A circulating lifting device for grain drying machine

Abstract

The invention relates to the technical field of grain dryers and discloses a circulating lifting device for a grain dryer, comprising an oven and a supporting frame fixedly installed under the oven, wherein a controller is installed on the supporting frame, a bulk grain assembly and a grain taking assembly distributed up and down are installed on the left side of an inner cavity of the oven, and a transmission assembly and a grain transfer assembly are installed on the right side of the inner cavity of the oven, wherein the transmission assembly is used for transmitting the grain taking assembly, the bulk grain assembly and the grain transfer assembly to respectively perform grain dividing operation, grain transportation operation and grain bulking operation; the grain taken from a grain taking box is dumped into the inner cavity of a grain transfer hopper by a grain guide plate, and then a guide block connected to a rotation of an outer ring of a rotating handle carried by a transmission shaft rotates to the rightmost end, and a push rod pushes a balancing block, so that the grain transfer hopper can be tilted toward one side of a bulk grain tray with a rotating shaft as an axis, so that the divided grain in the grain transfer hopper is discharged into the bulk grain tray, and the grain scraper plate can sweep from right to left along the sliding of the bulk grain tray to realize grain dividing and transportation, so as to realize the lifting, turning and dispersing of the grain in the oven.

Description

Technical Field

[0001] The invention relates to the technical field of grain dryers, and more specifically to a circulation lifting device for grain dryers. Background Art

[0002] Grain dryer is a kind of equipment specially used for drying grains. It can effectively remove moisture from grains and improve the storage and transportation efficiency of grains. This equipment is usually composed of drying room, heating system, ventilation system, control system and other parts. In the agricultural field, grain dryer plays a vital role. It can not only significantly improve the storage safety and shelf life of grains, but also effectively reduce the loss of grains caused by weather changes.

[0003] When the dryer processes a large amount of grain, despite its large capacity, the grain is easy to accumulate in the oven, which reduces the contact area between the hot air flow and the grain. In order to solve this problem, a circulating lifting device is usually installed in the oven to continuously turn the grain to increase the heat exchange area. In this process, the lifting device can be used to hold the grain at the bottom of the dryer and pour it at the highest point. Although the grain is turned, the grain is dumped in a concentrated manner at the highest point, which makes the grain particles not dispersed enough, and the drying method is relatively single. The drying efficiency and energy utilization rate need to be further improved.

[0004] Therefore, the present invention proposes a circulating lifting device for a grain dryer to achieve lifting, turning and dispersing of grain in a drying oven, that is, a multi-stage drying mechanism to improve the efficiency and energy utilization of grain drying. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a circulating lifting device for a grain dryer to solve the problem existing in the above-mentioned background technology of how to realize the lifting, turning and dispersing processing of grain in the oven, that is, a multi-stage drying mechanism, so as to improve the grain drying efficiency and energy utilization rate.

[0006] The present invention provides the following technical solution: a circulating lifting device for a grain dryer, comprising an oven and a support frame fixedly installed below the oven, the support frame being equipped with a controller, the left side of the inner cavity of the oven being equipped with a bulk grain assembly and a grain taking assembly distributed up and down, and the right side of the inner cavity of the oven being equipped with a transmission assembly and a grain transfer assembly, the transmission assembly being used to drive the grain taking assembly, the bulk grain assembly and the grain transfer assembly to respectively perform grain separation operations, bulk grain operations and grain transportation operations, and the outer side wall of the oven being equipped with a circulating air blowing assembly;

[0007] The grain taking assembly comprises a grain storage tank, a roller frame and a grain taking box, wherein the grain storage tank is fixedly assembled at the lower left corner of the inner cavity of the oven, and a roller frame is rotatably arranged in the inner cavity of the grain storage tank, and the outer periphery of the roller frame is fixedly connected with grain taking boxes distributed in a circumference;

[0008] The transmission assembly includes a driving wheel, a driven wheel, a transmission shaft, a positioning shaft, a transmission belt and a chain belt, wherein the left and right driving wheels are coaxially connected to the drum frame and the driven wheel through the transmission shaft and the positioning shaft respectively, the left and right driving wheels on the same side are connected by a transmission belt, and the upper and lower driven wheels on the same side are connected by a chain belt;

[0009] The grain transfer assembly comprises a grain transfer hopper, a grain guide plate, a limit rod, a spring, a rotating shaft and a balancing block, wherein the upper layer of the grain transfer hopper is slidably connected to an inclined grain guide plate, the bottom ends of the grain guide plates are fixedly connected to limit rods on both sides, the limit rods are connected to the inclined grooves of the side walls of the grain transfer hopper through spring transmission, the grain transfer hopper is rotatably connected between the front and rear two chain belts through a rotating shaft, and a balancing block is fixedly installed at the bottom of the grain transfer hopper;

[0010] The bulk grain assembly includes a bulk grain tray, a grain scraper plate, a push rod, a rocker arm, a rotating handle, a guide block, a vertical plate and a base shaft, wherein the bulk grain tray is fixedly installed in the upper inner cavity of the oven, and a grain scraper plate is slidably arranged in the bulk grain tray, the outside of the grain scraper plate is fixedly connected to a push rod located below the bulk grain tray, the end of the grain scraper plate is rotatably connected to the top end of the rocker arm, and the bottom end of the rocker arm is rotatably connected to the vertical plate with the base shaft as the axis, the rotating handle is coaxially arranged with the transmission shaft, the outer ring of the rotating handle is rotatably connected to the guide block, and the guide block is slidably arranged in the slide rail of the rocker arm.

[0011] Furthermore, the longitudinal section of the grain storage trough is a 1 / 2 arc, the grain storage trough, the drum frame and the grain taking box are coaxially arranged, and the outer edge of the grain taking box is fitted with the inner wall of the grain storage trough, so that the grain taking box can move along the arc inner wall of the grain storage trough.

[0012] Furthermore, the transmission shaft and the positioning shaft rotate and penetrate the side wall of the oven, and the connection is sealed by a rubber ring, and the transmission shaft is connected to the output end of the power source.

[0013] Furthermore, the belt width of the chain belt is greater than the groove depth of the driven wheel, and the outer edge of the chain belt is at least large enough for the rotating shaft to pass through, and the rotating shaft does not touch the outer edge of the driven wheel during the movement of the chain belt.

[0014] Furthermore, the grain transfer assembly also includes an inclined plate obliquely installed in the middle of the inner cavity of the grain transfer hopper, the lower half of the grain guide plate and the entire inclined plate surface are provided with sieve holes for grain particles to pass through, and the side wall of the grain transfer hopper between the grain guide plate and the inclined plate is provided with a grain outlet, wherein the side of the inclined plate away from the grain outlet is fixedly connected to the inner wall of the grain transfer hopper, and a gap for grain discharge is left between the side close to the grain outlet and the inner wall of the grain transfer hopper.

[0015] Furthermore, the circulating air blowing assembly includes a circulating fan, an air inlet pipe, an exhaust pipe and a jet pipe, wherein the circulating fan is installed on the outer wall of the oven, the air inlet and exhaust ends of the circulating fan are respectively connected to the air inlet pipe and the exhaust pipe, the exhaust pipe is fixedly connected to the jet pipe, the jet pipe is directly opposite to the ventilation groove on the side wall of the grain hopper, the ventilation groove is located above the grain guide plate and the inclined plate, and the bottom of the oven is equipped with a device for receiving husks.

[0016] Furthermore, the top wall of the oven is connected to a grain injection pipe located directly above the bulk grain tray, the bottom wall of the oven is connected to a grain discharge pipe, a cut-off assembly is provided between the grain discharge pipe and the grain storage trough, the cut-off assembly includes a cut-off plate and a cylinder, wherein the cut-off plate is slidably provided in a channel at the bottom of the grain storage trough, and the telescopic end of the cylinder is fixedly connected to the cut-off plate.

[0017] Technical effects and advantages of the present invention:

