Ground test device for aircraft water delivery task system

Abstract

The invention discloses an aircraft water throwing task system ground test device which comprises a simulation water tank, the simulation water tank is located above a water throwing pool, and the simulation water tank is fixed to a supporting rack so that the distance between the bottom of the simulation water tank and the bottom of the water throwing pool can meet the requirement; the top of the simulation water tank is provided with a water tank water injection connector, a water pressure simulation connector and a water tank overflow port, the water tank overflow port is provided with a sealing cover plate, and the bottom of the simulation water tank is provided with a water throwing cabin door. The device is high in comprehensiveness, flexible in design and convenient to implement, and has high popularization value in ground verification tests of large fire extinguishing aircrafts in the aviation industry.

Description

Technical Field

[0001] The invention belongs to the technical field of ground testing of aviation fire extinguishing equipment, and in particular relates to a ground testing device for an aircraft water dropping mission system. Background Art

[0002] When various aircraft with fire-fighting functions conduct simulation verification tests on the ground, they all need to verify the structural form, sealing of the water tank hatch door and the functional performance of the fire-fighting mission system. At present, there is no test verification test bench for large-scale water-dropping mission systems in China, and the existing test benches only use the form of simulated hatch door installation to verify the hatch door structure alone, or use dummy parts to simulate the structural installation of the water-dropping mission system to verify the functional performance of the water-dropping mission system alone. It does not have the ability to conduct comprehensive verification of multiple systems and multiple tasks, and does not have the ability to test and verify the hatch door structure and sealing under various water-loading conditions of the real water tank. It does not have the system-level comprehensive verification capability of the on-board fire-fighting mission system control logic, actuators, and water tank structure under the overload state after simulating real water loading, water-dropping in different cabins, and system failure conditions. Summary of the invention

[0003] Purpose of the Invention

[0004] In order to solve the above technical problems, the present invention provides a ground test device for an aircraft water dropping mission system.

[0005] Inventing technical solutions

[0006] A ground test device for an aircraft water dropping mission system comprises a simulated water tank, which is located above a water dropping pool. The simulated water tank is fixed on a supporting stand so that the distance between the bottom of the simulated water tank and the bottom of the water dropping pool meets the requirements; a water tank filling connection port, a water pressure simulation connection interface, and a water tank overflow port are arranged on the top of the simulated water tank, a sealing cover plate is arranged at the water tank overflow port, and a water dropping hatch is arranged at the bottom of the simulated water tank.

[0007] Preferably, the main body of the simulated water tank is designed with reference to the real water tank structure on the aircraft, the internal main frame structure and the water-dropping hatch structure are 1:1 simulated of the water tank mechanism on the aircraft, and the side walls and the top are simplified by thin steel plates.

[0008] Preferably, the side walls and top of the simulated water tank have structural reinforcement ribs.

[0009] Preferably, a water tank filling connection port is provided on the top surface of each compartment of the simulated water tank.

[0010] Preferably, a vertically arranged water pressure simulation tube is connected to one of the water tank water filling connections.

[0011] Preferably, a water level regulating device is connected to the pipeline connected to the water filling connection port of the water tank, and the water level regulating device includes a stop valve, and the water in the water pressure simulation tube can be released by opening the stop valve.

[0012] Preferably, a water tank leveling mechanism is also provided on the support frame, and the water tank leveling mechanism is located on both sides of the simulated water tank. The water tank leveling mechanism includes a rotating nut, a leveling stud, two supporting columns, and a supporting cross bar. The supporting cross bar is connected to the top surfaces of the two supporting columns, and an adjusting plate is fixed to the bottom surfaces of the two supporting columns. A water tank leveling mechanism mounting seat is fixed on the support frame, and the water tank leveling mechanism mounting seat is arranged below the adjusting plate. The rotating nut is connected to the leveling stud, and the leveling stud is threadedly connected to the water tank leveling mechanism mounting seat. When the leveling stud is rotated, the top surface of the leveling stud can lift up the adjusting plate. After adjustment into place, the adjusting plate is connected to the water tank leveling mechanism mounting seat.

[0013] Preferably, a plurality of lifting ears are fixed on the side wall of the simulated water tank.

[0014] Preferably, the water pressure simulation tube is made of PVC material.

