CN203572697U - Digital radiographic detection test block for point defects of disc insulator - Google Patents
Digital radiographic detection test block for point defects of disc insulator Download PDFInfo
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- CN203572697U CN203572697U CN201320499229.5U CN201320499229U CN203572697U CN 203572697 U CN203572697 U CN 203572697U CN 201320499229 U CN201320499229 U CN 201320499229U CN 203572697 U CN203572697 U CN 203572697U
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- disc insulator
- test block
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- spot defect
- digital radial
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Abstract
The utility model discloses a digital radiographic detection test block for point defects of a disc insulator. The digital radiographic detection test block for the point defects of the disc insulator is in a three-step blocky structure formed by mixing epoxy resin and alumina powder materials; the heights of the upper surfaces of three steps from the bottom up are 25-35mm, 55-65mm and 85-95mm respectively; and a plurality of flat-bottom holes in different hole diameters are formed in the upper surface of each step. According to the test block, the minimum detectable point defect of a detection system is determined by utilizing the difference of ray absorption dosages of the flat-bottom holes formed in different depths of surfaces of the steps and by observing the minimum detectable hole diameter of the point defects of the disc insulators having different thicknesses when the detection positions have different distances from an imaging plate, so that the detection sensitivity of the point defects of a digital radiographic detection system can be judged visually.
Description
Technical field
The utility model relates to a kind of disc insulator spot defect digital radial checkout equipment, relates in particular to a kind of GIS disc insulator spot defect digital radial and detects test block.
Background technology
GIS Chinese full name is metal-insulator metal enclosed switch, is the core component of modern power network.GIS parts are comprised of center conductor, operating parts, housing and disc insulator, and sulfur hexafluoride insulating gas is filled in inner space.Disc insulator adopts compound substance, after being stirred by epoxy resin and alumina powder mechanical mixture, and vacuum casting moulding in metal die.Disc insulator is benzvalene form structure, and central upper portion is inlayed cylindric center conductor, and lower basin is disc insulator and GIS cylindrical shell connecting portion along outstanding position.Between the general 60mm-90mm of 1000KV circuit disc insulator thickness, basin is high between 300mm-400mm; 500KV disc insulator thickness is generally between 40mm-70mm, and basin is high between 250mm-350mm; The following disc insulator thickness of 500KV is generally between 25mm-40mm, and basin is high between 200mm-300mm.Disc insulator is formed by epoxy resin and the casting of alumina powder mixing final vacuum, major defect is imperfect bonding between the stress rupture that causes of crackle, pore, snotter, insulation basin Density inhomogeneity and center cylindrical conductor and insulation basin, wherein, the defect such as pore, point-like inclusion belongs to spot defect.Because disc insulator is in operation, need to bear the impulsive force that stress that gaseous tension, temperature variation produce and mechanically actuated produce, above several defects all may cause the disc insulator discharge breakdown that is in operation, and cause whole piece line outage.Particularly the spot defect such as pore is because quantity is more, in technique, be difficult to control, the formed gas gap of spot defect will cause effluve, and the heat energy of discharge generation will cause disc insulator carbonization, cause Whole Equipment failure of insulation, cause serious industrial accident.
For fear of the industrial accident being caused by disc insulator spot defect, in disc insulator production run, need to detect the quality of disc insulator.Conventional disc insulator quality determining method is digital radial detection method.In digital radial detection method, digital radial imaging sensitivity critical parameter has 3, is respectively spatial resolution, pixel and density resolution.Spatial resolution is the least limit of the close region physical dimension (minor detail) that can recognize in digital picture, the namely resolution characteristic to image detail.Pixel is the minimum unit in flat panel detector digitalized image.Density resolution is the least limit that can recognize adjacent area density (or gray scale) difference in image visual field in image, i.e. the resolution characteristic of trickle density (gray scale) difference.Density resolution and spatial resolution are two aspects of resolving power index, and resolving power is also resolving power, distinguish the ability of two adjacent area images or image while being image forming medium imaging.This three aspects: joint effect disc insulator spot defect digital radial detection sensitivity.In actual production, need to test disc insulator spot defect digital radial detection sensitivity, verify the reliability that digital radial detection system spot defect detects.
Utility model content
The purpose of this utility model is to provide a kind of disc insulator spot defect digital radial and detects test block, in the test section distance of positions, the minimum detectable range during from imaging plate different distance goes out aperture to the spot defect that can test disc insulator different-thickness, can pass judgment on easily and intuitively digital radial detection system spot defect detection sensitivity.
The utility model adopts following technical proposals:
A kind of disc insulator spot defect digital radial detects test block, described disc insulator spot defect digital radial detects the three ladder block structures of test block for being made by aluminium oxide-epoxide resin material, the upper level of three ladders is respectively between 25mm-35mm, 55mm-65mm, 85mm-95mm from bottom to up, and each ladder upper surface is provided with the different flat-bottom hole in a plurality of apertures.
Described flat-bottom hole is centered close on cascaded surface cross central line, and the spacing of adjacent two flat-bottom holes is 10mm.
Described each ladder upper surface is provided with 6 flat-bottom holes, and the hole depth of each flat-bottom hole is identical with aperture, and the aperture of 6 flat-bottom holes is respectively 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm.
The described upper level of three ladders is from bottom to up respectively 30mm, 60mm and 90mm.
The width of three described ladders is 40mm, and length is 100mm.
Each 4mm place, flat-bottom hole edge of three described ladder block structures is provided with reference numbers.
Described reference numbers is font reference numbers.
