JPH102499A - Earthquake countermeasure type gas supply installation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas supply installation in which structure for stopping a large quantity of gas in a common gas source can be constituted at low cost as well as with low power consumption. SOLUTION: This gas supply installation is so constituted as to supply gas to a plurality of supplied places K through piping from a common gas source 1 provided with a plurality of gas cylinders GB. The common gas source 1 is provided with a main line 3 for supplying a large quantity of gas to the supplied places K, a main switching valve (main cutoff valve) 5 for directly opening/closing the main line 3, a control valve (a driving solenoid valve) for controlling opening/closing of the main switching valve 5, and an earthquake sensor 7 for outputting an earthquake signal upon sensing an earthquake of prescribed seismic intensity. The main switching valve 5 is so constituted as to be closed by the pressure of gas supplied from the control valve, and the control valve supplies gas of prescribed pressure to the main switching valve 5 on the basis of the earthquake signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas supply system configured to supply gas to a plurality of supply destinations through a pipe from a common gas source constituted by a plurality of gas cylinders, and particularly to a measure against earthquake. Related to earthquake-supplied gas supply facilities.

[0002]

2. Description of the Related Art In this type of gas supply equipment, when an earthquake occurs, it is important to immediately stop gas supply from a common gas source to minimize damage caused by the earthquake. For this reason, it is necessary to close the main line of the common gas source simultaneously with the occurrence of the earthquake so that a large amount of gas does not flow to the supply destination.

In order to close the main line as described above, for example, an electromagnetic shut-off valve which is electrically operated is provided in the main line, and when an earthquake is detected by a seismic sensor, the electromagnetic shut-off valve is shut off. The valve may be automatically closed.

[0004]

However, in order to close the main line through which a large amount of gas flows, it is necessary to configure the electromagnetic shut-off valve with a large one. That is, the electromagnetic shut-off valve has a problem that power consumption is large and expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an earthquake which can constitute a structure for stopping a large amount of gas in a common gas source with a low power consumption and an inexpensive structure. The task is to provide a gas supply system that can take measures.

[0006]

Means for Solving the Problems In order to solve the above problems, the invention according to claim 1 comprises a plurality of gas cylinders (GB).
A gas supply facility configured to supply gas from a common gas source (1) provided with a plurality of supply destinations (K) through pipes, wherein the common gas source (1) includes a supply destination (K) A main line (3) for supplying a large amount of gas to the main line, a main on-off valve (5) for directly opening and closing the main line (3),
A control valve (50) for controlling the opening and closing of the main on-off valve and a seismic sensor (7) for emitting an earthquake signal by sensing an earthquake of a predetermined seismic intensity are provided.
The main on-off valve (5) is configured to close by the pressure of gas supplied from the control valve (50), and the control valve (50) supplies a gas of a predetermined pressure to the main valve based on an earthquake signal. It is characterized in that it is configured to supply to the on-off valve (5).

According to a second aspect of the present invention, in the first aspect of the present invention, the main on-off valve (5) guides gas supplied from the control valve (50), and connects the valve body (5e) to the valve seat (5a). ), And has a pilot chamber (5f) for closing the valve seat (5a). The pilot chamber (5f) is connected to the outside air via a throttle (5h). It is characterized by:

According to a third aspect of the present invention, in the first or second aspect, the control valve (50) is
It is constituted by a bidirectional solenoid valve that electrically performs both an opening operation when supplying gas to the main on-off valve (5) and a closing operation when stopping supply of gas to the main on-off valve (5). It is characterized by having.

In the invention according to claim 1,
When an earthquake occurs, a gas of a predetermined pressure flows from the control valve (50) to the main on-off valve (5) based on an earthquake signal issued from the seismic sensor (7), and the main on-off valve (5) closes. Thus, the main line (3) is closed. Therefore, the supply of gas stops at the common gas source (1). That is, the gas can be reliably stopped at the supply source.

Further, even if the control valve (50) is constituted by, for example, an electromagnetic valve, this electromagnetic valve only allows a small amount of gas at a predetermined pressure to flow through the control valve (50).
It can be configured with an extremely small capacity. For this reason, the control valve (50) can be configured with an extremely low power consumption and inexpensive valve.
In addition, since the power consumption of the control valve (50) is extremely small, the control valve (50) can be driven by a battery and the life of the battery can be prolonged.

Further, the main opening / closing valve (5) only needs to have a valve structure for performing only opening / closing, and no components such as solenoids are required. For this reason, even if the main on-off valve (5) is constituted by a large one, it does not become expensive.

Therefore, the structure for stopping a large amount of gas in the common gas source (1) can be configured with low power consumption and low cost.

According to the second aspect of the present invention, since the pilot chamber (5f) in the main opening / closing valve (5) is connected to the outside air through the throttle, the control valve (50).
Is supplied with a gas of a predetermined pressure, the pilot chamber (5f) is also filled with the gas of this pressure. However, when the supply of gas from the control valve (50) is stopped, the gas in the pilot chamber (5f) gradually flows out to the outside air via the throttle (5h). Therefore, the valve element (5e) is connected to the valve seat (5e).
It becomes possible to move away from a). That is, when the pressure from the valve seat (5a) acts, the valve element (5e) is immediately opened from the valve seat (5a).

Therefore, there is an advantage that the main on-off valve (5) can be opened with a simple structure using the throttle (5h).

According to the third aspect of the present invention, since the control valve (50) is constituted by a two-way solenoid valve, the main on-off valve (5) is opened by an electric signal at the time of recovery after an earthquake. It is very convenient. That is, operability can be improved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. 1 to 4 show the first embodiment, FIGS. 5 to 6 show the second embodiment, FIG. 7 shows the third embodiment, FIG. 8 shows the fourth embodiment, and FIGS. FIG. 11 is a sixth embodiment, FIG. 12 is a seventh embodiment, FIG. 13 is an eighth embodiment, and FIG. 14 is a ninth embodiment.
Embodiment, FIG. 15 shows the tenth embodiment, and FIG.
FIG. 17 shows a twelfth embodiment, and FIG. 18 shows a thirteenth embodiment.