[0015] Preferably, it also includes a water injection system, which includes a water injection pipe and a stop valve. The water injection pipe is connected to the water tank water injection connection interface, and the stop valve is arranged on each water injection pipe.

[0016] Advantages of the present invention: The present invention effectively solves the rapid water filling and drainage functions of the water tank's repeated water-dropping function verification, and can realize the system-level comprehensive verification capabilities of the water pressure overload under the actual water load of the water tank, water-dropping with different water loads, and the control logic of the on-board water-dropping task system, the form of the actuator, and the water tank structure under the system failure state. It has a convenient and fast auxiliary platform, which makes the entire test platform have good accessibility, and is convenient for nearby observation of the test system and the water-dropping effect inside the water tank during the test. The test platform is highly comprehensive, flexible in design, and easy to implement. It has a high popularization value in the ground verification test of large fire-fighting aircraft in the aviation industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the ground test device for the aircraft water-dropping mission system.

[0018] Figure 2 (a) and (b) are schematic diagrams of the simulated water tank structure.

[0019] Figure 3 (a) and (b) are schematic diagrams of the support stand water tank installation.

[0020] Figure 4 This is a schematic diagram of the water tank water pressure simulation structure.

[0021] Figure 5 It is a schematic diagram of the water tank filling system.

[0022] In the figure, 1 is a simulated water tank, 2 is a support frame, 3 is a water pressure simulation device, 4 is a water injection system, 5 is an auxiliary platform, 6 is a test water dropping task system, 7 is a water dropping pool, 1-1 is a simulated water tank body, 1-2 is a water injection connection interface, 1-3 is a water pressure simulation connection interface, 1-4 is a structural reinforcement rib, 1-5 is an overflow port and a sealing cover plate, 1-6 is a lifting lug, 1-7 is a water dropping hatch, 1-8 is a water tank bottom installation angle piece, 2-1 is a support frame main frame, 2-2 is a water tank inlet and outlet connection beam, 2-3 is a water tank leveling mechanism, 2-4 is a bottom connection structure, 2-5 is a side connection structure, 2-6 is a locking nut, 2-7 is a leveling stud, 3-1 is a connection flange, 3-2 is a water column height adjustment device, 3-3 is a water pressure simulation pipe, 4-1 is a water injection pipe, and 4-2 is a channel stop valve. DETAILED DESCRIPTION

[0023] The present invention is achieved through the following technical solutions.

[0024] A ground test device for an aircraft water-dropping mission system comprises a simulated water tank 1, a support stand 2, a water pressure simulation device 3, a water injection system 4, an auxiliary platform 5, a tested fire-fighting mission system 6 and a water-dropping pool 7.

[0025] like Figure 2 As shown in (a), the simulated water tank 1 includes a simulated water tank body 1-1. The simulated water tank body 1-1 is designed with reference to the real water tank structure on the aircraft. The main frame structure and the hatch structure inside simulate the water tank mechanism on the aircraft in a 1:1 ratio. The side walls and top of the water tank are simplified by thin steel plates, which mainly provide the installation structure support of the water hatch and provide the water tank volume required by the test. After the water tank is simplified, considering the strength of the overall structure of the water tank, it is necessary to design a number of structural reinforcement ribs 1-4 on the side walls and top of the simulated water tank 1. The structural reinforcement ribs 1-4 are made of different types of angle steel and can also be used for the structural connection between the simulated water tank 1 and the support stand 2. A number of water tank water injection connection ports 1-2 for facilitating water injection of each compartment and a water pressure simulation connection interface 1-3 for connecting the water pressure simulation device 3 are arranged in different compartments on the top of the simulated water tank body 1-1. The water pressure simulation connection interface 1-3 for connecting the water pressure simulation device 3 is welded to the top of the water tank using a round pipe with a diameter of 60 mm. Water tank overflow ports and sealing covers 1-5 are also provided on the tops of different compartments, which can simulate the overflow port blocking water injection test under different cross-sectional areas, verify the structure and watertight performance of the water injection hatch, and can also be used as a channel for installation and maintenance in and out of the water tank and an observation port for the internal state of the water tank. The side wall of the water tank is also provided with 4 lifting ears 1-6 for convenient overall lifting of the water tank.

