Channel type magnetic field generating device

Abstract

The invention particularly relates to a channel type magnetic field generation device, and belongs to the technical field of channel type magnetic field generation. The channel type magnetic field generating device comprises a box body assembly and an outer magnet. The box body assembly comprises a box top and a box bottom, the box top and the box bottom are arranged at intervals in the height direction, the box top and the box bottom comprise magnetic conductive materials, and a plurality of connecting parts are arranged on the circumferential walls of the box top and the box bottom at intervals in the circumferential direction of the box top and the box bottom. The outer magnets are used for generating a magnetic field, the outer magnets correspond to the connecting parts of the box top, each outer magnet comprises a first section, a second section and an adjusting part, the first sections are connected with the connecting parts of the box top, the second sections are connected with the connecting parts of the box bottom, and the adjusting parts are connected with the first sections and the second sections; the distance between the first segment and the second segment is adjusted in the height direction. According to the scheme, through the design of the external magnet, the three-dimensional volume and strength of the magnetic field space are continuously adjustable, and the device has the advantages of being low in cost and easy to operate and maintain.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of magnetic field generation, and particularly relates to a channel type magnetic field generating device. BACKGROUND

[0002] The magnetic field generating device is a device capable of generating a stable and controllable magnetic field, and is widely used in the fields of physics, chemistry, biology and the like. For example, in the fields of material science, life science, medical diagnosis and the like, a uniform magnetic field space is needed for experiments and research, and the magnetic field generating device plays an important role. At present, scientists have established a certain scale of uniform magnetic field space in the laboratory through various technical means. However, for some high-end applications such as magnetic fluid power generation and thermoelectric gas power generation, the existing magnetic field generating device still cannot meet the requirements, and cannot provide a uniform magnetic field with a magnetic field strength of more than 4T and a large magnetic field space. The existing steady-state strong magnetic field has high magnetic field strength, large overall volume, but the internal magnetic field space is only 32mm in diameter, needs to work in an ultra-low temperature environment, has high technical complexity, high operation cost, and limited application range (see the online article “Possible Defects of Steady-State Strong Magnetic Field Experimental Device and Magnetic Field Diameter”).

[0003] https: / / chat.baidu.com / search?word=%E7%A8%B3%E6%80%81%E5%BC%BA%E7%A3%81%E5%9C%BA%E5%AE%9E%E9%AA%8C%E8%A3%85%E7%BD%AE%E5%8F%AF%E8%83%BD%E5%AD%98%E5%9C%A8%E7%9A%84%E7%BC%BA%E7%82%B9%E5%92%8C%E7%A3%81%E5%9C%BA%E5%8F%A3%E5%BE%84%E6%98%AF%E5%A4%9A%E5%B0%91&dyTabStr=MTIsMCwzLDEsMiwxMyw3LDYsNSw5&pd=csaitab&setype=cs aitab&extParamsJson=%7B%22enter_type%22%3A%22search_a_tab%22%2C%22sa%22%3A%22vs_tab%22%2C%22apagelid%22%3A%2215727461555468171997%22%2C%22ori_lid%22%3A%2215727461555468171997%22%7DOverall, the current magnetic field generator still has problems such as difficulty in improving the magnetic field strength, difficulty in expanding the magnetic field space, and high cost. SUMMARY

[0004] Based on the problems existing in the prior art, the purpose of the present application is to provide a channel type magnetic field generating device to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned purpose of the application, the technical solution adopted by the present application is: the present application provides a channel type magnetic field generating device, which comprises a box assembly and an external magnet. The box assembly comprises a box top and a box bottom, which are arranged in height direction. The box top and the box bottom comprise a magnetic conductive material, and a plurality of connecting parts are arranged in the circumferential direction of the box top and the box bottom. The external magnet is used to generate a magnetic field, and a plurality of connecting parts are arranged on the box top corresponding to the external magnet. The external magnet comprises a first segment, a second segment and an adjusting part. The first segment is connected with the connecting part of the box top, the second segment is connected with the connecting part of the box bottom, and the adjusting part connects the first segment and the second segment, and is used to adjust the distance between the first segment and the second segment in the height direction.

[0006] In some embodiments, a plurality of external magnets are arranged in the length direction of the box assembly, and two external magnets are arranged in the width direction of the box assembly. The two external magnets are arranged on the two sides of the box assembly, and a channel port is formed between the two external magnets for entering and exiting the box assembly.

[0007] In some embodiments, the device further comprises a lifting assembly connected to the box top and the box bottom, which is used to adjust the distance between the box top and the box bottom in the height direction.

[0008] In some embodiments, the device further comprises two magnetic resistance assemblies. The magnetic resistance assembly comprises a horizontal magnetic resistance plate and a side magnetic resistance plate connected to the two sides of the horizontal magnetic resistance plate. The two horizontal magnetic resistance plates are arranged on the opposite sides of the box top and the box bottom, respectively. The side magnetic resistance plates of the two magnetic resistance assemblies extend between the box top and the box bottom, and are respectively referred to as an upper turning magnetic resistance plate and a lower turning magnetic resistance plate.

[0009] In some embodiments, the connecting part comprises a connecting pipe. The first segment is threadedly connected with the connecting pipe of the box top, and the second segment is threadedly connected with the connecting pipe of the box bottom.

[0010] In some embodiments, one end of the external magnet connected with the box top forms an open end. The first segment is provided with an upper magnetic resistance body at the end of the open end, and the second segment is provided with a lower magnetic resistance body at the end of the open end. The upper magnetic resistance body and the lower magnetic resistance body are arranged between the first segment and the second segment.

[0011] In some embodiments, the magnetic field direction of the upper magnetic resistance body is towards the box top and is inclined away from the external magnet. The angle between the magnetic field direction of the upper magnetic resistance body and the horizontal line is α, which satisfies 40°≤α≤70°. The magnetic field direction of the lower magnetic resistance body is towards the box bottom and is inclined away from the external magnet. The angle between the magnetic field direction of the lower magnetic resistance body and the horizontal line is β, which satisfies -70°≤β≤-40°.

[0012] In some embodiments, the top of the container includes a plurality of sequentially spliced ​​top units, with adjacent top units being detachably connected, and the bottom of the container includes a plurality of sequentially spliced ​​bottom units, with adjacent bottom units being detachably connected.

[0013] In some embodiments, pad beams are provided on opposite sides of the top and bottom of the box.

[0014] In some embodiments, a movable component is further included, comprising a suspension member and a lifting base. The suspension member is used to suspend the movable external magnet, and the lifting base includes a support end and a movable end, the movable end being movably connected to the support end and used to place the external magnet.

[0015] The channel-type magnetic field generator provided in this application has a cuboid top and bottom, forming a cuboid magnetic field space that serves as a working fluid channel. However, this invention does not require the magnetic field space to be cuboid, nor is it limited to a channel-type magnetic field structure model. The top and bottom can also be disc-shaped, or elliptical, trapezoidal, pentagonal, hexagonal, or other polygonal shapes. Similarly, multiple pairs of identical external magnets are uniformly arranged around the circumference of the top and bottom, thus forming a cylindrical, elliptical, trapezoidal, pentagonal, or hexagonal magnetic field space between the top and bottom to adapt to various magnetic field application needs. This invention focuses on channel-type magnetic field generators, exploring the principle of generating strong magnetic fields in a large space, in order to provide a research method for demonstrating and establishing magnetic field spaces of various shapes.

[0016] The present invention has the following beneficial effects:

[0017] 1. Traditional magnetic field devices, especially superconducting magnets, have fixed magnet structures, resulting in an unchangeable physical size for the internal uniform magnetic field space, severely limiting the volume of experimental objects. This design achieves flexible customization of the magnetic field space in the vertical dimension by designing the top and bottom of the chamber with adjustable spacing. When larger experimental samples or equipment need to be placed, the distance between the top and bottom of the chamber can be increased, thereby obtaining a larger effective magnetic field space. Conversely, for small samples or experiments requiring a higher magnetic field gradient, the spacing can be reduced to enhance the magnetic field concentration. This design completely breaks free from the constraints of fixed apertures, opening up possibilities for high-end applications requiring larger spaces, such as magnetohydrodynamic power generation and thermoelectric gas power generation.

[0018] 2. Existing technologies often only provide small-scale point-like or linear uniform magnetic field regions. This device allows for adjustment of the area of ​​the top and bottom of the chamber, enabling users to expand or shrink the coverage area of ​​the uniform magnetic field horizontally according to experimental needs. For example, in large-sample processing in materials science or multi-sample parallel experiments in biomedicine, the area of ​​the top and bottom of the chamber can be increased to accommodate larger or more experimental objects. Furthermore, combined with the adjustable distance between the top and bottom of the chamber, this device achieves comprehensive and dynamic configuration of the three-dimensional volume (length, width, and height) of the magnetic field space, offering a significant advantage over traditional fixed magnetic field devices.

[0019] 3. Traditional electromagnets or superconducting magnets occupy the central position of the apparatus, thus squeezing valuable internal experimental space. In this design, the external magnet is placed outside the enclosure. The electromagnet that generates the magnetic field is positioned outside the enclosure, and a closed magnetic circuit is formed using high-permeability materials (such as the top and bottom of the enclosure itself), efficiently "guiding" the magnetic field to the area between the top and bottom of the enclosure. This creates a pure, uniform magnetic field channel between the top and bottom of the enclosure, unobstructed by any coils. The experimental space is completely freed up, and space utilization is greatly improved.

[0020] 4. Conventional magnetic field generators struggle to meet the demands of high-intensity magnetic fields. This solution utilizes an external magnet, whose magnetic field strength is directly related to the driving current. Therefore, by precisely controlling the input current, continuous and wide-range adjustment of the magnetic field strength can be achieved. For example, this device can not only increase the magnetic field strength by increasing the current to meet the extreme demands of cutting-edge scientific research, but also adjust the magnetic field to a lower intensity in routine experiments as needed. This expands the device's application range, allowing a single unit to cover experimental requirements ranging from low to high magnetic field strengths. Furthermore, it significantly reduces energy consumption, avoids energy waste, and solves the problems of high energy consumption and expensive operating costs associated with existing high-magnetic-field devices.

[0021] 5. Superconducting magnetic field generators rely on expensive and complex cryogenic cooling systems, resulting in very high purchase and maintenance costs. This device, however, can operate at room temperature or under simple water / air cooling conditions, has low environmental requirements, is easy to operate, and is readily available. Furthermore, its electromagnetic technology is mature; with a stable power supply and a reliable cooling system, it can achieve long-term, continuous, and stable operation, significantly improving equipment reliability.

[0022] 6. The direction of the remanent magnetic field of the upper magnetizer is at an angle α to the horizontal line, and 40°≤α≤70°. This remanent magnetic field is decomposed into two magnetic field components: one horizontal magnetic field component facing into the cavity, and the other vertical magnetic field component facing upward towards the upper magnetic tube. The horizontal magnetic field component repels the magnetic lines of force in the cavity, preventing them from leaking out of the opening of the outer magnet and forcing them to be transmitted along the vertical line of the cavity. The vertical magnetic field component repels the magnetic lines of force in the upper magnetic tube, preventing them from leaking out of the upper magnetic tube and forcing them to be transmitted along the upper magnetic tube.

[0023] The remanent magnetic field of the lower base and the oblique resistive body of the lower magnetic resistive body forms an angle β with the horizontal line, and -70°≤β≤-40°. This remanent magnetic field is decomposed into two magnetic field components: a horizontal magnetic field component pointing towards the cavity, and a vertical magnetic field component pointing downwards towards the lower magnetic guide tube. The horizontal magnetic field component repels the magnetic lines of force in the cavity, preventing them from leaking out of the opening of the outer magnet and forcing them to propagate along the vertical line of the cavity. The vertical magnetic field component repels the magnetic lines of force in the lower magnetic guide tube, preventing them from leaking out of the lower magnetic guide tube and forcing them to propagate along the lower magnetic guide tube. The remanent magnetic field of the baffle of the lower magnetic resistive body is horizontally oriented towards the cavity, preventing the magnetic lines of force in the cavity from leaking out of the opening of the outer magnet and forcing them to propagate along the vertical line of the cavity.

[0024] The opening end of the outer magnet is equipped with a pair of upper and lower magnetic resistors, which is equivalent to placing a pair of large magnetic resistors to form a magnetic flux barrier. This not only prevents the magnetic lines of force in the box cavity from leaking out, but also prevents the magnetic lines of force in the lower magnetic tube from being directly connected to the magnetic lines of force in the upper magnetic tube, thus preventing short circuits and forcing the magnetic lines of force to be transmitted into the box cavity along a specified path.

[0025] Furthermore, by using the upper and lower magnetic resistors in combination, firstly, the divergent magnetic field lines can be compressed and bundled, making them more concentrated and parallel in the horizontal direction. Secondly, the magnetic field at the edge of the outer magnet is usually non-uniform, exhibiting edge effects. By establishing a regular, symmetrical magnetic flux barrier at the opening end, the magnetic resistor can smooth out the non-uniformity caused by these edge effects, making the distribution of magnetic field lines entering the cavity more consistent, thereby improving the magnetic field quality of the entire working area.

