A precision fertilization device

Abstract

This invention discloses a precision fertilization device, belonging to the technical field of agricultural seedling equipment. The device includes a walking mechanism, a spraying component, and a loosening component. The walking mechanism spans across the seedling tray and can move along the length of the tray. The spraying component is mounted on the walking mechanism via a first support component, and the loosening component is mounted on the walking mechanism via a second support component and located in front of the spraying component. The loosening component includes a pipe, multiple loosening elements mounted on the pipe, and auxiliary wheels mounted at both ends of the pipe. The auxiliary wheels are placed on a second support platform. When the walking mechanism moves forward, the auxiliary wheels roll on the second support platform, driving the pipe to rotate. The loosening elements loosen the substrate in the seedling tray as the pipe rotates, and the spraying component follows closely behind, spraying fertilizer solution onto the loosened substrate. This invention can simultaneously loosen the substrate during spray fertilization, and the loosening component does not require an additional power unit. It has a simple structure, low cost, and is suitable for seed and seedling cultivation scenarios.

Description

Technical Field

[0001] This invention relates to the field of agricultural seedling equipment technology, specifically to a precision fertilization device for seed and seedling cultivation. Background Technology

[0002] In the process of seed and seedling cultivation, the water and fertilizer management of the seedling substrate is a crucial factor in determining the quality of the seedlings. The seedling substrate in the seedling tray (or seedling plug tray) needs to be replenished with water and nutrients regularly to ensure the normal growth and development of the seedlings. Existing sprinkler systems typically use a walking mechanism to move the sprinkler components back and forth above the seedling tray to achieve uniform fertilization and spraying of the seedling tray.

[0003] However, during long-term spraying operations in seedling cultivation, the surface of the seedling substrate easily hardens, forming a hard crust. This significantly reduces the substrate's permeability, severely impacting the respiration and nutrient absorption efficiency of the seedling roots, thus hindering the robust growth of the seedlings. To address this issue, some fertilization devices have attempted to integrate soil loosening functions, but their soil loosening and spraying mechanisms often operate independently. The soil loosening mechanism requires an additional independent drive motor or a complex transmission system connected to the walking mechanism. This not only increases equipment cost and structural complexity but also raises energy consumption and maintenance difficulty, making it difficult to achieve low-cost, high-efficiency widespread application in seedling cultivation scenarios.

[0004] The present invention aims to provide a precision fertilization device to solve the above-mentioned problems. Summary of the Invention

[0005] This invention addresses the aforementioned shortcomings of existing fertilization spraying devices in seed and seedling cultivation by providing a precision fertilization device. The aim is to solve the technical problems of existing devices being unable to simultaneously loosen the seedling substrate during spraying fertilization, and the loosening mechanism requiring an additional independent power source, resulting in complex structures and high costs.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A precision fertilization device includes a spraying assembly and a loosening assembly located in front of the spraying assembly.

[0007] The spraying assembly is mounted on the walking mechanism by means of the first support assembly and is used to spray and fertilize the seedlings in the seedling tray. The walking mechanism is placed on the first support platform on both sides of the seedling tray and can move along the length of the seedling tray.

[0008] The loosening component is mounted on the walking mechanism by means of a second support component. Auxiliary wheels are also installed at both ends of the loosening component. A second support platform that cooperates with the auxiliary wheels is installed on the support platform. The auxiliary wheels can roll on the second support platform and drive the loosening component to rotate so that the loosening component loosens the substrate on the surface of the seedling tray.

[0009] In a preferred embodiment of the present invention, the spraying assembly includes a spray pipe and a plurality of atomizing nozzles mounted on the spray pipe. A water inlet pipe is installed in the middle of the spray pipe, and both ends of the spray pipe are respectively mounted on two of the first support assemblies. The plurality of atomizing nozzles are equidistantly arranged along the length of the spray pipe. This arrangement ensures that the liquid fertilizer is evenly covered in the width direction of the seedling tray, avoiding fertilization blind spots or localized over-fertilization.

