A long strip-shaped ferromagnetic member magnetizing device

Abstract

A kind of long strip ferromagnetic component magnetizing device, including left shell and right shell being all half cylinder and being buckled to each other, left shell and right shell are hingedly connected in the same direction side, and are detachably connected in the same direction other side;Left shell and right shell all have half cylindrical mounting cavity, half cylindrical magnetic tile support plate and half cylindrical magnetizing assembly are arranged in mounting cavity, magnetic tile support plate is made of ferromagnetic material and is located the outside in mounting cavity, magnetizing assembly is adsorbed to the inside of magnetic tile support plate, magnetizing assembly includes first permanent magnet tile, second permanent magnet tile and third permanent magnet tile, the magnetic pole of first permanent magnet tile is located at its longitudinal direction both ends, the magnetic pole of second permanent magnet tile is located at its radial direction both sides, the magnetic pole of third permanent magnet tile is inclined, and first permanent magnet tile, second permanent magnet tile and third permanent magnet tile are mutually adsorbed.The utility model is used to obtain higher precision and better excitation planning effect under same body mass.

Description

Technical Field

[0001] This utility model relates to the field of non-destructive testing technology for elongated ferromagnetic components, specifically a magnetization device for elongated ferromagnetic components. Background Technology

[0002] In electromagnetic nondestructive testing of elongated ferromagnetic components (such as steel wire ropes), a magnetization device is typically used to excite the component first, followed by detection using a magnetic induction sensor. The results are then used to determine if damage exists. Generally, the magnetic fields on the surface and inside of elongated ferromagnetic components are randomly distributed. When a magnetic source re-excites and reprograms the magnetic field, the surface and internal magnetic fields will align according to a certain pattern. For uniformly intact elongated ferromagnetic components, the magnetic field is uniformly distributed. However, for elongated ferromagnetic components with defects such as fractures, corrosion, or wear, the magnetic field will exhibit some regular changes. For example, magnetic poles will be generated at fracture points; while at areas with corrosion or wear defects, the regular, uniform distribution on the surface and inside of the component will weaken systematically depending on the degree of damage. This results in poor excitation effect of the magnetizing device on long strip-shaped ferromagnetic components, which further leads to low detection accuracy and thus causes large errors in the detection results. Utility Model Content

[0003] The present invention aims to provide a magnetization device for a long strip-shaped ferromagnetic component, so as to achieve higher precision and better excitation planning effect under the same size.

[0004] To solve the above technical problems, the specific solution adopted by this utility model is as follows: a magnetization device for a long strip-shaped ferromagnetic component, comprising a left shell and a right shell, both of which are semi-cylindrical and interlocked with each other. The left shell and the right shell are hinged on one side in the same direction and detachably connected on the other side in the same direction. Both the left shell and the right shell have a semi-cylindrical mounting cavity. The mounting cavity is provided with a semi-cylindrical magnetic tile support plate and a semi-cylindrical magnetization component. The magnetic tile support plate is made of ferromagnetic material and is located on the outside of the mounting cavity. The magnetization component is attracted to the inside of the magnetic tile support plate. The magnetization component includes a first permanent magnet tile located in the middle, two second permanent magnet tiles located on the outside, and two third permanent magnet tiles located between the first permanent magnet tile and the second permanent magnet tiles. The first permanent magnet tile, the second permanent magnet tile, and the third permanent magnet tile are all semi-annular. The magnetic poles of the first permanent magnet tile are located at both ends in its longitudinal direction, the magnetic poles of the second permanent magnet tile are located on both sides in its radial direction, and the magnetic poles of the third permanent magnet tile are inclined. The first permanent magnet tile, the second permanent magnet tile, and the third permanent magnet tile are attracted to each other.

[0005] Preferably, the ends of the mounting cavities of both the left and right housings are open, and end caps for sealing are provided at the open ends.

[0006] Preferably, the end cap is fixedly connected to the corresponding left or right housing by screws.

[0007] Preferably, the openings of the left and right housings are provided with positioning protrusions, and the end caps are provided with corresponding positioning grooves for the positioning protrusions to be inserted and engaged.

[0008] Preferably, the left and right housings are connected by a hinge.

[0009] Preferably, the left and right housings are detachably connected by a snap fastener.

