KR20230041903A - Liquid pipe for detecting leak and pipe system using the same - Google Patents

Abstract

The present invention relates to a liquid pipe for leak sensing and a piping system using the same. The liquid pipe for the leak sensing of the present invention comprises: a cylindrical body including the interior surface and the exterior surface, having a predetermined thickness between the interior surface and the exterior surface, extending in the longitudinal direction, and having a first end part and a second end part in the longitudinal direction; a plurality of first conducting wires, between the interior surface and the exterior surface, embedded in a straight or spiral shape in the longitudinal direction, and exposed at the first end part and the second end part; at least one second conducting wire, between the interior surface and the exterior surface, buried in parallel with the plurality of first conducting wires and exposed at the first end part and the second end part; and a coupling unit formed on at least one of the first end part and the second end part of the cylindrical body. At this time, the coupling unit is a protrusion unit or a concave groove formed to expose the first conducting wire or the second conducting wire. An objective of the present invention is to provide the liquid pipe for the leak sensing, which can be easily installed, and the piping system.

Description

Liquid pipe for detecting leak and piping system using the same {Liquid pipe for detecting leak and pipe system using the same}

The present invention relates to a liquid leak detection liquid pipe and a piping system using the same, and more particularly, to a liquid pipe capable of detecting a leak in a liquid pipe transporting various liquids such as a water supply/sewer pipe or an agricultural water pipe, and a piping system using the same. It is about.

Liquid pipes used for water supply/sewer pipes or agricultural water pipes are usually buried underground. Although these liquid pipes are damaged due to aging or other causes, it is not easy to determine whether or not the liquid pipe is damaged and the location of the damage because the liquid pipe is buried underground.

Accordingly, in order to detect leakage in the liquid tube, various liquid tubes for detecting leakage have been developed.

Patent Publication No. 10-2007-0050615 or Patent Registration No. 10-0462269 discloses a liquid pipe that is used by coating a wire after winding it in a spiral shape around a cylindrical pipe. However, in the prior art liquid pipe, it is difficult to uniformly coat the coating layer on the cylindrical pipe, and when the liquid pipe is transported to the construction site or installed at the construction site, there is a high risk that the coating layer is peeled off and the wire is exposed to the outside. In addition, when the liquid pipe is connected to transport the liquid by a desired distance, the construction is complicated because the conducting wires must be separately connected at the connection point of the liquid pipe.

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 and a piping system that are easy to install by embedding a conducting wire in the leak detection liquid pipe itself.

Another object of the present invention is to provide a leak detection liquid pipe and a piping system capable of facilitating the connection of the leak detection liquid pipe as well as stably electrically connecting a buried conductor.

Another object of the present invention is to provide a leak detecting liquid pipe and a piping system capable of detecting not only the occurrence of a leak but also the distance to a point where the leak occurs.

In order to achieve these and other objects, a liquid tube for detecting leakage according to one aspect of the present invention includes an inner surface and an outer surface, has a predetermined thickness between the inner surface and the outer surface, and extends in the longitudinal direction, a cylindrical body having a first end and a second end in the longitudinal direction; a plurality of first conducting wires embedded between the inner surface and the outer surface in a straight or spiral shape in a longitudinal direction and exposed at first and second ends; at least one second conducting wire buried between the inner surface and the outer surface in parallel with the plurality of first conducting wires and exposed at first and second ends; and a coupling portion formed on at least one of the first end and the second end of the cylindrical body.

At this time, the coupling part is a protrusion or a concave groove formed to expose the first or second conducting wire.

Alternatively, the coupling portion may include a protrusion formed to expose the first or second conductive wire at the first end; and a concave groove formed at the second end so that the first or second conducting wire is exposed, and the protrusion corresponds to the concave groove and has a shape fitted into the concave groove.

Alternatively, the coupling portion is a protrusion and may be in the form of a pogo pin. That is, the protrusion is a cylindrical body portion in which a front end is closed and a rear end is open to form a space inwardly; A rear pin coupled to the inside of the rear end of the body and having an open front end; and a spring accommodated in the inner space of the body.