[0026] 7. The outer magnet connection part adopts positive and negative thread nuts to connect positive thread screws and negative thread screws. Magnetic fluid is injected into the nut to ensure that the connection part has rigid support, telescopic function and disassembly function. This allows the outer magnet to be modularly assembled, adjustable in height and retraction, and freely disassembled to form an organic and flexible whole. At the same time, the magnetic fluid is used to seal the connection part, eliminate air gaps and reduce magnetic resistance, so as to achieve high magnetic permeability connection of the connection part and flexible connection with the inner core, which creates conditions for telescopic function.

[0027] Furthermore, the magnetic fluid, as a viscous fluid, fills the microscopic gaps in the threaded connection. When the entire magnetic system is subjected to mechanical shock or vibration, the viscosity and flowability of the fluid act as a damping agent, thus protecting the external magnet. Magnetic fields always tend to close along the path of least magnetic reluctance. When there is a slight misalignment between the screw and nut, the magnetic field drives the magnetic fluid to flow towards and fill the gap with the greatest magnetic reluctance. This causes the magnetic fluid to generate a centering force, guiding the connecting parts towards the optimal magnetic conduction position, thereby compensating for machining and assembly tolerances.

[0028] 8. The top and bottom of the box are assembled from multiple units in sequence. Examples of assembly methods include concave-convex butt joints, convex plate connections, and double-groove plate connections. Magnetic liquid is injected into the screw holes at each joint to ensure that the connection has rigid serial connection and disassembly and decomposition functions, allowing the top and bottom of the box to be assembled and disassembled freely in modules, forming an organic and flexible whole. Magnetic liquid is also used to seal the connection, eliminate air gaps, reduce magnetic resistance, and achieve high magnetic permeability connection of the connection.

[0029] Furthermore, the magnetic fluid, as a viscous fluid, fills the microscopic gaps in the threaded connection. When the entire magnetic system is subjected to mechanical shock or vibration, the viscosity and flowability of the fluid act as damping, thus protecting the top and bottom of the tank. Magnetic fields always tend to close along the path of least magnetic reluctance. When there is a slight misalignment between the screw and nut, the magnetic field drives the magnetic fluid to flow towards and fill the gap with the greatest magnetic reluctance. This causes the magnetic fluid to generate a centering force, guiding the connecting parts towards the optimal magnetic conduction position, thereby compensating for machining and assembly tolerances. Attached Figure Description

[0030] Figure 1 A simplified three-dimensional diagram of a magnetic field generating device.

[0031] 101: Box top, 102: Box bottom, 103: Upper support beam, 104: Upper middle beam, 105: Lower support beam, 106: Lower middle beam, 107: First lifting rod, 108: Box cavity, 109: Support body, 110: External magnet, 111: Channel entrance, 112: Channel exit.

[0032] Figure 2 Simplified 3D diagram of the magnetic blocking plate

[0033] 201: Horizontal magnetic deflector plate; 202: Downward-folding magnetic deflector plate; 203: Upward-folding magnetic deflector plate; 204: Bolt; 205: Connector pipe; 301: Core radius r0

[0034] Figure 3 Simplified 3D diagram of the top and bottom of the container.

[0035] 302:a 箱顶 , 303:b 箱顶,304:h 箱顶 ,305:a 箱腔 ,306:b 箱腔 ,307:h 箱腔 ,308:a 箱底 , 309:b 箱底 ,310:h 箱底 ,311:h 支撑

[0036] Figure 4 Right view of the top and bottom of the container.

[0037] 101: Box top, 102: Box bottom, 103: Upper support beam, 104: Upper middle beam, 105: Lower support beam, 106: Lower middle beam, 201: Horizontal magnetic blocking plate, 202: Downward-folding magnetic blocking plate, 203: Upward-folding magnetic blocking plate, 204: Bolt, 205: Connector, 206: Hinge, 207: Rubber sleeve, 208: First internal magnetic direction, 301: Magnetic core radius r0, 306: b 箱腔 ,307:h 箱腔 , 309:b 箱底 ,310:h 箱底

[0038] Figure 5 Front view of the magnetic field generating device

[0039] 101: Box top, 102: Box bottom, 103: Upper support beam, 106: Lower support beam, 108: Box cavity, 201: Horizontal magnetic plate, 205: Connecting pipe, 207: Rubber sleeve, 208: First internal magnetic direction, 401: Bottom arc, 402: Straight pipe, 403: Threaded nut (positive and negative threads), 404: Column beam, 405: Excitation direction, 406: Top arc, 407: Screw, 408: Magnetic fluid 409: Upper elbow; 410: Positive thread screw; 411: Negative thread screw; 412: Upper magnetic guide tube; 413: Square rod; 414: U-bolt; 415: Upper magnetic deflector; 416: Forked U-bolt; 417: Spring; 418: Lower magnetic guide tube; 419: Magnetic induction intensity B0; 420: Lower magnetic deflector; 421: Lower elbow; 422: Washer; 423: Second internal magnetic direction

[0040] Figure 6 : 1 cross-sectional view of the external magnet

[0041] 207: Rubber sleeve; 301: Core radius r0; 412: Upper magnetic guide tube; 415: Upper magnetic resistive element; 418: Lower magnetic guide tube; 420: Lower magnetic resistive element; 501: Top arc center O1; 502: Bottom arc center O2; 503: Frame; 504: End plate; 505: Length L of the spur thread screw. 正牙 506: Reverse threaded screw length L 反牙 507: Column-beam height h柱梁 508: Column-beam winding height h 柱梁绕 509: Inner radius r of the top (bottom) arc skeleton 弧骨内 510: Length L of the inner arc of the top (bottom) arc skeleton 弧骨内 511: Inner radius r of the top (bottom) arc 弧内 512: Top (bottom) arc bending radius r 弧曲 513: Outer radius r of the top (bottom) arc 弧外 514: Length L of the central axis arc of the top (bottom) arc 弧轴 515: Outer radius r of the top (bottom) arc skeleton 弧骨外 516: Gap d between the two end plates at the middle of the top (bottom) arc 端间 517: Diameter D0 of the top (bottom) arc cross-section; 518: Length L of the nut with positive and negative threads. 正反螺 519: Radius r of the positive and negative thread nuts 正反螺 520: Bending radius r of the elbow 弯曲 521: Length L of the arc of the elbow's central axis 弯头 522: Side length a of the square bar section 方杆 523: Length L of the square rod 方杆 524: Length L of the outer arc of the top (bottom) arc skeleton 弧骨外

[0042] Figure 7 : A three-dimensional diagram of the magnetoresistive element at the opening of the C-shaped external magnet at each of the left and right ends of the cavity.

[0043] 423: Second internal magnetic direction; 424: Upper base; 425: Upper oblique resist; 426: Lower base; 427: Lower oblique resist; 428: Baffle; 530: Upper left magnetic resist; 531: Lower left magnetic resist; 532: Upper right magnetic resist; 533: Lower right magnetic resist.

[0044] Figure 8 3D diagram of mobile scaffolding

[0045] 110: External magnet; 504: End plate; 550: Vertical rod; 551: Caster; 552: Caster and tripod; 553: Buckle; 554: Outrigger; 555: Sweeping rod; 556: Scaffold board; 557: Second lifting rod; 558: Jack; 559: Lifting platform; 560: Height h of lifting platform from the ground. 升降板 561: Pad plate; 562: Double drum winch; 563: Diagonal brace; 564: Support frame; 565: Support clamp; 566: Main rope; 567: Auxiliary rope; 568: Triangular beam; 569: Fixed pulley; 570: Pulley block; 571: Lifting rope; 572: Ring beam

[0046] Figure 9 Front view of the main body of the box cavity

[0047] 101: Box top, 102: Box bottom, 103: Upper support beam, 105: Lower support beam, 201: Horizontal magnetic plate, 205: Connecting pipe, 208: First internal magnetic direction, 302: a 箱顶 ,304:h 箱顶 ,305:a 箱腔 ,307:h 箱腔 ,308:a 箱底 ,310:h 箱底 423: Second internal magnetic direction; 580: Magnetic induction intensity B0 in the cavity; 581: Magnetic flux Φ0 in the cavity; 582: Magnetic reluctance R in the cavity. g 584: Half-section length of the enclosure is 0.5L0; 585: Length of each section of the enclosure is L0.

[0048] Figure 10 Box cavity length division diagram

[0049] 583: Magnetic induction intensity B in the box cavity 01 601:O 11 Point, 602: O 21 Point, 603: O 31 Point, 604: O 41 Point, 605: O 51 Point, 606: O 61 Point, 607: O 71 Point, 611: P 11 Point, 612: P 21 Point, 613: P 31 Point, 614: P 41 Point, 615:P 51 Point, 616: P 61 Point, 617: P 71 point

[0050] Figure 11 Top view of the cavity

[0051] 583: Magnetic induction intensity B in the box cavity 01 584: Half-section length of the box cavity is 0.5L0; 585: Length of each section of the box cavity is L0; 601: O 11 Point, 602: O 21 Point, 603: O 31 Point, 604: O 41 Point, 605: O 51 Point, 606: O 61 Point, 607: O 71 Point, 621: O 12 Point, 622:O 22 Point, 623:O 32 Point, 624: O 42 Point, 625: O 52Point, 626:O 62 Point, 627:O 72 Point 631: Magnetomotive force F 11 632: Magnetomotive force F 21 633: Magnetomotive force F 31 634: Magnetomotive force F 41 635: Magnetomotive force F 51 636: Magnetomotive force F 61 637: Magnetomotive force F 71 641: Magnetomotive force F 12 642: Magnetomotive force F 22 643: Magnetomotive force F 32 644: Magnetomotive force F 42 645: Magnetomotive force F 52 646: Magnetomotive force F 62 647: Magnetomotive force F 72

[0052] Figure 12 : Figure 10 , 11 Magnetic circuit analysis diagram

[0053] 631: Magnetomotive force F 11 632: Magnetomotive force F 21 633: Magnetomotive force F 31 634: Magnetomotive force F 41 635: Magnetomotive force F 51 636: Magnetomotive force F 61 637: Magnetomotive force F 71 641: Magnetomotive force F 12 642: Magnetomotive force F 22 643: Magnetomotive force F 32 644: Magnetomotive force F 42 645: Magnetomotive force F 52 646: Magnetomotive force F 62 647: Magnetomotive force F 72 581: Magnetic flux Φ0 in the cavity; 582: Magnetic reluctance R in the cavity. g 661: Magnetoresistive R 11 662: Magnetoresistive R 12 663: Magnetoresistive R 21 664: Magnetoresistive R 22 665: Magnetoresistive R 31 666: Magnetoresistive R 32 667: Magnetoresistive R 41 668: Magnetoresistive R 42 669: Magnetoresistive R 51 670: Magnetoresistive R 52671: Magnetoresistive R 61 672: Magnetoresistive R 62 673: Magnetoresistive R 71 674: Magnetoresistive R 72 675: Magnetic resistance 0.5R c 676: Magnetoresistive R c

[0054] Figure 13 : Figure 12 Equivalent magnetic circuit diagram

[0055] 581: Magnetic flux Φ0 in the cavity; 582: Magnetic reluctance R in the cavity. g 681: Magnetomotive force F1, 682: Magnetomotive force F2, 683: Magnetomotive force F3, 684: Magnetomotive force F4, 685: Magnetomotive force F5, 686: Magnetomotive force F6, 687: Magnetomotive force F7, 691: Magnetic reluctance R1, 692: Magnetic reluctance R2, 693: Magnetic reluctance R3, 694: Magnetic reluctance R4, 695: Magnetic reluctance R5, 696: Magnetic reluctance R6, 697: Magnetic reluctance R7, 701: Magnetic flux Φ1, 702: Magnetic flux Φ2, 703: Magnetic flux Φ3, 704: Magnetic flux Φ4, 705: Magnetic flux Φ5, 706: Magnetic flux Φ6, 707: Magnetic flux Φ7, 708: Magnetic flux Φ8, 709: Magnetic flux Φ9, 710: Magnetic flux Φ 10 711: Magnetic flux Φ 11 712: Magnetic flux Φ 12

[0056] Figure 14 Diagram showing how to assemble the top and bottom of the container.

[0057] In Figure 14-1, 101: top of the box, 102: bottom of the box, 721: first groove, 722: first convex plate, 723: first bolt, 724: first screw hole, 725: first screw, 726: first magnetic fluid.

[0058] In Figure 14-2, 101: top of the box, 102: bottom of the box, 731: second convex plate, 732: second groove, 733: second bolt, 734: second screw, 735: second magnetic fluid, 736: second screw hole.

[0059] In Figure 14-3, 101: top of the box, 102: bottom of the box, 741: double groove plate, 742: third convex plate, 743: third screw hole, 744: third groove, 745: third bolt, 746: third screw, 747: third magnetic fluid. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0061] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0062] This invention provides a magnetic field generating device, mainly comprising a box top 101, a box bottom 102, a support body 109, a first lifting rod 107, a magnetic blocking plate, an upper magnetic blocking body 415, a lower magnetic blocking body 420, an outer magnet 110, a positive and negative thread nut 403 and a positive thread screw 410, a negative thread screw 411, and a movable scaffold. Figure 8 )wait.

