Granary with annular ventilation function

Abstract

The granary comprises a granary cylinder, an air heater is arranged below the granary cylinder, a reciprocating driving part is installed at the top of the granary cylinder, the output shaft end of the reciprocating driving part is in transmission connection with a grain vibrating table capable of vibrating up and down in a reciprocating mode and a rotatable ventilation shaft, and the exterior of the ventilation shaft is rotationally connected with a stirring cylinder. The stirring cylinder is rotationally connected with the silo, the ventilation shaft is linked with the stirring cylinder, an inner ventilation assembly enabling grains to circularly flow back up and down is installed on the ventilation shaft, a grain outlet assembly is arranged at the bottom end of the stirring cylinder, a material ring is installed on the upper portion of the stirring cylinder, and a partition cylinder is installed on the periphery of the material ring. When the granary works, an internal ventilation type structure of a traditional granary is changed into an internal and external synchronous ventilation type structure through arrangement of structures such as the spiral air control blades, the ventilation outer holes and the ventilation inner holes, and the ventilation efficiency of the granary is effectively improved through implementation of the internal and external synchronous ventilation type structure.

Description

Technical Field

[0001] The invention relates to the technical field of granaries, and in particular to a granary with annular ventilation. Background Art

[0002] Granary is an important part of grain storage technology. There are many types of modern granaries. According to the way of stacking grain in the silo, they are divided into bulk silos and packaging silos. According to the appearance of the silo, they are divided into room-type silos, silos, and building silos. In the prior art, the patent document with publication number CN208821262U discloses a granary with ventilation function, including an outer silo and an inner silo. Both the outer silo and the inner silo are arranged on the bottom plate. A ventilation cavity is formed between the outer silo and the inner silo. The upper end of the inner silo is open, and a ground cage is arranged at the lower end of the inner silo. The side wall of the inner silo is provided with a plurality of ventilation holes. The aperture of the ventilation hole located above the ground cage is smaller than the particle size of the grain. The ventilation holes are connected with the ventilation cavity, and the ventilation holes are arranged below the ground cage. The above device transports the grain from the bottom of the granary upward through the auger. The grain falls from the annular guide plate and then falls into the bottom through the multi-layer annular screen, so as to realize the circulation of the grain. Then, the grain in the circulation process is fully ventilated by the cooperation of the air inlet, the ventilation cavity and the air outlet, and the ventilation effect is good. However, the above device has the following technical problems when used:

[0003] 1. The existing granary cannot integrate external ventilation and internal ventilation functions during ventilation, so the ventilation efficiency is relatively limited;

[0004] 2. When the existing ventilation device realizes the up and down reflux of grain, the grain is in a static reflux structure. Due to the limitations of the static reflux structure and the static ventilation structure, the ventilation angle and ventilation uniformity of the grain are relatively limited;

[0005] Based on this, the present invention provides a granary with annular ventilation to solve the technical problems raised in the above background technology. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the object of the present invention is to provide a granary with annular ventilation. When the present invention is working, the internal ventilation structure of the traditional granary is changed to an internal and external synchronous ventilation structure through the arrangement of structures such as spiral wind control blades, external ventilation holes and internal ventilation holes. By realizing the internal and external synchronous ventilation structure, the ventilation efficiency of the granary is effectively improved.

[0008] (II) Technical solution

[0009] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a technical solution adopted by a grain silo with annular ventilation is: it includes a silo barrel, a hot air blower is arranged at the bottom of the silo barrel, a reciprocating driving component is installed on the top of the silo barrel, the output shaft end of the reciprocating driving component is transmission-connected with a grain vibrating platform that can reciprocate up and down and a rotatable ventilation shaft, the external rotation of the ventilation shaft is connected with a stirring drum, the stirring drum is rotationally connected to the silo barrel, the ventilation shaft is linked with the stirring drum, an internal ventilation component for circulating grain up and down is installed on the ventilation shaft, and a grain outlet component is arranged at the bottom end of the stirring drum. A material ring is installed on the upper part of the mixing drum, and a partition is installed on the outer periphery of the material ring. The partition is fitted with the silo, and a plurality of groups of external ventilation holes distributed in a circular array are provided inside the partition, and a ventilation ring cavity is provided between the relative surfaces of the partition and the silo, and spiral wind control blades are fixedly installed on the partition corresponding to the position of the ventilation ring cavity, and a group of exhaust holes regularly distributed and connected with the ventilation ring cavity are provided on the top of the silo, and an external ventilation component that supplies air to the ventilation ring cavity and clears the external ventilation holes is installed on the outside of the silo, and the air outlet port of the hot air blower is respectively connected with the external ventilation component and the internal ventilation component.

[0010] As a preferred embodiment, a ring edge is provided on the top surface of the silo corresponding to the position above the exhaust hole, a material injection valve is connected to the top surface of the silo corresponding to the position above the material ring, and a group of grain leakage holes distributed in a circular array are opened inside the material ring.

[0011] As a preferred solution, a grain storage cavity is fixedly provided between the partition cylinder and the stirring cylinder, the bottom end of the partition cylinder is open, and the bottom of the storage cylinder is a funnel-shaped structure.

[0012] As a preferred embodiment, the reciprocating drive component includes a motor fixed on the silo and a vertical axis and a horizontal axis a rotatably connected to the silo, the vertical axis is driven by the motor, and the horizontal axis a is driven by the vertical axis. The upper part of the ventilation shaft is fixedly provided with an axis groove with a top opening and transmission connected to the vertical axis. The cross-sections of the axis groove and the vertical axis are both regular polygons. A vertically arranged vibration guide tooth plate is fixedly installed on the top surface of the grain vibrating table, and a semi-transmission gear transmission connected to the vibration guide tooth plate is fixedly installed on the horizontal axis a. A return spring is installed between the relative surfaces of the grain vibrating table and the silo.

[0013] As a preferred solution, a horizontal axis b is rotatably connected to the grain vibrating table, a first bevel gear is fixedly installed on the ventilation shaft and the mixing drum, a second bevel gear is fixedly installed on the horizontal axis b, the two second bevel gears are both transmission-connected to the first bevel gear, and the two second bevel gears are respectively arranged on both sides of the first bevel gear.

[0014] As a preferred embodiment, the internal ventilation component includes a ventilation channel opened on the ventilation shaft and the vertical axis, an exhaust pipe fixed on the top surface of the silo and connected to the ventilation channel, the outer periphery of the ventilation shaft is provided with a plurality of regularly distributed ventilation inner holes connected to the ventilation channel, the lower part of the mixing drum is provided with a group of grain feed holes, the upper part of the mixing drum is provided with a group of grain return holes, a spiral lifting piece is fixedly connected to the ventilation shaft, the spiral lifting piece is rotatably fitted with the mixing drum, the mixing drum is fixedly installed with a spiral stirring piece at a position corresponding to the grain feed hole and the grain return hole, the port of the hot air blower is fixedly connected with a corrugated air supply pipe, the air outlet port of the corrugated air supply pipe is connected to the ventilation channel, and an axial flow exhaust fan and a temperature and humidity probe are respectively installed inside the exhaust duct.

[0015] As a preferred embodiment, the grain discharge assembly includes a grain unloading pipe disposed at the lower part of the mixing drum and rotatably connected to the mixing drum, the grain unloading pipe is rotatably connected to the ventilation shaft, a T-shaped guide rod is fixedly installed on the bottom surface of the silo, the grain unloading pipe is slidably connected to the T-shaped guide rod, and a unloading valve is fixedly installed inside the grain unloading pipe.

[0016] As a preferred embodiment, the external ventilation component includes an air distribution duct arranged at the bottom of the silo, a group of anti-clearing nozzles distributed in a circular array and fixed to the outside of the silo, each of the anti-clearing nozzles supplies air through the air distribution duct, the port of the hot air blower is fixedly connected to the air distribution duct through a pipeline, and the air outlet end of each of the anti-clearing nozzles is provided with a group of anti-clearing spray holes distributed in a linear array and the air outlet direction is facing the ventilation ring cavity.

[0017] As a preferred embodiment, the axes of the exhaust holes, ventilation inner holes and anti-clearing spray holes are perpendicular to the axis of the silo, the exhaust holes, ventilation inner holes and anti-clearing spray holes are all circular holes, the apertures of the exhaust holes, ventilation inner holes and anti-clearing spray holes are the same, and the aperture range of the exhaust holes is 0.15mm-0.35mm.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention provides a granary with annular ventilation, which has the following beneficial effects:

[0020] 1. When the present invention is working, the internal ventilation structure of the traditional granary is changed into an internal and external synchronous ventilation structure through the arrangement of spiral wind control blades, external ventilation holes and internal ventilation holes. By realizing the internal and external synchronous ventilation structure, the ventilation efficiency of the granary is effectively improved.

[0021] 2. When the present invention is working, the motor works periodically. During the working cycle of the motor, on the one hand, the grain can circulate up and down, so that the grain can evenly receive the synchronous ventilation effect of the inside and outside. On the other hand, when the grain is ventilated inside and outside, it can generate micro-vibration movement of a set frequency. Through the occurrence of micro-vibration movement, the grain can receive ventilation from multiple angles and in all directions, thereby effectively improving the ventilation effect of the granary.

[0022] 3. When the present invention is working, the rotary structure setting of the partition drum and the stirring drum and the upper and lower circulation reflux structure setting during grain ventilation can effectively increase the disturbance degree during grain storage and improve the grain particle dispersion, thereby effectively avoiding grain agglomeration during storage. The realization of the above-mentioned technical effects is conducive to the ventilation, drying and stable storage of grain. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a granary with annular ventilation according to the present invention;

[0024] Figure 2 For the present invention Figure 1 A schematic diagram of the cross-sectional structure of;

[0025] Figure 3 For the present invention Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0026] Figure 4 For the present invention Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0027] Figure 5 For the present invention Figure 2 A schematic diagram of the local enlarged structure at C in the middle;

[0028] Figure 6 It is a schematic diagram of the structure of the material ring, the spacer, the outer ventilation hole and the grain leakage hole of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the temperature and humidity probe and the horizontal axis a of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of the mixing drum and the grain return hole of the present invention.

[0031] In the figure: 1. silo; 2. hot air blower; 3. grain vibrating table; 4. ventilation shaft; 5. stirring drum; 6. material ring; 7. partition; 8. ventilation outer hole; 9. ventilation ring cavity; 10. spiral wind control blade; 11. exhaust hole; 12. injection valve; 13. grain leakage hole; 14. motor; 15. vertical axis; 16. horizontal axis a; 17. vibration guide gear plate; 18. semi-transmission gear; 19. return spring; 20. horizontal axis b; 21. ventilation flow channel; 22. exhaust pipe; 23. ventilation inner hole; 24. grain inlet hole; 25. grain return hole; 26. spiral lifting plate; 27. spiral stirring blade; 28. corrugated air supply pipe; 29. ​​temperature and humidity probe; 30. grain unloading pipe; 31. T-shaped guide rod; 32. air distribution pipe; 33. anti-cleaning spray pipe; 34. anti-cleaning spray hole. DETAILED DESCRIPTION

[0032] The present invention will be further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0033] See also Figure 1-8 The present invention is a granary with annular ventilation, and the technical solution adopted is: comprising a silo 1, and a hot air blower 2 is arranged below the silo 1;

[0034] The hot air blower 2 can blow out both cold air and hot air when working;

[0035] A reciprocating drive component is installed on the top of the silo 1, and the output shaft end of the reciprocating drive component is connected to a grain vibrating table 3 that can reciprocate up and down and a rotatable ventilation shaft 4;

[0036] The reciprocating drive component includes a motor 14 fixed to the silo 1 and a vertical shaft 15 and a horizontal shaft a16 rotatably connected to the silo 1, the vertical shaft 15 is driven by the motor 14, and the horizontal shaft a16 is driven by the vertical shaft 15;

[0037] The output shaft end of the motor 14 is fixedly mounted with an active bevel gear, the vertical shaft 15 is fixedly mounted with a passive bevel gear, and the horizontal shaft a16 is fixedly mounted with a linkage bevel gear, and both the linkage bevel gear and the active bevel gear are transmission-connected with the passive bevel gear;

[0038] The upper part of the ventilation shaft 4 is fixed with an axis groove with a top opening and drivingly connected to the vertical shaft 15, and the cross-sections of the axis groove and the vertical shaft 15 are both regular polygons;

[0039] The shaft groove and the regular polygonal cross section of the vertical shaft 15 are arranged so that when the ventilation shaft 4 moves up and down, the vertical shaft 15 can continuously drive the ventilation shaft 4;

[0040] A vertically arranged vibration guide tooth plate 17 is fixedly installed on the top surface of the grain vibrating table 3, a semi-transmission gear 18 drivingly connected to the vibration guide tooth plate 17 is fixedly installed on the horizontal axis a16, and a return spring 19 is installed between the opposite surfaces of the grain vibrating table 3 and the silo 1;

[0041] By setting the return spring 19, the semi-transmission gear 18 and the vibration guide tooth plate 17, after the motor 14 outputs the speed, the grain vibration table 3 can drive the ventilation shaft 4, the stirring drum 5 and the partition drum 7 to reciprocate within the set stroke;

[0042] The outside of the ventilation shaft 4 is rotatably connected with a stirring drum 5, the stirring drum 5 is rotatably connected with the silo drum 1, and the ventilation shaft 4 and the stirring drum 5 are linked;

[0043] The vibrating grain table 3 is rotatably connected with a transverse axis b20, the ventilation shaft 4 and the mixing drum 5 are both fixedly mounted with a first bevel gear, the transverse axis b20 is fixedly mounted with a second bevel gear, the two second bevel gears are both transmission-connected with the first bevel gear, and the two second bevel gears are respectively arranged on both sides of the first bevel gear;

[0044] By setting the two second bevel gears and the first bevel gear, the rotation directions of the mixing drum 5 and the ventilation shaft 4 are different;

[0045] An internal ventilation assembly is installed on the ventilation shaft 4 to allow the food to circulate up and down;

[0046] The inner ventilation assembly includes a ventilation channel 21 opened on the ventilation shaft 4 and the vertical shaft 15, an exhaust pipe 22 fixed to the top surface of the silo 1 and connected to the ventilation channel 21, and a plurality of regularly distributed ventilation inner holes 23 connected to the ventilation channel 21 are opened on the outer periphery of the ventilation shaft 4;

[0047] A group of grain inlet holes 24 are opened at the lower part of the mixing drum 5, and a group of grain return holes 25 are opened at the upper part of the mixing drum 5. A spiral lifting piece 26 is fixedly connected to the ventilation shaft 4, and the spiral lifting piece 26 is rotatably fitted with the mixing drum 5.

[0048] The stirring drum 5 is fixedly provided with a spiral stirring blade 27 at a position corresponding to the position between the grain inlet hole 24 and the grain return hole 25;

[0049] The spiral stirring blade 27 is provided to promote the grain to move toward the grain inlet hole 24 and improve the dispersion rate of the grain in the silo 1.

[0050] The port of the hot air blower 2 is fixedly connected to a corrugated air supply pipe 28, and the air outlet port of the corrugated air supply pipe 28 is connected to the ventilation channel 21;

[0051] An axial flow exhaust fan and a temperature and humidity probe 29 are installed inside the exhaust pipe 22;

[0052] During ventilation operation, the axial flow exhaust fan is used to discharge the airflow in the silo 1, and the temperature and humidity probe 29 is used to monitor the temperature and humidity of the exhaust airflow in the axial flow exhaust fan in real time;

[0053] When working, the device is equipped with a single chip microcomputer, and the temperature and humidity probe 29 feeds back the monitored real-time data to the single chip microcomputer, and the single chip microcomputer controls the air inlet temperature of the hot air blower 2 and the exhaust power of the axial flow exhaust fan according to the data feedback of the temperature and humidity probe 29;

[0054] The single chip microcomputer and the temperature and humidity probe 29 can be customized or selected according to actual needs;

[0055] A grain discharging assembly is provided at the bottom end of the mixing drum 5;

[0056] The grain discharging assembly includes a grain discharging pipe 30 disposed at the lower part of the mixing drum 5 and rotatably connected to the mixing drum 5. The grain discharging pipe 30 is rotatably connected to the ventilation shaft 4. A T-shaped guide rod 31 is fixedly installed on the bottom surface of the silo 1. The grain discharging pipe 30 is slidably connected to the T-shaped guide rod 31. A discharging valve is fixedly installed inside the grain discharging pipe 30.

[0057] A material ring 6 is installed on the upper part of the mixing drum 5, and a spacer 7 is installed on the outer periphery of the material ring 6;

[0058] A grain storage cavity is fixedly arranged between the partition cylinder 7 and the mixing cylinder 5, the bottom end of the partition cylinder 7 is open, and the bottom of the silo cylinder 1 is a funnel-shaped structure;

[0059] The top surface of the silo 1 and the position above the corresponding material ring 6 are connected to a material injection valve 12, and a group of grain leakage holes 13 distributed in a circumferential array are opened inside the material ring 6;

[0060] The partition 7 is fitted with the silo 1, and a plurality of groups of ventilation holes 8 are arranged in a circular array inside the partition 7, a ventilation ring cavity 9 is arranged between the opposite surfaces of the partition 7 and the silo 1, and spiral wind control blades 10 are fixedly installed on the partition 7 and at the position corresponding to the ventilation ring cavity 9, and a group of exhaust holes 11 are arranged on the top of the silo 1 and are regularly distributed and connected to the ventilation ring cavity 9;

[0061] A ring edge is provided on the top surface of the silo 1 and at a position corresponding to the top of the exhaust hole 11;

[0062] An external ventilation component is installed outside the silo 1 to supply air into the ventilation ring cavity 9 and to clear the external ventilation hole 8. The air outlet of the hot air blower 2 is connected to the external ventilation component and the internal ventilation component respectively.

[0063] The external ventilation component includes an air distribution pipe 32 arranged at the bottom of the silo 1, and a group of anti-cleaning nozzles 33 distributed in a circular array and fixed on the outside of the silo 1. Each anti-cleaning nozzle 33 supplies air through the air distribution pipe 32. The port of the hot air blower 2 is fixedly connected to the air distribution pipe 32 through a pipeline. The air outlet end of each anti-cleaning nozzle 33 is provided with a group of anti-cleaning spray holes 34 distributed in a linear array and the air outlet direction is directly facing the ventilation ring cavity 9.

[0064] The axes of the exhaust hole 11, the ventilation inner hole 23 and the anti-cleaning spray hole 34 are all perpendicular to the axis of the silo 1;

[0065] The exhaust hole 11, the ventilation inner hole 23 and the anti-cleaning spray hole 34 are all circular holes;

[0066] The diameters of the exhaust hole 11, the ventilation inner hole 23 and the anti-cleaning spray hole 34 are the same, and the diameter of the exhaust hole 11 is 0.2 mm.

[0067] When in use, the diameters of the exhaust holes 11, the ventilation inner holes 23 and the anti-cleaning spray holes 34 are all smaller than the particle size of the grain stored in the silo 1;

[0068] The working principle of the present invention is that during processing, the apertures of the exhaust holes 11, the ventilation inner holes 23 and the anti-cleaning spray holes 34 are all smaller than the particle size of the grain stored in the silo 1. When the grain is stored, the motor 14 and the hot air blower 2 work synchronously and periodically. After the motor 14 works, the spiral wind control blades 10, the spiral lifting blades 26 and the spiral stirring blades 27 all rotate at a set speed, and the lifting directions of the spiral wind control blades 10 and the spiral lifting blades 26 are both upward, and the conveying direction of the spiral stirring blades 27 is downward. At the same time, after the motor 14 works, the grain vibrating table 3 drives the spiral The wind control blades 10, the spiral lifting blades 26 and the spiral stirring blades 27 vibrate back and forth up and down within a set stroke at a set frequency. The vibration of the spiral lifting blades 26 causes the grain to oscillate at a set frequency during ventilation and drying. The oscillation of the grain causes the ventilation airflow to act on the grain in all directions and at multiple angles, thereby effectively improving the ventilation efficiency and effect of the grain. At the same time, the rotation of the spiral lifting blades 26 allows the grain in the silo 1 to circulate up and down and reflux, and circulate for external ventilation and internal ventilation.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A granary with annular ventilation, comprising a granary tube (1), characterized in that: A hot air blower (2) is provided below the silo (1), a reciprocating drive component is installed on the top of the silo (1), the output shaft end of the reciprocating drive component is drivingly connected to a grain vibrating table (3) that can reciprocate up and down and a rotatable ventilation shaft (4), the outside of the ventilation shaft (4) is rotatably connected to a stirring drum (5), the stirring drum (5) is rotatably connected to the silo (1), the ventilation shaft (4) and the stirring drum (5) are linked, an internal ventilation component for allowing grain to circulate up and down is installed on the ventilation shaft (4), the bottom end of the stirring drum (5) is provided with a grain discharge component, the upper part of the stirring drum (5) is installed with a material ring (6), the outer periphery of the material ring (6) is installed with a spacer (7), The partition (7) is fitted with the silo (1), and a plurality of groups of external ventilation holes (8) distributed in a circular array are provided inside the partition (7). A ventilation ring cavity (9) is provided between the relative surfaces of the partition (7) and the silo (1). A spiral wind control blade (10) is fixedly installed on the partition (7) and at a position corresponding to the ventilation ring cavity (9). A group of exhaust holes (11) regularly distributed and connected to the ventilation ring cavity (9) are provided on the top of the silo (1). An external ventilation component for supplying air into the ventilation ring cavity (9) and draining air from the external ventilation holes (8) is installed outside the silo (1), and an air outlet port of the hot air blower (2) is respectively connected to the external ventilation component and the internal ventilation component.

2. A granary with annular ventilation according to claim 1, characterized in that: A ring edge is provided on the top surface of the silo (1) and at a position corresponding to the top of the exhaust hole (11); a material injection valve (12) is connected to the top surface of the silo (1) and at a position corresponding to the top of the material ring (6); and a group of grain leakage holes (13) distributed in a circular array are provided inside the material ring (6).

3. A granary with annular ventilation according to claim 2, characterized in that: A grain storage cavity is fixedly arranged between the partition cylinder (7) and the stirring cylinder (5); the bottom end of the partition cylinder (7) is open, and the bottom of the silo cylinder (1) is a funnel-shaped structure.

4. A granary with annular ventilation according to claim 3, characterized in that: The reciprocating drive component comprises a motor (14) fixed on the silo (1) and a vertical shaft (15) and a horizontal shaft a (16) rotatably connected to the silo (1), the vertical shaft (15) being driven by the motor (14), and the horizontal shaft a (16) being driven by the vertical shaft (15); the upper part of the ventilation shaft (4) is fixedly provided with an axis groove with a top opening and transmission connected to the vertical shaft (15); the cross-sections of the axis groove and the vertical shaft (15) are both regular polygons; the top surface of the grain vibrating platform (3) is fixedly provided with a vertically arranged vibration guide tooth plate (17); the horizontal shaft a (16) is fixedly provided with a semi-transmission gear (18) transmission connected to the vibration guide tooth plate (17); and a return spring (19) is installed between the relative surfaces of the grain vibrating platform (3) and the silo (1).

5. A granary with annular ventilation according to claim 4, characterized in that: The grain vibrating table (3) is rotatably connected to a transverse axis b (20), the ventilation shaft (4) and the mixing drum (5) are both fixedly mounted with a first bevel gear, the transverse axis b (20) is fixedly mounted with a second bevel gear, the two second bevel gears are both transmission-connected to the first bevel gear, and the two second bevel gears are respectively arranged on both sides of the first bevel gear.

6. A granary with annular ventilation according to claim 5, characterized in that: The internal ventilation component comprises a ventilation channel (21) provided on the ventilation shaft (4) and the vertical shaft (15), an exhaust pipe (22) fixed on the top surface of the silo (1) and connected to the ventilation channel (21), a plurality of regularly distributed ventilation inner holes (23) provided on the outer periphery of the ventilation shaft (4) and connected to the ventilation channel (21), a group of grain inlet holes (24) provided on the lower part of the stirring drum (5), a group of grain return holes (25) provided on the upper part of the stirring drum (5), and a plurality of regularly distributed ventilation inner holes (23) provided on the outer periphery of the ventilation shaft (4) and connected to the ventilation channel (21). A spiral lifting piece (26) is connected, and the spiral lifting piece (26) is rotatably fitted with the stirring drum (5). The stirring drum (5) is fixedly installed with a spiral stirring piece (27) at a position corresponding to the grain inlet hole (24) and the grain return hole (25). The port of the hot air blower (2) is fixedly connected to a corrugated air supply pipe (28), and the air outlet port of the corrugated air supply pipe (28) is connected to the ventilation channel (21). An axial flow exhaust fan and a temperature and humidity probe (29) are respectively installed inside the exhaust pipe (22).

7. A granary with annular ventilation according to claim 6, characterized in that: The grain discharge assembly comprises a grain discharge pipe (30) which is arranged at the lower part of the stirring drum (5) and is rotatably connected to the stirring drum (5); the grain discharge pipe (30) is rotatably connected to the ventilation shaft (4); a T-shaped guide rod (31) is fixedly installed on the bottom surface of the silo (1); the grain discharge pipe (30) is slidably connected to the T-shaped guide rod (31); and a discharge valve is fixedly installed inside the grain discharge pipe (30).

8. A granary with annular ventilation according to claim 7, characterized in that: The external ventilation component comprises an air distribution pipe (32) arranged at the bottom of the silo (1), and a group of anti-cleaning nozzles (33) distributed in a circular array and fixed to the outside of the silo (1), each of the anti-cleaning nozzles (33) supplies air through the air distribution pipe (32), the port of the hot air blower (2) is fixedly connected to the air distribution pipe (32) through a pipeline, and the air outlet end of each of the anti-cleaning nozzles (33) is provided with a group of anti-cleaning nozzle holes (34) distributed in a linear array and the air outlet direction is directly facing the ventilation ring cavity (9).

9. A granary with annular ventilation according to claim 8, characterized in that: The axes of the exhaust hole (11), the ventilation inner hole (23) and the anti-cleaning spray hole (34) are all perpendicular to the axis of the silo (1); the exhaust hole (11), the ventilation inner hole (23) and the anti-cleaning spray hole (34) are all circular holes; the apertures of the exhaust hole (11), the ventilation inner hole (23) and the anti-cleaning spray hole (34) are the same; the aperture range of the exhaust hole (11) is 0.15 mm-0.35 mm.

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