Full-automatic tower type three-stage dryer

Abstract

The invention belongs to the technical field of dryers, and particularly relates to a full-automatic tower type three-stage dryer which comprises a rack, the outer wall of the top of the rack is fixedly connected with a feeding bin, a strong wind dehumidification bin, a preheating bin and a drying bin, and the outer wall of the bottom of the feeding bin is fixedly communicated with the outer wall of the top of the strong wind dehumidification bin; the outer wall of the bottom of the strong wind dehumidification bin fixedly communicates with the outer wall of the top of the preheating bin, the outer wall of the bottom of the preheating bin fixedly communicates with the outer wall of the top of the drying bin, and the outer wall of one side of the feeding bin fixedly communicates with a feeding valve port. A hot air inlet and a hot air outlet are formed in the outer walls of the two sides of the strong wind dehumidification bin, the preheating bin and the drying bin correspondingly, a closed air energy heat pump is installed on one side of the rack, the function only used for heating wind originally is applied to dehumidification and heating through application of the closed air energy heat pump, the conversion rate of energy consumption is increased, and the energy utilization rate is increased. And meanwhile, the drying efficiency is improved, and the advantages of reducing cost and improving efficiency are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of dryers, and in particular relates to a fully automatic tower-type three-stage dryer. Background Art

[0002] The three-stage tower dryer is a tower-type equipment used for drying materials such as grains and medicinal materials. It achieves efficient dehydration through three drying stages. Its core structure includes the drying tower body, hot air circulation system and control system. It is suitable for processing materials with high moisture content and can ensure drying uniformity and product quality.

[0003] For example, a tower grain dryer disclosed by national patent publication No. CN206847315U includes a tower body, a grain storage bin, a No. 1 drying bin, a slow-recovery bin and a cooling bin, wherein a grain storage bin is arranged inside the tower body, an observation window is arranged on one side of the grain storage bin, a No. 1 drying bin is connected to the bottom of the grain storage bin, an air inlet is arranged on one side of the No. 1 drying bin, one end of the air inlet is threadedly connected to an air duct, a No. 2 drying bin is connected to the bottom of the No. 1 drying bin, a slow-recovery bin is connected to the bottom of the No. 2 drying bin, a humidity sensor is arranged on one side of the slow-recovery bin, a humidity sensor is arranged on one side of the slow-recovery bin, a dust removal pipe is arranged below the slow-recovery bin, a dust removal pipe is arranged below the cooling bin, one end of the dust removal pipe is connected to a dust collector, and the other end of the dust removal pipe is connected to a dust outlet, a grain unloading bin is arranged below the dust removal pipe, and the lower end of the grain unloading bin is connected to a grain outlet. By arranging two groups of drying devices in the tower body and arranging the humidity sensor and the dust removal device at the same time, the drying effect of the grain can be enhanced.

[0004] However, the conventional device still has the following problems when used:

[0005] Traditional dryers have a small space for rapeseed to contact the air and consume a lot of heat energy, which increases the input cost. We need a drying tower that can better utilize heat energy to reduce input costs, while improving drying efficiency and achieving cost reduction and efficiency improvement. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a fully automatic tower-type three-stage dryer, which has the advantages of being able to better utilize heat energy to reduce input costs, while improving drying efficiency and achieving cost reduction and efficiency improvement.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a fully automatic tower-type three-stage dryer, comprising a frame, the top outer walls of the frame are fixedly connected with a feeding bin, a strong wind dehumidification bin, a preheating bin and a drying bin, the bottom outer wall of the feeding bin is fixedly connected to the top outer wall of the strong wind dehumidification bin, the bottom outer wall of the strong wind dehumidification bin is fixedly connected to the top outer wall of the preheating bin, the bottom outer wall of the preheating bin is fixedly connected to the top outer wall of the drying bin, one side outer wall of the feeding bin is fixedly connected to a material inlet valve, the outer walls on both sides of the strong wind dehumidification bin, the preheating bin and the drying bin are respectively provided with a hot air inlet and a Hot air outlet, a closed air energy heat pump is installed on one side of the frame, the hot air outlet of the closed air energy heat pump is fixedly connected to a hot air duct, the outer wall of the hot air duct at one end away from the closed air energy heat pump is communicated with the hot air inlet of the drying bin, the hot air outlet of the drying bin is fixedly connected to a connecting air duct, the outer wall of the connecting air duct at one end away from the drying bin is communicated with the hot air inlet of the preheating bin, a booster fan is fixedly installed on the inner wall of the connecting air duct, the hot air outlet of the preheating bin is fixedly connected to a return air duct, and the outer wall of the return air duct at one end away from the preheating bin is communicated with the hot air inlet of the closed air energy heat pump.

