A magnetic particle flaw detector capable of detecting weld seams in structural frames

Abstract

This utility model relates to the field of magnetic particle inspection technology, specifically to a magnetic particle flaw detector capable of detecting weld seams in a frame. It allows for flexible operation within the frame, improving the accuracy and flexibility of the inspection. Its structure includes a flaw detector body, a flaw detector main unit, and a first magnetizing switch. The first magnetizing switch is located in the flaw detector body. The flaw detector main unit and the flaw detector body are electrically connected via a connecting wire. A handle is located on the side of the flaw detector body away from the workpiece being tested. The handle is rotatably connected to the flaw detector body. The flaw detector body has an angle adjustment structure for adjusting the handle. A movable measuring structure is located at the end of the flaw detector body that contacts the workpiece being tested. This utility model, through the design of movable joints and movable contacts, allows the detection end to flexibly adapt to complex weld seams, improving the inspection coverage and flexibility. The angle-adjustable handle adapts to different operating postures, reducing operator fatigue and providing convenience for inspection.

Description

Technical Field

[0001] This utility model relates to the field of magnetic particle testing technology, and in particular to a magnetic particle tester capable of detecting weld seams in structural frames. Background Technology

[0002] A magnetic particle flaw detector for inspecting weld seams is a non-destructive testing device based on the principle of magnetic particle testing, specifically designed for inspecting surface and near-surface defects in weld seams of ferromagnetic material structures, such as mechanical frames, steel structures, and vehicle chassis. Its core function is to visually display potential defects in the weld seam, such as cracks, porosity, slag inclusions, and lack of fusion, through the interaction of a magnetic field and magnetic particles, thereby assessing weld quality and structural safety.

[0003] In industrial production, the quality of weld seams in a structural framework directly affects the safety and reliability of the overall structure. However, traditional magnetic particle inspection instruments have many limitations when inspecting weld seams: the narrow internal space of the framework, coupled with obstacles such as cables, severely restricts the inspection space. Ordinary magnetic particle inspection instruments lack flexibility, requiring frequent removal of obstacles and adjustment of equipment angles during inspection, making effective operation difficult and hindering accurate detection of weld defects. This not only affects inspection efficiency but may also cause some potential defects to go undetected, posing safety hazards to the use of the framework. Utility Model Content

[0004] The main purpose of this invention is to provide a magnetic particle flaw detector that can detect weld seams in a frame, and can operate flexibly inside the frame, thus improving the accuracy and flexibility of the detection.

[0005] The technical solution of this utility model is as follows:

[0006] A magnetic particle flaw detector capable of detecting weld seams in a frame includes a flaw detector body, a flaw detector main unit, and a first magnetizing switch. The first magnetizing switch is located in the flaw detector body. The flaw detector main unit is electrically connected to the flaw detector body via a connecting wire. A handle is provided on the side of the flaw detector body away from the workpiece being tested.

[0007] The handle is rotatably connected to the flaw detector body, the flaw detector body is provided with an angle adjustment structure for adjusting the handle, and the end of the flaw detector body that contacts the workpiece being tested is provided with a movable measuring structure.

[0008] In one possible implementation, the angle adjustment structure includes a positioning pin, an angle adjustment groove, an angle adjustment block, and a plurality of positioning grooves;

[0009] The angle adjustment groove is located on the side of the flaw detector body facing the handle. One end of the angle adjustment block is fixedly connected to the side of the handle facing the flaw detector body. The angle adjustment block and the angle adjustment groove are slidably connected. Each of the positioning grooves is located on the side of the handle facing the angle adjustment block and is arranged in sequence. The positioning pin is slidably connected inside the flaw detector body and is embedded in one of the positioning grooves facing the handle.

[0010] In one possible implementation, the movable measuring structure includes a movable joint and a movable contact, with one end of the movable joint rotatably connected to the flaw detector body and the other end of the movable joint rotatably connected to the movable contact.

[0011] In one possible implementation, a second magnetizing switch is included, which is located on the side of the handle facing the positioning groove.

