A plant protection drone's spiral feeding blow-type seeding device

Abstract

This invention discloses a spiral-feeding, blow-type seeding device for a plant protection drone, comprising a seed box, with multiple spiral feeding shafts located below the seed box. The spiral feeding shafts are fixed to the rotating shaft of a rotating mechanism via a first one-way bearing. The inlet of each spiral feeding shaft is connected to the outlet at the bottom of the seed box. A telescopic cylinder is located below the outlet of each spiral feeding shaft. An air blowing hole is located at the upper end of the telescopic cylinder, and an acceleration tube is located at the bottom of the telescopic cylinder. A guide tube for adjusting the seed spray angle is located at the lower end of the acceleration tube. A second one-way bearing is sleeved on the rotating shaft, and a winding mechanism is fixed to the second one-way bearing. The traction rope of the winding mechanism is fixed to the lower end of the telescopic cylinder. Compared with existing technologies, this invention has an ingenious structural design, simplifying the overall structure and ensuring seeding effectiveness while reducing the weight of the drone.

Description

Technical Field

[0001] This invention relates to the field of drone seeding technology, and in particular to a spiral feeding blow-type seeding device for a plant protection drone. Background Technology

[0002] In agriculture, agricultural drones are commonly used to replace manual aerial operations. These drones can be remotely controlled from the ground or controlled by flight, enabling seeding operations. Compared to ground machinery, they offer better mobility, avoiding getting stuck and preventing damage to field ridges. Furthermore, drone seeding is fast and easy to operate, and is gradually being accepted by farmers, becoming a new seeding method, particularly suitable for paddy fields in southern my country characterized by small plots, large elevation differences, and deep mud. Currently, drone seeding is mainly broadcasting, with seed dispensing devices primarily divided into centrifugal and pneumatic types. Chinese patent CN109287211B discloses a pneumatic acceleration seeding device for wheat, where wheat seeds are accelerated by a high-pressure airflow and injected into the soil, used for no-till wheat seeding in rice-wheat rotation areas without straw mulch. Chinese patent CN209643328U discloses a seed directing device that can be mounted on drones or ground machinery and allows control over the opening and closing size and frequency of the seed dispensing nozzle. This device uses a fan to accelerate the seeds, reducing the impact of wind on the drone. After the seeds emerge from the device using either of the two methods described above, they are close to the drone's propellers and subject to significant interference from the rotor wind. The pneumatic method of accelerating the seeds has limited acceleration capability, resulting in poor seed formation. Increasing seed speed and reducing the impact of rotor wind on seed descent would require a more complex acceleration device, which would significantly increase the drone's weight.

[0003] Therefore, it is necessary to provide a new spiral feeding blow-type seeding device for agricultural drones to solve the above-mentioned technical problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a spiral feeding blow-type seeding device for agricultural drones, which addresses the shortcomings of the prior art and solves the problems of poor row formation or complex structure of the seeding devices in the prior art during the sowing operation.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: a spiral feeding and blowing seeding device for a plant protection drone, including a seed box, with multiple spiral feeding shafts below the seed box. The spiral feeding shafts are fixed to the rotating shaft of a rotating mechanism via a first one-way bearing. The inlet of the spiral feeding shaft is connected to the outlet at the bottom of the seed box. A telescopic cylinder is provided below the outlet of the spiral feeding shaft. An air blowing hole is provided at the upper end of the telescopic cylinder. An acceleration tube is provided at the bottom of the telescopic cylinder. A guide tube for adjusting the seed spraying angle is provided at the lower end of the acceleration tube. A second one-way bearing is sleeved on the rotating shaft. A winding mechanism is fixed on the second one-way bearing. The traction rope of the winding mechanism is fixed to the lower end of the telescopic cylinder, the acceleration tube, or the guide tube.

[0006] Preferably, the guide tube is divided into a first guide tube, a second guide tube, and a third guide tube. The second guide tube is located between the first guide tube and the third guide tube. The second guide tube is perpendicular to the ground. The angle between the first guide tube and the second guide tube is the same as the angle between the third guide tube and the second guide tube. The inclination directions of the first guide tube and the third guide tube are opposite.

[0007] Preferably, the air pressure at the second guide tube is lower than the air pressure at the first guide tube and the third guide tube.

[0008] Preferably, when there are multiple first guide tubes and third guide tubes, the air pressure at the first guide tube gradually increases from the side closer to the second guide tube to the other side, and the air pressure at the third guide tube gradually increases from the side closer to the second guide tube to the other side.

