JPH0961284A - Pipe leakage monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably, highly accurately and automatically sense whether fluid leaks from a pipe line by closing a shut-off valve when flow of fluid in the pipe line drops to a predetermined value or lower and by measuring a pressure change at downstream of the shut-off valve. SOLUTION: A control means 22 monitors a flow rate in a pipe line 17 by a measured value of an instantaneous flow meter 21 and closes a shut-off valve 18 when the flow rate drops to a predetermined value or lower. When pressure in a downstream pipe line 20 measured by a downstream pressure detecting means 19 drops to a predetermined value or lower within a predetermined time, leakage is determined, and when measurement is complete, the valve 18 is opened and gas is normally supplied. By using the flow meter 21, drop of the flow rate to a predetermined value or lower can be determined instantly, so that a trouble such as a flame failure in a gas device 28 can be prevented even if the valve 18 is closed. When a reducing valve 24 reaches set pressure with the gas device 28 used during pressure measurement with the valve 18 closed, the gas may be supplied from the valve 24 allowing normal operation, while when the valve 24 is operated, leakage determination is stopped to have the valve 18 opened to normally supply the gas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping leakage monitoring device for automatically detecting the presence or absence of fluid leakage in a transportation pipeline for transporting a fluid.

[0002]

2. Description of the Related Art Conventionally, a leakage monitoring device for a pipeline for transporting a fluid has been disclosed in JP-A-4-64787 and JP-A-4-363.
A configuration of a leak monitoring device for gas supply piping as disclosed in Japanese Patent No. 638 has been known. Hereinafter, regarding the configuration, FIG.
Will be described with reference to FIG.

First, in the conventional example shown in FIG. 10, a gas supply source 1 such as propane gas, a gas supply pipe 2, and a parent gas meter 3 for integrating the entire supply gas from the gas supply source 1.
And an individual gas meter 4 for integrating the individual gas usage of each supply destination, and an individual gas appliance 5. Here, the parent gas meter 3 takes in the flow rate detection mechanism 6 and the CPU 7 which takes in the data detected by this detection mechanism to judge whether it is normal, and the data calculated by the CPU 7 is taken out through the signal line 8. The communication controller 9 is provided and the data is transmitted to the host computer 11 on the center side through the telephone line 10. Here, 12 is a pressure regulator and 13 is a valve.

In such a configuration, the flow rate detection mechanism 6 installed in the parent gas meter 3 detects the flow rate, and learns the gas usage reduced time zone, the minimum flow rate and their deviation values, and calculates the total value of these and the current value. The data is compared with the current data to determine whether the current data is within the normal range, and an alarm output is generated if the current data is considered abnormal.

Further, in another conventional example shown in FIG. 11, a parent gas meter 3 for integrating the entire supply gas from the gas supply source 1, a gas supply pipe 2, and an individual gas meter 4 for each supply destination.
The gas is supplied to the gas appliance 5 via the flowmeter, and the parent gas meter 3 and the individual gas meter 4 are provided with a flow rate transmitting function 14
And a gas supply leak monitoring device that has exchangeable flow rate information with the management device 15 that manages each gas meter. Here, 16 is a micro leak monitoring meter.

In such a structure, the gas flow rate during a predetermined time is collected in the management device for each gas meter in the management device by the flow rate transmitting function in a time zone in which the gas usage is small in one day.
Sum N1 + N2 + ... of the flow rate value Ns of the parent gas meter 3 and the flow rate values N1, N2, ...
... + Nn, and if Ns ≤ N1 + N2 + ... + Nn (Equation 1), it is considered that there is no leakage, and if Ns> N1 + N2 + ... + Nn ... (Equation 2), there is a leakage determination method. It was configured to have.

[0007]

However, in the pipe leakage monitoring device as in the conventional example, the pipe leakage determination is performed on the assumption that there is a period when the gas appliances of all homes are not used at the same time. As the number of homes increases and the lifestyles of residents change, is there really a gas leak upstream of individual gas meters, or is gas appliances such as a gas air conditioner continuously used? There is a problem that it becomes ambiguous and the reliability of the leak judgment by the pipe leak judging means is significantly reduced, and even if there is continuous use of igniting, it is erroneously judged that there is a gas leak upstream of the gas meter. It was

In another conventional example, the gas flow rate measurement is ±
Since there is an error of about 3%, when calculating the total flow rate of each individual gas meter, the error of each meter is superimposed and expands, and the reliability of leak judgment is significantly reduced, and the number of units increases. When it comes, it is very difficult to collect the flow rate of each individual meter at the same time, and the information to judge the leakage even if the total flow rate of each individual meter measured at a time different from the measurement time of the parent gas meter is compared. However, there was a problem of low reliability.

The present invention is to solve the above-mentioned problems. It is a first object of the present invention to block a pipe by a shutoff valve and measure a pressure fluctuation in the pipe by a downstream pressure detecting means to reliably and accurately determine a leak. The purpose of 1.

A second object is to provide a pressure reducing valve in a bypass passage parallel to the shutoff valve so that gas can be supplied without being exhausted even when a gas appliance is used on the downstream side.

A third object is to facilitate installation in an existing pipeline by detecting flow information in the pipeline by a plurality of individual flow rate measuring means provided downstream.

A fourth object is to reliably detect the gas flow by detecting the gas usage information from the operation information of a plurality of gas appliances provided downstream.

A fifth object is to detect the flow information in the pipeline by comparing the two pressures of the upstream pressure detecting means and the downstream pressure detecting means on the upstream side of the shutoff valve.

A sixth object is to automatically open the shutoff valve when the pressure reducing valve is opened to stop the leakage determination and automatically supply the gas.

Further, a seventh object is to improve the accuracy of the determination by periodically performing the leakage determination and by performing the leakage determination in the time period during which the gas is less used from the gas use pattern in the time period between the periodic determination times. .

The eighth object is to improve the accuracy of the leak judgment by judging the leak when the results of the leak judgment of a plurality of times match all times.

A ninth object is to prevent a leakage accident by making a safety judgment by making a leakage judgment when the leakage is judged even once even among the plural times of the leakage judgment results.

A tenth object is to improve the installability of the leak monitoring device by exchanging information between a plurality of individual flow rate measuring means and control means by wireless communication.

An eleventh object is to prevent a trouble such as misfire of the gas appliance even if the shutoff valve is closed because the instantaneous flow rate measuring means determines that the flow in the pipeline has stopped.

A twelfth object is to notify by the data transmission device when it is determined that there is a leak.

[0021]

The first means for achieving the above first object of the present invention is a shutoff valve provided in a pipe line, and a downstream pressure detecting means provided downstream of the shutoff valve. A pipeline flow detecting means provided in a pipeline further downstream of the downstream pressure detecting means, and a shutoff valve is closed when the flow in the pipeline becomes a predetermined value or less by the pipeline internal flow detecting means. The control means for judging the pressure fluctuation of the downstream pressure detection means and monitoring the leakage is provided.

The second purpose for achieving the second object
The means has a configuration in which a bypass passage connecting the upstream side and the downstream side of the shutoff valve with another passage and a pressure reducing valve in the middle of the bypass passage are provided.

The third means for achieving the third object is to judge the flow in the pipeline by the flow rate information signals from a plurality of individual flow rate measuring means provided on the downstream side of the shutoff valve. The configuration is provided with a flow detecting means in the pipeline.

Further, a fourth object for achieving the fourth object
The means of (1) is configured to include an in-pipe flow detecting means for determining the flow in the pipe by operating information signals from a plurality of gas appliances provided on the downstream side of the shutoff valve.

And the fifth to achieve the fifth objective
Means for comparing the first pressure value detected by the upstream pressure detecting means provided on the upstream side of the shutoff valve with the second pressure value detected by the downstream pressure detecting means, The configuration is provided with a flow detecting means in the pipeline for detecting the flow.

The sixth means for attaining the sixth object has a control means for stopping the leak judgment by opening the shut-off valve when the pressure reducing valve is opened.

Furthermore, a seventh object for achieving the seventh object
The means is configured to include a control means that learns the pressure fluctuation of the downstream pressure detection means and monitors the leakage from the result of determination in the time period when the gas is least used.

Then, an eighth object for achieving the eighth object
The means is configured to include a control means for performing the leakage determination a plurality of times and outputting the leakage alarm signal only when the result is determined to be the leakage all times.

The ninth means for achieving the ninth object is provided with a control means for performing a leak determination a plurality of times and outputting a leak warning signal when the result is determined to be a leak one or more times. It was configured.

