A magnetization device for nondestructive testing of long strip ferromagnetic components

Abstract

The invention belongs to the technical field of non-destructive testing of long strip ferromagnetic components, and specifically discloses a magnetization device for non-destructive testing of long strip ferromagnetic components, comprising an upper shell and a lower shell, wherein the upper shell and the lower shell are fixedly connected via an elastic stopper; a semi-annular magnetization unit is installed in both the upper shell and the lower shell via an elastic connector; the semi-annular magnetization unit comprises three arc-shaped plates, two middle partitions, and two side plates, wherein the three arc-shaped plates are sequentially attached to form a magnetic outer ring, the two side plates are fixed at both ends of the magnetic outer ring, the two middle partitions are arranged on the inner side of the magnetic outer ring, and an installation cavity is formed between the middle partitions and the side plates; a plurality of arc-shaped magnetic blocks are installed in the installation cavity, an elastic pad is provided between two adjacent arc-shaped magnetic blocks, and a magnetic cover plate is fixed at the opening of the installation cavity; the magnetization device for non-destructive testing of long strip ferromagnetic components provided by the invention has the advantages of low cost, strong magnetization performance, and easy disassembly and assembly.

Description

Technical Field

[0001] The present invention belongs to the technical field of nondestructive testing of long strip ferromagnetic components, and more specifically, relates to a magnetizing device for nondestructive testing of long strip ferromagnetic components. Background Art

[0002] Long, ferromagnetic components, such as wire ropes and rebar, are widely used in production engineering operations. Wire ropes, in particular, are key load-bearing components and are susceptible to various forms of mechanical damage during use, such as wire breakage, wear, and corrosion. These damages can reduce the safe load-bearing capacity of the wire ropes, and if not promptly replaced, serious accidents can occur. Currently, the most commonly used nondestructive testing methods, both domestically and internationally, include ultrasonic testing, radiation testing, eddy current testing, electromagnetic testing, and infrared testing. Since most wire ropes are made of high-carbon steel with excellent magnetic conductivity, electromagnetic testing is well-suited for nondestructive testing of wire ropes and has become the most widely used and established testing method.

[0003] In the electromagnetic detection method, the most important link is to effectively magnetize the wire rope. Only by effectively magnetizing the wire rope can the accuracy of the detection link be guaranteed; the Chinese utility model patent with authorization announcement number CN216145476U discloses an underwater portable wire rope magnetization device, including a fixed shell and a movable shell that cooperate with each other, the rear end of the movable shell is hinged to the fixed shell, and the front end can rotate relative to the fixed shell and is connected to the fixed shell by a collision lock, the interior of the fixed shell and the movable shell are jointly provided with a magnetization hole for the wire rope to pass through, and the magnetization hole is arranged through the two, the fixed shell and the movable shell both extend outward at both ends of the magnetization hole to form a sink, one end face of the sink is provided with a mounting hole for installing a permanent magnet column, and multiple sections of permanent magnet columns can be selectively installed inside the mounting hole, and the outer side of the sink is detachably fastened with two semicircular wear-resistant bushings for limiting the permanent magnet column, and the inner diameters of the two wear-resistant bushings are the same;

[0004] Chinese invention patent application publication number CN110632169A discloses a wire rope damage detection device, comprising a sensor housing, with magnetizing devices mounted at both ends of the sensor housing. The magnetizing devices have through-holes for the wire rope to pass through, and are permanent magnets. The permanent magnets include a first permanent magnet and a second permanent magnet, and the first and second permanent magnets are radially magnetized tile-shaped permanent magnets.

[0005] The structure of the magnetization device in the above-mentioned existing technical solutions either uses a whole tile-shaped permanent magnet, which makes the magnetization device costly; or uses multiple permanent magnet columns assembled to form a semi-annular permanent magnet structure, which is more troublesome to assemble. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a magnetization device for non-destructive testing of an elongated ferromagnetic component, which aims to solve the problems raised in the above-mentioned background technology.

[0007] The present invention is achieved in this way, and the present invention provides the following technical solutions:

[0008] A magnetization device for non-destructive testing of an elongated ferromagnetic component, comprising an upper shell and a lower shell, wherein the upper shell and the lower shell are fastened together and fixedly connected by an elastic stopper;

[0009] The upper shell and the lower shell are both detachably provided with a semi-annular magnetizing unit through elastic connectors. When the upper shell and the lower shell are assembled together, the upper and lower semi-annular magnetizing units form a cylindrical magnetizing body.

