KR20120002097A - A water leakage testing device of water pipe - Google Patents

A water leakage testing device of water pipe Download PDF

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Publication number
KR20120002097A
KR20120002097A KR1020100062809A KR20100062809A KR20120002097A KR 20120002097 A KR20120002097 A KR 20120002097A KR 1020100062809 A KR1020100062809 A KR 1020100062809A KR 20100062809 A KR20100062809 A KR 20100062809A KR 20120002097 A KR20120002097 A KR 20120002097A
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KR
South Korea
Prior art keywords
water pipe
air
fixing jig
air supply
fixing
Prior art date
Application number
KR1020100062809A
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Korean (ko)
Inventor
임미경
Original Assignee
임미경
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 임미경 filed Critical 임미경
Priority to KR1020100062809A priority Critical patent/KR20120002097A/en
Publication of KR20120002097A publication Critical patent/KR20120002097A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The present invention relates to a water pipe leak test apparatus, and more particularly, by automatically determining whether a water pipe leaks by using air, a water pipe that can improve the efficiency of the water pipe inspection process and facilitate the operator's convenience. A leak test apparatus.
The water pipe leak test apparatus of the present invention is provided with an upper die, a water pipe support portion installed on the upper die to mount the water pipe on the upper surface, a fixing jig portion for fixing the water pipe supported on the water pipe support portion, and An air distributor for supplying air to the stationary jig unit through a hose, an air supply unit for supplying air to the air distributor, and a control unit for determining whether the water pipe is leaked by operation of the test apparatus and measurement and comparison of air pressure. Characterized in that consisting of the configuration,

Description

WATER LEAKAGE TESTING DEVICE OF WATER PIPE}

The present invention relates to a water pipe leak test apparatus, and more specifically, it is possible to automatically determine whether the water pipe leaks using air to improve the reliability of the water pipe inspection process and improve the manufacturing process yield A water pipe leak test apparatus.

In general, in a car, heating is performed using the heat of the coolant heated in the engine. Once the engine is started, the coolant from the engine passes through the heater unit and enters the engine or radiator, and the heated air passes through the radiator fin of the heater unit. To be heated.

In this case, in order to allow the high temperature coolant to be introduced into and discharged from the heater unit, a coolant passage, that is, a water pipe connecting the engine and the heater unit, must be installed as is known. Heater pipe is connected to the flow can be divided into, and the water return pipe is connected to allow the coolant from the heater unit flows back to the engine.

As such, the heater pipe and the water return pipe, which form a cooling water path between the engine and the heater unit, are usually formed of steel, but recently, are formed of a plastic material that is light and well resistant to heat.

As shown in FIG. 2, the water pipe is generally manufactured and installed in a curved form several times instead of a straight line in consideration of the arrangement of various components in the engine room. In particular, when the water pipe is made of plastic, injection molding methods such as a water injection technology (WIT) method are applied.

As described above, the water pipe is formed in a curved shape in consideration of the arrangement of various components installed in the vehicle, and in particular, in the case of severe bending, the water pipe is manufactured as a separate type instead of an integral type and is separately bound with an adhesive. By using the means (360 in Figure 2) to achieve a curved shape.

Therefore, after the water pipe is manufactured by injection molding, it includes a process of testing whether water flowing into the water pipe leaks to the outside, and through this process, defects in the body and the coupling portion of the water pipe are eliminated. Check if there is any.

To this end, in the prior art, the water pipe was submerged in water, and then air was injected to observe whether or not the air escaped to determine whether or not the defect.

However, the above-described conventional method subsides the water pipe in water, and it is inconvenient, because it is necessary to grasp the state in which bubbles due to the leakage of air with the eyes.

In addition, since the water pipe is submerged in water, and a device for applying air pressure into the water pipe must be separately provided in a state where all the openings of the water pipe are blocked, there is a burden due to the installation of the inspection equipment, and the work is inconvenient. There is a problem that the workability due to the inspection is reduced.

The present invention is to solve the above-mentioned conventional problems, the present invention is applied to the air pipe without submerging the water pipe in water to automatically determine whether the water pipe leaks water pipe leak which can improve the inspection reliability The purpose is to provide a test apparatus.

In addition, the present invention has another object to provide a water pipe leak test apparatus that can improve the inspection efficiency of the water pipe by determining whether the water pipe leaks in a short time, and can facilitate the work.

