An efficient grain dryer with uniform drying

Abstract

The present invention relates to the technical field of dryers, and specifically relates to an efficient grain dryer with uniform drying, which includes a grain bin. At the top inside the grain bin, a screw elevator is installed. At the top of the grain bin, a driving mechanism is installed. The driving mechanism is connected to the first rotating shaft and the upper cylinder body. Inside the grain bin, a drying cylinder is arranged. Far-infrared tubes are installed inside the drying cylinder. At the bottom of the drying cylinder, a baffle assembly that can be opened is provided. When the dryer of the present invention dries grains, the grains at the bottom of the grain bin are continuously conveyed upward by the screw elevator, and then are successively put into four drying cylinders through a discharge pipe. And when put into one drying cylinder, the baffle assembly at the bottom of this drying cylinder is in a closed state, so that the grains can stay in the drying cylinder for a period of time, enabling the far-infrared tubes inside the drying cylinder to efficiently irradiate and dry the grains. At the same time, the grains stored temporarily in the drying cylinder can also make the grains at the bottom of the grain bin be conveyed upward as much as possible, avoiding grain accumulation.

Description

Technical Field

[0001] The present invention relates to the technical field of dryers, and specifically to a high-efficiency grain dryer with uniform drying. Background Art

[0002] When the existing grain drying bin dries grains, the spiral elevator conveys the grains at the bottom of the grain bin upward and then puts them into the grain bin, and at the same time, countercurrent hot air is used to dry the grains. However, when this drying device dries the grains, due to the relatively fast falling speed of the grains, the contact time between the grains and the hot air is short, resulting in an unsatisfactory drying effect. At the same time, the lifted grains quickly fall back into the grain bin, causing a large accumulation of grains at the bottom of the grain bin and not being able to discharge moisture well. Therefore, the present invention has developed a high-efficiency grain dryer with uniform drying to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-efficiency grain dryer with uniform drying, which can efficiently dry the grains in the grain bin and improve the drying efficiency.

[0004] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0005] A high-efficiency grain dryer with uniform drying, including a grain bin with a conical cross-section at the bottom. A spiral elevator is installed at the top of the inner cavity of the grain bin, and there is a spacing between the spiral elevator and the bottom of the inner cavity of the grain bin. The spiral elevator includes a lower cylinder body and an upper cylinder body that are rotatably connected to each other. A discharge pipe is communicated with the side wall of the upper cylinder body. A first rotating shaft is rotatably connected to the top of the inner cavity of the upper cylinder body, and a first spiral blade is arranged on the outer wall of the first rotating shaft. Both the first rotating shaft and the first spiral blade pass through the bottom of the lower cylinder body. A driving mechanism is installed at the top of the grain bin. The driving mechanism is respectively connected to the first rotating shaft and the upper cylinder body, and while driving the first rotating shaft to continuously rotate, the driving mechanism drives the upper cylinder body to intermittently rotate by 90 degrees. Four drying cylinders are arranged in the inner cavity of the grain bin around the spiral elevator at equal angles, and the feed inlet of the drying cylinder is located below the discharge pipe. A plurality of far-infrared tubes corresponding to being inserted into the inner cavity of each drying cylinder are installed at the top of the inner cavity of the grain bin. A baffle assembly that can be opened is arranged at the bottom of the drying cylinder. An abutting member that rotates with the upper cylinder body is arranged on the outer wall of the lower cylinder body. When the abutting member contacts the baffle assembly, the abutting member pushes the baffle assembly to open. The discharge pipe and the abutting member are respectively located on opposite sides of the spiral elevator.

[0006] Preferably, feed hoppers are installed at the top of the feed inlets of the four drying cylinders, and the four feed hoppers are sequentially connected to each other and are respectively connected to the inner wall of the grain bin. An inclined third inclined surface is arranged at the connecting part of the four feed hoppers.

[0007] Preferably, an exhaust pipe is connected to the side wall of the grain bin, and the exhaust pipe is located below the feed hopper. A high-pressure induced draft fan and a humidity sensor are arranged on the exhaust pipe.

[0008] Preferably, the baffle assembly includes a fixed ring installed at the bottom of the drying cylinder. A hollow mounting seat is installed on the side wall of the fixed ring. On opposite sides of the inner cavity of the mounting seat, mounting shafts are symmetrically and rotatably connected. A connecting bar is fixedly connected to the outer wall of the mounting shaft. One ends of the two connecting bars both penetrate through the side wall of the mounting seat and are installed with semicircular baffles that cooperate with each other. The top of the semicircular baffle abuts against the bottom of the fixed ring to seal the bottom of the drying cylinder. A rotating gear is fixedly connected to the outer wall of the mounting shaft and is located below the semicircular baffle. One end of the mounting seat away from the fixed ring penetrates and is slidably connected with a sliding bar. On opposite side walls of the end of the sliding bar inserted into the inner cavity of the mounting seat, racks that cooperate with the two rotating gears are respectively arranged. One end of the sliding bar located outside the mounting seat is fixedly connected with an abutting block, and a sloping first inclined surface is arranged at one end of the abutting block. A spring is sleeved on the outer wall of the sliding bar, and the spring is located between the abutting block and the mounting seat.

