Laboratory magnetic field annealing furnace with rotating magnetic field

Abstract

The utility model belongs to the field of annealing furnaces, and relates to a laboratory magnetic field annealing furnace with a rotating magnetic field, which has the advantages of large magnetic field intensity and adjustable magnetic field rotating speed. The technical scheme comprises an inner shell, an electromagnet, a rotator and a motor. The inner shell is a columnar shell with an opening in one end, and a plurality of through grooves are formed in the side wall of the inner shell. The multiple electromagnets are arranged on the outer side wall of the inner shell, and iron cores of the electromagnets penetrate through the corresponding through grooves and extend into the inner shell. The rotator is arranged on one side of the inner shell, the output end of the rotator is electrically connected with the electromagnets, and the input end of the rotator is further electrically connected with a power source. The motor and the inner shell are relatively fixed, an output shaft of the motor is fixedly connected with the rotator, and the motor drives the rotator to operate, so that the electromagnets are sequentially connected with a circuit between the power supply clockwise or anticlockwise.

Description

Technical Field

[0001] The utility model belongs to the field of annealing furnaces and relates to a laboratory magnetic field annealing furnace with a rotating magnetic field. Background Art

[0002] The magnetic field annealing furnace uses the magnetic field to regulate the spin magnetic moment in the material to achieve the purpose of heat treatment.

[0003] During the annealing process, magnetic field reversals cause the material's magnetic moment to continuously change. These changes in magnetic moment alter the material's lattice structure. These changes in magnetic field affect both the material's temperature and microstructure, thus enabling different heat treatment effects.

[0004] Current technology in magnetic field rotation annealing furnaces uses a rotating frame to drive a magnetic block to rotate within the annealing furnace, creating a rotating magnetic field within the furnace, thereby interfering with the rotating magnetic field during material annealing. In the laboratory, increasing the magnetic field strength can be achieved by enlarging the permanent magnet. However, excessively large permanent magnets increase their size and mass, making it difficult to rotate the magnetic block and taking up a large amount of laboratory space. Utility Model Content

[0005] In order to overcome the defects in the above-mentioned related technologies, the utility model proposes a laboratory magnetic field annealing furnace with a rotating magnetic field, which has the advantages of high magnetic field intensity and adjustable magnetic field rotation speed.

[0006] In order to achieve the above technical objectives, the present invention provides a laboratory magnetic field annealing furnace with a rotating magnetic field, which comprises an inner shell, an electromagnet, a rotator and a motor. The inner shell is a cylindrical shell with an open end, and a plurality of through slots are provided on the side wall of the inner shell. The plurality of electromagnets are provided on the outer wall of the inner shell, and the iron cores of the electromagnets pass through the corresponding through slots and extend into the interior of the inner shell. The rotator is provided on one side of the inner shell, and the output end of the rotator is electrically connected to the plurality of electromagnets, and the input end of the rotator is also electrically connected to a power supply. The motor is relatively fixed to the inner shell, and the output shaft of the motor is fixedly connected to the rotator. The motor drives the rotator to operate, so that the plurality of electromagnets are connected to the circuit between the power supply in a clockwise or counterclockwise direction.

[0007] Preferably, the rotator comprises an outer ring, a rotating ring, and an inner ring. The outer ring is an annular member, and a plurality of first grooves are provided on the inner sidewall of the outer ring. A first carbon brush is provided in each first groove, and the first carbon brush is electrically connected to the corresponding electromagnet. The outer ring is also fixedly connected to the inner shell. The rotating ring is an annular member, and at least one conductive block is fixed to the rotating ring. The conductive block passes through the rotator and is flush with the outer and inner sidewalls of the rotating ring. The outer diameter of the rotating ring is adapted to the inner diameter of the outer ring. The rotating ring is movably arranged within the outer ring. When the rotating ring rotates within the outer ring, the conductive blocks are sequentially connected to the first carbon brushes. The rotator is fixedly connected to the output shaft of the motor. The inner ring is an annular member, and a plurality of second grooves are provided on the outer side wall of the inner ring. A second carbon brush is provided in each second groove. The second carbon brush is smoothly and fixedly connected to the outer side wall of the inner ring and has an arc surface. The line connecting each first carbon brush and the center line of the outer ring also passes through a second carbon brush. The outer diameter of the inner ring is adapted to the inner diameter of the rotating ring. When the rotating ring rotates, the conductive block is sequentially connected to the second carbon brush, and the second carbon brush is electrically connected to the power supply.

[0008] Preferably, the laboratory magnetic field annealing furnace with rotating magnetic field further comprises an outer shell. The outer shell is a cylindrical shell, which is arranged outside the inner shell and fixedly connected to the inner shell. The outer shell is also fixedly connected to the motor.

[0009] Preferably, the laboratory magnetic field annealing furnace with rotating magnetic field further includes a shielding layer, the shielding layer is provided on the outer wall of the inner shell, the coil of the electromagnet is provided outside the shielding layer, and the shielding layer is configured to reduce the electric field entering the interior of the inner shell.

[0010] Preferably, the plurality of first grooves is an even number. The winding directions of the electromagnet coils in two oppositely arranged first grooves are opposite.

[0011] Preferably, the laboratory magnetic field annealing furnace with rotating magnetic field further comprises a workpiece platform, the workpiece platform at least comprises a horizontal surface, and the workpiece platform is disposed inside the inner shell and remains relatively fixed.

[0012] Preferably, the laboratory magnetic field annealing furnace with rotating magnetic field further comprises a sealing end cover, the sealing end cover is adapted to an opening on one side of the inner shell, and the workpiece platform is fixedly connected to the sealing end cover.

[0013] The beneficial effects of the present invention are:

[0014] This utility model utilizes a rotator that, by driving a rotating ring, sequentially connects multiple electromagnets, thereby creating a rotating magnetic field within the annealing furnace. The current flowing through the electromagnets can be adjusted to adjust the intensity of the magnetic field, while the speed of the magnetic field within the annealing furnace can be adjusted by controlling the motor speed. Furthermore, the rotator is lightweight, requiring less motor power and providing a higher safety factor.

[0015] The utility model adopts a shielding layer, which is used to reduce the influence of the electric field formed by the coil of the electromagnet on the material to be processed in the annealing furnace, thereby reducing experimental errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a structural diagram of the inner shell and electromagnet of the utility model;

[0019] Figure 3 It is a cross-sectional view of the inner shell of the utility model;

[0020] Figure 4 This is a structural diagram of the rotator of the present utility model;

[0021] Figure 5 This is a structural diagram of the sealing end cover of the present utility model. DETAILED DESCRIPTION

[0022] To make the above-mentioned purposes, features, and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0025] like Figures 1 to 4 As shown, some embodiments of the present invention provide a laboratory magnetic field annealing furnace with a rotating magnetic field, comprising: an inner shell 1, an electromagnet 2, a rotator 3, and a motor 4. The inner shell 1 is a cylindrical shell with an open end, and a plurality of through-slots 11 are provided on the sidewall of the inner shell 1. Multiple electromagnets 2 are disposed on the outer sidewall of the inner shell 1, and the iron cores 21 of the electromagnets 2 extend through the corresponding through-slots 11 and into the interior of the inner shell 1. The rotator 3 is disposed on one side of the inner shell 1, and the output end of the rotator 3 is electrically connected to the multiple electromagnets 2, while the input end of the rotator 3 is also electrically connected to a power supply. The motor 4 is fixed relative to the inner shell 1, and the output shaft of the motor 4 is fixedly connected to the rotator 3. The motor 4 drives the rotator 3 to operate, causing the multiple electromagnets 2 to conduct electrical current to the power supply in a clockwise or counterclockwise direction.

[0026] In some examples, the inner shell 1 is a cylindrical cast iron shell with an open end and a closed end cap at the other end. Multiple through-slots 11 are evenly distributed along the sidewalls of the inner shell 1, and the length of the through-slots 11 is slightly less than the internal length of the inner shell 1. The electromagnet 2 includes an iron core 21 and a coil 22. An iron core 21 is disposed within each through-slot 11, and the iron core 21 and the through-slot 11 are sealed with an insulating material, such as insulating, high-temperature-resistant glue. The coil 22 is wound around the iron core 21 located outside the inner shell 1, and the iron core 21 can direct the magnetic field into the interior of the inner shell 1.

