Aircraft linear refueling platform

Abstract

The invention relates to an aircraft linear refueling platform, and belongs to the technical field of aircraft refueling, the aircraft linear refueling platform comprises a ground well pit body, a refueling unit, a lifting body, a folding refueling arm, a movable connecting arm, a well lid body and a lifting mechanism, the refueling unit is arranged in the ground well pit body, and the refueling unit is connected with a pre-buried oil pipe below an airport apron; the refueling unit is used for filtering fuel oil, the lifting body is slidably arranged in a ground well pit body in the vertical direction, the folding refueling arm is arranged on the lifting body, and the folding refueling arm is used for being unfolded to an aircraft refueling port for refueling or folded on the lifting body for storage. One end of the movable connecting arm is connected with the refueling unit, the other end of the movable connecting arm is connected with the folding refueling arm, and the movable connecting arm is used for conveying fuel oil. The refueling platform has the advantages that when refueling is not conducted, the refueling platform does not occupy the space of the airport additionally, and the possibility that the refueling platform interferes with other equipment of the airport is reduced.

Description

Technical Field

[0001] This application relates to the field of aircraft refueling technology, and in particular to an aircraft linear refueling platform. Background Technology

[0002] Currently, refueling of stationary aircraft at airports is usually done in two ways: ground refueling trucks and fixed ground refueling stations. Ground refueling trucks involve moving the trucks to the vicinity of the aircraft to refuel it, while fixed ground refueling stations involve extending the refueling line from the station to the aircraft's refueling port.

[0003] Both of the above-mentioned aircraft refueling methods have the problem of occupying a large amount of apron space and being prone to conflict with other airport equipment when the refueling equipment is not in use. Summary of the Invention

[0004] In order to prevent the refueling platform from occupying additional apron space when not refueling and to reduce the possibility of interference between the refueling platform and other airport equipment, this application provides an aircraft linear refueling platform.

[0005] The technical solution for an aircraft linear refueling platform provided in this application is as follows: An aircraft linear refueling platform, comprising: The well pit is embedded below the apron; A refueling unit is installed inside the pit and connected to a pre-buried oil pipe below the apron. The refueling unit is used to filter fuel. A lifting body, which is slidably installed in the pit along the vertical direction; A folding refueling arm is mounted on the lifting body. The folding refueling arm is used to extend to the aircraft refueling port for refueling or to be folded on the lifting body for storage. A movable connecting arm, one end of which is connected to a refueling unit and the other end of which is connected to a folding refueling arm, is used to deliver fuel; The manhole cover body is mounted on the lifting body and is used to seal or open the manhole. A lifting mechanism is installed inside the pit and is used to drive the lifting body to move up and down.

[0006] Preferably, the folding refueling arm includes a connecting pipe, a bend, a folding pipe, a connector pipe, and a refueling connector. The connecting pipe is mounted on the lifting body. The bend and the connecting pipe are connected via a first rotary connector. The rotation axis of the first rotary connector is vertical. Multiple folding pipes are provided, and these multiple folding pipes are sequentially connected via second rotary connectors. One end of one of the multiple folding pipes is connected to the bend via a third rotary connector, and the other end of the folding pipe is connected to the connector pipe via a fourth rotary connector. The rotation axes of the second and third rotary connectors are parallel to each other, and the rotation axis of the third rotary connector is perpendicular to the rotation axis of the first rotary connector. The rotation axis of the fourth rotary connector is perpendicular to both the rotation axes of the first and second rotary connectors. The refueling connector is connected to the connector pipe and is used to connect to the aircraft refueling port.

[0007] Preferably, each of the adjacent folded tubes is provided with a spring, and the spring is in a stretched state when the angle between the adjacent folded tubes is 180°.

[0008] Preferably, casters are provided on multiple folded pipes away from the refueling connector. When the angle between adjacent folded pipes is 180°, the casters on the multiple folded pipes are located at the same end of the corresponding folded pipe and on the side closest to the ground.

[0009] Preferably, the movable connecting arm includes an input pipe, a delivery pipe, and an output pipe. The input pipe is connected to the refueling unit, and the output pipe is connected to the connecting pipe. Multiple delivery pipes are provided, and the multiple delivery pipes are connected to each other in sequence through a fifth rotary joint. One end of the multiple delivery pipes is connected to the input pipe through a sixth rotary joint, and the other end of the delivery pipe is connected to the output pipe through a seventh rotary joint. The rotation axes of the fifth, sixth, and seventh rotary joints are parallel to each other and perpendicular to the rotation axis of the first rotary joint.

[0010] Preferably, the connecting pipe, bend pipe, folded pipe, joint pipe, input pipe, delivery pipe and output pipe are all made of rigid pipe.

