KR20110020199A - Pipe, leak/cut-off sensing apparatus and its manufacturing method - Google Patents

Abstract

PURPOSE: A device for detecting fluid leakage and disconnection of a pipe, a manufacturing method thereof, and a pipe using the same are provided to detect the cutting of pipes, since a pipe is cut by external force or internal force. CONSTITUTION: A device(200) for detecting fluid leakage and disconnection of a pipe is mounted on one or more among an outer wall of an inner pipe, an inner wall of an outer pipe, and a space between the inner pipe and the outer pipe. The device for detecting fluid leakage and disconnection of a pipe comprises a base layer(210) and two or more conductive lines. The base layer is formed of heat insulating material. The conductive lines are formed on the surface of the base layer in a longitudinal direction.

Description

Leakage fluid and pipe cut detection device and its manufacturing method and piping using the same {Pipe, leak / cut-off sensing apparatus and its manufacturing method}

The present invention relates to a leaking fluid and a pipe cut detection device for detecting a cut of a pipe, as well as a pipe installed with the same, as well as detecting a fluid leaking to the outside by being mounted on a pipe through which a fluid such as a water pipe flows.

Pipes or electric power pipes for supplying fluids to remote locations such as steam pipes, water pipes, and gas pipes are installed in the ground or exposed to the ground, extending from a few hundred meters to several tens of kilometers in length.

These pipes are cracked due to corrosion, impact from the outside, shrinkage and expansion according to temperature, so that steam, water, etc. flowing in the inside may leak to the outside.

In case of leakage of steam or water, the ground weakens and causes collapse, and in case of water pipes, water pollution occurs, so leakage accidents should be strictly managed.

However, when such a fluid leakage occurs, it is very difficult to identify the exact position of the pipe embedded in the basement, so there is only a method of digging and confirming the position where leakage is expected.

In this case, it is necessary to dig up a section of hundreds of meters to several kilometers, so the construction time for the restoration is very long, and also a lot of costs in terms of cost.

Even when exposed to the ground, the supervisor must check the leakage location with the naked eye, so it also takes a lot of time, so there is a problem that it is difficult to immediately recover.

An object of the present invention has been proposed in order to improve the problems in the prior art as described above, by installing a tape and leak detection device in the pipe form to grasp the exact leakage position and cutting state, it is convenient to install An object of the present invention is to provide a leaky fluid and pipe cutting detection device, a method for manufacturing the same, and a pipe using the same, which enables low-cost recovery of fluid leakage and pipe cutting at a low cost.

According to a preferred embodiment of the present invention for achieving the above object,

In the inner tube is inserted while maintaining a constant interval inside the outer appearance, in the double insulation tube provided with a filler for insulation between the outer tube and the inner tube,

Leak and cut detection device is mounted in the longitudinal direction of the double insulation tube on at least one of the outer wall of the inner tube or the inner wall of the outer tube or the space between the inner tube and the outer tube,

The leak and cut detection device,

A base layer formed of a tape and made of an insulating material;

At least two conductive lines in the longitudinal direction on the surface of the base layer; is formed to be formed.

As described above, according to the present invention, by installing a tape-type leak and cut detection device in the pipe, it is possible to pinpoint the leak and the position of the leak even in long-distance pipe, and also the tape-type leak and cut detection device Since it can be installed in the form of attachment to the pipe has the convenience of installation and can be installed at a relatively low cost.

In addition, since the leak detection device is cut when the pipe is cut by an external force or an internal pressure, the cut of the pipe may be detected.

1 is an external view according to a first embodiment of the present invention.
2 is a cross-sectional view of FIG.
Figure 3 shows the configuration of the leak and cut detection device.
4 is a cross-sectional view according to a second embodiment of the present invention.
5 is an external view according to a third embodiment of the present invention;
6 is a cross-sectional view of FIG.
7 is an external view according to a third embodiment of the present invention;
8 is a cross-sectional view of FIG.
9 shows a fourth embodiment of the present invention;
10 and 11 show another form of the leak and cut detection device of the present invention.
12 shows an example of installation of a leak and cut detection device;
Figure 13 illustrates another form of leak and cut detection device of the present invention.
14 is a circuit block diagram of a controller.

