阅读说明：本技术 一种超声检测gis绝缘件内部缺陷的探头耦合装置 (Probe coupling device for ultrasonically detecting internal defects of GIS insulating part ) 是由 郝艳捧 郑尧 何伟明 田方园 邹舟诣奥 阳林 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种超声检测GIS绝缘子内部缺陷的探头耦合装置,是由上端盖、底面以及四个侧面组成的空心长方体。上端盖设有探头预留口、探头固定装置和耦合剂注入口；探头预留口为圆形口,位于上端盖的中心位置；探头固定装置包括支架、薄壁卡箍和旋转轴；支架包括基座和基座环,基座环位于基座上方；薄壁卡箍为伸缩可调节组件；旋转轴为两段等长的不锈钢细圆棒,两段细圆棒一端均与薄壁卡箍焊接连接,另一端均放入基座环中进行固定；耦合剂注入口为圆形口；四个侧面分别为前侧面、后侧面、左侧面以及右侧面四个侧面；前侧面刻有垂直刻度尺和转角显示盘。本发明能够方便、高效、低成本地对不同曲率的GIS绝缘件进行超声检测。(The invention discloses a probe coupling device for ultrasonically detecting internal defects of a GIS insulator, which is a hollow cuboid consisting of an upper end cover, a bottom surface and four side surfaces. The upper end cover is provided with a probe reserved opening, a probe fixing device and a coupling agent injection opening; the probe reserved opening is a circular opening and is positioned in the center of the upper end cover; the probe fixing device comprises a bracket, a thin-wall clamp and a rotating shaft; the bracket comprises a base and a base ring, and the base ring is positioned above the base; the thin-wall hoop is a telescopic adjustable component; the rotating shaft is provided with two sections of stainless steel thin round bars with equal length, one end of each of the two sections of thin round bars is welded with the thin-wall clamp, and the other end of each of the two sections of thin round bars is placed in the base ring for fixing; the couplant injection port is a circular port; the four side surfaces are respectively a front side surface, a rear side surface, a left side surface and a right side surface; the front side surface is carved with a vertical graduated scale and a corner display disc. The invention can conveniently and efficiently carry out ultrasonic detection on the GIS insulators with different curvatures at low cost.)

1. The utility model provides a probe coupling device of ultrasonic testing GIS insulator internal defect which characterized in that, the device is the hollow cuboid that comprises upper end cover, bottom surface and four sides.

The upper end cover is provided with a probe reserved opening, a probe fixing device and a coupling agent injection opening;

the probe reserved opening is a circular opening, is positioned in the center of the upper end cover and can be used for inserting the probe;

the probe fixing device comprises a bracket, a thin-wall clamp and a rotating shaft; the bracket comprises a base and a base ring, and the base ring is positioned above the base and used for fixing and supporting the rotating shaft; the thin-wall hoop is a telescopic adjustable component and is used for fixing the probe; the rotating shaft is provided with two sections of stainless steel thin round bars with equal length, one end of each of the two sections of thin round bars is welded with the thin-wall clamp, and the other end of each of the two sections of thin round bars is placed in the base ring for fixing;

the couplant injection port is a round port and is used for injecting the couplant into the probe coupling device, and the couplant is poured out through the couplant injection port after the ultrasonic detection is finished;

the four side surfaces are respectively a front side surface, a rear side surface, a left side surface and a right side surface; a vertical graduated scale and a corner display disc are engraved on the front side surface, and the vertical graduated scale is used for observing and recording the liquid level of the couplant and the position of the probe in the couplant; the rotation angle display disc is used for observing and recording the position of the probe and the rotation angle of the probe.

2. The device of claim 1, wherein the top cap, the left side, the right side, and the back side are all stainless steel plates, the front side is transparent plexiglass, and the bottom is a latex film.

3. The device of claim 1, wherein the lower ends of the front side, the rear side, the left side and the right side are provided with grooves for fixing the bottom latex film.

4. The apparatus of claim 1, wherein the upper end cap has a length of 50mm, a width of 40mm, and a thickness of 2 mm.

5. The device of claim 1, wherein the probe head is 25mm in diameter.

6. The device of claim 1, wherein the couplant injection port is 2mm in diameter.

7. The device of claim 1, wherein the front side is 2mm thick, 50mm wide and 40mm high; the thickness of the back side surface is 2mm, the width is 50mm, and the height is 40 mm; the left side is 2mm thick, 40mm wide and 40mm high; the thickness of the right side surface is 2mm, the width is 40mm, and the height is 40 mm; the thickness of the bottom surface is 0.02 mm.

