A type of drum grain dryer

Abstract

This invention relates to the field of grain processing technology, specifically disclosing a drum-type grain dryer, including a fixed frame, a feeding rack, and a drying rack. The feeding rack is rotatably mounted on the left side inside the fixed frame, and the drying rack is fixedly mounted on the right side of the feeding rack. The feeding rack's internal distribution components automatically distribute the grain to be dried according to its particle size, from smallest to largest, feeding grains of different sizes into several drying chambers inside the drying drum. This allows for different airflow speeds for drying grains of different sizes. Furthermore, because the grain particles are relatively uniform in size within their respective drying chambers, the differences in void space between particles are reduced, thereby optimizing the flow path of hot air in the grain, improving heat transfer efficiency, and allowing the hot air to contact the grain more evenly, reducing heat waste, further improving drying efficiency, and reducing energy consumption.

Description

Technical Field

[0001] This invention relates to the field of grain processing technology, specifically to a drum-type grain dryer. Background Technology

[0002] In agriculture, grain drying is a crucial step in ensuring the quality of stored grain. Traditional grain drying methods mostly rely on natural air drying or simple drying equipment. These methods are not only inefficient but also susceptible to weather and environmental factors, leading to decreased grain quality and increased energy consumption. With the development of agricultural mechanization, drum-type grain dryers have gradually become the main equipment for grain drying due to their high efficiency and energy saving. However, existing drum-type grain dryers often suffer from uneven drying, high energy consumption, and inconvenient discharge, which seriously affect drying efficiency and economic benefits.

[0003] Some current rotary grain dryers improve drying efficiency by incorporating adjustable drying racks that allow for angle adjustments based on grain type and moisture content. They also employ zoned drying, using different airflow rates for grains of varying sizes to reduce heat waste and energy consumption. However, these improvements still have some shortcomings in practical operation. For example, the adjustable drying racks are not flexible enough, resulting in limited drying effects; while zoned drying improves efficiency, heat transfer and circulation between drying zones are not ideal, affecting the overall drying effect.

[0004] Therefore, we propose a drum-type grain dryer. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a drum-type grain dryer to solve the aforementioned technical defects.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a drum-type grain dryer, comprising a fixed frame, a feeding frame and a drying frame, wherein the feeding frame is rotatably arranged on the left side inside the fixed frame, and the drying frame is fixedly arranged on the right side of the feeding frame, and an adjusting frame is fixedly arranged on the right side of the bottom of the drying frame, and the front and rear sides of the adjusting frame are respectively movably connected to the right side inside the fixed frame.

[0007] The feeding rack is equipped with a material distribution component, and the drying rack is equipped with a drying cylinder that rotates inside, and the drying cylinder is equipped with a drying component inside.

[0008] The material distribution assembly includes a screening frame, a screening frame is fixedly installed inside the feeding frame, a fixed screen is fixedly installed at the bottom of the screening frame, and an adjustable screen is slidably installed at the bottom of the fixed screen. Adjustable electric cylinders are fixedly installed on both sides of the bottom of the screening frame, and the drive ends of the two adjustable electric cylinders are fixedly connected to the two sides of the adjustable screen respectively.

[0009] The drying assembly includes a material distribution rack, which is fixedly installed inside the drying cylinder and divides the interior of the drying cylinder into several drying chambers. Several material turning racks are also rotatably installed inside the drying cylinder, and these turning racks are located inside the several drying chambers respectively. Several air blowing racks are also fixedly installed inside the material distribution rack, and air guide ports are provided inside the material distribution rack. The interior of each air guide port is connected to the interior of the several air blowing racks, and each of the several air blowing racks is equipped with a flow control valve. The air blowing ports of the several air blowing racks are respectively directed towards the interior of the several drying chambers.

[0010] Furthermore, a servo electric cylinder is fixedly installed on the right side inside the fixed frame, and the drive end of the servo electric cylinder is movably connected to the bottom of the adjustment frame. Adjustment slides are provided on the front and rear sides of the right side inside the fixed frame, and the front and rear sides of the adjustment frame are slidably connected to the interior of the two adjustment slides respectively.

