A grain dryer with cyclic drying

Abstract

The present invention relates to the technical field of grain drying, and discloses a grain dryer with cyclic drying, which includes an oven and a grain distributing assembly slidably arranged in the inner cavity of the oven. The grain distributing assembly divides the inner part of the oven into upper and lower chambers, namely a tempering layer and a drying chamber. A heat conducting plate is assembled on the bottom wall of the drying chamber, and a conveying assembly is arranged in the drying chamber between the grain distributing assembly and the heat conducting plate. A heating assembly is installed at the bottom of the oven, and a dust removing assembly capable of connecting the heating assembly with the drying chamber is arranged on one side of the oven. A waste cleaning assembly located outside the tempering layer is assembled on the top of the oven. A grain receiving hopper for receiving the discharged grain from the oven is installed below the heating assembly; it realizes an integrated grain drying operation of automatically distributing grains, dredging the falling grains and intelligently removing impurities in the oven, that is, while continuously distributing and drying grains, automatically dredging the sieve plate, and taking into account removing the chaff mixed in the grains, ensuring the continuous and efficient operation of the grain drying operation.

Description

Technical Field

[0001] The present invention relates to the technical field of grain drying, and more particularly to a grain dryer with circulating drying. Background Art

[0002] A grain dryer is a device specifically used for drying grains. It can effectively remove the moisture in grains and improve the storage and transportation efficiency of grains. This device usually consists of multiple key parts, including a drying chamber, a heating system, a ventilation system, and a control system, etc. In the agricultural field, the grain dryer plays a crucial role.

[0003] When the dryer is processing a large amount of grains, although its capacity is large, the grains are prone to accumulate in the oven, which reduces the contact area between the hot air flow and the grains. To solve this problem, a sieve plate is usually set in the oven, aiming to slow down the falling speed of the grains and disperse the grains, so that the grains enter the drying chamber in the form of continuous components, increasing the heat exchange area and improving the grain drying effect. However, the sieve holes on the surface of the static sieve plate are easily blocked by chaff or retained grains, affecting the grain drying operation. In addition, after the grain drying is completed, a special impurity removal device needs to be used to remove the chaff mixed in the grains, which undoubtedly increases the production cost of the enterprise.

[0004] Therefore, the present invention proposes a grain dryer with circulating drying to achieve an integrated grain drying operation of automatically distributing grains, dredging the falling grains, and intelligently removing impurities in the oven, that is, while continuously distributing and drying grains, automatically dredging the sieve plate, and taking into account removing the chaff mixed in the grains to ensure 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 grain dryer with circulating drying to solve the problem of how to achieve an integrated grain drying operation of automatically distributing grains, dredging the falling grains, and intelligently removing impurities in the oven, that is, while continuously distributing and drying grains, automatically dredging the sieve plate, and taking into account removing the chaff mixed in the grains to ensure the continuous and efficient operation of the grain drying operation as described in the above background art.

[0006] The present invention provides the following technical solutions: A grain dryer with circulating drying, including an oven and a grain distribution component slidably arranged in the inner cavity of the oven. The grain distribution component divides the inner part of the 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 conduction plate, and a conveying component is arranged in the drying chamber between the grain distribution component and the heat conduction plate. A heating component is installed at the bottom of the oven, and a impurity removal component capable of connecting the heating component and the drying chamber is arranged on one side of the oven. A waste cleaning component is assembled at the top of the oven and located outside the tempering layer. A grain receiving hopper for receiving the discharged grains from the oven is installed below the heating component;

[0007] The grain distribution component includes a sieve plate, support legs, a signal transmitter, a signal receiver, and a gravity sensor. The sieve plate is slidably connected inside the 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, while the signal receiver is assembled on the inner wall of the oven. When the sieve plate rises to be flush with the bottom edge of the waste discharge port on the side wall of the oven, that is, at the highest point, the signal receiver can align with and receive the transmission signal of the signal transmitter.

