Grain drying apparatus and method

Abstract

The application discloses a grain drying equipment and a drying method. The equipment comprises a drying unit, a transfer unit and a storage unit. After being dried by the drying unit, the grain particles after primary screening are sent into the transfer unit, and then are transferred to the storage unit for storage. The grain particles stored in the storage unit can re-enter the transfer unit for further improvement and are subjected to cyclic drying by the storage unit. The transfer unit can slide between the drying unit and the storage unit. The equipment can effectively dry the grain, store the grain in the storage unit in a moisture-proof manner, and cyclically dry the grain, so that the grain is prevented from being mildewed.

Description

Technical Field

[0001] This invention relates to a grain drying equipment and drying method. Background Technology

[0002] Grains that need to be dried for storage include rice, wheat, barley, and corn. These common grains need to be sun-dried after harvesting, but sun-drying has limited drying effect. When storing large quantities, they need to be further dried using drying equipment.

[0003] Existing drying equipment mainly uses assembly line drying, employing conveyor belts for transporting materials through the drying equipment to complete the drying process. However, this operating method has the following drawbacks:

[0004] First, the conveyor belt itself is not airtight, which means that the grain particles in the lower layer are subjected to the hot air for a relatively short period of time.

[0005] Secondly, if the grain is stored immediately after drying, the grain cannot be dried during storage. If storage problems occur or in humid weather, the grain is more likely to become damp.

[0006] Based on the above problems, we designed a grain drying equipment and method that can achieve effective drying, prevent moisture and preserve grain grains in storage, and perform cyclic drying to avoid grain mold. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a grain drying equipment and method that can achieve effective drying, prevent moisture and preserve grain grains in storage, and perform cyclic drying to avoid grain mold.

[0008] To solve the above problems, the present invention adopts the following technical solution:

[0009] A grain drying device includes a drying unit, a transfer unit, and a storage unit. Grain particles that have undergone initial screening are dried by the drying unit and then sent to the transfer unit. The transfer unit then transfers the grain particles to the storage unit for storage. The grain particles stored in the storage unit can be re-entered into the transfer unit and lifted again, and then circulated and dried through the storage unit. The transfer unit can slide between the drying unit and the storage unit.

[0010] Preferably, the drying unit includes a drying trough, the interior of which is equipped with a baffle mechanism forming multiple V-shaped grooves with openable bottoms. Grain particles entering from above the drying trough accumulate in the V-shaped grooves. Hot air devices are installed on the front and rear sides of the drying trough, supplying hot air into the baffle structure. The hot air is blown out from the surface of the baffle mechanism into the V-shaped grooves. When the drying time is reached, the bottom of the baffle mechanism opens, opening the bottom of the V-shaped grooves, allowing the dried grain particles to fall. Inside the drying trough, below the baffle mechanism, is a mesh plate with a mesh size smaller than the grain particles being dried. A discharge pipe for discharging grain particles is located on the left side of the drying trough, with the mesh plate tilted downwards towards the discharge pipe. A connecting pipe corresponding to the area below the mesh plate is located on the right side of the drying trough, through which a dust removal fan is installed. A dust removal bag is detachably installed at the outlet of the dust removal fan. The discharge pipe is adapted to the transfer unit.

[0011] Preferably, the baffle mechanism includes fixed baffles installed on the left and right walls inside the drying trough, and movable baffles installed between the two fixed baffles. A rubber sealing strip is connected between the tops of two adjacent movable baffles. A V-shaped groove is formed between the two movable baffles and between the movable baffles and the fixed baffles. A bushing is provided near the top of the end face of the movable baffle away from the V-shaped groove. A support shaft is longitudinally arranged inside the drying trough, and the bushing is sleeved on the support shaft. The bushing rotates coaxially along the support shaft. The front and rear ends of the fixed baffles and the movable baffles are in contact with the walls of the drying trough. A through groove is provided on the surface of the movable baffle, and a breathable mesh is provided in the through groove. The mesh size of the breathable mesh is smaller than the particle size of the grain being dried. Multiple vertical grooves are provided on the front and rear ends of the drying trough. The vertical grooves are located between two adjacent movable baffles, and a sealing strip is assembled between the front and rear vertical grooves. A sliding rod is rotatably connected to the movable baffles on both sides. When the sliding rod slides upward to its limit position, the lower end of the V-shaped groove closes. When the sliding rod gradually slides down along the vertical groove, the lower end of the V-shaped groove gradually opens, and the grain particles are discharged from below the V-shaped groove. A first connecting rod connecting multiple sliding rods is provided on both the front and rear sides of the drying trough. An electric push rod is installed on both the front and rear end faces of the drying trough. The electric push rods on the front and rear sides operate synchronously, and the telescopic ends of the electric push rods are fixedly connected to the first connecting rods. An upper elastic sealing plate and a lower elastic sealing plate are provided between two adjacent movable baffles, on the side furthest from the V-shaped groove. The upper elastic sealing plate, lower elastic sealing plate, and the movable baffles on both sides cooperate to form a hot air cavity. A breathable mesh connects to the hot air cavity, and the vertical groove is located above the hot air cavity. Air holes connecting to the hot air cavity are provided on the front and rear end faces of the drying trough, and the hot air device cooperates with the air holes.