[0063] The magnetic field generating device of this application embodiment includes a housing assembly and an external magnet 110. The housing assembly includes a housing top 101 and a housing bottom 102, which are spaced apart along the height direction. The housing top 101 and the housing bottom 102 are made of magnetically conductive material. Those skilled in the art can select suitable types of materials from existing materials. In the following, the technical solution of this application provides exemplary material selections for the housing top 101 and the housing bottom 102.

[0064] Around the circumference of the top 101 and bottom 102 of the box, with Figure 1 Taking a perspective example, the circumferential direction of the top 101 refers to the side walls on the front, back, left, and right sides of the top 101. Multiple connecting parts are spaced apart on the circumferential walls of the top 101 and bottom 102, meaning multiple connecting parts are located on the side walls of the top 101 and bottom 102. The connecting parts of the top 101 and bottom 102 are correspondingly arranged; that is, along the height direction, at a certain connecting part of the top 101, the connecting part of the bottom 102 is located below the connecting part of the top 101.

[0065] like Figure 1 , 2As shown, the top 101 and bottom 102 of the box are two rectangular soft magnetic plates of the same size, parallel to each other. The bottom surface of the bottom 102 is supported by two or more support bodies 109, which are located on the ground or a base. The front and rear inner edges of the top surface of the bottom 102 and the bottom surface of the top 101 are opened by two or more pairs of first lifting rods 107, maintaining a certain distance to form a rectangular box cavity 108, which serves as a channel-type magnetic field space.

[0066] In some embodiments, the top of the container 101 includes a plurality of sequentially connected top units 101, with adjacent top units detachably connected to each other, and the bottom of the container 102 includes a plurality of sequentially connected bottom units 102, with adjacent bottom units 102 detachably connected to each other. For example... Figure 14 As shown, when the top 101 and bottom 102 of the box are relatively long, they can be spliced ​​together using small cuboids (i.e., box top units). There are three splicing methods: concave-convex butt joint, convex plate connection, and double-groove plate connection.

[0067] The first lifting rod 107 in this embodiment is a lifting assembly. The specific structure of the first lifting rod 107 is well known to those skilled in the art and will not be described in detail here. Of course, those skilled in the art can also select other suitable lifting assemblies from existing structures.

[0068] It should be noted that, as a preferred embodiment, the top 101 and the bottom 102 of the container can be arranged vertically and vertically, but in some special application scenarios, the top 101 and the bottom 102 of the container can be arranged horizontally or diagonally, etc.

[0069] In some embodiments, pad beams are respectively provided on opposite sides of the top 101 and bottom 102 of the box, for example, such as Figure 3 , 4 As shown, on the front and rear edges of the top surface of the box 101, an upper pad beam 103 is welded, which is a right trapezoidal prism and is made of soft magnet. Its bottom surface is parallel to the top surface, and its side surface is in close contact with the top surface of the box 101. Its bottom surface and the side surface of the box 101 are on the same plane. On the front and rear edges of the bottom surface of the box 102, a lower pad beam 105 is welded, which is a right trapezoidal prism and is made of soft magnet. Its bottom surface is parallel to the top surface, and its side surface is in close contact with the bottom surface of the box 102. Its bottom surface and the side surface of the box 102 are on the same plane. The surfaces are located on the same plane; the upper pad beam 103 is spliced ​​with the front and rear sides of the box top 101, and the lower pad beam 105 is spliced ​​with the front and rear sides of the box bottom 102, both forming a large plane to support the thicker pipe 205; the upper middle beam 104 set on the front and rear center line of the upper bottom of the box top 101 and the lower middle beam 106 set on the front and rear center line of the lower bottom of the box bottom 102 are both non-magnetic rigid materials, in the shape of a slender cuboid, and are fixed to the upper bottom surface of the box top 101 and the lower bottom surface of the box bottom 102 by means of screws or adhesive.

[0070] In some embodiments, the connecting portion includes a connecting pipe 205, a first segment being threadedly connected to the connecting pipe 205 on the top of the housing 101, and a second segment being threadedly connected to the connecting pipe 205 on the bottom of the housing 102. For example... Figure 2 , 3 As shown, two pairs of upper and lower connecting pipes 205 are welded to the sides of the top 101 and bottom 102 on the left and right ends, as well as the upper and lower support beams 103 and 105. One or more pairs of upper and lower connecting pipes 205 are also welded evenly to the front and back of the middle section of the top 101 and bottom 102, as well as the upper and lower support beams 103 and 105. Each connecting pipe 205 is a solid soft magnetic screw with a screw diameter that matches the positive and negative thread nuts 403. The opening faces outward and is perpendicular to the four sides of the top 101 and bottom 102. They are symmetrically welded to the left and right ends and the front and back sides of the top 101 and bottom 102.

[0071] In some embodiments, a plurality of external magnets 110 are spaced apart along the length of the housing assembly, and two external magnets 110 are provided along the width of the housing assembly. The two external magnets 110 are spaced apart on both sides of the housing assembly, and a channel port for entering and exiting the housing assembly is formed between the two external magnets 110. The channel port may include a channel inlet 111 and a channel outlet 112.

[0072] like Figure 1 , 2 As shown in Figure 3, the direction connecting the left and right sides of the outer magnet 110 can be the length direction of the box, and the direction connecting the front and rear sides of the outer magnet 110 can be the width direction of the box.

[0073] At the left end of the cavity 108, two pairs of external magnets 110 are installed side-by-side at maximum spacing on the left side of the top 101 and bottom 102 of the cavity, as well as on the upper and lower connecting pipes 205 of the upper and lower support beams 103 and 105, leaving a rectangular space between them as a passage entrance 111; in the middle section of the cavity 108, one or more pairs of external magnets 110 are evenly and symmetrically installed on the front and back of the top 101 and bottom 102 of the cavity, as well as on the upper and lower connecting pipes 205 of the upper and lower support beams 103 and 105; at the right end of the cavity 108, Two pairs of external magnets 110 are installed side-by-side at the maximum spacing on the right side of the top 101 and bottom 102 of the enclosure, as well as on the upper and lower connecting pipes 205 of the upper and lower support beams 103 and 105. A rectangular space is left between them as a channel outlet 112. The channel inlet 111 and channel outlet 112 are of equal size and can be interchanged. The height of the channel inlet 111 and channel outlet 112 is equal to the height of the middle section of the enclosure 108, and the width and length of the channel inlet 111 and channel outlet 112 are less than the width and length of the middle section of the enclosure 108.

[0074] In some embodiments, two magnetic blocking components are also included. The magnetic blocking components include a horizontal magnetic blocking plate 201 and side magnetic blocking plates connected to both sides of the horizontal magnetic blocking plate 201. The two horizontal magnetic blocking plates 201 are respectively disposed on opposite sides of the top 101 and the bottom 102 of the box. The side magnetic blocking plates of the two magnetic blocking components extend between the top 101 and the bottom 102 of the box and are respectively referred to as the upward-folding magnetic blocking plate 203 and the downward-folding magnetic blocking plate 202.

[0075] like Figure 2 , 4 As shown, the magnetic blocking assembly is a permanent magnet in the shape of a cuboid. The horizontal magnetic blocking plate 201 and the side magnetic blocking plates, when assembled, form a U-shape. For example, the magnetic blocking assembly may include a horizontal magnetic blocking plate 201 on the top 101 of the enclosure and downward-folding magnetic blocking plates 202 on the front and rear sides, a horizontal magnetic blocking plate 201 under the bottom 102 of the enclosure and upward-folding magnetic blocking plates 203 on the front and rear sides, all of which are composed of multiple small magnetic blocking plates. Each horizontal magnetic blocking plate 201 is of equal size and horizontally and evenly covers the upper central beam 104 on the bottom surface of the top 101, the upper pad beams 103 on both sides, and the lower central beam 106 on the bottom surface of the bottom 102, and the upper pad beams 103 on both sides. Below the lower support beam 105; the downward-folding magnetic blocking plate 202 and the upward-folding magnetic blocking plate 203 are of the same size; the horizontal magnetic blocking plates 201 on the top of the box 101 are hinged together with the downward-folding magnetic blocking plates 202 on the front and rear sides of the top of the box 101 using hinges 206, leaving a notch when encountering the connecting pipe 205 to fold over; the horizontal magnetic blocking plates 201 under the bottom of the box 102 are hinged together with the upward-folding magnetic blocking plates 203 on the front and rear sides of the bottom of the box 102 using hinges 206. When encountering the connecting pipe 205, each of the upward-flipping magnetic plates 203 leaves a notch to flip over; the downward-flipping magnetic plates 202 and upward-flipping magnetic plates 203 on the front and rear sides are symmetrical and identical, each extending forward by half a section of thin plate, reducing the thickness to half of the original plate. The two thin plates overlap in a staggered manner, with a groove in the middle, and are connected by bolts 204 passing through the grooves of the two thin plates, allowing the two thin plates to move towards each other; the horizontal magnetic plates 201 on the top of the box 101 are hinged to the downward-flipping magnetic plates 202, and the magnetic plates under the bottom of the box 102 are hinged to each other. The horizontal magnetic blocking plate 201 is hinged to each of the upward-folding magnetic blocking plates 203, and each of the downward-folding magnetic blocking plates 202 is staggered and overlapped with each of the upward-folding magnetic blocking plates 203, thereby surrounding the upper and lower outer bottom surfaces and the front and rear sides of the box cavity 108; the direction of the residual magnetic field of each magnetic blocking plate, referred to as the first internal magnetic direction 208, is from the outside to the inside, preventing the magnetic lines of force of the box top 101, box bottom 102, and box cavity 108 from leaking out; each magnetic blocking plate is covered with a rubber sleeve 207 to facilitate flexible contact with other components.

[0076] The external magnet 110 is used to generate a magnetic field. Multiple external magnets 110 are provided corresponding to the connection part of the top of the box 101. The external magnet 110 includes a first segment, a second segment and an adjustment component. The first segment is connected to the connection part of the top of the box 101, the second segment is connected to the connection part of the bottom of the box 102, and the adjustment component is connected to the first segment and the second segment to adjust the distance between the first segment and the second segment along the height direction.

[0077] like Figure 5 , 6 As shown in Figure 8, the external magnet 110 uses an electromagnetic coil and is C-shaped, U-shaped, [-shaped], or kidney-shaped. For ease of calculation and simplification, it is assumed that the external magnet 110 is C-shaped, consisting of a top arc 406, a bottom arc 401, a column beam 404, and an open end. In this case, the top arc 406 forms the first segment, and the bottom arc 401 forms the second segment. The end of the external magnet 110 connecting the top 101 and the bottom 102 of the box forms an open end, which is further divided into an upper magnetic guide tube 412 and a lower magnetic guide tube 418, both of which consist of a straight tube 402, a right-angle bend, and a square rod 404. 13. The solid soft magnetic round tube is formed by connecting straight tubes 402 in series. The top of the box 101 corresponds to the upper bend 409, and the bottom of the box 102 corresponds to the lower bend 421. A section of straight tube 402 is welded to each end of the top arc 406 and bottom arc 401, one end of each of the two right-angle bends, and one end of each of the two square rods 413. The other ends of the right-angle bends and square rods 413 are directly welded. The straight tube 402 at the top arc 406 is connected to the column beam 404, and the straight tube 402 at the bottom arc 401. 2. For the column beam 404, the top arc 406, the straight pipe 402 and the upper bend 409, the bottom arc 401, the straight pipe 402 and the lower bend 421, the two square rods 413 and the connecting pipe 205, respectively machine with positive thread screws and negative thread screws to make a pair of positive thread screws 410 and negative thread screws 411; make multiple positive and negative thread nuts 403, with a small hole in the middle of the side, and machine screws on them; fit each positive and negative thread nut 403 into each pair of positive thread screws 410. 0. Tighten the positive and negative thread nuts 403 on the reverse thread screw 411, add magnetic liquid 408, screw on the screw 407, and connect the top arc 406, bottom arc 401, column beam 404, upper magnetic tube 412, and lower magnetic tube 418 in series to form a C-shaped outer magnet 110, forming a C-shaped magnetic circuit. Then connect it with the top of the box 101 and the bottom of the box 102 to form a telescopic connection structure, which can effectively adjust the gap between the outer magnet 110 and the box assembly.

[0078] Coil frames 503 are respectively fitted onto column beam 404, top arc 406, and bottom arc 401. A semi-circular ring-shaped coil frame 503 with end plates 504 at both ends and two additional end plates 504 spaced apart in the middle is fitted onto top arc 406 and bottom arc 401. A hollow cylindrical coil frame 503 with end plates 504 at both ends is fitted onto column beam 404. Multiple heat dissipation holes are provided in each coil frame 503. Except for the middle coil frame 503 in top arc 406 and bottom arc 401 where hanging ropes 571 and supports 564 are installed between the end plates 504, the other coil frames 503 are wound with multiple layers of coil. A thermally conductive silicone pad is placed under each layer of coil, and thermally conductive silicone is filled into the gaps between the coils. Cooling equipment, such as fans, oil tanks, or water tanks, is then added to cool the energized coils using air cooling, oil cooling, or water cooling methods. Each set of external magnets 110 is placed in a mobile scaffold. Figure 8 ), produced according to unified standards.

[0079] In some embodiments, one end of the outer magnet 110 connecting the top 101 and the bottom 102 of the enclosure forms an open end. An upper magnetic resistive element 415 is provided at the end of the first segment located at the open end, and a lower magnetic resistive element 420 is provided at the end of the second segment located at the open end. The upper magnetic resistive element 415 and the lower magnetic resistive element 420 are disposed between the first and second segments. In this embodiment, the upper magnetic guide tube 412 and the lower magnetic guide tube 418 form an open end.

[0080] like Figure 5 , 7 As shown, on the lower bottom surface of the upper magnetic tube 412 and the upper bottom surface of the lower magnetic tube 418 at the open end of each C-shaped external magnet 110, two U-bolts 414 and one forked U-bolt 416 are used to attach an upper magnetic resistor 415 and a lower magnetic resistor 420, respectively. Both the upper magnetic resistor 415 and the lower magnetic resistor 420 are permanent magnets. A compression spring 417 is inserted between the upper magnetic resistor 415 and the lower magnetic resistor 420 to keep them apart. The upper magnetic resistor 415 consists of a cuboid upper base 424 and a right-angled triangular prism upper oblique resistor 425. The upper inclined resistive element 425 is installed on the top surface of the upper base 424 at the end away from the cavity 108 by means of threaded connection or welding, and its inclined surface is in close contact with the upper elbow 409; the lower resistive element 420 consists of a cuboid lower base 426, a right-angled triangular prism lower inclined resistive element 427, and a small cuboid baffle 428. The lower inclined resistive element 427 is installed on the bottom surface of the lower base 426 at the end away from the cavity 108 by means of threaded connection or welding, and its inclined surface is in close contact with the lower elbow 421. The baffle 428 is installed vertically on the lower base 426 by means of threaded connection or adhesive. The base 426 has an upper bottom surface near the cavity 108; the lower bottom surface of the upper magnetic resistive body 415 is parallel to and directly opposite the upper bottom surface of the lower magnetic resistive body 420, with a gap between them, and the baffle 428 always seals the gap to the opening of the cavity 108; the direction of the residual magnetic field inside the upper magnetic resistive body 415 and the lower magnetic resistive body 420, referred to as the second internal magnetic direction 423, both point in the same direction. Among them, the internal magnetic direction of the upper magnetic resistive body 415 starts from the bottom corner of the upper base 424 where the upper inclined resistive body 425 is located, points parallel to the top of the upper magnetic tube 412, and forms an angle of [40°, 70°] with the horizontal line. The magnetic direction within the lower magnetic resistive body 420 is inclined at an angle of [-70°, -40°] from the apex of the lower base 426 where the lower inclined resistive body 427 is located, parallel to the lower magnetic guide tube 418 and inclined at an angle of [-70°, -40°] with respect to the horizontal line. The absolute values ​​of the inclination angles of the magnetic directions within the upper magnetic resistive body 415 and the lower magnetic resistive body 420 are equal. The magnetic direction within the baffle 428 is horizontal from the gap between the upper magnetic resistive body 415 and the lower magnetic resistive body 420, pointing into the cavity 108. Each magnetic resistive body is covered with a rubber sleeve 207 to allow for flexible contact with other components. Each C-shaped outer magnet 110 is equipped with a pair of upper magnetic resistive bodies 415 and lower magnetic resistive bodies 420 at its open end.

[0081] In some embodiments, a movable component is also included, comprising a suspension member and a lifting base. The suspension member is used to suspend the movable external magnet 110, and the lifting base includes a support end and a movable end, the movable end being movably connected to the support end and used to place the external magnet 110. Exemplarily, the movable scaffolding and its associated components form the suspension member, and the lifting plate 559 forms the lifting base.

[0082] like Figure 8 , 5 As shown, the movable scaffolding is rectangular in shape and has 8 vertical poles 550, 8 casters 551, and 5 layers of ring beams 572, all made of non-magnetic rigid materials. The ring beams 572 and inner crossbeams at the middle and lower right sides of the scaffolding are made into tie rods 553, which can be opened and closed. There are two sets of triangular beams 568 at the front and rear of the upper end of the scaffolding to support the top beam. A cross beam is erected in the middle of the top beam, and two hanging rods are suspended from the cross beam. Each hanging rod is suspended from one pulley block 570, using one main rope 566 and one auxiliary rope. Rope 567 suspends the top arc 406 of the C-shaped outer magnet 110, the upper magnetic guide tube 412, and the upper magnetic resistive body 415, respectively. It then passes through pulley block 570 and the side-fixed pulley 569 of the scaffold, bending and extending to the double-drum winch 562 on the lower left end pad 561 of the scaffold. On the sweeping bar 555 at the lower middle of the scaffold, two scaffold boards 556 are placed spaced apart. Each scaffold board 556 has four or more casters 551 on its underside, standing upright on the ground or base. 6. Support: Four or more second lifting rods 557 are installed on the bottom surface of each scaffold board 556; 3-4 jacks 558 are erected on the ground or base between two scaffold boards 556; when all jacks 558 are activated simultaneously to raise the lifting plate 559, the second lifting rods 557 on the scaffold board 556 replace the jacks 558 to support the lifting plate 559, and then the jacks 558 are removed; four or more casters 551 are installed on the bottom surface of the lifting plate 559; on the lifting plate 559... A bracket 564 is set in the middle of the bottom surface to support the midpoint of the bottom arc 401. A pair of diagonal braces 563 are set on the left and right sides facing each other, forming a crescent shape with rubber pads on the inner surface, to clamp and support the bottom arc 401. On the pad plate 561 at the lower right end of the scaffold, 2-3 second lifting rods 557 are set to support the lower magnetic tube 418 and the lower magnetic resisting body 420. On the left and right sides of the scaffold, 2 outriggers 554 are set on each side. The casters 551 on the left and right sides are equipped with triangular brackets to fix them to the ground or base.

[0083] Assume basic parameters:

[0084] like Figure 3 As shown, let the length of the top 101 of the box be a. 箱顶 302, width is b 箱顶 303, height is h 箱顶 304; the bottom of the box is 102mm long and the length is a.箱底 308, width is b 箱底 309, height is h 箱底 310; the length of the box cavity is a 箱腔 305, width is b 箱腔 306, height is h 箱腔 307. The length, width, and height of the top 101 and bottom 102 of the box are equal, and their length and width are equal to the length 305 and width 306 of the cavity 108.

[0085] like Figure 5 , 6 As shown, each C-shaped external magnet 110 is manufactured according to a uniform standard, is of equal size, has the same electromagnetic coil wound on it, is energized with the same direct current, and has equal magnetomotive force and magnetic reluctance. Assume that the cross-sectional radius of the top arc 406, bottom arc 401, column beam 404, two right-angle bends, and eight straight pipe sections 402 on each C-shaped external magnet is r0301, and the cross-section of the two square rods 413 is a square with a side length of a. 方杆 =2r0522, the bending radius of the top arc 406 and the bottom arc 401 is r. 弧曲 512, column-beam height is h 柱梁 507, the bending radius of the right-angle bend is r. 弯曲 520, each straight pipe section 402 is a positive threaded screw 410 or a negative threaded screw 411, and its length is L. 直管 =L 正 The tooth length is Lreverse (Lpositive is at position 505 in the diagram, Lreverse is at position 506 in the diagram), the length of each square rod is Lsquare523, and the radius of each positive and negative tooth nut is r. 正反螺 519. Length L 正反螺 518, each connector has a radius of r0301 and a length of L. 接管 506. The thickness of each coil bobbin is d. 骨筒 Each end plate has a thickness of d (504). 端板 The gap between the end plates of the frame in the middle of the top and bottom arcs is d. 端间 516.

[0086] Calculate the magnetic induction intensity B0 in cavity 108:

[0087] like Figure 9 As shown, let the magnetic flux in the cavity 108 be Φ0, the magnetic induction intensity be B0, and the magnetic reluctance be R. g The cross-sectional area is S 箱横 Calculate the magnetic flux, magnetomotive force, and magnetic reluctance in the magnetic circuit, referring to circuit calculation methods. For example... Figure 9 , 10As shown, let's take an example: Two pairs of connecting pipes are welded to the left and right sides of the top 101 and bottom 102 of the enclosure, connecting to two external magnets 110. Five pairs of connecting pipes are evenly welded to the front and rear sides of the middle section of the top 101 and bottom 102, connecting to five external magnets 110. The middle section of the enclosure 108 is evenly divided into six sections. The two pairs of external magnets 110 at the left end of the enclosure 108 are designated as the first column. Starting from the left end of the enclosure 108 and extending to the right, the first pair of external magnets 110 on the front and rear sides are designated as the second column, the second pair as the third column, the third pair as the fourth column, the fourth pair as the fifth column, and the fifth pair as the sixth column. The two pairs of external magnets 110 at the right end of the enclosure 108 are designated as the seventh column. Each pair of external magnets 110 is manufactured according to a uniform standard, with equal magnetomotive force and magnetic reluctance. The actual length division of the cavity 108 is not limited by the division method in this example; it can be less than 6 sections, or greater than 6 sections, or extended indefinitely. The number of pairs of external magnets 110 in the middle section increases accordingly, requiring the cavity 108 to be divided into n sections (n ​​is a positive integer).

[0088] like Figure 10 , 11 As shown, each row has two sets of external magnets 110, which are connected to the four sides of the top 101 and bottom 102 of the enclosure. A magnetic flux loop is formed through the top 101, the cavity 108, the bottom 102, and the external magnets 110. The magnetic circuit is as follows: Figure 12 As shown, the magnetic flux in the cavity 108 is Φ0581 and the magnetic reluctance is R. g 582. When each row of external magnets 110 is connected in parallel, it is equivalent to one set of external magnets 110. The equivalent magnetic circuit is as follows: Figure 13 As shown. The top 101 and bottom 102 of the enclosure are both made of soft magnetic materials with high permeability, such as permalloy; in the example, the middle section of the enclosure 108 is evenly divided into 6 sections, assuming each section is L0585 units long, as shown... Figure 11 As shown. The magnetic flux encounters equal magnetic resistance, denoted as R, as it passes through the top 101 or bottom 102 of each box. c 676; When the magnetic flux passes through the top 101 or bottom 102 of the box (section 0.5), the magnetic resistance encountered is 0.5R. c 675, such as Figure 12 As shown.

[0089] Because magnetic field lines always follow the path of least magnetic reluctance and greatest magnetic permeability, the magnetic field lines of each external magnet 110 will enter the cavity 108, contributing magnetic flux to the cavity 108. To analyze the magnetic flux density at various points within the cavity 108, 11 counting lines (counting lines 1-11) are selected as the focus of the study on the vertical plane of the cavity 108. The magnetic flux density at each counting line is calculated to provide a basis for comprehensively evaluating the magnetic flux density in the cavity 108. Assuming the magnetic flux density at counting lines 1, 2, and 11 is B... 01 583, B 02---B 011 .

[0090] Line 1: As Figure 10 As shown, with O 11 P 11 (601-611) to O 21 P 21 The middle line of (602-612) is line 1. Calculate the magnetic induction intensity B at this line. 01 583. For example... Figure 12 As shown, let the magnetic reluctance of the two external magnets 110 in the first column be R. 11 661, R 12 662, magnetomotive force is F 11 631, F 12 641; The magnetic reluctance of the two external magnets in the second column, 110, is R. 21 663, R 22 664, magnetomotive force is F 21 632, F 22 642; The magnetic reluctance of the second pair of external magnets in the third column is R. 31 665, R 32 666, magnetomotive force is F 31 633, F 32 643; The magnetic reluctance of the 2 external magnets in column 4, 110, is R. 41 667, R 42 668, magnetomotive force is F 41 634, F 42 644; The magnetic reluctance of the 2 external magnets in column 5 is R. 51 669, R 52 670, magnetomotive force is F 51 635, F 52 645; The magnetic reluctance of the 2nd pair of external magnets in column 6 is R. 61 671, R 62 672, magnetomotive force is F 61 636, F 62 646; The magnetic reluctance of the 2 external magnets in column 7 is R. 71 673, R 72 674, magnetomotive force is F 71 637, F 72 647. Because each external magnet 110 is manufactured according to a uniform standard, the resistance of each coil is equal, and the input DC current is the same, the magnetic reluctance and magnetomotive force of each external magnet 110 are equal, therefore:

[0091] R 11 =R 12 =R 21 =R 22 =R 31 =R 32=……=R 71 =R 72

[0092] F 11 =F 12 =F 21 =F 22 =F 31 =F 32 =……=F 71 =F 72

[0093] Figure 13 for Figure 12 The equivalent magnetic circuit diagram. For example... Figure 13 As shown, the equivalent magnetic reluctances of the external magnets 110 in columns 1, 2, 3, 4, 5, 6, and 7 to line 1 are R1691, R2692, R3693, R4694, R5695, R6696, and R7697, respectively, and their equivalent magnetomotive forces are F1681, F2682, F3683, F4684, F5685, F6686, and F7687, respectively. Referring to the methods for calculating resistance and voltage in parallel circuits, the magnetic reluctance and magnetomotive force of the parallel magnetic circuit in the diagram are calculated as follows:

[0094] R1 = 0.5R c +R 11 ∥R 12 +0.5R c =0.5R 11 +R c

[0095] R² = 0.5R c +R 21 ∥R 22 +0.5R c =0.5R 21 +R c =0.5R 11 +R c

[0096] R3 = 1.5R c +R 31 ∥R 32 +1.5R c =0.5R 31 +3R c =0.5R 11 +3R c

[0097] R4 = 2.5R c +R 41 ∥R 42 +2.5R c =0.5R 41 +5Rc =0.5R 11 +5R c

[0098] R5=3.5R c +R 51 ∥R 52 +3.5R c =0.5R 51 +7R c =0.5R 11 +7R c

[0099] R6=4.5R c +R 61 ∥R 62 +4.5R c =0.5R 61 +9R c =0.5R 11 +9R c

[0100] R7=5.5R c +R 71 ∥R 72 +5.5R c =0.5R 71 +11R c =0.5R 11 +11R c

[0101] ∵F1=F 11 ∥F 12 =F 11 F2=F 21 ∥F 22 =F 21 =F 11

[0102] F3=F 31 ∥F 32 =F 31 =F 11 F4=F 41 ∥F 42 =F 41 =F 11

[0103] F5=F 51 ∥F 52 =F 51 =F 11 F6=F 61 ∥F 62 =F 61 =F 11

[0104] F7=F71 ∥F 72 =F 71 =F 11

[0105] ∴F 11 =F 12 =F 21 =F 22 =F 31 =F 32 =……=F 71 =F 72 =F1

[0106] like Figure 13 As shown, the magnetic flux in the cavity 108 is Φ0581 and the magnetic reluctance is R. g 582, the magnetic flux of each branch is Φ1701, Φ2702, Φ3703, Φ4704, Φ5705, Φ6706, Φ7707, Φ8708, Φ9709, Φ 10 710, Φ 11 711, Φ 12 712. According to Kirchhoff's law of magnetic flux, we can obtain:

[0107] Φ0=Φ1+Φ2 (1)

[0108] Φ2=Φ3+Φ4; Φ4=Φ5+Φ6; Φ6=Φ7+Φ8

[0109] Φ8=Φ9+Φ 10 ;Φ 10 =Φ 11 +Φ 12

[0110] Φ1+Φ3+Φ5+Φ7+Φ9+Φ 11 +Φ 12 =Φ0 (2)

[0111] According to Kirchhoff's magnetic pressure law, we can obtain:

[0112] ∵Φ1R1-F1=Φ3R2-F2; F1=F2

[0113] ∴Φ1R1=Φ3R2∴Φ3=Φ1R1 / R2(3)

[0114] ∵Φ1R1-F1=Φ5R3-F3; F1=F3

[0115] ∴Φ1R1=Φ5R3∴Φ5=Φ1R1 / R3(4)

[0116] ∵Φ1R1-F1=Φ7R4-F4; F1=F4

[0117] ∴Φ1R1=Φ7R4∴Φ7=Φ1R1 / R4(5)

[0118] ∵Φ1R1-F1=Φ9R5-F5; F1=F5

[0119] ∴Φ1R1=Φ9R5∴Φ9=Φ1R1 / R5(6)

[0120] ∵Φ1R1-F1=Φ 11 R6-F6; F1=F6

[0121] Therefore, Φ1R1=Φ 11 R6∴Φ 11 =Φ1R1 / R6(7)

[0122] ∵Φ1R1-F1=Φ 12 R7-F7; F1=F7

[0123] Therefore, Φ1R1=Φ 12 R7∴Φ 12 =Φ1R1 / R7(8)

[0124] Substituting equations (3) to (8) into equation (2), we get:

[0125] Φ1+Φ1R1 / R2+Φ1R1 / R3+Φ1R1 / R4+Φ1R1 / R5+Φ1R1 / R6+Φ1R1 / R7=Φ0

[0126] Φ1R1(1 / R1+1 / R2+1 / R3+1 / R4+1 / R5+1 / R6+1 / R7)=Φ0(9)

[0127] According to Kirchhoff's magnetic pressure law, we can obtain:

[0128] F1=Φ0R g +Φ1R1 (10)

[0129] Combining equations (9) and (10), we can obtain:

[0130] (F1-Φ0R g )(1 / R1+1 / R2+1 / R3+1 / R4+1 / R5+1 / R6+1 / R7)=Φ0

[0131]

[0132] The length and width of the box cavity are a. 箱腔 305, b 箱腔 306, its cross-sectional area is: S 箱横 =a 箱腔 b 箱腔

[0133] Then the magnetic induction intensity B at line 1 01 583 is:

[0134]

[0135] Substituting the values ​​of R1691 to R7697 at this time into equation (12), we get:

[0136]

[0137] Referring to the calculation method of line 1, the following results can be obtained:

[0138] Line 2: with O 21 P 21 Line (602-612) is line 2. Calculate the magnetic induction intensity B at this line. 02 .

[0139]

[0140] Line 3: with O 21 P 21 (602-612)—O 31 P 31 The middle line of (603-613) is line 3. Calculate the magnetic induction intensity B at this line. 03 .

[0141]

[0142] Line 4: with O 31 P 31 Line (603-613) is line 4. Calculate the magnetic induction intensity B at this line. 04 .

[0143]

[0144] Line 5: with O 31 P 31 (603-613)—O 41 P 41 The middle line of (604-614) is line 5. Calculate the magnetic induction intensity B at this line. 05 .

[0145]

[0146]

[0147] Line 6: with O 41 P 41 Line (604-614) is line 6. Calculate the magnetic induction intensity B at this line. 06 .

[0148]

[0149] Line 7: with O 41 P 41 (604-614)—O 51 P 51 The middle line of (605-615) is line 7. Calculate the magnetic induction intensity B at this line. 07 .

[0150]

[0151] Line 8: with O 51 P 51 Line (605-615) is line 8. Calculate the magnetic induction intensity B at this line. 08 .

[0152]

[0153] Line 9: with O 51 P 51 (605-615)—O 61 P 61 The middle line of (606-616) is line 9. Calculate the magnetic induction intensity B at this line. 09 .

[0154]

[0155] Line 10: with O 61 P 61 Line (606-616) is line 10. Calculate the magnetic induction intensity B at this line. 010 .

[0156]

[0157] Line 11: with O 61 P 61 (606-616)—O 71 P 71 The middle line of (607-617) is line 11. Calculate the magnetic induction intensity B at this line. 011 .

[0158]

[0159] Expansion of the Magnetism Formula

[0160] The above example shows that when the left and right sides of the top 101 and bottom 102 of the box are each connected to 2 external magnets 110; the front and rear sides of the middle section of the top 101 and bottom 102 of the box are evenly connected to 5 external magnets 110; and the length of the box cavity 108 is divided into 6 sections, the magnetic induction intensity B0 of each measuring line conforms to formula (12).

[0161] Therefore, it can be deduced that: when the left and right sides of the top 101 and bottom 102 of the box are each connected to two external magnets 110; when the box cavity 108 extends infinitely, and the front and rear sides of the middle section of the top 101 and bottom 102 are evenly connected to (n-1) external magnets 110, and the length of the box cavity 108 is divided into n sections, then:

[0162] R 11 =R 12 =R 21 =R 22 =R 31 =R 32 =……=R (n+1)1 =R (n+1)2

[0163] F 11 =F 12 =F 21 =F 22 =F 31 =F 32 =……=F (n+1)1 =F (n+1)2 =F1

[0164] Formula (12) is extended as follows:

[0165]

[0166] Where n ≥ 1 and is a positive integer.

[0167] In the formula, B0 is the magnetic induction intensity at each meter line in the cavity 108. The magnetic induction intensity in the nearby area is also close to the value of B0. When the cavity 108 is extended significantly and n increases considerably, the calculation using formula (14) becomes quite complicated. To simplify the process, assuming the magnetic reluctance at a certain meter line x is Rx, when calculating B0 at that meter line, it is only necessary to consider the influence of the three pairs of external magnets 110 to the left and right of that meter line on it, while the magnetic permeability of the fourth, fifth, ... pairs of external magnets 110 to its left and right is... ...the magnetic permeability at the relative point of this line. It's too small to be considered significant.

[0168] This channel-type magnetic field generator has a cavity 108 that can be wide, narrow, high, low, and short, with a slightly curved length. When the top 101 and bottom 102 of the cavity become disc-shaped, or elliptical, trapezoidal, pentagonal, hexagonal, or other polygonal shapes, the cavity 108 correspondingly becomes a cylindrical, elliptical, trapezoidal, pentagonal, or hexagonal prism-shaped magnetic field space, and the generated magnetic induction intensity changes accordingly. Considering the needs of magnetohydrodynamic power generation, thermoelectric gas power generation, medical MRI, electromagnetic railguns, accelerators, and scientific experiments, and following the above device design method, a test device scheme for a channel-type magnetic field generator is proposed. Assuming some specific parameter values, the generated magnetic induction intensity is calculated. The magnetic field space is required to be relatively large, with a magnetic induction intensity not less than 4T. The device should be easy to operate and have low operating costs.

[0169] (I) Design of the experimental setup

[0170] like Figure 10 , 11 As shown, suppose a test apparatus has 5 pairs of external magnets 110 evenly arranged in the middle section of the chamber 108, divided into 6 sections. The top 101 and bottom 102 of the chamber are also divided into 6 sections. Assume that the length of each section is L0585 = 10m. Figure 3 , 4 As shown, let the length of the top of the box be 101, a. 箱顶 302. The bottom length of the box is a 箱底 308 is a 箱顶 =a 箱底 =6L0=60m, box top width b 101 箱顶 303, bottom width b 箱底 309 is b 箱顶 =b 箱底 = 1.6m, top of box is 101m high h 箱顶 304, bottom height 102 h 箱底 310 is h 箱顶 =h 箱底 =0.07m; Assume the cavity is 108m long, a 箱腔 305 is a 箱腔 =6L0=60m, box cavity width b 108 箱腔 306 is b 箱腔 = 1.6m, box cavity height 108h 箱腔 The variation range of 307 is [0.22m, 0.26m]. For example... Figure 6 As shown, the cross-sectional radius r0301 of the C-shaped external magnet 110 core, right-angle bend, straight pipe, and connecting pipe is r0 = 0.05m, and the diameter is D0517; the straight pipe is a positive threaded screw or a negative threaded screw, and its length is the same as the length L of a positive threaded screw. 正牙 505, reverse threaded screw length L 反牙 506, L 直管 =L 正牙=L 反牙 =0.05m; the connecting rod is usually a reverse threaded rod with a length of L. 接管 =L 反牙 =0.05m. Let the outer radius r of the hexagonal threaded nut be... 正反螺 519 is r 正反螺 =0.13m, length L 正反螺 518 is L 正反螺 =0.08m, wall thickness d 螺厚 =0.08m, side length a 螺边 =0.15m. The side length a of the cross-section of the square bar. 方杆 522 is a 方杆 =2r0=0.10m, length L of the square rod 方 523 is L 方杆 =0.16m. Assume the cross-sectional radius of the right-angle bend is r0 = 0.05m, and the bending radius is r. 弯曲 520, with a central axis length of L 弯头 521.

[0171] r 弯曲 =1.5D0=1.5×2×0.05=0.15(m)

[0172] L 弯头 =r 弯曲 π / 2=0.15×π / 2=0.236(m)(ⅱ1)

[0173] like Figure 6 As shown, assume that the top arc 406 and bottom arc 401 of the C-shaped outer magnet 110 are of equal size, and assume that its inner ring radius r 弧内 511 are all r 弧内 =1m, bending radius is r 弧曲 512, the outer ring radius is r 弧外 513; The length of the central axis of the top arc 406 and the bottom arc 401 is L. 弧轴 514. After the top arc 406, bottom arc 401, and column beam are assembled into coil frame 503, let the inner ring radius of frame 503 be r. 弧骨内 509, the outer ring radius of skeleton 503 is r 弧骨外 515, the inner ring arc length of the skeleton 503 is L. 弧骨内 510, the outer ring arc length of the skeleton 503 is L. 弧骨外 524. Let the thickness of the coil bobbin be d (503). 骨筒 =0.002m, end plate thickness 504 is d 端板 =0.002m, gap d between the 503 end plates of the middle frame of the top and bottom arcs. 端间 516 is d 端间 =0.03m. Let h be the height of the bottom surface of the lifting platform from the ground. 升降板 560 is h升降板 =0.4m, the height of the support body 109 is h 支撑 311.

