JP3469989B2 - 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 this type of gas supply equipment, it is important to minimize damage caused by an earthquake and to promptly restore after the earthquake.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an earthquake countermeasure type gas supply facility which enables quick recovery especially after an earthquake.

[0004]

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) connected to the main line (3) and a bypass line (4) connected in parallel to the main line (3) via a first branch part (3a) and a second branch part (3b). And between the first branch portion (3a) and the second branch portion (3b) of the main line (3),
A main valve (5) that opens and closes the main line (3), a sub-valve (6) that is installed in the bypass line (4) and that opens and closes the bypass line (4), and senses an earthquake with a predetermined seismic intensity. and a seismoscope (7) for emitting seismic signals becomes, the main valve (5) and configured to close the sub valve (6) based on the seismic signals by said Baipasura
The gas flow in the bypass line (4) is supplied to the in (4).
Gas flow detection means (11) for detecting this is provided,
The main valve (5) and sub valve (6) closed when the earthquake occurred
Then, open only the sub valve (6) to prevent gas leakage during restoration.
It is characterized in that it is configured so as to be confirmed by the flow detector (11) .

The invention according to claim 2 is the same as the invention according to claim 1, wherein the sub-valve (6) is provided with a gas flow detecting means (11).
It is characterized by being configured integrally with .

The invention according to claim 3 is claim 1 or claim
In the invention of claim 2 , the gas flow detection means (11) is
Flow rate measuring gas flow detection means to detect the flow rate of gas
It is characterized by being composed Te.

The invention according to claim 4 is claim 1 or claim
In the invention of claim 2 , the gas flow detection means (11) is
A pressure measurement type gas sensor that detects gas flow by pressure drop.
It is characterized in that it is constituted by a flow detector .

The invention according to claim 5 is claim 1, claim 1.
2, in the invention according to claim 3 or claim 4, the main
In the line (3), the gas pressure to the supply destination (K) is set to a predetermined value.
Install the main regulator (9) to reduce the pressure to
In the line (4), the gas pressure to the supply destination (K) is
The pressure is reduced to a pressure slightly higher than that of the main regulator (9).
It is characterized in that a regulator (10) is provided .

The invention according to claim 6 is the invention according to claim 4 , wherein the main line (3) is connected to the supply destination (K).
Main regulator that reduces the pressure of the gas in the specified pressure
(9) is provided, and the bypass line (4) has a pressure measurement type
A downstream side sub-adjuster (10) is provided on the downstream side of the gas flow detection means.
The downstream side sub-regulator (10) is provided at the destination
Adjust the gas pressure to (K) from the main regulator (9).
It is characterized in that the pressure is reduced to a slightly high pressure .

The invention according to claim 7 is claim 1, claim 1.
In the invention according to claim 2, claim 3 or claim 4 , the main line (3) includes a check valve.
The minimum operating pressure of the check valve
Main to reduce the pressure of the gas to the tip (K) to a predetermined pressure
It is characterized in that a regulator (9) is provided .

The invention according to claim 8 is claim 5,
In the invention according to claim 6 or claim 7 , the main regulator
(9) is characterized by being configured integrally with the main valve (5) .

The invention according to claim 9 is claim 5 or claim
In the invention of claim 6 , the sub-adjuster (10) is a sub-adjuster.
It is characterized in that it is constructed integrally with the valve (6) .

The invention according to claim 10 includes claims 5 and 5.
In the invention according to claim 6 or claim 7 , the main regulator
(9) and the main valve (5) have both functions.
It is characterized in that it is constituted by a main regulating valve (17) provided .

The invention according to claim 11 is the invention according to claim 5 or the contract.
In the invention according to claim 6 , the sub-adjuster (10) and the support
The valve (6) is a sub-adjustment that has both functions.
It is characterized by being constituted by a valve (18) .

The invention according to claim 12 is the invention according to claim 1.
In the invention according to any one of claims 11 to 14,
Inn (4) side is the structure such as buildings and frameworks installed on the ground.
It is fixed to the structure and the seismic sensor (7) is
It is characterized in that it is provided on the side (4) .

[0016] The invention according to claim 13 is the invention according to any one of claims 1 to 12, mainline
The structure on the side (3) is maintained by the rigidity of the piping.
The seismic sensor (7) is provided on the main line (3) side .

The invention according to claim 14 relates to claims 1 to
The invention according to any one of claims 11 to 13,
(7) is the main line (3) side and bypass line
It is characterized in that it is provided on each of the (4) side .

The invention according to claim 15 is from claim 1 to
In the invention according to claim 14, Earthquake Detector
From (7) to main valve (5) and sub valve (6)
When the signal line installed between the
It is characterized in that (5) and the sub-valve (6) are closed .

According to a sixteenth aspect of the present invention, in the invention according to any one of the first to fifteenth aspects, between the seismoscope (7) and the main valve (5) and the sub valve (6). Disconnection detecting means for detecting disconnection of the provided signal line
It is characterized in that it comprises a.

The invention according to claim 17 is the invention according to any one of claims 1 to 16, wherein the main valve
(5) and the sub valve (6) electrically open and close the flow path.
It is characterized by being configured by a bidirectional solenoid valve .

[0021]

In the invention according to claim 1,
When an earthquake occurs, the main valve (5) and the sub valve (6) are closed based on the earthquake signal emitted from the seismic sensor (7). Therefore, both the main line (3) and the bypass line (4) are closed, and the gas supply is stopped at the common gas source (1). That is, the supply of gas can be stopped at the supply source.

In the recovery after the earthquake, the sub-valve (6) is opened to supply a small amount of gas to the supply destination (K), whereby the common gas source (1) is supplied to the supply destination (K). It is possible to confirm gas leaks leading up to. That is, since the gas leakage can be confirmed without supplying a large amount of gas by opening the main valve (5), the gas leakage can be confirmed safely and promptly.

Further, in a normal gas supply state, gas flows in both the main valve (5) and the sub valve (6). Therefore, the main valve (5) can be downsized by the flow rate of the gas flowing through the sub valve (6). Therefore, when the main valve (5) is driven by a battery, there is an advantage that the life of the battery can be extended.

In the invention according to claim 1 , since the gas flow detection means (11) is provided in the bypass line (4), the gas flow detection means (11)
You can easily check for gas leaks.

In the invention according to claim 2 , since the sub-valve (6) is integrally formed with the gas flow detecting means (11), 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 valve (6) to the bypass line (4) as a single unit. Further, since the number of parts is reduced, there is an advantage that the labor for managing the parts can be omitted.

In the invention according to claim 3 , 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 determined. Can be measured. Therefore, the presence / absence of gas leakage can be accurately and immediately determined.

In the invention according to claim 4 , since the gas flow detection means (11) is constituted by the pressure measurement type gas flow detection means, the gas indirectly flowing through the bypass line (4) depending on the degree of decrease in pressure. The flow rate of the gas can be measured, which allows confirmation of gas leakage. Further, since the gas flow detection means (11) can be constructed with a simple structure for simply measuring the pressure, it is hard to break down and is inexpensive.

In the invention according to claim 5 , the main regulator (9) is provided in the main line (3), the sub regulator (10) is provided in the bypass line (4), and the sub regulator (10). Since the pressure for decompressing is set higher than that of the main regulator (9), if the leak amount of gas is small and this leak amount can be compensated by the flow rate of gas supplied from the bypass line (4). , Sub solenoid valve (10)
Open, but the main regulator (9) remains closed.

Therefore, for example, when the flow rate of the gas flowing through the bypass line (4) or the presence or absence of the gas flow is detected at intervals of 1 hour for a long period (for example, 30 days), the gas is discharged during each 1 hour unit. If there is data with zero flow, the main line (3) and bypass line (4)
Since there is a time period during which no gas is flowing, it can be determined that no gas leakage has occurred.

However, if there is no data indicating that the gas flow is zero at any one-hour interval, it can be estimated that a gas leak has occurred.

Therefore, even if it is judged that there is no gas leakage immediately after the earthquake and the supply of gas 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 buried pipes that were about to break due to an earthquake were to be broken due to vibration of an automobile or the like and gas leaks occurred, the gas leaks should be discovered and repaired while the gas leaks are small. Can take measures.

Also in the invention according to claim 6 , claim 5
The same action and effect are obtained.

In the seventh aspect of the invention, usually, when a large amount of gas is consumed, the pressure on the downstream side of the main regulator (9) becomes low. Therefore, the differential pressure between the upstream side and the downstream side in the main regulator (9) becomes larger than the minimum operating pressure of the main regulator (9), and the main regulator (9) is opened. However, when the amount of gas used in the supply destination (K) decreases, the pressure on the downstream side of the main regulator (9) increases, and the differential pressure between the upstream side and the downstream side of the main regulator (9) becomes the main adjustment. Below the minimum operating pressure of the device (9), the main regulator (9) is closed.

Therefore, when the gas flow rate is low,
The gas will be supplied to the supply destination (K) through only the bypass line (4). Therefore, claim 6
Similarly to the invention according to the above, by detecting the flow rate of the gas flowing through the bypass line (4) or the presence or absence of the gas flow for a long period at intervals of, for example, 1 hour, the presence or absence of gas leakage is continuously inspected even after the restoration. be able to.

In the invention according to claim 8 , since the main regulator (9) is constructed integrally with the main valve (5), there is an advantage that it is compact as a whole and does not take up space. In addition, since the number of parts is reduced, it is possible to save the trouble of attaching to the main line (3) and the trouble of managing the parts.

In the invention according to claim 9 , since the sub-regulator (10) is constructed integrally with the sub-valve (6), there is an advantage that it is compact as a whole and does not take up space. In addition, since the number of parts is reduced, it is possible to save the labor for attaching to the sub line (4) and the labor for managing the components.

In the invention according to claim 10 , since the main regulator (9) and the main valve (5) are constituted by the main regulator valve (17) having both functions, the whole is extremely compact. Become. In addition, the same effect as the invention according to claim 8 is obtained.

In the invention according to claim 11 , since the sub-regulator (10) and the sub-valve (6) are constituted by the sub-regulation valve (18) having both functions, the whole is extremely compact. Become. Others, claim 9
The same effects as those of the invention according to are obtained.

According to the twelfth aspect of the invention, the seismoscope (7) is provided on the side of the bypass line (4) fixed to the structure.
Since it is provided, it is possible to accurately detect a predetermined seismic intensity that is dangerous. Therefore, it is possible to stop the gas supply before the danger is caused by the earthquake, and it is possible to prevent the trouble that the gas supply is stopped even though it is not dangerous.

According to the thirteenth aspect of the invention, since the seismic sensor (7) is provided on the main line (3) side where the rigidity is maintained by the pipe, the vibration due to the earthquake is amplified by the pipe, and this amplification The swaying motion will be detected by the seismic sensor (7). Therefore, since the seismoscope (7) operates sensitively, the gas supply can be stopped on the safer side.

Moreover, the vibration sensor (7) and the main valve (5)
Are both on the main line (3) side, even if the positions of the main line (3) and the bypass line (4) are relatively displaced due to an earthquake, the main valve (5) The signal line routed to () does not break. Therefore, there is an advantage that the main line (3) for supplying a large amount of gas can be stopped without fail.

In the fourteenth aspect of the present invention, the seismoscope (7) is provided on each of the main line (3) side and the bypass line (4) side. Even if the position with respect to the bypass line (4) is relatively deviated, the signal line wired from the seismograph (7) side to the main valve (5) in the main line (3) and the bypass line (4) Sensitive device (7)
The signal line wired from the side to the sub-valve (6) is not broken. Therefore, the supply of gas can be stopped without fail from the main line (3) and the bypass line (4).