[0011] Furthermore, a scraper is rotatably installed inside the feeding frame and above the screening frame, and the outer circumferential surface of the scraper slides in contact with the upper surface of the fixed screen. A drive motor is fixedly installed on the left side of the feeding frame, and the right end of the output shaft of the drive motor is fixedly connected to the inside of the scraper.

[0012] Furthermore, a guide frame is fixedly installed at the bottom of the screening frame, and a guide trough with the left side higher than the right side is provided inside the guide frame. Several feeding ports are provided on the left side of the drying cylinder, and one side of the feeding port extends into the interior of the feeding frame. The interior of the feeding port is connected to the interior of the guide frame, and an electrically controlled sealing plate is slidably installed on one side of the interior of the feeding port.

[0013] Furthermore, an air inlet is rotatably provided on the right side of the drying cylinder, and the right side of the air inlet extends to the right side of the drying rack. Several one-way exhaust valves are also fixedly provided on the left side of the drying cylinder, and the interiors of the several one-way exhaust valves are respectively connected to the interiors of several drying chambers. A spiral frame is also fixedly provided inside the drying rack, and the surface of the drying cylinder slides in contact with the interior of the spiral frame. An air outlet is also fixedly provided on the right side of the drying rack.

[0014] Furthermore, a drive rod is rotatably arranged on the left side of the guide frame, and a drive gear is fixedly arranged on the surface of the drive rod. Several transmission rods are also rotatably arranged on the left side of the drying cylinder, and driven gears that mesh with the surface of the drive gears are fixedly arranged on the surface of the transmission rods. The left end of the drive rod is fixedly connected to the right side of the scraper, and the right end of the drive rod is movably connected to the inside of the drying cylinder through an electric limit block. The right ends of the several transmission rods are respectively fixedly connected to the left ends of several turning frames.

[0015] Furthermore, several discharge ports are provided on the right side of the drying cylinder, and a discharge pipe is fixedly installed below the right side of the drying rack, with an automatic control valve installed above the inside of the discharge pipe.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows:

[0017] 1. In this invention, the drive end of the servo electric cylinder controls the adjusting frame to move up and down along the inside of the adjusting slide, thereby driving the right side of the drying rack to move up and down inside the fixed frame, while the position of the feeding rack on the left side of the drying rack remains fixed. Therefore, the grain inside the drying rack is tilted left and right, allowing the grain inside the drying rack to flow back and forth, improving the drying effect of the grain. At the same time, after the grain drying process is completed, the height of the right side of the drying rack is controlled to decrease, which facilitates the rapid discharge of the grain inside the drying rack under the action of gravity.

[0018] 2. In this invention, the drying components inside the drying cylinder divide the interior of the drying cylinder into several drying chambers. Combined with the material distribution components inside the feeding rack, the grains to be dried are automatically distributed according to their different particle sizes, from smallest to largest. Grains of different sizes are fed into the several drying chambers inside the drying cylinder, allowing for different airflow speeds for drying based on the grain size. Furthermore, because the grain particles are relatively uniform in size within their respective drying chambers, the differences in gaps between particles are reduced, thereby optimizing the flow path of hot air in the grain, improving heat transfer efficiency, and allowing the hot air to contact the grain more evenly, reducing heat waste, further improving drying efficiency, and reducing energy consumption.

[0019] 3. In this invention, the driving ends of two adjusting electric cylinders control the sliding of the adjusting screen at the bottom of the fixed screen, thereby adjusting the overlap of the screen openings of the fixed screen and the adjusting screen. This achieves an effective sorting effect for grains of different particle sizes. First, the overlap of the screen openings of the fixed screen and the adjusting screen is controlled to be low, and small-sized grains are sorted out. Then, the overlap of the screen openings of the fixed screen and the adjusting screen is gradually increased, allowing grains of different particle sizes to be sorted from small to large. According to the number of drying chambers, the grains to be dried are sorted into the same number of categories, thereby achieving independent drying of grains of different particle sizes. This not only improves the drying efficiency of grains but also reduces heat waste and energy consumption.

