A kind of grain storehouse insect control processing circulating fumigation device

Abstract

This invention relates to the field of grain storage pest control technology, and discloses a circulating fumigation device for grain storage pest control. The device includes a grain storage silo, a motor fixed to one side of the silo, a rotating shaft fixed to the output end of the motor, and an air-jet fumigation assembly fixed to one end of the rotating shaft. The air-jet fumigation assembly includes a rotating cylinder, a rotating shaft three rotating on one side of the rotating cylinder, bevel gear three and bevel gear five fixed to its two ends respectively, a fixing rod fixed to the inner side of the grain storage silo, a bevel gear ring fixed to one end of the fixing rod, a rotating shaft five rotating on one side of the grain storage silo, a bevel gear six and a pulley one fixed to its two ends respectively, a slip ring two sliding on the outer side of the rotating cylinder, an air inlet pipe connected to one side of the slip ring two, a medicine tank connected to one end of the air inlet pipe, and a circulating air pump connected to one side of the medicine tank. This invention has the advantages of reasonable structure, easy control and adjustment, and good circulating fumigation effect within the grain storage silo.

Description

Technical Field

[0001] This invention relates to the field of grain storage pest control technology, specifically a circulating fumigation device for grain storage pest control. Background Technology

[0002] Circulating fumigation is an essential facility for pest control currently used in grain depots. It involves applying pesticides through an external generator and using an internal circulating system to disperse the pesticide gas throughout the grain depot, thereby achieving the purpose of killing insects. It allows the toxic gas to spread quickly and evenly within the grain pile, reducing the labor intensity of pesticide application, minimizing the time spent in contact with toxic gas, and achieving good pest control results.

[0003] In some existing circulating fumigation devices, due to the large amount of grain in the grain silo, the circulation speed of the fumigant gas in the grain silo is slow and the gas cannot circulate evenly in the grain silo, resulting in poor fumigation effect on the grain in the grain silo. In addition, the circulating gas can easily blow dust in the grain silo into the circulating air pump, affecting the normal operation of the circulating air pump. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of existing circulating fumigation devices, which suffer from slow and uneven circulation of fumigant gas in grain silos due to the large amount of grain inside, resulting in poor fumigation effect on the grain and the tendency of circulating gas to blow dust into the circulating air pump, affecting its normal operation. Therefore, this invention proposes a circulating fumigation device for pest control in grain silos.

[0005] The objective of this invention can be achieved through the following technical solutions: A circulating fumigation device for pest control in grain storage includes a grain storage silo. A motor is fixed to one side of the grain storage silo, and a rotating shaft is fixed to the output end of the motor. A jet fumigation assembly is fixed to one end of the rotating shaft. The jet fumigation assembly includes a rotating cylinder. A rotating shaft is rotatably mounted on one side of the rotating cylinder. A bevel gear three and a bevel gear five are fixed to the two ends of the rotating shaft three, respectively. A fixing rod is fixed to the inner side of the grain storage silo, and a bevel ring is fixed to one end of the fixing rod. A rotating shaft five is rotatably mounted on one side of the grain storage silo, and a bevel gear six and a pulley one are fixed to the two ends of the rotating shaft five, respectively. A slip ring two slides on the outer side of the rotating cylinder. An air inlet pipe is connected to one side of the slip ring two. A medicine tank is connected to one end of the air inlet pipe. A circulating air pump is connected to one side of the medicine tank. A filter mechanism is connected to the input end of the circulating air pump. The filter mechanism includes a filter box. An air outlet pipe is connected to one side of the filter box, and one end of the air outlet pipe is connected to the interior of the grain storage silo.

[0006] In a preferred embodiment of the present invention, the first rotating shaft extends into the interior of the grain silo and is rotatably connected to the grain silo. Both the first rotating shaft and the rotating drum are connected by a motor to form a rotating structure. The interior of the rotating drum is a cavity structure. A through pipe is rotatably provided on the inner side of the rotating drum, and an air hole is provided on the outer side of the through pipe. The air hole and the rotating drum are connected by the through pipe to form a communication structure.

