JP2006242442A - Gas shutoff device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent closure of a gas passage by erroneous operation, by eliminating useless waiting time caused by earthquake sensing input in installation. <P>SOLUTION: This gas shutoff device has a flow rate value calculating part 2 for calculating a flow rate value on the basis of output of a flow speed detecting part 1, a return input part 3 for opening the gas passage, an earthquake sensing input part 4 for detecting an earthquake, a return determining part 5 for outputting a shutoff request signal when the flow rate value of the flow rate value calculating part 2 exceeds a specified value or there is an earthquake sensing signal of the earthquake sensing input part 4 when receiving an opening signal of the return input part 3, a valve driving part 6 for closing a valve 7 when receiving the shutoff request signal of this return determining part 5, an earthquake sensing display part 8 for displaying the operation content of the earthquake sensing input part 4 when receiving the earthquake sensing signal, and a battery as a power source. Operability is improved by eliminating the useless waiting time of an installer by displaying the existence of the earthquake sensing signal D by the earthquake sensing display part 8, and consumption of the battery can also be reduced by eliminating the closure of the gas passage by the erroneous operation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an input of a seismic signal generated when a gas shut-off device is installed.

Conventionally, as shown in FIG. 7, this type of gas shut-off device includes a flow rate detection unit 51 that outputs a flow rate signal a corresponding to the gas flow rate passing through the gas passage, and the flow rate signal of the flow rate detection unit 51. a flow rate value calculation unit 52 that calculates and outputs a flow rate value b based on a, a return input unit 53 that outputs an opening signal c when receiving an operation for opening the gas passage, and an earthquake detection and seismic response When the seismic input unit 54 that outputs the signal d and the opening signal c of the return input unit 53 are received, the flow rate value b of the flow rate calculation unit 52 exceeds a specified value within a predetermined period or within a predetermined period. If there is a seismic signal d from the seismic input unit 54, a return determination unit 55 that outputs a cutoff request signal e and a valve that outputs a cutoff valve drive signal f when the cutoff request signal e from the return determination unit 55 is received. The drive unit 56 and the shut-off valve drive signal f of the valve drive unit 56 Receiving the closing valve, a valve 57 for plugging the gas passage, and a battery as the power source (e.g., see Patent Document 1).
JP 11-183228 A

  As is well known, there are two types of gas shut-off device installations, the upper base method in which the base is positioned at the upper position as shown in FIG. 8A and the lower base method in which the base is positioned at the lower position as shown in (b). It is.

  When the gas shut-off device is transported to the site or temporarily placed at the site, the seismic device remains in the state after familiarization as shown in Fig. 9 (c). Even if the judgment is carried out, it is considered that no seismic signal is input from the seismic device.

  On the other hand, in the case of the lower cap system as shown in FIG. 8B, it is conceivable that the gas shut-off device is laid down during transportation or temporary placement at the site for the purpose of protecting the cap. In particular, at the time of temporary placement, there is an increased possibility of laying down in order to prevent stability and adhesion of dust to the base portion.

  By the way, the seismic device 58 is assumed to be installed with the gas shut-off device tilted, and has a double structure of an outer case 59 and an inner case 60 as shown in FIG. The case 60 can be operated in a vertical direction. A buffer (oil) 61 is provided in the gap between the outer case 59 and the inner case 60 in order to detect vibration. The buffer 61 is controlled in a certain viscosity, but the viscosity changes depending on the temperature. In particular, the viscosity increases several times at low temperatures.

  For this reason, even after being laid down as shown in FIG. 9 (a), the inner case 60 outputs an inclination seismic signal (for example, the iron ball 64 passes between the electrodes 62 and 63) just after the upright position in FIG. 9 (b). It is necessary to wait for several minutes because the seismic signal cannot be monitored from the outside.

  If a sufficient waiting time that is considered to have reached the state of FIG. 9C is not taken, the gas passage is reclosed by the seismic signal. That is, the efficiency of installation work of the gas shut-off device by re-closing the gas passage is deteriorated, or the gas shut-off device is driven by the battery, so that the battery is wasted.

  The present invention solves the above-described conventional problems, and improves operability by eliminating useless waiting time, and can eliminate battery re-plugging by a seismic signal and prevent battery consumption. An object of the present invention is to provide a gas cutoff device.

  In order to solve the conventional problems, the gas shutoff device of the present invention is configured such that the seismic display unit displays the presence or absence of a seismic signal output from the seismic input unit.

