Green tea seedling cultivation device

Abstract

The application discloses a green tea seedling cultivation device and relates to the technical field of agricultural planting devices.The device base is used as the supporting main body of the cultivation device, the inside of a cultivation pot is provided with nutrient soil for cultivating green tea seedlings, and the cultivation pot is embedded with a flexible piezoresistance sensor; a pressure platform pot is placed on a platform pot groove, the cultivation pot is placed in the pressure platform pot, and the pressure platform pot is used for applying external pressure to the cultivation pot and providing mechanical stimulation for the root system of the green tea seedlings; a spraying assembly is installed on the device base and is used for spraying and irrigation during the cultivation of the green tea seedlings; and a spraying drive is used for driving the spraying assembly to move and adjusting the angle of the spraying assembly for spraying and irrigation of the green tea seedlings; the cultivation pot is applied with controllable mechanical stimulation by the pressure platform pot to promote the lignification and development of the root system, the spraying assembly with the adjustable angle is combined to realize differential spraying and irrigation of the front and back surfaces of the leaves, and the survival rate of the seedlings after transplanting is effectively improved and the water use efficiency is optimized.

Description

Technical Field

[0001] This invention relates to the field of agricultural planting equipment technology, specifically to a green tea seedling cultivation device. Background Technology

[0002] As one of China's major tea categories, the quality of green tea is closely related to its seedling cultivation process. Traditional tea tree propagation utilizes greenhouse cultivation, but this method has significant technical shortcomings. Existing spraying systems generally employ a uniform top spraying pattern, failing to fully consider the unique physiological characteristics of tea leaves. Studies have shown that the stomatal density on the underside of tea leaves is significantly higher than on the upper side, but existing equipment fails to differentiate irrigation based on this characteristic, resulting in insufficient water supply to the underside of the leaves. This unreasonable irrigation method triggers a series of chain reactions: firstly, it reduces the leaf transpiration rate, leading to stomatal closure and directly affecting carbon dioxide absorption efficiency; secondly, it hinders the transport of secondary metabolites such as theanine, ultimately affecting the normal growth and development of seedlings.

[0003] In root cultivation, existing technologies present more prominent problems. The survival rate of transplanted seedlings largely depends on root development, but current cultivation equipment generally lacks mechanical stimulation capabilities. Roots encounter soil resistance during natural growth, and this mechanical stimulation promotes root development. However, existing cultivation equipment only focuses on controlling environmental parameters such as temperature and humidity, completely neglecting the crucial role of mechanical stimulation in root development. This results in seedlings with fragile roots, insufficient lignification, and difficulty in guaranteeing survival rates after transplanting. Summary of the Invention

[0004] The purpose of this invention is to provide a green tea seedling cultivation device that solves the technical problem that traditional irrigation systems use a uniform spraying mode from above, which does not take into account the difference in stomatal density between the front and back of tea leaves, resulting in insufficient water supply to the back of the leaves and affecting transpiration and photosynthetic efficiency.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A green tea seedling cultivation device, comprising:

[0007] The equipment base, which serves as the supporting body for the cultivation equipment, includes a base support frame, on which several pot racks are provided, and on which multiple pot troughs are evenly arranged;

[0008] The cultivation pot contains nutrient soil for cultivating green tea seedlings, and a flexible piezoresistive sensor is embedded in the cultivation pot to monitor the root stress of the green tea seedlings in real time.

[0009] A pressure basin is placed on a basin trough, and the cultivation pot is placed inside the pressure basin. The pressure basin is used to apply external pressure to the cultivation pot to provide mechanical stimulation to the root system of green tea seedlings.

[0010] The spraying assembly, mounted on the equipment base, is used for spraying and irrigating green tea seedlings during cultivation.

[0011] The spray drive is used to move the spray assembly and adjust the angle at which the spray assembly sprays the green tea.

[0012] Preferably, the number of basin racks on the base support is an odd number n, the number of spraying components is (n+1) / 2, and spraying components are provided above the two sets of basin racks near the edge, and a set of spraying components is provided above the basin rack in the middle every other set of basin racks. The spraying components are arranged at intervals, which can reduce the number of irrigation equipment while fully covering the irrigation of green tea seedlings.

[0013] Preferably, a base plate is fixedly provided on one side of the base support, and a limiting arc groove is provided on the base plate to guide the movement of the spraying component.

[0014] Preferably, the pressure basin includes:

[0015] The basin is an inverted frustum-shaped cylindrical structure with an open top, and its inner wall is provided with multiple basin side grooves arranged in a ring array.

[0016] The bottom pressure ring is installed on the inner bottom of the mounting basin, and the direction and magnitude of the magnetic poles are controlled by energizing it;

[0017] The extrusion slider is slidably disposed in the side groove of the basin, and its sliding position in the side groove of the basin is controlled by cooperating with the bottom pressure ring.

[0018] The arc-shaped pressure block, which is fixedly installed on the inside of the extrusion slider, is used to extrude mechanical stimulation to the green tea roots by pressing the outer wall of the cultivation pot.

[0019] The upper part of the side groove of the basin is provided with a side groove slope, and the upper part of the extrusion slider is provided with a slider slope that cooperates with the side groove slope. The extrusion slider is driven to slide upward by the repulsive force between the bottom pressure ring and the extrusion slider. The wedge drive drives the extrusion slider to slide towards the inside of the installation basin, thereby driving the arc-shaped pressure block to move towards the cultivation basin to compress the green tea roots. The magnitude of the extrusion force is controlled by controlling the magnitude of the magnetic force.

[0020] Preferably, the extrusion linkage mechanism includes:

[0021] A linkage fixing plate is fixedly installed on the base plate, and a linkage sliding rod is slidably connected through it. The upper end of the linkage sliding rod is fixedly connected to a linkage pressure plate that moves in contact with the spraying component.

[0022] The return spring is sleeved on the outer circumference of the linkage slide rod and is used to spring back and reset the linkage pressure plate.

[0023] The linkage gear is rotatably mounted on the base plate;

[0024] The drive rack is fixedly connected to the lower end of the linkage slide rod and meshes with the linkage gear;

[0025] A rack and pinion guide is fixedly mounted on the base plate, and a transmission rack is slidably connected to it. The transmission rack meshes with the linkage gear and is distributed in a 180° circular array with the drive rack.

[0026] A lifting bracket is fixedly installed on the lower part of the transmission rack. The lifting bracket is provided with a number of lifting links corresponding to the position and number of pressure basins. The lifting links are used to drive the bottom pressure ring to move up and down.

[0027] Preferably, the cultivation pot includes a rigid pot bottom, the outer periphery of which is covered with a flexible pot rim for holding nutrient soil, and a limiting component is provided at the bottom of the rigid pot bottom for fixing the cultivation pot on a pressure vessel. The bottom of the pressure vessel is provided with a basin bottom groove that cooperates with the limiting component.

[0028] Preferably, the limiting component includes:

[0029] The connecting sleeve is fixedly installed at the bottom center of the rigid basin bottom;

[0030] A sleeve slide plate is slidably disposed inside the connecting sleeve. A sleeve slide rod is fixedly disposed on the side of the sleeve slide plate away from the hard basin bottom. The sleeve slide rod slidably passes through the bottom of the connecting sleeve.

[0031] The limiting block is fixedly connected to the side of the sleeve slide rod away from the sleeve slide plate. By rotating the limiting block, a cross limiting structure is formed with the bottom groove of the basin to limit and fix the cultivation basin.

[0032] The tension spring is sleeved on the outer periphery of the sleeve slide plate and is used to provide elastic tension to the limiting block so that the limiting block fits against the bottom of the pressure basin, thereby limiting and fixing the cultivation basin.

[0033] The limiting ring plate is fixedly installed on the upper inner circumference of the connecting sleeve to limit the downward sliding of the sleeve slide plate, so as to prevent the cultivation pot from sliding upward when subjected to squeezing force, thereby affecting the mechanical stimulation effect on the green tea roots.

[0034] Preferably, the spraying assembly includes:

[0035] The connecting shaft has multiple sets and is slidably connected to the limiting arc groove;

[0036] A shaft connecting plate is used to fix and connect multiple sets of connecting shafts, so as to achieve the synchronization of the movement of multiple sets of connecting shafts;

[0037] A spray disc is fixedly installed on the side of the connecting shaft away from the shaft connecting plate. Spray pipe one and spray pipe two are installed on it, with spray pipe one located to the left of spray pipe two. Both spray pipe one and spray pipe two are equipped with a number of atomizing nozzles for atomizing spraying.

[0038] Preferably, the spray pipe is fixedly installed on the spray plate, and the spraying direction of the atomizing nozzle on the spray pipe is upper left. When the connecting shaft is at both ends of the limiting arc groove, the atomizing nozzle on the spray pipe can spray the back of the green tea seedling leaves on the left side of the spray pipe. When the connecting shaft is in the middle of the left side of the limiting arc groove, the atomizing nozzle on the spray pipe can spray the front of the green tea seedling leaves on the left side of the spray pipe.

[0039] The second spray pipe is rotatably mounted on the spraying disc, and a torsion spring connecting plate is fixedly mounted on the second spray pipe. The torsion spring connecting plate is fixedly connected to the spraying disc through a reset torsion spring. The reset torsion spring is used to spring back and reset the second spray pipe. In its natural state, the atomizing nozzle on the second spray pipe sprays downwards.

[0040] An adjusting gear is fixedly installed on the second spray pipe. An adjusting rack one and an adjusting rack two, which are meshed and connected to the adjusting gear, are fixedly installed on the base plate. Through the meshing and transmission of the adjusting rack one and the adjusting rack two with the adjusting gear, the second spray pipe rotates to adjust the spray angle of the atomizing nozzle. When the connecting shaft moves to the two ends of the limiting arc groove, the spray direction of the atomizing nozzle on the second spray pipe is all to the upper right, spraying the back of the green tea seedling leaves located on the right side of the second spray pipe. When the adjusting gear is separated from the adjusting rack one or the adjusting rack two, the second spray pipe rotates back to its original position under the action of the reset torsion spring, so that the spray direction of the atomizing nozzle on the second spray pipe is downward, spraying the front of the green tea seedling leaves located below the spraying assembly.

[0041] Preferably, the spray drive includes:

[0042] The arc-shaped rack is fixedly mounted on the base plate, and the arc of the rack is a proportionally enlarged version of the limiting arc groove.

[0043] A drive base plate is slidably disposed on the surface of an arc-shaped rack, on which a drive motor is fixedly mounted. A drive gear that meshes and transmits with the arc-shaped rack is fixedly mounted at the output end of the drive motor. The drive base plate is provided with a shaft connection hole that is connected to the spraying assembly.

[0044] The limiting guide rail is fixedly mounted on the outer periphery of the arc-shaped rack;

[0045] The limit slider slides in conjunction with the limit guide rail to guide and limit the movement of the drive base plate.

[0046] The beneficial effects of this invention are:

[0047] (1) By applying controllable mechanical stimulation to the cultivation pot through the pressure pot to promote the lignification development of the root system, and by combining the adjustable angle spraying component to achieve differentiated spraying on the front and back of the leaves, the survival rate of seedlings after transplanting is effectively improved and the water use efficiency is optimized. It has the advantages of improving the survival rate of seedlings, promoting root development and optimizing irrigation efficiency.

[0048] (2) This application realizes controllable mechanical stimulation of the root system of green tea seedlings. Through electromagnetic regulation, multi-directional uniform pressure is generated to simulate the pressure effect of natural soil environment on the root system, effectively enhancing the thickening of root cell walls and the development of lateral roots, thereby improving the stress resistance and survival rate of seedlings after transplanting.

[0049] (3) This application effectively solves the problem of insufficient water supply to the underside of tea seedling leaves. By dynamically adjusting the directional spraying, the stomata on the underside of the leaves receive sufficient water, maintaining normal transpiration and promoting photosynthetic efficiency, while ensuring the normal transport of secondary metabolites such as theanine. The mechanical transmission and elastic reset mechanism realize the automatic switching of the spraying angle, simplifying the equipment structure and reducing maintenance costs while ensuring irrigation effect. Attached Figure Description

[0050] The invention will now be further described with reference to the accompanying drawings.

[0051] Figure 1 This is a schematic diagram of the overall structure of a green tea seedling cultivation device according to the present invention;

[0052] Figure 2 This is a schematic diagram of the axonometric structure of a green tea seedling cultivation device according to the present invention;

[0053] Figure 3 This is a schematic diagram of the extrusion linkage mechanism of the present invention.

[0054] Figure 4 This is a three-dimensional structural diagram of the base of the device of the present invention;

[0055] Figure 5 This is a schematic diagram of the axial structure of the device base of the present invention;

[0056] Figure 6 This is a schematic diagram of the three-dimensional assembly structure of the pressure basin and the cultivation basin of the present invention.

[0057] Figure 7 This is a schematic cross-sectional view of the assembly structure of the pressure basin and the cultivation basin of the present invention.

[0058] Figure 8 This is a cross-sectional structural schematic diagram of the pressure basin of the present invention;

[0059] Figure 9 This is a three-dimensional structural diagram of the cultivation pot of the present invention;

[0060] Figure 10 This is the present invention. Figure 7 Enlarged structural diagram at point A;

[0061] Figure 11 This is a schematic diagram of the spray-driven structure of the present invention;

[0062] Figure 12 This is a three-dimensional structural schematic diagram of the spraying component of the present invention;

[0063] Figure 13 This is a schematic diagram of the axial structure of the spraying component of the present invention.

[0064] In the diagram: 1. Equipment base; 11. Base support; 12. Basin rack; 13. Basin trough; 14. Base upright; 15. Limiting arc groove; 16. Adjusting rack one; 17. Adjusting rack two; 2. Pressure basin; 21. Installation basin; 22. Basin bottom groove; 23. Bottom pressure ring; 24. Basin side groove; 25. Side groove slope; 26. Extrusion slider; 27. Slider slope; 28. Arc-shaped pressure block; 29. ​​Connecting rod through hole; 3. Cultivation basin; 31. Rigid basin bottom; 32. Flexible basin surround; 33. Connecting sleeve; 34. Limiting ring plate; 35. Sleeve sliding plate; 36. Sleeve sliding rod; 37. Limiting stop; 38. Tension spring; 4. Spray drive; 41 42. Arc-shaped rack; 43. Limiting guide rail; 44. Drive base plate; 45. Limiting slider; 46. Drive motor; 47. Drive gear; 58. Shaft connection hole; 59. Spraying assembly; 50. Connecting shaft; 51. Shaft connecting plate; 52. Spraying disc; 53. Spraying pipe one; 54. Spraying pipe two; 55. Atomizing nozzle; 56. Torsion spring connecting plate; 57. Reset torsion spring; 58. Adjusting gear; 69. Extrusion linkage mechanism; 60. Linkage fixing plate; 61. Linkage slide rod; 62. Reset spring; 63. Linkage pressure plate; 64. Drive rack; 65. Linkage gear; 66. Rack guide rail; 67. Transmission rack; 68. Lifting bracket; 69. Lifting connecting rod. Detailed Implementation

[0065] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] In existing technologies, traditional irrigation systems for cultivating green tea seedlings in greenhouses use a uniform top spraying method, which does not take into account the difference in stomatal density between the front and back of tea leaves. This results in insufficient water supply to the back of the leaves, affecting transpiration and photosynthetic efficiency. At the same time, existing cultivation equipment lacks mechanical stimulation of the seedling roots, leading to insufficient root development and a reduced transplant survival rate.

[0067] To address these issues, researchers discovered that the stomatal density on the underside of leaves is higher, necessitating a targeted increase in irrigation for this area, which cannot be adequately met by uniform spraying from above. Furthermore, roots experience mechanical resistance in natural soil environments, a stimulus lacking in artificial cultivation environments. Therefore, a method combining an adjustable spraying device with a pressure application device was proposed. This allows for differentiated irrigation of the front and back of the leaves by dynamically adjusting the spray angle, and controllable pressure is used to simulate soil resistance and enhance root strength.

[0068] Please see Figures 1-13 As shown, this invention relates to a green tea seedling cultivation device, comprising a base 1, a cultivation pot 3, a pressure basin 2, a spraying assembly 5, and a spraying drive 4. The base 1 is the main structure supporting the cultivation device, and its basin rack 12 has a basin groove 13 for fixing the pressure basin 2, providing stable support for subsequent mechanical stimulation. The cultivation pot 3 is a container for holding nutrient soil, and a flexible piezoresistive sensor is embedded in the pot wall to monitor root growth resistance. The pressure basin 2 is a device for applying controllable pressure, which can be adjusted via electromagnetic drive or hydraulic device, for example, using an electromagnet in conjunction with a squeezing slider 26 to generate a squeezing action. The spraying assembly 5 is a multi-angle spraying device, and the spraying drive 4 can use a rack and pinion mechanism or a servo motor to control its movement trajectory.

[0069] Specifically, when the pressure basin 2 applies periodic pressure to the cultivation pot 3, a flexible piezoresistive sensor provides real-time feedback on the root stress data. The operator adjusts the pressure intensity based on this data, enhancing the root system's resilience under controllable resistance. The spray drive 4 moves the spray assembly 5 along an arc-shaped trajectory. As it moves to different positions, the nozzle angle automatically adjusts. For example, in the left position, the spray pipe 54 tilts upwards and to the left, focusing on covering the underside of the leaves; when it moves to the middle, the nozzle turns vertically downwards, evenly wetting the front of the leaves. The pressure application and spraying action work in tandem through the control system, preventing over-irrigation that could lead to root hypoxia and promoting lateral root development through mechanical stimulation.

[0070] Compared with existing technologies, traditional equipment using fixed sprayers results in insufficient irrigation on the underside of leaves and lacks root pressure stimulation. This solution achieves differentiated irrigation on the front and back of leaves through a movable spraying component 5, effectively improving water use efficiency; the periodic compression of the pressure basin 2 simulates the natural soil environment, thickening the root cell walls, promoting root lignification, and significantly improving the environmental adaptability of seedlings after transplanting.

[0071] Please see Figures 1-5 As shown, this application further proposes that the number of washbasin racks 12 provided on the base support 11 is an odd number n, the number of spraying components 5 is (n+1) / 2, and spraying components 5 are provided above the two sets of washbasin racks 12 near the edge, and a set of spraying components 5 is provided above the washbasin rack 12 in the middle every other set of washbasin racks 12.

[0072] In this context, the odd number n refers to the total number of washbasin racks 12 being a natural number not divisible by 2, such as 3, 5, or 7. Specifically, this can be achieved by setting three sets of washbasin racks 12 on the base support 11, forming a symmetrical coverage base through an odd-numbered layout. The number of spray components 5 (n+1) / 2 means that when n=3, two sets are set, and when n=5, three sets are set. The specific number of devices can be determined through proportional calculations, ensuring effective overlap of the spray coverage radius. The spray components 5 are placed above the two edge washbasin racks 12, meaning that irrigation devices are arranged directly above the washbasin racks 12 located at the beginning and end of the base support 11, eliminating coverage blind spots through edge equipment. The spray components 5 are spaced apart on the middle washbasin racks 12 to reduce system complexity by decreasing the equipment density in the middle area.

[0073] Specifically, when the base support 11 is equipped with five sets of basin racks 12, the number of spraying components 5 is three. One spraying component 5 is positioned directly above the first and last sets of basin racks 12, and a third spraying component 5 is positioned above the second set of the three middle sets of basin racks 12. During movement, the coverage area of ​​the first and last components extends outwards, while the coverage area of ​​the middle components expands to both sides, forming a continuous coverage band. The edge spraying components 5, with their fixed positions, ensure directional spraying of the seedlings at the ends, while the spraying components 5 positioned at intervals in the middle complement each other by their movement trajectories, covering adjacent areas. This layout ensures that the effective coverage diameter of each spraying component 5 is equal to twice the spacing between the basin racks 12, and the overlapping trajectories formed by the movement of the equipment guarantee no areas are missed.

[0074] Compared to existing technologies, traditional uniform spraying systems place spraying components 5 above each basin stand 12, resulting in a number of devices equal to the number of basin stands 12. This solution reduces the number of devices by nearly half through an odd-numbered layout and spacing. Simultaneously, it utilizes the overlapping coverage characteristics of the spraying component 5's movement trajectory to ensure equivalent irrigation effects across all cultivation areas. Existing technologies suffer from excessive overlap between adjacent spraying areas due to dense equipment density, leading to water waste. This solution optimizes the layout to create precise complementarity between adjacent device coverage areas, satisfying the irrigation needs of the densely ventilated area on the back side while avoiding duplicate spraying.

[0075] The extrusion linkage mechanism 6 includes:

[0076] A linkage fixing plate 61 is fixedly installed on the base plate 14, and a linkage slide rod 62 is slidably connected through it. The upper end of the linkage slide rod 62 is fixedly connected to a linkage pressure plate 64 that moves and contacts the spraying component 5.

[0077] The return spring 63 is sleeved on the outer periphery of the linkage slide rod 62 and is used to spring back and reset the linkage pressure plate 64.

[0078] The linkage gear 66 is rotatably mounted on the base plate 14;

[0079] The drive rack 65 is fixedly connected to the lower end of the linkage slide rod 62 and meshes with the linkage gear 66;

[0080] A rack and pinion guide 67 is fixedly mounted on the base plate 14, and a transmission rack 68 is slidably connected to it. The transmission rack 68 is meshed with the linkage gear 66 and is distributed in a 180° circular array with the drive rack 65.

[0081] The lifting bracket 69 is fixedly installed on the lower part of the transmission rack 68. The lifting bracket 69 is provided with a plurality of lifting connecting rods 610 corresponding to the position and number of the pressure basin 2. The lifting connecting rods 610 are used to drive the bottom pressure ring 23 to move up and down.

[0082] Please see Figures 4-5 As shown, this application further proposes to fix a base plate 14 on one side of the base support 11, and to provide a limiting arc groove 15 on the base plate 14 for guiding the movement of the spraying component 5.

[0083] Specifically, the connecting shaft 51 of the spraying assembly 5 slides within the limiting arc groove 15, and the curved contour of the arc groove forces the spraying assembly 5 to move along a predetermined trajectory. When the drive device moves the spraying assembly 5, the sliding contact surface of the connecting shaft 51 within the arc groove forms a double constraint, limiting lateral offset and controlling longitudinal displacement. The base plate 14, as a rigid carrier, effectively absorbs the vibration generated when the spraying assembly 5 moves, preventing the guide structure from shifting due to support deformation. The curvature of the limiting arc groove 15 is calculated and set to match the canopy distribution pattern of the tea seedlings, enabling precise matching of the spray coverage area without additional calibration during spray angle adjustment.

[0084] Compared with existing technologies, traditional guiding devices mostly use linear guides and rotary joints to achieve angle adjustment, which has the drawbacks of complex structure and large cumulative error. This solution transforms two-dimensional motion into single-dimensional sliding through an integral arc groove structure, eliminating assembly errors caused by the cooperation of multiple components. In existing technologies, the guiding mechanism is directly mounted on the side of the support, which is easily affected by the deformation of the support and thus affects the positioning accuracy. However, the base plate 14, as an independent load-bearing structure, has higher rigidity than the support body, significantly improving the stability of the guiding system.

[0085] Through the above technical solution, this application achieves precise control of the movement trajectory of the spraying component 5, solving the problem of spray angle deviation caused by structural gaps in traditional guiding devices. The physical constraint of the limiting arc groove 15 effectively suppresses the positional drift of the spraying component 5 during movement, ensuring that the atomizing nozzle 56 always adjusts the spray direction according to the preset path. The rigid support characteristics of the base plate 14 block the transmission of equipment vibration to the guiding structure, ensuring the repeatability and accuracy of the spray angle during long-term operation. The arc groove guiding mechanism simplifies the motion control logic, enabling programmed control of the spray angle without the need for an angle sensor.

[0086] Please see Figures 6-8 As shown, this application further proposes a pressure basin 2, including a mounting basin 21, which is an inverted frustum-shaped cylindrical structure with an open top, and its inner wall is provided with a plurality of basin side grooves 24 arranged in a ring array; a bottom pressure ring 23, which is installed on the inner bottom of the mounting basin 21, and is controlled to move up and down in conjunction with the spraying assembly 5 through a compression linkage mechanism 6; a compression slider 26, which is slidably disposed in the basin side groove 24, and its sliding position in the basin side groove 24 is controlled by cooperating with the bottom pressure ring 23; and an arc-shaped pressure block 28, which is fixedly installed on the inner side of the compression slider 26, for compressing the outer wall of the cultivation basin 3 to provide mechanical stimulation to the green tea roots.

[0087] The upper part of the side groove 24 of the basin is provided with a side groove slope 25, and the upper part of the extrusion slider 26 is provided with a slider slope 27 that cooperates with the side groove slope 25. The extrusion slider 26 is driven to slide upward by the repulsive force between the bottom pressure ring 23 and the extrusion slider 26. The wedge drive drives the extrusion slider 26 to slide towards the inside of the installation basin 21, thereby driving the arc-shaped pressure block 28 to move towards the cultivation basin 3 to compress the green tea roots. The magnitude of the extrusion force is controlled by controlling the magnitude of the magnetic force.

[0088] Please see Figures 1-3 As shown, this application further proposes a compression linkage mechanism 6, including a linkage fixing plate 61, which is fixedly installed on the base plate 14, and a linkage slide rod 62 is slidably connected through it. The upper end of the linkage slide rod 62 is fixedly connected to a linkage pressure plate 64 that moves in contact with the spraying assembly 5; a return spring 63, which is sleeved on the outer periphery of the linkage slide rod 62, for springback reset of the linkage pressure plate 64; a linkage gear 66, which is rotatably installed on the base plate 14; and a drive rack 65, which is fixedly connected to the lower end of the linkage slide rod 62 and meshes with the linkage gear 66. A guide rail 67 is fixedly installed on the base plate 14, and a transmission rack 68 is slidably connected to it. The transmission rack 68 is meshed with the linkage gear 66 and is distributed in a 180° circumferential array with the drive rack 65. A lifting bracket 69 is fixedly installed on the lower part of the transmission rack 68. The lifting bracket 69 is provided with a number of lifting connecting rods 610 corresponding to the position and number of the pressure basin 2. The lifting connecting rods 610 are used to drive the bottom pressure ring 23 to move up and down. The bottom of the mounting basin 21 is provided with a connecting rod through hole 29 for the lifting connecting rods 610 to slide up and down.

[0089] Specifically, when the spray drive 4 drives the spray assembly 5 to slide within the limiting arc groove 15, after the spray assembly 5 contacts the linkage pressure plate 64, it drives the linkage pressure plate 64 to move downward. This causes the linkage pressure plate 64, through the linkage slide rod 62, to drive the drive rack 65 to move downward. Through the meshing transmission of the linkage gear 66, it further drives the transmission rack 68 to slide upward along the rack guide rail 67. Simultaneously, the transmission rack 68 drives the lifting bracket 69 to move upward. The lifting bracket 69, through the lifting connecting rod 610 corresponding to the pressure basin 2, is inserted upward into the installation basin 21. The bottom pressure ring 23 inside the installation pot 21 slides upward, and the bottom pressure ring 23 drives the extrusion slider 26 to move upward. The arc-shaped pressure block 28 fixed on the extrusion slider 26 moves radially with the displacement of the slider, forming a uniform extrusion on the outer wall of the cultivation pot 3, thereby providing mechanical stimulation to the green tea roots. When the spraying component 5 continues to move until it separates from the linkage pressure plate 64, the linkage pressure plate 64 will rebound and reset under the action of the return spring 63, so that the arc-shaped pressure block 28 cancels the uniform extrusion on the outer wall of the cultivation pot 3, thereby achieving intermittent stimulation of the green tea roots.

[0090] In an optional embodiment, the bottom pressure ring 23 is an electromagnetic ring, which is fixedly installed on the inner bottom of the mounting basin 21, and the magnetic pole direction and magnetic strength are controlled by energizing; the extrusion slider 26 is a magnetic component, which is slidably disposed in the side groove 24 of the basin, and its sliding position in the side groove 24 of the basin is controlled by cooperating with the bottom pressure ring 23; the arc-shaped pressure block 28 is fixedly installed on the inner side of the extrusion slider 26, and is used to extrude mechanical stimulation to the green tea roots by extruding the outer wall of the cultivation basin 3. When the bottom pressure ring 23 is an electromagnetic ring, the linkage drive of the extrusion linkage mechanism 6 to the bottom pressure ring 23 is canceled.

[0091] Specifically, the inverted frustum structure of the mounting pot 21 forms a ring-shaped array of side grooves 24, providing a spatial basis for simultaneous multi-directional pressure application. When the bottom pressure ring 23 is energized to generate a magnetic field, the extrusion slider 26 undergoes controllable displacement within the side grooves 24, achieving bidirectional adjustment through magnetic attraction or repulsion. The arc-shaped pressure block 28 fixed on the extrusion slider 26 moves radially with the slider's displacement, creating uniform pressure on the outer wall of the cultivation pot 3. The combination of multiple ring-shaped side grooves 24 and corresponding sliders generates a surrounding pressure field, ensuring uniform force on the roots in all directions. The electromagnetic control method allows for precise control of the extrusion force by adjusting the current parameters, meeting the pressure requirements of different growth stages.

[0092] Compared to existing technologies, traditional cultivation equipment often uses a fixed pot structure, making it impossible to apply controllable pressure to the seedling roots. Existing mechanical pressure devices suffer from problems such as unidirectional pressure application, non-adjustable pressure, and wear-prone mechanical transmission structures. This solution achieves non-contact actuation through electromagnetic control, combined with a ring-array distribution of pressure application units, generating a multi-directional uniform pressure field. This avoids mechanical wear while enabling precise control of pressure intensity and direction.

[0093] Please see Figures 6-9 As shown, this application further proposes a green tea seedling cultivation device, including a cultivation pot 3 and a pressure basin 2. The cultivation pot 3 includes a rigid pot bottom 31, and the outer periphery of the rigid pot bottom 31 is covered with a flexible pot rim 32 for holding nutrient soil. A limiting component is provided at the bottom of the rigid pot bottom 31, and a basin bottom groove 22 that cooperates with the limiting component is provided at the bottom of the pressure basin 2.

[0094] The rigid pot bottom 31 refers to the bottom support structure of the pot made of rigid material, used to support the flexible pot surround 32 and maintain the overall shape of the pot. The flexible pot surround 32 refers to the elastic container structure wrapped around the rigid pot bottom 31, used to hold the nutrient soil and transmit lateral compressive force. The limiting component refers to the mechanical locking device set at the bottom of the pot to fix the cultivation pot 3.

[0095] Specifically, the rigid basin bottom 31, acting as a rigid load-bearing platform, effectively resists the lateral loads applied by the pressure basin 2. The flexible basin surround 32, made of elastic material, wraps around the outer perimeter of the rigid basin bottom 31, allowing for controlled deformation while maintaining the basin's shape. When the arc-shaped pressure block 28 of the pressure basin 2 applies lateral pressure, the flexible basin surround 32 evenly transmits the pressure to the internal nutrient soil. The limiting component is rigidly connected to the rigid basin bottom 31 via the connecting sleeve 33. Under the action of the tension spring 38, the sleeve slide plate 35 drives the limiting block 37 to embed into the cross-shaped groove of the basin bottom groove 22, forming a bidirectional constraint. When the pressure basin 2 applies mechanical stimulation, the cross-shaped limiting structure of the limiting block 37 and the basin bottom groove 22 effectively prevents the basin from rotating or shifting laterally, ensuring that the pressure is always transmitted in the predetermined direction.

[0096] Compared to existing technologies, traditional cultivation pots (3) often use a single-piece plastic body, which is prone to displacement under lateral pressure, leading to uneven stress on the roots. Existing fixing methods mostly rely on gravity positioning or simple clips, which cannot resist the shear forces generated by periodic mechanical stimulation. This solution, through a composite structure design of a rigid pot bottom (31) and a flexible pot surround (32), ensures efficient pressure transmission while utilizing the cross-interlocking structure between the limiting components and the bottom groove of the pot (22) to form a multi-directional constraint mechanism, overcoming the displacement problem of traditional fixing methods.

[0097] Please see Figures 9-10 As shown, this application further proposes a limiting component for a cultivation pot 3, including a connecting sleeve 33 fixedly installed at the center of the bottom of a rigid pot bottom 31, a sleeve slide plate 35 slidably disposed inside the connecting sleeve 33, a limiting block 37 fixedly connected to the side of the sleeve slide rod 36 away from the sleeve slide plate 35, a tension spring 38 sleeved on the outer periphery of the sleeve slide plate 35, and a limiting ring plate 34 fixedly disposed on the upper part of the inner periphery of the connecting sleeve 33.

[0098] The connecting sleeve 33 is a tubular structure that coincides with the central axis of the rigid basin bottom 31, used to ensure the symmetry of the force on the limiting component. The sleeve slide plate 35 is a disc component with a sliding guide structure, which achieves vertical displacement control of the limiting block 37 through sliding friction. The tension spring 38 is a helical compression spring, which maintains the contact pressure between the limiting block 37 and the bottom of the pressure basin 2 through preload. The limiting ring plate 34 is an annular retaining ring, used to limit the maximum displacement stroke of the sleeve slide plate 35.

[0099] Specifically, when the cultivation basin 3 is placed into the pressure basin 2, the limiting block 37 forms a cross-shaped limiting structure with the basin bottom groove 22 through rotation. The tension spring 38 generates a continuous upward rebound force under compression, keeping the bottom surface of the limiting block 37 in close contact with the bottom of the pressure basin 2. The contact surface between the limiting ring plate 34 and the sleeve sliding plate 35 forms a mechanical stop, preventing the cultivation basin 3 from sliding upward in the vertical direction. The sliding fit between the sleeve sliding plate 35 and the connecting sleeve 33 allows the limiting block 37 to adaptively adjust its position within the elastic range, eliminating assembly gaps.

[0100] Please see Figures 12-13 As shown, this application further proposes a spraying assembly 5 including a connecting shaft 51, a shaft connecting plate 52, a spray disc 53, a first spray pipe 54, and a second spray pipe 55. Multiple sets of connecting shafts 51 are provided and slide through the limiting arc groove 15. The shaft connecting plate 52 is fixedly connected to multiple sets of connecting shafts 51 to achieve synchronous movement. The spray disc 53 is fixedly installed at the end of the connecting shafts 51, and the first spray pipe 54 and the second spray pipe 55 are installed on it. The first spray pipe 54 is fixedly installed with its atomizing nozzle 56 facing upward to the left. The second spray pipe 55 is rotated via a reset torsion spring 58 and an adjusting gear 59 rack mechanism.

[0101] Among them, the connecting shaft 51 is a guide component that slides along the limiting arc groove 15, and its sliding trajectory determines the spatial position of the spray assembly 5. The shaft connecting plate 52 is a rigid plate that connects multiple connecting shafts 51, ensuring the stability of multi-axis synchronous movement. Spray pipe one 54 is a spray pipe with a fixed angle, which can be implemented by using PVC pipe with a 45-degree oblique nozzle. Its upper left nozzle covers the back of the left blade when it moves to both sides. Spray pipe two 55 is a spray pipe with an adjustable angle, which changes the nozzle direction by rotating through the meshing of a rack and pinion. The adjusting gear 59 is a transmission component that meshes with the rack and pinion to realize mechanical transmission angle adjustment. The reset torsion spring 58 is an elastic element that provides rebound force, so that when spray pipe two 55 disengages from the rack and automatically resets to spray downwards.

[0102] Specifically, when the spraying assembly 5 moves along the limiting arc groove 15 to its extreme positions on both sides, the upper left atomizing nozzle 56 of the spray pipe 1 54 sprays water directionally onto the back of the left-side plant leaves. At this time, the adjusting gear 59 engages with the adjusting rack 16, driving the spray pipe 2 55 to rotate clockwise, so that its upper right nozzle covers the back of the right-side leaves. When the spraying assembly 5 moves to the middle area of ​​the arc groove, the spray pipe 1 54 maintains a fixed angle to replenish water to the front of the plant leaves. At this time, the adjusting gear 59 disengages from the rack, and the spray pipe 2 55 rotates counterclockwise to reset under the action of the reset torsion spring 58, so that the atomizing nozzle 56 sprays water vertically downward onto the front of the top leaves of the plant. Multiple sets of connecting shafts 51 maintain synchronous displacement through shaft connecting plates 52, ensuring consistent operation of the spray pipes at different positions. The left-right arrangement of the spray pipe 1 54 and the spray pipe 2 55 forms a three-dimensional coverage of the sides and top of the plant.

[0103] Compared to existing technologies, traditional uniform spraying methods do not consider the high stomata density on the back of tea leaves, leading to insufficient water absorption. This solution achieves differentiated and precise spraying of the front and back of the leaves through spatial linkage and mechanical transmission mechanisms. The nozzle angle automatically switches during movement, ensuring sufficient water replenishment to the densely stomata area on the back. Simultaneously, a dual-pipe collaborative working mode completes three-dimensional irrigation of the leaves on both sides and the top during a single movement, reducing the number of devices compared to traditional fixed nozzles.

[0104] Please see Figure 2 , Figures 12-13 As shown, this application further proposes a spraying assembly 5 including a spray pipe 54 fixedly mounted on a spraying disc 53 and a spray pipe 55 rotatably mounted. The atomizing nozzle 56 of the spray pipe 54 is preset to the upper left direction. The spray pipe 55 is driven by an adjusting gear 59 meshing with an adjusting rack on the base plate 14, and is automatically reset by a reset torsion spring 58. When the spraying assembly 5 moves to both ends of the limiting arc groove 15, the spray pipe 54 covers the back of the left blade, and the spray pipe 55 is driven by the rack to rotate to the upper right direction to cover the back of the right blade. When it moves to the middle area, the spray pipe 54 turns to cover the front of the left blade, and the spray pipe 55, after disengaging from the rack, returns to the downward spraying state under the action of the torsion spring to cover the front of the lower blade.

[0105] Spray pipe 54 is fixedly mounted on spray disc 53, with its nozzles preset to the upper left, allowing the spray assembly 5 to switch the coverage angle of the front and back of the blades when moved to different positions. The meshing transmission between the adjusting gear 59 and the adjusting rack achieves precise control of the rotation angle of spray pipe 55 through mechanical position linkage. A reset torsion spring 58 is installed between the torsion spring connecting plate 57 and the spray disc 53, and a preload setting ensures that spray pipe 55 automatically resets to the downward spraying state when disengaged from the rack.

[0106] Specifically, when the spraying assembly 5 moves along the limiting arc groove 15 to the positions of both ends, the upper left nozzle of the spray pipe 54 sprays the back of the left seedling leaf. At this time, the adjusting gear 59 engages with the adjusting rack 16 or the adjusting rack 17, forcing the spray pipe 55 to rotate counterclockwise to the upper right, covering the back of the right leaf. When the spraying assembly 5 moves to the middle left of the limiting arc groove 15, the nozzle direction of the spray pipe 54 changes to face the front of the left leaf due to the change in the equipment's movement trajectory. Simultaneously, the adjusting gear 59 disengages from the rack, and the spray pipe 55 rotates back to the downward spraying state under the action of the return torsion spring 58, spraying vertically onto the front of the lower leaf. This process achieves automatic adjustment of the nozzle angle according to the position change through the cooperation of the spraying assembly 5's movement path and the mechanical transmission mechanism.

[0107] Compared to existing technologies, traditional spraying systems use fixed nozzles for uniform spraying, failing to differentiate the stomata distribution on the front and back of tea leaves. This solution utilizes a combination of a fixed-angle spray pipe (54) and an adjustable-angle spray pipe (55), along with the coordinated control of the movement path and a rack and pinion transmission mechanism, to achieve differentiated irrigation of the front and back of the leaves under a single drive source. This solution relies entirely on mechanical structures for directional spraying, reducing equipment costs and avoiding the risk of electronic component failure in humid environments.

[0108] Through the above technical solution, this application can automatically switch between front and back spray modes during equipment movement based on the stomatal distribution characteristics of tea seedling leaves. When the spraying component 5 moves to the sides of the plant, it focuses on precise irrigation of the high stomatal density area on the back of the leaves; when it moves above the plant, it switches to basic moisturizing of the front of the leaves. This solution effectively solves the problem of reduced transpiration and decreased photosynthetic efficiency caused by insufficient water supply to the back of the leaves in existing technologies. At the same time, the mechanical linkage mechanism simplifies the equipment structure and improves the reliability and maintenance convenience of the irrigation system.

[0109] Please see Figure 1 , Figure 2 and Figure 11 As shown, this application further proposes a spray drive 4 including an arc-shaped rack 41, a drive base plate 43, a drive motor 45, a drive gear 46, a limiting guide rail 42, and a limiting slider 44. The arc-shaped rack 41 is fixedly mounted on the base plate 14, and its arc is a proportionally enlarged version of the limiting arc groove 15. The drive base plate 43 is slidably disposed on the surface of the arc-shaped rack 41, and the drive motor 45 and the drive gear 46 are mounted on it, with the drive gear 46 meshing with the arc-shaped rack 41 for transmission. The limiting guide rail 42 is fixedly disposed on the outer periphery of the arc-shaped rack 41, and the limiting slider 44 slides in cooperation with the limiting guide rail 42. The drive base plate 43 is provided with a shaft connection hole 47 for connecting to the spray assembly 5.

[0110] Specifically, the drive motor 45, through the meshing of the drive gear 46 and the arc-shaped rack 41, converts rotational motion into linear movement along the arc-shaped rack 41. The proportionally enlarged arc-shaped rack 41 forms a geometric similarity with the limiting arc groove 15, ensuring that the displacement of the spray assembly 5 within the limiting arc groove 15 and the displacement of the drive base plate 43 on the arc-shaped rack 41 are strictly proportional when the drive gear 46 rotates by a unit angle. The sliding fit between the limiting guide rail 42 and the limiting slider 44 forms a double constraint, synchronously eliminating lateral displacement and deflection torque during the movement of the drive base plate 43. The shaft connection hole 47, through rigid connection, transmits the displacement of the drive base plate 43 to the connecting shaft 51 of the spray assembly 5 without error, ensuring that the angle adjustment of the atomizing nozzles 56 of spray pipe one 54 and spray pipe two 55 is completely synchronized with the drive displacement.

[0111] Through the above technical solution, this application achieves precise control of the movement angle of the spraying component 5, enabling the atomizing nozzle 56 to accurately cover the front and back of the leaves according to a preset trajectory. The synergistic effect of the drive mechanism and the guide mechanism effectively suppresses spray angle deviation, ensuring uniform distribution of water on the front and back of the leaves during irrigation. The proportional amplification characteristic of mechanical transmission allows minute drive displacements to be converted into precise spray angle adjustments, solving the problem of uneven irrigation caused by transmission errors in existing equipment.

[0112] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A green tea seedling cultivation device, characterized in that, include: The equipment base (1), which serves as the main support for the cultivation equipment, includes a base support (11), on which several basin racks (12) are provided, and on which multiple basin troughs (13) are evenly provided. The cultivation pot (3) contains nutrient soil for cultivating green tea seedlings, and a flexible piezoresistive sensor is embedded in the cultivation pot (3) to monitor the root force of the green tea seedlings in real time. A pressure basin (2) is placed on a basin trough (13), and the cultivation pot (3) is placed inside the pressure basin (2). The pressure basin (2) is used to apply external pressure to the cultivation pot (3) to provide mechanical stimulation to the roots of the green tea seedlings. The spraying component (5) is installed on the equipment base (1) and is used for spraying and irrigating green tea seedlings during cultivation. Spray drive (4), which is used to drive the spray assembly (5) to move and adjust the angle of the spray assembly (5) to spray green tea; A base support plate (14) is fixedly installed on one side of the base support (11), and a limiting arc groove (15) is provided on the base support plate (14) to guide the movement of the spraying component (5). The pressure basin (2) includes: The basin (21) is an inverted frustum-shaped cylindrical structure with an open top, and its inner wall is provided with multiple basin side grooves (24) arranged in a ring array. The bottom pressure ring (23) is installed on the inner bottom of the installation basin (21) and is linked to the spraying assembly (5) through the extrusion linkage mechanism (6); The extrusion slider (26) is slidably disposed in the basin side groove (24), and its sliding position in the basin side groove (24) is controlled by cooperating with the bottom pressure ring (23); The arc-shaped pressure block (28) is fixedly installed on the inner side of the extrusion slider (26) to extrude mechanical stimulation to the green tea roots by extruding the outer wall of the cultivation pot (3); The upper part of the basin side groove (24) is provided with a side groove slope (25), and the upper part of the extrusion slider (26) is provided with a slider slope (27) that cooperates with the side groove slope (25). The spraying assembly (5) includes: The connecting shaft (51) is provided in multiple sets and is slidably connected to the limiting arc groove (15); A shaft connecting plate (52) is used to fix and connect multiple sets of connecting shafts (51) to achieve synchronous movement of multiple sets of connecting shafts (51); The spraying disc (53) is fixedly installed on the side of the connecting shaft (51) away from the shaft connecting plate (52). Spraying pipe one (54) and spraying pipe two (55) are installed on it, and spraying pipe one (54) is located to the left of spraying pipe two (55). Both spraying pipe one (54) and spraying pipe two (55) are equipped with a number of atomizing nozzles (56) for atomizing spraying. The spray pipe (54) is fixedly installed on the spray plate (53), and the spraying direction of the atomizing nozzle (56) on the spray pipe (54) is the upper left. The second spray pipe (55) is rotatably mounted on the spray disc (53), and a torsion spring connecting plate (57) is fixedly mounted on the second spray pipe (55). The torsion spring connecting plate (57) is fixedly connected to the spray disc (53) through a reset torsion spring (58). The reset torsion spring (58) is used to spring back and reset the second spray pipe (55). In its natural state, the atomizing nozzle (56) on the second spray pipe (55) sprays downwards. An adjusting gear (59) is fixedly installed on the second spray pipe (55), and an adjusting rack (16) and an adjusting rack (2) are fixedly installed on the base plate (14) and are meshed and connected to the adjusting gear (59).

2. The green tea seedling cultivation equipment according to claim 1, characterized in that, The number of basin racks (12) set on the base support (11) is an odd number n, the number of spraying components (5) is (n+1) / 2, and spraying components (5) are set on the two sets of basin racks (12) near the edge, and a set of spraying components (5) is set on the basin rack (12) in the middle every other set of basin racks (12).

3. The green tea seedling cultivation equipment according to claim 1, characterized in that, The extrusion linkage mechanism (6) includes: A linkage fixing plate (61) is fixedly installed on the base plate (14), and a linkage slide rod (62) is slidably connected through it. The upper end of the linkage slide rod (62) is fixedly connected to a linkage pressure plate (64) that moves in contact with the spraying component (5). The return spring (63) is sleeved on the outer periphery of the linkage slide rod (62) and is used to spring back and reset the linkage pressure plate (64); The linkage gear (66) is rotatably mounted on the base plate (14); The drive rack (65) is fixedly connected to the lower end of the linkage slide bar (62) and meshes with the linkage gear (66); A rack and pinion guide (67) is fixedly mounted on a base plate (14), and a transmission rack (68) is slidably connected thereon. The transmission rack (68) meshes with a linkage gear (66) and is distributed in a 180° circumferential array with the drive rack (65). The lifting bracket (69) is fixedly installed on the lower part of the transmission rack (68). The lifting bracket (69) is provided with a number of lifting rods (610) corresponding to the position and number of the pressure basin (2). The lifting rods (610) are used to drive the bottom pressure ring (23) to move up and down.

4. The green tea seedling cultivation equipment according to claim 1, characterized in that, The cultivation pot (3) includes a rigid pot bottom (31), the outer periphery of which is covered with a flexible pot rim (32) for holding nutrient soil. A limiting component is provided at the bottom of the rigid pot bottom (31), which is used to fix the cultivation pot (3) on the pressure basin (2). The bottom of the pressure basin (2) is provided with a basin bottom groove (22) that cooperates with the limiting component.

5. The green tea seedling cultivation equipment according to claim 4, characterized in that, The limiting component includes: The connecting sleeve (33) is fixedly installed at the bottom center of the rigid basin bottom (31); The sleeve slide plate (35) is slidably disposed inside the connecting sleeve (33). A sleeve slide rod (36) is fixedly disposed on the side of the sleeve slide plate (35) away from the hard basin bottom (31). The sleeve slide rod (36) slides through the bottom of the connecting sleeve (33). A limiting block (37) is fixedly connected to the side of the sleeve slide rod (36) away from the sleeve slide plate (35); The tension spring (38) is sleeved on the outer periphery of the sleeve slide plate (35) and is used to provide elastic tension to the limit stop (37) so that the limit stop (37) fits against the bottom of the pressure basin (2); The limiting ring plate (34) is fixedly installed on the upper inner circumference of the connecting sleeve (33) to limit the downward sliding of the sleeve slide plate (35).

6. The green tea seedling cultivation equipment according to claim 1, characterized in that, The spray drive (4) includes: The arc-shaped rack (41) is fixedly installed on the base plate (14), and the arc of the arc-shaped rack (41) is a proportionally enlarged version of the limiting arc groove (15); A drive base plate (43) is slidably disposed on the surface of an arc rack (41), and a drive motor (45) is fixedly mounted on it. The output end of the drive motor (45) is fixedly mounted with a drive gear (46) that meshes and transmits with the arc rack (41). The drive base plate (43) is provided with a shaft connection hole (47) that is connected to the spraying assembly (5). The limiting guide rail (42) is fixedly installed on the outer periphery of the arc-shaped rack (41); The limiting slider (44) slides in conjunction with the limiting guide rail (42) and plays a guiding and limiting role in the movement of the drive base plate (43).

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