A device and method for detecting pipe socket weld defects

Abstract

The application discloses a kind of pipe base fillet weld defect detection device and method, the device includes: track part, connecting part and detection part, track part is set to be welded on the second pipeline of first pipeline, installation frame can be circumferentially moved on it is equipped on track part, installation frame is installed connecting part according to preset angle on the other end away from track part, connecting part includes main plate, and connecting block is equipped on main plate and can be moved along the axial direction of main plate, installation frame is rotationally connected with connecting block, detection part is set to main plate and makes detection part with the fillet weld between first pipeline and second pipeline main pipe and branch pipe alignment.Detection part circumferentially scans weld, avoids the detection personnel hand-held detection component to occur during the process of scanning weld around, so that detection component deviates from weld track and produces lift change, also will not make detection department signal anomaly and defect miss detection.The device detection speed is fast, efficiency is high and stability is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of detection equipment, and particularly relates to a pipe seat fillet weld defect detection device and method. BACKGROUND

[0002] Alternating Current Field Measurement (ACFM) is a new electromagnetic nondestructive testing technology. An excitation magnetic field is generated by an excitation module in a probe, and a uniform alternating current is induced in a workpiece. When a defect exists in the workpiece, the induced current will cause disturbance around the defect, and in turn cause distortion of the space magnetic field. A sensor in the detection probe detects the change of the space magnetic field signal, so as to realize the judgment and analysis of the defect. This technology has the advantages of not needing to remove the coating, being insensitive to lift-off, being able to realize in-service detection of equipment and products, and the like. Compared with conventional penetration, magnetic powder and eddy current detection technologies, ACFM has outstanding advantages in pipe seat fillet weld detection.

[0003] For the existing pipe-pipe connection pipe seat fillet weld, the weld trace is a space curve which is not in one plane. For the alternating current electromagnetic field detection of the intersecting line weld, the detection personnel need to hold the probe and scan around the weld. In the scanning process, the probe is easy to deviate from the weld trace and cause lift-off change, thereby causing magnetic field signal fluctuation and defect missed detection, and the like. Moreover, there are problems of slow detection speed, low efficiency, poor repeatability of the detection results, and the like. SUMMARY

[0004] In view of the above problems, the present application provides a pipe seat fillet weld defect detection device, which comprises a track portion, a connecting portion and a detection portion. The track portion is sleeved on a second pipeline which is welded on a first pipeline. An installation frame capable of moving in a circumferential direction is arranged on the track portion. The connecting portion is arranged on the other end of the installation frame away from the track portion according to a preset angle. The connecting portion comprises a main plate and a connecting block arranged on the main plate and capable of moving along the axial direction of the main plate. The installation frame is rotationally connected with the connecting block. The detection portion is arranged on the main plate and is aligned with the fillet weld between the first pipeline and the second pipeline.

[0005] Optionally, the connecting portion further comprises an elastic connecting piece. Two ends of the elastic connecting piece are respectively connected with the end face of the main plate and the end face of the connecting block. The length direction of the elastic connecting piece is consistent with the axial direction of the main plate.

[0006] Optionally, at least one first mounting position is provided on the end of the connecting block, and at least one second mounting position is provided on the main body plate. The first mounting position and the second mounting position are on the same axis, and the two ends of the elastic connector are respectively connected to the first mounting position and the second mounting position.

[0007] Optionally, a connection hole is provided on the side of the connecting block, and a fastener passes through the mounting bracket and the connection hole to connect with the connecting block.

[0008] Optionally, the connecting block has a semi-circular structure.

[0009] Optionally, a mounting hole is provided at the end of the main body plate, and the detection part is installed in the mounting hole.

[0010] Optionally, the elastic connector includes a first connector, an elastic element, and a second connector connected in sequence, wherein the first connector is connected to the second mounting position, and the second connector is connected to the first mounting position.

[0011] Optionally, the mounting bracket includes a collar and a support connected together. The collar is disposed on the track and can move circumferentially on the track. The connecting block is fixed to the end of the support at a preset angle.

[0012] Optionally, the track includes an annular track, a drive seat, and a drive component. The track is sleeved on the second pipe, the mounting bracket engages with the track, the drive seat is disposed at the connection between the track and the mounting bracket, and the drive component is mounted on the drive seat and connected to the mounting bracket.