8. The apparatus of claim 1, wherein the vertical scale is in the range of 0-40mm with a minimum step size of 1 mm; the scale range of the rotation angle display disc is 0-50 degrees, and the minimum step length is 1 degree.

9. The device of claim 1, wherein the groove is 2mm wide and 1mm deep, and the groove is 3mm from the bottom surface.

10. The device of claim 1, wherein the thin-walled clamp has an adjustable maximum diameter of 30 mm; the rotation axis is rotated by a maximum angle of 45 °.

Technical Field

The invention relates to the field of power transmission and transformation insulating equipment, in particular to a probe coupling device for ultrasonically detecting internal defects of a GIS insulating part.

Background

The gas insulated metal enclosed switchgear (GIS) is applied more and more widely in power transmission and transformation systems, GIS insulators (including basin-type insulators, post insulators, insulating shafts and the like) are main insulating equipment in the GIS, epoxy resin, curing agents (generally acid anhydrides) and fillers (alumina powder) are mixed and placed in a mold with a metal insert to be cured at high temperature, if the quality control in the curing process is not good, the defects of shelling, interlayer, untight combination and the like can occur in the intersection of epoxy materials and aluminum alloy of the insulators, and the internal defects can cause the electric field in the insulators to be unevenly distributed in the practical application process, so that the phenomena of partial discharge of the insulators, abnormal heating of the insulators and the like can be caused, the aging of the insulators is accelerated, the performance of the insulators is reduced, and the normal operation of the GIS is directly threatened. Therefore, whether the GIS insulating part has internal defects or not is determined as soon as possible, and the method has important significance for guaranteeing the safe operation of the power system.

The ultrasonic detection technology is increasingly concerned in the field of detecting internal defects of GIS insulators by virtue of the advantages of low cost, convenience in carrying, high reliability, nondestructive detection and the like. When GIS insulating parts with different curvatures are detected by ultrasonic, such as insulating parts with different voltage levels or different parts of the same insulating part, the traditional method is to select ultrasonic probes or ultrasonic wedges with different sizes according to the surface curvature of the insulating part, and the method can increase the detection cost and reduce the detection efficiency.

Disclosure of Invention

The invention aims to provide a probe coupling device for ultrasonically detecting internal defects of a GIS insulator. The bottom surface of the device is a high-elasticity and ultra-thin emulsion film, and the device can be in seamless contact with the tested insulators with different curvatures, so that stable and efficient transmission of ultrasonic waves is ensured. Meanwhile, the incident angle of the probe can be rotated in real time and the incident distance of the probe can be adjusted according to the detection state, so that the ultrasonic detection can be conveniently and efficiently carried out on the GIS insulators with different curvatures at low cost.

The purpose of the invention can be realized by the following technical scheme:

a probe coupling device for ultrasonic detection of GIS insulator internal defects is a hollow cuboid composed of an upper end cover, a bottom surface and four side surfaces.

The upper end cover is a stainless steel plate and is provided with a probe reserved opening, a probe fixing device and a coupling agent injection opening;

the probe reserved opening is a circular opening, is positioned in the center of the upper end cover and can be used for inserting the probe;

the probe fixing device comprises a bracket, a thin-wall clamp and a rotating shaft; the bracket comprises a base and a base ring, and the base ring is positioned above the base and used for fixing and supporting the rotating shaft; the thin-wall hoop is a telescopic adjustable component and is used for fixing the probe, and the adjustable maximum diameter is 30 mm; the rotating shaft is two sections of stainless steel thin round bars with equal length, one end of each of the two sections of thin round bars is connected with the thin-wall hoop in a welding mode, the other end of each of the two sections of thin round bars is placed in the base ring to be fixed, the rotating shaft drives the probe in the thin-wall hoop to rotate, and the maximum rotating angle is 45 degrees;

the couplant injection port is a round port and is used for injecting a couplant (the couplant is usually water, transformer oil, glycerol or engine oil and other liquid) into the probe coupling device, and after the ultrasonic detection is finished, the couplant is poured out through the couplant injection port;

the four side surfaces are respectively a front side surface, a rear side surface, a left side surface and a right side surface; the front side surface is made of transparent organic glass, a vertical graduated scale and a corner display disc are engraved on the front side surface, and the vertical graduated scale is used for observing and recording the liquid level of the couplant and the position of the probe in the couplant; the rotation angle display disc is used for observing and recording the position of the probe and the rotation angle of the probe.

