Small agricultural unmanned aerial vehicle pesticide spraying atomization structure

Abstract

The utility model relates to agricultural unmanned plane technical field discloses small -size agricultural unmanned plane pesticide spraying atomization structure, including the outer tube, the inner tube is vertically slid in the outer tube inside, the reset spring is fixedly connected between the inner tube upper end and the outer tube inner top, the atomization head is fixedly arranged in the inner tube lower extreme, the outer tube includes the outer fixed tube, the through groove is set up in the inner tube and includes the inner sliding tube, the inner sliding tube upper end is sealed, the through mouth is passed in and is set up in the inner sliding tube close upper extreme position department. In the utility model, need not additional drive arrangement, utilize pesticide pressure and spring force to realize atomization head automatic telescopic: when spraying, the shortening distance is stretched out to the crop distance, and the adhesion rate is improved, when not spraying, the anti -collision is withdrawn, and the safety of unmanned plane is guaranteed. Simple and reliable structure, adapt to unmanned plane light weight demand, reduce cost and failure risk.

Description

Technical Field

[0001] This utility model relates to the field of agricultural drone technology, and in particular to a pesticide spraying atomization structure for small agricultural drones. Background Technology

[0002] With the acceleration of agricultural modernization, small agricultural drones have been widely used in pesticide spraying, offering advantages such as high operational efficiency, strong adaptability, and reduced manual contact with pesticides. In drone pesticide spraying systems, the atomization structure is one of the core components, and its performance directly affects the uniformity, adhesion rate, and overall effectiveness of pesticide spraying.

[0003] In existing technologies, the pesticide spraying atomization structure of agricultural drones typically adopts a fixed installation method, meaning the atomizing head is fixed in position relative to the drone body. This structure presents the following problems in practical applications: Firstly, to ensure spraying range and effectiveness, the atomizing head needs to extend a certain distance beyond the drone body. This makes the atomizing structure prone to collisions with external objects and damage when the drone is not in operation (such as during relocation, storage, or flight). Secondly, while retracting the atomizing head into the drone body avoids collisions, the atomizing head remains far from the crop during spraying. This causes pesticide droplets to drift due to airflow during descent, reducing spraying accuracy and utilization, while also increasing pesticide waste and environmental pollution risks.

[0004] Therefore, those skilled in the art have provided a pesticide spraying atomization structure for small agricultural drones to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a small agricultural drone pesticide spraying atomization structure. This structure requires no additional drive device and utilizes pesticide pressure and spring force to automatically extend and retract the atomizing head: during spraying, it extends to shorten the distance to the crop, improving adhesion; during non-spraying, it retracts to prevent collisions and ensure drone safety. The structure is simple and reliable, adapts to the lightweight requirements of drones, and reduces costs and the risk of malfunction.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A pesticide spraying atomizing structure for a small agricultural drone includes an outer tube, an inner tube that is vertically slidably disposed inside the outer tube, a return spring that is fixedly connected between the upper end of the inner tube and the top of the inner tube, and an atomizing head that is fixedly disposed at the lower end of the inner tube. The outer tube includes an outer fixed tube, and a flow groove is provided inside the outer fixed tube near the lower end. The inner tube includes an inner sliding tube, the upper end of which is sealed, and a flow port is provided through the inner sliding tube near the upper end.

[0007] Furthermore, an inner connecting ring is fixedly installed at the top end of the outer fixed tube, the upper end of the reset spring is fixedly connected to the inner connecting ring, and the lower end of the reset spring is fixedly connected to the upper end of the inner sliding tube.

[0008] Furthermore, the flow channel is arranged circumferentially along the inner wall of the outer fixed tube, and the flow port is arranged circumferentially along the inner sliding tube. When the inner tube slides downward, the flow port and the flow channel form an annular connecting channel.

[0009] Furthermore, the inner sliding tube and the outer fixed tube are in clearance fit, and the size of the clearance is sufficient to allow the inner sliding tube to slide smoothly inside the outer fixed tube, and to maintain the retracted state of the inner tube when not in operation.

