JP3549167B2 - Gas pipe leak detection device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a gas pipe leak detection device for improving safety in gas use.
[0002]
[Prior art]
In recent years, safety has been emphasized, but the same applies to gas accidents, and the reliability of gas leak detection is an issue.
[0003]
Hereinafter, a conventional gas pipe leakage detection device will be described with reference to the drawings. FIG. 2 is a block diagram showing a configuration of a conventional gas pipe leakage detection device. In the figure, 1 is a large gas meter such as an apartment house, 2 is a flow measuring means for measuring the flow rate of the gas meter 1, 3 to 5 are individual gas meters installed in each home, and 6 to 8 are individual gas meters, respectively. The individual flow rate measuring means 9 for measuring the flow rate through the pipe is connected to the gas meter 1 and the individual gas meters 3 to 5.
[0004]
When inspecting such gas piping on a regular basis, a person in charge inspects each household.
[0005]
[Problems to be solved by the invention]
In such a conventional gas leak detection device, a staff member patrols each home and confirms that no gas is used, and then performs a leak inspection of the gas pipe 9 using an instrument such as a manometer. However, there is a problem that labor is large due to the recent labor shortage.
[0006]
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a gas pipe leak detection device capable of automatically performing a leak inspection of a gas pipe and reducing a human inspection work.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a large gas meter such as an apartment house, a flow rate measuring means for measuring a flow rate of the gas meter, an individual gas meter for each household, and a passage of the individual gas meter. Individual flow rate measuring means for measuring the gas amount, a flow rate integrating section for integrating all of the individual flow rates measured by the individual flow rate measuring means to obtain an integrated flow rate, and instructing a gas leak inspection from an external center through communication. An external signal receiving unit for receiving an inspection instruction signal, a notifying unit for notifying an inspection result to the outside, and a control unit for controlling the entire operation, the control unit includes an external signal receiving unit that outputs the inspection instruction signal. Upon receipt, the integrated flow rate is compared with the passing flow rate, and when the integrated flow rate is extremely smaller than the passing flow rate, the gas meter and the individual gas meter are connected. It determines the scan pipe and there is a gas leak, Ru gas pipe leak detection system der which is adapted to notify the warning gas leakage to the outside by the notification means.
[0008]
[Action]
In the present invention, when the external signal receiving unit receives an inspection instruction signal from an external center through communication, the inspection is automatically started, the integrated flow rate is compared with the passing flow rate, the gas leak is inspected, and the inspection result is notified by the notification unit. Notify outside.
[0010]
Hereinafter, an embodiment of a gas pipe leakage detection device of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the present embodiment. Incidentally, a detailed description thereof is omitted by assigning the No. identical marks the same components as the conventional example shown in FIG. This embodiment is different from the conventional example shown in FIG. 2 in that the individual flow rate signals output by the individual flow rate measuring means 6 to 8 of the individual gas meters 3 to 5 for each household are all integrated and the integrated flow rate signal is obtained. A flow integrating unit 10 for outputting, an external signal receiving unit 11 for receiving an inspection instruction signal of the gas pipe 9 transmitted from the outside by communication or the like, a notifying unit 12 for notifying the inspection result, and controlling the operation of the entire apparatus. The control unit 13 performs a gas leak inspection about once every six months.
[0011]
The operation of the above configuration will be described. When the external signal receiving unit 11 receives an inspection instruction signal for instructing the inspection of the gas pipe from an external center, the control unit 13 outputs the individual flow rate measuring means 6 to 8 of the individual meter of each home by the flow integrating unit 10. Based on the individual flow rate signal, the total flow rate of the flow rates is integrated and obtained. The flow rate integrated signal is compared with the flow rate signal of the flow rate measuring means 2 of the gas meter 1, and the flow rate integrated signal adds a predetermined value to the flow rate signal. If the flow rate is too small, for example, the flow signal of the main gas meter 1 indicates a passing gas flow rate value of 100 m ³ / h, and the flow rate from the flow rate integrating unit 10 which is the total value of the passing gas quantity for each household. When the integrated signal is 70 m ³ / h, it means that (100-70) m ³ / h gas is leaking somewhere. The gas pipe leakage is determined by this calculation, and an abnormality warning indicating that the gas pipe is abnormal is transmitted from the notification means 12 to an external center through communication or the like. The abnormality warning may be displayed by a light emitting diode or a liquid crystal, or may be sound.
[0012]
When the difference between the flow rate of the flow rate signal and the flow rate integration signal is equal to or smaller than a predetermined value, the control unit 13 outputs a gas pipe OK signal indicating that there is no leak in the gas pipe 9 to the notifying unit 12, and outputs the gas pipe OK signal. The input notifying means 12 sends out a notification indicating that there is no gas pipe leakage to an external center by communication. The control unit 13 and the flow rate accumulating unit 10 may be provided in the gas meter 1 or may be provided on an external center via a telephone line or the like.
[0015]
【The invention's effect】
As is clear from the above description, a large gas meter such as an apartment house, a flow rate measuring means for measuring a flow rate of the gas meter, an individual gas meter for each household, and a gas flow rate of the individual gas meter are measured. An individual flow rate measuring means, a flow integrating section for integrating all of the individual flow rates measured by the individual flow rate measuring means to obtain an integrated flow rate, and an inspection instruction signal for instructing a gas leak inspection from an external center through communication. An external signal receiving unit for receiving, a notifying unit for notifying an inspection result to the outside, and a control unit for controlling the entire operation, the control unit, when the external signal receiving unit receives an inspection instruction signal, the Comparing the integrated flow rate with the passing flow rate, if the integrated flow rate is extremely smaller than the passing flow rate, a gas pipe connecting the gas meter and the individual gas meter By judging that there is a gas leak and notifying the outside of the warning of the gas leak by the notifying means, the gas leak inspection is automatically executed by the inspection instruction signal from the outside, so that the gas leak accident is anticipated. it is possible to prevent the, Ru can reduce the human inspection work.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an embodiment of a gas leak detection device of the present invention. FIG. 2 is a block diagram showing a configuration of a conventional gas leak detection device.
DESCRIPTION OF SYMBOLS 1 Main gas meter 2 Flow measuring means 3-5 of gas meter 1 Individual gas meter 6-8 of each home Individual flow measuring means 9 of each individual gas meter 9 Gas pipe 10 Flow integrating unit 11 External signal receiving unit 12 Notification unit 13 Control unit

Claims (1)

A large gas meter such as an apartment house, a flow rate measuring means for measuring a flow rate of the gas meter, an individual gas meter for each household, an individual flow rate measuring means for measuring a passing gas amount of the individual gas meter, and the individual A flow integrating section for integrating all of the individual flow rates measured by each of the flow measuring means to obtain an integrated flow rate, an external signal receiving section for receiving a test instruction signal for instructing a gas leak test from an external center through communication, A notifying unit for notifying the result to the outside, and a control unit for controlling the entire operation, the control unit, when the external signal receiving unit receives a test instruction signal, compares the integrated flow rate with the passing flow rate. In the case where the integrated flow rate is extremely smaller than the passing flow rate, it is determined that there is a gas leak in a gas pipe connecting the gas meter and the individual gas meter, Gas pipe leak detection system which is adapted to notify the warning gas leakage to the outside by the knowledge unit.

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