CN102928515B - Ultrasonic fault detector and wedge block thereof - Google Patents

Abstract

The invention discloses a wedge for an ultrasonic flaw detector probe. The length of the bottom surface of the wedge is 15mm, the width is 7mm, the distance from the highest point of the top surface to the bottom surface is 4.5mm, and the top surface of the wedge and the horizontal plane The included angle is 20°-23°. In this way, the wedge of the ultrasonic flaw detection probe provided by the present invention can effectively reduce its own size on the basis of ensuring that the ultrasonic waves emitted by the probe have sufficient strength and good stability after reaching the workpiece. The invention also provides an ultrasonic flaw detection probe, which has a small thickness and can penetrate between the flange and the shed with a gap distance of about 10mm, thereby effectively judging whether there is a defect in the porcelain insulator.

Description

An ultrasonic flaw detector probe and its wedge

technical field

The invention relates to the technical field of ultrasonic flaw detection, in particular to a probe of an ultrasonic flaw detector and a wedge thereof.

Background technique

Porcelain post insulators (porcelain sleeves) are widely used in the field of power transmission, and the quality of post porcelain insulators (porcelain sleeves) has an important impact on the safety of power transmission. The lower flange of the pillar porcelain insulator (porcelain bushing) and the glue-like part of the porcelain part are most prone to defects such as cracks and air bubbles. In order to find defects in the glued part of the lower flange in time, most of the porcelain )flaw detection.

Please refer to FIG. 1 , which is a schematic diagram of a pillar porcelain insulator and an ultrasonic flaw detection probe in the prior art.

The ultrasonic detection system is mainly composed of three parts: probe 01, connecting data line, and flaw detector. The usual detection method is to place the probe 01 between the upper or lower flange 02 and the adjacent shed 03, close to the flange , Use ultrasonic waves to scan along the circumference, and inspectors judge whether the porcelain insulator is defective by observing the waveform signal of the flaw detector during the scanning process.

In the actual ultrasonic flaw detection process of pillar porcelain insulators (porcelain sleeves), some pillar porcelain insulators (porcelain sleeves) are encountered, and the distance between the upper or lower flange 02 and the adjacent shed 03 is too small, only 10 mm The conventional probe has a thickness of 12 mm, which causes the probe to not fit effectively with the surface of the insulator, resulting in a detection blind spot on this part of the equipment, which poses a great hidden danger to the safety of the power grid.

The ceramic wafer inside the probe is the core component for generating ultrasonic waves. A wedge is placed under the ceramic wafer. The bottom surface of the wedge is a horizontal plane, and the top surface is an inclined surface. The ceramic wafer is placed on the top surface of the wedge. In the prior art, the length of the bottom surface of the wedge is 24mm, the width is 12mm, and the distance between the highest point of the top surface and the bottom surface is 7.4mm.

In order to reduce the thickness of the probe so that the probe can penetrate between the lower flange with a gap distance of about 10mm and the adjacent shed, the size of the wedge needs to be reduced. However, if the size of the wedge is reduced proportionally, the strength and stability of the ultrasonic wave generated by the ceramic wafer reaching the workpiece will be affected, and it will not be possible to accurately determine whether the porcelain insulator has defects.

Therefore, how to reduce the size of the wedge without affecting the strength and stability of the ultrasonic wave emitted by the probe to reach the workpiece has become an important technical problem to be solved by those skilled in the art.

Contents of the invention

In order to solve the above technical problems, the present invention provides a wedge for an ultrasonic flaw detection probe, which can effectively reduce its own size on the basis of ensuring that the ultrasonic waves emitted by the probe have sufficient strength and good stability after reaching the workpiece. size. The invention also provides an ultrasonic flaw detection probe, which has a small thickness and can penetrate between the flange and the shed with a gap distance of about 10mm, thereby effectively judging whether there is a defect in the porcelain insulator.

For the wedge of the ultrasonic flaw detector probe provided by the present invention, the length of the bottom surface of the wedge is 15mm, the width is 7mm, the distance from the highest point of the top surface to the bottom surface is 4.5mm, and the clamping between the top surface and the horizontal plane of the wedge The angle is 20°-23°.

Preferably, the top surface of the wedge is provided with textures extending along the width direction of the wedge.

Preferably, the wedges are plastic wedges.

The present invention also provides an ultrasonic flaw detector probe, including the wedge as described in any one of the above.

For the wedge of the ultrasonic flaw detector probe provided by the present invention, the length of the bottom surface of the wedge is 15mm, the width is 7mm, the distance from the highest point of the top surface to the bottom surface is 4.5mm, and the clamping between the top surface and the horizontal plane of the wedge The angle is 20°-23°. Because the wedge size provided by the present invention is smaller than the wedge size in the prior art, the angle between the top surface of the wedge and the horizontal plane is 20-23 degrees, which means that when the bottom surface of the wedge is placed on the horizontal plane, the angle of the wedge The angle between the top surface and the horizontal plane is 20-23 degrees. The strength and stability of the ultrasonic waves generated by the wafer on the wedge to the workpiece to be detected are closely related to the size and inclination angle of the wedge. The present invention sets the inclination angle of the top surface of the wedge to 20-23 degrees, which can make the The ultrasonic wave is almost perpendicular to the thickness direction of the detected workpiece, thus ensuring the strength and stability of the ultrasonic wave reaching the detected workpiece.

