JP2003149018A - Gas cutoff apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further improve safety by a means for accurately registering a minute flow rate. SOLUTION: A switching operation section 2 outputs a switching instruction signal B and a registration permission signal D when a registering signal H in a flow rate retention section 6 is not present and an inspection start signal A in an inspection-starting input section 1 is present. A valve-switching section 3 opens or closes instrument individual valves 101-103 according to the switching instruction signal B, and calculates a flow rate value signal F from the flow rate signal E at a flow rate input section 4. The flow rate retention section 6 outputs the registering signal H when receiving the registration permission signal D, and retains as a retention flow rate value signal G when the flow rate value of the flow rate value signal F is within a specific range. A flow rate judgment section 7 compares the flow rate value signal F with the retention flow rate value signal G, outputs an alarm-reporting signal J to an alarm- reporting section 10 for reporting an alarm if the comparison result is outside a specific range, and outputs a valve drive permission signal I to a valve drive section 8, thus outputting a valve drive signal K to a valve 9 and closing a gas passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shutoff device for ensuring the safety of gas use downstream of a gas shutoff device, and more particularly to a function of registering a minute flow rate.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 11, this type of gas shutoff device outputs a registration permission signal D from a flow rate registration input section 18 and a flow rate input section 4 to a gas passing through a gas passage. When the flow rate calculation unit 5 receives the flow rate signal E from the flow rate input unit 4, the flow rate calculation unit 5 outputs a flow rate value and outputs a flow rate value signal F, and the flow rate holding unit 6 outputs the flow rate signal E. When the registration permission signal D of the registration input unit 18 is received and the flow rate value signal F of the flow rate calculation unit 5 is received, and the flow rate value falls within a predetermined range (for example, 10 L / h to 100 L / h), A plurality of the flow rate values are held as a holding flow rate value signal G, and the flow rate determining unit 7 compares the flow rate value signal F of the flow rate calculating unit 5 with the held flow rate value signal G of the flow rate holding unit 6 and falls outside a predetermined range. If (for example, ± 10% or more), the valve drive permission signal I When the valve drive unit 8 receives the valve drive permission signal I from the flow rate determination unit 7, the valve drive unit 8 outputs a valve drive signal K, and the valve 9 outputs the valve drive signal K from the valve drive unit 8. Upon reception, the gas passage is closed, and the alarm notification unit 10 notifies the alarm when the alarm notification signal J of the flow rate determination unit 7 is received.

[0003]

However, in the conventional gas shutoff device, the shutoff cock 30 on the upstream side of the gas passage is used.
1 and all the original cocks 302 on the downstream side are closed to confirm that there is no gas leakage, and then each individual gas appliance (20
1-203), the flow rate of the pilot burner that assists ignition of the gas appliance was measured. Further, because of such a registration procedure of the minute flow rate, the minute flow rate including the piping leakage between all the original cocks 302 on the downstream side and the individual gas appliances (201 to 203) and the leakage in the gas appliance is controlled by the pilot burner. I had to allow it to be registered as a flow rate. For this reason, it is not possible to distinguish between the flow rate of the pilot burner and the piping leak between the individual gas appliances (201 to 203) on the downstream side and the leaks in the gas appliances (201 to 203). Was used.

[0004]

In order to solve the above-mentioned problems, the present invention is to install individual appliance individual valves in the vicinity of individual gas appliances (201 to 203). According to the present invention, since it becomes possible to confirm the piping leak between the individual gas appliances from the original cock 302, it is possible to eliminate the piping leak included in the flow rate of the pilot burner in the conventional registration method. Therefore, the safety can be further improved.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is as follows.
Checks the presence / absence of a registration-in-progress signal when an inspection start signal is output when an activation timing to start the flow registration of a gas appliance is detected, and an inspection start signal is received. A switching operation unit that outputs a switching instruction signal that allows the flow rate to be registered, a valve switching unit that outputs a switching signal that sequentially opens and closes the individual valve of the appliance when the switching instruction signal is received, and a gas passage Flow rate input section that outputs a flow rate signal corresponding to the gas flow rate passing through, a flow rate calculation section that calculates a flow rate value when a flow rate signal is received and outputs a flow rate value signal, and a signal that is being registered when a registration permission signal is received. When the flow rate value signal is received and the flow rate value falls within a predetermined range, the flow rate holding unit that stops the output of the registering signal and holds the flow rate value as a plurality of flow rate value signals,
A flow rate determination unit that compares the flow rate value signal and the held flow rate value signal and outputs a valve drive permission signal and an alarm notification signal if the flow rate value signal is out of a predetermined range, and a valve that outputs a valve drive signal when the valve drive permission signal is received. It has a drive unit, a valve that closes the gas passage when a valve drive signal is received, and an alarm notification unit that issues an alarm when an alarm notification signal is received.

Further, the invention according to claim 2 determines whether or not there is a valve residual signal when an inspection start signal is output when an activation timing for starting the flow rate registration of the gas appliance is detected and when an inspection start signal is received. Check if there is an uninspected gas appliance remaining, check if there is a signal being registered, and if not registered, output a switching instruction signal to control the individual valve of the appliance and a registration permission signal to allow registration of the flow rate. Automatic switching operation part and the number of gas appliances to be inspected are detected by the individual valve of the appliance, and if there is a gas appliance requiring inspection, a valve residual signal is output,
When a switching instruction signal is received, a valve switching detection unit that outputs a switching signal that sequentially opens and closes the appliance individual valve, a flow rate input unit that outputs a flow rate signal corresponding to the gas flow rate passing through the gas passage, and a flow rate signal When receiving, the flow rate calculation unit that calculates the flow rate value and outputs the flow rate value signal, and when the registration permission signal is received outputs the signal being registered, and when the flow rate value signal is received and the flow rate value falls within the predetermined range, A flow rate holding unit that stops the output of signals during registration and holds multiple flow rate values as flow rate value signals is compared with the flow rate value signal and the held flow rate value signal. And a flow rate determination unit that outputs an alarm notification signal, a valve drive unit that outputs a valve drive signal when a valve drive permission signal is received, a valve that closes the gas passage when a valve drive signal is received, and an alarm notification signal that is received. With an alarm notification unit that gives an alarm Those having.

