Novel powder magnetic flaw detector for tubular shaft workpieces

Abstract

The utility model discloses a novel magnetic powder flaw detector for tubular shaft type workpieces, which relates to the technical field of magnetic powder flaw detection and comprises a magnetic powder detector body, protective covers and a plurality of support rods, the protective covers are connected to two sides above the magnetic powder detector body, the protective covers are foldable and telescopic, one end of each protective cover is fixed on the upper side of the magnetic powder detector body, and the other end of each protective cover is fixed on the support rods. One end of each protective cover is in sliding connection with the upper side of the powder magnetic machine body through a connecting block, the other end of each protective cover is in sliding connection with the upper side of the powder magnetic machine body through a connecting block, a plurality of supporting rods are evenly connected to the inner sides of the protective covers, the supporting rods are arranged in an arc shape, and the upper side of the powder magnetic machine body is completely wrapped after the two protective covers are in butt joint. The upper portion of the powder magnetic machine body is completely wrapped by the two protective covers, the effect of preventing spraying splashing can be achieved, after spraying magnetizing is completed, observation is conducted after the protective covers are opened, and damage of exposed magnetic powder to the human body can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of powder magnetic flaw detection technology, and in particular to a novel powder magnetic flaw detector for tube shaft workpieces. Background Technology

[0002] Magnetic particle testing utilizes the fact that when ferromagnetic materials are magnetized, the discontinuities cause local distortion of the magnetic field lines on and near the workpiece surface, generating a leakage magnetic field (i.e., the magnetic field formed when magnetic induction lines leave and enter the surface). This magnetic field attracts the magnetic powder applied to the workpiece surface, forming magnetic marks that are visible to the naked eye under suitable lighting, thus revealing the location, shape, and size of the discontinuities.

[0003] Magnetic particle testing can detect defects such as cracks, hairline cracks, white spots, folds, and inclusions in ferromagnetic materials. It has high detection sensitivity and can intuitively display the location, shape, size, and severity of defects. It also has good repeatability in defect inspection.

[0004] In current powder magnetic flaw detectors, the workpiece, clamping device, and other components are completely exposed during the spray magnetization process. This not only easily causes splashing and false readings, but also poses a significant risk to human health due to the exposure. Therefore, a new type of powder magnetic flaw detector that can prevent splashing and has good safety performance is needed to solve the current problems. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a novel powder magnetic flaw detector for tubular and shaft-type workpieces. Two protective covers completely enclose the top of the powder magnetic detector body, which can prevent spray splashing. After the spraying and magnetization are completed, the protective covers can be opened for observation, which can effectively reduce the harm of exposed magnetic powder to the human body.

[0006] The technical solution adopted to solve the above-mentioned technical problems is: a novel powder magnetic flaw detector for tube and shaft workpieces, including a powder magnetic detector body, a protective cover, and multiple support rods. The protective cover is connected to both sides of the upper part of the powder magnetic detector body. The protective cover is foldable and retractable. One end of the protective cover is fixed to the upper side of the powder magnetic detector body, and the other end of the protective cover is slidably connected to the upper side of the powder magnetic detector body through a connecting block. Multiple support rods are evenly connected to the inner side of the protective cover. The support rods are arc-shaped. After two protective covers are joined together, they completely cover the upper side of the powder magnetic detector body.

[0007] Furthermore, it also includes a first bidirectional lead screw, a first motor, and a first guide rod. The first bidirectional lead screw is rotatably connected to one side of the powder magnet machine body, and the first bidirectional lead screw passes through the connecting block on that side. The first bidirectional lead screw is threadedly engaged with the connecting block. The first motor is connected to the side wall of the powder magnet machine body, and the output shaft of the first motor is fixedly connected to the first bidirectional lead screw. The first guide rod is fixedly connected to the other side of the powder magnet machine body, and the first guide rod passes through the connecting block on that side. The connecting block on that side is slidably connected to the first guide rod.

