Electrically-driven double-airway vegetable precision seed-metering device

Abstract

The present application relates to the technical field of seeding device, and particularly relates to an electric driving double-air-channel vegetable precision seed sowing device. The present application aims to provide an electric driving double-air-channel vegetable precision seed sowing device, which effectively improves the seed filling rate, realizes precise seed filling, and compared with brush seed cleaning, the air knife seed cleaning can reduce the seed damage and avoid seed damage or inaccurate seed sowing caused by excessive local airflow. The electric driving double-air-channel vegetable precision seed sowing device comprises a rack (1), a transmission device (2), an air suction seed filling device (3), an air blowing seed sowing mechanism (4), an air source mechanism and a control mechanism.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of seeding devices, in particular to an electrically-driven double-air-channel vegetable precision seed sowing device. BACKGROUND

[0002] At present, vegetable production in China mainly relies on facilities such as greenhouses and arched sheds. These facilities can improve the yield and quality of crops to a certain extent by simulating suitable growth environments. However, due to the lack of pneumatic devices, traditional seeding methods often result in low filling rates, uneven seeding and low efficiency, which cannot meet the demand for high efficiency and precision agriculture in modern agriculture. For example, the Chinese utility model patent "a novel vegetable seed sowing device" (application number: CN201822175083.4) has a low filling rate and uneven seeding. SUMMARY

[0003] In view of the above technical problems, the purpose of the present application is to provide an electrically-driven double-air-channel vegetable precision seed sowing device. The negative pressure airflow is used to adsorb the vegetable seeds on the seed sowing hole 305-1 of the seed sowing disc, so as to realize directional sorting of the seeds and effectively improve the filling rate. The airflow assisted filling uses the positive pressure airflow to remove the excess vegetable seeds in and around the seed sowing hole 305-1, so as to realize precise filling. Compared with the brush seed cleaning, the air knife seed cleaning can reduce the damage to the seeds. The design of the inverted horn seed sowing hole 305-1 enables the airflow to uniformly diffuse when passing through the seed sowing hole, avoiding the damage to the seeds or inaccurate seed sowing caused by the local airflow being too strong. The vegetable seeds are adsorbed by the negative pressure airflow and move synchronously with the seed sowing disc, so as to ensure that the seeds do not separate from the seed sowing hole 305-1. The air blowing seed sowing device uses the positive pressure airflow to remove the seeds that are not fully sown.

[0004] In order to achieve the above purpose, the present application provides the following technical scheme:

[0005] An electrically-driven double-air-channel vegetable precision seed sowing device, the precision seed sowing device comprises a rack 1, a transmission device 2, an air suction filling device 3, an air blowing seed sowing mechanism 4, an air source mechanism and a control mechanism.

[0006] The rack 1 comprises a bottom plate 101, a left support 102, a right support 103, a short hollow shaft positioning sleeve 104 and a long hollow shaft positioning sleeve 105.

[0007] The bottom parts of the left support 102 and the right support 103 are fixedly connected with the upper surface of the bottom plate 101, the short hollow shaft positioning sleeve 104 is fixedly connected with the right side surface of the right support 103, and the long hollow shaft positioning sleeve 105 is fixedly connected with the left side surface of the left support 102.

[0008] The transmission device 2 comprises a motor 201, a driving gear 202, a synchronous belt 203 and a driven gear 204.

[0009] The motor 201 is fixed at the bottom of the left side of the left support 102; the driving gear 202 is fixed on the output shaft of the motor 201, and the driving gear 202 is located at the bottom of the right side of the left support 102; the driven gear 204 is fixed on the shaft of the left seed disc end cover 306, and the driven gear 204 is located in the middle of the right side of the left support 102; the synchronous belt 203 is sleeved on the driving gear 202 and the driven gear 204;

[0010] The air suction seed filling device 3 comprises a seed box 301, a left seed box connecting plate 302, a right seed box connecting plate 303, a short hollow shaft 304, a seed suction disc 305, a left seed disc end cover 306, a right seed disc end cover 307, a left shaft head gland 308, a right shaft head gland 309 and an airflow auxiliary seed filling device 310;

