Grain drying equipment

Abstract

The utility model discloses grain drying equipment, which belongs to the technical field of drying and comprises a grain drying tank used for storing dried grains, the periphery of the grain drying tank is connected with a hot-air blower in a penetrating manner, and longitudinal turning components are oppositely and symmetrically lifted in a crossed manner to turn the grains. The longitudinal overturning assembly comprises two threaded vertical rods which are arranged on the two sides of the supporting column and rotationally connected to the inner bottom wall of the heat conduction inner container, grain stirring lifting plates are arranged on the peripheral sides of the two threaded vertical rods, a transmission mechanism is arranged in the transmission mounting box, and a bottom end output shaft of the servo motor is connected with the transmission mechanism through a transmission shaft; and a circumferential turning assembly is arranged on the circumferential side of the transmission shaft above the transmission mounting box, and is directly driven by a servo motor to rotate in the inner cavity of the heat conduction inner container in the circumferential direction to turn grains. According to the grain drying device, a double-turning mode is adopted, so that grains can be in full and uniform hot air contact in the drying process, and the drying uniformity is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drying, in particular to a grain drying device. Background Art

[0002] Grain drying is a crucial post-processing step in agriculture, designed to remove excess moisture from grain to prevent mold, pests, and spoilage, thereby ensuring long-term storage and transportation. The drying process typically involves the use of specially designed drying equipment, such as grain drying tanks.

[0003] The existing grain drying equipment has the following problems or shortcomings in practical applications: traditional grain drying equipment often relies on a single stirring structure (such as stirring blades or stirring shafts), which does not fully turn the grain, and the hot air cannot fully contact the grain, and a large amount of hot air is not effectively utilized. In addition, the grain is unevenly heated during the drying process, which easily forms drying dead corners, causing the grain to be locally over-dry or over-wet during the drying process, affecting the drying effect.

[0004] After searching, the existing Chinese patent publication number is: CN110500856B, which is a device that can discharge grains autonomously after drying based on gravity changes. The outer barrel is movably connected to a drying chamber inside the outer barrel, isolating the drying chamber from the outer barrel and allowing them to move independently. A heating pipe is fixedly connected to the inside of the drying chamber, which can heat the grains in the drying chamber and increase the drying speed. The drying chamber is movably connected to a rotating shaft inside the drying chamber, and a stirring blade is movably connected to the outside of the rotating shaft, so that the stirring blade can stir the grains.

[0005] The cited patent documents also have the same problem. The drying equipment relies on a single stirring structure (such as stirring blades or stirring shafts), which does not sufficiently turn the grains, and the hot air cannot fully contact the grains. In addition, the grains are heated unevenly during the drying process, which easily forms drying dead corners, causing the grains to be locally over-dry or over-wet during the drying process, affecting the drying effect. Utility Model Content

[0006] The purpose of the utility model is to provide a grain drying device to solve the problems raised in the background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grain drying device, comprising a grain drying tank for storing dried grains and a detachable top cover installed on the top surface of the grain drying tank, the top surface of the detachable top cover is installed with a servo motor, a hot air blower is connected to the periphery of the grain drying tank, a heat-conducting liner is provided inside the grain drying tank, the hot air blower delivers hot air into the heat-conducting liner, a support column is fixed at the center position of the inner bottom wall of the heat-conducting liner, a transmission mounting box is fixed at the top of the support column, a longitudinal flipping assembly is provided below the transmission mounting box, the longitudinal flipping assembly is symmetrically lifted and lowered in a back-to-back manner to flip the grains, and the longitudinal flipping assembly includes a support column arranged on both sides of the support column and rotatably connected to the heat-conducting liner Two threaded vertical rods on the inner bottom wall, the top polished rods of the threaded vertical rods are rotated and extended into the transmission installation box, the circumferential sides of the two threaded vertical rods are provided with grain stirring and lifting plates, the two grain stirring and lifting plates are arranged back to back, and a transmission mechanism is provided in the transmission installation box, the bottom end output shaft of the servo motor is connected to the transmission mechanism through the transmission shaft, and the transmission mechanism drives one of the threaded vertical rods to perform forward rotation and the other threaded vertical rod to perform reverse rotation, so that the two threaded vertical rods respectively drive the two grain stirring and lifting plates to cross-lift and turn the grain, and a circumferential turning assembly is provided on the circumferential side of the transmission shaft above the transmission installation box, and the circumferential turning assembly is directly driven by the servo motor to rotate circumferentially in the inner cavity of the heat-conducting liner to turn the grain.

