CN115047071A - Detection device and detection method for plug-in fillet weld of thick-wall pressure-bearing equipment - Google Patents

Detection device and detection method for plug-in fillet weld of thick-wall pressure-bearing equipment Download PDF

Info

Publication number
CN115047071A
CN115047071A CN202210574706.3A CN202210574706A CN115047071A CN 115047071 A CN115047071 A CN 115047071A CN 202210574706 A CN202210574706 A CN 202210574706A CN 115047071 A CN115047071 A CN 115047071A
Authority
CN
China
Prior art keywords
phased array
array probe
detection
fillet weld
probe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210574706.3A
Other languages
Chinese (zh)
Inventor
郭伟灿
唐萍
陶杨吉
缪存坚
凌张伟
滕国阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Institute of Special Equipment Science
Original Assignee
Zhejiang Institute of Special Equipment Science
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Institute of Special Equipment Science filed Critical Zhejiang Institute of Special Equipment Science
Priority to CN202210574706.3A priority Critical patent/CN115047071A/en
Publication of CN115047071A publication Critical patent/CN115047071A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
    • G01N29/0654—Imaging
    • G01N29/069—Defect imaging, localisation and sizing using, e.g. time of flight diffraction [TOFD], synthetic aperture focusing technique [SAFT], Amplituden-Laufzeit-Ortskurven [ALOK] technique
    • 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
    • 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
    • G01N29/221—Arrangements for directing or focusing the acoustical waves
    • 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
    • G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material

Landscapes

  • 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 a detection method and a detection device for a fillet weld of an inserted pipe seat of thick-wall pressure-bearing equipment, which are suitable for the technical field of nondestructive detection of pressure-bearing equipment. The detection device comprises a transmitting phased array probe, a receiving phased array probe, a wedge block group, an ultrasonic detector and a manual scanning frame. The detection method based on the detection device can detect various defects of the fillet weld of the tube seat, particularly area defects such as transverse cracks. The detection method of the fillet weld of the plug-in pipe seat comprises the steps of placing a detection device in a connecting pipe for circumferential scanning, reducing a detection blind area by transmitting and receiving a double-phased array probe through a transmitting-receiving ultrasonic signal, improving the signal-to-noise ratio through an electronic scanning technology, and solving the detection problem of transverse cracks through a TOFD technology.