[0008] Furthermore, it also includes two second bidirectional lead screws, a fixed block, a moving block, a second guide rod, a clamping motor, and two second motors. The two second bidirectional lead screws are rotatably connected to the body of the powder magnetizer. The two second bidirectional lead screws are symmetrically arranged. A fixed block is fixedly connected to the middle of each second bidirectional lead screw. Moving blocks are threadedly sleeved at both ends of each second bidirectional lead screw. Both the moving blocks and the fixed blocks are set in a "V" shape. A second guide rod is provided on both sides of each second bidirectional lead screw. The second guide rod is fixedly connected to the inner side of the powder magnetizer body. The second guide rod passes through the corresponding moving block and the fixed block. The moving block is slidably connected to the second guide rod. The fixed block is slidably connected to the second guide rod. Clamping electrodes are threadedly sleeved at both ends of each second bidirectional lead screw. The two second motors correspond one-to-one with the second bidirectional lead screws. The second motors are connected to the side wall of the powder magnetizer body. The output shaft of the second motor is fixedly connected to the corresponding second bidirectional lead screw.

[0009] Furthermore, it also includes multiple spray pipes, which are provided on both sides of the inside of the powder magnet machine body, and the spray pipes on both sides are arranged crosswise.

[0010] Furthermore, it also includes an ultraviolet lamp, which is connected to the center position above the powder magnet machine body and is located inside the protective cover.

[0011] The beneficial effects of this utility model are as follows: By setting two protective covers on both sides above the powder magnetizer body, when placing the workpiece to be tested, the protective covers on both sides are pushed to the upper sides of the powder magnetizer body and are in an open state. When spraying magnetization, the protective covers on both sides are pushed to the docking position. The two protective covers completely cover the upper part of the powder magnetizer body, which can prevent spray splashing. After the spraying magnetization is completed, the protective covers are opened for observation, which can effectively reduce the harm of exposed magnetic powder to the human body. Attached Figure Description

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2This is a schematic diagram showing the position of the support rod of this utility model.

[0014] Figure 3 This is a schematic diagram showing the position of the fixing block of this utility model.

[0015] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle.

[0016] Reference numerals in the attached drawings: 1. Powder magnetizer body; 2. Protective cover; 3. Connecting block; 4. Support rod; 5. First bidirectional lead screw; 6. First motor; 7. First guide rod; 8. Second bidirectional lead screw; 9. Fixing block; 10. Moving block; 11. Second guide rod; 12. Clamping electrode; 13. Second motor; 14. Spray pipe; 15. Ultraviolet lamp. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] like Figures 1-4 As shown, this embodiment provides a novel powder magnetic flaw detector for tube and shaft workpieces, including a powder magnetic detector body 1, a protective cover 2, and multiple support rods 4. The protective cover 2 is connected to both sides of the upper part of the powder magnetic detector body 1. The protective cover 2 is foldable and retractable. One end of the protective cover 2 is fixed to the upper side of the powder magnetic detector body 1, and the other end of the protective cover 2 is slidably connected to the upper side of the powder magnetic detector body 1 through a connecting block 3. Multiple support rods 4 are evenly connected to the inner side of the protective cover 2. The support rods 4 are arc-shaped. After two protective covers 2 are joined together, they completely cover the upper side of the powder magnetic detector body 1.

[0019] This invention features two protective covers 2 on both sides of the upper part of the powder magnetizer body 1. When placing the workpiece to be tested, the protective covers 2 on both sides are pushed to the upper sides of the powder magnetizer body 1 and opened. During spray magnetization, the protective covers 2 on both sides are pushed to the docking position. The two protective covers 2 completely cover the upper part of the powder magnetizer body 1, which can prevent spray splashing. After the spray magnetization is completed, the protective covers 2 are opened for observation, which can effectively reduce the harm of exposed magnetic powder to the human body.

[0020] Specifically, it also includes a first bidirectional lead screw 5, a first motor 6, and a first guide rod 7. The first bidirectional lead screw 5 is rotatably connected to one side of the powder magnet machine body 1 above. The first bidirectional lead screw 5 passes through the connecting block 3 on this side. The first bidirectional lead screw 5 and the connecting block 3 are threaded together. The first motor 6 is connected to the side wall of the powder magnet machine body 1. The output shaft of the first motor 6 is fixedly connected to the first bidirectional lead screw 5. The first guide rod 7 is fixedly connected to the other side of the powder magnet machine body 1 above. The first guide rod 7 passes through the connecting block 3 on this side. The connecting block 3 on this side is slidably connected to the first guide rod 7.

[0021] In the above embodiments, the first motor 6 drives the first bidirectional lead screw 5 to rotate, and through the cooperation of the first guide rod 7, the two protective covers 2 move synchronously in opposite directions, realizing the opening and closing operation.

[0022] Specifically, it also includes two second bidirectional lead screws 8, a fixed block 9, a moving block 10, a second guide rod 11, a clamping motor, and two second motors 13. The two second bidirectional lead screws 8 are rotatably connected inside the powder magnet machine body 1. The two second bidirectional lead screws 8 are symmetrically arranged. A fixed block 9 is fixedly connected to the middle of each second bidirectional lead screw 8. Moving blocks 10 are threadedly sleeved at both ends of each second bidirectional lead screw 8. Both moving blocks 10 and fixed blocks 9 are set in a "V" shape. Second guide rods 11 are provided on both sides of each second bidirectional lead screw 8. The second guide rods 11 are fixedly connected to the inner side of the powder magnet machine body 1. The second guide rods 11 pass through the corresponding moving blocks 10 and fixed blocks 9. Moving blocks 10 are slidably connected to the second guide rods 11. Fixed blocks 9 are slidably connected to the second guide rods 11. Clamping electrodes 12 are threadedly sleeved at both ends of each second bidirectional lead screw 8. The two second motors 13 correspond one-to-one with the second bidirectional lead screws 8. The second motors 13 are connected to the side wall of the powder magnet machine body 1. The output shaft of the second motors 13 is fixedly connected to the corresponding second bidirectional lead screw 8.

[0023] In the above embodiments, when placing tubular or shaft-like workpieces, the workpieces are placed on the fixed block 9 in the middle, and the corresponding second motor 13 drives the corresponding second bidirectional lead screw 8 to rotate, so that the moving blocks 10 on both sides move closer to each other or further away from each other to accommodate tubular or shaft-like workpieces of different lengths. The fixed block 9 and the moving block 10 are set in a "V" shape, which is beneficial for placing workpieces with larger lengths. In addition, both the fixed block 9 and the moving block 10 are made of black high-strength nylon, which can reduce the intensity of white light reflection at the inspection site during flaw detection, ensure that the white light illuminance requirements during flaw detection are met, and improve the accuracy of the detection.

[0024] Specifically, it also includes multiple spray pipes 14. Multiple spray pipes 14 are provided on both sides of the inside of the powder magnet machine body 1, and the spray pipes 14 on both sides are arranged crosswise.

[0025] In the above embodiments, multiple spray pipes 14 are provided, which can effectively improve the uniformity of spraying, and the cross-arranged spray pipes 14 further improve the uniformity of spraying.

[0026] Specifically, it also includes an ultraviolet lamp 15, which is connected to the center position above the powder magnet machine body 1 and is located inside the protective cover 2.

[0027] In the above embodiments, the ultraviolet lamp 15 further facilitates the operator's observation and makes it easier to observe magnetic traces.

[0028] The powder magnetizer body 1 contains necessary components and mechanisms such as a liquid collection tank, a liquid storage tank, a spray pump, a stirring pump, pipes, an electrode box, and a magnetizing coil. These are clearly known prior art and will not be described in detail here.

