JP2008203247A - Gas blast circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set a battery voltage determination frequency, corresponding to the usage of a battery power source section to enable the battery voltage to be surely determined according to the battery voltage decreasing speed, when the variation of the battery voltage decrease speed increases gradually. <P>SOLUTION: A battery operating time measuring section 12 times the operating time of a battery power source section 9 from the supply starting, and a battery validity date setting section 11 sets plural stages of validity dates. The battery operating time determining section 12 outputs a time signal, whenever the set validity date arrives, and then determines that the battery voltage is reduced, when detecting the continuous detection frequency (frequency less than N) times less than a predetermined continuous detection frequency (N) preset according to the output time signal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gas cutoff device that ensures safety when the power capacity of a battery power supply unit is consumed, for example, in a cutoff device that monitors the usage state of a gas appliance that uses city gas, LP gas, or the like.

  This type of conventional shut-off device, for example, is configured as shown in FIG. 2 in a gas shut-off device (see, for example, Patent Document 1). FIG. 2 shows a control block diagram of a conventional gas shut-off device.

  In the gas shut-off device 1 of FIG. 2, reference numeral 2 denotes a battery power source, which supplies power to the entire gas shut-off device. Reference numeral 3 denotes a shut-off valve, which stops or supplies gas in the flow path.

  Reference numeral 4 denotes a voltage drop detection unit, which detects a battery voltage taking into account a predetermined time that goes back from the operation guarantee voltage in which the capacity of the battery power source 2 capable of operating the gas cutoff device 1 remains, and outputs a voltage drop signal A. . 5 is an opening acceptance unit that accepts opening of the shut-off valve from the time when the voltage drop signal A is input, and opens when there is an opening request (opening request switch or input of an opening signal by communication). A stopper request signal C is output. A timer unit 6 counts a predetermined operation guarantee time from when the voltage drop signal A is input, and outputs a plug opening completion signal D. Reference numeral 7 denotes an opening function stop unit which outputs a closing stop signal E for stopping the opening according to the opening request signal C when the opening end signal D is input. Reference numeral 8 denotes a gas shut-off control unit, which shuts off the shut-off valve 3 when the battery voltage drop signal A or the closure stop signal E is inputted, and when the opening request signal C is inputted before the input signal of the closure stop signal E. The shut-off valve 3 is opened.

  Next, the operation of the configuration of the conventional example will be described. When the voltage drop detection unit 4 checking the consumption level of the battery power supply 2 detects the battery consumption voltage, the voltage drop signal A is output to the unplug accepting unit 5, the timer unit 6, and the gas cutoff control unit 8. The gas cutoff control unit 8 to which the voltage drop signal A has been input outputs the first cutoff command signal B1 to operate the cutoff valve 3 and close the gas passage. When the voltage drop signal A is input, the timer unit 6 starts counting, and until the timer unit 6 finishes counting for a predetermined time, there is an opening request to the opening acceptance unit 5, and the opening request signal C Is output, the gas cutoff control unit 8 opens the cutoff valve 3. When the timer section 6 finishes counting, the plug opening end signal D is output, so the plug opening function stop section 7 outputs the plug opening stop signal E and stops accepting the plug opening request. The gas cutoff device 1 to which the closing stop signal E is inputted outputs the second cutoff command signal B2 to close the cutoff valve 3.

In the gas shut-off device 1 attached to the flow path through which the medium gas such as city gas or LP gas flows, the voltage drop detection unit 4 measures the voltage of the battery power source 2 at predetermined time intervals and monitors the degree of battery consumption. Yes. A lower limit voltage at which the gas shut-off device 1 can be operated is set in advance as an operation guarantee voltage, and a voltage value when the voltage is reversed for a required number of days from here is set as a battery consumption voltage. The voltage drop detection unit 4 monitors the battery voltage and detects the battery voltage when the battery is consumed. That is, after the battery consumption voltage is detected for the required number of days, the shutoff valve 3 can be opened only during the period when the voltage of the battery power supply 2 drops to the operation guarantee voltage, and a grace period is provided until the gas shutoff device 1 is replaced. Is.
Japanese Patent Laid-Open No. 10-103546

However, the conventional configuration has the following problems. When the voltage drop detection unit monitors the battery voltage at predetermined time intervals and determines the battery voltage drop at the time of exhaustion, the battery voltage drops due to a temporary drop in temperature exceeding the guaranteed temperature. In order to detect battery voltage drop (which is affected) and to prevent false detection due to external noise, the above-mentioned detection determination is performed by continuously detecting battery voltage drop N times at predetermined time intervals. The battery voltage drop determination is performed at the same time.