[0027] It is understood that the number of through slots 11 on the inner shell 1 is an even number, and the line connecting two opposing through slots 11 can intersect the centerline of the inner shell 1. The coils 22 of the electromagnets 2 fixed in the two opposing through slots 11 are wound in opposite directions, and the coils 22 of the electromagnets 2 fixed in the two opposing through slots 11 are arranged in parallel, that is, the electromagnets 2 fixed in the two opposing through slots 11 are connected to the power supply at the same time, and the magnetic poles of the iron core 21 located in the inner shell 1 are opposite.

[0028] Rotator 3 is disposed at the other end of inner housing 1. The coils 22 of the electromagnets 2 are electrically connected to rotator 3, and the power supply is also electrically connected to rotator 3. When rotator 3 is also fixedly connected to the output shaft of motor 4, the output shaft of motor 4 drives rotator 3 to operate, sequentially connecting the multiple electromagnets 2 arranged around inner housing 1 to the power supply, thereby forming a rotating magnetic field within inner housing 1.

[0029] The outer shell 5 of the motor 4 is relatively fixed to the inner shell 1. The motor 4 can be a stepper motor 4, and the motor 4 is driven by mains electricity or a DC24V power supply.

[0030] During use, the material to be processed is placed in the inner shell 1, and one end of the inner shell 1 is closed and the inner shell 1 is vacuum treated. The magnetic poles of the iron cores 21 of the two opposing electromagnets 2 are opposite, so that a magnetic field passing through the material to be processed is formed in the inner shell 1. The motor 4 is started to connect multiple electromagnets 2 to the power supply in turn, so that the magnetic field rotates and the annealing operation is carried out.

[0031] In some embodiments, the rotator 3 includes an outer ring 31, a rotating ring 32, and an inner ring 33. The outer ring 31 is an annular member having a plurality of first grooves disposed on its inner sidewall. Each first groove is provided with a first carbon brush 311, which is electrically connected to the corresponding electromagnet 2. The outer ring 31 is also fixedly connected to the inner housing 1. The rotating ring 32 is an annular member having at least one conductive block 321 fixed thereto. The conductive block 321 extends through the rotator 3 and is flush with both the outer and inner sidewalls of the rotating ring 32. The outer diameter of the rotating ring 32 matches the inner diameter of the outer ring 31. The rotating ring 32 is movably disposed within the outer ring 31. When the rotating ring 32 rotates within the outer ring 31, the conductive blocks 321 sequentially communicate with the first carbon brushes 311. The rotator 3 is fixedly connected to the output shaft of the motor 4. The inner ring 33 is an annular member, and a plurality of second grooves are provided on the outer wall of the inner ring 33. A second carbon brush 331 is provided in each second groove. The second carbon brush 331 is smoothly and fixedly connected to the outer wall of the inner ring 33 and has an arc surface. The line connecting each first carbon brush 311 and the center line of the outer ring 31 also passes through a second carbon brush 331. The outer diameter of the inner ring 33 is adapted to the inner diameter of the rotating ring 32. When the rotating ring 32 rotates, the conductive block 321 is sequentially connected to the second carbon brush 331, and the second carbon brush 331 is electrically connected to the power supply.

[0032] In some examples, the outer ring 31 can be made of an insulating material, such as ceramic or ABS plastic. The outer ring 31 is an annular member fixed to the other end of the inner housing 1. A plurality of first grooves are defined on the inner sidewall of the outer ring 31. The number of first grooves can match the number of through-slots 11. A first carbon brush 311 is disposed in each first groove, and each first carbon brush 311 is electrically connected to the corresponding coil 22 of the electromagnet 2.

[0033] The rotating ring 32 can be made of an insulating material, such as ceramic or ABS plastic. It is an annular member that is movably positioned within the outer ring 31. It is embedded with at least one conductive block 321, which extends through both the inner and outer sides of the rotating ring 32. The rotating ring 32 is fixedly connected to the output shaft of the motor 4.

