KR20170036180A - Radiation non-destructive inspection apparatus - Google Patents

Abstract

A radiation nondestructive inspection apparatus is disclosed. A nondestructive inspection apparatus for a radiation according to the present invention remote-controls a driving unit to inspect an inspected object by irradiating a test region of the inspected object while moving the frame provided with the irradiating unit on the outer surface of the inspected object. Therefore, the inspection efficiency may be improved. The supporting bracket of the driving portion is installed so as to be movable in a seesaw-like shape with reference to the center portion side. Therefore, even when the rollers that are provided on both ends of the support bracket and move on the outer surface of the inspected object and pass through the portion where the radius of curvature of the inspected object changes are all passed through on the outer surface of the inspected object, .

Description

[0002] RADIATION NON-DESTRUCTIVE INSPECTION APPARATUS [0003]

The present invention relates to a radiation nondestructive inspection apparatus capable of firmly attaching to and moving on the outer surface of an inspected object having a change in radius of curvature.

In the industrial field, non-destructive inspection shall be carried out after welding to check whether there is any defect in the welded area without damaging the welded area. For example, a non-destructive inspection is carried out to check whether there is a defect in a welded portion of a pipe for transporting a fluid or a welded portion of a tank for storing a fluid.

Nondestructive tests include radiation penetration test, ultrasonic test, magnetic particle test, penetration test, eddy current test and leakage test. Radiation penetration test, which is relatively simple and accurate, is mainly used.

The non-destructive inspection using radiation transmits the radiation to the inspected object, and inspects the defects of the inspected object by regenerating the image formed on the film or the CRT from the transmitted radiation. Since radiation is harmful to the operator, exposure of the worker to the radiation emitted by the radiation nondestructive testing system may damage the worker's body.

Therefore, it is very important to protect the workers using the radiation nondestructive inspection apparatus, and accordingly, the related rules for providing a safe working environment have been strengthened.

Conventionally, a film is attached to a portion of an inspected object to be inspected at a predetermined interval, and then the operator fixes the nondestructive inspection apparatus at a first position of the inspected object to which the film is attached. Thereafter, the radiation nondestructive testing apparatus is remotely controlled to irradiate the first position of the inspected object with the radiation to take a picture.

When the photographing of the object to be inspected is completed, the radiation nondestructive inspection apparatus is safely moved so that the radiation is not leaked, and then the operator moves the radiation nondestructive inspection apparatus to the second position of the inspected object, which is the next inspection point, and fixes it. Thereafter, the nondestructive inspection apparatus is remotely controlled to radiate the radiation to the second position to take a picture.

The above operation is repeatedly performed to perform the inspection.

In the conventional radiation nondestructive inspection apparatus, when the worker is located at a sufficiently far distance from the inspected object while the radiation is being irradiated, and when the radiation is not irradiated and becomes a safe state in which the radiation is not leaked, . That is, since the radiation nondestructive testing apparatus must be manually moved and fixed, the inspection efficiency is deteriorated.

Further, when the portion of the object to be inspected to which the radiation nondestructive testing apparatus is fixed is a curved surface and the radius of curvature changes, it is difficult to securely fix the radiation nondestructive inspection apparatus to the object to be inspected.

It is an object of the present invention to provide a radiation nondestructive inspection apparatus capable of solving all the problems of the conventional art as described above.

It is another object of the present invention to provide a radiation nondestructive inspection apparatus capable of controlling the radiation nondestructive inspection apparatus to be remotely controlled to be movable on the inspected object, thereby improving inspection efficiency.

It is another object of the present invention to provide a radiation nondestructive inspection apparatus capable of firmly fixing and moving a radiation nondestructive inspection apparatus on the outer surface of an object having a continuously varying radius of curvature.

According to an aspect of the present invention, there is provided a radiation nondestructive inspection apparatus comprising: a frame; A driving unit installed on the frame and detachably attached to the inspected object and moving the frame linearly while driving on the inspected object by remote control or rotating the frame to change the direction; And a radiation source installed in the frame and having a radiation source for irradiating radiation to a region to be inspected of the inspected object by remote control, wherein the driving portion comprises a support having a center portion supported by the frame and movable in a seesaw- Brackets; And a roller which is rotatably and counterclockwise rotatably mounted on both ends of the support bracket and which is detachable from and rotates on the inspected object.

A radiation nondestructive testing apparatus according to an embodiment of the present invention remote-controls a driving unit to inspect an inspected object by irradiating a test site of the inspected object while moving a frame provided with the irradiating unit on the outer surface of the inspected object. Therefore, the inspection efficiency may be improved.

The supporting bracket of the driving portion is installed so as to be movable in a seesaw-like shape with reference to the center portion side. Therefore, even when the rollers that are provided on both ends of the support bracket and move on the outer surface of the inspected object and pass through the portion having the change of the radius of curvature of the inspected object are all attached to the outer surface of the inspected object, .

1 is a perspective view of a radiation nondestructive inspection apparatus according to an embodiment of the present invention;
2 is an exploded perspective view of the driving unit shown in Fig.
Figure 3a is a side view of Figure 1;
FIG. 3B is a side view showing a state in which the irradiation unit shown in FIG. 3A is lowered. FIG.
FIG. 4A is a side view of a support bracket and a roller showing operation of a driving unit of a radiation nondestructive test apparatus according to an embodiment of the present invention; FIG.
4B is a view showing the operation of a driving unit of a conventional radiation nondestructive test apparatus.

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.

Meanwhile, the meaning of the terms described in the present specification should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms.

It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, Means any combination of items that can be presented from more than one.

The term "above" means not only when a configuration is formed directly on top of another configuration, but also when a third configuration is interposed between these configurations.

Hereinafter, a radiation nondestructive inspection apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a radiation nondestructive testing apparatus according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the driving unit shown in FIG. 1, FIG. 3a is a side view of FIG. 1, And a side view showing a state in which the irradiation part is lowered.

As shown in the figure, the apparatus for measuring non-destructive testing according to the present embodiment may include a frame 110, a driving unit 130, and a radiation irradiating unit 150.

The radiation nondestructive testing apparatus according to the present embodiment irradiates a region to be inspected of the inspected object 50 (see FIG. 4) to be inspected and inspects whether or not a defect exists in the inspected region of the inspected object 50 . At this time, the inspected object 50 may be a tank of a metal material in which fluids such as LPG (Liquefied Petroleum Gas) are stored, and the inspection site of the inspected object 50 to be inspected may be welded have.

The frame 110 may be formed in a substantially rectangular shape.

The driving unit 130 is installed on the lower surface of the frame 110 and can be attached to and detached from the inspected object 50 made of metal and attached to the outer surface of the inspected object 50 to be driven on the outer surface of the inspected object 50 have. The driving unit 130 may be connected to the control unit (not shown) in a wireless or wired manner, and may be remotely controlled by the control unit.

By driving the driving unit 130, the frame 110 can move in a straight line, or can change its direction while rotating.

The driving unit 130 may include a first driving unit 130a to a fourth driving unit 130d which are independently provided at the corner of the frame 110 and are operated by remote control of the control unit 130 . Thus, when all of the first to fourth driving units 130a to 130d are driven, the frame 110 can move linearly. If any one of the first to third driving units 130a to 130d is stopped and is fixed to the inspected object and is appropriately selected to be driven, the frame 110 can be turned and rotated .

The first driving unit 130a to the fourth driving unit 130d may include a support bracket 131, a mag switch 133, and a roller 135, respectively.

The support bracket 131 may be installed such that the center portion thereof is supported by the frame 110 and is movable in a seesaw form. The operation of the support bracket 131 will be described later.

The mag switch 133 may be provided at both ends of the support bracket 131 and may include a permanent magnet 133a and a lever (not shown). Thus, the magnetic force of the permanent magnet 133a can be turned on or off by rotating the lever in normal and reverse directions.

The roller 135 may be installed on the side of the permanent magnet 133a of the mag switch 133 so as to be rotatable in the forward and reverse directions and may be magnetized when the magnetic force of the permanent magnet 133a is turned on, ) Is turned off, it can be non-registered. Thus, when the roller 135 is magnetized, it can be attached to the inspected object 50, and if the roller 135 is non-magnetized, it can be detached from the inspected object 50. [ The roller 135 can be rotated on the inspected object 50 by remote control of the control unit in a state of being attached to the inspected object 50. [

The permanent magnet 133a of the mag switch 133 has a strong magnetic force. The roller 135 attached to the inspected object 50 does not fall off from the inspected object 50 due to the magnetic force of the permanent magnet 133a and the magnetic force of the roller 135, It can rotate in the forward and reverse directions.

A drive gear 137a can be rotatably mounted on the center of the support bracket 131 and the drive gear 137a can be rotated by the rotation shaft 138a of the motor 138. [

A driven gear 137b may be provided on both ends of the support bracket 131 so as to be rotatable in both forward and reverse directions. And the driven gear 137b can rotate the roller 135. [ The driven gear 137b can be in contact with the both end sides of the chain 139 forming the closed loop, and can be interconnected by the chain 139 and interlocked. Then, the drive gear 137a can be circumscribed with the chain 139.

Thus, the rotating force of the rotating shaft 138a is transmitted to the driven gear 137b through the driving gear 137a → chain 139, and the driven gear 137b can rotate the roller 135. [

The radiation nondestructive testing apparatus according to the present embodiment can be stopped while being substantially perpendicular to the floor while moving on the outer surface of the inspected object 50. [ At this time, when the roller 135 is rotated in the reverse direction, the radiation nondestructive testing apparatus according to the present embodiment can be slid to the lower side of the inspected object 50.

In order to prevent the radiation nondestructive testing apparatus according to the present embodiment from sliding downward on the outer surface of the inspected object 50, the motor 138 may stop when the radiation nondestructive testing apparatus according to the present embodiment is stopped. Then, since the rotating shaft 138a and the driving gear 137a are not rotated, neither the chain 139 nor the driven gear 137b rotates. Therefore, since the reverse rotation of the roller 135 is prevented, the radiation nondestructive inspection apparatus according to the present embodiment can be prevented from sliding on the outer surface of the inspected object 50. [

A motor 138 having a rotation shaft 138a for rotating the roller 135, a drive gear 137a connected to the rotation shaft 138a, a chain 139 contacting with the drive gear 137a, The driven gear 137b which is in contact with the chain 137 on the side of the roller 135 can also function as a reverse rotation prevention module for preventing the roller 135 from being reversely rotated.

The irradiation unit 150 includes a radiation source that generates radiation, and may be installed in the frame 110. The radiation irradiation unit 150 can irradiate the welding portion of the inspection object 50 with the radiation by remote control of the control unit. When the radiation irradiated from the irradiation part 150 passes through the welding part of the inspected object 50, an image is formed on the film or the CRT, and the image formed on the film or the CRT is reproduced, Lt; / RTI >

One end of the support member 140 may be supported on the frame 110 and the support member 140 may be rotatably mounted on the frame 110. A radiation irradiating unit 150 may be detachably attached to the other end of the support member 140.

When irradiating the welded portion of the inspected object 50 in the irradiation unit 150, the other end of the supporting member 140 is separated from the frame 110, and the frame 110 is moved or rotated The other end of the support member 140 is positioned close to the frame 110. In this case,

A stopper 143 may be provided on the other end of the support member 140 to prevent the radiation of the irradiation unit 150 installed at the other end of the support member 140 from flowing. The one end side of the stopper 143 may protrude toward the radiation irradiation part 150 and be inserted into a support groove (not shown) formed in the radiation irradiation part 150. The stopper 143 can be elastically supported by an elastic member (not shown) and can be inserted into the support groove. When the stopper 143 is pulled toward the one end side of the support member 140, one end side of the stopper 143 can be pulled out of the support groove.

The support member 140 may be rotated by a cylinder 160 having a piston 161 and the cylinder 160 may be installed on the frame 110. The cylinder 160 may support the rotated support member 140.

A camera (not shown), a laser pointer 170, and a lighting device (not shown) may be installed on the other end of the support member 140.

The camera can take a picture of the welded part of the inspected object 50 and the laser pointer 170 can indicate the welded part of the inspected object 50. [ Whether the region indicated by the laser pointer 170 is an accurate region of the inspected object 50 to be inspected can be confirmed through the camera.

A plurality of rings 112 may be formed in the frame 110 of the apparatus for testing nondisruption of radiation according to the present embodiment. A support rope (not shown) may be inserted into the loop 112, and the support rope may be installed to surround the outer surface of the inspected object 50 so that both ends can be connected to each other. Then, the roller 135 attached to the inspected object 50 can be further prevented from being detached from the inspected object 50. [

The support bracket 131 described above, which is provided movably in a seesaw form, will be described with reference to Figs. 4A and 4B. FIG. 4A is a side view of a supporting bracket and a roller showing the operation of a driving unit of the apparatus for testing a radiation nondestructive testing apparatus according to an embodiment of the present invention, and FIG. 4B is a view showing the operation of a driving unit of a conventional radiation nondestructive testing apparatus.

As shown in the figure, the outer surface of the inspected object 50 such as an LPG tank or the like may have a continuously varying radius of curvature, and the radiation nondestructive inspection apparatus according to the present embodiment may include a portion having a change in radius of curvature of the inspected object 50 It can pass.

4A, since the support bracket 131 is installed movably in a seesaw-like shape with respect to the center of the support bracket 131, the radiation nondestructive inspection apparatus according to the present embodiment has the support bracket 131, The rollers 135 can be attached to the outer surface of the inspected object 50 and pass therethrough when the rollers 135 provided respectively pass through the portion where the radius of curvature of the inspected object 50 changes.

4B, when the roller 83 is provided on the frame 80, the roller 83 passing through the portion where the radius of curvature of the inspected object 50 is changed instantaneously moves the inspected object 50 ), And therefore is relatively less stable.

The lower surface of the support bracket 130 facing the inspected object 50 is formed as a curved surface depressed upward and an outer surface with a change in the radius of curvature of the inspected object 50 and the lower surface of the support bracket 130 It is possible to prevent contact.

The apparatus for radial nondestructive testing according to the present embodiment attaches the film to the inner circumferential surface of the welded portion of the inspected object 50 at a predetermined interval and then magnetizes the roller 135 of the driving unit 130 to rotate the roller 135 against the inspected object 50 ). The frame 110 is also attached to the side of the inspected object 50 by the magnetic force of the permanent magnet 133a of the magnet switch 133. [

Thereafter, the driving unit 130 is remotely controlled to move the frame 110 so that the radiation irradiating unit 150 is positioned at the first position of the inspected object 50, and then the radiation is irradiated to the first Investigate into position and take a picture. The radiation irradiating unit 150 is remotely controlled so that the radiation is not irradiated and the driving unit 130 is remotely controlled so that the radiation irradiating unit 150 is positioned at the second position of the inspected object 50 After the frame 110 is moved, the radiation is irradiated to the second position of the inspected object 50 to take a picture. At this time, during the movement of the frame 110, the support member 140 may be rotated so that the irradiation unit 150 is adjacent to the frame 110 side. Since the above-described operation is repeatedly performed to perform the inspection, the inspection efficiency can be improved.

The support bracket 131 is installed so as to be movable in a seesaw form with reference to the center side. Even when the roller 135, which is provided on both end sides of the support bracket 131 and moves on the outer surface of the inspected object 50 while rotating, passes through a portion where the radius of curvature of the inspected object 50 is changed, 50 so that they are stable.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of. Therefore, the scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention.

110: frame
130:
131: support bracket
133: Mag switch
135: Roller
140: support member
150:

Claims (6)

frame;
A driving unit installed on the frame and detachably attached to the inspected object and moving the frame linearly while driving on the inspected object by remote control or rotating the frame to change the direction;
And a radiation irradiating unit installed in the frame and having a radiation source for irradiating the inspection site of the inspected object with the remote control by the remote control,
The driving unit includes:
A supporting bracket supported on the frame at a central portion thereof and movably installed in a seesaw form;
And a roller which is rotatably and counterclockwise rotatably mounted on both end portions of the support bracket and which is detachably attached to the object to be inspected and which is rotated on the object to be inspected. The method according to claim 1,
The driving unit may include a first driving unit to a fourth driving unit provided on the corner of the frame,
Wherein the first driving unit to the fourth driving unit include rollers provided respectively at both end portions of the support bracket and the support bracket,
The rollers provided on both end portions of the support bracket interlock with each other,
Wherein the support bracket is provided with a reverse rotation prevention module for preventing reverse rotation of the roller. 3. The method of claim 2,
The inspection object is formed of a metallic material,
The first driving unit to the fourth driving unit may further include a mag switch installed on both end sides of the support bracket to turn the magnetic force on or off,
Characterized in that the roller is rotatably mounted on the mag switch and is magnetized or non-magnetized as the mag switch is turned on or off so as to be attached to and detached from the inspected object and rotated on the inspected object by remote control Device. The method according to claim 2 or 3,
Wherein the first driving unit to the fourth driving unit are controlled independently of each other. The method according to claim 1,
Wherein one end of the support member is supported on the frame and is rotatably installed,
And the radiation irradiation part is supported on the other end side of the supporting member,
Wherein the frame is provided with a cylinder for rotating the support member or supporting the rotated support member,
And a stopper for preventing the flow of the irradiation part is provided on the other end side of the supporting member. The method according to claim 1,
Wherein a ring is formed in the frame to which the support rope is inserted to prevent the roller attached to the inspected object from being detached from the inspected object.

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