A fluid distribution control valve

Abstract

The present application belongs to the emergency system of the aircraft cabin, and particularly relates to a fluid distribution control valve. It comprises a shell; the shell is cylindrical as a whole, and has an inner cavity, and a first nozzle, a second nozzle, a third nozzle, a fourth nozzle and an emergency discharge hole connected to the inner cavity, the first nozzle is located at the front end surface of the shell, the second nozzle, the third nozzle, the fourth nozzle and the emergency discharge hole are located on the side of the shell, and the second nozzle is located; a piston, the piston is installed in the inner cavity, and the piston has the freedom of axial translation in the inner cavity; a plug cover, the plug cover blocks the rear end of the shell; the present application can realize the cross-linking of the normal opening and closing of the canopy and the emergency jettisoning of the canopy, which can realize the closing of the canopy under normal circumstances, and the emergency jettisoning of the canopy under emergency circumstances.

Description

Technical Field

[0001] The present application relates to an emergency system for an aircraft cabin, and in particular to a fluid distribution control valve. Background Art

[0002] In the past, the normal opening and closing of the canopy and the emergency jettisoning of the canopy were two independent systems. The two independent systems made the gas circuit connection complicated and difficult to maintain. In actual use, the complex gas circuit would take up extra space and weight. The existing technology lacked a simple valve to realize daily work, and could replace the emergency gas circuit in special emergency environments to ensure the normal use of the aircraft air cabin. Summary of the invention

[0003] In order to solve the above problems, the present application provides a fluid distribution control valve, comprising:

[0004] Shell; The shell is cylindrical as a whole, and has an inner cavity, and a first nozzle, a second nozzle, a third nozzle, a fourth nozzle and an emergency discharge hole connected to the inner cavity, the first nozzle is located at the front end surface of the shell, the second nozzle, the third nozzle, the fourth nozzle and the emergency discharge hole are located on the side of the shell, and the second nozzle is located;

[0005] A piston is mounted in the inner cavity, and has axial translation freedom in the inner cavity;

[0006] A plugging cover, which seals the rear end of the shell;

[0007] The third nozzle, the fourth nozzle and the emergency discharge hole all have an axial spacing, and the third nozzle is located between the fourth nozzle and the emergency discharge hole;

[0008] The piston has two extreme positions along the axis in the inner cavity, namely, an emergency position and a working position. When the piston is in the working position, the piston contacts the first nozzle, and a cavity is provided on the side of the piston, the cavity connects the third nozzle and the fourth nozzle, and the second nozzle is blocked by the wall of the piston;

[0009] When the piston is located at the emergency position, the cavity is connected to the third nozzle and the emergency discharge hole; the fourth nozzle is blocked by the wall of the piston; and the second nozzle is connected to the first nozzle.

[0010] Preferably, the emergency discharge orifice has a shear pin, which limits the piston from moving toward the emergency position when the piston is located in the working position, and the shear pin will break under a preset force.

[0011] Preferably, the axial distances between the third nozzle and the fourth nozzle, and between the fourth nozzle and the emergency discharge hole are equal.

[0012] Preferably, the third nozzle and the fourth nozzle, and the fourth nozzle and the emergency discharge hole are staggered along the circumferential direction of the shell.

[0013] Preferably, both sides of the cavity of the piston are provided with annular grooves, and sealing rings are installed in the grooves.

[0014] The advantages of the present application include: it can realize the cross-linking of the normal opening and closing of the canopy and the emergency jettisoning of the canopy, which can realize both the closing of the canopy under normal circumstances and the emergency jettisoning of the canopy under emergency circumstances. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a half-section diagram of a fluid distribution control valve according to a preferred embodiment of the present application;

[0016] Figure 2 It is a schematic diagram of a fluid distribution control valve according to a preferred embodiment of the present application;

[0017] Among them, 1-blocking cover, 2-piston, 3-shell, 4-first nozzle, 5-second nozzle, 6-third nozzle, 7-emergency discharge hole 8-fourth nozzle. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0019] like Figures 1-2 As shown, the shell 3 is cylindrical as a whole, and has an inner cavity, and a first nozzle 4, a second nozzle 5, a third nozzle 6, a fourth nozzle 8 and an emergency discharge hole 7 connected to the inner cavity, the first nozzle 4 is located at the front end surface of the shell 3, the second nozzle 5, the third nozzle 6, the fourth nozzle 8 and the emergency discharge hole 7 are located on the side of the shell 3, and the second nozzle 5 is located;

[0020] A piston 2 is installed in the inner cavity, and the piston 2 has the freedom of axial translation in the inner cavity;

[0021] A plugging cover 1, which blocks the rear end of the housing 3;

