Planting device for rape cultivation experiment

Abstract

The utility model relates to the related technical field of rape cultivation experiments, in particular to a planting device for a rape cultivation experiment. The device comprises a bottom plate, the top of the bottom plate is fixedly connected with a fixing box, the two sides of the top of the fixing box are each provided with two planting pots, the tops of the planting pots are provided with portal frames, the tops of the portal frames are provided with storage tanks, and the outer surfaces of the storage tanks are fixedly connected with fixing sleeves. Under the matching action of the bottom plate, the fixing box, the planting pot, the portal frame, the storage tank, the fixing sleeve, the supporting frame, the filling port and the negative pressure mechanism, the device can be controlled to quantitatively add nutrient solution to rape, the adding amount of the nutrient solution can be adjusted according to the growth cycle of the rape, growth and development of the rape are facilitated, and the rape planting efficiency is improved. According to an existing planting device for the rape cultivation experiment, the adding amount of a nutrient solution is controlled through a control valve, so that adding metering of the nutrient solution is not accurate, and growth and development of rape are affected.

Description

Technical Field

[0001] The utility model relates to the technical field of rapeseed cultivation experiments, and particularly relates to a planting device for rapeseed cultivation experiments. Background Technique

[0002] Rapeseed is a herbaceous crop of the cruciferous family and Brassica genus. The stem is erect and branched. Only the young leaves have a few scattered bristles. The petiole is 2.5 to 6 cm long, with lobes at the base. The middle and upper stem leaves gradually change from oblong-elliptic to lanceolate, with a cordate base and clasping the stem. The raceme is corymbose, and the pedicel is 6-12 mm long.

[0003] The utility model patent with the publication number of CN219322961U discloses a planting device for rapeseed cultivation experiments, belonging to the technical field of rapeseed cultivation experiments. It aims to solve the problem that in the prior art, during the rapeseed cultivation process, experiments on the influence of different addition sequences of nutrient solution on the growth of rapeseed seedlings are required. Currently, it is necessary for workers to manually add nutrient solution to the rapeseed seedlings, which is inconvenient to operate and increases the workload of the workers. It includes a workbench, on the upper surface of which electric telescopic rods are fixedly connected at the left and right positions. The extending ends of the two electric telescopic rods are jointly connected to a support plate. In the middle position on the upper surface of the support plate, a driving motor is fixedly connected. The output end of the driving motor is fixedly connected to a rotating shaft. One end of the rotating shaft is fixedly connected to a rotating disk. On the upper surface of the rotating disk, a liquid storage tank is fixedly connected. A liquid outlet pipe is provided on the lower surface of the liquid storage tank. One end of the liquid outlet pipe is connected to a liquid outlet head. A control valve is provided on the liquid outlet pipe. A planting pot is provided on the upper surface of the workbench. A fixing mechanism is provided on the upper surface of the workbench and outside the planting pot. A controller is provided on the upper surface of the workbench. This utility model has the characteristics of strong practicability and convenient addition of nutrient solution.

[0004] However, the above patent still has deficiencies: Although this patent can realize the addition operation of the nutrient solution, it controls the addition amount of the nutrient solution through a control valve, resulting in relatively inaccurate measurement of the added nutrient solution and affecting the growth and development of rapeseed. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a planting device for rapeseed cultivation experiments to solve the problem that in the existing planting device for rapeseed cultivation experiments, the addition amount of the nutrient solution is controlled by a control valve, resulting in relatively inaccurate measurement of the added nutrient solution and affecting the growth and development of rapeseed as mentioned in the above background technique.

[0006] The technical solution of the utility model is as follows:

[0007] A planting device for rapeseed cultivation experiments, comprising: a bottom plate; a fixed box is fixedly connected to the top of the bottom plate, two planting pots are arranged on both sides of the top of the fixed box, a gantry is arranged on the top of the planting pot, a storage tank is arranged on the top of the gantry, a fixed sleeve is fixedly connected to the outer surface of the storage tank, support frames are fixedly connected to both sides of the fixed sleeve, the bottom ends of the support frames are fixedly connected to the gantry, and a filling port is opened on the top of the storage tank; a negative pressure mechanism for quantitatively adding nutrient solution to rapeseed is arranged at the bottom of the storage tank; a fixing mechanism for positioning and clamping the two planting pots is arranged inside the fixed box.

