KR102581149B1 - Non-destructive inspection system capable of performing both vacuum leakage inspection and phased array ultrasonic inspection for storage tanks - Google Patents

Abstract

The present invention includes: a vacuum box formed to depressurize the interior for vacuum leak testing of a storage tank and provided with a window through which bubbles can be confirmed; and a phased array ultrasonic inspection device coupled to the vacuum box and performing phased array ultrasonic inspection of the storage tank, wherein the phased array ultrasonic inspection device is coupled to the vacuum box and has a hollow portion corresponding to the window. frame; a screw guide installed to extend in one direction on the frame; a motor configured to rotate the screw guide clockwise or counterclockwise; a moving unit installed on the screw guide and capable of moving along the screw guide by rotation of the screw guide according to driving of the motor; and a probe coupling unit coupled to the moving unit to face the outer surface of the vacuum box, moves with the moving unit, and has a probe in contact with the storage tank detachably coupled to the vacuum leak test and phase. Disclosed is a non-destructive testing system capable of performing array ultrasound testing.

Description

Non-destructive testing system that can perform both vacuum leak testing and phased array ultrasonic testing for storage tanks

The present invention relates to a non-destructive testing system that can perform both vacuum leak testing and phased array ultrasonic testing on storage tanks.

Among non-destructive testing techniques, representative techniques for detecting defects in welded parts of storage tanks and evaluating reliability include vacuum leak testing and phased array ultrasonic testing.

In the vacuum leak test, the test surface of the welded part of the storage tank is reduced to a vacuum or close to it, and gas leakage caused by the pressure difference between the test surface and the opposite surface is confirmed through the formation of bubbles in the foaming liquid applied to the test surface. This is a test method that detects the location of a leak.

Phased array ultrasonic testing is a test method that detects internal defects in a storage tank using changes in acoustic properties when ultrasonic waves are propagated to the welded joint of the storage tank.

Typically, a vacuum box is used for vacuum leak testing, and a phased array ultrasonic inspection scanner is used for phased array ultrasound testing, and these two tests are conducted separately.

Therefore, in order for the operator to perform the two tests, there is the inconvenience of having to separately equip equipment for each test.

In addition, in the case of phased array ultrasonic inspection, a worker must usually operate a phased array ultrasonic inspection scanner to check the presence of cracks in the weld joint or discontinuous defects inside the storage tank. Accordingly, phased array ultrasound testing has a problem in that it is difficult to ensure consistency of test results because the operator's level of skill affects the test results.

The first purpose of the present invention is to provide a non-destructive testing system that can perform both vacuum leak testing and phased array ultrasonic testing on storage tanks (for example, high manganese steel LNG storage tanks).

The second purpose of the present invention is to provide a non-destructive inspection system that can automatically perform phased array ultrasonic inspection without the need for an operator to directly operate the phased array ultrasonic inspection device.

The third purpose of the present invention is to provide a non-destructive testing system that allows operators to more systematically perform vacuum leak testing and phased array ultrasonic testing on storage tanks.

In order to achieve the object of the present invention described above, the present invention includes: a vacuum box formed to depressurize the inside for vacuum leakage testing of a storage tank and provided with a window through which foam generation can be confirmed; and a phased array ultrasonic inspection device coupled to the vacuum box and performing ultrasonic inspection of the storage tank, wherein the phased array ultrasonic inspection device includes: a frame coupled to the vacuum box and having a hollow portion corresponding to the window; A screw guide installed to extend in one direction on the frame; a motor configured to rotate the screw guide clockwise or counterclockwise; a moving unit installed on the screw guide and capable of moving along the screw guide by rotation of the screw guide according to driving of the motor; and a probe coupling unit coupled to the moving unit so as to face the outer surface of the vacuum box, moving with the moving unit, and having a probe in contact with the storage tank detachably coupled thereto, wherein the probe is connected in accordance with the driving of the motor. Discloses a non-destructive testing system capable of performing both a vacuum leak test and a phased array ultrasound test on a storage tank, which is formed to be movable on the storage tank from the outside of the vacuum box along one or the other direction.

The moving unit includes a screw bearing screwed to the screw guide; And it may include a moving bar coupled to the screw bearing and disposed perpendicular to the screw guide, and the probe coupling unit may be formed to be coupled to the moving bar.

The moving unit includes a connecting member coupled to the moving bar; And it may further include at least one guide wheel coupled to the connecting member and in rolling contact with a side of the frame.

