KR20140015935A - Leakage inspecting apparatus for pipe connection part - Google Patents

Leakage inspecting apparatus for pipe connection part Download PDF

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Publication number
KR20140015935A
KR20140015935A KR1020120082269A KR20120082269A KR20140015935A KR 20140015935 A KR20140015935 A KR 20140015935A KR 1020120082269 A KR1020120082269 A KR 1020120082269A KR 20120082269 A KR20120082269 A KR 20120082269A KR 20140015935 A KR20140015935 A KR 20140015935A
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KR
South Korea
Prior art keywords
pipe
cover
flange
flange portion
covers
Prior art date
Application number
KR1020120082269A
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Korean (ko)
Inventor
최국환
Original Assignee
현대중공업 주식회사
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Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020120082269A priority Critical patent/KR20140015935A/en
Publication of KR20140015935A publication Critical patent/KR20140015935A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
    • G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The present invention relates to a pipe connecting part leak inspection apparatus, and more particularly, a pipe that can check whether the pipe connection is leaked by measuring a change in pressure by injecting high pressure air into a corresponding space after sealing the pipe connecting part. The present invention relates to a connection leak inspection apparatus.
The pipe connecting part leak test apparatus according to the present invention includes a semi-cylindrical first cover having a groove into which one end of a flange portion of a pipe is inserted into an inner surface thereof; A semi-cylindrical second cover having a groove in which the other side of the flange portion of the pipe is inserted, the semi-cylindrical shape coupled to the second cover and completely enclosing the flange portion together with the first cover; An air pump for injecting high-pressure gas into a space in which the flange part is accommodated when the flange parts are inserted into the grooves of the first and second covers by coupling the first and second covers; And, it comprises a pressure gauge for indicating the pressure change of the space accommodated in the flange portion.

Description

Leakage inspection device for pipe connection {LEAKAGE INSPECTING APPARATUS FOR PIPE CONNECTION PART}

The present invention relates to a pipe connecting part leak inspection apparatus, and more particularly, a pipe that can check whether the pipe connection is leaked by measuring a change in pressure by injecting high pressure air into a corresponding space after sealing the pipe connecting part. The present invention relates to a connection leak inspection apparatus.

Inside various large ships or offshore structures, various types of piping lines such as oil pipelines and gas pipelines are installed. Such a pipe line is formed by interconnecting a plurality of pipes by bolts or welding.

Therefore, if there is an error in welding or bolting work connecting each pipe, fluid may leak due to a gap in the pipe connection area. Therefore, after the installation of the pipe line is completed, leak test of the entire pipe line should be performed. To determine whether there is an abnormality in the pipe connection.

1 is a view showing a state in which the leak test for the entire piping line according to the prior art.

As shown in FIG. 1, the leak test for the conventional pipe line is performed by welding a blank flange 20 to each pipe 10 positioned at both ends of the pipe line to close the entire pipe line. An air inlet 21 is formed in the blank flange 20 of the air inlet, and an air pump 30 is connected to the air inlet 21 to blow air into the pipe 10 so that the air flows out of the pipe 10. This is done by checking for leaks.

At this time, when air leaks through the pipe connecting portion A, that is, the gap between the flange portions 11 of the pipe in which the welding or bolting operation is performed, it is determined that there is an abnormality in the pipe connecting portion.

However, the pipe line leakage inspection method according to the prior art had the following problems.

First, in order to seal the pipe line, the work of welding the blank flange 20 to the pipe 10 located at both ends of the pipe line should be performed. Also, the work of removing the blank flange 20 again after the leakage inspection is completed is performed. Because it must be not only a lot of work maneuver but also had a difficult and complicated problem.

Second, the leak test of the entire pipe line also needs to be carried out for the leak test of the pipe connection points 1 to 2, which is a problem, so there was a problem that it takes a lot of time and manpower unnecessarily for the leak test.

An object of the present invention is to provide a pipe connecting part leak inspection apparatus that allows the leak test to be carried out only in the pipe connection portion in question without having to perform a leak test for the entire pipe line.

