CN113075293A - B-type sleeve lap weld phased array ultrasonic detection method and system - Google Patents
B-type sleeve lap weld phased array ultrasonic detection method and system Download PDFInfo
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- CN113075293A CN113075293A CN202110255180.8A CN202110255180A CN113075293A CN 113075293 A CN113075293 A CN 113075293A CN 202110255180 A CN202110255180 A CN 202110255180A CN 113075293 A CN113075293 A CN 113075293A
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- G—PHYSICS
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Abstract
The invention discloses a phased array ultrasonic detection method and system for a B-type sleeve lap weld, belongs to the technical field of nondestructive detection, and mainly comprises phased array sound field model establishment, sound beam coverage and simulation test blocks, detection process formulation and result analysis. A B-type sleeve overlap joint weld section model is established through computer simulation software and sound beam full-coverage detection is simulated, the coverage state of an ultrasonic beam in a weld can be visually displayed, the phased array ultrasonic detection process design of the B-type sleeve overlap joint weld is effectively guided, a phased array ultrasonic triangular region analysis method is adopted to judge a defect map, the blindness of B-type sleeve overlap joint weld defect evaluation is solved, the B-type sleeve overlap joint weld phased array ultrasonic detection map for an oil and gas conveying pipeline can be accurately evaluated, the detection efficiency is improved, and the damage of a complex weld component is accurately detected.
Description
Technical Field
The invention belongs to the technical field of nondestructive testing, and relates to a B-type sleeve lap weld phased array ultrasonic testing method and system.
Background
In the early 70 s of the 20 th century, an annular sleeve is firstly used for repairing an oil and gas pipeline, the main repairing modes comprise an A type and a B type, and the structure is shown in figure 1. The sleeve repairing technology can inhibit the metal at the position of the pipeline defect from continuously expanding, and can eliminate stress concentration. The repair mode of the A-type sleeve (figure 1a) is similar to that of the composite sleeve, only surrounds the pipeline and has no sealing effect, while the repair mode of the B-type sleeve (figure 1B) can cause leakage in the service process of the repaired pipeline and can also maintain the internal pressure of the pipeline, and the method is an important and widely applied land pipeline defect repair method. The B-shaped sleeve is used as a permanent repair mode for pipeline maintenance, and has the remarkable advantages of wide application scene, no need of stopping transportation and emptying, capability of welding under pressure and small influence on gas transportation production. The B-shaped sleeve surrounds and surrounds the pipeline, has both a reinforcing effect and a sealing effect, and is widely applied to oil and gas pipeline repair. The B-shaped sleeve is formed by welding two half-tile-shaped steel pipes together and is provided with two longitudinal welding seams and two circumferential welding seams, wherein the longitudinal welding seams are general butt welding seams, and the circumferential welding seams are lap fillet welding seams.
Due to the structural characteristics of the B-type sleeve, the B-type sleeve becomes a widely applied type in the welding repair technology and is generally used for repairing defects such as cracks, pits, corrosion and the like of a pipeline in service. However, the B-type sleeve has a large residual stress during the installation process, and is prone to generating defects such as welding cracks, slag inclusions, air holes and the like at the welding seam or the heat affected zone. Therefore, it is very necessary to perform nondestructive inspection for these welding defects. In order to guarantee the repair quality of the pipeline, the defects generated in the welding process of the B-type sleeve are effectively detected. The welding seam of the B-shaped sleeve comprises a butt welding seam and an overlap welding seam, the detection technology of the butt welding seam is mature, the implementation is easy, and the details are not repeated. The B-type sleeve overlap joint weld joint detection can adopt traditional ultrasonic detection and phased array ultrasonic detection, the traditional ultrasonic detection needs a multi-angle probe and multiple detection surfaces, time and labor are wasted, the reliability of a detection result is poor, and the phased array ultrasonic detection needs to adopt computer simulation software to carry out simulation optimization detection process. The butt weld of the longitudinal weld has no technical difficulty in ultrasonic or ray detection, and the lap fillet weld of the circumferential weld has great difficulty in ultrasonic detection and ray detection.
