A liquid storage cartridge device

Abstract

The application discloses a liquid storage box device, which comprises a liquid storage box upper cover, a liquid storage box, a shaft, a valve assembly and a plug cap assembly. The valve assembly is arranged in the inner cavity of the liquid storage box and is connected with the liquid storage box upper cover through the shaft. The valve assembly is opened relative to the lower end of the center hole of the liquid storage box upper cover under the action of a spring. When the airplane is flying horizontally, the reverse seepage oil flows into the inner cavity of the liquid storage box through the center hole of the liquid storage box upper cover. When the airplane is inverted, the valve assembly is buckled at the lower end of the center hole of the liquid storage box upper cover under the action of gravity and the spring, so that the oil in the liquid storage box is prevented from flowing out. The lower part of the liquid storage box is provided with a liquid drainage interface connected with the inner cavity, and the liquid drainage interface is assembled with the plug cap assembly. The application can prevent the oil from entering the air separation device, thereby prolonging the service life of the inerting system.

Description

Technical Field

[0001] This invention relates to military design, airborne fuel tank inerting systems, and pipeline fluids, specifically to a liquid storage box device. Background Technology

[0002] Currently, the design of airborne fuel tank systems and other systems often involves the arrangement and installation of one-way valves to prevent fuel backflow. However, the sealing performance of the currently designed one-way valves cannot guarantee 100% sealing when there is no pressure, and there is a risk of fuel leakage. The core equipment of the airborne fuel tank inerting system is the air separator. Once the air separator in the airborne fuel tank inerting system is contaminated by fuel, it will lead to performance degradation or even failure and scrapping, affecting the service life of the inerting system. Summary of the Invention

[0003] The purpose of this invention is to provide a liquid storage box device, which is installed in the connecting pipeline between the airborne fuel tank inerting system and the aircraft fuel tank, to prevent fuel from leaking back through a one-way valve into the air separation device of the airborne fuel tank inerting system.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] A liquid storage box device includes a liquid storage box cover, a liquid storage box, a shaft, a valve assembly, and a plug assembly, wherein:

[0006] The reservoir cover is a cylindrical structure with multiple steps. The reservoir cover has a central hole along the axial direction for fuel inflow. The top of the reservoir cover has an external thread for connection with the mounting surface reserved for the airborne fuel tank inerting system pipeline. The lower end of the reservoir cover is a flange structure.

[0007] The liquid storage box is a hollow cylindrical structure. The upper end face of the liquid storage box is a flange structure and is provided with a sealing groove. The liquid storage box cover and the liquid storage box are fastened by screw and nut assembly through the screw holes of the flange structure of the liquid storage box cover, so that the sealing ring is in a compressed state in the sealing groove of the liquid storage box.

[0008] The valve assembly is disposed in the inner cavity of the liquid storage box, and the valve assembly is connected to the upper cover of the liquid storage box via a shaft; the valve assembly opens relative to the lower end of the central hole of the upper cover of the liquid storage box under the action of a spring; when the aircraft is in level flight, the oil that seeps out in the opposite direction flows into the inner cavity of the liquid storage box through the central hole of the upper cover of the liquid storage box; when the aircraft is inverted, under the action of gravity and the spring, the valve assembly is locked at the lower end of the central hole of the upper cover of the liquid storage box to prevent the oil in the liquid storage box from flowing out;

[0009] The lower part of the liquid storage box is provided with a liquid discharge port that connects to the inner cavity. The liquid discharge port is provided with external threads and the lower end face of the liquid discharge port has a conical structure. A plug assembly is installed on the liquid discharge port.

[0010] Furthermore, the bottom of the flange structure of the liquid storage box cover is provided with a boss and mounting holes for shaft mounting.

[0011] Furthermore, the valve assembly consists of a valve pad, a plate, a valve seat, and a spring; wherein, after screws are passed through the valve pad, valve seat, and plate in sequence, they are fixed by nuts to complete the assembly of the valve assembly.

[0012] Furthermore, the valve gasket in the valve assembly is made of rubber and is used to seal the lower end of the central hole in the liquid storage box cover.

[0013] Furthermore, a stepped groove is machined at the lower end of the central hole to fit the end of the screw.

[0014] Furthermore, the end of the plate is sleeved on the shaft, and the spring is a torsion spring, which is sleeved on the shaft, with one end supported on the bottom of the plate and the other end supported on the bottom of the liquid storage box cover.