[0012] Preferably, both the upper and lower elastic sealing plates are curved downwards in an arc shape.

[0013] Preferably, the hot air device includes a hot air blower, a main air duct, and branch air ducts. The branch air ducts are installed at the air holes. The main air duct is connected in parallel to the branch air ducts located on the same side. One end of the main air duct is closed, and the other end is connected to the air outlet of the hot air blower. The hot air blower is fixed to the outside of the drying tank.

[0014] Preferably, a heightening trough is detachably installed on the top of the drying trough.

[0015] Preferably, the transfer unit includes a transfer trough, and the right side of the transfer trough is provided with an insertion hole for inserting the outlet pipe. The outlet pipe slides along the axial direction of the insertion hole. A screw conveyor is installed through the transfer trough. The screw conveyor is offset from the insertion hole in front and behind. The material in the transfer trough is lifted upward to the storage unit by the screw conveyor. The material in the storage unit can be returned to the transfer trough.

[0016] Preferably, the storage unit includes a storage tank, a discharge hopper at the lower end of the storage tank, the diameter of the discharge hopper gradually decreasing downwards, a bottom cover rotatably mounted at the bottom opening of the discharge hopper, a discharge pipe obliquely mounted on the side of the bottom cover, and a pipe cap detachably mounted at the opening of the discharge pipe; a spherical tank top at the upper end of the storage tank, an inlet pipe at the top axis of the tank top, and a flared mouth at the upper end of the inlet pipe; a base near the lower part of the outer wall of the storage tank, an outer tank body rotatably mounted within the base, the outer tank body clearance-fitted with the storage tank, a spiral blade installed inside the outer tank body, the inner diameter of the spiral blade clearance-fitted with the storage tank (the clearance is less than 0.5 mm), an external gear installed near the bottom of the outer tank body, and a support frame installed outside the base, via the... A support frame is equipped with a geared motor, and the output end of the geared motor is equipped with a drive gear that meshes with the external gear. A first flared opening is provided on the top of the outer tank, and the height of the first flared opening is lower than that of the outer tank. The feed pipe passes through the axis of the first flared opening, and a discharge gap is formed between the first flared opening and the feed pipe, which corresponds to the top of the tank. A first ventilated mesh is inclinedly provided inside the base, and an outlet is provided on the outer wall of the base. The first ventilated mesh is inclined towards the outlet, and the outlet corresponds to the transfer groove. A sealing door is slidably fitted at the outlet, and the sealing door closes the outlet after sliding in. A frame plate is provided on the side of the base away from the outlet, and a first hot air blower is installed through the frame plate. The first hot air blower blows air into the base, and the air inlet is located below the first ventilated mesh.

[0017] Preferably, dispersed particles are distributed on the surface of the top of the tank, the dispersed particles protruding from the surface of the top of the tank, and the grain particles falling from the feeding gap are dispersed by the dispersed particles.

[0018] A grain drying device and drying method, comprising the following steps:

[0019] Step 1: First, pre-dry the harvested grains. Pre-drying mainly involves sun exposure. In cases of insufficient sunlight, traditional drying equipment is used for preliminary drying to reduce the moisture content of the grains to less than 30%.

[0020] The second step involves the grains, which have undergone preliminary drying through conventional operations, entering the drying unit for further drying. After drying, the grains are transferred to the storage unit via a transfer unit for storage.

[0021] The third step is to conduct random checks every 20 days. When the moisture content of the grain exceeds 15%, it is dried by self-heating in the storage unit. After drying for 20 to 30 minutes, it is tested again. If the moisture content does not meet the standard requirements, the grain particles stored in the storage unit need to be transferred to the storage unit through the transfer unit and then sent back to the storage unit for drying until the storage requirements are met.

