JPH07260038A - Gas pressure type valve driving device - Google Patents

Abstract

PURPOSE:To use a gas pressure type valve drive device even if a gas leakage failure occurs by forming a first orifice between a two-way-solenoid valve and a confluent point of two drive lines, and forming a second orifice having a diameter larger than that of the first orifice between an emergency solenoid valve and the confluent point. CONSTITUTION:In the case where a gas leakage failure occurs in a two-way solenoid valve 1, an emergency solenoid valve 2 is opened so as to supply gas through an emergency driving line 6. At this time, part of gas flowing through an orifice 8 flows to the solenoid valve 1 through another orifice 7 and flows back in the valve 1, to be thus discharged through an exhaust pipe 4. A flow rate of the gas is small because a diameter of the orifice 7 is smaller than that of the orifice 8. Accordingly, a gas pressure to be transmitted to a sealed chamber 3X is sufficiently increased, wherein a gas pressure closing type drive valve 3 can be closingly driven. Namely, even if any failure may occur in the solenoid valve 1 of a normal drive line, closing drive can be carried out by supplying gas through the emergency drive line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas pressure type valve drive device used for machine products.

[0002]

2. Description of the Related Art FIG. 3 is a system diagram of a gas pressure type valve drive system used in a rocket and its ground combustion test system.
In the figure, 3 is a gas pressure closed type drive valve for driving a target device not shown, 3X is a closed chamber provided at the end of the drive valve, 21 is a gas supply pipe, 1 is the same pipe It is a continuous two-way solenoid valve that is closed when not excited. 4 is an exhaust pipe connected to the same solenoid valve, 22 is a gas pressure transmission pipe connected to the solenoid valve 1 and reaching the closed chamber 3X of the drive valve 3, 5 is the gas supply pipe 21, solenoid valve 1, exhaust pipe 4 , And the gas pressure transmission pipe 22 are valve closing drive lines for normal time.

Reference numeral 23 is a gas supply pipe different from the above, 2
Is an emergency solenoid valve connected to the supply pipe, and is a solenoid valve that is closed when not excited. The other end of the solenoid valve is the gas pressure transmission pipe 22.
It is connected by a pipe that joins. 24 is the confluence. Reference numeral 6 denotes an emergency valve closing drive line composed of the gas supply pipe 23, the solenoid valve 2, and the merging connection pipe. This is a redundant drive line used when the solenoid valve 1 fails. In the above device, when the drive valve 3 is to be driven to be closed, normally, the electromagnetic valve 1 is opened with the emergency electromagnetic valve 2 being closed,
Gas is supplied to the closed chamber 3X of the drive valve 3 via the gas pressure transmission pipe 22, and the valve is driven to close the drive valve 3. The exhaust pipe 4 is a pipe for discharging gas when adjusting the pressure of gas to be transmitted.

When the solenoid valve 1 fails and cannot be operated because it remains closed, the emergency solenoid valve 2 is opened and the gas supplied from the gas supply pipe 23 is supplied to the closed chamber 3X of the drive valve 3. To drive the drive valve 3 to close. The gas pressure is adjusted by causing the gas to flow backward through a part of the solenoid valve 1 and exhaust the gas through the exhaust pipe 4 of the solenoid valve 1.

[0005]

In the conventional valve drive system shown in FIG. 3, when a gas leak occurs due to a failure of the solenoid valve 1, the gas is supplied from the emergency line 6. Even if the emergency solenoid valve 2 is opened, if the amount of gas leaked from the exhaust pipe 4 is large, it is not possible to transmit a sufficient gas pressure to the sealed chamber 3X, and therefore the drive valve 3 can be driven to close. become unable.

The present invention is intended to solve the above-mentioned drawbacks of the prior art and to provide a valve drive device that can be used even when the electromagnetic valve 1 for normal use has a gas leakage failure.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above problems and relates to a gas pressure valve drive device having the following features.

