An aircraft fuel truck system

Abstract

The present application relates to the technical field of aircraft fuel truck, more particularly, to an aircraft fuel truck system, the oil filling bottom valve and the oil filling bottom valve are communicated and arranged on the oil tank; the pump station inlet is communicated with the oil inlet of the oil pump, the pump station outlet is communicated with the oil outlet of the oil pump; the PCV valve is communicated with the oil outlet of the oil pump; the pressure oil filling nozzle is communicated with the oil outlet of the oil pump through the first oil filling valve; the gravity oil filling gun is communicated with the oil outlet of the oil pump through the second oil filling valve; the reel oil return valve is communicated and arranged between the second oil filling valve and the oil filling bottom valve. The aircraft fuel truck system in the present application can meet the needs of pressure oil filling and gravity oil filling, and has the function of mobile pump station, which can realize the effect of transmitting external oil without oil filling and oil pumping, and prevent the introduction of external pollution to the oil filling and oil filling pipeline when the mobile pump station function is executed.

Description

Technical Field

[0001] This invention relates to the technical field of aircraft fuel tankers, and more specifically, to an aircraft fuel tanker system. Background Technology

[0002] Aircraft refueling trucks are specialized tank vehicles that integrate the functions of receiving, storing, transporting, and refueling aviation fuel. They are primarily used for refueling general aviation aircraft and for the transfer and transportation of aviation fuel. Due to the specific use cases and the unique nature of providing aviation fuel support, aircraft refueling trucks are required to possess high levels of inherent safety, process control, fuel quality control, fuel metering for receiving and dispatching, and multi-functional applicability.

[0003] Currently, domestic general aviation airports and companies use common refueling trucks for aircraft refueling. While these trucks meet the technical standards for hazardous chemical road transport vehicles and have refueling and receiving functions, there are no unified technical standards for their fuel storage and refueling systems, or for the overall vehicle production. The relevant process pipelines and essential system components for aircraft refueling trucks are not designed specifically for the unique and specialized needs of aircraft refueling. This fails to meet the safety, applicability, and flexibility requirements of aircraft refueling. Therefore, it is necessary to design a specific process pipeline and system component setup principle for aircraft refueling trucks to meet the daily operational needs of aircraft refueling.

[0004] An aircraft refueling truck is provided, comprising a tractor, a semi-trailer, a fuel tank, a control cabin, and a centrifugal pump. Its features include: a variable cross-section wedge-shaped fuel tank made of aluminum-magnesium alloy; a level gauge installed on the fuel tank; baffles, spoilers, and guide vanes fixedly connected to the inner wall of the fuel tank; a support base fixed to the outer wall of the fuel tank; an fuel outlet at the front end of the fuel tank with a pneumatically controlled bottom valve installed thereon; a fuel inlet at the rear end of the fuel tank; and a drain outlet at the bottom of the fuel tank. A pumping pipeline is connected to the fuel outlet, and a rotary joint and a flexible rubber joint are connected to the pumping pipeline. The centrifugal pump is connected to the pumping pipeline. A turntable saddle is installed on the tractor, and the semi-trailer is connected to the tractor via the turntable saddle.

[0005] The existing aircraft refueling trucks still have the problem of limited functionality and are not suitable for the economic and flexible needs of general aviation aircraft refueling operations. Summary of the Invention

[0006] To overcome the problem that existing aircraft refueling trucks have limited functionality and are not suitable for the economic and flexible needs of general aviation aircraft refueling operations, this invention provides an aircraft refueling truck system.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an aircraft fuel tanker system, comprising a fuel tank, a fuel pump, a pump station inlet, a pump station outlet, a pump station outlet valve, a pump station inlet valve, a PCV valve, a reel return valve, a bottom filling valve, a bottom refueling valve, a pressure refueling nozzle, a gravity refueling nozzle, a first refueling valve, and a second refueling valve; the bottom filling valve and the bottom refueling valve are both connected to the fuel tank; the pump station inlet is connected to the fuel pump inlet, the pump station outlet is connected to the fuel pump outlet, the pump station outlet valve is connected to the pump station outlet, and the pump station inlet valve is connected to the pump station inlet; the PCV valve is connected to the fuel pump outlet; the pressure refueling nozzle is connected to the fuel pump outlet through the first refueling valve; the gravity refueling nozzle is connected to the fuel pump outlet through the second refueling valve; and the reel return valve is connected between the second refueling valve and the bottom filling valve.