The coupling portion may be formed by forming a redundant conductive wire portion having exposed portions of the first conductive wire and the second conductive wire formed at a predetermined length along the circumferential direction at the first end or the second end.

Meanwhile, threads may be preferably formed on outer surfaces of the first end and the second end of the cylindrical body of the liquid tube for detecting leakage. When two or more liquid tubes for leak detection are connected, threads corresponding to the threads of the cylindrical body are connected by a connection device formed inside. The connecting device has a cylindrical portion protruding inward to match the diameter of the inner surface of the liquid tube for leak detection, a plurality of first conducting wires and at least one second conducting wire are embedded in the cylindrical portion, and a plurality of The first conducting wire and at least one second conducting wire are exposed.

Alternatively, when two or more liquid tubes for leak detection are connected, the liquid tubes for leak detection may be fixed by a fixing device. At this time, the fixing device includes a cylindrical cover surrounding the connecting portion; and a belt-type fixing part capable of fixing the lid and the liquid tube.

Meanwhile, each of the first and second conductors of the liquid tube for detecting leakage may be two. It is preferable that the resistance of the first conducting wire and the resistance per unit length of the second conducting wire are uniform, and the resistance of the first conducting wire is smaller than that of the second conducting wire. The first conductor wire is made of a copper-nickel alloy, and the second conductor wire is formed by mixing at least one of silver, CNT, and graphene.

A piping system capable of detecting leakage according to another feature of the present invention connects a plurality of liquid pipes for detecting leakage, and a plurality of first conducting wires and at least one second conducting wire are alternately arranged at equal intervals, , At one end side of the plurality of leak detection liquid tubes connected to the plurality of first conductors and at least one second conductor, connected to a control unit for supplying DC power and detecting leaks, connected to the plurality of leak detection liquids At the other end of the tube, the plurality of first conductors are electrically connected to each other.

The control unit may measure the leakage of the liquid pipe and the distance to the leakage point by using the Murray loop method. The controller includes a galvanometer connected between the plurality of first conductors; a DC power source connected between both ends of the galvanometer and at least one second conductor; It consists of a variable resistor connected between the DC power supply and one end of the galvanometer.

At this time, when the measured value of the galvanometer is out of equilibrium, whether or not liquid is leaked in the plurality of connected liquid tubes for detecting liquid leakage is detected, and the distance to the leakage point is calculated by changing the variable resistance.

In order to electrically connect the plurality of first conductors at the other end side of the plurality of leak detection liquid tubes, an end cap in which connection wires electrically connecting the plurality of first conductors to each other are embedded may be attached to the other end side. there is.

In the leak detection liquid pipe of the present invention, the first conductor and the second conductor are buried in the leak detection liquid pipe itself, so that the first conductor or the second conductor can be prevented from being damaged during construction or transportation of the liquid pipe.

In addition, when a liquid pipe for leak detection is connected to form a piping system, when the liquid pipe is connected, the buried first and second conductors are automatically electrically connected to each other, so that not only the physical connection of the liquid pipe but also the first conductor And since the electrical connection of the second conductor is secured, construction becomes very simple. That is, it is possible not only to facilitate the connection of the liquid pipe for leak detection, but also to stably electrically connect the built-in wire.

The piping system using the liquid tube for detecting leakage according to the present invention may utilize a controller using the Murray loop method to detect not only whether leakage occurs but also the distance to the point where the leakage occurs. Therefore, it is easy to utilize in a piping system having a long installation distance such as water supply/sewer pipes and agricultural water pipes.

1 is a perspective view showing a liquid tube for detecting leakage according to a first embodiment of the present invention.
2 is a view showing an example of coupling a cover to a cylindrical body.
3A to 3C are views illustrating examples in which protrusions and concave grooves are formed at first and second ends.
4 is a view explaining fixing the connected liquid pipe with a fixing device.
5A to 5C are diagrams illustrating a piping system according to a first embodiment of the present invention.
6 is a diagram illustrating an end cap used in the second end.
7A and 7B are views illustrating a liquid tube for detecting leakage according to a second embodiment of the present invention.
8A and 8B are views illustrating a liquid tube for detecting leakage according to a third embodiment of the present invention.
9 is a diagram explaining a liquid tube for detecting leakage according to a fourth embodiment of the present invention.
10 to 12 are views illustrating a liquid tube for detecting leakage according to another embodiment of the present invention.
13 is a view explaining the use of a liquid pipe inserted into an existing pipe according to embodiments of the present invention.

Hereinafter, the present invention will be described in detail so that those skilled in the art can easily practice it with reference to the accompanying drawings. Elements denoted by like reference numerals in the drawings indicate the same elements. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are used for the same or similar components throughout the specification.

Terms such as first and second may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

1 is a perspective view showing a liquid tube for detecting leakage according to a first embodiment of the present invention.

Referring to FIG. 1, the liquid tube for detecting leakage according to the present embodiment includes a cylindrical body 110 extending in the longitudinal direction, and two first conducting wires 210 embedded in the cylindrical body 110 in a straight line in the longitudinal direction. And it consists of a second conducting wire (220).

The cylindrical body 110 includes a first end 120 and a second end 130, which are both end surfaces in the longitudinal direction, and an inner surface 111 and an outer surface 112, which are the inside and outside of the cylinder, and the inner surface 111 ) and the outer surface 112 have a predetermined thickness.

The two first conducting wires 210 and the second conducting wires 220 are buried between the inner surface 111 and the outer surface 112 of the cylindrical body 110 in the longitudinal direction, and each of the first conducting wires 210 and The second conducting wires 220 are alternately arranged, and the distance between the first conducting wires 210 and the second conducting wires 220 is equal. That is, in the present embodiment, the two first conducting wires 210 and the two second conducting wires 220 are alternately arranged in a direction of 90° when viewed from the center of the circular cross section of the cylindrical body 110 .

The buried first conducting wire 210 and the second conducting wire 220 are exposed to the outside at the first end 120 and the second end 130 side.

The cylindrical body 110 is made of a pipe made of a plastic material including PVC or polyethylene, or a metal material including stainless steel, and may be formed by extrusion or injection molding.

The first conducting wire 210 and the second conducting wire 220 are conducting wires made of a conductive material including copper, aluminum, silver, CNT, graphene, or the like. It is preferable that the resistance of the first conducting wire and the resistance per unit length of the second conducting wire are uniform, and the resistance of the first conducting wire is smaller than that of the second conducting wire. Preferably, the first conducting wire 210 is made of a copper-nickel alloy, and the second conducting wire 220 may be made of a mixture of silver, CNT, graphene, or the like.

The first conducting wire 210 and the second conducting wire 220 may be formed by burying these conducting wires during extrusion or injection molding of the cylindrical body 110 . In this case, when the cylindrical body 110 is made of a non-conductive material, a conductive wire may be directly embedded, and when the cylindrical body 110 is made of a conductive material, a coated wire may be used to embed it.

Alternatively, a method of first forming the cylindrical body 110 and then inserting a wire may be used. That is, during extrusion molding or injection molding of the cylindrical body 110, a through hole having a circular or rectangular cross section is formed in the longitudinal direction at a position where the wire is to be embedded, and then a wire is inserted into the through hole of the molded cylindrical body 110. to insert

As another alternative method of embedding the wire in the cylindrical body 110, it may be formed by attaching a cylindrical cover in which the wire is embedded to a pipe for a general liquid pipe. 2 shows that a liquid pipe is formed by attaching a cylindrical cover 142 formed of a flexible material to a commercially available general cylindrical pipe 141. The first conducting wire 210 and the second conducting wire 220 are embedded and molded in the cylindrical cover 142, and a liquid pipe is formed by inserting the pipe 141 into the cylindrical cover 142. Alternatively, a cylindrical cover may be formed by dividing it into two parts along the longitudinal direction, and the liquid pipe may be formed by attaching this cylindrical cover to a pipe.

