JP2009024961A - Gas shut-off device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect the disconnection of a shut-off means and a failure in a driving circuit by periodically confirming operation even a during normal use where the shut-off of gas does not occur. <P>SOLUTION: In the non-operating state of the shut-off means, periodically signals for turning on and off a first drive control means 6, a second drive control means 7 and a forced stop means 12 are combined and outputted, and at outputting the respective combinations, inputs from a first detection means 8, a second detection means 9, a third detection means 10 and a fourth detection means 11 are always monitored to detect the failure. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gas shut-off device that promptly detects a failure of a shut-off device and gives notification.

  Conventionally, this type of gas shut-off device performs notification as a shut-off abnormality when there is a flow rate after shut-off (see, for example, Patent Document 1).

FIG. 13 shows a conventional gas cutoff device described in the publication. As shown in FIG. 13, the blocking means 3 for supplying and blocking gas, the first driving means 4 and the second driving means 5 for driving the blocking means 3, and the first drive control for controlling the first driving means 4. It comprises means 6, second drive control means 7 for controlling the second drive means, and control means 2. In the figure, 13 is a flow rate detecting means for detecting the flow rate, 14 is a display means for displaying various information, 15 is a communication means for communicating information such as abnormality to the operator, and 16 is an alarm for outputting abnormality etc. to an alarm device. Output means.
Japanese Patent Laid-Open No. 10-030815

  However, in the configuration of the conventional example, even if a failure such as a disconnection occurs after the installation of the gas shut-off device, it cannot normally be detected. After that, there is a problem that when there is a flow rate, a failure can be found as a shut-off abnormality, and even if the shut-off is necessary, it may be in a dangerous state.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a gas shut-off device configured to detect a failure by regularly checking even during normal use where no shut-off occurs. .

  In order to solve the above-mentioned conventional problems, a gas shut-off device according to the present invention includes a first drive control means, a second drive control means, and a first drive control means for controlling a first drive means and a second drive means for driving the shut-off means, respectively. Control means for controlling the first drive control means and the second drive control means; forcible stop means for forcibly stopping a part of the operations of the first drive control means and the second drive control means by an output from the control means; And a first detecting means and a second detecting means for detecting the potentials at both ends of the first driving means, and a third detecting means and a fourth detecting means for detecting the potentials at both ends of the second driving means, respectively. The means outputs a combination of signals for turning on / off the first drive control means, the second drive control means, and the forced stop means periodically when the shut-off means is not in operation or at the start of energization. Combining Sometimes, the first detection means, the second detection means, the third detection means, and the fourth detection means detect a failure. Besides the periodic confirmation, the first drive control means and the second drive control means And a configuration for detecting a failure by constantly monitoring inputs from the first detection means, the second detection means, the third detection means, and the fourth detection means when a signal for turning off the forced stop means is output. It is what.

  Thereby, even when the shut-off means is not operating before the shut-off event occurs, safety can be improved by detecting a failure.

  Periodically when the shut-off means is not operating, the first drive control means, the second drive control means, and the signal for turning on / off the forced stop means are output in combination, and at each combination output, the first detection means, the second detection By constantly monitoring the inputs from the means, the third detection means, and the fourth detection means, it is possible to detect a disconnection of the cutoff means and a failure of the drive circuit periodically even when the cutoff means is not operating. Therefore, it is possible to speed up the response to failure such as replacement, and to improve safety.

  According to a first aspect of the present invention, there is provided a blocking means for supplying and blocking a gas, a first driving means and a second driving means for driving the blocking means, a first drive control means for controlling the first driving means, and the first 2 a second drive control means for controlling the drive means, a control means for controlling the first drive control means and the second drive control means, and the first drive control means and the second by the output from the control means. Forced stop means for forcibly stopping a part of the operation of the drive control means, first detection means and second detection means for detecting potentials at both ends of the first drive means, and both ends of the second drive means The third detection means and the fourth detection means for detecting the respective potentials, the flow rate detection means for detecting the flow rate, the display means for displaying various information by the output from the control means, and the abnormality etc. are output to the alarm device. Alarm output means and information such as abnormalities Communication means for communicating with the operator, and the control means turns on / off the first drive control means, the second drive control means, and the forced stop means periodically when the shut-off means is not in operation. The signals to be turned off are output in combination, and at the time of each combination output, the first drive means, the second detection means, the second detection means, the third detection means, and the input from the fourth detection means 2 is configured to detect disconnection of the drive means and failure of the first drive control means and the second drive control means.