[0174] r 弧曲 = r 弧内 + r0 = 1 + 0.05 = 1.05 (m)

[0175] r 弧外 = r 弧内 +2r0=1+2×0.05=1.1 (m)

[0176] r 弧骨内 = r 弧内 - d 骨筒 =1 - 0.002 = 0.998 (m)

[0177] r 弧骨外 =r 弧外 +d 骨筒 =1.1 + 0.002 = 1.102 (m)

[0178] L 弧轴 =r 弧曲 π = 1.05π ≈ 3.3 (m) (ii2)

[0179] L 弧骨内 =r 弧骨内 π = 0.998π ≈ 3.13 (m) (ii3)

[0180] L 弧骨外 =r 弧骨外 π = 1.102π ≈ 3.46 (m)

[0181] h 支撑 =r 弧骨外 +r 弯曲 +h 升降板 =1.102+0.15+0.4=1.652(m)(ⅱ4)

[0182] like Figure 6 As shown, let the column-beam height of the C-shaped external magnet 110 be h. 柱梁 507, has:

[0183] h 柱梁 =L 直管 +r 弯曲 +r0+h 箱腔 +r0+r 弯曲 +L 直管

[0184] Because the height h of the box cavity is 108 箱腔The variation range of 307 is [0.22m, 0.26m]. Three points are selected as research points, namely 0.22m, 0.24m, and 0.26m.

[0185] When h 箱腔1 When = 0.22m,

[0186] h 柱梁 =L 直管 +r 弯曲 +r0+h 箱腔1 +r0+r 弯曲 +L 直管

[0187] =0.05+0.15+0.05+0.22+0.05+0.15+0.5=0.72(m)(ⅱ5)

[0188] When h 箱腔2 When = 0.24m,

[0189] h 柱梁 =L 直管 +r 弯曲 +r0+h 箱腔2 +r0+r 弯曲 +L 直管

[0190] =0.05+0.15+0.05+0.24+0.05+0.15+0.05=0.74(m)(ⅱ6)

[0191] When h 箱腔3 When = 0.26m,

[0192] h 柱梁 =L 直管 +r 弯曲 +r0+h 箱腔3 +r0+r 弯曲 +L 直管

[0193] =0.05+0.15+0.05+0.26+0.05+0.15+0.05=0.76(m)(ⅱ7)

[0194] Determine the column beam height h based on the height variation of box cavity 108. 柱梁 507 ranges from [0.72m to 0.76m]. And h 柱梁 Once 507 is determined, it cannot be changed. The only way to adjust the gap at the joint is by rotating the positive and negative thread nuts, which in turn adjusts the spacing at the open end of the C-shaped outer magnet 110. The adjustment range is [-0.02m, +0.02m]. Therefore, let h... 柱梁=0.74m. When the height is shortened, it can be shortened by 0.02m, and the magnetic liquid can be squeezed out from the small hole on the side of the positive and negative thread nut; when the height is increased, it can be increased by 0.02m, and the magnetic liquid can be drawn in from the small hole on the side of the positive and negative thread nut to fill the gap. All magnetic resistive elements and magnetic resistive plates are solid permanent magnets, such as N40UH neodymium iron boron, with a remanence of 1.24~1.28T, an operating temperature ≤180℃, and a relative permeability of generally 1.05 at room temperature (see the "Magnetic Properties Table of Sintered Neodymium Iron Boron" online).

[0195] https: / / wenku.baidu.com / view / ec2b4ece700abb68a982fb59.html? _wkts_=1762502516567&bd Query=%E7%83%A7%E7%BB%93%E9%92%95%E9%93%81%E7%A1%BC%E7%A3%81%E6%80%A7%E8%83%BD%E8%A1%A8&needWelcomeRecommand=1

[0196] (II) Calculate the magnetic reluctance of each component

[0197] 1. Calculate the magnetic reluctance of the C-shaped external magnet 110:

[0198] The C-shaped external magnet 110 uses an electromagnetic coil. Its top arc, bottom arc, column beam, straight pipe, right-angle bend, square rod, connecting pipe, positive and negative threaded nuts, and screw are all solid soft magnetic materials, such as 1J86 permalloy, with a relative permeability of 200,000 and an actual permeability of 0.25 H / m (see online article "1J76-1J77-1J79-1J80-1J85-1J86 High Initial Permeability Soft Magnetic Alloys"). https: / / www.xxalloy.com / productinfo / 379635.html

[0199] Let the cross-sectional areas of the top arc, bottom arc, column beam, straight pipe, each right-angle bend, square rod, and connecting pipe be S respectively. 顶弧 S 底弧 S 柱梁 S 直管 S 弯头 S 方杆 S 接管 The magnetic reluctances are R 顶弧 R 底弧 R 柱梁 R 直管 R 弯头 R 方杆 R 接管 .

[0200] R 顶弧 =L 弧轴 / μ 顶弧 S 顶弧 = 3.3 / (0.25×π×0.05) 2 ) = 1681.5(H -1 (ii8)

[0201] R 底弧 =L 弧轴 / (μ 底弧 S 底弧 = 3.3 / (0.25×π×0.05) 2 ) = 1681.5(H -1 (ii9)

[0202] R 柱梁 =h 柱梁 / (μ 柱梁 S 柱梁 = 0.74 / (0.25×π×0.05) 2 )=377(H -1 (ii10)

[0203] R 直管 =L 直管 / (μ 直管 S 直管 = 0.05 / (0.25×π×0.05) 2 ) = 25.5(H -1 (ii11)

[0204] R 弯头 =L 弯头 / (μ 弯头 S 弯头 = 0.236 / (0.25×π×0.05) 2 ) = 120.3(H -1 (ii12)

[0205] R 方杆 =L 方杆 / (μ 方杆 S 方杆 )=0.16 / (0.25×0.1×0.1)=64(H -1 (ii13)

[0206] R 接管 =L 接管 / (μ 接管 S 接管 = 0.05 / (0.25×π×0.05) 2 ) = 25.5(H -1 (ii14)

[0207] Let the total magnetic reluctance of a C-shaped external magnet with a 110 core be R. C芯软 :

[0208] R C芯软 =R 顶弧 +R 底弧 +R 柱梁 +8R 直管 +2R 弯头 +2R 方杆 +2R 接管

[0209] =1681.5+1681.5+377+8×25.5+2×120.3+2×64+2×25.5=4363.6≈4364(H -1 (ii15)

[0210] 2. Calculate the magnetic reluctance of the magnetic fluid in the positive and negative thread nuts:

[0211] The plan is to inject ferromagnetic fluid into the nuts with both positive and negative threads for sealing. Research indicates that under a magnetic field, the relative permeability of ferromagnetic fluids is typically between 1000 and 100000 (see online article "What is the typical relative permeability of ferromagnetic fluids?", https: / / chat.baidu.com / search?). word=%E9%93%81%E7%A3%81%E6%B5%81%E4%BD%93%E7%9A%84%E7%9B%B8%E5%AF%B9%E7%A3%81%E5%AF%BC%E7%8E%87%E9%80%9A%E5% B8%B8%E4%B8%BA%E5%A4%9A%E5%B0%91&dyTabStr=MTIsMCwzLDEsMiwxMyw3LDYsNSw5&pd=csaitab&setype=csaitab&extParamsJso n=%7B%22enter_type%22%3A%22search_a_tab%22%2C%22sa%22%3A%22vs_tab%22%2C%22apageli d%22%3A%2214894688343325914687%22%2C%22ori_lid%22%3A%2214894688343325914687%22%7D

[0212] Assume its relative permeability is μ 铁流 =10000. Let h be the height of the ferrofluid that increases or decreases. 铁流 =0.02m, its cross-section is S 铁流 =S 直管 =π × 0.05 2 m 2 Let its changing magnetic reluctance be R. 铁流 .

[0213] R 铁流 =h 铁流 / (μ 铁流 μ0S 铁流 )=0.02 / (10000×4π×10 -7 ×π×0.05 2 ) = 203(H -1 )

[0214] It can be seen that R 铁流 <<R C芯软 Therefore, the change in magnetic reluctance R of the ferrofluid can be ignored. 铁流 The effect on the total magnetic reluctance of the C-shaped external magnet 110, i.e., assuming R C芯软 It remains unchanged.

[0215] 3. Calculate the magnetic reluctance of box top 101 and box bottom 102.

[0216] Both the top 101 and bottom 102 of the box are made of soft magnetic materials, such as 1J86 permalloy, and are of equal size. Let their cross-sectional areas be S. 箱横 The vertical cross-sectional area is S 箱竖 Because the magnetic lines of force generated by each external magnet 110 flow through the top 101 and bottom 102 of the box, the magnetic resistance encountered for each section of length L0 is denoted as R. c .

[0217] S 箱横 =a 箱顶 ×b 箱顶 =60 × 1.6 = 96 (m) 2 (ii16)

[0218] S 箱竖 =b 箱顶 ×h 箱顶 =1.6 × 0.07 = 0.112 (m) 2 )

[0219] R c =L0 / (μ 箱顶 S 箱竖 )=10 / (0.25×0.112)≈357(H -1 (ii17)4. Calculate the magnetic reluctance of the 108-cell cavity.

[0220] The cavity 108 is hollow, and its cross-sectional area is S. 箱腔 The magnetic reluctance is R g 582. Let a 箱腔 =a 箱顶 =6L0=60m, b 箱腔 =b 箱The top height is 1.6m. The height h of cavity 108 varies from [0.22m to 0.26m]. When h of cavity 1 = 0.22m, the magnetic reluctance is set to R. g1 When h 箱腔2 When the reluctance is 0.24m, let R be the magnetic resistance. g2 When h 箱腔3 When the reluctance is 0.26m, let R be the magnetic reluctance. g3 .

[0221] R g1 =h 箱腔1 / (μ0S 箱腔 )=0.22 / (4π×10 -7 (×60×1.6)=1825(H) -1 (ii18)

[0222] R g2 =h 箱腔2 / (μ0S 箱腔 )=0.24 / (4π×10 -7 ×60×1.6)=1990(H -1 (ii19)

[0223] R g3 =h 箱腔3 / (μ0S 箱腔 )=0.26 / (4π×10 -7 (×60×1.6)=2156(H) -1 (ii.20) (iii) Calculate the magnetomotive force:

[0224] The C-type external magnet 110 is proposed to have an inner diameter of ф. 内 1.56 mm, outer diameter ф 外 A coil wound with 1.64 mm enameled wire has a maximum current of 5.73 A and can be wound with 6.1 turns per centimeter (see the online "Enameled Wire Diameter and Current Comparison Table").

[0225] http: / / www.360doc.com / content / 23 / 0722 / 07 / 69232418_1089564202.shtml

[0226] The inner arc of both the top and bottom arc skeletons 503 is shorter than the outer arc. When winding the coil, the inner arc skeleton 503 line should be used as the reference. The top and bottom arcs are of equal size. Let L be the arc length that can be wound around the coil in each layer of skeleton 503. 弧骨绕 Each layer can have n turns of coil. 顶弧1 n 底弧1 The length of the coil that can be wound in each layer of the column-beam frame 503 is h. 柱梁绕 Each layer can have n turns of coil. 柱梁1Let n be the total number of turns that can be made around the top arc, bottom arc, and columns / beams at each level. C芯1 .

[0227] L 弧骨绕 =L 弧骨内 -4d 端板 -d 端间 =3.13-4×0.002-0.03=3.092(m)≈309(cm)

[0228] h 柱梁绕 =h 柱梁 -L 正牙 -L 正牙 -2d 端板 =0.74-0.05-0.05-2×0.002=0.636(m)≈63(cm)

[0229] n 顶弧1 =L 弧骨绕 ×6.1 (turns / cm) = 309 × 6.1 = 1884 (turns)

[0230] n 底弧1 =L 弧骨绕 ×6.1 (turns / cm) = 309 × 6.1 = 1884 (turns)

[0231] n 柱梁1 =h 柱梁绕 ×6.1 (turns / cm) = 63 × 6.1 = 384 (turns)

[0232] n C芯1 =n 顶弧1 +n 柱梁1 +n 底弧1 =1884+384+1884=4152(ii21)

[0233] Assume that the top arc, bottom arc, and column beam are all wound with 52 layers of coil, and the total number of turns is n. C芯52 :

[0234] n C芯52 =n C芯1 ×52=4152×52=215904(ⅱ22)

[0235] When a maximum current of 5.73A is passed through the coil, the resulting magnetomotive force is denoted as F. 外线磁 :

[0236] F 外线磁 =I max n C芯52 =5.73×215904≈1237130(A)(ii23)(iv)Calculate the magnetic induction intensity R0 in the box cavity 108

[0237] In formula (ii15), R C芯软 That is, R in formula (13) 11 In formula (ii23), F 外线磁 That is, F 11 , and F 11 =F1.

