An unmanned aerial vehicle refueling system

Abstract

The unmanned aerial vehicle refueling system comprises a first to seventh oil circuit, an oil outlet ball valve, a pump inlet pressure gauge, an electric pump, a pump outlet pressure gauge, a filter separator, a flow meter, an electromagnetic valve one, a manual refueling ball valve, a reel, a first joint, an electromagnetic valve three, a flow regulating valve, an automatic exhaust valve, an electromagnetic valve two, a pair of clamping ball valves, a hand pump, a sediment ball valve, a filling ball valve, a liquid level control valve and a tank body.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle refueling system. BACKGROUND

[0002] An unmanned aircraft, commonly known as a drone, is an unmanned aerial vehicle (UAV) that is controlled remotely by a human operator or autonomously by onboard computers. In comparison with manned aircraft, drones are often more suitable for dangerous tasks. According to application fields, drones can be divided into military and civilian drones. Military drones are divided into reconnaissance drones and target drones. Civilian drones are used in various industries, which are the real needs of drones. Drones are used in aerial photography, agriculture, plant protection, micro-selfie, express delivery, disaster rescue, wildlife observation, infectious disease monitoring, surveying and mapping, power inspection, disaster relief, film shooting, and romance making, etc. to greatly expand the purposes of drones. The energy sources of drones are usually batteries and fuel. In order to improve the on-board capacity and range of drones, medium and long-range drones usually use fuel-powered engines. A quick, accurate, safe, and clean refueling device is needed for drones.

[0003] In actual engineering practice, the following problems exist:

[0004] 1. The existing hydraulic oil circuit of the unmanned aerial vehicle requires one pump for refueling and one pump for oil pumping, which is not conducive to the miniaturization of the unmanned aerial vehicle.

[0005] 2. The existing hydraulic oil circuit of the unmanned aerial vehicle has the problem of inaccurate refueling precision. The oil volume in the pipe of the reel (which can be up to 15 meters long) cannot be easily measured, and the oil volume measured by the flow meter is not equal to the oil volume from the oil outlet joint to the oil tank of the unmanned aerial vehicle.

[0006] 3. The tank pipe of the existing technology is not convenient to clean during assembly.

[0007] 4. The existing hydraulic oil circuit of the unmanned aerial vehicle is provided with a detection assembly, but for multiple oil circuits, multiple detection assemblies are needed, which is costly.

[0008] 5. The existing program-controlled system of the hydraulic oil circuit of the unmanned aerial vehicle relies on the program and cannot be easily controlled, and lacks control means in case of failure. SUMMARY

[0009] In order to overcome the above problems, the present application provides a solution that simultaneously solves the above problems.

[0010] The technical scheme adopted by the present application to solve its technical problems is: a UAV refueling system, comprising first to seventh oil paths, an oil outlet ball valve, a pump inlet pressure gauge, an electric pump, a pump outlet pressure gauge, a filter separator, a flow meter, an electromagnetic valve one, a manual refueling ball valve, a reel, a first joint, an electromagnetic valve three, a flow regulating valve, an automatic exhaust valve, an electromagnetic valve two, a clamping ball valve, a manual pump, a sediment ball valve, a filling ball valve, a liquid level control valve, and a tank body; the tank body is provided with a liquid level gauge, and the tank body is provided with an oil inlet, an oil outlet, an oil return port, and an oil drain port;

[0011] The oil outlet is connected to the first oil path, and the first oil path is sequentially provided with the oil outlet ball valve, the pump inlet pressure gauge, the electric pump, the pump outlet pressure gauge, the filter separator, the flow meter, the electromagnetic valve one, the reel, and the first joint; the second oil path is provided with the manual pump, in a first state, one end of the second oil path is connected to the oil outlet ball valve and the pump inlet pressure gauge in the first oil path through the clamping ball valve, and the other end of the second oil path is disconnected, in a second state, the other end of the second oil path is connected to the pump outlet pressure gauge input end in the first oil path through the manual pump ball valve, and the one end is connected to the UAV;