  However, when the battery power supply unit exceeds a certain usage capacity, there is a large variation in the rate of decrease in battery voltage due to individual variations in the battery power supply unit and differences in usage environments. As a result, in the worst case, the battery voltage decreases more than the predetermined battery consumption voltage during N consecutive detections, and the shutoff valve cannot be operated after a predetermined time from the battery voltage decrease determination. Cases are also conceivable.

  In order to prevent this, it is possible to set the battery consumption voltage to a high value that can cope with all battery voltage drop speeds. It had the problem that it was not right.

  In order to solve the above-mentioned problems, the present invention provides a battery usage time measurement unit that measures usage time from the start of supply of the battery power supply unit, a battery usage time limit setting unit that sets a usage time limit of the battery power supply unit, and a battery usage time When the battery usage time of the measuring unit is compared with the battery usage time limit of the battery usage time limit setting unit and it is determined that the battery usage time has reached the battery usage time limit, a battery usage time determination unit that outputs a timing signal, and a battery power source unit The voltage is monitored at predetermined intervals, and the battery voltage drop is determined based on the number of times this voltage has reached the predetermined battery consumption voltage, and the time signal of the battery usage time determination unit The number of continuous detections for determining the battery voltage drop is changed according to the presence or absence, and when there is no timing signal, the battery voltage drop is determined when a predetermined number of continuous detections (N times) is detected. Signal When the number of consecutive detections (number of times less than N) is detected, the battery voltage drop is determined and the battery voltage drop output is output to the next stage. A voltage drop detection unit is provided, the battery expiration date setting unit can set a plurality of battery expiration dates, and the battery usage time determination unit outputs a time signal every time a plurality of battery expiration dates are reached. The battery voltage drop is determined when the number of consecutive detections (number of times reduced from N) is less than the predetermined number of consecutive detections (N) set in accordance with the output time signal. It is.

  According to the above invention, since the battery voltage drop determination is performed N times continuously before the battery power supply unit exceeds a certain usage capacity, the conventional reliable determination can be made.

  In addition, after the battery power supply unit exceeds a certain usage capacity, the battery voltage drop determination is quickly performed with a value less than N times, so that a predetermined battery consumption voltage can be obtained during N consecutive detections. However, it is possible to reduce the problem that the battery voltage is lowered and the shutoff valve cannot be operated after a predetermined time from the battery voltage drop determination.

  In order to prevent this, it is possible to set the battery consumption voltage to a high value that can handle all battery voltage drop speeds, but there will be a battery voltage drop judgment for the battery power supply unit before its lifetime. Economic problems can be reduced.

  Furthermore, since there are a plurality of expiration dates, the number of battery voltage determinations corresponding to the usage capacity of the battery power supply can be set even when the variation in the battery voltage drop rate gradually increases over time. Therefore, it is possible to more reliably determine the battery voltage according to the battery voltage decrease rate.

  According to the gas shut-off device of the present invention, since the battery voltage drop determination is performed N times continuously before the battery power supply exceeds a certain usage capacity, the conventional reliable determination can be made.

  In addition, since the battery voltage drop determination can be quickly performed with a value less than N times after the battery power supply unit exceeds a certain usage capacity, a predetermined battery can be used during N consecutive detections. It is possible to reduce the problem that the battery voltage decreases more than the consumption voltage, and the shutoff valve cannot be operated after a predetermined time from the battery voltage decrease determination.

  In order to prevent this, it is possible to set the battery consumption voltage to a high value that can handle all battery voltage drop speeds, but there will be a battery voltage drop judgment for the battery power supply unit before its lifetime. Economic problems can be reduced. This has the effect of providing a gas shutoff device that is safer and more economical than the prior art.

  Furthermore, since there are a plurality of expiration dates, the number of battery voltage determinations corresponding to the usage capacity of the battery power supply can be set even when the variation in the battery voltage drop rate gradually increases over time. Therefore, it is possible to more reliably determine the battery voltage according to the battery voltage decrease rate.

  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 supply unit that supplies operating power to a device including the shut-off valve, and a usage time from the start of supply of the battery power supply unit A battery usage time measurement unit that measures the battery usage time, a battery usage time setting unit that sets a usage time limit of the battery power supply unit, a battery usage time of the battery usage time measurement unit, and a battery usage time limit of the battery usage time limit setting unit. When the battery usage time is determined to have reached the battery expiration date, the battery usage time determination unit that outputs a timing signal and the voltage of the battery power supply unit are monitored at predetermined intervals, and this voltage is determined in advance. Continuous detection for determining battery voltage drop based on the number of times that the battery consumption voltage has been continuously detected and determining whether or not the battery usage time determination unit has a time signal If there is no timing signal, the battery voltage drop is determined when a predetermined number of consecutive detections (N times) is detected. If there is a timing signal, the predetermined number of consecutive detections is determined. A battery voltage drop detection unit that determines a battery voltage drop and detects a battery voltage drop output to the next stage when detecting a number of consecutive detections less than (N times) (number of times reduced from N times); The unit can set a plurality of battery expiration dates, the battery usage time determination unit outputs a timing signal each time a plurality of battery expiration dates are reached, and the voltage drop detection unit responds to the output timing signal The battery voltage drop is determined when a number of consecutive detections (number of times less than N) less than the predetermined predetermined number of consecutive detections (N) is detected.

  Since the battery voltage drop determination is performed N times continuously before the battery power supply unit exceeds a certain usage capacity, the conventional reliable determination can be made. In addition, after the battery power supply unit exceeds a certain usage capacity, the battery voltage drop determination is quickly performed with a value less than N times, so that a predetermined battery consumption voltage can be obtained during N consecutive detections. However, it is possible to reduce the problem that the battery voltage is lowered and the shutoff valve cannot be operated after a predetermined time from the battery voltage drop determination.

  In order to prevent this, it is possible to set the battery consumption voltage to a high value that can handle all battery voltage drop speeds, but there will be a battery voltage drop judgment for the battery power supply unit before its lifetime. Economic problems can be reduced.

Furthermore, since there are a plurality of expiration dates, the number of battery voltage determinations corresponding to the usage capacity of the battery power supply can be set even when the variation in the battery voltage drop rate gradually increases over time. Therefore, it is possible to more reliably determine the battery voltage according to the battery voltage decrease rate.

  Further, the battery expiration date setting unit is characterized in that the setting of the battery expiration date can be switched from outside the apparatus.

  Since the expiration date can be switched from outside the device, it is possible to switch the expiration date in accordance with the region (for example, a cold region) where the device is shipped even after the device is manufactured. Due to this, the expiration date taking into account the difference in the rate of decrease in the battery voltage after the power supply voltage exceeds a certain usage capacity due to the usage environment (for example, the expiration date for the battery voltage is lower in cold regions) Therefore, it is possible to more reliably determine the battery voltage in accordance with the battery voltage decrease rate.

  In addition, the number of continuous detections set in the battery voltage drop detection unit when the battery voltage drop output is output to the next stage is stored.

  Based on this memory, it is possible to analyze the usage status of the battery power supply in what state the battery voltage drop was determined. Based on this analysis, the expiration date of the battery expiration date setting unit is actually used. It is possible to judge whether the value conforms to By setting the expiration date based on this determination, it is possible to more reliably determine the battery voltage according to the battery voltage decrease rate.

  In addition, the number of continuous detections set in the voltage drop detection unit is displayed.

  By viewing this display, the state of the used capacity of the battery power supply unit of the apparatus can be understood, and it can be recognized that the battery power supply unit is approaching the end of life by displaying the reduced number of battery voltage determinations.

  Further, the information in which the number of determinations of the battery voltage is reduced is output to the outside.

  And by knowing this information, it is possible to know in real time that the used capacity of the battery power supply unit of the device has exceeded a certain value, and it is possible to more accurately recognize that the life of the battery power supply unit is approaching.

(Example 1)
Hereinafter, although the Example of this invention is described with a gas interruption | blocking apparatus, this invention may be battery voltage determination apparatuses, such as not only gas but water supply, electric power, and combustion fuel. FIG. 1 is a control block diagram of the gas shut-off device of the present invention.

  In the figure, there are 9 power supply voltage units. Reference numeral 10 denotes a battery usage time measurement unit, which measures the usage time from the start of supply of the battery power supply unit 9. A battery expiration date setting unit 11 sets the expiration date. A battery usage time determination unit 12 compares the battery usage time with the battery usage time limit, and outputs a timing signal to the next stage when the battery usage time exceeds the battery usage time limit. Reference numeral 13 denotes a voltage drop detection unit that monitors the battery voltage of the battery power supply unit 9 at regular time intervals. Reference numeral 14 denotes a display unit, which is provided to display a time signal if it is present.

Next, the operation and action will be described. The battery usage time determination unit 12 measures the usage time from the start of supply of the battery power supply unit 9 by the battery usage time measurement unit 10, and sets the preset usage date of the battery usage time limit setting unit 11. If it exceeds, a time signal is output. Here, the installation value for the expiry date is the amount of battery consumption used by the device per unit time (generally the value is almost constant since the operation pattern of the device is constant. If there is variation, it is the worst for safety. Value of the battery power supply unit 9 that causes a large variation in the rate of decrease in battery voltage based on the value used) (which varies depending on the type of battery, but several tens of percent of the battery capacity is a guideline) It is. Based on the above-mentioned time signal, the battery drop detection unit 13 continuously detects N times (for example, 2 to 3 times) before inputting the time signal, and the number of times (for example, once) less than N times after the time signal is input. The battery voltage drop is judged when continuously detected. Further, the display unit 14 displays that a time signal has been input, and informs the person (for example, gas supplier, general user, etc.) related to this apparatus that the battery power source unit 9 is near the end of its life.

FIG. 1 is a control block diagram of the gas cutoff device according to the first embodiment of the present invention. Control block diagram of a conventional gas shut-off device

Explanation of symbols

2 Battery power supply means 3 Blocking means 9 Battery power supply section 10 Battery usage time measurement section 11 Battery expiration date setting section 12 Battery usage time determination section 13 Battery decrease determination section 14 Display section

Claims (5)

In a gas shut-off device comprising a shut-off valve that shuts off the gas passage at the time of an abnormality, and a battery power supply unit that supplies operating power to a device including the shut-off valve,
A battery usage time measuring unit for measuring a usage time from the start of supply of the battery power supply unit, a battery usage time limit setting unit for setting a usage time limit of the battery power supply unit, a battery usage time of the battery usage time measuring unit, and the Comparing the battery expiration date of the battery expiration date setting unit and determining that the battery usage time has reached the battery expiration date, a battery usage time determination unit that outputs a timing signal, and a predetermined constant voltage of the battery power supply unit The battery voltage drop is determined based on the number of times that the voltage reaches a predetermined battery consumption voltage continuously monitored, and the battery usage time determination unit determines whether the time signal is present or not. When the number of continuous detections for determining the voltage drop is changed and there is no time signal, the battery voltage drop is determined when a predetermined number of continuous detections (N times) is detected, and there is a time signal A voltage drop detection unit for determining a battery voltage drop when detecting a number of continuous detections (a number of times less than N) less than a predetermined number of continuous detections (N times), and outputting a battery voltage drop output to the next stage. With
The battery expiration date setting unit can set a plurality of battery expiration dates, the battery usage time determination unit outputs a time signal every time a plurality of battery expiration dates are reached, and the voltage drop detection unit is output A gas shut-off device that determines a battery voltage drop when detecting a number of consecutive detections (number of times less than N) that is less than the predetermined number of consecutive detections (N times) set in accordance with a timing signal. The gas cutoff device according to claim 1, wherein the battery expiration date setting unit can switch the setting of the battery expiration date from outside the device. The gas cutoff device according to claim 1, wherein the number of continuous detections set in the battery voltage drop detection unit when the battery voltage drop output is output to the next stage is stored. The gas cutoff device according to claim 1, wherein the number of continuous detections set in the voltage drop detection unit is displayed. The gas shutoff device according to claim 1, wherein information indicating that the number of battery voltage determinations has been reduced is output to the outside.

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