CN113866274B - Ultrasonic detection method for filling defects of steel epoxy sleeve for oil-gas long-distance pipeline - Google Patents
Ultrasonic detection method for filling defects of steel epoxy sleeve for oil-gas long-distance pipeline Download PDFInfo
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- CN113866274B CN113866274B CN202111273995.5A CN202111273995A CN113866274B CN 113866274 B CN113866274 B CN 113866274B CN 202111273995 A CN202111273995 A CN 202111273995A CN 113866274 B CN113866274 B CN 113866274B
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- 239000004593 Epoxy Substances 0.000 title claims abstract description 72
- 230000007547 defect Effects 0.000 title claims abstract description 71
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 59
- 239000010959 steel Substances 0.000 title claims abstract description 59
- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 230000000694 effects Effects 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims description 14
- 230000006978 adaptation Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 239000000945 filler Substances 0.000 description 4
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N29/048—Marking the faulty objects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/262—Arrangements for orientation or scanning by relative movement of the head and the sensor by electronic orientation or focusing, e.g. with phased arrays
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses an ultrasonic detection method for filling defects of a steel epoxy sleeve for an oil-gas long-distance pipeline, which relates to the technical field of detection of pipe network operation components and aims to solve the problems that the steel epoxy sleeve has the defect of insufficient filling of epoxy and influences the repairing effect of the sleeve in the field construction process, and the technical scheme is characterized by comprising the following steps: selecting a tool, selecting a phased array ultrasonic detector excited by negative square waves, and selecting a phased array transducer; and (3) positioning and quantifying defects, detecting by adopting a longitudinal wave direct incidence film, filling the defects, manufacturing a steel epoxy sleeve filling defect ultrasonic reference block according to the size of an image marking area, detecting results, and placing the ultrasonic reference block after normal detection into the defect position to ensure the whole normal use. The effects of rapid accurate quantitative positioning, high accuracy and convenient detection of the defects are achieved.
Description
Technical Field
The invention relates to the technical field of nondestructive testing, in particular to an ultrasonic testing method for filling defects of steel epoxy sleeves for oil and gas long-distance pipelines.
Background
The steel epoxy sleeve is a non-stop and non-welding pipeline repairing mode, has the advantages of convenient operation, non-stop and non-fire, and the like, and is one of the main means for repairing defective pipelines in the oil and gas long-distance transmission field, and the steel epoxy sleeve reinforcement repairing technology can effectively share the stress of defective positions and is widely applied to repairing defects of petroleum and natural gas pipelines.
At present, the steel epoxy sleeve repairing technology is to cover the outside of the pipe body defect by using two semicircular assemblies made of steel plates, keep a certain annular gap with a pipeline, seal two ends of the annular gap by using special glue, then fill epoxy filler in the sealed space to form a composite sleeve, and reinforce and repair the pipe defect in a mode that the repairing quality of the steel epoxy sleeve is critical to the safety of the repaired defect, and the repairing effect of the steel epoxy sleeve is obviously influenced by the epoxy filler in the middle layer and the interface bonding effect.
The prior art solutions described above have the following drawbacks: the construction quality of the epoxy interlayer has a great relationship with the performance of the epoxy filler, the surface treatment, and the ring gap between the sleeve and the pipe. In the field construction process, the influence of factors such as uneven annular gap thickness between the sleeve and the pipeline, solidification shrinkage of the epoxy filler and the like easily causes the defect of insufficient epoxy filling of the steel epoxy sleeve in the field construction process, and influences the repairing effect of the sleeve.