Disclosure of Invention
The invention aims to overcome the defect that the circumferential weld joint lap fillet weld of a B-shaped sleeve is difficult to detect in the prior art, and provides a B-shaped sleeve lap weld joint phased array ultrasonic detection method and system.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a phased array ultrasonic detection method for a B-type sleeve lap weld comprises the following steps:
step 1) drawing a B-type sleeve lap weld structure diagram at different positions, and establishing a B-type sleeve lap weld section model;
step 2) carrying out fan-shaped scanning acoustic beam coverage simulation on the detection surface of the B-shaped sleeve to obtain the focusing positions of the welding seams at different positions and the position of the probe;
step 3) detecting by using a simulation test block, so that any position of a welding seam section detection area is covered by an acoustic beam to obtain a phased array ultrasonic map, and scanning process parameters of the detection process are obtained based on the phased array ultrasonic map;
and 4) utilizing a triangular region analysis method to judge the defects.
Preferably, the structure diagram of the type B sleeve lap weld in the step 1) is drawn according to the following parameters: and measuring the structure of the weld to be detected, the wall thickness of the B-shaped sleeve, the vertical thickness of the lap weld and the horizontal width of the lap weld.
Preferably, the section model of the B-shaped sleeve lap weld in the step 1) is a one-dimensional or two-dimensional array model consisting of a plurality of piezoelectric wafers; each piezoelectric wafer is an array element.
Preferably, a control unit is installed in the array model for controlling the ultrasonic transmission and reception of each array element.
Preferably, each array element is provided with an ultrasonic transmitting circuit and an ultrasonic receiving circuit.
Preferably, the detection surface of step 2) includes a sleeve side detection surface and a tube side detection surface.
Preferably, the scanning process parameter in step 3) is an angle of each endpoint of the triangular region.
Preferably, the defect determination in step 4) is specifically: when an abnormal signal exists in the triangular area, the position of the lap joint angle of the welding seam at the moment has a defect; if no abnormal signal exists in the triangular area, the lap joint angle of the welding seam at the moment is free of defects.
A B-type sleeve lap weld phased array ultrasonic testing system comprises:
the model building unit builds a cross section model of the B-shaped sleeve lap weld based on the B-shaped sleeve lap weld structure chart at different positions;
the simulation detection unit is used for carrying out phased array ultrasonic simulation detection based on the B-type sleeve overlap joint weld section model to obtain a phased array ultrasonic map;
and the analysis processing unit is used for judging the defects by utilizing a triangular region analysis method based on the phased array ultrasonic map.
Preferably, the B-type sleeve lap weld phased array ultrasonic detection system further comprises a control unit; the model building unit comprises a phased array ultrasonic transducer, and the phased array ultrasonic transducer consists of a one-dimensional or two-dimensional array formed by a plurality of piezoelectric wafers; the control unit is electrically connected with the piezoelectric wafers respectively.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a phased array ultrasonic detection method for a B-type sleeve lap weld, which mainly comprises the steps of phased array sound field model establishment, sound beam coverage and simulation test block, detection process formulation and result analysis. A B-type sleeve overlap joint weld section model is established through computer simulation software and sound beam full-coverage detection is simulated, the coverage state of an ultrasonic beam in a weld can be visually displayed, the phased array ultrasonic detection process design of the B-type sleeve overlap joint weld is effectively guided, a phased array ultrasonic triangular region analysis method is adopted to judge a defect map, the blindness of B-type sleeve overlap joint weld defect evaluation is solved, the B-type sleeve overlap joint weld phased array ultrasonic detection map for an oil and gas conveying pipeline can be accurately evaluated, the detection efficiency is improved, and the damage of a complex weld component is accurately detected.
The invention also discloses a B-type sleeve lap weld phased array ultrasonic detection system which is established based on the method, and the model establishing unit establishes a B-type sleeve lap weld section model based on B-type sleeve lap weld structure diagrams at different positions; the simulation detection unit is used for carrying out phased array ultrasonic simulation detection based on the B-type sleeve overlap joint weld section model to obtain a phased array ultrasonic map; and the analysis processing unit is used for judging the defects by utilizing a triangular region analysis method based on the phased array ultrasonic map. The system is simple in design and easy to achieve the purpose of accurately detecting the damage of the complex lap weld component of the B-shaped sleeve.
Drawings
FIG. 1 is a schematic structural diagram of a type A sleeve and a type B sleeve, (a) the type A sleeve; (b) a B-shaped sleeve;
FIG. 2 is a schematic diagram of phased array sound field simulation detection according to the present invention;
fig. 3 is a schematic diagram of phased array emitted sound beams, (a) a schematic diagram of emitted sound beam deflection; (b) the emitted sound beam is focused schematically.
