Dual flow regulating valve

Abstract

This utility model belongs to the field of aircraft fuel nitrogen inerting technology, and discloses a dual-flow regulating valve, which includes: a first air path having a first pipeline, on which a valve and a flow-limiting valve are connected in series, the valve being controlled to open / close by a pneumatic actuator; and a second air path having a second pipeline arranged in parallel with the first pipeline, on which a flow-limiting valve is provided. This utility model makes full use of the valve's closed and open states.

Description

Technical Field

[0001] This utility model belongs to the field of propeller aerodynamic calculation technology, specifically relating to a dual flow regulating valve. Background Technology

[0002] In the design of most fuel inerting systems, different nitrogen-rich gas volumes are applied in different flight phases to meet the aircraft's inerting gas volume requirements for optimal design. At the same time, in order to simplify the complex design of the control valve, a pneumatic regulation method is applied to achieve two-stage flow regulation.

[0003] To address the aforementioned problems, this utility model is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-flow regulating valve to solve the problem of low valve utilization efficiency.

[0005] The technical solution of this utility model is implemented as follows: A dual-flow regulating valve, comprising: The first air passage has a first pipeline, on which a valve and a flow-limiting valve are connected in series. The valve is controlled to open / close by a pneumatic actuator. The second gas passage has a second pipeline arranged in parallel with the first pipeline, and a flow limiting valve is provided on the second pipeline.

[0006] As a further embodiment of this utility model: the pneumatic actuator includes a solenoid valve and a drive air chamber. The solenoid valve is a two-position three-way solenoid valve, with port A connected to the air inlet, port B connected to the drive air chamber, and port C connected to the atmosphere. A pneumatic piston is provided in the drive air chamber, and a push rod is provided on the lower surface of the pneumatic piston.

[0007] As a further embodiment of this utility model: a guide rod is provided below the valve, and a return spring is sleeved on the guide rod, the return spring pressing the valve tightly.

[0008] As a further embodiment of this utility model: the A port of the solenoid valve is connected to the air inlet through an air guide pipe, and a flow limiting hole is provided on the air guide pipe.

[0009] As a further embodiment of this utility model: the diameter of the air guide tube is 1.5mm, the flow rate is limited to less than 10kg / h, and the inflation time of the driving air chamber is no more than 2s, that is, the valve actuation time is less than 2s.

[0010] As a further embodiment of this utility model: a micro switch is provided at the upper end of the driving air chamber, which is connected to the driving air chamber and used to release control air.

[0011] As a further embodiment of this utility model: the driving air chamber is divided into a driving chamber, an air outlet chamber and an air inlet chamber from top to bottom. The valve is located between the air outlet chamber and the air inlet chamber. The pneumatic piston is located in the driving chamber. One end of the push rod is in the driving chamber, and the other end extends into the air outlet chamber and is directly opposite the valve.

[0012] As a further embodiment of this invention, the driving chamber, the exhaust chamber, and the intake chamber are sealed to each other.

[0013] As a further embodiment of this utility model: the first air passage and the second air passage are connected in parallel and share a common air inlet and air outlet.

[0014] The beneficial effects of this application are as follows: 1. The dual-flow regulating valve designed in this application makes full use of the valve's closed and open states, which is beneficial for the long-term use of the valve and simplifies the structural design of the regulating valve.

[0015] 2. This application designs two gas paths to fully regulate the gas flow and meet the aircraft's inert gas requirements.

[0016] The present application will be further described in detail below with reference to the accompanying drawings of the embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a dual-flow regulating valve according to the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0019] In the accompanying drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this utility model.

[0020] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] The following is in conjunction with the appendix Figure 1 The embodiments of this utility model will be described in detail below.

[0022] Example 1 This utility model provides a dual-flow regulating valve, which includes: The first air passage has a first pipeline, on which a valve and a flow-limiting valve are connected in series. The valve is controlled to open / close by a pneumatic actuator. The second gas passage has a second pipeline arranged in parallel with the first pipeline, and a flow limiting valve is provided on the second pipeline.

[0023] Furthermore, the pneumatic actuator includes a solenoid valve and a drive air chamber. The solenoid valve is a two-position three-way solenoid valve, with port A connected to the air inlet, port B connected to the drive air chamber, and port C connected to the atmosphere. A pneumatic piston is provided in the drive air chamber, and a push rod is provided on the lower surface of the pneumatic piston.

[0024] Furthermore, a guide rod is provided below the valve, and a return spring is sleeved on the guide rod, which presses the valve tightly.

[0025] Furthermore, the solenoid valve A port is connected to the air inlet end through an air guide pipe, and a flow limiting hole is provided on the air guide pipe.

[0026] Furthermore, the diameter of the air guide pipe is 1.5mm, limiting the flow rate to below 10kg / h, so that the inflation time of the driving air chamber is no more than 2s, that is, the valve actuation time is less than 2s.

[0027] Furthermore, a micro switch is provided at the upper end of the driving air chamber, which is connected to the driving air chamber and used to release control air.

