A unmanned aerial vehicle cleaning swing arm device with adjustable water spraying width

Abstract

The utility model relates to unmanned plane technical field discloses a unmanned plane cleaning swing arm device of adjustable water spraying width, include: unmanned plane main part, centrifugal atomization mechanism, pneumatic diffusion mechanism and adjusting mechanism, wherein, centrifugal atomization mechanism is used to form primary atomization flow, pneumatic diffusion mechanism is used to produce high -speed injection current, and injection current mixes, accelerates with primary atomization flow in pneumatic diffusion mechanism, forms atomization diffusion flow, the water inlet end of adjusting mechanism is used for connecting high -pressure water source, and the water outlet end of adjusting mechanism is connected respectively to the water inlet end of centrifugal atomization mechanism and pneumatic diffusion mechanism, is used for adjusting the water flow proportion of distribution to centrifugal atomization mechanism and pneumatic diffusion mechanism, and changes atomization density further. The utility model sprays the atomization water of gentleness through the structure design, and this cleaning mode reduces the potential risk of vulnerable surface such as photovoltaic panel coating, high -grade building curtain wall to damage, and the effect is especially excellent under the scene needing to spray liquid atomization.

Description

Technical Field

[0001] This utility model relates to the field of drone technology, and in particular to a drone cleaning arm device with adjustable water spray width. Background Technology

[0002] With the acceleration of urbanization and the expansion of building scale, the demand for high-altitude cleaning operations is increasing. Drone cleaning technology, with its advantages of high flexibility, good safety and high operation efficiency, has been widely used in high-altitude operation fields such as building exterior wall cleaning, photovoltaic panel cleaning, bridge maintenance and power facility inspection. The efficient spraying cleaning mechanism, as the core component of the drone cleaning system, directly determines the cleaning effect, operation efficiency and resource utilization.

[0003] However, existing drone cleaning devices generally suffer from problems such as unadjustable spray coverage width, uneven distribution of atomized particles, and inability to dynamically adapt cleaning intensity. Traditional cleaning mechanisms mostly use fixed nozzle designs, which cannot adjust spray parameters in real time according to factors such as the material characteristics of the object being cleaned, the degree of dirt, and the drone's flight speed. This results in low cleaning efficiency and serious waste of water resources. The root cause is the lack of a precise control mechanism for the atomization and diffusion process of water flow, which makes it impossible to achieve intelligent adjustment of spray width and particle density. As a result, cleaning operations often require frequent manual intervention, making it difficult to meet the high-efficiency cleaning needs under different working conditions.

[0004] In conclusion, a new solution is urgently needed to address the aforementioned problems. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a drone cleaning arm device with adjustable water spray width.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an adjustable spray width drone cleaning arm device, comprising: a drone body, a centrifugal atomizing mechanism, a pneumatic diffusion mechanism, and an adjustment mechanism; wherein, the centrifugal atomizing mechanism is used to shear and break the incoming high-pressure water flow under the action of mechanical centrifugal force to form a primary atomized flow; the pneumatic diffusion mechanism is coaxially sleeved outside the centrifugal atomizing mechanism, and is used to generate a high-speed ejector airflow using a high-pressure ejector water flow, the ejector airflow and the primary atomized flow are mixed and accelerated in the pneumatic diffusion mechanism, and atomized diffusion flow is formed; the water inlet end of the adjustment mechanism is used to connect to a high-pressure water source, and the water outlet end of the adjustment mechanism is connected to the water inlet ends of the centrifugal atomizing mechanism and the pneumatic diffusion mechanism respectively, for adjusting the water flow ratio distributed to the centrifugal atomizing mechanism and the pneumatic diffusion mechanism, thereby changing the coverage width and atomized particle density of the atomized diffusion flow.

[0007] In a preferred embodiment of this utility model, the centrifugal atomizing mechanism includes: an atomizing disk drive motor, which is fixedly mounted on the bottom of the drone body; a centrifugal atomizing disk, which meshes with the output end of the atomizing disk drive motor via a drive shaft; wherein, the centrifugal atomizing disk has a fine serrated structure inside, the drive shaft has a hollow structure, and the drive shaft is connected to the output end of the adjustment mechanism via a rotary joint.

