A grain dryer conveying device and conveying method

Abstract

This invention relates to the field of conveying devices for dryers, specifically a conveying device and method for a grain dryer. The invention includes a lower conveying platform, a lower conveying hopper at the top of the platform, a metering hopper at the bottom of the hopper, a rotatable feed wheel connected inside the metering hopper, an arc-shaped feed trough at one end of the feed wheel, a moisture sensor fixedly connected to the bottom of the arc-shaped feed trough, a discharge port at the bottom of the metering hopper, and a cooling trough and a circulating trough at the bottom of the discharge port. A guide plate is hinged inside the metering hopper and installed between the cooling trough and the circulating trough. This invention uses a moisture sensor to monitor the moisture content of the grain in real time, and in conjunction with a drive and transmission assembly, ensures that the grain is effectively separated based on its moisture content as it passes through the lower conveying hopper into the cooling trough or the circulating trough.

Description

Technical Field

[0001] This invention relates to the field of dryer conveying devices, specifically a grain dryer conveying device and conveying method. Background Technology

[0002] Harvested grains often contain high moisture content. If not dried promptly, they easily become a breeding ground for mold, leading to spoilage and rendering the grain inedible or unsuitable for seed. Grain dryers effectively solve this problem. Through scientific drying processes, the moisture content of grains can be precisely reduced to within the safe storage range, preventing mold and sprouting, significantly improving storage stability, extending shelf life, and ensuring both quantity and quality safety.

[0003] Existing grain drying equipment, such as the large grain dryer conveying device proposed in patent application number "CN205066401U", includes a conveying shell, a circulating grain discharge mechanism, and a grain dispensing bin. The grain dispensing bin is formed by a left vertical plate, a right inclined plate, and two front and rear inclined plates. A circulating discharge port is opened at the lower part of the left vertical plate. The circulating grain discharge mechanism is located outside the grain dispensing bin and communicates with the circulating discharge port. The conveying shell is located at the lower end of the grain dispensing bin and is fixedly connected to the bottom of the three inclined plates. The spiral conveyor shaft for conveying grain passes through the circulating discharge port and is located inside the conveying shell and the circulating grain discharge mechanism.

[0004] However, in practical applications, the aforementioned patented technology, after grain drying, guides the grain to fall and accumulate in the grain hopper through the rotation of a series of grain-distributing wheels. This method results in the accumulation of steam generated during the drying process within the grain pile before the grain temperature has sufficiently decreased, causing uneven moisture distribution inside and outside the pile. Subsequently, in subsequent cyclic drying processes, the unevenly moist grains are subjected to synchronous drying again, leading to over-drying of grains with lower moisture content while grains with higher moisture content continue to dry, affecting the drying quality of the grains. Summary of the Invention

[0005] The purpose of this invention is to provide a grain dryer conveying device and conveying method to solve the problems mentioned in the background art.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A grain dryer conveying device includes a lower conveying platform, a lower conveying hopper at the top of the lower conveying platform, a metering hopper at the bottom of the lower conveying hopper, a distributing wheel rotatably connected inside the metering hopper, an arc-shaped distributing groove at one end of the distributing wheel, a moisture sensor fixedly connected to the bottom of the arc-shaped distributing groove, a discharge port at the bottom of the metering hopper, a cooling trough and a circulating trough at the bottom of the discharge port, and a guide plate hinged inside the metering hopper, the guide plate being installed between the cooling trough and the circulating trough.

[0008] One end of the lower conveyor is equipped with a drive assembly for driving the material distribution wheel to rotate, and another end of the lower conveyor is equipped with a transmission assembly for driving the guide plate to deflect. The output end of the circulating trough is equipped with a circulation assembly for guiding the grain to circulate and dry. One end of the cooling trough is equipped with a feeding mechanism for cooling the grain.

[0009] Preferably, the drive assembly includes a worm gear fixedly connected to one end of the distribution wheel, a worm gear meshing with the worm gear is rotatably connected to the outer side of the lower conveyor platform, a sorting motor is fixedly connected to the outer side of the lower conveyor platform, the output end of the sorting motor is fixedly connected to the worm gear, and the sorting motor is electrically connected to a moisture sensor.

[0010] Preferably, the transmission assembly includes a first transmission gear rotatably connected to the outside of the lower conveyor table, a second transmission gear meshing with the first transmission gear fixedly connected to the hinge end of the guide plate, a first transmission wheel fixedly connected to one end of the first transmission gear, a second transmission wheel fixedly connected to one end of the distribution wheel, and a polyurethane transmission belt sleeved around the second transmission wheel and the first transmission wheel, which is a toothless design.

[0011] Preferably, the friction coefficient μ of the polyurethane transmission belt satisfies μR≥T_max / F_N with respect to the radii R of transmission wheel one and transmission wheel two, where T_max is the maximum allowable torque of the system and F_N is the normal pressure of the pulley on the transmission belt.

[0012] Preferably, the circulation assembly includes a circulation trough located at one end of the lower conveyor platform, the input end of the circulation trough being connected to the output end of the circulation trough, a circulation auger being rotatably connected inside the circulation trough, a circulation motor being fixedly connected to the top of the lower conveyor platform, the output end of the circulation motor being fixedly connected to the circulation auger, and a guide trough communicating with the inside of the circulation trough being located at one end of the lower conveyor platform.

[0013] Preferably, the feeding mechanism includes a cyclone separator fixedly connected to one end of the lower conveyor platform, a fan fixedly connected to one end of the lower conveyor platform, the output end of the fan being connected to the top air outlet of the cyclone separator through a pipe, and a cooling component being installed inside the cyclone separator.

[0014] Preferably, the cooling assembly includes a spiral cooling trough formed inside the cyclone separator, one end of the lower conveyor is fixedly connected to a cooler, and the other end of the lower conveyor is fixedly connected to a water pump. A spiral guide platform is fixedly connected inside the cyclone separator, and a collection box is installed on one side of the lower conveyor. The collection box is installed below the output end of the cyclone separator. The output end of the spiral cooling trough is fixedly connected to a first guide pipe, which is fixedly connected to the input end of the water pump. The input end of the spiral cooling trough is fixedly connected to a second guide pipe, which is fixedly connected to the output end of the cooler. The input end of the cooler is fixedly connected to a third guide pipe, which is fixedly connected to the output end of the water pump.

[0015] Preferably, the lower conveying bin has an internal rotating connecting sleeve rod, the bottom of which is fixedly connected to an arc-shaped screen one; the lower conveying bin has an internal rotating connecting inner rod, the bottom of which is fixedly connected to an arc-shaped screen two; one end of the inner rod passes through the inside of the sleeve rod and is fixedly connected to a linkage component for driving the sleeve rod and the inner rod to rotate coaxially and in opposite directions.

[0016] Preferably, the linkage assembly includes a bevel gear one fixedly connected to one end of the sleeve rod, a bevel gear two fixedly connected to one end of the inner rod, a bevel gear three rotatably connected to the outer side of the lower conveyor table, the bevel gear three being installed between the bevel gear one and the bevel gear two and meshing synchronously with the bevel gear one and the bevel gear two, a bevel gear four fixedly connected to one end of the bevel gear three, and a bevel gear five meshing with the bevel gear four fixedly connected to one end of the worm gear.

[0017] A method for conveying grain in a grain dryer, the method comprising the following steps:

[0018] S1. Moisture detection and sorting transport

[0019] The moisture sensor is activated to monitor the moisture content of the grain collected in the arc-shaped distribution trough in real time. If the moisture content meets the standard, the classification motor is triggered to run in the forward direction, driving the worm gear and worm wheel to mesh. If the moisture content exceeds the standard, it runs in the reverse direction. The distribution wheel rotates 180 degrees to one side of the cooling trough or the circulating trough under the drive of the worm wheel, causing the arc-shaped distribution trough to flip, so that the grain falls into the interior of the quantitative hopper. At the same time, the guide plate is driven by the polyurethane transmission belt to deflect in the opposite direction to the distribution wheel, so that it tilts and fits against the inner wall of the quantitative hopper, guiding the grain to slide along the slope into the designated channel. Grain that meets the standard enters the cooling trough, and grain that exceeds the standard enters the circulating trough.

[0020] S2, Cooling and Impurity Separation

[0021] The fan is started to draw the grain inside the cooling trough into the cyclone separator. The grain falls slowly along the spiral guide table to extend the heat dissipation time. The refrigeration unit and water pump are started to circulate the cooling medium through the spiral refrigeration tank to the cyclone separator, where it exchanges heat with the grain to cool it down. The heavier grain falls into the collection box to complete the cooling and collection, while the lighter dust is discharged by the fan with the airflow.

[0022] S3, Circulating Drying

[0023] Excessive grain is introduced into the bottom of the circulating tank through the circulating trough. The circulating motor is started to drive the circulating auger to lift the grain to the input end of the dryer. The grain slides down the guide trough to the inlet of the dryer for secondary drying.

[0024] S4. Prevents accumulation and ensures uniform dispersion

[0025] While driving the worm gear to rotate, it drives bevel gear five to rotate, and at the same time drives bevel gear three to drive bevel gear one and bevel gear two to rotate in opposite directions, thereby causing arc screen one and arc screen two to deflect alternately, intercepting and scattering the falling grain, ensuring that it is evenly distributed into the interior of the lower conveyor bin, so as to reduce the accumulation of grain and the resulting steam retention.

[0026] The beneficial effects of this invention are:

[0027] 1. This invention uses a moisture sensor to monitor the moisture content of grains in real time. Combined with a drive and transmission assembly, this ensures that grains are effectively separated based on their moisture content as they pass through the lower conveyor hopper into the cooling or circulating feed trough. This process not only improves the efficiency of subsequent processing but also prevents quality problems that may arise from mixing grains with different moisture contents.