[0011] Preferably, the connecting pipe, bend pipe, folded pipe, joint pipe, input pipe, conveying pipe, and output pipe are all made of stainless steel. A grounding flat iron is installed in the pit. Copper wires are connected between the connecting pipe and the bend pipe, between the bend pipe and the corresponding folded pipe, between adjacent folded pipes, between the joint pipe and the corresponding folded pipe, between the input pipe and the corresponding conveying pipe, between adjacent conveying pipes, between the output pipe and the corresponding conveying pipe, between the output pipe and the connecting pipe, and between the input pipe and the grounding flat iron.

[0012] Preferably, the first, second, third, fourth, fifth, sixth, and seventh rotary joints are all connected to the corresponding stainless steel pipes at both ends by copper strips.

[0013] Preferably, the lifting body is provided with a retaining seat, which corresponds one-to-one with the folding tube. The retaining seat is used to secure the folding tube. When the folding tube is secured in the corresponding retaining seat, the length direction of the folding tube is vertical.

[0014] Preferably, a well ring is provided on the well pit body, the well ring has an opening for the lifting body to move out or in, the well cover body is used to close or open the opening of the well ring, the lifting body has a connecting platform, the connecting pipe is fixedly inserted on the connecting platform, the bent pipe is located above the connecting platform, the movable connecting arm is located below the connecting platform, and the connecting platform is used to abut against the bottom wall of the well ring.

[0015] In summary, this application includes the following beneficial technical effects: When the refueling platform is not in use, the aircraft refueling equipment, including the lift and folding refueling arm, is located inside the pit, sealed by a manhole cover. This prevents the platform from occupying additional apron space and reduces the possibility of interference with other airport equipment. When refueling a stationary aircraft, the lift mechanism drives the lift to extend the folding refueling arm out of the pit. The arm is then detached from the lift and extended to the aircraft's refueling port for connection. The fuel, supplied through the pre-buried fuel line, is then filtered by the refueling unit and delivered to the aircraft's refueling port via the movable connecting arm and the folding refueling arm. After refueling, the folding refueling arm is folded back onto the lift for storage. The lift is then lowered back into the pit. By placing the refueling point close to the aircraft's refueling port, the workload for personnel is effectively reduced, and refueling efficiency is improved. Attached Figure Description

[0016] Figure 1 This is a structural cross-sectional view of the well pit in Embodiment 1 of this application.

[0017] Figure 2 This is a schematic diagram of the overall structure of the lifting body in Embodiment 1 of this application.

[0018] Figure 3 This is a schematic diagram of the folding refueling arm during the aircraft refueling process in Embodiment 1 of this application.

[0019] Figure 4 This is a schematic diagram of the folded refueling arm in the unfolded state in Embodiment 1 of this application.

[0020] Figure 5 yes Figure 4 Enlarged view of section A.

[0021] Figure 6 This is a top view of the refueling platform in Embodiment 1 of this application during the aircraft refueling process.

[0022] Figure 7 This is a schematic diagram of the overall structure of the refueling unit and the movable connecting arm in Embodiment 1 of this application.

[0023] Figure 8 This is a schematic diagram of the overall structure of the lifting body and lifting mechanism in Embodiment 1 of this application.

[0024] Figure 9 This is a partial exploded view of the lifting body in Embodiment 1 of this application.

[0025] Figure 10 This is a schematic diagram of the overall structure of the lifting body in Embodiment 2 of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Well pit body; 2. Refueling unit; 3. Lifting body; 4. Folding refueling arm; 41. Connecting pipe; 42. Bend; 43. Folding pipe; 44. Joint pipe; 45. Refueling joint; 5. Movable connecting arm; 51. Input pipe; 52. Delivery pipe; 53. Output pipe; 6. Lifting mechanism; 61. Counterweight; 62. Guide wheel; 63. Steel rope; 7. First rotary joint; 8. Second rotary joint; 9. Third rotary joint; 10. Fourth rotary joint; 11. Spring; 12. Caster; 13. Fifth rotary joint; 14. Sixth rotary joint; 15. Seventh rotary joint; 16. Copper wire; 17. Card seat; 18. Well ring; 19. Opening; 20. Connecting platform; 21. Bracket; 22. First locking mechanism; 23. Second locking mechanism; 24. Connecting rod; 25. Threaded cylinder; 26. Well cover body; 27. External thread section. Detailed Implementation

[0027] The following combination Figures 1-10 This application will be described in further detail.

