Push-feeding type potato seed feeding device and method

Abstract

The present application relates to a kind of push feeding type leak-proof potato sowing device and sowing method, including seed tank, the side of the seed tank is equipped with potato seed metering device, still including push feeding device, driving device and air supply device, the potato tuber in the seed tank is oriented by push feeding device and is pushed to seed taking area from the reseeding area, realizes sowing operation, the push feeding device is crank rocker mechanism, wherein pneumatic telescopic rod is connecting rod, spring is arranged in the pneumatic telescopic rod, the extension of pneumatic telescopic rod is controlled by rotary control valve and spring, this control makes push feeding device not only can push potato tuber from the reseeding area to seed taking area, but also can reduce the damage to potato tuber in the process of push feeding.The sowing operation process of the present application, by rotary control valve and spring compound control the extension of pneumatic telescopic rod, push potato tuber to seed taking area, avoid the damage to potato tuber, reduce the leak rate of potato seed metering device.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, in particular to the field of potato sowing machinery, and specifically to a push-feeding type potato seed feeding device and a seed feeding method for preventing seed leakage. Background Art

[0002] As a promising, high-yield cash crop, potato cultivation and production models and scale are crucial for agricultural restructuring and ensuring food production. With the aging population and urbanization, the agricultural labor force is shrinking significantly, making mechanized sowing the only way to achieve fully mechanized potato production. As the most crucial step in achieving fully mechanized potato production, mechanized sowing directly impacts potato yield and quality.

[0003] To improve planter efficiency, the seed box is enlarged to increase the number of seed potatoes contained within. This increased seed box volume and the resulting increase in tubers can cause tubers to arch in the seed removal area, preventing the seed scoop from reaching them and causing missed tubers. This arching of tubers leading to missed tubers is a common problem with scoop-type seeders. Currently, vibration is a common method for ensuring efficient and continuous seeding. This can mitigate missed tubers to a certain extent, but it lacks directional control. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a push-feeding potato seed feeding device and a seed feeding method for preventing leakage of seeding, which are used for a spoon-belt potato seed metering device.

[0005] The present invention is achieved through the following technical solutions, providing a push-feed type potato seed feeding device with anti-missing sowing, comprising a seed box, a push-feed device, a drive device, and an air supply device. The seed box is fixedly connected to a frame, a potato seeding device is provided on one side of the seed box, the push-feed device comprises a push-feed plate, a pneumatic telescopic rod, a drive shaft, and a crank, the lower end of the push-feed plate is hinged to the frame and is located in the seed box, the push-feed plate swings back and forth between a push limit position close to the potato seeding device and a return limit position away from the potato seeding device, the push rod of the pneumatic telescopic rod is hinged to the frame, the cylinder body of the pneumatic telescopic rod is hinged to the crank, the pneumatic telescopic rod drives the push-feed plate to extend when swinging toward the potato seeding device, begins to retract before reaching the push limit position, and begins to extend before reaching the return limit position, the crank is fixed to the drive shaft, and the drive shaft is connected to the frame; the drive device drives the drive shaft to rotate; and the air supply device provides high-pressure gas to the pneumatic telescopic rod.

[0006] As an optimization, the pneumatic telescopic rod includes a cylinder body, a push rod and a spring, a rotary air control valve is provided inside the crank, an axis hole is provided at the end of the cylinder body, and is hinged to the axis of the crank, the rotary air control valve includes a circumferentially arranged air supply chamber and exhaust chamber, the inner cavity of the cylinder body is alternately connected with the air supply chamber and exhaust chamber of the rotary air control valve through air holes, the exhaust chamber of the rotary air control valve is provided with an exhaust port, a crank cavity connected with the air supply chamber is provided in the crank, and an air inlet connected with the air supply device is provided on the crank.