[0008] Preferably, the bottom outer wall of the drying bin is fixedly connected to a discharge cooling bin, and the bottom outer wall of the discharge cooling bin is fixedly connected to a discharge valve port. The feeding bin is loaded with rapeseed, which flows through the strong wind dehumidification bin, preheating bin, drying bin, and discharge cooling bin in sequence and is discharged from the discharge valve port.

[0009] Preferably, the hot air inlet of the strong wind dehumidification chamber is fixedly connected to a dustproof plate, and the hot air outlet of the strong wind dehumidification chamber is fixedly installed with a powerful fan.

[0010] Preferably, the inner walls of the strong wind dehumidification bin, preheating bin and drying bin are fixedly installed with multiple rows of front baffles, and both ends of the outer wall of one side of the front baffle are fixedly installed with flat orifice plates, and the end of the flat orifice plate away from the front baffle is fixedly connected to the rear baffle, and the rear baffle is staggered with the front baffle, and the multiple rows of flat orifice plates of the strong wind dehumidification bin, preheating bin and drying bin are fixedly connected at both ends.

[0011] Preferably, breathable ventilation screens are fixedly mounted on both side outer walls of the planar perforated plate, and interlayer bottom plates are fixedly mounted on the upper and lower outer walls of each bin.

[0012] Preferably, a bidirectional running motor is fixedly connected to an outer wall of one side of the rear baffle, the axis of the bidirectional running motor is fixedly connected to a connecting gear 1, the top outer wall of the interlayer bottom plate is rotatably connected to a row of double-layer connecting ring plates, the outer wall of one of the double-layer connecting ring plates is fixedly connected to a connecting gear 2, the connecting gear 2 is meshed and connected to the outer wall of the connecting gear 1, and the outer walls of adjacent double-layer connecting ring plates are meshed and rotatably connected with a connecting belt.

[0013] Preferably, the top outer wall of the connecting belt is fixedly connected to a bidirectional threaded rod, the outer wall of the bidirectional threaded rod is provided with a connecting block, the inner wall of the connecting block is provided with a connecting through hole connected up and down, the inner wall of the connecting through hole is slidingly connected to the outer wall of the bidirectional threaded rod, and the inner wall of the connecting block is rotatably installed with an engaging slider, and the outer wall of the engaging slider is engaged with the inner wall of the bidirectional threaded rod.

[0014] Preferably, one side outer wall of the connecting block is rotatably connected to a rotating shaft, one side outer wall of the rotating shaft is fixedly connected to a rubber pick, one side outer wall of the rotating shaft is fixedly installed with a movable plate, one side outer wall of the rear baffle is fixedly installed with a rack, one side outer wall of the movable plate is meshed with one side outer wall of the rack, and the outer wall of one end of the rubber pick away from the rotating shaft is movably fitted with the outer wall of the plane orifice plate.

[0015] Preferably, the outer walls at both ends of the rotating shaft are rotatably mounted with valve bottom plates, and the upper and lower outer walls of the valve bottom plates are fixedly connected to limit frames, and the outer walls on both sides of the limit frames are movably fitted with the outer walls on both sides of the plane orifice plate, and the outer walls of the limit frames at both ends are fixedly connected with the same limit rod, and the outer wall of the limit rod is movably fitted with the outer wall of the rubber paddle.

[0016] Preferably, the bottom inner wall of the flat orifice plate in the drying chamber is fixedly connected to the valve bottom plate, the bottom outer wall of the interlayer bottom plate is fixedly installed with an adjustment guide rail, one end outer wall of the adjustment guide rail is fixedly installed, the outer wall of the adjustment guide rail is slidably connected to a movable plate, the top outer wall of the movable plate is movably fitted with the bottom outer wall of the valve bottom plate, and the valve bottom plate and the movable plate are both provided with the same rack in an array.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, the flow of rapeseed is gravity flow, which saves energy consumption. After the preheating chamber and the drying chamber are connected by pipes, they are in a nearly sealed state, which reduces the loss of heat energy and saves more energy consumption. Through the application of a closed air-to-air heat pump, the function originally used only for heating air is used for dehumidification and heating, which improves the conversion rate of energy consumption, makes better use of heat energy to reduce input costs, and improves drying efficiency at the same time, achieving the advantages of reducing costs and increasing efficiency.