[0008] The conveying component includes a transmission shaft, a support handle, a grain pushing frame, and a dredging member. The transmission shaft is rotatably arranged in the drying chamber of the oven. The middle section of the transmission shaft is threaded and the two ends are smooth. The support handle is fixedly sleeved on the left and right ends of the transmission shaft, so that the transmission shaft can rotate coaxially with the support handles at its left and right ends. The grain pushing frame is threadedly sleeved on the threaded section of the transmission shaft, and the bottom end of the grain pushing frame fits against and is slidably connected to the top wall of the heat conducting plate. In addition, a dredging member is installed on the grain pushing frame, so that the grain pushing frame slidably arranged above the heat conducting plate can move left and right reciprocally in the drying chamber as the transmission shaft rotates alternately. On the one hand, the grains that have undergone multi-stage drying are pushed into the grain receiving hopper from the discharge port of the oven. On the other hand, the moving grain pushing frame carries the dredging member and moves along the bottom wall of the sieve plate to perform continuous dredging operations.

[0009] Further, the dredging member includes a receiving pipe, a piston rod, a spring, a cross beam, and a cleaning head. The receiving pipe is fixedly installed on the grain pushing frame, and the piston rod is movably inserted into the receiving pipe. A spring is arranged between the plug handle of the piston rod and the bottom wall of the receiving pipe, and the top end of the piston rod is connected to the cleaning head through a cross beam. The elastic force of the spring is not enough to support the sieve plate, so that the cleaning head can always move along the bottom wall of the sieve plate under the action of the elastic force of the spring. When aligning with the grain distribution holes of the sieve plate, the piston rod can carry the cleaning head to pierce through the grain distribution holes to prevent the sieve plate from being blocked and losing its grain distribution ability.

[0010] Further, the conveying component also includes a waste discharge cover. The waste discharge cover is installed on the outer wall of the oven on the opposite side of the impurity removal component. The waste discharge cover connects the drying chamber and the waste collection device to receive the separated chaff.

[0011] Further, the impurity removal component includes a wind cover, an impeller, and a first reversible motor. The wind cover is fixedly connected to the side wall of the oven opposite to the waste discharge cover. The end of the transmission shaft extends into the wind cover and is fixedly sleeved with the impeller. There is an air guiding area located in the inner cavity of the wind cover on the left side of the impeller. In addition, the transmission shaft is fixedly connected to the output shaft of the first reversible motor through a coupling, and the body of the first reversible motor is installed on the outer wall of the wind cover.

[0012] Furthermore, the heating component includes a main body, a heating plate and a heat conduction tube. The main body is fixedly installed on the top wall of the grain receiving hopper. The heating plate is assembled on the upper layer of the main body, and the heat conduction tube is assembled on the lower layer of the main body. The heat conduction tube is connected to the air inlet area of the air hood through a conduit, so that the heat conduction plate can conduct the heat of the heating plate to supplement the heat of the falling grain. The heat conduction tube is continuously heated by the heating plate, and the external air flow is introduced into the heat conduction tube and rushes to the air inlet area of the air hood after heat exchange, so that the impeller can provide hot air flow to the drying chamber.

[0013] Furthermore, the surface of the grain distributing component is provided with grain distributing holes. The grain distributing holes are inverted cones, and the grain distributing holes are fitted with the cleaning heads so that they can smoothly enter or exit the grain distributing holes.

[0014] Furthermore, a base is installed at the bottom of the grain receiving hopper, and a controller is assembled on the base. The top wall of the oven is the feed inlet, and the bottom end of the oven is provided with discharge outlets located on the left and right sides of the heat conduction plate.

[0015] Furthermore, the waste cleaning component includes a first rack, a scraper, a main gear, a rotating shaft, a second reversible motor, a coupling gear set, a second rack and a cut-off plate. The scraper and the cut-off plate are oppositely arranged on the front and rear sides of the oven. The scraper is slidably arranged in the oven, and the top of the scraper is fixedly connected to the first rack. The rotating shaft above the oven is perpendicular to the first rack. The 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 branch of the coupling gear set, and the other branch of the coupling gear set meshes with the second rack. The second rack is fixedly connected to the cut-off plate through a connecting rod. The cut-off plate is slidably arranged 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. By rotating the first rack through the main gear, the first rack can carry the scraper to move backward along the top wall of the sieve plate from front to back, and push the residual granular impurities on the top wall of the sieve plate to one side of the waste discharge port. At the same time, by virtue of a set of coupling gear sets 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 cut-off plate away from the waste discharge port through the connecting rod to open the chamber for waste discharge.

[0016] Furthermore, the coupling gear set is composed of symmetrically meshing transmission gears and positioning shaft seats, so that the coupling gear set in which the main gear coaxial with the coupling gear set meshes with the second rack is in reverse transmission.

[0017] The technical effects and advantages of the present invention:

[0018] The present invention is provided with a grain distributing component, a conveying component and a cleaning component, which is conducive to the first reversible motor driving the transmission shaft and the left and right support handles to rotate coaxially. The rotating support handle intermittently jacks up the support legs and the sieve plate assembled on the top thereof, so that the sieve plate slides up and down reciprocally to jolt and turn the grains piled up in the tempering layer. On the one hand, the grains are turned over for preliminary preheating, and on the other hand, the discharging capacity of the grains in the tempering layer is improved. At the same time, the grain pushing frame slidably arranged above the heat conducting plate will reciprocate left and right in the drying chamber along with the alternating self-rotation of the transmission shaft. On the one hand, the grains subjected to multi-stage drying treatment are pushed from the discharge port of the oven into the grain receiving hopper. On the other hand, the moving grain pushing frame carries the dredging member to move attached to the bottom wall of the sieve plate. Under the elastic force of the spring, the piston rod can carry the cleaning head to telescopically pierce through the grain distributing holes to prevent the sieve plate from being blocked and losing the grain distributing capacity. At the same time, the rotating transmission shaft also carries the impeller to rotate coaxially. The rotating impeller extracts the heat flow provided by the heat conducting pipe in a vortex drainage manner. On the one hand, it supplies heat for drying the grains, and on the other hand, the air flow can carry away the chaff mixed when the grains are distributed, realizing automatic impurity removal of the grains. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure and its partial section of the present invention.

[0021] Figure 3 It is a schematic diagram of the cross-section of the oven of the present invention and its internal connection structure.

[0022] Figure 4 It is a schematic diagram of the connection structure of the grain distributing component, the conveying component and the heating component of the present invention.

[0023] Figure 5 For the present invention Figure 4 Structure diagram at position A.

[0024] Figure 6 It is a schematic diagram of the connection structure of the oven and the waste cleaning component of the present invention.

[0025] The reference numerals are: 1, oven; 2, grain distributing assembly; 201, sieve plate; 202, support leg; 203, signal transmitter; 204, signal receiver; 205, gravity sensor; 3, heat conducting plate; 4, conveying assembly; 401, transmission shaft; 402, support handle; 403, grain pushing frame; 404, dredging member; 4041, receiving pipe; 4042, piston rod; 4043, spring; 4044, cross beam; 4045, cleaning head; 405, waste discharging cover; 5, impurity removing assembly; 501, air hood; 502, impeller; 503, first reversible motor; 6, heating assembly; 601, main body; 602, heating plate; 603, heat conducting pipe; 7, grain receiving hopper; 8, waste cleaning 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 mode

[0026] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the drawings in the present invention. In addition, the forms of each structure described in the following implementation modes are only examples. A grain dryer with cyclic drying involved in the present invention is not limited to the structures described in the following implementation modes. All other implementation modes obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0027] Referring to Figures 1-6 , the present invention provides a grain dryer with cyclic drying, including an oven 1 and a grain distributing assembly 2 slidably arranged in the inner cavity of the oven 1. The grain distributing assembly 2 divides the inner part of the oven 1 into upper and lower chambers, namely a tempering layer and a drying chamber. A heat conducting plate 3 is assembled on the bottom wall of the drying chamber, and a conveying assembly 4 is arranged in the drying chamber between the grain distributing assembly 2 and the heat conducting plate 3. The conveying assembly 4 can push the grain distributing assembly 2 to move up and down periodically during transmission to perform continuous grain distributing and drying operations, and at the same time perform automatic dredging treatment on the grain distributing assembly 2. A heating assembly 6 is installed at the bottom of the oven 1, and an impurity removing assembly 5 capable of connecting the heating assembly 6 with the drying chamber is arranged on one side of the oven 1. A waste cleaning assembly 8 located outside the tempering layer is assembled on the top of the oven 1. The waste cleaning assembly 8 can discharge waste by opening the cabin for the grain distributing assembly 2 reaching the tempering layer during transmission. A grain receiving hopper 7 for receiving the discharged grain from the oven 1 is installed below the heating assembly 6.