[0007] As an optimization, the extension and retraction of the pneumatic telescopic rod is controlled by a rotary air control valve and a spring. The reciprocating swinging process of the push-feed plate is divided into three stages, namely the outward inflation section, the exhaust section, and the return inflation section. At the beginning of the outward inflation section, the pneumatic telescopic rod drives the push-feed plate to swing toward the potato seed metering device, the air supply chamber of the rotary air control valve is connected to the air hole, and the pneumatic telescopic rod maintains the maximum extension state, pushing the potato tubers in the seed box from the replanting area to the seed spoon direction; when the push-feed plate moves to the inflation and deflation switching position, the exhaust chamber of the rotary air control valve is connected to the air hole, entering the exhaust section, the pneumatic telescopic rod exhausts air through the exhaust port, and the pneumatic telescopic rod contracts under the control of the spring. After the push-feed plate reaches the push limit position, it begins the return movement, and the push-feed plate moves away from the potato seed metering device; when the push-feed plate moves to the inflation and deflation switching position, the air supply chamber of the rotary air control valve is connected to the air hole, entering the air supply section, and the gas pushes the push-feed plate to quickly reset.

[0008] As an optimization, the crank is provided with a pressure relief valve connected to the crank cavity.

[0009] As an optimization, two sealing rings are installed on the shaft body, and the air supply cavity and the exhaust cavity are both located between the two sealing rings.

[0010] As an optimization, the driving device includes a motor and a reducer, the rotating shaft of the motor is connected to the input shaft of the reducer, the output shaft of the reducer is fixedly connected to a driving gear, and the driving shaft is fixedly connected to a passive gear meshing with the driving gear.

[0011] As an optimization, the air supply device includes an air compressor, and the air compressor outlet is connected to the pneumatic telescopic rod through a gas pipeline.

[0012] As an optimization, two push-feeding plates are provided and arranged side by side laterally, and cranks are fixedly connected to both ends of the drive shaft, and the two cranks are respectively connected to the two push-feeding plates through pneumatic telescopic rods.

[0013] As an optimization, the circumferential angle between the two cranks along the drive shaft is 120 degrees.

[0014] A potato seed feeding method using a push-feeding potato seed feeding device that prevents missed sowing includes the following steps:

[0015] a. Adjust the pressure relief valve to the expected pressure threshold, open the air compressor of the air supply device to produce high-pressure gas, and under the driving of the seedling belt of the potato seedling belt planter, the seed spoon connected with the seedling belt makes the seed taking movement;

[0016] b. The driving device drives the driving shaft to rotate, thereby driving the push feeding plate to swing reciprocatingly through the crank and the pneumatic telescopic rod, rotating the shaft body of the rotary control valve in the shaft body hole at the end of the cylinder body, and alternately connecting the air supply cavity and the exhaust cavity of the rotary control valve outer ring with the inner cavity of the cylinder body through the air hole;

[0017] c. The reciprocating swing process of the push feeding plate is divided into three stages, namely, the go-charging air segment, the exhaust segment and the return-charging air segment. At the beginning of the go-charging air segment, the pneumatic telescopic rod drives the push feeding plate to swing towards the potato seedling belt planter, the air supply cavity of the rotary control valve is connected with the air hole, the pneumatic telescopic rod is kept in the maximum elongation state, and the potato tubers in the seed box are pushed from the reseeding area to the seed spoon direction; when the push feeding plate moves to the charging and discharging conversion position, the exhaust cavity of the rotary control valve is connected with the air hole, enters the exhaust segment, the pneumatic telescopic rod is exhausted through the exhaust port, the pneumatic telescopic rod is contracted under the control of the spring, and after the push feeding plate reaches the push limit position, the return movement is started, the push feeding plate moves away from the potato seedling belt planter; when the push feeding plate moves to the charging and discharging conversion position, the air supply cavity of the rotary control valve is connected with the air hole, enters the air supply segment, and the gas pushes the push feeding plate to reset quickly, and thereafter the next go movement is started.

[0018] d. Repeat the above steps to avoid missing planting and reduce the damage rate of the potato tubers.

