Rice seedling transfer device

Abstract

According to the rice seedling transfer device provided by the embodiment of the invention, the multiple placement units are driven to continuously move along the annular track path through the annular surrounding type taking and placing assembly, surrounding type automatic taking and placing of seedlings are achieved, and the efficiency is effectively improved. Wherein the placing unit can adaptively keep horizontal under the action of gravity, so that seedlings are always horizontal and prevented from toppling over; wherein the spraying assembly is arranged at the top of the frame assembly, the spraying area of the spraying assembly can cover the moving path of the placing unit, and during long-distance transportation, the survival rate of the placing unit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery technical field, concretely relates to a seedling transfer device for rice planting, especially can realize the transfer device that surrounds type takes and puts rice seedling and evenly sprays nutrient solution. BACKGROUND

[0002] When rice is transplanted and planted, generally first cultivating rice seedling in the cultivation field, when rice seedling grows to the specified height, then the rice seedling in the cultivation field is transferred to the planting field.

[0003] The traditional transfer mode of rice seedling is mostly stacked and loaded transfer, but artificial stacking easily leads to seedling damage, and it is difficult to load and unload quickly, and the existing transfer device lacks liquid medicine spraying function, which affects the survival rate during long-distance transportation. Therefore, a transfer device capable of efficiently taking and placing seedlings and spraying nutrient solution is urgently needed. SUMMARY

[0004] The application provides a rice seedling transfer device, which is driven by a ring-around type taking and placing assembly to continuously move a plurality of placing units along a ring-shaped track path, realizes automatic ring-around taking and placing of seedlings, and effectively improves efficiency. The placing unit can be self-adapted to be horizontally maintained under the action of gravity, ensuring that the seedlings are always horizontal and avoiding tilting; the spraying assembly is arranged on the top of the frame assembly, and the spraying area of the spraying assembly can cover the movement path of the placing unit, thereby improving the survival rate during long-distance transportation.

[0005] The application provides a rice seedling transfer device, which is driven by a ring-around type taking and placing assembly to continuously move a plurality of placing units along a ring-shaped track path, realizes automatic ring-around taking and placing of seedlings, and effectively improves efficiency. The placing unit can be self-adapted to be horizontally maintained under the action of gravity, ensuring that the seedlings are always horizontal and avoiding tilting; the spraying assembly is arranged on the top of the frame assembly, and the spraying area of the spraying assembly can cover the movement path of the placing unit, thereby improving the survival rate during long-distance transportation.

[0006] The transfer vehicle is internally provided with a frame assembly;

[0007] A ring-around type taking and placing assembly is installed on the frame assembly and comprises:

[0008] A driving assembly is arranged on both sides of the frame assembly;

[0009] A track assembly is symmetrically arranged on both sides of the inside of the frame assembly; the track assembly comprises a ring-shaped track path and a transmission chain body slidably arranged on the track path; the driving assembly can drive the transmission chain body to slide along the track path;

[0010] At least one placing unit is arranged between the two track assemblies; the two sides of the at least one placing unit are movably connected with the transmission chain body, and under the action of the driving assembly, the placing unit makes ring-around movement around the track path, and the placing unit maintains a horizontal state through gravity during movement;

[0011] A spraying assembly is arranged on the top of the frame assembly, and a spraying area of the spraying assembly can cover the moving path of the placing unit.

[0012] Further, as a more preferred embodiment of the present application, the driving assembly comprises:

[0013] A servo motor, and an output end of the servo motor is connected with a driving shaft;

[0014] A dial plate, an axis of the dial plate is installed on the driving shaft, and ring teeth are uniformly arranged on the outer periphery of the dial plate; the outer periphery of the dial plate is engaged with at least a part of the transmission chain body;

[0015] Further, as a more preferred embodiment of the present application, the transmission chain body comprises:

[0016] A plurality of connecting columns which are slidably connected to the track path, adjacent connecting columns are movably connected through connecting rods, and the distance between adjacent connecting columns matches the rotating track of the dial plate.