[0010] In a preferred embodiment of the present invention, the first support assembly includes a base and a mounting base. The base has a hollow structure and is mounted on the traveling mechanism, while the mounting base is mounted on the upper end of the base. The spray pipe passes through the mounting base and is connected and fixed to the mounting base by screws on the top of the mounting base. The hollow structure of the base ensures support strength while effectively reducing the overall weight of the device and lowering the driving load on the traveling mechanism. The spray pipe is connected and fixed to the mounting base by screws, facilitating disassembly, maintenance, and replacement.

[0011] In a preferred embodiment of the present invention, the walking mechanism includes a movable base and at least two walking wheels, which are rotatably connected to the outside of the movable base by means of bearings. The walking wheels are arranged along the length of the movable base. The number of walking wheels can be adjusted according to the length of the seedling tray and the load requirements of the device, and at least two walking wheels ensure the stability of the walking mechanism during movement.

[0012] In a preferred embodiment of the present invention, the loosening component includes a pipe and a plurality of loosening elements detachably mounted on the pipe, wherein the plurality of loosening elements are arranged along the length of the pipe. The loosening elements are located between two adjacent seedling holes. Placing the loosening elements on the substrate between adjacent seedling holes can effectively loosen the compacted substrate surface while avoiding direct contact between the loosening elements and the seedlings, thereby achieving the loosening function while protecting the seedlings from damage.

[0013] In a preferred embodiment of the present invention, the loosening component includes a sleeve and bristles mounted on the sleeve. The sleeve is mounted to the pipe fitting by bolts. The bristles are fixed to the outer periphery of the sleeve and are arranged in two sets, with the two sets of bristles located on opposite sides of the bolts. The bristles are arranged symmetrically in two sets, so that when the pipe fitting rotates, the two sets of bristles alternately contact the substrate, making the loosening effect more uniform and continuous. It also facilitates the adjustment of the circumferential position of the loosening component on the pipe fitting by bolts.

[0014] In a preferred embodiment of the present invention, the auxiliary wheels are mounted on both ends of the pipe fitting and rotate synchronously with the pipe fitting. Both ends of the pipe fitting are also rotatably connected to the second support assembly via bearings. The auxiliary wheels are fixedly connected to the pipe fitting. When the traveling mechanism drives the entire device forward, the auxiliary wheels roll on the second support platform, and their rotational motion directly drives the pipe fitting to rotate synchronously, thereby driving the loosening component to rotate and complete the loosening operation. This transmission method requires no additional power source; it relies solely on the rolling friction during the device's movement to drive the loosening component. It features a simple structure, low cost, and high reliability.

[0015] In a preferred embodiment of the present invention, the pipe fitting is further provided with movable holes, which are arranged along the length of the pipe fitting. After unlocking, the loosening component can be adjusted in position along the length of the pipe fitting using the movable holes. Since the spacing between the holes in seedling trays of different specifications may vary, the movable hole design allows operators to flexibly adjust the installation position of each loosening component on the pipe fitting according to the actual hole spacing of the seedling tray, ensuring that the loosening component is always aligned with the substrate area between adjacent seedling holes, thus improving the versatility and adaptability of the device.

[0016] In a preferred embodiment of the present invention, the second support assembly includes a first support base and a second support base. The first support base is a rectangular tubular structure and is fixedly mounted on the traveling mechanism. The second support base is L-shaped and connected to the tubular component. The first rectangular tubular support base has good structural strength and is easy to process. The second L-shaped support base cooperates with the bearing at the end of the tubular component, which not only realizes the rotational support of the tubular component but also ensures a reliable connection between the tubular component and the traveling mechanism.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention integrates a loosening component located in front of the spraying component on the walking mechanism. During the process of the walking mechanism driving the spraying component to move forward and apply fertilizer, the loosening component simultaneously completes the loosening operation of the substrate in the seedling tray, which effectively solves the problem of substrate compaction caused by long-term spraying, improves the growth environment of seedling roots, and promotes the robust development of seedlings.

[0018] (2) The loosening component of the present invention is driven by the rolling cooperation between the auxiliary wheel and the second support platform. The auxiliary wheel is passively rolled and directly drives the pipe to rotate when the walking mechanism moves forward. There is no need to configure any power device separately for the loosening component, which solves the technical problems of complex structure and high cost of existing devices, reduces manufacturing cost and energy consumption, and facilitates its use in seedling cultivation sites. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1Detailed view of part A in the middle; Figure 3 for Figure 1 Detailed view of section B in the middle; Figure 4 This is a schematic diagram of the conveying component in this invention; Figure 5 for Figure 4 Top view; Figure 6 This is a schematic diagram of the structure of the porous component in this invention; Explanation of markings in the diagram: 1-Walking mechanism; 11-Moving seat; 12-Walking wheels; 2-Spray assembly; 21-Spray pipe; 22-Atomizing nozzle; 23-Water inlet pipe; 3-Loosening component; 31-Pipe fitting; 311-Moving hole; 32-Loosening part; 321-Pipe sleeve; 322-Brush bristles; 323-Bolt; 33-Auxiliary wheel; 4-First support assembly; 41-Base; 42-Mounting bracket; 43-Screw; 44-Connecting rod; 5-Second support component; 51-Support base one; 52-Support base two; 6-First support platform; 7-Second support platform; 8-Seedling tray; 81-Seedling hole. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that in the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Technical concept of the invention: Addressing the technical deficiencies of existing fertilization spraying devices for seed and seedling cultivation, this invention proposes a novel design concept: The loosening component 3 is integrated into the walking mechanism 1 and positioned in front of the spraying component 2. Through the rolling interaction between the auxiliary wheel 33 and the second support platform 7 as the walking mechanism 1 moves forward, the linear motion of the walking mechanism 1 is converted into the rotational motion of the loosening component 3. This achieves coordinated operation between the loosening component 3 and the spraying component 2. Specifically, as the walking mechanism 1 moves forward, the spraying component 2 sprays liquid fertilizer onto the seedling tray 8, while the loosening component 3 simultaneously loosens the substrate in the seedling tray 8. The key to this concept lies in "walking as driving"—the power of the loosening component 3 comes entirely from the walking motion of the walking mechanism 1 itself, requiring no additional power unit, truly realizing the integration, synchronization, and passive operation of spraying and loosening.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, the precision fertilization device provided by the present invention mainly includes a walking mechanism 1, a spraying component 2, a loosening component 3, a first support component 4, and a second support component 5.

[0024] The walking mechanism 1 spans across the top of the seedling tray 8, and its two walking wheels 12 are respectively placed on the first support platform 6 on both sides of the seedling tray 8. The walking mechanism 1 can move back and forth along the first support platform 6 under the drive of an external drive device.

[0025] The spray assembly 2 is mounted on the movable seat 11 of the walking mechanism 1 via two first support components 4. The spray assembly 2 includes a spray pipe 21 and a plurality of atomizing nozzles 22 mounted on the spray pipe 21 for spraying liquid fertilizer onto the seedling tray 8 during walking.

[0026] The loosening component 3 is mounted on the movable seat 11 of the traveling mechanism 1 via two second support components 5, and the loosening component 3 is located in front of the spraying component 2 (with reference to the forward direction of the traveling mechanism). The loosening component 3 includes a pipe 31, a plurality of loosening elements 32 mounted on the pipe 31, and auxiliary wheels 33 mounted at both ends of the pipe 31. The auxiliary wheels 33 are placed on a second support platform 7, which is laid on the outside of the first support platform 6.

[0027] As the walking mechanism 1 moves forward, the auxiliary wheel 33 rolls on the second support platform 7, causing the pipe 31 to rotate. The loosening component 32 on the pipe 31 rotates accordingly, loosening the substrate in the seedling tray 8. The spraying component 2 follows closely behind the loosening component 3, spraying fertilizer solution onto the loosened substrate.

[0028] The specific structure of each component is described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 , Figure 2 As shown, the walking mechanism 1 includes a movable seat 11 and walking wheels 12.

[0030] The movable base 11 is constructed using welded metal sheets or a frame structure, and is elongated in shape, with its length aligned with that of the seedling tray 8. The movable base 11 is made of lightweight aluminum alloy or galvanized steel, minimizing weight while ensuring sufficient structural strength. The movable base 11 has bearing mounting holes for installing bearings.

[0031] The traveling wheels 12 are mounted on the outer side of the movable base 11. Each traveling wheel 12 is rotatably connected to the movable base 11 via a rolling bearing, allowing the traveling wheel 12 to rotate freely relative to the movable base 11. There are at least two traveling wheels 12, respectively located at both ends of the movable base 11. For scenarios with longer seedling trays 8, auxiliary traveling wheels can also be added in the middle of the movable base 11 to improve stability. The outer edge of the traveling wheels 12 is provided with anti-slip texture to ensure that the traveling wheels 12 do not slip when moving on the first support platform 6.

[0032] The wheels 12 are placed on the first support platforms 6 on both sides of the seedling tray 8. The first support platform 6 is a guide rail or platform laid along the length of the seedling tray 8. Its surface is flat and smooth, which can provide a stable walking plane for the wheels 12.

[0033] The walking mechanism 1 is also equipped with a drive device (not shown in the figure), which can be driven by a motor. In highly automated seedling nurseries, a stepper motor with a reducer is usually used to drive the walking wheel 12 to rotate, so as to achieve uniform and controllable movement of the walking mechanism 1. The drive device is mounted on the moving base 11, and its output end is connected to the walking wheel 12 for transmission. When the drive device is started, the walking wheel 12 rolls on the first support platform 6, driving the entire walking mechanism 1 and the spray assembly 2 and loosening assembly 3 mounted on it to move forward or backward along the length of the seedling tray 8.

[0034] like Figure 1 As shown, the spraying assembly 2 is installed on the walking mechanism 1 and is used to spray liquid fertilizer onto the seedling tray 8 during the forward movement of the walking mechanism 1.

[0035] The spray assembly 2 mainly includes a spray pipe 21, an atomizing nozzle 22, and a water inlet pipe 23. The spray pipe 21 is a hollow pipe made of stainless steel or engineering plastic, and its length direction is perpendicular to the length direction of the traveling mechanism 1, that is, consistent with the width direction of the seedling tray 8. The diameter of the spray pipe 21 is determined according to the actual flow rate requirement, and a pipe with an outer diameter of 20mm to 50mm can be selected.

[0036] Both ends of the spray pipe 21 are mounted on the movable seat 11 of the traveling mechanism 1 via the first support assembly 4. A water inlet pipe 23 is connected to the middle of the spray pipe 21. One end of the water inlet pipe 23 communicates with the inner cavity of the spray pipe 21, and the other end is connected to the fertilizer supply system via a flexible hose. The fertilizer supply system includes a fertilizer storage tank, a mixing device, and a delivery pump. The operator adds solid or liquid fertilizer and water to the fertilizer storage tank in a certain proportion. After thorough mixing by the mixing device, liquid fertilizer is formed and then pumped into the spray pipe 21 through the flexible hose and the water inlet pipe 23.

[0037] Multiple atomizing nozzles 22 are evenly installed along the length of the spray pipe 21. The atomizing nozzles 22 are standardized agricultural atomizing nozzles, with a spray angle typically ranging from 80° to 120°. The number of atomizing nozzles 22 is determined based on the width of the seedling tray 8 and the effective spray width of a single nozzle, ensuring appropriate overlap between the spray areas of adjacent nozzles and achieving comprehensive coverage of the seedling tray 8 across its width. The atomizing nozzles 22 are installed at pre-set mounting interfaces on the spray pipe 21 via threaded connections, facilitating disassembly, cleaning, and replacement. When liquid fertilizer enters the spray pipe 21 under the pressure of the delivery pump, it is atomized by the atomizing nozzles 22 and sprayed out, forming a fine fertilizer mist that evenly settles onto the substrate surface and seedling leaves of the seedling tray 8.

[0038] like Figure 1 As shown, the first support component 4 includes a base 41 and a mounting base 42.

[0039] The base 41 is a hollow structure made of bent and welded metal sheet, and its bottom is fixed to the upper surface of the movable base 11 by bolts or welding.