The at least one guide wheel may be disposed to face the inner and outer surfaces of the frame, respectively, and be in rolling contact with the inner and outer surfaces of the frame, respectively.

A guide groove in which at least a portion of the guide wheel is accommodated may be formed to extend on the inner and outer surfaces of the frame.

The probe coupling unit includes a bracket coupled to the moving bar; a first extension member coupled to the bracket; a second extension member coupled to the first extension member to be relatively movable and to which the probe is detachably coupled; and a spring respectively connected to the first extension member and the second extension member to provide elastic force to press the probe toward the storage tank.

The bracket may be provided with a curved groove, and the first extension member may be formed to be fixable at a preset position of the groove.

The non-destructive inspection system is coupled to the moving unit to face the outer surface of the vacuum box, moves with the moving unit, and is coupled to an encoder formed to detect the moving distance of the moving unit by rolling contact with the storage tank. It may further include an encoder coupling unit.

In addition, the present invention includes a frame coupled to a vacuum box formed to depressurize the inside for vacuum leakage testing of a storage tank and having a hollow portion corresponding to the window of the vacuum box; A screw guide installed to extend in one direction on the frame; a motor configured to rotate the screw guide clockwise or counterclockwise; a moving unit installed on the screw guide and capable of moving along the screw guide by rotation of the screw guide according to driving of the motor; and a probe coupling unit coupled to the moving unit so as to face the outer surface of the vacuum box, moving with the moving unit, and having a probe in contact with the storage tank detachably coupled thereto, wherein the probe is connected in accordance with the driving of the motor. Discloses a phased array ultrasonic flaw detection device that is formed to be capable of moving on a storage tank in one direction or the other direction outside the vacuum box.

In addition, the present invention includes a first step of performing a vacuum leak test by installing a vacuum box having a window through which bubbles can be checked in the first area of the storage tank; A second step of performing phased array ultrasonic inspection in the vicinity of the first area using a phased array ultrasonic inspection device coupled to the vacuum box; A third step of performing a vacuum leak test by moving and installing the vacuum box to a second area partially overlapping the first area; And a fourth step of performing phased array ultrasonic inspection of the vicinity of the second area using the phased array ultrasonic inspection device, and after the second step, the bottom of the vacuum box is located in the first area of the storage tank. A specific mark is left by the surface, and in the third step, the vacuum box is moved and installed in the second area so that the bottom surface of the vacuum box overlaps a portion of the left mark, and a vacuum leak test for the storage tank. A non-destructive testing method that can be performed together with phased array ultrasound testing is disclosed.

The effects of the present invention obtained through the above-described solution are as follows.

First, by providing a non-destructive inspection system that integrates a vacuum box and a phased array ultrasonic inspection device, workers can inspect a storage tank (e.g., Both vacuum leak testing and phased array ultrasonic testing can be performed on manganese steel LNG storage tanks.

Second, the phased array ultrasonic flaw detection device is provided with a moving unit that can move along the screw guide by the rotation of the screw guide according to the driving of the motor, so that the probe can be stored even if the operator does not directly operate the phased array ultrasonic flaw detection device. When in contact with a tank, it automatically moves along a certain path and can perform phased array ultrasonic inspection. Therefore, consistency of test results can be ensured.

Third, vacuum leakage testing and phased array ultrasound testing can be performed more systematically by using the specific mark that the bottom of the vacuum box leaves on the surface of the storage tank as a reference, thereby ensuring the reliability of the test results.

1 is a perspective view of a non-destructive inspection system according to an embodiment of the present invention.
Figure 2 is a plan view of the non-destructive testing system shown in Figure 1;
Figure 3 is a rear view of the non-destructive testing system shown in Figure 1;
Figure 4 is a side view of the non-destructive testing system shown in Figure 1 viewed from direction A.
Figure 5 is a side view of the non-destructive testing system shown in Figure 1 viewed from direction B.
Figure 6 is a front view of the non-destructive testing system shown in Figure 1 viewed from direction C.
Figure 7 is a side view of a non-destructive inspection system according to another embodiment of the present invention.

Hereinafter, a non-destructive testing system capable of performing both a vacuum leak test and a phased array ultrasound test for a storage tank will be described in more detail with reference to the drawings.

In this specification, identical and similar reference numbers are assigned to identical and similar components even in different embodiments, and overlapping descriptions thereof are omitted.

In describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions will be omitted.

The attached drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings, and all changes, equivalents, and changes included in the spirit and technical scope of the present invention are not limited. It should be understood to include water or substitutes.

In the following description, singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Figure 1 is a perspective view of a non-destructive testing system 10 according to an embodiment of the present invention, Figure 2 is a front view of the non-destructive testing system 10 shown in Figure 1, and Figure 3 is a non-destructive testing system shown in Figure 1. This is the rear view of (10).

Referring to FIGS. 1 to 3 , the non-destructive testing system 10 according to an embodiment of the present invention includes a vacuum box 200 and a phased array ultrasonic flaw detection device 100.

That is, the non-destructive inspection system 10 has a structure in which a vacuum box 200 and a phased array ultrasonic flaw detection device 100 are integrated. Therefore, there is no need for the operator to separately equip the vacuum box 200 for vacuum leak testing and the phased array ultrasonic flaw detection device 100 for phased array ultrasonic testing, and vacuum leak testing and phased array ultrasonic testing can be performed in parallel. It is done so that it can be done. In other words, when using the non-destructive inspection system 10, an inspection is performed once to confirm the presence of cracks and internal discontinuity defects existing on the surface or weld joint of a storage tank (for example, a high manganese steel LNG storage tank). It can be done in

In addition, phased array ultrasonic inspection is usually performed continuously along the surface of the storage tank or weld joint, and for this purpose, the operator directly operates the phased array ultrasonic flaw detection device. Using the non-destructive inspection system 10, the probe When in contact with a storage tank, it automatically moves along a certain path and can perform ultrasonic inspection. Therefore, consistency of test results can be ensured.

Below, the vacuum box 200 and the phased array ultrasonic flaw detection device 100 that make up the non-destructive inspection system 10 will be described.

The vacuum box 200 is formed in the form of a box with one side open, and is arranged so that the open side covers the test surface of the storage tank during the vacuum leak test.

An edge portion 201 is formed to protrude along the edge of the vacuum box 200 so that the bottom surface of the vacuum box 200 can be brought into close contact with the test surface. The edge portion 201 is formed of a material such as rubber or urethane with a preset thickness.

For vacuum leakage testing, when the vacuum box 200 is arranged to cover the first area of the test surface on which the foaming liquid is applied, the edge portion 201 in strong contact with the test surface is attached to the first region. A mark of the corresponding shape is left. The marks are formed as a result of oxidation of the test surface.

Therefore, the operator uses the mark as a reference and moves the vacuum box 200 to the second area that overlaps a part of the first area so that the edge portion 201 overlaps a part of the mark to perform vacuum leakage inspection and phase array. By performing ultrasonic testing, non-destructive testing of storage tanks can be performed more systematically, thereby ensuring the reliability of testing results.

The vacuum box 200 includes a window 203, a pressure gauge 205, and an air outlet 206.

The window 203 is provided on the opposite side of the open side so that the test surface can be viewed when the vacuum box 200 is arranged to cover the test surface. That is, when the internal space limited by the vacuum box 200 and the test surface is depressurized to a vacuum or close to it, the operator can check whether bubbles are formed in the foam liquid applied to the test surface through the window.

The air discharge unit 206 is connected to a vacuum pump (not shown) to discharge air from the internal space. As air is discharged through the air discharge unit 206, the internal space becomes a vacuum state or is decompressed to a vacuum state. The air discharge unit 206 may be provided in the window 203 as shown.

The pressure gauge 205 is configured to measure the pressure of the internal space. The pressure gauge 205 may be provided in the air outlet 206 as shown.

The phased array ultrasonic flaw detection device 100 is designed to check the presence of cracks or internal discontinuity defects in the storage tank, especially in the weld joint area. When ultrasonic waves are propagated into a storage tank, the phased array ultrasonic flaw detection device 100 analyzes the amount of energy of the ultrasonic waves reflected from cracks or internal discontinuous defects existing inside the storage tank, the ultrasonic travel time, etc., and determines whether the defect occurred. This is done to accurately detect location and size.

For reference, a typical ultrasonic flaw detection device consists of one element and can only be used at one angle (for example, 45 degrees, 60 degrees, 70 degrees, etc.). A typical ultrasonic inspection device uses a single angle and cannot inspect the entire weld area with a fixed index, so inspection is performed by changing the probe.