[0008] When it is necessary to fill the oil tank, close the first filling valve, the second filling valve, the pump station outlet valve, and the bottom filling valve; open the reel return valve, the bottom filling valve, the PCV valve, the bottom filling valve, and the pump station inlet valve; start the oil pump to draw external oil into the system through the pump station inlet; under the pumping action of the oil pump, the oil enters the oil tank through the PCV valve, the reel return valve, and the bottom filling valve, thus realizing the filling of the oil tank. When refueling the aircraft, close the sump valve, pump station inlet valve, pump station outlet valve, and reel return valve; open the sump valve, PCV valve, and either the first or second refueling valve. Start the fuel pump, which draws fuel from the tank through the sump valve. The fuel flows through the PCV valve, then through the first or second refueling valve, and finally out through a pressure refueling nozzle or gravity refueling nozzle. When using a pressure refueling nozzle, open the first refueling valve and close the second refueling valve; when using a gravity refueling nozzle, open the second refueling valve and close the first refueling valve. When using the aircraft fuel truck system for external fuel transfer, only open the pump station outlet valve and pump station inlet valve, closing all other valves, and start the fuel pump. External fuel flows in from the pump station inlet and is pumped out through the pump station outlet, achieving the effect of a mobile pump station. Simultaneously, external fuel will not flow through other pipelines in the aircraft fuel truck system, preventing contamination of the entire system.

[0009] Furthermore, it also includes a filter separator, the oil inlet of which is connected to the PCV valve, and the oil outlet of which is connected to the first oil filling valve, the second oil filling valve, the reel return valve, and the bottom oil filling valve.

[0010] Furthermore, it also includes a first pressure relief valve and a manual pressure relief valve. The first pressure relief valve is connected between the filter separator and the PCV valve, and its outlet is connected to the oil tank. The manual pressure relief valve is connected in parallel with the first pressure relief valve, and its outlet is connected to the oil tank.

[0011] Furthermore, it also includes a first check valve and a second check valve, wherein the first check valve is connected in parallel with the first refueling valve, and the second check valve is connected in parallel with the second refueling valve.

[0012] Furthermore, the top of the filter separator is connected to an automatic vent valve and a sight glass, and the outlet of the automatic vent valve is connected to the oil tank; the filter separator is also connected to a filter oil extraction valve, which is connected to the oil tank through an oil pump; the filter separator is also provided with a second pressure relief valve, which can be connected to the oil tank.

[0013] Furthermore, a sedimentation tank is connected to the bottom of the filter separator; the sedimentation tank, the oil inlet of the filter separator, the oil outlet of the filter separator, and the bottom of the oil tank are all connected to a discharge pipe that communicates with the outside world, and a maintenance ball valve and an automatic return valve are connected in sequence on the discharge pipe.

[0014] Furthermore, it also includes a visual sampler and an oil collection tank. The visual sampler is connected to the discharge pipe, and one end of the oil collection tank is connected to the visual sampler, while the other end is connected to the oil tank.

[0015] Furthermore, the oil tank is equipped with a level gauge for detecting the liquid level in the tank, and both the bottom oil filling valve and the bottom filling valve are solenoid valves, and both are electrically connected to the level gauge.

[0016] Furthermore, it also includes a first oil extraction valve and a second oil extraction valve, wherein the first oil extraction valve is connected between the pressure filling nozzle and the oil pump, and the second oil extraction valve is connected between the gravity filling nozzle and the oil pump.

[0017] Furthermore, a Deidmann controller is connected to the PCV valve.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The aircraft fuel tanker system of the present invention can meet the needs of pressure refueling and gravity refueling, and also has the function of a mobile pump station. It can achieve the effect of transferring external fuel without loading or pumping fuel, and prevent the introduction of external pollution into the refueling and loading pipelines when performing the mobile pump station function.

[0020] 2. By setting a manual pressure relief valve, the operator can release pressure through the manual pressure relief valve when the first pressure relief valve fails, ensuring that the abnormal pipeline pressure at the filter separator can be released in a timely manner;

[0021] 3. By setting a first check valve in parallel with the first refueling valve and a second check valve in parallel with the second refueling valve, after refueling is completed and the first and second refueling valves are closed, the pipeline between the pressure refueling nozzle and the first refueling valve will be automatically depressurized through the first check valve, and the pipeline between the gravity refueling gun and the second refueling valve will be automatically depressurized through the second check valve.

[0022] 4. By installing an automatic air vent valve, air can be expelled from the filter separator when oil is introduced into the empty chamber. This can be observed through a sight glass to confirm the air has been purged. A filter oil extraction valve allows for easy inspection and maintenance of the filter separator by opening the valve and starting the oil pump to draw residual oil into the oil tank. A second pressure relief valve prevents excessive pressure within the filter separator, opening when the pressure exceeds its rated pressure, allowing the oil to flow directly into the oil tank for pressure relief.

[0023] 5. The sedimentation tank collects water and impurities from the filter separator, which are then discharged to the outside through the discharge pipe. Water and impurities deposited at the inlet and outlet of the filter separator and at the bottom of the oil tank can also be discharged through the discharge pipe. The maintenance ball valve is normally open. When water and impurities need to be discharged, the automatic return valve can be opened to allow water and impurities to flow out through the discharge pipe. After discharge, the automatic return valve can be released and automatically returned to its closed position. When the discharge pipe or automatic return valve needs maintenance, the maintenance ball valve can be closed for easy maintenance.

[0024] 6. Connect the pressure filler nozzle to the bottom filling valve, start the oil pump, open the first filler valve, the bottom filler valve, and the bottom filling valve, and close the reel return valve and the second filler valve. This allows the oil in the tank to be pumped out by the oil pump and returned to the tank through the filter separator, the pressure filler nozzle, and the bottom filling valve, thus achieving the self-circulation cleaning function of the entire oil circuit. Attached Figure Description

[0025] Figure 1 This is an overall oil pipeline diagram of an embodiment of an aircraft fuel tanker system of the present invention;

[0026] Figure 2 yes Figure 1 Enlarged view of section A;

[0027] Figure 3 yes Figure 1 Enlarged view of section B;

[0028] Figure 4 yes Figure 1 Enlarged view of section C.

[0029] In the attached diagram: 1. Oil tank; 2. Oil pump; 3. Pump station inlet; 4. Pump station outlet; 5. Pump station inlet valve; 6. Pump station outlet valve; 7. PCV valve; 8. Reel return valve; 9. Bottom filling valve; 10. Bottom filling valve; 11. Pressure filling nozzle; 12. Gravity filling gun; 13. First filling valve; 14. Second filling valve; 15. Venturi tube; 16. Filter separator; 17. First pressure relief valve; 18. Manual pressure relief valve; 19. First check valve; 20. Second check valve; 21. Automatic vent valve; 22. Sight glass; 23. Filter oil extraction valve; 24. Second pressure relief valve; 25. Sedimentation tank; 26. Discharge pipe; 27. Maintenance ball valve; 28. Automatic return valve; 29. ​​Level gauge; 30. First oil extraction valve; 31. Second oil extraction valve; 32. Visual sampler; 33. Oil collection tank; 34. Differential pressure gauge. Detailed Implementation

[0030] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0031] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0033] Example 1