According to the fifteenth aspect of the present invention, even if any signal line from the seismograph (7) to the main valve (5) and the sub valve (6) is disconnected, the main valve (5) and the sub valve (6) can be closed. Therefore,
Even if the signal line is broken by the earthquake, the gas supply can be reliably stopped. Also, since gas is not supplied when the signal line is disconnected, the main valve (5) and sub-valve (6) do not operate during an earthquake, for example, because the signal line has already been disconnected. It is possible to prevent such accidents.

As the signal line, if there is a control unit, for example, between the seismoscope (7) and the control unit, and between the control unit and the main valve (5) or the sub valve (6). , The signal lines provided between the main valve (5) and the sub-valve (6), which are all signal lines that will not operate the main valve (5) or the sub-valve (6) if cut off become. The signal line between the main valve (5) and the sub valve (6) may be provided, for example, when a signal is sent from the control unit to the sub valve (6) via the main valve (5).

In the sixteenth aspect of the present invention, since it is possible to confirm whether or not the signal line is disconnected by the disconnection detection means, for example, the signal line has already been disconnected. Valve (5) and sub-valve (6)
It is possible to prevent accidents such as that the Further, as the signal lines, as described above, all the signal lines that will not operate the main valve (5) or the sub-valve (6) will be the target.

In the seventeenth aspect of the invention, since the main valve (5) and the sub-valve (6) are constituted by the bidirectional solenoid valve, these main valves (5 ) And the sub valve (6) can be opened, which is extremely convenient. That is, operability can be improved.

[0048]

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, the 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 regulator 8 is provided on the upstream side of the main line 3, and the gas cylinder GB is provided on the left and right of the automatic switching regulator 8 via pipes 8a and 8b. Are connected multiple times. Automatic switching regulator 8
Is depressurized (for example, 0.3 to 0.8 Kg / cm ² in this embodiment) to a predetermined pressure for the gas (for example, LP gas) supplied from the gas cylinder GB on the pipe 8a side, and the main line 3 It is designed to be supplied to. 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 the 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 can be brought into and out of contact with the nozzle N, and the movement of the valve body V is controlled by the spring Sp, the diaphragm D and the arm. 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 earthquake-proof gas supply facility configured as described above, when an earthquake with 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 electromagnetic 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, by supplying a small amount of gas, the gas leak can be detected, and therefore 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 detection means 11 is constituted by the flow rate measurement type gas flow detection 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, since the main regulator 9 is provided in the main line 3 and the sub regulator 10 is provided in the bypass line 4, the pressure reduced by the sub regulator 10 is set higher than that in 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.

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 1 hour, the flow rate of the gas 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 is possible to estimate 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 supply of gas is started, the presence or absence of the subsequent gas leakage 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 gas cutoff to recovery.
The logic configured to be automatically controlled by will be described with reference to FIG.

The computer system 14 executes the program by turning on the power or resetting. 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 is completed.

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.

In step S10, if the flow rate is not zero 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 described above, 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, a second embodiment of the present invention will be described with reference to FIG.
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 section 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 countermeasure type gas supply facility constructed as described above, the sub solenoid valve 6 is provided with the gas flow detecting 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, FIG. 8 shows a fourth embodiment of the present invention.
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 portion 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 earthquake-proof gas supply facility constructed as described above, when the seismoscope 7 detects a predetermined earthquake, the main solenoid valve 5 and the sub-solenoid valve are transmitted 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.

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-prevention 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, 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 sub-adjuster 116 is provided upstream of each branch pipe 111, 112, 113, and a downstream sub-adjuster 117 is provided between the pressure switch 115 and the sub solenoid 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, 2 gas.
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, no gas is 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 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 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.

[0107] Then, when the bypass line 4 that no gas flows, 800MmH there is no necessity to create a pressure drop at the orifice 111a, the pressure at the location of the pressure switch 115 is depressurized by the upstream sub regulator 116 ₂ 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 measurement type gas flow detection means 1
Even earthquakes Gas supply equipment having a 1, it is possible to obtain the same effects as the first embodiment. Moreover, the portions for measuring the flow rate are the orifices 111a, 11a.
2a113a, stop valve 114, pressure switch 1
Since it can be configured with a simple structure such as 15, it is less likely to fail and is inexpensive.

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-regulator 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-proof gas supply facility 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, a seventh embodiment of the present invention will be described with reference to FIG.
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 branch portion 3b moves to the first branch. 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 becomes small, 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-resistant 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.

The eleventh embodiment of the present invention will be described next 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 5.

That is, the main shutoff valve 5 is constructed so that the diaphragm 5d presses the valve body 5e against the valve seat 5a. 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. Further, a solenoid 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 bi-directional solenoid valve similar to the sub solenoid valve 6, and normally presses the valve body V against the valve seat 50a to shut off the pilot flow passage 52. Has become.

The pilot chamber 5f communicates with the outside air via the throttle valve 5h. The throttle valve 5h is configured so that the gas flowing from the upstream side of the sub electromagnetic valve 6 into the pilot chamber 5f through the pilot passage 52 and the pilot pipe 51 does not cause pressure loss while passing through these passages, and So that the flow rate is not dangerous even if it leaks to the outside air,
The aperture diameter is determined. That is, the throttle valve 5h
Indicates that the upstream pressure Pb of the sub solenoid valve 6 is 5 f in the pilot chamber.
The throttle diameter is set so that a flow rate of 3 liters / hour flows to the outside air in the state of acting on.

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.

When the seismograph 7 detects an earthquake having a predetermined seismic intensity, 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 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 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. Also, in this embodiment as well, the computer system 14 performs the operations from shutoff to restoration.
Can be done automatically by. 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 where the structure is maintained by the rigidity of the pipes, so that shaking caused by an earthquake can occur in the pipes. 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, the 12th shown in FIG.
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 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 seismographs 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.

Furthermore, 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.

[0150]

According to the first aspect of the invention, when an earthquake occurs, the main valve (5) and the sub valve (6) are closed based on the seismic signal emitted from the seismic sensor (7). . Therefore, both the main line (3) and the bypass line (4) are closed, and the gas supply is stopped at the common gas source (1). That is, the supply of gas can be stopped at the supply source.

In the recovery after the earthquake, the sub-valve (6) is opened to supply a small flow rate of gas to the supply destination (K), whereby the common gas source (1) is supplied to the supply destination (K). It is possible to confirm gas leaks leading up to. That is, since the gas leakage can be confirmed without supplying a large amount of gas by opening the main valve (5), the gas leakage can be confirmed safely and promptly.

Further, in the normal gas supply state, the gas flows through both the main valve (5) and the sub valve (6). Therefore, the main valve (5) can be downsized by the flow rate of the gas flowing through the sub valve (6). Therefore, when the main valve (5) is driven by a battery, there is an advantage that the life of the battery can be extended.

In the invention according to claim 1 , since the gas flow detecting means (11) is provided in the bypass line (4), the gas flow detecting means (11)
You can easily check for gas leaks.

In the invention according to claim 2 , since the sub-valve (6) is formed integrally with the gas flow detecting means (11), 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 valve (6) to the bypass line (4) as a single unit. Further, since the number of parts is reduced, there is an advantage that the labor for managing the parts can be omitted.

In the invention according to claim 3 , since the gas flow detection means (11) is constituted by the flow rate measurement type gas flow detection means, the flow rate of the gas flowing through the bypass line (4) can be directly and accurately determined. Can be measured. Therefore, the presence / absence of gas leakage can be accurately and immediately determined.

In the invention according to claim 4 , since the gas flow detection means (11) is constituted by the pressure measurement type gas flow detection means, the gas indirectly flowing through the bypass line (4) depending on the decrease in pressure. The flow rate of the gas can be measured, which allows confirmation of gas leakage. Further, since the gas flow detection means (11) can be constructed with a simple structure for simply measuring the pressure, it is hard to break down and is inexpensive.