Description

Detection device and detection method for plug-in fillet weld of thick-wall pressure-bearing equipment
[ technical field ] A
The invention relates to the technical field of nondestructive testing of pressure-bearing equipment, in particular to a detection device and a detection method for an insertion type fillet weld of thick-wall pressure-bearing equipment.
[ background ] A method for producing a semiconductor device
The cylinder body and the adapter tube of important thick-wall pressure-bearing equipment such as a power station boiler and the like usually adopt an inserted structure, the inserted structure bears welding stress, structural stress, shearing force and thermal stress generated by high-temperature fluctuation, and equipment failure can be caused once defects are generated.
The insertion structure is usually detected by ultrasonic detection, and the conventional ultrasonic detection technology is generally detected by one or a combination of the following methods: detecting the inner wall of the connecting pipe by adopting a straight probe; detecting by using primary and secondary waves on the outer wall of the container barrel by adopting an inclined probe; and detecting the inner wall of the connecting pipe by using a primary wave by using an inclined probe. However, the conventional ultrasonic detection technology has the problems that interference waves and defect waves are difficult to distinguish, the defect signal identification difficulty is high, the curvature change of a reflection point causes the defect positioning difficulty, part of welding seams are missed to detect and the like. The ultrasonic phased array detection can control the focusing and deflection of an acoustic beam to realize the multidimensional display of detection results, and one or more of the following modes are selected to be combined to implement the detection according to the structure form of the fillet weld of the insertion type tube seat, and the method comprises the following steps: adopting line scanning on the inner wall of the connecting pipe; adopting fan scanning on the outer wall or the inner wall of the container; fan scanning is used on the inner wall of the container. But the ultrasonic phased array detection method has lower reliability for detecting transverse cracks of the welding seam. In relevant standards and teaching materials, ultrasonic phased array detection of transverse cracks of a welding seam generally adopts oblique parallel scanning along the welding seam or parallel scanning after the welding seam is ground to be flat. However, the ultrasonic phased array detection has the following problems aiming at the transverse cracks of the fillet weld of the plug-in pipe seat of the thick-wall pressure-bearing equipment: 1) the wall thickness is thicker, the diameter of the common connecting pipe is smaller, and the oblique parallel scanning along the welding seam or the parallel scanning after the welding seam is worn and flattened deviates from the circular welding seam when the sound beam reaches a certain sound path; 2) the fillet weld height of the plug-in pipe seat of the thick-wall pressure-bearing equipment is usually taken into account of part of strength calculation, the fillet weld height is large, and the residual height is difficult to polish and flatten. Therefore, the existing detection standard and process are difficult to carry out effective ultrasonic detection on the transverse cracks of the fillet weld of the plug-in pipe seat of the thick-wall pressure-bearing equipment.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provides a detection device and a detection method for an insertion type fillet weld of thick-wall pressure-bearing equipment.
In order to achieve the purpose, the invention provides a detection device for an insertion type fillet weld of thick-wall pressure-bearing equipment, which comprises a transmitting phased array probe, a receiving phased array probe, a wedge block group, an ultrasonic detector and a manual scanning frame for positioning. The transmitting phased array probe and the receiving phased array probe have the same specification and are symmetrically arranged above the wedge block group; the manual scanning frame is adsorbed on the inner wall of the connecting pipe and comprises a main body frame, a probe mounting frame, a magnetic roller and an encoder.
Preferably, the method can be used for detecting the insertion fillet weld formed by the cylinder and the adapter of the thick-wall pressure bearing equipment.
Preferably, the wedge block set consists of two wedge blocks symmetrically arranged on the probe mounting rack.
Preferably, the bottom surface of the wedge block is an outward convex arc surface matched with the inner wall of the connecting pipe.
Preferably, the probe mounting brackets are mounted at the front end of the body frame, and the probe mounting brackets are symmetrically distributed about the symmetry axis of the body frame.
Preferably, the magnetic rollers are uniformly distributed on two sides of the main body frame.
Preferably, the ultrasonic detector integrates TOFD and phased array functions, and is connected with the transmitting phased array probe and the receiving phased array probe through probe lines.