[0008] In a preferred embodiment of this utility model, the pneumatic diffusion mechanism includes: an annular ejector nozzle, which is coaxially disposed above the centrifugal atomizing disk, and the inlet of the annular ejector nozzle is connected to the water outlet of the regulating mechanism; and a diffusion shroud, which is trumpet-shaped and coaxially fixed downstream of the annular ejector nozzle, the inner cavity of which is a mixing and acceleration channel for the primary atomized flow and the water flow entering the annular ejector nozzle.

[0009] In a preferred embodiment of this utility model, the regulating mechanism includes an electronically controlled proportional diversion valve, which includes a main water inlet, a main outlet, and an ejector outlet; the main outlet is connected to the hollow drive shaft on the centrifugal atomizing disc via a pipeline, and the ejector outlet is connected to the annular ejector nozzle via a pipeline.

[0010] In a preferred embodiment of this utility model, a flow stabilizing cavity is provided inside the annular ejector nozzle, and an annular tapering cavity is provided in connection with the flow stabilizing cavity.

[0011] In a preferred embodiment of this invention, the micro-serrated structure of the centrifugal atomizing disc is made of a metal-based composite ceramic material.

[0012] In a preferred embodiment of this utility model, a mixing chamber is provided inside the diffusion shroud, and an annular nozzle is connected to the lower end of the mixing chamber.

[0013] In a preferred embodiment of the present invention, a control unit and a mobile power supply are also included. The control unit is used to control the operation of the centrifugal atomization mechanism, and the mobile power supply provides power support for the operation of the drone body.

[0014] In a preferred embodiment of this utility model, a flow sensor is further provided in the regulating mechanism, and the flow sensor is signal-connected to the control unit.

[0015] In a preferred embodiment of this utility model, the centrifugal atomizing mechanism and the aerodynamic diffusion mechanism are fixedly connected to the bottom of the UAV body via a support rod.

[0016] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0017] (1) By setting up a centrifugal atomization mechanism, a pneumatic diffusion mechanism and an adjustment mechanism, this utility model achieves precise control of the spray width and atomized particle size. The centrifugal atomization disc initially atomizes the water flow through the centrifugal force of high-speed rotation, while the annular ejector nozzle generates a high-speed ejector airflow using the Venturi effect. The two are mixed in the horn-shaped diffuser for secondary atomization, which not only significantly improves the atomization efficiency, but also dynamically changes the energy distribution of the water flow participating in centrifugal atomization and pneumatic ejection by adjusting the proportion of the diversion valve. Compared with the existing technology that uses a fixed nozzle or a simple rotating spray arm, this utility model achieves the ability to adjust the atomization degree according to the cleaning surface. This not only effectively avoids cleaning dead corners or resource waste, but also further improves the resource utilization rate of the device in different scenarios and achieves fine control of the spraying effect.

[0018] (2) This utility model adopts a composite working principle combining centrifugal atomization and pneumatic diffusion, replacing the traditional method of simply relying on increasing water pressure for impact cleaning. The centrifugal atomization mechanism shears water into uniform and fine primary droplets, greatly increasing the specific surface area of ​​water. The pneumatic diffusion mechanism uses a small amount of high-pressure water to induce a large amount of air, forming a high-speed airborne atomized flow. This energy conversion method makes the cleaning effect more dependent on the uniform coverage and wetting of droplets, rather than the single water flow impact force. Compared with the existing high-pressure water jet cleaning technology, this design can significantly reduce the water consumption per unit area and the power requirement of the water pump while ensuring the cleaning effect, thereby reducing the overall load of the UAV system. In addition, the gentle atomization cleaning mode reduces the potential risk to easily damaged surfaces such as photovoltaic panel coatings and high-end building curtain walls, and the effect is particularly excellent in scenarios where liquid atomization is required, thereby broadening the application scenarios of UAVs. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is a perspective structural diagram of a preferred embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of a preferred embodiment of the present invention;