[0010] This utility model has the following beneficial effects: 1. The pesticide spraying atomization structure for small agricultural drones proposed in this utility model, through the inclusion of an inner tube that can slide within the outer tube and a return spring, achieves the function of automatically extending the atomizing head during spraying and automatically retracting it during non-spraying. During spraying, the inner tube drives the atomizing head to extend downwards, shortening the distance to the crop, reducing the drift time of pesticide droplets in the air, and improving pesticide adhesion rate and spraying accuracy; during non-spraying, the inner tube retracts into the outer tube under the action of the return spring, avoiding collisions between the atomizing structure and external objects, ensuring the safe operation of the drone, and extending the service life of the equipment.

[0011] 2. The pesticide spraying atomization structure for small agricultural drones proposed in this utility model can realize the telescopic function of the atomizing head with only the cooperation of a simple structure such as an outer tube, an inner tube, and a return spring. No additional drive device is required. This not only simplifies the overall structure and reduces manufacturing costs, but also reduces failure points and improves the working reliability in complex agricultural environments. It is also more suitable for the requirements of small agricultural drones for lightweight and low energy consumption. Attached Figure Description

[0012] Figure 1 This is an axonometric view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional schematic diagram of the outer tube of this utility model; Figure 4 This is an axial side view of the inner tube of this utility model.

[0013] Legend: 1. Outer tube; 2. Inner tube; 3. Atomizing head; 4. Return spring; 101. Outer fixed tube; 102. Inner connecting ring; 103. Flow groove; 201. Inner sliding tube; 202. Flow port. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Reference Figures 1-4 One embodiment provided by this utility model: The pesticide spraying atomization structure of a small agricultural drone includes an outer tube 1, an inner tube 2 vertically sliding inside the outer tube 1, a return spring 4 fixedly connected between the upper end of the inner tube 2 and the top of the inner tube 1, and an atomizing head 3 fixedly installed at the lower end of the inner tube 2; the outer tube 1 includes an outer fixed tube 101, a flow groove 103 is opened near the lower end of the outer fixed tube 101, and the inner tube 2 includes an inner sliding tube 201, the upper end of the inner sliding tube 201 is sealed, and a flow port 202 is opened through the inner sliding tube 201 near the upper end; Specifically, the sliding engagement of the inner tube 2 within the outer tube 1, combined with the interaction between the elastic force of the return spring 4 and the pesticide delivery pressure, enables the extension and retraction of the inner tube 2 and the control of the pesticide passage opening and closing. When the pesticide pressure exceeds the elastic force of the return spring 4, the inner tube 2 slides downward, connecting the flow port 202 with the flow groove 103, allowing the pesticide to enter the inner tube 2 and be sprayed out through the atomizing head 3. When the pesticide pressure disappears, the return spring 4 drives the inner tube 2 to return to its original position, displacing the flow port 202 from the flow groove 103, thus closing the pesticide passage. By utilizing the synergistic effect of the mechanical structure and fluid pressure, the automatic extension and retraction of the atomizing head 3 and the synchronous control of the pesticide passage can be achieved without additional control components. The structure is compact and responsive, adapting to the dynamic needs of drone pesticide spraying operations.

[0016] An inner connecting ring 102 is fixedly installed at the top end of the outer fixed tube 101. The upper end of the reset spring 4 is fixedly connected to the inner connecting ring 102, and the lower end of the reset spring 4 is fixedly connected to the upper end of the inner sliding tube 201. Specifically, the inner connecting ring 102 provides a stable upper fixed fulcrum for the return spring 4, and the upper end of the inner sliding tube 201 serves as the lower fixed fulcrum, ensuring that the return spring 4 maintains an axial force state during extension and retraction, and that the direction of the spring force is consistent with the sliding direction of the inner tube 2. The spring force parameters of the return spring 4 are matched and designed so that its initial preload can reliably maintain the retracted state of the inner tube 2 when there is no pesticide pressure, and when the pesticide pressure reaches the normal pressure range required for spraying operations, it can be easily overcome to push the inner tube 2 down. The inner connecting ring 102 achieves stable installation of the return spring 4, preventing the spring from shifting or jamming during the force process, and ensuring the stability and reliability of the extension and retraction of the inner tube 2. The matching design of the spring force and the pesticide working pressure ensures the reliability of the retraction of the inner tube 2 in the non-operational state and the timeliness of the extension action in the operational state.