[0028] Example 1:

[0029] This application discloses an aircraft linear refueling platform. (Refer to...) Figure 1The aircraft linear refueling platform includes a pit body 1, a refueling unit 2, a lifting body 3, a folding refueling arm 4, a movable connecting arm 5, a well cover 26, and a lifting mechanism 6. The pit body 1 is embedded below the apron and is made of concrete, with its upper surface flush with the apron surface. A pre-embedded oil pipe runs through the pit body 1, connecting to the fuel source. The refueling unit 2 is located within the pit body 1 and connects to the pre-embedded oil pipe extending into the pit body 1 from below the apron. The refueling unit 2 filters the fuel to ensure the cleanliness of the fuel supplied to the aircraft.

[0030] Reference Figure 1 and Figure 2 Two supports 21 are fixedly installed inside the pit body 1. The lifting body 3 is slidably installed between the two supports 21 inside the pit body 1 in a vertical direction. The upper end of the lifting body 3 can extend out of the pit body 1. The manhole cover 26 is fixedly installed on the upper end of the lifting body 3 and is used to seal or open the pit body 1. The folding refueling arm 4 is installed on the lifting body 3 and is located below the manhole cover 26. The folding refueling arm 4 is used to unfold to the aircraft refueling port for refueling or to fold on the lifting body 3 for storage. One end of the movable connecting arm 5 is connected to the refueling unit 2 and the other end is connected to the folding refueling arm 4. The movable connecting arm 5 can move and is used to transport the fuel processed by the refueling unit 2 into the folding refueling arm 4. The lifting mechanism 6 is installed on the supports 21 inside the pit body 1 and is used to drive the lifting body 3 to rise and fall.

[0031] When the refueling platform is not in use, the aircraft refueling equipment, including the elevator 3 and the folding refueling arm 4, are located within the pit 1, and the pit cover 26 seals the pit 1, thus not occupying additional apron space and helping to reduce the possibility of interference between the refueling platform and other airport equipment. When refueling an aircraft that is parked at the airport, the elevator 3 is driven by the elevator mechanism 6 to extend the folding refueling arm 4 out of the pit 1. Because the movable connecting arm 5 has a certain degree of mobility, it can adapt to the position of the folding refueling arm 4, ensuring the connection between the folding refueling arm 4 and the refueling unit 2. Then, the folding refueling arm 4 is lifted from the elevator 3. The refueling unit 2 is used to connect to the aircraft's refueling port. The fuel delivered by the pre-embedded fuel line is then filtered through the refueling unit 2. The filtered fuel is then delivered to the aircraft's refueling port via the movable connecting arm 5 and the folding refueling arm 4, thus completing the refueling process. After refueling is completed, the folding refueling arm 4 is removed from the aircraft's refueling port and folded back onto the elevator body 3 for storage. The elevator body 3 is then driven down to return to the pit body 1. By installing the refueling point close to the aircraft's refueling port, the workload of the operators can be effectively reduced, and the refueling efficiency can be improved to a certain extent.

[0032] Reference Figure 1 and Figure 2 To facilitate the use of the folding refueling arm 4, the lifting body 3 has a connecting platform 20 located below the manhole cover 26. The folding refueling arm 4 is located between the connecting platform 20 and the manhole cover 26. Specifically, the folding refueling arm 4 includes a connecting pipe 41, a bend 42, a folding pipe 43, a connector pipe 44, and a refueling connector 45. The connecting pipe 41 is fixedly installed vertically on the connecting platform 20 of the lifting body 3. The connecting pipe 41 is located on the side of the lifting body 3 near the refueling unit 2, and the lower end of the connecting pipe 41 is used to communicate with the movable connecting arm 5. The bend 42 is connected to the upper end of the connecting pipe 41 through a first rotary joint 7. The rotation axis of the first rotary joint 7 is set vertically, and the bend 42 can rotate 360 ​​degrees along the vertical axis through the setting of the first rotary joint 7.

[0033] Reference Figure 2 and Figure 3 Multiple folded tubes 43 are provided, and the multiple folded tubes 43 are connected sequentially. Adjacent folded tubes 43 are rotatably connected by a second rotary joint 8. The lengths of the multiple folded tubes 43 can be designed to be the same or different as needed. Specifically, each folded tube 43 is Z-shaped. The folded tube 43 at one end is connected to the bend 42 through a third rotary joint 9, and the folded tube 43 at the other end is connected to the connector tube 44 through a fourth rotary joint 10. Further, the rotation axis of the second rotary joint 8 is parallel to the rotation axis of the third rotary joint 9, and the rotation axis of the third rotary joint 9 is perpendicular to the rotation axis of the first rotary joint 7. The rotation axis of the fourth rotary joint 10 is perpendicular to the rotation axis of the first rotary joint 7 and the rotation axis of the second rotary joint 8, respectively. The refueling connector 45 is fixedly connected to the connector tube 44 and is used to connect to the aircraft refueling port.

