CN114839277B - Nuclear power plant lining adhesive bonding state online detection and evaluation method - Google Patents
Nuclear power plant lining adhesive bonding state online detection and evaluation method Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses an online detection and evaluation method for the bonding state of lining rubber of a nuclear power plant, which comprises the following steps: manufacturing a standard test block and a reference test block; calibrating the device by a standard test block; transmitting ultrasonic waves to the test block with good bonding and the completely debonded test block to obtain ultrasonic wave multiple reflection wave amplitude gain information, and obtaining an ultrasonic detection bonding good reference and an ultrasonic detection completely debonded reference; carrying out ultrasonic detection on an object to be detected to obtain a plurality of groups of ultrasonic reflection wave amplitude gain information data; comparing with a reference; determining position information of poor adhesion and complete debonding, and submitting, operating and supervising and using the poor adhesion; performing magnetic flux leakage detection on the completely debonded position, performing imaging identification and analysis on reflected wave amplitude gain information data, calculating debonded area and debonded percentage, and giving out a judgment result according to the set waste judgment line and the magnetic flux leakage detection data; submitting to repair treatment or scrapping treatment. The invention performs on-line detection, quick evaluation and high accuracy.
Description
Technical Field
The invention belongs to the technical field of nuclear power, and relates to an online detection and evaluation method for a bonding state of lining rubber.
Background
The final cold source of the nuclear power plant is sea water, the safe and reliable operation of the cold source is the precondition and the necessary condition of the normal operation of the nuclear power plant, if the cold source fails, the heat of the reactor core cannot be discharged, so that the original fuel is overheated, and the integrity of the pressure boundary of the primary loop is lost, thereby causing nuclear safety accidents. Because seawater has stronger corrosiveness to metal, in order to solve the seawater corrosion problem, a metal-lining rubber composite structure is often selected as an important material for solving the corrosion problem in a cold source pipeline of a nuclear power plant, for a carbon steel metal-lining rubber composite structure pipeline, the lined metal is made of carbon steel with lower corrosion resistance, the medium seawater corrosiveness is extremely strong, a rubber lining is used as a unique corrosion-resistant barrier, and the ageing state of the rubber lining directly determines the safety and the functionality of equipment. The failure frequency of the related lining rubber pipeline in the cold source system is higher, the main reason that the lining rubber is basically determined to be failed in the IOE report analysis is caused by poor adhesion of the lining rubber and the metal matrix in the manufacturing or maintenance stage, the lining rubber further bulges, cracks and delaminates in the long-term seawater impact environment, and finally the seawater enters the metal matrix to quickly corrode and perforate. The main detection mode of the existing metal-lining rubber composite structure is that visual inspection and percussion inspection are carried out after a pipeline is locally disassembled, on one hand, 100% of detection cannot be carried out due to the position limitation, on the other hand, the bonding quality of key parameters cannot be detected, only the defects which are visible in the visual mode and the degumming found by the percussion mode can be judged, and the detection has great limitation. Meanwhile, repeated disassembly and assembly of the EDF feedback rubber lining pipe can cause damage of the flange surface rubber lining, and preventive inspection of a power plant should continue to optimize the detection method so as to reduce the disassembly and assembly amount as much as possible. In view of the importance of lining rubber pipes in the corrosion protection of nuclear power plants and the significant consequences that can result from aging failure of the lining rubber, periodic inspection of the lining rubber and evaluation of the bonding quality are necessary.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an online detection and evaluation method for the bonding state of the lining rubber of the nuclear power plant, which is used for online detection, rapid evaluation and high accuracy.
