JP3469990B2 - Earthquake-resistant gas supply equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas supply facility configured to supply gas from a common gas source composed of a plurality of gas cylinders to a plurality of supply destinations through pipes. Earthquake countermeasure type gas supply equipment.

[0002]

2. Description of the Related Art In a gas supply facility of this type, it is important to immediately stop the supply of gas from a common gas source when an earthquake occurs to minimize damage from the earthquake. Therefore, it is necessary to block the main line of the common gas source at the same time as the earthquake occurs so that a large amount of gas does not flow to the supply destination.

In order to close the main line as described above, an electromagnetic shutoff valve that is electrically operated, for example, is provided in the main line, and when the earthquake is detected by the seismoscope, the electromagnetic shutoff is performed. The valve should close automatically.

[0004]

However, in order to close the main line through which a large amount of gas flows, it is necessary to construct the electromagnetic shutoff valve with a large size. That is, there is a problem that the electromagnetic shutoff valve consumes a large amount of power and becomes expensive.

The present invention has been made in view of the above problems, and an earthquake which can be constructed with a low power consumption and an inexpensive structure for stopping a large amount of gas in a common gas source The challenge is to provide a countermeasure gas supply facility.

[0006]

In order to solve the above problems, the invention according to claim 1 provides a plurality of gas cylinders (GB).
A gas supply facility configured to supply gas to a plurality of supply destinations (K) from a shared gas source (1) provided with a pipe, the common gas source (1) including the supply destinations (K). A main line (3) for supplying a large amount of gas to the main line, and a main opening / closing valve (5) for directly opening and closing the main line (3),
A gas flow detecting means 11 having a control valve (50) for controlling the opening and closing of the main on-off valve, and a seismoscope (7) for emitting an earthquake signal by detecting an earthquake of a predetermined seismic intensity are provided. Main open / close valve (5)
Is configured to close by the pressure of the gas supplied from the control valve (50), and the control valve (50) supplies the gas of a predetermined pressure to the main opening / closing valve (5) based on the seismic signal. Contact is configured to
The main on-off valve (5) is a control valve (5
0) guide the gas supplied from the valve body (5e) to the valve seat
The valve seat (5a) is closed by moving it toward (5a).
It has a pilot room (5f) for
The lot chamber (5f) is connected to the outside air via the diaphragm (5h).
It is characterized by being raised.

The invention according to claim 2 is the invention according to claim 1, wherein the control valve (50) is a main opening / closing valve.
Opening operation when supplying gas to (5) and main on-off valve
Both the closing operation when stopping the gas supply to (5)
It is characterized in that it is composed of a two-way solenoid valve that operates pneumatically .

[0008]

In the invention according to claim 1,
When an earthquake occurs, gas of a predetermined pressure flows from the control valve (50) to the main on-off valve (5) based on the earthquake signal emitted from the seismic sensor (7), and the main on-off valve (5) is closed. Then, the main line (3) is closed. Therefore, the gas supply is stopped 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, a solenoid valve, this solenoid 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 a low cost.
Moreover, 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 extended.

Further, the main on-off valve (5) has a valve structure that only opens and closes, and parts such as solenoids are unnecessary. Therefore, even if the main opening / closing valve (5) is large, it does not become expensive.

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

Further, in the invention according to claim 1 , since the pilot chamber (5f) in the main opening / closing valve (5) is connected to the outside air through the throttle, the gas of a predetermined pressure is supplied from the control valve (50). When supplied, the pilot chamber (5f) is filled with the gas having this pressure. However, if 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 body (5e)
Can be separated from the valve seat (5a). That is, when the pressure from the valve seat (5a) acts, the valve body (5e) is immediately opened from the valve seat (5a).

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

In the invention according to claim 2 , since the control valve (50) is constituted by a bidirectional electromagnetic valve, the main opening / closing valve (5) is opened by an electric signal even when the earthquake is restored. Can be very convenient. That is, operability can be improved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. 1 to 4 are the first embodiment, FIGS. 5 to 6 are the second embodiment, FIG. 7 is the third embodiment, FIG. 8 is the fourth embodiment, and FIGS. Fifth embodiment, 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 is a tenth embodiment, and FIG. 16 is a first embodiment.
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 earthquake countermeasure gas supply facility shown in the first embodiment supplies gas to a plurality of supply destinations K from a common gas source 1 provided with a plurality of gas cylinders GB through an embedded pipe 2. In the common gas source 1, the main line 3 connected to the pipe 2 to the supply destination K, and the first branch portion 3a and the second branch portion 3a with respect to the main line 3 are provided. Branch part 3b
A main solenoid valve (main valve that is provided between the bypass line 4 connected in parallel via the first line 3a and the second line 3b of the main line 3 and opens and closes 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 seismoscope 7 for detecting an earthquake of a predetermined seismic intensity and issuing an earthquake signal (see FIG. 2). And the main solenoid valve 5 and the sub solenoid valve 6 are closed based on the seismic signal.

As shown in FIG. 1, an automatic switching adjuster 8 is provided on the upstream side of the main line 3, and the gas cylinder GB is provided to the left and right of the automatic switching adjuster 8 via pipes 8a and 8b. Are connected multiple times. Automatic switching regulator 8
Is, for example, depressurizing the gas (for example, LP gas) supplied from the gas cylinder GB on the pipe 8a side to a predetermined pressure (for example, 0.3 to 0.8 Kg / c in this embodiment).
m ² ), and is supplied to the main line 3. Furthermore, when the gas on the pipe 8a side is exhausted, 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, and the valve body V is brought into contact with or separated 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 side of the main solenoid valve 5 is connected to the main regulator 9 via a pipe, and the outlet 5c side is the second
Is connected to the branching portion 3b side.

The sub solenoid valve 6 has the same structure 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 detection means 11.

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

As shown in FIG. 3, the main adjuster 9 has a valve body V which is constructed so as to be able to come into contact with and separate from the nozzle N. It is controlled by A. The pressure reduction space C is provided on the downstream side of the nozzle N. When the pressure in the pressure reduction space C increases, the diaphragm D rises, the arm A is swung, and the valve body V is pressed against the nozzle N. become.

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

The sub regulator 10 has the same structure as the main regulator 9. However, the sub-regulator 10 reduces the pressure of the gas that is slightly higher than that of the main regulator (for example, 290 mmH ₂ O in this embodiment) to the throttle valve 1.
2, the sub solenoid valve 6, the gas flow detection means 11, and the second branch portion 3b to send to the supply destination K.

As shown in FIG. 2, the gas flow detecting means 11 has a flow rate measuring section 11a and is a flow rate 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 side, and the outlet 11c is connected to the second branch portion 3b side.

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

The seismic sensor 7 is fixed to the gas flow detecting means 11 and is provided on the bypass line 4 side. Then, as shown in FIG. 1, the bypass line 4 side is securely fixed to a structure such as a building or a frame installed on the ground via a clamp 4a, so that an earthquake occurs. When this is done, the seismic sensor 7 will move together with the structure. The seismic signal emitted from the seismic sensor 7 is input to the computer system 14.

The pressure sensor 13 measures the pressure of the gas after decompression by the sub regulator 10 and outputs the 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 in a predetermined unit and outputs the flow rate value to the display section 15 or the pressure sensor 1.
The maximum value, the minimum value, etc. are selected from the pressure signal emitted from the unit 3 and stored in the memory, or the pressure is output to the display unit 15.

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

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

In the seismic countermeasure type gas supply facility constructed as described above, when an earthquake of a predetermined seismic intensity or more occurs,
An earthquake signal is issued from the seismoscope 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 earthquake signal. Then, the drive circuit 16 outputs a current for closing the main solenoid valve 5 and the sub solenoid valve 6, and the main solenoid valve 5 and the sub solenoid valve 6 are both 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.

Further, at the time of recovery after the earthquake, the sub solenoid valve 6 is opened to supply a minute flow rate of gas from the bypass line 4 to the supply destination K, and the flow rate of the gas flowing at this time is detected by the gas flow detecting means 11. Gas leaks are detected by measuring. The flow rate of the gas supplied at this time is the throttle valve 1
It is kept minute by 2. When the gas flow rate does not reach zero, gas leaks occur in the pipe 2 etc.
If so, the sub-solenoid valve 6 is closed, the location where the gas leak occurs is found and repaired.

Therefore, since a gas leak can be detected by supplying a small amount of gas, the location of the gas leak can be found and repaired safely and promptly.

Further, in a normal 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 main solenoid valve 5 can be downsized 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 the flow rate 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.

Furthermore, the main line 3 is provided with the main regulator 9, the bypass line 4 is provided with the sub-regulator 10, and the pressure 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 amount of gas leakage is less than the flow rate that can be supplied from the bypass line 4, the main regulator (9) remains closed. become.

Therefore, by detecting the flow rate of the gas flowing through the bypass line 4 for a long time (for example, 30 days) at intervals of, for example, one hour, the gas flow rate becomes zero during each hour unit. If you have data,
Since there is a time period in which both the main regulator 9 and the sub regulator 10 are closed, it can be determined that no gas leakage has occurred.

However, it can be estimated that the gas leakage is occurring somewhere if the flow rate of the gas is always measured regardless of any data for each hour unit.

Therefore, even if it is judged that there is no gas leakage immediately after the earthquake and the gas supply is started, the presence or absence of the gas leakage thereafter can be continuously inspected by the gas flow detection means 11. For this reason, for example, even if the buried pipe that is about to break due to an earthquake will break due to vibration of an automobile or the like, it is possible to find out the break even while it is minute and take measures such as repair.

Further, since the seismoscope 7 is provided inside the gas flow detection means 11 and is provided on the side of the bypass line 4 fixed to the structure, the seismic shock absorber 7 has a predetermined seismic intensity determined to be dangerous. Can be accurately detected. Therefore,
It is not only possible to stop the gas supply before the danger is caused by the earthquake, but it is also possible to prevent the gas supply from being stopped in the case of an earthquake that is not dangerous.

Next, in the above-described embodiment, the computer system 14 performs the process from the gas cutoff to the return.
The logic configured to be automatically controlled by will be described with reference to FIG.

The computer system 14 executes the program when the power is turned on or reset. First, in step S1, it is determined whether an earthquake signal is output from the seismoscope 7, and if it is output, it is determined as "YES". That is, it is determined that an earthquake with a predetermined seismic intensity has occurred, and step S2 and step S
Go 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 for closing the main solenoid valve 5 and the sub solenoid valve 6 from the drive circuit 16 is supplied,
The main solenoid valve 5 and the sub solenoid valve 6 are closed, and the common gas source 1
At, the gas supply is completely stopped.

Then, the process proceeds to step S4. In this step S4, after closing the main solenoid valve 5 and the sub solenoid valve 6, the 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 on the downstream side of the main solenoid valve 5 and the sub solenoid valve 6.

Then, the process proceeds to step S5. In this step S5, the pressure measured by the pressure sensor 13 and
If the pressure of the pressure sensor 13 is higher than the reference pressure, it is determined to be "YES", and step S6 is performed.
And it progresses to step S7. That is, after closing the main solenoid valve 5 and the sub solenoid valve 6, if the pressure on the downstream side of these solenoid valves 5 and 6 has not dropped, 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.
And outputs a signal for opening the drive circuit 16 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 open the main solenoid valve 5 and the sub solenoid valve 6. As a result, the normal gas is supplied from the common gas source 1.

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

On the other hand, in step S5, when the pressure measured by the pressure sensor 13 becomes lower than the reference pressure, it is determined to be "NO". In this case, it is judged that there is a risk of gas leakage, and the gas leakage is inspected again by measuring the flow rate. Therefore, in step S5, "N
When 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,
The drive circuit 16 supplies a current to the sub solenoid valve 6 to open it, and the sub solenoid valve 6 opens. 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 step S9. Step S
In 9, the flow rate signal output from the flow rate 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, in step S10, it is determined whether or not the flow rate is zero after a predetermined time has elapsed.

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

If the flow rate is not zero in step S10 and "NO" is determined, the process proceeds to step S11. In step S11, it is determined whether the flow rate is minute. And if it is minute, "YES"
Then, the process proceeds to step S12, and further step S
Proceed to 13. In step S12, a signal for closing the sub solenoid valve 6 is output to the drive circuit 16, and step S13
Then, an alarm signal of small gas leakage is output to the display unit 15.
Then, after the step S13, the processing is finished. That is, when it is confirmed that the gas leaks minutely, the main solenoid valve 5 and the sub solenoid valve 6 are closed, and an alarm signal of small gas leak is given to 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, it is determined to be "NO", 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 of large gas leak is output to the display unit 15. Then, after the step S15, the process is finished. That is, when it is confirmed that the gas leak is large, the main solenoid valve 5 and the sub solenoid valve 6 are closed, the warning signal of the 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 processing is completed in 5, the gas leak location is searched for, restoration work is performed, and safety confirmation is performed. After that, 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 points. Therefore, it is preferable that the logic of the computer system 14 is configured such that the program for detecting gas leakage after step S8 can be independently executed.