Referring back to FIG. 1 , first and second ends 120 and 130 of the cylindrical body 110 are formed with coupling parts 300 for connecting liquid pipes.

The coupling part 300 is a protruding part 310 in which the exposed portions of the first conducting wire 210 and the second conducting wire 220 at the first end 120 and the second end 130 protrude in a cross section having a predetermined shape, or It is formed as a concave groove 320 recessed into a cross section of a predetermined shape. The protruding part 310 of one liquid pipe is fitted into the concave groove 320 of another liquid pipe connected thereto, so that the first conducting wire 210 and the second conducting wire 220 of the connected liquid pipe are continuously connected to each other. can make it Cross-sectional shapes of the protruding portion 310 and the concave groove 320 are illustrated as circular, but are not limited thereto and may be formed in a polygonal shape including a quadrangular shape, a triangle shape, or an elliptical shape.

When connecting the liquid pipe by forming an O-ring groove 119 on the inner surface of the first end 120 of the cylindrical body 110, the O-ring may be inserted into the O-ring groove 119 to seal the connection portion. In the drawing, it is shown that an O-ring groove is formed on the inside of the first end 120 of the cylindrical body 110, but is not limited thereto, and the O-ring is formed on the inside of the second end 130 of the cylindrical body 110 or both. grooves can be formed.

3A to 3C are views showing an example in which protrusions and concave portions are differently formed at the first end and the second end of the coupling part, and two liquid pipes 100 and 101 are connected with reference to FIGS. 3A to 3C explain what becomes

3A shows that the first end 120 of the liquid pipe 100 has a protrusion 310 formed on the exposed portion of the first conducting wire 210 and the second conducting wire 220, and a concave groove on the second end 130. 320 is an example formed. Therefore, when the liquid pipe 100 is connected to another liquid pipe 101, the protruding portion 310 of the liquid pipe 100 fits into the concave groove 320 of the liquid pipe 101. Therefore, the first conducting wire 210 and the second conducting wire 220 of the liquid pipes 100 and 101 connected to each other are connected continuously. At this time, the O-ring 350 is inserted into the O-ring groove 119 formed at the first end 120 of the liquid pipe 100 to seal the connection between the two liquid pipes 100 and 101.

3B shows that some of the exposed portions of the first conducting wire 210 and the second conducting wire 220 at the first end 120 of the liquid pipe 100 are protruding portions 310 and some are concave grooves 320. example of forming A concave groove 320 and a protrusion 310 respectively corresponding to the protrusion 310 and the concave groove 320 of the first end 120 are formed in the second end 130 of the liquid pipe 100 . Therefore, when the liquid pipe 100 is connected to another liquid pipe 101, the concave groove 320 and the protruding portion of the liquid pipe 100 are formed on the protrusion 310 and the concave groove 320 of the liquid pipe 101, respectively. By fitting 310, the first conducting wire 210 and the second conducting wire 220 of the two liquid pipes 100 and 101 are electrically connected.

Alternatively, a separate connection member 400 connecting the two liquid tubes may be used, which is illustrated in FIG. 3C. Concave grooves 320 are formed in both the first end 120 and the second end 130 of the liquid tubes 100 and 101, and the connecting member 400 has the concave groove 320 of the liquid tubes 100 and 101. ) It is possible to form a protrusion 410 that can be fitted. Alternatively, protrusions may be formed on the first end 120 and the second end 130 and concave grooves may be formed on corresponding end surfaces of the connection member 400 to connect them.