[0034] The inner ring 33 can be made of an insulating material, such as ceramic or ABS plastic. A cylindrical protrusion is provided on the outer side of the other end of the inner shell 1, and the inner ring 33 is fixedly connected to the cylindrical protrusion. Multiple second grooves are provided on the outer side of the inner ring 33, each of which is equipped with a second carbon brush 331. Each second carbon brush 331 is electrically connected to the positive terminal of the power supply.

[0035] It is understood that the inner diameter of the rotating ring 32 matches the outer diameter of the inner ring 33, and the outer diameter of the rotating ring 32 matches the inner diameter of the outer diameter, so that the rotating ring 32 has a clearance fit with both the inner ring 33 and the outer ring 31. In addition, the positions of the first groove and the second groove are adapted to each other. That is, when the rotating ring 32 rotates, the conductive block 321 can simultaneously contact the corresponding first carbon brush 311 and second carbon brush 331, thus connecting the power supply, the second carbon brush 331, the conductor, the first carbon brush 311, and the electromagnet 2 to form a circuit.

[0036] A gap is set between the inner ring 33 and the other end of the inner shell 1, and the other end of the coil 22 can extend into the gap. The wire connecting the second carbon brush 331 and the power supply is set in the gap, and the wire in the gap can be electrically connected to the power supply.

[0037] For example, there may be two conductive blocks 321, which are arranged opposite each other. In this way, the rotating ring 32 can connect the two opposing electromagnets 2 to the power supply. When the rotating ring 32 is driven by the motor 4 to rotate, the opposing electromagnets 2 can be turned on in sequence, forming a rotating magnetic field in the inner shell 1.

[0038] Alternatively, there may be four conductive blocks 321 , which are evenly distributed, so that the four evenly distributed electromagnets 2 are connected to the power supply.

[0039] In some embodiments, the laboratory magnetic field annealing furnace with rotating magnetic field further includes an outer shell 5. The outer shell 5 is a cylindrical shell, which is arranged outside the inner shell 1 and fixedly connected to the inner shell 1. The outer shell 5 is also fixedly connected to the motor 4.

[0040] The outer shell 5 can be a cast iron cylindrical shell member, fixed to the outside of the inner shell 1, providing protection and insulation for the electromagnet 2. Furthermore, the outer shell 5 can protrude from the other end of the inner shell 1, and the rotator 3 can be disposed within the outer shell 5, outside the other end of the inner shell 1. Specifically, the outer ring 31 is fixedly connected to the interior of the outer shell 5, and the inner ring 33 is fixedly connected to the inner shell 1.

[0041] The housing 5 is also fixedly connected to the motor 4, and the output shaft of the motor 4 is fixedly connected to the rotating ring 32. To improve safety, the housing 5 can be grounded.

[0042] In some embodiments, the laboratory magnetic field annealing furnace with rotating magnetic field further includes a shielding layer 6, the shielding layer 6 is provided on the outer wall of the inner shell 1, the coil 22 of the electromagnet 2 is provided on the outside of the shielding layer 6, and the shielding layer 6 is configured to reduce the electric field entering the interior of the inner shell 1.

[0043] The shielding layer 6 can be a metal film, such as an aluminum film, and is disposed between the inner side and the coil 22. An insulating coating is applied between the shielding layer 6 and the inner shell 1. The shielding layer 6 is separated from the coil 22 and is grounded.

[0044] In some embodiments, the plurality of first grooves are an even number. The winding directions of the coils 22 of the electromagnets 2 in the two first grooves arranged opposite to each other are opposite.

[0045] In some embodiments, the laboratory magnetic field annealing furnace with rotating magnetic field further includes a workpiece platform 7 , which includes at least a horizontal surface. The workpiece platform 7 is disposed inside the inner shell 1 and remains relatively fixed.

[0046] The laboratory magnetic field annealing furnace with rotating magnetic field further includes a sealing end cover 8 , which is adapted to an opening on one side of the inner shell 1 , and the workpiece platform 7 is fixedly connected to the sealing end cover 8 .