[0009] Preferably, the winding mechanism includes a winding drum, which is fixed to a second one-way bearing. The rotating mechanism includes an outer cylinder, with the winding drum disposed inside the outer cylinder. A lead hole is provided on one side of the outer cylinder. One end of the traction rope is fixed to the winding drum, and the other end passes through the lead hole and is fixed to the lower end of the telescopic cylinder or the acceleration tube.

[0010] Preferably, the upper end of the telescopic cylinder is provided with a wire hole, through which the traction rope passes.

[0011] Preferably, there are two traction ropes, and the two lead holes are respectively located on both sides of the outer cylinder.

[0012] Preferably, the telescopic cylinder comprises multiple cylinders, with two adjacent cylinders slidably connected, and the height of the outer cylinder is greater than the height of the inner cylinder.

[0013] Preferably, the upper end of the cylinder is provided with a guide slope.

[0014] Preferably, a protrusion and a guide groove are provided between the two cylinders, and the protrusion slides along the guide groove.

[0015] Compared to existing technologies, in this invention, when seeding is not required, such as during drone flight, the motor drives the rotating shaft to rotate counterclockwise, simultaneously rotating the second one-way bearing. The rotation of the second one-way bearing drives the winding drum to rotate, and the traction rope, wound around the winding drum, pulls the telescopic drum upward, thus retracting the telescopic drum. After retraction, the motor stops working, the telescopic drum remains in the retracted state, and the screw feed shaft does not rotate. When seeding is required, the motor drives the rotating shaft to rotate clockwise, rotating the first one-way bearing. The rotating shaft releases the constraint on the second one-way bearing, and under the action of gravity, the acceleration tube drives the traction rope downward. The traction rope, through the winding drum, drives the second one-way bearing to rotate clockwise, completing the extension of the telescopic drum and moving the guide tube away from the blades. The rotation of the first one-way bearing drives the spiral feeding shaft to rotate. Seeds in the seed box fall from the discharge port into the feed port of the spiral feeding shaft, and are then conveyed to the discharge port. From the discharge port, the seeds fall into the telescopic cylinder. High-pressure gas is ejected from the air blower to blow the seeds downwards. The seeds are accelerated inside the telescopic cylinder, and further accelerated after reaching the acceleration tube. They are then sprayed onto the ground along the guide tube, completing the sowing. Before sowing, this invention adjusts the distance between the guide tube and the seed box, keeping the guide tube away from the blades to reduce the interference of the rotor wind on the seeds. Then, high-pressure gas acceleration reduces the seed's air time, further reducing the impact of the rotor wind on the seeds, thus ensuring good seed row formation. The telescopic cylinder reduces the acceleration requirements for the seeds; a simple air acceleration device is sufficient to achieve good seed row formation. This invention, by setting the spiral feeding shaft and winding mechanism on the rotating shaft, combined with the first and second one-way bearings, completes both feeding and the extension and retraction of the telescopic cylinder. This ingenious structural design simplifies the overall structure, ensuring sowing effectiveness while reducing the weight of the drone. Secondly, the telescopic cylinder can extend simultaneously with sowing, resulting in high efficiency. Thirdly, seed acceleration is simple, reliable, and yields good sowing results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 for Figure 1 Cross-sectional view along the KK line;

[0018] Figure 3 This is a partial structural schematic diagram of the present invention;

[0019] Figure 4 This is a cross-sectional schematic diagram of the present invention;

[0020] Figure 5 for Figure 2 Enlarged schematic diagram of the structure at point F;

[0021] Figure 6 for Figure 3 Enlarged schematic diagram of the structure at point G;

[0022] Figure 7 for Figure 4 Enlarged schematic diagram of the structure at point H;

[0023] Figure 8 for Figure 2 A partial structural diagram;

[0024] Figure 9 This is a cross-sectional schematic diagram of the telescopic cylinder of the present invention;

[0025] Figure 10 This is a schematic diagram of the structure of the guide tube for spraying seeds according to the present invention.