Hereinafter, a pipe having a leaking fluid and a pipe cut detection device according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 is a view showing a first embodiment of the present invention, showing a structure of a double heat insulating tube 100 for insulating a fluid having cold or heat, steel pipe, stainless steel pipe, copper pipe, PE, An inner tube 120 made of a material such as PVC is inserted into the outer tube 110, and the inner tube 120 and the outer tube 110 are installed while maintaining an equal interval.

The exterior 110 is a tube for protecting the inner tube 120 when buried underground or exposed to the outside, and may be formed as a high-density polyethylene tube, aluminum or steel tube, or a synthetic resin material such as PE or PVC.

In addition, the space between the exterior 110 and the inner tube 120 is filled with a heat insulating material 120, such as hardened polyurethane (Rigid Polyurethane) to heat the fluid flowing inside the inner tube (120).

At this time, before the insulating material 130 is filled, a tape-type leakage and cutting detection device 200 for detecting leakage along the longitudinal direction is installed on the inner wall surface of the exterior 110. Such leakage and cutting detection device 200 is provided. The outer wall surface of the inner tube 120 or the outer surface 110 and the inner tube 120 may be installed between the space, that is, the heat insulating material (130).

The leakage and cut detection device 200 is configured in the form of a tape, as shown in Figure 3, the length of the base layer 210 formed of an insulating PET, PE, PTFE, PVC or other Teflon-based material At least two conductive lines 211 and 212 in the direction are formed at equal intervals.

The conductive lines 211 and 212 may be formed of copper, gold, silver, or other conductive metals. Preferably, the conductive lines 211 and 212 may be formed of a conductive ink or a silver compound and printed on the base layer 210.

At this time, the conductive lines 211 and 212 are formed to have a uniform resistance per unit area, and when the conductive lines 211 and 212 are shorted to each other by the leaked water at the time of leakage, the position of the leakage value is accurately read by reading the magnitude of the resistance value. You can see.

To this end, the conductive lines 211 and 211 are operated by being supplied with power by being connected to an external controller using a separate connector.

An adhesive layer 220 is further provided below the base layer 210 to increase the convenience of installation by easily attaching and fixing the inner wall surface of the exterior 110 or the outer wall surface of the inner tube 120.

Referring to the installation process of the leak and cut detection device 200, first, the leakage and cut detection device 200 by the adhesive layer 220 on the inner wall surface of the exterior 110 or the outer wall surface of the inner tube 120. After attaching, the inner tube is inserted into the inside of the exterior 110, and then the installation is completed by filling the heat insulating material 130.

When the fluid leaks from the inner tube 120, the operation process penetrates into the heat insulating material 130, and the conductive lines 211 and 212 of the leakage and cut detection device 200 are shorted to each other by the diffused fluid. A change in resistance occurs at.

The controller detects the change in the resistance value and determines whether or not the leakage occurs and the location of the leakage, and generates an alarm, and the administrator immediately checks it so that the action is performed.

In addition, when the exterior 110 or the inner tube 120 is cut by the external force or the internal pressure, the leakage and the cutting of the cutting detection device 200 are accompanied, so that the disconnection of the signal is sensed so that the pipe 110 or the inner tube ( The cutting state of 120) can be confirmed.

4 is a second embodiment of the present invention, in which a leak and cut detection device 200 is installed in a bar-shaped spacer 330 for maintaining a predetermined distance between an exterior 310 and an inner tube 320. It is seen.

Usually, a plurality of spacers 330 having a predetermined length are provided in a space between the exterior 310 and the inner tube 320, and the plurality of spacers 330 installed in this way are installed in the longitudinal direction of the tube and at a predetermined interval. And the inner tube 320 to maintain the equal intervals.

In this case, an insertion hole 331 is formed in the spacer 330 so that the leakage and cutting detection device 200 penetrates and is inserted into the spacer 330, such as the insertion hole 331, between the exterior 310 and the inner tube 320. Cutting detection device 200 is formed so as to stand up or formed so as to face in the direction of the inner tube 320, such as the insertion hole 332.