Further, in FIG. 4, step S1,
S2 and S3 are programs for stopping gas supply in the event of an earthquake, steps S4 and S5 are programs for detecting gas leakage by pressure, and steps S8, S9, S10, S11, S12, S13, S1
4 and S15 are programs for detecting gas leakage according to the flow rate, and steps S6 and S7 are programs for restarting gas supply when it is determined that there is no gas leakage.

Next, FIG. 5 shows a second embodiment of the present invention.
And FIG. 6 will be described. However, the elements common to the constituent elements of the first embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be simplified. The second embodiment differs from the first embodiment in that the sub electromagnetic valve 6 is integrally provided in the gas flow detection means 11.

That is, in the gas flow detecting means 11, as shown in FIG. 5, the flow path 11 on the upstream side of the flow rate measuring portion 11a is provided.
The valve seat 6a of the sub electromagnetic valve 6 is formed in e, and the main body of the sub electromagnetic valve 6 is fixed to the upper part of the flow path 11e. An inlet 6b of the sub electromagnetic 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-proof gas supply facility constructed as described above, the sub solenoid valve 6 is provided with the gas flow detection means 11
Since it is constructed integrally with the above, there is an advantage that it is compact as a whole and does not take up space. Further, it is possible to save the labor of attaching the sub solenoid valve 6 to the bypass line 4 as a single unit. Further, since the number of parts is reduced, it is possible to save the trouble of managing the parts.

Next, a third embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. However, the elements common to the constituent elements of the first embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be simplified. This third embodiment is the first
The difference from the embodiment is that the main regulator 9 is integrally configured with the main solenoid valve 5, and the sub regulator 10 is integrally configured 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 has a structure that is integrated inside.

In the earthquake-proof gas supply facility constructed as described above, the main regulator 9 is constructed integrally with the main solenoid valve 5, and the sub regulator 10 is constructed integrally with the sub solenoid valve 6. It has the advantages of compactness and space saving. Moreover, since the number of parts is reduced, it is possible to save the time and effort for mounting individual parts on the main line 3 and the time and effort for managing the parts.

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.
Will be described with reference to. However, the elements common to the constituent elements of the first embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be simplified. The fourth embodiment is the first
The difference from the embodiment is that the main regulator 9 and the main solenoid valve 5 are configured by a main regulator solenoid valve (main regulator valve) 17 having both functions, and the sub regulator 10 and the sub solenoid valve 6 are This is the point that it is configured by a sub-regulating solenoid valve (sub-regulating 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 diaphragmed. The valve body V is pushed upward together with D to lock the valve body V in a state in which the nozzle N is pressed. The sub-adjustment solenoid valve 18 also
It is configured similarly to the main adjusting solenoid valve 17.

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

In the seismic countermeasure type gas supply facility constructed as described above, when the seismoscope 7 senses a predetermined earthquake, the main solenoid valve 5 and the sub solenoid valve are passed through the computer system 14 and the drive circuit 16. Current is supplied to 6, and the plunger P projects. Therefore, the nozzles N in the main adjusting solenoid valve 17 and the sub adjusting solenoid valve 18 are closed. That is, the main adjusting solenoid valve 17 and the sub adjusting solenoid valve 18 have a function as a shutoff valve.

Further, when each plunger P is separated from each arm A, the main adjusting solenoid valve 17 and the sub adjusting solenoid valve 18 have a function as regulators for reducing the pressure on the downstream side to a constant pressure. Has become.

Therefore, according to the above-mentioned earthquake countermeasure type gas supply equipment, the main regulator 9 and the main solenoid valve 5 are constituted by the main regulation solenoid valve 17 having the functions of both of them, so that the whole is extremely compact. can do. Similarly, the sub adjusting solenoid valve 18 can be made extremely compact. Moreover, since the main adjusting solenoid valve 17 and the sub adjusting solenoid valve 18 are integrally housed in the housing H3, the overall size can be made extremely compact. Other effects similar to those of the third embodiment are achieved.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
~ It demonstrates with reference to FIG. However, the elements common to the constituent elements of the first embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be simplified. The fifth embodiment differs from the first embodiment in that the gas flow detection means 11
Is constituted by a pressure measurement type gas flow detection means for detecting the gas flow due to the decrease in pressure.

That is, the gas flow detecting means 11 is provided with three branch pipes 111, 112, 113 as shown in FIG. 9, and the branch pipes 111, 112, 113 have orifices 111a, 112a, 112a having different opening diameters, respectively. 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 on the downstream side of each of the branch pipes 111, 112 and 113.

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

However, the main regulator 9 supplies, for example, two gases.
If it is configured to reduce the pressure to 80 mmH ₂ O, the upstream sub-regulator 116 may be, for example, 800 mmH ₂
Downstream sub-regulator 117 configured to reduce the pressure to O
Is configured to reduce the pressure to, for example, 290 mmH ₂ O.

Therefore, for example, the gas is no longer used at the supply destination K, and the pressure at the second branch portion 3b is 280 mmH _2.
When it becomes O or more, the main regulator 9 is closed, and the gas is supplied only from the bypass line 4 via the downstream side sub regulator 117.

The upstream side sub-adjuster 116 is located at the first branch 3a and is constructed 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 seismoscope 7, the pressure sensor 13, the computer system 14, the display section 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 earthquake countermeasure gas supply facility constructed 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 others are closed. Further, the sub solenoid valve 6 is assumed to be open.

If no gas flows in the bypass line 4, no pressure drop occurs in the orifice 111a, so the pressure at the position of the pressure switch 115 is 800 mmH ₂ which is reduced by the upstream side sub-adjuster 116. It becomes O pressure. That is, FIG.
As shown in, the pressure at the position of the pressure switch 115 is
It becomes 800 mmH ₂ O when the gas flow rate is zero. Then, as the flow rate of the gas flowing through the bypass line 4 increases, the pressure drops. 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 the bypass line 4
It is designed to detect that a predetermined amount of gas is flowing. That is, the pressure sensor 115 determines the gas flow rate in step S9 in FIG.
It has the same function as that of outputting to No. 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
Even in the earthquake countermeasure type gas supply facility including No. 1, it is possible to obtain the same effects as those of the first embodiment. Moreover,
The portions for measuring the flow rate are the orifices 111a and 112a.
113a, stop valve 114, pressure switch 115
Since it can be configured with a simple structure such as
It is hard to break down and cheap.

In the above embodiment, the branch pipes 111, 112, 113 are composed of three pipes.
It may be composed of one pipe or a plurality of other branch pipes. However, in the case of configuring with a plurality of branch pipes, it is possible to provide the orifices with different opening diameters,
This has the advantage of widening the flow rate measurement range.

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 the constituent elements of the fifth embodiment shown in FIG.
The explanation will be simplified. The sixth embodiment is different from the fifth embodiment in that the main regulator 9 and the main solenoid valve 5 are different from each other.
Is integrally formed, and the downstream side sub-adjuster 117 and the sub electromagnetic valve 6 are integrally formed.

That is, the main regulator 9, the main solenoid valve 5, and the upstream side sub-adjuster 116 are integrally housed in the housing H4.
The sub solenoid valve 17 and the sub solenoid valve 6 are integrally housed in the housing H5.

In the earthquake countermeasure type gas supply equipment constructed as described above, the main regulator 9, the main solenoid valve 5,
Since the upstream side sub-regulator 116 is integrally configured, and the downstream side sub-regulator 117 and the sub solenoid valve 6 are integrally configured, there is an advantage that the whole is compact and does not occupy space. is there. Moreover, since the number of parts is reduced, it is possible to save the time and effort for mounting individual parts on the main line 3 and the time and effort for managing the parts.

Next, FIG. 1 shows a seventh embodiment of the present invention.
2 will be described. However, the first shown in FIGS.
The same reference numerals are given to the same elements as the constituent elements of the embodiment, and the description thereof will be simplified. The seventh embodiment is different from the first embodiment in that the main regulator 9 is composed of a check valve and the sub regulator 10 is removed.

That is, the main adjuster 9 is composed of a check valve, and the spherical valve element 91 is pressed against the valve seat 93 by the spring 92, so that the second branching portion 3b moves to the first branching portion 3b. The backflow of gas to the branch portion 3a is prevented.

The flow of gas from the first branch 3a to the second branch 3b is resisted by the pressing force of the spring 92. Then, this resistance causes the minimum working pressure, and the main regulator 9
The downstream side of is reduced to a predetermined pressure. For example, the pressure of the first branch portion 3a is set to 200 by the automatic switching regulator 8.
If it is set to mmH ₂ O, the second branch 3
The strength of the spring 92 is set so that the pressure a is 190 mmH ₂ O.

Therefore, for example, the gas is no longer used at the supply destination K, and the pressure in the second branch portion 3b is 190 mmH ₂
When it becomes O or more, the main regulator 9 is closed and gas is supplied only from the bypass line 4.