[0008] Preferably, the negative pressure mechanism includes: a negative pressure pipe is fixedly connected to the bottom of the storage tank, a three-way pipe is fixedly connected to the bottom of the negative pressure pipe, spray heads are fixedly connected to both ends of the bottom of the three-way pipe, and a negative pressure cylinder is fixedly connected to one side of the negative pressure pipe; a piston adapted to the inside of the negative pressure cylinder is arranged, a sealing ring is fixedly connected to the outer surface of the piston, a first sliding rod is fixedly connected to one end of the piston, the end of the first sliding rod away from the piston penetrates through the negative pressure cylinder and the support frame and extends to the moving frame, the moving frame is fixedly connected to the first sliding rod, a second sliding rod is fixedly connected to the side of the moving frame away from the first sliding rod, a fixed block is slidably connected to the outer surface of the second sliding rod away from the moving frame, and the fixed block is fixedly connected to the gantry; a rotating mechanism for controlling the moving stroke of the piston is arranged inside the moving frame.

[0009] Preferably, the rotating mechanism includes: a cylindrical block adapted to the inside of the moving frame is arranged, a rotating plate is arranged on the top of the cylindrical block, a stroke groove is opened at the position where the rotating plate is close to the cylindrical block, a screw rod is arranged inside the stroke groove, the bottom end of the screw rod is fixedly connected to the cylindrical block, and a nut is threadedly connected to the outer surface of the top end of the screw rod; a rotating shaft is fixedly connected to the center of the top of the rotating plate, the top end of the rotating shaft penetrates through the motor frame and extends to the first motor, the motor frame is fixedly connected to the gantry, the first motor is fixedly connected to the motor frame, and the rotating shaft is fixedly connected to the output end of the first motor.

[0010] Preferably, two one-way blocks are fixedly connected to the inside of the negative pressure pipe, the one-way blocks cooperate with the piston, connecting rods are slidably connected to the inside of the one-way blocks, sealing plates are fixedly connected to the bottom ends of the connecting rods, limiting plates are fixedly connected to the top ends of the connecting rods, springs are arranged at the bottom of the limiting plates, the springs are respectively sleeved on the outer surfaces of the connecting rods, and a plurality of through holes are opened at the positions where the one-way blocks are close to the sealing plates.

[0011] Preferably, the fixing mechanism includes: a bidirectional screw is rotatably connected inside the fixing box, the outer surfaces of both ends of the bidirectional screw are threadedly connected with internal thread blocks, the tops of the internal thread blocks are fixedly connected with moving blocks, the moving blocks are all slidably connected with the fixing box, and the tops of the moving blocks are fixedly connected with positioning clamping plates; an arc-shaped fixing plate is arranged between the two planting pots, the arc-shaped fixing plate is fixedly connected with the fixing box, the two positioning clamping plates cooperate with the arc-shaped fixing plate, one end of the bidirectional screw is fixedly connected with the output end of a second motor, and the second motor is fixedly connected with the fixing box.

[0012] Preferably, sliding grooves are formed on both sides of the moving block, limiting sliding strips are fixedly connected to the fixing box near the sliding grooves, and the moving blocks are all slidably connected with the limiting sliding strips through the sliding grooves.

[0013] Preferably, support feet are fixedly connected to the four corners of the bottom of the bottom plate, and anti-slip pads are fixedly connected to the bottoms of the support feet.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] Firstly, through the combined action of the bottom plate, fixing box, planting pots, gantry, storage tank, fixing sleeve, support frame, filling port and negative pressure mechanism of the present utility model, not only can the device be controlled to quantitatively add nutrient solution to rape, but also the addition amount of nutrient solution can be adjusted according to the growth cycle of rape, which is beneficial to the growth and development of rape. In the existing planting device for rape cultivation experiments, the addition amount of nutrient solution is controlled by a control valve, resulting in inaccurate measurement of the added nutrient solution and affecting the growth and development of rape.

[0016] Secondly, through the combined action of the bottom plate, fixing box, planting pots, gantry, storage tank, fixing sleeve, support frame, filling port and fixing mechanism of the present utility model, the planting pots can be positioned and fixed, avoiding the situation of nutrient solution addition failure caused by the offset of the planting pots, and improving the practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of a planting device for rape cultivation experiments of the present utility model;

[0018] Figure 2 is a side-sectional structural schematic diagram of a planting device for rape cultivation experiments of the present utility model;

[0019] Figure 3 For the present utility model Figure 2 is an enlarged structural schematic diagram at A in;

[0020] Figure 4 For the present utility modelFigure 3 Schematic diagram of the enlarged structure at B in the middle;

[0021] Figure 5 Schematic diagram of the negative pressure mechanism structure of the present utility model;

[0022] Figure 6 Schematic diagram of the internal structure of the one-way block of the present utility model;

[0023] Figure 7 Schematic diagram of the fixing mechanism structure of the present utility model.

[0024] In the figure:

[0025] 1. Base plate; 2. Fixed box; 3. Planting pot; 4. Gantry; 5. Storage tank; 6. Fixed sleeve; 7. Support frame; 8. Filling port; 9. Negative pressure mechanism; 10. Fixing mechanism; 11. Negative pressure pipe; 12. Three-way pipe; 13. Sprayer; 14. Negative pressure cylinder; 15. Piston; 16. Sealing ring; 17. First sliding rod; 18. Moving frame; 19. Second sliding rod; 20. Fixed block; 21. Rotating mechanism; 22. Cylindrical block; 23. Rotating plate; 24. Stroke groove; 25. Screw; 26. Nut; 27. Rotating shaft; 28. Motor frame; 29. First motor; 30. One-way block; 31. Connecting rod; 32. Sealing plate; 33. Limiting plate; 34. Spring; 35. Through hole; 36. Bi-directional screw; 37. Internal thread block; 38. Moving block; 39. Positioning clamping plate; 40. Arc-shaped fixing plate; 41. Chute; 42. Limiting slide bar; 43. Support foot; 44. Anti-slip pad; 45. Second motor. Specific embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figures 1 to 7 , the present utility model details the above technical solutions through the following embodiments:

[0028] A planting device for rapeseed cultivation experiments, comprising: a bottom plate 1; a fixed box 2 is fixedly connected to the top of the bottom plate 1, two planting pots 3 are arranged on both sides of the top of the fixed box 2, a gantry 4 is arranged on the top of the planting pot 3, a storage tank 5 is arranged on the top of the gantry 4, a fixing sleeve 6 is fixedly connected to the outer surface of the storage tank 5, support frames 7 are fixedly connected to both sides of the fixing sleeve 6, the bottom ends of the support frames 7 are fixedly connected to the gantry 4, and a filling port 8 is opened at the top of the storage tank 5; a negative pressure mechanism 9 for quantitatively adding nutrient solution to rapeseed is arranged at the bottom of the storage tank 5; a fixing mechanism 10 for positioning and clamping the two planting pots 3 is arranged inside the fixed box 2. The user places the planting pot 3 on the fixed box 2, positions and fixes the planting pot 3 through the fixing mechanism 10, and then extracts a certain amount of nutrient solution from the inside of the storage tank 5 through the negative pressure mechanism 9 and transports it into the inside of the planting pot 3.

