Combined multi-section tail end electromagnetic stirrer

Abstract

The utility model relates to a combined type multi-section tail end electromagnetic stirrer which comprises a sealing cavity, a shielding assembly and an iron core assembly which correspond to each other are arranged in the sealing cavity, and the shielding assembly surrounds the non-working face of the iron core assembly so as to achieve magnetic field shielding on the non-working face of the iron core assembly. The top of the sealing cavity is provided with a water distribution assembly which reasonably distributes cooling water to the iron core assembly. A cylindrical cooling water chamber assembly is arranged in the middle of the top of the sealing cavity, and the top of the cooling water chamber assembly is detachably connected with a terminal plate assembly. A cavity opening is formed in the top of the close seam cavity, an internal cable is led out of the iron core assembly, the internal cable upwards penetrates through the cavity opening and the cooling water chamber assembly and then is electrically connected with the terminal board assembly, and the terminal board assembly is further electrically connected with an external variable-frequency power source.

Description

Technical Field

[0001] This utility model relates to the technical field of continuous casting in metal smelting, specifically to a combined multi-section end electromagnetic stirrer. Background Technology

[0002] The working principle of an electromagnetic stirrer is as follows: under the action of an external frequency converter, an electromagnetic coil wound on an iron core assembly generates a traveling wave magnetic field (Ampere's law, magnetism arises from electricity). Taking the molten steel inside the billet as the object of study, since the molten steel, as a conductor, cuts the magnetic field lines of the traveling wave magnetic field and thus becomes a current-carrying conductor, the moving traveling wave magnetic field generates eddy currents in the volume element of the molten steel in the billet (right-hand rule, electricity arises from motion). The magnetic field generates a Lorentz force on the eddy currents (left-hand rule, force arises from electricity), which is an electromagnetic force. The electromagnetic force acts on the volume element of the molten steel, promoting the flow of the molten steel, thereby agitating the molten steel in the core of the billet. This, in turn, controls the refinement of the billet grains, increases the equiaxed grain ratio, improves central segregation, and reduces central porosity and other metallurgical defects during the solidification process, ultimately achieving the goal of improving the quality of the billet.

[0003] Because traditional continuous casting machines did not consider the installation requirements of conventional electromagnetic stirrers, installing them later is extremely troublesome. It generally requires significant modifications to the sector section. Some continuous casting machines have sector sections that are not worth reusing, and sometimes even require redesigning and manufacturing entirely new sector sections, which undoubtedly places a huge financial burden on the owner.

[0004] Traditional end-effector electromagnetic stirrers are relatively difficult to install and are integral units. Once the shape and structure are determined, they cannot be adjusted. Therefore, the corresponding billet cross-sections of traditional end-effector electromagnetic stirrers are limited. In order to meet the metallurgical process requirements of billet with different cross-sections, owners often need to configure multiple end-effector electromagnetic stirrers with different cross-sections, which undoubtedly brings a huge economic burden to the owners.

[0005] Traditional end-effector electromagnetic stirrers lack internal shielding components, resulting in significant magnetic leakage at non-working surfaces. Consequently, electromagnetic stirrers require high operating electrical control parameters to meet normal metallurgical process requirements, leading to high power consumption per ton of steel. This is not energy-efficient or environmentally friendly, undoubtedly placing a significant economic burden on the owner. Utility Model Content

[0006] In view of the above-mentioned technical problems in related technologies, this utility model proposes a combined multi-section end electromagnetic stirrer, which can overcome the above-mentioned shortcomings of the prior art.

[0007] To achieve the above-mentioned technical objectives, the technical solution of this utility model is as follows:

[0008] A combined multi-section end electromagnetic stirrer includes a sealed cavity, inside which are provided corresponding shielding components and iron core components, the shielding components surrounding the non-working surface of the iron core components;

[0009] The top of the sealed cavity is provided with a water distribution component that rationally distributes cooling water to the iron core assembly;

[0010] A cylindrical cooling water chamber assembly is also provided at the middle position of the top of the sealed cavity, and a terminal plate assembly is detachably connected to the top of the cooling water chamber assembly.

[0011] The sealed cavity has an opening at its top. An internal cable extends from the core assembly, passes upward through the cavity opening and the cooling water chamber assembly, and is electrically connected to the terminal block assembly. The terminal block assembly is also electrically connected to an external frequency converter power supply. In implementation, the core assembly receives power from the frequency converter power supply via the internal cable and terminal block assembly, thereby generating a traveling wave magnetic field in the molten steel billet to be stirred. The molten steel billet generates eddy currents under the influence of the magnetic field, and the magnetic field exerts a Lorentz force—i.e., electromagnetic thrust—on the eddy currents. This electromagnetic thrust stirs the molten steel billet, thereby improving the billet quality. The shielding assembly surrounds the non-working surface of the core assembly to provide magnetic field shielding. The cavity opening is preferably located in the middle of the top of the sealed cavity.

[0012] Preferably, the sealed cavity is formed by an outer shell assembly and a top plate assembly, wherein the top of the outer shell assembly is detachably connected to the bottom of the top plate assembly.

[0013] Preferably, the outer casing assembly includes an outer casing base plate, an enclosing outer casing side plate on the top of the outer casing base plate, a core mounting seat corresponding to the core assembly on the inner side wall of the outer casing side plate, and an outer casing flange on the top of the outer casing side plate. The outer casing flange and the top plate assembly are detachably connected by threaded holes and bolts. The core assembly is mounted on the core mounting seat.

[0014] Preferably, the shielding assembly includes a shielding side plate and a shielding top plate. The shielding side plate is installed on the inner side wall of the bottom plate of the outer shell, and the shielding top plate is installed at the bottom of the top plate assembly. The shielding assembly thereby surrounds the top and side surfaces of the core assembly—that is, the non-working surfaces of the core assembly—while the bottom surface of the core assembly serves as the working surface.

[0015] Preferably, the core assembly includes a plurality of stacked core laminations, the core laminations being wrapped and fixed by core clamps and core end faces, the core clamps being in close contact with the front and rear sides of the core laminations, and the core end faces being in close contact with the left and right sides of the core laminations.

[0016] The outer side of the core lamination is provided with a core mounting block corresponding to the core mounting seat, and the core mounting seat and the core mounting block are detachably connected.

[0017] An electromagnetic coil is wound around the core laminations and core clamps, and the electromagnetic coil leads out from the internal cable. The electromagnetic coil can undergo multiple vacuum impregnation and baking processes to ensure long-term stable operation and maintain good insulation.

[0018] Preferably, the core mounting block and the core mounting base can be detachably connected by threaded holes, bolts or screws, or by snap-fit ​​connection or other means.

[0019] Preferably, the top plate assembly includes an outer shell top plate, the bottom of which is detachably connected to an outer shell flange, and mounting plates are fixedly connected to the left and right ends of the top of the outer shell top plate. A reinforcing plate is provided between the mounting plate and the outer shell top plate, and the reinforcing plate is fixedly connected to the mounting plate and the outer shell top plate respectively.

[0020] The mounting plate is provided with mounting holes for connecting and fixing to the sector section of the continuous casting machine. In implementation, the mounting plate is connected to the sector section of the continuous casting machine via the mounting holes, bolts, etc., thereby installing and fixing the multi-section end electromagnetic stirrer onto the sector section of the continuous casting machine. It can be further reinforced with welding stiffening plates to the top plate of the outer shell. The cavity opening can be formed on the top plate of the outer shell.

[0021] Preferably, the mounting hole can be a slotted hole, a threaded hole, or a long sliding hole, with a slotted hole or a long sliding hole being more preferred. This is because the relative position of the bolt and the slotted hole can be adjusted to change the distance between the two opposing multi-section end electromagnetic stirrers, thereby adapting to the metallurgical process requirements of castings of different thicknesses.

[0022] Preferably, the reinforcing plate is provided with lifting holes to assist in hoisting. The lifting holes can be used to hoist the multi-section end electromagnetic stirrer.

[0023] Preferably, the water distribution assembly includes a water distribution box, which is installed on the top of the sealed cavity. The water distribution box is connected upward to a quick-connect water pipe and downward to a water distribution pipe, which extends downward into the interior of the sealed cavity. The top of the sealed cavity has a through-hole corresponding to the water distribution pipe. In implementation, the water distribution box can be installed on the top plate of the outer shell of the top plate assembly, and the through-hole can be opened on the top plate of the outer shell. The water distribution box receives cooling water from the outside through the quick-connect water pipe and distributes the cooling water reasonably to the internal iron core assembly through the water distribution pipe to avoid the formation of air bubbles or waterless spaces or stagnant corners inside the sealed cavity. If the above-mentioned drawbacks exist, it will lead to insufficient cooling of the electromagnetic coil, and in severe cases, it will cause the electromagnetic coil to burn out due to insufficient cooling.

[0024] Preferably, the cooling water chamber assembly includes an enclosing cooling water chamber side plate, with a lower cooling water chamber flange connected to the bottom and an upper cooling water chamber flange connected to the top of the side plate. In practice, the cooling water chamber assembly can serve as a transition zone between the cooling area (inside the sealed cavity) and the drying area (outside the sealed cavity), and can also provide an installation platform for the terminal block assembly.

[0025] Preferably, the lower flange of the cooling water chamber is detachably connected to the top of the sealing cavity, and the lower flange of the cooling water chamber surrounds the outer edge of the cavity opening.

[0026] Preferably, the terminal block assembly is disposed on the upper flange of the cooling water chamber.

[0027] Preferably, the terminal block assembly includes a terminal block disposed on top of the cooling water chamber assembly.

[0028] Preferably, the terminal block is penetrated by a plurality of wiring screws, the terminal block has terminal block through holes corresponding to the wiring screws, and the bottom of the wiring screws is electrically connected to the internal cable.

