KR20160043780A - Apparatus for detecting leakage, method for producing the same, binding device for the same and leakage detecting system using the same - Google Patents

Abstract

The present invention relates to a water leakage sensing device which senses water leakage by detecting the resistance change between two conductors arranged on a tape, a manufacturing method thereof, a coupling device for the same, and a water leakage sensing system using the same. The water leakage sensing device comprises: a base sheet; a buried layer which is spread on the base sheet in a uniform thickness; and a pair of water leakage sensing wires which are realized as wires coated with a nonconductive material, are buried in the buried layer, and are arranged at a uniform interval, wherein the water leakage sensing wires coated with the nonconductive material has a height higher than or equal to the thickness of the buried layer and exposes the wires thereof to the outside by forming holes in the sheath of the wires exposed to the top of the buried layer at uniform intervals in a state that the water leakage sensing wires are buried.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a leak detection device, a manufacturing method thereof, a fastening device suitable for the leakage detection device, and a leakage detection system using the leakage detection device.

More particularly, the present invention relates to a leakage detection device for detecting a leakage by detecting a change in resistance between two conductors arranged on a sheet, a manufacturing method thereof, a fastening device suitable for the leakage detection device, and a leakage detection system using the same .

Currently, all countries in the world are faced with serious problems due to the leakage of junctions between phases, sewage pipes and agricultural water pipes, industrial water pipes, oil pipelines and district heating pipes (hereinafter referred to as "fluid pipelines") buried underground, The difficulty of procurement is seeking a fundamental solution.

Leaving sewage pipes and oil leaks (oil) pollutes soil, ground water and rivers and causes green tides. Leaving water, sewer pipes and agricultural water leaks may lead to serious safety accidents such as sink holes, and cause huge economic losses.

Therefore, it is important to develop real-time sensing devices and related systems because it is necessary to detect leakage of joints of the fluid transfer pipe early in the generation and to prevent cost and safety accidents.

In the past, there was no monitoring system, but there are many ways to effectively manage underground facilities with the rapidly developing ICT technology.

Fluid transfer pipelines are the foundations of infrastructure in modern life, including underground facilities such as gas, oil, water, sewage, steam, heating, agricultural water, and industrial water.

Techniques for detecting the leakage of the fluid transfer pipe include a monitoring system equipped with a CCTV, a hydraulic pressure meter, an integrated water quality sensor, etc., which can be applied between the inspection port and the inspection port of the pipe without cutting or disassembling the pipe, There are limitations in detecting accurate leak points and real-time leak detections, and in particular, it is impossible to detect and monitor a wide area in real time.

On the other hand, recently developed real-time breakage / leak detection system, the detection line is installed on the outer surface of the fluid transfer pipe, and the leak detection device composed of the detection sensor and the protective cover is installed in the joint, , It can be applied only to pressure pipes of 900 mm or less and it is not applicable to non-pressure pipes such as general sewer pipes.

The reason why the above system is not applied to a large pressure tube of 1,000 mm or more is due to a large development cost of the protective cover mold and difficulty in production, storage, transportation and construction due to the enlargement of the parts.

A remote monitoring device that plays an important role in detecting breakage or leaking position is an automatic distance measuring device, which is built in the remote monitoring device, connects to a detection tape attached to the outside of the fluid transfer pipe and to a detection line built into the leak detection device And transmits the radio wave to the sensing line. When the radio wave travels along the sensing line, if the sensing line is short-circuited or disconnected, the radio wave is again generated and returned to the measuring instrument. The measuring instrument that receives this echo wave computes the time taken from transmission to reception and multiplies the transmission speed of the wire to calculate the sensing wire length to the fault.

Distance (breakage leak position) = transmission speed of conductor x xe wave arrival time

Based on the GIS-based location layer, based on the layer map of the actual area, DB to the data acquired during construction is checked and then a new layer is added to create a leak detection pipe layer to find the breakage and leakage position.

