Detection assembly for alternating current magnetic flux leakage

Abstract

The utility model relates to the technical field of detection components, and discloses a detection component for alternating current magnetic flux leakage, which comprises a probe frame adapted to bear a bar and arranged on the surface of the bar through a sliding shaft to perform detection work; the two groups of brackets are L-shaped and are arranged on the two sides of the probe frame in opposite directions; the two groups of magnetic yokes are U-shaped and are mounted on the two groups of brackets in a height symmetry manner; the magnetizing coil surrounds the two ends of the magnet yoke; a high-intensity magnetic field is generated through cooperation of the magnetizing coil and the magnet yoke, magnetic lines of force appear in the bar, and magnetic flux leakage detection work is conducted through the probe frame. Through the position arrangement among the magnet yoke, the magnetizing coil and the probe frame, a strong magnetic field is generated during working, so that magnetic lines are formed in the bar, and then the probe frame moves on the surface of the bar to detect magnetic flux leakage.

Description

Technical Field

[0001] This utility model relates to the field of detection component technology, specifically to a detection component for AC leakage magnetic flux. Background Technology

[0002] In the fields of industrial manufacturing and quality inspection, non-destructive testing technology for metal bars is crucial, especially in industries such as petroleum, aviation, rail transportation, and high-end equipment manufacturing. Defects such as micro-cracks, inclusions, and material inhomogeneity on the surface of bars can affect the performance and safety of the final product. AC magnetic flux leakage testing, as an efficient non-destructive testing method, is widely used in the detection of defects in bars.

[0003] Traditional magnetic flux leakage detection technology mainly uses DC magnetization. Although this method can detect surface and subsurface defects well, it has low sensitivity to small defects and is easily affected by residual magnetization. In contrast, AC magnetic flux leakage detection generates an alternating magnetic field on the yoke through alternating current, which induces alternating magnetic flux on the surface of the bar, thereby improving the detection capability of small defects and avoiding the hysteresis and residual magnetism problems caused by DC magnetization.

[0004] In view of the above, this application proposes an AC leakage magnetic flux detection component to solve the above problems. By adopting a U-shaped magnetic yoke and winding magnetizing coils at both ends of the magnetic yoke, the alternating magnetic field can be stably applied to the surface of the bar. Furthermore, the component facilitates the subsequent maintenance and cleaning work by allowing for flexible disassembly of the workpiece. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an AC leakage magnetic flux detection component, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An AC leakage flux detection component includes,

[0008] The probe holder is adapted to receive the bar material and performs detection work on the surface of the bar material through a sliding shaft.

[0009] There are two sets of brackets, both L-shaped, facing opposite directions and located on both sides of the probe frame;

[0010] There are two sets of magnetic yokes, both U-shaped, which are symmetrically mounted on two sets of supports.

[0011] Magnetizing coils are wrapped around both ends of the magnetic yoke;

[0012] A strong magnetic field is generated by the combination of a magnetizing coil and a magnetic yoke, which causes magnetic lines of force to appear inside the bar. The leakage magnetic field is then detected by a probe holder.

[0013] Optionally, the probe holder includes a sliding probe and a base;

[0014] The sliding probe is used to detect magnetic leakage wires;

[0015] The base is detachably mounted on the sliding probe.

[0016] Optionally, one end of the base protrudes outward to form a limiting shaft A, which is connected to the sliding probe by bolts.

[0017] Optionally, the base is detachably connected to the sliding shaft, and a circular groove is provided in the middle of the sliding shaft.

[0018] Optionally, the bracket includes a support plate, a positioning plate, and a B-limiting shaft;

[0019] The support plate is composed of two L-shaped plates connected together.

[0020] The positioning plate is located at the middle of the connection between the two L-shaped plates;

[0021] The B-limiting shaft is detachably mounted in the middle of the support plate connection.

[0022] Optionally, the connection between the B limiting shaft and the positioning plate is adapted to the size of the magnetic yoke surrounding the magnetizing coil.

[0023] Optionally, the B-limiting shaft includes a fixing plate, a protruding plate, and positioning bolts;

[0024] The diameter of the fixing plate is adapted to the connection spacing of the two L-shaped plates.

[0025] The protruding plate is fixedly connected to the middle of the fixed plate;

[0026] The positioning bolts are installed to simultaneously penetrate the support plate and the protruding plate.

[0027] This utility model provides a detection component for AC leakage magnetic flux, which has the following advantages:

[0028] 1. By setting the positions of the magnetic yoke, magnetization coil and probe holder, a strong magnetic field is generated during operation, which causes magnetic lines of force to form inside the rod. Then the probe holder moves on the surface of the rod to detect magnetic leakage.

