Wheat seedling spraying device and spraying method

Abstract

The present application relates to a wheat seedling spray device and spraying method, belonging to the technical field of wheat fusarium head blight atomization identification. The device includes a movable frame, a plurality of bottom atomizing components arranged below the movable frame, and a top atomizing mechanism arranged on the movable frame. The bottom atomizing component includes a movable column, a bendable tube body and a spraying part. The spraying part includes an atomizing nozzle and a compensating spray nozzle. The bendable tube body can be moved along a specific path to the periphery of the wheat seedling root under the guidance of a guide structure. The top atomizing mechanism is provided with a pump body, a spray tube and a plurality of downward-facing atomizers, which are used to atomize the wheat seedlings from above, realize three-dimensional spray coverage from top to bottom, and improve the spraying uniformity and prevention and control effect.

Description

Technical Field

[0001] The present application relates to the technical field of atomization identification of wheat scab, and in particular to a wheat seedling spraying device and a spraying method. Background Art

[0002] Fusarium head blight (FHB) is a serious wheat disease caused by the fungus Fusarium graminearum. This disease not only affects yield but also causes wheat grains to be contaminated with mycotoxins (particularly deoxynivalenol (DON), posing a threat to human and animal health.

[0003] At present, the identification of resistance to fusarium spp. is mainly carried out by spreading infected corn kernels and using an atomizer to spray water to increase the local environmental humidity, thereby providing artificial conditions for the occurrence of fusarium spp. Therefore, the identification of resistance to fusarium spp. is generally carried out in experimental farmlands, and each experimental wheat seedling is evenly and spaced in the experimental farmland and numbered to facilitate the experimenters to walk around in the farmland or push the experimental equipment to move. For example, a wheat fusarium spp. inoculation spray moisturizing device disclosed in application number 201820620529.7 and a wheat fusarium spp. inoculation spray moisturizing device disclosed in application number 202010444018.6 realize the identification of resistance to fusarium spp. by spraying water mist on the experimental wheat seedlings to form local environmental humidity.

[0004] After research, the applicant found that in the existing technology, when the test wheat seedlings in the test farmland are sprayed with an atomizer, a spraying blind spot often occurs because the water mist sprayed by the atomizer is from top to bottom. That is, the blind spot appears below the leaves of the wheat seedlings, resulting in unsatisfactory atomization effect and ultimately poor identification effect; at the same time, manual spraying to the blind spot will lead to low efficiency and easily damage the wheat seedlings. Summary of the Invention

[0005] The embodiments of the present application provide a wheat seedling spray device and a spraying method, which improve the atomization effect and are not likely to damage the wheat seedlings, so as to at least partially solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a wheat seedling spray device is provided, comprising: a movable frame, a water storage tank is installed on the top of which and a spray space is reserved at the lower end; a top atomizing mechanism is installed on the movable frame, the top atomizing mechanism is connected to the upper area below the water storage tank and in the spray space, and is used to spray water mist from top to bottom toward the wheat seedlings in the spray space; a bottom atomizing mechanism comprises a pushing component and a bottom atomizing component, the pushing component is arranged on one side of the movable frame, the bottom atomizing component is arranged on the pushing component and is connected to the water storage tank, the pushing component is used to drive the bottom atomizing component to move, and the bottom atomizing component is used to spray water mist from bottom to top toward the bottom of the leaves of the wheat seedlings in the spray space; a movable guide mechanism The invention relates to a structure comprising a moving component and a peripheral guide component, wherein the moving component is arranged on the other side of the moving frame, and the peripheral guide component is arranged on the moving component. The moving component can drive the peripheral guide component to move, and the peripheral guide component can be entered by the bottom atomization component; wherein, during the movement of the moving frame in the experimental farmland, the bottom atomization component and the peripheral guide component can both be located at positions on the moving frame avoiding the wheat seedlings; after the moving frame is moved to the preset position, the peripheral guide component can be moved to the periphery of the roots of the wheat seedlings and avoid the leaves of the wheat seedlings under the action of the moving component, and at the same time, the bottom atomization component can enter the peripheral guide component under the action of the pushing component, so that the bottom atomization component circumferentially surrounds the periphery of the roots of the wheat seedlings.

[0007] Optionally, the pushing assembly includes a vertical moving part, which includes a first cylinder and a moving column. The first cylinder is installed on one side of the moving frame, and the piston rod of the first cylinder extends vertically downward. The moving column is installed at the end of the piston rod of the first cylinder, and the length direction of the moving column is parallel to the arrangement direction of the planted wheat seedlings. The bottom atomization assembly is provided with multiple intervals between the moving column and the moving frame.

[0008] Optionally, the bottom atomizing assembly includes a water pumping part, a first spraying part and a second spraying part, wherein the water pumping part includes a water pump, a main pipe and an accordion hose, the water pump is installed on the top of the mobile frame, the pump inlet end of the water pump is connected to the water tank, the main pipe is connected to the pump outlet end of the water pump, the length direction of the main pipe is parallel to the length direction of the mobile column, and the accordion hose is connected in multiple groups on the main pipe; the first spraying part includes a bendable tube body, a mobile hose and an atomizing nozzle, the mobile column is provided with a bending channel with an open upper end, the bendable tube body is slidably arranged in the bending channel, the mobile hose is inserted into the bendable tube body and is used to follow the adaptive bending of the bendable tube body The mobile hose is curved, and a plurality of atomizing nozzles are arranged at intervals along the extension direction of the mobile hose, and the atomizing nozzles are tilted upward and toward the blind area below the wheat seedling leaves after passing through the bendable tube body, and the end of the accordion hose away from the water pump is connected to the mobile hose; the pushing assembly also includes a horizontal pushing member, which is used to push the bendable tube body to move in the bending channel and the peripheral guide assembly; the second sprayer includes a compensation tube and a compensation spray head, and an embedding groove is provided on the upper surface of the movable column, and the compensation tube is embedded in the embedding groove and is connected to the accordion hose, and the compensation spray head is connected to the top end of the compensation tube, and the compensation spray head is tilted upward and toward the blind area below the wheat seedling leaves.