When installed in the insertion hole 332, the leakage and cut detection device 200 can be quickly and accurately detect the leakage from the inner tube 320 only when the conductive line (211,212) formed portion is installed toward the inner tube 320, The adhesive layer 220 does not have to be formed.

When the leakage and cut detection device 200 is installed in this way, the filling is completed by filling the insulation 340.

5 and 6 is a third embodiment of the present invention, the leakage and cutting detection device 200 is installed in a spiral form outside the inner tube of the double insulation tube or the outer tube of the double insulation tube to detect the leakage of fluid As the structure, the adhesive layer 410 is formed on the outside of the tube 400, the leakage and cut detection device 200 is attached to the outside in a spiral form, the surface on which the conductive lines (211, 212) is formed is the tube 400 It is preferable to be installed in contact with the outer surface of the).

At this time, when the leakage and cutting detection device 200 is attached to the outside of the tube 400 in the spiral form, the rotation interval (d) should be attached while maintaining the equal interval, which is to accurately check the leakage position of the fluid .

That is, since the length of the leak and cut detection device 200 attached while winding in a spiral form is much longer than the length of the actual tube 400, when the rotation interval d maintains an equal interval, it is calculated by the controller. To accurately determine the leakage position of the tube (400).

At this time, the adhesive layer 220 of the leakage and cut detection device 200 may not be formed.

A coating layer 420 made of PE film is formed on the outside of the leakage and cut detection device 200 to protect the tube 400 and the leakage and cut detection device 200.

In another method, a liquid absorbing layer 411 having an absorbent non-woven fabric, a sponge, or the like is formed on the outside of the adhesive layer 410 formed on the outside of the tubular body 400, and outward of the liquid absorbing layer 411. After the leakage and cut detection device 200 is wound in a spiral form, water leaked from the tubular body 400 is formed on the liquid adsorption layer 411 by forming the coating layer 420 on the outside of the leak and cut detection device 200. It can be quickly absorbed and diffused into a large area so that leaks can be detected quickly and accurately.

In addition, since the leakage and cutting of the cutting detection device 200 are involved when the pipe 400 is cut, the cutting state of the pipe 400 may be confirmed by detecting a break in the signal.

7 and 8 are a fourth embodiment of the present invention, the leakage and cut detection device 200 in the longitudinal direction is attached to the outer side of the tube 500, wherein the conductive line (211, 212) is formed on the surface of the tube 500 It is preferable to be installed in contact with the outer surface of the).

In addition, a coating layer 510 made of PE is formed on the outside to completely surround the leakage and cut detection device 200 in order to protect the leakage and cut detection device 200 from moisture introduced from the outside. The coating layer 510 may be formed to surround the tube 500 as a whole or may be configured to surround the upper and side portions with the coating layer 510 to protect only the leakage and cutting detection device 200 from the outside.

In this case as well, as in the third embodiment of the present invention, by wrapping a liquid flaw layer made of a nonwoven fabric, a sponge, or the like on the outer side of the tube 500, the leakage and cutting detection device 200 may be attached to detect leaks quickly and accurately. .

9 is a view showing a state in which a leakage and cutting detection device 200 is inserted into an intermediate layer between an inner side and an outer side of a PE body 700 as a fifth embodiment of the present invention. The wire mesh layer 720 is formed to increase the strength against pressure and external force to the outside of the first layer 710, and the second layer 730 is formed of PE material on the outside thereof.

The leakage and cutting detection device 200 is attached to the outside of the second layer 730 in a spiral form or in a straight form, and a third layer 740 made of PE material is formed outside the second layer 730 to form an intermediate layer of the tubular body 700. It shows a state in which the leak and cut detection device 200 is formed.

FIG. 10 is a cross-sectional view of a width direction showing another form of the leakage and cut detection device 200 applied in the present invention. The leak and cut detection device 200 shown in FIG. 3 is a portion except for a portion where conductive lines 211 and 212 are formed. Since the film is formed of a film material, when the conductive lines 211 and 212 of the leakage and cut detection device 200 are installed to face the outer surface of the tube coated with the film material, the film material is in contact with the slip occurs because the spiral form It is difficult to maintain the same interval when winding the furnace, and also when installing side by side in the longitudinal direction of the pipe is not easy to install in a straight form.

