CN201273893Y - Ultrasonic wave flaw detection test block for column porcelain insulator - Google Patents
Ultrasonic wave flaw detection test block for column porcelain insulator Download PDFInfo
- Publication number
- CN201273893Y CN201273893Y CNU2008201060387U CN200820106038U CN201273893Y CN 201273893 Y CN201273893 Y CN 201273893Y CN U2008201060387 U CNU2008201060387 U CN U2008201060387U CN 200820106038 U CN200820106038 U CN 200820106038U CN 201273893 Y CN201273893 Y CN 201273893Y
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- test block
- porcelain insulator
- coating
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- dope layer
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 229910052573 porcelain Inorganic materials 0.000 title claims abstract description 33
- 239000012212 insulator Substances 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 title abstract description 3
- 239000011248 coating agent Substances 0.000 claims abstract description 32
- 238000000576 coating method Methods 0.000 claims abstract description 32
- 230000007547 defect Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 9
- 239000011247 coating layer Substances 0.000 abstract 3
- 238000013016 damping Methods 0.000 description 4
- 238000002604 ultrasonography Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model relates to an ultrasonic examination test block of a support porcelain insulator, which belongs to a standard reference test block. The ultrasonic examination test block comprises a cylindrical test block, and four radial artificial defects with the cutting depth being of 1 mm, 3 mm, 5 mm and 7 mm respectively are uniformly arranged on an identical periphery at the middle part of the cylindrical test block; and the ultrasonic examination test block is characterized in that a first coating layer and a second coating layer are respectively coated on cylindrical surfaces on the left side and the right side bounded by the four artificial defects, and the thickness of the first coating is smaller than that of the second coating layer. The ultrasonic examination test block has the advantages that the test block has a reflector which is stated in the prior working standard, and can ensure the support porcelain insulator with RTV coating being coated to perform the wave creeping and fault detection operation.
Description
Technical field
The utility model relates to the test block of a kind of pillar porcelain insulator UT (Ultrasonic Testing), belongs to the standard reference block.
Background technology
The pillar porcelain insulator UT (Ultrasonic Testing) reference block of using at present mainly is to adopt to make with the material of the identical acoustical behavior of high-voltage strut porcelain insulator, be divided into two kinds, two kinds of high-strength porcelain and ordinary porcelains, physical dimension is identical, in order to detecting the high-voltage strut porcelain insulator of different materials.It has good effect for detecting the pillar porcelain insulator that is not coated with RTV coating.But because the substation that has at present all scribbles RTV coating with pillar porcelain insulator, as adopts original test block to compare, then need coating is wiped off, this work needs a large amount of manpower and materials.
As follows to pillar porcelain insulator UT (Ultrasonic Testing) standard common test block characteristic analysis:
As in the North China grid company company standard " high-voltage strut porcelain insulator ultrasound examination guide rule " being about the standard reference block:
The test block employing is made with the material of the identical acoustical behavior of high-voltage strut porcelain insulator.Be divided into two kinds of high-strength porcelain and ordinary porcelains, physical dimension is identical, in order to detecting the high-voltage strut porcelain insulator of different materials.
For resize ratio, sensitivity, test block should meet the following requirements:
A) test block surface or inside do not have defective, and internal organizational structure is even, and attenuation coefficient is medium, and grain size is medium.
B) test block physical dimension is 100 * 300mm right cylinder, and its middle part has depth of cut to be respectively the artificial defect of 1mm, 3mm, 5mm, 7mm.Because the surface is not coated with RTV coating, can not compensate at the pillar porcelain insulator table and scribble the influence that RTV coating brings to flaw detection.
Summary of the invention
Technical problem to be solved in the utility model provide a kind of can satisfy detect the pillar porcelain insulator UT (Ultrasonic Testing) test block that the surface scribbles the pillar porcelain insulator of RTV coating.
The technical scheme that its technical matters that solves the utility model adopts:
The utility model includes the right cylinder test block, on the same periphery at right cylinder test block middle part, be evenly equipped with 4 radially, depth of cut is respectively the artificial defect of 1mm, 3mm, 5mm, 7mm; Scribble first dope layer and second dope layer respectively on the face of cylinder of the right and left that to it is characterized in that with described 4 artificial defects be the boundary, the thickness of first dope layer is less than the thickness of second dope layer.
The diameter of described right cylinder test block is 100mm, and length is 300mm; The material of described right cylinder test block is high-strength porcelain or ordinary porcelain.
Described coating adopts PTV coating.
The thickness L1=0.44mm of described first dope layer, the thickness L2=0.51mm of described second dope layer.
The beneficial effects of the utility model are reflecting bodys that this test block has regulation test block in the present working standard, can satisfy the pillar porcelain insulator that scribbles RTV coating and climb wave inspection work.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the existing structural representation that does not scribble the pillar porcelain insulator ultrasonic test block of PTV coating.
Wherein: Fig. 2 (a) is a front view.
Fig. 2 (b) is a left view.
Fig. 2 (c) is a vertical view.
Fig. 2 (d) is a upward view.
Fig. 2 (e) is a rear view.
In Fig. 1,2,1 right cylinder test block, 2 first dope layers, 3 depths of cut are that artificial defect, 4 second dope layers, 5 depths of cut of 7mm are that the artificial defect of 3mm, artificial defect, 7 depths of cut that 6 depths of cut are 5mm are the artificial defect of 1mm.
Embodiment
By embodiment shown in Figure 1 as can be known, it includes right cylinder test block 1, on the same periphery at right cylinder test block 1 middle part, be evenly equipped with 4 radially, depth of cut is respectively the artificial defect of 1mm, 3mm, 5mm, 7mm; Scribble the thickness of the thickness of first dope layer 2 and second dope layer, 4, the first dope layers 2 respectively on the face of cylinder of the right and left that to it is characterized in that with described 4 artificial defects be the boundary less than second dope layer 4.
The diameter of described right cylinder test block 1 is 100mm, and length is 300mm; The material of described right cylinder test block 1 is high-strength porcelain or ordinary porcelain.
Described coating adopts PTV coating.
The thickness L1=0.44mm of described first dope layer 2, the thickness L2=0.51mm of described second dope layer 4.
Principle of work of the present utility model can compensate owing to the pillar porcelain insulator surface scribbles the decay that PTV coating causes for owing to scribble first and second PTV dope layer 2,4 in right cylinder test block 1.
Rationale of the present utility model is as follows:
By the transmission ultrasonic wave formula as can be known:
In the formula: t is a transmissivity
Z
1It is the acoustic impedance of first kind of medium;
Z
2The acoustic impedance of second kind of medium.
Hence one can see that, the acoustic impedance difference of (on the ultrasonic probe), coating, pottery because glass, and when compressional wave imported in the pottery, its energy had certain decay, and its damping capacity is certain; Hence one can see that, can be by in the standard reference block, being coated with last layer RTV coating, can solve it owing to passing the damping capacity that different medium causes, and both are consistent on degree.
Another factor that influences its damping capacity is exactly the thickness L of coating, and the thickness of test block surface RTV coating determines that method is as follows:
According to the power industry standard DL/T627-2004 of the People's Republic of China (PRC) " insulator with normal temperature cure silicon rubber antifouling flush paint " requirement, at the thickness of the RTV coating that scribbles on the pillar porcelain insulator between 0.4～0.5mm.Because coating is solid rubbery material, be about 1100m/s through its inner longitudinal wave propagation velocity of sound of check.
According to the ultrasound wave creeping wave probe as can be known, its incident compressional angle is 24.8 °, incide in the coating after, according to following formula (1):
C
LBe the first medium longitudinal wave velocity; C
SBe the second medium longitudinal wave velocity.
θ
LIt is the first medium incident angle; θ
SIt is the second medium compressional wave refraction angle.
Because the velocity of propagation of compressional wave in glass be 2730m/s, the above-mentioned formula of substitution (1) as can be known, the compressional wave refraction angle is 9.73 ° in coating.If its thickness of coating is L, then the distance of longitudinal wave propagation is D in coating:
With paint thickness 0.4～0.5mm substitution as can be known, the distance of propagating in the coating is 0.41～0.51mm;
Pass the transmitting formula of different medium by ultrasound wave:
In the formula: t is hyperacoustic transmissivity, and d2 is the thickness of coating, λ 2 for the wavelength of sonic propagation in the coating (by its computing formula as can be known its wavelength be 0.44mm), m is the two media acoustic impedance, this can find according to data.m＝Z1/Z2。By following formula as can be known when L1=0.44mm (promptly just in time being the wavelength of compressional wave among the RTV), transmissivity t maximum, decay was minimum when this moment, ultrasound wave was by coating.