[0026] In the picture:

[0027] 1. Seed box, 2. Spiral feed shaft, 21. Inlet, 22. Outlet, 3. Rotating mechanism, 31. Rotating shaft, 32. Outer cylinder, 33. Motor, 321. Lead wire hole, 4. Telescopic cylinder, 41. Cylinder body, 411. Guide slope, 42. Protrusion, 43. Sealing gasket, 5. Accelerating tube, 6. Guide tube, 7. Winding mechanism, 71. Traction rope, 72. Winding drum, 73. Wire hole, 100. Air blowing hole, 8. Air guide tube. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] See attached document Figure 1 Appendix Figure 4 and attached Figure 7This embodiment provides a spiral feeding and blowing seeding device for an agricultural drone, including a seed box 1. Multiple spiral feeding shafts 2 are located below the seed box 1. The spiral feeding shafts 2 are fixed to the rotating shaft 31 of a rotating mechanism 3 via a first one-way bearing. The inlet 21 of the spiral feeding shaft 2 is connected to the discharge port at the bottom of the seed box 1. A telescopic cylinder 4 is located below the outlet 22 of the spiral feeding shaft 2. An air blowing hole 100 is located at the upper end of the telescopic cylinder 4 and is connected to an air pump. An acceleration tube 5 is located at the bottom of the telescopic cylinder 4. 5 is used to accelerate the seeds. Specifically, the inner diameter of the acceleration tube 5 gradually decreases from top to bottom. The lower end of the acceleration tube 5 is equipped with a guide tube 6 for adjusting the seed spray angle. The second one-way bearing is sleeved on the rotating shaft 31. A winding mechanism 7 is fixed on the second one-way bearing. The traction rope 71 of the winding mechanism 7 is fixed to the lower end of the telescopic cylinder 4, or the acceleration tube 5, or the guide tube 6. The traction rope 71 pulls the lower end of the telescopic cylinder 4, making it easy for the telescopic cylinder 4 to retract. When the traction rope 71 is fixed to the acceleration tube 5 or the guide tube 6, it can also achieve the effect of pulling the lower end of the telescopic cylinder 4. The telescopic cylinder 4 is used to adjust the distance between the guide tube 6 and the seed box 1. The rotation of the rotating shaft 31 drives the first one-way bearing to rotate (assuming clockwise rotation), thereby driving the screw feeding shaft 2 to rotate clockwise. However, the rotating shaft 31 rotates within the second one-way bearing, that is, the rotating shaft 31 does not drive the second one-way bearing to rotate. At the beginning of the sowing stage, the telescopic cylinder 4 extends downwards under the weight of the telescopic cylinder 4, the acceleration tube 5, and the guide tube 6. The traction rope 71 of the winding mechanism 7 pulls downwards, and the winding mechanism 7 unwinds the line while simultaneously driving the second one-way bearing to rotate clockwise. When the telescopic cylinder 4 extends to its limit position, the second one-way bearing stops rotating clockwise. This setting keeps the guide tube 6 far away from the UAV's propellers, effectively reducing interference from the rotor wind. When the spiral feeding shaft 2 rotates clockwise, the seeds in the seed box 1 fall from the discharge port into the feed port 21 of the spiral feeding shaft 2, and are then conveyed by the spiral feeding shaft 2 to the discharge port 22. The seeds fall from the discharge port 22 into the telescopic cylinder 4, and the air blowing hole 100 sprays high-pressure gas to blow the seeds downwards. The seeds accelerate inside the telescopic cylinder 4, and after reaching the acceleration tube 5, they are further accelerated, and then sprayed onto the ground along the guide tube 6, completing the sowing. During this process, the pressure inside the telescopic cylinder 4 is greater than the external pressure. If the telescopic cylinder 4 does not fully extend under the influence of gravity, it will continue to extend under this pressure. After sowing is complete, the rotating shaft 31 rotates counterclockwise, causing the second one-way bearing to rotate counterclockwise, while the first one-way bearing does not rotate and the screw feeding shaft 2 does not feed. The counterclockwise rotation of the second one-way bearing drives the traction rope 71 to pull the lower end of the telescopic cylinder 4 upward, completing the retraction of the telescopic cylinder 4. The closer the guide tube 6 is to the blade, the greater the interference from the rotor wind; the farther away from the blade, the less interference from the rotor wind. This invention adjusts the distance between the guide tube 6 and the seed box 1 before sowing, so that the guide tube 6 is far away from the blade, reducing the interference of the rotor wind on the seeds.Then, high-pressure gas is used for acceleration, reducing the seed's airtime and further minimizing the impact of rotor wind on the seeds, thus ensuring good seed row formation. The telescopic cylinder 4 reduces the acceleration requirements for seeds; a simple air acceleration device is sufficient to achieve the desired row formation. This invention, by setting a spiral feeding shaft 2 and a winding mechanism 7 on the rotating shaft 31, along with a first and second one-way bearing, simultaneously completes feeding and extends / retracts the telescopic cylinder 4. This ingenious design simplifies the overall structure, ensuring effective sowing while reducing the drone's weight. Secondly, the extension of the telescopic cylinder 4 is achieved simultaneously with sowing, resulting in high efficiency. Thirdly, seed acceleration is simple, reliable, and produces good sowing results. Fourthly, quantitative feeding via the spiral feeding shaft 2 ensures uniform sowing.

