Airplane refueling vehicle

Abstract

The utility model provides an aircraft refueling vehicle. The aircraft refueling vehicle comprises a tractor and a refueling trailer. The tractor is provided with a power supply battery providing power for the tractor and a discharging interface electrically connected with the power supply battery. The refueling trailer comprises a trailer undercarriage detachably connected with the tractor, a hydraulic system arranged on the trailer undercarriage and a loading assembly driven by the hydraulic system to work, the hydraulic system is provided with an electric hydraulic pump electrically connected with the discharging interface, and the electric hydraulic pump is used for converting electric energy into hydraulic energy. The aircraft refueling vehicle provided by the utility model can assist in refueling operation of an aircraft, and also has reliable safety and good environmental protection property.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of aircraft refueling, and in particular to an aircraft refueling truck. BACKGROUND

[0002] Airports are important transportation hubs connecting cities with the rest of the world. Large airports usually have a support oil depot and an underground refueling pipeline connecting the support oil depot and the parking space. The underground refueling pipeline often cannot extend to every parking space, and an aircraft refueling truck is needed to connect between the ground well of the underground refueling pipeline and the parking space to supply oil for the aircraft, so as to support the safe and stable operation of the airport.

[0003] In the related art, the aircraft refueling truck is usually driven by a gasoline or diesel engine to assist the aircraft refueling personnel in aircraft refueling operations. However, during the driving of the aircraft refueling truck, the combustion of gasoline or diesel fuel also releases a large amount of pollutants such as carbon dioxide or particulate matter, which has a negative impact on air quality and the greenhouse effect. Moreover, gasoline or diesel fuel also has a high risk of explosion, which poses a safety hazard to airport operation. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present disclosure provides an aircraft refueling truck that can assist in aircraft refueling operations while improving safety and environmental protection.

[0005] Specifically, the present disclosure is implemented by the following technical solutions:

[0006] The aircraft refueling truck provided by the present disclosure includes a tractor and a refueling trailer. The tractor is provided with a power supply battery for providing power for the tractor and a discharge interface electrically connected to the power supply battery. The refueling trailer includes a trailer disc detachably connected to the tractor, a hydraulic system provided on the trailer disc, and an upper assembly driven by the hydraulic system for operation. The hydraulic system is provided with an electric hydraulic pump electrically connected to the discharge interface, and the electric hydraulic pump is used to convert electrical energy into hydraulic energy.

[0007] The technical solutions of the present disclosure are further described as follows:

[0008] In one embodiment, the power supply battery includes a lithium ion battery, a solid-state battery, or a hydrogen fuel cell.

[0009] In one of the embodiments, the upper assembly includes a foot connected to the trailer deck in a sliding manner, the foot having a supporting state in which the foot is lowered along the trailer deck and a retracted state in which the foot is raised along the trailer deck. The hydraulic system further includes a foot hydraulic cylinder connected to the electric hydraulic pump in a pipeline manner, a piston rod of the foot hydraulic cylinder being connected to the foot. In the supporting state of the foot, the electric hydraulic pump pumps hydraulic oil into a rodless oil chamber of the foot hydraulic cylinder to drive the piston rod of the foot hydraulic cylinder to extend, so as to lower the foot along the trailer deck after the electric hydraulic pump is powered on. In the retracted state of the foot, the electric hydraulic pump pumps hydraulic oil into a rod oil chamber of the foot hydraulic cylinder to drive the piston rod of the foot hydraulic cylinder to retract, so as to raise the foot along the trailer deck after the electric hydraulic pump is powered on.

[0010] In one of the embodiments, the upper assembly includes a refueling lifting platform connected to the trailer deck, the refueling lifting platform having a refueling state in which the refueling lifting platform is raised relative to the trailer deck and a reset state in which the refueling lifting platform is lowered relative to the trailer deck. The hydraulic system further includes a refueling hydraulic cylinder connected to the electric hydraulic pump in a pipeline manner, a piston rod of the refueling hydraulic cylinder being connected to the refueling lifting platform. In the refueling state of the refueling lifting platform, the electric hydraulic pump pumps hydraulic oil into a rodless oil chamber of the refueling hydraulic cylinder to drive the piston rod of the refueling hydraulic cylinder to extend, so as to raise the refueling lifting platform after the electric hydraulic pump is powered on. In the reset state of the refueling lifting platform, the electric hydraulic pump pumps hydraulic oil into a rod oil chamber of the refueling hydraulic cylinder to drive the piston rod of the refueling hydraulic cylinder to retract, so as to lower the refueling lifting platform after the electric hydraulic pump is powered on, or the refueling lifting platform is lowered by its own gravity or elastic reset force.

[0011] In one of the embodiments, the upper assembly further includes a winding drum mounted to the trailer deck and a refueling pipe wound on the winding drum, the winding drum having a pay-off state in which the refueling pipe is unwound and a winding state in which the refueling pipe is wound. The hydraulic system further includes a winding motor connected to the electric hydraulic pump in a pipeline manner, an output shaft of the winding motor being connected to the winding drum. In the pay-off state of the winding drum, the refueling pipe is unwound by an external force to drive the winding drum to rotate forward, so as to drive the output shaft to rotate forward. In the winding state of the winding drum, the electric hydraulic pump pumps hydraulic oil into an oil chamber of the winding motor to drive the output shaft to rotate reversely, so as to drive the winding drum to rotate reversely and wind the refueling pipe.

