier and is connected to the top of the drying tower for injecting the grain from the vibrating stratifier into the drying chamber according to its grade. The drying tower is equipped with multiple drying hoppers that perform gradient drying of the grain. A hot air circulation system is located on the side of the drying tower to inject hot air into the tower and recover heat from the top. The bottom of the lowest drying hopper is connected to the outlet of the hot air circulation system, which uses the hot air generated by the system to dry the grain. Each drying hopper is equipped with a humidity sensor to detect the humidity of the grain inside. A drying controller controls the feeding switch of the grading feed head and is connected to the humidity sensor in the drying hopper to obtain the grain humidity.

[0004] The grain dryer device in the aforementioned patent has the following shortcomings: This device dries grain through multiple vibrating drying buckets, causing the grain to dry in layers. During the vibration process, the drying buckets place the dried grain on top of the uncooked grain, creating stratification. However, the moisture content of the grain particles is different. The drying buckets are in direct contact with the grain below, causing the grain below to heat up quickly and lose moisture rapidly, while the grain above still contains a large amount of moisture. The grain is heated locally, not as a whole, which is not conducive to controlling the drying process. Continuous vibration causes the upper and lower grains to exchange positions, but this is not conducive to controlling the overall humidity of the grain. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and propose a grain dryer with humidity control.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A grain dryer with humidity control includes:

[0008] A drying tower, wherein a supporting base plate is fixedly connected to the bottom end of the drying tower, and a drying assembly is provided inside the drying tower, the drying assembly including a drying unit, a lifting unit, a humidity control unit, a delay unit and a transmission unit;

[0009] The humidity control unit includes a protective sleeve, an electric heating mesh cylinder is fixedly installed inside the protective sleeve, a connecting ring seat is fixedly connected to the bottom end of the protective sleeve, an exhaust plate is fixedly installed at the bottom end of the connecting ring seat, a directional air guide plate is fixedly connected to one side of the exhaust plate, and multiple air jets are fixedly installed at equal intervals on the top side of the directional air guide plate.

[0010] Multiple mounting shells are fixedly connected at equal intervals on one side of the directional air guide plate. A drying plate is fixedly installed inside the mounting shell, and an air guide fan unit is fixedly installed at the bottom of the directional air guide plate.

[0011] The humidity control unit also includes a humidity detector, which is wirelessly connected to a humidity detection ring. Both the humidity detector and the electric heating mesh cylinder are connected to an external control system.

[0012] As a preferred embodiment of the present invention: the lifting unit includes a drying screen cylinder, a positioning ring is fixedly installed at the top of the outer wall of the drying screen cylinder, a plurality of fixing arms are fixedly connected at equal intervals to the outer wall of the positioning ring, a connecting body is fixedly connected to the plurality of fixing arms, and a plurality of exhaust fans are fixedly installed at equal intervals at the top of the connecting body.

[0013] As a preferred embodiment of the present invention: a feed pipe is fixedly connected to the bottom end of the drying mesh cylinder, a feed inlet is fixedly connected to one end of the feed pipe, and a spiral rod is provided inside the drying mesh cylinder, the top end of the spiral rod is rotatably connected to the connecting body, and the bottom end is rotatably connected to the feed pipe.

[0014] As a preferred embodiment of the present invention: the delay unit includes a connecting column, a piston sleeve is fixedly installed inside the connecting column, a sliding piston is slidably installed inside the piston sleeve, an electrical connecting rod is fixedly installed at the top of the sliding piston, one end of the electrical connecting rod is slidably connected to a connecting electric column, and the other end is slidably connected to a sliding resistor; a connecting airbag is fixedly connected to the bottom end of the sliding piston, a ceramic plate is fixedly connected to the bottom end of the connecting airbag, and a heat-conducting copper sheet is fixedly connected to the bottom end of the ceramic plate.

[0015] As a preferred embodiment of the present invention: the drying unit includes a rotating base, a rotating screen cylinder is fixedly connected to the top of the rotating base, and a plurality of second guide rings are fixedly connected at equal intervals to the inner wall of the rotating screen cylinder; an installation sleeve is provided inside the rotating screen cylinder, and a plurality of first guide rings are fixedly connected at equal intervals to the outer wall of the installation sleeve, and the installation sleeve is fixedly installed on the outer wall of the protective sleeve.

