Drone Sloshing Prevention Multi-Layer Array Type Liquid Storage Device

Abstract

To provide an unmanned aircraft sloshing preventive multilayer array type liquid storage device that improves stability during flight of an unmanned aircraft by suppressing shaking of liquid inside the unmanned aircraft liquid storage device.SOLUTION: An unmanned aircraft sloshing preventive multilayer array type liquid storage device comprises one liquid storage unit and a plurality of communication pipes. The liquid storage unit is arranged in an unmanned aircraft and is used for storing liquid, the liquid storage unit comprising one lower liquid storage unit and a plurality of upper liquid storage units; a horizontal height of each of the upper liquid storage units is higher than a horizontal height of the lower liquid storage unit; a centroid of the lower liquid storage unit and a centroid of each of the upper liquid storage units are located on a centroid axis of the unmanned aircraft; and the lower liquid storage unit comprises an output pipe. The communication pipes are provided between each of the upper liquid storage units and the lower liquid storage unit, respectively, and the liquid inside each of the upper liquid storage units flows into the lower liquid storage unit via each of the communication pipes.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the field of drone technology, and in particular to a drone anti-sloshing multi-layer array liquid storage device.

Background Art

[0002] Because drones are lightweight and easy to control, in recent years, the application of the technology of carrying liquids on drones to perform high-altitude spraying operations has been increasingly popular.

[0003] For example, a container containing a cleaning liquid is suspended from a drone, the drone is controlled to rise and approach a high-voltage transmission tower, and the output pipe of the container is controlled to spray the cleaning liquid to clean the barrier of the transmission tower. Thereby, the risks of falling and electric shock that may occur when climbing the transmission tower are significantly reduced, and the effects of saving time and labor can be achieved.

[0004] Also, for example, a container containing a pesticide or fertilizer liquid is suspended from a drone, the drone is controlled to fly over the farmland, the output pipe of the container is controlled to eject the pesticide or fertilizer, and the pesticide or fertilizer is sprayed on the crops. Thereby, the risk of poisoning due to direct contact between humans and pesticides or fertilizers is significantly reduced, and the effects of saving time and labor can be achieved.

[0005] However, for a drone carrying a liquid to perform high-altitude work, when the liquid in its container sways, the position of the center of gravity of the entire aircraft changes. At the same time, the inertial force generated by the sway of the liquid affects the stability of the attitude control of the drone, and it is impossible to accurately aim the cleaning liquid, pesticide or fertilizer liquid at the target.

[0006] Although violent swaying of the liquid can be avoided by reducing the speed of the drone, the working time is thereby delayed. Or, the volume of the liquid storage container can be reduced to reduce the space in which the liquid sways in the container, but this method requires frequent filling of the liquid and cannot be suitable for long-time or large-area work.

Summary of the Invention

Problems to be Solved by the Invention

[0007] Based on this, how to develop a "drone sloshing prevention multi-layer array liquid storage device" that can prevent the sloshing of the liquid inside the drone liquid storage device and improve the stability of the drone during flight has become an issue that those skilled in the art hope to solve.

Means for Solving the Problem

[0008] In one embodiment, the drone sloshing prevention multi-layer array liquid storage device provided by the present invention is installed on the drone and used for containing liquid, including one lower-layer liquid storage unit and a plurality of upper-layer liquid storage units. The horizontal height of the upper-layer liquid storage units is higher than that of the lower-layer liquid storage unit. The center of gravity of the lower-layer liquid storage unit and the centers of gravity of the plurality of upper-layer liquid storage units are located on the center of gravity axis of the drone. A liquid storage unit having an output pipe at the bottom of the lower-layer liquid storage unit, a plurality of communication pipes respectively provided between each of the upper-layer liquid storage units and the lower-layer liquid storage unit, and is provided with The liquid inside each of the upper-layer liquid storage units flows into the lower-layer liquid storage unit through each of the communication pipes.

Effects of the Invention

[0009] The drone sloshing prevention multi-layer array liquid storage device of the present invention can prevent the sloshing of the liquid inside the drone liquid storage device and improve the stability of the drone during flight.