According to the third aspect of the present invention, an inspection start input section for outputting an inspection start signal when the activation timing for starting the flow rate registration of the gas appliance is detected, and the presence or absence of a signal being registered when the inspection start signal is received. Confirm and check if there is a leak if there is a plugging instruction signal in the input part, and register the switching instruction signal and flow rate to control the appliance individual valve with the appliance individual valve for which closure is instructed fixedly closed A switching operation unit that outputs a registration permission signal, a valve switching unit that outputs a switching signal that sequentially opens and closes the appliance individual valve when the switching instruction signal is received, and a flow rate corresponding to the gas flow rate passing through the gas passage. A flow rate input section that outputs a signal, a flow rate calculation section that calculates a flow rate value when a flow rate signal is received, and outputs a flow rate value signal,
When the registration permission signal is received, the registering signal is output, and when the flow rate value signal is received and the flow rate value is within the predetermined range, the output of the registering signal is stopped and the flow rate value is retained. If there is a signal being registered, the flow rate holding unit is checked, and if there is a signal being registered, the flow rate value signal is compared with the held flow rate value signal. If there is a signal, the output of the warning signal is stopped if there is a plugging instruction signal, and if there is no signal being registered, the flow rate value signal and the held flow rate value signal are compared. If it is outside the specified range, the valve drive permission signal And a leak flow rate determination unit that outputs an alarm notification signal, a valve drive unit that outputs a valve drive signal when a valve drive permission signal is received, a valve that closes the gas passage when a valve drive signal is received, and an alarm notification signal Then, the alarm notification unit that notifies the alarm and the leak Those having a leakage chromatic input unit for outputting a plugging instruction signal when the certification.

The invention according to claim 4 is the inspection start input section for outputting an inspection start signal when the activation timing for starting the flow rate registration of the gas appliance is detected, and the presence or absence of a signal being registered when the inspection start signal is received. If there is no plugging instruction signal, confirm whether there is a plugging instruction signal, and switch the instruction signal to control the instrument individual valve with the instrument individual valve that is instructed to be closed and fix it, and the registration permission signal to permit the registration of the flow rate. And a switching operation section that outputs a switching instruction signal, a valve switching section that outputs a switching signal that sequentially opens and closes the appliance individual valve when a switching instruction signal is received, and a flow rate signal that corresponds to the gas flow rate passing through the gas passage. A flow rate input section, a flow rate calculation section that calculates a flow rate value when a flow rate signal is received and outputs a flow rate value signal, and a registration in progress signal is output when a registration permission signal is received and a flow rate value signal is received and If it is outside the specified range, compare the flow rate value signal and the held flow rate value signal with the flow rate holding section that stops the output of the signal being registered and holds multiple flow rate values as flow rate value signals. For example, a flow rate determination unit that outputs a valve drive permission signal and an alarm notification signal, a valve drive unit that outputs a valve drive signal when the flow rate determination unit receives the valve drive permission signal, and a gas passage that receives a valve drive signal. A valve to be closed, an alarm notification unit that notifies an alarm when an alarm notification signal is received, an external communication unit that communicates device information with the outside when a holding flow value signal is received, and outputs a leak range signal from the device information, a leak When the range signal is received, the holding flow rate value signal is acquired, and when the holding flow rate value signal does not fall within the leak range signal, the capping instruction signal and the warning notification signal are output.

Further, the invention according to claim 5 is such that an inspection start input section for outputting an inspection start signal when the activation timing for starting the flow rate registration of the gas appliance is detected, and the presence or absence of a valve residual signal when the inspection start signal is received. If there is an uninspected gas appliance remaining, check whether there is a signal during registration, and if not registered, output a switching instruction signal to control the individual valve of the appliance and a registration permission signal that permits registration of the flow rate Automatic The switching operation unit and the number of gas appliances to be inspected are detected by a wireless appliance with a built-in appliance individual valve, and if there is a gas appliance that requires inspection, a valve residual signal is output and the appliance individual valve is opened when the switching instruction signal is received. A valve switching communication section that outputs a switching communication signal that opens and closes in order, a flow rate input section that outputs a flow rate signal corresponding to the gas flow rate passing through the gas passage, and a flow rate value that is calculated when the flow rate signal is received. When the flow rate calculation unit that outputs the signal and the registration permission signal are received, the signal that is being registered is output, and if the flow rate value signal is received and the flow rate value is within the specified range, the output of the signal that is being registered is stopped. Holds a plurality of flow rate values as a flow rate value signal and compares the flow rate value signal with the flow rate value signal held by the flow rate holding section, and outputs a valve drive permission signal and an alarm notification signal if the flow rate value signal is outside the specified range. A flow rate determining unit, a valve driving unit that outputs a valve driving signal when receiving a valve driving permission signal, and a valve that closes the gas passage when receiving the valve driving signal,
And an alarm notification unit for issuing an alarm when an alarm notification signal is received.

[0010]

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

(Embodiment 1) FIG. 1 is a functional block diagram of a gas shutoff device according to Embodiment 1 of the present invention. FIG. 2 is a program flow chart of the first embodiment. In FIG. 1, the inspection start input unit 1 may be a start timing for starting the flow rate registration of a gas appliance (for example, a push switch or a reed switch for detecting a magnetic force, or a wired or wireless signal or a communication telegram may be used for the same purpose). When the effect is obtained), the inspection start signal A is output.

When the switching operation section 2 receives the inspection start signal A from the inspection start input section 1, the switching in progress signal H from the flow rate holding section 6 is received.
Check the presence or absence, and if it is not registered, the instrument individual valve 101-
Switching instruction signal B for controlling 103 (a single appliance individual valve may be instructed to open / close, or arbitrary plural or all appliance individual valves may be instructed to open / close simultaneously)
And a registration permission signal D that permits registration of the flow rate.