[0019] 2. After a long period of operation, the present invention will inevitably cause dust to hang on the wall due to the continuous falling of rapeseed, and the flow of hot air will further increase the dust phenomenon. Since the traditional drying tower is difficult to maintain internally, the pores of the flat orifice plate will be easily blocked, affecting the drying efficiency. In the present invention, by starting a bidirectional motor, using a double-layer connecting ring plate and a connecting belt, multiple bidirectional threaded rods are driven to rotate. At this time, the connecting block will be vertically reciprocated by the rotation of the bidirectional threaded rod, and the meshing connection between the movable plate and the rack causes the rubber paddle to rotate with the rotating shaft as the axis when the connecting block moves. In the present invention, the height of the rubber paddle is higher than the distance between the rotating shaft and the limit lever, and it has high resilience. When the rotating shaft rotates, the outer wall on one side of the top of the rotating shaft will hit the outer wall of the limit lever to cause deformation. After the rotating shaft reaches a sufficient rotation angle, the limit lever that is completely pressed and deformed will break away from the limit lever and rebound quickly, hitting the outer wall of the flat orifice plate on one side. The kinetic energy of this hitting is used to drive wind energy to knock down the dust in the pores at the hit location, thereby ensuring the drying efficiency of the present invention. By using this device, automatic maintenance of the flat orifice plate in the drying tower can be achieved at all times without manual timed monitoring, thereby improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall front view structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention in the upper right direction.

[0022] Figure 3 It is a schematic diagram of the overall structure of the present invention in the upper left direction.

[0023] Figure 4 This is a schematic diagram of the internal top view of the preheating chamber of the present invention.

[0024] Figure 5 Schematic diagram of the internal air flow structure of the preheating chamber of the present invention.

[0025] Figure 6 It is a side structural schematic diagram of the preheating chamber of the present invention.

[0026] Figure 7 This is a schematic diagram of the bidirectional threaded rod structure from a side view of the preheating chamber of the present invention.

[0027] Figure 8 for Figure 7 A magnified schematic diagram of the structure at point A.

[0028] Figure 9 for Figure 7 A magnified schematic diagram of the structure at point B.

[0029] Figure 10 It is a schematic diagram of the valve bottom plate structure of the present invention.

[0030] Figure: 1. Frame; 2. Feeding bin; 3. Strong air dehumidification bin; 4. Preheating bin; 5. Drying bin; 6. Discharge cooling bin; 7. Connecting air duct; 8. Booster fan; 9. Return air duct; 10. Hot air duct; 11. Closed air-to-energy heat pump; 12. Front baffle; 13. Flat orifice plate; 14. Rear baffle; 15. Bidirectional motor; 16. Connecting gear 1; 17. Double-layer connecting ring plate; 18. Connecting gear 2. 19. Connecting belt; 20. Bidirectional threaded rod; 21. Connecting block; 22. Connecting through hole; 23. Rotating shaft; 24. Rubber paddle; 25. Limiting lever; 26. Limiting frame; 27. Valve bottom plate; 28. Movable plate; 29. ​​Rack; 30. Adjusting guide rail; 31. Actuator; 32. Inlet valve port; 33. Dustproof plate; 34. Powerful fan; 35. Interlayer bottom plate; 36. Ventilation screen; 37. Outlet valve port. DETAILED DESCRIPTION

[0031] In order to clearly and completely describe the objectives and technical solutions of the present invention and make its advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] For example 1, please refer to Figures 1 to 10The present invention provides a technical solution: a fully automatic tower-type three-stage dryer, comprising a frame 1, characterized in that: the top outer wall of the frame 1 is fixedly connected with a feeding bin 2, a strong wind dehumidification bin 3, a preheating bin 4 and a drying bin 5, the bottom outer wall of the feeding bin 2 is fixedly connected to the top outer wall of the strong wind dehumidification bin 3, the bottom outer wall of the strong wind dehumidification bin 3 is fixedly connected to the top outer wall of the preheating bin 4, the bottom outer wall of the preheating bin 4 is fixedly connected to the top outer wall of the drying bin 5, one side outer wall of the feeding bin 2 is fixedly connected with a material inlet valve port 32, the strong wind dehumidification bin 3, the preheating bin 4 and the drying bin 5 are fixedly connected. The outer walls on both sides of the warehouse 5 are respectively provided with a hot air inlet and a hot air outlet. A closed air energy heat pump 11 is installed on one side of the frame 1. The hot air outlet of the closed air energy heat pump 11 is fixedly connected to a hot air pipe 10. The outer wall of the hot air pipe 10 at one end away from the closed air energy heat pump 11 is connected to the hot air inlet of the drying warehouse 5. The hot air outlet of the drying warehouse 5 is fixedly connected to a connecting ventilation pipe 7. The outer wall of the connecting ventilation pipe 7 at one end away from the drying warehouse 5 is connected to the hot air inlet of the preheating warehouse 4. A booster fan 8 is fixedly installed on the inner wall of the connecting ventilation pipe 7. The hot air outlet of the preheating warehouse 4 is fixedly connected to The return air duct 9, the outer wall of one end of the return air duct 9 away from the preheating bin 4 is connected to the hot air inlet of the closed air energy heat pump 11, the bottom outer wall of the drying bin 5 is fixedly connected to the discharge cooling bin 6, the bottom outer wall of the discharge cooling bin 6 is fixedly connected to the discharge valve 37, the feeding bin 2 is loaded with rapeseed, and the rapeseed passes through the strong wind dehumidification bin 3, the preheating bin 4, the drying bin 5, and the discharge cooling bin 6 in turn and is discharged from the discharge valve 37, the hot air inlet of the strong wind dehumidification bin 3 is fixedly connected to the dustproof plate 33, the hot air outlet of the strong wind dehumidification bin 3 is fixedly installed with a strong fan 34, the strong wind dehumidification bin 3. The inner walls of the preheating bin 4 and the drying bin 5 are fixedly installed with multiple rows of front baffles 12, and both ends of the outer wall of one side of the front baffle 12 are fixedly installed with flat orifice plates 13. The end of the flat orifice plate 13 away from the front baffle 12 is fixedly connected to the rear baffle 14, and the rear baffle 14 is staggered with the front baffle 12. The upper and lower ends of the multiple rows of flat orifice plates 13 in the strong wind dehumidification bin 3, the preheating bin 4 and the drying bin 5 are fixedly connected, and the outer walls on both sides of the flat orifice plates 13 are fixedly installed with breathable ventilation screens 36, and the upper and lower outer walls of each bin are fixedly installed with interlayer bottom plates 35.

[0033] In the present invention, rapeseed enters the gravity flow channel of the strong wind dehumidification bin 3 from the feeding bin 2. The gravity flow channel is formed by a flat orifice plate 13, which is air-permeable but not permeable to rapeseed. At this time, the strong fan 34 draws in natural wind to dry the water on the surface of the rapeseed. After entering from the air inlet, the air enters the air inlet air cavity, passes through the orifice plate, and penetrates the rapeseed layer to the air outlet air cavity. Because natural wind cannot dry rapeseed with a low moisture content, in the present invention, a grain moisture meter is fixedly installed inside the feeding bin. The grain moisture meter is a conventional device available on the market. When the moisture content of the rapeseed is greater than 20%, the strong fan is automatically turned on, and when the moisture content of the rapeseed is less than 20%, the strong fan is automatically turned off.

[0034] In the present invention, rapeseed enters the strong wind dehumidification bin 3 from the feeding bin 2 in the gravity flow channel, and the booster fan 8 sends the sub-hot air in the drying bin 5 into the preheating bin 4 through the connecting air duct 7. The air at this time is the air after the rapeseed is dried in the drying bin 5, and the temperature is lower than that of the drying bin 5, so it can achieve a better preheating effect. The air at this time is low-temperature and high-humidity because it is mixed with moisture in the rapeseed. The wind passes through the air outlet of the preheating bin 4 and then enters through the return air port of the closed air energy heat pump 11. It is first cooled and dehumidified by the evaporator fins of the closed air energy heat pump 11, and then the air is heated by the condenser fins of the closed air energy heat pump 11. The air at this time is high-temperature and low-humidity, and enters the air inlet of the drying bin 5 through the hot air outlet through the hot air duct 10, and finally out of the drying bin 5 outlet. The sub-hot air at this time is sent to the preheating bin 4 through the connecting air duct 7 and the booster fan 8 to complete the whole cycle.