[0020] 4. In this invention, the grain is turned over by a turning rack inside the drying chamber, thereby increasing the contact area between the grain and the hot air, which greatly enhances the drying efficiency. In addition, according to the different grain sizes, the airflow of the corresponding air blowing rack inside the drying chamber is controlled. Small-diameter grains are dried with low airflow, while large-diameter grains are dried with high airflow, which reduces heat waste, further improves drying efficiency, and reduces energy consumption. Furthermore, the hot air inside each drying chamber is discharged through the one-way exhaust valve on the left side and flows along the spiral frame set on the surface of the drying cylinder between the inside of the drying rack and the surface of the drying cylinder. This structural design can use circulating hot air to dry and keep the drying cylinder warm, thereby further improving the heat utilization rate and greatly improving the drying efficiency of the grain inside the drying cylinder. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of a drum-type grain dryer according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the air intake and air outlet structures according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the adjusting frame and adjusting slide structure according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the drying cylinder and spiral frame structure according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the drying cylinder according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the internal structure of the feed rack according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the fixed and adjustable screen structure according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the drive gear and driven gear structure according to an embodiment of the present invention.

[0030] In the diagram, 1. Fixed frame; 2. Feeding rack; 3. Drying rack; 4. Adjusting rack; 5. Drive motor; 6. Servo cylinder; 7. Adjusting chute; 8. Screening rack; 9. Fixed screen; 10. Adjusting screen; 11. Adjusting cylinder; 12. Scraper rack; 13. Guide rack; 14. Drying cylinder; 15. Feed port; 16. Electrically controlled enclosure plate; 17. Distributor rack; 18. Drive rod; 19. Transmission rod; 20. Drive gear; 21. Driven gear; 22. Tilting rack; 23. Spiral rack; 24. Air blowing rack; 25. Air duct; 26. Air inlet; 27. One-way exhaust valve; 28. Air outlet; 29. ​​Discharge port; 30. Discharge pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Example 1:

[0034] Please see Figures 1 to 8 As shown, a drum-type grain dryer includes a fixed frame 1, a feeding rack 2, and a drying rack 3. The feeding rack 2 is rotatably arranged on the left side inside the fixed frame 1, and the drying rack 3 is fixedly arranged on the right side of the feeding rack 2. An adjusting rack 4 is fixedly arranged on the right side of the bottom of the drying rack 3, and the front and rear sides of the adjusting rack 4 are movably connected to the right side inside the fixed frame 1, respectively.

[0035] Specifically, a servo cylinder 6 is fixedly installed on the right side inside the fixed frame 1, and the drive end of the servo cylinder 6 is movably connected to the bottom of the adjustment frame 4. Adjustment slides 7 are provided on the front and rear sides of the right side inside the fixed frame 1, and the front and rear sides of the adjustment frame 4 are slidably connected to the interior of the two adjustment slides 7 respectively.

[0036] It should be noted that when adjusting the tilt angle of the drying rack 3, the drive end of the servo electric cylinder 6 controls the adjusting frame 4 to move up and down along the inside of the adjusting slide 7, thereby driving the right side of the drying rack 3 to move up and down inside the fixed frame 1, while the position of the feeding rack 2 on the left side of the drying rack 3 remains fixed. Therefore, by controlling the left and right tilt of the grain inside the drying rack 3, the grain inside the drying rack 3 flows back and forth, improving the drying effect of the grain. At the same time, after the grain drying process is completed, by controlling the height of the right side of the drying rack 3 to decrease, it is convenient to quickly discharge the grain inside the drying rack 3 under the action of gravity.

[0037] Furthermore, the feed rack 2 is equipped with a material distribution component, and the drying rack 3 is equipped with a drying cylinder 14 that rotates inside, and the drying cylinder 14 is equipped with a drying component inside.

