Grain dryer with circulating drying function

Abstract

The invention relates to the technical field of grain drying, and discloses a circulating drying grain dryer which comprises a drying oven and a grain distributing assembly slidably arranged in an inner cavity of the drying oven, the grain distributing assembly divides the interior of the drying oven into an upper cavity and a lower cavity, namely a tempering layer and a drying chamber, and a heat conduction plate is assembled on the bottom wall of the drying chamber; a conveying assembly located between the grain distributing assembly and the heat conducting plate is arranged in the drying chamber, a heating assembly is installed at the bottom of the drying oven, an impurity removing assembly capable of connecting the heating assembly with the drying chamber is arranged on one side of the drying oven, and a waste removing assembly located on the periphery of the tempering layer is assembled on the top of the drying oven. A grain receiving hopper used for receiving grain discharged by the drying oven is installed below the heating assembly. Integrated grain drying operation of automatic grain separation, grain dredging and falling and intelligent impurity removal of grains in the drying oven is achieved, namely, during continuous grain separation and drying, a sieve plate is automatically dredged, rice husks mixed in the grains are removed, and continuous and efficient operation of the grain drying operation is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of grain drying technology, and more specifically to a grain dryer with a circulating drying process. Background Technology

[0002] A grain dryer is a device specifically designed for drying grains. It effectively removes moisture from grains, improving storage and transportation efficiency. This equipment typically consists of several key components, including a drying chamber, heating system, ventilation system, and control system. In the agricultural sector, grain dryers play a vital role.

[0003] When processing large quantities of grain, dryers, despite their large capacity, tend to accumulate grain inside the oven, reducing the contact area between the hot airflow and the grain. To address this issue, sieves are typically installed inside the oven to slow down the grain flow and disperse it, allowing the grain to enter the drying chamber in a continuous flow, increasing the heat exchange area and improving the drying effect. However, the sieve holes on the surface of stationary sieves are easily blocked by chaff or retained grain, affecting the drying process. Furthermore, after drying, specialized impurity removal devices are needed to remove the chaff mixed in with the grain, which undoubtedly increases the production costs for enterprises.

[0004] Therefore, this invention proposes a circulating grain dryer to achieve integrated grain drying operations, including automatic grain sorting, unblocking of falling grain, and intelligent impurity removal. That is, while continuously sorting and drying grain, the sieve plate is automatically unblocked, and the husks mixed in with the grain are removed, ensuring the continuous and efficient operation of the grain drying operation. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a circulating grain dryer to solve the problem of how to automatically divide, unblock, and intelligently remove impurities from the grain in the drying oven in the above-mentioned background art. That is, while continuously dividing and drying the grain, the sieve plate is automatically unblocked and the husks mixed in with the grain are removed to ensure the continuous and efficient operation of the grain drying operation.

[0006] The present invention provides the following technical solution: a circulating grain dryer, comprising a drying oven and a grain distribution component slidably disposed in the inner cavity of the drying oven, the grain distribution component dividing the interior of the drying oven into upper and lower chambers, namely a tempering layer and a drying chamber, the bottom wall of the drying chamber is equipped with a heat-conducting plate, and a conveying component is disposed in the drying chamber between the grain distribution component and the heat-conducting plate; a heating component is installed at the bottom of the drying oven, and a cleaning component that can connect the heating component to the drying chamber is disposed on one side of the drying oven; a waste removal component is installed at the top of the drying oven around the tempering layer; and a grain receiving hopper for receiving the grain discharged from the drying oven is installed below the heating component. The grain separating assembly includes a sieve plate, support legs, a signal transmitter, a signal receiver, and a gravity sensor. The sieve plate is slidably connected inside the drying oven. Symmetrically distributed support legs are fixedly installed on the left and right sides of the bottom wall of the sieve plate. The support legs are equipped with a signal transmitter and a gravity sensor. The signal receiver is installed on the inner wall of the drying oven. When the sieve plate rises to be flush with the bottom edge of the waste discharge port on the side wall of the drying oven, that is, at the highest point, the signal receiver can align and receive the transmitted signal from the signal transmitter. The conveying assembly includes a drive shaft, a support handle, a grain pusher, and a dredging component. The drive shaft is rotatably mounted inside the drying chamber of the oven, with a threaded middle section and smooth ends. The support handle is fixedly sleeved on the left and right ends of the drive shaft, allowing the drive shaft to rotate coaxially with the support handles at both ends. The grain pusher is threaded onto the threaded section of the drive shaft, and its bottom end is attached to and slidably connected to the top wall of the heat-conducting plate. In addition, a dredging component is installed on the grain pusher, allowing the grain pusher, which is slidably mounted above the heat-conducting plate, to move back and forth inside the drying chamber as the drive shaft rotates alternately. On one hand, it pushes the multi-stage dried grain from the oven's outlet into the grain receiving hopper; on the other hand, the moving grain pusher carries the dredging component and moves against the bottom wall of the sieve plate to perform continuous dredging operations.

[0007] Furthermore, the unblocking component includes a receiving tube, a piston rod, a spring, a crossbeam, and a cleaning head. The receiving tube is fixedly installed on the grain pusher, and a piston rod is movably inserted into the receiving tube. A spring is provided between the plug handle of the piston rod and the bottom wall of the receiving tube, and the top of the piston rod is connected to the cleaning head through the crossbeam. The spring force is insufficient to support the sieve plate, so that the cleaning head can always move against the bottom wall of the sieve plate under the action of the spring force. When aligning with the grain distribution holes of the sieve plate, the piston rod can carry the cleaning head to puncture the grain distribution holes to avoid the sieve plate from being blocked and losing its grain distribution ability.

[0008] Furthermore, the conveying assembly also includes a waste discharge hood, which is installed on the outer wall of the oven opposite the impurity removal assembly. The waste discharge hood connects the drying chamber and the waste collection device to receive the separated rice husks.

[0009] Furthermore, the impurity removal assembly includes a hood, an impeller, and a first reversible motor. The hood is fixedly connected to the side wall of the oven opposite to the waste discharge hood. The end of the drive shaft extends into the hood and is fixedly sleeved with the impeller. The left side of the impeller is provided with an air intake area located in the inner cavity of the hood. In addition, the drive shaft is fixedly connected to the output shaft of the first reversible motor through a coupling. The body of the first reversible motor is installed on the outer wall of the hood.

[0010] Furthermore, the heating component includes a main body, a heating plate, and a heat-conducting pipe. The main body is fixedly installed on the top wall of the grain receiving hopper. The upper layer of the main body is equipped with a heating plate, and the lower layer of the main body is equipped with a heat-conducting pipe. The heat-conducting pipe is connected to the air intake area of ​​the hood through a conduit, so that the heat-conducting plate can conduct heat from the heating plate to provide auxiliary heating for the grain. The heat-conducting pipe is continuously heated by the heating plate. External airflow is introduced into the heat-conducting pipe and flows to the air intake area of ​​the hood after heat exchange, so that the impeller can provide hot airflow to the drying chamber.

[0011] Furthermore, the surface of the grain separating component is provided with a grain separating hole, which is inverted conical in shape and fits into the cleaning head, so that it can smoothly enter or exit the grain separating hole.

[0012] Furthermore, a base is installed at the bottom of the grain receiving hopper, and a controller is mounted on the base. The top wall of the drying oven is the feed inlet, and the bottom of the drying oven has discharge outlets located on the left and right sides of the heat-conducting plate.

[0013] Furthermore, the waste removal assembly includes a first rack, a scraper, a main gear, a rotating shaft, a second reversible motor, a coupled gear set, a second rack, and a stop plate. The scraper and stop plate are oppositely arranged on the front and rear sides of the oven. The scraper is slidably disposed inside the oven, and the top of the scraper is fixedly connected to the first rack. The rotating shaft, located above the oven, is perpendicular to the first rack. A main gear meshing with the first rack is fixedly sleeved on the rotating shaft, and both ends of the rotating shaft are connected to one of the coupled gear sets. The other gear in the coupled gear set meshes with the second rack, which is connected to the stop plate via a connecting rod. The stop plate is fixedly connected and slidably set outside the waste discharge port of the oven. The output shaft of the second reversible motor is fixedly connected to the rotating shaft through a coupling. The body of the second reversible motor is installed on the outer wall of the oven. The first rack is rotated by the main gear, so that the first rack can carry the scraper to move from front to back along the top wall of the screen plate, pushing the residual particulate impurities on the top wall of the screen plate to the waste discharge port side. At the same time, by means of a set of coupled gears connected to the end of the rotating shaft, the second rack can be driven to slide from top to bottom, so that the second rack can carry the stop plate away from the waste discharge port through the connecting rod, and the chamber can be opened for waste discharge.