[0029] As Figure 2 , Figure 3 and Figure 5 shown, the negative pressure mechanism 9 includes: a negative pressure pipe 11 is fixedly connected to the bottom of the storage tank 5, a three-way pipe 12 is fixedly connected to the bottom of the negative pressure pipe 11, spray heads 13 are fixedly connected to both ends of the bottom of the three-way pipe 12, and a negative pressure cylinder 14 is fixedly connected to one side of the negative pressure pipe 11; a piston 15 adapted to the inside of the negative pressure cylinder 14 is arranged inside the negative pressure cylinder 14, a sealing ring 16 is fixedly connected to the outer surface of the piston 15, a first sliding rod 17 is fixedly connected to one end of the piston 15, the end of the first sliding rod 17 away from the piston 15 penetrates through the negative pressure cylinder 14 and the support frame 7 and extends to the moving frame 18, the moving frame 18 is fixedly connected to the first sliding rod 17, a second sliding rod 19 is fixedly connected to the side of the moving frame 18 away from the first sliding rod 17, a fixed block 20 is slidably connected to the outer surface of the second sliding rod 19 away from the moving frame 18, and the fixed block 20 is fixedly connected to the gantry 4; a rotating mechanism 21 for controlling the moving stroke of the piston 15 is arranged inside the moving frame 18. The moving frame 18 is controlled to move horizontally back and forth through the rotating mechanism 21. The moving frame 18 drives the first sliding rod 17 through the cooperation of the second sliding rod 19 and the fixed block 20. The first sliding rod 17 drives the piston 15 to slide backward inside the negative pressure cylinder 14, so that a negative pressure state is formed inside the negative pressure pipe 11, and then the nutrient solution inside the storage tank 5 is extracted into the negative pressure pipe 11. At the same time, the moving frame 18 is reset. When the moving frame 18 is reset, it drives the first sliding rod 17, and the first sliding rod 17 drives the piston 15. When the piston 15 slides toward the negative pressure pipe 11, the pressure inside the negative pressure pipe 11 increases, and then the nutrient solution is squeezed into the three-way pipe 12, and finally the nutrient solution is sprayed into the planting pot 3 by the spray heads 13.

[0030] As Figure 3 and Figure 5As shown in the figure, the rotation mechanism 21 includes: a cylindrical block 22 adapted to be disposed inside the moving frame 18. A rotating plate 23 is disposed on the top of the cylindrical block 22. A travel groove 24 is formed near the cylindrical block 22 on the rotating plate 23. A screw rod 25 is disposed inside the travel groove 24. The bottom end of the screw rod 25 is fixedly connected to the cylindrical block 22. A nut 26 is threadedly connected to the outer surface of the top end of the screw rod 25. A rotating shaft 27 is fixedly connected to the center of the top of the rotating plate 23. The top end of the rotating shaft 27 penetrates through the motor bracket 28 and extends to the first motor 29. The motor bracket 28 is fixedly connected to the gantry 4. The first motor 29 is fixedly connected to the motor bracket 28. The rotating shaft 27 is fixedly connected to the output end of the first motor 29. When the first motor 29 is started, the output end of the first motor 29 drives the rotating shaft 27 to rotate one week. The rotating shaft 27 drives the rotating plate 23. The rotating plate 23 drives the cylindrical block 22 to make a turnover through the cooperation of the travel groove 24, the screw rod 25 and the nut 26. While the cylindrical block 22 is making a turnover, it drives the moving frame 18. The moving frame 18 makes a reciprocating horizontal sliding through the cooperation of the second slide rod 19 and the fixed block 20. The user can also adjust the position of the screw rod 25 inside the travel groove 24 through the nut 26, so as to adjust the turnover diameter of the cylindrical block 22, and achieve the purpose of adjusting the reciprocating movement stroke of the moving frame 18. By adjusting the movement stroke of the moving frame 18, the movement stroke of the piston 15 is adjusted, and thus the purpose of adjusting the nutrient solution metering is achieved.