  This makes it possible for an operator who has installed a gas shut-off device to check the presence or absence of a seismic signal, thereby improving operability while eliminating unnecessary waiting time in anticipation of the absence of the seismic signal. It is possible to prevent the battery from being exhausted by eliminating reclosing of the gas passage due to the seismic signal.

  The gas shut-off device of the present invention enables an operator to determine the presence or absence of a seismic signal, thereby improving workability and preventing wasteful battery consumption.

  A first aspect of the invention is a flow rate detection unit that outputs a flow rate signal corresponding to a gas flow rate passing through the gas passage, and a flow rate value calculation unit that calculates and outputs a flow rate value when receiving the signal of the flow rate detection unit. A return input unit that outputs an opening signal when receiving an operation for opening the gas passage, an earthquake input unit that detects an earthquake and outputs an earthquake signal, and the opening signal of the return input unit If the flow rate value of the flow rate value calculation unit exceeds a specified value within a predetermined period or if there is the seismic signal of the seismic input unit within a predetermined period, a return determination unit that outputs a shut-off request signal; A valve drive unit that outputs a shut-off valve drive signal when receiving the shut-off request signal of the return determination unit; a valve that closes a gas passage when the shut-off valve drive signal of the valve drive unit is received; and the seismic input When the seismic signal of the part is received, the seismic input part By providing a seismic display unit that displays the contents of the operation and a battery as a power source, the operator can confirm the presence or absence of the seismic signal by means of the seismic display unit. As a result, it is possible to improve the operability by eliminating a wasteful waiting time in anticipation of the loss of the battery, and it is possible to prevent the battery from being exhausted by eliminating reclosing of the gas passage due to the seismic signal.

  In particular, in the second invention, in the first invention, when the seismic signal of the seismic input unit is received, if the seismic signal is input for a predetermined time or more, the seismic signal is output through, and the seismic signal is output for a predetermined time or longer. When the seismic signal is no longer input, the display instruction unit which stops the through output of the seismic signal, in particular, the seismic display unit of the first invention, the seismic signal from the seismic input unit. The presence / absence display of the seismic signal is prevented from being sporadically output by the seismic display unit that displays the seismic signal through the display instruction unit instead of receiving the seismic signal. Thus, the operator can surely recognize the presence or absence of the seismic signal.

  According to a third aspect of the invention, in particular, in the first aspect of the invention, a determination stop input unit that outputs a determination stop signal when receiving an operation input instructing the validity / invalidity of the seismic signal, and in particular, the return determination unit of the first invention When the opening signal of the return input unit is received, the flow rate value of the flow rate calculation unit exceeds a specified value within a predetermined period, or if there is no determination stop signal of the determination stop input unit, the vibration is detected within the predetermined period. If there is a seismic signal of the input unit, the return determination unit that outputs a shut-off request signal, even if the seismic display unit recognizes that the seismic signal is output, the return determination unit at the discretion of the operator By stopping the determination of the seismic signal at, the waiting time until the seismic signal is settled can be eliminated.

  According to a fourth aspect of the invention, in particular, in the first aspect of the invention, a determination stop communication unit that outputs a determination stop signal when receiving a communication message instructing the validity / invalidity of the seismic signal, and in particular, the return determination unit of the first invention When the opening signal of the return input unit is received, the flow rate value of the flow rate calculation unit exceeds a specified value within a predetermined period, or when there is no determination stop signal of the determination stop communication unit, the vibration is detected within the predetermined period. If there is a seismic signal of the input unit, the return determination unit that outputs a shut-off request signal, even if the seismic display unit recognizes that the seismic signal is output, the return determination unit at the discretion of the operator By stopping the determination of the seismic signal at, the waiting time until the seismic signal is settled can be eliminated.

  When the opening signal of the return input unit is received, the fifth invention receives the seismic signal of the seismic input unit and outputs the opening signal through if there is no seismic signal, and if there is the seismic signal Instead of receiving the opening signal of the return input unit, the return start instruction unit that outputs the opening signal after delaying until the seismic signal disappears, and particularly the return determination unit of the first invention. When the opening signal output from the return start instructing unit is received, the flow rate value of the flow rate calculation unit exceeds a specified value within a predetermined period, or the seismic signal of the seismic input unit is present within a predetermined period. For example, the return determination unit that outputs a shutoff request signal makes it possible to shift the start of the return determination depending on the presence or absence of the seismic signal. Release from the return operation after confirmation It is possible.