First, a first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. As shown in FIG. 1, the anti-earthquake gas supply system shown in the first embodiment supplies gas to a plurality of supply destinations K through a buried pipe 2 from a common gas source 1 having a plurality of gas cylinders GB. The common gas source 1 includes a main line 3 connected to a pipe 2 to a supply destination K, a first branch 3a and a second Branch part 3b
And a main solenoid valve (main valve) provided between the first branch portion 3a and the second branch portion 3b of the main line 3 to open and close the main line 3. 5), a sub solenoid valve (sub valve) 6 provided on the bypass line 4 for opening and closing the bypass line 4, and a seismic sensor 7 for detecting an earthquake of a predetermined seismic intensity and generating an earthquake signal (see FIG. 2). And the main electromagnetic valve 5 and the sub electromagnetic valve 6 are closed based on the earthquake signal.

As shown in FIG. 1, an automatic switching regulator 8 is provided on the upstream side of the main line 3, and a gas cylinder GB is provided on the left and right sides of the automatic switching regulator 8 via pipes 8a and 8b. Are connected. Automatic switching regulator 8
For example, a gas (for example, LP gas) supplied from a gas cylinder GB on the pipe 8a side is reduced to a predetermined pressure (for example, 0.3 to 0.8 kg / c in this embodiment).
m ² ) and supply it to the main line 3. Furthermore, when the gas on the pipe 8a side runs out, the automatic switching regulator 8 automatically switches from the gas on the pipe 8a side to the gas on the pipe 8b side.

As shown in FIG. 2, in the main solenoid valve 5, the driving direction of the plunger P changes depending on the direction of the current flowing through the solenoid S, so that the valve body V is moved toward and away from the valve seat 5a. . That is, the main solenoid valve 5 can open and close the valve seat 5a as the flow path of the main line 3 depending on the direction of the current flowing through the solenoid S. The inlet 5b of the main solenoid valve 5 is connected to the main adjuster 9 via a pipe, and the outlet 5c is connected to the second
Are connected to the side of the branch portion 3b.

The sub solenoid valve 6 has the same configuration as the main solenoid valve 5. However, as shown in FIG. 1, the sub solenoid valve 6 has its inlet 6b side connected to the sub regulator 10 and its outlet 6c side connected to the gas flow detecting means 11.

The main adjuster 9 and the sub adjuster 10 are integrally housed in a housing H1 provided in the first branch 3a, and the main solenoid valve 9 is connected to the first branch 3a. Located on the main line 3 via the sub-regulator 1
0 is located on the bypass line 4 via the first branch 3a.

As shown in FIG. 3, the main adjuster 9 has a valve body V which can be separated from and connected to the nozzle N, and moves the valve body V by means of a spring Sp, a diaphragm D and an arm. A controls it. The downstream side of the nozzle N is a decompression space C. When the pressure in the decompression space C increases, the diaphragm D rises, swinging the arm A, and pressing the valve body V against the nozzle N. become.

That is, the main regulator 9 further reduces the gas supplied from the automatic switching regulator 8 via the first branch 3a to a predetermined pressure (for example, 2 in this embodiment).
The pressure is reduced to 80 mmH ₂ O) and sent to the supply destination K via the main solenoid valve 5 and the second branch portion 3b.

The sub adjuster 10 has the same structure as the main adjuster 9. However, the sub regulator 10 reduces the pressure of the gas, which has been reduced to a pressure slightly higher than the main regulator (for example, 290 mmH ₂ O in this embodiment), by the throttle valve 1.
2. It is sent to the supply destination K via the sub solenoid valve 6, the gas flow detecting means 11, and the second branch 3b.

As shown in FIG. 2, the gas flow detecting means 11 has a flow measuring unit 11a, and is provided by a flow measuring gas flow detecting means (flow meter) for directly detecting the flow rate of the gas flowing in the bypass line 4. The gas inlet 11b is connected to the sub solenoid valve 6, and the outlet 11c is connected to the second branch 3b.

The cover 11d of the gas flow detecting means 11
Inside, a seismic sensor 7, a pressure sensor 13, a computer system (control unit) 14, a display unit 15, and a drive circuit 16 are provided.

The seismic sensor 7 is fixed to the gas flow detecting means 11 and is provided on the bypass line 4 side. As shown in FIG. 1, the side of the bypass line 4 is securely fixed via the clamp 4a to a structure such as a building or a frame installed on the ground. Then, the seismic device 7 comes to move together with the above structure. Further, an earthquake signal generated from the seismic device 7 is input to the computer system 14.

The pressure sensor 13 measures the pressure of the gas after the pressure is reduced by the sub regulator 10, and outputs a pressure signal to the computer system 14.

The computer system 14 converts, for example, a flow rate signal emitted from the flow rate measuring section 11a into a flow rate value of a predetermined unit and outputs the same to the display section 15 or the pressure sensor 1
The maximum value, the minimum value, and the like are selected from the pressure signal issued from the controller 3 and stored in a memory, and the pressure is output to the display unit 15.

The computer system 14 functions as a control unit for the main solenoid valve 5 and the sub solenoid valve 6, and receives, for example, an earthquake signal emitted from the seismic sensor 7 and receives the main solenoid valve 5 and the sub solenoid valve 6. Is output to the drive circuit 16.

The drive circuit 16 includes the computer system 1
A drive current for closing the main solenoid valve 5 and the sub solenoid valve 6 is output based on the closing signal from the main solenoid valve 4.

In the earthquake-supplying gas supply system configured as described above, when an earthquake of a predetermined seismic intensity or higher occurs,
A seismic signal is emitted from the seismic device 7, and the computer system 14 issues a signal for closing the main solenoid valve 5 and the sub solenoid valve 6 to the drive circuit 16 based on the seismic signal. Then, a current for closing these is output from the drive circuit 16 to the main solenoid valve 5 and the sub solenoid valve 6, and both the main solenoid valve 5 and the sub solenoid valve 6 are closed. Therefore, the main line 3 and the bypass line 4 are both closed, and the supply of gas from the common gas source 1 is completely stopped.

At the time of recovery after the earthquake, a small amount of gas is supplied from the bypass line 4 to the supply destination K by opening the sub solenoid valve 6, and the flow rate of the gas flowing at this time is detected by the gas flow detecting means 11. By measuring, a gas leak is detected. At this time, the flow rate of the supplied gas depends on the throttle valve 1.
2 keeps it small. If the flow rate of the gas does not become zero, it is determined that a gas leak has occurred in the pipe 2 or the like, the sub solenoid valve 6 is closed, and the location where the gas leak has occurred is found and repaired.

Therefore, gas leakage can be detected by supplying a small amount of gas, so that the location of gas leakage can be found and repaired safely and quickly.

Further, in a normal state, the gas is supplied to the supply destination K through both the main solenoid valve 5 and the sub solenoid valve 6. Therefore, the size of the main solenoid valve 5 can be reduced by the flow rate of the gas flowing through the sub solenoid valve 5. Therefore, when the main solenoid valve 5 is driven by the power supplied from the battery, there is an advantage that the life of the battery can be extended.

Further, since the gas flow detecting means 11 is constituted by a flow measuring gas flow detecting means, the flow rate of the gas flowing through the bypass line 4 can be directly and accurately measured. Therefore, the presence or absence of gas leakage can be immediately and accurately determined.

Further, a main regulator 9 is provided in the main line 3 and a sub regulator 10 is provided in the bypass line 4, and the pressure to be reduced by the sub regulator 10 is set higher than that of the main regulator 9. Even if both the main solenoid valve 5 and the sub solenoid valve 6 are open, if the gas leakage is less than the flow rate that can be supplied from the bypass line 4, the main regulator (9) remains closed. become.

For this reason, by detecting the flow rate of the gas flowing through the bypass line 4 for a long period of time (for example, 30 days) at intervals of one hour, for example, the flow rate of the gas becomes zero during each one-hour unit. If you have data,
There is a time period during which both the main regulator 9 and the sub regulator 10 are both closed, and therefore it can be determined that gas leakage has not occurred.

However, from any data during each one-hour unit, if the gas flow rate is always measured, it can be estimated that a gas leak has occurred somewhere.

Therefore, even if it is determined that there is no gas leak immediately after the earthquake and gas supply is started, the presence or absence of the subsequent gas leak can be continuously inspected by the gas flow detecting means 11. Therefore, for example, even in the case where the buried pipe which is about to be broken due to the earthquake may be broken due to the vibration of an automobile or the like, the break can be found while the break is very small, and measures such as repair can be taken.

Further, since the seismic sensor 7 is provided in the gas flow detecting means 11 and provided on the side of the bypass line 4 fixed to the structure, a predetermined seismic intensity determined to be dangerous by the seismic sensor 7 is provided. Can be accurately detected. Therefore,
Not only can the gas supply be stopped before danger arises due to the earthquake, but also the gas supply can be stopped during a non-dangerous earthquake.

Next, in the above-described embodiment, the process from the shutting down of the gas to the return of the gas is performed by the computer system 14.
With reference to FIG. 4, a description will be given of a logic configured to control automatically.

The computer system 14 executes the program by turning on or resetting the power. First, in step S1, it is determined whether or not an earthquake signal has been output from the seismic device 7, and if so, "YES" is determined. That is, it is determined that an earthquake having a predetermined seismic intensity has occurred, and the process proceeds to step S2 and step S2.
Proceed to 3. In step S2, a signal for closing the main solenoid valve 5 is output to the drive circuit 16, and in step S3, a signal for closing the sub solenoid valve 6 is output to the drive circuit 16.
As a result, a current is supplied from the drive circuit 16 to the main solenoid valve 5 and the sub solenoid valve 6 to close them,
The main solenoid valve 5 and the sub solenoid valve 6 are closed, and the common gas source 1
, The supply of gas is completely stopped.

Next, the process proceeds to step S4. In step S4, after closing the main solenoid valve 5 and the sub solenoid valve 6, a pressure signal from the pressure sensor 13 after a predetermined time has elapsed is input. This pressure signal is data obtained by measuring the pressure downstream of the main solenoid valve 5 and the sub solenoid valve 6.

Next, the process proceeds to step S5. In this step S5, the pressure measured by the pressure sensor 13 and
The pressure is compared with the reference pressure, and if the pressure of the pressure sensor 13 is higher than the reference pressure, “YES” is determined and step S6 is performed.
Then, the process proceeds to step S7. That is, after the main solenoid valve 5 and the sub solenoid valve 6 are closed, if the pressure on the downstream side of these solenoid valves 5, 6 is not reduced, it is determined that there is no gas leakage, and the process proceeds to steps S6 and S7. move on. In step S6, a signal for opening the main solenoid valve 5 is output to the drive circuit 16, and in step S7, the sub solenoid valve 6 is opened.
Is output to the drive circuit 16. Then, a current for opening the main solenoid valve 5 and the sub solenoid valve 6 is supplied from the drive circuit 16 to the main solenoid valve 5 and the sub solenoid valve 6, and the main solenoid valve 5 and the sub solenoid valve 6 are opened. As a result, the common gas is supplied from the common gas source 1 as usual.

After executing steps S6 and S7, the processing of the computer system 14 ends.

On the other hand, if the pressure measured by the pressure sensor 13 has become lower than the reference pressure in step S5, it is determined to be "NO". In this case, it is determined that there is a risk of gas leak, and the gas leak is inspected again by measuring the flow rate. Therefore, in step S5, "N
If it is determined to be "O", the process proceeds to step S8.

In step S8, a signal for opening the sub solenoid valve 6 is output to the drive circuit 16. Then,
A current for opening the sub solenoid valve 6 is supplied from the drive circuit 16 to the sub solenoid valve 6, and the sub solenoid valve 6 is opened. Therefore, the gas can flow to the supply destination K through the bypass line 4. However, the flow rate of the gas flowing through the bypass line 4 is limited to a minute flow rate by the throttle valve 12.

Then, the process proceeds to a step S9. Step S
In step 9, a flow signal output from the flow measuring unit 11a is input for a predetermined time. That is, the flow rate of the gas flowing through the bypass line 4 is measured. Next, the process proceeds to step S10, and in this step S10, it is determined whether or not the flow rate becomes zero after a lapse of a predetermined time.

In step S10, if the flow rate is zero, it is determined as "YES",
6 and step S7. That is, it is determined that no gas leakage has occurred, and Steps S6 and S7
Proceed to The main solenoid valve 5 and the sub solenoid valve 6 are opened. Since the sub solenoid valve 6 has already been opened, it may be sufficient to simply proceed to step S6.

In step S10, if the flow rate is not zero and the determination is "NO", the flow proceeds to step S11. In step S11, it is determined whether or not the flow rate is minute. And if it is minute, "YES"
The process proceeds to step S12 and further proceeds to step S12.
Proceed to 13. In step S12, a signal for closing the sub solenoid valve 6 is output to the drive circuit 16, and in step S13
Then, an alarm signal for a small gas leak is output to the display unit 15.
Then, after step S13, the process ends. That is, when it is confirmed that the gas is leaking minutely, the main solenoid valve 5 and the sub solenoid valve 6 are closed, an alarm signal indicating a small gas leak is displayed on the display unit 15,
The processing of the computer system 14 ends.

