Liquid pesticide spraying device of plant protection unmanned aerial vehicle

Abstract

The utility model belongs to the technical field of plant protection unmanned aerial vehicles, and particularly relates to a plant protection unmanned aerial vehicle liquid pesticide spraying device which comprises a pesticide storage box, a delivery pump and a plurality of sprayers, the delivery pump is arranged on the pesticide storage box, and the sprayers are arranged on a rack of a plant protection unmanned aerial vehicle. A multi-way pipe is arranged between the plurality of spray heads and the conveying pump; the liquid level stabilizing mechanism comprises a spring, a vertical rod arranged on the pesticide storage box and a suspension plate arranged in the pesticide storage box. According to the liquid level stabilizing mechanism, a suspension plate and a vertical rod are matched with each other, the problem that the flight stability of the plant protection unmanned aerial vehicle is affected due to oscillation caused by reduction of the liquid level is solved, meanwhile, a first piston plate, a spring and a second piston plate are matched with each other, when the liquid level fluctuates greatly, the suspension plate can be rapidly positioned, meanwhile, wave power is released, and the flight stability of the plant protection unmanned aerial vehicle is improved. The influence of liquid level fluctuation on the flight of the plant protection unmanned aerial vehicle is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of plant protection UAVs, and in particular relates to a liquid medicine spraying device for a plant protection UAV. Background Art

[0002] With the development of science and technology, automated equipment can replace manual work, improve production efficiency and reduce production costs, so automated equipment is widely used in various industries. For example, the use of drones to replace manual spraying of pesticides is favored by farmers. Among them, the liquid bearing structure required for the spraying mechanism is the medicine box, which is made of lightweight plastic material and is located inside or outside the body. However, when the plant protection drone medicine box is spraying pesticides, due to the reduction of liquid, the liquid will vibrate in the storage box, which not only affects the flight of the drone, but also affects the uniformity of the liquid spraying.

[0003] To solve the above problems, the Chinese patent "A plant protection drone medicine box" authorization announcement number is "CN212797328U". The plant protection drone medicine box can effectively avoid the plant protection drone medicine box when spraying pesticides. Due to the reduction of the liquid, the liquid will vibrate in the medicine storage box, thereby maintaining the stability of the drone flight and improving the uniformity of the liquid spraying.

[0004] Although the above application solves the problem that when the plant protection UAV is spraying the liquid, the vibration caused by the reduction of the liquid level will affect the flight stability of the plant protection UAV. However, when the height of the plant protection UAV changes, the liquid level will fluctuate over a large range. The cooperation between the annular fixing block and the hollow plate cannot quickly stabilize the liquid, affecting the stability of the plant protection UAV when spraying the entire liquid. Utility Model Content

[0005] The utility model aims to provide a liquid medicine spraying device for a plant protection UAV, which can quickly stabilize when a large range of fluctuations occur in the medicine box of the plant protection UAV, thereby improving the stability of the plant protection UAV when spraying liquid medicine.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A liquid medicine spraying device for a plant protection UAV comprises a medicine storage box, a delivery pump and a plurality of nozzles, wherein the delivery pump is arranged on the medicine storage box, the plurality of nozzles are arranged on a frame of the plant protection UAV, and a multi-way pipe is arranged between the plurality of nozzles and the delivery pump;

[0008] A liquid level stabilizing mechanism, the liquid level stabilizing mechanism comprising a spring, a vertical rod arranged on the medicine storage box and a suspension plate arranged in the medicine storage box, the bottom end of the vertical rod passes through the medicine storage box, and the suspension plate is slidably connected to the surface of the vertical rod;

[0009] A plurality of L-shaped circular grooves are formed at the bottom end of the suspension plate. One end of the spring is fixedly connected to the inner wall of the circular groove, and the other end of the spring is fixedly connected to a first piston plate. One end of the first piston plate is fixedly connected to a connecting rod located inside the spring. The other end of the connecting rod penetrates through the spring and is fixedly connected to a second piston plate that is used in cooperation with the circular groove. Through holes that are evenly distributed and communicate with the circular grooves are formed at the top end of the suspension plate.

[0010] In a preferred embodiment, the bottom of the medicine storage box is funnel-shaped. An extrusion plate that is slidably connected to the vertical rod is fixedly connected to the bottom end of the suspension plate, and the shape of the extrusion plate is adapted to the shape of the bottom end of the medicine storage box.

[0011] In a preferred embodiment, trapezoidal grooves that are annularly distributed are formed at the bottom end of the extrusion plate, and the trapezoidal grooves communicate with the circular grooves.

[0012] In a preferred embodiment, a convex block is fixedly connected to the end of the second piston plate away from the connecting rod, and the convex block is made of rubber material.