[0018] The present invention is provided with a grain taking component and a bulk grain component and a transmission component and a grain transfer component, which is conducive to the transmission shaft carrying the roller frame and the grain taking box to rotate coaxially, so that the grain taking box can hold the stored grain in the inner cavity of the grain storage tank and transfer it outward, and the chain belt carries the grain transfer component to step under the drive of the driven wheel until the grain taking box filled with grain flips downward from the highest point, and then a group of grain transfer components just reaches the lower right side thereof, and then the grain guide plate and the grain taking box contact and retract and move again, during which the grain held in the grain taking box will be dumped by the grain guide plate into the inner cavity of the grain transfer hopper, thereby achieving The grain is now transported in batches, and the transmission shaft carries the guide block connected to the outer ring of the rotating handle to rotate to the rightmost end. The push rod pushes the balance block, so that the grain hopper can tilt toward the side of the bulk grain tray with the rotating shaft as the axis, causing the divided grain in the grain hopper to be discharged into the bulk grain tray. As the swing arm swings back to the left, the grain scraper plate connected to the top of the swing arm can sweep from right to left along the sliding of the bulk grain tray. During this period, the grain particles will pass through the sieve holes on the bottom wall of the bulk grain tray and fall into the grain storage trough. When returning the grain, the grain particles are dispersed, so that the grain particles are fully in contact with the hot air in the oven, thereby improving the grain drying efficiency. 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 of the present invention and its partial cross-section.

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

[0022] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0023] Figure 5It is a schematic diagram of the transmission structure of the grain taking component, the grain dispersing component, the transmission component and the grain transferring component of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the grain transfer component of the present invention.

[0025] The accompanying drawings are marked as follows: 1, oven; 2, support frame; 3, grain taking assembly; 301, grain storage tank; 302, roller frame; 303, grain taking box; 4, bulk grain assembly; 401, bulk grain plate; 402, grain scraping plate; 403, push rod; 404, swing rod; 405, handle; 406, guide block; 407, vertical plate; 408, base shaft; 5, transmission assembly; 501, driving wheel; 502, driven wheel; 503, transmission shaft; 504, Positioning shaft; 505, transmission belt; 506, chain belt; 6, grain transfer assembly; 601, grain transfer hopper; 602, grain guide plate; 603, limit rod; 604, spring; 605, rotating shaft; 606, balance block; 607, inclined plate; 7, circulating air blowing assembly; 701, circulating fan; 702, air inlet pipe; 703, exhaust pipe; 704, jet pipe; 8, interception assembly; 801, interception plate; 802, cylinder; 9, controller. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The circulating lifting device for a grain dryer involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0027] Reference Figure 1-6 The present invention provides a circulating lifting device for a grain dryer, comprising an oven 1 and a support frame 2 fixedly installed under the oven 1, a controller 9 is installed on the support frame 2, a bulk grain component 4 and a grain taking component 3 distributed up and down are installed on the left side of the inner cavity of the oven 1, and a transmission component 5 and a grain transfer component 6 are installed on the right side of the inner cavity of the oven 1, the transmission component 5 is used to drive the grain taking component 3, the bulk grain component 4 and the grain transfer component 6 to respectively perform grain separation operations, bulk grain operations and grain transportation operations, and through the cooperation of the three, the lifting, turning and dispersing processing of the grain in the oven is realized, that is, a multi-stage drying mechanism, so as to improve the efficiency of grain drying and energy utilization rate, and the outer wall of the oven 1 is equipped with a circulating blowing component 7.

[0028] In this embodiment, it should be specifically explained that the top wall of the oven 1 is connected to a grain injection pipe located directly above the bulk grain tray 401, and the bottom wall of the oven 1 is connected to a grain discharge pipe, and an interception assembly 8 is arranged between the grain discharge pipe and the grain storage trough 301, and the interception assembly 8 includes an interception plate 801 and a cylinder 802, wherein the interception plate 801 is slidably arranged in a channel at the bottom of the grain storage trough 301, and the telescopic end of the cylinder 802 is fixedly connected to the interception plate 801, and the telescopic end of the cylinder 802 can carry the interception plate 801 to the arc mouth below the grain storage trough 301 to perform opening and closing movements, so as to regulate the storage and unloading of grain in the grain storage trough 301; in addition, when the interception plate 801 is fitted with the arc mouth, the inner wall of the grain storage trough 301 and the top wall of the interception plate 801 are constructed as a smooth arc surface to avoid interfering with the movement trajectory of the grain box 303 when flipping and taking grain.