  As a result, even when the shut-off means is not in operation, disconnection of the shut-off means and a failure of the drive circuit can be detected periodically, and response to faults such as replacement can be accelerated and safety can be improved. Can do.

  In particular, the second invention outputs a signal for turning off the first drive control means, the second drive control means, and the forced stop means when the shut-off means is not in operation. In addition, by constantly monitoring inputs from the first detection means, the second detection means, the third detection means, and the fourth detection means, the first drive control means and the second drive control means It is configured to detect a failure.

  As a result, the failure of the drive circuit can be detected, and the response to the failure such as replacement can be accelerated, and the safety can be improved.

  In particular, the third invention outputs the control means of the first invention in combination with a signal for turning on / off the first drive control means, the second drive control means, and the forced stop means at the start of energization. And at the time of each combination output, the first drive means, the disconnection of the second drive means, and the input from the first detection means, the second detection means, the third detection means, and the fourth detection means, and A failure of the first drive control means and the second drive control means is detected.

  As a result, it is possible to immediately detect forgetting of wiring at the time of assembly or repair.

  According to a fourth aspect of the invention, in particular, the control means of the first aspect of the present invention is configured such that when the blocking means is in operation, inputs from the first detection means, the second detection means, the third detection means, and the fourth detection means By monitoring the above, the disconnection of the first drive means and the second drive means and the failure of the first drive control means and the second drive control means are detected.

  Thereby, even if the interruption | blocking means is at the time of operation | movement, it can be confirmed whether it is operate | moving correctly, and safety | security can be improved.

  According to a fifth aspect of the invention, in particular, the control means of the first aspect of the invention is characterized in that the first drive is performed by monitoring inputs from the first detection means, the second detection means, the third detection means, and the fourth detection means. Means, the disconnection of the second drive means, or the failure of the first drive control means and the second drive control means is output to the display means, an abnormality is displayed, and the alarm output means In addition, it is configured to output periodically to notify the user of the abnormality repeatedly and to output to the communication means to notify the operator.

  Thus, the user can be surely notified of the failure, and the operator can be promptly dealt with, thereby improving safety.

  A sixth invention is a program for causing a computer to function as all or part of the gas shut-off device according to any one of the first to fifth inventions. And since it is a program, at least one part of the program of this invention is easily realizable using a general purpose computer or a server. Also, program distribution and installation can be simplified by recording on a recording medium or distributing a program using a communication line.

  Since the present invention can achieve the object of the present invention by making the main part of the first to fifth inventions into an embodiment, details of the embodiment corresponding to each claim will be described below with reference to the drawings. The description will be given with reference to the best mode for carrying out the present invention. Note that the present invention is not limited to the present embodiment. Further, in the description of each embodiment, the same configuration and the same function and effect are given the same reference numerals, and redundant description will not be given.

(Embodiment 1)
1 is a block diagram of a gas shut-off device according to Embodiment 1 of the present invention, FIG. 2 is a flowchart showing a failure detection operation of the gas shut-off device, and FIG. 3 is a flowchart showing an abnormality detection process of the gas shut-off device; FIG. 4 is a logical value table when the gas shut-off device is normal, and FIG. 5 is a timing chart for detecting a failure of the gas shut-off device.