[0238] 1. Calculate the magnetic induction intensity B of the measuring line 1 in the cavity 108. 01 :

[0239] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0240] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (13) of line 1, we get:

[0241]

[0242] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0243] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (13) of line 1, we get:

[0244]

[0245] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0246] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (13) of line 1, we get:

[0247]

[0248] 2. Calculate the magnetic induction intensity B of the measuring line 2 in the cavity 108. 02 :

[0249] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0250] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (J2) for line 2, we get:

[0251] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0252] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (J2) for line 2, we get:

[0253] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0254] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (J2) for line 2, we get:

[0255] 3. Calculate the magnetic induction intensity B of the measuring line 3 in the cavity 108. 03 :

[0256] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0257] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (J3) for line 3, we get:

[0258] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0259] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (J3) for line 3, we get:

[0260] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0261] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (J3) for line 3, we get:

[0262] 4. Calculate the magnetic induction intensity B of the measuring line 4 in the cavity 108. 04 :

[0263] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0264] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (J4) for line 4, we get:

[0265] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0266] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (J4) for line 4, we get:

[0267] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0268] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (J4) for line 4, we get:

[0269] 5. Calculate the magnetic induction intensity B of the measuring line 5 in the cavity 108. 05 :

[0270] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0271] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (J5) for line 5, we get:

[0272] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0273] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (J5) for line 5, we get:

[0274] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0275] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (J5) for line 5, we get:

[0276] 6. Calculate the magnetic induction intensity B of the measuring line 6 in the cavity 108. 06 :

[0277] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0278] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (J6) for line 6, we get:

[0279] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0280] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (J6) for line 6, we get:

[0281] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0282] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (J6) for line 6, we get:

[0283] 7. Calculate the magnetic induction intensity B of the measuring line 7 in the box cavity 108. 07 :

[0284] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0285] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (J7) for line 7, we get:

[0286] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0287] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (J7) for line 7, we get:

[0288] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0289] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (J7) for line 7, we get:

[0290] 8. Calculate the magnetic induction intensity B of the measuring line 8 in the cavity 108. 08 :

[0291] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0292] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (J8) for line 8, we get:

[0293] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0294] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (J8) for line 8, we get:

[0295] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0296] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (J8) for line 8, we get:

[0297] 9. Calculate the magnetic induction intensity B of the measuring line 9 in the cavity 108. 09 :

[0298] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0299] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (J9) for line 9, we get:

[0300] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0301] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (J9) for line 9, we get:

[0302] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0303] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (J9) for line 9, we get:

[0304] 10. Calculate the magnetic induction intensity B of the measuring line 10 in the cavity 108. 010 :

[0305] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0306] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (J10) for line 10, we get:

[0307] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0308] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (J10) for line 10, we get:

[0309] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0310] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (J10) for line 10, we get:

[0311] 11. Calculate the magnetic induction intensity B of the measuring line 11 in the cavity 108. 011 :

[0312] (1) When h 箱腔1 When R = 0.22m, g1 =1825(H) -1 )

[0313] Substituting formulas (ii15), (ii16), (ii17), (ii18), and (ii23) into formula (J11) for line 11, we get:

[0314] (2) When h 箱腔2 When R = 0.24m, g2 =1990(H) -1 )

[0315] Substituting formulas (ii15), (ii16), (ii17), (ii19), and (ii23) into formula (J11) for line 11, we get:

[0316] (3) When h 箱腔3 When R = 0.26m, g3 =2156(H) -1 )

[0317] Substituting formulas (ii15), (ii16), (ii17), (ii20), and (ii23) into formula (J11) for line 11, we get:

[0318] 12. Summary table of magnetic induction intensity of various measuring lines at a height of 108 in the three types of boxes:

[0319]

[0320]

[0321] Summary: (1) The magnetic induction intensity values ​​of counting line 1 and counting line 11, counting line 2 and counting line 10, counting line 3 and counting line 9, counting line 4 and counting line 8, counting line 5 and counting line 7 are equal, and the magnetic induction intensity value of counting line 6 is the largest.

[0322] (2) When the height of the cavity 108 is 0.22m, 0.24m, and 0.26m, the average magnetic induction intensity B0 in the cavity 108 is 5.576T, 5.204T, and 4.877T, respectively. The magnetic induction intensity values ​​at the 11 counting lines in each group are relatively small and close to the average value. Therefore, it can be approximately considered that a uniform magnetic field is generated in the cavity 108.

[0323] Application Prospects: This magnetic field generating device uses a mobile scaffold to mount the external magnet 110, connecting the four sides of the box top 101 and box bottom 102. It is easy to assemble, and different sizes of box cavities 108 can be designed. The height is adjustable, and it can generate a large magnetic induction intensity. The external magnet 110 uses an electromagnetic coil, which is easy to dissipate heat and has low operating costs. It is suitable for a variety of magnetic field applications.

[0324] Example 1:

[0325] Material selection: The top of the box 101, bottom of the box 102, upper pad beam 103, lower pad beam 105, each external magnet 110 magnetic core, as well as straight tube 402, positive and negative threaded nuts 403, upper elbow 409, lower elbow 421, square rod 413, connecting pipe 205, convex plate, double groove plate 741, bolts, and screws are all made of high permeability soft magnetic materials, such as permalloy 1J86, 1J85, 1J80 type, etc., or new Fe75.5Co0.5Mo0.5Cu1 Nb1.5Si13B8 nanocrystalline alloy; each magnetic deflector and magnetic deflector component are made of strong permanent magnet materials, such as neodymium iron boron N40UH, N38EH, N38UH, N44SH type, etc., or neodymium magnesium alloy magnets, AlNiCo carbon, AlNiCo magnets, Samarium cobalt magnets, iron-nickel alloys, hard magnetic ferrites, etc. The spring 417 between the upper and lower magnetically resistive bodies, each of the first lifting rods 107 and the second lifting rod 557, are made of non-magnetic rigid materials, such as austenitic stainless steel. The upper middle beam 104, lower middle beam 106, and movable scaffolding ( Figure 8 The U-bolts 414, forked U-bolts 416, and washers 422 are made of non-magnetic rigid materials, such as austenitic stainless steel and aluminum alloy. The support body 109 is made of non-magnetic rigid materials, such as austenitic stainless steel, aluminum alloy, concrete, and brick wall.

[0326] Production method: First, produce the top 101 and bottom 102 of the box. For example... Figure 2 , 3 As shown, according to the experimental setup, a cuboid 60 meters long, 1.6 meters wide, and 0.07 meters thick will be constructed using soft magnetic material. A splicing method will be used to first construct two sets of small cuboids, each with five sections and each section 12 meters long. These will then be spliced ​​together to form two sets of cuboids 60 meters long, serving as the top (101) and bottom (102) of the enclosure, respectively. The small cuboids will be spliced ​​together, but the length of each section will not be equal to... Figure 11 L0585 in the figure can be slightly smaller or larger than L0 to avoid its joint becoming the welding point of pipe 205. For example... Figure 14As shown, there are three splicing methods: ① Concave-convex butt joint, the two ends of each small cuboid are respectively made into a first groove 721 and a first convex plate 722, and adjacent two sections can be joined concave-convexly, except for the first and last two sections, whose outward-facing ends are kept flat; two first screw holes 724 are drilled through both ends of each first groove 721 and first convex plate 722 to pass through the first bolt 723 and connect the first convex plate 722 and the first groove 721. Another screw hole is drilled between the two first screw holes of each first groove 721, which only passes through the top surface of the first groove to add the first magnetic liquid 726 and install the first screw 725. ② For the convex plate connection, the two ends of each small cuboid are made into second grooves 732, except for the first and last sections, whose outward-facing ends are left flat. A second convex plate 731 is added, which is a small cuboid with both ends fitting into the second grooves 732. Two second screw holes 736 are drilled through both ends of each second groove 732 and second convex plate 731 for the second bolts 733 to pass through and connect the second convex plate 731 and the second groove 732. An additional screw hole is drilled between the two second screw holes in each second groove 732, passing only through the top surface of the second groove 732, to add the second magnetic fluid 735 and install the second screw 734. One second convex plate 731 connects two cuboid sections; if n sections are to be connected, (n-1) convex plates are needed. ③ For double-groove plate connection, make third convex plates 742 at both ends of each cuboid section, except for the first and last sections, whose outward-facing ends are left flat; add a double-groove plate 741, with a third groove 744 at each end, which matches the third convex plate 742. Its length is short, and its width and height are equal to the width and height of each cuboid section; drill two third screw holes 743 through both ends of each third groove 744 and third convex plate 742 for the third bolt 745 to pass through and connect the third convex plate 742 and the third groove 744. Drill another screw hole between the two third screw holes of each third groove 744, which only passes through the top surface of the third groove, to add the third magnetic liquid 747 and install the third screw 746. One double-groove plate 741 connects two cuboid sections; if n sections are connected, (n-1) double-groove plates 741 are needed. Second, prepare auxiliary facilities for the box cavity 108. ① For example Figure 2 , 3As shown in Figure 4, upper pad beams 103 and lower pad beams 105 in the shape of right trapezoidal prisms are made using soft magnetic material. According to the splicing method, each upper pad beam 103 and lower pad beam 105 is made into a section, the length of each section being equal to the length of each small cuboid section of the box top 101 and box bottom 102. The upper pad beams 103 sections are installed on the front and rear edges of the top bottom surface of each small cuboid section of the box top 101 using welding, screwing, and other methods. The lower pad beams 105 sections are installed on the front and rear edges of the bottom bottom surface of each small cuboid section of the box bottom 102. If the top 101 and bottom 102 of the container are spliced ​​using double-groove plates 741, a small section of upper pad beam 103 needs to be installed on the front and rear edges of the upper bottom of the double-groove plate 741 connecting to the top 101, and a small section of lower pad beam 105 needs to be installed on the front and rear edges of the lower bottom of the double-groove plate 741 connecting to the bottom 102, to ensure that the edge height of the double-groove plate 741 is equal to the edge height of the top 101 and bottom 102 of the container. ② Use non-magnetic rigid materials to make slender cuboid upper beams 104 and lower beams 106. According to the splicing method, each upper beam 104 and lower beam 106 is made into a section. The length of each section is equal to the length of each small cuboid section of the box top 101 and box bottom 102. Using screws, adhesives, etc., each upper beam 104 section is installed on the front and rear center lines of the top bottom surface of each small cuboid section of the box top 101, and each lower beam 106 section is installed on the front and rear center lines of the bottom bottom surface of each small cuboid section of the box bottom 102. If the top 101 and bottom 102 of the box are spliced ​​using double-groove plates 741, a small section of upper middle beam 104 needs to be installed on the front and rear center lines of the upper bottom face of the double-groove plate 741 connecting to the top 101, and a small section of lower middle beam 106 needs to be installed on the front and rear center lines of the lower bottom face of the double-groove plate 741 connecting to the bottom 102, to ensure that the height of the center line of the double-groove plate 741 is equal to the height of the center line of the top 101 and bottom 102. ③ Based on the designed length of the box cavity 108, 14 connecting pipes 205 are made using soft magnetic material, are solid cylindrical, and are bolted and matched with positive and negative thread nuts 403. Thirdly, a mobile scaffold is constructed. For example... Figure 8As shown, 14 sets of mobile scaffolding are constructed using non-magnetic rigid materials. Each set has 8 vertical poles 550, 8 casters 551, 5 layers of ring beams 572, a large central space, and is equipped with 2 footboards 556, 1 lifting platform 559, 2 diagonal braces 563, 2 base plates 561, 1 double-drum winch 562, 2 pulley blocks 570, 1 jack 558, and 10-12 second lifting rods 557; each footboard 556 is placed... The sweeping rod 555 is fixed with bolts. Each of the scaffold boards 556 has four or more casters 551 on its underside, at an appropriate height so they can just touch the ground or base. The lifting platform 559 also has four or more casters 551 on its underside, at a lower height, but ensuring that the jacks 558 can be inserted into the underside of the lifting platform 559. The ring beams and inner beams at the middle and lower ends of the right side of the scaffold are made into buckles 553, which can be opened and closed to facilitate the entry and exit of the external magnet 110. Fourth, the external magnet 110 is manufactured. According to the experimental setup, 14 soft magnets are made using soft magnetic materials. First, fabricate the top arc 406, bottom arc 401, and column beam 404. Then, fabricate the straight pipe 402, upper elbow 409, lower elbow 421, square rod 413, and positive and negative thread nuts 403. Machine positive thread screws and negative thread screws on each connecting end and match the positive and negative thread nuts 403. Except for the middle frame 503 end plate gap 516 of the top arc 406 and bottom arc 401 where the hanging rope 571 and bracket 564 are installed, all other coil frames 503 are wound with multiple layers of coil. A thermally conductive silicone pad is placed under each layer of coils, and the gaps between the coils are filled with thermally conductive silicone to facilitate heat dissipation. Cooling equipment, such as fans, oil tanks, or water tanks, is then added to cool the energized coils using air cooling, oil cooling, or water cooling. After the coils are wound around the top arc 406, bottom arc 401, and column beam 404, a coil module is formed and hoisted onto the lifting plate 559. The magnetic cores are connected using positive and negative thread nuts 403, and then the enameled wires of the coil module are connected in series. Fifth, magnetic blocking plates are fabricated. According to the experimental setup, the top 101 and bottom 102 of the enclosure are divided into six sections, so permanent magnet materials are used to fabricate 12 horizontal magnetic blocking plates 201, 12 downward-folding magnetic blocking plates 202, and 12 upward-folding magnetic blocking plates 203. Each horizontal magnetic blocking plate 201 is rectangular, with its length and width equal to the length and width of each section of the box top 101 and box bottom 102, all with a length of L0585. A pair of hinges 206 are installed on the upper and lower edges of each of its front and rear sides. Each downward-folding magnetic blocking plate 202 and upward-folding magnetic blocking plate 203 is symmetrical and identical, with equal thickness and height. Each extends forward by half a section of thin plate, reducing its thickness to half that of the original plate. The thin plates overlap in a staggered manner. Since the downward-folding magnetic blocking plates 202 and upward-folding magnetic blocking plates 203 encounter the upper and lower connecting pipes when surrounding the front and rear sides of the box cavity 108, appropriate gaps are left on their sides to ensure the flaps can be opened. Each magnetic blocking plate is then magnetized to generate the required internal magnetic direction 208. After magnetization, a rubber sleeve 207 is wrapped around its outer surface. Sixth, the magnetic blocking body is manufactured.Using permanent magnet materials, a pair of magnet deflectors are made for each set of external magnets 110. The upper magnet deflector 415 includes an upper base 424 and an upper inclined deflector 425. The two are combined by attaching a right-angled triangular prism-shaped upper inclined deflector 425 to the upper bottom surface of the upper base 424 away from the cavity 108 by means of screws or welding. The lower magnet deflector 420 includes a lower base 426, a lower inclined deflector 427, and a baffle 428. The three are combined by attaching a right-angled triangular prism-shaped lower inclined deflector 427 to the lower bottom surface of the lower base 426 away from the cavity 108 by means of screws or welding. Then, a cuboid baffle 428 is attached to the upper bottom surface of the lower base 426 near the cavity 108 by means of screws or adhesive. The upper magnetic resistive element 415, the lower magnetic resistive element 420, and the baffle 428 are magnetized to generate the required internal magnetic direction 423. After magnetization, a rubber sleeve 207 is wrapped around their outer surface. Then, using two U-bolts 414 and one forked U-bolt 416, the upper magnetic resistive element 415 is tied to the lower magnetic tube 412, and the lower magnetic resistive element 420 is tied to the upper magnetic tube 418, with a washer 422 inserted in the middle. The bottom surface of the upper magnetic resistive element 415 and the top surface of the lower magnetic resistive element 420 are directly opposite each other, with a compression spring 417 inserted in the middle.

