JP3353389B2 - Acceleration sensitive pressure control valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acceleration-responsive pressure regulating valve which can regulate the pressure of a gas supplied to a supply target according to the magnitude and rate of increase of acceleration (G).

[0002]

2. Description of the Related Art In recent years, due to the sophistication of aircraft, pilots have been exposed to large accelerations and have lost consciousness.
There are cases where losing spatial awareness leads to accidents.

In order to prevent such an accident, the bladder is inflated in accordance with the magnitude of the acceleration, and the body is tightened to prevent the pilot from losing consciousness. By expanding the bladder built in the pilot's seat or expanding the pneumatic cylinder, a device was developed to prevent the pilot's body from being pressed in the direction corresponding to the flight attitude and losing spatial sense. ing.

Conventionally, as shown in FIG. 4, an acceleration-sensitive pressure adjusting valve for adjusting the gas pressure supplied to such a bladder or the like according to the magnitude of acceleration has been used. The valve has an inlet port 101 connected to a high pressure gas source and an outlet port 103 connected to a bladder 102.
A first poppet 105 for opening and closing the supply path 104 between the two ports 101 and 103; a spring 111 for urging the first poppet 105 in the closing direction of the supply path 104; an exhaust port 106 and the outlet port 103 Exhaust passage 1 between
07, and a weight 109 which is displaced when it receives acceleration. When the acceleration increases, the poppets 105 and 108 open the supply passage 104 and the exhaust passage 107.
When the acceleration decreases, the supply path 104 is closed and the exhaust path 107 is opened.

As a result, when the acceleration increases, the first poppet 105 is displaced in accordance with the downward displacement of the weight 109 in the drawing, so that the high-pressure gas is supplied to the supply passage 10.
4 and is supplied to the bladder 102 from the outlet port 103. When the acceleration decreases, the exhaust path 107 between the outlet port 103 and the exhaust port 106 is opened due to the upward displacement of the weight 109 in the drawing, and the internal pressure of the bladder 102 decreases. . Thereby, the internal pressure of the bladder 102 is controlled so as to be a pressure corresponding to the acceleration.

[0006]

In the above-mentioned conventional configuration,
When the acceleration increases sharply and the acceleration increase rate increases, the response delay of the internal pressure rise in the supply target such as the bladder 102 to the acceleration increase increases, and the internal pressure of the supply target is quickly controlled according to the acceleration. There is a problem that can not be.

An object of the present invention is to provide an acceleration-sensitive pressure regulating valve which can solve the above-mentioned problems of the prior art.

[0008]

SUMMARY OF THE INVENTION The present invention provides an inlet port connected to a high pressure gas source, an outlet port connected to a high pressure gas supply, an exhaust port for high pressure gas, and a displacement port corresponding to acceleration. An acceleration-responsive mechanism that opens and closes a supply path between the inlet port and the outlet port and an exhaust path between the exhaust port and the outlet port by a poppet that is displaced in conjunction with the weight. In the mold pressure control valve, a pressure receiving portion that is linked to the poppet is provided, and a means for applying a gas having a pressure corresponding to the acceleration increasing rate to the pressure receiving portion is provided, and the pressure receiving portion has a pressure corresponding to the acceleration increasing rate. The means for applying gas is an auxiliary weight that is displaced in accordance with acceleration, a valve that is displaced by the action of gas pressure that changes in accordance with the displacement of the auxiliary weight,
A bypass pipe which is opened and closed by the displacement of the valve, wherein a gas having a pressure corresponding to an acceleration increasing rate is caused to act on the pressure receiving portion from the high-pressure gas source by the bypass pipe.

[0009]

According to the structure of the present invention, when the acceleration is increased, the supply path is opened by the poppet and the exhaust path is closed, and the high-pressure gas is supplied from the inlet port to the supply object through the supply path and the outlet port. . When the acceleration decreases, the supply path is closed and the exhaust path is opened by the poppet, and gas is exhausted from the supply target through the outlet port, the exhaust path, and the exhaust port.