Accordingly, as shown in FIG. 10, in the state where the conductive lines 211 and 212 are formed side by side on the upper surface of the base layer 210, the upper adhesive layer 230 made of hot melt or the like is formed on a portion where the conductive lines 211 and 212 are not formed. Form.

Since the upper adhesive layer 230 is easily attached by thermocompression bonding between the outer side of the tube and the tube and the coated protective film, it is leaked in the form of tape when spirally wound on the outer side of the tube or installed in a straight line in the longitudinal direction. And the cutting detection device 200 can be easily fixed by the upper adhesive layer 230.

Therefore, the leakage and cut detection device 200 is installed in a spiral form or a straight line on the outside of the pipe, and then the outer layer is wound with a PE film to form a coating layer to detect leakage fluid as well as pipe cutting. .

In addition, the conductive lines 211 and 212 are not printed on the upper surface of the base layer 210, and copper wires are placed side by side at the positions thereof, and then an upper adhesive layer 230 made of hot melt or the like is formed on a portion where the copper wires are not placed. In this case, the copper wire should be exposed to the outside without being covered with the upper adhesive layer 230.

The upper adhesive layer 230 attaches the leakage and cut detection device 200 to the outside of the tube, and serves to fix the copper conductor to the base layer 210.

Figure 11 is a cross-sectional view of the width direction showing another embodiment of the leakage and cut detection device 200 applied in the present invention, the copper wires (241, 242) are installed side by side at a lower portion of the base layer 210, hot melt The lower adhesive layer 250 is formed and fixed.

At this time, some of the copper wires 241 and 242 may or may not be exposed to the outside of the lower adhesive layer 250, and the conductive lines 211 and 212 and the upper adhesive layer 230 formed on the base layer 210 may be simultaneously exposed. It may or may not be formed.

That is, the pair of copper wires 241 and 242 and the lower adhesive layer 250 are independently formed on the base layer 210, or the conductive lines 211 and 212 and the upper adhesive layer 230 are simultaneously formed on the base layer 210. It can be formed.

Therefore, it is easy to install by attaching to the outside of the tube by the lower adhesive layer 250, if the upper adhesive layer 230 and the lower adhesive layer 250 is formed at the same time between the outer side of the tube and the coating layer of the film material When the coating layer is formed on the outside of the tube by the leakage and cutting detection device 200 is inserted to increase the adhesive performance so that the coating layer does not slip on the outside of the tube to be stably wound and does not need to apply an adhesive layer on the outside of the tube. The process will be reduced.

That is, when the leakage and cut detection device 200 of the present invention is inserted between the outer side of the tube and the coating layer, and then thermally press-bonded, the lower adhesive layer 250 made of hot melt or the like melts and adheres to the coating layer to have adhesive strength. In addition, leakage and cutting can be detected.

The reason why the copper wires 241 and 242 are formed on the base layer 210 is that the leakage can be sensed even without the conductive lines 211 and 212 formed. Can be detected.

In other words, when the tube is cut, the copper wires 241 and 242 are also cut to generate a signal break so that the controller can detect this and check whether the tube is broken.

FIG. 12 is a view illustrating an example in which the leak and cut detection device 200 illustrated in FIG. 10 is installed outside the tube 600, and the surface of the base layer 210 on which the conductive lines 211 and 212 are formed is the tube 600. It is installed so as to face the fixed by the upper adhesive layer 230, the coating layer 610 is formed on the upper structure is shown.

That is, the leak and cut detection device 200 is inserted between the outer side of the tube 600 and the coating layer 610 and then fixed by thermocompression.

In addition, as shown in FIG. 11, the copper conductors 241 and 242 may not be integrally formed on the base layer 210, but may be separately installed on the side of the leakage and cut detection device 200 and fixed by the coating layer 610. .

Figure 13 is a cross-sectional view of the width direction showing another form of the leakage and cut detection device 200 applied in the present invention, the lower adhesive layer 250, such as hot melt is applied to the lower portion of the base layer 210 In the upper portion, a pair of conductive lines 211 and 212 by the printing method are formed in the longitudinal direction, and an upper adhesive layer 230 coated with hot melt or the like is formed on a portion where the conductive lines 211 and 212 are not formed.