[0010] The semi-annular magnetization unit includes three arc-shaped plates, two middle partitions and two side plates. The three arc-shaped plates are sequentially attached to form a magnetic outer ring. The two side plates are fixed to the two ends of the magnetic outer ring. The two middle partitions are arranged on the inner side of the magnetic outer ring. A mounting cavity is formed between the middle partitions and the side plates.

[0011] A plurality of arc-shaped magnetic blocks are installed in the installation cavity, an elastic pad is provided between two adjacent arc-shaped magnetic blocks, and a magnetic cover plate is fixed at the opening of the installation cavity.

[0012] Furthermore, the elastic stop member includes an L-shaped plate installed on the upper shell and a stop rod installed on the lower shell. The left end of the stop rod has a slope, and the outer periphery of the stop rod is provided with a first spring. When the upper shell and the lower shell are buckled together, the stop rod can stop the L-shaped plate.

[0013] Furthermore, the openings of the upper shell and the lower shell are both provided with outwardly extending convex plates, the L-shaped plate is fixed on the lower side of the convex plate of the upper shell, the lower side of the convex plate of the lower shell is provided with a first shell, and the stop rod is installed in the first shell.

[0014] Furthermore, the stop rod is placed horizontally in the first shell, and a stop plate is provided at the left end of the stop rod. One end of the first spring abuts against the stop plate, and the other end abuts against the inner wall of the first shell. The right end of the stop rod passes through the outer side surface of the first shell, and a pull ring is provided on the right end face of the stop rod.

[0015] Furthermore, a first vertical plate is provided in the first shell, a second vertical plate is provided on the right side of the first vertical plate, the stop plate is a rectangular plate, the height of the second vertical plate is less than the height of the first vertical plate, and when the stop rod stops the L-shaped plate, the long side of the stop plate is in a horizontal state. When the upper shell and the lower shell need to be disassembled, the stop rod is pulled until the stop plate is located on the side of the second vertical plate facing away from the first vertical plate, and after the stop rod is rotated 90°, the stop plate can contact the right side of the second vertical plate.

[0016] Furthermore, the elastic connecting member includes a second shell fixed on the inner side surface of the upper shell or the lower shell, and two symmetrically arranged limit plates with one end located in the second shell, a horizontal plate is provided on the side surface opposite to each other at one end of the two limit plates located in the second shell, and a second spring is provided between the side surfaces opposite to each other at one end of the two limit plates located in the second shell.

[0017] Furthermore, the elastic pad includes two pads, and sleeves and guide columns are respectively provided on opposite sides of the two pads. The end sliding rods of the guide columns are connected to the sleeves, and a third spring is provided between the guide columns and the bottom wall of the sleeves.

[0018] Furthermore, the material of the arc-shaped magnetic block is NdFeB N series magnet; the material of the arc-shaped plate is ferromagnetic material.

[0019] Furthermore, the magnetic field intensity of the circular cavity in the cylindrical magnetized body gradually increases from the center thereof to the side wall of the magnetic cover plate from 0 mT to 650 mT.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The installation cavity of the semi-annular magnetization unit in the present invention is equipped with multiple arc-shaped magnetic blocks, which can effectively reduce costs compared with the solution of the prior art in which each installation cavity is equipped with a whole semi-annular magnetic block; compared with the solution of the prior art in which each installation cavity is equipped with multiple magnetic columns, the complexity of the installation operation is reduced, which can effectively improve the installation efficiency;

[0022] 2. The magnetic outer ring of the semi-annular magnetization unit of the present invention is composed of three arc-shaped plates. The magnetic outer ring composed of three arc-shaped plates is used as a magnetic yoke to enhance the magnetic conductivity between the arc-shaped magnetic blocks between the two mounting cavities. Therefore, even if multiple arc-shaped magnetic blocks (rather than a whole semi-annular magnetic block) are installed in the mounting cavity, the magnetization performance of the magnetization structure can be effectively enhanced.

