Gradual multi-channel feeding and discharging grain dryer

Abstract

The invention discloses a gradual multi-channel feeding and discharging grain dryer, relates to the technical field of grain drying, and aims to solve the problem that grains are easily excessively dried due to the fact that monitoring and interception guiding are not performed in the direct drying process of the grains. By sensing whether the water content of grain discharged into the drying box reaches a threshold value or not, a motor located in a sleeve is automatically controlled to work, a first triangular barrel on a rotating sleeve is driven by the motor to rotate, grain in the drying box is intercepted in cooperation with a fixedly-arranged second triangular barrel, and under the participation of an air cylinder, a movable shaft in the first triangular barrel is pushed to slide; and the baffle block located in the first triangular cylinder is pushed to move up and down, at the moment, the grains are automatically discharged into the first triangular cylinder and are automatically discharged out of the drying box along with rotation of the material rolling blade rod, the grains are prevented from continuously moving in the drying box to be excessively dried, and it is ensured that the grains are evenly dried.

Description

Technical Field

[0001] The invention relates to the technical field of grain drying, in particular to a progressive multi-channel feeding and discharging grain dryer. Background Art

[0002] The grain dryer is equipped with multiple drying bins that can dry multiple grains at the same time. The multiple drying bins are arranged side by side, and each drying bin is surrounded by a mesh ventilation plate. The multiple drying bins in the dryer body share a heat recovery chamber and a ventilation duct. The heat recovery chamber is arranged in parallel above the ventilation duct. The bottom of the ventilation duct is open and directly communicated with each drying bin. The heat recovery chamber is connected to an external flue gas induced draft fan and a hot air furnace through the flue gas duct, and the ventilation duct is connected to an external cold air fan. The material is scattered, dispersed, suspended and moved forward in a moving state, and heat exchange is performed within a set time.

[0003] The moisture content of grain entering the continuous drying bin varies due to different batches and different storage locations. If you want to keep the grain drying uniform, you need to monitor the moisture content of the grain before feeding, and discharge the grain in time according to the drying degree during the drying process to avoid over-drying or insufficient drying of the grain.

[0004] Therefore, we propose a grain dryer with progressive multi-channel feeding and discharging. Summary of the invention

[0005] The object of the present invention is to provide a progressive multi-channel grain dryer for feeding and discharging materials, so as to solve the problem of over-drying of grains caused by direct drying of grains without monitoring and interception guidance proposed in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a progressive multi-channel feeding and discharging grain dryer, comprising a drying box, a hoist is installed on one side of the drying box, sleeves are symmetrically installed on both sides of the drying box, the sleeves are evenly fixed with ventilation pipes in the drying box, one side of the sleeve is connected to a blower, and the other side of the sleeve is connected to a material receiving channel;

[0007] Baffles are symmetrically fixed to the inner walls of both sides of the drying box by spot welding. Blocking mechanisms are symmetrically and movably connected inside the drying box and located on both sides of the sleeve. Two triangular cylinders are fixedly connected to the opposite surfaces of the two blocking mechanisms.

[0008] Furthermore, the blocking mechanism includes a triangular cylinder, a block and a movable shaft. The inner wall of the sleeve located on the material receiving channel side is symmetrically and movably connected with the triangular cylinder. One side of the triangular cylinder passes through the drying box and extends into the sleeve on the other side. One side of the triangular cylinder is slidably connected with a block. One side of the triangular cylinder is slidably connected with a movable shaft. A rotating sleeve is fixed to one side of the triangular cylinder located in the sleeve by bolts. One end of the movable shaft passes through the triangular cylinder and the rotating sleeve and is slidably connected to the rotating sleeve.

[0009] Furthermore, the blocking mechanism also includes abutment rods and winding blade rods, the inner walls on both sides of the triangular cylinder are symmetrically and movably connected with the abutment rods, one end of the abutment rods is abutted with the outer wall of the movable shaft through a U-shaped clamp, the outer wall of the movable shaft is sleeved with a spring, the inner walls on both sides of the triangular cylinder are movably connected with the winding blade rods through bearings, and one end of the winding blade rod passes through the triangular cylinder and is sleeved and fixed with a gear.

[0010] Furthermore, the movable shaft is located in the sleeve and is fixed with a gear sleeve, and the gear sleeve is meshed and connected with a gear sleeve on the coiling blade rod. The movable shaft is located on the gear sleeve side and is also slidably connected with a transmission tooth 1.

[0011] Furthermore, a turntable is evenly and movably connected to the inner wall of the sleeve, and the turntables are sleeved with each other through a belt. One side of the turntable is movably connected to a second transmission tooth, and the second transmission tooth is meshed with the first transmission tooth.

[0012] Furthermore, a baffle is installed on one side of the turntable, and a butt column is evenly fixed on one side of the baffle, and the abutting side is respectively engaged with the holes on the turntable, and a cylinder is evenly fixed on the inner wall of the sleeve by bolts, and one end of the cylinder abuts against the baffle.

[0013] Furthermore, a discharge port is provided on the side of the material receiving channel, and an air outlet is installed on the other side of the material receiving channel. The air outlet is connected to multiple groups of ventilation pipes on the inner wall of the sleeve through pipelines, and a controller is installed on the outer wall of the drying box.

[0014] Furthermore, the controller includes a humidity collection unit and a drying path decision unit, wherein the humidity collection unit is used to obtain the comprehensive change data of grain humidity at the discharge port of the elevator, and send the collected comprehensive change data of grain humidity to the drying path decision unit;

[0015] The comprehensive change data of grain humidity include the floating value of internal and external air humidity, the average number of suspended impurities and the temperature difference between internal and external air;

[0016] The drying path decision unit is used to set the humidity monitoring cycle of grain in the drying box, and to formulate the acquired comprehensive change data of grain humidity, generate corresponding discharge signals to control the powered equipment in the drying box, and change the discharge position of grain in the drying box.

[0017] The progressive multi-channel feeding and discharging grain drying method is as follows:

[0018] Set the monitoring cycle, obtain the humidity change data of the grain discharged from the elevator outlet through the front-end sensor in the controller, and discharge the gas with a temperature of 55-60℃ from the side of the blower in advance to preheat the ventilation pipe in the drying box;

[0019] The concentrated grain flows down gradually along the top of the drying box, constantly contacts the preheated ventilation pipe, and is finally discharged from the bottom of the drying box and returns to the elevator for circulating discharge. At the same time, according to the grain moisture change data obtained by the controller, when the grain reaches the drying threshold, the grain is prevented from being over-dried. The motor in the sleeve drives the upper rotating sleeve of the triangular cylinder to rotate 180°, and at the same time, the cylinder pushes the baffle plate to squeeze the movable shaft to slide, causing the upper baffle of the triangular cylinder to rise, and the grain in the drying box enters the triangular cylinders one and two, and is discharged into the receiving channel through the rotating coiling blade.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the present invention, the moisture content of the external grain is first monitored in real time through the controller installed on the drying box, and then the high-temperature gas is discharged into the ventilation pipe in the drying box through the blower to assist in drying the grain in the descending process, and the grain is dried by the progressive flow of the grain in the drying box. After that, after the controller senses that the moisture content of the grain has reached the threshold, it automatically controls the motor in the sleeve to work, and uses the motor to drive the triangular cylinder 1 on the rotating sleeve to rotate, and cooperates with the fixed triangular cylinder 2 to intercept the grain in the drying box, and with the participation of the cylinder, the movable shaft in the triangular cylinder 1 is pushed to slide, and the stopper in the triangular cylinder 1 is pushed to move up and down. At this time, the grain is automatically discharged into the triangular cylinder 1, and the grain is automatically discharged from the drying box with the rotation of the coiling blade rod, so as to avoid excessive drying of the grain due to continuous movement in the drying box, thereby ensuring uniform drying of the grain. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the grain dryer with progressive multi-channel feeding and discharging of the present invention;

[0023] Figure 2 This is a schematic diagram of the grain blocking movement of the barrier mechanism in the drying box of the present invention;

[0024] Figure 3 It is a schematic diagram of the overall structure of the barrier mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the connection structure between the blocking mechanism and the transmission assembly of the present invention;

[0026] Figure 5 It is a schematic diagram of the front cross-sectional structure of the barrier mechanism of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection structure between the upper support column of the baffle plate and the rotating plate of the present invention;

[0028] Figure 7 This is a schematic diagram of the triangular tube distribution structure of the drying box of the present invention during normal material discharge.

[0029] In the figure: 1. drying box; 2. elevator; 3. blower; 4. sleeve; 5. material receiving channel; 6. ventilation pipe; 7. baffle; 8. blocking mechanism; 801. triangular cylinder 1; 802. baffle; 803. movable shaft; 804. abutment rod; 805. spring; 806. rotating sleeve; 807. winding blade rod; 9. gear sleeve; 10. transmission gear 1; 11. transmission gear 2; 12. turntable; 13. baffle plate; 14. cylinder; 15. abutment column; 16. triangular cylinder 2; 17. air outlet; 18. material outlet; 19. controller. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-7 , the present invention provides a technical solution:

[0032] Example 1: Drying the grains by exhausting them, using high-temperature airflow and the slow movement of the grains by gravity to assist in drying, accelerating the discharge of excess water from the grains. Figure 1 As shown, an interval discharge device is arranged at the bottom of the main drying box 1, and the grain in the granary is then discharged into the drying box 1 through multiple sets of elevators 2, with continuous discharge at the bottom of the box and continuous feeding at the top of the box, forming a grain circulation drying path;

[0033] In the drying operation of grains in the drying box 1, a plurality of evenly distributed ventilation pipes 6 are conventionally provided. The ventilation pipes 6 are made of sealed hollow stainless steel pipes and penetrate the drying box 1. The plurality of ventilation pipes 6 constitute a plurality of moving paths to slow down the movement rate of grains in the drying box 1. Figure 7As shown, sleeves 4 are symmetrically arranged on both sides of the drying box 1, and the vents at both ends of the vent pipe 6 evenly arranged in the drying box 1 are connected to the sleeves 4;

[0034] The blower 3 is connected to the upper and lower sides of the single-sided sleeve 4. The blower 3 in working state discharges the external heated gas into the ventilation pipe 6 to preheat the ventilation pipe 6. After the grain contacts the surface of the ventilation pipe 6, the moisture on the surface of the grain is dried. The cooling gas is recovered in the sleeve 4 on the other side, and finally discharged into the external heating component through the air outlet 17 on the material receiving channel 5 for reheating. In the existing structure, the grain dryer will use wind to suck the empty shells and debris in the grain, and introduce them into the external combustion mechanism to heat the air and discharge it back into the drying box 1 to avoid waste of resources.

[0035] In order to prevent the grain from being over-dried in the drying box 1, a triangular tube 1 801 and an independently arranged triangular tube 2 16 are symmetrically installed between the ventilation pipes 6 arranged on the inner wall of the drying box 1. Figure 7 As shown, the cross-sectional structures of the three are the same as those of the vent pipe 6, which are all triangular, but the triangular tubes are different from the vent pipe 6 in size and conventional position distribution. The arrangement of the triangular tube 1 801 and the triangular tube 2 16 does not hinder the movement of grain in the drying box 1. The conventional arrangement of the three here refers to the pointed ends of the triangular tube 1 801 on both sides facing upward, while the pointed ends of the triangular tube 2 16 always face downward;

[0036] like Figure 2 As shown, it involves the rotation of the triangular cylinder 801 in the blocking mechanism 8, and slots are provided on both sides of the sleeve 4 in the drying box 1 to prevent the grain from being discharged from the slots during the normal downward movement. Baffles 7 are symmetrically provided on the top of the slots on the inner wall of the drying box 1 to limit the movement range of the grain.

[0037] When the grain is fully dried in the drying box 1, it is necessary to discharge the grain from the drying box 1 in time. The grain can be discharged directly from the middle or other parts of the drying box 1 to avoid excessive drying caused by continuous downward movement of the grain. For this purpose, the two side triangular cylinders 1 801 and the two triangular cylinders 16 are provided to form a partition to intercept the grain in the downward movement of the drying box 1. Figure 2 As shown, different from the conventional arrangement of the triangular cylinder 1 801 and the triangular cylinder 2 16, the triangular cylinders 1 801 on both sides rotate 180 degrees, and the two form an interception line to limit the continuous movement of the grain;

[0038] Considering the need to rotate the triangle cylinder 801, combined with Figure 3 and Figure 4It can be understood that the rotating sleeve 806 is fixedly connected to the center of the outer side of the triangular cylinder 801 by spot welding, and the rotating sleeve 806 is driven by the motor to rotate, so that the triangular cylinder 801 can rotate. However, considering that the coiling blade rod 807, the stopper 802 and other components are also installed in the triangular cylinder 801, they rotate at the same time. At this time, the grains falling in the drying box 1 are constantly accumulated on the triangular cylinder 801, and automatic discharge needs to be started;

[0039] A stopper 802 is slidably connected to the outer wall of the triangular cylinder 801, and then the stopper 802 is pushed up to form a flow channel on the outer wall of the triangular cylinder 801, and small grains of food can be discharged into the triangular cylinder 801 through the flow channel, and then the food in the triangular cylinder 801 is continuously rolled by the rotating coiling blade rod 807, and finally discharged into the receiving channel 5. Both the movement of the stopper 802 and the rotation of the coiling blade rod 807 are required, and a movable shaft 803 is slidably connected to the rotating sleeve 806, such as Figure 5 As shown, one end of the movable shaft 803 passes through the triangular cylinder 801, and a gear sleeve 9 is fixedly mounted on the outer wall of the movable shaft 803, and the gear sleeve 9 is meshed and connected with the gear on the coiling blade rod 807, so the rotation of the movable shaft 803 can realize the rotation of the coiling blade rod 807;

[0040] like Figure 4 As shown, a transmission tooth 2 11 is movably connected inside the sleeve 4, a turntable 12 is fixed on the central axis of the transmission tooth 2 11, and a transmission tooth 10 is slidably engaged on the surface of the movable shaft 803, the transmission tooth 10 is meshed and connected with the transmission tooth 2 11, and the transmission tooth 10 is restricted in the sleeve 4 and cannot move. When the transmission tooth 2 11 rotates actively, the movable shaft 803 can be driven to rotate, and the rotation of the movable shaft 803 also completes the rotation of the coiling blade 807;

[0041] When the position of the stopper 802 is adjusted, the abutment rod 804 installed on the inner wall of the triangular cylinder 801 is clamped with one side of the stopper 802, and the U-shaped clamping head on the abutment rod 804 is abutted with the outer wall of the movable shaft 803. Figure 5 As shown, when the entire movable shaft 803 is squeezed to the left, the rotating abutment rod 804 pushes the stopper 802 on the inner wall of the triangular cylinder 801 to move upward, so as to open the grain discharge port and facilitate the reset of the movable shaft 803. A spring 805 is sleeved on its outer wall. For adjusting the position of the movable shaft 803, a baffle plate 13 is clamped on one side of the rotating disk 12, and a support column 15 is arranged on the baffle plate 13. A cylinder 14 is installed in the sleeve 4 on the side of the baffle plate 13.

[0042] When the cylinder 14 pushes the baffle plate 13 to move to the left, the support column 15 protruding from the side of the rotating disk 12 squeezes the movable shaft 803, thereby partially pushing the block 802 out of the triangular cylinder 1 801. At this time, the support column 15 on the side of the rotating disk 12 continuously contacts the movable shaft 803 during the rotation of the transmission gear 2 11, and the generated vibration continuously drives the block 802 to move, thereby accelerating the speed at which the grain at the top of the triangular cylinder 1 801 enters, and also avoids the grain from being blocked in the triangular cylinder 1 801.

[0043] The grain in the drying box 1 is fixed by first rotating the blocking triangular cylinder 801, and then the grain is transferred by the telescopic movement of the baffle 7. Finally, the grain is discharged in a centralized manner by the rotation of the coiling blade 807, thus avoiding the problem of excessive drying caused by the continuous movement of the grain in the drying box 1.

[0044] Embodiment 2: The loss of moisture in the drying process of grain in the drying box 1 and timely interception need to be monitored and processed by the controller 19;

[0045] The controller 19 includes a humidity collection unit and a drying path decision unit, wherein the humidity collection unit is used to obtain the comprehensive change data of the grain humidity at the discharge port 18 of the elevator 2, and send the collected comprehensive change data of the grain humidity to the drying path decision unit;

[0046] When the grain enters the drying box 1, it is impossible to directly and quickly obtain the moisture content of the grain during the monitoring period, so the external conditions are used for auxiliary judgment, wherein the comprehensive change data of the grain humidity include the floating value of the internal and external air humidity, the average number of suspended impurities and the temperature difference of the internal and external air;

[0047] The floating value of the internal and external air humidity indicates the change value of the humidity around the grain discharged from the outlet side of the elevator 2. Water exists in two different states in grain, one is free water and the other is bound water. For cereal grains, if the moisture content is below 13.5%, it can be regarded as all bound water. The life activity of the grain is very weak, and microorganisms cannot use this bound water for growth and development. At this time, the grain will not mold. If the moisture content of the grain increases, the life activity will continue to increase. The high moisture content will make the life activity vigorous, which will not only consume nutrients and cause a decrease in dry matter, but also release heat and moisture. Therefore, grains with more free water are prone to heat and mold. The moisture around the grain increases during the discharge process. At the same time, the internal and external air temperature difference indicates the difference between the temperature around the grain and the air temperature at this time. The greater the moisture content of the grain, the greater the floating value of the internal and external air humidity and the internal and external air temperature difference.

[0048] Similarly, the increase of moisture around the grain will cause the weight of impurities and empty shells to increase, and the number of impurities in the grain adsorbed by the same suction force will be less. Therefore, the moisture content of the discharged grain can also be monitored by the average number of suspended impurities.

[0049] The drying path decision unit obtains the comprehensive change data of grain humidity in real time during the humidity monitoring cycle in the drying box 1, and processes the obtained data, specifically:

[0050] The floating value of internal and external air humidity, the average number of suspended impurities, and the temperature difference between internal and external air are defined as Ks, Kz, and Kw respectively;

[0051] According to the formula Obtain the grain drying path adjustment value, where d1, d2 and d3 are correction factors, and d2>d1>d3>1, and compare it with the grain drying path adjustment threshold stored in the drying path decision unit. When the grain drying path adjustment value is greater than or equal to the grain drying path adjustment threshold, it is judged that the grain moisture at this time is high, and a continuous circulation signal is generated;

[0052] When the grain drying path adjustment value is less than the grain drying path adjustment threshold, it is judged that the moisture content of the grain is low, and a flow cut-off signal is generated to control the motor in the sleeve 4 and the transmission components of the cylinder 14 to move the grain in the drying box 1 into the receiving channel 5.

[0053] Additionally, considering that the drying box 1 is only operated in the middle section, the height of the drying box 1 can be appropriately increased, and more interception mechanisms can be provided on the drying box 1, so as to achieve more accurate grain sorting.

[0054] The working process and principle of the present invention are as follows:

[0055] A monitoring cycle is set on the drying box 1, and the humidity change data of the grain discharged from the discharge port 18 of the elevator 2 is obtained through the front-end sensor in the controller 19, and the gas with a temperature of 55-60°C is discharged from the side of the blower 3 in advance to preheat the ventilation pipe 6 in the drying box 1;

[0056] The grain discharged by the elevator 2 flows down gradually along the top of the drying box 1, constantly contacts the preheated ventilation pipe 6, and is finally discharged from the bottom of the drying box 1 and returns to the elevator 2 for circulating discharge. At the same time, according to the grain moisture change data obtained by the controller 19, when the grain reaches the drying threshold, the grain is prevented from being over-dried. The motor in the sleeve 4 drives the rotating sleeve 806 on the triangular cylinder 801 to rotate 180°. At the same time, the cylinder 14 pushes the baffle plate 13 to squeeze the movable shaft 803 to slide, causing the baffle 802 on the triangular cylinder 801 to rise. The grain in the drying box 1 enters the triangular cylinder 801 and the triangular cylinder 16, and is discharged into the receiving channel 5 through the rotating coiling blade 807.

[0057] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A progressive multi-channel grain dryer, comprising a drying box (1), characterized in that: A hoist (2) is installed on one side of the drying box (1), sleeves (4) are symmetrically installed on both sides of the drying box (1), and the sleeves (4) are evenly fixedly provided with ventilation pipes (6) in the drying box (1), one side of the sleeve (4) is connected to a blower (3), and the other side of the sleeve (4) is connected to a material receiving channel (5); Baffles (7) are symmetrically fixed to the inner walls of both sides of the drying box (1) by spot welding, and blocking mechanisms (8) are symmetrically and movably connected inside the drying box (1) and located on both sides of the sleeve (4), and triangular cylinders (16) are fixedly connected to the opposite surfaces of the two blocking mechanisms (8).

2. A progressive multi-channel feeding and discharging grain dryer according to claim 1, characterized in that: The blocking mechanism (8) comprises a triangular cylinder (801), a stopper (802) and a movable shaft (803); the inner wall of the sleeve (4) located on the material receiving channel (5) side is symmetrically and movably connected with the triangular cylinder (801); one side of the triangular cylinder (801) passes through the drying box (1) and extends into the sleeve (4) on the other side; one side of the triangular cylinder (801) is slidably connected with the stopper (802); one side of the triangular cylinder (801) is slidably connected with the movable shaft (803); one side of the triangular cylinder (801) located in the sleeve (4) is fixed with a rotating sleeve (806) by bolts; one end of the movable shaft (803) passes through the triangular cylinder (801) and the rotating sleeve (806) and is slidably connected with the rotating sleeve (806).

