Tobacco leaf fertilizer sprayer

Abstract

The utility model relates to the technical field of agriculture and forestry equipment, in particular to a tobacco leaf fertilizer sprayer which comprises a bearing support, a liquid storage tank, a spraying mechanism and an adjusting mechanism, and the liquid storage tank is installed on the top of the bearing support and communicated with the spraying mechanism; the adjusting mechanism comprises a lifting assembly and an angle adjusting assembly, the spraying mechanism comprises a spraying head assembly, the lifting assembly comprises a rotating screw rod and a sliding block, the rotating screw rod is connected to the bearing support, the sliding block is in threaded connection to the rotating screw rod, the angle adjusting assembly comprises a rotating seat and a spherical hinge joint, and the rotating seat is connected with the sliding block; the nozzle assembly is movably connected to the rotating base through the spherical hinge joint, the sliding block moves up and down along with rotation of the rotating screw rod, so that the height of the nozzle assembly is adjusted, and the spraying angle of the nozzle assembly is adjusted through the spherical hinge joint. The spraying uniformity and coverage range of the foliar fertilizer can be improved, the requirements of tobacco plants in different growth stages can be met, and meanwhile, the structure is simple, and operation and maintenance are convenient.

Description

Technical Field

[0001] This utility model relates to the field of agricultural and forestry equipment technology, and in particular to a tobacco foliar fertilizer sprayer. Background Technology

[0002] In tobacco cultivation, foliar fertilizer application technology has been widely used due to its advantages such as rapid replenishment of plant nutrients and improved fertilizer utilization. However, existing foliar fertilizer spraying devices have certain limitations in terms of atomization uniformity, spray range control, and ease of operation, which affect fertilization effectiveness and operational efficiency.

[0003] Patent CN110882872B discloses a uniform atomizing spraying device for building construction. Through the cooperation of a hydraulic cylinder, a hydraulic telescopic rod, and a sliding chute, the spray pipe can move under the roof slab, allowing the spraying position to be adjusted according to the building materials to ensure uniform spraying. However, this technical solution is mainly designed for cleaning needs in the building construction field, and its spray pipe movement range and atomizing nozzle arrangement are not suitable for tobacco foliar fertilizer application scenarios.

[0004] Patent CN113100205B discloses an automatic sprayer for agriculture and forestry. Through the coordinated design of a height adjustment device and an angle adjustment device, the atomizing nozzle can be flexibly adjusted in both horizontal and vertical directions, solving the problem of blind spots caused by the fixed spraying height and non-adjustable angle of traditional sprayers. However, the height adjustment device and angle adjustment device in this technical solution have relatively complex structures, increasing equipment maintenance costs and operational difficulty. Furthermore, the device does not provide precise control over the particle size of the atomized particles, which may affect the nutrient absorption efficiency of tobacco leaves.

[0005] The aforementioned problems indicate that existing foliar fertilizer spraying devices still need improvement in terms of atomization uniformity, spraying range flexibility, and structural simplification. Therefore, this invention provides a tobacco foliar fertilizer sprayer with uniform atomization, aiming to optimize atomized particles, improve spraying range flexibility, and simplify the device structure to meet the needs of the tobacco planting industry for efficient and convenient foliar fertilizer spraying technology. Utility Model Content

[0006] This invention addresses the shortcomings of existing technologies by developing a tobacco foliar fertilizer sprayer, aiming to improve the problems of uneven atomization, inconvenient spraying range adjustment, and complex structure in existing technologies.

[0007] The technical solution to the technical problem solved by this utility model is as follows:

[0008] This application provides a tobacco foliar fertilizer sprayer, including a support frame, a liquid storage tank, a spraying mechanism and an adjusting mechanism. The liquid storage tank is equipped with a stirring device and is installed on the top of the support frame and communicates with the spraying mechanism.

[0009] The adjustment mechanism includes a lifting assembly and an angle adjustment assembly. The spraying mechanism includes a nozzle assembly. The lifting assembly includes a rotating screw and a slider. The rotating screw is connected to the support bracket, and the slider is threadedly connected to the rotating screw. The angle adjustment assembly includes a rotating seat and a spherical joint. The rotating seat is connected to the slider, and the nozzle assembly is movably connected to the rotating seat via the spherical joint. The slider moves up and down as the rotating screw rotates, thereby adjusting the height of the nozzle assembly. The spray angle of the nozzle assembly is adjusted via the spherical joint.

[0010] As an improvement to the above solution, the nozzle assembly includes a nozzle tube, inside which multiple layers of guide vanes are arranged, and guide holes are formed on the guide vanes, forming a guide channel between the guide vanes. A microporous membrane is provided at the outlet of the nozzle tube. A diffuser is connected to the outlet of the nozzle assembly, and a filter screen is placed at the outlet of the diffuser. The spraying mechanism also includes an atomization control component. The nozzle assembly is connected to the liquid storage tank through a delivery pipeline equipped with the atomization control component. The atomization control component includes a flow regulating valve and a pressure pump.

[0011] As an improvement to the above solution, the spraying mechanism further includes an auxiliary airflow assembly, which includes a fan and an air duct. One end of the air duct is connected to the fan, and the other end extends to the outlet of the nozzle assembly. An adjusting nozzle is provided at the outlet end of the air duct.

[0012] As an improvement to the above solution, the inner wall of the diffusion hood is provided with a spiral groove to guide the liquid to flow out in a tangential direction.

[0013] As an improvement to the above solution, the stirring device includes a drive motor and a stirring paddle. The drive motor is fixedly installed on the top of the liquid storage tank and drives the stirring paddle to rotate through a rotating shaft.

[0014] As an improvement to the above scheme, the blades of the stirring paddle are arc-shaped.

[0015] As an improvement to the above solution, the lifting assembly further includes a handwheel and a guide rod. The rotating screw is vertically installed on the left and right sides of the support bracket, and a handwheel is provided on its top. The handwheel is fixedly connected to the rotating screw through a keyway. The guide rod is parallel to the rotating screw and passes through the slider.

[0016] As an improvement to the above solution, a support arm is fixedly connected to the inner side of the slider, and the rotating seat is fixedly connected to the support arm.

[0017] As an improvement to the above solution, the angle adjustment component further includes a positioning pin, which includes a pin body, a spring, and a positioning ball. The pin body is rotatably connected to the rotating seat, the spring is disposed within the pin body, and the positioning ball is connected to the outer end of the spring. A positioning groove is provided on the spherical hinge joint. When it is necessary to lock the angle of the nozzle assembly, the positioning ball is positioned in the positioning groove by rotating the pin body.

[0018] As an improvement to the above solution, the bottom end of the support bracket is provided with a movable wheel, and the movable wheel is provided with a brake.

[0019] Compared with existing technologies, the above solution has the following advantages or beneficial effects:

[0020] 1. By setting up multi-layer guide plates and microporous membranes, the liquid is broken down into fine particles during the spraying process. At the same time, the spiral groove in the diffuser further enhances the atomization effect, so that the foliar fertilizer can be evenly covered on the surface of tobacco leaves.

[0021] 2. The auxiliary airflow device enhances the diffusion ability of atomized particles by providing additional airflow, further improving the flexibility of the spraying range.

[0022] 3. The design of the lifting mechanism and angle adjustment mechanism allows the height and angle of the spraying unit to be flexibly adjusted to adapt to the height changes of tobacco plants at different growth stages, avoiding the problem of uneven foliar fertilizer coverage caused by insufficient spraying range.

[0023] 4. The stirring device and conical cavity inside the storage tank effectively reduce the accumulation of sediment in the liquid, ensuring uniform concentration of foliar fertilizer and improving fertilization effect.