In FIG. 1, the flow rate detection means 13 of the gas cutoff device 1 detects the gas flow rate and outputs it to the control means 2. The display unit 14 displays the meter reading value and the operation state based on the output from the control unit 2. The communication unit 15 transmits to the operator by the output from the control unit 2, receives communication from the operator, and outputs it to the control unit 2. The alarm device output means 16 outputs a signal to an alarm device connected to the outside by an output from the control means 2 when an abnormality or the like occurs. The control means 2 comprising a microcomputer and its peripheral circuits stores a program for executing the control flow of steps (hereinafter referred to as S) 1 to S12 shown in FIG. 3, and includes a first drive control means 6 and a second drive. An output is given to the control means 7, the first drive means 4 and the second drive means 5 are controlled, respectively, and the cutoff means 3 for supplying and shutting off the gas is operated. The first detection means 8 and the second detection means 9 detect the potentials at both ends of the first drive means and output them to the control means 2. The third detection means 10 and the fourth detection means 11 detect the potentials at both ends of the second drive means, respectively, and output them to the control means 2. The first drive control means 6 includes a first drive control means (a) 17, a first drive control means (b) 18, a first drive control means (c) 19, and a first drive control means (d) 20. The first drive control means (a) 17 and the first drive control means (b) 18 are simultaneously controlled by the output from the control means 2. Similarly, the first drive control means ( c) 19 and the first drive control means (d) 20 are simultaneously controlled. The second drive control means 7 comprises a second drive control means (a) 21, a second drive control means (b) 22, a second drive control means (c) 23, and a second drive control means (d) 24. The second drive control means (a) 21 and the second drive control means (b) 22 are simultaneously controlled by the output from the control means 2. Similarly, the second drive control means ( c) 23 and the second drive control means (d) 24 are controlled simultaneously. The forced stop means 12 is output from the control means 2 by the first drive control means (b) 18, the first drive control means (d) 20, the second drive control means (b) 22, and the second drive control means (d ) 24 is forcibly stopped.

  In FIG. 2, the control means 2 determines whether or not the blocking means 3 is stopped (S1). If the blocking means 3 is stopped, it determines whether or not the check flag is 1 (S2). If not 1, the process proceeds to S10. If the check flag is 1, abnormality detection processing is executed (S3). In the abnormality detection process executed in S3, as shown in FIGS. 3 and 5, the drive output A for controlling the first drive control means (a) 17 and the first drive means (b) 18 is turned ON (S13). The first input output from the first detection means 8, the second input output from the second detection means 9, the third input output from the third detection means 10, the first output output from the fourth detection means 11 Four inputs are taken in and the result is stored in the buffer A1 (S14). In S15, the forced stop output for controlling the forced stop means 12 is turned ON. In S16, the first input, the second input, the third input, and the fourth input are fetched and stored in the buffer A2. In S17, the drive output A is turned OFF and the forced stop output is turned OFF. In S18, the drive output B for controlling the first drive control means (c) 19 and the first drive means (d) 20 is turned on, the first input, the second input, the third input and the fourth input are taken in, and the result is obtained. The data is stored in the buffer B1 (S19). In S20, the forced stop output for controlling the forced stop means 12 is turned ON. In S21, the first input, the second input, the third input, and the fourth input are fetched and stored in the buffer B2. In S22, the drive output B is turned OFF and the forced stop output is turned OFF. In S23, the drive output C for controlling the second drive control means (a) 21 and the second drive means (b) 22 is turned on, the first input, the second input, the third input and the fourth input are taken in, and the result is obtained. Store in the buffer C1 (S24). In S25, the forced stop output for controlling the forced stop means 12 is turned ON. In S26, the first input, the second input, the third input, and the fourth input are fetched and stored in the buffer C2. In S27, the drive output C is turned off and the forced stop output is turned off. In S28, the drive output D for controlling the second drive control means (c) 23 and the second drive means (d) 24 is turned on, the first input, the second input, the third input and the fourth input are taken in, and the result is obtained. Store in the buffer D1 (S29). In S30, the forced stop output for controlling the forced stop means 12 is turned ON. In S31, the first input, the second input, the third input, and the fourth input are fetched and stored in the buffer D2. In S32, the drive output D is turned OFF and the forced stop output is turned OFF. In S33, it is determined whether the contents of the buffer A1, the buffer A2, the buffer B1, the buffer B2, the buffer C1, the buffer C2, the buffer D1, and the buffer D2 are all normal. (The logical value table when the buffer contents are normal is shown in FIG. 4.) If any one is not normal in S33, the process proceeds to S35, and if all are normal, the abnormality flag is set to 0 (S34). In S35, the abnormality flag is set to 1. After executing the abnormality detection process, the process returns to S4 in FIG. 2, and in S4, it is determined whether the abnormality flag is 0. If not, the process proceeds to S7. If the abnormality flag is 0, the check flag is set to 0 (S5), and the NG flag A is set to 0 (S6). In S7, it is determined whether or not the NG flag A is 1. If it is not 1, the process proceeds to S9, the NG flag A is set to 1, and the process is exited. If the NG flag A is 1 in S7, the abnormality is determined (S8), and the process is exited. In S10, it is determined whether it is the check timing. If it is the check timing, the check flag is set to 1 (S11), the NG flag A is set to 0 in S12, and the process is exited.