[0008] Preferably, the circumferential sides of the two threaded vertical rods are threadedly connected with lifting sleeves, the two grain stirring lifting plates are respectively installed on the outer walls of adjacent lifting sleeves, and each lifting sleeve is connected to the support column through a lifting limit member.

[0009] Preferably, the lifting limit member includes a limit stroke groove symmetrically and longitudinally opened on the outer wall of the supporting column and a limit stroke slider symmetrically welded to the opposite sides of the two lifting sleeves.

[0010] Preferably, in this solution, when the threaded vertical rod rotates, the limit stroke slider slides longitudinally within the limit stroke groove, so that the lifting sleeve is lifted and lowered longitudinally around the threaded vertical rod.

[0011] Preferably, in this solution, each of the lifting sleeves is provided with a corrugated rubber sealing tube at both ends and around the threaded vertical rod. One end of the corrugated rubber sealing tube is fixedly connected to the lifting sleeve, and the other ends of the two adjacent upper and lower corrugated rubber sealing tubes are respectively fixedly connected to the bottom wall of the heat-conducting liner and the bottom surface of the transmission mounting box.

[0012] Preferably, the circumferential flip assembly includes a connecting support rod fixed to the circumferential side of the transmission shaft, an upper ring member welded to both ends of the connecting support rod, and two fixed vertical plates symmetrically welded to the bottom surface of the upper ring member.

[0013] In this embodiment, the inner walls of both fixed vertical plates are preferably welded with a plurality of circumferential flaps at equal intervals in the longitudinal direction. A lower ring is welded to the bottom ends of both fixed vertical plates. The lower ring is concentrically arranged with the upper ring and covers the outer side of the grain stirring and lifting plate. When the output shaft of the servo motor directly drives the drive shaft to rotate, the drive shaft drives the connecting support rod, the upper ring, the fixed vertical plates, the circumferential flaps, and the lower ring to rotate simultaneously in the same direction, thereby causing the circumferential flaps to flip the grain located circumferentially within the heat-conducting inner container.

[0014] Preferably, in this solution, a box cover is mounted on the top surface of the transmission installation box by means of bolts, and the transmission shaft rotates through the box cover longitudinally via a sealed bearing and extends into the transmission installation box.

[0015] Preferably, the transmission mechanism includes a driving gear interference-fitted on the bottom end of the transmission shaft, a driven gear meshing with the driving gear, a driving sprocket located above the driving gear and interference-fitted on the circumference of the transmission shaft, and a driven sprocket connected to the driving sprocket through a chain.

[0016] Preferably, the driven gear is fixedly connected to the top polished rod of one of the threaded vertical rods, the driven sprocket is fixedly connected to the top polished rod of the other threaded vertical rod, and both of the threaded vertical rods are rotatably connected to the bottom of the transmission mounting box through sealed bearings.

[0017] Compared with the prior art, the technical effects and advantages of this utility model are:

[0018] This grain drying equipment uses a servo motor to drive both the longitudinal and circumferential turning assemblies, enabling the grain to be turned not only longitudinally by the stirring and lifting plates but also circumferentially by the circumferential turning plates. This dual-action mechanism ensures that the grain receives sufficient and even exposure to hot air during drying, significantly improving drying uniformity. The two threaded rods in the longitudinal turning assembly rotate in opposite directions via a transmission mechanism, driving the lifting sleeve up and down. This causes the grain stirring and lifting plates to rise and fall in a crosswise manner, further enhancing grain dispersion and preventing over-drying or over-wetting.

[0019] The hot air generated by the hot air blower is transported to the inside of the grain drying tank through the heat-conducting inner tank. Since the grains constantly change their position during the turning process, the hot air can contact the grains more evenly, improving the utilization efficiency of the hot air and reducing energy waste. The design of the heat-conducting inner tank allows the hot air to act more concentratedly on the grains, reducing heat loss and further improving the drying efficiency.