FIG. 4 is a diagram illustrating a fixing device 600 for fixing the liquid pipes 100 and 101 connected as in FIGS. 3A-3C. A fixing device that connects the two liquid pipes 100 and 101 to fix the liquid pipes 100 and 101 on both sides in a state where the first conducting wire 210 and the second conducting wire 220 on both sides are electrically connected to each other ( 600) to fix it. The fixing device 600 preferably consists of a cylindrical cover 610 formed of metal or plastic and a belt-type fixing part 620. After covering the connecting parts of the liquid tubes 100 and 101 with a cylindrical cover 610, fixing the cover 610 using a belt-type fixing part 620, and then a ratchet buckle formed on the belt-type fixing part 620. By fastening 630, the cover 610 can be bound. In the case of using the connecting member 400 as shown in FIG. 3C, the belt-type fixing part 620 may be used and fixed to both the liquid pipes 100 and 101 and the connecting member 400, respectively.

Next, a method for detecting leakage in a piping system using the liquid pipe 100 according to the first embodiment of the present invention will be described with reference to FIGS. 5A to 5C. A plurality of liquid pipes 100 may be used and connected in the longitudinal direction by a desired distance to transport the liquid.

In order to detect leakage, the first lead 210 and the second lead 220 of the liquid pipe are connected to the controller 900 at the first end 121, and the two first leads 131 are connected to the control unit 900. (210) are electrically connected to each other. 6 illustrates an end cap 490 used to electrically connect the two first conductors 210 at the second end 131 . The end cap 490 is in the form of being inserted into the cylindrical body 110, and the connecting wire 219 to which the two first conducting wires 210 are connected is buried, so that the first conducting wire 210 is connected to the second end 131. ) are electrically connected.

The control unit 900 includes a sensing circuit using a Murray loop as shown in FIG. 5B. That is, the control unit 900 includes a bridge circuit in which the resistor r1 and the variable resistor R are connected to each of the first conductors 210 and the galvanometer G is connected between the two first conductors 210. The resistor r1 and the variable resistor R are connected to the anode of the DC power source E, and the two second conductors 220 are connected to the cathode. The two first conducting wires 210 are electrically connected at the second end 131 by a connecting conducting wire 219 .

When there is no leakage in the liquid pipe, the galvanometer (G) is in equilibrium. The equilibrium state is broken due to the change in resistance, and it is detected that leakage has occurred.

On the other hand, when the total installation distance of the liquid pipe 100 is L, when a short circuit between the first conductor 210 and the second conductor 220 occurs due to liquid leakage at a predetermined position, the galvanometer G maintains an equilibrium state. If it deviates, the variable resistance R of the controller 900 is changed to find a state in which the value of the galvanometer (G) is in equilibrium, and in the equilibrium state, the distance x from the first end 121 to the point where the leakage occurs is is calculated by equation (1) of

x = 2r1/(r1+R) * L (One)

For example, when the total installation length L = 100m and r1 = 1 kΩ, when liquid leakage occurs at a predetermined position and the galvanometer (G) is out of equilibrium, the galvanometer is automatically controlled by the computer connected to the control unit 900. When (G) assumes that the variable resistance value returned to the equilibrium state is 50 kΩ, the distance x to the point where the leakage occurs is 3.9 m.

Accordingly, when the liquid pipe of the present invention is damaged or leakage occurs at the connection portion, the controller 900 can detect the leakage and the distance x to the point where the leakage occurs.

In addition, as shown in FIG. 5C, the two first conducting wires 210 and the two second conducting wires 220 are evenly distributed on the circular cross section, so that even in the case of local damage, it is possible to detect it. there is. Even for the local damage in the four cases ①, ②, ③, ④ shown in FIG. 5C, the galvanometer G is in an equilibrium state corresponding to the four cases ①, ②, ③, ④ shown in FIG. 5B. will get out of Therefore, the control unit 900 can not only detect the leaked liquid, but also accurately detect the distance to the leaked point.

Next, a liquid pipe for detecting leakage according to a second embodiment of the present invention will be described with reference to FIGS. 7A and 7B.