[0022] The beneficial effects of this invention are:

[0023] One advantage is that this device achieves secondary drying of sun-dried grains through a drying unit. During drying, the grains are divided into sections by V-shaped grooves, allowing heat to penetrate the grains better and achieving faster drying.

[0024] Secondly, by adjusting the position of the transfer device, it is possible to choose whether to transport grain particles into the outer tank or into the storage tank, making the adjustment simple and convenient.

[0025] Thirdly, the storage unit allows for the storage of dried grain particles. During storage, the outer tank isolates moisture from entering the storage tank, providing a degree of insulation. In humid seasons such as the rainy season, hot air can be actively injected between the outer tank and the storage tank to dehumidify and prevent moisture from penetrating into the storage tank. Furthermore, the stored grain particles can be discharged to a transfer unit and then transported to the outer tank. Through the spiral channel formed by the spiral blades, the grain particles are dried by the hot air as they slide down. During this process, the rotation of the outer tank drives the rotation of the spiral blades, which can prolong the time the grain particles spend passing through the spiral blades and improve the drying effect.

[0026] Fourthly, this device integrates drying and storage functions, resulting in a more complete effect.

[0027] Fifthly, the storage unit, transfer unit, and drying unit in this device are relatively independent. In other words, a single drying unit and transfer unit can be combined with multiple storage units to reduce the volume occupied by the equipment. Attached Figure Description

[0028] 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, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 Here is a structural diagram of the drying unit;

[0031] Figure 3 Detailed diagram of the drying unit;

[0032] Figure 4 This is a cross-sectional view of the drying unit;

[0033] Figure 5 for Figure 4 Enlarged view at point A;

[0034] Figure 6 This is a structural diagram of the transfer unit;

[0035] Figure 7 This is a schematic diagram of the storage unit structure;

[0036] Figure 8 This is a schematic diagram of the storage unit with the outer tank removed.

[0037] Figure 9 This is a partial cross-sectional view of the storage unit;

[0038] Figure 10 This is a top view of the first breathable mesh. Detailed Implementation

[0039] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0040] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0041] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0042] Furthermore, in the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] See Figure 1 The grain drying equipment shown includes a drying unit 1, a transfer unit 2, and a storage unit 3. Grain particles that have undergone initial screening are dried by the drying unit 1 and then sent to the transfer unit 2. They are then transferred to the storage unit 3 for storage. The grain particles stored in the storage unit 3 can be re-entered into the transfer unit 2 and lifted again, and then circulated and dried through the storage unit 3. The transfer unit 2 can slide between the drying unit 1 and the storage unit 3.

[0045] The drying unit 1 and the transfer unit 2 can be supported by a platform with wheels at the bottom to facilitate the combination of multiple storage units 3.

[0046] See Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the drying unit 1 includes a drying trough 101. The drying trough 101 is equipped with a baffle mechanism 11, which forms a plurality of V-shaped grooves 12 with openable bottoms. Grain particles entering from above the drying trough 101 accumulate in the V-shaped grooves 12. Hot air devices 13 are installed on the front and rear sides of the drying trough 1. The hot air devices 13 send hot air into the baffle structure 2. The hot air blows out from the surface of the baffle mechanism 2 into the V-shaped grooves 12. When the drying time is reached, the bottom of the baffle mechanism 11 opens, and the bottom of the V-shaped grooves 12 is opened, allowing the dried grain particles to fall. Inside the drying trough 101, a mesh plate 14 is provided below the baffle mechanism 11. The mesh size of the mesh plate 14 is smaller than the grain particles to be dried. A discharge pipe 15 for discharging grain particles is provided on the left side of the drying trough 101. The mesh plate 14 is inclined downwards towards the discharge pipe 15. A connecting pipe 16 corresponding to the area below the mesh plate 14 is provided on the right side of the drying trough 101. A dust removal fan 17 is installed through the connecting pipe 16. A dust removal bag 18 is detachably installed at the air outlet of the dust removal fan 17. The discharge pipe 15 is adapted to the transfer unit 2.

[0047] In the above technical solution, the V-shaped groove 12 formed by the baffle mechanism 11 can intercept the material entering from above the drying tank 101. The upper height of the baffle mechanism 11 is slightly lower than the top height of the drying tank 101. In other words, when feeding, the material can be spread out and filled into each V-shaped groove 12.

[0048] Hot air is introduced from the inside of the baffle mechanism 11 through the hot air device 13. Since the grain particles are dispersed by the V-shaped groove 12 and the opening of the V-shaped groove 12 faces upward and the width gradually increases upward, the hot air blown out from the hot air device 13 can better penetrate upward through the gaps between the grain particles and take away the moisture contained in the grain particles.