[0009] Optionally, the bending channel includes a first segment, an arc segment and a second segment that are connected in sequence, the extension direction of the first segment is parallel to the length direction of the movable column, the extension direction of the second segment is perpendicular to the length direction of the movable column in the horizontal plane, and the arc segment is used to smoothly turn the first segment and the second segment to connect; the bendable tube is formed by axially connecting a plurality of hollow circular tubes, adjacent hollow circular tubes are hinged and can be bent relative to each other, the outer diameter of the hollow circular tube is adapted to the inner diameter of the bending channel, and the movable hose is embedded in the plurality of hollow circular tubes; the upper surface of the hollow circular tube is provided with a hole for the atomizing nozzle to pass vertically The first opening is passed through the hollow circular tube, and the upper surface of the hollow circular tube is also provided with a second opening for the accordion hose to pass through. A positioning groove is provided on the inner wall of the bending channel along the extension direction of the bending channel, and a positioning block is provided on the outer wall of the hollow circular tube. The positioning block slides in cooperation with the positioning groove so that the hollow circular tube always remains in a state in which the first opening and the second opening are vertically facing upward during the movement; the peripheral guide component can be moved to a position where the second section is docked under the action of the moving component, so that the peripheral guide component and the bending channel form a complete moving path surrounding the root periphery of the wheat seedling, and the moving path can be used for the movement of the bendable tube body.

[0010] Optionally, the horizontal pushing member includes a second cylinder and a pushing plate, the second cylinder is arranged on the side wall of the movable column, and the extension direction of the piston rod of the second cylinder is consistent with the length direction of the first section, the piston rod of the second cylinder extends into the first section, and the pushing plate is arranged at the end of the piston rod of the second cylinder and is connected to the tube end of the hollow circular tube located at the end of the bendable tube body; when the peripheral guide assembly is connected to the second section, when the second cylinder is extended to the maximum extension length, part of the bendable tube body can be pushed into the peripheral guide assembly so that it is located at the periphery of the root of the wheat seedling.

[0011] Optionally, the moving assembly includes a vertical lifting member, which includes a multi-stage cylinder and an abutment column. The multi-stage cylinder is arranged on the moving frame, and the piston rod of the multi-stage cylinder extends vertically downward. The abutment column is arranged at the end of the piston rod of the multi-stage cylinder. The abutment column and the moving column are parallel to each other. The peripheral guide assembly is provided with multiple intervals at the abutment columns, and one bottom atomization assembly corresponds to one peripheral guide assembly in the horizontal direction.

[0012] Optionally, the moving assembly also includes a horizontal push member, which includes a hydraulic rod, a guide tube, and a flexible pushing body, wherein the guide tube includes a vertical pipe section, an arc-shaped pipe section and a horizontal pipe section that are connected in sequence from top to bottom, the horizontal pipe section is installed in the abutment column, and the length direction of the horizontal pipe section is perpendicular to the length direction of the abutment column, the vertical pipe section is vertically arranged and connected to the horizontal pipe section through the arc-shaped pipe section; the flexible pushing body includes a connecting rope and a plurality of rolling balls, the rolling balls are radially penetrated by a through-hole for the connecting rope to pass through, and the plurality of rolling balls are passed through the through-holes on the connecting rope, the inner diameter of the guide tube is adapted to the outer diameter of the rolling balls, so that the plurality of rolling balls can move from a vertical arrangement state to a horizontal arrangement state in the guide tube, and the two rolling balls at the very end are fixedly connected to the connecting rope The cam is connected to the upper end of the hydraulic cylinder to form a circle around the bottom end of the hydraulic cylinder, and the upper end of the hydraulic cylinder is connected to the upper end of the hydraulic cylinder to form a circle around the bottom end of the hydraulic cylinder.

[0013] Optionally, the peripheral guide assembly includes a connected butt joint tube and an arc-shaped bend pipe, both of which are open at the upper ends, wherein after the peripheral guide assembly approaches the movable column under the action of the horizontal push member, the butt joint tube is linearly docked and connected with the second section, and the end of the arc-shaped bend pipe away from the butt joint tube abuts against the side wall of the movable column, so that the second section, the butt joint tube and the arc-shaped bend pipe form a complete moving path surrounding the root periphery of the wheat seedling, and the moving path avoids the leaves of the wheat seedling; under the action of the horizontal pushing member, the compensating spray head and the atomizing nozzle can circumferentially surround the root periphery of the wheat seedling and spray water mist to the blind area below the leaves of the wheat seedling.

[0014] Optionally, the top atomization mechanism includes a pump body, a spray pipe and an atomizer. The pump inlet end of the pump body is connected to the water tank, the spray pipe is connected to the pump outlet end of the pump body, and the length direction of the spray pipe is parallel to the arrangement direction of the wheat seedlings below the spray space. Multiple atomizers are connected in the length direction of the spray pipe, and the atomizers are all vertically downward.

[0015] According to a second aspect of the present application, a spraying method is provided, which is implemented based on the wheat seedling spraying device described in the first aspect above, comprising the following steps:

[0016] Move the mobile frame into the experimental farmland, avoid the wheat seedlings during the movement, and move on the land between two adjacent rows of wheat seedlings, so that the spray space is finally above one row of wheat seedlings in the experimental farmland;

[0017] Then, the horizontal Z-direction position of the movable frame is adjusted so that the multiple bottom atomizing assemblies correspond to the multiple seedlings on a row of wheat seedlings in the horizontal position;

[0018] Then, the horizontal X-direction position of the movable frame is adjusted so that the movable frame moves horizontally in a directional manner and actively approaches the multiple seedlings on a row of wheat seedlings until the movable frame approaches the multiple seedlings on a row of wheat seedlings and stops moving;

[0019] The moving assembly is activated, causing the moving assembly to drive the peripheral guide assembly toward the plurality of wheat seedlings in a row in the horizontal X direction until the peripheral guide assembly abuts against the side wall of the moving column and stops. At this time, the peripheral guide assembly and the pushing assembly circumferentially surround the roots of the wheat seedlings.

[0020] Then, the pushing assembly is activated to allow the bottom atomizing assembly to partially enter the peripheral guide assembly, so that the bottom atomizing assembly circumferentially surrounds the root periphery of the wheat seedling;

[0021] Finally, start the bottom atomization component and the top atomization mechanism, so that the bottom atomization component sprays water mist from bottom to top toward the blind area below the wheat seedling leaves, and the top atomization mechanism sprays water mist from top to bottom toward the top of the wheat seedlings in the spray space.

[0022] The wheat seedling spray device of the embodiment of the present application is able to achieve three-dimensional, multi-angle full coverage spraying of wheat seedlings during the spraying process by setting a structure in which a bottom atomizing assembly and a top atomizing mechanism work together. In the bottom atomizing assembly, the bendable tube body can flexibly move between the bending channel and the peripheral guide assembly, so that the spray component can approach and operate around the periphery of the wheat seedling roots, and the compensating spray head and the atomizing nozzle can effectively spray the blind area below the wheat leaves; and the multiple vertical downward atomizers set in the top atomizing mechanism can cover a large area from above, thereby compensating for the spray dead angle problem existing in traditional devices to a certain extent and enhancing the prevention and control effect. The overall structural design is beneficial to improving the uniformity and targeting of the spray, reducing the amount of pesticide used and loss, and at the same time reducing the physical interference with the wheat seedlings. It is suitable for accurate and efficient plant protection treatment in densely planted farmland environments and has strong practicality and promotion value.