[0014] Furthermore, the coupled gear set consists of symmetrically meshing transmission gears and positioning shaft seats, such that the coupled gear set, which is coaxial with the main gear and meshes with the second rack, is in reverse transmission.

[0015] The technical effects and advantages of this invention are as follows: This invention, by incorporating a grain separating component, a conveying component, and a cleaning component, facilitates the coaxial rotation of the drive shaft and the two left and right support handles driven by the first reversible motor. The rotating support handles intermittently lift the support legs and the sieve plate mounted on their tops, causing the sieve plate to slide up and down repeatedly. This agitates and turns the grain accumulated in the tempering layer, both for initial preheating and to improve the grain's discharge capacity within the tempering layer. Simultaneously, the grain pushing frame, slidably positioned above the heat-conducting plate, moves back and forth within the drying chamber with the alternating rotation of the drive shaft, further enhancing the multi-stage... The grain being dried is pushed into the receiving hopper from the discharge port of the drying oven. Meanwhile, a moving grain pusher, carrying a cleaning device, moves along the bottom wall of the sieve plate. Under the elastic force of the spring, the piston rod can carry the cleaning head to extend and puncture the grain distribution holes to prevent the sieve plate from becoming blocked and losing its grain distribution ability. At the same time, the rotating drive shaft also carries an impeller that rotates coaxially. The rotating impeller draws heat from the heat pipe through the guide tube in a vortex manner. On the one hand, it heats the grain for drying, and on the other hand, the airflow can carry away the husks mixed in when the grain is scattered, thus achieving automatic impurity removal from the grain. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure and a partial cross-sectional view of the present invention.

[0018] Figure 3 This is a cross-sectional view of the oven and a schematic diagram of its internal connection structure according to the present invention.

[0019] Figure 4 This is a schematic diagram of the connection structure of the grain distribution component, the conveying component, and the heating component of the present invention.

[0020] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A in the middle.

[0021] Figure 6 This is a schematic diagram of the connection structure between the oven and the waste removal component of the present invention.

[0022] The attached diagram is labeled as follows: 1. Drying oven; 2. Grain distribution assembly; 201. Screen plate; 202. Support leg; 203. Signal transmitter; 204. Signal receiver; 205. Grain sensor; 3. Heat conduction plate; 4. Conveying assembly; 401. Drive shaft; 402. Support handle; 403. Grain pusher; 404. Unblocking component; 4041. Collection pipe; 4042. Piston rod; 4043. Spring; 4044. Crossbeam; 4045. Cleaning head; 405. Waste discharge hood; 5. Impurity removal assembly; 501. Fan shroud; 502. Impeller; 503. First reversible motor; 6. Heating assembly; 601. Main body; 602. Heating plate; 603. Heat pipe; 7. Grain receiving hopper; 8. Waste removal assembly; 801. First rack; 802. Scraper; 803. Main gear; 804. Rotating shaft; 805. Second reversible motor; 806. Coupling gear set; 807. Second rack; 808. Cut-off plate; 9. Base; 10. Controller. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The circulating drying grain dryer involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Reference Figure 1-6 This invention provides a circulating grain dryer, including a drying oven 1 and a grain distribution component 2 slidably disposed inside the drying oven 1. The grain distribution component 2 divides the interior of the drying oven 1 into upper and lower chambers, namely a tempering layer and a drying chamber. A heat-conducting plate 3 is installed on the bottom wall of the drying chamber, and a conveying component 4 is installed inside the drying chamber between the grain distribution component 2 and the heat-conducting plate 3. The conveying component 4 can push the grain distribution component 2 to move up and down periodically during transmission to perform continuous grain distribution and drying operations, and at the same time automatically clear the blockage of the grain distribution component 2. A heating component 6 is installed at the bottom of the drying oven 1, and a cleaning component 5 is installed on one side of the drying oven 1 to connect the heating component 6 to the drying chamber. A waste removal component 8 is installed at the top of the drying oven 1, located outside the tempering layer. The waste removal component 8 can open the compartment of the grain distribution component 2 that reaches the tempering layer to discharge waste during transmission. A grain receiving hopper 7 is installed below the heating component 6 to receive the grain discharged from the drying oven 1.