[0035] In the present invention, the flow of rapeseed is gravity flow, which saves energy consumption, and after the preheating chamber 4 and the drying chamber 5 are connected by pipes, they are in a nearly sealed state, which reduces the loss of heat energy and saves more energy consumption; through the application of the closed air energy heat pump 11, the function originally used only for heating air is used for dehumidification and heating, which improves the conversion rate of energy consumption, makes better use of heat energy to reduce input costs, and improves drying efficiency at the same time, achieving the advantages of reducing costs and increasing efficiency.

[0036] Embodiment 2, on the basis of embodiment 1, one side outer wall of the rear baffle 14 is fixedly connected with a bidirectional running motor 15, the axis of the bidirectional running motor 15 is fixedly connected with a connecting gear 16, the top outer wall of the interlayer bottom plate 35 is rotatably connected with a row of double-layer connecting ring plates 17, the outer wall of one of the double-layer connecting ring plates 17 is fixedly connected with a connecting gear 2 18, the connecting gear 2 18 is meshed and connected with the outer wall of the connecting gear 1 16, the outer walls of the adjacent double-layer connecting ring plates 17 are meshed and rotated with a connecting belt 19, the top outer walls of the connecting belt 19 are fixedly connected with a bidirectional threaded rod 20, the outer wall of the bidirectional threaded rod 20 is provided with a connecting block 21, the inner wall of the connecting block 21 is provided with a connecting through hole 22 connected up and down, the inner wall of the connecting through hole 22 is slidably connected with the outer wall of the bidirectional threaded rod 20, the inner wall of the connecting block 21 is rotatably installed with an engaging slider, meshing The outer wall of the slider is meshed with the inner wall of the bidirectional threaded rod 20, and the outer wall of one side of the connecting block 21 is rotatably connected to the rotating shaft 23, and the outer wall of one side of the rotating shaft 23 is fixedly connected to a rubber paddle 24, and a movable plate 28 is fixedly installed on the outer wall of one side of the rotating shaft 23, and a rack 29 is fixedly installed on the outer wall of one side of the rear baffle 14. The outer wall of one side of the movable plate 28 is meshed with the outer wall of one side of the rack 29, and the outer wall of one end of the rubber paddle 24 away from the rotating shaft 23 is movably fitted with the outer wall of the plane orifice plate 13. The outer walls of the upper and lower ends of the valve bottom plate 27 are fixedly connected to the limiting frame 26, and the outer walls of the two side walls of the limiting frame 26 are movably fitted with the outer walls of the two side walls of the plane orifice plate 13. The outer walls of the limiting frames 26 at both ends are fixedly connected to the same limiting rod 25, and the outer wall of the limiting rod 25 is movably fitted with the outer wall of the rubber paddle 24.

[0037] After a long period of operation, the present invention will inevitably cause dust to hang on the wall due to the continuous falling of rapeseed, and the flow of hot air will further increase the dust phenomenon. Since the traditional drying tower is difficult to maintain internally, the pores of the plane orifice plate 13 will be easily blocked, affecting the drying efficiency. In the present invention, by starting the bidirectional operation motor 15, the double-layer connecting ring plate 17 and the connecting belt 19 are used to drive multiple bidirectional threaded rods 20 to rotate. At this time, the connecting block 21 will be vertically reciprocated by the rotation of the bidirectional threaded rod 20, and the meshing connection between the movable plate 28 and the rack 29 causes the rubber paddle 24 to rotate with the rotating shaft 23 as the axis when the connecting block 21 moves. In the present invention, the height of the rubber paddle 24 is higher than the distance between the rotating shaft 23 and the limit block rod 25, and it has high resilience. When the rotating shaft 23 rotates, the outer wall of the top side of the rotating shaft 23 will press against the outer wall of the limit block rod 25 to cause deformation. After the rotating shaft 23 reaches a sufficient rotation angle, the limit block rod 25 that is completely pressed and deformed will break away from the limit block rod 25 and rebound quickly, hitting the outer wall of the flat orifice plate 13 on one side. The kinetic energy of this hitting is used to drive wind energy to knock down the dust in the pores at the hit location, thereby ensuring the drying efficiency of the present invention. By using this device, automatic maintenance of the flat orifice plate 13 in the drying tower can be achieved at all times without manual regular monitoring, thereby improving the drying efficiency.

