KR20170028087A - Multi cable transit leak tester - Google Patents

Multi cable transit leak tester Download PDF

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Publication number
KR20170028087A
KR20170028087A KR1020150124920A KR20150124920A KR20170028087A KR 20170028087 A KR20170028087 A KR 20170028087A KR 1020150124920 A KR1020150124920 A KR 1020150124920A KR 20150124920 A KR20150124920 A KR 20150124920A KR 20170028087 A KR20170028087 A KR 20170028087A
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KR
South Korea
Prior art keywords
compressed air
leak
sealing agent
compressor
present
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Application number
KR1020150124920A
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Korean (ko)
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KR101724443B1 (en
Inventor
이규혁
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삼성중공업 주식회사
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Priority to KR1020150124920A priority Critical patent/KR101724443B1/en
Publication of KR20170028087A publication Critical patent/KR20170028087A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • 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
    • G01M3/2838—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 cables

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

Abstract

The present invention provides a leak test apparatus. A leak test apparatus of the present invention includes: a compressed air injection unit for applying compressed air to an inspection region of an object to be inspected; A leak detecting unit for checking whether the subject is leaking; And a repair unit for repairing the leaked portion by spraying a sealing agent on the leaked portion of the test object.

Description

[0001] MULTI CABLE TRANSIT LEAK TESTER [0002]

The present invention relates to a multi-cable transit leak test apparatus and method for use in an air leak test for a multi-cable transit insert block (MCT) will be.

Ships and marine and onshore plants include indoor spaces for various purposes such as a crew room, a room, a cargo room, an engine room, and a control room (hereinafter collectively referred to as a "cabin"). Each cabin is divided into wall bulkheads and ceiling bulkheads And a plurality of cables are installed so as to penetrate a partition wall partitioning the cabin for power supply and control in the ship.

The above-mentioned partition walls partition the cabins to prevent flames and heat from being transferred to other cabins by cables during the fire of the cabins, to block all pollution, heat and smoke generated by other causes, In order to prevent damage to the cable, a multi-cable transformer called a cable bulkhead device is used.

In the multi-cable transformer construction method, a frame is installed in a through hole of a partition through which multiple cables are penetrated, an insert moduler is installed in the cable, a space in which the insert modular is installed is closed, .

In this case, the multi-cable transformer is subjected to a leak test to check the airtightness. If the airtightness is not satisfied due to a leak due to a minute gap, the insert moduler is disassembled and reassembled to perform a leak test. .

Korean Patent Publication No. 10-2013-006121710 (Publication date 2013.06.11)

It is an object of the present invention to provide a multi-cable transit leak test apparatus and method in which a cable is used to test leakage of a multi-cable transformer in which a cable is installed to seal the leak portion in case of leakage.

An object of the present invention is to provide a multi-cable transit leak test apparatus and method that can easily perform leak test and leak repair.

The problems to be solved by the present invention are not limited thereto, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a compressed air injection system comprising: a compressed air injection unit for applying compressed air to an inspection area of an object to be inspected; A leak detecting unit for checking whether the subject is leaking; And a repair part for repairing the leak part by spraying a sealing agent to the leak part of the test object.

The control unit may further include a controller for controlling the spraying of the sealant depending on whether the test object provided from the leak detecting unit is leaked.

The compressed air injection unit may include a compressor; A first opening / closing valve connected to the compressor through an air supply pipe for opening / closing compressed air supplied from the compressor; And an injection tube connected to the first opening / closing valve and for injecting compressed air into an inspection area of the test object, wherein the repair part comprises: a container in which the sealing agent is stored; A sealing agent connection tube connected to the injection tube to which the compressed air is supplied so that the sealing agent is sprayed to the inspection region of the test subject by the air pressure of the compressed air; And a second on-off valve installed on the sealing connection pipe.

Further, a venturi pipe may be installed in the injection tube, and the sealing connection pipe may be connected to the venturi pipe.

Also, the object to be inspected may be a multi-cable transit.

According to an aspect of the present invention, there is provided a method of testing an object to be inspected, Detecting a change in the pressure value of the compressed air in the inspection area to determine whether the inspection object is leaking; And a step of spraying a sealing agent into the inspection area of the inspection object when the leakage of the inspection object is determined, thereby repairing the leaked portion of the sealing agent sprayed.

Also, in the repairing step, the compressed air and the sealing agent may be mixed and sprayed to the inspection area using the venturi effect of the compressed air supplied to the inspection area of the inspection object.

According to the embodiment of the present invention, there is a remarkable effect that the leak test and the leak repair are possible.

The effects of the present invention are not limited to the above-mentioned effects, and the effects not mentioned can be clearly understood by those skilled in the art from the present specification and the accompanying drawings.

