Magnetic suspension crystallizer vibration device

Abstract

The utility model relates to the technical field of metallurgy continuous casting production, and discloses a magnetic suspension crystallizer vibration device which comprises a base and a crystallizer body used for containing molten steel, and a magnetic block used for providing magnetic suspension driving force is arranged in the middle area of the upper end of the base. Falling position protection assemblies used for providing buffering support for the crystallizer body during power failure are symmetrically arranged at the positions, close to the edges of the two sides, of the base, and guide assemblies used for conducting guide constraint on the vibration track of the crystallizer body are arranged at the upper ends of the falling position protection assemblies. And the crystallizer body falls under the action of gravity. Falling impact kinetic energy is converted into mechanical energy of mechanism movement, and impact is gradually consumed and dispersed. The air pressure cavity slides relative to the upper buffering main column and the lower buffering main column, the sealing ring keeps the air tightness of the cavity, internal air is compressed to form damping, impact energy is further absorbed and dissipated, and soft landing and buffering supporting of the crystallizer body are achieved.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical continuous casting production technology, specifically to a magnetic levitation crystallizer vibration device. Background Technology

[0002] In the continuous casting process, the crystallizer body, as the core equipment for solidification and forming of molten steel, directly determines the surface quality of the cast billet and the safety of production due to its vibration stability. Currently, the mainstream crystallizer body driving methods are divided into two categories: mechanical vibration and magnetic levitation vibration. Among them, magnetic levitation vibration devices, with their advantages of no mechanical contact, low wear, and wide adjustable range of vibration parameters, are gradually replacing traditional mechanical vibration devices and have become the preferred solution for high-quality continuous casting production.

[0003] In practical applications, existing magnetic levitation crystallizer vibration devices rely on continuous power supply for magnetic levitation driving force. When a sudden power outage or power supply system failure occurs, the magnetic levitation force disappears instantly, and the crystallizer body falls rapidly under its own weight and the gravity of the molten steel inside. Most devices lack a reliable emergency buffer structure, which may lead to a rigid impact between the crystallizer body and the base, resulting in economic losses. Furthermore, during magnetic levitation vibration, the crystallizer body must move strictly in the vertical direction to ensure uniform vibration marks on the surface of the billet. The guide structure of existing devices mostly adopts a single-sided slide rail or simple guide block design, which is difficult to constrain the crystallizer body in all directions, resulting in uneven vibration marks on the surface of the billet and even the risk of steel leakage. Therefore, those skilled in the art provide a magnetic levitation crystallizer vibration device to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a magnetic levitation crystallizer vibration device to solve the problems mentioned in the background section of the prior art.

[0005] This utility model provides the following technical solution: a magnetic levitation crystallizer vibration device, including a base and a crystallizer body for containing molten steel. The upper middle region of the base is provided with a magnetic block for providing magnetic levitation driving force. The base is symmetrically provided with positioning protection components near the two sides of the magnetic block for providing buffer support for the crystallizer body when the power is off. Next to the positioning protection components is a guide component for guiding and constraining the vibration trajectory of the crystallizer body.

[0006] Compared with the prior art, the beneficial effects of this utility model are:

[0007] In normal magnetic levitation operation, the crystallizer body is suspended and vibrates by the electromagnetic force provided by the magnetic blocks, and the drop protection component does not participate in load-bearing. In the event of a power outage, the magnetic force disappears rapidly, and the crystallizer body falls under gravity. At this time, the buffer support plate first supports the crystallizer body, and the impact force is transmitted to the second buffer link through the upper protrusion. The second buffer link rotates around a fixed axis and transmits the force to the slider, which moves along the groove of the side frame, simultaneously driving the first buffer link to rotate around the lower protrusion. This converts the kinetic energy of the falling impact into the mechanical energy of the mechanism, gradually consuming and dispersing the impact. Simultaneously, the air pressure chamber slides relative to the upper and lower buffer columns, the sealing ring maintains the airtightness of the chamber, and the internal gas is compressed to form damping, further absorbing and dissipating the impact energy, achieving a soft landing and buffer support for the crystallizer body, effectively preventing damage to the crystallizer body due to a sudden drop. The frequency, amplitude, and waveform (sine / non-sine) of the vibration can be flexibly set and adjusted online through the intelligent control system software without replacing any mechanical parts, greatly improving the adaptability of the continuous casting process and the quality of the cast billet. Electromagnetic direct drive provides fast response and smooth, accurate vibration waveforms, effectively eliminating the hysteresis, distortion, and impact problems caused by traditional mechanical vibration, thereby generating uniform vibration marks on the surface of the cast billet.