Brief Description of the Drawings

[0010]

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Embodiments for Carrying Out the Invention

[0011] Referring to FIGS. 1 to 3, the drone sloshing prevention multi-layer array type liquid storage device 100 of the present invention includes a liquid storage unit 10 and a plurality of communication pipes 20.

[0012] The liquid storage unit 10 includes one lower-layer liquid storage unit 11 and a plurality of upper-layer liquid storage units 12.

[0013] The functions of the lower-layer liquid storage unit 11 and the upper-layer liquid storage units 12 are to hold liquid. Depending on actual needs, the liquid may be a cleaning liquid, a pesticide, or a fertilizer liquid.

[0014] The lower part of the lower-layer liquid storage unit 11 has an output pipe 111, and the lower end of the output pipe 111 is an outlet end 112. The liquid in the lower-layer liquid storage unit 11 can be ejected from the outlet end 112 of the output pipe 111, that is, the liquid is ejected downward.

[0015] However, depending on actual needs, the position of the output pipe 111 is not limited to the bottom of the lower-layer liquid storage unit 11, and the outlet end 112 is not limited to be installed at the lower end of the output pipe. That is, the ejection direction of the liquid is not limited to ejecting downward.

[0016] Referring to FIGS. 1 and 2, the horizontal height H12 of the upper-layer liquid storage unit 12 is higher than the horizontal height H11 of the lower-layer liquid storage unit 11.

[0017] A communication pipe 20 is provided between each upper-layer liquid storage unit 12 and the lower-layer liquid storage unit 11. The communication pipe 20 communicates with the internal spaces of each upper-layer liquid storage unit 12 and the lower-layer liquid storage unit 11.

[0018] In the embodiment of FIG. 1, each communicating pipe 20 has a check valve 21, and the liquid in each upper liquid storage unit 12 flows into the lower liquid storage unit 11 in one direction via each communicating pipe 20, preventing the liquid in the lower liquid storage unit 11 from flowing back into the upper liquid storage unit 12 via the communicating pipe 20. However, the installation of the check valve 21 is not essential, and it can be determined whether to install the check valve 21 according to the requirements of the actual situation.

[0019] The materials and forms of the communicating pipes 20 and the check valves 21 are not limited. For example, they may be acid-resistant and alkali-resistant materials.

[0020] After the liquid in each upper liquid storage unit 12 flows into the lower liquid storage unit 11 through each communicating pipe 20, the liquid is ejected from the output pipe 111 and the outlet end 112 at the lower part of the lower liquid storage unit 11.

[0021] Regarding the method of controlling the flow of liquid from the upper liquid storage unit 12 to the lower liquid storage unit 11, the operator can remotely control so that the liquid in each upper liquid storage unit 12 is simultaneously injected into the lower liquid storage unit 11 in an equal amount based on the actual storage amount of the liquid in the lower liquid storage unit 11. In this way, the amount of liquid in each upper liquid storage unit 12 is kept equal, and the liquid in the lower liquid storage unit 11 can always maintain a full state, so the lower liquid storage unit 11 is not involved in shaking. Regarding the liquid in each upper liquid storage unit 12, Full water Although it is not in a [specific state], since the liquid is dispersed in different upper liquid storage units 12, the degree of shaking is significantly reduced.

[0022] In this embodiment, four upper liquid storage units 12 are provided, and the four upper liquid storage units 12 are symmetrically arranged at the same horizontal height H12 to form a quadrilateral. The lower liquid storage unit 11 is located at the center of the four upper liquid storage units 12 and has a relatively low horizontal height H11, and the center of gravity of the lower liquid storage unit 11 is on the same center of gravity axis C as the centers of gravity of the four upper liquid storage units 12.

[0023] The spacing between adjacent high-level liquid storage units 12 is not limited and is designed based on the actual size and shape of the drone and the high-level liquid storage unit 12.

[0024] Referring to FIGS. 4 to 6, the connecting devices 30A and 30B carry the lower-layer liquid storage unit 11 and the high-level liquid storage unit 12. The connecting devices 30A and 30B have a plurality of hooks 31A and 31B, and the connecting device 30 is hung on the rack 202 of the drone 200 by the hooks 31A and 31B. Thereby, the lower-layer liquid storage unit 11 and the high-level liquid storage unit 12 can be installed on the drone 200.