The water pipe leakage test apparatus of the present invention for achieving the above object is provided on the upper die, the water pipe support is installed on the upper die to mount the water pipe on the upper surface, and the water pipe supported on the water pipe support Water pipe leakage due to the operation of the fixed jig unit, the air distributor for supplying air through the hose to each of the fixing jig units, the air supply unit for supplying air to the air distributor and the test apparatus, and the air pressure measurement and comparison. Characterized in that the configuration comprising a control unit for determining the.

In the above configuration, the water pipe support portion has a predetermined length along the longitudinal direction of the water pipe, the front end and the rear end to form a structure in which a fixed length is protruded to the top to catch the left and right movement of the water pipe is formed. .

The fixing jig unit is configured to include a front fixing jig and a rear fixing jig for fixing the front and rear ends of the water pipe, and a side fixing jig for fixing the side pipes, respectively.

Of the fixing jig part, the front fixing jig and the rear fixing jig have a structure in which a predetermined front end of each fixing jig moves forward by air pressure to block the front end and the rear end opening of the water pipe.

And, the side fixing jig is fixed to the other end of the connection member having one end is fixed to the end of the side pipe, it is preferable that the connection member is formed of a material free of bending.

The air distributor includes an air supply hose through which air is supplied, an air distributor body through which the air is supplied through the air supply hose, and one end is connected to the air distributor body to extend, and the other end of the extension jig is fixed to the fixed jig. Water pipe leak tester consisting of a large number of air supply hoses connected to the negative.

In addition, the air supply unit is provided with a support provided on the upper die, the air supply hose is connected to the support and one end is connected to the air distributor side and the other end connected to the air compressor and a pressure gauge indicating the internal air pressure of the air supply unit It is intended to include a configuration.

The control unit of the present invention includes a control box, an on / off switch formed on an upper surface of the housing of the control box, a pressure control operation button, and an operation state display unit, wherein the control box is provided with a water pipe by supplying air therein. It is to be provided with a control circuit for determining whether or not leaking.

Preferably, the control circuit is configured to include a circuit which determines that a difference between the air pressure supplied into the water pipe and the water pressure inside the water pipe measured after a predetermined time is greater than the set reference air pressure is good, and if it is smaller, a defect. Do.

In addition, it is preferable that the control unit further includes a lamp indicating a passing failure of the water pipe on the upper surface of the control box.

According to the present invention, it is possible to automatically determine whether or not the water pipe leaks by applying air pressure by pressing a button after mounting each opening of the water pipe to the device, thereby greatly improving the efficiency of the water pipe inspection process. Exert.

In addition, the work is easy to exhibit the effect of the fatigue of the worker according to the work.

1 is a perspective view showing the overall structure of a water pipe leak test apparatus according to the present invention,
2 is a perspective view showing the structure of the water pipe used in FIG.

Hereinafter, a preferred embodiment of a water pipe leak test apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the structure of a water pipe leak test apparatus according to the present invention,

FIG. 2 is a view illustrating a shape of a water pipe mounted in FIG. 1.

As shown, the water pipe leak test apparatus 100 according to the present invention forms a structure in which a series of components are arranged on the upper die 10, the upper die 10. The upper die 10 is installed at a predetermined height from the ground to facilitate the work of the operator.

That is, the water pipe leak test apparatus 100 according to the present invention is installed on the upper die 10, the upper die 10, the water pipe support portion for fixing the position by mounting the water pipe 300 on the upper surface 70, a plurality of fixing jigs for fixing the water pipes supported by the water pipe supporter 70, an air distributor 90 for supplying air through a hose to each of the fixing jigs, and the air distributor The air supply unit 80 for supplying air to the (90) side, and the control unit 20 for determining the operation of the test apparatus and whether the water pipe 300 is leaked.

In the above configuration, the fixing jig portion is located on one side of the water pipe support portion 70 and the front fixing jig 30 for fixing the tip side of the water pipe 300, and the other side of the water pipe support portion 70 A rear end fixing jig 60 for fixing the rear end of the pipe 300, side fixing jigs 40 and 50 for fixing end portions of the side pipes 340 and 350 formed on the side of the water pipe 300, and An air distributor 90 for supplying air to the fixing jig 30, 40, 50, and 60 through the hose 93, an air supply unit 80 for supplying air to the air distributor 90, and the upper portion Is provided on the front side of the die 10 consists of a configuration including a control unit 20 for controlling the on / off and operation of the water pipe leak test apparatus.