[0028] 2. This invention uses a fan to draw grain from the cooling trough into the cyclone separator. The grain slowly falls along a spiral guide platform, extending the heat dissipation time. Subsequently, the refrigeration unit and water pump are activated, circulating the cooling medium through a spiral refrigeration trough to the cyclone separator, where it exchanges heat with the grain to lower its temperature. Heavier grain falls into a collection bin to complete cooling and is collected, while lighter dust particles are discharged by the fan with the airflow. This design not only improves cooling efficiency but also ensures the uniformity of grain cooling during the process, preventing quality degradation caused by localized excessively high or low temperatures.

[0029] 3. While driving the worm gear to rotate, the present invention also causes the fifth bevel gear to rotate, and further drives the third bevel gear to drive the first and second bevel gears to rotate in opposite directions, thereby causing the first and second arc screens to deflect alternately, intercepting and scattering the falling grain, ensuring that the grain is evenly distributed into the interior of the lower conveying bin, so as to reduce steam retention caused by grain accumulation. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a side sectional view of the lower conveyor table in this invention;

[0033] Figure 3 This is an exploded view of the internal structure of the lower conveyor platform in this invention;

[0034] Figure 4 This is a three-dimensional structural diagram of the driving component in this invention;

[0035] Figure 5 This is a three-dimensional structural diagram of the transmission component in this invention;

[0036] Figure 6 This is a schematic diagram showing the connection relationship between the polyurethane transmission belt and transmission wheel one and transmission wheel two in this invention;

[0037] Figure 7 This is an exploded view of the internal structure of the cyclone separation chamber in this invention;

[0038] Figure 8 This is a three-dimensional structural diagram of the linkage component in this invention;

[0039] The attached diagram is labeled as follows: 1. Lower conveyor platform; 2. Lower conveyor hopper; 3. Quantitative bin; 4. Distributor wheel; 5. Arc-shaped distributor trough; 6. Moisture sensor; 7. Discharge port; 8. Cooling trough; 9. Circulating trough; 10. Guide plate; 11. Worm gear; 12. Worm; 13. Sorting motor; 14. Transmission gear one; 15. Transmission gear two; 16. Transmission wheel one; 17. Transmission wheel two; 18. Polyurethane transmission belt; 19. Circulating trough; 20. Circulating auger; 21. 1. Circulating motor; 22. Feed chute; 23. Cyclone separator; 24. Fan; 25. Spiral refrigeration trough; 26. Refrigerator; 27. Water pump; 28. Spiral feed platform; 30. Sleeve rod; 31. Arc screen one; 32. Inner rod; 33. Arc screen two; 34. Bevel gear one; 35. Bevel gear two; 36. Bevel gear three; 37. Bevel gear four; 38. Bevel gear five; 39. Collection box; 40. Feed pipe one; 41. Feed pipe two; 42. Feed pipe three. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] A grain dryer conveying device and method, wherein the conveying device quantitatively classifies and collects grains, such as... Figure 2 As shown, grains are sorted and conveyed to the feeding mechanism or circulation component according to their moisture content through an arc-shaped feeding trough, which is a type of sorting and conveying equipment.

[0042] like Figures 1-6 As shown, it includes a lower conveyor platform 1, a lower conveyor bin 2 opened at the top of the lower conveyor platform 1, a metering bin 3 opened at the bottom of the lower conveyor bin 2, a material distribution wheel 4 rotatably connected inside the metering bin 3, an arc-shaped material distribution groove 5 opened at one end of the material distribution wheel 4, a moisture sensor 6 fixedly connected to the bottom of the arc-shaped material distribution groove 5, a discharge port 7 opened at the bottom of the metering bin 3, a cooling material groove 8 and a circulating material groove 9 respectively opened at the bottom of the discharge port 7, and a guide plate 10 hinged inside the metering bin 3, the guide plate 10 being installed between the cooling material groove 8 and the circulating material groove 9;

[0043] One end of the lower conveyor 1 is equipped with a drive assembly for driving the material distribution wheel 4 to rotate, and one end of the lower conveyor 1 is equipped with a transmission assembly for driving the guide plate 10 to deflect. The output end of the circulating trough 9 is equipped with a circulation assembly for guiding the grain to circulate and dry. One end of the cooling trough 8 is equipped with a feeding mechanism for cooling the grain.

[0044] The drive assembly includes a worm gear 11 fixedly connected to one end of the material distribution wheel 4, a worm 12 rotatably connected to the outer side of the lower conveyor platform 1 and meshing with the worm gear 11, a sorting motor 13 fixedly connected to the outer side of the lower conveyor platform 1, the output end of the sorting motor 13 fixedly connected to the worm 12, and the sorting motor 13 electrically connected to the moisture sensor 6.

