An air-bleed pressurized vacuum oil tank automatic exhaust refueling device and a method of using the same

Abstract

The application discloses an air-boosted vacuum oil tank automatic exhaust and oiling device, which comprises an air-boosting pipe (2), a fuel oil filling device (3), a fuel oil filling pipe (4) and an oil pumping pipe (5). The fuel oil filling device (3) comprises a compressed air outlet (31), a fuel oil outlet (32), an oil inlet (33), a fuel oil path and a boosting air path. One end of the air-boosting pipe (2) is connected with each air bag (12), and the other end is connected with the compressed air outlet (31) of the fuel oil filling device (3). One end of the fuel oil filling pipe (4) is connected with an oil bag (11), and the other end is connected with the fuel oil outlet (32) of the fuel oil filling device (3). One end of the oil pumping pipe (5) is connected with the oil inlet (33) of the fuel oil filling device (3), and the other end is connected with a fuel oil barrel (6). The oiling process and the oil pumping process are fully automatically completed, the pipeline joint is automatically disconnected and sealed after the fuel oil filling is completed, and manual operation or manual exhaust is not needed.

Description

Technical Field

[0001] The present invention belongs to the technical field of unmanned aerial vehicle (UAV) ground support, and in particular relates to an automatic exhaust and refueling device for an air-bleed booster vacuum oil tank and a method for using the device. Background Art

[0002] With the rapid development of drone technology, drones are increasingly being used in both military and civilian applications. Beyond the drone's own performance, the usability and responsiveness of its ground support equipment are crucial factors in evaluating a drone's performance. Refueling and refueling are routine operations during every drone flight. Therefore, reducing the operational complexity of these processes and improving their efficiency is crucial for enhancing drone performance.

[0003] Currently, a growing number of small drones are using TPU materials for their soft fuel tanks, particularly vacuum-proof soft fuel tanks that are completely airtight. This type of tank offers low cost, maximizes fuel tank space, and poses no restrictions on flight maneuvers. However, the refueling process requires the complete removal of air, which presents significant challenges for operators. Prior to refueling, the tank may contain both fuel and air. Currently, common vacuum pumps are unable to evacuate the tank while both media are present. Furthermore, the presence of bubbles in the vacuum soft tank can cause engine instability or even stalling, seriously impacting flight safety.

[0004] In recent years, the coordination and autonomy of swarm drones have become a focus of research for many scholars. For scenarios where multiple drones in a swarm require refueling before takeoff, intelligent, automated refueling devices can significantly reduce the operational complexity, time, and labor costs of the refueling process. This is especially true in the confined, high-density launch boxes where automatic plugging and unplugging significantly simplifies operation. Furthermore, traditional fuel tanks using direct refueling are unable to meet the demands of high-speed flight maneuvers. For large-scale swarm drones using vacuum fuel tanks, manual refueling and degassing clearly cannot meet the requirements of these scenarios. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides an automatic exhaust and refueling device for an air-entrained, pressurized, vacuum tank with one-touch automatic exhaust and refueling and one-touch automatic oil pumping functions, and a method for using the device. The technical solutions adopted by the present invention are as follows:

[0006] An automatic exhaust and refueling device for an air-entrained, pressurized, vacuum oil tank, wherein the oil tank is a soft oil tank, including an oil bag and a plurality of air bags, each of which is connected to the oil bag but not in communication.

[0007] The device includes an air boost pipe, a fuel filling device, a fuel filling pipe, and an oil extraction pipe. The fuel filling device includes a compressed air outlet, a fuel outlet, an oil inlet, a fuel path, and a pressurized air path. One end of the air boost pipe is connected to each air bag, and the other end is connected to the compressed air outlet of the fuel filling device. One end of the fuel filling pipe is connected to the oil bag, and the other end is connected to the fuel outlet of the fuel filling device. One end of the oil extraction pipe is connected to the oil inlet of the fuel filling device, and the other end is connected to the fuel tank.

[0008] The fuel line is connected between the fuel outlet and the fuel inlet, and the pressurized air line is connected to the compressed air outlet.

[0009] Furthermore, the fuel circuit includes a Y-shaped tee and two branches. The fuel outlet is connected to the Y-shaped tee and then connected to the two branches respectively, one of which is connected to the solenoid valve II, and the other is connected to the refueling pump and the fuel flow meter. The two branches are then merged into the first T-shaped tee and connected to the fuel inlet.

