CN103424418A - Digital radiographic testing block for linear defects of basin-type insulators and production method - Google Patents
Digital radiographic testing block for linear defects of basin-type insulators and production method Download PDFInfo
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- CN103424418A CN103424418A CN2013103560142A CN201310356014A CN103424418A CN 103424418 A CN103424418 A CN 103424418A CN 2013103560142 A CN2013103560142 A CN 2013103560142A CN 201310356014 A CN201310356014 A CN 201310356014A CN 103424418 A CN103424418 A CN 103424418A
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Abstract
The invention discloses a digital radiographic testing block for linear defects of basin-type insulators. The digital radiographic testing block is of a cuboid blocky structure, with the height of 55-65mm, made of epoxy resin and alumina powder by mixing; two metal wires and a plurality of through holes penetrating the cuboid blocky structure and different in hole diameter are horizontally and parallelly arranged in a same plane 15-25mm distant from the upper surface of the cuboid blocky structure; lengths of the metal wires are not smaller than the width of the cuboid blocky structure, and the metal wires are respectively a copper wire and a steel wire 0.1mm in diameter. Minimum linear defect which can be tested by a testing system is determined by the aid of differences, in ray absorption doses, of the through holes different in hole diameter and formed in the surfaces of steps, and by means of observing minimum testable wire diameter during different distances from the linear defects, different in thickness, of the basin-type insulators at the testing position to an imaging plate, so that linear defect testing flexibility of a digital radiographic testing system is judged intuitively.
Description
Technical field
The present invention relates to a kind of disc insulator line defect digital radial checkout equipment, relate in particular to a kind of GIS disc insulator line defect digital radial and detect test block and method for making.
Background technology
GIS Chinese full name is the metal-insulator metal enclosed switch, is the core component of modern power network.The GIS parts are comprised of center conductor, operating parts, housing and disc insulator, and the 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 the 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 defects such as copper wire, iron wire snotter and wire hole belong to line defect.Need to bear because disc insulator is in operation 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 the whole piece line outage.The line defect particularly occurred in manufacture process will produce expansion under impact force action, the basin that causes insulating cracking, the gas gap that cracking forms can cause effluve, and the heat energy of discharge generation will cause the disc insulator carbonization, cause the Whole Equipment failure of insulation, cause serious industrial accident.
For fear of the industrial accident caused by the disc insulator line defect, in the disc insulator production run, need to the quality of disc insulator be detected.Disc insulator quality determining method commonly used is the digital radial detection method.In the 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, namely to the resolution characteristic of image detail.Pixel is the minimum unit in the flat panel detector digitalized image.Density resolution is the least limit that can recognize adjacent area density (or gray scale) difference in the 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 also is resolving power, distinguish the ability of two adjacent area images or image while being the image forming medium imaging.This three aspects: joint effect disc insulator line defect digital radial detection sensitivity.In actual production, need to be tested disc insulator line defect digital radial detection sensitivity, be verified the reliability that digital radial detection system line defect detects.
Summary of the invention
The purpose of this invention is to provide a kind of disc insulator line defect digital radial and detect test block and method for making, in the test section distance of positions, the minimum detectable range during from the imaging plate different distance goes out wire diameter to the line defect that can test the disc insulator different-thickness, can pass judgment on easily and intuitively digital radial detection system line defect detection sensitivity.
The present invention adopts following technical proposals:
A kind of disc insulator line defect digital radial detects the described disc insulator line defect of test block digital radial and detects the rectangular parallelepiped block structure of test block for being mixed by epoxy resin and alumina powder material, rectangular parallelepiped block structure height is 55mm-65mm, on the same plane at distance rectangular parallelepiped block structure upper surface 15mm-25mm place, horizontal parallel is provided with two one metal wires and a plurality of different through holes of rectangular parallelepiped block structure and aperture that run through, two one metal wire length are not less than the width of rectangular parallelepiped block structure, and two one metal wires are respectively copper wire and steel wire that diameter is 0.1mm.
Be provided with six through holes that run through on described rectangular parallelepiped block structure, and the aperture of six through holes is respectively 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm and 1.2mm.
The high 60mm of described rectangular parallelepiped block structure, wide 40mm, long 100mm.
Described two one metal wires and six through holes are arranged on the same plane apart from rectangular parallelepiped block structure upper surface 20mm place.
Described two one metal wires and six through-hole spacing 10mm be arranged in parallel.
A kind of disc insulator line defect digital radial detects the method for making of test block, comprises the following steps:
A: rectangular parallelepiped casting die inside is cleaned, vacuumized after drying;
B: epoxy resin and alumina powder material are evenly mixed to rear heating, pour in the rectangular parallelepiped casting die by rectangular parallelepiped casting die spout;
C: on distance rectangular parallelepiped casting die inside upper surface 15mm-25mm place same plane, horizontal parallel arranges many one metal wires, tinsel length is not less than the inboard width of rectangular parallelepiped casting die, and tinsel comprises the copper wire that a diameter is 0.1mm, steel wire and the some tinsels that scribble in advance release agent that diameter is different that diameter is 0.1mm;
D: carry out twice curing molding after having cast, obtain the rectangular parallelepiped block structure after the demoulding; The tinsel that will be coated with again release agent is extracted out, forms the different through hole that runs through the rectangular parallelepiped block structure in several apertures;
E: utilize lathe or grinding machine six surfaces of rectangular parallelepiped block structure that repair a die, and will on the rib of rectangular parallelepiped block structure, make chamfering.
In described C step, the six roots of sensation wire surface that diameter is respectively 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm and 1.2mm scribbles release agent in advance.
In described C step, rectangular parallelepiped casting die inner high 60mm, wide 40mm, long 100mm.
In described C step, eight one metal wire horizontal parallel are arranged on apart from rectangular parallelepiped casting die inside upper surface 20mm place same plane.
In described C step, eight one metal wire spacing 10mm be arranged in parallel.
Utilization of the present invention is arranged on the difference of stepped surfaces different pore size through hole correlation line absorption dosage, in the test section distance of positions, the minimum detectable range during from the imaging plate different distance goes out wire diameter to disc insulator line defect by observing different-thickness, determine the minimum line defect that detection system can detect, thereby pass judgment on easily and intuitively digital radial detection system line defect detection sensitivity.
The accompanying drawing explanation
Fig. 1 is the structural representation that disc insulator line defect digital radial of the present invention detects test block.
Embodiment
As shown in Figure 1, disc insulator line defect digital radial of the present invention detects the rectangular parallelepiped block structure 1 of test block for being mixed by epoxy resin and alumina powder material, rectangular parallelepiped block structure 1 is highly 55mm-65mm, on the same plane at distance rectangular parallelepiped block structure 1 upper surface 15mm-25mm place, horizontal parallel is provided with two one metal wires and a plurality of different through holes 4 of rectangular parallelepiped block structure 1 and aperture that run through, two one metal wire length are not less than the width of rectangular parallelepiped block structure 1, and two one metal wires are respectively copper wire 2 and steel wire 3 that diameter is 0.1mm.In the present embodiment, the high 60mm of rectangular parallelepiped block structure 1, wide 40mm, long 100mm, be provided with six through holes that run through 4 on rectangular parallelepiped block structure 1, and the aperture of six through holes 4 is respectively 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm and 1.2mm.Two one metal wires and six through hole 4 spacing 10mm are set in parallel on the same plane apart from rectangular parallelepiped block structure 1 upper surface 20mm place.