[0008] Based on the aforementioned beneficial effects, this invention features four sliding pillars fixed to the four corners of the outer wall of the crystallizer body and nested inside the corresponding slide rails. The slide rails constrain the sliding pillars through their smooth inner walls, allowing them to slide only in the vertical direction. Baffles prevent the sliding pillars from detaching from the upper end of the slide rails. This structure ensures that the crystallizer body maintains a strictly vertical movement trajectory under any condition, guaranteeing the accuracy and stability of vibration, preventing horizontal deviation or swaying, and preventing uneven vibration marks on the surface of the cast billet. Attached Figure Description

[0009] Figure 1 A three-dimensional structural schematic diagram of a vibration device for a magnetic levitation crystallizer;

[0010] Figure 2 A schematic diagram showing the connection of a positioning protection component for a magnetic levitation crystallizer vibration device;

[0011] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0012] Figure 4 A three-dimensional disassembled diagram of the positioning protection component;

[0013] Figure 5 A three-dimensional anatomical diagram of the guide component of a vibration device for a magnetic levitation crystallizer;

[0014] The meanings of the various reference numerals in the figure are as follows:

[0015] 1. Base; 2. Magnetic block; 3. Positioning protection component; 31. Base plate; 32. Lower protruding column; 33. Buffer connecting rod one; 34. Fixed shaft; 35. Slider; 36. Buffer connecting rod two; 37. Upper protruding column; 38. Buffer support plate; 39. Lower buffer main column; 310. Air pressure chamber; 311. Frame column; 312. Air inlet; 313. Upper buffer main column; 314. Sealing ring; 315. Side frame; 316. Slide groove; 4. Guide component; 41. Slide rail; 42. Baffle; 43. Slide column; 5. Crystallizer body. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Please see Figure 1 As shown, this utility model provides a technical solution: a magnetic levitation crystallizer vibration device, including a base 1 and a crystallizer body 5 for containing molten steel. A magnetic block 2 for providing magnetic levitation driving force is provided in the upper central region of the base 1. A positioning protection component 3 for providing buffer support for the crystallizer body 5 when power is off is symmetrically arranged on the base 1 near the two edges of the magnetic block 2. A guide component 4 for guiding and constraining the vibration trajectory of the crystallizer body 5 is provided next to the positioning protection component 3. See also... Figure 1 There are four sets of guide components 4, located at the four corners, corresponding to the crystallizer body 5.

[0018] To achieve high-frequency and precise vibration of the crystallizer body 5, this device is also equipped with an electromagnetic vibration mechanism (not shown in the figure). The electromagnetic vibration mechanism includes four sets of drive coils symmetrically fixedly installed at the bottom of the crystallizer body 5, and an array of permanent magnets (or electromagnets) embedded in the magnetic block 2 area on the base 1, with the drive coils and the permanent magnet array corresponding to each other.

[0019] To further improve vibration control accuracy, a position sensor (not shown in the figure) is installed between the crystallizer body 5 and the base 1, and an acceleration sensor is installed on the outer wall of the crystallizer body 5. The sensors are electrically connected to an intelligent control system. Based on preset vibration parameters and real-time signals from the sensors, the control system precisely controls the magnitude and direction of the current flowing into the drive coil through a power amplifier, thereby generating the required dynamic electromagnetic vibration force. This force is superimposed on the static levitation force provided by the magnetic block 2, causing the crystallizer body 5 to vibrate stably according to the set trajectory and frequency.