Further, a tenth means for achieving the tenth object is a first wireless communication means for transmitting flow rate information signals respectively provided in a plurality of individual flow rate measuring means, and the first wireless communication means. The second wireless communication for receiving the transmission signal from the communication means is provided in the control means.

Further, the first for achieving the eleventh object
The first means is configured to include a pipe flow detection means using an instantaneous flow rate measurement means.

The twelfth means for attaining the twelfth object has a configuration including a data transmission device for transmitting the predetermined determination result obtained by the control means.

[0033]

According to the first aspect of the present invention, according to the first means, the shutoff valve closes the pipeline and the downstream pressure detecting means measures the pressure fluctuation in the pipeline to reliably and accurately determine the leak. can do.

According to the second means, by providing the pressure reducing valve in the bypass flow path parallel to the shutoff valve, the gas can be supplied even when the gas appliance is used on the downstream side.

Further, according to the third means, it is possible to facilitate the installation in the existing pipeline by detecting the flow information in the pipeline by the plurality of individual flow rate measuring means provided in the downstream. .

Further, according to the fourth means, the gas usage information can be detected by the operation information of the plurality of gas appliances provided downstream, and the gas flow can be detected reliably.

According to the fifth means, the flow information in the pipeline can be detected by comparing the two pressures of the upstream pressure detecting means and the downstream pressure detecting means on the upstream side of the shutoff valve.

Further, according to the sixth means, when the pressure reducing valve is opened, the shutoff valve is also opened to stop the leak determination, and the gas supply can be automatically enabled.

Further, according to the seventh means, the leakage determination is carried out periodically and the leakage determination is carried out from the gas use pattern in the time zone between the regular determination times and in the time zone in which the gas use is small, thereby improving the determination accuracy. be able to.

According to the eighth means, it is possible to improve the accuracy of the leak determination by determining the leak when the results of the leak determination of a plurality of times match all times.

Further, according to the ninth means, it is possible to prevent a leakage accident by making a safety judgment by making a leakage judgment when even one of the plural times of leakage judgment results is judged to be a leakage. .

According to the tenth means, it is possible to improve the installability of the leakage monitoring device by exchanging information between the plurality of individual flow rate measuring means and the control means by wireless communication.

According to the eleventh means, since the instantaneous flow rate measuring means determines that the flow in the pipeline has stopped, even if the shutoff valve is closed, troubles such as misfiring of the gas appliance can be prevented. it can.

Further, according to the twelfth means, the abnormality can be notified by the data transmission device when it is judged that there is a leak.

[0045]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pipe leakage monitoring device according to a first embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, a shutoff valve 18 provided in the pipe line 17, a downstream pressure detecting means 19 provided downstream of the shutoff valve 18, and a further downstream side of the downstream pressure detecting means 19. An instantaneous flow meter 21 as a pipeline flow detecting means provided in the pipeline 20, and the shut-off valve 18 is closed when the flow rate in the downstream pipeline 20 is below a predetermined value by the instantaneous flow meter 21. The control means 22 for monitoring the leakage by measuring the pressure fluctuation of the downstream pressure detecting means 19 is provided. Further, the bypass valve 23 connecting the upstream side and the downstream side of the shutoff valve 18 with another channel, and the pressure reducing valve 24 in the middle of the bypass channel 23 are provided. Here, 25 is the main pipeline, 2
6 is a manual shutoff valve, 27 is an individual flow rate measuring means, 28 is a gas appliance, 29 is a housing complex, 30 is the ground, and 31 is a wireless telephone device as a data transmission device.

In such a structure, the control means 22 monitors the flow rate by the information of the instantaneous flow meter 21, and closes the shutoff valve 18 when the flow rate becomes equal to or less than the predetermined value Q0. Then, as shown in FIG. 3, if the pressure fluctuation in the downstream pipeline 20 measured by the downstream pressure detecting means 19 decreases by a predetermined value ΔP or more within a predetermined time ΔT, it can be determined that there is a leak. . When measurement is completed, shutoff valve 1
8 is for reopening and supplying the gas normally. Here, since the instantaneous flowmeter 21 is used, it can be instantly determined that the flow rate is below a predetermined value, and the shutoff valve 1
Even if 8 is closed, trouble such as misfire of the gas appliance 28 does not occur. In the conventional membrane type flow meter, even if the flow rate was measured for one hour and the flow rate was less than a predetermined value, the current flow rate was not known, so there was a problem that closing the shutoff valve would cause a gas appliance that was used to misfire. .