Upon receiving the switching instruction signal B from the switching operation portion 2, the valve switching portion 3 follows the instruction of the switching instruction signal B and the appliance individual valves 101 to 103 (the main valve built in the gas appliance may be directly operated). A switching signal C for opening and closing (or simultaneously) is output.

The flow rate input unit 4 outputs a flow rate signal E corresponding to the flow rate of the gas passing through the gas passage (for example, the flow rate signal E may be output when a certain gas passes through the gas passage, Flow rate sensor that can measure the instantaneous flow rate in the gas passage <For example, an obstacle is provided in the gas passage to detect the flow rate by the fluctuation cycle of the gas pressure generated around it, or the gas passage of a thermocouple installed in the gas passage Even if the flow rate is detected by grasping it as a resistance value from the heat that is taken away at some time, or by detecting the flow rate from the difference in the propagation time of the sound waves emitted from each by installing sound wave sensors facing the upstream side and the downstream side of the gas passage. You can get the same effect by using〉. When receiving the flow rate signal E from the flow rate input section 4, the flow rate calculation section 5 calculates a flow rate value and outputs a flow rate value signal F.

When the flow rate holding section 6 receives the registration permission signal D from the switching operation section 2, it outputs a registering signal H and receives a flow rate value signal F from the flow rate calculation section 5 so that the flow rate value falls within a predetermined range (eg,
In the case of entering 10 L / h to 100 L / h), the output of the signal H during registration is stopped and a plurality of flow rate values are retained as the flow rate value signal G (only one gas appliance may be used, or the number of gas appliances may be the same). It may be a combination of multiple gas appliances).

The flow rate determination section 7 compares the flow rate value signal F of the flow rate calculation section 5 with the held flow rate value signal G of the flow rate holding section 6 and goes out of a predetermined range (for example, a flow rate that exceeds ± 10% of the held flow rate value signal G). Even if the value signal F is detected, or if the judgment is made by adding the specified flow rate value such as ± 2 L / h to the held flow rate value signal G, the same effect can be obtained. The notification signal J is output.

When the valve drive unit 8 receives the valve drive permission signal I from the flow rate determination unit 7, it outputs a valve drive signal K. When the valve 9 receives the valve drive signal K from the valve drive unit 8, the valve 9 closes the gas passage. When the alarm notification unit 10 receives the alarm notification signal J from the flow rate determination unit 7, the alarm notification unit 10 may display an alarm (for example, display using an LED or LCD, or notify by sound or voice by a buzzer or speaker, or wired or wireless). The same effect can be obtained even if it is notified to the outside).

The operation and action of the gas shutoff device configured as described above will be described below. In FIG. 2, the program flow of the above embodiment is shown in steps S1 to S14. Now, it is assumed that the flow from the start of processing to the end of processing is periodically processed by an interval calendar or the like.

In the switching operation section 2 of the gas shutoff device, the process S1 judges whether or not the registration operation is in progress. If the registration operation is in progress, the process proceeds to step S5, and if the registration operation is not in progress, the process proceeds to step S2.

In the inspection start input section 1, the process S2 may be an instruction to start the inspection (for example, a push switch or a reed switch for detecting a magnetic force, or a wired or wireless signal or a communication telegram to obtain the same effect. If there is an instruction to start the inspection, the process proceeds to step S3, and if there is no instruction to start the inspection, the process proceeds to step S5.

In the flow rate holding unit 6, the process S3 is registered and the process proceeds to the process S4. Process S4 in the valve switching unit 3
Opens and closes the device individual valve (it may instruct a single device individual valve to open or close, or may instruct any plurality or all device individual valves to open and close at the same time), and the process S
Go to 5.

In step S5 of the flow rate input section 4, a flow rate signal corresponding to the flow rate of the gas passing through the gas passage (for example, a flow rate signal E may be output when a certain gas passes through the gas passage, or the gas passage may be output). The same effect can be obtained by using a flow rate sensor capable of measuring the instantaneous flow rate in the above). If there is a flow rate signal, the process proceeds to step S6, and if there is no flow rate signal, the process ends.

In step S6 in the flow rate determination unit 5, the flow rate value based on the flow rate signal is calculated and the process proceeds to step S7. In the flow rate holding unit 6, the process S7 determines whether or not the registration operation is being performed, and if the registration operation is being performed, the process proceeds to the process S8, and if the registration operation is not being performed, the process proceeds to the process S11. Process S8 determines whether the flow rate value is within a predetermined range (for example, 10 L / h to 100 L / h), and if it is within the range, the process proceeds to process S9.
If it is not within the range, the process proceeds to step S11.

In step S9, the flow rate value is held as a plurality of flow rate values (a single gas appliance may be used, the number of gas appliances may be the same, or a combination of a plurality of gas appliances may be used).
Move to 0. The process S10 ends the registration operation and the process S
Go to 11. In the flow rate determination unit 7, the process S11 compares the flow rate value and the held flow rate value and within the predetermined range (for example, even when the flow rate value signal F deviated by ± 10% or more of the held flow rate value signal G is detected, the held flow rate is also determined. ± 2L / for value signal G
Even if a prescribed flow rate value such as h is added to make a determination, the same effect can be obtained), and if it is within the range, the process is ended, and if it is not within the range, the process proceeds to step S12.

In step S12, the valve drive section 8 outputs a valve drive signal and the process proceeds to step S13. In the valve 9, the process S13 closes the gas passage and shifts to the process S14. In the alarm notification unit 10, the process S14 is an alarm notification (for example, L
The same effect can be obtained by displaying using an ED, an LCD or the like, or by notifying by sound or voice with a buzzer or a speaker, and the same effect can be obtained by wire or wireless notification to the outside.

As described above, in the gas shutoff device according to the present embodiment, the individual gas appliances are set to the gas intake ports of all the gas appliances and all the individual valve of the appliances are closed to separate the individual gas appliances from the original cock. Since it is possible to check the pipe leakage between the two, it is possible to eliminate the pipe leakage that was included as the flow rate of the pilot burner in the conventional registration method, further reducing the possibility of gas poisoning due to gas leakage. It becomes possible to further improve the safety.