[0010] Furthermore, the pressurized air circuit includes a second T-shaped three-way and two branches. The compressed air outlet is connected to the second T-shaped three-way and then connected to the two branches respectively, one of which is connected to the air booster pump and the other is connected to the solenoid valve I.

[0011] Furthermore, the fuel filling device also includes a refueling device control unit, a display screen, a fuel filling button, and a fuel suction button. The display screen has a touch function and can input the soft fuel tank capacity. The refueling device control unit is used to receive the soft fuel tank capacity, fuel filling button signal, fuel suction button signal, fuel flow meter data, and air booster pump outlet pressure data input by the display screen, and control the display of the refueling device status on the display screen, the start and stop of the refueling pump, the start and stop of the air booster pump, and the on and off of solenoid valve I and solenoid valve II.

[0012] Furthermore, the oil bag includes an oil bag interface, one end of the fuel filling pipe is connected to the oil bag interface, each of the air bags includes an air bag interface, and one end of the air boost pipe is connected to each air bag interface.

[0013] Furthermore, the oil bag interface and the air bag interface use self-sealing male joints, one end of the fuel filling pipe and one end of the air boost pipe use self-sealing female joints, the fuel outlet, the compressed air outlet and the oil inlet use self-sealing female joints, and the other end of the fuel filling pipe, the other end of the air boost pipe and one end of the oil extraction pipe use self-sealing male joints.

[0014] Furthermore, it also includes a steering gear, a steering gear rocker arm, a connecting rod, and a self-sealing joint snap ring. The self-sealing joint female head includes a steel ball arranged on the side, and the self-sealing joint snap ring is sleeved on the outside of the self-sealing joint female head. The two ends of the connecting rod are respectively connected to the self-sealing joint snap ring and one end of the steering gear rocker arm, and the other end of the steering gear rocker arm is connected to the steering gear. When the steering gear rocker arm is vertically downward, the self-sealing joint snap ring is in a locked state, pressing the steel ball on the side of the self-sealing joint female head to complete the locking between the self-sealing joint male head and the self-sealing joint female head. When the steering gear rocker arm rotates, the steering gear rocker arm pulls the connecting rod to drive the self-sealing joint snap ring to move away from the self-sealing joint male head, the self-sealing joint snap ring can move to a relaxed state, the steel ball on the side of the self-sealing joint female head is exposed, the self-sealing joint female head is loosened, and separation from the self-sealing joint male head is completed. After separation, the self-sealing joint male head and the self-sealing joint female head will be in a self-sealing state respectively.

[0015] A method for using the above-mentioned automatic exhaust and refueling device for a bleed air-pressurized vacuum fuel tank is provided. During the refueling operation, the soft fuel tank capacity is input on the display screen, and the fuel filling button is pressed. The solenoid valve I opens, the air bag is vented to the atmosphere, the solenoid valve II closes, the refueling pump starts, and fuel is extracted from the fuel barrel, flows through the oil extraction pipe, the refueling pump, the fuel flow meter, the fuel filling pipe, and enters the oil bag, filling the soft fuel tank with a predetermined proportion of fuel; the refueling pump stops working, the solenoid valve II opens, the solenoid valve I closes, the air booster pump starts working, and compressed air is injected into the air bag, the air bag expands, squeezes the oil bag, and the residual air in the oil bag flows back to the fuel barrel together with the fuel through the fuel filling pipe, the solenoid valve II, and the oil extraction pipe; after the outlet pressure of the air booster pump reaches the predetermined pressure, the air booster pump stops working, the solenoid valve II closes, the refueling pump starts working, the solenoid valve I opens, the oil bag squeezes the air bag to exhaust air to the outside, the fuel flow meter records the amount of fuel injected into the oil bag, the fuel flow meter records the fuel flow reaches the soft fuel tank capacity, the refueling pump stops working, and the one-button fuel filling process is completed;

[0016] During the oil pumping operation, press the fuel suction button, solenoid valve II opens, solenoid valve I closes, the air booster pump starts, and compressed air is injected into the airbag. The airbag expands and squeezes the oil bag. The fuel in the oil bag flows back to the fuel tank through the fuel filling pipe, solenoid valve II, and oil pumping pipe. After the outlet pressure of the air booster pump reaches the preset pressure, the remaining air and fuel in the oil bag are discharged, completing the oil pumping operation.

[0017] Furthermore, the predetermined proportion is 10%.

