KR101803453B1 - System for checking leakage of underground - Google Patents

Abstract

More particularly, the present invention relates to a leakage detection system, and more particularly, to a leakage detection system that firstly selects leaked suspicion sections through first detection means, secondly performs concentrated leak detection of the second detection means with respect to leaked suspected sections, And more particularly, to a leak detection system for a buried pipeline, which can improve the accuracy of the detection system and perform an immediate repair work and has an advantage that an efficient system operation can be performed.

Description

SYSTEM FOR CHECKING LEAKAGE OF UNDERGROUND [0002]

The present invention relates to a water leakage detection system, and more particularly, to a water leakage detection system in which a first detection means is provided for every predetermined section of a pipeline to firstly select a leakage suspicion section, and secondly, The present invention relates to a water leakage detection system for a pipeline embedded in the ground, which is constructed such that a leakage point can be identified through a leakage check, and a more efficient and accurate leak diagnosis and an immediate repair work can be performed.

In the context of increasing unevenness of rainfall due to climate change and increasing population and water usage due to urbanization, the disparity of supply and demand is intensifying. Therefore, management of water supply network is one of the most basic and important matters in the management of tap water It is one.

In general, the water supply network accounts for about 70% of the water supply facilities, but the maintenance of the water supply network is inadequate. In Korea, the amount of water leakage during the process of supplying water is 640 million ㎥ (2.1 times that of Namkang dam in 2010), and the amount of water leaked in the last 10 years is 7.5 billion ㎥.

In addition, the reliability of tap water is deteriorating due to aging of pipe network and deterioration of water quality caused by improper supply system.

In addition, the management of leaks is essential for the network to be installed for the purpose of gas and oil supply, not only to reduce the loss but also to prevent major accidents.

In order to detect such leakage, a variety of techniques have been proposed in the past. In particular, in the case of a water pipe, a leakage sensor disclosed in Korean Patent Laid-Open No. 10-2007-0005234 has been proposed. However, Is installed to detect the leakage of the chemical by winding it on a pipe or the like. In this case, the installation cost and the construction period are excessively required to be applied to a wide range of waterworks pipe network, and it is difficult to precisely detect the leakage point This will remain.

Korean Patent Publication No. 10-2007-0005234

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a leak detection system and a leakage detection method, And to provide a water leakage detection system of pipelines embedded in the ground that can efficiently and precisely detect water leakage and is easy to apply to a built-in pipeline.

According to an aspect of the present invention, there is provided a water leakage detection system for a pipeline embedded in a ground, comprising: first detection means installed in a predetermined section of a pipeline buried in the ground; Second detection means for generating a second detection signal, which is a plurality of detection signals provided along the pipeline, one or more of which are disposed between a pair of first detection means and which are measured values of pipeline and pipeline periphery information; Wherein the first detection means and the second detection means communicate with each other to detect a leakage suspicion section from the first detection signal and to analyze a second detection signal of the leaked suspicious section, And a server.

At this time, the flow meter is applied to the first detection means, and the flow meter is configured to measure the flow rate value of the pipe at the installed point.

The second detection unit may include a sensing unit configured to generate a second detection signal, And an RFID unit connected to the sensing unit and disposed so as to be exposed on the ground where the sensing unit is installed and storing channel information of the channel.

Meanwhile, the sensing unit is connected to at least one of a temperature sensor, a humidity sensor, a pressure sensor, and a vibration sensor, and is generated through at least one of the temperature sensor, the humidity sensor, the pressure sensor, and the vibration sensor, And a storage unit for collecting and storing the detected second detection signals.

As an example, the second detection unit may be connected to the relay station, and the relay station may receive the second detection signal and the unique code from the storage unit and transmit the second detection signal and the unique code to the central server. And a power supply unit for supplying power to the second detection unit.

As an example, the pressure sensor may be a watertight structure including a body formed with an inner space portion and a pressing projection formed on an inner bottom surface thereof and attached to a pipeline; A weight weight spaced upward from the inner bottom surface of the body in the space portion and having a pressing end projecting from the bottom; And a signal generating unit which is disposed in close contact with the pressing protrusion and converts a vibration signal of the weight to a second detection signal and transmits the second detection signal to the storage unit.

In this case, the signal generating unit may include: a socket having a center hollow; A piezoelectric element disposed in the hollow; A first board fixed on an upper surface of the socket and having an upper surface closely contacted with the pressure terminal and a lower surface closely contacting the upper surface of the piezoelectric element to generate a first signal; And a second board fixed on a lower surface of the assembly socket and having a lower surface closely contacted with the pressing projection and an upper surface closely contacting the lower end of the piezoelectric element to generate a second signal.

The outer peripheral coating layer is formed on the outer circumferential surface of the weight, and the outer peripheral coating layer is composed of 10 to 20 parts by weight of the cericite powder, 1 to 5 parts by weight of manganese oxide, 0.5 to 3 parts by weight of cellulose acetate per 100 parts by weight of the polyacrylic acid resin And 1 to 5 parts by weight of calcium nitrite.

As described above, according to the present invention, in the leakage detection system for pipelines buried in the ground, the leak detection section is firstly selected through the first detection section, the leak detection section of the second detection section is secondarily detected for the leak detection section, It is possible to perform an immediate repair work by improving the accuracy of the leak detection system and to easily apply the second detection means to a built-in pipeline by using the second detection means as a single module.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing an embodiment of a leakage detection system of a pipeline buried in the ground according to the present invention. FIG.
2 is a schematic view showing an embodiment of a second detection means which is an embodiment of the present invention;
3 is a schematic diagram showing an embodiment of a sensing unit which is an embodiment of the present invention;
4 is a view showing an embodiment of a vibration sensor which is an embodiment of the present invention.
5 is a diagram showing an embodiment of a signal generating section which is a constitution of the present invention.
6 is a view showing an embodiment of a water leakage detection system according to the present invention.

In describing the present invention, terms and words used in the present specification and claims are to be construed in accordance with the principles of the present invention, on the basis that the inventor can properly define the concept of a term in order to best explain his invention It should be construed as meaning and concept consistent with the technical idea of.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view showing an embodiment of a leak detection system for a pipeline embedded in the ground according to the present invention, FIG. 2 is a schematic view showing an embodiment of a second detection means, which is a constitution of the present invention, Fig. 2 is a schematic view showing an embodiment of a sensing unit which is an embodiment of the present invention. 5 is a view showing an embodiment of a signal generating section which is a constitution of the present invention, and Fig. 6 is a diagram showing a leakage current according to the present invention 1 is a diagram showing an embodiment of a detection system.

The water leakage detection system of the pipeline embedded in the ground according to the present invention is applicable to the pipeline P or the newly installed pipeline P and can be easily applied to the first detection means 10) are provided to detect the leaked suspicious sections of the leaked water, and the second detection means (20) arranged in more detail than the first detection means (10) along the pipeline (P) The leakage point is detected through the leakage check, and more efficient and accurate leakage diagnosis and immediate repair work are performed.

At this time, the water leakage detection system of the pipeline embedded in the ground is constructed such that the first detection means 10 and the second detection means 20 are embedded by piercing the ground along the pipeline embedded in the pipeline, However, since the second detection means 20 is provided in the form of one module, it is easy to embed.

As shown in FIG. 1, the water leakage detection system of the pipeline embedded in the ground according to the present invention includes a first detection unit 10, a second detection unit 20, and a central server 40 do.

As shown in the figure, the first detection means 10 is arranged for every predetermined interval of the pipeline P buried in the ground to measure the flow rate of the pipeline P to generate the first detection signal.

The flow meter 10a is configured to measure a first detection signal, which is a flow rate value of the channel P at a point where the flow meter 10a is installed, for example, as the first detection means 10, And the flow meter 10a are monitored, and the leakage interval is selected for the interval in which the flow rate difference is remarkable.

The first detection signal measured by the flow meter 10a is configured to communicate with the central server 40 to transmit the first detection signal.

A plurality of second detection means 20 are installed along the pipeline P and one or more detection sensors 10 are disposed between the pair of first detection means 10 to detect information about the pipeline P and the pipeline P And generates a second detection signal which is a measured value.

The second detection unit 20 may be configured to take one module type in which the sensing unit 100 and the RFID unit 200 are combined as shown in FIG.

3, the storage unit 120 includes a temperature sensor 110a, a humidity sensor 110b, a pressure sensor 110c, a vibration sensor 110b, Sensor 110d.

The storage unit 120 stores a unique code assigned to each sensing module 1 and stores at least one of the temperature sensor 110a, the humidity sensor 110b, the pressure sensor 110c, and the vibration sensor 110d And transmits the stored sensing information to the intermediate processing unit 2, which will be described later.

The sensing unit 100 measures information on the peripheries P and the peripheries P through the temperature sensor 110a, the humidity sensor 110b, the pressure sensor 110c and the vibration sensor 110d, And generates a second detection signal that is a sensing value that can be discriminated.

The sensing unit 100 is a means for directly detecting the leakage of the pipeline P. At least one second detection unit 20 is disposed between the first detection units 10, It is preferable that a plurality of second detection means 20 are disposed between one flow meter 10a and another flow meter 10a adjacent to the flow meter 10a in order to more precisely detect leakage and leak positions.

The sensing unit 100 may be installed on one side of the outer circumference of the conduit P or inside the conduit P or on a joint of the conduit P to measure the temperature and humidity around the conduit P, The pressure of the fluid flowing in the pipe P or the vibration generated in the pipe P by the flowing fluid is measured to generate the second detection signal.

Also, the RFID unit 200 takes a form of a module combined with the sensing unit 100 and is disposed above the point where the sensing unit 100 is installed. Preferably, the RFID unit 200 is configured to be exposed to the ground .

The RFID unit 200 is disposed in a one-to-one correspondence with the sensing unit 100. The RFID unit 200 stores pipeline information of a corresponding channel P provided with the sensing unit 100 and communicates with a separate portable reader 22a via a radio wave .

Here, the pipeline information refers to unique information such as a date of burial of a relevant pipeline (P), a buried depth, a buried position, a buried direction, a material, a diameter, and production information. P) for quick repair and replacement work.

The portable reader 22a is configured to receive the pipeline information of the pipeline P from the RFID unit 200. The position information and pipeline information of the pipeline P received by the portable reader 22a are received by the center To the server (40).

At this time, the reason why the RFID unit 200 is disposed on the ground is to provide a smooth communication environment with the portable reader 22a.

The second detection unit 20 detects that the second detection signal and corresponding channel information are transmitted to the central server 40 at the same time that the sensing unit 100 and the RFID unit 200 are configured in units of one module So that efficient management can be achieved.

The relay station 30 is arranged for each predetermined section of the channel P and is configured to receive the second detection signal from the sensing unit 100 of the corresponding section and transmit the second detection signal to the central server 40.

1, the relay station 30 may be connected to the sensing unit 100 and the RFID unit 200 by wire (not shown), and may supply power to each of the sensing units 100 and the RFID unit 200 through a wire, The second detection signal of the RFID unit 100 and the channel information of the RFID unit 200 may be transmitted to the relay station 30 via the wire.

In this case, since the RFID unit 200 is supplied with power, the channel information may be transmitted to the relay station 30 through radio waves without passing through the portable reader 22a as shown in FIG.

6, the relay station 30 receives a unique code, a second detection signal, and channel information from the sensing unit 100 and the RFID unit 200, and transmits the unique code, the second detection signal, and channel information to the central server 40 And a power supply unit (32) for supplying power to the first detection unit (31) and the second detection unit (20).

The central server 40 collects the flow rate values from the flow meter 10a, which is one embodiment of the first detection means 10, and when there is a significant difference in the flow rate values, the leak suspicious sections are primarily selected, The second detection signals of the second detection means 20 arranged in the suspicious section are finely analyzed to determine whether or not the leak is detected. When the leak is detected, the accurate leakage point can be grasped through the inherent code of the transmission section.

Thereafter, the manager receives the radio waves from the RFID module at the leak point via the portable reader 22a, acquires the channel information of the channel P, and transmits the channel information to the central server 40, or even if there is no portable reader 22a (The position of the pipe and the depth of the pipe, the buried position, the direction of the buried material, the material of the pipe, etc.) of the pipe P in which the water leakage is generated by communicating with the central server via the communication between the RFID unit 200 and the relay station 30, Diameter, production information, etc.) are grasped and the repair work can be performed on the basis thereof.

Hereinafter, a specific embodiment of the sensing unit 100, which is an embodiment of the present invention, will be described in detail with reference to FIG.

One or more of the temperature sensor 110a, the humidity sensor 110b, the pressure sensor 110c and the vibration sensor 110d are connected to the sensing unit 100. The conduit P and the conduit P, A second detection signal which is a value obtained by measuring the surrounding information, that is, the temperature and humidity of the soil around the pipeline P, the pressure of the fluid flowing in the pipeline P, and the vibration signal generated by the flow of the fluid, do

6) when the temperature sensor 110a is connected to the sensing unit 100 so that when the water leakage occurs in the pipeline P, It is possible to detect that leakage occurs when the temperature value is lower than the second detection signal of the neighboring sensing unit.

When the humidity sensor 110b is connected to the sensing unit 100, it is arranged in the surrounding soil of the pipeline P (see FIG. 6) in the same manner as the temperature sensor 110a, It is possible to detect that leakage occurs when the humidity value becomes higher than the second detection signal of the neighboring sensing unit 100 because the humidity becomes higher.

At this time, it is preferable to simultaneously apply the temperature sensor 110a and the humidity sensor 110b to the sensing unit 100. This is because when the leakage of water occurs in the specific channel P, The central server 40 can detect that the leakage of the pipeline P occurs more accurately. If only the temperature sensor 110a is applied, if the temperature of the soil is lowered due to reasons other than leakage, In order to compensate for this, it is possible to compare the temperature and humidity sensing values together. As a result, even if the temperature drops, it can be confirmed that there is no leakage when there is no change in the humidity value. .

Also, when the temperature and humidity values of a certain region are changed due to rain or the like because the sensing unit 100 is distributed along the channel P, it is compared with the second detection signal variation amount of the peripheral sensing unit 100, So that it can not be misunderstood.

When the pressure sensor 110c is connected to the sensing unit 100, the pressure sensor 110c is installed inside the conduit P (refer to FIG. 6). When the fluid flows in the conduit P, It is possible to detect the leakage of the fluid through the difference between the fluid pressure of the other section and the fluid pressure of the other section because if the fluid pressure in one section is lower than the pressure in the other section, .

When the vibration sensor 110d is connected to the sensing unit 100, the vibration sensor 110d is attached to the outer surface of one side of the conduit P (refer to FIG. 6) It is possible to grasp the leakage through the generated vibration.

Specifically, the vibration sensor 110d includes a body 110d-1, a weight 110d-2, and a signal generator 110d-3 as shown in FIG.

A space portion 110d-12 provided in a watertight manner is formed inside the main body 110d-1 and a pressing projection 110d-11 protrudes upward from a bottom surface of the space portion 110d-12 .

Although the main body 110d-1 is not shown to be attached to the pipeline P, the magnetic body is provided on the bottom surface of the main body 110d-1, So that it can be easily attached without additional configuration.

In addition, a cover (not shown) may be fastened to an upper portion of the main body 110d-1 so that the inner space portion 110d-12 may have a watertight structure.

The weight 110d-2 is spaced upward from the inner bottom surface of the body in the space 110d-12, and a pressing end 110d-22 protrudes from the bottom.

The upper surface of the signal generating portion 110d-3 is in close contact with the pressing end 110d-22 and the lower surface of the signal generating portion 110d-3 is in close contact with the pressing protrusion 110d-11. To the second detection signal.

5, the signal generating unit 110d-3 includes a socket 110d-31, a piezoelectric element 110d-33, a first board 110d-3, -34), and a second board 110d-35.

The socket 110d-31 has a hollow 110d-32 at its center, and the piezoelectric element 110d-33 is disposed at the hollow 110d-32.

The upper surface of the first board 110d-34 is fixed to the upper surface of the socket 110d-31 so that the upper surface of the first board 110d-34 is in close contact with the pressing terminal 110d-22, So as to generate a first signal.

The second board 110d-35 is fixed to the lower surface of the socket so that the lower surface of the second board 110d-35 closely contacts with the pressing protrusion and the upper surface of the second board 110d-35 closely contacts with the lower end of the piezoelectric element 110d- do.

The vibration pressure generated by the vibration of the weight 110d-2 is transmitted to the piezoelectric element 110d-33 through the first board 110d-34, and the vibration of the main body 110d-1 Is transmitted to the piezoelectric element 110d-33 through the second board 110d-35 so that the vibration of the upper board 110d-34 is transmitted to the first board 110d- The second board 110d-35 generates a first signal which is a second detection signal generated from the piezoelectric element 110d-33, and the second board 110d-35 is generated from the piezoelectric element 110d-33 to which the lower vibration pressure is transferred And the generated first and second signals are transmitted to the relay station 30. The first and second signals are transmitted to the relay station 30. [

For example, the central server 40 may collect the first signal and the second signal to calculate and compare the average value of the signals, collect the first signal and the second signal, By selecting a signal having a small deviation of the value, it is possible to precisely diagnose whether or not the leak is present through the second stable detection signal.

The vibration sensor 110d is connected to the sensing unit 100 for detecting water leakage as described above so that a plurality of second detection units 20 are installed at a predetermined interval in the pipe P, By measuring the second detection signal, which is a vibration signal of the fluid flowing inside, a vibration signal of a certain frequency band is generated by the pressure when the fluid flows into the conduit P, that is, when no fluid flows in the conduit P The vibration signal is not generated and the magnitude of the vibration signal changes according to the amount of flow when the fluid flows. Therefore, if the pipeline P leaks due to cracks or the like, There is a difference in the amount of fluid flowing after the vibration, and the vibration signal also changes.

Therefore, when the vibration signal of the pipeline P is measured at any time, it is possible to detect whether or not the pipeline P leaks.

Piezoelectric, Piezo ceramic, Piezo quartz, or the like can be used as these piezoelectric elements. Since these piezoelectric elements are high in accuracy and relatively low in cost, ) It is possible to make installation cost not burden even if it is installed in plural in the network.

3, the outer peripheral coating layer 110d-24 may be formed on the outer circumferential surface of the weight 110d-2. This is because the sensing portion according to the present invention is embedded in the ground, When the weight 110d-2 is wet or condensation is generated, the vibration movement may be adversely affected, and an error may occur in the second detection signal.

Accordingly, the outer circumferential coating layer 110d-24 may be formed on the outer circumferential surface of the weight 110d-2 to generate a more accurate second detection signal. The outer circumferential coating layer 110d-24 may be formed of polyacrylic acid 10 to 20 parts by weight of a cerium oxide powder, 1 to 5 parts by weight of manganese oxide, 0.5 to 3 parts by weight of cellulose acetate, and 1 to 5 parts by weight of calcium nitrite based on 100 parts by weight of the resin.

As a main material, a polyacrylic resin is used, which is to add water to the outer coating layer 110d-24 as a water-soluble binder to prevent the occurrence of condensation.

The sericite serves to reinforce the strength of the outer coating layer 110d-24 as a filler. In particular, the sericite prevents the occurrence of condensation of the outer coating layer 110d-24 as a hydrophilic mineral, So that vibration can be performed.

In addition, cellulose acetate is added to the outer coating layer 110d-24. The cellulose acetate is added as a hydrophilizing agent to control the scale generation by the weight 110d-2 by hydrophilization.

On the other hand, even if hydrophilic property is imparted by adding cellulose acetate to the polymer, the scale of the foreign substance on the surface of the weight 110d-2 can not be controlled. Generally, colloidal materials such as EPS, protein, and the like have a weak negative charge due to the selective adsorption of anions, especially hydroxide ions, in the medium, so that manganese oxide is further added to the outer coating layer 110d-24. The manganese oxide exhibits a negative charge at a pH of 6 to 8 to generate sludge and repulsive force, so that the generation of scale due to sludge can be controlled.

