Tube plate welding seam magnetic defect detector

Abstract

The utility model provides a tube plate welding seam magnetic defect detector, which relates to the technical field of seam magnetic defect detectors and comprises a magnetizing device, a first mounting rack is fixedly connected to the bottom of the magnetizing device close to the left side, and a connecting shaft is rotatably connected between the inner surface walls of the first mounting rack. A second probe is fixedly connected to the outer surface of the connecting shaft, a second rotating shaft is rotationally connected to the position, close to the bottom, of the inner surface wall of the second probe, second rolling wheels are fixedly connected to the positions, close to the two ends, of the outer surface of the second rotating shaft, and a first probe is fixedly connected to the position, close to the right side, of the bottom of the magnetizing device. According to the device, the angle and the position of the second probe are flexibly adjusted, so that the device can quickly and accurately identify and display various defects on the surface and the near surface of a ferromagnetic material in a tube plate welding seam, the operation is simple, time and labor are saved, and the efficiency of magnetic powder detection can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of seam magnetic particle flaw detectors, in particular to a tube-sheet weld magnetic particle flaw detector. Background Art

[0002] Magnetic particle flaw detection is a non-destructive testing method used to detect defects on the surface and near the surface of ferromagnetic materials. It means that when the workpiece to be detected is magnetized, if there are defects on the surface or near the surface of the workpiece, the magnetic lines of force will be distorted at the defects, thus forming a leakage magnetic field. When magnetic powder is applied to the surface of the workpiece to be detected, the magnetic powder will be adsorbed under the action of the leakage magnetic field, forming magnetic marks corresponding to the shape of the defects. By observing the shape, size and distribution of the magnetic marks, the position, shape and size of the defects can be judged.

[0003] In the prior art, when detecting the tube-sheet weld with a magnetic particle flaw detector, it can only detect the tube-sheet at a planar angle, and for the tube-sheet weld at a vertical angle, the angle of the flaw detector needs to be changed, which is cumbersome and time-consuming, resulting in low detection efficiency. Therefore, in view of the above problems, we propose a new type of tube-sheet weld magnetic particle flaw detector. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem in the prior art that when detecting the tube-sheet weld with a magnetic particle flaw detector, it can only detect the tube-sheet at a planar angle, and for the tube-sheet weld at a vertical angle, the angle of the flaw detector needs to be changed, which is cumbersome and time-consuming, resulting in low detection efficiency, and to propose a tube-sheet weld magnetic particle flaw detector.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: a tube-sheet weld magnetic particle flaw detector, including a magnetization device. A first mounting frame is fixedly connected to the position near the left side of the bottom of the magnetization device. A connecting shaft is rotatably connected between the inner walls of the first mounting frame. A second probe is fixedly connected to the outer surface of the connecting shaft. A second rotating shaft is rotatably connected to the position near the bottom of the inner wall of the second probe. Second rollers are fixedly connected to the positions near both ends of the outer surface of the second rotating shaft. A first probe is fixedly connected to the position near the right side of the bottom of the magnetization device. A first rotating shaft is rotatably connected to the position near the bottom of the inner wall of the first probe. First rollers are fixedly connected to the positions near both ends of the outer surface of the first rotating shaft.

[0006] Preferably, a handle is fixedly connected to the top of the magnetization device, and the first rollers and the second rollers are at the same height.

[0007] Preferably, a plurality of limiting sleeves are fixedly connected to the front surface of the first mounting frame, and an embedded hole is formed at the position near the middle of the front surface of the connecting shaft.

[0008] Preferably, a tension spring is arranged inside the embedded hole, and a sliding block is slidably embedded inside the embedded hole.

[0009] Preferably, the front end of the tension spring is fixedly connected to the inner surface of the front side of the sliding block, and the rear end of the tension spring is fixedly connected to the inner surface of the rear side of the embedded hole.

[0010] Preferably, a limiting rod is fixedly connected to the front surface of the sliding block, and a pulling ring is fixedly connected to the front surface of the limiting rod.

