JP6016416B2 - Gas supply system - Google Patents

Description

  The present invention relates to a gas supply system.

  Conventionally, a gas supply system for supplying fuel gas to a plurality of houses such as an apartment house has been proposed. The gas supply system includes a gas flow path for supplying fuel gas from a gas supply source to a plurality of houses, and a plurality of individual gas flow paths for supplying fuel gas flowing through the gas flow paths to a plurality of houses. It has.

  The gas flow path includes a main main flow path and a bypass flow path that bypasses the main flow path, and a leak detection device is provided on the bypass flow path. Then, when the fuel gas flows continuously for 30 days, for example, the leakage detection device determines that there is a suspicion of leakage and issues an alarm or a call.

  In the gas supply system, a parent regulator is installed in the main flow path, and a child regulator whose adjustment pressure is set higher than that of the parent regulator is installed in the bypass flow path. For this reason, when a small flow rate of fuel gas is used or leakage occurs in the home, first, the fuel gas flows through the slave regulator. Thereafter, when the flow rate of the used fuel gas increases, the fuel gas flows through both the parent regulator and the child regulator (see, for example, Patent Documents 1 and 2).

JP-A-3-41300 JP-A-5-296873

  However, in the conventional gas supply system, when an abnormal state such as gas leakage or an earthquake occurs in the gas flow path, the gas meter provided in each household blocks the flow path, but the flow path is blocked on the upstream side of the gas meter. In such a case, a large amount of fuel gas may leak.

  The present invention has been made to solve such conventional problems, and an object of the present invention is to provide a gas supply system capable of preventing a large amount of gas leakage.

The gas supply system of the present invention includes a main flow path for supplying fuel gas from a gas supply source to a plurality of houses, a parent regulator provided in the main flow path, and a bypass flow path that bypasses the main flow path And a gas supply system provided in the bypass flow path and having an adjustment pressure set higher than the adjustment pressure of the parent adjustment device, and an abnormal state detection means for detecting an abnormal state; A flow path blocking means provided at a junction of the fuel gas flowing through the main flow path and the fuel gas flowing through the bypass flow path, and blocking the flow path when an abnormal state is detected by the abnormal state detection means; The parent adjuster is configured to adjust the amount of fuel gas flowing from the main flow path into the decompression chamber through the nozzle portion by operating the first valve body according to the displacement of the diaphragm. The bypass passage is connected to the decompression chamber of the parent regulator, and the passage shut-off means is a second valve body that shuts off fuel gas flowing through the bypass passage to the decompression chamber of the parent regulator. And when the abnormal state is detected by the abnormal state detection means, the second valve body is operated to shut off the fuel gas flowing through the bypass flow path to the decompression chamber of the parent regulator, and By displacing the diaphragm in accordance with the shutoff operation of the second valve body and operating the first valve body, the fuel gas flowing from the nozzle portion to the decompression chamber of the parent regulator through the main flow path is shut off. characterized in that it.

According to this gas supply system, the fuel gas flowing through the main flow channel and the fuel gas flowing through the bypass flow channel are merged at the downstream of the merged point, and at the branch point where the flow is branched to a plurality of houses. A flow path blocking means is provided on the upstream side and blocks the flow path when an abnormal state is detected. For this reason, when an abnormal state such as gas leakage or an earthquake occurs in the gas flow path, the flow path can be blocked by the flow path blocking means, and gas leakage on the downstream side of the location blocked by the flow path blocking means can be prevented. It becomes. Therefore, a large amount of gas leakage can be prevented. Furthermore, the flow path blocking means has a second valve body that blocks fuel gas flowing through the bypass flow path to the decompression chamber of the parent regulator, and displaces the diaphragm in accordance with the operation of the second valve body to move the main flow. The fuel gas flowing from the nozzle part to the decompression chamber of the parent regulator through the path is shut off. For this reason, by operating the second valve body, both the main flow path and the bypass flow path can be blocked by one operation.

In the gas supply system of the present invention, it is preferable that the child adjuster, the entire bypass flow path, the flow path blocking means, and the abnormal state detection means are integrally assembled and unitized.

According to this gas supply system, the sub regulator, the entire bypass flow path, the flow path blocking means, and the abnormal state detection means are assembled into a unit and integrated into a unit. On the other hand, by assembling the unit later, a facility for preventing a large amount of gas leakage can be realized relatively easily.

Further, in the gas supply system of the present invention, the abnormal state detection means is constituted by a microcomputer gas meter, and the bypass flow path extending from the outlet of the microcomputer gas meter among the bypass flow paths is routed on the back side of the microcomputer gas meter. It is preferable that

According to this gas supply system, the bypass channel can be fixed to the wall surface or the like.

In the gas supply system of the present invention, the second valve body is driven by the motor, and the abnormal state detecting means outputs a signal to close the flow path to the motor via the signal line when the abnormal state is detected. By operating the second valve body to shut off the flow path and outputting a signal to open the flow path to the motor via the signal line when an operation switch provided for operation is operated . It is preferable to open the flow path blocked by operating the two- valve body.

According to this gas supply system, by outputting a signal to close the motor valve via the signal line, the second valve body is operated to shut off the flow path, and the operation switch is operated when the operation switch is operated . Open the blocked flow path by operating the two- valve element. For this reason, even if the flow path is interrupted due to the occurrence of an abnormal state, the two flow paths can be opened only by operating the operation switch, and the flow path can be operated by the same operation as when the shut-off valve is opened in the gas meter. Can be opened, and the operation at the time of opening can be facilitated.

  According to the present invention, a gas supply system capable of preventing a large amount of gas leakage can be provided.

It is a lineblock diagram of a gas supply system concerning an embodiment of the present invention. FIG. 2 is a cross-sectional view showing details of a parent regulator and a flow breaker shown in FIG. 1. It is a block diagram which shows a part of gas supply system shown in FIG. 1 in detail, Comprising: (a) is a front view, is a side view. It is a schematic block diagram which shows the modification of the gas supply system which concerns on this embodiment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a gas supply system 1 according to an embodiment of the present invention. In the following, the gas supply system 1 that supplies LP gas as fuel gas will be described as an example. However, the present invention is not limited to this, and the gas supply system 1 may supply city gas.

  The gas supply system 1 is a housing facility that supplies fuel gas from a gas cylinder (gas supply source) 10 to a plurality of houses 2. The gas supply system 1 includes a gas cylinder 10, a gas flow path 20, pressure regulators 30 to 50, an abnormal state detection device (abnormal state detection means) 60, a flow path breaker (flow path cut-off means) 70, It has.

  The gas flow path 20 is a flow path that continues from the gas cylinder 10 to the plurality of houses 2, and includes a main flow path 21 and a bypass flow path 22. The main flow path 21 is a main flow path for supplying fuel gas from the gas cylinder 10 to the plurality of houses 2 side. The bypass flow path 22 bypasses the main flow path 21, and both ends are connected to the main flow path 21.

  The pressure regulators 30 to 50 are provided on the gas flow path 20 and adjust the downstream gas pressure by two states, a closed state and an open state. Among these, the former regulator 30 is provided on the gas cylinder 10 side. The parent adjuster 40 is provided in the main flow path 21. Specifically, the parent adjuster 40 is provided in a portion of the main channel 21 that is bypassed by the bypass channel 22. The child adjuster 50 is provided in the bypass flow path 22 and has an adjustment pressure set higher than the adjustment pressure of the parent adjuster 40.

  The abnormal state detection device 60 detects an abnormal state of the gas supply system 1. The abnormal state detection device 60 is configured by, for example, a microcomputer gas meter, and includes a pressure sensor and a seismic sensor inside. The abnormal state detection device 60 detects a gas leak as an abnormal state based on a pressure value equal to or lower than a threshold value from the pressure sensor, for example, when a gas leak occurs due to a pipe crack or the like. Further, when the abnormal state detection device 60 detects a predetermined vibration or more by the seismoscope, the abnormal state detection device 60 detects this as an abnormal state because there is a possibility of pipe damage due to the earthquake. Furthermore, when detecting an abnormal state, the abnormal state detection device 60 transmits a signal to that effect to the flow path breaker 70 via the signal line 71.

  The flow path breaker 70 blocks the flow path when an abnormal state is detected by the abnormal state detection device 60, and is attached to the back surface of the parent adjuster 40, for example.

  The house-side equipment 100 includes a plurality of individual gas passages 110, a plurality of valves 120, a plurality of gas meters 130, and a plurality of gas appliances 140. The plurality of individual gas passages 110 supplies the fuel gas flowing through the gas passage 20 to the plurality of houses 2. The plurality of individual gas flow paths 110 branch from the gas flow path 20 and supply fuel gas to the plurality of houses 2 respectively.