The invention also provides a detection method of the plug-in fillet weld of the thick-wall pressure-bearing equipment, which adopts the detection device and comprises the following steps:
s1, removing sundries in the scanning area of the inner wall of the connecting pipe, and placing a coupling agent;
s2, arranging the detection device on the inner wall of the connecting pipe, and arranging the transmitting phased array probe and the receiving phased array probe above the insertion fillet weld;
s3, starting the ultrasonic detection instrument, and enabling the receiving phased array probe to receive the sound beam of the transmitting phased array probe in the circumferential direction of the adapter tube through the transmitting phased array probe and the receiving phased array probe with well designed wafer angles and positions, wherein the half diffusion angle covers the width of an angle weld;
s4, in the axial direction of the connecting pipe of any scanning point, the transmitting phased array probe and the receiving phased array probe perform electronic line scanning and electronic fan scanning of equal-depth focusing in the axial direction of the connecting pipe according to the same focusing rule, and corresponding transmitting and receiving sound beams are formed on the same focusing point;
s5, scanning the transmitting phased array probe, the receiving phased array probe and the wedge block group along the clockwise/counterclockwise direction of the circumference by manually rotating the manual scanning frame; the detection and defect positioning in the axial direction of the connecting pipe are realized through electronic scanning, the detection and defect positioning in the radial direction of the connecting pipe are realized through TOFD detection, the detection and defect positioning in the circumferential direction are realized through an encoder, and finally C scanning and 3D real-time imaging are realized.
Preferably, the wafer deflection angle δ is calculated by the equation for the inner or outer boundary of the sound field:
Figure BDA0003661633120000031
the wafer half-diffusion angle formula is:
Figure BDA0003661633120000032
the formula for the center position of the wafer in the probe width direction is:
Figure BDA0003661633120000033
Figure BDA0003661633120000034
where δ is a deflection angle of the wafer, β is a refraction angle (β) of an internal or external diffusion boundary of the ultrasonic wave on the test object 1 Is the inner boundary, beta 2 Is an outer boundary), r is the radius of the inner surface of the connecting pipe, l is the range of a heat affected zone, e-5 is more than or equal to l is more than or equal to e + d +5, e is the wall thickness of the connecting pipe, C L1 Is the longitudinal wave velocity of the wedge, C L2 Is the longitudinal sound velocity of the workpiece to be inspected, theta is the half-spread angle in the wedge, d is the width of the weld, lambda is the wavelength of the ultrasonic wave, f is the frequency of the wafer-emitted sound wave, b is half the width of the wafer, (x) O1 ,y O1 ) The wafer center position O1 is emitted.
Compared with the prior art, the detection device and the detection method for the plug-in fillet weld of the thick-wall pressure-bearing equipment have the beneficial effects that:
1. the invention adopts a phased array focusing technology, and carries out electronic line scanning and electronic sector scanning in the axial direction of the connecting pipe through an electronic scanning technology, wherein the scanning sound beam covers the whole thickness of a welding seam, and sound energy is concentrated to improve the signal-to-noise ratio; the detection blind area is reduced by adopting a one-shot double-probe technology, and the defects of longitudinal cracks, incomplete penetration, incomplete fusion, air holes, slag inclusion and the like can be detected.
2. The invention adopts the TOFD technology, the sound beam only needs to cover the heat affected zone of the fillet weld, the sound field energy is more concentrated, the detection sensitivity is higher, the direct wave and the bottom reflected wave are effectively removed, and the difficult problem of detecting the area type defects of the fillet weld such as transverse cracks is solved.
3. The invention combines the phased array detection result, the TOFD detection result and the encoder to realize more accurate positioning and quantification of the defects. Positioning defects in the thickness direction of the welding seam and quantifying the height of the defects through a phased array detection result; the defects in the width direction of the weld joint are positioned and the length of the defects is quantified through a TOFD detection result; and the defect condition in the circumferential direction is dynamically presented through an encoder of a manual scanning frame, so that the defect positioning in the circumferential direction and the defect width quantification are realized.
4. The invention adopts the split wedge block group, the two independent wedge blocks in the wedge block group are respectively assembled with the phased array probe in a split way on the basis of realizing multiple functions of curved surface matching, sound beam covering, double-probe detection and the like, the wedge blocks are convenient to replace after being worn, and the curvature of the wedge blocks can be adjusted to adapt to the heat affected zone ranges of different connecting pipe inner diameters and pipe seat fillet welds.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a detection device for a plug-in fillet weld of thick-wall pressure-bearing equipment according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a transmitting phased array probe, a receiving phased array probe, and a wedge group according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of the sound field structure of the phased array and TOFD probe apparatus of the present invention.
FIG. 4 is a schematic diagram of a sound field local amplification structure of the phased array/TOFD probe apparatus according to the present invention.
FIG. 5 is a three-dimensional line scan diagram of the present invention.
FIG. 6 is a two-dimensional line scan diagram of the present invention.
FIG. 7 is a three-dimensional view of a fan scan according to the present invention.
FIG. 8 is a two-dimensional view of a fan scan according to the present invention
FIG. 9 is a schematic diagram of defect detection and detection results according to the TOFD principle in the present invention.
In the figure: 1. taking over a pipe; 2. a magnetic roller; 3. a probe mounting bracket; 4. a plug-in fillet weld; 5. a cylinder body; 6. transmitting a phased array probe; 7. a wedge block set; 8. receiving a phased array probe; 9. an encoder; 10. a main body frame; 11. provided is an ultrasonic detector.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships in which the products of the present invention are conventionally placed when used, and are merely used for convenience of describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the embodiment of the invention provides a detection device for an insertion type fillet weld of thick-wall pressure-bearing equipment, which comprises a transmitting phased array probe 6, a receiving phased array probe 8, an ultrasonic detector 11, a wedge block group 7 and a manual scanning frame for positioning. The transmitting phased array probe 6 and the receiving phased array probe 8 have the same specification and are symmetrically arranged above the wedge block group 7 so as to realize double-probe detection. The manual scanning frame is adsorbed on the inner wall of the connecting pipe and comprises a main body frame 10, a probe mounting frame 3, a magnetic roller 2 and an encoder 9 so as to push the detection device to scan.
Referring to fig. 1, in an alternative embodiment, the inspection apparatus can be used to detect transverse cracks and other types of defects in a plug-in fillet weld 4 formed by a barrel 5 and a nozzle 1 of a thick-walled pressure containing device.
Referring to fig. 1, in an alternative embodiment, the probe mounting frames 3 are mounted at the front end of the main body frame 10, symmetrically distributed about the symmetry axis of the main body frame 10. The magnetic rollers 2 are strong magnetic rollers and are uniformly distributed on two sides of the main body frame 10, so that the manual scanning frame is adsorbed on the inner wall of the connecting pipe 1. The encoder 9 is installed at the front end of the center of the probe installation frame 3, is in communication connection with the ultrasonic detector 11, and is used for positioning and detecting positions.
Referring to fig. 1 and 2, in an alternative embodiment, the wedge set 7 is composed of two wedges symmetrically installed on the probe mounting rack, and the bottom surface of the wedge set 7 is an outer convex arc surface matched with the inner concave arc surface of the adapter tube, so as to realize curved surface matching; the probe mounting surfaces of the wedge block group 7 are two symmetrical surfaces, and the height, the distance and the inclination angle of the wedge block group are determined by calculating the position of a wafer and the deflection angle. The length of the wedge block is adapted to the length of the probe, and the whole welding seam thickness can be covered by the scanning sound beam through electronic line scanning and fan scanning technologies; the width of the wedge is matched with that of the probe, and the sound propagation path can be completely propagated in the wedge, so that the sound field can cover the whole weld width.
Referring to fig. 1, in an alternative embodiment, the ultrasonic testing apparatus 11 integrates TOFD and phased array functions and is connected to the transmitting phased array probe 6 and the receiving phased array probe 8 by probe wires.
The detection method of the plug-in fillet weld of the thick-wall pressure-bearing equipment uses the detection device and comprises the following steps:
and S1, removing the cleaning impurities in the inner wall scanning area of the adapter tube 1, and placing a coupling agent.
S2, arranging the detection device on the inner wall of the adapter tube 1, and arranging the transmitting phased array probe 6 and the receiving phased array probe 8 above the insertion type fillet weld 4.
S3, starting the ultrasonic detection instrument 11, and enabling the receiving phased array probe 8 to receive the sound beam of the transmitting phased array probe 6 in the circumferential direction of the adapter tube 1 through the transmitting phased array probe 6 and the receiving phased array probe 8 with the designed wafer angles and positions, wherein the half diffusion angle covers the width of the insertion type fillet weld 4.