[0045] Furthermore, the transmission assembly includes a transmission gear 14 rotatably connected to the outside of the lower conveyor 1, a transmission gear 15 meshing with the transmission gear 14 fixedly connected to the hinge end of the guide plate 10, a transmission wheel 16 fixedly connected to one end of the transmission gear 14, a transmission wheel 17 fixedly connected to one end of the material distribution wheel 4, and a polyurethane transmission belt 18 sleeved around the transmission wheel 17 and the transmission wheel 16, which is a toothless design.

[0046] Furthermore, the friction coefficient μ of the polyurethane transmission belt 18 and the radius R of the first transmission wheel 16 and the second transmission wheel 17 satisfy μR≥T_max / F_N, where T_max is the maximum allowable torque of the system and F_N is the normal pressure of the pulley on the transmission belt.

[0047] In operation, firstly, connect the top of the lower conveyor bin 2 to the output end of the grain dryer, ensuring that the grain falls into the interior of the lower conveyor bin 2 after passing through the grain dryer. Next, gravity causes the grain to slide down the inner wall of the lower conveyor bin 2 into the arc-shaped distribution trough 5 for collection. Simultaneously, activate the moisture sensor 6 to monitor the moisture content of the grain collected in the arc-shaped distribution trough 5 in real time. The moisture sensor 6 uses a Decagon GS3 moisture sensor; based on the monitoring data from the moisture sensor 6, determine whether the moisture content of the grain collected in the arc-shaped distribution trough 5 meets the standard.

[0048] When the moisture sensor 6 detects that the moisture content of the grain collected in the arc-shaped distributing trough 5 has reached the standard, it controls the sorting motor 13 to drive the worm gear 12 to rotate, and the worm gear 12 meshes with the worm wheel 11. At the same time, the worm wheel 11 drives the distributing wheel 4 to rotate 180 degrees towards the cooling trough 8, thereby causing the distributing wheel 4 to drive the arc-shaped distributing trough 5 to rotate towards the inside of the quantitative storage bin 3. In this way, the grain with the moisture content within the standard range falls into the quantitative storage bin 3 under the action of gravity. At the same time, the distributing wheel 4 drives the transmission wheel 17 to rotate synchronously, and drives the transmission wheel 16 to rotate synchronously through the polyurethane transmission belt 18, so that the transmission wheel 16 meshes with the transmission gear 14. Then, the transmission gear 15 drives the guide plate 10 to deflect in the opposite direction to the distributing wheel 4, so that the top of the guide plate 10 contacts the inner wall of the quantitative storage bin 3, and is installed at an angle inside the quantitative storage bin 3. In this way, the grain falling from the arc-shaped material distribution trough 5 into the quantitative bin 3 will slide down the guide slope of the guide plate 10 into the cooling trough 8, and then enter the feeding mechanism through the cooling trough 8 for cooling and discharge.

[0049] If the moisture sensor 6 detects that the moisture content of the grain collected in the arc-shaped distributing trough 5 exceeds the standard, it controls the sorting motor 13 to drive the worm gear 12 to rotate in the opposite direction and engage the worm gear 12 with the worm wheel 11. At the same time, the driving distributing wheel 4 drives the arc-shaped distributing trough 5 to rotate 180 degrees towards the circulating trough 9, so that the grain with excessive moisture content falls into the quantitative hopper 3 under the action of gravity. At the same time, the transmission component drives the guide plate 10 to deflect in the opposite direction to the distributing wheel 4, so that the guide plate 10 is installed at an angle inside the quantitative hopper 3, and guides the grain falling from the arc-shaped distributing trough 5 into the quantitative hopper 3 along the guiding slope of the guide plate 10 into the circulating trough 9, and then enters the circulating component through the circulating trough 9 to be lifted to the input end of the grain dryer for secondary drying;

[0050] While the transmission assembly drives the guide plate 10 to deflect, once the guide plate 10 contacts the inner wall of the metering bin 3, the toothless design of the polyurethane transmission belt 18, combined with its friction coefficient μ and the radii R of the first transmission wheel 16 and the second transmission wheel 17 satisfying μR≥T_max / F_N, allows slippage between the polyurethane transmission belt 18 and the first transmission wheel 16 and the second transmission wheel 17. This compensates for the difference in rotation angle between the separating wheel 4 and the guide plate 10, ensuring the stability and reliability of the transmission. This facilitates the classification and conveying of grain according to its moisture content and guides the grain to different processing paths, thereby optimizing the grain drying process.

[0051] like Figures 1-3 , Figure 7 As shown, the circulation assembly includes a circulation trough 19 opened at one end of the lower conveyor platform 1. The input end of the circulation trough 19 is connected to the output end of the circulation trough 9. The circulation auger 20 is rotatably connected inside the circulation trough 19. The top of the lower conveyor platform 1 is fixedly connected to the circulation motor 21. The output end of the circulation motor 21 is fixedly connected to the circulation auger 20. One end of the lower conveyor platform 1 is provided with a guide trough 22 that communicates with the inside of the circulation trough 19.