[0038] Example three, based on Example one, the bottom inner wall of the flat orifice plate 13 in the drying chamber 5 is fixedly connected to the valve bottom plate 27, the bottom outer wall of the interlayer bottom plate 35 is fixedly installed with an adjustment guide rail 30, and one end outer wall of the adjustment guide rail 30 is fixedly installed with 31, and the outer wall of the adjustment guide rail 30 is slidably connected to the movable plate 28, and the top outer wall of the movable plate 28 is movably fitted with the bottom outer wall of the valve bottom plate 27, and the valve bottom plate 27 and the movable plate 28 are both provided with the same rack 29 in an array.

[0039] In the present invention, the valve bottom plate 27 and the movable plate 28 are tightly attached to each other, and there are corresponding holes on the two plates. When the rapeseed passes through, 31 is connected to the movable plate 28 and moves forward or backward to form a circulating plane valve group. When the hole of the valve bottom plate 27 and the hole of the movable plate 28 coincide, the valve is in the open state. When the hole of the valve bottom plate 27 and the hole of the movable plate 28 are staggered, the valve is in the closed state. 31 is connected to a remote control computer, which controls the valve to open or close according to the set parameters and duration. The individual valves of the circulating plane valve group can be closed and opened separately, thereby better controlling the flow rate of the rapeseed in the gravity channel. A grain moisture meter is set in the discharge cooling bin 6. By measuring the moisture content of the rapeseed after drying, the data is transmitted back to the control computer, which controls the valve opening or closing time, automatically adjusting the rapeseed flow rate in the gravity channel, and better achieving the drying effect.

