Uniform heating device of electric induction furnace

Abstract

The utility model discloses a uniform heating device of an electric induction furnace, and relates to the technical field of electric induction furnaces. The device comprises a base, the top end of the base is provided with a plurality of groups of mounting racks which are distributed in a central symmetry manner, and crucibles are arranged at the top end of the base and located between the mounting racks; a crucible is placed at the top end of a base and located between mounting frames, then a rotating handle is rotated to drive an extension rod and a worm to rotate, and a worm gear and a rotating disc are driven to rotate, so that a plurality of mounting frames are driven to move towards one side of the circle center of the mounting frames at the same time, and the mounting frames are used for constraining the crucible; when the induction coil is wound to the outer side of the mounting frame, the crucible is located in the center of the induction coil, so that heating can be more uniform, and the coil turn spacing of the induction coil is limited by utilizing the distance between the winding grooves, so that the coil turn spacing is consistent, and the heating efficiency is improved. And the problem of non-uniform magnetic field intensity distribution is avoided.

Description

Technical Field

[0001] This utility model relates to the field of induction furnace technology, specifically to a uniform heating device for an induction furnace. Background Technology

[0002] An induction furnace is a device that uses the principle of electromagnetic induction to heat metal. When alternating current passes through the furnace coil, an alternating magnetic field is generated, causing eddy currents to form inside the metal charge, which then heats up and melts it. Its core consists of an induction coil, a refractory lining, and a cooling system. It has advantages such as rapid heating (up to 1600℃ or higher), precise temperature control, and low energy consumption (thermal efficiency of 60%-75%), and is widely used in steel and non-ferrous metal smelting and precision casting.

[0003] However, traditional induction coils mostly use a bare copper tube spiral winding structure. When energized, adjacent coils generate Ampere force due to the same direction of current, causing the turn spacing to spontaneously shrink. This results in inconsistent coil turn spacing, causing uneven magnetic field strength distribution, which leads to temperature gradients on or inside the workpiece surface. Consequently, this can cause component segregation during metal melting or stress cracks during heat treatment. To address these issues, the inventors propose a uniform heating device for induction furnaces. Utility Model Content

[0004] To address the problem of inconsistent coil spacing in induction furnaces, the purpose of this invention is to provide a uniform heating device for induction furnaces.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a uniform heating device for an induction furnace, comprising a base, the top of the base being provided with multiple sets of mounting brackets arranged in a centrally symmetrical manner, a crucible being placed at the top of the base and between the mounting brackets, and winding grooves arranged on the side of the mounting brackets away from the center of the crucible, an induction coil being wound between the outer sides of the mounting brackets, the wire of the induction coil being placed inside the winding grooves, an installation groove being provided inside the base, an adjustment component being provided inside the installation groove, and a protective cover being fixedly provided at the top of the base and outside the crucible, with an observation window installed on the protective cover.

[0006] Preferably, the adjustment component includes a turntable, which is rotatably connected to the inside of the base. The turntable has centrally symmetrically distributed arc-shaped grooves. The bottom end of the mounting bracket is fixedly connected to a guide post, which is movably engaged in the arc-shaped groove.

[0007] Preferably, a worm gear is fixedly connected to the outer side of the turntable's rotating shaft, and two fixed plates are fixedly connected to the inside of the base near the worm gear. A worm is rotatably connected between the two fixed plates, and the worm meshes with the worm gear. An extension rod is fixedly connected to one end of the worm's rotating shaft, and the end of the extension rod away from the worm extends movably to the outer side of the base and is fixedly connected to a throttle handle.