The technical scheme adopted for solving the technical problems is as follows:
The online detection and evaluation method for the bonding state of the lining rubber of the nuclear power plant comprises the following steps:
S1, manufacturing test blocks: manufacturing a standard test block for the calibration equipment and a reference test block with the same structure as the actually measured object; the reference test block comprises a well-adhered test block and a completely debonded test block; or directly adopting the good position of the on-site metal-lining rubber composite structure as a good bonding test block and directly adopting the bulge position in the on-site metal-lining rubber composite structure as a complete debonding test block;
S2, the ultrasonic detection equipment is accurate: the ultrasonic detection equipment is calibrated through a standard test block so as to adjust the horizontal linearity, the vertical linearity and the gain of the detection equipment;
S3, setting an ultrasonic detection bonding limit standard: respectively transmitting ultrasonic waves to the test block with good bonding and the test block with complete debonding to obtain ultrasonic wave multiple reflection wave amplitude gain information so as to determine an ultrasonic detection bonding good reference and an ultrasonic detection complete debonding reference;
S4, ultrasonic detection: carrying out ultrasonic detection on an object to be detected to obtain a plurality of groups of ultrasonic reflection wave amplitude gain information data;
S5, detection information processing: comparing the obtained multiple groups of ultrasonic reflection wave amplitude gain information data with an ultrasonic detection bonding good reference and an ultrasonic detection complete debonding reference; the data equal to or lower than the ultrasonic detection bonding good reference is bonding good, the data equal to or higher than the ultrasonic detection full debonding reference is full debonding, and the data between the data are bonding poor;
S6, defect classification processing: determining the position information of poor adhesion and complete debonding according to the step S5, and submitting a judgment result for operation supervision and use to the position of poor adhesion; step S7, performing a step S7 on the completely debonded position;
S7, magnetic flux leakage detection: performing magnetic flux leakage detection on the completely debonded position and the periphery of the completely debonded position, and further determining the metal corrosion condition;
s8, imaging identification: and carrying out imaging identification and analysis on the reflected wave amplitude gain information data, calculating the debonding area and the debonding percentage, and giving out a judgment result of repairing or scrapping treatment according to the set judgment waste line and the magnetic flux leakage detection data.
Further, in the method for online detecting and evaluating the bonding state of lining rubber in a nuclear power plant, preferably, in the step S1, the standard test block includes: and bonding a good standard test block and completely debonding the standard test block.
In the method for online detection and evaluation of the bonding state of the lining rubber of the nuclear power plant, in the step S1, preferably, the reference block comprises a calibration body with a steel structure and lining rubber bonded with the calibration body, the calibration body comprises at least two calibration parts which are matched and consistent with parameters of objects to be tested with different pipe diameters in sequence, each calibration part with the same parameter in the calibration body is arranged in pairs, wherein one bottom surface of the paired calibration parts is bonded with the lining rubber, and the other bottom surface of the paired calibration parts is free of the lining rubber; or only one checking part with the same parameters in the checking body is arranged, one half of the bottom surface of the checking part is adhered with lining glue, the other half of the bottom surface is not adhered with lining glue, the part adhered with the lining glue is a well adhered test block, and the part not adhered with the lining glue is a completely debonded test block.
Further, in the method for online detecting and evaluating the bonding state of lining rubber in a nuclear power plant, preferably in the step S2, the ultrasonic detection device includes the steps of:
s21, horizontal linear calibration: the horizontal linearity is calibrated according to GB/T29302;
s22, vertical linear calibration: calibrating according to JB/T29302;
S23, gain calibration: calibration was performed according to JJF 1338.
In the method for online detecting and evaluating the bonding state of the lining rubber in the nuclear power plant, preferably, in the step S3, the ultrasonic detection bonding good criterion is as follows: an adhesion good standard curve formulated according to the reflected wave amplitude information; the ultrasonic detection is based on the following steps: a complete debonding standard curve formulated according to the reflected wave amplitude information; placing the probe on a well-adhered test block, and adjusting the detection range to enable at least 10 reflection amplitudes to be seen on a screen of a detection instrument; and adjusting the amplitude of the sixth reflected wave to 15-25% of the full screen, drawing a first curve along a plurality of wave peaks to be a good bonding standard curve, and aligning the probe to the completely debonded test block to also draw a second curve to be a completely debonded standard curve.
In the method for online detection and evaluation of the bonding state of the lining rubber of the nuclear power plant, preferably, in the step S5, a plurality of groups of ultrasonic reflection wave amplitude gain information data are obtained, wherein the bonding is good when the bonding is equal to or lower than a bonding good standard curve, the bonding is complete when the bonding is equal to or higher than a complete debonding standard curve, and the bonding is poor when the bonding is poor between the two curves.
In the method for online detection and evaluation of the bonding state of the lining rubber of the nuclear power plant, preferably, in the step S3, ultrasonic waves are emitted to a test block with good bonding, the first reflected wave is adjusted to be 98-100% of a full screen, a cursor locks the sound path position of the sixth radiated wave, and a gate 1 is arranged at the peak position of the gate to obtain a good ultrasonic detection bonding benchmark; and (3) transmitting ultrasonic waves to the completely debonded test block, adjusting the first reflected wave to be placed at 98-100% of a full screen, locking the sound path position of the sixth radiated wave by a cursor, and placing the gate 2 at the wave crest position to obtain an ultrasonic detection completely debonded reference.
