KR102166414B1 - Sealed pressure regulating valve and pressure regulating method thereof - Google Patents

Abstract

The proposed technology relates to a hermetic pressure control valve, and more particularly, to a hermetic pressure control valve capable of maintaining the outlet pressure in the operating range up to a certain temperature using a shape memory alloy spring.

Description

Sealed pressure regulating valve and pressure regulating method thereof

The proposed technology relates to a sealed pressure control valve and its pressure control method, and more specifically, to a hermetic pressure control valve that can maintain the outlet pressure of the operating range up to a certain temperature using a shape memory alloy spring, and its pressure control method. It is about the invention.

In general, a pressure control valve is a device that controls and discharges a high-pressure gas to a designed pressure. In the case of a pressure control valve applied to an aircraft, the internal pressure of the pressure control valve may fluctuate due to atmospheric pressure that varies depending on the altitude, and because of this, the outlet pressure of the pressure control valve may change, a closed pressure control valve is sometimes applied.

However, in this case, when the ambient temperature of the pressure control valve increases, the trapped air inside the pressure control valve is heated and the pressure rises, thereby causing an adverse effect of increasing the outlet pressure of the pressure control valve by the amount of the pressure increase of the trapped air.

Therefore, in order to use the sealed pressure control valve in a high-temperature environment, it is difficult to have a heat insulating layer, and if heat transfer is not effectively blocked, there is a problem that may lead to system failure.

Korean Patent Registration No. 10-0439644

The present invention has been invented to solve the above problems, and an object of the present invention is to maintain an outlet pressure in an operating range up to a certain temperature without a separate insulating layer.

In the sealed pressure control valve of the present invention for achieving the above object,

It is characterized in that the second spring prevents tensioning of the first spring when the first spring is tensioned, which causes an increase in the outlet pressure as the internal temperature increases.

The pressure regulating valve,

It is divided into a first space and a second space by a diaphragm, and the first space includes a first chamber of the first spring and a second chamber of the second spring.

The second space is characterized in that it is a space in which the outlet pressure of the gas is adjusted.

The first space and the second chamber are communicated through a central hole to have the same temperature and pressure.

The first spring, the second spring, and the central hole are characterized in that they form coaxial.

The first spring is characterized in that the diaphragm is elastically supported.

The diaphragm is characterized in that it expands in a direction that increases the pressure in the second space.

A first seating plate is mounted between the diaphragm and the first spring.

It is characterized in that the second seating plate is provided inside the second chamber and the position is changed by the second spring.

The first spring is characterized in that it is connected to the second spring by a connecting rod penetrating through the central hole.

One end of the connecting rod is connected to the center of the first seating plate,

The other end of the connection rod is characterized in that it is connected to the center of the second seating plate.

The internal pressure of the first space is characterized by being atmospheric pressure at room temperature.

When the first space is at room temperature,

Pr=(F _{1st spring} -F _{2nd spring @ room temperature} )/A _Diaphragm +Patm

(Where Pr is the pressure of the second space, F _{the first spring} is the spring force of the first spring, F _{the second spring @ room temperature} is the spring force of _{the second spring at room} temperature, A _diaphragm is the area of the diaphragm, Patm is the atmospheric pressure. ).

When the first space is above room temperature,

)/A_{다이어프램}+Patm+P

Pr=(F _{1st spring} -F _{2nd spring @ room temperature} -F _{2nd spring,}

)/A _Diaphragm +Patm+P

는 온도 상승에 의해 증가된 제2스프링의 스프링력, P

는 제1공간의 내부 온도 증가로 인해 증가된 내부 압력)인 것을 특징으로 한다.(Here, F _{second spring,}

Is the spring force of the second spring increased by temperature rise, P

Is an internal pressure increased due to an increase in the internal temperature of the first space).

The spring force of the first spring is characterized in that it is greater than the spring force of the second spring.