[0028] 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 assembled on the base 9 to receive the determination information output by the signal receiver 204 and the gravity sensor 205, and output control instructions for the actuator through analysis and processing;

[0029] The top wall of the oven 1 is the feed inlet, which can be connected to the grain unloading device. The bottom end of the oven 1 is provided with discharge outlets on the left and right sides of the heat conduction plate 3. The left and right movement of the grain pushing frame 403 can push the grains after multi-stage drying treatment from the discharge outlet of the oven 1 into the grain receiving hopper 7, and then collect and process them through the grain receiving hopper 7 and introduce them into the recycling device.

[0030] Referring to Figures 2-5 , the grain distributing 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. Symmetrically distributed support legs 202 are fixedly installed on the left and right sides of the bottom wall of the sieve plate 201. The rotating support handle 402 intermittently jacks up the support legs 202 and the sieve plate 201 assembled on top of them, so that the sieve plate 201 slides up and down reciprocally to jolt and turn the grains piled up in the tempering layer. On the one hand, it turns the grains for preliminary preheating, and on the other hand, it also improves the discharging capacity of the grains in the tempering layer. The signal transmitter 203 and the gravity sensor 205 are assembled inside the support legs 202, while the signal receiver 204 is assembled 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 with and receive the emission signal of the signal transmitter 203;

[0031] The conveying component 4 includes a transmission shaft 401, a support handle 402, a grain pushing frame 403 and a dredging member 404. The transmission shaft 401 is rotatably arranged in the drying chamber of the oven 1, and its end can be positioned by a vertical frame. The middle section of the transmission shaft 401 is threaded and 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 rotate coaxially with the support handles 402 at its left and right ends. The grain pushing frame 403 is threadedly sleeved on the threaded section of the transmission shaft 401, and the bottom end of the grain pushing frame 403 fits against the top wall of the heat conduction plate 3 and is slidably connected to it. In addition, a dredging member 404 is installed on the grain pushing frame 403, so that the grain pushing frame 403 slidably arranged above the heat conduction plate 3 can move left and right reciprocally in the drying chamber as the transmission shaft 401 alternately spins. On the one hand, it pushes the grains after multi-stage drying treatment from the discharge outlet of the oven 1 into the grain receiving hopper 7, and on the other hand, the moving grain pushing frame 403 carries the dredging member 404 and moves along the bottom wall of the sieve plate 201 for continuous dredging operations;

[0032] The dredging member 404 includes 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 installed on the grain pushing rack 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 top of the piston rod 4042 is connected with the cleaning head 4045 through the crossbeam 4044, wherein the elastic force of the spring 4043 is not enough 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, and when aligning with the grain separation hole of the sieve plate 201, 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;

[0033] The conveying assembly 4 further comprises a waste discharge cover 405, which is mounted on the outer wall of the oven 1 on the opposite side of the impurity removal assembly 5, and the waste discharge cover 405 is connected to the drying chamber and the waste collection device to receive the separated husks;

[0034] The impurity removal component 5 includes an air hood 501, an impeller 502 and a first reversible motor 503, wherein the air hood 501 is fixedly connected to the side wall of the oven 1 opposite to the exhaust hood 405, the end of the transmission shaft 401 extends into the air hood 501 and is fixedly sleeved with the impeller 502, and the left side of the impeller 502 is provided with an air induction area located in the inner cavity of the air hood 501, in addition, the transmission shaft 401 is fixedly connected to the output shaft of the first reversible motor 503 through a coupling, and the body of the first reversible motor 503 is installed on the outer wall of the air hood 501;

[0035] The heating component 6 includes a main body 601, a heating plate 602 and a heat pipe 603, wherein the main body 601 is fixedly installed 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 can be continuously heated by the heating plate 602, and the external airflow is introduced into the heat pipe 603 and rushes to the air induction area of ​​the wind hood 501 after heat exchange, so that the impeller 502 can provide hot airflow to the drying chamber, on the one hand, to provide heat for the dried grain, and on the other hand, the airflow can take away the husks mixed in when the grain is scattered, and finally the husks are discharged from the drying oven 1 through the waste cover 405, so as to realize automatic impurity removal of the grain.