(1) A valve closing drive line for normal operation in which a gas supply pipe, a two-way solenoid valve with an exhaust pipe that is closed when not excited, and a gas pressure transmission pipe are connected, and a gas supply pipe different from the above and an emergency An emergency valve closing drive line that connects a solenoid valve for time and a pipe that joins the gas pressure transmitting tube, and drives the gas pressure closing type drive valve to which the other end of the gas pressure transmitting tube is connected. In the gas pressure valve drive device, a first orifice is provided between the two-way solenoid valve and the confluence of both lines, and the first orifice is larger than the orifice between the emergency solenoid valve and the confluence. A second orifice having a diameter is provided.

(2) A valve closing drive line for normal use, which connects one end of a four-way solenoid valve with a gas supply pipe and an exhaust pipe and a first gas pressure transmission pipe, a gas supply pipe different from the above and a solenoid for emergency use Emergency valve closing drive line that connects a valve and a pipe that joins the first gas pressure transmission pipe, and a normal opening that connects the other end of the four-way solenoid valve and the second gas pressure transmission pipe Valve drive line,
And an emergency valve opening release line in which a pipe branched from the second gas pressure transmitting tube and an electromagnetic valve for emergency valve opening releasing with an exhaust pipe are connected, and the first and second gas pressure transmitting tubes are connected. In a gas pressure type valve drive device for driving to open and close a gas pressure open / close type drive valve to which each other end is connected, a first one is provided between the four-way solenoid valve and a line confluence point on the first gas pressure transmission pipe. Is provided, and a second orifice having a larger diameter than the first orifice is provided between the emergency solenoid valve and the confluence point, and the four-way solenoid valve and the second gas pressure transmission pipe are further provided. A third orifice is provided between the line branch point and the upper line branch point, and a fourth orifice having a larger diameter than the third orifice is provided between the branch point and the emergency open valve release solenoid valve. .

[0010]

In the means of the above item (1), the valve closing drive when the two-way solenoid valve remains closed and cannot be operated is the same as the conventional one. When a gas leakage failure occurs in the two-way solenoid valve, the emergency solenoid valve is opened to supply gas. At this time,
A part of the gas flowing in through the second orifice flows through the first orifice to the two-way solenoid valve, flows backward through the valve and is discharged from the exhaust pipe, but the first orifice is the second
Since the diameter is smaller than that of the orifice, the backflow gas amount is small, the gas pressure transmitted to the drive valve is sufficiently high, and the drive valve can be closed.

In the means of the above item (2), when gas leakage occurs in the four-way solenoid valve, the gas pressure for closing the valve can be transmitted from the valve closing drive line as described above. At the same time, it is necessary to discharge the gas from the valve opening drive line. Therefore, at the same time as opening the emergency solenoid valve that supplies the valve closing gas, the solenoid valve for opening the emergency valve is opened. At this time, since the fourth orifice has a larger diameter than the third orifice,
A larger amount of gas than the gas that flows backward through the valve-opening drive line at normal times is discharged through the valve-opening release solenoid valve, and the drive valve can be closed.

[0012]

FIG. 1 is a system diagram of a gas pressure valve drive system according to a first embodiment of the present invention. In the figure, 7 is a first orifice provided between the solenoid valve 1 of the normal time valve closing drive line 5 and the confluence 24, and 8 is an emergency valve closing drive line 6
Is a second orifice having a larger diameter than the orifice 7 provided between the emergency solenoid valve 2 and the confluence point 24.
The parts other than the above are the same as those in the conventional technique shown in FIG.

In this apparatus, when the solenoid valve 1 remains closed and cannot be operated, and the gas supply to the normal-time valve closing drive line 5 is stopped, the emergency solenoid valve 2 is opened and the emergency solenoid valve 2 is opened. The gas is supplied from the driving line 6 for driving. In this case, since the gas pressure can be supplied to the closed chamber 3X as in the conventional technique, the gas pressure closing type drive valve 3 can be closed.

