A fully automatic grain dryer

Abstract

The present application belongs to the technical field of drying machine, and particularly relates to a full-automatic grain drying machine, which comprises supporting legs, a plurality of supporting legs are arranged around the outer ring surface of a drying cylinder, a feeding pipe is arranged on the end cover of the drying cylinder, a discharging groove is arranged on the outer side surface of the lower end of the drying cylinder, a columnar mesh cylinder with an opening facing downward is vertically fixed at the central part of the drying cylinder, an isolation mesh cylinder is arranged on the inner ring surface of the drying cylinder, a drying bin is formed between the isolation mesh cylinder and the columnar mesh cylinder, an air blowing drying assembly is arranged on the drying cylinder, and a stirring and tumbling assembly is arranged in the drying bin. The present application can improve the rapid and uniform drying treatment of grains in the drying bin formed between the columnar mesh cylinder and the isolation mesh cylinder, and can prevent the phenomenon that some grains are damaged due to the serious drying of the grains caused by the excessively high local temperature in the drying bin, thereby affecting the drying quality of the grains in the drying machine.

Description

Technical Field

[0001] This invention belongs to the field of drying machine technology, and in particular relates to a fully automatic grain dryer. Background Technology

[0002] The moisture content of grains directly determines whether they can be stored safely. If the moisture content of grains is too high, they are prone to heating, mold, or even rotting, which will greatly reduce the quality of the grains and seriously affect the economic benefits of growing grains. Therefore, grain drying is of utmost importance.

[0003] When a dryer is needed to dry grains and reduce their internal moisture content for easier storage, most existing dryers transport the grains into a drying chamber and then blow hot air into it. However, because the grains are piled up in the drying chamber and the chamber is relatively deep, the temperature of the hot air entering the chamber gradually decreases. This can lead to grains near the air vents drying more thoroughly, while grains further away from the air vents experience uneven drying, thus affecting the efficiency and quality of the drying process. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0005] This invention relates to a fully automatic grain dryer, comprising support legs, a plurality of support legs surrounding the outer surface of a drying cylinder, a feed pipe provided on the end cap of the drying cylinder, and a discharge trough provided on the lower outer side of the drying cylinder, a columnar mesh cylinder with its opening facing downwards vertically fixed at the center of the drying cylinder, an isolation mesh cylinder provided on the inner surface of the drying cylinder, a drying chamber formed between the isolation mesh cylinder and the columnar mesh cylinder, a blower drying assembly provided on the drying cylinder, and a stirring and tumbling assembly provided inside the drying chamber.

[0006] Furthermore, the blower drying assembly includes a support plate, a sealing ring, an air inlet pipe, a suction ring, and an exhaust pipe. The support plate is installed at the connection between the cylindrical and conical sections of the drying cylinder and is used to support the cylindrical mesh. A sealing ring is fixed at the lower end of the cylindrical mesh. One end of the air inlet pipe passes through the drying cylinder and connects to the upper surface of the sealing ring, while the other end of the air inlet pipe extends out of the drying cylinder and connects to the delivery pipe of the hot air blower. A suction ring with a hollow structure is fixed in the middle of the cylindrical section of the drying cylinder, and multiple suction holes are opened around the circumference of the middle section of the cylindrical section of the drying cylinder. The two ends of the multiple suction holes are respectively connected to the suction ring with a hollow structure and the isolation mesh, which are connected to the isolation cavity formed by the inner wall of the drying cylinder. Multiple exhaust pipes are connected to the outer ring surface of the suction ring, and the outlet of each exhaust pipe is connected to the pump pipe of the pump.

[0007] Furthermore, the blower drying assembly also includes a rotating screw, a connecting shaft, an air guide pipe, and an air-blowing disc. The rotating screw is rotatably inserted into the cylindrical mesh, and the bottom end of the rotating screw extends out of the sealing ring and is connected to the output shaft of the drive motor fixed to the bottom end of the drying cylinder via the connecting shaft. An air guide pipe is slidably inserted into the air inlet pipe. A cavity-structured air-blowing disc is sleeved on the rotating screw via a screw nut, and the air-blowing disc is located inside the cylindrical mesh. The lower end of the air-blowing disc is connected to the air guide pipe, and an air guide hole is opened on the upper surface of the air-blowing disc.

[0008] Furthermore, the stirring and tumbling assembly includes a driving gear, a driven gear, a sun gear, planetary gears, a rotating ring, a rotating column, a gear ring, a stirring rod, and helical blades. The feed pipe is rotatably inserted into the end cover, and a driven gear is sleeved on the feed pipe. The driven gear is located on the upper surface of the end cover. The driven gear meshes with the driving gear on its side, and the driving gear is connected to the output shaft of a drive motor fixed on the end cover. A sun gear is sleeved on the outer ring of the lower opening of the feed pipe, and multiple planetary gears mesh on the outer ring of the sun gear. A rotating ring is rotatably disposed on the lower surface of the end cover, and multiple planetary gears are rotatably connected to the rotating ring through multiple rotating columns. The outer rings of the multiple planetary gears mesh with the gear ring installed on the lower surface of the end cover. A stirring rod is installed on the lower surface of each planetary gear, and a helical blade is sleeved on each stirring rod.

[0009] Furthermore, each of the stirring rods has two scrapers connected to its lower end face, and the two scrapers are arranged in a cross shape, with the lower surface of the scrapers in contact with the upper surface of the support plate.

[0010] Furthermore, the support plate has multiple discharge square holes arranged in a circumferential array, and each discharge square hole is provided with a sealing opening and closing assembly. The sealing opening and closing assembly includes a sealing plate, an elastic sealing strip, a rubber connecting strip, a hinge block, and an electric push rod. Multiple sealing plates are slidably inserted into multiple discharge square holes, and each sealing plate has an elastic sealing strip on three outer sides. The other outer side of the sealing plate is hinged to the discharge square hole through the rubber connecting strip. A hinge block is fixed on the lower surface of the sealing plate, and the inclined side of the hinge block is connected to the piston rod of the electric push rod. The fixing rod of the electric push rod is connected to the conical ring surface of the drying cylinder.

[0011] Furthermore, the bottom end of the conical drying cylinder is truncated cone-shaped, and multiple scrapers are connected to the connecting shaft, with the multiple scrapers rotatably contacting the bottom surface of the truncated cone.

[0012] Furthermore, a support pad is installed on the lower surface of each of the support legs, and the support pad is detachably connected to the support leg.

[0013] The present invention has the following beneficial effects:

[0014] 1. This invention, by setting a columnar mesh cylinder and an isolation mesh cylinder inside the drying drum, allows the air-blowing rings that slide up and down inside the columnar mesh cylinder to fill the hot air from the air inlet pipe at the same temperature to different heights within the columnar mesh cylinder. Furthermore, the air guide pipe sprays the hot air through multiple air guide holes on the air-blowing plate, ensuring that the blown-in hot air flows circumferentially and laterally at different positions within the columnar mesh cylinder without temperature differences. This improves the rapid and uniform drying of grains within the drying chamber formed between the columnar mesh cylinder and the isolation mesh cylinder, preventing damage to some grains due to excessively high local temperatures within the drying chamber, thus ensuring the quality of the grain drying within the dryer.

[0015] 2. This invention, by setting up a stirring and tumbling assembly inside the drying chamber, utilizes the interaction of a sun gear, planetary gears, and a gear ring on the lower surface of the end cover. This allows the planetary gears to drive multiple stirring rods to rotate both around the cylindrical mesh and on their own axes within the drying chamber. The rotation of the stirring rods then drives the spiral blades to tumble the grains within the drying chamber, ensuring that hot air blown in from different positions can achieve large-area contact drying of the tumbling grains. Meanwhile, the multiple spiral blades rotating around the cylindrical mesh can also tumble and stir the grains at different positions within the drying chamber. This prevents grains from failing to fully contact the hot air in the same location, thereby improving the efficiency and quality of the grain drying process within the drying chamber.

[0016] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this disclosure;

[0019] Figure 2 This is a schematic diagram of the internal structure of the drying oven according to an embodiment of the present disclosure;

[0020] Figure 3 This is a cross-sectional view of the drying oven according to an embodiment of this disclosure;

[0021] Figure 4 This is a cross-sectional view of a columnar mesh tube according to an embodiment of this disclosure.

[0022] In the diagram: 1. Support leg; 2. Drying cylinder; 21. End cap; 22. Cylindrical cylinder; 221. Suction port; 23. Conical cylinder; 231. Discharge chute; 24. Drying chamber; 3. Feed pipe; 4. Columnar mesh cylinder; 5. Isolation mesh cylinder; 6. Blower drying assembly; 61. Support plate; 611. Discharge square hole; 62. Sealing ring; 63. Air inlet pipe; 64. Suction ring; 65. Exhaust pipe; 66. Rotating screw; 67. Connecting shaft; 68. Air guide pipe 69. Air bleed disc; 691. Air guide hole; 7. Stirring and tumbling assembly; 71. Driving gear; 72. Driven gear; 73. Sun gear; 74. Planetary gear; 75. Rotating ring; 76. Rotating column; 77. Gear ring; 78. Stirring rod; 79. Spiral blade; 791. Scraper; 8. Sealing opening and closing assembly; 81. Sealing plate; 82. Elastic sealing strip; 83. Rubber connecting strip; 84. Hinge block; 85. Electric push rod; 9. Scraper. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-4 As shown, the present invention is a fully automatic grain dryer, including support legs 1, multiple support legs 1 surrounding the outer surface of the drying cylinder 2, a feed pipe 3 provided on the end cap 21 of the drying cylinder 2, and a discharge trough 231 provided on the lower outer side of the drying cylinder 2, a columnar mesh cylinder 4 with its opening facing downwards vertically fixed in the center of the drying cylinder 2, an isolation mesh cylinder 5 provided on the inner surface of the drying cylinder 2, a drying chamber 24 formed between the isolation mesh cylinder 5 and the columnar mesh cylinder 4, a blower drying assembly 6 provided on the drying cylinder 2, and a stirring and tumbling assembly 7 provided inside the drying chamber 24;

[0025] In the design scheme of this invention, when the dryer of this invention needs to dry grains, the operator rotates the conveying pipe to the feed pipe 3, and then conveys the grains to be dried into the drying cylinder 2 through the conveying pipe and the feed pipe 3. At this time, the grains fall into the drying chamber 24 formed between the columnar mesh cylinder 4 and the isolation mesh cylinder 5. At this time, the blower drying component 6 sends hot air into the columnar mesh cylinder 4, and then discharges it through the columnar cylinder 22 of the drying cylinder 2. This allows the hot air to form a ring-shaped crossflow in the drying cylinder 2 to dry the grains in the drying chamber 24. At the same time, when the hot air enters, the stirring and tumbling component 7 rotates in a circle in the drying chamber 24 to stir and tumble the grains at different positions, preventing the grains from always accumulating in the same position and contacting the blown hot air, thus affecting the drying effect of the grains. The dried grains fall into the conical cylinder 23 below the drying cylinder 2, and are then discharged and collected through the discharge chute 231.

[0026] In one embodiment of the present invention, the blower drying assembly 6 includes a support plate 61, a sealing ring 62, an air inlet pipe 63, a suction ring 64, and an exhaust pipe 65. The support plate 61 is installed at the connection between the cylindrical tube 22 and the conical tube 23 of the drying cylinder 2, and the support plate 61 is used to support the cylindrical mesh tube 4. The sealing ring 62 is fixed at the lower end of the cylindrical mesh tube 4. One end of the air inlet pipe 63 passes through the drying cylinder 2 and connects to the upper surface of the sealing ring 62, and the other end of the air inlet pipe 63... The pipe extends out of the drying cylinder 2 and is connected to the conveying pipe of the hot air blower. A vacuum suction ring 64 with a cavity structure is fixed in the middle of the cylindrical cylinder 22 of the drying cylinder 2. Multiple suction holes 221 are opened in the circumference of the middle cylindrical cylinder 22 of the drying cylinder 2. The vacuum suction ring 64 with a cavity structure and the isolation net cylinder 5 at both ends of the multiple suction holes 221 are connected to the isolation cavity formed by the inner wall of the drying cylinder 2. Multiple exhaust pipes 65 are connected to the outer ring surface of the suction ring 64. The pipe opening of each exhaust pipe 65 is connected to the pump pipe of the pump evenly suctioned.

[0027] In the design of this invention, after the grain to be dried is fed into the drying chamber 24 through the feed pipe 3, the grain is positioned below the top of the columnar mesh cylinder 4. Then, the operator controls the hot air blower through the control box on the side of the dryer, causing it to send hot air into the columnar mesh cylinder 4 through the air inlet pipe 63. At this time, the suction force generated by the suction pump acts on the suction ring 64 of the hollow structure through multiple exhaust pipes 65. Since the isolation cavity formed by the isolation mesh cylinder 5 and the inner wall of the drying cylinder 2 is connected to the suction ring 64 through the suction hole 221, thus... The suction ring 64 draws away the hot air from the columnar mesh cylinder 4, causing the hot air entering the columnar mesh cylinder 4 to flow laterally in a circular array to the isolation mesh cylinder 5 on the inner wall of the drying cylinder 2. This achieves large-area drying of the grains accumulated in the drying chamber 24. At the same time, the stirring and tumbling component 7 in the drying chamber 24 stirs and turns the grains accumulated in the drying chamber 24, allowing the grains to come into contact with the crossflow of hot air while tumbling, thereby improving the drying efficiency and quality of the grains in the drying cylinder 2.

[0028] In one embodiment of the present invention, the blower drying assembly 6 further includes a rotating screw 66, a connecting shaft 67, an air guide pipe 68, and an air-blowing disc 69. The rotating screw 66 is rotatably inserted into the columnar mesh cylinder 4, and the bottom end face of the rotating screw 66 extends out of the sealing ring 62 and is connected to the output shaft of the drive motor fixed to the bottom end face of the drying cylinder 2 through the connecting shaft 67. The air guide pipe 68 is slidably inserted into the air inlet pipe 63. The air-blowing disc 69 with a cavity structure is sleeved on the rotating screw 66 through the screw nut, and the air-blowing disc 69 is located inside the columnar mesh cylinder 4. The lower end face of the air-blowing disc 69 is connected to the air guide pipe 68, and the upper surface of the air-blowing disc 69 is provided with an air guide hole 691.

[0029] In the design of this invention, in order to prevent the temperature of the hot air entering the bottom of the columnar mesh cylinder 4 from being higher than the temperature at the top, thereby affecting the drying effect of the grains above the drying chamber 24, when the hot air enters the columnar mesh cylinder 4 through the air inlet pipe 63, the operator controls the drive motor fixed at the lower end of the drying cylinder 2 to rotate intermittently forward and reverse, so that it drives the rotating screw 66 to rotate inside the columnar mesh cylinder 4 through the connecting shaft 67. Since the air guide pipe 68 is slidably inserted into the air inlet pipe 63 and is connected to the air blower plate 69, the rotating screw 66 will drive the air blower plate 69 to slide up and down inside the columnar mesh cylinder 4. Then, the air guide pipe 68 will spray the hot air into the air blower plate 69 through multiple air guide holes 691 opened on the air blower plate 69, so that the blown hot air can flow horizontally in a circular motion at different positions of the columnar mesh cylinder 4 without temperature difference, thereby improving the uniformity and quality of drying of the grains in the drying cylinder 2.

[0030] In one embodiment of the present invention, the stirring and tumbling assembly 7 includes a driving gear 71, a driven gear 72, a sun gear 73, a planetary gear 74, a rotating ring 75, a rotating column 76, a gear ring 77, a stirring rod 78, and a spiral blade 79. The feed pipe 3 is rotatably inserted into the end cover 21, and the driven gear 72 is sleeved on the feed pipe 3. The driven gear 72 is located on the upper surface of the end cover 21. The driven gear 72 meshes with the driving gear 71 on its side, and the driving gear 71 is connected to the output shaft of the drive motor fixed on the end cover 21. The feed pipe 3 is connected to a sun gear 73 on the outer ring of the lower opening, and a plurality of planetary gears 74 are meshed on the outer ring of the sun gear 73. A rotating ring 75 is rotatably provided on the lower surface of the end cover 21, and a plurality of planetary gears 74 are rotatably connected to the rotating ring 75 through a plurality of rotating columns 76. The outer rings of the plurality of planetary gears 74 are all meshed with a gear ring 77 installed on the lower surface of the end cover 21. A stirring rod 78 is installed on the lower surface of each planetary gear 74, and a spiral blade 79 is sleeved on each stirring rod 78.

[0031] In the design of this invention, when it is necessary to stir and turn the grains being dried in the drying chamber 24, the operator controls the drive motor fixed above the end cover 21 to operate, causing its output shaft to drive the feed pipe 3 to rotate through the driving gear 71 and the meshing driven gear 72. The rotating feed pipe 3 extends into the drying cylinder 2 and, through the sun gear 73 and the mating gear ring 77, drives multiple planetary gears 74 to rotate around the feed pipe 3 on the lower surface of the end cover 21. Simultaneously, the multiple planetary gears 74 also rotate on their own axes. Therefore, when the multiple planetary gears 74 rotate, they will... Multiple stirring rods 78 drive multiple spiral blades 79 to rotate within the drying chamber 24. Therefore, the rotating spiral blades 79 will convey and turn the grain at the bottom of the drying chamber 24 upwards. When multiple planetary gears 74 rotate around the feed pipe 3, they will drive the multiple spiral blades 79 to rotate within the drying chamber 24. This allows the multiple spiral blades 79 to both rotate on their own axis and revolve around the central axis to stir and turn the grain at different positions within the drying chamber 24. This improves the efficiency of the hot air flowing laterally around the circumference, enabling rapid and efficient drying of the grain turned at different positions.

[0032] In one embodiment of the present invention, each stirring rod 78 is connected to two scrapers 791 at its lower end, and the two scrapers 791 are arranged in a cross shape. The lower surface of the scrapers 791 is in contact with the upper surface of the support plate 61. As designed by the present invention, when the stirring rod 78 rotates and revolves in the drying chamber 24, the two scrapers 791 arranged in a cross shape will also stir and scrape the grains in contact with the support plate 61, thereby enabling the grains in different positions in the drying chamber 24 to be dried.

[0033] In one embodiment of the present invention, the support plate 61 is provided with a plurality of discharge square holes 611 arranged in a circumferential array, and each discharge square hole 611 is provided with a sealing opening and closing component 8. The sealing opening and closing component 8 includes a sealing plate 81, an elastic sealing strip 82, a rubber connecting strip 83, a hinge block 84 and an electric push rod 85. The plurality of sealing plates 81 are slidably inserted into the plurality of discharge square holes 611, and each sealing plate 81 has an elastic sealing strip 82 on three outer sides. The other outer side of the sealing plate 81 is hinged to the discharge square hole 611 through the rubber connecting strip 83. The lower surface of the sealing plate 81 is fixed with a hinge block 84, and the inclined side of the hinge block 84 is connected to the piston rod of the electric push rod 85. The fixing rod of the electric push rod 85 is connected to the conical cylinder 23 ring surface of the drying cylinder 2.

[0034] In the design of this invention, when the dried grain needs to be discharged through the discharge chute 231 below, the operator controls the piston rods of multiple electric push rods 85 to retract, causing them to drive the sealing plate 81 inserted into the discharge square hole 611 to swing downwards and open at a certain angle through the hinge block 84. At this time, the elastic sealing strips 82 on the three outer sides of the sealing plate 81 will disengage from the discharge square hole 611, while the rubber connecting strip 83 on the other side will be stretched and deformed due to the inclination of the sealing plate 81. Therefore, when the sealing plate 81 opens from the discharge square hole 611, the grain located in the drying chamber 24 will continuously flow through the discharge square hole 611 to the discharge chute 231 on the lower outer side of the conical cylinder 23. Then, the discharged grain is collected to prevent the grain located on the support plate 6 from being discharged. 1. Grains in other locations cannot be discharged from the discharge square hole 611 in time. At this time, the processing personnel can drive the stirring rod 78 to rotate, which will drive the scraper 791 at the bottom to rotate and scrape on the upper surface of the support plate 61, thereby making it easier to scrape the grains remaining on the upper surface of the support plate 61 to the discharge square hole 611 for quick discharge. After the dried grains in the drying chamber 24 are discharged, the piston rod of the electric push rod 85 is extended, which drives the sealing plate 81 to swing and insert into the discharge square hole 611 through the hinge block 84. The elastic sealing strip 82 will seal the gap between the discharge square hole 611 and the sealing plate 81. When the grains fall from the drying chamber 24 above the support plate 61, they may fall to the bottom of the drying cylinder 2, which will affect the sealing and drying effect of the drying chamber 24 on the grains.

[0035] In one embodiment of the present invention, the lower bottom of the conical cylinder 23 of the drying cylinder 2 is truncated cone-shaped. Multiple scraper blades 9 are connected to the connecting shaft 67, and the multiple scraper blades 9 rotate in contact with the bottom surface of the truncated cone. As designed in the present invention, when the grains in the drying chamber 24 fall into the conical cylinder 23 through the discharge square hole 611 and are discharged through the discharge chute 231, the forward and reverse rotation of the connecting shaft 67 will scrape the bottom of the conical cylinder 23 of the drying cylinder 2 through the scraper blades 9 in contact with the truncated cone, so that the falling grains can be quickly discharged and collected through the discharge chute 231, and the grains will not accumulate in the conical cylinder 23.

[0036] In one embodiment of the present invention, a support pad is installed on the lower surface of each support leg 1, and the support pad is detachably connected to the support leg 1.

[0037] Working principle:

[0038] When the dryer of this invention is needed to dry grains, the operator connects the conveyor pipe to the feed pipe 3, and then conveys the grains to be dried into the drying cylinder 2 through the conveyor pipe and feed pipe 3. The grains fall into the drying chamber 24 formed between the columnar mesh cylinder 4 and the isolation mesh cylinder 5. The operator then controls the hot air blower through the control box on the side of the dryer, sending hot air into the columnar mesh cylinder 4 through the air inlet pipe 63. Meanwhile, the suction force generated by the suction pump acts on the suction ring 64 of the hollow structure through multiple exhaust pipes 65. Since the isolation chamber formed by the isolation mesh cylinder 5 and the inner wall of the drying cylinder 2 is connected to the suction ring 64 through the suction hole 221, the suction ring 64 draws away the hot air from the columnar mesh cylinder 4. The operator controls the drive motor fixed above the end cover 21 to operate, causing its output shaft to drive the feed pipe 3 to rotate through the drive gear 71 and the meshing driven gear 72. The feed pipe 3 rotates and extends into the drying cylinder 2. Through the sun gear 73 and the matching gear ring 77, it drives multiple planetary gears 74 to rotate around the feed pipe 3 on the lower surface of the end cover 21. At the same time, the multiple planetary gears 74 also rotate on their own axis. Therefore, when the multiple planetary gears 74 rotate on their own axis, they drive multiple spiral blades 79 to rotate on their own axis within the drying chamber 24 through multiple stirring rods 78. Thus, the multiple rotating spiral blades 79 will convey and turn the grain at the bottom of the drying chamber 24 upwards. When the multiple planetary gears 74 rotate around the feed pipe 3, they will drive multiple spiral blades 79 to rotate on their own axis within the drying chamber 24. This allows the multiple spiral blades 79 to both rotate on their own axis and revolve around the center to stir and turn the grain at different positions in the drying chamber 24. As a result, the hot air sent into the columnar mesh cylinder 4 will form a circumferential array and flow laterally to the isolation mesh cylinder 5 on the inner wall of the drying cylinder 2, thereby achieving large-area drying of the grain accumulated in the drying chamber 24.

