Double-sided bearing irregularly-shaped detachable water tank in fuselage

Abstract

A double-sided bearing irregularly-shaped detachable water tank in a fuselage, comprising a water tank top cover (4), a water tank middle section (5), and a water tank base (25), wherein the water tank top cover (4) and the water tank middle section (5) both have curved surfaces protruding towards the outside of the water tank (3); the inner wall of the water tank middle section (5) is of a frame structure; a water tank skin (18) covers the frame structure; a water tank base (25) assembly is open in the middle. The water tank (3) can be mounted in a cabin, so that the space in the cabin is effectively used; a curved surface structure allows for storage of more water, and because the water tank (3) is of a double-sided bearing structure, that is, the outer surface bears airtight load of an aircraft, the inner surface is in direct contact with liquid, and the water tank directly bears the liquid pressure and the overload, the curved surface structure can better bear pressure; due to a frame covered with a skin structure, the weight of the water tank can be greatly reduced, more water tanks (3) can be placed or the speed of the aircraft is increased; compared with previous water storage bins, the water tank can be conveniently detached, so that the aircraft can also be used for other work.

Description

A double-sided pressure-bearing special-shaped detachable water tank inside the fuselage Technical Field

[0001] The invention belongs to the field of aircraft structure design and relates to a double-sided pressure-bearing special-shaped detachable water tank in a fuselage. Background Art

[0002] Forest fires occur frequently, but air fire alarm forces are weak and mainly rely on helicopters. As for fixed-wing aircraft, with the retirement of the H-5, there are currently no large and medium-sized fixed-wing aircraft used for fire fighting. Firefighting aircraft designed based on the modification of large and medium-sized aircraft can quickly increase my country's air fire alarm forces, but in the process of modification to firefighting aircraft, the aircraft configuration is greatly changed and the cost is high. In addition, a water storage tank is mainly set under the fuselage floor, but the space above the bottom plate in the cabin cannot be used and the water storage is limited. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a double-sided pressure-bearing special-shaped detachable water tank in the fuselage, thereby reducing changes to the aircraft configuration, reducing costs, and increasing the water storage capacity of the aircraft.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A double-sided pressure-bearing special-shaped detachable water tank in a fuselage, comprising a water tank top cover, a water tank middle section and a water tank base;

[0006] The water tank top cover and the middle section of the water tank are both curved surfaces protruding toward the outside of the water tank. The inner wall of the middle section of the water tank is a frame structure, and the outside is covered with a water tank skin. The middle of the water tank base assembly is open.

[0007] Preferably, a plurality of crisscrossing vertical ribs are provided at the bottom of the water tank top cover, and a plurality of top air vents are provided on the vertical ribs.

[0008] Preferably, a top air supply hole and a top water level measurement hole are provided on the water tank top cover.

[0009] Preferably, the water tank top cover, the water tank middle section and the water tank base assembly, as well as the frame structure and the water tank skin are all wet-riveted with rivets.

[0010] Furthermore, the rivet direction is from the outer surface of the water tank to the inner surface of the water tank.

[0011] Preferably, the horizontal structure in the frame structure is a crossbeam, the crossbeam is a Z-shaped structure, and the middle part is inclined downward in the horizontal direction.

[0012] Preferably, an anti-sway baffle is provided in the water tank.

[0013] Preferably, the middle section of the water tank is the four side surfaces of the water tank, wherein the curvature of one side surface is the same as the curvature of the inner wall of the aircraft, and the curvature of the opposite surface of the side surface is lower than that of the other surfaces.

[0014] Preferably, a handle assembly is provided on the outside of the middle section of the water tank.