Then, if the gas appliance is used while the shutoff valve 18 is closed and the pressure is being measured, as shown in FIG.
As shown in FIG. 4, when the pressure in the downstream side pipe line 20 decreases and reaches a predetermined pressure P1 set in the pressure reducing valve, the pressure reducing valve 24
The gas is supplied from the gas appliances and the gas appliances can operate normally. When the pressure reducing valve 24 operates, the leakage determination is stopped and the shutoff valve is opened, so that the gas can be normally supplied and the gas appliance can be safely operated before the gas appliance reaches the maximum combustion.

Further, although the leakage determination is periodically performed at a predetermined interval, in the leakage monitoring which is regularly performed, when the predetermined time T1 is reached, the leakage monitoring is first performed when the flow rate becomes Q0 or less after the time T1. However, in that case, there was a case where the gas appliance was used in a relatively large flow rate state or a gas instrument was used after a short time and the measurement could not be performed well, and the reliability of the determination deteriorated. However, the reliability of the leakage monitoring can be enhanced by searching the time zone most suitable for the leakage monitoring and performing the leakage determination by pattern learning during the regular intervals. As shown in FIG. 5, the control means monitors the gas flow rate so that the flow rate is the predetermined flow rate Q0 for a long time.
Pattern learning is performed to detect when the following measurement conditions are the best. Then, at that time, the shutoff valve is closed and the leakage is monitored. Thus, the detection accuracy and reliability can be improved by detecting the time T0 with the best measurement conditions and monitoring the leakage.

Further, by performing the leakage monitoring a plurality of times, the determination results of the plurality of times are used, and when the determination results of all times match, the determination accuracy is improved by determining the leakage, and the gas supply is improved. It is possible to prevent erroneous cutoff. Also,
In another algorithm, even if it is judged as leakage even once,
By determining that there is a leak, it is possible to operate on the safe side and enhance the safety of gas supply. These algorithms can be used depending on the situation, and immediately after installing the leak monitoring device, the all-matching algo is adopted to monitor the applicability of the leak monitoring, and the predetermined period elapses. If the leakage monitoring is performed normally, the leakage judgment will be 1
Malfunctions can be reduced by making the determination once. In addition, the accuracy of the judgment is automatically improved by adding a function to change the number of leak judgments and the method of determining leaks while watching the elapsed time after installing the leak monitor. You can go.

If it is determined that there is a leak, a leak alarm is automatically notified to the gas supply management center or the like by the wireless telephone device 31 connected to the control means 22. By using a wireless telephone device, wiring work is not required, and by registering a telephone number, it is possible to easily report an abnormality to various places.

Next, a second embodiment will be described with reference to FIGS. 6 and 7. The parts having the same structure as those of the first embodiment and having the same function are designated by the same reference numerals, and detailed description thereof will be omitted, and different parts will be mainly described.

As shown in FIGS. 6 and 7, the flow in the downstream conduit 20 is determined by the flow rate signals of the gas meters 27, which are a plurality of individual flow rate measuring means provided on the downstream side of the shutoff valve 18. It is configured to include a flow determining means in the pipeline. Here, 32 is a first wireless communication means, and 33 is a second wireless communication means.

In such a configuration, the flow rate information of each gas meter 27 is transmitted by the first wireless communication means 32 and received by the second wireless communication means 33 provided in the control means 22. When all the flow rate information of each gas meter 27 is below a predetermined value, it is determined that the flow rate is stopped and the shutoff valve 18 is closed. Then, the leak determination is performed by measuring the pressure in the downstream pipe line 20. Leakage determination is performed in the same manner as in the first embodiment. When even one of the gas meters detects the flow rate, the information is transmitted to the control means 22 by a radio signal to stop the leakage monitoring and open the shutoff valve. As described above, in the case of an apartment house in which a gas meter has already been installed, there is an effect that the construction work can be easily performed simply by adding construction for installing the wireless communication means to each gas meter.

Next, a third embodiment will be described with reference to FIG. The same structure as that of the first embodiment, and the portions having the same functions are denoted by the same reference numerals, and detailed description thereof will be omitted.
The different parts will be mainly described.