[0023] 3. In the present invention, the upper shell and the lower shell are fixedly connected by elastic stoppers after being buckled together, and the semi-annular magnetization unit is detachably installed in the upper shell or the lower shell through the elastic connection member, so that the magnetization structure can be quickly disassembled and assembled, which effectively improves the disassembly and assembly efficiency compared with the traditional bolt fixing method;

[0024] 4. The magnetization device for nondestructive testing of long strip ferromagnetic components provided by the present invention is an important component of the electromagnetic testing method for nondestructive testing of long strip ferromagnetic components. It can effectively magnetize the long strip ferromagnetic components that need to be tested for damage, and by enhancing the magnetization performance of the magnetized structure, effectively improve the accuracy of subsequent testing links;

[0025] In summary, the magnetization device for non-destructive testing of elongated ferromagnetic components provided by the present invention has the advantages of low cost, strong magnetization performance, and easy assembly and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the present invention, the following briefly describes the drawings required for use in some embodiments of the present invention. Obviously, the drawings described below are merely illustrations of some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, or actual timing of the signals involved in the embodiments of the present invention.

[0027] Figure 1 Schematic cross-sectional view of the lower shell and the upper shell in the buckled state of the present invention;

[0028] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle;

[0029] Figure 3 for Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0030] Figure 4 A side view of the stop lever of the present invention;

[0031] Figure 5 This is a top view of the lower housing in the present invention without the magnetic cover installed;

[0032] Figure 6 for Figure 5 Schematic diagram of the middle II section;

[0033] Figure 7 for Figure 6 A partial enlarged schematic diagram of point C in the middle;

[0034] Figure 8Schematic diagram of the structure of the elastic pad in the present invention;

[0035] Figure 9 for Figure 8 Enlarged schematic diagram of the local section at point D in the middle.

[0036] The accompanying drawings are marked as follows: 1. upper shell, 2. lower shell, 3. arc-shaped plate, 4. middle partition, 5. side plate, 6. magnetic cover plate, 7. L-shaped plate, 8. stop rod, 9. first spring, 10. convex edge plate, 11. first shell, 12. stop plate, 13. pull ring, 14. first vertical plate, 15. second vertical plate, 16. second shell, 17. limit plate, 1701, block, 18. second spring, 19. through hole, 20. pad, 21. sleeve, 22. guide column, 23. third spring, 24. retaining ring, 25. convex ring part, 26. pressure plate, 27. fourth spring, 28. arc-shaped magnetic block, 30. support vertical plate, 31. horizontal plate. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] like Figure 1-6 As shown, a long strip ferromagnetic component non-destructive testing magnetization device includes an upper shell 1 and a lower shell 2. The upper shell 1 and the lower shell 2 are fixedly connected by an elastic stopper after being buckled up and down. The upper shell 1 and the lower shell 2 are both made of nylon.

[0039] The upper shell 1 and the lower shell 2 are both detachably provided with a semi-annular magnetizing unit through an elastic connector. When the upper shell 1 and the lower shell 2 are assembled together, the upper and lower semi-annular magnetizing units form a cylindrical magnetized body.

[0040] The semi-annular magnetization unit includes three arc-shaped plates 3, two middle partitions 4 and two side plates 5. The material of the arc-shaped plates 3 is ferromagnetic material. The three arc-shaped plates 3 are concentric, and the diameter of the arc-shaped plates 3 from the outer layer to the inner layer becomes smaller and smaller. The three arc-shaped plates 3 are sequentially attached to form a magnetic outer ring. The two side plates 5 are fixed at both ends of the magnetic outer ring. The two middle partitions 4 are arranged on the inner side of the magnetic outer ring, and a mounting cavity is formed between the middle partition 4 and the side plates 5. The middle partition 4 and the side plates 5 are both fan-shaped structures. The outer diameter of the side plate 5 is the same as the outer diameter of the outermost arc-shaped plate 3, the inner diameter of the side plate 5 is smaller than the inner diameter of the middle partition 4, and the outer diameter of the middle partition 4 is consistent with the inner diameter of the innermost arc-shaped plate 3.