After registering the flow rate of the pilot burner of all gas appliances, the flow rate of the pilot burner of each gas appliance is not affected by the presence or absence of the individual valve of the appliance. Therefore, remove the individual valve of the appliance attached to the gas appliance. The gas appliance and the original cock can be simply connected directly. As a result, it is only necessary to attach the device individual valve when necessary, and it is not necessary to always install the device individual valve, so it is possible to reuse the device individual valve with another gas shutoff device, and It is possible to eliminate the misfire of gas appliances due to the closure.

(Embodiment 2) FIG. 3 is a functional block diagram of a gas shutoff device according to Embodiment 2 of the present invention. FIG. 4 is a program flow chart of the second embodiment. The same reference numerals as those of the first embodiment have the same structure, and the description thereof will be omitted. Example 1
3 is different from the inspection start signal A from the inspection start input unit 1 in the functional block diagram of FIG.
When it receives, the presence or absence of the valve residual signal L is confirmed, and if there is an uninspected gas appliance remaining, the presence or absence of the registering signal H is confirmed, and if it is not registered, the switching instruction signal B for controlling the appliance individual valve B and the flow rate A registration permission signal D that permits registration is output.

The valve switching detector 12 detects the number of gas appliances to be inspected by the appliance individual valves 101 to 103, and gas appliances that require inspection (once all the appliance individual valves 101 to 103).
After checking, the switching instruction signal B may be counted for the total number of times, or all the device individual valves 101 to 101 may be counted once.
The same effect can be obtained by checking 103 and then checking whether or not there is a leak in the combination of the appliance individual valves 101 to 103 opened and closed by the switching instruction signal B based on the information. In addition, it is also effective to exclude gas appliances that do not need to be inspected from the inspection by providing changeover switches and the like to the individual instrument valves 101 to 103 to indicate whether or not inspection is necessary. Output and automatic switching operation unit 11
When receiving the switching instruction signal B of
Outputs a switching signal for opening and closing 3 in order (may be instructed to open / close to individual device individual valve, or may simultaneously instruct open / close to arbitrary plural or all device individual valves) To do.

The flow rate holding unit 6 is the switching operation unit 1 in the first embodiment.
The operation was performed by receiving the registration permission signal D from, but in the second embodiment, the registration permission signal D is received from the automatic switching operation unit 11.

The operation and action of the gas shutoff device configured as described above will be described below. In FIG. 4, the program flow of the above embodiment is shown in steps S1 to S17. Now, it is assumed that the flow from the start of processing to the end of processing is periodically processed by an interval calendar or the like. The same reference numerals as those of the first embodiment have the same structure, and the description thereof will be omitted.

However, the processing S10 is a processing S after the processing is completed.
We will move to 15. Further, in the first embodiment, the switching operation unit 2 processes the process S1, but in the second embodiment, the automatic switching operation unit 11 processes the process S1, and similarly in the first embodiment, the valve switching unit 3 processes the process S4. However, in the second embodiment, the valve switching detection unit 12 is supposed to process the process S4.

In the automatic switching operation unit 11, the process S15 determines the presence or absence of the valve residual signal from the valve switching detector 12, and if there is a valve residual signal, the process proceeds to the process S16, and if there is no valve residual signal, the process proceeds to the process S11. To do.

In the flow rate holding unit 6, the process S16 is under registration and the process proceeds to the process S17. The process S17 in the valve switching detection unit 12 opens / closes the appliance individual valve (a single appliance individual valve may be instructed to open / close, or an arbitrary plurality or all appliance individual valves may be instructed to open / close simultaneously. May be)
Then, the process proceeds to step S11.

As described above, in the present embodiment, once the inspection is started, the ones that need to be inspected are automatically extracted and automatically switched to improve the efficiency of the work or Leakage can be prevented.

(Third Embodiment) FIG. 5 is a functional block diagram of a gas shutoff device according to a third embodiment of the present invention. FIG. 6 is a program flow chart of the third embodiment. The same reference numerals as those of the first embodiment have the same structure, and the description thereof will be omitted. Example 1
5 is different from that in the functional block diagram of FIG. 5, when the switching operation unit 2 receives the inspection start signal A from the inspection start input unit 1, the switching operation unit 2 confirms the presence or absence of the registration-in-progress signal H from the flow rate holding unit 6, and the registration is in progress. If not, the presence / absence of the plugging instruction signal M of the leaking input unit 13 is checked, and the appliance individual valve for which the plugging is instructed is closed and fixed (for example, when the appliance individual valve 102 is an inspection target, the appliance individual valve 102 is fixed and closed). During the subsequent inspection, the instrument individual valve 102 is not opened, and the same effect can be obtained by arbitrarily designating the instrument individual valve).
And a switching instruction signal B (which may instruct a single appliance individual valve to open and close, or may simultaneously instruct opening and closing to arbitrary plural or all appliance individual valves). A registration permission signal D that permits registration of the flow rate is output.

The leak flow rate determination unit 14 includes the function of the flow rate determination unit 7 of the first embodiment. The flow rate determination unit 7 determines the presence / absence of the registration-in-progress signal H of the flow rate holding unit 6, and if there is the registration-in progress signal H, the flow rate calculation unit 5 is detected.
Of the flow rate value signal F of the flow rate holding unit 6 and the flow rate value signal G of the flow rate holding unit 6 are compared and the flow rate value signal F is out of a predetermined range (for example, 10 L / h to 100 L /
In the case of h), the alarm notification signal J is output and the leak present input unit 13
If there is a plugging instruction signal M, the output of the alarm notification signal J is stopped, and if there is no registering signal H, the flow rate value signal F of the flow rate calculation unit 5 and the flow rate held by the flow rate holding unit 6 are determined. The value signals G are compared and out of a predetermined range (for example, 10 L / h
˜100 L / h), the valve drive permission signal I and the alarm notification signal J are output.