[0008] Preferably, sliders are fixedly connected to both sides of the bottom of the mounting bracket, and a through groove corresponding to the number of mounting brackets is opened at the top of the base. The guide post is movably disposed in the through groove, and sliding grooves are opened on both sides of the through groove. The slider is slidably engaged in the sliding groove.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] By placing the crucible at the top of the base and between the mounting brackets, and then turning the handle, the extension rod and worm gear are rotated, which in turn rotates the worm wheel and turntable. This causes multiple mounting brackets to move simultaneously to one side of the center of the mounting brackets. The mounting brackets constrain the crucible, placing it in the center of the mounting brackets. When the induction coil is wound around the outside of the mounting brackets, the crucible is in the center of the induction coil, resulting in more uniform heating. Furthermore, the distance between the winding slots limits the coil turn spacing of the induction coil, ensuring a consistent coil turn spacing and preventing uneven magnetic field strength distribution. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a partial cross-sectional view of the present invention.

[0014] Figure 3 This is a schematic diagram of the partially disassembled structure of this utility model.

[0015] Figure 4 This is a schematic diagram of the structure of the adjustment component of this utility model.

[0016] In the diagram: 1. Base; 2. Mounting bracket; 3. Winding groove; 4. Crucible; 5. Mounting groove; 6. Turntable; 7. Arc groove; 8. Guide column; 9. Induction coil; 10. Fixing plate; 11. Worm gear; 12. Extension rod; 13. Throttle; 14. Worm wheel; 15. Through groove; 16. Slide groove; 17. Slider; 18. Protective cover; 19. Observation window. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example: Figure 1-4 As shown, this utility model provides a uniform heating device for an induction furnace, including a base 1. The top of the base 1 is provided with multiple sets of mounting brackets 2 arranged in a centrally symmetrical manner. A crucible 4 is placed at the top of the base 1 and between the mounting brackets 2. The mounting brackets 2 are provided with winding grooves 3 arranged in a row on the side away from the center of the crucible 4. An induction coil 9 is wound between the outer sides of the mounting brackets 2. The wire of the induction coil 9 is placed inside the winding groove 3. An installation groove 5 is provided inside the base 1. An adjustment component is provided inside the installation groove 5.

[0019] The adjustment assembly includes a turntable 6, which is rotatably connected inside the base 1. The turntable 6 has centrally symmetrically distributed arc-shaped grooves 7. The bottom end of the mounting bracket 2 is fixedly connected to a guide post 8, which is movably engaged in the arc-shaped groove 7.

[0020] By adopting the above technical solution, the rotating turntable 6 drives the arc groove 7 to rotate, and the arc groove 7 guides the guide column 8, thereby driving the guide column 8 and the mounting frame 2 to move to a side that is far away from or close to each other. When the crucible 4 is placed on the top of the base 1 and between the mounting frames 2, the synchronous movement between the mounting frames 2 makes the crucible 4 located at the center position between the mounting frames 2. Thus, when the induction coil 9 is wound around the outside of the mounting frame 2, the crucible 4 is located at the center position of the induction coil 9, so that the heating can be more uniform.

[0021] A worm gear 14 is fixedly connected to the outer side of the rotating shaft of the turntable 6. Two fixed plates 10 are fixedly connected to the inside of the base 1 near the worm gear 14. A worm 11 is rotatably connected between the two fixed plates 10, and the worm 11 meshes with the worm gear 14.

[0022] By adopting the above technical solution, the worm gear 11 is rotated, and the worm gear 11 meshes with the worm wheel 14, thereby driving the worm wheel 14 and the turntable 6 to rotate. This allows for the adjustment of the center distance between the mounting bracket 2 and the base 1. At the same time, the physical form of the worm gear 11 and the worm wheel 14 being self-locking in opposite directions enables the turntable 6 to fix the relative position of the turntable 6 and the base 1 when it rotates to a certain angle, thus improving the stability of the structure.

[0023] One end of the worm gear 11 shaft is fixedly connected to an extension rod 12. The end of the extension rod 12 away from the worm gear 11 extends movably to the outside of the base 1 and is fixedly connected to a throttle 13.

[0024] By adopting the above technical solution and setting the throttle 13, it is easier to rotate and adjust the worm gear 11.