[0017] Further, as a more preferred embodiment of the present application, the track assembly comprises:

[0018] An inner track frame which is fixedly arranged on the frame assembly;

[0019] An outer track frame which is fixedly arranged on the frame assembly, the inner track frame and the outer track frame form the track path, the connecting columns are provided with ring grooves which are matched with the track path, the ring grooves can be clamped into the track path and slide along the track path.

[0020] Further, as a more preferred embodiment of the present application, the track assembly further comprises:

[0021] A plurality of connecting plates, two ends of each of the plurality of connecting plates are movably connected with adjacent connecting columns;

[0022] A movable shaft, a middle part of the connecting plate is provided with a movable shaft, and the movable shaft is hingedly connected with the at least one placing unit.

[0023] Further, as a more preferred embodiment of the present application, the at least one placing unit comprises:

[0024] A supporting plate, a receiving groove for placing rice seedlings is arranged on the top of the supporting plate;

[0025] Connecting frames, the two ends of the supporting plate are respectively provided with the connecting frames; the middle part of the top of the connecting frame is hingedly connected with the movable shaft, and the bottom of the connecting frame is connected with the supporting plate;

[0026] The placing unit rotates relative to the movable shaft through the connecting frame in the surrounding movement, so that the placing unit can be adaptively rotated to maintain a horizontal state.

[0027] Further, as a more preferred embodiment of the utility model, the spraying assembly comprises:

[0028] The liquid storage unit is used for storing the nutrient solution.

[0029] The spraying unit is communicated with the liquid storage unit through a flexible hose.

[0030] The spraying unit is arranged on the swing assembly.

[0031] The power component is installed on the frame assembly, and is in transmission connection with the swing assembly, and is used for driving the swing assembly to reciprocate and drive the spraying unit to swing and spray the rice seedlings in the at least one placing unit.

[0032] Further, as a more preferred embodiment of the utility model, the power component comprises a driving motor, and a gear is installed at an output end of the driving motor.

[0033] The swing assembly comprises:

[0034] The at least one guide rail is connected with the frame assembly.

[0035] The at least one sliding block is in sliding connection with the at least one guide rail, one side of the at least one sliding block is in meshing connection with the gear through a rack, and a bottom end of the sliding block is connected with the spraying unit; and the driving motor drives the gear to reverse to drive the spraying unit to reciprocate.

[0036] Further, as a more preferred embodiment of the utility model, the spraying unit comprises a spraying frame, a plurality of nozzles are arranged on the spraying frame, and the spraying direction of the nozzles is perpendicular to the moving path of the at least one placing unit.

[0037] Further, as a more preferred embodiment of the utility model, the liquid storage unit comprises a water tank and a water pump, an output end of the water pump is connected with the spraying unit through a flexible hose, and a liquid level sensor is arranged in the water tank, and is used for monitoring the residual amount of the nutrient solution in real time. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced.

[0039] Figure 1It is a whole structure perspective schematic view of a rice seedling transfer device in the embodiment.

[0040] Figure 2 It is an internal structure perspective schematic view of the rice seedling transfer device in the embodiment.

[0041] Figure 3 It is a local structure perspective schematic view of the ring surrounding type taking and placing assembly in the embodiment.

[0042] Figure 4 It is a structure perspective schematic view of the spraying assembly in the embodiment.

[0043] Figure 5 It is a structure perspective schematic view of the ring surrounding type taking and placing assembly in the embodiment.

[0044] Reference signs:

[0045] 1 - transfer trolley, 11 - frame assembly, support framework 111, 12 - main box body, 13 - power supply, 14 - pulling handle, 15 - pulley set, 16 - outward opening door, 161 - transparent observation window;

[0046] 2 - ring surrounding type taking and placing assembly, 21 - driving assembly, 211 - servo motor, 2111 - driving shaft, 212 - toggle plate, 2121 - ring tooth, 22 - track assembly, 221 - track path, 222 - transmission chain body, 2221 - connecting column, 2221a - ring groove, 2222 - connecting rod, 223 - inner track frame, 2231 - muscle plate, 224 - outer track frame, 225 - connecting plate, 2251 - hinged hole position, 226 - movable shaft, 23 - placing unit, 231 - supporting plate piece, 2311 - accommodating groove, 232 - connecting frame, 2321 - U-shaped frame;