In a preferred solution of the present invention, the top surface of the wedge is provided with textures extending along the width direction of the wedge. The top surface of the wedge is provided with a texture extending along the width direction of the wedge, which can not only prevent the wafer from sliding to both sides of the wedge, but also the contact surface between the wafer and the wedge is a textured surface, which can effectively improve the ultrasonic intensity generated .

The present invention also provides an ultrasonic flaw detector probe, including the wedge as described in any one of the above. With such an arrangement, the ultrasonic flaw detection probe provided by the present invention has a small thickness and can penetrate between the flange and the shed, thereby effectively judging whether there is a defect in the porcelain insulator.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some implementations recorded in the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic diagram of a pillar porcelain insulator and an ultrasonic flaw detection probe in the prior art;

Fig. 2 is a schematic diagram of the internal structure of the probe in a specific embodiment of the present invention;

Fig. 3 is a schematic diagram of the front view structure of the wedge block in the specific embodiment of the present invention;

Fig. 4 is a schematic left view structural diagram of a wedge in a specific embodiment of the present invention;

In Figure 1:

Probe—01, lower flange—02, umbrella skirt—03;

In Figure 2-Figure 4:

Wedge - 11, length of the bottom surface - L, width of the bottom surface - W, distance from the highest point of the top surface to the bottom surface - D, wafer - 12.

Detailed ways

This specific embodiment provides a wedge for an ultrasonic flaw detection probe, which can effectively reduce its size on the basis of ensuring that the ultrasonic wave emitted by the probe has sufficient strength and good stability after reaching the workpiece. This specific embodiment also provides an ultrasonic flaw detection probe, which has a small thickness and can penetrate between the flange and the shed with a gap distance of about 10mm, thereby effectively judging whether there is a defect in the porcelain insulator.

The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figure 2-Figure 4, Figure 2 is a schematic diagram of the internal structure of the probe in the specific embodiment of the present invention; Figure 3 is a schematic diagram of the front view of the wedge in the specific embodiment of the present invention; Figure 4 is a schematic diagram of the left side of the wedge in the specific embodiment of the present invention Schematic view of the structure.

For the wedge 11 of the ultrasonic flaw detector probe provided in this specific embodiment, the length of the bottom of the wedge 11 is L=15mm, the width of the bottom is W=7mm, the distance from the highest point of the top to the bottom is D=4.5mm, and the length of the wedge 11 is The angle between the top surface and the horizontal plane is 20°-23°.

It should be noted that the angle between the top surface of the wedge 11 and the horizontal plane is 20-23 degrees, which means that when the bottom surface of the wedge 11 is placed on the horizontal plane, the angle between the top surface of the wedge 11 and the horizontal plane is 20-23 degrees. 23 degrees.

Because the size of the wedge provided by this specific embodiment is smaller than that of the prior art, and the strength and stability of the ultrasonic waves generated by the wafer 12 on the wedge reaching the workpiece to be detected are closely related to the size and inclination angle of the wedge In this specific embodiment, by setting the inclination angle of the top surface of the wedge 11 to 20-23 degrees, the ultrasonic wave generated by the wafer 12 can be almost perpendicular to the thickness direction of the workpiece to be detected, thereby ensuring the strength and stability. Therefore, the wedge 11 provided in this specific embodiment can effectively reduce its own size on the basis of ensuring that the ultrasonic wave emitted by the probe has sufficient strength and good stability after reaching the workpiece.

In the preferred solution provided by this specific embodiment, the top surface of the wedge 11 is provided with textures (not shown in the figure) extending along the width direction of the wedge 11 .

The top surface of the wedge 11 is provided with a texture extending along the width direction of the wedge 11, which not only can prevent the wafer 12 from sliding to the both sides of the wedge 11, but also the contact surface between the wafer 12 and the wedge 11 is a textured surface, and the wafer 12 There is a gap between it and the wedge 11, and the intensity of the generated ultrasonic wave can be effectively improved.

It should be noted that the wedge 11 provided by the present invention can be a wedge made of engineering plastics, and of course, it can also be a wedge made of other materials, such as ceramics and wood.

This specific embodiment also provides an ultrasonic flaw detector probe, including the above-mentioned wedge. With such an arrangement, the ultrasonic flaw detection probe provided by this specific embodiment has a small thickness and can penetrate between the flange and the shed, thereby effectively judging whether there is a defect in the porcelain insulator.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. a voussoir for UT (Ultrasonic Testing) instrument probe, is characterized in that, the bottom surface length of described voussoir is 15mm, and width is 7mm, and the peak of end face is 4.5mm to the distance of bottom surface, and the end face of described voussoir and the angle of surface level are 20 degree-23 degree.

2. voussoir as claimed in claim 1, is characterized in that, the end face of described voussoir is provided with the texture extending along the Width of described voussoir.

3. voussoir as claimed in claim 2, is characterized in that, described voussoir is plastics voussoir.

4. a UT (Ultrasonic Testing) instrument probe, is characterized in that, comprises the voussoir as described in claim 1-3 any one.