On the other hand, if the flow rate is large in step S11, "NO" is determined, and the process proceeds to step S14, and further proceeds to step S15. In step S14, a signal for closing the sub solenoid valve 6 is output to the drive circuit 16, and in step S15, an alarm signal for a large gas leak is output to the display unit 15. Then, after the step S15, the process ends. That is, when it is confirmed that the gas leakage is large, the main solenoid valve 5 and the sub solenoid valve 6 are closed, a warning signal of the large gas leak is displayed on the display unit 15, and the processing of the computer system 14 is performed. finish.

Then, step S13 or step S1
When the process is completed in step 5, a recovery work is performed to find a gas leak and a safety check is performed. Thereafter, by executing the program after step S8 in FIG. 4 again, it is possible to inspect whether or not restoration work has been performed at all the gas leak locations. Therefore, it is preferable that the logic of the computer system 14 be configured so that the program for detecting a gas leak after step S8 can be independently executed.

In FIG. 4, steps S1,
Steps S2 and S3 are programs for stopping gas supply when an earthquake occurs. Steps S4 and S5 are programs for detecting gas leakage by pressure. Steps S8, S9, S10, S11, S12, S13, S1
Steps S4 and S15 are programs for detecting gas leakage based on the flow rate, and steps S6 and S7 are programs for resuming gas supply when it is determined that there is no gas leakage.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. However, components common to those of the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be simplified. The difference between the second embodiment and the first embodiment is that the sub solenoid valve 6 is provided integrally in the gas flow detecting means 11.

That is, as shown in FIG. 5, the flow path 11 on the upstream side of the flow rate
e, a valve seat 6a of the sub solenoid valve 6 is formed, and a main body of the sub solenoid valve 6 is fixed to an upper portion of the flow path 11e. An inlet 6b of the sub solenoid valve 6 is formed on the upstream side of the valve seat 6a, and an outlet 6c is formed on the downstream side of the valve seat 6a.

In the earthquake-supplying gas supply system configured as described above, the sub solenoid valve 6 is connected to the gas flow detecting means 11.
Since it is integrally formed, there is an advantage that it is compact as a whole and takes up little space. Further, it is possible to save the trouble of attaching the sub solenoid valve 6 to the bypass line 4 as a single unit. Further, since the number of parts is reduced, the trouble of managing the parts can be omitted.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. However, components common to those of the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be simplified. This third embodiment is the first
The difference from the embodiment is that the main adjuster 9 is formed integrally with the main solenoid valve 5, and the sub adjuster 10 is formed integrally with the sub solenoid valve 6.

The main regulator 9, the main solenoid valve 5, the sub regulator 10, and the sub solenoid valve 6 are connected to the housing H2.
It is a structure that is housed integrally inside.

In the earthquake-supplying type gas supply system configured as described above, the main regulator 9 is formed integrally with the main solenoid valve 5, and the sub regulator 10 is formed integrally with the sub solenoid valve 6. Therefore, there is an advantage that it is compact as a whole and takes up little space. In addition, since the number of components is reduced, the labor for mounting individual components on the main line 3 and the labor for managing the components can be saved.

The main regulator 9, the main solenoid valve 5,
Since the sub adjuster 10 and the sub solenoid valve 6 are integrally housed in the housing H2, the size of the sub regulator 10 and the sub solenoid valve 6 can be further reduced, and the labor for mounting the components and the labor for managing the components can be further reduced.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. However, components common to those of the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be simplified. This fourth embodiment is the first
The difference from the embodiment is that the main adjuster 9 and the main electromagnetic valve 5 are constituted by a main adjusting electromagnetic valve (main adjusting valve) 17 having both of these functions, and the sub adjuster 10 and the sub electromagnetic valve 6 are formed by these. It is configured by a sub-adjustment solenoid valve (sub-adjustment valve) 18 having both functions.

That is, the main adjusting solenoid valve 17 has a structure in which the main solenoid valve 5 is attached to the main adjuster 9, and by projecting the plunger P of the main solenoid valve 5, one end of the arm A is connected to the diaphragm. D is pushed upward together with D to lock the valve body V in a state where the nozzle N is pressed. The sub-adjustment solenoid valve 18
The configuration is the same as that of the main adjustment solenoid valve 17.

The main adjustment solenoid valve 17 and the sub adjustment solenoid valve 18 are integrally formed in a housing H3.

In the earthquake-supplying gas supply system configured as described above, when a predetermined earthquake is detected by the seismic sensor 7, the main solenoid valve 5 and the sub solenoid valve are transmitted via the computer system 14 and the drive circuit 16. 6 is supplied with current, and the plunger P projects. Therefore, each nozzle N of the main adjustment solenoid valve 17 and the sub adjustment solenoid valve 18 is in a closed state. That is, the main adjustment solenoid valve 17 and the sub adjustment solenoid valve 18 have a function as a shutoff valve.

When each plunger P is separated from each arm A, the main adjustment solenoid valve 17 and the sub adjustment solenoid valve 18 have a function as a regulator for reducing the downstream pressure to a constant pressure. Has become.

Therefore, according to the above-mentioned earthquake-supply type gas supply equipment, the main regulator 9 and the main solenoid valve 5 are constituted by the main adjustment solenoid valve 17 having both of these functions. can do. Similarly, the sub-adjustment solenoid valve 18 can be made extremely compact. In addition, since the main adjustment solenoid valve 17 and the sub adjustment solenoid valve 18 are integrally housed in the housing H3, the whole can be made extremely compact. Other operations and effects similar to those of the third embodiment are provided.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. However, components common to those of the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be simplified. The fifth embodiment is different from the first embodiment in that the gas flow detecting means 11
Is constituted by a pressure-measuring gas flow detecting means for detecting a gas flow by a decrease in pressure.

That is, as shown in FIG. 9, the gas flow detecting means 11 has three branch pipes 111, 112, 113, and each branch pipe 111, 112, 113 has orifices 111a, 112a, 113a and a stop valve 114 are provided, respectively. Further, a pressure switch 115 for detecting the pressure of the gas on the downstream side is provided downstream of each of the branch pipes 111, 112, 113.

