JPH06340295A - Acceleration sensitive type pressure control valve - Google Patents

Abstract

PURPOSE:To quickly control the internal pressure corresponding to acceleration in a supplied body by providing a weight displaced according to the acceleration and a poppet interlocked with the weight so that a supply path between an exhaust port and outlet port and an exhaust path between the exhaust port and outlet port are opened and closed. CONSTITUTION:A weight 9 displaced according to acceleration and poppets 7, 8 interlocked with the weight are provided. A supply path between an inlet port 10 connected to a high pressure gas source 4 by poppets 7, 8 and an outlet port 11 connected to a body 3 supplied with high pressure gas is opened, and an exhaust path between an exhaust port 12 and the outlet port 11 is closed in the increase of acceleration. In the reduction of acceleration, the action of opening and closing the inlet and outlet ports are inversed. In the supply of high pressure gas to the supplied body, the gas pressure acting on pressure receiving parts 21, 22 is increased in proportion to the increase of an acceleration increasing rate to enlarge the opening of the supply paths of the poppets 7, 8 interlocked with the pressure receiving parts 21, 22, so that the internal pressure in the supplied body is quickly increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acceleration-sensitive pressure control valve capable of adjusting the pressure of 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 advanced functions of aircraft, the pilot is exposed to large acceleration and loses consciousness.
There are cases where loss of spatial perception leads to an accident.

In order to prevent such accidents, the bladder is inflated according to the magnitude of acceleration to prevent the pilot from falling into unconsciousness by tightening the body of the pilot. By inflating the bladder built into the pilot's seat or extending the pneumatic cylinder, a device etc. was developed to prevent the pilot's body from being pressed from the direction according to the flight attitude and losing spatial perception. ing.

Conventionally, the one shown in FIG. 4 has been used as an acceleration sensitive pressure control valve for controlling the gas pressure supplied to such a bladder according to the magnitude of acceleration. This 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 that opens and closes a supply path 104 between the ports 101 and 103, a spring 111 that biases the first poppet 105 in the closing direction of the supply path 104, an exhaust port 106, and the outlet port 103. Exhaust path 1 between
A second poppet 108 that opens and closes 07, and a weight 109 that is displaced when subjected to acceleration are provided. The poppets 105 and 108 on the weight 109 open the supply passage 104 as the acceleration increases, and the exhaust passage 107.
Are closed, and when the acceleration decreases, the supply passage 104 is closed and the exhaust passage 107 is opened.

As a result, when the acceleration becomes large, the first poppet 105 is displaced along with the downward displacement of the weight 109 in the figure, whereby the high pressure gas is supplied to the supply passage 10.
4 through the outlet port 103 to the bladder 102. Further, when the acceleration becomes small, the weight 109 is displaced upward in the figure, and the exhaust passage 107 between the outlet port 103 and the exhaust port 106 is opened, so that the internal pressure of the bladder 102 is reduced. . As a result, the internal pressure of the bladder 102 is controlled to be a pressure according to the acceleration.

[0006]

SUMMARY OF THE INVENTION In the above conventional configuration,
When the acceleration rapidly increases and the rate of increase in acceleration increases, the delay in the response of the internal pressure increase in the supply target such as the bladder 102 to the increase in the acceleration increases, and the internal pressure of the supply target is quickly controlled according to the acceleration. There is a problem that you cannot do it.

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

[0008]

According to the present invention, an inlet port connected to a high-pressure gas source, an outlet port connected to a high-pressure gas supply target, an exhaust port for high-pressure gas, and displacement according to acceleration are provided. And a discharge 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 that is displaced in conjunction with the weight. The mold pressure control valve is characterized in that a pressure receiving portion interlocked with the poppet is provided, and means for causing a gas having a pressure corresponding to an acceleration increase rate to act on the pressure receiving portion is provided.

[0009]

According to the structure of the present invention, when the acceleration increases, the poppet opens the supply passage and closes the exhaust passage, so that high-pressure gas is supplied from the inlet port to the supply target through the supply passage and the outlet port. . Further, when the acceleration decreases, the supply path is closed and the exhaust path is opened by the poppet, and the gas is exhausted from the supply target body through the outlet port, the exhaust path, and the exhaust port.