[0020] The design of the corrugated rubber sealing tube effectively prevents grain from entering the threaded path of the threaded uprights, avoids equipment failure and extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 This is a schematic structural diagram of the longitudinal flip assembly of the present invention in a disassembled state;

[0024] Figure 3 This is a schematic structural diagram of the threaded upright of the utility model in an installed state;

[0025] Figure 4 For this utility model Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 5 This is a schematic structural diagram of the upper ring member of the utility model in an installed state;

[0027] Figure 6 This is a schematic structural diagram of the transmission mechanism of the present invention in a disassembled state;

[0028] Figure 7 It is a structural schematic diagram of the transmission mechanism of the present utility model.

[0029] Description of reference numerals:

[0030] In the figure: 1. Grain drying tank; 2. Removable top cover; 3. Servo motor; 4. Feed pipe cover; 5. Ladder; 6. Hot air blower; 7. Heat-conducting liner; 8. Lower ring; 9. Grain stirring lifting plate; 10. Circumferential flip assembly; 11. Longitudinal flip assembly; 12. Pressure gauge; 13. Fixed vertical plate; 14. Circumferential flip plate; 15. Corrugated rubber sealing tube; 16. Support column; 17. Threaded vertical rod; 18. Limit stroke groove; 19. Lifting sleeve; 20. Limit stroke slider; 21. Connecting support rod; 22. Transmission mounting box; 23. Transmission shaft; 24. Box cover; 25. Driving gear; 26. Driven gear; 27. Transmission mechanism; 28. Driving sprocket; 29. ​​Driven sprocket; 30. Sealed bearing; 31. Chain; 32. Upper ring. DETAILED DESCRIPTION

[0031] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0032] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside shown in the figures of the present invention, and are explained here together.

[0033] This embodiment provides Figures 1 to 7 The grain drying equipment shown includes a grain drying tank 1 for storing dried grain and a removable top cover 2 mounted on the top surface of the grain drying tank 1. The grain drying tank 1 serves as the primary container for storing and drying grain, providing a sealed space in which the grain can be treated with hot air, ensuring that the grain is not affected by the external environment during the drying process, thereby improving drying efficiency and quality. A servo motor 3 is mounted on the top surface of the removable top cover 2. The servo motor 3 serves as a power source, driving a turning device, providing a precisely controllable power output to control the movement of the turning device, ensuring uniform turning of the grain and improving drying uniformity. A hot air blower 6 is connected to the side of the grain drying tank 1. The hot air blower 6 generates and delivers hot air, which is then sent into the interior of the grain drying tank to heat the grain, accelerate the evaporation of moisture in the grain, and increase the drying speed. Multiple support legs are welded to the bottom of the grain drying tank 1. A discharge pipe with a valve is installed on the bottom surface of the grain drying tank 1. A feed pipe is installed on one side of the top surface of the removable top cover 2, and a feed pipe cap 4 is installed on the top of the feed pipe. A pressure gauge 12 is also installed on the top surface of the removable top cover 2. A ladder 5 is installed on the outer wall of the grain drying tank 1, near the feed pipe. Pressure gauge 12 monitors the pressure inside the tank and displays the pressure inside the tank to ensure safe operation and promptly detect abnormalities.