FIG. 4 is a schematic diagram of a phased array reception process;
FIG. 5 is a schematic diagram of conventional ultrasonic testing and phased array ultrasonic testing, (a) conventional ultrasonic testing; (b) carrying out phased array ultrasonic detection;
FIG. 6 is a simulated view of the method of the present invention detecting acoustic beam coverage from the sleeve side and the duct side, respectively, (a) detecting simulated acoustic beam coverage from the sleeve side; (b) detecting analog acoustic beam coverage from the side of the pipeline;
FIG. 7 is a schematic diagram of a simulation block in the method of the present invention, (a) a front view of the simulation block; (b) simulating a top view of the test block;
FIG. 8 is a phased array ultrasonic inspection defect map at different locations using the method of the present invention, (a) lap weld defect map; (b) and (4) a defect map of the lap weld with the end corner.
Wherein: 1-a sleeve; 2-a pipe body; 3-longitudinal butt welding; 4-circumferential lap welding; 5-a steel pipe; 6-B type sleeve; 7-position.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
the overall structure of the B-type sleeve is shown in fig. 1B, and comprises a sleeve 1, a pipeline body 2, a longitudinal butt weld 3 and a circumferential butt weld 4.
Example 1
A phased array ultrasonic detection method for a B-type sleeve lap weld comprises the following steps:
step 1) drawing a B-type sleeve lap weld structure diagram at different positions, and establishing a B-type sleeve lap weld section model;
the structure diagram of the B-type sleeve lap weld joint is drawn according to the following parameters: and measuring the structure of the weld to be detected, the wall thickness of the B-shaped sleeve, the vertical thickness of the lap weld and the horizontal width of the lap weld.
Step 2) carrying out fan-shaped scanning acoustic beam coverage simulation on the detection surface of the B-shaped sleeve to obtain the focusing positions of the welding seams at different positions and the position of the probe;
step 3) detecting by using a simulation test block, so that any position of a welding seam section detection area is covered by an acoustic beam to obtain a phased array ultrasonic map, and scanning process parameters of the detection process are obtained based on the phased array ultrasonic map;
and 4) utilizing a triangular region analysis method to judge the defects.
When an abnormal signal exists in the triangular area, the position of the lap joint angle of the welding seam at the moment has a defect; if no abnormal signal exists in the triangular area, the lap joint angle of the welding seam at the moment is free of defects.
Example 2
The contents are the same as those of example 1 except for the following.
The section model of the B-shaped sleeve lap weld is a one-dimensional or two-dimensional array model consisting of a plurality of piezoelectric wafers; each piezoelectric wafer is an array element. The array model is provided with a control unit for controlling the ultrasonic emission and reception of each array element. And each array element is provided with an ultrasonic transmitting circuit and an ultrasonic receiving circuit.
Example 3
The contents are the same as those of example 1 except for the following.
The detection surface in the step 2) comprises a sleeve side detection surface and a pipe side detection surface. And 3) scanning process parameters are angles of all end points of the triangular area.
Example 4
The test object is a B-shaped sleeve overlap fillet weld simulation test block. The specification, combination form, welding seam form and the like of the simulation test block are the same as those of the workpiece to be detected. The simulation test block is to intercept a B-type sleeve lap fillet weld with the length of 20mm, respectively machine 7 phi 2 transverse through holes, wherein the transverse through holes 1#, 2#, 3#, 4#, 5# and 6# are respectively arranged on the bevel face, the positions are 1/3AC, 1/2AC, 2/3AC, 2/3BC, 1/2BC and 1/3BC to simulate the defects of incomplete fusion or cracks of grooves at different positions, and the transverse through hole 7# simulates the defects in the weld, as shown in FIG. 7. Through the detection of artificial defects on the simulation test block and the sound beam coverage, various welding defects generated by the B-type sleeve overlap weld can be detected, and therefore the detection rate of various defects in the B-type sleeve overlap weld is verified.
Example 5
A phased array ultrasonic detection method for a B-type sleeve lap weld comprises the following steps:
drawing a structure diagram of a B-type sleeve lap weld joint. And (3) measuring the structure of the weld to be detected, the wall thickness of the B-shaped sleeve, the vertical thickness of the lap weld and the horizontal width of the lap weld on site, and drawing the weld structures at different positions according to the size.