[0029] Preferably, the top of the terminal block is provided with a waterproof plug to seal the gap between the wiring screw and the through hole of the terminal block.

[0030] Preferably, the wiring screw is connected to a bolt fastener and a wiring lug;

[0031] Preferably, the wiring screw is electrically connected to an external frequency converter power supply via the wiring lug. In implementation, the terminal block assembly can serve as the interface between the cooling zone (inside the sealed cavity) and the drying zone (outside the sealed cavity), providing an installation platform for the wiring screw and junction box assembly.

[0032] Preferably, the terminal block can be detachably connected to the upper flange of the cooling water chamber.

[0033] Preferably, the terminal block assembly is detachably covered by a junction box assembly.

[0034] Preferably, the junction box assembly includes a junction box flange, a junction box side plate enclosing the top of the junction box flange, a junction box side cover plate on the outer side of the junction box side plate, and a junction box top cover plate on the top of the junction box side plate; the junction box top cover plate is provided with a blower connector and a high-temperature cable waterproof plug corresponding to the wiring lug. In implementation, the wiring lug and the external frequency converter power supply can be electrically connected through an external high-temperature cable. The external high-temperature cable passes through the high-temperature cable waterproof plug and enters the junction box assembly, then connects to the corresponding wiring lug, thereby realizing the electrical connection between the core assembly and the external frequency converter power supply through the internal cable, wiring screw, wiring lug, and external high-temperature cable.

[0035] The junction box assembly provides a dry environment for the connection between the external high-temperature cable and the multi-section end electromagnetic stirrer. The high-temperature cable waterproof plug can be used to seal the gap between the corresponding external high-temperature cable and the connector lug. The pneumatic nozzle connector serves as an interface for introducing external dry gas into the sealed cavity. The pneumatic nozzle connector can introduce dry compressed air or nitrogen into the sealed cavity, creating positive pressure inside the junction box. Because the multi-section end electromagnetic stirrer operates in a harsh environment of high temperature and high humidity, the entry of external moisture will affect the insulation value of the electromagnetic stirrer; therefore, the junction box assembly is needed as a platform to provide a dry and sealed environment.

[0036] Preferably, the junction box flange and the terminal block are detachably connected.

[0037] Preferably, the top of the junction box side plate is higher than the height of the wiring lug, and there is preferably a gap between the two. The external high-temperature cable passes through the high-temperature cable waterproof plug into the inside of the junction box assembly and then connects to the wiring lug.

[0038] The beneficial effects of this design are as follows: By making the electromagnetic stirrer into a split structure, the compact design avoids significant modifications to the sector section; installation is convenient and flexible adjustments are possible; easy adjustment adapts to the metallurgical needs of various cross-section cast billets; and the shielding function effectively reduces magnetic leakage, making it more energy-efficient and environmentally friendly. This product involves pairing and installing the modified multi-section end electromagnetic stirrer to the predetermined position on the sector section, connecting the cooling water, electrical, and drying gas interfaces, and then powering it on for operation. Attached Figure Description

[0039] The present invention will now be described in further detail with reference to the accompanying drawings.

[0040] Figure 1 : Front view of the multi-section end electromagnetic stirrer of this utility model.

[0041] Figure 2 : A perspective view of the multi-section end electromagnetic stirrer described in this utility model.

[0042] Figure 3 : A cross-sectional view of the multi-section end electromagnetic stirrer described in this utility model.

[0043] Figure 4 : Exploded view of the multi-section end electromagnetic stirrer of this utility model.

[0044] Figure 5 : A cross-sectional view of the outer shell assembly of the multi-section end electromagnetic stirrer described in this utility model.

[0045] Figure 6 : A cross-sectional view of the core assembly of the multi-section end electromagnetic stirrer of this utility model.

[0046] Figure 7 : A schematic diagram of the electromagnetic coil winding of the multi-section end electromagnetic stirrer described in this utility model.

[0047] Figure 8 : A top plate assembly diagram of the multi-section end electromagnetic stirrer described in this utility model.

[0048] Figure 9 : A diagram of the cooling water chamber assembly of the multi-section end electromagnetic stirrer described in this utility model.

[0049] Figure 10 : A diagram of the terminal plate assembly of the multi-section end electromagnetic stirrer described in this utility model.

[0050] Figure 11 : A diagram of the junction box assembly of the multi-section end electromagnetic stirrer described in this utility model.

[0051] Figure 12 : A schematic diagram of the assembly of the multi-section end electromagnetic stirrer described in this utility model.

[0052] Figure 13 : A schematic diagram of the high-temperature cable connection of the multi-section end electromagnetic stirrer described in this utility model.

[0053] Figure 14 : Schematic diagram of the molten steel flow field stirred by the multi-section end electromagnetic stirrer of this utility model.