[0052] The feeding mechanism includes a cyclone separator 23 fixedly connected to one end of the lower conveyor platform 1. A fan 24 is fixedly connected to one end of the lower conveyor platform 1. The output end of the fan 24 is connected to the top air outlet of the cyclone separator 23 through a pipe. A cooling component is installed inside the cyclone separator 23.

[0053] Furthermore, the cooling assembly includes a spiral cooling trough 25 located inside the cyclone separator 23, a cooler 26 fixedly connected to one end of the lower conveyor platform 1, and a water pump 27 fixedly connected to one end of the lower conveyor platform 1. A spiral guide platform 28 is fixedly connected inside the cyclone separator 23. A collection box 39 is installed on one side of the lower conveyor platform 1 and is installed below the output end of the cyclone separator 23. A guide pipe 40 is fixedly connected to the output end of the spiral cooling trough 25 and is fixedly connected to the input end of the water pump 27. A guide pipe 41 is fixedly connected to the input end of the spiral cooling trough 25 and is fixedly connected to the output end of the cooler 26. A guide pipe 42 is fixedly connected to the input end of the cooler 26 and is fixedly connected to the output end of the water pump 27.

[0054] In operation, when the moisture sensor 6 of the monitoring system detects that the moisture content of the grain collected from the arc-shaped feed trough 5 reaches the preset standard and guides it into the cooling feed trough 8, the fan 24 is activated to draw the grain from the cooling feed trough 8 into the cyclone separator 23. Utilizing the principle of the cyclone separator, the heavier grain spirals down the inner wall of the cyclone separator 23, passes through the cyclone separator 23, and falls into the collection box 39 for collection. At the same time, lighter impurities such as dust contained in the grain are discharged with the air by the fan 24.

[0055] As the grain passes through the cyclone separator 23, a spiral guide platform 28 is positioned to guide its descent, causing it to spiral down its surface. This helps counteract some of the gravity, extending its time inside the cyclone separator 23. Simultaneously, a water pump 27 and a cooler 26 (using a Ferrotec TEC1-12706 kit) are activated. The water pump 27 draws refrigerant from the spiral cooling tank 25 through the guide pipe 42 into the cooler 26 for cooling. Subsequently, the cooled refrigerant from the cooler 26 passes through the guide pipe 41 into the spiral cooling tank 25, where it exchanges heat with the grain passing through the cyclone separator 23, achieving rapid cooling of the grain.

[0056] When the moisture sensor 6 of the monitoring system detects that the moisture content of the grain collected in the arc-shaped feeding trough 5 exceeds the standard, and the grain is introduced into the bottom of the circulating trough 19 through the circulating trough 9, the circulating motor 21 is started to drive the circulating auger 20 to rotate, pushing the grain at the bottom of the circulating trough 19 upward. When the grain moves upward along the length of the circulating trough 19 to one side of the guide trough 22, the grain slides down along the guide direction of the guide trough 22 under the action of gravity to the input port of the grain dryer for secondary drying.

[0057] like Figures 1-5 , Figure 8 As shown, the lower conveying bin 2 has an internal rotating connecting sleeve 30, the bottom of which is fixedly connected to an arc-shaped screen 31, and an internal rotating connecting inner rod 32, the bottom of which is fixedly connected to an arc-shaped screen 33. One end of the inner rod 32 passes through the inside of the sleeve 30 and is fixedly connected to a linkage assembly for driving the sleeve 30 and the inner rod 32 to deflect in opposite directions on the same axis.

[0058] The linkage assembly includes a bevel gear 34 fixedly connected to one end of the sleeve rod 30, a bevel gear 35 fixedly connected to one end of the inner rod 32, a bevel gear 36 rotatably connected to the outer side of the lower conveyor table 1, the bevel gear 36 being installed between the bevel gear 34 and the bevel gear 35 and meshing synchronously with the bevel gear 34 and the bevel gear 35, a bevel gear 37 fixedly connected to one end of the bevel gear 36, and a bevel gear 38 meshing with the bevel gear 37 fixedly connected to one end of the worm gear 12.

[0059] During operation, when the sorting motor 13 is started, it drives the worm gear 12 to mesh with the worm wheel 11, thereby driving the material distribution wheel 4 to rotate. The worm gear 12 also drives the bevel gear 5 38 to mesh with the bevel gear 4 37. This allows the bevel gear 4 37 to rotate synchronously with the bevel gear 36, which in turn meshes synchronously with the bevel gear 1 34 and the bevel gear 2 35, driving the bevel gear 1 34 and the bevel gear 2 35 to rotate synchronously in opposite directions. As a result, the bevel gear 1 34 and the bevel gear 2 35 drive the sleeve rod 30 and the inner rod 32 to rotate in opposite directions, while the sleeve rod 30 and the inner rod 32 drive the arc screen 1 31 and the arc screen 2 33 to deflect alternately. During the alternating deflection of the arc screen 1 31 and the arc screen 2 33, they intercept grain that passes through the grain dryer and falls into the lower conveyor bin 2, and disperse the intercepted grain during the deflection process, ensuring that the grain is evenly distributed and falls to the bottom of the lower conveyor bin 2. This process effectively reduces the accumulation of grain inside the lower conveyor bin 2, avoids the problem of heat and water vapor inside the grain not being able to be discharged in time, and improves the drying effect of the device.