[0010] Preferably, a safety rope is attached to the buckle.

[0011] Preferably, the first permanent magnet tile, the second permanent magnet tile, and the third permanent magnet tile are neodymium iron boron (N-series) magnets.

[0012] This invention employs a special arrangement of magnet units that can converge magnetic field lines on one side of the magnet, enhancing the magnetic field strength on that side, while weakening the magnetic field lines on the other side, thereby obtaining a more ideal unilateral magnetic field. This design allows the magnetizing device of the same size to have a magnetic field strength on the stronger side surface that is approximately 1.4 times that of conventional magnetizing devices. Furthermore, the magnetic field distribution of the magnetizing device is more uniform, which helps to obtain high-resolution magnetization information and is suitable for environments requiring high-precision magnetic fields.

[0013] Furthermore, due to the strong repulsive force between permanent magnet tiles, they are prone to collision damage during the assembly of long, strip-shaped ferromagnetic excitation devices, making assembly difficult. In contrast, the permanent magnet tiles in this application are arranged by mutual attraction, enabling modular production and assembly, simplifying the assembly process. Moreover, a stronger magnetic field is achieved with fewer permanent magnets, resulting in lower production costs. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0016] Figure 3 This is a cross-sectional view of the left shell portion of this utility model.

[0017] The markings in the diagram are: 1. Left shell, 2. Hinge, 3. Right shell, 4. End cap, 5. Buckle, 6. Positioning protrusion, 7. Positioning groove, 8. Third permanent magnet tile, 9. Second permanent magnet tile, 10. First permanent magnet tile, 11. Magnet tile support plate. Detailed Implementation

[0018] like Figure 1 and Figure 2 As shown, the magnetizing device for a long strip-shaped ferromagnetic component of this utility model mainly includes a semi-cylindrical left shell 1 and a right shell 3. The concave surfaces of the left shell 1 and the right shell 3 face each other and enclose to form a cylindrical magnetizing device body. The tops of the left shell 1 and the right shell 3 are hinged together by two hinges 2, allowing the left shell 1 and the right shell 3 to rotate relative to each other. The bottoms of the left shell 1 and the right shell 3 are openable and closable by latches 5 to allow the long strip-shaped ferromagnetic component to be energized to enter the magnetizing device.

[0019] Both the left housing 1 and the right housing 3 have semi-cylindrical mounting cavities, each containing a magnetizing assembly. These cavities work together to excite the elongated ferromagnetic component. The magnetizing assemblies in the left housing 1 and right housing 3 are identical in composition. Taking the left housing 1 as an example... Figure 3 As shown, its magnetization assembly includes a first permanent magnet 10 located in the center, two third permanent magnets 8 located on both sides of the first permanent magnet 10, and two second permanent magnets 9 located on the outer sides of the third permanent magnets 8. The first permanent magnet 10, second permanent magnets 9, and third permanent magnets 8 are all semi-circular and are neodymium iron boron (N-series) magnets. The magnetic poles of the first permanent magnet 10 are located at both ends in its longitudinal direction; the magnetic poles of the second permanent magnets 9 are located on both sides in their radial direction; and the magnetic poles of the third permanent magnets 8 are located as shown in the diagram. Figure 3 The tilted state shown allows the first permanent magnet tile 10, the second permanent magnet tile 9, and the third permanent magnet tile 8 to be arranged in a mutually attractive manner, enabling modular production and assembly, and simplifying assembly.

[0020] In addition, a semi-cylindrical magnetic tile support plate 11 is provided on the outside of the magnetization component in the aforementioned mounting cavity. The magnetic tile support plate 11 is made of ferromagnetic material. During the process of transferring the magnetization component into the mounting cavity, the magnetic tile support plate 11 can make the first permanent magnet tile 10, the second permanent magnet tile 9, and the third permanent magnet tile 8 attract each other without the need for secondary fixing, thus saving labor costs.

[0021] To facilitate the installation of the magnetization assembly, the front ends of both the left housing 1 and the right housing 3 of this invention are open, allowing personnel to push the magnetic tile support plate 11 and the magnetization assembly into the installation cavity. The open ends are sealed with screws using semi-annular end caps 4. For easy positioning and fixing, positioning protrusions 6 are provided at the open ends of both the left housing 1 and the right housing 3, while positioning grooves 7 are provided inside the corresponding end caps 4, allowing the positioning protrusions 6 to be inserted for positioning.

