A device for inspecting a weld of a steel pipe
Patent Information
- Application Number
- CN202522490911.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-24
AI Technical Summary
然而，此类传统装置存在技术局限：探头多固定安装在环形支架上，探测角度出厂预设，仅能单一方向检测（如水平贴合焊缝）；实际中，不同规格钢管（如薄壁、厚壁）、不同焊接工艺（如埋弧焊、氩弧焊）的焊缝缺陷分布不同，例如厚壁管焊缝根部未焊透需探头倾斜探测，固定角度探头无法适配，易漏检；且切换检测需求时，需拆卸重装探头调整角度，不仅增加操作成本，还易因人工误差影响精度，难以满足现代化生产线的高效、精准探伤要求
1、本实用新型的调角机构中，电机二驱动减速器带动齿轮二转动，配合传动环内壁的齿槽可带动传动环在环槽内转动，进而通过滑块二带动伸缩杆及探伤探头同步转动，同时伸缩杆带动滑块一在导槽内滑动，确保角度调节稳定，通过伸缩杆能够调整探伤探头垂直于管道方向上的位置；结合转动组件中电机一驱动齿轮一与齿环啮合，使齿环带动调节座及探伤探头沿安装槽转动，实现“探头多角度调节适配不同缺陷探测需求+围绕钢管圆周转动覆盖全周焊缝”的双重功能，既避免传统固定角度探头对厚壁管焊缝根部等缺陷的漏检，又无需拆卸重装探头，降低操作成本与人工误差，满足高效精准探伤要求。
Smart Images
Figure CN224840164U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flaw detection technology, and in particular to a flaw detection device for steel pipe welds. Background Technology
[0002] Steel pipes are widely used in petroleum, chemical, and municipal pipeline networks, and the quality of their welds directly affects system safety and service life. During production and installation, welds are prone to defects such as cracks and incomplete penetration due to process deviations and impurities in the base material. If these defects are not detected, they may lead to accidents such as leaks and structural failures. Therefore, weld inspection is a critical process. Among these, inspection devices based on a circular rotating support are widely used in automated inspection because they can drive the probe to move around the weld circumference and cover the entire circumference for inspection, significantly improving efficiency and coverage. However, such traditional devices have technical limitations: the probes are mostly fixedly mounted on a ring bracket, and the detection angle is preset at the factory, which can only detect in a single direction (such as horizontal welds); in practice, the distribution of weld defects is different for steel pipes of different specifications (such as thin-walled and thick-walled) and different welding processes (such as submerged arc welding and argon arc welding). For example, if the root of the weld of a thick-walled pipe is not fully penetrated, the probe needs to be tilted for detection. Fixed-angle probes cannot be adapted and are prone to missed detection; moreover, when switching detection requirements, the probe needs to be disassembled and reinstalled to adjust the angle, which not only increases the operating cost, but also makes it easy for human error to affect the accuracy, making it difficult to meet the high-efficiency and accurate flaw detection requirements of modern production lines. Utility Model Content
[0003] In view of the problems of existing traditional steel pipe weld flaw detection devices based on ring rotating brackets, such as fixed installation of probes and preset detection angles that can only detect in one direction, which cannot adapt to the weld defect detection needs of different specifications of steel pipes and welding processes, are prone to missed detection, and require disassembly and reassembly of probes when changing requirements, which increases operating costs and is prone to affecting accuracy due to human error, making it difficult to meet the requirements of efficient and accurate flaw detection in modern production lines, this utility model is proposed.
[0004] To solve the above technical problems, this utility model provides the following technical solution: a flaw detection device for steel pipe welds, including a base, a support frame symmetrically provided on the top of the base, a support wheel rotatably installed inside the support frame, a positioning component provided on the top of the support frame, an installation frame provided between the two support frames, and a flaw detection probe connected to the top of the inner side of the installation frame through an angle adjustment mechanism, the angle adjustment mechanism being connected to the installation frame through a rotation component; The angle adjustment mechanism includes an adjustment seat, an inner side of which is provided with a telescopic rod. The lower end of the telescopic rod is connected to a flaw detection probe. An annular groove is provided on one inner wall of the adjustment seat. A transmission ring is rotatably installed in the annular groove. One end of the transmission ring is connected to the telescopic rod through a slider two, and the slider two is located in the annular groove.
[0005] As a preferred embodiment, the angle adjustment mechanism further includes a second motor, which is located on the side of the adjustment seat near the transmission ring. The output end of the second motor is connected to a reducer, and the reducer is fixedly connected to the adjustment seat. A fixing groove is provided at the bottom of the ring groove, and a second gear connected to the output end of the reducer is provided in the fixing groove. Several tooth grooves that mesh with the second gear are provided on the inner wall of the transmission ring.
[0006] As a preferred embodiment, the inner wall of the adjusting seat is symmetrically provided with guide grooves, and a slider is slidably installed in the guide groove, and the slider is fixedly connected to the telescopic rod. The guide groove and the annular groove are concentric.
[0007] As a preferred embodiment, the rotating assembly includes a gear ring, the inner wall of the mounting bracket has a mounting groove, the gear ring is rotatably mounted in the mounting groove, and the inner top wall of the gear ring is fixedly connected to the adjusting seat. The outer wall of the gear ring is symmetrically provided with limiting rings, the inner wall of the mounting groove is symmetrically provided with limiting grooves that are adapted to the limiting rings, the top of the mounting bracket has a driving groove communicating with the mounting groove, the driving groove is provided with a gear that meshes with the gear ring, and a motor is provided on one side of the top of the mounting bracket, and the output end of the motor is fixedly connected to the gear.
[0008] As a preferred embodiment, the positioning component includes a hydraulic cylinder, which is fixedly installed on the top of the support frame. The telescopic end of the hydraulic cylinder is connected to a pressure plate inside the support frame, and the pressure plate is arc-shaped with a rubber layer at its bottom.
[0009] As a preferred embodiment, the top of the base is symmetrically provided with a second hydraulic cylinder, the telescopic end of the second hydraulic cylinder is fixedly connected to the mounting bracket, and the top of the base is provided with a through groove adapted to the mounting bracket.
[0010] Compared with the prior art, the present invention has at least the following beneficial effects: 1. In the angle adjustment mechanism of this utility model, motor 2 drives the reducer to rotate gear 2. The gear groove on the inner wall of the transmission ring can drive the transmission ring to rotate in the ring groove. Then, through slider 2, the telescopic rod and the flaw detection probe rotate synchronously. At the same time, the telescopic rod drives slider 1 to slide in the guide groove to ensure stable angle adjustment. The position of the flaw detection probe perpendicular to the pipeline can be adjusted by the telescopic rod. Combined with motor 1 driving gear 1 to mesh with the gear ring in the rotating assembly, the gear ring drives the adjustment seat and the flaw detection probe to rotate along the mounting groove. This achieves the dual function of "multi-angle adjustment of the probe to adapt to different defect detection needs + rotation around the circumference of the steel pipe to cover the entire circumference of the weld". This avoids the omission of defects such as the root of the weld in thick-walled pipes by traditional fixed-angle probes, and eliminates the need to disassemble and reinstall the probe, reducing operating costs and human error, and meeting the requirements of efficient and accurate flaw detection.
[0011] 2. The support wheel installed inside the support frame of this utility model can support and guide the steel pipe, making it easy to place and move the steel pipe stably; the hydraulic cylinder one in the positioning component drives the pressure plate to press down, which can fix steel pipes of different diameters and prevent the steel pipes from moving during flaw detection; at the same time, the hydraulic cylinder two can drive the mounting frame to move up and down, so that the mounting frame and the steel pipe are kept on the same axis when flaw detection of steel pipes of different diameters. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure between the gear and the gear ring of this utility model. Figure 3 This is a partial cross-sectional structural diagram of the mounting bracket of this utility model; Figure 4 This is a partial cross-sectional view of the adjustment seat of this utility model; Figure 5 This is a side sectional view of the adjusting seat of this utility model; Figure 6 This is a schematic diagram of the structure between the transmission ring and the second gear of this utility model.
[0013] Explanation of reference numerals in the attached figures: 1. Base; 2. Support frame; 3. Support wheel; 4. Mounting frame; 5. Mounting slot; 6. Drive slot; 7. Motor 1; 8. Gear 1; 9. Gear ring; 10. Limiting ring; 11. Limiting slot; 12. Flaw detector probe; 13. Adjusting seat; 14. Motor 2; 15. Reducer; 16. Ring groove; 17. Transmission ring; 18. Fixing slot; 19. Gear 2; 20. Guide groove; 21. Slider 1; 22. Slider 2; 23. Telescopic rod; 24. Hydraulic cylinder 1; 25. Pressure plate; 26. Hydraulic cylinder 2; 27. Through groove. Detailed Implementation
[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0015] Reference Figure 1 - Figure 6 As shown, a flaw detection device for steel pipe welds is provided, including a base 1, with symmetrical support frames 2 on the top of the base 1, support wheels 3 rotatably mounted inside the support frames 2, a positioning component on the top of the support frames 2, and a mounting frame 4 between the two support frames 2. A flaw detection probe 12 is connected to the top of the inner side of the mounting frame 4 through an angle adjustment mechanism, and the angle adjustment mechanism is connected to the mounting frame 4 through a rotating component. The overall structure is compact, and the components work together to provide a stable mechanical foundation for steel pipe weld flaw detection, enabling efficient automated operation of the flaw detection work. The angle adjustment mechanism includes an adjustment seat 13, with a telescopic rod 23 on the inner side of the adjustment seat 13. The lower end of the telescopic rod 23 is connected to the flaw detection probe 12. An annular groove 16 is formed on the inner wall of one side of the adjustment seat 13. A transmission ring 17 is rotatably installed in the annular groove 16. One end of the transmission ring 17 is connected to the telescopic rod 23 through a slider 22, and the slider 22 is located in the annular groove 16. This structural design enables the rotation of the transmission ring 17 to be stably transmitted to the telescopic rod 23 and the flaw detection probe 12, providing a reliable mechanical transmission path for probe angle adjustment and ensuring that the angle adjustment process is smooth and controllable.
