Top-open type aviation aircraft maintenance oil drainage device

Abstract

The utility model belongs to the technical field of aircraft maintenance, and provides a top-open type aviation aircraft maintenance oil drainage device which comprises an oil storage tank, a top-open assembly and an attaching assembly, an oil drainage pipe movably penetrates through the oil storage tank, an anti-disengaging ring is arranged at the bottom end of the oil drainage pipe, an oil receiving hopper is arranged at the top end of the oil drainage pipe, and a top shaft is arranged in the oil receiving hopper. A jacking-open assembly is arranged on the inner side of the oil storage tank and used for driving the jacking shaft to move vertically and jacking open an aircraft oil tank discharge valve, and an attaching assembly is arranged at the top of the oil receiving hopper and used for being attached to an oil tank discharge outlet when the discharge valve is in a jacking-open state. According to the oil drainage device, the oil drainage pipe is movably arranged on the oil storage tank through the ejection assembly, the position of the oil drainage pipe can be adjusted in the moving process through cooperation of the transverse shaft, the gear, the rack, the rotating shaft, the worm gear and the worm, most of the oil drainage pipe is contained in the inner side of the oil storage tank, and therefore the occupied space of the oil drainage device in the moving process is reduced; and the operability and the moving convenience are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft maintenance, and more specifically, it is a top-opening aviation aircraft maintenance fuel draining device. Background Art

[0002] The top-opening aviation aircraft maintenance fuel draining device is an important tool for discharging fuel in the aircraft fuel tank during aircraft maintenance. By pushing open the drain valve at the bottom of the fuel tank, the fuel can be smoothly discharged. Its structural form may include components such as a housing, a piston, a sealing ring, a spring, a base, etc. to ensure the smooth progress of the fuel draining process;

[0003] In the Chinese patent with the publication number CN216401812U, a fuel draining device for an aircraft fuel tank is mentioned, which includes a fuel draining rod, a receiving fuel tank, and a one-way check valve arranged at the bottom of the aircraft. A top shaft is arranged at the top end of the fuel draining rod, a threaded rod is detachably installed at the bottom end of the fuel draining rod, a threaded groove is opened on the top surface of the receiving fuel tank, and the threaded rod is threadedly connected with the threaded groove. To free both hands, the threaded rod can be threadedly connected with the receiving fuel tank through the threaded groove. When fuel draining is required, rotate the threaded rod, and the threaded rod drives the fuel draining rod to rise and touches the one-way check valve until the one-way check valve is pushed open to start fuel draining. When the fuel draining is completed, the threaded rod can be rotated in the reverse direction until the top shaft disengages from the one-way check valve.

[0004] However, in the above fuel draining device, since the fuel drain pipe is arranged at the top of the receiving fuel tank, it will occupy a certain longitudinal space, resulting in lower convenience during the movement of the entire device.

[0005] Therefore, those skilled in the art have proposed a top-opening aviation aircraft maintenance fuel draining device to solve the problems raised in the background art. Summary of the Utility Model

[0006] In order to solve the above technical problems, the utility model provides a top-opening aviation aircraft maintenance fuel draining device to solve the problems in the prior art that the fuel drain pipe is arranged at the top of the receiving fuel tank, which will occupy a certain longitudinal space and result in lower convenience during the movement of the entire device.

[0007] A top-opening aviation aircraft maintenance fuel draining device includes:

[0008] A storage fuel tank, through which a fuel drain pipe movably penetrates. An anti-detachment ring is arranged at the bottom end of the fuel drain pipe, a fuel receiving hopper is arranged at the top end of the fuel drain pipe, and a top shaft is arranged inside the fuel receiving hopper;

[0009] A top-opening assembly, which is arranged inside the storage fuel tank and is used to drive the top shaft to move vertically to push open the drain valve of the aircraft fuel tank; and

[0010] A fitting assembly, which is arranged at the top of the fuel receiving hopper and is used to fit with the fuel tank drain port when the drain valve is in the pushed-open state.

[0011] Preferably, a limiting seat is arranged at the top of the fuel storage tank, and it is slidably connected to the oil discharge pipe.

[0012] Preferably, moving wheels are rotatably arranged at the four corners of the bottom of the fuel storage tank, and a pushing handrail is connected to the side of the fuel storage tank.

[0013] Preferably, a connecting rod is circumferentially connected to the bottom end of the outer side of the top shaft, and one end of the connecting rod away from the top shaft is connected to the inner wall of the oil receiving hopper.

[0014] Preferably, the jacking assembly includes a horizontal shaft, a gear, a rack, a rotating shaft, a worm gear and a worm. The horizontal shaft and the rotating shaft are rotatably arranged in the fuel storage tank, and the horizontal shaft and the rotating shaft are arranged in a crosswise dislocation manner. A gear and a turbine are connected to the horizontal shaft. A rack is meshed on one side of the gear, and the rack is installed on the outer wall of the oil discharge pipe. The worm gear is meshed with a worm, and the worm is installed in the middle of the rotating shaft. One end of the rotating shaft passes through the fuel storage tank and is connected with a handle.

[0015] Preferably, the fitting assembly includes a corrugated pipe, a connecting ring, a spring and a guiding telescopic rod. A corrugated pipe is connected to the oil receiving hopper. Connecting rings are connected to the outer sides of the corrugated pipe and the oil receiving hopper. Guiding telescopic rods are circumferentially and equidistantly arranged between the two connecting rings, and springs abutting against the connecting rings are sleeved on the outer sides of the guiding telescopic rods.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The utility model movably arranges an oil discharge pipe on the fuel storage tank through the jacking assembly. By using the cooperation of the horizontal shaft, the gear, the rack, the rotating shaft, the worm gear and the worm, the position of the oil discharge pipe can be adjusted during the movement, so that most of the oil discharge pipe is received inside the fuel storage tank, thereby reducing the occupied space of the oil discharge device during the movement and improving the operability and the convenience of movement.

[0018] 2. The utility model is provided with a fitting assembly above the oil receiving hopper at the top of the oil discharge pipe. By using the cooperation of the corrugated pipe, the connecting ring, the spring and the guiding telescopic rod, when the oil discharge pipe drives the top shaft to move upward to jack open the discharge valve, the corrugated pipe always fits with the discharge port on the fuel tank under the cooperation of the spring and the guiding telescopic rod, so that the fuel discharged from the fuel tank is not easy to leak from the butting joint, ensuring the integrity of the oil discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the front view structural schematic diagram of the utility model;

[0020] Figure 2 is the side sectional structural schematic diagram of the utility model;

[0021] Figure 3 is the top sectional structural schematic diagram of the utility model;

[0022] Figure 4 This is a schematic top view structure of the present utility model.

[0023] In the figure:

[0024] 1. Fuel storage tank; 2. Oil discharge pipe; 3. Anti - detachment ring; 4. Oil receiving hopper; 5. Top shaft; 6. Limit seat; 7. Movable wheel; 8. Push handle; 9. Link rod; 10. Cross shaft; 11. Gear; 12. Rack; 13. Rotating shaft; 14. Worm gear; 15. Worm; 16. Handle; 17. Bellows; 18. Connecting ring; 19. Spring; 20. Guide telescopic rod. Specific embodiments

[0025] The following further describes the embodiments of the present utility model in detail with reference to the drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0026] Example 1:

[0027] As shown in Figure 1 to Figure 4 shown:

[0028] The present utility model provides a top - opening type fuel - draining device for aircraft maintenance, including a fuel storage tank 1, a top - opening assembly and a fitting assembly. An oil discharge pipe 2 penetrates through the fuel storage tank 1 movably. An anti - detachment ring 3 is arranged at the bottom end of the oil discharge pipe 2, and an oil receiving hopper 4 is arranged at the top end of the oil discharge pipe 2. A top shaft 5 is arranged inside the oil receiving hopper 4. A top - opening assembly is arranged inside the fuel storage tank 1, which is used to drive the top shaft 5 to move vertically to open the fuel tank discharge valve of the aircraft. A fitting assembly is arranged at the top of the oil receiving hopper 4, which is used to fit with the fuel tank discharge port when the discharge valve is in the open state.

[0029] Referring to Figure 3 , a limit seat 6 is arranged at the top of the fuel storage tank 1, which is slidably connected with the oil discharge pipe 2.

[0030] The movement trajectory of the oil discharge pipe 2 is limited by the arrangement of the limit seat 6, ensuring that it can move vertically along the limit seat 6 when subjected to external forces, and improving the stability of its movement.

[0031] Referring to Figure 1 , movable wheels 7 are rotatably arranged at the four corners of the bottom of the fuel storage tank 1, and a push handle 8 is connected to the side of the fuel storage tank 1.

[0032] Through the cooperation of the movable wheels 7 and the push handle 8, it is convenient to push the fuel storage tank 1 to the lower part of the fuel discharge port of the aircraft, improving the convenience of its movement and the flexibility of use.

[0033] Referring to Figure 4The bottom end of the outer side of the top shaft 5 is circumferentially connected with a connecting rod 9, and the end of the connecting rod 9 away from the top shaft 5 is connected to the inner wall of the oil receiving hopper 4.

[0034] refer to Figure 2 The top opening assembly includes a transverse axis 10, a gear 11, a rack 12, a rotating shaft 13, a worm wheel 14 and a worm 15. The transverse axis 10 and the rotating shaft 13 are rotatably arranged in the oil storage tank 1. The transverse axis 10 and the rotating shaft 13 are arranged in a cross-staggered manner. The transverse axis 10 is connected to the gear 11 and the turbine. A rack 12 is meshed with one side of the gear 11. The rack 12 is installed on the outer wall of the oil drain pipe 2. The worm wheel 14 is meshed with a worm 15. The worm 15 is installed in the middle of the rotating shaft 13. One end of the rotating shaft 13 passes through the oil storage tank 1 and is connected to a handle 16.

[0035] The maintenance personnel drives the rotating shaft 13 to rotate through the handle 16 from the outside, and the rotation of the rotating shaft 13 drives the worm 15 to rotate. The worm 15 meshes with the worm wheel 14. The meshing force drives the horizontal shaft 10 to rotate. The rotation of the horizontal shaft 10 drives the gear 11 thereon to rotate. The gear 11 rotates and meshes with the rack 12, thereby driving the oil drain pipe 2 to move vertically.

[0036] Embodiment 2:

[0037] As attached Figure 1 To Attachment Figure 4 As shown:

[0038] The utility model provides a top-opening aircraft maintenance oil draining device. Based on the above embodiments, this embodiment also records in detail the specific components of the fitting assembly and the fitting method of the fitting assembly with the oil tank discharge port.

[0039] refer to Figure 1 The fitting component includes a bellows 17, a connecting ring 18, a spring 19 and a guide telescopic rod 20. The oil receiving bucket 4 is connected to the bellows 17. The outer sides of the bellows 17 and the outer sides of the oil receiving bucket 4 are both connected to the connecting ring 18. The guide telescopic rod 20 is equidistantly arranged between the two connecting rings 18 in the circumferential direction. The outer side of the guide telescopic rod 20 is sleeved with a spring 19 that abuts against the connecting ring 18.

[0040] Among them, when the oil drain pipe 2 moves vertically, it will first drive the top end of the bellows 17 to move upward until the bellows 17 contacts the oil discharge port. As the oil drain pipe 2 continues to move upward, on the one hand, it will drive the connecting ring 18 on the oil receiving bucket 4 to squeeze the spring 19, so that the guide telescopic rod 20 and the bellows 17 will shrink adaptively. Under the action of the spring 19, the bellows 17 and the oil discharge port are pressed tightly. On the other hand, the top shaft 5 on the oil receiving bucket 4 will push open the oil discharge valve, so that the fuel is introduced downward into the fuel storage tank 1 through the bellows 17, the oil receiving bucket 4 and the oil drain pipe 2.

[0041] Working principle: The maintenance personnel move the device as a whole to the bottom of the aircraft fuel discharge port through the moving wheel 7 and the push armrest 8, and then turn the handle 16, the handle 16 drives the rotating shaft 13 to rotate, the rotation of the rotating shaft 13 drives the worm 15 to rotate, the worm 15 meshes with the worm wheel 14, the meshing force drives the horizontal axis 10 to rotate, the rotation of the horizontal axis 10 drives the gear 11 thereon to rotate, the gear 11 rotates and meshes with the rack 12, thereby driving the drain pipe 2 to move vertically. When the drain pipe 2 moves vertically, it will first drive the top of the bellows 17 to move upward until the bellows 17 contacts the oil discharge port. As the drain pipe 2 continues to move, the top of the bellows 17 will move upward until the bellows 17 contacts the oil discharge port. Continuing upward, on the one hand, it will drive the connecting ring 18 on the oil receiving bucket 4 to squeeze the spring 19, so that the guide telescopic rod 20 and the bellows 17 will shrink adaptively. Under the action of the spring 19, the bellows 17 is close to the oil discharge port. On the other hand, the top shaft 5 on the oil receiving bucket 4 will open the oil discharge valve, so that the fuel is downwardly introduced into the oil storage tank 1 through the bellows 17, the oil receiving bucket 4 and the oil discharge pipe 2. When the oil is discharged, the handle 16 is rotated in the opposite direction to store most of the oil discharge pipe 2 inside the oil storage tank 1, thereby reducing the space occupied by the oil discharge device during movement and improving operability and convenience of movement.

[0042] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0043] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0044] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0045] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A top-opening fuel draining device for aircraft maintenance, characterized in that include: An oil storage tank (1) is provided with an oil drain pipe (2) movably passing through it, an anti-drop ring (3) is provided at the bottom end of the oil drain pipe (2), an oil receiving hopper (4) is provided at the top end of the oil drain pipe (2), and a top shaft (5) is provided inside the oil receiving hopper (4); A push-opening assembly, which is arranged inside the oil storage tank (1) and is used to drive the push shaft (5) to move vertically to push open the aircraft oil tank discharge valve; and The fitting assembly is arranged on the top of the oil receiving hopper (4) and is used to fit with the discharge port of the oil tank when the discharge valve is in an open state.

2. The top-opening aviation aircraft maintenance fuel draining device according to claim 1, wherein: A limit seat (6) is arranged on the top of the oil storage tank (1) and is slidably connected to the oil drain pipe (2).

3. The top-opening aviation aircraft maintenance fuel draining device according to claim 1, wherein: The four corners at the bottom of the oil storage tank (1) are all rotatably provided with moving wheels (7), and the side of the oil storage tank (1) is connected with a pushing handrail (8).

4. The top-opening aviation aircraft maintenance fuel draining device according to claim 1, characterized in that: The bottom end of the outer side of the top shaft (5) is circumferentially connected with a connecting rod (9), and one end of the connecting rod (9) away from the top shaft (5) is connected to the inner wall of the oil receiving bucket (4).

5. The top-opening aviation aircraft maintenance fuel draining device according to claim 1, wherein: The top opening assembly comprises a transverse shaft (10), a gear (11), a rack (12), a rotating shaft (13), a worm wheel (14) and a worm (15). The transverse shaft (10) and the rotating shaft (13) are rotatably arranged in the oil storage tank (1). The transverse shaft (10) and the rotating shaft (13) are arranged in a cross-staggered manner. The transverse shaft (10) is connected with the gear (11) and the turbine. A rack (12) is meshedly arranged on one side of the gear (11). The rack (12) is installed on the outer wall of the oil drain pipe (2). The worm wheel (14) is meshedly arranged with the worm (15). The worm (15) is installed in the middle of the rotating shaft (13). One end of the rotating shaft (13) passes through the oil storage tank (1) and is connected with a handle (16).

6. The top-opening aviation aircraft maintenance fuel draining device according to claim 1, wherein: The fitting assembly comprises a bellows (17), a connecting ring (18), a spring (19) and a guide telescopic rod (20); the bellows (17) is connected to the oil receiving bucket (4); the outer sides of the bellows (17) and the outer sides of the oil receiving bucket (4) are both connected to the connecting ring (18); the guide telescopic rod (20) is equidistantly arranged between the two connecting rings (18) in the circumferential direction; the outer side of the guide telescopic rod (20) is sleeved with a spring (19) that abuts against the connecting ring (18).

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