Large-diameter pipeline welding seam nondestructive testing device

Abstract

The utility model relates to the technical field of welding seam detection, and provides a nondestructive detection device for a welding seam of a large-diameter pipeline. The device comprises a connecting frame, a strong magnetic wheel which is arranged on the connecting frame and is magnetically attracted to the pipeline, a driving assembly which is arranged on the connecting frame and is used for driving the strong magnetic wheel to surround the outer wall of the pipeline, and an ultrasonic detection assembly which is arranged on the connecting frame and is used for detecting a welding seam. Compared with a traditional mode that a pipeline needs to be rotated to detect the welding seam, the detection device is relatively simple in welding seam detection work, relatively low in cost, relatively stable in operation under the complex conditions such as the inclined ground, and capable of improving detection continuity and consistency.

Description

Technical Field

[0001] This application relates to the technical field of weld inspection, and in particular to a non-destructive testing device for welds of large-diameter pipelines. Background Technology

[0002] Large-diameter pipeline weld inspection places high demands on the safety and reliability of industrial pipeline systems, especially in industries such as oil, gas, and chemicals, where these large-diameter pipelines are the main channels for transporting critical substances. As a crucial part of pipeline connections, the integrity of welds directly affects the safe operation and efficiency of the pipeline. Therefore, weld quality inspection is a key step in ensuring pipeline safety and preventing leaks and accidents.

[0003] With the development of technology and the improvement of safety standards, the inspection methods for large pipeline welds are also constantly improving. In order to improve the inspection capabilities, non-destructive testing technologies such as ultrasonic testing and radiographic testing have been introduced. These methods can more deeply evaluate the defects inside the weld, such as cracks, porosity and inclusions, to ensure that the quality of the weld meets safety standards.

[0004] In existing technologies, welded pipes are typically placed on a support frame, and inspection components mounted on the support frame are aligned with the weld seam. A drive mechanism on the support frame then rotates the pipe. However, due to the diameter and weight of large-diameter pipes, rotating the pipe to change the weld seam position requires a more demanding site, necessitating pipe placement and rotation, making the inspection process complex and costly. Therefore, further improvements are needed. Utility Model Content

[0005] To reduce the occurrence of the above problems, this application provides a non-destructive testing device for weld seams of large-diameter pipelines.

[0006] This application provides a non-destructive testing device for large-diameter pipe welds, which adopts the following technical solution:

[0007] A non-destructive testing device for weld seams of large-diameter pipelines includes a connecting frame, a strong magnetic wheel disposed on the connecting frame to magnetically attract the pipeline, a driving assembly disposed on the connecting frame to drive the strong magnetic wheel to surround the outer wall of the pipeline, and an ultrasonic testing assembly disposed on the connecting frame to test the weld seam.

[0008] By adopting the above technical solution, the large pipeline is first raised to a certain extent. Then, a strong magnetic wheel is directly attached to the outer wall of the pipeline. The drive component is activated to drive the connecting frame to rotate around the outer wall of the pipeline, thereby driving the ultrasonic testing component to perform a circumferential scanning test on the weld. Compared with the traditional method that requires rotating the pipeline to test the weld, this testing device is relatively simple to operate and has a relatively low cost. It can also operate relatively smoothly in complex conditions such as on inclined ground, which can improve the continuity and consistency of the test.

[0009] Preferably, there are two strong magnetic wheels, which are respectively located at both ends of the connecting frame.

[0010] By adopting the above technical solution, two strong magnetic wheels are provided and respectively set at both ends of the connecting frame to increase the magnetic strength between the magnetic wheel and the pipeline, thereby further improving the operational stability during the ring scan detection process.

[0011] Preferably, the connecting frame is provided with a support wheel between the two strong magnetic wheels.

[0012] By adopting the above technical solution and by setting up support wheels to increase the contact area between the device and the outer wall of the pipe, the detection device can be made to travel more stably.

[0013] Preferably, the ultrasonic testing assembly includes a testing instrument body mounted on a connecting frame and a probe electrically connected to the testing instrument via a wire. The probe is used to detect welds. A mounting rod extends from the side wall of the connecting frame. The length direction of the mounting rod is inclined or parallel to the forward direction of the connecting frame. The probe is located at the end of the mounting rod away from the connecting frame.

[0014] By adopting the above technical solution, since the weld seam may be uneven, if the strong magnetic wheel contacts the weld seam for circumferential scanning, the movement stability of the entire detection device is poor. To address this, by setting up a mounting rod, with the length direction of the mounting rod inclined or parallel to the forward direction of the connecting frame, and the probe set at the end of the mounting rod away from the connecting frame, the connecting frame can avoid the weld seam, making the operation of the detection device more stable and reducing the vibration of the probe during detection, thereby improving the detection effect of the detection component on the weld seam.

[0015] Preferably, a first nozzle is provided on the side of the probe away from the connecting frame, and the first nozzle is used to spray coupling agent onto the weld.

[0016] By adopting the above technical solution, and by incorporating a first nozzle, the coupling agent sprayed onto the weld seam can fill the tiny gaps between the probe and the weld surface, reducing the possibility of ultrasonic wave reflection or scattering. This allows more ultrasonic waves to propagate smoothly into the weld, improving the sensitivity and accuracy of weld seam inspection. Furthermore, the coupling agent has good lubricating properties, reducing resistance when the probe moves on the weld surface and improving the smoothness of the inspection. It also reduces wear caused by direct contact between the probe and the weld, providing a certain degree of protection.

[0017] Preferably, the probe is provided with a cleaning component on the side away from the connecting frame for cleaning impurities at the weld.

[0018] By adopting the above technical solution, since there may be some impurities adhering at the weld, which will affect the probe during detection, a cleaning component is provided to clean the probe before detection.

[0019] Preferably, the cleaning component includes a second nozzle disposed on the mounting rod, an air supply pipe connected to the second nozzle, and an air pump connected to the air supply pipe, wherein the air pump is disposed on the connecting frame.

[0020] By adopting the above technical solution, before the connecting frame surrounds the outer wall of the pipe to drive the ultrasonic testing component to perform a circumferential scanning test on the weld, the air pump can be started to draw in external gas and deliver it to the second nozzle through the gas supply pipe to blow impurities away from the weld.

[0021] Preferably, the cleaning component includes a cleaning brush disposed on the mounting rod to abut against the weld.

[0022] By adopting the above technical solution, and by setting up a cleaning brush, impurities are swept away from the weld.

[0023] In summary, this utility model has the following beneficial effects:

[0024] By directly adsorbing the strong magnetic wheel onto the outer wall of the pipe, the drive assembly is activated to drive the connecting frame to rotate around the outer wall of the pipe, thereby driving the ultrasonic testing assembly to perform a circumferential scan of the weld. Compared with the traditional method that requires rotating the pipe to inspect the weld, this testing device is relatively simple and low-cost. It can also operate relatively smoothly in complex conditions such as on inclined ground, which can improve the continuity and consistency of the inspection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;

[0026] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0027] Figure 3 This is a top view of Embodiment 1 of this application;

[0028] Figure 4 This is a schematic diagram of the structure of the driving component in Embodiment 1 of this application;

[0029] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Pipe; 2. Connecting frame; 21. Mounting rod; 22. Storage box; 23. Liquid pump; 24. Delivery pipe; 3. Strong magnetic wheel; 31. Driving wheel; 32. Driven wheel; 4. Drive assembly; 41. Servo motor; 42. Driving gear; 43. Driven gear; 5. Ultrasonic detection assembly; 51. Detector body; 52. Probe; 6. Support wheel; 7. First nozzle; 8. Cleaning component; 81. Second nozzle; 82. Air delivery pipe; 83. Air pump. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail below.

[0032] This application discloses a non-destructive testing device for weld seams in large-diameter pipelines.

[0033] Example 1:

[0034] A non-destructive testing device for large-diameter pipe welds, referring to Figure 1 , Figure 2 and Figure 3 The system includes a connecting frame 2, a strong magnetic wheel 3 disposed on the connecting frame 2 to magnetically attract the pipe 1, a driving assembly 4 disposed on the connecting frame 2 to drive the strong magnetic wheel 3 to surround the outer wall of the pipe 1, and an ultrasonic testing assembly 5 disposed on the connecting frame 2 to detect the weld. In this embodiment, the connecting frame 2 is arranged in an arc shape away from the pipe 1.

