Negative overload one-way valve structure for unmanned aerial vehicle
By designing a negative overload check valve structure in a drone, using buoyancy reset and gravity reset structures, the problem that traditional check valves cannot prevent oil leakage is solved, and effective oil isolation is achieved under different flight attitudes, ensuring that The drone supplies fuel normally.
Patent Information
- Application Number
- CN202422537109.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The flip-on check valve in traditional drones cannot effectively prevent the fuel supply tank from leaking to the main fuel tank when the drone is positive and negative overloaded, resulting in the inability to fly normally.
A negative overload check valve structure is designed, using buoyancy reset structure and gravity reset structure. It uses a valve with a density less than oil and a steel ball with a weight greater than the valve to control the oil to prevent leakage when the drone is overloaded and positive overloaded. .
Effectively prevent the oil from leaking to the main fuel tank when the drone is flying in front and back, ensuring that the drone is supplying oil normally under different flight attitudes, with a small size, light weight and simple and reliable installation method.
Smart Images
Figure CN222315521U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of one-way valves for unmanned aerial vehicles, in particular to a negative overload one-way valve structure for unmanned aerial vehicles. Background Art
[0002] The flight attitude of the drone is flexible and changeable during the flight, with two working conditions: positive overload and negative overload. There is a small hole between the main fuel tank and the fuel supply tank of the drone. When the drone is in positive overload (forward flight) and negative overload (inverted flight) and the oil in the fuel supply tank is less, it will not leak through the small hole to the main fuel tank, which can ensure that the drone can be normally fueled to maintain flight. However, when the drone is in positive overload (inverted flight) and negative overload (forward flight) and the oil in the fuel supply tank is less, the oil will leak through the small hole to the main fuel tank, causing the drone to be unable to be normally fueled to maintain flight. Therefore, a one-way valve to prevent leakage must be set at the small hole; traditional drones generally use "flip-type one-way valves", which cannot effectively prevent the oil in the fuel supply tank from leaking to the main fuel tank when the drone is positively overloaded (inverted flight) and negatively overloaded (forward flight). For this reason, a one-way valve is needed that can prevent the oil in the fuel supply tank from leaking to the main fuel tank when the drone is positively overloaded (forward flight) and negatively overloaded (inverted flight). Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a negative overload one-way valve structure for unmanned aerial vehicles. Through the sophisticated valve structure inside the one-way valve, the one-way valve can work normally under the positive overload state of the unmanned aerial vehicle, and can also work normally under the negative overload state of the unmanned aerial vehicle; the one-way valve is small in size, light in weight, and has a simple and reliable installation method. It is particularly suitable for use in the hydraulic valve system of the unmanned aerial vehicle with negative overload working conditions, and can effectively solve the problems in the background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a negative overload one-way valve structure for an unmanned aerial vehicle, comprising a shell, a valve, a steel ball and a main fuel tank, a connecting hole I is arranged at the center of the upper end of the shell, an end cover is arranged at the lower end of the shell, a connecting hole II is arranged at the center of the end cover, the connecting hole II is arranged as a conical structure, a steel ball is arranged in the connecting hole II, the valve is arranged in the shell, the upper end of the valve is in contact and sealed with the inner end of the connecting hole I, the lower part of the valve is arranged as a conical structure, and the lower end of the valve abuts against the steel ball, the lower end of the valve is arranged with a groove corresponding to the steel ball, the circumferential direction of the end cover is arranged with a through hole I connected with the inner cavity of the shell, and the shell is arranged in the main fuel tank.
[0005] Furthermore, an oil supply tank is arranged inside the main oil tank, the shell is installed on the oil supply tank, the main oil tank is provided with an oil outlet connected to the oil supply tank, a bellows connected to the oil outlet is arranged inside the oil supply tank, and the oil supply tank is provided with a through hole II connected to the main oil tank.
[0006] Furthermore, a base is provided at the lower part of the shell, the base is located in the oil supply tank, and a sealing gasket is provided between the oil supply tank and the base, and the upper part of the shell is located in the main oil tank.
[0007] Furthermore, a nut is provided on the shell, and the cooperation between the nut and the base fixes the shell on the oil supply tank.
[0008] Furthermore, the end cover is threadedly connected to the shell, at least two through holes I are provided, and the through holes I are evenly distributed along the center of the end cover.
[0009] Furthermore, the valve is designed to be a hollow structure, and the weight of the steel ball is greater than the weight of the valve.
[0010] Compared with the prior art, the beneficial effects of the utility model are:
[0011] A buoyancy reset structure is adopted, and the valve of the UAV one-way valve is designed as a closed cavity structure with an overall density less than the density of the oil, so as to control the one-way valve so that the oil in the fuel tank does not leak into the main fuel tank when the UAV is negatively overloaded and flying forward; a steel ball with a gravity greater than the buoyancy of the valve in the oil is designed at the corresponding position at the bottom of the valve, so as to control the one-way valve so that the oil in the fuel tank does not leak into the main fuel tank when the UAV is positively overloaded and flying backward. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the structure of the utility model;
[0013] Figure 2 This is a schematic diagram of the application of the utility model;
[0014] Figure 3 This is a schematic diagram of the application of the utility model when the UAV is negatively overloaded and flying;
[0015] Figure 4 It is a schematic diagram of the application of the utility model when the UAV is positively overloaded and flying inverted.
[0016] In the figure: 1 housing, 2 valve, 3 steel ball, 4 nut, 5 sealing gasket, 6 base, 7 end cover, 8 through hole I, 9 connecting hole I, 10 connecting hole II, 11 main oil tank, 12 oil supply tank, 13 bellows, 14 oil outlet, 15 through hole II. DETAILED DESCRIPTION
[0017] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0018] See also Figure 1-4 The utility model provides a technical solution: a negative overload one-way valve structure for unmanned aerial vehicles, including a shell 1, a valve 2, a steel ball 3 and a main oil tank 11. A connecting hole Ⅰ9 is arranged at the center of the upper end of the shell 1, an end cover 7 is arranged at the lower end of the shell 1, a connecting hole Ⅱ10 is arranged at the center of the end cover 7, the connecting hole Ⅱ10 is arranged in a conical structure, a steel ball 3 is arranged in the connecting hole Ⅱ10, the upper end of the connecting hole Ⅱ10 is large, and the lower end is small. The steel ball 3 is opened in the connecting hole Ⅱ10, and the sealing of the connecting hole Ⅱ10 can be realized. The valve 2 is arranged in the shell 1, and the upper end of the valve 2 is in contact and sealed with the inner end of the connecting hole Ⅰ9. The valve 2 has a hollow structure, and the overall density is less than that of the oil. Density, can float in the oil, the lower part of the valve 2 is set to a conical structure, and the lower end of the valve 2 is in contact with the steel ball 3, the lower end of the valve 2 is provided with a groove corresponding to the steel ball 3, the valve 2 is designed to be a hollow structure, and the weight of the steel ball 3 is greater than the weight of the valve 2. When the UAV is overloaded and flying upside down, the valve 2 is under the gravity of the steel ball 3, and the valve 2 is in contact and sealed with the connecting hole Ⅰ9, so that the oil in the fuel supply tank 12 does not leak into the main fuel tank 11, and the end cover 7 is provided with a through hole Ⅰ8 connected with the inner cavity of the shell 1 in the circumferential direction. The shell 1 is arranged in the main fuel tank 11, and a nut 4 is provided on the shell 1. The cooperation of the nut 4 and the base 6 fixes the shell 1 on the fuel supply tank 12.
[0019] An oil supply tank 12 is arranged in the main oil tank 11, and the shell 1 is installed on the oil supply tank 12. An oil outlet 14 connected with the oil supply tank 12 is arranged on the main oil tank 11, and a bellows 13 connected with the oil outlet 14 is arranged in the oil supply tank 12. A through hole II 15 connected with the main oil tank 11 is arranged on the oil supply tank 12, and the oil in the main oil tank 11 enters into the oil supply tank 12 through the through hole II 15, so that the oil is connected.
[0020] A base 6 is provided at the lower portion of the shell 1, the base 6 is located in the oil supply tank 12, and a sealing gasket 5 is provided between the oil supply tank 12 and the base 6. The upper portion of the shell 1 is located in the main oil tank 11, and the connection between the one-way valve and the oil supply tank 12 is sealed by the sealing gasket 5 to prevent oil leakage.
[0021] The end cover 7 is threadedly connected to the housing 1 , and at least two through holes Ⅰ8 are provided, and the through holes Ⅰ8 are evenly distributed along the center of the end cover 7 .
[0022] When in use: the one-way valve is connected between the main oil tank 11 and the oil supply tank 12 through the housing 1, the nut 4, and the sealing gasket 5. When the UAV is flying, the oil in the main oil tank 11 will enter the oil supply tank 12 through the through hole II 15, and the oil in the oil supply tank 12 will flow out of the oil supply tank 12 through the bellows 13 to supply oil to the UAV so that the UAV can maintain normal flight.
[0023] As attached Figure 3 As shown, when the UAV is negatively overloaded and flying forward, the oil stored in the fuel supply tank 12 will "float" on the top of the fuel supply tank 12. Since the valve 2 of the one-way valve is a closed cavity structure with an overall density less than the density of the oil, the one-way valve will close under the buoyancy of the oil, which can effectively prevent the oil "floating" on the top of the fuel supply tank 12 from leaking into the main fuel tank 11.
[0024] As attached Figure 4 As shown, when the UAV is overloaded and flies upside down, the main fuel tank 11 and the fuel supply tank 12 will "flip" 180 degrees, and the oil stored in the fuel supply tank 12 will be collected between the main fuel tank 11 and the fuel supply tank 12 due to the action of gravity. Since a steel ball 3 is designed at the bottom of the one-way valve valve 2, and the gravity of the steel ball 3 is greater than the buoyancy of the valve 2 in the oil, the one-way valve will be closed under the action of the gravity of the steel ball 3, which can effectively prevent the oil collected between the main fuel tank 11 and the fuel supply tank 12 from leaking from the fuel supply tank 12 to the main fuel tank 11.
[0025] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.
Claims
1. A negative overload check valve structure for an unmanned aerial vehicle, comprising a housing (1), a valve (2), a steel ball (3) and a main oil tank (11), characterized in that: A connection hole I (9) is provided at the center of the upper end of the shell (1), an end cover (7) is provided at the lower end of the shell (1), a connection hole II (10) is provided at the center of the end cover (7), the connection hole II (10) is provided in a conical structure, a steel ball (3) is provided in the connection hole II (10), the valve (2) is provided in the shell (1), the upper end of the valve (2) contacts and seals with the inner end of the connection hole I (9), the lower part of the valve (2) is provided in a conical structure, the lower end of the valve (2) abuts against the steel ball (3), the lower end of the valve (2) is provided with a groove corresponding to the steel ball (3), the end cover (7) is provided with a through hole I (8) in the circumferential direction thereof and communicates with the inner cavity of the shell (1), and the shell (1) is provided in a main oil tank (11).
2. The negative overload check valve structure for UAV according to claim 1, characterized in that: An oil supply tank (12) is arranged in the main oil tank (11), the housing (1) is mounted on the oil supply tank (12), an oil outlet (14) communicating with the oil supply tank (12) is arranged on the main oil tank (11), a bellows (13) connected to the oil outlet (14) is arranged in the oil supply tank (12), and a through hole II (15) communicating with the main oil tank (11) is arranged on the oil supply tank (12).
3. The negative overload check valve structure for UAV according to claim 2, characterized in that: A base (6) is provided at the lower portion of the housing (1), the base (6) is located in the oil supply tank (12), a sealing gasket (5) is provided between the oil supply tank (12) and the base (6), and the upper portion of the housing (1) is located in the main oil tank (11).
4. The negative overload one-way valve structure for UAV according to claim 3, characterized in that: A nut (4) is provided on the housing (1), and the nut (4) cooperates with the base (6) to fix the housing (1) on the oil supply tank (12).
5. The negative overload one-way valve structure for UAV according to claim 1, characterized in that: The end cover (7) is threadedly connected to the housing (1), and at least two through holes I (8) are provided, and the through holes I (8) are evenly distributed along the center of the end cover (7).
6. The negative overload one-way valve structure for UAV according to claim 1, characterized in that: The valve (2) is designed to be a hollow structure, and the weight of the steel ball (3) is greater than the weight of the valve (2).