KR102101122B1 - Apparatus and method thereof for water pipe using low nitrogen - Google Patents

Abstract

The present invention provides a device for cleaning a water pipe using low pressure nitrogen, and a method thereof. According to the present invention, the device for cleaning a water pipe using low pressure nitrogen includes: a nitrogen supply unit mounted on one side of a water pipe to clean foreign substances while sensing a leakage in the water pipe, and repeatedly supplying low pressure nitrogen for a predetermined time while controlling the pressure, temperature, and speed of the low pressure nitrogen to 10 kgf/cm^2 or less; and a nitrogen discharge unit mounted on the other side of the water pipe corresponding to a predetermined distance (km) from the nitrogen supply unit, and measuring a discharge pressure and the speed of the low pressure nitrogen when the low pressure nitrogen is discharged. The device for cleaning a water pipe using low pressure nitrogen can safely and efficiently clean the foreign substances such as scale, rust, sludge, and the like by sensing the leakage in the water pipe with the stable low pressure nitrogen which does not influence the pressure in the water pipe.

Description

Apparatus and method for water pipe using low nitrogen

The present invention relates to an apparatus and method for washing water pipes using low pressure nitrogen, and more particularly, to an apparatus and method for washing water pipes using low pressure nitrogen of 10 kgf / cm 2 or less.

In general, inside the water pipe, when the pipe is used for a long time, the pipe diameter decreases or corrosion occurs due to foreign substances such as scale, scale, rust, sludge, etc. It promotes water pollution and deterioration of the pipe, which causes the pipe to be replaced.

The scale generated by the combination of inorganic and organic substances in the water leads to bacterial growth and causes water quality deterioration. During the scale, foreign substances such as capstone accumulate by forming a scale in the water pipe for a long time to narrow the pipe diameter, thereby reducing the flow of water. Interference or oxygen and iron in the water combine to form iron oxide, which causes the rust inside the pipe to continuously oxidize, resulting in a high cost that leads to pipe replacement.

In addition, a method is used in which foreign substances such as scale, rust, and sludge are injected into the inner wall of the pipe to inject washing water and high-pressure compressed air, or by injecting high-pressure nitrogen into the pipe.

However, when foreign matters such as scale, rust, sludge, etc. are injected into the pipe with high pressure compressed air or high pressure nitrogen, cracking or bursting of the pipe occurs due to high pressure during washing.

That is, the water pipe tube body is usually to withstand the pressure of about 8-15kgf / cm2, but the connection part, especially the flexible pipe (cast iron tube, resin tube with a connector) is said to be open on one side due to the nature of the connection part, but it is instantly high pressure of 10kgf / cm2 or more. When applied, an abnormality occurred in the piping and the connecting parts due to the impact, so there was a drawback that water leakage or rupture occurred in the connected parts of the old piping or the piping, and the rubber packing.

When washing foreign substances such as solidified scale with high-pressure compressed air or high-pressure nitrogen, the coating inside the water pipes fell apart with the scale, and there was a disadvantage of contaminating water in the water pipes secondary.

Republic of Korea Utility Model No. 20-0295837 (2002.11.22.) Republic of Korea Registered Patent No. 10-0778430 (2007.11.21.) Republic of Korea Patent Publication No. 10-2017-0049303 (2017.05.10.) Republic of Korea Patent Publication No. 2000-0044996 (2000.07.15.)

The object of the present invention is proposed to solve the problems in consideration of the existing problems, and using low pressure nitrogen that can safely and efficiently clean foreign substances such as scale, rust, and sludge while detecting leaks in the water pipe. It is to provide a cleaning device and method for the water pipe.

The cleaning device for the water pipe using low pressure nitrogen according to the embodiment of the present invention for solving the above technical problem is mounted on one side of the water pipe to detect foreign matter inside the water pipe while detecting a leak, and the low pressure is less than 10kgf / ㎠ Nitrogen supply means for repeatedly supplying low-pressure nitrogen for a predetermined time while adjusting the pressure, temperature, and speed of nitrogen; And a nitrogen discharge means mounted on the other side of the water pipe corresponding to a certain distance from the nitrogen supply means to measure the discharge pressure and speed of low pressure nitrogen when low pressure nitrogen is discharged.