[0012] In one of the embodiments, the upper assembly further includes a pipeline landing gear connected to the trailer deck in a sliding manner and a well connecting pipe arranged on the pipeline landing gear, the well connecting pipe being used to connect between the refueling pipe and a well pipeline.

[0013] In one of the embodiments, the refueling trailer further includes a charging battery arranged on the trailer deck and a work assembly electrically connected to the charging battery, the charging battery being charged through a discharging interface.

[0014] In one of the embodiments, the work assembly includes at least one of a driving wheel for driving the trailer deck to move, a warning light and a flowmeter.

[0015] In one of the embodiments, the rechargeable battery comprises a lead-acid battery.

[0016] In one of the embodiments, the refueling trailer further comprises an electric air compressor arranged on the trailer platform and a pneumatic assembly driven by the electric air compressor, the electric air compressor is electrically connected with the discharge interface to convert electric energy into pneumatic energy.

[0017] In one of the embodiments, the aircraft refueling truck further comprises a connecting assembly, the connecting assembly comprises a towing member connected with the towing vehicle and a trailer member connected with the refueling trailer, the towing member has a towing state connected with the trailer member and a disconnection state separated from the trailer member. One of the towing member and the trailer member is provided with an electromagnet, and the other is provided with a magnetic member magnetically matched with the electromagnet, the electromagnet is electrically connected with the connecting circuit between the towing vehicle and the refueling trailer. In the towing state of the towing member, the electromagnet is powered on and attracted to the magnetic member to fix the towing member and the trailer member. In the disconnection state of the towing member, the electromagnet is powered off and separated from the magnetic member to separate the towing member and the trailer member.

[0018] In one of the embodiments, the connecting assembly further comprises a leakage protection electrically connected with the connecting circuit between the towing vehicle and the refueling trailer, when the leakage protection cuts off the connecting circuit, the towing member is in the disconnection state to separate the towing vehicle and the refueling trailer.

[0019] The technical scheme provided by the embodiments of the present disclosure has at least the following beneficial effects:

[0020] The aircraft refueling truck provided by the present application can be divided into a towing vehicle and a refueling trailer when performing refueling operations, the towing vehicle provides driving power for itself and also provides operating power for the refueling trailer. The upper assembly of the refueling trailer can be driven by a hydraulic system, the electric hydraulic pump in the hydraulic system can obtain electric energy by connecting the discharge interface, and convert the electric energy provided by the towing vehicle into hydraulic energy of the refueling trailer, thereby driving the upper assembly of the refueling trailer to operate to assist the aircraft refueling personnel to complete the refueling operation.

[0021] Therefore, the aircraft refueling truck provided by the present disclosure does not need to be powered by a gasoline or diesel engine, but can be powered by a power supply battery of the towing vehicle, thereby reducing the emission of pollutants such as carbon dioxide or particulate matter and improving environmental pollution. At the same time, the power supply battery has a lower risk of explosion compared to gasoline or diesel during use, which can further reduce the safety hazards of airport operation and improve safety.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which form a part of this disclosure, are intended to provide further understanding of the disclosure and are incorporated herein in their entirety. The description and illustration of the illustrative embodiments of the present disclosure are intended to provide a descriptive, rather than limiting, description of the disclosure.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings needed in the embodiments description. Obviously, the drawings in the following description only constitute some embodiments of the present disclosure, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] Figure 1 Structure diagram of the aircraft refueling vehicle shown in an embodiment.

[0026] Figure 2 Principle block diagram of the tractor providing power for the refueling trailer shown in an embodiment.

[0027] Figure 3 Principle block diagram of the hydraulic system driving the upper assembly to work shown in an embodiment.

[0028] Figure 4 Structure diagram of the refueling trailer shown in an embodiment.

[0029] Figure 5 Structure diagram of the refueling trailer shown in an embodiment. Figure 4 Structure diagram of the refueling trailer shown in an embodiment.

[0030] Figure 6 Principle block diagram of the tractor providing power for the refueling trailer shown in another embodiment.

[0031] Reference signs:

[0032] 1-aircraft refueling vehicle; 10-tractor; 11-power supply battery; 12-discharge interface; 20-refueling trailer; 21-trailer disc; 22-hydraulic system; 221-electric hydraulic pump; 222-foot hydraulic cylinder; 223-refueling hydraulic cylinder; 224-winding motor; 23-upper assembly; 231-foot support; 232-refueling lifting platform; 233-winding disc; 234-refueling pipe; 235-pipe landing gear; 236-connection pipe of foot well; 24-charging battery; 25-working assembly; 251-driving wheel; 26-outer shell; 30-connection assembly; 31-tractor part; 32-trailer part; 33-electromagnet; 34-magnetic part; 35-creepage protection. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments (or “embodiments”) of the present disclosure will be described clearly and completely in combination with the drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0034] If the terms related to directionality or positional relationship (for example, up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, height, counterclockwise, clockwise, axial, radial, circumferential, etc.) are involved in the embodiments of the present disclosure, such terms are only used to explain the relative positional relationship, motion condition, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality or positional relationship will also change accordingly.