[0012] In one possible implementation, the flaw detector host includes a display screen and a keyboard. The flaw detector host and the flaw detector body are respectively provided with a first socket and a second socket, and the first socket and the second socket are electrically connected by a connecting cable.

[0013] In one possible implementation, the flaw detector body has a camera mounting base at the end near the workpiece being tested, the camera mounting base has a mounting groove at the connection between the camera mounting base and the flaw detector body, the camera is mounted on the end of the camera mounting base facing the workpiece being tested, and the camera is electrically connected to the flaw detector host.

[0014] In one possible implementation, the flaw detector body has a lighting pole for mounting a lighting lamp at one end near the workpiece being tested. The lighting pole extends toward the workpiece being tested, and the lighting lamp is located at the end of the lighting pole facing the workpiece being tested. The lighting lamp is electrically connected to the flaw detector main unit.

[0015] In one possible implementation, the movable joint has a tenon on the side facing the movable contact, and the movable contact has a mortise on the side facing the movable joint, with the tenon and mortise engaging in a tenon-mortise joint.

[0016] In one possible implementation, the cross-section of the handle facing the flaw detector body is arc-shaped, and each of the positioning grooves is arranged sequentially at intervals along its circumference.

[0017] The working principle and beneficial effects of this utility model are as follows:

[0018] First, pull the locating pin upwards, rotate the handle to the desired angle, and then release the locating pin so that it is inserted into the locating hole, thus completing the handle angle adjustment. During inspection, align the end with the movable measuring structure with the weld seam, adjust the movable contact through the movable joint to make the movable contact flexibly contact the workpiece, and operate the first magnetizing switch or the second magnetizing switch to magnetize the weld seam according to the position of the workpiece being measured.

[0019] The design of the movable joint and movable contact allows the inspection end to flexibly adapt to complex welds, improving inspection coverage and flexibility. The angle-adjustable handle accommodates different operating postures, reducing operator fatigue and providing convenience for inspection. Meanwhile, the dual magnetization switch design allows operators to easily control the magnetization state of the flaw detector according to actual usage conditions. Furthermore, the separate design of the main unit and the flaw detector body balances portability and functional integration, comprehensively improving inspection efficiency and accuracy, and making it suitable for various weld inspection scenarios. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0022] Figure 2 This is a cross-sectional view used to illustrate the angle adjustment structure in this embodiment;

[0023] Figure 3 This is an enlarged view of the angle adjustment structure in this example;

[0024] Figure 4 This is a cross-sectional view used to illustrate the positioning groove in this embodiment;

[0025] Figure 5 This is a schematic diagram of the structure of this embodiment;

[0026] Figure 6 This is a cross-sectional view used in this embodiment to show the angle adjustment groove and the angle adjustment block;

[0027] Figure 7 This is a cross-sectional view used to illustrate the mounting slot, camera base, and camera in this embodiment;

[0028] Figure 8 This is an enlarged view of the mounting slot, camera base, and camera structure in this embodiment;

[0029] Figure 9 This is a schematic diagram illustrating the operation of this embodiment.

[0030] Explanation of icon numbers:

[0031] 1. Flaw detector body; 11. Second socket; 2. Handle; 3. Angle adjustment structure; 31. Positioning pin; 32. Angle adjustment groove; 33. Angle adjustment block; 34. Positioning groove; 41. First magnetization switch; 42. Second magnetization switch; 5. Flaw detector host; 51. Display screen; 52. Keyboard; 53. First socket; 6. Movable measuring structure; 61. Movable joint; 611. Tenon; 62. Movable contact; 621. Mortising; 71. Camera base; 72. Mounting groove; 73. Camera; 81. Lighting lamp; 82. Lighting lamp pole; 9. Connecting cable.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0034] like Figures 1-9 As shown, this embodiment provides a magnetic particle flaw detector capable of detecting weld seams in a frame. Its structure includes a flaw detector body 1, a flaw detector host 5, and a first magnetization switch 41. The first magnetization switch 41 is located on the flaw detector body 1. The flaw detector host 5 and the flaw detector body 1 are electrically connected via a connecting line 9. A handle 2 is provided on the side of the flaw detector body 1 away from the workpiece being tested. The flaw detector body 1 is the load-bearing foundation of the structure in this embodiment.