  The sixth aspect of the invention is the addition of the external communication unit for receiving the seismic signal of the seismic input unit and reporting the presence / absence information of the seismic signal to the outside when the opening signal of the return input unit is received. Even when the seismic display cannot be performed by omitting the seismic display unit, the presence or absence of the seismic signal can be confirmed through an external terminal by communication.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
In FIG. 1, a flow velocity detector 1 outputs a flow velocity signal A corresponding to the flow velocity of the gas flow passing through the gas passage. For example, a permanent magnet installed in the gas shut-off device passes through the gas passage. Due to the difference in the propagation time of ultrasonic waves, a circular motion for one rotation is performed by the passing gas flow, a reed switch is arranged on the locus of the circular motion, and at least a pair of opposed ultrasonic sensors are installed in the gas passage. There is one that detects the gas flow rate, or one that creates a path through which gas flows in the gas passage and detects the gas flow rate from vibrations that occur when the gas flows through the path. Is output.

  When the flow rate value calculation unit 2 receives the flow rate signal A of the flow rate detection unit 1, the flow rate value calculation unit 2 calculates and outputs the flow rate value B. The return input unit 3 outputs an opening signal C for receiving an operation for opening the gas passage. For example, a switch for receiving a return prepared in advance in the gas shut-off device is conceivable.

  The seismic input unit 4 detects an earthquake and outputs a seismic signal D. When the return determination unit 5 receives the opening signal C from the return input unit 3, the flow rate value B of the flow rate calculation unit 2 is a specified value (for example, the flow rate value is 100 L / h or more) within a predetermined period (for example, 2 minutes). If there is a seismic signal D of the seismic input unit 4 (for example, when there is a signal input with a pattern that can be determined to be an earthquake) within a predetermined period (for example, 2 minutes), a cutoff request signal E is output. .

  The valve drive unit 6 outputs a shut-off valve drive signal F when receiving the shut-off request signal E from the return determination unit 5, and the valve 7 closes the valve when receiving the shut-off valve drive signal F from the valve drive unit 6 and opens the gas passage. It is to be plugged.

  When receiving the seismic signal D from the seismic input unit 4, the seismic display unit 8 displays the operation content of the seismic input unit 4. For example, the display is based on the on / off of the seismic signal faithfully. Alternatively, monitoring can be performed every second, and if the seismic signal D is generated during that period, the same effect can be obtained even if it is displayed.

  The operation and action of the gas shut-off device configured as described above will be described below.

  First, the seismic signal D can be confirmed by the worker who is installing the gas shut-off device, so that the gas path can be used for the return judgment even if the switch that accepts the return is pressed when the seismic device is working. Can be easily imagined, and it is not necessary to wait for the maximum waiting time by knowing the timing when the seismic signal D is not received.

  As described above, in the present embodiment, the presence / absence of the seismic signal D from the seismic input unit 4 can be displayed on the seismic display unit 8.

  For example, it may be displayed using an LCD, LED, or the like possessed by the gas shut-off device, or the same effect can be obtained by creating and displaying a dedicated external adapter.

(Embodiment 2)
In FIG. 2, when the display instruction unit 9 receives the seismic signal D from the seismic input unit 4, if there is an input of the seismic signal D for a predetermined time or longer (for example, continuous for 1 second), the display instructing unit 9 passes the seismic signal D. If the seismic signal D is not input for a predetermined time or longer, the through output of the seismic signal D is stopped. As a result, the seismic signal D is a vibration generated when chattering or a dump truck or the like runs on a nearby road, and the gas passage is not closed again by the input of the seismic signal D at the time of return determination. Can be distinguished. The seismic display unit 8 displays based on the seismic signal D output through from the display instruction unit 9.

  With regard to the gas shut-off device configured as described above, first, chattering and external vibration can be eliminated, and the timing at which the operator who installs the gas shut-off device starts the return operation becomes clearer than in the first embodiment. .

  As described above, the display of the seismic display 8 can be turned off when the display instruction unit 9 determines that the gas passage is not reclosed by the input pattern of the seismic signal D after the return operation.

  In FIG. 2, the same reference numerals are given to configurations that exhibit the same actions and operations as those in FIG. 1, and the descriptions of the first embodiment are used.

(Embodiment 3)
In FIG. 3, the judgment stop input unit 10 is an operation input for instructing the validity / invalidity of the seismic signal (for example, a dedicated input switch may be provided, or an inputable device possessed by the current gas shut-off device is provided. If an instruction is given by changing the combination or input pattern, the same effect can be obtained), and the determination stop signal G is output.