As shown in FIG. 8, an in-pipe flow detecting means for determining the flow in the downstream pipe 20 based on operation information from a plurality of gas appliances 28 provided on the downstream side of the shutoff valve 18 is provided. It has a different configuration.

In such a configuration, each gas appliance 28
The driving information is transmitted by the first wireless communication means 32 and is received by the second wireless communication means 33 provided in the control means 22. When the operation information of all the gas appliances 28 is stopped, it is determined that the flow rate is stopped and the shutoff valve 18 is closed. Then, the leak determination can be performed by measuring the pressure in the downstream side pipeline 20. Leakage determination is performed in the same manner as in the first embodiment. Here, when even one of the gas appliances is aware of the operation, the information is transmitted to the control means 22 by a radio signal to stop the leakage monitoring and the shutoff valve 1
8 is opened. As described above, in the case of an apartment house in which a gas meter is already installed, there is an effect that the construction work can be easily performed by simply adding construction for installing the wireless communication means to each gas appliance.

Next, a fourth embodiment will be described with reference to FIG. The same structure as that of the first embodiment, and the portions having the same functions are denoted by the same reference numerals, and detailed description thereof will be omitted.
The different parts will be mainly described.

As shown in FIG. 9, the first pressure value P1 detected by the upstream pressure detecting means 34 provided on the upstream side of the shutoff valve 18 and the second pressure value detected by the downstream pressure detecting means 19. It is configured to include an in-pipe flow detecting means for detecting the flow in the pipe 17 by comparing P2.

In such a structure, the first pressure value P
When 1 and the second pressure value P2 have a relationship of P1 ≦ P2, it is determined that the flow rate is stopped, and the shutoff valve 18
Close. Then, the leak determination can be performed by measuring the pressure in the downstream side pipeline 20 by the downstream pressure detecting means 19. Leakage determination is performed in the same manner as in the first embodiment. When P1> P2, it is determined that the gas has started to be used, the leakage monitoring is stopped, and the shutoff valve 18 is opened.

Further, by providing the upstream pressure detecting means on the upstream side of the shutoff valve 18, even if the shutoff valve 18 is closed, as long as the bypass flow passage 23 is open, the flow in the pipe line can be determined. It is possible to determine whether the flow is flowing in the direction. Therefore, even when the pressure reducing valve 24 remains open for a long time, the flow in the pipeline can be monitored by P1 and P2, and if the flow rate, that is, the pressure difference is equal to or less than the predetermined flow rate, Leakage monitoring can also be performed.

[0062]

As is apparent from the above description, the pipe leakage monitoring device of the present invention has the following advantages.

According to the first means of the present invention, the shutoff valve closes the pipeline, and the downstream side pressure detecting means determines the pressure fluctuation in the pipeline, so that the leak can be reliably and accurately determined.

According to the second means, by providing the pressure reducing valve in the bypass passage parallel to the shutoff valve, the gas can be supplied even when the gas appliance is used on the downstream side, and the misfire is prevented. Can be prevented.

Further, according to the third means, it is possible to facilitate the installation in the existing pipeline by detecting the flow information in the pipeline by the plurality of individual flow rate measuring means provided in the downstream. .

Further, according to the fourth means, the gas use information can be detected by the operation information of the plurality of gas appliances provided downstream, and the gas use information can be reliably detected.

According to the fifth means, the flow information in the pipe can be detected by comparing the two pressures of the upstream pressure detecting means and the downstream pressure detecting means on the upstream side of the shutoff valve.

Further, according to the sixth means, when the pressure reducing valve is opened, the shutoff valve is also opened to stop the leak judgment, and the gas can be automatically used.

Further, according to the seventh means, it is possible to improve the determination accuracy by performing the leakage determination from the gas use pattern during the time period between the regular determination times and during the time period when the gas usage is small.

Further, according to the eighth means, it is possible to improve the accuracy of the leak judgment by judging the leak when the results of the leak judgment of a plurality of times match all times.

According to the ninth means, it is possible to prevent a leakage accident by making a safety judgment by making a leakage judgment when it is judged that even one of the leakage judgment results of a plurality of times is leakage. .

According to the tenth means, it is possible to improve the installability of the leakage monitoring device by exchanging information between the plurality of individual flow rate measuring means and the control means by wireless communication.