[0011] The main body of the seed suction disc 305 is a thin-walled circular ring, and a single row or multiple rows of seed arranging holes 305-1 are arranged on the main body of the seed suction disc 305;

[0012] The left seed box connecting plate 302 and the right seed box connecting plate 303 are respectively fixed to the top of the left support 102 and the right support 103; the two sides of the seed box 301 are fixed to the left seed box connecting plate 302 and the right seed box connecting plate 303; the seed box 301 is located above the seed suction disc 305, and the curved surface of the seed arranging port of the seed box 301 is tangent to the seed suction disc 305;

[0013] The two end surfaces of the seed suction disc 305 are fixed to the left seed disc end cover 306 and the right seed disc end cover 307; the shaft section of the right seed disc end cover 307 extends out of the through hole on the right support 103, and the shaft section of the left seed disc end cover 306 extends out of the through hole on the left support 102; the left shaft head gland 308 is fixed to the threaded hole on the left seed disc end cover 306, and the right shaft head gland 309 is fixed to the threaded hole on the right seed disc end cover 307;

[0014] The short hollow shaft 304 is coaxially installed in the short hollow shaft positioning sleeve 104 and penetrates into the cavity of the seed suction disc 305 through the right seed disc end cover 307;

[0015] The airflow passes through the short hollow shaft 304 to form a negative pressure in the cavity of the seed suction disc 305, and the vegetable seeds are sucked into the seed arranging holes 305-1 of the seed suction disc 305 under the action of the negative pressure airflow and move with the seed suction disc 305;

[0016] The airflow auxiliary seed filling device 310 comprises a jet nozzle 310-1, a left angle adjusting seat 310-2, a right angle adjusting seat 310-3, a left hinge seat 310-4 and a right hinge seat 310-5;

[0017] The two sides of the air jet nozzle 310-1 are respectively fixed with a left angle adjusting seat 310-2 and a right angle adjusting seat 310-3; the air jet nozzle 310-1 is installed obliquely above the seed suction disc 305, and the air outlet direction of the air jet nozzle 310-1 is aligned with the seed suction disc 305; the air flow passing through the air outlet of the air jet nozzle 310-1 moves from the oblique upper direction to the oblique lower direction of the seed box 301, so as to remove the excess vegetable seeds on the seed suction disc 305 and complete the seed cleaning work; the left angle adjusting seat 310-2 is fixed with a left hinge seat 310-4, and the right angle adjusting seat 310-3 is fixed with a right hinge seat 310-5; the left hinge seat 310-4 is fixed with a threaded hole in the upper part of the left support 102, and the right hinge seat 310-5 is fixed with a threaded hole in the upper part of the right support 103;

[0018] The air blowing and seeding mechanism 4 comprises a long hollow shaft 401, a right-angle adapter 402, a seed cleaning needle 403 and a seeding hopper 404;

[0019] The long hollow shaft 401 is coaxially installed in the long hollow shaft positioning sleeve 105, penetrates the left seed disc end cover 306 into the cavity of the seed suction disc 305, and is fixed with the horizontal segment of the right-angle adapter 402; the seed cleaning needle 403 is vertically arranged, the upper half of the seed cleaning needle 403 is a thick hollow tube which is fixed with the lower end of the vertical segment of the right-angle adapter 402, and the lower half is two or more thin hollow tubes which are respectively aligned with the seed discharge holes 305-1 of the seed suction disc 305;

[0020] The seeding hopper 404 is located directly below the seed suction disc 305 and is fixed with the bottom plate 101; the air flow enters through the long hollow shaft 401, passes through the right-angle adapter 402, is divided into the thin hollow tubes through the thick hollow tube of the seed cleaning needle 403, and blows the vegetable seeds in the seed discharge holes 305-1 of the seed suction disc 305 into the seeding hopper 404;

[0021] The air source mechanism comprises a first fan, a second fan, a third fan, a high-pressure hose and an air quick connector 501;