[0034] In this embodiment, the grain drying tank 1 is provided with a heat-conducting inner liner 7, which serves as a heat exchange structure to transfer hot air to the grain, thereby enhancing the contact efficiency between the hot air and the grain, improving the heat utilization rate, improving the drying efficiency, and reducing energy consumption. The hot air blower 6 delivers hot air toward the heat-conducting inner liner 7. A support column 16 is fixed to the center of the inner bottom wall of the heat-conducting inner liner 7. A transmission mounting box 22 is fixed to the top of the support column 16. A longitudinal flipping assembly 11 is provided below the transmission mounting box 22. The longitudinal flipping assembly 11 lifts and flips the grains in a symmetrical and back-to-back manner. The longitudinal flipping assembly 11 includes two threaded rods 17 provided on both sides of the support column 16 and rotatably connected to the inner bottom wall of the heat-conducting inner liner 7. The bottom ends of the two threaded rods 17 are connected to the inner bottom wall of the heat-conducting inner liner 7 through bearings for rotation of the threaded rods 17. The top polished rods of the threaded vertical rods 17 rotate and extend through the transmission mounting box 22. A grain stirring and lifting plate 9 is provided on the circumference of each of the two threaded vertical rods 17. The threaded vertical rods 17 drive the grain stirring and lifting plate 9 to rise and fall. By rotating, the lifting sleeve 19 moves up and down, achieving vertical movement of the grain stirring and lifting plate 9, turning the grain. The grain stirring and lifting plate 9 turns the grain longitudinally, and the lifting action turns the grain layer, preventing grain clumping and improving drying uniformity. The two grain stirring lifting plates 9 are arranged in back-to-back relationship. A transmission mechanism 27 is provided in the transmission mounting box 22. The bottom output shaft of the servo motor 3 is connected to the transmission mechanism 27 through the transmission shaft 23. The transmission mechanism 27 drives one of the threaded vertical rods 17 to rotate in the forward direction and the other threaded vertical rod 17 to rotate in the reverse direction, so that the two threaded vertical rods 17 respectively drive the two grain stirring lifting plates 9 to lift and turn the grains in a crosswise manner. A circumferential turning assembly 10 is provided on the circumferential side of the transmission shaft 23 above the transmission mounting box 22. The circumferential turning assembly 10 rotates around the inner cavity of the heat-conducting liner 7 under the drive of the servo motor 3, further promoting uniform heating of the grains and avoiding local overheating. The longitudinal turning assembly 11 turns the grains in a crosswise manner. The servo motor 3 drives the transmission mechanism 27, causing the two threaded vertical rods 17 to rotate in the reverse direction, realizing longitudinal cross-turning of the grains and increasing the contact area between the grains and the hot air. The circumferential turning assembly 10 is directly driven by the servo motor 3 to rotate circumferentially in the inner cavity of the heat-conducting liner 7 to turn the grains. When the servo motor 3 drives the circumferential turning component 10 and the longitudinal turning component 11 through the transmission mechanism 27 to turn the grains circumferentially and longitudinally cross-turn the grains respectively, it can help increase the contact area between the hot air input by the hot air blower 6 and the grains, thereby improving the drying uniformity of the grains and preventing the problem of half-cooked grains from being dried.

[0035] In this embodiment, the stroke-limiting groove 18 limits the stroke of the lifting sleeve 19. The stroke-limiting slider 20 slides in the groove to limit the lifting range, prevent the lifting sleeve 19 from excessive movement, and ensure the reliability of the flipping action. At the same time, the longitudinal running trajectory of the lifting sleeve 19 can be guaranteed. The circumferential sides of the two threaded vertical rods 17 are threadedly connected with the lifting sleeve 19. The two grain stirring lifting plates 9 are respectively installed on the outer walls of the adjacent lifting sleeves 19. Each lifting sleeve 19 is connected to the support column 16 through a lifting limiter. The lifting limiter includes a stroke-limiting groove 18 symmetrically longitudinally opened on the outer wall of the circumference of the support column 16 and a stroke-limiting slider 20 symmetrically welded to the opposite sides of the two lifting sleeves 19. When the threaded vertical rod 17 rotates, the stroke-limiting slider 20 slides longitudinally in the stroke-limiting groove 18, so that the lifting sleeve 19 is lifted and lowered longitudinally on the circumferential side of the threaded vertical rod 17.

[0036] In this embodiment, each lifting sleeve 19 is provided with a corrugated rubber sealing tube 15 at both ends, located around the threaded rod 17. One end of the corrugated rubber sealing tube 15 is fixedly connected to the lifting sleeve 19, while the other ends of two adjacent corrugated rubber sealing tubes 15 are respectively fixedly connected to the inner bottom wall of the heat-conducting liner 7 and the bottom surface of the transmission mounting box 22. This ensures that when the threaded rod 17 drives the lifting sleeve 19 to move up and down, the lifting sleeve 19 can not only maintain its position, but also provide a seal and protection for the threaded rod 17, preventing grain from getting stuck in the threads of the threaded rod 17 and affecting the movement of the lifting sleeve 19. The corrugated rubber sealing tube 15 seals the gap between the threaded rod 17 and the lifting sleeve 19, preventing grain from entering the threads of the threaded rod 17, keeping the equipment clean, and preventing grain from getting stuck and affecting the lifting of the lifting sleeve 19.

[0037] In this embodiment, the circumferential flip assembly 10 includes a connecting support rod 21 fixed to the circumference of the transmission shaft 23, an upper ring 32 welded to both ends of the connecting support rod 21, and two fixed vertical plates 13 symmetrically welded to the bottom surface of the upper ring 32. The upper ring 32 and the fixed vertical plates 13 cooperate to form the circumferential flip assembly 10, supporting the circumferential flip plate 14, enhancing the stability of the flip assembly and improving the flipping effect.