However, the phased array ultrasonic flaw detection device 100 is composed of elements of 16 to 64 channels and forms a beam by adjusting the time delay of the transmission pulse and the reception echo. The phased array ultrasonic flaw detection device 100 has the advantage of being able to freely adjust the propagation direction and focal distance of ultrasonic waves, allowing defects to be detected by inspecting welded areas at various angles using only one probe with a fixed index.

The phased array ultrasonic flaw detection device 100 is coupled to the vacuum box 200 and includes a frame 110, a screw guide 120, a motor 130, a moving unit 140, and a probe coupling unit 150.

The frame 110 is coupled to the vacuum box 200 and has a hollow portion corresponding to the window 203. The frame 110 may be made of a metal material with sufficient strength, for example, aluminum, SUS, etc.

As shown, the frame 110 may include a plurality of frame bars 110a, 110b, 110c, and 110d disposed corresponding to each side of the upper surface of the vacuum box 200. The first frame bar 110a and the second frame bar 110b are arranged side by side with the screw guide 120 in between, and the third frame bar 110c is the first and second frame bars 110a and 110b. The fourth frame bar 110d is connected to the other end of the first and second frame bars 110a and 110b and is disposed to face the third frame bar 110c.

One end of the screw guide 120 is connected to the third frame bar 110c.

The first frame bar (110a), the second frame bar (110b), and the third frame bar (110c) have a first border surface (201a), a second border surface (201b) in the thickness direction of the vacuum box (200), and the third border surface 201c, respectively, and the fourth frame bar 110d is arranged outside the fourth border surface 201d, and the motor 130 is connected to the fourth frame bar 110d and the fourth frame bar 110d. It is located between the 4 border surfaces (201d).

The frame 110 may be coupled to the vacuum box 200 through the fastening portion 204. The fastening unit 204 may include brackets installed on the frame 110 and the vacuum box 200, respectively, and fastening members (bolts, nuts, etc.) for fastening the brackets.

In this embodiment, brackets are installed at one end and the other end of the first frame bar 110a, one end and the other end of the second frame bar 110b, and at positions corresponding to these in the vacuum box 200. It shows a structure in which the bracket is fastened by a fastening member.

Guide grooves 111 may be formed to extend on the inner and outer surfaces of the frame 110. In this embodiment, each frame bar (110a, 110b, 110c, 110d) is shown to be formed of an aluminum profile with a guide groove 111 extending on the slope.

The bracket may be configured to be movable along the guide groove 111, and may be firmly fixed at a preset position (position corresponding to the bracket installed in the vacuum box 200) by screwing or the like. According to the above structure, even if the frame 110 does not exactly match the circumference of the vacuum box 200, the frame 110 can be coupled to the vacuum box 200 by adjusting the position of the bracket.

The screw guide 120 is installed on the frame 110 to extend in one direction. In this drawing, the screw guide 120 is shown disposed within the hollow portion of the frame 110. Specifically, the screw guide 120 is rotatably installed on the third frame bar 110c, and is aligned with the first frame bar 110a and the second frame bar 110b toward the fourth frame bar 110d. It is extended.

The screw guide 120 is installed on the upper side of the window 203 at regular intervals from the window 203.

The motor 130 is connected to the screw guide 120 and is configured to rotate the screw guide 120 clockwise or counterclockwise. The motor 130 may be installed directly on the frame 110, or, as shown, may be mounted on a motor mounting frame 130a installed on the frame 110.

A fastening hole 131 is formed in the motor mounting frame 130a so that the fastening member can pass through and be fastened to the frame 110. The fastening hole 131 may be arranged to overlap the guide groove 111.

In this embodiment, the fastening hole 131 is shown to have a long hole shape extending perpendicularly to the guide groove 111. According to the above structure, the degree of freedom of installation of the motor mounting frame 130a can be increased.

The moving unit 140 is installed on the screw guide 120 and can move along the screw guide 120 by rotation of the screw guide 120 according to the driving of the motor 130.

The probe coupling unit 150 is coupled to the moving unit 140 so as to face the outer surface of the vacuum box 200 and moves with the moving unit 140, and the probe 154 in contact with the storage tank is detachably coupled. do. As the motor is driven, the probe 154 is formed to be able to move along the storage tank in one direction or the other from the outside of the vacuum box 200.