Disclosure of Invention
The invention aims to provide an ultrasonic detection method for filling defects of a steel epoxy sleeve for an oil-gas long-distance pipeline, which greatly improves the existing scanning, positioning and quantifying of the defects of the epoxy sleeve.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an ultrasonic detection method for filling defects of steel epoxy sleeves for oil and gas long-distance pipelines comprises the following steps:
s1: selecting a tool, namely selecting a phased array ultrasonic detector excited by negative square waves, wherein the emission output waveform of the phased array ultrasonic detector is the negative square waves, selecting a phased array transducer, and the wafer frequency of the ultrasonic guided wave transducer is 5MHz;
s2: the method comprises the steps of positioning and quantifying defects, detecting by adopting a longitudinal wave direct incidence film, scanning by adopting a line scanning mode, wherein the scanning angle is 0 DEG, performing C scanning coding by using the echo height of multiple waves during detection, wherein an epoxy resin-free area in a C scanning chart is red, an epoxy resin-free area is light blue or white, and the size of an image marking area is according to the size of the image marking area;
s3: filling defects, namely manufacturing a steel epoxy sleeve filling defect ultrasonic reference block according to the size of an image marking area, wherein the steel epoxy sleeve filling defect ultrasonic reference block is made of the same material and the same structure as the acoustic performance of a detected workpiece, and placing the manufactured reference block at the defect;
s4: the detection achievement, the defect is put into to the supersound contrast test block after will detecting normally, guarantees whole normal use to detect the sleeve that can normal use, make the second contrast test block simultaneously and detect, make things convenient for whole to change after damaging, thereby guarantee whole good adaptation effect.
Through adopting above-mentioned technical scheme, use the phased array ultrasonic detector of negative square wave excitation to establish the defect in the steel epoxy sleeve to guarantee wholly to conveniently fill the preparation of piece according to the defect size of discernment, guarantee that can normally use after the integral erection.
Further, the emission voltage of the phased array ultrasonic detector in the step S1 is 100V, the pulse emission width of the phased array ultrasonic detector is adjustable from 30ns to 1000ns, and the minimum adjustment step is 5ns.
By adopting the technical scheme, the data of the phased array ultrasonic detector are limited, so that the phased array ultrasonic detector can fully detect the defect, and the manufacturing of the comparison block is convenient to integrally carry out according to the size of the defect.
Further, the gain adjustment range of the receiving circuit of the phased array ultrasonic detector is 110dB, and the minimum adjustment step is 0.1dB.
Through adopting above-mentioned technical scheme, the circuit regulation numerical value of phased array ultrasonic detector is less, makes things convenient for wholly carrying out abundant scanning to comparatively subtle defect position, guarantees wholly good scanning positioning effect, has increased whole scanning positioning effect.
Further, the wafer size of the ultrasonic guided wave transducer in the step S1 is 0.6mm, the aperture size is phi 8mm, and the probe is 128 array elements.
Through adopting above-mentioned technical scheme, use ultrasonic guided wave transducer's wafer to wholly survey, guarantee wholly good detection positioning effect to guarantee wholly good location scanning effect, increased holistic filling effect.
Further, the size of the steel epoxy sleeve filling defect ultrasonic comparison test block in the step S3 is 300mm multiplied by 300mm, the upper layer is a steel arc plate with the thickness of 10mm, the middle layer is 15mm of epoxy, and the lower layer is a steel arc plate with the thickness of 10 mm.
Through adopting above-mentioned technical scheme, the steel epoxy sleeve fills defect supersound contrast test block and can make according to the defect size that has arrived to guarantee to make the back that wholly can carry out abundant block with defect department, guarantee to use normally after the integral erection.
Further, flat bottom holes with the diameter of 25mm, the diameter of 20mm, the diameter of 15mm, the diameter of 10mm, the diameter of 8mm and the diameter of 5mm are respectively processed on the ultrasonic reference block for filling the defects of the steel epoxy sleeve, and all the flat bottom holes are processed to the upper steel-epoxy interface to simulate the filling defects of the steel epoxy sleeve.
Through adopting above-mentioned technical scheme, the steel epoxy sleeve that the defect was filled to the simulation steel epoxy sleeve fills defect ultrasonic contrast test block and has seted up flat bottom hole, and convenient whole installation is used, guarantees whole good repair effect.
Further, the second reference block in the S4 is identical to the steel epoxy sleeve filling defect ultrasonic reference block in specification, and the second reference block and the steel epoxy sleeve filling defect ultrasonic reference block are identical in manufacturing method.