And (2) simulating full coverage of the sound beam. And completing phased array ultrasonic sound beam coverage simulation by adopting simulation software, and determining a focusing rule and the position of a probe adopted for detecting welding seams at different positions.
And (3) formulating a detection process. Through the sound beam covering simulation of simulation software, the full covering of the detected welding line can be realized under the process.
And (4) finishing the design of scanning process parameters according to analog simulation software. If the wall thickness of the B-shaped sleeve is 40mm, the gap between the sleeve and the steel pipe is 3mm, the vertical thickness of the seam is 40mm, and the horizontal width of the welding seam is 40mm, scanning process parameters are obtained according to simulation software and are shown in the table 1.
TABLE 1 participation number of type B sleeve lap weld scanning process
(5) And (5) judging the defects. And (3) judging the defects by adopting a triangular region analysis method.
A B-type sleeve lap weld phased array ultrasonic testing system comprises:
the model building unit builds a cross section model of the B-shaped sleeve lap weld based on the B-shaped sleeve lap weld structure chart at different positions;
the simulation detection unit is used for carrying out phased array ultrasonic simulation detection based on the B-type sleeve overlap joint weld section model to obtain a phased array ultrasonic map;
and the analysis processing unit is used for judging the defects by utilizing a triangular region analysis method based on the phased array ultrasonic map.
The B-type sleeve lap weld phased array ultrasonic detection system also comprises a control unit; the model building unit comprises a phased array ultrasonic transducer, and the phased array ultrasonic transducer consists of a one-dimensional or two-dimensional array formed by a plurality of piezoelectric wafers; the control unit is electrically connected with the piezoelectric wafers respectively.
The working principle of the system of the invention is as follows:
the phased array ultrasonic transducer is designed based on the huygens principle, the transducer is composed of a plurality of piezoelectric wafers which are mutually independent to form an array, each wafer is called an array element, generally a one-dimensional or two-dimensional array composed of a plurality of array elements, each array element is provided with an independent transmitting and receiving circuit, ultrasonic transmitting and receiving of each unit are controlled by controlling an ultrasonic system through a computer, deflection and focusing control of a synthesized sound beam are realized, and the principle of the phased array ultrasonic transducer is shown in fig. 2.
Phased array transmission is divided into phased focusing and phased deflection. The multiple transducer array elements are arranged according to a certain shape and size to form an ultrasonic array transducer, and the waveform, amplitude and phase delay of signals transmitted by each array element are respectively adjusted, so that ultrasonic sub-beams transmitted by each array element are superposed and synthesized in space, and the effects of transmitting focusing, deflecting the beams and the like are formed. As shown in fig. 3(a), the excitation timing of each array element of the array transducer is that the two end array elements are excited first, and delay is gradually increased towards the middle array element, so that the synthesized wave front points to a curvature center, i.e. transmitting phased focusing, as shown in fig. 3(b), the excitation timing of each array element of the array transducer is that transmitting delay is increased at equal intervals, so that the synthesized wave front has a pointing angle, and the phased deflection effect of the transmitted sound beam is formed.
The phased array receives ultrasonic waves transmitted by the transducer, and echo signals are generated after the ultrasonic waves meet a target, and the time of the echo signals reaching each array element is different. The received signals of each array element are subjected to delay compensation according to the time difference of the echo reaching each array element, and then are added and synthesized, so that the echo signals in a specific direction can be superposed and enhanced, and the echo signals in other directions can be weakened or even cancelled. Meanwhile, various phase control effects such as focusing, aperture changing and apodization are formed by methods such as phase and amplitude control of each array element and sound beam forming. The principle of phased array reception is shown in fig. 4.
Application example 1
The B-type sleeve is generally repaired under the non-stop state, and for the lap fillet weld of the circumferential weld, the wall thickness of the pipeline body and the thickness of the B-type sleeve are subjected to double-wall single-image transillumination, so that firstly, the transillumination wall thickness is too large, and firstly, the structural form characteristic of the lap weld is less in possibility of finding defects by ray detection. As shown in figure 5(a), the conventional ultrasonic detection is that the detection of the lap fillet weld of the B-type sleeve 6 is carried out at 3 different positions 7, each position 7 adopts 3 different angles, the detection is time-consuming and low in efficiency, and the defect detection rate is low. Phased array ultrasonic testing as shown in fig. 5(B) can be performed at one position, and the detection of the lap fillet weld of the B-shaped sleeve 6 can be performed on the B-shaped sleeve 6 or on the body of the steel pipe 5, and is recommended to be performed on the B-shaped sleeve 6 preferentially. If the detection is carried out on the steel pipe 5, the B-shaped sleeve 6 is repaired without stopping conveying, natural gas is conveyed in the pipeline, ultrasonic waves are absorbed to a certain extent, and the detection sensitivity is influenced.