[0035] Airports are important transportation hubs connecting cities and the world. Large airports usually have a secure oil depot and an underground refueling pipeline connecting the secure oil depot and the parking space. Among them, the underground refueling pipeline often cannot extend to each parking space, and a plane refueling vehicle is needed to connect between the well of the underground refueling pipeline and the parking space to supply oil to the plane, so as to support the safe and stable operation of the airport.

[0036] In the related art, the plane refueling vehicle is usually driven by a gasoline or diesel engine to assist the plane refueling personnel to carry out plane refueling operations. However, in the driving process of the plane refueling vehicle, the combustion of gasoline or diesel fuel also releases a large amount of pollutants such as carbon dioxide or particulate matter, which has a negative impact on air quality and the greenhouse effect. Moreover, gasoline or diesel also has a high risk of explosion, which poses a safety hazard to airport operation.

[0037] Therefore, the present application provides a plane refueling vehicle which can assist in plane refueling operations while also having reliable safety and good environmental protection, so as to improve the flammable and explosive risks and environmental pollution brought by gasoline or diesel, and thus to ensure the stable operation of the airport.

[0038] The plane refueling vehicle 1 provided by the present application will be described below in conjunction with the drawings of the specification.

[0039] Referring to Figures 1 to 3 , Figure 1 is a structural schematic diagram of the plane refueling vehicle 1 shown in an embodiment, Figure 2 is a principle block diagram of the tractor 10 providing power for the refueling trailer 20, Figure 3 is a principle block diagram of the hydraulic system 22 driving the superstructure assembly 23 to work. The plane refueling vehicle 1 provided by the present application comprises a tractor 10 and a refueling trailer 20. The tractor 10 is provided with a power supply battery 11 for providing power for the tractor 10 and a discharge interface 12 electrically connected with the power supply battery 11. The refueling trailer 20 comprises a trailer disc 21 detachably connected with the tractor 10, a hydraulic system 22 arranged on the trailer disc 21, and a superstructure assembly 23 driven to work by the hydraulic system 22. The hydraulic system 22 is provided with an electric hydraulic pump 221 electrically connected with the discharge interface 12, and the electric hydraulic pump 221 is used to convert electric energy into hydraulic energy.

[0040] It should be noted that the tractor 10 is used to provide the refueling trailer 20 with operating kinetic energy, and when the tractor 10 is connected and assembled with the refueling trailer 20, the tractor 10 is equivalent to a vehicle head and can tow the refueling trailer 20 to shuttle between various parking positions of the airport to assist the aircraft refueling personnel to complete the refueling operation. Among them, the tractor 10 can tow one refueling trailer 20 to move, or can tow multiple refueling trailers 20 to move, and the present disclosure does not make any limitation. When the tractor 10 tows multiple refueling trailers 20 to move, the multiple refueling trailers 20 can be arranged in sequence along the X direction in the figure, and the adjacent two refueling trailers 20 are connected through the hook to realize that one tractor 10 tows multiple refueling trailers 20 to move.

[0041] The built-in power supply battery 11 of the tractor 10 can be a new energy battery. The power supply battery 11 can not only serve as the power source for driving the tractor 10, but also can provide the refueling trailer 20 with operating kinetic energy through the discharge interface 12. It is equivalent to that the tractor 10 is built-in with a vehicle-mounted intelligent power station. The operating personnel can use the tractor 10 to externally connect the electric hydraulic pump 221 and other operating tools on the refueling trailer 20 through the external discharge socket, so as to provide the refueling trailer 20 with operating kinetic energy. In addition, the power supply battery 11 usually stores energy inside through chemical reaction and generates power by releasing electric current. In this way, the power supply mode of the power supply battery 11 is different from the power supply mode of the gasoline or diesel engine through the combustion mode. The power supply battery 11 can have good environmental protection and safety compared with gasoline or diesel.

[0042] The refueling trailer 20 is connected with the tractor 10 as a semitrailer. Among them, the trailer disc 21 can be connected with the tractor 10 through a hook, a ring or a plug-in connection and the like, so that the tractor 10 can tow the refueling trailer 20 to move. The trailer disc 21 can be fixed and spliced by various ways such as welding, threaded connection or gluing of members such as rods or plates, or the trailer disc 21 can also be integrally formed and processed, and the present disclosure does not make any limitation.

[0043] The upper assembly 23 on the trailer platform 21 can include a refueling ladder 232 for the aircraft refueling personnel to ride, a ground leg 231 for supporting the fixed trailer platform 21 during refueling operation, a refueling pipe 234 for conveying aviation fuel, a reel 233 for winding the refueling pipe 234, and the like, without limitation. These upper assemblies 23 can be driven to act by the hydraulic system 22 on the trailer platform 21. Among them, the hydraulic pump of the hydraulic system 22 can be set as an electric hydraulic pump 221, so that the electric hydraulic pump 221 can obtain electric energy through the connection of the discharge interface 12, and convert the electric energy into hydraulic energy, so as to pump the hydraulic oil in the hydraulic system 22 into each hydraulic cylinder, and then convert the hydraulic energy into mechanical energy, so as to drive the upper assembly 23 to act (for example, the lifting action of the refueling ladder 232, the lifting action of the ground leg 231, the winding action of the reel 233, and the like), to assist the aircraft refueling personnel to complete the refueling operation.