[0023] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0025] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0026] Figure 1 This is a schematic diagram of the structure provided in the exemplary embodiment of the present disclosure. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure provided in the exemplary embodiment of the present disclosure. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the structure provided in the exemplary embodiment of the present disclosure. Figure 3 ;

[0029] Figure 4 yes Figure 2 A local enlarged schematic diagram in FIG.

[0030] Figure 5 is a schematic diagram of a partial structure of a bendable tube provided in an exemplary embodiment of the present disclosure;

[0031] Figure 6 is a right side view provided in an exemplary embodiment of the present disclosure;

[0032] Figure 7 is a partial cross-sectional view for illustrating a horizontal telescopic member provided in an exemplary embodiment of the present disclosure;

[0033] Figure 8 2 is a schematic diagram of a partial structure of a bendable pushing body provided in an exemplary embodiment of the present disclosure.

[0034] Description of reference numerals:

[0035] 1. Mobile frame; 11. Water storage tank; 2. Top atomizing mechanism; 21. Pump body; 22. Spray pipe; 23. Atomizer; 3. Bottom atomizing mechanism; 31. Pushing assembly; 311. Vertical moving member; 3111. First cylinder; 3112. Moving column; 312. Horizontal pushing member; 3121. Second cylinder; 3122. Pushing plate; 32. Bottom atomizing assembly; 321. Water pumping member; 3211. Water pump; 3212. Main pipe; 3213. Organ hose; 322. First spraying member; 3221. Bendable tube; 3221a. Hollow circular tube; 3221b. Positioning block; 3222. Moving hose; 3223. Atomizing nozzle; 323. Second spraying member; 3231. Compensating pipe; 3 232. Compensating spray head; 4. Moving guide mechanism; 41. Moving assembly; 411. Vertical lifting member; 4111. Multi-stage cylinder; 4112. Abutment column; 412. Horizontal push member; 4121. Hydraulic rod; 4122. Guide pipe; 4122a. Vertical pipe section; 4122b. Arc-shaped pipe section; 4122c. Horizontal pipe section; 4123. Bendable pusher; 4123a. Connecting rope; 4123b. Rolling ball; 42. Peripheral guide assembly; 421. Docking pipe; 422. Arc-shaped bend pipe; 5. Bending channel; 51. First section; 52. Arc-shaped section; 53. Second section; 54. Positioning groove; 6. Abutment plate; 7. Horizontal telescopic member; 71. Horizontal telescopic pipe; 72. Spring. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0037] This application provides a wheat seedling spraying device and spraying method, please refer to Figures 1 to 8 .

[0038] First, combining Figures 1 to 3 The present application provides a wheat seedling spray device, which includes a movable frame 1, a top atomizing mechanism 2, a bottom atomizing mechanism 3 and a movable guide mechanism 4. The specific structure and function are as follows:

[0039] Exemplarily, the mobile frame 1 is the main supporting structure, and a water tank 11 for storing spray water is installed on the top of the mobile frame 1. An open area is reserved at the lower end of the mobile frame 1 as a spray space. The size of the spray space is designed so that it covers the wheat seedlings without touching the wheat plants, which is beneficial for avoiding mechanical contact with the crops during the movement of the device. The top atomization mechanism 2 is arranged on the upper part of the mobile frame 1. It is connected to the water tank 11 through a pipeline and is installed in the upper area of ​​the spray space, which can realize top-down water mist spraying. The layout of the top atomization mechanism 2 helps to form a continuous high-humidity environment in the top leaf area of ​​the wheat seedlings, thereby inducing the onset of ergot disease and assisting in resistance identification.

[0040] Exemplarily, the mobile frame 1 is a rectangular frame, and the bottom ends of the four frames are provided with self-locking universal wheels, so that it can be easily moved.

[0041] Exemplarily, the bottom atomizing mechanism 3 is used in conjunction with the top spray structure. The bottom atomizing mechanism 3 mainly includes a pushing component 31 and a bottom atomizing component 32, wherein the pushing component 31 is arranged on one side of the mobile frame 1, and is used to drive the bottom atomizing component 32 to move in the horizontal direction. The bottom atomizing component 32 is arranged on the pushing component 31, and its structure is also connected to the water tank 11, so that the water mist can be sprayed from bottom to top, and the spraying direction is directed to the area below the leaves of the wheat seedlings. The beneficial effect of this design is that it can solve the problem that the traditional top-down spraying method cannot cover the back of the leaves to a certain extent, especially under dense planting conditions, the shadow area of ​​the overlapping leaves can also be covered by water mist, which helps to evenly cover the water mist on all parts of the plant, thereby improving the effectiveness of ergot inoculation.

[0042] Exemplarily, in order to enable the bottom atomizing assembly 32 to approach the periphery of the roots of the wheat seedlings during spraying and to avoid interference with the plants in a non-working state, a movable guide mechanism 4 is provided. The movable guide mechanism 4 includes a movable assembly 41 and a peripheral guide assembly 42. The movable assembly 41 is mounted on the other side of the movable frame 1, and the peripheral guide assembly 42 is mounted on the movable assembly 41 and can move horizontally with the movement of the movable assembly 41. After the movable frame 1 stops at the target position, the peripheral guide assembly 42 is driven by the movable assembly 41 to slide horizontally and gradually approach the wheat seedlings, so that it is in the peripheral area of ​​the roots of the wheat seedlings and avoids the leaf area of ​​the wheat seedlings. At this time, the pushing assembly 31 acts synchronously, so that the bottom atomizing assembly 32 partially enters the interior of the peripheral guide assembly 42 and forms a ring layout around the periphery of the roots of the wheat seedlings. This surround layout is conducive to achieving multi-angle and multi-directional coverage of the lower area of ​​the leaves during spraying, thereby enhancing the penetration ability of the water mist into the blind area of ​​the spraying.