[0019] The beneficial effects of the present application are that the push feeding type anti-missing planting potato feeding device and the feeding method can direct the potato tubers in the seed box to the seed taking area, effectively avoid missing planting of the potato seedling belt planter during the operation process, reduce the extrusion on the potato tubers, and reduce the damage rate of the potato tubers. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present application;

[0021] Figure 2 It is a top view of the present application;

[0022] Figure 3 It is a structural schematic diagram of the seed box of the present application;

[0023] Figure 4 It is a schematic diagram of the state of the potato tubers in the seed box of the prior art;

[0024] Figure 5 It is a schematic diagram of the state of the potato tubers in the seed box of the present application;

[0025] Figure 6This is a schematic diagram of the push-feed plate motion state of the present invention;

[0026] Figure 7 This is a front cross-sectional view of the pneumatic telescopic rod of the present invention;

[0027] Figure 8 This is a bottom sectional view of the pneumatic telescopic rod of the present invention;

[0028] Figure 9 Schematic diagram of the structure of the rotary air control valve of the present invention;

[0029] Figure 10 Schematic cross-sectional view of the rotary air control valve of the present invention;

[0030] Figure 11 It is the gas path diagram of the present invention;

[0031] As shown in the figure:

[0032] 1. Frame, 2. Air compressor, 3. Gas pipeline, 4. Seed scoop, 5. Seed box, 6. Crank, 7. Drive shaft, 8. Pneumatic telescopic rod, 9. Push feed plate, 10. Bearing, 11. Spring, 12. Pressure relief valve, 13. Air inlet, 14. Sealing ring, 15. Air hole; 16. Rotary air control valve; 17. Exhaust port. DETAILED DESCRIPTION

[0033] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0034] like Figures 1 to 11 As shown, a push-feeding type potato seed feeding device for preventing leakage of sowing of the present invention comprises a seed box 5, a potato seed meter is provided on one side of the seed box 5, and further comprises a push-feeding device, a driving device and an air supply device.

[0035] like Figure 1 As shown, the potato seed meter adopts a spoon-belt type potato seed meter, and a plurality of seed spoons are fixed on the seed belt. The seed belt drives the seed spoons to move upward to take seeds. The potato seed meter is located on one side of the seed box 5, and the other side of the seed box is the reseeding area. The potato tubers flow from the reseeding area to the seed spoons.

[0036] The seed box 5 is fixed to the frame 1, and a potato seed meter is provided on one side of the seed box 5. The pushing and feeding device includes a pushing and feeding plate 9, a pneumatic telescopic rod 8, a drive shaft 7 and a crank 6. The lower end of the pushing and feeding plate 9 is hinged to the frame 1 and is located in the seed box. The pushing and feeding plate 9 swings back and forth between a pushing limit position close to the potato seed meter and a return limit position away from the potato seed meter.

[0037] The drive shaft 7 is arranged horizontally and is fixedly connected to a crank 6, which is perpendicular to the drive shaft 7. In this example, cranks 6 are fixedly connected to both ends of the drive shaft 7. The two cranks 6 control the movement of two push feeding plates 9 through pneumatic telescopic rods 8 respectively. The circumferential angle between the two cranks along the drive shaft 7 is 120 degrees. Specifically, keyways are provided at both ends of the drive shaft 7, and the keyways at both ends differ by 120 degrees in the circumferential direction. The crank 6 is connected to the end of the drive shaft through a key and a keyway. The push rod of the pneumatic telescopic rod 8 is hinged to the seed box 5, and the cylinder body of the pneumatic telescopic rod 8 is hinged to the crank 6.

[0038] The end of the cylinder body is hinged to the shaft of the crank 6, and a rotary air control valve is provided inside the crank 6. The end of the cylinder body is provided with a shaft hole for the shaft of the crank 6 to pass through. The outer diameter of the shaft is equal to the inner diameter of the shaft hole. The upper and lower ends of the shaft are axially connected to bearings 10 installed on the inner wall of the shaft hole.

[0039] The rotary air control valve 16 has an air supply cavity and an air exhaust cavity arranged circumferentially. Figure 10 As shown, when the air control valve 16 located on the crank 6 is rotated, the air supply chamber and the exhaust chamber are alternately connected to the air hole 15, that is, the air supply chamber and the exhaust chamber are alternately connected to the inner cavity of the cylinder body. To prevent air leakage, two sealing rings 14 are installed on the shaft, and the air supply chamber and the exhaust chamber are each located between the two sealing rings 14.

[0040] The driving device is used to drive the driving shaft 7 to rotate; Figure 1 、 2 As shown in Figure 5, the driving device includes a motor and a reducer, which are both mounted on the frame 1 by bolts. The rotating shaft of the motor is connected to the input shaft of the reducer, the output shaft of the reducer is fixed with a driving gear, and the driving shaft 7 is fixed with a passive gear that meshes with the driving gear.

