KR100933063B1 - Leakage checking pipe - Google Patents

Abstract

PURPOSE: A leakage detection pipe is provided to sense water leakage using a water leakage sensor in case of cutting a pipe, damage to a conducting wire, or cracks. CONSTITUTION: A leakage detection pipe(1') comprises a pipe body(10'), a water leakage sensor(20'), a water absorber(30'), and a protective layer(40'). The water leakage sensor is formed at the outer circumference of the pipe body at constant intervals. The water absorber contacts the water leakage sensors. The protective layer is laminated on the water leakage sensor and the water absorber. The pipe body comprises a metallic pipe and a synthetic resin pipe. An insulating layer(13) and a coating layer(35) are successively laminated between the outer circumference and the protective layer of the pipe body. The water leakage sensor and the water absorber are formed between the coating layer and the protective layer. The water leakage sensor is spirally reeled according to the longitudinal direction of the outer circumference of the pipe body.

Description

Leak Detector {LEAKAGE CHECKING PIPE}

The present invention relates to a leak detection tube, and more particularly, to a leak detection tube capable of detecting leaks quickly and accurately by improving a leak detection structure.

In general, pipes for transporting fluids such as water pipes, sewage pipes, oil pipes, and gas transfer pipes are made of steel pipes or synthetic resin pipes, and are manufactured by multi-layer coating pipes coated with a protective layer on the outer circumferential surface of the pipes according to the purpose and installation environment. use.

If a leak occurs in such a tube, serious problems may occur depending on the type of fluid. For example, when a leak occurs in a situation where a pipe is used as a water supply pipe, problems such as waste of tap water and contamination of tap water due to bacterial infiltration occur. In addition, when the pipe body is used as a sewage pipe, waste water transfer pipe, or the like, leakage occurs during the transfer of the fluid, causing serious pollution to the surrounding environment. In addition, in the case of a flammable fluid transfer pipe such as a gas transfer pipe or an oil pipe, leakage occurs, causing a risk of explosion and a loss of life and property.

Therefore, the necessity of accurately identifying leaks early is very important.

However, since the ordinary fluid transport tube is constructed in the form of being buried underground, when the leakage of the tube occurs, the situation is not immediately understood. However, since the leak is detected at the time when the trace of the leak appears on the ground, a late repair work is performed only after the breakage of the pipe and the ground pollution have been progressed for a long time. In addition, even if the traces of leaks appear on the ground, it was not a case of accurate leak location.

As a result, a huge amount of fluid loss is caused, and since the ground is dug up to determine the leak location, there is a problem in that the cost of repair work for the repair or replacement of the tube is excessively consumed.

Recently, as shown in FIG. 1, a leak detection tube 101 for detecting a leak of a fluid has been developed. In general, the leak detection tube 101 is spirally wound so that the conducting wire 120 has a predetermined pitch on the outer circumferential surface of the tubular body 110, and is transmitted from the conducting wire 120 to one end region of the tubular body 110. According to the detection signal has a structure that is provided with a leak signal transmission means 140 for determining the presence or absence of the leak and transmits to the manager. At this time, the conductive wire 120 may be protected from the outside by a resin protective layer (not shown).

On the other hand, the transport path of the fluid is a plurality of tubular 110 is connected to each other, the connection portion 130 is provided on the connection portion of the tubular 110 so that the conducting wires 120 of the adjacent tubular 110 is electrically connected. have. In addition, the connection portion 130 for electrically connecting the conductive wire 120 and the leak signal transmitting means 140 is also provided at the end of the last tube 110 of the fluid transfer path.

In the conventional leak detection tube 101, when a leak of fluid occurs in one region of the tubular body 110 and contacts the conductive wire 120, the conductive wire 120 is short-circuited by a short circuit at the portion thereof. Then, the reflection pulse is transmitted to the leak signal transmitting means 140 in the short portion of the conductive wire 120, whereby the leak state and the leak position are confirmed.

However, in such a conventional leak detection tube, since the conducting wire is wound on the outer circumferential surface of the tubular body at a predetermined pitch interval, fluid leakage occurs in the tubular body in a region corresponding to the pitch interval, and the leaked fluid comes into contact with the conducting wire. There was a problem that can not detect the leak state until. Specifically, leaks are detected when the tubular body is cut, and when breakage or cracking occurs between the conductors, there is a problem that it is difficult to detect leaks.

Accordingly, it is an object of the present invention to provide a leak detection tube that can detect leaks quickly and accurately even when breakage or cracking occurs between conductors, as well as between conductors.