[0025] In this embodiment, it should be specifically noted that a base 9 is installed at the bottom of the grain receiving hopper 7, and a controller 10 is mounted on the base 9 to receive the judgment information output by the signal receiver 204 and the gravity sensor 205, and to output control commands to the actuator through analysis and processing. The top wall of the drying oven 1 is the feed inlet, which can be connected to the unloading device. The bottom of the drying oven 1 has discharge outlets located on the left and right sides of the heat-conducting plate 3. The grain pusher 403 can move left and right to push the grain that has undergone multi-stage drying into the grain receiving hopper 7 through the discharge outlet of the drying oven 1. Then, the grain is introduced into the recycling device for collection and processing through the grain receiving hopper 7.

[0026] Reference Figure 2-5 The grain distribution component 2 includes a sieve plate 201, support legs 202, a signal transmitter 203, a signal receiver 204, and a gravity sensor 205. The sieve plate 201 is slidably connected inside the oven 1. The support legs 202 are symmetrically distributed and fixedly installed on the left and right sides of the bottom wall of the sieve plate 201. The rotating support handle 402 will intermittently lift the support legs 202 and the sieve plate 201 mounted on top of them, so that the sieve plate 201 slides up and down to turn the grain accumulated in the tempering layer. On the one hand, the grain is turned over for preliminary preheating, and on the other hand, the grain dropping capacity in the tempering layer is improved. The support legs 202 are equipped with a signal transmitter 203 and a gravity sensor 205. The signal receiver 204 is mounted on the inner wall of the oven 1. When the sieve plate 201 rises to be flush with the bottom edge of the waste discharge port on the side wall of the oven 1, that is, at the highest point, the signal receiver 204 can align and receive the transmission signal of the signal transmitter 203. The conveying assembly 4 includes a drive shaft 401, a support handle 402, a grain pusher 403, and a draining component 404. The drive shaft 401 is rotatably mounted inside the drying chamber of the oven 1, and its ends can be positioned by a stand. The middle section of the drive shaft 401 is threaded, while both ends are smooth. The support handle 402 is fixedly sleeved on the left and right ends of the drive shaft 401, allowing the drive shaft 401 to rotate coaxially with the support handles 402 at both ends. The grain pusher 403 is threaded onto the threaded section of the drive shaft 401, and pushes the grain... The bottom end of the frame 403 is attached to the top wall of the heat-conducting plate 3 and slidably connected thereto. In addition, a dredging component 404 is installed on the grain pusher 403, so that the grain pusher 403, which is slidably set above the heat-conducting plate 3, can move back and forth in the drying chamber as the drive shaft 401 rotates alternately. On the one hand, the grain that has undergone multi-stage drying is pushed from the discharge port of the drying oven 1 into the grain receiving hopper 7. On the other hand, the moving grain pusher 403 carries the dredging component 404 and moves against the bottom wall of the sieve plate 201 to carry out continuous dredging operations. The unblocking component 404 includes a receiving tube 4041, a piston rod 4042, a spring 4043, a crossbeam 4044, and a cleaning head 4045. The receiving tube 4041 is fixedly installed on the grain pusher 403, and the piston rod 4042 is movably inserted into the receiving tube 4041. A spring 4043 is provided between the plug handle of the piston rod 4042 and the bottom wall of the receiving tube 4041. The top of the piston rod 4042 is connected to the cleaning head 4045 through the crossbeam 4044. The elastic force of the spring 4043 is insufficient to support the screen plate 201, so that the cleaning head 4045 can always be attached to the bottom wall of the screen plate 201 under the elastic force of the spring 4043. When aligning with the grain distribution holes of the screen plate 201, the piston rod 4042 can carry the cleaning head 4045 to puncture the grain distribution holes to prevent the screen plate 201 from being blocked and losing its grain distribution ability. The conveying assembly 4 also includes a waste discharge hood 405, which is installed on the outer wall of the oven 1 opposite to the impurity removal assembly 5. The waste discharge hood 405 connects the drying chamber and the waste collection device to receive the separated rice husks. The impurity removal assembly 5 includes a hood 501, an impeller 502, and a first reversible motor 503. The hood 501 is fixedly connected to the side wall of the oven 1 opposite to the waste discharge hood 405. The end of the drive shaft 401 extends into the hood 501 and is fixedly sleeved with the impeller 502. The left side of the impeller 502 is provided with an air intake area located in the inner cavity of the hood 501. In addition, the drive shaft 401 is fixedly connected to the output shaft of the first reversible motor 503 through a coupling. The body of the first reversible motor 503 is installed on the outer wall of the hood 501. The heating component 6 includes a main body 601, a heating plate 602, and a heat-conducting pipe 603. The main body 601 is fixedly installed on the top wall of the grain receiving hopper 7. The heating plate 602 is installed on the upper layer of the main body 601, and the heat-conducting pipe 603 is installed on the lower layer of the main body 601. The heat-conducting pipe 603 is connected to the air intake area of ​​the hood 501 through a conduit, so that the heat-conducting plate 3 can conduct the heat of the heating plate 602 to provide auxiliary heating for the falling grain. The heat-conducting pipe 603 can be continuously heated by the heating plate 602. The external airflow is introduced into the heat-conducting pipe 603 and flows to the air intake area of ​​the hood 501 after heat exchange, so that the impeller 502 can provide hot airflow to the drying chamber. On the one hand, it provides heat for drying the grain, and on the other hand, the airflow can carry away the husks mixed in when the grain is scattered. Finally, the husks are discharged from the drying oven 1 through the waste discharge hood 405, realizing automatic impurity removal of the grain.