The leaked input section 13 confirms the leak (for example,
A person may confirm the alarm notification by using a push switch or a reed switch that detects magnetic force, may be instructed by a wired or wireless signal or communication telegram, or have the same effect even if the alarm notification is automatically captured. When it is set), the plug closing instruction signal M is output.

In the first embodiment, the valve drive section 8 operates by receiving the valve drive permission signal I from the flow rate determination section 7, but in the third embodiment, the leak flow rate determination section 14 outputs the valve drive permission signal I.
When the warning notification unit 10 receives the warning notification signal J from the flow rate determination unit 7 in the first embodiment, the warning notification unit 10 receives the warning notification signal J from the leakage flow rate determination unit 14 in the second embodiment. .

The operation and action of the gas shutoff device configured as described above will be described below. In FIG. 6, the program flow of the above embodiment is shown in steps S1 to S23. Now, it is assumed that the flow from the start of processing to the end of processing is periodically processed by an interval calendar or the like. The same reference numerals as those of the first embodiment have the same structure, and the description thereof will be omitted. However, steps S15 to S17 are skipped.

In the process S8, if the flow rate value is not within the predetermined range (for example, 10 L / h to 100 L / h), the process S1 is performed.
8, the process S11 compares the flow rate value with the held flow rate value, and even if the flow rate value signal F deviated within a predetermined range (for example, ± 10% or more of the held flow rate value signal G is detected, The same effect can be obtained even if a judgment is made by adding a prescribed flow rate value such as ± 2 L / h to the value signal G).
2, the process S14 proceeds to the process 23 after the process is completed.

In the first embodiment, the processing S11 is performed by the flow rate determination unit 7, but in the second embodiment, the leakage flow rate determination unit 14 performs the processing S11.

In the alarm notification unit 10, the process 18 is an alarm notification (for example, it may be displayed by using an LED or LCD, or may be notified by sound or voice by a buzzer or a speaker, or may be notified by wire or wireless to the outside. The same effect can be obtained), and the process proceeds to step S19.

In the leaked input section 13, the process S19 confirms the leak (for example, a person may confirm the alarm notification by using a push switch or a lead switch for detecting the magnetic force, or a wired or wireless signal or a communication message may be used to instruct. If the warning is automatically taken in, the same effect can be obtained. If a leak can be confirmed, the process proceeds to step S20. If no leak can be confirmed, the process proceeds to step S23.

In the leakage flow rate determination unit 14, the process S20 stops the output of the alarm notification and shifts to the process S21. In the leaked input unit 13, the process S21 instructs the instrument individual valve to be closed and fixed (for example, when the instrument individual valve 102 is an inspection target, the instrument individual valve 102 is closed and fixed, and the instrument individual valve 102 is not opened during the subsequent inspection. Also, the same effect can be obtained by arbitrarily designating the device individual valve) and process S23.
Move to.

In the leak flow rate determining unit 14, the process S22 stops the output of the alarm notification and shifts to the process S23. In step S23 in the switching operation unit 2, the instrument individual valve whose closure is instructed is fixed as the closure and the instrument individual valve (for example, when the instrument individual valve 102 is the inspection target, the instrument individual valve 102).
The instrument individual valve 102 is not opened during the subsequent inspection with the stopper fixed. Further, the same effect can be obtained by arbitrarily designating the device individual valve), and opening / closing of the device individual valves 101 to 103 (instruction of opening / closing for a single device individual valve, or arbitrary plural numbers) Alternatively, all the device individual valves may be instructed to be opened / closed at the same time), and the process ends.

As described above, in this embodiment, when the flow rate value is out of the predetermined range even though the inspection is started, the gas leak other than that consumed by the pilot burner in the gas appliance. (If the flow rate is detected even though the pilot burner is not ignited, there is a leak in the gas appliance, and if it is outside the specified range when the pilot burner is ignited, the pilot burner and gas leak will occur. Can be determined to have been added).

Further, even if the flow rate value is within a predetermined range, when the inspector finds a gas leak or the like, the operator can manually instruct the closure and fixation of the instrument, and both convenience and safety can be achieved. . Furthermore, if only the individual instrument valve attached to the gas instrument for which a leak has been detected is attached after inspection with the valve closed, it is possible to accidentally use an instrument with a gas leak until it is replaced with a new gas instrument. It is possible to improve safety by preventing

(Fourth Embodiment) FIG. 7 is a functional block diagram of a gas shutoff device according to a fourth embodiment of the present invention. FIG. 8 is a program flow chart of the fourth embodiment. The same reference numerals as those of the first embodiment have the same structure, and the description thereof will be omitted.

The difference from the first embodiment is that, in the functional block diagram of FIG. 7, when the switching operation unit 2 receives the inspection start signal A of the inspection start input unit 1, the presence / absence of the registering signal H from the flow rate holding unit 6 is checked. If it is confirmed and is not registered, the tolerance determination unit 16
The presence of the plugging instruction signal M is checked, and the appliance individual valve for which closure is instructed is closed and fixed (for example, when the appliance individual valve 102 is an inspection target, the appliance individual valve 102 is closed and fixed, and the instrument individual valve is subsequently inspected. 102 is not opened, and the same effect can be obtained by arbitrarily designating the instrument individual valve. A switching instruction signal B for controlling the instrument individual valves 101 to 103 (instructing an individual instrument individual valve to open and close). It is also possible to instruct opening / closing simultaneously for arbitrary plural or all device individual valves) and a registration permission signal D for permitting registration of the flow rate.

When the external communication section 15 receives the held flow rate value signal G from the flow rate holding section 6, it retrieves information from the outside (for example, information on the gas appliance under inspection via the setting device 401 on an information network such as the Internet or in public). The same effect can be obtained by connecting to a dedicated gas appliance information center using a telephone line. Of course, information about typical gas appliances may be stored in the setting device in advance). And outputs a leak range signal O (for example, information on an allowable gas leak amount peculiar to the gas appliance or an allowable amount of the gas leak amount due to secular change) from the appliance information.

When the allowance determination section 16 receives the leak range signal O from the external communication section 15, the hold flow rate value signal G from the flow rate holding section 6 is received.
Is obtained and the held flow rate value signal G does not fall within the leak range signal O, the plugging instruction signal M and the alarm notification signal J are output.

The operation and action of the gas shutoff device configured as described above will be described below. In FIG. 8, the program flow of the above embodiment is shown in processing S1 to processing S26. Now, it is assumed that the flow from the start of processing to the end of processing is periodically processed by an interval calendar or the like. The same reference numerals as those of the first embodiment have the same structure, and the description thereof will be omitted. However, steps S15 to S23 are omitted. It is assumed that the process S10 shifts to the process S24 after the process is completed.

In the external communication section 15, the process S24 is performed by an external device (for example, information on the gas appliance under inspection is set by the setting device 401).
The same effect can be obtained by searching through an information network such as the Internet via the Internet or connecting to an information center for a dedicated gas appliance using a public telephone line. Of course, information about a typical gas appliance may be held in the setter in advance) and the appliance information is communicated with the setting device, and the process proceeds to step S25. The process S25 is a leak range signal (for example,
Information regarding the allowable gas leak amount peculiar to the gas appliance and the allowable amount of the gas leak amount due to secular change) is extracted and the process proceeds to step S26.

In the tolerance determining unit 16, the process S26 proceeds to the process S11 if the held flow rate value is within the permitted leak range, and proceeds to the process S14 if it does not fall within the leak range.

As described above, in this embodiment, the gas leak allowable range peculiar to the gas appliance is accurately obtained by utilizing the Internet or the like, and the work to be taken when the gas leak is actually detected is taken. By making it possible to use not only the rule of thumb of a person but also a uniform judgment standard, it becomes easier to match the standard and coping method of the gas industry, and the convenience can be improved.

In addition to facilitating the collection of information such as aging of appliances, it is also possible to judge the degree of damage of gas appliances by feeding back the information, and if the function of ordering replacement parts is added to the installation device, it is possible to use the Internet or the like. If you can place an order directly with a gas appliance maker or obtain inventory information, you can inform the user who is using the gas of the correct repair schedule.

(Fifth Embodiment) FIG. 9 is a functional block diagram of a gas shutoff device according to a fifth embodiment of the present invention. FIG. 10 is a program flow chart of the fifth embodiment. The same reference numerals as those in the first and second embodiments have the same structure, and the description thereof will be omitted.

The difference from the second embodiment is that, in the functional block diagram of FIG. 9, the automatic switching operation unit 11 acquires the valve residual signal L from the valve switching detection unit 12 in the second embodiment, but in the fifth embodiment. Then, the valve remaining signal L is acquired from the valve switching communication unit 17.

The valve switching communication unit 17 detects the number of gas appliances to be inspected by the wireless appliances 601 to 603 each having a built-in individual appliance valve via the wireless device 501 attached to the outside, and if there is a gas appliance that needs inspection. When the valve residual signal L is output and the switching instruction signal B of the automatic switching operation unit 11 is received, a switching communication signal for sequentially opening and closing the appliance individual valve is output.

The operation and action of the gas shutoff device configured as described above will be described below. In FIG. 10, the program flow of the above-described embodiment is shown from processing S1 to processing S27. Now, it is assumed that the flow from the start of processing to the end of processing is periodically processed by an interval calendar or the like. The same reference numerals as those of the first embodiment have the same structure, and the description thereof will be omitted. However, the process 4 and the processes S18 to S26 are omitted. It should be noted that the process S3 shifts to the process S27 after the process is completed.

In step S27 of the valve switching communication unit 17, a radio device 501 having the number of gas appliances to be inspected externally attached is installed.
Wireless devices 601 to 603 having device individual valves built in via
And the process shifts to step S5.

As described above, in the present embodiment, when the gas appliance is inspected, the cable is wireless instead of wired, thereby eliminating unnecessary work for the inspection, thereby shortening the time required for the inspection and improving the operability. It is possible to improve.

[0064]

As is apparent from the above description, the gas shutoff device of the present invention has the following advantages.

According to the first aspect of the invention, the pipes between the original cock and the individual gas appliances are set by setting the individual appliance valves in the gas intake ports of all the gas appliances and closing all the individual appliance valves. Since it is possible to confirm the leakage, it is possible to eliminate the piping leakage that was included in the flow rate of the pilot burner in the conventional registration method, so it is possible to further reduce the possibility of gas poisoning due to gas leakage. The safety can be further improved.
Also, after registering the flow rate of the pilot burner for all gas appliances, the flow rate of the pilot burner for each gas appliance does not depend on the presence or absence of individual valve for the appliance, so remove the individual valve installed on the gas appliance and remove the gas appliance. You can simply connect directly to the former cock. As a result, it is only necessary to attach the device individual valve when necessary, and it is not necessary to always install the device individual valve, so it is possible to reuse the device individual valve with another gas shutoff device, and It is possible to eliminate the misfire of gas appliances due to the closure.

According to the second aspect of the present invention, once the inspection is started, the ones that need to be inspected automatically are extracted and the operation is automatically switched to improve the work efficiency. It is also possible to prevent inspection omissions.

According to the third aspect of the present invention, when the flow rate value is out of the predetermined range even though the inspection is started, the gas is not consumed by the pilot burner in the gas appliance. Gas leak (If the flow rate is detected even if the pilot burner is not ignited, there is a leak in the gas appliance, and if it is outside the specified range when the pilot burner is ignited, it is considered as a pilot burner. It can be determined that there was a summation of gas leaks). Further, even if the flow rate value is within a predetermined range, when an inspector discovers a gas leak or the like, the operator can manually instruct the closure and fixation of the instrument, and both convenience and safety can be achieved. Furthermore, if only the individual instrument valve attached to the gas instrument for which a leak has been detected is attached after inspection with the valve closed, it is possible to accidentally use an instrument with a gas leak until it is replaced with a new gas instrument. By preventing this, there is an advantageous effect that the safety can be improved.

