Uniform heating device for medium-frequency electric furnace

Abstract

The utility model discloses a uniform heating device for a medium-frequency electric furnace, which belongs to the technical field of medium-frequency electric furnaces and comprises a furnace body, a first expanding ring is fixedly arranged at the top end of the furnace body, a base is arranged at the bottom end of the furnace body, a furnace shell is fixedly mounted between the bottom end of the first expanding ring and the top end of the base, and a backing ring is fixedly connected to the bottom end of the circumferential inner wall of the furnace shell. And a turntable is rotationally clamped in the backing ring. The turntable is rotationally clamped with the circumferential bottom end of the furnace shell, the first coil, the second coil and the third coil are arranged at the top end of the turntable, the first coil is positioned at the bottom end of the outer wall of the bottom end of the furnace body, and the second coil and the third coil are sleeved with the circumferential outer side of the furnace body, so that when the driving motor works, the worm drives the fluted disc to rotate; therefore, the problem that heating of the furnace body is delayed and uneven due to coil gaps is solved, and heating of the circumference of the furnace body is more even.

Description

Technical Field

[0001] This utility model relates to the field of medium-frequency electric furnace technology, and in particular to a uniform heating device for medium-frequency electric furnaces. Background Technology

[0002] An intermediate frequency furnace is a power supply device that converts 50Hz AC power into intermediate frequency (300Hz to 1000Hz) power. It rectifies three-phase AC power into DC power, then converts the DC power into adjustable intermediate frequency current, supplying this current to the capacitor and induction coil. This generates high-density magnetic lines of force in the induction coil, cutting the metal material held within and inducing large eddy currents within the metal. Intermediate frequency furnaces are widely used in the smelting of non-ferrous and ferrous metals, offering advantages such as high thermal efficiency, short smelting time, minimal alloy element loss, wide applicability to various materials, low environmental pollution, and precise control over the temperature and composition of the molten metal.

[0003] A search revealed a patent with publication number CN221898243U entitled "A Uniform Heating Type Medium-Frequency Furnace." The patent addresses the technical problem of generating a large amount of hot gas during the uniform heating process, which accumulates above the furnace, creating a hot environment and hindering effective heat collection and reuse. This negatively impacts practical use. The patent addresses this by using an electric cylinder to move a lifting frame, which in turn moves the furnace lid away from the furnace body, facilitating subsequent material input and heating. Under the stretching and guiding action of the telescopic rod, the tilting of the lifting frame during the lifting and lowering of the furnace cover is reduced. When heating materials, the furnace cover can be placed above the medium-frequency electric furnace body. The heat generated by heating the materials will continuously rise and enter the interior of the lifting pipe, and then enter the interior of the waste heat recovery box through the exhaust pipe. The operation of the exhaust fan in the exhaust pipe can guide the hot air into the waste heat recovery box quickly, which can complete the heat guidance and recovery of the material heating process. However, the following drawbacks still need to be addressed: the gap between the coils causes a delay in the heating of the furnace body, resulting in uneven heating. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a uniform heating device for medium-frequency electric furnaces.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A uniform heating device for a medium-frequency electric furnace includes a furnace body. A first expanding ring is fixedly disposed at the top of the furnace body, and a base is disposed at the bottom of the furnace body. A furnace shell is fixedly installed between the bottom of the first expanding ring and the top of the base. A support ring is fixedly connected to the bottom of the inner circumference of the furnace shell, and a turntable is rotatably engaged inside the support ring. A gear plate is fixedly installed at the bottom of the turntable. An integrated plate and a balance plate are fixedly installed on both sides of the top of the turntable, respectively. A first coil is fixedly connected to the bottom of the integrated plate, and a second coil and a third coil are fixedly connected to the middle and upper ends of the integrated plate, respectively. A drive motor is fixedly installed on the inner wall of the bottom of the base, and a worm gear is fixedly installed at the output end of the drive motor. The top circumference of the worm gear meshes with the bottom end of the gear plate.

[0007] Preferably, connecting columns are fixedly installed at the lower ends of both sides of the furnace shell, and a frame is rotatably arranged between the opposite ends of the two connecting columns.

[0008] Preferably, a second expansion ring is fixedly connected to the bottom end of the outer circumference of the furnace shell, and a plurality of mounting bolts at equal angles are fixedly installed between the top end of the second expansion ring and the top end of the base.

[0009] Preferably, the first coil is located at the bottom of the outer wall of the furnace body, and the second and third coils are sleeved on the outer circumference of the furnace body.

[0010] Preferably, the first coil is vortex-shaped, and the second and third coils are both helical.

[0011] Preferably, a connecting block is fixedly connected between the ends of the second coil and the third coil, and a rotating roller is rotatably mounted on the outside of the connecting block.

[0012] Preferably, the upper end of the inner circumference of the furnace shell is provided with a plurality of annular protrusions, and the circumference of the rotating roller is provided with a plurality of grooves, and the grooves match the annular protrusions.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The present invention proposes a uniform heating device for a medium-frequency electric furnace, which is rotatably engaged with the bottom circumference of the furnace shell by a turntable. The top of the turntable is provided with a first coil, a second coil, and a third coil. The first coil is located at the bottom of the outer wall of the furnace body. The second and third coils are sleeved with the outer circumference of the furnace body. When the drive motor is working, the worm gear drives the gear plate to rotate, which in turn drives the turntable and the first, second, and third coils to rotate around the circumference of the furnace body. This compensates for the problem of delayed and uneven heating of the furnace body caused by the gaps in the coils, and helps to make the circumference of the furnace body more uniformly heated.

[0015] 2. The present invention proposes a uniform heating device for a medium-frequency electric furnace, wherein a connecting block is fixedly connected between the ends of the second coil and the third coil, and a rotating roller is rotatably installed on the outside of the connecting block. Several annular protrusions on the upper end of the inner circumference of the furnace shell match several grooves on the circumference of the rotating roller, thereby further enhancing the stability of the turntable when rotating with the first coil, the second coil and the third coil, and ensuring uniform heating of the furnace body. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a uniform heating device for a medium-frequency electric furnace proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of a uniform heating device for a medium-frequency electric furnace proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of a uniform heating device for a medium-frequency electric furnace proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of a uniform heating device for a medium-frequency electric furnace proposed in this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of a uniform heating device for a medium-frequency electric furnace proposed in this utility model.

[0021] In the diagram: 1 Furnace body, 2 Furnace shell, 3 Frame, 4 Connecting column, 5 First expansion ring, 6 Second expansion ring, 7 Base, 8 Mounting bolt, 9 Turntable, 10 Gear disc, 11 Drive motor, 12 Worm gear, 13 Integrated board, 14 Balance plate, 15 First coil, 16 Second coil, 17 Third coil, 18 Connecting block, 19 Rotating roller, 20 Support ring, 21 Annular protrusion. Detailed Implementation

[0022] Reference Figure 1-5 A uniform heating device for a medium-frequency electric furnace includes a furnace body 1. A first expansion ring 5 is fixedly installed at the top of the furnace body 1, and a base 7 is installed at the bottom of the furnace body 1. A furnace shell 2 is fixedly installed between the bottom of the first expansion ring 5 and the top of the base 7. A support ring 20 is fixedly connected to the bottom of the inner circumference of the furnace shell 2, and a turntable 9 is rotatably engaged inside the support ring 20. A gear plate 10 is fixedly installed at the bottom of the turntable 9. An integrated plate 13 and a balance plate 14 are fixedly installed on both sides of the top of the turntable 9, respectively. A first coil 15 is fixedly connected to the bottom of the integrated plate 13. A second coil 16 and a third coil 17 are fixedly connected to the middle and upper ends of the integrated plate 13, respectively. A drive motor 11 is fixedly installed on the inner wall of the bottom of the base 7, and a worm gear 12 is fixedly installed at the output end of the drive motor 11. The top of the worm gear 12 meshes with the bottom of the gear plate 10.

[0023] In this utility model, connecting columns 4 are fixedly installed at the lower ends of both sides of the furnace shell 2, and a frame 3 is rotatably arranged between the opposite ends of the two connecting columns 4.

[0024] A second expansion ring 6 is fixedly connected to the bottom of the outer circumference of the furnace shell 2, and multiple mounting bolts 8 at equal angles are fixedly installed between the top of the second expansion ring 6 and the top of the base 7, which facilitates the quick installation and disassembly of the furnace shell 2 and the base 7, and makes it convenient to clean and maintain the first coil 15, the second coil 16 and the third coil 17.

[0025] The first coil 15 is located at the bottom of the outer wall of the bottom of the furnace body 1, and the second coil 16 and the third coil 17 are sleeved on the outer circumference of the furnace body 1.

[0026] The first coil 15 is vortex-shaped, while the second coil 16 and the third coil 17 are both spiral-shaped.

[0027] A connecting block 18 is fixedly connected between the ends of the second coil 16 and the third coil 17, and a rotating roller 19 is rotatably mounted on the outside of the connecting block 18.

[0028] The upper end of the inner circumference of the furnace shell 2 is provided with several annular protrusions 21, and the circumference of the rotating roller 19 is provided with several grooves, and the grooves match the annular protrusions 21, which further enhances the stability of the turntable 9 when rotating with the first coil 15, the second coil 16 and the third coil 17, and ensures that the furnace body 2 is heated evenly.

[0029] Working principle: The turntable 9 is rotated and engaged with the bottom of the furnace shell 2. The top of the turntable 9 is equipped with a first coil 15, a second coil 16 and a third coil 17. The first coil 15 is located at the bottom of the outer wall of the furnace body 1. The second coil 16 and the third coil 17 are sleeved with the outer side of the furnace body 1. When the drive motor 11 is working, the worm gear 12 drives the gear plate 10 to rotate, which in turn drives the turntable 9 and the first coil 15, the second coil 16 and the third coil 17 to rotate around the circumference of the furnace body 1. This compensates for the problem of delayed and uneven heating of the furnace body 1 caused by the gaps in the coils, and helps to make the circumference of the furnace body 1 more uniformly heated.

[0030] A connecting block 18 is fixedly connected between the ends of the second coil 16 and the third coil 17, and a rotating roller 19 is rotatably installed on the outside of the connecting block 18. Several annular protrusions 21 on the upper end of the inner circumference of the furnace shell 2 match several grooves on the circumference of the rotating roller 19, further enhancing the stability of the turntable 9 when rotating with the first coil 15, the second coil 16 and the third coil 17, and ensuring that the furnace body 2 is heated evenly.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A uniform heating device for a medium-frequency electric furnace, comprising a furnace body (1), wherein a first expansion ring (5) is fixedly disposed at the top of the furnace body (1), a base (7) is disposed at the bottom of the furnace body (1), and a furnace shell (2) is fixedly installed between the bottom of the first expansion ring (5) and the top of the base (7), characterized in that, A support ring (20) is fixedly connected to the bottom of the inner circumference of the furnace shell (2), and a turntable (9) is rotatably engaged inside the support ring (20). A gear plate (10) is fixedly installed at the bottom of the turntable (9). An integrated plate (13) and a balance plate (14) are fixedly installed on both sides of the top of the turntable (9). A first coil (15) is fixedly connected to the bottom of the integrated plate (13). A second coil (16) and a third coil (17) are fixedly connected to the middle and upper ends of the integrated plate (13). A drive motor (11) is fixedly installed on the inner wall of the bottom of the base (7), and a worm gear (12) is fixedly installed at the output end of the drive motor (11). The top circumference of the worm gear (12) meshes with the bottom end of the gear plate (10).

2. The uniform heating device for a medium-frequency electric furnace according to claim 1, characterized in that, Connecting columns (4) are fixedly installed on the lower ends of both sides of the furnace shell (2), and a frame (3) is rotatably arranged between the opposite ends of the two connecting columns (4).

3. The uniform heating device for a medium-frequency electric furnace according to claim 1, characterized in that, The bottom of the outer circumference of the furnace shell (2) is fixedly connected to a second expansion ring (6), and multiple mounting bolts (8) at equal angles are fixedly installed between the top of the second expansion ring (6) and the top of the base (7).

4. The uniform heating device for a medium-frequency electric furnace according to claim 1, characterized in that, The first coil (15) is located at the bottom of the outer wall of the furnace body (1), and the second coil (16) and the third coil (17) are sleeved on the outer circumference of the furnace body (1).

5. The uniform heating device for a medium-frequency electric furnace according to claim 4, characterized in that, The first coil (15) is vortex-shaped, while the second coil (16) and the third coil (17) are both spiral-shaped.

6. The uniform heating device for a medium-frequency electric furnace according to claim 1, characterized in that, A connecting block (18) is fixedly connected between the ends of the second coil (16) and the third coil (17), and a rotating roller (19) is rotatably installed on the outside of the connecting block (18).

7. A uniform heating device for a medium-frequency electric furnace according to claim 6, characterized in that, The upper end of the inner circumference of the furnace shell (2) is provided with several annular protrusions (21), and the circumference of the rotating roller (19) is provided with several grooves, and the grooves match the annular protrusions (21).

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