[0025] Here, the drone 200 shown in FIGS. 4 and 6 is represented by the rack 202, and other structures of a complete drone such as a motor, a propeller, and a battery are not shown. This is to clearly show how the lower-layer liquid storage unit 11 and the high-level liquid storage unit 12 are coupled to the drone 200 by the connecting devices 30A and 30B.

[0026] When the lower-layer liquid storage unit 11 and the high-level liquid storage unit 12 are installed on the drone 200, the center of gravity of the lower-layer liquid storage unit 11 and the center of gravity of the high-level liquid storage unit 12 are located on the center of gravity axis C200 of the drone 200. Based on the understanding of people in the technical field of the present invention (i.e., the drone technology field), the center of gravity axis C200 of the drone 200 is, that is, the YAW axis of the drone 200.

[0027] It should be noted that the structure of the connecting devices 30A and 30B is not limited to the embodiments shown in FIGS. 4 and 5 based on the actual drone rack structure. For example, as long as the purpose of enabling the lower-layer liquid storage unit 11 and the high-level storage unit 12 to be coupled to the drone rack can be achieved. For example, the connecting devices 30A and 30B may be integrally formed, or the hooks 31A and 31B can be replaced by fixing with bolts.

[0028] Referring to FIGS. 7 and 8 showing a three-layer structure derived based on the embodiments of FIGS. 2 and 3, this includes a lower liquid storage unit 11 and two upper liquid storage units 12 and 12A located at different horizontal heights H12 and H12A respectively. The number of upper liquid storage units 12 and 12A increases upward from the upper liquid storage unit 12 located at the bottommost part.

[0029] In addition to being connected to the lower liquid storage unit 11 by a communication pipe 20, each upper liquid storage unit 12 is further symmetrically connected to two upper liquid storage units 12A by two communication pipes 20A. The communication pipes 20 and 20A both have check valves 21 and 21A.

[0030] Referring to FIG. 9 showing a five-layer structure derived based on the embodiments of FIGS. 7 and 8, this includes a lower liquid storage unit 11B and four upper liquid storage units 12B to 12E located at different horizontal heights H12B to H12E respectively. The number of upper liquid storage units 12B to 12E increases upward from the lowermost upper liquid storage unit 12B.

[0031] Similarly, communication pipes are provided to connect the lower liquid storage unit 11B and the upper liquid storage units 12B to 12E to each other, but are omitted in FIG. 9, and only the lower liquid storage unit 11B and the upper liquid storage units 12B to 12E in an inverted pyramid arrangement are shown.

[0032] Also, in the embodiment shown in FIG. 9, the lower liquid storage unit 11B and the upper liquid storage units 12B to 12E are all in the shape of an elongated rectangular solid, which is different from the outer shapes of the square and rectangular lower liquid storage unit 11 and upper liquid storage unit 12 shown in the embodiments of FIGS. 1 to 8.

[0033] FIG. 10 is derived based on the embodiment of FIG. 3 and includes one lower liquid storage unit 11C and four upper liquid storage units 12F. A communicating pipe 20 connected to each other is provided between the lower liquid storage unit 11C and the upper liquid storage units 12F, and the communicating pipe 20 has a check valve 21. The difference between the embodiment of FIG. 10 and FIG. 3 is that the size of the lower liquid storage unit 11C in FIG. 10 is smaller than the size of the upper liquid storage units 12F.

[0034] FIG. 11 is derived based on the embodiment of FIG. 3 and includes one lower liquid storage unit 11 and three upper liquid storage units 12. A communicating pipe 20 connected to each other is provided between the lower liquid storage unit 11 and the upper liquid storage units 12, and the communicating pipe 20 has a check valve 21. The three upper liquid storage units 12 are symmetrically arranged at the same horizontal height and form a triangle.

[0035] FIG. 12 is derived based on the embodiment of FIG. 3 and includes one lower liquid storage unit 11D and five upper liquid storage units 12G. A communicating pipe 20 connected to each other is provided between the lower liquid storage unit 11D and the upper liquid storage units 12G, and the communicating pipe 20 has a check valve 21. The five upper liquid storage units 12G are arranged at equal intervals at the same horizontal height and form a pentagon. Note that the lower liquid storage unit 11D and the upper liquid storage units 12G in this embodiment are both circular in plan view, and their outer shapes can be spherical or cylindrical.