[0026] like Figure 2The bottom of the simulated water tank 1 completely simulates the bottom structure design of a fire-fighting aircraft, and the simulated water tank's water-dropping hatch 1-7 is installed with reference to the actual water-dropping hatch structure on the aircraft. In the area where the bottom structure of the simulated water tank body 1-1 is relatively strong, and in the appropriate position that does not affect the retraction and extension of the hatch, a plurality of water tank bottom installation angle pieces 1-8 are riveted, which can provide a reliable bottom connection form for the simulated water tank 1 and the support stand 2.

[0027] The support stand 2 includes a support stand main frame 2-1, which is welded from standard steel and is mainly used to install the simulated water tank 1, and to keep the lower part of the simulated water tank 1 at a sufficient height to realize the water throwing function, so as to prevent the splashing of water during water throwing from affecting the water throwing effect. The support stand 2 has a water tank leveling mechanism 2-3, and the position leveling of the simulated water tank 1 when installed on the support stand 2 is realized through the water tank leveling mechanism 2-3. In this embodiment, the support stand main frame 2-1 is mainly welded from 200mm×200mm square steel and is divided into a two-layer structure, which mainly provides a reliable support and installation structure for the simulated water tank 1. The upper part of the second-layer stand is detachably connected with a water tank inlet and outlet connecting beam 2-2 for convenient water tank installation, which adopts a flange screw connection form. When the simulated water tank 1 needs to be hoisted onto the support stand 2 as a whole, the connecting bolts of the water tank inlet and outlet connecting beam 2-2 can be loosened to remove the water tank inlet and outlet connecting beam 2-2. Then, the water tank is hoisted as a whole through the lifting lugs 1-6 on the simulated water tank 1, and the structural reinforcement ribs 1-4 on the side of the simulated water tank are placed on the water tank leveling mechanism 2-3 on the stand. The extension length of the leveling studs 2-7 is adjusted by rotating the rotating nut 2-6 to adjust the position of the water tank. When the water tank is leveled to the required position as a whole, the simulated water tank 1 is reliably connected to the support stand 2 through the bottom connection structure 2-4 and the side connection structure 2-5 welded on the support stand main frame 2-1 by screw connection. Finally, the connection of the water tank inlet and outlet connection beam 2-2 on the support stand main frame 2-1 is restored. In order to ensure that there is enough water throwing space under the simulated water tank, the height of the bottom of the simulated water tank from the bottom of the water throwing pool 7 is generally not less than 2m.

[0028] The water pressure simulation device 3 uses a simulated water column to simulate the pressure of the water tank 1 filled with water under an overload state of 2.5g. A water column height regulating valve is provided at the bottom of the device to realize the water pressure simulation of water columns of different heights. In this embodiment, a steel pipe with an inner diameter of 12mm and a stop valve are welded at the bottom of the water tank water injection connection port 1-2 as a water level regulating device 3-2. When it is necessary to adjust the overload water pressure of the water tank, the water level of the water pressure simulation pipe 3-3 can be adjusted by opening the stop valve to release the water. A flange 3-1 is welded to the top of the water tank water injection connection port 1-2, and a water pressure simulation pipe 3-3 with a height of not less than 5m is connected through the flange 3-1. The water pressure simulation pipe 3-3 is made of transparent PVC material, and a height mark is set on the outside to facilitate the observation of the simulated water level height.

[0029] In order to realize multiple rounds of repeated water-dropping tests on the ground of the water-dropping task system, the present invention is provided with a quick and convenient water-filling system 4. The water-filling system 4 is mainly composed of a water-filling pipe 4-1 and a channel stop valve 4-2. The water-filling pipe 4-1 adopts a PVC pipe with an inner diameter of not less than 50 mm, and connects various water tanks through the water tank water-filling connection interface 1-2 on the simulated water tank 1. The stop valve 4-2 of each channel is set at a position convenient for operation from the ground, which can realize simultaneous water-filling of different water tanks and water-filling of compartments, and adopts a large-flow pipeline channel, so that when using ground fire-fighting water, the full-load water-filling time of a 12-ton water tank can be achieved within 20 minutes.

[0030] Because the support frame is at a high height from the ground, a convenient and fast auxiliary platform is set up to facilitate the test personnel to quickly approach the tested water-dropping task system on the top of the water tank and observe the water-dropping effect inside the water tank through the overflow port on the top of the water tank.