In the method for online detection and evaluation of the bonding state of the lining rubber in the nuclear power plant, preferably, in the step S4, before the ultrasonic detection, the surface of the metal-lining rubber composite structure is subjected to surface treatment at the uneven position, so that the probe is well bonded with the detected metal-lining rubber composite structure under the condition of not damaging the surface paint.
In the method for online detection and evaluation of the bonding state of the lining rubber of the nuclear power plant, preferably in the step S4, when the object to be detected is detected, the reflected wave with any wave crest lower than the wave crest of the gate 1 is well bonded; any reflected wave with amplitude higher than the wave crest of the gate 2 is in a complete debonding state; other amplitudes are placed between the shutter 1 and the shutter 2 in a poor adhesion state.
Further, in the method for online detecting and evaluating the bonding state of lining rubber in a nuclear power plant, preferably in the step S7, the step of detecting magnetic leakage is as follows:
S71, when the preliminary evaluation is in a completely debonded state, using a magnetic flux leakage detection instrument to detect corrosion and wall thickness of the corresponding position;
s72, if the magnetic leakage detection finds that the area is corroded, the wall thickness is smaller than the nominal parent metal wall of the pipeline
Thick, the area is evaluated as: lining rubber damage and pipeline corrosion, and seawater enters the metal pipeline base material; and S73, if the magnetic leakage detection finds that the area is not corroded and the wall thickness is within the range of the nominal wall thickness, the area is evaluated as a lining rubber bulge defect, and the lining rubber is not damaged.
According to the invention, the bonding quality and the metal corrosion condition of the internal metal-lining rubber composite structure are evaluated on line from the outer wall of the pipeline by adopting the ultrasonic sound field energy distribution and electromagnetic combination technology, so that the failure defects such as bulges, poor bonding and the like are effectively detected, the work of checking the lining rubber quality of the pipeline by opening during overhaul can be effectively reduced by detection, the unnecessary opening work is reduced, and the defective pipeline internal quality is mainly detected and targeted maintenance work is performed. Meanwhile, the defect that no effective supervision means exists during the current operation period is overcome, the safe operation of the rubber lining pipeline can be further improved through detection, the damage problem of the inner rubber lining is found in advance before the pipeline is corroded and leaked, and the safe operation of a unit cold source system is guaranteed.
In ultrasonic detection, the invention firstly determines the bonding limit standard of ultrasonic detection: comparing the reflected wave amplitude gain information data detected on site with the above-mentioned standard, wherein the data equal to or lower than the ultrasonic detection bonding good standard is bonding good, the data equal to or higher than the ultrasonic detection bonding complete debonding standard is complete debonding, and the data between the two is bonding bad; and (3) performing magnetic flux leakage detection on the completely or basically debonded position to further determine the metal corrosion condition, and finally giving an evaluation result of the bonding state of the lining rubber in the object to be tested.
When ultrasonic waves are emitted to the steel-rubber joint surface from the direction of the steel plate, most of energy is reflected back to the steel plate, and a small part of energy enters the lining layer, but because the attenuation of sound waves in the lining layer is serious, the transmitted waves entering the lining layer are almost completely attenuated, and only the sound field reflected back to the steel plate exists; when only the steel plate is arranged and another medium is not arranged at the joint, the sound wave is totally reflected, the energy is little lost, about 10% of the energy enters the lining layer to be lost after each sound wave is reflected by the joint surface, the wave amplitude difference is limited compared with the reflected sound wave ratio without the lining layer, but the reflected wave of the lining-metal joint surface and the reflected wave amplitude without the lining are obviously different after being reflected for more than 5 times, and whether the reflecting bottom surface is attached to the lining can be judged by observing the wave amplitude of the reflected wave for 5 times.
The external magnetic leakage detection can quickly and effectively detect the occurrence of metal corrosion defects, so that the external magnetic leakage detection is used as an auxiliary process to avoid the detection leakage and improve the detection efficiency.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a bottom view of FIG. 1;
Fig. 3 is a schematic structural view of another implementation of the embodiment of the present invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
The online detection and evaluation method for the bonding state of the lining rubber of the nuclear power plant comprises the following steps:
S1, manufacturing test blocks: manufacturing a standard test block for the calibration equipment and a reference test block with the same structure as the actually measured object; the reference test block comprises a well-adhered test block and a completely debonded test block; or directly adopting the good position of the on-site metal-lining rubber composite structure as a good bonding test block and directly adopting the bulge position in the on-site metal-lining rubber composite structure as a complete debonding test block;
the standard test block comprises a good-adhesion standard test block and a complete-debonding standard test block.