1 is a configuration diagram showing a leak test apparatus according to an embodiment of the present invention.
2 is a view showing a connection structure of the injection tube and the sealant connection pipe.
3 is a flowchart of a leak test method according to an embodiment of the present invention.
4 is a view showing a state where the leak test apparatus of the present invention is connected to a multi-cable transformer.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout the specification and claims. The description will be omitted.

1 is a view showing a leak test apparatus according to an embodiment of the present invention, and FIG. 2 is a view showing a connection structure of an injection tube and a sealant connection pipe.

1 and 2, the leak test apparatus 10 includes a compressed air injection unit 100, a leak detection unit 200, a repair unit 300, and a control unit 400.

The compressed air injection unit 100 may include a compressor 110, a first opening / closing valve 120, and an injection tube 130 to apply compressed air to an inspection area of the test object.

The compressor 110 comprises a manual air pump which is easy to install and transport, and an electric air compressor can be used if necessary.

The first on-off valve 120 is installed on the pipe 180 and connected to the compressor 110. The first on-off valve 120 is provided for opening and closing the compressed air supplied from the compressor 110.

The injection tube 130 may be configured to be able to inject compressed air by inserting it into a proper position in the test object using a flexible air tube. One end of the injection tube 130 is connected to a pressure gauge 210 installed on the pipe 180 and the injection pipe 140 can be connected to the other end of the injection tube 130 so as to be inserted into the test object.

The leak detecting unit 200 can be configured to check whether the leaked object is leaked. For example, the leak detecting unit 200 may include a pressure gauge 210 indicating the air pressure to be installed on the pipe 180. The pressure gauge 210 is digital and the checked pressure value may be provided to the controller 400.

The repair unit 300 may be configured to repair the leak site by spraying a sealing agent on the leak site of the test subject. For example, the repair unit 300 may include a container 310, a sealant connection pipe 320, and a second open / close valve 330.

In the container 310, a sealing agent in a liquid state is stored. The sealing connection pipe 320 is connected to the injection tube 130 to which the compressed air is supplied so that the sealing agent stored in the container by the air pressure of the compressed air is sprayed to the inspection area of the inspection object. The second on-off valve 330 is installed on the sealing connection pipe 320 and is controlled by the control unit 400 so that the second on-off valve 330 is opened only when there is a leak in the inspection object.

The control unit 400 controls the spraying of the sealing agent according to whether or not the object to be inspected provided from the leak detecting unit 200 is leaked.

On the other hand, the injection tube 130 includes a venturi tube 150 having a Bernoulli configuration. This is based on Bernoulli's principle that the pressure decreases as the flow velocity increases as the flow rate passes through the narrowed cross-sectional area (154 in FIG. 2) of the channel, and the pressure increases as the flow velocity decreases at the wide cross-sectional area. It is a well-known fact that the flow rate for a certain period of time is the same at any arbitrary point in the venturi tube 150 as a result of the energy conservation law.

As shown in FIG. 2, the venturi pipe 150 forms a channel through which compressed air supplied from the compressor 110 to the test object is passed. The inner diameter of the venturi pipe 150 at one side of the channel, It gradually decreases and then gradually expands. Diameter portion 152 having a large inner diameter is formed on both end portions of the venturi pipe 150. A small diameter portion 154 is formed between the large diameter portion 152 and the large diameter portion 152, .

Therefore, since the venturi pipe 150 forms the large-diameter portion 152 and the small-diameter portion 154 as described above, the compressed air passing through the pipe is separated from the large-diameter portion 152 and the small- Thereby causing a pressure drop in the channel.

The diameter of the large diameter portion 152 and the diameter of the small diameter portion 154 of the venturi pipe 150 and the water head difference consider the matters such as the flow rate and the speed of the compressed air flowing into the duct of the venturi pipe 150 And therefore, it is not particularly limited to any specific value.

It is preferable that the sealing connection pipe 320 is provided to communicate with the small diameter portion 154 of the venturi pipe 150. That is, the sealing connection pipe 320 is connected to the inflow portion 156, which communicates with the small diameter portion 154 of the venturi pipe 150. The sealing agent stored in the container can be discharged in the flow direction of the compressed air passing through the duct of the venturi pipe 150 due to the pressure drop of the compressed air generated in the venturi pipe 150.

2, when compressed air flows into the large-diameter portion 152 of the venturi pipe 150 through the injection tube 130, the flow velocity of the compressed air in the small diameter portion 154 of the venturi pipe 150 The sealant is introduced through the inlet 156 to be mixed with the compressed air and then sprayed to the inspection area of the test object through the injection tube 130 via the large diameter portion 152 which gradually widens .

The leak test procedure of the multi-cable transformer using the leak test apparatus according to the embodiment of the present invention will now be described.