[0038] In this embodiment, a plurality of circumferential flip plates 14 are welded longitudinally and equidistantly to the inner walls of both fixed vertical plates 13. A lower ring 8 is welded to the bottom ends of both fixed vertical plates 13. The lower ring 8 is concentrically arranged with the upper ring 32 and covers the outer side of the grain stirring and lifting plate 9. When the output shaft of the servo motor 3 directly drives the drive shaft 23 to rotate, the drive shaft 23 drives the connecting support rod 21, the upper ring 32, the fixed vertical plates 13, the circumferential flip plates 14, and the lower ring 8 to rotate simultaneously and in the same direction, thereby causing the circumferential flip plates 14 to flip the grain located circumferentially within the heat-conducting liner 7. The spacing between the circumferential flip plates 14 at the same height on the inner walls of the two fixed vertical plates 13 is greater than the combined length of the two grain stirring and lifting plates 9. Therefore, when the fixed vertical plates 13 drive the circumferential flip plates 14 to rotate circumferentially, it does not interfere with the lifting and lowering of the grain stirring and lifting plate 9, and the operating trajectories of the grain stirring and lifting plate 9 and the circumferential flip plates 14 do not affect each other. Fixed vertical plate 13 secures circumferential turning plate 14, supporting and securing it so that it rotates with circumferential turning assembly 10, enhancing structural stability and ensuring effective turning. Circumferential turning plate 14 assists in the circumferential turning of the grain, cooperating with fixed vertical plate 13 to turn the grain, expanding the turning range and improving drying efficiency.

[0039] In this embodiment, a cover 24 is bolted to the top surface of the transmission mounting box 22. The transmission shaft 23 rotates longitudinally through the cover 24 via a sealed bearing 30 and extends into the transmission mounting box 22. The transmission mounting box 22 accommodates the transmission mechanism 27, providing sealing protection and support for the transmission mechanism 27, protecting the transmission mechanism 27 from external factors and extending its service life.

[0040] In this embodiment, the transmission mechanism 27 includes a driving gear 25 that is interference fit on the bottom end of the transmission shaft 23, a driven gear 26 that is meshed with the driving gear 25, a driving sprocket 28 that is located above the driving gear 25 and is interference fit on the circumference of the transmission shaft 23, and a driven sprocket 29 that is connected to the driving sprocket 28 through a chain 31.

[0041] In this embodiment, the driven gear 26 is fixedly connected to the top polished rod of one of the threaded vertical rods 17, and the driven sprocket 29 is fixedly connected to the top polished rod of the other threaded vertical rod 17. Both threaded vertical rods 17 are rotatably connected to the bottom of the transmission mounting box 22 through sealed bearings 30. When the servo motor 3 drives the transmission shaft 23 to rotate in the forward clockwise direction, the transmission shaft 23 drives the driving gear 25 and the driving sprocket 28 to rotate in the forward clockwise direction, and the driving gear 25 engages to drive the driven gear 26 to rotate in the reverse counterclockwise direction, and the driving sprocket 28 drives the driven sprocket 29 to rotate in the forward clockwise direction through the chain 31, so that the driven gear 26 drives the connected threaded rod 17 to rotate in the reverse counterclockwise direction, so that the lifting sleeve 19 on the side of the threaded rod 17 is lowered, and the driven sprocket 29 drives the connected threaded rod 17 to rotate in the forward clockwise direction, so that the lifting sleeve 19 on the side of the threaded rod 17 is raised, so that the two grain stirring lifting plates 9 are lifted and turned over in a crosswise manner; when the servo motor 3 drives the transmission shaft 23 to rotate in the reverse counterclockwise direction, then the driven gear 26 drives the connected threaded rod 17 to rotate in the forward clockwise direction, and the driven sprocket 29 drives the connected threaded rod 17 to rotate in the reverse counterclockwise direction, and at the same time, it can also drive the two grain stirring lifting plates 9 to lift and turn over the grain in a crosswise manner. No matter the output shaft of the servo motor 3 rotates clockwise or counterclockwise, it can drive the two grain stirring lifting plates 9 to cross-lift and turn the grains. The circumferential turning assembly 10 directly runs in the same direction according to the running direction of the servo motor 3.