[0049] After drying, the baffle mechanism 11 is adjusted so that the bottom of the V-shaped groove 12 is opened, and the grain particles in the V-shaped groove are discharged downwards. The speed at which the grain particles are discharged downwards depends on the width of the opening at the bottom of the V-shaped groove 12. When it is necessary to capture dust particles in the grain particles, the discharge of grain particles can be reduced, and then the dust particles are captured by the dust removal fan 17. In this process, the grain particles fall from the bottom of the V-shaped groove 12 and then hit the mesh plate 14. The dust is raised and then adsorbed by the dust removal fan 17 and stored in the dust removal bag 18. The air is discharged through the pores of the dust removal bag 18. After rolling along the mesh plate 14, the grain particles are discharged from the outlet pipe 15.

[0050] After the grain particles are discharged, the next drying operation can begin. At this time, the baffle mechanism 11 is adjusted so that the bottom of the V-shaped groove 12 is closed, and the next drying operation can begin.

[0051] See Figure 3 , Figure 4 and Figure 5 As shown, the baffle mechanism 11 includes fixed baffles 110 installed on the left and right walls inside the drying tank 101, and movable baffles 111 installed between the two fixed baffles 110. A rubber sealing strip 112 is connected between the top ends of two adjacent movable baffles 111. A V-shaped groove 12 is formed between the two movable baffles 111 and between the movable baffles 111 and the fixed baffles 110. A bushing 113 is provided near the top of the end face of the movable baffle 111 away from the V-shaped groove 12. A support shaft 114 is longitudinally arranged inside the drying tank 101. The bushing 113 is sleeved on the support shaft 114 and rotates coaxially along the support shaft 114. The front and rear end faces of the fixed baffle 110 and the movable baffle 111 are in contact with the wall of the drying trough 101. A through groove is provided on the surface of the movable baffle 111, and a breathable mesh 115 is provided in the through groove. The mesh size of the breathable mesh 115 is smaller than the particle size of the grain being dried. Multiple vertical grooves 116 are provided at the front and rear end faces of the drying trough 101. The vertical grooves 116 are located between two adjacent movable baffles 111, and a sliding rod 117 is assembled between the front and rear vertical grooves 116. The sliding rod 117 is rotatably connected to the movable baffles 111 on both sides by a connecting rod 118. When the sliding rod 117 slides upward to its limit position, the lower end of the V-shaped groove 12 closes. When the sliding rod 117 gradually slides down along the vertical groove 116, the lower end of the V-shaped groove 12 gradually opens, and the grain particles are discharged from below the V-shaped groove 12. A first connecting rod 122 connecting multiple sliding rods 117 is provided on both the front and rear sides of the drying trough 101. An electric push rod 123 is installed on both the front and rear end faces of the drying trough 101. The electric push rods 123 on the front and rear sides operate synchronously. The telescopic end is fixedly connected to the first connecting rod 122; between two adjacent movable baffles 111, an upper elastic sealing plate 119 and a lower elastic sealing plate 120 are provided on the side away from the V-shaped groove 12. The upper elastic sealing plate 119, the lower elastic sealing plate 120 and the movable baffles 111 on both sides cooperate to form a hot air cavity 121. The breathable mesh 115 connects to the hot air cavity 121. The vertical groove 116 is located above the hot air cavity 121. Air holes 124 connecting to the hot air cavity 121 are provided at the front and rear end faces of the drying tank 101. The hot air device 13 cooperates with the air holes 124.

[0052] In the above technical solution, the slide rod 117 is moved upward by the extension of the electric push rod 123. When the slide rod 117 moves upward, it drives the connecting rod 118 to rotate. At this time, the movable baffle 111 rotates along the support shaft 114, and the bottom gap of the movable baffles 111 on both sides gradually narrows, forming the V-shaped groove 12.

[0053] After drying is complete, when the material needs to be discharged, the electric push rod 123 retracts, causing the slide rod 117 to move down. After moving down, it drives the movable baffles 111 on both sides to rotate. At this time, the bottom of the V-shaped groove 12 is opened, and the grain particles in the V-shaped groove begin to fall.

[0054] In the above technical solution, an upper elastic sealing plate 119 and a lower elastic sealing plate 120 are used for upper and lower sealing, so that the hot air entering the hot air device 13 through the air hole 124 is concentrated and evenly passed out from the air permeable net 115 to complete the heating and drying of the grain particles, and prevent the hot air from leaking out from the vertical groove 116.

