Hot air circulation device for drying grains

Abstract

The utility model discloses a hot air circulation device for drying grain, which relates to the technical field of grain drying and comprises a drying cylinder, a top cover is inserted into the upper end of the drying cylinder, a jacking mechanism is fixedly mounted on the outer side of the top cover, and an air return pipe is fixedly mounted at the upper end of the top cover. A hot-air blower and a filtering device are fixedly installed on the back face of the drying cylinder, a mounting frame is fixedly installed at the upper end of the top cover, an adapter pipe is fixedly installed on the inner side of the mounting frame, an air guide pipe is rotationally connected to the inner side of the top cover, and exhaust pipes are welded to the outer side of the air guide pipe at equal angles. By the adoption of the structure, the second bevel gear connected with the output end of the driving motor is in meshing transmission with the first bevel gear, so that the air guide pipe rotates on the top cover, and the multiple sets of air exhaust pipes connected with the lower end of the air guide pipe can stir in the drying cylinder with grains; and meanwhile, the exhaust pipe can release hot air to uniformly dry the grains in the drying cylinder.

Description

Technical Field

[0001] The utility model belongs to the technical field of grain drying, and particularly relates to a hot air circulation device for drying grain. Background Art

[0002] Mechanized grain drying is an important means to improve grain quality and reduce grain loss. At present, the drying equipment for bulk grain crops, such as corn and rice, all adopt an open-loop structure of hot air furnace plus drying tower. The hot air is discharged out of the machine after being used once, and most of the heat is discharged into the atmosphere with the hot air. There are generally problems of high energy consumption and low thermal efficiency, resulting in high drying costs, especially the use of hot air furnaces that burn fossil energy, which wastes energy seriously and seriously affects environmental safety. Therefore, realizing the recycling of hot air and improving the utilization rate of hot air is the main direction to improve drying efficiency.

[0003] A Chinese patent with announcement number CN212512130U discloses a hot air closed-cycle grain dryer, which includes a hot air furnace, a drying tower, a settling chamber and a heat exchange chamber connected in sequence. The air outlet of the hot air furnace is connected to the air inlet of a blower, and the air outlet of the blower is connected to the drying tower; the air outlet of the heat exchange chamber is connected to the air inlet of the hot air furnace through a hot air duct to form a closed loop.

[0004] During the actual use of the above-mentioned grain drying hot air circulation device in the prior art, we found that there are still certain shortcomings. For example, the hot air blower connects the hot air to the wind collecting hood on the drying sleeve through a pipe, and the hot air enters the drying tower filled with grain to dry the grain. In this process, the outer periphery of the drying tower caters to the wind collecting hood, so the grain can be dried quickly, while the grain located in the middle part of the drying tower cannot be dried evenly, which affects the uniformity and drying effect of the grain drying. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of the utility model is to provide a hot air circulation device for drying grains to solve the problems mentioned in the background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A hot air circulation device for drying grains comprises a drying cylinder, a top cover is plugged into the upper end of the drying cylinder, a lifting mechanism is fixedly installed on the outer side of the top cover, a return air duct is fixedly installed on the upper end of the top cover, a hot air blower and a filter device are fixedly installed on the back of the drying cylinder respectively, a mounting frame is fixedly installed on the upper end of the top cover, a switching pipe is fixedly installed on the inner side of the mounting frame, an air guide pipe is rotatably connected to the inner side of the top cover, an exhaust pipe is welded at equal angles on the outer side of the air guide pipe, an output end of the hot air blower is fixedly installed through a hose and the upper end of the switching pipe, a lower end of the switching pipe is rotatably connected to the inner side of the air guide pipe, an upper end of the return air duct is fixedly installed through a hose and an air inlet of the filter device, an air outlet of the filter device is fixedly installed through a pipeline and an input end of the hot air blower, a linkage mechanism is fixedly installed on the outer side of the air guide pipe, and a discharge pipe with a cover is provided at the lower end of the drying cylinder;

[0008] The linkage mechanism includes a first bevel gear, which is fixedly mounted on the outside of the air duct, a mounting seat is fixedly mounted on one side of the mounting frame, a driving motor is fixedly mounted on the upper end of the mounting seat, an output end of the driving motor is movably extended into the inside of the mounting frame, and a second bevel gear is fixedly mounted thereon, the first bevel gear and the second bevel gear are meshingly connected, and the air duct can be rotated in the drying cylinder filled with grain through the linkage mechanism;

[0009] The exhaust pipe includes a pipe body, one end of which is welded to the outer wall of the lower end of the air guide pipe, an exhaust hole is opened on the outer side of the pipe body, a mesh cover is sleeved on the outer side of the pipe body, and the mesh cover covers the opening of the exhaust hole. An end cap is threadedly installed on one end of the pipe body away from the exhaust pipe. Through the exhaust pipe, stirring, air outlet and drying can be satisfied. When some grain debris enters the pipe body, the pipe body can be cleaned regularly.

[0010] The lifting mechanism includes a first assembly plate and a second assembly plate. The first assembly plate is symmetrically fixedly connected to the outside of the top cover, and the second assembly plate is symmetrically fixedly connected to the outside of the drying cylinder. A cylinder is symmetrically fixedly installed on the upper end of the second assembly plate, and the output end of the cylinder and the lower end of the first assembly plate are fixedly installed. Through the lifting mechanism, the top cover can be easily pushed up, which further facilitates the maintenance of the exhaust duct.

[0011] As a preferred technical solution, a reinforcement seat is fixedly installed on the outer side of the drying cylinder, and the upper end of the reinforcement seat and the lower end of the second assembly plate are fixedly installed. The reinforcement seat can improve the supporting force and stability of the second assembly plate.

[0012] As an optimal technical solution, a fixing seat is fixedly connected to the outer side of the transfer tube, and the fixing seat is fixed to the upper end of the mounting frame by screws. The lower end of the transfer tube movably passes through the frame wall of the mounting frame. A sealing bearing is provided on the inner side of the upper end of the air guide duct, and the air guide duct is rotatably connected to the outer wall of the lower end of the transfer tube through the sealing bearing. The transfer tube can be easily installed through the fixing seat, and the sealing bearing can facilitate the rotation of the air guide duct at the lower end of the transfer tube while ensuring the sealing of the hot air transportation.

[0013] As a preferred technical solution, a through hole is opened on the inner side of the mounting frame, and the output end of the driving motor movably passes through the through hole. A rubber gasket is sleeved on the outer side of the end cover. The rubber gasket is movably connected to the end of the tube body away from the air duct. The output end of the driving motor can be conveniently passed through the mounting frame through the through hole on the inner side of the mounting frame, and the stability of the installation of the end cover on the tube body can be guaranteed by the rubber gasket at the end cover.

[0014] In summary, the utility model mainly has the following beneficial effects:

[0015] First, the second bevel gear connected to the output end of the driving motor is meshed with the first bevel gear to drive the air duct to rotate on the top cover, and the multiple exhaust ducts connected to the lower end of the air duct can not only stir the drying drum with grain, but also release hot air to evenly dry the grain in the drying drum;

[0016] Secondly, by welding an inclined tube body on the air guide duct, when the debris in the grain enters the tube body, it gathers at one end of the tube body close to the end cover along the inclined direction. Therefore, it is convenient to dry and stir the grain, and the end cover on the tube body is also convenient to clean the residual debris entering the tube body. When the exhaust duct needs to be maintained, it is only necessary to use the cylinder output end on the second assembly plate to push the first assembly plate to drive the top cover to rise, which can facilitate the maintenance of the exhaust duct by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 The utility model Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 It is a schematic diagram of the right side structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the exhaust pipe structure of the utility model.

[0021] Figure numerals: 1. drying cylinder, 2. discharge pipe with cover, 3. top cover, 4. lifting mechanism, 401. first assembly plate, 402. cylinder, 403. second assembly plate, 5. return air duct, 6. air guide duct, 7. transfer tube, 8. mounting frame, 9. linkage mechanism, 901. first bevel gear, 902. drive motor, 903. mounting seat, 904. second bevel gear, 10. through hole, 11. fixing seat, 12. exhaust duct, 121. exhaust hole, 122. pipe body, 123. mesh cover, 124. end cover, 13. sealed bearing, 14. rubber gasket, 15. filter device, 16. hot air blower, 17. reinforcement seat. DETAILED DESCRIPTION

[0022] refer to Figures 1 to 4 The hot air circulation device for drying grains described in this embodiment comprises a drying cylinder 1, a top cover 3 is plugged into the upper end of the drying cylinder 1, a lifting mechanism 4 is fixedly installed on the outer side of the top cover 3, a return air duct 5 is fixedly installed on the upper end of the top cover 3, a hot air blower 16 and a filter device 15 are fixedly installed on the back of the drying cylinder 1, a mounting frame 8 is fixedly installed on the upper end of the top cover 3, a transfer tube 7 is fixedly installed on the inner side of the mounting frame 8, an air guide 6 is rotatably connected to the inner side of the top cover 3, an exhaust duct 12 is welded at equal angles on the outer side of the air guide 6, and the output end of the hot air blower 16 is connected to the hot air blower 16 through a hose and a transfer tube 7. The upper end of the pipe 7 is fixedly installed, and the lower end of the transfer pipe 7 is rotatably connected to the inner side of the air guide pipe 6. The upper end of the return air pipe 5 is fixedly installed through a hose and the air inlet of the filter device 15. The air outlet of the filter device 15 is fixedly installed through a pipeline and the input end of the hot air blower 16. A linkage mechanism 9 is fixedly installed on the outer side of the air guide pipe 6. A discharge pipe 2 with a cover is provided at the lower end of the drying cylinder 1. The filter device 15 is used to filter the dust and moisture carried in the circulating hot air. A sealing ring is also provided at the lower end of the top cover 3, which can be pressed against the upper end of the drying cylinder 1 after the lifting mechanism 4 sinks to achieve sealing.

[0023] The linkage mechanism 9 includes a first bevel gear 901, which is fixedly mounted on the outside of the air duct 6. A mounting seat 903 is fixedly mounted on one side of the mounting frame 8. A driving motor 902 is fixedly mounted on the upper end of the mounting seat 903. The output end of the driving motor 902 movably extends into the inner side of the mounting frame 8 and is fixedly mounted with a second bevel gear 904. The first bevel gear 901 and the second bevel gear 904 are meshedly connected. The hot air blower 16 is installed through a hose and an adapter at the output end, and the lower end of the adapter tube 7 is rotatably connected to the air duct 6 on the top cover 3. The second bevel gear 904 connected to the output end of the driving motor 902 is meshed and driven by the first bevel gear 901, so that the air duct 6 rotates on the top cover 3. The multiple groups of exhaust pipes 12 connected to the lower end of the air duct 6 can not only stir the drying drum 1 with grain, but also release hot air to evenly dry the grain in the drying drum 1.

[0024] The exhaust pipe 12 includes a pipe body 122, one end of which is welded to the outer wall of the lower end of the air guide pipe 6, an exhaust hole 121 is opened on the outer side of the pipe body 122, and a mesh cover 123 is sleeved on the outer side of the pipe body 122, and the mesh cover 123 covers the opening of the exhaust hole 121. An end cap 124 is threadedly installed at one end of the pipe body 122 away from the exhaust pipe 12. By welding the inclined pipe body 122 on the air guide pipe 6, when the debris in the grain enters the pipe body 122, it gathers at one end of the pipe body 122 close to the end cap 124 along the inclined direction, so that it is convenient to dry and stir the grain, and at the same time, the end cap 124 on the pipe body 122 is also convenient to enter the pipe body. 122 residual debris cleaned; when discharging, because the grain in the drying cylinder 1 is discharged and settled, there will be smaller debris penetrated into the tube body 122, so regular maintenance is necessary, the end of the tube body 122 away from the end cover 124 is also provided with a section of welding pipe, the welding pipe is not shown in the figure, the end of the welding pipe away from the tube body 122 is adapted to the arc surface of the outer wall of the air guide pipe 6, which is convenient for welding, and the welding of the outer wall of the air guide pipe 6 is also provided with a ventilation hole, and the ventilation hole can be used to realize the operation of the air guide pipe 6 to let air into the exhaust pipe 12; the lower end of the air guide pipe 6 is also provided with an openable cover, and the cover can be opened during maintenance to clean the debris blown into the air guide pipe 6;

[0025] The lifting mechanism 4 includes a first assembly plate 401 and a second assembly plate 403. The first assembly plate 401 is symmetrically fixedly connected to the outside of the top cover 3, and the second assembly plate 403 is symmetrically fixedly connected to the outside of the drying cylinder 1. The upper end of the second assembly plate 403 is symmetrically fixedly installed with a cylinder 402, and the output end of the cylinder 402 is fixedly installed with the lower end of the first assembly plate 401. When the exhaust duct 12 needs to be maintained, it is only necessary to use the output end of the cylinder 402 on the second assembly plate 403 to push the first assembly plate 401 to drive the top cover 3 to rise, which can facilitate the staff to maintain the exhaust duct 12.

[0026] refer to Figure 3 A reinforcement seat 17 is fixedly installed on the outer side of the drying cylinder 1, and the upper end of the reinforcement seat 17 and the lower end of the second assembly plate 403 are fixedly installed. The reinforcement seat 17 on the drying cylinder 1 can improve the supporting force and stability of the second assembly plate 403.

[0027] refer to Figure 2 The outer side of the adapter tube 7 is fixedly connected with a fixing seat 11, and the fixing seat 11 is fixedly installed on the upper end of the mounting frame 8 by screws. The lower end of the adapter tube 7 movably passes through the frame wall of the mounting frame 8. A sealed bearing 13 is provided on the inner side of the upper end of the air guide pipe 6. The air guide pipe 6 is rotatably connected to the outer wall of the lower end of the adapter tube 7 through the sealed bearing 13. The adapter tube 7 is conveniently fixed to the mounting frame 8 by screws through the fixing seat 11, and the sealed bearing 13 on the air guide pipe 6 can facilitate the rotatable connection between the air guide pipe 6 and the lower end of the adapter tube 7.

[0028] refer to Figure 2 and Figure 4 A through hole 10 is provided on the inner side of the mounting frame 8, and the output end of the driving motor 902 movably passes through the through hole 10. A rubber gasket 14 is sleeved on the outer side of the end cover 124, and the rubber gasket 14 is movably connected to the end of the tube body 122 away from the air duct 6. By using the output end of the driving motor 902 to movably pass through the through hole 10, the second bevel gear 904 at the output end of the driving motor 902 can be easily engaged with the first bevel gear 901 on the transmission air duct 6, and the rubber gasket 14 on the end cover 124 can play a certain tension role after the end cover 124 is tightened, thereby ensuring the stability of the installation of the end cover 124; the end of the end cover 124 away from the tube body 122 is also provided with a hexagonal groove, which can be tightened with a tool to prevent it from falling off during use.

[0029] Principle and advantages of use: When in use, the hot air blower 16 is installed through the hose and adapter at the output end, and the lower end of the adapter tube 7 is connected to the air duct 6 on the top cover 3 by rotation, and the second bevel gear 904 connected to the output end of the driving motor 902 is meshed with the first bevel gear 901 to drive the air duct 6 to rotate on the top cover 3, and the multiple groups of exhaust pipes 12 connected to the lower end of the air duct 6 can not only stir the drying cylinder 1 with grain, but also release hot air to evenly dry the grain in the drying cylinder 1, and the dried hot air gathers at the top of the lower end of the top cover 3, and under the action of negative pressure, it is connected to the air inlet of the filter device 15 through the hose on the return air duct 5 to filter the particulate matter and moisture in the return air, and then the air is connected to the input end of the hot air blower 16 through the air outlet of the filter device 15 for circulation;

[0030] By welding an inclined tube body 122 on the air duct 6, when debris in the grain enters the tube body 122, it gathers at one end of the tube body 122 close to the end cover 124 along the inclined direction. When the exhaust duct 12 needs to be maintained, it is only necessary to use the output end of the cylinder 402 on the second assembly plate 403 to push the first assembly plate 401 to drive the top cover 3 to rise, which can facilitate the maintenance of the exhaust duct 12 by the staff.