As another embodiment, the nitrogen supply means of the present invention, a plurality of nitrogen inlet pipes each valve is installed to open and close the inflow of low pressure nitrogen; A first body having a nitrogen mixing flow path therein to lower pressure while forming a vortex by joining in one direction by receiving low pressure nitrogen flowing in various directions through the plurality of nitrogen inflow pipes; And a second body having a nitrogen supply channel therein to connect the first body and one side of the water pipe to supply low-pressure nitrogen into the water pipe.

As another embodiment, the first body of the present invention, the first pressure measuring device installed on one side to measure the pressure of the low-pressure nitrogen flowing into the inlet contacting the plurality of nitrogen inlet pipe and the nitrogen mixing flow path; A first speed measuring system installed on one side and measuring the speed of the low-pressure nitrogen discharged to the outlet of the nitrogen mixing channel; A temperature measuring instrument installed on one side to measure the temperature of low-pressure nitrogen passing through the center of the nitrogen mixing flow path; And it is characterized in that it comprises a first pressure control valve installed on one side to adjust the pressure of the low pressure nitrogen passing through the center of the nitrogen mixing flow path.

In another embodiment, the inner diameter of the plurality of nitrogen inlet pipes of the present invention is characterized in that formed about twice as small as the inner diameter of the nitrogen mixing flow path.

As another embodiment, the nitrogen mixed flow path of the present invention is characterized in that the pressure of the low-pressure nitrogen flowing through the plurality of nitrogen inflow pipes is lowered to 1-5 kgf / cm 2 when it is 10 kgf / cm 2 and supplied to the second body side nitrogen supply flow path. Is done.

As another embodiment, the second body of the present invention, the second pressure measuring system is installed on one side to measure the pressure of the low-pressure nitrogen supplied into the water supply pipe from the nitrogen supply flow path; And a second pressure regulating valve installed at one side and regulating the pressure of the low pressure nitrogen passing through the center of the nitrogen supply passage.

In another embodiment, a safety valve is installed on one side of the second body of the present invention to discharge it to the outside of the second body when the pressure of the nitrogen supply passage is greater than or equal to a certain level.

As another embodiment, a nitrogen injector for spraying low-pressure nitrogen toward the inside of the water pipe is installed on one side of the nitrogen supply flow path of the present invention.

As another embodiment, the nitrogen discharge means of the present invention is mounted on the water pipe, the third body having a nitrogen discharge flow path therein so that low-pressure nitrogen and foreign substances are discharged; A third pressure measuring system installed on one side of the third body to measure the pressure of low pressure nitrogen discharged to the outside through the nitrogen discharge flow path from the water pipe to detect leakage; And a second speed measuring device installed on one side of the third body and measuring the speed of low-pressure nitrogen discharged to the outside through the nitrogen discharge flow path from the water pipe.

On the other hand, the cleaning method of the water pipe using the low pressure nitrogen according to an embodiment of the present invention, the step of introducing a low pressure nitrogen into the water pipe to check the crack and damage and leakage of the water pipe; Washing the inside of the water pipe by nitrogen flow control by adjusting the flow rate of the low pressure nitrogen after the water pipe is cracked, damaged, or leak-checked in the pipe leak checking step; And after the nitrogen washing step, washing the remaining nitrogen and foreign substances in the water pipe with water.

In another embodiment, the pipe leak inspection step of the present invention compares and measures the pressure of low-pressure nitrogen discharged through the water pipe after supplying 1-3 kgf / cm 2 of low-pressure nitrogen into the water pipe twice for 10 seconds at 3 minute intervals. It is characterized by checking the leak condition of the water pipe.

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As another embodiment, the supply of low-pressure nitrogen to be introduced into the water pipe of the present invention is measured by measuring the discharge rate of nitrogen with the second speed measuring system of the nitrogen discharge port 313, so that the discharge rate does not exceed the subsonic speed. While supplying the nitrogen discharge port 313 to prevent shock waves caused by supersonic flow, and to wash the water pipe 100 stably without damage. It is characterized by.

In another embodiment, the nitrogen temperature in the nitrogen washing step of the present invention is characterized in that 24-26 ℃.

In another embodiment, the nitrogen velocity in the nitrogen washing step of the present invention is characterized in that less than 1,224km / h (340m / s).

In another embodiment, the distance of the water pipe in the nitrogen washing step of the present invention is characterized in that 0.5-5㎞.

As another embodiment, the water washing step of the present invention is characterized by supplying high-pressure water into the water pipe and discharging it to the outside.

The apparatus and method for washing water pipes using low-pressure nitrogen of the present invention supply stable low-pressure nitrogen of 10 kgf / cm2 or less, which does not affect the pressure inside the water pipes, detects leaks in the water pipes, and scales, rust, and sludge. It has the effect of nitrogen and water washing safely and efficiently.

1 is an external configuration diagram showing a nitrogen supply means of the pipe cleaning apparatus according to the present invention,
Figure 2 is an internal configuration showing the nitrogen supply means of the pipe cleaning apparatus according to the present invention,
Figure 3 is an external configuration showing the nitrogen discharge means of the pipe cleaning apparatus according to the present invention,
Figure 4 is an internal configuration showing the nitrogen discharge means of the pipe cleaning apparatus according to the present invention,
5 is a flow chart of a method for washing a water pipe using low pressure nitrogen according to the present invention;

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments described in detail below. Accordingly, the shape of the elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that the same configuration in each drawing may be indicated by the same reference numeral. Detailed descriptions of well-known functions and configurations that are judged to unnecessarily obscure the subject matter of the present invention are omitted.

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

The apparatus for washing a water pipe using low-pressure nitrogen according to an embodiment of the present invention, as shown in FIGS. 1 to 4, detects a leak inside the water pipe 100 and washes the foreign matter while washing the foreign matter. A nitrogen supply means 200 mounted on one side and repeatedly supplying low-pressure nitrogen for a predetermined time while controlling the pressure, temperature, and speed of the low-pressure nitrogen to 10 kgf / cm 2 or less; And nitrogen discharge means 300 mounted on the other side of the water pipe 100 corresponding to a certain distance from the nitrogen supply means 200 to measure the discharge pressure and speed of low pressure nitrogen when low pressure nitrogen is discharged. It consists of.

That is, the nitrogen supply means 200 is connected to an external nitrogen storage device (not shown), a plurality of nitrogen inlet pipes 214 each having a valve 214a installed to open and close the inflow of low-pressure nitrogen; A first body 210 having a nitrogen mixing flow path 212 therein to reduce pressure while forming a vortex by joining in one direction by receiving low pressure nitrogen flowing in various directions through the plurality of nitrogen inflow pipes 212 ; And a second body 220 having a nitrogen supply passage 222 therein to connect low pressure nitrogen to the inside of the water pipe 100 by connecting one side of the first body 210 and the water pipe 100. It consists of.

At this time, the first body 210 is installed on one side, the first pressure measuring system 230 for measuring the pressure of the low-pressure nitrogen flowing into the inlet contacting the plurality of nitrogen inlet pipe 214 and the nitrogen mixing flow path 212 ); A first speed measuring instrument 240 installed at one side and measuring the speed of the low pressure nitrogen discharged to the outlet of the nitrogen mixing flow path 212; A temperature measuring system 250 installed at one side and measuring the temperature of low-pressure nitrogen passing through the center of the nitrogen mixing flow path 212; And a first pressure regulating valve 260 installed on one side to regulate the pressure of the low pressure nitrogen passing through the center of the nitrogen mixing flow path 212.