[0044] Therefore, the aircraft refueling vehicle 1 provided by the present disclosure is divided into a tractor 10 and a refueling trailer 20, and the tractor 10 provides driving power for itself and also provides operation power for the refueling trailer 20. Among them, the upper assembly 23 of the refueling trailer 20 can be driven by the hydraulic system 22, and the electric hydraulic pump 221 in the hydraulic system 22 can obtain electric energy by connecting the discharge interface 12, and convert the electric energy provided by the tractor 10 into hydraulic energy of the refueling trailer 20, so as to drive the upper assembly 23 of the refueling trailer 20 to act, so as to assist the aircraft refueling personnel to complete the refueling operation.

[0045] Therefore, the aircraft refueling vehicle 1 provided by the present disclosure does not need to be powered by a gasoline or diesel engine, and can be powered by the power supply battery 11 of the tractor 10 to reduce the emission of pollutants such as carbon dioxide or particulate matter, and improve environmental pollution. At the same time, the power supply battery 11 has a lower risk of explosion compared to gasoline or diesel during use, which can further reduce the safety hazards of airport operation and improve safety.

[0046] In some embodiments, in order to improve the endurance of the power supply battery 11 on the tractor 10, the power supply battery 11 includes a lithium ion battery, a solid-state battery, or a hydrogen fuel cell.

[0047] It should be noted that these batteries have a higher energy density, so they have better endurance. For example, the energy density of hydrogen is 120 MJ / kg to 140 MJ / kg, the energy density of solid-state batteries is 250 Wh / kg to 400 Wh / kg, and the energy density of lithium batteries is 150 Wh / kg to 250 Wh / kg. At the same time, these batteries have better charging efficiency and deep discharge capacity, have a longer service life, and are lighter in weight.

[0048] As an example, the power supply battery 11 can be set as a lithium iron phosphate battery, the battery capacity is set to 108.8kwh (108.8 degrees of electricity), the maximum external discharge power is 6KW, the minimum power value allowed for external discharge is 15%, the maximum power of the power supply battery 11 is 517P (380KW), the maximum torque is 700Nm, the fast charging time is 0.5 to 1 hour, and the slow charging time is 16 hours, 16.5 hours or 17 hours.

[0049] In some embodiments, to further improve the endurance of the power supply battery 11, the tractor 10 can also be provided with a battery temperature management system to monitor the use environment temperature and use temperature of the power supply battery 11.

[0050] For example, in a relatively cold environment, the battery temperature management system can include a low-temperature heating module. The low-temperature heating module can raise the operating temperature of the power supply battery 11, so that the power supply battery 11 returns to the appropriate operating temperature range (for example, the temperature range is 0°C to 45°C), so that the power supply battery 11 can be normally charged in a cold environment, and prevent charging failure caused by low temperature. At the same time, by heating the power supply battery 11, the internal resistance of the power supply battery 11 can be reduced, and the discharge efficiency of the power supply battery 11 can be improved, so that the power supply battery 11 can still provide sufficient power in a low-temperature environment.

[0051] Of course, when the temperature of the power supply battery 11 is relatively high, the battery temperature management system can also include a liquid cooling module. The liquid cooling module circulates the cooling liquid to absorb the heat generated by the power supply battery 11, so as to keep the power supply battery 11 stably operating in the appropriate operating temperature range, and prevent local overheating of the power supply battery 11.

[0052] Referring to Figure 3 and Figure 4 , Figure 3 A principle block diagram of the hydraulic system 22 driving the upper assembly 23 to work is shown in an embodiment, Figure 4A schematic view of the structure of the refueling trailer 20 is shown in an embodiment. In some embodiments, in order to facilitate the stable parking of the refueling trailer 20 to assist the aircraft refueling personnel to perform the refueling operation, the upper assembly 23 comprises a landing leg 231 in sliding connection with the trailer disc 21, and the landing leg 231 has a supporting state of falling along the trailer disc 21 and a retracted state of being away from the ground along the trailer disc 21. The hydraulic system 22 further comprises a landing hydraulic cylinder 222 in pipeline connection with the electric hydraulic pump 221, and the piston rod of the landing hydraulic cylinder 222 is connected with the landing leg 231. In the supporting state of the landing leg 231, the electric hydraulic pump 221 pumps hydraulic oil into the rodless oil chamber of the landing hydraulic cylinder 222 after being powered on, drives the piston rod of the landing hydraulic cylinder 222 to extend, and drives the landing leg 231 to fall to the ground. In the retracted state of the landing leg 231, the electric hydraulic pump 221 pumps hydraulic oil into the rod oil chamber of the landing hydraulic cylinder 222 after being powered on, drives the piston rod of the landing hydraulic cylinder 222 to retract, and drives the landing leg 231 to be away from the ground.

[0053] It should be noted that the landing hydraulic cylinder 222 has two working oil chambers, i.e. a rod oil chamber provided with a piston rod and a rodless oil chamber without a piston rod, and the two working oil chambers have oil ports respectively. When the electric hydraulic pump 221 pumps hydraulic oil into the rodless oil chamber of the landing hydraulic cylinder 222, the piston rod is driven to extend. When the electric hydraulic pump 221 pumps hydraulic oil into the rod oil chamber of the landing hydraulic cylinder 222, the piston rod is driven to retract.

[0054] As an example, after the landing hydraulic cylinder 222 is installed to the trailer disc 21, the piston rod of the landing hydraulic cylinder 222 extends in the direction opposite to Z in the figure and retracts in the direction of Z in the figure. In this way, when the aircraft refueling personnel performs the refueling operation, the landing leg 231 can fall from the trailer disc 21 to the airport apron in the direction opposite to Z to support between the airport apron and the aircraft refueling vehicle 1, so as to support the aircraft refueling vehicle 1 to be parked stably, so that the aircraft refueling personnel can perform the refueling operation. When the aircraft refueling personnel completes the refueling operation, the landing leg 231 can be lifted from the airport apron in the direction of Z to be retracted to the trailer disc 21, so as to facilitate the aircraft refueling vehicle 1 to drive away from the refueling position. In this way, the electric hydraulic pump 221 can control the piston rod of the landing hydraulic cylinder 222 to extend or retract by pumping oil to different oil chambers of the landing hydraulic cylinder 222, so as to drive the landing leg 231 to fall or retract.

[0055] In some embodiments, the landing leg 231 and the trailer disc 21 can be in sliding connection in the form of sliding groove and sliding block cooperation, guide block and guide rail cooperation, etc., which is not limited in the present disclosure.

[0056] Referring to Figure 3 and Figure 4 , Figure 3 a principle block diagram of the hydraulic system 22 driving the operation of the upper assembly 23 is shown in an embodiment, Figure 4Fig. 1 is a schematic view of a fueling trailer 20 in accordance with an embodiment. In some embodiments, to facilitate a fueler to connect a fuel hose 234 to a fuel port of an aircraft, the upper assembly 23 can further include a fueling lift 232 connected to the trailer deck 21, the fueling lift 232 having a raised fueling state and a reset state falling back to the trailer deck 21. The hydraulic system 22 further includes a fueling hydraulic cylinder 223 connected to the electric hydraulic pump 221 by a pipeline, a piston rod of the fueling hydraulic cylinder 223 being connected to the fueling lift 232. In the raised fueling state of the fueling lift 232, the electric hydraulic pump 221, upon energization, pumps hydraulic oil into a rodless oil chamber of the fueling hydraulic cylinder 223, driving the piston rod of the fueling hydraulic cylinder 223 to extend, to raise the fueling lift 232. In the reset state of the fueling lift 232, the electric hydraulic pump 221, upon energization, pumps hydraulic oil into a rod oil chamber of the fueling hydraulic cylinder 223, driving the piston rod of the fueling hydraulic cylinder 223 to retract, to lower the fueling lift 232, or the fueling lift 232 falls back to the trailer deck 21 by its own gravity or elastic reset force.

[0057] It is noted that the fuel port of the aircraft is usually arranged below a wing of the aircraft, the wing being at a certain height from a ground of an airport. In this way, the fueler can approach or move away from the fuel port below the wing by riding on the fueling lift 232 to connect or disconnect the fuel hose 234 to the fuel port, to complete the fueling operation.

[0058] It is noted that the fuel port of the aircraft is usually arranged below a wing of the aircraft, the wing being at a certain height from a ground of an airport. In this way, the fueler can approach or move away from the fuel port below the wing by riding on the fueling lift 232 to connect or disconnect the fuel hose 234 to the fuel port, to complete the fueling operation.

[0059] The oiling hydraulic cylinder 223 can also be a single-acting hydraulic cylinder. The single-acting hydraulic cylinder has one working oil chamber, and a spring can be arranged in a non-working oil chamber of the single-acting hydraulic cylinder to drive the piston rod to act by the elastic restoring force of the spring. The single-acting hydraulic cylinder can also be reset by the gravity of the oiling lifting platform 232. For example, the rodless oil chamber of the single-acting hydraulic cylinder serves as the working oil chamber, and the rod chamber of the single-acting hydraulic cylinder can be reset by the gravity or elastic force on one side. In this way, when the hydraulic oil enters the rodless oil chamber of the oiling hydraulic cylinder 223, the elastic member on one side of the rod chamber is compressed, the piston rod is in the extended state, and the oiling lifting platform 232 is in the raised position. If the rodless oil chamber no longer enters the oil, the elastic member on one side of the rod chamber can restore the elastic deformation to extrude the hydraulic oil in the rodless oil chamber, so that the piston rod is retracted to reset the oiling lifting platform 232. The principle of resetting the oiling lifting platform 232 by gravity is the same, and only the elastic member is removed, and the hydraulic oil in the rodless chamber is discharged by gravity, which is not described in detail in the present disclosure. In this way, when the oiling hydraulic cylinder 223 is a single-acting hydraulic cylinder, the oiling lifting platform 232 does not need to be pumped by the electric hydraulic pump 221 during resetting, which can save part of the electric energy.

[0060] In some embodiments, the oiling lifting platform 232 can be provided as a scissor-type hydraulic lifting platform, which not only has a simple structure, is easy to install, saves space, but also has a large lifting stroke.

