CN212693683U - Phased array probe structure suitable for composite insulator defect detection - Google Patents
Phased array probe structure suitable for composite insulator defect detection Download PDFInfo
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- CN212693683U CN212693683U CN202021617377.9U CN202021617377U CN212693683U CN 212693683 U CN212693683 U CN 212693683U CN 202021617377 U CN202021617377 U CN 202021617377U CN 212693683 U CN212693683 U CN 212693683U
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- array probe
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- 239000002131 composite material Substances 0.000 title claims abstract description 60
- 239000000523 sample Substances 0.000 title claims abstract description 59
- 239000012212 insulator Substances 0.000 title claims abstract description 58
- 230000007547 defect Effects 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 title abstract description 31
- 238000010168 coupling process Methods 0.000 abstract description 20
- 230000008878 coupling Effects 0.000 abstract description 16
- 238000005859 coupling reaction Methods 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 230000005540 biological transmission Effects 0.000 description 9
- 239000007822 coupling agent Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses a phased array probe structure suitable for composite insulator defect detection, include the phased array probe and install the sound-transparent voussoir on the phased array probe, sound-transparent voussoir with composite insulator's sheath cambered surface matches, sound-transparent voussoir's width less than or equal to composite insulator's full skirt interval. The phased array probe can realize good coupling between the phased array probe and the composite insulator under the condition that water is not used as a coupling medium, and further detect the interface debonding defect of the composite insulator sheath and the core rod.
Description
Technical Field
The utility model relates to a high voltage insulation technical field especially relates to a phased array probe structure suitable for composite insulator defect detection.
Background
The composite insulator has the advantages of light weight, high tensile strength, strong pollution resistance and the like, and is widely applied to a high-voltage power transmission system. Due to the influence of a manufacturing process, service life and an operating environment, the accident of the power transmission line caused by the brittle failure of the core rod caused by the internal defects of the composite insulator sometimes occurs. In order to ensure the safe operation of the transmission line, how to effectively detect the internal defects of the composite insulator, particularly on-site live detection, becomes a very much concerned problem for the power department.
The ultrasonic detection method mainly utilizes the influence of the composite material and the defects thereof on the propagation of ultrasonic waves to realize the detection of the internal defects of the detected material, and has the advantages of high sensitivity, strong penetrability, accurate defect positioning, high detection speed, low cost and the like. The conventional ultrasonic detection method has high requirements on the technical level of users and the field experience, and is difficult to popularize, the phased array detection technology is developed on the basis of the traditional ultrasonic detection technology, and the ultrasonic detection technology with the function of visualizing the image realizes the visualization of the defects of the sample. In the traditional ultrasonic detection method, water is used as a coupling medium to realize the coupling of the ultrasonic probe and the composite insulator. Whether sampling inspection in a laboratory or field detection of the composite insulator is carried out, water is adopted as a coupling medium, the method is not a good coupling method, hydrostatic coupling is adopted, if the composite insulator is placed in a water tank, corrosion of water on a sealing surface of the composite insulator can be caused by long-time soaking, so that potential damage of the composite insulator is caused, and the hydrostatic coupling is only suitable for detection in the laboratory and is not suitable for field detection; by adopting the flowing water coupling, on one hand, a water pumping device is needed, and a larger water quantity is also needed, so that if field detection is carried out, the insulation safety risk exists, and the field use is difficult.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a phased array probe structure suitable for composite insulator defect detection, which can realize good coupling between the phased array probe and the composite insulator without using water as a coupling medium.
In order to achieve the purpose, the following technical scheme is adopted in the application:
the utility model provides a phased array probe structure suitable for composite insulator defect detecting, includes the phased array probe and installs sound-transmitting wedge on the phased array probe, sound-transmitting wedge with composite insulator's sheath cambered surface matches, sound-transmitting wedge's width less than or equal to composite insulator's full skirt interval.
Specifically, the frequency of the phased array probe is 4-10Mhz, and the number of array elements is more than or equal to 32.
Specifically, the phased array probe and the sound-transmitting wedge are fastened and connected through a screw.
Specifically, the phased array probe adopts a self-focusing phased array probe.
Specifically, the acoustic wedge and the phased array probe are coupled through a coupling agent.