[0015] Preferably, the water tank base is a rectangular ring structure, the single-side cross-section is an inverted T-shaped structure, the bottom surface of the inverted T-shaped structure is a high-precision plane, and a downward boss is provided on the outer edge of the bottom of the inverted T-shaped structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The water tank designed by the present invention can be installed inside the cabin, effectively utilizing the space inside the cabin. The curved structure can store more water. Since the water tank is a double-sided pressure-bearing structure, that is, the outer surface bears the airtight load of the aircraft, and the inner surface is in direct contact with the liquid and directly bears the pressure and overload of the liquid, the curved structure can better bear the pressure. The frame-covered skin structure can greatly reduce its own weight, increase the number of water tanks placed, and thus increase the water storage capacity. Compared with the water storage tank, the configuration change of the aircraft is small, which reduces the modification cost, and the water tank is easy to disassemble, so that the aircraft can also be used for other work.

[0018] Furthermore, the top vent hole is used to maintain the liquid level balance when the water in the water tank enters the top cover.

[0019] Furthermore, the top air supply hole is used to connect to the air supply overflow pipe, so as to quickly replenish the volume of the water tank and speed up the discharge speed when the water in the water tank is discharged by gravity. The top water level measuring hole is used for installing the water level measuring device in the water tank.

[0020] Furthermore, the water tank is a double-sided pressure-bearing structure, which utilizes the interference fit of rivets combined with wet riveting to prevent water leakage to the greatest extent.

[0021] Furthermore, the rivet direction is from the outer surface of the water tank to the inner surface of the water tank, thereby improving the water tank's ability to withstand pressure and overload.

[0022] Furthermore, the inclination of the crossbeam is conducive to the drainage of liquid in the water tank and ensures that there is no residual liquid in the water tank.

[0023] Furthermore, the anti-sway baffle is used to support the outer shape of the water tank when it is under pressure and to prevent the liquid in the water tank from swaying.

[0024] Furthermore, the curvature of one of the side surfaces is the same as the curvature of the inner wall of the aircraft, which improves space utilization and increases water storage capacity. The relative surface curvature of this side surface is lower than that of the other surfaces and is used to face the aisle, leaving enough space for people to pass through.

[0025] Furthermore, the handle assembly is used for carrying and lifting the water tank, as well as for fine-tuning during installation.

[0026] Furthermore, the boss at the bottom of the water tank base is used for positioning the water tank during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the water tank structure.

[0028] Figure 2 is a schematic diagram of the water tank top cover.

[0029] Figure 3 is a typical schematic diagram a of the water tank wall.

[0030] Figure 4 is a typical schematic diagram b of the water tank wall panel.

[0031] FIG5 is a schematic diagram of a handle assembly.

[0032] Figure 6 is a schematic diagram of the water tank bulkhead.

[0033] Figure 7 is a schematic diagram of the water tank anti-sway component.

[0034] Figure 8 is a schematic diagram of the water tank base.

[0035] Figure 9 is a schematic diagram of the water tank structure installed on the fuselage.

[0036] Among them: 1-fuselage floor, 2-aircraft front cargo door, 3-water tank, 4-water tank top cover, 5-water tank middle section, 6-water tank base assembly, 7-anti-sway baffle, 8-middle section front wall panel, 9-middle section rear wall panel, 10-middle section left wall panel, 11-middle section right wall panel, 12-handle assembly, 13-fine-tuning handle assembly, 14-top air supply hole, 15-top water level measuring hole, 16-top vent, 17-vertical rib, 18-water tank skin, 19-beam, 20-crossbeam, 21-connecting corner box, 22-rivet, 23-handle box, 24-handle, 25-water tank base, 26-base joint, 27-boss, 28-high-precision plane, 29-water tank bottom open, 30-smooth curved surface. Modes for Carrying Out the Invention

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the accompanying drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] As shown in Figure 1, this is the double-sided pressure-bearing special-shaped detachable water tank in the fuselage of the present invention. The water tank 3 is composed of a water tank top cover 4, a water tank middle section 5, a water tank base assembly 6, and an anti-sway assembly 7. At the same time, handle assemblies 12 are provided on the front and rear surfaces of the water tank 3 for carrying and lifting the water tank, and a fine-tuning handle assembly 13 is provided on the side surface facing the aisle for manual fine-tuning when the water tank is installed on the aircraft.