[0055] Secondly, the advantage of the above-mentioned sealing is that the incoming hot air can heat the movable baffle 111, so that the movable baffle 111 is always in a hot state, and the heat will have a better drying effect after it is transferred out.

[0056] See Figure 5 As shown, both the upper elastic sealing plate 119 and the lower elastic sealing plate 120 are bent downwards in an arc shape.

[0057] In the above technical solution, the upper elastic sealing plate 119 and the lower elastic sealing plate 120 with downward arc bending are adopted. This is mainly to make the rotation of the movable baffles 111 on both sides smoother when the electric push rod 123 retracts. If the sealing plate is set horizontally, the upper and lower movement of the sealing plate will be unclear when the lower ends of the movable plates 111 on both sides come together, which will also increase the retraction resistance of the electric push rod 123.

[0058] Therefore, this technical solution uses a sealing plate that bends downwards in an arc.

[0059] See Figure 3 As shown, the hot air device 13 includes a hot air blower 131, a main air duct 132, and a branch air duct 133. The branch air duct 133 is installed at the air hole 124. The main air duct 132 is connected in parallel to the branch air duct 133 located on the same side. One end of the main air duct 132 is closed, and the other end is connected to the air outlet of the hot air blower 131. The hot air blower 131 is fixed to the outside of the drying tank 101.

[0060] In the above technical solution, hot air is generated by hot air blower 131 and then fed into air outlet 124 through main air duct 132 and branch air duct 133 to complete the drying of grain particles.

[0061] See Figure 2 As shown, a heightening groove 144 is detachably installed on the top of the drying tank 101.

[0062] The heightened trough 144 allows the drying trough 101 to load more grain particles at once. After adopting the heightened trough 144, a trough cover needs to be added for sealing to increase the heat preservation effect of the device and improve the heat energy utilization rate. Multiple small exhaust holes are drilled on the trough cover.

[0063] See Figure 1 and Figure 6 As shown, the transfer unit 2 includes a transfer trough 201. The right side of the transfer trough 201 is provided with an insertion hole for inserting the outlet pipe 15. The outlet pipe 15 slides along the axial direction of the insertion hole. A screw conveyor 202 is assembled through the transfer trough 201. The screw conveyor 202 is offset from the insertion hole. The material in the transfer trough 201 is lifted upward to the storage unit 3 by the screw conveyor 202. The material in the storage unit 3 can be returned to the transfer trough 201.

[0064] The bottom of the transfer trough 201 is equipped with pulleys, which allows the transfer trough 201 to move laterally.

[0065] See Figures 7 to 10As shown, the storage unit 3 includes a storage tank 301. A discharge hopper 302 is provided at the lower end of the storage tank 301. The diameter of the discharge hopper 302 gradually decreases downwards. A bottom cover 303 is rotatably installed at the bottom opening of the discharge hopper 302. A discharge pipe 304 is inclined downwards on the side of the bottom cover 303. A pipe cap 305 is detachably installed at the opening of the discharge pipe 304. A spherical tank top 306 is provided at the upper end of the storage tank 301. An inlet pipe 307 is provided at the top axis of the tank top 306. A [missing information - likely a device or structure] is provided at the upper end of the inlet pipe 307. A flared opening 308; a base 309 is provided near the lower part of the outer wall of the storage tank 301; an outer tank body 310 is rotatably disposed within the base 309, and the outer tank body 310 is clearance-fitted with the storage tank 301; a spiral blade 311 is installed inside the outer tank body 310, and the inner diameter of the spiral blade 311 is clearance-fitted with the storage tank 301, with a clearance of less than 0.5 mm; an external gear 312 is installed near the bottom of the outer tank body 310; a support frame 313 is installed outside the base 309; and the support frame 313... A geared motor 314 is installed, and a drive gear 315 that meshes with the external gear 312 is installed at the output end of the geared motor 314; a first flared opening 316 is provided on the top of the outer tank 310, the height of the first flared opening 316 is lower than that of the flared opening 308, and the feed pipe 307 passes through the axis of the first flared opening 316, forming a discharge gap between the first flared opening 316 and the feed pipe 307, the discharge gap corresponding to the tank top 306; a first venting mesh 317 is inclinedly provided inside the base 309, and the base 309... An outlet 318 is provided on the outer wall of the base 309. The first ventilated mesh 317 is inclined toward the outlet 318. The outlet 318 corresponds to the transfer groove 201. A sealing door 319 is slidably fitted at the outlet 318. After the sealing door 319 slides in, it closes the outlet 318. A frame plate 320 is provided on the side of the base 309 away from the outlet 318. A first hot air blower 321 is installed through the frame plate 320. The first hot air blower 321 blows air into the base 309, and the air inlet is located below the first ventilated mesh 317.