In the invention according to claim 5 , the main regulator (9) is provided in the main line (3), the sub regulator (10) is provided in the bypass line (4), and the sub regulator (10). Since the pressure for decompressing is set higher than that of the main regulator (9), if the leak amount of gas is small and this leak amount can be compensated by the flow rate of gas supplied from the bypass line (4). , Sub solenoid valve (10)
Open, but the main regulator (9) remains closed.

Therefore, for example, when the flow rate of the gas flowing through the bypass line (4) or the presence or absence of the gas flow is detected for a long period (for example, 30 days) at intervals of 1 hour, the amount of the gas is changed in each hour unit. If there is data with zero flow, the main line (3) and bypass line (4)
Since there is a time period during which no gas is flowing, it can be determined that no gas leakage has occurred.

However, if there is no data in which the gas flow is zero at any one hourly interval, it can be estimated that a gas leak has occurred.

Therefore, even if it is judged that there is no gas leakage immediately after the earthquake and the supply of gas is started, the presence or absence of the subsequent gas leakage can be continuously inspected by the gas flow detecting means (11). For this reason, for example, even if buried pipes that were about to break due to an earthquake were to be broken due to vibration of an automobile or the like and gas leaks occurred, the gas leaks should be discovered and repaired while the gas leaks are small. Can take measures.

[0161] Also in the invention according to claim 6, claim 5
The same action and effect are obtained.

In the invention according to claim 7 , usually, when a large amount of gas is consumed, the pressure on the downstream side of the main regulator (9) becomes low. Therefore, the differential pressure between the upstream side and the downstream side in the main regulator (9) becomes larger than the minimum operating pressure of the main regulator (9), and the main regulator (9) is opened. However, when the amount of gas used in the supply destination (K) decreases, the pressure on the downstream side of the main regulator (9) increases, and the differential pressure between the upstream side and the downstream side of the main regulator (9) becomes the main adjustment. Below the minimum operating pressure of the device (9), the main regulator (9) is closed.

Therefore, when the gas flow rate is small,
The gas will be supplied to the supply destination (K) through only the bypass line (4). Therefore, claim 6
Similarly to the invention according to the above, by detecting the flow rate of the gas flowing through the bypass line (4) or the presence or absence of the gas flow for a long period at intervals of, for example, 1 hour, the presence or absence of gas leakage is continuously inspected even after the restoration. be able to.

In the invention according to claim 8 , since the main regulator (9) is formed integrally with the main valve (5), there is an advantage that it is compact as a whole and does not take up space. In addition, since the number of parts is reduced, it is possible to save the trouble of attaching to the main line (3) and the trouble of managing the parts.

According to the ninth aspect of the invention, since the sub-regulator (10) is formed integrally with the sub-valve (6), there is an advantage that it is compact as a whole and saves space. In addition, since the number of parts is reduced, it is possible to save the labor for attaching to the sub line (4) and the labor for managing the components.

According to the tenth aspect of the invention, the main regulator (9) and the main valve (5) are constituted by the main regulator valve (17) having the functions of both of them, so that the whole is extremely compact. Become. In addition, the same effect as the invention according to claim 8 is obtained.

In the invention according to claim 11 , since the sub-regulator (10) and the sub-valve (6) are constituted by the sub-regulation valve (18) having both functions, the whole is extremely compact. Become. Others, claim 9
The same effects as those of the invention according to are obtained.

According to the twelfth aspect of the invention, the vibration sensor (7) is provided on the side of the bypass line (4) fixed to the structure.
Since it is provided, it is possible to accurately detect a predetermined seismic intensity that is dangerous. Therefore, it is possible to stop the gas supply before the danger is caused by the earthquake, and it is possible to prevent the trouble that the gas supply is stopped even though it is not dangerous.

According to the thirteenth aspect of the invention, since the seismic shock absorber (7) is provided on the side of the main line (3) whose rigidity is maintained by the pipe, the vibration due to the earthquake is amplified by the pipe, and this amplification The swaying motion will be detected by the seismic sensor (7). Therefore, since the seismoscope (7) operates sensitively, the gas supply can be stopped on the safer side.

Moreover, the seismic sensor (7) and the main valve (5)
Are both on the main line (3) side, even if the positions of the main line (3) and the bypass line (4) are relatively displaced due to an earthquake, the main valve (5) The signal line routed to () does not break. Therefore, there is an advantage that the main line (3) for supplying a large amount of gas can be stopped without fail.

In the invention according to claim 14 , since the seismoscope (7) is provided on each of the main line (3) side and the bypass line (4) side, the seismic shock absorber (7) is connected to the main line (3) by an earthquake. Even if the position with respect to the bypass line (4) is relatively deviated, the signal line wired from the seismograph (7) side to the main valve (5) in the main line (3) and the bypass line (4) Sensitive device (7)
The signal line wired from the side to the sub-valve (6) is not broken. Therefore, the supply of gas can be stopped without fail from the main line (3) and the bypass line (4).

According to the invention of claim 15 , even if any signal line from the seismoscope (7) to the main valve (5) and the sub valve (6) is disconnected, the main valve (5) and the sub valve are disconnected. (6) can be closed. Therefore,
Even if the signal line is broken by the earthquake, the gas supply can be reliably stopped. Also, since gas is not supplied when the signal line is disconnected, the main valve (5) and sub-valve (6) do not operate during an earthquake, for example, because the signal line has already been disconnected. It is possible to prevent such accidents.

As the signal line, for example, if there is a control unit, between the seismoscope (7) and the control unit, and between the control unit and the main valve (5) or the sub valve (6). , The signal lines provided between the main valve (5) and the sub-valve (6), which are all signal lines that will not operate the main valve (5) or the sub-valve (6) if cut off become. The signal line between the main valve (5) and the sub valve (6) may be provided, for example, when a signal is sent from the control unit to the sub valve (6) via the main valve (5).

In the sixteenth aspect of the present invention, since it is possible to confirm whether or not the signal line is disconnected by the disconnection detection means, for example, since the signal line has already been disconnected, the Valve (5) and sub-valve (6)
It is possible to prevent accidents such as that the Further, as the signal lines, as described above, all the signal lines that will not operate the main valve (5) or the sub-valve (6) will be the target.

In the seventeenth aspect of the invention, since the main valve (5) and the sub-valve (6) are constituted by the bidirectional electromagnetic valve, these main valves (5 ) And the sub valve (6) can be opened, which is extremely 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 valve (main solenoid 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) 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 G01F 1/00-1/54 G01F 3/00-9/02 F23N 1 / 00 F16K 17/18-17/34 G01M 3/00-3/40

Claims (17)