[0036] FIGS. 1 to 12 show the structures of different embodiments, but all have common technical features, which include the following. The center of gravity of the lower liquid storage unit and the center of gravity of the upper liquid storage unit are located on the center of gravity axis of the unmanned aircraft. The structures of the lower liquid storage unit and the upper storage unit may be the same or different, that is, the liquid storage unit may have a plurality of sizes, structures or outer shapes. The upper liquid storage unit may be one layer or multiple layers. The number of upper liquid storage units is more than that of the lower liquid storage unit. The lower liquid storage unit and the upper liquid storage unit are connected to each other via a communicating pipe.

[0037] As shown in FIG. 13, the unmanned aircraft sloshing prevention multi-layer array type liquid storage device 100H of the present invention includes a liquid storage unit 10H and a plurality of communication pipes 20H. At the lower part of the lower layer liquid storage unit 11H, there is an output pipe 111, and the lower end of the output pipe 111 is an outlet end 112.

[0038] The liquid storage unit 10H includes one lower layer liquid storage unit 11H and a plurality of upper layer liquid storage units 12H. A communication pipe 20H is respectively provided between each upper layer liquid storage unit 12H and the lower layer liquid storage unit 11H. In the embodiment of FIG. 13, the communication pipe 20H does not have a check valve 21 as shown in FIG. 2.

[0039] Referring to FIGS. 14 and 15, the cross-section of the lower layer liquid storage unit 11H is a quadrilateral, and the lower layer liquid storage unit 11H has four rectangular upper layer spaces 112H and one conical lower layer space 111H. The upper layer space 112H is located above the lower layer space 111H, and four communication holes 113H communicating with each other are provided in each upper layer space 112H and the lower layer space 111H.

[0040] In the embodiments of FIGS. 14 and 15, the shapes of the upper layer spaces 112H are the same and are located at the same horizontal height. In addition, upper layer spaces 112H with different shapes can be designed according to actual needs, and their horizontal heights may also be different.

[0041] Referring to FIGS. 13 and 14, the structure of the upper layer liquid storage unit 12H and the outer shape structure of the lower layer liquid storage unit 11H may be the same, or the inside of the upper layer liquid storage unit 12H may not be divided into different spaces like the lower layer liquid storage unit 11H and may be a single space.

[0042] When the interior of the upper liquid storage unit 12H is a single space, the liquid W in each upper liquid storage unit 12H first flows into each upper space 112H of the lower liquid storage unit 11H via each communication pipe 20H. At the same time, the liquid W in each upper space 112H flows into the lower space 111H via each communication hole 113H. Finally, the liquid W is ejected from the outlet end 112 of the output pipe 111 at the lower part of the lower liquid storage unit 11.

[0043] Referring to FIGS. 16 and 17, FIG. 16 shows that the cross-section of the lower liquid storage unit 11J is hexagonal and is divided into six triangular upper spaces 112J. Each upper space 112J is provided with a communication hole 113J that communicates with a lower space (not shown). FIG. 17 shows that the cross-section of the lower liquid storage unit 11K is hexagonal and is divided into three rhomboid upper spaces 112K. Each upper space 112K is provided with a communication hole 113K that communicates with a lower space (not shown).

[0044] Referring to FIGS. 18 and 19, this embodiment is based on the embodiment of FIG. 13. The anti-sloshing multi-layer array liquid storage device 100M of the unmanned aerial vehicle of the present invention includes one liquid storage unit 10M and a plurality of communication pipes 20M. The lower liquid storage unit 11M has an output pipe 111 at its lower part, and the lower end of the output pipe 111 is the outlet end 112.

[0045] The lower liquid storage unit 11M has a plurality of upper spaces 112M and a lower space 111M. The upper space 112M is located above the lower space 111M, and each upper space 112M and the lower space 111M are provided with a plurality of communication holes 113M that communicate with each other.

[0046] The main difference between the embodiment of FIG. 18 and the embodiment of FIG. 13 is that each upper liquid storage unit 12M of the anti-sloshing multi-layer array liquid storage device 100M of the unmanned aerial vehicle is provided with an exhaust valve 13, and each upper space 112M and the lower space 111M of the lower liquid storage unit 11M are provided with an exhaust valve 13 that communicates with the external atmospheric environment. The function of the exhaust valve 13 is as follows.

