JP4099881B2 - Gas shut-off device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas shut-off device that ensures the safety of gas use when using gas after a gas meter.
[0002]
[Prior art]
Conventionally, in this type of gas shut-off device, as shown in FIG. 9, the flow rate sensor unit 1 outputs a flow rate pulse signal A when a certain amount of gas passes through the gas passage, and the flow rate judgment unit 2 receives the flow rate sensor. When the flow rate pulse signal A of the unit 1 is received, a gas flow rate value is calculated, and when the gas flow rate value exceeds a predetermined value held in advance, a closing signal B is output. The forced cutoff request from the outside is detected and a forced cutoff signal D is output, and the valve drive unit 3 receives the closing signal B of the flow rate determination unit 2 or the forced cutoff signal D of the forced cutoff determination unit 5. When received, the valve closing drive signal C is output, and when the valve 4 receives the valve closing drive signal C of the valve driving unit 3, the valve 4 closes the gas passage.
[0003]
[Problems to be solved by the invention]
However, in the conventional gas shut-off device, since the gas shut-off device is operated by a battery, there is no forced shut-off for confirming the gas passage closing ability (whether the battery cannot be shut down due to exhaustion). Because it can be accepted at any time, the gas passage was closed even when the gas user was using gas.
[0004]
This means that a person who has learned the operating procedure for forced shut-off (a person who is not an official worker such as a child) is forced to shut off as a mischief rather than confirming the ability to close the original gas passage. Had the problem of obstructing use.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention 1 calculates a gas flow rate value from a flow rate sensor unit that detects a gas flow rate passing through the gas passage and a flow rate signal of the flow rate sensor unit, and the gas flow rate value is held in advance. A flow rate determining unit that outputs a closing signal when a predetermined value is exceeded, a forced cutoff input means that detects a forced cutoff request from the outside and outputs a forced cutoff signal, a flow rate signal of the flow rate sensor unit, and the A forced shut-off determining unit that outputs a forced closing signal based on a forced shut-off signal of the forced shut-off input means, and a valve closing drive signal when receiving a closing signal from the flow rate determining unit or a forced closing signal from the forced shut-off determining unit An output valve driving unit; and a valve that closes a gas passage when receiving a valve closing drive signal from the valve driving unit, and the forced shut-off determination unit has no gas flow rate than a flow rate signal of the flow rate sensor unit. Judgment When a predetermined predetermined time has elapsed, the forced cutoff signal can be received from the forced cutoff input means, and a forced closure signal is output when it is determined that a forced cutoff signal has been input. By detecting whether a person is using gas and not using a gas passage by forced shut-off if gas is being used, it is possible to prevent unreasonable gas stops during cooking, bathing, etc. The convenience of the gas user can be improved, and the emergency dispatch of the gas engineer for carrying out the plugging work of the gas passage can be reduced.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
A flow rate sensor unit that detects the flow rate of gas passing through the gas passage, and a gas flow rate value calculated from the flow rate signal of the flow rate sensor unit, and when the gas flow rate value exceeds a predetermined value that is held in advance, a closing signal Based on the flow rate signal output from the flow rate sensor and the forced cutoff signal from the forced cutoff input means. A forced shut-off determining unit that outputs a closing signal, a valve driving unit that outputs a valve closing drive signal upon receiving a closing signal from the flow rate determining unit or a forced closing signal from the forced shut-off determining unit, and a valve driving unit And a valve that closes the gas passage when the valve closing drive signal is received, and when the forced shut-off determination unit determines that there is no gas flow rate from the flow rate signal of the flow rate sensor unit, after a predetermined time elapses To allow the acceptance of the forced interruption signal from the serial forced cutoff input unit, in which to output the forced plugging signal when determining the entry has been forced shutdown signal.
[0007]
【Example】
Below, it will be described with reference to the accompanying drawings embodiments of the present invention.
[0008]
Example 1
FIG. 1 is a functional block diagram of a gas cutoff device according to Embodiment 1 of the present invention. FIG. 2 is a program flow diagram of the first embodiment.
[0009]
In FIG. 1, the flow rate sensor unit 1 outputs a flow rate pulse signal A when a certain gas passes through the gas passage (for example, the same effect can be obtained even if a flow rate sensor that can measure the instantaneous flow rate in the gas passage is used. ). The flow rate determination unit 2 calculates a gas flow rate value from the flow rate pulse signal A of the flow rate sensor unit 1, and outputs a closing signal B when the gas flow rate value exceeds a predetermined value held in advance.
[0010]
The forced cutoff input means 5 detects a forced cutoff request from the outside (for example, input by a push switch or the like) and outputs a forced cutoff signal D. The forced cutoff determination unit 6 receives the forced cutoff signal D of the forced cutoff input means 5, and the flow rate pulse signal A of the flow rate sensor unit 1 is a predetermined interval or longer (for example, if it is an interval of 2 minutes or longer). There is a sufficient possibility that no gas is used, and a waiting time is required from the time when the gas engineer has stopped using the gas to the time that the gas user stops using the gas in order to perform the forced shutdown. The forced closure signal E is output in the case where the input is made at a minimum and the convenience is improved).
[0011]
When the valve drive unit 3 receives the closing signal B from the flow rate determination unit 2 or the forced closing signal E from the forced cutoff determination unit 6, the valve driving unit 3 outputs the valve closing drive signal C. When the valve 4 receives the valve closing drive signal C from the valve driving unit 3, the valve 4 closes the gas passage.
[0012]
Next, the operation and action will be described. FIG. 2 shows a program flow of the above means from process T1 to process T8. Now, it is assumed that the flow from the start to the end of processing is periodically processed by an interval calendar or the like.
[0013]
In the flow sensor unit 1 of the gas shut-off device, the process T1 detects whether a certain gas has passed through the gas passage and proceeds to the process T2. In the process T2, when there is a gas flow rate, the process proceeds to the process T3, and when there is no gas flow rate, the process proceeds to the process T6. (For example, the same effect can be obtained by using a flow sensor that can measure the instantaneous flow rate in the gas passage)
When the process T3 in the flow rate determination unit 2 exceeds a predetermined value held in advance (for example, when a gas flow rate exceeding the design standard of the gas shut-off device is detected), the process proceeds to process T4, and does not exceed Ends the process. In the valve drive unit 3, the process T4 outputs a closing signal and proceeds to the process T5. In the valve 4, the process T5 closes the gas passage and ends the process. When the time (for example, 2 minutes or more) that has been held in advance has elapsed (for example, 2 minutes or more), the forced cutoff determination unit 6 proceeds to process T7, and ends the process if it has not elapsed.
[0014]
The forced cutoff input means 5 detects a forced cutoff request from the outside (for example, input by a push switch or the like), and proceeds to processing T8. The process T8 shifts to the process T4 when there is a forced cutoff request, and ends the process when there is no forced cutoff request.
[0015]
(Example 2)
FIG. 3 is a functional block diagram of the gas shutoff device according to Embodiment 2 of the present invention. FIG. 4 is a program flow diagram of the second embodiment. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0016]
The difference from the first embodiment is that in the functional block diagram of FIG. 3, the permission signal input means 7 detects a signal indicating whether the gas cutoff device may accept forced cutoff (for example, input by a push switch or the like, or The same effect can be obtained by communication from a central monitoring device that centrally monitors each gas shut-off device using a wired or wireless signal from a control panel installed in the home or a public communication line such as a telephone. The forced cutoff permission signal F is output.
[0017]
While receiving the forced cutoff permission signal F from the permission signal input means 7, the cutoff permission determination unit 8 outputs a forced closing signal E when receiving the forced cutoff signal D from the forced cutoff input means 5.
[0018]
Next, a specific description of operation and action will be given with reference to FIG.
[0019]
FIG. 4 shows a program flow of the above means from process T1 to process T10. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0020]
However, the process T6 is a missing number. Note that the process T2 proceeds to the process T7 when there is no gas flow rate, and the process T3 proceeds to the process T7 when it does not exceed the predetermined value held in advance.
[0021]
In the permission signal input means 7, the process T9 detects a signal that transmits whether the gas shut-off device may accept the forced shut-off (for example, input by a push switch or the like, wired from an operation panel installed in the home, or The same effect can be obtained by communication from a center monitoring device that centrally monitors each gas shut-off device using a wireless communication line or a public communication line such as a telephone.
[0022]
In the block permission determination unit 8, the process T10 proceeds to the process T4 when the forced block is permitted, and ends the process when the block is not permitted.
[0023]
(Example 3)
FIG. 5 is a functional block diagram of the gas cutoff device according to Embodiment 3 of the present invention. FIG. 6 is a program flow diagram of the third embodiment. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0024]
The difference from the first embodiment is that in the functional block diagram of FIG. 5, the automatic return determination unit 9 receives the forced cutoff signal D of the forced cutoff input means 5, and the flow rate pulse signal A of the flow rate sensor unit 1 is held in advance. Over a certain interval (for example, 2 minutes or more. If it is 2 minutes or less, there is a high possibility that the gas is being used, and in order to prevent gas outflow in a misfire state that occurs when the gas passage is closed and then opened) ), An automatic return signal G is output.
[0025]
When the leak determination unit 10 receives the automatic return signal G from the automatic return determination unit 9, a gas leak (for example, no flow pulse signal is generated within 2 minutes. Similar effects can be obtained by monitoring pressure fluctuations. .) Is detected and the opening signal H is output.
[0026]
When the bidirectional valve drive unit 11 receives the closing signal B of the flow rate determination unit 2 or the forced cutoff signal D of the forced cutoff input means 5, it outputs a valve closing drive signal C and opens the leakage determination unit 10. When H is received, a valve opening drive signal I is output. The bidirectional valve 12 closes the gas passage when it receives the valve closing drive signal C from the bidirectional valve drive section 11 and opens the gas passage when it receives the valve opening driving signal I.
[0027]
Next, a specific description of the operation and action will be given with reference to FIG.
[0028]
FIG. 6 shows a program flow of the above means from process T1 to process T27. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0029]
However, processing T6, processing T9, and processing T10 are missing numbers. The process T2 proceeds to process T20 when there is no gas flow rate, the process T3 proceeds to process T13 when it does not exceed the predetermined value held in advance, the process T5 proceeds to process T12, and the process T8. If there is a forced cutoff request, the process proceeds to process T17.
[0030]
In the automatic return determination unit 9, the process T11 determines whether or not the bidirectional valve is being opened. If the valve is open, the process proceeds to process T7, and if it is closed, the process proceeds to process T23. In the bidirectional valve drive unit 11, the process T12 clears the counter and ends the process.
[0031]
In the automatic return determination unit 9, the process T13 determines whether the count is permitted. If the count is permitted, the process proceeds to the process T14. If the count is not permitted, the process ends. In process T14, the timer is counted and the process proceeds to process T15.
[0032]
In process T15, it is determined whether the counter is over. If it is over, the process proceeds to process T16, and if it is not over, the process is terminated. In process T16, the count is prohibited and the process ends.
[0033]
The process T17 is counting (for example, within 40 seconds. If the gas is not used for a long time due to moving, etc., it is desirable to prohibit the automatic return and leave the forced shut-off state. If it is not counting, the process proceeds to process T18, and if it is counting, the process proceeds to process T19.
[0034]
In process T18, automatic return is permitted and the process proceeds to process T4. In process T19, automatic return is prohibited and the process proceeds to process T4. In process T20, it is determined whether there is a flow rate pulse interval equal to or greater than a certain interval (for example, 2 minutes or more). If there is a certain interval or more, the process proceeds to process T21. The process T21 permits automatic return and ends the process. The process T22 prohibits automatic return and ends the process.
[0035]
The process T23 determines whether or not automatic return is permitted. If it is permitted, the process proceeds to process T24, and if it is not permitted, the process is terminated. In the leakage determination unit 10, the process T24 determines a gas leak. If the gas is leaking, the process proceeds to the process T22, and if the gas is not leaking, the process proceeds to the process T25. In the bidirectional valve drive unit 11, the process T25 outputs a plug opening signal and proceeds to the process T26. In the bidirectional valve 12, the process T26 opens the gas passage and proceeds to the process T27.
[0036]
In the bidirectional valve drive unit 11, the process T27 allows the count and ends the process.
[0037]
Example 4
FIG. 7 is a functional block diagram of the gas cutoff device according to Embodiment 4 of the present invention. FIG. 8 is a program flow diagram of the fourth embodiment. Note that components having the same reference numerals as those of the third embodiment have the same structure and description thereof is omitted.
[0038]
The difference from the third embodiment is that, in the functional block diagram of FIG. 4, the re-input determination unit 13 receives the forced cutoff signal D of the forced cutoff input means 5 and within a predetermined time (for example, within 60 seconds) held in advance. When the forced cutoff signal D of the forced cutoff input means 5 is received again, the forced closing signal E is output.
[0039]
The LED communication unit 14 receives the forced cutoff signal D of the forced cutoff input means 5, and communicates (using a reed switch and LED) when receiving an LED communication request signal from the outside within a predetermined time (for example, within 40 seconds). Non-contact communication).
[0040]
Next, a specific description of the operation and action will be given with reference to FIG.
[0041]
FIG. 8 shows a program flow of the above means from process T1 to process T42. Note that components having the same reference numerals as those of the third embodiment have the same structure and description thereof is omitted.
[0042]
However, processing T6, processing T9 to processing T27 are omitted. If the gas flow rate is not present in the process T2, the process ends. If the process T3 does not exceed the predetermined value held in advance, the process ends. If the process T8 has a forced shut-off request, the process proceeds to the process T39. Shall be migrated.
[0043]
In the re-input determination unit 13, the process T28 determines whether the count start of the counter 1 is permitted. If permitted, the process proceeds to process T29. If not permitted, the process T28 proceeds to process T35. In process T29, the counter 1 is counted and the process proceeds to process T30.
[0044]
In the LED communication unit 14, the process T30 detects the presence or absence of an LED communication start signal (for example, input by a push switch). If there is a start signal, the process proceeds to process T31. If there is no start signal, the process proceeds to process T32. . In process T31, LED communication is performed, and the process proceeds to process T32.
[0045]
In the re-input determination unit 13, the process T32 determines whether the counter 1 has exceeded (for example, 40 seconds). If it has exceeded, the process proceeds to process T33, and if not, the process proceeds to process T35. In process T33, the count of the counter 1 is prohibited and the process proceeds to process T34. The process T34 permits the count of the counter 2 and proceeds to the process T35.
[0046]
The process T35 determines whether the count start of the counter 2 is permitted. If permitted, the process proceeds to process T36, and if not permitted, the process proceeds to process T7. In process T36, the counter 2 is counted and the process proceeds to process T37. The process T37 determines whether or not the counter 2 has exceeded (for example, 60 seconds). If it has exceeded, the process proceeds to process T38, and if not, the process proceeds to process T7.
[0047]
In process T39, it is determined whether the counter 1 is counting. If the counter 1 is counting, the process proceeds to process T42. If not counting, the process proceeds to process T40. The process T40 determines whether the counter 2 is counting. If the counter 2 is counting, the process proceeds to process T41. If the counter T2 is not counting, the process proceeds to process T42. The process T41 permits the count of the counter 1 and proceeds to the process T4. The process T42 permits the count of the counter 1 and ends the process.
[0048]
【The invention's effect】
As is apparent from the above description, the gas cutoff device of the present invention has the following effects.
[0049]
According to the first aspect of the present invention, it is possible to prevent the gas user from being forcibly cut off due to mischief while using the gas, and to reduce the number of emergency dispatches of the gas builder due to the forced cutoff, thereby improving convenience. In addition, by setting the time from stopping the use of gas to accepting forced shut-off for 2 minutes, for example, the gas engineer stops the gas user from using the gas and explains the gas work. Since the forced shut-off is possible, workability is not reduced. In addition, even if a third party learns the forced shut-off operation, there is no certainty because it may or may not operate depending on the use of gas, and the gas user cannot use gas because it does not stop during gas use. It is thought that there is no tampering effect, and that the effect of tampering is reduced and the effect of tampering is reduced by the fact that the effect of tampering is reduced and lack of fun, and the number of times of interruption due to tampering is reduced so that the battery driving the gas cutoff device The margin can be reduced. This makes it possible to design a battery with a small capacity, and by using a small battery, the gas shut-off device can be miniaturized, or even if a battery with the same capacity is used, the product life can be extended. it can.
[Brief description of the drawings]
FIG. 1 is a functional block diagram of a gas shut-off device according to a first embodiment of the present invention. FIG. 2 is a program flow diagram of the device. FIG. 3 is a functional block diagram of a gas shut-off device according to a second embodiment of the present invention. Program flow diagram of the apparatus FIG. 5 is a functional block diagram of the gas shut-off device of Embodiment 3 of the present invention. FIG. 6 is a program flow diagram of the apparatus of FIG. 7. Function of the gas shut-off device of Embodiment 4 of the present invention. Block diagram [Fig. 8] Program flow diagram of the device [Fig. 9] Functional block diagram of a conventional gas shut-off device [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flow rate sensor part 2 Flow rate determination part 3 Valve drive part 4 Valve 5 Forced interruption | blocking input means 6 Forced interruption | blocking determination part 7 Permit signal input means 8 Interruption permission determination part 9 Automatic return determination part 10 Leakage determination part 11 Bidirectional valve drive part 12 Bidirectional valve 13 Re-input determination unit 14 LED communication unit

Claims (1)

A flow rate sensor unit that detects a gas flow rate that passes through the gas passage, and a gas flow rate value calculated from the flow rate signal of the flow rate sensor unit, and when the gas flow rate value exceeds a predetermined value that is held in advance, a closing signal Based on the flow rate signal output from the flow rate sensor and the forced cutoff signal from the forced cutoff input means. A forced shut-off determining unit that outputs a closing signal, a valve driving unit that outputs a valve closing drive signal upon receiving a closing signal from the flow rate determining unit or a forced closing signal from the forced shut-off determining unit, and a valve driving unit A valve for closing the gas passage when receiving the valve closing drive signal of
When the forced shut-off determining unit determines that there is no gas flow rate from the flow rate signal of the flow rate sensor unit, the forced shut-off signal can be received from the forced shut-off input means after a predetermined time elapses. A gas shut-off device that outputs a forced closure signal when it is judged that there is an input.

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