[0327] Instructions for use: First, set up the support structures 109. According to the experimental setup, place the support structures 109 longitudinally side by side on the ground or base, arranged like railway bridge piers. Designed to be 60 meters long with 10-meter intervals, erect 7 support structures 109. Second, vertically place multiple temporary lifting rods between the support structures 109. Then, place the horizontal magnetic plates 201 on the support structures 109 and the temporary lifting rods, connecting them left and right to form a 60-meter-long cuboid. Third, the small rectangular sections of the box bottom 102, which are equipped with the lower pad beam 105 and the lower middle beam 106, are hoisted onto the long horizontal magnetic plate 201. According to the splicing method, adjacent left and right sides are joined together. Then, starting from the two screw holes on the first, second, and third grooves of each small rectangular section, holes are drilled downwards to align with the holes, and the lower pad beam 105 and the horizontal magnetic plate 201 on the bottom surface of the small rectangular section are all drilled through. Then, the first bolt 723, the second bolt 733, and the third bolt 746 are passed through the deep screw holes and tightened. Thus, the small rectangular sections, the lower pad beam 105, and the horizontal magnetic plate 201 are vertically connected, and the small rectangular sections of the box bottom 102 are horizontally connected to form the box bottom 102. Then, inject the first magnetic liquid 726, the second magnetic liquid 735, and the third magnetic liquid 747 into the third screw hole on the first, second, and third grooves of each small cuboid, and screw on the first screw 725, the second screw 734, and the third screw 746 to seal the joint. Fourth, by using screws, adhesives, and other methods, multiple first lifting rods 107 are vertically fixed to the bottom surface of the box bottom 102. Then, the small rectangular sections of the box top 101, which are equipped with upper pad beams 103 and upper middle beams 104, are hoisted to the top of each first lifting rod 107 and aligned with each other. Starting from the two screw holes on the first, second, and third grooves of each small rectangular section, holes are drilled upwards to align with the holes and drill through the upper pad beams 103 and the horizontal magnetic plate 201 on the bottom surface of the small rectangular section. Then, the first, second, and third bolts are passed through the deep screw holes and tightened. Thus, the small rectangular sections, upper pad beams 103, and horizontal magnetic plate 201 are vertically connected, and the small rectangular sections of the box top 101 are horizontally connected to form the box top 101. Then, starting from the third screw hole on the first, second, and third grooves of each small cuboid, drill upwards through the transverse magnetic plate 201 to form a deep screw hole. Then, starting from above the transverse magnetic plate 201, along the deep screw hole, add the first magnetic liquid 726, the second magnetic liquid 735, and the third magnetic liquid 747, and screw on the first screw 725, the second screw 734, and the third screw 746 to seal the joint. After installation, remove the temporary lifting rod under the bottom 102 of the box. Fifth, weld two connecting pipes 205 to each of the left and right sides of the top 101 and the bottom 102 of the box. Then, according to the length of the box cavity 108, symmetrically and evenly weld five pairs of connecting pipes 205 at the same interval L0585 to the front and rear sides of the top 101 and the bottom 102 of the box. Each connecting pipe 205 is perpendicular to the side of the top 101 and the bottom 102 of the box and faces outwards horizontally.Sixth, install magnetic blocking plates on the top 101 and bottom 102 of the box. Using hinges 206, hinge a downward-folding magnetic blocking plate 202 to the front and rear sides of each horizontal magnetic blocking plate 201 on the top 101, and hinge an upward-folding magnetic blocking plate 203 to the front and rear sides of each horizontal magnetic blocking plate 201 on the bottom 102. Then, raise each upward-folding magnetic blocking plate 203 and lower each downward-folding magnetic blocking plate 202, with the thin plates overlapping, and then use bolts 204 to pass through the two thin plates. Thus, each pair of upward-folding magnetic blocking plates 203 and downward-folding magnetic blocking plates 202 is fixed to the vertical surface, and can only slide up and down. Seventh, equip the external magnet 110 with a magnetic blocking body. Two sets of U-bolts 414 and one set of forked U-bolts 416 are used to secure the upper magnetic resistive body 415 below the upper magnetic guide tube 412, and the lower magnetic resistive body 420 above the lower magnetic guide tube 418. A compression spring 417 is then inserted between the upper magnetic resistive body 415 and the lower magnetic resistive body 420. Each set of outer magnets 110 is equipped with one upper magnetic resistive body 415, one lower magnetic resistive body 420, and one compression spring 417, all according to the same standard. The eighth step is to install the outer magnets 110 into the mobile scaffolding. One set of external magnets 110, equipped with an upper magnetic deflector 415 and a lower magnetic deflector 420, is hoisted onto a lifting platform 559 and placed vertically. It is then fixed to the lifting platform 559 using a bracket 564 and a pair of diagonal braces 563. The movable scaffolding linkage 553 is then opened, and the footboards 556 on the sweeping rod 555 are removed. The lifting platform 559 is pushed into the center of the scaffolding, and then the linkage 553 is closed and tightened. Simultaneously, 3-4 jacks 558 are used to raise the lifting platform 559 to a suitable height. The footboards 556 are then installed onto the sweeping rod 555, with its casters 551 on the ground. The second lifting rod 557 replaces the jacks 558 to support the bottom surface of the lifting platform 559, and then the jacks 558 are removed. Finally, the external magnets 110 are connected to the top 101 and bottom 102 of the box. Based on the required magnetic field space size of the cavity 108, determine the distance between the top 101 and bottom 102 of the cavity, and adjust the height of the first lifting rod 107 of the cavity 108; then move each scaffold closer to the cavity 108, roughly aligning the open end of each C-shaped external magnet 110 with the connecting pipes 205 on the four sides of the top 101 and bottom 102 of the cavity; then insert the jack 558 under the lifting plate 559, fine-tune the height, and then start the winch 562 to raise the C-shaped external magnet 110 to the accurate height. First, align the lower magnetic conductor 418 with the connecting pipe 205 on the side of the box bottom 102, and screw on the positive and negative thread nuts 403; then rotate the positive and negative thread nuts 403 of the top arc 406 and column beam 404, upper elbow 409, and bottom arc 401 and column beam 404, lower elbow 421, so that the upper magnetic conductor 412 aligns with the connecting pipe 205 on the side of the box top 101, and screw on the positive and negative thread nuts 403, thus connecting the upper magnetic conductor 412, lower magnetic conductor 418 and connecting pipe 205. Then fine-tune the second lifting rod 557 and the top support lifting plate 559 on the scaffold board 556, and then remove the jack 558.Tenth, when it is necessary to adjust the magnetic field space height 307 of the cavity 108, firstly, disassemble the positive and negative thread nuts 403 connecting the upper magnetic tube 412 of the outer magnet 110 to the top of the cavity 101 and the lower magnetic tube 418 to the bottom of the cavity 102, disconnecting the connection. Then, according to the required height 307 of the cavity 108, readjust the height of the first lifting rod 107 of the cavity 108; then, finely adjust the second lifting rod 557, and realign the lower magnetic tube 418 with the bottom of the cavity 101. 2. The side connector 205 is then connected to the micro winch 562, which rotates the positive and negative thread nuts 403 of the top arc 406, the column beam 404, and the upper elbow 409, as well as the positive and negative thread nuts 403 of the bottom arc 401, the column beam 404, and the lower elbow 421, so that the upper magnetic tube 412 is re-aligned with the side connector 205 of the top 101 of the box. The positive and negative thread nuts 403 are screwed on, thus reconnecting the upper magnetic tube 412, the lower magnetic tube 418, and the connector 205. Eleventh, when installing the reverse thread nut 403, magnetic liquid 408 needs to be injected into the small hole. After the reverse thread nut 403 is screwed in, screw the screw 407 into the small hole to seal it. When disassembling the reverse thread nut 403, first unscrew the screw 407 from the small hole, connect it to the oil can, use a permanent magnet to approach the bottom of the oil can to attract the magnetic liquid 408 into the oil can, then screw the screw 407 into the small hole, and finally rotate to remove the reverse thread nut 403.

[0328] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A channel-type magnetic field generating device, characterized in that, include: A housing assembly includes a top and a bottom, which are spaced apart along the height direction. The top and bottom are made of magnetically conductive material. Around the circumference of the top and bottom, a plurality of connecting parts are spaced apart on the peripheral walls of the top and bottom. An external magnet is used to generate a magnetic field. Multiple external magnets are provided corresponding to the connecting part on the top of the box. Each external magnet includes a first segment, a second segment, and an adjustment component. The first segment is connected to the connecting part on the top of the box, and the second segment is connected to the connecting part on the bottom of the box. The adjustment component is connected to the first segment and the second segment and is used to adjust the distance between the first segment and the second segment along the height direction.

2. The channel-type magnetic field generator according to claim 1, characterized in that, Along the length of the housing assembly, a plurality of external magnets are spaced apart. Along the width of the housing assembly, two external magnets are provided. The two external magnets are spaced apart on both sides of the housing assembly, and a channel port for entering and exiting the housing assembly is formed between the two external magnets.

3. The channel-type magnetic field generator according to claim 1, characterized in that, It also includes a lifting assembly, which connects the top and bottom of the container and is used to adjust the distance between the top and bottom of the container along the height direction.

4. The channel-type magnetic field generator according to claim 1, characterized in that, It also includes two magnetic blocking components, each comprising a horizontal magnetic blocking plate and side magnetic blocking plates connected to both sides of the horizontal magnetic blocking plate. The two horizontal magnetic blocking plates are respectively disposed on opposite sides of the top and bottom of the box, and the side magnetic blocking plates of the two magnetic blocking components extend between the top and bottom of the box.

5. The channel-type magnetic field generator according to claim 1, characterized in that, The connecting part includes a connecting pipe, the first section being threadedly connected to the connecting pipe on the top of the box, and the second section being threadedly connected to the connecting pipe on the bottom of the box.

6. The channel-type magnetic field generator according to claim 1, characterized in that, The outer magnet forms an open end at one end connecting the top and bottom of the box. An upper magnetic resisting body is provided at the end of the first segment located at the open end, and a lower magnetic resisting body is provided at the end of the second segment located at the open end. The upper magnetic resisting body and the lower magnetic resisting body are disposed between the first segment and the second segment.

7. The channel-type magnetic field generating device according to claim 6, characterized in that, The magnetic field generated by the upper magnetic resistive body is directed toward the top of the box and tilted away from the outer magnet. The angle between the magnetic field direction of the upper magnetic resistive body and the horizontal line is α, which satisfies 40°≤α≤70°. The magnetic field generated by the lower magnetic resistive body is directed toward the bottom of the box and tilted away from the outer magnet. The angle between the magnetic field direction of the lower magnetic resistive body and the horizontal line is β, which satisfies -70°≤β≤-40°.

8. The channel-type magnetic field generator according to claim 1, characterized in that, The top of the container includes multiple top units that are sequentially spliced ​​together, and adjacent top units are detachably connected. The bottom of the container includes multiple bottom units that are sequentially spliced ​​together, and adjacent bottom units are detachably connected.

9. The channel-type magnetic field generator according to claim 1, characterized in that, The top and bottom of the box are respectively provided with pad beams on opposite sides.

10. The channel-type magnetic field generating device according to claim 1, characterized in that, It also includes a moving component, which includes: A suspension component for suspending and moving the external magnet; The lifting base includes a supporting end and a movable end, wherein the movable end is movably connected to the supporting end and is used to place the external magnet.

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