[0013] Optionally, the detection unit includes a detachable cover plate, a housing, a filter amplification module, an excitation core, and a sensor. The detachable cover plate is mounted on the housing. The filter amplification module, the excitation core, and the sensor are sequentially arranged in a slot in the housing. The housing is mounted on the main body plate. The sensor detects the alternating electromagnetic field excited by the excitation core in the weld. The sensor is connected to the filter amplification module and is located near the fillet weld.

[0014] The present invention also provides a method for detecting defects in fillet welds of pipe seats, comprising:

[0015] The mounting bracket connected to the track section is driven so that the mounting bracket, the connecting part and the detection part move circumferentially around the track section on the two pipes;

[0016] The mounting bracket is rotatably connected to the connecting block, and the connecting block can move along the axial direction of the main body plate so that the detection part on the main body plate can adjust the position of the relative angle weld seam.

[0017] The pipe seat fillet weld defect detection device of the present invention, by setting one end of the mounting frame on the track and enabling it to move circumferentially on the track, allows the connecting block in the connecting part connected to the other end of the mounting frame to also move circumferentially with the mounting frame. Since the connecting block is set on the main plate and can move along the axial direction of the main plate, and the main plate is equipped with the detection part, not only is the height of the detection part adjustable, but the detection part can also move circumferentially along the fillet weld. Moreover, the mounting frame and the connecting block are rotatably connected, so the angle of the detection part relative to the fillet weld can be adjusted. The detection part scans along the circumference of the fillet weld with the second pipe as the axis, thereby avoiding the shaking caused by the inspection personnel holding the detection part and scanning around the weld, which would cause the detection part to deviate from the weld trajectory and cause lifting changes, thus avoiding problems such as abnormal detection signals and missed defects. In addition, the device has a fast detection speed, high efficiency, stable detection process, and good repeatability of detection results.

[0018] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a pipe seat fillet weld defect detection device according to an embodiment of the present invention is shown;

[0021] Figure 2 A schematic diagram of the connection part of the pipe seat fillet weld defect detection device in an embodiment of the present invention is shown;

[0022] Figure 3 A schematic diagram of the connecting block of the pipe seat fillet weld defect detection device in an embodiment of the present invention is shown;

[0023] Figure 4 A schematic diagram of the track section of the pipe seat fillet weld defect detection device in an embodiment of the present invention is shown;

[0024] Figure 5 A schematic diagram of the elastic connector of the pipe seat fillet weld defect detection device in an embodiment of the present invention is shown;

[0025] Figure 6 A schematic diagram of the detection section of the pipe seat fillet weld defect detection device in an embodiment of the present invention is shown;

[0026] Figure 7 A schematic flowchart of the pipe seat fillet weld defect detection method in an embodiment of the present invention is shown.

[0027] In the diagram, 1. Track section; 11. Track; 12. Drive seat; 13. Drive component; 2. Connecting section; 21. Main body plate; 211. Second mounting position; 212. Mounting hole; 22. Connecting block; 221. First mounting position; 222. Connecting hole; 23. Elastic connector; 231. First connector; 232. Elastic element; 234. Second connector; 3. Detection section; 31. Removable cover plate; 32. Main module; 33. Filtering and amplification module; 34. Excitation core; 35. Sensor; 322. Housing; 321. Terminal cover; 4. First pipe; 5. Second pipe; 6. Mounting bracket; 61. Collar; 62. Bracket. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Regarding the problems that have arisen with existing technologies, such as Figure 1As shown, this invention provides a pipe seat fillet weld defect detection device, which realizes automatic detection of weld defects, improves detection efficiency and accuracy of detection data, and reduces interference from human factors during the detection process. The device specifically includes: a track section 1, a connecting section 2, and a detection section 3. The track section 1 is fitted onto a second pipe 5 welded to a first pipe 4. A mounting frame 6 capable of circumferential movement is provided on the track section 1. The connecting section 2 is installed at a preset angle on the other end of the mounting frame 6 away from the track section 1. The connecting section 2 includes a main plate 21 and a connecting block 22 disposed on the main plate 21 and capable of moving along the axial direction of the main plate 21. The mounting frame 6 is rotatably connected to the connecting block 22. The detection section 3 is disposed on the main plate 21 and aligned with the fillet weld between the first pipe 4 and the second pipe 5. The mounting frame 6 can move circumferentially on the track section 1, and the connecting block 22 in the connecting section 2 at the other end of the mounting frame 6 can also move circumferentially with the mounting frame 6. Since the connecting block 22 is located on the main plate 21 and can move along the axial direction of the main plate 21, and the main plate 21 is equipped with the detection section 3, not only can the height of the detection section 3 be adjusted, but the detection section 3 can also move circumferentially along the weld. The mounting frame 6 and the connecting block 22 are rotatably connected, so the angle between the detection section 3 and the fillet weld can be adjusted, so that the detection section 3 is aligned with the fillet weld to be inspected and the distance between it and the weld can be controlled. This avoids the vibration caused by manual scanning, which causes the detection section 3 to deviate from the weld trajectory and cause lifting changes, resulting in problems such as detection signal fluctuations and missed defects. In addition, this device has a fast detection speed, high efficiency, and good repeatability of detection results. It should be noted that the fillet weld between the first pipe 4 and the second pipe 5 is an intersecting line, and the relative angle between the first pipe 4 and the second pipe 5 is 90°. The mounting bracket 6 can be moved on the track 1 manually or by machine. Of course, the position of the connecting block 22 on the main body plate 21 and the installation angle between the mounting bracket 6 and the connecting block 22 can also be adjusted manually.

[0030] like Figure 2 As shown, in one embodiment, the connecting part 2 further includes an elastic connector 23. The two ends of the elastic connector 23 are connected to the end face of the main body plate 21 and the end face of the connecting block 22, respectively. The length direction of the elastic connector 23 is consistent with the axial direction of the main body plate 21. The elastic connector 23 can restrict the position of the connecting block 22 on the main body plate 21. That is, in actual use, when it is necessary to adjust the position of the detection part 3 further away from the fillet weld, the connecting block 22 needs to compress the elastic connector 23; when it is necessary to adjust the position of the detection part 3 closer to the weld, the connecting block 22 needs to stretch the elastic connector 23.

[0031] In one embodiment, at least one first mounting position 221 is provided on the end of the connecting block 22, and at least one second mounting position 211 is provided on the main body plate 21. The first mounting position 221 and the second mounting position 211 are on the same axis, and the two ends of the elastic connector 23 are respectively connected to the first mounting position 221 and the second mounting position 211. Optionally, the first mounting position 221 can be two mounting points, which are respectively provided on two relatively parallel ends of the connecting block 22. Similarly, the second mounting position 211 can also be two mounting points, which are respectively provided on two relatively parallel sides of the main body plate 21, and are located on the top of the main body plate 21 and away from the detection part 3 mounted on the main body plate 21. Optionally, there can also be two elastic connectors 23, so as to connect to the two first mounting positions 221 and the two second mounting positions 211 respectively.

[0032] like Figure 3 As shown, in one embodiment, a connecting hole 222 is provided on the side of the connecting block 22. A fastener passes through the mounting bracket 6 and the connecting hole 222 to connect with the connecting block 22. Optionally, there are two connecting holes 222, respectively provided on two pairs of sides of the connecting block 22. The fastener can be a screw or a stud. Of course, the mounting bracket 6 is also provided with corresponding through holes. The fastener can pass through the through holes and the connecting hole 222 in sequence and abut against the side of the main body plate 21 or be threadedly connected to multiple screw holes at different height positions on the main body plate 21.

[0033] In one embodiment, the connecting block 22 is a semi-circular structure. Specifically, the semi-circular structure can be a semi-circular ring structure or a semi-rectangular structure. It should be noted that the semi-circular structure has an opening in the ring structure. Of course, the semi-circular structure can also be replaced by a complete ring structure. In addition, the semi-circular structure can save materials.

[0034] like Figure 2 As shown, in one embodiment, a mounting hole 212 is provided on the end of the main body plate 21, and the detection part 3 is installed in the mounting hole 212. It should be noted that the mounting hole 212 is on the end of the main body plate 21 and is away from the second mounting position 211 of the main body plate 21 connected to the elastic connector 23. The detection part 3 can be fixed through the mounting hole 212, which can be a detachable fixed connection. For example, it can be fixed by bolts and nuts, or even by clips and slots. Specifically, clips can be provided on the mounting hole 212 and slots can be provided on the detection part 3.

[0035] like Figure 5As shown, in one embodiment, the elastic connector 23 includes a first connector 231, an elastic element 232, and a second connector 234 connected in sequence. The first connector 231 is connected to the second mounting position 211, and the second connector 234 is connected to the first mounting position 221. Optionally, the elastic element 232 can be a spring. The first connector 231 and the second connector 234 have the same structure, and each of the first connector 231 and the second connector 234 has a hole at its end. Each hole is aligned with a hole on the first mounting position 221 and the second mounting position 211, and they are fixedly connected by screws or screw holes.