[0009] Preferably, the abutting member includes a first connecting rod fixed at one end to the outer wall of the upper cylinder body and a rotating cylinder sleeved on the outer wall of the lower cylinder body. The first connecting rod is connected to the rotating cylinder. An arc-shaped protrusion that cooperates with the abutting block is arranged on the outer wall of the rotating cylinder, and the arc-shaped protrusion is arranged opposite to the discharge pipe. A second inclined surface that cooperates with the first inclined surface is arranged at the end of the arc-shaped protrusion that first contacts the abutting block.

[0010] Preferably, a plurality of arc-shaped protrusions are arranged at intervals along the height direction on the outer wall of the rotating cylinder, and the arc length of the arc-shaped protrusions in each layer gradually increases. The arc-shaped protrusion at the uppermost layer is circular. Third inclined surfaces are arranged at the top and bottom of each arc-shaped protrusion. Fourth inclined surfaces are arranged at the top and bottom of the abutting block.

[0011] Preferably, the driving mechanism includes a box body installed on the top of the grain bin. A driving motor is fixedly connected to the top of the box body, and the output end of the driving motor is fixedly connected to the top of the first rotating shaft. A first incomplete gear is sleeved on the outer wall of the first rotating shaft. An internal gear ring and a first intermediate gear are rotatably connected to the top of the box body. The first incomplete gear and the internal gear ring are both meshed with the first intermediate gear. Second connecting rods are installed at equal angles at the bottom of the internal gear ring, and the second connecting rods are fixedly connected to the side wall of the top of the upper cylinder body.

[0012] Preferably, a second rotating shaft sleeving the far-infrared tube is rotatably connected to the top of the inner cavity of the grain bin. A second spiral blade is fixedly connected to the outer wall of the second rotating shaft. A driven gear is sleeved on the outer wall of the second rotating shaft. A second incomplete gear is fixedly connected to the outer wall of the first rotating shaft. A second transition gear is rotatably connected to the outer wall of one of the second connecting rods, and the second transition gear is meshed with one of the four groups of driven gears in sequence.

[0013] Preferably, the second transition gear is arranged between the discharge pipe and the arc-shaped protrusion. After the discharge pipe rotates 90 degrees, the second transition gear is meshed with one of the groups of driven gears.

[0014] Preferably, electric cylinders are symmetrically and fixedly connected to the top of the box body on opposite sides. The four driven gears are connected by a connecting plate. The driven gear is slidably connected to the second rotating shaft. The telescopic end of the electric cylinder is connected to the connecting plate. Fixed blocks are symmetrically and rotatably connected to the outer wall of the rotating cylinder on opposite sides. The telescopic end of the electric cylinder passes through the connecting plate and is connected to the fixed block. A through hole matching the first connecting rod is formed through the rotating cylinder. When the electric cylinder drives the rotating cylinder to descend so that the arc-shaped protrusion at the uppermost position abuts against the abutting block, the driven gear is synchronously driven to descend and is not meshed with the second transition gear.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] When the dryer of the present invention dries grains, the grains at the bottom of the grain bin are continuously conveyed upward by the spiral elevator, and then are sequentially put into the four drying cylinders through the discharge pipe. When put into one drying cylinder, the baffle assembly at the bottom of the drying cylinder is in a closed state, so that the grains can be retained in the drying cylinder for a period of time, enabling the far-infrared tubes in the drying cylinder to efficiently irradiate and dry the grains. At the same time, the grains temporarily stored in the drying cylinder can also make the grains at the bottom of the grain bin be conveyed upward as much as possible, avoiding grain accumulation. Then, when the discharge pipe rotates to the upper side of the next group of drying cylinders again, it can drive the abutting block to abut against the cover plate assembly on the upper group of drying cylinders and open the cover plate assembly, so that the grains in the drying cylinder are discharged for circulation. Thus, both the circulating drying of the grains is realized and the contact time between the grains and the far-infrared tubes is increased, improving the drying efficiency. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1Schematic structural diagram of the grain dryer of the present invention;

[0019] Figure 2 Partial front sectional structural diagram of the grain dryer of the present invention;

[0020] Figure 3 Schematic structural diagram of the grain bin of the grain dryer of the present invention after removing the bin body;

[0021] Figure 4 is Figure 3 front sectional structural diagram;

[0022] Figure 5 Schematic structural diagram of the screw feeder and its connecting components in the grain dryer of the present invention;

[0023] Figure 6 Schematic structural diagram of the baffle assembly in the grain dryer of the present invention;

[0024] Figure 7 Partial top sectional structural diagram of the baffle assembly in the grain dryer of the present invention;

[0025] Figure 8 Schematic structural diagram of the drive mechanism in the grain dryer of the present invention;

[0026] Figure 9 is Figure 8 front sectional structural diagram.