[0022] The air quick connector 501 is arranged on the short hollow shaft 304, the long hollow shaft 401 and the air jet nozzle 310-1;

[0023] The air inlet of the first fan is connected with the high-pressure hose and connected with the air inlet of the short hollow shaft 304 through the air quick connector 501; the air outlet of the second fan is connected with the high-pressure hose and connected with the air inlet of the long hollow shaft 401 through the air quick connector 501; the air outlet of the third fan is connected with the high-pressure hose and connected with the air inlet of the air jet nozzle 310-1 through the air quick connector 501; the air inlets of the first fan, the second fan and the third fan are negative pressure air flow, and the air outlets are positive pressure air flow;

[0024] The control mechanism comprises a controller, a power supply and a driver;

[0025] The power supply is electrically connected with the motor 201 to provide power for the motor 201; the controller is electrically connected with the motor 201 through the driver to control the rotating speed of the motor 201, thereby controlling the rotating speed of the seed suction disc 305.

[0026] The seed discharge hole 305-1 is inverted trumpet-shaped, that is, the hole diameter of the seed discharge hole 305-1 located on the inner surface of the seed suction disc 305 is larger than the hole diameter of the seed discharge hole 305-1 located on the outer surface of the seed suction disc 305.

[0027] Compared with the prior art, the beneficial effects of the present application are that:

[0028] The air suction seed filling device of the present application uses negative pressure airflow to adsorb vegetable seeds on the seed discharge hole 305-1 of the seed suction disc, realizes directional ordering of the seeds, and effectively improves the seed filling rate; the airflow assisted seed filling uses positive pressure airflow to remove excess seeds in and around the seed discharge hole 305-1, realizes precise seed filling; at the same time, compared with brush seed cleaning, air knife seed cleaning can better reduce the damage to the seeds; the design of the inverted trumpet-shaped seed discharge hole 305-1 makes the airflow uniformly diffuse when passing through the seed discharge hole, avoiding seed damage or inaccurate seed discharge caused by excessive local airflow; the vegetable seeds are adsorbed by the negative pressure airflow and move synchronously with the seed suction disc, ensuring that the seeds do not fall off the seed discharge hole 305-1; the air blowing seed dropping device uses positive pressure airflow to fully blow the seeds adsorbed on the seed discharge hole 305-1 into the seed dropping hopper 404, realizing accurate seeding. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1a 、 Figure 1b is a three-dimensional structure schematic diagram of the electrically-driven double-airway vegetable precise seed discharge device of the present application;

[0030] Figure 2 is a front view structure schematic diagram of the electrically-driven double-airway vegetable precise seed discharge device of the present application, in which the seed suction disc 305 is hidden;

[0031] Figure 3a 、 Figure 3b is a structure schematic diagram of the seed suction disc 305 of the present application;

[0032] Figure 4 is a structure schematic diagram of the seed dropping and cleaning assembly of the present application;

[0033] Figure 5 is a structure schematic diagram of the air jet nozzle 310-1 of the present application;

[0034] Figure 6 is a structure schematic diagram of the seed tank 301 of the present application;

[0035] Figure 7 is a connection schematic diagram of the air source mechanism of the present application;

[0036] Figure 8 is a structural schematic diagram of the air source mechanism of the present application;

[0037] Figure 9 is a connection schematic diagram of the control mechanism of the present application.

[0038] The reference signs in the drawings are as follows:

[0039] 1 frame

[0040] 101 bottom plate 102 left support

[0041] 103 right support 104 short hollow shaft positioning sleeve

[0042] 105 long hollow shaft positioning sleeve

[0043] 2 transmission device

[0044] 201 motor 202 driving gear

[0045] 203 synchronous belt 204 driven gear

[0046] 3 air suction seed filling device

[0047] 301 seed tank 302 left seed tank connecting plate

[0048] 303 right seed tank connecting plate 304 short hollow shaft

[0049] 305 seed suction disc 305-1 seed sowing hole

[0050] 306 left seed disc end cover 307 right seed disc end cover

[0051] 308 left shaft head gland 309 right shaft head gland

[0052] 310 air flow auxiliary seed filling device 310-1 air jet nozzle

[0053] 310-2 left angle adjusting seat 310-3 right angle adjusting seat

[0054] 310-4 left hinge seat 310-5 right hinge seat

[0055] 4 air blowing seed throwing mechanism

[0056] 401 long hollow shaft 402 right angle adapter

[0057] 403 seed cleaning needle 404 inoculation hopper

[0058] 501 pneumatic quick connector DETAILED DESCRIPTION

[0059] The present application is further illustrated below in combination with the drawings and examples.

[0060] As Figure 1a and Figure 1b shown, an electrically-driven double-airway vegetable precision seed sowing device includes a frame 1, a transmission device 2, an air suction seed filling device 3, an air blowing seed sowing mechanism 4, an air source mechanism and a control mechanism.

[0061] The frame 1 includes a bottom plate 101, a left support 102, a right support 103, a short hollow shaft positioning sleeve 104 and a long hollow shaft positioning sleeve 105.

[0062] The bottom parts of the left support 102 and the right support 103 are fixedly connected with the upper surface of the bottom plate 101, the short hollow shaft positioning sleeve 104 is fixedly connected with the right side surface of the right support 103, and the long hollow shaft positioning sleeve 105 is fixedly connected with the left side surface of the left support 102.

[0063] The transmission device 2 includes a step motor 201, a driving gear 202, a synchronous belt 203 and a driven gear 204.

[0064] The step motor 201 is fixedly connected with the bottom part of the left side surface of the left support 102, the driving gear 202 is fixedly connected with the output shaft of the step motor 201, the driving gear 202 is located at the bottom part of the right side surface of the left support 102, the driven gear 204 is fixedly connected with the shaft of the left seed disc end cover 306, the driven gear 204 is located at the middle part of the right side surface of the left support 102, and the synchronous belt 203 is sleeved on the driving gear 202 and the driven gear 204.

[0065] As Figure 1b and Figure 2 shown, the air suction seed filling device 3 includes a seed box 301, a left seed box connecting plate 302, a right seed box connecting plate 303, a short hollow shaft 304, a suction seed disc 305, a left seed disc end cover 306, a right seed disc end cover 307, a left shaft head gland 308, a right shaft head gland 309 and an air flow auxiliary seed filling device 310.

[0066] As Figure 3a and 3b shown, the suction seed disc 305 is in the shape of a thin-walled circular ring, a single row or multiple rows of seed sowing holes 305-1 are arranged on the main body of the suction seed disc 305, the seed sowing holes 305-1 are in the shape of an inverted trumpet, that is, the hole diameter of the seed sowing holes 305-1 located on the inner surface of the suction seed disc 305 is larger than the hole diameter of the seed sowing holes 305-1 located on the outer surface of the suction seed disc 305, this shape can increase the ventilation volume while avoiding the vegetables seeds from being sucked into the holes, thereby reducing the plugging phenomenon in the seed sowing process and improving the smoothness and reliability of the seed sowing.

[0067] The left seed tank connecting plate 302 and the right seed tank connecting plate 303 are respectively fixed to the top of the left support 102 and the right support 103. The two sides of the seed tank 301 are respectively fixed to the left seed tank connecting plate 302 and the right seed tank connecting plate 303. The seed tank 301 is located above the seed suction plate 305, and the curved surface of the seed discharge port of the seed tank 301 is tangent to the seed suction plate 305.

[0068] The two end faces of the seed suction plate 305 are fixed to the left seed plate end cover 306 and the right seed plate end cover 307. The shaft section of the right seed plate end cover 307 extends out of the through hole on the right support 103, and the shaft section of the left seed plate end cover 306 extends out of the through hole on the left support 102. The left shaft head gland 308 is fixed to the threaded hole on the left seed plate end cover 306, and the right shaft head gland 309 is fixed to the threaded hole on the right seed plate end cover 307.