[0043] In this way, during the entire spraying operation, the mobile frame 1 avoids crushing or damaging the growing crops by moving along the interval soil area between the rows of wheat seedlings. At the same time, through controllable propulsion and retraction actions, the bottom atomizing component 32 and the peripheral guide component 42 are in a waiting state in the non-spraying state, and in the spraying state, they can reasonably avoid the wheat leaves and spray water mist to the spray blind area, which is beneficial to improving work efficiency and stability. Combining the above-mentioned structural and functional designs, the spray device can provide higher consistency and repeatability in the wheat ergot resistance identification test, thereby improving the reference value of the identification results and operational safety.

[0044] In some embodiments, as Figures 1 to 4 As shown, in order to achieve more accurate coverage of the area below the wheat seedling leaves during the spraying process and to achieve vertical precise positioning of the bottom atomization component 32 without contacting the main body of the crop, this embodiment further optimizes the design of the structure of the pushing component 31. Specifically, the pushing component 31 includes a vertical moving member 311, and the vertical moving member 311 includes a first cylinder 3111 and a moving column 3112. The first cylinder 3111 is installed on one side of the movable frame 1, and its piston rod extends downward in the vertical direction, which is convenient for driving the connecting parts to move up and down to a certain extent, thereby achieving fine control of the spray position. The moving column 3112 is fixedly mounted on the end of the piston rod of the first cylinder 3111, and its length direction is consistent with the arrangement direction of the planted wheat seedlings, that is, when the device moves along the ridge direction, the extension direction of the moving column 3112 is parallel to the wheat planting row, which is beneficial to structural alignment and spray consistency control.

[0045] In addition, a plurality of bottom atomizing assemblies 32 are provided between the mobile column 3112 and the mobile frame 1, and each bottom atomizing assembly 32 is fixed to the mobile column 3112 by a support or a connecting member, and is connected to the water tank 11, and is used to spray the water mist from bottom to top to the wheat seedlings in the spray space during operation. Each bottom atomizing assembly 32 is arranged corresponding to a seedling in an adjacent row of wheat seedlings, which is conducive to achieving the positioning spraying of a single seedling. By setting the first cylinder 3111 to vertically control the mobile column 3112, the bottom atomizing assembly 32 can be moved down to the area below the seedling leaves in the working state, and retracted to the top of the device body in the non-working state, thereby reducing the mechanical interference with the wheat seedlings to a certain extent. In addition, the interval setting of the bottom atomizing assembly 32 is arranged according to the planting spacing of wheat to avoid the occurrence of wrong spraying, repeated spraying or missed spraying, and improve the uniformity and accuracy of the overall spraying operation. Therefore, the above structure not only helps to solve the technical problem of existing spray blind areas, but also helps to improve the reproducibility and operational efficiency of ergot resistance identification.

[0046] In some examples, combined Figures 1 to 4 The bottom atomizing assembly 32 includes a water pump 321, a first spraying member 322 and a second spraying member 323. The structures of each part cooperate with each other to form multi-angle spray paths in different directions to enhance the coverage range.

[0047] The water pumping component 321 mainly includes a water pump 3211, a main pipe 3212, and an accordion hose 3213. The water pump 3211 is arranged on the top of the mobile frame 1 to provide sufficient water pressure. The pump inlet end of the water pump 3211 is connected to the water tank 11, and can directly draw water from the water tank 11 when the water pump 3211 is started; the pump outlet end is connected to the main pipe 3212. The main pipe 3212 is arranged in a direction parallel to the mobile column 3112, which is conducive to the reasonable distribution of the water supply paths of the multiple bottom atomization components 32, shortening the water flow transmission path, reducing pressure drop fluctuations, and improving the stability of the water mist spray. The main pipe 3212 is connected to multiple groups of accordion hoses 3213. The hoses have good flexibility and deformability and can adapt to access requirements in different directions.

[0048] The first spray element 322 comprises a flexible tube 3221, a movable hose 3222, and an atomizing nozzle 3223. The flexible tube 3221 slides within the open-top bending channel 5 provided on the movable column 3112, providing the structure with horizontal scalability and guidance. The movable hose 3222 is inserted within the flexible tube 3221 and adaptively bends as the flexible tube 3221 moves and deforms. Driven by the horizontal pusher 312 of the push assembly 31, the movable hose 3222 enters the peripheral guide assembly 42 and forms a partially encircling arrangement around the roots of the wheat seedlings. Multiple atomizing nozzles 3223 are spaced apart on the movable hose 3222. These nozzles are tilted upward and directed toward the blind spot below the wheat seedling leaves. After exiting the flexible tube 3221, they are positioned near the lower leaf area of ​​the wheat seedlings, facilitating water mist spraying from multiple directions below the leaves.

[0049] In order to further enhance the continuity and density of the spray coverage, a second spray element 323 is also provided, including a compensation tube 3231 and a compensation spray head 3232. The compensation tube 3231 is embedded in the embedded groove provided on the upper surface of the movable column 3112. The embedded groove serves to locate and hide the pipeline, which is beneficial to reduce structural redundancy and improve the compactness of the device. One end of the compensation tube 3231 is connected to the accordion hose 3213, and the other end extends to the top of the movable column 3112. The top end is connected to the compensation spray head 3232. The compensation spray head 3232 is also tilted upward and toward the blind spot below the leaves of the wheat seedlings. It is used to perform water mist filling spraying on the gap directly above the root area, thereby compensating to a certain extent for the area that is not fully covered by the spray angle of the atomizing nozzle 3223 and improving the uniformity of the spray.

[0050] In summary, after the device moves to the target position, the coordinated action of the push assembly 31 and the movable assembly 41 brings the peripheral guide assembly 42 closer to the root zone surrounding the wheat seedlings. The horizontal pusher 312 then slides the flexible tube 3221 in the first spray element 322 into the peripheral guide assembly 42, achieving a partially encircling arrangement. Finally, the water pump 3211 is activated to sequentially transport water from the water tank 11 through the accordion hose 3213 and the movable hose 3222 to the atomizing nozzle 3223 and the compensating spray nozzle 3232, thereby achieving bottom-up, encircling, multi-point water mist spraying. This structure improves coverage of blind areas and is also beneficial for improving the uniformity and consistency of the spray treatment during the ergot resistance assessment process. It should be noted that the term "partial surround" means that the bendable tube 3221 and the nozzle are distributed in an arc-shaped path around the periphery of the wheat seedling roots, rather than a completely closed 360° surround, so as to avoid unnecessary contact risks or complexity in the structure, and also facilitate structure retraction and maintenance operations.

