WO2016163577A1

WO2016163577A1 - Fixing tool for nondestructive testing and nondestructive testing equipment using same

Info

Publication number: WO2016163577A1
Application number: PCT/KR2015/003948
Authority: WO
Inventors: 조현상
Original assignee: 앤스코 주식회사
Priority date: 2015-04-10
Filing date: 2015-04-21
Publication date: 2016-10-13
Also published as: KR101549828B1

Abstract

The present invention relates to a fixing tool for nondestructive testing and nondestructive testing equipment using the same and, more specifically, relates to a fixing tool for nondestructive testing, wherein one pair of pressing members for fixing probes used for the nondestructive testing of various objects to be tested have the same displacement and press the probes such that probes having various sizes and shapes can be applied by means of the single fixing tool for nondestructive testing, thereby increasing work convenience of an inspector, and when applying a TOFD technique, the centers of one pair of probes can be positioned on the same line so as to derive testing results having high reliability.

Description

Non-destructive testing fixtures and non-destructive testing equipment using the same

The present invention relates to a non-destructive testing fixture and non-destructive testing equipment using the same, more specifically, non-destructive testing fixture jig that can be coupled to the probe wedges of different sizes made to be applied to various types of specimens. And it relates to a non-destructive inspection equipment using the same.

In general, the non-destructive testing fixture used for ultrasonic flaw detection is a probe that generates ultrasonic waves and transmits them to the specimen, receives ultrasonic waves reflected from the reflection source of the specimen, converts them into electrical signals, and combines them with the probe. It consists of a wedge for arbitrarily changing the angle of refraction of the beam emitted from the transducer by adjusting the angle at which the probe emits a beam in the pipe and a fixture for fixing it.The transducer has various shapes and sizes depending on the size and shape of the specimen. Several kinds of fixtures have been used for the purpose.

However, the conventional fixtures as described above has the disadvantage of applying different fixtures in order to inspect pipes and various specimens widely distributed in nuclear power plants and plant sites, and have various kinds of fixtures in the field inspection. As a result, work convenience and efficiency decreased.

Figure 1 shows a conventional non-destructive inspection fixture jig with the above problems.

Referring to Figure 1, the conventional non-destructive inspection jig is a scan body for installing a transducer such as an ultrasonic sensor, the first link spreads in both the wings in the hinge axis of the scan body and rotatably connected; A detachable link detachably coupled to a hinge shaft of the first link, and a plurality of repeating links may be repeatedly connected, an end link detachably connected to a hinge axis of the detachable link, and a hinge shaft of the end link. And fastening means for connecting, fastening, and tightening each other, and a roller rotatably installed on the scan body, the first link, and the end link.

At this time, the conventional non-destructive inspection jig has a structure in which the scan body to which the probe is fixed is formed in a constant size and the wedge combined with the probe having various sizes and the probe cannot be applied.

Therefore, the conventional non-destructive testing fixtures have to be made of various kinds of fixtures to apply different probes and wedges to correspond to the shape of each specimen, so unnecessary resources were wasted. In order to perform non-destructive inspection on the pipe, it is undeniable that the work convenience and efficiency are inferior because a number of fixtures must be provided.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) Korean Patent Publication No. 2008-0024570

The present invention has been made to solve the above problems, an object of the present invention, consisting of a structure that can be fixed wedge coupled to the probe of various sizes to a single non-destructive inspection fixture, the pipe to a single fixture By enabling inspection of various types of specimens, it minimizes the production cost of fixtures, which had to be manufactured differently according to the inspection environment, and improves the method of fixing the transducer wedges to the fixtures, thereby maximizing the working efficiency and convenience of inspectors. It is to provide a non-destructive inspection fixture for improving the reliability of the inspection results.

Non-destructive inspection jig for achieving the object as described above, the body 100 is formed with a sliding bar 110 penetrating both the left and right sides in one longitudinal direction; The left and right sides of the body 100 are coupled to the other side in the longitudinal direction of the sliding bar 110, the pair of sliding arms 210 to move left and right in the inner direction facing each other riding the sliding bar 110, respectively. And a pressing part 200 formed of a pressing member 220 protruding in an inner direction facing each other at one end of the pair of sliding arms 210 in the longitudinal direction; And a rotation lever 310 having a rotation shaft formed at left and right centers of the body 100 and one side connected to each of the sliding arms 210, and the other side symmetrically coupled to an edge of the rotation lever 310. It characterized in that it comprises a; control unit 300 composed of a pair of joints (320).

In addition, the non-destructive inspection fixture jig is further provided with a first coupling member 330 penetrating the joint 320 and the rotary lever 310 in the vertical direction, the body 100 is the upper side A guide groove 120 is formed in which the lower end of the first coupling member 330 is inserted and slides, and the first coupling member 330 corresponds to the rotational movement of the rotary lever 310. It characterized in that for moving the joint 320 along.

In addition, the non-destructive inspection fixture jig, the guide groove 120 is moved back and forth with respect to the rotation axis so that the separation distance of the sliding arm 210 is constantly changed corresponding to the rotation angle of the rotary lever 310. It is characterized by consisting of a symmetrical arc line shape.

In addition, the non-destructive inspection jig is characterized in that the joint 320 is bent elbow shape.

In addition, the non-destructive inspection fixture is characterized in that the guide groove 120 and the joint 320 is formed in a pair corresponding to each other.

In addition, the pressing unit 200, the pressing member 220 and the sliding arm 210 is moved up and down in response to the force generated by the contact between the probe and the test body fixed to the pair of the pressing member 220 It characterized in that connected to the singular or plural linear bushing 230.

In addition, the non-destructive inspection fixture is characterized in that the pair of support portions 130 in contact with the pipe on the other side in the longitudinal direction of the body 100 is formed symmetrically.

In the non-destructive inspection equipment using the non-destructive inspection fixture of the present invention for achieving the object as described above, the non-destructive inspection equipment, the two non-destructive inspection fixture jig fixedly coupled to the connection frame 140, the same Characterized in that spaced apart from each other on the line.

The non-destructive inspection fixture of the present invention by the above configuration is formed to be fixed to the probe and the wedge having a variety of sizes and shapes, to minimize the equipment to be transported during non-destructive inspection of pipes and specimens located at various coordinates This has the advantage of improving the convenience of non-destructive inspection.

In addition, a pair of pressing members for pressing and fixing the transducer or the wedge from the left and right are combined with the same control unit and move with the same displacement, thereby fixing the transducer or the wedge accurately in the left and right centers of the non-destructive inspection fixture. Has the effect of improving.

In addition, the non-destructive inspection equipment using the non-destructive inspection fixture, the left and right centers of the transducer and the wedge fixed to each non-destructive inspection fixture is located on the same line, and the two left and right centers of the probe are placed on the same line for inspection When the time of flight diffraction (TOFD) technique is applied, it is possible to obtain reliable inspection results.

1 is a perspective view showing a conventional fixture.

Figure 2 is a perspective view showing a fixture for nondestructive inspection.

Figure 3 is a perspective view of the non-destructive testing equipment using a non-destructive testing fixture.

Figure 4 is a plan view showing a non-destructive inspection fixture and non-destructive inspection equipment using the same.

Figure 5 is a side view showing a non-destructive inspection fixture and non-destructive testing equipment using the same.

Figure 6 is a side view showing the non-destructive testing equipment using a fixture for non-destructive testing.

7 is a conceptual diagram showing the movement of the wavelength in the TOFD technique using non-destructive testing equipment.

Figure 8 is a side view showing a non-destructive inspection fixture jig (when pipe coupling).

9 is a conceptual diagram showing the movement of the wavelength in the universal automatic ultrasonic flaw detection method using a non-destructive test fixture.

Hereinafter, the non-destructive inspection fixture and the non-destructive inspection equipment using the same according to the present invention will be described in detail with reference to the drawings.

2, the whole perspective view of the fixture for nondestructive inspection of this invention is shown.

Referring to Figure 2, the non-destructive inspection fixture of the present invention is a body 100 and a sliding bar 110 is formed on each side of the left and right through the left and right sides in one longitudinal direction, respectively disposed on the left and right of the body 100 in the longitudinal direction The other side is coupled to the sliding bar 110, the pair of sliding arms 210 and the left and right movements in the inner direction facing each other riding the sliding bar 110, and the pair of the sliding arms 210 Compression part 200 consisting of a pressing member 220 protruding in the inner direction facing each other at one end in the longitudinal direction, the rotary lever 310 is formed in the left and right center of the body 100 and the longitudinal direction One side is connected to each of the sliding arms 210, and the other end in the longitudinal direction is formed to include a control unit 300 consisting of a pair of joints 320 symmetrically coupled to the edge of the rotary lever (310).

That is, the rotational force generated when the rotary lever 310 is rotated is transmitted to the sliding arm 210 so that the pair of sliding arms 210 move left and right by sliding the sliding bar 110, so that the pair of sliding arms face each other. It is to fix the wedge is coupled between the transducer or the transducer located between the 210.

At this time, the non-destructive inspection fixture of the present invention, the body 100 and the pressing unit 200, and the control unit 300 in order to make a fixed position of the transducer fixed to the pair of the pressing member 220 is always fixed. Are organically coupled to each other, and the coupling structure will be described below with reference to the non-destructive inspection equipment using the non-destructive inspection fixture.

In FIG. 3, the perspective view of the nondestructive inspection equipment using the non-destructive inspection fixture of this invention is shown.

Referring to FIG. 3, the non-destructive inspection equipment includes a pair of the non-destructive inspection fixtures connected to each other as a connection frame 140 so as to be suitable for the Time of Flight Diffraction Technique (TOFD) technique illustrated in FIGS. 6 and 7. Are symmetrically coupled. In detail, the TOFD technique during the ultrasonic nondestructive testing is a method of measuring the height of a defect using diffraction ultrasonic waves at the end of the defect. The longitudinal wave inclination transducer for transmission and reception is placed on the surface of the specimen with the defect therebetween, and the ultrasonic wave is transmitted. By using diffraction ultrasonic waves diffracted at the upper and lower ends of the defective defects in addition to the wave propagating the surface and the bottom reflection wave, the height of the defect is obtained from the arrival time of the upper diffraction ultrasonic wave, the arrival time of the lower diffraction ultrasonic wave and the distance between the probe. Way.

Therefore, in order to use the TOFD technique, the transmitting transducer and the receiving transducer should be positioned exactly on the same line to minimize noise or error value in the signal generated between the pair of transducers.

As a result, the present inventors in the non-destructive inspection equipment, the pair of transducers are not located on the same line as described above to solve the noise and error occurs, the reliability of the experimental results are lowered, the pair of joints 320 is rotated It is symmetrically coupled to the edge of the lever 310, in response to the rotational movement of the rotary lever 310 is made of a structure in which the pressing unit 200 moves left and right in the inner direction facing each other riding the sliding bar 110.

That is, the non-destructive inspection equipment of the present invention, by connecting the body 100, the pressing unit 200, and the control unit organically to each other, the rotation lever (shaft formed in the left and right center of the body 100) The rotational force generated at 310 is equally transmitted to each sliding arm 210.

Referring to FIG. 4, the non-destructive inspection fixing jig constituting the non-destructive inspection device further includes a first coupling member 330 penetrating the joint 320 and the rotary lever 310 in the vertical direction. The lower end of the first coupling member 330 is inserted into the upper portion of the body 100 to guide the sliding groove 120 is formed, the first coupling member 330 is the rotary lever 310 The joint 320 is moved along the guide groove 120 in response to the rotational movement of the joint.

At this time, when the rotary lever 310 and the sliding arm 210 is connected through only the joint 320, according to the coupling degree of each coupling portion of the rotary lever 310, the sliding arm 210 and the joint 320. Since the force transmitted from the rotary lever 310 may not be constant, in order to prevent the above situation, the first coupling member 330 is inserted into the upper portion of the body 100 to guide the sliding groove 120. This is to be formed.

In addition, the non-destructive inspection fixture and non-destructive inspection equipment is made of a shape in which the joint 320 is bent, preventing the phenomenon that the rotary shaft of the rotary lever 310 and the joint 320 hit the rotary lever 310 By widening the rotation angle of the maximum, it is recommended to maximize the radius of motion of the pair of pressing members 220.

Referring to Figures 2 to 4, when the pair of the joint 320 is formed so that there is no bending, the separation distance of the pair of the pressing member 220 by the rotation of the rotary lever 310 is narrow Since the joint 320 hits the rotary shaft of the rotary lever 310, the rotary radius of the rotary lever 310 is limited.

That is, as the radius of rotation of the rotary lever 310 is limited, the radius of motion of the pair of pressing members 220 sliding left and right on the sliding bar 110 by receiving the rotational motion force of the rotary lever 310. This reduction is to limit the size of the wedge coupled to the transducer or the transducer that can be fixed to the pressing member 220.

Therefore, when the joint 320 is formed to be bent and the separation distance of the pressing member 220 is narrowed, the rotation axis of the rotary lever 310 is formed in a space formed between the bent portions of the pair of joints 320. By positioning, the rotation axis of the rotary lever 310 and the joint 320 is in contact with each other to prevent the rotation radius of the rotary lever 310 to be reduced, between the pressing member 220 or more various shapes or transducers of various sizes or The transducer can fix the wedge to which it is coupled.

At this time, the curved shape of the joint 320 may be a variety of structures, such as a triangular structure, the arc-shaped structure, the one side is opened, the pentagonal structure opened on one side, between the pair of the joint 320 facing each other Since the space where the rotary lever 310 can be located is formed in the formed space, it is not limited.

In addition, the non-destructive inspection fixture and the non-destructive inspection equipment has the arc shape of the guide groove 120 is formed symmetrically around the axis of rotation of the rotary lever 310, the joint 320 is the guide groove 120 It is recommended that the movement distance of the sliding arm 210 is constantly changed to correspond to the rotational angle of the rotary lever 310, which is formed in a curved shape corresponding to

In detail, when the joint 320 is formed in a straight line without bending, a line connecting a connection point between the rotary lever 310 that rotates and the joints 320 and the sliding arm 210 are connected to each other. According to the angle formed by the line connecting the sliding bar 110 to move left and right, even if the rotary lever 310 is rotated at a predetermined angle, the distance that the sliding arm 210 moves.

Therefore, the guide groove 120 is configured in a line shape formed symmetrically around the rotation axis of the rotary lever 310, the joint 320 connecting the rotary lever 310 and the sliding arm 210 It is formed to have a curve corresponding to the guide groove 120, so that the sliding arm 210 moves the sliding bar 110 at a constant rate corresponding to the rotation angle of the rotary lever 310.

In addition, the non-destructive inspection fixture of the present invention and the non-destructive inspection equipment using the same, a pair of support portions 130 in contact with the pipe on the other side in the longitudinal direction of the body 100 may be formed symmetrically.

Referring to FIG. 5, the non-destructive inspection fixture is positioned such that a straight line passing through the left and right centers of the probe fixed by the pressing member 220 passes through the diameter of the pipe using the support 130. As a result, when the left and right centers of the transducer do not contact the pipe, the ultrasonic wave emitted from the transducer may not be accurately incident on the pipe, so an error may occur in the measured value, thereby lowering reliability. It is arranged so that the contact surface between the transducer and the pipe does not shift.

In addition, the present invention non-destructive inspection fixture and non-destructive testing equipment using the same is formed so that the pressing member 220 can move up and down in response to the force applied from the outside in the support 130 and the body 100 By pressing the compression frame 150 formed to extend upward, it is possible to eliminate the gap that may occur between the specimen and the probe.

Referring to FIG. 2, the pressing unit 200 is a force generated when the pressing member 220 and the sliding arm 210 are in contact with a probe fixed to the pair of pressing members 220 and the test object. Corresponding to the singular or plural linear bushings 230 to move up and down.

In this case, the linear bushing 230 is a housing 231 coupled to one end portion of the sliding arm 210 in the longitudinal direction, and a pair of linear guides 232 penetrating through the housing 231 in the vertical direction. And a pair of linear frames 233 coupled to a central axis of the linear guide 232 to move upward and downward, but having a lower end coupled to the pressing member 220, and an upper outer peripheral surface of the linear frame 233. O-ring 224 and protrudingly formed to prevent the linear frame 233 from escaping from the linear guide 232 and the outer circumferential surface of the linear frame 233, the upper end of the lower end of the housing 231 It is configured to include a spring 235 in contact with the lower end is in contact with the upper surface of the pressing member (220).

That is, the pressing unit 200 is fixed to the wedge coupled to the transducer or the probe located between the pressing member 220 with the force transmitted from the sliding arm 210, the transducer fixed to the pressing member 220 Alternatively, when the lower surface of the wedge combined with the probe is not in close contact with the surface of the test object, the compression frame 150 or the connecting frame 140 is pressed to each of the linear frames 233 to the surface shape of the test object. Correspondingly, the height is deformed to bring the probe or the wedge to which the probe is coupled to closely contact the test object.

In addition, the non-destructive inspection fixture of the present invention, as shown in Figures 8 and 9 it is possible to perform a non-destructive inspection with only one probe.

The technical spirit should not be interpreted as being limited to the above embodiments of the present invention. Various modifications may be made at the level of those skilled in the art without departing from the spirit of the invention as claimed in the claims. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

[Description of the code]

100: body 110: sliding bar

120: guide groove 130: support portion

140: connection frame

200: pressing portion 210: sliding arm

220: pressing member 230: linear bushing

231 housing 232 linear guide

233: linear shaft 234: O-ring

235: spring

300: control unit 310: rotation lever

320: joint 330: first coupling member

Claims

In the non-destructive inspection fixture for fixing the transducer used for non-destructive inspection of various test objects,

A body 100 having a sliding bar 110 penetrating both left and right sides in one longitudinal direction thereof;

The left and right sides of the body 100 are coupled to the other side in the longitudinal direction of the sliding bar 110, the pair of sliding arms 210 to move left and right in the inner direction facing each other riding the sliding bar 110, respectively. And a pressing part 200 formed of a pressing member 220 protruding in an inner direction facing each other at one end of the pair of sliding arms 210 in the longitudinal direction; And

A pair of rotary levers 310 having a rotating shaft formed at the left and right centers of the body 100 and one side connected to each of the sliding arms 210 and the other side symmetrically coupled to an edge of the rotary lever 310. The control unit 300 is composed of a joint 320; characterized in that it comprises a non-destructive inspection fixture.
According to claim 1, wherein the non-destructive inspection fixture,

A first coupling member 330 is further provided to penetrate the joint 320 and the rotary lever 310 in the vertical direction.

The body 100 is formed with a guide groove 120 for sliding the lower end of the first coupling member 330 is inserted into the upper side,

The first coupling member 330 is fixed to the non-destructive inspection, characterized in that for moving the joint 320 along the guide groove 120 in response to the rotational movement of the rotary lever (310).
According to claim 2, The non-destructive inspection fixture is,

The guide groove 120 is formed in a line shape symmetrical with respect to the rotation axis so that the separation distance of the sliding arm 210 is constantly changed corresponding to the rotation angle of the rotary lever 310. Fixture for nondestructive testing.
According to any one of claims 1 to 3, wherein the non-destructive inspection fixture,

Fixed joint for non-destructive inspection, characterized in that the joint 320 is curved.
According to claim 4, The non-destructive inspection jig,

The guide groove 120 and the joint 320 is characterized in that the pair consisting of a pair, non-destructive inspection fixture.
The method of claim 1, wherein the pressing unit 200,

Single or plural linear bushings 230 in which the pressing member 220 and the sliding arm 210 vertically move in response to a force generated by contact between the probe and the test object fixed to the pair of pressing members 220. Fixed jig for non-destructive inspection, characterized in that connected to.
According to claim 6, The non-destructive inspection fixture jig,

Non-destructive inspection fixture jig, characterized in that the pair of support parts 130 in contact with the pipe on the other side in the longitudinal direction of the body 100 is formed symmetrically.
In the non-destructive inspection equipment using the non-destructive inspection fixed jig according to claim 1,

The non-destructive inspection equipment, the two non-destructive inspection fixtures are fixedly coupled to the connection frame 140, characterized in that the spaced apart from each other on the same line, non-destructive inspection equipment.