Editable multi-phase medium-frequency cored induction melting furnace device and method

Abstract

The invention discloses an editable multi-phase medium-frequency cored induction melting furnace device and method. The editable multi-phase medium-frequency cored induction melting furnace device comprises a furnace shell, a core inductor assembly coil and a U-shaped magnetic core, and an induction coil is a rectangular inner hole coil formed by winding a square copper tube. And the two induction rings sleeve the two sides of the U-shaped magnetic core to form an induction ring assembly. According to the induction coil, a magnetic field is concentrated on the surface of a molten metal body under the action of intermediate-frequency alternating current to form a strong eddy current and skin effect, so that the melting speed is increased. Meanwhile, a plurality of groups of induction coils are connected in series to serve as a single-phase medium-frequency cored induction furnace; the induction coil assemblies are divided into three groups and form a three-phase medium-frequency cored induction melting furnace with the three-phase medium-frequency power supply cabinet, and the medium-frequency power supply cabinet outputs three groups of same-phase medium-frequency currents in the melting stage to achieve normal melting. And the intermediate-frequency power supply cabinet adjusts three-phase intermediate-frequency current with a three-phase angle difference of 120 degrees to be connected with the three-phase cored induction furnace in the later stage of smelting, so that the direction of a magnetic field can be changed to realize forward and reverse electromagnetic stirring. The loss is reduced, the efficiency is improved, and obvious energy-saving and cost-reducing effects are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medium frequency induction melting, and in particular to an editable multi-phase medium frequency cored induction melting furnace device and method. Background Art

[0002] Induction melting typically utilizes single-phase, coreless induction furnaces. Due to the coreless magnetic induction process, the electrical and magnetic induction efficiencies are low, resulting in high energy consumption. Furthermore, single-phase induction furnaces lack magnetic field stirring, making them ineffective for melting certain demanding alloy metals. This has become a pressing challenge that must be addressed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide an editable multi-phase medium-frequency cored induction melting furnace device and method, which has the advantages of high efficiency and good melting effect for induction melting of various metals. In some usage scenarios, it is better than single-phase coreless induction melting and can effectively solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: An editable multi-phase medium frequency cored induction melting furnace device comprises a furnace shell, a core component coil, and a U-shaped magnetic core of the core component; the U-shaped magnetic core of the editable multi-phase medium frequency cored induction melting furnace device is stacked with 0.23mm thick oriented silicon steel sheets; the induction coil of the editable multi-phase medium frequency cored induction melting furnace device is wound into a rectangular inner hole coil using a square copper tube, which is then cast with epoxy resin using a profiled mold after insulation treatment; two induction coils are installed on both sides of a U-shaped magnetic core of the editable multi-phase medium frequency cored induction melting furnace device to form an assembly; the editable multi-phase medium frequency cored induction melting furnace device uses multiple groups of induction coil magnetic core assemblies to form a circle, with its U-shaped opening facing inward.

[0005] Preferably, the editable multi-phase medium frequency cored induction melting furnace device uses multiple groups of induction coil magnetic core components to form a circle, and the multiple groups of induction coils are connected in series to serve as a single-phase cored induction furnace.

[0006] Preferably, the editable multi-phase medium frequency cored induction melting furnace device is connected to a three-phase medium frequency power supply cabinet during the melting stage. The medium frequency power supply cabinet adjusts and outputs three groups of medium frequency currents with the same phase angle and is connected to the induction furnace to form three groups of single-phase cored induction melting furnaces.

[0007] Preferably, the editable multi-phase medium frequency cored induction melting furnace device is connected to a three-phase medium frequency power supply cabinet, and the medium frequency power supply cabinet outputs three-phase medium frequency currents with a phase angle difference of 120° connected to the induction furnace to form a three-phase medium frequency cored induction melting furnace with electromagnetic stirring function.

[0008] Preferably, the editable multi-phase medium frequency cored induction melting furnace device is connected to a three-phase medium frequency power supply cabinet during the heating stage. The medium frequency power supply cabinet changes the output phase angle of the three-phase medium frequency current and is connected to the induction furnace to form a three-phase medium frequency cored induction melting furnace, realizing forward and reverse electromagnetic stirring functions.

