Self-cleaning smoke trail solenoid valve for airplane

Abstract

A self-cleaning smoke trail solenoid valve for an airplane. A cleaning gas port (F) is provided at the upper portion of a main valve body (P); a channel (H) which is perpendicular to a cleaning gas line (G) and passes through the cleaning gas line (G) is provided in the middle of the main valve body (P), a smoke-trail liquid inlet (A) and a main valve element (K) are provided on one side of the channel (H), a reset spring (Q) is sleeved on the main valve element (K), a pilot valve (C) is provided at the bottom end of the channel (H) on the other side, and the main valve body (P) located at the pilot valve (C) end is provided with a gas channel configured to connect a control gas port (D) to the channel (H), a pilot pressure-release port (E) and the control gas port (D); and a smoke-trail liquid discharge port (B) is provided at the lower portion of the main valve body (P), and the cleaning gas line (G) passes through between the cleaning gas port (F) and the smoke-trail liquid discharge port (B).

Description

An aircraft self-cleaning smoke solenoid valve

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311606894.4, filed on November 29, 2023, entitled “A Self-Cleaning Smoke Solenoid Valve for Aircraft”, which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the technical field of smoke extraction devices, and in particular to a self-cleaning smoke extraction solenoid valve for aircraft. Background Art

[0004] The smoke solenoid valve is a smoke and purge control device in the smoke system, used to meet the needs of aircraft during aerial smoke displays. According to current aircraft smoke system designs, the smoke solenoid valve only controls the flow of smoke liquid. However, in actual use, due to the inherent viscosity and corrosiveness of smoke liquid, prolonged residue can damage the solenoid valve and piping components, leading to various faults such as solenoid valve sticking, improper actuation, and poor sealing. Furthermore, it can corrode and clog the piping components in the smoke system, affecting the aircraft's smoke display and the duration of the smoke display.

[0005] Therefore, it is necessary to be able to clean the smoke system before and after the aircraft performs a smoke show. While ensuring the smoke-pulling function, the damage of the smoke liquid to the solenoid valves and pipeline components in the smoke-pulling system can be reduced, thereby reducing the system maintenance time and repair costs, and extending the service life of the solenoid valves and pipeline components.

[0006] Summary of the Invention

[0007] The technical problem solved by the present application is to provide an aircraft self-cleaning smoke extraction solenoid valve to solve the problems in the above-mentioned background technology.

[0008] The technical problem solved by this application is achieved by the following technical solutions:

[0009] , a pair of airbags connected to the control valve, is connected with the control valve, and the control valve is connected with the control valve.

[0010] In the present application, the control air port is provided with a control valve.

[0011] In the present application, the purge gas port is provided with a one-way valve.

[0012] In this application, the smoke extraction solenoid valve provides two states: smoke extraction and cleaning:

[0013] When the smoke is pulled, the pilot valve is at the bottom of the channel. At this time, the pilot valve blocks the control air port, the pilot pressure relief port opens, the pressure in the upper chamber of the main valve core decreases, and the smoke liquid in the smoke liquid inlet pushes the main valve core to squeeze the return spring to move. The smoke liquid inlet is connected to the smoke liquid discharge port, and the smoke liquid is discharged to the engine tail nozzle to pull the smoke;

[0014] During cleaning, the pilot valve moves in the channel under the action of electromagnetic force. At this time, the pilot pressure relief port is blocked by the pilot valve, the control air port is opened, and the control gas enters from the control air port. The main valve core moves to one side of the channel under the action of the return spring and the control gas pressure, and the smoke pulling liquid inlet is closed. At this time, the cleaning gas enters from the cleaning air port to clean the main valve body, main valve core and smoke pulling parts.

[0015] Beneficial effects: This application can realize the self-cleaning function of the smoke pulling system, reduce the maintenance time of the smoke pulling system, and at the same time extend the service life of the smoke pulling solenoid valve; it has been successfully used in some training aircraft, is safe and reliable, and is easy to maintain, and has achieved good social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of a preferred embodiment of the present application. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by this application easy to understand, the application is further explained below with reference to specific diagrams.

[0018] Referring to FIG1 , an aircraft self-cleaning smoke solenoid valve comprises a main valve body P, a main valve core K, a return spring Q, a smoke liquid inlet A, a smoke liquid discharge port B, a pilot valve C, a control air port D, a pilot pressure relief port E, a cleaning air port F, a cleaning gas pipeline G and a channel H. A cleaning air port F is provided on the upper portion of the main valve body P, and a smoke liquid discharge port B is provided on the lower portion of the main valve body P corresponding to the cleaning air port F. The cleaning gas pipeline G passes through the cleaning air port F and the cleaning gas port B. Between the smoke-drawing liquid discharge port B, a channel H is provided in the middle of the main valve body P, which is perpendicular to the cleaning gas pipeline G and passes through the cleaning gas pipeline G. A smoke-drawing liquid inlet A, a main valve core K and a reset spring Q are provided on one side of the channel H, and the reset spring Q is mounted on the main valve core K. A pilot valve C is provided at the bottom end of the other side of the channel H; at the same time, an air duct, a pilot pressure relief port E and a control air port D for connecting the control air port D with the channel H are provided on the main valve body P located at the end of the pilot valve C.