An upstream sub-regulator 116 is provided upstream of each of the branch pipes 111, 112 and 113, and a downstream sub-regulator 117 is provided between the pressure switch 115 and the sub solenoid valve 5. Is provided. The upstream sub-adjuster 116 and the downstream sub-adjuster 117 have the same structure as the sub-adjuster 6 and the main adjuster 9 described above.

However, the main adjuster 9 supplies, for example, gas
If that is configured to use the vacuum to 80mmH ₂ O, upstream sub regulator 116, for example 800MmH ₂
O, and the downstream sub-regulator 117
Is configured to reduce the pressure to, for example, 290 mmH ₂ O.

Therefore, for example, gas is no longer used at the supply destination K, and the pressure of the second branch 3b is 280 mmH ₂
When the pressure exceeds O, the main regulator 9 is closed, and gas is supplied only from the bypass line 4 via the downstream sub-regulator 117.

The upstream sub-adjuster 116 is located at the first branch 3a and is formed integrally with the main adjuster 9. That is, the upstream side sub adjuster 116 and the main adjuster 9 are integrally housed in the same housing H1.

Further, although not shown, the gas flow detecting means 11 is provided with the seismic sensor 7, the pressure sensor 13, the computer system 14, the display unit 15, and the drive circuit 16 shown in the first embodiment. The drive circuit 16 drives the main solenoid valve 5 and the sub solenoid valve 6.

In the anti-earthquake gas supply system configured as described above, the flow rate of the gas flowing through the bypass line 4 can be set depending on which stop valve 4 is opened. Here, the stop valve 114 of the orifice 111a having the smallest opening diameter is opened and the other is closed. It is also assumed that the sub solenoid valve 6 is open.

If the gas is not flowing in the bypass line 4, no pressure drop occurs at the orifice 111a. Therefore, the pressure at the position of the pressure switch 115 is reduced to 800 mmH ₂ by the upstream sub-regulator 116. O pressure. That is, FIG.
, The pressure at the position of the pressure switch 115 is
Gas flow rate was 800mmH ₂ O when the zero. Then, as the flow rate of the gas flowing through the bypass line 4 increases, the pressure decreases. Therefore, if the pressure is known, the flow rate flowing through the bypass line 4 can be obtained from the graph of FIG.

The pressure switch 115 is turned on when the pressure drops to a predetermined pressure, and
Is detected when a predetermined flow rate of gas flows. That is, the pressure sensor 115 determines the flow rate of the gas in step S9 in FIG.
4 has the same function as that of outputting it to C.4. Further, by providing a plurality of pressure switches 115 having different operating pressures, it is possible to provide the computer system 14 with data for determining the magnitude of the flow rate in steps S10 and S11.

Therefore, the pressure measuring type gas flow detecting means 1
1, the same effect as that of the first embodiment can be achieved. Moreover,
The portions for measuring the flow rate are the orifices 111a, 112a
113a, stop valve 114, pressure switch 115
Because it can be configured with a simple structure such as
Hard to break down and inexpensive.

In the above embodiment, the branch pipes 111, 112 and 113 are constituted by three pipes.
It may be constituted by one pipe or another plurality of branch pipes. However, in the case of a configuration with a plurality of branch pipes, different orifices having different opening diameters can be provided.
There is an advantage that the measurement range of the flow rate is widened.

Next, a sixth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. However, elements common to those of the fifth embodiment shown in FIG.
The description will be simplified. The difference between the sixth embodiment and the fifth embodiment is that the main regulator 9 and the main solenoid valve 5 are different.
And the downstream sub-regulator 117 and the sub solenoid valve 6 are integrally configured.

That is, the main adjuster 9, the main solenoid valve 5, and the upstream sub-adjuster 116 have a structure integrally housed in the housing H4.
17. The sub solenoid valve 6 has a structure integrally housed in the housing H5.

In the earthquake-supplying gas supply system configured as described above, the main regulator 9, the main solenoid valve 5,
Since the upstream sub-adjuster 116 is integrally formed, and the downstream sub-adjuster 117 and the sub solenoid valve 6 are integrally formed, there is an advantage that the whole becomes compact and takes up little space. is there. In addition, since the number of components is reduced, the labor for mounting individual components on the main line 3 and the labor for managing the components can be saved.

Next, a seventh embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. However, the first shown in FIGS.
The same reference numerals are given to the same components as those of the embodiment, and the description will be simplified. The seventh embodiment differs from the first embodiment in that the main adjuster 9 is constituted by a check valve and the sub adjuster 10 is removed.

That is, the main adjuster 9 is constituted by a check valve. The main adjuster 9 presses the spherical valve element 91 against the valve seat 93 with the spring 92 to move the main adjuster 9 from the second branch portion 3b to the first branch portion 3b. The backflow of the gas to the branch part 3a is prevented.

The flow of gas from the first branch 3a to the second branch 3b is subjected to resistance by the pressing force of the spring 92. Then, this resistance causes a minimum operating pressure to occur and the main regulator 9
Is reduced to a predetermined pressure. For example, the pressure of the first branch 3a is adjusted by the automatic switching regulator 8 to 200
mmH ₂ O, the second branch 3
As the pressure of a is 190mmH ₂ O, the strength of the spring 92 is set.

Accordingly, for example, the gas is not used at the supply destination K, and the pressure of the second branch 3b is 190 mmH ₂
When the pressure exceeds O, the main regulator 9 is closed, and gas is supplied only from the bypass line 4.

In the anti-earthquake gas supply system configured as described above, if a large amount of gas is consumed, the pressure on the downstream side of the main regulator 9 becomes low. The pressure difference between the downstream side and the downstream side becomes larger than the minimum operating pressure (10 mmH ₂ O in this embodiment), and the main regulator 9 is opened. In other words, the pressure on the downstream side of the main regulator 9 is 190 mmH _2.
Since it is lower than O, the main regulator 9 is opened, and the gas on the upstream side flows to the downstream side.

However, when the amount of gas used at the supply destination K decreases, the pressure downstream of the main regulator 9 becomes 190
mmH ₂ O or more, and the main regulator 9 is closed. Therefore, gas is supplied only through the bypass line 4.

Accordingly, the same effect as that of the first embodiment can be obtained in the anti-earthquake gas supply facility configured as described above. Moreover, the sub regulator 10 need not be provided on the bypass line 4 side, and the main regulator 9 can be configured with a simple structure using a check valve. is there.

