Magnetic particle flaw detector with protective structure

Abstract

The utility model discloses a magnetic particle flaw detector with protection structure belongs to magnetic particle flaw detector technical field. Including frame, the installation groove is seted up in the frame, the four corners of frame all are fixedly installed with support column, the common installation of support column has roof, the fixed mounting of first air cylinder has on the roof, and the first air cylinder output end penetrates out roof disease fixed mounting has apron, and the spray pipe is installed in the apron, and the hose is connected between the spray pipe and the installation groove, and the first air cylinder piston rod stretches out, drives apron to move downward, until completely covers the installation groove top, forms a relatively closed detection space, and effectively limits the splash range of magnetic suspension in subsequent spraying and magnetization process, and the magnetic suspension is transported to the spray pipe through the hose, and is evenly sprayed on the workpiece surface through the nozzle, makes the workpiece surface fully wet and covers a layer of magnetic particle suspension and carries out the flaw detection.

Description

Technical Field

[0001] This utility model relates to the field of magnetic particle flaw detector technology, and in particular to a magnetic particle flaw detector with a protective structure. Background Technology

[0002] Magnetic particle testing, a widely used non-destructive testing technique, is mainly used to detect defects such as cracks, inclusions, and folds on and near the surface of ferromagnetic material workpieces. Its basic principle is to apply a magnetic field to the workpiece, magnetizing it. When discontinuities exist in the workpiece, a leakage magnetic field is generated at the defect location, attracting magnetic powder applied to the workpiece surface and forming a visible magnetic trace, thus achieving visual detection of the defect.

[0003] Traditional magnetic particle inspection often relies on manual visual inspection, requiring operators to closely observe the accumulation of magnetic particles on the workpiece surface under white light or ultraviolet light. However, this method has several limitations: First, manual inspection is greatly affected by factors such as operator experience, visual fatigue, and ambient light, easily leading to missed or incorrect detections; second, when using fluorescent magnetic particles, prolonged exposure to ultraviolet light can potentially harm the eyes and skin; and third, the sprayed magnetic suspension is prone to splashing, not only polluting the working environment but also posing a threat to the health of operators.

[0004] While some existing magnetic particle inspection equipment has basic magnetization and spraying functions, it is still insufficient in terms of automation, intelligence and safety protection. For example, the workpiece inspection area is mostly an open structure, lacking effective splash prevention and sealing measures. Utility Model Content

[0005] The purpose of this invention is to provide a magnetic particle flaw detector with a protective structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A magnetic particle flaw detector with a protective structure includes a frame with an internal mounting groove for placing a workpiece. Support columns are fixedly installed at the four corners of the frame, and a top plate is mounted on each support column. A first cylinder is fixedly installed on the top plate, and a cover plate is fixedly installed on the top plate through the output end of the first cylinder. A spray pipe is installed inside the cover plate, and a flexible hose connects the spray pipe to the mounting groove.

[0008] Preferably, a baffle is fixedly installed in the mounting groove, and an inclined plate is fixedly installed between the baffle and the inner sidewall of the mounting groove, and a grid is provided on the inclined plate.

[0009] Preferably, the baffle has a slot, a storage box is placed in the mounting slot, the storage box is located below the baffle, and the flexible tube is connected to the storage box.

[0010] Preferably, a second cylinder is fixedly installed on the bottom surface of the mounting groove, and the movable end of the second cylinder is fixed to the grille.

[0011] Preferably, a sealing strip is installed between the second cylinder and the inclined plate.

[0012] Preferably, a slide rail is fixedly installed on the frame, a support frame is slidably installed on the slide rail, and an ultraviolet lamp and an industrial camera are installed on the support frame.

[0013] Compared with the prior art, this utility model provides a magnetic particle flaw detector with a protective structure, which has the following beneficial effects:

[0014] By extending the piston rod of the first cylinder, the cover plate moves downward until it completely covers the top of the mounting groove, forming a relatively enclosed detection space. This effectively limits the splashing range of the magnetic suspension during subsequent spraying and magnetization. The magnetic suspension is then transported to the spray pipe through a hose and evenly sprayed onto the workpiece surface through the nozzle, fully wetting the workpiece surface and covering it with a layer of magnetic powder suspension. Simultaneously or shortly after spraying, the equipment's magnetization coil applies a magnetic field to the workpiece, magnetizing it. If there are defects such as cracks on the workpiece surface, a leakage magnetic field will be generated at the defect location, attracting the surrounding magnetic powder and forming a clearly visible magnetic mark. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a magnetic particle flaw detector with a protective structure proposed in this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of a magnetic particle flaw detector with a protective structure proposed in this utility model.