[0066] In the above technical solution, the lateral position adjustment of the transfer trough 201 can change the discharge position of the screw conveyor 202, allowing selection of whether to feed material towards the funnel opening 308 or towards the first funnel opening 316.

[0067] The technical problems actually solved by the above technical solution are as follows:

[0068] Under normal circumstances, the grain particles dried by the drying unit 1 are dried and can be fed through the transfer trough 201 and then through the screw conveyor 202 to the funnel 308. The material after passing through the funnel 308 is injected into the storage tank 301 for storage. During storage, the upper part of the funnel 308 needs to be sealed. The sealing method can be selected according to the actual situation, such as sealing with a lid or sealing with a plastic film, as long as the sealing conditions are met.

[0069] When encountering humid weather, hot air is introduced between the outer tank 310 and the storage tank 301 through the first hot air blower 321. The hot air heats the storage tank 301 and plays a role in dehumidification. This method needs to be activated at the beginning of humid weather to prevent moisture and humidity from entering.

[0070] If the storage tank 301 becomes damp due to delayed opening, the pipe cover 305 should be opened promptly, and the discharge pipe 304 should be aligned with the transfer trough 201. At this time, the grain particles in the storage tank 301 will be discharged into the transfer trough. The capacity of the transfer trough is customized according to the actual situation. Ideally, it should be larger than the storage capacity of the storage tank 301. If local conditions do not allow it, it can be slightly smaller than the capacity of the storage tank 301, but it must not be less than 1 / 2 of the internal capacity of the storage tank 301.

[0071] After the grain particles in storage tank 301 are unloaded into transfer trough 201, screw conveyor 202 is simultaneously started, and the position of transfer trough 201 is adjusted so that the grain particles lifted by screw conveyor 202 are discharged into first flared opening 308. At this time, the opening of sealing door 319 is adjusted so that a small amount of grain particles always accumulate at outlet 318, reducing heat loss from first hot air blower 321. This allows the hot air generated by first hot air blower 321 to move upward along the spiral channel constructed by spiral blades 311 and act on the grain particles that continuously fall along spiral blades 311.

[0072] During this process, we can choose whether to start the reduction motor 314. When the reduction motor 314 starts, it drives the outer tank 310 to rotate slowly. The rotation of the outer tank 310 produces a lifting effect, which is opposite to the falling direction of the grain particles. At this time, the rolling speed of the grain particles slows down, prolongs the time the grain particles roll at the spiral blade 311, and increases the time of being exposed to hot air. The faster the rotation speed of the outer tank 310, the longer the time required for the grain particles to fall.

[0073] During the entire hot air drying process, the storage tank 301 is heated, and the water vapor inside the storage tank 301 is evaporated upwards, keeping the inside of the storage tank 301 dry.

[0074] After the grain particles have been heated and dried at the spiral blades 311, they are moved in the transfer tank 201 and then lifted back to the bell mouth by the spiral elevator 202 and stored in the upper layer of the storage tank 301. After all the grain particles have been lifted, the pipe cover 305 is opened again and the remaining grain particles are dried in accordance with the above method.

[0075] In the above technical solution, the combination of the outer tank and the storage tank makes it difficult for water vapor to penetrate into the storage tank.

[0076] Combined with active hot air intake, it can achieve heat preservation of the storage tank and moisture isolation, preventing the grains from getting damp.

[0077] See Figure 7 and Figure 8 As shown, dispersed particles 331 are distributed on the surface of the top of the tank 316. The dispersed particles 331 protrude from the surface of the top of the tank 316, and the grain particles falling from the feeding gap are dispersed by the dispersed particles 331.

[0078] Dispersible Particle 331 can effectively disperse grain particles.

[0079] A grain drying device and drying method, comprising the following steps:

[0080] Step 1: First, pre-dry the harvested grains. Pre-drying mainly involves sun exposure. In cases of insufficient sunlight, traditional drying equipment is used for preliminary drying to reduce the moisture content of the grains to less than 30%.

[0081] The second step involves the grains, which have undergone preliminary drying through conventional operations, entering the drying unit for further drying. After drying, the grains are transferred to the storage unit via a transfer unit for storage.