[0047] 3 - spraying assembly, 31 - liquid storage unit, 311 - water tank, 312 - water pump, 32 - spraying unit, 321 - spraying frame, 322 - nozzle, 33 - swinging assembly, 331 - guide rail, 332 - sliding block, 333 - rack, 34 - power component, 341 - driving motor, 342 - gear

[0048] 4 - control panel. DETAILED DESCRIPTION

[0049] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0050] It should be noted that when an element is referred to as being "fixed" or "disposed" on another component, it can be directly on the other component or indirectly disposed on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0051] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0052] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple", "several" is two or more, unless otherwise specifically limited.

[0053] It should be understood that the structure, proportion, size and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the description, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, and therefore do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. Embodiment

[0054] The present embodiment aims to facilitate the solution to the existing technology that the conventional rice seedling transfer mode is mostly stacked and loaded for transfer, but manual stacking is easy to cause damage to the seedlings, and it is difficult to quickly load and unload; the existing transfer device lacks liquid spraying function, and the survival rate is affected during long-distance transportation. Therefore, with reference to the Figures 1-5 As shown in the figure, the present embodiment provides a rice seedling transfer device, which drives multiple placing units 23 to move continuously along the annular track path 221 through the ring-encircling type taking and placing assembly 2, realizes automatic taking and placing of the seedlings in a ring-encircling manner, and effectively improves the efficiency. The placing unit 23 can be self-adapted to be horizontally maintained under the action of gravity, so as to ensure that the seedlings are always horizontal and avoid tilting; the spraying assembly 3 is arranged on the top of the frame assembly 11, and the spraying area of the spraying assembly 3 can cover the movement path of the placing unit 23, so as to improve the survival rate during long-distance transportation.

[0055] Referring to Figures 1-2 As shown in the accompanying drawings, a rice seedling transfer device includes a transfer vehicle 1, a ring-encircling type taking and placing assembly 2, and a spraying assembly 3. The transfer vehicle 1 is internally provided with a frame assembly 11. It is to be noted that the transfer vehicle 1 includes a main box body 12, a power supply 13 and a pulling handle 14 integrated in the main box body 12. The bottom of the main box body 12 is provided with a plurality of pulley sets 15 or guide rail wheel sets. The guide rail wheel sets are used for adapting to the ground guide rail. The main box body 12 is provided with an outwardly opening door 16. The outwardly opening door 16 can be opened to take out the rice seedlings in the device for planting. Exemplarily, the main box body 12 is composed of a box body made of lightweight aluminum alloy box wall bending and welding. The outer layer is covered with a waterproof coating. The two sides of the box body are provided with a hinged outwardly opening door 16. The door body is provided with a transparent observation window 161 for facilitating real-time observation of the seedling state. In some embodiments, the frame assembly 11 includes two support skeletons 111 symmetrically arranged on the inner walls of the two sides of the main box body 12. The two support skeletons 111 are connected to the main box body 12 by bolts. The support skeletons 111 can be used to support the ring-encircling type taking and placing assembly 2. In some embodiments, the rice seedling transfer device further includes a control panel 4 located above the side wall of the box body and electrically connected to the ring-encircling type taking and placing assembly and the spraying assembly 3. The control panel 4 integrates driving control, spraying switch and liquid level display functions. The power supply 13 is electrically connected to each electrical component to provide electrical energy for driving the operation thereof. The power supply 13 can adopt an existing lithium battery.

[0056] Referring to Figure 2 , 3 As shown in the accompanying drawings, a ring-encircling type taking and placing assembly 2 is installed on the frame assembly 11 and includes a driving assembly 21, a track assembly 22 and at least one placing unit 23.

[0057] The two sides of the frame assembly 11 are respectively provided with the driving assembly 21.

[0058] The two sides of the frame assembly 11 are respectively provided with the driving assembly 21.

[0059] The track assembly 22 includes a ring-shaped track path 221 and a transmission chain body 222 slidably arranged in the track path 221. The driving assembly 21 can drive the transmission chain body 222 to slide along the track path 221.