As shown in fig. 1-3, the reference block comprises a calibration body 1 with a steel structure and lining rubber 2 adhered to the calibration body 1, the calibration body 1 comprises at least two calibration parts 11 which are matched and consistent with parameters of objects to be tested with different pipe diameters in sequence, the calibration parts 11 with the same parameters in the calibration body 1 are arranged in pairs, wherein one bottom surface of each of the paired calibration parts 11 is adhered with the lining rubber 2, and the other bottom surface is free from the lining rubber 2; or only one checking part 11 with the same parameters in the checking body 1 is arranged, one half of the bottom surface of the checking part is adhered with the lining rubber 2, the other half of the bottom surface is not adhered with the lining rubber 2, the part adhered with the lining rubber 2 is a well adhered test block, and the part not adhered with the lining rubber is a completely debonded test block.
As shown in fig. 1-2, in this embodiment, the verification body 1 is provided with four groups of verification portions 11 with different thicknesses, the verification portions 11 have the same pipe diameter as a common lining pipe of a nuclear power plant, the verification body 1 includes four verification portions 11 with thicknesses of 10mm, 12mm, 16mm and 20mm, the four verification portions 11 are in a flat plate structure, and the four verification portions 11 are sequentially arranged or randomly arranged according to the thicknesses; the four preferred check portions 11 are arranged in a step-type mode, the length and the width of each check portion 11 are respectively 50mm and 80mm, the length and the width of the lining rubber 2 are respectively 200mm and 40mm, one half of the bottom surface of the check body 1 is adhered with the lining rubber 2, the other half of the bottom surface is free of the lining rubber 2, and at the moment, the sensitivity check assembly is suitable for detecting the lining rubber pipeline with the outer diameter more than or equal to 500 mm.
As shown in fig. 3, in other embodiments, the verification body 1 includes four verification portions 11 having a curved surface structure with thicknesses of 8mm, 10mm, 12mm, and 16mm, and the four verification portions 11 are sequentially or randomly arranged according to the thickness; the length and the width of each checking part 11 are respectively 50mm and 80mm, the length and the width of the lining rubber 2 are respectively 200mm and 40mm, one half of the bottom surface of the checking body 1 is adhered with the lining rubber 2, the other half of the bottom surface is free of the lining rubber 2, the curvature radius of the checking body 1 is 85mm, and the checking body is suitable for detecting lining rubber pipelines with the pipe diameters of 159-240 mm; or the curvature radius of the checking body 1 is 125mm, and the checking body is suitable for detecting rubber lining pipelines with the pipe diameter of 240-360 mm; or the curvature radius of the checking body 1 is 185mm, and the checking body is suitable for detecting rubber lining pipelines with the pipe diameter of 360-500 mm.
In other embodiments, 3 pairs of checking parts 11 with the same parameters are arranged in the checking body 1, the thicknesses of the 3 pairs of checking parts 11 are respectively 3mm, 5mm and 8mm, and the checking parts 11 with 6 curved surface structures in total and the 6 checking parts 11 are sequentially arranged or randomly arranged according to the thicknesses; the length and the width of each checking part 11 are respectively 30mm and 25mm, and the length and the width of the lining rubber 2 are respectively 90mm and 25mm, wherein the lining rubber 2 is adhered to one bottom surface and the lining rubber 2 is not adhered to the other bottom surface of each checking part 11 in pairs; the adhesive surface of two checking parts 11 with the thickness of 8mm is used as a symmetry axis, the bottom surface of one side is adhered with the lining rubber 2, the bottom surface of the other side is not adhered with the lining rubber 2, the curvature radius of the checking body 1 is 26mm, and the checking device is suitable for detecting the lining rubber pipeline with the pipe diameter of 50-60 mm; or the curvature radius of the checking body 1 is 32mm, and the checking body is suitable for detecting rubber lining pipelines with the pipe diameter of 60-72 mm; or the curvature radius of the checking body 1 is 40mm, and the checking body is suitable for detecting rubber lining pipelines with the pipe diameter of 72-90 mm.