[0016] As a preferred embodiment of the present invention: a transmission gear ring is fixedly installed at the bottom end of the outer wall of the rotating base, a guide hopper is provided at the bottom end of the transmission gear ring, and a discharge port is connected to one end of the guide hopper.

[0017] As a preferred embodiment of the present invention: the transmission unit includes a transmission gear, the bottom end of which is fixedly connected to a transmission shaft, and the bottom end of the transmission shaft is fixedly mounted with a sprocket one, which is connected to a sprocket two via a chain drive.

[0018] As a preferred embodiment of the present invention: a coupling is provided at the bottom end of the second sprocket, the coupling is fixedly installed on the output shaft of the drive motor, and the coupling is fixedly connected to the screw rod, and the second sprocket is fixedly installed at the bottom end of the screw rod.

[0019] As a preferred embodiment of the present invention: a first partition is fixedly connected to the outer wall of the connecting ring seat, the first partition is fixedly installed on the inner wall of the drying tower, and the first partition is fixedly connected to the guide hopper.

[0020] As a preferred embodiment of the present invention: a second partition is rotatably connected to the bottom end of the rotating base, the second partition is fixedly installed on the inner wall of the drying tower, an exhaust mesh plate is fixedly installed on the outer wall of one side of the top wall of the drying tower, and a movable base is fixedly installed at the bottom end of the supporting base plate.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. This grain dryer heats the grain using an electric heating screen, and uses an exhaust fan and a guide fan unit to discharge the air carrying moisture, thus drying the grain quickly. It also uses a humidity detection ring to detect the humidity of the heated grain, making it easy to control the humidity of the grain.

[0023] 2. This grain dryer uses an electric heating mesh drum to heat the grain evenly. The grain rises inside the drying mesh drum and is driven by a spiral rod. During the rising process, the grain vibrates continuously, and the heating is concentrated to ensure the drying effect.

[0024] 3. This grain dryer, through the various structures of the humidity control unit, monitors and adjusts the humidity in real time during the grain drying process. In conjunction with the delay unit, it reduces the speed at which the exhaust fan unit power is reduced, allowing the temperature inside the protective sleeve to drop rapidly. This improves the effect of humidity regulation during drying, ensures the effect and efficiency of grain drying, and facilitates the use of the entire device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall assembly of the present invention;

[0026] Figure 2 This is a cross-sectional view of the drying tower of the present invention.

[0027] Figure 3 This is a schematic diagram of the overall spatial structure of the drying assembly of the present invention;

[0028] Figure 4 This is a schematic diagram of the transmission unit of the present invention;

[0029] Figure 5 This is a cross-sectional view of the drying unit of the present invention;

[0030] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A;

[0031] Figure 7 This is a schematic diagram of the overall spatial structure of the drying unit of the present invention;

[0032] Figure 8 This is a cross-sectional structural schematic diagram of the lifting unit of the present invention;

[0033] Figure 9 This is a schematic diagram of the overall spatial position structure of the lifting unit of the present invention.

[0034] In the diagram: 1. Movable base; 2. Support base plate; 3. Feed inlet; 4. Drying tower; 5. Discharge outlet; 6. Feed pipe; 7. Exhaust plate; 8. Connecting ring seat; 9. First partition plate; 10. Protective sleeve; 11. Electric heating mesh cylinder; 12. Mounting sleeve; 13. First guide ring plate; 14. Directional air guide plate; 15. Air jet; 16. Mounting shell; 17. Drying plate; 18. Air guide fan unit; 19. Guide hopper; 20. Second partition plate; 21. Rotating base; 22. Transmission gear ring; 23. Rotating mesh cylinder; 24. Second guide ring plate; 25. Drying mesh drum; 26. Positioning ring; 27. Fixing arm; 28. Connecting body; 29. ​​Exhaust fan; 30. Spiral rod; 31. Drive motor; 32. Humidity detection ring; 33. Humidity detector; 34. Exhaust mesh plate; 35. Drive shaft; 36. Drive gear; 37. Sprocket 1; 38. Sprocket 2; 39. Coupling; 40. Connecting column; 41. Connecting electric column; 42. Piston sleeve; 43. Sliding resistor; 44. Sliding piston; 45. Electrical connecting rod; 46. Connecting airbag; 47. Ceramic plate; 48. Thermally conductive copper sheet. Detailed Implementation