[0035] The flaw detector body 1 has a movable measuring structure 6 at the end that contacts the workpiece being tested. This structure can be adaptively adjusted according to the specific shape of the weld seam of the frame being tested. Specifically, the movable measuring structure 6 includes a movable joint 61 and a movable contact 62. The movable joint 61 serves as the connecting core, while the movable contact 62 is the component that directly contacts the workpiece. One end of the movable joint 61 is rotatably connected to the flaw detector body 1, and the other end is rotatably connected to the movable contact 62. This dual-rotation connection design allows the movable contact 62 to rotate flexibly at multiple angles, easily conforming to complex curved surfaces, corners, and other difficult-to-detect areas of the frame weld seam. This ensures close contact with the workpiece, effectively avoiding blind spots and errors caused by poor contact, and significantly improving the flexibility, comprehensiveness, and accuracy of the inspection.

[0036] In this embodiment, all rotating connections are preferably shaft connections. The advantages of this method are that it allows for flexible rotation, meeting the multi-angle rotation requirements of the movable joint 61 and the flaw detector body 1, and the movable joint 61 and the movable contact 62, adapting to the complex shape of the frame weld. The precise fit and small clearance between the shaft and the hole ensure stable contact between the movable contact 62 and the workpiece, reducing detection errors caused by loosening. Furthermore, its strong wear resistance and good load-bearing capacity allow it to withstand the contact pressure during long-term testing, extending the service life of this embodiment.

[0037] In this embodiment, the movable joint 61 has a tenon 611 on the side facing the movable contact 62, and the movable contact 62 has a mortise 621 on the side facing the movable joint 61. The tenon 611 and the mortise 621 fit together, enhancing the stability and firmness of the connection between the movable joint 61 and the movable contact 62, and reducing loosening due to vibration or contact pressure during the testing process. At the same time, it makes the rotation of the movable contact 62 smoother and more controllable, ensuring the accuracy of the testing in this embodiment.

[0038] In this embodiment, the flaw detector body 1 is provided with an angle adjustment structure 3 for adjusting the handle 2. The handle 2 is rotatably connected to the flaw detector body 1. The operator can flexibly adjust the handle 2 according to the usage habits or actual detection scenarios, which increases the adaptability of this embodiment to multiple workpieces and multiple scenarios.

[0039] In this embodiment, the angle adjustment structure 3 includes a positioning pin 31, an angle adjustment groove 32, an angle adjustment block 33, and several positioning grooves 34. The angle adjustment groove 32 is located on the side of the flaw detector body 1 facing the handle 2. One end of the angle adjustment block 33 is fixedly connected to the side of the handle 2 facing the flaw detector body 1. The angle adjustment block 33 is slidably connected to the angle adjustment groove 32. The angle adjustment block 33 can slide along the guide of the angle adjustment groove 32. Several angle adjustment blocks 33 are provided and all of them are slidably connected to the angle adjustment groove 32, which improves the stability during angle adjustment and reduces the offset and jamming during the adjustment process.

[0040] Each positioning slot 34 is located on the side of the handle 2 facing the angle adjustment block 33 and arranged sequentially. The orderly arrangement of the positioning slots 34 provides the handle 2 with multiple preset angles, allowing the operator to select the appropriate angle according to the actual situation, meeting the requirements of different usage scenarios and operating habits, and enhancing the flexibility of angle adjustment. The positioning pin 31 is slidably connected to the flaw detector body 1, allowing it to flexibly enter and exit the positioning slot 34. When the positioning pin 31 is embedded in one of the positioning slots 34 with the end facing the handle 2, it can firmly fix the handle 2 at the current angle. At the same time, the sliding function allows the operator to easily adjust the angle at any time, realizing convenient switching between angle adjustment and fixation, and improving the practicality of this embodiment.