In addition, a pair of thin copper wires 243 and 244 in the form of a thin plate is placed side by side in the longitudinal direction of the base layer 210 to the side portions of the pair of conductive lines 211 and 212, wherein the copper wires 243 and 244 are It is placed on the upper surface of the upper adhesive layer 230, such as hot melt.

That is, the copper conductors 243 and 244 are located on the upper surface of the upper adhesive layer 230 coated with hot melt, and the copper conductors 243 and 244 are temporarily fixed to the upper adhesive layer 230 made of hot melt by a slight pressing force. do.

12 and then inserted between the outer side of the tube 600 and the coating layer 610 as shown in FIG. 12, and then the thermocompression is performed, the upper adhesive layer 230 and the lower adhesive layer 250 is melted to leak and cut detection device 200 ) Is fixedly attached between the tube 600 and the coating layer 610, and at the same time the lower surface of the copper conductors (243, 244) is firmly attached to the upper adhesive layer (230).

The upper surface of the base layer 210, that is, the surface on which the conductive lines 211 and 212 and the copper conductive lines 243 and 244 are formed, is installed toward the tube 600.

Therefore, the leak is detected by the conductive lines 211 and 212 and the copper conductors 243 and 244, and the cutting of the tube 600 may be detected by the copper conductors 243 and 244.

Referring to the manufacturing method of the leakage and cut detection device 200 applied in the present invention, the upper surface of the base layer 210 of the long tape form of a material of insulating PET, PE, PTFE, PVC or other Teflon series The conductive lines 211 and 212 in the form of strips are formed at least two lines at equal intervals with conductive ink on the bottom surface, and are formed by applying an upper adhesive layer 230 such as hot melt to the lower and upper surfaces of the base layer 210. .

Subsequently, a pair of copper conductors 243 and 244 in a thin plate form are attached to the upper surface of the base layer 210 on which the upper adhesive layer 230 is formed to complete the manufacturing.

That is, the copper conductors 243 and 244 are attached to the upper surface of the upper adhesive layer 230.

FIG. 14 shows a circuit block of a controller 600 for detecting leakage and breakage of a tube using the leak and cut detection device 200 described above, wherein the controller 710 is connected to conductive lines 211 and 212 and copper. Pulsed sensing signals are output to and received from the conducting wires 241 and 242 (243 and 244), and the ends of the copper conducting wires 241 and 242 (243 and 244) are connected to each other. The detected signal will normally be input to the controller 710.

When leakage occurs, the conductive lines 211 and 212 are shorted or the resistance values of the copper conductors 241 and 242 and 243 and 244 are changed. Therefore, leakage can be confirmed through this, and the resistance values or the copper conductors of the conductive lines 211 and 212 are changed. The resistance change values of (241, 242) and (243, 244) are applied to the controller 710 to determine the location of leakage.

That is, since the distance value corresponding to the resistance values of the conductive lines 211 and 212 and the copper conductive lines 241 and 242 (243 and 244) is input to the data storage unit 720, the controller 710 may detect the leakage and cut detection device 200. The resistance value input and the resistance value stored in the data storage unit 720 are compared to read and display a distance value corresponding to the matched resistance value or transmit the readout value to the central control unit through the transmitter 730.

When the cutting of the tube occurs, the leakage of the tape and the cutting detection device 200 are also cut. Therefore, the controller 710 receives the reflection signal of the pulse applied to the copper wires 241 and 242 and 243 and 244 to adjust the cutting position. Figure out.

That is, the difference between the time that the pulse signal is input to the copper conductors 241 and 242 (243 and 244) and the time when the input pulse is reflected from the cut portion and is returned, is calculated and the distance information corresponding to the time is calculated. It is read from the display or transmitted to the central control unit of the remote place through the transmitter 730.

At this time, the data storage unit 720 also stores the distance information according to the reflection time of the pulse.

As a result, such a tape-shaped leak and cut detection device 200 can be easily installed by attaching to the tube, as well as to accurately detect leaks and cuts from the pipe.