[0051] In some cases, combined Figure 4 and Figure 5 To achieve flexible guidance and stable transport of the flexible tube 3221 within a confined space, this embodiment features a detailed design of the bending channel 5 and the flexible tube 3221, further enhancing the adaptability and control accuracy of the spray tube 22 as it traverses the structural path. Specifically, the bending channel 5 comprises a first segment 51, an arcuate segment 52, and a second segment 53, which are connected in sequence. The first segment 51 extends parallel to the length of the movable column 3112, while the second segment 53 extends perpendicular to the length of the movable column 3112 in the horizontal plane. The arcuate segment 52 serves as a connecting structure, and its curvature facilitates smooth turning between the first and second segments 51, 53. This bending channel 5 guides the flexible tube 3221 through its bending motion within a confined space, saving lateral space for the structural layout and, to a certain extent, reducing the risk of the spray device contacting surrounding wheat seedlings during field movement, thereby minimizing damage caused by accidental contact.

[0052] Furthermore, the bendable tube body 3221 is formed by a plurality of hollow circular tubes 3221a that are hingedly connected along the axial direction, and a relatively rotatable connection structure is adopted between adjacent hollow circular tubes 3221a, so that the entire tube body has a certain structural flexibility and controllable bending performance, and can adaptively deform and move along the bending channel 5. The outer diameter of each hollow circular tube 3221a is adapted to the inner diameter of the bending channel 5 to ensure that it remains stable and does not shake when sliding in the channel. At the same time, a movable hose 3222 is embedded in the interior of the plurality of hollow circular tubes 3221a. The movable hose 3222 moves synchronously with the movement of the hollow circular tubes 3221a and undergoes flexible deformation, thereby maintaining the internal water supply patency in the bending paths at different angles, thereby enhancing the continuity and reliability of the spray system.

[0053] For example, the upper surface of the hollow circular tube 3221a is provided with two functional openings: one is a first opening for the atomizing nozzle 3223 to pass through and is vertically upward, which is used to realize the vertical spraying function of the spray device; the other is a second opening for the accordion hose 3213 to pass through, so that the accordion hose 3213 can complete fluid communication within the structure, improving the compactness of the overall arrangement. A positioning block 3221b is provided on the outer wall of the hollow circular tube 3221a. The positioning block 3221b is fixedly arranged along the length of the circular tube and slides in cooperation with the positioning groove 54 extending from the inner wall of the bending channel 5. With the help of this guiding structure, the hollow circular tube 3221a can maintain a stable direction during the sliding process, so that the first opening and the second opening always remain in an upward state during the movement. This structural guiding method is helpful to a certain extent in avoiding problems such as nozzle angle misalignment or hose water inlet direction deviation.

[0054] In addition, before the spraying action begins, the moving component 41 will first move the peripheral guide component 42 to a position corresponding to the second segment 53 in the bending channel 5, so that the bending channel 5 and the peripheral guide component 42 form a continuous docking structure, forming a moving path around the periphery of the wheat seedling roots. Through this path, the bendable tube body 3221 can be continuously pushed by the pushing member to enter the peripheral guide component 42 to achieve a partial surrounding layout, thereby completing the spatial deployment of the atomizing nozzle 3223 and providing path guarantees for the subsequent spraying process. It should be noted that the term "smooth steering" is used to describe the geometric connection state between the arc segment 52 and the first segment 51 and the second segment 53. Its design takes into account the structural transition angle and curvature continuity to reduce the deformation stress of the tube body during movement and improve the smoothness of operation.

[0055] In some embodiments, combined Figure 3 and Figure 4 The horizontal pusher 312 comprises a second cylinder 3121 and a push plate 3122. The second cylinder 3121 is fixedly mounted on the sidewall of the movable column 3112. Its piston rod extends in the same direction as the length of the first section 51 in the bending channel 5, enabling linear telescopic movement along this path. Structurally, the piston rod of the second cylinder 3121 penetrates and extends into the interior of the first section 51. The push plate 3122 is mounted at the end of the piston rod and connects to the end of the hollow circular tube 3221a at the extreme end of the bendable tube 3221. This connection structure enables the entire bendable tube 3221 to be pushed.

[0056] When the spray device enters the spray preparation stage, the peripheral guide assembly 42 and the second section 53 have completed docking, thereby forming a complete movable passage around the roots of the wheat seedlings. On this basis, by controlling the action of the second cylinder 3121, its piston rod is pushed in the extension direction of the first section 51, driving the push plate 3122 to move forward together, and the push plate 3122 then applies a force to the bendable tube body 3221, pushing it out of the bending channel 5 in turn and into the peripheral guide assembly 42. As the pushing process proceeds, the bendable tube body 3221 gradually unfolds in the passage and surrounds the periphery of the roots of the wheat seedlings, driving the atomizing nozzle 3223 to form an annular distribution structure, which is beneficial to improving the coverage of the blind area of ​​the wheat seedling roots by the atomized liquid in the subsequent spraying process.

[0057] The "push plate 3122" in the above structure is mainly responsible for transmitting the linear driving force to the end of the bendable tube 3221. In order to avoid dislocation or breakage when the thrust is applied, it is fixedly connected to the hollow circular tube 3221a by a snap-on or screw-on structure, which has a certain degree of convenience in assembly and disassembly. The "maximum extension length" here is not an absolute value, but refers to the position where the bendable tube 3221 can be pushed out to meet the spray arrangement requirements within the set stroke range of the second cylinder 3121. The length should be parameter-matched and set according to the overall path length of the bending channel 5 and the peripheral guide assembly 42. Through this structural combination and control method, the device has greater flexibility and adaptability in field operations, which is beneficial to the automated adaptation and precise spraying of wheat seedlings at different arrangement spacings.

[0058] In some embodiments, combined with Figure 1 、 Figure 6 as well as Figure 7 In order to enable the peripheral guide assembly 42 to flexibly adjust its position in the vertical direction according to the plant height of different wheat seedlings, so as to match the output path of the bendable tube body 3221 and optimize the spray coverage effect, the mobile assembly 41 in this embodiment includes a vertical lifting member 411, and the vertical lifting member 411 is specifically composed of a multi-stage cylinder 4111 and an abutment column 4112. The multi-stage cylinder 4111 is installed on the mobile frame 1, and its piston rod is arranged vertically downward, which can provide a stable vertical telescopic driving force. The abutment column 4112 is arranged at the end of the piston rod of the multi-stage cylinder 4111. Its main body is in the form of a slender rod body, and is arranged in a direction parallel to the mobile column 3112 to form a connectable or supporting structural relationship with the peripheral guide assembly 42 in the vertical direction.

