CN120351730A - Grain drier - Google Patents

Abstract

The invention discloses a grain dryer, the technical scheme of which mainly comprises a drying box and a hot air blower, the drying box is provided with a material dividing chamber, a drying chamber and a control chamber, the hot air blower is connected with the drying chamber through the control chamber; the material dividing chamber comprises a material dividing device, the material dividing device comprises a material dividing area and a storage area, the storage area is provided with three groups, and the mixed grains are divided into corresponding storage areas according to the grain sizes through the material dividing area; the three groups of storage areas are provided with discharge ports connected with the drying chamber, the discharge ports are provided with a discharge plate and a control device, and the control device is used to drive the discharge plate to move; the drying chamber is provided with a plurality of air outlets connected with the control chamber, and each air outlet is provided with an air induced plate; an adjustment plate is slidably connected with the control chamber, a plurality of air outlet adjustment parts are provided on the adjustment plate, and the adjustment plate is connected with the control device, the dryer can classify the mixed grains and then carry out targeted drying operations.

Description

Grain drier

Technical Field

The present invention relates to a dryer, and more particularly, to a grain dryer.

Background

The mechanization of grain drying is more important than the mechanization of field operation, and is an important guarantee condition for grain yield and harvest. Grain dryers are a necessary choice. The grain drier can be used for drying seeds to ensure the quality of the seeds and reduce the mildew of the grains so as to improve the grain yield, and the corn dried by the drier can be used for reducing the rate of bursting waist (namely broken rice) in the processing process and improving the quality of the rice so as to improve the quality of the rice, thereby improving the yield of peasants and people to eat rice with better taste and improving the quality of life.

In order to accelerate the drying process, mixed grains are dried, which means a process of simultaneously drying a plurality of grains (such as rice, wheat, barley, corn, rapeseed, soybean, etc.). The capacity of the dryer can be fully utilized by mixing and drying, the drying batch is reduced, and the drying efficiency is improved. Especially in large farms or grain processing plants.

The existing equipment with a good heat drying effect is a vertical hot air dryer, which dries it by hot air when falling, and grains can be roughly classified into large grains, medium grains and small grains according to their length and width, and the large grains include long grain rice (such as indica rice) because their grains are relatively long and wide. In addition, certain varieties of grains such as wheat, corn, etc. may also be classified as large grains due to the large grain size.

Middle grains (grain length between 5.51 and 6.6 mm, aspect ratio between 2.1 and 3.0 according to certain classification criteria) include middle size wheat, corn and like grains.

Small grains include short grain rice (e.g., japonica rice, short grain length, and aspect ratio less than 2.0). In addition, grains such as millet (millet), oat, barley, etc.

It is achieved that excessive drying of the cereal will result in a moisture content below the proper range for safe storage. The method not only can lead the grains to lose the original taste and nutritive value, but also can increase the fragility of the grains, so that the grains are more easily damaged in the subsequent processing and storage processes, and even cracks, popping and other conditions occur.

However, the grains with different sizes have different degrees of influence of heated wind due to factors such as different weights, different water contents and different descending speeds, so that the existing dryer has only a single drying effect, and cannot achieve a targeted drying effect on grains with different specifications.

Disclosure of Invention

In view of the deficiencies of the prior art, it is an object of the present invention to provide a grain dryer that sorts mixed grains and then performs a targeted drying operation.

The grain dryer comprises a drying box and a hot air blower, wherein a feed inlet is formed in the upper end of the drying box, a discharge outlet is formed in the lower end of the drying box, a material distributing cavity, a drying cavity and a control cavity are formed in the drying box, and the hot air blower is communicated with the drying cavity through the control cavity;

The material distributing cavity comprises a material distributing device, the material distributing device comprises a material distributing area and a storage area, the storage area is provided with three groups, and mixed grains are distributed into the corresponding storage areas according to grain sizes through the material distributing area;

The three groups of storage areas are provided with discharge ports communicated with the drying cavity, the discharge ports are provided with discharge plates and a control device, and the control device is used for driving the discharge plates to move;

A plurality of groups of air outlets communicated with the control cavity are arranged in the drying cavity, and an air guiding plate is arranged at each air outlet;

The inner sliding of the control cavity is connected with an adjusting plate, a plurality of groups of air port adjusting parts are arranged on the adjusting plate, the adjusting plate is connected with a control device, and when the control device is communicated with a discharge port through a discharge plate, the air port adjusting parts are communicated with an air outlet to form a hot air effect in a corresponding mode.