The inner diameter of the plurality of nitrogen inlet pipes 214 is formed to be about two times smaller than the inner diameter of the nitrogen mixing flow path 212, and the plurality of nitrogen inlet pipes 214 are respectively 10 kgf / cm 2 or less in the nitrogen mixing flow path ( 212) when the low pressure nitrogen flows in, and the nitrogen mixing flow path 212 lowers the pressure of the low pressure nitrogen flowing through the plurality of nitrogen inflow pipes 214 to 1-5 kgf / cm 2 to lower the second body ( It is configured to supply to the 220) side nitrogen supply flow path (222).

The second body 220, a second pressure measuring system 232 is installed on one side to measure the pressure of the low pressure nitrogen supplied into the water supply pipe 100 from the nitrogen supply flow path 222; A safety valve 270 installed at one side and discharged to the outside of the second body 220 when the pressure of the nitrogen supply passage 222 is greater than or equal to a predetermined level; A second pressure regulating valve 262 installed on one side to regulate the pressure of the low pressure nitrogen passing through the center of the nitrogen supply passage 222; And a nitrogen injector 280 installed on one side of the nitrogen supply passage 222 to stably inject low-pressure nitrogen toward the inside of the water pipe 100.

On the other hand, the nitrogen discharging means 300 is mounted on the water pipe 100, the third body 310 is provided with a nitrogen discharge flow path 312 inside to discharge low pressure nitrogen and foreign matter; A third pressure measuring system 320 installed on one side of the third body 310 to measure the pressure of low-pressure nitrogen discharged from the water pipe 100 through the nitrogen discharge flow path 312 to detect leakage; And a second speed measuring system 330 installed on one side of the third body 310 to measure the speed of low-pressure nitrogen discharged to the outside through the nitrogen discharge flow path 312 from the water pipe 100. have.

 Next, the washing method of the water pipe using the low pressure nitrogen of the present invention, as shown in FIG. 5, by introducing the low pressure nitrogen into the water pipe 100, the crack and damage and leakage state of the water pipe (100) Checking step (S1); A step of washing the inside of the water pipe 100 with nitrogen by adjusting the flow rate of the low-pressure nitrogen after the crack, breakage, and leak check of the water pipe 100 in the pipe leak checking step (S2); And after the nitrogen washing step, washing the remaining nitrogen and foreign substances in the water pipe 100 with water (S3).

At this time, in the pipe leak inspection step (S1), a low pressure nitrogen of 1-3 kgf / ㎠ into the water pipe 100 through the nitrogen supply means 200 connected to the water pipe 100 at 3 minute intervals for 10 seconds 2 The first pressure measuring system 230 of the nitrogen supplying means 200 and the third pressure measuring system 320 of the nitrogen discharging means 300 are supplied to the pressure of the low pressure nitrogen discharged through the nitrogen discharging means 300 after being supplied once. Through the comparative measurement, the leak condition of the water pipe 100 is checked.

The low pressure nitrogen supplied to the inside of the water pipe 100 of the nitrogen washing step (S2) firstly supplies the low pressure nitrogen 10 kgf / cm 2 through the nitrogen inlet pipe 214 for 30 seconds to the inside of the water pipe 100, and supplies The nitrogen is discharged to the open nitrogen discharge port 313 to be discharged to the outside atmosphere, and the pressure inside the water pipe 100 is washed while checking the pressure inside the water pipe 100 so as not to increase more than 5 kgf / cm 2.
And secondly, if the pressure inside the water pipe 100 does not rise above 5 kgf / cm 2 in the first phase, 10 kgf / cm 2 of low-pressure nitrogen is supplied for 60 seconds, and the inside of the water pipe 100 depends on the progress rate of the supplied nitrogen gas. By washing.
At this time, the supply of low pressure nitrogen introduced into the inside of the water pipe 100 measures the discharge rate of nitrogen by the second speed measuring system 330 of the nitrogen discharge port 313 so that the discharge speed does not exceed the subsonic speed. By supplying while checking, the nitrogen discharge port 313 does not generate a shock wave due to supersonic flow, and the water pipe 100 is stably washed without damage.