[0034] Reference Figures 1 to 4This is Embodiment 1 of an aircraft fuel tanker system of the present invention, comprising a fuel tank 1, a fuel pump 2, a pump station inlet 3, a pump station outlet 4, a pump station outlet valve 6, a pump station inlet valve 5, a PCV valve 7, a reel return valve 8, a bottom filling valve 9, a bottom filling valve 10, a pressure refueling nozzle 11, a gravity refueling nozzle 12, a first refueling valve 13, and a second refueling valve 14; the bottom filling valve 9 and the bottom filling valve 10 are both connected to the fuel tank 1; the pump station inlet 3 is connected to the fuel pump 2's inlet... The station outlet 4 is connected to the oil outlet of the oil pump 2. The pump station outlet valve 6 is connected to the pump station outlet 4, and the pump station inlet valve 5 is connected to the pump station inlet 3. The PCV valve 7 is connected to the oil outlet of the oil pump 2. The pressure filler nozzle 11 is connected to the oil outlet of the oil pump 2 through the first filler valve 13. The gravity filler gun 12 is connected to the oil outlet of the oil pump 2 through the second filler valve 14. The reel return valve 8 is connected between the second filler valve 14 and the bottom filler valve 9.

[0035] When it is necessary to fill oil into oil tank 1, close the first filling valve 13, the second filling valve 14, the pump station outlet valve 6, and the bottom filling valve 10; open the reel return valve 8, the bottom filling valve 9, the PCV valve 7, the bottom filling valve 9, and the pump station inlet valve 5; start the oil pump 2 to draw external oil into the system through the pump station inlet 3. Under the pumping action of the oil pump 2, the oil enters oil tank 1 through the PCV valve 7, the reel return valve 8, and the bottom filling valve 9, thus realizing the filling of oil tank 1. When refueling the aircraft is required, close the bottom refueling valve 9, pump station inlet valve 5, pump station outlet valve 6, and reel return valve 8; open the bottom refueling valve 10, PCV valve 7, and either the first refueling valve 13 or the second refueling valve 14. Start the oil pump 2, which draws the oil from the tank 1 through the bottom refueling valve 10. The oil flows through the PCV valve 7 under the pumping action of the oil pump 2, then through the first refueling valve 13 or the second refueling valve 14, and finally flows out through the pressure refueling nozzle 11 or the gravity refueling nozzle 12. When refueling is required using the pressure refueling nozzle 11, the first refueling valve 13 can be opened and the second refueling valve 14 can be closed. When refueling is required using the gravity refueling nozzle 12, the second refueling valve 14 can be opened and the first refueling valve 13 can be closed. When external fuel transfer is required using the aircraft fuel tanker system, only the pump station outlet valve 6 and pump station inlet valve 5 are opened, while all other valves are closed. The fuel pump 2 is then started, allowing external fuel to flow in from the pump station inlet 3 and be pumped out by the fuel pump 2 through the pump station outlet 4. This achieves the effect of a mobile pump station, while preventing external fuel from flowing through other pipelines in the aircraft fuel tanker system, thus avoiding contamination of the entire system. A Venturi tube 15 with a pressure gauge is connected between the first refueling valve 13 and the pressure nozzle. The Venturi tube 15 can adaptively adjust the refueling pressure during refueling through the pressure nozzle, preventing damage from overpressure and water hammer.

[0036] In this embodiment, a filter separator 16 is also included. The oil inlet of the filter separator 16 is connected to the PCV valve 7, and the oil outlet of the filter separator 16 is connected to the first oil filling valve 13, the second oil filling valve 14, the reel return valve 8, and the bottom oil filling valve 9.

[0037] The filter separator 16 filters the oil flowing through it, preventing impurities and contaminants from the external oil from entering the oil tank 1, or preventing impurities and contaminants in the oil tank 1 from being injected into the aircraft fuel tank. The pressure filler nozzle 11 is connected to the filler valve 9, and the oil pump 2 is started. The first filler valve 13, the filler valve 10, and the filler valve 9 are opened, while the reel return valve 8 and the second filler valve 14 are closed. This allows the oil in the oil tank 1 to be pumped out by the oil pump 2 and returned to the oil tank 1 through the filter separator 16, the pressure filler nozzle, and the filler valve 9, achieving a self-circulating cleaning function for the entire oil circuit.