[0042] In this embodiment, the heat-conducting inner container 7 is made of stainless steel. Stainless steel not only has good thermal conductivity but is also corrosion-resistant, making it suitable for use in a variety of environments. In the food industry, stainless steel is widely used for its hygiene and durability. Common grades include 304 or 316 stainless steel.

[0043] Working principle:

[0044] The grain drying equipment is to reach the top of the grain drying tank 1 by climbing the ladder 5, open the feed pipe cover 4, add the grain to be dried into the grain drying tank 1 through the feed pipe, then close the feed pipe cover 4, turn on the power, start the servo motor 3, and the servo motor 3 starts to operate. The servo motor 3 transmits power to the transmission mechanism 27 in the transmission installation box 22 through the transmission shaft 23. The servo motor 3 directly drives the transmission shaft 23 through the transmission shaft 23, thereby driving the connecting support rod 21, the upper ring 32, the fixed vertical plate 13 and the circumferential flip plate 14 to rotate together, realizing the circumferential flipping of the grain in the heat-conducting inner tank 7. The driving gear 25 in the transmission mechanism 27 transmits power to one of the threaded vertical rods 17 through the meshing action with the driven gear 26, and drives the driven sprocket 29 through the driving sprocket 28 and the chain 31, thereby driving the other threaded vertical rod 17. The two threaded vertical rods 17 drive their respective lifting sleeves 19 to move up and down by rotating in opposite directions, thereby driving the grain stirring lifting plate 9 to cross-flip the grain.

[0045] The servo motor 3 is capable of forward and reverse rotation. The forward and reverse rotation positions of the servo motor 3 are determined based on the depth of the grain drying tank 1 and the heat-conducting inner liner 7 in the actual application, as well as the actual required longitudinal travel. As the servo motor 3 continues to operate, the transmission mechanism 27 continuously drives the two threaded vertical rods 17 to rotate in opposite directions, causing the lifting sleeve 19 to move up and down, driving the grain stirring lifting plate 9 to cross-turn the grain to prevent grain clumping. Driven by the servo motor 3, the circumferential turning assembly 10 drives the fixed vertical plate 13 and the circumferential turning plate 14 to rotate circumferentially around the inner cavity of the heat-conducting inner liner 7, further turning the grain and uniformly heating it. The hot air generated by the hot air blower 6 is transported into the grain drying tank 1 through the inner wall of the heat-conducting inner liner 7, contacting the turning grain and accelerating the evaporation of the grain moisture. Since the grain is continuously turned by the circumferential turning assembly 10 and the longitudinal turning assembly 11 in the heat-conducting inner liner 7, the hot air can more evenly contact every part of the grain, improving the drying efficiency.

[0046] By using the pressure gauge 12 installed on the detachable top cover 2, the pressure situation in the grain drying tank 1 displayed by the pressure gauge 12 can be checked in real time to ensure that the equipment operates within a safe range. The required pressure relief is carried out through the pressure relief valve on the outer wall of the grain drying tank. According to the grain drying progress and actual needs in actual situations, the speed of the servo motor 3 is adjusted in time to control the flipping frequency to achieve the best drying effect.

[0047] Climb the ladder 5 to reach the top of the grain drying tank 1, open the feed pipe cover 4, and check the degree of grain drying. When the grain reaches the desired degree of drying, turn off the servo motor 3, stop flipping, open the valve on the discharge pipe at the bottom of the grain drying tank 1, and discharge the dried grain. Open the detachable top cover 2 regularly to clean the remaining grain and other debris inside the grain drying tank 1, check the wear of all transmission parts, especially the sealing bearing 30, corrugated rubber sealing tube 15 and other wearing parts, and replace them if necessary to ensure long-term and stable operation of the equipment.

[0048] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "including an element defined by ... does not exclude the presence of other identical elements in the process, method, article or device that includes the element."