[0041] A plurality of arc-shaped magnetic blocks 28 having the same inner and outer diameters as the middle partition plate 4 are installed in the installation cavity, and an elastic pad is provided between two adjacent arc-shaped magnetic blocks 28. A magnetic cover plate 6 made of Q235 carbon steel is fixed at the opening of the installation cavity, and the arc-shaped magnetic blocks 28 in the two installation cavities of the same semi-annular magnetization unit have opposite magnetic poles. After the two semi-annular magnetization units are assembled, the magnetic poles of the arc-shaped magnetic blocks 28 at the same end are the same. The magnetic field strength of the circular cavity in the cylindrical magnetization body gradually increases from its center to the side wall of the magnetic cover plate 6 from 0mT to 650mT.

[0042] like Figure 1 、 Figure 2 and Figure 4 As shown, the elastic stopper includes an L-shaped plate 7 mounted on the upper shell 1 and a stop rod 8 mounted on the lower shell 2. The left end of the stop rod 8 has an inclined surface. Normally, the inclined surface of the stop rod 8 faces upward. The outer periphery of the stop rod 8 is sleeved with a first spring 9. When the upper shell 1 and the lower shell 2 are buckled together, the stop rod 8 can stop the L-shaped plate 7.

[0043] Specifically, the openings of the upper shell 1 and the lower shell 2 are both provided with an outwardly extending convex plate 10, the L-shaped plate 7 is fixed to the lower side of the convex plate 10 of the upper shell 1, and the lower side of the convex plate 10 of the lower shell 2 is provided with a first shell 11, the stop rod 8 is installed in the first shell 11, and the convex plate 10 of the lower shell 2 is provided with a through hole at the corresponding position of the first shell 11, and the L-shaped plate 7 can be inserted into the first shell 11 after passing through the through hole;

[0044] Specifically, the stop rod 8 is placed horizontally in the first shell 11, and a stop plate 12 is provided at the left end of the stop rod 8. The stop plate 12 is a rectangular plate, which is welded or integrally formed or threadedly connected to the stop rod 8. One end of the first spring 9 abuts against the stop plate 12, and the other end abuts against the inner side wall of the first shell 11. The elastic force provided by the first spring 9 can drive the stop rod 8 to always have a tendency to move toward the L-shaped plate 7. The right end of the stop rod 8 passes through the outer side surface of the first shell 11, and the right end surface of the stop rod 8 is provided with a pull ring 13. When the upper shell 1 and the lower shell 2 need to be disassembled, it is only necessary to pull the stop rod 8 through the pull ring 13, so that the stop rod 8 loses its stop on the L-shaped plate 7;

[0045] Specifically, a first vertical plate 14 is provided in the first housing 11, and a second vertical plate 15 is provided on the right side of the first vertical plate 14. The height of the second vertical plate 15 is less than that of the first vertical plate 14. The first vertical plate 14 and the second vertical plate 15 are integrally formed on the bottom wall of the first housing 11. When the stop rod 8 stops the L-shaped plate 7, the long side of the stop plate 12 is in a horizontal state. At this time, under the elastic force of the first spring 9, the stop plate 12 abuts against the side of the first vertical plate 14. On, and the stop rod 8 is stopped on the L-shaped plate 7; when it is necessary to disassemble the upper shell 1 and the lower shell 2, the stop rod 8 is pulled by pulling the pull ring 13 until the stop plate 12 is located on the side of the second vertical plate 15 facing away from the first vertical plate 14, and then the stop rod 8 is rotated 90°, so that the stop plate 12 can contact the right side of the second vertical plate 15, and then the pull ring 13 is released. Since the stop plate 12 is stopped by the second vertical plate 15, the stop rod 8 will not move toward the L-shaped plate 7 due to the elastic force of the first spring 9.

[0046] like Figure 1 and Figure 3 As shown, the elastic connecting member includes a second shell 16 fixed to the inner side of the upper shell 1 or the lower shell 2, and two symmetrically arranged limit plates 17 with one end located in the second shell 16, a horizontal plate 31 is provided on the side surface of the two limit plates 17 located in the second shell 16 on the opposite side of one end, and a second spring 18 is provided between the side surfaces of the two limit plates 17 located in the second shell 16 on the opposite side of one end, and a through hole for the two limit plates 17 to pass through is opened at one end of the second shell 16 facing the arc plate 3, and the width of the through hole on the second shell 16 can ensure that after the two limit plates 17 abut against the side wall of the through hole, the upper end of the limit plate 17 can abut against the surface of the arc plate 3;

