Fuel mixing equipment for unmanned aerial vehicle

Abstract

The invention provides fuel mixing equipment for an unmanned aerial vehicle. The fuel mixing equipment comprises a mixing barrel body, a cover plate, a self-priming pump, an oil inlet pipeline, a control mechanism, a three-way valve, a first pipeline, a second pipeline and a plurality of vibration supporting structures, the mixing barrel is internally used for mixing fuel oil, and the cover plate is used for covering an opening in the top of the mixing barrel; the ends of the oil inlet pipeline, the first pipeline and the second pipeline are connected with a three-way valve, the three-way valve is arranged outside the cover plate, and the ends, away from the three-way valve, of the first pipeline and the second pipeline are arranged inside the mixing barrel; the self-priming pump is arranged on the first pipeline and is connected with the control mechanism; the plurality of vibration supporting structures are circumferentially and uniformly arranged at the bottom of the mixing barrel body. According to the fuel mixing equipment for the unmanned aerial vehicle, the problems that time and labor are consumed in the fuel mixing process and non-uniform mixing possibly occurs due to the fact that fuel is manually shaken up for mixing in related technologies are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of UAV fuel mixing, and in particular relates to a fuel mixing device for UAVs. Background Art

[0002] In UAV technology, the lubrication of the engine is a very crucial link. For such non-independent lubrication UAV engines, fuel and lubricating oil need to be mixed in a specific ratio before refueling, and this process is crucial for the normal operation of the engine. Since UAVs often work in various environments, ensuring the perfect mixing of fuel and lubricating oil can effectively improve engine performance, reduce wear, and extend service life.

[0003] The engine design of UAVs usually emphasizes lightweight and high efficiency, so it is extremely important to select the appropriate fuel and lubricating oil ratio. This mixing technology requires operators to have certain professional knowledge to ensure the accuracy and uniformity of the mixing ratio. Correct mixing can not only ensure the stable operation of the engine, but also prevent engine failures caused by poor lubrication. Since the related technology relies on manual shaking of fuel for mixing, the fuel mixing process is time-consuming and laborious, and there may be problems of uneven mixing. Since related electric devices usually use shaft-driven stirring rods for rotational mixing, there is a risk of ignition caused by conductive sparking through the transmission shaft. In addition, there may be a situation of poor sealing during the shaft transmission process, resulting in oil leakage and triggering safety risks. At the same time, the shaft-driven stirring equipment requires frequent maintenance, so the use cost is relatively high. Summary of the Invention

[0004] In view of this, the present invention aims to solve at least one of the related technical problems to some extent.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] A fuel mixing device for UAVs, comprising a mixing barrel body, a cover plate, a self-priming pump, an oil inlet pipeline, a control mechanism, a three-way valve, a first pipeline, a second pipeline, and a plurality of vibration support structures;

[0007] The interior of the mixing barrel body is used for mixing fuel, and the cover plate is used to cover the opening at the top of the mixing barrel body;

[0008] The ends of the oil inlet pipeline, the first pipeline, and the second pipeline are all connected to the three-way valve. The three-way valve is arranged outside the cover plate, and the ends of the first pipeline and the second pipeline away from the three-way valve are both arranged inside the mixing barrel body;

[0009] The self-priming pump is arranged on the first pipeline and is connected to the control mechanism;

[0010] A plurality of the vibration support structures are arranged in a circumferentially uniform manner at the bottom of the mixing barrel body. The vibration support structures are used for elastically supporting the mixing barrel body. When vibration occurs inside the mixing barrel body, a reciprocating swinging motion can be generated to promote fuel mixing.

[0011] Further, the second pipeline includes a fuel inlet pipe and a single-arm rotary oil delivery mechanism. One end of the fuel inlet pipe is connected to the three-way valve, and the other end of the fuel inlet pipe is connected to the single-arm rotary oil delivery mechanism. The single-arm rotary oil delivery mechanism is arranged inside the mixing barrel body.

[0012] Further, the single-arm rotary oil delivery mechanism includes a rotating structure, an L-shaped elbow pipe, and a fuel spray head. One end of the L-shaped elbow pipe is connected to the fuel inlet pipe through the rotating structure, and the other end of the L-shaped elbow pipe is connected to the fuel spray head through a flange plate.

[0013] Further, the single-arm rotary oil delivery mechanism further includes a counterweight block, and the counterweight block is arranged at the outlet end of the L-shaped elbow pipe.

[0014] Further, the rotating structure includes a connecting sleeve, a rotating sleeve, and a flanging structure. The connecting sleeve is arranged at the end of the fuel inlet pipe, the rotating sleeve is arranged at the end of the L-shaped elbow pipe, an annular groove with an L-shaped cross-section is arranged on the outer side of the connecting sleeve, and the top of the rotating sleeve is rotationally matched with the annular groove through the flanging structure.

[0015] Further, an anti-static structure is further included. The anti-static structure includes an annular brush and a grounding wire. The annular brush is arranged on the fuel spray head, one end of the grounding wire is connected to the annular brush, and the other end of the grounding wire is arranged outside the mixing barrel body.

[0016] Further, the vibration support structure includes a support seat, a fixed seat, a support rod, a first vibration spring, a second vibration spring, a pressing piece, and a nut. The bottom of the support rod penetrates through the support seat and is threadedly connected to the upper end surface of the fixed seat. The pressing piece and the nut are arranged at the top of the support rod. The first vibration spring is arranged between the support seat and the fixed seat, and the second vibration spring is arranged between the support seat and the pressing piece. Both the first vibration spring and the second vibration spring are sleeved on the support rod.

[0017] Further, the number of the vibration support structures is 4.

[0018] Further, a filter is arranged at the end of the first pipeline inside the mixing barrel body.

[0019] Further, the end of the second pipeline inside the mixing barrel body is higher than the end of the first pipeline inside the mixing barrel body.

[0020] Compared with the prior art, the fuel mixing device for drones according to the present invention has the following advantages:

[0021] 1. Through the action of the self-priming pump in the first pipeline, the fuel can be effectively pumped out from the bottom of the mixing barrel and re-introduced. By means of the circulation method, the fuel and lubricating oil are mixed more evenly. The automated oil suction and circulation reduce the dependence on manual stirring, lower the working intensity, and improve the efficiency. Through the closed circulation inside the pipeline, the risk of fuel leakage or volatilization caused by manual stirring is reduced, and the safety is improved.

[0022] 2. The rotational movement of the single-arm rotary oil delivery mechanism causes the barrel to vibrate. Through this moderate vibration, the mixing process of the fuel and lubricating oil can be accelerated, and the mixing efficiency can be improved. Although the single-arm rotation will cause dynamic imbalance, by cooperating with the vibration support structure at the bottom of the barrel, the sway amplitude of the barrel can be effectively controlled, and this vibration can be transformed into the power to promote mixing. The combined action of vibration and rotation can make the liquid in the barrel flow and disperse more evenly, thereby improving the uniformity and consistency of the final mixture. Since the vibration enhances the fluidity of the internal liquid, the precipitation of fuel and lubricating oil at the bottom of the barrel is reduced, ensuring the quality and accuracy of each mixing. The mixing time of the fuel is greatly shortened, enabling the device to complete the task more quickly and improving the overall working efficiency.

[0023] 3. The moderate vibration of the vibration support structure helps to accelerate the mixing process of the fuel and lubricating oil and improve the mixing efficiency. Through vibration, the liquid flows and disperses more evenly in the barrel, thereby improving the mixing uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 Schematic diagram of a fuel mixing device for drones according to an embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the combined structure of the first pipeline, the second pipeline and the three-way valve according to an embodiment of the present invention;

[0027] Figure 3 Schematic diagram of the single-arm rotary oil delivery mechanism according to an embodiment of the present invention;

[0028] Figure 4 Schematic diagram of the rotation structure according to an embodiment of the present invention;

[0029] Figure 5 Schematic diagram of the vibration support structure according to an embodiment of the present invention.