The invention is further characterized in that a first conveying group, a second conveying group and a third conveying group are sequentially arranged in the material dividing region from top to bottom, and material dividing gaps with different gaps are arranged on the first conveying group and the second conveying group.

The invention is further arranged that the first conveying group and the second conveying group both comprise a multi-component material belt, a material distributing motor and a material distributing wheel, wherein the material distributing belt is wound on the two material distributing wheels, and the material distributing motor is connected with one material distributing wheel;

The material distributing belt is provided with a material guiding block, and a material distributing gap is formed between the two material distributing belts.

The invention is further arranged that the third conveying group comprises a conveying belt, a conveying motor and conveying wheels, wherein the conveying belt is wound on the two conveying wheels, and the conveying motor is connected with one conveying wheel;

be provided with a plurality of air blowing openings on the conveyer belt, the air blowing opening all corresponds the setting with the branch material clearance, be provided with the hair-dryer outside the drying cabinet, the hair-dryer corresponds with the air blowing opening through the tuber pipe.

The control device comprises a double-shaft motor, a screw rod and a transmission rod, wherein the screw rod is provided with two groups and is respectively arranged at two ends of the double-shaft motor;

The transmission rod is provided with two groups, and all is L shape structure setting, the one end and the lead screw rotation of transmission rod are connected, and the other end is connected with regulating plate or row's flitch.

The invention is further characterized in that each air port adjusting part corresponds to an air outlet, each air port adjusting part comprises a first air adjusting channel, a second air adjusting channel and a third air adjusting channel which are distributed along the height direction of the adjusting plate, and the diameters and the lengths of the first air adjusting channel, the second air adjusting channel and the third air adjusting channel are different so as to form dry air with different wind speeds.

The invention is further provided with a plurality of groups of mounting rods and adjusting rods, wherein the adjusting rods are arranged at one ends of the mounting rods, and each adjusting rod is positioned in the drying cavity and between the two adjusting plates;

the drying cavity is internally provided with a sliding groove for the installation rod to slide, and the installation rod is provided with a sealing sleeve positioned in the sliding groove.

The invention is further provided with a plurality of groups of adjusting blocks which are arranged in the installation cavity and are in one-to-one correspondence with the adjusting rods, wherein the adjusting rods are connected to the installation rods through torsion springs in a rotating way, and one ends of the adjusting rods are abutted with the adjusting blocks in the downward moving process of the adjusting rods so that the adjusting rods rotate.

The invention further provides a control unit, wherein each storage area is internally provided with a storage sensor, and the control unit is respectively connected with the storage sensor and the control device.

The drying box is further provided with a material distributing disc and a rotating motor at the lower end, wherein the material distributing disc is rotatably connected in the drying box and is connected with the drying box, and at least three placing areas are arranged in the material distributing disc.

In summary, the invention has the advantages that the mixed grains enter the drying box from top to bottom through the feed inlet, firstly, the mixed grains pass through the material dividing area, are sequentially separated according to the size of the mixed grains, are divided into large grains positioned at the highest position, medium grains in the middle area and small grains in the lower area, and are respectively piled in the corresponding storage areas;

At this time, the control device selects the discharge opening on one storage area to be communicated with the through opening on the discharge plate, so that grains in the storage area can fall into the drying area along the through opening.

At this time, when the control device controls the discharging plate, the adjusting plate is controlled to move, so that the air port adjusting part corresponds to the air outlet, and the air port adjusting part has different structures and can form different blowing effects.

When the power of the hot air blower is constant, the larger the grain is, the faster the air outlet speed is, so that the grain drying effect is better, and the time length of the air stagnation is longer.

Drawings

FIG. 1 is a schematic perspective view of a grain dryer;

FIG. 2 is a schematic view of the structure of the inside of the dryer;

FIG. 3 is a schematic perspective view of a first transfer set;

Fig. 4 is a schematic perspective view of a third conveying set;

FIG. 5 is a schematic perspective view of an adjusting plate;

fig. 6 is a schematic view of the structure of the wind deflector and the adjusting lever.