  When the return determination unit 5 receives the opening signal C from the return input unit 3, the flow rate value B of the flow rate calculation unit 2 exceeds a specified value within a predetermined period, or there is no determination stop signal G of the determination stop input unit 10. If there is a seismic signal D from the seismic input unit 4 within a predetermined period of time (when there is a judgment stop signal G, the seismic signal D is not judged), a cutoff request signal E is output.

  Regarding the gas shut-off device configured as described above, even if it is recognized that the seismic signal D is output, it is felt by stopping the determination of the seismic signal D by the return determination unit 5 at the judgment of the operator. The waiting time until the seismic signal D is settled can be eliminated.

  As described above, in this embodiment, the determination of the seismic signal D in the return determination unit 5 is stopped by the determination stop signal G from the determination stop input unit 10.

  In FIG. 3, the same reference numerals are given to configurations having the same actions and operations as those in FIG. 1, and the descriptions of the first embodiment are used.

(Embodiment 4)
In FIG. 4, the judgment stop communication unit 11 is a communication message for instructing the validity / invalidity of the seismic signal D (for example, when a new switch or the like cannot be added to the gas shut-off device due to cost or space, or the current gas When it is difficult to input using a device that can be input by the shut-off device, the determination stop signal G is output when the communication means held by the gas shut-off device is received.

  When the return determination unit 5 receives the opening signal C from the return input unit 3, the flow rate value B of the flow rate calculation unit 2 exceeds a specified value within a predetermined period, or there is no determination stop signal G of the determination stop communication unit 11 If there is a seismic signal D from the seismic input unit 4 within a predetermined period, a cutoff request signal E is output.

  Regarding the gas shut-off device configured as described above, even if it is recognized that the seismic signal D is output, it is felt by stopping the determination of the seismic signal D by the return determination unit 5 at the judgment of the operator. The waiting time until the seismic signal D is settled can be eliminated.

  As described above, in this embodiment, the determination of the seismic signal D in the return determination unit 5 is stopped by the determination stop signal G from the determination stop communication unit 11.

  In FIG. 4, the same reference numerals are given to configurations having the same actions and operations as those in FIG. 1, and the descriptions in Embodiment 1 are used.

(Embodiment 5)
In FIG. 5, when the return start instructing unit 12 receives the opening signal C from the return input unit 3, it receives the seismic signal D from the seismic input unit 4, and if there is no seismic signal D, outputs the opening signal C through. If there is a seismic signal D, until the seismic signal D disappears (for example, when the seismic signal D is turned off for 1 second, or when the return judgment unit 5 does not cause reclosing of the gas passage by the seismic signal) (Equivalent effect is obtained even when), the opening signal C is output after a delay.

  When the return determination unit 5 receives the opening signal C output from the return start instruction unit 12, the flow rate value B of the flow rate calculation unit 2 exceeds a specified value within a predetermined period, or the seismic input unit 4 within a predetermined period. If there is a seismic signal D, a cutoff request signal E is output.

  In the gas shut-off device configured as described above, the start of the return determination can be shifted depending on the presence or absence of the seismic signal D, and the operator can always monitor the seismic display unit 8 and the seismic signal D disappears. It can be released from the return operation after confirmation.

  As described above, in the present embodiment, the return start instructing unit 12 determines the presence or absence of the seismic signal D from the seismic input unit 4, and delays until the seismic signal D disappears to determine the return of the opening signal C. Output to unit 5.

  In FIG. 5, the same reference numerals are given to configurations having the same actions and operations as those in FIG. 1, and the description of the first embodiment is used for the description.

(Embodiment 6)
6, when the external communication unit 13 receives the opening signal C of the return input unit 3, the external communication unit 13 receives the seismic signal D of the seismic input unit 4, and the presence / absence information of the seismic signal D is externally held by the gas shut-off device. The same communication means may be used, or a new dedicated communication means can be used to obtain the same effect). In other words, if there is no seismic signal D from the beginning of the return, a telegram is sent, and if there is a seismic signal D, a telegram is sent and then the telegram is sent when the seismic signal D disappears. To do).

  If the seismic display cannot be performed for the gas shut-off device configured as described above (the gas shut-off device does not have an LCD or LED, a new display device cannot be added, or the state of the seismic signal D is displayed. In such a case, the presence or absence of the seismic signal can be confirmed via an external terminal (for example, a dedicated communication terminal device) by communication even in a case where the battery consumption becomes large.

  In the present embodiment, the external communication unit 13 communicates the presence / absence of the seismic signal D of the seismic input unit 4 with the opening signal C of the return input unit 3 as a starting point.