In order to achieve the above object, the present invention, in the water leak detection tube, the water leaking detection unit provided with a spaced interval on the outer circumferential surface of the pipe body, and at least the water gap contacting the leak detection unit provided in the spaced intervals Provided is a leak detection tube including an absorber, and the leak detection unit and a protective layer laminated on the water absorber.

Here, the leak detection unit is preferably wound in a spiral along the longitudinal direction of the outer peripheral surface of the tube.

Alternatively, the leak detection unit may be arranged at least one or more parallel to the longitudinal direction of the tube. At this time, at least one leak detection unit is arranged in parallel with the longitudinal direction of the tube, it is effective to be a plurality of leak detection unit electrically connected to each other in parallel circumferential direction to the outer peripheral surface of the tube.

In this case, the leak detection unit is preferably a band-shaped thin film, it is more preferable that one surface of the thin film includes an adhesive surface bonded to the outer peripheral surface of the tube.

In addition, it is more effective that the water absorber is any one of a fiber, paper, and nonwoven fabric. At this time, it is more effective that the water absorber is a porous body.

On the other hand, the tube is a metal tube or a synthetic resin tube, the insulating layer and the coating layer is sequentially laminated between the outer peripheral surface and the protective layer of the tube, the leak detection unit and the water absorber is preferably provided between the insulating layer and the coating layer. Do.

In addition, the tube is a metal tube or a synthetic resin tube, the insulating layer and the coating layer is sequentially laminated between the outer peripheral surface and the protective layer of the tube, the leak detection unit and the water absorber is preferably provided between the coating layer and the protective layer. Do.

According to the present invention, there is provided a leak detector tube that can detect leaks quickly and accurately.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

2 is a cross-sectional view of the leak detection tube according to the first embodiment of the present invention. As shown in this figure, the leak detection tube 1 according to the present embodiment is a tubular body 10 forming a fluid transfer path, and the leak detector 20 for detecting the leakage of fluid in the outer peripheral surface of the tubular body 10 ), A water absorber 30 for moving the fluid leaked from one region of the pipe body 10 spaced apart from the leak detector 20 to the leak detector 20, a leak detector 20, and a water absorber ( A protective layer 40 for protecting 30.

The pipe body 10 connects a plurality of pipe bodies 10 for use such as water pipes, sewage pipes, oil pipes, and gas pipes to form a transfer path of the corresponding fluid. In this case, the tube body 10 may be provided with a synthetic resin tube such as a high-density PE (polyethylene) tube or PVC (polyvinyl chloride) tube, or a metal tube such as a steel tube. In the present embodiment, the tubular body 10 will be described as a synthetic resin tube.

The leak detection unit 20 is wound spirally on the outer circumferential surface of the tubular body 10 using a conductive coil wire while maintaining a spaced interval of a predetermined pitch along the longitudinal direction. Since the leak detection unit 20 is provided with a synthetic resin tube 10, the leak detection unit 20 may be wound to directly contact the outer peripheral surface of the tubular body 10 without forming a separate insulating layer on the outer peripheral surface of the tubular body 10. In addition, a connection part for electrically connecting the leak detection units 20 of the pipes 10 which are adjacently connected to the longitudinal end region of the leak detection unit 20 or with a leak signal transmission means (not shown). (Not shown) is provided.

Here, the leak detection unit 20 is another example in addition to the structure wound around the outer peripheral surface of the tubular body 10 in a spiral, as shown in Figure 6, at least one or more parallel to the longitudinal direction of the tubular body 10, The circumferentially spaced parallel may be a structure electrically connected to each other.

In addition, although the leak detection unit 20 is another example, as shown in Figure 6, it may be a band-shaped thin film 50. In this case, the thin film 50 may have a leak detection line such as a conductive wire or a conductive material. The leak detection unit 20 may be provided by spirally winding the thin film 50 on the outer circumferential surface of the tube body 10. Alternatively, the leak detection unit 20, the thin film 50 at least one or more parallel to the longitudinal direction of the tubular body 10, for example, a plurality of the tubular body 10 in parallel in accordance with the diameter of the tubular body 10 Attached to the outer circumferential surface of the), it may be provided on the outer circumferential surface of the tubular body 10 in the form of attaching the thin film films 50 to be spaced in parallel in the circumferential direction and electrically connected to each other. At this time, the thin film 50 may use an acrylic resin or a silicone resin film 50, and one surface of the thin film 50 is formed with an adhesive surface (adhesive layer) coated with an adhesive material for attachment to the tubular body 10. Can be used.