[0069] The short hollow shaft 304 is coaxially installed in the short hollow shaft positioning sleeve 104 and passes through the right seed plate end cover 307 into the cavity of the seed suction plate 305.

[0070] The airflow through the short hollow shaft 304 forms a negative pressure in the cavity of the seed suction plate 305, and the vegetable seeds are sucked into the seed discharge hole 305-1 of the seed suction plate 305 under the action of the negative pressure airflow and move with the seed suction plate 305.

[0071] As shown in Figure 1b and Figure 5 The airflow auxiliary seed filling device 310 includes a jet nozzle 310-1, a left angle adjusting seat 310-2, a right angle adjusting seat 310-3, a left hinge seat 310-4, and a right hinge seat 310-5.

[0072] The two sides of the jet nozzle 310-1 are respectively fixed to the left angle adjusting seat 310-2 and the right angle adjusting seat 310-3. The jet nozzle 310-1 is installed obliquely above the seed suction plate 305, and the gas outlet direction of the jet nozzle 310-1 is aligned with the seed suction plate 305. The airflow through the gas outlet of the jet nozzle 310-1 moves from the oblique upper direction to the oblique lower direction of the seed tank 301, removes the excess vegetable seeds on the seed suction plate 305, and completes the seed cleaning work. The left angle adjusting seat 310-2 is fixed to the left hinge seat 310-4, and the right angle adjusting seat 310-3 is fixed to the right hinge seat 310-5. The left hinge seat 310-4 is fixed to the threaded hole above the left support 102, and the right hinge seat 310-5 is fixed to the threaded hole above the right support 103.

[0073] As shown in Figure 6As shown, the seed tank 301 is arc-shaped near the suction seed disc 305 side, which can be attached to the surface of the suction seed disc 305 to prevent the leakage of vegetable seeds. The bottom of the seed tank 301 extends to the lower side of the suction seed disc 305, so that when the suction seed disc 305 rotates, the excess vegetable seeds will fall back to the seed tank 301 due to gravity, achieving precise seeding.

[0074] As shown in Figure 1b , Figure 2 and Figure 4 , the air blowing seed throwing mechanism 4 includes a long hollow shaft 401, a right angle adapter 402, a seed cleaning needle 403 and a seed inoculation hopper 404.

[0075] The long hollow shaft 401 is coaxially installed in the long hollow shaft positioning sleeve 105, passes through the left seed disc end cover 306 into the cavity of the suction seed disc 305, and is fixedly connected with the horizontal section of the right angle adapter 402. The seed cleaning needle 403 is vertically arranged, the upper half of the seed cleaning needle 403 is a thick hollow tube which is fixedly connected with the lower end of the vertical section of the right angle adapter 402, and the lower half is two or more thin hollow tubes, and the bottoms of the hollow tubes are respectively aligned with the seed discharge holes 305-1 of the suction seed disc 305.

[0076] The seed inoculation hopper 404 is located directly below the suction seed disc 305 and is fixedly connected with the bottom plate 101. The air flow enters through the long hollow shaft 401, passes through the right angle adapter 402, and is divided into the thin hollow tubes through the thick hollow tube of the seed cleaning needle 403, and the vegetable seeds in the seed discharge holes 305-1 of the suction seed disc 305 are blown into the seed inoculation hopper 404.

[0077] As shown in Figure 7 and Figure 8 , the air source mechanism includes a first fan, a second fan, a third fan, a high-pressure hose and an air quick connector 501.

[0078] The air quick connector 501 is arranged on the short hollow shaft 304, the long hollow shaft 401 and the air jet nozzle 310-1.

[0079] The air inlet of the first fan is connected with the high-pressure hose and connected with the air inlet of the short hollow shaft 304 through the air quick connector 501; the air outlet of the second fan is connected with the high-pressure hose and connected with the air inlet of the long hollow shaft 401 through the air quick connector 501; the air outlet of the third fan is connected with the high-pressure hose and connected with the air inlet of the air jet nozzle 310-1 through the air quick connector 501. The air inlets of the first fan, the second fan and the third fan are negative pressure air flow, and the air outlets are positive pressure air flow.