When the solenoid valve 1 has a gas leakage failure, the emergency solenoid valve 2 is opened and gas is supplied from the emergency drive line 6 as described above. At this time, a part of the gas flowing through the orifice 8 flows to the solenoid valve 1 through the orifice 7 and flows backward through the valve to be exhausted from the exhaust pipe 4, but the flow rate of the gas is smaller in the orifice 7 than in the orifice 8. Since there is a small amount, the gas pressure transmitted to the closed chamber 3X becomes sufficiently high, and in this case as well, the gas pressure closing type drive valve 3
Can be closed. That is, it is possible to drive the drive valve 3 to be closed by supplying gas from the emergency drive line regardless of any failure of the solenoid valve 1 of the normal drive line.

FIG. 2 is a system diagram of a gas pressure valve drive system according to a second embodiment of the present invention. In the first embodiment, the drive valve 3 is of a type that is closed only by gas pressure, but the drive valve of this embodiment is a type that is not only closed by gas pressure but also opened. . 3 in the figure
A is a gas pressure open / close type drive valve, and 5 and 6 are the same normal and emergency closing valve drive lines as in the previous embodiment. However, 1A is a four-way solenoid valve unlike the conventional one. 3X is a closed chamber for driving the drive valve 3A to close, and 3Y is a closed chamber for driving the drive valve to open. Reference numeral 12 is a valve opening drive line for normal operation, which is connected to the four-way solenoid valve 1A and reaches the closed chamber 3Y of the drive valve 3A.
Reference numeral 25 is the gas pressure transmission pipe, 13 is an emergency valve opening release line branched from the gas pressure transmission pipe 25, 26 is the branch point, and 10 is the four-way solenoid valve 1A of the valve opening drive line and the branch point. A third orifice 9 provided between 25 and 25 is an emergency valve opening release solenoid valve provided in the valve opening release line 13, and is a solenoid valve which is closed when not excited. Reference numeral 11 is a fourth orifice provided between the branch point 26 and the solenoid valve 9 and having a larger diameter than the orifice 10.

In the present apparatus, when it is desired to close the drive valve 3A at normal time, the gas is sent from the four-way solenoid valve 1A to the closed chamber 3X via the valve closing drive line 5 and the gas in the valve opening drive line 12 is supplied. Discharge from the exhaust pipe 4. At this time, the emergency solenoid valves 2 and 9 are closed.

When it is desired to open the drive valve 3A at normal times, the gas is sent from the four-way solenoid valve 1A to the closed chamber 3Y via the valve open drive line 12, and the gas in the valve close drive line 5 is discharged from the exhaust pipe 4. Discharge. At this time also, the electromagnetic valves 2 and 9 for emergency are kept closed.

Next, when the solenoid valve 1A fails and the valve closing drive line 5 becomes exhausted, the emergency solenoid valve 2 is opened and gas is supplied from the emergency valve closing drive line 6.
At this time, a part of the gas flowing through the orifice 8 flows backward through the solenoid valve 1A through the orifice 7.
Since the diameter of is smaller than the diameter of the orifice 8, the flow rate is small, so that a sufficiently high gas pressure can be transmitted to the sealed chamber 3X.

The above process is the same as that of the first embodiment (FIG. 1), but in the present embodiment, other than this, the valve opening drive line 1 is used.
It is necessary to discharge 2 gases. Therefore, when the solenoid valve 2 is opened, the solenoid valve 9 is simultaneously opened, and the gas in the line 12 is discharged from the emergency valve opening release line 13. At this time, the balance of the gas exhaust of the line 12 is adjusted by the difference in diameter between the orifice 11 and the orifice 10. As described above, when a gas leak failure occurs in the solenoid valve 1A, the drive valve 3A can be surely closed by simultaneously opening the solenoid valves 2 and 9.