[0013] In a preferred embodiment, a blocking frame located below the through hole is fixedly connected to the inner wall of the circular groove, and the first piston plate is in close contact with the blocking frame.

[0014] In a preferred embodiment, a plurality of four counterweight blocks are fixedly connected to the top end of the suspension plate, and the four counterweight blocks are annularly distributed on the suspension plate with the vertical rod as the center.

[0015] In a preferred embodiment, both the upper opening and the lower opening of the through hole are trumpet-shaped. A concave portion that is used in cooperation with the through hole is provided at the top end of the suspension plate, and an observation plate is provided on the medicine storage box.

[0016] In a preferred embodiment, a liquid injection port is formed at the top end of the vertical rod, and a sealing plug is provided at the upper opening of the liquid injection port.

[0017] The technical effects achieved by the present utility model are as follows:

[0018] In the liquid level stabilizing mechanism of the present utility model, the suspension plate and the vertical rod are used in cooperation. When the liquid level in the medicine storage box drops, the suspension plate will always float on the liquid surface, avoiding the problem that the liquid level fluctuates due to reduction, which affects the flight stability of the plant protection unmanned aerial vehicle. At the same time, the mutual cooperation of the first piston plate, the spring and the second piston plate can quickly position the suspension plate when the liquid level fluctuates greatly, and at the same time complete the release of the wave force, reducing the influence of the liquid level fluctuation on the flight of the plant protection unmanned aerial vehicle;

[0019] In the present utility model, the medicine storage box with a funnel-shaped bottom cooperates with the corresponding extrusion plate, which can gather the liquid medicine. At the same time, when the liquid level drops to the lowest level, the extrusion plate can play a scraping role to avoid the problem of liquid medicine remaining on the inner wall of the medicine storage box. At the same time, under the guidance of the concave part, the remaining liquid medicine on the suspension plate can be introduced below the suspension plate. Brief Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is a schematic diagram of the structure of the present utility model installed on a plant protection unmanned aerial vehicle;

[0022] Figure 3 is a schematic diagram of the internal structure of the present utility model;

[0023] Figure 4 is the present utility model Figure 3 an enlarged view of part A;

[0024] Figure 5 is an exploded view of the suspension plate and the extrusion plate of the present utility model.

[0025] In the drawings, the list of components represented by each reference numeral is as follows:

[0026] 100, medicine storage box; 110, observation plate; 200, delivery pump; 300, nozzle; 400, multi-way pipe; 500, liquid level stabilizing mechanism; 510, suspension plate; 511, circular groove; 512, spring; 513, first piston plate; 514, through hole; 515, blocking frame; 516, counterweight; 517, second piston plate; 520, vertical rod; 521, liquid injection port; 522, sealing plug; 530, extrusion plate; 531, trapezoidal groove. Detailed Embodiments

[0027] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given in conjunction with the accompanying drawings of the specification.

[0028] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0029] Secondly, the "one embodiment" or "embodiment" referred to herein means a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present utility model. The "in a preferred embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it an embodiment that is separate or selectively mutually exclusive with other embodiments.

[0030] Thirdly, the present utility model is described in detail in conjunction with schematic diagrams. When detailing the embodiments of the present utility model, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples, which should not limit the protection scope of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0031] Embodiment 1

[0032] Please refer to the attached Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown in the figures, this is the first embodiment of the present utility model. This embodiment provides a liquid medicine spraying device for a plant protection unmanned aerial vehicle, which includes a medicine storage tank 100, a delivery pump 200, and a plurality of nozzles 300. The delivery pump 200 is arranged on the medicine storage tank 100, the plurality of nozzles 300 are arranged on the frame of the plant protection unmanned aerial vehicle, and a multi-way pipe 400 is arranged between the plurality of nozzles 300 and the delivery pump 200;

[0033] A liquid level stabilizing mechanism 500, the liquid level stabilizing mechanism 500 includes a spring 512, a vertical rod 520 arranged on the medicine storage tank 100, and a floating plate 510 arranged in the medicine storage tank 100. The bottom end of the vertical rod 520 penetrates into the medicine storage tank 100, and the floating plate 510 is slidably connected to the surface of the vertical rod 520.

[0034] It should be noted that when the plant protection unmanned aerial vehicle sprays liquid medicine, the flight height may change during the processes of ascending, descending, and spraying. The liquid level stabilizing mechanism 500 will automatically operate during the process of liquid level change. The plant protection unmanned aerial vehicle, the delivery pump 200, and the multi-way pipe 400 are all devices with relatively mature applications in the prior art, and specific models can be selected according to actual needs. At the same time, the power supply of the delivery pump 200 can be powered by an internal power supply, which will not be elaborated herein.

[0035] In a preferred embodiment, please refer to Figure 3 、 Figure 4 and Figure 5, a plurality of four counterweight blocks 516 are fixedly connected to the top end of the floating plate 510, and the four counterweight blocks 516 are annularly distributed on the floating plate 510 around the vertical rod 520 in a circular shape. The annularly distributed counterweight blocks 516 can increase the stability of the floating plate 510, making the floating plate 510 float more stably on the surface of the liquid medicine. At the same time, when the liquid medicine drops and the floating plate 510 self-adjusts, it is more stable.

[0036] In a preferred embodiment, please refer to Figure 3 , a liquid injection port 521 is opened at the top end of the vertical rod 520, and a sealing plug 522 is arranged at the upper opening of the liquid injection port 521. The liquid medicine is added into the medicine storage box 100 through the liquid injection port 521. After the liquid medicine addition is completed, the sealing plug 522 is used to block the liquid injection port 521. The advantage of injecting the liquid medicine in this way is that the liquid medicine will be directly located at the bottom of the floating plate 510, and the floating plate 510 will quickly enter the floating state, reducing the debugging time.

[0037] Embodiment 2

[0038] Please refer to the attached Figure 3 , Figure 4 and Figure 5 As shown in, this is the second embodiment of the present invention. This embodiment provides a liquid medicine spraying device for a plant protection unmanned aerial vehicle. A plurality of L-shaped circular grooves 511 are opened at the bottom end of the floating plate 510. One end of a spring 512 is fixedly connected to the inner wall of the circular groove 511, and the other end of the spring 512 is fixedly connected to a first piston plate 513. One end of the first piston plate 513 is fixedly connected to a connecting rod located inside the spring 512. The other end of the connecting rod penetrates through the spring 512 and is fixedly connected to a second piston plate 517 that cooperates with the circular groove 511. A plurality of through holes 514 that are evenly distributed and communicate with the circular grooves 511 are opened at the top end of the floating plate 510.

[0039] In a preferred embodiment, please refer to Figure 5 , the bottom of the medicine storage box 100 is in a funnel shape. An extrusion plate 530 that is slidably connected to the vertical rod 520 is fixedly connected to the bottom end of the floating plate 510, and the shape of the extrusion plate 530 is adapted to the shape of the bottom end of the medicine storage box 100. The funnel-shaped extrusion plate 530 will strengthen the center of gravity of the floating plate 510, making the floating plate 510 more stable during operation. At the same time, the medicine storage box 100 with a funnel-shaped bottom and the corresponding extrusion plate 530 cooperate with each other to be able to gather the liquid medicine. At the same time, when the liquid level drops to the lowest level, the extrusion plate 530 can play a scraping role to avoid the problem of liquid medicine remaining on the inner wall of the medicine storage box 100.

[0040] In a preferred embodiment, please refer to Figure 4 and Figure 5, a trapezoidal groove 531 distributed in a ring shape is formed at the bottom end of the extrusion plate 530, and the trapezoidal groove 531 communicates with the circular groove 511. The trapezoidal groove 531 can quickly release the fluctuating potential energy.

[0041] In a preferred embodiment, please refer to Figure 4 , a convex block is fixedly connected to the end of the second piston plate 517 away from the connecting rod, and the convex block is a rubber material component. The rubber convex block will directly contact the inner wall of the medicine storage box 100, increasing the frictional force between the two, and serving the purpose of quickly positioning the suspension plate 510.

[0042] In a preferred embodiment, please refer to Figure 4 , a blocking frame 515 is fixedly connected to the inner wall of the circular groove 511 and located below the through hole 514, and the first piston plate 513 is in close contact with the blocking frame 515. The through hole 514 can release potential energy and at the same time serve the purpose of liquid medicine backflow, so that the liquid medicine will move to the lower part of the suspension plate 510 under relatively stable conditions.

[0043] In a preferred embodiment, please refer to Figure 4 , the upper opening and the lower opening of the through hole 514 are both in a flared shape, a concave part matching with the through hole 514 is provided at the top end of the suspension plate 510, and an observation plate 110 is arranged on the medicine storage box 100. The concave part can quickly gather and guide the backflow of the liquid medicine remaining on the top of the suspension plate 510, and the observation plate 110 can more intuitively observe the remaining situation in the medicine storage box 100.