S2, the ultrasonic detection equipment is accurate: the ultrasonic detection equipment is calibrated through a standard test block so as to adjust the horizontal linearity, the vertical linearity and the gain of the detection equipment;
Preferably, in the step S2, the ultrasonic detection apparatus includes the steps of:
s21, horizontal linear calibration: the horizontal linearity is calibrated according to GB/T29302;
s22, vertical linear calibration: calibrating according to JB/T29302;
S23, gain calibration: calibration was performed according to JJF 1338.
S3, setting an ultrasonic detection bonding limit standard: and respectively transmitting ultrasonic waves to the test block with good bonding and the test block with complete debonding, and obtaining ultrasonic wave multiple reflection wave amplitude gain information so as to determine an ultrasonic detection bonding good reference and an ultrasonic detection complete debonding reference.
There are two types of reference determination implementations:
The first embodiment is: the good benchmark of ultrasonic detection bonding is as follows: an adhesion good standard curve formulated according to the reflected wave amplitude information; the ultrasonic detection is based on the following steps: a complete debonding standard curve formulated according to the reflected wave amplitude information; placing the probe on a well-adhered test block, and adjusting the detection range to enable at least 10 reflection amplitudes to be seen on a screen of a detection instrument; and adjusting the amplitude of the sixth reflected wave to 15-25% of the full screen, drawing a first curve along a plurality of wave peaks to be a good bonding standard curve, and aligning the probe to the completely debonded test block to also draw a second curve to be a completely debonded standard curve.
The second embodiment is: transmitting ultrasonic waves to a test block with good bonding, adjusting the first reflected wave to be placed at 98-100% of a full screen, locking the sound path position of the sixth radiated wave by a cursor, and placing the gate 1 at the wave crest position to obtain a good ultrasonic detection bonding reference; and (3) transmitting ultrasonic waves to the completely debonded test block, adjusting the first reflected wave to be placed at 98-100% of a full screen, locking the sound path position of the sixth radiated wave by a cursor, and placing the gate 2 at the wave crest position to obtain an ultrasonic detection completely debonded reference.
S4, ultrasonic detection: carrying out ultrasonic detection on an object to be detected to obtain a plurality of groups of ultrasonic reflection wave amplitude gain information data;
The special equipment for rubber lining pipeline detection is adopted for scanning, and the scanning mode mainly comprises scanning along the pipeline liquid flow direction, and comprises 100% scanning, parallel line scanning and grid line scanning. The width of the grid line is generally 25-50 mm, and is specifically selected according to the pipe diameter.
Inputting detection information (including the information of pipeline number, straight pipe or elbow, detection period, etc.), wherein the detection probe adopts phased array ultrasonic detection probe, the number of wafers is 16-64, and the sizes of the combined pipeline diameter are matched with the number of different wafers. The probe frequency is 2-5 MHz, and is selected by combining the wall thickness of the pipeline, and the probe frequency of 2.25MHz is generally selected.
The probe is driven to scan the whole pipeline. The scanning device includes a probe holding portion, a driving portion, and a guiding portion, and an encoder for recording a position is installed. The probe clamping part can adjust and set the center-to-center distance of the probe, and the center-to-center distance and the relative angle of the probe are kept unchanged during scanning. The guide portion should be capable of keeping the probe motion trajectory consistent with the reference line during scanning. The driving part may be driven by a motor or manually. The encoder in the checking device should have its position resolution meeting the requirements of the relevant standard.
An effective medium suitable for a detected workpiece is used as an ultrasonic coupling agent. Materials with good sound permeability, easy cleaning, no toxicity and harm and proper fluidity are required; has no damage to materials, human bodies and environment, and is convenient to clean after detection. Typical coupling agents include water, methylcellulose paste, detergents, motor oil and glycerin, and ethanol or similar liquids may be used at sub-zero temperatures.
The couplant used for actual detection should be the same as the couplant used for detection system setup and calibration and adhesion margin standard setup. The selected couplant should ensure stable and reliable detection within the temperature range specified by the technical regulations. Water and nuclear grade couplants are preferred for use in the field.
Firstly, verifying on a workpiece to be detected before field detection, performing actual test on at least 3 bonding good positions of each detection area, and ensuring the peak position of the 6 th reflected wave locked by the gate 1 by adjusting a gain knob of an instrument.
Before ultrasonic detection, the surface of the metal-lining rubber composite structure is subjected to surface treatment at the uneven position without damaging paint on the surface, so that the probe is well attached to the detected metal-lining rubber composite structure.