S4, in the axial direction of the connecting pipe of any scanning point, the transmitting phased array probe 6 and the receiving phased array probe 8 perform electronic line scanning and electronic fan scanning of equal depth focusing in the axial direction of the connecting pipe according to the same focusing rule, and form corresponding transmitting and receiving acoustic beams on the same focusing point.
And S5, manually rotating the manual scanning frame to scan the transmitting phased array probe 6, the receiving phased array probe 8 and the wedge block group 7 along the clockwise/anticlockwise direction of the circumference. The detection and defect positioning in the axial direction of the connecting pipe 1 are realized through electronic scanning, the detection and defect positioning in the radial direction of the connecting pipe 1 are realized through TOFD detection, the detection and defect positioning in the circumferential direction are realized through the encoder 9, and finally C scanning and 3D real-time imaging are realized.
Wherein, the calculation formula of the wafer deflection angle delta passing through the inner boundary or the outer boundary of the sound field is as follows:
Figure BDA0003661633120000081
the wafer half-spread angle formula is:
Figure BDA0003661633120000082
the formula for the center position of the wafer in the probe width direction is:
Figure BDA0003661633120000083
Figure BDA0003661633120000084
where δ is a deflection angle of the wafer, β is a refraction angle of an internal or external diffusion boundary of the ultrasonic wave on the object, and β is 1 Is the inner boundary, beta 2 Is an outer boundary, r is the radius of the inner surface of the connecting pipe, l is the range of a heat affected zone, e-5 is more than or equal to l is more than or equal to e + d +5, e is the wall thickness of the connecting pipe, C L1 Is the longitudinal wave velocity of the wedge, C L2 Is the longitudinal sound velocity of the workpiece to be inspected, theta is the half-spread angle in the wedge, d is the width of the weld, lambda is the wavelength of the ultrasonic wave, f is the frequency of the wafer-emitted sound wave, b is half the width of the wafer, (x) O1 ,y O1 ) The wafer center position O1 is emitted.
The detection method is specifically described by different figures.
Referring to fig. 3, the wafer of the transmission phased array probe 6 is incident at a certain angle in the circumferential direction (passive aperture direction), and generates a diffused longitudinal wave at a certain angle in the wedge and refracts it to the workpiece. The wafer of the receiving phased array probe 8 is symmetrically arranged with the wafer of the transmitting phased array probe 6 in the circumferential direction, and receives diffraction echoes in the workpiece. In order to detect the transverse cracks of the insertion type fillet weld 4, the position and the deflection angle of a probe wafer are designed, so that a sound field covers the weld to be detected and a heat affected zone.
In FIG. 4, the weld to be detected and the heat affected zone (S1-S2) are used as the target area for the diffusion and refraction of the longitudinal wave sound field, the inner boundary (O1P1) of the diffused sound field just covers the target area S1, and the outer boundary (O1P2) just covers the target area S2. The wafer deflection angle δ can be formulated by either the inner boundary or the outer boundary of the acoustic field.
Figure BDA0003661633120000091
Beta is the refraction angle of the inner or outer diffusion boundary of the ultrasonic wave on the detected workpiece, and the refraction angle beta of the inner boundary 1 And an outer boundary angle of refraction beta 2 。
In the invention, the deflection angle delta of the wafer is 0 degree, the sound beam radiated by the wafer vertically enters the wedge block, and the incident sound beam is deflected through the contact curved surface of the wedge block and the inner surface of the connecting pipe. The inner boundary O1P1 of the diffuse sound field is horizontally symmetrical to the outer boundary O1P 2.
Calculating the half-diffusion angle of the wafer radiation sound wave in the width direction of the probe in the wedge block of the sound wave at the current frequency according to the formula
Figure BDA0003661633120000092
And respectively obtaining equations of the inner boundary O1P1 and the outer boundary O1P2 by calculating the intersection point of the diffusion sound field and the inner wall of the connecting pipe, wherein the intersection point of the two equations is the central position O1 of the emitting wafer.
Figure BDA0003661633120000101
Figure BDA0003661633120000102
The wafer center position O2 and the deflection angle of the receiving phased array probe 8 are horizontally symmetrical to the wafer of the transmitting phased array probe 6. The calculation method is applied to the position and angle calculation of the transmitting phased array probe 6 and the receiving phased array probe 8, so that the diffused sound beam can cover the width of the welding seam, and the detection sensitivity is improved.