[0041] When the angle of handle 2 needs to be adjusted, push the positioning pin 31 outward, and handle 2 will disengage from the limit of positioning pin 31. Rotate handle 2 to drive angle adjusting block 33 to rotate in angle adjusting groove 32, thus initially achieving angle adjustment. After rotating to the desired angle, release positioning pin 31. Positioning pin 31 will spring back into the nearest positioning groove 34. If it does not spring back into positioning groove 34, the operator can slightly move handle 2 in the direction of the desired angle, causing the positioning groove 34 closest to positioning pin 31 to move closer to positioning pin 31, so that positioning pin 31 returns to positioning groove 34.

[0042] In this embodiment, the cross-section of the handle 2 facing the flaw detector body 1 is arc-shaped. When the handle 2 is rotated to adjust the angle, the arc-shaped surface can reduce friction and interference between it and the flaw detector body 1, making the rotation process smoother. Each positioning groove 34 is arranged sequentially at intervals along its circumference and matches the arc-shaped cross-section of the handle 2, so that the positioning pin 31 can be accurately embedded in the positioning groove 34 at different positions, making the angle adjustment more uniform and stable.

[0043] In this embodiment, the first magnetization switch 41 is located on the side of the flaw detector body 1 away from the handle 2, and the handle 2 facing the positioning groove 34 is also provided with a second magnetization switch 42. Both the flaw detector body 1 and the handle 2 are provided with magnetization switches. This dual magnetization switch design allows the operator to control the magnetization state according to the actual usage situation, such as different test scenarios corresponding to different test grip postures. When holding the flaw detector body 1 or the handle 2, the operator can control the magnetization state, which improves the flexibility of operation.

[0044] like Figure 1 As shown, in this embodiment, the flaw detector host 5 includes a display screen 51 and a keyboard 52 for inputting commands. The flaw detector host 5 and the flaw detector body 1 are respectively provided with a first port 53 and a second port 11. The first port 53 and the second port 11 are electrically connected via a connecting cable 9, realizing a stable electrical connection and data transmission between the flaw detector host 5 and the flaw detector body 1. This connection method ensures that the detection signals collected by the flaw detector body 1 can be accurately transmitted to the flaw detector host 5 for processing, guaranteeing the test data processing capability of this embodiment. Simultaneously, the flaw detector host 5 also has a built-in lithium battery pack that can continuously power the flaw detector body 1, improving the portability of this embodiment.

[0045] like Figure 7 , 8As shown, in this embodiment, a mounting groove 72 is provided at the connection between the camera base 71 and the flaw detector body 1. The camera base 71 is bolted to the flaw detector body 1 through the mounting groove 72, ensuring that the camera base 71 can be firmly fixed on the flaw detector body 1, reducing its positional displacement caused by vibration and other factors during the inspection process. A camera 73 is provided at the end of the camera base 71 facing the workpiece being tested, which can accurately align with the area being tested and can collect image information of the weld in real time. The camera 73 is electrically connected to the flaw detector host 5, and can transmit the collected image information to the flaw detector host 5 in real time, and display it on the display screen 51, which allows the operator to clearly and intuitively observe the weld condition, improving the accuracy and reliability of the inspection.

[0046] In this embodiment, camera 73 is preferably a miniature camera. Its advantages lie in its small size (typically about 10-15mm in diameter and 20-30mm in length) while clearly capturing minute defects on the weld surface. It also supports USB 3.0 or GigE interfaces, allowing for a stable connection to the flaw detector host 5 via cable 9, with a transmission rate exceeding 5Gbps. This enables real-time transmission of high-definition images to the host, which, combined with the display screen 51, provides a clear view, facilitating intuitive observation by operators and improving the accuracy and reliability of the inspection.

[0047] like Figure 5 As shown, in this embodiment, the flaw detector body 1 has a lighting pole 82 for mounting a lighting lamp 81 at the end near the workpiece being tested. The lighting pole 82 extends towards the workpiece being tested, allowing the light to be more concentrated on the inspection area, improving the targeting and effectiveness of the lighting. The lighting lamp 81 is located at the end of the lighting pole 82 facing the workpiece being tested, which can accurately project light onto the weld surface, reduce shadows in the inspection area, facilitate the camera to acquire high-quality images, and also facilitate direct observation by the operator. The lighting lamp 81 is electrically connected to the flaw detector host 5, and the lithium battery pack inside the flaw detector host 5 can provide a stable power supply for the lighting lamp 81, improving the accuracy of the inspection in this embodiment.