[0039] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fully automatic grain dryer, comprising support legs (1), characterized in that, Multiple support legs (1) surround the outer ring surface of the drying cylinder (2). The end cap (21) of the drying cylinder (2) is provided with a feed pipe (3), and the lower outer side of the drying cylinder (2) is provided with a discharge trough (231). A columnar mesh cylinder (4) with its opening facing downward is vertically fixed in the center of the drying cylinder (2). An isolation mesh cylinder (5) is provided on the inner ring surface of the drying cylinder (2). A drying chamber (24) is formed between the isolation mesh cylinder (5) and the columnar mesh cylinder (4). A blower drying assembly (6) is provided on the drying cylinder (2), and a stirring and tumbling assembly (7) is provided inside the drying chamber (24). The blower drying assembly (6) includes a support plate (61), a sealing ring (62), an air inlet pipe (63), a suction ring (64), and an exhaust pipe (65). The support plate (61) is installed at the connection between the cylindrical tube (22) and the conical tube (23) of the drying cylinder (2), and the support plate (61) is used to support the cylindrical mesh tube (4). A sealing ring (62) is fixed at the lower end of the cylindrical mesh tube (4). One end of the air inlet pipe (63) passes through the drying cylinder (2) and connects to the upper surface of the sealing ring (62), and the other end of the air inlet pipe (63) extends out of the drying cylinder (2) and connects to the conveying pipe of the hot air blower. A suction ring (64) with a cavity structure is fixed in the middle of the cylindrical tube (22) of the drying cylinder (2). The cylindrical tube (22) of the drying cylinder (2) has multiple suction holes (221) on its circumference in the middle. The suction holes (221) are connected to the inner wall of the drying cylinder (2) by suction rings (64) and isolation nets (5) with hollow structures at both ends. The outer ring of the suction ring (64) is connected to multiple exhaust pipes (65), and the pipe opening of each exhaust pipe (65) is connected to the pump pipe of the suction pump. The blower drying assembly (6) also includes a rotating screw (66), a connecting shaft (67), an air guide pipe (68), and an air blower plate (69). The rotating screw (66) is inserted into the cylindrical net (4) by rotation, and the bottom end of the rotating screw (66) extends out of the sealing ring (62) and is connected to the bottom of the drying cylinder (2) through the connecting shaft (67). The output shaft of the drive motor is fixed at the end face. A guide pipe (68) is slidably inserted into the air inlet pipe (63). A cavity-structured air-blowing disc (69) is sleeved on the rotating screw (66) through a screw nut. The air-blowing disc (69) is located inside the columnar mesh cylinder (4). The lower end face of the air-blowing disc (69) is connected to the guide pipe (68). An air-blowing hole (691) is opened on the upper surface of the air-blowing disc (69). The stirring and tumbling assembly (7) includes a driving gear (71), a driven gear (72), a sun gear (73), a planetary gear (74), a rotating ring (75), a rotating column (76), a gear ring (77), a stirring rod (78), and a spiral blade (79). The feed pipe (3) is rotatably inserted into the end cover (21). A driven gear (72) is sleeved on the feed pipe (3). The driven gear (72) is located on the upper surface of the end cover (21). The driven gear (72) is meshed with a driving gear (71) on its side. The driving gear (71) is connected to the output shaft of the drive motor fixed on the end cover (21). A sun gear (73) is sleeved on the outer ring surface of the lower opening of the feed pipe (3). Multiple planetary gears (74) are meshed on the outer ring surface of the sun gear (73). A rotating ring (75) is rotatably provided on the lower surface of the end cover (21). Multiple planetary gears (74) are rotatably connected to the rotating ring (75) through multiple rotating columns (76). The outer ring surfaces of multiple planetary gears (74) mesh with a gear ring (77) installed on the lower surface of the end cover (21).Each planetary gear (74) has a stirring rod (78) mounted on its lower surface. Each stirring rod (78) is fitted with a spiral blade (79). Each stirring rod (78) has two scrapers (791) connected to its lower end face. The two scrapers (791) are arranged in a cross shape. The lower surface of the scrapers (791) is in contact with the upper surface of the support plate (61). The support plate (61) has a plurality of discharge square holes (611) arranged in a circumferential array. Each discharge square hole (611) is provided with a sealing opening and closing assembly (8). The sealing opening and closing assembly (8) includes a sealing plate (81) and an elastic sealing strip (82). The sealing plates (81) are slidably inserted into multiple discharge square holes (611), and each sealing plate (81) has an elastic sealing strip (82) on three outer sides. The other outer side of the sealing plate (81) is hinged to the discharge square hole (611) through the rubber connecting strip (83). The lower surface of the sealing plate (81) is fixed with a hinge block (84), and the inclined side of the hinge block (84) is connected to the piston rod of the electric push rod (85). The fixing rod of the electric push rod (85) is connected to the conical cylinder (23) ring surface of the drying cylinder (2).

2. The fully automatic grain dryer according to claim 1, characterized in that, The bottom end of the conical cylinder (23) of the drying cylinder (2) is truncated cone-shaped. Multiple scrapers (9) are connected to the connecting shaft (67), and the multiple scrapers (9) are in rotatable contact with the bottom surface of the truncated cone.

3. The fully automatic grain dryer according to claim 1, characterized in that, Each of the support legs (1) has a support pad installed on its lower surface, and the support pad is detachably connected to the support leg (1).

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