JPS6236534B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording device for flaw detection results in an ultrasonic flaw detection apparatus using two probes, a transmitting probe and a receiving probe.

BACKGROUND ART Recently, with the increase in the number of steel structures, welding work has been widely adopted, and the quality of the construction work is required to be strictly controlled. Various methods are used for non-destructive testing to detect defects, or flaws, in welds, but among them, flaw detection methods that use ultrasonic waves are excellent, especially for welding thick-walled steel materials and on-site welding work. It is demonstrating its power.

Ultrasonic flaw detection methods include methods that use a single probe for both transmission and reception, and methods that use two probes, each with two probes responsible for transmission and reception. Although the ultrasonic flaw detection method using two probes is superior in both cases, it is important to be able to easily record the flaw detection results in either case.

According to the conventional recording method in ultrasonic flaw detection, a recorder is used to feed the recording paper at a constant speed, and this is linked to the flaw detection speed (probe movement speed). This not only makes the device mechanically complex and therefore expensive, but also causes failures in the field where it is handled roughly.

As such, the applicant proposed an ultrasonic flaw detection device that can be suitably used in the field, as disclosed in Japanese Unexamined Patent Publication No. 7643/1983. However, it is troublesome to analyze records at the site, and it is desired that the degree of defects, that is, the size of scratches, small scratches, etc., be immediately understood by workers.

Further, for example, Japanese Patent Laid-Open No. 159784/1984 discloses a flaw detection method that indicates the position of a defect in the X, Y, and Z directions. However, such methods are not suitable for on-site work due to the complexity of the equipment, and if there are defects beyond a certain level during on-site work,
All you have to do is rehang it and weld it. It must also be determined immediately after welding work.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a recording device for flaw detection results in an ultrasonic flaw detection apparatus that allows the location and size of defects to be easily known at a welding site.

According to the present invention, the transmitting probe emits an ultrasonic beam toward the welding part, and the receiving probe receives the beam reflected from the welding part, and the transmitting probe is used as the receiving probe. The ultrasonic flaw detector is connected to move equidistantly in opposite directions from the base line, and the electric signals from the transmitting and receiving probes are input to detect defects in the weld. In a flaw detection result recording device that can be used with an ultrasonic flaw detection device equipped with a flaw detection device, a band-shaped recording paper corresponding to the position of the weld line to be welded is provided on the welding member to be welded, and the longitudinal direction of the recording paper is The horizontal axis corresponds to the weld line, and it is equipped with a movable pen support that is directly connected to the probe, and the pen support supports multiple pens that classify and display the degree of defects in the weld. The pens are selectively activated by an output signal from the ultrasonic flaw detector that corresponds to the degree of defect in the weld, and record the position and degree of the defect in the weld on a recording paper. It's getting old.

Therefore, since the position of the defect on the recording paper corresponds to the position of the weld line, by comparing the recording paper with the weld line, it is possible to immediately know in which part the defect is present. The cross-sectional area of the weld line at the site is not very large, so if the position is known, even if the depth etc. are not known, it is possible to adequately deal with the problem. Furthermore, since the pen operates according to the degree of defects, the degree of defects at that location can be immediately known. For example, if there are many small flaws, larger flaws will also be displayed, so it is known in advance how many flaws are allowed based on the strength based on the purpose of welding, and therefore any inconvenient flaws can be repaired immediately. do it. In particular, since the recording paper is placed on the welding member, recording and inspection operations are easy, and installation is simple.

Therefore, a value corresponding to the sum of the cross-sectional areas of the defects is obtained, and the present invention allows the position and degree of defects in welding work to be immediately known on-site, thereby simplifying the weld line inspection work.

When implementing the present invention, the degree of defects is large, medium, and
It is preferable to display it in about 3 levels of small. For example, when welding a beam to a column, a recording sheet may be provided on the beam. In this way, the recording paper may be provided on the horizontal welding member.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows a situation in which a weld C between a column A and a beam B is being inspected using an ultrasonic flaw detector. The electric signals from the transmitting probe 1 and the receiving probe 2 are inputted onto the surface of the beam B to display the degree of flaw in the weld C, that is, the degree of the welding defect. An ultrasonic flaw detector 3 is placed. The transmitting flaw detector 1 and the receiving flaw detector 2 are connected by an interlocking jig (not shown), and are moved equidistant from each other in opposite directions indicated by arrows from the base line. The ultrasonic flaw detector 3 is provided with defect indicator lamps that display the degree of flaws; in the illustrated example, three defect indicator lamps 3A, 3B, and 3C, large, medium, and small, are provided.

A transmitter probe 1 emits an ultrasonic beam toward a weld C, and a receiver probe 2 receives the beam reflected at the weld. At this time, the transmitting probe 1 and the receiving flaw detector 2 are moved equidistantly in directions opposite to each other as indicated by the arrows, and the entire area of the welded part C is inspected for flaws from one end to the other. Electric signals from the transmitting probe 1 and the receiving flaw detector 2 are input to the ultrasonic flaw detector 3,
Based on the signal, detect the degree of flaw in welded part C,
Defect indicator lamp 3A, 3 according to the size of the scratch
Either B or 3C lights up. In the figure, a lamp 3A indicating a large defect is lit.

In order to record the flaw detection results, the output corresponding to the classification of the defect display, that is, the large, medium, or small defect, is electrically extracted, and a recording device, indicated by 4, which operates based on the signal, is linked with the transmitting flaw detector 1. The transmitting flaw detector 1 is attached to the transmitting flaw detector 1 so as to be moved.

FIG. 2 shows details of the recording device, and the recording device 4 has a pen support 5 that moves along with the transmitting probe 1 on the surface of the beam B, and trochanters 6, 6 are attached to the pen support 5. It is being The pen support base 5 is provided with pens 7A, 7B, and 7C that are activated by electrical signals from the ultrasonic flaw detector 3 according to defect display classifications. The pens 7A, 7B, and 7C are normally pushed upward by the spring 8, and when a signal indicating a large, medium, or small defect is input, the electromagnets 9, 9
operates and the pens 7A, 7 resist the spring force of the spring 8.
It is designed to push down either B or 7C. In the figure, the pen 7A with the defect display size is pressed down.

In use, as shown in FIG. 1, the recording paper 10 is fixed on the surface of the beam B over the entire movement range of the transmitting probe 1, and the recording device 4 is moved together with the transmitting probe 1. Recording is performed based on electrical signals from the ultrasonic flaw detector 3.

In this case, since the transmitting flaw detector 1 and the receiving flaw detector 2 are moved in opposite directions from the base line by equal distances, the positions of the flaw detectors 1 and 2 and the position of the welding line C are dimensionally 1. There is a one-to-one correspondence, so the longitudinal axis of the strip-shaped recording paper 10 corresponds to the position on the weld line C. In addition, the short axis displays the size of the defect by individually operating three different pens 7A, 7B, and 7C in response to the lighting of the defect indicator lamps 3A, 3B, and 3C of the ultrasonic flaw detector 3. It turns out.

As explained above, the flaw detection result recording device in the ultrasonic flaw detection apparatus according to the present invention has a simple structure, can be manufactured at low cost, and can record flaw detection results extremely easily. It is particularly useful for inspecting welds for defects in the field.

In addition, when carrying out the present invention, in the illustrated embodiment, three stages of display, large, medium, and small, have been described, but it is also possible to record the defect size in a continuous graph, for example, by setting the size of the defect on the short axis and the position on the long axis. . In that case, the electrical signal may be output as a continuous amount of change. Further, as for the recording pen, a thermal pen or the like can be implemented without using the combination of a spring and an electromagnetic force as shown in the figure, and furthermore, for example, three levels of display can be distinguished by color separation.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a perspective view showing the state of use of an ultrasonic flaw detection device equipped with a flaw detection result recording device according to the present invention, and FIG. 2 is a detailed front view of the recording device. . 1... Transmission probe, 2... Receiving probe, 3...
Ultrasonic flaw detector, 3A, 3B, 3C...defect indicator lamp, 4...recording device, 5...pen support stand, 6...
... Trochanter, 7A, 7B, 7C... Pen, 8... Spring, 9... Electromagnet, 10... Recording paper.

Claims (1)

[Claims] 1 Equipped with a transmitting probe that emits an ultrasonic beam toward the welding part and a receiving probe that receives the beam reflected from the welding part, and the transmitting probe and the receiving probe are separated from each other from the baseline. Ultrasonic flaw detection with ultrasonic flaw detectors that are interlocked to move equidistantly in opposite directions and receive electrical signals from the transmitting and receiving probes to detect defects in the weld. In a flaw detection result recording device that can be used with the device, a strip-shaped recording paper corresponding to the position of the welding line to be welded and having the same size is provided on the welding member to be welded, and the longitudinal axis of the recording paper is aligned with the welding line. It is equipped with a movable pen support that is directly connected to the probe, and the pen support supports multiple pens that classify and display the degree of defects in the weld. The ultrasonic pen is selectively activated by an output signal from the ultrasonic flaw detector according to the degree of defect in the weld, and records the position and degree of the defect in the weld on a recording paper. A recording device for flaw detection results in flaw detection equipment.