As can be known when thickness during at L2=0.51mm, the time its transmissivity minimum, compressional wave passes the damping capacity maximum that coating causes, can consider for this reason and will either way accomplish above the test block.
Claims (4)
1, pillar porcelain insulator UT (Ultrasonic Testing) test block, it includes right cylinder test block (1), on the same periphery at right cylinder test block (1) middle part, be evenly equipped with 4 radially, depth of cut is respectively the artificial defect of 1mm, 3mm, 5mm, 7mm; Scribble first dope layer (2) and second dope layer (4) respectively on the face of cylinder of the right and left that to it is characterized in that with described 4 artificial defects be the boundary, the thickness of first dope layer (2) is less than the thickness of second dope layer (4).
2, pillar porcelain insulator UT (Ultrasonic Testing) according to claim 1 test block, the diameter that it is characterized in that described right cylinder test block (1) is 100mm, length is 300mm; The material of described right cylinder test block (1) is high-strength porcelain or ordinary porcelain.
3, pillar porcelain insulator UT (Ultrasonic Testing) according to claim 2 test block is characterized in that described coating adopts PTV coating.
4, pillar porcelain insulator UT (Ultrasonic Testing) according to claim 3 test block is characterized in that the thickness L1=0.44mm of described first dope layer (2), the thickness L2=0.51mm of described second dope layer (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201060387U CN201273893Y (en) | 2008-09-26 | 2008-09-26 | Ultrasonic wave flaw detection test block for column porcelain insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201060387U CN201273893Y (en) | 2008-09-26 | 2008-09-26 | Ultrasonic wave flaw detection test block for column porcelain insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201273893Y true CN201273893Y (en) | 2009-07-15 |
Family
ID=40884240
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201060387U Expired - Fee Related CN201273893Y (en) | 2008-09-26 | 2008-09-26 | Ultrasonic wave flaw detection test block for column porcelain insulator |
Country Status (1)
| Country | Link |
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| CN (1) | CN201273893Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818858A (en) * | 2012-08-23 | 2012-12-12 | 中国神华能源股份有限公司 | Comparison test block for creeping wave fault detection |
| CN103424417A (en) * | 2013-08-15 | 2013-12-04 | 国家电网公司 | Digital radiographic testing block for planar defects of basin-type insulators and production method |
| CN106153735A (en) * | 2016-06-21 | 2016-11-23 | 中国飞机强度研究所 | A kind of fatigue crack manual simulation method of bolt reference block |
-
2008
- 2008-09-26 CN CNU2008201060387U patent/CN201273893Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818858A (en) * | 2012-08-23 | 2012-12-12 | 中国神华能源股份有限公司 | Comparison test block for creeping wave fault detection |
| CN103424417A (en) * | 2013-08-15 | 2013-12-04 | 国家电网公司 | Digital radiographic testing block for planar defects of basin-type insulators and production method |
| CN103424417B (en) * | 2013-08-15 | 2016-03-02 | 国家电网公司 | A kind of disc insulator planar defect digital radial detects test block and method for making |
| CN106153735A (en) * | 2016-06-21 | 2016-11-23 | 中国飞机强度研究所 | A kind of fatigue crack manual simulation method of bolt reference block |
| CN106153735B (en) * | 2016-06-21 | 2019-04-23 | 中国飞机强度研究所 | A kind of fatigue crack manual simulation's method of bolt reference block |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. HEBEI ELECTRIC POWER CONS Effective date: 20130326 Owner name: HEBEI ELECTRIC POWER CORPORATION ELECTRIC POWER RE Free format text: FORMER OWNER: HEBEI ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20130326 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130326 Address after: 050021 Shijiazhuang Province, Yuhua Province Sports street, South Street, No. 238, No. Patentee after: Electric Power Research Institute of Hebei Electric Power Corporation Patentee after: State Grid Corporation of China Patentee after: Hebei Electric Power Construction & Adjustment Research Institute Address before: 050021 No. 238 South Sports street, Hebei, Shijiazhuang Patentee before: Hebei Electric Power Research Institute |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 Termination date: 20150926 |
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| EXPY | Termination of patent right or utility model |