S5, detection information processing: comparing the obtained multiple groups of ultrasonic reflection wave amplitude gain information data with an ultrasonic detection bonding good reference and an ultrasonic detection complete debonding reference; the data equal to or lower than the ultrasonic detection bonding good reference is bonding good, the data equal to or higher than the ultrasonic detection full debonding reference is full debonding, and the data between the data are bonding poor;
First embodiment: and detecting an object to be detected to obtain a plurality of groups of ultrasonic reflection wave amplitude gain information data, comparing the information data with a good bonding standard curve and a complete debonding standard curve, wherein the good bonding is realized when the value is equal to or lower than the good bonding standard curve, the complete debonding is realized when the value is equal to or higher than the complete debonding standard curve, and the poor bonding is realized when the value is equal to or higher than the complete debonding standard curve.
Second embodiment: detecting an object to be detected to obtain a plurality of groups of ultrasonic reflected wave amplitude gain information data, wherein reflected waves with any wave crest lower than the wave crest of the gate 1 are well bonded; any reflected wave with amplitude higher than the wave crest of the gate 2 is in a complete debonding state; other amplitudes are placed between the shutter 1 and the shutter 2 in a poor adhesion state.
S6, defect classification processing: determining the position information of poor adhesion and complete debonding according to the step S5, and submitting a judgment result for operation supervision and use to the position of poor adhesion; step S7, performing a step S7 on the completely debonded position;
S7, magnetic flux leakage detection: performing magnetic flux leakage detection on the completely debonded position and the periphery of the completely debonded position, and further determining the metal corrosion condition;
In the step S7, the magnetic flux leakage detection step includes:
S71, when the preliminary evaluation is in a completely debonded state, using a magnetic flux leakage detection instrument to detect corrosion and wall thickness of the corresponding position;
S72, if the leakage magnetic detection finds that the area is corroded and the wall thickness is smaller than the nominal base material wall thickness of the pipeline, the area is evaluated as follows: lining rubber damage and pipeline corrosion, and seawater enters the metal pipeline base material;
And S73, if the magnetic leakage detection finds that the area is not corroded and the wall thickness is within the range of the nominal wall thickness, the area is evaluated as a lining rubber bulge defect, and the lining rubber is not damaged.
S8, imaging identification: and carrying out imaging identification and analysis on the reflected wave amplitude gain information data, calculating the debonding area and the debonding percentage, and giving out a judgment result of repairing or scrapping treatment according to the set judgment waste line and the magnetic flux leakage detection data.
Specific application example of the invention:
And detecting two downstream of each four tubes Y1SEC011/012/015/016JD, eight elbows in the field Y1 machine set, and dividing each tube into 25 strips A-Y respectively. 6 to 12 points are detected on each line of the first elbow at the downstream, 208 points are detected in total, 8 to 16 points are detected on each line of the second elbow at the downstream, 287 points are detected in total, the points detected by different elbows are different due to different lengths, and the width of the grid line is 50mm.
And placing the probe at a position where the test lining rubber pipe is well bonded, and adjusting the detection range to enable at least 10 reflection amplitudes to be seen on a screen of a detection instrument. And adjusting the amplitude of the sixth reflected wave to be about 20% of the full screen, drawing a first curve on the screen as a good ultrasonic detection adhesion reference, and drawing a second curve of the probe alignment bulge (or complete falling) as a complete ultrasonic detection adhesion removal reference. The detection signal is lower than the first curve and is a zone I, and the zone I is evaluated as good in adhesion; the detection signal is in the first curve and above and lower than the second curve as the zone II, the zone is evaluated as poor adhesion, the signal is in the second curve and above as the zone III, and the zone is evaluated as complete falling off.
The field test data statistics are as follows:
And (3) field detection and verification: in the Y1 machine lining rubber pipe, the existence of partial bulge (in a non-detection range) is detected by detecting the bent pipe with the bulge position under the same detection sensitivity condition, and the detection signal of the bent pipe with the bulge is about 39.8dB.
And comparing the abnormal signal detected by the Y1 machine rubber lining pipe with the real bulge signal, wherein the abnormal signal of the rubber lining pipe is lower than the real bulge signal, which indicates that the detected abnormal signal is not in a complete debonding state. Part of signals are 2-4 dB higher than the well-adhered positions, and the method belongs to normal detection and normal phenomenon. This is mainly caused by the fact that the probe coupling state is different in each position detection, so that the deviation exists, but the glue lining bonding quality is poor for the positions of the first bent pipe A3 downstream of the Y1SEC016JD and the second bent pipe C2 downstream of the Y1SEC016 JD.
In addition, the same stipulation detection is carried out on two downstream of each four pipes Y1SEC011/012/015/016JD of the field Y4 machine set, eight elbows are added, each pipe is divided into 25 strips A-Y respectively, no abnormal signal (considering 2-4 dB coupling error) is found in all test points of the Y4 machine, and no visual defect is found after the pipe is disassembled during Y403 overhaul.
Claims (10)
1. The online detection and evaluation method for the bonding state of the lining rubber of the nuclear power plant is characterized by comprising the following steps of:
S1, manufacturing test blocks: manufacturing a standard test block for the calibration equipment and a reference test block with the same structure as the actually measured object; the reference test block comprises a well-adhered test block and a completely debonded test block; or directly adopting the good position of the on-site metal-lining rubber composite structure as a good bonding test block and directly adopting the bulge position in the on-site metal-lining rubber composite structure as a complete debonding test block;
s2, the ultrasonic detection equipment is accurate: calibrating the ultrasonic detection equipment through a standard test block to adjust the horizontal linearity, the vertical linearity and the gain adjustment of the detection equipment;
S3, setting an ultrasonic detection bonding limit standard: respectively transmitting ultrasonic waves to the test block with good bonding and the test block with complete debonding to obtain ultrasonic wave multiple reflection wave amplitude gain information so as to determine an ultrasonic detection bonding good reference and an ultrasonic detection complete debonding reference;
S4, ultrasonic detection: carrying out ultrasonic detection on an object to be detected to obtain a plurality of groups of ultrasonic reflection wave amplitude gain information data;
S5, detection information processing: comparing the obtained multiple groups of ultrasonic reflection wave amplitude gain information data with an ultrasonic detection bonding good reference and an ultrasonic detection complete debonding reference; the data equal to or lower than the ultrasonic detection bonding good reference is bonding good, the data equal to or higher than the ultrasonic detection full debonding reference is full debonding, and the data between the data are bonding poor;
S6, defect classification processing: determining the position information of poor adhesion and complete debonding according to the step S5, and submitting a judgment result for operation supervision and use to the position of poor adhesion; step S7, performing a step S7 on the completely debonded position;
S7, magnetic flux leakage detection: performing magnetic flux leakage detection on the completely debonded position and the periphery thereof, and further determining whether the completely debonded position and the debonded area are completely debonded;
s8, imaging identification: and carrying out imaging identification and analysis on the reflected wave amplitude gain information data, calculating the debonding area and the debonding percentage, and giving out a judgment result of repairing or scrapping treatment according to the set judgment waste line and the magnetic flux leakage detection data.
2. The method for online detection and evaluation of a bonding state of lining rubber in a nuclear power plant according to claim 1, wherein in the step S1, the standard test block comprises: and bonding a good standard test block and completely debonding the standard test block.
3. The method for online detection and evaluation of the bonding state of lining rubber in a nuclear power plant according to claim 1, wherein in the step S1, the reference block comprises a calibration body with a steel structure and lining rubber bonded with the calibration body, the calibration body comprises at least two calibration parts which are matched and consistent with parameters of objects to be tested with different pipe diameters in sequence, each calibration part with the same parameter in the calibration body is arranged in pairs, wherein one bottom surface of the paired calibration parts is bonded with lining rubber, and the other bottom surface of the paired calibration parts is free of lining rubber; or only one checking part with the same parameters in the checking body is arranged, one half of the bottom surface of the checking part is adhered with lining glue, the other half of the bottom surface is not adhered with lining glue, the part adhered with the lining glue is a well adhered test block, and the part not adhered with the lining glue is a completely debonded test block.
4. The method for online detection and evaluation of the bonding state of lining rubber in a nuclear power plant according to claim 1, wherein in the step S2, the ultrasonic detection device is calibrated to include the steps of:
s21, horizontal linear calibration: the horizontal linearity is calibrated according to GB/T29302;
s22, vertical linear calibration: calibrating according to JB/T29302;
S23, gain calibration: calibration was performed according to JJF 1338.
5. The method for on-line detection and evaluation of bonding state of lining rubber in nuclear power plant according to claim 1, wherein in the step S3, the ultrasonic detection bonding is based on the following good criteria: an adhesion good standard curve formulated according to the reflected wave amplitude information; the ultrasonic detection is based on the following steps: a complete debonding standard curve formulated according to the reflected wave amplitude information; placing the probe on a well-adhered test block, and adjusting the detection range to enable at least 10 reflection amplitudes to be seen on a screen of a detection instrument; and adjusting the amplitude of the sixth reflected wave to 15-25% of the full screen, drawing a first curve along a plurality of wave peaks to be a good bonding standard curve, and aligning the probe to the completely debonded test block to also draw a second curve to be a completely debonded standard curve.