[0041] The gas supply device is used to provide high-pressure gas to the pneumatic telescopic rod 8. The gas supply device includes an air compressor 2, the outlet of the air compressor is connected to the air inlet 13 of the pneumatic telescopic rod 8 through a gas pipeline 3, and the air inlet 13 is connected to the gas pipeline 3 through a hose.

[0042] The reciprocating swinging process of the push-feed plate is divided into three stages: the outward inflation stage, the exhaust stage, and the return inflation stage. At the beginning of the outward inflation stage, the pneumatic telescopic rod 8 drives the push-feed plate 9 to swing toward the potato seed metering device, the air supply chamber of the rotary air control valve is connected to the air hole 15, and the pneumatic telescopic rod 8 remains in a maximum extension state, pushing the potato tubers in the seed box from the replanting area toward the seed spoon; when the push-feed plate 9 moves to the inflation and deflation switching position, the exhaust chamber of the rotary air control valve is connected to the air hole 15, entering the exhaust stage, the pneumatic telescopic rod 8 exhausts air through the exhaust port 17, and the pneumatic telescopic rod 8 contracts under the control of the spring 11. After the push-feed plate 9 reaches the push limit position, it begins the return movement, moving the push-feed plate 9 away from the potato seed metering device; when the push-feed plate 9 moves to the inflation and deflation switching position, the air supply chamber of the rotary air control valve is connected to the air hole 15, entering the air supply stage, and the gas pushes the push-feed plate 9 to quickly reset, and then begins the next outward movement.

[0043] In the above technical solution, on the one hand, the potato tubers in the seed box are pushed and fed from the replanting area to the seed collection area through the push-feeding device, ensuring that the seed spoon of the spoon-belt potato seeding device can pick up the potato tubers, which can effectively avoid missed sowing and missing seeds; on the other hand, the extension and retraction of the pneumatic telescopic rod 8 is controlled by the spring 11 and the rotary air control valve 16. Before the push-feeding plate 9 reaches the limit position, the pneumatic telescopic rod 8 is deflated under the control of the rotary air control valve 16. In the process of the push-feeding plate 9 continuing to push, the pneumatic telescopic rod 8 is shortened under the control of the internal spring 11, reducing the squeezing of the potato tubers by the push-feeding plate 9.

[0044] like Figure 1-3 As shown, in this embodiment, two pushing and feeding plates 9 are provided and arranged side by side laterally, and the two pushing and feeding plates 9 push alternately to achieve uninterrupted replanting of potato tubers. Figure 4 This is a schematic diagram of the state of potato tubers in a seed box without a push feeding device in the prior art. v is the movement speed of the seed spoon. Figure 5 This is a schematic diagram of the potato tubers in the seed box with a push-feed device. It can be seen that the push-feed plate pushes the potato tubers in the seed box to the seed collection area; Figure 6 As shown in Figure 1, the reciprocating swing process of the push-feed plate is divided into three stages, namely the outward inflation stage, the exhaust stage and the return inflation stage. Figure 7-10 As shown, an exhaust port 17 communicating with the exhaust chamber is provided at the end of the shaft body, a crank cavity communicating with the air supply chamber is provided in the crank 6, the crank cavity is a sealed cavity, and the crank cavity is communicated with the air supply chamber through a communicating hole extending radially along the shaft body, an air inlet 13 communicating with the air supply device is provided on the crank cavity, and high-pressure gas is injected into the crank cavity through the air inlet 13, and a pressure relief valve 12 communicating with the crank cavity is provided on the crank 6, thereby realizing the setting of the pressure threshold; Figure 11This is a gas circuit diagram of an embodiment of the present invention. The high-pressure gas circuit enables the pneumatic telescopic rod to complete a continuous action cycle, ensuring the continuity of the high-pressure gas and the stability of the air pressure value.