Disc insulator line defect digital radial of the present invention detects the method for making of test block, comprises the following steps:
A: rectangular parallelepiped casting die inside is cleaned, vacuumized after drying;
B: epoxy resin and alumina powder material are evenly mixed to rear heating, pour in the rectangular parallelepiped casting die by rectangular parallelepiped casting die spout;
C: on distance rectangular parallelepiped casting die inside upper surface 15mm-25mm place same plane, horizontal parallel arranges many one metal wires, tinsel length is not less than the inboard width of rectangular parallelepiped casting die, and tinsel comprises copper wire that a diameter is 0.1mm 2, the steel wire that diameter is 0.1mm 3 and the some tinsels that scribble in advance release agent that diameter is different;
D: carry out twice curing molding after having cast, obtain rectangular parallelepiped block structure 1 after the demoulding; The tinsel that will be coated with again release agent is extracted out, forms the different through hole that runs through rectangular parallelepiped block structure 14 in several apertures;
E: utilize lathe or grinding machine six surfaces of rectangular parallelepiped block structure 1 that repair a die, and will on the rib of rectangular parallelepiped block structure 1, make chamfering.
In the present embodiment, rectangular parallelepiped casting die inner high 60mm, wide 40mm, long 100mm, eight one metal wire level interval 10mm are set in parallel in apart from rectangular parallelepiped casting die inside upper surface 20mm place same plane.The six roots of sensation wire surface that diameter is respectively 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm and 1.2mm scribbles release agent in advance, and this six roots of sensation tinsel will form six through holes that run through rectangular parallelepiped block structure 14 that aperture is different after extracting rectangular parallelepiped block structure 1 out.
In carrying out the digital radial detection, digital radial imaging sensitivity critical parameter has 3, is respectively spatial resolution, pixel, density resolution.During the close imaging plate of line defect, its density resolution is better, but spatial resolution is poorer; Otherwise during away from imaging plate, its spatial resolution is better when line defect, but density resolution is poorer.So, there is an appropriate distance, on this distance, space resolution and density resolution can be accepted, and make digital radial sensitivity reach best, and this distance is exactly the optimum distance in the digital radial transillumination.Detect test block by disc insulator line defect digital radial, install the support of different distance additional, the imaging sensitivity in the time of can testing line defect Range Imaging plate different distance, thus determine optimum distance.
When using disc insulator line defect digital radial detection test block of the present invention to carry out disc insulator line defect digital radial sensitivity detection, beam is vertically passed to test block, then receive ray by imaging device and form image, utilize the difference of the through hole 4 correlation line absorption dosage of different pore size, in the test section distance of positions, the minimum detectable range during from the imaging plate different distance goes out wire diameter to disc insulator line defect by observing different-thickness, determine the minimum line defect that detection system can detect, thereby pass judgment on easily and intuitively digital radial detection system line defect detection sensitivity.
Claims (10)
1. a disc insulator line defect digital radial detects test block, it is characterized in that: described disc insulator line defect digital radial detects the rectangular parallelepiped block structure of test block for being mixed by epoxy resin and alumina powder material, rectangular parallelepiped block structure height is 55mm-65mm, on the same plane at distance rectangular parallelepiped block structure upper surface 15mm-25mm place, horizontal parallel is provided with two one metal wires and a plurality of different through holes of rectangular parallelepiped block structure and aperture that run through, two one metal wire length are not less than the width of rectangular parallelepiped block structure, and two one metal wires are respectively copper wire and steel wire that diameter is 0.1mm.
2. disc insulator line defect digital radial according to claim 1 detects test block, it is characterized in that: be provided with six through holes that run through on described rectangular parallelepiped block structure, and the aperture of six through holes is respectively 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm and 1.2mm.
3. disc insulator line defect digital radial according to claim 2 detects test block, it is characterized in that: the high 60mm of described rectangular parallelepiped block structure, wide 40mm, long 100mm.
4. disc insulator line defect digital radial according to claim 3 detects test block, and it is characterized in that: described two one metal wires and six through holes are arranged on the same plane apart from rectangular parallelepiped block structure upper surface 20mm place.
5. disc insulator line defect digital radial according to claim 4 detects test block, and it is characterized in that: described two one metal wires and six through-hole spacing 10mm be arranged in parallel.