Through adopting above-mentioned technical scheme, preparation second contrast test block prevents that steel epoxy sleeve from filling defect supersound contrast test block from producing the damage and need redoing at the in-process that uses, makes things convenient for whole to change the supersound contrast test block of defect is filled to the steel epoxy sleeve that damages.
In summary, the beneficial technical effects of the invention are as follows:
1. the ultrasonic phased array equipment is adopted to perform circular linear detection on the outer wall of the sleeve, so that the detection of filling defects of the steel epoxy sleeve for the oil and gas long-distance pipeline and the accurate quantification and positioning of the defects are realized, and the effect of rapid and accurate quantitative positioning of the defects is realized;
2. compared with the traditional knocking method, the method has higher detection precision and detection reliability, and achieves the effect of high precision;
3. the phased array ultrasonic detector is adopted to emit and receive ultrasonic waves into the detected steel epoxy sleeve, the handheld detection device is used for assisting the transducer in detecting the steel epoxy sleeve detection surface, and the echo signals made by the steel epoxy sleeve ultrasonic comparison test block are utilized to locate and quantify defects in the steel epoxy sleeve, so that the effect of convenient detection is achieved.
Drawings
FIG. 1 is a schematic diagram of the workflow of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, an ultrasonic detection method for filling defects of steel epoxy sleeves for oil and gas long-distance pipelines comprises the following steps:
s1: selecting a tool, namely selecting a phased array ultrasonic detector excited by negative square waves, wherein the emitted output waveform of the phased array ultrasonic detector is a negative square wave, selecting a phased array transducer, wherein the wafer frequency of the ultrasonic guided wave transducer is 5MHz, the emitted voltage of the phased array ultrasonic detector is 100V, the pulse emission width of the phased array ultrasonic detector is adjustable from 30ns to 1000ns, the minimum adjustment step is 5ns, the gain adjustment range of a receiving circuit of the phased array ultrasonic detector is 110dB, the minimum adjustment step is 0.1dB, the wafer size of the ultrasonic guided wave transducer is 0.6mm, the aperture size is phi 8mm, and the probe is 128 array elements;
s2: the method comprises the steps of positioning and quantifying defects, detecting by adopting a longitudinal wave direct incidence film, scanning by adopting a line scanning mode, wherein the scanning angle is 0 DEG, performing C scanning coding by using the echo height of multiple waves during detection, wherein an epoxy resin-free area in a C scanning chart is red, an epoxy resin-free area is light blue or white, and the size of an image marking area is according to the size of the image marking area;
s3: filling defects, namely manufacturing a steel epoxy sleeve filling defect ultrasonic reference block according to the size of an image marking area, manufacturing the steel epoxy sleeve filling defect ultrasonic reference block by adopting a material with the same acoustic performance as that of a detected workpiece and the same structure, putting the manufactured reference block into a defect, wherein the size of the steel epoxy sleeve filling defect ultrasonic reference block is 300mm multiplied by 300mm, a steel arc plate with the upper layer of 10mm, an epoxy layer with the middle layer of 15mm and a steel arc plate with the lower layer of 10mm, and respectively processing flat bottom holes with phi 25mm, phi 20mm, phi 15mm, phi 10mm, phi 8mm and phi 5mm on the steel epoxy sleeve filling defect ultrasonic reference block, and processing flat bottom holes with phi 25mm, phi 15mm, phi 10mm, phi 8mm and phi 5mm to an upper layer steel-epoxy interface to simulate the steel epoxy sleeve filling defects;
s4: the detection result is that the ultrasonic reference block after normal detection is put into the defect, the normal use of the whole body is ensured, the sleeve which can be used normally is detected, the second reference block is manufactured simultaneously for detection, the specification of the second reference block is consistent with that of the ultrasonic reference block filled with the steel epoxy sleeve, the manufacturing method of the second reference block is the same as that of the ultrasonic reference block filled with the steel epoxy sleeve, the whole body is convenient to replace after being damaged, and therefore the whole good adaptation effect is ensured.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (5)
1. An ultrasonic detection method for filling defects of steel epoxy sleeves for oil and gas long-distance pipelines is characterized by comprising the following steps of: the method comprises the following steps:
s1: selecting a tool, namely selecting a phased array ultrasonic detector excited by negative square waves, wherein the emission output waveform of the phased array ultrasonic detector is a negative square wave, selecting a phased array transducer, and the wafer frequency of the ultrasonic guided wave transducer is 5MHz;
s2: the method comprises the steps of positioning and quantifying defects, detecting by adopting a longitudinal wave direct incidence film, scanning by adopting a line scanning mode, wherein the scanning angle is 0 DEG, performing C scanning coding by using the echo height of multiple waves during detection, wherein an epoxy resin-free area in a C scanning chart is red, an epoxy resin-free area is light blue or white, and the size of an image marking area is according to the size of the image marking area;
s3: filling defects, namely manufacturing a steel epoxy sleeve filling defect ultrasonic reference block according to the size of an image marking area, wherein the steel epoxy sleeve filling defect ultrasonic reference block is made of the same material and the same structure as the acoustic performance of a detected workpiece, and placing the manufactured reference block at the defect;
the size of the ultrasonic comparison test block for filling the defects of the steel epoxy sleeve is 300mm multiplied by 300mm, the upper layer is a steel arc plate with the thickness of 10mm, the middle layer is 15mm of epoxy, and the lower layer is a steel arc plate with the thickness of 10 mm;
flat bottom holes with the diameter of 25mm, the diameter of 20mm, the diameter of 15mm, the diameter of 10mm, the diameter of 8mm and the diameter of 5mm are respectively processed on the ultrasonic comparison test block for filling the defects of the steel epoxy sleeve, and all the flat bottom holes are processed to the upper steel-epoxy interface to simulate the filling defects of the steel epoxy sleeve;
s4: the detection achievement, the defect is put into to the supersound contrast test block after will detecting normally, guarantees whole normal use to detect the sleeve that can normal use, make the second contrast test block simultaneously and detect, make things convenient for whole to change after damaging, thereby guarantee whole good adaptation effect.
2. The ultrasonic detection method for filling defects of steel epoxy sleeves for oil and gas long-distance pipelines according to claim 1, which is characterized by comprising the following steps: the emission voltage of the phased array ultrasonic detector in the step S1 is 100V, the pulse emission width of the phased array ultrasonic detector is adjustable from 30ns to 1000ns, and the minimum adjustment step is 5ns.
3. The ultrasonic detection method for filling defects of steel epoxy sleeves for oil and gas long-distance pipelines according to claim 2, which is characterized by comprising the following steps: the gain adjusting range of the receiving circuit of the phased array ultrasonic detector is 110dB, and the minimum adjusting step is 0.1dB.
4. The ultrasonic detection method for filling defects of steel epoxy sleeves for oil and gas long-distance pipelines according to claim 1, which is characterized by comprising the following steps: the wafer size of the ultrasonic guided wave transducer in the step S1 is 0.6mm, the aperture size is phi 8mm, and the probe is 128 array elements.
5. The ultrasonic detection method for filling defects of steel epoxy sleeves for oil and gas long-distance pipelines according to claim 1, which is characterized by comprising the following steps: and S4, the second reference block is identical to the steel epoxy sleeve filling defect ultrasonic reference block in specification, and the second reference block and the steel epoxy sleeve filling defect ultrasonic reference block are identical in manufacturing method.
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| CN202111273995.5A CN113866274B (en) | 2021-10-29 | 2021-10-29 | Ultrasonic detection method for filling defects of steel epoxy sleeve for oil-gas long-distance pipeline |
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| CN202111273995.5A CN113866274B (en) | 2021-10-29 | 2021-10-29 | Ultrasonic detection method for filling defects of steel epoxy sleeve for oil-gas long-distance pipeline |
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