[0019] In this embodiment, the smoke extraction solenoid valve provides two states: smoke extraction and cleaning:

[0020] When smoke is drawn, the pilot valve C is at the bottom of the channel H. At this time, the pilot valve C blocks the control air port D, the pilot pressure relief port E opens, the pressure in the upper chamber of the main valve core K decreases, and the smoke liquid in the smoke liquid inlet A pushes the main valve core K to squeeze the return spring Q to move. The smoke liquid inlet A is connected to the smoke liquid discharge port B, and the smoke liquid is discharged to the engine tail nozzle to draw smoke;

[0021] During cleaning, the pilot valve C moves in the channel H under the action of electromagnetic force. At this time, the pilot pressure relief port E is blocked by the pilot valve C, the control air port D is opened, and the control gas enters from the control air port D. The main valve core K moves to the side of the channel H under the action of the reset spring Q and the control gas pressure. The smoke-pulling liquid inlet A is closed. At this time, the cleaning gas enters from the cleaning air port F to clean the main valve body P, the main valve core K and the smoke-pulling part.

[0022] In this embodiment, the cleaning gas port F is provided with a one-way valve for preventing the smoke-drawing liquid from entering the cleaning gas pipeline; the control gas port D is provided with a control valve. During cleaning, since the cleaning gas and the control gas belong to the same gas source, when a large amount of gas is used for cleaning, it is easy to cause the control gas pressure to decrease, thereby affecting the air pressure in the upper cavity of the main valve core K, causing the smoke-drawing liquid inlet A to be unable to be sealed, and the smoke-drawing liquid is discharged from the smoke-drawing liquid inlet A. Therefore, a control valve is provided at the control gas port D to ensure that during cleaning, the gas pressure at the control gas port D is not back-drawn away, resulting in a pressure drop, thereby ensuring that the main valve core seals the smoke-drawing liquid inlet.

[0023] In this embodiment, the smoke-pulling part of the smoke-pulling solenoid valve is cleaned by adding a cleaning function to blow the smoke-pulling liquid remaining in the smoke-pulling solenoid valve out of the smoke-pulling solenoid valve, thereby preventing corrosion damage to the smoke-pulling solenoid valve and smoke-pulling pipeline components.

[0024] The above shows and describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present application. Various changes and improvements may be made to the present application without departing from the scope of the present application, and such changes and improvements fall within the scope of the present application. The scope of protection claimed in this application is defined by the appended claims and their equivalents.

Claims

1. An aircraft self-cleaning smoke-pulling solenoid valve, comprising a main valve body, a reset spring, a smoke-pulling liquid inlet, a smoke-pulling liquid outlet, a main valve core, a control air port, a pilot pressure relief port, a cleaning air port, a pilot valve, a cleaning gas pipeline and a channel, wherein a cleaning air port is arranged on the upper portion of the main valve body; a channel perpendicular to the cleaning gas pipeline and passing through the cleaning gas pipeline is arranged in the middle portion of the main valve body, a smoke-pulling liquid inlet and a main valve core are arranged on one side of the channel, a reset spring is mounted on the main valve core, a pilot valve is arranged at the bottom end of the other side of the channel, and at the same time, an airway, a pilot pressure relief port and a control air port for connecting the control air port and the channel are arranged on the main valve body located at the pilot valve end; a smoke-pulling liquid outlet is arranged at the lower portion of the main valve body, and the cleaning gas pipeline passes through between the cleaning air port and the smoke-pulling liquid outlet.

2. An aircraft self-cleaning smoke extraction solenoid valve according to claim 1, wherein: The control air port is provided with a control valve.

3. The aircraft self-cleaning smoke extraction solenoid valve according to claim 1, wherein: The cleaning air port is provided with a one-way valve.

4. An aircraft self-cleaning smoke solenoid valve according to any one of claims 1 to 3, wherein: The smoke extraction solenoid valve provides two functions: smoke extraction and cleaning: When the smoke is pulled, the pilot valve is at the bottom of the channel, the pilot valve blocks the control air port, the pilot pressure relief port opens, the pressure in the upper chamber of the main valve core decreases, the smoke-pulling liquid in the smoke-pulling liquid inlet pushes the main valve core to squeeze the reset spring to move, the smoke-pulling liquid inlet is connected with the smoke-pulling liquid discharge port, and the smoke-pulling liquid is discharged to the tail nozzle of the engine to pull the smoke; During cleaning, the pilot valve moves in the channel under the action of electromagnetic force, the pilot pressure relief port is blocked by the pilot valve, the control air port is opened, the control gas enters from the control air port, and the main valve core moves to one side of the channel under the action of the return spring and the control gas pressure, and the smoke-pulling liquid inlet is closed. At this time, the cleaning gas enters from the cleaning air port to clean the main valve body, main valve core and smoke-pulling parts.

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