Refueling device for soft fuel tank of aircraft

Abstract

The invention discloses a refueling device for a soft fuel tank of an aircraft. The oil storage barrel is mounted on the base and provided with an oil inlet pipe, and a first stop valve is mounted on the oil inlet pipe; the air compressor is installed on the base, an air outlet pipe of the air compressor and the upper end of the oil storage barrel are connected with an oiling connector, the first end of the oiling connector is used for being connected with the oiling connector, and the second end of the oiling connector is connected with the lower end of the oil storage barrel through an oiling pipe; the recovery tank is mounted on the base; the first end of the suction pipe is located on the outer side of the first end of the refueling connector, and the second end of the suction pipe extends into the refueling connector and then penetrates out of the side wall of the refueling connector; one end of the suction pipe is connected with the second end of the suction pipe, and the other end is connected with the recovery tank; and the suction pump is arranged on the back suction pipe. The refueling device can ensure that air is discharged from the aircraft soft oil tank during refueling, so that the aircraft soft oil tank does not need to be provided with an exhaust pipe and an exhaust valve, and the occupied space and the weight of an aircraft can be reduced.

Description

Technical Field

[0001] The invention relates to the field of refueling equipment, in particular to a refueling device for an aircraft soft fuel tank. Background Art

[0002] When refueling an unmanned aerial vehicle, a fuel pump is used to refuel the fuel tank. During refueling, air is generated during the friction of the fuel due to the use of mechanical gears and blades. Therefore, exhaust structures such as exhaust pipes and exhaust valves are installed on the soft fuel tank of the unmanned aerial vehicle. The installation of the exhaust structure not only takes up space in the aircraft, but also increases the weight of the aircraft. Summary of the invention

[0003] In view of the above problems, the present invention provides a refueling device for an aircraft soft fuel tank.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A refueling device for an aircraft soft fuel tank, wherein the upper portion of the aircraft soft fuel tank only has a refueling interface, and the refueling device comprises:

[0006] Base;

[0007] An oil storage barrel is installed on the base, and the oil storage barrel has an oil inlet pipe, and a first stop valve is installed on the oil inlet pipe;

[0008] The air compressor is installed on the base, and the air outlet pipe of the air compressor is connected to the upper end of the oil storage barrel.

[0009] A refueling connector, the first end of which is used to be connected to the refueling interface, and the second end of which is connected to the lower end of the oil storage barrel through a refueling pipe;

[0010] a recovery tank, mounted on a base;

[0011] A suction pipe, wherein the first end of the suction pipe is located outside the first end of the refueling connector, and the second end of the suction pipe extends into the refueling connector and then passes through the side wall of the refueling connector;

[0012] A suction return pipe, one end of which is connected to the second end of the suction pipe and the other end of which is connected to the recovery tank;

[0013] A suction pump is installed on the return suction pipe.

[0014] A working principle of the refueling device of the present application is as follows: the refueling connector is installed on the refueling interface of the aircraft soft fuel tank. At this time, the first end of the suction pipe is located in the uppermost space of the aircraft soft fuel tank through the refueling interface. Then the air compressor works, and the pressurized gas enters the top of the oil storage barrel, and the fuel in the oil storage barrel is pressed into the oil inlet pipe, and finally injected into the aircraft soft fuel tank through the refueling connector. The oil filling through the air compressor can reduce the amount of air entering the aircraft soft fuel tank compared to the gear pump. Finally, the suction pump works, and a small amount of air mixed with part of the fuel in the upper part of the aircraft soft fuel tank is sucked into the recovery tank through the suction pipe.

[0015] The refueling device of the present application can ensure that air is discharged from the aircraft soft fuel tank during refueling, so that the aircraft soft fuel tank does not need to be provided with an exhaust pipe and an exhaust valve, which can reduce space occupancy and reduce the weight of the aircraft.