[0020] As one implementation method in this embodiment, please refer to Figures 2-4As shown, the positioning protection component 3 includes a base plate 31, which is fixedly connected to the upper end of the base 1. Two sets of lower protrusions 32 are symmetrically fixedly connected at the middle of the upper end of the base plate 31. A buffer connecting rod 33 is hinged between the two sets of lower protrusions 32. A fixed shaft 34 is rotatably sleeved inside the end of the two buffer connecting rods 33 away from the two sets of lower protrusions 32. A slider 35 is fixedly connected between the two sets of fixed shafts 34.

[0021] The positioning protection component 3 is fixedly connected to the base 1 via the base plate 31. Its lower protrusion 32 is hinged to the buffer connecting rod 33, allowing the buffer connecting rod 33 to rotate around the lower protrusion 32. The other end of the buffer connecting rod 33 is connected to the slider 35 via the fixed shaft 34. The slider 35 can move within a certain range, thereby providing buffer support for the crystallizer body 5 through the movement of the linkage mechanism when the power is off, avoiding rigid impact.

[0022] As one implementation method in this embodiment, please refer to Figures 2-4 As shown, buffer connecting rods 36 are rotatably sleeved on the outer sides of both sets of fixed shafts 34. Each set of buffer connecting rods 36 has an upper protruding post 37 hinged to its end away from the two sets of fixed shafts 34. A buffer support plate 38 is fixedly connected to the upper end of each set of upper protruding posts 37. Preferably, a small working air gap exists between the top surface of the buffer support plate 38 and the bottom surface of the crystallizer body 5. In normal magnetic levitation operation, the crystallizer body is suspended by a magnetic block, and a predetermined gap (e.g., 5-10 mm) is provided between its bottom and the buffer support plate. When power is cut off and the crystallizer body falls, this gap allows it to smoothly contact the buffer support plate.

[0023] Furthermore, the second buffer link 36 is sleeved on the outside of the fixed shaft 34, and its other end is hinged to the upper protrusion 37, which is fixed below the buffer support plate 38. When the crystallizer body 5 falls, the impact force is gradually transmitted and dispersed through the linkage of the first buffer link 33 and the second buffer link 36. The buffer support plate 38 directly bears the weight of the crystallizer body 5, playing a role in stabilizing support and buffering.

[0024] As one implementation method in this embodiment, please refer to Figures 2-4 As shown, a lower buffer main column 39 is fixedly connected to the upper center of the base plate 31. A pneumatic chamber 310 is slidably sleeved on the upper end of the lower buffer main column 39. Frame columns 311 are symmetrically fixedly connected to the outer side of the pneumatic chamber 310. An air inlet 312 is opened at the center of one side wall of the pneumatic chamber 310, and a sealing plug is tightly fitted inside the air inlet 312. An upper buffer main column 313 is slidably sleeved on the upper part of the pneumatic chamber 310. A sealing ring 314 is fixedly sleeved on the lower part of the outer side of the upper buffer main column 313.

[0025] The lower buffer column 39 is fixed to the upper end of the base plate 31, and the air pressure chamber 310 is sleeved on top of it and can slide relative to it. Inside the air pressure chamber 310 is an upper buffer column 313, which is kept airtight by a sealing ring 314. The upper end of the upper buffer column is fixedly connected to the lower part of the buffer support plate. When the buffer support plate is compressed, the upper buffer column moves downward, compressing the gas inside the air pressure chamber. The air inlet 312 can be used to adjust the internal air pressure, thereby controlling the buffer stiffness. When the crystallizer body 5 falls, the air pressure chamber 310, the upper buffer column 313, and the lower buffer column 39 work together to absorb impact energy through air pressure damping.

[0026] As one implementation method in this embodiment, please refer to Figures 2-4 As shown, each of the two frame columns 311 is fixedly connected to a side frame 315 on the side that is far apart from each other, and a groove 316 is provided at the center of the two inner walls of the two side frames 315 that are far apart from each other.