[0022] In use, this invention first opens the latch 5, allowing the left shell 1 and right shell 3 to open under the influence of magnetic repulsion and gravity. The elongated ferromagnetic component is then passed through the semi-cylindrical axis of the left shell. The left shell 1 and right shell 3 are then closed, positioning the elongated ferromagnetic component at the center of the cylindrical axis of the magnetizing device. Non-concentric placement is also permissible. The elongated ferromagnetic component is then moved at a uniform speed along the axis of the magnetizing device. This completes the planning of the magnetic field for the wire rope or cable. When magnetizing the elongated ferromagnetic component, it is required to magnetize it in the same direction, i.e., along the N-pole direction.

[0023] Furthermore, in this embodiment, a safety rope is also connected to the aforementioned buckle 5. One end of the safety rope is connected to the buckle body of the buckle 5, and the other end is connected to the nearby equipment base structure. In the event of an accident during the magnetization operation of this magnetization device on a long strip of ferromagnetic components, such as when the magnetization device and the magnetized long strip of ferromagnetic components are relatively displaced, or when the device is jammed by foreign objects on the long strip of ferromagnetic components and is carried away from the safe installation position, personnel can forcibly open the buckle 5 using the safety rope. This eliminates the need for personnel to manually remove the magnetization device from the target, ensuring operational safety.

Claims

1. A magnetization device for a long strip-shaped ferromagnetic component, characterized in that: It includes a left shell (1) and a right shell (3), both semi-cylindrical and interlocked. The left shell (1) and the right shell (3) are hinged on one side in the same direction and detachably connected on the other side in the same direction. Both the left shell (1) and the right shell (3) have a semi-cylindrical mounting cavity. The mounting cavity is provided with a semi-cylindrical magnetic tile support plate (11) and a semi-cylindrical magnetizing component. The magnetic tile support plate (11) is made of ferromagnetic material and is located on the outside of the mounting cavity. The magnetizing component is attracted to the inside of the magnetic tile support plate (11). The magnetizing component includes a first permanent magnet tile located in the middle. 10) Two second permanent magnet tiles (9) located on the outside and two third permanent magnet tiles (8) located between the first permanent magnet tile (10) and the second permanent magnet tile (9). The first permanent magnet tile (10), the second permanent magnet tile (9) and the third permanent magnet tile (8) are all semi-circular. The magnetic poles of the first permanent magnet tile (10) are located at both ends in its longitudinal direction, the magnetic poles of the second permanent magnet tile (9) are located on both sides in its radial direction, and the magnetic poles of the third permanent magnet tile (8) are inclined. The first permanent magnet tile (10), the second permanent magnet tile (9) and the third permanent magnet tile (8) attract each other.

2. The magnetization device for a long strip-shaped ferromagnetic component as described in claim 1, characterized in that: The mounting cavities of the left housing (1) and the right housing (3) are both open at the ends, and end caps (4) for sealing are provided at the open ends.

3. The magnetization device for a long strip-shaped ferromagnetic component as described in claim 2, characterized in that: The end cap (4) is fixedly connected to the corresponding left housing (1) or right housing (3) by screws.

4. The magnetization device for a long strip-shaped ferromagnetic component as described in claim 2, characterized in that: The left housing (1) and the right housing (3) are provided with positioning protrusions (6) at their openings, and the end cap (4) is provided with positioning grooves (7) for the positioning protrusions (6) to be inserted and fitted.

5. The magnetization device for a long strip-shaped ferromagnetic component as described in claim 1, characterized in that: The left shell (1) and the right shell (3) are hinged together by a hinge (2).

6. The magnetization device for a long strip-shaped ferromagnetic component as described in claim 1, characterized in that: The left housing (1) and the right housing (3) are detachably connected by a buckle (5).

7. The magnetization device for a long strip-shaped ferromagnetic component as described in claim 6, characterized in that: A safety rope is attached to the buckle (5).

8. The magnetization device for a long strip-shaped ferromagnetic component as described in claim 1, characterized in that: The first permanent magnet tile (10), the second permanent magnet tile (9), and the third permanent magnet tile (8) are neodymium iron boron (N-series) magnets.

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