[0007] In a preferred embodiment of the present invention, a bevel gear 1 is fixed to the outer side of the through pipe, a rotating shaft 2 is rotatable on the inner side of the rotating drum, a bevel gear 2 is fixed to the outer side of the rotating shaft 2, and two bevel gears 2 are provided, with each bevel gear 2 meshing with one of the four bevel gears 1.

[0008] In a preferred embodiment of the present invention, the rotating shaft three, bevel gear three and bevel gear five are located on the same rotation axis, one end of the rotating shaft two is fixed with bevel gear four, bevel gear three and bevel gear four mesh with each other, and bevel gear five meshes with bevel gear ring.

[0009] In a preferred embodiment of the present invention, a connecting rod is fixed to the outer side of the rotating shaft one, a slip ring one is rotatably mounted on one side of the grain silo, a rotating shaft four is rotatably mounted on one side of the slip ring one, the connecting rod and the rotating shaft four are rotatably connected, a helical blade is fixed to the outer side of the rotating shaft four, a transmission gear is fixed to one end of the rotating shaft four, a fixed gear ring is fixed to one side of the grain silo, and the transmission gear and the fixed gear ring mesh with each other.

[0010] In a preferred embodiment of the present invention, the fifth rotating shaft, the sixth bevel gear, and the first belt pulley are located on the same axis of rotation, the sixth bevel gear meshes with the third bevel gear, and the second, third, and fifth rotating shafts are all synchronously rotating.

[0011] In a preferred embodiment of the present invention, the medicine box is connected to the output end of the circulating air pump, and the rotating drum, air inlet pipe, medicine box, circulating air pump, filter box and air outlet pipe form a circulating connection structure.

[0012] In a preferred embodiment of the present invention, a filter screen is fixed inside the filter box, two sliding rods are fixed inside the filter box, a slider slides on the outer side of the two sliding rods, a scraper is fixed on one side of the slider, and the scraper is in contact with the surface of the filter screen.

[0013] In a preferred embodiment of the present invention, a limiting groove is provided on one side of the slider, a rotating shaft is rotatably provided on one side of the filter box, a rotating rod is fixed at one end of the rotating shaft, a limiting rod is fixed on one side of the rotating rod, and the limiting rod and the limiting groove are slidably connected.

[0014] In a preferred embodiment of the present invention, a bevel gear seven is fixed to the end of the rotating shaft six away from the rotating rod, the rotating shaft seven is rotatably mounted on one side of the filter box, a bevel gear eight is fixed to one end of the rotating shaft seven, the bevel gear eight and the bevel gear seven mesh with each other, a pulley two is fixed to the other end of the rotating shaft seven, a transmission belt is frictionally connected between the pulley two and the pulley one, and a dust collection box is slidably mounted on one side of the filter box, the dust collection box being located below the scraper.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The motor drives shaft one and the rotating drum to rotate, which in turn drives the through pipe, air hole, shaft three, bevel gear three, and bevel gear five to rotate around the circumference of the rotating drum. Bevel gear five rotates under the action of its meshing bevel gear ring, which in turn drives bevel gear four, which in turn drives bevel gear two, which in turn drives bevel gear one, which in turn drives the through pipe and air hole to rotate. The circumferential and rotational vents can spray fumigant on grains at different locations within the granary. Simultaneously, the rotating shaft one can drive the connecting rod to rotate, causing the connecting rod to drive the rotating shaft four and the transmission gear to rotate around the rotating shaft one. The transmission gear can then rotate under the action of the meshing fixed gear ring, which in turn drives the rotating shaft four and the spiral blades to rotate in both directions. This rotation of the spiral blades can agitate the grains at different locations within the granary, resulting in a better and more uniform fumigation effect. 2. The motor drives bevel gear three to rotate, which in turn drives bevel gear six, which in turn drives shaft five and pulley one to rotate. Pulley one, under the action of the transmission belt, drives pulley two to rotate, which in turn drives shaft seven and bevel gear eight to rotate. Bevel gear eight, in turn, drives bevel gear seven, which in turn drives shaft six and a rotating rod to rotate. This rotating rod causes a limiting rod to slide repeatedly within a limiting groove, causing a slider to slide back and forth on a sliding rod. This slider, in turn, causes a scraper to slide back and forth, scraping away dust adsorbed on the filter screen. This prevents dust from entering the circulating air pump, and the scraping of dust from the filter screen prevents clogging. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a bottom-view three-dimensional structural diagram of the present invention; Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the grain warehouse in this invention; Figure 4 This is a cross-sectional three-dimensional structural diagram of the rotating cylinder in this invention; Figure 5 This is a three-dimensional cross-sectional view of the filter box structure in this invention.

[0018] In the diagram: 1. Grain bin; 2. Motor; 3. Shaft 1; 4. Rotating drum; 5. Through pipe; 6. Air hole; 7. Bevel gear 1; 8. Shaft 2; 9. Bevel gear 2; 10. Shaft 3; 11. Bevel gear 3; 12. Bevel gear 4; 13. Bevel gear 5; 14. Fixed rod; 15. Bevel gear ring; 16. Connecting rod; 17. Slip ring 1; 18. Shaft 4; 19. Spiral blade; 20. Transmission gear; 21. Fixed gear ring; 22. Shaft 5; 23. Conical... 24. Gear 6; 25. Belt pulley 1; 26. Slip ring 2; 27. Air inlet pipe; 28. Medicine tank; 29. ​​Circulating air pump; 20. Filter box; 31. Air outlet pipe; 32. Filter screen; 33. Sliding rod; 34. Sliding block; 35. Scraper; 36. Limiting groove; 37. Shaft 6; 38. Rotating rod; 39. Limiting rod; 40. Bevel gear 7; 41. Belt pulley 2; 42. Drive belt; 43. Dust collection box. Detailed Implementation

[0019] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Example 1

[0025] Please see Figures 1-5As shown, a circulating fumigation device for pest control in grain storage includes a grain storage 1. A motor 2 is fixed to one side of the grain storage 1, and a rotating shaft 3 is fixed to the output end of the motor 2, allowing the motor 2 to drive the rotating shaft 3 to rotate. A jet fumigation assembly is fixed to one end of the rotating shaft 3, which can perform jet fumigation inside the grain storage 1. The jet fumigation assembly includes a rotating cylinder 4, with a rotating shaft 10 rotating on one side of the rotating cylinder 4. A bevel gear 11 and a bevel gear 13 are fixed to the two ends of the rotating shaft 10, respectively. A fixing rod 14 is fixed to the inner side of the grain storage 1, with a bevel ring 15 fixed to one end of the fixing rod 14. A rotating shaft 22 is rotating on one side of the grain storage 1, with a bevel gear 23 and a pulley 24 fixed to the two ends of the rotating shaft 22, respectively. A sliding ring 25 slides on the outer side of the rotating cylinder 4, and a sealing structure is provided between the sliding ring 25 and the rotating cylinder 4 to avoid affecting the rotation of the grain storage 1. While ensuring smooth operation between the slip ring 25 and the rotating drum 4, the escape of the chemical vapor can also be prevented. One side of the slip ring 25 is connected to an air inlet pipe 26, one end of which is connected to a medicine box 261. One side of the medicine box 261 is connected to a circulating air pump 27, and the input end of the circulating air pump 27 is connected to a filter mechanism, which includes a filter box 28. One side of the filter box 28 is connected to an air outlet pipe 29, one end of which is connected to the inside of the grain silo 1. By controlling the circulating air pump 27, the circulating air pump 27 delivers the chemical vapor in the medicine box 261 to the rotating drum 4 through the air inlet pipe 26. The chemical vapor enters the grain silo 1 through the through pipe 5 and the air hole 6 set on the rotating drum 4, circulates in the grain silo 1, enters the filter box 28 through the air outlet pipe 29, and then returns to the circulating air pump 27 from the filter box 28. This cycle is repeated to achieve fumigation of the grain in the grain silo 1.

