Magnetic powder device for pipeline welding seam detection

Abstract

The utility model relates to the technical field of electromagnetic induction principles, and discloses a magnetic powder device for pipeline welding seam detection, which comprises an electromagnetic yoke, the outer wall of the electromagnetic yoke is fixedly connected with a connecting column, and an adjusting assembly is arranged in the connecting column; the adjusting assembly comprises a first rack, a first gear and a second rack, the first rack is arranged in the connecting column, one end of the first rack is fixedly connected with a first magnetic pole arm, the outer wall of the first rack is in meshed connection with the first gear, a rotating shaft is fixedly connected into the first gear, and the outer wall of the rotating shaft is fixedly connected with a second gear. One end of the second rack is fixedly connected with a second magnetic pole arm. According to the utility model, the rotating shaft is rotated to enable the gear I and the gear II in the rotating shaft to rotate and drive the rack I and the rack II which are meshed with the rotating shaft to horizontally move, so that the two magnetic pole shoes are driven to horizontally move, thereby adapting to pipelines with different diameters or welding seam areas with different widths and ensuring that a magnetic field covers the welding seam areas.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic induction principle technology, and in particular to a magnetic powder device for inspecting pipeline welds. Background Technology

[0002] With the widespread application of pipeline transportation in industries such as petroleum, chemical, and natural gas, the quality and safety of pipeline welds have become a crucial factor in ensuring operational reliability. Magnetic particle testing, as a commonly used non-destructive testing technique, has advantages such as high detection sensitivity and convenient operation, and is widely used for detecting surface and near-surface defects in welds. To make magnetic particle testing more efficient and stable, it is usually used in conjunction with a dedicated magnetic particle testing device to achieve uniform magnetization and magnetic particle application in the weld area, thereby clearly revealing the location of potential defects.

[0003] Common magnetic particle inspection devices typically include a magnetic yoke, power supply, probe, and magnetic particle spraying mechanism. The magnetic yoke usually consists of two fixed magnetic poles, which generate a magnetic field through DC or AC power. When the two poles of the yoke contact the surfaces of the pipe weld, a localized magnetic field is formed in the weld area. Magnetic particle is then applied, and due to magnetic leakage at the defect location, the particle accumulates, resulting in a visible inspection result. This type of structure is effective for inspecting standard workpieces and can meet certain pipeline inspection needs.

[0004] However, in existing magnetic particle devices, the two poles of the magnetic yoke are fixed and the spacing is not adjustable. When facing pipes of different diameters or weld areas of different widths, the detection accuracy is often affected by poor contact or uneven magnetic field distribution, which limits its applicable range and makes it difficult to meet the detection needs of multi-specification pipeline systems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a magnetic powder device for pipeline weld inspection, which aims to improve the problem that the existing magnetic yoke has a fixed structure between the two poles, which cannot adapt to pipelines of different diameters or weld areas of different widths, resulting in poor contact or uneven magnetic field distribution, thus affecting the detection accuracy.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a magnetic powder device for inspecting pipe welds, comprising an electromagnetic yoke, wherein a connecting column is fixedly connected to the outer wall of the electromagnetic yoke, and an adjustment component is provided inside the connecting column;

[0007] The adjustment assembly includes rack one, gear one and rack two. Rack one is disposed inside the connecting column. A magnetic pole arm one is fixedly connected to one end of rack one. Rack one and rack two are respectively meshed and connected to the two sides of the outer wall of gear one. A rotating shaft is fixedly connected inside gear one. Gear two is fixedly connected to the outer wall of the rotating shaft. A magnetic pole arm two is fixedly connected to one end of rack two.

[0008] Furthermore, a magnetic powder suspension tank is fixedly connected to the outer wall of the electromagnetic yoke. A connecting pipe is installed inside the electromagnetic yoke, and a spring is installed inside the connecting pipe. Fixed plates are fixedly connected to both ends of the spring. A first fixed ball is installed on the outer wall of the fixed plate, and a second fixed ball is installed at the other end of the connecting pipe. A pressing tube is fixedly connected to one end of the connecting pipe. The magnetic powder suspension tank is fixedly connected to the other end of the pressing tube. A water pipe is fixedly connected to the other end of the connecting pipe. A squeezing head is fixedly connected to the outer wall of the water pipe, and a spray nozzle is fixedly connected to the other end of the water pipe.

[0009] Furthermore, the outer wall of the electromagnetic yoke is electrically connected to a wire, the wire is electrically connected to a plug, and a power supply box is fixedly connected to the outer wall of the plug.

[0010] Furthermore, a magnetic pole shoe is fixedly connected to the lower surface of the magnetic pole arm, and a roller is fixedly connected inside the magnetic pole shoe.

