CN103728375B - GIS end flange and cylindrical shell fillet weld apparatus for evaluating and nondestructive evaluation method thereof - Google Patents
GIS end flange and cylindrical shell fillet weld apparatus for evaluating and nondestructive evaluation method thereof Download PDFInfo
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- CN103728375B CN103728375B CN201410014404.6A CN201410014404A CN103728375B CN 103728375 B CN103728375 B CN 103728375B CN 201410014404 A CN201410014404 A CN 201410014404A CN 103728375 B CN103728375 B CN 103728375B
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Abstract
The invention discloses a kind of gas insulated switchgear end flange and cylindrical shell fillet weld apparatus for evaluating and nondestructive evaluation method thereof.Existing detection method effectively can not solve the nondestructive evaluation problem of GIS end flange and cylindrical shell fillet weld.The invention is characterized in, described ultrasonic probe is arranged on voussoir, ultrasonic probe is all connected with scanning frame with scrambler, ultrasonic probe and decoders-Synchronous are run, described scrambler is connected with ultrasonic phased array detector by data line, and described ultrasonic probe is connected with ultrasonic phased array detector by data line; Described ultrasonic probe surface scribbles couplant, is connected with voussoir by bolt.The present invention can realize this structure total cross-section nondestructive evaluation, can not only detect surface imperfection, can also detect inherent vice; Military service GIS end flange and cylindrical shell lateral angle weld seam can not only be detected, and medial angle weld seam can also be detected, the comprehensive assessment quality of this structure.
Description
Technical field
The present invention relates to electric power complete equipment field of non destructive testing, specifically a kind of gas insulated switchgear end flange based on ultrasonic phase array and cylindrical shell fillet weld apparatus for evaluating and nondestructive evaluation method thereof.
Background technology
Gas insulated switchgear (being called for short GIS) is the complete equipment combined by multiple High-Voltage Electrical Appliances such as isolating switch, disconnector, grounding switch, buses, these equipment or parts are all enclosed in metal can inside, and are filled with the SF of certain pressure (being generally greater than 0.3MPa)
6gas is as insulation and arc-extinguishing medium; Wherein GIS tank body is pressure-containing member, requires SF
6year leak rate is less than 1%.
GIS end flange and cylindrical shell fillet weld are the principal welds of GIS tank body, GIS end flange and cylindrical shell fillet weld are the lack of penetration plug-in types of permission as shown in Figure 1, this structure by outside end flange 1, cylindrical shell 2, fillet weld 3 and fillet weld inside 4 to form, barrel end inserts flange platform, to form inside fillet weld outside 4 and fillet weld 3 by welding, cylindrical shell end angle keeps lack of penetration state.Conventional GIS tank body material is aluminium alloy 5A02-H112 or carbon steel Q235, diameter 400-1000mm, thickness of shell 6-10mm, the usual 5mm of cylindrical shell insertion depth.In production run, weld seam easily produces the weld defectss such as incomplete fusion, pore and crackle.GIS during one's term of military service, due to the reason such as stress and vibration, easily makes fillet weld crack.Therefore regularly in time should carry out nondestructive evaluation to this structure, get rid of hidden danger in time, ensure the stable operation of system.
For GIS end flange and cylindrical shell fillet weld, domestic main use penetrant detecting method.Liquid penetrant testing can only detect surface imperfection, cannot detect internal porosity, not merge, the defect such as the crackle on surface of not ftractureing.In addition for the GIS tank body of being on active service, inside fillet weld, Liquid penetrant testing cannot be implemented in 4 regions.Therefore, existing detection method effectively can not solve the nondestructive evaluation problem of GIS end flange and cylindrical shell fillet weld.
Summary of the invention
Technical matters to be solved by this invention is the defect overcoming above-mentioned existing detection method existence, a kind of GIS end flange based on ultrasonic phase array and cylindrical shell fillet weld apparatus for evaluating are provided, this structure total cross-section nondestructive evaluation can be realized, can not only surface imperfection be detected, can also inherent vice be detected; Military service GIS end flange and cylindrical shell lateral angle weld seam can not only be detected, and medial angle weld seam can also be detected.
For this reason, the technical solution used in the present invention is as follows: GIS end flange and cylindrical shell fillet weld apparatus for evaluating, comprise ultrasonic phased array detector, ultrasonic probe, voussoir, scrambler, scanning frame, CSK-IIA test block, CSK-IA test block and reference block, it is characterized in that, described ultrasonic probe is arranged on voussoir, ultrasonic probe is all connected with scanning frame with scrambler, ultrasonic probe and decoders-Synchronous are run, described scrambler is connected with ultrasonic phased array detector by data line, described ultrasonic probe is connected with ultrasonic phased array detector by data line, described ultrasonic probe surface scribbles couplant, is connected with voussoir by bolt.
The ultimate principle of apparatus for evaluating of the present invention is: ultrasonic probe distance flange specific range, move along GIS tank surface hoop, scrambler record ultrasound probe position, ultrasonic probe carries out sector display according to certain focusing rule diagonal angle weld seam, ultrasonic phased array detector converts ultrasonoscopy to sector display data, thus realizes the nondestructive evaluation of fillet weld.
Further, described scanning frame is provided with at least one reference column, and the side of voussoir is provided with at least one pilot hole, coordinates the connection realizing voussoir and scanning frame, easy accessibility by pilot hole and reference column.
Further, described reference column and pilot hole respectively have two, are all symmetrical set, and make the connection of voussoir and scanning frame more reliable and stable.
Further, described scrambler is connected with the pin-and-hole be positioned on rear side of scanning frame by the bearing pin be positioned at before it, easy accessibility.
Further, described ultrasonic phased array detector is the ultrasonic phased array detector that simultaneously can show two kinds of imagings.
Further, described scrambler is wheel-type increment rotary encoder.
Further, CSK-IIA test block refers to the CSK-IIA test block being processed with the horizontal through hole of Ф 2 × 40mm specified in JB/T4730.3-2005; Described CSK-IA test block refers to the CSK-IA test block being processed with R100 and R50 arc surface specified in JB/T4730.3-2005; Described reference block be identical with workpiece to be checked or close specification and there is the test block of artificial defect.
Further, described reference block refers to the test block being processed with outside cutting one place inside Ф 2mm through hole one, the long dark 2mm weld seam of 20mm, the long dark 2mm weld seam of 20mm taper hole one outside taper hole one and the dark 5mm weld seam of Ф 2 inside cutting one place, the dark 5mm weld seam of Ф 2.
Further, described ultrasonic probe and the parameter of voussoir are calculated by Non-Destructive Testing simulation software CIVA and experiment draws, for the GIS of common specification, ultrasonic probe selects 10L16-A00, and this probe is the planar probe of stimulating frequency 10MHz, center wafer spacing 0.31mm, 16 wafers; Voussoir selects the SA00-N60S of shear refraction angle 60 °.
Another object of the present invention is to provide the nondestructive evaluation method of above-mentioned GIS end flange and cylindrical shell fillet weld apparatus for evaluating, and its step is followed successively by: determine fillet weld specification; CIVA simulation software is utilized to carry out acoustic beam covering design; Ultrasonic phased array detector is calibrated; Reference block is detected; The scanning of direct wave hoop is carried out to workpiece for measurement; The scanning of primary reflection hoop is carried out to workpiece for measurement; Analysis of image data and workpiece for measurement grade estimation.
Described determination fillet weld specification, refers to and consults relevant drawing or actual measurement, obtains the degree of depth, fillet weld leg height etc. of the material of cylindrical shell, wall thickness and insertion end flange.
The described CIVA simulation software that utilizes carries out acoustic beam covering design, refer to and use Non-Destructive Testing simulation software CIVA, modeling is carried out to fillet weld, wave beam emulation is carried out to the part model built up, thus select suitable ultrasonic probe and voussoir, and determine to focus on rule, the ad-hoc location of ultrasonic probe when determining that direct projection involves primary reflection.For the GIS of common specification, focus on the sector scan that rule selects 40 ° to 70 °.When direct wave detects, voussoir forward position is to end flange distance 10mm, and during primary reflection, voussoir forward position is to end flange distance 35mm.
Described ultrasonic phased array detector calibration, comprises voussoir delay calibration, fan sweeping retouches angle calibration system, sensitivity calibration.Voussoir delay calibration, refer to utilize the electronics trigger instants of the R100 cambered surface correcting probe of CSK-IA test block and acoustic beam to enter measured workpiece moment between delay, to draw the survey measurements of accurate sound path, the degree of depth, surface distance.Fan sweeping retouches angle calibration system, refers to and utilizes the echo height difference of the R100 cambered surface of CSK-IA test block to different deflection angle acoustic beam to revise.Sensitivity calibration, refers to and utilizes the horizontal through hole of the Ф 2 × 40mm of CSK-IIA test block to draw TCG curve.