  The valve 120 is provided at an upstream portion of each individual gas flow path 110. By opening and closing the valve 120, a resident of each house 2 can draw fuel gas into the home.

  The gas meter 130 measures the flow rate of the fuel gas and displays the integrated flow rate. The plurality of gas appliances 140 are a gas stove, a fan heater, a water heater, a floor heating, a gas table, a gas BF bath, and the like.

  In such a gas supply system 1, the fuel gas with a small flow rate does not flow through the parent regulator 40 side and does not flow through the child regulator 50 side due to a difference in adjustment pressure between the parent regulator 40 and the child regulator 50. It will flow. In addition, a large flow rate of fuel gas flows through both the parent regulator 40 and the child regulator 50.

  Here, in the present embodiment, the downstream side of the bypass flow path 22 is connected to the parent regulator 40. More specifically, the downstream side of the bypass flow path 22 is connected to the decompression chamber of the parent regulator 40. For this reason, the fuel gas flowing through the bypass flow path 22 flows into the decompression chamber of the parent regulator 40. Further, the flow path breaker 70 has both the fuel gas flowing into the decompression chamber in the parent regulator 40 through the main flow path 21 and the fuel gas flowing into the decompression chamber in the parent regulator 40 through the bypass flow path 22. Is configured to shut off.

  FIG. 2 is a cross-sectional view showing details of the parent regulator 40 and the flow path breaker 70 shown in FIG. As shown in FIG. 2, the parent regulator 40 has a gas inlet channel 41a of an inlet pipe 41 provided on the fuel gas inlet side, and a gas outlet channel 42 on the outlet side. The pressure of the fuel gas received from 41a is adjusted and discharged from the gas outlet channel 42.

  This parent adjuster 40 is roughly composed of a main body 40a, a cover 40b, a diaphragm 40c, an operating rod 40d, a compression coil spring 40e, an operation lever 40f, a support shaft 40g, a valve body 40h, an action pin 40i, a nut 40j, and a safety valve adjustment. A spring 40k, a valve body 40l of a safety valve, a spring receiver 40m, a washer 40n, and a cap 40o are provided.

  The main body 40a is a main part of the parent adjuster 40, and is connected to the above-described inlet pipe 41 and a gas outlet channel 42 is formed. The cover 40b is a member that covers the opening A of the main body 40a, and is fixed to the main body 40a. The diaphragm 40c is a thin film member whose peripheral portion is fixed to a connection portion between the main body portion 40a and the cover portion 40b. The decompression chamber B and the atmospheric chamber C are airtightly partitioned by the diaphragm 40c.

  The operating rod 40d is a member that penetrates up and down in the center of the diaphragm 40c. The compression coil spring 40e is a spring member interposed between the diaphragm 40c and the cover 40b. The diaphragm 40c is biased toward the decompression chamber B by the compression coil spring 40e.

  The operation lever 40f is a rod-like member connected to the operating rod 40d. The support shaft 40g is a member provided on the side opposite to the connection side of the operating rod 40d of the operation lever 40f. The operation lever 40f is rotatable about the support shaft 40g. The valve body 40h adjusts the fuel gas from the nozzle portion 41b communicating with the gas inlet channel 41a. The valve body 40h is connected to the action pin 40i.

  The nut 40j is screwed to the side (atmosphere chamber C side) opposite to the connection side of the operating lever 40f of the operating rod 40d, and a safety valve adjustment spring 40k is interposed between the nut 40j and the diaphragm 40c. The valve body 40l of the safety valve is provided on the decompression chamber B side in the middle portion of the operating rod 40d, and is urged toward the decompression chamber B side by the safety valve adjustment spring 33.

  The spring receiver 40m is provided on the cover 40b, and the compression coil spring 40e biases the diaphragm 40c toward the decompression chamber B via the spring receiver 40m. The washer 40n is a member that is formed on the upper surface of the diaphragm 40c and receives the safety valve adjustment spring 40k. The cap 40o is a member provided at the upper end portion of the cover 40b.