The utility model utilization is arranged on the difference of the flat-bottom hole correlation line absorption dosage of stepped surfaces different depth, in the test section distance of positions, the minimum detectable range during from imaging plate different distance goes out aperture to disc insulator spot defect by observing different-thickness, determine the minimum spot defect that detection system can detect, thereby pass judgment on easily and intuitively digital radial detection system spot defect detection sensitivity.
Accompanying drawing explanation
Fig. 1 is the structural representation that disc insulator spot defect digital radial described in the utility model detects test block.
Embodiment
As shown in Figure 1, disc insulator spot defect digital radial described in the utility model detects the three ladder block structures of test block for being made by aluminium oxide-epoxide resin material, aluminium oxide-epoxide resin material is mixed by epoxy resin and alumina powder material, belongs to the known materials of this area.The width of three ladders is 40mm, and length is 100mm, and the upper level of three ladders is respectively between 25mm-35mm, 55mm-65mm, 85mm-95mm from bottom to up, and each ladder upper surface is provided with the different flat-bottom hole in a plurality of apertures 1; Flat-bottom hole 1 is centered close on cascaded surface cross central line, and the spacing of adjacent two flat-bottom holes 1 is 10mm, and each flat-bottom hole 1 4mm place, edge is provided with font reference numbers.In the present embodiment, each ladder upper surface is provided with 6 flat-bottom holes 1, the hole depth of each flat-bottom hole 1 is identical with aperture, and the aperture of 6 flat-bottom holes 1 is respectively 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, and the upper level of three ladders is respectively 30mm, 60mm and 90mm from bottom to up.
In carrying out digital radial detection, digital radial imaging sensitivity critical parameter has 3, is respectively spatial resolution, pixel, density resolution.Spot defect is during near imaging plate, and its density resolution is better, but spatial resolution is poorer; Otherwise when spot defect is during away from imaging plate, its spatial resolution is better, but density resolution is poorer.So, there is an appropriate distance, in this distance, spatial resolution and density resolution can be accepted, and make digital radial sensitivity reach best, and this distance is exactly the optimum distance in digital radial transillumination.By disc insulator spot defect digital radial, detect test block, install the support of different distance additional, the imaging sensitivity in the time of can testing spot defect Range Imaging plate different distance, thus determine optimum distance.
When using disc insulator spot defect digital radial detection test block described in the utility model to carry out disc insulator spot defect digital radial sensitivity detection, beam is vertically passed to test block, then by imaging device, receive and penetrate line formed image, utilize the difference of the flat-bottom hole 1 correlation line absorption dosage of different depth, in the test section distance of positions, the minimum detectable range during from imaging plate different distance goes out aperture to disc insulator spot defect by observing different-thickness, determine the minimum spot defect that detection system can detect, thereby pass judgment on easily and intuitively digital radial detection system spot defect detection sensitivity.
Claims (7)
1. a disc insulator spot defect digital radial detects test block, it is characterized in that: described disc insulator spot defect digital radial detects the three ladder block structures of test block for being made by aluminium oxide-epoxide resin material, the upper level of three ladders is respectively between 25mm-35mm, 55mm-65mm, 85mm-95mm from bottom to up, and each ladder upper surface is provided with the different flat-bottom hole in a plurality of apertures.
2. disc insulator spot defect digital radial according to claim 1 detects test block, it is characterized in that: described flat-bottom hole is centered close on cascaded surface cross central line, and the spacing of adjacent two flat-bottom holes is 10mm.
3. disc insulator spot defect digital radial according to claim 2 detects test block, it is characterized in that: described each ladder upper surface is provided with 6 flat-bottom holes, the hole depth of each flat-bottom hole is identical with aperture, and the aperture of 6 flat-bottom holes is respectively 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm.
4. disc insulator spot defect digital radial according to claim 3 detects test block, it is characterized in that: the described upper level of three ladders is from bottom to up respectively 30mm, 60mm and 90mm.
5. disc insulator spot defect digital radial according to claim 4 detects test block, it is characterized in that: the width of three described ladders is 40mm, and length is 100mm.
6. disc insulator spot defect digital radial according to claim 5 detects test block, it is characterized in that: each 4mm place, flat-bottom hole edge of three described ladder block structures is provided with reference numbers.
7. disc insulator spot defect digital radial according to claim 6 detects test block, it is characterized in that: described reference numbers is font reference numbers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499229.5U CN203572697U (en) | 2013-08-15 | 2013-08-15 | Digital radiographic detection test block for point defects of disc insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499229.5U CN203572697U (en) | 2013-08-15 | 2013-08-15 | Digital radiographic detection test block for point defects of disc insulator |
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| Publication Number | Publication Date |
|---|---|
| CN203572697U true CN203572697U (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320499229.5U Expired - Lifetime CN203572697U (en) | 2013-08-15 | 2013-08-15 | Digital radiographic detection test block for point defects of disc insulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439157A (en) * | 2013-08-15 | 2013-12-11 | 国家电网公司 | Test block for digital radiographic detection of disc insulator point defects and manufacturing method of test block |
-
2013
- 2013-08-15 CN CN201320499229.5U patent/CN203572697U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439157A (en) * | 2013-08-15 | 2013-12-11 | 国家电网公司 | Test block for digital radiographic detection of disc insulator point defects and manufacturing method of test block |
| CN103439157B (en) * | 2013-08-15 | 2016-04-27 | 国家电网公司 | A kind of disc insulator spot defect digital radial detects test block and method for making |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: Henan Electric Power Corporation Electric Power Science Research Institute |
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| TR01 | Transfer of patent right |
Effective date of registration: 20151013 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee after: HENAN ENPAI HIGH-TECH GROUP Co.,Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |