Multifunctional lubricating oil dispenser for unmanned aerial vehicle

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, in particular to a multifunctional lubricating oil filling machine for an unmanned aerial vehicle, which comprises a main pipeline, a control module, and a first two-position three-way electromagnetic valve, an oil filter, a second two-position three-way electromagnetic valve, a plunger type diaphragm pump and a two-position four-way electromagnetic valve which are sequentially arranged on the main pipeline, the control module is used for controlling the first two-position three-way electromagnetic valve, the second two-position three-way electromagnetic valve and the two-position four-way electromagnetic valve to be powered on and powered off so as to control the oiling machine to conduct oil pumping or oiling. Switching of an oil filling mode and an oil pumping mode can be controlled by controlling on-off of the first two-position three-way electromagnetic valve, the second two-position three-way electromagnetic valve and the two-position four-way electromagnetic valve.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, and in particular to a multifunctional lubricating oil refueling machine for unmanned aerial vehicles. Background Art

[0002] Most drones use engines as direct power, and lubricating oil is an important medium to meet engine lubrication and ensure the safe operation of the system. In conventional exercises and training, filling and extracting lubricating oil is an important task in system test preparation.

[0003] According to system design requirements, existing UAV lubricating oil tanks are mostly soft oil tanks made of rubber material, and gravity filling is mainly adopted for filling. That is, the lubricating oil storage tank is placed at a high place and connected to the inlet of the UAV lubricating oil tank through a hose, so that the lubricating oil slowly flows to the lubricating oil tank by gravity to complete the refueling. When the UAV exceeds the service life or needs to replace the oil tank, the lubricating oil is extracted by squeezing the oil tank or using a syringe.

[0004] However, the existing methods of gravity filling of lubricating oil and squeezing oil bag extraction are all primitive manual operations without the use of electromechanical auxiliary means, resulting in primitive and complex methods with low controllability and great safety hazards. It is also easy to introduce impurities into the oil storage tank, reducing the maintainability and operability of the system.

[0005] Therefore, it is necessary to provide a multifunctional lubricating oil refueling machine for unmanned aerial vehicles to solve the above problems. Utility Model Content

[0006] The utility model provides a multifunctional lubricating oil refueling machine for unmanned aerial vehicles. By controlling the on and off of a first two-position three-way solenoid valve, a second two-position three-way solenoid valve and a two-position four-way solenoid valve, the switching between a refueling mode and an oil pumping mode can be controlled to solve the problems of the existing refueling and oil pumping methods being primitive and having a low controllability.

[0007] The utility model is a multifunctional lubricating oil refueling machine for unmanned aerial vehicles adopts the following technical scheme, including:

[0008] A main pipe, one port of which is used to communicate with a lubricating oil barrel, and another port of which is used to communicate with a lubricating oil tank of a UAV; a first two-position three-way solenoid valve, an oil filter, a second two-position three-way solenoid valve, a plunger diaphragm pump and a two-position four-way solenoid valve are sequentially arranged on the main pipe;

[0009] and a control module, which is electrically connected to the first two-position three-way solenoid valve, the second two-position three-way solenoid valve, the plunger diaphragm pump and the two-position four-way solenoid valve, respectively, and is used to control the on and off of the first two-position three-way solenoid valve, the second two-position three-way solenoid valve and the two-position four-way solenoid valve, so as to control the fuel dispenser to pump oil or refuel;

[0010] Among them, one of the other two ports of the two-position four-way solenoid valve is communicated with the third port of the first two-position three-way solenoid valve; and the other port is communicated with the third port of the second two-position three-way solenoid valve.

[0011] Preferably, the flow monitoring unit includes a flow meter, which is arranged on the main line between the two-position four-way solenoid valve and the lubricating oil tank of the drone, and is used to monitor the lubricating oil flow rate when the fuel dispenser is refueling or pumping oil, wherein the flow meter and the control module are electrically connected, and the control module is used to monitor the lubricating oil flow rate when the fuel dispenser is refueling or pumping oil according to the flow meter, and control the refueling amount or control the power on and off of the diaphragm pump.

[0012] Preferably, one end of the main pipeline is provided with a first connector for connecting to a lubricating oil barrel, and the other end of the main pipeline is provided with a second connector for connecting to a lubricating oil tank of a drone.

[0013] Preferably, the first two-position three-way solenoid valve has an A port, a B port and a G port; the second two-position three-way solenoid valve has a C port, a D port and an H port, and the two-position four-way solenoid valve has an E port, an F port, an I port and a J port, wherein the A port and the B port of the first two-position three-way solenoid valve, the C port and the D port of the second two-position three-way solenoid valve, and the E port and the F port of the two-position four-way solenoid valve are sequentially connected in series in the main pipeline.

[0014] Preferably, when the two-position four-way solenoid valve is not energized, only the E port and the F port of the two-position four-way solenoid valve are connected; when the two-position four-way solenoid valve is energized, the E port and the J port of the two-position four-way solenoid valve are connected, and the F port and the I port of the two-position four-way solenoid valve are connected; when the first two-position three-way solenoid valve and the second two-position three-way solenoid valve are not energized, the A port and the B port of the first two-position three-way solenoid valve are connected, and the C port and the D port of the second two-position three-way solenoid valve are connected; when the first two-position three-way valve and the second two-position three-way solenoid valve are energized, the A port and the G port of the first two-position three-way solenoid valve are connected, and the B port is closed; the D port and the H port of the second two-position three-way solenoid valve are connected, and the C port is closed.

[0015] Preferably, the plunger diaphragm pump comprises:

[0016] The pump body has a diaphragm arranged horizontally therein, one side of the diaphragm is connected to a valve core, and the pump body on the side of the diaphragm away from the valve core is provided with two ports, each port is provided with a one-way valve;

[0017] And an electronic plunger is arranged on the pump body, and its output end is coaxially connected with the free end of the valve core after entering the pump body.

[0018] The beneficial effects of the utility model are:

[0019] Through the first two-position three-way solenoid valve, the oil filter, the second two-position three-way solenoid valve, the plunger diaphragm pump, and the two-position four-way solenoid valve on the main pipeline, one of the other two ports of the two-position four-way solenoid valve is connected with the third port of the first two-position three-way solenoid valve; the other port is connected with the third port of the second two-position three-way solenoid valve, and then, when refueling, the first two-position three-way solenoid valve, the second two-position three-way solenoid valve and the two-position four-way solenoid valve are controlled to be de-energized, so that the first two-position three-way solenoid valve, the oil filter, the second two-position three-way solenoid valve, the plunger diaphragm pump, the two-position four-way solenoid valve on the main pipeline are connected to the drone oil. The oil circuit of the tank is connected, so that refueling can be achieved; by controlling the first two-position three-way solenoid valve, the second two-position three-way solenoid valve and the two-position four-way solenoid valve to be energized, the pipelines between the UAV oil tank, two ports of the two-position four-way solenoid valve, the second two-position three-way solenoid valve, the plunger diaphragm pump, the other two ports of the two-position four-way solenoid valve, and the first two-position three-way solenoid valve are connected to form an oil extraction circuit, thereby achieving oil extraction; that is, the utility model can control the switching of the refueling mode and the oil extraction mode by controlling the on and off of the first two-position three-way solenoid valve, the second two-position three-way solenoid valve and the two-position four-way solenoid valve, thereby facilitating oil extraction and refueling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of a multifunctional lubricating oil refueling machine for a drone according to an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of a refueling mode of a multifunctional lubricating oil refueling machine for a UAV according to an embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of an oil pumping mode of a multifunctional lubricating oil refueling machine for a UAV according to an embodiment of the utility model;

[0024] Figure 4 It is a structural schematic diagram of a diaphragm pump in an embodiment of the utility model;

[0025] Figure 5 It is a schematic diagram of the state of the electronic plunger of the diaphragm pump in the embodiment of the utility model when it is contracted;

[0026] Figure 6It is a schematic diagram of the state of the electronic plunger of the diaphragm pump in the embodiment of the utility model when it is extended.