  As described above, in this embodiment, even when the shut-off means is not operating, it is possible to periodically detect the disconnection of the shut-off means and the failure of the drive circuit, and speed up the response to faults such as replacement. Can increase safety.

(Embodiment 2)
FIG. 6 is a flowchart showing the operation of the gas cutoff device according to Embodiment 2 of the present invention.
FIG. 7 is a logical value table when the gas cutoff device is normal. The block diagram of the gas shut-off device is the same as that of FIG. 1, except that the control unit 2 shown in FIG. That is, the control means 2 stores a program for executing the control flow from S36 to S43 shown in FIG.

  In FIG. 6, the control means 2 determines whether or not the blocking means 3 is stopped (S36). If the blocking means 3 is stopped, it is determined whether or not the check flag is 0 (S37) and is 0. In this case, the first input output from the first detection means 8 in S38, the second input output from the second detection means 9, the third input output from the third detection means 10, and the fourth detection means 11 The fourth input to be output is taken in and the result is stored in the buffer E. In S39, it is determined whether or not the contents of the buffer E are all normal. (The logical value table when the buffer contents are normal is shown in FIG. 7.) If the contents of the buffer E are different from the normal contents in S39, the process proceeds to S41. If all the contents of the buffer E are normal, the NG flag B is set to 0 (S40) and the process is exited. In S41, it is determined whether or not the NG flag B is 1. If it is not 1, the process proceeds to S43, the NG flag B is set to 1, and the process is exited. If the NG flag B is 1 in S41, the abnormality is determined (S8), and the process is exited.

  As described above, according to the present embodiment, it is possible to detect a failure in the drive circuit, to speed up the response to a failure such as replacement, and to improve safety.

(Embodiment 3)
FIG. 8 is a flowchart showing the operation of the gas cutoff device according to Embodiment 3 of the present invention. The block diagram of the gas shut-off device is the same as that of FIG. 1, except that the control unit 2 shown in FIG. That is, the control means 2 stores a program for executing the control flow from S44 to S49 shown in FIG.

  In FIG. 8, the control means 2 initializes each item such as a port and a RAM when energization is started (S44), and executes an abnormality detection process in S45. The abnormality detection process is shown in FIG. 3, and the description thereof is omitted because the contents have been described above. After executing the abnormality detection process in S45, it is determined whether or not the abnormality flag is 1 (S46). If the abnormality flag is 1, the abnormality detection process is executed in S47. If the abnormality flag is 1 in S48, the abnormality is confirmed (S49) and the process is exited.

  As described above, in this embodiment, it is possible to immediately detect forgetting of wiring at the time of assembly or repair.

(Embodiment 4)
9 is a flowchart showing the operation of the gas shut-off device according to Embodiment 4 of the present invention, FIG. 10 is a logical value table when the gas shut-off device is normal, and FIG. 11 is a timing chart showing the operation of the gas shut-off device. is there. The block diagram of the gas shut-off device is the same as that of FIG. 1, except that the control unit 2 shown in FIG. That is, the control means 2 stores a program for executing the control flow from S50 to S64 shown in FIG.

