Electromagnetic stirring device for hollow circular tube blank continuous casting crystallizer
By installing a built-in electromagnetic stirring device inside the inner water jacket of the hollow circular tube blank continuous casting crystallizer, the problems of poor metallurgy and large power consumption of existing external devices are solved, and more efficient metallurgy effects and lower power consumption are achieved, while significantly reducing the device size.
Patent Information
- Application Number
- CN202421565972.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The existing external electromagnetic stirring device used for hollow circular tube blank continuous casting crystallizers has poor metallurgy effect, large power consumption, and the device size is much larger than the outer diameter of the tube blank, resulting in serious magnetic field attenuation.
A built-in electromagnetic stirring device is designed, installed inside the inner water jacket of the hollow circular tube blank continuous casting crystallizer, including the built-in stirrer coil, magnetic teeth and yoke. The magnetic teeth protrude toward the outer circle of the yoke, and the magnetic field passes through the inner water jacket and copper tube to reduce attenuation.
The metallurgical effect has been improved, the power consumption has been reduced by more than 40%, the device size has been reduced by more than 50%, and the product quality of continuous casting billets has been improved.
Smart Images
Figure CN222944466U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of hollow round tube billet continuous casting, in particular to an electromagnetic stirring device used for a hollow round tube billet continuous casting crystallizer. Background Art
[0002] The direct rolling of seamless steel pipes from hollow round tube billets produced by continuous casting can save the pipe threading process and greatly reduce the production cost of seamless steel pipes. It is the development direction of seamless steel pipe production technology. The best production process for continuous casting of hollow round tube billets is to use crystallizer electromagnetic stirring technology to improve the quality of tube billets. Electromagnetic stirring technology uses the electromagnetic force generated by the electromagnetic stirrer to stir the solidifying molten steel during the continuous casting process, improve the equiaxed crystal rate of the continuous casting billet, refine the solidification structure, promote the floating of inclusions, and uniform the composition, thereby greatly improving the quality of the continuous casting billet. According to the different stirring positions, continuous casting electromagnetic stirring can be divided into three types: crystallizer electromagnetic stirring, secondary cooling zone electromagnetic stirring, and solidification end electromagnetic stirring. The structure and action mechanism of these three types of electromagnetic stirrers are basically the same. Among them, crystallizer electromagnetic stirring has the best metallurgical effect, so it is also the most widely used. It is a necessary equipment for high-quality steel continuous casting to improve the quality of continuous casting billets.
[0003] In the prior art, the electromagnetic stirring device used in the hollow round tube continuous casting crystallizer is usually an external type, see Figure 1 , electromagnetic stirring of the hollow tube billet continuous casting crystallizer, the electromagnetic stirrer is installed on the outside of the tube billet, the magnetic field generated by the electromagnetic stirrer starts from the end face of the magnetic tooth, penetrates the outer water jacket 1, the outer copper tube 2, and penetrates from the outermost layer of the molten steel 3 to the center, the electromagnetic stirrer must surround the outer diameter of the entire tube billet, and the overall size of the stirrer must be much larger than the outer diameter of the tube billet, which also causes the stirrer to have a poor metallurgical effect and high power consumption. The external stirrer magnetic teeth 13 placed between the external stirrer inner shell 15 and the external stirrer outer shell 17 protrude toward the inner circle of the external stirrer yoke 14. The molten steel 3 is inside the entire stirrer, and the magnetic field needs to pass through the outer water jacket 1 and the thicker outer copper tube 2, and the attenuation is large. Summary of the invention
[0004] The utility model aims to provide a crystallizer electromagnetic stirring device of a novel structure, which is installed inside the inner water jacket of a hollow tube billet continuous casting crystallizer and has the characteristics of good metallurgical effect and low power consumption.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] An electromagnetic stirring device for a hollow round tube continuous casting crystallizer, the device is installed inside the inner water jacket 5 of the hollow round tube continuous casting crystallizer assembly and is coaxially arranged with the continuous casting crystallizer. The device includes a built-in agitator inner shell 16, a built-in agitator yoke 8 and a built-in agitator outer shell 9 which are coaxially arranged in sequence from the axis outward. The outer circumference of the built-in agitator yoke 8 is provided with a plurality of built-in agitator magnetic teeth 7 in a circumferentially uniform manner, and a built-in agitator coil 6 is wound around the outer side of each built-in agitator magnetic tooth 7; cooling water is passed between the built-in agitator outer shell 9 and the built-in agitator inner shell 16.
[0007] The built-in stirrer magnetic teeth 7 protrude outwardly relative to the circumference of the built-in stirrer yoke 8 , and the built-in stirrer coil 6 is wound around both sides of the built-in stirrer magnetic teeth 7 .
[0008] The built-in agitator inner housing 16 , the built-in agitator yoke 8 and the built-in agitator outer housing 9 have coaxial circular cross sections.
[0009] The height of the built-in stirrer magnetic teeth 7 protruding relative to the outer circumferential surface of the built-in stirrer yoke 8 is 20 to 300 mm.
[0010] The width of the magnetic teeth 7 of the built-in stirrer is 20 to 400 mm.
[0011] The number of turns of the built-in stirrer coil 6 is 10 to 500 turns.
[0012] The built-in stirrer magnetic teeth 7 and the built-in stirrer yoke 8 constitute an iron core, and the total height of the iron core is 50 to 700 mm.
[0013] The beneficial technical effects of the utility model are:
[0014] The utility model discloses an electromagnetic stirring device, in which the magnetic teeth 7 of the built-in stirrer protrude toward the outer circle of the built-in stirrer yoke 8, and the molten steel 3 is outside the entire stirrer. The magnetic field only needs to pass through the inner water jacket 5 and the inner copper tube 4 with a smaller thickness, and the attenuation is relatively small.
[0015] The utility model hollow tube billet crystallizer electromagnetic stirring device reduces the size by more than 50% compared with the external electromagnetic stirring device in the prior art, can reduce the power consumption by more than 40%, and the product quality of the continuous casting billet is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of an external electromagnetic stirrer used in a hollow round tube continuous casting crystallizer in the prior art;
[0017] Figure 2 The utility model is a schematic structural diagram of an electromagnetic stirring device for a hollow round tube billet continuous casting crystallizer.
[0018] Reference numerals:
[0019] 1 Outer water jacket 2 Outer copper tube
[0020] 3Steel liquid 4Inner copper tube
[0021] 5Inner water jacket 6Built-in stirrer coil
[0022] 7 built-in agitator magnetic gear 8 built-in agitator yoke
[0023] 9 built-in agitator outer shell 10 inner cooling water
[0024] 11 External cooling water 12 External agitator coil
[0025] 13 External stirrer magnetic gear 14 External stirrer yoke
[0026] 15 External agitator inner shell 16 Internal agitator inner shell
[0027] 17 External agitator housing DETAILED DESCRIPTION
[0028] like Figure 2 As shown, an electromagnetic stirring device for a hollow round tube continuous casting crystallizer is installed inside the inner water jacket 5 of the hollow round tube continuous casting crystallizer assembly, and includes a built-in agitator coil 6, a built-in agitator magnetic gear 7, a built-in agitator yoke 8, and a built-in agitator outer shell 9; the built-in agitator outer shell 9 is arranged outside the circumference of the built-in agitator yoke 8, and the built-in agitator inner shell 16 is arranged inside the circumference of the built-in agitator yoke 8.
[0029] The outer ring of the built-in agitator yoke 8 is covered with a protective built-in agitator outer shell 9, and the inner ring of the built-in agitator yoke 8 is covered with a built-in agitator inner shell 16. Cooling water is passed between the built-in agitator outer shell 9 and the built-in agitator inner shell 16 to cool the Joule heat generated after the coil is energized. Located between the built-in agitator outer shell 9 and the built-in agitator inner shell 16 is an iron core composed of the built-in agitator magnetic teeth 7 and the built-in agitator yoke 8. The built-in agitator coil 6 is wound on both sides of the built-in agitator magnetic teeth 7 to guide the magnetic field generated by the built-in agitator coil 6 to the outside. The built-in agitator yoke 8 forms a closed loop with the magnetic field generated by the built-in agitator coil 6.
[0030] The built-in stirrer magnetic teeth 7 protrude toward the outer circle relative to the periphery of the built-in stirrer yoke 8 , and the protruding portion is 20 to 300 mm higher than the outer circle of the built-in stirrer yoke 8 .
[0031] The width of the magnetic teeth 7 of the built-in stirrer is 20 to 400 mm.
[0032] The number of turns of the built-in stirrer coil 6 is 10 to 500 turns.
[0033] The total height of the core with built-in stirrer is 50 to 700 mm.
[0034] According to the above content, the electromagnetic stirring device of the hollow circular tube continuous casting crystallizer of the utility model is installed in the space of the inner water jacket of the continuous casting crystallizer. The magnetic field generated by the built-in stirrer starts from the end face of the magnetic teeth 7 of the built-in stirrer, penetrates the inner water jacket 5 and the inner copper tube 4, and penetrates from the innermost layer of the molten steel to the outside, thereby stirring the annular molten steel in the entire crystallizer.
Claims
1. An electromagnetic stirring device for a hollow round tube continuous casting crystallizer, characterized in that: The device is installed inside the inner water jacket (5) of the hollow round tube continuous casting crystallizer assembly and is coaxially arranged with the continuous casting crystallizer. The device comprises a built-in agitator inner shell (16), a built-in agitator yoke (8) and a built-in agitator outer shell (9) which are coaxially arranged in sequence from the axis outward. The outer circumference of the built-in agitator yoke (8) is provided with a plurality of built-in agitator magnetic teeth (7) in a circumferentially uniform manner. The outer side of each built-in agitator magnetic tooth (7) is wound with a built-in agitator coil (6); and cooling water is passed between the built-in agitator outer shell (9) and the built-in agitator inner shell (16).
2. The electromagnetic stirring device for a hollow round tube continuous casting crystallizer according to claim 1, characterized in that: The built-in stirrer magnetic teeth (7) protrude outward relative to the circumference of the built-in stirrer yoke (8), and the built-in stirrer coil (6) is wound around both sides of the built-in stirrer magnetic teeth (7).
3. The electromagnetic stirring device for the hollow round tube continuous casting crystallizer according to claim 1, characterized in that: The built-in agitator inner shell (16), the built-in agitator yoke (8) and the built-in agitator outer shell (9) have coaxial annular cross sections.
4. The electromagnetic stirring device for a hollow round tube continuous casting crystallizer according to claim 1, characterized in that: The height of the built-in stirrer magnetic teeth (7) protruding relative to the circumferential outer side of the built-in stirrer yoke (8) is 20 to 300 mm.
5. The electromagnetic stirring device for a hollow round tube continuous casting crystallizer according to claim 1, characterized in that: The width of the magnetic teeth (7) of the built-in stirrer is 20 to 400 mm.
6. The electromagnetic stirring device for a hollow round tube continuous casting crystallizer according to claim 1, characterized in that: The number of turns of the built-in stirrer coil (6) is 10 to 500 turns.
7. The electromagnetic stirring device for a hollow round tube continuous casting crystallizer according to claim 1, characterized in that: The built-in stirrer magnetic teeth (7) and the built-in stirrer yoke iron (8) form an iron core, and the total height of the iron core is 50 to 700 mm.