A device for changing a stopper rod of a tundish of a continuous casting machine

Abstract

The utility model discloses a plug rod dismounting and replacing device of continuous casting machine middle tank belongs to the molten steel smelting technical field, including mobile guide rail frame, and the mobile guide rail frame is slidably connected with the dismounting and replacing platform, is provided with the lifting mechanism on the dismounting and replacing platform, is provided with the installation platform on the lifting mechanism, is provided with the drive mechanism on the installation platform, and the drive mechanism transmission is connected with the butt joint screwing mechanism, and one side of mobile guide rail frame upper portion is provided with the heat preservation containing storehouse, compared with manual auxiliary screwing and the replacement operation, improves the replacement efficiency, and personnel is far away the high temperature molten steel area, guarantees the personnel safety, avoids the frequent manual handling and the alignment, and the replacement operation efficiency is improved greatly.

Description

Technical Field

[0001] This utility model belongs to the field of steel smelting technology, specifically a stopper rod replacement device for the intermediate tundish of a continuous casting machine. Background Technology

[0002] In continuous casting, the tundish serves as a crucial buffer between the ladle and the crystallizer, and its bottom typically features a stopper rod mechanism to regulate the flow rate and ensure precise pouring during continuous casting. Because the stopper rod is exposed to prolonged exposure to high-temperature molten steel, oxidation, and frequent opening and closing operations, its material and sealing connections are prone to damage, thermal fatigue cracking, corrosion, and wear. If the stopper rod seal fails or malfunctions, it can directly lead to uncontrolled pouring or flow interruption, and in severe cases, even premature scrapping of the tundish.

[0003] Chinese utility model patent publication number CN215879863U discloses a device for online replacement of tundish stopper rods. This device mainly includes: a lead screw, a cross lock nut, a first clamping pad, a second clamping pad, a connecting nut, a fastening nut, and a pressure cap. The lead screw passes through these components sequentially from top to bottom. The cross lock nut is fixedly connected to the first clamping pad, and the second clamping pad is fixedly connected to the connecting nut. They are connected to a trailing rod with hexagonal protrusions via a connecting screw. The pressure nut and pressure cap are used to fix and unlock the stopper rod. This device allows for online replacement of the stopper rod without interrupting the steel supply, avoiding frequent tundish replacements, effectively improving the controllability of the injection flow and the service life of the tundish, thereby increasing production efficiency and possessing high engineering application value.

[0004] However, this solution still has certain limitations. Although the locking operation is an improvement over the traditional manual method, it still requires manual operation of the lever to perform the locking action. That is, the personnel need to use the lock nut fastener to hook the lever on the cross lock nut and tighten it repeatedly to complete the disassembly and assembly process. Working near high-temperature molten steel not only poses certain safety risks, but also has limited efficiency due to repeated operations. Utility Model Content

[0005] The purpose of this utility model is to provide a stopper rod replacement device for the intermediate tundish of a continuous casting machine, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] A stopper rod replacement device for an intermediate tundish of a continuous casting machine is provided, comprising a movable guide rail frame, a replacement platform slidably connected to the movable guide rail frame, a lifting mechanism provided on the replacement platform, an installation platform provided on the lifting mechanism, a driving mechanism provided on the installation platform, a docking and tightening mechanism being drivenly connected to the driving mechanism, and a heat-insulating storage chamber provided on one side of the upper part of the movable guide rail frame.

[0007] Furthermore, the movable guide rail frame is provided with a transverse guide rail, the transverse guide rail is provided with an electric slider, and the electric slider is fixedly connected to a replacement platform. The electric slider is controlled to move on the transverse guide rail. The electric slider moves precisely to a preset position, driving the replacement platform fixed on it to move directly above the target stopper. Once the positioning is completed, the docking and tightening mechanism automatically docks with the threaded end of the stopper, and the stopper replacement process begins.

[0008] Furthermore, the lifting mechanism includes a hydraulic cylinder, which is mounted on the replacement platform. The telescopic end of the hydraulic cylinder is fixedly connected to the installation platform. Several guide rods are also provided between the installation platform and the replacement platform. The installation platform needs to move up and down with the extension and retraction of the hydraulic cylinder. The guide rods are installed on both sides of the replacement platform and are connected to the installation platform through guide sleeves or bearing sleeves, which play an auxiliary positioning and anti-eccentric load role, ensuring that the hydraulic cylinder moves smoothly during the lifting process without shaking or tilting.

[0009] Furthermore, the drive mechanism includes a servo motor, the output end of which is fixedly connected to a drive wheel. The drive wheel is connected to a driven wheel via a synchronous belt drive. The output end of the driven wheel is fixedly connected to a rotating shaft, which is rotatably connected to the mounting platform. A mating and tightening mechanism is fixedly connected to the rotating shaft. The extension and retraction of the hydraulic cylinder controls the lifting and lowering of the mounting platform. The mounting platform is lowered to a suitable height by the hydraulic system, aligning the mating and tightening mechanism with the threaded plug. After the servo motor starts, it drives the drive wheel to rotate via the output shaft. The drive wheel drives the synchronous belt drive, causing the driven wheel to rotate synchronously. The shaft end of the driven wheel is fixedly connected to the rotating shaft. The rotating shaft drives the mating and tightening mechanism installed at its lower end to tighten or loosen with the plug, thereby realizing the insertion or removal of the plug.

[0010] Furthermore, the docking and tightening mechanism includes a tightening pressure plate, which is fixedly connected to the bottom of the rotating shaft. A rotating docking plate is provided at the lower part of the tightening pressure plate. The rotating docking plate is provided with a threaded opening, which is used for threaded docking with the threaded connection end of the upper surface of the stopper rod. The servo motor rotates and drives the rotating shaft through a synchronous belt. The rotating shaft drives the tightening pressure plate to rotate, and the rotating docking plate below the tightening pressure plate rotates. The internal thread of the rotating docking plate meshes with the thread of the stopper rod, thereby tightening the stopper rod.

[0011] Furthermore, the rotating docking plate is detachably connected to the bottom of the tightening pressure plate, which facilitates the removal and replacement of rotating docking plates of different diameters to meet the replacement needs of different stoppers.

[0012] Furthermore, each of the tightening plates is provided with a high-temperature resistant anti-slip layer. The specific material of the high-temperature resistant anti-slip layer is a silicon carbide coating. The surface of the stopper rod may become smooth due to high-temperature oxidation or residual steel slag. The high-temperature resistant anti-slip layer prevents the stopper rod from slipping during docking and rotation through the high friction coefficient surface, ensuring that the stopper rod does not shift during disassembly and assembly.

[0013] Furthermore, the insulated receiving chamber is provided with a receiving groove and an insulation groove on both sides. The receiving groove is used to receive and temporarily store the damaged stopper rods that have been disassembled, and the insulation groove is used to preheat the new stopper rods that are to be installed, so as to prevent thermal shock or sealing failure caused by excessive temperature difference between the old and new stopper rods, thereby ensuring the smooth progress of the replacement process and the stable operation of the device.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] By setting up a replacement platform that can slide back and forth on a moving guide rail, the entire tightening and disassembly operation can be quickly moved to the target stopper position, avoiding frequent manual handling and alignment, and greatly improving the efficiency of the replacement operation.

[0016] By replacing the drive mechanism and the docking tightening mechanism on the platform, the automatic tightening or loosening operation of the threaded connection end of the stopper rod can be completed, which significantly improves the level of automation of the operation and reduces the intensity of manual labor.

[0017] The entire process of docking, tightening, replacement and handling is completed automatically by mechanical structure. Operators are far away from the high temperature area of ​​the intermediate ladle, which significantly reduces the safety risks of working in high temperature environment and improves operational safety. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 A schematic diagram of the overall structure of a stopper rod replacement device for an intermediate tundish of a continuous casting machine;

[0020] Figure 2 A schematic diagram of the drive mechanism structure provided by this utility model;

[0021] Figure 3 A schematic diagram of the docking and tightening mechanism provided by this utility model.

[0022] In the diagram: 1. Moving guide rail frame; 11. Transverse guide rail; 12. Electric slider; 2. Replacement platform; 3. Lifting mechanism; 31. Hydraulic cylinder; 32. Guide rod; 4. Installation platform; 5. Drive mechanism; 51. Servo motor; 52. Drive wheel; 53. Synchronous belt; 54. Driven wheel; 55. Rotating shaft; 6. Docking and tightening mechanism; 61. Tightening pressure plate; 611. High-temperature resistant anti-slip layer; 62. Rotating docking plate; 63. Threaded port; 7. Insulated storage chamber; 71. Storage groove; 72. Insulated groove. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] 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 only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-3 As shown in the present invention, a stopper rod replacement device for a continuous casting machine intermediate tank includes a movable guide rail frame 1, a replacement platform 2 slidably connected on the movable guide rail frame 1, a lifting mechanism 3 on the replacement platform 2, an installation platform 4 on the lifting mechanism 3, a driving mechanism 5 on the installation platform 4, a docking tightening mechanism 6 connected to the driving mechanism 5, and a heat preservation and receiving chamber 7 on one side of the upper part of the movable guide rail frame 1.

[0030] During the positioning phase, the electric slider 12 controls the entire replacement platform 2 to slide on the transverse guide rail 11 on the moving guide rail frame 1, moving the equipment directly above the target stopper rod. The lifting mechanism 3 is activated to adjust the height of the installation platform 4, aligning the rotating docking plate 62 at the bottom of the docking tightening mechanism 6 with the threaded end of the stopper rod. The drive mechanism 5 is activated to rotate the rotating shaft 55, causing the docking tightening mechanism 6 to tighten or loosen the stopper rod. After removing the old stopper rod, the lifting mechanism 3 lifts the old stopper rod and moves it into the heat preservation chamber 7 to complete the removal. The above operation is repeated to complete the installation of the new stopper rod. Compared with manual tightening and replacement operations, the replacement efficiency is improved, and personnel are kept away from the high-temperature molten steel area, ensuring personnel safety.

[0031] In one embodiment, see Figure 1 and Figure 2 As shown, a transverse guide rail 11 is provided on the moving guide rail frame 1, and an electric slider 12 is provided on the transverse guide rail 11. A replacement platform 2 is fixedly connected to the electric slider 12. The transverse guide rail 11 and the electric slider 12 are made of high-strength alloy steel or heat-treated stainless steel. When it is necessary to replace the stopper rod at a specified position, the control system controls the electric slider 12 to move on the transverse guide rail 11 according to the spatial distribution position of the stopper rod in the intermediate tank. The electric slider 12 moves precisely to the preset position, driving the replacement platform 2 (including lifting, tightening and other modules) fixed on it to move directly above the target stopper rod. Once the positioning is completed, the docking and tightening mechanism 6 automatically docks with the threaded end of the stopper rod, and the stopper rod replacement process begins.

[0032] In one embodiment, see Figure 1 and Figure 3As shown, the lifting mechanism 3 includes a hydraulic cylinder 31, which is mounted on the replacement platform 2. The extension and retraction end of the hydraulic cylinder 31 is fixedly connected to the installation platform 4. Guide rods 32 are also provided on both sides of the installation platform 4 and the replacement platform 2. The piston rod is pushed to extend and retract by the hydraulic system, so that the installation platform 4 can move in the vertical direction. The installation platform 4 is mounted on the top of the piston rod of the hydraulic cylinder 31 and is a key platform for installing and bearing the drive mechanism 5 and the docking and tightening mechanism 6. The installation platform 4 needs to move up and down with the extension and retraction of the hydraulic cylinder 31. The guide rods 32 are mounted on both sides of the replacement platform 2 and are connected to the installation platform 4 through guide sleeves or bearing sleeves. They play an auxiliary positioning and anti-eccentric load role, ensuring that the hydraulic cylinder 31 moves smoothly during the lifting and lowering process without shaking or tilting.

[0033] In one embodiment, see Figure 1 and Figure 3 As shown, the drive mechanism 5 includes a servo motor 51. The output end of the servo motor 51 is fixedly connected to a drive wheel 52. The drive wheel 52 is driven by a driven wheel 54 via a synchronous belt 53. The output end of the driven wheel 54 is fixedly connected to a rotating shaft 55. The rotating shaft 55 is rotatably connected to the mounting platform 4. A docking and tightening mechanism 6 is fixedly connected to the rotating shaft 55. A hydraulic cylinder 31 is set on the replacement platform 2 as the main drive element. The extension and retraction of the hydraulic cylinder 31 controls the lifting and lowering of the mounting platform 4. The mounting platform 4 is lowered to a suitable height by the hydraulic system, so that the docking and tightening mechanism 6 is aligned with the thread of the stopper rod. After the servo motor 51 is started, it drives the drive wheel 52 to rotate through the output shaft. The drive wheel 52 drives the synchronous belt 53 to rotate synchronously. The shaft end of the driven wheel 54 is fixedly connected to the rotating shaft 55. The rotating shaft 55 drives the docking and tightening mechanism 6 installed at its lower end to tighten or loosen with the stopper rod, realizing the insertion or removal of the stopper rod.

[0034] In one embodiment, see Figure 2 and Figure 3 As shown, the mating and tightening mechanism 6 includes a tightening pressure plate 61, which is fixedly connected to the bottom of the rotating shaft 55. A rotating mating plate 62 is provided at the lower part of the tightening pressure plate 61. The rotating mating plate 62 is provided with a threaded opening 63, which is used for threaded mating of the threaded connection end on the upper surface of the stopper rod. The servo motor 51 rotates and drives the rotating shaft 55 through the synchronous belt 53. The rotating shaft 55 drives the tightening pressure plate 61 to rotate, and the rotating mating plate 62 below the tightening pressure plate 61 rotates. The internal thread of the rotating mating plate 62 meshes with the thread of the stopper rod, thereby tightening the stopper rod.

[0035] In one embodiment, see Figure 2 and Figure 3 As shown, the rotating docking plate 62 is detachably connected to the bottom of the tightening pressure plate 61, which facilitates the removal and replacement of rotating docking plates 62 with different diameters to meet the replacement needs of different stoppers.

[0036] In one embodiment, see Figure 2 and Figure 3 As shown, each of the tightening plates 61 is provided with a high-temperature resistant anti-slip layer 611. The specific material of the high-temperature resistant anti-slip layer 611 is a silicon carbide (SiC) coating. The surface of the stopper rod may become smooth due to high-temperature oxidation or residual steel slag. The high-temperature resistant anti-slip layer 611 prevents the stopper rod from slipping during docking and rotation through a high friction coefficient surface, ensuring that the stopper rod does not shift during disassembly and assembly.

[0037] In one embodiment, see Figure 1 and Figure 2 As shown, the heat-insulating storage chamber 7 has a receiving groove 71 and a heat-insulating groove 72 on both sides inside. The receiving groove 71 is used to receive and temporarily store the damaged stopper rods that have been disassembled. The heat-insulating groove 72 is used to preheat the new stopper rods that are to be installed, so as to prevent thermal shock or sealing failure caused by excessive temperature difference between the old and new stopper rods, thereby ensuring the smooth progress of the replacement process and the stable operation of the device.

[0038] The receiving tank 71 is used to temporarily receive hot and damaged stoppers during replacement operations, preventing them from directly contacting the equipment body or operators, and ensuring operational safety.

[0039] An electric heating device (not shown in the figure) is installed in the heat preservation tank 72 to preheat the new stopper rod so that its temperature is close to the temperature inside the intermediate tundish.

[0040] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A stopper rod replacement device for an intermediate tundish of a continuous casting machine, comprising a movable guide rail frame (1), characterized in that, A replacement platform (2) is slidably connected to the movable guide rail frame (1). A lifting mechanism (3) is provided on the replacement platform (2). An installation platform (4) is provided on the lifting mechanism (3). A driving mechanism (5) is provided on the installation platform (4). The driving mechanism (5) is connected to a docking and tightening mechanism (6). A heat-insulating storage compartment (7) is provided on one side of the upper part of the movable guide rail frame (1).

2. The stopper rod replacement device for a continuous casting machine tundish according to claim 1, characterized in that, The movable guide rail frame (1) is provided with a transverse guide rail (11), and an electric slider (12) is provided on the transverse guide rail (11). A replacement platform (2) is fixedly connected to the electric slider (12).

3. The stopper rod replacement device for a continuous casting machine tundish according to claim 1, characterized in that, The lifting mechanism (3) includes a hydraulic cylinder (31), which is mounted on the replacement platform (2). The telescopic end of the hydraulic cylinder (31) is fixedly connected to the installation platform (4). Several guide rods (32) are also provided between the installation platform (4) and the replacement platform (2).

4. The stopper rod replacement device for a continuous casting machine tundish according to claim 1, characterized in that, The drive mechanism (5) includes a servo motor (51), the output end of which is fixedly connected to a drive wheel (52), the drive wheel (52) is driven by a driven wheel (54) via a synchronous belt (53), the output end of which is fixedly connected to a rotating shaft (55), the rotating shaft (55) is rotatably connected to the mounting platform (4), and a docking tightening mechanism (6) is fixedly connected to the rotating shaft (55).

5. A stopper rod replacement device for a continuous casting machine tundish according to claim 4, characterized in that, The docking tightening mechanism (6) includes a tightening pressure plate (61), which is fixedly connected to the bottom of the rotating shaft (55). A rotating docking plate (62) is provided at the lower part of the tightening pressure plate (61), and the rotating docking plate (62) is provided with a threaded opening (63). The threaded opening (63) is used for threaded docking of the threaded connection end of the upper surface of the plug rod.

6. The stopper rod replacement device for a continuous casting machine tundish according to claim 5, characterized in that, The rotating docking plate (62) is detachably connected to the underside of the tightening pressure plate (61).

7. A stopper rod replacement device for a continuous casting machine tundish according to claim 6, characterized in that, Each of the tightening plates (61) is provided with a high-temperature resistant anti-slip layer (611).

8. A stopper rod replacement device for a continuous casting machine tundish according to claim 6, characterized in that, The heat-insulating storage chamber (7) has a storage trough (71) and a heat-insulating trough (72) on its two sides.

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