[0016] In this example, the angle adjustment mechanism also includes a second motor 14, which is located on the side of the adjustment seat 13 near the transmission ring 17. The output end of the second motor 14 is connected to a reducer 15, and the reducer 15 is fixedly connected to the adjustment seat 13. A fixed groove 18 is provided at the bottom of the ring groove 16, and a gear 19 connected to the output end of the reducer 15 is provided in the fixed groove 18. Several tooth grooves that mesh with the gear 19 are provided on the inner wall of the transmission ring 17. Power is provided by the second motor 14, and after the reducer 15 reduces the speed and increases the torque, the meshing transmission between the gear 19 and the tooth grooves on the inner wall of the transmission ring 17 can precisely control the rotation angle of the transmission ring 17, realize the precise adjustment of the angle of the flaw detection probe 12, and meet the precise angle requirements of different defect detection.
[0017] In this example, the inner wall of the adjusting seat 13 is symmetrically provided with guide grooves 20, and a slider 21 is slidably installed in the guide groove 20. The slider 21 is fixedly connected to the telescopic rod 23. The guide groove 20 and the annular groove 16 are concentric. The design of the guide groove 20 and the annular groove 16 being concentric, together with the sliding of the slider 21 in the guide groove 20, can guide and limit the rotation of the telescopic rod 23, effectively preventing the telescopic rod 23 from deviating during the angle adjustment process, and further improving the stability and accuracy of the angle adjustment of the flaw detection probe 12.
[0018] In this example, the rotating assembly includes a gear ring 9. The inner wall of the mounting frame 4 has a mounting groove 5, in which the gear ring 9 is rotatably mounted. The top inner wall of the gear ring 9 is fixedly connected to the adjusting seat 13. The outer wall of the gear ring 9 is symmetrically provided with limiting rings 10. The inner wall of the mounting groove 5 is symmetrically provided with limiting grooves 11 that fit the limiting rings 10. The top of the mounting frame 4 has a drive groove 6 communicating with the mounting groove 5. A gear 8 meshes with the gear ring 9 within the drive groove 6. A motor 7 is located on one side of the top of the mounting frame 4, and the output end of the motor 7 is fixedly connected to the gear 8. The motor 7 drives the gear 8 to mesh with the gear ring 9, causing the adjusting seat 13 and the flaw detection probe 12 to rotate around the steel pipe. The cooperation between the limiting ring 10 and the limiting groove 11 ensures the smooth rotation of the gear ring 9, achieving full circumferential coverage inspection of the steel pipe weld by the flaw detection probe 12, eliminating the need for multiple adjustments to the steel pipe position and improving inspection efficiency.
[0019] In this example, the positioning component includes a hydraulic cylinder 24, which is fixedly installed on the top of the support frame 2. The telescopic end of the hydraulic cylinder 24 is connected to a pressure plate 25 inside the support frame 2. The pressure plate 25 is arc-shaped and has a rubber layer at its bottom. The hydraulic cylinder 24 drives the arc-shaped pressure plate 25 to press down, which can adapt to steel pipes of different diameters and fit tightly against their outer walls. The rubber layer can avoid damage to the surface of the steel pipe and effectively fix the steel pipe, preventing displacement of the steel pipe during the flaw detection process and ensuring the accuracy of the flaw detection.
[0020] In this example, hydraulic cylinders 26 are symmetrically arranged on the top of the base 1. The telescopic end of the hydraulic cylinders 26 is fixedly connected to the mounting frame 4. The top of the base 1 is provided with a through groove 27 that is compatible with the mounting frame 4. The hydraulic cylinders 26 can drive the mounting frame 4 to move along the through groove 27, which makes it easy to adjust the position of the mounting frame 4 according to steel pipes of different diameters, ensuring that the mounting frame 4 and the steel pipe remain coaxial, so that the flaw detection probe 12 can be accurately aligned with the weld area, thereby improving the adaptability of the device to steel pipes of different specifications.