[0061] In some embodiments, the upper-mounted assembly 23 can simultaneously include the ground leg 231 and the oiling lifting platform 232. In order to control the flow direction of the hydraulic oil pumped by the electric hydraulic pump 221, the hydraulic system 22 can also include control valves such as reversing valves, stop valves, or overflow valves, which are not limited in the present disclosure.

[0062] Referring to Figure 3 and Figure 4 , Figure 3 a principle block diagram of the hydraulic system 22 driving the upper-mounted assembly 23 to work is shown in an embodiment, Figure 4 a structural schematic diagram of the oiling trailer 20 is shown in an embodiment. In some embodiments, the upper-mounted assembly 23 further includes a winding drum 233 mounted on the trailer disc 21 and an oiling pipe 234 wound on the winding drum 233, and the winding drum 233 has a unwinding state of unwinding the oiling pipe 234 and a winding state of winding the oiling pipe 234. The hydraulic system 22 further includes a winding motor 224 connected with the electric hydraulic pump 221 by a pipeline, and an output shaft of the winding motor 224 is connected with the winding drum 233. In the unwinding state of the winding drum 233, the oiling pipe 234 is unwound by an external force, drives the winding drum 233 to rotate forward, and drives the output shaft to rotate forward. In the winding state of the winding drum 233, the electric hydraulic pump 221 pumps the hydraulic oil into the oil chamber of the winding motor 224 after being powered on, drives the output shaft to rotate reversely, drives the winding drum 233 to rotate reversely, and winds the oiling pipe 234.

[0063] It should be noted that the oiling pipe 234 is used to transport aviation fuel, and is used to supply fuel to the aircraft. The winding disc 233 can be provided in a disc shape, so that the oiling pipe 234 is wound and stored, which can save the space of the trailer disc 21, and can also avoid the oiling pipe 234 from being knotted. When the operating personnel pulls out the oiling pipe 234, the friction between the oiling pipe 234 and the winding disc 233 can drive the winding disc 233 to rotate, so that the winding disc 233 is unwound, so that the operating personnel can pull the oiling pipe 234 to the required connection length. One end of the oiling pipe 234 can be used to connect the oil drum or the ground well, and the other end of the oiling pipe 234 can be used to connect the aircraft fuel port, so as to supply fuel to the aircraft.

[0064] As an example, when the winding disc 233 rotates forward, the oiling pipe 234 is unwound, and when the winding disc 233 reverses, the oiling pipe 234 is wound. Forward rotation can be clockwise, and reverse rotation can be counterclockwise. In this way, the electric hydraulic pump 221 only needs to pump oil to the oil cavity of the hydraulic motor when winding to drive the output shaft of the hydraulic motor to reverse.

[0065] In some embodiments, in order to facilitate the transportation of aviation fuel in the ground well pipe to the aircraft fuel tank, the upper assembly 23 further comprises a pipe landing gear 235 slidingly connected with the trailer disc 21 and a ground well connecting pipe 236 provided on the pipe landing gear 235, and the ground well connecting pipe 236 is used to connect between the oiling pipe 234 and the ground well pipe.

[0066] It should be noted that the pipe landing gear 235 can be slidingly connected with the trailer disc 21 through a sliding groove or a sliding rail, and the present disclosure does not make any limitation. The ground well connecting pipe 236 can be detachably installed on the pipe landing gear 235, so as to move up and down with the pipe landing gear 235 relative to the trailer disc 21. The lifting principle of the pipe landing gear 235 can be the same as that of the ground leg 231, and the present disclosure does not make any redundancy.

[0067] In addition, a pulley can be provided on the pipe landing gear 235, so that when the pipe landing gear 235 lands, the operating personnel can pull the pipe landing gear 235 to drive the ground well connecting pipe 236 to move to the ground well pipe.

[0068] In some embodiments, in addition to the ground leg 231, the oiling lifting platform 232 and the winding disc 233, the upper assembly 23 can further comprise an oil pump. For example, the operating personnel can drive the oil pump to operate to extract the aviation fuel in the aircraft fuel tank. The oil pump comprises a hydraulic pump such as a vane pump or a plunger pump, and the present disclosure does not make any limitation.

[0069] Referring to Figure 4 and Figure 5 , Figure 4 is a structural schematic view of the oiling trailer 20 shown in an embodiment, Figure 5 is Figure 4The structure schematic diagram of the refueling trailer 20 provided with the shell 26 is shown. In some embodiments, in order to make the appearance of the refueling trailer 20 neat and beautiful, the refueling trailer 20 is further provided with the shell 26, and the upper-mounted assembly 23 can be arranged inside the shell 26.

[0070] Referring to Figures 4 to 6 , Figure 4 The structure schematic diagram of the refueling trailer 20 is shown for an embodiment, Figure 5 is Figure 4 The structure schematic diagram of the refueling trailer 20 provided with the shell 26 is shown, Figure 6 The principle block diagram of the tractor 10 providing power for the refueling trailer 20 is shown for another embodiment. In some embodiments, in order to facilitate the power supply of other working assemblies 25 on the refueling trailer 20, the refueling trailer 20 further includes the charging battery 24 arranged on the trailer disc 21 and the working assembly 25 electrically connected with the charging battery 24, and the power supply battery 11 charges the charging battery 24 through the discharging interface 12.

[0071] It should be noted that the capacity of the charging battery 24 is less than that of the power supply battery 11, which can be used as a backup battery on the refueling trailer 20 or a daily work power supply battery with a small power consumption. The working assembly 25 includes a warning light, which is used to prompt the working personnel and the airport personnel about the working condition of the aircraft refueling vehicle 1. The warning light can be connected with the charging battery 24. The working assembly 25 can further include a flow meter, which is used to monitor the delivery flow of the aviation fuel. The flow meter can be connected with the charging battery 24. Alternatively, the charging battery 24 can be a lead-acid battery, which has high safety and can reduce the risk of flammability and explosiveness.

[0072] In some embodiments, in order to facilitate the movement of the refueling trailer 20 with the tractor 10, the working assembly 25 further includes the driving wheel 251 driving the movement of the trailer disc 21. It should be noted that after the driving wheel 251 is electrically connected with the charging battery 24, the charging battery 24 can provide part of the power for the driving wheel 251, so that the driving wheel 251 can move forward by itself, thereby reducing the power consumption of the tractor 10 and the pulling force on the refueling trailer 20. At the same time, the driving wheel 251 can also share the pressure of the upper-mounted assembly 23 on the trailer disc 21, so that the trailer disc 21 is uniformly stressed.

[0073] In some embodiments, the refueling trailer 20 can further include the electric air compressor arranged on the trailer disc 21 and the pneumatic assembly driven by the electric air compressor, and the electric air compressor is electrically connected with the discharging interface 12 to convert the electric energy into the pneumatic energy. It should be noted that the electric air compressor is used to provide the air source, and the pneumatic assembly can be a Dethman, a pneumatic control electromagnetic valve or a pneumatic cylinder, which is not limited in the present disclosure.

[0074] Referring to Figure 1 and Figure 6 , Figure 1Fig. 1 is a schematic view of a structure of an aircraft refueling vehicle 1 according to an embodiment of the present application, Figure 6 Fig. 2 is a schematic view of a principle of the aircraft refueling vehicle 1 according to another embodiment of the present application. In some embodiments, the aircraft refueling vehicle 1 further comprises a connecting assembly 30 for connecting the tractor 10 and the trailer 20. The connecting assembly 30 comprises a tractor part 31 connected to the tractor 10 and a trailer part 32 connected to the trailer 20. The tractor part 31 has a connected state for connecting to the trailer part 32 and a disconnected state for separating from the trailer part 32. One of the tractor part 31 and the trailer part 32 is provided with an electromagnet 33, and the other is provided with a magnetic part 34 magnetically matched with the electromagnet 33. The electromagnet 33 is electrically connected to a connecting circuit between the tractor 10 and the trailer 20. In the connected state of the tractor part 31, the electromagnet 33 is powered to attract the magnetic part 34, so as to fix the tractor part 31 and the trailer part 32. In the disconnected state of the tractor part 31, the electromagnet 33 is powered off to separate from the magnetic part 34, so as to separate the tractor part 31 and the trailer part 32.

[0075] It should be noted that one of the tractor part 31 and the trailer part 32 can be provided as a slot, and the other can be provided as a tongue. The tractor 10 and the trailer 20 can be connected and separated by the insertion of the tractor part 31 and the trailer part 32. Meanwhile, in order to improve the connection reliability between the tractor part 31 and the trailer part 32, the electromagnet 33 and the magnetic part 34 are further provided between the tractor part 31 and the trailer part 32. If the electromagnet 33 is sleeved on the tongue, and the magnetic part 34 is fixed in the slot, when the electromagnet 33 is powered, the electromagnet 33 generates a magnetic attraction force to attract the magnetic part 34, so that the tongue and the slot are connected more firmly, and the tractor 10 and the trailer 20 are stably connected. When the electromagnet 33 is powered off, the electromagnet 33 loses the magnetic attraction force to attract the magnetic part 34, and the electromagnet 33 and the magnetic part 34 are separated, so that the tongue and the slot can be separated, and the tractor 10 and the trailer 20 are separated.

[0076] In some embodiments, in order to protect the tractor 10 and the trailer 20, the connecting assembly 30 further comprises a leakage protection 35 electrically connected to the connecting circuit between the tractor 10 and the trailer 20. When the leakage protection 35 cuts off the connecting circuit, the tractor part 31 is in the disconnected state, so as to separate the tractor 10 and the trailer 20.

[0077] It should be noted that the leakage protection 35 can be connected to the connecting circuit between the discharging interface 12 and the refueling trailer 20. When the leakage protection 35 detects that the leakage occurs, the leakage protection 35 can disconnect the connecting circuit, so that the electromagnet 33 loses power, the magnetic attraction between the electromagnet 33 and the magnetic force disappears, the plug can be pulled out of the socket, so that the tractor 10 and the refueling trailer 20 can be quickly separated, avoiding the damage to the upper assembly 23, and reducing the disaster cost.

[0078] In other embodiments, the traction piece 31 and the trailer piece 32 can also be provided as a Jans hook. Alternatively, the traction piece 31 and the trailer piece 32 are respectively provided with a socket, and the traction piece 31 and the trailer piece 32 are fixed by a pin penetrating into the two sockets. The present disclosure is not limited.