[0015] Furthermore, the cone angle of the conical structure is 74°.

[0016] Furthermore, the plug assembly includes a flared outer nut, a chain handle, and a chain link; wherein, the outer nut is fitted onto the external thread of the drain port, the chain handle is located outside the outer nut, one end of the chain link is fixed to the upper part of the drain port, and the other end is connected to the chain handle.

[0017] Furthermore, a movable plug with a 74° pyramidal surface is provided inside the outer nut to seal the lower end of the drain port.

[0018] Furthermore, the liquid storage box and the plug assembly are sealed with a conical surface after being tightened by threads.

[0019] Compared with the prior art, the present invention has the following technical features:

[0020] The present invention provides a liquid storage box device in the pipeline at the front end of the one-way valve to store the oil that leaks in the reverse direction. The liquid can be drained periodically to prevent the oil from entering the air separation device, thereby improving the service life of the inerting system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] The following are the labels in the diagram: 1 Liquid tank cover, 2 Sealing ring, 3 Liquid storage tank, 31 Liquid drain port, 4 Shaft, 5 Valve assembly, 51 Valve gasket, 52 Valve seat, 53 Plate, 54 Spring, 6 Plug assembly, 61 Outer nut, 62 Chain handle, 63 Chain link, 64 Movable plug, 7 Screw and nut assembly. Detailed Implementation

[0023] See appendix Figure 1 The present invention provides a liquid storage box device, including a liquid storage box cover 1, a sealing ring 2, a liquid storage box 3, a shaft 4, a valve assembly 5, a plug assembly 6, and a screw and nut assembly 7.

[0024] The reservoir cover 1 is a cylindrical structure with multiple steps. The reservoir cover 1 has a central hole along the axial direction for fuel inflow. The top of the reservoir cover 1 has an external thread for connection with the mounting surface reserved for the airborne fuel tank inerting system pipeline. The lower end of the reservoir cover 1 is a flange structure. At the bottom of the flange structure, there is a boss and mounting hole for the shaft 4.

[0025] The liquid storage box 3 is a hollow cylindrical structure. The upper end face of the liquid storage box 3 is a flange structure and is provided with a sealing groove. The screw and nut assembly 7 is fastened to the liquid storage box cover 1 and the liquid storage box 3 through the screw holes of the flange structure on the liquid storage box cover 1 and the liquid storage box 3, so that the sealing ring 2 is in a compressed state in the sealing groove of the liquid storage box 3, thereby playing a sealing role.

[0026] The valve assembly 5 is disposed in the inner cavity of the liquid storage box 3, and is connected to the liquid storage box cover 1 via a shaft 4. The valve assembly 5 consists of a valve pad 51, a plate 53, a valve seat 52, and a spring 54. The assembly is completed by passing screws through the valve pad 51, valve seat 52, and plate 53 in sequence, and then securing them with nuts. The valve pad 51 is made of rubber and is used to seal the lower end of the central hole of the liquid storage box cover 1. A stepped groove is machined at the lower end of the central hole to accommodate the end of the screw. The end of the plate is fitted onto the shaft 4, and the spring 54 is a torsion spring, fitted onto the shaft 4, with one end supported by the bottom of the plate 53 and the other end supported by the bottom of the liquid storage box cover 1.

[0027] The valve assembly 5 opens at a certain angle relative to the lower end of the central hole of the liquid storage box cover 1 under the action of the spring 54. When the aircraft is in level flight, the oil that seeps out in the opposite direction flows into the inner cavity of the liquid storage box 3 through the central hole of the liquid storage box cover 1. When the aircraft is inverted, under the action of gravity of the valve assembly 5 and the action of the spring 54, the valve assembly 5 closes to the lower end of the central hole of the liquid storage box cover 1 to prevent the oil in the liquid storage box 3 from flowing out.

[0028] The lower part of the liquid storage box 3 is provided with a liquid discharge port 31 that is connected to the inner cavity. The liquid discharge port 31 is provided with external threads, and the lower end face of the liquid discharge port 31 has a conical structure with a cone angle of 74°.