Next, an eighth embodiment of the present invention will be described with reference to FIG.
3 will be described. However, elements common to those of the seventh embodiment shown in FIG. 12 are denoted by the same reference numerals, and description thereof will be simplified. The eighth embodiment is different from the seventh embodiment in that the main regulator 9 and the main solenoid valve 5 are integrally formed, and the sub solenoid valve 6 is connected to the gas flow detecting means 1.
1 is provided integrally.

In the earthquake-supplying gas supply system configured as described above, the main regulator 9 and the main solenoid valve 5
Are integrally formed and the sub solenoid valve 6 is integrally provided in the gas flow detecting means 11, so that there is an advantage that the whole device is compact and does not take up space. Also, since the number of parts is reduced, the main line 3
Also, the labor for mounting individual components on the bypass line 4 and the labor for managing the components can be saved.

Next, a ninth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. However, the same reference numerals are given to the same components as those of the seventh embodiment shown in FIG. 12, and the description will be simplified. This ninth embodiment is the seventh embodiment.
The difference from the embodiment is that the valve element 91 of the main adjuster 9 is constituted by a float.

That is, in the main regulator 9, the valve seat 93 is located below the valve body 91, and the minimum operating pressure is obtained by the weight of the valve body 91.

The same function and effect as those of the seventh embodiment can also be obtained in the gas supply equipment with anti-earthquake measures configured as described above. In addition, since the minimum operating pressure is obtained by the weight of the valve body 91, the spring 92 shown in the seventh embodiment is not required, and the cost can be reduced. Further, since there is no influence of variations of the springs 92 manufactured individually, the main regulator 9 having a constant minimum operating pressure can be obtained.

Next, a tenth embodiment of the present invention will be described with reference to FIG. However, the components common to the components of the ninth embodiment shown in FIG. 14 are denoted by the same reference numerals, and description thereof will be simplified. The tenth embodiment is different from the ninth embodiment in that the main regulator 9 and the main solenoid valve 5 are integrally formed, and the sub solenoid valve 6 is integrally provided in the gas flow detecting means 11. It is a point that is.

In the earthquake-supplying gas supply system configured as described above, the main regulator 9 and the main solenoid valve 5
Are integrally formed and the sub solenoid valve 6 is integrally provided in the gas flow detecting means 11, so that there is an advantage that the whole device is compact and does not take up space. Also, since the number of parts is reduced, the main line 3
Also, the labor for mounting individual components on the bypass line 4 and the labor for managing the components can be saved.

Next, an eleventh embodiment of the present invention will be described with reference to FIG. However, components common to those of the second embodiment shown in FIGS. 5 and 6 are denoted by the same reference numerals, and description thereof will be simplified. The eleventh embodiment is different from the second embodiment in that a pilot type main shutoff valve (main open / close valve) 5 is used instead of the main solenoid valve 5.

That is, the main shutoff valve 5 is configured so that the valve element 5e is pressed against the valve seat 5a by the diaphragm 5d. A space above the diaphragm 5d is a pilot chamber 5f, and a spring 5g for pressing the valve element 5e against the valve seat 5a is provided in the pilot chamber 5f. However, the spring 5g is
The valve is easily bent by the upstream pressure Pa of the valve seat 5a acting on the valve element 5d. That is, the spring 5f alone does not have enough force to keep the valve body 5d in contact with the valve seat 5a.

The pilot chamber 5f has a pilot pipe 51
Is connected to the pilot flow path 52 of the gas flow detecting means 11 via the. The pilot flow path 52 has one end connected to the inlet 6 b of the sub solenoid valve 6 and the other end connected to the pilot pipe 51. A driving solenoid valve (control valve) 50 for opening and closing the pilot flow path 52 is provided in the middle of the pilot flow path 52. The driving solenoid valve 50 is constituted by a two-way solenoid valve similar to the sub solenoid valve 6, and normally has a valve body V
Is pressed against the valve seat 50a to shut off the pilot flow path 52.

The pilot chamber 5f communicates with the outside air through a throttle valve (throttle) 5h. The throttle valve 5h is
The gas flowing into the pilot chamber 5f from the upstream side of the sub solenoid valve 6 through the pilot flow path 52 and the pilot pipe 51 does not cause a pressure loss while passing through these flow paths, and the gas leaks to the outside air. The diameter of the throttle is determined so that the flow rate is not dangerous. That is, the diameter of the throttle valve 5h is set such that a flow rate of 3 liter / hour flows out to the outside air when the upstream pressure Pb of the sub solenoid valve 6 acts on the pilot chamber 5f.

The upstream pressure Pa of the valve seat 5a is 280 mmH ₂ O by the main regulator 9, and the upstream pressure Pb of the sub solenoid valve 6 is 290 mmH ₂ O by the sub regulator 10. I have.

In the anti-earthquake type gas supply system configured as described above, the sub solenoid valve 6 is normally in a normal state.
Are in an open state, and the drive solenoid valve 50 is in a closed state. Therefore, the diaphragm 5d is pushed upward, and the valve element 5e is separated from the valve seat 5a. When the diaphragm 5d moves upward, the gas in the pilot chamber 5f flows out to the outside air through the throttle valve 5h.

When an earthquake having a predetermined seismic intensity is detected by the seismic sensor 7, a current is supplied from the drive circuit 16 to the sub solenoid valve 6 and the drive solenoid valve 50 via the computer system 14. Then, the sub solenoid valve 6 closes and the drive solenoid valve 50 opens. Therefore, the gas on the upstream side of the sub solenoid valve 6 flows into the pilot chamber 5f through the pilot flow path 52 and the pilot pipe 51, and further flows out of the throttle valve 5h to the outside air.

However, since the amount of gas flowing out of the throttle valve 5h is extremely small, the pressure in the pilot chamber 5f becomes the pressure Pb. For this reason, a pressure of 290 mmH ₂ O acts on the entire upper surface of the diaphragm 5d, and the valve element 5e is pressed against the valve seat 5a by the combined force of this pressure and the force of the spring 5g.

On the other hand, on the lower surface of the valve element 5e, 280 mmH
The pressure of ₂ O acts from the portion of the valve seat 5a, and the valve seat 5a is formed on the entire lower surface of the diaphragm 5d and around the lower surface of the valve element 5e.
Downstream pressure Pc acts. The downstream pressure Pc
Does not exceed 280 mmH ₂ O.

