KR100462269B1 - Water leakage detectable liquid pipe - Google Patents

Abstract

The present invention relates to a liquid tube that is easy to detect leaks, an object of the present invention has an outer periphery of a predetermined thickness t provided as an inner surface and an outer surface, the liquid flows into the hollow inner space formed by the inner surface An object of the present invention is to provide a liquid detection pipe for leak detection, comprising a liquid pipe and a pair of conductive wires embedded in an outer circumference.

The present invention provides a liquid pipe that accurately grasps the position of a liquid pipe embedded in the basement accurately, detects a leak due to breakage or damage of the liquid pipe, and accurately calculates the location of the breakage or damage.

Description

WATER LEAKAGE DETECTABLE LIQUID PIPE}

The present invention relates to a liquid pipe that is easy to detect leaks, and installs a liquid pipe in which a pair of conductors are inserted or fixed in the basement, and sends a pulse signal to the conductor using a pulse tester to inspect the received signal. It relates to a liquid pipe that is easy to determine whether the liquid pipe is damaged and the location of the damage.

Liquid pipes used for tap water / sewerage are usually buried underground. Such a liquid pipe is damaged due to aging or other causes, and since the liquid pipe is buried underground, it is not easy to determine whether or not the damage is in place.

For example, in the case of water supply, about 20% of tap water is leaked because old water pipes are not replaced. However, in the case of the conventional leak detection technology, there is a difficulty in detecting a small amount of water leak, and there is a problem that the leak position cannot be accurately identified. Referring to the conventional leak detection method is as follows.

First, there is a way to detect green food from the ground. In this case, use tools such as listening sticks or the hearing of a trained professional. In addition, when sound generated by a leak is transmitted to the surface, the sound may be detected and amplified on the surface, and then listened to the receiver or analyzed by a meter to detect the leak.

However, since it depends on the hearing rod or the hearing of a person, it can be detected only when a certain amount of leakage occurs. In addition, the water supply line is to be buried at a depth of 1.2 meters or less above the ground, so it is difficult to detect leaks in small amounts and it is difficult to accurately detect the leak point. In addition, in the case of a water supply pipe installed under a traffic road that is not a dedicated site, it is almost impossible to detect the traffic noise due to traffic.

Second, there is a method of installing a moisture detection sensor on the outside of the pipe to detect water leaked to the outside using the sensor. The use of sound waves or moisture sensors can be used as concepts such as online monitoring because there is an advantage that can be immediately known through alarm signals when a leak occurs due to pipe attachment. However, if the soil itself contains water, the installation of a water sensor outside the pipe will cause an error in leak detection.

Third, there is an isolated method that uses a bypass line to isolate the pipeline from the network and then perform the inspection. This method isolates the line and closes one end of the pipe line and pushes the sphere slightly larger in diameter than the inner diameter of the tube by hydraulic pressure. It is a phenomenon that can not proceed. That is, if the sphere pushed by the hydraulic pressure no longer proceeds, it means that there is a leaking site at that position.

However, when there are two or more leaking parts that are far from each other, it is difficult to detect the location of the leaking part located in the middle, and it is almost impossible to detect very fine through cracks such as stress corrosion cracking or it takes a long time.

In the case of sewage, there is a problem that the soil is contaminated when a leak occurs. In the case of sewer pipes, the cause of leakage is often artificial, unlike water pipes. Looking at the error form, there is a miscontact caused by a poor connection between the pipe and the pipe, the other passage through the gas pipe through the sewage pipe, the separation of the joint from the junction between the pipe and the pipe, and other foreign matter penetration. In order to check for such an error, a method of finding an error site using CCTV has been mainstream, but in order to perform the inspection by a conventional method, there is an inconvenience of having to dig an excretion position and input inspection equipment.

In addition, since there is no system for providing and inspecting the status of each water supply / sewerage pipe that forms the entire water supply network to the manager collectively, when an abnormality occurs, each water supply / sewerage pipe should be checked individually. Accordingly, there is a problem that the efficiency is reduced and the time and cost are increased.

In order to solve the above-mentioned problems, a technique for connecting a sensing element around various kinds of conduits including a liquid tube has been proposed in US Pat. No. 6,265,880. The patent discloses a method for checking an abnormality of a conduit using a bridge resistor. It is presented in detail. However, the U.S. patent has a problem in that it is buried underground and cuts the conduit to an appropriate length and is applied to a liquid pipe having a connection port.

The present invention has been made to solve the above problems, and an object of the present invention is a liquid pipe network buried underground and easy to detect leaks and a liquid pipe network that presents a wiring method for the connection between a plurality of liquid pipes and such The purpose of this study is to present a leak detection system that manages a liquid pipe network, a database for each liquid pipe length, and a leak detection method.

The above object of the present invention has an outer circumference of a predetermined thickness t provided as an inner surface and an outer surface, and a hollow inner space formed as the inner surface includes a liquid pipe through which liquid flows and a thickness of 1 mm or less embedded in the outer circumference. It can be achieved by a leak detection liquid tube, characterized in that it comprises a pair of conductors, preferably, the conductors are provided at a depth of less than t / 2 from the outer surface. In addition, the connection portion is provided on the outer surface of a position away from the inlet for the liquid inlet and the outlet for the liquid outflow for connection with the neighboring liquid pipe, to facilitate the electrical connection between the conductors of the neighboring liquid pipe It is preferable to further provide.

The connection part is formed on the outer surface of the point where the conductive wire protrudes in a convex shape, the liquid pipe has an insertion groove formed to expose the embedded wire, and the bottom surface of the connection portion has an adhesive layer for bonding to the insertion groove. Prepared and configured.

The leak detection liquid tube proposed by the present invention has an outer circumference having a predetermined thickness provided as an inner circumferential surface and an outer circumferential surface, and the hollow inner space formed as the inner circumferential surface is formed with a coating having a predetermined thickness on the entire liquid circulating liquid tube and the outer circumferential surface thereof. At least a pair of conductive wires are formed in a spiral shape while maintaining a constant distance to the protective layer and the protective layer. Such liquid tubes are mainly formed of steel tubes.

Another embodiment of the leak detection liquid tube proposed by the present invention has an outer circumference having a predetermined thickness having an inner circumferential surface and an outer circumferential surface, and a hollow inner space formed by the inner circumferential surface of the liquid and flowing liquid tubes. There is a leak detection liquid pipe, characterized by having a groove having a predetermined depth formed spirally along the outer circumferential surface. The liquid tube is characterized in that it further comprises at least a pair of coated conductors provided in the groove of the predetermined depth while electrically insulated from the liquid tube as an electrical insulator.

Drain pipe for easy leak detection to achieve the object of the present invention, it is formed while joining the adjacent PE line while rotating the PE line provided in a line shape spirally, cut vertically with the longitudinal direction of the PE line A pair of conductive wires and the first PE layer, which are filled in the first PE layer and the first PE layer having a cross-section forming one interface, and are inserted between the filler and the filler in an insulated state. It is characterized by consisting of a second PE layer provided in the outer layer. At this time, the melting point and the strength of the second PE layer provided in the drain pipe are preferably lower than the first PE layer, respectively.

1 is an external perspective view of a leak detection liquid tube according to the present invention.

2A to 2C are cross-sectional views of a leak detection liquid pipe classified according to a material for manufacturing a liquid pipe according to the present invention.

3 is an embodiment of a drain pipe according to the present invention.

4 is a flow diagram illustrating a process of connecting neighboring liquid tubes to each other according to the present invention.

5 to 7 are diagrams showing an embodiment of the connecting portion provided in the leak detection liquid pipe according to the present invention.

8 is a state diagram showing a state for interconnecting two liquid tubes.

9 is a diagram illustrating a state in which a plurality of liquid tubes are connected.

10 is an exemplary configuration diagram of a liquid pipe network.

11 is a configuration diagram of a leak detection system of a liquid pipe.

12 is a flowchart of a liquid pipe network installation and initial position data storage process.

13 is a flowchart of a correction position data correction and leak detection process.

14 is an exemplary diagram of data correction of a leak detection system of a liquid pipe.

15 is an explanatory diagram showing a structure of a pipe network database.

Hereinafter, with reference to the accompanying drawings will be described in detail the advantages, features and preferred embodiments of the present invention.

1 is an external perspective view of a leak detection liquid tube according to the present invention. As shown in FIG. 1, the leak detection liquid pipe 10 according to the present invention has a shape in which at least one pair of conductive wires 11a and 11b are spirally wound along an outer circumferential surface of the liquid pipe. Preferably, a pair of conductive wires are wound in a spiral while being spaced apart by a predetermined distance from each other while maintaining a uniform pitch P. At this time, the spirally wound conductor is to be provided with a separate protective layer 13 in order not to contact the outer surface. This is to prevent the conducting wires from being damaged even when contacted with the ground during transportation of the water supply pipe. In addition, the spirally wound conductor 11 is preferably buried between the inlet and outlet of the liquid pipe at a predetermined distance, and in FIG. 1 at a distance d, but may be embedded entirely up to the outer end face of the inlet and the outlet. . In the embedding of the conductive wire 11, in the prior art, the end of the embedded conductive wire is exposed to the outside in order to provide an external connection connection part for connecting to an external test apparatus in advance.

However, as described above, the liquid pipe 10 has to be transported to the excretion position, so that the conductive wire 11 or the connection part exposed to the outside is damaged while transporting the heavy liquid pipe. Therefore, the liquid pipe according to the present invention uses a method of forming a connection connecting portion for connecting with the adjacent liquid pipe after arranging the liquid pipe 10, it should be able to easily grasp the position where the conductor is embedded. To this end, when viewed from the outer surface (protective layer) 13, it is necessary to allow the conductor 11 to protrude slightly convexly from the upper surface of the ambushed position so that the position of the conductor 11 is embedded. This can be caused to spontaneously pop out during manufacture by the thickness of the embedded wire.

The wire 11 according to the present invention uses a very thin wire and, if necessary, is coated with a non-conductor. The conductive wire 11 to be used has a thickness of about 1 mm at the maximum, and preferably has a thickness of 0.5 mm. If the thickness of the conductive wire 11 exceeds 1mm, a leak may occur and a crack may not be broken even when a crack occurs in the liquid pipe 10. Therefore, in the case of the conductive wire having the above-described thickness, when the liquid pipe 10 breaks, the conductive wire 11 is broken by hydraulic pressure, and when the liquid pipe 10 leaks, the conductive wire 11 is submerged. The wire 11 is mainly used as a copper wire, but when the liquid pipe 10 is a cast iron pipe, the liquid pipe 10 itself passes through electricity well, so it is used by using a nichrome wire or by coating with a non-conductor. More preferably, tar (11) coated with tar, which is an insulator, is used.

When the liquid pipe 10 is used as a water pipe, it is made of steel pipe, cast iron pipe, PE (Poly Ethylen) pipe, Hi-3P impact water pipe, stainless steel pipe, and PE steel pipe. Each tube is easily understood by those of ordinary skill in the art, and a detailed description thereof will be omitted. In the PE pipe, steel pipe and cast iron pipe most widely used as a material of the water supply pipe, a method of inserting the conductive wire applied in the present invention will be described.

Figure 2a shows a cross-sectional view of the PE pipe, the PE pipe is produced by injection molding while compressing the PE (10). Since the temperature of the PE pipe is typically about 600 ° C. during manufacture, the PE pipe can be injected by inserting the conductive wire 11 at an appropriate position. At this time, the conductive wire 11 to be inserted is located between t / 5 and t / 2 from the outer layer when the total thickness of the PE pipe is t. When buried closer to the outer surface layer than t / 5, there is a risk of being damaged during transportation, and when located inside t / 2, the location where the wire is buried cannot be confirmed from the outside. In addition, in the case of small cracks that do not proceed to the outer surface of the PE pipe and only on the inner side, no leakage occurs in transporting the liquid.However, when the conductor is placed inside t / 2, the cracks also occur on the inner side. Leakage may be mistaken.

Figure 2b shows a cross-sectional view of a steel pipe, the steel pipe is welded in a state of rolling a thin stainless steel sheet 10 in a circular state, and then a plurality of typically 5 to 6 PE or PVC coating film 13 in the outer layer Form. At this time, the formed PE or PVC coating film has a thickness of at least 5mm or more, and the embedded wire 11 is buried in a position close to the outer circumferential surface of the steel pipe 10 if possible. By being located close to the outer circumferential surface of the steel pipe 10, it is possible to transmit the state of the steel pipe to the wire 11 more accurately, and when embedded in a position far from the outer circumferential surface of the steel pipe 10, there is a problem that weakens the external impact. . In the case of a steel pipe, as shown in FIG. 2B, the conductive wire 11 is embedded between the coating films 13, and when the thickness of the coating film 13 is t, it is embedded at a position deeper than t / 2 from the outer circumferential surface of the coating film. It was.

Figure 2c shows a cast iron pipe, the cast iron pipe is manufactured in a manner of hardening while rotating the casting after pouring the casting mold. At this time, since the melting temperature of the cast iron is more than 1000 ℃, there is a problem that it is difficult to embed the conductive wire 11 inside the pipe, such as PE pipe, or to form a PE coating film as in a steel pipe. Therefore, in the case of cast iron pipe, the tar wire coated with the conductive wire on the mold, the line width is about 1cm and the thickness is about 5mm, and the groove can be inserted in advance, and after the cast iron pipe 10 is manufactured, the outer groove is The tar wire 14 provided with the conductive wire 11 was attached therein.

3 shows an embodiment of a drain pipe according to the present invention. The drain pipe is constructed using one long PE line 19 of rectangular shape as shown in Fig. 3 (a). Fig. 3 (b) shows a cross section of the PE line 19 in the direction A-A 'of Fig. 3 (a), in which a relatively strong PE cluster 19-2 is formed as shown in the cross section. The inside of the cluster is provided with a pair of conductive wires 11-a and 11-b inserted into the electrical non-conductive filler 19-3 and inserted while maintaining an insulated state between the filler 19-3. Done. Since the drain pipe tends to be broken mainly by artificial causes rather than natural aging, it is preferable to use a lead wire of about 1 mm or more thicker than the lead wire inserted into the water pipe.

Outside the PE cluster to have a PE layer 19-1 that melts at a lower temperature than the PE cluster 19-2. It is preferable that the strength of the PE cluster is higher than that of the PE layer 19-1 provided outside thereof. In the manufacturing of the drain pipe according to the present invention, as shown in FIG. 3 (c), when the PE layer of 19-1 is wound in a spirally long PE line along the outer circumferential surface of the cylindrical frame, the PE layer of 19-1 As this melts, a drain pipe as shown in FIG. 3 (d) is formed.

As described above, the liquid pipe according to the present invention adopts a method of installing a connection port after transporting the liquid pipe to the site. The order of this will be described using the flow of FIG. 4. First, the liquid pipe is placed in a position to be installed (ST310). The neighboring liquid pipes arranged are physically connected to each other (ST320). Up to this point, the connection of the liquid tube is completed in the same manner as the method of embedding the conventional liquid tube. Next, after determining the position where the conductive wire of the liquid pipe 10 is embedded, a groove is formed to expose the conductive wire 11 through the upper region in which the conductive wire is embedded (ST330). At this time, by properly adjusting the punching depth should use a punching machine that can adjust the depth so that the liquid pipe 10 itself is not punctured. Next, the connection part connected with the exposed conductor 11 is provided (ST340). The liquid pipes are electrically connected to each other by connecting the connection parts installed in the adjacent liquid pipes by using separate conductive wires coated with each other (ST350). At this time, it is preferable to provide a router between neighboring liquid tubes, as described later, rather than directly connecting the adjacent liquid tubes.

Fig. 5 shows an embodiment of the connecting portion provided in the liquid pipe of the present invention. The leak detection liquid pipe according to the present invention is provided with a connection portion 30 connected to the bottom surface of the insertion groove formed by forming one insertion groove punched to expose the conducting wire (11). In the drawing of FIG. 4, the conductive wire 11 spirally wound on the outer circumferential surface of the liquid pipe 10 is illustrated as being exposed for convenience of description and is substantially invisible from the outside because the conductive wire is covered by a protective layer. . The connection part 30 is provided with an adhesive layer 31 on the bottom surface, and has an insertion groove 32 for inserting the conductive wire 11 embedded in the liquid pipe 10 in the lower part, and the neighboring liquid in the upper part. An insertion groove 33 is provided for inserting the coated conductor 15 for interconnecting the tube 10. When the wires 11 and 15 are connected to the lower insertion groove 32 and the upper insertion groove 33, respectively, the adjacent liquid pipes 10 can be electrically connected to each other. At this time, instead of the insertion groove (32, 33) is provided with a screw thread on the outer circumferential surface of the connecting portion 30 and can also be used in a manner of winding the conductive wire 11 and the conductive wire 15 around the thread. In addition, the protective cap 35 may be put on the upper end of the connecting portion 30 to fix the conductive wire 11 more firmly. Preferably, the connecting portion 30 and the protective cap 35 are formed in a cylindrical shape, and screw grooves are formed on the outer surface of the connecting portion 30 and the inner surface of the protective cap 35 like bolts / nuts, respectively. The connection part 30 is provided in the both ends of the liquid pipe 10 by the number of conducting wires 11, respectively.

Fig. 6 shows another embodiment of the connecting portion provided in the liquid pipe of the present invention. FIG. 6 (a) is a perspective view of the connecting portion, and FIG. 6 (b) is a sectional view showing a state in which the connecting portion is inserted into the coating film 13. As shown in FIG. 6, the connection part 30 according to the present invention is inserted into an insertion groove formed at one end of the liquid pipe 10, and the lower end of the connection pipe 30 is formed by the adhesive 31 or the like. It is installed by being fixed to the coating film 13. Preferably the size of the connecting portion 30 is to be the same as the size of the insertion groove. That is, the cross-sectional area of the connection part 30 is the same as the cross-sectional area of the insertion groove to prevent the connection part 30 from moving or deviating from the inside of the insertion groove and to protrude out of the insertion groove by making the height equal to the depth of the insertion groove. To prevent them. When the connection part 30 is installed, the fixing screw 46 is inserted and lowered through the screw hole formed in the upper surface of the support mechanism 42, and the connection plate 44 comes in close contact with the conducting wire 11. As shown in FIG. In forming the insertion groove by using a punching machine, the punching machine removes the PE coating layer 13 to the position of the conductive wire 11 so that the conductive wire is exposed to the lower portion of the insertion groove. In addition, since the connecting plate 44 moves up and down along the binding hole 43 on the side of the support mechanism 42, the connecting plate 44 descends to be in contact with the conductive wire 11 to form an electrical connection. The set screw 46 prevents the connecting plate 44 from coming into contact with the conductive wire 11. Therefore, the electrical connection state of the connecting plate 44 and the conducting wire 11 can be maintained.

A connecting line 15 made of a conductor is connected to the head of the fixing screw 46. Preferably, the connecting wire is wound around the lower part of the head of the fixing screw 46, and the connecting screw is fixed by inserting and lowering the fixing screw 46 into the screw hole of the upper surface of the supporting mechanism 42. The connection work of the connecting line 15 may be performed at any time during the installation process of the connecting unit 30. When the connection part 30 of both liquid pipes and the connection of the connection line 15 are completed, the connection is completed by connecting and connecting each connection line 15 connected to each connection part 30 of both liquid pipes 10 electrically. . The connecting plate 44, the fixing screw 46 and the connecting line 15 are formed of a conductive conductor, and preferably formed of the same material as the conductive wire 11. The support mechanism 42 can also be formed of a conductor made of the same material as that of the conductor 11.

7 is a view showing another embodiment of the connection portion, Figure 7 (a) is a perspective view of another embodiment of the connection portion, Figure 7 (b) shows a case where it is applied to the steel pipe as the connection portion 30 It is a sectional view of the state inserted into the coating film. As shown in FIG. 7, another embodiment of the connection unit according to the present invention is inserted into an insertion groove formed at one end of the liquid pipe 10, and the bottom surface of the support plate 48 is bonded by an adhesive 31 or the like. It installs by fixing to PE coating film 13 of liquid pipe 10. When the connecting portion is installed, the fixing screw 46 is inserted and lowered through the screw hole formed in the upper surface of the supporting mechanism 42 to fix and contact the conductive wire 11 between the supporting plate 48 and the connecting plate 44. In forming the insertion groove by using the punching machine, the punching machine removes the PE coating film 13 to the position of the conductive wire 11 and cuts and lifts one side of the conductive wire 11, so that the conductive wire 11 is supported by the support plate 48. It can be inserted between the connecting plates 44. In addition, since the connecting plate 44 moves up and down along the binding hole 43 on the side of the support mechanism 42, the connecting plate 44 descends to be in contact with the conductive wire 11 to form an electrical connection. The fixing screw 46 prevents the conductive wire 11 from being released from being disconnected between the supporting plate 48 and the connecting plate 44. Therefore, the electrical connection state of the connecting plate 44 and the conducting wire 11 can be maintained.

A connecting line 15 made of a conductor is connected to the head of the fixing screw 46. Preferably, the connecting wire is wound around the lower part of the head of the fixing screw 46, and the connecting screw is fixed by inserting and lowering the fixing screw 46 into the screw hole of the upper surface of the supporting mechanism 42. Connection of the connecting line 15 may be performed at any time during the installation process of the connecting portion. When the connection part of both liquid pipes and the connection of the connection line 15 are completed, each connection line 15 connected to each connection part of both liquid pipes 10 is connected and electrically connected. Preferably, the connecting line 15 is spirally wound along the outer circumferential surface of the liquid pipe 10.

The connecting plate 44, the fixing screw 46 and the connecting line 15 are formed of a conductive conductor, and preferably formed of the same material as the conductive wire 11. The support mechanism 42 and the support plate 48 can also be formed of a conductor made of the same material as that of the conductor 11.

8 is a state diagram showing a state for interconnecting two liquid tubes. FIG. 8A illustrates a state in which the liquid tubes 10 and 170 are connected to each other. The liquid tube 10 includes a pair of conductive wires 11a and 11b and four connection parts 30a, 30b, 30e and 30f. The liquid pipe 170 is provided with a pair of conductive wires 11c and 11D and four connection portions 30c and 30d, the rest of which is not shown. The connection part 30a and the connection part 30c are connected using the connection line 15a, and the connection part 30b and 30d are respectively connected through the connection line 15b. The connection parts 30e and 30f of the liquid pipe 10 are connected to a pulse tester 200 for detecting whether the liquid pipe leaks. FIG. 8 (b) shows a cross-sectional view along the line A-A ′ of the liquid tube 170, and shows that the pair of conductors are provided while forming the same pitch approximately 180 degrees while the pair of conductors 11c and 11d are provided while maintaining the same pitch. For this reason, the connection part of the liquid pipe is also provided while making approximately 180 degrees to each other.