  Such a parent regulator 40 regulates the pressure of the fuel gas as follows. First, it is assumed that the fuel gas flows into the decompression chamber B through the nozzle portion 41b and the pressure on the decompression chamber B side increases. At this time, the diaphragm 40c is displaced toward the atmospheric chamber C against the urging force of the compression coil spring 40e. Thereby, the operating rod 40d is also displaced to the atmosphere chamber C side, and the operation lever 40f is rotated counterclockwise in FIG. 2 about the support shaft 40g. Due to this rotation operation, the valve body 40h moves to the left in the figure to reduce the amount of gas inflow from the nozzle portion 41b.

  When the gas inflow amount decreases, the pressure on the decompression chamber B side decreases. At this time, the diaphragm 40c is displaced to the decompression chamber 40B side by the urging force of the compression coil spring 40e. As a result, the operating rod 40d is also displaced toward the decompression chamber B, and the operation lever 40f rotates in the clockwise direction in FIG. 2 about the support shaft 40g. By this rotation operation, the action pin 40i connected to the valve body 40h is pulled, and the valve body 40h moves in the right direction in the figure to increase the gas inflow amount from the nozzle portion 41b.

  As described above, the parent adjuster 40 adjusts the pressure. The original adjuster 30 and the child adjuster 50 have the same configuration, and the pressure is adjusted by the same operation.

  The flow path breaker 70 is attached to such a parent regulator 40. As shown in FIG. 2, the parent adjuster 40 has an opening 40p, and the casing 72 of the flow path breaker 70 covers the opening 40p. Further, the bypass flow path 22 is connected to the casing 72, and the fuel gas flowing through the bypass flow path 22 flows into the decompression chamber B of the parent regulator 40 through the opening 40p.

  The flow path breaker 70 includes a motor valve 73. The motor valve 73 includes a motor 73a and a valve body 73b. The motor 73a operates when it receives a signal to close the flow path from the abnormal state detection device 60, and moves the valve body 73b to the parent regulator 40 side. The valve body 73b is configured to close the opening 40p and push the operating rod 40d of the parent adjuster 40 toward the atmosphere chamber C when moved by the motor 73a.

  Further, when the valve body 73b is pushed into the atmosphere chamber C side, the operating rod 40d is largely moved toward the atmosphere chamber C side, and the diaphragm 40c is greatly displaced. At this time, the operating lever 40f connected to the operating rod 40d also rotates greatly counterclockwise, and the nozzle portion 41b is completely blocked by the valve body 40h.

  Further, the motor 73a operates upon receiving a signal to open the flow path from the abnormal state detection device 60, and moves the valve body 73b to the opposite side to the parent adjuster 40. As a result, the parent adjuster 40 returns to the normal state and adjusts the pressure of the fuel gas flowing through the main flow path 21. The abnormal state detection device 60 is provided with an operation switch 61 so as to be operable. When the operation switch 61 is pressed, a signal indicating that the flow path is opened is output from the abnormal state detection device 60.

  The configuration of the flow path breaker 70 is not limited to the above, and for example, a configuration in which a valve body is provided in the gas outlet flow path 42 to open and close the gas outlet flow path 42 may be used. In the example shown in FIG. 2, the bypass flow path 22 is indirectly connected to the decompression chamber B of the parent adjuster 40 via the housing 72, but is not limited thereto, and is directly connected to the decompression chamber B. It may be a structure.

  FIG. 3 is a configuration diagram showing a part of the gas supply system 1 shown in FIG. 1 in detail, in which (a) is a front view and FIG. 3 is a side view. As shown in FIG. 3A, the child adjuster 50 in the gas supply device 1 is provided in the vicinity of the inlet of the bypass flow path 22. Moreover, the abnormal condition detection apparatus 60 is comprised by the microcomputer gas meter, and the bypass flow path 22 extended from the exit is wired by the back side of the abnormal condition detection apparatus 60, and has a structure which can be fixed to a wall surface etc. Further, the outlet side of the bypass flow path 22 is constituted by a flexible pipe 22 a such as a rubber pipe, and the flexible pipe 22 a is connected to the flow path breaker 70.

  Further, the child adjuster 50, the bypass flow path 22, the flow path breaker 70, and the abnormal state detection device 60 (that is, the configuration within the broken line in FIG. 3A) are assembled together and unitized. For this reason, the configuration within the broken line can be attached relatively easily even to a gas supply system that does not have the configuration within the broken line.

More specifically, the operator first closes the valve of the gas cylinder 10 and opens an opening in the main flow path 21 between the original regulator 30 and the parent regulator 40 and a portion connected to the decompression chamber B of the parent regulator 40. formed, attaching the inlet side of the bypass passage 22 to the opening of the main flow passage 21. The operator covers the opening 40p of the parent adjuster 40 with the housing 72 of the flow path breaker 70. Thereby, the structure in a broken line can be attached comparatively easily also to the gas supply system which is not provided with the structure in a broken line.

  Next, the operation of the gas supply system 1 according to this embodiment will be described. First, it is assumed that the user of each household 2 uses the gas appliance 140 and the fuel gas is supplied to the gas appliance 140. At this time, if the flow rate of the fuel gas is relatively small, the fuel gas flows only through the slave regulator 40 (bypass passage 22) due to the difference in the adjustment pressure between the master regulator 40 and the slave regulator 50. Become.

  Thereafter, it is assumed that the gas appliance 140 is newly used by a user in another home 2 and the flow rate of the fuel gas becomes relatively large. At this time, the fuel gas flows not only on the child adjuster 40 side but also on the parent adjuster 40 side.

  Further, it is assumed that piping breakage or the like has occurred on the downstream side of the parent adjuster 40 and the child adjuster 50. In this case, the abnormal state detection device 60 determines a large amount of gas leakage from the pressure drop of the internal pressure sensor. Then, the abnormal state detection device 60 transmits a signal for closing the flow path to the flow path breaker 70 via the signal line 71. When this signal is received, the motor valve 73 of the flow path breaker 70 operates the valve element 73b to close the opening 40p, and pushes the operating rod 40d of the parent adjuster 40 toward the atmosphere chamber C. As a result, the fuel gas flowing through the main flow path 21 and the fuel gas flowing through the bypass flow path 22 are blocked in the decompression chamber B serving as a junction.

  Also, when an earthquake of a predetermined level or more occurs in the area where the gas supply system 1 is installed, similarly to the above, the abnormal state detection device 60 operates the valve body 73b of the motor valve 73 to close the opening 40p, The operating rod 40d of the parent adjuster 40 is pushed into the atmosphere chamber C and the two flow paths 21, 22 are blocked.

  Thus, according to the gas supply system 1 according to the present embodiment, when the abnormal condition is detected, the fuel gas flowing through the main flow path 21 and the fuel gas flowing through the bypass flow path 22 are merged. A flow path breaker 70 that blocks the flow path is provided. For this reason, when an abnormal state such as a gas leak or an earthquake occurs in the gas flow path 20, the flow path can be blocked by the flow path breaker 70, and the gas leaks on the downstream side of the location blocked by the flow path breaker 70. Can be prevented. Therefore, a large amount of gas leakage can be prevented.

  Further, since the child adjuster 50, the bypass flow path 22, the flow path breaker 70, and the abnormal state detection device 60 are integrated and unitized, a unit is provided for a gas supply system that does not have the above configuration. By assembling, a facility for preventing a large amount of gas leakage can be realized relatively easily.

  The flow path breaker 70 has a valve body 73b that blocks the fuel gas flowing into the decompression chamber B of the parent regulator 40 via the bypass flow path 22, and displaces the diaphragm 40c in accordance with the operation of the valve body 73b. Then, the fuel gas flowing through the main flow path 21 to the decompression chamber B of the parent regulator 40 is shut off. For this reason, the flow path of both the main flow path 21 and the bypass flow path 22 can be shut off by one operation by operating the valve body 73b.

  Further, by outputting a signal to close the motor valve 73 via the signal line 71, the valve body 73b is operated to shut off the flow path, and when the operation switch 61 is operated, the valve body 73b is operated. The blocked flow path is opened. For this reason, even if the flow path is blocked due to the occurrence of an abnormal state, the two flow paths can be opened simply by operating the operation switch 61, and the flow is performed by the same operation as when the shut-off valve is opened in the gas meter. The road can be opened, and the operation at the time of opening can be facilitated.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention.

  For example, in the present embodiment, the abnormal state detection device 60 includes a pressure sensor. However, the present invention is not limited to this, and the parent adjuster 40 and the child adjuster 50 include a pressure sensor, and a signal from the pressure sensor is detected as an abnormal state. An input may be made to the device 60.