[0020]

In the gas pressure type valve closing drive system of the present invention, the first orifice is provided between the two-way solenoid valve and the confluence of both lines, and the emergency solenoid valve and the confluence are provided. A second orifice having a larger diameter than the above orifice is provided between the two, and in the gas pressure type valve opening / closing drive device, between the four-way solenoid valve and the line confluence point on the first gas pressure transmission pipe. Is provided with a first orifice, a second orifice having a diameter larger than that of the first orifice is provided between the emergency solenoid valve and the confluence, and the four-way solenoid valve and the second gas pressure are further provided. A third orifice is provided between the line branch point and the line branch point on the transmission pipe, and a fourth orifice having a larger diameter than the third orifice is provided between the branch point and the emergency valve opening release solenoid valve. Therefore, normally closed two-way valve or four-way valve Not only when it is moving impossible, even when the resulting gas leakage fault, it is possible to perform the closing operation of the valve.

[Brief description of drawings]

FIG. 1 is a system diagram of a gas pressure valve drive device according to a first embodiment of the present invention.

FIG. 2 is a system diagram of a gas pressure valve drive device according to a second embodiment of the present invention.

FIG. 3 is a system diagram of a conventional gas pressure valve drive device.

[Explanation of symbols]

1 Solenoid Valve 1A Four-way Solenoid Valve 2 Emergency Solenoid Valve 3 Gas Pressure Closed Type Drive Valve 3A Gas Pressure Open / Close Type Drive Valve 4 Exhaust Pipe 5 Normal Time Closed Valve Drive Line 6 Emergency Closed Valve Drive Line 7 1st Orifice 8 Second orifice (larger diameter than orifice 7) 9 Solenoid valve for emergency valve opening release 10 Third orifice 11 Fourth orifice (larger diameter than orifice 10) 12 Open valve drive line for normal operation 13 Emergency Open valve release line 21 Gas supply pipe 22 Gas pressure transfer pipe 23 Gas supply pipe 24 Confluence point 25 Gas pressure transfer pipe 26 Branch point

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuo Namikawa 10 Oemachi, Minato-ku, Nagoya City Mitsubishi Heavy Industries Ltd. Nagoya Aerospace Systems Works

Claims (2)

[Claims] 1. A normal-time valve closing drive line that connects a gas supply pipe, a two-way electromagnetic valve with an exhaust pipe that is closed when not excited, and a gas pressure transmission pipe, and a gas supply pipe different from the above and an emergency. An electromagnetic closing valve drive line that connects a solenoid valve for operation and a pipe that joins the gas pressure transmission pipe, and drives to close a gas pressure closing type drive valve to which the other end of the gas pressure transmission pipe is connected. In the gas pressure valve drive device, a first orifice is provided between the two-way solenoid valve and the confluence of both lines, and a diameter larger than the orifice is provided between the emergency solenoid valve and the confluence. And a second orifice of the gas pressure type valve drive device. 2. A normal-time valve closing drive line connecting one end of a four-way solenoid valve with a gas supply pipe and an exhaust pipe to a first gas pressure transmission pipe, a gas supply pipe different from the above and a solenoid valve for emergency use. And an emergency valve closing drive line that connects the pipes that join the first gas pressure transfer pipe, and an open valve for normal operation that connects the other end of the four-way solenoid valve and the second gas pressure transfer pipe. The first and second gas pressures are composed of a drive line and an emergency valve release line in which a pipe branched from the second gas pressure transmission pipe and an electromagnetic valve for exhaust valve emergency release with an exhaust pipe are connected. In a gas pressure type valve drive device for driving to open and close a gas pressure open / close type drive valve to which each other end of the transmission pipe is connected, between the four-way solenoid valve and the line confluence point on the first gas pressure transmission pipe. A first orifice is provided in the first orifice, and a first orifice is provided between the emergency solenoid valve and the confluence. A second orifice having a diameter larger than that of the Liffus is provided, and further, a third orifice is provided between the four-way solenoid valve and the line branch point on the second gas pressure transmission pipe, and the branch point and the emergency A gas pressure type valve drive device characterized in that a fourth orifice having a larger diameter than the third orifice is provided between the solenoid valve for temporarily opening the valve and the third orifice.