[0030] Description of the reference numerals:

[0031] 100, mixing barrel body; 110, cover plate; 200, control mechanism; 210, oil inlet pipeline; 220, first pipeline; 230, self-priming pump; 240, three-way valve; 300, fixing seat; 310, first vibration spring; 400, L-shaped elbow; 410, counterweight; 420, flange plate; 430, fuel injector; 500, rotating structure; 510, connecting sleeve; 520, rotating sleeve; 600, support seat; 610, second vibration spring; 620, pressing piece; 630, nut. Detailed implementation manners

[0032] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0035] The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0036] A fuel mixing device for an unmanned aerial vehicle, as Figure 1As shown in the figure, it includes a mixing barrel body 100, a cover plate 110, a self-priming pump 230, an oil inlet pipeline 210, a control mechanism 200, a three-way valve 240, a first pipeline 220, a second pipeline and a plurality of vibration support structures; the inside of the mixing barrel body 100 is used for mixing fuel oil, and the cover plate 110 is used to cover the opening at the top of the mixing barrel body 100; the ends of the oil inlet pipeline 210, the first pipeline 220 and the second pipeline are all connected to the three-way valve 240, the three-way valve 240 is arranged outside the cover plate 110, and the ends of the first pipeline 220 and the second pipeline away from the three-way valve 240 are both arranged inside the mixing barrel body 100; the self-priming pump 230 is arranged on the first pipeline 220, and the self-priming pump 230 is connected to the control mechanism 200; the end of the first pipeline 220 arranged inside the mixing barrel body 100 is provided with a filter. The end of the second pipeline located inside the mixing barrel body 100 is higher than the end of the first pipeline 220 located inside the mixing barrel body 100. The control mechanism 200 is an existing single-chip microcomputer. Through the action of the self-priming pump 230 in the first pipeline 220, the fuel oil can be effectively pumped out from the bottom of the mixing barrel body 100 and re-introduced, and the fuel oil and lubricating oil can be mixed more evenly in a circulating manner. The automated oil suction cycle reduces the dependence on manual stirring, reduces the labor intensity, and improves the efficiency. Through the closed circulation inside the pipeline, the risk of fuel oil leakage or volatilization caused by manual stirring is reduced, and the safety is improved. The three-way valve 240 is an existing electrically controlled three-way valve, and the three-way valve 240 is connected to the control mechanism 200.

[0037] The second pipeline includes a fuel inlet pipe and a single-arm rotary oil delivery mechanism. One end of the fuel inlet pipe is connected to the three-way valve 240, the other end of the fuel inlet pipe is connected to the single-arm rotary oil delivery mechanism, and the single-arm rotary oil delivery mechanism is arranged inside the mixing barrel body 100.

[0038] Such as Figure 3As shown in the figure, the single-arm rotary oil delivery mechanism includes a rotary structure 500, an L-shaped elbow 400, and a fuel nozzle 430. One end of the L-shaped elbow 400 is connected to the fuel inlet pipe through the rotary structure 500, and the other end of the L-shaped elbow 400 is connected to the fuel nozzle 430 through a flange plate 420. The single-arm rotary oil delivery mechanism also includes a counterweight 410, which is arranged at the outlet end of the L-shaped elbow 400. It also includes an anti-static structure (not shown in the drawings). The anti-static structure includes an annular brush and a grounding wire. The annular brush is arranged on the fuel nozzle 430. One end of the grounding wire is connected to the annular brush and extends out at the opening of the mixing barrel 100. The other end of the grounding wire is arranged outside the mixing barrel 100, and the grounding wire is made of copper wire. In actual use, another connection method can also be adopted, that is, the end of the grounding wire far from the annular brush is connected to the inner wall of the mixing barrel 100. The mixing barrel 100 and the vibration support structure are both made of metal materials, which can also achieve the grounding effect. The rotary motion of the single-arm rotary oil delivery mechanism causes the barrel to vibrate. Through this appropriate vibration, the mixing process of fuel and lubricating oil can be accelerated, and the mixing efficiency can be improved. Although the single-arm rotation will cause dynamic imbalance, by cooperating with the vibration support structure at the bottom of the barrel, the shaking amplitude of the barrel can be effectively controlled, and this vibration can be converted into the power to promote mixing. The combined action of vibration and rotation can make the liquid in the barrel flow and disperse more evenly, thereby improving the uniformity and consistency of the final mixture. Since the vibration enhances the fluidity of the internal liquid and reduces the precipitation of fuel and lubricating oil at the bottom of the barrel, the quality and accuracy of each mixing are ensured. It makes the fuel in the barrel rotate to form a horizontal and vertical stirring state, achieving the purpose of mixing fuel, greatly shortening the mixing time of fuel, enabling the equipment to complete tasks more quickly, and improving the overall working efficiency.

