Push-feeding type anti-miss-seeding potato seed feeding device and seed feeding method

Abstract

The invention relates to a push-feeding type anti-miss-seeding potato seed feeding device and a seed feeding method.The push-feeding type anti-miss-seeding potato seed feeding device comprises a seed box, a potato seed sowing device is arranged on one side of the seed box, the push-feeding type anti-miss-seeding potato seed feeding device further comprises a push-feeding device, a driving device and an air supply device.Potato tubers in the seed box are directionally pushed and fed from a reseeding area to a seed taking area through the push-feeding device, and seed feeding operation is achieved; the pushing and feeding device is a crank rocker mechanism, the pneumatic telescopic rod is a connecting rod, a spring is arranged in the pneumatic telescopic rod, and the pneumatic telescopic rod is controlled by a rotary air control valve and the spring in a compound mode to stretch out and draw back, so that the pushing and feeding device can push and feed potato tubers from a reseeding area to a seed taking area; and moreover, the damage to the potato blocks can be reduced in the pushing and feeding process. In the seed feeding operation process, the rotary air control valve and the spring are combined to control stretching and retracting of the pneumatic telescopic rod, potato blocks are pushed and fed to a seed taking area, damage to the potato blocks is avoided, and the miss-seeding rate of the potato seed metering device is reduced.

Description

Technical Field

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

[0002] Potatoes are high-yield cash crops with development prospects. Their planting and production patterns and scale are of great significance to agricultural structural adjustment and food production. With the development of aging and urbanization, agricultural labor has been greatly reduced. Mechanized sowing is the only way for mechanized potato production. As the most important link in achieving full mechanized potato production, mechanized potato sowing directly affects potato yield and quality.

[0003] In order to improve the working efficiency of the seeder, the volume of the seed box is increased to increase the number of seed potatoes in the seed box. As the volume of the seed box increases, the number of tubers increases, and the tubers form arches in the seed collection area, making it impossible for the seed spoon to pick up the tubers, causing the seeder to miss seeds during the sowing process. Arching of seed potatoes leading to missed seeds is a common problem of spoon-type seeders. Currently, vibration is a common way to ensure effective and continuous sowing operations, which can improve the situation of missed seeds to a certain extent, but there is no directionality. 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 realized by the following technical scheme, and provides a push-feed type potato seed feeding device for preventing leakage, including a seed box, a push-feed device, a driving device and an air supply device. The seed box is fixedly connected to a frame, and a potato seeding device is arranged on one side of the seed box. The push-feed device includes a push-feed plate, a pneumatic telescopic rod, a driving 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, and 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, and starts to shrink before reaching the push limit position, and starts to extend before reaching the return limit position. A crank is fixedly connected to the driving shaft, and the driving shaft is connected to the frame; the driving device drives the driving 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 opened inside the crank, an axial hole is opened at the end of the cylinder body, and 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 opened 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 opened 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, and 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 seeding 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 conversion 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 starts the return movement, and the push-feed plate moves away from the potato seeding device; when the push-feed plate moves to the inflation and deflation conversion 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-feed plates are provided and arranged side by side laterally, and cranks are fixedly connected to both ends of the driving shaft, and the two cranks are respectively connected to the two push-feed 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 type potato seed feeding device for preventing leakage, comprises the following steps: a. Adjust the pressure relief valve to reach the expected pressure threshold, turn on the air compressor of the air supply device to generate high-pressure gas, and drive the seeding belt of the spoon-belt potato seeding device to make the seeding spoon connected to the seeding belt do the seeding movement; b. The driving device drives the driving shaft to rotate, thereby driving the push feeding plate to swing back and forth through the crank and the pneumatic telescopic rod, the shaft body of the rotary air control valve rotates in the shaft body hole at the end of the cylinder body, and the air supply cavity and the exhaust cavity of the outer ring of the rotary air control valve are alternately connected with the cylinder body cavity through the air hole; c. 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 seeding 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 conversion 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, the return movement begins, and the push-feed plate moves away from the potato seeding device; when the push-feed plate moves to the inflation and deflation conversion 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, and then the next outward movement begins.

[0015] d. Repeat the above steps to avoid missing potatoes during sowing and reduce the damage rate of potato tubers.