When the high-pressure gas is supplied to the supply target and the acceleration increases rapidly and the acceleration increase rate increases, the gas pressure acting on the pressure receiving portion increases in accordance with the acceleration increase rate, and the pressure receiving portion receives the gas pressure. The movement amount of the interlocking poppet in the opening direction of the supply path increases. That is, when the rate of increase in acceleration increases, the opening degree 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.

The aircraft acceleration-resistant suit device 1 shown in FIG.
Is a bladder 3 (supplied body) attached to the inside of a trouser-like suit body 2, to which high pressure gas from a high pressure gas source 4 passes through 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 acceleration. That is, as the acceleration increases, the bladder 3 expands to tighten the lower body of the pilot, prevent blood from staying in the lower body, maintain blood circulation to the brain, and prevent the pilot from losing consciousness. To do.

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

In the housing 6, the high pressure gas source 4 is provided.
An inlet 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 open to the atmosphere. As the high-pressure gas source 4, for example, the engine bleed air of an aircraft is used.

A wall 13 for partitioning the inlet port 10 and the outlet port 11 is formed inside the housing 6, and an intake opening 14 formed in the partition wall 13 is formed.
It is opened and closed by a flange 7a formed at the lower end of the first poppet 7. 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 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. Due to the elastic force of the spring 15, the first poppet 7 is pushed so as to close the supply opening 14. Further, a bellows 16 is provided around the spring 15, and by this bellows 16, a spring accommodating chamber 15 a formed below the first poppet 7 in the figure is provided.
It is kept airtight against. Further, 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 figure, and a diaphragm 20 is provided between the outer circumference of the flange 7b and the inner circumference 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. In addition, 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 drawing, and the flange 8b is arranged above the first poppet 7 in the drawing. A cylindrical extending portion 7c is integrally formed from the flange 7b of the first poppet 7 upward in the drawing. As a result, when the second poppet 8 is displaced downward in the figure, as shown in FIG.
The flange 8b comes into contact with the extending portion 7c, and the exhaust path from the outlet port 11 through the exhaust hole 18 to the exhaust port 12 is closed.

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

A pressure receiving portion interlocking with the second poppet 8 is provided. That is, the second flange 21 is provided above the flange 8b of the second poppet 8. The partition wall 2 is provided between the flanges 21 and 8b of the second poppet 8.
3 is provided. A diaphragm 22 is provided between the outer circumference of the second flange 21 and the inner circumference of the housing 6. As a result, closed spaces 24a and 24b are formed above and below the second flange 21 in the figure, respectively. An 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 a 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 atmospheric pressure in the upper closed space 24a in the figure and the atmospheric pressure in the lower closed space 24b in the figure acts on the second flange 21 and the diaphragm 22 to generate a first pressure in accordance with the differential pressure. 2 Poppet 8 is displaced. That is, the second flange 21 and the diaphragm 2
2 is a pressure receiving part.

The pressure receiving portions 21 and 22 are provided with means for causing a gas having a pressure corresponding to the acceleration increase rate to act.
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, an auxiliary weight 51 is provided in a weight chamber 50 communicating with the bypass pipe 31, and the bypass pipe is also provided. Three
An auxiliary valve 52 for opening and closing 1 is provided.

The auxiliary weight 51 is assumed to move downward in the figure due to an increase in acceleration, and move 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 becomes large. 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 open to the atmosphere through an exhaust port 58 in which a narrowed portion 57 is formed.

The auxiliary valve 52 has a bypass pipe 31.
The valve body 6 is arranged in the inside 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. As shown in FIG. 1, the valve body 60 is located on the lower side in the drawing to close the bypass flow path between the valve body 31 and the valve seat 31a, and as shown in FIG. The opening degree of the bypass flow path 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, the flange 63 on the outer circumference of the valve rod 61, and the inner circumference of the chamber 62. By partitioning the inside of the chamber 62, closed spaces 62a and 62b are formed at the upper side and the lower side in the drawing, respectively.
The upper closed space 62a in the figure is the partition block 6
4 with the throttle portion 65 between the inner circumference of the chamber 62 and the inner circumference of the chamber 62
The weight chamber 50 communicates with the weight chamber 50 via a gas introduction path 66, and the lower closed space 62b in the figure has a second gas introduction path 67 between the partition block 64 and the inner circumference of the chamber 62, and the weight chamber 50. Communicate with.
Further, in the upper closed space 62a in the figure, the compression coil spring 68 is arranged between the inner periphery of the chamber 62 and the flange 63, and urges the valve body 60 downward in the figure.