[0049] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grain drying device, comprising a grain drying tank (1) for storing dried grains and a detachable top cover (2) mounted on the top surface of the grain drying tank (1), characterized in that: A servo motor (3) is installed on the top surface of the detachable top cover (2), a hot air blower (6) is connected to the periphery of the grain drying tank (1), a heat-conducting liner (7) is provided inside the grain drying tank (1), and the hot air blower (6) delivers hot air toward the heat-conducting liner (7), a support column (16) is fixed at the center position of the inner bottom wall of the heat-conducting liner (7), a transmission mounting box (22) is fixed at the top end of the support column (16), and a longitudinal flip assembly (11) is provided below the transmission mounting box (22); The longitudinal turning assembly (11) is symmetrically lifted and turned over in a back-to-back manner. The longitudinal turning assembly (11) includes two threaded vertical rods (17) arranged on both sides of the support column (16) and rotatably connected to the inner bottom wall of the heat-conducting liner (7), and a grain stirring and lifting plate (9) rotatably connected to the circumference of the two threaded vertical rods (17). The top smooth rods of the threaded vertical rods (17) are rotated to extend through the transmission installation box (22). The transmission installation box (22) is provided with a transmission mechanism (27). The bottom output shaft of the servo motor (3) is connected to the transmission mechanism (27) through the transmission shaft (23). A circumferential turning assembly (10) is provided on the circumferential side of the transmission shaft (23) above the transmission installation box (22). The circumferential turning assembly (10) is directly driven by the servo motor (3) to rotate circumferentially in the inner cavity of the heat-conducting liner (7) to turn over the grain.

2. The grain drying equipment according to claim 1, characterized in that: The circumferential sides of the two threaded vertical rods (17) are both threadedly connected to a lifting sleeve (19), and the two grain stirring lifting plates (9) are respectively installed on the outer walls of adjacent lifting sleeves (19), and each lifting sleeve (19) is connected to the support column (16) through a lifting limit member.

3. The grain drying equipment according to claim 2, characterized in that: The lifting limit member comprises a limit stroke groove (18) symmetrically and longitudinally opened on the outer wall of the peripheral side of the support column (16) and a limit stroke slider (20) symmetrically welded to the opposite sides of the two lifting sleeves (19).

4. The grain drying equipment according to claim 3, characterized in that: When the threaded vertical rod (17) rotates, the limit stroke slider (20) slides longitudinally in the limit stroke groove (18), so that the lifting sleeve (19) lifts and lowers longitudinally around the threaded vertical rod (17).

5. The grain drying equipment according to claim 4, characterized in that: Each of the lifting sleeves (19) is provided with a corrugated rubber sealing tube (15) at both ends thereof and around the threaded vertical rod (17). One end of the corrugated rubber sealing tube (15) is fixedly connected to the lifting sleeve (19), and the other ends of the two adjacent upper and lower corrugated rubber sealing tubes (15) are fixedly connected to the inner bottom wall of the heat-conducting liner (7) and the bottom surface of the transmission mounting box (22), respectively.

6. The grain drying equipment according to claim 5, characterized in that: The circumferential flip assembly (10) comprises a connecting support rod (21) fixed to the circumferential side of the transmission shaft (23), an upper ring member (32) welded to both ends of the connecting support rod (21), and two fixed vertical plates (13) symmetrically welded to the bottom surface of the upper ring member (32).

7. The grain drying equipment according to claim 6, characterized in that: The inner walls of the two fixed vertical plates (13) are both welded with a plurality of circumferential flip plates (14) at equal intervals in the longitudinal direction. The bottom ends of the two fixed vertical plates (13) are welded with a lower ring member (8). The lower ring member (8) is concentrically arranged with the upper ring member (32) and is covered on the outside of the grain stirring and lifting plate (9).

8. The grain drying equipment according to claim 7, characterized in that: A box cover (24) is mounted on the top surface of the transmission installation box (22) via bolts, and the transmission shaft (23) rotates longitudinally through the box cover (24) via a sealed bearing (30) and extends into the transmission installation box (22).

9. The grain drying equipment according to claim 8, characterized in that: The transmission mechanism (27) includes a driving gear (25) interference-fitted with the bottom end of the transmission shaft (23), a driven gear (26) meshingly connected to the driving gear (25), a driving sprocket (28) located above the driving gear (25) and interference-fitted with the circumference of the transmission shaft (23), and a driven sprocket (29) connected to the driving sprocket (28) via a chain (31).

10. The grain drying equipment according to claim 9, characterized in that: The driven gear (26) is fixedly connected to the top polished rod of one of the threaded vertical rods (17), and the driven sprocket (29) is fixedly connected to the top polished rod of the other threaded vertical rod (17). Both of the threaded vertical rods (17) are rotatably connected to the bottom of the transmission mounting box (22) through sealed bearings (30).

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