[0035] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0036] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0037] Example 1:

[0038] A grain dryer with humidity control, such as Figures 1 to 9 As shown, it includes:

[0039] The drying tower 4 has a support base plate 2 fixedly connected to its bottom end by bolts. A movable base 1 is fixedly installed at the bottom end of the support base plate 2. The movable base 1 drives the entire device to move, which facilitates the adjustment of the position of the entire device and makes the use of the entire device more flexible.

[0040] The drying tower 4 is equipped with a drying assembly, which includes a drying unit, a lifting unit, a humidity control unit, a delay unit, and a transmission unit. The lifting unit lifts the grain from a low position to a high position; the humidity control unit controls the heating temperature of the grain inside the lifting unit to control the evaporation of moisture from the grain; the drying unit quickly removes water vapor from the heated grain inside the lifting unit to keep the grain dry; and the transmission unit drives the local components of the lifting unit and the drying unit to rotate, making the grain drying more uniform.

[0041] The lifting unit includes a drying screen cylinder 25. A positioning ring 26 is fixedly installed at the top of the outer wall of the drying screen cylinder 25. Multiple fixing arms 27 are welded at equal intervals on the outer wall of the positioning ring 26. The multiple fixing arms 27 are fixedly connected to a connecting body 28 by bolts.

[0042] The bottom end of the connector 28 is provided with a groove, the fixing arm 27 is fixedly connected to the inner wall of the groove, and the top end of the connector 28 is fixedly connected to the inner wall of the top end of the drying tower 4 by bolts. Multiple exhaust fans 29 are fixedly installed at equal intervals on the top groove wall of the connector 28 groove. The air outlet of the exhaust fan 29 passes through the top end of the drying tower 4, and the multiple exhaust fans 29 are set above the drying screen cylinder 25 to facilitate the rapid removal of moisture.

[0043] A feed pipe 6 is fixedly connected to the bottom end of the drying screen cylinder 25. One end of the feed pipe 6 penetrates the tower body of the drying tower 4 and extends outward. A feed inlet 3 is welded to the extended end. The feed inlet 3 is wide-mouthed and vertically upward to facilitate grain introduction. The feed pipe 6 is inclined, such as... Figure 2 and Figure 3 As shown, this allows for quick entry of two parts into the bottom of the drying mesh cylinder 25.

[0044] The drying screen cylinder 25 is equipped with a spiral rod 30. The top end of the spiral rod 30 is rotatably connected to the connecting body 28 through a bearing, and the bottom end is rotatably connected to the feed pipe 6 through a bearing. The bottom end of the spiral rod 30 extends out of the feed pipe 6. The spiral rod 30 lifts the grain inside the feed pipe 6 into the drying screen cylinder 25 and discharges the heated grain through the outlet at the top of the drying screen cylinder 25.

[0045] A gear is installed at the top of the screw rod 30, which drives multiple exhaust fans 29 through gear meshing. The faster the screw rod 30 rotates, the faster the exhaust speed of the exhaust fans 29.

[0046] The humidity control unit includes a protective sleeve 10. The bottom end of the protective sleeve 10 is configured as an upwardly protruding frustum and is fixedly connected to the outer wall of the drying mesh cylinder 25. An electric heating mesh cylinder 11 is fixedly installed inside the protective sleeve 10. The electric heating mesh cylinder 11 heats up rapidly after being powered on, and the heat passes through the drying mesh cylinder 25 to heat the grain.