[0041] As shown in FIG1 , the water tank top cover 4 and the water tank middle section 5 of the water tank 3 are composed of curved surfaces with different radians. The curved surfaces protrude toward the outside of the water tank 3 , and the curved surface structure can better bear pressure.

[0042] As shown in FIG. 5 , the handle assembly 12 and the fine-tuning handle assembly 13 are composed of a handle box 21 and a handle 22 .

[0043] As shown in Figure 2, the water tank top cover 4 is an integral machined part, which contains a top air supply hole 14 and a top water level measuring hole 15. The top air supply hole 14 is used to connect to the air supply overflow pipe. Its function is to quickly replenish the volume in the water tank when the water in the water tank 3 is discharged by gravity, thereby accelerating the discharge speed. The top water level measuring hole 15 is used for installing a water level measuring device in the water tank.

[0044] A plurality of crisscrossing vertical ribs 17 are provided at the bottom of the water tank top cover 4, and a plurality of top vent holes 16 are provided on the vertical ribs 17. The top vent holes 16 are used to keep the liquid level in the water tank balanced when the water enters the top cover.

[0045] As shown in Figures 3 and 4, the structure of the middle section 5 of the water tank includes a middle front wall panel 8, a middle rear wall panel 9, a middle left wall panel 10 and a middle right wall panel 11. Each wall panel is wet-riveted with a water tank skin 18, a truss 19, a crossbeam 20 and a connecting corner box 21 by rivets 22. The truss 19 is a vertically arranged arc-shaped bar, and the crossbeam 20 is arranged horizontally. Multiple trusses 19 and crossbeams 20 are staggered to form a frame structure. A connecting corner box 21 is set at the intersecting part. The water tank skin 18 covers the outer arc surface of the frame structure to form a smooth curved surface 30.

[0046] Since the water tank 3 is a double-sided pressure-bearing structure, that is, the outer surface bears the airtight load of the aircraft, while the inner surface is in direct contact with the liquid and directly bears the pressure and overload of the liquid, the riveting direction of the rivet 22 is selected with the pier head inside the water tank 3, so that the direction of the rivet 22 is from the outer surface of the water tank 3 to the inner surface of the water tank 3, and wet riveting is adopted to maximize the interference fit of the rivet 22 to prevent leakage of the liquid in the water tank 3.

[0047] The beam 19 is vertical, connecting the vertical rib 17 on the water tank top cover 4 and the base joint 26 in the water tank base assembly 6. As shown in Figure 6, the crossbeam 20 is a Z-shaped structure, with the middle part tilted 20° downward in the horizontal direction and segmented at the connection with the beam 19. The inclination of the crossbeam 20 is conducive to the discharge of liquid in the water tank 3 and ensures that there is no residual liquid in the water tank 3.

[0048] As shown in Figure 7, the anti-sway baffle 7 is composed of a plurality of parallel perforated plates. Adjacent perforated plates are connected by ribs. Both sides of the perforated plates are fixed on any two opposite wall panels of the middle section 5 of the water tank. They are used to support the external shape of the water tank 3 when it is under pressure and to prevent the liquid in the water tank 3 from swaying.

[0049] As shown in Figure 8, the water tank base assembly 6 is composed of a water tank base 25 and a base joint 26. The water tank base 25 is a rectangular ring structure with a single-sided cross-section of an inverted T-shaped structure. The bottom surface of the inverted T-shaped structure is a high-precision plane 28, which is used to connect with the fuselage floor surface 1. A downward boss 27 is provided on the outer edge of the bottom of the inverted T-shaped structure for positioning the water tank 3. The middle of the water tank base 25 is an opening 29 for the water tank bottom, which is used to communicate with the discharge channel provided between the fuselage floor surface and the lower fuselage skin.