[0082] The third step is to conduct random checks every 20 days. When the moisture content of the grain exceeds 15%, it is dried by self-heating in the storage unit. After drying for 20 to 30 minutes, it is tested again. If the moisture content does not meet the standard requirements, the grain particles stored in the storage unit need to be transferred to the storage unit through the transfer unit and then sent back to the storage unit for drying until the storage requirements are met.

[0083] 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 present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A grain drying device, characterized in that: It includes a drying unit (1), a transfer unit (2) and a storage unit (3). After the grain particles are initially screened, they are dried by the drying unit (1) and then sent to the transfer unit (2). They are then transferred to the storage unit (3) for storage. The grain particles stored in the storage unit (3) can be re-entered into the transfer unit (2) and lifted again, and then circulated and dried through the storage unit (3). The transfer unit (2) can slide between the drying unit (1) and the storage unit (3). The drying unit (1) includes a drying trough (101). A baffle mechanism (11) is provided inside the drying trough (101). Multiple V-shaped grooves (12) with openable bottoms are formed by the baffle mechanism (11). Grain particles entering from above the drying trough (101) accumulate in the V-shaped grooves (12). Hot air devices (13) are installed on the front and rear sides of the drying trough (101). The hot air devices (13) send hot air into the baffle mechanism (11). The hot air blows out from the surface of the baffle mechanism (11) into the V-shaped grooves (12). When the drying time is reached, the bottom of the baffle mechanism (11) opens. At this time, the bottom of the V-shaped grooves (12) is opened, and the dried grain particles fall down. Inside the drying trough (101), a mesh plate (14) is provided below the baffle mechanism (11). The mesh size of the mesh plate (14) is smaller than the grain particles to be dried. A discharge pipe (15) for discharging grain particles is provided on the left side of the drying trough (101). The mesh plate (14) is inclined downward towards the discharge pipe (15). A connecting pipe (16) corresponding to the lower part of the mesh plate (14) is provided on the right side of the drying trough (101). A dust removal fan (17) is installed through the connecting pipe (16). A dust removal bag (18) is detachably installed at the air outlet of the dust removal fan (17). The discharge pipe (15) is adapted to the transfer unit (2). The baffle mechanism (11) includes fixed baffles (110) installed on the left and right walls inside the drying tank (101), and movable baffles (111) installed between the two fixed baffles (110). A rubber sealing strip (112) is connected between the top ends of two adjacent movable baffles (111). A V-groove (12) is formed between the two movable baffles (111) and between the movable baffle (111) and the fixed baffle (110). A bushing (113) is provided near the top of the end face of the movable baffle (111) away from the V-groove (12). A support shaft (114) is longitudinally arranged inside the drying tank (101). The bushing (113) is sleeved on the support shaft (114) and rotates coaxially along the support shaft (114). The front and rear ends of the fixed baffle (110) and the movable baffle (111) are in contact with the wall of the drying trough (101). A through groove is provided on the plate surface of the movable baffle (111), and a breathable mesh (115) is provided in the through groove. The mesh size of the breathable mesh (115) is smaller than the particle size of the grain being dried. Multiple vertical grooves (116) are provided at the front and rear ends of the drying trough (101). The vertical grooves (116) are located between two adjacent movable baffles (111). A sliding rod (117) is installed between the front and rear vertical grooves (116). A connecting rod (118) is rotatably connected between the rod (117) and the movable baffles (111) on both sides. When the sliding rod (117) slides upward to its limit position, the lower end of the V-shaped groove (12) closes. When the sliding rod (117) slides down the vertical groove (116) step by step, the lower end of the V-shaped groove (12) gradually opens, and the grain particles are discharged from the bottom of the V-shaped groove (12). A first connecting rod (122) connecting multiple sliding rods (117) is provided on the front and rear sides of the drying tank (101). An electric push rod (123) is installed on the front and rear end faces of the drying tank (101). The electric push rods (123) on the front and rear sides operate synchronously. The telescopic end of the electric push rod (123) It is fixedly connected to the first connecting rod (122); between two adjacent movable baffles (111), an upper elastic sealing plate (119) and a lower elastic sealing plate (120) are provided on the side away from the V-shaped groove (12). The upper elastic sealing plate (119), the lower elastic sealing plate (120) and the movable baffles (111) on both sides cooperate to form a hot air cavity (121). The breathable mesh (115) is connected to the hot air cavity (121). The vertical groove (116) is located above the hot air cavity (121). A wind hole (124) is provided at the front and rear end faces of the drying tank (101) to connect to the hot air cavity (121). The hot air device (13) cooperates with the wind hole (124).