[0031] As Figure 6 shown, two one-way blocks 30 are fixedly connected inside the negative pressure tube 11. The one-way blocks 30 cooperate with the piston 15. Connecting rods 31 are slidably connected inside the one-way blocks 30 respectively. Sealing plates 32 are fixedly connected to the bottom ends of the connecting rods 31 respectively. Limiting plates 33 are fixedly connected to the top ends of the connecting rods 31. Springs 34 are disposed at the bottoms of the limiting plates 33 respectively. The springs 34 are sleeved on the outer surfaces of the connecting rods 31 respectively. A plurality of through holes 35 are formed near the sealing plates 32 on the one-way blocks 30 respectively. When a negative pressure state is generated inside the negative pressure tube 11, the sealing plate 32 inside the top one-way block 30 moves downward, so that the nutrient solution inside the storage tank 5 enters the inside of the negative pressure tube 11 through the through holes 35. When the pressure inside the negative pressure tube 11 increases, the top one-way block 30 is reset through the cooperation of the spring 34, so that the top end of the negative pressure tube 11 is sealed. At the same time, the nutrient solution inside the negative pressure tube 11 squeezes the sealing plate 32 through the through holes 35 inside the bottom one-way block 30, so that the bottom end of the negative pressure tube 11 is opened, and thus the nutrient solution inside the negative pressure tube 11 flows into the inside of the tee pipe 12.

[0032] As Figure 2 and Figure 7As shown in the figure, the fixing mechanism 10 includes: a bidirectional screw 36 is rotatably connected inside a fixing box 2. Threaded blocks 37 are threadedly connected to the outer surfaces of both ends of the bidirectional screw 36. Moving blocks 38 are fixedly connected to the tops of the threaded blocks 37. The moving blocks 38 are all slidably connected to the fixing box 2. Positioning clamping plates 39 are fixedly connected to the tops of the moving blocks 38. An arc-shaped fixing plate 40 is arranged between the two planting pots 3. The arc-shaped fixing plate 40 is fixedly connected to the fixing box 2. The two positioning clamping plates 39 cooperate with the arc-shaped fixing plate 40. One end of the bidirectional screw 36 is fixedly connected to the output end of a second motor 45. The second motor 45 is fixedly connected to the fixing box 2. When the second motor 45 is started, the output end of the second motor 45 drives the bidirectional screw 36. While the bidirectional screw 36 rotates, the two threaded blocks 37 approach each other. While the threaded blocks 37 move, they drive the moving blocks 38. The moving blocks 38 drive the positioning clamping plates 39. The positioning clamping plates 39 cooperate with the arc-shaped fixing plate 40 to position and clamp the two planting pots 3, which can position and fix the planting pots 3, avoiding the situation where the nutrient solution addition fails due to the offset of the planting pots 3, and improving the practicability.

[0033] As Figure 4 shown, sliding grooves 41 are formed on both sides of the moving block 38. Limit sliding strips 42 are fixedly connected to the fixing box 2 near the sliding grooves 41. The moving blocks 38 are all slidably connected to the limit sliding strips 42 through the sliding grooves 41, which can limit the moving blocks 38 and enable the moving blocks 38 to slide flexibly inside the fixing box 2.

[0034] As Figure 1 shown, support feet 43 are fixedly connected to the four corners of the bottom of the bottom plate 1. Anti-slip pads 44 are fixedly connected to the bottoms of the support feet 43, which improves the anti-slip performance of the device, avoids the displacement phenomenon of the device, and improves the practicability.

[0035] Working principle: The user places the planting pot 3 on the fixing box 2 and starts the second motor 45. The output end of the second motor 45 drives the bidirectional screw 36. While the bidirectional screw 36 rotates, the two threaded blocks 37 approach each other. While the threaded blocks 37 move, they drive the moving blocks 38. The moving blocks 38 slide horizontally inside the fixing box 2 through the cooperation of the sliding grooves 41 and the limit sliding strips 42. While the moving blocks 38 slide, they drive the positioning clamping plates 39. The positioning clamping plates 39 cooperate with the arc-shaped fixing plate 40 to position and clamp the two planting pots 3, which can position and fix the planting pots 3, avoiding the situation where the nutrient solution addition fails due to the offset of the planting pots 3, and improving the practicability.