[0027] In this embodiment, it should be specifically noted that the surface of the grain separating component 2 is provided with a grain separating hole. The grain separating hole is inverted conical and fits with the cleaning head 4045, so that it can smoothly enter or leave the grain separating hole, making it easy to detach in time after clearing the grain separating hole, and ensuring the normal grain separating capacity of the screen plate 201.

[0028] Reference Figure 1 and Figure 6The waste removal component 8 includes a first rack 801, a scraper 802, a main gear 803, a rotating shaft 804, a second reversible motor 805, a coupled gear set 806, a second rack 807, and a stop plate 808. The scraper 802 and the stop plate 808 are oppositely arranged on the front and rear sides of the oven 1. The scraper 802 is slidably disposed inside the oven 1, and its top is fixedly connected to the first rack 801. The rotating shaft 804, located above the oven 1, is perpendicular to the first rack 801. A main gear 803, meshing with the first rack 801, is fixedly sleeved on the rotating shaft 804. Both ends of the rotating shaft 804 are connected to one of the coupled gear sets 806, and the other gear in the coupled gear set 806 meshes with the second rack 807. The stop plate 808 is fixedly connected to the connecting rod and is slidably disposed outside the waste discharge port of the oven 1. The output shaft of the second reversible motor 805 is fixedly connected to the rotating shaft 804 through a coupling. The body of the second reversible motor 805 is installed on the outer wall of the oven 1. The first rack 801 is rotated by the main gear 803, so that the first rack 801 can carry the scraper 802 to move from front to back along the top wall of the sieve plate 201, pushing the particle impurities remaining on the top wall of the sieve plate 201 to the side of the waste discharge port. At the same time, by means of a set of coupled gears 806 connected to the end of the rotating shaft 804, the second rack 807 can be driven to slide from top to bottom, so that the second rack 807 can carry the stop plate 808 away from the waste discharge port through the connecting rod, thereby realizing the opening of the chamber for waste discharge.

[0029] In this embodiment, it should be specifically noted that the coupled gear set 806 is composed of symmetrically meshing transmission gears and positioning shaft seats, so that the coupled gear set 806, which is coaxial with the main gear 803 and the second rack 807, is in reverse transmission.

[0030] Working principle of this invention: Grain is injected into the tempering layer above the sieve plate 201 through the feed inlet of the oven 1. After the grain is fed, the first reversible motor 503 starts. The output shaft of the first reversible motor 503 drives the transmission shaft 401 connected to it to rotate alternately in the forward and reverse directions through a coupling. The rotating transmission shaft 401 carries the two support handles 402 to rotate coaxially. The rotating support handles 402 will intermittently lift or release the support legs 202 and the sieve plate 201 mounted on top of them, so that the sieve plate 201 slides up and down in the inner cavity of the oven 1 to temper the grain accumulated in the tempering layer. The grain is turned over in a tumbling manner. On the one hand, this allows the heat flow in the drying chamber to enter the tempering layer through the grain distribution holes of the sieve plate 201, which preheats the grain being turned over. On the other hand, it also improves the ability of the grain in the tempering layer to pass through the grain distribution holes of the sieve plate 201 and enter the drying chamber. The grain enters the drying chamber in a continuous quantity and exchanges heat with it, which is the main grain drying step, until it falls onto the upper layer of the heat-conducting plate 3. The heat-conducting plate 3 can conduct the heat of the heating plate 602 to provide the final auxiliary heating for the falling grain, thus realizing multi-stage grain drying process. Meanwhile, the grain pusher 403, which is slidably set above the heat-conducting plate 3, will move back and forth in the drying chamber as the drive shaft 401 rotates alternately in the forward and reverse directions. On the one hand, the moving grain pusher 403 can push the grain falling on the upper layer of the heat-conducting plate 3, and push the grain that has undergone multi-stage drying from the discharge port of the drying oven 1 into the grain receiving hopper 7, and then guide it into the recycling device for collection and processing through the grain receiving hopper 7. On the other hand, the moving grain pusher 403 carries the unblocking part 404 and moves against the bottom wall of the screen plate 201. Under the elastic force of the spring 4043, the piston rod 4042 can carry the cleaning head 4045 to telescopically puncture the grain distribution hole of the screen plate 201 to avoid the screen plate 201 from being blocked and losing its grain distribution ability. Meanwhile, the rotating drive shaft 401 also carries the impeller 502 to rotate coaxially. The rotating impeller 502 draws heat from the heat pipe 603 through the guide tube in the form of vortex flow. The heat pipe 603 can be continuously heated by the heating plate 602. The external airflow is introduced into the heat pipe 603 and flows into the air hood 501 after heat exchange, so that the impeller 502 can provide hot airflow to the drying chamber. On the one hand, it heats the grain, and on the other hand, the airflow can carry away the hulls mixed in when the grain is scattered. Finally, the hulls are discharged from the drying oven 1 through the waste discharge hood 405, realizing the automatic removal of impurities from the grain. When the signal receiver 204 aligns and receives the transmission signal from the signal transmitter 203, and the gravity sensor 205 detects that the load on the sieve plate 201 has reached its set minimum weight threshold, it is determined that the sieve plate 201 is now flush with the bottom edge of the waste discharge port and has completed the separation of grain into the tempering layer. Then, the signal receiver 204 and the gravity sensor 205 output target hit determination information and gravity determination information to the controller 10, respectively. The controller 10 simultaneously receives the target hit determination information and the gravity determination information and outputs control commands to the first reversible motor 503 and the second reversible motor 805, controlling the first reversible motor 503 to stop driving, causing the sieve plate 201 to hover at this position, and controlling the second reversible motor 805 to start... When the second reversible motor 805 is activated, the output shaft drives the rotating shaft 804 and the main gear 803 to rotate coaxially through the coupling, so that the first rack 801 can carry the scraper 802 to move from front to back along the top wall of the screen plate 201, pushing the particle impurities remaining on the top wall of the screen plate 201 to the waste discharge port side. At the same time, by means of a set of coupled gears 806 connected to the end of the rotating shaft 804, the second rack 807 can be driven to slide from top to bottom, so that the second rack 807 can carry the stop plate 808 away from the waste discharge port through the connecting rod, so as to realize the opening of the chamber for waste discharge. After the waste discharge is completed, the output shaft of the second reversible motor 805 reverses the transmission, causing the scraper 802 and the stop plate 808 to reset. The above steps are repeated to achieve an integrated grain drying operation that automatically distributes, clears fallen grain, and intelligently removes impurities from the grain in the drying oven 1.

[0031] The above is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, in accordance with the technical plan and its improved concept, should be included under the protection of the present invention.

Claims

1. A cyclic drying grain dryer, comprising a drying oven (1) and a grain distribution assembly (2) slidably arranged in an inner cavity of the drying oven (1), characterized in that: The grain distribution component (2) divides the interior of the oven (1) into an upper and lower chamber, which are a slow-release layer and a drying chamber, respectively; the bottom wall of the drying chamber is equipped with a heat conducting plate (3), and a conveying component (4) is arranged in the drying chamber and is located between the grain distribution component (2) and the heat conducting plate (3); a heating component (6) is installed at the bottom of the oven (1), and a cleaning component (5) capable of connecting the heating component (6) to the drying chamber is arranged on one side of the oven (1); a waste cleaning component (8) is installed at the top of the oven (1) and is located outside the slow-release layer; and a grain receiving hopper (7) for receiving grain discharged from the oven (1) is installed below the heating component (6); The grain distribution component (2) comprises a sieve plate (201), a support leg (202), a signal transmitter (203), a signal receiver (204) and a gravity sensor (205), wherein the sieve plate (201) is slidably connected to the inside of the oven (1), and the support legs (202) are fixedly installed on the left and right sides of the bottom wall of the sieve plate (201) and are symmetrically distributed, and the support legs (202) are equipped with the signal transmitter (203) and the gravity sensor (205), and the signal receiver (204) is installed on the inner wall of the oven (1), and when the sieve plate (201) rises to be flush with the bottom edge of the waste outlet of the side wall of the oven (1), that is, at the highest point, the signal receiver (204) can align with and receive the transmission signal of the signal transmitter (203); The conveying assembly (4) comprises a transmission shaft (401), a support handle (402), a grain pusher (403) and a dredging member (404), wherein the transmission shaft (401) is rotatably arranged in the drying chamber of the drying oven (1), and the middle section of the transmission shaft (401) is provided with threads while the two ends are smooth, the support handle (402) is fixedly sleeved on the left and right ends of the transmission shaft (401), so that the transmission shaft (401) can cooperate with the support handles (402) at its left and right ends to rotate coaxially, the grain pusher (403) is threadedly sleeved on the threaded section of the transmission shaft (401), and the grain pusher (403) is threadedly sleeved on the threaded section of the transmission shaft (401), and the grain pusher (403) is threadedly sleeved on the threaded section of the transmission shaft (401). The bottom end of the rack (403) is in contact with the top wall of the heat conducting plate (3) and is slidably connected thereto. In addition, a clearing piece (404) is installed on the grain pushing rack (403), so that the grain pushing rack (403) slidably arranged above the heat conducting plate (3) can move back and forth in the drying chamber along with the alternating rotation of the transmission shaft (401). On the one hand, the grain that has been subjected to multi-stage drying is pushed from the discharge port of the drying oven (1) into the grain receiving hopper (7). On the other hand, the moving grain pushing rack (403) carries the clearing piece (404) and moves along the bottom wall of the sieve plate (201) to perform continuous clearing operations.

2. A grain drying machine for circulating drying according to claim 1, characterized in that: The dredging member (404) comprises a storage tube (4041), a piston rod (4042), a spring (4043), a crossbeam (4044) and a cleaning head (4045), wherein the storage tube (4041) is fixedly mounted on the grain pusher (403), and the storage tube (4041) is movably plugged with the piston rod (4042), a spring (4043) is arranged between the plug handle of the piston rod (4042) and the bottom wall of the storage tube (4041), and the piston rod (4043) is arranged between the plug handle of the piston rod (4042) and the bottom wall of the storage tube (4041), and the piston rod (404 2) is connected to a cleaning head (4045) through a crossbeam (4044), wherein the elastic force of the spring (4043) is insufficient to support the sieve plate (201), so that the cleaning head (4045) can always be attached to the bottom wall of the sieve plate (201) and move under the elastic force of the spring (4043). When the grain separation hole of the sieve plate (201) is aligned, the piston rod (4042) can carry the cleaning head (4045) to poke through the grain separation hole to avoid the sieve plate (201) being blocked and losing the grain separation ability.

3. The grain drying machine for circulating drying according to claim 1 is characterized in that: The conveying assembly (4) further comprises a waste discharge hood (405), wherein the waste discharge hood (405) is installed on the outer wall of the drying oven (1) on the opposite side of the impurity removal assembly (5), and the waste discharge hood (405) is connected to the drying chamber and the waste collection device to receive the separated husks.