[0016] The beneficial effects of the present invention are as follows: the push-feeding potato seed feeding device and seed feeding method of the present invention can push and feed the potato tubers in the seed box to the seed collection area in a directional manner, so that the potato seed meter can effectively avoid missing seeds during operation, reduce the squeezing of potato tubers, and reduce the damage rate of potato tubers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 A top view of the present invention; Figure 3 It is a structural schematic diagram of the seed box of the present invention; Figure 4 It is a schematic diagram of the state of potato tubers inside a seed box in the prior art; Figure 5 It is a schematic diagram of the state of potato tubers inside the seed box of the present invention; Figure 6 This is a schematic diagram of the motion state of the push-feed plate of the present invention; Figure 7 It is a front cross-sectional view of the pneumatic telescopic rod of the present invention; Figure 8 This is a bottom sectional view of the pneumatic telescopic rod of the present invention; Fig. 9 It is a structural schematic diagram of the rotary air control valve of the present invention; Fig.10 It is a cross-sectional schematic diagram of the rotary gas control valve of the present invention; Fig.11 It is the gas path diagram of the present invention; As shown in the figure: 1. Frame, 2. Air compressor, 3. Gas pipeline, 4. Seed spoon, 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

[0018] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0019] like Figures 1 to 11 As shown, a push-feeding type leak-proof potato seed feeding device of the present invention comprises a seed box 5, one side of which is provided with a potato seed meter, a push-feeding device, a driving device and an air supply device.

[0020] 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 a replanting area. Potato tubers flow from the replanting area to the seed spoons.

[0021] The seed box 5 is fixedly connected to the frame 1, and a potato seed meter is provided on one side of the seed box 5. The push feeding device includes a push feeding plate 9, a pneumatic telescopic rod 8, a driving shaft 7 and a crank 6. The lower end of the push feeding plate 9 is hinged to the frame 1 and is located in the seed box. The push 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.

[0022] The driving shaft 7 is horizontally arranged and fixedly connected with a crank 6, and the crank 6 is perpendicular to the driving shaft 7. In this example, cranks 6 are fixedly connected to both ends of the driving 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 driving shaft 7 is 120 degrees. Specifically, keyways are provided at both ends of the driving 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 driving 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.

[0023] The end of the cylinder body is hinged with 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 an axial 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 axial hole, and the upper and lower ends of the shaft are axially connected with bearings 10 installed on the inner wall of the axial hole.

[0024] The rotary air control valve 16 has an air supply cavity and an air exhaust cavity arranged circumferentially. Fig.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. In order to prevent air leakage, two sealing rings 14 are installed on the shaft, and the air supply chamber and the exhaust chamber are both located between the two sealing rings 14.

[0025] 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, and the output shaft of the reducer is fixedly connected to a driving gear. A passive gear meshing with the driving gear is fixedly connected to the driving shaft 7.

[0026] 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.

[0027] 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 8 drives the push-feed plate 9 to swing toward the potato seeding device, the air supply chamber of the rotary air control valve is connected with the air hole 15, and the pneumatic telescopic rod 8 maintains the maximum extension state, pushing the potato pieces in the seed box from the replanting area to the seed spoon direction; 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 with the air hole 15, entering the exhaust section, 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, the return movement begins, and the push-feed plate 9 moves away from the potato seeding 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 with the air hole 15, entering the air supply section, and the gas pushes the push-feed plate 9 to quickly reset, and then the next outward movement begins.

[0028] In the above technical scheme, on the one hand, the potato tubers in the seed box are pushed and fed from the replanting area to the seed collection area by the push-feeding device, ensuring that the seed spoon of the spoon-belt potato seed metering device can pick up the potato tubers, which can effectively avoid missed planting 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. When the push-feeding plate 9 continues 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.

[0029] like Figure 1-3 As shown, in this embodiment, two push-feed plates 9 are provided and arranged side by side laterally, and the two push-feed plates 9 push alternately to achieve uninterrupted replanting of potato tubers. Figure 4 : 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 Schematic diagram of the state of potato tubers in a 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 FIG. 1 , the reciprocating swinging process of the push-feed plate is divided into three stages, namely, the outward air filling stage, the exhaust stage and the return air filling stage; Figure 7-10 As shown, an exhaust port 17 connected to the exhaust cavity is opened at the end of the shaft body, a crank cavity connected to the air supply cavity is arranged in the crank 6, the crank cavity is a closed cavity, the crank cavity is connected to the air supply cavity through a connecting hole extending along the radial direction of the shaft body, an air inlet 13 connected to the air supply device is opened 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 connected to the crank cavity is installed on the crank 6, so as to realize the setting of the pressure threshold; Fig.11 This 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, thereby ensuring the continuity of the high-pressure gas and the stability of the gas pressure value.

[0030] A potato seed feeding method, using a push-feeding type potato seed feeding device for preventing leakage, comprises the following steps: a. Adjust the pressure relief valve to reach the expected pressure threshold, turn on the air compressor of the air supply device to generate high-pressure gas, and drive the seeding belt of the spoon-belt potato seeding device to make the seeding spoon connected to the seeding belt do the seeding movement; 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, and the shaft of the rotary air control valve rotates in the shaft hole at the end of the cylinder body, and the air supply cavity and the exhaust cavity of the outer ring of the rotary air control valve are alternately connected with the cylinder body cavity through the air hole 15; c. The reciprocating swinging process of the push-feed plate 9 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 8 drives the push-feed plate 9 to swing toward the potato seeding device, the air supply chamber of the rotary air control valve is connected with the air hole 15, and the pneumatic telescopic rod 8 maintains the maximum extension state, pushing the potato pieces in the seed box from the replanting area to the seed spoon direction; 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 with the air hole 15, entering the exhaust section, 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, the return movement begins, and the push-feed plate 9 moves away from the potato seeding 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 with the air hole 15, entering the air supply section, and the gas pushes the push-feed plate 9 to quickly reset, and then the next outward movement begins.

[0031] d. Repeat the above steps to avoid missing potatoes during sowing and reduce the damage rate of potato tubers.

[0032] 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 using existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme 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 for preventing leakage, characterized in that: 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 seed metering 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), the push-feed plate (9) reciprocates between a push limit position close to the potato seed metering device and a return limit position away from the potato seed metering device, and the pneumatic telescopic rod (8) is driven by a driving shaft (7) and a crank (6). 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, and starts to retract before reaching the push limit position, and starts to extend before reaching the return limit position. The crank (6) is fixedly connected 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).

2. A push-feeding potato seed feeding device for preventing leakage of sowing according to claim 1, characterized in that: The pneumatic telescopic rod (8) comprises a cylinder body, a push rod and a spring (11); a rotary air control valve (16) is provided inside the crank; an axial body 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) comprises 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 an 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.

3. A push-feeding potato seed feeding device for preventing leakage of sowing according to claim 2, characterized in that: The extension and retraction of the pneumatic telescopic rod (8) is controlled by the rotary air control valve (16) and the spring (11), and 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 in the direction of the potato seed metering 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 pieces in the seed box from the replanting area to the seed spoon direction; 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 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.

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

5. A push-feeding potato seed feeding device for preventing leakage of sowing according to claim 2, 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).

6. A push-feeding potato seed feeding device for preventing leakage of sowing according to claim 1, characterized in that: The driving device comprises 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 (7) is fixedly connected to a driven gear meshing with the driving gear.

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

8. A push-feeding potato seed feeding device for preventing leakage of sowing according to claim 1, characterized in that: Two push-feed plates (9) are provided and 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-feed plates (9) via pneumatic telescopic rods (8).

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

10. A potato seed feeding method, using the push-feeding potato seed feeding device for preventing leakage of sowing as claimed in claim 2, characterized in that: The steps include: a. Adjust the pressure relief valve to reach the expected pressure threshold, turn on the air compressor of the air supply device to generate high-pressure gas, and drive the seeding belt of the spoon-belt potato seeding device to make the seeding spoon connected to the seeding belt do the seeding movement; 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 body of the rotary air control valve rotates in the cylinder shaft body, 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 air filling stage, the exhaust stage and the return air filling stage. At the beginning of the forward inflation section, the pneumatic telescopic rod (8) drives the push-feed plate (9) to swing in the direction of the potato seeding device, the air supply chamber of the rotary air control valve is connected to the air hole (15), the pneumatic telescopic rod (8) maintains the maximum extension state, and pushes the potato pieces in the seed box from the replanting area to the seed spoon direction; when the push-feed plate (9) moves to the inflation and deflation conversion position, the exhaust chamber of the rotary air control valve is connected to the air hole (15), 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-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 seeding device; when the push-feed plate (9) moves to the inflation and deflation conversion position, the air supply chamber of the rotary air control valve is connected to the air hole (15), enters the air supply section, the gas pushes the push-feed plate (9) to quickly reset, and then starts the next forward movement. d. Repeat the above steps to avoid missing potatoes during sowing and reduce the damage rate of potato tubers.

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