A multi-mode electromagnetic stirring device

Abstract

This utility model discloses a multi-mode electromagnetic stirring device, comprising a traveling wave magnetic field generator group, a rotating magnetic field generator, and a housing assembly. The traveling wave magnetic field generator group and the rotating magnetic field generator are arranged axially within the housing assembly. The multi-mode electromagnetic stirring device is installed outside the liquid metal to be stirred. An alternating current of a certain form is supplied to the traveling wave magnetic field generator group by an external power source, generating a traveling wave magnetic field within the multi-mode electromagnetic stirring device, thereby producing an axial force on the liquid metal. An alternating current of a certain form is supplied to the rotating magnetic field generator, generating a rotating magnetic field within the multi-mode electromagnetic stirring device, thereby producing a rotational force on the liquid metal. An alternating current of a certain form is supplied to the traveling wave magnetic field generator group and the rotating magnetic field generator respectively by an external power source, simultaneously generating a traveling wave magnetic field and a rotating magnetic field within the multi-mode electromagnetic stirring device, thereby producing a spiral stirring force on the liquid metal.

Description

Technical Field

[0001] This utility model relates to the technical field of electromagnetic stirring, and more specifically, to a multi-mode electromagnetic stirring device. Background Technology

[0002] Due to the widespread application of high-strength alloy steel and high-performance alloy materials, steel mills, non-ferrous metal plants, and research institutions are committed to developing lightweight, high-hardness, and high-performance alloy materials. In order to ensure the uniformity of alloy material composition, improve the equiaxed crystal structure of alloy materials, and reduce the center segregation of alloy materials, the existing conventional electromagnetic stirring can no longer meet the process requirements. Therefore, we need to develop electromagnetic stirring with stronger functions to meet market demands.

[0003] Currently, in the continuous casting (or semi-continuous casting) process of square and round billets in the field of iron and steel metallurgy and smelting, electromagnetic stirring in the crystallization zone, secondary cooling zone, and solidification end is widely used. Its typical magnetic field form is a rotating magnetic field. By using electromagnetic stirring to control the solidification process of the billet, it is possible to achieve certain effects on improving the surface and internal quality of the billet. However, due to the single magnetic field form, it is difficult to achieve ideal metallurgical effects for some high-requirement alloy materials. Research and technical personnel are exploring solutions. Therefore, the present invention proposes a technical solution of a multi-mode electromagnetic stirring device. Utility Model Content

[0004] In view of the above-mentioned technical problems in related technologies, this utility model provides a multi-mode electromagnetic stirring device that can solve the above problems.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows: A multi-mode electromagnetic stirring device includes a housing assembly comprising an inner cylinder and an outer cylinder. A magnetic field generator mounting space is provided between the inner cylinder and the outer cylinder. A traveling wave magnetic field generator group and a rotating magnetic field generator are arranged axially within the magnetic field generator mounting space, with either the traveling wave magnetic field generator group or the rotating magnetic field generator positioned in front. The traveling wave magnetic field generator group comprises N traveling wave magnetic field generators, where N is a natural number greater than or equal to 1. Each traveling wave magnetic field generator includes a traveling wave iron core with a traveling wave coil wound on it. The rotating magnetic field generator includes a rotating iron core with a rotating coil wound on it. An electrical connection box for supplying power to the traveling wave magnetic field generator group and the rotating magnetic field generator is provided on the outer side of the housing assembly. A coolant connection pipe communicating with the magnetic field generator mounting space is also provided on the outer side of the housing assembly.

[0006] Furthermore, the inner cylinder and the outer cylinder are respectively connected to a front cover plate and a rear cover plate on their front and rear sides, and the magnetic field generator installation space is a closed space enclosed by the front cover plate, the rear cover plate, the inner cylinder and the outer cylinder.

[0007] Furthermore, the number of electrical connection boxes is one or more, and the coolant connection pipe includes a coolant inlet pipe and a coolant outlet pipe, which are located at the front and rear ends of the housing assembly, respectively.

[0008] Furthermore, the electrical connection box is used to connect to an external power source, and the coolant connection pipe is connected to an external coolant circulation unit.

[0009] Furthermore, the end faces of the inner cylinder and the outer cylinder are circular, polygonal, or irregular in shape.

[0010] Furthermore, the traveling wave core has a strip structure, and the traveling wave core includes several core laminations A stacked together. Each side of the core lamination A is provided with a core pressure plate A, and the bolt assembly A passes through the core pressure plate A to lock the core lamination A. The traveling wave coil is wound on the traveling wave core, and the number of traveling wave coils on each traveling wave magnetic field generator is a multiple of 2 or 3.

[0011] Furthermore, the rotating iron core has a ring structure, and the rotating iron core includes several iron core laminations B stacked together. Each side of the iron core lamination B is provided with an iron core pressure plate B. The bolt assembly B passes through the iron core pressure plate B to lock the iron core laminations B. A rotating coil is wound on the rotating iron core, and the number of the rotating coils is a multiple of 2 or 3.

[0012] The beneficial effects of this invention are as follows: A multi-mode electromagnetic stirring device is installed outside the liquid metal. An alternating current (2-phase or 3-phase) of a certain form is supplied to the traveling wave magnetic field generator group within the device via an external power supply. This generates a traveling wave magnetic field within the multi-mode electromagnetic stirring device, thereby producing an axial force on the liquid metal. The magnitude and direction of this force can be adjusted via the power supply. Similarly, an alternating current (2-phase or 3-phase) of a certain form is supplied to the rotating magnetic field generator within the device. This generates a rotating magnetic field within the multi-mode electromagnetic stirring device, thereby producing a rotational force on the liquid metal. The magnitude and direction of this force can be adjusted via the power supply. Furthermore, by supplying alternating current (2-phase or 3-phase) of a certain form to both the traveling wave magnetic field generator group and the rotating magnetic field generator via an external power supply, both traveling wave magnetic fields and rotating magnetic fields can be generated simultaneously within the multi-mode electromagnetic stirring device. This generates a spiral stirring force on the liquid metal, and the magnitude and direction of this stirring force can be adjusted via the power supply. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of a multi-mode electromagnetic stirring device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the housing assembly described in an embodiment of the present utility model; Figure 3 This is the radial cross-section of the traveling wave magnetic field generator assembly described in this embodiment of the invention. Figure 1 ; Figure 4 This is the radial cross-section of the traveling wave magnetic field generator assembly described in this embodiment of the invention. Figure 2 ; Figure 5 This is a side view of the traveling wave magnetic field generator described in this embodiment of the present invention; Figure 6 This is a top view of the traveling wave magnetic field generator described in this embodiment of the present invention; Figure 7 This is a side view of the rotating magnetic field generator described in this embodiment of the invention. Figure 1 ; Figure 8 This is a side view of the rotating magnetic field generator described in this embodiment of the invention. Figure 2 ; Figure 9 This is an axial cross-sectional view of the rotating magnetic field generator described in this embodiment of the present invention; Figure 10 This is an application diagram of a multi-mode electromagnetic stirring device described in an embodiment of this utility model.

[0016] In the picture: 1. Traveling wave magnetic field generator assembly; 2. Rotating magnetic field generator; 3. Shell assembly; 4. Continuously cast billet; 11. Traveling wave magnetic field generator; 111. Traveling wave iron core; 112. Traveling wave coil; 111-1. Iron core lamination A; 111-2. Iron core pressure plate A; 21. Rotating iron core; 22. Rotating coil; 21-1. Iron core lamination B; 21-2. Iron core pressure plate B; 31. Inner cylinder; 32. Outer cylinder; 33. Front cover plate; 34. Rear cover plate; 35. Electrical connection box; 36. Coolant connection pipe. 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0018] like Figure 1-10 As shown, this utility model discloses a multi-mode electromagnetic stirring device, comprising three parts: a traveling wave magnetic field generator group 1, a rotating magnetic field generator 2, and a housing assembly 3. The traveling wave magnetic field generator group 1 and the rotating magnetic field generator 2 are arranged axially within the housing assembly 3, with either the traveling wave magnetic field generator group 1 or the rotating magnetic field generator 2 positioned in front. The traveling wave magnetic field generator group 1 consists of N traveling wave magnetic field generators 11, where N is a natural number greater than or equal to 1. An external power supply is connected through an electrical connection box 35, and circulating coolant is connected through a coolant connection pipe 36. When a certain form of alternating current is applied to the traveling wave magnetic field generator group 1, a traveling wave magnetic field can be formed in the multi-mode electromagnetic stirring device, which will cause traveling wave stirring of the liquid metal inside. When a certain form of alternating current is applied to the rotating magnetic field generator 2, a rotating magnetic field can be formed in the multi-mode electromagnetic stirring device, which will cause rotating stirring of the liquid metal inside. When a certain form of alternating current is applied to both the traveling wave magnetic field generator group 1 and the rotating magnetic field generator 2 at the same time, two modes of magnetic fields can be formed in the multi-mode electromagnetic stirring device, which will cause spiral stirring of the liquid metal inside.

[0019] In one specific embodiment of this utility model, such as Figure 10 As shown, the multi-mode electromagnetic stirring device is installed in the secondary cooling zone or at the end of solidification of the continuous casting machine. The continuously cast billet 4 passes through the multi-mode electromagnetic stirring device. After a certain form of alternating current is applied to the traveling wave magnetic field generator group 1, a traveling wave magnetic field can be formed in the multi-mode electromagnetic stirring device, which forms a traveling wave stirring effect on the unsolidified molten steel in the continuously cast billet 4. After a certain form of alternating current is applied to the rotating magnetic field generator 2, a rotating magnetic field can be formed in the multi-mode electromagnetic stirring device, which forms a rotating stirring effect on the unsolidified molten steel in the continuously cast billet 4. When a certain form of alternating current is applied to both the traveling wave magnetic field generator group 1 and the rotating magnetic field generator 2 at the same time, two modes of magnetic fields can be formed in the multi-mode electromagnetic stirring device, which forms a spiral stirring effect on the unsolidified molten steel in the continuously cast billet 4. The multi-mode stirring can more effectively improve the flow of liquid metal, increase the feeding force, ensure the uniformity of billet composition, improve equiaxed crystals, reduce center segregation, alleviate center porosity and shrinkage cavities, and improve the internal quality of the billet.

[0020] In one specific embodiment of this utility model, such as Figure 2As shown, the housing assembly 3 includes an inner cylinder 31, an outer cylinder 32, a front cover plate 33, a rear cover plate 34, an electrical connection box 35, and a coolant connection pipe 36. The electrical connection box 35 is used for connecting to an external power source, and one or more such boxes are provided. The coolant connection pipe 36 is used for connecting circulating coolant and is connected to the coolant circulation unit. Each coolant connection pipe 36 has one inlet and one outlet as a group, and one or more groups are provided.

[0021] In one specific embodiment of this utility model, such as Figure 3 As shown, the traveling wave magnetic field generator group 1 consists of 6 traveling wave magnetic field generators 11, arranged between the inner cylinder 31 and the outer cylinder 32. The end faces of the inner cylinder 31 and the outer cylinder 32 are circular. The magnetic field generated by each traveling wave magnetic field generator 11 moves along the axial direction. After passing a certain form of alternating current through the traveling wave magnetic field generator group 1, a traveling wave magnetic field moving along the axial direction is formed in the multi-mode electromagnetic stirring device, which forms an axial traveling wave stirring of the liquid metal inside.

[0022] In one specific embodiment of this utility model, such as Figure 4 As shown, the traveling wave magnetic field generator group 1 consists of two traveling wave magnetic field generators 11, symmetrically arranged between the inner cylinder 31 and the outer cylinder 32. The end face of the inner cylinder 31 is square, and the end face of the outer cylinder 32 is octagonal. The magnetic field generated by each traveling wave magnetic field generator 11 moves along the axial direction. After passing a certain form of alternating current through the traveling wave magnetic field generator group 1, a traveling wave magnetic field moving along the axial direction is formed in the multi-mode electromagnetic stirring device, which forms an axial traveling wave stirring of the liquid metal inside.

[0023] In one specific embodiment of this utility model, such as Figure 5 , Figure 6 As shown, the traveling wave magnetic field generator 11 consists of a traveling wave core 111 and a traveling wave coil 112. The traveling wave core 111 is composed of core laminations A 111-1 and core pressure plates A 111-2, and the traveling wave coil 112 is wound on the traveling wave core 111. The number of traveling wave coils 112 on each traveling wave magnetic field generator 11 is a multiple of 2 or 3. Figure 6 There are 6 traveling wave coils 112.

[0024] In one specific embodiment of this utility model, such as Figure 7 As shown, the rotating magnetic field generator 2 has a ring-shaped structure, consisting of a rotating iron core 21 and rotating coils 22. The rotating coils 22 are wound on the rotating iron core 21, and the number of rotating coils 22 is a multiple of 2 or 3. Figure 7 There are 6 rotating coils 22 in the middle. After a 3-phase alternating current is applied to the rotating magnetic field generator 2, a rotating magnetic field perpendicular to the axis is formed in the multi-mode electromagnetic stirring device, which causes the liquid metal inside to be rotated and stirred.

[0025] In one specific embodiment of this utility model, such as Figure 8 As shown, the end face of the rotating magnetic field generator 2 has an octagonal structure, and the rotating coils 22 are wound on the rotating iron core 21. The number of rotating coils 22 is a multiple of 2 or 3. Figure 8 There are four rotating coils 22. After two-phase orthogonal alternating currents are applied to the rotating magnetic field generator 2, a rotating magnetic field is formed in the multi-mode electromagnetic stirring device, which causes the liquid metal inside to be rotated and stirred.

[0026] In one specific embodiment of this utility model, such as Figure 9 As shown, the rotating magnetic field generator 2 consists of a rotating iron core 21 and a rotating coil 22. The rotating iron core 21 is composed of iron core laminations B 21-1 and iron core pressure plates B 21-2, and the rotating coil 22 is wound on the rotating iron core 21.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-mode electromagnetic stirring device, characterized by, The system includes a housing assembly (3), which includes an inner cylinder (31) and an outer cylinder (32). A magnetic field generator mounting space is provided between the inner cylinder (31) and the outer cylinder (32). A traveling wave magnetic field generator group (1) and a rotating magnetic field generator (2) are arranged axially in the magnetic field generator mounting space. The traveling wave magnetic field generator group (1) includes N traveling wave magnetic field generators (11), where N is a natural number greater than or equal to 1. Each traveling wave magnetic field generator (11) includes a traveling wave iron core (11). 1) A traveling wave coil (112) is wound on the traveling wave core (111), and the rotating magnetic field generator (2) includes a rotating core (21) on which a rotating coil (22) is wound. An electrical connection box (35) for supplying power to the traveling wave magnetic field generator group (1) and the rotating magnetic field generator (2) is provided on the outside of the housing assembly (3). A coolant connection pipe (36) communicating with the installation space of the magnetic field generator is also provided on the outside of the housing assembly (3).

2. A multi-mode electromagnetic stirring device according to claim 1, wherein The inner cylinder (31) and the outer cylinder (32) are respectively connected to the front cover plate (33) and the rear cover plate (34). The magnetic field generator installation space is a closed space enclosed by the front cover plate (33), the rear cover plate (34), the inner cylinder (31) and the outer cylinder (32).

3. A multi-mode electromagnetic stirring device according to claim 1, wherein The number of electrical connection boxes (35) is one or more, and the coolant connection pipe (36) includes a coolant inlet pipe and a coolant outlet pipe, which are located at the front and rear ends of the housing assembly (3), respectively.

4. A multi-mode electromagnetic stirring device according to claim 1, wherein The electrical connection box (35) is used to connect to an external power source, and the coolant connection pipe (36) is connected to an external coolant circulation unit.

5. A multi-mode electromagnetic stirring device according to claim 1, wherein The end faces of the inner cylinder (31) and the outer cylinder (32) are circular, polygonal, or irregular.

6. A multi-mode electromagnetic stirring device according to claim 1, wherein The traveling wave core (111) is a strip structure. The traveling wave core (111) includes several core laminations A (111-1) stacked together. Each side of the core lamination A (111-1) is provided with a core pressure plate A (111-2). The bolt assembly A passes through the core pressure plate A (111-2) to lock the core lamination A (111-1). The traveling wave coil (112) is wound on the traveling wave core (111). The number of traveling wave coils (112) on each traveling wave magnetic field generator (11) is a multiple of 2 or 3.

7. A multi-mode electromagnetic stirring device according to claim 1, wherein The rotating iron core (21) has a ring structure. The rotating iron core (21) includes several iron core laminations B (21-1) stacked together. Each side of the iron core laminations B (21-1) is provided with an iron core pressure plate B (22-2). The bolt assembly B passes through the iron core pressure plate B (22-2) to lock the iron core laminations B (21-1). The number of rotating coils (22) is a multiple of 2 or 3.

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