[0047] Specifically, a clamping block 1701 is provided at the upper end of the limiting plate 17, and the upper end of the clamping block 1701 is an inclined surface, and a through hole 19 is provided on the curved plate 3 for the two limiting plates 17 to pass through. When the two limiting plates 17 pass through the upper side surface of the curved plate 3, the clamping block 1701 is clamped on the side surface of the curved plate 3, and when the two limiting plates 17 are pressed against the side wall of the through hole of the second shell 16 under the elastic force of the second spring 18, the distance between the ends of the inclined surfaces of the clamping blocks 1701 of the two limiting plates 17 that are closer to each other is not greater than the diameter of the through hole 19; wherein the clamping block 1701 is provided on the opposite sides of the two limiting plates 17; during assembly, it is only necessary to press the curved plates 3 toward the upper shell 1 or the lower shell 2 one by one, and during the pressing process, the two The inclined section of the block 1701 of the limiting plate 17 first contacts the through hole 19. In the process of continuing to press the arc plate 3, the two limiting plates 17 move relative to each other and gradually pass through the through hole 19. When the three arc plates 3 are installed, the two limiting plates 17 contact the inner wall of the through hole of the second shell 16 under the elastic force of the second spring 18. At the same time, the block 1701 contacts the side of the outermost arc plate 3, thereby completing the installation and fixation of the three arc plates 3; when the arc plate 3 needs to be removed, it is only necessary to manually clamp the blocks 1701 of the two limiting plates 17 so that the two limiting plates 17 move relative to each other, and finally the two limiting plates 17 fit together. At this time, the distance between the ends of the two blocks 1701 that are farther apart is less than the diameter of the through hole 19, so that the arc plate 3 can be pulled out.

[0048] like Figure 1 、 Figure 8-9 As shown, the elastic pad includes two pads 20, and the opposite sides of the two pads 20 are respectively provided with a sleeve 21 and a guide column 22, the end sliding rod of the guide column 22 is connected to the sleeve 21, and a third spring 23 is provided between the guide column 22 and the bottom wall of the sleeve 21; the end of the sleeve 21 is provided with a retaining ring 24, and the end of the guide column 22 passes through the retaining ring 24 and extends into the sleeve 21, and the end of the guide column 22 located in the sleeve 21 is provided with a convex ring portion 25; Both pads 20 are iron plates. During installation, the two pads 20 of the elastic gasket are respectively adsorbed on the side surfaces of the corresponding arc-shaped magnetic blocks 28. Although the magnetic poles of the arc-shaped magnetic blocks 28 in the same installation cavity are the same, the two adjacent arc-shaped magnetic blocks 28 will not approach each other. However, due to the sleeves 21 and guide columns 22 respectively arranged on the opposite sides of the two pads 20 in the elastic gasket, the retaining ring 24 and the convex ring portion 25 cooperate to eventually keep a certain distance between the two adjacent arc-shaped magnetic blocks 28.

[0049] like Figure 7As shown, the magnetic cover plate 6 is fixed on the side plate 5, and a pressure plate 26 is hinged on the side of the magnetic cover plate 6 facing the installation cavity. The pressure plate 26 is made of a material that is not easily magnetized, such as a copper plate. A fourth spring 27 is arranged between the pressure plate 26 and the magnetic cover plate 6. In the installed state, the pressure plate 26 is pressed against the arc-shaped magnetic block 28. Under the elastic force of the fourth spring 27, the pressure plate 26 generates an elastic thrust on the pressure plate 26, and the pressure plate 26 generates an extrusion force on the arc-shaped magnetic block 28, so that adjacent arc-shaped magnetic blocks 28 are close to each other. Since there is a third spring 23 between the two pads 20 of the elastic pad, the arc-shaped magnetic block 28 further has an elastic support force to maintain stability.

[0050] The non-destructive testing magnetization device for a long strip of ferromagnetic components provided by the present invention has a support vertical plate 30 integrally formed on the inner wall of the upper shell 1 or the lower shell 2 in order to provide good support for the semi-annular magnetization unit. The number of arc-shaped magnetic blocks 28 in each installation cavity can be flexibly set according to the situation, and the stability of the arc-shaped magnetic blocks 28 in each installation cavity can be maintained by the provided elastic pads; the length of the semi-annular magnetization unit is 210mm-250mm, and the width is 110mm-150mm. The distance between the installation cavities in the semi-annular magnetization unit is 55mm-85mm (that is, the distance between two adjacent arc-shaped magnetic blocks 28 is 55mm-85mm), and the arc-shaped magnetic blocks 28 are neodymium iron boron N series magnets. The use of neodymium iron boron N series magnets by the arc-shaped magnetic blocks 28 can effectively reduce costs.

[0051] The present invention provides a long strip ferromagnetic component non-destructive testing magnetization device, and an additionally configured long strip ferromagnetic component damage detection module (a detection device with a magnetic sensor in the prior art can be used) together constitute a long strip ferromagnetic component damage detection device. Since the magnetization device provided by the present invention can provide a strong magnetic field, the magnetization device and the detection module are configured in a split type, and together constitute an overall detection device for realizing long strip ferromagnetic component damage detection; during assembly, the three arc plates 3 are first fixed between the two side plates 5 by welding, and then the two middle partition plates 4 are welded to the innermost part. On the inner curved plate 3; then connect the curved magnetic blocks 28 corresponding to each mounting cavity through elastic gaskets, and then put the connected curved magnetic blocks 28 into the corresponding mounting cavity, and then install the magnetic cover plate 6 at the opening of each mounting cavity, and fix the magnetic cover plate 6 to the side plate 5 through bolts; then install the assembled semi-annular magnetization unit into the upper shell 1 or the lower shell 2. During installation, you only need to press the semi-annular magnetization unit into the upper shell 1 or the lower shell 2 to complete the fixation of the semi-annular magnetization unit; finally, buckle the upper shell 1 onto the lower shell 2. During the buckling process, ensure that the upper shell 1 is The L-shaped plate 7 is aligned with the through hole on the convex edge plate 10 on the lower shell 2, and then the upper shell 1 is pressed, so that the L-shaped plate 7 moves toward the first shell 11 in the lower shell 2. During the movement, the stop rod 8 is pushed to the outside of the first shell 11. When the stop rod 8 moves to the maximum amplitude, the horizontal plate of the L-shaped plate 7 moves to the lower side of the stop rod 8. At this time, the stop rod 8 loses the limit of the horizontal plate of the L-shaped plate 7. Under the elastic force of the first spring 9, the stop rod 8 moves toward the L-shaped plate 7. Finally, the end of the stop rod 8 is pressed against the horizontal plate of the L-shaped plate 7, thereby fixing the upper shell 1 and the lower shell 2 through the elastic stop member. When it is necessary to remove the upper shell 1 and the lower shell 2, you only need to pull the pull ring 13 until the stop plate 12 moves to the side of the second vertical plate 15 facing away from the L-shaped plate 7, then rotate the stop rod 8 so that the stop plate 12 contacts the side of the second vertical plate 15, and then release your hand. When all the stop rods 8 are moved and rotated, the upper shell 1 and the lower shell 2 can be disassembled; after the upper shell 1 and the lower shell 2 are disassembled, all the stop rods 8 are rotated 90° by the pull ring 13, and the inclined surface of the stop rod 8 faces upward again. After releasing the pull ring 13, the stop rod 8 is reset to facilitate the reassembly of the upper shell 1 and the lower shell 2.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A magnetization device for nondestructive testing of a long strip of ferromagnetic components, comprising an upper shell (1) and a lower shell (2), characterized in that: The upper shell (1) and the lower shell (2) are fixedly connected via an elastic stopper after being buckled together. Semi-annular magnetization units are detachably provided in both the upper shell (1) and the lower shell (2) via elastic connectors. When the upper shell (1) and the lower shell (2) are assembled together, the upper and lower semi-annular magnetization units form a cylindrical magnetization body. The semi-annular magnetization unit comprises three arc-shaped plates (3), two middle partition plates (4) and two side plates (5), the three arc-shaped plates (3) are sequentially attached to form a magnetic outer ring, the two side plates (5) are fixed at both ends of the magnetic outer ring, the two middle partition plates (4) are arranged on the inner side of the magnetic outer ring, and a mounting cavity is formed between the middle partition plates (4) and the side plates (5); A plurality of arc-shaped magnetic blocks (28) are installed in the installation cavity, an elastic pad is provided between two adjacent arc-shaped magnetic blocks (28), and a magnetic cover plate (6) is fixed at the opening of the installation cavity; The elastic connecting member comprises a second shell (16) fixed on the inner side surface of the upper shell (1) or the lower shell (2), and two symmetrically arranged limiting plates (17) with one end located in the second shell (16), a transverse plate (31) being provided on the side surface opposite to one end of the two limiting plates (17) located in the second shell (16), and a second spring (18) being provided between the side surfaces opposite to one end of the two limiting plates (17) located in the second shell (16); a clamping block (1701) is provided at the upper end of the limiting plate (17), the upper end of the clamping block (1701) being an inclined surface, and a through hole (19) for the two limiting plates (17) to pass through is provided on the arc plate (3); The elastic pad comprises two pads (20), and opposite sides of the two pads (20) are respectively provided with a sleeve (21) and a guide column (22), an end sliding rod of the guide column (22) is connected to the sleeve (21), and a third spring (23) is provided between the guide column (22) and the bottom wall of the sleeve (21); The magnetic cover plate (6) is fixed on the side plate (5), a pressure plate (26) is hinged on the side of the magnetic cover plate (6) facing the installation cavity, and a fourth spring (27) is provided between the pressure plate (26) and the magnetic cover plate (6).