110,310: Inner tube 120,320: Exterior
130: insulation
200: leak and cut detection device
210: base layer 211,212: conductive line
220: adhesive layer
230: upper adhesive layer
241,242,243,244: copper conductor
250: lower adhesive layer
330: spacer 331,332: insertion hole
600: tube 610: coating layer
710: first layer 720: wire mesh layer
730: second layer 740: third layer

Claims (14)

In the inner tube is inserted while maintaining a constant interval inside the outer appearance, in the double insulation tube provided with a filler for insulation between the outer tube and the inner tube,
Leak and cut detection device is mounted in the longitudinal direction of the double insulation tube on at least one of the outer wall of the inner tube or the inner wall of the outer tube or the space between the inner tube and the outer tube,
The leak and cut detection device,
A base layer composed of an insulating material;
And at least two lines of conductive lines formed in a longitudinal direction on a surface of the base layer.
In the inner tube is inserted into the inner tube while maintaining a constant interval by a plurality of spacers, between the outer tube and the inner tube is provided with a heat insulating material in the double insulation tube,
The spacer is formed with a penetrating insertion hole, the insertion hole is inserted into the leakage and cut detection device is mounted in the longitudinal direction of the double insulation tube,
The leak and cut detection device,
A base layer composed of an insulating material;
And at least two lines of conductive lines formed in a longitudinal direction on a surface of the base layer.
Leak and cut detection device is installed in a spiral form to the outside of the fluid flowing pipe or in a straight line on the outer side of the pipe, and to protect the leak and cut detection device from the outside environment from the outside. A coating layer is formed,
The leak and cut detection device,
A base layer composed of an insulating material;
And at least two lines of conductive lines formed in a longitudinal direction on a surface of the base layer.
4. The pipe having leakage fluid and a pipe cut detection device according to claim 3, further comprising an absorbent liquid adsorption layer between the outside of the pipe and the leak and cut detection device.
The pipe having a leakage fluid and a pipe cut detection device according to claim 3, wherein an adhesive layer is formed on a surface of the base layer on which the conductive line is formed.
The pipe having a leaking fluid and a pipe cut detection device according to claim 3, wherein a pair of copper conductors are arranged side by side on the surface of the base layer, and the copper conductors are fixed by the adhesive layer.
The pipe having a leakage fluid and a pipe cut detection device according to claim 3, wherein a pair of copper conductors are arranged on the surface of the base layer in parallel with the conductive lines, and the copper conductors are fixed by the adhesive layer.
A base layer composed of an insulating material;
At least two conductive lines formed in a longitudinal direction on a surface of the base layer;
An upper adhesive layer applied to an upper surface of the base layer on which the conductive line is formed;
Leakage fluid and pipe cutting detection device, characterized in that consisting of; a pair of copper conductors attached to the upper surface of the upper adhesive layer side by side with the conductive line.
The leakage fluid and pipe break detection device according to claim 8, wherein a lower adhesive layer is formed on a lower surface of the base layer.
10. The leakage fluid and pipe break detection apparatus according to claim 8 or 9, wherein the upper adhesive layer or the lower adhesive layer is formed of hot melt.
Forming at least two lines of conductive lines in the form of strips with conductive ink on the upper surface of the long tape-shaped base layer of insulating material at equal intervals;
Forming an upper adhesive layer on an upper surface of the base layer on which the conductive line is formed;
And attaching a pair of copper conductors to the upper surface of the upper adhesive layer in parallel with the conductive lines.
A wire mesh layer is formed outside the first tube through which the fluid flows, and a second tube is formed outside the wire mesh layer, and a leakage and cut detection device is installed on the outer surface of the second tube. On the outside, a coating layer is formed to protect the leakage and cutting detection device from the outside environment,
The leak and cut detection device,
A base layer composed of an insulating material;
And at least two lines of conductive lines formed in a longitudinal direction on a surface of the base layer.
The pipe having a leaking fluid and a pipe cut detection device according to claim 12, wherein a pair of copper conductors are arranged side by side on the surface of the base layer, and the copper conductors are fixed by the adhesive layer.
The pipe having a leakage fluid and a pipe cut detection device according to claim 12, wherein a pair of copper conductors are arranged on the surface of the base layer in parallel with the conductive lines, and the copper conductors are fixed by the adhesive layer.

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