[0017] Figure 3 This is a schematic diagram of the installation position of the storage box of a magnetic particle flaw detector with a protective structure proposed in this utility model.

[0018] Figure 4 This is a schematic diagram of the support frame structure of a magnetic particle flaw detector with a protective structure proposed in this utility model.

[0019] In the diagram: 1. Frame; 11. Mounting slot; 12. Support column; 13. Top plate; 14. Baffle; 141. Groove; 15. Inclined plate; 151. Sealing strip; 16. Grille; 17. Slide rail; 2. First cylinder; 3. Cover plate; 4. Spray pipe; 5. Hose; 6. Storage box; 7. Second cylinder; 8. Support frame; 9. Ultraviolet lamp; 10. Industrial camera. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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 utility model 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, they should not be construed as limitations on this utility model.

[0022] Example:

[0023] Reference Figures 1-4 A magnetic particle flaw detector with a protective structure includes a frame 1. The frame 1 has an internal mounting groove 11 where a workpiece is placed. Magnetizing coils are mounted on the side walls of the mounting groove 11. Support columns 12 are fixedly mounted at each of the four corners of the frame 1, and a top plate 13 is mounted on each support column 12, thus forming a stable three-dimensional frame structure. A first cylinder 2 is fixedly mounted on the top plate 13, and the output end of the first cylinder 2 extends through the top plate 13. A cover plate 3 is fixedly mounted on the cover plate 13, and the cover plate 3 can be opened by the first cylinder. Driven by cylinder 2, it reciprocates vertically to open and close the mounting groove 11. The cover plate 3 is hollow and has a spray pipe 4 installed inside. The spray pipe 4 has multiple small nozzles that can atomize the magnetic suspension liquid and spray it evenly onto the workpiece surface. A flexible hose 5 is connected between the spray pipe 4 and the mounting groove 11 for connecting to an external magnetic suspension liquid pumping system. Because the hose 5 is flexible, it will not be pulled or damaged during the up-and-down movement of the cover plate 3, ensuring the continuity and reliability of liquid delivery.

[0024] The operator smoothly places the ferromagnetic workpiece to be tested into the mounting slot 11 inside the frame 1, starts the first cylinder 2, the piston rod extends, and drives the cover plate 3 to move downward until it completely covers the top of the mounting slot 11, forming a relatively closed testing space. This effectively limits the splashing range of the magnetic suspension during subsequent spraying and magnetization. The magnetic suspension is delivered to the spray pipe 4 through the hose 5 and evenly sprayed onto the surface of the workpiece through the nozzle, so that the surface of the workpiece is fully wetted and covered with a layer of magnetic powder suspension. At the same time or shortly after spraying, the magnetization coil of the equipment applies a magnetic field to the workpiece to magnetize it. If there are defects such as cracks on the surface of the workpiece, a leakage magnetic field will be generated at the defect, attracting the surrounding magnetic powder and forming a clearly visible magnetic mark.

[0025] like Figure 2 and Figure 3 As shown, a baffle 14 is fixedly installed in the mounting groove 11, and an inclined plate 15 is fixedly installed between the baffle 14 and the inner side wall of the mounting groove 11. A grid 16 is provided on the inclined plate 15.

[0026] Furthermore, a slot 141 is provided on the baffle 14, and a storage box 6 is placed in the mounting slot 11. The storage box 6 is located below the baffle 14, and the flexible hose 5 is connected to the storage box 6.

[0027] When the cover plate 3 is lowered and closed for spraying, some of the magnetic suspension liquid may splash onto the area of ​​the inclined plate 15. Due to the presence of the grid 16, the liquid is effectively dispersed and flows along the inclined surface to the bottom of the mounting groove 11. It then flows into the storage box 6 through the groove opening 141. The magnetic suspension liquid used for spraying is then supplied by the storage box 6 placed inside the mounting groove 11 and delivered to the spray pipe 4 through the hose 5, thus realizing a compact and integrated liquid supply system.

[0028] like Figure 2 As shown, a second cylinder 7 is fixedly installed on the bottom surface of the mounting groove 11. The movable end of the second cylinder 7 is fixed to the grille 16. Furthermore, a sealing strip 151 is installed between the second cylinder 7 and the inclined plate 15.