  In FIG. 6, the same reference numerals are given to configurations having the same actions and operations as those in FIG. 1, and the description of the first embodiment is used for the description.

  As described above, in the first to sixth embodiments, it is possible to improve the workability of the installation work of the gas cutoff device and reduce the number of times the valve is driven. For this reason, if batteries of the same capacity are used, it is possible to close the gas passage and communicate due to other events, or it is possible to use a battery having a small capacity, and the gas shut-off device can be downsized.

  As described above, the device that drives the power supply according to the present invention with the battery does not know the internal behavior and causes the battery to be exhausted unnecessarily. If the work efficiency has been lowered, the operation timing can be clarified and optimization can be performed, so that it can be applied to applications such as a water meter.

Functional block diagram of the gas cutoff device in Embodiment 1 of the present invention Functional block diagram of the gas cutoff device in Embodiment 2 of the present invention Functional block diagram of the gas cutoff device in Embodiment 3 of the present invention Functional block diagram of the gas cutoff device in Embodiment 4 of the present invention Functional block diagram of the gas cutoff device in Embodiment 5 of the present invention Functional block diagram of the gas cutoff device in Embodiment 6 of the present invention Functional block diagram of a conventional gas shut-off device Explanatory drawing showing the position of the pipe fitting for the gas shut-off device Schematic diagram of motion state

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flow velocity detection part 2 Flow rate value calculation part 3 Return input part 4 Seismic input part 5 Return judgment part 6 Valve drive part 7 Valve 8 Seismic display part 9 Display instruction | indication part 10 Judgment stop input part 11 Judgment stop communication part 12 Return start Instruction unit 13 External communication unit

Claims (6)

A flow rate detection unit that outputs a flow rate signal corresponding to the flow rate of the gas passing through the gas passage, a flow rate value calculation unit that calculates and outputs a flow rate value upon receiving the flow rate signal of the flow rate detection unit, and a gas passage A return input unit that outputs an opening signal upon receipt of an operation for opening the plug, a seismic input unit that detects an earthquake and outputs a seismic signal, and a predetermined when receiving the opening signal of the return input unit A return determination unit that outputs a shut-off request signal if the flow rate value of the flow rate value calculation unit exceeds a specified value within a period or the seismic input signal of the seismic input unit within a predetermined period; and the return determination unit A valve drive unit that outputs a shut-off valve drive signal when receiving the shut-off request signal, a valve that closes the gas passage when receiving the shut-off valve drive signal of the valve drive unit, and a seismic signal of the seismic input unit Will display the operation details of the seismic input section A seismic display unit, the gas shut-off device characterized by comprising a battery as power source. When the seismic signal from the seismic input unit is received, if the seismic signal is input for a predetermined time or more, the seismic signal is output through, and if the seismic signal is not input for the predetermined time or longer, the seismic signal is output. The display instruction unit stops the through output of the display, and the seismic display unit does not receive the seismic signal from the seismic input unit, but displays based on the seismic signal output through the display instruction unit. The gas shut-off device according to claim 1, wherein A determination stop input unit that outputs a determination stop signal when receiving an operation input instructing the validity / invalidity of the seismic signal is provided, and the return determination unit receives the opening signal of the return input unit within a predetermined period. A shutoff request signal is output if there is a seismic signal of the seismic input unit within a predetermined period when the flow rate value of the gas exceeds a specified value or there is no judgment stop signal of the judgment stop input unit. The gas shut-off device according to 1. A determination stop communication unit that outputs a determination stop signal when receiving a communication message instructing the validity / invalidity of the seismic signal is provided. When the return determination unit receives the opening signal of the return input unit, the flow rate value calculation unit within a predetermined period A shutoff request signal is output if there is a seismic signal from the seismic input unit within a predetermined period when the flow rate value exceeds a specified value or there is no judgment stop signal from the judgment stop communication unit. The gas shut-off device according to 1. When the opening signal of the return input unit is received, the seismic signal of the seismic input unit is received, and if the seismic signal does not exist, the opening signal is output through. A return start instruction unit that outputs the opening signal after delay is provided, and the return determination unit does not receive the opening signal of the return input unit, but outputs the opening signal output from the return start instruction unit. The block request signal is output if the flow rate value of the flow rate calculation unit exceeds a specified value within a predetermined period or if there is the seismic signal of the seismic input unit within the predetermined period. The gas shut-off device as described. The gas shut-off device according to claim 1, further comprising an external communication unit that receives the seismic signal of the seismic input unit when receiving the opening signal of the return input unit and reports the presence / absence information of the seismic signal to the outside.

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