[0035] In this embodiment, the axis of the strong magnetic wheel 3 is parallel to the axis of the pipe 1. The strong magnetic wheel 3 is disposed on the surface of the connecting frame 2 near the pipe 1. Specifically, a mounting plate protrudes from the surface of the connecting frame 2 near the pipe 1, and a rotating rod is rotatably connected to the mounting plate. The rotating rod is fixedly connected to the strong magnetic wheel 3. In this embodiment, two strong magnetic wheels 3 are provided and are respectively disposed at both ends of the connecting frame 2. The two strong magnetic wheels 3 are the driving wheel 31 and the driven wheel 32.

[0036] For the drive assembly 4, in this embodiment, the drive assembly 4 may include a servo motor 41 fixedly connected to the side wall of the connecting frame 2, and the output shaft of the servo motor 41 is coaxially fixedly connected to the drive wheel 31. To maintain stability, refer to... Figure 4The servo motor 41 is mounted on the lower surface of the connecting frame 2. The drive assembly 4 also includes a drive gear 42 fixedly connected to the output shaft of the servo motor 41 and a driven gear 43 meshing with the drive gear 42. The diameter of the driven gear 43 is smaller than the diameter of the strong magnetic wheel 3. The rotating rod passes coaxially through the driven gear 43. When the servo motor 41 is started, its forward or reverse rotation drives the drive wheel 31 to rotate, thereby causing the detection device to rotate around the outer wall of the pipe 1.

[0037] Back Figure 2 Furthermore, to improve the driving stability of the detection device, a support wheel 6 is provided between the two strong magnetic wheels 3. Several support wheels 6 are provided at intervals along the length of the connecting frame 2. In this embodiment, two support wheels 6 are specifically provided.

[0038] The ultrasonic testing component 5 includes a testing instrument body 51 mounted on the connecting frame 2 and a probe 52 electrically connected to the testing instrument via a wire. The probe 52 is used to detect weld seams. In this embodiment, due to the unevenness of the weld seam, the strong magnetic wheel 3 contacts the weld seam for circumferential scanning, resulting in poor movement stability of the entire testing device. To address this, a mounting rod 21 extends from the side wall of the connecting frame 2. The length direction of the mounting rod 21 is inclined or parallel to the forward direction of the connecting frame 2. In this embodiment, the mounting rod 21 specifically includes a vertical section perpendicular to the connecting frame 2 and a parallel section perpendicular to the vertical section and parallel to the forward direction of the connecting frame 2. The probe 52 is located at the end of the parallel section away from the connecting frame 2 and is fixedly connected to the surface of the mounting rod 21 near the pipe 1.

[0039] Furthermore, to reduce wear caused by direct contact between the probe 52 and the weld, a first nozzle 7 is provided on the side of the probe 52 away from the connecting frame 2. The first nozzle 7 is used to spray coupling agent onto the weld. For the installation of the first nozzle 7, the mounting rod 21 can be extended to fix the first nozzle 7 to the lower surface of the mounting rod 21. For the supply of coupling agent, a storage box 22 for holding coupling agent is provided on the surface of the connecting frame 2 away from the pipe 1. A liquid pump 23 is fixedly connected to the storage box 22, and a delivery pipe 24 is fixedly connected between the liquid pump 23 and the first nozzle 7 to deliver coupling agent to the first nozzle 7 to fill the tiny gaps between the probe 52 and the weld surface.

[0040] It should be noted that the mounting rod 21 can be fixed to the connecting bracket 2 with bolts, or the probe 52 and the first nozzle 7 can be fixed to the mounting rod 21 with bolts, or other detachable methods not limited to bolts can be used to install the mounting rod 21, the probe 52 and the first nozzle 7, so as to facilitate the disassembly and replacement of the damaged probe 52 or the first nozzle 7.

[0041] When the welded pipe 1 is inspected by this testing device, it needs to be raised. The specific raising can be placed on the support frame in the existing technology, or the height block can be placed directly under the pipe 1. This does not require major modifications to the existing pipe 1 system, thus improving the applicability and flexibility of the technical solution.

[0042] The implementation principle of the non-destructive testing device for large-diameter pipe welds in this embodiment is as follows: First, the large pipe 1 is raised to a certain extent. Then, a strong magnetic wheel 3 is directly adsorbed onto the outer wall of the pipe 1. The servo motor 41 is started to drive the connecting frame 2 to rotate around the outer wall of the pipe 1, thereby driving the probe 52 to perform a circumferential scan of the weld. Before the probe 52 performs the circumferential scan, a coupling agent is sprayed onto the weld through the first nozzle 7. Compared with the traditional method that requires rotating the pipe 1 to inspect the weld, this testing device is relatively simple to operate, has a relatively low cost, and can operate relatively smoothly even in complex conditions such as on inclined ground, thus improving the continuity and consistency of the inspection.

[0043] Example 2:

[0044] Reference Figure 5 The difference from Embodiment 1 is that a cleaning component 8 is provided on the side of the probe 52 away from the connecting frame 2. The cleaning component 8 is used to clean impurities at the weld before spraying the coupling agent. In this embodiment, the cleaning component 8 may include a second nozzle 81, an air supply pipe 82 connected to the second nozzle 81, and an air pump 83 connected to the air supply pipe 82. The second nozzle 81 is located on the side of the first nozzle 7 away from the probe 52. For the installation of the second nozzle 81, the mounting rod 21 is further extended to install the second nozzle 81 on the surface of the mounting rod 21 near the pipe 1. The air pump 83 is fixedly connected to the surface of the connecting frame 2 away from the pipe 1. It should be noted that the jet direction of the second nozzle 81 can be tilted to the tangential direction of the outer wall of the pipe 1 to blow impurities away from the weld.

[0045] The second nozzle 81 and the air supply pipe 82 can be replaced with a single air blowing pipe, with the air blowing direction also inclined to the tangential direction of the outer wall of pipe 1. The cleaning component 8 can also be a cleaning brush mounted on the mounting rod 21 to directly abut against the weld. It should be noted that the cleaning brush can be bolted to the mounting rod 21 for easy removal and replacement, or it can be installed in other detachable ways.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A non-destructive testing device for weld seams of large-diameter pipelines, characterized in that: It includes a connecting frame (2), a strong magnetic wheel (3) disposed on the connecting frame (2) to magnetically attract the pipe (1), a driving assembly (4) disposed on the connecting frame (2) to drive the strong magnetic wheel (3) to surround the outer wall of the pipe (1), and an ultrasonic testing assembly (5) disposed on the connecting frame (2) to detect the weld.

2. The non-destructive testing device for large-diameter pipe welds according to claim 1, characterized in that: Two strong magnetic wheels (3) are provided and are respectively located at both ends of the connecting frame (2).

3. The non-destructive testing device for large-diameter pipe welds according to claim 2, characterized in that: The connecting frame (2) is provided with a support wheel (6) between the two strong magnetic wheels (3).

4. The non-destructive testing device for large-diameter pipe welds according to claim 1, characterized in that: The ultrasonic testing assembly (5) includes a testing instrument body (51) mounted on a connecting frame (2) and a probe (52) electrically connected to the testing instrument via a wire. The probe (52) is used to test welds. A mounting rod (21) extends from the side wall of the connecting frame (2). The length direction of the mounting rod (21) is inclined or parallel to the forward direction of the connecting frame (2). The probe (52) is located at the end of the mounting rod (21) away from the connecting frame (2).

5. The non-destructive testing device for large-diameter pipe welds according to claim 4, characterized in that: The probe (52) is provided with a first nozzle (7) on the side away from the connecting frame (2), and the first nozzle (7) is used to spray coupling agent onto the weld.

6. The non-destructive testing device for large-diameter pipe welds according to claim 4, characterized in that: The probe (52) is provided with a cleaning component (8) on the side away from the connecting frame (2) for cleaning impurities at the weld.

7. The non-destructive testing device for large-diameter pipe welds according to claim 6, characterized in that: The cleaning component (8) includes a second nozzle (81) disposed on the mounting rod (21), an air supply pipe (82) connected to the second nozzle (81), and an air pump (83) connected to the air supply pipe (82), wherein the air pump (83) is disposed on the connecting frame (2).

8. The non-destructive testing device for large-diameter pipe welds according to claim 6, characterized in that: The cleaning component (8) includes a cleaning brush disposed on the mounting rod (21) to abut against the weld.

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