[0047] Referring to FIGS. 18 and 19, the liquid W in each upper liquid storage unit 12M first flows into each upper space 112M of the lower liquid storage unit 11M via each communication pipe 20M. In the process of the liquid W flowing into each upper space 112M, the air A in the upper space 112M is discharged from the exhaust valve 13. When the liquid level in the upper space 112M rises and contacts the exhaust valve 13, the exhaust valve 13 closes, and the filling process of the liquid W is completed.

[0048] At the same time, the liquid W in each upper space 112M can flow into the lower space 111M via each communication hole 113M. Similarly, in the process of the liquid W flowing into the lower space 111M, the air A in the lower space 111M is discharged from the exhaust valve 13. When the liquid level in the lower space 111M rises and contacts the exhaust valve 13, the exhaust valve 13 closes, and the filling process of the liquid W is completed.

[0049] Finally, the liquid W is ejected from the outlet end 112 of the output pipe 111 at the lower part of the lower liquid storage unit 11.

[0050] FIGS. 1, 7 to 12, 13, 16, 17 to 19 show that the structure of the present invention is not limited to a specific form and can be mutually replaced among the structures of different embodiments.

[0051] For example, the check valve 21 in FIG. 1 is applicable to the embodiments of FIGS. 7 to 12, 13, 16, 17 to 19. The exhaust valve 13 in FIG. 18 is applicable to the embodiments of FIGS. 1, 7 to 12, 13, 16, 17. The two-layer or more structure shown in FIGS. 7 and 9 is applicable to the embodiments of FIGS. 8, 10 to 13, 16 to 19.

[0052] Referring to FIGS. 20 and 21, curves L1 and L3 represent a conventional single-tank liquid storage device, and the liquid volume size is 400 x 350 x 286 millimeters (mm). Curves L2 and L4 represent the drone sloshing prevention multi-layer array liquid storage device provided by the present invention. Its embodiment is as shown in FIGS. 1 to 5. The liquid volume sizes of the lower liquid storage unit and the upper liquid storage unit are 200 x 200 x 200 millimeters (mm), and the total liquid volume size of the liquid is 700 x 700 x 400 millimeters (mm).

[0053] After experimental verification, in the process of increasing the liquid surface inclination angle, for the drone sloshing prevention multi-layer array liquid storage device provided by the present invention, regarding the center of gravity horizontal offset, center of gravity vertical offset, etc., their numerical values are all lower than those of the conventional single-tank liquid storage device. That is, the present invention can load more liquid.

[0054] In summary, the drone sloshing prevention multi-layer array liquid storage device provided by the present invention divides the liquid and arranges it in a reverse pyramid-shaped liquid storage unit with multiple layers, limits the sloshing space of the liquid in each liquid storage unit, effectively prevents the sloshing of the liquid inside the drone's liquid storage device, and can improve the stability of the drone during flight.

[0055] Although the present invention is disclosed as above according to the embodiments, it is not intended to limit the present invention. Those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope of the following claims.

Description of Reference Numerals

[0056] 100 Drone sloshing prevention multi-layer array liquid storage device 100H Drone sloshing prevention multi-layer array liquid storage device 100J Drone sloshing prevention multi-layer array liquid storage device 100M Drone sloshing prevention multi-layer array liquid storage device 10 Liquid storage unit 10H Liquid storage unit 10M Liquid storage unit 11 Lower liquid storage unit 11B Lower liquid storage unit 11C Lower liquid storage unit 11D Lower liquid storage unit 11H Lower liquid storage unit 11J Lower liquid storage unit 11K Lower liquid storage unit 111 Outlet pipe 112 Outlet end 112H Upper space 112J Upper space 112K Upper space 112M Upper space 111H Lower space 111M Lower space 113H Communication hole 113J Communication hole 113K Communication hole 113M Communication hole 12 Upper liquid storage unit 12G Upper liquid storage unit 12H Upper liquid storage unit 13 Exhaust valve 20 Communication pipe 20A Communication pipe 20H Communication pipe 20M Communication pipe 21 Check valve 21A Check valve 30A Connecting device 30B Connecting device 31A Hook 31B Hook 200 Drone 202 Rack C Center of gravity axis C200 Center of gravity axis A Air H11 Horizontal height H12 Horizontal height H12A Horizontal height H12B Horizontal height H12C horizontal height H12D horizontal height H12E horizontal height L1 curve L2 curve L3 curve L4 curve W liquid

