Spraying device and plant protection unmanned equipment

Abstract

The utility model provides a kind of spraying device, including boost fan, and centrifugal nozzle and air guide device all fixed at the air outlet of boost fan, centrifugal nozzle and air guide device coaxial arrangement, the injection end of centrifugal nozzle is stretched from air guide device;Air guide device includes the outer air guide wall of flared shape, and multiple inner air guide walls, multiple inner air guide walls are arranged in the outer periphery of centrifugal nozzle, outer air guide wall is arranged in the outer periphery of multiple inner air guide walls, and first air guide cavity is formed with the air outlet of boost fan and is communicated between the two, first air guide cavity acts on the injection end of centrifugal nozzle.The spraying device can improve the penetration and atomization coverage area of mist droplet, make mist droplet more evenly distributed under the action of wind field, can adapt to different height, density of crop, enhance the flexibility of spraying device improve the precision and uniformity of spraying, realize more accurate, efficient spraying.

Description

Technical Field

[0001] This utility model relates to the field of agricultural equipment technology, and in particular to a spraying device and a plant protection drone. Background Technology

[0002] In agricultural production, precise, efficient, and uniform pesticide spraying for crops of different heights, densities, and leaf and fruit sizes is a key step in ensuring healthy crop growth and improving yield and quality. It is also an important measure to reduce pesticide waste and environmental pollution.

[0003] Currently, the most widely used pesticide spraying equipment on the market mainly includes pressure sprayers and centrifugal nozzle fan sprayers. However, these devices have significant technical limitations in actual operation: on the one hand, their atomization ability is constrained by their structural design, making it difficult to produce fine droplets suitable for the needs of various crops; on the other hand, for centrifugal nozzle fan sprayers, the wind conditions provided by the fan are limited by wind speed, wind pressure, and their own size and structure, making it impossible to create an airflow environment with wide coverage and suitable intensity. More importantly, it is difficult to precisely match the atomization degree of the centrifugal nozzle with the wind field provided by the fan, resulting in a limited range of atomization particle size control, making it impossible to dynamically adjust according to crop characteristics (such as the deep penetration requirements of tall crops, the uniform coverage requirements of dense crops, and the fine adhesion requirements of small-leaved crops).

[0004] The aforementioned problems directly result in a severe lack of precision and flexibility in spraying operations when dealing with different types of crops: for high-density or tall crops, the droplets lack sufficient penetration and are difficult to reach the lower and middle leaves and hidden fruits; for low-growing and sparse crops, the droplet coverage area is limited and unevenly distributed; for crops with significant differences in leaf and fruit morphology, it is impossible to achieve targeted adhesion of the droplets, ultimately failing to achieve the goal of precise and uniform spraying, thus hindering the improvement of agricultural production efficiency and the development of green agriculture. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a spraying device, including a booster fan, a centrifugal nozzle and a guide device both fixed at the air outlet of the booster fan, the centrifugal nozzle and the guide device being coaxially arranged, the spraying end of the centrifugal nozzle extending out of the guide device; the guide device includes a trumpet-shaped outer guide wall and a plurality of inner guide walls, the plurality of inner guide walls being arranged around the centrifugal nozzle, the outer guide wall being arranged around the plurality of inner guide walls, and a first guide cavity communicating with the air outlet of the booster fan being formed between the two, the first guide cavity acting on the spraying end of the centrifugal nozzle.

[0006] Furthermore, the inner air guide wall includes a first inner air guide wall and a second inner air guide wall, with the first air guide wall and the second air guide wall spaced apart, and the height of the first air guide wall being greater than that of the second air guide wall.

[0007] Preferably, the flared opening of the outer air guide wall is elliptical, the first inner air guide wall is located inside the long axis of the outer air guide wall, and the second inner air guide wall is located inside the short axis of the outer air guide wall.

[0008] Furthermore, a second air guide cavity is formed between the inner air guide wall and the centrifugal nozzle, which is connected to the outlet of the booster fan and acts on the spray end of the centrifugal nozzle. The air field in the second air guide cavity is different from the air field in the first air guide cavity.

[0009] Preferably, the inner air guide wall is detachably disposed on the outer periphery of the centrifugal nozzle to adjust the angle of the inner air guide wall and / or its distance from the central axis.

[0010] Furthermore, the external air guide wall is detachably installed at the air outlet of the booster fan.

[0011] Preferably, the air outlet of the booster fan is provided with multiple axial guide vanes.

[0012] This utility model also provides an unmanned vehicle, including the spraying device described above.

[0013] As described above, the spraying device and the plant protection unmanned equipment with the spraying device involved in this utility model improve the penetration and atomization coverage of the droplets by guiding and optimizing the airflow generated by the booster fan, making the droplets more evenly distributed under the action of the wind field, adapting to crops of different heights and densities, enhancing the flexibility of the spraying device, improving the accuracy and uniformity of spraying, and achieving more precise and efficient spraying. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the spraying device of this utility model;

[0015] Figure 2 for Figure 1 Exploded view;

[0016] Figure 3 for Figure 1 The front view;

[0017] Figure 4 for Figure 1 A sectional view;

[0018] Figure 5 This is a cross-sectional view of one embodiment.

[0019] Component designation explanation

[0020] 1 booster fan

[0021] 11 Axial guide vanes

[0022] 2 External air guide wall

[0023] 3. Internal air guide wall

[0024] 31 First Inner Air Guide Wall

[0025] 32 Second Inner Air Guide Wall

[0026] 33 First air guide cavity

[0027] 34 Second air guide cavity

[0028] 4 Centrifugal nozzles Detailed Implementation

[0029] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0030] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0031] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0032] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0033] like Figure 1 and Figure 2 As shown, this utility model provides a spraying device, including a booster fan 1, a centrifugal nozzle 4, and an air guide device. The booster fan 1 provides basic airflow power for the spraying system, providing the source for the formation of the wind field. The centrifugal nozzle 4 and the air guide device are both fixed at the air outlet of the booster fan 1, and the centrifugal nozzle 4 and the air guide device are coaxially arranged. The spray tip of the centrifugal nozzle 4 extends from the air guide device, allowing the droplets sprayed from the centrifugal nozzle 4 to directly enter the wind field guided by the air guide device, ensuring the effective effect of the wind field on the droplets.

[0034] like Figure 4 As shown, the air guiding device includes a trumpet-shaped outer air guiding wall 2 and multiple inner air guiding walls 3. The multiple inner air guiding walls 3 are arranged around the periphery of the centrifugal nozzle 4, and the outer air guiding wall 2 is arranged around the periphery of the multiple inner air guiding walls 3. It is used to adjust the angle of the inner air guiding walls 3 and / or their distance from the central axis. A first air guiding cavity 33 is formed between the outer air guiding wall 2 and the inner air guiding walls 3. The first air guiding cavity 33 is connected to the air outlet of the booster fan 1. It can guide part of the airflow generated by the booster fan 1 to the spray end of the centrifugal nozzle 4, which acts on the droplets sprayed from the spray end, enhances the kinetic energy of the droplets, and improves their penetration.

[0035] Furthermore, in this utility model, the inner air guide wall 3 preferably includes a first inner air guide wall 31 and a second inner air guide wall 32, which are spaced apart, and the height of the first inner air guide wall 31 is greater than the height of the second inner air guide wall 32. In this example, there are preferably two of each of the first inner air guide wall 31 and the second inner air guide wall 32.

[0036] Furthermore, to better guide the airflow by adapting to the inner guide wall 3, the flared opening of the outer guide wall 2 is preferably elliptical, with the first inner guide wall 31 positioned inside the long axis of the outer guide wall 2 and the second inner guide wall 32 positioned inside the short axis of the outer guide wall 2. This structure allows the first guide cavity 33 to form airflow fields of different intensities in different directions. In the long axis direction, due to the height of the first inner guide wall 31, the airflow is more strongly guided, resulting in a stronger airflow suitable for spraying tall, dense crops and improving the deep penetration capability of the mist droplets. In the short axis direction, the airflow is relatively weaker, suitable for spraying short, sparse crops and preventing excessive drift of the mist droplets.