[0027] In the figure: 1. first connector; 2. first two-position three-way solenoid valve; 3. oil filter; 4. second two-position three-way solenoid valve; 5. diaphragm pump; 6. two-position four-way solenoid valve; 7. flow meter; 8. second connector; 9. electronic plunger; 10. pump body; 11. valve core; 12. diaphragm; 13. suction check valve; 14. discharge check valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] An embodiment of a multifunctional lubricating oil refueling machine for a drone of the utility model is as follows: Figure 1 As shown, it includes: a main line, a control module, and a first two-position three-way solenoid valve 2, an oil filter 3, a second two-position three-way solenoid valve 4, a plunger diaphragm pump 5, a two-position four-way solenoid valve 6 and a flow meter 7 which are sequentially arranged on the main line. The oil filter 3 is used to filter the added lubricating oil to ensure the cleanliness of the system. The flow meter 7 is arranged on the main line between the two-position four-way solenoid valve 6 and the lubricating oil tank of the unmanned aerial vehicle, and is used to monitor the lubricating oil flow rate when the tanker is refueling or pumping oil. One port of the main line is used to communicate with the lubricating oil barrel, and the other port is used to communicate with the lubricating oil tank of the unmanned aerial vehicle; the control module is a control panel, and the control panel is respectively connected to the first two-position three-way solenoid valve The magnetic valve 2, the second two-position three-way solenoid valve 4, the plunger diaphragm pump 5, the two-position four-way solenoid valve 6 and the flow meter 7 are electrically connected, wherein the control module is used to monitor the lubricating oil flow rate of the fuel dispenser when refueling or pumping oil according to the flow meter 7, control the refueling amount or control the on and off of the diaphragm pump, and control the on and off of the first two-position three-way solenoid valve 2, the second two-position three-way solenoid valve 4 and the two-position four-way solenoid valve 6 to control the fuel dispenser to pump oil or refuel; wherein, one of the other two ports of the two-position four-way solenoid valve 6 is connected to the third port of the first two-position three-way solenoid valve 2; and the other port is connected to the third port of the second two-position three-way solenoid valve 4.

[0030] like Figure 1 As shown, in this embodiment, one end of the main pipeline is provided with a first connector 1 for connecting to a lubricating oil barrel, and the other end of the main pipeline is provided with a second connector 8 for connecting to a lubricating oil tank of a drone.

[0031] like Figure 2 and Figure 3 As shown, specifically, the first two-position three-way solenoid valve 2 has an A port, a B port and a G port; the second two-position three-way solenoid valve 4 has a C port, a D port and an H port, and the two-position four-way solenoid valve 6 has an E port, an F port, an I port and a J port, wherein the A port and the B port of the first two-position three-way solenoid valve 2, the C port and the D port of the second two-position three-way solenoid valve 4, and the E port and the F port of the two-position four-way solenoid valve 6 are sequentially connected in series in the main pipeline from the first connector 1 to the second connector 8.

[0032] Specifically, when the two-position four-way solenoid valve 6 is not energized, only the E port and the F port of the two-position four-way solenoid valve are connected; when the two-position four-way solenoid valve 6 is energized, the E port and the J port of the two-position four-way solenoid valve are connected, and the F port and the I port are connected; when the first two-position three-way solenoid valve 2 and the second two-position three-way solenoid valve 4 are not energized, the A port and the B port of the first two-position three-way solenoid valve 2 are connected, and the C port and the D port of the second two-position three-way solenoid valve 4 are connected; when the first two-position three-way solenoid valve 2 and the second two-position three-way solenoid valve 4 are energized, the A port and the G port of the first two-position three-way solenoid valve 2 are connected, and the B port is closed; the D port and the H port of the second two-position three-way solenoid valve 4 are connected, and the D port is closed.

[0033] Specifically, Figure 4 As shown, the plunger diaphragm pump 5 includes: a pump body 10 and an electronic plunger 9, a diaphragm sheet 12 is horizontally arranged in the pump body 10, one side of the diaphragm sheet 12 is connected to a valve core 11, and the pump body 10 on the side of the diaphragm sheet 12 away from the valve core 11 is provided with two ports, each port is provided with a one-way valve, such as Figure 4 As shown, in this embodiment, a suction check valve 13 is provided in one port of the pump body 10, and a discharge check valve 14 is provided in the other port. The port of the suction check valve 13 is arranged toward the first connector 1 and is connected to the main pipe, and the port of the suction check valve 13 is arranged toward the second connector 8 and is connected to the main pipe; the electronic plunger 9 is arranged on the pump body 10, and the output end of the electronic plunger 9 enters the pump body 10 and is coaxially connected to the free end of the valve core 11.