In the nitrogen washing step (S2), the nitrogen temperature is maintained at 24-26 ° C through the temperature measuring system 250 of the nitrogen supply means 200, and the nitrogen speed is maintained at 1,224 km / h (340 m / s) or less. And, the distance between the nitrogen supply means 200 and the nitrogen discharge means 300 is equipped with a water pipe 100 is preferably maintained at 0.5-5㎞.

In the water washing step (S3), clean tap water is supplied into the water pipe 100 to which the nitrogen supply means 200 is connected, so that the desorbed foreign substances remaining inside the water pipe 100 through the nitrogen discharge means 300 After washing to discharge (discharge) to the outside, then check the adequacy of water quality (turbidity, etc.), and then restore the original state.

On the other hand, the present invention is not limited only to the above-described embodiments, but can be modified and modified without departing from the gist of the present invention, and the technical idea to which such modifications and modifications have been applied also belongs to the following claims. Must see.

100: water pipe 200: nitrogen supply means
210: first body 212: nitrogen mixed flow path
214: nitrogen inlet pipe 214a: valve
220: second body 222: nitrogen supply flow path
230: first pressure measuring system 240: first speed measuring system
250: temperature measuring instrument 260: first pressure control valve
270: Safety valve 280: Nitrogen sprayer
300: nitrogen discharging means 310: third body
312: nitrogen discharge passage 313: nitrogen discharge outlet
320: third pressure measuring system 330: second speed measuring system

Claims (17)