[0059] In terms of structural layout, multiple peripheral guide assemblies 42 are arranged on multiple abutment columns 4112 at certain intervals, and in the horizontal direction, each bottom atomization assembly 32 corresponds to a peripheral guide assembly 42 one by one. This arrangement enables the spray device to have strong adjustment capabilities in both the horizontal and vertical dimensions, adapting to the distribution areas of wheat seedlings with different densities and heights. In actual spraying operations, it is beneficial to improve the uniformity of atomization coverage and the effectiveness of blind spot compensation. The term "multi-stage cylinder 4111" is used here to refer to a cylinder form that can provide a longer telescopic stroke through multiple concentric sleeve structures, and "multiple are arranged at intervals" means that there is a preset spacing between the peripheral guide assemblies 42 when they are distributed along the abutment columns 4112, so as to facilitate group control and position allocation.

[0060] In some embodiments, combined with Figure 1 、 Figure 6 as well as Figure 7To enable the peripheral guide assembly 42 to flexibly adjust its horizontal movement, thereby coordinating with the bendable tube 3221 for accurate positioning and atomization, the movable assembly 41 in this embodiment further includes a horizontal pusher 412. The specific structure of the horizontal pusher 412 comprises a hydraulic rod 4121, a guide tube 4122, and a bendable pusher 4123. The guide tube 4122 is composed of a vertical tube section 4122a, an arcuate tube section 4122b, and a horizontal tube section 4122c, which are connected in sequence. The horizontal tube section 4122c is mounted within the abutment column 4112, and its length is perpendicular to the length of the abutment column 4112. The vertical tube section 4122a extends upward, forming a smooth transition connection with the horizontal tube section 4122c through the arcuate tube section 4122b, thereby guiding the pusher from vertical motion to horizontal motion. The flexible propulsion element 4123 is composed of multiple rolling balls 4123b and a connecting rope 4123a. Each rolling ball 4123b is connected to the connecting rope 4123a via holes formed in the balls. The rolling balls 4123b at each end are fixedly connected to the connecting rope 4123a to enhance propulsion stability. The outer diameter of the rolling balls 4123b is compatible with the inner diameter of the guide tube 4122, allowing them to gradually change their arrangement along the curved section after entering the vertical section, ultimately propelling the object horizontally.

[0061] A hydraulic rod 4121 is fixed to the mobile frame 1, with its piston rod extending vertically downward into the vertical tube section 4122a. An abutment plate 6 is located at the end of the piston rod of the hydraulic rod 4121, connecting with the topmost rolling ball 4123b. When the hydraulic rod 4121 is in operation and the piston rod extends downward, the flexible pusher 4123 is pressed into the guide tube 4122 and ultimately into the coaxially connected horizontal telescopic tube 71. The horizontal telescopic tube 71 is provided with a telescopic channel extending in the same direction as the horizontal tube section 4122c, and its sidewalls are mounted with peripheral guide assemblies 42.

[0062] In this way, when the flexible pusher 4123 continues to move forward, it will drive the extension of the horizontal telescopic tube 71, thereby achieving horizontal proximity with the peripheral guide assembly 42 as a whole in the direction of the movable column 3112. To ensure the retraction function, a spring 72 is installed between the peripheral guide assembly 42 and the abutment column 4112. The spring 72 can provide a rebound force after the hydraulic rod 4121 stops working, so that the horizontal telescopic tube 71 has a tendency to shorten after the external force is released, thereby driving the peripheral guide assembly 42 to automatically reset, which is beneficial to the repeated implementation of multiple rounds of spraying and the stable operation of the entire device. In this embodiment, the "flexible pusher 4123" is used to describe a power transmission unit that is flexible and can change shape with the direction of the pipeline. The "guide tube 4122" is used to define the movement path, and the "horizontal telescopic member 7" is used to realize an extendable horizontal movement mechanism. Its structural arrangement helps to improve the spatial adaptability of the system and the flexibility of the spray arrangement.

[0063] In some embodiments, combined with Figure 4 as well as Figure 7 In order to enable the spray path to form a closed or nearly closed annular structure around the periphery of the wheat seedling roots and avoid the more fragile leaf area on the upper part of the wheat seedlings, while achieving effective coverage of the blind area around the roots of the seedlings by the water mist, the peripheral guide assembly 42 includes a butt joint 421 and an arc-shaped bend pipe 422, and the two are connected structures. The butt joint 421 is connected to the second section 53 in the bending channel 5 in a straight line, and the connection has a certain matching tolerance to facilitate sealing and smooth docking, while one end of the arc-shaped bend pipe 422 faces and contacts the side wall of the movable column 3112, thereby forming a movable path around the periphery of the wheat seedling roots. In the above structure, the "butt joint 421" is used to connect the internal bending channel 5 with the external guide path, and the "arc-shaped bend pipe 422" is used to construct a tortuous path section that fits the peripheral shape of the seedling roots. Its opening faces upward to facilitate the entry and stable operation of the spray component.

[0064] This structure is effectively connected to the bending channel 5 under the driving action of the horizontal pusher 412. Through the gradual advancement of hydraulic or other power mechanisms, the bendable tube 3221 extends from the second section 53 into the docking tube 421 and the curved bend 422. Furthermore, the atomizing nozzle 3223 provided on the bendable tube 3221 moves synchronously with the tube, while the compensating spray head 3232 is located exactly where the peripheral guide assembly 42 cannot surround the wheat seedlings. This allows multiple atomizing nozzles 3223 and the compensating spray head 3232 to be distributed circumferentially around the roots of the wheat seedlings, thereby achieving a surrounding spraying of the periphery of the roots of the wheat seedlings with water mist. Because the curved bend 422 has a certain surrounding angle, the spray head will preferentially avoid the leaves of the wheat seedlings in its internal movement path, which is beneficial to reduce unnecessary disturbance of the water mist to the upper plants and improve the efficiency of atomization compensation in the blind area below the leaves. Therefore, the structural setting of this embodiment can improve the uniformity and effectiveness of spraying without affecting the normal growth state of wheat seedlings, and to a certain extent meet the needs of precise control of root diseases and pests.

[0065] In some embodiments, combined with Figure 1 and Figure 6In order to achieve comprehensive and uniform spraying of the upper area of ​​the wheat seedlings and cooperate with the bottom spray system to form a three-dimensional spray structure for the entire wheat plant, the top atomizing mechanism 2 is arranged in the upper area of ​​the mobile frame 1. The top atomizing mechanism 2 includes a pump body 21, a spray pipe 22 and a plurality of atomizers 23. Specifically, the pump inlet end of the pump body 21 is connected to the water storage tank 11 through a connecting hose or a conduit, so as to achieve a stable supply of water; the pump outlet end of the pump body 21 is connected to the spray pipe 22. The spray pipe 22 is arranged along the direction of the wheat seedling planting row, and its length direction is parallel to the arrangement direction of the seedlings, so as to facilitate the synchronous spraying treatment of all wheat seedlings in the same row during the movement.

