Movable grain drying equipment

Abstract

The invention provides movable grain drying equipment, and relates to the technical field of grain drying, the movable grain drying equipment comprises a movable chassis, a hot blast stove is mounted on the movable chassis, the hot blast stove is connected with a hot air box, a drying cylinder is mounted on the hot air box, the drying cylinder is connected with a conveying mechanism, and one end of the conveying mechanism is communicated with the lower end of the drying cylinder; a grain outlet is formed in the other end of the conveying mechanism; an air inlet and an air outlet are formed in the side wall of the drying cylinder, the air inlet is located in the lower portion of the drying cylinder and communicates the drying cylinder with the hot air box, and the air outlet is located in the upper portion of the drying cylinder and communicates the drying cylinder with the outside; multiple layers of sieve plates are installed in the drying cylinder, sieve holes are formed in the plate faces of the sieve plates, a scraper is correspondingly installed above each sieve plate and connected with a rotating shaft, the upper end of the rotating shaft is connected with a first motor, the first motor is fixed to the top of the drying cylinder, and a grain inlet allowing grain to enter is further formed in the top of the drying cylinder. The technical problems that in the prior art, during grain drying, energy consumption is large, and the crack ratio is high are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of grain drying, and particularly to a mobile grain drying device. Background Art

[0002] During the process of grain production, if the water content of the harvested grain is too high, it is extremely prone to mildew and deterioration, seriously affecting the quality and storage period of the grain. In order to ensure the safe storage of grain and maintain good quality, it is an essential key link to carry out drying treatment on the grain before putting it into the granary.

[0003] Currently, in the main grain-producing areas, due to the large output and insufficient drying sites, grain drying equipment is usually used to dry grain in the prior art. For example, the Chinese utility model patent with the publication number CN221882104U discloses a combined solid heat storage drying furnace, which includes a drying furnace body and a drying device. Inside the drying furnace body, there is a columnar drying chamber, and through holes are distributed around the drying chamber, and these through holes are connected to the ventilation chamber outside. The drying chamber is connected to the drying device through a hot air pipe. During the drying operation, the grain directly falls from the top of the drying furnace body to the bottom. At the same time, the fan is started to extract hot air, and the hot air is sent to the ventilation chamber and then enters the drying chamber to circulate quickly. During this process, the drying device quickly generates heat, and the fan continuously sends hot air into the drying cylinder body, so that the hot air fully contacts the falling grain, thereby realizing the drying of the grain. This drying method can complete the grain drying task to a certain extent and has a relatively high drying efficiency.

[0004] However, there are at least the following defects in the above prior art. Since there is no interference during the process of the grain falling from the top to the bottom of the drying furnace, the falling speed is relatively fast. In order to achieve an ideal drying effect, the drying device needs to quickly generate heat. This results in too fast a heat circulation speed in the drying cylinder body, a significant increase in energy consumption. Moreover, the too fast heat circulation and the process of the grain being quickly heated cause a significant increase in the case of the grain bursting at the waist. Summary of the Invention

[0005] By providing a mobile grain drying device in the embodiments of the present application, the technical problems of high energy consumption and high bursting rate during grain drying in the prior art are solved.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions. A mobile grain drying device includes a mobile chassis, on which a hot blast stove is installed. The air outlet pipe of the hot blast stove is connected to a hot air box, and above the hot air box, a drying cylinder is installed. The drying cylinder is connected to a conveying mechanism. One end of the conveying mechanism is located inside the hot air box and communicates with the lower end of the drying cylinder, and the other end of the conveying mechanism is located outside the hot air box and is provided with a grain outlet; on the side wall of the drying cylinder, there are an air inlet and an air outlet. The air inlet is located at the lower part of the drying cylinder and connects the drying cylinder with the hot air box, and the air outlet is located at the upper part of the drying cylinder and connects the drying cylinder with the outside; inside the drying cylinder, at least three layers of sieve plates are installed. The plate surface of the sieve plate is penetrated with sieve holes. Above each sieve plate, a scraper is correspondingly installed. The scraper is connected to a rotating shaft, and the upper end of the rotating shaft is connected to a first motor, and the first motor is fixed to the top of the drying cylinder. At the top of the drying cylinder, there is also a grain inlet for grains to enter.

[0007] This device is provided with at least three layers of sieve plates, and above each layer of sieve plate, a scraper connected to the rotating shaft is installed. During operation, grains enter from the grain inlet and fall on the topmost sieve plate. The scraper rotates under the drive of the rotating shaft, causing the grains to slowly fall through the sieve holes to the lower sieve plate. At the same time, the hot air generated by the hot blast stove enters from the air inlet at the lower part of the drying cylinder through the hot air box and flows upward in the drying cylinder, drying the grains on the sieve plates. Due to the synergistic effect of the sieve plates and the scrapers, the falling speed of the grains in the drying cylinder slows down. In this way, through the slow heat circulation, the drying requirements of the grains can be met, avoiding the large amount of energy consumption caused by the rapid heat circulation in the drying cylinder, realizing the effective utilization of energy, and reducing the energy consumption; on the other hand, the slow heat circulation and the uniform heating process reduce the situation of grains bursting at the waist due to rapid heating, thereby reducing the bursting rate of grains and ensuring the quality of grains.

[0008] As a further improvement of the above solution, both the air inlet and the air outlet are provided with multiple ones, and the multiple air inlets and the multiple air outlets are respectively arranged in a circumferential array; thus, the hot air distribution in the drying cylinder is more uniform, the grains can be heated more evenly, avoiding the situation of local overheating, further reducing the bursting rate of grains, and at the same time improving the drying effect and quality, making the quality of the dried grains better.

[0009] As a further improvement of the above solution, the drying cylinder includes a lower cylinder body, the outer periphery of the lower cylinder body is fixed to the top of the hot air box, the upper end of the lower cylinder body is connected to an upper cylinder body, the lower end of the upper cylinder body is fixed to the lower cylinder body through a flange connection, and the upper end of the upper cylinder body is fixed with a cover plate through a flange connection. The top surface of the cover plate is fixed to the first motor; thus, when the device needs to be overhauled and maintained, the upper cylinder body can be conveniently disassembled, facilitating the inspection, repair or replacement of the components inside the drying cylinder, reducing the maintenance difficulty and cost of the device, and improving the service life and operation reliability of the device.

[0010] As a further improvement of the above solution, a speed reducer is also fixed on the top surface of the cover plate. The input end of the speed reducer is connected to the output end of the first motor, and the output end of the speed reducer is connected to the rotating shaft. The high-speed rotation output by the first motor is transmitted to the rotating shaft after being decelerated by the speed reducer, increasing the torque of the rotating shaft, which is beneficial to the more uniform spreading of the grain on the surface of the sieve plate under the action of the scraper.

[0011] As a further improvement of the above solution, the sieve plate is circular, and the outer periphery of the sieve plate is attached to and fixed to the inner wall of the drying cylinder; this can facilitate the installation and fixation of the sieve plate in the drying cylinder.

[0012] As a further improvement of the above solution, the scraper is strip-shaped, and a sleeve is provided at the central position in the length direction of the scraper. The sleeve is key-connected to the rotating shaft; the planes of the upper and lower adjacent layers of scrapers are vertically crossed; thus, the detachable installation of the scraper can be realized through the sleeve, which is convenient for equipment assembly and maintenance; at the same time, the vertical crossing of the planes of the upper and lower adjacent scrapers makes it so that after the grain on the upper sieve plate falls to the lower sieve plate, the lower scraper does not immediately contact the grain, making the resistance couple received by the rotating shaft more uniform and improving the operating stability of the equipment.

[0013] As a further improvement of the above solution, scraping teeth are installed on the lower edge of the scraper. The scraping teeth are strip-shaped and include a row of inclined tooth pieces, and a passage for the grain to pass through is formed between adjacent tooth pieces; thus, when the scraper rotates, the inclined tooth pieces can push the grain on the sieve plate to move, enabling it to smoothly fall to the lower sieve plate, and at the same time, the grain can pass through the passage between the tooth pieces, reducing the resistance received during the rotation of the scraper.

[0014] As a further improvement of the above solution, the scraping teeth also include tooth roots. The bottom of the tooth root is fixed to the top of the tooth piece, and a strip-shaped groove extending along its length direction is provided at the top of the tooth root. The strip-shaped groove is in sliding fit with the lower edge of the scraper; thus, the scraping teeth can be detachably installed and fixed on the scraper. When the scraping teeth are worn and need to be replaced, there is no need to replace the entire scraper, and only the scraping teeth need to be replaced, reducing the maintenance cost of the equipment.

[0015] As a further improvement of the above solution, the conveying mechanism includes a round pipe. A screw conveyor is installed inside the round pipe. One end of the round pipe is fixed to the lower end of the drying cylinder through a flange connection. The other end of the round pipe is fixed with a support pipe. A support plate is fixed outside the support pipe. A second motor is installed on one side of the support plate. The output end of the second motor passes through the support plate and is connected to a sprocket A. The sprocket A is connected to a sprocket B through a chain. The sprocket B is fixed to one end of the screw conveyor; thus, the dried grain in the drying cylinder can be stably and efficiently conveyed to the grain outlet, ensuring the smooth progress of the entire grain drying process.

[0016] As a further improvement of the above solution, a hook is fixed to one end of the mobile chassis; the equipment can be connected to a vehicle through the hook, realizing the convenient transportation of the equipment and improving the mobility of the equipment.

[0017] As can be seen from the above technical solutions, the present invention has at least the following technical effects or advantages: Since at least three layers of sieve plates with sieve holes are installed inside the drying cylinder, and a scraper connected to the rotating shaft is correspondingly installed above each sieve plate, hot air enters through the lower air inlet of the drying cylinder from the hot air box and flows upward in the drying cylinder. Therefore, the grains in the drying cylinder fall from the upper sieve plate to the lower sieve plate under the action of the scraper. During this process, the grains can fully contact the hot air, and only slow heat circulation is required to achieve the drying of the grains, avoiding energy waste caused by rapid heat circulation and reducing energy consumption. At the same time, this slow and uniform heating method greatly reduces the occurrence of cracked grains due to uneven or excessive heating of the grains, reduces the cracking rate of the grains, and ensures the quality of the grains. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts: Figure 1 is a schematic structural diagram of the whole of the present invention; Figure 2 is a three-dimensional structural diagram of the present invention; Figure 3 is Figure 2 a schematic structural diagram of the hidden part of the drying cylinder in Figure 4 is Figure 3 a partial enlarged schematic diagram of part A in Figure 5 is Figure 3 a partial enlarged schematic diagram of part B in Figure 6 is a schematic structural diagram of the connection between the conveying mechanism and the bottom of the drying cylinder.

[0018] Description of the reference numerals: 1, mobile chassis, 101, hook, 2, hot blast stove, 201, air outlet pipe, 3, hot air box, 4, drying cylinder, 401, lower cylinder body, 402, upper cylinder body, 403, cover plate, 5, air inlet, 6, air outlet, 7, sieve plate, 8, scraper, 801, sleeve, 9, scraping teeth, 901, tooth piece, 902, tooth root, 10, rotating shaft, 11, first motor, 12, grain inlet, 13, reducer, 14, round pipe, 15, auger, 16, support plate, 17, second motor, 18, sprocket A, 19, chain, 20, sprocket B, 21, support pipe, 22, grain outlet. DETAILED DESCRIPTION OF THE INVENTION To enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in this patent, other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent.

[0019] The present invention discloses a mobile grain drying device, as Figure 1 shown, which includes a mobile chassis 1. A hot blast stove 2 is installed on the mobile chassis 1. The air outlet pipe 201 of the hot blast stove 2 is connected to a hot air box 3. A drying cylinder 4 is installed above the hot air box 3. The drying cylinder 4 is connected to a conveying mechanism. One end of the conveying mechanism is located inside the hot air box 3 and communicates with the lower end of the drying cylinder 4, and the other end of the conveying mechanism is located outside the hot air box 3 and is provided with a grain outlet 22; an air inlet 5 and an air outlet 6 are provided on the side wall of the drying cylinder 4. The air inlet 5 is located at the lower part of the drying cylinder 4 and communicates the drying cylinder 4 with the hot air box 3, and the air outlet 6 is located at the upper part of the drying cylinder 4 and communicates the drying cylinder 4 with the outside; at least three layers of sieve plates 7 are installed inside the drying cylinder 4. Sieve holes penetrate through the plate surface of the sieve plate 7. A scraper 8 is correspondingly installed above each sieve plate 7. The scraper 8 is connected to a rotating shaft 10. The upper end of the rotating shaft 10 is connected to a first motor 11. The first motor 11 is fixed to the top of the drying cylinder 4. A grain inlet 12 for grains to enter is also provided at the top of the drying cylinder 4.

[0020] In this embodiment, the mobile chassis 1 is a mobile chassis structure with wheels, which can provide a basis for the movement of the device, so as to transfer at different sites. A hook 101 is also fixed at one end of the mobile chassis 1. The hook 101 can be connected to the traction device of the vehicle, which is convenient to connect the device to the vehicle for transportation, thereby improving the mobility of the device. The hot blast stove 2 is installed on the mobile chassis 1 and is used to generate hot air during operation. The hot air is conveyed into the hot air box 3 through the air outlet pipe 201. The hot air box 3 plays a role of temporarily storing and buffering the hot air, so that the hot air can enter the drying cylinder 4 more evenly. The drying cylinder 4 is vertically placed. The air inlet 5 at its lower part communicates with the hot air box 3, and the air outlet 6 at its upper part communicates with the external environment, forming a circulation channel for the hot air. The sieve plates 7 inside the drying cylinder 4 are horizontally arranged, and there is a certain interval between each layer of sieve plates 7, which is convenient for the transfer of grains between different sieve plates.

[0021] During actual operation, place the device in a suitable position and connect the power supply. Add the grains to be dried through the grain inlet 12, and the grains first fall on the topmost sieve plate 7. Start the first motor 11, and the scraper 8 begins to rotate driven by the rotating shaft 10. The scraper 8 scrapes the grains on the sieve plate 7, causing the grains to gradually fall through the sieve holes of the upper sieve plate 7 onto the lower sieve plate 7. At the same time, the hot air generated by the hot blast stove 2 enters the hot air box 3. After the hot air accumulates in the hot air box 3, it enters the drying cylinder 4 from the air inlet 5. The hot air in the drying cylinder 4 flows from bottom to top, and when passing through the sieve plate 7, it dries the grains on the sieve plate 7. As the grains are transferred between different sieve plates 7 and continuously dried by the hot air until the drying process is completed. Finally, the dried grains are discharged from the grain outlet 22 through the conveying mechanism.

[0022] In the above structure, by arranging multiple sieve plates 7 and scrapers 8, the grains fall slowly in the drying cylinder 4, and the grains can be dried by using the slow heat cycle, reducing energy consumption and the cracking rate; at the same time, this structure can make the hot air contact the grains more fully, improving the drying effect.

[0023] In the specific structure of the drying cylinder 4, multiple air inlets 5 and air outlets 6 are provided. The multiple air inlets 5 and multiple air outlets 6 are respectively arranged in a circumferential array. In this embodiment, the multiple air inlets 5 are evenly distributed along the lower circumference of the drying cylinder 4, and the multiple air outlets 6 are evenly distributed along the upper circumference of the drying cylinder 4. This layout of the air inlets 5 and air outlets 6 enables the hot air to enter the drying cylinder 4 more evenly, and the distribution of the hot air in the drying cylinder 4 is more uniform, avoiding local overheating or insufficient drying; thereby further reducing the cracking rate and ensuring the quality of the dried grains.

[0024] Specifically, as shown in Figure 1 、 Figure 2 , the drying cylinder 4 includes a lower cylinder body 401. The outer periphery of the lower cylinder body 401 is fixed to the top of the hot air box 3. The upper end of the lower cylinder body 401 is connected to an upper cylinder body 402. The lower end of the upper cylinder body 402 is fixed to the lower cylinder body 401 through a flange connection. The upper end of the upper cylinder body 402 is fixedly connected with a cover plate 403 through a flange connection, and the top surface of the cover plate 403 is fixed to the first motor 11.

[0025] In this embodiment, there are hole positions on the top of the hot air box 3 for installing the lower cylinder body 401. The outer periphery of the lower cylinder body 401 is fixed to the top of the hot air box 3 by welding to ensure firm connection. The bottom of the upper cylinder body 402 and the top of the lower cylinder body 401 are connected by a flange to facilitate disassembly and installation. In this way, when the equipment needs to be overhauled and maintained, the upper cylinder body 402 can be disassembled to check, repair or replace components inside the drying cylinder 4. Thus, the maintenance cost of the equipment can be reduced, and further the service life and operation reliability of the equipment can be improved.

[0026] More specifically, a speed reducer 13 is also fixed on the top surface of the cover plate 403. The input end of the speed reducer 13 is connected to the output end of the first motor 11, and the output end of the speed reducer 13 is connected to the rotating shaft 10. In this embodiment, the speed reducer 13 is fixedly installed on the top surface of the cover plate 403 by means of bolt connection. The input shaft of the speed reducer 13 is coaxially connected to the first motor 11 and the rotating shaft 10. When the device works, the high-speed rotation output by the first motor 11 is decelerated by the speed reducer 13 and then transmitted to the rotating shaft 10. By reducing the speed of the rotating shaft 10 through the speed reducer 13, it is ensured that the grains are spread more evenly on the surface of the sieve plate 7 under the action of the scraper 8, avoiding uneven distribution of grains caused by too fast speed, thereby improving the uniformity of drying. At the same time, the speed reducer 13 can increase the torque of the rotating shaft 10 and improve the stability of the device.

[0027] Inside the drying cylinder 4, in combination with Figure 1 、 Figure 3 As shown, the specific structure of the sieve plate 7 is circular, and the outer periphery of the sieve plate 7 is attached to and fixed to the inner wall of the drying cylinder 4. In this embodiment, the diameter of the circular sieve plate 7 is adapted to the inner diameter of the drying cylinder 4, and the outer periphery of the sieve plate 7 can be fixed to the inner wall of the drying cylinder 4 by means of welding, bolt connection or clamping. This circular structure of the sieve plate 7 enables its installation to be more convenient, improves the efficiency of equipment assembly, and at the same time facilitates the fitting of its outer periphery to the inner wall of the drying cylinder 4, effectively preventing grains from accumulating in the gap between the sieve plate and the inner wall of the drying cylinder, ensuring the smooth progress of the drying process.

[0028] In the specific structure of the scraper 8, as Figure 3 shown, the scraper 8 is strip-shaped, and a sleeve 801 is provided at the central position in the length direction of the scraper 8. The sleeve 801 is key-connected to the rotating shaft 10; the planes of the upper and lower adjacent layers of the scraper 8 are vertically crossed. In this embodiment, the strip-shaped scraper 8 is sleeved on the rotating shaft 10 through the sleeve 801 at the central position. Key grooves are provided on the inner wall of the sleeve 801 and the outside of the rotating shaft 10. Thus, the fixation of the sleeve 801 and the rotating shaft 10 can be achieved through key connection, enabling the scraper 8 to rotate synchronously with the rotating shaft 10. Since the sleeve 801 and the rotating shaft 10 are key-connected, during installation, the sieve plate 7 can be first fixed inside the drying cylinder 4, and then the scraper 8 can be installed on the rotating shaft 10 through the sleeve 801. On the other hand, the planes of the upper and lower adjacent layers of the scraper 8 are vertically crossed. When the grains on the upper sieve plate 7 fall to the lower sieve plate 7, the scraper 8 on the lower sieve plate 7 will not immediately contact the grains. This structure not only facilitates equipment assembly and maintenance, but also makes the resistance couple received by the rotating shaft 10 more uniform, is conducive to the stable operation of the equipment, reduces vibration and noise during equipment operation, and extends the service life of the equipment.

[0029] More specifically, in combination with Figure 4 、 Figure 5As shown, scraping teeth 9 are installed on the lower edge of the scraper 8. The scraping teeth 9 are strip-shaped and include a row of inclined tooth pieces 901. Channels for grains to pass through are formed between adjacent tooth pieces 901. In this embodiment, the scraping teeth 9 are fixedly installed on the lower edge of the scraper 8. The inclined tooth pieces 901 contact the grains on the sieve plate 7. When the scraper 8 rotates, the tooth pieces 901 can push the grain particles to move on the sieve plate 7, enabling the grains to fall through the sieve holes to the lower sieve plate 7. At the same time, the grains on the sieve plate 7 can pass through the channels between adjacent tooth pieces 901, reducing the resistance received when the scraper 8 rotates. This design of the scraping teeth 9 can effectively promote the movement of grains on the sieve plate 7, improve the drying efficiency, reduce the rotation resistance of the scraper 8, lower the energy consumption, and improve the operating efficiency of the equipment.

[0030] Furthermore, the scraping teeth 9 further include tooth roots 902. The bottom of the tooth roots 902 is fixed to the top of the tooth pieces 901. A strip-shaped groove extending along its length direction is provided at the top of the tooth roots 902. The strip-shaped groove is slidably engaged with the lower edge of the scraper 8. In this embodiment, the tooth roots 902 can fixedly connect the tooth pieces 901 to the scraper 8. Through the sliding fit between the strip-shaped groove at the top of the tooth roots 902 and the lower edge of the scraper 8, the disassembly and assembly of the scraping teeth 9 on the scraper 8 can be realized. When the scraping teeth 9 are worn and need to be replaced, the scraping teeth 9 can be slid out of the scraper 8 along the strip-shaped groove. This structure facilitates the replacement of the scraping teeth 9, reduces the maintenance cost of the equipment, ensures the continuous and efficient operation of the equipment, and avoids affecting the grain drying effect and efficiency due to the wear of the scraping teeth.

[0031] On the other hand, in the specific structure of the conveying mechanism, as Figure 6 shown, the conveying mechanism includes a round tube 14. A screw conveyor 15 is installed inside the round tube 14. One end of the round tube 14 is fixedly connected to the lower end of the drying cylinder 4 through a flange connection. A support tube 21 is fixed to the other end of the round tube 14. A support plate 16 is fixed to the outside of the support tube 21. A second motor 17 is installed on one side of the support plate 16. The output end of the second motor 17 penetrates through the support plate 16 and is connected to a sprocket A 18. The sprocket A 18 is connected to a sprocket B 20 through a chain 19. The sprocket B 20 is fixed to one end of the screw conveyor 15.

[0032] In this embodiment, the round tube 14 can provide a channel for the conveyance of grains. The screw conveyor 15 is installed inside the round tube 14, and the conveyance of grains is realized through rotation. One end of the round tube 14 is connected to the lower end of the drying cylinder 4 through a flange, ensuring the sealing and stability of the connection. The support tube 21 and the support plate 16 can provide installation support for the second motor 17. After the second motor 17 is started, it can drive the sprocket A 18 to rotate. The sprocket A 18 drives the sprocket B 20 to rotate through the chain 19, and then makes the screw conveyor 15 rotate, conveying the dried grains in the round tube 14 to the grain outlet 22. This structure of the conveying mechanism can convey the dried grains out, improve the working efficiency of the entire equipment, and meet the requirements of grain drying production.

[0033] The working process of this device is as follows: After the grains to be dried are added through the grain inlet 12 at the top of the drying cylinder 4, they first fall on the topmost sieve plate 7. After starting the first motor 11, the rotating shaft 10 drives the scraper plates 8 on each layer to rotate synchronously at a relatively low speed under the regulation of the reducer 13. The inclined scraping teeth 9 at the lower edge of each scraper plate 8 are in contact with the surface of the sieve plate 7. During the rotation process, the tooth pieces 901 of the scraping teeth 9 push the grain particles to be evenly spread along the surface of the sieve plate 7. Since the sieve plate 7 is densely covered with sieve holes, the upper-layer grains gradually pass through the sieve holes under the continuous pushing of the scraper plates 8 and fall layer by layer to the next lower sieve plate 7. During this process, the hot air generated by the hot blast stove 2 enters the hot air box 3 through the air outlet pipe 201 for temporary storage and buffering, and then evenly enters the cylinder through a plurality of air inlets 5 distributed in a circumferential array at the lower part of the drying cylinder 4. The hot air flows upward, passes through the grain gaps on each sieve plate 7, conducts sufficient heat exchange with the grains, takes away the moisture and realizes drying. The humid hot air after the heat exchange finally discharges to the external environment through a plurality of air outlets 6 at the upper part of the drying cylinder 4. After at least three stages of drying step by step, the grains fall to the bottom of the drying cylinder 4 and are received by the auger 15 of the conveying mechanism. The auger 15 drives by the second motor 17 horizontally conveys the dried grains along the round pipe 14 to the grain outlet 22 outside the hot air box 3 to complete the discharging.

[0034] During the whole process, the setting of the sieve plate belt 7 can ensure the residence time of the grains in the drying cylinder 4, reduce the requirement for the hot air circulation speed, thereby reducing the energy consumption; at the same time, the flow path of the grains passes through multiple sieve plates 7, which can effectively avoid local overheating and control the cracking rate of the grains. On the other hand, since the hot air does not need a fast circulation speed in the drying cylinder 4, the hot blast stove 2 can adopt a biomass stove. Thus, the originally discarded crop straw can be converted into the fuel of the hot blast stove, realizing the efficient utilization of biomass resources and reducing the waste of resources.

[0035] In the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for describing the present invention rather than requiring the present invention to be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The "connected" and "connection" in the present invention should be understood in a broad sense. For example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific situation.

[0036] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in its embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mobile grain drying equipment, comprising a mobile chassis (1), on which a hot blast stove (2) is installed, characterized in that, The air outlet pipe (201) of the hot blast stove (2) is connected to a hot air box (3). Above the hot air box (3), a drying cylinder (4) is installed. The drying cylinder (4) is connected to a conveying mechanism. One end of the conveying mechanism is located inside the hot air box (3) and communicates with the lower end of the drying cylinder (4), and the other end of the conveying mechanism is located outside the hot air box (3) and is provided with a grain outlet (22). The side wall of the drying cylinder (4) is provided with an air inlet (5) and an air outlet (6). The air inlet (5) is located at the lower part of the drying cylinder (4) and communicates the drying cylinder (4) with the hot air box (3). The air outlet (6) is located at the upper part of the drying cylinder (4) and communicates the drying cylinder (4) with the outside. At least three layers of sieve plates (7) are installed inside the drying cylinder (4). Sieve holes penetrate through the plate surface of the sieve plate (7). Above each sieve plate (7), a scraper (8) is correspondingly installed. The scraper (8) is connected to a rotating shaft (10). The upper end of the rotating shaft (10) is connected to a first motor (11). The first motor (11) is fixed to the top of the drying cylinder (4). The top of the drying cylinder (4) is also provided with a grain inlet (12) for grains to enter.

2. The mobile grain drying equipment according to claim 1, characterized in that, Both the air inlet (5) and the air outlet (6) are provided with a plurality of them. The plurality of air inlets (5) and the plurality of air outlets (6) are respectively arranged in a circumferential array.

3. A mobile grain drying device according to claim 2, characterized in that, The drying cylinder (4) includes a lower cylinder body (401). The outer periphery of the lower cylinder body (401) is fixed to the top of the hot air box (3). The upper end of the lower cylinder body (401) is connected to an upper cylinder body (402). The lower end of the upper cylinder body (402) is fixed to the lower cylinder body (401) through a flange connection. The upper end of the upper cylinder body (402) is fixed with a cover plate (403) through a flange connection. The top surface of the cover plate (403) is fixed to the first motor (11).

4. A mobile grain drying equipment according to claim 3, characterized in that, The top surface of the cover plate (403) is also fixed with a reducer (13). The input end of the reducer (13) is connected to the output end of the first motor (11), and the output end of the reducer (13) is connected to the rotating shaft (10).

5. A mobile grain drying equipment according to any one of claims 1 to 4, characterized in that, The sieve plate (7) is circular, and the outer periphery of the sieve plate (7) is attached to and fixed to the inner wall of the drying cylinder (4).

6. A mobile grain drying equipment according to claim 5, characterized in that, The scraper (8) is strip-shaped. A sleeve (801) is provided at the central position in the length direction of the scraper (8). The sleeve (801) is key-connected to the rotating shaft (10). The planes where the upper and lower adjacent layers of scrapers (8) are located are vertically crossed.

7. A mobile grain drying device according to claim 6, characterized in that, Scraper teeth (9) are installed at the lower edge of the scraper (8). The scraper teeth (9) are strip-shaped and include a row of inclined tooth pieces (901). Channels for grains to pass through are formed between adjacent tooth pieces (901).

8. A mobile grain drying equipment according to claim 7, characterized in that, The scraper teeth (9) also include tooth roots (902). The bottom of the tooth roots (902) is fixed to the top of the tooth pieces (901). A strip-shaped groove extending along its length direction is provided at the top of the tooth roots (902). The strip-shaped groove is in sliding fit with the lower edge of the scraper (8).

9. A mobile grain drying equipment according to any one of claims 1 to 4, characterized in that The conveying mechanism includes a round tube (14), a screw conveyor (15) is installed inside the round tube (14), one end of the round tube (14) is fixed to the lower end of the drying cylinder (4) through a flange connection, the other end of the round tube (14) is fixed with a support tube (21), a support plate (16) is fixed to the outside of the support tube (21), a second motor (17) is installed on one side of the support plate (16), the output end of the second motor (17) passes through the support plate (16) and then is connected with a sprocket A (18), the sprocket A (18) is connected with a sprocket B (20) through a chain (19), and the sprocket B (20) is fixed to one end of the screw conveyor (15).

10. A mobile grain drying equipment according to any one of claims 1 to 4, characterized in that, A hook (101) is fixed to one end of the mobile chassis (1).

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