Further, according to the present invention of claim 4, the gas leak allowable range peculiar to the gas appliance is accurately obtained by utilizing the Internet or the like, so that when the gas leak is actually detected. By being able to take measures not only based on the empirical rule of the worker but also based on uniform judgment criteria, it is easier to match the standards and coping methods that are unified in the gas industry, and convenience can be improved.

In addition to facilitating collection of information such as aging of appliances, it is also possible to judge the degree of damage to gas appliances by feeding back the information, and if a function to order replacement parts is added to the installation device, it is possible to use the Internet or the like. If the user can place an order directly with the gas appliance maker or obtain inventory information, it has an advantageous effect that an accurate repair schedule can be notified to the user who is using the gas.

Further, according to the present invention as claimed in claim 5, by making wireless, unnecessary work for inspection can be eliminated, so that time required for inspection can be shortened and operability can be improved. .

Then, it becomes possible to detect the gas leakage after the former cock, which is a conventional problem, and it is possible to further prevent the gas poisoning and the like due to the gas leakage.
By collecting and analyzing information such as secular change, the stored flow rate value can be changed annually in consideration of secular change, and the amount of gas used by the pilot burner can be further improved (allowable gas leakage can be considered, deterioration of the pilot burner nozzle, etc.) ) And a gas leak can be distinguished and a new technology can be acquired.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a gas shutoff device according to a first embodiment of the present invention.

FIG. 2 is a program flowchart of the device.

FIG. 3 is a functional block diagram of a gas shutoff device according to a second embodiment of the present invention.

FIG. 4 is a program flowchart of the device.

FIG. 5 is a functional block diagram of a gas shutoff device according to a third embodiment of the present invention.

FIG. 6 is a program flowchart of the device.

FIG. 7 is a functional block diagram of a gas shutoff device according to a fourth embodiment of the present invention.

FIG. 8 is a program flowchart of the device.

FIG. 9 is a functional block diagram of a gas shutoff device according to a fifth embodiment of the present invention.

FIG. 10 is a program flowchart of the device.

FIG. 11 is a functional block diagram of a conventional gas shutoff device.

[Explanation of symbols]

1 Inspection start input section 2 Switching operation section 3 valve switching unit 4 Flow rate input section 5 Flow rate calculator 6 Flow rate holding unit 7 Flow rate determination unit 8 valve drive 9 valves 10 Alarm notification section 11 Automatic switching operation section 12 valve switching detector 13 Leakage input section 14 Leakage flow rate determination unit 15 External communication section 16 Tolerance judgment section 17 Valve switching communication unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tadanori Shirasawa             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F term (reference) 2F030 CB02 CB03 CC13 CF11                 3K068 AA01 BB20 BB23 DA01 DA14                       DA16

Claims (5)

[Claims] 1. An inspection start input section that outputs an inspection start signal when the start timing for starting the flow rate registration of a gas appliance is detected, and the presence or absence of a signal being registered when the inspection start signal of the inspection start input section is received. However, if not registered, a switching operation unit that outputs a switching instruction signal for controlling the device individual valve and a registration permission signal that permits registration of the flow rate, and the device individual valve when the switching instruction signal of the switching operation unit is received. The valve switching section that outputs a switching signal that opens and closes in sequence, the flow rate input section that outputs a flow rate signal corresponding to the gas flow rate passing through the gas passage, and the flow rate value when the flow rate signal from the flow rate input section is received. When a flow rate calculation unit that calculates and outputs a flow rate value signal and the registration permission signal of the switching operation unit are received, a registration in progress signal is output, the flow rate value signal of the flow rate calculation unit is received, and the flow rate value falls within a predetermined range. Enter in If the flow rate holding unit stops the output of the signal during registration and holds a plurality of flow rate values as holding flow rate value signals, the flow rate value signal of the flow rate calculating unit and the flow rate value signal of the flow rate holding unit are compared. If it is outside the predetermined range, a flow rate determination unit that outputs a valve drive permission signal and an alarm notification signal,
A valve drive unit that outputs a valve drive signal when the valve drive permission signal of the flow rate determination unit is received, a valve that closes the gas passage when the valve drive signal of the valve drive unit is received, and an alarm notification signal of the flow rate determination unit. A gas shutoff device including an alarm notification unit that notifies an alarm when the message is received. 2. An inspection start input section that outputs an inspection start signal when the activation timing for starting the flow rate registration of the gas appliance is detected, and the presence or absence of a valve residual signal is confirmed when the inspection start signal from the inspection start input section is received. , If there is an unexamined gas appliance remaining, check whether there is a signal being registered, and if it is not registered, automatically output a switching instruction signal to control the appliance individual valve and a registration permission signal to permit registration of the flow rate. The switching operation part and the number of gas appliances to be inspected are detected by the appliance individual valve, and if there is a gas appliance requiring inspection, the valve residual signal is output, and when the switching instruction signal of the automatic switching operation part is received, A valve switching detection unit that outputs a switching signal that sequentially opens and closes individual equipment valves, a flow rate input unit that outputs a flow rate signal corresponding to the gas flow rate passing through the gas passage, and a flow rate signal from the flow rate input unit Then the flow rate When a flow rate calculation unit that calculates a value and outputs a flow rate value signal and a registration permission signal of the automatic switching operation unit are received, a registering signal is output and the flow rate value signal of the flow rate calculation unit is received, and the flow rate value is a predetermined value. If it is within the range, the flow rate holding unit that stops outputting the registering signal and holds a plurality of flow rate values as the held flow rate value signals, the flow rate value signal of the flow rate calculation unit and the hold flow rate value signal of the flow rate holding unit If it is out of a predetermined range, a flow rate determination unit that outputs a valve drive permission signal and an alarm notification signal; and a valve drive unit that outputs a valve drive signal when the valve drive permission signal of the flow rate determination unit is received, A gas shutoff device comprising: a valve that closes a gas passage when a valve drive signal of a valve drive unit is received; and an alarm notification unit that issues an alarm when the alarm notification signal of the flow rate determination unit is received. 3. An inspection start input section that outputs an inspection start signal when the activation timing for starting the flow rate registration of the gas appliance is detected, and the presence or absence of a registration-in-progress signal is confirmed when the inspection start signal of the inspection start input section is received. If it is not registered, check for the presence of a plugging instruction signal in the leaked input part, and register the switching instruction signal and flow rate that control the appliance individual valve with the appliance individual valve for which closure is instructed fixedly closed A switching operation unit that outputs a permission signal, a valve switching unit that outputs a switching signal that sequentially opens and closes the appliance individual valve when a switching instruction signal from the switching operation unit is received, and a gas flow rate that passes through the gas passage. Correspondingly, a flow rate input section that outputs a flow rate signal, a flow rate calculation section that calculates a flow rate value when the flow rate signal of the flow rate input section is received, and outputs a flow rate value signal, and a registration permission signal of the switching operation section are received. When the flow rate value signal of the flow rate calculation unit is received and the flow rate value falls within a predetermined range, the output of the registration signal is stopped and the flow rate value is held. As to whether or not there is a signal being registered in the flow rate holding unit and a flow rate holding unit that holds a plurality of flow rate holding units, and if there is a signal being registered, compare the flow rate value signal of the flow rate calculation unit with the hold flow rate value signal of the flow rate holding unit. However, if it is outside the predetermined range, an alarm notification signal is output to determine the presence or absence of the plugging instruction signal in the leaked input section.If there is a plugging instruction signal, the output of the alarm notification signal is stopped and the registered signal is If not, the flow rate value signal of the flow rate calculation section and the held flow rate value signal of the flow rate holding section are compared, and if it is out of a predetermined range, a leak flow rate determination section that outputs a valve drive permission signal and an alarm notification signal, When the valve drive permission signal from the leak flow rate determination unit is received, valve drive Signal, a valve that closes the gas passage when a valve drive signal from the valve drive unit is received, an alarm notification unit that notifies an alarm when the alarm notification signal from the flow rate determination unit is received, and a leak is confirmed. A gas shutoff device comprising the leak-preventing input section that outputs a plugging instruction signal when the above-mentioned situation occurs. 4. An inspection start input section which outputs an inspection start signal when the activation timing for starting the flow rate registration of the gas appliance is detected, and the presence or absence of a signal being registered when the inspection start signal of the inspection start input section is received. However, if it is not registered, the presence / absence of a capping instruction signal of the tolerance determination unit is confirmed, and the switching instruction signal and the flow rate are controlled to control the instrument individual valve by fixing the instrument individual valve that is instructed to be closed. A switching operation unit that outputs a registration permission signal, a valve switching unit that outputs a switching signal that sequentially opens and closes the appliance individual valve when a switching instruction signal from the switching operation unit is received, and a gas flow rate that passes through the gas passage. A flow rate input section for outputting a flow rate signal, a flow rate calculation section for calculating a flow rate value when the flow rate signal of the flow rate input section is received and outputting a flow rate value signal, and a registration permission signal for the switching operation section. Receiving When it receives a signal, it outputs a signal being registered and receives the flow rate value signal of the flow rate calculation unit. If the flow rate value falls within a predetermined range, the output of the signal being registered is stopped and the flow rate value is retained. A plurality of flow rate holding sections that hold a plurality of signals are compared with the flow rate value signal of the flow rate calculating section and the held flow rate value signal of the flow rate holding section, and if they are out of a predetermined range, a valve drive permission signal and an alarm notification signal are output. A flow rate determination unit, a valve drive unit that outputs a valve drive signal when the valve drive permission signal of the flow rate determination unit is received, a valve that closes the gas passage when the valve drive signal of the valve drive unit is received, and the flow rate An alarm notification unit that notifies an alarm when the alarm notification signal of the determination unit is received, and an external communication unit that communicates device information with the outside when receiving a held flow rate value signal of the flow rate holding unit and outputs a leak range signal from the device information. And leakage of the external communication unit When a range signal is received, a gas having a tolerance determination unit that acquires a holding flow rate value signal of the flow rate holding unit and outputs a capping instruction signal and an alarm notification signal when the holding flow rate value signal does not fall within the leak range signal Breaking device. 5. An inspection start input section that outputs an inspection start signal when the start timing for starting the flow rate registration of the gas appliance is detected, and the presence or absence of a valve residual signal is confirmed when the inspection start signal of the inspection start input section is received. , If there is an unexamined gas appliance remaining, check whether there is a signal during registration, and if it is not registered, output a switching instruction signal to control the individual valve of the appliance and a registration permission signal to permit flow rate registration. Section and the number of gas appliances to be inspected are detected by a wireless appliance with a built-in appliance individual valve, and if there is a gas appliance that requires inspection, the valve residual signal is output and the switching instruction signal of the automatic switching operation unit is output. Upon reception, a valve switching communication unit that outputs a switching communication signal that sequentially opens and closes the appliance individual valve, a flow rate input unit that outputs a flow rate signal corresponding to the gas flow rate passing through the gas passage, and a flow rate input unit Flow rate signal Receiving a flow rate value signal from the flow rate calculation section, a flow rate calculation section that calculates a flow rate value when receiving a signal and outputs a flow rate value signal, and a registration permission signal from the automatic switching operation section is received, and a flow rate value signal from the flow rate calculation section is received. When the flow rate value falls within a predetermined range, the flow rate holding unit that stops outputting the signal being registered and holds a plurality of flow rate values as flow rate value signals, the flow rate value signal of the flow rate calculation unit, and the flow rate A flow rate determination unit that compares the held flow rate value signal of the holding unit and outputs a valve drive permission signal and an alarm notification signal if it is outside a predetermined range, and a valve drive signal when the valve drive permission signal of the flow rate determination unit is received. A gas having a valve drive unit that outputs a valve, a valve that closes the gas passage when the valve drive signal of the valve drive unit is received, and an alarm notification unit that issues an alarm when the alarm notification signal of the flow rate determination unit is received. Breaking device.