[0029] The plugging cap assembly 6 is mounted on the drain port 31. The plugging cap assembly 6 includes a flared outer nut 61, a chain handle 62, and a chain link 63. The outer nut 61 is mounted on the external thread of the drain port 31. The chain handle 62 is located outside the outer nut 61. One end of the chain link 63 is fixed to the upper part of the drain port 31, and the other end is connected to the chain handle 62. A movable plugging cap 64 with a 74° conical surface is provided inside the outer nut 61 to seal the lower end of the drain port 31. The liquid storage box 3 and the plugging cap assembly 6 achieve a conical seal after being tightened by threads.

[0030] The plug assembly 6 and the liquid storage box 3 are connected by threads, and can be repeatedly tightened and removed. The oil can be drained periodically as needed for maintenance.

[0031] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A liquid storage box device, characterized in that, It includes a liquid reservoir cover (1), a liquid reservoir (3), a shaft (4), a valve assembly (5), and a plug assembly (6), wherein: The liquid storage box cover (1) is a cylindrical structure with multiple steps. The liquid storage box cover (1) has a central hole along the axial direction for the inflow of fuel. The top of the liquid storage box cover (1) has an external thread for connecting with the mounting surface reserved for the airborne fuel tank inerting system pipeline. The lower end of the liquid storage box cover (1) is a flange structure. The liquid storage box (3) is a hollow cylindrical structure. The upper end face of the liquid storage box (3) is a flange structure and is provided with a sealing groove. The screw and nut assembly (7) is used to fasten the liquid storage box cover (1) and the liquid storage box (3) through the screw holes of the flange structure on the liquid storage box cover (1) and the liquid storage box (3), so that the sealing ring (2) is in a compressed state in the sealing groove of the liquid storage box (3). The valve assembly (5) is located in the inner cavity of the liquid storage box (3). The valve assembly (5) is connected to the liquid storage box cover (1) via a shaft (4). The valve assembly (5) opens relative to the lower end of the center hole of the liquid storage box cover (1) under the action of the spring (54). When the aircraft is in level flight, the oil that seeps out in the opposite direction flows into the inner cavity of the liquid storage box (3) through the center hole of the liquid storage box cover (1). When the aircraft is inverted, under the action of gravity of the valve assembly (5) and the action of the spring (54), the valve assembly (5) is locked at the lower end of the center hole of the liquid storage box cover (1) to prevent the oil in the liquid storage box (3) from flowing out. The liquid storage box (3) is provided with a liquid discharge port (31) connected to the inner cavity at the lower part. The liquid discharge port (31) is provided with an external thread and the lower end face of the liquid discharge port (31) has a conical structure. A plugging cap assembly (6) is assembled on the liquid discharge port (31).

2. The liquid storage box device according to claim 1, characterized in that, The bottom of the flange structure of the liquid storage box cover (1) is provided with a boss and mounting holes for the shaft (4).

3. The liquid storage box device according to claim 1, characterized in that, The valve assembly (5) consists of a valve pad (51), a plate (53), a valve seat (52), and a spring (54). The valve assembly is completed by passing screws through the valve pad (51), valve seat (52), and plate (53) in sequence and then fixing them with nuts.

4. The liquid storage box device according to claim 1, characterized in that, The valve pad (51) in the valve assembly (5) is made of rubber and is used to seal the lower end of the center hole of the liquid storage box cover (1).

5. The liquid storage box device according to claim 1, characterized in that, A stepped groove is machined at the lower end of the center hole to fit the end of the screw.

6. The liquid storage box device according to claim 1, characterized in that, The end of the plate is sleeved on the shaft (4), and the spring (54) is a torsion spring. The spring (54) is sleeved on the shaft (4), with one end supported on the bottom of the plate (53) and the other end supported on the bottom of the liquid storage box cover (1).

7. The liquid storage box device according to claim 1, characterized in that, The cone angle of the cone-shaped structure is 74°.

8. The liquid storage box device according to claim 1, characterized in that, The plug assembly (6) includes a flared outer nut (61), a chain handle (62), and a chain link (63); wherein, the outer nut (61) is fitted onto the external thread of the drain port (31), the chain handle (62) is located outside the outer nut (61), one end of the chain link (63) is fixed to the upper part of the drain port (31), and the other end is connected to the chain handle (62).

9. The liquid storage box device according to claim 7, characterized in that, Inside the outer nut (61), there is a movable plug cap (64) with a 74° pyramidal surface, which is used to seal the lower end of the drain port (31).

10. The liquid storage box device according to claim 9, characterized in that, The liquid storage box (3) and the plug assembly (6) are sealed with a conical surface after being tightened by threads.

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