Application example 2
And establishing a B-type sleeve overlap fillet weld section model by using simulation software, selecting a corresponding detection surface according to a detection process, and performing sector scanning acoustic beam coverage simulation, wherein the detection process is set to ensure that any position of a weld section detection area is covered by an acoustic beam. The simulation software can verify the rationality of the detection process, thereby providing theoretical guidance for detecting the fillet weld of the B-type sleeve.
The simulation diagram for scanning the acoustic beam coverage from the side of the B-type sleeve is shown in fig. 6(a), the schematic diagram for scanning the acoustic beam coverage from the side of the pipeline is shown in fig. 6(B), and the simulation diagram can be seen from fig. 6: when the scanning surface of the probe is the side of the B-shaped sleeve, the sound beam can cover the whole overlap fillet weld of the B-shaped sleeve through primary reflection and secondary reflection, so that various defects can be generated, and a detection blind area is avoided; when the scanning surface of the probe is the side of the pipeline pipe body, the sound beam can cover the whole lap fillet weld of the B-type sleeve through secondary reflection, various defects can be caused, and therefore a detection blind area does not exist.
On the basis of simulation, a simulation test block is used for detection, and the detection rate and accuracy of phased array ultrasound on various defects of the lap fillet weld of the B-type sleeve are further confirmed.
Application example 3
The B-shaped sleeve has the characteristics of continuous conveying, safety and quickness in long-distance pipeline repair, and welding defects or cracks are easily generated due to the complex structure of welding seams and large internal stress and residual stress. In order to prevent the detection omission of the defects, the cross section of the lap joint weld of the B-type sleeve is detected by phased array ultrasonic sector scanning, so that the whole weld sound beam full-coverage detection is realized, the detection process design is required to be carried out through analog simulation, the detection efficiency is improved, and the reliability of the detection result is ensured.
The typical B-type sleeve lap weld phased array ultrasonic detection sector scanning is obtained by scanning through a certain angle range by using the same array elements and the same focal length, wherein the horizontal axis corresponds to the projection distance (test piece width), and the vertical axis corresponds to the depth. A phased array ultrasonic map analysis method, namely a phased array ultrasonic triangular region analysis method, is provided for completing defect judgment by combining the structural characteristics of a B-type sleeve lap weld. The principle is that the sound beam coverage area is determined according to the reflected wave of the fixed position of the detected welding seam, so that whether defects exist in the area is judged. According to the sound beam simulation effect of the lap weld of the B-type sleeve, the tested weld changes along with the position, the phased array ultrasound can realize multi-angle coverage, and when the phased array ultrasound sound beam coverage simulation is carried out, the fact that the same or similar angle coverage structure triangle A, B, C end points exist when the phased array ultrasound probe keeps unchanged with the horizontal position of the weld (as shown in figure 6) is found. According to analog simulation software, when the detection process is adopted for detection, reflected waves of an end point A can be found in the 37-degree sound beam direction of a phased array ultrasonic fan-shaped scanning map, reflected waves of an end point C can be found in the 52.5-degree sound beam direction of the fan-shaped scanning map, and reflected waves of an end point B can be found in the 65.5-degree sound beam direction of the fan-shaped scanning map. Namely, the area covered by the sound beam at 37-66 degrees can be found to be the B-type sleeve lap weld needing to be detected through analog simulation software. As most defects generated by the lap welding seam of the B-type sleeve are in the ABC triangle, whether the defect exists in the area can be judged by mainly observing whether an abnormal signal exists in the area of the ABC triangle in the actual detection process, and the method can be named as a triangular area analysis method.