[0012] The third oil path is provided with the electromagnetic valve two, one end of the third oil path is connected to the oil outlet ball valve and the pump inlet pressure gauge in the first oil path, and the other end is connected to the electromagnetic valve one and the reel in the first oil path, and the third oil path is conducted in the automatic oil pumping process; the fourth oil path is provided with the electromagnetic valve three, one end of the fourth oil path is connected to the oil return port, and the other end is connected to the flow meter and the electromagnetic valve one in the first oil path, and the fourth oil path is conducted in the automatic oil pumping process; the electric pump is the only power source in the automatic refueling and automatic oil pumping processes; the fifth oil path is provided with the flow regulating valve, one end of the fifth oil path is connected to the oil return port, and the other end is connected to the flow meter and the filter separator in the first oil path; the sixth oil path is provided with the automatic exhaust valve;

[0013] The oil inlet, the oil outlet, and the oil drain port are located at the bottom of the tank body, the oil return port is located at the top of the tank body, the oil inlet is connected to one end of the liquid level control valve, the other end of the liquid level control valve is connected to one end of the filling ball valve, and the other end of the filling ball valve is connected to the second joint; the tank body is filled with oil before the UAV is refueled, the tank body is first filled with oil to a predetermined liquid level through the second joint, and then the first joint and the second joint are connected through the seventh oil path to pipe the first oil path;

[0014] In the self-circulation mode, the electromagnetic valve one is closed, the electromagnetic valve three is opened, the oil liquid returns to the oil return port through the first oil path and the fourth oil path, and the manual refueling ball valve is connected in parallel with the electromagnetic valve one.

[0015] Preferably, the UAV refueling system comprises an automatic refueling mode, an automatic oil pumping mode, a manual refueling mode, a manual oil pumping mode, a bottom filling mode, a pipe filling mode, and a self-circulation mode.

[0016] Preferably, a differential pressure gauge is arranged in parallel with the filter separator in the first oil path.

[0017] Preferably, a drain ball valve is arranged below the filter separator.

[0018] Preferably, a sediment ball valve is arranged below the oil drain.

[0019] Preferably, a drain tank is arranged below the sediment ball valve.

[0020] Preferably, one end of the sixth oil path is connected to the filter separator and the other end is connected to the oil return port.

[0021] Preferably, in the automatic oil pumping mode, the first solenoid valve is closed, the second solenoid valve is opened, and the third solenoid valve is opened.

[0022] Preferably, the second state is a manual oil pumping state.

[0023] Preferably, in the self-circulation mode, the first solenoid valve is closed and the third solenoid valve is opened.

[0024] The beneficial effects of the present application are:

[0025] Invention point one, the first problem raised in the background art is solved by integrating the automatic oil filling flow path and the automatic oil pumping flow path, controlling two working modes by a single electric pump, saving space and reducing cost. The manual pump is reversed by a joint, so that a single manual pump realizes bidirectional control of oil filling and oil pumping.

[0026] Invention point two, the second problem raised in the background art is solved by

[0027] Solution one, before oil filling, the tank is preliminarily filled by using the bottom filling mode, and then the fuel in the oil filling path is filled by using the pipeline filling mode, so as to facilitate subsequent accurate measurement and avoid the influence of empty pipeline.

[0028] Solution two, in the pipeline filling mode, the oil inlet joint is arranged below the tank, the oil outlet is arranged below the tank, and the oil return port is arranged above the tank; the circulation joint is connected to the oil inlet joint; instead of connecting the circulation joint to the oil return joint; so that the oil inlet pipeline is completely filled due to the action of gravity; if the circulation joint is connected to the oil return joint, the oil inlet path cannot be accurately filled.

[0029] Invention point three, the third problem raised in the background art is solved by designing a "self-circulation" mode, which removes the excess material in the assembly process and the rubber pipe and discharges it through the sediment valve.

[0030] Invention point four, the fourth problem raised in the background art is solved, so that the same set of detection components can be used for the two oil paths, saving space and reducing cost.

[0031] Invention point five, the fifth point problem proposed in the background art, a manual oil filling ball valve and a manual pump are designed to provide a "double manual" function, so that it can be more flexible adjustment, and can deal with failure. BRIEF DESCRIPTION OF DRAWINGS

[0032] The application will be further described below in conjunction with the drawings and examples.

[0033] Figure 1 is the operation control logic diagram of the application.

[0034] Figure 2 is the automatic oil filling work diagram of the application.