[0038] In this embodiment, a first pressure relief valve 17 and a manual pressure relief valve 18 are also included. The first pressure relief valve 17 is connected between the filter separator 16 and the PCV valve 7, and the outlet of the first pressure relief valve 17 is connected to the oil tank 1. The manual pressure relief valve 18 is connected in parallel with the first pressure relief valve 17, and the outlet of the manual pressure relief valve 18 is connected to the oil tank 1.

[0039] The first pressure relief valve 17 is an automatic pressure relief valve. When the pipeline pressure exceeds 0.1 MPa, the automatic pressure relief valve will open to introduce oil into the oil tank 1 for pressure relief, preventing pipeline pressure from rising. By setting a manual pressure relief valve 18, the operator can release pressure manually through the first pressure relief valve 17 if it fails, ensuring that abnormal pipeline pressure at the filter separator 16 can be released in a timely manner.

[0040] In this embodiment, a first one-way valve 19 and a second one-way valve 20 are also included. The first one-way valve 19 is connected in parallel with the first refueling valve 13, and the second one-way valve 20 is connected in parallel with the second refueling valve 14.

[0041] By setting a first check valve 19 connected in parallel with the first refueling valve 13 and a second check valve 20 connected in parallel with the second refueling valve 14, after refueling is completed and the first refueling valve 13 and the second refueling valve 14 are closed, the pipeline between the pressure refueling nozzle 11 and the first refueling valve 13 is automatically depressurized through the first check valve 19, and the pipeline between the gravity refueling gun 12 and the second refueling valve 14 is automatically depressurized through the second check valve 20.

[0042] In this embodiment, the top of the filter separator 16 is connected to an automatic vent valve 21 and a sight glass 22, and the outlet of the automatic vent valve 21 is connected to the oil tank 1; the filter separator 16 is also connected to a filter oil extraction valve 23, which is connected to the oil tank 1 through an oil pump 2; the filter separator 16 is also provided with a second pressure relief valve 24, which is connected to the oil tank 1 through the second pressure relief valve 24.

[0043] By setting an automatic vent valve 21, air can be expelled from the filter separator 16 when oil is introduced into the empty chamber. The presence of air in the filter separator 16 can be observed through the sight glass 22. By setting a filter oil extraction valve 23, when it is necessary to inspect and maintain the filter separator 16, the filter oil extraction valve 23 can be opened and the oil pump 2 can be started to pump the residual oil in the filter separator 16 into the oil tank 1. By setting a second pressure relief valve 24, the danger of excessive pressure in the filter separator 16 can be avoided. When the pressure in the filter separator 16 exceeds the rated pressure of the second pressure relief valve 24, the second pressure relief valve 24 will open, allowing the oil in the filter separator 16 to flow directly into the oil tank 1 for pressure relief.

[0044] In this embodiment, a sedimentation tank 25 is connected to the bottom of the filter separator 16; the sedimentation tank 25, the oil inlet of the filter separator 16, the oil outlet of the filter separator 16 and the bottom of the oil tank 1 are all connected to a discharge pipe 26 that communicates with the outside world, and a maintenance ball valve 27 and an automatic return valve 28 are connected in sequence on the discharge pipe 26.

[0045] The sedimentation tank 25 collects water and impurities from the filter separator 16, and then discharges the water and impurities from the sedimentation tank 25 to the outside through the discharge pipe 26. Water and impurities deposited at the inlet and outlet of the filter separator 16 and at the bottom of the oil tank 1 can also be discharged through the discharge pipe 26. The maintenance ball valve 27 is normally open. When water and impurities need to be discharged, the automatic return valve 28 can be opened to allow water and impurities to flow out through the discharge pipe 26. After discharge, the automatic return valve 28 can be released and automatically returned to its closed position. When the discharge pipe 26 or the automatic return valve 28 needs to be inspected, the maintenance ball valve 27 can be closed for easy maintenance.