[0029] By controlling the second cylinder 7 to be in a retracted state, the grid 16 is lowered to the bottom, so that the workpiece to be inspected can be easily placed into the mounting slot 11 for magnetic flaw detection. When the workpiece needs to be removed, the second cylinder 7 extends, raising the grid 16 to the appropriate position to expose the workpiece for easy removal and to prepare for the inspection process of the next workpiece.

[0030] like Figure 4 As shown, a slide rail 17 is fixedly installed on the frame 1, a support frame 8 is slidably installed on the slide rail 17, and an ultraviolet lamp 9 and an industrial camera 10 are installed on the support frame 8.

[0031] After completing the steps of workpiece clamping, cover plate 3 closing, and spray magnetization, the observation and inspection stage begins. The drive mechanism on slide rail 17 is activated, which drives support frame 8 to move at a constant speed along the length of the workpiece. During the movement, ultraviolet lamp 9 continuously irradiates the surface of the workpiece, exciting the fluorescent magnetic powder to emit light. At the same time, industrial camera 10 captures high-definition images in real time to capture the shape of magnetic marks. The acquired images are processed by software algorithms for enhancement, noise reduction, edge detection, etc., to automatically identify abnormal magnetic marks and mark the defect location and evaluate the level, thus realizing intelligent defect judgment.

[0032] The drive mechanism can be any one of synchronous belt, ball screw drive mechanism or third cylinder.

[0033] Working principle: The operator smoothly places the ferromagnetic workpiece to be tested into the mounting slot 11 inside the frame 1, starts the first cylinder 2, extends the piston rod, and drives the cover plate 3 downward until it completely covers the top of the mounting slot 11, forming a relatively closed testing space. This effectively limits the splashing range of the magnetic suspension during subsequent spraying and magnetization. The magnetic suspension is delivered to the spray pipe 4 through the hose 5 and evenly sprayed onto the workpiece surface through the nozzle, so that the workpiece surface is fully wetted and covered with a layer of magnetic powder suspension. The second cylinder 7 extends, raising the grid 16 to the appropriate position to expose the workpiece. The drive mechanism on the slide rail 17 is started, driving the support frame 8 to move at a constant speed along the length of the workpiece. During the movement, the ultraviolet lamp 9 continuously irradiates the workpiece surface, exciting the fluorescent magnetic powder to emit light; at the same time, the industrial camera 10 captures high-definition images in real time to capture the magnetic trace morphology.

[0034] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A magnetic particle flaw detector with a protective structure, comprising a frame (1), characterized in that, The frame (1) has an installation slot (11) inside, and the workpiece is placed in the installation slot (11). Support columns (12) are fixedly installed at the four corners of the frame (1). A top plate (13) is installed on the support columns (12). A first cylinder (2) is fixedly installed on the top plate (13). The output end of the first cylinder (2) passes through the top plate (13) and a cover plate (3) is fixedly installed. A spray pipe (4) is installed in the cover plate (3). A hose (5) is connected between the spray pipe (4) and the installation slot (11).

2. A magnetic particle flaw detector with a protective structure according to claim 1, characterized in that, A baffle (14) is fixedly installed in the mounting groove (11), and an inclined plate (15) is fixedly installed between the baffle (14) and the inner sidewall of the mounting groove (11). A grid (16) is provided on the inclined plate (15).

3. A magnetic particle flaw detector with a protective structure according to claim 2, characterized in that, The baffle (14) has a slot (141) and a storage box (6) is placed in the mounting slot (11). The storage box (6) is located below the baffle (14) and the hose (5) is connected to the storage box (6).

4. A magnetic particle flaw detector with a protective structure according to claim 2, characterized in that, The bottom surface of the mounting groove (11) is fixedly installed with a second cylinder (7), and the movable end of the second cylinder (7) is fixed to the grille (16).

5. A magnetic particle flaw detector with a protective structure according to claim 4, characterized in that, A sealing strip (151) is installed between the second cylinder (7) and the inclined plate (15).

6. A magnetic particle flaw detector with a protective structure according to claim 1, characterized in that, A slide rail (17) is fixedly installed on the frame (1), and a support frame (8) is slidably installed on the slide rail (17). An ultraviolet lamp (9) and an industrial camera (10) are installed on the support frame (8).

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