[0039] As Figure 4 shown in the figure, the rotary structure 500 includes a connecting sleeve 510, a rotary sleeve 520, and a flanging structure. The connecting sleeve 510 is arranged at the end of the fuel inlet pipe, and the rotary sleeve 520 is arranged at the end of the L-shaped elbow 400. The rotary sleeve 520 is integrally connected to the L-shaped elbow 400. An annular groove with an L-shaped cross-section is arranged on the outer side of the connecting sleeve 510. The top of the rotary sleeve 520 is rotationally matched with the annular groove through the flanging structure.

[0040] A plurality of vibration support structures are arranged in a circumferentially uniform manner at the bottom of the mixing barrel 100. The vibration support structure is used to elastically support the mixing barrel 100. When vibrations occur inside the mixing barrel 100, a reciprocating swinging motion can be generated to promote fuel mixing. In this example, the number of vibration support structures is 4. As Figure 5As shown in the figure, the vibration support structure includes a support base 600, a fixed base 300, a support rod, a first vibration spring 310, a second vibration spring 610, a pressing plate 620 and a nut 630. The bottom of the support rod passes through the support base 600 and is threadedly connected to the upper end surface of the fixed base 300. The top of the support rod is provided with a pressing plate 620 and a nut 630. The first vibration spring 310 is arranged between the support base 600 and the fixed base 300, and the second vibration spring 610 is arranged between the support base 600 and the pressing plate 620. Both the first vibration spring 310 and the second vibration spring 610 are sleeved on the support rod. Appropriate vibration of the vibration support structure helps to accelerate the mixing process of fuel and lubricating oil and improve the mixing efficiency. Through vibration, the liquid flows and disperses more evenly in the barrel, thereby improving the uniformity of mixing.

[0041] Working mode of this example

[0042] 1. There are two methods to add fuel:

[0043] (1) Pour the fuel to be mixed directly into the barrel in a predetermined proportion;

[0044] (2) Connect the fuel to be added to the fuel inlet pipeline 210, set the input of the control mechanism 200 (the three-way valve 240 connects the first pipeline 220 with the fuel inlet pipeline 210, and the self-priming pump 230 rotates in reverse), set the dosage and input speed, start the equipment, the fuel enters from the fuel inlet pipeline 210 through the self-priming pump 230 and is discharged into the barrel through the first pipeline 220, and automatically stops when the set amount is reached (using a specific function, the remaining fuel after UAV operation can be recovered into the mixing barrel 100).

[0045] 2. Method of mixing fuel: Set the controller to mix (the three-way valve 240 connects the first pipeline 220 with the second pipeline, and the self-priming pump 230 rotates forward), set the mixing speed and time, start the equipment, the fuel will enter from the first pipeline 220 and be sprayed out from the second pipeline. The fuel spray head 430 of the second pipeline sprays in a tangential direction along the barrel wall in a waterfall manner. Due to the spraying speed of the fuel, the fuel in the barrel will rotate along the spraying direction and generate eddies, thus accelerating the mixing. At the same time, the fuel is pumped into from the lower part of the first pipeline 220 and discharged from the bottom of the second pipeline, which also accelerates the flow and mixing of the fuel. During the process, the fuel needs to flow through the filter, and the internal impurities are filtered multiple times to improve the cleanliness of the fuel.

[0046] 3. Fuel Output: Set the controller output (the three-way valve 240 connects the first pipeline 220 to the fuel inlet pipeline 210, and the self-priming pump 230 rotates forward), set the output speed and quantity, start the equipment, the fuel in the barrel enters through the first pipeline 220 and is output to the drone through the fuel inlet pipeline 210. A pressure gauge and a flow meter are provided on the fuel inlet pipeline 210, and both the pressure gauge and the flow meter are connected to the single-chip microcomputer. The single-chip microcomputer has a timing function. The quantity is based on the user's set value and automatically stops after completion. The quantitative measurement is achieved by accumulating the fuel flow through the flow meter, and the speed is controlled by the single-chip microcomputer to control the motor speed. The pressure gauge mainly cooperates with functions such as the nozzle of a fuel dispenser jumping or a mechanical valve closing at the rear end. After the single-chip microcomputer detects that the pressure of the pressure gauge reaches the set value, to protect the safety of the pump body and pipeline, the fuel pump is automatically shut off. When the pressure in the fuel inlet pipeline 210 reaches the set value, it is considered that there is a pipeline fault or the valve at the output port is closed, and the controller sends a signal to stop the self-priming pump 230.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fuel mixing device for an unmanned aerial vehicle, characterized in that: It comprises a mixing barrel (100), a cover plate (110), a self-priming pump (230), an oil inlet pipeline (210), a control mechanism (200), a three-way valve (240), a first pipeline (220), a second pipeline and a plurality of vibration support structures; The interior of the mixing barrel (100) is used for mixing fuel oil, and the cover plate (110) is used for covering the opening at the top of the mixing barrel (100); The ends of the oil inlet pipeline (210), the first pipeline (220) and the second pipeline are all connected to the three-way valve (240); the three-way valve (240) is arranged outside the cover plate (110); the ends of the first pipeline (220) and the second pipeline away from the three-way valve (240) are both arranged inside the mixing barrel body (100); The self-priming pump (230) is arranged on the first pipeline (220), and the self-priming pump (230) is connected to the control mechanism (200); A plurality of the vibration support structures are evenly arranged in a circumference at the bottom of the mixing barrel (100), and the vibration support structures are used to elastically support the mixing barrel (100). When vibration is generated inside the mixing barrel (100), reciprocating swinging motion can be generated to promote fuel mixing; The vibration support structure comprises a support seat (600), a fixed seat (300), a support rod, a first vibration spring (310), a second vibration spring (610), a pressing plate (620) and a nut (630); the bottom of the support rod passes through the support seat (600) and is threadedly connected to the upper end surface of the fixed seat (300); the pressing plate (620) and the nut (630) are arranged on the top of the support rod; the first vibration spring (310) is arranged between the support seat (600) and the fixed seat (300); the second vibration spring (610) is arranged between the support seat (600) and the pressing plate (620); and the first vibration spring (310) and the second vibration spring (610) are both sleeved on the support rod.

2. A fuel mixing device for an unmanned aerial vehicle according to claim 1, characterized in that: The second pipeline comprises a fuel inlet pipe and a single-arm rotating oil delivery mechanism, one end of the fuel inlet pipe is connected to the three-way valve (240), and the other end of the fuel inlet pipe is connected to the single-arm rotating oil delivery mechanism, and the single-arm rotating oil delivery mechanism is arranged inside the mixing barrel body (100).

3. A fuel mixing device for an unmanned aerial vehicle according to claim 2, characterized in that: The single-arm rotary oil delivery mechanism comprises a rotary structure (500), an L-shaped curved pipe (400) and a fuel nozzle (430); one end of the L-shaped curved pipe (400) is connected to the fuel inlet pipe through the rotary structure (500); and the other end of the L-shaped curved pipe (400) is connected to the fuel nozzle (430) through a flange plate (420).

4. A fuel mixing device for a drone according to claim 3, characterized in that: The single-arm rotary oil delivery mechanism further comprises a counterweight block (410), and the counterweight block (410) is arranged at the outlet end of the L-shaped curved pipe (400).

5. A fuel mixing device for a drone according to claim 3, characterized in that: The rotating structure (500) comprises a connecting sleeve (510), a rotating sleeve (520) and a flange structure. The connecting sleeve (510) is arranged at the end of the fuel inlet pipe, and the rotating sleeve (520) is arranged at the end of the L-shaped elbow (400). An annular groove with an L-shaped cross section is arranged on the outer side of the connecting sleeve (510), and the top of the rotating sleeve (520) is rotatably matched with the annular groove through the flange structure.

6. A fuel mixing device for an unmanned aerial vehicle according to claim 3, characterized in that: It also includes an antistatic structure, which includes an annular brush and a grounding wire. The annular brush is arranged on the fuel nozzle (430), one end of the grounding wire is connected to the annular brush, and the other end of the grounding wire is arranged outside the mixing barrel (100).

7. A fuel mixing device for a drone according to any one of claims 1 to 6, characterized in that: The number of the vibration support structures is 4.

8. A fuel mixing device for an unmanned aerial vehicle according to claim 7, characterized in that: The first pipeline (220) is provided with a filter at the end portion inside the mixing barrel body (100).

9. A fuel mixing device for an unmanned aerial vehicle according to claim 7, characterized in that: The end of the second pipeline located inside the mixing barrel body (100) is higher than the end of the first pipeline (220) located inside the mixing barrel body (100).

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