[0035] Figure 3 is the automatic oil pumping work diagram of the application.

[0036] Figure 4 is the manual oil filling work diagram of the application.

[0037] Figure 5 is the manual oil pumping work diagram of the application.

[0038] Figure 6 is the bottom filling work diagram of the application.

[0039] Figure 7 is the pipeline filling work diagram of the application.

[0040] Figure 8 is the self-circulation work diagram of the application.

[0041] In the drawings, the reference signs are as follows:

[0042] No. 1 oil outlet ball valve, No. 2 pump inlet pressure gauge, No. 3 electric pump, No. 4 pump outlet pressure gauge, No. 5 filter separator, No. 6 differential pressure gauge, No. 7 drain ball valve, No. 8 flow meter, No. 9 electromagnetic valve one, No. 10 manual oil filling ball valve, No. 11 oil filling and pumping reel, No. 12 self-sealing joint (male end), No. 13 electromagnetic valve three, No. 14 flow regulating valve, No. 15 automatic exhaust valve, No. 16 electromagnetic valve two, No. 17 double clamp ball valve, No. 18 manual pump, No. 19 sediment discharge ball valve, No. 20 pressure relief valve, No. 21 filling ball valve, No. 22 liquid level control valve, No. 23 float liquid level gauge, No. 24 tank body, No. 25 manhole cover, No. 26 self-sealing joint (female end), No. 27 dry self-sealing joint (male end), No. 28 drain tank, No. 29 CRJ male end joint, No. 30 self-sealing joint (female end), No. 31 manual pump ball valve. DETAILED DESCRIPTION

[0043] As shown in the figure: a UAV refueling system, comprising first to seventh oil paths, an oil outlet ball valve, a pump inlet pressure gauge, an electric pump, a pump outlet pressure gauge, a filter separator, a flow meter, a solenoid valve one, a manual oil filling ball valve, a reel, a first joint, a solenoid valve three, a flow regulating valve, an automatic exhaust valve, a solenoid valve two, a clamping ball valve, a manual pump, a sediment ball valve, a filling ball valve, a liquid level control valve, a tank; the tank is provided with a liquid level gauge, and the tank is provided with an oil inlet, an oil outlet, an oil return port, and an oil drain port;

[0044] The oil outlet is connected to the first oil path, and the first oil path is sequentially provided with the oil outlet ball valve, the pump inlet pressure gauge, the electric pump, the pump outlet pressure gauge, the filter separator, the flow meter, the solenoid valve one, the reel, and the first joint; the second oil path is provided with the manual pump, in the first state, one end of the second oil path is connected to the oil outlet ball valve and the pump inlet pressure gauge between the first oil path through the clamping ball valve, and the other end of the oil path is disconnected, in the second state, the other end of the second oil path is connected to the pump outlet pressure gauge input end in the first oil path through the manual pump ball valve, and the one end is connected to the UAV;

[0045] The third oil path is provided with the solenoid valve two, one end of the third oil path is connected to the oil outlet ball valve and the pump inlet pressure gauge between the first oil path, and the other end is connected to the solenoid valve one and the reel between the first oil path, and the third oil path is conducted in the automatic oil pumping process; the fourth oil path is provided with the solenoid valve three, one end of the fourth oil path is connected to the oil return port, and the other end is connected to the flow meter and the solenoid valve one between the first oil path, and the fourth oil path is conducted in the automatic oil pumping process; the electric pump is used as the only power source in the automatic oil filling and automatic oil pumping processes; the fifth oil path is provided with the flow regulating valve, one end of the fifth oil path is connected to the oil return port, and the other end is connected to the flow meter and the filter separator between the first oil path; the sixth oil path is provided with the automatic exhaust valve;

[0046] The oil inlet, the oil outlet, and the oil drain port are located at the bottom of the tank, the oil return port is located at the top of the tank, the oil inlet is connected to one end of the liquid level control valve, the other end of the liquid level control valve is connected to one end of the filling ball valve, and the other end of the filling ball valve is connected to the second joint; before the UAV is refueled, the tank is filled with oil, the tank is first filled with oil to a predetermined liquid level through the second joint, and then the first joint and the second joint are connected through the seventh oil path to perform pipeline filling on the first oil path;

[0047] In the self-circulation mode, the solenoid valve one is closed, the solenoid valve three is opened, the oil liquid returns to the oil return port through the first oil path and the fourth oil path, and the manual oil filling ball valve is connected in parallel with the solenoid valve one.

