Induction heating device for temperature compensation of ultra-thin plate strip

Abstract

The utility model discloses an induction heating device for ultra-thin strip temperature compensation, which comprises a frame and two mounting plates, the mounting plates are slidably connected to the frame, hydraulic cylinders are fixedly connected to two sides of the frame, and movable shafts of the hydraulic cylinders are fixedly connected with the mounting plates on the same sides to control the mounting plates to move along the horizontal direction; a worm and gear lifting machine and a servo motor are arranged on the mounting plate, and a movable shaft of the servo motor is in transmission connection with a worm of the worm and gear lifting machine so as to control a lifting lead screw of the worm and gear lifting machine to move in the vertical direction; and a lifting screw rod of the worm and gear lifting machine is fixedly connected with a sensor. The inductor is arranged on the frame in a sliding mode, the inductor can accurately move in the horizontal direction and the vertical direction, the low-temperature area of the plate strip is preheated, the low-temperature area formed after the plate strip is subjected to laminar cooling is preheated in advance, and it is guaranteed that the overall temperature uniformity of the surface of the plate strip is good after the plate strip passes through a laminar system.

Description

Technical Field

[0001] This utility model relates to the field of plate and strip induction heating technology, specifically to an induction heating device for heat compensation of ultra-thin plates and strips. Background Technology

[0002] Thin strip continuous casting is a near-net-shape continuous steel casting technology that solves the problems of high energy consumption, complex processes, long production cycles, and difficulties in switching production in traditional thin steel processing technologies. It offers advantages such as shorter process flow, fewer steps, lower energy consumption, lower emissions, and environmental friendliness. The process principle of thin strip continuous casting involves directly injecting molten steel between a pair of opposing rotating casting rolls. The molten steel passes through the rolls and is directly cast into a strip with a thickness of less than 2.5 mm. The thin strip is then fed to a rolling mill via guide rolls and pinch rolls, rolled to the target thickness, cooled to the target temperature by a laminar flow cooling system, and then coiled into coils. Because the production speed of thin strip continuous casting can reach 1-2 m / s, and the strip has a certain degree of unevenness, the spray water from the laminar flow cooling system accumulates on the strip, forming low-temperature zones. This results in a maximum temperature difference of 50–200°C on the strip surface. Furthermore, different spray water configurations (i.e., different spray head spacing and flow rates) also cause different low-temperature zones to appear along the drawing direction for strips of different specifications, and the size and location of these low-temperature zones also vary randomly. The large temperature difference on the surface of the strip caused by the laminar flow cooling system leads to a series of problems, such as uneven grain refinement in the transverse direction, which seriously affects the quality of the strip, especially the ultrathin strip.

[0003] Since the surface temperature difference in strip continuous casting is mainly caused by uneven cooling of the laminar flow system, the current improvement methods are mainly to control the water spraying method and flow rate of the laminar flow system. However, it is still difficult to control the surface temperature difference of the strip well. There is currently no effective solution for the high and low temperature zone in the short casting and rolling process that is currently widespread.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an induction heating device for heat compensation of ultra-thin strips. This induction heating device can be installed above the strip and at the front end of the laminar flow cooling system. It can accurately control the inductor to preheat the strip in the low-temperature region after the laminar flow system has cooled, so as to ensure that the surface temperature of the strip is basically uniform after the laminar flow system has cooled it.

[0006] To achieve the above objectives, this utility model provides an induction heating device for heat compensation of ultra-thin plates, comprising a frame and two mounting plates. The mounting plates are slidably connected to the frame, and hydraulic cylinders are fixedly connected to both sides of the frame. The movable shafts of the hydraulic cylinders are fixedly connected to the mounting plates on the same side to control the horizontal movement of the mounting plates. A worm gear jack and a servo motor are provided on the mounting plates. The movable shaft of the servo motor is connected to the worm gear drive of the worm gear jack to control the vertical movement of the lifting screw of the worm gear jack. An inductor is fixedly connected to the lifting screw of the worm gear jack.

[0007] Furthermore, the frame includes support rods and crossbeams, with the support rods fixedly connected to both ends of the crossbeams.

[0008] Furthermore, a guide rail is fixedly connected to the crossbeam, and a slider is fixedly connected to the lower part of the mounting plate, with the slider slidably connected to the guide rail.

[0009] Furthermore, a mounting base is fixedly connected to the mounting plate, the worm gear jack is mounted on the mounting base, and the servo motor is fixedly connected to the mounting plate.

[0010] Furthermore, the lifting screw of the worm gear jack is fixedly connected to the sensor connector, and the sensor is fixedly connected to the lower end of the sensor connector.

[0011] Furthermore, the first end of the hydraulic cylinder connecting seat is fixedly connected to both ends of the crossbeam, and the second end of the hydraulic cylinder connecting seat is fixedly connected to the hydraulic cylinder.

[0012] Furthermore, a hydraulic cylinder displacement sensor is installed on the hydraulic cylinder.

[0013] Furthermore, the movable shaft of the servo motor is fixedly connected to the first end of the coupling, and the second end of the coupling is fixedly connected to the worm of the worm gear jack.

[0014] The above-mentioned solution of this utility model has the following beneficial effects:

[0015] The induction heating device for ultra-thin strip heat compensation provided by this utility model uses a sensor that slides on a frame. The sensor can move precisely in both horizontal and vertical directions to adjust its position in real time and preheat the low-temperature area of ​​the strip. By preheating the low-temperature area formed after the strip has cooled in laminar flow, the device ensures better overall surface temperature uniformity of the strip after passing through the laminar flow system, resulting in a significant improvement in strip quality. At the same time, the induction heating device can be directly installed above the strip and uses unilateral heating, requiring minimal modification to the existing strip continuous casting production line structure. It is also highly flexible in movement and adjustment, facilitating the modification of existing production lines.

[0016] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] Figure 1 This is a perspective view of the overall structure of this utility model;

[0018] Figure 2 This is a top view of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram illustrating the application of the induction heating device of this utility model.

[0020] [Explanation of Labels in the Attached Image]

[0021] 1-Frame; 101-Support rod; 102-Crossbeam; 2-Hydraulic cylinder connecting seat; 3-Hydraulic cylinder; 4-Servo motor; 5-Coupling; 6-Worm gear jack; 7-Mounting seat; 8-Mounting plate; 9-Slider; 10-Guide rail; 11-Sensor connecting seat; 12-Sensor; 13-Strip; 131-Low temperature zone; 132-High temperature zone; 14-Temperature measuring instrument. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. The various specific technical features and embodiments described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features / embodiments can form different implementation methods. To avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments in this utility model will not be described separately.

[0023] It should be noted that the terms "set" and "connect" should be interpreted broadly. For example, it can refer to direct setting, installation, or connection, or indirect setting or connection through central components or structural parts. Furthermore, the orientations or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" in this utility model are based on the orientations or positional relationships shown in the accompanying drawings or the conventional placement or usage state. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the referred structural parts, features, devices, or elements must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this utility model.

[0024] like Figures 1-3As shown, this utility model provides an induction heating device for heat compensation of ultra-thin strip steel, including a frame 1 and two mounting plates 8. The frame 1 includes support rods 101 and a crossbeam 102. The two support rods 101 are respectively fixedly connected to both ends of the crossbeam 102 to form a "door"-shaped frame 1, which can be directly erected above the strip steel 13 of the thin-plate continuous casting production line for convenience and flexibility. The mounting plates 8 are all slidably connected to the frame 1. Specifically, guide rails 10 are fixedly connected to both sides of the crossbeam 102, and sliders 9 are correspondingly fixedly connected to the lower sides of the mounting plates 8. The sliders 9 are slidably connected to the guide rails 10 on both sides, thereby realizing the horizontal sliding of the mounting plates 8 on the frame 1. Specifically, in this embodiment, four sliders 9 are provided, two on each side.

[0025] A hydraulic cylinder 3 is fixedly connected to both sides of the frame 1. The movable shaft of the hydraulic cylinder 3 is fixedly connected to the mounting plate 8 on the same side. The horizontal movement of the guide rail 10 of the mounting plate 8 is controlled by the extension and retraction movement of the hydraulic cylinder 3. Preferably, the first end of the hydraulic cylinder connecting seat 2 is fixedly connected to both ends of the crossbeam 102, and the hydraulic cylinder 3 is fixedly connected to the second end of the hydraulic cylinder connecting seat 2, thereby fixing the hydraulic cylinder 3 on the frame 1. A hydraulic cylinder displacement sensor is provided on the hydraulic cylinder 3. The hydraulic cylinder displacement sensor can be either built-in or external, as long as it can accurately detect and provide feedback on the hydraulic stroke of the hydraulic cylinder 3. Furthermore, the mounting plate 8 is equipped with a worm gear jack 6 and a servo motor 4. The movable shaft of the servo motor 4 is fixedly connected to the first end of the coupling 5, and the second end of the coupling 5 is fixedly connected to the worm of the worm gear jack 6. The worm of the worm gear jack 6 and the coupling 4 are connected through the coupling 5. The lifting screw of the worm gear jack 6 is fixedly connected to the sensor 12. The servo motor 4 drives the lifting screw of the worm gear jack 6 to move in the vertical direction, thereby controlling the height of the sensor 12 from the belt 13.

[0026] In this embodiment, a mounting base 7 is fixedly connected to the mounting plate 8, and a worm gear jack 6 is mounted on the mounting base 6. The lifting screw of the worm gear jack 6 passes through the mounting base 7 and the mounting plate 8 respectively and is located below the crossbeam 102. The lifting screw of the worm gear jack 6 is fixedly connected to a sensor connecting seat 11, and a sensor 12 is fixedly connected to the lower end of the sensor connecting seat 11, thereby achieving fixed installation of the sensor 12. At the same time, a servo motor 4 is fixedly connected to the mounting plate 8.