[0022] The third nozzle 6, the fourth nozzle 8 and the emergency discharge hole 7 all have an axial spacing, and the third nozzle 6 is located between the fourth nozzle 8 and the emergency discharge hole 7;

[0023] The piston 2 has two extreme positions along the axis in the inner cavity, namely, an emergency position and a working position. When the piston 2 is in the working position, the piston 2 contacts the first nozzle 4, and a cavity is provided on the side of the piston 2, the cavity is connected to the third nozzle 6 and the fourth nozzle 8, and the second nozzle 5 is blocked by the wall of the piston 2;

[0024] When the piston 2 is located at the emergency position, the cavity is connected to the third nozzle 6 and the emergency discharge hole 7; the fourth nozzle 8 is blocked by the wall of the piston 2; and the second nozzle 5 is connected to the first nozzle 4.

[0025] In some optional embodiments, the emergency discharge hole 7 has a shear pin, which limits the displacement of the piston 2 toward the emergency position when the piston 2 is located in the working position, and the shear pin will break under a preset force.

[0026] In some optional embodiments, the axial distances between the third nozzle 6 and the fourth nozzle 8, and between the fourth nozzle 8 and the emergency discharge hole 7 are equal.

[0027] In some optional embodiments, the third nozzle 6 and the fourth nozzle 8 , and the fourth nozzle 8 and the emergency discharge hole 7 are staggered along the circumferential direction of the shell 3 .

[0028] In some optional embodiments, the cavity of the piston 2 has annular grooves on both sides, and sealing rings are installed in the grooves.

[0029] When this application is implemented, it is used for the canopy operating system. Under normal circumstances, gas with a pressure of 4.9Mpa is introduced from 8, and the airflow enters the upper chamber of the canopy actuator through 6, causing the actuator to move downward and close the canopy normally; in emergency situations, a mixture of cold air and fuel gas above 12.8Mpa is introduced from 4, and under the action of high-pressure gas, the shear pin is sheared off, pushing 2 to move rapidly to the left, and the airflow path from 8 to 6 is cut off. The high-pressure airflow enters the lower chamber of the canopy actuator through 5, and the actuator moves rapidly upward. At the same time, the gas in the upper chamber of the actuator enters 7 through 6 and is discharged to the atmosphere, realizing the emergency jettisoning of the canopy.

[0030] The advantages of the present application include: it can realize the cross-linking of the normal opening and closing of the canopy and the emergency jettisoning of the canopy, which can realize both the closing of the canopy under normal circumstances and the emergency jettisoning of the canopy under emergency circumstances.

[0031] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A fluid distribution control valve, characterized in that: include: A shell (3); the shell (3) is cylindrical in shape as a whole, and has an inner cavity, and a first nozzle (4), a second nozzle (5), a third nozzle (6), a fourth nozzle (8) and an emergency discharge hole (7) connected to the inner cavity, the first nozzle (4) being located at the front end surface of the shell (3), and the second nozzle (5), the third nozzle (6), the fourth nozzle (8) and the emergency discharge hole (7) being located at the side of the shell (3); A piston (2), the piston (2) being mounted in the inner cavity, and the piston (2) having a degree of freedom of axial translation in the inner cavity; A plugging cover (1), the plugging cover (1) blocks the rear end of the housing (3); The third nozzle (6), the fourth nozzle (8) and the emergency discharge hole (7) all have an axial spacing, and the third nozzle (6) is located between the fourth nozzle (8) and the emergency discharge hole (7); The piston (2) has two extreme positions along the axis in the inner cavity, namely an emergency position and a working position. When the piston (2) is in the working position, the piston (2) contacts the first nozzle (4). The side of the piston (2) has a cavity, which is connected to the third nozzle (6) and the fourth nozzle (8). The second nozzle (5) is blocked by the wall of the piston (2). When the piston (2) is located in the emergency position, the cavity is connected to the third nozzle (6) and the emergency discharge hole (7); the fourth nozzle (8) is blocked by the wall of the piston (2); and the second nozzle (5) is connected to the first nozzle (4).

2. The fluid distribution control valve according to claim 1, characterized in that: The emergency discharge hole (7) has a shear pin, which limits the displacement of the piston (2) toward the emergency position when the piston (2) is located in the working position, and the shear pin will break under a preset force.

3. The fluid distribution control valve according to claim 1, characterized in that: The axial distances between the third nozzle (6) and the fourth nozzle (8), and between the fourth nozzle (8) and the emergency discharge hole (7) are equal.

4. The fluid distribution control valve according to claim 1, characterized in that: The third nozzle (6) and the fourth nozzle (8), and the fourth nozzle (8) and the emergency discharge hole (7) are staggered along the circumferential direction of the shell (3).

5. The fluid distribution control valve according to claim 1, characterized in that: The cavity of the piston (2) has annular grooves on both sides, and sealing rings are installed in the grooves.

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