Recently, when a fluid pipe for conveying fluid of 900 mm or less is buried, a pressure sensor is attached to the joint to detect the leakage of the joint, and a protective cover is fastened to the pressure sensor to withstand a certain pressure.

Fig. 1 shows an example of a conventional leak detection device.

Referring to Fig. 1, there is shown the installation of the leak detection device 10 in the joint of the pipe 20. Fig. The water leakage sensing device (10) incorporates a water leakage sensor formed of a pressure sensor inside the protective cover.

The leakage detection device shown in FIG. 1 has been developed to check the leakage of a joint in real time, but it is not applicable to all pipes.

In addition, the water leakage sensing device 10 shown in FIG. 1 requires a precision installation because the water leakage sensor is attached to the inside of the protective cover and the water tightness is maintained until the pressure sensor is activated in case of leakage.

However, the conventional leak detection device 10 can be applied only to a fluid pipe for fluid transportation of 900 mm or less, and a large pipe can not be commercialized due to an excessive mold development cost, production cost, distribution cost and construction cost increase.

Therefore, it has not been possible to establish a system for detecting leakages of joints for non-pressure pipes such as pressure pipes and sewage pipes for fluid transportation of 1,000 mm or more.

Especially, large diameter protective cover such as 3,000 mm tube has a large mold development cost and bulky, which makes logistics, storage and construction difficult.

Other leak detection technologies include a technique for detecting leaks by sound waves or vibrations, but there is a problem in that accurate leakage positions can not be confirmed.

Disclosure of the Invention The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a pressure vessel joint capable of detecting all kinds of fluid-pressure joint pipe leakage of 3,000 mm (excluding a pipe using a mechanical joint)

It is also an object of the present invention to provide a leak detection device capable of detecting a leak in a joint of all non-pressure pipes (circular sewer pipe, box-type sewer pipe) having a diameter of 3,000 mm or less.

It is another object of the present invention to provide a method of manufacturing the leak detection device.

It is still another object of the present invention to provide a fastening device which can be used in combination with the above-described leak detection device to detect breakage / leakage of a pipe by cutting off a sensing line by leakage when sudden leakage occurs in a joint.

It is still another object of the present invention to provide a leakage monitoring system having the leakage detection device.

According to an aspect of the present invention,

A leakage detection device for detecting leakage of water by being installed at a joint part of a pipe,

Base sheet,

A buried layer coated on the base sheet to a predetermined thickness;

And a pair of leak sensing wires which are embodied by a conductor coated with a non-conductive material and which are embedded in the embedding layer and are looped at regular intervals in the loop,

In this case, the leakage sensing line may be formed to have a height equal to or higher than the thickness of the buried layer in a covered state, and to form a hole at a predetermined interval in a covering exposed to the upper portion of the buried layer.

Here, it is preferable that the leakage sensing wires are wrapped in a zigzag shape in the longitudinal direction of the base sheet.

Here, it is characterized by further comprising a water-soluble conductive medium embedded between the pair of water-sensing lines.

Here, it is preferable to further include a water-permeable protective sheet for protecting the buried layer and the water-sensing line.

The water leakage detection device is connected to the pipe at both sides of the water leakage detection device installed in the joint part so that external water is prevented from flowing into the pipe and the detection line is broken when sudden water leakage occurs, It is preferable that a fastening band for fastening is further provided.

Here, the embedding layer is preferably embodied as an adhesive.

According to another aspect of the present invention,

Preparing a leak detection wire having a base sheet, a filler, and a coated lead;

A hole forming process of forming a hole at a predetermined interval on the covering of the water leakage sensing line to expose the conductive line;

Applying the embedding agent on the base sheet at a height equal to or thinner than a height of the leakage sensing line in a covered state;

A landfill process in which the pair of leakage sensing lines are piled up at a predetermined interval on the upper side of the applied embedding material and are pressed to fill the leakage sensing line into the applied filling material;

And a control unit.

Here, in the embedding process, it is preferable that the leakage sensing line is wrapped in a zigzag shape in the longitudinal direction of the base sheet.

Here, the peeling process is characterized in peeling the coating with a laser.

Here, the water-soluble conductive medium is further embedded between the water-sensing lines in the embedding process.

According to another aspect of the present invention,

A fastening device for fastening the leak detection device to a pipe after connecting a leak detection wire of a leak detection device installed in a pipe joint part and a connection line for connecting the leak detection devices,

A fastening band made of a material resistant to corrosion and for fastening the leak detection device to the pipe; And

And a cutting device coupled to the fastening band,

Here, a cutting blade is formed on one side of the fastening device, and when the leak detection device is swollen by leakage, the cutting blade cuts the leak detection line of the leak detection device.

Here, the fastening band is a steel band.

According to another aspect of the present invention,

In a leak detection system,

A plurality of leak detection devices installed at joints of the pipe;

A connection line for connecting the leak detection devices; And

A remote monitoring device for transmitting a radio wave to the connection line, receiving the echo wave, and calculating the length to the leak detection device in which leakage and disconnection have occurred;

/ RTI >

Here, the leakage detection device

Base sheet,

A pressure-sensitive adhesive layer coated on the base sheet to a predetermined thickness;

And a pair of leak detection wires embodied by a conductor coated with a non-conductive material, embedded in the adhesive layer,

Here, the leak-sensing wire may have a height equal to or higher than the thickness of the adhesive layer in a covered state, and a hole may be formed at a predetermined interval in a covering exposed to the upper portion of the adhesive layer in a state of being embedded, do.

The present invention is capable of real-time sensing of leaks in fluid-pressure joints (except for pipes connected by mechanical joints), and particularly applicable to sewer pipes that are abandoning leak detection due to insufficient hydraulic pressure. Can be effectively prevented.

The present invention eliminates the need for the development of a mold for a protective cover and makes it possible to greatly reduce the manufacturing cost by making a sensing device that also functions as a sensing sensor and a protective cover and has an effect of facilitating handling, transportation, and construction. It is expected to be competitive.

Fig. 1 shows an example of a conventional leak detection device.
Fig. 2 shows an embodiment of the leak detection device according to the present invention.
Fig. 3 shows another embodiment of the leak detection device according to the present invention.
Fig. 4 shows an example of the installation of the leakage detection device according to the present invention.
Fig. 5 shows in detail what is shown in Fig.
FIG. 6 shows an example of a leakage detection system to which the leakage detection sheet according to the present invention is applied.
Fig. 7 shows an operation procedure of the leakage detection system shown in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a leakage detection device capable of directly detecting a leakage of a joint, and in particular, provides a technology capable of drastically reducing the cost of handling, storing, and transporting and the field construction cost.

In order for the leak detector to detect leaks directly, a pair of coated or coated leak detection wires should be wired at regular intervals and stripped at appropriate intervals using a laser.

When the coated cloth is peeled off, there is a problem that the monitoring distance is shortened due to attenuation when it is too wide. Especially. When a sensing device (sheet) is attached to a cast iron pipe, the pipe itself may be a conductor, which may cause a short circuit.

It also provides a band (sense line-shaped wing formation) that prompts the manager when a sudden leak occurs and disconnects the sensing line to prevent accidents.

Fig. 2 shows an embodiment of the leak detection device according to the present invention.

Referring to FIG. 2, the water leakage sensing apparatus 100 according to the present invention is implemented in a sheet form and is composed of a plurality of layers.

The leakage sensing device 100 according to the present invention includes a base layer 102, a pressure-sensitive adhesive layer 104, and a water-sensing line 106. Here, the adhesive layer 104 corresponds to the embedding layer in the summary of the present invention.

The base layer 102 forms the outer skin of the leak detection device 100 and supports the pressure-sensitive adhesive layer 104. The pressure-sensitive adhesive layer 104 is made of butyl or the like, and the water-sensing wire 106 is embedded and supported.

The pressure sensitive adhesive layer 104 made of butyl is self-tacky with an unglazed composition. It is made by extrusion molding of sticky compound made from butyl rubber and has good adhesion to almost all materials. Especially, unlike silicon, it does not require drying time and can be easily installed without special tools.

The leak detection wire 106 has holes formed at a predetermined interval on its outer surface so that water can penetrate through the holes during leakage.

It is preferable that the water leakage sensing line 106 protrude above the pressure sensitive adhesive layer 104 for efficient water leakage detection and the pressure sensitive adhesive layer 104 is provided between the water leakage sensing lines 106 even if it protrudes, 106 are not likely to be shorted to each other.

There is no possibility of condensation due to the fact that the pipe provided with the water leakage sensing device 100 is buried in the ground. Even if condensation occurs, the pair of water leakage sensing lines 106 are separated by the pressure- It does not.

Even if the water leakage sensing apparatus 100 is damaged during construction, since the pressure sensitive adhesive layer 104 has separated the water leakage sensing lines 106, openings may be generated before leakage occurs and the water leakage sensing apparatus 100 is damaged none.

The pair of leak detection lines 106 are arranged in a zigzag form at regular intervals.

Although it is possible to arrange the pair of leak detection lines 106 in a straight line so as to surround the seams, it is difficult to accurately construct the leak detection lines 106 in accordance with the seams and it is also difficult to check the leaks.

Therefore, it is preferable to provide the water leakage sensing line 106 in a zigzag manner so that the operator can confirm the water leakage even if the precision construction is not performed.

Fig. 3 shows another embodiment of the leak detection device according to the present invention.

3 additionally embeds the conductive medium 202 between the two leak detection lines 106 so as to easily cause a short circuit between the leak detection lines 106 when a leak occurs.

As an example of the conductive medium 202, a rope made of a cotton or the like which can easily absorb a sodium chloride solution, which is a water-soluble conductive material, is put into a sodium chloride solution and then dried or wrapped with a thin paper. The sodium chloride composition ratio is better as the sodium content is higher.

Here, a padding line (not shown) may be used as the conductive medium 202 instead of a rope of a fiber impregnated with a water-soluble conductive medium.

Fig. 4 shows an example of the installation of the leakage detection device according to the present invention.

Referring to FIG. 4, the water leakage sensing apparatus 100 is installed in a joint, and the water leakage sensing apparatus is connected by a connection line 402.

After connecting the water leakage sensing line 106 of the water leakage sensing device 100 to the connection line 402 and then fastening the fastening band 404 to both sides of the water leakage sensing device 100, . Here, the fastening band 404 may be a corrosion resistant stainless steel band or a coated steel band. At this time, the cutting device 406, which can cut the water leakage sensing line 106 of the water leakage sensing device 100, is coupled to the fastening band 404.

Fig. 5 shows in detail what is shown in Fig.

When the water leakage detecting device 100 is swollen due to sudden leakage of water, the sharp cutting blade 406a formed on one side of the cutting device 406 coupled to the fastening band 404, The line 106 is cut. When the water leakage sensing line 106 is disconnected, that is, when the water leakage sensing line 106 is disconnected, the remote monitoring device determines the position of the water leakage sensing device 100 in which the disconnection has occurred. This makes it possible to quickly detect a sudden leak.

The cutting device 406 may be integrally formed with the fastening band 404 or may be configured separately. If it is important to consider combinations with commercially available bands in the market, it is preferable to configure them as separate types. The separable cutting device 406 may be fabricated in such a manner that it engages with the fastening band 404.

Reference numeral 500 denotes a pipe.

Fig. 6 shows an example of the fastening band and cutting device shown in Fig. The fastening band 404 and the cutting device 406 constitute the fastening device in the summary of the present invention.

When fastening the fastening band 404 to the side of the leak detection device 100, it is fastened together with the cutting device 406. At one side of the cutting device 406, a sharp cutting blade 406a is formed. The cutting blade 404a and the water leakage sensing line 106 are not in contact with each other when the water leakage detection device 100 is not inflated by the water leakage.

If a large amount of water is supplied to the leak detector 100 due to a sudden leak, the leak detector 100 is swollen. In this state, the cutter blade 404a cuts the leak detection wire 106 do.

7 shows an example of a leakage detection system to which the leakage detection sheet according to the present invention is applied.

7, the water leakage detection system 600 includes a remote monitoring device 602, a water leakage detection device 100, and a connection line 402.

The water leakage sensing device 100 is installed for each pipe joint (about 6 m), and the plurality of water leakage sensing devices 100 are composed of one network. Each of the water leakage sensing devices 100 is connected to each other by a connection line 402 and a remote monitoring device 602 installed on the ground transmits a radio wave to each water leakage sensing device 100 through a connection line 402, It is monitored whether or not there is leakage in the air conditioner 100.

At this time, as the distance from the remote monitoring apparatus 602 increases, the intensity of the radio wave decreases. In addition, when the sheath of the wire is damaged, it is attenuated, and the more the sheath is damaged, the greater the attenuation becomes.

Accordingly, when the coated line is peeled off, the length of the monitoring distance is shortened due to attenuation, and if it is too small, leakage of water can not be detected. It is important to peel off the coating in an optimum state by using a laser capable of precisely controlling the peeling length and shape because there is a problem that if the peeling of the coating is too small to avoid attenuation, even if leakage occurs.

On the other hand, when the leak detection device 100 of the present invention is attached to a cast iron pipe, the pipe itself may be a conductor, which may cause a short circuit. Accordingly, a waterproof protective sheet (not shown) is attached to the upper portion of the water leakage sensing line so that the portion where the hole of the water leakage sensing line 106 is directly brought into contact with the cast iron pipe.

The water leakage detection device 100 may be connected in series by the connection line 402 as shown in FIG.

One remote sensing device 602 can monitor about 4 to 10 km, and the leakage position information can be confirmed by the length of the sensing line up to the joint portion constructed at the time of construction.

One of the reasons why the leak detection device 100 is zigzagged when fabricating the leak detection device 100 is to accurately grasp leak position information.

Fig. 8 shows the operation procedure of the leakage detection system shown in Fig.

Referring to FIG. 8, when breakage and leakage occur, the remote monitoring apparatus 602 detects this.

The remote monitoring device 602 is connected to the sensing line and transmits a radio wave to the sensing line to monitor the pipe network. If a breakage or leakage occurs, the remote monitoring device 602 displays the position of the water leakage sensing device 100 on the monitor and generates an alarm Or notifies the main server

The difference between the leakage detection system according to the present invention and the existing system shown in FIG. 7 is as follows.

division The system of the present invention Existing system Leak detection method Direct leak detection Pressure sensor Material cost (ratio) 50 100 Construction cost (ratio) 50 100 Transportation cost, storage cost (ratio) 20 100 Coverage Pressure tube / non-pressure tube 900mm or less pressure tube Applicable pipe diameter (mm) 3,000 or less 900 or less

The leakage detection system according to the present invention as shown in FIG. 7 can reduce the production cost of the leak detection device by 50%, reduce the construction cost by 50%, and reduce the logistics cost by 80% as compared with the existing system, Can be prevented.

In addition, when a sudden leak occurs, the manager can be informed promptly to avoid a large accident. In addition, it is possible to prevent a sinkhole from occurring by real-time restoration when water or sewage leaks occur.

100 ... leak detector
102 ... base sheet 104 ... pressure-sensitive adhesive layer
106 ... leak detection wire 302 ... conductive medium
402 ... connection line 404 ... fastening band
406 ... cutting device 406a ... cutting blade
600 ... leak detection system 602 ... remote monitoring device

Claims (18)

A leakage detection device for detecting leakage of water by being installed at a joint part of a pipe,
Base sheet,
A buried layer coated on the base sheet to a predetermined thickness;
And a pair of leak sensing wires embodied in a conductor coated with a non-conductive material and embedded in the embedding layer and arranged at regular intervals from each other,
Here, the leakage sensing line may be formed such that the height of the leakage sensing line is equal to or higher than the thickness of the burying layer, and holes are formed at regular intervals in the covering exposed to the top of the burying layer in a state of being buried, Leak detection device.
The leak detection device according to claim 1, wherein the leakage sensing line is wrapped in a zigzag shape in the longitudinal direction of the base sheet.
The leak detection device according to claim 1, further comprising a conductive medium embedded between the pair of leak detection lines.
The leakage sensing device according to claim 3, wherein the conductive medium is a fiber impregnated with sodium chloride as a water-soluble conductive material.
4. The leakage sensing device according to claim 3, wherein the conductive medium is a twisted wire
The leak detection device according to claim 3, further comprising a water-permeable protection sheet for protecting the water-sensing line.
The method according to claim 1,
Further comprising a fastening band for fastening the water leakage detection device to the pipe at both sides of the water leakage detection device installed at the joint part of the pipe.
8. The leak detection device according to claim 7, further comprising a cutting device coupled to the fastening band to cut the leakage sensing wire of the leakage sensing device when a sudden leakage occurs.
The leak detection device according to claim 8, wherein the cutting device is coupled by the fastening band and has a cutting blade for cutting the water-sensing wire at one side.
The leak detection device according to claim 1, wherein the buried layer is formed of an adhesive.
A method for manufacturing a leak detection device,
Preparing a leak detection wire having a base sheet, a filler, and a coated lead;
A hole forming process of forming a hole at a predetermined interval on the covering of the water leakage sensing line to expose the conductive line;
Applying the embedding agent on the base sheet at a height equal to or thinner than a height of the leakage sensing line in a covered state; And
A landfill process in which the pair of leakage sensing lines are piled up at a predetermined interval on the upper side of the applied embedding material and are compressed to fill the leakage sensing line into the applied filling material;
Wherein the leakage detection device comprises:
12. The method of claim 11, wherein the water leakage sensing line is folded in a zigzag shape in a longitudinal direction of the base sheet during the embedding process.
12. The method according to claim 11, wherein the hole forming process comprises forming a hole in the coating with a laser.
12. The method according to claim 11, further comprising embedding a conductive medium between the leak sensing lines in the embedding process.
12. The method according to claim 11, wherein the embedding agent is an adhesive.
A fastening device for fastening the leak detection device to a pipe after connecting a leak detection wire of a leak detection device installed at a joint part of a pipe and a connection line for connecting the leak detection devices,
A fastening band made of a material resistant to corrosion and for fastening the leak detection device to the pipe; And
And a cutting device coupled to the fastening band,
Wherein a cutting blade is formed on one side of the cutting device, and when the water leakage detecting device is inflated by water leakage, the cutting blade cuts the water leakage detection line of the water leakage detection device.
17. The fastening device according to claim 16, wherein the fastening band is a steel band.
In a leak detection system,
A plurality of leak detection devices installed at joints of the pipe;
A connection line for connecting the leak detection devices; And
A remote monitoring device for transmitting a radio wave to the connection line, receiving the echo wave, and calculating the length to the leak detection device in which leakage and disconnection have occurred;
/ RTI >
Here, the leakage detection device
Base sheet,
A pressure-sensitive adhesive layer coated on the base sheet to a predetermined thickness;
And a pair of water sensing lines embodied in a conductive wire coated with a nonconductive material and embedded in the adhesive layer and arranged at regular intervals,
Here, the leak-sensing wire may have a height equal to or higher than the thickness of the adhesive layer in a covered state, and holes may be formed at regular intervals in a covering exposed to the upper portion of the adhesive layer in a state of being embedded, Leak detection system

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