During detection, sundries in the scanning area of the inner wall of the connecting pipe 1 are removed, the ultrasonic coupling agent is applied, the detection device is arranged on the inner wall of the connecting pipe 1, and the manual scanning frame is manually pushed to scan the detection device along the circumferential direction, wherein the scanning direction comprises a clockwise direction and a counterclockwise direction. As shown in fig. 5 and 6, in the axial direction (active aperture direction) of the connection tube at any scanning point, the transmitting phased array probe 6 and the receiving phased array probe 8 perform electronic line scanning according to the same focusing rule, and form corresponding transmitting and receiving acoustic beams at the same focusing point. Each group of array elements in the transmitting phased array probe 6 transmits ultrasonic waves to be superposed to form a new wave front, and the new wave front is focused at a specific position; when the transmitted ultrasonic waves are incident to the defects, pulse reflection signals can be generated; this reflected signal is received by the receiving phased array probe 8. Through a one-transmitting-one-receiving double-probe technology and a focusing method, the blind area is reduced, the sound energy concentration area is utilized to improve the signal to noise ratio, and the defects of longitudinal cracks, incomplete penetration, incomplete fusion, air holes, slag inclusion and the like can be detected. The detection signal obtained by the receiving phased array probe 8 is imaged by two ultrasonic imaging modes: 1) synthesizing and imaging all signals according to a phased array principle; 2) the signals transmitted and received at one time are imaged according to the TOFD principle, and the line scanning in the direction of the active aperture is taken as the axial movement of the probe to replace the conventional axial scanning of the TOFD probe.
In fig. 5, the adapter tube 1 is flush with the inner wall of the cylinder 5 and has a chamfer, and the electron beam scanning cannot completely cover the welding seam on the inner wall side of the cylinder 5. Therefore, electronic fan scanning is required, and as shown in fig. 7 and 8, in order to make the sound beam cover the weld seam on the inner wall side of the cylinder 5, the transmitting phased array probe 6 and the receiving phased array probe 8 simultaneously adopt electronic fan scanning of equal-depth focusing in the axial direction, and corresponding transmitting and receiving sound beams are formed on the same focusing point. The detection signal obtained by the phased array probe 8 is still imaged by two ultrasonic imaging modes of phased array and TOFD. By combining the electronic line scanning and electronic fan scanning technologies, the sound beam focusing area covers the thickness of the welding seam, and the positioning of the defects in the thickness direction of the welding seam and the quantification of the height of the defects are realized.
The TOFD detection principle is shown in FIG. 9, the inner wall of the adapter 1 is concave, the near surface area is far away from the heat affected zone, and the sound beam does not need to cover the near surface; the side of the cylinder body 5 is a base material non-detection area, and the sound beam does not need to cover the outer surface and the near outer surface. The method removes the reflected waves on the inner surface and the outer surface, has no detection blind area, and requires a small sound beam diffusion angle. At a non-defective site, the receiving probe will not receive the reflected signal; at the defect site (such as the thick black line part in fig. 9), the receiving probe will receive the diffraction wave signals at the upper end and the lower end of the defect, and can visually and simultaneously graphically represent the upper end and the lower end of the defect. The coverage range of the sound field is only a heat affected zone and a TOFD imaging mode, the sound field energy is more concentrated, the detection sensitivity is higher, reflected waves on the inner surface and the outer surface are effectively removed, and area defects such as transverse cracks can be detected.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. The utility model provides a detection apparatus for bayonet fillet weld of thick wall pressure-bearing equipment which characterized in that: the device comprises a transmitting phased array probe (6), a receiving phased array probe (8), a wedge block group (7), an ultrasonic detector (11) and a manual scanning frame for positioning; the transmitting phased array probe (6) and the receiving phased array probe (8) have the same specification and are symmetrically arranged above the wedge block group (7); the manual scanning frame is adsorbed on the inner wall of the connecting pipe (1) and comprises a main body frame (10), a probe mounting frame (3), a magnetic roller (2) and an encoder (9).
2. The apparatus for detecting plunge fillet weld of thick-walled pressure-bearing equipment as set forth in claim 1, wherein: the method can be used for detecting the insertion type fillet weld (4) formed by the cylinder (5) and the adapter tube (1) of the thick-wall pressure-bearing equipment.
