Electric roaster with adjusting function for casting ladle

Abstract

The invention discloses a casting ladle electric roaster with an adjusting function, and relates to the technical field of casting ladles, the casting ladle electric roaster comprises a support frame and a casting ladle placed on the inner side of the support frame, and the inner side of the support frame is located above the casting ladle and is provided with a tray driven by a driver; the electromagnetic coil is arranged on the inner side of the tray; the adjusting assistor is located on the inner side of the tray and used for conducting tightening or releasing adjustment on the electromagnetic coil. By arranging the adjusting assistor, winding the coil through the driving motor to reduce the distance and cooperating with the adjusting column for guiding and limiting, the magnetic field intensity of the center of the casting ladle can be directionally improved, the overall temperature difference of the casting ladle is controlled within 20 DEG C, the differential heating requirements of large and small casting ladles can be met, a special coil does not need to be replaced, and the cost is reduced. And the baking requirements of low-temperature drying, medium-temperature preheating and high-temperature roasting stages can be met, damage to a refractory layer is avoided, the heating efficiency is improved, and the equipment purchase and maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of ladle technology, specifically to an electric baking device for ladle with adjustable function. Background Technology

[0002] Ladles are used for casting operations in foundry workshops. After receiving molten metal in front of the furnace, they are transported by crane to the mold for pouring. There are various styles, including molten iron ladle, molten steel ladle, teapot ladle, and ductile iron ladle. The ladle's lifting rod and ring are forged, which is stronger and safer than cutting ordinary steel plates. A special electric heating device is required before using the liquid inside the ladle.

[0003] As a core piece of equipment for transferring molten metal in the metallurgical and casting industries, the quality of the drying, preheating, and firing of the refractory layer of the ladle directly determines the safety and stability of the casting operation. Currently, the industry commonly uses fixed vortex-type electromagnetic induction heaters to heat the ladles. The electromagnetic coils of this type of equipment are mostly of fixed spacing and fixed shape, and can only generate a single horizontal radiating magnetic field.

[0004] In practical applications, fixed-structure electromagnetic heating devices have gradually revealed several technical shortcomings: First, the magnetic field distribution exhibits a "stronger at the edges, weaker at the center" characteristic, resulting in a much lower heating rate in the center of large-diameter ladles compared to the edges. This leads to uneven sintering of the refractory layer, and residual moisture can easily cause splashing during pouring. Second, the coil shape is not adjustable, making it impossible to adapt to the heating requirements of ladles of different capacities. Companies need to equip each ladle with a dedicated heating device, resulting in high equipment procurement and maintenance costs. Third, for ladles with refractory layer repairs at the bottom center, the fixed magnetic field makes it difficult to provide targeted and enhanced heating to the repaired area. This results in a weak bond between the old and new refractory layers, making them prone to cracking and detachment during use. Therefore, we provide an adjustable electromagnetic heating device for ladles to address these issues. Summary of the Invention The purpose of this invention is to provide an electric baking device for ladles with adjustable function, in order to solve the problem that the electromagnetic coil used in the electromagnetic baking device for ladles has a fixed shape and cannot be adjusted according to the usage requirements, resulting in the magnetic field range of the ladles being "strong at the edges and weak in the center" during the baking process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an electric baking device for ladles with adjustable function, comprising: a support frame and a ladle placed inside the support frame, wherein a tray is driven by a driver on the inner side of the support frame above the ladle; an electromagnetic coil disposed inside the tray; an adjusting auxiliary device located inside the tray for tightening or releasing the electromagnetic coil, the adjusting auxiliary device comprising multiple adjusting columns disposed inside the tray, each adjusting column having an annular sleeve fixedly connected to one side, the annular sleeve supporting the electromagnetic coil so that the electromagnetic coil can be coiled in a spiral state; a stepped adjusting component located inside the tray for cooperating with the adjusting auxiliary device to form a stepped adjustment of the adjusting columns; and a longitudinal adjusting mechanism located between the electromagnetic coil and the tray for adjusting the state of the electromagnetic coil.

