JPS5943352A - Automatic flaw inspection for piping - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for automatically ultrasonically detecting welded parts of piping in nuclear power generation equipment, etc.

[Technical Background of the Invention and Problems Therewith] In general, piping in nuclear power generation equipment is constructed so that welded parts are periodically inspected by ultrasonic waves to ensure reliability. By the way, gt'r
′-Force development {II! Because workers are exposed to radiation during this piping inspection, their working hours are limited.
Therefore, in order to solve this inconvenience, the inspection work was inefficient, an automatic flaw detection system 11 was developed that automatically detects welded parts of pipes by ultrasonic waves by remote control. Meji (there is)

Such automatic flaw detection equipment generally has a ring-shaped guide rail attached to the outer 1% of the arrangement τ1, and is equipped with a transfer IJ machine that moves along the inner guide rail, and uses this moving mechanism to generate ultrasonic waves. Move the probe circumferentially along the weld line in the circumferential direction of the pipe to perform ultrasonic detection f%. Torii:] The next Kuthing ultrasonic probe Tokichi, Kokichi, interfered with IL-4, and the ultrasonic probe 7 moved away from the guide. Therefore, the guide rail C1 is installed at a distance fi □'- from the weld line to be inspected, and it is not 11 Jf, fr. When the guide rail is moved 11 degrees away from the welding line, the moving machines 11 will move along this guide rail and the ultrasonic probe will follow the trajectory of the weld. When #Q) is done, the gauge of μ) is significantly reduced. (For this reason, the mechanism that makes the ultrasonic probe follow the melted island I) is the first time that the ultrasonic probe 1ζ follows and breaks. 7' (Objective of the Invention J The present invention is directed to the above-mentioned A). If the weld silver that should be inspected is on a curved part of the piping, make sure to place the probe ↓ and add 7 r (on the weld silver) to perform a high-precision inspection. The purpose is to create an automatic flaw detection system for piping that is easy to draw and can also be drawn.

[Overview and treatment of the invention]

The present invention is: Piping installation (JIM 1 with 6P for mounting on the circumference)
j4, the current guide body, and the holding boob 1. , an annular ring part I provided concentrically with the guide body and rotatable with respect to the guide body, a ring part old rotating part 4f!j that rotationally drives this ring member, and a ring part I from the ring member to its center. It is attached to the outer periphery of the above piping (-7
Deko ring ↑ < 1 (the steady rest mechanism that forms the old steady rest,
The ultrasonic probe is installed at the ring center A: A and connects the ultrasonic probe to the outer periphery of the piping. ii, and a probe drive (41
°4 and 1+, prepared with gokomono=! Rir. Shigu V Gatsu T
The ultrasonic probe is held by the holding arm (7t) on the 1f'4'' of this guide. Place P7 nearby, but this ultrasonic probe will not interfere with the mounting mechanism.Yoto - Place this guide near the weld line (
PW is possible and the ultrasound probe is guided along this guide)
The trajectory when this ultrasonic probe hits the welded silver and transfers lightning j1, jd5r.

, the ultrasonic probe can be reliably guided along the welding silver, and the width of the ultrasonic probe can be
゛ can be done. In addition, in the case of a guide body like this, it is unstable to support several times from fj to 1f+i, but in this guide body +:t
+ J-ring part is rotatably installed 1t-J et al.) 1"7 (wind) This ring-part protrudes from the supporting surface tt":
$f1y: It touches the outer periphery of the rX pipe, so it supports the guide 4. ) will never become slightly stable.

[", 51.% of brightness, 11 cases of fi] The present invention σ)-'Ejj Mg examples will be fully explained with reference to the figure. In the figure, 4C71 (= J4 some - Yes.
1 Mechanism JCJ No.: As shown in Figure 3 = 1 semicircular cedar -... t1
The main body is 2m.

It consists of 2h. ,,'f, -L for -1-・
← 1 hole 3, 3 is formed on the platform surface of 21% of the main body A)
1. Fitting pins 4, 4 are protruded from the f1'ij mating surface of the other main body 2b (Z). C7 1. These 1t;
The fitting hole 4゜4 is the fitting hole 39. ? , and Jinno 1 also fits into main body 2a.

2b are arranged in a circular manner. ′
Y! , 5.5 are clamps, and these clamps 5.5 are configured to be connected to the main body 2^, 2bVi circle Jto. Mag c:, this body is 2 m
, 2 b K has a plurality of pressure screws 6 toward its center.
A number of rubber pads 7 are attached to the tips of the pressing screws 6. Then, by screwing the stiff pressing screw 6..., the seventh pad 7... is pressed around the pipe 8 once, and the pressing screw 6... is pressed. Hold the pipe 8 with H-]-2 body 2
11,2b? i- It is configured to be fixed to this pipe 8.

1. From this attachment mechanism, the culm length Arno.
1.) A guard is protruding, and this holding arm is
? At the tip of the - mark, there are several numbers 0 for the guide body. This holding chi 1. Mechanism S protrudes from mounting mechanism L, and F-knee 1
．． Body x and set υ1 on this arm body 11! 1-ta phase: example,'! It consists of Measure 12 and A-1. This joint mechanism 12 is installed above! Measures! The structure is such that the position b' of the guide body IO relative to the guide body 10 can be changed, and the supported guide body 10 can be fixed with any arbitrary 101P4. Also,
The guide body 10 is made of annular metal, and has a rack 13 formed on its inner circumferential surface, and guide grooves 14 (continuous in the circumferential direction) formed on both sides.

(7) On the inner periphery of this guide Iθ, an annular ring part 15 is concentrically provided. multiple〕o - rough
6 are provided, and these rollers 16.
... are fitted into the guide grooves 14, 14 of the second guide body 1θ. Further, a bearing 17 is interposed between the outer circumferential surface of the ring portion 15 and the inner circumferential surface of the guide body 1o.
This ring part +j151. :I-These rollers J6 and bearing 17...
Also, the guide body 10 is rotated 2 times (n-). Further, this ring member 15 is provided with a ring driving mechanism 1-8.

Which ring part drive machine S18 has a motor 19 and a reducer 20
and a gear 21, which meshes with the rack 13 of the guide body 10. This gear 2) is driven once by the motor 19 via the reducer 20, and the ring member 15 is rotated 2 times against the guide body 10.
t rotationally driven. Further, the ring member 15 is provided with a probe drive mechanism. The probe drive mechanism υ includes a screw body 23, a screw punch 24 provided on the main body 23 along the central axis direction of the guide body 10, and a screw punch 24.
and the nut member 2 screwed into this screw 4-T' 24.
5 and a motor 26 for rotationally driving the screw punch 24, and the screw punch 24 is rotated by the motor 26.
1, the nut member 25 is moved back and forth in the axial direction. However, this ultrasonic probe is configured to be pressed against the outer peripheral surface of the pipe 8 by a pressing spear (in the past 27).

A plurality of swinging mechanisms 11 are protruding from the center of the swinging member 15. 1
I'm here.

This swing 11 mechanism? -20 As shown in Figure 4, ring part A
15 protruding from the tl stand 2 ft 30, a nozzle head 131 to this stand 1 ft 30, a fixing nut 32 for fixing the shaft 31 of C, and this shaft 71.
・Put a slider on the tip of the γ■,
o-ra 337, il-no o-ra 33'f (towards the central force (=J force-) 0-ring ?42 has withered away, -J-, tjf: roller, ?, ? i-1, Suf0 ring, 5t on the small j force of 74, self 11〒18 outside 1.', 8 stirring on one side 1.1 Closed ring part H15 and guide body I0 missing,, +l -, W) [7, This ring part + 115, the guide is also 10 hundred places 51 sacrilege jib';
Nii1in1?1゛ShioJmesui]", UVi04toi"
V, there is Sano 1-γ.

6. Oh, Toha [i Lola? , 7 is formed by one magnetic q-ite.

16 strength) (, Jl: -+ 7C arrangement, actually sucks on 8,
1. Use ``UnitRfjness''.

Also, J: ':t: Guide body 10, [hiring part I 4
), 5t, J-first number piece K 9 t'ilJ 'J sl
: t i -) -7: l, ・b, ? :, 7'L la f
'7) How to solve and assemble? f(sσ)
+14 has been made so that the device can be used in the evening.

Next, the functional explanation of Part 2-Examples will be explained. First, piping 8
When inspecting the weld line A'4 in the circumferential direction at the bent part of J to ear Q (Ha J. So 1-, I have IC, M"'I Negative 11
(Align the center of the guide body 10 with the welding line A, and connect it concentrically with the piping 8, and set it around this point.

In addition, if the shape of the pipe 8 is known in advance, it corresponds to the illusion 5, this soil (to hold the pipe, make all the adjustments, and set the attachment mechanism -4 to the pipe 8. Attach the 'Ii'
Also, device 4 of device r1' can be done quickly. Next, shake], Ip, jEQ +7.3! Loosen the fixing nut 32 and screw the shaft 3 forward until the
A1;゛1 gLIJ,! ! death [2, ζσ) roller 33
(7) such that it comes into contact with the outer circumferential surface of the guide W8 by the force of the spring 340.
'Fixed, l-,? 2 fully tightened 7Y foot 31 Xun Gu 5
i4. Next, Ring Club H-Kakeru! Rotate the ring member 15 and say "l1Il drawing 18". -2゜＾′I sonic probe 2
8 is reciprocated in the axial direction. Therefore, the ultrasonic probe 28 moves in the circumferential direction along the welding line A while reciprocating in the axis 1 direction [-1, the ultrasonic probe 28 in the part from this melting point to section A] Okoko.Also, Furi 11・櫟f～22・
The roller 33 of the spring 94 contacts the outer circumferential surface of the pipe 8 due to the slope and rolls in the circumferential direction, causing the ring member 15 and the guide body 10 to vibrate i11[- 1°,
1) Accurately position the rollers 1, etc. In one embodiment, the rollers 3 and 7 are made of magnetic material and are attracted to the pipe 8, so the fifth concave 1, the guide body 10 is arranged horizontally i'ft, L
In case? - The guide body 1θ and ring member 1.5 are heavy,
l &i: J: Prevents IF from shifting in the direction of the axial force.

[Effects of the Invention J: As in the present invention 1, a mechanism that can be attached to the circumferential surface of the piping, a current guide body, and a protrusion from the mounting mechanism.
1) A holding arm mechanism for holding the guide body in the concentric position of the circumferential weld line to be inspected on the piping; The current ring member is rotatable with respect to the body, a ring member rotation mechanism that rotates the ring member, and a ring member that protrudes from the ring member toward the center and comes into contact with the outer peripheral surface of the piping. A vibration mechanism that acts as a steady rest, and a mechanism that presses an ultrasonic probe provided on the ring member against the outer peripheral surface of the piping and moves the ultrasonic probe back and forth in the axial direction of the piping. It is equipped with a probe nib drive mechanism. Therefore, since the guide body is held at a position apart from the mechanism by the holding arm mechanism, even if the ultrasonic probe is placed near the guide body, the ultrasonic probe will not be attached. It will not interfere with the mechanism.'' This guide can be placed near the welding line, and the trajectory and ultrasonic probe when the ultrasonic probe is guided along this guide. The trajectory of the guide body when moving along the welding line matches the trajectory of the guide body, and the ultrasonic probe can be reliably followed along the welding line, making it possible to inspect at a height of 177 degrees. Like r-1, ma'r ni 'Ci si jl tJ
J, ti￥ to 1.1 yen A-ins, Ir'j to 11'4, its support will be unstable, but this guide body ('( is the ring member is rotating) A few phrases were attacked by Y1-
The Zwata Shaking JJ machine (1~
The guide body that comes into contact with the surface of the piping (the support is slightly stable, ξ and +, l, no, etc. 41)
J fruit is a person.

[Brief explanation of the drawing]

1. 1.: + Implementation of the invention 11 All 71 mo.
Figure 3): l, , lliii・1 promotion structure mountain view, 2?
Figure 1.4 is II of 11 and 14.
Figure and i1'l', 6 l so1('', several example states are shown t(!'!+1 and 1', there is LIC., L・jpii・] cedar'' beg tf! a,
Sen'拮'f -1,4 傳OLFI, 1
() ・One of them, J5...Ring pipe [X O'i,
! , -4" ring tube 81\[)1.11 bay i1i'J
O:', 4 charges? , Yi-eup...I ¥: 14 Zf 瓜<+1 11 枦(8,28・jb 1′1n y(4 sweep f
1 degree whip completed. 1-11'",! Fi agent Ben 3411 Sat ≦ Fu Jiang i Indication % Forelight No. 57-153407 No. 2, Name of the invention Automatic flaw detection device for piping 3, Relationship with the Nagisa case for supplementary iE Patent applicant (307) Tokyo Shibaura Electric Co., Ltd. No. 5, [1 amendment 1 Correct Content -) In the 6th line of page 3 of the specification, the phrase [consisting of welding line A] is revised to read [considerably extending from welding line A]. (2) From the first line to the second line of page 11 of the specification [1 indicates "probe drive mechanism"] 1 probe drive mechanism zzJ
I am corrected. (3) Page 13, line 14 to line 15 [[
-28...Ultrasonic probe -1 followed by "-1)-...
Added "steady stop mechanism". (5) Edit Figures 1 and 2 as shown in the attached sheet.

Claims (2)

[Claims] (1) JIV on the outer circumferential surface of the 1st arm, 11 function right J (q i τ J (next measure, the current guide body, upper
a holding boom mechanism that protrudes from the upper A11 guide body and holds the guide body in a position concentric with the circumferential weld line of the piping to be inspected; The current ring 41'', H and this ring 111
The ring part that rotates the rotor is protruded from the ring member toward its center and touches the outer circumferential surface of the piping. > r L, the swing market machine ttov which forms the first swing of the ring part H of the lever, and the swing part Ii installed in the ring part 12
i Nt #, a probe is placed on the outer circumferential surface of the tensile arrangement η', and this ultrasonic probe ~1゛-10, the probe r- moves back and forth in the direction of the axial force of the ML piping. JII< The moving mechanism and the actual crystal [7'A- That is the characteristic of the piping and the flaw detection equipment J. (2) Front L! The automatic flaw detection device for piping according to the scope of the patent, item 1, characterized in that the piping is exposed to the inner circumferential elevation of the guide body.