[0079] The technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present disclosure is not limited to the precise structure described in the above embodiments and shown in the drawings. Modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. An aircraft fueler characterized by, The utility model relates to a kind of refueling trailer, including: tractor, it is provided with the power supply battery for the tractor is powered and the discharge interface electrically connected with the power supply battery; And refueling trailer, including detachably connected with the tractor trailer disc, the hydraulic system of setting in the trailer disc and the upper assembly driven by the hydraulic system operation, the hydraulic system is equipped with the electric hydraulic pump electrically connected with the discharge interface, and the electric hydraulic pump is used to convert electric energy into hydraulic energy. The upper assembly includes a ground leg slidably connected to the trailer disc, and the ground leg has a supporting state of falling along the trailer disc and a retracted state of lifting off the trailer disc. The hydraulic system further includes a ground hydraulic cylinder connected to the electric hydraulic pump, and a piston rod of the ground hydraulic cylinder is connected to the ground leg.

2. The aircraft fueler of claim 1, wherein, In the supporting state of the ground leg, the electric hydraulic pump pumps hydraulic oil into the rodless oil chamber of the ground hydraulic cylinder after being powered on, drives the piston rod of the ground hydraulic cylinder to extend, and drives the ground leg to fall. In the retracted state of the ground leg, the electric hydraulic pump pumps hydraulic oil into the oil chamber with a rod of the ground hydraulic cylinder after being powered on, drives the piston rod of the ground hydraulic cylinder to retract, and drives the ground leg to lift off the ground. The upper assembly includes a refueling lifting platform connected to the trailer disc, and the refueling lifting platform has a refueling state of lifting relative to the trailer disc and a reset state of falling back to the trailer disc. The hydraulic system further includes a refueling hydraulic cylinder connected to the electric hydraulic pump, and a piston rod of the refueling hydraulic cylinder is connected to the refueling lifting platform.

3. The aircraft fueler of claim 1 or 2, wherein, In the refueling state of the refueling lifting platform, the electric hydraulic pump pumps hydraulic oil into the rodless oil chamber of the refueling hydraulic cylinder after being powered on, drives the piston rod of the refueling hydraulic cylinder to extend, and drives the refueling lifting platform to lift. In the reset state of the refueling lifting platform, the electric hydraulic pump pumps hydraulic oil into the oil chamber with a rod of the refueling hydraulic cylinder after being powered on, drives the piston rod of the refueling hydraulic cylinder to retract, and drives the refueling lifting platform to fall, or the refueling lifting platform falls back by its own gravity or elastic reset force. The upper assembly further includes a winding drum mounted on the trailer disc and a refueling pipe wound on the winding drum, and the winding drum has a unwinding state of unwinding the refueling pipe and a winding state of winding the refueling pipe. The hydraulic system further includes a winding motor connected to the electric hydraulic pump, and an output shaft of the winding motor is connected to the winding drum.

4. The aircraft fueler of claim 3, wherein, In the unwinding state of the winding drum, the refueling pipe is unwound by external force, drives the winding drum to rotate forward, and drives the output shaft to rotate forward. In the winding state of the winding drum, the electric hydraulic pump pumps hydraulic oil into the oil chamber of the winding motor after being powered on, drives the output shaft to rotate reversely, drives the winding drum to rotate reversely and winds the refueling pipe. The upper assembly further includes a pipeline landing gear slidably connected to the trailer disc and a well connecting pipe provided on the pipeline landing gear, and the well connecting pipe is used to connect between the refueling pipe and a well pipeline. ​ 5. The aircraft fueler of claim 4, wherein, ​ 6. The aircraft fueler of claim 1, wherein, The refueling trailer further comprises a charging battery arranged on the trailer disc and a working assembly electrically connected with the charging battery, and the power supply battery charges the charging battery through the discharging interface.

7. The aircraft fueler of claim 6, wherein, The working assembly comprises at least one of a driving wheel for driving the trailer disc to move, a warning light and a flow meter. And / or, the charging battery comprises a lead-acid battery.

8. The aircraft fueler of claim 1, wherein, The refueling trailer further comprises an electric air compressor arranged on the trailer disc and a pneumatic assembly driven by the electric air compressor, and the electric air compressor is electrically connected with the discharging interface to convert electric energy into pneumatic energy.

9. The aircraft fueler of claim 1, wherein, The aircraft refueling vehicle further comprises a connecting assembly, the connecting assembly comprises a towing part connected with the towing vehicle and a trailer part connected with the refueling trailer, the towing part has a connected state connected with the trailer part and a disconnected state separated from the trailer part; One of the towing part and the trailer part is provided with an electromagnet, and the other is provided with a magnetic part magnetically matched with the electromagnet, and the electromagnet is electrically connected with the connecting circuit between the towing vehicle and the refueling trailer; In the connected state of the towing part, the electromagnet is electrified and attracted to the magnetic part to fix the towing part and the trailer part; In the disconnected state of the towing part, the electromagnet is de-energized and separated from the magnetic part to separate the towing part and the trailer part.

10. The aircraft fueler of claim 9, wherein, The connecting assembly further comprises a leakage protection electrically connected with the connecting circuit between the towing vehicle and the refueling trailer, and when the leakage protection cuts off the connecting circuit, the towing part is in the disconnected state to separate the towing vehicle and the refueling trailer.

Images