In order to detect the damage of the liquid pipe according to the present invention, the pulse tester 200 is installed at one end of the liquid pipe line formed to be connected to each other, and the wire of the opposite side (connection part of the liquid pipe 170 not shown in the drawing) is Ensure grounding or shorting. Therefore, the pulse signal sent out from the pulse tester 200 is transmitted through the lead of each liquid pipe, and returned from the end of the lead of the last liquid pipe. Therefore, by analyzing the waveform and the reception time of the received reflected pulse signal, it is possible to calculate whether the liquid tube is damaged or the damage position.

The pulse signal used in the pulse tester 200 may include a square wave, sawtooth wave, or sine square wave, and can be selected according to the type of tester. Preferably, a sine square wave having the least harmonic content is used. In addition, the maximum measuring distance of the pulse tester is about 100 km in modern technology. Therefore, in the case of leak detection according to the present invention, when the conducting wire is formed in a spiral, a liquid tube of several tens of kilometers can be inspected with one pulse tester. The frequency of the pulse signal is automatically adjusted according to the length of the measurement object. In other words, if the length is short, the pulse signal of high frequency is long, and if the length is long, the pulse signal of low frequency is measured. In addition, the pulse tester can determine the fault condition of the liquid pipe by grasping the cable condition according to the waveform of the reflected pulse. That is, it is possible to grasp disconnection (opening), crosstalk (shorting), immersion and crosstalk. Therefore, the fault state can be grasped by the waveform of the reflected pulse signal, and the fault position can be measured by the reception time. That is, in the case of disconnection (opening), it is determined that the corresponding position of the liquid pipe is completely broken, and in the case of crosstalk (shorting), it is determined as construction failure. Also, in case of flooding, it is determined that there is a leak at the corresponding position.

The pulse tester 200 generates and transmits a pulse signal periodically and receives a reflected pulse signal that is reflected and returned. Preferably, a low frequency pulse tester (TDR) is used to find the exact location of the leak. The pulse tester 200 includes pulse tester information for identifying the corresponding pulse tester, that is, a pulse tester ID and transmission means for transmitting the reflected pulse signal (not shown), and preferably, data can be transmitted wirelessly. Wireless transmission means is provided.

FIG. 9 is a view illustrating a plurality of liquid pipes connected to each other, and illustrates an embodiment in which three liquid pipes 10 form a T-shape and are connected via a router. Each liquid pipe 10, 170, 180 is connected to each other by a connection pipe 100, and the conducting wires provided in each liquid pipe are connected to the connection parts 30a to 30f provided in the connection pipe, respectively, and the connection parts 30a to 30f. ) Are connected to the connection portions 100a to 100f of the connector 100 by the connecting line 15, respectively, and the connection portions 100a to 100f of the connector 100 are connected to the connection points 150a to 150f of the router 150. Each is connected. The router 30 electrically connects or disconnects the conducting wires of the liquid pipes by a control signal transmitted from the outside.

The connecting tube may take various forms depending on the number or type of connecting liquid tubes. For example, when connecting two liquid tubes, use a straight or '-' connector, connect 'T' for three liquid tubes, and '┼' for four liquid tubes. Use a tube.

The router 150 according to the present invention is to cope with the occurrence of a connection section such as a 'T' shape or a '┼' shape when the liquid pipe network is formed, and a liquid selected from each liquid pipe connected by the connection pipe 100 is formed. It functions to connect the lead of the pipe, that is, the liquid pipe to perform leak detection through pulse signal transmission. That is, when three or more liquid tubes are connected to form a multi-connection, it is possible to set / change the transmission path of the pulse signal. The operation of the router is controlled by a control signal transmitted from the outside, and the pulse test can be performed by constructing a partial network on the section where the leak is suspected or leak detection on the liquid pipe network. The router 150 may be designed as a dedicated chip (ASIC) that does not attenuate the signal of the pulse tester, and may be installed in the connector 100, and may continue the network test by fixing it as one path even in its own failure. Router 150 according to the present invention is provided with connection points (150a to 150f) to which the conductors of each liquid pipe are connected and receiving means (not shown) for wirelessly receiving control signals from the central monitoring system. The router 150 electrically connects the connection points of the respective liquid pipes by electrically connecting the connection points according to the control signal received through the receiving means.

10 is an exemplary configuration diagram of a liquid pipe network. As shown in FIG. 10, the liquid pipe network 300 according to the present invention controls the router 150 by a control signal of a central monitoring system to freely set the connection path of the conductive wires, and through the pulse tester 200. By sending a pulse signal along the set path, it is possible to detect whether each liquid tube is damaged.

When the router control signal is set to route liquid pipes P1: P2: P6: P10: P14: P18: P22 from the central monitoring system, routers R1, R2, R5, R6, R10 and R11 operate to The conductors are electrically connected. In detail, a control signal including a liquid pipe ID to be connected to a router ID is transmitted to each router. For example, control signals in the form of R1: P1: P2, R2: P2: P6, R5: P6: P10, R6: P10: P14, R10: P14: P18 and R11: P18: P22 are transmitted.

When the path is established by the router, the pulse tester T1 transmits the pulse signal S1 to the set path, and the transmitted pulse signal is transmitted to the end of the path as long as the disconnection, that is, the liquid pipe is not broken, is terminated. Reflected by the pulse signal is received by the pulse tester (T1). The pulse tester T1 transmits the pulse tester ID and the received reflected pulse signal to the central monitoring system, and the central monitoring system calculates whether the liquid pipe is damaged or damaged by applying the received reflected pulse signal to the set path and analyzing the received pulse signal. do. That is, it extracts the set path through the pulse tester ID (T1), extracts the information of the liquid pipe and the conductor about the set path from the pipe network database, and analyzes the waveform and the reception time of the reflected pulse signal to the extracted information. do. 10 shows that the damage type and the damage location of the A1 and A2 points can be calculated by analyzing the waveform and the reception time of the reflected pulse signal.

Similarly, router control signals R12: P23: P24, R13: P24: P25, R14: P25: P21, R10: P21: P14, for setting the path to liquid pipes P23: P24: P25: P21: P14: P7: P4 When R6: P14: P7 and R3: P7: P4 are transmitted, each router establishes a path, and the pulse tester T2 sends a pulse signal S2 along the set path, and receives a reflected pulse signal to the central monitoring system. send. The central monitoring system analyzes the reflected pulse signal by applying it to the set path and calculates the damage type and the damage location of A2 and A3.

11 is a configuration diagram of a leak detection system of a liquid pipe. In the leak detection system of the liquid pipe according to the present invention, a plurality of liquid pipes 10 installed by inserting or fixing one or more conductors are connected to each other by a connection pipe 100 to form a network, and to each liquid pipe 10. At least one pulse tester 200 that is connected to the wire is installed by the router 150 is routed and electrically connected, and transmits the pulse signal to the set path of each wire and receive the reflected pulse signal to transmit the received reflected pulse signal (200) Central monitoring system 60 for providing a monitoring environment by receiving and analyzing the liquid pipe network 300 having a reflection pulse signal, to determine the state of the liquid pipe 10 and to display the information of the liquid pipe network 300 , An administrator client 80 for managing the Internet or wired / wireless communication network 70 and the liquid pipe network 300.

The central monitoring system 60 according to the present invention transmits a router control signal, receives a pulse tester ID and a reflected pulse signal, and grasps the state of the conductive wire to determine the state of each liquid pipe, and Information is displayed and a warning message is transmitted to the manager client 80 when a problem occurs in the predetermined liquid pipe. In addition, when the liquid pipe network is a water supply facility, the central monitoring system 60 provides an integrated management environment such as water purification plant management and various remote meter readings, in addition to pipe leak detection.

The central monitoring system 60 includes a central monitoring server 62, an administrator database 64, a pipe network database 66, and a geographic information database 68.

The central monitoring server 62 according to the present invention transmits a router control signal to the router 150 for setting the path of the conductor through which the pulse signal is transmitted or under the control of the manager client 80, and the pulse tester ( Receive the reflection pulse signal and the pulse tester ID for the pulse signal sent out through the path set from 200), and analyzes the received reflection pulse signal to determine the state of each liquid pipe for the path of the set conductor. Since the reflected pulse signal includes the waveform and the reception time of the reflected pulse signal, the reflected pulse signal is analyzed to determine whether each of the conductors in the set path are damaged or not, and if the damage occurs, the position of the damaged conductor is calculated and the position of the damaged conductor. The damage position of the liquid pipe is calculated from the equation.

Analysis of the reflected pulse signal is carried out through a comparative analysis of the reception time and waveform of the reflected pulse signal with respect to the liquid tube in a steady state and the received reflected pulse signal. In the installation of a liquid pipe network, data including liquid pipe lengths calculated from a steady state reception time, waveform, lead length, and lead length of each liquid pipe by transmitting and receiving pulse signals to interconnected liquid pipe conductors. (Hereinafter referred to as 'initial location data') is acquired and stored in the pipe network database. In addition, in the operation of the liquid pipe network, the transmission speed of the pulse signal changes according to the change of the surrounding environment, in particular the temperature, so as to prepare for the data calculated through the reflected pulse signal. The data used as a reference value (hereinafter referred to as 'correction position data') is periodically corrected. The position data for correction includes data such as initial position data. Initial position data and correction position data are acquired, calculated and stored for each liquid tube constituting the liquid tube network. The correction of the position data for correction is performed by selecting one or more liquid tubes, sending and receiving pulse signals, acquiring and calculating a steady state reception time, waveform, lead length, liquid tube length, and the like, and updating the pipe network database. Specifically, a predetermined liquid tube (first liquid tube) is selected from the liquid tube network to correct the position data for correction, the rate of change of the first liquid tube is calculated, and then another liquid tube, i.e., is not selected from the pipe network database. The correction position data for the entire liquid tube is corrected by extracting the position data for correction of the liquid tube (the second liquid tube) and applying the change rate to the extracted data. Thus, more accurate and accurate analysis results can be obtained. The calculation and correction of the position data for correction are described in more detail below.

The central monitoring server 62 also displays the liquid line network 300 and the current state information of each liquid line 10. The display is via a predetermined monitoring means or a predetermined web page. That is, when the manager client 80 controls and observes the central monitoring server 62 locally, the manager client 80 displays the monitor through a monitoring means. When the manager client 80 accesses the remote monitoring through the Internet or a wired / wireless communication network, the manager client 80 displays the web page. Such a server system may be implemented as a general personal computer capable of network connection with a central processing unit or control logic composed of hardware or software as necessary.

In addition, the central monitoring server 62, in displaying the state of the liquid pipe network 300, generates an alarm sound when there is a damaged liquid pipe 10, or changes the color of the damaged liquid pipe 10, or The administrator client 80 can easily identify the user through a method such as displaying a predetermined icon.

In addition, the central monitoring server 62 transmits a warning message to the manager client 80 when there is a damaged liquid pipe 10. The alert message is sent through e-mail or SMS (Short Message Service).

The manager database 64 according to the present invention stores the information of each manager client 80. The manager client information includes personal information, manager's work area, and authentication information of the manager client 80. The authentication information is information for authenticating an administrator client connected remotely or locally.

The pipe network database 66 according to the present invention stores the information of the liquid pipe 10, the connection pipe 100, the router 150, and the pulse tester 200 constituting the liquid pipe network 300. That is, each ID, type of liquid tube and connector, type and length of conductor inserted into the liquid tube, length of liquid tube, ID of liquid tube connected through the connector, whether the liquid tube or connector is damaged or damaged It stores the type, damage location, initial position data of each liquid pipe and position data for correction. Preferably, in order to correct an error such as the length of the lead wire and the liquid tube according to the temperature, a calibrator is installed at a predetermined interval to correct the error on the database. The initial position data and the correction position data are data on a steady state without damage to the liquid tube, and preferably also store the frequency of the pulse signal sent out. Accordingly, the central monitoring system calculates whether the liquid tube is damaged, the damage type, and the damage position by applying the analysis result of the received reflected pulse signal to the correction position data and performing comparative analysis.

The geographic information database 68 according to the present invention is used to display the current state information of the liquid pipe network 300 or to recover damaged liquid pipes 10, each of the liquid pipes 10, the connection pipe 100, the router. 150 and the buried position of the pulse tester 200 and the connection type of each. In addition, the length of each liquid pipe and the length of the conducting wire provided in the liquid pipe can be stored. Thus, the lengths of the conductors and the lengths of some of the liquid tubes selected from the liquid tube network can be calculated. Therefore, it is possible to accurately determine the embedding position of the damaged liquid pipe 10 to perform a recovery operation.

The pipe network database 66 and the geographic information database 68 are constructed by cross-referencing the associated information. For example, when displaying the state of the liquid pipe network, the type of connection of the liquid pipe, the connector, the router, and the pulse tester is extracted from the geographic information database 68, and the pipe network database 66 using each ID. Detailed information is extracted from. In the restoration of the damaged liquid tube, the ID of the damaged liquid tube is extracted from the pipe network database 66, and the embedding position of the liquid tube is extracted from the geographic information database 68.

The manager client 80 according to the present invention manages the liquid pipe network 300 and performs maintenance and repair work of each facility, including the damaged liquid pipe 10. Therefore, the current state of each liquid pipe 10 is checked through the monitoring means provided by the central monitoring system 60 or the liquid pipe network 300 displayed on the web page, and the damaged liquid pipe 10 is repaired. . In addition, upon receiving a warning message from the central monitoring system 60, the state of the liquid pipe 10 is checked and restored.

The manager client 80 according to the present invention is provided with an administrator terminal 82 capable of accessing the central monitoring system 60 via the Internet or a wired or wireless communication network 70 and authentication means 84 for authenticating the manager client.

The manager terminal 82 according to the present invention receives the current state information of the liquid pipe network 300 by accessing a web page provided by the central monitoring system 60 or the central monitoring system through the Internet or a wired or wireless communication network 70. And displays the data input by the manager client 80 to the central monitoring system 60. The manager terminal 82 may be a personal computer, a PDA, a mobile phone capable of wireless Internet, an IMT 2000 terminal, or the like.

The authentication means 84 according to the present invention provides security of the liquid pipe network management by authenticating the manager client. A password may be used to authenticate the administrator client 80. If a high security or administrator client accesses the central monitoring system 60 from a remote location, the administrator client may be authenticated using a separate authentication means. Can be. As the authentication means 84, a smart card or a fingerprint terminal may be used.

12 is a flowchart of a liquid pipe network installation and initial position data storage process. Referring to Figure 12, the installation of the liquid pipe network and the initial position data storage process has the following flow.

The central monitoring system 60 establishes the pipe network database 66 and the geographic information database 68 (step S100), and stores the information of the liquid pipe network 300 (step S105). The liquid pipe network information includes information of each liquid pipe 10 to be installed in the liquid pipe network, the connection pipe 100, the router 150, and the pulse tester 200 and the embedding position. Preferably, the contents actually installed at the time of installing the liquid pipe network are stored. For example, when the liquid pipe is cut and used, the length of the used liquid pipe is stored instead of the entire length of the liquid pipe. Each data is stored in advance by a manager client in charge of the installation of a liquid pipe network, or may be made by data transmission in the field. In addition, if the construction of the liquid pipe network is different from the contents stored in the database, the data is subsequently updated.

The manager client 80 installs a pulse tester 200 constituting the liquid pipe network 300 (step S110), installs a liquid pipe 10 to be buried in a position connected to the pulse tester, and the router 150. Install (step S115). The pulse tester is installed at some end of the network. The installation process of the liquid pipe network is performed by repeating the installation of each liquid pipe and the calculation of the lead length and the length of the liquid pipe of the installed liquid pipe.

The central monitoring system 60 transmits a control signal for turning on / off a connection state between conductors of each liquid pipe installed in each router, in order to detect an installation state of each liquid pipe (step S120), and the router 150. In accordance with the received router control signal, the electrical connection between the conductors of each liquid pipe on / off or short (step S125). Since the pulse tester 200 continuously transmits the pulse signal to the conducting wire of the installed liquid pipe continuously at a predetermined cycle and transmits the received reflected pulse signal to the central monitoring system 60, the central monitoring system receives and analyzes the reflected pulse signal. Therefore, it is possible to detect whether each liquid pipe is installed. In addition, since the central monitoring system can wirelessly control the router remotely by using the router J signal, the connection between the conductors of the respective liquid pipes installed by using each router 150 is turned on / off or shorted to establish a path. By setting and receiving and analyzing the reflected pulse signal for the set path, the liquid pipe installed by branching into a '분기' shape or a '╋' shape can be detected.

The pulse tester 200 transmits a pulse signal along a path set by the router 150 and receives a reflected pulse signal reflected at a shorted position (step S130), thereby receiving the received reflected pulse signal and a pulse tester ID from the central monitoring system. Transfer to step 60 (step S135). Preferably, the frequency of the pulse signal is also transmitted. The pulse tester automatically sends out a pulse signal and transmits the received reflected pulse signal. Therefore, when the liquid pipe is further connected and each wire of the connected liquid pipe is connected by the router, the signal sent from the pulse tester is transmitted through the wire of the connected liquid pipe and the reflected pulse signal is received.

The central monitoring system 60 receives the reflected pulse signal and the pulse tester ID (step S140), detects the newly installed liquid pipe through the received data, calculates the lead length of the corresponding liquid pipe, and uses the calculated lead length. The length of the liquid tube is calculated (step S145). If the additional liquid pipe is installed, the reception time of the reflected pulse signal increases, and the central monitoring system analyzes the received reflected pulse signal to detect the additional installation of the liquid pipe, and the lead length and the liquid pipe length of the additional liquid pipe are installed. Can be calculated.

For example, in the case where the liquid pipe network is constructed as shown in FIG. 10, if only the liquid pipe P1 is installed, the router R1 shorts each lead of P1 and the central monitoring system receives the reflected pulse signal for P1. Therefore, the central monitoring system detects the installation of P1, calculates the length of the conductor installed in P1 through the reception time of the reflected pulse signal, and calculates the length of P1 through the calculated conductor length.

In addition, when the liquid pipes P1 and P2 are installed, when the router R1 electrically connects the wires of P1 and P2, and the router R2 shorts the wires of P2, the central monitoring system receives the reflected pulse signals for P1 and P2. . The central monitoring system loads the reception time, lead length, liquid tube length and connection form of each liquid tube connected to P1 from the pipe network database, and compares and analyzes the received reflection pulse signal. The reception time of the received reflection pulse signal is greater than the reception time of the reflection pulse signal with respect to P1, and the router control signal for setting the path to the router R1 to P2 connected in the horizontal direction with P1 can be detected, so that P2 is installed. have. In addition, the length of the entire conductor, that is, the length of the entire conductor in the state where P1 and P2 are connected, is calculated through the reception time of the received reflected pulse signal, and the lead length of P2 is calculated by subtracting the conductor length of P1 from the calculated result. do. In addition, the length of the liquid pipe P2 is calculated from the calculated conductor length. Therefore, P2 is computed as the value containing the length of connector C1. Similarly, when the liquid pipes P1 to P5 are installed, when router R1 electrically connects the wires of P1 and P5 and router R4 shorts the wires of P5, the central monitoring system receives the reflected pulse signals for P1 and P5 to P5. After detecting the installation and calculating the total conductor length through the received time of the received reflected pulse signal, the conductor length of P1 is subtracted from the calculation result to calculate the conductor length of P5 and the length of the liquid pipe P5. The length of P5 includes the length of the connector C1. In the absence of a router between the pipes, the pipe length can be calculated by estimating the length of the liquid pipe, either artificially shorted or open (original). In displaying the leak detection of the liquid pipe network and displaying the state of the liquid pipe network, the classification of the connection pipe becomes meaningless because it is necessary to calculate the exact location of the damage. Therefore, the damage part is calculated by judging the connecting pipe part in the same manner as a normal liquid pipe. In addition, when the waveform of the received reflected pulse signal is different from the waveform in the normal state, it can be seen that the measured liquid pipe is damaged, so as to send a warning message or the like to the manager client 80 to replace it with another liquid pipe.

In the actual construction, the contractor connects the pipe and the connector and at the same time establishes the pipe network DB through monitoring the pulse tester. That is, a connector without a router artificially shortens the connection as described above, or maintains an open state, while a connector with a router establishes an appropriate path while enabling accurate DB construction during construction.

The central monitoring system 60 stores the waveform, the reception time, the calculated lead length and the liquid pipe length of the reflected pulse signal received for each liquid pipe in the initial position data field of the pipe network database 66 (step S150). When the reflection pulse signals for the paths of the plurality of liquid tubes are received, the reception time may calculate and store data for the liquid tubes. That is, in the above example, when the reflection pulse signal for the liquid pipes P1 and P2 or P1 and P5 is received, the reception time for P2 or P5 can be calculated and stored.

The central monitoring system 60 stores the initial position data in the correction position data field of the pipe network database 66 (step S155). The correction position data stored in each item of the correction position data field is data which is corrected through periodic measurement during operation of the system, and inputs initial position data as an initial value. Since each item of the correction position data is the same as the initial position data, the initial position data is input to each field of the corresponding correction position data.

The connection and measurement process of each liquid pipe (steps S115 to S155) is repeated until the entire liquid pipe network 50 is established (step S160).

The central monitoring system 60 displays the current state information of the liquid pipe network (S165). The display is via a display means when the administrator client is local, and via a web page when remotely accessed. In addition, the present state information display of the liquid pipe network is made with reference to the geographic information database 68. That is, the embedding position and the connection type of the liquid pipe and the connection pipe of the liquid pipe network are extracted from the geographic information database, and the liquid pipe and the connection pipe of the liquid pipe and the connection pipe are connected from the pipe network database 66 using the extracted liquid pipe and the connection pipe ID. Extract and display detailed information. Preferably, the state of each liquid tube of the liquid tube network is graphically represented, and a separate display is made for the administrator client to easily identify the liquid tube in which an abnormality has occurred.

13 is a flowchart of a correction position data correction and leak detection process. Referring to FIGS. 13A and 13B, a process of correcting position data for correction and leak detection has the following flow.

The central monitoring system 60 transmits a router control signal for setting a pulse signal transmission path in the liquid pipe network to correct the position data for correction (S200). The path to be set is a path for transmitting a pulse signal to correct the position data for correction, and selects one or more liquid tubes connected to the pulse tester. Routing and router control signal transmission may be made by selection and input of the manager client 80, or may be automatically performed periodically. In the case of automatic path setting, a path may be set and a control signal may be transmitted by a predetermined algorithm (hereinafter, referred to as a path setting algorithm) which periodically transmits a control signal for a predetermined path or automatically sets a path. have. The router control signal includes the router ID and the ID of the liquid pipe included in the path.

The router 150 receives the router control signal and sets a path according to the control signal (S205). Each router receives the router control signal and sets the path by turning on the connection between the conductors installed in the selected liquid tube according to the received control signal, and installed in the liquid tube on the opposite side of the path connected to the pulse tester among the selected liquid tubes. Short the conductors. For example, in the liquid pipe network as shown in FIG. 10, when the path is set from the liquid pipes P1 and P2, since the pulse signal is transmitted from P1 to P2, router R1 electrically connects the conductors of P1 and P2, and router R2 is Short the lead at the end of P2. Therefore, the pulse signal is reflected at the shorted position and received by the pulse tester.

The pulse tester 200 transmits the pulse signal through the set path and receives the reflected pulse signal (step S210), and transmits the received reflected pulse signal and the pulse tester ID (step S215). The pulse signal transmission of the pulse tester and the transmission of the received reflected pulse signal and the pulse tester ID are not performed by the control of the central monitoring system, but are performed automatically. The pulse tester automatically transmits the pulse signal periodically and transmits the received reflection pulse signal and the pulse tester ID to the central monitoring system. Therefore, when the path is established by the router, the pulse signal sent from the pulse tester is transmitted through the setting path, and the reflected pulse signal for the setting path is acquired.

The central monitoring system 60 receives the reflected pulse signal and the pulse tester ID (step S220), and calculates the lead length and the liquid tube length based on the received data (step S225).

The central monitoring system 60 extracts the position data for correction of each liquid tube included in the set path from the pipe network database 66, and calculates the lead length and the liquid tube length and the lead length and the liquid tube of the extracted position data for correction. It is determined whether the length is the same (step S230). That is, the liquid tube ID included in the set path is extracted using the received pulse tester ID as a key, and the position data for correction of each liquid tube is extracted using the extracted liquid tube ID as a key and compared with the calculation result. In the case where the liquid pipe network is constructed as shown in FIG. 10, if only the liquid pipe P1 is measured, the lead length and the liquid pipe length of P1 are calculated from the measurement results, and the correction position data for P1 is extracted and compared. In addition, when the measurement is made by setting a path to the liquid tubes P1 and P2, the lead lengths and the liquid tube lengths of P1 to P2 are calculated, and the position data for correction of P1 and P2 are extracted and compared with the calculation results. Specifically, the lead length and the liquid tube length of the correction position data of P1 and P2 are respectively summed, and the summed result is compared with the calculated result. At this time, only the liquid tube length can be compared. It is also possible to compare the reception time of the received reflected pulse signal with the reception time of the correction position data without calculating the lead length and the liquid tube length. When the lead length and the liquid tube length of the calculation result and the position data for correction are the same, the transmission speed of the pulse signal at the time of the previous measurement and the current measurement of the position data for correction is considered to be the same, so that there was no change in the surrounding environment, especially the temperature. Can be. Therefore, it is possible to determine whether the change of the surrounding environment through the comparison. In addition, when the waveform of the received reflected pulse signal is different from the waveform of the position data for correction, it is considered that the conductive wire is damaged, so it is determined whether the liquid pipe is damaged.

If the comparison result calculation step and the correction position data of step S230 is different, since the transmission speed of the pulse signal is changed due to a change in temperature or the like, the correction position data is corrected through the received data (step S235). That is, the correction position data of the selected liquid tube is corrected and the correction position data of the remaining liquid tube is corrected using the correction position data. Specifically, the lead length of the liquid pipe included in the set path is calculated using the reflected pulse signal, and the length of the liquid pipe is calculated through the calculated lead length. In addition, after extracting the rate of change by comparing the result of the calculation with the position data for correction of the liquid pipe, and extracting the position data for correction of the remaining liquid pipe from the pipe network database, the lead length and the length of the liquid pipe are calculated. Then, the calculated data is updated in each field. The calculation of the change rate and the calculation of the lead length and the liquid tube length may be made by comparison with the initial position data. Therefore, correction position data reflecting the current pulse signal transmission speed can be obtained.

The central monitoring system 60 updates and displays the current state information of the liquid pipe network 300 (step S240).

The central monitoring system 60 transmits a router control signal for setting a path for leak detection in the liquid pipe network 300 (step S245). The setting path is a section for detecting the leakage of each liquid pipe using a pulse signal. The routing and transmission of the router control signal may be made by selection and input of the administrator client 80 or may be automatically made by the routing algorithm. The router control signal includes the router ID and the ID of the liquid pipe included in the path.

The router 150 receives the router control signal and sets a path according to the control signal (step S250). Each router receives the router control signal and connects each of the conductors installed in the liquid pipe selected according to the received control signal. Set the path by turning on and short the lead of the liquid pipe located at the end of the set path.

The pulse tester 200 transmits a pulse signal through a set path and receives a reflected pulse signal (S255).

The pulse tester 200 transmits the received reflection pulse signal and the pulse tester ID (step S260).

The central monitoring system 60 receives the reflected pulse signal and the pulse tester ID, analyzes the reflected pulse signal with reference to the pipe network database 66 (step S265), and determines whether an abnormality has occurred in the liquid pipe ( S270 step). That is, the liquid tube ID included in the setting path is extracted by using the received pulse tester ID as a key, the position data for correction of each liquid tube is extracted by using the extracted liquid tube ID as a key, and the reflected pulse in the normal state of the position data for correction is extracted. The damage of the liquid tube is determined by comparing and analyzing the signal waveform and the waveform of the received reflected pulse signal.

When an abnormality occurs in step S270, that is, when there is an abnormality in the waveform of the reflected pulse signal, the damage type and the damage position are calculated (step S275). The damage position is calculated from the position on the liquid tube.

The central monitoring system 60 stores the calculated damage type and damage location in the pipe network database 66 to update the liquid pipe information (step S280).

The central monitoring system 60 updates the display screen of the current state information of the liquid pipe network (S285). In addition, the central monitoring system transmits a warning message to the manager client 80, and the manager client identifies and repairs the damaged liquid pipe through the warning message or the display screen.

14 is an exemplary diagram of data correction of a leak detection system of a liquid tube, in which FIG. 14A is an example diagram of correcting data by testing one liquid tube, and FIGS. 14B and 14C show data by testing two selected liquid tubes. An example diagram for correcting. As shown in Figures 14a to 14c, the leak detection system of the liquid pipe according to the present invention for selecting and testing one or more liquid pipes periodically during the operation of the liquid pipe network, through the test results for correction stored in the pipe network database Update the location data. Preferably one liquid tube is selected and tested.

Each is demonstrated as follows.

In the case of Fig. 14A, the router R1 shorts the conducting wires installed in P1 by the control signal transmitted from the central monitoring system. When the pulse signal is sent from the pulse tester T1, the sent pulse signal S1 is reflected at the shorted position A1 and the reflected pulse signal RS1 is received by the pulse tester. When the pulse tester transmits the pulse tester ID and the reflected pulse signal to the central monitoring system, the central monitoring system calculates the lead length and the liquid pipe length of P1 based on the received data, and sends the liquid pipe (P1) from the pipe network database. Information is extracted and the calculated results are compared with the calibration position data. The central monitoring system may compare the reception time of the received reflected pulse signal with the reception time of the correction position data. Since the length of the wire is calculated through the reception time of the reflected pulse signal, if the reception time is the same, the transmission speed of the pulse signal is the same, so the pipe network database is not updated. However, when the reception time is different, correction position data is corrected.

In the case of FIG. 14B, the router R1 electrically connects the conducting wire provided in P1 and the conducting wire provided in P2, and the router R2 shorts the conducting wire provided in P2. When the pulse signal S2 is sent from the pulse tester T1, the transmitted pulse signal is reflected at the shorted position A2 and the reflected pulse signal RS2 is received by the pulse tester. The central monitoring system receives the pulse tester ID and the reflected pulse signal from the pulse tester and calculates the lead length and the liquid tube length from the received data. Thereafter, the position data for correction for the liquid pipes P1 and P2 are extracted from the pipe network database and compared with the calculation result. Specifically, the lead lengths and the liquid tube lengths of P1 and P2 included in the extracted position data for correction are added together, and the calculation results are compared with the sum results. If the calculation result is different from the summation result, the correction position data for each liquid pipe is corrected.

In the case of Fig. 14C, router R1 electrically connects the conductors provided in P1 and the conductors provided in P5, and the router R4 shorts the conductors provided in P5. When the pulse signal S3 is sent out from the pulse tester T1, the sent pulse signal is reflected at the shorted position A3 and the reflected pulse signal RS3 is received by the pulse tester. The data correction method is as described above.

15 is a diagram showing the structure of a pipe network database. FIGS. 15A and 15B are liquid pipe information tables, and FIG. 15C shows only fields important as a connector pipe information table. Each applies the liquid tube network shown in FIG.

As shown in Figs. 15A and 15B, the liquid pipe information table stores information of each liquid pipe and the installed conductors. The liquid pipe information table stores initial position data and correction position data of the reception time and lead length for each liquid pipe. The data stored in the liquid pipe length field and the lead length field are the data input before the liquid pipe network installation, and the data stored in the reception time field, the lead length field and the liquid pipe length field of the initial position data field are the liquid pipe network installation. Measured and calculated data. The data stored in the reception time field, the lead length field, and the liquid pipe length field of the correction position data field are data that are periodically measured and corrected during the operation of the liquid pipe network. The data stored in the lead length field and the liquid pipe length field of the initial position data field is larger than the data stored in the lead length field and the liquid pipe length field. This is because it includes the length of the conductor installed in the tube. In addition, the correction position data field is updated by periodically selecting one or more liquid tubes to send, receive, and analyze a pulse signal.

For example, when the measurement is made with respect to the liquid pipe P1 and the correction position data before the measurement is the same as the initial position data, it can be seen that the reception time is increased by 0.18 seconds and the length of the liquid pipe lead is increased by 1.8 m. Therefore, +1/50 is calculated as a change rate with respect to the reception time and the lead length, and the correction position data is corrected by applying it to another liquid pipe.

As described above, the present invention accurately pinpoints the position of the liquid tube which is complicatedly buried underground, detects whether the liquid tube is leaked due to breakage or damage of the liquid pipe, and accurately calculates the position of the breakage or damage, There is a remarkable effect that it is possible to grasp the channel condition of the network consisting of liquid tubes at once.

In other words, the leak detection system and method of the liquid pipe according to the present invention have the following effects.

First, when the liquid pipe is used as a water supply pipe, it is possible to know exactly where the water leak is due to the breakage or damage of the water supply pipe buried underground, thereby preventing the waste of water resources and reducing the cost and manpower required for repair and recovery. Can be saved. In other words, by quickly and accurately identifying and responding to the failure of the water supply pipe, it is possible to prevent waste of water resources due to leakage, and by accurately identifying the location of the water supply pipe where the failure occurs, greatly reducing the cost and manpower required for replacement and repair. can do.

Secondly, it is possible to prevent damage during transportation of the liquid pipe, and to easily connect and install by cutting the length required when installing the liquid pipe or when replacing some broken liquid pipe, and the liquid pipe is a steel pipe or PE pipe. Applicable to all.

Third, the pulse signal is automatically controlled through a separate terminal, and information about the leakage and location of the liquid pipe is displayed or transmitted to the central management center, so that the administrator can display the liquid pipe through the display of the terminal. This can reduce the cost and manpower associated with managing and restoring liquid pipes by identifying the condition of the pipe and taking appropriate action.

Finally, when the liquid pipe is used as a water supply pipe, it is possible to collectively identify the location of each water supply pipe constituting the entire water supply network, and whether or not the water leak is caused by breakage or damage of each water supply pipe. The cost and manpower can be greatly reduced. That is, it is possible to collectively manage the entire water supply pipe and to know whether the water supply pipe leaks and the location of the leak in real time, thereby reducing the cost and manpower required for the inspection and recovery of each water supply pipe.

Although the present invention has been described mainly with respect to the liquid pipe, the spirit of the present invention is not limited thereto, and of course, it can be applied to the gas pipe for transporting gas. In addition, although the present invention has been described in terms of preferred embodiments of the present invention using specific terms, such description is for illustrative purposes only, and various changes and modifications may be made without departing from the spirit and scope of the following claims. It should be understood as possible.

Claims (12)

delete delete delete As a liquid pipe for leak detection, A liquid pipe configured to have a pipe shape having a predetermined thickness t composed of an inner surface and an outer surface, the liquid flowing through a hollow inner space formed by the inner surface; A pair of conductive wires provided between the inner circumferential surface and the outer surface and buried in a spiral shape while maintaining a predetermined distance from the outer surface at a depth less than t / 2; An insertion groove formed in the outer surface of the point where the conductive line is embedded and formed in a recessed shape so that the embedded conductive line is exposed; And And an electrical connection device connected to the conductive wire exposed to the insertion groove for electrically connecting the conductive wires between neighboring liquid tubes. delete delete delete delete As a drain pipe that is easy to detect leaks, It is formed while joining the neighboring PE line while rotating the PE line provided in a line shape spirally, The vertical cross section cut perpendicular to the longitudinal direction of the PE line A pair of wires and an outer layer of the first PE layer filled with the first PE layer and the first PE layer formed to form a boundary surface, and between the filler and the filler being inserted insulated from each other in an insulated state. Comprising a second PE layer provided, characterized in that the melting point of the second PE layer is formed lower than the first PE layer. As a liquid pipe for leak detection, It is formed of a cast iron material formed by pouring a casting in the mold, and has a pipe shape having a predetermined thickness t consisting of the inner surface and the outer surface, the hollow inner space formed by the inner surface of the liquid pipe flowing liquid; A concave groove of a predetermined depth that is concave in a continuous spiral form along the outer surface of the liquid tube; And The liquid pipe for leak detection provided with a concave groove having a predetermined depth formed in the spiral shape and having a pair of conductive wires having a thickness of 1 mm or less. The method of claim 10, Leak detection liquid tube, characterized in that the conductive wire is coated with tar. As a liquid pipe for leak detection, It consists of a steel pipe rolled and welded to a steel plate, and has a pipe shape having a predetermined thickness consisting of an inner surface and an outer surface, the liquid tube flowing liquid into the hollow inner space formed by the inner surface; A protective layer formed of polyethylene or polyvinyl and coating the entire outer circumferential surface of the liquid tube to a predetermined thickness t; And It is formed in a depth of t / 2 or less from the outside of the protective layer, the thickness is 1mm or less, characterized in that it comprises a pair of conductive wires wound in a spiral shape at a uniform pitch while maintaining a constant distance to each other Leak detection liquid pipe.