A kind of anti-oscillation liquid tank for plant protection helicopter

Abstract

The utility model relates to the technical field of plant protection helicopter, the utility model provides a kind of anti-sloshing liquid tank for plant protection helicopter, it includes box, bottom shell, anti-sloshing baffle structure and wave suppression plate.The anti-sloshing baffle structure is fixed in box inner chamber bottom, the wave suppression plate is fixed in box inner chamber upper portion, and upper evenly is equipped with several lattice holes, for reducing the sloshing degree of liquid in box.The box, anti-sloshing baffle structure and wave suppression plate preferably are integrally formed setting.The bottom shell includes conical shell and liquid collecting cup, the mounting hole for installing liquid suction pump water inlet pipe is arranged in the central portion of the bottom of the liquid collecting cup.The internal corners of the box and the bottom shell are all rounded.The utility model is integrally formed and multiple sloshing suppression structures, effectively suppresses liquid sloshing, improves flight stability and spraying precision;With simple structure, the sloshing suppression effect is remarkable, liquid utilization rate is high, easy to maintain and the like advantages.

Description

Technical Field

[0001] This utility model relates to the field of plant protection helicopter technology, specifically to an anti-vibration liquid tank for plant protection helicopters. Background Technology

[0002] With the rapid development of modern agriculture, the requirements for efficiency and precision in plant protection operations are increasing. Plant protection helicopters, especially unmanned plant protection helicopters, are widely used in crop pest and disease control due to their high operational efficiency and strong adaptability. The liquid tank used to carry agricultural pesticides is one of the core components of a plant protection helicopter. However, due to the unavoidable impacts of airflow disturbances, attitude changes (such as turning, pitching, and rolling), and the shocks during takeoff and landing, the pesticide solution in the tank is prone to violent shaking, a phenomenon known as "sloshing."

[0003] The sloshing of pesticide solution can significantly alter the helicopter's center of gravity, especially for agricultural helicopters with a high payload ratio. This shift in the center of gravity severely impacts the aircraft's attitude stability, increases the burden on the flight control system, and could even lead to flight accidents, posing a potential threat to flight safety. Furthermore, violent sloshing can cause pressure fluctuations at the inlet of the suction pump, affecting the stability of the spraying system's supply and resulting in uneven spraying, reducing the accuracy and effectiveness of plant protection operations. Long-term, violent sloshing impacts can also cause fatigue damage to the tank and its supporting structure, shortening the equipment's lifespan. Additionally, traditional tank designs often have dead zones or areas that are difficult to completely drain, leading to pesticide residue. This not only results in waste but also increases cleaning difficulty, making it prone to bacterial growth or pesticide residue, affecting the purity of the solution used in subsequent applications. In some cases, violent sloshing can also cause the pesticide solution to produce excessive foam, affecting the normal operation of the pump. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides an anti-vibration liquid tank for plant protection helicopters, which solves the technical problem that the liquid in the liquid tank of plant protection helicopters is prone to vibration during flight, which increases the burden on the flight control system, and also causes pressure fluctuations at the liquid inlet of the suction pump, affecting the stability of the liquid supply of the spraying system, resulting in uneven spraying and reducing the accuracy and effectiveness of plant protection operations.

[0005] According to one aspect, at least one embodiment of the present invention provides an anti-vibration fluid tank for agricultural helicopters, comprising:

[0006] The box has a liquid replenishment pipe fixedly connected to the middle of the top wall of the box, a sealing cap screwed onto the liquid replenishment pipe, a one-way check valve installed on one side of the top wall of the box, and a bottom shell fixed to the bottom of the box.

[0007] An anti-sloshing baffle structure is fixed to the bottom of the inner cavity of the box, and the anti-sloshing baffle structure is used to reduce the degree of shaking of the medicine liquid inside the box.

[0008] A wave-damping plate is fixed to the upper part of the inner cavity of the box and is located above the anti-sloshing baffle structure. The wave-damping plate is evenly provided with a number of grid holes.

[0009] For example, in at least one embodiment of the present invention, an anti-vibration liquid tank for a plant protection helicopter is provided, wherein the tank body, bottom shell, anti-sway baffle structure, and wave-damping plate are integrally formed.