The non-destructive testing system may further include an encoder coupling unit 160. The encoder coupling unit 160 is coupled to the moving unit 140 to face the outer surface of the vacuum box 200 and is formed to move together with the moving unit 140. The encoder coupling unit 160 may be placed on the opposite side of the probe coupling unit 150 with the vacuum box 200 in between, as in one embodiment of the present invention, or may be coupled to the probe as in another embodiment of the present invention. Together with the unit 150, they may be placed at a certain interval on one side of the vacuum box 200.

Meanwhile, in this embodiment, the moving unit 140 includes a screw bearing 141 and a moving bar 142.

The screw bearing 141 is screwed to the screw guide 120. The screw guide 120 is formed to penetrate the screw bearing 141.

The screw bearing 141 is disposed in the hollow portion of the frame 110 to be spaced apart from the upper surface of the window 203.

The moving bar 142 is coupled to the screw bearing 141. The screw bearing 141 and the moving bar 142 may be coupled by a fastening bracket 141a.

The moving bar 142 is located on the screw guide 120 and is arranged perpendicular to the screw guide 120. The moving bar 142 is arranged perpendicularly on the first frame bar 110a and the second frame bar 110b arranged in parallel with the screw guide 120.

According to the above structure, the moving bar 142 is formed to move relative to the frame 110 (slide movement) by rotation of the screw guide 120 according to the driving of the motor 130. At this time, the probe coupling unit 150 is coupled to the moving bar 142 and moves together with the moving bar 142.

Guide grooves 142a may be formed to extend on the inner and outer surfaces of the moving bar 142. In this embodiment, the moving bar 142 is shown to be formed of an aluminum profile with a guide groove 142a extending on the slope.

The fastening bracket 141a fastened to the screw bearing 141 and the moving bar 142 may be configured to be movable along the guide groove 142a and may be firmly fixed at a preset position by screwing or the like.

The moving unit 140 may further include a connecting member 143 and at least one guide wheel 144 for more stable movement.

The connecting member 143 is coupled to the moving bar 142. In this drawing, the connecting member 143 is shown to be composed of a bracket and a slider 145. Specifically, sliders 145 are provided to cover the first frame bar 110a and the second frame bar 110b, respectively, and each slider 145 is integrated with the moving bar 142 through a bracket. It shows that they are combined.

The bracket may be configured to be fixable at any position of the guide groove 142a.

The slider 145 may be formed in a plate shape.

The guide wheel 144 is rotatably installed on the slider 145 so as to be in rolling contact with at least one of the inner and outer surfaces of the first and second frame bars 110a and 110b. In this embodiment, two guide wheels 144 are provided for each slider 145 so as to be in rolling contact with both sides of the first and second frame bars 110a and 110b, respectively.

At least a portion of the guide wheel 144 may be accommodated in the guide groove 111 extending along the longitudinal direction of the frame 110. In this case, the movement of the guide wheel 144 is guided by the guide groove 111, enabling more stable movement of the moving unit 140.

FIG. 4 is a side view of the non-destructive testing system shown in FIG. 1 viewed from direction A, FIG. 5 is a side view of the non-destructive testing system shown in FIG. 1 viewed from direction B, and FIG. 6 is a side view of the non-destructive testing system shown in FIG. 1. This is a front view seen from direction C.

Referring to FIGS. 4 to 6 , the probe coupling unit 150 includes a bracket, a first extension member 151, a second extension member 152, and a spring 153.

The bracket is coupled to the moving bar (142). The bracket may be configured to be fixable at any position of the guide groove 142a. The bracket may be provided with a curved groove 151a.

The first extension member 151 is coupled to the moving bar 142 and disposed to face the outer surface of the vacuum box 200, and extends downward toward the storage tank. In this drawing, the first extension member 151 is shown extending perpendicularly to the moving bar 142.

The first extension member 151 is formed to be fixable at a preset position in the groove 151a. Accordingly, the angle of the probe 154 relative to the storage tank or the distance between adjacent probes 154 can be easily adjusted.

The second extension member 152 is coupled to the first extension member 151 to enable relative movement. The probe 154 is detachably coupled to the second extension member 152. In this drawing, the second extension member 152 is shown to be arranged side by side with the first extension member 151 partially overlapping.

The spring 153 is connected to the first extension member 151 and the second extension member 152, respectively, and provides elastic force to press the probe 154 toward the storage tank. Accordingly, the probe can move while remaining in close contact even if the test surface is curved.

