JPH062495U - Automatic shutoff valve system - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide an automatic shutoff valve system that can temporarily restore the gas supply by a specific operation even if the gas shutoff valve is shut off when a system abnormality is detected. . [Arrangement] An alarm device 10 that outputs a detection signal when a gas leak is detected, a transmitter 20 that is provided inside the house and transmits a detection signal from the alarm device 10, and an alarm device 10 that is provided outside the house and is transmitted from the transmitter 20. The shut-off valve control unit 40 shuts off an alarm shut-off valve control unit 40 that includes a receiving unit 30 that receives a signal and a shut-off valve control unit 40 that shuts off the shut-off valve 42 when a shut-off signal is detected from the received signal. When the valve 42 is shut off, shutoff valve returning means 1 and 2 for restoring the shutoff valve 42 by temporarily stopping the shutoff signal by a specific operation are provided. As a result, the gas can be used temporarily even when the system is abnormal.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic shutoff valve system, and more particularly to an automatic shutoff valve system capable of returning the shutoff valve by a specific operation when the shutoff valve is automatically shut off when a gas leak is detected or a power failure occurs.

[0002]

[Prior art]

 Conventionally, some gas meters have a built-in shutoff valve for security purposes that shuts off the gas supply in the event of a gas leak during an earthquake or disaster. In this security gas meter, when a gas alarm detects a gas leak, the detection signal is output by communication from the transmission unit, and when the reception unit placed outdoors receives this detection signal, Some gas meters have a built-in microcomputer that automatically shut off the gas.

FIG. 4 shows a configuration of a conventional automatic shutoff valve system linked with an alarm device. In FIG. 4, reference numeral 10 denotes a gas alarm device having a voltage output type installed indoors, 20 denotes a transmitting unit connected to the gas alarm device 10 having a voltage output type, 30 denotes a receiving unit installed outdoors, and 40 denotes this receiving unit. It is a gas meter connected to 40.

When a gas leak is detected, the voltage-output gas alarm device 10 issues an alarm and outputs a gas leak detection signal. The transmitter 20 includes a power circuit 21, a signal discriminator 22, a transmitter circuit 23, and a transmitter coil 24. In addition, the receiving unit 30 includes a receiving coil 31, a tuning receiving unit 32, a power circuit 33, and a cutoff signal detection circuit 34. Further, the gas meter 40 is provided with a microcomputer 41 and a gas cutoff valve 42.

In the automatic shutoff valve system interlocked with the alarm device configured as described above (hereinafter referred to as the alarm interlocking system), relays by electromagnetic coupling such as the transmission coil 24 and the reception coil 31 are provided in the interlocking mechanism. Equipment intervenes. In this system, the gas meter 4 is closed so that the gas cutoff valve 42 is closed for safety when the system malfunctions, that is, when the electromagnetic coupling becomes unstable, gas leak is detected, or a power failure occurs. 0 works.

The shutoff operation of the gas shutoff valve 42 when the system is abnormal will be described with reference to the flowcharts of FIGS. 5 and 6.

FIG. 5 shows an example of the operation of the transmission unit 20 in the alarm interlocking system of FIG. In step 501, first, it is determined whether or not there is a power failure. If it is not a power failure, it is determined in step 502 whether or not there is a gas leak detection signal from the voltage output gas alarm device 10. When there is no gas leak detection signal (NO), the process proceeds to step 503, and the transmission coil 24 is excited. On the other hand, if it is determined in step 501 that a power failure has occurred, or if it is determined in step 502 that there is a gas leak detection signal from the voltage output gas alarm device 10, the process proceeds to step 504 and the transmission coil is sent. The excitation of 24 is stopped.

FIG. 6 shows an example of the operation of the receiving unit 30 in the alarm interlocking system of FIG. In step 601, first, it is determined whether or not the receiving coil 31 has an induced voltage. The induced voltage of the receiving coil 31 is generated when the transmitting coil 24 is excited, and disappears when the exciting of the transmitting coil 24 is stopped. Therefore, if it is determined in step 601 that the receiving coil 31 has an induced voltage (YES), the process proceeds to step 602, and the cutoff signal is turned off and is not output. On the other hand, if it is determined in step 601 that the receiving coil 31 has no induced voltage (NO), the process proceeds to step 603, and the interruption signal is turned on.

When the shutoff signal is turned on, the gas shutoff valve 42 is shut off when the system is abnormal. Examples of system abnormalities include a power failure, disconnection of an outlet, interruption of power supply to the voltage output gas alarm 10 due to wire breakage, or detection of a gas leak by the voltage output gas alarm 10. is there.

[0010]

[Problems to be solved by the device]

 However, in the alarm interlocking system configured as described above, once the gas is shut off when the system is abnormal, this shutoff continues until the cause of the shutoff is identified and released. Had a problem that gas could not be used until the cause of interruption was determined.

Therefore, the present invention provides an automatic shutoff valve in an alarm interlocking system that can temporarily restore the gas supply by a specific operation even if the gas shutoff valve is shut off when an abnormality is detected in the system. The purpose is to provide a system.

[0012]

[Means for Solving the Problems]

 The automatic shut-off valve system of the present invention which achieves the above-mentioned object, includes an alarm means for outputting a detection signal when a gas leak is detected, a transmitting means provided inside a house for transmitting a detection signal from the alarm means, and a house. In an automatic shutoff valve system interlocked with an alarm device, which is provided outdoors and includes a receiving means for receiving a signal from the transmitting means and a shutoff valve control means for shutting off a shutoff valve when a shutoff signal is detected from the received signal. A shutoff valve returning means is provided for temporarily shutting off the shutoff signal by a specific operation to restore the shutoff valve when the shutoff valve is shut off by the shutoff valve control means.

[0013]

[Action]

 According to the automatic shut-off valve system of the present invention, even when the gas shut-off valve is automatically shut off when the system is abnormal, the shut-off signal is eliminated and temporarily shut off by a specific operation of the gas user. The valve can be reset.

[0014]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the configuration of an embodiment of the automatic shutoff valve system of the present invention, and the same components as those of the conventional automatic shutoff valve system shown in FIG. 4 are designated by the same reference numerals.

In FIG. 1, reference numeral 10 is a voltage output gas alarm device installed indoors, 20 is a transmission unit connected to the voltage output gas alarm device 10, 30 is a reception unit installed outdoors, and 40 is It is a gas meter connected to the receiver 40.

When a gas leak is detected, the voltage-output gas alarm device 10 issues an alarm and outputs a gas leak detection signal. The transmitter 20 includes a power circuit 21, a signal discriminator 22, a transmitter circuit 23, and a transmitter coil 24. In addition, the receiving unit 30 includes a receiving coil 31, a tuning receiving unit 32, a power circuit 33, and a cutoff signal detection circuit 34. Further, the gas meter 40 is provided with a microcomputer 41 and a gas cutoff valve 42. In addition to the above configuration, in this embodiment, a cutoff signal cut circuit 2 operated by the key switch 1 is provided between the receiver 30 and the gas meter 40.

In the automatic shutoff valve system configured as described above, a relay device by electromagnetic coupling such as the transmission coil 24 and the reception coil 31 is interposed in the system. In this system, in the event of abnormal operation of the system, that is, in the event of instability of electromagnetic coupling, detection of gas leakage, power failure, etc., the gas shutoff valve 42 is closed for safety. Works.

The key switch 1 and the cutoff signal cut circuit 2 described above may be provided integrally with the receiver 30 or the gas meter 40. Here, as an example, a case where the reception unit 30, the key switch 1, and the cutoff signal cut circuit 2 are provided in the gas meter 40 will be described with reference to FIG.

FIG. 2A shows a front view of the gas meter 40, and shows that the upper lid 43 of the gas meter 40 is provided with a keyhole 44. FIG. 2B is a side view of the gas meter 40, and shows that when the dedicated key is inserted into the keyhole 44, the upper lid 43 opens as shown by the dotted line.

Then, when the upper lid 43 is opened as shown in FIG. 2B, the key switch 1 shown in FIG. 1 is turned on, and the cutoff signal cut circuit 2 cuts off the cutoff signal from the reception unit 30. If you want to use the gas temporarily when shutting off the gas, open the upper lid 43 with a special key to cut off the shutoff signal from the receiving unit 30 to the gas meter 40 by the shutoff signal cut circuit 2. Then, the gas cutoff valve 42 is opened to temporarily use the gas. Further, since the upper lid 43 of the gas meter 40 is in an open state, it is possible to easily confirm the temporary gas usage state during gas shutoff.

The shutoff operation and the temporary restoration operation of the gas shutoff valve 42 at the time of abnormality of the automatic shutoff valve system configured as described above will now be described. The transmission unit in the automatic shutoff valve system of FIG. Since the operation of 20 is the same as that of the flowchart shown in FIG. 5, the description thereof will be omitted.

FIG. 3 shows an example of the operation of the receiving unit 30 in the automatic shutoff valve system of FIG. In step 301, it is first determined whether the key switch 1 is on. Then, when the key switch 1 is not turned on, the routine proceeds to step 302, where it is judged if the receiving coil 31 has an induced voltage. The induced voltage of the receiving coil 31 is generated when the transmitting coil 24 is excited, and disappears when the exciting of the transmitting coil 24 is stopped. Therefore, when it is determined in step 302 that the receiving coil 31 has an induced voltage (YES), the process proceeds to step 303, and the cutoff signal is turned off and is not output. On the other hand, when it is determined in step 302 that the receiving coil 31 has no induced voltage (NO), the process proceeds to step 304, and the cutoff signal is turned on.

When the shutoff signal is turned on, the gas shutoff valve 42 is shut off when the key switch 1 is not turned on due to an abnormality of the system. Examples of system abnormalities include a power failure, disconnection of an outlet, interruption of power supply to the voltage output gas alarm 10 due to wire breakage, or detection of a gas leak by the voltage output gas alarm 10. .

On the other hand, even if the gas shutoff valve 42 is shut off when the system is abnormal as described above, if it is determined in step 301 that the key switch 1 is turned on, the process proceeds to step 303 and the shutoff signal is turned off. Will not be output. Therefore, according to the present invention, when the gas shutoff valve 42 is shut off, the gas is temporarily used if the above-mentioned specific operation, that is, the operation of opening the upper lid 43 of the gas meter 40 by the key is performed. Will be able to.

Further, when the gas is temporarily restored when the power is cut off, if the gas meter 40 side is provided with a mechanism for automatically closing the upper lid 43 of the gas meter 40 when the power is restored, the safety is further improved. Will increase.

[0027]

[Effect of device]

 As described above, according to the present invention, there is an effect that the gas supply can be temporarily restored by a specific operation even when the gas shutoff valve is shut off when an abnormality is detected in the system.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of an automatic shutoff valve system of the present invention.

FIG. 2 (a) is a front view of an embodiment of a gas meter, and FIG. 2 (b) is a side view showing a state in which a gas meter upper lid is closed and an open state.

FIG. 3 is a flowchart showing a temporary restoration procedure of the automatic shutoff valve system of the present invention.

FIG. 4 is a block diagram showing a configuration of an example of a conventional alarm interlocking system.

5 is a flowchart showing the operation of the transmission unit in FIG.

FIG. 6 is a flowchart showing an operation of the receiving unit in FIG.

[Explanation of symbols]

 1 Key Switch 2 Cutoff Signal Cut Circuit 10 Voltage Output Gas Alarm 20 Transmitter 22 Signal Discriminator 23 Transmitter Circuit 24 Transmitter Coil 30 Receiver 31 Receiver Coil 32 Tuning Receiver 34 Interruption Signal Detector 40 Gas Meter 41 Microcomputer 42 Gas shutoff valve

Claims (1)

[Scope of utility model registration request] 1. An alarm means for outputting a detection signal when a gas leak is detected, a transmitting means provided inside a house for transmitting a detection signal from the alarm means, and an alarm means provided outside the house for transmitting from the transmitting means. In an automatic shutoff valve system interlocked with an alarm device, which includes a receiving means for receiving a signal and a shutoff valve control means for shutting off the shutoff valve when a shutoff signal is detected from the received signal, the shutoff valve is controlled by the shutoff valve control means. An automatic shut-off valve system comprising shut-off valve restoring means for temporarily shutting off the shut-off signal and restoring the shut-off valve when a shut-off is performed.