[0040] The working principle and use process of the present invention: In the present invention, the rapeseed enters the gravity flow channel of the strong wind dehumidification bin 3 from the feeding bin 2. The gravity flow channel is formed by a flat orifice plate 13, which is air-permeable but not permeable to the rapeseed. At this time, the strong fan 34 draws in natural wind to dry the water on the surface of the rapeseed. After coming in from the air inlet, the air enters the air inlet air cavity, passes through the orifice plate, and penetrates the rapeseed layer to the air outlet air cavity, because natural wind can no longer dry the rapeseed with a low moisture content. In the present invention, a grain moisture meter is fixedly installed inside the feeding bin. The grain moisture meter is a conventional device available on the market. When the moisture content of the rapeseed is greater than 20%, the strong fan is automatically turned on, and when the moisture content of the rapeseed is less than 20%, the strong fan is automatically turned off. In the present invention, the rapeseed enters the strong wind dehumidification bin 3 from the feeding bin 2 in the gravity flow channel, and the booster fan 8 sends the sub-hot air in the drying bin 5 into the preheating bin 4 through the connecting air duct 7. At this time The air is the wind after the rapeseed is dried in the drying chamber 5, and its temperature is lower than that of the drying chamber 5, so it can achieve a better preheating effect. The air at this time is low temperature and high humidity because it is mixed with moisture in the rapeseed. The wind passes through the air outlet of the preheating chamber 4, and then enters through the return air port of the closed air energy heat pump 11. It is first cooled and dehumidified by the evaporator fins of the closed air energy heat pump 11, and then the air is heated by the fins of the condenser of the closed air energy heat pump 11. At this time, the air is high temperature and low humidity, and is discharged from the hot air outlet through the hot air pipe 10 into the air inlet of the drying chamber 5, and finally discharged from the drying chamber 5 outlet. The second hot air at this time is sent to the preheating chamber 4 through the connecting air pipe 7 and the booster fan 8 to complete the whole cycle. In the present invention, the flow of rapeseed is gravity flow, which saves energy consumption, and after the preheating chamber 4 and the drying chamber 5 are connected by a pipeline, they are in a nearly sealed state, which reduces the loss of heat energy and saves more energy consumption.By applying the closed air energy heat pump 11, the function originally used only for heating air is used for dehumidification and heating, thereby improving the conversion rate of energy consumption, making better use of heat energy to reduce input costs, and improving drying efficiency at the same time, achieving the advantages of cost reduction and efficiency improvement. After working for a long time, the present invention will inevitably cause dust to hang on the wall due to the continuous falling of rapeseed, and the flow of hot air will further increase the dust phenomenon. Since the traditional drying tower is difficult to maintain the interior, the air holes of the flat orifice plate 13 will be easily blocked, affecting the drying efficiency. In the present invention, by starting the bidirectional running motor 15, the double-layer connecting ring plate 17 and the connecting belt 19 are used to drive multiple bidirectional threaded rods 20 to rotate. At this time, the connecting block 21 will be vertically reciprocated by the rotation of the bidirectional threaded rod 20, and the meshing connection between the movable plate 28 and the rack 29 causes the rubber paddle 24 to rotate with the rotating shaft 23 as the axis when the connecting block 21 moves. In the present invention, the height of the rubber paddle 24 is higher than the rotating shaft 23. The distance between the rotating shaft 23 and the limit stop bar 25 is higher, and it has high resilience. When the rotating shaft 23 rotates, the outer wall of the top side of the rotating shaft 23 will hit the outer wall of the limit stop bar 25 to cause deformation. After the rotating shaft 23 reaches a sufficient rotation angle, the limit stop bar 25 that is completely pressed and deformed will break away from the limit stop bar 25 and rebound quickly, hitting the outer wall of the flat orifice plate 13 on one side. The kinetic energy of this hitting drives the wind energy to knock down the dust in the pores at the hit position, thereby ensuring the drying efficiency of the present invention. Using this device, To achieve full-time automatic maintenance of the flat orifice plate 13 in the drying tower, eliminating the need for manual, timed monitoring and improving drying efficiency, the present invention places the valve bottom plate 27 and the movable plate 28 in close contact with each other, with corresponding holes on the two plates. When the rapeseed passes through, valve 31 connects to the movable plate 28 and moves forward or backward to form a circulating flat valve group. When the holes in the valve bottom plate 27 and the movable plate 28 overlap, the valve is open; when the holes in the valve bottom plate 27 and the movable plate 28 are offset, the valve is closed. Valve 31 is connected to a remote control computer, which controls the valve opening or closing according to pre-set parameters and duration. Individual valves in the circulating flat valve group can be opened and closed independently, thereby better controlling the flow rate of the rapeseed in the gravity channel. A grain moisture meter is installed in the discharge cooling bin 6 to measure the moisture content of the rapeseed after drying and transmit the data back to the control computer. The control computer then controls the valve opening or closing duration, automatically adjusting the rapeseed flow rate in the gravity channel to achieve a better drying effect.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fully automatic tower-type three-stage drying machine, comprising a frame (1), characterized in that: The top outer wall of the frame (1) is fixedly connected with a feeding bin (2), a strong wind dehumidification bin (3), a preheating bin (4) and a drying bin (5); the bottom outer wall of the feeding bin (2) is fixedly connected to the top outer wall of the strong wind dehumidification bin (3); the bottom outer wall of the strong wind dehumidification bin (3) is fixedly connected to the top outer wall of the preheating bin (4); the bottom outer wall of the preheating bin (4) is fixedly connected to the top outer wall of the drying bin (5); one side outer wall of the feeding bin (2) is fixedly connected to a feed valve port (32); the two side outer walls of the strong wind dehumidification bin (3), the preheating bin (4) and the drying bin (5) are respectively provided with a hot air inlet and a hot air outlet; a closed air energy heat exchanger is installed at one side of the frame (1). The hot air outlet of the closed air energy heat pump (11) is fixedly connected to a hot air pipe (10), and the outer wall of the hot air pipe (10) at one end away from the closed air energy heat pump (11) is connected to the hot air inlet of the drying chamber (5). The hot air outlet of the drying chamber (5) is fixedly connected to a connecting air pipe (7), and the outer wall of the connecting air pipe (7) at one end away from the drying chamber (5) is connected to the hot air inlet of the preheating chamber (4). A booster fan (8) is fixedly installed on the inner wall of the connecting air pipe (7). The hot air outlet of the preheating chamber (4) is fixedly connected to a return air pipe (9), and the outer wall of the return air pipe (9) at one end away from the preheating chamber (4) is connected to the hot air inlet of the closed air energy heat pump (11).

2. A fully automatic tower-type three-stage dryer according to claim 1, characterized in that: The bottom outer wall of the drying bin (5) is fixedly connected to a discharge cooling bin (6), and the bottom outer wall of the discharge cooling bin (6) is fixedly connected to a discharge valve port (37). The feeding bin (2) is loaded with rapeseed, which flows through the strong wind dehumidification bin (3), the preheating bin (4), the drying bin (5), and the discharge cooling bin (6) in sequence and is discharged from the discharge valve port (37).