[0034] Reference Figure 2 and Figure 4 Among them, the first rotary joint 7, the second rotary joint 8, the third rotary joint 9, and the fourth rotary joint 10 all adopt pipe rotary joints with high sealing performance and low rotational damping; at the same time, corrosion-resistant materials are used as the rotary seals of the rotary joints, thereby resisting long-term corrosion by oil. Furthermore, the specific structure and principle of the first rotary joint 7, the second rotary joint 8, the third rotary joint 9, and the fourth rotary joint 10 are all existing technologies and will not be elaborated here.

[0035] When refueling an aircraft, the folding refueling arm 4 is removed from the lift 3, and multiple folding tubes 43 are unfolded in sequence. This allows the arm to be laid flat and extended in a straight line on the apron surface away from the lift 3. The bent tube 42, through the first rotary joint 7, can drive the multiple folding tubes 43 to rotate along the connecting tube 41, thereby changing the horizontal extension direction of the folding refueling arm 4. The connecting tube 44 can rotate to a vertical, horizontal, or tilted position, which is beneficial for connecting the refueling connector 45 to the aircraft's refueling port for refueling. Through the specific design of the folding refueling arm 4, it is possible to quickly connect to the aircraft's refueling port, which improves refueling efficiency to a certain extent. Furthermore, the multiple tubes are less likely to become entangled.

[0036] Reference Figure 4 and Figure 5 A spring 11 is fixedly installed between each adjacent folding tube 43. Specifically, to facilitate the installation of the spring 11, pins are fixed at both ends of each folding tube 43, and the two ends of the spring 11 are respectively fixed to two adjacent pins in the adjacent folding tube 43. When the angle between the adjacent folding tubes 43 is 180°, the spring 11 is in a stretched state. By setting multiple springs 11, the springs 11 can provide assistance when retracting the folding refueling arm 4, reducing the labor intensity of the operators.

[0037] Reference Figure 4 , Figure 5 and Figure 6 Casters 12 are fixedly installed on multiple folded pipes 43 away from the refueling connector 45. Specifically, except for the folded pipe 43 directly connected to the connector pipe 44, casters 12 are fixedly installed on the other folded pipes 43. When the angle between adjacent folded pipes 43 is 180°, the casters 12 on the multiple folded pipes 43 are located at the same end of the corresponding folded pipe 43 and on the side closest to the ground, that is, the multiple folded pipes 43 are facing away from the lifting body 3 (refer to...). Figure 3 When laid flat in the direction of the folding tube 43, the casters 12 are all located on the side closest to the ground.

[0038] Since multiple folding tubes 43 can unfold in a direction away from the lifting body 3, the design of multiple casters 12 can support the multiple folding tubes 43, making it easy to lay the folding tubes 43 flat; at the same time, when the multiple folding tubes 43 are laid on the ground, the casters 12 can prevent the folding tubes 43 from directly contacting the ground, reducing wear during the movement of the folding tubes 43, and making it easier to stretch the folding tubes 43.

[0039] Reference Figure 2 and Figure 7The movable connecting arm 5 is located below the connecting platform 20. To facilitate fuel transfer, the movable connecting arm 5 includes an input pipe 51, a delivery pipe 52, and an output pipe 53. The input pipe 51 is fixedly connected to the refueling unit 2, and the output pipe 53 is fixedly connected to the lower end of the connecting pipe 41. Multiple delivery pipes 52 are provided, and the lengths of the multiple delivery pipes 52 can be designed to be the same or different as needed. The multiple delivery pipes 52 are connected sequentially, and adjacent delivery pipes 52 are rotatably connected through the fifth rotary joint 13, so that adjacent delivery pipes 52 can rotate. The delivery pipe 52 at one end of the multiple delivery pipes 52 is connected to the input pipe 51 through the sixth rotary joint 14, and the delivery pipe 52 at the other end is connected to the output pipe 53 through the seventh rotary joint 15.

[0040] Reference Figure 2 and Figure 7 The rotation axes of the sixth rotary joint 14 and the seventh rotary joint 15 are parallel to each other and perpendicular to the rotation axis of the first rotary joint 7. Furthermore, the rotation axes of the fifth rotary joints 13 between adjacent conveying pipes 52 can be designed to be different, and at least one of the fifth rotary joints 13 has a rotation axis parallel to the rotation axis of the seventh rotary joint 15. The structure and principle of the fifth rotary joint 13, the sixth rotary joint 14, and the seventh rotary joint 15 are the same as those of the first rotary joint 7.