In the earthquake-proof gas supply facility constructed as described above, when a large amount of gas is consumed, the pressure on the downstream side of the main regulator 9 becomes low, so the upstream side of the main regulator 9 is reduced. And the pressure difference between 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 becomes lower than O, the main regulator 9 opens, 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 on the downstream side of the main regulator 9 becomes 190.
The pressure rises above mmH ₂ O and the main regulator 9 is closed. Therefore, the gas is supplied only through the bypass line 4.

Therefore, also in the earthquake countermeasure type gas supply facility configured as described above, the same operational effect as that of the first embodiment can be obtained. Moreover, the sub-adjuster 10 does not have to be provided on the bypass line 4 side, and the main adjustor 9 can be configured with a simple structure using a check valve, so that it is hard to break down and is inexpensive. is there.

Next, an eighth 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 seventh embodiment shown in FIG. 12 are designated by the same reference numerals to simplify the description. The difference between the eighth embodiment and the seventh embodiment is that the main regulator 9 and the main solenoid valve 5 are integrally formed, and the sub solenoid valve 6 is the gas flow detection means 1.
It is a point that is integrally provided in 1.

In the earthquake-proof gas supply facility constructed as described above, the main regulator 9 and the main solenoid valve 5 are installed.
Are integrally formed, and the sub electromagnetic valve 6 is integrally provided in the gas flow detecting means 11, so that there is an advantage that the whole is compact and does not occupy space. Also, since the number of parts is reduced, the main line 3
Therefore, it is possible to save the trouble of mounting individual parts on the bypass line 4 and the trouble of managing the parts.

Next, a ninth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. However, elements common to the constituent elements of the seventh embodiment shown in FIG. 12 will be assigned the same reference numerals and description thereof will be simplified. The ninth embodiment is the seventh
The difference from the embodiment is that the valve body 91 of the main adjuster 9 is composed of a float.

That is, in the main adjuster 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 seismic countermeasure type gas supply facility constructed as described above also exhibits the same effects as the seventh embodiment. Moreover, since the minimum operating pressure is obtained by the weight of the valve body 91, it is not necessary to provide the spring 92 shown in the seventh embodiment, and the cost can be reduced. Furthermore, since there is no influence of variations in the individually manufactured springs 92, it is possible to obtain the main regulator 9 having a constant minimum working pressure.

Next, a tenth embodiment of the present invention will be described with reference to FIG. However, elements common to the constituent elements of the ninth embodiment shown in FIG. 14 are designated by the same reference numerals, and the 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 configured, and the sub solenoid valve 6 is integrally provided in the gas flow detection means 11. That is the point.

In the earthquake-proof gas supply facility constructed as described above, the main regulator 9 and the main solenoid valve 5 are connected.
Are integrally formed, and the sub electromagnetic valve 6 is integrally provided in the gas flow detecting means 11, so that there is an advantage that the whole is compact and does not occupy space. Also, since the number of parts is reduced, the main line 3
Therefore, it is possible to save the trouble of mounting individual parts on the bypass line 4 and the trouble of managing the parts.

Next, an eleventh embodiment of the present invention will be described with reference to FIG. However, elements common to the constituent elements of the second embodiment shown in FIGS. 5 to 6 are given the same reference numerals to simplify the description. The eleventh embodiment differs from the second embodiment in that the main solenoid valve 5 is replaced by a pilot-type main shutoff valve (main on-off valve) 5.

That is, the main shutoff valve 5 is constructed so that the valve body 5e is pressed against the valve seat 5a by the diaphragm 5d. A space above the diaphragm 5d is a pilot chamber 5f, and this pilot chamber 5f is provided with a spring 5g for pressing the valve body 5e against the valve seat 5a. However, the spring 5g is
The upstream side pressure Pa of the valve seat 5a acting on the valve body 5d allows the valve body 5d to be easily bent. 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 detection means 11 via. One end of the pilot flow path 52 is connected to the inlet 6b of the sub solenoid valve 6, and the other end is connected to the pilot pipe 51. A solenoid valve (control valve) 50 for driving, which opens and closes the pilot channel 52, is provided in the middle of the pilot channel 52. The drive solenoid valve 50 is composed of 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 via a throttle valve (throttle) 5h. The throttle valve 5h
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 pressure loss while passing through these flow paths, and the gas leaks to the outside air. The throttle diameter is determined so that the flow rate is not dangerous. That is, the throttle valve 5h has its throttle diameter set so that a flow rate of 3 liters / hour flows to the outside air in a state where the upstream pressure Pb of the sub electromagnetic valve 6 acts on the pilot chamber 5f.