And (3) analyzing a detection result: the detection objects are the long-distance pipeline specification phi 1219 multiplied by 25.7mm, the steel grade X80 and the B-type sleeve wall thickness 40mm (as shown in figure 1B). The phased array ultrasonic test adopts probes with the frequency of 5MHz, 32 array elements and the spacing of 0.5 mm; the inclination angle of the transverse wave wedge block is 35 degrees, the sound velocity is 2338m/s, and the nominal value of the maximum deflection range is 37-66 degrees. For the detection result, a sector map scanned by a triangular region analysis method is analyzed, a phased array ultrasonic detection map of the internal defect of the welding seam is detected, as shown in fig. 8, if the end point of the triangle has a defect, the defect is not judged to be the welding seam defect, and the defect is actually caused by end point reflected waves (as shown in fig. 8 b). When the welding seam is detected, whether the welding defect exists in the position can be visually distinguished by adopting a phased array ultrasonic detection technology, so that the detection rate is greatly improved, and the problem that the detection of the B-type sleeve overlap welding seam defect is difficult to judge is well solved.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A B-type sleeve lap weld phased array ultrasonic detection method is characterized by comprising the following steps:
step 1) drawing a B-type sleeve lap weld structure diagram at different positions, and establishing a B-type sleeve lap weld section model;
step 2) carrying out fan-shaped scanning acoustic beam coverage simulation on the detection surface of the B-shaped sleeve to obtain the focusing positions of the welding seams at different positions and the position of the probe;
step 3) detecting by using a simulation test block, so that any position of a welding seam section detection area is covered by an acoustic beam to obtain a phased array ultrasonic map, and scanning process parameters of the detection process are obtained based on the phased array ultrasonic map;
and 4) utilizing a triangular region analysis method to judge the defects.
2. The phased array ultrasonic testing method for the B-type sleeve lap weld according to claim 1, wherein the structure diagram of the B-type sleeve lap weld of step 1) is drawn according to the following parameters: and measuring the structure of the weld to be detected, the wall thickness of the B-shaped sleeve, the vertical thickness of the lap weld and the horizontal width of the lap weld.
3. The phased array ultrasonic testing method for the B-type sleeve lap weld according to claim 1, characterized in that the section model of the B-type sleeve lap weld in step 1) is a one-dimensional or two-dimensional array model composed of a plurality of piezoelectric wafers; each piezoelectric wafer is an array element.
4. The phased array ultrasonic testing method for the B-type sleeve lap weld according to claim 3, characterized in that a control unit is installed in the array model and used for controlling the ultrasonic emission and reception of each array element.
5. The phased array ultrasonic testing method for the B-type sleeve lap weld according to claim 3, wherein each array element is provided with an ultrasonic transmitting circuit and an ultrasonic receiving circuit.
6. The phased array ultrasonic testing method for the B-type sleeve lap weld according to claim 1, wherein the testing surface of step 2) comprises a sleeve side testing surface and a pipe side testing surface.
7. The phased array ultrasonic testing method for the B-type sleeve lap weld according to claim 1, wherein the scanning process parameter in step 3) is the angle of each end point of a triangular area.
8. The phased array ultrasonic detection method for the B-type sleeve lap weld according to claim 1, wherein the defect judgment in the step 4) is specifically as follows: when an abnormal signal exists in the triangular area, the position of the lap joint angle of the welding seam at the moment has a defect; if no abnormal signal exists in the triangular area, the lap joint angle of the welding seam at the moment is free of defects.
9. The utility model provides a B type sleeve overlap joint welding seam phased array ultrasonic testing system which characterized in that includes:
the model building unit builds a cross section model of the B-shaped sleeve lap weld based on the B-shaped sleeve lap weld structure chart at different positions;
the simulation detection unit is used for carrying out phased array ultrasonic simulation detection based on the B-type sleeve overlap joint weld section model to obtain a phased array ultrasonic map;
and the analysis processing unit is used for judging the defects by utilizing a triangular region analysis method based on the phased array ultrasonic map.
10. The type B sleeve lap weld phased array ultrasonic testing system of claim 9, wherein the type B sleeve lap weld phased array ultrasonic testing system further comprises a control unit; the model building unit comprises a phased array ultrasonic transducer, and the phased array ultrasonic transducer consists of a one-dimensional or two-dimensional array formed by a plurality of piezoelectric wafers; the control unit is electrically connected with the piezoelectric wafers respectively.
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Cited By (2)
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| CN113866274A (en) * | 2021-10-29 | 2021-12-31 | 国家石油天然气管网集团有限公司 | Ultrasonic detection method for filling defects of steel epoxy sleeve for oil and gas long-distance pipeline |
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| CN113866274B (en) * | 2021-10-29 | 2024-02-13 | 国家石油天然气管网集团有限公司 | Ultrasonic detection method for filling defects of steel epoxy sleeve for oil-gas long-distance pipeline |
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