[0016] In actual use, the fuel pump can be connected to the oil inlet pipe of the oil storage barrel through a pipeline to transport the fuel with air into the oil storage barrel.

[0017] In actual use, a sealing cover is detachably mounted on the fuel filling port of the aircraft soft fuel tank of the present application.

[0018] In one embodiment of the present invention, a liquid level indicating structure is installed on the oil storage barrel.

[0019] The fuel in the oil storage tank can be checked through the liquid level indication structure, which facilitates and ensures reliable refueling operation.

[0020] In one embodiment of the present invention, the liquid level indicating structure is a transparent area disposed on the oil storage barrel and arranged in an upper and lower manner.

[0021] This setting allows you to view the amount of fuel in the fuel tank very intuitively.

[0022] In one embodiment of the present invention, the liquid level indicating structure includes a liquid level sensor and a display screen for displaying numbers of the liquid level sensor.

[0023] In one embodiment of the present invention, it also includes a delivery pump, a first pipeline and a second stop valve, one end of the first pipeline is connected to the lower end of the recovery tank, and the other end is connected to the upper end of the oil storage barrel, and the delivery pump and the second stop valve are installed on the first pipeline.

[0024] The fuel in the recovery tank can be delivered to the oil storage tank through the first pipeline and the delivery pump. In actual use, when the air compressor is working, the first stop valve and the second stop valve need to be closed. For the convenience of operation, preferably, the first stop valve and the second stop valve are both electrically controlled valves.

[0025] In one embodiment of the present invention, the first end of the suction pipe is completely located in an extension space of the inner side wall of the first end of the refueling connector extending along the length direction of the refueling connector.

[0026] This arrangement can ensure that the first end of the suction tube can be inserted into the refueling port.

[0027] In one embodiment of the present invention, the first end of the suction pipe is L-shaped, and the first end of the suction pipe has a horizontal portion and a vertical portion that are perpendicular to each other.

[0028] In one embodiment of the present invention, the vertical portion is parallel to the axis of the refueling connector and the vertical portion is eccentrically disposed relative to the refueling connector.

[0029] In one embodiment of the present invention, it further comprises an oil cylinder assembly, an oil pipe and a cylindrical oil bag, wherein one end of the cylindrical oil bag is closed and the other end is open, the open end of the cylindrical oil bag is fixed to the end of the horizontal portion, the side wall of the cylindrical oil bag has a through hole, one end of the oil pipe is connected to the cylindrical oil bag, and the other end passes through the side wall of the refueling joint and is connected to the oil cylinder assembly through a second pipeline;

[0030] The cylindrical oil bladder has a folded state and an unfolded state. When the cylindrical oil bladder is in the folded state, the cylindrical oil bladder is completely located in an extension space of the inner side wall of the first end of the refueling connector extending along the length direction of the refueling connector; when the cylindrical oil bladder is in the unfolded state, the closed end of the cylindrical oil bladder passes through the extension space of the inner side wall of the first end of the refueling connector extending along the length direction of the refueling connector.

[0031] When the oil cylinder assembly is pumping oil, the cylindrical oil bag is in a folded state, which facilitates the characteristic oil bag to extend into the aircraft soft oil tank along with the first end of the suction pipe. When the oil cylinder assembly is filling oil, the cylindrical oil bag is in an expanded state, increasing the range of air suction.

[0032] In one embodiment of the present invention, the through hole is located in the upper region of the cylindrical oil bag.

[0033] This arrangement can conveniently suck out the air above the aircraft's soft fuel tank.

[0034] The beneficial effect of the present invention is that the refueling device of the present application can ensure that air is discharged from the aircraft soft fuel tank during refueling, so that the aircraft soft fuel tank does not need to be provided with an exhaust pipe and an exhaust valve, which can reduce space occupancy and reduce the weight of the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the aircraft soft fuel tank;

[0036] Figure 2 It is a schematic diagram of the refueling device;

[0037] Figure 3 It is a schematic diagram of the coordination of the aircraft soft fuel tank and the refueling device;

[0038] Figure 4 is a partial schematic diagram of a folded cylindrical oil bag and a first end of a suction pipe located in a soft oil tank of an aircraft;

[0039] Figure 5 is a schematic diagram of a folded cylindrical oil bag and a first end of a suction tube located in an extension space;

[0040] Figure 6 is a partial schematic diagram of a cylindrical oil bag in an expanded state and a first end of a suction pipe located in a soft oil tank of an aircraft;

[0041] Figure 7 It is a schematic diagram of the expanded cylindrical oil bladder passing through the extended space.

[0042] The reference numerals in the figures are:

[0043] 1. Aircraft soft oil tank; 11. Refueling interface; 2. Base; 3. Oil storage barrel; 31. Oil inlet pipe; 32. First stop valve; 33. Liquid level indication structure; 4. Air compressor; 41. Air outlet pipe; 5. Refueling connector; 5a. First end of refueling connector; 5b. Second end of refueling connector; 51. Extension space; 61. Refueling pipe; 62. Back suction pipe; 63. Suction pump; 7. Recovery tank; 71. First pipeline; 72. Delivery pump; 73. Second stop valve; 8. Suction pipe; 8a. First end of suction pipe; 8b. Second end of suction pipe; 81. Horizontal part; 811. Cylindrical oil bag; 8111. Through hole; 82. Vertical part; 91. Oil pipe; 92. Cylinder assembly; 93. Second pipeline. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does 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 cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] The present invention is described in detail below in conjunction with the accompanying drawings.

[0048] like Figure 1 to Figure 7 As shown, a refueling device for an aircraft soft fuel tank, the upper part of the aircraft soft fuel tank 1 only has a refueling interface 11, and the refueling device includes:

[0049] Base 2;

[0050] The oil storage barrel 3 is installed on the base 2. The oil storage barrel 3 has an oil inlet pipe 31. The oil inlet pipe 31 is installed with a first stop valve 32;

[0051] The air compressor 4 is installed on the base 2, and the air outlet pipe 41 of the air compressor 4 is connected to the upper end of the oil storage barrel 3.

[0052] A refueling connector 5, wherein a first end 5a of the refueling connector is connected to a refueling port 11, and a second end 5b of the refueling connector is connected to a lower end of the oil storage barrel 3 via a refueling pipe 61;

[0053] A recovery tank 7 is mounted on the base 2;

[0054] A suction pipe 8, wherein a first end 8a of the suction pipe is located outside the first end 5a of the refueling connector, and a second end 8b of the suction pipe extends into the refueling connector 5 and then passes through a side wall of the refueling connector 5;

[0055] A return suction pipe 62, one end of which is connected to the second end 8b of the suction pipe, and the other end of which is connected to the recovery tank 7;

[0056] The suction pump 63 is installed on the return suction pipe 62 .

[0057] A working principle of the refueling device of the present application is as follows: the refueling connector 5 is installed on the refueling interface 11 of the aircraft soft fuel tank 1. At this time, the first end 8a of the suction pipe is located in the uppermost space of the aircraft soft fuel tank 1 through the refueling interface 11. Then the air compressor 4 works, and the high-pressure gas enters the top of the oil storage barrel 3, and the fuel in the oil storage barrel 3 is pressed into the oil inlet pipe 31, and finally injected into the aircraft soft fuel tank 1 through the refueling connector 5. The oil injection through the air compressor 4 can reduce the amount of air entering the aircraft soft fuel tank 1 compared with the gear pump. Finally, the suction pump 63 works, and a small amount of air mixed with part of the fuel in the upper part of the aircraft soft fuel tank 1 is sucked into the recovery tank 7 through the suction pipe 8.

[0058] The refueling device of the present application can ensure that air is discharged from the aircraft soft fuel tank 1 during refueling, so that the aircraft soft fuel tank 1 does not need to be provided with an exhaust pipe and an exhaust valve, which can reduce space occupation and reduce the weight of the aircraft.