[0045] A potato seed feeding method using a push-feeding potato seed feeding device that prevents missed sowing includes the following steps:

[0046] a. Adjust the pressure relief valve to the desired pressure threshold, turn on the air compressor of the air supply device to generate high-pressure gas, and the seeding belt of the spoon-belt potato seeding device drives the seeding spoon connected to the seeding belt to take out the seeds;

[0047] b. The driving device drives the driving shaft 7 to rotate, thereby driving the push feeding plate 9 to swing back and forth through the crank 6 and the pneumatic telescopic rod 8. The shaft of the rotary air control valve rotates in the shaft hole at the end of the cylinder body. The air supply cavity and the exhaust cavity of the outer ring of the rotary air control valve are alternately connected to the inner cavity of the cylinder body through the air hole 15;

[0048] c. The reciprocating swinging process of the push-feed plate 9 is divided into three stages: the outward inflation stage, the exhaust stage, and the return inflation stage. At the beginning of the outward inflation stage, the pneumatic telescopic rod 8 drives the push-feed plate 9 to swing toward the potato seed meter. The air supply chamber of the rotary air control valve is connected to the air hole 15. The pneumatic telescopic rod 8 remains at its maximum extension, pushing the potato tubers in the seed box from the replanting area toward the seed spoon. When the push-feed plate 9 moves to the inflation / deflation switching position, the exhaust chamber of the rotary air control valve is connected to the air hole 15, entering the exhaust stage. The pneumatic telescopic rod 8 exhausts air through the exhaust port 17. The pneumatic telescopic rod 8 contracts under the control of the spring 11. After the push-feed plate 9 reaches the push limit position, it begins its return motion, moving away from the potato seed meter. When the push-feed plate 9 moves to the inflation / deflation switching position, the air supply chamber of the rotary air control valve is connected to the air hole 15, entering the air supply stage. The gas pushes the push-feed plate 9 to quickly reset, and then the next outward motion begins.

[0049] d. Repeat the above steps to avoid missing potatoes during sowing and reduce the damage rate of potato tubers.

[0050] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by adopting existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A push-feeding potato seed feeding device to prevent leakage, characterized by: The invention comprises a seed box (5), a push-feed device, a driving device and an air supply device, wherein the seed box (5) is fixedly connected to a frame (1), a potato seeding device is provided on one side of the seed box (5), the push-feed device comprises a push-feed plate (9), a pneumatic telescopic rod (8), a driving shaft (7) and a crank (6), the lower end of the push-feed plate (9) is hinged to the frame (1), the push-feed plate (9) is located in the seed box (5), and the push-feed plate (9) reciprocates between a push limit position close to the potato seeding device and a return limit position away from the potato seeding device. The push rod of the telescopic rod (8) is hinged to the frame (1), and the cylinder body of the pneumatic telescopic rod (8) is hinged to the crank (6). The pneumatic telescopic rod (8) drives the push feeding plate (9) to extend when swinging in the direction of the potato seeding device, starts to retract before reaching the push limit position, and starts to extend before reaching the return limit position. The crank (6) is fixed to the drive shaft (7), and the drive shaft (7) is axially connected to the frame (1); the drive device drives the drive shaft (7) to rotate; and the air supply device provides high-pressure gas to the pneumatic telescopic rod (8); The pneumatic telescopic rod (8) includes a cylinder body, a push rod and a spring (11), a rotary air control valve (16) is provided inside the crank, an axial hole is provided at the end of the cylinder body, and is hinged to the axis of the crank (6), the rotary air control valve (16) includes a circumferentially arranged air supply cavity and an exhaust cavity, the inner cavity of the cylinder body is alternately connected to the air supply cavity and the exhaust cavity of the rotary air control valve (16) through the air hole (15), the exhaust cavity of the rotary air control valve (16) is provided with an exhaust port (17), a crank cavity connected to the air supply cavity is provided inside the crank (6), and an air inlet (13) connected to the air supply device is provided on the crank; The extension and retraction of the pneumatic telescopic rod (8) is controlled by a rotary air control valve (16) and a spring (11). The reciprocating swing process of the push feeding plate (9) is divided into three stages, namely, the outward inflation stage, the exhaust stage and the return inflation stage. At the beginning of the outward inflation stage, the pneumatic telescopic rod (8) drives the push feeding plate (9) to swing toward the potato seeding device, the air supply cavity of the rotary air control valve (16) is connected with the air hole (15), and the pneumatic telescopic rod (8) maintains the maximum extension state, pushing the potato tubers in the seed box from the reseeding area toward the seed spoon. The push feeding plate (9) When the push-feed plate (9) moves to the inflation / deflation switching position, the exhaust chamber of the rotary air control valve is connected to the air hole (15), entering the exhaust section, and the pneumatic telescopic rod (8) exhausts air through the exhaust port (17). The pneumatic telescopic rod (8) contracts under the control of the spring (11), and the push-feed plate (9) reaches the push limit position and starts the return movement. The push-feed plate (9) moves in the direction away from the potato seed metering device; when the push-feed plate (9) moves to the inflation / deflation switching position, the air supply chamber of the rotary air control valve is connected to the air hole (15), entering the air supply section, and the gas pushes the push-feed plate (9) to quickly reset.