[0036] In this embodiment, it should be specifically explained that a grain distribution hole is opened on the surface of the grain distribution component 2, and the grain distribution hole is an inverted cone, and the grain distribution hole is matched with the cleaning head 4045, so that it can smoothly enter or leave the grain distribution hole, and it is convenient to dredge the grain distribution hole and leave it in time, so as to ensure the normal grain distribution ability of the screen plate 201.

[0037] ReferenceFigure 1 and Figure 6 , the 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 coupling gear set 806, a second rack 807 and a cut-off plate 808. The scraper 802 and the cut-off plate 808 are oppositely arranged on 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 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 branch of the coupling gear set 806, and the other branch of the coupling gear set 806 meshes with the second rack 807. The second rack 807 is fixedly connected to the cut-off plate 808 through a connecting rod. The cut-off 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 through a coupling. The body of the second reversible motor 805 is installed on the outer wall of the oven 1. By rotating the first rack 801 through the main gear 803, the first rack 801 can carry the scraper 802 to move backward from front to back along the top wall of the sieve plate 201, pushing the granular impurities remaining on the top wall of the sieve plate 201 to one side of the waste discharge port. At the same time, by virtue of a set of coupling gear sets 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 cut-off plate 808 away from the waste discharge port through the connecting rod to realize waste discharge when the cabin is opened.

[0038] In this embodiment, it should be specifically noted that the coupling gear set 806 is composed of symmetrically meshing transmission gears and positioning shaft seats, so that the coupling gear set 806 where the main gear 803 coaxial with the coupling gear set 806 meshes with the second rack 807 performs reverse transmission.

[0039] The working principle of the present invention:

[0040] The grain is injected into the tempering layer above the sieve plate 201 through the feed inlet of the oven 1. After the grain feeding is completed, the first reversible motor 503 is started. The output shaft of the first reversible motor 503 drives the coaxial rotation of the drive shaft 401 connected to it in a positive and negative alternating manner through a coupling. The rotating drive shaft 401 drives the left and right support handles 402 to rotate coaxially. The rotating support handle 402 intermittently jacks up or releases the support legs 202 and the sieve plate 201 assembled on top of them, so that the sieve plate 201 slides up and down reciprocally in the inner cavity of the oven 1 to tumble the grain piled up in the tempering layer. On the one hand, the heat flow in the drying chamber can enter the tempering layer through the grain distribution holes of the sieve plate 201 to preliminarily preheat the tumbling grain therein. On the other hand, it also improves the falling 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 is distributed into the drying chamber in the form of continuous components and exchanges heat with it, which is the main grain drying step until it falls on the upper layer of the heat conduction plate 3. The heat conduction plate 3 can conduct the heat of the heating plate 602 to provide final auxiliary heating for the falling grain, realizing multi-stage grain drying treatment;

[0041] At the same time, the grain pushing frame 403 slidably arranged above the heat conduction plate 3 will reciprocate left and right in the drying chamber with the positive and negative alternating rotation of the drive shaft 401. On the one hand, the moving grain pushing frame 403 can push the grain falling on the upper layer of the heat conduction plate 3, and push the grain after multi-stage drying treatment from the discharge outlet of the oven 1 into the grain receiving hopper 7, and then collect and process it through the grain receiving hopper 7 and introduce it into the recycling device. On the other hand, the moving grain pushing frame 403 carries the dredging part 404 and moves along the bottom wall of the sieve plate 201. Under the elastic force of the spring 4043, the piston rod 4042 can carry the cleaning head 4045 to telescopically pierce through the grain distribution holes of the sieve plate 201 to prevent the sieve plate 201 from being blocked and losing the grain distribution ability;