[0066] The spray tube 22 is equipped with multiple atomizers 23, evenly spaced along its length and spraying vertically downward. Through the continuous pressure supplied by the pump 21, the liquid in the spray tube 22 is simultaneously atomized and sprayed out from the multiple atomizers 23, forming a water mist that evenly covers the surface downward, thus achieving meticulous spraying of the upper leaves and stems of the wheat seedlings. Because the spray tube 22 aligns with the arrangement of the wheat seedlings, continuous spray coverage is achieved longitudinally during the spraying operation, avoiding blind spots.

[0067] For example, the atomizer 23 can be an ultrasonic atomizer head, a rotary nozzle, or other small spray element suitable for farmland use. The top atomizer 2 improves the adaptability of the overall spraying device to areas of varying heights and complements the bottom spray structure, thereby improving spray efficiency and coverage.

[0068] In a second aspect, the present application further provides a spraying method, which is implemented based on the wheat seedling spraying device of the first aspect, comprising the following steps:

[0069] Move the mobile frame 1 into the experimental farmland, avoid the wheat seedlings during the movement, and move on the land between two adjacent rows of wheat seedlings, so that the spray space is finally above one of the rows of wheat seedlings in the experimental farmland;

[0070] Then, the horizontal Z-direction position of the movable frame 1 is adjusted so that the multiple bottom atomizing assemblies 32 are horizontally positioned to correspond to the multiple seedlings on a row of wheat seedlings.

[0071] Then, the horizontal X-direction position of the movable frame 1 is adjusted so that the movable frame 1 moves horizontally in a directional manner and actively approaches the multiple seedlings in a row of wheat seedlings until the movable column 3112 approaches the multiple seedlings in a row of wheat seedlings and stops moving.

[0072] The moving assembly 41 is activated, causing the moving assembly 41 to drive the peripheral guide assembly 42 toward the multiple wheat seedlings in a row in the horizontal X direction until the peripheral guide assembly 42 abuts against the side wall of the moving column 3112 and stops. At this time, the peripheral guide assembly 42 and the pushing assembly 31 together circumferentially surround the roots of the wheat seedlings.

[0073] Then, the pushing assembly 31 is activated, so that the bottom atomizing assembly 32 partially enters the peripheral guide assembly 42, so that the bottom atomizing assembly 32 circumferentially surrounds the root periphery of the wheat seedling;

[0074] Finally, start the bottom atomizing component 32 and the top atomizing mechanism 2, so that the bottom atomizing component 32 sprays water mist from bottom to top toward the blind area below the wheat seedling leaves, and the top atomizing mechanism 2 sprays water mist from top to bottom toward the top of the wheat seedlings in the spray space.

[0075] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0076] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0077] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0078] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A wheat seedling spray device, characterized in that: include: A mobile frame is provided with a water storage tank on its top and a spray space is reserved at its lower end; a top atomizing mechanism is provided on the mobile frame and is connected to an upper area located below the water storage tank and within the spray space, for spraying water mist from top to bottom toward the wheat seedlings within the spray space; The bottom atomizing mechanism includes a pushing component and a bottom atomizing component. The pushing component is arranged on one side of the mobile frame. The bottom atomizing component is arranged on the pushing component and is connected to the water storage tank. The pushing component is used to drive the bottom atomizing component to move. The bottom atomizing component is used to spray water mist from bottom to top toward the bottom of the leaves of the wheat seedlings in the spray space; the moving guide mechanism includes a moving component and a peripheral guide component. The moving component is arranged on the other side of the mobile frame. The peripheral guide component is arranged on the moving component. The moving component can drive the peripheral guide component to move, and the peripheral guide component can be entered by the bottom atomizing component; the peripheral guide component includes a connecting The butt joint pipe and the arc-shaped bend pipe are both open at the upper end. After the peripheral guide component approaches the movable column under the action of the movable component, the butt joint pipe and the bending channel are straightly connected and communicated. The end of the arc-shaped bend pipe away from the butt joint pipe abuts against the side wall of the movable column, so that the bending channel, the butt joint pipe and the arc-shaped bend pipe form a complete moving path around the root periphery of the wheat seedling, and the moving path avoids the leaves of the wheat seedling. Under the action of the horizontal pusher, the compensating spray head and the atomizing nozzle can circumferentially surround the root periphery of the wheat seedling and spray water mist to the blind area below the leaves of the wheat seedling. The pushing assembly includes a vertical moving member, which includes a first cylinder and a moving column. The moving column is installed at the end of the piston rod of the first cylinder, and the length direction of the moving column is parallel to the arrangement direction of the planted wheat seedlings. The bottom atomization assembly is provided with multiple intervals between the moving column and the moving frame. The bottom atomizing assembly includes a water pumping part, a first spraying part and a second spraying part, wherein the water pumping part includes a water pump, a main pipe and an accordion hose; the first spraying part includes a bendable tube body, a movable hose and an atomizing nozzle, the movable column is provided with a bending channel with an open upper end, the bendable tube body is slidably arranged in the bending channel, the movable hose is inserted into the bendable tube body and is used to adaptively bend following the bendable tube body, a plurality of atomizing nozzles are arranged at intervals along the extension direction of the movable hose, and after passing through the bendable tube body, the atomizing nozzle is tilted upward and toward the blind area below the wheat seedling leaves, and the end of the accordion hose away from the water pump is connected to the movable hose; the pushing assembly also includes a horizontal pushing part, which is used to push the bendable tube body to move in the bending channel and the peripheral guide assembly; the second spraying part includes a compensation tube and a compensation spray head, and the compensation spray head is tilted upward and toward the blind area below the wheat seedling leaves.

2. A wheat seedling spray device according to claim 1, characterized in that: The first cylinder is installed on one side of the movable frame, and the piston rod of the first cylinder extends vertically downward.

3. A wheat seedling spray device according to claim 1, characterized in that: The water pump is installed on the top of the mobile frame, the pump inlet end of the water pump is connected to the water tank, the main pipe is connected to the pump outlet end of the water pump, the length direction of the main pipe is parallel to the length direction of the mobile column, and multiple groups of accordion hoses are connected on the main pipe.

4. A wheat seedling spray device according to claim 1, characterized in that: An embedding groove is provided on the upper surface of the moving column, a compensation pipe is embedded in the embedding groove and is connected with the accordion hose, and a compensation spray head is connected to the top of the compensation pipe.