[0048] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0049] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A magnetic particle flaw detector capable of detecting weld seams in a frame, comprising a flaw detector body (1), a flaw detector main unit (5), and a first magnetizing switch (41), wherein the first magnetizing switch (41) is disposed on the flaw detector body (1), the flaw detector main unit (5) is electrically connected to the flaw detector body (1) via a connecting line (9), and a handle (2) is provided on the side of the flaw detector body (1) away from the workpiece being tested, characterized in that, The handle (2) is rotatably connected to the flaw detector body (1). The flaw detector body (1) is provided with an angle adjustment structure (3) for adjusting the handle (2). The flaw detector body (1) is provided with a movable measuring structure (6) at the end that contacts the workpiece being tested.

2. A magnetic particle flaw detector capable of detecting a weld line of a framework according to claim 1, characterized in that, The angle adjustment structure (3) includes a positioning pin (31), an angle adjustment groove (32), an angle adjustment block (33), and several positioning grooves (34); The angle adjustment groove (32) is located on the side of the flaw detector body (1) facing the handle (2). One end of the angle adjustment block (33) is fixedly connected to the side of the handle (2) facing the flaw detector body (1). The angle adjustment block (33) is slidably connected to the angle adjustment groove (32). Each of the positioning grooves (34) is located on the side of the handle (2) facing the angle adjustment block (33) and arranged in sequence. The positioning pin (31) is slidably connected to the flaw detector body (1) and is embedded in one of the positioning grooves (34) facing the handle (2).

3. A magnetic particle flaw detector capable of detecting a weld line of a framework according to claim 2, characterized in that, The movable measuring structure (6) includes a movable joint (61) and a movable contact (62). One end of the movable joint (61) is rotatably connected to the flaw detector body (1), and the other end of the movable joint (61) is rotatably connected to the movable contact (62).

4. A magnetic particle flaw detector capable of detecting a weld line of a framework according to claim 3, characterized in that, Includes a second magnetizing switch (42), which is located on the side of the handle (2) facing the positioning groove (34).

5. A magnetic particle flaw detector for detecting weld seams in a frame, as described in claim 4, is characterized in that, The flaw detector host (5) includes a display screen (51) and a keyboard (52). The flaw detector host (5) and the flaw detector body (1) are respectively provided with a first socket (53) and a second socket (11). The first socket (53) and the second socket (11) are electrically connected by a connecting cable (9).

6. A magnetic particle flaw detector for detecting weld seams in a frame, as described in claim 5, is characterized in that, The flaw detector body (1) has a camera mounting base (71) at the end near the workpiece to be tested. The camera mounting base (71) is connected to the flaw detector body (1) with a mounting groove (72). The camera mounting base (71) has a camera (73) at the end facing the workpiece to be tested. The camera (73) is electrically connected to the flaw detector host (5).

7. A magnetic particle flaw detector for detecting weld seams in a frame, as described in claim 6, is characterized in that, The flaw detector body (1) has a lighting pole (82) for installing a lighting lamp (81) at one end near the workpiece to be tested. The lighting pole (82) extends toward the workpiece to be tested. The lighting lamp (81) is located at the end of the lighting pole (82) toward the workpiece to be tested. The lighting lamp (81) is electrically connected to the flaw detector host (5).

8. A magnetic particle inspection instrument for detecting weld seams of a frame according to claim 7, characterized in that, The movable joint (61) has a tenon (611) on the side facing the movable contact (62), and the movable contact (62) has a mortise (621) on the side facing the movable joint (61). The tenon (611) and the mortise (621) are mortised and tenoned together.

9. A magnetic particle flaw detector for detecting weld seams of a frame according to claim 4, characterized in that, The handle (2) has an arc-shaped cross-section facing the flaw detector body (1), and each of the positioning grooves (34) is arranged at intervals along its circumference.

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