[0030] As another embodiment of the present invention: refer to the appendix Figure 10 The guide tube 6 is divided into a first guide tube, a second guide tube, and a third guide tube. The distance between the first, second, and third guide tubes is equal. The second guide tube is located between the first and third guide tubes and is perpendicular to the ground. The angles between the first and second guide tubes are the same as the angles between the third and second guide tubes. The tilt directions of the first and third guide tubes are opposite. Under the action of a rotorless wind, this structural design ensures that the seeds ejected from each guide tube 6 maintain a consistent spacing after landing on the ground.

[0031] In another embodiment of the present invention, the air pressure at the second guide tube is lower than that at the first and third guide tubes. The second guide tube is located in the middle position. After the seeds are ejected from the second guide tube, their travel distance L is shorter than that of the seeds ejected from the first guide tube. Increasing the air pressure at the first and third guide tubes helps to increase the seed ejection speed, so as to ensure that the seeds from each guide tube 6 can reach the ground simultaneously, that is, the air time of the seeds from each guide tube 6 is consistent. The reason for this structural design is that during the seed's fall, it is often affected by ground wind (crosswind), which may deflect the seeds. Setting the air time to be consistent can effectively ensure that the offset distance of the seeds from each guide tube 6 is consistent, thereby effectively ensuring the seed formation effect.

[0032] In another embodiment of the present invention: when there are multiple first guide tubes and third guide tubes, the air pressure at the first guide tube gradually increases from the side closer to the second guide tube to the other side, and the air pressure at the third guide tube gradually increases from the side closer to the second guide tube to the other side. In this embodiment, there are 5 guide tubes 6, so there are two first guide tubes and two third guide tubes. The guide tubes 6 are named A, B, C, D and E from left to right. A and B are the first guide tubes, C is the second guide tube, and D and E are the third guide tubes. The air pressure at A is greater than the air pressure at B, the air pressure at E is greater than the air pressure at D, and the air pressure at B and D is greater than the air pressure at C. The angle between B and C is equal to the angle between C and D, and the angle between A and C is equal to the angle between C and E.

[0033] As another embodiment of the present invention: refer to the appendix Figure 2 Appendix Figure 5 and attached Figure 6 The winding mechanism 7 includes a winding drum 72, which is fixed to a second one-way bearing. The rotating mechanism 3 also includes an outer cylinder 32, inside which the winding drum 72 is located. A lead-in hole 321 is provided on one side of the outer cylinder 32. One end of the traction rope 71 is fixed to the winding drum 72, and the other end passes through the lead-in hole 321 and is fixed to the lower end of the telescopic drum 4 or the accelerating tube 5. The second one-way bearing rotates counterclockwise, causing the winding drum 72 to rotate. The traction rope 71 is wound around the winding drum 72, pulling the lower end of the telescopic drum 4 upwards, thus retracting the telescopic drum 4. When the rotating shaft 31 rotates clockwise, initially, under the influence of gravity, the telescopic drum 4 extends downwards, pulling the traction rope 71 downwards. The traction rope 71 drives the winding drum 72 to rotate clockwise, thereby driving the second one-way shaft to rotate clockwise. The rotational speed of the second one-way shaft is not greater than the rotational speed of the rotating shaft 31.

[0034] Specifically, the upper end of the telescopic cylinder 4 is provided with a wire hole 73, through which the traction rope 71 passes. The wire hole 73 is provided to allow the traction rope 71 to move along the inner wall of the telescopic cylinder 4 as much as possible, thereby reducing the impact on the falling seeds.