Claims

1. A hot air circulation device for drying grain, comprising a drying cylinder (1), characterized in that: The upper end of the drying cylinder (1) is plugged with a top cover (3), the outer side of the top cover (3) is fixedly mounted with a lifting mechanism (4), the upper end of the top cover (3) is fixedly mounted with a return air duct (5), the back side of the drying cylinder (1) is respectively fixedly mounted with a hot air blower (16) and a filtering device (15), the upper end of the top cover (3) is fixedly mounted with a mounting frame (8), the inner side of the mounting frame (8) is fixedly mounted with a transfer tube (7), the inner side of the top cover (3) is rotatably connected with an air guide tube (6), and the outer side of the air guide tube (6) is rotatably mounted with a transfer tube (7) at equal angles. An exhaust pipe (12) is welded, the output end of the hot air blower (16) is fixedly installed through a hose and the upper end of a transfer pipe (7), the lower end of the transfer pipe (7) is rotatably connected to the inner side of the air guide pipe (6), the upper end of the return air pipe (5) is fixedly installed through a hose and the air inlet of the filter device (15), the air outlet of the filter device (15) is fixedly installed through a pipeline and the input end of the hot air blower (16), a linkage mechanism (9) is fixedly installed on the outer side of the air guide pipe (6), and a discharge pipe (2) with a cover is provided at the lower end of the drying cylinder (1); The linkage mechanism (9) comprises a first bevel tooth (901), the first bevel tooth (901) being fixedly mounted on the outside of the air duct (6), a mounting seat (903) being fixedly mounted on one side of the mounting frame (8), a driving motor (902) being fixedly mounted on the upper end of the mounting seat (903), an output end of the driving motor (902) being movably extended into the inside of the mounting frame (8) and a second bevel tooth (904) being fixedly mounted thereon, the first bevel tooth (901) and the second bevel tooth (904) being meshingly connected; The exhaust pipe (12) comprises a pipe body (122), one end of the pipe body (122) is welded to the outer wall of the lower end of the air guide pipe (6), an exhaust hole (121) is provided on the outer side of the pipe body (122), a mesh cover (123) is sleeved on the outer side of the pipe body (122), the mesh cover (123) covers the opening of the exhaust hole (121), and an end cap (124) is threadedly mounted on one end of the pipe body (122) away from the exhaust pipe (12).

2. A hot air circulation device for drying grain according to claim 1, characterized in that: The lifting mechanism (4) comprises a first assembly plate (401) and a second assembly plate (403); the first assembly plate (401) is symmetrically fixedly connected to the outside of the top cover (3); the second assembly plate (403) is symmetrically fixedly connected to the outside of the drying cylinder (1); a cylinder (402) is symmetrically fixedly mounted on the upper end of the second assembly plate (403); and the output end of the cylinder (402) is fixedly mounted to the lower end of the first assembly plate (401).

3. A hot air circulation device for drying grain according to claim 2, characterized in that: A reinforcement seat (17) is fixedly mounted on the outer side of the drying cylinder (1), and the upper end of the reinforcement seat (17) and the lower end of the second assembly plate (403) are fixedly mounted.

4. The hot air circulation device for drying grain according to claim 1, characterized in that: The outer side of the transfer tube (7) is fixedly connected to a fixing seat (11), and the fixing seat (11) is fixedly mounted on the upper end of the mounting frame (8) by means of screws. The lower end of the transfer tube (7) movably penetrates the wall of the mounting frame (8).

5. The hot air circulation device for drying grain according to claim 1, characterized in that: A sealing bearing (13) is provided on the inner side of the upper end of the air guide tube (6), and the air guide tube (6) is rotatably connected to the outer wall of the lower end of the transfer tube (7) via the sealing bearing (13).

6. The hot air circulation device for drying grain according to claim 1, characterized in that: A through hole (10) is provided on the inner side of the mounting frame (8), and the output end of the driving motor (902) movably passes through the through hole (10).

7. The hot air circulation device for drying grain according to claim 1, characterized in that: A rubber gasket (14) is sleeved on the outer side of the end cover (124), and the rubber gasket (14) is movably connected to an end of the tube body (122) away from the air guide tube (6).

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