[0027] In the drawings, the list of components represented by each reference numeral is as follows:

[0028] 1. Grain bin; 2. Screw elevator; 21. Lower cylinder; 22. Upper cylinder; 23. Discharge pipe; 24. First rotating shaft; 25. First spiral blade; 3. Drive mechanism; 31. Box body; 32. Drive motor; 33. First incomplete gear; 34. Internal gear ring; 35. First intermediate gear; 36. Second connecting rod; 37. Second incomplete gear; 38. Second intermediate gear; 4. Drying cylinder; 41. Second rotating shaft; 42. Second spiral blade; 43. Driven gear; 5. Far-infrared tube; 6. Baffle assembly; 61. Fixed ring; 62. Mounting seat; 63. Mounting shaft; 64. Connecting strip; 65. Semi-circular baffle; 66. Rotating gear; 67. Sliding strip; 68. Rack; 69. Contact block; 610. Spring; 7. Contact member; 71. First connecting rod; 72. Rotating cylinder; 73. Arc-shaped protrusion; 74. Fixed block; 8. Feed hopper; 9. Exhaust pipe; 10. Electric cylinder; 11. Connecting plate. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] As Figures 1-9 shown: One embodiment of the present invention is:

[0031] An efficient grain dryer with uniform drying, including a grain bin 1 with a conical cross-section at the bottom. A screw elevator 2 is installed at the top of the inner cavity of the grain bin 1, and there is a spacing between the screw elevator 2 and the bottom of the inner cavity of the grain bin 1. The screw elevator 2 includes a lower cylinder body 21 and an upper cylinder body 22 that are rotatably connected to each other. A discharge pipe 23 is communicated with the side wall of the upper cylinder body 22. A first rotating shaft 24 is rotatably connected to the top of the inner cavity of the upper cylinder body 22, and a first spiral blade 25 is arranged on the outer wall of the first rotating shaft 24. Both the first rotating shaft 24 and the first spiral blade 25 pass through the bottom of the lower cylinder body 21. A driving mechanism 3 is installed at the top of the grain bin 1. The driving mechanism 3 is respectively connected to the first rotating shaft 24 and the upper cylinder body 22, and while the driving mechanism 3 drives the first rotating shaft 24 to rotate continuously, it drives the upper cylinder body 22 to rotate intermittently by 90 degrees. Four drying cylinders 4 are arranged in the inner cavity of the grain bin 1 at equal angles around the screw elevator 2, and the feed inlet of the drying cylinder 4 is located below the discharge pipe 23. A plurality of far-infrared tubes 5 corresponding to being inserted into the inner cavity of each drying cylinder 4 are installed at the top of the inner cavity of the grain bin 1. A baffle assembly 6 that can be opened is arranged at the bottom of the drying cylinder 4. An abutting member 7 that rotates with the upper cylinder body 22 is arranged on the outer wall of the lower cylinder body 21, and when the abutting member 7 contacts the baffle assembly 6, the abutting member 7 pushes the baffle assembly 6 to open. The discharge pipe 23 and the abutting member 7 are respectively located on opposite sides of the screw elevator 2.

[0032] In this embodiment, in order to enable the grains to also fall into the drying cylinder during the rotation of the discharge port, therefore, feed hoppers 8 are installed at the top of the feed inlets of the four drying cylinders 4, and the four feed hoppers 8 are sequentially connected to each other and are respectively connected to the inner wall of the grain bin 1. An inclined third inclined plane is arranged at the connecting part of the four feed hoppers 8. The connection of the four feed hoppers to each other can form a closed structure, so that when the discharge pipe rotates, the grains discharged from the discharge pipe can also all fall into the drying cylinder, and it will not cause the grains to directly fall to the bottom of the grain bin. The arranged third inclined plane can prevent the grains from accumulating at the connection (as Figure 3 shown, and Figure 3 the feed hopper in is only a schematic diagram, and its shape can be conical or funnel-shaped).