2. A push-feeding potato seed feeding device for preventing missed sowing according to claim 1, characterized in that: The crank (6) is provided with a pressure relief valve (12) which is in communication with the crank cavity.

3. The push-feeding potato seed feeding device for preventing missed sowing according to claim 1, characterized in that: Two sealing rings (14) are mounted on the shaft body, and the air supply cavity and the air exhaust cavity are both located between the two sealing rings (14).

4. The push-feeding potato seed feeding device for preventing missed sowing according to claim 1, characterized in that: The driving device comprises a motor and a reducer, wherein the rotating shaft of the motor is connected to the input shaft of the reducer, the output shaft of the reducer is fixedly connected to a driving gear, and the driving shaft (7) is fixedly connected to a passive gear meshing with the driving gear.

5. The push-feeding potato seed feeding device for preventing missed sowing according to claim 1, characterized in that: The air supply device comprises an air compressor (2), and the outlet of the air compressor is connected to the pneumatic telescopic rod (8) through a gas pipeline (3).

6. The push-feeding potato seed feeding device for preventing missed sowing according to claim 1, characterized in that: The push-feeding plates (9) are provided with two and are arranged side by side in a transverse direction. Cranks (6) are fixedly connected to both ends of the drive shaft (7). The two cranks (6) are respectively connected to the two push-feeding plates (9) via pneumatic telescopic rods (8).

7. A push-feeding potato seed feeding device for preventing missed sowing according to claim 6, characterized in that: The circumferential angle between the two cranks along the drive shaft (7) is 120 degrees.

8. A potato seed feeding method using the push-feeding potato seed feeding device for preventing missed sowing according to claim 1, characterized in that: The steps include: a. Adjust the pressure relief valve to the desired pressure threshold, turn on the air compressor of the air supply device to generate high-pressure gas, and the seeding belt of the spoon-belt potato seeding device drives the seeding spoon connected to the seeding belt to take out the seeds; b. The driving device drives the driving shaft (7) to rotate, thereby driving the push feeding plate (9) to swing back and forth through the crank (6) and the pneumatic telescopic rod (8), the shaft of the rotary air control valve rotates in the cylinder shaft, and the air supply chamber and the exhaust chamber of the rotary air control valve are alternately connected to the cylinder cavity through the air hole (15); c. The reciprocating swinging process of the push feeding plate (9) is divided into three stages, namely, the outward inflation stage, the exhaust stage and the return inflation stage; at the beginning of the outward inflation stage, the pneumatic telescopic rod (8) drives the push feeding plate (9) to swing toward the potato seeding device, the air supply cavity of the rotary air control valve is connected to the air hole (15), and the pneumatic telescopic rod (8) maintains the maximum extension state, pushing the potato tubers in the seed box from the replanting area toward the seed spoon; when the push feeding plate (9) moves to the inflation and deflation switching position, the exhaust cavity of the rotary air control valve is connected to the air hole (15). 5) is connected and enters the exhaust section, the pneumatic telescopic rod (8) exhausts air through the exhaust port (17), the pneumatic telescopic rod (8) contracts under the control of the spring (11), and the push feeding plate (9) reaches the push limit position and starts the return movement, and the push feeding plate (9) moves away from the potato seed metering device; when the push feeding plate (9) moves to the inflation and deflation switching position, the air supply cavity of the rotary air control valve is connected with the air hole (15), enters the air supply section, and the gas pushes the push feeding plate (9) to quickly reset, and then starts the next outward movement; d. Repeat the above steps to avoid missing potatoes during sowing and reduce the damage rate of potato tubers.

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