In the pressure control method of the sealed pressure control valve of the present invention for achieving the above object,

Gas is introduced into the second space, pressure is adjusted, and then discharged;

Increasing the internal pressure of the first space by increasing the internal temperature of the first space;

Increasing the internal pressure of the second space while expanding the diaphragm due to the increase of the internal pressure of the first space;

A step in which the first space reaches a predetermined temperature or higher;

The first spring is tensioned by a predetermined length or more;

Increasing the stiffness of the second spring by increasing the temperature of the first space;

Stretching the second spring in a direction opposite to that of the first spring;

Stopping tensioning of the first spring due to tensioning of the second spring;

Stopping the expansion of the diaphragm by stopping the tension of the first spring; And

And maintaining the pressure in the second space.

After the step of maintaining the pressure in the second space.

Reducing the temperature of the first space;

Reducing the pressure in the first space;

Reducing the stiffness of the second spring;

A step in which the first spring is contracted while the diaphragm is contracted;

Reducing the pressure in the second space; And

And introducing external gas into the second space.

When the temperature of the first space is less than a certain temperature before the pressure of the first space increases due to the temperature increase of the first space, the second spring is in a compressed state.

In the step where gas is introduced into the second space from the outside and discharged after adjusting the pressure, the pressure of the first space is atmospheric pressure at room temperature.

The spring force of the first spring is characterized in that it is greater than the spring force of the second spring.

When the first space is at room temperature,

Pr=(F _{1st spring} -F _{2nd spring @ room temperature} )/A _Diaphragm +Patm

(Where Pr is the pressure of the second space, F _{the first spring} is the spring force of the first spring, F _{the second spring @ room temperature} is the spring force of _{the second spring at room} temperature, A _diaphragm is the area of the diaphragm, Patm is the atmospheric pressure. ).

When the first space is above room temperature,

)/A_{다이어프램}+Patm+P

Pr=(F _{1st spring} -F _{2nd spring @ room temperature} -F _{2nd spring,}

)/A _Diaphragm +Patm+P

는 온도 상승에 의해 증가된 제2스프링의 스프링력, P

는 제1공간의 내부 온도 증가로 인해 증가된 내부 압력) 인 것을 특징으로 한다.(Here, F _{second spring,}

Is the spring force of the second spring increased by temperature rise, P

Is characterized in that the internal pressure increased due to an increase in the internal temperature of the first space).

According to the present invention, by using a shape memory alloy spring to attenuate the outlet pressure above a specific temperature by one step, there is an effect that the outlet pressure in the operating range can be maintained to a certain temperature without a separate heat insulating layer.

1 is a cross-sectional view of a closed pressure control valve according to the present invention before inflow of external gas.
Figure 2 is a cross-sectional view of the closed-type pressure control valve according to the present invention after increasing the internal pressure.

The features and effects of the present invention described above will become more apparent through the following detailed description in connection with the accompanying drawings, and accordingly, those of ordinary skill in the technical field to which the present invention pertains can easily implement the technical idea of the present invention. I will be able to. Since the present invention can apply various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form of disclosure, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. The terms used in the present application are merely for describing specific embodiments, and are not intended to limit the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a closed-type pressure control valve, and more particularly, to a closed-type pressure control valve capable of maintaining an outlet pressure of an operating range up to a predetermined temperature using a shape memory alloy spring.

FIG. 1 is a cross-sectional view showing a state of the sealed pressure control valve according to the present invention before inflow of external gas, and FIG. 2 is a cross-sectional view illustrating the state of the sealed pressure regulating valve according to the present invention after increasing the internal pressure.

The sealed pressure control valve of the present invention controls the external gas flowing into the pressure control valve to the design pressure and discharges it to the outside, and the first spring 10 causes an increase in the outlet pressure as the internal temperature rises. The second spring 20 whose stiffness is changed according to the temperature during tensioning of the second spring 20 prevents the tension of the first spring 10 to prevent an increase in the outlet pressure.

For this purpose, the pressure control valve of the present invention includes a lower chamber 2 having an inlet 28 through which external gas is introduced, and an outlet 30 through which the gas is discharged. It comprises an upper chamber (4).

The upper chamber 4 is divided into a first chamber 6 in which the first spring 10 is provided and a second chamber 18 in which the second spring 20 is provided.

The first chamber 6 is divided into a first space 8 and a second space 16 by a diaphragm, and the first spring 10 is provided in the first space 8, and the The second space 16 becomes a space in which the outlet pressure of the gas is adjusted. The outlet 30 is formed in the second space 16.