The liquid tube for detecting leakage according to the second embodiment of the present invention is similar to the first embodiment, but in order to facilitate connection of two or more liquid tubes, the first end 120 of the cylindrical body 110 and the second This is an example of forming the male thread 113 on the outer surface of the end 130 side. At this time, a protrusion 310 is formed by protruding the exposed portion of the first conducting wire 210 and the second conducting wire (not shown) at the first end 120 of the liquid pipe 100 in a cross section of a predetermined shape, The second end 130 does not form a protrusion or recess.

A separate connecting device 500 is used to connect the liquid pipe having the male thread 113, and the connecting device 500 has a cylindrical shape with a short length and an inner diameter slightly larger than the outer diameter of the liquid pipe 100. And, a female thread 503 corresponding to the male thread 113 is formed on the inner surface.

The connection device 500 and the two liquid tubes 100 and 101 are screwed together, so that the two liquid tubes 100 and 101 are connected. When connecting the liquid tubes 100 and 101, one or more O-rings 350 may be inserted to seal the connection area.

In addition, when the two liquid pipes 100 and 101 are connected by screwing to the connecting device 500, the protruding part 310 of the first conducting wire 210 and the protruding part of the second conducting wire of the liquid pipe 100 are connected to the liquid pipe 100. The second end 130 of 101 is electrically connected by contacting the exposed portions of the first conducting wire 210 and the second conducting wire.

On the other hand, when the connecting device 500 and the two liquid pipes 100 and 101 are screwed together, the position of the wire to be electrically connected between the two liquid pipes 100 and 101 is slightly out of position according to the fastening clearance. can In this case, in order to secure the electrical connection between the respective conductors, as shown in FIG. 7B, the second end 130 of the liquid pipe 100 has a spare conductor at the exposed portion of each of the conductors 210 and 220 ( 211 and 221) may be formed to a predetermined length along the circumferential direction.

8A to 8B are diagrams illustrating a liquid tube for detecting leakage according to a third embodiment of the present invention.

The liquid tube for detecting leakage according to the third embodiment of the present invention is similar to the second embodiment, but the protrusion 310 is also formed on the second end 130, and the first conductor and the There is a difference in forming the second conducting wire by burying it.

That is, in the liquid pipe 100, male threads 113 are formed on the outer surfaces of the first end 120 and the second end 130 of the cylindrical body 110, and the first end 120 of the liquid pipe 100 A protrusion 310 is formed by protruding the exposed portion of the first conducting wire 210 and the second conducting wire (not shown) at the end 120 and the second end 130 in a cross section having a predetermined shape.

In order to connect the liquid pipe, the connection device 510 has a short cylindrical shape, and the cylindrical portion 512 protrudes inward so that the middle portion of the cylinder approximately matches the inner diameter of the liquid pipe 100, and the cylindrical portion 512 ) Both sides have an inner diameter slightly larger than the outer diameter of the liquid pipe 100, and a female thread 513 is formed on the inner surface thereof. Preferably, an O-ring groove 519 for sealing is formed in the cylindrical portion 512. Similar to the liquid pipe 100, the first conducting wire 210 and the second conducting wire 220 are embedded in the cylindrical portion 512.

The connection device 510 and the two liquid tubes 100 and 101 are screwed together so that the two liquid tubes 100 and 101 can be connected. When the connecting device 510 and the two liquid pipes 100 and 101 are screwed together, in order to solve the problem that the position of the wire may slightly deviate depending on the fastening clearance, as shown in FIG. 8B, the connecting device 510 In the exposed portion of each of the conducting wires 210 and 220 of ), the redundant conducting wires 211 and 221 may be formed to a predetermined length along the circumferential direction.

Therefore, when the two liquid pipes 100 and 101 are connected by screwing to the connecting device 510, the first conducting wire 210 and the second conducting wire of the two liquid pipes 100 and 101 are connected to the connecting device 510. By coming into contact with the first conducting wire 210 and the second conducting wire, respectively, they are electrically connected.

On the other hand, although not shown, the connection device 500 or the connection device 510 is formed in a straight line shape, a "L" shape, a "T" shape, etc. as shown in FIG. 7a or 8a, so that various terrain or underground The liquid pipe can be connected according to buried objects.