[0041] Since the conveying pipe 52 is connected to the input pipe 51, adjacent conveying pipes 52, and the output pipe 53 by rotary joints, and can be folded and extended in the vertical direction, it can adapt to the up and down lifting of the folding refueling arm 4 and ensure the delivery of fuel.

[0042] Reference Figure 2 and Figure 7 The connecting pipe 41, bend 42, folded pipe 43, connector pipe 44, input pipe 51, delivery pipe 52, and output pipe 53 are all made of rigid pipe. Furthermore, all of these components are made of stainless steel. Because metal pipes have a low coefficient of friction and excellent electrical conductivity, they effectively reduce friction between the oil and the pipeline, decreasing the possibility of static electricity generation and lowering the risk of electrostatic sparks. Using rigid pipes throughout the fuel delivery pipeline helps reduce the possibility of static electricity generation, improving safety. Simultaneously, it ensures the normal operation of refueling operations even in extreme environments.

[0043] Reference Figure 2 and Figure 7A grounding flat iron (not shown in the figure) is pre-embedded in the well pit 1. Copper wires 16 are fixedly connected between the connecting pipe 41 and the bend 42, between the bend 42 and the corresponding folded pipe 43, between adjacent folded pipes 43, between the joint pipe 44 and the corresponding folded pipe 43, between the input pipe 51 and the corresponding delivery pipe 52, between adjacent delivery pipes 52, between the output pipe 53 and the corresponding delivery pipe 52, between the output pipe 53 and the connecting pipe 41, and between the input pipe 51 and the grounding flat iron. By reserving connection points at both ends of the stainless steel pipes and setting up the copper wires 16, an electrical connection mechanism is formed, which helps to ensure that the potential of all stainless steel pipes is consistent at any time, so that all stainless steel pipes are grounded, which facilitates the timely conduction of static electricity generated by oil flow friction, greatly reducing the risk during refueling. The grounding flat iron, as the potential grounding point in the well pit 1, helps to keep the refueling pipeline in a good grounded state and realizes the timely conduction of static electricity generated in the pipeline.

[0044] Reference Figure 2 and Figure 7 Furthermore, the first rotary joint 7, the second rotary joint 8, the third rotary joint 9, the fourth rotary joint 10, the fifth rotary joint 13, the sixth rotary joint 14, and the seventh rotary joint 15 are all connected to the corresponding stainless steel tubes at both ends by copper strips, which helps to ensure good conductivity of all stainless steel tubes.

[0045] Reference Figure 2 and Figure 3 Multiple locking seats 17 are fixedly installed on the lifting body 3, with each locking seat 17 corresponding to a folding tube 43. The locking seats 17 can be elastic and are used to lock and fix the folding tube 43. When the folding tube 43 is locked in the corresponding locking seat 17, the length direction of the folding tube 43 is vertical. Through the design of multiple locking seats 17, the folding refueling arm 4 can be locked on the lifting body 3, making it less likely for the folding refueling arm 4 to fall off when it is retracted.

[0046] Reference Figure 1 and Figure 2 To facilitate operation by workers, the lifting body 3 is equipped with a control panel (not shown in the figure). The refueling unit 2 is electrically connected to the control panel to facilitate refueling operations. Furthermore, to facilitate fuel filtration, the refueling unit 2 includes a filter, a booster pump, and a flow meter. A pre-embedded fuel pipe, filter, booster pump, and movable connecting arm 5 are connected sequentially. The filter is used to filter the fuel, the booster pump is used to increase the fuel pressure, and the flow meter is installed on the pipe between the booster pump and the movable connecting arm 5 to measure the fuel flow rate. The filter, booster pump, and flow meter are all electrically connected to the control panel. In other embodiments, the refueling unit 2 may only use a filter and control valve.

[0047] Reference Figure 1 and Figure 8 To facilitate the sliding effect of the lifting body 3, coaxial linear guide rails (not shown in the figure) are provided on opposite sides of the bracket 21. The lifting body 3 is slidably sleeved on the two linear guide rails of the bracket 21, which facilitates the linear lifting and lowering movement of the lifting body 3 and helps to improve the smoothness of lifting.