[0017] The inner sliding tube 201 and the outer fixed tube 101 are in clearance fit. The size of the clearance is sufficient to allow the inner sliding tube 201 to slide smoothly in the outer fixed tube 101 and to keep the inner tube 2 in the retracted state when not in operation. The flow groove 103 is arranged circumferentially along the inner wall of the outer fixed tube 101, and the flow port 202 is arranged circumferentially along the inner sliding tube 201. When the inner tube 2 slides downward, the flow port 202 and the flow groove 103 form an annular connecting channel. Specifically, the gap between the inner sliding tube 201 and the outer fixed tube 101 ensures smooth sliding of the inner tube 2, reduces frictional resistance, and limits radial swaying of the inner tube 2 in the non-working state through the cooperation of the small gap. Combined with the preload of the return spring 4, this maintains the stable retracted state of the inner tube 2. The circumferentially corresponding arrangement of the flow groove 103 and the flow port 202 forms an annular channel when they are connected, increasing the pesticide flow cross-sectional area, reducing fluid resistance, and ensuring that the pesticide can enter the inner tube 2 evenly and smoothly. The reasonable gap arrangement balances the flexibility of the inner tube 2's sliding and the stability of its retracted state, avoiding swaying of the inner tube 2 due to excessive gap or sliding jamming due to excessive gap. The annular connecting channel design improves pesticide flow efficiency, reduces local pressure loss, and helps ensure a stable and consistent atomization effect of the atomizing head 3.

[0018] Working principle: When the drone sprays pesticides, the pesticide is delivered to the inner cavity of the outer tube 1 through the outer fixed tube 101. At this time, the pesticide pressure acts on the upper end of the inner sliding tube 201 of the inner tube 2, generating a downward thrust. When this thrust is greater than the elastic force of the return spring 4, the inner tube 2 overcomes the spring force and slides vertically downward along the inner wall of the outer tube 1 until the flow port 202 on the inner sliding tube 201 aligns and connects with the flow groove 103 on the outer fixed tube 101. The pesticide enters the inner sliding tube 201 through the flow groove 103 and the flow port 202 in sequence, and is finally atomized and sprayed out through the atomizing head 3 at the lower end. At this time, the atomizing head 3 extends outside the outer tube 1, close to the crop area to improve the spraying effect. When the pesticide spraying stops, the pesticide pressure in the outer tube 1 disappears, and the elastic force of the return spring 4 pushes the inner tube 2 to slide upward and reset, causing the flow port 202 to be misaligned and disconnected from the flow groove 103, and the pesticide delivery path is cut off. At the same time, the inner tube 2 retracts entirely into the outer tube 1, and the atomizing head 3 retracts accordingly, avoiding interference with the normal operation of the drone.

[0019] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pesticide spraying atomizing structure for small agricultural drones, comprising an outer tube (1), characterized in that: An inner tube (2) is vertically slidably arranged inside the outer tube (1). A return spring (4) is fixedly connected between the upper end of the inner tube (2) and the top of the outer tube (1). An atomizing head (3) is fixedly arranged at the lower end of the inner tube (2). The outer tube (1) includes an outer fixed tube (101), and a flow groove (103) is provided inside the outer fixed tube (101) near the lower end. The inner tube (2) includes an inner sliding tube (201), the upper end of the inner sliding tube (201) is sealed, and a flow port (202) is provided through the inner sliding tube (201) near the upper end.

2. The pesticide spraying atomization structure of the small agricultural drone according to claim 1, characterized in that: An inner connecting ring (102) is fixedly installed at the top end of the outer fixed tube (101), the upper end of the reset spring (4) is fixedly connected to the inner connecting ring (102), and the lower end of the reset spring (4) is fixedly connected to the upper end of the inner sliding tube (201).

3. The pesticide spraying atomization structure of the small agricultural drone according to claim 1, characterized in that: The flow channel (103) is arranged circumferentially along the inner wall of the outer fixed tube (101), and the flow port (202) is arranged circumferentially along the inner sliding tube (201). When the inner tube (2) slides downward, the flow port (202) and the flow channel (103) form an annular connecting channel.

4. The pesticide spraying atomization structure of the small agricultural drone according to claim 1, characterized in that: The inner sliding tube (201) and the outer fixed tube (101) are in clearance fit. The size of the clearance is sufficient to allow the inner sliding tube (201) to slide smoothly inside the outer fixed tube (101) and to keep the inner tube (2) in a retracted state when not in operation.

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