3. The apparatus for detecting plunge fillet weld of thick-walled pressure-bearing equipment as set forth in claim 1, wherein: the wedge block group (7) is composed of two wedge blocks which are symmetrically arranged on the probe mounting rack (3).
4. The apparatus for detecting plunge fillet weld of thick-walled pressure-bearing equipment as set forth in claim 3, wherein: the bottom surface of the wedge block is an outward convex arc surface matched with the inner wall of the connecting pipe (1).
5. The apparatus for detecting plunge fillet weld of thick-walled pressure-bearing equipment as set forth in claim 1, wherein: the probe mounting rack (3) is mounted at the front end of the main body frame (10), and the probe mounting rack (3) is symmetrically distributed about the symmetry axis of the main body frame (10).
6. The apparatus for detecting plunge fillet weld of thick-walled pressure-bearing equipment as set forth in claim 5, wherein: the magnetic rollers (2) are uniformly distributed on two sides of the main body frame (10).
7. The apparatus for detecting plunge fillet weld of thick-walled pressure-bearing equipment as set forth in claim 1, wherein: the ultrasonic detector (11) integrates TOFD and phased array functions, and is connected with the transmitting phased array probe (6) and the receiving phased array probe (8) through probe lines.
8. A detection method for an insertion type fillet weld of thick-wall pressure-bearing equipment is characterized by comprising the following steps: a detection device of a plug-in fillet weld using the thick-wall pressure-bearing equipment of any one of claims 1 to 7, comprising the following steps:
s1, removing impurities in the scanning area of the inner wall of the adapter tube (1), and placing a coupling agent;
s2, arranging the detection device on the inner wall of the adapter tube (1), and arranging the transmitting phased array probe (6) and the receiving phased array probe (8) above the insertion fillet weld (4);
s3, starting the ultrasonic detection instrument (11), and enabling the receiving phased array probe (8) to receive the sound beam of the transmitting phased array probe (6) in the circumferential direction of the adapter tube (1) through the transmitting phased array probe (6) and the receiving phased array probe (8) with the designed wafer angles and positions, wherein the half diffusion angle covers the width of the insertion type fillet weld (4);
s4, in the axial direction of the connecting pipe (1) of any scanning point, the transmitting phased array probe (6) and the receiving phased array probe (8) perform electronic line scanning and electronic fan scanning of equal-depth focusing in the axial direction of the connecting pipe according to the same focusing rule, and form corresponding transmitting and receiving acoustic beams on the same focusing point;
s5, scanning the transmitting phased array probe (6), the receiving phased array probe (8) and the wedge block group (7) along the clockwise and anticlockwise directions of the circumference by manually rotating the manual scanning frame; the detection and defect positioning in the axial direction of the connecting pipe (1) are realized through electronic scanning, the detection and defect positioning in the radial direction of the connecting pipe (1) are realized through TOFD detection, the detection and defect positioning in the circumferential direction are realized through the encoder (9), and finally C scanning and 3D real-time imaging are realized.
9. The method of detecting a plunge fillet weld of a thick-walled pressure-bearing device of claim 8, wherein: the wafer deflection angle δ is calculated by the inner boundary or the outer boundary of the sound field as follows:
Figure FDA0003661633110000021
the wafer half-diffusion angle formula is:
Figure FDA0003661633110000022
the formula for the center position of the wafer in the probe width direction is:
Figure FDA0003661633110000031
Figure FDA0003661633110000032
where δ is a deflection angle of the wafer, β is a refraction angle of an internal or external diffusion boundary of the ultrasonic wave on the object, and β is 1 Is the inner boundary, beta 2 Is an outer boundary, r is the radius of the inner surface of the connecting pipe, l is the range of a heat affected zone, e-5 is more than or equal to l is more than or equal to e + d +5, e is the wall thickness of the connecting pipe, C L1 Is the longitudinal wave velocity of the wedge, C L2 Is the longitudinal sound velocity of the workpiece to be inspected, theta is the half diffusion angle in the wedge, d is the width of the weld, lambda is the wavelength of the ultrasonic wave, f is the frequency of the wafer-emitted sound wave, b is half the width of the wafer, (x) O1 ,y O1 ) The wafer center position O1 is emitted.
CN202210574706.3A 2022-05-25 2022-05-25 Detection device and detection method for plug-in fillet weld of thick-wall pressure-bearing equipment Pending CN115047071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210574706.3A CN115047071A (en) 2022-05-25 2022-05-25 Detection device and detection method for plug-in fillet weld of thick-wall pressure-bearing equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210574706.3A CN115047071A (en) 2022-05-25 2022-05-25 Detection device and detection method for plug-in fillet weld of thick-wall pressure-bearing equipment