[0026] Example 2

[0027] Please see Figures 1-5As shown, the rotating shaft 3 extends into the interior of the grain silo 1, and the rotating shaft 3 is rotatably connected to the grain silo 1. Both the rotating shaft 3 and the rotating drum 4 are connected by the motor 2 to form a rotating structure. The interior of the rotating drum 4 is a hollow structure. A through pipe 5 rotates on the inner side of the rotating drum 4, and an air hole 6 is provided on the outer side of the through pipe 5. The air hole 6 and the rotating drum 4 are connected by the through pipe 5. A bevel gear 7 is fixed on the outer side of the through pipe 5. A rotating shaft 8 rotates on the inner side of the rotating drum 4. A bevel gear 9 is fixed on the outer side of the rotating shaft 8. There are two bevel gears 9. Each bevel gear 9 meshes with four bevel gears 7. The rotating shaft 10, bevel gear 11, and bevel gear 13 are located on the same axis of rotation. A bevel gear 12 is fixed at one end of the rotating shaft 8. Bevel gear 11 meshes with bevel gear 12, and bevel gear 13 meshes with bevel ring 15. Motor 2 drives shaft 13 to rotate, which in turn drives drum 4 to rotate. Drum 4 causes pipe 5 and air hole 6 to rotate around drum 4. Simultaneously, drum 4 drives shaft 10, bevel gear 11, and bevel gear 13 to rotate around drum 4. Bevel gear 13 rotates under the action of bevel ring 15, which in turn drives shaft 10 and bevel gear 11 to rotate. Bevel gear 11 then drives bevel gear 12, which in turn drives shaft 28 to rotate. 8 can drive bevel gear 2 9 to rotate, which in turn drives bevel gear 1 7 to rotate. This allows the pipe 5 and the air hole 6 to rotate around the rotating cylinder 4 while also rotating on their own axis. When the medicinal gas enters the rotating cylinder 4, the rotation of the pipe 5 and the air hole 6 around the rotating cylinder 4 ensures that the medicinal gas is evenly distributed in the grain bin 1. A connecting rod 16 is fixed to the outside of the rotating shaft 1 3. A slip ring 17 rotates on one side of the grain bin 1. A sealing structure is provided between the slip ring 17 and the grain bin 1 to prevent grain from leaking out of the grain bin 1 without affecting the smoothness between the slip ring 17 and the grain bin 1. A rotating shaft 4 18 rotates on one side of the slip ring 17. The connecting rod 16 and the rotating shaft 4 18 are rotatably connected. A spiral blade 19 is fixed to the outer side of shaft 4 18, and a transmission gear 20 is fixed to one end of shaft 4 18. A fixed gear ring 21 is fixed to one side of grain bin 1. The transmission gear 20 and the fixed gear ring 21 mesh with each other. At the same time, shaft 1 3 can drive the connecting rod 16 to rotate, so that the connecting rod 16 can drive the slip ring 17, shaft 4 18 and transmission gear 20 to rotate around shaft 1 3. The transmission gear 20 can rotate under the action of the fixed gear ring 21 it meshes with, so that the transmission gear 20 can drive shaft 4 18 and spiral blade 19 to rotate. The spiral blade 19 rotates around shaft 1 3 and rotates on its own axis, which can stir the grain in grain bin 1, so that the fumigation effect of the medicinal gas on the grain is better and more uniform.

