JP2004184265A - Gas-blast cut-off valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein a cut-off valve will not operate after a prescribed time exists, even if a voltage drop is detected, when a voltage is markedly decreased during determining battery voltage drop due to dispersion in individual batteries or influence due to the utilization environment, when a battery power source part exceeds a specified use capacity, in a gas-blast cut-off valve. <P>SOLUTION: A battery operating time determining part 12 measures the operating time from supply start of the battery power source part 9 by a battery use time measuring part 12. When the utilization term of a battery utilization term setting part 11 is exceeded, a time check signal is output. When based on the time check signal, a battery fall off determining part 13 performs continuous detection of times reduced from N times (normal decision frequency), after the time check signal has been input, battery voltage fall off is determined. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gas shut-off device that monitors the use state of a gas appliance that uses city gas, LP gas, or the like, and that ensures safety when the power supply capacity of a battery power supply unit is consumed.
[0002]
[Prior art]
2. Description of the Related Art A conventional shut-off device of this type has, for example, a gas shut-off device having a configuration as shown in FIG. FIG. 2 shows a control block diagram of a conventional gas shut-off device.
[0003]
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 shutoff valve for stopping or supplying gas in the flow path.
[0004]
Reference numeral 4 denotes a voltage drop detection unit, which detects a battery voltage taking into account a predetermined time that precedes an operation guarantee voltage in which the capacity of the battery power supply 2 capable of operating the gas cutoff device 1 is left and outputs a voltage drop signal A. . Reference numeral 5 denotes an opening accepting portion, which accepts opening of the shut-off valve when the voltage drop signal A is input, and opens when an opening request (input of an opening signal by an opening request switch or communication) is received. A plug request signal C is output. Reference numeral 6 denotes a timer section which counts a predetermined operation assurance time from when the voltage drop signal A is input and outputs an opening completion signal D. Reference numeral 7 denotes an opening function stopping unit which outputs a closing stop signal E for stopping the opening by the opening request signal C when the opening completion signal D is inputted. Reference numeral 8 denotes a gas cutoff control unit which closes the shutoff valve 3 when the battery voltage drop signal A or the plugging stop signal E is input, and when the opening request signal C is input before the input signal of the plugging stop signal E. The shutoff valve 3 is opened.
[0005]
Next, the operation of the conventional configuration will be described. When the voltage drop detection unit 4 checking the degree of consumption of the battery power supply 2 detects the battery consumption voltage, it outputs a voltage drop signal A to the opening reception unit 5, the timer unit 6, and the gas cutoff control unit 8. The gas shutoff control unit 8 to which the voltage drop signal A has been input outputs the first shutoff command signal B1 to operate the shutoff valve 3 to close the gas passage. The timer section 6 starts counting when the voltage drop signal A is input, and before the timer section 6 finishes counting for a predetermined time, there is an opening request to the opening reception section 5 and an opening request signal C Is output, the gas shutoff control unit 8 opens the shutoff valve 3. When the counting by the timer section 6 is completed, the opening completion signal D is output, so the opening function stopping section 7 outputs the closing stop signal E and stops accepting the opening request. The gas shut-off device 1 to which the plug stop signal E has been input outputs the second shut-off command signal B2 to close the shut-off valve 3.
[0006]
In the gas shut-off device 1 attached to the flow path of the medium gas such as city gas and LP gas, the voltage drop detection unit 4 measures the voltage of the battery power supply 2 at predetermined time intervals and monitors the degree of battery consumption. I have. The lower limit voltage at which the gas shut-off device 1 can be operated is set in advance as the operation assurance voltage, and the voltage value when the voltage rises by the required number of days from here is set as the battery consumption voltage. The voltage drop detection unit 4 monitors the battery voltage and detects the battery voltage at the time of this consumption. That is, a grace period is provided until the gas shut-off valve 3 can be opened and the gas shut-off device 1 is replaced only during a period in which the voltage of the battery power supply 2 is reduced to the operation guarantee voltage after the battery consumption voltage is detected for the required number of days. Things.
[0007]
[Patent Document 1]
JP 10-103546 A
[Problems to be solved by the invention]
However, the conventional configuration has the following problems. When the voltage drop detection unit monitors the battery voltage at predetermined time intervals and determines that the battery voltage has dropped during consumption, the battery voltage drops due to a temporary temperature drop exceeding the guaranteed temperature (generally, the battery voltage is In order to prevent battery voltage drop detection or erroneous detection due to extraneous noise, the above-mentioned detection judgment is performed by performing battery voltage drop detection at predetermined time intervals N times in succession. A voltage drop determination is made.
[0009]
However, when the battery power supply section exceeds a certain used capacity, a large variation occurs in the drop rate of the battery voltage due to the individual variation of the battery power supply section and the difference in the use environment. As a result, in the worst case, the battery voltage drops more than the predetermined battery consumption voltage during the N consecutive detections, and it is not possible to operate the shut-off valve a predetermined time after the battery voltage drop determination. It is possible.
[0010]
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 rates. Had the problem of not being a target.
[0011]
[Means for Solving the Invention]
According to the present invention, in order to solve the above-described problem, the battery use time determination unit measures the use time from the start of supply of the battery power supply unit by the battery use time measurement unit, and exceeds the use time limit of the battery use time setting unit set in advance. And a timing signal is output. (Here, the set value of the expiration date is a value obtained by converting the used capacity of the battery power supply unit into time, which causes a large variation in the speed of the battery voltage drop, based on the battery consumption used by the gas shut-off device per unit time. is there). Based on this time signal, the battery use time judgment unit performs the battery voltage drop judgment when N times are continuously detected before the time signal is input, and when the number of times detected is less than N times after the time signal is input. It is.
[0012]
According to the above invention, the battery voltage drop determination is performed by N consecutive detections before the battery power supply unit exceeds a certain used capacity, so that the conventional reliable determination can be performed.
[0013]
In addition, after the battery power supply unit exceeds a certain used capacity, the battery voltage drop determination is promptly performed with a value less than N times. This also reduces the problem that the battery voltage decreases and the shut-off valve cannot be operated after a predetermined time from the battery voltage reduction determination.
[0014]
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 rates, but there is a case where the battery power supply unit determines that the battery voltage drops before the end of its life. Economic problems can be reduced.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention provides a gas shut-off device including a shut-off valve that shuts off a gas passage when an abnormality occurs and a battery power supply unit that supplies operating power to a device including the shut-off valve. The battery usage time measuring unit to be measured, the battery usage time setting unit to set the usage time of the battery power supply unit, and the battery usage time measurement unit and the battery usage time setting unit are compared to determine the battery usage time. And a battery usage time determination unit that outputs a clock signal when it is determined that the battery power supply unit has been monitored, and monitors the voltage of the battery power supply unit at predetermined time intervals. It is detected that the battery consumption voltage has become equal to or less than the battery consumption voltage set in consideration of the battery consumption for a predetermined time going back from the operation guarantee voltage when N times before the timing signal is input and N after the timing signal is input. Times Ri reduced and is determined when the number of continuous detection is one having a low voltage detection unit for outputting a battery voltage drop output to the next stage.
[0016]
Then, before the battery power supply unit exceeds a certain used capacity, the battery voltage drop determination is performed by N consecutive detections, so that the conventional reliable determination can be performed. In addition, after the battery power supply unit exceeds a certain used capacity, the battery voltage drop determination is promptly performed with a value less than N times. This also reduces the problem that the battery voltage decreases and the shut-off valve cannot be operated after a predetermined time from the battery voltage reduction determination.
[0017]
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 rates, but there is a case where the battery power supply unit determines that the battery voltage drops before the end of its life. Economic problems can be reduced.
[0018]
Also, a battery expiration date setting unit having a plurality of expiration dates of the battery power supply unit, a battery usage time determination unit that outputs a clock signal every time the battery usage time reaches the plurality of battery expiration dates, A voltage drop detection unit is provided for performing a battery voltage drop determination by detecting the number of consecutive times when the number of times corresponding to the set value of the battery expiration date is input is reduced from the number of consecutive times N before the timing signal is output.
[0019]
Also, since a plurality of expiration dates are provided, the number of battery voltage determinations corresponding to the used capacity of the battery power supply unit can be set even when the variation in the rate of decrease in battery voltage gradually increases over time. Therefore, it is possible to more reliably determine the battery voltage according to the rate of decrease in the battery voltage.
[0020]
Further, the battery power supply unit has a plurality of expiration dates, and has a battery expiration date setting unit that can switch the expiration dates from outside the apparatus.
[0021]
Since the expiration date can be switched from outside the device, it is possible to switch the expiration date in accordance with an area to be shipped (for example, a cold region) even after the device is manufactured. As a result, the expiration date that takes into account the difference in the rate of decrease in the battery voltage after exceeding a certain usage capacity of the power supply voltage depending on the usage environment (for example, the expiration date because the battery voltage is lower in cold regions than in cold regions) Is set shorter), so that the battery voltage determination according to the rate of decrease in the battery voltage can be performed more reliably.
[0022]
Further, it has a storage of the number of continuous detections set in the voltage drop detection section when the battery voltage drop output is output to the next stage.
[0023]
Then, based on this memory, it is possible to analyze under what condition the used capacity of the battery power supply unit determines the battery voltage drop, and based on the analysis, the expiration date of the battery expiration date setting unit is actually used. It can be determined whether or not the value conforms to By setting an expiration date based on this determination, it is possible to more reliably determine the battery voltage according to the rate of decrease in the battery voltage.
[0024]
Also, the number of continuous detections set in the voltage drop detection unit is displayed.
[0025]
By looking at this display, the state of the used capacity of the battery power supply unit of the apparatus can be known, and it can be recognized that the life of the battery power supply unit is approaching by displaying the reduced number of battery voltage determinations.
[0026]
Further, the information that the number of times of determination of the battery voltage is reduced is output to the outside.
[0027]
By knowing this information, it is possible to know in real time that the used capacity of the battery power supply unit of the apparatus has exceeded a certain value, and it is possible to more accurately recognize that the life of the battery power supply unit is approaching.
[0028]
【Example】
Hereinafter, an embodiment of the present invention will be described using a gas shut-off device, but the present invention is not limited to gas, and may be a battery voltage determination device for water, electric power, combustion fuel, and the like.
[0029]
(Example 1)
FIG. 1 is a control block diagram of the gas shut-off device of the present invention.
[0030]
In the figure, there are nine power supply voltage parts. Reference numeral 10 denotes a battery usage time measurement unit that measures the usage time from the start of supply of the battery power supply unit 9. Reference numeral 11 denotes a battery expiration date setting unit which sets an expiration date. Reference numeral 12 denotes a battery use time determination unit that compares the battery use time with the battery use time limit, and outputs a clock signal to the next stage when the battery use time exceeds the battery use 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 so as to display a clock signal when there is a clock signal.
[0031]
Next, the operation and operation 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 12, and sets the usage time of the battery usage time setting unit 11 set in advance. When it exceeds, a timing signal is output. Here, the installation value of the expiration date is almost constant because the battery consumption used by the apparatus per unit time (generally, the operation pattern of the apparatus is constant, and if there is a variation, it is the worst for safety. The value obtained by converting the used capacity of the battery power supply unit 12 (which varies depending on the type of the battery, but the standard is several tens of percent of the battery capacity) into time, based on the value of It is. Based on the above-mentioned clock signal, when the battery-low determination unit 13 detects N times (for example, 2 to 3 times) consecutively before the input of the clock signal, and after the clock signal is input, the number of times is less than N times (for example, 1 time). When continuous detection is performed, the battery voltage drop is determined. Further, the display unit 14 displays that the timekeeping signal has been input so as to notify a person (for example, a gas supplier, a general user, or the like) related to this apparatus that the life of the battery power supply unit 9 is near.
[0032]
【The invention's effect】
As described above, according to the present invention, the battery voltage drop determination is performed by N consecutive detections before the battery power supply unit exceeds a certain used capacity, so that the conventional reliable determination can be performed.
[0033]
In addition, after the battery power supply unit exceeds a certain used capacity, the battery voltage drop determination can be performed promptly with a value less than N times. It is possible to reduce the problem that the battery voltage decreases more than the consumption voltage and the shut-off valve cannot be operated after a predetermined time from the battery voltage reduction determination.
[0034]
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 rates, but there is a case where the battery power supply unit determines that the battery voltage drops before the end of its life. Economic problems can be reduced. This has the effect of providing a gas shut-off device which is safer and more economical than the conventional one.
[Brief description of the drawings]
FIG. 1 is a control block diagram of a gas shut-off device according to a first embodiment of the present invention. FIG. 2 is a control block diagram of a conventional gas shut-off device.
2 Battery power supply means 3 Shutoff means 9 Battery power supply unit 10 Battery use time measurement unit 11 Battery use time setting unit 12 Battery use time determination unit 13 Battery decrease determination unit 14 Display unit

Claims (6)

In a gas shut-off device including a shut-off valve for shutting off a gas passage at the time of abnormality and a battery power supply unit for supplying operating power to a device including the shut-off valve, use of a battery for measuring a use time from the start of supply of the battery power supply unit A time measurement unit, a battery expiration date setting unit that sets the expiration date of the battery power supply unit, and a comparison between the battery usage time measurement unit and the battery expiration date setting unit, and that the battery usage time has reached the battery expiration date. And a battery usage time determining unit that outputs a clock signal when determining that the voltage of the battery power supply unit is monitored at predetermined time intervals, and the operation guarantees that this voltage becomes a lower limit value at which the shut-off valve can be operated. The battery consumption voltage set in consideration of the battery consumption for a predetermined period of time retroactive from the voltage is detected when N times continuous detection is performed before the timing signal input, and the number of times that is less than N times after the timing signal input. Gas cutoff apparatus and a voltage drop detection section for outputting to the next stage the determined battery voltage drop output when continuous detection. When a battery expiration date setting unit having a plurality of battery expiration dates is used, a battery usage time determination unit that outputs a clock signal every time the battery usage time reaches a plurality of battery expiration dates, 2. The gas according to claim 1, further comprising: a voltage drop detection unit that determines a battery voltage drop by detecting a number of consecutive times obtained by reducing the number of times according to the set value of the battery expiration date from the number of continuous detections before outputting the clock signal. Shut-off device. The gas shut-off device according to claim 1, further comprising a battery expiration date setting unit that includes a plurality of expiration dates of the battery power supply unit and that can switch the expiration date from outside the device. The gas shut-off device according to any one of claims 1 to 3, wherein the number of continuous detections set in the 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 shut-off device according to any one of claims 1 to 3, wherein the information indicating that the number of times of determination of the battery voltage has decreased is output to the outside.

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