[0034] It should be noted that if Figure 5 and Figure 6 As shown, the diaphragm pump 5 can realize non-contact filling of lubricating oil (high viscosity). When the diaphragm pump 5 is working, the lubricating oil only contacts the pump body, the suction check valve 13, the discharge check valve 14 and one side of the diaphragm 12, and does not contact the moving electronic plunger 9 and the valve core 11. This ensures the quality of the oil and prevents the oil from deteriorating due to the wear of the pump body 10 caused by overheating and the movement of the electronic plunger 9. At the same time, the power-on frequency of the electronic plunger 9 can be controlled according to actual use requirements to adjust the working frequency of the diaphragm pump 5, so as to realize the control of the refueling and pumping speed. Figure 5As shown, the electronic plunger 9 is controlled to drive the valve core 11 to move upward, and the electronic plunger 9 drives the diaphragm 12 to move upward through the valve core 11, so that the pressure P in the cavity of the pump body 10 below the diaphragm 12 is reduced. At this time, the pressure of the main line is greater than the pressure of the cavity of the pump body 10, so the suction check valve 13 is automatically opened, and the discharge check valve 14 is automatically closed. The lubricating oil in the main line is sucked into the pump body 10 under the action of the internal and external pressures; Figure 6 As shown, the electronic plunger 9 is then controlled to move downward, and the valve core 11 connected to the electronic plunger 9 drives the diaphragm 12 to move downward, so that the pressure P in the cavity of the pump body 10 on the lower side of the diaphragm 12 increases. At this time, the suction check valve 13 is automatically closed and the discharge check valve 14 is automatically opened. Under the action of internal and external pressures, the lubricating oil flows out of the pump body 10 from the port where the discharge check valve 14 is located.

[0035] Secondly, in this embodiment, the power source is a battery, which supplies power to the entire fuel dispenser. When the lubricating oil flow rate collected by the flow meter 7 during oil pumping reaches the preset lubricating oil flow rate threshold 0, the control module can control the battery to cut off the power, thereby cutting off the power of the diaphragm pump 5.

[0036] Specific working principle

[0037] Refueling mode:

[0038] like Figure 2 As shown, the oil filling mode works and the lubricating oil flows as follows Figure 4 As shown by the solid arrows, at this time, the first two-position three-way solenoid valve 2, the second two-position three-way solenoid valve 4, and the two-position four-way solenoid valve 6 are all de-energized through the control panel, that is, the first two-position three-way solenoid valve 2 is in the A port and B port conduction mode, the second two-position three-way solenoid valve 4 is in the C port and D port conduction mode, and the two-position four-way solenoid valve 6 is in the E port and J port conduction mode; the lubricating oil flow direction is: lubricating oil barrel → first connector 1 → A port of the first two-position three-way solenoid valve 2 → B port of the first two-position three-way solenoid valve 2 → oil filter 3 → C port of the second two-position three-way solenoid valve 4 → D port of the second two-position three-way solenoid valve 4 → the port where the suction check valve 13 of the diaphragm pump 5 is located → the port where the discharge check valve 14 of the diaphragm pump 5 is located → E port of the two-position four-way solenoid valve 6 → J port of the two-position four-way solenoid valve 6 → flow meter 7 → second connector 8 → UAV lubricating oil tank.

[0039] It should be noted that if the unmanned lubricating oil tank is a sealed oil tank without a vent hole (oil overflow hole), the second connector 8 can be placed in the lubricating oil barrel before filling, and the filling operation can be performed after the main line is filled with lubricating oil to avoid adding gas in the main line into the sealed oil tank.

[0040] Pumping mode:

[0041] like Figure 3As shown in the figure, when the oil pumping mode is working, the lubricating oil flows as follows Figure 3 As shown by the dotted arrows, at this time, the first two-position three-way solenoid valve 2, the second two-position three-way solenoid valve 4, and the two-position four-way solenoid valve 6 are energized through the control panel, that is, the first two-position three-way solenoid valve 2 is in the A port and G port conduction mode, and the second two-position three-way solenoid valve 4 is in the D port and H port conduction mode; the two-position four-way solenoid valve 6 is in the E port and J port conduction mode and the F port and I port conduction mode; the lubricating oil flow direction is: UAV lubricating oil tank → second connector 8 → flow meter 7 → F port to I port of the two-position four-way solenoid valve 6 → H port to D port of the second two-position three-way solenoid valve → diaphragm pump 5 → E port to J port of the two-position four-way solenoid valve 6 → G port to A port of the first two-position three-way solenoid valve 2 → first connector 1 → lubricating oil barrel.

[0042] It should be noted that when a fatal failure occurs in the UAV (engine), it may be necessary to analyze and identify the lubricating oil in the UAV lubricating oil tank. Therefore, the oil extraction circuit does not pass through the oil filter 3 to prevent possible impurities from being accidentally filtered out and affecting the fault analysis. The diaphragm pump 5 can not only realize the filling or extraction of lubricating oil, but also the filling or extraction of gas. If it is necessary to completely empty the residual lubricating oil in the UAV lubricating oil tank (including the pipeline), the oil-free automatic shutdown function of the flow meter 7 can be shielded in the control panel until there is no lubricating oil flowing out of the main pipeline and then the power is turned off.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional lubricating oil dispenser for unmanned aerial vehicles, characterized in that: include: A main pipeline, one port of which is used to communicate with a lubricating oil barrel, and the other port of which is used to communicate with a lubricating oil tank of a drone; the main pipeline is provided with a first two-position three-way solenoid valve (2), an oil filter (3), a second two-position three-way solenoid valve (4), a plunger diaphragm pump (5), and a two-position four-way solenoid valve (6) in sequence; and a control module, which is electrically connected to the first two-position three-way solenoid valve (2), the second two-position three-way solenoid valve (4), the plunger diaphragm pump (5) and the two-position four-way solenoid valve (6) respectively, and is used to control the on and off of the first two-position three-way solenoid valve (2), the second two-position three-way solenoid valve (4) and the two-position four-way solenoid valve (6), so as to control the fuel dispenser to pump oil or refuel; Among them, one of the other two ports of the two-position four-way solenoid valve (6) is in communication with the third port of the first two-position three-way solenoid valve (2); and the other port is in communication with the third port of the second two-position three-way solenoid valve (4).

2. A multifunctional lubricating oil dispenser for UAV according to claim 1, characterized in that: It also includes a flow meter (7), which is arranged on the main pipe between the two-position four-way solenoid valve (6) and the lubricating oil tank of the unmanned aerial vehicle, and is used to monitor the flow rate of the lubricating oil when the refueling machine is refueling or pumping oil, wherein the flow meter (7) is electrically connected to the control module, and the control module is used to monitor the flow rate of the lubricating oil when the refueling machine is refueling or pumping oil according to the flow meter (7), and control the refueling amount or control the on and off of the diaphragm pump (5).

3. The multifunctional lubricating oil dispenser for unmanned aerial vehicles according to claim 1, characterized in that: One end of the main pipeline is provided with a first connector (1) for connecting to a lubricating oil barrel, and the other end of the main pipeline is provided with a second connector (8) for connecting to a lubricating oil tank of a drone.

4. The multifunctional lubricating oil dispenser for unmanned aerial vehicles according to claim 1, characterized in that: The first two-position three-way solenoid valve (2) has an A port, a B port and a G port; the second two-position three-way solenoid valve (4) has a C port, a D port and an H port; and the two-position four-way solenoid valve (6) has an E port, an F port, an I port and a J port, wherein the A port and the B port of the first two-position three-way solenoid valve (2), the C port and the D port of the second two-position three-way solenoid valve (4) and the E port and the F port of the two-position four-way solenoid valve (6) are sequentially connected in series in the main pipeline.

5. The multifunctional lubricating oil dispenser for unmanned aerial vehicles according to claim 4, characterized in that: When the two-position four-way solenoid valve (6) is not energized, only the E port and the F port of the two-position four-way solenoid valve are connected; when the two-position four-way solenoid valve (6) is energized, the E port and the J port of the two-position four-way solenoid valve are connected, and the F port and the I port of the two-position four-way solenoid valve are connected; when the first two-position three-way solenoid valve (2) and the second two-position three-way solenoid valve (4) are not energized, the A port and the B port of the first two-position three-way solenoid valve (2) are connected, and the C port and the D port of the second two-position three-way solenoid valve (4) are connected; when the first two-position three-way solenoid valve (2) and the second two-position three-way solenoid valve (4) are energized, the A port and the G port of the first two-position three-way solenoid valve (2) are connected, and the B port is closed; the D port and the H port of the second two-position three-way solenoid valve (4) are connected, and the C port is closed.

6. The multifunctional lubricating oil dispenser for unmanned aerial vehicles according to claim 1, characterized in that: The plunger diaphragm pump (5) comprises: A pump body (10) having a diaphragm (12) arranged horizontally therein, one side of the diaphragm (12) being connected to a valve core (11), and the pump body (10) on the side of the diaphragm (12) facing away from the valve core (11) being provided with two ports, each port being provided with a one-way valve; And an electronic plunger (9) is arranged on the pump body (10), and its output end is coaxially connected to the free end of the valve core (11) after entering the pump body (10).

Images