[0029] The working principle of this utility model is as follows: This device can detect two tube-shaped workpieces at once. The workpiece is placed in the "V"-shaped area of ​​the fixed block 9 and the moving block 10. According to the length of the workpiece, the distance between the two moving blocks 10 and the distance between the two clamping motors are adjusted. The corresponding second motor 13 is run, which drives the corresponding second bidirectional lead screw 8 to rotate, so that the distance between the clamping electrodes 12 on both sides and the moving blocks 10 on both sides changes. After the distance is adjusted, the clamping electrodes 12 on both sides clamp the workpiece. Then, the first motor 6 is run, which drives the first bidirectional lead screw 5 to rotate. The rotation of the first bidirectional lead screw 5 drives the corresponding connecting block 3, so that the protective covers 2 on both sides come closer to each other and dock together, so as to completely wrap the upper side of the powder magnetizer body 1. Then, spray magnetization is performed, and the magnetization is discharged through the spray pipe 14. After the spray magnetization is completed, the clamping electrodes 12 are released, the first motor 6 is run to open the protective cover 2, and the ultraviolet lamp 15 is turned on to observe the magnetic trace.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A novel powder magnetic flaw detector for tubular and shaft-type workpieces, comprising a powder magnetic flaw detector body (1), characterized in that, Also includes: Protective cover (2): The protective cover (2) is connected to both sides of the upper part of the powder magnet machine body (1). The protective cover (2) is foldable and retractable. One end of the protective cover (2) is fixed to the upper side of the powder magnet machine body (1), and the other end of the protective cover (2) is slidably connected to the upper side of the powder magnet machine body (1) through the connecting block (3); Multiple support rods (4) are evenly connected to the inner side of the protective cover (2), and the support rods (4) are arranged in an arc shape; After the two protective covers (2) are joined together, they completely cover the upper side of the powder magnet machine body (1).

2. The novel powder magnetic flaw detector for tubular and shaft-type workpieces according to claim 1, characterized in that, Also includes: The first bidirectional lead screw (5) is rotatably connected to one side above the powder magnet body (1). The first bidirectional lead screw (5) passes through the connecting block (3) on that side. The first bidirectional lead screw (5) is threadedly engaged with the connecting block (3). The first motor (6) is connected to the side wall of the powder magnet machine body (1), and the output shaft of the first motor (6) is fixedly connected to the first bidirectional lead screw (5); The first guide rod (7) is fixedly connected to the other side above the powder magnet body (1). The first guide rod (7) passes through the connecting block (3) on this side, and the connecting block (3) on this side is slidably connected to the first guide rod (7).

3. The novel powder magnetic flaw detector for tubular and shaft-type workpieces according to claim 1, characterized in that, Also includes: Two second bidirectional lead screws (8) are rotatably connected inside the powder magnet machine body (1), and the two second bidirectional lead screws (8) are symmetrically arranged; Fixed block (9), each of the second bidirectional lead screws (8) is fixedly connected to the middle of the fixed block (9); The movable block (10) is threaded onto both ends of each of the second bidirectional lead screws (8); Both the moving block (10) and the fixed block (9) are configured as "V" shapes; The second guide rod (11) is provided on both sides of each second bidirectional screw (8). The second guide rod (11) is fixedly connected to the inner side of the powder magnet machine body (1). The second guide rod (11) passes through the corresponding moving block (10) and the fixed block (9). The moving block (10) is slidably connected to the second guide rod (11), and the fixed block (9) is slidably connected to the second guide rod (11). Clamping electrode (12), each of the two ends of the second bidirectional lead screw (8) is threaded with a clamping electrode (12); Two second motors (13) correspond one-to-one with the second bidirectional lead screw (8). The second motors (13) are connected to the side wall of the powder magnet body (1). The output shaft of the second motors (13) is fixedly connected to the corresponding second bidirectional lead screw (8).

4. The novel powder magnetic flaw detector for tubular and shaft-type workpieces according to claim 1, characterized in that, Also includes: Multiple spray pipes (14) are provided on both sides of the inside of the powder magnet machine body (1). The spray pipes (14) on both sides are arranged in a cross pattern.

5. A novel powder magnetic flaw detector for tubular and shaft-type workpieces according to claim 1, characterized in that, Also includes: An ultraviolet lamp (15) is connected to the center position above the powder magnet machine body (1), and the ultraviolet lamp (15) is located inside the protective cover (2).

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