Therefore, the force for pushing the valve body 5e against the valve seat 5a is sufficiently larger than the force for pushing up the valve body 5e. Therefore, the valve seat 5a can be reliably closed by the valve element 5e.

Further, the driving solenoid valve 50 for shutting off the main shutoff valve 5 can be small. Therefore, the driving energy can be saved, and the life of the battery can be improved as long as the battery is used as a driving energy source. In addition, the driving solenoid valve 50
Can be made of an extremely inexpensive device because it is small.

Further, the main shut-off valve 5 has only a valve structure that only opens and closes, and no components such as solenoids are required. For this reason, even if the main shut-off valve 5 is constituted by a large one, it does not become expensive.

Therefore, the structure for stopping a large amount of gas in the common gas source 1 can be configured with low power consumption and low cost.

Further, there is an advantage that the main shutoff valve 5 can be opened with a simple structure using the throttle valve 5h.

In this embodiment, the computer system 14 can automatically perform the process from shutting down to returning. However, the main solenoid valve 5 shown in FIG.

Next, a twelfth embodiment of the present invention will be described with reference to FIG. However, components common to those of the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be simplified. The difference between the twelfth embodiment and the first embodiment is that the seismic sensor 7 is provided in the housing H1 on the main line 3 side, and the control means 70 for controlling the main solenoid valve 5 and the sub solenoid valve 6 is also a main means. This is a point provided in the housing H1 on the line 3 side.

That is, the main solenoid valve 5 is connected to the signal line 75
The sub solenoid valve 6 is connected to the control unit 70 via a signal line 76. The signal line 75 is wired from the main solenoid valve 5 to the control means 70 along the main line 3. The signal line 76 is wired from the sub solenoid valve 6 to the main line 3 along the bypass line 4, and further to the control means 70 along the main line 3. On the main line 3 side,
It is configured such that the structure is maintained by the rigidity of the piping.

In the earthquake-supplying gas supply equipment configured as described above, since the seismic sensor 7 is provided on the main line 3 side where the structure is maintained by the rigidity of the piping, the vibration caused by the earthquake is prevented by the piping. The amplified vibration is detected by the seismic sensor 7. Therefore, since the seismic sensor 7 operates in the same manner as the sensitive operation, the gas supply can be stopped on the safer side.

Moreover, since both the seismic sensor 7 and the main solenoid valve 5 are on the main line 3 side, even if the positions of the main line 3 and the bypass line 4 are relatively changed by the earthquake, the main line 3 side is kept. The signal line 76 from the only control means 70 to the main solenoid valve 5 does not break. Therefore, at least the supply of gas from the main line 3 can be stopped, so that a large amount of gas can be prevented from leaking.

Next, a thirteenth embodiment of the present invention will be described with reference to FIG. However, the components common to the components of the first embodiment shown in FIG. 17 are denoted by the same reference numerals, and description thereof will be simplified. The thirteenth embodiment differs from the twelfth embodiment in that the seismic device 7 is provided on the main line 3 side and also on the bypass line 4 side.

The signal line 75 is routed from the main solenoid valve 5 to the control means 70 along the main line 3. The signal line 76 extends from the sub solenoid valve 6 along the bypass line 4 to the drive circuit 1 in the gas flow detecting means 11.
6 (see FIG. 2).

In the anti-earthquake gas supply system configured as described above, the seismic devices 7 are provided on the main line 3 side and the bypass line 4 side, respectively. The signal line 75 and the signal line 76 do not break even if the line 4 side swings so as to be relatively displaced. Therefore, gas supply can be stopped in both the main line 3 and the bypass line 4.

The main solenoid valve 5 and the sub solenoid valve 6 may be closed when the signal lines 75 and 76 shown in FIGS. 1, 17 and 18 are cut off. A signal line from the seismic sensor 7 to the main solenoid valve 5 and the sub solenoid valve 6.
It is more preferable that the main solenoid valve 5 and the sub solenoid valve 6 are closed when the signal line is disconnected such that the control becomes impossible.

In the case of the above configuration,
Even if the signal line breaks due to the shaking of the earthquake, the gas supply can be reliably stopped. In addition, the main solenoid valve 5
Further, it is possible to prevent an accident that the sub solenoid valve 6 does not operate.

Further, a signal line extending from the seismic sensor 7 to the main solenoid valve 5 and the sub solenoid valve 6 such that the main solenoid valve 5 or the sub solenoid valve 6 cannot be controlled if the signal line is broken. May be configured to provide a disconnection detecting means for detecting the disconnection when is disconnected.

Then, in the case of the above configuration,
Since the disconnection detecting means can confirm whether the signal line is disconnected or not, the main solenoid valve 5 and the sub solenoid valve 6 do not operate during an earthquake, for example, because the signal line has already been disconnected. It is possible to prevent accidents such as accidents.

[0123]

According to the first aspect of the present invention, when an earthquake occurs, a predetermined pressure is applied from the control valve (50) to the main on-off valve (5) based on an earthquake signal emitted from the seismic sensor (7). Flows, the main on-off valve (5) is closed, and the main line (3) is closed. Therefore, the supply of gas stops at the common gas source (1). That is, the gas can be reliably stopped at the supply source.

Even if the control valve (50) is constituted by, for example, an electromagnetic valve, this electromagnetic valve only allows a small amount of gas of a predetermined pressure to flow through the control valve (50).
It can be configured with an extremely small capacity. For this reason, the control valve (50) can be configured with an extremely low power consumption and inexpensive valve.
In addition, since the power consumption of the control valve (50) is extremely small, the control valve (50) can be driven by a battery and the life of the battery can be prolonged.

Further, the main opening / closing valve (5) only needs to have a valve structure that performs only opening / closing, and no components such as solenoids are required. For this reason, even if the main on-off valve (5) is constituted by a large one, it does not become expensive.

Therefore, the structure for stopping a large amount of gas in the common gas source (1) can be configured with low power consumption and low cost.

In the invention according to claim 2, since the pilot chamber (5f) in the main on-off valve (5) is connected to the outside air through the throttle, the control valve (50)
Is supplied with a gas of a predetermined pressure, the pilot chamber (5f) is also filled with the gas of this pressure. However, when the supply of gas from the control valve (50) is stopped, the gas in the pilot chamber (5f) gradually flows out to the outside air via the throttle (5h). Therefore, the valve element (5e) is connected to the valve seat (5e).
It becomes possible to move away from a). That is, when the pressure from the valve seat (5a) acts, the valve element (5e) is immediately opened from the valve seat (5a).