In the above configuration, as described above, the upper die 10 is installed at a height such that the worker can facilitate the operation, the water pipe support 70, the fixing jig on the upper surface of the upper die 10. 30, 40, 50, 60, the air supply unit 80 and the like has a size area that can be installed a series of components. And, on the surface of the upper die 10, there is formed a binding hole for fixing each of the above-mentioned components, using the fastening bolt (not shown) in the binding hole on the upper die (10) Fix it to

The water pipe support part 70 supporting the water pipe 300 at the bottom has a predetermined length along the longitudinal direction of the water pipe 300, and a fixture 71 protruding a predetermined length upward from the front and rear ends is formed. have. The fixture 71 is formed in a concave shape by inserting the center portion of the upper side of the lower side is a structure that is easy to seat the water pipe 300. Therefore, the water pipe 300 seated on the upper surface of the fixture 71 is blocked in the left, right direction movement.

The fixing jig (30, 40, 50, 60) is a series of fixing means for fixing the water pipe 300 to the test apparatus, is formed on the front, rear and side of the water pipe 300, respectively.

The tip fixing jig 30 and the rear fixing jig 60 have a predetermined portion of the tip of each fixing jig 30 and 60 moving forward by air pressure when the test apparatus is operated so that the tip opening and the rear end of the water pipe 300 are moved forward. Shut off the trailing opening.

In addition, the side pipes 340 and 350 protruding a predetermined length toward the side of the main body 310 of the water pipe 300, the opening of the end thereof is not in direct contact with the side fixing jig 40, 50, the intermediate connecting member (120, 130) It is connected to the fixing jig (40, 50) through.

That is, the side pipes 340 and 350 are coupled to one end of the connection member 120 and 130 at the end thereof, and the other end of the connection member 120 and 130 is connected to the binding portions 41 and 51 of the side fixing jigs 40 and 50. Is bound.

The connecting members 120 and 130 are formed of a flexible material with fluidity so that the ends of the connecting members 120 and 130 are easily inserted into and fixed to the side fixing jigs 40 and 50.

On the other hand, the side fixing jig (40, 50) is exposed so that the connecting member fixing portion (41, 51) to which the ends of the connecting member (120, 130) is attached to the top so that the attachment and detachment of the connection member (120, 130) is easily made. do. That is, to allow the operator to easily insert the ends of the connection members 120 and 130 from the top.

One or three of the connection members 120 and 130 may be used according to the shape of the water pipe 300, and may be formed of a flexible material free of bend for ease of connection. The drawing shows an example in which two connecting members are used.

When the two connecting members 120 and 130 are arranged side by side, there is a possibility of being entangled with each other due to the characteristics of the connecting members 120 and 130 made of a soft material, and thus, an auxiliary mechanism for preventing mutual contact between the two connecting members 120 and 130. Position (113). The auxiliary mechanism 113 is formed in a structure that is moved up and down by the sliding rod 113 in the lower structure 110, when the connecting member (120,130) is not formed to move to the lower structure 110 and To be united. That is, when the auxiliary device 113 protrudes, the space utilization is restricted, so it is preferable that the upper space is sufficiently secured in contact with the lower structure 110 at normal times.

The air distributor 90 of the present invention is located at the rear side of the upper die 10, and supplies the air introduced through the air supply hose 83 to each water pipe fixing jig (30, 40, 50, 60) side Play a role. At this time, the air supply from the air distributor 90 is made by a button operation in the control unit 20, the air is supplied through each hose 93 connected to the air supply unit main body 91.

The air supply unit 80 for supplying air to the air distributor 90 side includes a support 85 installed on the upper die 10, an air supply hose 83 connected to the support 85, and the air supply. A pressure gauge 84 indicating a pressure in the hose 83 and an air supply hose 87 coupled to one side of the pressure gauge 84 and connected to an air compressor (not shown) are configured.

For reference, the air compressor (not shown) may be installed at various positions according to the bottom of the upper die 10 or other work site conditions, and the air supply hose (not shown) according to the position where the air compressor (not shown) is installed. The installation path of 87 may also be modified.

The control unit 20 of the present invention is to be installed on the front side of the upper die 10 so that the worker can easily work.

The control unit 20 of the present invention is a control box 21, the on / off switch 23 formed on the upper surface of the housing of the control box 21, air supply operation buttons (25, 27), the operation state display unit 28 ) And lamps 26 and 29 indicating whether the water pipe passes the test.

The air control operation buttons (25, 27) is a button for instantaneously supplying air to the water pipe fixing jig (30, 40, 50, 60) in the state that the test device is turned on by the on / off switch 23 As a result, the tip portions of the fixing jigs 30, 40, 50, and 60 are moved by air supply, and each end of the water pipe 300 is connected to the fixing jigs 30, 40, 50, and 60 by this operation. It is fixed. When this operation is completed, the water pipe 300 is ready in a state capable of applying a predetermined pressure.