[0054] In the diagram: 1. Outer shell assembly; 11. Outer shell bottom plate; 12. Outer shell side plate; 13. Core mounting base; 14. Outer shell flange; 2. Shielding assembly; 21. Shielding side plate; 22. Shielding top plate; 3. Core assembly; 31. Core lamination; 32. Core clamping plate; 33. Core end face; 34. Core mounting block; 35. Electromagnetic coil; 4. Top plate assembly; 41. Mounting plate; 42. Reinforcing plate; 43. Outer shell top plate; 5. Water distribution assembly; 51. Quick-connect water pipe; 52. Water distribution box; 53. Water distribution pipe; 6. Cooling water chamber assembly; 61. Cooling water chamber lower flange; 62. Cooling water chamber side plate; 63. Cooling water chamber upper flange; 7. Terminal block assembly; 71. Terminal block; 72. Terminal waterproof plug; 73. Wiring screw; 74. Bolt fastener; 75. Wiring lug; 8. Junction box assembly; 81. Junction box flange; 82. Junction box side plate; 83. Junction box side cover plate; 84. Junction box top cover plate; 85. High temperature cable waterproof plug; 86. Pneumatic wrench connector; 9. Internal cable. Detailed Implementation

[0055] 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.

[0056] like Figure 1-14 As shown, in order to facilitate understanding of the above technical solution of this utility model, the above technical solution of this utility model will be described in detail below through specific usage methods.

[0057] The multi-section end electromagnetic stirrer includes a sealed cavity, inside which are provided corresponding shielding components 2 and iron core components 3. The shielding components 2 surround the non-working surface of the iron core components 3 to achieve magnetic field shielding of the non-working surface of the iron core components 3.

[0058] The top of the sealed cavity is provided with a water distribution component 5 that rationally distributes cooling water to the iron core assembly 3;

[0059] A cylindrical cooling water chamber assembly 6 is also provided at the middle position of the top of the sealed cavity, and a terminal plate assembly 7 is detachably connected to the top of the cooling water chamber assembly 6.

[0060] The sealed cavity has an opening at its top. An internal cable 9 extends from the core assembly 3, passes through the cavity opening and cooling water chamber assembly 6, and is electrically connected to a terminal block assembly 7. The terminal block assembly 7 is also electrically connected to an external frequency converter power supply. In practice, the core assembly 3 receives power from the frequency converter power supply via the internal cable 9 and terminal block assembly 7, thereby generating a traveling wave magnetic field in the molten steel billet to be stirred. Under the influence of the magnetic field, eddy currents are generated in the molten steel billet. The magnetic field exerts a Lorentz force—i.e., electromagnetic thrust—on the eddy currents, which stirs the molten steel billet, thus improving the quality of the billet. The cavity opening is preferably located in the middle of the top of the sealed cavity.

[0061] In one feasible embodiment, the sealed cavity is formed by an outer shell assembly 1 and a top plate assembly 4, wherein the top of the outer shell assembly 1 is detachably connected to the bottom of the top plate assembly 4.

[0062] In one feasible embodiment, the outer casing assembly 1 includes an outer casing base plate 11, an outer casing side plate 12 enclosing the top of the outer casing base plate 11, a core mounting seat 13 corresponding to the core assembly 3 on the inner side wall of the outer casing side plate 12, and an outer casing flange 14 on the top of the outer casing side plate 12. The outer casing flange 14 and the top plate assembly 4 are detachably connected by threaded holes and bolts. The core assembly 3 is mounted on the core mounting seat 13.

[0063] In one feasible embodiment, the shielding assembly 2 includes a shielding side plate 21 and a shielding top plate 22. The shielding side plate 21 is installed on the inner side wall of the outer shell bottom plate 11, and the shielding top plate 22 is installed at the bottom of the top plate assembly 4. The shielding assembly 2 thereby surrounds the top surface and side surface of the core assembly 3, i.e. the non-working surface of the core assembly 3, and the bottom surface of the core assembly 3 serves as the working surface.

[0064] In one feasible embodiment, the core assembly 3 includes a plurality of stacked core laminations 31, the core laminations 31 being wrapped and fixed by core clamping plates 32 and core end faces 33, the core clamping plates 32 being in close contact with the front and rear sides of the core laminations 31, and the core end faces 33 being in close contact with the left and right sides of the core laminations 31.

[0065] The outer side of the core lamination 31 is provided with a core mounting block 34 corresponding to the core mounting base 13, and the core mounting base 13 and the core mounting block 34 are detachably connected.

[0066] An electromagnetic coil 35 is wound around the core lamination 31 and the core clamp 32, and the electromagnetic coil 35 leads out from the internal cable 9. The electromagnetic coil 35 can be subjected to multiple vacuum impregnation and baking processes to ensure that the electromagnetic coil 35 can operate stably for a long time and maintain good insulation value.

[0067] In one feasible embodiment, the core mounting block 34 and the core mounting base 13 can be detachably connected by threaded holes, bolts or screws, or by snap-fit ​​connection or other means.