[0027] The side frame 315 is fixed to both sides of the frame post 311. The groove 316 on its inner wall cooperates with the slider 35 to restrict the movement trajectory of the slider 35, ensuring that the buffer linkage mechanism moves within a predetermined range and enhancing the stability and guidance of the drop protection component 3. The groove of the side frame is set vertically, so that the slider can only move vertically within the groove, thereby ensuring that the buffer support plate remains horizontal and moves only in the vertical direction during the buffering process, which is coordinated with the vertical constraint of the guide component.

[0028] As one implementation method in this embodiment, please refer to Figure 5 As shown, the guide assembly 4 includes slide rails 41, which are fixedly connected to the upper end of the base 1 at four opposite corners. Each of the four slide rails 41 has a baffle 42 fixedly connected to its upper end. Each of the four slide rails 41 has a sliding column 43 slidably fitted on its inner side, which is close to each other. Each of the four sliding columns 43 is fixedly connected to the outer wall of the crystallizer body 5.

[0029] The guide assembly 4 is fixed to the base 1 via four diagonally arranged slide rails 41. The sliding column 43 is fixed to the outer wall of the crystallizer body 5 and sleeved inside the slide rails 41, allowing it to slide up and down within the slide rails 41. The baffle 42 prevents the sliding column 43 from falling out, ensuring that the crystallizer body 5 vibrates in the vertical direction, avoiding swaying, and improving the accuracy and stability of the vibration trajectory.

[0030] The working principle of this utility model is as follows: Under normal magnetic levitation operation, the crystallizer body 5 is suspended and vibrates by the electromagnetic force provided by the magnetic block 2, and the drop protection component 3 does not participate in load bearing. When an unexpected power failure occurs, the magnetic force disappears rapidly, and the crystallizer body 5 falls under the action of gravity. At this time, the buffer support plate 38 first supports the crystallizer body 5, and the impact force is transmitted to the second buffer link 36 through the upper protrusion 37. The second buffer link 36 rotates around the fixed axis 34 and transmits the force to the slider 35. The slider 35 moves along the slide groove 316 of the side frame 315, and at the same time drives the first buffer link 33 to rotate around the lower protrusion 32. The impact kinetic energy of the fall is converted into the mechanical energy of the mechanism's movement, gradually consuming and dispersing the impact. At the same time, the air pressure chamber 310 slides relative to the upper buffer column 313 and the lower buffer column 39. The sealing ring 314 maintains the airtightness of the chamber, and the internal gas is compressed to form damping, further absorbing and dissipating the impact energy, realizing a soft landing and buffer support for the crystallizer body 5, and effectively preventing the crystallizer body 5 from being damaged by instantaneous drop.

[0031] Four sliding pillars 43 are fixed to the four corners of the outer wall of the crystallizer body 5 and nested inside the corresponding slide rails 41. The slide rails 41 constrain the sliding pillars 43 through their smooth inner walls, allowing them to slide only in the vertical direction. Baffles 42 prevent the sliding pillars 43 from detaching from the upper end of the slide rails 41. This structure ensures that the crystallizer body 5 maintains a strictly vertical movement trajectory under any condition, guaranteeing the accuracy and stability of vibration, preventing horizontal deviation or swaying, and preventing uneven vibration marks on the surface of the cast billet.

[0032] A detailed explanation of normal levitation and vibration: After the system is powered on, the magnetic block 2 provides a stable static levitation force, suspending the crystallizer body 5 in a balanced position, at which point it is not in contact with the buffer support plate 38 of the positioning protection component 3. The intelligent control system starts, supplying an alternating current that varies according to a specific waveform (such as a sine wave) to the drive coil. This current experiences a Lorentz force in the static magnetic field of the permanent magnet array, which is the excitation force driving the crystallizer to vibrate. Position sensors and acceleration sensors monitor the vibration state in real time and feed it back to the controller. The controller continuously adjusts the output current through a closed-loop algorithm (such as PID control) to ensure the vibration waveform is accurate. Throughout the vibration process, the slide rail 41 and slide column 43 of the guide component 4 strictly constrain the crystallizer body 5 to only move vertically.