[0048] Reference Figure 1 , Figure 8 and Figure 9 To facilitate the lifting of the lifting body 3, the lifting mechanism 6 includes a counterweight 61, a guide wheel 62, and a steel cable 63. The counterweight 61 corresponds one-to-one with the support 21, and the lifting body 3 is located between the two counterweights 61. The counterweights 61 are slidably mounted on the corresponding support 21 in the vertical direction. The steel cable 63 corresponds one-to-one with the counterweights 61, with one end of the steel cable 63 fixed to the corresponding counterweight 61 and the other end fixed to the lower end of the lifting body 3. The guide wheel 62 corresponds one-to-one with the support 21 and is mounted on the corresponding support 21. The steel cable 63 between the counterweights 61 and the lifting body 3 is slidably overlapped on the guide wheel 62 on the corresponding side. The sum of the weights of the two counterweights 61 is greater than the sum of the weights of the lifting body 3, the folding refueling arm 4, and the manhole cover 26. The counterweights 61 are used to lift the lifting body 3 to the outside of the manhole pit 1. The manhole cover 26 is provided with a first locking mechanism 22 for locking or unlocking relative to the manhole pit 1.

[0049] When refueling is needed, the locking mechanism 22 releases the lock between the manhole cover 26 and the pit 1. At this time, under the gravity of the counterweight 61, the steel cable 63 pulls the lifting body 3, which in turn moves the folding refueling arm 4 out of the pit 1, making refueling convenient. When refueling is complete, the manhole cover 26 is manually pressed to lower the lifting body 3 back into the pit 1. The lifting body 3 will then pull the counterweight 61 upward via the steel cable 63. Then, the first locking mechanism 22 locks the manhole cover 26 and the pit 1, thereby closing the pit 1, reducing the difficulty of operation for the operator, and improving work efficiency.

[0050] Reference Figure 1 and Figure 9 Furthermore, the first locking mechanism 22 can be a mechanical lock similar to a door lock structure. Unlocking is achieved by moving the bolt through a key or by manually pulling the mechanical lock lever. The bolt's contact with the manhole body 1 locks the manhole cover 26, restricting its upward movement. Specifically, the principle and structure of the first locking mechanism 22 in the field of lifting manholes are existing technologies and will not be elaborated upon here.

[0051] Reference Figure 1 and Figure 9The manhole 1 is fitted with a manhole ring 18, the upper surface of which is flush with the apron floor. The manhole ring 18 has an opening 19 for the elevator body 3 to move out or in. The manhole cover 26 is used to close or open the opening 19 of the manhole ring 18. When the manhole cover 26 closes the manhole ring 18, the upper surface of the manhole cover 26 is flush with the apron floor. The manhole cover 26 is made of 6061-T6 aluminum alloy, which has good mechanical properties and corrosion resistance. Its pressure resistance reaches the F900 level, and the manhole cover 26 can withstand a pressure of 90 tons, meeting the requirements for aircraft passage.

[0052] Reference Figure 1 and Figure 9 The cross-section of the bottom wall of the connecting platform 20 is larger than that of the opening 19. The connecting platform 20 is used to abut against the bottom wall of the well ring 18, thereby automatically limiting the lifting height of the lifting body 3. A second locking mechanism 23 is designed on the connecting platform 20. The second locking mechanism 23 on the connecting platform 20 also adopts a mechanical lock. When the connecting platform 20 abuts against the bottom wall of the well ring 18, the locking tongue of the second locking mechanism 23 on the connecting platform 20 abuts against the upper surface of the well ring 18, limiting the position of the lifting body 3, so that the lifting body 3 will not move downward under the action of external force. After the refueling is completed, the locking tongue of the second locking mechanism 23 on the connecting platform 20 is manually released from the well ring 18, so that the lifting body 3 can be lowered under the pressure of external force. The lifting height of the lifting body 3 is designed to be at a reasonable level as needed, so that the operator can easily take out and retract the folding refueling arm 4, and also make it convenient for the operator to control the refueling amount, refueling speed, etc. on the control panel. The second locking mechanism 23 is existing technology and will not be described in detail here.

[0053] The implementation principle of Embodiment 1 of this application is as follows: When the refueling platform is not in use, the refueling equipment such as the lifting body 3 and the folding refueling arm 4 are all located in the pit body 1, and the manhole cover 26 seals the pit body 1, so as not to occupy additional apron space and help reduce the possibility of interference between the refueling platform and other airport equipment.

[0054] When refueling a stationary aircraft at the airport is required, the first locking mechanism 22 is manually operated to release the lock on the manhole cover 26. Then, under the gravity of the counterweight 61, the counterweight 61 pulls the lifting body 3 via the steel cable 63, causing the folding refueling arm 4 to move out of the pit body 1. At this time, the multiple delivery pipes 52 of the movable connecting arm 5 can change their posture to adapt to the position of the folding refueling arm 4 until the connecting platform 20 abuts against the bottom wall of the manhole ring 18. The locking tongue of the second locking mechanism 23 on the manhole ring 18 locks with the upper surface of the manhole ring 18, thus fixing the position of the lifting body 3. Lock the refueling arm 4; then the operator removes the folding refueling arm 4 from the mounting bracket 17 on the lifting body 3, unfolds multiple folding tubes 43 in sequence, and with the support of multiple casters 12, the folding tubes 43 can be placed horizontally. Then, pull the refueling connector 45 to connect to the aircraft refueling port, then connect the wires of the aircraft shell and the grounding terminal of the well, return to the control panel of the lifting body 3, operate the control panel, and make the fuel filtered by the refueling unit 2 be delivered to the aircraft refueling port through the movable connecting arm 5 and the folding refueling arm 4 to realize refueling.