Described detects reference block, it is the ultrasonic phased array detector after using calibration, according to CIVA simulation result, the voussoir that ultrasonic probe is housed is placed into specific position, use direct wave to detect inside Ф 2 through hole 1 in reference block, weld seam taper hole inside cutting and weld seam, verify the detectability of defect inside this detector butt welded seam; Use primary reflection to detect outside Ф 2 through hole in reference block, weld seam taper hole outside cutting and weld seam, verify the detectability of defect inside this detector butt welded seam.
Described carries out the scanning of direct wave hoop to workpiece for measurement, line sensitivity is evaluated with TCG, ultrasonic probe is placed on specific position, uses direct wave to carry out scanning to fillet weld inside region along tank body hoop, in scanning process, ensure that voussoir forward position meets the demands to end flange distance.
Described carries out the scanning of primary reflection hoop to workpiece for measurement, line sensitivity is evaluated with TCG, probe placement in specific position, use direct wave to carry out scanning to fillet weld exterior lateral area along tank body hoop, in scanning process, ensure that probe voussoir forward position meets the demands to end flange distance.
Described analysis of image data and workpiece for measurement grade estimation, refer to that an image data transmission is to computing machine, to data analysis, in conjunction with displays such as B-scanning, S-scanner uni A-scannings, to position, wave amplitude, the length of defect and highly measure, according to JB/T4730.3-2005 relevant regulations, classification is carried out to defect.
The beneficial effect that the present invention has:
1) for already present detection method, the invention solves GIS end flange and the cylindrical shell fillet weld problem without Efficient Evaluation method.Existing Liquid penetrant testing can only detect surface imperfection, cannot detect internal porosity, not merge, the defect such as underbead crack; In addition for the GIS tank body of being on active service, fillet weld inside region cannot implement Liquid penetrant testing.GIS end flange based on ultrasonic phase array provided by the invention and cylindrical shell fillet weld apparatus for evaluating and nondestructive evaluation method thereof, can realize this structure total cross-section nondestructive evaluation, can not only detect surface imperfection, can also detect inherent vice; Military service GIS end flange and cylindrical shell lateral angle weld seam can not only be detected, and medial angle weld seam can also be detected, the comprehensive assessment quality of this structure.
2) invention also improves Detection results.Relative to already present detection method, the present invention uses single probe just can realize the scanning of multi-angle, and defect more easily finds, efficiency is higher; Detection, location, quantitative and orientation accuracy can be improved to some defects; Can realize ultrasonic imaging, by graphical analysis, defect detection rate can be provided, and ultrasound data can persistence, detect and there is intuitive, trackability.
Accompanying drawing explanation
Fig. 1 is the partial schematic diagram of GIS end flange of the present invention and cylindrical shell fillet weld structure.
Fig. 2 is the one-piece construction figure of GIS end flange of the present invention and cylindrical shell fillet weld.
Fig. 3 is ultrasonic phase array detecting step figure of the present invention.
Fig. 4 is direct wave data plot of the present invention.
Fig. 5 is primary reflection data plot of the present invention.
Embodiment
Below by specification drawings and specific embodiments, the present invention is described in further detail, and following examples are descriptive is not determinate, can not limit protection scope of the present invention with this.
GIS end flange as shown in Figure 1-2 and cylindrical shell fillet weld ultrasonic phase array apparatus for evaluating, described scanning frame 6 is provided with two reference columns be symmetrical set, the housing of voussoir 5 is provided with two pilot holes be symmetrical set, and coordinates by pilot hole and reference column the connection realizing voussoir 5 and scanning frame 6.Described scrambler 7 is connected with the pin-and-hole on rear side of scanning frame by the bearing pin before it.Described scrambler 7 is wheel-type increment rotary encoder.Described scrambler 7 is connected with ultrasonic phased array detector 9 by data line, and be connected with voussoir 5 by bolt after couplant is coated on described ultrasonic probe 8 surface, described ultrasonic probe is connected with ultrasonic phased array detector 9 by data line.The parameter of described ultrasonic probe 8, voussoir 5, the distance x focusing on rule and voussoir Front distance flange have harmless detection simulation software CIVA and experiment to draw.