[0050] As shown in FIG9 , when the water tanks 3 are used, the four water tanks 3 of a single aircraft are carried into the interior of the aircraft through the front cargo door 2 of the aircraft, and fixed above the drainage channel provided between the aircraft cabin floor 1 and the lower skin of the fuselage. The top of the water tank 3 is connected to the side wall of the fuselage through an air supply overflow pipe.

[0051] The water tank 3 has an irregular structure. Due to the cabin aisle requirements, the curvature of one side of the water tank 3 is smaller than that of the other sides, and is close to a straight surface. This side is set towards the aisle, so that there is enough space for people to pass between the two water tanks 3. The relative surface curvature of this side is the same as the curvature of the inner wall of the aircraft, which improves the utilization of space.

[0052] The water tank 3 is filled through the filling pipe set on the side wall of the fuselage. After the filling is completed, the water in the water tank 3 is discharged out of the machine through the drainage channel. At this time, air enters the water tank 3 through the air supply overflow pipe, realizing the volume filling after the liquid in the water tank 3 is quickly discharged.

[0053] During configuration conversion, personnel remove the connecting bolts between the water tank 3 and the drainage channel, and then use the handle assembly 12 provided on the water tank 3 to carry the water tank 3 to the outside of the fuselage in sequence.

[0054] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0055] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this patent should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of completeness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A double-sided pressure-bearing special-shaped detachable water tank in a fuselage, characterized in that: It comprises a water tank top cover (4), a water tank middle section (5) and a water tank base (25); The water tank top cover (4) and the water tank middle section (5) are both curved surfaces protruding toward the outside of the water tank (3); the inner wall of the water tank middle section (5) is a frame structure, and the outside is covered with a water tank skin (18); the water tank base assembly (6) is open in the middle.

2. The double-sided pressure-bearing special-shaped detachable water tank in the fuselage according to claim 1, characterized in that: A plurality of crisscross vertical ribs (17) are arranged at the bottom of the water tank top cover (4), and a plurality of top vent holes (16) are arranged on the vertical ribs (17).

3. The double-sided pressure-bearing special-shaped detachable water tank in the fuselage according to claim 1, characterized in that: A top air supply hole (14) and a top water level measurement hole (15) are provided on the water tank top cover (4).

4. The double-sided pressure-bearing special-shaped detachable water tank in the fuselage according to claim 1, characterized in that: The water tank top cover (4), the water tank middle section (5) and the water tank base assembly (6), as well as the frame structure and the water tank skin (18) are all wet-riveted by rivets (22).

5. The double-sided pressure-bearing special-shaped detachable water tank in the fuselage according to claim 4, characterized in that: The direction of the rivet (22) is from the outer surface of the water tank (3) to the inner surface of the water tank (3).

6. The double-sided pressure-bearing special-shaped detachable water tank in the fuselage according to claim 1, characterized in that: The horizontal structure in the frame structure is a crossbeam (20), and the crossbeam (20) is a Z-shaped structure, with the middle portion tilted downward in the horizontal direction.

7. The double-sided pressure-bearing special-shaped detachable water tank in the fuselage according to claim 1, characterized in that: An anti-sway baffle (7) is arranged in the water tank (3).

8. The double-sided pressure-bearing special-shaped detachable water tank in the fuselage according to claim 1, characterized in that: The middle section (5) of the water tank is the four side surfaces of the water tank (3), one of which has a curvature that is the same as the curvature of the inner wall of the aircraft, and the curvature of the opposite surface of the side is lower than that of the remaining surfaces.

9. The double-sided pressure-bearing special-shaped detachable water tank in the fuselage according to claim 1, characterized in that: A handle assembly (12) is arranged outside the middle section (5) of the water tank.

10. The double-sided pressure-bearing special-shaped detachable water tank in the fuselage according to claim 1, characterized in that: The water tank base (25) is a rectangular ring structure, and the single-side cross section is an inverted T-shaped structure. The bottom surface of the inverted T-shaped structure is a high-precision plane (28), and a downward boss (27) is arranged on the outer edge of the bottom of the inverted T-shaped structure.

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