(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) connected to a supply destination (K), and a first branch section (3a) and a second branch section (3b) are connected to the main line (3). Between the bypass line (4) connected in parallel with each other and the first branch portion (3a) and the second branch portion (3b) of the main line (3). A main valve (5) that opens and closes, a sub-valve (6) that is installed in the bypass line (4) and that opens and closes the bypass line (4), and a seismic sensation that emits an earthquake signal by detecting an earthquake with a predetermined seismic intensity. (7) and based on the seismic signal In valve (5) and configured to close the sub valve (6), said bypass line (4) is the bypass line
(4) Gas flow detection means (1 for detecting the flow of gas in
Main valve (5) that is equipped with 1) and is closed when an earthquake occurs
And of the sub-valves (6), open only the sub-valve (6)
Confirm the gas leak at the time of restoration with the gas flow detection means (11)
Earthquake-proof gas supply facility characterized by being configured as described above . 2. A sub-valve (6) is a gas flow detection means (1).
The earthquake countermeasure gas supply facility according to claim 1, wherein the gas countermeasure facility is integrated with 1) . 3. A gas flow detecting means (11) is a gas flow rate.
It is composed of a flow rate measuring gas flow detection means for detecting
The anti-earthquake type gas supply facility according to claim 1 or 2, wherein 4. The gas flow detection means (11) has a pressure drop.
Pressure measuring gas flow detector that detects gas flow by
3. The method according to claim 1, further comprising a step.
Is an earthquake countermeasure type gas supply facility according to claim 2 . 5. The main line (3) has a supply destination (K).
Main regulator that reduces the pressure of gas to the specified pressure
(9) is provided, and the bypass line (4) has a supply destination.
Adjust the gas pressure to (K) from the main regulator (9).
A sub regulator (10) for reducing the pressure to a high pressure was provided.
Claim 1, Claim 2, Claim 3, or contract
Earthquake-type gas supply facilities of Motomeko 4 described. 6. The main line (3) has a supply destination (K).
Main regulator that reduces the pressure of gas to the specified pressure
(9) is provided, and the bypass line (4) has a pressure measurement type
A downstream side sub-adjuster (10) is provided on the downstream side of the gas flow detection means.
The downstream side sub-regulator (10) is provided at the destination
Adjust the gas pressure to (K) from the main regulator (9).
Being configured to reduce the pressure to a high pressure
The earthquake countermeasure gas supply facility according to claim 4 . 7. The main line (3) is provided with a check valve.
The minimum operation of the check valve
Depending on the dynamic pressure, the gas pressure to the supply destination (K) can be
The provision of a main regulator (9) for reducing the pressure
Claim 1, Claim 2, Claim 3 or Claim 4 characterized
Earthquake-proof gas supply facility described. 8. The main regulator (9) comprises a main valve (5).
6. It is configured integrally with
The earthquake countermeasure type gas supply facility according to claim 6 or 7 . 9. The sub regulator (10) comprises a sub valve (6) and
6. The structure according to claim 5, wherein the structure is integrally formed.
The anti-earthquake gas supply facility according to claim 6 . 10. Main regulator (9) and main valve
(5) is the main control valve that has both functions.
Claims characterized by being constituted by (17)
The earthquake countermeasure gas supply facility according to claim 5, claim 6 or claim 7 . 11. Sub regulator (10) and sub valve (6).
Is a sub regulator valve (18) that has both of these functions.
6. The method according to claim 5, wherein
The anti-earthquake gas supply facility according to claim 6 . 12. The bypass line (4) side is installed on the ground.
It is fixed to the structure, such as the building or framework in which it is placed.
The seismic device (7) is installed on the bypass line (4) side.
Any of claims 1 to 11 characterized in that
Earthquake countermeasure type gas supply facility described in Crab . 13. The rigidity of the pipe on the main line (3) side
The structure is maintained by the seismic sensor (7)
The earthquake countermeasure gas supply facility according to any one of claims 1 to 12, which is provided on the side of the line (3) . 14. A seismoscope (7) is a main line (3).
On each side and bypass line (4) side
Any one of claims 1 to 11 characterized in that
Earthquake-proof gas supply facility described there . 15. The seismic sensor (7) to the main valve (5) and
The signal line provided up to the sub-valve (6) is broken
The main valve (5) and sub-valve (6) are closed.
Claim 1 thru | or Claim characterized by having comprised as follows.
14. An earthquake countermeasure gas supply facility according to any one of 14 . 16. A disconnection of a signal line provided between the seismograph (7) and the main valve (5) and the sub valve (6).
Contractor characterized by being provided with a disconnection detecting means for detecting
The earthquake countermeasure gas supply facility according to any one of claims 1 to 15 . 17. The main valve (5) and the sub-valve (6) are
Consists of a bidirectional solenoid valve that electrically opens and closes the flow path.
Claim 1 thru | or Claim 16 characterized by the above-mentioned.
Earthquake-proof gas supply facility according to any of the above.