[0068] In one feasible embodiment, the top plate assembly 4 includes an outer shell top plate 43, the bottom of which is detachably connected to the outer shell flange 14, and mounting plates 41 are fixedly connected to the left and right ends of the top of the outer shell top plate 43. A reinforcing plate 42 is provided between the mounting plate 41 and the outer shell top plate 43, and the reinforcing plate 42 is fixedly connected to the mounting plate 41 and the outer shell top plate 43 respectively.

[0069] The mounting plate 41 is provided with mounting holes 411 for connecting and fixing to the sector section of the continuous casting machine. In implementation, the mounting plate 41 is connected to the sector section of the continuous casting machine via the mounting holes 411, bolts, etc., thereby installing and fixing the multi-section end electromagnetic stirrer onto the sector section of the continuous casting machine. It can be further reinforced with the outer shell top plate 43 by welding stiffening plates 42. The cavity opening can be formed on the outer shell top plate 43.

[0070] In a feasible embodiment, the mounting hole 411 can be a slotted hole, a threaded hole, a long sliding hole, etc., preferably a slotted hole or a long sliding hole. Because the slotted hole or long sliding hole can adjust the distance between the two opposing multi-section end electromagnetic stirrers by adjusting the relative position of the bolt and the slotted hole, thereby adapting to the metallurgical process requirements of billets of different thicknesses.

[0071] In one feasible embodiment, the stiffening plate 42 is provided with lifting holes 421 to assist in hoisting. The lifting holes 421 can be used to hoist the multi-section end electromagnetic stirrer.

[0072] In one feasible embodiment, the water distribution assembly 5 includes a water distribution box 52, which is installed on the top of the sealed cavity. The water distribution box 52 is connected upward to a water pipe quick connector 51 and downward to a water distribution pipe 53. The water distribution pipe 53 extends downward into the interior of the sealed cavity, and the top of the sealed cavity has a through hole corresponding to the water distribution pipe 53. In implementation, the water distribution box 52 can be installed on the outer shell top plate 43 of the top plate assembly 4, and the through hole can be opened on the outer shell top plate 43. The water distribution box 52 receives cooling water from the outside through the water pipe quick connector 51 and distributes the cooling water reasonably to the internal iron core assembly 3 through the water distribution pipe 53 to avoid the formation of air bubble-free spaces or stagnant water corners inside the sealed cavity. If the above-mentioned drawbacks exist, it will lead to insufficient cooling of the electromagnetic coil 35, and in severe cases, it will cause the electromagnetic coil 35 to burn out due to insufficient cooling.

[0073] In one feasible embodiment, the cooling water chamber assembly 6 includes an enclosing cooling water chamber side plate 62, the bottom of which is connected to a lower cooling water chamber flange 61 and the top of which is connected to an upper cooling water chamber flange 63. In practice, the cooling water chamber assembly 6 can serve as a transition zone between the cooling area (inside the sealed cavity) and the drying area (outside the sealed cavity), and can provide an installation platform for the terminal block assembly 7.

[0074] In one feasible embodiment, the lower flange 61 of the cooling water chamber is detachably connected to the top of the sealing cavity, and the lower flange 61 of the cooling water chamber surrounds the outer edge of the cavity opening.

[0075] In one feasible embodiment, the terminal block assembly 7 is disposed on the upper flange 63 of the cooling water chamber.

[0076] In one feasible embodiment, the terminal block assembly 7 includes a terminal block 71 disposed on top of the cooling water chamber assembly 6.

[0077] In one feasible embodiment, the terminal plate 71 is penetrated by a plurality of wiring screws 73, the terminal plate 71 is provided with terminal plate through holes corresponding to the wiring screws 73 respectively, and the bottom of the wiring screws 73 is electrically connected to the internal cable 9.

[0078] In one feasible embodiment, the top of the terminal block 71 is provided with a waterproof plug 72 to seal the gap between the wiring screw 73 and the through hole of the terminal block.

[0079] In one feasible embodiment, a bolt fastener 74 and a wiring lug 75 are connected to the wiring screw 73;

[0080] In one feasible embodiment, the wiring screw 73 is electrically connected to an external frequency converter power supply via the wiring lug 75. In practice, the terminal block assembly 7 can serve as the interface between the cooling zone (inside the sealed cavity) and the drying zone (outside the sealed cavity), providing an installation platform for the wiring screw 73 and the junction box assembly 8.

[0081] In one feasible embodiment, the terminal block 71 can be detachably connected to the upper flange 6 of the cooling water chamber.

[0082] In one feasible embodiment, the terminal block assembly 7 is detachably covered by the junction box assembly 8.