[0042] At the same time, the rotating drive shaft 401 also drives the impeller 502 to rotate coaxially. The rotating impeller 502 extracts the heat flow provided by the heat conduction pipe 603 in a vortex drainage manner through the conduit. The heat conduction pipe 603 can be continuously heated by the heating plate 602. The outside air flow is introduced into the heat conduction pipe 603 and rushes into the air hood 501 after heat exchange, so that the impeller 502 can provide hot air flow for the drying chamber. On the one hand, it provides heat for drying the grain. On the other hand, the air flow can carry away the chaff mixed during the grain distribution. Finally, the chaff is discharged from the oven 1 through the waste discharge hood 405, realizing automatic impurity removal of the grain;

[0043] When the signal receiver 204 aligns with and receives the transmitted signal of the signal transmitter 203, and the gravity sensor 205 detects that the load on the sieve plate 201 reaches the set minimum weight threshold, it is determined that the sieve plate 201 is flush with the bottom edge of the waste discharge port and the slow-release layer grain distribution is completed. Then, the signal receiver 204 and the gravity sensor 205 respectively send the target-hitting determination information and the gravity determination information to the controller 10. The controller 10 simultaneously receives the target-hitting and gravity determination information and outputs control instructions for the first reversible motor 503 and the second reversible motor 805, controlling the first reversible motor 503 to stop driving, so that the sieve plate 201 hovers here, and controlling the second reversible motor 805 to start. The output shaft of the second reversible motor 805 drives the rotating shaft 804 and the main gear 803 to rotate coaxially through a coupling, so that the first rack 801 can carry the scraper 802 to move backward along the top wall of the sieve plate 201, 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, by virtue of a set of coupling gear sets 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 cut-off plate 808 away from the waste discharge port through a connecting rod to realize opening the cabin for waste discharge. After the waste discharge is completed, the output shaft of the second reversible motor 805 drives in the reverse direction, causing the scraper 802 and the cut-off plate 808 to reset;

[0044] The above steps are cyclically executed to realize the integrated baking operation of automatically distributing grains, dredging grain falling, and intelligently removing impurities in the oven 1.

[0045] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention; equivalent substitutions or modifications are made according to the technical plan and its improvement concept of the present invention, and these should all 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 assembly (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 symmetrically fixedly installed on the left and right sides of the bottom wall of the sieve plate (201), the signal transmitter (203) and the gravity sensor (205) are installed in the support legs (202), and the signal receiver (204) is installed on the inner wall of the oven (1). When the sieve plate (201) rises to the point where it is flush with the bottom edge of the waste outlet of the side wall of the oven (1), that is, the highest At the point, the signal receiver (204) can align with and receive the transmission signal of the signal transmitter (203); the conveying component (4) includes a transmission shaft (401), a support handle (402), a grain pusher (403) and a clearing piece (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 a thread 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, and the grain pusher (403) is threadedly sleeved. The grain pusher (403) is connected to the threaded section of the transmission shaft (401), and the bottom end of the grain pusher (403) is in contact with the top wall of the heat conducting plate (3) and is slidably connected thereto. In addition, a dredging member (404) is installed on the grain pusher (403), so that the grain pusher (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 pusher (403) carries the dredging member (404) and moves in contact with the bottom wall of the sieve plate (201) to perform continuous dredging operations. 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) at the top 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), and when aligned with the grain separation hole of the sieve plate (201), the piston rod (4042) can carry the cleaning head (4045) to poke through the grain separation hole, so as to avoid the sieve plate (201) being blocked and losing the grain separation ability; 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; 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); 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), and the first rack (801) is rotated via the main gear (803), so that the first rack (801) can carry the scraper (802) to move along the top wall of the sieve plate (201) from front to back, and push 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; 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.

2. A grain drying machine for circulating drying according to claim 1, 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.

3. The grain drying machine for circulating drying according to claim 1 is 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.

4. The grain drying machine for circulating drying according to claim 1 is 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).

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