Pressure control electronic valve

Abstract

The utility model belongs to a life support system of a manned aircraft, and particularly relates to a pressure control electronic valve. An oxygen supply expiration cavity valve is of a mechanical structure, the pressure control of the oxygen supply expiration cavity valve is only based on a pressure sensing mechanism, and the current accurate pressure control of a breathing cavity cannot be well met. The pressure control electronic valve comprises a stepping motor, a shell, a guide column, a spring and a valve assembly, the shell is of an annular structure, an opening is formed in the wall body of the shell, a flange structure is arranged at the front end of the shell and installed at the position of an opening of a breathing cavity of an oxygen supply regulator, and the stepping motor is installed at the rear end of the shell in a sealed mode; a guide column is fixedly installed at the front end of the stepping motor, the guide column is of an annular structure and is provided with a radial boss, the guide column is sleeved with the spring, and the front end of the spring abuts against the valve assembly. The opening amount of the valve is accurately controlled through the stepping motor, and it is guaranteed that the pressure of the breathing cavity is within the required range.

Description

Technical Field

[0001] The utility model belongs to the life support system of manned aircraft, and particularly relates to a pressure control electronic valve. Background Art

[0002] The life support systems of fighter jets are all equipped with electronic oxygen supply and anti-G regulation systems. The valve of the oxygen supply and exhalation cavity in this system adopts a mechanical structure, and its pressure control only depends on the pressure sensing mechanism, which cannot well meet the current precise control of the breathing cavity pressure. Therefore, there is an urgent need for a pressure control electronic valve to accurately control the breathing cavity pressure. Content of the Utility Model

[0003] The purpose of the utility model is to provide a pressure control electronic valve to accurately control the pressure of the breathing cavity of the oxygen regulator.

[0004] The utility model provides a pressure control electronic valve for controlling the pressure of the breathing cavity of the oxygen regulator, which includes a stepper motor, a housing, a guide post, a spring and a valve assembly. The housing is of a ring structure and has an opening on the wall. The front end of the housing has a flange structure and is installed at the opening of the breathing cavity of the oxygen regulator. The rear end of the housing is sealed with the stepper motor installed. A guide post is fixedly installed at the front end of the stepper motor. The guide post is of a ring structure and has a radial boss. The spring is sleeved on the guide post, and the front end of the spring abuts against the valve assembly.

[0005] Advantageously, the guide post is of a cup structure, has a through hole at the bottom and a radial boss extending outwards at the top.

[0006] Advantageously, the front end of the stepper motor has a stud, the stud passes through the through hole of the guide post and is connected with a hexagonal flat nut, and the inside of the guide post is limited by a stepped surface.

[0007] Advantageously, a washer is also installed between the guide post and the stepped surface.

[0008] Advantageously, the valve assembly is composed of a valve, a mica sheet and a valve rod.

[0009] Advantageously, the middle part of the valve rod has a disc structure, and the screw part on the inner side of the disc structure sequentially passes through the mica sheet and the valve and is connected with a hexagonal flat nut.

[0010] Advantageously, the mica sheet completely covers the outer end surface of the valve.

[0011] Advantageously, the inner side of the valve has a ring structure, and the front end of the spring 6 is sleeved on this ring structure.

[0012] Beneficial Effects: The pressure control electronic valve designed by the utility model accurately controls the opening amount of the valve through the stepper motor, ensuring that the breathing cavity pressure is within the required range.

[0013] The features, functions, and advantages discussed above can be implemented independently in various examples or combined in other examples. Other details of the examples can be seen with reference to the following description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] When read in conjunction with the accompanying drawings, the examples, as well as the preferred mode of use, other purposes, and descriptions thereof, will be best understood by reference to the following detailed description of examples of the present utility model, in which:

[0015] Figure 1 is a schematic structural diagram of the pressure control electronic valve of the present utility model.

[0016] Wherein: 1 - stepper motor; 2 - housing; 3 - guide post; 4 - washer; 5 - hexagonal flat nut; 6 - spring; 7 - valve; 8 - mica sheet; 9 - valve rod DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples can be described and these examples should not be construed as limited to the examples set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0018] Now referring to Figure 1 , there is illustrated a pressure control electronic valve, including a stepper motor 1, a housing 2, a guide post 3, a washer 4, a hexagonal flat nut 5, a spring 6, a valve 7, a mica sheet 8, and a valve rod 9. Among them, the stepper motor 1 receives instructions from the controller and controls the advancement of a certain distance according to the electrical pulse signal; the guide post 3 is fixed at the front end of the stepper motor through the washer 4 and the hexagonal flat nut 5; a valve assembly for controlling the pressure is composed of the valve 7, the mica sheet 8, and the valve rod 9, wherein the mica sheet 8 is used to ensure the flatness of the valve. The stepper motor 1 serves as an actuator for controlling the pressure in the breathing chamber, transmits the pressure to the valve assembly through the spring 6, and then accurately controls the opening amount of the valve assembly to ensure the pressure in the breathing chamber of the oxygen supply regulator.

[0019] The description of different advantageous arrangements has been presented for purposes of illustration and description, but the description is not intended to be exclusive or limited to the examples in the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, different advantageous examples may describe different advantages compared to other advantageous examples. The selected example or examples are chosen and described in order to best illustrate the principles of the examples, the practical application, and to enable those of ordinary skill in the art to understand the disclosure having various examples that have been modified for the particular use contemplated.

Claims

1. A pressure-controlled electronic valve for controlling the pressure of a breathing chamber of an oxygen supply regulator, characterized in that: The invention comprises a stepper motor (1), a housing (2), a guide column (3), a spring (6) and a valve assembly, wherein the housing (2) is an annular structure and has an opening on the wall, the front end of the housing (2) has a flange structure and is installed at the opening of the breathing chamber of the oxygen supply regulator, and the rear end of the housing (2) is sealed to install the stepper motor (1); the front end of the stepper motor (1) is fixedly installed with a guide column (3), the guide column (3) is an annular structure and has a radial boss, the spring (6) is sleeved on the guide column (3), and the front end of the spring (6) abuts against the valve assembly.

2. The pressure-controlled electronic valve according to claim 1, characterized in that: The guide column (3) is a cup-shaped structure, having a through hole at the bottom and an outward radial boss at the top.

3. The pressure-controlled electronic valve according to claim 2, characterized in that: The front end of the stepper motor (1) is provided with a stud, which passes through the through hole of the guide post (3) and is connected to the hexagonal flat nut (5), and the inside of the guide post (3) is limited by a step surface.

4. The pressure-controlled electronic valve according to claim 3, characterized in that: A washer (4) is also installed between the guide post (3) and the step surface.

5. The pressure-controlled electronic valve according to claim 1, characterized in that: The valve assembly is composed of a valve (7), a mica sheet (8) and a valve rod (9).

6. The pressure-controlled electronic valve according to claim 5, characterized in that: The valve rod (9) has a disc-shaped structure in the middle, and the screw rod portion inside the disc-shaped structure passes through the mica sheet (8) and the valve (7) in sequence and is connected to the hexagonal flat nut (5).

7. The pressure-controlled electronic valve according to claim 6, characterized in that: The outer end surface of the valve (7) is completely covered with a mica sheet (8).

8. The pressure-controlled electronic valve according to claim 7, characterized in that: The inner side of the valve (7) has an annular structure, and the front end of the spring (6) is sleeved on the annular structure.

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