[0047] The bottom end of the protective sleeve 10 is fixedly connected to a connecting ring seat 8, which is fixedly sleeved on the outer wall of the drying screen cylinder 25. The top end of the connecting ring seat 8 is provided with multiple vent holes at equal intervals. The bottom end of the connecting ring seat 8 is fixedly installed with an exhaust plate 7. A directional air guide plate 14 is fixedly connected to one side of the exhaust plate 7. Multiple air jets 15 are fixedly installed at equal intervals on the top side of the directional air guide plate 14.

[0048] The heat generated by the electric heating mesh cylinder 11 enters the protective sleeve 10 along with the water vapor generated by the heating of the grain. The water vapor and some heat enter the exhaust plate 7 through the vent hole, and then enter the interior of the directional air guide plate 14, and are sprayed out through the air jet 15.

[0049] A first partition 9 is fixedly connected to the outer wall of the connecting ring seat 8. The first partition 9 is fixedly installed on the inner wall of the drying tower 4. The drying mesh cylinder 25 passes through the first partition 9. The feed pipe 6 is located below the first partition 9. The directional air guide plate 14 passes through the first partition 9.

[0050] Multiple mounting shells 16 are fixedly connected at equal intervals on one side of the directional air guide plate 14. The end of the mounting shell 16 away from the protective sleeve 10 penetrates the tower body of the drying tower 4. A drying plate 17 is fixedly installed inside the mounting shell 16. The drying plate 17 can be made of physical desiccant, such as activated alumina. A guide fan unit 18 is fixedly installed at the bottom of the directional air guide plate 14.

[0051] The air guide fan unit 18 draws the hot airflow inside the protective sleeve 10 into the directional air guide plate 14 through the air vent. The hot airflow passes through the drying plate 17, which absorbs a large amount of moisture carried in the hot airflow. The dried hot airflow is then sprayed out through the jet nozzle 15.

[0052] The delay unit includes a connecting post 40, such as Figure 7 As shown, the connecting column 40 is fixedly connected to the top of the horizontal section of the directional air guide plate 14. A piston sleeve 42 is fixedly installed inside the connecting column 40. A sliding piston 44 is slidably installed inside the piston sleeve 42. An electric connecting rod 45 is fixedly installed at the top of the sliding piston 44. Sliding grooves are opened on both sides of the piston sleeve 42. The two ends of the electric connecting rod 45 are slidably installed in the two sliding grooves respectively.

[0053] One end of the electrical connecting rod 45 is slidably connected to a connecting post 41, which is connected to an external power source. The other end is slidably connected to a sliding resistor 43, which is electrically connected to the air guide fan unit 18.

[0054] A connecting airbag 46 is fixedly connected to the bottom end of the sliding piston 44, a ceramic plate 47 is fixedly connected to the bottom end of the connecting airbag 46, a heat-conducting copper sheet 48 is fixedly connected to the bottom end of the ceramic plate 47, and the bottom end of the heat-conducting copper sheet 48 is fixedly connected to the directional air guide plate 14.

[0055] When the air guide fan unit 18 draws hot air from inside the protective sleeve 10, the temperature carried by the hot air is conducted to the air inside the connecting air bag 46. The air expands due to the heat, causing the connecting air bag 46 to extend, which in turn drives the sliding piston 44 to move upward, making the resistance value of the sliding resistor 43 smaller, increasing the current of the air guide fan unit 18, and making the air guide speed faster.

[0056] The humidity control unit also includes a humidity detector 33, which is fixedly installed on one side of the connector 28 and fixedly connected to the tower body of the drying tower 4. The humidity detector 33 is wirelessly connected to a humidity detection ring 32, which is sleeved on the top of the spiral rod 30 and located inside the top outlet of the drying mesh cylinder 25.

[0057] The humidity detection ring 32 includes a mounting ring, on which multiple humidity detection sensors are fixedly mounted at equal intervals on the outer wall of the mounting ring. The humidity detection sensors are electrically connected to a wireless signal transmission motherboard, which is fixedly installed inside the mounting ring.

[0058] Both the humidity detector 33 and the electric heating mesh cylinder 11 are connected to an external control system. The humidity detector 33 determines the real-time power of the electric heating mesh cylinder 11 based on the grain humidity detected by the humidity detection ring 32. The higher the real-time power of the electric heating mesh cylinder 11, the higher the temperature of the hot airflow, the faster the rotation speed of the air guide fan unit 18, and the faster the exhaust speed. Conversely, the lower the real-time power, the slower the exhaust speed.