[0055] After refueling is complete, shut down refueling unit 2, then remove the refueling connector 45 from the aircraft refueling port. With the assistance of spring 11, fold the refueling arm 4 back onto the lifting body 3, so that the multiple folding tubes 43 of the folding refueling arm 4 are respectively engaged with the corresponding brackets 17 to prevent unnecessary movement of the folding refueling arm 4. Then, release the lock between the second locking mechanism 23 on the connecting platform 20 and the well ring 18, manually press the well cover 26 to drive the lifting body 3 down and back into the pit body 1 until the well cover 26 seals the well ring 18. The first locking mechanism 22 at the well cover 26 locks the well cover 26 to the well ring 18 in the pit body 1, completing the entire refueling process. By installing the refueling point closer to the aircraft refueling port, the workload of personnel can be effectively reduced and refueling efficiency can be improved.

[0056] Example 2:

[0057] Reference Figure 10The difference between this embodiment and Embodiment 1 is that connecting rods 24 are rotatably provided on both sides of the folded tube 43 connected to the connector tube 44 and on both sides of the folded tube 43 connected to the bend tube 42. The rotation axis of the connecting rods 24 is perpendicular to the length direction of the corresponding folded tube 43. The rotation between the connecting rods 24 and the corresponding folded tube 43 has a certain frictional force, and a certain external force needs to be applied to rotate, thereby avoiding unnecessary rotation of the connecting rods 24. Furthermore, the hinge point of the connecting rods 24 on the corresponding folded tube 43 is close to the caster 12 on the corresponding folded tube 43. When multiple folded tubes 43 are folded and installed on the card holder 17, the hinge positions of the connecting rods 24 on the two folded tubes 43 are aligned. Threaded cylinders 25 are threadedly sleeved on the two connecting rods 24 on one folded tube 43, and external thread sections 27 for threaded engagement with the threaded cylinders 25 are provided on the two connecting rods 24 on the other folded tube 43.

[0058] The implementation principle of Embodiment 2 of this application is as follows: When the folding refueling arm 4 is folded into a plane, the connecting rods 24 on the two folding tubes 43 are rotated so that the two connecting rods 24 on the same side are on the same straight line. Then, the threaded cylinder 25 is rotated so that the threaded cylinder 25 engages with the external thread section 27, thereby connecting the two connecting rods 24 on the same displacement plane. At this time, the rotation between adjacent folding tubes 43 is restricted, which makes it convenient to install the entire folding refueling arm 4 on multiple card seats 17 at the same time or remove it from the card seat 17 of the lifting body 3 at the same time, so that the folding refueling arm 4 is not easy to rotate during the picking and putting process, which provides convenience for the operator. When the folding refueling arm 4 needs to be unfolded or folded, the connecting rod 24 is rotated so that the length direction of the connecting rod 24 is consistent with the length direction of the corresponding folding tube 43, which does not easily affect the unfolding or storage of the folding refueling arm 4.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An aircraft linear refueling platform, characterized in that, include: A pit body (1) is embedded below the apron; A refueling unit (2) is installed inside the well pit (1). The refueling unit (2) is connected to the pre-buried oil pipe below the apron. The refueling unit (2) is used to filter fuel. The lifting body (3) is slidably installed in the pit body (1) in the vertical direction; Folding refueling arm (4), the folding refueling arm (4) is set on the lifting body (3), the folding refueling arm (4) is used to unfold to the aircraft refueling port for refueling or fold on the lifting body (3) for storage; Movable connecting arm (5), one end of which is connected to refueling unit (2) and the other end is connected to folding refueling arm (4), the movable connecting arm (5) is used to deliver fuel; Manhole cover body (26), the manhole cover body (26) is set on the lifting body (3) and is used to seal or open the pit body (1); The lifting mechanism (6) is installed inside the pit body (1) and is used to drive the lifting body (3) to rise and fall.