[0040] Mounting base 42 is fixed to the upper end of base 41, and has a through hole for spray pipe 21 to pass through. After spray pipe 21 passes through the through hole, it is fixedly connected to mounting base 42 by locking screw 43 provided on the top of mounting base 42. After loosening locking screw 43, it can be removed from mounting base 42 for cleaning and replacement. Connecting rods 44 for improving the stability of first support assembly 4 are also connected between mounting bases 42, and there are at least two connecting rods 44.

[0041] The loosening component 3 is a key part of the present invention. The loosening component 3 is installed on the walking mechanism 1 and located in front of the spraying component 2 (with reference to the forward direction of the walking mechanism 1).

[0042] The loosening component 3 mainly includes a pipe 31, a loosening element 32, and an auxiliary wheel 33. The pipe 31 is a hollow round tube made of stainless steel or aluminum alloy, and its length direction is parallel to the length direction of the traveling mechanism 1, that is, consistent with the length direction of the seedling tray 8. The diameter of the pipe 31 is usually 25mm to 40mm, and the wall thickness is 2mm to 3mm to ensure sufficient torsional rigidity during rotation.

[0043] Both ends of the pipe fitting 31 are mounted on the traveling mechanism 1 via the second support assembly 5. The ends of the pipe fitting 31 are rotatably connected to the second support assembly 5 via rolling bearings, allowing the pipe fitting 31 to rotate freely around its own axis.

[0044] like Figure 5 , Figure 6 As shown, a plurality of loosening elements 32 are installed on the pipe fitting 31 along its length. The number of loosening elements 32 matches the number of rows of seedling holes 81 on the seedling tray 8—specifically, the number of loosening elements 32 is equal to the number of rows of seedling holes 81 on the seedling tray 8 minus one, that is, each loosening element 32 corresponds to the substrate area between two adjacent rows of seedling holes 81.

[0045] like Figure 6 As shown, the loosening component 32 includes a sleeve 321 and bristles 322. The sleeve 321 is an annular sleeve that matches the outer diameter of the fitting 31, with its inner diameter slightly larger than the outer diameter of the fitting 31, so that the sleeve 321 can be fitted onto the fitting 31 and slide along it. The material is a plastic with a certain degree of elasticity. A through hole is provided on the sleeve 321. After the bolt 323 passes through the through hole and is tightened, the sleeve 321 undergoes a slight elastic deformation, thereby pressing against the outer wall of the fitting 31 and achieving a fixed connection between the sleeve 321 and the fitting 31.

[0046] The bristles 322 are fixed to the outer periphery of the sleeve 321. The bristles 322 are made of soft nylon or silicone material, and their diameter is 0.3 mm to 0.8 mm. Two sets of bristles 322 are arranged on the outer periphery of the sleeve 321, located on either side of the bolt 323 mounting position on the sleeve 321, i.e., symmetrically or approximately symmetrically arranged along the length of the sleeve 321. When the sleeve 31 rotates, the two sets of bristles 322 alternately contact the substrate surface, achieving continuous loosening of the substrate. The ends of the bristles 322 are preferably rounded to further reduce excessive disturbance to the substrate and the potential risk of damage to seedlings.

[0047] The fitting 31 also has a movable hole 311. The movable hole 311 is arranged along the length of the fitting 31 and is a long, narrow groove. When it is necessary to adjust the position of the loosening component 32, the operator first loosens the bolt 323 on the sleeve 321 to release the locking between the sleeve 321 and the fitting 31, then slides the sleeve 321 along the length of the fitting 31 to the target position, and finally retightens the bolt 323 to fix the sleeve 321 to the fitting 31. The design of the movable hole 311 allows the installation position of the loosening component 32 on the fitting 31 to be flexibly adjusted according to the actual hole spacing of the seedling tray 8, thereby adapting to seedling trays 8 of different specifications.

[0048] Auxiliary wheels 33 are installed at both ends of pipe fitting 31 and fixedly connected to pipe fitting 31. Auxiliary wheels 33 are disc-shaped components with a diameter larger than that of pipe fitting 31. The rim of auxiliary wheels 33 is provided with anti-slip textures or rubber rings to increase friction with the second support platform 7, ensuring that auxiliary wheels 33 can reliably drive pipe fitting 31 to rotate when rolling. Auxiliary wheels 33 and pipe fitting 31 are circumferentially fixed by a key connection or set screws to ensure synchronous rotation.