[0024] 5. The overall structure is simple, easy to operate and maintain, and reduces the cost of using the equipment. Attached Figure Description

[0025] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0026] Figure 1 This is a schematic diagram of the structure of the tobacco foliar fertilizer sprayer in this embodiment. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of the tobacco foliar fertilizer sprayer in this embodiment. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the structure of the tobacco foliar fertilizer sprayer in this embodiment. Figure 3 ;

[0029] Figure 4 This is a partial enlarged view of the tobacco foliar fertilizer sprayer in this embodiment;

[0030] Figure 5 This is a partial structural diagram of the nozzle assembly involved in this embodiment;

[0031] Figure 6 This is a schematic diagram of the internal structure of the diffusion shroud involved in this embodiment;

[0032] Figure 7 This is a schematic diagram of the angle adjustment component involved in this embodiment.

[0033] In the diagram, 1. Support bracket; 2. Liquid storage tank; 3. Spraying mechanism; 4. Adjustment mechanism; 5. Nozzle assembly; 51. Nozzle tube; 52. Guide vane; 53. Guide channel; 54. Microporous membrane; 6. Atomization control assembly; 7. Diffuser; 71. Spiral groove; 8. Filter screen; 9. Stirring device; 91. Drive motor; 92. Stirring paddle; 10. Conical cavity; 11. Flow regulating valve; 12. Pressure pump; 13. Rotating screw; 14. Guide rod; 15. Slider; 16. Support arm; 17. Rotary seat; 19. Spherical hinge joint; 20. Positioning pin; 201. Pin body; 202. Spring; 203. Positioning ball; 21. Auxiliary airflow assembly; 22. Moving wheel; 23. Handwheel. Detailed Implementation

[0034] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present invention omits descriptions of well-known components and processing techniques and processes to avoid unnecessarily limiting the present invention. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] See Figure 1-4 This embodiment provides a tobacco foliar fertilizer sprayer, including a support bracket 1, a liquid storage tank 2, a spraying mechanism 3, and an adjustment mechanism 4.

[0036] The support frame 1 serves as the main support for the entire tobacco foliar fertilizer sprayer. A liquid storage tank 2 is fixedly installed on its top, and casters 22 are installed at its bottom, allowing the entire tobacco foliar fertilizer sprayer to move. The casters 22 are connected to the support frame 1 via bearings, and each caster 22 is equipped with a brake. The brake consists of a brake pad and an operating lever. The operating lever uses a lever principle to push the brake pad into contact with the caster 22, thereby achieving the braking function.

[0037] The storage tank 2 is equipped with a stirring device 9, which includes a drive motor 91 and a stirring paddle 92. The drive motor 91 is fixedly mounted on the top of the storage tank 2 and drives the stirring paddle 92 to rotate via a rotating shaft. The blades of the stirring paddle 92 are designed with an arc shape to reduce the accumulation of sediment in the liquid. The bottom of the storage tank 2 is designed as a conical cavity 10, and the bottom end of the conical cavity 10 is connected to a delivery pipeline (not shown in the figure) to ensure that the liquid can be fully discharged.

[0038] The spraying mechanism 3 is connected to the bottom of the liquid storage tank 2 via a delivery pipeline, and includes a nozzle assembly 5, an atomization control assembly 6, and an auxiliary airflow assembly 21.

[0039] The liquid storage tank 2 is connected to the nozzle assembly 5 via a delivery pipeline. (See also...) Figure 5 The nozzle assembly 5 includes a nozzle tube 51, within which multiple layers of guide vanes 52 are disposed. Guide vanes 52 have guide holes, forming guide channels 53 between them. Liquid flows from one guide channel 53 through the guide holes to the next guide channel 53. A microporous membrane 54 is disposed at the outlet of the nozzle tube 51. The microporous membrane 54 is used to decompose the liquid into fine particles, enhancing the atomization effect. A diffuser 7 is disposed at the outlet of the nozzle assembly 5. (See reference...) Figure 6 The inner wall of the diffuser 7 is provided with a spiral groove 71, which guides the liquid to flow out tangentially, thereby forming a vortex-shaped jet. A detachable filter screen 8 is also provided at the outlet of the diffuser 7. The filter screen 8 is connected to the diffuser 7 by a snap-fit, which facilitates cleaning and replacement.

[0040] The atomization control component 6 is installed on the delivery pipeline. The atomization control component 6 includes a flow regulating valve 11 and a pressure pump 12. The flow regulating valve 11 has an internal throttling orifice. The liquid flow rate is adjusted by rotating the adjusting knob to change the opening of the throttling orifice. The pressure pump 12 is connected to the flow regulating valve 11 and has an internal check valve to prevent liquid backflow. The pressure pump 12 pressurizes the liquid.

[0041] The auxiliary airflow assembly 21 includes a fan and an air duct (not shown in the figure). The fan is fixedly mounted on the support bracket 1, and one end of the air duct is connected to the fan while the other end extends to the outlet of the nozzle assembly 5. An adjustable nozzle is provided at the outlet of the air duct, which can adjust its opening size and direction to change the airflow intensity and direction.

[0042] The adjustment mechanism 4 includes a lifting assembly and an angle adjustment assembly. The lifting assembly includes a rotating screw 13 and a guide rod 14. The rotating screw 13 is vertically mounted on the left and right sides of the support bracket 1, and a handwheel 23 is provided on its top. The handwheel 23 is fixedly connected to the rotating screw 13 through a keyway. Alternatively, the handwheel 23 can be replaced by a motor, which drives the rotating screw 13 to rotate. A slider 15 is threadedly connected to the outer wall of the rotating screw 13. The slider 15 has a threaded hole inside and moves up and down along the rotating screw 13 through the threaded engagement. A lubrication groove is also provided inside the slider 15, filled with lubricating oil to reduce the friction between the slider 15 and the rotating screw 13. The guide rod 14 is parallel to the rotating screw 13 and passes through the slider 15, used to limit the rotational movement of the slider 15. A support arm 16 is fixedly connected to the inner side of the slider 15, and the other end of the support arm 16 is connected to the spraying mechanism 3.

[0043] The angle adjustment assembly includes a rotating base 17, which is fixedly mounted on the support arm 16. A spherical hinge joint 19 is disposed inside the rotating base 17, and the spherical hinge joint 19 is connected to the nozzle assembly 5 to achieve angle adjustment of the spray mechanism 3. (See reference...) Figure 7 The angle adjustment assembly also includes a positioning pin 20, which comprises a pin body 201, a spring 202, and a positioning ball 203. The pin body 201 is rotatably connected to the rotating seat 17, the spring 202 is disposed inside the pin body 201, and the positioning ball 203 is connected to the outer end of the spring 202. A positioning groove is provided on the spherical hinge joint 19. When it is necessary to lock the angle of the spray mechanism 3, the positioning ball 203 is positioned in the positioning groove by rotating the pin body 201; when it is necessary to adjust the angle, the positioning pin 20 is pressed to disengage the positioning ball 203 from the positioning groove, allowing the nozzle assembly 5 to rotate freely.

[0044] In actual use, the foliar fertilizer is first poured into the storage tank 2, and the stirring device 9 is started to mix the foliar fertilizer evenly. By simultaneously rotating the rotating screw 13 using the handwheels 23 on both sides, the slider 15 moves up and down along the guide rod 14, thereby adjusting the height of the spraying mechanism 3 to adapt to the height changes of tobacco plants at different growth stages. At the same time, the angle of the nozzle assembly 5 can be adjusted using the angle adjustment component to ensure that the spraying range covers the target area. The pressure pump 12 is started to pressurize the liquid, and the liquid flow rate is adjusted by the flow regulating valve 11. The liquid is broken down into fine particles by passing through the multi-layer guide plate 52 and microporous membrane 54 in the nozzle assembly 5, and then forms a vortex spray through the spiral groove 71 in the diffuser hood 7. The auxiliary airflow assembly 21 provides additional airflow to enhance the diffusion ability of the atomized particles, ultimately achieving a uniform atomization effect. After spraying, the sprayer is turned off, and the filter screen 8 is cleaned or replaced for the next use.

[0045] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0046] In practice, the foliar fertilizer is first poured into the storage tank 2. The stirring device 9 inside the storage tank 2 then starts, and the drive motor 91 rotates the stirring paddle 92 via a shaft. The arc-shaped blade design of the stirring paddle 92 effectively reduces the accumulation of sediment in the liquid, ensuring uniform mixing of the foliar fertilizer. The conical cavity 10 design allows the liquid to drain smoothly from the lowest point of the storage tank 2, avoiding residue. This step ensures the consistency of the foliar fertilizer concentration, laying the foundation for subsequent spraying effects.

[0047] Subsequently, rotating the rotating screw 13 via handwheel 23 causes the slider 15 to move up and down along the guide rod 14. The lubrication groove inside the slider 15 is filled with lubricating oil, significantly reducing friction with the rotating screw 13 and ensuring the smooth operation of the lifting assembly. The slider 15 is connected to the spraying mechanism 3 via support arm 16, thereby enabling height adjustment of the spraying mechanism 3. This design can flexibly adapt to changes in the height of tobacco plants at different growth stages, ensuring that the spraying range covers the target area. Once the height is adjusted to the correct position, the spraying angle can be further optimized using the angle adjustment assembly. Pressing the positioning pin 20 disengages the positioning ball 203 from the positioning groove of the spherical hinge joint 19, allowing the nozzle assembly 5 to rotate freely to the desired angle. Then, releasing the positioning pin 20 re-locks the angle position under the action of the spring 202.

[0048] Next, the pressure pump 12 is activated to pressurize the liquid. The pressure pump 12 pushes the liquid to the flow regulating valve 11. The opening of the throttling orifice inside the flow regulating valve 11 can be adjusted by rotating the adjusting knob, thereby changing the liquid flow rate. The liquid then enters the nozzle assembly 5, passes through the guide channel 53 formed by the multi-layer guide vanes 52, and is finally broken down into fine particles by the microporous membrane 54. The design of the microporous membrane 54 makes the liquid atomized particle size more uniform, improving the absorption efficiency of the foliar fertilizer. The spiral groove 71 on the inner wall of the diffuser 7 guides the liquid to flow out tangentially, forming a vortex-shaped spray, further enhancing the atomization effect. The filter screen 8 at the outlet of the diffuser 7 intercepts incompletely atomized particles, ensuring the spraying quality. This step achieves uniform coverage of the foliar fertilizer through a multi-stage atomization design.

[0049] Simultaneously, the auxiliary airflow assembly 21 is activated, and the airflow generated by the fan is delivered to the outlet of the nozzle assembly 5 through the air duct. The adjusting nozzle at the outlet of the air duct can change the airflow intensity and direction, further enhancing the diffusion ability of the atomized particles. This design not only expands the spraying range but also increases the suspension time of the atomized particles in the air, making them easier to adhere to the surface of tobacco leaves.

[0050] After spraying, turn off the sprayer and clean or replace the filter screen 8. The filter screen 8 is connected to the diffuser hood 7 by clips, making it easy to disassemble and maintain. In addition, the stirring device 9 in the storage tank 2 can be restarted before the next use to ensure that the foliar fertilizer is always kept in a uniform state.

[0051] Through the above steps, this utility model achieves uniform atomized spraying of foliar fertilizer. The combined design of the multi-layer guide plate 52 and the microporous membrane 54, combined with the spiral groove 71 structure of the diffuser 7, ensures that the atomized particles are fine and uniform; the cooperation of the lifting component and the angle adjustment component solves the problem of insufficient flexibility in the spraying range; the introduction of the auxiliary airflow component 21 further improves the spraying effect. The overall structure is simple, the connection relationship between the components is clear, it is easy to operate and maintain, and significantly reduces the usage cost of the sprayer in this embodiment. The above embodiments describe in detail the specific application scenarios and operating principles of this utility model, ensuring that those skilled in the art can successfully implement this technical solution according to the contents of the specification.

[0052] Although the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the utility model. Based on the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the utility model.