[0029] Reference Figure 2-6 The grain taking component 3 includes a grain storage tank 301, a roller frame 302 and a grain taking box 303, wherein the grain storage tank 301 is fixedly assembled at the lower left corner of the inner cavity of the oven 1, and the inner cavity of the grain storage tank 301 is rotatably provided with a roller frame 302, and the outer periphery of the roller frame 302 is fixedly connected with circumferentially distributed grain taking boxes 303, and the transmission shaft 503 can carry the roller frame 302 and the grain taking box 303 to rotate coaxially, so that the grain taking box 303 can hold the stored grain in the inner cavity of the grain storage tank 301 and transfer it outward;

[0030] The transmission assembly 5 includes a driving wheel 501, a driven wheel 502, a transmission shaft 503, a positioning shaft 504, a transmission belt 505 and a chain belt 506, wherein the left and right groups of driving wheels 501 are coaxially connected to the drum frame 302 and the driven wheel 502 through the transmission shaft 503 and the positioning shaft 504 respectively, the left and right driving wheels 501 on the same side are connected by the transmission belt 505, and the upper and lower driven wheels 502 on the same side are connected by the chain belt 506. The driving wheel 501 mounted on the transmission shaft 503 can drive the driving wheel 501 and the driven wheel 502 mounted on the positioning shaft 504 to rotate coaxially through the transmission belt 505, and the two driven wheels 502 on the same side are connected by the chain belt 506, so that the front and rear chain belts 506 carry the grain transfer assembly 6 to step under the drive of the driven wheel 502;

[0031] The grain transfer assembly 6 comprises a grain transfer hopper 601, a grain guide plate 602, a limit rod 603, a spring 604, a rotating shaft 605 and a balancing block 606, wherein the upper layer of the grain transfer hopper 601 is slidably connected with an inclined grain guide plate 602, and the bottom ends of the grain guide plate 602 are fixedly connected with limit rods 603, and the limit rods 603 are connected to the inclined groove of the side wall of the grain transfer hopper 601 through the spring 604. The grain transfer hopper 601 is rotatably connected between the front and rear two chain belts 506 through the rotating shaft 605, and a balancing block 606 is fixedly installed at the bottom of the grain transfer hopper 601. When the grain box 303 filled with grain is turned down from the highest point, a group of grain transfer assemblies 6 just reaches the lower right side thereof, and then the grain guide plate 602 and the grain box 303 contact and telescopically move, during which the grain in the grain box 303 will be dumped by the grain guide plate 602 into the inner cavity of the grain transfer hopper 601, thereby realizing grain distribution and transportation;

[0032] The bulk grain assembly 4 includes a bulk grain tray 401, a grain scraping plate 402, a push rod 403, a swing rod 404, a rotating handle 405, a guide block 406, a vertical plate 407 and a base shaft 408, wherein the bulk grain tray 401 is fixedly installed in the upper inner cavity of the oven 1, and a grain scraping plate 402 is slidably arranged in the bulk grain tray 401, the outside of the grain scraping plate 402 is fixedly connected to a push rod 403 located below the bulk grain tray 401, the end of the grain scraping plate 402 is rotatably connected to the top of the swing rod 404, the bottom end of the swing rod 404 is rotatably connected to the vertical plate 407 with the base shaft 408 as the axis, the rotating handle 405 is coaxially arranged with the transmission shaft 503, the outer ring of the rotating handle 405 is rotatably connected to the guide block 406, and the guide block 406 is slidably arranged on In the slide rail of the swing rod 404, the transmission shaft 503 can carry the guide block 406 connected to the outer ring of the rotating handle 405 to rotate to the rightmost end, and the push rod 403 pushes the balance block 606, so that the grain hopper 601 can tilt toward the side of the bulk grain tray 401 with the rotating shaft 605 as the axis, so that the divided grain in the grain hopper 601 is discharged into the bulk grain tray 401. As the swing rod 404 swings back to the left, the grain scraper plate 402 connected to the top of the swing rod 404 can sweep from right to left along the sliding of the bulk grain tray 401. During this period, the grain particles will pass through the sieve holes on the bottom wall of the bulk grain tray 401 and fall into the grain storage tank 301. When returning the grain, the grain particles are dispersed, so that the grain particles are fully in contact with the hot air in the oven 1, thereby improving the grain drying efficiency.

[0033] In this embodiment, it should be specifically explained that the longitudinal section of the grain storage tank 301 is a 1 / 2 arc, the grain storage tank 301, the roller frame 302 and the grain taking box 303 are coaxially arranged, and the outer edge of the grain taking box 303 is cut with the inner wall of the grain storage tank 301, so that the grain taking box 303 can be attached to the arc inner wall of the grain storage tank 301 and move;

[0034] The transmission shaft 503 and the positioning shaft 504 rotate and penetrate the side wall of the oven 1, and the connection can be sealed by a rubber ring. The transmission shaft 503 is connected to the output end of the power source. The power source can be set as a motor. The output shaft of the motor drives the transmission shaft 503 connected thereto to rotate through a coupling, thereby providing kinetic energy for the transmission operation of the equipment.

[0035] The width of the chain belt 506 is greater than the groove depth of the driven wheel 502, and the outer edge of the chain belt 506 is at least large enough for the rotating shaft 605 to pass through, and the rotating shaft 605 does not touch the outer edge of the driven wheel 502 during the movement of the chain belt 506, so as to avoid the driven wheel 502 interfering with the movement trajectory of the rotating shaft 605, thereby ensuring the normal movement of the grain transfer component 6;

[0036] The grain transfer component 6 also includes an inclined plate 607 obliquely installed in the middle of the inner cavity of the grain transfer hopper 601. The lower half of the grain guide plate 602 and the entire surface of the inclined plate 607 are provided with sieve holes for grain particles to pass through, so as to extend the material dropping time and the separation surface between the grain and the husk, and facilitate the use of airflow to remove impurities from the grain. The side wall of the grain transfer hopper 601 located between the grain guide plate 602 and the inclined plate 607 is provided with a grain outlet, wherein the side of the inclined plate 607 away from the grain outlet is fixedly connected to the inner wall of the grain transfer hopper 601, and a gap for grain discharge is left between the side close to the grain outlet and the inner wall of the grain transfer hopper 601. When the push rod 403 pushes the balance block 606 to tilt, the grain transfer hopper 601 can tilt toward one side of the bulk grain tray 401 with the rotating shaft 605 as the axis, so that the divided grain in the grain transfer hopper 601 is discharged into the bulk grain tray 401;

[0037] The circulating air blowing assembly 7 includes a circulating fan 701, an air inlet pipe 702, an exhaust pipe 703 and a jet pipe 704, wherein the circulating fan 701 is installed on the outer wall of the oven 1, the air inlet and exhaust ends of the circulating fan 701 are respectively connected to the air inlet pipe 702 and the exhaust pipe 703, the exhaust pipe 703 is fixedly connected to the jet pipe 704, the jet pipe 704 is directly opposite to the ventilation groove on the side wall of the grain transfer hopper 601, and the ventilation groove is located above the grain guide plate 602 and the inclined plate 607 to facilitate the operation of the circulating fan 701 to form a circulating hot air flow, which is beneficial to blowing away the husks mixed in the grain during the grain transfer process of the grain box 303, and the bottom of the oven 1 is equipped with 10 for receiving the husks.

[0038] Working principle of the present invention:

[0039] Start the equipment, the output shaft of the motor drives the transmission shaft 503 connected thereto to rotate through the coupling, providing kinetic energy for the transmission operation of the equipment, and the transmission shaft 503 carries the roller frame 302 and the grain taking boxes 303 circumferentially distributed on the periphery of the roller frame 302 to rotate coaxially, so that the grain taking boxes 303 passing through the grain storage tank 301 can take the stored grain in the inner cavity of the grain storage tank 301, so as to transfer the taken grain outward;

[0040] At the same time, the driving wheel 501 mounted on the transmission shaft 503 can drive the driving wheel 501 and the driven wheel 502 mounted on the positioning shaft 504 to rotate coaxially through the transmission belt 505, and the two driven wheels 502 on the same side are connected by a chain belt 506, so that the front and rear two chain belts 506 carry the grain transfer assembly 6 step by step under the transmission of the driven wheel 502, wherein the balance block 606 gives a vertical downward force to the grain transfer bucket 601, and by virtue of the rotating shaft 605 connected to the outer edge of the chain belt 506, the grain transfer assembly 6 always maintains a vertical moving state until a grain box 303 filled with grain flips downward from the highest point, and then a group of grain transfer assemblies 6 just When the grain guide plate 602 touches the side wall of the grain storage tank 301, the limit rod 603 sliding along the inclined groove can compress the spring 604 to the lower right, so that the grain guide plate 602 is condensed toward the inner cavity of the grain transfer hopper 601 to ensure the unimpeded movement of the grain transfer component 6. After the grain guide plate 602 passes the side wall of the grain storage tank 301, it will extend to the upper left to the bottom of the grain box 303 under the elastic force of the spring 604. Then the grain guide plate 602 and the grain box 303 contact and retract again. During this period, the grain in the grain box 303 will be dumped by the grain guide plate 602 into the inner cavity of the grain transfer hopper 601, thereby realizing the quantitative transfer of the grain in the grain storage tank 301.