In the present embodiment, detected object is certain 220KVGIS tank end flange and cylindrical shell fillet weld, and as shown in Figure 3, the step of the present embodiment nondestructive evaluation method is as follows: determine fillet weld specification; CIVA software is utilized to carry out acoustic beam covering design; Ultrasonic phased array detector is calibrated; Reference block is detected; The scanning of direct wave hoop is carried out to workpiece for measurement; The scanning of primary reflection hoop is carried out to workpiece for measurement; Analysis of image data and workpiece for measurement grade estimation.
1. determine fillet weld specification
Through consulting drawing and actual measurement is learnt, GIS tank body total length 2m, external diameter φ 774, wall thickness 8mm, material 5A02-H112, cylindrical shell insertion depth 5mm, lateral angle weld seam leg height 10mm.
2. utilize CIVA software to carry out acoustic beam covering design
Use Non-Destructive Testing simulation software CIVA, modeling is carried out to fillet weld, wave beam emulation is carried out to the part model built up, select suitable probe and voussoir, and determine to focus on rule, voussoir forward position of popping one's head in when determining direct wave, primary reflection is to end flange distance x.For this specification GIS, ultrasonic probe selects 10L16-A00(stimulating frequency 10MHz, the planar probe of 16 wafers, center wafer spacing, 0.31mm), voussoir SA00-N60S(shear refraction angle 60 °), focus on the sector scan that rule uses 40 ° to 70 °.When direct wave detects, voussoir forward position is to the distance 10mm of end flange, and during primary reflection, voussoir forward position is to the distance 35mm of end flange.
3. phased array instrument calibration
Comprise voussoir delay calibration, angle calibration system, sensitivity calibration.Voussoir delay calibration, the delay between the moment that the electronics trigger instants utilizing the R100 cambered surface calibration of CSK-IA test block to pop one's head in and acoustic beam enter measured workpiece.Fan sweeping retouches angle calibration system, utilizes the echo height difference of the R100 cambered surface of CSK-IA test block to different deflection angle acoustic beam to revise.Sensitivity calibration, utilizes the horizontal through hole of the Ф 2 × 40mm of CSK-IIA test block to draw TCG curve.
4. pair reference block detects
Described detects reference block, use the ultrasonic phase array detection system after calibration,, when probe voussoir forward position is to end flange distance distance end flange 10mm, direct wave detection can accurately to detect inside Ф 2 through hole 1 in reference block, weld seam taper hole inside cutting and weld seam; When probe voussoir forward position is to end flange distance distance end flange 35mm, use primary event wave energy accurately to detect in reference block outside Ф 2 through hole, weld seam taper hole outside cutting and weld seam.
5. pair workpiece for measurement carries out the scanning of direct wave hoop
Line sensitivity, to the distance 10mm of end flange, is evaluated with TCG in voussoir forward position, uses direct wave to carry out scanning to fillet weld inside region as shown in Figure 2, obtain data plot as shown in Figure 4 along tank body hoop.
6. pair workpiece for measurement carries out the scanning of primary reflection hoop
Line sensitivity, to the distance 35mm of end flange, is evaluated with TCG in voussoir forward position, uses primary reflection to carry out scanning to fillet weld exterior lateral area as shown in Figure 2, obtain 5 data plots as shown in the figure along tank body hoop.
7. analysis of image data and workpiece for measurement grade estimation
Image data transmission to computing machine, to data analysis.Fig. 4, Fig. 5 upper left side is that A sweeps data plot, and upper right side is that S sweeps data plot, and below is B scan-data figure.S sweeps data plot horizontal ordinate and represents reflection wave horizontal level, ordinate represents the reflection wave degree of depth, B scan-data figure represents that ultrasonic probe is from scanning starting point distance, ordinate represents the reflected signal degree of depth, the size of the change representation signal wave amplitude of color in image, in colored situation, red expression signal wave amplitude is the strongest, and in black and white situation, more black expression signal wave amplitude is stronger.
In the direct wave data of Fig. 4, distance starting point 172mm, 528mm, 707mm and 762mm place find 4 place's weld seam inside region 4 defects altogether, the particularly range of linearity in 707mm to 731mm region, defect wave amplitude has exceeded TCG and has sentenced scrap wire, defect length reaches 24mm, according to according to JB/T4730.3-2005, this defect is judged to unacceptable defect.