[0021] During use, the steel pipe to be inspected is placed on the support frame 2 of the base 1, and the support wheel 3 supports the steel pipe and makes it easy to push, so that the weld seam is moved to the inspection position; Start hydraulic cylinder 24 to push the arc-shaped pressure plate 25 down, and fix the steel pipe to prevent it from moving by attaching it to the outer wall of the steel pipe through the rubber layer. Based on the diameter of the steel pipe, start hydraulic cylinder 26 to drive the mounting frame 4 to move up and down along the through groove 27, so that the angle adjustment mechanism inside the mounting frame 4 is coaxial with the steel pipe, ensuring that the probe is aligned with the weld. Adjust the telescopic rod 23 to move the flaw detection probe 12 closer to or further away from the steel pipe to find the optimal detection distance; When the probe angle needs to be adjusted, start motor 14, which drives gear 19 to rotate via reducer 15. The meshing transmission ring 17 rotates in the ring groove 16, which drives telescopic rod 23 to rotate via slider 22. Slider 21 slides along guide groove 20 to assist in guidance, thereby achieving probe angle adjustment such as 45°. Start motor 7, which drives gear 8 to rotate. The meshing gear ring 9 rotates in the mounting groove 5, and the limiting ring 10 slides along the limiting groove 11 to prevent deviation. The gear ring 9 drives the adjusting seat 13 and the flaw detection probe 12 to rotate around the steel pipe, completing the 360° full circumference inspection of the weld.
[0022] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A device for inspecting weld seams in steel pipes, comprising a base (1), characterized in that: The base (1) is symmetrically provided with support frames (2) on the top. Support wheels (3) are rotatably installed inside the support frames (2). A positioning component is provided on the top of the support frames (2). An installation frame (4) is provided between the two support frames (2). A flaw detection probe (12) is connected to the top of the inner side of the installation frame (4) through an angle adjustment mechanism. The angle adjustment mechanism is connected to the installation frame (4) through a rotating component. The angle adjustment mechanism includes an adjustment seat (13), and a telescopic rod (23) is provided on the inner side of the adjustment seat (13). The lower end of the telescopic rod (23) is connected to the flaw detection probe (12). An annular groove (16) is provided on the inner wall of one side of the adjustment seat (13). A transmission ring (17) is rotatably installed in the annular groove (16). One end of the transmission ring (17) is connected to the telescopic rod (23) through a slider (22), and the slider (22) is located in the annular groove (16).
2. The device for inspecting weld seams of steel pipes according to claim 1, characterized in that: The angle adjustment mechanism also includes a second motor (14), which is located on the side of the adjustment seat (13) near the transmission ring (17). The output end of the second motor (14) is connected to a reducer (15), and the reducer (15) is fixedly connected to the adjustment seat (13). A fixed groove (18) is provided at the bottom of the ring groove (16), and a gear (19) connected to the output end of the reducer (15) is provided in the fixed groove (18). A number of tooth grooves that mesh with the gear (19) are provided on the inner wall of the transmission ring (17).
3. The device for inspecting weld seams of steel pipes according to claim 2, characterized in that: The inner wall of the adjusting seat (13) is symmetrically provided with guide grooves (20), and a slider (21) is slidably installed in the guide groove (20). The slider (21) is fixedly connected to the telescopic rod (23). The guide groove (20) and the annular groove (16) are concentric.
4. The device for inspecting weld seams of steel pipes according to claim 2, characterized in that: The rotating assembly includes a gear ring (9), and the inner wall of the mounting frame (4) is provided with a mounting groove (5). The gear ring (9) is rotatably installed in the mounting groove (5), and the inner top wall of the gear ring (9) is fixedly connected to the adjusting seat (13). The outer wall of the gear ring (9) is symmetrically provided with a limiting ring (10). The inner wall of the mounting groove (5) is symmetrically provided with a limiting groove (11) that matches the limiting ring (10). The top of the mounting frame (4) is provided with a driving groove (6) that communicates with the mounting groove (5). The driving groove (6) is provided with a gear (8) that meshes with the gear ring (9). The top side of the mounting frame (4) is provided with a motor (7), and the output end of the motor (7) is fixedly connected to the gear (8).
5. The device for inspecting weld seams of steel pipes according to claim 2, characterized in that: The positioning component includes a hydraulic cylinder (24), which is fixedly installed on the top of the support frame (2). The telescopic end of the hydraulic cylinder (24) is connected to a pressure plate (25) inside the support frame (2). The pressure plate (25) is arc-shaped and has a rubber layer at the bottom.
6. The device for inspecting weld seams of steel pipes according to claim 5, characterized in that: The base (1) is symmetrically provided with hydraulic cylinders two (26) on the top. The telescopic end of the hydraulic cylinders two (26) is fixedly connected to the mounting frame (4). The base (1) is provided with a through groove (27) adapted to the mounting frame (4) on the top.