JPH062000U - Operation device for gas emergency shutoff valve - Google Patents

Abstract

(57) [Summary] [Purpose] A gas that allows specialists to grasp the exact situation when restoring the gas emergency shutoff valve after the valve is closed, and to clarify the responsibility. An operating device for an emergency shutoff valve is provided. [Structure] The shutoff valve 15 is closed when the solenoid 15a is energized, and the shutoff valve 15 has a contact 1 for detecting valve opening / closing.
5b is provided. Recovery circuit 18a of control circuit 18
When the recovery signal is turned on, the latch release signal is output to the latch circuits 42 and 44 when neither the gas leak sensor 11 nor the seismic sensor 12 outputs the detection signal.
The reception lamp 25 of the seismic sensor 12 and the reception lamp 28 of the gas leak sensor 11 are turned off to stop the output to the transfer device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an operating device for a gas emergency shutoff valve, which detects a gas leak or an earthquake motion and automatically drives the gas emergency shutoff valve to be closed by a switch operation.

[0002]

[Prior art]

 Conventionally, as this type of gas emergency shutoff valve operating device, for example, the one shown in FIG. 5 is known. In FIG. 5, reference numeral 1 denotes an operating device, which externally connects the seismic sensor 2 and the gas leak sensor 3. Further, for example, two gas emergency shutoff valves 4 are connected to the operation device 1 as a control load. The operating device 1 is provided with an alarm display section 5, and when it receives a detection signal from the seismic sensor 2 or a detection signal from the gas leak sensor 3, the corresponding indicator lamp is turned on and an audible alarm is issued by a buzzer.

The control of the gas emergency shutoff valve 4 includes an interlocking mode and a non-interlocking mode. For example, when the interlocking mode is set for the seismic shock absorber 4, the gas emergency shutoff valve 4 is automatically closed and driven in synchronization with the reception of the detection signal from the seismic shock absorber 2. On the other hand, when the non-active mode is set, the gas emergency shutoff valve 4 is not automatically closed and driven, but the alarm display unit 5 displays and the valve operation display unit 6 manually shuts off the gas emergency shutoff. The closing drive of the valve 4 can be performed.

Then, the valve operation display unit 6 displays that the closing drive of the gas emergency shutoff valve 4 has been manually performed, and when it is confirmed that the gas leakage or the like does not actually occur. When the recovery switch 6a is operated, the display of the alarm display section 5 and the audible alarm are turned off and stopped. The reason for setting the non-interlocking mode is that a large amount of labor is required to confirm that once the gas emergency shutoff valve installed in the mains of gas intake to the building is closed, it will be safe to reopen the valve. In this situation, the administrator checks the alarm display, confirms the situation inside the building, and then determines whether it is necessary to close the valve. This is because the closing drive is performed.

[0005]

[Problems to be solved by the device]

 However, in the above-described conventional gas emergency shutoff valve operating device, when the valve is closed, the display of each of the above events is restored when the valve is closed by operating the restore switch 6a, so the valve is closed due to a malfunction of the device. It is not possible to know the exact situation when restoring the gas emergency shutoff valve because it is not possible to know whether it was closed by the detection signal of the seismic sensor or the gas leak sensor or by manual operation. Also, there is a problem that responsibility is not clear.

[0006] Here, in detail, the problem in the case where the valve is accidentally closed will be described. In this case, before opening the valve again, are all the main taps of the end of the gas range, the water heater, etc. closed? In addition, it is necessary to check the condition of cracks in the pipes and whether gas leakage has actually occurred, which requires a great deal of labor. Also, if the valve closes, for example, during a department store operation or during lunch at a restaurant, it will cause a great deal of damage even if no gas leak has actually occurred.

Therefore, when the responsibility is not clear, it is a question of which manufacturer or handling shop of the seismic sensor 2, the gas leak sensor 3, the operating device 1, and the shutoff valve 4 should bear the damage cost. . The present invention has been made in view of such conventional problems, and when the valve is closed, an expert can grasp an accurate situation when the gas emergency shutoff valve is restored, and The purpose is to provide an operating device for a gas emergency shutoff valve that can clarify the responsibility.

[0008]

[Means for Solving the Problems] In order to achieve this object, the following configuration is provided. A seismic sensor that detects an earthquake motion and outputs an earthquake detection signal and a gas leak sensor that detects a gas leak and outputs a gas leak detection signal can be connected. In a gas emergency shutoff valve operating device equipped with a control unit for closing and driving the gas emergency shutoff valve based on manual operation, in the case where the seismic sensor detects an earthquake motion or the gas leak sensor leaks gas. In the case where the display means for continuously displaying the fact when it is detected, the valve opening / closing detecting means provided on the gas emergency shutoff valve side, and the restoration signal from the valve opening / closing detecting means are received, It is characterized in that it is equipped with a leak sensor and a restoration means for restoring the display of the display means only when the detection signal from the seismic sensor is not received.