[0060] The two track assemblies 22 are provided with at least one placing unit 23. The two sides of the at least one placing unit 23 are movably connected to the transmission chain bodies 222 on the two sides of the frame assembly 11. Under the action of the driving assembly 21, the at least one placing unit 23 makes a ring-encircling movement around the track path 221. The placing unit 23 maintains a horizontal state during the movement by gravity.

[0061] Referring to Figure 1 and 4As shown, the spraying component 3 is disposed on the top of the frame component 11, and the spraying area of ​​the spraying component 3 can cover the movement path of the placement unit 23.

[0062] Reference Figure 2 , 3 As shown in Figure 5, in some embodiments, the drive assembly 21 includes a servo motor 211 and a toggle plate 212. The output end of the servo motor 211 is connected to the drive shaft 2111; the axis of the toggle plate 212 is mounted on the drive shaft 2111, and ring teeth 2121 are evenly distributed on its outer periphery; the outer periphery of the toggle plate 212 meshes with at least a portion of the transmission chain 222. It should be noted that the left and right servo motors 211 are synchronized in speed via a controller, which is electrically connected to the control panel 4. The tooth pitch of the outer ring teeth 2121 is precisely matched with the transmission chain 222, reducing meshing wear.

[0063] Reference Figure 2 , 3 As shown in Figure 5, in some embodiments, the transmission chain 222 includes a plurality of connecting posts 2221 slidably connected to the track path 221. Adjacent connecting posts 2221 are movably connected by connecting rods 2222, and the spacing between adjacent connecting posts 2221 matches the rotation trajectory of the actuating plate 212. In some embodiments, ball bearings are embedded on both sides of the connecting posts 2221, and the embedded ball bearings abut against the inner walls of both sides of the track path 221 to ensure smooth sliding in the track path 221.

[0064] Reference Figure 2 , 3 As shown in Figure 5, in some embodiments, the track assembly 22 includes an inner track frame 223 and an outer track frame 224. The inner track frame 223 is fixedly mounted on the frame assembly 11. The outer track frame 224 is fixedly mounted on the frame assembly 11, forming a track path 221 between the inner track frame 223 and the outer track frame 224. A connecting post 2221 is provided with an annular groove 2221a adapted to the track path 221, which can engage with and slide along the track path 221. In some embodiments, the inner track frame 223 is a fixed guide rail, welded to the support frame 111 by stiffeners 2231, while the outer track frame 224 is a detachable limiting rail, bolted to the support frame 111. The inner track frame 223 can be matched with different outer track frames 224 to adapt to different widths of the transmission chain 222. In some embodiments, food-grade grease is pre-coated inside the track path 221 to reduce friction noise and wear.

[0065] Reference Figure 2 , 3 As shown in Figure 5, in some embodiments, the track assembly 22 further includes a plurality of connecting plates 225 and a movable shaft 226.

[0066] Two ends of the plurality of connecting plates 225 are respectively movably connected with adjacent connecting columns 2221. For example, the connecting plate 225 can be a triangular plate, two corners of the triangular plate are respectively connected with adjacent connecting columns 2221 through shafts. The middle part of the connecting plate 225 is provided with a movable shaft 226, the movable shaft 226 is hinged with at least one placing unit 23. For example, the third corner of the triangular plate is provided with a hinged hole 2251, the hinged hole 2251 is used for hinging the movable shaft 226.

[0067] Referring to Figure 2 , 3 and 5, in some embodiments, the at least one placing unit 23 comprises a supporting plate 231 and a connecting frame 232. The top of the supporting plate 231 is provided with a containing groove 2311 for placing the rice seedlings. The two ends of the supporting plate 231 are respectively provided with the connecting frame 232. The top middle part of the connecting frame 232 is hinged with the movable shaft 226, and the bottom of the connecting frame 232 is connected with the supporting plate 231. The placing unit 23 rotates relative to the movable shaft 226 in the surrounding motion through the connecting frame 232, so that the placing unit 23 can be self-adaptively rotated to keep a horizontal state. For example, the connecting frame 232 can be a U-shaped frame 2321, which is arranged upside down, and the middle part of the bottom of the U-shaped frame 2321 is also provided with a hinged hole 2251. The supporting plate 231 is connected with the movable shaft 226 through the U-shaped frame, and the opening of the U-shaped frame faces downward, so as to automatically balance by the gravity center offset of the supporting plate 231. It should be noted that the movable shaft 226 is internally provided with a damper to reduce the shaking amplitude of the supporting plate 231 in a bumpy road condition. In some embodiments, the connecting frame 232 can be detachably hinged with the connecting plate 225 through the movable shaft 226. For example, the connecting frame 232 can also be a triangular frame, and the movable shaft 226 can be separated from the hinged hole 2251 of the triangular frame and the connecting plate 225 to release the connecting frame 232, so that the placing unit 23 can be directly lifted to the rice transplanting area for rice transplanting. For another example, the hinged hole 2251 of the triangular frame can be a hook, which is hooked on the movable shaft 226.

[0068] Referring to Figure 4 , in some embodiments, the spraying assembly 3 comprises a liquid storage unit 31, a spraying unit 32, a swinging assembly 33 and a power component 34.

[0069] The liquid storage unit 31 comprises a water tank and a water pump. The output end of the water pump is connected with the spraying unit 32 through a flexible hose, and the water tank is internally provided with a liquid level sensor for monitoring the remaining amount of the nutrient solution in real time. In some embodiments, the water tank is arranged at the top of the main box body 12 for conveniently adding the nutrient solution. The water tank is detachable, and the capacity is optional. The top of the water tank is provided with a quick water inlet. When the nutrient solution in the water tank is lower than a set threshold, the liquid level sensor sends a signal to the control panel 4, and the control panel 4 displays a warning to remind the user to supplement the liquid.

[0070] The spraying unit 32 is communicated with the liquid storage unit 31 through a flexible hose; the spraying unit 32 comprises a spraying frame 321, and a plurality of nozzles 322 are arranged on the spraying frame 321, and the spraying direction of the nozzles 322 is perpendicular to the moving path of the at least one placing unit 23.

[0071] The swinging assembly 33 is arranged on the spraying unit 32.

[0072] The power component 34 is arranged on the frame assembly 11, and the power component 34 comprises a driving motor 341, and a gear 342 is arranged on the output end of the driving motor 341.

[0073] The power component 34 is in transmission connection with the swinging assembly 33, and is used for driving the swinging assembly 33 to reciprocate and drive the spraying unit 32 to swing and spray the rice seedlings in the at least one placing unit 23.

[0074] The swinging assembly 33 comprises at least one guide rail 331 and at least one sliding block 332.

[0075] The at least one guide rail 331 is connected with the frame assembly 11; the at least one sliding block 332 is in sliding connection with the at least one guide rail 331, one side of the at least one sliding block 332 is in meshing connection with the gear 342 through a rack 333, and the bottom end of the sliding block 332 is connected with the spraying unit 32; the driving motor 341 drives the gear 342 to reverse rotation to drive the spraying unit 32 to reciprocate. In some embodiments, one power component 34 is connected with two swinging assemblies 33.

[0076] The specific working process of the rice seedling transfer device is as follows: the outer opening door 16 is opened, the operator places the rice seedling tray into the tray piece 231, and loads the tray piece 231 on the movable shaft 226; or the tray piece 231 is first loaded on the movable shaft 226, and then the rice seedling tray is placed into the tray piece 231; the outer opening door 16 is closed, the operator pushes the transfer trolley 1 to the target area by pulling the handle 14; the control panel 4 is turned on in the spraying mode, the water pump is started, the nutrient solution is conveyed to the spraying frame 321 through the pipeline, the servo motor 211 drives the gear 342 to reverse rotation, drives the rack 333 and the sliding block 332 to reciprocate transversely, and the atomizing nozzle 322 covers the seedling blade.

[0077] The electronic device provided by the embodiments of the present application is described in detail. The principles and implementation manners of the present application are described by applying specific examples, and the above description of the embodiments is only used to help understand the present application. Meanwhile, according to the idea of the present application, the specific implementation manners and application ranges can be changed by those skilled in the art, and the above description of the present application should not be understood as a limitation.