Therefore, there is an advantage that the main on-off valve (5) can be opened with a simple structure using the throttle (5h).

In the invention according to claim 3, since the control valve (50) is constituted by a two-way solenoid valve, the main opening / closing valve (5) is opened by an electric signal at the time of recovery after an earthquake. It is very convenient. That is, operability can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an earthquake countermeasure type gas supply facility shown as a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a main part of the earthquake countermeasure type gas supply equipment.

FIG. 3 is an explanatory diagram showing a main line side and a bypass line side in the earthquake countermeasure type gas supply equipment.

FIG. 4 is a flowchart of the earthquake countermeasure type gas supply equipment.

FIG. 5 is an explanatory view of a main part of an earthquake countermeasure type gas supply facility shown as a second embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a main line side and a bypass line side in the earthquake countermeasure type gas supply equipment.

FIG. 7 is an explanatory diagram showing a main line side and a bypass line side of an earthquake-resistant gas supply facility shown as a third embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a main line side and a bypass line side of an earthquake countermeasure type gas supply facility shown as a fourth embodiment of the present invention.

FIG. 9 is an explanatory diagram showing a main line side and a bypass line side of an earthquake-resistant gas supply facility shown as a fifth embodiment of the present invention.

FIG. 10 is a diagram showing the relationship between the pressure and the flow rate of the gas flow detecting means in the earthquake countermeasure type gas supply equipment.

FIG. 11 is an explanatory diagram showing a main line side and a bypass line side of an earthquake countermeasure type gas supply facility shown as a sixth embodiment of the present invention.

FIG. 12 is an explanatory diagram showing a main line side and a bypass line side of an earthquake countermeasure type gas supply facility shown as a seventh embodiment of the present invention.

FIG. 13 is an explanatory diagram showing a main line side and a bypass line side of an earthquake-resistant gas supply facility shown as an eighth embodiment of the present invention.

FIG. 14 is an explanatory diagram showing a main line side and a bypass line side of an earthquake-resistant gas supply facility shown as a ninth embodiment of the present invention.

FIG. 15 is an explanatory diagram showing a main line side and a bypass line side of the earthquake-resistant gas supply equipment shown as the tenth embodiment of the present invention.

FIG. 16 is an explanatory view of a main part of an earthquake countermeasure type gas supply facility shown as an eleventh embodiment of the present invention.

FIG. 17 is an explanatory diagram showing a main line side and a bypass line side of an earthquake-resistant gas supply facility shown as a twelfth embodiment of the present invention.

FIG. 18 is an explanatory diagram showing a main line side and a bypass line side of an earthquake-resistant gas supply facility shown as a thirteenth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shared gas source 3 Main line 3a 1st branch part 3b 2nd branch part 4 Bypass line 5 Main opening / closing valve (main shutoff valve) 5a Valve seat 5e Valve body 5f Pilot chamber 5h Throttle (throttle valve) 6 Sub-valve ( 7 Sub-controller 11 Gas flow detecting means 17 Main control valve (Main control solenoid valve) 18 Sub-control valve (Sub-control solenoid valve) 50 Control valve (Drive solenoid valve) 116 Upstream side sub regulator 117 Downstream side sub regulator GB Gas cylinder K Supplier

[Procedure amendment]

[Submission date] July 5, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

The main adjuster 9 and the sub adjuster 10 are integrally housed in a housing H1 provided in the first branch 3a, and the main adjuster 9 is provided with the first branch 3a. Located on the main line 3 via the sub-regulator 1
0 is located on the bypass line 4 via the first branch 3a.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction contents]

At the time of recovery after the earthquake, a small amount of gas is supplied from the bypass line 4 to the supply destination K by opening the sub solenoid valve 6, and the flow rate of the gas flowing at this time is detected by the gas flow detecting means 11. By measuring, a gas leak is detected. At this time, the flow rate of the supplied gas depends on the throttle valve 1.
2 keeps it small. If the gas flow does not become zero, gas leakage occurs in the pipe 2 etc.
Then , the sub solenoid valve 6 is closed, and the location of the gas leak is found and repaired.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0070

[Correction method] Change

[Correction contents]

An upstream sub-regulator 116 is provided upstream of each of the branch pipes 111, 112 and 113, and a downstream sub-regulator 117 is provided between the pressure switch 115 and the sub solenoid valve 6. Is provided. The upstream sub-adjuster 116 and the downstream sub-adjuster 117 have the same structure as the sub-adjuster 10 and the main adjuster 9 described above.

[Procedure amendment 4]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 5

FIG. 10

FIG. 4

FIG. 6

FIG. 7

FIG. 8

FIG.

FIG. 9

FIG. 11

FIG. 13

FIG. 14

FIG.

FIG. 16

FIG.

FIG.

Claims (3)

[Claims] 1. A gas supply facility configured to supply gas from a common gas source (1) having a plurality of gas cylinders (GB) to a plurality of supply destinations (K) through pipes, wherein the common gas source (1) A main line (3) for supplying a large amount of gas to a supply destination (K), a main opening / closing valve (5) for directly opening and closing the main line (3), and opening / closing of the main opening / closing valve. Control valve (5
0) and a seismic sensor (7) that emits an earthquake signal by sensing an earthquake of a predetermined seismic intensity. The main on-off valve (5) is provided with a gas valve supplied from a control valve (50). The control valve (50) is configured to be closed by pressure, and based on the seismic signal,
An earthquake countermeasure type gas supply facility characterized in that a gas at a predetermined pressure is supplied to a main on-off valve (5). 2. The main on-off valve (5) guides the gas supplied from the control valve (50), moves the valve body (5e) toward the valve seat (5a), and moves the valve body (5a) toward the valve seat (5a). The pilot room (5f) for closing off the said, The said pilot room (5f) is connected to the outside air via the throttle (5h), The anti-earthquake type gas of Claim 1 characterized by the above-mentioned. Supply equipment. 3. The control valve (50) performs both an opening operation when supplying gas to the main on-off valve (5) and a closing operation when stopping gas supply to the main on-off valve (5). The earthquake-supply type gas supply equipment according to claim 1 or 2, wherein the gas supply equipment is configured by a two-way solenoid valve that performs electrical operation.