[0059] The drying unit includes a rotating base 21, a rotating screen cylinder 23 is welded to the top of the rotating base 21, and multiple second guide rings 24 are welded at equal intervals on the inner wall of the rotating screen cylinder 23. The rotating screen cylinder 23 is sleeved on the outside of the protective sleeve 10, and multiple air jets 15 spray air in the direction of the rotating screen cylinder 23.

[0060] A transmission gear ring 22 is fixedly installed at the bottom of the outer wall of the rotating base 21. A guide hopper 19 is provided at the bottom of the transmission gear ring 22. The bottom of the guide hopper 19 is fixedly connected to the first partition plate 9. One end of the guide hopper 19 is connected to a discharge port 5, which is welded to the front of the drying tower 4.

[0061] The bottom end of the rotating base 21 is rotatably connected to the second partition 20 via a bearing. The second partition 20 blocks the top of the guide hopper 19, and the protective sleeve 10 penetrates the guide hopper 19. The second partition 20 is fixedly installed on the inner wall of the drying tower 4. An exhaust mesh plate 34 is fixedly installed on the outer wall of the top wall on one side of the drying tower 4.

[0062] The hot air jet from the jet nozzle 15 reheats the grain inside the rotating mesh cylinder 23, causing the moisture on the surface of the grain to be quickly discharged through the exhaust mesh plate 34 along with the hot air jet, thus drying the grain quickly.

[0063] The rotating mesh cylinder 23 is provided with an installation sleeve 12 inside. Multiple first guide rings 13 are fixedly connected at equal intervals to the outer wall of the installation sleeve 12. The installation sleeve 12 is fixedly installed on the outer wall of the protective sleeve 10. The bottom end of the rotating mesh cylinder 23 is provided with a through hole. The diameter of the through hole is set to be two to two and a half times the outer diameter of the protective sleeve 10, so as to facilitate the rapid entry of grain into the guide hopper 19.

[0064] The spiral rod 30 guides the heated grain through the top outlet of the drying mesh cylinder 25. The grain slides to the top of the protective sleeve 10 and then into the rotating mesh cylinder 23. With the combined action of multiple first guide rings 13 and second guide rings 24, the falling speed is reduced, making it easier for the hot airflow from the jet nozzle 15 to reheat the grain.

[0065] The transmission unit includes a transmission gear 36, which meshes with a transmission gear ring 22. A transmission shaft 35 is fixedly connected to the bottom end of the transmission gear 36. The transmission shaft 35 passes through the second partition 20 and the first partition 9 and extends downward. A bearing is provided at its connection point.

[0066] A sprocket 37 is fixedly mounted at the bottom end of the drive shaft 35. The sprocket 37 is connected to a sprocket 38 via a chain drive. The sprocket 38 is fixedly mounted at the bottom end of the extension of the screw rod 30.

[0067] The bottom end of the second sprocket 38 is provided with a coupling 39, which is fixedly installed on the output shaft of the drive motor 31 and is fixedly connected to the extension end of the screw rod 30.

[0068] When using this embodiment:

[0069] Grain is introduced into the feed inlet 3 through a conveying mechanism (e.g., a conveyor belt). The grain falls down along the feed pipe 6 and enters the bottom of the drying screen cylinder 25. The drive motor 31 drives the screw rod 30 to rotate at high speed through the coupling 39, lifting the grain and causing it to rise inside the drying screen cylinder 25. Then, the grain slides down through the top of the protective sleeve 10 into the rotating screen cylinder 23. Under the combined action of the first guide ring 13 and the second guide ring 24, the grain slides down into the rotating base 21 and then falls into the guide hopper 19. Finally, it is discharged through the discharge port 5.