The device comprises a drying box, a feeding port, a feeding cavity, a distributing cavity, a drying cavity, a 141, an air outlet, a 142, an induced air plate, a 15, a control cavity, a 16, a blower, a 2, an air heater, a 3, a distributing device, a 31, a distributing area, a 32, a storage area, a 321, a discharge port, a 33, a first conveying group, a 331, a distributing belt, a 332, a distributing motor, a 333, a distributing wheel, a 334, a guiding block, a 34, a second conveying group, a 35, a third conveying group, a 351, a conveying belt, a 352, a conveying motor, a 353, a conveying wheel, a 354, an air blowing port, a 36, a distributing gap, a 4, a discharging plate, a 5, a control device, a 51, a double-shaft motor, a 52, a screw, a 53, a transmission rod, a 6, an adjusting plate, a 61, an air inlet adjusting part, a 62, a first air adjusting channel, a 63, a second air adjusting channel, a 64, a third air adjusting channel, a 7, a mounting rod, a 71, an adjusting rod, a 72, a sealing sleeve, a 73, an adjusting block, a 9 and a control unit.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 6, in order to achieve the above objects, the present invention provides a grain dryer, comprising a drying box 1 and a hot air blower 2, wherein a feed inlet 11 is provided at the upper end of the drying box 1, a discharge outlet is provided at the lower end of the drying box 1, a material distributing cavity 13, a drying cavity 14 and a control cavity 15 are provided at the drying box 1, and the hot air blower 2 is communicated with the drying cavity 14 through the control cavity 15;

as shown in fig. 2, the material distributing chamber 13 is disposed above the drying chamber 14, and the control chamber 15 is disposed between the drying chamber 14 and the air heater 2.

The material distributing cavity 13 comprises a material distributing device 3, the material distributing device 3 comprises a material distributing area 31 and a storage area 32, the storage area 32 is provided with three groups, and mixed grains are distributed into the corresponding storage areas 32 according to grain sizes through the material distributing area 31;

The three groups of storage areas 32 are provided with discharge ports 321 communicated with the drying cavity 14, the discharge ports 321 are provided with discharge plates 4 and a control device 5, and the control device 5 is used for driving the discharge plates 4 to move;

a plurality of groups of air outlets 141 communicated with the control cavity 15 are arranged in the drying cavity 14, and an air guiding plate 142 is arranged at each air outlet 141;

the control cavity 15 is slidably connected with an adjusting plate 6, a plurality of groups of air port adjusting parts 61 are arranged on the adjusting plate 6, the adjusting plate 6 is connected with the control device 5, and when the control device 5 is communicated with the discharge port 321 through the discharge plate 4, the air port adjusting parts 61 are communicated with the air outlets 141 to form a hot air effect of a corresponding mode.

According to the design of the invention, mixed grains enter the drying oven 1 from top to bottom through the feed inlet 11, firstly, the mixed grains pass through the material dividing area 31, are sequentially separated according to the size of the mixed grains, are divided into large grains positioned at the highest position, medium grains in the middle area and small grains in the lower area, and are respectively piled in the corresponding storage areas 32;

At this time, the control device 5 selects the discharge port 321 on one storage area 32 to be communicated with the through port on the discharge plate 4, so that grains in the storage area 32 can fall into the drying area along the through port.

At this time, the control device 5 controls the discharging plate 4 and at the same time controls the adjusting plate 6 to move, so that the air outlet adjusting part 61 corresponds to the air outlet 141, and the air outlet adjusting part 61 has different structures, and can form different blowing effects.

When the power of the air heater 2 is constant, the larger the grain is, the faster the air outlet speed is, so that the grain drying effect is better, and the time length of the air stagnation is longer.

As shown in fig. 2, each storage area 32 is obliquely arranged, and when the discharge hole 321 corresponds to the through hole on the discharge plate 4, grains can fall into the drying cavity 14 along the slope.

In the first embodiment, a first conveying group 33, a second conveying group 34 and a third conveying group 35 are sequentially arranged in the material dividing area 31 from top to bottom, and material dividing gaps 36 with different gaps are arranged on the first conveying group 33 and the second conveying group 34.

The invention is further configured that the first conveying set 33 and the second conveying set 34 each comprise a multi-component material belt 331, a material distributing motor 332 and a material distributing wheel 333, wherein the material distributing belt 331 is wound on the two material distributing wheels 333, and the material distributing motor 332 is connected with one material distributing wheel 333;

The material distributing belt 331 is provided with a material guiding block 334, and a material distributing gap 36 is formed between the two material distributing belts 331.

As shown in fig. 3, the distributing motor 332 may be provided with a plurality of groups or one group, when the plurality of groups are provided, each distributing motor 332 corresponds to one group of the distributing belts 331, and when the plurality of groups are provided, a connecting rod is provided between the distributing wheels 333.