[0022] In the diagram: 1. Main body of the UAV; 2. Centrifugal atomization mechanism; 21. Atomizing disc drive motor; 22. Centrifugal atomizing disc; 3. Pneumatic diffusion mechanism; 31. Annular ejector nozzle; 311. Flow stabilizing chamber; 312. Annular tapering chamber; 32. Horn cover; 321. Mixing chamber; 322. Air vent; 4. Adjustment mechanism; 41. Electronically controlled proportional flow divider valve. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] Example:

[0025] like Figure 1 , Figure 2 As shown, the present invention provides a drone cleaning swing arm device with adjustable spray width, which mainly includes a drone body 1, a centrifugal atomizing mechanism 2, a pneumatic diffusion mechanism 3, and an adjustment mechanism 4. Based on the above structural design, the swing arm device composed of the centrifugal atomizing mechanism 2, the pneumatic diffusion mechanism 3, and the adjustment mechanism 4 realizes the atomization of high-pressure water flow through centrifugal force, and uses the pneumatic principle to efficiently diffuse the atomized flow, ultimately achieving precise control of the spray coverage width and particle density.

[0026] Specifically, the main body 1 of the drone serves as the flight and load-bearing platform for the entire device, and a mounting base is fixed at its bottom. The mounting base is preferably made of high-strength aluminum alloy material through precision machining, which ensures sufficient structural strength to support the underlying mechanism and achieves a lightweight design.

[0027] Furthermore, the centrifugal atomizing mechanism 2 includes an atomizing disk drive motor 21 and a centrifugal atomizing disk 22. The motor is preferably a high-speed brushless DC motor, which is fixedly installed at the lower end of the UAV body 1 and meshes with the centrifugal atomizing plate through a gear set. Specifically, the atomizing disk drive motor 21 meshes with a drive shaft at its end through a gear transmission structure. The drive shaft is fixedly connected to the center end of the centrifugal atomizing disk 22, and the drive shaft is hollow. The end of the drive shaft away from the centrifugal atomizing disk 22 is connected to the water outlet of the adjustment mechanism 4, serving as the main passage for high-pressure water. The inner wall of the drive shaft is mirror polished and made of stainless steel or titanium alloy to minimize water flow resistance and prevent corrosion.

[0028] Furthermore, the centrifugal atomizing disc 22 is integrally provided with a radially uniformly distributed fine serrated structure within its surface. This serrated structure is preferably made of a metal-based composite ceramic material, which has extremely high wear resistance and corrosion resistance, ensuring a long service life under high-pressure and high-speed operating conditions. Based on the above configuration, the atomizing disc drive motor 21 drives the centrifugal atomizing disc 22 to rotate at high speed. The high-pressure water flow is sheared and broken by the serrations on the disc surface under the action of centrifugal force, forming a uniform primary atomized flow.

[0029] Furthermore, the pneumatic diffusion mechanism 3 is coaxially sleeved outside the centrifugal atomizing mechanism 2 for secondary acceleration and diffusion of the primary atomized flow. It includes an annular ejector nozzle 31, coaxially positioned around the periphery of the centrifugal atomizing disk 22. The inlet of the annular ejector nozzle 31 is connected to the regulating mechanism 4 via a pipe. The annular ejector nozzle 31 contains an annular flow-stabilizing cavity 311 and an annular tapering cavity 312 that communicates with the annular cavity and gradually narrows along the water flow direction. Downstream of the annular ejector nozzle 31, a horn-shaped diffusion shroud is coaxially fixed. The opening angle of this diffusion shroud can be optimized between 90-150°, and it is made of lightweight and high-strength materials. The aluminum alloy or engineering plastic is made by one-piece injection molding process. A mixing chamber 321 is opened in the diffuser, and an annular nozzle is opened at the bottom of the diffuser. Specifically, the inner surface of the mixing chamber 321 is treated with ultra-smooth surface to significantly reduce airflow friction loss and ensure efficient energy transfer. At the same time, a vent 322 is opened on the outside of the diffuser to connect the external air with the flow stabilization chamber 311. In summary, the primary atomized flow and the high-speed ejected water flow ejected from the annular ejector nozzle 31 mix and collide in the mixing chamber 321 of the diffuser, undergo secondary atomization and obtain huge kinetic energy, and finally eject from the annular nozzle at the bottom of the diffuser as an ultra-wide atomized diffusion flow with a huge fan angle and adjustable coverage.