Further, according to the eleventh means, it is judged from the information of the instantaneous flow rate measuring means that the flow in the pipeline has stopped. Therefore, since it corresponds well to the current flow state, the shutoff valve is closed. Even then, troubles such as misfire of gas appliances can be prevented. Then, when it is determined that there is a leak, it is possible to make a notification via a telephone line, and it is possible to easily make a notification to various places.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a pipe leakage monitoring device showing an embodiment of the present invention.

FIG. 2 is a block diagram of the periphery of the control means of the device.

FIG. 3 is a characteristic diagram illustrating the operation of the device.

FIG. 4 is a characteristic diagram illustrating another operation of the device.

FIG. 5 is a characteristic diagram illustrating still another operation of the device.

FIG. 6 is a configuration diagram of a pipe leakage monitoring device showing another embodiment of the present invention.

FIG. 7 is a block diagram showing the configuration around the control means of the device.

FIG. 8 is a configuration diagram of a pipe leakage monitoring device showing another embodiment of the present invention.

FIG. 9 is a configuration diagram of a pipe leakage monitoring device showing still another embodiment of the present invention.

FIG. 10 is a configuration diagram of a conventional pipe leakage monitoring device.

FIG. 11 is a block diagram of another conventional pipe leakage monitoring device.

[Explanation of symbols]

 17 Pipeline 18 Shutoff Valve 19 Downstream Pressure Detection Means 20 Downstream Pipeline 21 Instantaneous Flowmeter (Pipeline Flow Detection Means) 22 Control Means 23 Bypass Flow Path 24 Pressure Reduction Valve 27 Gas Meter (Individual Flowrate Measurement Means) 28 Gas Appliance 31 Wireless telephone device (data transmission device) 32 First wireless communication means 33 Second wireless communication means 34 Upstream pressure detection means

Claims (12)

[Claims] 1. A shutoff valve provided in a pipe line, a downstream pressure detection means provided downstream of the shutoff valve, and an in-pipe flow flow detection means provided in a downstream side pipe line of the downstream pressure detection means. A pipe provided with a control means for closing the shutoff valve when the flow in the pipeline becomes a predetermined value or less by the flow detection means in the pipeline and for judging the pressure fluctuation of the downstream pressure detection means to monitor the leakage. Leakage monitoring device. 2. The pipe leakage monitoring device according to claim 1, further comprising a bypass passage connecting the upstream side and the downstream side of the shutoff valve with separate passages, and a pressure reducing valve in the middle of the bypass passage. 3. A pipe flow detecting means for judging the flow in the pipe according to flow rate information signals from a plurality of individual flow rate measuring devices provided on the downstream side of the shutoff valve. 2. The pipe leakage monitoring device described in 2. 4. The pipe flow detecting means for judging the flow in the pipe according to operation information signals from a plurality of gas appliances provided on the downstream side of the shutoff valve. Pipe leakage monitoring device. 5. The inside of the pipeline by comparing the first pressure value detected by the upstream pressure detecting means provided on the upstream side of the shutoff valve with the second pressure value detected by the downstream pressure detecting means. The pipe leakage monitoring device according to claim 1 or 2, further comprising an in-pipe flow detecting means for detecting the flow of the pipe. 6. The pipe leakage monitoring device according to claim 2, further comprising control means for opening the shutoff valve and stopping the leakage determination when the pressure reducing valve is opened. 7. The pipe leakage monitoring device according to claim 1 or 2, further comprising control means for learning pressure fluctuations of the downstream pressure detecting means and monitoring leakage during a time period when gas is least used. 8. The pipe according to any one of claims 1 to 7, further comprising control means for performing a plurality of leak determinations and outputting a leak warning signal only when it is determined that all of the leaks have been determined. Leakage monitoring device. 9. The pipe according to any one of claims 1 to 7, further comprising control means for performing a plurality of leak determinations and outputting a leak warning signal when it is determined that the leak is one or more of the results. Leakage monitoring device. 10. A first wireless communication means for transmitting a flow rate information signal respectively provided in a plurality of individual flow rate measuring means, and a second wireless communication for receiving a transmission signal from the first wireless communication means. The pipe leakage monitoring device according to claim 3, which is provided. 11. The pipe leakage monitoring device according to claim 1 or 2, further comprising a pipe flow detection means using an instantaneous flow rate measurement means. 12. A data transmission device for transmitting a predetermined determination result obtained by the control means, according to claim 1 or 2.
The described pipe leakage monitoring device.