As shown in fig. 3, the separation gap 36 of the first conveying unit 33 is larger than the separation gap 36 of the second conveying unit 34, mixed grains enter into the separation zone 31, large grains cannot pass through the separation gap 36 of the first conveying unit 33, medium grains and small grains can pass through, and as the conveying of the separation belt 331, the large grains can be conveyed to the storage area 32.

Similarly, the small grains can drop onto the third conveying set 35 while the mixed grains after the first screening pass through the second conveying set 34, and the medium grains are retained. Thereby enabling the formation of a screen of three different sizes of grains.

And as shown in fig. 3, the guide blocks 334 are inclined, so that grain accumulation can be avoided, when the size of the equipment is oversized, the equipment can be provided with a multi-component material belt 331, at this time, both sides of the middle guide block 334 are inclined, and the guide blocks 334 at both sides are inclined in one-way.

The third conveying set 35 comprises a conveying belt 351, a conveying motor 352 and conveying wheels 353, wherein the conveying belt 351 is wound on the two conveying wheels 353, and the conveying motor 352 is connected with one conveying wheel 353;

A plurality of air blowing openings 354 are formed in the conveyor belt 351, the air blowing openings 354 are arranged corresponding to the material distributing gaps 36, a blower 16 is arranged outside the drying box 1, and the blower 16 corresponds to the air blowing openings 354 through an air outlet pipe.

As shown in fig. 4, the size of the air blowing opening 354 is far smaller than the grain size, so that the air blowing opening 354 can be prevented from being blocked by grains, when the air blower 16 blows upwards, the air blowing opening 354 can act on the inside of the material distributing gap 36, preliminary air drying can be performed (in order to avoid excessive heat drying, the air blower 16 is preferably not provided with a heating function, but the air blower 16 with the heating function can be provided according to requirements), and the grains are blown to move, so that the situation that small grains cannot pass through the material distributing gap 36 due to accumulation of large grains is avoided.

Preferably, the blower 16 is capable of intermittently blowing out gusts of air, thereby avoiding the situation where grains cannot fall.

In order to improve the controllability of screening, a filter screen is arranged between the material distributing belts.

In the second embodiment, a material distributing device is arranged in the material distributing area, the material distributing device is designed for an existing vibrating disc, the vibrating disc sequentially comprises a first vibrating seat, a second vibrating seat, a third vibrating seat and a base from top to bottom, filter holes are formed in the first vibrating seat and the second vibrating seat, the filter holes in the first vibrating seat are larger than those in the second vibrating seat, mixed grains can be screened through the first vibrating seat and the second vibrating seat, large grains remain on the first vibrating seat in the vibrating process, medium grains remain on the second vibrating seat, and small grains drop on the third vibrating seat.

The first vibration seat, the second vibration seat and the third vibration seat are fixedly assembled, the third vibration seat is connected with the base through the vibration spring, and the vibrator is arranged on the base, so that the first vibration seat, the second vibration seat and the third vibration seat can vibrate.

And then the first vibration seat, the second vibration seat and the third vibration seat are respectively provided with a material distributing opening, and the material distributing openings are controlled to be opened and closed through electromagnetic valves.

Further, still be provided with flip structure on the base, the base is including unable adjustment base and upset base, and flip structure is including the upset cylinder on unable adjustment base's one end articulates for promote the upset base and overturn, thereby make the cereal in first vibration seat and second vibration seat and the third vibration seat can incline, thereby in the feed opening gliding to the storage area.

The control device 5 comprises a double-shaft motor 51, a screw rod 52 and a transmission rod 53, wherein the screw rod 52 is provided with two groups and is respectively arranged at two ends of the double-shaft motor 51;

The transmission rod 53 is provided with two groups, and all is L shape structure setting, and the one end and the lead screw 52 rotation of transmission rod 53 are connected, and the other end is connected with regulating plate 6 or row material board 4.

The double-shaft motor 51 is designed to synchronously control the movement of the regulating plates 6 and the discharging plates 4 at two sides, thereby realizing the function of synchronous movement.

Or a double-motor design is adopted, and synchronous control of the regulating plate 6 and the discharging plate 4 is realized through a parallel circuit.

The present invention further provides that each tuyere adjusting portion 61 corresponds to an air outlet 141, and each tuyere adjusting portion 61 includes a first air adjusting channel 62, a second air adjusting channel 63 and a third air adjusting channel 64 arranged along the height direction of the adjusting plate 6, and the diameters and the lengths of the first air adjusting channel 62, the second air adjusting channel 63 and the third air adjusting channel 64 are different to form dry air with different wind speeds.