[0035] In another embodiment of the present invention, there are two traction ropes 71, with two lead holes 321 respectively located on both sides of the outer cylinder 32. Specifically, one traction rope 71 enters the upper part of the winding drum 72 through one lead hole 321 and then winds around the winding drum 72, while the other traction rope 71 enters the lower part of the winding drum 72 through the other lead hole 321 and then winds around the winding drum 72. The two traction ropes 71 pull on both sides of the telescopic drum 4 respectively. This arrangement allows the telescopic drum 4 to experience a more even tension, facilitating the retraction of the telescopic drum 4.

[0036] In another embodiment of the present invention, a pulley is provided at the position where the traction rope 71 contacts the lead wire hole 321, and a pulley is provided at the position where the traction rope 71 contacts the lead wire hole 73. The rotating pulleys can reduce friction and facilitate the up and down movement of the traction rope 71.

[0037] In another embodiment of the present invention, the telescopic cylinder 4 includes multiple cylinders 41, with adjacent cylinders 41 slidably connected. The height of the outer cylinder 41 is less than the height of the inner cylinder 41, and the height of the innermost cylinder 41, including the guide tube 6 and the acceleration tube 5, is less than the height of the outermost cylinder 41. After the telescopic cylinder 4 is retracted, the guide tube 6 is located inside the telescopic cylinder 4, thereby effectively reducing the height of the telescopic cylinder 4 after retraction. The traction rope 71 is fixed to the innermost cylinder 41.

[0038] For details, please refer to the appendix. Figure 8 The upper end of the cylinder 41 is provided with a guide slope 411, which can effectively prevent seeds from accumulating at the upper end of the cylinder 41.

[0039] For details, please refer to the appendix. Figure 9 A protrusion 42 and a guide groove are provided between the two cylinders 41. The protrusion 42 slides along the guide groove. During the sliding process of the cylinder 41, the protrusion 42 plays a guiding role and prevents the cylinder 41 from rotating during the sliding process.

[0040] Specifically, a sealing gasket 43 is provided between the two cylinders 41. This arrangement helps to improve the sealing between the cylinders 41. During the sowing process, the high air pressure inside the telescopic cylinder 4 will also make the two cylinders 41 connect more tightly, thereby ensuring the sealing between the cylinders 41.

[0041] As another embodiment of the present invention: the guide tube 6 is threadedly connected to the acceleration tube 5, and the inner diameter of the guide tube 6 is smaller than the inner diameter of the acceleration tube 5 and the telescopic cylinder 4. By replacing the guide tube 6, it is convenient to spray seeds of different particle sizes.

[0042] Specifically, one end of the air blowing hole 100 faces the direction of the acceleration tube 5, and the other end is connected to the air guide tube 8 on the telescopic cylinder 4. There are multiple air blowing holes 100, which are evenly distributed on the inner side of the telescopic cylinder 4. The air guide tube 8 is connected to the air pump.

[0043] As another embodiment of the present invention: the air guide pipe 8 is provided with a solenoid valve and a pressure regulating valve, and the outlet pressure of the air guide pipe 8 is adjusted by the pressure regulating valve.

[0044] As another embodiment of the present invention: refer to the appendix Figure 3 The rotating mechanism 3 includes a motor 33, which drives the rotating shaft 31 to rotate. The motor 33 and the outer cylinder 32 are respectively fixed to the seed box 1.