[0041] When the grain transfer assembly 6 that has completed the grain transfer continues to move upward and reaches the upper right side of the bulk grain tray 401, the transmission shaft 503 can carry the guide block 406 connected to the outer ring of the rotating handle 405 to rotate to the rightmost end. Since the guide block 406 always moves along the slide rail of the swing rod 404, the swing rod 404 is pulled by the rotating handle 405 and the guide block 406, and deflects to the right to the maximum angle with the base shaft 408 as the axis, until the push rod 403 touches and pushes the balance block 606 to tilt outward, so that the grain transfer hopper 601 can tilt toward the side of the bulk grain tray 401 with the rotating shaft 605 as the axis, causing the grain in the grain transfer hopper 601 to be discharged from the grain outlet The grain is then fed into the bulk grain tray 401. As the handle 405 and the guide block 406 continue to rotate, the swing rod 404 will swing back to the left, so that the scraper plate 402 connected to the top of the swing rod 404 can sweep from right to left along the sliding of the bulk grain tray 401. The scraper plate 402 that sweeps horizontally will level the grain injected into the bulk grain tray 401. During this period, the grain particles will pass through the sieve holes on the bottom wall of the bulk grain tray 401 and fall into the grain storage tank 301. When the grain is returned, the grain particles are dispersed, so that the grain particles are fully in contact with the hot air in the oven 1, further increasing its heat exchange area and improving the grain drying efficiency. The grain transfer component 6 that has completed the unloading of the grain enters the next grain transportation cycle.

[0042] The equipment cyclically implements the above operation to achieve the lifting, turning and dispersing of the grain in the oven 1, that is, a multi-stage drying mechanism, so as to improve the efficiency of grain drying and energy utilization.

[0043] 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 technician familiar with the technical field can make equivalent substitutions or modifications within the technical scope disclosed by the present invention; according to the technical plan and its improved conception of the present invention, all of which should be included under the protection of the present invention.

Claims

1. A circulating lifting device for a grain dryer, comprising a drying oven (1) and a support frame (2) fixedly mounted below the drying oven (1), wherein a controller (9) is mounted on the support frame (2), and characterized in that: The left side of the inner cavity of the oven (1) is equipped with a grain bulking assembly (4) and a grain taking assembly (3) which are arranged in an upper and lower manner, and the right side of the inner cavity of the oven (1) is equipped with a transmission assembly (5) and a grain transfer assembly (6), the transmission assembly (5) is used to drive the grain taking assembly (3), the grain bulking assembly (4) and the grain transfer assembly (6) to respectively perform grain distributing operations, grain bulking operations and grain transport operations, and the outer wall of the oven (1) is equipped with a circulating air blowing assembly (7); The grain taking component (3) comprises a grain storage tank (301), a roller frame (302) and a grain taking box (303), wherein the grain storage tank (301) is fixedly mounted at the lower left corner of the inner cavity of the oven (1), and the inner cavity of the grain storage tank (301) is rotatably provided with a roller frame (302), and the outer periphery of the roller frame (302) is fixedly connected with grain taking boxes (303) distributed in a circumference; The transmission assembly (5) comprises a driving wheel (501), a driven wheel (502), a transmission shaft (503), a positioning shaft (504), a transmission belt (505) and a chain belt (506), wherein the left and right sets of driving wheels (501) are coaxially connected to the roller frame (302) and the driven wheel (502) via the transmission shaft (503) and the positioning shaft (504), respectively; the left and right driving wheels (501) on the same side are connected via the transmission belt (505), and the upper and lower driven wheels (502) on the same side are connected via the chain belt (506); The grain transfer assembly (6) comprises a grain transfer hopper (601), a grain guide plate (602), a limit rod (603), a spring (604), a rotating shaft (605) and a balancing block (606), wherein the upper layer of the grain transfer hopper (601) is slidably connected to an inclined grain guide plate (602), both sides of the bottom end of the grain guide plate (602) are fixedly connected to the limit rod (603), the limit rod (603) is connected to the inclined groove of the side wall of the grain transfer hopper (601) by means of a spring (604), the grain transfer hopper (601) is rotatably connected between the front and rear two chain belts (506) by means of a rotating shaft (605), and a balancing block (606) is fixedly mounted on the bottom of the grain transfer hopper (601); The bulk grain assembly (4) comprises a bulk grain tray (401), a grain scraper plate (402), a push rod (403), a swing rod (404), a rotating handle (405), a guide block (406), a vertical plate (407) and a base shaft (408), wherein the bulk grain tray (401) is fixedly mounted in the upper inner cavity of the oven (1), and a grain scraper plate (402) is slidably disposed in the bulk grain tray (401), and the outside of the grain scraper plate (402) is fixedly connected to a bulk grain tray located on the bulk grain tray. The push rod (403) is below the plate (401), the end of the grain scraper plate (402) is rotatably connected to the top of the swing rod (404), the bottom of the swing rod (404) is rotatably connected to the vertical plate (407) with the base shaft (408) as the axis, the rotating handle (405) is coaxially arranged with the transmission shaft (503), the outer ring of the rotating handle (405) is rotatably connected to the guide block (406), and the guide block (406) is slidably arranged in the slide rail of the swing rod (404).