When the high-pressure gas is supplied to the object to be supplied, if the acceleration increases rapidly and the rate of increase in acceleration increases, the gas pressure acting on the pressure receiving section increases in accordance with the rate of acceleration increase. The amount of movement of the linked poppet in the opening direction of the supply path increases. That is, as the acceleration increase rate increases, the degree of opening of the high-pressure gas supply path increases, and the internal pressure of the supply target can be rapidly increased.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

An acceleration-resistant suit device 1 for an aircraft shown in FIG.
A bladder 3 (supplied body) is attached to the inside of a pants-like suit body 2, and high-pressure gas is supplied to the bladder 3 from a high-pressure gas source 4 via an acceleration-sensitive pressure control valve 5. Supplied.

The pressure adjusting valve 5 adjusts the gas pressure supplied to the bladder 3 according to the magnitude of the acceleration. That is, as the acceleration increases, the bladder 3 is inflated to tighten the lower body of the pilot, preventing blood from staying in the lower body, maintaining blood circulation to the brain, and preventing the pilot from becoming unconscious. I do.

As shown in FIG. 1, the pressure control valve 5 includes a housing 6, a first poppet 7, a second poppet 8, and a weight 9 built in the housing 6.

The high pressure gas source 4 is provided in the housing 6.
Port 10 connected to the bladder 3 via a pipe 29 and an outlet port 11 connected to the bladder 3 via a pipe 30
And an exhaust port 12 that is open to the atmosphere. As the high-pressure gas source 4, for example, an engine bleed air of an aircraft is used.

A wall 13 is formed in the housing 6 to partition between the inlet port 10 and the outlet port 11, and an intake opening 14 formed in the partition wall 13 has
The first poppet 7 is opened and closed by a flange 7a formed at the lower end. That is, the intake opening 14 is opened by the downward movement of the first poppet 7 as shown in FIG. 2, whereby the supply path of the high-pressure gas from the inlet port 10 to the outlet port 11 is opened. Become.

A compression coil spring 15 is interposed between the flange 7a of the first poppet 7 and the inner surface of the housing 6. The first poppet 7 is pressed by the elastic force of the spring 15 so as to close the supply opening 14. A bellows 16 is provided around the spring 15, and the bellows 16 allows a spring storage chamber 15 a formed below the first poppet 7 in the figure to be connected to the inlet port 10.
Is kept airtight. The flange 7a of the first poppet 7 is formed with a communication hole 17 that communicates between the storage chamber 15a and the outlet port 11.

A flange 7b is provided at the upper end of the first poppet 7 in the drawing, and a diaphragm 20 is provided between the outer periphery of the flange 7b and the inner periphery of the housing 6. The diaphragm 20 is provided so as to hermetically close the space between the outlet port 11 and the exhaust port 12. Further, an exhaust hole 18 for communicating the outlet port 11 and the exhaust port 12 is formed in the flange 7b.

A flange 8b is formed at the lower end of the second poppet 8 in the figure, and the flange 8b is arranged above the first poppet 7 in the figure. A cylindrical extension 7c is integrally formed upward from the flange 7b of the first poppet 7 in the figure. Thereby, when the second poppet 8 is displaced downward in the figure, as shown in FIG.
The flange 8b and the extending portion 7c abut, and the exhaust path from the outlet port 11 to the exhaust port 12 through the exhaust hole 18 is closed.

The upper end of the second poppet 8 is
From above, the weight 9
Are connected. The weight 9 moves downward in the figure as the acceleration increases, and moves upward in the figure as the acceleration decreases. A compression coil spring 19 for urging the weight 9 upward in the figure is provided between the weight 9 and the housing 6.