[0036] like Figure 4 As shown, in one embodiment, the mounting bracket 6 includes a collar 61 and a support 62 connected together. The collar 61 is disposed on the track portion 1 and can move circumferentially on the track portion 1. The connecting block 22 is installed at a preset angle on the end of the support 62. Optionally, the support 62 has two parallel connecting rods to form a fixed space. The side wall of the connecting block 22 is attached to the inside of the fixed space, that is, to the inner side wall of the two connecting rods. The holes on the connecting rods are aligned with the connecting holes 222 on the side of the connecting block 22, and a fastener passes through the holes and the connecting holes 222. The collar 61 is sleeved on the second pipe 5. The collar 61 moves circumferentially on the track portion 1 by driving the support 62.

[0037] In one embodiment, the track section 1 includes an annular track 11, a drive seat 12, and a drive member 13. The track 11 is fitted onto the second pipe 5, and the mounting bracket 6 engages with the track 11. This part of the mounting bracket 6 engaging with the track 11 is also a gear structure. The drive seat 12 is located at the connection between the track 11 and the mounting bracket 6, and the drive member 13 is mounted on the drive seat 12 and connected to the mounting bracket 6. Optionally, the annular track 11 can be a gear track 11. Alternatively, the annular track 11 can be a slide rail track 11. In this case, the portion of the mounting bracket 6 on the slide rail track 11 also has a similar slider structure, allowing movement on the track 11 via the drive of the mounting bracket 6. The drive member 13 is a drive motor that electrically drives the mounting bracket 6 to perform circumferential movement on the annular track 11.

[0038] like Figure 6As shown, in one embodiment, the detection unit 3 includes a detachable cover plate 31, a main body module 32, a filter amplification module 33, an excitation core 34, and a sensor 35. The detachable cover plate 31 is mounted on the main body module 32. The filter amplification module 33, the excitation core 34, and the sensor 35 are arranged sequentially in a groove in the outer shell 32. The main body module 32 is mounted on the main body plate 21. The sensor 35 detects the alternating electromagnetic field excited by the excitation core 34 in the weld. If a change occurs, a problem occurs in the weld; otherwise, there is no problem. The sensor 35 is connected to the filter amplification module 33 and is located near the fillet weld. Optionally, the excitation core 34 is made of stacked U-shaped silicon steel sheets, separated by insulating material. The excitation coil is wound around the silicon steel sheets. By applying a sinusoidal excitation signal, a uniform induced current is generated in the weld under inspection. The sensor 35 is installed below the excitation core 34 in a mounting groove under the removable cover plate 31. The sensor 35 can collect the magnetic field signal Bz (one of the three-dimensional magnetic field components, specifically representing the magnetic field strength in the z-axis direction in a certain coordinate system (usually a rectangular coordinate system)) perpendicular to the fillet weld surface and the magnetic field signal Bx (one of the three-dimensional magnetic field components, specifically representing the magnetic field strength in the x-axis direction in a certain coordinate system (usually a rectangular coordinate system)) tangential to the fillet weld surface. The sensor 35 is connected to the filter amplification module 33, and then connected to the computer through phase-locked amplification and a data acquisition card. In addition, the main module 32 includes a probe housing 322 and a terminal cover 321. The probe and the detection instrument are connected through the terminal cover 321.

[0039] like Figure 7 As shown, the present invention also provides a method for detecting defects in fillet welds of pipe seats, the method comprising:

[0040] Step S10: Drive the mounting bracket 6 connected to the track section 1 so that the mounting bracket 6, the connecting part 2 and the detection part 3 move circumferentially around the track section 1 on the second pipe 5;

[0041] In step S20, the mounting bracket 6 is rotatably connected to the connecting block 22, and the connecting block 22 can move along the axial direction of the main body plate 21, so that the position of the detection part 3 on the main body plate 21 is adjusted relative to the corner weld. By driving the mounting bracket 6, the mounting bracket 6 can drive the connecting block 22 and the main body plate 21 to move circumferentially around the second pipe 5, thereby realizing the circumferential detection of the corner weld by the detection part 3 on the main body plate 21.

