Efficient grain drying machine uniform in drying

Abstract

The invention relates to the technical field of drying machines, in particular to a uniform-drying efficient grain drying machine which comprises a grain bin, a spiral lifter is mounted at the top of an inner cavity of the grain bin, a driving mechanism is mounted at the top of the grain bin and connected with a first rotating shaft and an upper barrel, and a drying barrel is arranged in the inner cavity of the grain bin. According to the grain drying machine, when grains are dried, the grains at the bottom of the grain bin are continuously conveyed upwards through the spiral lifters, then the grains are sequentially fed into the four drying barrels through the discharging pipes, when one drying barrel is fed, the grains are conveyed to the bottom of the grain bin through the discharging pipes, and therefore the grain drying efficiency is greatly improved. The baffle assembly at the bottom of the drying barrel is in a closed state, so that grains can be kept in the drying barrel for a period of time, the far infrared tube in the drying barrel can efficiently irradiate and dry the grains, meanwhile, the grains are temporarily stored in the drying barrel, the grains at the bottom of the grain bin can be conveyed upwards as much as possible, and grain accumulation is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of dryers, in particular to a high-efficiency grain dryer capable of drying evenly. Background Art

[0002] When drying grains, the existing grain drying bin uses a spiral elevator to transport the grains at the bottom of the grain bin upward and then put them into the grain bin, and uses countercurrent hot air to dry the grains at the same time. However, this drying device has a short contact time between the grains and the hot air due to the fast falling speed of the grains during drying, resulting in an unsatisfactory drying effect. At the same time, the lifted grains quickly fall into the grain bin, resulting in a large amount of grains piled up at the bottom of the grain bin, and moisture cannot be discharged well. To this end, the present invention has developed an efficient grain dryer that dries evenly to solve the above problems. Summary of the invention

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

[0004] To achieve the above purpose, the technical solution provided by the present invention is: A high-efficiency grain dryer for uniform drying comprises a grain silo with a conical bottom cross-section, a spiral elevator is installed on the top of the inner cavity of the grain silo, and a distance is provided between the spiral elevator and the bottom of the inner cavity of the grain silo, the spiral elevator comprises a lower cylinder and an upper cylinder connected to each other in rotation, the side wall of the upper cylinder is connected to a discharge pipe, the top of the inner cavity of the upper cylinder is connected to a first rotating shaft in rotation, and the outer wall of the first rotating shaft is provided with a first spiral blade, the first rotating shaft and the first spiral blade both pass through the bottom of the lower cylinder, and a driving mechanism is installed on the top of the grain silo, and the driving mechanism is respectively connected to the first rotating shaft and the upper cylinder. The grain silo is connected to each other, and the driving mechanism drives the first rotating shaft to rotate continuously while driving the upper cylinder to rotate intermittently by 90 degrees. The inner cavity of the grain silo is provided with four drying cylinders which surround the spiral elevator at equal angles, and the feed port of the drying cylinder is located below the discharge pipe. A plurality of far-infrared tubes which are correspondingly inserted into the inner cavity of each drying cylinder are installed on the top of the inner cavity of the grain silo. An openable baffle assembly is provided at the bottom of the drying cylinder. An abutment which rotates with the upper cylinder is provided on the outer wall of the lower cylinder, and when the abutment contacts the baffle assembly, the abutment pushes the baffle assembly to open, and the discharge pipe and the abutment are respectively located on the opposite sides of the spiral elevator.

[0005] Preferably, a feed hopper is installed on the top of the feed port of the four drying cylinders, and the four feed hoppers are connected to each other in sequence and are respectively connected to the inner wall of the grain silo, and the parts where the four feed hoppers are connected are provided with an inclined third slope.

[0006] Preferably, the side wall of the grain silo is connected to an exhaust pipe, and the exhaust pipe is located below the feed hopper, and the exhaust pipe is provided with a high-pressure induced draft fan and a humidity sensor.

