JPH0682004B2 - Gas shutoff device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shutoff device that automatically shuts off a gas passage when an abnormality occurs to prevent an accident such as an explosion accident due to city gas or propane gas.

2. Description of the Related Art As shown in FIG. 2, a conventional gas shutoff device of the related art includes a gas meter 2 in a gas supply line 1 and a flow rate measuring means 3 for issuing a signal according to the amount of gas passing through the gas meter 2.
And a cutoff means 4 for stopping the supply of gas is provided, and the usage state is judged by the flow rate signal of the flow rate measurement means 3, and if the gas condition deviates from the preset and properly stored gas proper use condition, it is judged to be abnormal and the cutoff is performed. The means 4 was equipped with a control unit 5 for issuing a closing signal. Further, the control unit 5 uses the external setting device 6
It was transmitting signals to and from.

FIG. 3 shows an example of the configuration of this conventional control unit. Those having the same reference numerals as those in FIG. 2 are components having the same function. The control unit 5 receives the flow rate signal from the flow rate measuring unit 3 and detects the usage state of the gas, and the initial condition setting that sets appropriate usage conditions in advance according to the number of the gas meter. Data transmission control between the external setting device 6 and the proper use condition judging unit 9 which judges that the signal from the use condition detecting unit 8 deviates from the gas proper use condition and outputs an interruption signal. And an external signal control unit 10 for performing.

The gas shutoff device configured as described above observes the flow rate of the gas passing through the gas meter 2 in the usage state detection 7 and carries out the comparison determination with the initial value in the proper use condition determination unit 9 to supply the gas. The system abnormality was detected and the gas supply was shut off. Further, the external signal control unit 10 transmits signals to and from the setting device 6 from the outside, and the initial condition setting unit 8 selects and sets the use condition according to the number of meters requested by the external setting device 6. .

Problems to be Solved by the Invention However, in the above-described configuration, the proper use condition is uniformly determined only by the initial value depending on the capacity of the gas meter 2 installed in the gas pipe, and therefore, in a home where the meter is installed, etc. There was a problem in that changes in gas appliances and gas consumption by special conditions and seasons could not be factored in.

The present invention solves such a conventional problem by measuring the gas consumption pattern actually used in each home or the like for a predetermined period according to the season, and changing the determination condition according to the actual situation according to the season. It is an object of the present invention to provide a safer gas shutoff device.

Means for Solving the Problems In order to solve the above problems, a gas shutoff device of the present invention is a flow rate measuring means for generating a signal according to the amount of gas passing through a gas passage, and a flow rate signal sent from the flow rate measuring means. In the usage state detection unit that detects the usage state of the gas, the initial condition setting unit that sets the gas proper use condition as an initial value in advance, if the signal of the use state detection unit deviates from the gas proper use condition, it is determined to be abnormal. Appropriate usage condition determination unit that outputs a cutoff signal, a timer that counts a predetermined period, start applying means that starts the timer, and a plurality of seasonal gas usage states during the timer operation that are stored by a flow rate signal sent from the flow rate measuring means. A seasonal use state storage unit, a gas proper use condition changing unit that changes the gas proper use condition according to the contents of the storage unit, the proper condition determining unit, and a changing unit, With a configuration including a control unit including an external signal control unit that controls data transmission between the timer activation applying unit and the external setting unit, and a shutoff unit that shuts off the gas passage according to a shutoff signal from the control unit. is there.

Operation According to the present invention, when the activation signal is applied to the timer, the present invention starts counting for a predetermined period, and at the same time, the gas usage pattern during the timer operation is measured by the operation of the usage state storage unit. The measured gas use pattern is stored in the seasonal use state storage section selected by the external setting device. Next, the proper gas usage condition changing unit compares the initial value with the initial value and newly sets a predetermined proper gas usage condition. Thereafter, the proper use condition determination unit compares the new set condition with the signal from the use state detection unit, and when the condition is not satisfied, determines that the condition is abnormal and operates the shut-off means to close the gas passage. Then, when the number of gas appliances to be used increases or decreases due to a change in season or the like, the gas use pattern is stored again in the unused place of the seasonal use state storage unit by the external setter according to the procedure described above. In this way, a plurality of gas use patterns are stored, and the gas proper use condition changing unit is operated by the external setting device to change the setting conditions as necessary.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, the same reference numerals as those in FIGS. 2 and 3 are components having the same function. The control unit 16 inputs a flow rate signal from the flow rate measuring unit 3 similar to the conventional one and detects a usage state of gas, and an initial condition setting unit 8 that presets gas proper usage conditions as initial values. An appropriate use condition determination unit 9 that outputs an interruption signal when the signal from the use state detection unit 7 deviates from the gas proper use condition, outputs a cutoff signal, a timer 11 that counts a predetermined period, and the timer 11. A start signal applying means 12 for starting, and a seasonal use state storage section 13 for storing a plurality of gas use states during operation of a timer 11 by a flow rate signal sent from the flow rate measuring means 3.
And an appropriate gas usage condition changing unit 14 that changes the gas usage conditions according to the contents of the storage unit 13, and an external signal control unit 15 that controls data transmission between the external setting device 6. There is.