[0044] In this embodiment, when the liquid level in the medicine storage box 100 of the plant protection unmanned aerial vehicle fluctuates, when the fluctuation is small, the suspension plate 510 and the vertical rod 520 cooperate with each other to achieve the effect of stabilizing the liquid level. When the liquid level fluctuates greatly, the liquid medicine will sequentially pass through the trapezoidal groove 531 and the L-shaped circular groove 511, and then release the wave force through the through hole 514. During this process, the water flow will impact the first piston plate 513, and the impact force will push the first piston plate 513 to move, the spring 512 will bend, and the connecting rod will drive the second piston plate 517 to penetrate out of the circular groove 511 and contact the inner wall of the medicine storage box 100, serving the purpose of quickly positioning the suspension plate 510 and preventing the suspension plate 510 from fluctuating within a large range.

[0045] The working principle of the present utility model is: The liquid medicine is added into the medicine storage box 100 through the liquid injection port 521. When the plant protection unmanned aerial vehicle is spraying the liquid medicine, the liquid medicine in the medicine storage box 100 is transported into the multi-way pipe 400 by the delivery pump 200, and finally sprayed out through the nozzle 300 to realize the spraying operation of the liquid medicine. During the spraying process, when the liquid level stabilizing mechanism 500 follows the reduction of the liquid medicine or the liquid level fluctuates greatly, it will automatically operate to stabilize the liquid level.

[0046] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model are implemented by conventional means in the art without special description and limitation.

Claims

1. A liquid medicine spraying device for a plant protection unmanned aerial vehicle, which is applied to a plant protection unmanned aerial vehicle, and is characterized in that: It includes a medicine storage tank (100), a delivery pump (200) and multiple nozzles (300). The delivery pump (200) is arranged on the medicine storage tank (100), and multiple nozzles (300) are arranged on the frame of the plant protection UAV. A multi-way pipe (400) is arranged between the multiple nozzles (300) and the delivery pump (200); A liquid level stabilizing mechanism (500), the liquid level stabilizing mechanism (500) includes a spring (512), a vertical rod (520) arranged on the medicine storage tank (100) and a floating plate (510) arranged in the medicine storage tank (100). The bottom end of the vertical rod (520) penetrates into the medicine storage tank (100), and the floating plate (510) is slidably connected to the surface of the vertical rod (520); A plurality of L-shaped circular grooves (511) are formed at the bottom end of the floating plate (510). One end of the spring (512) is fixedly connected to the inner wall of the circular groove (511), and the other end of the spring (512) is fixedly connected to a first piston plate (513). One end of the first piston plate (513) is fixedly connected to a connecting rod located in the spring (512). The other end of the connecting rod penetrates through the spring (512) and is fixedly connected to a second piston plate (517) that cooperates with the circular groove (511). Through holes (514) that are evenly distributed and communicate with the circular grooves (511) are formed at the top end of the floating plate (510).

2. The liquid medicine spraying device of the plant protection unmanned aerial vehicle according to claim 1, wherein: The bottom of the medicine storage tank (100) is funnel-shaped. The bottom end of the floating plate (510) is fixedly connected to a pressing plate (530) that is slidably connected to the vertical rod (520), and the shape of the pressing plate (530) is adapted to the shape of the bottom end of the medicine storage tank (100).

3. The liquid medicine spraying device of the plant protection unmanned aerial vehicle according to claim 2, characterized in that: Annularly distributed trapezoidal grooves (531) are formed at the bottom end of the pressing plate (530), and the trapezoidal grooves (531) communicate with the circular grooves (511).

4. The liquid medicine spraying device of the plant protection unmanned aerial vehicle according to claim 1, characterized in that: A convex block is fixedly connected to the end of the second piston plate (517) away from the connecting rod, and the convex block is made of rubber material.

5. The liquid medicine spraying device of the plant protection unmanned aerial vehicle according to claim 1, wherein: A blocking frame (515) is fixedly connected to the inner wall of the circular groove (511) and is located below the through hole (514). The first piston plate (513) is in close contact with the blocking frame (515).

6. The liquid medicine spraying device of the plant protection unmanned aerial vehicle according to claim 1, wherein: A plurality of four counterweight blocks (516) are fixedly connected to the top end of the floating plate (510), and the four counterweight blocks (516) are annularly distributed on the floating plate (510) with the vertical rod (520) as the center.

7. The liquid medicine spraying device of the plant protection unmanned aerial vehicle according to claim 1, characterized in that: The upper opening and the lower opening of the through hole (514) are both flared. A concave portion that cooperates with the through hole (514) is provided at the top end of the floating plate (510). An observation plate (110) is arranged on the medicine storage tank (100).

8. The liquid medicine spraying device of the plant protection unmanned aerial vehicle according to claim 1, characterized in that: A liquid injection port (521) is formed at the top end of the vertical rod (520), and a sealing plug (522) is arranged at the upper opening of the liquid injection port (521).

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