[0033] In this embodiment, in order to accurately judge the drying effect of the grains in the grain bin, an exhaust pipe 9 is connected to the side wall of the grain bin 1, and the exhaust pipe 9 is located below the feed hopper 8. A high-pressure induced draft fan and a humidity sensor are provided on the exhaust pipe 9. Setting the exhaust pipe below the feed hopper can accurately detect the humidity of the grains after being dried by the drying cylinder and mixed with the grains at the bottom of the grain bin, so as to adjust the power of the far-infrared tube. The high-pressure induced draft fan can accelerate the air circulation in the grain bin, and a plurality of ventilation holes are formed in the outer wall of the drying cylinder.

[0034] In this embodiment, in order to enable the baffle assembly to be automatically opened under the push of the abutting member and to be automatically closed after the abutting member is separated from the baffle assembly, the structures of the baffle assembly and the abutting member are as follows:

[0035] The baffle assembly 6 includes a fixed ring 61 installed at the bottom of the drying cylinder 4. A hollow mounting seat 62 is installed on the side wall of the fixed ring 61. Two opposite sides of the inner cavity of the mounting seat 62 are symmetrically rotatably connected with mounting shafts 63. A connecting strip 64 is fixedly connected to the outer wall of the mounting shaft 63. One ends of the two connecting strips 64 both pass through the side wall of the mounting seat 62 and are installed with mutually cooperating semi-circular baffles 65. The top of the semi-circular baffle 65 abuts against the bottom of the fixed ring 61 to seal the bottom of the drying cylinder 4. A rotating gear 66 is fixedly connected to the outer wall of the mounting shaft 63, and the rotating gear 66 is located below the semi-circular baffle 65. One end of the mounting seat 62 away from the fixed ring 61 is penetrated and slidably connected with a sliding strip 67. Opposite side walls of one end of the sliding strip 67 inserted into the inner cavity of the mounting seat 62 are respectively provided with racks 68 that cooperate with the two rotating gears 66. One end of the sliding strip 67 located outside the mounting seat 62 is fixedly connected with an abutting block 69, and an inclined first inclined surface is provided at one end of the abutting block 69. A spring 610 is sleeved on the outer wall of the sliding strip 67, and the spring 610 is located between the abutting block 69 and the mounting seat 62.

[0036] The abutting member 7 includes a first connecting rod 71 with one end fixed to the outer wall of the upper cylinder body 22 and a rotating cylinder 72 sleeved on the outer wall of the lower cylinder body 21. The first connecting rod 71 is connected to the rotating cylinder 72. An arc-shaped protrusion 73 that cooperates with the abutting block 69 is provided on the outer wall of the rotating cylinder 72, and the arc-shaped protrusion 73 is arranged opposite to the discharge pipe 23. A second inclined surface that cooperates with the first inclined surface is provided at one end of the arc-shaped protrusion 73 that first contacts the abutting block. Among them, the rotation of the upper cylinder body can synchronously drive the rotation of the rotating cylinder through the first connecting rod, so that the arc-shaped protrusions on the outer wall of the rotating cylinder can sequentially contact the abutting blocks on the four baffle assemblies, thereby realizing the sequential opening of the four baffle assemblies. When the arc-shaped protrusion contacts the abutting block, the arc-shaped protrusion can push the abutting block, the sliding strip and the rack to slide, so that the rack drives the two rotating gears to rotate synchronously, thereby synchronously driving the connecting strip and the semi-circular baffle to rotate, so that the two semi-circular baffles move away from each other and open, thereby realizing the opening of the bottom of the drying cylinder. Then when the arc-shaped protrusion disengages from the abutting block, the rack gradually returns to its original position under the action of the spring restoring force, so that the two baffles gradually close, thereby realizing the closing of the baffle assembly. The setting of the first inclined surface and the second inclined surface can make the contact between the arc-shaped protrusion and the abutting block smoother. At the same time, an opening for the connecting block to rotate is provided on the side wall of the mounting seat.

[0037] In this embodiment, in order to reduce the residence time of grains in the drying cylinder in the later stage of grain drying, a plurality of arc-shaped protrusions 73 are arranged at intervals along the height direction on the outer wall of the rotating cylinder 72, and the arc length of the arc-shaped protrusions 73 in each layer gradually increases. The arc-shaped protrusion 73 located at the uppermost part is circular. Third inclined surfaces are provided at the top and bottom of each layer of arc-shaped protrusions 73, and fourth inclined surfaces are provided at the top and bottom of the abutting block 69. Among them, in each different period of drying, the height of the rotating cylinder gradually decreases, so that the arc-shaped protrusions at different heights contact the abutting blocks. And the arc length of each layer of arc-shaped protrusions gradually increases, so that the arc-shaped protrusions can contact the abutting blocks earlier when the rotating cylinder rotates, thereby opening the baffle assembly earlier and enabling the grains in the drying cylinder to be discharged faster. And the arc-shaped protrusion of the last layer being circular can make the four baffle assemblies be in the open state at the same time, that is, enable the grains to pass through the drying cylinder at the fastest speed and avoid over-drying of the grains.