Claims

1. A liquid storage unit installed on a drone and used for containing liquid, comprising one lower-layer liquid storage unit and a plurality of upper-layer liquid storage units. The horizontal height of the plurality of upper-layer liquid storage units is higher than that of the lower-layer liquid storage unit. The center of gravity of the lower-layer liquid storage unit and the center of gravity of the plurality of upper-layer liquid storage units when considered together are located on the center of gravity axis of the drone. One liquid storage unit having an output pipe at the bottom of the lower-layer liquid storage unit, and a plurality of communication pipes, each of which is provided between each of the plurality of upper-layer liquid storage units and the lower-layer liquid storage unit and has at least one communication pipe, and is provided with, each of the plurality of communication pipes has a check valve, the liquid inside each of the plurality of upper-layer liquid storage units flows into the lower-layer liquid storage unit through each of the plurality of communication pipes and the check valve, the plurality of upper-layer liquid storage units have a single-layer or multi-layer structure. In the case of the single-layer structure, the horizontal heights of the plurality of upper-layer liquid storage units are the same. In the case of the multi-layer structure, each layer is located at a different horizontal height, and the horizontal heights of the plurality of upper-layer liquid storage units in any one layer are the same. In any two adjacent layers in the stacking direction, there are a plurality of communication pipes, each of which is provided between each of the plurality of upper-layer liquid storage units existing in the upper layer and each of the plurality of upper-layer liquid storage units existing in the lower layer. The center of gravity of the plurality of upper-layer liquid storage units when considered together in any one layer and the center of gravity of the lower-layer liquid storage unit are located on the center of gravity axis of the drone. An anti-sloshing multi-layer array type liquid storage device for a drone.

2. The anti-sloshing multi-layer array type liquid storage device for a drone according to claim 1, wherein a polygon is formed by connecting the center of gravity positions of each of the plurality of upper-layer liquid storage units existing at the same horizontal height, and the polygon is point-symmetric with respect to the intersection of the horizontal plane where their centers of gravity exist and the vertical line passing through the center of gravity position of the drone.

3. The anti-sloshing multi-layer array type liquid storage device for a drone according to claim 1, wherein the plurality of upper-layer liquid storage units existing at the same horizontal height are arranged at an equal distance from the center of gravity position of the drone to form a polygon.

4. The plurality of high-level liquid storage units have a multi-layer structure, with each layer located at a different horizontal height. The horizontal heights of the plurality of high-level liquid storage units in any one layer are the same. In any two adjacent layers in the stacking direction, there are provided a plurality of communication pipes, with at least one communication pipe provided between each of the plurality of high-level liquid storage units in the upper layer and each of the plurality of high-level liquid storage units in the lower layer. When the plurality of high-level liquid storage units in any one layer are considered together, the center of gravity of the plurality of high-level liquid storage units and the center of gravity of the lower-layer liquid storage unit are located on the center-of-gravity axis of the unmanned aerial vehicle. The unmanned aerial vehicle sloshing-prevention multi-layer array type liquid storage device according to claim 1.

5. The number of the plurality of high-level liquid storage units in any one layer increases from the lowermost layer upward. The unmanned aerial vehicle sloshing-prevention multi-layer array type liquid storage device according to claim 1.

6. The lower-layer liquid storage unit has a plurality of upper spaces and at least one lower space. The plurality of upper spaces are located above the lower space, and at least one communication hole is provided between each of the plurality of upper spaces and the lower space to communicate with each other. The unmanned aerial vehicle sloshing-prevention multi-layer array type liquid storage device according to claim 1.

7. Each of the plurality of high-level liquid storage units, each of the plurality of upper spaces of the lower-layer liquid storage unit, and the lower space are respectively provided with an exhaust valve communicating with the external atmospheric environment. The unmanned aerial vehicle sloshing-prevention multi-layer array type liquid storage device according to claim 6.

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