The positions of the air control operation buttons 25 and 27 may be interchanged on the upper die 10. Further, in the two air control operation buttons 25 and 27, one air control operation button 25 or 27 is a button for supplying air, and the other air control operation button 25 or 27 is It may also be configured as a button to operate so that the air pressure in the applied state to the outside.

The operation state display unit 28 provided in the control unit 20 of the present invention is a panel that displays the operation state of the water pipe leakage test apparatus 100 on a screen, and the pressure set and stored in the water pipe leakage test apparatus as a basis. The value, the applied pressure value, the pressure change value after a certain period of time after the pressure application, etc. are displayed.

In addition, two lamps 26 and 29 are formed on the housing of the control box 21. The two lamps 26 and 29 are divided into red or blue, and the water pipe test product showing normal function as a result of the water pipe test is The blue lamp is turned on and the red lamp is turned on for defective water pipes that have a malfunction.

In addition, the control box 21 of the control unit 20 of the present invention calculates the result of testing whether the water pipe leaks, a series of internal circuits to be displayed to the outside through the lamps (26, 29) (Not shown) is provided.

For example, in the internal circuit, when the air pressure is applied to the water pipe and the magnitude of the applied pressure after a predetermined time elapses and the internal air pressure after a predetermined time elapses, the difference is greater than the preset reference pressure value. If it is less than the reference pressure value, the process is regarded as pass, and according to this result, it is controlled to display by the blue lamp 26 or 29 and the reject by the red lamp 26 or 29 respectively.

The operation of the water pipe leak test apparatus of the present invention configured as described above will be described below.

First, the water pipe 300 is settled on the upper portion of the support part 70, and the front and rear ends of the water pipe are set to be positioned near the fixed parts of the front fixing jig 30 and the rear fixing jig 60.

Subsequently, after binding one end of the connecting members 120 and 130 to the ends of the water pipe side pipes 340 and 350, the other ends of the connecting members 120 and 130 are fixed to the fixing parts 41 and 51 of the side fixing jigs 40 and 50. Fix each one.

Next, press the on / off switch 23 of the control unit 20 so that the test apparatus is operated, and press the air supply operation button 25 on one side to fix the front and rear ends of the water pipe 300. The front end of the water pipe 300 is blocked by blocking each opening of the front end and the rear end of the water pipe 300.

Thereafter, the air supply operation button 27 on the other side is pressed to supply air of a predetermined pressure into the water pipe 300. After the pressure is applied, the difference between the initial air pressure set by the internal circuit (not shown) provided in the control unit 20 and the air pressure in the water pipe after a predetermined time has passed after the pressure is applied is calculated. When the calculated pressure value is larger than the reference air pressure value, the determination is made in the case of a defect or when the calculated pressure value is smaller than the reference air pressure value, and it is displayed through the lamps 26 and 29.

After grasping the test result, the applied air pressure is removed to release the bite of each fixing jig, and then the connecting members 120 and 130 are separated, and the water pipe 300 is detached from the final test apparatus 100.

Through the above process, the worker can determine whether or not the water pipe leaks in a short time, and does not need a separate process for the work can be performed more quickly and easily the water pipe test work.

As described above, the water pipe leak test apparatus according to the present invention can automatically determine whether there is a leak in the water pipe by supplying air through the operation button after mounting the water pipe to the support and the fixing jig of the test apparatus The water pipe can be inspected more efficiently, and inconveniences caused by the conventional inspection work can be eliminated.

10: upper die
20: control unit 21: control box
23: on-off switch 25,27: air control operation button 26,29: lamp
30: wort pipe end fixing jig
40,50: Water pipe side fixing jig
60: water pipe rear end jig
70: water pipe support
71: pipe fixture 73: air distribution port 75: air supply hose
80: air supply
83,87: Air supply hose 85: Shoring 87: Pressure gauge
90: air distributor
91: air distributor body 93: air distribution hose
100: water pipe leak test device
110: lower structure 111: sliding rod 113: auxiliary apparatus
300: water pipe

Claims (11)