[0038] It should be noted that the drying components inside the drying cylinder 14 divide the interior of the drying cylinder 14 into several drying chambers. In conjunction with the material distribution components inside the feeding rack 2, the grains to be dried are automatically distributed according to their different particle sizes from small to large. Grains of different particle sizes are fed into the several drying chambers inside the drying cylinder 14, thereby enabling different air speeds for drying based on the different particle sizes. In addition, because the grain particles are relatively uniform in size within their respective drying chambers, the differences in gaps between particles can be reduced, thereby optimizing the flow path of hot air in the grain, improving heat transfer efficiency, and allowing the hot air to contact the grain more evenly, reducing heat waste, further improving drying efficiency, and reducing energy consumption.

[0039] Specifically, the material sorting assembly includes a screening frame 8, which is fixedly installed inside the feeding frame 2. The top of the feeding frame 2 is rotatably equipped with a cover plate via a rotating shaft. After the grain is fed into the feeding frame 2, the cover plate is used to seal the inside of the feeding frame 2, thereby preventing dust generated during the grain sorting process from escaping. A fixed screen 9 is fixedly installed at the bottom of the screening frame 8, and an adjustable screen 10 is slidably installed at the bottom of the fixed screen 9. Adjustable electric cylinders 11 are fixedly installed on both sides of the bottom of the screening frame 8, and the drive ends of the two adjustable electric cylinders 11 are fixedly connected to the two sides of the adjustable screen 10 respectively.

[0040] It should be noted that during the grain sorting process, the driving ends of two adjusting electric cylinders 11 control the sliding of the adjusting screen 10 at the bottom of the fixed screen 9, thereby adjusting the overlap of the screen openings of the fixed screen 9 and the adjusting screen 10. This achieves an effective sorting effect for grains of different particle sizes. Initially, the overlap of the screen openings of the fixed screen 9 and the adjusting screen 10 is kept low to sort out small-sized grains. Then, the overlap of the screen openings of the fixed screen 9 and the adjusting screen 10 is gradually increased to allow grains of different particle sizes to be sorted from small to large. Based on the number of drying chambers, the grains to be dried are sorted into the same number of categories, thus achieving independent drying of grains of different particle sizes. This not only improves the drying efficiency of the grains but also reduces heat waste and energy consumption.

[0041] Furthermore, a scraper 12 is rotatably arranged inside the feed rack 2 and above the screening rack 8, and the outer peripheral surface of the scraper 12 slides in contact with the upper surface of the fixed screen 9. A drive motor 5 is fixedly arranged on the left side of the feed rack 2, and the right end of the output shaft of the drive motor 5 is fixedly connected to the inside of the scraper 12.

[0042] The output shaft of the drive motor 5 controls the scraper 12 to rotate continuously, which continuously turns the grain inside the feed rack 2, thereby greatly improving the sorting efficiency of the grain and preventing the grain from accumulating inside the screening rack 8.

[0043] Furthermore, a guide frame 13 is fixedly installed at the bottom of the screening frame 8, and the guide frame 13 has a guide trough that is higher on the left and lower on the right. Several feeding ports 15 are provided on the left side of the drying cylinder 14, and one side of the feeding port 15 extends into the interior of the feeding frame 2. The interior of the feeding port 15 is connected to the interior of the guide frame 13, and an electrically controlled sealing plate 16 is slidably installed on one side of the interior of the feeding port 15. By aligning the several feeding ports 15 with the interior of the guide frame 13, it is possible to quickly feed grains of different particle sizes into several drying chambers inside the drying cylinder 14.

[0044] It should be noted that after the grains are sorted by different particle sizes using the fixed screen 9 and the adjustable screen 10, the grains of different particle sizes are fed into the drying cylinder 14 through the feeding port 15 by the guide frame 13. This allows for customized drying conditions for grains of different particle sizes, ensuring the drying efficiency of the grains while reducing heat waste.

[0045] Example 2:

[0046] Specifically, the drying assembly includes a material distribution rack 17, which is fixedly installed inside the drying cylinder 14 and divides the interior of the drying cylinder 14 into several drying chambers. Several material turning racks 22 are also rotatably installed inside the drying cylinder 14 and are located inside the several drying chambers respectively. Several air blowing racks 24 are also fixedly installed inside the material distribution rack 17 and are provided with air guide ports 25. The interior of the air guide ports 25 is connected to the interior of the several air blowing racks 24 respectively, and each of the several air blowing racks 24 is provided with a flow control valve. The air blowing ports of the several air blowing racks 24 are respectively facing the interior of the several drying chambers.