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

In the earthquake-proof gas supply facility constructed as described above, the sub-solenoid valve 6 is operated under normal normal conditions.
Is in the open state, and the driving solenoid valve 50 is in the closed state. Therefore, the diaphragm 5d is pushed upward, and the valve body 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.

Then, when an earthquake having a predetermined seismic intensity is detected by the seismograph 7, 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 is closed and the drive solenoid valve 50 is opened. Therefore, the gas on the upstream side of the sub electromagnetic valve 6 flows into the pilot chamber 5f through the pilot flow path 52 and the pilot pipe 51, and further flows out from the throttle valve 5h to the outside air.

However, since the amount of gas flowing out from the throttle valve 5h is extremely small, the pressure in the pilot chamber 5f becomes the pressure Pb. Therefore, a pressure of 290 mmH ₂ O acts on the entire upper surface of the diaphragm 5d, and the valve body 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, the lower surface of the valve body 5e is 280 mmH.
The pressure of ₂ O acts from the portion of the valve seat 5a, and the valve seat 5a is formed around the entire lower surface of the diaphragm 5d and the lower surface of the valve body 5e.
The downstream side pressure Pc of the above acts. The downstream pressure Pc
Does not exceed 280 mmH ₂ O.

Therefore, the force for pressing 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 body 5e can reliably close the valve seat 5a.

Moreover, the drive 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 if the battery is used as the driving energy source. Moreover, the driving solenoid valve 50
Can be composed of an extremely inexpensive one because it is small in size.

Furthermore, the main shut-off valve 5 has a valve structure that only opens and closes, and parts such as solenoids are unnecessary. Therefore, the main shutoff valve 5 does not become expensive even if it is configured with a large size.

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

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

Also in this embodiment, the computer system 14 can automatically perform from the interruption to the restoration. However, the main solenoid valve 5 shown in FIG. 4 becomes the main shutoff valve 5.

Next, a twelfth embodiment of the present invention will be described with reference to FIG. However, the elements common to the constituent elements of the first embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be simplified. This twelfth embodiment is different from the first embodiment in that the seismoscope 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 main This is the 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 means 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. Also, on the main line 3 side,
The structure is maintained by the rigidity of the piping.

In the earthquake-proof gas supply facility constructed as described above, the seismic shock absorber 7 is provided on the side of the main line 3 whose structure is maintained by the rigidity of the piping, so that the shaking caused by the earthquake can be caused by the piping. The vibration is amplified and the amplified vibration is detected by the vibration sensor 7. Therefore, since the seismoscope 7 operates in the same manner as the sensitive operation, the gas supply can be stopped on the safer side.

Moreover, since both the seismoscope 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 change relative to each other due to an earthquake, the main line 3 side The signal line 76 from the limited control means 70 to the main solenoid valve 5 is not broken. 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, elements common to the constituent elements of the first embodiment shown in FIG. 17 are designated by the same reference numerals, and the description thereof will be simplified. The thirteenth embodiment differs from the twelfth embodiment in that the seismoscope 7 is provided on both the main line 3 side and the bypass line 4 side.

The signal line 75 is wired from the main solenoid valve 5 along the main line 3 to the control means 70. 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 detection means 11.
6 (see FIG. 2).

In the seismic countermeasure type gas supply facility constructed as described above, since the seismic shock absorbers 7 are provided on the main line 3 side and the bypass line 4 side, respectively, the main line 3 side and the bypass line are bypassed by an earthquake. The signal line 75 and the signal line 76 are not broken even if the line 4 side sways so as to be relatively displaced. Therefore, the 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 broken. In addition, the signal line from the seismic sensor 7 to the main solenoid valve 5 and the sub solenoid valve 6, which is cut off, the main solenoid valve 5 or the sub solenoid valve 6
It is more preferable to close the main solenoid valve 5 and the sub solenoid valve 6 when the signal line that makes the above control impossible is disconnected.

Then, in the case of the above configuration,
Even if the signal line is broken due to the shaking of the earthquake, the gas supply can be reliably stopped. Also, because the signal line was already disconnected, the main solenoid valve 5
Also, it is possible to prevent an accident such as the sub solenoid valve 6 not operating.

Further, a signal line from the seismic sensor 7 to the main solenoid valve 5 and the sub solenoid valve 6, which is such that if the wire is disconnected, the main solenoid valve 5 or the sub solenoid valve 6 cannot be controlled. A disconnection detecting means may be provided to detect the disconnection when the disconnection is made.

Then, in the case of the above configuration,
Since it is possible to confirm whether or not the signal line is disconnected by the disconnection detection means, the main solenoid valve 5 and the sub solenoid valve 6 do not operate at the time of an earthquake because the signal line has already been disconnected, for example. It is possible to prevent such 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 opening / closing valve (5) based on the seismic signal emitted from the seismic sensor (7). Gas flows, the main on-off valve (5) is closed, and the main line (3) is closed. Therefore, the gas supply is stopped 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 composed of, for example, a solenoid valve, this solenoid 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 a low cost.
Moreover, 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 extended.

Furthermore, the main on-off valve (5) has a valve structure that only opens and closes, and no parts such as solenoids are required. Therefore, even if the main opening / closing valve (5) is large, it does not become expensive.

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

Further, in the invention according to claim 1 , since the pilot chamber (5f) in the main opening / closing valve (5) is connected to the outside air through the throttle, the gas of a predetermined pressure is supplied from the control valve (50). When supplied, the pilot chamber (5f) is filled with the gas having this pressure. However, if 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 body (5e)
Can be separated from the valve seat (5a). That is, when the pressure from the valve seat (5a) acts, the valve body (5e) is immediately opened from the valve seat (5a).

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

In the invention according to claim 2 , since the control valve (50) is constituted by a bidirectional electromagnetic valve, the main on-off valve (5) is opened by an electric signal even when the earthquake is restored. Can be very convenient. That is, operability can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram 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 gas supply facility.

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

FIG. 4 is a flow chart of the earthquake countermeasure gas supply facility.

FIG. 5 is an explanatory view of the essential parts of the earthquake countermeasure gas supply facility shown as the second embodiment of the present invention.

FIG. 6 is an explanatory view showing a main line side and a bypass line side in the earthquake countermeasure gas supply facility.

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

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

FIG. 9 is an explanatory view showing a main line side and a bypass line side of the earthquake countermeasure gas supply facility shown as the 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 detection means in the earthquake countermeasure gas supply facility.

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

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

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

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

FIG. 15 is an explanatory view showing a main line side and a bypass line side of the earthquake countermeasure gas supply facility shown as the tenth embodiment of the present invention.

FIG. 16 is an explanatory view of the essential parts of the earthquake countermeasure gas supply facility shown as the eleventh embodiment of the present invention.

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

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

[Explanation of symbols]

1 common gas source 3 main lines 3a First branch part 3b Second branch part 4 Bypass line 5 Main open / close valve (main shutoff valve) 5a valve seat 5e valve body 5f pilot room 5h throttle (throttle valve) 6 Sub valve (sub solenoid valve) 7 seismic devices 9 Main adjuster 10 sub regulator 11 Gas flow detection means 17 Main adjustment valve (Main adjustment solenoid valve) 18 Sub adjusting valve (Sub adjusting solenoid valve) 50 control valve (drive solenoid valve) 116 Upstream side sub regulator 117 Downstream sub regulator GB gas cylinder K supplier

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F17D 1/00-5/08 F16K 17/18-17/34 F16K 31/34 G01M 3/00-3 / 40 G01F 1/00-1/54 G01F 3/00-9/02 F23N 1/00

Claims (2)

(57) [Claims] 1. A gas supply facility configured to supply gas from a shared gas source (1) having a plurality of gas cylinders (GB) to a plurality of supply destinations (K) through a pipe, the shared gas source In (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 / closing this main line (3), and opening / closing of this main opening / closing valve are shown. Control valve to control (5
0) provided with a gas flow detection means 11 and a seismoscope (7) that emits an earthquake signal by detecting an earthquake of a predetermined seismic intensity, and the main opening / closing valve (5) includes a control valve ( 50) is configured to be closed by the pressure of gas supplied from the control valve (50),
It is configured to supply a gas having a predetermined pressure to the main opening / closing valve (5), and the main opening / closing valve (5) is a control valve (50).
Guide the gas supplied from the valve body (5e) to the valve seat (5a)
For closing the valve seat (5a) by moving it toward
It has a pilot chamber (5f), and the pilot chamber (5f) is connected to the outside via a diaphragm (5h).
Earthquake-proof gas supply facility characterized by being connected . 2. A control valve (50) for opening and closing the main
Opening operation when supplying gas to the valve (5) and main opening / closing valve
Both the closing operation when stopping the gas supply to (5)
The anti-earthquake type gas supply facility according to claim 1, characterized in that the gas supply facility is constituted by a two-way electromagnetic valve that performs gas.