[0030] Furthermore, the regulating mechanism 4 includes an electrically controlled proportional flow divider valve 41, which is preferably a pilot-operated electromagnetic proportional valve or a precision ball valve driven by a servo motor. The electrically controlled proportional flow divider valve 41 has a main inlet connected to an external high-pressure water source, a main outlet, and an ejector outlet. The main outlet is connected to the upper inlet of the drive shaft through a high-pressure pipeline, and the ejector outlet is connected to the inlet of the annular ejector nozzle 31 through a pipeline.

[0031] Based on the above configuration, the high-pressure water source enters the centrifugal atomizing disc 22 from the main outlet via the regulating mechanism 4, and then enters the annular cavity of the annular ejector nozzle 31 from the ejector outlet. After initial atomization by the centrifugal atomizing disc 22, the water flow is further accelerated by the annular converging cavity 312 connected to the annular cavity. The accelerated water then flows into the mixing cavity 321 inside the horn cover 32. After leaving the annular converging cavity 312, the water is no longer constrained by the pipe wall and rapidly rubs against the surrounding air, breaking into water droplets. Its speed decreases rapidly due to air resistance. Simultaneously, this water flow carries away the water in the mixing cavity 321 that was in contact with the surrounding air. The air forms a local low-pressure zone below atmospheric pressure in the mixing chamber 321. At this time, the air in the area carried away by the water jet will be further filled into the mixing chamber 321 through the vent 322 on the outside of the horn cover 32. Then, gas and liquid are mixed in the mixing chamber 321 and cut into uniform water mist. Finally, it is sprayed out from the annular nozzle of the horn cover 32 to form an ultra-wide atomized diffusion flow. By controlling the water flow splitting ratio of the electronically controlled proportional flow divider valve 41, the flow rate of water entering different outlets can be controlled, thereby controlling the atomization degree of the final sprayed water flow. In this way, the water content can be adjusted for different cleaning objects to improve the cleaning effect and efficiency.

[0032] Furthermore, the main body 1 of the drone is also equipped with a control unit and a mobile power supply. The control unit is connected to the electronically controlled proportional diversion valve 41 and the atomizing disc drive motor 21. In addition, a flow sensor is also installed in the pipeline of the electronically controlled proportional diversion valve 41 of the adjustment mechanism 4 to monitor water flow data in real time and feed it back to the control unit. The control unit can automatically adjust the opening ratio of the diversion valve and the rotation speed of the centrifugal atomizing disc 22 based on parameters such as the real-time flight speed of the drone and the distance to the cleaning surface, according to a preset algorithm, thereby achieving intelligent matching between the coverage width and the cleaning intensity.

[0033] The working principle of this utility model is as follows: An external high-pressure water pump delivers the cleaning fluid to the electronically controlled proportional flow divider valve 41. According to the instructions of the control unit, the electronically controlled proportional flow divider valve 41 divides the water flow into two streams: a main stream and an ejector stream. The main stream water is delivered to the center of a high-speed rotating centrifugal atomizing disc 22 via a hollow drive shaft. Under centrifugal force, the water is sheared by the fine serrations on the disc surface, forming a uniform primary atomized flow. Simultaneously, the ejector stream water enters the stabilizing chamber 311 of the annular ejector nozzle 31, and after being accelerated by the annular tapering chamber 312, forms a high-speed, low-pressure water jet that is injected into the mixing chamber 321 of the diffuser shroud. The flow creates a local negative pressure in the mixing chamber 321 through the Venturi effect, thereby continuously drawing in external air through the vent 322. This air then collides, shears, and mixes violently with the primary atomized flow in the mixing chamber 321, achieving secondary atomization. Finally, this gas-liquid two-phase mixed flow is shaped and accelerated by the annular nozzle at the bottom of the diffuser, forming an ultra-wide atomized diffusion flow with adjustable coverage that is sprayed onto the cleaning surface. During the process, the control unit adjusts the proportion of the diverter valve and the rotation speed of the atomizing disc in real time based on parameters such as the UAV's flight speed and ground clearance, thereby controlling the spray width and impact force to achieve efficient adaptive cleaning.

[0034] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A drone cleaning arm device with adjustable water spray width, characterized in that, include: The unmanned aerial vehicle (UAV) consists of a main body (1), a centrifugal atomization mechanism (2), an aerodynamic diffusion mechanism (3), and an adjustment mechanism (4); among which, The centrifugal atomizing mechanism (2) is used to shear and break the incoming high-pressure water flow under the action of mechanical centrifugal force to form a primary atomized flow; The pneumatic diffusion mechanism (3) is coaxially sleeved outside the centrifugal atomizing mechanism (2) and is used to generate a high-speed ejector airflow using a high-pressure ejector water flow. The ejector airflow and the primary atomizing flow are mixed and accelerated in the pneumatic diffusion mechanism (3) to form an atomized diffusion flow. The inlet of the regulating mechanism (4) is used to connect to a high-pressure water source. The outlet of the regulating mechanism (4) is connected to the inlet of the centrifugal atomizing mechanism (2) and the pneumatic diffusion mechanism (3) respectively. It is used to adjust the ratio of water flow to the centrifugal atomizing mechanism (2) and the pneumatic diffusion mechanism (3), thereby changing the coverage width and atomized particle density of the atomized diffusion flow.

2. The adjustable water spray width drone cleaning swing arm device according to claim 1, characterized in that: The centrifugal atomizing mechanism (2) includes: Atomizing disc drive motor (21) is fixedly installed at the bottom of the UAV body (1); Centrifugal atomizing disc (22), the centrifugal atomizing disc (22) is engaged with the output end of the atomizing disc drive motor (21) through a drive shaft; The centrifugal atomizing disk (22) is provided with a fine sawtooth structure, the drive shaft adopts a hollow structure, and the drive shaft is connected to the output end of the adjustment mechanism (4) through a rotary joint.

3. The adjustable water spray width drone cleaning swing arm device according to claim 2, characterized in that: The pneumatic diffusion mechanism (3) includes: An annular ejector nozzle (31) is coaxially arranged above the centrifugal atomizing disk (22), and the inlet of the annular ejector nozzle (31) is connected to the water outlet of the regulating mechanism (4). The diffuser is funnel-shaped and coaxially fixed downstream of the annular ejector nozzle (31). The inner cavity of the diffuser is a mixing and acceleration channel for the primary atomized flow and the water flow entering the annular ejector nozzle (31).

4. The adjustable water spray width drone cleaning swing arm device according to claim 3, characterized in that: The regulating mechanism (4) includes an electronically controlled proportional diversion valve (41), which includes a main water inlet, a main outlet and an ejector outlet. The main outlet is connected to the hollow drive shaft on the centrifugal atomizing disc (22) via a pipeline, and the ejector outlet is connected to the annular ejector nozzle (31) via a pipeline.

5. The adjustable water spray width drone cleaning swing arm device according to claim 4, characterized in that: The annular ejector nozzle (31) has a flow stabilizing cavity (311) inside, and an annular tapering cavity (312) is provided in connection with the flow stabilizing cavity (311).

6. The adjustable water spray width drone cleaning swing arm device according to claim 2, characterized in that: The micro-serrated structure of the centrifugal atomizing disk (22) is made of metal-based composite ceramic material.

7. The adjustable water spray width drone cleaning swing arm device according to claim 3, characterized in that: A mixing chamber (321) is provided inside the diffusion hood, and an annular nozzle is connected to the lower end of the mixing chamber (321).

8. The adjustable water spray width drone cleaning swing arm device according to claim 1, characterized in that: It also includes a control unit and a mobile power supply. The control unit is used to control the operation of the centrifugal atomizing mechanism (2), and the mobile power supply provides power support for the operation of the drone body (1).

9. The adjustable water spray width drone cleaning swing arm device according to claim 8, characterized in that: The regulating mechanism (4) is also equipped with a flow sensor, which is connected to the control unit.

10. The UAV cleaning arm device with adjustable water spray width according to claim 1, characterized in that: The centrifugal atomizing mechanism (2) and the aerodynamic diffusion mechanism (3) are fixedly connected to the bottom of the UAV body (1) by a support rod.

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