It is mounted on one side of the water pipe (100) to detect foreign substances inside the water pipe (100) and wash the foreign substances, while supplying low pressure nitrogen repeatedly for a certain period of time while adjusting the pressure, temperature, and speed of the low pressure nitrogen to 10 kgf / ㎠ Nitrogen supply means (200); And
Nitrogen discharge means (300) for measuring the discharge pressure and speed of low pressure nitrogen when it is mounted on the other side of the water supply pipe (100) corresponding to a certain distance (㎞) from the nitrogen supply means (200) is discharged Cleaning device for water pipes using low pressure nitrogen, characterized in that it comprises. The method according to claim 1,
The nitrogen supply means 200,
A plurality of nitrogen inlet pipes 214, each of which is provided with a valve 214a to open and close the inflow of low pressure nitrogen;
A first body 210 having a nitrogen mixing flow path 212 therein to reduce pressure while forming a vortex by joining in one direction by receiving low pressure nitrogen flowing in various directions through the plurality of nitrogen inflow pipes 212 ; And
Includes a second body 220 having a nitrogen supply flow path 222 therein to connect low pressure nitrogen to the inside of the water pipe 100 by connecting one side of the first body 210 and the water pipe 100 Washing apparatus of the water pipe using low pressure nitrogen, characterized in that. The method according to claim 2,
In the first body 210,
A first pressure measuring system 230 installed at one side to measure the pressure of the low pressure nitrogen flowing into the inlet where the plurality of nitrogen inflow pipes 214 and the nitrogen mixing flow path 212 come into contact;
A first speed measuring instrument 240 installed at one side and measuring the speed of the low pressure nitrogen discharged to the outlet of the nitrogen mixing flow path 212;
A temperature measuring system 250 installed at one side and measuring the temperature of low-pressure nitrogen passing through the center of the nitrogen mixing flow path 212; And
It is installed on one side of the nitrogen mixing flow path (212) to control the pressure of the low pressure nitrogen passing through the center of the first pressure control valve 260, characterized in that it comprises a washing device for water pipes using low pressure nitrogen. The method according to claim 3,
The plurality of nitrogen inlet pipes 214, the inner diameter of the nitrogen mixing flow path 212, the inner diameter of the water pipe using a low pressure nitrogen, characterized in that formed smaller than twice the inner diameter. The method according to claim 4,
The nitrogen mixture flow path 212 is lowered to 1-5 kgf / cm 2 when the pressure of the low pressure nitrogen flowing through the plurality of nitrogen inflow pipes 214 is 10 kgf / cm 2, the nitrogen supply flow path 222 on the side of the second body 220 Washing apparatus of the water pipe using low pressure nitrogen, characterized in that to supply to. The method according to claim 5,
In the second body 220,
A second pressure measuring system 232 installed on one side to measure the pressure of low-pressure nitrogen supplied from the nitrogen supply flow path 222 into the water pipe 100; And
A washing device for water pipes using low pressure nitrogen, which is installed on one side and includes a second pressure control valve (262) for adjusting the pressure of the low pressure nitrogen passing through the center of the nitrogen supply passage (222). The method according to claim 6,
Water piping using low pressure nitrogen, characterized in that a safety valve 270 is installed on one side of the second body 220 to discharge the pressure of the nitrogen supply passage 222 to the outside of the second body 220 when the pressure is higher than a certain level. Washing machine. The method according to claim 6,
A washing device for water pipes using low pressure nitrogen, characterized in that a nitrogen injector 280 is installed on one side of the nitrogen supply flow path 222 to inject low pressure nitrogen toward the inside of the water pipe 100. The method according to claim 1,
The nitrogen discharge means 300,
A third body 310 mounted on the water pipe 100 and having a nitrogen discharge flow path 312 inside to discharge low pressure nitrogen and foreign matter;
A third pressure measuring system 320 installed on one side of the third body 310 to measure the pressure of low-pressure nitrogen discharged from the water pipe 100 through the nitrogen discharge flow path 312 to detect leakage; And
It is installed on one side of the third body 310, characterized in that it comprises a second speed measuring system 330 for measuring the speed of the low pressure nitrogen discharged to the outside through the nitrogen discharge flow path 312 from the water pipe (100) Cleaning device for water pipe using low pressure nitrogen. Step of checking the crack and damage and the leak state of the water pipe (100) by introducing low pressure nitrogen into the water pipe (100) (S1);
A step of washing the inside of the water pipe 100 with nitrogen by adjusting the flow rate of the low-pressure nitrogen after the crack, breakage, and leak check of the water pipe 100 in the pipe leak checking step (S2); And
After the nitrogen washing step, the washing method of the water pipe using low pressure nitrogen, characterized in that it comprises the step of washing the remaining nitrogen and foreign substances in the water pipe (100) (S3). The method according to claim 10,
The pipe leak inspection step (S1) is to supply the pressure of low pressure nitrogen discharged through the water pipe 100 after supplying the low pressure nitrogen of 1-3kgf / ㎠ to the inside of the water pipe 100 twice for 3 seconds at 3 minute intervals. A method of washing a water pipe using low pressure nitrogen, characterized in that it checks the leak condition of the water pipe 100 by comparative measurement. delete The method according to claim 10,
The supply of low pressure nitrogen introduced into the water pipe 100 is measured by measuring the discharge rate of nitrogen with the second speed measuring system 330 of the nitrogen discharge port 313 while checking that the discharge speed does not exceed the subsonic speed. By supplying the nitrogen discharge port (313) so that the shock wave (shock wave) caused by the supersonic flow does not occur, the washing method of the water pipe using low pressure nitrogen, characterized in that the water pipe 100 is stably washed without damage. The method according to claim 10,
In the nitrogen washing step (S2), the nitrogen temperature is 24-26 ℃, characterized in that the washing method of the water pipe using low pressure nitrogen. The method according to claim 10,
In the nitrogen washing step (S2), the nitrogen speed is 1,224 km / h (340 m / s) or less, characterized in that the washing method of the water pipe using low pressure nitrogen. The method according to claim 10,
In the nitrogen washing step (S2), the distance of the water pipe 100 is 0.5-5㎞, characterized in that the washing method of the water pipe using low pressure nitrogen. The method according to claim 10,
The water washing step (S3) is a method of washing water pipes using low pressure nitrogen, characterized in that the water is discharged to the outside by supplying high pressure water to the inside of the water pipe (100).

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