[0029] 2. The bracket design facilitates maintenance and cleaning of the yoke.

[0030] 3. The probe holder allows for easy assembly and disassembly of the sliding shaft, which facilitates the subsequent connection and use of different sliding shafts. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is a schematic diagram of the limiting shaft structure of this utility model;

[0033] Figure 3 This is a schematic diagram of the sliding shaft structure of this utility model.

[0034] In the diagram: 1. Probe frame; 11. Sliding probe; 12. Base; 121. A limiting shaft; 2. Rod; 21. Sliding shaft; 22. Circular groove; 3. Bracket; 31. Support plate; 32. Positioning plate; 33. B limiting shaft; 331. Fixing plate; 332. Protruding plate; 333. Positioning bolt; 4. Magnetic yoke; 5. Magnetizing coil. Detailed Implementation

[0035] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0036] In the description of this utility model, it should be understood that the terms "lateral", "longitudinal", "end", "edge", "sidewall", "upper", "lower", "upper part", "lower part", "directly above", "surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "end", "head", "tail", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of 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.

[0037] This application proposes an AC leakage magnetic flux detection component, which is as follows:

[0038] For reference Figure 1-3 This application mainly consists of a probe frame 1, a support 3 mounted on the probe frame 1, a magnetic yoke 4 mounted on the support 3, and magnetizing coils 5 mounted at both ends of the magnetic yoke 4. Through the coordinated arrangement of the above devices, the magnetizing coils 5 and the magnetic yoke 4 can generate a strong magnetic field, causing magnetic lines of force to appear inside the rod 2. The probe frame 1 is used to perform magnetic leakage detection. Furthermore, the connection between the probe frame 1 and the sliding shaft 21, as well as the assembly and disassembly of the magnetic yoke 4, have been further improved.

[0039] For reference Figure 1 The probe holder 1 is connected to the surface of the rod 2 via a sliding shaft 21 to perform detection work. The sliding shaft 21 serves to protect the probe holder 1 and also assists in the rotation and axial sliding of the probe holder 1.

[0040] Secondly, to facilitate the adaptability of the probe holder 1 to connect and cooperate with sliding shafts 21 of different sizes in different operations, the probe holder 1 is further configured as a sliding probe 11 and a base 12. The sliding probe 11 is used to detect magnetic leakage wires, and the base 12 is detachably mounted on the sliding probe 11. By changing different bases 12, it is possible to connect with sliding shafts 21 of different sizes. A circular groove 22 is opened in the middle of the sliding shaft 21, and the rod 2 is inserted into the circular groove 22 for operation. One end of the base 12 protrudes outward to form a limiting shaft A 121, which is connected to the sliding probe 11 by bolts.

[0041] It should be noted that the sliding shaft 21 is a mature existing technology, and different models and types can be used to adapt to different usage environments, so this application will not elaborate further.

[0042] For reference Figure 1-3 Two sets of brackets 3 are set on both sides of the probe frame 1. Both sets of brackets are L-shaped and set in opposite directions. When they are stationary, one set is the other set rotated 180°. Magnetic yokes 4 are set on the two sets of brackets 3. The magnetic yokes 4 are U-shaped and are symmetrically installed on the two sets of brackets 3. That is, regardless of whether the shape of the brackets 3 is symmetrical, the two sets of magnetic yokes 4 are at the same height and are symmetrically set on the brackets 3 to work.

[0043] Furthermore, magnetizing coils 5 are provided at both ends of the magnetic yoke 4. The design of the U-shaped magnetic yoke 4 can concentrate the magnetic field in its open area. The magnetizing coils 5 surround the two ends of the magnetic yoke 4 to form a closed magnetic circuit, thereby making the magnetic field more concentrated and stronger between the two arms of the U-shape. This helps to achieve a more efficient magnetization process, so that a sufficiently strong magnetic field can be generated during the detection process, thereby causing magnetic lines of force to be generated inside the bar 2. If there is a discontinuity on the surface of the workpiece, the magnetic lines of force will deviate and generate leakage magnetic field. The sliding probe 11 detects the leakage magnetic lines, and subsequently displays and reports this deviation and accurate position information through the NOVAFLUX NG detection system.

[0044] Furthermore, to facilitate subsequent maintenance and replacement of the yoke 4 and magnetizing coil 5, the bracket 3 is optimized and configured as a support plate 31, a positioning plate 32, and a B-limiting shaft 33. The support plate 31 is composed of two L-shaped plates connected together, the positioning plate 32 is located in the middle of the connection between the two L-shaped plates, and the B-limiting shaft 33 is detachably mounted in the middle of the connection between the support plate 31. The support plate 31 serves to support the yoke 4, but to better ensure the symmetrical arrangement of the two sets of yokes 4 during support, the positioning plate 32 is further provided. Thus, when installing the yoke 4, the yoke 4 can be placed in the position of the positioning plate 32, and the B-limiting shaft 33 is located on the other side of the yoke 4, clamping the yoke 4 in the middle through the B-limiting shaft 33 and the positioning plate 32.

[0045] The specific B-limiting shaft 33 is configured to include a fixed plate 331, a raised plate 332, and a positioning bolt 333. The diameter of the fixed plate 331 is adapted to the connection distance between the two L-shaped plates. The raised plate 332 is fixedly connected to the middle of the fixed plate 331. The positioning bolt 333 is set to pass through the support plate 31 and the raised plate 332 simultaneously. The fixed plate 331 and the positioning plate 32 cooperate to clamp the magnetic yoke 4. Setting the raised plate 332 in the middle of the fixed plate 331 can reduce the position of the magnetic yoke 4 from being too close to the outlet end of the support plate 31. This setting can effectively reduce the possibility of loosening. The positioning bolt 333 is used to fix the magnetic yoke 4, so that the clamping cooperation between the fixed plate 331 and the positioning plate 32 can work continuously and stably.

[0046] In this invention, the working steps of the device are as follows:

[0047] 1. First, the components are stably installed. Then, a strong magnetic field is generated by the magnetization coil 5 and the magnetic yoke 4, which causes magnetic lines of force to appear inside the rod 2.

[0048] 2. Secondly, the probe holder 1 rotates with the assistance of the sliding shaft 21 and moves axially on the surface of the bar 2. If there is a discontinuity on the surface of the workpiece, the magnetic lines of force will deviate and generate leakage magnetic field. The probe holder 1 detects the leakage magnetic field lines, and the external NOVAFLUX NG detection system displays and reports this deviation and accurate position information.

[0049] 3. Then, if the workpiece needs to be replaced with a sliding shaft 21, the probe holder 1 can be disassembled from the sliding shaft 21 and then a suitable sliding shaft 21 can be installed.

[0050] 4. Finally, when it is necessary to replace or repair the magnetizing coil 5 and the yoke 4, it can be done by disassembling and assembling the bracket 3, which facilitates maintenance and cleaning work.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A detection component for AC leakage flux, characterized in that: include, The probe holder (1) is adapted to receive the rod (2) and performs detection work on the surface of the rod (2) via the sliding shaft (21); There are two sets of brackets (3), both L-shaped, facing opposite directions on both sides of the probe bracket (1); The magnetic yoke (4) has two sets, both U-shaped, and is symmetrically mounted on the two sets of supports (3); Magnetizing coils (5) are wrapped around both ends of the magnetic yoke (4); A strong magnetic field is generated by the magnetization coil (5) and the magnetic yoke (4), which causes magnetic lines of force to appear inside the rod (2), and leakage magnetic field detection is performed by the probe holder (1).

2. The AC leakage flux detection component according to claim 1, characterized in that: The probe holder (1) includes a sliding probe (11) and a base (12); The sliding probe (11) is used to detect magnetic leakage wires; The base (12) is detachably mounted on the sliding probe (11).

3. The AC leakage flux detection component according to claim 2, characterized in that: One end of the base (12) protrudes outward to form a limiting shaft (121), which is connected to the sliding probe (11) by bolts.

4. The AC leakage flux detection component according to claim 2, characterized in that: The base (12) is detachably connected to the sliding shaft (21), and a circular groove (22) is provided in the middle of the sliding shaft (21).

5. The AC leakage flux detection component according to claim 1, characterized in that: The bracket (3) includes a support plate (31), a positioning plate (32), and a B-limiting shaft (33). The support plate (31) is composed of two L-shaped plates connected together; The positioning plate (32) is located at the middle of the connection between the two L-shaped plates; The B limiting shaft (33) is detachably mounted in the middle of the support plate (31).

6. The AC leakage flux detection component according to claim 5, characterized in that: The connection between the B limiting shaft (33) and the positioning plate (32) is adapted to the size of the magnetic yoke (4) surrounding the magnetizing coil (5).

7. The AC leakage flux detection component according to claim 5, characterized in that: The B-limiting shaft (33) includes a fixing plate (331), a protruding plate (332), and a positioning bolt (333). The diameter of the fixing plate (331) is adapted to the connection spacing of the two L-shaped plates; The protruding plate (332) is fixedly connected to the middle part of the fixed plate (331); The positioning bolt (333) is installed to simultaneously penetrate the support plate (31) and the protruding plate (332).

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