[0011] Furthermore, one end of the connecting post is fixedly connected to the outer wall of the first magnetic pole arm, and the other end of the connecting post is fixedly connected to the outer wall of the second magnetic pole arm.

[0012] Furthermore, the outer wall of the pressing tube is disposed inside the electromagnetic yoke, and the upper surface of the nozzle is fixedly connected to the lower surface of the electromagnetic yoke.

[0013] Furthermore, the outer wall of the fixed ball is disposed inside the connecting pipe, and the outer wall of the extrusion head is disposed inside the electromagnetic yoke.

[0014] Furthermore, the outer wall of the power supply box is located on one side of the outer wall of the electromagnetic yoke, and the outer wall of the rotating shaft is located inside the connecting column.

[0015] This utility model has the following beneficial effects:

[0016] In this invention, rotating the shaft causes gear one and gear two inside to rotate, which in turn drives two meshing racks one and two to move horizontally. Magnetic pole arm one and magnetic pole arm two are fixed to rack one and rack two respectively, and magnetic pole shoes are fixed below rack one and rack two, thereby driving the two magnetic pole shoes to move horizontally, thus adapting to pipes of different diameters or weld seam areas of different widths, ensuring that the magnetic field covers the weld seam area.

[0017] In this invention, pressing the extrusion head causes the fixed ball to move horizontally, while simultaneously causing the fixed plate inside the electromagnetic yoke to compress the spring fixed thereto. This compresses the opening of the pressing tube, which is then fixedly connected to the magnetic powder suspension tank. When the extrusion head is released, the spring rebounds, increasing the negative pressure inside the connecting tube and drawing the magnetic powder suspension from the tank into the connecting tube. After pressing several times, the magnetic powder suspension flows through the pipe into the nozzle, allowing it to be evenly sprayed onto the weld area. This solves the problem that magnetic powder requires two people to operate, is inconvenient, and is prone to missed spraying, making it impossible to achieve simultaneous operation of powder spraying and magnetization. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a magnetic powder device for inspecting pipe welds proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the back structure of a magnetic powder device for inspecting pipe welds proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the connecting column of a magnetic powder device for inspecting pipe welds proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the internal electromagnetic yoke of a magnetic powder device for inspecting pipe welds proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the internal structure of the connecting pipe of a magnetic powder device for inspecting pipe welds proposed in this utility model.

[0023] Legend:

[0024] 1. Power supply box; 2. Plug; 3. Wire; 4. Electromagnetic yoke; 5. Connecting post; 6. Magnetic pole arm one; 7. Magnetic pole shoe; 8. Roller; 9. Rotating shaft; 10. Magnetic powder suspension box; 11. Rack one; 12. Gear one; 13. Rack two; 14. Gear two; 15. Magnetic pole arm two; 16. Nozzle; 17. Water pipe; 18. Extrusion head; 19. Connecting pipe; 20. Fixing ball one; 21. Spring; 22. Fixing plate; 23. Fixing ball two; 24. Pressing tube. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-5 An embodiment of this utility model is provided: a magnetic powder device for inspecting pipe welds, including an electromagnetic yoke 4, which is mainly used to apply a magnetic field to the weld area. A connecting column 5 is fixedly connected to the outer wall of the electromagnetic yoke 4, and an adjustment component is provided inside the connecting column 5.

[0027] The adjustment assembly includes rack 11, gear 12, and rack 2 13. Rack 11 is located inside the connecting column 5. One end of rack 11 is fixedly connected to magnetic pole arm 6, which is mainly used to fix magnetic pole shoe 7 and play a fixing role. Rack 11 and rack 2 13 are respectively meshed and connected to the two sides of the outer wall of gear 12. Gear 12 is mainly used to drive rack 11 to move horizontally, thereby controlling the distance between magnetic pole arm 6 and magnetic pole arm 2 15. A rotating shaft 9 is fixedly connected inside gear 12. Gear 2 14 is fixedly connected to the outer wall of rotating shaft 9. Rack 2 13 meshes with gear 2 14 and plays a role in pushing magnetic pole arm 2 15. One end of rack 2 13 is fixedly connected to magnetic pole arm 2 15.

[0028] Reference Figures 1-5The electromagnetic yoke 4 has a magnetic powder suspension tank 10 fixedly connected to its outer wall. The magnetic powder suspension tank 10 is mainly used to store the magnetic powder suspension and serves as a fixed storage unit. A connecting pipe 19 is installed inside the electromagnetic yoke 4. A spring 21 is installed inside the connecting pipe 19. Fixed plates 22 are fixedly connected to both ends of the spring 21. Fixed balls 20 are installed on the outer wall of the fixed plates 22. Fixed balls 20 are mainly used to block the pipe opening and serve as a seal. A fixed ball 23 is installed at the other end of the connecting pipe 19. A pressing pipe 24 is fixedly connected to one end of the connecting pipe 19. The pressing pipe 24 is mainly used to transport the magnetic powder suspension and serves as a conveying unit. The magnetic powder suspension tank 10 is fixedly connected to the other end of the pressing pipe 24. A water pipe 17 is fixedly connected to the other end of the connecting pipe 19. A squeezing head 18 is fixedly connected to the outer wall of the water pipe 17. The squeezing head 18 is mainly used for manual pressing, providing pressure to compress the spring 21. A spray nozzle 16 is fixedly connected to the other end of the water pipe 17. The spray nozzle 16 is a spray type nozzle. The electromagnetic yoke 4 is used to uniformly spray magnetic powder suspension onto a pipe. An electric wire 3 is electrically connected to the outer wall of the electromagnetic yoke 4, and a plug 2 is electrically connected to the outer wall of the plug 2. A power supply box 1 is fixedly connected to the outer wall of the plug 2. The power supply box 1 is mainly used to provide AC power for magnetizing the pipe. A magnetic pole shoe 7 is fixedly connected to the lower surface of the magnetic pole arm 6, and a roller 8 is fixedly connected inside the magnetic pole shoe 7. The roller 8 is mainly used to slide on the pipe surface and can move along the pipe axis. One end of the connecting column 5 is fixedly connected to the outer wall of the magnetic pole arm 6, and the other end of the connecting column 5 is fixedly connected to the outer wall of the magnetic pole arm 15. The outer wall of the pressing tube 24 is located inside the electromagnetic yoke 4. The electromagnetic yoke 4 is a CDX-I model, which is an existing structure and will not be described in detail here. The upper surface of the nozzle 16 is fixedly connected to the lower surface of the electromagnetic yoke 4. The outer wall of the fixing ball 20 is located inside the connecting tube 19. The outer wall of the extrusion head 18 is located inside the electromagnetic yoke 4. The outer wall of the power supply box 1 is located on one side of the outer wall of the electromagnetic yoke 4. The outer wall of the rotating shaft 9 is located inside the connecting column 5.

[0029] Working Principle: When a magnetic particle device for inspecting pipe welds is needed, the two magnetic pole shoes 7, located at both ends of the electromagnetic yoke 4, are first firmly placed on both sides of the weld surface of the pipe to be inspected. Then, the power supply box 1 is activated, and current flows through the wires into the magnetic yoke coil inside the electromagnetic yoke 4, energizing the yoke and forming a stable magnetic field. The electromagnetic yoke 4 transforms into an electromagnet, and the magnetic field enters the pipe surface from one magnetic pole shoe 7, crosses the weld, and returns to the other magnetic pole shoe 7, thus forming a complete closed magnetic circuit. When defects such as cracks, slag inclusions, or incomplete penetration exist inside the pipe weld, the local magnetic flux is disturbed, forming a leakage magnetic field. At this time, the magnetic powder suspension is evenly sprayed onto the surface of the weld inspection area through the device's spraying mechanism. Under the action of the leakage magnetic field, the magnetic powder is adsorbed around the defects, forming clearly visible magnetic traces. The operator can then use these traces to... The device can quickly identify the location and shape of weld defects and record them by image or manual means, improving the efficiency and accuracy of inspection. To adapt to pipes of different diameters and weld areas of different widths, the distance between the magnetic pole shoes 7 is adjustable. The specific adjustment process is as follows: rotate the rotating shaft 9 located on the side of the device, so that the gear 12 and gear 2 14 inside it mesh and rotate, which drives the rack 11 and rack 2 13 connected to the gear 12 and gear 2 14 to move synchronously or in opposite directions. The rack 11 and rack 2 13 are respectively fixedly connected to the magnetic pole arm 1 6 and magnetic pole arm 2 15, and the magnetic pole shoes 7 are connected below. The horizontal movement of the rack will drive the two magnetic pole shoes 7 to adjust left and right, thereby changing the magnetic pole spacing. This structure ensures that the magnetic poles can be precisely adjusted according to the actual weld width, so that the magnetic field can always fully cover the weld area and improve the defect detection coverage.