2. A circulating lifting device for a grain dryer according to claim 1, characterized in that: The grain storage trough (301) has a longitudinal section of a 1 / 2 arc. The grain storage trough (301), the roller frame (302) and the grain taking box (303) are coaxially arranged. The outer edge of the grain taking box (303) fits with the inner wall of the grain storage trough (301), so that the grain taking box (303) can move by adhering to the arc inner wall of the grain storage trough (301).

3. A circulating lifting device for a grain dryer according to claim 1, characterized in that: The transmission shaft (503) and the positioning shaft (504) rotate and penetrate the side wall of the oven (1), and the connection is sealed by a rubber ring. The transmission shaft (503) is connected to the output end of the power source.

4. A circulating lifting device for a grain dryer according to claim 1, characterized in that: The width of the chain belt (506) is greater than the groove depth of the driven wheel (502), and the outer edge of the chain belt (506) is at least large enough for the rotating shaft (605) to pass through, and the rotating shaft (605) does not touch the outer edge of the driven wheel (502) when traveling along with the chain belt (506).

5. The circulating lifting device for a grain dryer according to claim 1, characterized in that: The grain transfer assembly (6) further comprises an inclined plate (607) obliquely mounted in the middle of the inner cavity of the grain transfer hopper (601); the lower half of the grain guide plate (602) and the entire surface of the inclined plate (607) are provided with sieve holes for grain particles to pass through; a grain outlet is provided on the side wall of the grain transfer hopper (601) between the grain guide plate (602) and the inclined plate (607); a side of the inclined plate (607) away from the grain outlet is fixedly connected to the inner wall of the grain transfer hopper (601); and a gap for grain discharge is left between the side of the inclined plate (607) close to the grain outlet and the inner wall of the grain transfer hopper (601).

6. A circulating lifting device for a grain dryer according to claim 5, characterized in that: The circulating air blowing assembly (7) comprises a circulating fan (701), an air inlet pipe (702), an exhaust pipe (703) and a jet pipe (704), wherein the circulating fan (701) is installed on the outer wall of the oven (1), the air inlet and exhaust ends of the circulating fan (701) are respectively connected to the air inlet pipe (702) and the exhaust pipe (703), the exhaust pipe (703) is fixedly connected to the jet pipe (704), the jet pipe (704) is directly opposite to the ventilation slot on the side wall of the grain hopper (601), the ventilation slot is located above the grain guide plate (602) and the inclined plate (607), and the bottom of the oven (1) is installed with a (10) for receiving husks.

7. The circulating lifting device for a grain dryer according to claim 1, characterized in that: The top wall of the oven (1) is connected to a grain injection pipe located directly above the bulk grain tray (401), the bottom wall of the oven (1) is connected to a grain discharge pipe, and a cut-off assembly (8) is provided between the grain discharge pipe and the grain storage tank (301), the cut-off assembly (8) comprising a cut-off plate (801) and a cylinder (802), wherein the cut-off plate (801) is slidably provided in a channel at the bottom of the grain storage tank (301), and the telescopic end of the cylinder (802) is fixedly connected to the cut-off plate (801).

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