[0037] like Figure 3 As shown, in one embodiment, two first inner air guide walls 31 are respectively positioned above and below the centrifugal nozzle 4, and two second inner air guide walls 32 are respectively positioned to the left and right of the centrifugal nozzle 4. The outer air guide wall 2 is also adaptively adjusted according to the inner air guide walls 3, that is, the upper and lower openings of the outer air guide wall 2 are larger than the left and right openings. The position and the structure with the upper and lower openings larger than the left and right openings prioritize strengthening the airflow intensity in the upper and lower directions, which can adapt to the deep penetration requirements of tall crops.

[0038] Furthermore, such as Figure 5 As shown, in this invention, the wind field can be adjusted by adjusting the position or angle of the inner air guide wall 3, thus forming wind directions at different angles. Specifically, the inner air guide wall 3 is fixedly installed on the outer periphery of the centrifugal nozzle 4, with a certain space between the inner air guide wall 3 and the centrifugal nozzle 4, forming a second air guide cavity 34. The second air guide cavity 34 is connected to the air outlet of the booster fan 1, which can guide another part of the airflow generated by the booster fan 1 to the spray end of the centrifugal nozzle 4, and the wind field in the second air guide cavity 34 is different from the wind field in the first air guide cavity 33. By adjusting the position of the inner air guide wall 3 relative to the center, or by adjusting the angle of the inner air guide wall 3, the angle of the wind field relative to the axis can be adjusted. When the inner air guide wall 3 is moved away from the centrifugal nozzle 4, an airflow field will be formed in the second air guide cavity 34, and the airflow field formed will also change with changes in position, angle, or height. Two airflow fields will be formed in the vertical direction, and the two airflow fields formed will also change with changes in position, angle, and height. In this way, the droplets can be affected by airflow from different directions, thus dispersing more evenly, improving the atomization coverage area and uniformity. During a single spraying process, the droplets can adhere better to crops with leaves and fruits of different sizes.

[0039] Furthermore, to adapt to more operational scenarios and better adjust the spraying angle during use for precise spraying, the inner air guide wall 3 is preferably detachably mounted on the outer periphery of the centrifugal nozzle 4. Simultaneously, multiple mounting positions are preferably provided on the outside of the centrifugal nozzle 4 to allow for adjustment of the position and angle of the inner air guide wall 3. When spraying different types of crops, the position and angle of the inner air guide wall 3 can be easily adjusted to suit the required spraying height or angle. In addition, the distribution of the airflow can be adjusted by replacing the inner air guide wall 3 with one of different height, shape, or structure, further improving the adaptability of the device. By adjusting the position (distance from the axis), angle (angle relative to the axis), height, or shape of the inner air guide wall 3, the direction and intensity of the airflow in the left-right and up-down directions can be adjusted. It should be noted that the inner air guide wall 3 can be connected by snap-fit ​​or threaded connections, but this invention is not limited to these methods; any method that allows for detachable connection is included within the scope of protection of this invention.

[0040] Preferably, in this invention, the outer wind guide wall 2 is detachably installed at the air outlet of the booster fan 1, and can be adapted to crops of different shapes, such as tall, short, dense, and sparse, by replacing the outer wind guide wall 2 with different specifications. It should be noted that the outer wind guide wall 2 can be connected by means of snap-fit ​​connection, threaded connection, etc., but this invention is not limited to these methods, and any method that can achieve detachable connection is included within the protection scope of this invention.

[0041] In actual operation, the booster fan 1 delivers air to the outlet by rotating its blades, resulting in a circumferential rotational speed. To eliminate this speed, multiple axial guide vanes 11 are preferably installed at the outlet of the booster fan 1. These vanes have a certain width to form a guiding surface that directs the airflow. When the air passes through the guide vanes, the guiding surface guides the air, eliminating residual circumferential velocity, enhancing axial flow, and rectifying the airflow. This ensures a more stable and uniform airflow into the first and second guide chambers 33 and 34, guaranteeing the stability of the airflow and facilitating the stable delivery and distribution of droplets. When the corrected airflow effectively combines with the mist sprayed from the centrifugal nozzle 4, a new mist stream is formed. This corrected mist stream allows for more effective and precise spraying of crops.

[0042] In practice, after the airflow is output by the fan, it first passes through the axial guide vanes 11 for rectification, eliminating circumferential disturbances and enhancing axial flow. Then, the airflow enters the first guide cavity 33 and the second guide cavity 34, acting on the end of the centrifugal nozzle 4, thereby changing the spray direction of the liquid. When the target crop is a low-growing, sparse crop, such as vegetables or strawberries, the inner guide wall 3 is adjusted to a position closer to the axis and at a slightly horizontal angle to ensure uniform airflow diffusion in both left-right and up-down directions, expanding the droplet coverage area and ensuring uniform adhesion to the ground and low-growing leaves. When the target crop is a dense fruit tree, such as apples or citrus, the inner guide wall 3 can be adjusted to a position farther from the axis, forming multiple stratified airflows. This allows the droplets to cover the outer layer of the canopy and penetrate the gaps between branches and leaves to reach the hidden fruit. Furthermore, the relative angle between the inner guide wall 3 and the axis can be adjusted for more precise wind field control.

[0043] This utility model also provides an unmanned agricultural plant protection device equipped with multiple spraying devices as described above. These spraying devices can be arranged and combined according to operational needs to improve the spraying range and efficiency. By adjusting the position, angle, or structure of the inner air guide wall 3 within the spraying device, adjustable control of the wind field can be achieved. This allows for efficient combination of the atomized particles from the centrifugal nozzle 4 with the adjusted wind field, enabling rapid switching between different crop scenarios, improving the efficiency of agricultural plant protection operations, and achieving efficient and precise pesticide spraying for different crops.

[0044] In summary, this utility model effectively solves the technical bottlenecks of existing spraying equipment, provides an efficient solution for precision plant protection of diverse crops, and effectively overcomes the various shortcomings of existing technologies, thus possessing high industrial application value.

[0045] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A spraying device, characterized in that, It includes a booster fan, and centrifugal nozzles and air guide devices fixed at the air outlet of the booster fan. The centrifugal nozzles and air guide devices are coaxially arranged, and the spray tip of the centrifugal nozzles extends out of the air guide devices. The air guiding device includes a trumpet-shaped outer air guiding wall and a plurality of inner air guiding walls. The plurality of inner air guiding walls are arranged around the centrifugal nozzle. The outer air guiding wall is arranged around the plurality of inner air guiding walls, and a first air guiding cavity is formed between the two, which communicates with the air outlet of the booster fan. The first air guiding cavity acts on the spray end of the centrifugal nozzle. The inner air guide wall includes a first inner air guide wall and a second inner air guide wall, which are spaced apart. The height of the first inner air guide wall is greater than that of the second inner air guide wall.

2. The spraying device according to claim 1, characterized in that: The inner air guide wall includes two first inner air guide walls and two second inner air guide walls.

3. The spraying device according to claim 2, characterized in that: The outer air guide wall has an elliptical opening. The first inner air guide wall is located inside the long axis of the outer air guide wall, and the second inner air guide wall is located inside the short axis of the outer air guide wall.

4. The spraying device according to claim 1, characterized in that: A second air guide cavity is formed between the inner air guide wall and the centrifugal nozzle, which is connected to the outlet of the booster fan and acts on the spray end of the centrifugal nozzle. The air field in the second air guide cavity is different from the air field in the first air guide cavity.

5. The spraying device according to claim 1, characterized in that: The inner air guide wall is detachably disposed on the outer periphery of the centrifugal nozzle and is used to adjust the angle of the inner air guide wall and / or its distance from the central axis.

6. The spraying device according to claim 1, characterized in that: The external air guide wall is detachably installed at the air outlet of the booster fan.

7. The spraying device according to claim 1, characterized in that: The booster fan has multiple axial guide vanes at its air outlet.

8. An unmanned plant protection device, characterized in that: It includes a plurality of spraying devices as described in any one of claims 1 to 7.

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