The encoder coupling unit 160 is coupled to the moving unit 140 so as to face the outer surface of the vacuum box 200 and moves together with the moving unit 140. The encoder coupling unit 160 is coupled to an encoder formed to detect the moving distance of the moving unit 140 by being in rolling contact with the storage tank.

The encoder coupling unit 160 includes a bracket, a first extension member 161, a second extension member 162, and a spring (not shown).

The bracket is coupled to the moving bar (142). The bracket may be configured to be fixable at any position of the guide groove 142a. The bracket may be provided with a straight groove 161a.

The first extension member 161 is coupled to the moving bar 142 and disposed to face the outer surface of the vacuum box 200, and extends downward toward the storage tank. In this drawing, the first extension member 161 is shown extending perpendicularly to the moving bar 142.

The first extension member 161 is formed to be fixable at a preset position in the groove 161a. Accordingly, the position of the wheel 164, which varies depending on the height of the vacuum box 200, can be appropriately adjusted.

The second extension member 162 is coupled to the first extension member 161 to enable relative movement. The encoder 165 and a wheel 164 in rolling contact with the test surface are detachably coupled to the second extension member 162. In this drawing, the second extension member 162 is shown to be partially overlapped with the first extension member 161.

The spring (not shown) is connected to the first extension member 161 and the second extension member 162, respectively, and provides elastic force to press the wheel 164 toward the storage tank. Accordingly, the wheel 164 can maintain rolling contact even if the test surface is curved.

Hereinafter, an inspection method using the non-destructive inspection system 10 of the present invention will be described.

First, a vacuum box 200 equipped with a window 203 through which bubbles can be checked is installed in the first area of the storage tank to perform a vacuum leak test (first step), and a phase coupled to the vacuum box 200 is performed. A phased array ultrasound inspection is performed on the vicinity of the first area using the array ultrasonic inspection device 100 (second step).

That is, in the first and second steps, a vacuum leak test for the first area and a phased array ultrasound test for the vicinity of the first area are performed.

At this time, after the second step, when the vacuum box 200 is separated from the storage tank, the edge portion 201 of the vacuum box 200, which was strongly adhered to the test surface, corresponds to the edge portion 201 in the first area. It leaves a mark in the shape of The marks are formed as a result of oxidation of the test surface.

Next, the vacuum box 200 is moved and installed to a second area partially overlapping with the first area to perform a vacuum leak test (step 3), and the phased array ultrasonic flaw detection device 100 is used to perform a vacuum leak test. Phased array ultrasound examination is performed around area 2 (step 4).

That is, in the third and fourth steps, a vacuum leak test for the second area and a phased array ultrasound test for the vicinity of the second area are performed.

At this time, in the third step, the vacuum box 200 is moved and installed in the second area so that the edge portion 201 of the vacuum box 200 overlaps a portion of the remaining mark.

In this way, by using the specific mark left on the surface of the storage tank by the edge portion 201 of the vacuum box 200 as a reference, vacuum leakage testing and phased array ultrasound testing can be performed more systematically. As a result, the reliability of the test results can be secured.

Below, modifications of the present invention will be described.

Figure 7 is a side view of a non-destructive inspection system according to another embodiment of the present invention.

Referring to FIG. 7, the probe coupling unit 1150 and the encoder coupling unit 1160 are connected to one side of the moving bar 1142 and are placed together on one side of the vacuum box 200.

The probe coupling unit 1150 includes a bracket, a first extension member 1151, a second extension member 1152, and a spring 1153, and the description of each component is replaced with the description of the previous embodiment.

The encoder coupling unit 1160 includes a bracket, a first extension member 1161, a second extension member 1162, and a spring (not shown), and the description of each component is replaced with the description of the previous embodiment.

The bracket of the probe coupling unit 1150 and the bracket of the encoder coupling unit 1160 are coupled together on one side of the moving bar 1142. These two brackets may be formed integrally.

Due to the above structure, the probe 1154 and the encoder (not shown) are arranged to be spaced apart from each other at a certain interval on one side of the vacuum box 200.