[0006] As a further embodiment of the present invention: the adjustment aid further includes a plurality of slide grooves formed on the inner side of the tray, a movable block is slidably connected to the inner side of the slide groove, a connecting spring is installed between the movable block and the slide groove, the adjustment column is rotatably connected to the bottom of the movable block, and a limiting component for limiting the adjustment column is provided above the adjustment column.

[0007] As a further embodiment of the present invention: a rotating sleeve is rotatably connected to the bottom of the tray, a winding sleeve is provided on the outer wall of the rotating sleeve, a shield is fixedly connected to the top of the tray, a drive motor is installed inside the shield, a connecting shaft is fixedly connected to the output end of the drive motor, one end of the connecting shaft passes through the inner side of the tray and is fixedly connected to the rotating sleeve, and one end of the electromagnetic coil is fixedly connected to the outer wall of the winding sleeve.

[0008] As a further embodiment of the present invention: the movable block is fixedly connected to both sides of the movable block, and a limiting groove matching the limiting block is provided on the inner side of the sliding groove. The movable block is slidably connected to the sliding groove through the limiting blocks fixedly connected to both sides.

[0009] As a further embodiment of the present invention: the longitudinal adjustment mechanism includes a second electric push rod installed inside the rotating sleeve, the output end of the second electric push rod is fixedly connected to a crossbar, the crossbar is fixedly connected to the winding sleeve, and a rectangular groove matching the crossbar is opened on the inner side of the rotating sleeve.

[0010] As a further embodiment of the present invention: the limiting component includes a first electric push rod installed inside the shield, the output end of the first electric push rod extending through to the inside of the tray and fixedly connected to a power plate, and a plurality of plug-in blocks fixedly connected to the bottom of the power plate, each of the plurality of plug-in blocks being arranged one above a movable block.

[0011] As a further embodiment of the present invention: the limiting component further includes an inclined surface formed on the inner side of the moving block, a suspension frame is fixedly connected to the bottom of the plug block, a power wheel is rotatably connected to the inner side of the suspension frame, and the power wheel abuts against the inclined surface.

[0012] As a further embodiment of the present invention: the stepped adjustment component includes a power plate composed of multiple spiral arc plates, and the outermost arc plate is fixedly connected to the bottom of the tray by a bracket, the innermost arc plate is fixedly connected to the output end of the first electric push rod, and a rectangular rod is fixedly connected to the top of the first end of each of the remaining arc plates. One end of the rectangular rod extends through the inner side of the shield and is slidably connected to the shield. A ring is fixedly connected to the top of the rectangular rod, and a power spring is installed between the ring and the shield. A pressure plate and an L-shaped lifting block are fixedly connected to the top and bottom of the tail ends of the multiple arc plates, respectively, and the pressure plate is attached to the top of the next arc plate, and the L-shaped lifting block is located below the next arc plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting an adjustment auxiliary device, the spacing of the drive motor winding coil is reduced and the adjustment column guides and limits the direction, which can directionally increase the magnetic field strength of the center of the ladle and control the overall temperature difference of the ladle within 20℃. It can adapt to the different heating needs of large and small ladles without replacing the special coil, and can match the baking requirements of each stage of low temperature drying, medium temperature preheating and high temperature firing, avoid damage to the refractory layer, improve heating efficiency and reduce equipment purchase and maintenance costs. 2. By setting up a second electric push rod and other parts, the second electric push rod drives the winding sleeve to move down, so that the two coils of electromagnetic coils at the center of the rotating sleeve, which are not limited, form a boss-type vortex state, thereby realizing the directional focusing of the magnetic field at the center of the ladle. This can not only accelerate the sintering of the refractory layer repair area at the bottom center of the ladle and prevent cracking and falling off during pouring, but also reduce the magnetic field coverage area and improve the energy-saving efficiency of heating small-capacity ladles. 3. By setting a stepped adjustment component, the stepped adjustment component gradually releases the adjustment column limit, realizing a step-by-step reduction in coil spacing and a gradient increase in magnetic field strength. This effectively avoids the problem of refractory layer cracking or over-sintering caused by sudden temperature changes, and controls the ladle temperature fluctuation within 10℃. At the same time, it makes the electromagnetic coil form a gradient coil shape of "dense in the center and sparse at the edges", which accurately matches the differentiated requirements of strong heat in the center and uniform heat at the edges of the ladle, and can be accurately adapted to each stage of low temperature drying, medium temperature preheating and high temperature firing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the inner structure of the tray of the present invention; Figure 3 This is a schematic diagram of the adjustment aid structure of the present invention; Figure 4 This is an exploded view of the power plate and connector block of the present invention; Figure 5 This is a schematic diagram of the power plate structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle; Figure 7 This is an exploded view of the rotating sleeve and the winding sleeve of the present invention; Figure 8 This is a cross-sectional view of the movable block of the present invention; Figure 9 This is a schematic diagram of the annular sleeve supporting the electromagnetic coil according to the present invention.

[0015] In the diagram: 1. Support frame; 2. Ladle; 3. Tray; 4. Driver; 5. Rotating sleeve; 6. Electromagnetic coil; 7. Slide groove; 8. Adjusting column; 9. Rewinding sleeve; 10. Power plate; 11. Drive motor; 12. Shielding cover; 13. Connecting shaft; 14. Rectangular rod; 15. Ring; 16. Power spring; 17. First electric push rod; 18. Moving block; 19. Insertion block; 20. Connecting spring; 21. Pressure plate; 22. L-shaped lifting block; 23. Crossbar; 24. Suspension frame; 25. Power wheel; 26. Inclined surface; 27. Second electric push rod. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0018] Please see Figures 1-9This embodiment provides an electric baking device for ladles with adjustable function, including: a support frame 1 and a ladle 2 placed inside the support frame 1. The inner side of the support frame 1, above the ladle 2, is driven by a driver 4 to a tray 3; an electromagnetic coil 6 is disposed inside the tray 3; and an adjustment auxiliary device, located inside the tray 3, is used to tighten or loosen the electromagnetic coil 6. The adjustment auxiliary device includes multiple adjustment columns 8 disposed inside the tray 3, each adjustment column 8 having an annular sleeve fixedly connected to one side. The annular sleeve supports the electromagnetic coil 6, allowing the electromagnetic coil 6 to coil in a spiral state. A longitudinal adjustment mechanism is installed between the electromagnetic coil 6 and the tray 3 to adjust the state of the electromagnetic coil 6. The adjustment aid also includes multiple slide grooves 7 formed on the inner side of the tray 3. A moving block 18 is slidably connected to the inner side of the slide groove 7. A connecting spring 20 is installed between the moving block 18 and the slide groove 7. An adjusting column 8 is rotatably connected to the bottom of the moving block 18. A limiting component for limiting the adjusting column 8 is provided above the adjusting column 8. A rotating sleeve 5 is rotatably connected to the bottom of the tray 3. A winding sleeve 9 is provided on the outer wall of the rotating sleeve 5. A shielding cover 12 is fixedly connected to the top of the tray 3. The shielding cover 12 is installed inside the tray 3. A drive motor 11 is provided, and a connecting shaft 13 is fixedly connected to the output end of the drive motor 11. One end of the connecting shaft 13 passes through the inner side of the tray 3 and is fixedly connected to the rotating sleeve 5. One end of the electromagnetic coil 6 is fixedly connected to the outer wall of the take-up sleeve 9. Limiting blocks are fixedly connected to both sides of the moving block 18. A limiting groove matching the limiting blocks is opened on the inner side of the slide groove 7. The moving block 18 is slidably connected to the slide groove 7 through the limiting blocks fixedly connected to both sides. The longitudinal adjustment mechanism includes a second electric push rod 27 installed inside the rotating sleeve 5. A crossbar 23 is fixedly connected to the output end of the second electric push rod 27. The crossbar 23 is fixedly connected to the take-up sleeve 9. The inner side of the rotating sleeve 5 is provided with a rectangular groove that matches the crossbar 23. The limiting component includes a first electric push rod 17 installed inside the shield 12. The output end of the first electric push rod 17 passes through the inner side of the tray 3 and is fixedly connected to a power plate 10. The bottom of the power plate 10 is fixedly connected to a plurality of plug-in blocks 19. Each of the plug-in blocks 19 is arranged above a moving block 18. The limiting component also includes an inclined surface 26 opened inside the moving block 18. The bottom of the plug-in block 19 is fixedly connected to a suspension frame 24. The inner side of the suspension frame 24 is rotatably connected to a power wheel 