The above-mentioned calcium nitrite is intended to improve the anti-rust property and to prevent the scale 110d-2 from depositing scale due to corrosion. And acts to protect the outer peripheral coating layer 110d-24 from corrosion without adversely affecting the strength of the outer peripheral coating layer 110d-24. Thus, the anti-rusting effect of preventing the corrosion of the metal weight weight 110d-2 is achieved even if a relatively small amount is used .

This small nitrite ion (NO2-) of the calcium nitrite reacts with the iron ion (Fe ++) eluted from iron (Fe) to prevent the formation of ferric hydroxide [Fe (OH) 3] The compound Fe2O3 is produced. The resulting Fe2O3 forms a film at a corrosion point formed on the surface of the weight 110d-2 and closes it, thereby preventing corrosion of the weight 110d-2.

Hereinafter, an embodiment of the second detection means 20 according to the present invention will be described with reference to FIG.

The second detecting means 20 can be connected to the communication unit 31 and the power supply unit 32 of the relay station 30 through the cable 33. The sensing unit 20 can be connected to the sensing unit 20 via the cable 33, The second detection signal of the control unit 100 is transmitted to the relay station 30 and the power is supplied from the power supply unit 32 of the relay station 30 to the second detection unit 20. [

The second detection unit 20 is configured to receive power from the power supply unit 32 of the relay station 30 so that the power can be supplied to the RFID unit 200 at all times, The replacement becomes unnecessary, and semi-permanent use becomes possible.

In addition, since the RFID unit 200 is powered by the cable 33 as described above, the communication environment with the portable reader 22a or the relay station 30 can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

P: channel 10: first detection means
20: second detection means 30:
40: central server

Claims (6)

First detecting means provided for each predetermined section of the pipeline buried in the ground; Second detection means for generating a second detection signal, which is a plurality of detection signals provided along the pipeline, one or more of which are disposed between a pair of first detection means and which are measured values of pipeline and pipeline periphery information; And a second sensing means for sensing a leaked leaked portion from the first detection means and a leakage detection means for detecting a leaked leaked portion and a leakage leaked position through the second detection means with respect to the selected leakage leaked portion, A water leakage detection system for a pipeline embedded in the earth including a central server,
Wherein the second detection unit generates a second detection signal, which is a value obtained by measuring a channel and a channel circumference information, and is connected to at least one of a temperature sensor, a humidity sensor, a pressure sensor, and a vibration sensor; And an RFID unit connected to the sensing unit and disposed so as to be exposed on the ground of a point where the sensing unit is installed, and storing pipeline information of the pipeline,
Wherein the pressure sensor is a watertight structure having a space formed on an inner side thereof and a pressing protrusion formed on an inner bottom surface thereof and attached to the duct; A weight being spaced upward from an inner bottom surface of the body in the space portion and having a pressing end protruded from the bottom surface and having an outer peripheral coating layer formed on an outer peripheral surface thereof; And a signal generator which is disposed in close contact with the pressing protrusions and which converts the vibration signal of the weight to a second detection signal and transmits the second detection signal to the storage unit,
Wherein the outer coating layer comprises 10 to 20 parts by weight of cericite powder, 1 to 5 parts by weight of manganese oxide, 0.5 to 3 parts by weight of cellulose acetate, and 1 to 5 parts by weight of calcium nitrite, based on 100 parts by weight of the polyacrylic acid resin A leak detection system for pipelines embedded in the ground.
The method according to claim 1,
A flow meter is applied to the first detection means,
Wherein the flow meter is configured to measure a flow rate value of the pipe at a point where the flow meter is installed.
delete The method according to claim 1,
The sensing unit
And a storage unit for collecting and storing a unique code assigned to each sensing unit and a second detection signal generated through at least one of the temperature sensor, the humidity sensor, the pressure sensor, and the vibration sensor. Water leakage detection system for pipeline.
5. The method of claim 4,
The second detection means is connected to the relay station,
The relay station
A communication unit receiving the second detection signal and the unique code from the storage unit and transmitting the second detection signal and the unique code to the central server;
A power supply unit for supplying power to the second detection unit;
And a water leakage detection system for detecting the water leakage of the embedded pipe.

delete

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