[0059] In actual use, the fuel pump can be connected to the oil inlet pipe 31 of the oil storage barrel 3 through a pipeline to transport the fuel with air into the oil storage barrel 3.

[0060] In actual use, a sealing cover is detachably mounted on the fuel filling port of the aircraft soft fuel tank of the present application.

[0061] like Figure 2 As shown, a liquid level indicating structure 33 is installed on the oil storage barrel 3. The fuel in the oil storage barrel 3 can be checked through the liquid level indicating structure 33, which facilitates and reliably performs the refueling operation.

[0062] like Figure 2 As shown, in this embodiment, the liquid level indicating structure 33 is a transparent area arranged up and down on the oil storage barrel 3. This arrangement allows the fuel amount in the oil storage barrel 3 to be viewed very intuitively.

[0063] In other embodiments, the liquid level indicating structure 33 may further include a liquid level sensor and a display screen for displaying the liquid level sensor numbers.

[0064] like Figure 2 As shown, in this embodiment, it also includes a delivery pump 72, a first pipeline 71 and a second stop valve 73. One end of the first pipeline 71 is connected to the lower end of the recovery tank 7, and the other end is connected to the upper end of the oil storage barrel 3. The delivery pump 72 and the second stop valve 73 are installed on the first pipeline 71. The fuel in the recovery tank 7 can be delivered to the oil storage barrel 3 through the first pipeline 71 and the delivery pump 72. In actual use, when the air compressor 4 is working, it is necessary to close the first stop valve 32 and the second stop valve 73. For the convenience of operation, preferably, the first stop valve 32 and the second stop valve 73 are both electrically controlled valves.

[0065] like Figure 4 and Figure 5As shown, in this embodiment, the first end 8a of the suction pipe is completely located in the extension space 51 of the inner side wall of the first end 5a of the refueling connector extending along the length direction of the refueling connector 5. This arrangement can ensure that the first end 8a of the suction pipe can be inserted into the refueling interface 11.

[0066] like Figure 4 to Figure 7 As shown, in this embodiment, the first end 8a of the suction pipe is L-shaped, and the first end 8a of the suction pipe has a horizontal portion 81 and a vertical portion 82 that are perpendicular to each other.

[0067] like Figure 5 and Figure 7 As shown, in this embodiment, the vertical portion 82 is parallel to the axis of the refueling connector 5 and the vertical portion 82 is eccentrically disposed relative to the refueling connector 5 .

[0068] like Figure 2 , Figure 4 and Figure 6 As shown, in this embodiment, it also includes a cylinder assembly 92, an oil pipe 91 and a cylindrical oil bag 811. One end of the cylindrical oil bag 811 is closed and the other end is open. The open end of the cylindrical oil bag 811 is fixed to the end of the horizontal portion 81. The side wall of the cylindrical oil bag 811 has a through hole 8111. One end of the oil pipe 91 is connected to the cylindrical oil bag 811, and the other end passes through the side wall of the refueling joint 5 and is connected to the cylinder assembly 92 through the second pipeline 93.

[0069] The cylindrical oil bag 811 has a folded state and an unfolded state. When the cylindrical oil bag 811 is in the folded state, the cylindrical oil bag 811 is completely located in the extension space 51 extending along the length direction of the refueling connector 5 from the inner side wall of the first end 5a of the refueling connector; when the cylindrical oil bag 811 is in the unfolded state, the closed end of the cylindrical oil bag 811 passes through the extension space 51 extending along the length direction of the refueling connector 5 from the inner side wall of the first end 5a of the refueling connector.

[0070] When the cylinder assembly 92 is pumping oil, the cylindrical oil bag 811 is in a folded state, which facilitates the characteristic oil bag to extend into the aircraft soft oil tank along with the first end 8a of the suction pipe. When the cylinder assembly 92 is filling oil, the cylindrical oil bag 811 is in an expanded state, increasing the range of air suction.