[0030] Furthermore, to achieve simultaneous magnetization and powder spraying, avoiding the problems of traditional equipment requiring two operators, uneven powder spraying, and low efficiency, this device is designed with an integrated magnetic powder spraying system. This system is located inside the electromagnetic yoke 4, and internally arranged a connecting pipe 19 and a pressing structure for driving hydraulic pressure. When the externally mounted pressing head 18 is pressed, it pushes the connected fixed ball 20 to move horizontally, thereby driving the fixed plate 22 fixed inside the electromagnetic yoke 4 to compress the spring 21. At the same time, the pressing tube component located at the end of the connecting pipe 19 squeezes the connected pressing tube 24, causing the opening of the pressing tube 24 to open, and the pressing tube 24 connects with the external... The magnetic powder suspension tank 10 is fixedly connected to the part. During the spring 21's rebound, a negative pressure is generated inside the connecting pipe 19, which draws the magnetic powder liquid in the magnetic powder suspension tank 10 into the column cavity. By repeatedly pressing the extrusion head 18, the magnetic powder suspension is continuously drawn in and transported to the nozzle 16 through the internally arranged water pipe 17. It is then evenly sprayed from the nozzle 16 onto the surface of the pipe weld for inspection. Through its integrated structural design, this device achieves simultaneous magnetization and powder spraying during the inspection process, effectively improving inspection efficiency and operational convenience, and ensuring the uniformity and reliability of magnetic powder distribution. It is particularly suitable for rapid non-destructive testing of welds in long-distance, curved, or high-altitude pipelines.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A magnetic powder device for pipeline weld inspection, comprising an electromagnetic yoke (4), characterized in that: The outer wall of the electromagnetic yoke (4) is fixedly connected to a connecting column (5), and an adjustment component is provided inside the connecting column (5); The adjustment assembly includes rack one (11), gear one (12) and rack two (13). Rack one (11) is disposed inside the connecting column (5). One end of rack one (11) is fixedly connected to magnetic pole arm one (6). Rack one (11) and rack two (13) are respectively meshed and connected to the two sides of the outer wall of gear one (12). A rotating shaft (9) is fixedly connected inside gear one (12). Gear two (14) is fixedly connected to the outer wall of the rotating shaft (9). One end of rack two (13) is fixedly connected to magnetic pole arm two (15).

2. A magnetic powder device for pipeline weld inspection according to claim 1, characterized in that: The outer wall of the electromagnetic yoke (4) is fixedly connected to a magnetic powder suspension tank (10). The electromagnetic yoke (4) is provided with a connecting pipe (19). The connecting pipe (19) is provided with a spring (21). The two ends of the spring (21) are fixedly connected to a fixing plate (22). The outer wall of the fixing plate (22) is provided with a fixing ball one (20). The other end of the connecting pipe (19) is provided with a fixing ball two (23). One end of the connecting pipe (19) is fixedly connected to a pressing pipe (24). The other end of the pressing pipe (24) is fixedly connected to the magnetic powder suspension tank (10). The other end of the connecting pipe (19) is fixedly connected to a water pipe (17). The outer wall of the water pipe (17) is fixedly connected to a squeezing head (18). The other end of the water pipe (17) is fixedly connected to a nozzle (16).

3. A magnetic powder device for detecting a weld of a pipe according to claim 1, characterized in that: The outer wall of the electromagnetic yoke (4) is electrically connected to a wire (3), the wire (3) is electrically connected to a plug (2), and the outer wall of the plug (2) is fixedly connected to a power supply box (1).

4. A magnetic powder device for detecting a weld of a pipe according to claim 1, characterized in that: A magnetic pole shoe (7) is fixedly connected to the lower surface of the magnetic pole arm (6), and a roller (8) is fixedly connected inside the magnetic pole shoe (7).

5. A magnetic powder device for detecting a weld of a pipe according to claim 1, characterized in that: One end of the connecting post (5) is fixedly connected to the outer wall of the first magnetic pole arm (6), and the other end of the connecting post (5) is fixedly connected to the outer wall of the second magnetic pole arm (15).

6. A magnetic powder device for detecting a weld of a pipe according to claim 2, characterized by: The outer wall of the pressing tube (24) is set inside the electromagnetic yoke (4), and the upper surface of the nozzle (16) is fixedly connected to the lower surface of the electromagnetic yoke (4).

7. A magnetic powder device for detecting a weld of a pipe according to claim 2, characterized by: The outer wall of the fixed ball (20) is disposed inside the connecting pipe (19), and the outer wall of the extrusion head (18) is disposed inside the electromagnetic yoke (4).

8. A magnetic powder device for detecting a weld of a pipe according to claim 3, characterized in that: The outer wall of the power box (1) is located on one side of the outer wall of the electromagnetic yoke (4), and the outer wall of the rotating shaft (9) is located inside the connecting column (5).

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