4. The grain drying machine for circulating drying according to claim 1 is characterized in that: The impurity removal component (5) comprises an air hood (501), an impeller (502) and a first reversible motor (503), wherein the air hood (501) is fixedly connected to a side wall of the oven (1) opposite to the waste exhaust hood (405), an end of the transmission shaft (401) extends into the air hood (501) and is fixedly sleeved with the impeller (502), and an air induction area located in the inner cavity of the air hood (501) is provided on the left side of the impeller (502), and the transmission shaft (401) is fixedly connected to an output shaft of the first reversible motor (503) via a coupling, and a body of the first reversible motor (503) is mounted on the outer wall of the air hood (501).

5. The grain drying machine for circulating drying according to claim 4 is characterized in that: The heating component (6) comprises a main body (601), a heating plate (602) and a heat pipe (603), wherein the main body (601) is fixedly mounted on the top wall of the grain receiving hopper (7), the upper layer of the main body (601) is equipped with a heating plate (602), and the lower layer of the main body (601) is equipped with a heat pipe (603), and the heat pipe (603) is connected to the air induction area of ​​the wind hood (501) through a conduit, so that the heat plate (3) can conduct the heat of the heating plate (602) to provide auxiliary heating for the fallen grain, and the heat pipe (603) is continuously heated by the heating plate (602), and the external air flow is introduced into the heat pipe (603) and flows to the air induction area of ​​the wind hood (501) after heat exchange, so that the impeller (502) can provide hot air flow to the drying chamber.

6. The grain drying machine for circulating drying according to claim 2, characterized in that: A grain distribution hole is provided on the surface of the grain distribution component (2), the grain distribution hole is in an inverted cone shape, and the grain distribution hole fits with the cleaning head (4045) so that it can smoothly enter or leave the grain distribution hole.

7. The grain drying machine for circulating drying according to claim 1, characterized in that: A base (9) is installed at the bottom of the grain receiving hopper (7), and a controller (10) is installed on the base (9). The top wall of the oven (1) is a feed inlet, and the bottom end of the oven (1) is provided with discharge ports located on the left and right sides of the heat conducting plate (3).

8. The grain drying machine for circulating drying according to claim 1, characterized in that: The waste removal assembly (8) comprises a first rack (801), a scraper (802), a main gear (803), a rotating shaft (804), a second reversible motor (805), a coupling gear set (806), a second rack (807) and a cut-off plate (808), wherein the scraper (802) and the cut-off plate (808) are arranged opposite to each other at the front and rear sides of the oven (1), the scraper (802) is slidably arranged in the oven (1), and the top of the scraper (802) is fixedly connected to the first rack (801), the rotating shaft (804) is located above the oven (1) and is perpendicular to the first rack (801), the rotating shaft (804) is fixedly sleeved with a main gear (803) meshing with the first rack (801), and both ends of the rotating shaft (804) are connected to one of the coupling gear sets (806), and the other of the coupling gear sets (806) is meshing with the second rack (807). The second rack (807) is fixedly connected to the stop plate (808) via a connecting rod; the stop plate (808) is slidably arranged outside the waste discharge port of the oven (1); the output shaft of the second reversible motor (805) is fixedly connected to the rotating shaft (804) via a coupling; the body of the second reversible motor (805) is mounted on the outer wall of the oven (1); the first rack (801) is rotated via the main gear (803) so that the first rack (801) can carry the scraper (802) and move along the top wall of the sieve plate (201) from front to back, pushing the granular impurities remaining on the top wall of the sieve plate (201) to the side of the waste discharge port; at the same time, a set of coupled gear sets (806) connected to the end of the rotating shaft (804) can drive the second rack (807) to slide from top to bottom, so that the second rack (807) can carry the stop plate (808) away from the waste discharge port via the connecting rod, and the waste is discharged.

9. The grain drying machine for circulating drying according to claim 8, characterized in that: The coupling gear set (806) is composed of symmetrically meshed transmission gears and a positioning shaft seat, so that the main gear (803) coaxial with the coupling gear set (806) and the coupling gear set (806) meshed with the second rack (807) are in reverse transmission.

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