[0018] Furthermore, the predetermined pressure is 0.1-0.2 MPa.

[0019] Compared with the prior art, the advantages of the present invention include:

[0020] (1) When used in conjunction with a soft fuel tank, the program can independently complete the exhaust and refueling process of the soft fuel tank; (2) A vacuum pump is avoided during the exhaust process before refueling, reducing the difficulty and cost of selecting the entire refueling equipment; (3) A small amount of fuel is pre-filled during the refueling process, and the air bag squeezes the oil bag, and the air and fuel in the oil bag are discharged together. After the air is exhausted, a small amount of residual fuel still occupies the internal space of the oil bag. Compared with vacuum extraction, this method of air removal is more thorough; (4) The program can independently complete the fuel suction process of the soft fuel tank; (5) After the refueling and oil extraction process is completed, the program can automatically disconnect the pipeline connection between the fuel tank and the refueling equipment.

[0021] In addition to the features and advantages described above, the principles and other features and advantages of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the automatic exhaust and refueling device for the air bleed boost vacuum oil tank of the present invention.

[0023] Figure 2 This is a schematic diagram of the fuel filling device.

[0024] Figure 3 This is a schematic diagram of the internal components of the fuel filling device.

[0025] Figure 4 This is a schematic diagram of the automatic plug removal device.

[0026] Figure 5 This is a diagram of the locked state of the automatic plug removal device.

[0027] Figure 6 Unlocks the status diagram for the automatic unplug device.

[0028] Reference numerals in the figure: 1. soft oil tank; 11. oil bladder; 12. air bladder; 13. air bladder interface; 14. oil bladder interface; 2. air boost pipe; fuel filling device; 31. compressed air outlet; 32. fuel outlet; 33. fuel inlet; 34. display screen; 35. fuel filling button; 36. fuel suction button; 37. solenoid valve I; 38-1. first T-type tee; 38-2. second T-type tee; 39. air boost pump; 310. refueling device control unit; 311. Y-type tee; 312. fuel flow meter; 313. refueling pump; 314. solenoid valve II; 4. fuel filling pipe; 5. oil extraction pipe; 61. self-sealing female connector; 62. self-sealing male connector; 63. connecting rod; 64. servo rocker arm; 65. servo; 66. steel ball; 67. self-sealing connector snap ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. The implementation of the present invention is described in detail below with reference to the specific embodiments.

[0030] Combine Figure 1 An automatic venting and refueling device for an air-entrained, vacuum-pressurized fuel tank. The fuel tank is a soft fuel tank 1, comprising a fuel bladder 11 and air bladders 12 connected to either side of the bladder 11. Each air bladder 12 is connected to the bladder 11 but not in communication. The refueling device includes a fuel filling device 3, a fuel filling pipe 4, an air-pressurized pipe 2, and an oil extraction pipe 5. The pipe joints between the fuel filling pipe 4, the air-pressurized pipe 2, the oil extraction pipe 5, the fuel filling device 3, and the soft fuel tank 1 all utilize self-sealing joints. Specifically, the joints connecting the fuel filling pipe 4, the air-pressurized pipe 2, and the soft fuel tank 1 utilize an automatic plug-out device.

[0031] Combine Figure 2 The fuel filling device 3 is divided into an external display and operation section and an internal device section. The external display and operation section consists of a display screen 34, a fuel filling button 35, and a fuel aspiration button 36. The display screen 34 has a touch function, which allows the volume of the soft fuel tank 1 to be input, and then the refueling process can be set by the program.

[0032] Combine Figure 3 The internal equipment of the fuel filling device 3 consists of a fuel circuit, a pressurized air circuit, and a refueling device control unit 310. The fuel circuit connects the fuel outlet 32 ​​to the Y-shaped tee 311 and then splits into two branches. One branch is connected to the solenoid valve II 314, and the other branch is connected to the refueling pump 313 and the fuel flow meter 312. The two branches then merge into the first T-shaped tee 38-1 and then to the fuel inlet 33. The pressurized air circuit connects the compressed air outlet 31 to the second T-shaped tee 38-2 and splits into two branches. One branch is connected to the air booster pump 39, and the other branch is connected to the solenoid valve I 37, which controls whether the airbag is connected to the atmosphere. The refueling device control unit 310 receives data from the display screen 34, including the volume of the soft fuel tank 1, signals from the fuel filling button 35, signals from the fuel suction button 36, data from the fuel flow meter 312, and data from the outlet pressure of the air booster pump 39. It controls the display screen 34 for the refueling device status, the operation of the refueling pump 313, the operation of the air booster pump 39, and the switching of solenoid valves I 37 and II 314. The fuel flow meter 312 provides real-time fuel flow feedback to the refueling device control unit 310, which can manually reset the count before each refueling pump 313 is activated.

