JP3986104B2 - Gas shut-off device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas shut-off device as a safety measure for gas use, and more particularly to a gas shut-off device provided with means for controlling a gas supply shut-off process when a battery as a power source of the gas shut-off device is consumed.
[0002]
[Prior art]
A battery is used as a power source for operating a shut-off valve in the gas shut-off device. If the remaining capacity of the battery is reduced, the gas shut-off operation at the time of abnormality cannot be performed. Therefore, as shown in FIG. 4, the conventional gas shut-off device is provided with gas supply shut-off means for closing the shut-off valve and stopping the plug-opening function when a drop in battery voltage is detected.
[0003]
In FIG. 4, the battery voltage detection unit 21 detects the battery consumption level by detecting the voltage of the battery power source 20, and when the battery voltage in a state of being discharged to a predetermined consumption level is detected, The battery voltage detection unit 21 outputs a voltage drop signal to the gas cutoff control unit 22. When the voltage drop signal is input, the gas cutoff control unit 22 closes the cutoff valve 24. The voltage drop signal is simultaneously input to the opening function stop unit 23 to stop the operation of the opening function of the closed shutoff valve.
[0004]
[Problems to be solved by the invention]
In the above conventional configuration, when the battery voltage falls below a predetermined value, the shutoff valve closes immediately and the opening function stops, so the user is forced to stop the gas suddenly and replace the gas shutoff device. You will be inconvenienced that you cannot use gas until you do.
[0005]
The present invention was devised to solve the problems of the conventional configuration, and an object of the present invention is to provide a gas shut-off device capable of using a gas for a predetermined time even when the battery voltage is lowered.
[0006]
[Means for Solving the Problems]
The present invention relates to a gas shut-off device comprising a shut-off valve that shuts off a gas passage in the event of an abnormality and a battery power source that supplies operating power of the device including the shut-off valve, and monitors the voltage of the battery power source. Is a voltage that outputs a voltage drop signal when it is detected that the battery consumption voltage is less than or equal to the battery consumption voltage set in consideration of the battery consumption before a predetermined time before the operation guarantee voltage, which is the lower limit value at which the device can be operated. A drop detecting unit, a plug receiving unit that receives a plug opening request for releasing the gas passage closure by the shutoff valve from the input of the voltage drop signal, and outputs a plug opening request signal; and the operation guarantee from the input of the voltage drop signal A timer unit that counts a predetermined time until reaching the voltage, and an opening function stop unit that stops the opening request from the opening receiving unit and outputs an opening stop signal when the timer unit counts up A gas shut-off control unit for closing the gas passage when the voltage drop signal and the opening stop signal are input and opening the gas passage when the opening request signal is input. And
[0007]
According to the above configuration, when a preset battery consumption voltage is detected by the voltage drop detection unit, the gas shut-off control unit closes the shut-off valve and shuts off the gas supply. If requested, the shut-off valve can be opened within a time until the voltage of the battery power source reaches a preset operation guarantee voltage. The time from when the battery consumption voltage is detected until the operation guarantee voltage is reached is counted by the timer unit, and when this counts up, the operation for closing the shut-off valve is executed again by the gas shut-off control unit, and the plug opening function Stopping of the opening function is executed by the control unit. Accordingly, the gas can be used for a predetermined time after the battery consumption voltage is detected.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention.
[0009]
FIG. 1 is a block diagram showing a configuration of a gas cutoff device according to the present embodiment.
[0010]
In FIG. 1, the gas shut-off device 1 detects a battery voltage in a depleted state where the capacity of the battery power source 10 capable of operating the gas shut-off device 1 within a predetermined operation guarantee time is detected, and generates a voltage drop signal A. When the voltage drop detection unit 2 to output and the voltage drop signal A are input, the opening of the shutoff valve 9 is accepted and an opening request (by an opening request switch or input of an opening signal by communication) is made. An opening receiving unit 3 that outputs an opening request signal C when there is a timer, and a timer unit 4 that counts a predetermined operation guarantee time from when the voltage drop signal A is input and outputs an opening completion signal D An opening function stop unit 5 that outputs an opening stop signal E for stopping the opening of the opening request signal C when the opening completion signal D is input, and the voltage drop signal A or the opening stop signal. Shut-off valve when signal E is input Was plugging operation, is constituted by a gas cut-off control unit 6 for unplugging the shut-off valve 9 when said cap removal request signal C to the input previous said plugging stop signal E is input.
[0011]