[0038] In this embodiment, in order to achieve continuous upward conveying of grains while enabling the discharge pipe to rotate intermittently at equal angles, the driving mechanism 3 includes a box body 31 installed on the top of the grain bin 1. A driving motor 32 is fixedly connected to the top of the box body 31, and the output end of the driving motor 32 is fixedly connected to the top of the first rotating shaft 24. An incomplete first gear 33 is sleeved on the outer wall of the first rotating shaft 24. An internal gear ring 34 and a first intermediate gear 35 are rotatably connected to the top of the box body 31. The incomplete first gear 33 and the internal gear ring 34 are both meshed with the first intermediate gear 35. The second connecting rods 36 are installed at equal angles at the bottom of the internal gear ring 34, and the second connecting rods 36 are fixedly connected to the side wall of the top of the upper cylinder body 22. The driving motor can continuously drive the first rotating shaft and the first spiral blade to rotate, so as to achieve continuous feeding. At the same time, the incomplete first gear intermittently meshes with the first intermediate gear, so that the internal gear ring is driven to rotate intermittently by the same angle, and then the upper cylinder body is driven to rotate by the second connecting rod, so as to realize intermittent and equal-angle rotation of the discharge pipe while achieving continuous feeding.

[0039] In this embodiment, in order to further improve the drying efficiency of the grains in the drying cylinder, a second rotating shaft 41 sleeved outside the far-infrared tube 5 is rotatably connected to the top of the inner cavity of the grain bin 1. A second spiral blade 42 is fixedly connected to the outer wall of the second rotating shaft 41. A driven gear 43 is sleeved on the outer wall of the second rotating shaft 41. An incomplete second gear 37 is fixedly connected to the outer wall of the first rotating shaft 24. A second intermediate gear 38 is rotatably connected to the outer wall of a second connecting rod 36, and the second intermediate gear 38 is meshed with one of the four groups of driven gears 43 in sequence. After the grains fall into a drying cylinder, when the discharge pipe rotates to the next drying cylinder, the second intermediate gear can be driven to rotate to the position of the second rotating shaft corresponding to the drying cylinder filled with grains and meshed with the driven gear. Thus, the incomplete second gear intermittently drives the second intermediate gear and the driven gear to rotate, so that the second rotating shaft and the second spiral blade can rotate intermittently, so that the grains in the drying cylinder can be lifted first and then dropped, and so on, so that the grains can fully contact the far-infrared tube, improving the drying efficiency.

[0040] In this embodiment, in order to prevent excessive accumulation of grains in the drying cylinder, the second intermediate gear 38 is arranged between the discharge pipe 23 and the arc-shaped protrusion 73. After the discharge pipe 23 rotates 90 degrees, the second intermediate gear 38 meshes with one of the driven gears 43, so that after a group of drying cylinders are filled with materials, the second intermediate gear can drive the second spiral blade of the drying cylinder to rotate, so as to realize the reciprocating up and down movement of the grains in the drying cylinder. At the same time, after the discharge pipe continues to rotate 90 degrees, the baffle assembly is opened by the arc-shaped protrusion, realizing the discharge of the grains. In this way, when the grains are fed for the second time, the grains in the drying cylinder can be emptied, so as not to cause excessive grains in the drying cylinder.

[0041] In this embodiment, in order to enable the grains to quickly pass through the drying cylinder in the later stage of drying and reduce the contact time between the grains and the far-infrared tubes, electric cylinders 10 are symmetrically and fixedly connected to the opposite sides of the top of the box body 31. The four driven gears 43 are connected by a connecting plate 11, and the driven gears 43 are slidably connected to the second rotating shaft 41. The telescopic ends of the electric cylinders 10 are connected to the connecting plate 11. Fixed blocks 74 are symmetrically and rotatably connected to the opposite sides of the outer wall of the rotating cylinder 72. The telescopic ends of the electric cylinders 10 pass through the connecting plate 11 and are connected to the fixed blocks 74. The rotating cylinder 72 is provided with a through hole that cooperates with the first connecting rod 71. When the electric cylinder 10 drives the rotating cylinder 72 to descend so that the arc-shaped protrusion 73 at the top is in contact with the abutting block 69, the driven gear 43 is synchronously driven to descend and is not engaged with the second intermediate gear 38. In the later stage of drying, the electric cylinder is started, and the electric cylinder drives the connecting plate and the rotating cylinder to descend synchronously, so that the heights of the driven gear and the rotating cylinder are reduced at the same time. During the later drying process, the second intermediate gear will not drive the driven gear to rotate, neither will it cause the grains in the drying cylinder to be conveyed up and down, nor will it cause the grains to accumulate in the drying cylinder (the descent of the driven gear can also avoid the situation where the second intermediate gear has engaged with the driven gear when the discharge time of the grains is long, that is, the grains have not been completely emptied).

[0042] The specific working process of this embodiment is as follows:

[0043] When drying the grains, the grains are put into the grain bin 1, and then the far-infrared tubes 5, the drive motor 32 and the high-pressure induced draft fan are started respectively;

[0044] The driving motor 32 rotates to drive the first rotating shaft 24 to rotate, thereby driving the first spiral blade 25 to rotate. Thus, the grains at the bottom of the grain bin 1 are conveyed upward by the first spiral blade 25 and gradually discharged through the discharge pipe 23. Then, the first incomplete gear 33 on the outer wall of the first rotating shaft 24 meshes with the first intermediate gear 35, thereby driving the internal gear ring 34, the second connecting rod 36, and the upper cylinder body 22 to rotate by a certain angle through the first intermediate gear 35, and rotating the discharge pipe 23 to a set of drying cylinders 4 (hereinafter referred to as the first drying cylinder for convenience of principle description). Then, the first incomplete gear 33 is separated from the first intermediate gear 35, and the discharge pipe 23 stops rotating, while the first spiral blade 25 continues to rotate and continuously conveys the grains into the first drying cylinder. And the grains are conveyed downward along the second spiral blade 42 and are fully irradiated by far-infrared light during the conveying process for drying. Then, the first incomplete gear 33 is separated from the first intermediate gear 35 again, causing the discharge pipe 23 to rotate to the next set of drying cylinders 4 (hereinafter referred to as the second drying cylinder) for discharging, and the arrangement of the feed hopper 8 can prevent grain leakage during the rotation of the discharge pipe 23; at the same time, when the discharge pipe 23 rotates to the second drying cylinder, the second intermediate gear 38 synchronously rotates to the position of the first drying cylinder and meshes with the driven gear 43 on the first drying cylinder, thereby driving the second intermediate gear 38 and the driven gear 43 to rotate intermittently through the second incomplete gear 37, causing the second rotating shaft 41 and the second spiral blade 42 to rotate intermittently, thereby intermittently lifting the grains in the first drying cylinder upward, and after the second incomplete gear 37 is separated from the second intermediate gear 38, the grains fall again along the second spiral blade 42 under the action of gravity. This process is repeated to allow the far-infrared light to fully irradiate the grains, improving the drying efficiency.

[0045] When the first incomplete gear 33 meshes with the first intermediate gear 35 again, it drives the discharge pipe 23 to rotate to the next set of drying cylinders 4 (hereinafter referred to as the third drying cylinder). At this time, the second intermediate gear 38 meshes with the driven gear 43 on the second drying cylinder, so as to repeatedly lift the grains in the second drying cylinder. At the same time, the rotation of the upper cylinder 22 can synchronously drive the rotation of the rotating cylinder 72. When the second intermediate gear 38 meshes with the driven gear 43 on the second drying cylinder, the arc-shaped protrusion 73 on the outer wall of the rotating cylinder 72 contacts the baffle assembly 6 on the first drying cylinder and opens the baffle assembly 6 on the first drying cylinder for discharging. The specific process is as follows: The arc-shaped protrusion 73 rotates with the rotating cylinder 72 and gradually contacts the abutting block 69 on the first drying cylinder, thereby pushing the abutting block 69, the sliding strip 67 and the rack 68 to slide. The two rotating gears 66 and the mounting shaft 63 are synchronously driven by the rack 68 to rotate, so that the two semi-circular baffles 65 rotate synchronously, and then the bottom discharge port of the first drying cylinder is opened, so that the grains can fall into the grain bin 1. Then, when the second intermediate gear 38 meshes with the driven gear 43 on the third drying cylinder, the arc-shaped protrusion 73 disengages from the contact with the baffle assembly 6 on the first drying cylinder, so that the abutting block 69, the sliding strip 67 and the rack 68 return to their original positions under the restoring force of the spring 610, so that the two semi-circular baffles 65 rotate and fit together, and then the discharge port at the bottom of the first drying cylinder is closed. Then, the arc-shaped protrusion 73 contacts the baffle assembly 6 on the second drying cylinder to discharge the second drying cylinder, and so on to dry the grains reciprocally.

[0046] During the drying process, the high-pressure induced draft fan creates a negative pressure in the grain bin 1 to discharge the moisture from the grain bin 1, and the humidity sensor on the exhaust pipe 9 detects the humidity of the discharged air to judge the drying effect of the grains in the grain bin 1.

[0047] And as the drying progresses, by starting the electric cylinder 10, the electric cylinder 10 pushes the connecting plate 11 and the fixing block 74 to descend, so that the driven gear 43 descends along the second rotating shaft 41 (a limiting groove is provided on the outer wall of the second rotating shaft 41, a limiting key is provided on the inner ring of the driven gear 43, and the driven gear 43 is connected to the connecting plate 11 through a rotating bearing). At the same time, the rotating cylinder 72 descends, and the arc-shaped protrusions 73 with different arc lengths descend to the position where they contact the abutting block 69, so that the baffle assembly 6 at the bottom of each drying cylinder 4 can be opened earlier, reducing the residence time of the grains in the drying cylinder 4. At the same time, in the later stage of drying, the driven gear 43 descends to the lowest position (that is, it will not mesh with the second intermediate gear 38. Before reaching the lowest position, the driven gear 43 can still remain meshed with the second intermediate gear 38), and the rotating cylinder 72 descends to make the annular arc-shaped protrusion 73 contact the abutting block 69, so that the four groups of baffle assemblies 6 can be in an open state, enabling the grains to quickly pass through the drying cylinder 4.

[0048] When the moisture sensor detects that the total moisture content of the air in the exhaust pipe 9 is about 14%, turn off the far-infrared tube 5, increase the power of the high-pressure induced draft fan and open the feed inlet of the grain bin 1 for tempering, continue ventilation and drying, and cool the surface temperature of the grain to the ambient temperature to complete the drying of the grain.

[0049] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An efficient grain dryer with uniform drying, characterized by: The invention comprises a grain bin (1) having a conical bottom cross-section, a spiral elevator (2) being installed at the top of the inner cavity of the grain bin (1), and a distance being provided between the spiral elevator (2) and the bottom of the inner cavity of the grain bin (1), the spiral elevator (2) comprising a lower cylinder (21) and an upper cylinder (22) which are rotatably connected to each other, a discharge pipe (23) being connected to the side wall of the upper cylinder (22), a first rotating shaft (24) being rotatably connected to the top of the inner cavity of the upper cylinder (22), and a first spiral blade (25) being provided on the outer wall of the first rotating shaft (24), the first rotating shaft (24) and the first spiral blade (25) both passing through the bottom of the lower cylinder (21), a driving mechanism (3) being installed at the top of the grain bin (1), the driving mechanism (3) being connected to the first rotating shaft (24) and the upper cylinder (22) respectively, and The driving mechanism (3) drives the first rotating shaft (24) to rotate continuously and drives the upper cylinder (22) to rotate intermittently by 90 degrees. The inner cavity of the grain silo (1) is provided with four drying cylinders (4) surrounding the spiral elevator (2) at equal angles, and the feed port of the drying cylinder (4) is located below the discharge pipe (23). The top of the inner cavity of the grain silo (1) is provided with a plurality of far-infrared tubes (5) correspondingly inserted into the inner cavity of each drying cylinder (4). The bottom of the drying cylinder (4) is provided with an openable baffle assembly (6). The outer wall of the lower cylinder (21) is provided with an abutment member (7) that rotates with the upper cylinder (22), and when the abutment member (7) contacts the baffle assembly (6), the abutment member (7) pushes the baffle assembly (6) to open. The discharge pipe (23) and the abutment member (7) are respectively located on opposite sides of the spiral elevator (2); The baffle assembly (6) comprises a fixing ring (61) mounted on the bottom of the drying cylinder (4); a mounting seat (62) with a hollow interior is mounted on the side wall of the fixing ring (61); a mounting shaft (63) is symmetrically rotatably connected to two opposite sides of the inner cavity of the mounting seat (62); a connecting strip (64) is fixedly connected to the outer wall of the mounting shaft (63); one end of each of the two connecting strips (64) passes through the side wall of the mounting seat (62) and is mounted with mutually matching semicircular baffles (65); the top of the semicircular baffle (65) abuts against the bottom of the fixing ring (61) and seals the bottom of the drying cylinder (4); the outer wall of the mounting shaft (63) is fixedly connected to a rotating gear (66), and the rotating gear (66) is fixedly connected to the outer wall of the mounting shaft (63). The gear (66) is located below the semicircular baffle (65); one end of the mounting seat (62) away from the fixed ring (61) is penetrated by a sliding bar (67) for sliding connection; two opposite side walls of one end of the sliding bar (67) inserted into the inner cavity of the mounting seat (62) are respectively provided with racks (68) that cooperate with the two rotating gears (66); one end of the sliding bar (67) located outside the mounting seat (62) is fixedly connected with an abutment block (69), and one end of the abutment block (69) is provided with an inclined first inclined surface; the outer wall of the sliding bar (67) is sleeved with a spring (610), and the spring (610) is located between the abutment block (69) and the mounting seat (62).

2. The high-efficiency grain dryer with uniform drying according to claim 1, characterized in that: A feed hopper (8) is installed at the top of the feed opening of each of the four drying cylinders (4), and the four feed hoppers (8) are connected to each other in sequence and are respectively connected to the inner wall of the grain bin (1), and an inclined third slope is provided at the connecting portion of the four feed hoppers (8).

3. The high-efficiency grain dryer with uniform drying according to claim 2, characterized in that: The side wall of the grain bin (1) is connected to an exhaust pipe (9), and the exhaust pipe (9) is located below the feed hopper (8). A high-pressure induced draft fan and a humidity sensor are provided on the exhaust pipe (9).

4. The high-efficiency grain dryer with uniform drying according to claim 1, characterized in that: The abutment member (7) comprises a first connecting rod (71) having one end fixed to the outer wall of the upper cylinder (22) and a rotating cylinder (72) sleeved on the outer wall of the lower cylinder (21); the first connecting rod (71) is connected to the rotating cylinder (72); the outer wall of the rotating cylinder (72) is provided with an arc-shaped protrusion (73) which cooperates with the abutment block (69); the arc-shaped protrusion (73) is arranged opposite to the discharge pipe (23); the end of the arc-shaped protrusion (73) which first contacts the abutment block (69) is provided with a second inclined surface which cooperates with the first inclined surface.

5. The high-efficiency grain dryer with uniform drying according to claim 4, characterized in that: The outer wall of the rotating cylinder (72) is provided with a plurality of arc-shaped protrusions (73) at intervals along the height direction, and the arc length of each layer of the arc-shaped protrusions (73) gradually increases. The arc-shaped protrusions (73) located at the top are circular, and the top and bottom of each layer of the arc-shaped protrusions (73) are provided with fifth inclined surfaces, and the top and bottom of the abutment block (69) are provided with fourth inclined surfaces.

6. The high-efficiency grain dryer with uniform drying according to claim 4, characterized in that: The driving mechanism (3) comprises a box body (31) mounted on the top of the grain bin (1); a driving motor (32) is fixedly connected to the top of the box body (31); an output end of the driving motor (32) is fixedly connected to the top of a first rotating shaft (24); a first incomplete gear (33) is sleeved on the outer wall of the first rotating shaft (24); an inner gear ring (34) and a first transition gear (35) are rotatably connected to the top of the box body (31); the first incomplete gear (33) and the inner gear ring (34) are both meshedly connected to the first transition gear (35); a second connecting rod (36) is installed at an equal angle on the bottom of the inner gear ring (34); and the second connecting rod (36) is fixedly connected to the top side wall of the upper cylinder (22).

7. The high-efficiency grain dryer with uniform drying according to claim 6, characterized in that: The top of the inner cavity of the grain bin (1) is rotatably connected to a second rotating shaft (41) sleeved on the outside of the far-infrared tube (5); the outer wall of the second rotating shaft (41) is fixedly connected to a second spiral blade (42); the outer wall of the second rotating shaft (41) is sleeved with a driven gear (43); the outer wall of the first rotating shaft (24) is fixedly connected to a second incomplete gear (37); the outer wall of a second connecting rod (36) is rotatably connected to a second transition gear (38); and the second transition gear (38) is meshed and connected with one of the four groups of driven gears (43) in sequence.

8. The high-efficiency grain dryer with uniform drying according to claim 7, characterized in that: The second transition gear (38) is arranged between the discharge pipe (23) and the arc-shaped protrusion (73), and after the discharge pipe (23) rotates 90 degrees, the second transition gear (38) meshes with a set of driven gears (43).

9. The high-efficiency grain dryer with uniform drying according to claim 7, characterized in that: An electric cylinder (10) is symmetrically fixedly connected to opposite sides of the top of the box body (31); the four driven gears (43) are connected to each other via a connecting plate (11), and the driven gear (43) is slidably connected to the second rotating shaft (41); the telescopic end of the electric cylinder (10) is connected to the connecting plate (11); the outer wall of the rotating cylinder (72) is symmetrically rotatably connected to fixed blocks (74) on opposite sides; the telescopic end of the electric cylinder (10) passes through the connecting plate (11) and is connected to the fixed block (74); a through hole is opened through the rotating cylinder (72) and cooperates with the first connecting rod (71); when the electric cylinder (10) drives the rotating cylinder (72) to descend so that the arc-shaped protrusion (73) located at the top abuts against the abutment block (69), the driven gear (43) is synchronously driven to descend and does not mesh with the second transition gear (38).

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