[0031] The tested water-dropping mission system is installed according to the composition of the onboard water-dropping mission system. The external system of the water tank is constructed with reference to the onboard system to ensure the same installation and connection form as onboard. It is installed on the top of the test bench through a simple support or bracket. The internal system of the water tank simulates the internal installation of the onboard water tank at a 1:1 ratio and is installed through a simulated internal bracket of the water tank. The tested water-dropping mission system can be easily pressurized through the ground hydraulic source to realize the driving of the water-dropping hatch.

[0032] Taking into account the impact of large amounts of water on the test site environment, a water pool is designed to receive the water, and a sinking pit and a sinking pump are set at the bottom of the water pool to quickly discharge the liquid in the pool into the surrounding drainage channel.

[0033] The protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope of the present invention. If these changes and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these changes and modifications.

Claims

1. A ground test device for an aircraft water-dropping mission system, characterized in that: The device comprises a simulated water tank (1), wherein the simulated water tank (1) is located above a water-dropping pool (7), and the simulated water tank (1) is fixed on a support frame (2) so that the distance between the bottom of the simulated water tank (1) and the bottom of the water-dropping pool (7) meets the requirements; a water tank water filling connection port (1-2), a water pressure simulation connection interface (1-3), and a water tank overflow port are arranged at the top of the simulated water tank (1); a sealing cover plate is arranged at the water tank overflow port, and a water-dropping hatch (1-7) is arranged at the bottom of the simulated water tank (1).

2. The aircraft water dropping mission system ground test device according to claim 1, characterized in that: The main body of the simulated water tank 1 is designed with reference to the real water tank structure on the aircraft. The main internal frame structure and the water-dropping hatch (1-7) structure simulate the water tank mechanism on the aircraft in a 1:1 ratio. The side walls and top are simplified by thin steel plates.

3. The aircraft water dropping mission system ground test device according to claim 2, characterized in that: The simulated water tank (1) has structural reinforcement ribs (1-4) on the side walls and the top.

4. The aircraft water dropping mission system ground test device according to claim 1, characterized in that: The top surface of each compartment of the simulated water tank (1) is provided with a water tank filling connection port (1-2).

5. The aircraft water dropping mission system ground test device according to claim 4, characterized in that: A vertically arranged water pressure simulation pipe (3-3) is connected to one of the water tank water filling connection ports (1-2).

6. The aircraft water dropping mission system ground test device according to claim 5, characterized in that: A water level regulating device (3-2) is connected to the pipeline connected to the water tank water filling connection port (1-2), and the water level regulating device (3-2) comprises a stop valve, and the water in the water pressure simulation tube (3-3) can be released by opening the stop valve.

7. The aircraft water dropping mission system ground test device according to claim 3, characterized in that: A water tank leveling mechanism (2-3) is also arranged on the support frame (2). The water tank leveling mechanism (2-3) is located on both sides of the simulated water tank (1). The water tank leveling mechanism (2-3) comprises a rotating nut (2-6), a leveling stud (2-7), two supporting columns, and a supporting crossbar. The supporting crossbar is connected to the top surfaces of the two supporting columns. An adjustment plate is fixed to the bottom surfaces of the two supporting columns. A water tank leveling mechanism mounting seat is fixed on the support frame (2). The water tank leveling mechanism mounting seat is arranged below the adjustment plate. The rotating nut (2-6) is connected to the leveling stud (2-7). The leveling stud (2-7) is threadedly connected to the water tank leveling mechanism mounting seat. When the leveling stud (2-7) is rotated, the top surface of the leveling stud (2-7) can lift up the adjustment plate. After the adjustment is in place, the adjustment plate is connected to the water tank leveling mechanism mounting seat.

8. The aircraft water dropping mission system ground test device according to claim 1, characterized in that: A plurality of lifting ears (1-6) are also fixed on the side wall of the simulated water tank (1).

9. The aircraft water dropping mission system ground test device according to claim 6, characterized in that: The water pressure simulation pipe (3-3) is made of PVC material.

10. The aircraft water dropping mission system ground test device according to claim 1, characterized in that: It also includes a water injection system (4), which includes a water injection pipe (4-1) and a stop valve (4-2). The water injection pipe (4-1) is connected to the water tank water injection connection interface (1-2), and the stop valve (4-2) is arranged on each water injection pipe (4-1).

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