6. The method for online detection and evaluation of bonding state of lining rubber in nuclear power plant according to claim 5, wherein in step S5, a plurality of sets of ultrasonic reflection wave amplitude gain information data are obtained, wherein the data are good in bonding when the data are equal to or lower than a bonding good standard curve, and are poor in bonding when the data are equal to or higher than a full debonding standard curve.
7. The method for on-line detection and evaluation of the bonding state of lining rubber in a nuclear power plant according to claim 1, wherein in the step S3, ultrasonic waves are emitted to a test block with good bonding, the first reflected wave is adjusted to be placed at 98-100% of full screen, the cursor locks the sound path position of the radiation wave for the 6 th-15 th time, and the gate 1 is placed at the peak position to obtain a good reference for ultrasonic detection and bonding; and (3) transmitting ultrasonic waves to the completely debonded test block, adjusting the first reflected wave to be placed at 98-100% of a full screen, locking the sound path position of the sixth radiated wave by a cursor, and placing the gate 2 at the wave crest position to obtain an ultrasonic detection completely debonded reference.
8. The method for online detection and evaluation of the bonding state of lining rubber in a nuclear power plant according to claim 7, wherein in the step S4, when the object to be detected is detected, reflected waves with six times of any wave peak lower than the wave peak of the gate 1 are all well bonded; any reflected wave with amplitude higher than the wave crest of the gate 2 is in a complete debonding state; other amplitudes are placed between the shutter 1 and the shutter 2 in a poor adhesion state.
9. The method for on-line detection and evaluation of the bonding state of lining rubber in a nuclear power plant according to claim 1, wherein in the step S4, before the ultrasonic detection, the surface of the metal-lining rubber composite structure is subjected to surface treatment at the uneven position, so that the probe is well bonded with the detected metal-lining rubber composite structure without damaging the surface paint.
10. The method for online detection and evaluation of the bonding state of lining rubber in a nuclear power plant according to claim 1, wherein in the step S7, the step of detecting magnetic leakage is:
S71, when the preliminary evaluation is in a completely debonded state, using a magnetic flux leakage detection instrument to detect corrosion and wall thickness of the corresponding position;
S72, if the leakage magnetic detection finds that the area is corroded and the wall thickness is smaller than the nominal base material wall thickness of the pipeline, the area is evaluated as follows: lining rubber damage and pipeline corrosion, and seawater enters the metal pipeline base material;
And S73, if the magnetic leakage detection finds that the area is not corroded and the wall thickness is within the range of the nominal wall thickness, the area is evaluated as a lining rubber bulge defect, and the lining rubber is not damaged.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4255798A (en) * | 1978-05-30 | 1981-03-10 | Schlumberger Technology Corp. | Method and apparatus for acoustically investigating a casing and cement bond in a borehole |
| NL187089C (en) * | 1977-07-11 | 1991-05-16 | Schlumberger Prospection | METHOD FOR DETERMINING THE QUALITY OF THE CEMENT ADHESION AROUND A CASING |
| JP5171923B2 (en) * | 2010-10-28 | 2013-03-27 | 三菱電機エンジニアリング株式会社 | Ultrasonic bonding control apparatus and ultrasonic bonding control method |
| CN102608204A (en) * | 2012-02-22 | 2012-07-25 | 湖北三江航天江北机械工程有限公司 | Method for ultrasonic detection of bonding quality of thin-walled metal and non-metal material |
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| KR101478465B1 (en) * | 2013-10-22 | 2014-12-31 | 주식회사 디섹 | Mechanized Ultrasonic Testing Method for Curved Pipe Welding Zone |
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| CN105758868A (en) * | 2016-03-28 | 2016-07-13 | 成都飞机工业（集团）有限责任公司 | Thermal protecting structure debonding defect detecting method and system |
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-
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Non-Patent Citations (2)
| Title |
|---|
| CFRP蒙皮-CFRP胶接质量的原位超声检测技术;高晓进;周金帅;江柏红;;玻璃钢/复合材料;20180426(04);全文 * |
| 基于超声特征成像技术的铝硅热障涂层脱粘缺陷检测;刘勋丰;李杨杨;黄勇;;无损检测;20171010(10);全文 * |
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