[0033] Combine Figure 3 、 Figure 4During refueling, after connecting the refueling lines, the volume of soft fuel tank 1 is entered on display screen 34, and the fuel fill button 35 is pressed. The program automatically executes the following automatic operations: solenoid valve I 37 opens, airbag 12 is vented to atmosphere, solenoid valve II 314 closes, the fuel bypass is closed, and refueling pump 313 operates. Fuel is pumped from fuel tank 6, flows through oil extraction pipe 5, refueling pump 313, fuel flow meter 312, and fuel filling pipe 4, and enters fuel bag 11, metering 10% of the volume of soft fuel tank 1. Refueling pump 313 stops, solenoid valve II 314 opens, solenoid valve I 37 closes, and air booster pump 39 starts, injecting compressed air into airbag 12. Airbag 12 expands, squeezing fuel bag 11. Residual air in fuel bag 11, along with the fuel, flows back into fuel tank 6 through fuel filling pipe 2, solenoid valve II 314, and oil extraction pipe 5. When the outlet pressure of the air booster pump 39 reaches 0.1-0.2 MPa, the air booster pump 39 stops operating, the airbag 12 fully inflates, and the remaining air and fuel in the fuel bladder 11 are completely expelled. Solenoid valve II 314 closes, the refueling pump 313 operates, and solenoid valve I 37 opens, airing the airbag 12 to the outside. The fuel flow meter 312 records the amount of fuel added to the fuel bladder 11. When the fuel flow rate recorded by the fuel flow meter 312 reaches the capacity of the soft fuel tank 1, the refueling pump 313 stops operating. Simultaneously, the automatic self-sealing joint removal device removes the two self-sealing joints connected to the fuel tank. Solenoid valve II 314 opens, completing the one-touch fuel filling process. When refueling, first add a small amount of fuel to the soft fuel tank 1. The airbag 12 inflates and squeezes the fuel bladder 11, expelling the air and fuel mixed together from the nozzle at the top of the tank. When the air is completely expelled, a small amount of fuel may still remain in the tank. This small amount of residual fuel does not affect the complete filling of the tank. Then stop pressurizing the airbag 12, restore the airbag 12 to the outside ventilation state, and add fuel to the oil bag 11 again. The flow meter monitors that the fuel filling amount reaches the set value, and the fuel filling is completed.

[0034] Combine Figure 3 、 Figure 4 During the fuel pumping operation, after the fuel line is connected, the fuel pump button 36 is pressed, solenoid valve II opens, solenoid valve I closes, and air booster pump 39 starts, injecting compressed air into airbag 12. Airbag 12 expands, squeezing oil bladder 11. The fuel in oil bladder 11 flows back into fuel tank 6 through fuel filling pipe 2, solenoid valve II 314, and oil pumping pipe 5. When the pressure of air booster pump 39 reaches 0.1-0.2 MPa, airbag 12 fully expands, and the remaining air and fuel in oil bladder 11 are completely discharged.

[0035] The oil bag interface 14 and the air bag interface 13 use a self-sealing male joint 62, one end of the fuel filling pipe 4 and one end of the air boost pipe 2 use a self-sealing female joint 61, the fuel outlet 32, the compressed air outlet 31 and the oil inlet 33 use a self-sealing female joint 61, and the pipeline is kept sealed at the moment of disconnection. The other end of the fuel filling pipe 4, the other end of the air boost pipe 2 and one end of the oil extraction pipe 5 use a self-sealing male joint 62.

[0036] Combine Figure 5 The automatic plug removal device includes a self-sealing male connector 62, a self-sealing female connector 61, and a servo 65, a servo rocker arm 64, and a connecting rod 63 installed on the self-sealing female connector 61. The two ends of the connecting rod 63 are respectively connected to the self-sealing connector clamp 67 and the servo rocker arm 64. When the servo rocker arm 64 is vertically downward, the self-sealing connector clamp 67 is in a locked state, pressing the steel ball 66 on the side of the self-sealing female connector 61 to complete the connector locking. Figure 6 When the servo rocker arm 64 turns to the right, the servo rocker arm 64 pulls the connecting rod 63, which moves to the right, driving the self-sealing joint clamp 67 to move. When the self-sealing joint clamp 67 moves to the relaxed state, the steel ball 66 on the side of the self-sealing joint female head 61 is exposed, and the self-sealing joint female head 61 is loosened and separated from the self-sealing joint male head 62. After separation, the self-sealing joint male head 62 and the self-sealing joint female head 61 are both in the self-sealing state.