2. The magnetization device for nondestructive testing of long strip ferromagnetic components according to claim 1, characterized in that: The elastic stopper comprises an L-shaped plate (7) mounted on the upper shell (1) and a stopper rod (8) mounted on the lower shell (2); the left end of the stopper rod (8) has an inclined surface; a first spring (9) is sleeved on the outer periphery of the stopper rod (8); and when the upper shell (1) and the lower shell (2) are buckled together, the stopper rod (8) can stop the L-shaped plate (7).

3. The magnetization device for nondestructive testing of long strip ferromagnetic components according to claim 2, characterized in that: The openings of the upper shell (1) and the lower shell (2) are both provided with outwardly extending convex plates (10), the L-shaped plate (7) is fixed to the lower side of the convex plate (10) of the upper shell (1), and the lower side of the convex plate (10) of the lower shell (2) is provided with a first shell (11), and the stop rod (8) is installed in the first shell (11).

4. The magnetization device for nondestructive testing of long strip ferromagnetic components according to claim 3, characterized in that: The stop rod (8) is placed horizontally in the first shell (11), and a stop plate (12) is provided at the left end of the stop rod (8). One end of the first spring (9) abuts against the stop plate (12), and the other end abuts against the inner wall of the first shell (11). The right end of the stop rod (8) passes through the outer side surface of the first shell (11), and a pull ring (13) is provided on the right end surface of the stop rod (8).

5. The magnetization device for nondestructive testing of long strip ferromagnetic components according to claim 4, characterized in that: A first vertical plate (14) is provided in the first shell (11), and a second vertical plate (15) is provided on the right side of the first vertical plate (14). The stop plate (12) is a rectangular plate, and the height of the second vertical plate (15) is less than the height of the first vertical plate (14). When the stop rod (8) stops the L-shaped plate (7), the long side of the stop plate (12) is in a horizontal state. When the upper shell (1) and the lower shell (2) need to be disassembled, the stop rod (8) is pulled until the stop plate (12) is located on the side of the second vertical plate (15) facing away from the first vertical plate (14). After the stop rod (8) is rotated 90 degrees, the stop plate (12) can abut against the right side of the second vertical plate (15).

6. The magnetization device for nondestructive testing of an elongated ferromagnetic component according to any one of claims 1 to 5, characterized in that: The material of the arc-shaped magnetic block (28) is a neodymium iron boron N series magnet; the material of the arc-shaped plate (3) is a ferromagnetic material.

7. The magnetization device for nondestructive testing of an elongated ferromagnetic component according to any one of claims 1 to 5, characterized in that: The magnetic field intensity of the circular cavity in the cylindrical magnetized body gradually increases from the center thereof to the side wall of the magnetic cover plate (6) from 0 mT to 650 mT.

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