In addition, when a manual operation for closing and driving the gas emergency shutoff valve is performed and a message to that effect is displayed, or when each detection signal of the seismic sensor or the gas leak sensor is notified to an external transfer device This indication and notification are restored only when the restoration signal from the valve opening / closing detection means is received and the detection signals from the gas leak sensor and the seismic sensor are not received.

[0010]

[Action]

 According to the gas emergency shutoff valve operating device of the present invention having such a configuration, when the gas emergency shutoff valve is opened after being closed, a recovery signal from the valve opening / closing detection means provided on the gas emergency shutoff valve side is provided. Is received and the detection signals from the gas leak sensor and the seismic sensor are not received, the seismic sensor, gas leak sensor reception display, manual operation display, and external notification The notification to the device is restored so that it is possible to know whether the valve was closed due to a malfunction of the device or a detection signal from a seismic sensor or gas leak sensor or a manual operation. Therefore, when the gas emergency shutoff valve is restored, it is possible for the expert to know the exact situation and to clarify the responsibility.

[0011]

【Example】

 FIG. 1 is an explanatory view showing the overall configuration of the present invention. In FIG. 1, reference numeral 10 denotes an operating device, and a gas leak sensor 11 and, for example, a non-latching vibrator 12 are externally connected to the operating device 10. The operating device 10 is provided with a gas leak receiving circuit 13 corresponding to the gas leak sensor 11, and the operating device 10 is provided with a seismic receiving circuit 14 corresponding to the non-latching seismic detector 12.

The non-latching seismic sensor 12 has a function of outputting an earthquake detection signal when an earthquake motion exceeding a predetermined value is detected, and when the earthquake motion falls below a predetermined value, the output after the earthquake detection is stopped. . On the other hand, the latch seismometer has a structure that, once an earthquake motion exceeding a predetermined value is detected, it continues to output the earthquake detection signal even if the earthquake subsides. Further, a gas emergency shutoff valve 15 is externally connected to the operating device 10 as a control load, and is closed and driven by a valve drive circuit 16. The gas emergency shutoff valve 15 is usually provided in the portion of the gas intake main for the building, and the valve drive circuit 16 supplies electricity to the solenoid 15a to close and drive the gas emergency shutoff valve 15 to supply gas to the entire building. Can be cut off.

Although only one gas emergency shutoff valve 15 is shown in this embodiment, a plurality of gas emergency shutoff valves 15 can be provided according to the number of gas inlet mains, and the gas emergency shutoff valve 15 can be provided. An independent valve drive circuit 16 is provided for each valve shutoff 15. In this embodiment, the gas emergency shutoff valve 15 side is provided with a contact 15b serving as a valve open / close detection means for detecting the open / closed state of the valve. When the contact 15b is closed by opening the valve, a recovery signal is sent to the control circuit 18. It is sent to the recovery circuit 18a.

Further, the operating device 10 is provided with a transfer circuit 17. The transfer circuit 17 is a circuit which outputs an alarm output corresponding to each when a gas leak is detected by the gas leak sensor 11 or an earthquake is detected by the non-latching seismic sensor 12, to an external transfer device, for example, by a relay contact output. Transfer notification output. The overall control of the operating device 10 is performed by the control circuit 18. The control circuit 18 is provided with a display operation section 19 provided with various kinds of indicator lights and switches, and in particular, the display operation section 19 is manually operated to drive the gas emergency shutoff valve 15 to be closed, as will be described later. When the operation is performed, a manual operation display means 19a is provided for displaying that fact and continuing this display until an extinguishing signal from the restoration circuit 18a is input. Further, as will be described later, the restoration circuit 18a turns off the reception lamp 25 of the seismic sensor 12 and the reception lamp 28 of the gas leakage sensor 11 shown in FIG. 2 to stop the output to the transfer device.

A power supply unit 48 that supplies power to each circuit unit of the operating device 10 is provided, and rectifies commercial AC100V to supply, for example, DC24V. In addition, the power supply unit 48 is provided with a backup power supply 50 using a battery so that the function of the operating device 10 can be exhibited until the backup power supply 50 is consumed even during a power failure. Upon receiving the detection output of the detection signal from the gas leak receiving circuit 13 or the seismic sensing circuit 14, the control circuit 18 turns on the receiving lamp provided in the display operation unit 19 and at the same time sounds the buzzer to give an acoustic alarm. . Further, the control circuit 18 is provided with an interlocking / non-interlocking setting function, and when the interlocking mode is set, the valve drive circuit 16 is controlled in synchronization with the gas leak or the reception output of the seismic detection signal. Then, the gas emergency shutoff valve 15 is automatically closed.

At the same time, the transfer circuit 17 is also controlled to output the transfer to an external transfer device. On the other hand, in the setting state of the non-interlocking mode, the closing drive of the gas emergency shutoff valve 15 and the transfer output to the transfer device are not performed, but only the alarm display on the display operation unit 19 is performed. FIG. 2 is an explanatory view showing the appearance of the operating device of the present invention. In FIG. 2, a power supply lamp 20 is provided on the front panel of the operating device 10 from the left side, and a standby power supply test switch 21 and a standby power supply test lamp 22 are subsequently provided. In the backup power supply test, when the backup power supply test switch 21 is pressed, a function test of the backup power supply 50 provided in the power supply unit 48 of FIG. 1 is performed, and if the backup power supply test is normal, the backup power supply test lamp 22 lights up in green, for example. If the capacity is insufficient, it will switch from green to off.

Of course, when the backup power supply 50 is defective and the voltage is low from the beginning, the backup power supply test lamp 22 remains off from the beginning. Subsequently, an acoustic window 23 with a built-in buzzer and an acoustic stop switch 24 are provided inside. Next, a reception lamp 25, an interlocking indicator light 26, and a non-interlocking indicator light 27 are provided as displays regarding the seismic sensor input. Similarly, a reception lamp 28, an interlocking indicator light 29, and a non-interlocking indicator light 30 are provided to indicate the gas leak sensor input.

The interlocking mode and the non-interlocking mode setting for each input of the seismic sensor and the gas leak sensor are performed by the seismic-sensing interlocking / non-interlocking setting switch 39 provided on the rear surface of the operating device 10 as shown in FIG. Also, it can be performed by the interlocking / non-interlocking setting switch 40 for gas leak. Further, a shutoff valve select switch 41 is provided on the back side because two gas emergency shutoff valves can be controlled in the embodiment of FIG. Therefore, if the interlocking / non-interlocking setting switches 39, 40 are switched to the interlocking side, the interlocking indicator lights 26, 29 are lit, and if they are switched to the non-interlocking side, the non-interlocking indicator lights 27, 30 are lit.

Subsequently, an operation display section for two gas emergency shutoff valves is provided on the panel surface of the operation device 10. For example, looking at the display operation unit labeled "shut-off valve 1", an open indicator light 31, a closed indicator light 32 and a disconnection indicator light 33 are provided. Further, an activation switch 34 is provided, and by pressing the activation switch 34, the gas emergency shutoff valve 15 can be manually driven to be closed. Further, as shown in detail in FIG. 4, the activation switch 34 is an illumination type switch having a built-in indicator lamp (LED 34c) in the operation section. When the activation switch 34 is turned on once, the incorporated LED 34c lights up. The gas emergency shutoff valve 15 is lit until it is restored.

Similarly, the operation display section labeled “shut-off valve 2” is also provided with an open indicator light 35, a close indicator light 36, a disconnection indicator light 37, and a start switch 38. Note that the shutoff valve select switch 41 provided on the back side of FIG. 3 has, for example, “select position 1” and “2”, and at the select position 1 only the drive of the shutoff valve 1 side is enabled, and “select position 2”. If this is set, the activation control of the "shutoff valves 1" and "2" can be enabled.

FIG. 4 is a circuit block diagram showing an embodiment of the present invention, which is realized as an internal circuit of the display operation unit 19 shown in FIG. The start-up switches 34 and 38 are illumination type switches as described above, and switches 34a and 38a for transmitting the manual operation detection signals of the "shutoff valve 1" and "2" to the control circuit 18, respectively. It has interlocking switches 34b and 38b interlocking with the switches 34a and 38a, and LEDs (light emitting diodes) 34c and 38c.

A voltage is applied to one end of each of the switches 34a and 38a for transmitting the manual operation detection signals of the "shutoff valves 1" and "2", and when the switches 34a and 38a are turned on, the control circuit 18 is activated respectively. When the operation of the switches 34 and 38 is detected, the valves 15 of "shutoff valve 1" and "shutoff valve 2" are closed. Further, one end of each of the interlocking switches 34b and 38b is applied with a voltage and connected to the latch circuits 42 and 44, respectively, and the other ends thereof are grounded. A lighting voltage is applied to one end of each of the LEDs 34c and 38c, and the other end is grounded via the switches 43 and 45. The switches 43 and 45 are turned on and off under the control of the latch circuits 42 and 44, respectively.

That is, when the activation switches 34 and 38 are operated, the interlocking switches 34b and 38b are turned on, so that the manual operation detection signal is latched by the latch circuits 42 and 44, and the latch circuits 42 and 44. Turns on the switches 43 and 45. Therefore, the LEDs 34c and 38c are continuously lit. Then, in FIG. 1, when the contact 15b for detecting the valve opening / closing on the shutoff valve 15 side is closed, a restoration signal is sent to the control circuit 18, and the restoration circuit 18a of the control circuit 18 receives this restoration signal, When neither the leak sensor 11 nor the vibration sensor 12 outputs a detection signal, the latch release signal is output to the latch circuits 42 and 44 shown in FIG. 4, and the receiving lamp of the vibration sensor 12 shown in FIG. 25 and the reception lamp 28 of the gas leak sensor 11 are turned off, and the output to the transfer device is stopped.

Therefore, according to the above-described embodiment, when the valve 15 is opened, the recovery signal is received by closing the contact 15b for detecting valve opening / closing provided on the valve 15 side, and Since the valve recovers only when the detection signal from the seismic sensor is not received, whether the valve is closed due to the malfunction of the device, the detection signal of the seismic sensor or the gas leak sensor, or the manual operation. It is possible to know the exact situation when the gas emergency shutoff valve 15 is restored and to clarify the responsibility of the specialist.

When the activation switches 34 and 38 are operated, the LEDs 34c and 38c may be blinked instead of being continuously lit.

[0026]

[Effect of device]

 As described above, according to the present invention, when the gas emergency means valve is opened, a recovery signal is received from the valve opening / closing detection means provided on the gas emergency shutoff valve side, and the gas leak sensor senses Only when the detection signal from the seismic device is not received, the reception display of the seismic shock absorber, the gas leak sensor, the operation display of the manual operation, and the notification to the external transfer device are restored, so the valve is installed It is possible to know whether it was closed due to a malfunction of the device, or it was operated due to a detection signal of a seismic sensor or gas leak sensor or a manual operation. Therefore, when the gas emergency shutoff valve is restored, it is possible for the expert to grasp the correct situation and to clarify the responsibility.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the overall configuration of the present invention.

FIG. 2 is an explanatory view showing the appearance of the device of the present invention.

FIG. 3 is an explanatory view showing the back side of FIG.

FIG. 4 is a circuit diagram of an embodiment of the present invention.

FIG. 5 is a block diagram of a conventional device.

[Explanation of symbols]

10: Operating device 11: Gas leak sensor 12: Non-latch seismic sensor 13: Gas leak receiving circuit 14: Seismic sensing circuit 15: Gas emergency shutoff valve 15a: Solenoid 15b: Contact point 16: Valve drive circuit 17: Transfer circuit 18 : Control circuit 18a: Recovery circuit 19: Display operation part 19a: Manual operation display means 20: Power supply light 21: Standby power supply test switch 22: Standby power supply test light 23: Acoustic window 24: Sound stop switch 25, 28: Reception light 26 , 29: interlocking light 27, 30: non-interlocking light 31, 35: open indicator light 32, 36: closed indicator light 33, 37: disconnection indicator light 34, 38: start switch 34a, 38a: switch 34b, 38b: interlock switch 34c, 38c: LED 39: Interlocking / non-interlocking setting switch for seismic shock 40: Interlocking / non-interlocking setting switch for gas leak 41: Shut-off valve selection G Switch 42 and 44: the latch circuit 43 and 45: switch

Claims (3)

[Scope of utility model registration request] 1. A seismic sensor which detects an earthquake motion and outputs an earthquake detection signal, and a gas leak sensor which detects a gas leak and outputs a gas leak detection signal can be connected to each other. In a gas emergency shutoff valve operating device having a control unit for closing and driving the gas emergency shutoff valve based on a detection signal of a sensor or a manual operation, in the case where the seismic detector detects a seismic motion or a gas leak sensor, When a gas leak is detected, a display means for continuously displaying that fact, a valve opening / closing detecting means provided on the gas emergency shutoff valve side, and a case where a recovery signal from the valve opening / closing detecting means is received, and An operating device for a gas emergency shutoff valve, comprising: a recovery unit that restores the display of the display unit only when a detection signal from the gas leak sensor and the seismic sensor is not received. 2. When a manual operation for driving to close the gas emergency shutoff valve is performed, a manual operation display means for continuously displaying the fact is provided, and the restoration means is a restoration signal from the valve opening / closing detection means. 2. The emergency gas shutoff according to claim 1, wherein the display of the manual operation display means is restored only when the signal is received and the detection signals from the gas leak sensor and the seismic sensor are not received. Valve operating device. 3. A transfer means for notifying an external transfer device when the seismic detector detects an earthquake motion, when the gas leak sensor detects a gas leak, or when a manual operation is performed. The recovery means transfers the transfer means only when the recovery signal from the valve opening / closing detection means is received and when the detection signals from the gas leak sensor and the seismic sensor are not received. The gas emergency shutoff valve operating device according to claim 1 or 2, characterized in that the gas emergency shutoff valve operating device is stopped.