According to the above structure, when the acceleration increases,
The weight 9 moves downward in FIG. 1 against the elastic force of the spring 19, and the second poppet 8 moves downward together with the weight 9. Then, the flange 8b of the second poppet 8
Touches the extending portion 7c formed on the first poppet 7 and closes the exhaust passage between the outlet port 11 and the exhaust port 12. In addition, the second poppet 8 uses the first poppet 7 as the spring 1.
2, the intake opening 14 is opened, and the supply path between the inlet port 10 and the outlet port 11 is opened. As a result, 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 passage and from the outlet port 11 through the pipe 30. If the acceleration decreases, the weight 9
The second poppet 8 moves upward in the figure because the force due to the acceleration that acts on is reduced. Then, as shown in FIG. 1, the exhaust passage 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 is piped 30, the outlet port 11, the exhaust hole 18, and the exhaust port. It is exhausted to the atmosphere through 12. As a result, the internal pressure of the bladder 3 is controlled to be a pressure according to the acceleration.

When the high pressure gas is supplied to the bladder 3 due to the increase in acceleration, the auxiliary weight 51 is increased due to the increase in acceleration.
Is displaced downward in the drawing, the 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 in the upper part of the acceleration change rate detection chamber 62 in the drawing through the throttle portion 65, and is introduced into the closed space 62b in the lower part in the drawing without being throttled. As the rate of increase increases sharply and the rate of increase in acceleration increases, the increase in internal pressure in the closed space 62a above the internal space 62b lags behind the increase in internal pressure in the closed space 62b below. As a result, the upper and lower closed spaces 62a,
A difference according to the acceleration increase rate is generated in the internal pressure at 62b, and the valve main body 60 is pushed up according to the differential pressure, and the opening degree of the bypass flow passage in the bypass pipe 31 is increased. Then, the high-pressure gas having a pressure corresponding to the acceleration increase rate acts on the pressure receiving portions 21 and 22, and the moving amount of the first and second poppets 7 and 8 interlocking with the pressure receiving portions 21 and 22 in the opening direction of the supply path. Grows larger. That is, as the rate of increase in acceleration increases, the opening degree of the high-pressure air supply path increases, and the internal pressure of the bladder 3 can be quickly increased.

The present invention is not limited to the above embodiment. For example, although the present invention is applied to the anti-acceleration suit device in the above embodiment, the bladder built into the pilot's seat is expanded or the pneumatic cylinder is extended according to the magnitude of the acceleration to adjust the pilot to the flight attitude. The present invention can also be applied to a spatial dyscollision prevention device that prevents a person from falling into spatial dyslexia by pressing from the opposite direction. In the above embodiment, the high pressure gas source 4 is directly connected to the inlet port 10.
However, a regulator for preconditioning pressure may be interposed between the high pressure gas source and the inlet port.

[0028]

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

[Brief description of drawings]

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

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

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

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

[Explanation of symbols]

 3 Bladder 4 High Pressure Gas Source 5 Acceleration Sensitive Pressure Control Valve 7 First Poppet 8 Second Poppet 9 Weight 10 Inlet Port 11 Outlet Port 12 Exhaust Ports 21, 22 Pressure Receiving Portion

Claims (1)

[Claims] 1. An inlet port connected to a source of high pressure gas,
An outlet port connected to the supply target of high-pressure gas, an exhaust port of high-pressure gas, and a weight that is displaced in accordance with acceleration, the poppet that is displaced in conjunction with the weight, the inlet port and the outlet port In the acceleration-sensitive pressure regulating valve in which the supply passage between the exhaust port and the exhaust passage between the exhaust port and the outlet port is opened and closed, a pressure receiving portion interlocking with the poppet is provided, and the acceleration increasing rate is provided in the pressure receiving portion. An acceleration-sensitive pressure control valve, characterized in that it is provided with means for causing a gas having a pressure corresponding to the pressure to be applied.