In order to solve the above problems, the present invention provides a semi-cylindrical first cover in which a groove into which one end of a flange portion of a pipe is inserted is formed on an inner side surface; A semi-cylindrical second cover having a groove in which the other side of the flange portion of the pipe is inserted, the semi-cylindrical shape coupled to the second cover and completely enclosing the flange portion together with the first cover; An air pump for injecting high-pressure gas into a space in which the flange part is accommodated when the flange parts are inserted into the grooves of the first and second covers by coupling the first and second covers; In addition, the present invention provides a pipe connecting part leak inspection apparatus including a pressure gauge displaying a pressure change of a space accommodated in the flange part.

Here, one end of the first and second covers are hinged.

In addition, a packing is installed on the inner surfaces of the first and second covers to be in close contact with the outer surface of the pipe to seal a space in which the flange part is accommodated.

The pipe connecting part leak test apparatus according to the present invention allows only the leak test for a specific pipe connection part according to the operator's choice. Therefore, it is not necessary to always carry out a leak test for the entire pipe line for the leak test as in the prior art can prevent unnecessary manpower and waste of time.

1 is a view showing a state in which the leak test for the entire piping line according to the prior art.
Figure 2 is a perspective view showing the overall structure of the leak connection apparatus for pipe connection according to the present invention.
3 is a view showing a state in which the pipe connecting portion leak test apparatus according to the present invention is installed in the pipe connecting portion.
Figure 4 is a view showing a state in which the leak test of the pipe connection using the pipe connection leak tester according to the present invention.

Hereinafter, preferred embodiments of the present invention in which the above objects can be specifically realized will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and additional description thereof will be omitted in the following.

Figure 2 is a perspective view showing the overall structure of the pipe connecting portion leak test apparatus according to the present invention, Figure 3 is a view showing a state in which the pipe connecting part leak test apparatus according to the present invention is installed in the pipe connection. In addition, Figure 4 is a view showing a state of performing a leak test of the pipe connection using the pipe connection leak tester according to the present invention.

As shown in Figures 2 to 4, the pipe connection leak tester according to the present invention, the first cover 100, the second cover 200, the air pump 300, the pressure gauge 400 It is made to include.

The first cover 100 is a semi-cylindrical member installed in the pipe connecting portion to surround one end of the flange portion 11 (see FIGS. 3 and 4) for interconnecting the pipe 10. A groove 110 into which one end of the flange portion 11 is inserted is formed.

The second cover 200 is a semi-cylindrical member installed in the pipe connecting portion to surround the other end of the flange portion 11 interconnecting the pipe 10, the inner end of the flange portion 11 of the pipe The groove 210 to be inserted is formed.

The second cover 200 is coupled to the first cover 100, and thus, once the first and second covers 100 and 200 are installed in the pipe connection part, one end of the flange part 11 is provided in the groove 110 of the first cover. The other end of the flange portion 11 is inserted into the groove 210 of the second cover so that the flange portion 11 of the pipe is completely surrounded by the first and second covers 100 and 200.

One end of the first and second covers 100 and 200 is coupled to a hinge 500. Therefore, the first and second covers 100 and 200 are coupled and separated by rotating the first and second covers 100 and 200 about the hinge 500.

In addition, fastening plates 120 and 220 having screw holes 121 and 221 for screwing are formed at the other ends of the first and second covers 100 and 200 so that the first and second covers 100 and 200 are coupled to each other.

Therefore, when the first and second covers 100 and 200 are installed in the pipe connection part and the flange part 11 is completely covered by the first and second covers 100 and 200, the screw holes 121 and 221 of the first and second fastening plates 120 and 220 are provided. ) And the bolts 230 are fastened to the screw holes 121 and 221 so that the first and second covers 100 and 200 are firmly coupled.

When the flange part 11 is completely inserted into the grooves 110 and 210 of the first and second covers when the air pump 300 is coupled to the first and second covers 100 and 200, the air pump 300 has a high pressure in a space in which the flange part 11 is accommodated. Inject the gas.

When the first and second covers 100 and 200 are coupled to each other, the grooves 110 and 210 of the first and second covers naturally communicate with each other to form a space in which the flange portion 11 is accommodated. Inject the gas.

Specifically, the air pump 300 is connected to the first cover 100 through a separate hose 310 and the like, as shown in FIG. 4 when the first and second covers 100 and 200 surround the flange portion 11. Similarly, high pressure gas is injected into the space in which the flange part 11 is accommodated. Of course, the air pump 300 may be connected to the second cover 200.