As shown in fig. 5, when the power of the air heater 2 is constant, the smaller the air speed is, the faster the air speed is, and the larger the air speed is, the slower the air speed is, for each air port regulating portion 61 having the air regulating passage of different diameter length dimensions.

The bigger the grain is, the faster the wind speed is, the better the drying effect can be carried out, the longer the air stagnation effect is, and the longer the drying time is.

When the grains are smaller, the wind speed is slower, and the drying effect is moderate.

The invention is further provided with a plurality of groups of mounting rods 7 and adjusting rods 71 on the adjusting plates 6, the adjusting rods 71 are mounted at one end of the mounting rods 7, and each adjusting rod 71 is positioned in the drying cavity 14 and between the two adjusting plates 6;

A sliding groove for sliding the mounting rod 7 is arranged in the drying cavity 14, and a sealing sleeve 72 positioned in the sliding groove is arranged on the mounting rod 7.

The invention is further provided with the adjusting rod 71 rotatably connected to the mounting rod 7 through the torsion spring, a plurality of groups of adjusting blocks 73 are arranged in the mounting cavity, the adjusting blocks 73 are arranged in one-to-one correspondence with the adjusting rod 71, and when the adjusting rod 71 moves downwards, one end of the adjusting rod 71 is abutted against the adjusting blocks 73, so that the adjusting rod 71 rotates.

As shown in fig. 5 and 6, the sliding groove is used for sliding the mounting rod 7, the sliding grooves for sliding the sealing sleeve 72 are further formed in the upper end and the lower end of the sliding groove, the mounting rod 7 is connected in the sliding groove in a sliding manner, the sealing sleeve 72 is connected in the sliding grooves in a sliding manner, and when the mounting rod 7 slides up and down, the sealing sleeve 72 can ensure the sealing of the sliding groove.

And when the mounting rod 7 slides up and down, the adjusting rod 71 can be abutted with the adjusting block 73, so that the adjusting rod 71 rotates.

Further, when the small grain falls first, the adjusting rod 71 is in a vertical state, and the adjusting rod 71 is less collided with the grain at this time, so that the grain can stably fall.

When the middle grain falls, the adjusting rod 71 is in a slightly inclined state, and the adjusting rod 71 at the moment can collide with the grain at a proper part, so that the grain falling time is delayed, the falling speed is reduced, and the drying time is improved.

When large grains fall, the inclination angle of the adjusting rod 71 is increased, the touchable area is increased, the gap between the adjusting rod and the air inducing plate 142 is reduced, the falling speed of the grains is greatly reduced, and a good drying effect is achieved.

The torsion spring is designed to keep the adjusting plate 6 in a vertical state as much as possible, and when the adjusting lever 71 is separated from the adjusting block 73, the torsion spring gradually tends to be vertical.

The invention is further arranged to comprise a control unit 9, each storage area 32 is internally provided with a storage sensor, and the control unit 9 is respectively connected with the storage sensors and the control device 5. The design of this structure, the storage inductor can be pressure sensor or infrared inductor for detect the circumstances of placing cereal of storage area 32, when cereal piles up more, can send the signal to control unit 9, thereby make the storage area 32 of many cereal positions to carrying out the stoving operation, avoid excessively piling up.

The invention is further characterized in that a material distributing disc and a rotating motor are arranged at the lower end of the drying box 1, the material distributing disc is rotatably connected in the drying box 1 and is connected with the drying box, and at least three placing areas are arranged in the material distributing disc.

The design of this structure (not shown in the figure) can drive the feed divider through rotating the motor and rotate, when releasing different specification and size's cereal, can correspond the district of placing in different regions to form effectual induction.

The application also includes a lifter, and the lifter and the wind deflector 142 are all in the existing structure, which is not described herein.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims (10)

1. The grain dryer is characterized by comprising a drying box (1) and a hot air blower (2), wherein a feed inlet (11) is formed in the upper end of the drying box (1), a discharge outlet is formed in the lower end of the drying box (1), a material distributing cavity (13), a drying cavity (14) and a control cavity (15) are formed in the drying box (1), and the hot air blower (2) is communicated with the drying cavity (14) through the control cavity (15);

The material distribution cavity (13) comprises a material distribution device (3), the material distribution device (3) comprises a material distribution area (31) and a storage area (32), the storage area (32) is provided with three groups, and mixed grains are distributed into the corresponding storage areas (32) through the material distribution area (31) according to grain sizes;