[0027] During the continuous casting process of thin strip, the inherent unevenness of the strip causes the spray water from the laminar flow cooling system to accumulate on the strip, forming a low-temperature zone 131 in the strip 13. Furthermore, different spray water configurations (i.e., different spray head spacing and flow rates) can also result in different low-temperature zones 131 along the casting direction for strips of different specifications. For details, please refer to [link to relevant documentation]. Figure 3 As shown. Figure 3 The dashed line indicates that the strip 13 becomes a low-temperature zone 131 after being cooled by the laminar flow system. Correspondingly, the low-temperature zone 131 is flanked by high-temperature zones 132. The low-temperature zones 131 on the strip 13 are distributed in a strip-like pattern along the longitudinal direction. In actual production, the temperature of the strip 13 is relatively uniform before passing through the laminar flow cooling system. However, after being cooled by the laminar flow system, low-temperature zones 131 appear along the drawing direction. At this time, the induction heating device provided by this utility model is arranged at the front end of the laminar flow cooling system. A temperature measuring instrument 14 is set above the strip 13 after the laminar flow cooling system. The temperature measuring instrument 14 can measure the temperature distribution of the strip 13 after being cooled by the laminar flow system in real time. The temperature distribution is fed back to the induction heating device at the front end. The induction heating device first pushes the sensor 12 under the mounting plate 8 horizontally to directly above any low-temperature zone 131 through the hydraulic cylinder 3. The hydraulic cylinder displacement sensor in the hydraulic cylinder 3 can provide real-time feedback on the position of the sensor 12. Then, the servo motor 4 is started, and the worm gear lift 6 drives the sensor 12 to a working position 10-50mm away from the upper surface of the strip 13. The sensor 12 then initiates induction heating of the low-temperature zone 131 of the strip 13, achieving pre-heating. After pre-heating, the temperature of the low-temperature zone 131 will rise, and after passing through the laminar flow cooling system, the surface temperature of the strip 13 will be basically uniform. Each induction heating device can pre-heat two low-temperature zones 131. If there are many low-temperature zones, multiple sets of induction heating devices can be set up to pre-heat them separately.

[0028] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An induction heating device for heat compensation of ultra-thin plates and strips, characterized in that, The device includes a frame (1) and two mounting plates (8). The mounting plates (8) are slidably connected to the frame (1). Hydraulic cylinders (3) are fixedly connected to both sides of the frame (1). The movable shaft of the hydraulic cylinder (3) is fixedly connected to the mounting plate (8) on the same side to control the mounting plate (8) to move in the horizontal direction. A worm gear jack (6) and a servo motor (4) are provided on the mounting plate (8). The movable shaft of the servo motor (4) is connected to the worm gear drive of the worm gear jack (6) to control the lifting screw of the worm gear jack (6) to move in the vertical direction. A sensor (12) is fixedly connected to the lifting screw of the worm gear jack (6).

2. The induction heating device for heat compensation of ultra-thin plates and strips according to claim 1, characterized in that, The frame (1) includes a support rod (101) and a crossbeam (102), with the support rod (101) fixedly connected to both ends of the crossbeam (102).

3. The induction heating device for heat compensation of ultra-thin plates and strips according to claim 2, characterized in that, The guide rail (10) is fixedly connected to the crossbeam (102), and the slider (9) is fixedly connected to the bottom of the mounting plate (8). The slider (9) is slidably connected to the guide rail (10).

4. The induction heating device for heat compensation of ultra-thin plates and strips according to claim 1, characterized in that, The mounting plate (8) is fixedly connected to the mounting base (7), the worm gear jack (6) is mounted on the mounting base (7), and the servo motor (4) is fixedly connected to the mounting plate (8).

5. The induction heating device for heat compensation of ultra-thin plates and strips according to claim 1, characterized in that, The lifting screw of the worm gear jack (6) is fixedly connected to the sensor connector (11), and the sensor (12) is fixedly connected to the lower end of the sensor connector (11).

6. The induction heating device for heat compensation of ultra-thin plates and strips according to claim 2, characterized in that, The first end of the hydraulic cylinder connecting seat (2) is fixedly connected to both ends of the crossbeam (102), and the second end of the hydraulic cylinder connecting seat (2) is fixedly connected to the hydraulic cylinder (3).

7. The induction heating device for heat compensation of ultra-thin plates and strips according to claim 1, characterized in that, A hydraulic cylinder displacement sensor is installed on the hydraulic cylinder (3).

8. The induction heating device for heat compensation of ultra-thin plates and strips according to claim 1, characterized in that, The movable shaft of the servo motor (4) is fixedly connected to the first end of the coupling (5), and the second end of the coupling (5) is fixedly connected to the worm of the worm gear jack (6).

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