[0060] A method for conveying grain in a grain dryer, the method comprising the following steps:

[0061] S1. Moisture detection and sorting transport

[0062] Moisture sensor 6 is activated to monitor the moisture content of the grain collected in the arc-shaped distribution trough 5 in real time. If the moisture content meets the standard, the classification motor 13 is triggered to run in the forward direction, driving the worm gear 12 to mesh with the worm wheel 11. If the moisture content exceeds the standard, it runs in the reverse direction. The distribution wheel 4 rotates 180 degrees to one side of the cooling trough 8 or the circulating trough 9 under the drive of the worm wheel 11, causing the arc-shaped distribution trough 5 to flip, so that the grain falls into the interior of the quantitative silo 3. At the same time, the polyurethane transmission belt 18 drives the guide plate 10 to deflect in the opposite direction to the distribution wheel 4, so that it tilts and fits against the inner wall of the quantitative silo 3, guiding the grain to slide along the inclined surface into the designated channel. Grain that meets the standard enters the cooling trough 8, and grain that exceeds the standard enters the circulating trough 9.

[0063] S2, Cooling and Impurity Separation

[0064] The fan 24 is started to draw the grain inside the cooling trough 8 into the cyclone separator 23. The grain falls slowly along the spiral guide table 28 to extend the heat dissipation time. The cooler 26 and water pump 27 are started to circulate the cooling medium through the spiral cooling trough 25 to the cyclone separator 23 to exchange heat with the grain and cool it down. The heavier grain falls into the collection box 39 to complete the cooling and collection, while the lighter dust is discharged with the airflow through the fan 24.

[0065] S3, Circulating Drying

[0066] Excessive grain is introduced into the bottom of the circulation tank 19 through the circulation trough 9. The circulation motor 21 is started to drive the circulation auger 20 to lift the grain to the input end of the dryer. The grain slides down to the dryer inlet through the guide trough 22 for secondary drying.

[0067] S4. Prevents accumulation and ensures uniform dispersion

[0068] While driving the worm gear 12 to rotate, it drives the bevel gear 5 38 to rotate, and at the same time drives the bevel gear 36 to drive the bevel gear 1 34 and bevel gear 2 35 to rotate in opposite directions, thereby causing the arc screen 1 31 and arc screen 2 33 to deflect alternately, intercepting and scattering the falling grain, ensuring that it is evenly distributed into the interior of the lower conveyor bin 2, so as to reduce the accumulation of grain and the resulting steam retention.

[0069] The working principle of the grain dryer conveying device and transmission method provided by the present invention is as follows:

[0070] First, the moisture sensor 6 is activated to monitor the moisture content of the grain collected in the arc-shaped distributing trough 5 in real time. The worm gear 12 is driven to rotate by the sorting motor 13, meshing with the worm wheel 11. Simultaneously, the worm wheel 11 drives the distributing wheel 4 to rotate 180 degrees towards the cooling trough 8 or the circulating trough 9, causing the distributing wheel 4 to rotate the arc-shaped distributing trough 5 to face the interior of the quantitative storage bin 3. Grain with moisture content within the standard range falls into the quantitative storage bin 3 under gravity. Simultaneously, the distributing wheel 4 drives the transmission wheel 17 to rotate synchronously, which in turn drives the transmission wheel 16 to rotate synchronously via the polyurethane transmission belt 18, meshing with the transmission gear 14. The transmission gear 15 then drives the guide plate 10 to deflect in the opposite direction to the distributing wheel 4, causing the top of the guide plate 10 to contact the inner wall of the quantitative storage bin 3, thus installing it at an angle inside the quantitative storage bin 3. In this way, the grain falling from the arc-shaped material distribution trough 5 into the quantitative bin 3 will slide down the guide slope of the guide plate 10 into the cooling trough 8 or the circulating trough 9, and then enter the feeding mechanism through the cooling trough 8 for cooling and discharge, or enter the circulating component to be lifted to the input end of the grain dryer for secondary drying.

[0071] After the grain is introduced into the cooling trough 8, the fan 24 is activated to draw the grain from the cooling trough 8 into the cyclone separator 23. Utilizing the principle of a cyclone separator, the heavier grain spirals down the inner wall of the cyclone separator 23, passing through the cyclone separator 23 and falling into the collection box 39 for collection. Simultaneously, lighter impurities such as dust contained in the grain are discharged with the air by the fan 24. During the process of the grain passing through the cyclone separator 23, a spiral guide platform 28 is set to guide the grain's descent path, causing the grain to spiral down its surface. This, combined with the water pump 27 and the cooler 26, circulates the refrigerant inside the spiral cooling tank 25 for cooling. This also facilitates heat exchange with the grain passing through the cyclone separator 23, achieving rapid cooling of the grain.

[0072] Then, after the grain is introduced into the bottom of the circulation trough 19 through the circulation trough 9, the circulation motor 21 is started to drive the circulation auger 20 to rotate, pushing the grain at the bottom of the circulation trough 19 upward. When the grain moves upward along the length of the circulation trough 19 to one side of the guide trough 22, the grain slides down into the grain dryer inlet under the guidance of gravity, and is dried for a second time.

[0073] Furthermore, when the sorting motor 13 starts and drives the worm gear 12 to mesh with the worm wheel 11, thereby driving the material distribution wheel 4 to rotate, the worm gear 12 also drives the bevel gear 5 38 to mesh with the bevel gear 4 37. This allows the bevel gear 4 37 to rotate synchronously with the bevel gear 36, which in turn causes the bevel gear 36 to mesh synchronously with the bevel gear 1 34 and the bevel gear 2 35, driving the bevel gear 1 34 and the bevel gear 2 35 to rotate synchronously in opposite directions. As a result, the bevel gear 1 34 and the bevel gear 2 35 drive the sleeve rod 30 and the inner rod 32 to rotate in opposite directions, while the sleeve rod 30 and the inner rod 32 drive the arc screen 1 31 and the arc screen 2 33 to deflect alternately. During the alternating deflection of the arc screen 1 31 and the arc screen 2 33, they intercept the grain that passes through the grain dryer and falls into the lower conveying bin 2, and disperse the intercepted grain during the deflection process, ensuring that the grain is evenly distributed and falls into the bottom of the lower conveying bin 2.

[0074] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A grain dryer conveying device, comprising a lower conveyor platform (1), characterized in that, The lower conveyor platform (1) has a lower conveyor bin (2) at the top and a metering bin (3) at the bottom of the lower conveyor bin (2). The metering bin (3) is rotatably connected to a material distribution wheel (4). One end of the material distribution wheel (4) is provided with an arc-shaped material distribution groove (5). The bottom of the arc-shaped material distribution groove (5) is fixedly connected to a moisture sensor (6). The bottom of the metering bin (3) has a discharge port (7). The bottom of the discharge port (7) is provided with a cooling material groove (8) and a circulating material groove (9). The metering bin (3) is hinged to a guide plate (10). The guide plate (10) is installed between the cooling material groove (8) and the circulating material groove (9). One end of the lower conveyor (1) is equipped with a drive assembly for driving the material distribution wheel (4) to rotate, and one end of the lower conveyor (1) is equipped with a transmission assembly for driving the guide plate (10) to deflect. The output end of the circulating trough (9) is equipped with a circulation assembly for guiding the grain to circulate and dry. One end of the cooling trough (8) is equipped with a feeding mechanism for cooling the grain. The drive assembly includes a worm gear (11) fixedly connected to one end of the material distribution wheel (4), a worm (12) meshing with the worm gear (11) is rotatably connected to the outer side of the lower conveyor platform (1), a sorting motor (13) is fixedly connected to the outer side of the lower conveyor platform (1), the output end of the sorting motor (13) is fixedly connected to the worm (12), and the sorting motor (13) is electrically connected to the moisture sensor (6). Furthermore, the transmission assembly includes a transmission gear one (14) rotatably connected to the outside of the lower conveyor (1), a transmission gear two (15) meshing with the transmission gear one (14) fixedly connected to the hinge end of the guide plate (10), a transmission wheel one (16) fixedly connected to one end of the transmission gear one (14), a transmission wheel two (17) fixedly connected to one end of the material distribution wheel (4), and a polyurethane transmission belt (18) sleeved around the transmission wheel two (17) and the transmission wheel one (16), which is a toothless design; the transmission gear two (15) drives the guide plate (10) to deflect in the opposite direction to the material distribution wheel (4); Furthermore, the lower conveying bin (2) is internally connected to a rotating sleeve rod (30), the bottom of which is fixedly connected to an arc-shaped screen (31), and the lower conveying bin (2) is internally connected to an inner rod (32), the bottom of which is fixedly connected to an arc-shaped screen (33). One end of the inner rod (32) passes through the inside of the sleeve rod (30) and is fixedly connected to a linkage assembly for driving the sleeve rod (30) and the inner rod (32) to deflect in opposite directions on the same axis. While the sleeve rod (30) and the inner rod (32) deflect in opposite directions on the same axis, the arc-shaped screen (31) and the arc-shaped screen (33) are driven to disperse the intercepted grain, ensuring that the grain is evenly dispersed and falls into the bottom of the lower conveying bin (2). Furthermore, the linkage assembly includes a bevel gear one (34) fixedly connected to one end of the sleeve rod (30), a bevel gear two (35) fixedly connected to one end of the inner rod (32), a bevel gear three (36) rotatably connected to the outer side of the lower conveyor table (1), the bevel gear three (36) being installed between the bevel gear one (34) and the bevel gear two (35) and meshing synchronously with the bevel gear one (34) and the bevel gear two (35), a bevel gear four (37) fixedly connected to one end of the bevel gear three (36), and a bevel gear five (38) meshing with the bevel gear four (37) fixedly connected to one end of the worm gear (12).

2. The grain dryer conveying device according to claim 1, characterized in that, The friction coefficient μ of the polyurethane transmission belt (18) satisfies μR≥T_max / F_N with the radius R of transmission wheel one (16) and transmission wheel two (17), where T_max is the maximum allowable torque of the system and F_N is the normal pressure of the pulley on the transmission belt.

3. The grain dryer conveying device according to claim 1, characterized in that, The circulation assembly includes a circulation trough (19) at one end of the lower conveyor platform (1), the input end of the circulation trough (19) is connected to the output end of the circulation trough (9), the inside of the circulation trough (19) is rotatably connected to a circulation auger (20), the top of the lower conveyor platform (1) is fixedly connected to a circulation motor (21), the output end of the circulation motor (21) is fixedly connected to the circulation auger (20), and one end of the lower conveyor platform (1) is provided with a guide trough (22) that communicates with the inside of the circulation trough (19).

4. The grain dryer conveying device according to claim 1, characterized in that, The feeding mechanism includes a cyclone separator (23) fixedly connected to one end of the lower conveyor platform (1). A fan (24) is fixedly connected to one end of the lower conveyor platform (1). The output end of the fan (24) is connected to the top air outlet of the cyclone separator (23) through a pipe. A cooling component is installed inside the cyclone separator (23).

5. A grain dryer conveying device according to claim 4, characterized in that, The cooling assembly includes a spiral cooling trough (25) opened inside the cyclone separator (23), a cooler (26) is fixedly connected to one end of the lower conveyor (1), and a water pump (27) is fixedly connected to one end of the lower conveyor (1). A spiral guide platform (28) is fixedly connected inside the cyclone separator (23). A collection box (39) is installed on one side of the lower conveyor (1). The collection box (39) is installed below the output end of the cyclone separator (23). A guide pipe (40) is fixedly connected to the output end of the spiral cooling trough (25). The first guide pipe (40) is fixedly connected to the input end of the water pump (27), the second guide pipe (41) is fixedly connected to the input end of the spiral cooling tank (25), the second guide pipe (41) is fixedly connected to the output end of the cooler (26), the input end of the cooler (26) is fixedly connected to the third guide pipe (42), and the third guide pipe (42) is fixedly connected to the output end of the water pump (27).

6. A conveying method for a grain dryer, characterized in that, This method is applicable to a grain dryer conveying device according to any one of claims 1-5, and the method includes the following steps: S1. Moisture detection and sorting transport The moisture sensor (6) is activated to monitor the moisture content of the grain collected in the arc-shaped distribution trough (5) in real time. If the moisture content meets the standard, the classification motor (13) is triggered to run in the forward direction, driving the worm (12) to mesh with the worm wheel (11). If the moisture content exceeds the standard, it runs in the reverse direction. The distribution wheel (4) rotates 180 degrees to the side of the cooling trough (8) or the circulating trough (9) under the drive of the worm wheel (11), causing the arc-shaped distribution trough (5) to flip, so that the grain falls into the interior of the quantitative bin (3). At the same time, the guide plate (10) and the distribution wheel (4) are driven to deflect in the opposite direction through the polyurethane transmission belt (18), so that they are tilted and attached to the inner wall of the quantitative bin (3), guiding the grain to slide along the slope into the designated channel. The grain that meets the standard enters the cooling trough (8), and the grain that exceeds the standard enters the circulating trough (9). S2, Cooling and Impurity Separation Start the fan (24) to suck the grain inside the cooling trough (8) into the cyclone separator (23). The grain slowly falls along the spiral guide platform (28) to extend the heat dissipation time. Start the refrigerator (26) and water pump (27) to circulate the cooling medium through the spiral cooling trough (25) to the cyclone separator (23) to exchange heat with the grain and cool it down. The heavier grain falls into the collection box (39) to complete the cooling and collection, and the lighter dust is discharged by the fan (24) with the airflow. S3, Circulating Drying Excess grain is introduced into the bottom of the circulating tank (19) through the circulating trough (9), and the circulating motor (21) is started to drive the circulating auger (20) to lift the grain to the input end of the dryer. The grain slides down to the inlet of the dryer through the guide trough (22) for secondary drying. S4. Prevents accumulation and ensures uniform dispersion While driving the worm gear (12) to rotate, it drives the bevel gear five (38) to rotate, and at the same time drives the bevel gear three (36) to drive the bevel gear one (34) and bevel gear two (35) to rotate in opposite directions, thereby causing the arc screen one (31) and arc screen two (33) to deflect alternately, intercepting and scattering the falling grain, ensuring that it is evenly distributed to the interior of the lower conveying bin (2), so as to reduce the accumulation of grain and the resulting steam retention.

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