Publications (1)

Publication Number Publication Date
CN115047071A true CN115047071A (en) 2022-09-13

Family

ID=83160376

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210574706.3A Pending CN115047071A (en) 2022-05-25 2022-05-25 Detection device and detection method for plug-in fillet weld of thick-wall pressure-bearing equipment

Country Status (1)

Country Link
CN (1) CN115047071A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115436478A (en) * 2022-09-29 2022-12-06 汕头问源科技有限公司 Welded pipe ultrasonic phased array detection method and device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115436478A (en) * 2022-09-29 2022-12-06 汕头问源科技有限公司 Welded pipe ultrasonic phased array detection method and device

Similar Documents

Publication Publication Date Title
JP4910770B2 (en) Tubular ultrasonic inspection apparatus and ultrasonic inspection method
KR101641014B1 (en) Defect detection device, defect detection method, and storage medium
CN108562647B (en) PA-TOFD combined ultrasonic detection device and method for polyethylene pipeline hot-melt butt joint
WO2020048373A1 (en) Intermediate and large diameter thin-walled tube non-destructive detection method based on phased array ultrasonic flaw detector
US20120310551A1 (en) Three-dimensional matrix phased array spot weld inspection system
CN109946387B (en) Small-diameter pipe phased array ultrasonic detection reference block and detection and verification method using same
CN106680374A (en) Phased array ultrasonic imaging detection method for large-diameter and thick-wall alloy steel weld with stainless steel surfacing layer
KR20190016086A (en) Ultrasonic Flaw Detector, Ultrasonic Flaw Detector, Manufacturing Method of Welded Steel Pipe, and Quality Control Method of Welded Steel Pipe
CN110988139A (en) Phased array ultrasonic detection method for welding buoy base plate and sampan
CN115047071A (en) Detection device and detection method for plug-in fillet weld of thick-wall pressure-bearing equipment
CN113834874B (en) Method for simulating and analyzing joint fillet weld defects based on CIVA
CN214622466U (en) Weld joint full-focusing probe device based on direct longitudinal wave and double linear arrays
CN112924557A (en) Weld joint full-focusing probe device based on direct longitudinal wave and double linear arrays and detection method
CN105717197A (en) Ultrasonic detection method for thick-walled tube girth weld surface defect diffraction time difference
CN110687205A (en) Ultrasonic longitudinal wave reflection method and diffraction time difference method combined detection method and TOFD probe applied to method
JP3165888B2 (en) Ultrasonic flaw detection method and ultrasonic flaw detection apparatus
CN1138699A (en) Supersonic testing method for butt welding seam of narrow-bore tube
CN112326798B (en) Ultrasonic detection method for crane T-shaped weld joint region defects
JP2018136252A (en) Ultrasonic inspection device, ultrasonic inspection system including the same, and ultrasonic inspection method and program
CN111189919B (en) Nuclear power station pipeline welding seam detection device
CN211086201U (en) Ultrasonic longitudinal wave reflection method and diffraction time difference method combined detection probe group
CN215985876U (en) Boiler membrane type pipe fire facing side inner wall surface longitudinal linear defect detection system
CN114563478B (en) Ultrasonic detection method for titanium alloy weld phased array for diving
CN115436478B (en) Welded pipe ultrasonic phased array detection method and device
CN211603051U (en) Phased array ultrasonic probe

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination