WO2018105764A1

WO2018105764A1 - System for detecting leakage of water in conduit line installed underground

Info

Publication number: WO2018105764A1
Application number: PCT/KR2016/014212
Authority: WO
Inventors: 안경수; 조선남
Original assignee: 안경수
Priority date: 2016-12-06
Filing date: 2016-12-06
Publication date: 2018-06-14

Abstract

The present invention relates to a system for detecting a water leakage and, more specifically, to a system for detecting a leakage of water in a buried conduit line wherein the system selects, firstly, a section suspected of having a water leakage through a first detection means and performs, secondly, an intensive water leakage detection for the section suspected of having a water leakage, by a second detection means, and thus improve precision of the system for detecting a water leakage so as to allow execution of immediate maintenance work and enable efficient system operation.

Description

Leakage Detection System of Underground Pipeline

The present invention relates to a leak detection system, and more particularly, a first detection means is installed at every predetermined section of a pipeline, and the leak detection section is primarily selected, and secondly, the second detection means concentrates on the leak detection section. The present invention relates to a leak detection system for underground pipelines, which is constructed to identify leak points through inspection of leaks and to enable more efficient and accurate leak diagnosis and immediate repair work.

Water supply network management is one of the most basic and important aspects of tap water (drinking water) management in a situation where demand and supply imbalances are intensified due to increased rainfall bias due to climate change and increased water use due to population growth and urbanization. One.

In general, the water supply network accounts for a high proportion of water supply facilities of about 70%, but due to lack of maintenance, the aging of pipelines is accelerating. In Korea, the annual leakage loss in the process of water supply was 6.4 billion ㎥ (2.1 times of Namgang Dam's water storage as of 2010), and the amount of leakage lost in the last 10 years was 7.5 billion ㎥.

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

In addition, for pipe networks installed for the purpose of supplying gas and oil, leakage management is essential not only to reduce the loss but also to prevent large accidents.

In order to detect such leaks, various techniques are conventionally proposed. In particular, in the case of a water pipe, a leak sensor of Korean Patent Publication No. 10-2007-0005234 has been presented, but this is a film that can display the chemical components. It is configured to detect the leakage of chemicals by winding the pipes, etc. In this case, the installation cost and construction period is excessive to apply to a wide range of water supply network, and it is difficult to accurately detect the leak point Will remain.

Accordingly, the present invention has been invented to solve the above-mentioned problems, and when leak detection is detected in a large-scale network, the leakage core section is firstly selected and the leakage precision diagnosis is performed on the leakage core section. In order to provide efficient and accurate leak detection, it is to provide a leak detection system of underground pipelines that can be easily applied to the existing pipelines.

According to the present invention for solving the above problems, the leak detection system of the underground pipe line is provided with a first detection means installed for each section of the underground pipe line; At least one second detection means installed between each of the first detection means and generating a second detection signal which is a value obtained by measuring information about a pipeline and surroundings of the pipeline; Whether the leak is communicated with the first detecting means and the second detecting means, and the leak detection core section is first selected from the first detecting means, and the leak is detected through the second detection signal of the second detecting means for the selected leaking detection period; It is characterized in that it includes; a central server for identifying the leak location.

At this time, a flow meter is applied to the first detection means, the flow meter is characterized in that it is configured to measure the flow rate of the fluid passing through the pipe at the installed point to the central server.

In addition, the second detection means may include a sensing unit for generating a second detection signal which is a value measuring the pipeline and the information around the pipeline; And an RFID unit connected to the sensing unit and disposed to be exposed to the ground of the point where the sensing unit is installed, and storing the pipe information of the corresponding pipe line.

As an example, the sensing unit and the RFID unit may be integrally coupled to take one module form.

Meanwhile, the sensing unit is connected to at least one of a temperature sensor, a humidity sensor, a pressure sensor, a vibration sensor, and a noise sensor, and a unique code assigned to each sensing unit and the temperature sensor, humidity sensor, pressure sensor, vibration sensor, and noise sensor. It characterized in that it comprises a storage unit for collecting and storing the second detection signal generated through one or more of.

In addition, the second detection means is connected to the relay station, the relay station receives a second detection signal and a unique code from the storage unit for transmitting to the central server; And a power supply unit for supplying power to the second detection means.

As one example, the pressure sensor is a watertight structure, the space portion is formed on the inside and the pressing projection is formed on the inner bottom surface is attached to the pipeline; A weight that is spaced upward from the inner bottom surface of the main body in the space and a pressing end protrudes from the bottom; The upper surface is in close contact with the pressing end and the lower surface is placed in close contact with the pressing projection signal generating unit for converting the vibration signal of the weight to the second detection signal to transmit to the storage unit.

At this time, the signal generation unit is a socket in which a hollow is formed in the center; A piezoelectric element disposed in the hollow; A first board fixed to an upper surface of the socket, the upper surface of which is in close contact with the pressing end, and the lower surface of which is in close contact with an upper end of the piezoelectric element to generate a first signal; And a second board fixed to the bottom surface of the assembly socket, the bottom surface being in close contact with the pressing protrusion, and the top surface being in close contact with the bottom of the piezoelectric element to generate a second signal.

On the other hand, the temperature sensor further comprises a housing surrounding the outside, the housing is 5 to 10 parts by weight of alumina, 5 to 10 parts by weight of sericite, 1 to 3 parts by weight of manganese oxide, cellulose acetate based on 100 parts by weight of silicon nitride It is characterized by including 0.5 to 2 parts by weight, calcium nitrite 1 to 5 parts by weight, manganese sulfide 1 to 3 parts by weight.

As described above, the leak detection system of the pipeline embedded in the ground according to the present invention primarily selects the leak suspected section through the first detecting means, and detects the concentrated leak of the second detecting means secondly in the leak suspected interval. Improving the accuracy of the leak detection system can be carried out immediately to perform the maintenance work, and by applying the second detection means to a single module has the advantage that it is easy to apply to the buried pipeline.

1 is a schematic view showing an embodiment of a leak detection system of a pipeline embedded in the ground according to the present invention.

Figure 2 is a schematic diagram showing an embodiment of a second detection means of one configuration of the present invention.

Figure 3 is a schematic diagram showing an embodiment of a sensing unit of one configuration of the present invention.

Figure 4 is a view showing an embodiment of a vibration sensor of one configuration of the present invention.

5 is a diagram illustrating an embodiment of a signal generator that is one component of the present invention;

6 is a view showing an embodiment of a leak detection system according to the present invention.

In describing the present invention, the term or word used in the present specification and claims is based on the principle that the inventor can appropriately define the concept of the term in order to best describe the invention of his or her own. It should be interpreted as meanings and concepts corresponding to the technical idea of

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

1 is a schematic diagram showing an embodiment of a leak detection system of a pipeline embedded in the ground according to the present invention, Figure 2 is a schematic diagram showing an embodiment of a second detection means of one configuration of the present invention, Figure 3 It is a schematic diagram which shows one Example of the sensing part which is one structure of this invention. And, Figure 4 is a view showing an embodiment of a vibration sensor of one configuration of the present invention, Figure 5 is a view showing an embodiment of a signal generation unit of one configuration of the present invention, Figure 6 is a leak according to the present invention 1 is a diagram illustrating an embodiment of a detection system.

The leak detection system of the underground pipe line according to the present invention can be easily applied to a pre-embedded pipe line (P) or a newly buried pipe line (P), the first detection means (for each predetermined section of the pipe line (P) 10) is installed to primarily screen the leak core section, and the second detection means 20 is more precisely disposed than the first detection means 10 along the pipeline P with respect to the leak core section. It is characterized in that it is configured to carry out more efficient and precise leak diagnosis and immediate repair work by identifying leaks and leak points through leak check.

In this case, the pipeline in the entire specification is a concept including both various sewage and sewage pipe networks and oil pipes buried in the ground, the material of the pipeline includes a metal material as well as polyethylene (PE), polypropylene (PP), Synthetic resin material such as polystyrene (PS) can be formed into a tubular shape through which the inside is penetrated through high temperature / high pressure extrusion process, and all fluids (F) including constant, sewage, gas, oil, etc. pass through the inside thereof. That is configured to

In addition, in the present specification, the leakage of water is included in the concept of leakage, and includes not only the leakage occurring in the water and sewage pipe but also the concept of leakage occurring in the oil pipe.

The leak detection system according to the present invention is characterized in that it comprises a first detection means 10, the second detection means 20 and the central server 40 as shown in FIG.

As shown, the first detection means 10 is configured to generate a first detection signal which is disposed at a predetermined interval of the pipeline P embedded in the ground and is a flow value passing through the pipeline P.

As the first detection means 10, for example, a flow meter 10a may be applied, and the flow meter 10a is configured to measure a first detection signal which is a flow rate value of a pipe line P at an installed point. In addition, by monitoring the flow rate difference between the flow meter (10a), the core section of the leak, which is a section where the difference in flow rate is remarkable, is selected first.

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.

In this case, as the communication means, various conventional techniques using wired or wireless are applicable, and a detailed description thereof will be omitted.

A plurality of second detection means 20 are installed along the pipe P, and at least one of the second detection means 20 is disposed between a pair of the first detection means 10 to provide information about the pipe P and the pipe P. And generate a second detection signal that is a measured value.

As shown in FIG. 2, the second detecting means 20 includes a sensing unit 100 and an RFID unit 200, and includes a sensing unit 100 and an RFID unit for ease of embedding and construction. 200 may be configured to take the form of one module combined.

First, the sensing unit 100 includes a storage unit 120 as shown in FIG. 3, and the storage unit 120 includes a temperature sensor 110a, a humidity sensor 110b, a pressure sensor 110c, and vibration. It is connected to at least one of the sensor 110d and the noise sensor 110e.

In addition, the storage unit 120 stores a unique code assigned to each sensing module 1 to determine its position and the temperature sensor 110a, humidity sensor 110b, pressure sensor 110c, vibration sensor ( 110d) collects and stores sensing information generated through at least one of the noise sensor 110e and transmits the stored sensing information to the following relay station 30.

The sensing unit 100 is a pipe (P) and pipe (P) peripheral information through the temperature sensor (110a), humidity sensor (110b), pressure sensor (110c), vibration sensor (110d) and noise sensor (110e) It is configured to generate a second detection signal which is a sensing value that can determine whether or not by measuring the leakage.

The sensing unit 100 is a means for accurately detecting the leakage of the pipeline (P), at least one second detection means 20 is disposed between the first detection means 10, In order to detect the leak in more detail and the leak position, it is preferable that a plurality of second detection means 20 is disposed between one flow meter 10a and another neighboring flow meter 10a.

At this time, the sensing unit 100 is installed on one side of the outer periphery of the pipe P, the inside of the pipe P, or the joint of the pipe P, and the like to measure the temperature, humidity, etc. around the pipe P, or (P) It is configured to measure the vibration and noise generated in the pipeline P by the pressure of the fluid flowing inside or the flowing fluid to generate the second detection signal.

On the other hand, the RFID unit 200 may be configured to take the form of a module combined with the sensing unit 100 and is disposed above the point where the sensing unit 100 is installed.

The RFID unit 200 is disposed in a one-to-one correspondence with the sensing unit 100 to store pipeline information of a corresponding pipeline P in which the sensing unit 100 is installed, and as shown in FIG. 1, a portable reader on the ground ( 22a) and may be configured to communicate with the relay station 30 in some cases.

At this time, the RFID unit 200 may be configured to be exposed to the ground as shown in the figure for smooth communication with the portable reader 22a and the relay station 30 on the ground.

Here, the pipeline information refers to unique information such as the date of embedding, the embedding authority, the depth of embedding, the location of embedding, the direction of embedding, the material, the diameter, and the production information of the corresponding pipeline (P). Refers to various information for the purpose of prompt repair and replacement of P).

In addition, the portable reader (22a) is configured to receive the pipeline information of the corresponding pipeline (P) from the RFID unit 200, the position information and the pipeline information of the pipeline (P) received by the portable reader (22a) Configured to deliver to server 40.

On the other hand, the second detection means 20 is the sensing unit 100 and the RFID unit 200 is configured as a single module unit, the second detection signal and the corresponding pipeline information is transmitted to the central server 40 at the same time As a result, efficient management can be achieved.

The relay station 30 is arranged one by one for each section of the pipeline P, and is configured to receive a second detection signal from the sensing unit 100 of the section and transmit the second detection signal to the central server 40.

The relay station 30 is connected to the sensing unit 100 and the RFID unit 200 by a wire (not shown) as shown in Figure 1 can supply power to each of the wires, and also the sensing unit The second detection signal of 100 and the pipeline information of the RFID unit 200 may be configured to be transmitted to the relay station 30 through a wire.

At this time, since the RFID unit 200 is supplied with power, it may be configured that the pipeline information is transmitted to the relay station 30 through radio waves without passing through the portable reader 22a as shown in FIG. 1.

Meanwhile, the relay station 30 receives a unique code, a second detection signal and pipeline information from the sensing unit 100 and the RFID unit 200 and transmits the information to the central server 40 as shown in FIG. 6. And a power supply unit 32 for supplying power to the second detection means 20.

The central server 40 collects a flow rate value from the flow meter 10a which is an embodiment of each of the first detection means 10, and when the difference between the flow rate values is noticeable, the core section of the leak is primarily selected. By accurately analyzing the second detection signal of the second detection means 20 arranged in the suspect section to determine whether the leak, and if the leak is detected through the unique code of the sensing unit 100 to determine the exact leak point Will be.

Thereafter, the manager receives the radio wave from the RFID module of the leak point through the portable reader 22a to obtain the pipeline information of the corresponding pipeline P and transmit it to the central server 40 or even without the portable reader 22a. By transmitting to the central server through the communication between the RFID unit 200 and the relay station 30, specific information of the pipeline (P) where the leak occurred (position of the pipeline and the depth of embedding, embedding position, embedding direction, material, Diameter, production information, etc.) can be identified and quickly repaired.

Hereinafter, various embodiments of the sensing unit 100 which is one configuration of the present invention will be described in detail with reference to FIG. 3.

One or more of the temperature sensor 110a, the humidity sensor 110b, the pressure sensor 110c, the vibration sensor 110d, and the noise sensor 110e are connected to the sensing unit 100. ) And the information around the pipeline (P), that is, the temperature and humidity of the soil around the pipeline (P), and the vibration and noise generated by the flow and pressure of the fluid flowing through the pipeline (P). Configured to generate two detection signals

First, when the temperature sensor 110a is connected to the sensing unit 100, it is configured to be disposed on the surrounding soil of the pipeline P (see FIGS. 3 and 6), and when the leakage occurs in the pipeline P, the surrounding soil Since the temperature of the leak point is lowered, when the temperature value is lower than the second detection signal of the neighboring sensing unit 100, the leak may be detected.

In addition, when the humidity sensor (110b) is connected to the sensing unit 100 is configured to be disposed in the surrounding soil of the pipeline (P) like the temperature sensor (110a) (see Figs. 3 and 6) than when the leakage occurs Since the humidity of the leak point is increased, when the humidity value is higher than the second detection signal of the neighboring sensing unit 100, the leak may be detected.

In this case, it is preferable to simultaneously connect the temperature sensor 110a and the humidity sensor 110b to the sensing unit 100, which is based on a decrease in soil temperature and an increase in humidity when leakage occurs in a specific pipe P. The central server 40 can more accurately detect the leakage of the pipeline (P), if the temperature sensor 110a is applied only if the soil temperature is lowered for reasons other than the leak of the pipeline (P) In order to compensate for this, the temperature and humidity sensing values can be compared together to compensate for the leakage. Therefore, even if the temperature is lowered, it can be confirmed that no leakage occurs when the humidity is not changed. It will be possible.

In addition, since the sensing unit 100 is distributed along the pipe line P, even when temperature and humidity values of a predetermined region change due to rain or the like, the sensing unit 100 compares the change amount of the second detection signal of the surrounding sensing unit 100 to prevent leakage. You will not be mistaken for an occurrence.

Meanwhile, according to an embodiment of the present invention, although the temperature sensor 110a is not shown in the drawing, an example in which a housing surrounding the temperature sensor 11 is further configured is provided. The reason for constituting the housing is to solve the problem of lowering the accuracy of the entire system by failing to derive an accurate temperature value when the temperature sensor 11 is exposed to external shock, heat, and the like.

The housing is 5 to 10 parts by weight of alumina powder, 5 to 10 parts by weight of sericite, 1 to 3 parts by weight of manganese oxide, 0.5 to 2 parts by weight of cellulose acetate, 1 to 5 parts by weight of calcium nitrite, based on 100 parts by weight of silicon nitride, Manganese sulfide is characterized by including 1 to 3 parts by weight.

The silicon nitride (Si3N4) is excellent in thermal shock resistance and thermal conductivity, so that the temperature sensor 11 is protected from an external impact, etc. by using this as a theme, and excellent thermal conductivity to facilitate accurate temperature sensing.

The alumina powder is to function as a sintering agent.

On the other hand, the housing may be scale, cracks, etc. due to external moisture, impact, etc. This defect acts as a factor that interferes with accurate temperature detection by inhibiting uniform heat transfer from the housing to the temperature sensor 11. Accordingly, the present invention proposes a composition for controlling such defects.

The sericite is used to reinforce the strength of the housing as a filler, and in particular, to prevent condensation of the housing as a hydrophilic mineral to prevent condensation of the housing. Temperature) to prevent the transfer.

In addition, a cellulose acetate is added to the housing, and the cellulose acetate is added as a hydrophilic agent to control the generation of scale in the housing by hydrophilization.

On the other hand, even if hydrophilicity is imparted by adding cellulose acetate, it is not possible to control scale due to foreign substances on the surface of the housing.

In general, the colloidal material EPS, protein, etc. as the other material has a weak negative charge by the selective adsorption of anions, particularly hydroxide ions in the medium, so that the manganese oxide is added to the housing. The manganese oxide exhibits a negative charge at a pH of 6 to 8 to generate sludge and repulsive force, thereby controlling the generation of scale by sludge.

The calcium nitrite is to improve the rust resistance to prevent the deposition of scale due to corrosion in the housing. It serves to protect against corrosion without affecting the strength or the like of the housing, and to prevent corrosion of the housing of metal material even when a relatively small amount is used.

The mechanism of action of calcium nitrite is stable while nitrite ions (NO2-) react with iron ions (Fe ++) eluted from iron (Fe) to block the formation of ferric hydroxide [Fe (OH) 3], a rust component. The compound Fe2O3 will be produced. The Fe 2 O 3 thus formed forms a coating at the corrosion point formed on the surface of the housing and closes it, thereby preventing the corrosion of the housing from progressing.

The manganese sulfide (MnS) is intended to prevent the inflow of water and the like by generating voids in the housing surface. The surface voids are due to the formation of voids and cracks on the surface as hydrogen is released to the outside of the paste tissue during the curing process when the hydrogen component is supersaturated by the reaction of alkali components and metal components to generate hydrogen gas. The surface voids thus generated may act as a point of occurrence such as corrosion and scale, and may have a problem of acting as a point of non-uniform heat transfer. Therefore, in the present invention, manganese sulfide is added to the manganese sulfide, which is to fix hydrogen to fix hydrogen by manganese sulfide to control the generation of micropores on the surface.

On the other hand, when the pressure sensor (110c) is connected to the sensing unit 100, the pressure sensor (110c) is installed in the pipe (P) (see Figures 3 and 6) and the flow of fluid in the pipe (P) Leakage can be detected by the difference between the fluid pressure in one section and the fluid pressure in the other section, which means that if the fluid pressure in one section is lower than the pressure in the other section, the leak in the corresponding pipe (P) is one section. It is possible to determine whether or not.

In addition, when the vibration sensor 110d is connected to the sensing unit 100, the vibration sensor 110d is attached to one outer surface of the pipe line P (see FIGS. 3 and 6) and flows inside the pipe line P. The vibration generated by the fluid can determine whether the leak.

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

A space portion 110d-12 having a watertight structure is formed inside the main body 110d-1, and a pressure protrusion 110d-11 protrudes upward from the bottom surface of the space portion 110d-12. .

The main body 110d-1 is not shown to be attached to the conduit P, but a magnetic material is provided on the bottom surface of the main body 110d-1, so that the outer surface of the main body 110d-1 is generally separated from the conduit P made of steel. It can be configured to be easily attached without additional configuration of.

In addition, the cover (not shown) is fastened to the upper portion of the main body (110d-1) can be configured to form a watertight structure of the inner space portion (110d-12).

The weight 110d-2 is spaced apart from the inner bottom surface of the main body in the space portion 110d-12, and is configured such that the pressing end 110d-22 protrudes from the bottom surface thereof.

On the other hand, the signal generating unit (110d-3) is the upper surface is in close contact with the pressing end (110d-22) and the lower surface is arranged in close contact with the pressing projection (110d-11) fluid flowing through the pipe (P) inside And convert the vibration signal generated by the flow of the signal into the second detection signal.

Referring to FIG. 5 as an embodiment of the signal generator 110d-3, the signal generator 110d-3 includes a socket 110d-31, a piezoelectric element 110d-33, and a first board 110d. -34), and may comprise a second board (110d-35).

The sockets 110d-31 have hollows 110d-32 formed in the center thereof, and piezoelectric elements 110d-33 are disposed in the hollows 110d-32.

At this time, the first board (110d-34) is fixed to the upper surface of the socket (110d-31) so that the upper surface is in close contact with the pressing end (110d-22), the lower surface of the piezoelectric element (110d-33) And generate a first signal.

In addition, the second board (110d-35) is fixed to the lower surface of the socket, the lower surface is in close contact with the pressing projection and the upper surface is in close contact with the lower end of the piezoelectric element (110d-33) is configured to generate a second signal do.

Based on the above configuration, the vibration pressure generated by the vibration of the weight 110d-2 is transmitted to the piezoelectric elements 110d-33 through the first board 110d-34, and the main body 110d-1. Vibration pressure generated at the lower side of the) is configured to be transmitted to the piezoelectric element (110d-33) through the second board (110d-35), the first board (110d-34) is the vibration pressure of the upper side is transferred The first signal, which is the second detection signal generated from the piezoelectric elements 110d-33, is generated, and the second board 110d-35 is generated from the piezoelectric elements 110d-33 to which the vibration pressure of the lower side is transferred. The second signal, which is the second detection signal, is generated to transmit the generated first and second signals to the relay station 30.

Although not shown, for example, the central server 40 collects the first signal and the second signal, calculates and compares an average value of each signal, or collects the first signal and the second signal, but the signal of the two signals. By selecting a signal having a small deviation in value, it is possible to perform a precise diagnosis of leaks through a more stable second detection signal.

As the vibration sensor 110d is connected to the sensing unit 100 to detect the leak as described above, a plurality of second detection means 20 are installed at a predetermined interval in the pipeline P, and the pipeline P is installed at each installation point. By measuring the second detection signal which is a vibration signal of the fluid flowing therein, when the fluid flows in the pipe P, a vibration signal of a certain frequency band is generated by the pressure, that is, when the fluid does not flow in the pipe P. Since the vibration signal does not occur and the magnitude of the vibration signal changes according to the flow amount when the fluid flows, if the pipe P leaks due to a crack or the like, it passes before and after the leak point. After that, a difference occurs in the amount of fluid flowing, and the vibration signal also changes.

Therefore, when constantly measuring the vibration signal of the pipe (P) it is possible to detect whether or not the pipe (P) leaks.

Piezoelectric elements, such as piezoelectric piezoelectric (Piezo Ceramic), Piezo quartz (Piezo Quartz) can be used as such piezoelectric elements, these piezoelectric elements are high accuracy, relatively low cost, because the large area pipeline (P Even if the network is installed in plural, the installation cost can be avoided.

On the other hand, as shown in Figure 4, the outer circumferential coating layer (110d-24) may be formed on the outer circumferential surface of the weight (110d-2), which is why the Senshinbu according to the present invention is buried in the ground humidity relative to the ground Has a high environment, when moisture or condensation occurs on the weight 110d-2, it may adversely affect the vibrational movement, thereby causing an error in the second detection signal.

The outer coating layer (110d-24) comprises 10 to 20 parts by weight of sericite powder, 1 to 5 parts by weight of manganese oxide, 0.5 to 3 parts by weight of cellulose acetate, 1 to 5 parts by weight of calcium nitrite based on 100 parts by weight of polyacrylic acid resin Can be configured.

Polyacrylic acid resin is used as a main material, which is to prevent the formation of condensation by adding water to the outer coating layer (110d-24) as a water-soluble binder.

The sericite is used to reinforce the strength of the outer coating layer 110d-24 as a filler, and in particular, to prevent condensation of the outer coating layer 110d-24 as a hydrophilic mineral, thereby smoothing the weight 110d-2. It is to make the vibration.

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

On the other hand, even if the hydrophilicity is imparted by adding cellulose acetate to the polymer as described above, it is not possible to control the scale due to foreign substances on the surface of the weight 110d-2. In general, the colloidal material, EPS, protein, etc. as the other material has a weak negative charge by the selective adsorption of anions, particularly hydroxide ions in the medium, so that the manganese oxide is 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, thereby controlling the generation of scale by sludge.

The calcium nitrite is to improve the rust resistance to prevent the deposition of scale due to corrosion on the weight (110d-2). It serves to protect against corrosion without affecting the strength of the outer coating layer (110d-24), etc., and to prevent the corrosion of the weight of the metal weight (110d-2) of a relatively small amount of use. .

The mechanism of action of calcium nitrite is stable while nitrite ions (NO2-) react with iron ions (Fe ++) eluted from iron (Fe) to block the formation of ferric hydroxide [Fe (OH) 3], a rust component. The compound Fe2O3 will be produced. The Fe 2 O 3 thus formed forms a film at the corrosion point formed on the weight 110d-2 and closes it, thereby preventing the corrosion of the weight 110d-2.

When the noise sensor 110e is connected to the sensing unit 10, the noise sensor 15 may be coupled to the outer side of the pipeline P along the pipeline P in a band type or an adhesive type. If water leaks around the pipeline P for a long time, a space may be formed in the ground due to the leak. At this point, the possibility of the departure and breakage of the pipeline P increases, and the sound leaks due to the departure and damage of the pipeline P. Since the sound will ring in this space, the amplified leak sound through the noise sensor 15 will be able to determine whether or not the leak.

For example, when a sinkhole, which is a phenomenon in which the ground is turned off while the space formed by erosion of the ground increases, is generated around the pipeline P, the noise sensor 15 may recognize in advance before the sinkhole phenomenon occurs. As well as leak detection, it is possible to provide an effect to prevent the occurrence of large accidents caused by the sink hole.

Hereinafter, an embodiment of the second detection means 20 according to the present invention will be described with reference to FIG. 6.

As shown, the second detection means 20 may be connected to the communication unit 31 and the power supply unit 32 of the relay station 30 through a cable 33, which is the sensing unit through a cable 33. The second detection signal of 100 may be transmitted to the relay station 30, and may be configured to supply power to the second detection means 20 from the power supply unit 32 of the relay station 30.

In addition, the second detection means 20 is configured to receive power from the power supply unit 32 of the relay station 30, in particular, it is possible to always supply power to the RFID unit 200, the battery of the RFID unit 200 The exchange becomes unnecessary and thus semi-permanent use can be possible.

In addition, as described above, the RFID unit 200 may be supplied with power through the cable 33 to improve the communication environment with the portable reader 22a or the relay station 30.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims

First detection means installed at predetermined intervals of the pipeline embedded in the ground;

At least one second detection means installed between each of the first detection means and generating a second detection signal which is a value obtained by measuring information about a pipeline and surroundings of the pipeline;

Whether the leak is communicated with the first detecting means and the second detecting means, and the leak detection core section is first selected from the first detecting means, and the leak is detected through the second detection signal of the second detecting means for the selected leaking detection period; Central server to identify the leak location;

Leakage detection system of a pipeline embedded in the ground, characterized in that it comprises a.
The method of claim 1,

Flow meter is applied as the first detection means,

The flow meter is a leak detection system of underground pipelines, characterized in that configured to measure the flow rate of the fluid passing through the pipeline at the installed point to the central server.
The method of claim 1,

The second detecting means

A sensing unit configured to generate a second detection signal which is a value measuring a pipe line and information about a pipe line;

An RFID unit connected to the sensing unit and disposed to be exposed to the ground of a point where the sensing unit is installed, and storing pipeline information of a corresponding pipeline;

Leakage detection system of underground pipes, characterized in that configured to include.
The method of claim 3, wherein

The sensing unit and the RFID unit is integrally coupled to the leak detection system of the underground pipe line, characterized in that configured to take one module form.
The method of claim 3, wherein

The sensing unit is connected to one or more of the temperature sensor, humidity sensor, pressure sensor, vibration sensor, noise sensor,

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, humidity sensor, pressure sensor, vibration sensor, and noise sensor. Leakage detection system of underground pipeline.
The method of claim 5,

The second detection means is connected to the relay station,

The relay station

A communication unit which receives the second detection signal and the unique code from the storage unit and transmits the second detection signal to the central server;

A power supply for supplying power to the second detection means;

Leak detection system of a buried pipeline characterized in that comprises a.
The method of claim 5,

The pressure sensor

A watertight structure having a space portion formed therein and a pressing protrusion formed on an inner bottom surface thereof and attached to a pipe line;

A weight that is spaced upward from the inner bottom surface of the main body in the space and a pressing end protrudes from the bottom;

An upper surface being in close contact with the pressing end and a lower surface being in close contact with the pressing protrusion to convert the vibration signal of the weight into a second detection signal and transmit the signal to the storage unit;

Sensing module for the leak detection of the buried pipeline characterized in that it comprises a.
The method of claim 7, wherein

The signal generation unit

A hollow is formed in the center;

A piezoelectric element disposed in the hollow;

A first board fixed to an upper surface of the socket, the upper surface of which is in close contact with the pressing end, and the lower surface of which is in close contact with an upper end of the piezoelectric element to generate a first signal;

A second board fixed to a lower surface of the assembly socket, the lower surface of the assembly socket being in close contact with the pressing protrusion, and the upper surface of the assembly socket being in close contact with the lower end of the piezoelectric element;

Sensing module for the leak detection of the buried pipeline characterized in that it comprises a.
The method of claim 5,

The temperature sensor further comprises a housing surrounding the outside,

The housing is 5 to 10 parts by weight of alumina, 5 to 10 parts by weight of sericite, 1 to 3 parts by weight of manganese oxide, 0.5 to 2 parts by weight of cellulose acetate, 1 to 5 parts by weight of calcium nitrite, manganese sulfide based on 100 parts by weight of silicon nitride Leakage detection system of the buried pipeline using a sensor, characterized in that configured to include 1 to 3 parts by weight.