Upper Daiwa,
A water pipe supporter installed on the upper die to mount the water pipe on the upper surface;
A fixing jig unit for fixing the water pipe supported by the water pipe support unit;
An air distributor for supplying air through the hose to each of the fixing jig parts;
An air supply unit for supplying air to the air distributor;
Water pipe leak testing apparatus including a control unit for determining whether the water pipe leaks by the operation of the test device and the measurement and comparison of air pressure. The method according to claim 1,
The water pipe support portion has a predetermined length along the longitudinal direction of the water pipe, water pipe leakage test apparatus formed in the front and rear end fixed to protrude a predetermined length to the top to catch the left and right movement of the water pipe. The method according to claim 1,
The fixing jig portion is a water pipe leakage test apparatus consisting of a front end fixing jig for fixing the front and rear end of the water pipe and the rear end fixing jig and side fixing jig for fixing the side pipe, respectively. The method according to claim 3,
The tip fixing jig and the rear fixing jig is a water pipe leakage test device consisting of a structure in which a predetermined portion of the front end of each fixing jig is moved forward by air pressure to block the front end and the rear end opening of the water pipe. The method according to claim 3,
The side fixing jig is fixed to the other end of the connection member having one end is fixed to the end of the side pipe, the connection member is water pipe leakage test apparatus is formed of a free bend material. The method according to claim 1,
The air distributor includes an air supply hose through which air is supplied, an air distributor body through which the air is supplied through the air supply hose, and one end is connected to the air distributor body to extend, and the other end of the extension jig is fixed to the fixed jig. Water pipe leak tester consisting of a large number of air supply hose connected to the negative. The method according to claim 1,
The air supply unit includes a support installed on the upper die, an air supply hose connected to the support, one end connected to the air distributor, and the other end connected to an air compressor, and a pressure gauge indicating an internal air pressure of the air supply. Water pipe leak tester composed of a configuration. The method according to claim 1,
The controller includes a control box, an on / off switch formed on an upper surface of the housing of the control box, a pressure control operation button, and an operation state display unit. The method according to claim 8,
The control box is a water pipe leak test apparatus having a control circuit for determining whether the water pipe leaks by the air supply therein. The method according to claim 8,
The control circuit is a water pipe leak test composed of a circuit which determines that the difference between the air pressure supplied into the water pipe and the air pressure inside the water pipe measured after a predetermined time is greater than the set reference air pressure, and if it is small, is bad. Device. The method according to claim 8,
The control unit further comprises a lamp for indicating the passing failure of the water pipe on the upper surface of the control box.
KR1020100062809A 2010-06-30 2010-06-30 A water leakage testing device of water pipe KR20120002097A (en)

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Application Number Priority Date Filing Date Title
KR1020100062809A KR20120002097A (en) 2010-06-30 2010-06-30 A water leakage testing device of water pipe

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Application Number Priority Date Filing Date Title
KR1020100062809A KR20120002097A (en) 2010-06-30 2010-06-30 A water leakage testing device of water pipe

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101390621B1 (en) * 2013-04-10 2014-04-29 박상옥 A method of manufacturing for washing machine drain hose
WO2015041454A1 (en) * 2013-09-17 2015-03-26 코리아에프티 주식회사 Device for inspecting canister for vehicle
CN106546394A (en) * 2016-11-04 2017-03-29 湖南省耐为数控技术有限公司 The system and its using method of leak source are detected and are looked for for motor controller sealing property
KR101875798B1 (en) * 2015-08-27 2018-07-06 절강 리닉스 모터 컴퍼니 리미티드 An equipment for testing air tightness of worm gear speed reducer
KR102095977B1 (en) * 2018-10-16 2020-04-02 주식회사 에스디비 Apparatus for inspecting pet bottle leak
KR102095975B1 (en) * 2018-10-16 2020-04-02 주식회사 에스디비 Apparatus for inspecting pet bottle leak

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101390621B1 (en) * 2013-04-10 2014-04-29 박상옥 A method of manufacturing for washing machine drain hose
WO2015041454A1 (en) * 2013-09-17 2015-03-26 코리아에프티 주식회사 Device for inspecting canister for vehicle
KR101532485B1 (en) * 2013-09-17 2015-06-30 코리아에프티 주식회사 Canister inspection equipment
US9739683B2 (en) 2013-09-17 2017-08-22 Korea Fuel-Tech Corporation Device for inspecting canister for vehicle
KR101875798B1 (en) * 2015-08-27 2018-07-06 절강 리닉스 모터 컴퍼니 리미티드 An equipment for testing air tightness of worm gear speed reducer
CN106546394A (en) * 2016-11-04 2017-03-29 湖南省耐为数控技术有限公司 The system and its using method of leak source are detected and are looked for for motor controller sealing property
KR102095977B1 (en) * 2018-10-16 2020-04-02 주식회사 에스디비 Apparatus for inspecting pet bottle leak
KR102095975B1 (en) * 2018-10-16 2020-04-02 주식회사 에스디비 Apparatus for inspecting pet bottle leak

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