[0009] A method for preparing an editable multi-phase medium frequency cored induction melting furnace device is as follows: six groups of magnetic core inductor assemblies 3 are used to form a circle to form a single-phase cored medium frequency steel melting furnace with a rated capacity of 1T. The specific steps are as follows: (1) Connect six sets of inductor coils in series to form a single-phase induction coil; (2) Use six sets of magnetic core inductor components 3 to form a circle, with the U-shaped opening facing inward, and the back of the U-shaped and the six sets of columns corresponding to the furnace shell are tightened and fixed with screws; (3) The circular interior is lined with heat-resistant insulation and then rammed with composite refractory materials to form a crucible; (4) Equipped with a medium frequency power supply cabinet with a rated power of 550KW.

[0010] A method for preparing an editable multi-phase medium frequency cored induction melting furnace device is as follows: 12 groups of magnetic core inductor assemblies 3 are arranged in a circle to form a single-phase medium frequency cored steel melting furnace with a rated capacity of 3T. The specific steps are as follows: (1) Divide 12 groups of induction coils into three units, connect four groups of output terminals in series to form a single-phase induction coil, and three units form a three-phase medium-frequency induction furnace; (2) Use 12 sets of magnetic core sensor components to surround a U-shaped opening and press the top of the furnace cover up and down to fix it; (3) Use 12 sets of coil core inductor components to surround a U-shaped opening inward, and fix the U-shaped back and the furnace shell with 12 sets of columns corresponding to the screws; (4) The interior of the circle is lined with heat-resistant insulation and then rammed with composite refractory materials to form a crucible.

[0011] (5) Equipped with a three-phase medium frequency power supply cabinet with a rated power of 1600KW A method for preparing an editable multi-phase medium frequency cored induction melting furnace device is as follows: 18 groups of magnetic core inductor assemblies 3 are arranged in a circle to form a single-phase medium frequency cored steel melting furnace with a rated capacity of 6T. The specific steps are as follows: (1) Divide 18 groups of magnetic core inductor assemblies 3 into three units, connect each group of 6 output terminals in series to form a single-phase induction coil group, and the three units form a three-phase medium-frequency induction furnace; (2) Use 18 sets of coil core inductor components to form a circle, with the U-shaped opening facing inward, and the top end is pressed and fixed with the furnace cover plate 1; (3) Use 18 sets of magnetic core sensor components to form a circle, with the U-shaped opening facing inward, and the back of the U-shaped and the corresponding 18 sets of columns of the furnace shell are tightened and fixed with screws; (4) The circular interior is lined with heat-resistant insulation and then rammed with composite refractory materials to form a crucible; (5) Equipped with a three-phase medium frequency power supply cabinet with a rated power of 3000KW.

[0012] Compared with the prior art, the present invention has the following advantages: In the present invention, under the action of medium-frequency current, the magnetic field is concentrated on the surface of the molten metal body to form a strong eddy current and skin effect, which accelerates the melting speed. Heat-resistant and insulating materials are laid close to the circular inner wall, and the bottom and inner wall are rammed with refractory materials to form a crucible. The present invention also has the function of connecting multiple groups of induction coils in series as a single-phase medium-frequency cored induction furnace. Multiple induction coil assemblies can be divided into three groups, and together with a three-phase medium-frequency power supply cabinet, form a three-phase medium-frequency cored induction melting furnace. Connected to the three-phase medium-frequency power supply cabinet, the medium-frequency power supply cabinet outputs three groups of medium-frequency currents with the same phase to achieve normal melting during the melting stage. In the later stage of melting, the medium-frequency power supply cabinet adjusts the three-phase alternating current connected to the induction furnace with a three-phase angle difference of 120° to change the direction of the magnetic field to achieve forward and reverse electromagnetic stirring. The present invention also has multiple groups of cored induction structures, short magnetic circuits, low losses, high efficiency, and obvious energy-saving effects. It also has a three-phase electromagnetic stirring function, which improves the purity of the molten metal liquid. Since the cored induction melting furnace device is adjacent to the molten pool with a silicon steel sheet magnetic core, once the molten steel leaks, only the end of the magnetic core will be burned, and the induction coil will not be damaged. Compared with the traditional single-phase coreless induction furnace which often burns the induction coil when leaking, the maintenance cost is greatly reduced. Compared with the traditional coreless induction furnace with high loss, low efficiency and no stirring function, it has a greater improvement and has obvious energy-saving and cost-reduction effects.

[0013] The present invention provides an editable multi-phase medium frequency cored induction melting furnace device which uses multiple groups of cored induction coil components to work in combination to increase its magnetic induction intensity. When connected to a three-phase medium frequency power supply cabinet, it can realize single-phase and three-phase operation with the advantage of electromagnetic stirring. In some usage scenarios, it has better induction melting effects than a single-phase coreless induction furnace which is less efficient and does not have electromagnetic stirring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of an editable multi-phase medium-frequency cored induction melting furnace device of the present invention.

[0015] Figure 2 Schematic diagram of the structure of the core sensor assembly of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of a single / multi-phase cored induction furnace of the present invention.

[0017] In the figure: furnace cover 1, fixed top screw 2 of U-shaped magnetic core, core inductor assembly 3, insulating refractory liner 4, shell column 5, furnace bottom 6. DETAILED DESCRIPTION

[0018] The following embodiments are intended to further illustrate the present invention, but should not be construed as limiting the scope of protection of the present invention. Non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above-mentioned contents of the present invention still fall within the scope of protection of the present invention.

[0019] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the invention is to protect all technologies within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. to indicate directions or positional relationships, they only correspond to the drawings of this application and are for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0020] See also Figure 1 、 2 As shown in Figure 3, an editable multi-phase medium-frequency cored induction melting furnace device comprises a furnace cover 1, a fixed top screw 2 for a U-shaped magnetic core, a cored inductor assembly 3, an insulating refractory inner shell 4, housing columns 5, and a furnace bottom 6. Two induction coils 3.2 are placed on either side of a U-shaped magnetic core 3.1 to form a cored inductor assembly 3. The induction coils 3.2 of the cored inductor assembly 3 are square copper tubes wound into a rectangular inner-bore coil, which is subjected to high-temperature insulation treatment and then cast entirely with a contoured mold epoxy resin. The U-shaped magnetic core 3.1 of the cored inductor assembly 3 is made of stacked oriented silicon steel sheets.

[0021] An editable multi-phase medium-frequency cored induction melting furnace device comprises a plurality of induction coil core components forming a circle, wherein the U-shaped magnetic core 3.1 is opened inward.

[0022] Furthermore, an editable multi-phase medium frequency cored induction melting furnace device comprises a plurality of induction coil magnetic core cored inductor assemblies 3 forming a circle, and the plurality of induction coils can be connected in series as a single-phase cored induction furnace.

[0023] Furthermore, an editable multi-phase medium frequency cored induction melting furnace device includes a plurality of induction coil magnetic core cored inductor assemblies 3 forming a circle, and the plurality of induction coil assemblies 3 can be divided into three groups to form a three-phase induction cored melting furnace with a three-phase power supply cabinet.

[0024] A further editable multi-phase medium frequency cored induction melting furnace device includes a device connected to a three-phase medium frequency power supply cabinet during the melting stage. The medium frequency power supply cabinet adjusts three groups of medium frequency currents with the same phase angle and connects them to three groups of inductor components 3 to form three groups of single-phase medium frequency cored induction furnaces for melting.

[0025] A further editable multi-phase medium frequency cored induction melting furnace device includes a device connected to a three-phase medium frequency power supply cabinet during the late heating stage of melting. The medium frequency power supply cabinet outputs three-phase medium frequency currents with a phase angle difference of 120° and is connected to three groups of inductor components 3 to form a three-phase medium frequency cored induction furnace melting electromagnetic stirring.

[0026] Furthermore, an editable multi-phase medium frequency cored induction melting furnace device is provided, which is connected to a three-phase medium frequency power supply cabinet during the heating stage. The medium frequency power supply cabinet changes the output phase angle of the three-phase medium frequency current and is connected to three groups of inductor components 3 to form a three-phase medium frequency cored induction furnace for melting, thereby realizing forward and reverse electromagnetic stirring. Example 1:

[0027] An editable multi-phase medium frequency cored induction melting furnace device is provided, wherein six groups of magnetic core inductor assemblies 3 are arranged in a circle to form a medium frequency cored steel melting furnace with a rated capacity of 1T. The preparation method is as follows: (1) Connect six sets of inductor coils in series to form a single-phase induction coil; (2) Use six sets of magnetic core inductor components 3 to form a circle, with the U-shaped opening facing inward, and the back of the U-shaped and the six sets of columns corresponding to the furnace shell are tightened and fixed with screws; (3) The circular interior is lined with heat-resistant insulation and then rammed with composite refractory materials to form a crucible; (4) Equipped with a medium frequency power supply cabinet with a rated power of 550KW. Example 2:

[0028] An editable multi-phase medium frequency cored induction melting furnace device, which uses 12 groups of magnetic core inductor assemblies 3 to form a circle to form a three-phase medium frequency cored steel melting furnace with a rated capacity of 3T. The preparation method is as follows: (1) Divide 12 groups of induction coils into three units, connect four groups of output terminals in series to form a single-phase induction coil, and three units form a three-phase medium-frequency induction furnace; (2) Use 12 sets of magnetic core sensor components to surround a U-shaped opening and press the top of the furnace cover up and down to fix it; (3) Use 12 sets of coil core inductor components to surround a U-shaped opening inward, and fix the U-shaped back and the furnace shell with 12 sets of columns corresponding to the screws; (4) The circular interior is lined with heat-resistant insulation and then rammed with composite refractory materials to form a crucible; (5) Equipped with a three-phase medium frequency power supply cabinet with a rated power of 1600KW. Example 3:

[0029] An editable multi-phase medium frequency cored induction melting furnace device, which uses 18 groups of magnetic core inductor assemblies 3 to form a circle to form a three-phase medium frequency cored steel melting furnace with a rated capacity of 6T. The preparation method is as follows: (1) Divide 18 groups of magnetic core inductor assemblies 3 into three units, connect each group of 6 output terminals in series to form a single-phase induction coil group, and the three units form a three-phase induction furnace; (2) Use 18 sets of coil core inductor components to form a circle, with the U-shaped opening facing inward, and the top end is pressed and fixed with the furnace cover plate 1; (3) Use 18 sets of magnetic core sensor components to form a circle, with the U-shaped opening facing inward, and the back of the U-shaped and the corresponding 18 sets of columns of the furnace shell are tightened and fixed with screws; (4) The circular interior is lined with heat-resistant insulation and then rammed with composite refractory materials to form a crucible; (5) Equipped with a three-phase medium frequency power supply cabinet with a rated power of 3000KW.

[0030] Compare with the existing example 1 coreless medium frequency furnace.

[0031] Table 1 is a comparison table of the performance of the existing induction melting furnace and the performance of the cored induction melting furnace embodiments 1, 2, and 3; Table 1 shows the test performance of Examples 1 to 3. Compared with the prior art, it can be seen that Examples 1 to 3 not only have better performance, but also have obvious energy-saving effects that exceed traditional coreless induction furnaces.

[0032] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. An editable multi-phase medium frequency cored induction melting furnace device, characterized by: The furnace shell contains a core component coil and a core component U-shaped magnetic core; the core component coil is a plurality of groups of core inductor components, and each group of core inductor components is composed of two induction coils wrapped around the two sides of the core component U-shaped magnetic core; the core component U-shaped magnetic core of each group of the plurality of core inductor components forms a circle, and the core component U-shaped magnetic core is opened inward; the induction coils of each group of core inductor components are connected in series to form a single-phase medium-frequency cored induction furnace.

2. The editable multi-phase medium frequency cored induction melting furnace device according to claim 1, characterized in that: The core component of the core inductor assembly, a U-shaped magnetic core, is formed by stacking oriented silicon steel sheets with a thickness of 0.23 mm.

3. The editable multi-phase medium frequency cored induction melting furnace device according to claim 1, characterized in that: The induction coil of the core inductor assembly is a rectangular inner hole coil wound from a square copper tube. The coil of the core inductor assembly is subjected to high-temperature insulation treatment and is integrally cast with epoxy resin using a contoured mold.

4. An editable multi-phase medium frequency cored induction melting furnace device, characterized by: The invention comprises a plurality of cored inductor assemblies, each of which comprises two induction coils sleeved on both sides of a U-shaped magnetic core. The plurality of induction coil and U-shaped magnetic core assemblies form a circle, and the U-shaped magnetic core opening faces inward. The plurality of cored inductor assemblies are divided into three groups, which are respectively combined with a three-phase medium frequency power supply cabinet to form a three-phase medium frequency induction cored melting furnace.

5. The editable multi-phase medium frequency cored induction melting furnace device according to claim 4, characterized in that: The three-phase medium frequency induction cored melting furnace is connected to a three-phase medium frequency power supply cabinet during the melting stage. The three-phase medium frequency power supply cabinet adjusts three groups of medium frequency currents with the same phase angle, which are respectively connected to three groups of inductors to form three groups of single-phase medium frequency cored induction melting furnaces.

6. An editable multi-phase medium frequency cored induction melting furnace device, characterized by: The multiple groups of cored inductor assemblies are three groups of cored inductor assemblies, which are connected to a three-phase medium frequency power supply cabinet during the heating stage. The power supply cabinet changes the output phase angle of the three-phase medium frequency current and is connected to the three groups of inductors to form a three-phase medium frequency cored induction melting furnace, realizing forward and reverse electromagnetic stirring functions.

7. The editable multi-phase medium frequency cored induction melting furnace device according to claim 6, characterized in that: The three-phase medium frequency cored induction melting furnace is a three-phase medium frequency cored induction melting furnace formed by connecting a medium frequency power supply cabinet to output three-phase medium frequency current with a phase angle difference of 120° and three sets of inductors, and has an electromagnetic stirring function.

8. A method for preparing an editable multi-phase medium frequency cored induction melting furnace device is characterized by: Six sets of magnetic core inductor components are used to form a circle to form a medium frequency cored steel melting furnace with a rated capacity of 1T. The specific steps are as follows: (1) Six sets of inductor coils are connected in series to form an induction loop; (2) Use six sets of magnetic core sensor components to form a circle, with the U-shaped opening facing inward, and the six sets of columns corresponding to the U-shaped back and the furnace shell are tightened and fixed with screws; (3) The circular interior is lined with heat-resistant insulation and then rammed with composite refractory materials to form a crucible; (4) Equipped with a medium frequency power supply cabinet with a rated power of 550KW.

9. A method for preparing an editable multi-phase medium frequency cored induction melting furnace device is characterized by: Use 12 sets of magnetic core inductor components to form a circle to form a three-phase medium frequency cored steel melting furnace with a rated capacity of 3T. The specific steps are as follows: (1) Divide 12 sets of inductor coil assemblies into three units, connect four sets of output terminals in series to form a single-phase induction coil, and three units form a three-phase medium-frequency induction furnace; (2) Use 12 sets of magnetic core sensor components to surround a U-shaped opening and press the top of the furnace cover up and down to fix it; (3) Use 12 sets of coil core inductor components to surround a U-shaped opening inward, and fix the U-shaped back and the furnace shell with 12 sets of columns corresponding to the screws; (4) The circular interior is lined with heat-resistant insulation and then rammed with composite refractory materials to form a crucible; (5) Equipped with a three-phase medium frequency power supply cabinet with a rated power of 1600KW.

10. A method for preparing an editable multi-phase medium frequency cored induction melting furnace device is characterized by: Use 18 sets of magnetic core inductor components to form a circle to form a single-phase medium-frequency cored steel melting furnace with a rated capacity of 6T. The specific steps are as follows: (1) Divide 18 groups of magnetic core inductor assemblies 3 into three units, connect each group of 6 output terminals in series to form a single-phase induction coil group, and the three units form a three-phase induction furnace; (2) Use 18 sets of coil core inductor components to form a circle, with the U-shaped opening facing inward, and the top end is pressed and fixed with the furnace cover plate 1; (3) Use 18 sets of magnetic core sensor components to form a circle, with the U-shaped opening facing inward, and the back of the U-shaped and the corresponding 18 sets of columns of the furnace shell are tightened and fixed with screws; (4) The circular interior is lined with heat-resistant insulation and then rammed with composite refractory materials to form a crucible; (5) Equipped with a three-phase medium frequency power supply cabinet with a rated power of 3000KW.

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