[0011] Preferably, the outer surface of the limiting rod is in close fit with the inner surface of the limiting sleeve.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0013] 1. In the present utility model, by flexibly adjusting the angle and position of the second probe, the device can quickly and accurately identify and display various defects on the surface and near the surface of ferromagnetic materials in the tube sheet weld, and the operation is simple, saving time and effort, which can effectively improve the efficiency of magnetic particle testing.

[0014] 2. In the present utility model, through the mutual cooperation of the designed tension spring, limiting rod, limiting sleeve and pulling ring, after the second probe completes rotation and is adjusted to a vertical angle, even if it is affected by external forces during the working process, it can maintain its stability and will not flip or shift randomly, thus ensuring the accuracy and reliability of magnetic particle flaw detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of a magnetic particle flaw detector for tube sheet welds proposed by the present utility model;

[0016] Figure 2 is an unfolded view of a partial structure of a magnetic particle flaw detector for tube sheet welds proposed by the present utility model;

[0017] Figure 3 is a schematic diagram of a partial structure of a magnetic particle flaw detector for tube sheet welds proposed by the present utility model;

[0018] Figure 4 is a schematic diagram of the use of a magnetic particle flaw detector for tube sheet welds proposed by the present utility model.

[0019] Legend: 1. Magnetizing device; 11. Handle; 2. First probe; 21. First rotating shaft; 22. First roller; 3. First mounting bracket; 31. Limiting sleeve; 4. Connecting shaft; 41. Second probe; 42. Second rotating shaft; 43. Second roller; 5. Embedded hole; 51. Tension spring; 52. Sliding block; 53. Limiting rod; 54. Pulling ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0021] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0022] Embodiment 1: As Figures 1-4 shown, the present utility model provides a tube sheet weld magnetic particle flaw detector, which includes a magnetization device 1. A first mounting frame 3 is fixedly connected to a position near the left side of the bottom of the magnetization device 1. A connecting shaft 4 is rotatably connected between the inner walls of the first mounting frame 3. A second probe 41 is fixedly connected to the outer surface of the connecting shaft 4. A second rotating shaft 42 is rotatably connected to a position near the bottom of the inner wall of the second probe 41. Second rollers 43 are fixedly connected to positions near both ends of the outer surface of the second rotating shaft 42. A first probe 2 is fixedly connected to a position near the right side of the bottom of the magnetization device 1. A first rotating shaft 21 is rotatably connected to a position near the bottom of the inner wall of the first probe 2. First rollers 22 are fixedly connected to positions near both ends of the outer surface of the first rotating shaft 21. A handle 11 is fixedly connected to the top of the magnetization device 1. The first rollers 22 and the second rollers 43 are at the same height.

[0023] The effect achieved by the entire Embodiment 1 is that when using this device to detect the magnetic particle flaw detector for the tube sheet weld seam, when performing magnetic particle flaw detection on the tube sheet weld seam at a planar angle, first activate the magnetization device 1, and the built-in electromagnet therein immediately generates a strong magnetic field. Under its action, the electromagnet of the magnetization device 1 generates a magnetic field. Then, evenly sprinkle an appropriate amount of magnetic powder on the area of the tube sheet weld seam to be detected. At this time, the magnetic field acts on the atoms or molecules in the tube sheet, inducing them to generate magnetism, so that potential defects (such as cracks, pores, etc.) form visible magnetic traces under the action of the magnetic powder. Then, through the operation handle 11, drive the magnetization device 1 and its attached first probe 2 to move along the weld seam. During this process, the first roller 22 rolls smoothly under the guidance of the first rotating shaft 21, ensuring the smooth progress of the flaw detection process. At the same time, the second probe 41 and its second roller 43 move synchronously with the assistance of the first mounting bracket 3, and the two work together to ensure that the magnetic powder is evenly distributed on the tube sheet surface and effectively shows defects. By rotating the connecting shaft 4, the second probe 41 and its second roller 43 are rotated 90 degrees, so as to adjust to an angle matching the vertical weld seam. At this time, the first roller 22 still remains in the horizontal plane, while the second roller 43 is aligned with the vertical weld seam. After adjusting the angle, activate the magnetization device 1 again, and move the magnetization device 1 and the probe combination along the direction of the vertical weld seam. The second roller 43 will roll at a vertical angle under the action of the second rotating shaft 42, cooperating with the horizontal movement of the first roller 22 to achieve comprehensive magnetic particle flaw detection of the vertical weld seam. This design not only simplifies the operation process but also significantly improves the flaw detection efficiency, especially suitable for the detection of multi-angle weld seams in complex structures. By flexibly adjusting the angle and position of the second probe 41, this device can quickly and accurately identify and display various defects on the surface and near the surface of ferromagnetic materials in the tube sheet weld seam, and the operation is simple, time-saving and labor-saving, which can effectively improve the efficiency of magnetic particle detection.

[0024] Embodiment 2: As Figures 1-4 shown, a plurality of limit sleeves 31 are fixedly connected to the front surface of the first mounting bracket 3. An inner embedding hole 5 is opened at a position near the middle on the front surface of the connecting shaft 4. A tension spring 51 is arranged inside the inner embedding hole 5. A sliding block 52 is slidably embedded inside the inner embedding hole 5. The front end of the tension spring 51 is fixedly connected to the inner surface of the front side of the sliding block 52, and the rear end of the tension spring 51 is fixedly connected to the inner surface of the rear side of the inner embedding hole 5. A limit rod 53 is fixedly connected to the front surface of the sliding block 52, and a pull ring 54 is fixedly connected to the front surface of the limit rod 53.

[0025] The effect achieved by the entire Embodiment 2 is that when it is necessary to detect the weld of the tube sheet at a vertical angle, the second probe 41 needs to be rotated to the corresponding vertical position through the connecting shaft 4. As the second probe 41 rotates, the operator will push the limit rod 53 outwards, causing the sliding block 52 to move correspondingly within the embedded hole 5 and simultaneously stretching the tension spring 51 connected thereto. The initial state of the tension spring 51 is compressed, so it will be gradually stretched under the action of an external force. One end of the tension spring 51 is connected to the pull ring 54. As the tension spring is stretched, the pull ring 54 will also rotate. This rotation process is to adjust the position of the pull ring so that the locking function can be smoothly achieved in the subsequent steps. When the second probe 41 rotates to the predetermined position (i.e., a 90-degree vertical angle), the operator releases the pull ring 54. At this time, due to the resilience of the tension spring 51, it will quickly contract, driving the pull ring 54 and the sliding block 52 to move into the embedded hole 5. During this process, the limit rod 53 will accurately coincide with the limit sleeve 31 fixed on the first mounting bracket 3, and under the combined action of the two, the second probe 41 will be firmly locked in the current position. Through this design, after the second probe 41 completes rotation and is adjusted to the vertical angle, even if it is affected by an external force during operation, it can maintain its stability and will not flip or shift randomly, thus ensuring the accuracy and reliability of magnetic particle flaw detection.

[0026] Working principle: When using this device to detect the magnetic particle flaw detector of the tube sheet weld, when performing magnetic particle flaw detection on the tube sheet weld of a planar angle, first activate the magnetization device 1. The electromagnet of the magnetization device 1 generates a magnetic field. Then, evenly sprinkle an appropriate amount of magnetic powder on the area of the tube sheet weld to be detected, so that potential defects (such as cracks, pores, etc.) form visible magnetic traces under the action of the magnetic powder. Then, through the operation handle 11, drive the magnetization device 1 and its attached first probe 2 to move along the weld. The first roller 22 rolls smoothly under the guidance of the first rotating shaft 21. At the same time, the second probe 41 and its second roller 43 move synchronously with the assistance of the first mounting bracket 3. The two work together to ensure that the magnetic powder is evenly distributed on the tube sheet surface and effectively shows the defects. By rotating the connecting shaft 4, the second probe 41 and its second roller 43 are rotated by 90 degrees, so as to adjust to an angle matching the vertical weld. At this time, the first roller 22 still remains in the horizontal plane, while the second roller 43 is aligned with the vertical weld. After adjusting the angle, activate the magnetization device 1 again and move the magnetization device 1 and the probe combination along the direction of the vertical weld. The second roller 43 will roll at a vertical angle under the action of the second rotating shaft 42, cooperating with the horizontal movement of the first roller 22 to achieve comprehensive magnetic particle flaw detection of the vertical weld. This design not only simplifies the operation process but also significantly improves the flaw detection efficiency, especially suitable for the detection of multi-angle welds in complex structures. By flexibly adjusting the angle and position of the second probe 41, this device can quickly and accurately identify and display various defects on the surface and near the surface of ferromagnetic materials in the tube sheet weld. Moreover, the operation is simple, time-saving and labor-saving, which can effectively improve the efficiency of magnetic particle detection. And, when it is necessary to detect the tube sheet weld at a vertical angle, as the second probe 41 rotates, the operator will push the limit rod 53 outwards, so that the sliding block 52 moves correspondingly in the embedded hole 5 and simultaneously stretches the connected tension spring 51. As the tension spring is stretched, the pull ring 54 will also rotate. When the second probe 41 rotates to the predetermined position (i.e., a 90-degree vertical angle), the operator releases the pull ring 54. At this time, due to the rapid contraction of the tension spring 51, it drives the pull ring 54 and the sliding block 52 to move into the embedded hole 5. During this process, the limit rod 53 will accurately coincide with the limit sleeve 31 fixed on the first mounting bracket 3, and under the combined action of the two, the second probe 41 is firmly locked in the current position. Through this design, after the second probe 41 completes rotation and adjusts to the vertical angle, even if it is affected by external forces during the working process, it can maintain its stability and will not flip or shift randomly, thus ensuring the accuracy and reliability of the magnetic particle flaw detection.

[0027] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A tube sheet weld magnetic particle flaw detector, comprising a magnetization device (1), characterized in that: A first mounting bracket (3) is fixedly connected to the bottom of the magnetization device (1) near the left side. A connecting shaft (4) is rotatably connected between the inner surfaces of the first mounting bracket (3). A second probe (41) is fixedly connected to the outer surface of the connecting shaft (4). A second rotating shaft (42) is rotatably connected to the inner surface of the second probe (41) near the bottom. Second rollers (43) are fixedly connected to both ends of the outer surface of the second rotating shaft (42). A first probe (2) is fixedly connected to the bottom of the magnetization device (1) near the right side. A first rotating shaft (21) is rotatably connected to the inner surface of the first probe (2) near the bottom. First rollers (22) are fixedly connected to both ends of the outer surface of the first rotating shaft (21).

2. The magnetic particle flaw detector for tube sheet welds according to claim 1, wherein: A handle (11) is fixedly connected to the top of the magnetization device (1). The first rollers (22) and the second rollers (43) are at the same height.

3. The magnetic particle flaw detector for tube sheet welds according to claim 2, characterized in that: A plurality of limit sleeves (31) are fixedly connected to the front surface of the first mounting bracket (3). An embedded hole (5) is formed in the front surface of the connecting shaft (4) near the middle.

4. The magnetic particle flaw detector for tube sheet welds according to claim 3, characterized in that: A tension spring (51) is arranged inside the embedded hole (5). A sliding block (52) is slidably embedded inside the embedded hole (5).

5. The magnetic particle flaw detector for tube sheet welds according to claim 4, wherein: The front end of the tension spring (51) is fixedly connected to the inner surface of the front side of the sliding block (52). The rear end of the tension spring (51) is fixedly connected to the inner surface of the rear side of the embedded hole (5).

6. The magnetic particle flaw detector for tube sheet welds according to claim 5, wherein: A limit rod (53) is fixedly connected to the front surface of the sliding block (52). A pull ring (54) is fixedly connected to the front surface of the limit rod (53).

7. The magnetic particle flaw detector for tube sheet welds according to claim 6, characterized in that: The outer surface of the limit rod (53) is in close fit with the inner surface of the limit sleeve (31).

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