[0083] In one feasible embodiment, the junction box assembly 8 includes a junction box flange 81, a junction box side plate 82 enclosing the top of the junction box flange 81, a junction box side cover plate 83 on the outer side of the junction box side plate 82, and a junction box top cover plate 84 on the top of the junction box side plate 82. The junction box top cover plate 84 is provided with a blower connector 86 and a high-temperature cable waterproof plug 85 corresponding to the wiring lug 75. In implementation, the wiring lug 75 can be electrically connected to the external frequency converter power supply through an external high-temperature cable. The external high-temperature cable passes through the high-temperature cable waterproof plug 85 and enters the junction box assembly 8 before connecting to the corresponding wiring lug 75, thereby realizing the electrical connection between the iron core assembly 3 and the external frequency converter power supply through the internal cable 9, the wiring screw 73, the wiring lug 75, and the external high-temperature cable.

[0084] The junction box assembly 8 provides a dry environment for the connection between the external high-temperature cable and the multi-section end electromagnetic stirrer. The high-temperature cable waterproof plug 85 can be used to seal the gap between the corresponding external high-temperature cable and the connection lug 75. The air jet connector 86 can serve as an interface for introducing external dry gas into the sealed cavity. The air jet connector 86 can introduce dry compressed air or nitrogen into the sealed cavity, creating positive pressure inside the junction box 52. Because the multi-section end electromagnetic stirrer operates in a harsh environment of high temperature and high humidity, the entry of external moisture will affect the insulation value of the electromagnetic stirrer. Therefore, the junction box assembly 8 is needed as a platform to provide a dry and sealed environment.

[0085] In one feasible embodiment, the junction box flange 81 is detachably connected to the terminal block 71.

[0086] In one feasible embodiment, the top height of the junction box side plate 82 is higher than the height of the wiring lug 75, and there is preferably a gap between the two. The external high-temperature cable passes through the high-temperature cable waterproof plug 85 into the interior of the junction box assembly 8 and then connects to the wiring lug 75.

[0087] Working Principle: The outer casing assembly 1 may include an outer casing base plate 11, an outer casing side plate 12, a core mounting base 13, and an outer casing flange 14. The outer casing base plate 11, outer casing side plate 12, and outer casing flange 14 can be welded together to form a robust, integrated outer casing assembly 1. The core mounting base 13 is welded to the outer casing side plate 12 for subsequent installation of the core assembly 3, and the core assembly 3 is fixed to the outer casing assembly 1 with bolts. Alternatively, according to the installation sequence requirements, the shielding side plate 21 of the shielding assembly 2 can be pre-installed and fixed to the outer casing assembly 1, and the shielding side plate 21 is fixed to the outer casing side plate 12 with bolts. The main function of the outer casing assembly 1 is to house the core assembly 3 and the shielding assembly 2 inside the outer casing assembly 1, forming a robust protective outer casing.

[0088] The shielding assembly 2 may include a shielding side plate 21 and a shielding top plate 22. For ease of actual processing and operation, the shielding assembly 2 can be disassembled into the shielding side plate 21 and the shielding top plate 22, and respectively installed on the outer shell assembly 1 and the top plate assembly 4. The main function of the shielding assembly 2 is to prevent the magnetic field from being lost from the non-working surface of the core assembly 3 by shielding the magnetic field from the non-working surface of the core assembly 3 with a thicker copper plate and concentrating it on the working surface of the core assembly 3, thereby improving the useful power. The working surface is preferably the bottom surface of the core assembly 3, and the non-working surface is preferably the top surface or side surface of the core assembly 3.

[0089] The core assembly 3 may include core laminations 31, core clamping plates 32, core end faces 33, core mounting blocks 34, and an electromagnetic coil 35. The core laminations 31 can be stacked and fixed by the core clamping plates 32. Core end faces 33 are then provided at both ends of the core laminations 31 to further secure them. Core mounting blocks 34 can be provided on the outer surfaces of the core end faces 33 for connection to the core mounting base 13 on the outer casing assembly 1. The electromagnetic coil 35 is wound on the core laminations 31 and the core clamping plates 32. The electromagnetic winding 35 can be done using a Krono winding method. After winding, multiple vacuum impregnation and baking processes can be used to ensure long-term stable operation and maintain good insulation of the electromagnetic coil 35. The electromagnetic coil 35 can be connected to an external frequency converter power supply via an internal cable 9 and a connecting screw 73. Under the action of an external frequency converter, the energized electromagnetic coil 35 generates a traveling wave magnetic field in the molten steel billet to be stirred. The molten steel billet generates eddy currents under the action of the magnetic field. The magnetic field generates Lorentz force on the eddy currents, that is, electromagnetic thrust. The electromagnetic thrust stirs the molten steel billet, thereby achieving the purpose of improving the quality of the billet.

[0090] The winding method of electromagnetic coil 35 can adopt existing technology or refer to the following method: Two electromagnetic sintered wires are wound on the corresponding iron core assembly 3, for a total of 5 coils. The left end is defined as phase V, consisting of coils numbered 1, 3, and 5. The right end is defined as phase U, consisting of coils numbered 2 and 4. Each phase U and V is wound with one complete electromagnetic sintered wire, and there are no joints in the middle of each electromagnetic sintered wire. Looking from phase U to phase V, the winding directions of coils 1 to 5 are clockwise, clockwise, counterclockwise, counterclockwise, and clockwise, respectively. The winding method is as follows: Figure 7 As shown.

[0091] In practice, two multi-section end electromagnetic stirrers are often required, mounted opposite each other on both sides of the billet steel flow. They are connected in series, which can be achieved through an intermediate junction box. Figure 13 As shown. Figure 13A schematic diagram of the cable connections for the multi-section end electromagnetic stirrers is shown. The internal cables of the two multi-section end electromagnetic stirrers can be grouped into inner arc cables and outer arc cables according to their relative control of the molten steel flow in the billet; this is existing technology. During operation, the electromagnetic thrust generated by the two end electromagnetic stirrers is in the same direction, causing the molten steel to flow in a regular pattern. A detailed flow field diagram of the molten steel flow can be found in [reference needed]. Figure 14 ---The thick arrow indicates the overall flow direction of the steel flow in the billet, that is, from one side to the other; when viewed from above, the local steel flow on both sides of the billet shows a circulation pattern.

[0092] The top plate assembly 4 may include a mounting plate 41, a stiffening plate 42, and an outer shell top plate 43. The mounting plate 41 can be welded onto the top plate assembly 4, and the mounting plate 41 can be installed and fixed to the sector section of the continuous casting machine. It can also be fastened with bolts by welding the stiffening plate 42. The top plate assembly 4 and the outer shell assembly 1 together can form a complete sealed cavity, completely enclosing the core assembly 3 and the shielding assembly 2 within the sealed cavity.

[0093] The water distribution assembly 5 may include a quick-connect water pipe 51, a water distribution box 52, and a water distribution pipe 53. The water distribution assembly 5 can be installed on the top plate assembly 4. It can rationally distribute cooling water to the internal iron core assembly 3 to prevent the formation of air bubbles or stagnant water corners within the internal cavity. If these drawbacks exist, the electromagnetic coil 35 will not cool sufficiently, and in severe cases, it may burn out due to insufficient cooling.

[0094] The cooling water chamber assembly 6 may include a lower cooling water chamber flange 61, a side cooling water chamber plate 62, and an upper cooling water chamber flange 63. These three components may be fixedly connected or detachably connected. The fixed connection may be welded. The cooling water chamber assembly 6 can serve as a transition area between the cooling zone (inside the sealed cavity) and the drying zone (outside the sealed cavity), and can also provide an installation platform for the terminal block assembly 7.

[0095] The terminal block assembly 7 may include a terminal block 71, a waterproof terminal plug 72, and a wiring screw 73. The terminal block assembly 7 can serve as the interface between the cooling zone (inside the sealed cavity) and the drying zone (outside the sealed cavity), and can provide an installation platform for the wiring screw 73 and the junction box assembly 8.

[0096] The junction box assembly 8 may include a junction box flange 81, a junction box side plate 82, a junction box side cover 83, a junction box cover 84, a high-temperature cable waterproof plug 85, and a pneumatic wrench connector 86. The junction box assembly 8 provides a dry environment for the connection between the external high-temperature cable and the multi-section end electromagnetic stirrer. The high-temperature cable waterproof plug 85 is used to seal the gap between the high-temperature cable and the stirrer. The pneumatic wrench connector 86 is an interface for external access to drying gas. When dry compressed air or nitrogen is introduced, positive pressure is created inside the junction box. The electromagnetic stirrer operates in a harsh environment of high temperature and high humidity; if external moisture enters, it will affect the insulation value of the electromagnetic stirrer. Therefore, the junction box assembly 8 is needed as a platform to provide a dry and sealed environment.

[0097] In summary, through the aforementioned unique technical solution, this product utilizes a modular electromagnetic stirrer structure, resulting in a compact design that avoids significant modifications to the fan-shaped section. It is easy to install and allows for flexible adjustments; its adaptability accommodates the metallurgical needs of various cross-section cast billets; and its shielding function effectively reduces magnetic leakage, making it more energy-efficient and environmentally friendly. This product involves pairing and installing the modified multi-section end electromagnetic stirrer to the predetermined position on the fan-shaped section, connecting the cooling water, electrical, and drying gas interfaces, and then powering it on for operation.

[0098] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. A combined multi-section end electromagnetic stirrer, characterized in that, It includes a sealed cavity, inside which are provided corresponding shielding components (2) and iron core components (3), the shielding components (2) surrounding the non-working surface of the iron core components (3); The top of the sealed cavity is provided with a water distribution component (5) that rationally distributes cooling water to the iron core assembly (3); A cylindrical cooling water chamber assembly (6) is also provided at the middle position of the top of the sealed cavity, and a terminal plate assembly (7) is detachably connected to the top of the cooling water chamber assembly (6); The sealed cavity has a cavity opening at the top. The iron core assembly (3) leads out an internal cable (9). The internal cable (9) passes upward through the cavity opening and the cooling water chamber assembly (6) and is electrically connected to the terminal board assembly (7). The terminal board assembly (7) is also electrically connected to an external frequency converter power supply.

2. The multi-section end electromagnetic stirrer as described in claim 1, characterized in that, The sealed cavity is formed by the enclosure assembly (1) and the top plate assembly (4), and the top of the enclosure assembly (1) is detachably connected to the bottom of the top plate assembly (4).

3. The multi-section end electromagnetic stirrer as described in claim 2, characterized in that, The outer casing assembly (1) includes an outer casing base plate (11), the top of the outer casing base plate (11) is provided with an enclosing outer casing side plate (12), the inner side wall of the outer casing side plate (12) is provided with a core mounting seat (13) corresponding to the core assembly (3), the top of the outer casing side plate (12) is provided with an outer casing flange (14), and the outer casing flange (14) and the top plate assembly (4) are detachably connected by threaded holes and bolts; The core assembly (3) is mounted on the core mounting base (13).

4. The multi-section end electromagnetic stirrer as described in claim 3, characterized in that, The shielding assembly (2) includes a shielding side plate (21) and a shielding top plate (22). The shielding side plate (21) is installed on the inner side wall of the bottom plate (11) of the outer shell, and the shielding top plate (22) is installed at the bottom of the top plate assembly (4). The shielding assembly (2) thereby surrounds the top and side surfaces of the core assembly (3) - that is, the non-working surfaces of the core assembly (3), and the bottom surface of the core assembly (3) serves as the working surface.

5. The multi-section end electromagnetic stirrer as described in claim 3, characterized in that, The core assembly (3) includes several stacked core laminations (31), which are wrapped and fixed by core clamps (32) and core end faces (33). The core clamps (32) are close to the front and rear sides of the core laminations (31), and the core end faces (33) are close to the left and right sides of the core laminations (31). The outer side of the core lamination (31) is provided with a core mounting block (34) corresponding to the core mounting seat (13), and the core mounting seat (13) and the core mounting block (34) are detachably connected. The core lamination (31) and core clamp (32) are surrounded by an electromagnetic coil (35), and the electromagnetic coil (35) leads out the internal cable (9).

6. The multi-section end electromagnetic stirrer as described in claim 3, characterized in that, The top plate assembly (4) includes an outer shell top plate (43), the bottom of which is detachably connected to the outer shell flange (14), and mounting plates (41) are fixedly connected to the left and right ends of the top of the outer shell top plate (43). A reinforcing plate (42) is provided between the mounting plate (41) and the outer shell top plate (43), and the reinforcing plate (42) is fixedly connected to the mounting plate (41) and the outer shell top plate (43) respectively. The mounting plate (41) is provided with mounting holes (411) for connecting and fixing with the sector section of the continuous casting machine.

7. The multi-section end electromagnetic stirrer as described in claim 1, characterized in that, The water distribution assembly (5) includes a water distribution box (52), which is installed on the top of the sealed cavity. The water distribution box (52) is connected to a water pipe quick connector (51) at the top and to a water distribution pipe (53) at the bottom. The water distribution pipe (53) extends downward into the interior of the sealed cavity. The top of the sealed cavity is provided with a through hole corresponding to the water distribution pipe (53).

8. The multi-section end electromagnetic stirrer as described in claim 1, characterized in that, The cooling water chamber assembly (6) includes an enclosing cooling water chamber side plate (62), the bottom of which is connected to a cooling water chamber lower flange (61) and the top of which is connected to a cooling water chamber upper flange (63). The lower flange (61) of the cooling water chamber is detachably connected to the top of the sealing cavity, and the lower flange (61) of the cooling water chamber surrounds the outer edge of the cavity opening; The terminal block assembly (7) is mounted on the upper flange (63) of the cooling water chamber.

9. The multi-section end electromagnetic stirrer as described in claim 1, characterized in that, The terminal block assembly (7) includes a terminal block (71) disposed on top of the cooling water chamber assembly (6); The terminal plate (71) is penetrated by a number of wiring screws (73). The terminal plate (71) is provided with terminal plate through holes corresponding to the wiring screws (73). The bottom of the wiring screws (73) is electrically connected to the internal cable (9). The top of the terminal plate (71) is provided with a waterproof plug (72) to seal the gap between the wiring screws (73) and the terminal plate through holes. The wiring screw (73) is connected to a bolt fastener (74) and a wiring lug (75); The wiring screw (73) is electrically connected to an external frequency converter power supply through the wiring lug (75).

10. The multi-section end electromagnetic stirrer as described in claim 9, characterized in that, The terminal block assembly (7) is detachably covered with a junction box assembly (8); The junction box assembly (8) includes a junction box flange (81), the top of the junction box flange (81) is provided with an enclosing junction box side plate (82), the outer side surface of the junction box side plate (82) is provided with a junction box side cover plate (83), and the top of the junction box side plate (82) is provided with a junction box top cover plate (84). The junction box top cover (84) is provided with a blower connector (86) and a high-temperature cable waterproof plug (85) corresponding to the wiring lug (75).

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