[0046] In this embodiment, the oil tank 1 is equipped with a level gauge 29 for detecting the liquid level in the oil tank 1. The oil filling valve 9 and the oil filling valve 10 are both solenoid valves, and the oil filling valve 9 and the oil filling valve 10 are electrically connected to the level gauge 29.

[0047] When the liquid level in oil tank 1 rises to 95% of the tank's capacity, the level gauge 29 will control the bottom filling valve 9 to close, thereby preventing oil from continuing to flow into oil tank 1; when the oil level in oil tank 1 drops to a position 1010cm away from the bottom filling valve, the level gauge 29 will control the bottom filling valve to close, preventing further refueling.

[0048] In this embodiment, a first oil extraction valve 30 and a second oil extraction valve 31 are also included. The first oil extraction valve 30 is connected between the pressure oil nozzle 11 and the oil pump 2, and the second oil extraction valve 31 is connected between the gravity oil nozzle 12 and the oil pump 2.

[0049] Specifically, when oil extraction is required, the first filling valve 13 and the second filling valve 14 can be closed, and the first extraction valve 30 or the second extraction valve 31 can be opened as needed. Oil can then be extracted from the outside into the oil tank 1 through the pressure nozzle or gravity filling gun 12.

[0050] In this embodiment, a Deadman controller is connected to the PCV valve 7. The operator can remotely control the PCV valve 7 using the Deadman controller.

[0051] Example 2

[0052] Reference Figure 2 This is a second embodiment of an aircraft fuel tanker system of the present invention. The difference between this embodiment and the first embodiment is that this embodiment also includes a visual sampler 32 and an oil collection tank 33. The visual sampler 32 is connected to the discharge pipe 26, and one end of the oil collection tank 33 is connected to the visual sampler 32, and the other end is connected to the oil tank 1.

[0053] Specifically, a discharge pipe 26 is also connected to the bottom of the oil collection tank 33. A maintenance ball valve 27 and an automatic return valve 28 are connected to the discharge pipe 26 in sequence. The visual sampler 32 is used to intercept the oil coming from the discharge pipe 26 and perform a visual inspection. After the inspection, the oil is discharged into the oil collection tank 33 for storage. When the oil collection tank 33 is full, impurities are discharged through the discharge pipe 26 connected to its bottom. After the discharge inspection is qualified, the oil is pumped back into the oil tank 1 through the oil pump 2.

[0054] Example 3

[0055] Reference Figure 2 This is Embodiment 3 of an aircraft fuel tanker system of the present invention. The difference between this embodiment and Embodiment 2 is that this embodiment also includes a differential pressure gauge 34. The low-pressure end of the differential pressure gauge 34 is connected to the oil inlet of the filter separator 16, and the high-pressure end of the differential pressure gauge 34 is connected to the oil outlet of the filter separator 16.

[0056] Specifically, the differential pressure gauge 34 is used to measure the pressure at the inlet and outlet of the filter separator 16. Ball valves are connected to both the inlet and outlet of the differential pressure gauge 34. When the differential pressure gauge 34 needs maintenance, the two ball valves can be closed and the differential pressure gauge 34 can be removed to prevent the oil in the oil circuit from flowing out.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An aircraft fuel tanker system, characterized in that, The system includes an oil tank (1), an oil pump (2), a pump station inlet (3), a pump station outlet (4), a pump station outlet valve (6), a pump station inlet valve (5), a PCV valve (7), a reel return valve (8), an oil filling valve (9), a filling valve (10), a pressure filling nozzle (11), a gravity filling nozzle (12), a first filling valve (13), and a second filling valve (14). The oil filling valve (9) and the filling valve (10) are both connected to the oil tank (1). The pump station inlet (3) is connected to the oil inlet of the oil pump (2), and the pump station outlet (4) is connected to the oil outlet of the oil pump (2). The pump station outlet valve (6) is connected to the pump station outlet (4), and the pump station inlet valve (5) is connected to the pump station inlet (3); the PCV valve (7) is connected to the oil outlet of the oil pump (2); the pressure filler nozzle (11) is connected to the oil outlet of the oil pump (2) through the first filler valve (13); the gravity filler gun (12) is connected to the oil outlet of the oil pump (2) through the second filler valve (14); the reel return valve (8) is connected between the second filler valve (14) and the bottom filler valve (9); and a filter separator (16) is also included. The inlet of the filter separator (16) is connected to the PCV valve (7), and the outlet of the filter separator (16) is connected to the first filling valve (13), the second filling valve (14), the reel return valve (8), and the bottom filling valve (9); it also includes a first pressure relief valve (17) and a manual pressure relief valve (18). The first pressure relief valve (17) is connected between the filter separator (16) and the PCV valve (7), and the outlet of the first pressure relief valve (17) is connected to the oil tank (1); the manual pressure relief valve (18) is connected in parallel with the first pressure relief valve (17), and the manual pressure relief valve (18) is connected in parallel with the first pressure relief valve (17). The outlet of the pressure relief valve (18) is connected to the oil tank (1); the top of the filter separator (16) is connected to an automatic vent valve (21) and a sight glass (22), and the outlet of the automatic vent valve (21) is connected to the oil tank (1); the filter separator (16) is also connected to a filter oil extraction valve (23), and the filter oil extraction valve (23) is connected to the oil tank (1) through an oil pump (2); the filter separator (16) is also provided with a second pressure relief valve (24), and the filter separator (16) can be connected to the oil tank (1) through the second pressure relief valve (24); The pressure filler nozzle (11) is connected to the oil filling valve (9), and the oil pump (2) is started. The first filler valve (13), the filler valve (10), and the oil filling valve (9) are opened, and the reel return valve (8) and the second filler valve (14) are closed. This allows the oil in the oil tank (1) to be pumped out by the oil pump (2) and returned to the oil tank (1) through the filter separator (16), the pressure filler nozzle (11), and the oil filling valve (9), thus realizing the self-circulation cleaning function of the entire oil circuit.

2. The aircraft fuel tanker system according to claim 1, characterized in that, It also includes a first check valve (19) and a second check valve (20), wherein the first check valve (19) is connected in parallel with the first refueling valve (13), and the second check valve (20) is connected in parallel with the second refueling valve (14).

3. The aircraft fuel tanker system according to claim 1, characterized in that, The bottom of the filter separator (16) is connected to a sedimentation tank (25); the sedimentation tank (25), the oil inlet of the filter separator (16), the oil outlet of the filter separator (16) and the bottom of the oil tank (1) are all connected to a discharge pipe (26) that is connected to the outside. A maintenance ball valve (27) and an automatic return valve (28) are connected in sequence on the discharge pipe (26).

4. The aircraft fuel tanker system according to claim 3, characterized in that, It also includes a visual sampler (32) and an oil collection tank (33). The visual sampler (32) is connected to the discharge pipe (26). One end of the oil collection tank (33) is connected to the visual sampler (32), and the other end is connected to the oil tank (1).

5. The aircraft fuel tanker system according to claim 1, characterized in that, The oil tank (1) is equipped with a level gauge (29) for detecting the liquid level in the oil tank (1). The bottom valve (9) and the bottom valve (10) are both solenoid valves, and the bottom valve (9) and the bottom valve (10) are electrically connected to the level gauge (29).

6. The aircraft fuel tanker system according to claim 1, characterized in that, It also includes a first oil extraction valve (30) and a second oil extraction valve (31). The first oil extraction valve (30) is connected between the pressure oil nozzle (11) and the oil pump (2), and the second oil extraction valve (31) is connected between the gravity oil nozzle (12) and the oil pump (2).

7. The aircraft fuel tanker system according to any one of claims 1-6, characterized in that, The PCV valve (7) is connected to a Deidmann controller.

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