A pressure receiving portion is provided in conjunction with the second poppet 8. That is, the second flange 21 is provided above the flange 8 b of the second poppet 8. The partition wall 2 is located between the flanges 21 and 8b of the second poppet 8.
3 are provided. In addition, a diaphragm 22 is provided between the outer periphery of the second flange 21 and the inner periphery of the housing 6. Thus, closed spaces 24a and 24b are formed above and below the second flange 21 in the drawing, respectively. The upper closed space 24a in the figure is opened to the atmosphere through an exhaust port 41 in which a throttle portion 40 is formed, and the lower closed space 24b in the figure is opened to the atmosphere through an exhaust port 42. As a result, the differential pressure between the air pressure in the upper closed space 24a in the figure and the air pressure in the lower closed space 24b in the figure acts on the second flange 21 and the diaphragm 22, and the second pressure is changed according to the differential pressure. The two poppet 8 is displaced. That is, the second flange 21 and the diaphragm 2
2 is a pressure receiving portion.

The pressure receiving portions 21 and 22 are provided with means for applying gas having a pressure corresponding to the acceleration increasing rate.
That is, the closed space 24a on the upper side in the figure and the high-pressure gas source 4 are connected by a bypass pipe 31, and an auxiliary weight 51 is provided in a weight chamber 50 communicating with the bypass pipe 31. 3
1 is provided.

The auxiliary weight 51 moves downward in the figure due to an increase in acceleration, and moves upward in the figure due to a decrease in acceleration. As shown in FIG. The opening degree of the air passage 55 with the chamber 50 is increased. A compression coil spring 56 for urging the auxiliary weight 51 upward in the drawing is provided between the auxiliary weight 51 and the weight chamber 50.
Is provided. Also, the weight chamber 50
Is opened to the atmosphere through an exhaust port 58 in which a throttle portion 57 is formed.

The auxiliary valve 52 is connected to the bypass pipe 31
The valve body 6 is disposed so as to be movable in the vertical direction in the figure.
0 and a valve rod 61 connected to the valve body 60
And an acceleration change rate detection chamber 62 that covers the valve rod 61 outside the bypass pipe 31. The valve body 60 closes a bypass flow path between the valve body 31a and the valve seat 31a by being located on the lower side in the figure as shown in FIG. 1, and displaces upward as shown in FIG. The degree of opening of the bypass passage is increased. A partition block 64 is provided in the acceleration change rate detection chamber 62, and a diaphragm 69 is formed between the partition block 64, an outer flange 63 of the valve rod 61, and an inner circumference of the chamber 62. The interior of the chamber 62 is partitioned to form closed spaces 62a and 62b at the upper and lower sides in the figure, respectively.
The upper closed space 62a in FIG.
1 with a throttle 65 between the inner wall 4 and the inner periphery of the chamber 62
The weight chamber 50 communicates with the weight chamber 50 via a gas introduction path 66, and a closed space 62 b below in the figure is formed through a second gas introduction path 67 between the partition block 64 and the inner periphery of the chamber 62. Communicate with
A compression coil spring 68 is disposed between the inner circumference of the chamber 62 and the flange 63 in the upper closed space 62a in the figure, and urges the valve body 60 downward in the figure.

According to the above configuration, when the acceleration increases,
The weight 9 moves downward against the elastic force of the spring 19 in FIG. 1, and the second poppet 8 moves downward together with the weight 9. Then, the flange 8b of the second poppet 8
Abuts on the extension 7c formed in the first poppet 7 and closes the exhaust path between the outlet port 11 and the discharge port 12. Further, the second poppet 8 connects the first poppet 7 with the spring 1.
5, the intake port 14 is opened, and the supply path between the inlet port 10 and the outlet port 11 is opened, as shown in FIG. Thereby, the high-pressure air supplied from the high-pressure gas source 4 is supplied to the bladder 3 from the inlet port 10 through the supply path and from the outlet port 11 through the pipe 30. When the acceleration decreases, the weight 9
The second poppet 8 moves upward in the figure because the force due to the acceleration acting on the second poppet 8 decreases. Then, as shown in FIG. 1, an exhaust passage extending from the outlet port 11 to the exhaust port 12 via the exhaust hole 18 is opened, and the high-pressure air inside the bladder 3 flows through the pipe 30, the outlet port 11, the exhaust hole 18, and the exhaust port. The air is exhausted to the atmosphere through the air. Thereby, the internal pressure of the bladder 3 is controlled to be a pressure corresponding to the acceleration.