[0033] The power failure protection is described in detail as follows: In the event of a power failure, the levitation force of the magnetic block 2 and the vibration force of the drive coil disappear simultaneously. The crystallizer body 5 falls under gravity and is supported by the buffer support plate 38. The impact energy is absorbed through the linkage mechanism and the pneumatic damping chamber, achieving a soft landing. The newly added electromagnetic vibration mechanism does not affect the normal operation of the landing protection components.

[0034] It should be noted that the vibration frequency, amplitude, and waveform (sine / non-sine) can all be flexibly set and adjusted online through the intelligent control system software without replacing any mechanical parts, greatly improving the adaptability of the continuous casting process and the quality of the cast billet. Electromagnetic direct drive provides a fast response speed and produces a smooth and accurate vibration waveform, effectively eliminating the hysteresis, distortion, and impact problems caused by traditional mechanical vibration, thus generating uniform vibration marks on the cast billet surface. The electromagnetic vibration mechanism (drive coil and permanent magnet array) is cleverly integrated into the existing levitation space, without occupying additional equipment space, achieving both enhanced functionality and structural simplicity.

[0035] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A magnetic levitation crystallizer vibration device, comprising a base (1) and a crystallizer body (5) for containing molten steel, characterized in that, The upper middle area of ​​the base (1) is provided with a magnetic block (2) for providing magnetic levitation driving force. The base (1) is symmetrically provided with a positioning protection component (3) for providing buffer support for the crystallizer body (5) when the power is off at the two sides of the magnetic block (2). Next to the positioning protection component (3) is a guide component (4) for guiding and constraining the vibration trajectory of the crystallizer body (5).

2. The magnetic levitation crystallizer vibration device according to claim 1, characterized in that, The positioning protection component (3) includes a base plate (31), which is fixedly connected to the upper end of the base (1). Two sets of lower protrusions (32) are symmetrically connected at the upper end of the base plate (31) near the middle position. Both sets of lower protrusions (32) are hinged with buffer connecting rods (33). The ends of the two buffer connecting rods (33) away from the two sets of lower protrusions (32) are rotatably fitted with fixed shafts (34). Both sets of fixed shafts (34) are connected with sliders (35).

3. The magnetic levitation crystallizer vibration device according to claim 2, characterized in that, The outer sides of the two sets of fixed shafts (34) are respectively fitted with buffer connecting rods (36), and the ends of the two sets of buffer connecting rods (36) away from the two sets of fixed shafts (34) are hinged with upper protrusions (37), and the upper ends of the two sets of upper protrusions (37) are fixedly connected with buffer support plates (38).

4. The magnetic levitation crystallizer vibration device according to claim 2, characterized in that: A lower buffer column (39) is fixedly connected to the upper center of the base plate (31). A pneumatic chamber (310) is slidably sleeved on the upper end of the lower buffer column (39). A frame column (311) is symmetrically fixedly connected to the outer side of the pneumatic chamber (310). An air inlet (312) is opened at the center of one side wall of the pneumatic chamber (310), and a sealing plug is tightly fitted inside the air inlet (312). An upper buffer column (313) is slidably sleeved on the upper end of the pneumatic chamber (310), and a sealing ring (314) is fixedly sleeved on the lower end of the outer side of the upper buffer column (313).

5. The magnetic levitation crystallizer vibration device according to claim 4, characterized in that: Each of the two frame columns (311) is fixedly connected to a side frame (315) on the side away from each other, and a groove (316) is provided at the center of the two inner walls of the two side frames (315) that are away from each other.

6. The magnetic levitation crystallizer vibration device according to claim 1, characterized in that: The guide assembly (4) includes slide rails (41), which are fixedly connected to the upper end of the base (1). Each of the four slide rails (41) has a baffle (42) fixedly connected to its upper end. Each of the four slide rails (41) has a sliding column (43) slidably sleeved on its inner side, which is close to each other. The sliding column (43) is fixedly connected to the outer wall of the crystallizer body (5).

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