The operation of the gas shutoff device configured as described above will be described. First, when the activation signal applying means 12 is activated by the external setting device 6 via the external signal controller 15, the activation signal is sent to the timer 11. The timer 11 receives the start signal and starts counting for a predetermined period. Simultaneously with the operation of the timer 11, the seasonal use state storage unit 13 selected by the external setting device 6 stores the maximum value of the gas use pattern, and thus updates the data. When the timer 11 has finished counting in this way, the final data is sent from the seasonal use state storage unit 13 to the gas proper use condition changing unit 14. Here, the initial condition is compared with the final data to newly set the condition on the safe side. Thereafter, based on the newly set condition, the gas flow rate signal from the usage condition detection unit 7 is compared by the proper usage condition determination unit 9, and when it is determined to be abnormal, the shutoff unit 4 is activated to close the gas passage 1.

On the other hand, when the number of gas appliances and the gas usage time increase or decrease depending on the season, the external setting device 6 transmits data to the external signal control unit 15 to store the seasonal gas consumption pattern. The external signal control unit 15 operates the activation signal applying unit 12 to store the gas consumption pattern in the seasonal use state storage unit 13 according to the transmitted transmission signal. Then, the timer 11 is started and the gas consumption pattern is stored. After that, the abnormality determination is performed based on the reset condition as described above. Here, since two gas consumption patterns are stored in the seasonal use state storage unit 15, if the season changes from the next year, the external use unit 6 does not need to observe the gas use state for a predetermined period and the appropriate conditions are set. Can be switched.

Further, by increasing the storage capacity of the seasonal use state storage unit 15, it is possible to set detailed conditions according to spring, summer, autumn, and winter.

As described above, according to the present invention, the following operational effects can be obtained.

(1) Because proper gas usage conditions can be stored for each season, compared to conditions that were uniformly determined by the capacity of the gas meter (number of issues), special conditions such as the home where the gas meter is installed and seasonal It is possible to make a judgment by taking into consideration the increase / decrease in gas appliances (gas fan heaters etc.) and the increase / decrease in gas consumption, and it is possible to further increase the safety level against a gas accident.

(2) It is not necessary to observe the gas consumption pattern again for a predetermined period because the gas proper use condition can be switched seasonally by using the external setting device.

[Brief description of drawings]

FIG. 1 is a block diagram of a gas shutoff device according to an embodiment of the present invention, FIG. 2 is a block diagram of a conventional gas shutoff device, and FIG. 3 is a block diagram of a conventional control unit. 2 ... Gas meter, 3 ... Flow rate measuring means, 4 ... Shutoff means, 7 ... Usage state detecting section, 8 ... Initial condition setting section, 9
...... Appropriate use condition determination unit, 11 ...... Timer, 12 ...... Starting signal applying means, 13 ...... Seasonal use state storage unit, 14 ...... Proper use condition changing unit, 15 ...... External signal control unit, 16 ... … Control unit.

Claims (1)

[Claims] 1. A flow rate measuring means for emitting a signal according to the amount of gas passing through a gas passage, a use state detecting section for detecting a gas use state by a flow rate signal sent from the flow rate measuring means, and a proper gas use condition in advance. An initial condition setting unit to be set as an initial value, a proper use condition determination unit that outputs a cutoff signal when the signal of the use state detection unit deviates from the gas proper use condition and outputs a cutoff signal, a timer that counts a predetermined period, the Activation signal applying means for activating a timer, seasonal usage state storage unit for storing a plurality of seasonal gas usage states during the timer operation by a flow rate signal sent from the flow rate measuring means,
Data transmission control between a gas proper use condition changing unit that changes the gas proper use condition according to the contents of the storage unit, the proper use condition determining unit, a changing unit, a timer, a start signal applying unit, and an external setting device. A gas shutoff device comprising: a control unit including an external signal control unit for performing the above;