[0037] When using the above-mentioned automatic exhaust and refueling device, before refueling, the self-sealing joints of the fuel filling pipe and the air boost pipe are connected to the self-sealing joints of the fuel tank. Pressing the fuel filling button can complete the operations of exhausting and refueling the fuel tank and disconnecting the fuel filling pipe and the air boost pipe. Pressing the fuel suction button can complete the operations of draining the fuel tank and disconnecting the fuel filling pipe and the air boost pipe.

[0038] The automatic venting and refueling device for a bleed air-pressurized vacuum fuel tank of the present invention features a fuel filling device 3 that allows for one-touch fuel filling and one-touch fuel extraction, eliminating the need for manual venting during use. Upon determining that fuel filling and fuel extraction are complete, the refueling device control unit 310 controls the automatic removal of the self-sealing connector 65, thus automating both refueling and fuel extraction.

[0039] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic exhaust and refueling device for an air-entrained, pressurized, vacuum oil tank, wherein the oil tank is a soft oil tank (1), comprising an oil bag (11) and a plurality of air bags (12), each of which is connected to the oil bag (11) but not in communication, and is characterized in that: The device comprises an air boost pipe (2), a fuel filling device (3), a fuel filling pipe (4), and an oil extraction pipe (5). The fuel filling device (3) comprises a compressed air outlet (31), a fuel outlet (32), an oil inlet (33), a fuel path, and a pressurized air path. One end of the air boost pipe (2) is connected to each air bag (12), and the other end is connected to the compressed air outlet (31) of the fuel filling device (3). One end of the fuel filling pipe (4) is connected to the oil bag (11), and the other end is connected to the fuel outlet (32) of the fuel filling device (3). One end of the oil extraction pipe (5) is connected to the oil inlet (33) of the fuel filling device (3), and the other end is connected to the fuel tank (6). The fuel line is connected between the fuel outlet (32) and the fuel inlet (33), and the pressurized air line is connected to the compressed air outlet (31); The fuel line includes a Y-shaped tee (311) and two branches. The fuel outlet (32) is connected to the Y-shaped tee (311) and then connected to the two branches, one of which is connected to the solenoid valve II (314), and the other is connected to the fuel pump (313) and the fuel flow meter (312). The two branches are then merged into a first T-shaped tee (38-1) and connected to the fuel inlet (33). The pressurized air circuit includes a second T-shaped three-way connection (38-2) and two branches. The compressed air outlet (31) is connected to the second T-shaped three-way connection (38-2) and then connected to the two branches respectively, one of which is connected to the air booster pump (39) and the other is connected to the solenoid valve I (37).

2. The automatic exhaust and refueling device for bleed air boosting vacuum oil tank according to claim 1, characterized in that: The fuel filling device (3) further comprises a fuel filling device control unit (310), a display screen (34), a fuel filling button (35), and a fuel suction button (36). The display screen (34) has a touch function and can input the volume of the soft fuel tank (1). The fuel filling device control unit (310) is used to receive the volume of the soft fuel tank (1), the fuel filling button (35) signal, the fuel suction button (36) signal, the fuel flow meter (312) data, and the air booster pump (39) outlet pressure data input by the display screen (34), and control the display of the fuel filling device status on the display screen (34), the start and stop of the fuel filling pump (313), the start and stop of the air booster pump (39), and the on and off of the solenoid valve I (37) and the solenoid valve II (314).

3. The automatic exhaust and refueling device for bleed air boosting vacuum oil tank according to claim 2, characterized in that: The oil bag (11) includes an oil bag interface (14), one end of the fuel filling pipe (4) is connected to the oil bag interface (14), each of the air bags (12) includes an air bag interface (13), and one end of the air boost pipe (2) is connected to each air bag interface (13).