[0080] As shown in Figure 9 , the control mechanism includes a controller, a power supply and a driver.

[0081] The power supply is electrically connected with the motor 201 to provide power for the motor 201. The controller is electrically connected with the motor 201 through the driver to control the rotating speed of the motor 201, thereby controlling the rotating speed of the seed suction disc 305.

[0082] In operation, the rotating speed of the motor 201 and the frequency of the fan are adjusted, the power supply and the signal line of the controller are connected, the air inlet and outlet switches of the fan are opened, and then the device can work normally. Subsequently, the device can realize the functions of air suction for seed filling, air blowing for seed cleaning, air suction for seed carrying and air blowing for seed dropping in sequence.

[0083] The working process of the present application is as follows:

[0084] The control mechanism controls the motor 201 to work and drive the seed suction disc 305 to rotate. Meanwhile, the first fan provides negative pressure in the cavity of the seed suction disc 305, so that the vegetable seeds in the seed box 301 enter the seed discharge holes 305-1 on the seed suction disc 305. The third fan provides positive pressure air flow for the air flow auxiliary seed filling device 310, and the air jet nozzle 310-1 blows the excess vegetable seeds at the edge of the seed discharge holes 305-1 back to the seed box 301. When the vegetable seeds move to the top of the seed receiving hopper 404, the second fan provides positive pressure air flow for the seed cleaning needle 403 to blow the vegetable seeds into the seed receiving hopper 404.

[0085] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electrically driven double airway vegetable precision seed-metering device, characterized in that: The precision seed arranging device comprises a frame (1), a transmission device (2), a suction seed filling device (3), a seed blowing and throwing mechanism (4), an air source mechanism and a control mechanism; The frame (1) comprises a bottom plate (101), a left support (102), a right support (103), a short hollow shaft positioning sleeve (104) and a long hollow shaft positioning sleeve (105); The bottom parts of the left support (102) and the right support (103) are fixedly connected with the upper surface of the bottom plate (101), the short hollow shaft positioning sleeve (104) is fixedly connected with the right side surface of the right support (103), and the long hollow shaft positioning sleeve (105) is fixedly connected with the left side surface of the left support (102); The transmission device (2) comprises a motor (201), a driving gear (202), a synchronous belt (203) and a driven gear (204); The motor (201) is fixedly connected with the bottom part of the left side surface of the left support (102), the driving gear (202) is fixedly connected with the output shaft of the motor (201) and located at the bottom part of the right side surface of the left support (102), the driven gear (204) is fixedly connected with the shaft of the left seed disc end cover (306) and located at the middle part of the right side surface of the left support (102), and the synchronous belt (203) is sleeved on the driving gear (202) and the driven gear (204); The suction seed filling device (3) comprises a seed box (301), a left seed box connecting plate (302), a right seed box connecting plate (303), a short hollow shaft (304), a suction seed disc (305), a left seed disc end cover (306), a right seed disc end cover (307), a left shaft head gland (308), a right shaft head gland (309) and an airflow auxiliary seed filling device (310); The main body of the suction seed disc (305) is thin-walled and annular, and a single row or multiple rows of seed arranging holes (305-1) are arranged on the main body of the suction seed disc (305); The left seed box connecting plate (302) and the right seed box connecting plate (303) are respectively fixed to the top parts of the left support (102) and the right support (103), the seed box (301) is fixedly connected with the left seed box connecting plate (302) and the right seed box connecting plate (303) on both sides, the seed box (301) is located above the suction seed disc (305), and the curved surface of the seed arranging opening of the seed box (301) is tangent to the suction seed disc (305); The two end surfaces of the suction seed disc (305) are fixedly connected with the left seed disc end cover (306) and the right seed disc end cover (307), the shaft segment of the right seed disc end cover (307) extends out of the through hole on the right support (103), the shaft segment of the left seed disc end cover (306) extends out of the through hole on the left support (102), the left shaft head gland (308) is fixedly connected with the threaded hole on the left seed disc end cover (306), and the right shaft head gland (309) is fixedly connected with the threaded hole on the right seed disc end cover (307); The short hollow shaft (304) is coaxially arranged in the short hollow shaft positioning sleeve (104) and penetrates the right seed disc end cover (307) to enter the cavity of the suction seed disc (305). Air flow through the short hollow shaft (304) makes the negative pressure in the seed tray (305) chamber, and the vegetable seeds are sucked into the seed discharge hole (305-1) of the seed tray (305) under the action of the negative pressure air flow, and follow the seed tray (305) movement; The air flow assisted seed filling device (310) comprises a jet nozzle (310-1), a left angle adjusting seat (310-2), a right angle adjusting seat (310-3), a left hinge seat (310-4) and a right hinge seat (310-5); The jet nozzle (310-1) is installed obliquely above the seed tray (305), and the air outlet direction of the jet nozzle (310-1) is aligned with the seed tray (305); the air flow through the air outlet of the jet nozzle (310-1) moves from the oblique upper direction to the oblique lower direction of the seed box (301), removes the excess vegetable seeds on the seed tray (305), and completes the seed cleaning work; the left angle adjusting seat (310-2) is fixedly connected with the left hinge seat (310-4), and the right angle adjusting seat (310-3) is fixedly connected with the right hinge seat (310-5); the left hinge seat (310-4) is fixedly connected with the threaded hole in the upper portion of the left support (102), and the right hinge seat (310-5) is fixedly connected with the threaded hole in the upper portion of the right support (103); The air blowing seed throwing mechanism (4) comprises a long hollow shaft (401), a right angle adapter (402), a seed cleaning needle (403) and a seed inoculation hopper (404); The long hollow shaft (401) is coaxially arranged in the long hollow shaft positioning sleeve (105), penetrates the left seed tray end cover (306) into the seed tray (305) chamber, and is fixedly connected with the horizontal section of the right angle adapter (402); the seed cleaning needle (403) is vertically arranged, the upper half of the seed cleaning needle (403) is a thick hollow tube which is fixedly connected with the lower end of the vertical section of the right angle adapter (402), and the lower half is two or more thin hollow tubes which are respectively aligned with the seed discharge holes (305-1) of the seed tray (305); The seed inoculation hopper (404) is located directly below the seed tray (305) and is fixedly connected with the bottom plate (101); the air flow enters from the long hollow shaft (401), passes through the right angle adapter (402), is shunted into the thin hollow tubes through the thick hollow tube of the seed cleaning needle (403), and blows the vegetable seeds in the seed discharge holes (305-1) of the seed tray (305) into the seed inoculation hopper (404); The air source mechanism comprises a first fan, a second fan, a third fan, a high-pressure hose and a pneumatic quick connector (501); The pneumatic quick connector (501) is arranged on the short hollow shaft (304), the long hollow shaft (401) and the jet nozzle (310-1); The air inlet of the first fan is connected with a high-pressure hose and connected with the air inlet of the short hollow shaft (304) through a pneumatic quick connector (501); the air outlet of the second fan is connected with a high-pressure hose and connected with the air inlet of the long hollow shaft (401) through a pneumatic quick connector (501); the air outlet of the third fan is connected with a high-pressure hose and connected with the air inlet of the air jet nozzle (310-1) through a pneumatic quick connector (501); the air inlets of the first fan, the second fan and the third fan are negative pressure air flow, and the air outlets are positive pressure air flow; The control mechanism comprises a controller, a power supply and a driver; The power supply is electrically connected with the motor (201) to provide power for the motor (201); the controller is electrically connected with the motor (201) through the driver to control the rotating speed of the motor (201) and thus control the rotating speed of the seed suction disc (305); The seed discharge hole (305-1) is inverted horn-shaped, that is, the diameter of the hole in the inner surface of the seed suction disc (305) is larger than the diameter of the hole in the outer surface of the seed suction disc (305).

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