JPH01314578A - Gas circuit breaker - Google Patents

Abstract

PURPOSE:To enable a set period of a timer to be used effectively by sending the second start signal and starting the timer when a gas flow rate exceeding a specific value is observed after the first start signal is input to modify a proper use condition. CONSTITUTION:A start signal applying means 10 consists of the first start signal applying part 11, the second start signal applying part 12 and a start signal discriminating part 13. In the above constitution, after a signal from the first start signal applying part is input, and when the second start signal applying part checks a signal of a flow rate measuring means 1 exceeding a specific value and outputs a signal, the start signal discriminating part 13 sends a start signal to a timer 5 and starts it to time. Conditions of gas use during this period, that is, a total flow rate, a separate maximum flow rate and a continuous operating time, etc., are stored in a storage and arithmetic part 7 of conditions of use during the timing period; a specific arithmetic is done when the timing period is over. The result is compared with an initial condition in a proper use condition set modifying part 8, and a specific value is reset.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a gas shutoff system that automatically shuts off gas passages in the event of an abnormality and prevents explosions, poisoning accidents, etc. caused by city gas, propane gas, etc. Regarding equipment.

BACKGROUND OF THE INVENTION 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, 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 change the usage state to the stored usage state. a usage condition memory calculation unit 7 that calculates usage conditions based on the usage condition; and a proper usage condition setting change unit 8 that compares the output of the usage status storage calculation unit with the initial conditions and changes the setting to a predetermined value as a new appropriate usage condition. , and a shutoff means 9 for shutting off the gas passage in response to a shutoff signal from the appropriate usage condition determination section.

Here, the proper usage conditions refer to items such as the total flow rate, individual maximum flow rate, and safe continuous usage time set according to the capacity of each gas meter. 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. What is individual maximum flow rate?
It detects changes in gas flow rate every predetermined measurement period, identifies how many types of gas appliances are currently in use and how much gas each one consumes, and determines whether the maximum gas consumption exceeds the set value. When the gas valve is opened, it outputs a closing signal to the shut-off device, which helps prevent gas leaks such as cracks in the gas hose or combustion that goes out when the gas valve is half-open. In addition, safe continuous use time is the time that gas appliances in a certain combustion range can be used continuously, which is set for each range based on statistical data of the time when gas appliances are used continuously.
When the data from the usage state detector exceeds the set time, an activation signal is sent to the shutoff device to ensure safety even when the user forgets to turn off the gas appliance.

With the above configuration, when the activation signal is applied to the timer, counting of a predetermined period of time is started, and at the same time, the gas usage pattern during the period is measured by the operation of the usage state storage calculation section. In other words, during this time, the actual measured values such as the total flow rate, individual maximum flow rate, continuous usage time, etc. mentioned above are updated, and at the same time as the timer ends, the final data is multiplied by a predetermined value in the usage status storage calculation section to ensure proper gas usage. It is sent to the condition setting change section. 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 appropriate usage condition determining section compares the new set conditions mentioned above with the signal from the usage state detection section, and if the conditions are deviated from, it is determined that there is an abnormality and the shutoff means is activated (for example, in the patent application). Publication number 61-248688).

Problems to be Solved by the Invention However, in the above configuration, the timer is not activated from the time when the start signal applying means is activated, that is, when the push button switch is pressed or when the external signal transmission means is activated. Since time measurement is started, there is a problem in that when gas is not actually used, for example, time is wasted in case of long-term absence.

The present invention solves this conventional problem, and when a gas flow rate equal to or higher than a predetermined value is observed after the first start signal is input, a second start signal is generated to start the timer. The purpose is to provide a shutoff 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 based on a flow rate signal sent from the system; an initial condition storage section that stores the appropriate gas usage conditions as an initial value in advance; a proper usage condition determination unit that determines that an abnormality occurs when the deviation occurs and outputs a cutoff signal; a timer that counts a predetermined period; a start signal application unit that starts the timer; and a signal from the usage state detection unit that activates the timer. a usage state storage/calculation section that stores the gas usage state in the interior and calculates usage conditions based on the stored usage state; and a usage state storage/calculation section that compares the output of the usage state storage/calculation section with the initial conditions and sets a new predetermined value. It consists of an appropriate usage condition setting change section that changes settings as appropriate usage conditions, and a shutoff means that shuts off the gas passage in response to a shutoff signal from the appropriate usage condition determination section, and the activation signal application means responds to the first activation signal. an application unit, a second activation signal application unit that emits a signal when a predetermined gas flow rate or more flows, and a signal from the second activation signal application unit after the signal from the first activation signal application unit is input. It consists of a start signal determination section that sends a start signal to the timer when the signal is input.

Effect The present invention has the above-described configuration, so that after the signal from the first activation signal application section is input, the activation signal determination section determines whether the signal from the first activation signal application section is input or not.
When the start signal application section detects a gas flow rate equal to or higher than a predetermined value and outputs a signal, it sends a start signal to the timer to start timing. The actual gas consumption pattern is detected during the period in which this timer is activated, and based on the data, appropriate usage conditions for households where the meter is installed are set.

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. 5 are components having the same functions. The activation signal applying means 10 is a first
It is comprised of a starting signal applying section 11, a second starting signal applying section 12, and a starting signal determining section 13.

In the above configuration, the start signal determining section allows the second start signal applying section to check whether the signal from the flow rate measuring means 1 has exceeded a predetermined value after the signal from the first start signal applying section is input. When the signal is output, a start signal is sent to the timer 5 to start time measurement. The gas usage state during the measurement time is stored in the usage state storage calculation unit 7, and a predetermined calculation is performed when the count is over. The result is compared with the initial conditions in the proper usage condition setting change section 8, and a predetermined value is reset.

The above-mentioned contents can be easily realized by using calculation and judgment functions based on program operation of a microcomputer or the like. A schematic program flow is shown below in FIGS. 2 and 3.

In FIG. 2, when the program starts, an initial value is set as the appropriate gas usage condition at 18, a flow rate is then measured at 19, and the gas usage state as described above is detected at 20. Next, at 21, it is determined whether or not a timer for measuring a predetermined period is counting, and if it is counting, the gas usage status is stored at 22. That is, the maximum value of the usage state of gas corresponding to each usage condition is stored and updated. If the count is not in progress, it is determined in step 23 whether the gas flow rate is greater than or equal to a predetermined value.
4, a second activation signal is output.

In addition, if the value is not greater than the predetermined value at 23, and after passing through 22°24, each of the appropriate gas usage conditions is determined at 25. In 26, if the result of determination in 25 is abnormal, 27
It branches to and outputs a cutoff signal. If there is no abnormality, branch to ■.

In FIG. 3, the branch contents of ■ will be explained. At 28, it is determined whether or not the proper usage conditions have already been changed. If not, it is determined at 29 whether or not the timer count has ended, and when it has ended, the usage state storage calculation unit outputs at 30. Compare this with the initial condition, select the smaller one, and select 3.
Step 1 changes the settings for proper usage conditions. If the timer count has not ended at 29, the process branches to 32, and it is determined whether the timer is currently counting.

If counting is in progress, counting is continued at step 33, and if not counting, it is determined at step 34 whether or not the first activation signal has already been input. When the first activation signal is input, the presence or absence of the second activation signal is determined at 35. If there is also a second activation signal, 36
starts the timer count. If it has already been changed at 28, or if there is no activation signal yet at 34°35, and
After passing through 31°33.36, return to step (2) and continue the program processing from the flow rate measurement in step 19.

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

That is, since data is observed after the gas actually starts flowing, the timer's measurement period can be used effectively.

Next, another embodiment of the present invention will be explained with reference to FIG.

The same numbers as in FIG. 1 are components having the same functions. Reference numeral 15 denotes a shutoff means return signal generating section which detects the state when the shutoff means 9 is restored by opening the shutoff means 9 and sends a signal to the proper usage condition determination section 14;
7 outputs a signal to the starting signal determining section 13 at the time when the signal from the cutoff means return signal generating section 15 is input. In FIG. 4, reference numeral 16 denotes a starting signal applying means, which includes the first starting signal applying section 17, a second starting signal applying section 12 that issues a signal when a predetermined gas flow rate or more flows, and the first starting signal applying section 12, which issues a signal when a predetermined gas flow rate or more flows. The starting signal determining section 13 sends a starting signal to the timer at the time when the signal from the second starting signal applying section is input after the signal from the signal applying section is input.

With the above-described configuration, after the cutoff means is activated by the output of the proper usage condition determination section, when the cutoff means is operated to return, a signal is transmitted from the cutoff means return signal generation section to the first activation signal application section, and this signal In response, the starting signal applying section of the first cylinder 1 sends a signal to the starting signal determining section. In the early start signal determination section, after inputting the early signal, when the second start signal application section detects that a predetermined gas flow rate or more has flowed and issues a signal, it outputs a start signal to start the timer. . In other words, data observation starts after gas starts flowing after the shutoff means is reset. Therefore, for example, after the cutoff means is activated due to each gas logic cutoff reason as described above, by setting the time point when the cutoff means is reset to use the gas again as the first activation signal, the gas is stopped. If you actually use it, you can automatically start data observation.

The contents shown in FIG. 4 can be easily realized by using calculation and judgment functions based on program operations of a microcomputer or the like.

Further, by configuring the first activation signal application unit to have a communication means with an external device and to issue the first activation signal to the early activation signal determination unit in response to a predetermined communication message or signal, for example, The activation of data observation can be controlled from a remote location via a telephone line. In other words, the functions of the present invention can be implemented for multiple gas meter users by means of communication control means without having to go to each location.

Further, the first activation signal applying section may include mechanical coupling, electrical coupling,
By configuring a configuration that outputs a signal to the start signal determination unit when a signal is input from the outside through magnetic coupling or optical coupling, it is possible to eliminate the need to provide a start switch means etc. on the outside of the gas meter body itself. , can control the first activation signal of the timer. For example, by applying a magnet from outside the meter and activating an internal reed switch, a signal is output from the first activation signal application section to the activation signal determination section. Alternatively, after the reed switch is actuated, the cutoff means is actuated, and then when the return signal is input, the first
A signal is output from the activation signal applying section to the activation signal determining section. With this configuration, instead of emitting the first activation signal in the return operation after the cutoff means is activated by the gas logic cutoff, the cutoff means is activated by an external operation to start data observation, and in the subsequent return operation. The first activation signal can be output.

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

(1) 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. In such a case, the shutoff means operates and stops the gas supply, which has the effect of preventing dangerous situations such as gas explosions and gas poisoning. Further, the timer is started at the time after the first start signal is input and when the second start signal, that is, the signal issued when it is detected that the gas is flowing at a predetermined flow rate or more, is input. This allows data observation to be carried out after the gas actually begins to flow, making effective use of the observation period. During the count period of this timer, the actual usage pattern of the gas supply system where the gas meter is installed is observed, and the maximum value is compared with the initial value to reset the predetermined value as the proper usage condition. Compared to the conditions that were determined solely by the capacity (number), individual special conditions are also taken into account when making decisions, making it possible to further increase the safety level against gas accidents.

(2) When the interrupting means is operated to return, a signal is transmitted from the interrupting means return signal generating section to the first starting signal applying section, and upon receiving this signal, the first starting signal applying section sends a signal to the starting signal determining section. send. In the early start signal determination section, after inputting the early signal, when the second start signal application section detects that a predetermined gas flow rate or more has flowed and issues a signal, it outputs a start signal to start the timer. . That is, data observation starts after the gas starts flowing after the shutoff means is reset, so for example, after the shutoff means is activated due to each gas logic shutoff reason, the shutoff means is reset to use the gas again. By setting the time point when the first start signal is generated, data observation can be started automatically after the gas is actually used.

(3) By configuring the first activation signal applying section to have a means of communicating with external equipment, it is possible to control the activation of data observation from a remote location, for example, via a telephone line. In other words, the functions of the present invention can be implemented for multiple gas meter users by means of communication control means without having to go to each location.

(4) The first activation signal applying section includes mechanical coupling, electrical coupling,
Data observation is started by configuring the system to output a signal to the start signal determination section when a signal is input from the outside through magnetic coupling or optical coupling, and when a cutoff means return signal is input afterwards. Data observation can be started by operating the cutoff means by an external operation and outputting the first activation signal by a subsequent return operation.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of a gas cutoff device according to an embodiment of the present invention, FIG. 2 is a diagram showing a schematic program flow of the same device, FIG. 3 is a diagram showing a continuation of the program flow of FIG. FIG. 4 is a functional block diagram of a gas cutoff device according to another embodiment of the present invention, and FIG. 5 is a functional block diagram of a conventional gas cutoff device. 1. Container measuring means, 2..Usage condition detection unit,
3. Initial condition storage unit, 4... Appropriate usage condition determination unit, 5... Timer, 7... Usage status memory calculation unit, 8... Appropriate usage condition setting change unit, 9 ...
... Cutoff means, 10-... Starting signal application means, 11.
. . . 1st activation signal application section, 12 . . . 2nd
Starting signal applying section, 13... Starting signal determining section, 15.
・・・・・・Cutoff means return signal generation part. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 2 Figure 3 Figure 4

Claims (4)

[Claims] (1) 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 a usage state detection section that detects the gas usage state based on the flow rate signal sent from the flow rate measuring means; an initial condition storage unit that stores gas appropriate usage conditions as initial values in advance; and 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 appropriate usage conditions and outputs a cutoff signal; a timer for counting a predetermined period; a start signal applying means 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 use the gas based on the stored usage state. a usage state storage calculation unit that calculates a condition; a proper usage condition setting change unit that compares the output of the usage status storage calculation unit with the initial condition and changes a predetermined value as a new appropriate usage condition; and the appropriate usage condition. a cutoff means for cutting off the gas passage in response to a cutoff signal from the determination section, and the start signal applying means includes a first
a second activation signal application unit that issues a signal when a predetermined gas flow rate or more flows; and a second activation signal application unit that applies the second activation signal after the signal from the first activation signal application unit is input. A gas cutoff device that includes a start signal determination unit that sends a start signal to a timer when a signal from the unit is input. (2) A shutoff means return signal generating section detects the state when the shutoff means is restored by opening the shutoff means and sends a signal to the appropriate usage condition determination section, and the first activation signal application section is configured to operate the shutoff means return operation. 2. The gas cutoff device according to claim 1, wherein the signal is output to the activation signal determining section at the time when the signal from the signal generating section is input. (3) It has a communication control unit that controls signal transmission with external equipment, and the first activation signal application unit outputs a signal to the activation signal determination unit when a predetermined signal is input to the communication control unit. A gas cutoff device according to claim 1. (4) The first activation signal applying section includes mechanical coupling, electrical coupling,
The gas cutoff device according to claim 1 or 2, which outputs a signal to the activation signal determination unit at the time when a signal is input from the outside by magnetic coupling, optical coupling, or the like.