[0036] Start the first motor 29. The output end of the first motor 29 drives the rotating shaft 27 to rotate one week. The rotating shaft 27 drives the rotating plate 23. The rotating plate 23 drives the cylindrical block 22 to make a turnover through the cooperation of the stroke groove 24, the screw 25 and the nut 26. While the cylindrical block 22 is making a turnover, it drives the moving frame 18. The moving frame 18 makes a reciprocating horizontal sliding through the cooperation of the second sliding rod 19 and the fixed block 20. The user can also adjust the position of the screw 25 inside the stroke groove 24 through the nut 26, so as to adjust the turnover diameter of the cylindrical block 22 and achieve the purpose of adjusting the reciprocating movement stroke of the moving frame 18. By adjusting the movement stroke of the moving frame 18, the movement stroke of the piston 15 is adjusted, so as to achieve the purpose of adjusting the metering of the nutrient solution. While the moving frame 18 is making a reciprocating horizontal movement, the moving frame 18 drives the first sliding rod 17 through the cooperation of the second sliding rod 19 and the fixed block 20. The first sliding rod 17 drives the piston 15 to slide backward inside the negative pressure cylinder 14, so that a negative pressure state is formed inside the negative pressure pipe 11. When a negative pressure state is generated inside the negative pressure pipe 11, the sealing plate 32 inside the top one-way block 30 moves downward, so that the nutrient solution inside the storage tank 5 enters the negative pressure pipe 11 through the through hole 35, and then the nutrient solution inside the storage tank 5 is extracted into the negative pressure pipe 11. At the same time, the moving frame 18 is reset. While the moving frame 18 is being reset, it drives the first sliding rod 17. The first sliding rod 17 drives the piston 15. While the piston 15 slides toward the negative pressure pipe 11, the pressure inside the negative pressure pipe 11 increases. When the pressure inside the negative pressure pipe 11 increases, the top one-way block 30 is reset through the cooperation of the spring 34, so that the top of the negative pressure pipe 11 is sealed. At the same time, the nutrient solution inside the negative pressure pipe 11 squeezes the sealing plate 32 through the through hole 35 inside the bottom one-way block 30, so that the bottom of the negative pressure pipe 11 is opened, and then the nutrient solution inside the negative pressure pipe 11 flows into the inside of the three-way pipe 12, and finally the nutrient solution is sprayed into the planting pot 3 by the nozzle 13. It can not only control the device to add nutrient solution to rape quantitatively, but also adjust the addition amount of nutrient solution according to the growth cycle of rape, which is beneficial to the growth and development of rape. The existing planting device for rape cultivation experiments controls the addition amount of nutrient solution through a control valve, resulting in inaccurate metering of the added nutrient solution and affecting the growth and development of rape.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A planting device for rapeseed cultivation experiments, comprising: Bottom plate (1); The invention is characterized in that a fixed box (2) is fixedly connected to the top of the base plate (1), two planting pots (3) are arranged on both sides of the top of the fixed box (2), a gantry (4) is arranged on the top of the planting pots (3), a storage tank (5) is arranged on the top of the gantry (4), a fixed sleeve (6) is fixedly connected to the outer surface of the storage tank (5), both sides of the fixed sleeve (6) are fixedly connected to a support frame (7), the bottom ends of the support frames (7) are fixedly connected to the gantry (4), and a filling port (8) is opened on the top of the storage tank (5); The bottom of the storage tank (5) is provided with a negative pressure mechanism (9) for quantitatively adding nutrient solution to the rapeseed; A fixing mechanism (10) for positioning and clamping the two planting pots (3) is arranged inside the fixing box (2).