3. A progressive multi-channel feeding and discharging grain dryer according to claim 2, characterized in that: The blocking mechanism (8) also includes abutment rods (804) and coiling blade rods (807), the inner walls on both sides of the triangular cylinder (801) are symmetrically and movably connected with the abutment rods (804), one end of the abutment rods (804) is abutted with the outer wall of the movable shaft (803) through a U-shaped clamp, the outer wall of the movable shaft (803) is sleeved with a spring (805), the inner walls on both sides of the triangular cylinder (801) are movably connected with the coiling blade rods (807) through bearings, and one end of the coiling blade rod (807) passes through the triangular cylinder (801) and is sleeved and fixed with a gear.

4. A progressive multi-channel feeding and discharging grain dryer according to claim 3, characterized in that: The movable shaft (803) is located inside the sleeve (4) and is sleeved and fixed with a gear sleeve (9), and the gear sleeve (9) is meshingly connected with a gear sleeved on the coiling blade rod (807). The movable shaft (803) is located on the side of the gear sleeve (9) and is also sleeved and slidably connected with a transmission tooth 1 (10).

5. A progressive multi-channel feeding and discharging grain dryer according to claim 4, characterized in that: The inner wall of the sleeve (4) is evenly and movably connected with a rotating disk (12), and the rotating disks (12) are sleeved with each other via a belt. One side of the rotating disk (12) is movably connected with a second transmission tooth (11), and the second transmission tooth (11) is meshedly connected with the first transmission tooth (10).

6. A progressive multi-channel feeding and discharging grain dryer according to claim 5, characterized in that: A baffle plate (13) is installed on one side of the rotating disk (12), and a butt column (15) is evenly fixed on one side of the baffle plate (13), and the abutting side is respectively engaged with the holes on the rotating disk (12), and a cylinder (14) is evenly fixed on the inner wall of the sleeve (4) by bolts, and one end of the cylinder (14) is correspondingly abutted with the baffle plate (13).

7. The progressive multi-channel grain dryer according to claim 1, characterized in that: A discharge port (18) is provided on one side of the material receiving channel (5), and an air outlet (17) is installed on the other side of the material receiving channel (5). The air outlet (17) is connected to a plurality of groups of ventilation pipes (6) on the inner wall of the sleeve (4) through a pipeline. A controller (19) is installed on the outer wall of the drying box (1).

8. The progressive multi-channel grain dryer according to claim 7, characterized in that: The controller (19) comprises a humidity collection unit and a drying path decision unit, wherein the humidity collection unit is used to obtain comprehensive change data of grain humidity at the discharge port (18) of the elevator (2), and send the collected comprehensive change data of grain humidity to the drying path decision unit; The comprehensive change data of grain humidity include the floating value of internal and external air humidity, the average number of suspended impurities and the temperature difference between internal and external air; The drying path decision unit is used to set the grain humidity monitoring cycle in the drying box (1), and to process the acquired grain humidity comprehensive change data in a formulaic manner, to generate a corresponding discharge signal to control the powered equipment in the drying box (1), and to change the grain discharge position in the drying box (1).

9. A progressive multi-channel feeding and discharging grain dryer according to claim 8, characterized in that: The progressive multi-channel feeding and discharging grain drying method is as follows: A monitoring cycle is set, and the humidity change data of the grain discharged from the discharge port (18) of the elevator (2) is obtained through the front-end sensor in the controller (19), and the gas with a temperature of 55-60° C. is discharged from the side of the blower (3) in advance to preheat the ventilation pipe (6) in the drying box (1); The concentrated grains flow down gradually along the top of the drying box (1), continuously contact the preheated ventilation pipe (6), and are finally discharged from the bottom of the drying box (1) and return to the elevator (2) for circulating discharge. At the same time, according to the grain moisture change data obtained by the controller (19), when the grain reaches the drying threshold, the grain is prevented from being over-dried. The motor in the sleeve (4) drives the rotating sleeve (806) on the triangular cylinder (801) to rotate 180 degrees. At the same time, the cylinder (14) pushes the baffle plate (13) to squeeze the movable shaft (803) to slide, causing the baffle (802) on the triangular cylinder (801) to rise. The grain in the drying box (1) enters the triangular cylinder (801) and the triangular cylinder (16), and is discharged into the receiving channel (5) through the rotating coiling blade rod (807).

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