Next, referring to FIG. 9 , a liquid tube for detecting leakage according to a fourth embodiment of the present invention will be described.

The liquid tube for leak detection according to the embodiment of FIG. 9 uses the connection device 500 similarly to the second embodiment, but the pogo pin 330 is provided as a protrusion at the first end 120 of the liquid tube 100. And to form a concave groove 320 in the second end (130).

At the first end 120 of the liquid pipe 100, a mounting groove 335 exposing the first conducting wire and the second conducting wire is formed so that the pogo pin 330 can be mounted, and the pogo pin 330 is formed in the mounting groove 335. The pin 330 is fixed by the fixing part 334 . The pogo pin 330 includes a cylindrical body portion 331 having a closed front end and an open rear end to form a space inwardly, and a rear pin 332 coupled to the inside of the rear end of the body portion 331 and having an open front end. And, the body portion 331 includes a spring 333 accommodated in the inner space. The cylindrical body 331, the rear pin 332 and the spring 333 are all made of conductors.

The connection device 500 and the two liquid tubes 100 and 101 are screwed together, so that the two liquid tubes 100 and 101 are connected. At this time, in the final rotation of the screw connection, the pogo pin 330 is inserted into the concave groove 320 by the elasticity of the spring 333, adjusting the clearance of the screw connection. Therefore, the first conducting wire and the second conducting wire may be electrically connected between the two liquid pipes 100 and 101 to be connected.

The pogo pin 330 can be used in place of the protrusion 310 in the embodiments described herein, and when the pogo pin 330 is used, electrical connection between the first and second conductors can be stably formed. can

10 to 12 are perspective views illustrating a liquid tube for detecting leakage according to another embodiment of the present invention.

The liquid pipe 100 for detecting leakage shown in FIG. 10 has a shape in which a plurality of first conducting wires 210 and a plurality of second conducting wires 220 are alternately buried. At this time, the distance between the first conducting wire and the second conducting wire is constant.

The liquid tube 100 for leak detection shown in FIG. 11 has a form in which two first conducting wires 210 and one second conducting wire 220 form a set 290, and a plurality of sets 290 are buried. . At this time, the distance between each of the first conducting wires 210 and the second conducting wires 220 within one set is constant.

The liquid pipe 100 for detecting leakage shown in FIG. 12 has a shape in which two first conducting wires 210 and one second conducting wire 220 are spirally embedded. At this time, the distance between each of the first conducting wires and the second conducting wires is constant.

In order to connect the liquid pipe 100 of FIGS. 10 to 12 to each other, a protrusion 310 and a concave groove 320 may be formed at the first end and the second end, and the protrusion 310 and the concave groove 320 ) formation and connection of the liquid tube can be formed similarly to those in FIGS. can be done similarly to

13 is a view explaining the use of a liquid pipe inserted into an existing pipe according to embodiments of the present invention. When the pipe in use is corroded or scale is deposited and the pipe needs to be replaced, the liquid pipe according to the embodiment of the present invention can be inserted into the existing pipe and used.

Although the above has been described with reference to specific embodiments of the present invention, those skilled in the art can make various modifications to the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. It will be understood that it can be modified and changed accordingly.

100, 101: liquid pipe
110: cylindrical body
111: inner surface 112: outer surface
119: O-ring home
120: first end 130: second end
210: first conductor 220: second conductor
300: coupling part
310: protrusion 320: concave groove
350: O-ring
400: connection member 600: fixing device
500, 510: connection device
900: control unit

Claims (17)

As a liquid tube for detecting leakage,
a cylindrical body including an inner surface and an outer surface, having a predetermined thickness between the inner surface and the outer surface, extending in a longitudinal direction, and having a first end and a second end in the longitudinal direction;
a plurality of first conducting wires buried between the inner surface and the outer surface in a straight or spiral shape in the longitudinal direction and exposed at the first end and the second end;
at least one second conductor wire buried between the inner surface and the outer surface in parallel with the plurality of first conductor wires and exposed to the first and second ends;
Coupling part formed on at least one of the first end and the second end of the cylindrical body
A liquid tube for leak detection comprising a. According to claim 1,
The coupling part is a protruding part or a concave groove formed to expose the first conducting wire or the second conducting wire. According to claim 2,
When two or more liquid pipes for leak detection are connected,
The first conductor and the second conductor are respectively connected by a concave groove formed to correspond to the protrusion of the coupler or a connection member having a protrusion formed to correspond to the concave groove of the coupler and in which the first conductor and the second conductor are buried, respectively. Liquid tube for detection. According to claim 1,
the coupling part
a protrusion formed at the first end to expose a first or second conducting wire; and
A concave groove formed at the second end so that the first or second conducting wire is exposed and corresponds to the protrusion.
A liquid tube for leak detection comprising a. According to claim 1,
The coupling part is a protrusion,
the protrusion
A cylindrical body portion in which a front end is closed and a rear end is open to form a space inwardly;
A rear pin coupled to the inside of the rear end of the body and having an open front end; and
Spring accommodated in the inner space of the body
A liquid tube for leak detection comprising a. According to claim 1,
the coupling part
A redundant wire portion in which exposed portions of the first and second conductive wires are formed at a predetermined length in the circumferential direction at the first end or the second end.
A liquid tube for leak detection comprising a. According to claim 1,
A liquid tube for detecting leakage in which threads are formed on outer surfaces of the first end and the second end of the cylindrical body. According to claim 7,
When two or more of the liquid tubes for detecting leaks are connected, the liquid tubes for detecting leaks are connected by a connection device in which threads corresponding to the threads of the cylindrical body are formed on the inside. According to claim 8,
The connection device has a cylindrical portion protruding inward to match the diameter of the inner surface of the leak detection liquid tube,
A plurality of first conducting wires and at least one second conducting wire are embedded in the cylindrical part, and the plurality of first conducting wires and at least one second conducting wire are exposed on both sides of the cylindrical part. According to claim 1,
When two or more liquid tubes for leak detection are connected, the liquid tubes for leak detection are fixed by a fixing device.
The fixing device is
A cylindrical cover covering the connection area; and
Belt-type fixing part capable of fixing the cover and the liquid pipe
A liquid tube for leak detection comprising a. According to claim 1,
The first conducting wire and the second conducting wire are each two liquid tubes for leak detection. According to claim 1,
The liquid pipe for detecting leakage, characterized in that the resistance of the first conducting wire and the resistance per unit length of the second conducting wire are uniform. According to claim 12
The liquid pipe for detecting leakage, characterized in that the resistance of the first conducting wire is smaller than the resistance of the second conducting wire. According to claim 12
The first wire is made of a copper nickel alloy,
The liquid tube for detecting leakage, characterized in that the second conductor is formed by mixing at least one of silver, CNT, and graphene. As a piping system capable of detecting leakage,
Connecting a plurality of liquid pipes for leak detection according to any one of claims 1 to 15,
The plurality of first conducting wires and the at least one second conducting wire are alternately arranged at equal intervals,
At one end side of the plurality of leak detection liquid tubes, the plurality of first conductors and the at least one second conductor are connected to a control unit for supplying DC power and detecting leaks;
The plurality of first conductors are electrically connected to each other at the other end side of the plurality of liquid leak detection liquid pipes connected to each other. According to claim 15,
The control unit
a galvanometer connected between the plurality of first conducting wires;
a DC power supply connected between both ends of the galvanometer and the at least one second conductor; and
a variable resistor connected between the DC power supply and one end of the galvanometer;
including,
When the measured value of the galvanometer is out of equilibrium, detecting whether or not there is leakage in a plurality of connected liquid pipes for detecting leakage, and calculating a distance to a leakage point by changing the variable resistance. According to claim 15,
An end cap in which a connection wire electrically connecting the plurality of first wires to each other is buried
A piping system further comprising

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