The pressure gauge 400 displays the pressure change in the space in which the high-pressure gas is injected so that the operator can check the leakage of the pipe connection.

When high pressure air is injected into the space accommodating the flange portion 11 by the air pump 300, when there is a gap in the pipe connecting portion, that is, when there is a gap between the flange portions 11, the air is provided in the flange portion 11. Since the pipe 10 is introduced into the pipe 10 through the gap therebetween, the pressure of the space in which the flange 11 is accommodated naturally decreases, which is the flange 11 positioned at the pipe connection when the fluid is transferred to the pipe 10. This means that the fluid leaks into the gap between them, so the operator can confirm that there is a problem in the pipe connection.

On the contrary, if the pressure in the space in which the flange portion 11 is kept is constant, it means that there is no gap between the flange portions 11 located in the pipe connection portion, so that there is no risk of leakage of fluid, so that the operator may have abnormalities in the pipe connection portion. You can see that none.

As a result, the operator can immediately check whether there is an abnormality in the pipe connection by checking the value of the pressure gauge 400 indicating the pressure of the space in which the flange 11 is accommodated.

On the other hand, in order to accurately determine whether the pipe connection leakage, the space in which the flange portion 11 is to be kept airtight. When there is a gap between the first and second covers 100 and 200 and the outer surface of the pipe 10, even if airtightness is maintained between the flanges 11, air leaks to the outside so that the pressure in the space in which the flanges 11 are accommodated is maintained. Because it falls.

Therefore, when the first and second covers are installed in the pipe connection part, the packing 130 and 230 seal the space in which the flange part 11 is accommodated by being in close contact with the outer surface of the pipe 10 when the first and second covers are installed in the pipe connection part. Is preferably installed.

Such packings 130 and 230 are pressurized to the outer surface of the pipe 10 when the first and second covers 100 and 200 are installed at the pipe connection portion to surround the flange portion 11, and the high pressure air supplied by the air pump 300 is provided. By preventing the first and second covers 100 and 200 from escaping to the outside, the leak test of the pipe connection part can be accurately performed.

The process of performing a leak test for the pipe connection using the pipe connection leakage test device according to the present invention configured as described above is as follows.

First, the first cover 100 is installed in the pipe connecting portion so that one end of the flange portion 11 is inserted into the groove 110 of the first cover.

Next, the second cover 200 is rotated about the hinge 500 so that the other end of the flange portion 11 is inserted into the groove of the second cover 200. The branch 11 is to be completely wrapped. At this time, the bolts 230 are coupled to the fastening plates 120 and 220 of the first and second covers 100 and 200 so that the first and second covers 100 and 200 remain coupled while the leakage inspection is in progress.

Thereafter, the air pump 300 is operated to inject a high pressure gas into a space formed by communicating the grooves 110 and 210 of the first and second covers 100 and 200, that is, the space in which the flange portion 11 is accommodated, and a pressure gauge ( Check the change in pressure with 400).

At this time, if there is no change in pressure, it can be seen that there is no gap between the flange portions 11, so that the airtightness of the pipe connecting portion is maintained, so that there is no abnormality in the pipe connecting portion.

On the contrary, if the pressure drops, it means that there is a gap between the flange portions 11, so that it is determined that there is an abnormality in the pipe connection portion, and the following measures are taken, such as replacing a problematic pipe portion.

As such, the pipe connecting part leakage inspection apparatus according to the present invention can be used for leak inspection of pipes installed in buildings or underground as well as ships.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. And are also included in the scope of the present invention.

10: piping 11: flange
100: first cover 110,210: groove
120,220: fastening plate 121, 221: screw hole
130,230 packing 200: second cover
300: air pump 310: hose
400: pressure gauge 500: hinge

Claims (3)

A first cover having a semi-cylindrical shape in which a groove into which one end of the flange portion of the pipe is inserted is formed on the inner side surface;
A semi-cylindrical second cover having a groove in which the other side of the flange portion of the pipe is inserted, the semi-cylindrical shape coupled to the second cover and completely enclosing the flange portion together with the first cover;
An air pump for injecting high-pressure gas into a space in which the flange part is accommodated when the flange parts are inserted into the grooves of the first and second covers by coupling the first and second covers; And,
And a pressure gauge for indicating a pressure change of the space in which the flange part is accommodated. The method according to claim 1,
One end of the first cover, the second cover is connected to the pipe leakage test device, characterized in that the hinge. The method according to claim 1,
An inner surface of the first and second cover is connected to the outer surface of the pipe (Packing) is characterized in that the packing (Packing) for sealing the space accommodating the flange portion is installed leaking device.
KR1020120082269A 2012-07-27 2012-07-27 Leakage inspecting apparatus for pipe connection part KR20140015935A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
KR1020120082269A KR20140015935A (en) 2012-07-27 2012-07-27 Leakage inspecting apparatus for pipe connection part