Claims (10)

A vacuum box formed to depressurize the interior for vacuum leak testing of the storage tank and provided with a window through which bubbles can be checked; and
It is coupled to the vacuum box and includes a phased array ultrasonic inspection device that performs phased array ultrasonic inspection of the storage tank,
The phased array ultrasonic flaw detection device,
a frame coupled to the vacuum box and having a hollow portion corresponding to the window;
A screw guide installed to extend in one direction on the frame;
a motor configured to rotate the screw guide clockwise or counterclockwise;
a moving unit installed on the screw guide and capable of moving along the screw guide by rotation of the screw guide according to driving of the motor; and
It is coupled to the moving unit to face the outer surface of the vacuum box and moves with the moving unit, and includes a probe coupling unit to which a probe in contact with the storage tank is detachably coupled,
According to the driving of the motor, the probe is formed to be movable on the storage tank in one direction or the other direction on the outside of the vacuum box, and performs both a vacuum leak test and a phased array ultrasonic test on the storage tank. Possible non-destructive testing system. According to paragraph 1,
The mobile unit is,
a screw bearing screwed to the screw guide; and
It is coupled to the screw bearing and includes a moving bar disposed perpendicular to the screw guide,
A non-destructive testing system capable of performing both a vacuum leak test and a phased array ultrasound test on a storage tank, wherein the probe coupling unit is coupled to the moving bar. According to paragraph 2,
The mobile unit is,
A connecting member coupled to the moving bar; and
A non-destructive testing system capable of performing both a vacuum leak test and a phased array ultrasonic test for a storage tank, further comprising at least one guide wheel coupled to the connecting member and in rolling contact with a side of the frame. According to paragraph 3,
The at least one guide wheel is disposed to face the inner and outer surfaces of the frame, respectively, and is in rolling contact with the inner and outer surfaces of the frame, respectively. Vacuum leakage test and phased array ultrasound for a storage tank A non-destructive inspection system that can perform inspection together. According to paragraph 4,
A non-destructive inspection system capable of performing both a vacuum leak test and a phased array ultrasonic test for a storage tank, characterized in that a guide groove accommodating at least a portion of the guide wheel is extended on the inner and outer surfaces of the frame. According to paragraph 2,
The probe binding unit is,
A bracket coupled to the moving bar;
a first extension member coupled to the bracket;
a second extension member coupled to the first extension member to be relatively movable and to which the probe is detachably coupled; and
A vacuum leak test and a phased array ultrasound test for a storage tank, characterized in that they include springs that are respectively connected to the first extension member and the second extension member and provide an elastic force to press the probe toward the storage tank. Non-destructive testing systems that can be performed together. According to clause 6,
The bracket is provided with a curved groove,
A non-destructive testing system capable of performing both a vacuum leak test and a phased array ultrasound test for a storage tank, wherein the first extension member is fixable at a preset position in the groove. According to paragraph 1,
An encoder coupling unit is coupled to the moving unit to face the outer surface of the vacuum box, moves together with the moving unit, and is coupled to an encoder formed to sense the moving distance of the moving unit by rolling contact with the storage tank. A non-destructive testing system capable of performing both a vacuum leak test and a phased array ultrasound test for a storage tank, comprising: A frame coupled to a vacuum box formed to depressurize the interior for vacuum leakage testing of the storage tank and having a hollow portion corresponding to a window of the vacuum box;
A screw guide installed to extend in one direction on the frame;
a motor configured to rotate the screw guide clockwise or counterclockwise;
a moving unit installed on the screw guide and capable of moving along the screw guide by rotation of the screw guide according to driving of the motor; and
It is coupled to the moving unit to face the outer surface of the vacuum box and moves with the moving unit, and includes a probe coupling unit to which a probe in contact with the storage tank is detachably coupled,
A phased array ultrasonic flaw detection device, wherein the probe is formed to be able to move along a storage tank in one direction or the other direction on the outside of the vacuum box according to the driving of the motor. A first step of performing a vacuum leak test by installing a vacuum box with a window through which bubbles can be checked in the first area of the storage tank;
A second step of performing ultrasonic inspection of the vicinity of the first area using a phased array ultrasonic inspection device coupled to the vacuum box;
A third step of performing a vacuum leak test by moving and installing the vacuum box to a second area partially overlapping the first area; and
A fourth step of performing phased array ultrasonic inspection of the vicinity of the second area using the phased array ultrasonic inspection device,
After the second step, a specific mark is left in the first area of the storage tank by the bottom surface of the vacuum box,
In the third step, a vacuum leak test and a phased array ultrasound test are performed on the storage tank, characterized in that the vacuum box is moved and installed in the second area so that the bottom surface of the vacuum box overlaps a portion of the remaining mark. Non-destructive testing methods that can be performed together.

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