KR20140037571A

KR20140037571A - Pipe for sensing water leakage and method for the pipe and pipe equipment for sensing water leakage

Info

Publication number: KR20140037571A
Application number: KR1020120103889A
Authority: KR
Inventors: 진경수; 우현섭
Original assignee: 현대하이스코 주식회사
Priority date: 2012-09-19
Filing date: 2012-09-19
Publication date: 2014-03-27
Also published as: KR101428190B1

Abstract

The present invention relates to an outer tube having a predetermined length having a hollow shape; An inner tube inserted into the hollow of the outer tube and having a predetermined length through which the fluid flows; And between the outer tube and the inner tube. And a leakage detection unit for detecting a change in a pressure value when the fluid leaks to the outside of the internal pipe in the internal pipe to determine whether or not the leakage occurs. The present invention also provides a pipe arrangement having the pipe and a method of manufacturing the pipe.

Description

TECHNICAL FIELD [0001] The present invention relates to a pipe for leakage detection, a method for manufacturing the pipe, a pipe for leakage detection,

The present invention relates to a leak detection pipe, and more particularly, to a leak detection pipe capable of detecting the occurrence of a leak and confirming the occurrence position of a leak in real time, a method of manufacturing the same, and a pipe installation.

Generally, about 20% of the tap water leaks because the old water pipe is not replaced, which is a waste of cost, and also causes a great contamination of water quality due to the inhaling of foreign substances or bacteria from the leakage position.

Therefore, it is important to precisely grasp the leakage position and repair or replace it. Conventionally, there has been a problem that the leakage position can not be grasped accurately for a small amount of leakage.

On the other hand, it has been actively researched in Korea recently and it is possible to grasp the damage of buried pipeline in real time by using the technology of TDR (Time Domain Reflectometer), which is an electric waveform analysis technology developed to grasp the location of a damaged telephone line or optical cable .

However, in order to operate a system such as TDR, it is necessary to use a tube having a breakage detecting coil inserted therein.

A prior art related to the present invention is Korean Patent Laid-Open No. 10-2003-0093508 (published on Dec. 11, 2003), and the prior art discloses a technique for a liquid pipe which is easy to detect a leak.

This leak detection liquid tube is fixed to the outside of one or more wires or inserted into the inside thereof. Normally, two lines of copper wire are spirally wound around the tube. When breakage occurs in the liquid tube, the wire breaks due to water pressure .

When the lead is disconnected, it is possible to measure the fault position by using the TDR technique or by receiving the reflection pulse from the high-strength by using the conventional pulse signal.

However, the detection of leakage due to the breakage of the liquid pipe as described above detects a state that occurs when the tube itself is broken, and there is a problem that the tube is already broken and the leakage is detected after the leakage progresses.

An object of the present invention is to provide a method and a device for detecting a fluid leaking out of the ground by guiding a fluid flow such as tap water buried in the ground, A pipe for leakage detection, a method of manufacturing the pipe, and a pipe facility for leakage detection.

Another object of the present invention is to provide a leak detection pipe capable of monitoring in real time the leakage occurrence position in the pipe, a method of manufacturing the leak detection pipe, and a pipe facility for leakage detection.

Another object of the present invention is to provide a leak detection pipe and a method of manufacturing the same, which can form and manufacture a pressure measurement film for detecting a change in pressure value due to leakage of water to be mounted on a pipe while maintaining a predetermined initial pressure value, And to provide a sensing pipe facility.

In one aspect, the present invention provides an apparatus comprising: an outer tube of constant length having a hollow shape; An inner tube inserted into the hollow of the outer tube and having a predetermined length through which the fluid flows; And between the outer tube and the inner tube. And a leakage detection unit for detecting a change in a pressure value when the fluid leaks to the outside of the internal pipe in the internal pipe to determine whether or not the leakage occurs.

Preferably, the outer tube is made of carbon steel, and the inner tube is made of stainless steel.

Preferably, the water leakage sensing unit includes a film portion interposed between the outer tube and the inner tube, and a pressure sensor portion provided inside the film portion and sensing a change in a pressure value at a plurality of positions.

The pressure sensor unit includes a circuit pattern formed in a lattice shape in the entire area of the inside of the film portion, a plurality of pressure sensors positioned at the intersections of the circuit patterns and sensing a pressure value, And a control module for determining the occurrence of leakage if the sensed pressure value exceeds the reference pressure value and storing the position of the pressure sensor that forms the reference pressure value or more.

According to another aspect of the present invention, there is provided a leak detector comprising: a pipe formed in a hollow shape to allow a fluid to flow; and a leakage monitoring unit for detecting a change in a pressure value due to leakage of the fluid in real time, Pipe facility.

The pipe includes a hollow outer pipe formed of carbon steel, and an inner pipe formed of stainless steel, inserted into the hollow of the outer pipe, through which the fluid flows.

Preferably, the leakage monitoring unit senses a change in pressure value when the fluid leaks to the outside from the internal pipe.

The leak monitoring part is interposed between the outer pipe and the inner pipe. A leakage detection unit for detecting a change in a pressure value when the fluid leaks to the outside of the internal pipe in the internal pipe to determine whether or not the fluid leaks, and a display unit for displaying the changed position of the pressure value on the outside desirable.

The leak detection unit includes a film part interposed between the outer pipe and the inner pipe, and a pressure sensor part installed inside the film part and sensing a change in pressure value at a plurality of positions.

The pressure sensor unit includes a circuit pattern formed in a lattice shape in the entire area of the inside of the film portion, a plurality of pressure sensors positioned at the intersections of the circuit patterns and sensing a pressure value, A control module for determining the occurrence of leakage if the sensed pressure value exceeds the reference pressure value, storing the position of the pressure sensor forming the reference pressure value or more, and transmitting the position stored in the display unit .

Wherein the control module controls the display unit to display an area formed by connecting the positions of the plurality of pressure sensors forming the reference pressure value or more when the pressure sensors forming the reference pressure value or more form a plurality of adjacent pressure sensors, Lt; / RTI >

In another aspect, the present invention provides a method of manufacturing a carbon steel pipe, comprising the steps of: preparing a hollow outer tube formed of carbon steel; A second step of forming a film-shaped leak detection unit, which senses a change in a pressure value, in a hollow shape and closely disposed on the inner circumference of the outer tube; A third step of disposing a hollow internal pipe formed of stainless steel in the hollow of the leak detection unit; And a fourth sealing member for sealing one end of the outer tube and one end of the inner tube and supplying a predetermined amount of molding fluid to the hollow of the inner tube so as to expand the leakage sensing unit between the outer tube and the inner tube, The present invention also provides a method for manufacturing a leak-sensing pipe.

In the fourth step, it is preferable that the pressure value at a plurality of positions of the leak detection unit is measured, and the molding fluid is supplied so that the measured pressure value falls within a predetermined reference pressure value range.

It is preferable that a rough surface is formed on both sides of the leak detection unit so as to form a certain frictional force with the inner circumference of the outer tube and the outer circumference of the inner tube.

The present invention has the effect of instantaneously detecting the leakage of fluid from the outside by guiding the flow of fluid such as tap water buried in the ground and changing the pressure value due to the leak.

Further, the present invention has the effect of monitoring the leakage occurrence position in the pipe in real time.

In addition, the present invention has the effect of forming and manufacturing a pressure measurement film for detecting a change in pressure value due to leakage of water to be mounted on a pipe while maintaining a predetermined initial pressure value.

1 is a perspective view showing a leak detection pipe of the present invention.
2 is a cross-sectional view showing a leak detection pipe of the present invention.
3 is a view showing a leakage detection unit according to the present invention.
4 is a view showing a pipe system for leakage detection of the present invention.
5 is a view showing an example of detecting a leak in a pipe.
FIG. 6 is a view showing pressure value sensing when leakage occurs at a plurality of positions. FIG.
FIG. 7 is a view showing a leakage area according to FIG. 6. FIG.
8 is a flow chart showing a method of manufacturing a pipe of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a leak detection pipe and piping system according to the present invention will be described with reference to the accompanying drawings.

Here, the leak detection pipe is included in the pipe facility and will be described in the pipe facility.

FIG. 1 is a perspective view showing a leakage detection pipe of the present invention, and FIG. 2 is a sectional view showing a leakage detection pipe of the present invention.

FIG. 3 is a view showing a leakage detection unit according to the present invention, and FIG. 4 is a view showing a pipe installation of the present invention.

Referring to FIGS. 1 and 4, a pipe installation capable of detecting and detecting leakage of water according to the present invention comprises a pipe 100 and a leakage monitoring unit.

The pipe 100 is used for leakage detection.

The leakage detection pipe 100 includes a hollow outer pipe 110, an inner pipe 120, and a leakage detection unit 300.

The outer tube 110 is formed of carbon steel and has a hollow shape with a predetermined inner diameter.

The inner tube 120 is formed to have a diameter smaller than the inner diameter of the outer tube 110, is formed to have a predetermined length, and is made of stainless steel.

The inner tube 120 is disposed to be inserted into the hollow of the outer tube 110.

2, since the diameter of the inner tube 120 is smaller than the inner diameter of the outer tube 110, the inner tube 120 is formed to have a constant diameter between the inner circumference of the outer tube 110 and the outer circumference of the inner tube 120, A gap G is formed.

As shown in FIG. 3, the leakage monitoring unit includes a leakage detection unit 300 and a display unit 400.

As shown in FIG. 2, the water leakage sensing unit 300 is inserted into the gap G and positioned. Therefore, it is preferable that the leak detection unit 300 is formed in a cylindrical shape.

The leakage sensing unit 300 senses leakage of the fluid flowing inside the inner tube 120 when the fluid leaks to the outside of the inner tube 120.

Preferably, the leakage sensing unit 300 senses a pressure value that is changed when the leakage occurs to the outside of the inner pipe 120 to determine whether or not the leakage occurs.

The configuration of the leak detection unit 300 will be described.

Referring to FIGS. 2 and 3, the water leakage sensing unit 300 includes a hollow portion 310 and a pressure sensor portion 320.

Here, the film part 310 is formed in a plate-like shape having a predetermined thickness enough to be inserted into the gap G between the outer tube 110 and the inner tube 120, and is formed of a flexible material. Preferably, The film portion 310 may be formed of a dielectric material.

The pressure sensor unit 320 includes a circuit pattern 321, a plurality of pressure sensors 320, and a control module 330.

The circuit pattern 321 is arranged to be embedded in the film portion 310. The circuit pattern 321 may be formed to have a lattice-like structure within the region of the film portion 310 as shown in FIG. The circuit pattern 321 serves to transmit an electrical signal.

Therefore, a plurality of intersection points are formed in the circuit pattern 321 on the lattice.

Here, the plurality of pressure sensors 322 may be disposed at the intersections.

Of course, the pressure sensors 322 may be provided on the circuit pattern 321 in addition to the intersection points.

In the present invention, the plurality of pressure sensors 322 may be formed integrally with the circuit pattern 321.

Therefore, the pressure sensors 322 and the circuit pattern 321 can detect a change in the pressure value at the installation position in a state where the pressure sensors 322 and the circuit pattern 321 are installed inside the film portion 310.

The pressure sensors 322 are electrically connected to the control module 330 through the circuit pattern 321.

Accordingly, the control module 330 can receive the pressure value measured or sensed from the pressure sensors 322 through the circuit pattern 321. [

The control module 330 has a preset reference pressure value. When the sensed pressure value exceeds the reference pressure value, the control module 330 determines that leakage occurs, and the pressure sensor 322 You can save the location.

The control module 330 may be installed inside the film part 310 or may be electrically connected to the circuit pattern 321 and positioned outside the pipe 100.

In addition, the control module 330 may display the stored position visually through the display unit 400. FIG.

Next, the operation of the leak detection pipe and pipe installation having the above-described structure will be described.

Fig. 5 shows an example where leakage occurs at an arbitrary position of the pipe.

Referring to FIGS. 4 and 5, the pipe 100 according to the present invention is preferably applied to facilities for connecting waterworks. Of course, it may be adopted in facilities where water circulation is applied in addition to waterworks.

Referring to FIG. 4, a fluid, such as tap water, flows in the pipe 100, and substantially the fluid flows along the hollow of the inner tube 120.

In some cases, leakage may occur at any position of the inner tube 120 as shown in Fig. In this case, a crack is generated at an arbitrary position of the inner tube 120, and the fluid leaks to the outside of the inner tube through the crack.

At this time, the fluid leaking through the cracks applies a substantial pressure to the film portion 310. A pressure sensor 322 installed inside the film part 310 positioned within the predetermined position or range corresponds to a pressure value due to leakage.

The pressure sensor 322 transmits the sensed pressure value to the control module 330.

Here, the control module 330 is preset with a reference pressure value. This preset reference pressure value can be interpreted as a zero point. That is, it may mean that no leakage occurs when the reference pressure value is formed in the pressure sensors 322.

When the sensed pressure value exceeds the reference pressure value, the control module 330 determines that a leak has occurred and stores the position of the pressure sensor 322 that receives the pressure value.

Here, the installation position or coordinate position of the pressure sensors 322 installed in the film part 310 is preset in the control module 330.

The control module 330 may then visually display the position (XA, YA) of the stored pressure sensor 322 through the display unit 400. [

Therefore, the operator can easily confirm the position where the leakage occurred in the pipe 100 through the display unit 400.

On the other hand, the occurrence area of the leakage may be a constant area.

FIG. 6 shows an arrangement position of the pressure sensors for sensing a pressure value changed when a leaked area is formed in a predetermined area.

As shown in FIG. 6, when a crack occurs in the internal pipe 120 of FIG. 5, the pressure sensors 321 detect a pressure value that is changed due to leakage. Here, the pressure detected by the pressure sensors 322 is 1 to 4 (1, 2, 3, 4), and the pressures sensed by the respective pressure sensors 322 are referred to as P1 to P4.

Further, the pressure value has a relationship of P1 > P2 > P3 > P4.

In this case, the first to fourth pressure sensors 322 transmit the measured or sensed pressure values P1 to P2 to the control module 330.

The control module 330 stores the positions of the first to second pressure sensors 322 and determines that a leak has occurred. In addition, the control module 330 determines whether leakage occurs through pressure values at the positions of the pressure sensors 322 Area, and display it on the display unit 400 in a visible manner.

Accordingly, in the present invention, when a leakage occurs in a certain region, the leakage occurrence region is calculated and displayed visually, so that the operator can easily confirm the degree of the leakage occurrence region.

Next, a method of manufacturing the leak detection pipe of the present invention will be described.

8 is a flow chart showing a method of manufacturing a leak detection pipe according to the present invention. Other configurations will be described with reference to Figs. 1 to 7. Fig.

Step 1

First, a hollow outer tube 110 formed of carbon steel is disposed (S10).

Step 2

The leakage detection unit 300 is provided with a film unit 310, a circuit pattern 321, a plurality of pressure sensors 322, and a control module 323, as described above. (330).

Therefore, the leak detection unit 300 is formed to have a certain thickness and flexibility. The water leakage sensing unit 300 is arranged so as to be in close contact with the inner circumference of the outer tube 110 (S20).

The film part 310 of the water leakage sensing unit 300 may be formed in a hollow shape or may be formed in a plate shape so that one end and the other end of the film part 310 are hollow to form a hollow shape. Here, it is preferable that one end and the other end of the film part 310 to be attached to each other are configured so as to be interdigitated and attached through another adhesive agent.

Step 3

After the outer tube 110 is disposed, a hollow inner tube 120 formed of stainless steel is inserted into the outer tube 110 (S30).

Here, the diameter of the inner tube 120 is smaller than the inner diameter of the outer tube 110.

At this time, the inner tube 120 is inserted into the outer tube 110 so that the hollow inner circumference of the leakage sensing unit 300 is closely attached to the outer circumference of the inner tube 120.

Therefore, the leakage sensing unit 300 is installed in the gap G formed between the inner circumference of the outer tube 110 and the outer circumference of the inner tube 120.

Step 4

One end of the outer tube 110 and one end of the inner tube 120 are sealed (S40).

The pressure sensors 322 of the leak detection unit 300 measure the pressure value (S50).

Then, a predetermined amount of molding fluid is supplied to the hollow of the inner tube 120 using a fluid supply device (not shown) (S60).

Accordingly, the inner tube 120 is fired and expanded by the supplied fluid, and the water-leakage detection unit 300 is gradually brought into close contact with the outer tube 110 and the inner tube 120.

At the same time, the pressure sensors 322 transmit the measured pressure values to the control module 330. The control module 330 may be preset with a reference pressure value range.

The control module 330 controls the driving of the fluid supply device such that the transmitted pressure values fall within the reference pressure value range.

Here, if the pressure value to be measured is not included in the predetermined reference pressure value range, the control module 330 continuously supplies the fluid using the fluid supply device to inflate the internal tube 120.

On the other hand, if the measured pressure value is included in the predetermined reference pressure value range (S70), the control module 330 immediately stops driving the fluid supply device to stop supplying the fluid (S80).

Then, the molding is completed (S90).

Therefore, in the present invention, by performing the hydroforming of the inner pipe by using the molding fluid, it can be installed between the outer pipe and the inner pipe so that the zero point of the pressure value of the leak detection unit is stably set.

As described above, according to the embodiment of the present invention, when the phenomenon that the flow of fluid such as tap water is buried in the ground and the fluid leaks to the outside is generated, Changes can be detected immediately.

In addition, the embodiment according to the present invention can monitor the leakage occurrence position in the pipe in real time.

In addition, the embodiment according to the present invention can form and manufacture a pressure measurement film for detecting pressure value change due to leakage, so that it can be mounted on a pipe while maintaining a predetermined initial pressure value.

While the present invention has been particularly shown and described with respect to certain embodiments thereof with reference to the accompanying drawings, it is to be noted that various changes and modifications may be made without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

100: pipe 110: outer pipe
120: internal pipe 300: leak detection unit
310: Film section 320: Pressure sensor section
321: circuit pattern 322: pressure sensor
330: Control module 400: Display unit

Claims

An outer tube having a predetermined length having a hollow shape;
An inner tube inserted into the hollow of the outer tube and having a predetermined length through which the fluid flows; And
And is interposed between the outer tube and the inner tube. And a leak detection unit for detecting a leak by detecting a change in a pressure value when the fluid leaks from the inner tube to the outside of the inner tube.

The method of claim 1,
The outer tube is formed of carbon steel,
The inner pipe is a leak detection pipe, characterized in that formed of stainless material.

The method of claim 1,
The leak detection unit,
A film part interposed between the outer tube and the inner tube;
The leak detection pipe, which is installed inside the film unit and has a pressure sensor unit for detecting a change in pressure values at multiple positions.

The method of claim 3, wherein
The pressure sensor unit,
A circuit pattern formed in a lattice pattern in the entire area inside the film portion,
A plurality of pressure sensors positioned at intersections of the circuit patterns to sense pressure values,
And a control module that has a preset reference pressure value and determines that leakage occurs when the sensed pressure value exceeds the reference pressure value and stores the position of the pressure sensor that forms the reference pressure value or more Features a leak detection pipe.

A pipe formed in a hollow shape to allow the fluid to flow,
And a leak monitoring unit for detecting a change in pressure value due to leakage of the fluid in real time and displaying a position at which the pressure value is changed.

The method of claim 1,
The pipe
A hollow outer tube formed of carbon steel,
And an inner tube which is made of stainless steel and inserted into the hollow of the outer tube and through which fluid flows,
The leak monitoring unit, the pipe equipment, characterized in that for detecting the change in the pressure value when the fluid leaks from the inner tube to the outside.

The method according to claim 6,
The leak monitoring unit,
And is interposed between the outer tube and the inner tube. A leak detection unit for detecting a leak by detecting a change in a pressure value when the fluid leaks from the inner tube to the outside of the inner tube;
And a display unit for displaying the position where the pressure value is changed to the outside.

8. The method of claim 7,
The leak detection unit,
And a film part interposed between the outer tube and the inner tube, and a pressure sensor part installed inside the film part to detect a change in pressure values at a plurality of positions.
The pressure sensor unit,
A circuit pattern formed in a lattice pattern in the entire area inside the film portion,
A plurality of pressure sensors positioned at intersections of the circuit patterns to sense pressure values,
Having a preset reference pressure value, if the detected pressure value is greater than or equal to the reference pressure value, it is determined that leakage occurs, and stores the position of the pressure sensor that forms the reference pressure value or more, and stores it to the display unit. And a control module for transmitting said position.

The method of claim 8,
The control module includes:
When the pressure sensors forming the reference pressure value or more form a plurality of adjacent pressure sensors,
Wherein the display unit displays an area formed by connecting the positions of the plurality of pressure sensors forming the reference pressure value or more.

A first step of preparing a hollow outer tube formed of carbon steel;
A second step of forming a film-shaped leak detection unit in a hollow shape for sensing a change in a pressure value and placing it in close contact with the inner circumference of the outer tube;
A third step of disposing a hollow internal pipe formed of stainless steel in the hollow of the leak detection unit; And
A fourth step of sealing one end of the outer tube and one end of the inner tube and supplying a predetermined amount of molding fluid to the hollow of the inner tube so that the leakage sensing unit is closely contacted between the outer tube and the inner tube, &Lt; / RTI >

The method of claim 10,
In the fourth step,
Measuring a pressure value at a plurality of positions of the leak detection unit,
And the molding fluid is supplied so that the measured pressure value is included in a predetermined reference pressure value range.

The method of claim 10,
In the fourth step,
Wherein a rough surface is formed on both sides of the leak detection unit so as to form a constant frictional force with the inner circumference of the outer tube and the outer circumference of the inner tube.