[0028] Example 3

[0029] Please see Figures 1-5As shown, shaft 5 22, bevel gear 6 23, and pulley 1 24 are located on the same axis of rotation. Bevel gear 6 23 meshes with bevel gear 3 11. Shafts 2 8, 3 10, and 5 22 all rotate synchronously. The medicine tank 261 is connected to the output end of the circulating air pump 27. The rotating drum 4, air inlet pipe 26, medicine tank 261, circulating air pump 27, filter box 28, and air outlet pipe 29 form a circulating connection structure. By controlling the circulating air pump 27, the circulating air pump 27 delivers the medicinal gas in the medicine tank 261 to the rotating drum 4 through the air inlet pipe 26. The medicinal gas enters the grain bin 1 through the through pipe 5 and air hole 6, circulates in the grain bin 1, enters the filter box 28 through the air outlet pipe 29, and then returns to the circulating air pump 27 from the filter box 28. This cycle continues. To fumigate the grain in grain silo 1, a filter screen 30 is fixed inside the filter box 28. The filter screen 30 filters dust in the returning chemical gas, preventing dust from entering the circulating air pump 27 and causing damage. Two sliding rods 31 are fixed inside the filter box 28, and sliders 32 slide on the outer sides of the two sliding rods 31. A scraper 33 is fixed on one side of the slider 32, and the scraper 33 is in contact with the surface of the filter screen 30. A limiting groove 34 is provided on one side of the slider 32. A rotating shaft 35 is rotatable on one side of the filter box 28. A rotating rod 36 is fixed at one end of the rotating shaft 35, and a limiting rod 37 is fixed on one side of the rotating rod 36. The limiting rod 37 is slidably connected to the limiting groove 34. The end of the rotating shaft 35 away from the rotating rod 36 is fixed. A bevel gear 38 is fixed, and a rotating shaft 39 rotates on one side of the filter box 28. A bevel gear 40 is fixed to one end of the rotating shaft 39, and the bevel gear 40 meshes with the bevel gear 38. A pulley 41 is fixed to the other end of the rotating shaft 39, and a transmission belt 42 frictionally connects the pulley 41 and the pulley 24. When the motor 2 drives the bevel gear 11 to rotate, the bevel gear 11 simultaneously drives the meshing bevel gear 23 to rotate, causing the bevel gear 23 to drive the rotating shaft 22 and the pulley 24 to rotate. The pulley 24, under the action of the transmission belt 42, drives the pulley 21 to rotate, which in turn drives the rotating shaft 39 and the bevel gear 40 to rotate. Gear 8 40 drives bevel gear 7 38, which meshes with it, to rotate. Bevel gear 7 38 then drives shaft 6 35 and rotating rod 36 to rotate. Rotating rod 36 causes limiting rod 37 to slide repeatedly within limiting groove 34. Limiting rod 37 then drives limiting groove 34 and slider 32 to slide back and forth on sliding rod 31. Sliding rod 32 causes scraper 33 to slide back and forth. Filter screen 30 filters dust from the returning gas, preventing dust from entering the circulating air pump 27. The reciprocating sliding of scraper 33 removes dust adhering to the surface of filter screen 30, preventing clogging. A dust collection box 43 is slidably mounted on one side of filter box 28, located below scraper 33.A sealing structure is provided between the dust collection box 43 and the filter box 28, which prevents the escape of medicinal gas without affecting the smooth movement between the dust collection box 43 and the filter box 28. The dust collection box 43 is used to collect the scraped dust for easy dust treatment.

[0030] In use, this invention controls the circulating air pump 27 to transport the medicinal gas from the medicine tank 261 through the air inlet pipe 26 to the rotating drum 4. The medicinal gas then enters the grain bin 1 through the through pipe 5 and the air hole 6, circulates within the grain bin 1, enters the filter box 28 through the air outlet pipe 29, and then returns to the circulating air pump 27, repeating this cycle. Controlling the motor 2 causes the motor to drive the rotating shaft 3 to rotate, which in turn drives the rotating drum 4 to rotate. This causes the through pipe 5 and the air hole 6 to rotate around the rotating drum 4. Simultaneously, the rotating drum 4 drives the rotating shaft 3 10, the bevel gear 3 11, and the bevel gear 5 13 to rotate around the rotating drum 4. The bevel gear 5 13 can interact with... The bevel gear 15 rotates under the action of the meshing bevel gear 13, causing the bevel gear 5 to drive the rotating shaft 3 10 and bevel gear 3 11 to rotate. The bevel gear 3 11 then drives the meshing bevel gear 4 12 to rotate, which in turn drives the rotating shaft 2 8 to rotate. The rotating shaft 2 8 then drives the bevel gear 2 9 to rotate, which in turn drives the meshing bevel gear 1 7 to rotate. This allows the through pipe 5 and the air hole 6 to rotate around the rotating cylinder 4 while simultaneously rotating on their own axes. At the same time, the rotating shaft 1 3 drives the connecting rod 16 to rotate, which in turn drives the slip ring 1 17, the rotating shaft 4 18, and the transmission gear 20 to rotate around the rotating shaft 3. The transmission gear 20 rotates in a circular motion, causing the fixed gear ring 21 to mesh with it to rotate. This rotation drives the rotating shaft 18 and the spiral blade 19 to rotate, causing the spiral blade 19 to rotate around the rotating shaft 18 and rotate on its own axis. This agitates the grain in the grain bin 1, resulting in better and more even fumigation of the grain with the medicinal gas. Simultaneously, the bevel gear 11 drives the bevel gear 23 to rotate, which in turn drives the rotating shaft 22 and the pulley 24 to rotate. The pulley 24, under the action of the transmission belt 42, drives the pulley 41 to rotate, which in turn drives the rotating shaft 39 and the spiral blade 18 to rotate. The rotation of gear 840 causes bevel gear 840 to drive bevel gear 738, which in turn drives shaft 635 and rotating rod 36 to rotate. Rotating rod 36 causes limiting rod 37 to slide repeatedly within limiting groove 34. Limiting rod 37 causes limiting groove 34 and slider 32 to slide back and forth on sliding rod 31. Sliding rod 32 causes scraper 33 to slide back and forth. Filter screen 30 filters dust in the returning gas, preventing dust from entering the circulating air pump 27. The back and forth sliding of scraper 33 removes dust adhering to the surface of filter screen 30, preventing clogging.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A circulating fumigation device for pest control in grain storage, comprising a grain storage (1), characterized in that, A motor (2) is fixed to one side of the grain silo (1). A rotating shaft (3) is fixed to the output end of the motor (2). An air fumigation assembly is fixed to one end of the rotating shaft (3). The air fumigation assembly includes a rotating cylinder (4). A rotating shaft (10) rotates on one side of the rotating cylinder (4). A bevel gear (11) and a bevel gear (13) are fixed to the two ends of the rotating shaft (10). A fixing rod (14) is fixed to the inner side of the grain silo (1). A bevel gear ring (15) is fixed to one end of the fixing rod (14). A rotating shaft (22) rotates on one side of the grain silo (1). 2) Two ends are respectively fixed with bevel gear six (23) and pulley one (24). Slip ring two (25) slides on the outside of the rotating drum (4). One side of slip ring two (25) is connected to air inlet pipe (26). One end of air inlet pipe (26) is connected to medicine box (261). One side of medicine box (261) is connected to circulating air pump (27). The input end of circulating air pump (27) is connected to filter mechanism. Filter mechanism includes filter box (28). One side of filter box (28) is connected to air outlet pipe (29). One end of air outlet pipe (29) is connected to the inside of grain bin (1).

2. The circulating fumigation device for pest control in grain storage according to claim 1, characterized in that, The first rotating shaft (3) extends into the interior of the grain silo (1), and the first rotating shaft (3) and the grain silo (1) are rotatably connected. The first rotating shaft (3) and the rotating drum (4) are both connected by a motor (2) to form a rotating structure. The interior of the rotating drum (4) is a cavity structure. A through pipe (5) rotates on the inner side of the rotating drum (4). An air hole (6) is provided on the outer side of the through pipe (5). The air hole (6) and the rotating drum (4) are connected by the through pipe (5).

3. The circulating fumigation device for pest control in grain storage according to claim 2, characterized in that, A bevel gear 1 (7) is fixed on the outside of the tube (5), and a rotating shaft 2 (8) rotates on the inside of the rotating drum (4). A bevel gear 2 (9) is fixed on the outside of the rotating shaft 2 (8). There are two bevel gears 2 (9), and each bevel gear 2 (9) meshes with the four bevel gears 1 (7).

4. The circulating fumigation device for pest control in grain storage according to claim 3, characterized in that, The three rotating shafts (10), the three bevel gears (11) and the five bevel gears (13) are located on the same rotation axis. One end of the two rotating shafts (8) is fixed with a four bevel gear (12). The three bevel gears (11) and the four bevel gears (12) mesh with each other, and the five bevel gears (13) mesh with the bevel ring (15).

5. The circulating fumigation device for pest control in grain storage according to claim 4, characterized in that, A connecting rod (16) is fixed to the outside of the rotating shaft (3). A slip ring (17) rotates on one side of the grain bin (1). A rotating shaft (18) rotates on one side of the slip ring (17). The connecting rod (16) and the rotating shaft (18) are rotatably connected. A spiral blade (19) is fixed to the outside of the rotating shaft (18). A transmission gear (20) is fixed to one end of the rotating shaft (18). A fixed gear ring (21) is fixed to one side of the grain bin (1). The transmission gear (20) and the fixed gear ring (21) mesh with each other.

6. The circulating fumigation device for pest control in grain storage according to claim 5, characterized in that, The five rotating shafts (22), the six bevel gears (23) and the first belt pulley (24) are located on the same axis of rotation. The six bevel gears (23) and the three bevel gears (11) mesh with each other. The two rotating shafts (8), the three rotating shafts (10) and the five rotating shafts (22) are all in a synchronous rotation structure.

7. The circulating fumigation device for pest control in grain storage according to claim 6, characterized in that, The medicine box (261) is connected to the output end of the circulating air pump (27), and the rotating drum (4), the air inlet pipe (26), the medicine box (261), the circulating air pump (27), the filter box (28) and the air outlet pipe (29) form a circulating connection structure.

8. The circulating fumigation device for pest control in grain storage according to claim 7, characterized in that, A filter screen (30) is fixed inside the filter box (28). Two sliding rods (31) are fixed inside the filter box (28). A slider (32) slides on the outside of the two sliding rods (31). A scraper (33) is fixed on one side of the slider (32). The scraper (33) is in contact with the surface of the filter screen (30).

9. A circulating fumigation device for pest control in grain storage according to claim 8, characterized in that, The slider (32) has a limiting groove (34) on one side, and the filter box (28) has a rotating shaft (35) on one side. A rotating rod (36) is fixed at one end of the rotating shaft (35), and a limiting rod (37) is fixed on one side of the rotating rod (36). The limiting rod (37) and the limiting groove (34) are slidably connected.

10. A circulating fumigation device for pest control in grain storage according to claim 9, characterized in that, A bevel gear seven (38) is fixed to one end of the rotating shaft six (35) away from the rotating rod (36). A rotating shaft seven (39) rotates on one side of the filter box (28). A bevel gear eight (40) is fixed to one end of the rotating shaft seven (39). The bevel gear eight (40) meshes with the bevel gear seven (38). A belt pulley two (41) is fixed to the other end of the rotating shaft seven (39). A transmission belt (42) is frictionally connected between the belt pulley two (41) and the belt pulley one (24). A dust collection box (43) is slidably arranged on one side of the filter box (28). The dust collection box (43) is located below the scraper (33).

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