The lower chamber 2 and the second space 16 are communicated with each other by a flow path 32 having a predetermined area.

The first space 8 and the second space 16 communicate with each other through a central hole 24 to have the same temperature and pressure.

The first spring 10 and the second spring 20 are positioned coaxially with the central hole 24 and are stretched and contracted in opposite directions.

The second spring 20 is a spring made of a shape memory alloy material whose stiffness increases as the temperature increases, and the spring force of the first spring 10 is greater than the spring force of the second spring 20. , Even if the rigidity of the second spring 20 increases as the temperature rises, the spring force of the first spring 10 is greater than that of the second spring 20.

The first spring 10 elastically supports the diaphragm 12, and a first seating plate 14 is mounted between the first spring 10 and the diaphragm 12.

Inside the second chamber 18, a second seating plate 22 is provided in which the position is changed by the second spring 20.

The first spring 10 is connected to the second spring 20 by a connection rod 26 penetrating through the central hole 24, and one end of the connection rod 26 is the first mounting plate ( 14), and the other end of the connecting rod 26 is connected to the central portion of the second mounting plate 22.

A poppet 34 for adjusting the open area of the flow path 32 is provided inside the lower chamber 2. One end of the poppet 34 is inserted into the flow path 32 to contact the diaphragm 12 on the side of the second space 16, and the other end of the poppet 34 penetrates the operating spring 36 Thus, a certain length is inserted inside the lower stopper 38.

In the following, a method of controlling the pressure of the pressure regulating valve configured as described above will be described.

The pressure control method of the pressure control valve of the present invention,

The step of discharging the gas after the gas is introduced into the second space 16 and pressure is adjusted;

Increasing the internal pressure of the first space 8 due to an increase in the internal temperature of the first space 8;

The step of tensioning the first spring (10) elastically supporting the diaphragm (12) due to an increase in the internal pressure of the first space (8);

Increasing the internal pressure of the second space 16 by the expansion of the diaphragm 12;

Bringing the first space 8 to a certain temperature or higher;

Stretching the first spring 10 to a predetermined length or more;

Increasing the rigidity of the second spring 20 by increasing the temperature of the first space 8;

Stretching the second spring 20 in a direction opposite to that of the first spring 10;

Stopping the tensioning of the first spring 10 by the tensioning of the second spring 20;

Stopping the expansion of the diaphragm 12 by stopping the tension of the first spring 10; And

The process includes a step of maintaining the pressure in the second space 16.

As shown in FIG. 1, before the step of flowing the gas into the second space 16, adjusting the pressure, and then discharging, the internal pressure of the lower chamber 2 and the internal pressure of the upper chamber 4 are It is maintained at atmospheric pressure, and the internal temperature of the first space 8 is maintained at room temperature.

When the internal temperature of the first space 8 is at room temperature, Pr=(F _{first spring} -F _{second spring@room temperature} )/A _diaphragm +Patm, where Pr is the second space 16 Pressure, F _{first spring} is the spring force of the first spring 10, F _{second spring @ room temperature} is the spring force of the second spring 20 at room temperature, A _diaphragm is the area of the diaphragm 12, Patm stands for atmospheric pressure.

At this time, the poppet 34 moves toward the lower end cap 38 by the spring force of the first spring 10 to open the flow path 32.

When the gas is introduced into the lower chamber 2, the gas is introduced into the second space 16 through the flow path 32 and discharged through the outlet 30 after pressure adjustment. At this time, the internal pressure of the first space 8 is at atmospheric pressure.

When an outlet pressure is formed inside the second space 16 by the gas and the outlet pressure acts on the diaphragm 12, the force balance between the first spring 10 and the outlet pressure causes the As the poppet 34 moves toward the second space 16, the flow path 32 is closed.

At this time, when the ambient temperature of the pressure control valve increases, the temperature of the air trapped in the first space 8 and the second chamber 18 increases, and the pressure of the first space 8 also increases. do.

As the internal pressure of the first space 8 increases, the diaphragm 12 expands in a direction that increases the pressure of the second space 16, and the first space ( The outlet pressure of 8) increases. When the diaphragm 12 is expanded, the first spring 10 elastically supporting the diaphragm 12 is also tensioned.