2. The grain drying equipment according to claim 1, characterized in that: Both the upper elastic sealing plate (119) and the lower elastic sealing plate (120) are bent downwards in an arc shape.

3. The grain drying equipment according to claim 1, characterized in that: The hot air device (13) includes a hot air blower (131), a main air duct (132) and a branch air duct (133). The branch air duct (133) is installed at the air hole (124). The main air duct (132) is connected in parallel to the branch air duct (133) located on the same side. One end of the main air duct (132) is closed, and the other end is connected to the air outlet of the hot air blower (131). The hot air blower (131) is fixed to the outside of the drying tank (101).

4. The grain drying equipment according to claim 1, characterized in that: A heightening groove (144) is detachably installed on the top of the drying tank (101).

5. The grain drying equipment according to claim 1, characterized in that: The transfer unit (2) includes a transfer trough (201). The right side of the transfer trough (201) is provided with an insertion hole for inserting the outlet pipe (15). The outlet pipe (15) slides along the axial direction of the insertion hole. A screw conveyor (202) is assembled through the transfer trough (201). The screw conveyor (202) is offset from the insertion hole. The material in the transfer trough (201) is lifted upward to the storage unit (3) by the screw conveyor (202). The material in the storage unit (3) can be returned to the transfer trough (201).

6. The grain drying equipment according to claim 5, characterized in that: The storage unit (3) includes a storage tank (301), a discharge hopper (302) at the lower end of the storage tank (301), the diameter of the discharge hopper (302) gradually decreasing downwards, a bottom cover (303) rotatably disposed at the bottom opening of the discharge hopper (302), a discharge pipe (304) inclined downwards on the side of the bottom cover (303), and a pipe cap (305) detachably installed at the opening of the discharge pipe (304); a spherical tank top (306) is disposed at the upper end of the storage tank (301), an inlet pipe (307) is disposed at the top axis of the tank top (306), and a horn is disposed at the upper end of the inlet pipe (307). A base (309) is provided near the lower part of the outer wall of the storage tank (301). An outer tank body (310) is rotatably disposed inside the base (309). The outer tank body (310) is clearance-fitted with the storage tank (301). A spiral blade (311) is installed inside the outer tank body (310). The inner diameter of the spiral blade (311) is clearance-fitted with the storage tank (301) with a clearance of less than 0.5 mm. An external gear (312) is installed near the bottom of the outer tank body (310). A support frame (313) is installed outside the base (309). The support frame (313) is used to install... A geared motor (314) is provided, and a drive gear (315) meshing with the external gear (312) is installed at the output end of the geared motor (314); a first flared opening (316) is provided on the top of the outer tank (310), the height of the first flared opening (316) is lower than that of the flared opening (308), and the feed pipe (307) passes through the axis of the first flared opening (316), forming a discharge gap between the first flared opening (316) and the feed pipe (307), the discharge gap corresponding to the top of the tank (306); a first ventilated mesh (317) is inclinedly provided inside the base (309), and on the base (309) An outlet (318) is provided on the outer wall. The first breathable mesh (317) is inclined toward the outlet (318). The outlet (318) corresponds to the transfer groove (201). A sealing door (319) is slidably fitted at the outlet (318). After the sealing door (319) slides in, it closes the outlet (318). A frame plate (320) is provided on the side of the base (309) away from the outlet (318). A first hot air blower (321) is installed through the frame plate (320). The first hot air blower (321) blows air into the base (309), and the air inlet is located below the first breathable mesh (317).

7. The grain drying equipment according to claim 6, characterized in that: Dispersed particles (331) are distributed on the surface of the top of the tank (306). The dispersed particles (331) protrude from the surface of the top of the tank (306), and the grain particles falling from the feeding gap are dispersed by the dispersed particles (331).

8. A drying method based on the grain drying equipment according to claim 1, characterized in that: Includes the following steps: Step 1: First, pre-dry the harvested grains. Pre-drying mainly involves sun exposure. In cases of insufficient sunlight, traditional drying equipment is used for preliminary drying to reduce the moisture content of the grains to less than 30%. The second step involves the grains, which have undergone preliminary drying through conventional operations, entering the drying unit for further drying. After drying, the grains are transferred to the storage unit via a transfer unit for storage. The third step is to conduct random checks every 20 days. When the moisture content of the grain exceeds 15%, it is dried by self-heating in the storage unit. After drying for 20 to 30 minutes, it is tested again. If the moisture content does not meet the standard requirements, the grain stored in the storage unit needs to be transferred to the intermediate unit and then sent back to the storage unit for drying until the storage requirements are met.

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