25, and the power wheel 25 abuts against the inclined surface 26. First, how the drive 4 adjusts the height of the tray 3 is existing technology, so it is not elaborated on in this solution. When it is necessary to adjust the density of the electromagnetic coil 6, the first electric push rod 17 can be started first. The output end of the first electric push rod 17 drives the power plate 10 to move upward, thereby causing the plug block 19 to drive the power wheel 25 to move upward, so that the power wheel 25 gradually separates from the inclined surface 26. At this time, the drive motor 11 is started. The output end of the drive motor 11 drives the rotating sleeve 5 to rotate the winding sleeve 9, thereby winding the electromagnetic coil 6. This causes the electromagnetic coil 6 to push the adjusting column 8 to move towards the center position of the rotating sleeve 5 for winding, thereby reducing the spacing between the coils of the electromagnetic coil 6 that were originally in a vortex state. According to the principle of electromagnetic induction, the increase in the number of coil turns per unit area will directly increase the magnetic field strength. Therefore, the magnetic field strength in the center area of ​​the ladle can be increased, which can accurately solve the pain point of "weak magnetic field and slow heating in the center area" of large-diameter ladles, making the heating rate of the center and edge of the ladle tend to be consistent, and the overall temperature difference is controlled within 20℃. At the same time, by reducing the spacing by winding the electromagnetic coil, the magnetic field is concentrated on the central area of ​​the small ladle, avoiding energy waste caused by magnetic field diffusion. In addition, there is no need to replace the special coil, reducing equipment procurement and maintenance costs. By controlling the winding amplitude, the coil spacing can be precisely adjusted to balance the central magnetic field strength and the coverage of the edge magnetic field. Combined with the guiding effect of the adjustment column, it can be ensured that the sidewalls and center of the large ladle are heated synchronously. During the low-temperature drying stage of the ladle, the coil is kept in a loose state. The magnetic field has a large coverage area and low intensity, and is only used to remove moisture from the surface of the ladle to avoid local overheating that could cause the refractory layer to crack. During the medium-temperature preheating or high-temperature firing stage of the ladle, the spacing of the winding coil is reduced to strengthen the central magnetic field, compensate for the heat loss at the bottom of the ladle, ensure that the refractory layer is fully sintered, and improve the high-temperature resistance of the ladle. Two turns of the electromagnetic coil 6, located near the center of the rotating sleeve 5, are not limited by the adjusting column 8. When it is necessary to adjust the spiral state of the electromagnetic coil 6 to a boss shape, the second electric push rod 27 is activated. The output end of the second electric push rod 27 drives the winding sleeve 9 to move the electromagnetic coil 6 downward, thereby adjusting the electromagnetic coil 6 into a boss-shaped spiral state. The magnetic field in this area will be closer to the central axis of the ladle, achieving directional focusing of the central magnetic field. For the refractory layer repair area at the bottom center of the ladle, the enhanced central magnetic field can concentrate heat to accelerate the sintering of the repair layer, ensuring a tight bond between the new and old refractory layers and preventing cracking and detachment during pouring. For small-capacity ladles, the boss structure can reduce the magnetic field coverage area, preventing energy from diffusing outward and improving energy efficiency.

[0019] Please see Figures 3-8A stepped adjustment component, located inside the tray 3, is used to cooperate with the adjustment auxiliary device to form a stepped adjustment of the adjustment column 8. The stepped adjustment component includes a power plate 10 composed of multiple vortex-shaped arc plates. The outermost arc plate is fixedly connected to the bottom of the tray 3 by a bracket. The innermost arc plate is fixedly connected to the output end of the first electric push rod 17. A rectangular rod 14 is fixedly connected to the top of the first end of each of the remaining arc plates. One end of the rectangular rod 14 extends through the inner side of the shield 12 and is slidably connected to the shield 12. A ring 15 is fixedly connected to the top of the rectangular rod 14. A power spring 16 is installed between the ring 15 and the shield 12. A pressure plate 21 and an L-shaped lifting block 22 are fixedly connected to the top and bottom of the tail ends of the multiple arc plates, respectively. The pressure plate 21 is attached to the top of the next arc plate, and the L-shaped lifting block 22 is set below the next arc plate. When it is necessary to adjust the spiral state of the electromagnetic coil 6 in a stepped manner, the first electric push rod 17 can be divided into multiple segments under the control of the PLC controller. When the first segment drives one of the arc plates to move upward, it first releases part of the plug-in block 19 from limiting the adjustment column 8. When it is necessary to rewind, the output end of the first electric push rod 17 continues to move upward, so that when the L-shaped lifting block 22 contacts the next arc block, it will continue to drive the plug-in block 19 at the bottom of the next arc block to separate from the adjustment column 8. In sequence, multiple plug-in blocks 19 can gradually disengage from limiting the adjustment column 8, so that the limited adjustment column 8 can limit the coil position of the electromagnetic coil 6 in the spiral state. This design allows multiple plug blocks to gradually disengage from the limiting posts of the adjusting columns. Each time a set of adjusting columns is released, only a small section of the coil in the corresponding area is allowed to contract, resulting in a step-like reduction in coil spacing and a gradual increase in magnetic field strength, rather than an abrupt change. This design allows for smoother temperature changes in the ladle, preventing cracking of the refractory layer or excessive local sintering caused by a sudden increase in magnetic field, and keeping temperature fluctuations in the ladle within 10°C. By gradually releasing the limiting position of the center and edge adjustment columns, the coil can shrink from the inside to the outside, forming a gradient coil structure with "dense in the center and sparse at the edges", which matches the differentiated baking requirements of the ladle, which requires "strong heat in the center and uniform heat at the edges". Low-temperature drying stage: Only a small number of adjustment column limits are released, the coil spacing is slightly reduced, the magnetic field strength is low, and energy waste is avoided; Mid-temperature preheating stage: Continue to release the middle adjustment column limit, the coil further contracts, the magnetic field strength increases, and the uniform preheating requirement is met; High-temperature firing stage: All adjustment column limits are released, the coil spacing is minimized, the magnetic field strength is maximized, and the heat loss at the bottom of the deep cavity ladle is compensated; The entire switching process can be completed automatically via PLC controller without stopping the machine, greatly improving the continuity and automation of the baking operation.