When the internal temperature of the first space 8 rises and reaches a certain temperature or higher, the first spring 10 is also stretched to a certain length or more due to the expansion of the diaphragm 12.

In this case, the internal pressure of the second space 16 is prevented from rising above a predetermined pressure by using the second spring 20.

When the internal temperature of the first space 8 increases and reaches a certain temperature equal to or higher than room temperature, the rigidity of the second spring 20 made of a shape memory alloy material increases.

When the internal temperature of the first space 8 is below a certain temperature, the second spring 20 maintains a compressed state, and when the internal temperature of the first space 8 reaches a certain temperature, the rigidity increases and the It is tensioned in a direction opposite to that of the first spring 10.

The tension of the first spring 10 is stopped due to the tension of the second spring 20, and the expansion of the diaphragm 12 is stopped due to the tension of the first spring 10, and the second space The internal pressure of 16 is maintained.

)/A_{다이어프램}+Patm+P

인 것으로, 여기서, F_{제2스프링,}

는 온도 상승에 의해 증가된 상기 제2스프링(20)의 스프링력, P

는 상기 제1공간(8)의 내부 온도 증가로 인해 증가된 내부 압력을 나타낸다.When the internal temperature of the first space 8 is above a certain temperature, Pr = (F _{first spring} -F _{second spring @ room temperature} -F _{second spring,}

)/A _Diaphragm +Patm+P

As in, where, F _{second spring,}

Is the spring force of the second spring 20 increased by temperature rise, P

Denotes an increased internal pressure due to an increase in the internal temperature of the first space 8.

That is, the internal pressure of the first space 8, which is increased after a point in time when the internal temperature of the first space 8 reaches a certain temperature or higher, is applied to the spring force of the second spring 20 which is increased by the temperature increase. As offset by this, it is possible to extend the operating temperature range of the pressure control valve.

After the step of maintaining the pressure in the second space 16 by the second spring 20 and maintaining the pressure in the second space 16 as described above, the temperature of the first space 8 and When the pressure decreases, the stiffness of the second spring 20 is also reduced, and the diaphragm 12 contracts.

As the diaphragm 12 contracts, the first spring 10 also contracts, thereby reducing the pressure in the second space 16.

When the pressure in the second space 16 decreases, the poppet 34 moves and opens the flow path 32 so that the gas flows into the lower chamber 2 and the second space 16.

In the detailed description of the present invention described above, it has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those of ordinary skill in the relevant technical field, the spirit of the present invention described in the claims to be described later And it will be understood that various modifications and changes can be made to the present invention within a range not departing from the technical field.

2: lower chamber
4: upper chamber
6: first chamber
8: first space
10: first spring
12: diaphragm
14: first seating plate
16: second space
18: second chamber
20: second spring
22: second seating plate
24: central hall
26: connecting rod
28: inlet
30: outlet
32: Euro
34: Poppet
36: spring for operation
38: bottom stopper

Claims (22)

In the hermetically sealed pressure control valve that regulates and discharges the introduced gas to a design pressure,
The second spring prevents the tension of the first spring when the first spring is tensioned, which causes an increase in the outlet pressure as the internal temperature increases,
The pressure control valve,
Divided into a first space and a second space by a diaphragm, the first space includes a first chamber of the first spring and a second chamber of the second spring,
The second space is a space in which the outlet pressure of the gas is adjusted,
The sealed pressure control valve, characterized in that the first space and the second chamber communicate with each other through a central hole to have the same temperature and pressure. delete delete delete The method of claim 1,
The first spring, the second spring, and the central hole are sealed type pressure control valve, characterized in that the coaxial form. The method of claim 1,
The first spring is a closed type pressure control valve, characterized in that elastically supporting the diaphragm. The method of claim 6,
The diaphragm is a sealed pressure control valve, characterized in that the expansion in a direction to increase the pressure of the second space. The method of claim 7,
A sealed pressure control valve, characterized in that a first seating plate is mounted between the diaphragm and the first spring. The method of claim 8,
A closed type pressure control valve, wherein a second seating plate is provided inside the second chamber, the position of which is changed by the second spring. The method of claim 9,
The first spring is a closed type pressure control valve, characterized in that connected to the second spring by a connecting rod penetrating through the central hole. The method of claim 10,
One end of the connection rod is connected to the center of the first mounting plate,
The other end of the connecting rod is a sealed pressure control valve, characterized in that connected to the central portion of the second seating plate. The method of claim 1,
The sealed pressure control valve, characterized in that the internal pressure of the first space is atmospheric pressure at room temperature. The method of claim 12,
When the first space is at room temperature,
Pr=(F _{1st spring} -F _{2nd spring @ room temperature} )/A _Diaphragm +Patm
(Where Pr is the pressure of the second space, F _{first spring} is the spring force of the first spring, F _{second spring @ room temperature} is the spring force of _{the second spring at room} temperature, and A _diaphragm is the area of the diaphragm , Patm is atmospheric pressure)
Sealed pressure control valve, characterized in that. The method of claim 13,
When the first space is above room temperature,
Pr=(F _{1st spring} -F _{2nd spring @ room temperature} -F _{2nd spring,}

)/A _Diaphragm +Patm+P

(Here, F _{second spring,}

Is the spring force of the second spring increased by temperature rise, P

Is the internal pressure increased due to the increase in the internal temperature of the first space)
Sealed pressure control valve, characterized in that. The method of claim 14,
The sealed pressure control valve, characterized in that the spring force of the first spring is greater than the spring force of the second spring. A first chamber in which a first spring is mounted in a first space divided from the second space by a diaphragm; And
Includes; a second chamber in which a second spring is mounted to one side of the first space,
The second space becomes a space in which the outlet pressure of the inlet gas is adjusted,
In the pressure control method of the sealed pressure control valve, characterized in that the first space and the second chamber are communicated by a central hole to have the same temperature and pressure,
Introducing the gas into the second space, adjusting pressure, and then discharging the gas;
Increasing the internal pressure of the first space by increasing the internal temperature of the first space;
Increasing the internal pressure of the second space as the diaphragm expands due to an increase in the internal pressure of the first space;
Making the first space more than a certain temperature;
Stretching the first spring to a predetermined length or more;
Increasing the stiffness of the second spring by increasing the temperature of the first space;
Tensioning the second spring in a direction opposite to that of the first spring;
Stopping tensioning of the first spring due to tensioning of the second spring;
Stopping the expansion of the diaphragm by stopping the tension of the first spring; And
Including; maintaining the pressure in the second space
Pressure control method of a sealed pressure control valve, characterized in that. The method of claim 16,
After the step of maintaining the pressure in the second space.
Reducing the temperature of the first space;
Reducing the pressure in the first space;
Reducing the stiffness of the second spring;
Contracting the first spring while the diaphragm is contracted;
Reducing the pressure in the second space; And
Including; introducing an external gas into the second space
Pressure control method of a sealed pressure control valve, characterized in that. The method of claim 16,
When the temperature of the first space is less than a certain temperature before the pressure of the first space increases according to the temperature increase of the first space, the second spring is in a compressed state. Way. The method of claim 16,
The pressure control method of a closed type pressure control valve, characterized in that the pressure of the first space is atmospheric pressure at room temperature in the step of flowing gas into the second space from the outside and discharging after pressure control. The method of claim 19,
The pressure control method of a closed type pressure control valve, characterized in that the spring force of the first spring is greater than the spring force of the second spring. The method of claim 20,
When the first space is at room temperature,
Pr=(F _{1st spring} -F _{2nd spring @ room temperature} )/A _Diaphragm +Patm
(Where Pr is the pressure of the second space, F _{first spring} is the spring force of the first spring, F _{second spring @ room temperature} is the spring force of _{the second spring at room} temperature, and A _diaphragm is the area of the diaphragm , Patm is atmospheric pressure)
Pressure control method of a sealed pressure control valve, characterized in that. The method of claim 20,
When the first space is above room temperature,
Pr=(F _{1st spring} -F _{2nd spring @ room temperature} -F _{2nd spring,}

)/A _Diaphragm +Patm+P

(Here, F _{second spring,}

Is the spring force of the second spring increased by temperature rise, P

Is the internal pressure increased due to the increase in the internal temperature of the first space)
Pressure control method of a sealed pressure control valve, characterized in that.

Images