In FIG. 9, the control means 2 determines whether or not the shut-off means 3 is operating (S50). If not, the control means 2 proceeds to S58, sets the NG flag C to 0, and exits the process. When the shut-off means 3 is operating in S50, as shown in FIG. 11, the drive output A for controlling the first drive control means (a) 17 and the first drive means (b) 18 is turned ON, and the second drive control means. It is determined whether the drive output C for controlling (a) 21 and the second drive means (b) 22 is ON (hereinafter, the output pattern is assumed to be 1) (S51). If there is, the first input output from the first detection means 8 in S52, the second input output from the second detection means 9, the third input output from the third detection means 10, the fourth detection means 11 Is taken in, the result is stored in the buffer F, and the process proceeds to S59. If the output pattern is not 1 in S51, the drive output B for controlling the first drive control means (c) 19 and the first drive means (d) 20 is turned ON, and the second drive control means (a) 21 and the second drive are controlled. It is determined whether or not the drive output C for controlling the means (b) 22 is ON (hereinafter, the output pattern is assumed to be 2) (S53). The input, the second input, the third input, and the fourth input are taken in, the result is stored in the buffer G, and the process proceeds to S59. If the output pattern is not 2 in S53, the drive output B for controlling the first drive control means (c) 19 and the first drive means (d) 20 is turned ON, the second drive control means (c) 23 and the second drive are controlled. It is determined whether or not the drive output D for controlling the means (d) 24 is turned on (hereinafter, the output pattern is in the state 3) (S55). If the output pattern is 3, the first in S56 The input, the second input, the third input, and the fourth input are fetched, the result is stored in the buffer H, and the process proceeds to S59. If the output pattern is not 3 in S55, that is, the drive output A for controlling the first drive control means (a) 17 and the first drive means (b) 18 is turned ON, the second drive control means (c) 23 and the second drive. The first input, the second input, the third input and the fourth input are taken in with the drive output D for controlling the means (d) 24 turned on (hereinafter, the output pattern is assumed to be 4), and the result is obtained. Store in buffer I and proceed to S59. In S59, it is determined whether the output pattern is 4. If the output pattern is 4, it is determined in S60 whether the contents of the buffer F, buffer G, buffer H, and buffer I are all normal. (Note that FIG. 10 shows a logical value table when the buffer contents are normal). If any one is not normal in S60, the process proceeds to S62, and if all are normal, the NG flag C is set to 0 (S61). In S62, it is determined whether or not the NG flag C is 1. If it is not 1, the process proceeds to S64, the NG flag C is set to 1, and the process is exited. If the NG flag C is 1 in S62, the abnormality is determined (S63), and the process is exited. In S58, the NG flag C is set to 0 and the process is exited.

  As described above, in the present embodiment, it is possible to confirm whether or not the blocking means is operating correctly even when it is operating, and safety can be improved.

(Embodiment 5)
FIG. 12 is a flowchart showing the operation of the gas cutoff device according to Embodiment 5 of the present invention. The block diagram of the gas shut-off device is the same as that of FIG. 1, except that the control unit 2 shown in FIG. That is, the control means 2 stores a program for executing the control flow from S65 to S73 shown in FIG.

  In FIG. 12, the control means 2 determines whether or not the abnormality is confirmed (S65). If the abnormality is confirmed, it is determined whether or not the notification flag is 0 in S66, and if not, the process proceeds to S72. If the notification flag is 0 in S66, it is output to the display means 14 in S67, and the abnormal display is started. In S68, the data is output to the communication means 15, and communication is started to notify the operator of the abnormality confirmation. In S69, in order to inform the user that an abnormality has occurred, the alarm is output to the alarm output means 16 and the alarm output is turned ON. In S70, the notification flag is set to 1, and in S71, a predetermined value is stored in the re-notification counter. In S72, the re-notification counter is counted down. In S73, it is determined whether or not the re-notification counter is 0. If it is 0, the process proceeds to S69 and the alarm device output is turned ON again.

  As described above, in the present embodiment, it is possible to reliably notify the user of the failure by repeatedly performing the alarm, and it is possible to take an immediate response to the operator, thereby improving safety. be able to.

  In each of the above embodiments, the control flow is executed by causing the microcomputer to function with the program stored in the control means, but it is also possible to execute it with hardware instead of the program.

  As described above, the gas shut-off device according to the present invention can detect a failure by stopping a part of the function by a forced stop output. Applicable.