FIG. 3 is a flow chart of a leak test method according to an embodiment of the present invention, and FIG. 4 is a view showing a state where the leak test apparatus of the present invention is connected to a multi-cable transformer.

3 and 4, the leak test method includes injecting compressed air into the inspection area of the multi-cable transformer 30, detecting changes in the pressure of the compressed air inside the inspection area, 30) and spraying a sealing agent into the inspection area of the multi-cable transformer (30) in the leak judgment of the multi-cable transformer (30) to repair the leaking portion do.

In the compressed air injection step, the injection pipe 140 is inserted into the insert module 24 mounted on the frame 32 of the multi-cable transformer 30 installed on the partition 20, and the compressed air . Reference numeral 40 denotes a multi-cable which is installed through the multi-cable transformer 30.

The compressed air injected from the compressor 110 is filled into the inner space of the multi-cable transformer 30 through the first opening / closing valve 120, the pressure gauge 210, the injection tube 130, and the injection pipe 140 . The compressor 110 is operated while the pressure gauge 210 is being viewed until the preset test pressure is reached, and the pressure is manually adjusted to the test pressure.

When the test pressure is determined, the leakage determination step checks the pressure fluctuation of the pressure gauge 210 while keeping the state for the test time, determines whether the airtightness is maintained, and performs the airtightness inspection.

When pressure fluctuation of the pressure gauge 210 occurs in the determination of the leak, it is determined that leak has occurred, and the leak repair step is executed. In the leak repairing step, the compressed air is supplied using the compressor 110 and the sealing agent stored in the container 310 is compressed through the pipeline of the venturi pipe 150 by the pressure drop of the compressed air generated in the venturi pipe 150 And the sealing agent is sprayed together with compressed air in the inner space (inspection area) of the multi-cable transformer 30. The sprayed sealant slowly seals the leak and seals the gap.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Compressed air injection unit 200: Leak detection unit
300: repair part

Claims (4)

A compressed air injection unit for applying compressed air to an inspection area of the inspection object;
A leak detecting unit for checking whether the subject is leaking; And
And a repairing portion for repairing the leaked portion by spraying a sealing agent to the leaked portion of the test object. The method according to claim 1,
And a control unit for controlling the spraying of the sealing agent according to whether or not the object to be inspected provided from the leak detecting unit is leaked. 3. The method according to claim 1 or 2,
The compressed air injection unit
Compressor;
A first opening / closing valve connected to the compressor through an air supply pipe for opening / closing compressed air supplied from the compressor; And
And an injection tube connected to the first opening / closing valve for injecting compressed air into an inspection area of the test object,
The repair part
A container in which the sealing agent is stored;
A sealing agent connection tube connected to the injection tube to which the compressed air is supplied so that the sealing agent is sprayed to the inspection region of the test subject by the air pressure of the compressed air; And
And a second on-off valve installed on the sealing connection pipe. The method of claim 3,
Wherein the injection tube is provided with a venturi tube and the sealing connection tube is connected to the venturi tube.

KR1020150124920A 2015-09-03 2015-09-03 Multi cable transit leak tester KR101724443B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150124920A KR101724443B1 (en) 2015-09-03 2015-09-03 Multi cable transit leak tester

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KR101724443B1 KR101724443B1 (en) 2017-04-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112113726A (en) * 2020-09-27 2020-12-22 江南造船(集团)有限责任公司 Tightness test method for cable pipe of deepwater multi-beam system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008023764A (en) * 2006-07-19 2008-02-07 Bridgestone Corp Sealing pumping-up device
KR100898310B1 (en) * 2008-06-13 2009-05-21 류재용 The burying pipe repair method using air press
KR20130061217A (en) 2011-12-01 2013-06-11 극동일렉콤주식회사 Multi layer insert block sheet for multi cable transit using thermoplastic vulcanizate
KR20140124691A (en) * 2013-04-17 2014-10-27 태원물산주식회사 Leak inspection apparatus using pressure-difference and leak inspection method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008023764A (en) * 2006-07-19 2008-02-07 Bridgestone Corp Sealing pumping-up device
KR100898310B1 (en) * 2008-06-13 2009-05-21 류재용 The burying pipe repair method using air press
KR20130061217A (en) 2011-12-01 2013-06-11 극동일렉콤주식회사 Multi layer insert block sheet for multi cable transit using thermoplastic vulcanizate
KR20140124691A (en) * 2013-04-17 2014-10-27 태원물산주식회사 Leak inspection apparatus using pressure-difference and leak inspection method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112113726A (en) * 2020-09-27 2020-12-22 江南造船(集团)有限责任公司 Tightness test method for cable pipe of deepwater multi-beam system
CN112113726B (en) * 2020-09-27 2022-06-14 江南造船(集团)有限责任公司 Tightness test method for cable pipe of deepwater multi-beam system

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