[0070] During the above process, the grain rises along the drying mesh cylinder 25. The electric heating mesh cylinder 11 is energized to heat the grain inside the drying mesh cylinder 25, causing the grain's moisture to evaporate and enter the protective sleeve 10 through the drying mesh cylinder 25. When the grain rises to the top of the drying mesh cylinder 25, the humidity detection ring 32 detects the humidity of the grain and wirelessly transmits the detection data to the humidity detector 33. The humidity detector 33 transmits the data to the external control system (device). The external control system controls the working power of the electric heating mesh cylinder 11 and the drive motor 31 according to the data. The faster the output speed of the drive motor 31, the faster the exhaust fan 29 removes the water vapor and heat emitted by the grain at the top of the drying mesh cylinder 25.

[0071] Based on the temperature of the hot airflow flowing inside the directional air guide plate 14, the delay unit adjusts the rotation speed of the air guide fan unit 18 to extract the heat and moisture inside the protective sleeve 10 and introduce it into the directional air guide plate 14. After being dried by multiple drying plates 17, it is sprayed out through the jet nozzle 15 and sprayed onto the rotating mesh cylinder 23.

[0072] The higher the temperature of the hot airflow, the faster the rotation speed of the air guide fan unit 18 and the faster the exhaust speed. When the temperature of the hot airflow drops rapidly, the rotation speed of the air guide fan unit 18 gradually decreases under the action of the connecting air bag 46, ensuring that the hot airflow and water vapor can be discharged quickly and the inside of the protective sleeve 10 can be cooled down quickly.

[0073] The drive motor 31 drives the first sprocket 37 through the second sprocket 38. The first sprocket 37 drives the transmission gear 36 to rotate through the transmission shaft 35. The transmission gear 36 meshes with the transmission gear ring 22. The transmission gear ring 22 drives the rotating mesh cylinder 23 to rotate. The rotating mesh cylinder 23 drives the incoming grain to rotate centrifugally and receive the hot airflow sprayed by the jet nozzle 15. The hot airflow dries the grain quickly and carries the water vapor on the surface of the grain out through the exhaust mesh plate 34.

[0074] Example 2:

[0075] Based on Embodiment 1, the jet eye 15 is removed, allowing the directional air guide plate 14 to be directly connected to the outside world. At the same time, the connection position of the directional air guide plate 14 is changed to the top of the protective sleeve 10 to accelerate the discharge of water vapor.

[0076] Multiple heat-conducting rods are welded at equal intervals on the outer wall of the protective sleeve 10. One end of the heat-conducting rod passes through the protective sleeve 10 and is located between the electric heating mesh cylinder 11 and the drying mesh cylinder 25. The other end passes through the mounting sleeve 12 and is located inside the rotating mesh cylinder 23. The grain comes into contact with the heat-conducting rods to accelerate the drying speed. At the same time, an exhaust fan is added to one side of the exhaust mesh plate 34 to accelerate the airflow speed.

[0077] Example 3:

[0078] Based on Examples 1 and 2, a cooling fan structure is added to the top of the feed hopper 19 to accelerate the cooling speed of the grain after drying, reduce the temperature of the grain, facilitate the transfer and storage of the grain, and avoid long-term accumulation, which would result in slow heat dissipation and heat accumulation, causing unnecessary loss of grain.