The voltage drop detection unit 2 monitors the degree of battery consumption by measuring the voltage of the battery power supply 10 at predetermined time intervals, for example, 24 hour intervals. Since the voltage of the battery power supply 10 exhibits discharge characteristics as shown in FIG. 2 at the end of battery consumption, a lower limit voltage that can operate the gas shut-off device is set in advance as an “operation guarantee voltage”, and from here The voltage value at the position that is reversed by the number of days is set as the “battery consumption voltage”. The voltage drop detection unit 2 monitors the battery voltage and detects the battery consumption voltage. The required number of days is, for example, three days, and the shutoff valve 9 can be opened for three days from when the battery consumption voltage is detected until the voltage of the battery power supply 10 reaches the operation guarantee voltage. A grace period is provided until the gas cutoff device 1 is replaced. For example, if the battery consumption voltage is detected on Friday, the battery consumption warning is notified on this day, but the shutoff valve 9 can be opened until Saturday and Sunday, and the operation of the gas cutoff device 1 is also performed. Since it is guaranteed, the gas can be used until the replacement of the gas shutoff device 1 on Monday. The setting of the battery consumption voltage that reverses from the operation guarantee voltage is determined by adding an error to the average power consumption of the gas shut-off device, and this interval is taken as the operation guarantee time.
[0012]
The operation of the gas shut-off device 1 having the above configuration and the processing procedure will be described with reference to the flowcharts shown in FIGS. Note that the numbers shown in S1, S2,... Shown in FIG. 3 are step numbers indicating the processing procedure and coincide with the numbers appended to the text.
[0013]
When the voltage drop detection unit 2 that is checking the degree of consumption of the battery power supply 10 detects the battery consumption voltage, the voltage drop signal A is output to the gas cutoff control unit 6, the opening acceptance unit 3, and the timer unit 4. (S1). The gas shut-off control unit 6 to which the voltage drop signal A is input outputs the first shut-off command signal B ₁ to operate the shut-off valve 9 and close the gas passage (S2).
[0014]
When the voltage drop signal A is input, the timer unit 4 starts counting (S3), and until the timer unit 4 finishes counting for a predetermined time, there is a plug opening request in the plug opening receiving unit 3, When the opening request signal C is output, the gas cutoff control unit 6 opens the cutoff valve 9 (S5). When the counting by the timer unit 4 is finished (S6), since the opening end signal D is output, the opening function stop unit 5 outputs the closing stop signal E and stops accepting the opening request (S7). ). Plugging the stop signal the gas cutoff controller 6 E is input to plugging the shut-off valve 9 by outputting a second cutoff command signal B ₂ (S8).
[0015]
In the above configuration, the battery consumption voltage can be detected not at a 24-hour cycle, but at a short time interval or always. The opening request can also be received by inputting an opening request signal through communication with a central monitoring center that monitors the operation of the gas shutoff device. It is also possible to accept the opening request in conjunction with the first return operation of the shutoff valve after the voltage drop signal A is input.
[0016]
【The invention's effect】
As described above, according to the present invention, when a preset battery consumption voltage is detected by the voltage drop detection unit, the gas cutoff control unit closes the cutoff valve and shuts off the gas supply. If there is an opening request in the reception unit, the shutoff valve can be opened within the time until the voltage of the battery power source reaches a preset operation guarantee voltage. Therefore, the gas can be used for a predetermined time after the battery consumption voltage is detected, and the convenience of the user can be improved. In addition, the time from when the battery consumption voltage is detected until the operation guarantee voltage is reached is counted by the timer unit. When this time is counted up, the gas shutoff control unit again performs the operation of closing the shutoff valve. Since the stopper function is stopped by the stopper function stop unit, the safety of gas use is ensured.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a gas cutoff device according to an embodiment of the present invention.
FIG. 2 is a graph illustrating discharge characteristics, operation guarantee voltage, and battery consumption voltage setting when the battery power supply of the gas cutoff device is consumed.
FIG. 3 is a flowchart for explaining the operation of the gas cutoff device.
FIG. 4 is a block diagram showing a configuration of a gas cutoff device according to a conventional configuration.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gas cutoff device 2 Voltage drop detection part 3 Opening reception part 4 Timer part 5 Opening function stop part 6 Gas cutoff control part 9 Shut-off valve 10 Battery power supply

Claims (1)

In a gas shut-off device comprising a shut-off valve that shuts off the gas passage in the event of an abnormality, and a battery power source that supplies the operating power of the device including the shut-off valve,
The voltage of the battery power supply is monitored, and this voltage is equal to or lower than a battery consumption voltage set in consideration of battery consumption a predetermined time before going back from the operation guarantee voltage that is the lower limit value at which the apparatus can be operated. A voltage drop detection unit that detects the fact and outputs a voltage drop signal; and a plug open acceptance unit that accepts an opening request for releasing the gas passage closure by the shutoff valve from the input of the voltage drop signal and outputs an opening request signal And a timer unit that counts a predetermined time from the input of the voltage drop signal to the operation guarantee voltage, and stop opening by stopping the opening request from the opening receiving unit when the timer unit counts up An opening function stop unit for outputting a signal, and a gas for closing the gas passage when the voltage drop signal and the opening stop signal are input, and for opening the gas passage when the opening request signal is input Gas cutoff apparatus characterized by comprising; and a disconnection control section.

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