In the primary event wave datum of Fig. 5, distance starting point 65mm, 491mm, 733mm place find 3 place's weld seam exterior lateral area 3 defects altogether, the particularly range of linearity in 733mm to 783mm region, defect wave amplitude has exceeded TCG and has sentenced scrap wire, defect length reaches 50mm, according to according to JB/T4730.3-2005, this defect is judged to unacceptable defect.
Visible " apparatus for evaluating and nondestructive evaluation method thereof " of the present invention, solving GIS end flange and cylindrical shell fillet weld cannot the problem of complete detection.The present invention uses single probe just can realize the scanning of multi-angle, and defect more easily finds, detection efficiency is higher; Detection, location, quantitative and orientation accuracy can be improved to some defects; Can realize ultrasonic imaging, by graphical analysis, defect detection rate is higher, and ultrasound data can persistence, detects and has intuitive, trackability.Therefore the present invention rapidly and efficiently can carry out nondestructive evaluation to GIS end flange and cylindrical shell fillet weld, well can be applied in engineering reality.
Claims (8)
1.GIS end flange and cylindrical shell fillet weld apparatus for evaluating, comprise ultrasonic phased array detector, ultrasonic probe, voussoir, scrambler, scanning frame, CSK-
a test block, CSK-
a test block and reference block, it is characterized in that, described ultrasonic probe is arranged on voussoir, ultrasonic probe is all connected with scanning frame with scrambler, ultrasonic probe and decoders-Synchronous are run, described scrambler is connected with ultrasonic phased array detector by data line, and described ultrasonic probe is connected with ultrasonic phased array detector by data line; Described ultrasonic probe surface scribbles couplant, is connected with voussoir by bolt;
Described CSK-
a test block refers to the CSK-being processed with the horizontal through hole of Ф 2 × 40mm specified in JB/T4730.3-2005
a test block; Described CSK-
a test block refers to the CSK-being processed with R100 and R50 arc surface specified in JB/T4730.3-2005
a test block; Described reference block be identical with workpiece to be checked or close specification and there is the test block of artificial defect;
Described reference block refers to the test block being processed with outside cutting one place inside Ф 2mm through hole one, the long dark 2mm weld seam of 20mm, the long dark 2mm weld seam of 20mm taper hole one outside taper hole one and the dark 5mm weld seam of Ф 2 inside cutting one place, the dark 5mm weld seam of Ф 2.
2. GIS end flange according to claim 1 and cylindrical shell fillet weld apparatus for evaluating, it is characterized in that, described scanning frame is provided with at least one reference column, and the side of voussoir is provided with at least one pilot hole, coordinates by pilot hole and reference column the connection realizing voussoir and scanning frame.
3. GIS end flange according to claim 2 and cylindrical shell fillet weld apparatus for evaluating, it is characterized in that, described reference column and pilot hole respectively have two, are all symmetrical set.
4. GIS end flange according to claim 1 and cylindrical shell fillet weld apparatus for evaluating, is characterized in that, described scrambler is connected with the pin-and-hole be positioned on rear side of scanning frame by the bearing pin be positioned at before it.
5. GIS end flange according to claim 1 and cylindrical shell fillet weld apparatus for evaluating, is characterized in that, described ultrasonic phased array detector is the ultrasonic phased array detector that simultaneously can show two kinds of imagings.
6. GIS end flange according to claim 1 and cylindrical shell fillet weld apparatus for evaluating, is characterized in that, described scrambler is wheel-type increment rotary encoder.
7. GIS end flange according to claim 1 and cylindrical shell fillet weld apparatus for evaluating, it is characterized in that, described ultrasonic probe and the parameter of voussoir are calculated by Non-Destructive Testing simulation software CIVA and experiment draws, for the GIS of common specification, ultrasonic probe selects 10L16-A00, and this probe is the planar probe of stimulating frequency 10MHz, center wafer spacing 0.31mm, 16 wafers; Voussoir selects the SA00-N60S of shear refraction angle 60 °.
8. the nondestructive evaluation method of GIS end flange described in any one of claim 1-7 and cylindrical shell fillet weld apparatus for evaluating, its step is followed successively by: determine fillet weld specification; CIVA simulation software is utilized to carry out acoustic beam covering design; Ultrasonic phased array detector is calibrated; Reference block is detected; The scanning of direct wave hoop is carried out to workpiece for measurement; The scanning of primary reflection hoop is carried out to workpiece for measurement; Analysis of image data and workpiece for measurement grade estimation.
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