Claims

1. A tobacco foliar fertilizer sprayer, characterized in that: It includes a support bracket (1), a liquid storage tank (2), a spraying mechanism (3) and an adjusting mechanism (4). The liquid storage tank (2) is equipped with a stirring device (9). The liquid storage tank (2) is installed on the top of the support bracket (1) and communicates with the spraying mechanism (3). The adjustment mechanism (4) includes a lifting assembly and an angle adjustment assembly. The spraying mechanism (3) includes a nozzle assembly (5). The lifting assembly includes a rotating screw (13) and a slider (15). The rotating screw (13) is connected to the support bracket (1). The slider (15) is threadedly connected to the rotating screw (13). The angle adjustment assembly includes a rotating seat (17) and a ball joint (19). The rotating seat (17) is connected to the slider (15). The nozzle assembly (5) is movably connected to the rotating seat (17) through the ball joint (19). The slider (15) moves up and down with the rotation of the rotating screw (13), thereby adjusting the height of the nozzle assembly (5) and adjusting the spray angle of the nozzle assembly (5) through the ball joint (19).

2. The tobacco foliar fertilizer sprayer according to claim 1, characterized in that: The nozzle assembly (5) includes a nozzle tube (51), and a multi-layer flow guide plate (52) is provided inside the nozzle tube (51). The flow guide plate (52) has flow guide holes, and a flow guide channel (53) is formed between the flow guide plates (52). A microporous membrane (54) is provided at the outlet of the nozzle tube (51). The nozzle assembly (5) is connected to a diffuser hood (7) at its outlet, and a filter screen (8) is placed at the outlet of the diffuser hood (7). The spraying mechanism (3) further includes an atomization control component (6). The nozzle assembly (5) is connected to the liquid storage tank (2) through a delivery pipeline equipped with the atomization control component (6). The atomization control component (6) includes a flow regulating valve (11) and a pressure pump (12).

3. A tobacco foliar fertilizer sprayer according to claim 2, characterized in that: The spraying mechanism (3) also includes an auxiliary airflow assembly (21), which includes a fan and a duct. One end of the duct is connected to the fan, and the other end extends to the outlet of the nozzle assembly (5). An adjustable nozzle is provided at the outlet end of the duct.

4. A tobacco foliar fertilizer sprayer according to claim 2, characterized in that: The inner wall of the diffuser (7) is provided with a spiral groove (71) to guide the liquid to flow out in the tangential direction.

5. A tobacco foliar fertilizer sprayer according to claim 1, characterized in that: The stirring device (9) includes a drive motor (91) and a stirring paddle (92). The drive motor (91) is fixedly installed on the top of the liquid storage tank (2) and drives the stirring paddle (92) to rotate through a rotating shaft.

6. A tobacco foliar fertilizer sprayer according to claim 5, characterized in that: The blades of the stirring paddle (92) are arc-shaped.

7. A tobacco foliar fertilizer sprayer according to claim 1, characterized in that: The lifting assembly also includes a handwheel (23) and a guide rod (14). The rotating screw (13) is vertically installed on the left and right sides of the bearing bracket (1), and a handwheel (23) is provided on its top. The handwheel (23) is fixedly connected to the rotating screw (13). The guide rod (14) is parallel to the rotating screw (13) and passes through the slider (15).

8. A tobacco foliar fertilizer sprayer according to claim 7, characterized in that: The inner side of the slider (15) is fixedly connected to a support arm (16), and the rotating seat (17) is fixedly connected to the support arm (16).

9. A tobacco foliar fertilizer sprayer according to claim 1, characterized in that: The angle adjustment assembly also includes a positioning pin (20), which includes a pin body (201), a spring (202) and a positioning ball (203). The pin body (201) is rotatably connected to the rotating seat (17), the spring (202) is disposed inside the pin body (201), and the positioning ball (203) is connected to the outer end of the spring (202). The spherical hinge joint (19) is provided with a positioning groove. When it is necessary to lock the angle of the nozzle assembly (5), the positioning ball (203) is positioned in the positioning groove by rotating the pin (201).

10. A tobacco foliar fertilizer sprayer according to claim 1, characterized in that: The bottom end of the support bracket (1) is provided with a movable wheel (22), and the movable wheel (22) is provided with a brake.

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