The left side surface, the right side surface and the rear side surface are stainless steel plates, and the bottom surface is a latex film;

the lower extreme of leading flank, trailing flank, left surface and right flank all is equipped with the recess for fixed bottom surface emulsion membrane.

The bottom surface is the emulsion membrane, and the emulsion membrane texture is even transparent, can be according to the elastic deformation of self and different curvatures surveyed insulating part seamless contact, guarantees that the ultrasonic wave is transmitted steadily high-efficiently.

Preferably, the upper end cap has a length of 50mm, a width of 40mm and a thickness of 2 mm.

Preferably, the probe head reserve opening is 25mm in diameter.

Preferably, the couplant injection port is 2mm in diameter.

Preferably, the front side has a thickness of 2mm, a width of 50mm and a height of 40 mm; the thickness of the back side surface is 2mm, the width is 50mm, and the height is 40 mm; the left side is 2mm thick, 40mm wide and 40mm high; the thickness of the right side surface is 2mm, the width is 40mm, and the height is 40 mm; the thickness of the bottom surface is 0.02 mm.

Preferably, the scale range of the vertical scale is 0-40mm, and the minimum step length is 1 mm; the scale range of the rotation angle display disc is 0-50 degrees, and the minimum step length is 1 degree.

Preferably, the groove is 2mm wide and 1mm deep, and the groove is 3mm from the bottom surface.

Compared with the prior art, the invention has the following beneficial effects:

the ultrasonic probe is arranged in the probe reserved opening of the upper end cover through the probe fixing device, and the extending depth and the rotating angle of the probe can be adjusted according to the detection requirement; the required liquid couplant is injected through the couplant injection port, and the liquid level can be observed in real time through the vertical graduated scale on the front side surface; the bottom surface of the device is placed on the tested insulating part, so that the device can be in seamless contact with the tested insulating parts with different curvatures, and stable and efficient transmission of ultrasonic waves is guaranteed. The invention can conveniently and efficiently carry out ultrasonic detection on the GIS insulators with different curvatures at low cost.

Drawings

FIG. 1 is a side view of a probe coupling device for ultrasonically detecting internal defects of a GIS insulator in the present embodiment;

FIG. 2 is a front view of a probe coupling device for ultrasonically detecting internal defects of a GIS insulator in the present embodiment;

FIG. 3 is a top view of the probe coupling device for ultrasonically detecting internal defects of a GIS insulator in the present embodiment;

fig. 4 is a schematic view of an upper end cap of a probe coupling device for ultrasonically detecting internal defects of a GIS insulator in the present embodiment; wherein, (a) is a schematic diagram of an upper end cover of the probe coupling device; (b) is a schematic view of a probe fixing device; (c) is a schematic view of a thin-wall clamp and a rotating shaft of the probe fixing device; (d) is a schematic view of a bracket of the probe fixing device;

fig. 5 is a schematic diagram of four side views of a probe coupling device for ultrasonically detecting internal defects of a GIS insulator in the present embodiment; wherein, (a) is a schematic front side view; (b) is a rear side schematic view; (c) is a schematic left side view; (d) is a right side schematic view;

FIG. 6 is a schematic diagram of the probe coupling device applied to ultrasonic testing of internal defects of small-curvature insulators in this embodiment; wherein, (a) is a schematic diagram of vertical short-distance detection of a probe; (b) a schematic diagram of vertical remote detection of the probe; (c) the detection schematic diagram of the probe rotating a certain angle is shown;

FIG. 7 is a schematic diagram of the probe coupling device applied to ultrasonic testing of internal defects of a large-curvature insulator in the present embodiment;

fig. 8 is a schematic view of the probe coupling device applied to ultrasonic testing of internal defects of a flat-plate-shaped insulating member in the present embodiment.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.