JPS59180358A - Automatic ultrasonic flaw detector of gas insulation electric device - Google Patents

Abstract

PURPOSE:To improve the efficiency of flaw detection by moving a probe fitted to a holder to an optional position on a scanning machine and performing flaw detection from both sides of a weld zone. CONSTITUTION:When flaw detection is carried out from the right or left side, a probe 3a or 3b for detecting the flaw of the weld zone 2 from the right or left side is selected by a probe switch 11. Therefore, the probe 2 is moved by the scanning machine 7 without changing the probe 3 in direction and a probe operation switch 11 is only operated to perform the flaw detection from both sides of the weld zone 2, so the flaw detection efficiency is improved.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to an automatic ultrasonic flaw detection device ( :Related.

[Technical background of the invention and its problems] Conventionally, ultrasonic flaw detection technology for piping systems includes online flaw detection systems in pipe manufacturing lines of steel plants,
Alternatively, there are systems that are used for periodic inspections during the service period of atomic couplers.In these cases, the materials to be inspected are carbon steel, stainless steel, etc., so the welded parts have relatively smooth welding waves. It has a shape. On the other hand, since the material of the gas-insulated wire vibrator is usually aluminum, the shape of the welding wave depends on the welding conditions and the posture of the welder.
- When ultrasonic flaw detection is performed on such test material C:1, C2 detects the defect echo from the defect that has occurred near the root surface of the weld (2) It becomes difficult to separate the pseudo echoes reflected from the discontinuous part. Therefore, in order to separate and detect these echoes, it is necessary to perform flaw detection from both sides of the weld and compare the flaw detection results from both sides. Therefore, it is necessary to comprehensively judge defects.

However, since the gas-insulated busbar is installed in a narrow bit, it is difficult to perform flaw detection from one side of the weld, then reinstall the probe drive mechanism and perform flaw detection from the opposite side of the weld. It also has poor performance and reduces the flaw detection efficiency for detecting flaws around the entire circumference of aluminum pipe circumferential welds. Especially gas insulated bus f
In the second case, since welding is required at the installation site, it is desirable to improve workability.

Therefore, in order to improve the flaw detection efficiency, it is better to detect flaws from both J111 of the welded part without reinstalling the probe drive mechanism.
Two requests were made.

[Object of the Invention] The present invention has been made based on the above circumstances, and its purpose is, for example, to perform ultrasonic flaw detection on a circumferential welded part of an aluminum pipe for a gas insulated bus bar from both sides. It is possible to detect flaws around the entire circumference without reinstalling the probe drive mechanism, which reduces the return line of the flaw detection time, that is,
It is another object of the present invention to provide an ultrasonic automatic flaw detection device for a gas insulated electrical device capable of improving flaw detection efficiency.

[Summary of the invention] In order to achieve the above object, the present invention runs a probe for detecting flaws in a welded part of an aluminum pipe, which is a test material, on both sides of the welded part, and detects flaws obtained by the probe. Two types of flaw detection signals are comprehensively processed to perform welding.Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In Figure 1, l
, 1' is an aluminum pipe for a gas insulated bus bar, which is the material to be tested, and the butt circumferential welded part 2 (two welded connections are made) at the ends of this material 1.1' is the aluminum pipe 1, Inside 1', an insulating gas and a charging part such as a C double bus conductor are housed.2' is a welding wave peculiar to aluminum welding that occurs near the welding root surface; This is an area where defects are likely to occur.

An ultrasonic probe 3 (hereinafter referred to as a single probe) that receives and transmits ultrasonic waves is provided near the bath contact portion 2 on the specimen 1'.
A probe holder 4 that holds the probe 3 via the rotating part 41 is slidable (attached to the slide rail 5). Up(
- The scanner 7 is installed on the scanner drive guide rail 6 which has been installed in advance so as to be parallel to the axial outer peripheral surface of the specimen 1, 1'. Scanning g7 &''ii Rackion mechanism 8 and above idle rail 6, that is, object 1'
It is designed to run around the entire circumference of the area.