Specifically, the sound-transmitting wedge block is made of organic glass.
Specifically, the minimum thickness of the sound-transmitting wedge block is more than or equal to 2 times of the thickness of the composite insulator sheath.
The focusing curvature of the self-focusing phased array probe is 25 mm.
The minimum thickness of the sound-transmitting wedge is greater than or equal to 12 mm.
Compared with the prior art, the utility model discloses the beneficial effect who has lies in:
the utility model discloses can realize phased array probe and composite insulator's good coupling under the condition that does not regard water as coupling medium to it is poor to have avoided field test convenience among the conventional water coupling method, has insulating risk scheduling problem, can realize the field test to composite insulator.
In addition, the composite insulator does not need to be taken down during detection, and ultrasonic detection at each position of the composite insulator can be realized by rotating the phased array probe structure. Meanwhile, the composite insulators with different sizes and models can be detected by replacing the sound-transmitting wedges with different sizes.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is an isometric view of a phased array probe structure provided by an embodiment of the present invention;
fig. 2 is a main sectional view of a phased array probe structure provided by an embodiment of the present invention;
wherein: 1-controlling the array probe; 2-acoustically transparent wedges; 3-screws; 4-arc surface; 5-sound absorption glue; 6-sheath.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 and 2, a phased array probe structure suitable for composite insulator defect detection comprises a phased array probe 1 and an acoustic transmission wedge 2, wherein a probe end of the phased array probe 1 is fixedly mounted on an upper end face of the acoustic transmission wedge 2 through a screw 3, an arc face 4 matched with a sheath 6 of a composite insulator is formed at a lower end face of the acoustic transmission wedge 2, so that the acoustic transmission wedge 2 is inserted between sheds of the composite insulator to detect a core rod, and the width of the acoustic transmission wedge 2 is smaller than or equal to the shed distance of the composite insulator.
The embodiment can realize good coupling of the phased array probe and the composite insulator under the condition that water is not used as a coupling medium, thereby avoiding the problems of poor convenience, insulating risk and the like of field detection in the conventional water coupling method, and realizing the field detection of the composite insulator. In addition, the composite insulator does not need to be taken down during detection, and ultrasonic detection at each position of the composite insulator can be realized by rotating the sound-transmitting wedge block 2. Meanwhile, the composite insulators with different sizes and models can be detected by replacing the sound-transmitting wedge blocks 2 with different sizes.
It can be understood that after the sound-transmitting wedge block 2 is coupled with the composite insulator, the gap between the sound-transmitting wedge block 2 and the side umbrella skirt is less than or equal to 0.5mm, and after the arrangement, when the sound-transmitting wedge block 2 is clamped on the sheath of the core rod, the sheath between the adjacent umbrella skirts can be basically covered, so that the detection speed can be improved.
Specifically, in actual operation, the frequency of the phased array probe 1 is 4-10Mhz, the number of array elements is greater than or equal to 32, the sound-transmitting wedge 2 can be made of organic glass, and the minimum thickness of the sound-transmitting wedge 2 is greater than or equal to 2 times the thickness of a sheath of the detected composite insulator, so that the problem that wedge reflected waves interfere with defective reflected waves of the detected composite insulator is solved.
In practical design, the wafer of the phased array probe 1 is made of a composite material, the crystal plane of the phased array probe 1 is an arc surface, the phased array probe 1 has a self-focusing function (a self-focusing phased array probe), in this embodiment, the curvature of the crystal plane of the probe is R25, and correspondingly, the focusing depth is 18 mm. Correspondingly, the upper end face of the sound-transmitting wedge block 2 is designed into an arc-shaped contact face matched with the crystal face of the phased array probe 1, namely the sound-transmitting wedge block 2 is an arc-shaped wedge block, when the arc-shaped wedge block is an arc-shaped block body with the same thickness, the curvature radius of the arc-shaped wedge block can be controlled to be 20-40mm, and the curvature radius is matched with the curvature radius of a sheath of the composite insulator core rod to be detected.
Referring to fig. 1 and 2, specifically, the sound-transmitting wedge 2 is coupled with the phased array probe 1 through a general coupling agent, and the side of the sound-transmitting wedge 2 is coated with a sound-absorbing glue 5, so as to prevent a situation that a defect reflected wave of a detected composite insulator is interfered by a reflected wave of the end face of the wedge.
Referring to fig. 1 and 2, a composite insulator defect phased array detection method specifically includes the steps of:
step 1: selecting a proper sound-transmitting wedge block 2 according to the outer diameter of the composite insulator to be detected, wherein after the sound-transmitting wedge block 2 is coupled with a sheath 6 of a composite insulator core rod, the gap between two end parts is less than or equal to 0.5 mm;
step 2: installing an acoustic-transparent wedge block 2 on a phased array probe 1, and coupling the acoustic-transparent wedge block 2 with a phased array crystal face of the phased array probe 1 by adopting a general coupling agent;
and step 3: coating aqueous polymer gel as a coupling agent on the surface of the composite insulator; the sound-transmitting wedge block 2 is tightly pressed on the outer surface of the sheath of the composite insulator core rod, and sound wave energy is introduced into the composite insulator through the couplant.
And 4, step 4: by adopting the set of probe and the sound-transmitting wedge block 2, the composite insulator does not need to be taken down during detection, circumferential scanning can be carried out on the composite insulator through circumferential rotation, and the composite insulator ultrasonic detection with high sensitivity, strong penetrability and accurate defect positioning is realized.
This application adopts conventional supersound couplant, like the lipid, can realize probe and composite insulator's good coupling to the field test convenience is poor among the conventional water coupling method has been avoided, there is insulating risk scheduling problem. After sound waves enter the composite insulator from the probe, the reflected echo sound intensity of the defect part is lower than that of the intact part, and the reflected echo sound intensity and the echo sound intensity are obviously different, so that the reflected echo sound intensity can be used as a criterion for judging whether the debonding defect exists on the interface of a sheath and a core rod of the composite insulator, and the method is specific:
when the defect width is 1mm, the echo sound intensity of the defect part is 40% of that of the intact part; when the defect width is 2mm, the echo sound intensity of the defect part is 20% of that of the intact part; when the defect width is 3mm, the echo sound intensity of the defect part is 3% of that of the intact part.
The probe structure can be used for quality detection of composite insulators in laboratories and manufacturing factories, and can also be used for field detection of composite insulators on high-voltage transmission lines in operation.
The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (7)
1. The utility model provides a phased array probe structure suitable for composite insulator defect detecting, includes phased array probe (1) and installs sound-transparent voussoir (2) on phased array probe (1), its characterized in that: the sound-transmitting wedge block (2) is matched with the cambered surface of the sheath (6) of the composite insulator, and the width of the sound-transmitting wedge block (2) is smaller than or equal to the distance between the sheds of the composite insulator.
2. The phased array probe structure of claim 1, wherein: the phased array probe (1) adopts a self-focusing phased array probe.
3. The phased array probe structure of claim 2, wherein: the focusing curvature of the self-focusing phased array probe is 25 mm.
4. The phased array probe structure according to claim 1 or 2, characterized in that: the minimum thickness of the sound-transmitting wedge (2) is more than or equal to 2 times the thickness of the sheath (6).
5. The phased array probe structure of claim 4, wherein: the minimum thickness of the sound-transmitting wedge block (2) is more than or equal to 12 mm.
6. The phased array probe structure according to claim 1 or 2, characterized in that: the frequency of the phased array probe is 4-10Mhz, and the number of array elements is more than or equal to 32.
7. The phased array probe structure according to claim 1 or 2, characterized in that: the phased array probe (1) is fixedly connected with the sound-transmitting wedge block (2) through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021617377.9U CN212693683U (en) | 2020-08-06 | 2020-08-06 | Phased array probe structure suitable for composite insulator defect detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021617377.9U CN212693683U (en) | 2020-08-06 | 2020-08-06 | Phased array probe structure suitable for composite insulator defect detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212693683U true CN212693683U (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021617377.9U Active CN212693683U (en) | 2020-08-06 | 2020-08-06 | Phased array probe structure suitable for composite insulator defect detection |
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| Country | Link |
|---|---|
| CN (1) | CN212693683U (en) |
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2020
- 2020-08-06 CN CN202021617377.9U patent/CN212693683U/en active Active
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