[0079] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grain dryer with humidity control, characterized by, include: The drying tower (4) is fixedly connected to a support base plate (2) at its bottom end, and the drying tower (4) is equipped with a drying assembly inside, which includes a drying unit, a lifting unit, a humidity control unit, a delay unit and a transmission unit. The humidity control unit includes a protective sleeve (10), an electric heating mesh cylinder (11) is fixedly installed inside the protective sleeve (10), and a connecting ring seat (8) is fixedly connected to the bottom end of the protective sleeve (10). An exhaust plate (7) is fixedly installed at the bottom end of the connecting ring seat (8). A directional air guide plate (14) is fixedly connected to one side of the exhaust plate (7), and multiple air jets (15) are fixedly installed at equal intervals on the top side of one side of the directional air guide plate (14). A plurality of mounting shells (16) are fixedly connected at equal intervals on one side of the directional air guide plate (14), a drying plate (17) is fixedly installed inside the mounting shell (16), and an air guide fan unit (18) is fixedly installed at the bottom end of the directional air guide plate (14). The humidity control unit also includes a humidity detector (33), which is wirelessly connected to a humidity detection ring (32), and both the humidity detector (33) and the electric heating mesh cylinder (11) are connected to an external control system. The lifting unit includes a drying mesh cylinder (25), and a spiral rod (30) is provided inside the drying mesh cylinder (25). The humidity detection ring (32) is sleeved on the top end of the spiral rod (30). The delay unit includes a connecting column (40), a piston sleeve (42) is fixedly installed inside the connecting column (40), a sliding piston (44) is slidably installed inside the piston sleeve (42), and an electrical connecting rod (45) is fixedly installed at the top of the sliding piston (44). One end of the electrical connecting rod (45) is slidably connected to a connecting post (41), and the other end is slidably connected to a sliding resistor (43). The sliding resistor (43) is electrically connected to the air guide fan unit (18). The bottom end of the sliding piston (44) is fixedly connected to a connecting air bag (46). The bottom end of the connecting air bag (46) is fixedly connected to a ceramic plate (47). The bottom end of the ceramic plate (47) is fixedly connected to a heat-conducting copper sheet (48). The bottom end of the heat-conducting copper sheet (48) is fixedly connected to the directional air guide plate (14).

2. A grain dryer with humidity control as claimed in claim 1, characterized in that: A positioning ring (26) is fixedly installed at the top of the outer wall of the drying mesh cylinder (25). Multiple fixing arms (27) are fixedly connected at equal intervals to the outer wall of the positioning ring (26). Multiple fixing arms (27) are fixedly connected to a connecting body (28). Multiple exhaust fans (29) are fixedly installed at equal intervals at the top of the connecting body (28).

3. A grain dryer with humidity control as claimed in claim 2, characterized in that: The bottom end of the drying mesh cylinder (25) is fixedly connected to the feed pipe (6), and one end of the feed pipe (6) is fixedly connected to the feed port (3). The top end of the spiral rod (30) is rotatably connected to the connecting body (28), and the bottom end is rotatably connected to the feed pipe (6).

4. A grain dryer with humidity control according to claim 1, characterized in that: The drying unit includes a rotating base (21), a rotating screen cylinder (23) is fixedly connected to the top of the rotating base (21), and a plurality of second guide rings (24) are fixedly connected at equal intervals to the inner wall of the rotating screen cylinder (23); an installation sleeve (12) is provided inside the rotating screen cylinder (23), and a plurality of first guide rings (13) are fixedly connected at equal intervals to the outer wall of the installation sleeve (12), and the installation sleeve (12) is fixedly installed on the outer wall of the protective sleeve (10).

5. A grain dryer with humidity control according to claim 4, characterized in that: A transmission gear ring (22) is fixedly installed at the bottom of the outer wall of the rotating base (21). A guide hopper (19) is provided at the bottom of the transmission gear ring (22). One end of the guide hopper (19) is connected to a discharge port (5).

6. A grain dryer with humidity control according to claim 1, characterized in that: The transmission unit includes a transmission gear (36), the bottom end of which is fixedly connected to a transmission shaft (35), and the bottom end of the transmission shaft (35) is fixedly mounted with a sprocket (37), which is connected to a sprocket (38) via a chain drive.

7. A grain dryer with humidity control according to claim 6, characterized in that: The bottom end of the second sprocket (38) is provided with a coupling (39), which is fixedly installed on the output shaft of the drive motor (31) and is fixedly connected to the screw rod (30). The second sprocket (38) is fixedly installed on the bottom end of the screw rod (30).

8. A grain dryer with humidity control according to claim 1, characterized in that: The outer wall of the connecting ring seat (8) is fixedly connected to a first partition (9), which is fixedly installed on the inner wall of the drying tower (4) and is fixedly connected to the guide hopper (19).

9. A grain dryer with humidity control according to claim 4, characterized in that: The bottom end of the rotating base (21) is rotatably connected to a second partition (20), the second partition (20) is fixedly installed on the inner wall of the drying tower (4), an exhaust mesh plate (34) is fixedly installed on the outer wall of the top side of the drying tower (4), and a movable base (1) is fixedly installed at the bottom end of the supporting base plate (2).

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