[0049] The second support platform 7 is laid outside the first support platform 6 or is arranged parallel to the first support platform 6. The height of the upper surface of the second support platform 7 matches the position of the auxiliary wheel 33, so that when the traveling wheel 12 is placed on the first support platform 6, the auxiliary wheel 33 falls exactly on and contacts the upper surface of the second support platform 7. The upper surface of the second support platform 7 is a flat rolling plane, and the auxiliary wheel 33 rolls on the second support platform 7 when the traveling mechanism 1 moves forward.

[0050] The second support component 5 includes support base one 51 and support base two 52.

[0051] The support base 51 is a rectangular tubular structure made of metal square tubing, and its bottom is fixed to the movable base 11 of the traveling mechanism 1 by bolts or welding.

[0052] Support base 2 52 is L-shaped, with one end fixed to the upper end of support base 1 51 and the other end extending towards the seedling tray 8. The end of the tube 31 is rotatably connected to the extended end of support base 2 52 via a rolling bearing. The bearing is a mounted ball bearing for easy installation and maintenance.

[0053] like Figure 1 , Figure 3As shown, the loosening component 3 is located in front of the spraying component 2, that is, along the forward direction of the traveling mechanism 1, the loosening component 3 passes the same position on the seedling tray 8 before the spraying component 2. This positional design is based on the following considerations: the loosening component 3 first loosens and breaks up the compacted substrate surface, making the substrate surface soft and forming fine cracks, after which the spraying component 2 sprays liquid fertilizer onto the loosened substrate. Because the substrate surface has been loosened, the fertilizer solution is more likely to penetrate into the substrate interior, rather than remaining on the surface and causing runoff or evaporation loss, thereby improving fertilizer utilization efficiency. Simultaneously, the slight disturbance of the substrate by the bristles 322 during the loosening process also helps to break the surface water film, promoting uniform infiltration of the fertilizer solution.

[0054] The front-to-back distance between the loosening component 3 and the spraying component 2 should be determined according to the actual working conditions, usually between 100mm and 300mm. If the distance is too small, the fertilizer mist generated by the spraying may contaminate the loosening component 3, affecting the working condition of the bristles 322; if the distance is too large, it will increase the overall length of the device, which is not conducive to operation in a seedling nursery with limited space.

[0055] The following combination Figures 1 to 6 The working process of this invention will be described.

[0056] First, the walking mechanism 1 is positioned across the seedling tray 8, with the walking wheels 12 placed on the first support platform 6 and the auxiliary wheels 33 placed on the second support platform 7. The water inlet pipe 23 on the spray pipe 21 is connected, and the fertilizer supply system's delivery pump is started, sending the mixed liquid fertilizer into the spray pipe 21 through the water inlet pipe 23. Under pressure, the liquid fertilizer is sprayed from each atomizing nozzle 22, forming a fine fertilizer mist.

[0057] The drive unit of the walking mechanism 1 is activated, and the walking wheels 12 roll on the first support platform 6, driving the walking mechanism 1 and the spraying assembly 2 and loosening assembly 3 installed on it to move forward at a constant speed along the length of the seedling tray 8. As the walking mechanism 1 moves forward, fertilizer mist is continuously sprayed onto the substrate surface and seedlings of the seedling tray 8, realizing spray fertilization.

[0058] Simultaneously, the loosening component 3, located in front of the spraying component 2, is activated. Specifically, the auxiliary wheel 33 rolls on the second support platform 7 as the traveling mechanism 1 moves forward. The rotation of the auxiliary wheel 33 directly drives the pipe 31 to rotate around its own axis, and the loosening component 32 installed on the pipe 31 rotates synchronously. During the rotation, the bristles 322 on the loosening component 32 repeatedly sweep across the substrate surface between adjacent seedling holes 81, breaking up and loosening the substrate surface that has hardened due to long-term spraying, restoring the substrate to a loose and breathable state.