[0047] The sealing end cover 8 is a cover body adapted to the opening at one end of the inner shell 1. A workpiece platform 7 is provided on the sealing end cover 8, and the workpiece to be processed can be placed on the workpiece platform 7. It can be understood that the workpiece platform 7 can be in the same plane as the center line of the inner shell 1 in the inner shell 1, so that the magnetic field can pass through the workpiece to be processed.

[0048] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0049] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A laboratory magnetic field annealing furnace with rotating magnetic field, characterized in that: include: An inner shell, wherein the inner shell is a cylindrical shell with one end open, and a plurality of through slots are provided on the side wall of the inner shell; Electromagnets, wherein a plurality of the electromagnets are disposed on the outer wall of the inner shell, and the iron cores of the electromagnets pass through the corresponding through slots and extend into the interior of the inner shell; a rotator, wherein the rotator is disposed on one side of the inner shell, and an output end of the rotator is electrically connected to the plurality of electromagnets, and an input end of the rotator is also electrically connected to a power source; The motor is fixed relative to the inner shell, and the motor output shaft is fixedly connected to the rotator. The motor drives the rotator to operate, so that the multiple electromagnets are connected to the circuit between the power supply in a clockwise or counterclockwise direction.

2. The laboratory magnetic field annealing furnace with rotating magnetic field according to claim 1, characterized in that: The rotator comprises: An outer ring, the outer ring being an annular member, having a plurality of first grooves provided on an inner side wall thereof, each of the first grooves being provided with a first carbon brush, the first carbon brush being electrically connected to a corresponding electromagnet, and the outer ring being fixedly connected to the inner housing; A rotating ring, which is an annular member and has at least one conductive block fixed thereto. The conductive block passes through the rotator and is flush with the outer and inner sidewalls of the rotating ring. The outer diameter of the rotating ring is adapted to the inner diameter of the outer ring. The rotating ring is movably disposed within the outer ring. When the rotating ring rotates within the outer ring, the conductive block is sequentially connected to the first carbon brush. The rotator is fixedly connected to the output shaft of the motor. The inner ring is an annular member, and a plurality of second grooves are provided on the outer wall of the inner ring. A second carbon brush is provided in each second groove. The second carbon brush is smoothly and fixedly connected to the outer wall of the inner ring and has an arc surface. The line connecting each first carbon brush and the center line of the outer ring also passes through a second carbon brush. The outer diameter of the inner ring is adapted to the inner diameter of the rotating ring. When the rotating ring rotates, the conductive block is sequentially connected to the second carbon brush, and the second carbon brush is electrically connected to the power supply.

3. The laboratory magnetic field annealing furnace with rotating magnetic field according to claim 2, characterized in that: The laboratory magnetic field annealing furnace with rotating magnetic field further includes a shell; The outer shell is a cylindrical shell, which is arranged outside the inner shell and fixedly connected to the inner shell. The outer shell is also fixedly connected to the motor.

4. The laboratory magnetic field annealing furnace with rotating magnetic field according to claim 3, characterized in that: The laboratory magnetic field annealing furnace with rotating magnetic field further includes a shielding layer. The shielding layer is provided on the outer wall of the inner shell. The coil of the electromagnet is provided outside the shielding layer. The shielding layer is configured to reduce the electric field from entering the inner shell.

5. The laboratory magnetic field annealing furnace with rotating magnetic field according to claim 4, characterized in that: The plurality of first grooves are an even number; The winding directions of the electromagnet coils in the two first grooves arranged opposite to each other are opposite.

6. The laboratory magnetic field annealing furnace with rotating magnetic field according to claim 5, characterized in that: The laboratory magnetic field annealing furnace with rotating magnetic field further includes a workpiece platform, which includes at least a horizontal surface. The workpiece platform is arranged inside the inner shell and remains relatively fixed.

7. The laboratory magnetic field annealing furnace with rotating magnetic field according to claim 6, characterized in that: The laboratory magnetic field annealing furnace with rotating magnetic field further comprises a sealing end cover, which is adapted to an opening on one side of the inner shell, and the workpiece platform is fixedly connected to the sealing end cover.

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