4. The automatic exhaust and refueling device for bleed air boosting vacuum oil tank according to claim 3, characterized in that: The oil bag interface (14) and the air bag interface (13) use a self-sealing male joint (62); one end of the fuel filling pipe (4) and one end of the air boost pipe (2) use a self-sealing female joint (61); the fuel outlet (32), the compressed air outlet (31) and the oil inlet (33) use a self-sealing female joint (61); the other end of the fuel filling pipe (4), the other end of the air boost pipe (2) and one end of the oil extraction pipe (5) use a self-sealing male joint (62).

5. The automatic exhaust and refueling device for bleed air boosting vacuum oil tank according to claim 4, characterized in that: The invention also includes a steering gear (65), a steering gear rocker arm (64), a connecting rod (63), and a self-sealing joint snap ring (67). The self-sealing joint female head (61) includes a steel ball (66) arranged on the side. The self-sealing joint snap ring (67) is sleeved on the outside of the self-sealing joint female head (61). The two ends of the connecting rod (63) are respectively connected to the self-sealing joint snap ring (67) and one end of the steering gear rocker arm (64). The other end of the steering gear rocker arm (64) is connected to the steering gear (65). When the steering gear rocker arm (64) is vertically downward, the self-sealing joint snap ring (67) is in a locked state, pressing the steel ball on the side of the self-sealing joint female head (61). (66), completing the locking between the self-sealing joint male head (62) and the self-sealing joint female head (61), when the servo rocker arm (64) rotates, the servo rocker arm (64) pulls the connecting rod (63) to drive the self-sealing joint clamping ring (67) to move away from the self-sealing joint male head (62), the self-sealing joint clamping ring (67) can move to a relaxed state, the steel ball (66) on the side of the self-sealing joint female head (61) is exposed, the self-sealing joint female head (61) is loosened, and separation is completed with the self-sealing joint male head (62), and after separation, the self-sealing joint male head (62) and the self-sealing joint female head (61) will be in a self-sealing state respectively.

6. The method for using the automatic exhaust and refueling device for the bleed air boost vacuum oil tank according to any one of claims 2 to 5, characterized in that: During the refueling operation, the volume of the soft fuel tank (1) is input on the display screen (34), and the fuel filling button (35) is pressed. The solenoid valve I (37) is opened, the air bag (12) is vented to the atmosphere, the solenoid valve II (314) is closed, the refueling pump (313) is operated, and the fuel is extracted from the fuel barrel (6), flows through the oil extraction pipe (5), the refueling pump (313), the fuel flow meter (312), the fuel filling pipe (4), and enters the oil bag (11), and the fuel of the predetermined proportion of the volume of the soft fuel tank (1) is filled; the refueling pump (313) stops working, the solenoid valve II (314) is opened, the solenoid valve I (37) is closed, the air booster pump (39) is opened, and compressed air is injected into the air bag (12). The air bag (12) The oil bag (11) expands and squeezes, and the residual air in the oil bag (11) flows back to the fuel tank (6) together with the fuel through the fuel filling pipe (4), the electromagnetic valve II (314), and the oil extraction pipe (5); after the outlet pressure of the air booster pump (39) reaches the predetermined pressure, the air booster pump (39) stops working, the electromagnetic valve II (314) is closed, the refueling pump (313) works, the electromagnetic valve I (37) opens, the oil bag (11) squeezes the air bag (12) to exhaust the air, the fuel flow meter (312) records the amount of fuel added to the oil bag (11), the fuel flow meter (312) records that the fuel flow reaches the volume of the soft fuel tank (1), the refueling pump (313) stops working, and the one-button fuel filling process is completed; During the oil extraction operation, the fuel extraction button (36) is pressed, the solenoid valve II (314) is opened, the solenoid valve I (37) is closed, and the air booster pump (39) is turned on to inject compressed air into the air bag (12). The air bag (12) expands and squeezes the oil bag (11). The fuel in the oil bag (11) flows back to the fuel barrel (6) through the fuel filling pipe (4), the solenoid valve II (314), and the oil extraction pipe (5). After the outlet pressure of the air booster pump (39) reaches the predetermined pressure, the remaining air and fuel in the oil bag (11) are discharged, and the oil extraction operation is completed.

7. The method for using the automatic exhaust and refueling device for the bleed air boost vacuum tank according to claim 6, characterized in that: The predetermined ratio is 10%.

8. The method for using the automatic exhaust and refueling device for bleed air boosting and vacuum oil tank according to claim 6, characterized in that: The predetermined pressure is 0.1-0.2 MPa.

Images