[0045] In this invention, when sowing is not required, such as during drone flight, motor 33 drives rotating shaft 31 to rotate counterclockwise, synchronously driving the second one-way bearing to rotate. The rotation of the second one-way bearing drives the winding drum 72 to rotate, and the traction rope 71, wound around the winding drum 72, pulls the telescopic drum 4 upward, thus retracting the telescopic drum 4. After retraction, motor 33 stops working, the telescopic drum 4 remains in the retracted state, and the screw feed shaft 2 does not rotate. When sowing is required, motor 33 drives rotating shaft 31 to rotate clockwise, driving the first one-way bearing to rotate. Rotating shaft 31 releases the restriction on the second one-way bearing. Under the action of gravity, the acceleration tube 5 drives the traction rope 71 to move downward. The traction rope 71, through the winding drum 72, drives the second one-way bearing to rotate clockwise, completing the extension of the telescopic drum 4 and moving the guide tube 6 away from the blade. The rotation of the first one-way bearing drives the spiral feeding shaft 2 to rotate. Seeds in the seed box 1 fall from the discharge port into the feed port 21 of the spiral feeding shaft 2, and are then conveyed by the spiral feeding shaft 2 to the discharge port 22. The seeds fall from the discharge port 22 into the telescopic cylinder 4. High-pressure gas is ejected from the air blowing hole 100 to blow the seeds downwards. The seeds are accelerated inside the telescopic cylinder 4, and further accelerated after reaching the acceleration tube 5. They are then sprayed onto the ground along the guide tube 6, completing the sowing process. Before sowing, this invention adjusts the distance between the guide tube 6 and the seed box 1, keeping the guide tube 6 away from the blades to reduce the interference of the rotor wind on the seeds. Then, high-pressure gas acceleration reduces the seed's air time, further reducing the impact of the rotor wind on the seeds, thus ensuring the seed row formation effect. The telescopic cylinder 4 reduces the acceleration requirements for the seeds; a simple air acceleration device is sufficient to achieve the desired seed row formation. This invention utilizes a spiral feeding shaft 2 and a winding mechanism 7 mounted on a rotating shaft 31, along with a first and a second one-way bearing, to simultaneously feed material and extend and retract the telescopic cylinder 4. This ingenious design simplifies the overall structure, ensuring effective seeding while reducing the drone's weight. Secondly, the extension of the telescopic cylinder 4 occurs simultaneously with seeding, resulting in high efficiency. Thirdly, seed acceleration is simple, reliable, and yields excellent seeding results.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spiral feeding and blowing seeding device for an agricultural drone, characterized in that, The device includes a seed box, with multiple spiral feeding shafts located below the seed box. The spiral feeding shafts are fixed to the rotating shaft of a rotating mechanism via a first one-way bearing. The inlet of the spiral feeding shaft is connected to the outlet at the bottom of the seed box. A telescopic cylinder is located below the outlet of the spiral feeding shaft. An air blowing hole is located at the upper end of the telescopic cylinder. An acceleration tube is located at the bottom of the telescopic cylinder. A guide tube for adjusting the seed spray angle is located at the lower end of the acceleration tube. A second one-way bearing is sleeved on the rotating shaft. A winding mechanism is fixed on the second one-way bearing. The traction rope of the winding mechanism is fixed to the lower end of the telescopic cylinder, the acceleration tube, or the guide tube. The first one-way bearing rotates in the opposite direction to the second one-way bearing.

2. The spiral feeding and blowing seeding device for agricultural drones according to claim 1, characterized in that, The guide tube is divided into a first guide tube, a second guide tube, and a third guide tube. The second guide tube is located between the first guide tube and the third guide tube. The second guide tube is perpendicular to the ground. The angle between the first guide tube and the second guide tube is the same as the angle between the third guide tube and the second guide tube. The inclination directions of the first guide tube and the third guide tube are opposite.

3. The spiral feeding and blowing seeding device for agricultural drones according to claim 2, characterized in that, The air pressure at the second guide tube is lower than the air pressure at the first guide tube and the third guide tube.

4. The spiral feeding and blowing seeding device for agricultural drones according to claim 3, characterized in that, When there are multiple first guide tubes and third guide tubes, the air pressure at the first guide tube gradually increases from the side closer to the second guide tube to the other side, and the air pressure at the third guide tube gradually increases from the side closer to the second guide tube to the other side.

5. The spiral feeding and blowing seeding device for agricultural drones according to claim 1, characterized in that, The winding mechanism includes a winding drum, which is fixed to a second one-way bearing. The rotating mechanism includes an outer cylinder, in which the winding drum is located. A lead hole is provided on one side of the outer cylinder. One end of the traction rope is fixed to the winding drum, and the other end passes through the lead hole and is fixed to the lower end of the telescopic cylinder or the acceleration tube.

6. The spiral feeding and blowing seeding device for agricultural drones according to claim 5, characterized in that, The upper end of the telescopic cylinder is provided with a wire hole, through which the traction rope passes.

7. The spiral feeding and blowing seeding device for agricultural drones according to claim 6, characterized in that, There are two traction ropes, and the two lead holes are respectively located on both sides of the outer cylinder.

8. The spiral feeding and blowing seeding device for agricultural drones according to claim 1, characterized in that, The telescopic cylinder includes multiple cylinders, with two adjacent cylinders slidably connected, and the height of the outer cylinder is greater than the height of the inner cylinder.

9. The spiral feeding and blowing seeding device for agricultural drones according to claim 8, characterized in that, The upper end of the cylinder is provided with a guide slope.

10. The spiral feeding and blowing seeding device for agricultural drones according to claim 9, characterized in that, A protrusion and a guide groove are provided between the two cylinders, and the protrusion slides along the guide groove.

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