3. A fully automatic tower-type three-stage dryer according to claim 1, characterized in that: The hot air inlet of the strong wind dehumidification chamber (3) is fixedly connected to a dustproof plate (33), and the hot air outlet of the strong wind dehumidification chamber (3) is fixedly installed with a powerful fan (34).

4. A fully automatic tower-type three-stage dryer according to claim 1, characterized in that: The inner walls of the strong wind dehumidification chamber (3), the preheating chamber (4) and the drying chamber (5) are all fixedly mounted with multiple rows of front baffles (12), and both ends of the outer wall of one side of the front baffle (12) are fixedly mounted with flat orifice plates (13), and one end of the flat orifice plate (13) away from the front baffle (12) is fixedly connected to a rear baffle (14), and the rear baffle (14) and the front baffle (12) are arranged in a staggered manner, and the upper and lower ends of the multiple rows of flat orifice plates (13) of the strong wind dehumidification chamber (3), the preheating chamber (4) and the drying chamber (5) are all fixedly connected.

5. A fully automatic tower-type three-stage dryer according to claim 4, characterized in that: Ventilated ventilation screens (36) are fixedly mounted on both outer walls of the plane orifice plate (13), and interlayer bottom plates (35) are fixedly mounted on the upper and lower outer walls of each bin.

6. The fully automatic tower-type three-stage dryer according to claim 5, characterized in that: A bidirectional motor (15) is fixedly connected to an outer wall of one side of the rear baffle (14), and the axis of the bidirectional motor (15) is fixedly connected to a connecting gear 1 (16). The top outer wall of the interlayer bottom plate (35) is rotatably connected to a row of double-layer connecting ring plates (17), wherein the outer wall of one of the double-layer connecting ring plates (17) is fixedly connected to a connecting gear 2 (18), and the connecting gear 2 (18) is meshed and connected to the outer wall of the connecting gear 1 (16), and the outer walls of adjacent double-layer connecting ring plates (17) are meshed and rotatably connected to a connecting belt (19).

7. A fully automatic tower-type three-stage dryer according to claim 6, characterized in that: The top outer wall of the connecting belt (19) is fixedly connected to a bidirectional threaded rod (20), the outer wall of the bidirectional threaded rod (20) is provided with a connecting block (21), the inner wall of the connecting block (21) is provided with a connecting through hole (22) connected to the upper and lower parts, the inner wall of the connecting through hole (22) is slidably connected to the outer wall of the bidirectional threaded rod (20), and the inner wall of the connecting block (21) is rotatably installed with an engaging slider, and the outer wall of the engaging slider is engaged with the inner wall of the bidirectional threaded rod (20).

8. The fully automatic three-stage tower dryer according to claim 7, characterized in that: One side outer wall of the connecting block (21) is rotatably connected to a rotating shaft (23), one side outer wall of the rotating shaft (23) is fixedly connected to a rubber pick (24), one side outer wall of the rotating shaft (23) is fixedly mounted with a movable plate (28), one side outer wall of the rear baffle (14) is fixedly mounted with a rack (29), one side outer wall of the movable plate (28) is meshedly connected with one side outer wall of the rack (29), and the outer wall of one end of the rubber pick (24) away from the rotating shaft (23) is movably fitted with the outer wall of the plane orifice plate (13).

9. The fully automatic three-stage tower dryer according to claim 8, characterized in that: The outer walls at both ends of the rotating shaft (23) are rotatably mounted with valve bottom plates (27), and the upper and lower outer walls of the valve bottom plate (27) are fixedly connected to the limiting frames (26), and the outer walls on both sides of the limiting frames (26) are movably fitted with the outer walls on both sides of the plane orifice plate (13). The outer walls of the limiting frames (26) at both ends are fixedly connected to the same limiting stop rod (25), and the outer wall of the limiting stop rod (25) is movably fitted with the outer wall of the rubber pick (24).

10. The fully automatic three-stage tower dryer according to claim 4, characterized in that: The bottom inner wall of the plane orifice plate (13) in the drying bin (5) is fixedly connected to the valve bottom plate (27), the bottom outer wall of the interlayer bottom plate (35) is fixedly installed with an adjustment guide rail (30), one end outer wall of the adjustment guide rail (30) is fixedly installed with (31), the outer wall of the adjustment guide rail (30) is slidably connected to the movable plate (28), the top outer wall of the movable plate (28) is movably fitted with the bottom outer wall of the valve bottom plate (27), and the valve bottom plate (27) and the movable plate (28) are both provided with the same rack (29) in an array.

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