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160106927A (en) 2015-03-03 2016-09-13 주식회사 국일인토트 A system for monitoring leakage pressure information of flange connection
KR101855162B1 (en) * 2016-12-08 2018-05-04 김윤기 Pipe connect structure and pipe water leak sensing method for watertightness check
KR20180115837A (en) * 2017-04-13 2018-10-24 (주)유니엠 Gasket for connecting pipe and pipe assembly comprising the same
CN109027702A (en) * 2018-08-22 2018-12-18 缙云县辰阳电子有限公司 Gas-jar gas leakage alarm device
CN109186887A (en) * 2018-08-10 2019-01-11 温州市动宠商贸有限公司 A kind of gas-liquid fluid equipment leak detection apparatus
CN109854961A (en) * 2018-12-27 2019-06-07 海宁市英德赛电子有限公司 The leakage detection apparatus of special gas conveyance conduit
CN111141465A (en) * 2019-12-31 2020-05-12 嘉兴学院 Air tightness detection device for welding metal pipeline
CN111412332A (en) * 2020-03-27 2020-07-14 芜湖职业技术学院 Indoor assembled gas connected system
KR20220068074A (en) 2020-11-18 2022-05-25 (주)브이월드코리아 Flange pipe for fluid of high pressure of which leaking test is easy at site
KR102429157B1 (en) * 2021-11-12 2022-08-03 김준범 All-in-one smart clamp
CN115199955A (en) * 2022-07-14 2022-10-18 重庆大学 Long-distance underground pipeline leakage monitoring device
US20220397479A1 (en) * 2021-06-09 2022-12-15 Pratt & Whitney Canada Corp. Leak detection for pressurized fluid systems

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160106927A (en) 2015-03-03 2016-09-13 주식회사 국일인토트 A system for monitoring leakage pressure information of flange connection
KR101855162B1 (en) * 2016-12-08 2018-05-04 김윤기 Pipe connect structure and pipe water leak sensing method for watertightness check
KR20180115837A (en) * 2017-04-13 2018-10-24 (주)유니엠 Gasket for connecting pipe and pipe assembly comprising the same
CN109186887A (en) * 2018-08-10 2019-01-11 温州市动宠商贸有限公司 A kind of gas-liquid fluid equipment leak detection apparatus
CN109027702A (en) * 2018-08-22 2018-12-18 缙云县辰阳电子有限公司 Gas-jar gas leakage alarm device
CN109854961B (en) * 2018-12-27 2020-12-15 海宁市英德赛电子有限公司 Leakage detection device for special gas conveying pipeline
CN109854961A (en) * 2018-12-27 2019-06-07 海宁市英德赛电子有限公司 The leakage detection apparatus of special gas conveyance conduit
CN111141465A (en) * 2019-12-31 2020-05-12 嘉兴学院 Air tightness detection device for welding metal pipeline
CN111412332A (en) * 2020-03-27 2020-07-14 芜湖职业技术学院 Indoor assembled gas connected system
KR20220068074A (en) 2020-11-18 2022-05-25 (주)브이월드코리아 Flange pipe for fluid of high pressure of which leaking test is easy at site
US20220397479A1 (en) * 2021-06-09 2022-12-15 Pratt & Whitney Canada Corp. Leak detection for pressurized fluid systems
US11846568B2 (en) * 2021-06-09 2023-12-19 Pratt & Whitney Canada Corp. Leak detection for pressurized fluid systems
KR102429157B1 (en) * 2021-11-12 2022-08-03 김준범 All-in-one smart clamp
CN115199955A (en) * 2022-07-14 2022-10-18 重庆大学 Long-distance underground pipeline leakage monitoring device
CN115199955B (en) * 2022-07-14 2024-04-16 重庆大学 Long-distance underground pipeline leakage monitoring device

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