[0007] The top of the semicircular baffle plate abuts against the bottom of the fixing ring and seals the bottom of the drying cylinder, and the outer wall of the semicircular baffle plate is fixed with a rotating gear, and the rotating gear is located under the semicircular baffle plate, and the mounting seat is away from the fixing ring. The end of the mounting seat away from the fixing ring passes through a sliding bar and is slidably connected to the two rotating gears. The opposite side walls of the sliding bar at one end of the end inserted into the inner cavity of the mounting seat are respectively provided with racks that cooperate with the two rotating gears. The end of the sliding bar located outside the mounting seat is fixedly connected with an abutting block, and one end of the abutting block is provided with an inclined first inclined surface, and the outer wall of the sliding bar is sleeved with a spring, and the spring is located between the abutting block and the mounting seat.

[0008] Preferably, the abutment member includes a first connecting rod fixed at one end to the outer wall of the upper cylinder and a rotating cylinder sleeved on the outer wall of the lower cylinder, the first connecting rod is connected to the rotating cylinder, the outer wall of the rotating cylinder is provided with an arc-shaped protrusion that cooperates with the abutment block, and the arc-shaped protrusion is arranged opposite to the discharge pipe, and the end of the arc-shaped protrusion that first contacts the abutment block is provided with a second inclined surface that cooperates with the first inclined surface.

[0009] Preferably, the outer wall of the rotating cylinder is provided with a plurality of arc-shaped protrusions at intervals along the height direction, and the arc length of each layer of the arc-shaped protrusions gradually increases, the arc-shaped protrusions located at the top are circular, and the top and bottom of each layer of the arc-shaped protrusions are provided with a third inclined surface, and the top and bottom of the abutment block are provided with a fourth inclined surface.

[0010] Preferably, the driving mechanism includes a box body installed on the top of the grain silo, 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, the outer wall of the first rotating shaft is sleeved with a first incomplete gear, the top of the box body is rotatably connected with an inner gear ring and a first transition gear, the first incomplete gear and the inner gear ring are both meshed with the first transition gear, a second connecting rod is installed at an equal angle on the bottom of the inner gear ring, and the second connecting rod is fixedly connected to the top side wall of the upper cylinder.

[0011] Preferably, the top of the inner cavity of the grain silo is rotatably connected to a second rotating shaft sleeved on the outside of the far-infrared tube, the outer wall of the second rotating shaft is fixedly connected to a second spiral blade, the outer wall of the second rotating shaft is sleeved with a driven gear, the outer wall of the first rotating shaft is fixedly connected to a second incomplete gear, a second connecting rod is rotatably connected to the outer wall thereof, and the second transition gear is meshed and connected with one group of the four groups of driven gears in sequence.

[0012] Preferably, the second transition gear is arranged between the discharge pipe and the arc-shaped protrusion, and after the discharge pipe rotates 90 degrees, the second transition gear meshes with a set of driven gears.

[0013] Preferably, electric cylinders are symmetrically fixed on two opposite sides of the top of the box body, the four driven gears are connected by a connecting plate, and the driven gears are slidably connected to the second rotating shaft, the telescopic ends of the electric cylinders are connected to the connecting plates, and fixed blocks are symmetrically rotatably connected on two opposite sides of the outer wall of the rotating cylinder, the telescopic ends of the electric cylinders pass through the connecting plates and are connected to the fixed blocks, and a through hole that cooperates with the first connecting rod is opened through the rotating cylinder, and when the electric cylinder drives the rotating cylinder to descend so that the arc-shaped protrusion at the top abuts against the abutment block, the driven gears are synchronously driven to descend and do not mesh with the second transition gear.