On the other hand, the water absorber 30 is to absorb the moisture quickly to move the leaked fluid to the adjacent leak leak detection unit 20, at least the leak detection unit 20 in the spaced apart interval of the leak detection unit 20 Are arranged to contact the terminals.

At this time, the material of the water absorber 30 is included in the present invention as long as it has absorbency, for example, it is preferably provided with a nonwoven fabric, paper, fibers, and the like. In addition, the moisture absorber 30 may be a porous body. Specifically, the water absorber 30 may be formed by forming perforations in sheets such as nonwoven fabric, paper, and fibers, or may have a mesh structure, for example, a textile fabric. At this time, the porous body can quickly absorb moisture to increase the transfer speed, and also the resin material of the protective layer 40 is embedded in the pores, for example, the bonding force, for example, the bonding layer of the protective layer 40 and the tubular body 10. Can be increased.

Although the shape of the water absorber 30 is not illustrated, the water absorber 30 may be provided in a band shape having a wider width than the spaced interval between the leak detectors 20, and a sheet having an area corresponding to the circumferential surface of the pipe body 10. It may be provided in the form.

Here, the moisture absorber 30 may be disposed above or below the leak detector 20, and a coating layer may be formed on the leak detector 20 and the moisture absorber 30 with an insulating material.

The protective layer 40 is formed on the leak detector 20 and the water absorber 30 to prevent the leak detector 20 from being damaged by an external impact. The protective layer 40 may be formed by coating and curing a resin solution, for example, and may be formed by coating a resin sheet.

On the other hand, Figure 3 is a cross-sectional view of the leak detection tube according to a second embodiment of the present invention. As shown in this figure, the leak detection tube 1 'according to the present embodiment is a metal tube 10' forming a fluid transfer path and an insulating layer laminated on the outer peripheral surface of the tube 10 '( 13) and the leaked fluid in one region of the conductive leak detector 20 'which detects a leak of fluid on the insulating layer 13, and the tubular body 10' spaced apart from the leak detector 20 '. The water absorber 30 'which moves to the sensing unit 20', the coating layer 35 stacked on the leak detector 20 'and the water absorber 30', and the protection stacked on the coating layer 35. Layer 40 '.

The leak detection tube 1 'according to the present embodiment is a tube 10' uses a metal tube (for example, a steel tube), and the rest of the configuration except for the tube 10 ', the insulating layer 13, and the coating layer 35 Same as the first embodiment described above. Accordingly, hereinafter, only the tubular body 10 'and the insulating layer 13 will be described, and the rest of the configuration will be omitted.

The tubular body 10 'is provided with metal pipes, such as a steel pipe, a cast iron pipe, and a high strength alloy steel pipe. Metal tubes are highly desirable for forming a transport path for high pressure fluid in terms of strength and durability.

On the other hand, the insulating layer 13 is to prevent a short circuit between the metal tube 10 'and the conductive leak detection unit 20' is made of a metal material, and the resin material such as epoxy is laminated on the outer peripheral surface of the tube body 10 'and cured. To form.

In addition, the coating layer 35 is to prevent the external exposure of the leak detection unit 20 ', and a resin material such as PE is laminated on the leak detection unit 20' and the water absorber 30 'and then cured. Form. At this time, after laminating the adhesive layer 15 formed of the adhesive material on the insulating layer 13, the leakage detecting unit 20 ', the water absorber 30' and the coating layer 35 are sequentially laminated on the adhesive layer 15. can do. In this case, the adhesive layer 15 may be made of soft modified PE having a low melting point.

Here, the leak detection unit 20 'and the water absorber 30' can be changed up and down as in the first embodiment. In addition, the leak detection unit 20 ′ and the moisture absorber 30 ′ may be disposed between the coating layer 35 and the protective layer 40 ′ as shown in FIG. 4.

The protective layer 40 'is a laminate cured resin material on the coating layer 35, and prevents damage of the coating layer 35 and the leak detection unit 20' due to external impact or the like.

In addition, as shown in Figures 3 and 4 showing an embodiment of the present invention, when the insulating layer 13 is formed, the tube 10 'is a metal tube is useful, in this case also the tube 10' May be composed of a synthetic resin tube. For example, the tubular body 10 'is composed of a synthetic resin tube, but the outer peripheral surface of the tubular body 10' is for reinforcing strength, for example, it is preferable that an insulating layer 13 is formed to wind a metal wire or the like. .