[0010] For example, in at least one embodiment of the present invention, an anti-vibration liquid tank for a plant protection helicopter is provided, wherein the bottom shell includes a conical shell, a liquid collection cup is fixedly connected to the bottom end of the conical shell, an annular baffle is fixed to the top of the liquid collection cup, and an installation hole for installing the water inlet pipe of the plant protection helicopter's liquid suction pump is provided in the center of the bottom of the liquid collection cup.

[0011] For example, in a plant protection helicopter anti-vibration liquid tank provided in at least one embodiment of the present invention, the anti-vibration baffle structure includes several parallel horizontal baffles, the two ends of the horizontal baffles are fixedly connected to the inner wall of the tank, several vertical baffles are uniformly fixed between adjacent horizontal baffles, and several through holes are provided on both the horizontal baffles and the vertical baffles.

[0012] For example, in a plant protection helicopter anti-vibration liquid tank provided in at least one embodiment of the present invention, the connection between the transverse baffle, the longitudinal baffle, and the inner wall of the tank is all arranged in an arc shape, and the internal edges of the tank body and the bottom shell are all rounded.

[0013] For example, in at least one embodiment of the present invention, an anti-vibration liquid tank for a plant protection helicopter is provided, wherein the tank body, bottom shell, anti-sway baffle structure, and wave-damping plate are all made of high-density polyethylene.

[0014] For example, in at least one embodiment of this utility model, a shock-absorbing liquid tank for a plant protection helicopter is provided, wherein a filter cartridge is installed inside the liquid replenishment pipe.

[0015] For example, in at least one embodiment of this utility model, a shock-absorbing liquid tank for a plant protection helicopter is provided, wherein a sealing ring is fixed to the bottom wall of the inner cavity of the sealing cover.

[0016] The beneficial effects of the embodiments of this utility model are as follows:

[0017] This invention utilizes an integrated design of the tank body, anti-sloshing baffle structure, and wave-damping plate, along with the synergistic effect of the anti-sloshing baffle structure and wave-damping plate, to effectively suppress the sloshing of the pesticide solution from both the bottom and surface levels of the tank. The anti-sloshing baffle structure, through a grid-like partition formed by horizontal and vertical baffles, divides the pesticide solution into multiple small areas, significantly increasing the resistance to flow and dissipating energy through through-holes. The wave-damping plate effectively suppresses vertical spillage and "surges," preventing liquid from impacting the sealing cap. This dual suppression mechanism significantly reduces the impact of pesticide sloshing on the helicopter's flight attitude, improving flight stability and safety, reducing the burden on the flight control system, and effectively avoiding flight accidents caused by center of gravity shift. Simultaneously, the reduced sloshing amplitude ensures stable pressure at the inlet of the suction pump, effectively preventing problems such as uneven spraying, pump cavitation, or excessive foaming, greatly improving the uniformity and efficiency of plant protection operations. Furthermore, it reduces the impact of the pesticide solution on the inner wall of the tank and the fixed structure, extending the service life of the tank and related equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0019] Figure 1 This is a perspective view of the top structure of this utility model;

[0020] Figure 2 This is a perspective view of the bottom structure of this utility model;

[0021] Figure 3 This is a three-dimensional view of the internal structure of the box of this utility model;

[0022] Figure 4 This is a three-dimensional structural view of the anti-sway baffle structure of this utility model;

[0023] Figure 5 This is a perspective view of the bottom shell structure of this utility model;

[0024] In the diagram: 1. Box body; 2. Liquid replenishment pipe; 3. One-way check valve; 4. Filter cartridge; 5. Sealing cap; 6. Bottom shell; 61. Conical shell; 62. Liquid collection cup; 63. Annular baffle; 7. Mounting hole; 8. Anti-sloshing baffle structure; 81. Horizontal baffle; 82. Longitudinal baffle; 83. Through hole; 9. Wave suppressor; 10. Grid hole. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0026] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1-3 As shown, it illustrates an anti-vibration fluid tank for a plant protection helicopter according to an embodiment of the present invention, comprising:

[0032] Box 1, with a liquid replenishment pipe 2 fixedly connected to the middle of the top wall of box 1, a sealing cap 5 screwed onto the liquid replenishment pipe 2, a one-way check valve 3 installed on one side of the top wall of box 1, and a bottom shell 6 fixed to the bottom of box 1.

[0033] Anti-sloshing baffle structure 8 is fixed to the bottom of the inner cavity of the box 1. Anti-sloshing baffle structure 8 is used to reduce the degree of shaking of the medicine liquid in the box 1.

[0034] Wave damping plate 9 is fixed to the upper part of the inner cavity of the box 1. The wave damping plate 9 is located above the anti-sway baffle structure 8. Several grid holes 10 are evenly opened on the wave damping plate 9.

[0035] The housing 1, bottom shell 6, anti-sloshing baffle structure 8, and wave suppressor 9 are integrally molded. The housing 1, bottom shell 6, anti-sloshing baffle structure 8, and wave suppressor 9 are all made of high-density polyethylene. A filter cartridge 4 is installed inside the replenishment pipe 2. A sealing ring is fixed to the bottom wall of the inner cavity of the sealing cap 5.

[0036] In this embodiment, the container 1 serves as the main structure of the liquid tank, used to contain the pesticide solution. The container 1 is manufactured using a one-piece molding process from high-density polyethylene (HDPE) material. HDPE material possesses excellent corrosion resistance, UV resistance, good toughness and impact resistance, and has a low density, which helps reduce the overall weight. One-piece molding avoids welding or splicing, significantly improving the structural strength and sealing of the container, fundamentally eliminating the risk of pesticide leakage. The external dimensions of the container 1 can be customized according to the specific mounting requirements of the agricultural helicopter; for example, it can be designed to be 1000mm long, 800mm wide, and 600mm high, with a volume of approximately 400 liters.

[0037] The replenishment pipe 2 is fixedly connected to the middle of the top wall of the tank 1. The replenishment pipe 2 is used to inject the liquid medicine into the tank. Its diameter should be large enough to ensure rapid and smooth injection of the liquid medicine; for example, a pipe with a diameter of DN80 can be used. To prevent impurities from being introduced during injection, a filter cartridge 4 is installed inside the replenishment pipe 2. This filter cartridge 4 is detachable for easy cleaning and replacement. The mesh size of the filter cartridge 4 can be selected according to the viscosity and impurity content of the liquid medicine; for example, an 80-mesh or 100-mesh stainless steel filter can be used to effectively filter particulate matter, plant residues, etc., in the liquid medicine, preventing clogging of the spraying system.

[0038] The sealing cap 5 is screwed onto the replenishment tube 2 to seal the replenishment port. A sealing ring, such as a corrosion-resistant nitrile rubber (NBR) or fluororubber (FKMO) type ring, is fixed to the bottom wall of the inner cavity of the sealing cap 5. This sealing ring fits tightly against the opening of the replenishment tube 2 when the sealing cap 5 is tightened, ensuring a complete seal of the liquid tank, preventing liquid leakage during flight turbulence, and preventing external dust, rainwater, and other contaminants from entering the tank.

[0039] A one-way check valve 3 is installed on one side of the top wall of the housing 1. This one-way check valve 3 is used to balance the air pressure inside and outside the liquid tank. During helicopter flight, changes in air pressure or consumption of the liquid will cause a pressure difference between the inside and outside of the housing. The one-way check valve 3 allows external air to enter the housing when needed, preventing the housing from deforming or collapsing due to negative pressure; at the same time, it prevents the liquid from overflowing from the top when the helicopter shakes or changes its attitude, and prevents external dust, insects, etc. from entering the liquid tank. Preferably, the one-way check valve 3 can be a duckbill valve or a spring-loaded check valve, with its opening pressure set at a low value to ensure timely balance of the internal and external pressure difference.

[0040] The bottom shell 6 is fixed to the bottom of the tank body 1. In this embodiment, the bottom shell 6 and the tank body 1 are also integrally molded from HDPE material to form a seamless whole structure, which further enhances the overall strength and leak-proof performance of the liquid tank.

[0041] The anti-sloshing baffle structure 8 is fixed to the bottom of the inner cavity of the box body 1. This structure is one of the main components for suppressing the sloshing of the medicine liquid. By increasing the resistance to the flow of the medicine liquid, it effectively reduces the amplitude of the sloshing. The anti-sloshing baffle structure 8 is also integrally formed with the box body 1.

[0042] The wave-damping plate 9 is fixed to the upper part of the inner cavity of the tank 1, located above the anti-sloshing baffle structure 8. The wave-damping plate 9 has several evenly spaced grid holes 10. The wave-damping plate 9 effectively suppresses the spillage and "surge" of liquid in the vertical direction (such as during rapid drops or bumps), preventing liquid from impacting the sealing cover 5. The wave-damping plate 9 is also integrally formed with the tank 1. The grid holes 10 can be circular, square, or rectangular, with a hole diameter or width typically between 5mm and 20mm to allow the liquid to pass smoothly while effectively suppressing liquid surface sloshing.

[0043] like Figures 4-5 As shown, it illustrates the bottom shell 6 and anti-sloshing baffle structure 8 in another embodiment of the present invention. The bottom shell 6 includes a conical shell 61, with a liquid collection cup 62 fixedly connected to the bottom end of the conical shell 61. An annular baffle 63 is fixed to the top of the liquid collection cup 62, and an installation hole 7 for installing the water inlet pipe of the plant protection helicopter suction pump is opened in the center of the bottom of the liquid collection cup 62.

[0044] In this embodiment, the conical shell 61 serves as the main body of the bottom shell 6 and has a conical structure. The cone angle of the conical shell 61 is typically designed to be between 30 and 60 degrees. This conical structure utilizes gravity to allow the liquid in the tank to naturally converge towards the center at the bottom at any liquid level, minimizing liquid residue and ensuring that the liquid can be completely drawn up by the suction pump, avoiding waste. At the same time, the conical structure also enhances the structural strength of the bottom.

[0045] The collecting cup 62 is fixedly connected to the bottom end of the conical shell 61. The collecting cup 62 is a relatively small container located at the very bottom of the conical shell 61. Its main function is to concentrate the remaining pesticide solution in a small area when the amount in the tank is extremely low, ensuring that the inlet pipe of the suction pump is always submerged in the pesticide solution, preventing cavitation, and thus ensuring the continuity and stability of the spraying operation, especially towards the end of the operation. The volume of the collecting cup 62 is typically designed to hold the minimum amount of pesticide solution required for the suction pump to start and operate stably.

[0046] An annular baffle 63 is fixed to the top of the collection cup 62. The annular baffle 63 is located above the collection cup 62, forming a ring-shaped structure. Its function is to further suppress violent shaking of the liquid in the collection cup area, especially when the liquid volume is low, preventing the liquid from splashing out of the collection cup and ensuring that the inlet of the suction pump is always covered with liquid, thus ensuring stable liquid supply even under severe vibration. This annular baffle 63 can be integrally molded with the collection cup 62.

[0047] Mounting hole 7 is located at the center of the bottom of the collection cup 62. This mounting hole 7 is the interface for installing the inlet pipe of the agricultural helicopter suction pump. Mounting hole 7 is usually designed as a threaded interface or flange connection to facilitate reliable connection and sealing of the suction pump inlet pipe. The hole diameter is determined according to the interface size of commonly used agricultural helicopter suction pumps, such as DN25, DN32, or DN40.

[0048] The structural design of the bottom shell 6 in this embodiment, especially the combination of the conical shell 61 and the collection cup 62, greatly improves the utilization rate of the liquid, reduces liquid residue, and simplifies cleaning. The annular baffle 63 further ensures the stable operation of the suction pump under low liquid level and violent shaking conditions, avoiding spraying interruptions or unevenness caused by cavitation, thereby improving work efficiency and liquid utilization.

[0049] The anti-sway baffle structure 8 includes several parallel transverse baffles 81. The two ends of the transverse baffles 81 are fixedly connected to the inner wall of the box body 1. Several longitudinal baffles 82 are evenly fixed between adjacent transverse baffles 81. Several through holes 83 are opened on both the transverse baffles 81 and the longitudinal baffles 82.

[0050] The connections between the transverse baffle 81, the longitudinal baffle 82, and the inner wall of the box 1 are all rounded, and the internal edges of the box 1 and the bottom shell 6 are all rounded.

[0051] In this embodiment, the anti-sloshing baffle structure 8 includes several parallel transverse baffles 81. These baffles are arranged parallel to each other along the width or length of the liquid tank, and their two ends are fixedly connected to the inner wall of the tank body 1. For example, 3 to 5 transverse baffles 81 can be provided, and their height is usually 1 / 3 to 1 / 2 of the tank height to ensure that they can play a sloshing suppression role at different liquid levels. These transverse baffles 81 divide the bottom space of the liquid tank into several elongated areas, restricting the large-scale lateral flow of the liquid.

[0052] Several longitudinal baffles 82 are evenly fixed between adjacent transverse baffles 81. For example, two to four longitudinal baffles 82 can be set between each pair of transverse baffles 81. These longitudinal baffles 82 are perpendicular to the transverse baffles 81, forming a grid-like partition structure that further subdivides the bottom space of the liquid tank into smaller independent compartments. This grid-like structure can effectively restrict the flow of the liquid from multiple directions, greatly increasing the resistance to liquid sloshing.

[0053] Both the transverse baffle 81 and the longitudinal baffle 82 have several through holes 83. The through holes 83 can be circular or square, and their diameter or width is typically between 10 mm and 30 mm. The function of these through holes 83 is to allow the liquid medicine to flow slowly between different compartments, preventing the formation of completely closed chambers that would cause pressure differences, while further dispersing the kinetic energy of the liquid medicine and enhancing the sloshing effect. They ensure that the liquid medicine can dissipate energy through these holes when agitated, rather than forming violent shock waves.

[0054] Meanwhile, in this embodiment, the connection between the transverse baffle 81, the longitudinal baffle 82, and the inner wall of the box 1 is all set in an arc shape, and the internal corners of the box 1 and the bottom shell 6 are all rounded. This arrangement significantly reduces the impact force of the liquid at the corners, guides the liquid to flow more smoothly, and avoids stress concentration.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An anti-vibration fluid tank for agricultural helicopters, characterized in that, include: Box (1), the top wall of the box (1) is fixedly connected to a liquid replenishment pipe (2), a sealing cap (5) is screwed onto the liquid replenishment pipe (2), a one-way check valve (3) is installed on one side of the top wall of the box (1), and a bottom shell (6) is fixed at the bottom of the box (1). Anti-sloshing baffle structure (8), the anti-sloshing baffle structure (8) is fixed at the bottom of the inner cavity of the box (1), the anti-sloshing baffle structure (8) is used to reduce the degree of shaking of the liquid medicine in the box (1); Wave-suppressing plate (9) is fixed to the upper part of the inner cavity of the box (1). The wave-suppressing plate (9) is located above the anti-sway baffle structure (8). A number of grid holes (10) are evenly opened on the wave-suppressing plate (9).

2. The anti-vibration fluid tank for a plant protection helicopter according to claim 1, characterized in that, The box body (1), bottom shell (6), anti-sloshing baffle structure (8), and wave suppressor (9) are integrally molded.

3. The anti-vibration fluid tank for plant protection helicopters according to claim 1, characterized in that, The bottom shell (6) includes a conical shell (61), the bottom end of which is fixedly connected to a liquid collection cup (62), the top of which is fixedly provided with an annular baffle (63), and the bottom center of the liquid collection cup (62) is provided with an installation hole (7) for installing the water inlet pipe of the plant protection helicopter liquid suction pump.

4. The anti-vibration fluid tank for a plant protection helicopter according to claim 1, characterized in that, The anti-sway baffle structure (8) includes several parallel horizontal baffles (81), the two ends of which are fixedly connected to the inner wall of the box (1), and several longitudinal baffles (82) are evenly fixed between adjacent horizontal baffles (81). Several through holes (83) are provided on both the horizontal baffles (81) and the longitudinal baffles (82).

5. The anti-vibration fluid tank for a plant protection helicopter according to claim 4, characterized in that, The connection between the transverse baffle (81), the longitudinal baffle (82), and the inner wall of the box (1) is all set in an arc shape, and the internal edges of the box (1) and the bottom shell (6) are all rounded.

6. The anti-vibration fluid tank for a plant protection helicopter according to claim 1, characterized in that, The box body (1), bottom shell (6), anti-sloshing baffle structure (8) and wave-damping plate (9) are all made of high-density polyethylene.

7. The anti-vibration fluid tank for a plant protection helicopter according to claim 1, characterized in that, The replenishment tube (2) is equipped with a filter cartridge (4).

8. The anti-vibration fluid tank for a plant protection helicopter according to claim 1, characterized in that, A sealing ring is fixed to the bottom wall of the inner cavity of the sealing cover (5).

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