5. A wheat seedling spray device according to claim 1, characterized in that: The bending channel includes a first section, an arc section and a second section that are connected in sequence. The extension direction of the first section is parallel to the length direction of the movable column, and the extension direction of the second section is perpendicular to the length direction of the movable column in the horizontal plane. The arc section is used to smoothly turn and connect the first section and the second section; the bendable tube body is formed by axially connecting a plurality of hollow circular tubes. Adjacent hollow circular tubes are hinged and can be relatively bent. The outer diameter of the hollow circular tube is adapted to the inner diameter of the bending channel. The movable hose is embedded in the plurality of hollow circular tubes. The upper surface of the hollow circular tube is provided with a first opening for the atomizing nozzle to vertically pass through. hole, and at the same time, a second opening for the accordion hose to pass through is also provided on the upper surface of the hollow circular tube, a positioning groove is provided on the inner wall of the bending channel along the extension direction of the bending channel, and a positioning block is provided on the outer wall of the hollow circular tube, and the positioning block slides in cooperation with the positioning groove, so that the hollow circular tube always remains in a state in which the first opening and the second opening are vertically facing upward during the movement; the peripheral guide component can be moved to a position where the second section is docked under the action of the moving component, so that the peripheral guide component and the bending channel form a complete moving path surrounding the root periphery of the wheat seedling, and the moving path can be used for the movement of the bendable tube body.

6. A wheat seedling spraying device according to claim 5, characterized in that: The horizontal pushing member includes a second cylinder and a pushing plate. The second cylinder is arranged on the side wall of the movable column, and the extension direction of the piston rod of the second cylinder is consistent with the length direction of the first section. The piston rod of the second cylinder extends into the first section. The pushing plate is arranged at the end of the piston rod of the second cylinder and is connected to the end of the hollow circular tube located at the end of the bendable tube body; when the peripheral guide assembly is connected to the second section, when the second cylinder is extended to the maximum extension length, part of the bendable tube body can be pushed into the peripheral guide assembly so that it is located at the periphery of the roots of the wheat seedlings.

7. A wheat seedling spraying device according to claim 5, characterized in that: The moving assembly includes a vertical lifting part, which includes a multi-stage cylinder and an abutment column. The multi-stage cylinder is arranged on the moving frame, and the piston rod of the multi-stage cylinder extends vertically downward. The abutment column is arranged at the end of the piston rod of the multi-stage cylinder. The abutment column and the moving column are parallel to each other. Multiple peripheral guide assemblies are arranged at intervals between the abutment columns, and one bottom atomization assembly corresponds to one peripheral guide assembly in the horizontal direction.

8. A wheat seedling spraying device according to claim 7, characterized in that: The moving assembly also includes a horizontal pusher, which includes a hydraulic rod, a guide tube, and a flexible pushing body, wherein the guide tube includes a vertical tube section, an arc tube section, and a horizontal tube section that are sequentially connected from top to bottom, the horizontal tube section is installed in the abutment column, and the length direction of the horizontal tube section is perpendicular to the length direction of the abutment column, the vertical tube section is vertically arranged and connected to the horizontal tube section through the arc tube section; the flexible pushing body includes a connecting rope and a plurality of rolling balls, the rolling balls are radially penetrated with a through-hole for the connecting rope to pass through, the plurality of rolling balls are passed through the through-holes on the connecting rope, the inner diameter of the guide tube is adapted to the outer diameter of the rolling balls, so that the plurality of rolling balls can be moved from a vertical arrangement state to a horizontal arrangement state in the guide tube, and the two rolling balls at the very end are fixed to the connecting rope Connection; the hydraulic rod is arranged on the movable frame, and the piston rod of the hydraulic rod enters the vertical pipe section vertically downward, and the end of the hydraulic rod is provided with an abutment plate, which is connected to the rolling ball at the top; a horizontal telescopic part is provided between the peripheral guide assembly and the abutment column, and the horizontal telescopic part includes a horizontal telescopic tube and a spring. A telescopic channel is formed in the horizontal telescopic tube, and the telescopic channel is coaxially connected with the horizontal pipe section. The peripheral guide assembly is arranged at the end of the horizontal telescopic tube away from the abutment column; wherein, after the piston rod of the hydraulic rod is extended, the flexible pushing body enters the telescopic channel under the pushing action of the hydraulic rod and pushes the horizontal telescopic tube to extend, thereby driving the peripheral guide assembly to move horizontally and approach the moving column, and the spring is provided between the peripheral guide assembly and the abutment, and the spring always has a tendency to shorten the horizontal telescopic tube.

9. A wheat seedling spraying device according to any one of claims 1 to 8, characterized in that: The top atomization mechanism includes a pump body, a spray pipe and an atomizer. The pump inlet end of the pump body is connected to the water tank. The spray pipe is connected to the pump outlet end of the pump body, and the length direction of the spray pipe is parallel to the arrangement direction of the wheat seedlings below the spray space. Multiple atomizers are connected in the length direction of the spray pipe, and the atomizers are all vertically downward.

10. A spraying method, characterized in that: The wheat seedling spraying device according to any one of claims 5 to 9 is implemented, characterized in that it includes the following steps: moving the mobile frame into the experimental farmland, allowing the mobile frame to avoid the wheat seedlings during movement and move on the land between two adjacent rows of wheat seedlings, so that the spray space is finally above one of the rows of wheat seedlings in the experimental farmland; then adjusting the horizontal Z-direction position of the mobile frame so that the multiple bottom atomizing components correspond to the multiple seedlings on a row of wheat seedlings in the horizontal position; then adjusting the horizontal X-direction position of the mobile frame so that the mobile frame moves horizontally in a directional manner and actively approaches the multiple seedlings on a row of wheat seedlings until the mobile frame approaches the multiple seedlings on the row of wheat seedlings. Stop moving; start the moving component, so that the moving component drives the peripheral guide component to approach multiple seedlings on a row of wheat seedlings in the horizontal X direction until the peripheral guide component abuts against the side wall of the moving column and stops. At this time, the peripheral guide component and the pushing component circumferentially surround the root periphery of the wheat seedling; then start the pushing component, so that the bottom atomizing component partially enters the peripheral guide component, so that the bottom atomizing component circumferentially surrounds the root periphery of the wheat seedling; finally, start the bottom atomizing component and the top atomizing mechanism, so that the bottom atomizing component sprays water mist from bottom to top toward the blind area below the leaves of the wheat seedlings, and the top atomizing mechanism sprays water mist from top to bottom toward the top of the wheat seedlings in the spray space.

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