[0028] Furthermore, the driving air chamber is divided into a driving chamber, an air outlet chamber, and an air inlet chamber from top to bottom. The valve is located between the air outlet chamber and the air inlet chamber. The pneumatic piston is located in the driving chamber. One end of the push rod is in the driving chamber, and the other end extends into the air outlet chamber and is directly opposite the valve.

[0029] Furthermore, the drive chamber, the exhaust chamber, and the intake chamber are sealed to each other.

[0030] Furthermore, the first and second air passages are connected in parallel, sharing a common air inlet and outlet.

[0031] This invention introduces gas from the air end as the pilot control gas source. When the solenoid valve is energized, port A opens, port C closes, and port B remains normally open. The control gas source enters the pneumatic actuator through port A and port B. The gas source pressure acts on the pneumatic piston, and under the action of the control gas source, it overcomes the force of the return spring, driving the piston to move and open the valve, thus opening the first gas path. When the solenoid valve is de-energized, port A closes, port C opens, and the control gas in the drive gas chamber is released to the atmosphere through a microswitch. The return spring pushes the piston back to its original position, the valve closes, and the first gas path is shut off.

[0032] Example 2 This utility model provides a dual-flow regulating valve, which includes: a two-position three-way solenoid valve and a driving mechanism, wherein: The two-position three-way solenoid valve is installed outside the gas pipeline. The inlet end of the gas pipeline is connected to port A of the two-position three-way solenoid valve through a gas guide pipe. Port B of the two-position three-way solenoid valve is connected to the drive air chamber in the drive mechanism, and port C is connected to the atmosphere. Different drive modes of the two-position three-way solenoid valve can connect A and B or B and C. The diameter of the gas guide pipe is 1.5mm, which can limit the flow rate to below 10kg / h and make the gas chamber filling time no more than 2s, that is, the valve actuation time is less than 2s. The drive mechanism includes a housing, and the drive air chamber is located in the middle of the drive mechanism. Each side of the housing has a spring chamber and a return spring is installed in it. A pneumatic piston is installed between the return spring and the drive air chamber. A vent hole communicating with the outside is opened at the end of the spring chamber.

[0033] The driving air chamber is a sealed chamber, and a push rod is installed inside the driving air chamber; the air pressure acts on the pneumatic piston, and pushes the valve open through the push rod.

[0034] The working process of this utility model is as follows: First, when the two-position three-way solenoid valve is energized, high-temperature gas enters the high-temperature gas pipeline and is used as the pilot control gas source. Port A is open, port C is closed, and port B is normally open. The control gas source enters the drive gas chamber through port A and port B. The gas source pressure acts on the pneumatic piston, which pushes the pneumatic piston to overcome the force of the return spring, thereby driving the valve to open. When the solenoid valve is de-energized, port A closes, port C opens, the control gas in the drive gas chamber is released to the atmosphere, the return spring pushes the piston to return to its original position, and the valve closes.

[0035] The dual-flow regulating valve designed in this utility model makes full use of the valve's closed and open states, which is beneficial for the valve's long-term use and simplifies the regulating valve's structural design.

[0036] Thus, the objective of this utility model has been achieved.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dual-flow regulating valve, characterized in that, include: The first air passage has a first pipeline, on which a valve and a flow-limiting valve are connected in series. The valve is controlled to open / close by a pneumatic actuator. The second air passage has a second pipeline arranged in parallel with the first pipeline, and a flow limiting valve is provided on the second pipeline.

2. The dual-flow regulating valve according to claim 1, characterized in that, The pneumatic actuator includes a solenoid valve and a drive air chamber. The solenoid valve is a two-position three-way solenoid valve, with port A connected to the air inlet, port B connected to the drive air chamber, and port C connected to the atmosphere. A pneumatic piston is provided in the drive air chamber, and a push rod is provided on the lower surface of the pneumatic piston.

3. The dual-flow regulating valve according to claim 2, characterized in that, A guide rod is provided below the valve, and a return spring is sleeved on the guide rod, which presses the valve tightly.

4. The dual-flow regulating valve according to claim 3, characterized in that, The solenoid valve A port is connected to the air inlet end through an air guide pipe, and a flow limiting hole is provided on the air guide pipe.

5. The dual flow regulating valve of claim 4, wherein, The diameter of the air guide pipe is 1.5mm, and the flow rate is limited to below 10kg / h, so that the inflation time of the driving air chamber is no more than 2s, that is, the valve actuation time is less than 2s.

6. The dual flow regulating valve of claim 5, wherein, A micro switch is provided at the upper end of the driving air chamber, which is connected to the driving air chamber and used to release control air.

7. The dual flow regulating valve of claim 3, wherein, The driving air chamber is divided into a driving chamber, an air outlet chamber, and an air inlet chamber from top to bottom. The valve is located between the air outlet chamber and the air inlet chamber. The pneumatic piston is located in the driving chamber. One end of the push rod is in the driving chamber, and the other end extends into the air outlet chamber and is directly opposite the valve.

8. The dual-flow regulating valve according to claim 7, characterized in that, The drive chamber, exhaust chamber, and intake chamber are sealed to each other.

9. The dual flow regulating valve according to any one of claims 1-8, characterized in that, The first and second air passages are connected in parallel and share a common air inlet and outlet.

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