When the high pressure gas is supplied to the bladder 3 by the increase in the acceleration, the auxiliary weight 51 is increased by the increase in the acceleration.
Is displaced downward in the drawing, high-pressure air reaches the acceleration change rate detection chamber 62 from the bypass pipe 31 via the weight chamber 50. The high-pressure air is introduced into the closed space 62a above the acceleration change rate detection chamber 62 in the drawing via the throttle portion 65 and is introduced without being throttled into the closed space 62b below the drawing. As the increase is more rapid and the acceleration increase rate is larger, the internal pressure rise in the closed space 62a above it is delayed more than the internal pressure rise in the lower closed space 62b. Thereby, the upper and lower closed spaces 62a,
The internal pressure at 62b has a difference corresponding to the acceleration increasing rate, and the valve main body 60 is pushed up according to the pressure difference to increase the opening degree of the bypass flow passage in the bypass pipe 31. Then, a high-pressure gas having a pressure corresponding to the acceleration increasing rate acts on the pressure receiving parts 21 and 22, and the amount of movement of the first and second poppets 7 and 8 linked to the pressure receiving parts 21 and 22 in the opening direction of the supply path. Becomes larger. That is, as the acceleration increase rate increases, the degree of opening of the high-pressure air supply path increases, and the internal pressure of the bladder 3 can be rapidly increased.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the present invention is applied to the acceleration-resistant suit device. The present invention can also be applied to a space sickness prevention device that prevents the user from falling into space sickness by pressing from a different direction. In the above embodiment, the high-pressure gas source 4 is connected directly to the inlet port 10.
However, a regulator for pre-regulating pressure may be interposed between the high-pressure gas source and the inlet port.

[0028]

According to the acceleration-sensitive pressure regulating valve of the present invention, the delay of the response of the increase in the internal pressure of the supply to the increase in acceleration can be reduced, and the internal pressure of the supply can be quickly controlled in accordance with the acceleration.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an acceleration-sensitive pressure regulating valve according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an acceleration-sensitive pressure regulating valve according to an embodiment of the present invention.

FIG. 3 is a configuration explanatory view of an acceleration-resistant suit device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of an acceleration-sensitive pressure regulating valve according to a conventional example.

[Explanation of symbols]

 Reference Signs List 3 bladder 4 high-pressure gas source 5 acceleration-responsive pressure control valve 7 first poppet 8 second poppet 9 weight 10 inlet port 11 outlet port 12 exhaust port 21, 22 pressure receiving part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-232195 (JP, A) JP-A-4-218495 (JP, A) JP-A-4-38300 (JP, A) 106099 (JP, U) Japanese Utility Model Application Hei 4-101109 (JP, U) Japanese Patent Publication No. 37-4491 (JP, B1) US Patent 5,170,814 (US, A) US Patent 2,952,264 (US, A) (58) (Int.Cl. ⁷ , DB name) B64D 10/00 B64D 11/00 B64D 13/00 A62B 9/00 F16K 17/36

Claims (1)

(57) [Claims] An inlet port connected to a high-pressure gas source, an outlet port connected to a high-pressure gas supply, an exhaust port for high-pressure gas, and a weight that is displaced in accordance with acceleration. An acceleration-responsive pressure regulating valve in which a supply path between the inlet port and the outlet port and an exhaust path between the exhaust port and the outlet port are opened and closed by a poppet displaced in conjunction with A pressure receiving portion is provided in conjunction with the pressure receiving portion, and a means for applying a gas having a pressure corresponding to the acceleration increasing rate to the pressure receiving portion is provided. A means for applying a gas having a pressure corresponding to the acceleration increasing rate to the pressure receiving portion comprises an acceleration Weight which changes according to the displacement, a valve which changes by the action of gas pressure which changes according to the change of the weight, and a bypass pipe which is opened and closed by the displacement of the valve The a, acceleration sensitive pressure regulating valve, characterized in that the action of gas pressure corresponding to jerk the pressure receiving portion from the high pressure gas source through the bypass pipe.