[0014] Compared with the prior art, the present invention has the following beneficial effects: When the dryer of the present invention dries the grains, the grains at the bottom of the grain bin are continuously transported upwards by a spiral elevator, and then are put into four drying drums in sequence through a discharge pipe, and when one drying drum is put into, the baffle assembly at the bottom of the drying drum is in a closed state, so that the grains can be retained in the drying drum for a period of time, so that the far-infrared tube in the drying drum can efficiently irradiate and dry the grains, and at the same time, the temporary storage of the grains in the drying drum can also enable the grains at the bottom of the grain bin to be transported upwards as much as possible, avoiding grain accumulation, and then when the discharge pipe rotates to above the drying drum of the lower group again, it can drive the abutment block to abut against the cover assembly on the upper group of drying drums and open the cover assembly, so that the grains in the drying drum are discharged for circulation, thereby realizing the cyclic drying of the grains and increasing the contact time between the grains and the far-infrared tubes, thereby improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the grain dryer of the present invention; Figure 2 It is a partial front cross-sectional structural schematic diagram of the grain dryer of the present invention; Figure 3 It is a structural schematic diagram of a grain bin in a grain dryer of the present invention after the bin body is removed; Figure 4 for Figure 3 Schematic diagram of the cross-section structure; Figure 5 It is a structural schematic diagram of a spiral feeder and its connecting parts in a grain dryer of the present invention; Figure 6 It is a structural schematic diagram of a baffle assembly in a grain dryer of the present invention; Figure 7 It is a schematic diagram of a partial top-sectional structure of a baffle assembly in a grain dryer of the present invention; Figure 8 It is a structural schematic diagram of the driving mechanism in the grain dryer of the present invention; Fig. 9 for Figure 8 Schematic diagram of the cross-section structure.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Grain silo; 2. Screw lifter; 21. Lower cylinder; 22. Upper cylinder; 23. Discharge pipe; 24. First rotating shaft; 25. First spiral blade; 3. Driving mechanism; 31. Box; 32. Driving motor; 33. First incomplete gear; 34. Internal gear ring; 35. First transition gear; 36. Second connecting rod; 37. Second incomplete gear; 38. Second transition 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 bar; 65. Semicircular baffle; 66. Rotating gear; 67. Sliding bar; 68. Rack; 69. Abutment block; 610. Spring; 7. Abutment 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 DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1-9 As shown: One embodiment of the present invention is: A high-efficiency grain dryer for uniform drying comprises a grain silo 1 having a conical bottom cross section, a spiral elevator 2 is installed on the top of the inner cavity of the grain silo 1, and a distance is provided between the spiral elevator 2 and the bottom of the inner cavity of the grain silo 1, the spiral elevator 2 comprises a lower cylinder 21 and an upper cylinder 22 rotatably connected to each other, a discharge pipe 23 is connected to the side wall of the upper cylinder 22, a first rotating shaft 24 is rotatably connected to the top of the inner cavity of the upper cylinder 22, and a first spiral blade 25 is provided on the outer wall of the first rotating shaft 24, the first rotating shaft 24 and the first spiral blade 25 both pass through the bottom of the lower cylinder 21, a driving mechanism 3 is installed on the top of the grain silo 1, and the driving mechanism 3 is respectively connected to the first rotating shaft 24 and the upper cylinder 2 2 is connected, and the driving mechanism 3 drives the first rotating shaft 24 to rotate continuously while driving the upper cylinder 22 to rotate intermittently 90 degrees. The inner cavity of the grain silo 1 is provided with four drying cylinders 4 which surround the spiral elevator 2 at equal angles, and the feeding port of the drying cylinder 4 is located below the discharge pipe 23. A plurality of far-infrared tubes 5 which are correspondingly inserted into the inner cavity of each drying cylinder 4 are installed on the top of the inner cavity of the grain silo 1. An openable baffle assembly 6 is arranged at the bottom of the drying cylinder 4. An abutment 7 which rotates with the upper cylinder 22 is arranged on the outer wall of the lower cylinder 21, and when the abutment 7 contacts with the baffle assembly 6, the abutment 7 pushes the baffle assembly 6 to open, and the discharge pipe 23 and the abutment 7 are respectively located on the opposite sides of the spiral elevator 2.

[0020] In this embodiment, in order to allow the grains to fall into the drying drum during the rotation of the discharge port, a feed hopper 8 is installed on the top of the feed port of the four drying drums 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 the parts where the four feed hoppers 8 are connected are provided with an inclined third slope, and the four feed hoppers are connected to each other to form a closed structure, so that when the discharge pipe rotates, the grains discharged from the discharge pipe can all fall into the drying drum without causing the grains to fall directly to the bottom of the grain bin, and the third slope can prevent the grains from piling up at the connection (such as Figure 3 shown, and Figure 3 The feed hopper in the figure is only a schematic diagram and its shape can be conical or funnel-shaped).

[0021] In this embodiment, in order to accurately judge the drying effect of the grain in the grain silo, the side wall of the grain silo 1 is connected to an exhaust pipe 9, and the exhaust pipe 9 is located below the feed hopper 8. The exhaust pipe 9 is provided with a high-pressure induced draft fan and a humidity sensor. The exhaust pipe is arranged below the feed hopper. The humidity of the grain after drying from the drying drum and the grain at the bottom of the grain silo can be accurately detected, so that the power of the far-infrared tube can be adjusted, and the high-pressure induced draft fan can accelerate the air circulation in the grain silo, and a number of ventilation holes are opened on the outer wall of the drying drum.

[0022] In this embodiment, in order to realize that the baffle assembly can be automatically opened under the push of the abutment, and the baffle assembly can be automatically closed after the abutment is separated from the baffle assembly, the structures of the baffle assembly and the abutment are as follows: The baffle assembly 6 includes a fixed ring 61 installed at the bottom of the drying cylinder 4, and a hollow mounting seat 62 is installed on the side wall of the fixed ring 61. The mounting seat 62 has a mounting shaft 63 that is symmetrically rotatably connected to the two sides of the inner cavity of the mounting seat 62. The outer wall of the mounting shaft 63 is fixedly connected to a connecting strip 64. One end of the two connecting strips 64 passes through the side wall of the mounting seat 62 and is installed with a semicircular baffle 65 that cooperates with each other. The top of the semicircular baffle 65 abuts against the bottom of the fixed 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 The wheel 66 is located below the semicircular baffle 65, and a sliding bar 67 is slidably connected to the end of the mounting seat 62 away from the fixed ring 61. The opposite side walls of the 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. An end of the sliding bar 67 located outside the mounting seat 62 is fixedly connected to an abutment block 69, and an inclined first slope is provided at one end of the abutment block 69. A spring 610 is sleeved on the outer wall of the sliding bar 67, and the spring 610 is located between the abutment block 69 and the mounting seat 62.

[0023] The abutment member 7 includes a first connecting rod 71 fixed at one end 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 that cooperates with the abutment block 69, and the arc-shaped protrusion 73 is arranged opposite to the discharge pipe 23. The end of the arc-shaped protrusion 73 that first contacts the abutment block 69 is provided with a second inclined surface that cooperates with the first inclined surface. The rotation of the upper cylinder can synchronously drive the rotating cylinder to rotate through the first connecting rod, so that the arc-shaped protrusion on the outer wall of the rotating cylinder can contact the abutment blocks on the four baffle assemblies in turn, thereby realizing the dependence of the four baffle assemblies. The first and second inclined surfaces are provided to make the contact between the arc-shaped protrusion and the abutment block smoother, and the side wall of the mounting seat is provided with an opening for the connecting block to rotate.

[0024] In the present embodiment, in order to reduce the residence time of grains in the drying drum 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 drum 72, and the arc length of the arc-shaped protrusions 73 of each layer gradually increases. The arc-shaped protrusions 73 at the top are in the form of a circular ring, and the top and bottom of each layer of arc-shaped protrusions 73 are provided with a third inclined surface, and the top and bottom of the abutment block 69 are provided with a fourth inclined surface. In each different period of drying, the height of the rotating drum gradually decreases, so that the arc-shaped protrusions of different heights contact the abutment block, and the arc length of each layer of arc-shaped protrusions gradually increases, so that the arc-shaped protrusions can contact the abutment block earlier when the rotating drum rotates, thereby opening the baffle assembly earlier and allowing the grains in the drying drum to be discharged faster. The arc-shaped protrusions of the last layer are in the form of a circular ring, which can enable the four baffle assemblies to be in the open state at the same time, so that the grains can pass through the drying drum at the fastest speed to avoid excessive drying of the grains.

[0025] In this embodiment, in order to achieve uninterrupted upward transportation of grains while making the discharge pipe 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, the outer wall of the first rotating shaft 24 is sleeved with a first incomplete gear 33, the top of the box body 31 is rotatably connected with an inner gear ring 34 and a first transition gear 35, the first incomplete gear 33 and the inner gear ring 34 are both meshed with the first transition gear 35, a second connecting rod 36 is equiangularly installed at 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, wherein the driving motor can always drive the first rotating shaft and the first spiral blade to rotate, thereby achieving uninterrupted feeding, and at the same time, the first incomplete gear is intermittently meshed with the first transition gear, so that the inner gear ring is driven to intermittently rotate at the same angle, and then the upper cylinder is driven to rotate through the second connecting rod, thereby achieving uninterrupted feeding while the discharge pipe rotates intermittently and at equal angles.

[0026] In this embodiment, in order to further improve the drying efficiency of the grain in the drying cylinder, a second rotating shaft 41 sleeved on the outside of the far-infrared tube 5 is rotatably connected to the top of the inner cavity of the grain silo 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, a second incomplete gear 37 is fixedly connected to the outer wall of the first rotating shaft 24, a second connecting rod 36 is rotatably connected to the outer wall of the second transition gear 38, and the second transition gear 38 is meshed with one group of the four groups of driven gears 43 in turn, wherein after the grain falls into a drying cylinder, when the discharge pipe rotates to the next drying cylinder, it can drive the second transition gear to rotate to the second rotating shaft position corresponding to the drying cylinder containing the grain and mesh with the driven gear, so that the second incomplete gear intermittently drives the second transition gear and the driven gear to rotate, so that the second rotating shaft and the second spiral blade can rotate intermittently, so that the grain in the drying cylinder can be lifted first and then fall, and this reciprocating process can achieve full contact between the grain and the far-infrared tube, thereby improving the drying efficiency.

[0027] In this embodiment, in order to prevent excessive accumulation of grains in the drying drum, 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 engages with a group of driven gears 43, so that after a group of drying drums are loaded, the second transition gear can drive the second spiral blade of the drying drum to rotate, thereby realizing the reciprocating up and down movement of the grains in the drying drum. At the same time, as the discharge pipe continues to rotate 90 degrees, the baffle assembly is opened through the arc-shaped protrusion to realize the discharge of the grains. In this way, when the grains are discharged for the second time, the grains in the drying drum can be emptied, thereby preventing excessive grains from entering the drying drum.

[0028] In this embodiment, in order to enable the grains to pass through the drying cylinder quickly in the later stage of drying and reduce the contact time between the grains and the far-infrared tubes, electric cylinders 10 are symmetrically fixed on the two opposite sides of the top of the box body 31, and the four driven gears 43 are connected by 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, and the outer wall of the rotating cylinder 72 is symmetrically rotatably connected with fixed blocks 74 on both sides, the telescopic end of the electric cylinder 10 passes through the connecting plate 11 and is connected to the fixed block 74, and the rotating cylinder 72 is penetrated with a through hole that cooperates with the first connecting rod 71, and the electric cylinder 10 drives the rotating cylinder 72 to rotate. When the moving cylinder 72 descends so that the arc-shaped protrusion 73 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. In the later stage of drying, the electric cylinder is started, and the electric cylinder synchronously connects the connecting plate and the rotating cylinder to descend, so that the heights of the driven gear and the rotating cylinder are reduced at the same time, so that in the later stage of drying, the second transition gear will not drive the driven gear to rotate, and the grain in the drying cylinder will not be transported up and down, nor will the grain be accumulated in the drying cylinder (the descent of the driven gear can also avoid the situation where the discharge time of the grain is long, that is, it has not been completely emptied, and the second transition gear has been meshed with the driven gear at this time).

[0029] The specific working process of this embodiment is as follows: When drying grains, the grains are put into the grain bin 1, and then the far infrared tube 5, the driving motor 32 and the high pressure induced draft fan are started respectively; The driving motor 32 rotates to drive the first rotating shaft 24 to rotate, thereby driving the first spiral blade 25 to rotate, so that the grains at the bottom of the grain bin 1 are transported upward through the first spiral blade 25 and gradually discharged from the discharge pipe 23, and then the first incomplete gear 33 on the outer wall of the first rotating shaft 24 is meshed with the first transition gear 35, so that the inner gear ring 34, the second connecting rod 36 and the upper cylinder 22 are driven by the first transition gear 35 to rotate a certain angle, and the discharge pipe 23 is rotated to a group of drying cylinders 4 (hereinafter referred to as the first drying cylinder for the convenience of describing the principle), and then the first incomplete gear 33 is separated from the first transition gear 35, the discharge pipe 23 stops rotating, and the first spiral blade 25 continues to rotate to continuously transport the grains into the first drying cylinder, and the grains are transported downward along the second spiral blade 42, and are fully irradiated and dried by far-infrared light during the transportation process, and then the first incomplete gear 3 3 and then separated from the first transition gear 35, so that the discharge pipe 23 rotates to the next group of drying cylinders 4 (hereinafter referred to as the second drying cylinder) and discharges the materials, and the setting of the feed hopper 8 can prevent the grains from leaking 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 transition gear 38 synchronously rotates to the position of the first drying cylinder, and meshes with the driven gear 43 on the first drying cylinder, so that the second transition gear 38 and the driven gear 43 are driven to rotate intermittently through the second incomplete gear 37, so that the second rotating shaft 41 and the second spiral blade 42 rotate intermittently, so that the grains in the first drying cylinder are intermittently lifted upward, and after the second incomplete gear 37 is separated from the second transition gear 38, the grains fall along the second spiral blade 42 again under the action of gravity, and the far-infrared light is fully irradiated on the grains in this reciprocating manner, thereby improving the drying efficiency.

[0030] When the first incomplete gear 33 meshes with the first transition gear 35 again, it drives the discharge pipe 23 to rotate to the next group of drying cylinders 4 (hereinafter referred to as the third drying cylinder), and at this time the second transition 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 rotating cylinder 72 to rotate, and when the second transition 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 unloading; the specific process is as follows: the arc-shaped protrusion 73 rotates with the rotating cylinder 72 and gradually contacts the abutment block 69 on the first drying cylinder, thereby pushing the abutment block 69 and the sliding bar 67 and the rack 68 slide, and the rack 68 synchronously drives the two rotating gears 66 and the mounting shaft 63 to rotate, so that the two semicircular baffles 65 rotate synchronously, and then open the bottom discharge port of the first drying cylinder, so that the grain can fall into the grain bin 1, and then as the second transition gear 38 engages 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 abutment block 69, the sliding bar 67 and the rack 68 return to their original positions under the action of the restoring force of the spring 610, so that the two semicircular baffles 65 rotate and fit each other, and then close the discharge port at the bottom of the first drying cylinder, and then the arc-shaped protrusion 73 contacts the baffle assembly 6 on the second drying cylinder again, and the second drying cylinder is unloaded, and the grain drying is carried out in this reciprocating manner.

[0031] During the drying process, the high-pressure induced draft fan generates negative pressure in the grain bin 1 to discharge moisture from the grain bin 1, and the humidity sensor on the exhaust pipe 9 detects the humidity of the exhaust air to determine the drying effect of the grain in the grain bin 1; As the drying progresses, the electric cylinder 10 is started, which pushes the connecting plate 11 and the fixing block 74 downward, so that the driven gear 43 is lowered 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), and at the same time, the rotating drum 72 is lowered, and the arc-shaped protrusions 73 of different arc lengths are lowered to a position in contact with the abutment block 69, so that the bottom of each drying drum 4 The baffle assembly 6 in the upper part can be opened earlier to reduce the retention time of grains in the drying cylinder 4. At the same time, in the later stage of drying, the driven gear 43 is dropped to the lowest position (that is, it will not mesh with the second transition gear 38. When it has not reached the lowest position, the driven gear 43 can still maintain meshing with the second transition gear 38), and the rotating cylinder 72 is dropped to make the annular arc protrusion 73 contact with the abutment block 69, so that the four groups of baffle assemblies 6 can be in an open state, so that the grains can pass through the drying cylinder 4 quickly.

[0032] When the humidity sensor detects that the total moisture value of the air in the exhaust pipe 9 is about 14%, the far-infrared tube 5 is closed, the high-pressure induced draft fan increases its power and the feed port of the grain bin 1 is opened for slow revival, and ventilation and drying are continued. The surface temperature of the grain is cooled to the ambient temperature, and the drying of the grain is completed.

[0033] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which 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).

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 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).

5. The high-efficiency grain dryer with uniform drying according to claim 4, 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.

6. The high-efficiency grain dryer with uniform drying according to claim 5, 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 a third inclined surface, and the top and bottom of the abutment block (69) are provided with a fourth inclined surface.

7. The high-efficiency grain dryer with uniform drying according to claim 5, 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).

8. The high-efficiency grain dryer with uniform drying according to claim 7, 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.

9. The high-efficiency grain dryer with uniform drying according to claim 8, 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).

10. The high-efficiency grain dryer with uniform drying according to claim 8, 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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