[0059] After the loosening operation is completed, the spraying component 2 then sprays the fertilizer solution onto the loosened substrate. The fertilizer solution quickly seeps into the substrate through the tiny cracks created by loosening, allowing the seedling roots to absorb and utilize it.

[0060] When the walking mechanism 1 reaches the end of the seedling tray 8, the driving device can reverse the operation to make the walking mechanism 1 return along the original path. During the return process, the spraying component 2 and the loosening component 3 also perform spraying and loosening operations, realizing the reciprocating management of the seedling tray 8.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0062] For example, in one variant, the bristles 322 on the loosening member 32 can be segmented using materials of different hardness—a harder material is used at the base of the bristles 322 to provide sufficient loosening force, while a softer material is used at the ends of the bristles 322 to protect the seedlings. In another variant, the pipe 31 can have a segmented structure, with each segment connected by a coupling, allowing for flexible adjustment of the total length of the pipe 31 according to the actual width of the seedling tray 8. In yet another variant, the second support platform 7 can be provided with a guide groove that matches the rim of the auxiliary wheel 33 to prevent the auxiliary wheel 33 from shifting laterally during rolling, further improving the stability of the device operation.

[0063] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A precision fertilization device, characterized in that, Includes the spray assembly and the loosening assembly located in front of the spray assembly; The spraying assembly is mounted on the walking mechanism by means of the first support assembly and is used to spray and fertilize the seedlings in the seedling tray. The walking mechanism is placed on the first support platform on both sides of the seedling tray and can move along the length of the seedling tray. The loosening component is mounted on the walking mechanism by means of a second support component. Auxiliary wheels are also installed at both ends of the loosening component. A second support platform that cooperates with the auxiliary wheels is installed on the support platform. The auxiliary wheels can roll on the second support platform and drive the loosening component to rotate so that the loosening component is aligned with the substrate on the surface of the seedling tray.

2. The precision fertilization device according to claim 1, characterized in that, The spray assembly includes a spray pipe and multiple atomizing nozzles installed on the spray pipe; A water inlet pipe is installed in the middle of the spray pipe, and the two ends of the spray pipe are respectively installed on the two first support components. The multiple atomizing nozzles are equidistantly arranged along the length of the spray pipe.

3. The precision fertilization device according to claim 2, characterized in that, The first support component includes a base and a mounting base. The base has a hollow structure and is mounted on the walking mechanism. The mounting base is mounted on the upper end of the base. The spray pipe passes through the mounting base and is connected and fixed to the mounting base by means of screws on the top of the mounting base.

4. The precision fertilization device according to any one of claims 1 to 3, characterized in that, The walking mechanism includes a movable base and at least two walking wheels, which are rotatably connected to the outside of the movable base by means of bearings; The wheels are arranged along the length of the movable seat.

5. The precision fertilization device according to claim 1, characterized in that, The loosening assembly includes a pipe fitting and a plurality of loosening components detachably mounted on the pipe fitting, wherein the plurality of loosening components are arranged along the length of the pipe fitting. The loosening element is located between two adjacent seedling holes.

6. The precision fertilization device according to claim 5, characterized in that, The loosening component includes a sleeve and bristles mounted on the sleeve. The sleeve is mounted to the pipe by means of bolts. The bristles are fixed to the outer periphery of the sleeve and are provided in two sets, with the two sets of bristles located on both sides of the bolts respectively.

7. The precision fertilization device according to claim 6, characterized in that, The auxiliary wheels are installed at both ends of the pipe fitting and rotate synchronously with the pipe fitting; The two ends of the pipe are also rotatably connected to the second support assembly by means of bearings.

8. The precision fertilization device according to claim 5, characterized in that, The pipe fitting is also provided with a movable hole, which is arranged along the length of the pipe fitting. After unlocking, the loosened component can be adjusted in position along the length of the pipe using the movable hole.

9. A precision fertilization device according to claim 6, characterized in that, The second support component includes a support base one and a support base two. The support base one is a rectangular tubular structure and is installed and fixed on the walking mechanism. The support base two is "L" shaped and connected to the tubular component.

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