[0071] like Figure 6 and 7 As shown, in this embodiment, the through hole 8111 is located in the upper area of ​​the cylindrical oil bag 811. This arrangement can conveniently suck out the air above the aircraft soft oil tank.

[0072] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention and the drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the present invention.

Claims

1. A refueling device for an aircraft soft fuel tank, characterized in that: The upper part of the aircraft soft fuel tank only has a refueling interface, and the refueling device includes: Base; An oil storage barrel is installed on the base, and the oil storage barrel has an oil inlet pipe, and a first stop valve is installed on the oil inlet pipe; The air compressor is installed on the base, and the air outlet pipe of the air compressor is connected to the upper end of the oil storage barrel. A refueling connector, the first end of which is used to be connected to the refueling interface, and the second end of which is connected to the lower end of the oil storage barrel through a refueling pipe; a recovery tank, mounted on a base; A suction pipe, wherein the first end of the suction pipe is located outside the first end of the refueling connector, and the second end of the suction pipe extends into the refueling connector and then passes through the side wall of the refueling connector; A suction return pipe, one end of which is connected to the second end of the suction pipe and the other end of which is connected to the recovery tank; A suction pump is installed on the return suction pipe.

2. The refueling device for an aircraft soft fuel tank according to claim 1, characterized in that: A liquid level indicating structure is installed on the oil storage barrel.

3. The refueling device for an aircraft soft fuel tank as claimed in claim 2, characterized in that: The liquid level indicating structure is a transparent area arranged up and down on the oil storage barrel.

4. The refueling device for an aircraft soft fuel tank as claimed in claim 2, characterized in that: The liquid level indicating structure comprises a liquid level sensor and a display screen for displaying the numbers of the liquid level sensor.

5. The refueling device for an aircraft soft fuel tank according to claim 1, characterized in that: It also includes a delivery pump, a first pipeline and a second stop valve, one end of the first pipeline is connected to the lower end of the recovery tank, and the other end is connected to the upper end of the oil storage barrel, and the delivery pump and the second stop valve are installed on the first pipeline.

6. The refueling device for an aircraft soft fuel tank as claimed in claim 1, characterized in that: The first end of the suction pipe is completely located in an extension space of the inner side wall of the first end of the refueling connector extending along the length direction of the refueling connector.

7. The refueling device for an aircraft soft fuel tank as claimed in claim 6, characterized in that: The first end of the suction pipe is L-shaped and has a horizontal portion and a vertical portion that are perpendicular to each other.

8. The refueling device for an aircraft soft fuel tank as claimed in claim 7, characterized in that: The vertical portion is parallel to the axis of the refueling connector and is eccentrically arranged relative to the refueling connector.

9. The aircraft soft fuel tank refueling device according to claim 8, characterized in that: It also includes an oil cylinder assembly, an oil pipe and a cylindrical oil bag, wherein one end of the cylindrical oil bag is closed and the other end is open, the open end of the cylindrical oil bag is fixed to the end of the horizontal portion, the side wall of the cylindrical oil bag has a through hole, one end of the oil pipe is connected to the cylindrical oil bag, and the other end passes through the side wall of the refueling joint and is connected to the oil cylinder assembly through a second pipeline; The cylindrical oil bladder has a folded state and an unfolded state. When the cylindrical oil bladder is in the folded state, the cylindrical oil bladder is completely located in an extension space of the inner side wall of the first end of the refueling connector extending along the length direction of the refueling connector; when the cylindrical oil bladder is in the unfolded state, the closed end of the cylindrical oil bladder passes through the extension space of the inner side wall of the first end of the refueling connector extending along the length direction of the refueling connector.

10. The aircraft soft fuel tank refueling device according to claim 9, characterized in that: The through hole is located in the upper region of the cylindrical oil bag.

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