2. The aircraft linear refueling platform according to claim 1, characterized in that: The folding refueling arm (4) includes a connecting pipe (41), a bend (42), a folding pipe (43), a connector pipe (44), and a refueling connector (45). The connecting pipe (41) is mounted on the lifting body (3). The bend (42) is connected to the connecting pipe (41) via a first rotary joint (7). The rotation axis of the first rotary joint (7) is set vertically. Multiple folding pipes (43) are provided, and the multiple folding pipes (43) are connected sequentially via a second rotary joint (8). One end of the folding pipe (43) is connected to the bend (42) via... The third rotary joint (9) is connected, and the folded tube (43) at the other end is connected to the connector tube (44) through the fourth rotary joint (10). The rotation axis of the second rotary joint (8) is parallel to the rotation axis of the third rotary joint (9), and the rotation axis of the third rotary joint (9) is perpendicular to the rotation axis of the first rotary joint (7). The rotation axis of the fourth rotary joint (10) is perpendicular to the rotation axis of the first rotary joint (7) and the rotation axis of the second rotary joint (8). The refueling connector (45) is connected to the connector tube (44) and is used to connect to the aircraft refueling port.

3. The aircraft linear refueling platform according to claim 2, characterized in that: Each of the adjacent folded tubes (43) is provided with a spring (11). When the angle between the adjacent folded tubes (43) is 180°, the spring (11) is in a stretched state.

4. The aircraft linear refueling platform according to claim 2, characterized in that: Casters (12) are provided on a plurality of folded pipes (43) away from the refueling connector (45). When the angle between adjacent folded pipes (43) is 180°, the casters (12) on the plurality of folded pipes (43) are located at the same end of the corresponding folded pipe (43) and on the side closer to the ground.

5. The aircraft linear refueling platform according to claim 2, characterized in that: The movable connecting arm (5) includes an input pipe (51), a delivery pipe (52), and an output pipe (53). The input pipe (51) is connected to the refueling unit (2), and the output pipe (53) is connected to the connecting pipe (41). Multiple delivery pipes (52) are provided, and the multiple delivery pipes (52) are connected to each other in sequence through a fifth rotary joint (13). One end of the multiple delivery pipes (52) is connected to the input pipe (51) through a sixth rotary joint (14), and the other end of the delivery pipe (52) is connected to the output pipe (53) through a seventh rotary joint (15). The rotation axes of the fifth rotary joint (13), the sixth rotary joint (14), and the seventh rotary joint (15) are parallel to each other and perpendicular to the rotation axis of the first rotary joint (7).

6. The aircraft linear refueling platform according to claim 5, characterized in that: The connecting pipe (41), bend pipe (42), folded pipe (43), connector pipe (44), input pipe (51), delivery pipe (52) and output pipe (53) are all made of rigid pipe.

7. The aircraft linear refueling platform according to claim 6, characterized in that: The connecting pipe (41), bend pipe (42), folded pipe (43), joint pipe (44), input pipe (51), conveying pipe (52) and output pipe (53) are all made of stainless steel pipe. A grounding flat iron is installed in the pit body (1). Copper wires (16) are connected between the connecting pipe (41) and the bend pipe (42), between the bend pipe (42) and the corresponding folded pipe (43), between adjacent folded pipes (43), between the joint pipe (44) and the corresponding folded pipe (43), between the input pipe (51) and the corresponding conveying pipe (52), between adjacent conveying pipes (52), between the output pipe (53) and the corresponding conveying pipe (52), between the output pipe (53) and the connecting pipe (41), and between the input pipe (51) and the grounding flat iron.

8. The aircraft linear refueling platform according to claim 7, characterized in that: The first rotary joint (7), the second rotary joint (8), the third rotary joint (9), the fourth rotary joint (10), the fifth rotary joint (13), the sixth rotary joint (14) and the seventh rotary joint (15) are all connected to the corresponding stainless steel pipes at both ends by copper strips.

9. An aircraft linear refueling platform according to claim 2, characterized in that: The lifting body (3) is provided with a card seat (17), which corresponds one-to-one with the folding tube (43). The card seat (17) is used to fix the folding tube (43). When the folding tube (43) is fixed in the corresponding card seat (17), the length direction of the folding tube (43) is vertical.

10. An aircraft linear refueling platform according to any one of claims 2-9, characterized in that: The well pit body (1) is provided with a well ring (18), the well ring (18) has an opening (19) for the lifting body (3) to move out or move in, the well cover body (26) is used to close or open the opening (19) of the well ring (18), the lifting body (3) has a connecting platform (20), the connecting pipe (41) is fixedly installed on the connecting platform (20), the bent pipe (42) is located above the connecting platform (20), the movable connecting arm (5) is located below the connecting platform (20), and the connecting platform (20) is used to abut against the bottom wall of the well ring (18).

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