  The gas supply system 1 may be configured as shown in FIG. FIG. 4 is a schematic configuration diagram illustrating a modification of the gas supply system 1 according to the present embodiment. In the gas supply system 1 according to FIG. 1, the junction of the fuel gas flowing through the main flow path 21 and the fuel gas flowing through the bypass flow path 22 is the decompression chamber B of the parent regulator 40, and the flow path breaker 70 is the decompression chamber The fuel gas flowing into B was cut off. However, the present invention is not limited to this, and the joining point is not limited to the decompression chamber B as shown in FIG. That is, the bypass flow path 22 may be connected to the main flow path 21 on the downstream side of the parent adjuster 40, and this connection location may be a merge location. Further, the flow path breaker 70 may not be configured to block the fuel gas flowing into the joining location, and may be configured to shut off on the downstream side of the joining location. In addition, it cannot be overemphasized that this interruption | blocking location is an upstream of the branch location where a flow path is branched to the some house 2 side.

DESCRIPTION OF SYMBOLS 1 ... Gas supply system 2 ... House 10 ... Gas cylinder (gas supply source)
20 ... Gas channel 21 ... Main channel 22 ... Bypass channel 30 ... Original regulator 40 ... Parent regulator 40a ... Main body 40b ... Cover 40c ... Diaphragm 40d ... Actuation rod 40e ... Compression coil spring 40f ... Operation lever 40g ... Support shaft 40h ... Valve body 40i ... Working pin 40j ... Nut 40k ... Safety valve adjusting spring 40l ... Safety valve body 40m ... Spring receiver 40n ... Washer 40o ... Cap 40p ... Opening 41 ... Inlet pipe 41a ... Gas inlet channel 41b ... Nozzle part 42 ... Gas outlet channel 42
50 ... Child adjuster 60 ... Abnormal state detecting device (abnormal state detecting means)
61 ... Operation switch 70 ... Flow path breaker (flow path blocking means)
71 ... Signal line 72 ... Housing 73 ... Motor valve 73a ... Motor 73b ... Valve body 100 ... Housing-side equipment 110 ... Multiple individual gas flow paths 120 ... Multiple valves 130 ... Multiple gas meters 140 ... Multiple gas appliances A ... Opening B ... decompression chamber C ... atmospheric chamber

Claims (4)

A main flow path for supplying fuel gas from a gas supply source to a plurality of houses, a parent regulator provided in the main flow path, a bypass flow path for bypassing the main flow path, and a bypass flow path A gas supply system comprising: a child regulator whose adjustment pressure is set higher than the adjustment pressure of the parent regulator;
An abnormal state detecting means for detecting an abnormal state;
Provided at the confluence point of the fuel gas flowing through the fuel gas flowing through the main flow path through the bypass passage, and a flow path blocking means for blocking the flow path when the abnormal state is detected by said abnormality detecting means Prepared,
The parent adjuster is a structure for adjusting the amount of fuel gas flowing into the decompression chamber from the main flow path through the nozzle portion by operating the first valve body according to the displacement of the diaphragm,
The bypass flow path is connected to the decompression chamber of the parent regulator,
The flow path blocking means includes a second valve body that blocks fuel gas flowing through the bypass flow path to the decompression chamber of the parent regulator, and the abnormal state detection means detects the abnormal state when the abnormal state is detected. The second valve body is operated to shut off the fuel gas flowing into the decompression chamber of the parent regulator through the bypass flow path, and the diaphragm is displaced in accordance with the shut-off operation of the second valve body. By operating the valve body, the fuel gas flowing from the nozzle portion to the decompression chamber of the parent regulator through the main flow path is shut off.
A gas supply system characterized by that . The gas supply system according to claim 1, wherein the child adjuster, the entire bypass flow path, the flow path blocking means, and the abnormal state detection means are assembled and united. The abnormal state detection means is constituted by a microcomputer gas meter,
The bypass channel extending from the outlet of the microcomputer gas meter among the bypass channels is routed on the back surface side of the microcomputer gas meter . Gas supply system. The second valve body is driven by a motor;
The abnormal state detecting means operates the second valve body by shutting off the flow path by outputting a signal indicating that the flow path is closed to the motor via a signal line when an abnormality is detected, When the operation switch provided is operated, a signal indicating that the flow path is opened is output to the motor via a signal line, thereby opening the flow path blocked by operating the second valve body. gas supply system according to any one of claims 1 to 3, characterized in.

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