[0048] As shown in the figure: the system includes automatic oil filling mode, automatic oil pumping mode, manual oil filling mode, manual oil pumping mode, bottom filling mode, pipeline filling mode, self-circulation mode. A differential pressure gauge is arranged in parallel with the filter separator in the first oil circuit. A drain ball valve is connected to the filter separator. A sediment ball valve is connected below the oil drain port. A drain tank is connected below the sediment ball valve. One end of the sixth oil circuit is connected to the filter separator, and the other end is connected to the oil return port. In the automatic oil pumping mode, the electromagnetic valve one is closed, the electromagnetic valve two is opened, and the electromagnetic valve three is opened. The second state is the manual oil pumping state. In the self-circulation mode, the electromagnetic valve one is closed, and the electromagnetic valve three is opened.

[0049] The above detailed description is for the specific implementation of the feasible embodiments of the present application, which is not used to limit the patent scope of the present application. Any equivalent implementation or change without departing from the present application shall be included in the patent scope of the present application.

Claims

1. An unmanned aerial vehicle refueling system, characterized by: The tank body is provided with a liquid level gauge, and the tank body is provided with an oil inlet, an oil outlet, an oil return port, and an oil drain port; The oil outlet is connected to the first oil path, and the first oil path is sequentially provided with an oil outlet ball valve, a pump inlet pressure gauge, an electric pump, a pump outlet pressure gauge, a filter separator, a flow meter, an electromagnetic valve one, a reel, and a first joint. The third oil path is provided with an electromagnetic valve two, one end of the third oil path is connected to the oil outlet ball valve and the pump inlet pressure gauge of the first oil path, the other end of the third oil path is connected to the electromagnetic valve one and the reel of the first oil path, and the third oil path is conducted in the automatic oil pumping process. The fourth oil path is provided with an electromagnetic valve three, one end of the fourth oil path is connected to the oil return port, the other end of the fourth oil path is connected to the flow meter and the electromagnetic valve one of the first oil path, and the fourth oil path is conducted in the automatic oil pumping process. The electric pump is the only power source in the automatic oil filling and automatic oil pumping processes.

2. The unmanned aerial vehicle refueling system of claim 1, wherein: The fifth oil path is provided with a flow regulating valve, one end of the fifth oil path is connected to the oil return port, and the other end of the fifth oil path is connected to the flow meter and the filter separator of the first oil path.

3. The unmanned aerial vehicle refueling system of claim 1, wherein: The oil inlet, the oil outlet, and the oil drain port are located at the bottom of the tank body, the oil return port is located at the top of the tank body, the oil inlet is connected to one end of the liquid level control valve, the other end of the liquid level control valve is connected to one end of the filling ball valve, and the other end of the filling ball valve is connected to a second joint.

4. The UAV refueling system of claim 1, wherein: In the self-circulation mode, the electromagnetic valve one is closed, the electromagnetic valve three is opened, the oil returns to the oil return port through the first oil path and the fourth oil path, and the manual oil filling ball valve is connected in parallel with the electromagnetic valve one.

5. The UAV refueling system of claim 1, wherein: The first oil path is further provided with a differential pressure gauge connected in parallel with the filter separator.

6. The UAV refueling system of claim 5, wherein: The filter separator is connected with a discharge ball valve.

7. The UAV refueling system of claim 1, wherein: The oil drain port is connected with a sediment discharge ball valve below.

8. The UAV refueling system of claim 2, wherein: The sediment discharge ball valve is connected with a discharge tank below.

9. The UAV refueling system of claim 2, wherein: One end of the sixth oil path is connected to the filter separator, and the other end of the sixth oil path is connected to the oil return port.

10. The UAV refueling system of claim 2, wherein: In the automatic oil pumping mode, the electromagnetic valve one is closed, the electromagnetic valve two is opened, and the electromagnetic valve three is opened. The second state is a manual oil pumping state. In the self-circulation mode, the electromagnetic valve one is closed, and the electromagnetic valve three is opened.

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