Magnetic gathering roller type magnetic stirrer for slab continuous casting machine

Abstract

The utility model provides a magnetism gathering roller type magnetic stirrer for a slab continuous casting machine, which relates to the technical field of electromagnetic metallurgy process in steel industry, and comprises a stirrer body, the stirrer body consists of a roller sleeve, an inductor, an outer shielding ring group and a bearing seat, the inductor is inserted in the roller sleeve, the outer shielding ring group is arranged below the roller sleeve, and the bearing seat is arranged below the roller sleeve. According to the magnetism gathering type stirrer, the overall design is novel, the structure is simple, the angle A of the appearance shielding ring is adjusted through the kidney-shaped hole, and when a pair of magnetism gathering roller type magnetic stirrers is installed in a mirror image mode, the outer shielding ring is aligned. The roller type electromagnetic stirrer has multiple magnetism gathering effects of the inner shielding ring, the magnetic poles and the outer shielding ring, and is high in intermediate magnetic induction intensity and thrust and good in metallurgical effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic metallurgical process in the steel industry, and more specifically relates to a magnetic roller-type magnetic stirrer for a slab continuous casting machine. Background Art

[0002] The operating principle of a roller electromagnetic stirrer is that an electromagnetic coil wound around an iron core generates a traveling wave magnetic field under the influence of an external variable frequency power supply. The force applied to the molten steel within the ingot is studied. Because the molten steel, acting as a conductor, cuts the magnetic flux lines of the traveling wave magnetic field, becoming a current-carrying conductor, the moving traveling wave magnetic field generates eddy currents within the ingot's molten steel volume element. The magnetic field exerts a Lorentz force, or electromagnetic force, on the eddy currents. This electromagnetic force acts on the molten steel volume element, driving the flow of the molten steel and thereby stirring the molten steel in the ingot's core. This, in turn, controls the ingot's grain size during solidification, increasing the equiaxed grain ratio, and improving metallurgical defects such as center segregation and center porosity, ultimately improving ingot quality.

[0003] Based on the above, the following issues were identified: Currently, paired roller electromagnetic stirrers installed on slab continuous casting machines provide a strong magnetic field effect, increasing the equiaxed grain ratio of the slab and reducing center porosity and segregation. The magnetic induction intensity between the paired roller electromagnetic stirrers is a key indicator of their performance.

[0004] CN100450668C: High Magnetic Field Slab Secondary Cooling Zone Electromagnetic Stirring Roller, discloses an electromagnetic stirring roller with a high magnetic field shielding ring, which increases the magnetic induction intensity of the working surface. It explicitly does not have magnetic poles, but simulation and practical experience have shown that the use of magnetic poles can have a magnetic field gathering and attracting effect.

[0005] CN118253727 A: A roller-type electromagnetic stirrer and continuous casting machine. Disclosed is a roller-type electromagnetic stirrer mounted on a sector. The roller-type electromagnetic stirrer lacks a magnetic shielding ring, which is instead mounted on the sector of the continuous casting machine. This structure lacks magnetic shielding and concentration within the roller-type electromagnetic stirrer. The magnetic shielding ring is mounted on the sector, requiring modification with the consent of the sector user. This leads to long modification cycles and high costs. Replacement and maintenance are difficult, and the magnetic shielding ring cannot be adjusted in angle or aligned to concentrate magnetic flux.

[0006] Therefore, in view of this, the existing structure and defects are studied and improved, and a magnetic roller agitator for a slab continuous casting machine is provided, in order to achieve a purpose with greater practical value. Utility Model Content

[0007] The purpose and effect of the magnetic agitator with a concentrated roller for a slab continuous casting machine are achieved by the following specific technical means:

[0008] A magnetic roller agitator for a slab continuous casting machine comprises an agitator body, the agitator body consisting of a roller sleeve, an inductor, an outer shielding ring group and a bearing seat, the inductor is inserted and installed in the roller sleeve, the outer shielding ring group is arranged below the roller sleeve, and the two ends of the roller sleeve are respectively mounted on the bearing seat, the inductor consists of a shaft head, an iron core connecting block, an inner shielding ring, an inner shielding ring seat, an iron core group and a coil, the outer shielding ring group consists of an outer shielding ring, a bolt and an outer shielding ring seat, the two ends of the iron core group are assembled and installed with the shaft head through the iron core connecting block, and the coils are equidistantly mounted on the iron core group, the lower outer wall of the iron core group is provided with an inner shielding ring seat, and is assembled and installed with the inner shielding ring through bolts, the outer shielding ring group is located outside the roller sleeve, and is fixed between the bearing seats through the outer shielding ring seat and bolts.

[0009] Furthermore, the core group includes magnetic poles, core blocks, silicon steel sheet groups, and electrical pure iron. The core group clamps the silicon steel sheet groups through the core blocks and the electrical pure iron.

[0010] Furthermore, the magnetic poles are arranged between the coils and on the opposite side of the inner shielding ring, and the inner shielding ring is interposed between the core group and the roller sleeve.

[0011] Furthermore, waist-shaped holes are provided on the contact surfaces between the outer shielding ring seat and the outer shielding ring of the outer shielding ring assembly.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The slab continuous casting machine in the present application uses a magnetic roller-type magnetic agitator, and the inductor core group is provided with a magnetic pole, an inner shielding ring is provided between the roller sleeve and the inductor, and an outer shielding ring is provided outside the roller sleeve, which has multiple magnetic focusing effects, so that the magnetic induction intensity in the middle of the roller-type electromagnetic agitator installed on the roller is large. The outer shielding ring of the present application is installed between the two bearing seats through the outer shielding ring seat. It is only necessary to add corresponding mounting holes on the bearing seats, and a waist-shaped hole is opened on the outer shielding ring seat to adjust the angle A of the outer shielding ring. The slab continuous casting machine is generally an arc-shaped continuous casting machine, and the installation of the inner arc roller generally has an angle B. Then, by adjusting the angle A of the outer shielding ring group, the outer shielding rings of the inner arc roller and the outer arc roller are aligned; the outer shielding ring group angle of the outer arc roller is B1, and the outer shielding ring group angle of the inner arc roller is B2. Then, when B1+B2=B, the outer shielding ring groups of a pair of rollers are aligned, and the shielding effect is best. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the internal structure of a magnetic roller-type magnetic stirrer for a slab continuous casting machine according to an embodiment of the present utility model;

[0015] Figure 2This is an AA cross-sectional view of a magnetic agitator with a concentrated roller for a slab continuous casting machine according to an embodiment of the present utility model;

[0016] Figure 3 This is a BB cross-sectional view of a magnetic agitator with a concentrated roller for a slab continuous casting machine according to an embodiment of the present utility model;

[0017] Figure 4 This is an exploded view of the structure of a magnetic roller type magnetic stirrer for a slab continuous casting machine according to an embodiment of the utility model;

[0018] Figure 5 This is an exploded view of the structure of a magnetic agitator inductor for a slab continuous casting machine according to an embodiment of the present utility model;

[0019] Figure 6 This is a schematic diagram of a pair of magnetic agitators of a magnetic roller type for a slab continuous casting machine according to an embodiment of the present utility model;

[0020] Figure 7 This is a schematic diagram of a pair of magnetic roller-type magnetic stirrers for a slab continuous casting machine installed in a fan-shaped segment according to an embodiment of the utility model.

[0021] In the figure, the corresponding relationship between component names and drawing numbers is as follows:

[0022] 1. Roller sleeve; 2. Inductor; 3. Outer shielding ring assembly; 31. Outer shielding ring; 32. Bolt; 33. Outer shielding ring seat; 331. Waist-shaped hole; 4. Bearing seat; 21. Shaft head; 22. Core connecting block; 23. Inner shielding ring; 24. Inner shielding ring seat; 25. Core assembly; 251. Magnetic pole; 252. Core pressing block; 253. Silicon steel sheet assembly; 254. Electrical pure iron; 26. Coil. DETAILED DESCRIPTION

[0023] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances. Example

[0026] As attached Figure 1 To the attached Figure 7 As shown:

[0027] The utility model provides a magnetic roller stirrer for a slab continuous casting machine, comprising a stirrer body, the stirrer body consisting of a roller sleeve 1, an inductor 2, an outer shielding ring group 3 and a bearing seat 4, the inductor 2 being inserted and installed in the roller sleeve 1, the outer shielding ring group 3 being arranged below the roller sleeve 1, and the two ends of the roller sleeve 1 being respectively mounted on the bearing seat 4, the inductor 2 consisting of a shaft head 21, an iron core connecting block 22, an inner shielding ring 23, an inner shielding ring seat 24, an iron core group 25 and a coil 26, The outer shielding ring group 3 consists of an outer shielding ring 31, a bolt 32 and an outer shielding ring seat 33. The two ends of the core group 25 are assembled and installed with the shaft head 21 through the core connecting block 22, and the coil 26 is equidistantly set on the core group 25. The lower outer wall of the core group 25 is provided with an inner shielding ring seat 24, which is assembled and installed with the inner shielding ring 23 through bolts 32. The outer shielding ring group 3 is located outside the roller sleeve 1 and is fixed between the bearing seat 4 through the outer shielding ring seat 33 and the bolts 32.

[0028] The core group 25 includes a magnetic pole 251 , a core pressing block 252 , a silicon steel sheet group 253 , and electrical pure iron 254 . The core group 25 clamps the silicon steel sheet group 253 through the core pressing block 252 and the electrical pure iron 254 .

[0029] The magnetic poles 251 are arranged between the coils 26 and on the opposite side of the inner shielding ring 23 , and the inner shielding ring 23 is interposed between the core assembly 25 and the roller sleeve 1 .

[0030] The outer shielding ring seat 33 of the outer shielding ring assembly 3 contacts the outer shielding ring 31 with a waist-shaped hole 331. By adjusting the mounting position of the bolt 32, the waist-shaped hole 331 can adjust the angle A of the outer shielding ring assembly 3 between 0 and 20 degrees. The inner arc roller angle of the sector is B. Adjusting the angle A of the outer shielding ring assembly 3 aligns the outer shielding rings 31 of the inner and outer arc rollers. The angles B1 and B2 of the outer shielding ring assembly 3 of the outer arc roller are B1 and B2, respectively, where B1 + B2 = B. Adjusting the angle A of the outer shielding ring 31 through the waist-shaped hole 331 ensures alignment of the outer shielding rings 31 when a pair of magnetic roller stirrers are mirror-imaged. The presence of magnetic poles, inner shielding rings, and outer shielding rings ensures high magnetic induction intensity in the center of the paired roller electromagnetic stirrers.

[0031] The specific usage and function of this embodiment are as follows:

[0032] Before using this type of magnetic roller stirrer, first inspect the stirrer's overall integrity. Then, install the stirrer on the corresponding slab continuous casting machine. During actual adjustments, adjustments must be made based on production needs. When adjusting the roller spacing, the outer arc roller is fixed to the caster's base, while the inner arc roller is typically adjusted using a hydraulic cylinder. The outer roller position of the manufactured inner arc sector, at angle B, is fixed. When adjusting the inner and outer arc shielding plates of the roller stirrer, the outer shielding plate is vertical, perpendicular to the bearing seat. First, mark two vertical points a and b on the roller stirrer, and point c on the outer shielding plate. Draw a line between points b and c. Then, use an arc alignment plate to align the arcs to obtain point d. Rotate the roller stirrer so that points a and d coincide. Finally, adjust the outer shielding plate to align points c and b. The outer shielding plate adjustment angle is now B1. Similarly, adjust the outer shielding plate of the outer and inner arc roller stirrer to angle B2, where B2 + B1 = B. By adjusting the outer shielding plates of the outer arc roller electromagnetic stirrer and the inner arc roller electromagnetic stirrer, the two outer shielding plates are aligned, and the magnetic field is concentrated in the middle of the ingot, so that the magnetic induction intensity at the ingot is large, and ultimately the electromagnetic thrust is large.

[0033] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A magnetic agitator with a concentrated roller for a slab continuous casting machine, comprising an agitator body, characterized in that: The stirrer body is composed of a roller sleeve (1), an inductor (2), an outer shielding ring group (3) and a bearing seat (4); the inductor (2) is inserted and installed in the roller sleeve (1); the outer shielding ring group (3) is arranged below the roller sleeve (1), and the two ends of the roller sleeve (1) are respectively mounted on the bearing seat (4); the inductor (2) is composed of a shaft head (21), an iron core connecting block (22), an inner shielding ring (23), an inner shielding ring seat (24), an iron core group (25) and a coil (26); the outer shielding ring group (3) is composed of an outer shielding ring (3 1), bolts (32) and an outer shielding ring seat (33), the two ends of the core group (25) are assembled and installed with the shaft head (21) through the core connecting block (22), and the coil (26) is equidistantly sleeved on the core group (25), the lower outer wall of the core group (25) is provided with an inner shielding ring seat (24), and is assembled and installed with the inner shielding ring (23) through bolts (32), the outer shielding ring group (3) is located outside the roller sleeve (1), and is fixed between the bearing seat (4) through the outer shielding ring seat (33) and the bolts (32).

2. The magnetic agitator for a slab continuous casting machine according to claim 1, wherein: The iron core group (25) comprises a magnetic pole (251), an iron core pressing block (252), a silicon steel sheet group (253), and electrical pure iron (254); the iron core group (25) clamps the silicon steel sheet group (253) through the iron core pressing block (252) and the electrical pure iron (254).

3. The magnetic agitator of a magnetic roller type for a slab continuous casting machine according to claim 2, characterized in that: The magnetic poles (251) are arranged between the coils (26) and are located on the opposite side of the inner shielding ring (23), and the inner shielding ring (23) is interposed between the iron core group (25) and the roller sleeve (1).

4. The magnetic agitator for a slab continuous casting machine according to claim 1, wherein: A waist-shaped hole (331) is provided on the contact surface between the outer shielding ring seat (33) of the outer shielding ring assembly (3) and the outer shielding ring (31).

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