The three groups of storage areas (32) are provided with discharge ports (321) communicated with the drying cavity (14), the discharge ports (321) are provided with discharge plates (4) and a control device (5), and the control device (5) is used for driving the discharge plates (4) to move;

A plurality of groups of air outlets (141) communicated with the control cavity (15) are arranged in the drying cavity (14), and an air guiding plate (142) is arranged at each air outlet (141);

The control cavity (15) is slidably connected with an adjusting plate (6), a plurality of groups of air port adjusting parts (61) are arranged on the adjusting plate (6), the adjusting plate (6) is connected with the control device (5), and when the control device (5) is communicated with the discharge port (321) through the discharge plate (4), the air port adjusting parts (61) are communicated with the air outlets (141) to form a hot air effect in a corresponding mode.

2. The grain drier as claimed in claim 1, wherein the first conveying group (33), the second conveying group (34) and the third conveying group (35) are sequentially arranged in the material dividing area (31) from top to bottom, and material dividing gaps (36) with different gaps are arranged on the first conveying group (33) and the second conveying group (34).

3. The grain drier as claimed in claim 2, wherein the first and second conveying sets (33, 34) each comprise a multi-component material belt (331), a distributing motor (332) and distributing wheels (333), the distributing belt (331) is wound around two distributing wheels (333), and the distributing motor (332) is connected with one distributing wheel (333);

the material distributing belts (331) are provided with material guiding blocks (334), and a material distributing gap (36) is formed between the two material distributing belts (331).

4. The grain drier as claimed in claim 2, wherein the third conveyor set (35) comprises a conveyor belt (351), a conveyor motor (352) and conveyor wheels (353), the conveyor belt (351) is wound around the two conveyor wheels (353), and the conveyor motor (352) is connected to a conveyor wheel (353);

Be provided with a plurality of blowing openings (354) on conveyer belt (351), blowing openings (354) all correspond setting with branch material clearance (36), drying cabinet (1) are provided with hair-dryer (16) outward, hair-dryer (16) correspond with blowing openings (354) through the tuber pipe.

5. The grain drier according to claim 1, wherein the control device (5) comprises a double-shaft motor (51), a screw rod (52) and a transmission rod (53), wherein the screw rod (52) is provided with two groups and is respectively arranged at two ends of the double-shaft motor (51);

the transmission rods (53) are arranged in two groups and are all in an L-shaped structure, one ends of the transmission rods (53) are rotationally connected with the screw rods (52), and the other ends of the transmission rods are connected with the adjusting plate (6) or the discharging plate (4).

6. A grain drier according to claim 5, wherein each of the tuyere adjusting portions (61) corresponds to an air outlet (141), and each of the tuyere adjusting portions (61) includes a first air adjusting channel (62) and a second air adjusting channel (63) and a third air adjusting channel (64) arranged along a height direction of the adjusting plate (6), and the first air adjusting channel (62) and the second air adjusting channel (63) and the third air adjusting channel (64) are different in radial length and size to form drying air of different wind speeds.

7. The grain drier as claimed in claim 6, wherein the adjusting plates (6) are provided with a plurality of groups of mounting rods (7) and adjusting rods (71), the adjusting rods (71) are mounted at one ends of the mounting rods (7), and each adjusting rod (71) is positioned in the drying cavity (14) and between the two adjusting plates (6);

the drying cavity (14) is internally provided with a sliding groove for the installation rod (7) to slide, and the installation rod (7) is provided with a sealing sleeve (72) positioned in the sliding groove.

8. The grain drier as claimed in claim 7, wherein the adjusting rod (71) is rotatably connected to the mounting rod (7) through a torsion spring, a plurality of groups of adjusting blocks (73) are arranged in the mounting cavity, the adjusting blocks (73) are arranged in one-to-one correspondence with the adjusting rod (71), and when the adjusting rod (71) moves downwards, one end of the adjusting rod (71) is abutted with the adjusting block (73) so that the adjusting rod (71) rotates.

9. A grain drier according to any one of claims 1 to 8, further comprising a control unit (9), wherein each storage area (32) is provided with a storage sensor, and the control unit (9) is connected to the storage sensor and the control unit (5), respectively.

10. The grain drier as claimed in claim 9, wherein a material distributing tray and a rotating motor are arranged at the lower end of the drying box (1), the material distributing tray is rotatably connected in the drying box (1) and is connected with the drying box, and at least three placing areas are arranged in the material distributing tray.