[0047] Furthermore, an air inlet 26 is rotatably provided on the right side of the drying cylinder 14, and the right side of the air inlet 26 extends to the right side of the drying rack 3. Several one-way exhaust valves 27 are also fixedly provided on the left side of the drying cylinder 14, and the interior of the several one-way exhaust valves 27 is respectively connected to the interior of several drying chambers. A spiral frame 23 is also fixedly provided inside the drying rack 3, and the surface of the drying cylinder 14 slides in contact with the interior of the spiral frame 23. An air outlet 28 is also fixedly provided on the right side of the drying rack 3.

[0048] It should be noted that after grains of different particle sizes are fed into different drying chambers, the grains are turned over by the turning rack 22 inside the drying chamber, thereby increasing the contact area between the grains and the hot air, which greatly enhances the drying efficiency. In addition, according to the different particle sizes of the grains, the air flow rate of the air blowing rack 24 inside the corresponding drying chamber is controlled. Small-diameter grains are dried with low air velocity, while large-diameter grains are dried with high air velocity, which reduces heat waste, further improves drying efficiency, and reduces energy consumption. Furthermore, the hot air inside each drying chamber is discharged through the one-way exhaust valve 27 on the left side and flows along the spiral rack 23 on the surface of the drying cylinder 14 between the inside of the drying rack 3 and the surface of the drying cylinder 14. This structural design can use the circulating hot air to dry and keep the drying cylinder 14 warm, thereby further improving the utilization rate of heat and greatly improving the drying efficiency of the grains inside the drying cylinder 14.

[0049] Furthermore, a drive rod 18 is rotatably arranged on the left side of the guide frame 13, and a drive gear 20 is fixedly arranged on the surface of the drive rod 18. Several transmission rods 19 are also rotatably arranged on the left side of the drying cylinder 14, and a driven gear 21 that meshes with the surface of the drive gear 20 is fixedly arranged on the surface of each transmission rod 19. The left end of the drive rod 18 is fixedly connected to the right side of the scraper 12, and the right end of the drive rod 18 is movably connected to the inside of the drying cylinder 14 through an electric limit block. The right ends of the several transmission rods 19 are respectively fixedly connected to the left ends of several turning frames 22.

[0050] Furthermore, several discharge ports 29 are provided on the right side of the drying cylinder 14, and a discharge pipe 30 is fixedly installed on the lower right side of the drying rack 3, with an automatic control valve installed above the inside of the discharge pipe 30.

[0051] It should be noted that during grain drying, after grains of different sizes are fed into several drying chambers, the output shaft of the drive motor 5 drives the drive rod 18 to rotate. At this time, the right end of the drive rod 18 is controlled to rotate in coordination with the inside of the drying cylinder 14. The drive gear 20 on the surface of the drive rod 18 drives several driven gears 21 to rotate synchronously. The transmission rod 19 inside the driven gears 21 drives several turning racks 22 inside the drying cylinder 14 to rotate. The turning racks 22 turn the grain inside the drying chamber, allowing the hot air to contact the grain more evenly, reducing heat waste, further improving drying efficiency, and reducing energy consumption. At the same time, the drive end of the servo cylinder 6 controls the adjusting frame 4 to slide up and down inside the adjusting groove 7, allowing the grain inside the drying cylinder 14 to rotate. The grain in the drying chamber slides left and right under the influence of gravity and the turning frame 22, thereby further improving the drying efficiency and reducing energy consumption. After the grain is dried, when discharging the grain, the drive end of the servo cylinder 6 is controlled to drive the adjusting frame 4 to the bottom of the adjusting groove 7. Then, the automatic control valve inside the discharge pipe 30 is opened, allowing the grain inside the drying chamber to enter the discharge pipe 30 through the discharge port 29 on the right side. Finally, the dried grain is sent out. The electric limit block inside the drying cylinder 14 limits the right end of the drive rod 18. At this time, the drying cylinder 14 rotates synchronously with the rotation of the drive rod 18, thereby sending out the grain in different drying chambers one after another. This not only realizes customized drying treatment for grains of different particle sizes, but also enables rapid particle size classification of the discharged grain.