[0020] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An electric baking machine for ladles with adjustable function, characterized in that, include: A support frame (1) and a pouring ladle (2) placed inside the support frame (1), the inside of the support frame (1) being above the pouring ladle (2) and a tray (3) driven by a driver (4). An electromagnetic coil (6) is disposed on the inside of the tray (3); An adjustment aid is located inside the tray (3) and is used to tighten or loosen the electromagnetic coil (6). The adjustment aid includes multiple adjustment columns (8) disposed inside the tray (3). Each adjustment column (8) is fixedly connected to one side of an annular sleeve, which supports the electromagnetic coil (6) so that the electromagnetic coil (6) can be coiled in a spiral state. A stepped adjustment component is located inside the tray (3) and is used to cooperate with the adjustment aid to form a stepped adjustment of the adjustment column (8); A longitudinal adjustment mechanism is located between the electromagnetic coil (6) and the tray (3) for adjusting the state of the electromagnetic coil (6).

2. The electric baking device for ladles with adjustable function according to claim 1, characterized in that, The adjustment aid also includes multiple grooves (7) formed inside the tray (3). A moving block (18) is slidably connected to the inside of the groove (7). A connecting spring (20) is installed between the moving block (18) and the groove (7). The adjustment column (8) is rotatably connected to the bottom of the moving block (18). A limiting component for limiting the adjustment column (8) is provided above the adjustment column (8).

3. The electric baking device for ladles with adjustable function according to claim 2, characterized in that, A rotating sleeve (5) is rotatably connected to the bottom of the tray (3). A winding sleeve (9) is provided on the outer wall of the rotating sleeve (5). A shield (12) is fixedly connected to the top of the tray (3). A drive motor (11) is installed inside the shield (12). A connecting shaft (13) is fixedly connected to the output end of the drive motor (11). One end of the connecting shaft (13) passes through the inner side of the tray (3) and is fixedly connected to the rotating sleeve (5). One end of the electromagnetic coil (6) is fixedly connected to the outer wall of the winding sleeve (9).

4. The electric baking device for ladles with adjustable function according to claim 2, characterized in that, The movable block (18) is fixedly connected to both sides of the limiting block, and the inner side of the slide groove (7) is provided with a limiting slide groove that matches the limiting block. The movable block (18) is slidably connected to the slide groove (7) through the limiting blocks fixedly connected to both sides.

5. The electric baking device for ladles with adjustable function according to claim 3, characterized in that, The longitudinal adjustment mechanism includes a second electric push rod (27) installed inside the rotating sleeve (5). The output end of the second electric push rod (27) is fixedly connected to a crossbar (23). The crossbar (23) is fixedly connected to the winding sleeve (9). The inner side of the rotating sleeve (5) is provided with a rectangular groove that matches the crossbar (23).

6. The electric baking device for ladles with adjustable function according to claim 3, characterized in that, The limiting component includes a first electric push rod (17) installed inside the shield (12). The output end of the first electric push rod (17) extends through to the inside of the tray (3) and is fixedly connected to a power plate (10). The bottom of the power plate (10) is fixedly connected to a plurality of plug-in blocks (19). Each of the plurality of plug-in blocks (19) is arranged above a moving block (18) in a corresponding manner.

7. The electric baking machine for ladles with adjustable function according to claim 6, characterized in that, The limiting component also includes an inclined surface (26) formed inside the movable block (18), a suspension frame (24) is fixedly connected to the bottom of the plug block (19), a power wheel (25) is rotatably connected to the inner side of the suspension frame (24), and the power wheel (25) abuts against the inclined surface (26).

8. An electric baking machine for ladles with adjustable function according to claim 7, characterized in that, The stepped adjustment component includes a power plate (10) composed of multiple spiral arc plates. The outermost arc plate is fixedly connected to the bottom of the tray (3) by a bracket. The innermost arc plate is fixedly connected to the output end of the first electric push rod (17). A rectangular rod (14) is fixedly connected to the top of the first end of each of the remaining arc plates. One end of the rectangular rod (14) extends through the inner side of the shield (12) and is slidably connected to the shield (12). A ring (15) is fixedly connected to the top of the rectangular rod (14). A power spring (16) is installed between the ring (15) and the shield (12). A pressure plate (21) and an L-shaped lifting block (22) are fixedly connected to the top and bottom of the tail ends of the multiple arc plates, respectively. The pressure plate (21) is attached to the top of the next arc plate, and the L-shaped lifting block (22) is located below the next arc plate.

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