The block diagram of the ventilating fan interlocking gas cutoff device in Embodiment 1-5 of this invention The flowchart which shows the failure detection operation | movement of the gas cutoff device in Embodiment 1 of this invention. The flowchart which shows the abnormality detection process of the gas cutoff device in Embodiment 1 of this invention The figure showing the logical value at the time of the normal of the gas cutoff device in Embodiment 1 of this invention Timing chart for detecting failure of gas shutoff device in embodiment 1 of the present invention The flowchart which shows operation | movement of the gas cutoff device in Embodiment 2 of this invention. The figure showing the logical value at the time of the normal of the gas cutoff device in Embodiment 2 of this invention The flowchart which shows operation | movement of the gas cutoff device in Embodiment 3 of this invention. The flowchart which shows operation | movement of the gas cutoff device in Embodiment 4 of this invention. The figure showing the logical value at the time of the normal of the gas cutoff device in Embodiment 4 of this invention Timing chart showing the operation of the gas cutoff device according to Embodiment 4 of the present invention. The flowchart which shows operation | movement of the gas cutoff device in Embodiment 5 of this invention. Block diagram of a conventional ventilation fan interlocking gas shutoff device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas shut-off device 2 Control means 3 Shut-off means 4 1st drive means 5 2nd drive means 6 1st drive control means 7 2nd drive control means 8 1st detection means 9 2nd detection means 10 3rd detection means 11 4th Detection means 12 Forced stop means 13 Flow rate detection means 14 Display means 15 Communication means 16 Alarm output means 17 First drive control means (a)
18 First drive control means (b)
19 First drive control means (c)
20 First drive control means (d)
21 Second drive control means (a)
22 Second drive control means (b)
23 Second drive control means (c)
24 Second drive control means (d)

Claims (6)

Control means for controlling the first drive means, the first drive means for controlling the first drive means, the first drive means and the second drive means for driving the shut-off means, the shut-off means for supplying and shutting off the gas Control means for controlling the second drive control means, the first drive control means, and the second drive control means, and a part of the first drive control means and the second drive control means by the output from the control means A forced stop means for forcibly stopping the operation, a first detection means and a second detection means for detecting potentials at both ends of the first drive means, and a potential at both ends of the second drive means, respectively. Third detection means and fourth detection means, flow rate detection means for detecting a flow rate, display means for displaying various information by output from the control means, alarm device output means for outputting an abnormality or the like to the alarm device, Information on abnormalities etc. is sent to businesses. And a communication means for combining the signals for turning ON / OFF the first drive control means, the second drive control means, and the forced stop means periodically when the shut-off means is not in operation. And the first drive means and the second drive means are disconnected by the inputs from the first detection means, the second detection means, the third detection means, and the fourth detection means at the time of each combination output. And a failure of the first drive control means and the second drive control means is detected. The control means outputs a signal for turning off the first drive control means, the second drive control means, and the forced stop means when the shut-off means is not in operation, and the first detection means, the second detection The failure of the first drive control means and the second drive control means is detected by constantly monitoring the input from the means, the third detection means, and the fourth detection means. The gas shut-off device according to 1. The control means outputs a combination of signals for turning ON / OFF the first drive control means, the second drive control means, and the forced stop means at the start of energization, and at the time of each combination output, the first detection means, The first drive means, the disconnection of the second drive means, the first drive control means, and the second drive control means in response to inputs from the second detection means, the third detection means, and the fourth detection means. 3. The ventilating fan interlocking gas shutoff device according to claim 1 or 2, wherein a malfunction of the exhaust gas is detected. The control means monitors the input from the first detection means, the second detection means, the third detection means, and the fourth detection means when the shut-off means is in operation, so that the first drive means, The disconnection of the second drive means, and the failure of the first drive control means and the second drive control means are detected, The exhaust fan interlocking gas according to any one of claims 1 to 3, Shut-off device. The control means monitors the input from the first detection means, the second detection means, the third detection means, and the fourth detection means, thereby disconnecting the first drive means, the second drive means, or the When a failure of the first drive control means and the second drive control means is detected, the error is output to the display means, an abnormality is displayed, and the alarm output means is periodically output to the user to repeat the abnormality. The ventilator-linked gas shut-off device according to any one of claims 1 to 4, wherein the ventilator fan-linked gas shut-off device according to any one of claims 1 to 4, wherein the ventilator is output to the communication means to notify the operator. A program that causes a computer to function as all or part of the ventilation fan interlocking gas cutoff device according to any one of claims 1 to 5.