2. A planting device for rapeseed cultivation experiments as claimed in claim 1, characterized in that: The negative pressure mechanism (9) comprises: The bottom of the storage tank (5) is fixedly connected to a negative pressure pipe (11), the bottom of the negative pressure pipe (11) is fixedly connected to a three-way pipe (12), both ends of the bottom of the three-way pipe (12) are fixedly connected to a nozzle (13), and one side of the negative pressure pipe (11) is fixedly connected to a negative pressure cylinder (14); The negative pressure cylinder (14) is provided with a matching piston (15) inside, and the outer surface of the piston (15) is fixedly connected with a sealing ring (16), one end of the piston (15) is fixedly connected with a first sliding rod (17), and the end of the first sliding rod (17) away from the piston (15) passes through the negative pressure cylinder (14) and the support frame (7) and extends to the moving frame (18), and the moving frame (18) is fixedly connected to the first sliding rod (17), and the side of the moving frame (18) away from the first sliding rod (17) is fixedly connected with a second sliding rod (19), and the outer surface of the second sliding rod (19) away from the moving frame (18) is slidably connected with a fixed block (20), and the fixed block (20) is fixedly connected to the gantry (4); A rotating mechanism (21) for controlling the movement stroke of the piston (15) is arranged inside the moving frame (18).

3. A planting device for rapeseed cultivation experiments as claimed in claim 2, characterized in that: The rotating mechanism (21) comprises: A matching cylindrical block (22) is arranged inside the moving frame (18), a rotating plate (23) is arranged on the top of the cylindrical block (22), a travel groove (24) is provided on the rotating plate (23) near the cylindrical block (22), a screw rod (25) is arranged inside the travel groove (24), the bottom end of the screw rod (25) is fixedly connected to the cylindrical block (22), and a nut (26) is threadedly connected to the outer surface of the top end of the screw rod (25); A rotating shaft (27) is fixedly connected at the top center of the rotating plate (23); the top end of the rotating shaft (27) passes through the motor frame (28) and extends to the first motor (29); the motor frame (28) is fixedly connected to the gantry (4); the first motor (29) is fixedly connected to the motor frame (28); and the rotating shaft (27) is fixedly connected to an output end of the first motor (29).

4. The planting device for rapeseed cultivation experiment as claimed in claim 2, characterized in that: The negative pressure tube (11) is fixedly connected to two one-way blocks (30) inside, the one-way blocks (30) cooperate with the piston (15), the one-way blocks (30) are slidably connected to the inside of the one-way blocks (30), the bottom ends of the connecting rods (31) are fixedly connected to sealing plates (32), the top ends of the connecting rods (31) are fixedly connected to limiting plates (33), the bottoms of the limiting plates (33) are provided with springs (34), the springs (34) are respectively sleeved on the outer surfaces of the connecting rods (31), and the one-way blocks (30) are provided with a plurality of through holes (35) near the sealing plates (32).

5. The planting device for rapeseed cultivation experiment according to claim 1, characterized in that: The fixing mechanism (10) comprises: The fixed box (2) is internally rotatably connected with a bidirectional screw (36), the outer surfaces of both ends of the bidirectional screw (36) are threadedly connected with internal thread blocks (37), the tops of the internal thread blocks (37) are fixedly connected with moving blocks (38), the moving blocks (38) are slidably connected with the fixed box (2), and the tops of the moving blocks (38) are fixedly connected with positioning clamps (39); An arc-shaped fixing plate (40) is arranged between the two planting pots (3), the arc-shaped fixing plate (40) is fixedly connected to the fixing box (2), the two positioning clamps (39) cooperate with the arc-shaped fixing plate (40), one end of the bidirectional screw (36) is fixedly connected to the output end of the second motor (45), and the second motor (45) is fixedly connected to the fixing box (2).

6. A planting device for rapeseed cultivation experiments as claimed in claim 5, characterized in that: Slide grooves (41) are provided on both sides of the moving block (38); the fixed box (2) is fixedly connected to a limit slide bar (42) near the slide groove (41); and the moving block (38) is slidably connected to the limit slide bar (42) via the slide groove (41).

7. The planting device for rapeseed cultivation experiment according to claim 1, characterized in that: The four corners of the bottom of the base plate (1) are fixedly connected to support feet (43), and the bottoms of the support feet (43) are fixedly connected to anti-slip pads (44).

Images