Claims

1. A rice seedling transfer device, characterized in that, include: The transfer vehicle has an internal frame assembly; A ring-shaped pick-and-place assembly, mounted on the frame assembly, includes: A driving component, wherein the driving component is respectively disposed on both sides of the frame component; The track assembly comprises a track path arranged symmetrically on both sides of the inner side of the frame assembly; the track assembly includes a ring-shaped track path and a transmission chain slidably disposed on the track path; the drive assembly is capable of driving the transmission chain to slide along the track path. At least one placement unit is provided between two track assemblies; the two sides of the at least one placement unit are movably connected to the transmission chain, and the unit moves around the track path under the action of the drive assembly, and the placement unit maintains a horizontal state by gravity during the movement. A spraying assembly is disposed on top of the frame assembly, and the spraying area of ​​the spraying assembly can cover the movement path of the placement unit.

2. The rice seedling transfer device according to claim 1, characterized in that, The driving component includes: A servo motor, the output end of which is connected to a drive shaft; A toggle plate is mounted on the drive shaft, and ring teeth are evenly distributed on its outer periphery; the outer periphery of the toggle plate meshes with at least a portion of the transmission chain.

3. The rice seedling transfer device according to claim 2, characterized in that, The transmission chain includes: Multiple slidable connecting posts are attached to the track path. Adjacent connecting posts are movably connected by connecting rods, and the spacing between adjacent connecting posts matches the rotation trajectory of the toggle plate.

4. The rice seedling transfer device according to claim 3, characterized in that, The track assembly includes: The inner track frame is fixedly mounted on the frame assembly; An outer track frame is fixedly mounted on the frame assembly. The inner track frame and the outer track frame form the track path. The connecting column is provided with an annular groove adapted to the track path. The annular groove can be engaged with the track path and slide along the track path.

5. The rice seedling transfer device according to claim 4, characterized in that, The track assembly also includes: Multiple connecting plates, with both ends of each connecting plate being movably connected to adjacent connecting columns; A movable shaft is provided in the middle of the connecting plate, and the movable shaft is hinged to the at least one placement unit.

6. The rice seedling transfer device according to claim 5, characterized in that, The at least one placement unit includes: A tray component, the top of which is provided with a receiving groove for placing rice seedlings; The connecting frame has connecting frames at both ends of the tray; the top center of the connecting frame is hinged to the movable shaft, and the bottom of the connecting frame is connected to the tray; During the orbital motion, the placement unit rotates relative to the movable axis via the connecting frame, enabling the placement unit to adaptively rotate to maintain a horizontal state.

7. The rice seedling transfer device according to claim 1, characterized in that: The spraying assembly includes: The liquid storage unit is used to store nutrient solution; The spraying unit is connected to the liquid storage unit via a flexible hose; A swing assembly, wherein the spraying unit is disposed on the swing assembly; A power unit is installed on the frame assembly and is connected to the swing assembly for driving the swing assembly to reciprocate and drive the spraying unit to swing and spray the rice seedlings in the at least one placement unit.

8. The rice seedling transfer device according to claim 7, characterized in that: The power component includes: a drive motor, the output end of which is equipped with a gear; The swing component includes: At least one guide rail, said at least one guide rail being connected to the frame assembly; At least one slider is slidably connected to at least one guide rail. One side of the at least one slider meshes with the gear via a rack. The bottom end of the slider is connected to the spraying unit. The drive motor drives the gear to rotate forward and backward to drive the spraying unit to reciprocate.

9. The rice seedling transfer device according to claim 8, characterized in that: The spraying unit includes a spraying frame with multiple nozzles, the spraying direction of which is perpendicular to the moving path of the at least one placement unit.

10. The rice seedling transfer device according to claim 7, characterized in that: The liquid storage unit includes a water tank and a water pump. The output end of the water pump is connected to the spraying unit through a flexible hose, and the water tank is equipped with a liquid level sensor for real-time monitoring of the remaining nutrient solution.

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