6. the method for making of a disc insulator line defect digital radial detection test block, is characterized in that, comprises the following steps:
A: rectangular parallelepiped casting die inside is cleaned, vacuumized after drying;
B: epoxy resin and alumina powder material are evenly mixed to rear heating, pour in the rectangular parallelepiped casting die by rectangular parallelepiped casting die spout;
C: on distance rectangular parallelepiped casting die inside upper surface 15mm-25mm place same plane, horizontal parallel arranges many one metal wires, tinsel length is not less than the inboard width of rectangular parallelepiped casting die, and tinsel comprises the copper wire that a diameter is 0.1mm, steel wire and the some tinsels that scribble in advance release agent that diameter is different that diameter is 0.1mm;
D: carry out twice curing molding after having cast, obtain the rectangular parallelepiped block structure after the demoulding; The tinsel that will be coated with again release agent is extracted out, forms the different through hole that runs through the rectangular parallelepiped block structure in several apertures;
E: utilize lathe or grinding machine six surfaces of rectangular parallelepiped block structure that repair a die, and will on the rib of rectangular parallelepiped block structure, make chamfering.
7. disc insulator line defect digital radial according to claim 6 detects the method for making of test block, it is characterized in that: in described C step, the six roots of sensation wire surface that diameter is respectively 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm and 1.2mm scribbles release agent in advance.
8. disc insulator line defect digital radial according to claim 7 detects the method for making of test block, it is characterized in that: in described C step, and rectangular parallelepiped casting die inner high 60mm, wide 40mm, long 100mm.
9. disc insulator line defect digital radial according to claim 8 detects the method for making of test block, it is characterized in that: in described C step, eight one metal wire horizontal parallel are arranged on apart from rectangular parallelepiped casting die inside upper surface 20mm place same plane.
10. disc insulator line defect digital radial according to claim 8 detects the method for making of test block, and it is characterized in that: in described C step, eight one metal wire spacing 10mm be arranged in parallel.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108195856A (en) * | 2017-12-07 | 2018-06-22 | 北京星航机电装备有限公司 | A kind of increasing material manufacturing material industry CT detection sensitivity test methods |
| CN108459343A (en) * | 2017-12-19 | 2018-08-28 | 成都飞机工业（集团）有限责任公司 | A kind of beam angle measurement method |
| CN109855938A (en) * | 2019-03-29 | 2019-06-07 | 国网河南省电力公司电力科学研究院 | A kind of detection test block of disc insulator digital radial and detection method |
| CN111879799A (en) * | 2020-07-03 | 2020-11-03 | 中国兵器科学研究院宁波分院 | Manual testing method for spatial resolution of optical system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195856A (en) * | 2017-12-07 | 2018-06-22 | 北京星航机电装备有限公司 | A kind of increasing material manufacturing material industry CT detection sensitivity test methods |
| CN108459343A (en) * | 2017-12-19 | 2018-08-28 | 成都飞机工业（集团）有限责任公司 | A kind of beam angle measurement method |
| CN108459343B (en) * | 2017-12-19 | 2021-11-30 | 成都飞机工业（集团）有限责任公司 | Ray bundle angle testing method |
| CN109855938A (en) * | 2019-03-29 | 2019-06-07 | 国网河南省电力公司电力科学研究院 | A kind of detection test block of disc insulator digital radial and detection method |
| CN111879799A (en) * | 2020-07-03 | 2020-11-03 | 中国兵器科学研究院宁波分院 | Manual testing method for spatial resolution of optical system |
| CN111879799B (en) * | 2020-07-03 | 2022-08-26 | 中国兵器科学研究院宁波分院 | Manual testing method for spatial resolution of optical system |
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Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee after: State Grid Corporation of China Co-patentee after: Henan jiuyu enpai Power Technology Co.,Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee before: State Grid Corporation of China Co-patentee before: HENAN ENPAI HIGH-TECH GROUP Co.,Ltd. |
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