[0052] Example 3:

[0053] Specifically, this embodiment discloses a drying method for a drum-type grain dryer, including the following steps:

[0054] Step 1: Feed the grain to be dried into the inside of the feeding rack 2. Control the sliding of the adjusting screen 10 at the bottom of the fixed screen 9 by the drive end of the two adjusting electric cylinders 11. Adjust the overlap of the screen holes of the fixed screen 9 and the adjusting screen 10. First, control the overlap of the screen holes of the fixed screen 9 and the adjusting screen 10 to be low, and sort out the small-diameter grains. Then gradually increase the overlap of the screen holes of the fixed screen 9 and the adjusting screen 10, so that the grains of different sizes are sorted from small to large.

[0055] Step 2: Control the scraper 12 to rotate continuously through the output shaft of the drive motor 5, continuously turning the grain inside the feed rack 2, so that grains of different sizes fall into the guide rack 13, and the guide rack 13 feeds grains of different sizes into the drying cylinder 14 through the feed port 15.

[0056] Step 3: After feeding grains of different particle sizes into different drying chambers, the grains are turned over using the turning rack 22 inside the drying chamber. The air flow rate of the air blowing rack 24 inside the corresponding drying chamber is controlled according to the different particle sizes of the grains. Low air speed is used for drying small-particle grains, and high air speed is used for drying large-particle grains. In addition, the hot air inside each drying chamber is discharged through the one-way exhaust valve 27 on the left side and flows along the spiral rack 23 on the surface of the drying cylinder 14 between the inside of the drying rack 3 and the surface of the drying cylinder 14. The circulating hot air is used to dry and keep the drying cylinder 14 warm.

[0057] Step 4: During grain drying, grains of different sizes are fed into several drying chambers. The output shaft of the drive motor 5 drives the drive rod 18 to rotate. The right end of the drive rod 18 is then engaged with the inside of the drying cylinder 14. The drive gear 20 on the surface of the drive rod 18 drives several driven gears 21 to rotate synchronously. The transmission rod 19 inside the driven gears 21 drives several turning racks 22 inside the drying cylinder 14 to rotate. The turning racks 22 turn the grain inside the drying chamber, allowing hot air to contact the grain more evenly, reducing heat waste, further improving drying efficiency, and reducing energy consumption. Simultaneously, the drive end of the servo cylinder 6 controls the adjusting frame 4 to adjust the sliding... The inside of the trough 7 slides up and down, allowing the grain inside the drying cylinder 14 to slide left and right under the influence of gravity and the turning frame 22, thereby further improving the drying efficiency of the grain and reducing energy consumption. After the grain is dried, when discharging the grain, the drive end of the servo cylinder 6 is controlled to drive the adjusting frame 4 to the bottom of the adjusting trough 7. Then, the automatic control valve inside the discharge pipe 30 is opened, allowing the grain inside the drying chamber to enter the discharge pipe 30 through the discharge port 29 on the right side. Finally, the dried grain is sent out. The right end of the drive rod 18 is limited by the electric limit block inside the drying cylinder 14. At this time, the drying cylinder 14 rotates synchronously with the rotation of the drive rod 18, thereby sending out the grain from different drying chambers one after another.

[0058] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0061] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drum-type grain dryer, comprising a fixed frame (1), a feeding rack (2), and a drying rack (3), wherein the feeding rack (2) is rotatably arranged on the left side inside the fixed frame (1), and the drying rack (3) is fixedly arranged on the right side of the feeding rack (2), characterized in that: An adjustment frame (4) is fixedly installed on the right side of the bottom of the drying rack (3), and the front and rear sides of the adjustment frame (4) are movably connected to the right side of the inside of the fixed frame (1); The feeding rack (2) is equipped with a material distribution component, and the drying rack (3) is equipped with a drying cylinder (14) which is rotatably arranged inside, and the drying cylinder (14) is equipped with a drying component inside; The material distribution assembly includes a screening frame (8), the screening frame (8) is fixedly installed inside the feeding frame (2), a fixed screen (9) is fixedly installed at the bottom of the screening frame (8), and an adjustable screen (10) is slidably installed at the bottom of the fixed screen (9). Adjustable electric cylinders (11) are fixedly installed on both sides of the bottom of the screening frame (8), and the driving ends of the two adjustable electric cylinders (11) are fixedly connected to the two sides of the adjustable screen (10) respectively. The drying assembly includes a material distribution rack (17), which is fixedly installed inside the drying cylinder (14). The material distribution rack (17) divides the interior of the drying cylinder (14) into several drying chambers. Several material turning racks (22) are also rotatably installed inside the drying cylinder (14), and the material turning racks (22) are respectively located inside the several drying chambers. Several air blowing racks (24) are also fixedly installed inside the material distribution rack (17), and air guide ports (25) are provided inside the material distribution rack (17). The interior of the air guide ports (25) is respectively connected to the interior of the several air blowing racks (24), and each of the several air blowing racks (24) is provided with a flow channel. The quantity control valve has several air blowing ports (24) facing the interior of several drying chambers respectively; the right side of the drying cylinder (14) is provided with an air inlet (26), and the right side of the air inlet (26) extends to the right side of the drying rack (3); the left side of the drying cylinder (14) is also provided with several one-way exhaust valves (27), and the interior of several one-way exhaust valves (27) is connected to the interior of several drying chambers respectively; the interior of the drying rack (3) is also provided with a spiral rack (23), and the surface of the drying cylinder (14) slides in contact with the interior of the spiral rack (23); the right side of the drying rack (3) is also provided with an air outlet (28).

2. The rotary grain dryer according to claim 1, characterized in that: A servo electric cylinder (6) is fixedly installed on the right side inside the fixed frame (1), and the drive end of the servo electric cylinder (6) is movably connected to the bottom of the adjustment frame (4). Adjustment slides (7) are provided on the front and rear sides of the right side inside the fixed frame (1), and the front and rear sides of the adjustment frame (4) are slidably connected to the interior of the two adjustment slides (7) respectively.

3. A drum-type grain dryer according to claim 1, characterized in that: Inside the feed rack (2) and above the screening rack (8), a scraper rack (12) is rotatably arranged, and the outer circumferential surface of the scraper rack (12) slides in contact with the upper surface of the fixed screen (9). A drive motor (5) is fixedly arranged on the left side of the feed rack (2), and the right end of the output shaft of the drive motor (5) is fixedly connected to the inside of the scraper rack (12).

4. A drum-type grain dryer according to claim 3, characterized in that: The bottom of the screening frame (8) is fixedly provided with a guide frame (13), and the inside of the guide frame (13) is provided with a guide groove that is higher on the left and lower on the right. The left side of the drying cylinder (14) is provided with several feeding ports (15), and one side of the feeding port (15) extends into the inside of the feeding frame (2). The inside of the feeding port (15) is connected to the inside of the guide frame (13), and one side of the inside of the feeding port (15) is slidably provided with an electrically controlled sealing plate (16).

5. A drum-type grain dryer according to claim 4, characterized in that: A drive rod (18) is rotatably arranged on the left side of the guide frame (13), and a drive gear (20) is fixedly arranged on the surface of the drive rod (18). Several transmission rods (19) are also rotatably arranged on the left side of the drying cylinder (14), and a driven gear (21) that meshes with the surface of the drive gear (20) is fixedly arranged on the surface of each of the several transmission rods (19). The left end of the drive rod (18) is fixedly connected to the right side of the scraper (12), and the right end of the drive rod (18) is movably connected to the inside of the drying cylinder (14) through an electric limit block. The right ends of the several transmission rods (19) are respectively fixedly connected to the left ends of several turning frames (22).

6. A drum-type grain dryer according to claim 1, characterized in that: The drying cylinder (14) is provided with several discharge ports (29) on the right side. The drying rack (3) is fixedly provided with a discharge pipe (30) on the lower right side, and an automatic control valve is provided inside the discharge pipe (30) at the top.

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