JPH02144609A - Gas interrupting device - Google Patents

Abstract

PURPOSE:To form more safe gas interrupting means by transmitting a signal to a start signal impressing means at the count-over of a 2nd timer and allowing a 1st timer to restart its counting. CONSTITUTION:A practical gas consumption pattern is detected in the operation period of a 1st timer 10 and the proper using condition of a home equipped with a meter is set up based upon the data. At the passage of a 2nd prescribed period after the end of a 1st prescribed period, the 1st timer 10 starts counting again to execute data monitoring and reset the proper using condition. Since a 2nd timer 12 is repeatedly counted, the monitoring of data and the resetting of the proper using condition are periodically executed. Thus, safeness can be improved.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention automatically shuts off gas passages in the event of an abnormality to prevent explosions, poisoning accidents, etc. caused by city gas, propane gas, etc. Relating to a gas cutoff device.

BACKGROUND ART A conventional gas cutoff device of this type, as shown in FIG.
A flow rate measuring means 1 that emits a signal according to the amount of gas passing through a gas meter provided in a gas supply line, a usage state detection section 2 that detects the usage state of gas based on a flow rate signal sent from the flow rate measuring means, an initial condition storage unit 3 that stores proper usage conditions as initial values in advance, and a proper usage condition determination unit 4 that determines that there is an abnormality when the signal from the usage state detection unit deviates from the gas proper usage conditions and outputs a cutoff signal. , a timer 5 for counting a predetermined period of time, a starting signal applying means 6 for starting the timer, and a signal from the usage state detection section to store the gas usage state during the operation of the timer, and to store the gas usage state during the operation of the timer. A usage state storage calculation unit 7 that calculates usage conditions based on the usage status 4 and 2, and the output of the usage status storage calculation unit and the initial conditions are compared, and a predetermined value is updated, and the settings are changed as appropriate usage conditions. and a cutoff means 9 for cutting off the gas passage in response to a cutoff signal from the proper use condition determining section. Here, the proper use conditions refer to the capacity of each gas meter. Shows items such as total flow rate, individual maximum flow rate, safe continuous use time, etc. The total flow rate is the total flow rate of gas that passes through the gas meter within a specified measurement period.If the current total flow rate exceeds the initially set predetermined value, such as when a gas hose is disconnected or a gas appliance goes out, it is considered an abnormality. It is a usage condition that is determined and activates the shutoff device. The individual maximum flow rate is calculated by detecting changes in the gas flow rate at each predetermined measurement period, identifying how many types of gas appliances are currently in use and how much gas each one consumes, and calculating the maximum gas consumption among them. When the lid exceeds a set value, it outputs a closing signal to the shutoff device.
Deal with gas leaks such as cracks in gas hoses or combustion that goes out when the gas valve is partially opened. In addition, the safe continuous use time is the continuous use time set for each range based on the statistical data of the time when a gas appliance in a certain combustion range is continuously used. When the time limit is exceeded, an activation signal is sent to the shut-off device, ensuring safety even when the user forgets to turn off gas appliances.

With the above configuration, when a start signal is applied to the timer, counting of a predetermined time is started, and at the same time, the gas usage pattern during the said time is measured by the operation of the usage state storage calculation section. That is, during this time, the actual measured values such as the total flow rate, individual maximum flow rate, continuous usage time, etc. mentioned in 7 above are updated, and at the same time as the timer ends, the final data is multiplied by a predetermined value in the usage state storage calculation section and the gas It is sent to the appropriate usage condition setting change department. This proper gas use condition setting change section compares the initial conditions with the data in the storage calculation section and newly sets predetermined proper gas use conditions.

Thereafter, the iδ normal usage condition determination unit compares the new setting conditions described above with the signal from the usage status detection unit, and if the conditions are deviated from, it is determined to be abnormal. In this configuration, the gas consumption pattern of each gas meter installed user during the period when the evening/timer was in operation is understood and appropriate usage conditions are set for each individual, but if the gas appliance is replaced after the timeout, A problem has been that the above conditions are not necessarily appropriate when the device is no longer used.

The present invention solves this conventional problem, and the timer periodically monitors the gas usage status even after the timer has finished operating, captures changes in gas consumption in homes where the meter is installed, and automatically adjusts to the optimal usage conditions. By modification, the aim is to provide a layer-safe gas cut-off device.

Means for Solving the Problems In order to solve the above problems, the gas cutoff device of the present invention includes a flow rate measuring means that emits a signal according to the amount of gas passing through a gas meter provided in a gas supply line, and the flow rate measuring means. a usage state detection section that detects the usage state of the gas using a meteor signal sent from the meteor signal; an initial condition storage section that stores the proper gas usage conditions as an initial value in advance; a proper usage condition determination unit that outputs a cutoff signal in 1 to 1 when the deviation is determined to be abnormal; a first timer that counts a first predetermined period; a starting signal applying means that starts the first timer; a usage state storage/calculation unit that stores the gas usage status during operation of the first timer based on a signal from the status detection unit and calculates usage conditions based on the stored usage status; an appropriate usage condition setting change section that compares the output with the initial conditions and changes the setting to a predetermined value as a new and second appropriate usage condition; and a shutoff that shuts off the gas passage in response to a shutoff signal from the appropriate usage condition determination section. and a second timer that repeatedly counts a second predetermined period of time.The present invention has the above-described structure, and is configured to measure the actual gas consumption pattern during the period in which the first timer operates. Detection 1 - At the same time as the proper usage conditions of the household where the meter is installed are set based on the data, when the second predetermined period elapses after the end of the first predetermined period of time measurement, the first predetermined period is again set. The timer starts counting, performs data monitoring, and resets proper usage conditions. Since the second timer is counted repeatedly, data monitoring and appropriate use conditions are periodically reset.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, the same numbers as in FIG. 6 are components having the same functions. However, the first timer of 10,
The start signal application stage f and 11 have the same functions as the timer 5 and the same means 6, respectively. Furthermore, the present gas cutoff device includes a second timer 12 that counts a second predetermined period. In the above configuration, when the second glue/timer 12 outputs a count end signal Y, the start signal applying means 11 starts the first timer lO and causes the gas usage state to be stored and calculated again.
This causes the proper usage condition setting change section 8 to reset the proper usage conditions.

This situation will be explained with reference to FIG.

In FIG. 2, the horizontal axis shows elapsed time, and the vertical axis shows proper usage conditions, that is, the cutoff level for each cutoff condition. The X mark represents observed data, ie, gas usage status. Also, ~ the dashed line is the initial condition M! (for example, the maximum limit value). The time 1゛1 from time L1 to t2 on the horizontal axis indicates the time measurement period of the first timer, and the maximum data p1 of the gas usage state observed within the period is given a safety factor k (for example, k= , 5) is multiplied to find the proper usage condition M2. That is, the appropriate usage condition for the period T1 is Ml, which is the same as the initial condition, and at time t2, Ml is compared with the calculation result M2, and the smaller M2 is newly set as the appropriate usage condition. From then on, this proper usage condition M2 is applied until time t, 3 when the second timer exceeds the count, and when the gas usage state exceeds M2, the proper usage condition determining section determines that there is an abnormality and operates the shutoff means. The period from time 0 11 to time L3 during which the cutoff signal is outputted is the second predetermined period T2.

From time t,3, the first timer resumes run 1-;
The gas usage state is observed in the same way as the period from tl to L2 described above, and a new proper usage state M is determined by multiplying the maximum value p2 between time L3 and time L4 between T 1 = 11 by the safety factor k.
I'm looking for 4. During the T1 period from time t, 3 to L4, the condition M3 is applied as is as a proper usage condition.

From time (・l onwards, M4 is applied until the second evening/1' mark ends as described above, and the first
The above-mentioned contents can be easily realized by using calculation and judgment functions based on program operation of a microcomputer or the like.

Below, a schematic program flow is shown in Figures 3, 4 and 5.

In Fig. 3, when the program starts, at 13 the initial value is set as the proper gas usage conditions and the second timer starts to start, then at 14 the flow rate is measured, and at 1
5, the gas usage status as described above is detected. Then, in step 16, it is determined whether or not the first timer that measures the first predetermined period is counting, and if it is counting, the gas usage state is stored in step 17. In other words, the maximum value of the usage state of gas corresponding to each of the above-mentioned usage conditions is stored and updated. After passing through step 17, and if counting is not in progress at step 16, each determination of appropriate gas usage conditions is performed at step 18. At step 19, if the result of the determination at step 18 is abnormal, the process branches to step 20 and a cutoff signal is output. If there is no abnormality, continue counting the second timer at step 2], then check at step 22 whether or not the appropriate usage condition setting change section has been activated based on the output of the usage state memory calculation section, and if it has been activated, go to ■. , and if it has not been activated, branch to ■.

In FIG. 4, the branch contents of ■ will be explained. At step 23, it is determined whether or not the first timer count has ended, and when it has ended, the timer's count is stopped at step 24. At step 25, the output of the usage state memory calculation unit is compared with the initial condition, and the smaller one is selected. Change the settings for proper usage conditions, and then branch to ■. If the timer count is not completed at 23, the process branches to 26, and it is determined whether the first evening/timer is currently counting.

If counting is in progress, counting is continued at step 27, and if not counting, the presence or absence of the activation signal is determined on day 2. When the activation signal is input, the first
The timer starts counting.

If there is no activation signal yet, and after passing through 27.29, return to step (3) and continue program processing from the flow rate measurement in step 14.

In FIG. 5, the content of branching in ■ will be explained. At 30, it is determined whether the second timer has finished counting, and when it is finished, it is 3.
At step 1, the count of the second timer is reset, and at step 32, the content of determination at step 22 is changed so that the appropriate usage condition setting change section is not operating based on the output of the usage state storage calculation section, and at the same time, the first timer is reset. A start signal is set to be activated, and then the second timer is activated at 33 to start timing.

If the timer count is not completed at 30, and after passing through 33, return to step 3 and continue the program processing from flow rate measurement at 14.

By executing this program flow, the functions of the gas cutoff device of the present invention can be realized.

By the way, in the above explanation, the immediately preceding proper usage conditions are slid as they are as the proper usage conditions that are applied during the period when the first timer operates after the second timer counts over, but from the very beginning That is, data observation may be performed by applying the initial value as the appropriate usage condition.

In addition, after the gas usage state deviates from the proper usage conditions and results in a shutdown, data observation may be performed again from the initial stage by the shutoff means return operation, and the shutdown conditions may be reset.
If the count of the second timer is continued without resetting, and the cutoff conditions are reset again when the regular time comes, the cutoff conditions can be periodically corrected at a predetermined time in -year.

Furthermore, the second predetermined period is the same as the first predetermined period,
That is, if data observation is performed continuously, the actual state of gas usage can be observed at all times, and even if gas appliances are changed within a short period of time, immediate measures can be taken.

Further, if a power L/under function is applied as a second timer so that the second predetermined period can be set in response to seasonal fluctuations, even more detailed responses can be made.

Effects of the Invention As described above, the gas cutoff device of the present invention provides the following effects.

By constantly monitoring the gas usage status and comparing it with the set proper usage conditions, it is possible to detect gas leaks and combustion extinction, and if the conditions are deviated from, that is, it is determined to be abnormal. Since the shutoff means operates to stop the gas supply, it is effective in preventing dangerous situations such as gas explosions and gas poisoning. In addition, the actual usage pattern of the gas supply system in which the gas meter is installed is observed for a predetermined time of the first timer based on the activation signal, and the predetermined value is determined by comparing, for example, the maximum value observed during that period with the initial value. Since the conditions for proper use are reset, individual special conditions are also taken into account when making judgments, compared to the conditions that were determined simply by the capacity (number) of gas appliances and gas meters. The degree of safety can be further increased.

Furthermore, when the count time of the second timer ends after the first timer times out, the actual usage pattern of the gas supply system is observed again and the proper usage conditions are reset. In other words, even if gas consumption decreases, the combustion stage is replaced with a smaller appliance, or consumption increases, it can be automatically dealt with by regular data observation.2 In actual use. This has the effect that the gas cutoff level can be set on the safer side without any problems.

[Brief explanation of the drawing]

Fig. 1 is a functional block diagram of a gas cutoff device in an embodiment of the present invention, Fig. 2 is a diagram showing changes in the function of the device over time, and Fig. 3 is a diagram showing a schematic program flow in an embodiment of the present invention. , FIG. 4 is a diagram showing a continuation of the program flow of FIG. 3, FIG. 5 is a diagram showing a continuation of the program flow of FIG. 3, and FIG. 6 is a functional block diagram of a conventional gas cutoff device. 1...Flow rate measuring means, 2...Usage state detection section, 3...Initial condition storage section, 4...
- Appropriate usage condition determination unit, 7... Usage condition storage calculation unit, 8... Appropriate usage condition setting change unit, 9...
. . . Blocking means, 10 . . . First timer,
11... Starting signal applying means, 12...
Second timer. Name of agent: Patent attorney Shigetaka Awano y An cough] 2 Fig. Fig. Liang Fig.♀

Claims (1)

[Claims] A flow rate measuring means that emits a signal according to the amount of gas passing through a gas meter provided in a gas supply line, a usage state detection section that detects the usage state of the gas based on the flow rate signal sent from the flow rate measuring means, and a usage state detection section that detects the usage state of the gas, an initial condition storage unit that stores conditions as initial values in advance; an appropriate usage condition determination unit that determines that there is an abnormality when the signal from the usage state detection unit deviates from the gas proper usage conditions and outputs a cutoff signal; a first timer for counting a predetermined period of time; a starting signal applying means for starting the first timer; and a signal from the usage state detector to store the gas usage state during the operation of the first timer; a usage state storage calculation section that calculates usage conditions based on the stored usage conditions; and a proper usage condition that compares the output of the usage state storage calculation section with the initial conditions and changes the setting to a predetermined value as a new proper usage condition. a setting change section, a cutoff means for cutting off the gas passage in response to a cutoff signal from the appropriate usage condition determination section, and a second timer for repeatedly counting a second predetermined period; A gas cutoff device in which a signal is transmitted to the start signal applying means upon count over, and the first timer restarts counting.