[0025] Slider 17 is fixedly connected to both sides of the bottom of the mounting bracket 2. The top of the base 1 has a through groove 15 corresponding to the number of mounting brackets 2. The guide post 8 is movably disposed in the through groove 15. Slide grooves 16 are provided on both sides of the through groove 15. The slider 17 is slidably engaged in the slide groove 16.

[0026] By adopting the above technical solution, the cooperation between the slide groove 16 and the slider 17 facilitates the centripetal movement of the mounting frame 2.

[0027] A protective cover 18 is fixedly provided on the top of the base 1 and on the outside of the crucible 4, and an observation window 19 is provided on the protective cover 18.

[0028] By adopting the above technical solution, the protective cover 18 is set to protect the induction coil 9. At the same time, the observation window 19 is set to observe the usage status of the induction coil 9.

[0029] Working principle: When heating materials using this induction furnace, the crucible 4 is placed on the top of the base 1 and between the mounting brackets 2. Then, by turning the handle 13, the extension rod 12 and the worm gear 11 are rotated. The worm gear 11 is engaged with the worm wheel 14, which in turn drives the worm wheel 14 and the turntable 6 to rotate. The arc groove 7 guides the guide column 8, and the slide groove 16 guides the slider 17. This causes multiple mounting brackets 2 to move simultaneously to one side of the center of the mounting bracket 2. The mounting brackets 2 bind the crucible 4, so that the crucible 4 is located in the center of the mounting bracket 2.

[0030] Then, the induction coil 9 is wound into the winding groove 3 on the outside of the mounting bracket 2. At this time, the crucible 4 is also in the center of the induction coil 9, so that the heating can be more uniform. In addition, the distance between the winding grooves 3 is used to limit the coil turn spacing of the induction coil 9, so that the coil turn spacing is consistent and avoids the problem of uneven magnetic field strength distribution.

[0031] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An induction electric stove uniform heating device comprising a base (1), characterized in that: The top of the base (1) is provided with multiple sets of mounting brackets (2) arranged in a centrally symmetrical manner. A crucible (4) is placed at the top of the base (1) and between the mounting brackets (2). The mounting brackets (2) are provided with winding grooves (3) arranged on the side away from the center of the crucible (4). An induction coil (9) is wound between the outer sides of the mounting brackets (2). The wire of the induction coil (9) is placed inside the winding groove (3). The base (1) is provided with a mounting groove (5). An adjustment component is provided inside the mounting groove (5).

2. A uniform heating device for an induction cooker as claimed in claim 1, characterized in that, The adjustment assembly includes a turntable (6), which is rotatably connected to the inside of the base (1). The turntable (6) has centrally symmetrically distributed arc-shaped grooves (7). The bottom end of the mounting bracket (2) is fixedly connected to a guide post (8), which is movably engaged in the arc-shaped groove (7).

3. An inductive heating apparatus for use in an induction furnace as claimed in claim 2, wherein A worm gear (14) is fixedly connected to the outer side of the rotating shaft of the turntable (6). Two fixing plates (10) are fixedly connected to the inside of the base (1) near the worm gear (14). A worm (11) is rotatably connected between the two fixing plates (10). The worm (11) meshes with the worm gear (14).

4. An inductive heating apparatus for use in an induction furnace as claimed in claim 3, wherein One end of the worm gear (11) shaft is fixedly connected to an extension rod (12), and the end of the extension rod (12) away from the worm gear (11) extends movably to the outside of the base (1) and is fixedly connected to a throttle (13).

5. A uniform heating device for an induction cooker as claimed in claim 2, wherein, The mounting bracket (2) has sliders (17) fixedly connected to both sides of its bottom. The top of the base (1) has through slots (15) corresponding to the number of mounting brackets (2). The guide post (8) is movably disposed in the through slot (15). The through slot (15) has sliding grooves (16) on both sides. The slider (17) is slidably engaged in the sliding groove (16).

6. A uniform heating device for an induction cooker as defined in claim 1, wherein, A protective cover (18) is fixedly provided on the top of the base (1) and outside the crucible (4), and an observation window (19) is provided on the protective cover (18).

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