KR20030070416A - Liquid pipe for detecting water leakage and establishing method - Google Patents

Abstract

PURPOSE: A liquid pipe for detecting leak and an installation method are provided to reduce water waste and repair expenses by detecting leakage from breakage or damage of the liquid pipe and calculating the position of breakage or damage accurately with using the liquid pipe as the waterworks pipe. CONSTITUTION: A leak detecting liquid pipe is composed of a liquid pipe(20) having an inlet and an outlet and flowing liquid in a cavity; a lead wire arranged along the outer periphery of the liquid pipe to detect leakage between the inlet and the outlet; and a coating film(24) spread on the lead wire around the liquid pipe. The lead wire is formed spirally, and the coating film is made of polyethylene. An insertion groove is formed in the coating film to expose the lead wire. A connection member is fitted to the insertion groove, and electrically connected to the lead wire.

Description

Liquid pipe for leak detection and installation method {LIQUID PIPE FOR DETECTING WATER LEAKAGE AND ESTABLISHING METHOD}

The present invention relates to a liquid pipe for leak detection, and in more detail, one or more conductors are inserted or fixed to be installed, and a pulse tester sends out a pulse signal and inspects a received signal to detect leaks. The present invention relates to a liquid pipe for leak detection that can be used as a water supply pipe.

Currently, about 20% of leaked water is leaked because the old water pipe is not replaced. This not only wastes money, but also implies the possibility of water pollution from inhalation of foreign matter or bacteria from the leak location. Therefore, it is necessary to know the leak location and replace the old water pipe. 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 rods 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 when the leak occurs.

The method of using sound waves or using a moisture sensor is a pipe-attached method, and when a leak occurs, it can be immediately known through an alarm signal, which can be used as a concept such as online monitoring.

However, since the soil itself contains moisture, it is not easy to install a moisture sensor outside the pipe.

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. Use a phenomenon that does not progress. 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.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a leak detection liquid pipe that is easy to detect leaks.

Further, another object of the present invention is to provide a method of installing a liquid pipe for leak detection.

1 is a perspective view of a leak detection liquid tube shown in Korean Patent Application No. 10-2001-0039437.

Figure 2 is a perspective view showing a state before the liquid pipe for leak detection according to the present invention is connected.

Figure 3 is a perspective view showing a state in which the liquid pipe for leak detection according to the present invention is connected.

4 is a view showing a state of the connection member according to the present invention.

5 is a flowchart illustrating a process of connecting a liquid pipe for leak detection according to the present invention.

6 is an exemplary embodiment of leak detection of a leak detection liquid pipe according to the present invention;

7 is a flow chart showing a leak detection process of the liquid pipe for leak detection according to the present invention.

*** Explanation of symbols on the main parts of the drawing ***

10, 20: liquid pipe 11, 22: lead wire

12: connection 13: protective cap

14: inserting portion 24: coating film

26: connection band 28: connection line

30 connection member 32 support mechanism

33: binding hole 34: connection plate

36: set screw 40: pulse tester

45: receiver

In order to achieve the above object, the leak detection liquid pipe according to the present invention, the liquid pipe having an inlet and an outlet and the liquid flows into the hollow inner space; At least one conducting wire provided along an outer circumferential surface of the liquid pipe to detect a leak between the inlet and the outlet; And a coating film applied over the conductive line along the outer circumferential surface of the liquid tube.

Preferably, the conductive wire is provided in a spiral, characterized in that the coating film is a PE coating film.

More preferably, an insertion groove having a predetermined size is formed at a predetermined position of the coating film so that the conductive wire is exposed at the lower portion, and is further provided with a connecting member inserted into and fixed to the insertion groove and electrically connected to the conductive wire. A support mechanism having a screw hole in the upper surface and at least one longitudinal opening in the side thereof; A connection plate having at least one latch fastened to the binding hole, and having a vertical movement along the binding hole and contacting the conductive wires; And a fixing screw made of a conductor by fixing the connecting plate by inserting and lowering the screw hole to support the upper surface of the connecting plate.

In addition, the connecting member is connected to the head of the fixing screw and fixed, characterized in that it further comprises a connecting line made of a conductor.

In addition, in order to achieve the above another object, the installation method of the leak detection liquid pipe according to the present invention, the connecting step of connecting two liquid pipes; And a connecting step of electrically interconnecting each conductor of the two liquid tubes.

Preferably, the connecting step, the punching step of forming an insertion groove so that the conductive wire is exposed to the lower portion at a predetermined position of the coating film; A connection end installation step of installing a connection end electrically connected to the conductor in the insertion groove; And a connecting end connecting step of electrically connecting the respective connecting ends of the two liquid tubes.

More preferably, the connection end connection step includes: a connection line connection step of connecting a connection line made of a conductor to each connection end; And it characterized in that it comprises a connecting line connecting step for electrically connecting each connecting line.

In order to solve the above-mentioned problems, the present applicant has already filed a Korean Patent Application No. 10-2001-0039437 for a leak detection liquid pipe capable of detecting a location of leakage by sending a pulse signal. .

An embodiment of the patent application invention is shown in FIG. 1. 1 is a perspective view of a leak detection liquid tube shown in Korean Patent Application No. 10-2001-0039437, Figure 1a shows a state before the two liquid tubes 10 according to the present invention is connected, Figure 1b Shows a state in which two liquid tubes 10 according to the present invention are connected.

As shown in FIG. 1, the present invention provides two wires 11 through which a pulse signal can be transmitted, spirally wound around the outer circumferential surface of the liquid pipe 10, and provided at both side ends of the liquid pipe. It fixed to the male threaded connection part 12, and connected each lead at the time of connecting both liquid tubes. That is, the conductive wire 11 is passed through the hole provided in the connecting portion 12, wound along the outer circumferential surface of the connecting portion 12, and fixed by covering the protective cap 13, and then fixed to each conductive line 11 of both liquid pipes 10. The liver was connected. When the wires are connected and the liquid tube is installed, the pulse tester sends out a pulse signal to the wires to determine the state of the wires. That is, when a leak occurs in the liquid pipe, the wire is damaged or broken by water pressure or flooding of the wire, so that the state and abnormality of the wire can be tracked through the received pulse signal. Can locate the pipe.

However, in the case of the patent application invention, there is a problem that the connection part and the like may be damaged when the liquid pipe is transported. In addition, when installing a liquid pipe or when replacing a partially broken liquid pipe, it is usually used to cut the liquid pipe to the required length, in this case the problem that can be used because the connection portion 12 provided on both sides is cut off There was this.

Accordingly, the present applicant proposes an improved present invention that solves the above problems.

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

Figure 2 is a perspective view showing the state before the leak detection liquid pipe is connected according to the present invention, Figure 3 is a perspective view showing a state of the leak detection liquid pipe is connected according to the present invention. As shown in Figures 2 and 3, the leak detection liquid pipe according to the present invention, is provided with one or more conductors 22 fixed to the outside or inserted into the inside, the connection member 30 is installed at both ends do. Preferably, two conductive wires 22 are provided and formed in a spiral shape.

The liquid pipe 20 according to the present invention is a pipe through which liquid flows into the inner space, and may be used as a water supply pipe or a sewer pipe. When the liquid pipe 20 is used as a water pipe, it is possible to use a water pipe that is generally used today. That is, steel pipes, cast iron pipes, PE (Poly Ethylen) pipes, Hi-3P impact water pipes, stainless steel pipes and PE steel pipes. Each tube is easily understood by those skilled in the art to which the present invention pertains, and a detailed description thereof will be omitted.

The liquid pipe 20 is actually used to connect the liquid pipe 20 of a predetermined length at the time of installation, while connecting the connecting band 26, such as tape, to the intermediate point in the state in which both liquid pipes. In addition, it is possible to attach a waterproof dedicated connector (not shown) that can prevent leakage to the connection portion between the liquid pipe (20).

The liquid pipe 20 is provided with a conductive wire 22 on the outside or inside.

When the liquid pipe 20 is a steel pipe or the like, the wire 22 is spirally wound along the outer circumferential surface of the liquid pipe 20 and then PE coated. Preferably a five coat of PE1, PE2, PE3, PE4 and PE5. Therefore, as shown in the cross-sectional view A-A 'at the lower right of FIG. 2, the conductive wire 22 is fixed between the liquid pipe 20 and the PE coating film 24.

In addition, when the liquid pipe 20 is a PE pipe, the double wall pipe can be formed by winding the conductive wire 22 along the outer circumferential surface of the completed PE pipe like PE steel and applying PE coating. In addition, the lead wire 22 can be wound directly along the outer circumferential surface of the PE pipe coming out of the injection mold. At the moment coming out of the injection molding mold, since the PE tube is not completely hardened, the conductive wire 22 is inserted into the molded PE tube.

At the time of installation of the conductive wires 22, a constant gap is maintained between the conductive wires 22. That is, it installs, maintaining a predetermined space | interval so that the conductive wire 22 may cover many areas of the liquid pipe 20, without affecting crosstalk or the like.

The conductive wire 22 according to the present invention uses a thin conductive wire. This is to allow the wire 22 to be submerged when the wire 22 is broken by water pressure when the damage occurs to the liquid pipe 20, or when the liquid pipe 20 leaks. In addition, the material of the conductive wire 22 is determined according to the material of the liquid pipe (20). In general, although copper wire is used, since the liquid pipe 20 is a cast iron pipe, the liquid pipe 20 itself is well connected, and thus nichrome wire is used.

In addition, one or more conductive wires 22 may be provided. Preferably, two conductive wires 22 are provided to efficiently detect breakage of the liquid pipe 20.

The connection member 30 according to the present invention is inserted into a predetermined groove (hereinafter referred to as an 'insertion groove') formed at one end of the liquid pipe 20, and is connected to the conductive wire 22 to form a liquid. The connection of the pipe 20 serves to connect the respective conductive wires 22 of both liquid pipes. That is, it serves as a connection end for electrically connecting the respective conductive wires 22 of both liquid pipes 20.

The connecting member 30 according to the present invention includes a support mechanism 32 for supporting the movement of the connecting plate 34 and the fixing screw 36, and one or more longitudinally provided at both sides of the support mechanism 32. The fastening latches fastened to the hole 33 and the fastening hole 33 are provided at both ends, and are inserted into the screw holes formed on the upper surface of the connecting plate 34 and the support mechanism 32 which are fastened up and down by the fastening hole. A fixing screw 36 for supporting and fixing the upper surface of the plate 34 is provided. The connecting plate 34 and the fixing screw 36 are formed of a conductive conductor, and preferably formed of the same material as the conductive wire 22.

The installation method of the connection member 30 is as follows.

An insertion groove on the upper portion of the conductive wire 22 by using a mechanism (hereinafter, referred to as a 'punching mechanism') that can form a groove by drilling the PE coating film 24 on the outside of the liquid pipe 20 into a predetermined shape. To form. Since the portion where the conductive wire 22 is located in the PE coating film 24 is slightly protruded compared to other portions, the position of the conductive wire can be easily determined. Therefore, the PE coating film 24 at the position where the conductive wire 22 is located is drilled by the punching mechanism. At this time, when the punching mechanism penetrates the PE coating layer 24 and reaches a predetermined depth, the punching mechanism contacts the conductive wire. Since the material of the conductive wire is metal, the punching mechanism cannot penetrate any more and only the PE coating layer 24 of the upper portion of the conductive wire is dug up. Therefore, the insertion groove is formed above the conductive wire 22.

When the insertion groove is formed, the connecting member 30 is inserted into the inside, and the lower end of the connecting member is fixed with an adhesive, and the fixing screw 36 is lowered to connect the connecting plate 34 to the conductive wire 22. Secure with. The head of the fixing screw 36 connects a connecting line 28 made of a conductor. Preferably, the connecting line 28 is formed of the same material as the conductive wire 22. Accordingly, the conductive wire 22 is electrically connected to the connecting line 28 through the connecting member 30.

The connection member 30 is provided for each conducting wire 22 at one end of both liquid pipes 20.

When the connection member 30 is installed, each connection line 28 connected to each connection member 30 of both liquid pipes 20 is connected and electrically connected. Preferably, the connecting line 28 is spirally wound along the outer circumferential surface of the connected liquid pipe 20. Installation of the connection member 30 may be made after both liquid pipes 20 are connected.

Therefore, since the conductive wires 22 of the two liquid pipes 20 are electrically connected, the pulse signal can be transmitted from one side to the opposite side.

Figure 4 is a view showing a state of the connection member according to the present invention, Figure 4 (a) is a perspective view of the connection member, Figure 4 (b) is a cross-sectional view of the state in which the connection member is inserted into the coating film.

As shown in FIG. 4, the connection member 30 according to the present invention is inserted into an insertion groove formed at one end of the liquid pipe 20, and the bottom end of the PE coating film of the liquid pipe 20 by an adhesive or the like ( It is installed by being fixed to 24). Preferably, the size of the connection member 30 is the same as the size of the insertion groove. That is, by making the cross-sectional area of the connection member 30 the same as the cross-sectional area of the insertion groove, the connection member 30 is prevented from moving or leaving the inside of the insertion groove, and the height is the same as the depth of the insertion groove to the outside of the insertion groove. Prevent protruding.

When the connecting member 30 is installed, the fixing screw 36 is inserted and lowered through the screw hole formed in the upper surface of the support mechanism 32 to bring the connecting plate 34 into close contact with the conductive wire 22. In forming the insertion groove by using the punching mechanism, since the punching mechanism removes the PE coating layer 24 to the position of the conductive wire 22, the conductive wire is exposed to the lower portion of the insertion groove. In addition, since the connecting plate 34 moves up and down along the binding hole 33 on the side of the support mechanism 32, the connecting plate 34 descends to be in contact with the conductive wire 22 to form an electrical connection. The set screw 36 prevents the connecting plate 34 from coming into contact with the conductive wire 22. Therefore, the electrical connection state of the connection plate 34 and the conducting wire 22 can be maintained.

A connecting line 28 made of a conductor is connected to the head of the fixing screw 36. Preferably, the connection wire is wound around the lower part of the head of the fixing screw 36, and the connecting wire is fixed by inserting the fixing screw 36 into the screw hole of the upper surface of the support mechanism 32. The connection work of the connecting line 28 may be performed at any time during the installation process of the connecting member 30.

When the connection member 30 and the connection line 28 of the two liquid pipes are installed, the connection lines 28 connected to the connection members 30 of both liquid pipes 20 are connected and electrically connected to each other. Preferably, the connecting line 28 is spirally wound along the outer circumferential surface of the liquid pipe 20.

The connecting plate 34, the fixing screw 36 and the connecting line 28 are formed of a conductive conductor, preferably made of the same material as the conductive wire 22. The support mechanism 32 can also be formed of a conductor such as the same material as the conductor wire 22.

Accordingly, the conductive wire 22 is in electrical connection with the connecting plate 34, the fixing screw 36 and the connecting line 28, and electrical signals such as pulse signals transmitted to the conductive wire 22 are connected to the connecting plate 34. It is transmitted to the connecting line 28 via the fixing screw 36. In addition, the signal transmitted to the connecting line 28 is transmitted to the conductive wire 22 via the connecting line 28, the fixing screw 36 and the connecting plate 34 of the other liquid pipe 20. In other words, the conductive wires 22 of the connected liquid pipes 20 are electrically connected to each other.

5 is a flowchart illustrating a process of connecting a liquid pipe for leak detection according to the present invention. 5, the connection process of the leak detection liquid pipe according to the present invention is as follows.

The insertion groove is formed in the PE coating film 24 of the liquid pipe 20 according to the present invention. (Step S100) The PE coating film of the portion where the conductive wire 22 is located in the lower part of the PE coating film 24 of the liquid pipe 20. Using the punching mechanism, the hole 24 is excavated to a depth such that the conductive wire 22 is exposed to form an insertion groove. That is, the portion in which the conductive wire 22 is located at the lower part is slightly protruding compared to other portions, and thus detects it and forms an insertion groove in the corresponding portion. The insertion groove is formed to a size such that the connection member 30 can be inserted.

Inserting the connection member 30 in the insertion groove formed, and fixed the lower end of the connection member 30 using an adhesive. (Step S110)

The connecting plate 34 is fixed in contact with the conductive wires 22 (step S120). The fixing screw 36 is inserted into the screw hole provided on the upper surface of the support mechanism 32 to lower the connecting plate 34. By holding and fixing the upper surface, the state of contact with the conductive wire 22 is maintained.

The connection line 28 is connected to the head of the fixing screw 36. (Step S130) The connection of the connection line 28 may be made in any of the above steps.

The liquid pipes 20 are connected to each other, and each connection line 28 connected to each connection member 30 of both liquid pipes 20 is connected to each other and electrically connected to each other (step S140). Spirally wound along the outer circumferential surface of the connected liquid tube 20.

6 is an exemplary embodiment of leak detection of a leak detection liquid pipe according to the present invention. As shown in Fig. 6, the leak detection of the leak detection liquid tube according to the present invention is performed by sending a pulse signal to the conductive wire 22 using the pulse tester 40.

6 (a) shows a first embodiment with a pulse tester 40 and a receiver 45, and FIG. 6 (b) shows a second embodiment with a pulse tester 40 only. That is, in the case of FIG. 6A, the pulse signal transmitted from the pulse tester 40 is received through the receiver 45, and in the case of FIG. 6B, the pulse signal transmitted from the pulse tester 40 is a lead wire. The pulse tester 40 receives the reflected pulse reflected at the end of.

The pulse tester 40 is a mechanism for measuring the unevenness of the cable impedance, disconnection, short-circuit and failure of the cable, the distance of the failure point of the cable, and the like. A pulse tester is a mechanism which sends a pulse signal to a fault core wire, receives the reflection pulse from a fault point, and measures a fault position by the time. The fault location is calculated by equation (1).

l is the distance to the failure point, v is the propagation speed of the pulse signal, and t is the reception time of the reflected pulse.

Pulse signals used in the pulse tester include square waves, sawtooth waves or sinusoidal square waves, 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 12.5 km, that is, about 25 km in a round trip. Therefore, in the case of leak detection according to the present invention, when the wire is formed in a spiral, it can be inspected every 6 to 7 km of liquid pipe. Since the propagation speed of the pulse signal is 290 (m / kV), the repetition period T is calculated as in Equation 2.

In addition, the repetition frequency fr is shown in Equation 3.

However, the repetition frequency of the pulse tester is 5 [kHz], which is less than 11.6 [kHz], so the condition is satisfied.

In addition, the pulse tester can determine the state of the cable according to the waveform of the reflected pulse. That is, it is possible to grasp disconnection (opening), crosstalk (shorting), immersion and crosstalk.

Therefore, in the case of leak detection using the liquid pipe according to the present invention as a water pipe, it is possible to grasp the fault state by the waveform of the reflected pulse and measure the fault position 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 damaged, 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.

In addition, the pulse tester 20 continuously transmits a pulse signal, receives and inspects a reflected wave, and transmits a result value to a central center that manages the entire water supply facility through the Internet or a wired or wireless communication network. The central center remotely reads meter readings from each pulse tester to determine and display the status of the entire water supply network.

6 (a) receives the pulse signal transmitted from the pulse tester 40 through the receiver 45. In the case of FIG. 6A, when the liquid pipe 20 is completely broken and the conductive wire 22 is opened, the pulse signal is reflected at the open position and the reflected pulse is received by the pulse tester 40. That is, when the pulse signal is not received by the receiver 45, it can be determined that the conducting wire 22 is opened, that is, the liquid pipe 20 is completely damaged. In addition, the broken time can be identified through the reception time of the reflected pulse.

In addition, when not completely damaged, since the pulse signal is received by the receiver 45, the state of the liquid pipe 20 can be grasped according to the waveform of the received pulse signal.

6 (b) shows that the pulse signal transmitted from the pulse tester 40 is reflected because the end of the connecting line 28 is grounded, and the pulse tester 40 receives the reflected pulse. Therefore, the state of the liquid pipe 20 can be grasped through the waveform of the reflected pulse, and the failure position can be calculated through the reception time when a failure occurs.

7 is a flowchart illustrating a leak detection process of the leak detection liquid pipe according to the present invention. Referring to Figure 7, the leak detection process of the leak detection liquid tube according to the present invention has the following flow.

The pulse signal is sent from the pulse tester 40 according to the present invention to the conducting wire 22 and the connecting line 28 (step S200).

The pulse signal transmitted through the conductive wire 22 and the connecting line 28 according to the present invention is received. (Step S210) In the case of the first embodiment shown in FIG. 6 (a), the receiver 45 receives the pulse signal. In the second embodiment shown in FIG. 6B, the pulse tester 40 receives the pulse signal reflected at the end of the connecting line 28. In addition, in the first embodiment, when the conductive wire 22 and the connecting line 28 are disconnected in the middle, that is, when the liquid pipe 20 is broken, the pulse signal does not proceed any more and is reflected at the disconnected position. The pulse tester 40 receives the pulse signal.

Analyze the waveform of the received pulse signal according to the present invention. (Step S220) As described above, when an abnormality occurs in the conductive line 22 and the connecting line 28 through which the pulse signal passes, the waveform of the pulse signal is changed. The waveform of the pulse signal indicates the state of the conductive line 22 or the connecting line 28.

It is determined whether an abnormality has occurred in the conductive wire 22 or the connecting line 28 through the analysis of the step S220. (Step S230) Since the conductive wire 22 and the connecting line 28 are installed in the liquid pipe 20, the liquid pipe If an abnormality occurs in the (20), it also affects the conductive wire 22 and the connecting line (28). Therefore, the abnormality in the conductive wire 22 or the connection line 28 means that the abnormality in the liquid pipe 20.

When the abnormality occurs in step S230, the damage type of the liquid pipe 20 is analyzed through the state of the lead wire 22 or the connection line 28 (step S240), that is, the lead wire 22 and The state of the connecting line 28 is analyzed, and the state of the liquid pipe 20 is analyzed through the states of the conductive line 22 and the connecting line 28. As described above, when the conductive wire 22 or the connecting line 28 is disconnected (opened), the liquid pipe 20 is completely damaged, and when the conductive wire 22 or the connecting line 28 is cross-talked (shorted), the liquid pipe ( 20, it is determined that the liquid pipe 20 is leaked when the construction failure, the lead wire 22 or the connection line 28 is flooded.

The damage position is calculated through the reception time of the pulse signal according to the present invention (step S250). That is, the damage position of the conductive wire 22 or the connection line 28 may be calculated through the reception time of the pulse signal, 22) or the damage position of the connecting line 28 to calculate the damage position of the liquid pipe 20.

The damage type and the damage location calculated in steps S240 and S250 may be output through a predetermined output means (step S260). That is, the display unit may display the result or control and manage the entire installed liquid tube. Send results to the center.

If the abnormality does not occur in step S230, since there is no damage to the liquid tube 20, the result is displayed or transmitted to the central center (step S270).

The determination of whether the liquid pipe 20 is damaged, the damage position calculation and the result output are performed by a predetermined terminal. The terminal analyzes the waveform of the pulse signal received or reflected through the pulse tester 40 or the receiver 45 to detect the leakage of the liquid tube 20, and the liquid tube 20 through the reception time of the pulse signal. And a predetermined module for calculating a fault location of the apparatus, and means for transmitting or displaying the calculation result.

As described above, the present invention has a remarkable effect of detecting whether the liquid pipe is leaked due to breakage or damage, and accurately calculating the position of breakage or damage.

In addition, when the liquid pipe according to the present invention is used as a water pipe, it is possible to accurately know whether or not the location of the water leak due to the breakage or damage of the water pipe buried underground, so as to prevent the waste of water resources and to repair and repair Can save manpower.

In other words, by quickly 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, the cost and manpower for replacement and repair can be greatly reduced. have.

In addition, the present invention can prevent damage during transportation of the liquid tube, can be easily connected and installed by cutting to the length required when installing the liquid tube or when replacing some broken liquid tube. In addition, the present invention is applicable to both the liquid pipe is a steel pipe or PE pipe.

While the preferred embodiments of the present invention have been described using specific terms, such descriptions are for illustrative purposes only, and it is understood that various changes and modifications may be made without departing from the spirit and scope of the following claims. Should be done.

Claims (9)

As a liquid pipe for leak detection, A liquid tube having an inlet and an outlet and allowing liquid to flow into the hollow interior space; At least one conductive line provided along an outer circumferential surface of the liquid pipe to detect a leak between the inlet port and the outlet port; And Leak detection liquid tube characterized in that it comprises a coating film applied over the conductive line along the outer peripheral surface of the liquid tube. The method of claim 1, Leak detection liquid pipe, characterized in that the conductive wire is provided in a spiral. The method of claim 1, Leak detection liquid tube, characterized in that the coating film is a PE coating film. The method of claim 1, At a predetermined position of the coating film, an insertion groove having a predetermined size is formed to expose the conductive wire at a lower portion thereof. And a connection member inserted into and fixed to the insertion groove and electrically connected to the conductive wire. The method of claim 4, wherein The connecting member, A support mechanism having a screw hole in an upper surface thereof and having at least one longitudinal opening at least one binding hole in a side surface thereof; A connection plate having at least one latch fastened to the binding hole, the connecting plate being vertically moved along the binding hole and contacting the conductive wire; And And a fixing screw made of a conductor by fixing the connecting plate by lowering the screw hole to support the upper surface of the connecting plate. The method of claim 5, The connecting member, Leakage detection liquid pipe, characterized in that the connection screw is fixed to the head of the fixing screw, further comprising a connecting line made of a conductor. The method of installing the liquid pipe for leak detection according to claim 1, Connecting two liquid pipes; And And a connecting step of electrically connecting the respective wires of the two liquid tubes to each other. The method of claim 7, wherein The connection step, A punching step of forming an insertion groove at a predetermined position of the coating film so that the conductive wire is exposed at a lower portion thereof; A connection end installation step of installing a connection end electrically connected to the conductive wire in the insertion groove; And And a connection end connecting step of electrically connecting the respective connection ends of the two liquid pipes. According to claim 8, The connection stage connection step, A connection line connection step of connecting a connection line made of a conductor to each connection end; And And a connecting line connecting step of electrically connecting the connecting lines to each of the connecting lines.