On the other hand, Figure 4 shows a preferred embodiment of the present invention. Referring to FIG. 4, in the leak detector 1 ′ according to the present invention, a water absorber 30 ′ is formed on the leak detector 20 ′, and a protective layer 40 is formed on the water absorber 30 ′. ') Is formed, the tubular body 10' is composed of a metal tube (eg, a steel tube), and the adhesive layer composed of an insulating layer 13 composed of epoxy, etc., soft PE, etc. on the tubular body 10 'in turn ( 15) and a structure in which the coating layer 35 composed of PE and the like is formed. In addition, the leak detection unit 20 ′ is preferably provided between the coating layer 35 and the protective layer 40 ′. When the leak detection tube 1 'of the structure is connected to each other, only the protective layer 40' is peeled off so that the leak detection unit 20 'of the adjacent pipe 1' can be easily connected, thereby simplifying the work. In addition, the leak detection unit 20 ′ may have a structure in which a conductive leak detection line is embedded in the thin film 50 (see FIG. 5).

In the leak detection tube (1,1 ') according to the present invention having the configuration and embodiments as described above, the fluid leaks in one region of the tubular body (10, 10') corresponding to the separation interval of the leak detection unit 20 ' When the water absorber 30 and 30 'is rapidly absorbed, the wetted range of the water absorber 30 and 30' is spread (fluid transfer) so that the water contacts the leak detection unit 20 and 20 '. do.

Then, the leak detection unit 20, 20 'of the part in contact with the water is short-circuited by a short circuit, and this signal is transmitted to a leak signal transmission means (not shown) to confirm the leak state and the leak position. Therefore, compared to the prior art, even if the leak detection pipe (1, 1 ') is cut, as well as the breakage or cracking occurs in any part, that is, the yarn between the leak detection unit (20, 20') is leaked quickly You can check for leaks.

In this case, the leak signal transmitting means (not shown) may transmit the leak state and the leak position using a wireless or wired communication means (not shown) from the manager, and the manager monitors a fluid transfer path or a personal portable communication terminal. The leak state and the leak position of the fluid transfer path transmitted from the leak signal transmission means (not shown) can be quickly and accurately confirmed.

As a result, the manager can quickly and accurately repair the leakage of the fluid transfer line, thereby preventing fluid loss and unnecessary waste of maintenance costs.

1 is a perspective view of a conventional leak detection tube,

2 is a cross-sectional view of the leak detection tube according to the first embodiment of the present invention;

3 is a cross-sectional view of the leak detection tube according to a second embodiment of the present invention;

4 to 6 are cross-sectional views of the leak detection tube according to another example of the present invention.

* Explanation of symbols for the main parts of the drawings

10, 10 ': tube 13: insulation layer

20, 20 ': leak detection unit 15: adhesive layer

30, 30 ': water absorber 35: coating layer

40, 40 ': protective layer 50: thin film

Claims (8)

In the leak detection pipe, Tube body; Leak detection unit provided at an interval apart from the outer peripheral surface of the tube; A water absorber provided at least in the spaced intervals and in contact with the leak detectors; It includes a protective layer laminated on the leak detector and the water absorber, The tube is a metal tube or a synthetic resin tube, An insulating layer and a coating layer are sequentially stacked between the outer circumferential surface of the tube and the protective layer, and the leak detection unit and the water absorber are provided between the coating layer and the protective layer. The method of claim 1, The leak detection unit is a leak detection pipe, characterized in that spirally wound along the longitudinal direction of the outer peripheral surface of the tube. The method of claim 1, Leak detection unit, Leak detection tube, characterized in that at least one or more arranged in parallel in the longitudinal direction of the tube. The method according to any one of claims 1 to 3, The leak detection unit is a band-shaped thin film, the leak detection tube, characterized in that one surface of the thin film includes an adhesive surface bonded to the coating layer. The method of claim 1, The water absorber is a leak detection tube, characterized in that any one of fibers, paper, nonwoven fabric. The method of claim 5, The water absorber is a leak detection tube, characterized in that the porous body. In the leak detection pipe, Tube body; Leak detection unit provided at an interval apart from the outer peripheral surface of the tube; A water absorber provided at least in the spaced intervals and in contact with the leak detectors; It includes a protective layer laminated on the leak detector and the water absorber, The tube is a metal tube or a synthetic resin tube, An insulating layer and a coating layer are sequentially stacked between the outer circumferential surface of the tube and the protective layer, and the leak detection unit and the water absorber are provided between the insulating layer and the coating layer. delete

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