[0042] This device and method are designed for AC electromagnetic field detection of fillet welds on pipe fittings. It eliminates the need for personnel to manually scan the weld with a probe. During the detection process, there is no vibration that could cause the detection unit 3 to deviate from the weld trajectory or experience lift-off changes, thus reducing magnetic field signal fluctuations and preventing missed defects. Furthermore, the detection speed is fast, efficient, and the results are highly repeatable. In addition, the main module 32 is housed within the mounting hole 212 on the main plate 21. By adjusting the position of the connecting block 22 on the main plate 21 and the relative angle between the mounting bracket 6 and the connecting block 22, the main module 32 can achieve close contact between the detection unit 3 and the surface of the weld being inspected, and maintain perpendicularity to the weld surface. This avoids the impact of probe deviation from the weld and changes in probe lift-off distance on the detection results during manual scanning.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for detecting defects in fillet welds of pipe fittings, characterized in that, include: The system comprises a track section (1), a connecting section (2), and a detection section (3). The track section (1) is fitted onto a second pipe (5) welded onto a first pipe (4). A mounting bracket (6) capable of circumferential movement is provided on the track section (1). The connecting section (2) is mounted at a preset angle on the other end of the mounting bracket (6) away from the track section (1). The connecting section (2) includes a main plate (21) and a connecting block (22) provided on the main plate (21) and capable of moving along the axial direction of the main plate (21). The mounting bracket (6) is rotatably connected to the connecting block (22). The detection section (3) is provided on the main plate (21) and is aligned with the corner weld between the first pipe (4) and the second pipe (5).

2. The pipe seat fillet weld defect detection device according to claim 1, characterized in that, The connecting part (2) further includes an elastic connector (23), the two ends of which are connected to the end face of the main body plate (21) and the end face of the connecting block (22) respectively. The length direction of the elastic connector (23) is consistent with the axial direction of the main body plate (21).

3. The pipe seat fillet weld defect detection device according to claim 2, characterized in that, At least one first mounting position (221) is provided on the end of the connecting block (22), and at least one second mounting position (211) is provided on the main body plate (21). The first mounting position (221) and the second mounting position (211) are on the same axis, and the two ends of the elastic connector (23) are respectively connected to the first mounting position (221) and the second mounting position (211).

4. The pipe seat fillet weld defect detection device according to claim 3, characterized in that, A connection hole (222) is provided on the side of the connecting block (22), and a fastener passes through the mounting bracket (6) and the connection hole (222) to connect with the connecting block (22).

5. The pipe seat fillet weld defect detection device according to any one of claims 1-4, characterized in that, The connecting block (22) has a semi-circular structure.

6. The pipe seat fillet weld defect detection device according to claim 1, characterized in that, A mounting hole (212) is provided at the end of the main body plate (21), and the detection part (3) is installed in the mounting hole (212).

7. The pipe seat fillet weld defect detection device according to claim 3, characterized in that, The elastic connector (23) includes a first connector (231), an elastic element (232), and a second connector (234) connected in sequence. The first connector (231) is connected to the second mounting position (211), and the second connector (234) is connected to the first mounting position (221).

8. The pipe seat fillet weld defect detection device according to claim 1, characterized in that, The mounting bracket (6) includes a collar (61) and a bracket (62) connected to each other. The collar (61) is disposed on the track (1) and can move circumferentially on the track (1). The connecting block (22) is fixed to the end of the bracket (62) at a preset angle.

9. The pipe seat fillet weld defect detection device according to claim 1, characterized in that, The track section (1) includes an annular track (11), a drive seat (12), and a drive member (13). The track (11) is sleeved on the second pipe (5). The mounting bracket (6) engages with the track (11). The drive seat (12) is located at the connection between the track (11) and the mounting bracket (6). The drive member (13) is mounted on the drive seat (12) and connected to the mounting bracket (6).

10. The pipe seat fillet weld defect detection device according to claim 1, characterized in that, The detection unit (3) includes a detachable cover plate (31), a housing (32), a filter amplification module (33), an excitation core (34), and a sensor (35). The detachable cover plate (31) is installed on the housing (32). The filter amplification module (33), the excitation core (34), and the sensor (35) are arranged sequentially in a slot in the housing (32). The housing (32) is installed on the main body plate (21). The sensor (35) detects the alternating electromagnetic field excited by the excitation core (34) in the weld. The sensor (35) is connected to the filter amplification module (33) and is located near the corner weld.

11. A method for detecting defects in fillet welds of pipe seats, characterized in that, The pipe seat fillet weld defect detection device according to any one of claims 1-10 includes the following steps: The mounting bracket connected to the track section is driven to make the mounting bracket, the connecting part, and the detection part move circumferentially around the track section on the second pipe; The mounting bracket is rotatably connected to the connecting block, and the connecting block can move along the axial direction of the main body plate so that the detection part on the main body plate can adjust the position of the relative angle weld seam.

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