The scanner 7 is connected to a scanner controller 9 which has a function of setting the position of the probe holder 4 on the slide rail 5 and a function of setting the scanning direction, scanning pitch, etc. of the scanner 7; Two ultrasonic transmitter/receiver/digital processors 10+ to which position data such as reflected waves of ultrasonic waves No. 7 are transferred are connected.

Next, the present invention (1) The operation of the ultrasonic automatic hot water sampling device (2) constructed as described above will be explained below.

At C1, where ultrasonic flaw detection is performed on the welded part 2 between the test materials 1 and 1', the probe holder 4, that is, the probe 3, is first welded along the slide rail 5 according to a command from the scanner controller 9. Move it to the optimal position for the flaw detection conditions near part 2. Ultrasonic waves are transmitted to the welding area 2 from the probe 3 placed in the optimal position.
Send in direction In. The ultrasonic waves that hit the welding part 2 are reflected, and the reflected waves are received by a receiving device built into the probe 3, and this signal is transmitted to the ultrasonic transmitter/receiver No. 46 processor 2.

While the probe 3 repeats the above-described flaw detection operation, the entire circumference (
Perform double flaw detection.

Next, the case of flaw detection from the opposite side of the welded part 2 will be described. The scanner controller 9 moves the probe 3 in the left direction (two directions in the figure), and then rotates the flaw detection direction sighting cap 41 of the probe holder 4 to reverse the direction in which the ultrasonic waves are emitted from the probe 3. After setting the probe 3 to the optimum position of the dashed line and the detection direction (two directions), repeat the above-mentioned flaw detection operation of the probe 3 to detect flaws from the left side of the bath contact area. 1. The entire circumference C of the welded part 2 between 1' and 1' is carried out.Furthermore, by comprehensively comparing and judging the flaw detection results from both directions for the welded part 2, it is possible to determine the presence or absence of welding defects and the difference between welding defects and welding waves. It becomes possible to make a determination.

[Other Examples] Next, another embodiment will be described with reference to FIG.

That is, the probe holder 4f2 is provided with two probes 3a and 3b with different flaw detection directions, and is further provided with a probe for selecting the probes 3a and 3b to be used on both sides of the welding part 2. The selection switch 11 is connected to the scanner 7 and the ultrasonic transmitter/receiver signal processor 10.
This is a configuration established between the Therefore, when performing flaw detection from the right side of the welded part 2 in Fig. 2(a), the probe 3a'r probe selection switch IJ for flaw detection from the right side towards the welded part 2 is When the flaws are detected from the pressure side, the probe 3b for flaw detection from the left side toward the welding part 2 is selected, and the probe selection switch I is also turned on.
Select from N2. Therefore, with such a configuration, the probe 3 can be moved without rotating the probe direction, that is, the direction of the probe, and the probe selection switch 11 can be moved.
By simply operating the , flaw detection can be performed from both sides of the bath contact portion 2, and the flaw detection efficiency can be further improved by C2.

[Further embodiments] Furthermore, (Figures 2 and 3 are embodiments in which the flaw detection efficiency can be further improved. In other words, two probe holders 4 and 4' are mounted on the slide rail 5 of the scanner 7. and this probe holder 4,
Two probes 3 with 1800 different detection directions at the tip of 4'
．． According to the settings of the scanner controller 9, these two probe holders 4 and 4' can be linked together or individually so that the distance to the welding part 2 is the same. Two independent C positions are set. Also two probes 3.
The flaw detection signal from 3' is detected by the ultrasonic transmitting/receiving signal processor 1o, so that flaw detection is carried out continuously (twice) from both welded parts 20 in minute time divisions.
It is possible to obtain flaw detection data from both sides of the contact portion 2 almost once, so flaw detection is completed by simply rotating the scanner 7 once around the circumference of the aluminum vibrator 1, 1' that is the material to be inspected. Therefore, the flaw detection efficiency can be further improved.

[Effects of the Invention] As explained above, according to the present invention, the probe holder and the probe attached to this holder can be moved to an arbitrary position C on the scanner, and the welded portion can be moved. Since the structure allows flaw detection to be easily carried out from both sides of the pit, the number of setup steps required to carry out automatic flaw detection in a narrow and poorly equipped gas insulated bus bar installation pit can be reduced by six minutes. It is possible to provide an automatic ultrasonic flaw detection device for electrical devices with broken wires that can improve flaw detection efficiency.

[Brief explanation of the drawing]

Figure 1 shows the present invention for gas insulated busbar aluminum pipes. 7i Automatic Flaw Detection Equipment 6 yen for quick use Shigukoichi Jitsugyo 1 (-1, 1 configuration diagram, Fig. 2 (a), (b)
) is a simplified diagram of the flaw detection pattern ρji at two locations showing the 494 configuration of other embodiments 1ζ and 11 according to the present invention, and a configuration diagram showing other additional examples of Da + and H2 of the present invention. Deol0 1, l:'--Test material 3, 3a, 3I)
・Probe 4.4'... Probe holder 41... Throwing direction rotating part 5... Slide rail 6... Guide rail for driving the core 7... Running machine 9
... Run (number of controllers 10... Ultrasonic transmitter/receiver/signal processor IJ... probe preliminary selection switch Representative Patent attorney Noriyuki Chika (and one other person) Figure 1 Figure 2 Figure 3

Claims (4)

[Claims] (1) A gas-insulated electrical device in which the ends of the first and second aluminum pipe test tubes housing the internal C2 assembly gas and the energizing part are butted together, and the inner peripheries of the butted parts are connected by welding 1-. In the ultrasonic automatic flaw detection device, a guide rail provided on the circumference of the one test material;
A scanner that can run freely on this guide rail, a slide rail that is supported on the knee side and extends approximately parallel to the longitudinal axis of the specimen; A probe holding member that holds an ultrasonic receiving and transmitting probe that is movably provided on the slide rail and is arranged in close proximity to the test material; a controller that controls the scanner; and a processing device that processes the output signal from the probe, and after the welded part is ultrasonically tested from the first test material side, the probe holding system is moved along the slide rail C2 to the second test material side. An automatic ultrasonic flaw detection device in a gas-insulated one-gas device that moves to the material side and performs ultrasonic flaw detection of the welded part from the second test material side. (2) The ultrasonic receiving and transmitting probe held by the probe holding member C2 is rotatably held by the probe holding member, and ultrasonic flaw detection is performed from the side of the first test material. An automatic ultrasonic flaw detection device for a gas-insulated electrical device according to claim 1, which performs ultrasonic flaw detection from the second test material side by being rotated by 180° with respect to the position. (3) Probe holding member (2) Holds two probes with different directions of transmitting and receiving ultrasonic waves from the probes, and outputs signals from the two probes via a selection switch. The ultrasonic automatic apparatus in the gas-insulated electric device according to claim 1, wherein the selection switch is connected to a processing device that processes output signals from the probe and selects a probe that transmits and receives ultrasonic signals. Flaw detection equipment (4) A gas-insulated electrical device in which the ends of the first and second test materials made of aluminum pipes are housed inside with insulating gas (two energized parts are housed), and the ends of the butted parts are connected by welding. In the ultrasonic automatic flaw detection device C, there is a guide rail provided on the circumference of one of the test materials, a scanner disposed so as to be able to run freely on the kite rail, and a force that holds one side of the scanner. 1. Longitudinal axis direction f of the test material
The first and second rails extend substantially parallel to each other, and the first and second rails each hold a probe for an ultrasonic probe provided on the rail and arranged in close proximity to the specimen. The welded portion is held by the first probe holding member, a controller that controls the front Ne scanner, and a processing device that processes the output signal from the probe. Alternately (two ultrasonic flaws) An automatic ultrasonic flaw detection device for gas-insulated electrical equipment.