A continuous casting tundish stopper baking anti-deformation device

Abstract

The utility model discloses a kind of deformation-preventing devices of baking stopper in continuous casting tundish, baking furnace is equipped with several for the vertical limiting of stopper Limiting piece, limiting piece includes at least three vertical setting limiting rods, several limiting rods are cooperated and form limiting cavity for accommodating stopper, and its vertical contact limiting, several limiting rods lower end are all rotated and penetrated to baking furnace lower part, baking furnace lower part is equipped with the driving mechanism for driving the synchronous same direction rotation of several limiting rods in limiting piece, and the synchronous rotation of stopper in limiting cavity is driven;The utility model is driven by vertical limiting and rotation to stopper, not only effectively prevent the deformation bending of stopper in baking process, and make stopper can be evenly heated in baking process, fundamentally eliminate the thermal stress deformation problem generated due to traditional static baking thermal field uneven.

Description

Technical Field

[0001] This utility model relates to the technical field of continuous casting equipment in iron and steel metallurgy, and in particular to a device for baking and preventing deformation of the stopper rod in a continuous casting tundish. Background Technology

[0002] The stopper rod in the tundish of continuous casting is a key functional component in the continuous casting process. Its function is to precisely control the flow of molten steel from the tundish to the crystallizer. The stability of its working state is directly related to the smooth operation of continuous casting and the quality of the billet. The stopper rod is usually made of refractory materials such as alumina and carbon, and must be fully baked and preheated before being put into use to completely remove the physical water and crystal water inside.

[0003] Currently, domestic steel mills generally adopt the method of baking the stopper rods online along with the tundish or using a dedicated stopper rod baking oven for offline baking. However, these baking methods still have the following shortcomings in actual operation:

[0004] 1. Currently, when the stopper rod is baked, the heat is transferred from a fixed side, resulting in a higher temperature on the side of the stopper rod closer to the burner and a lower temperature on the side farther from the burner. Uneven heating of the stopper rod will lead to a huge difference in thermal expansion, thereby creating thermal stress, which will cause the stopper rod to bend or deform irreversibly.

[0005] 2. When the existing stopper rods are baked, the stopper rods are stationary and fixed, which means that the moisture inside the stopper rods (especially the moisture on the side away from the burner) cannot be completely removed, thus affecting the production and processing quality of the stopper rods.

[0006] 3. When baking existing stopper rods, they often need to be baked together with the intermediate cake, cross arm or connecting parts. This not only results in a large structural volume of the baking equipment, but also increases gas consumption during the baking heating process.

[0007] Therefore, there is an urgent need for a device to bake and prevent deformation of the stopper rod in a continuous casting tundish that can overcome the above-mentioned shortcomings. Utility Model Content

[0008] To overcome the shortcomings of the prior art, this utility model discloses a continuous casting tundish stopper rod baking anti-deformation device. This utility model, through vertical limiting and rotational driving of the stopper rod, not only effectively prevents the stopper rod from deforming and bending during the baking process, but also enables the stopper rod to be heated evenly during the baking process, fundamentally eliminating the problem of thermal stress deformation caused by the uneven thermal field of traditional static baking, and greatly improving the geometric accuracy and reliability of the stopper rod.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A device for preventing deformation during baking of stopper rods in continuous casting tundishes includes a baking furnace for baking the stopper rods, and further includes:

[0011] Several limiting components are installed inside the baking oven to vertically limit the stopper rod;

[0012] The limiting component includes at least three vertically arranged limiting rods. The limiting rods cooperate to form a limiting cavity for accommodating the stopper rod and for vertically abutting and limiting it. The lower ends of the limiting rods all rotate through to the lower part of the baking oven.

[0013] The drive mechanism is located at the bottom of the baking oven and is connected to the lower ends of several limiting rods that extend out of the bottom of the baking oven. It is used to drive several limiting rods in the limiting component to rotate synchronously in the same direction, so as to drive the stopper rod in the limiting cavity to rotate synchronously.

[0014] Several openings are located on the upper surface of the baking oven and are connected to several limiting cavities one by one for loading and unloading stopper rods;

[0015] A sealing cap, which can be detachably installed inside the opening, is used to seal the opening.

[0016] Furthermore, the drive mechanism includes:

[0017] The motor is located at the bottom of the baking oven, and its output end is equipped with a drive gear.

[0018] The driven gear is located at the end of the limiting rod that extends to the lower part of the baking oven;

[0019] A synchronous belt is fitted onto the drive gear and several driven gears to achieve synchronous and unidirectional meshing transmission between the drive gear and several driven gears.

[0020] Furthermore, the upper end of the limiting rod is rotatably connected to the top of the baking oven cavity.

[0021] Furthermore, the upper surface of the baking oven is provided with an opening, and an end cover adapted to the opening is detachably installed on the upper part of the baking oven. The opening is located on the upper surface of the end cover, and the upper end of the limiting rod is rotatably connected to the lower surface of the end cover.

[0022] Furthermore, the limiting rod includes a metal mandrel and a refractory material layer sleeved on the outside of the metal mandrel.

[0023] Furthermore, the refractory material layer is made of ceramic fiber or graphite.

[0024] Furthermore, the inner wall of the baking oven is provided with several gas burners for baking the stopper rod, as well as combustion channels that cooperate with the gas burners to form a swirling flow inside the baking oven.

[0025] Furthermore, the baking oven has an openable oven door on one side.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] By setting a limiting component consisting of at least three limiting rods, the stopper rod can be vertically clamped and limited, thus constraining the stopper rod from a physical structure perspective and effectively preventing the stopper rod from bending and deforming.

[0028] By setting a driving mechanism, the limit rod can be driven to rotate synchronously and in the same direction, thereby driving the stopper rod to rotate at a uniform speed during the baking process, so that it is heated evenly in 360°. This completely eliminates the problem of uneven heating and thermal stress concentration caused by uneven heat field in traditional static baking, eliminates the hidden danger of deformation from the root, ensures the geometric accuracy of the stopper rod, and lays a solid foundation for the control of casting and the stability of steel flow.

[0029] The operation of hoisting the stopper rod through the opening and sealing it with a sealing cap greatly simplifies the process. After the stopper rod is hoisted in, it can be baked in a sealed environment. After baking, it can be quickly removed, which greatly reduces the time of opening the furnace door and the loss of heat inside the furnace. This helps to maintain a stable furnace temperature and provides strong support for continuous production.

[0030] By using a limiting rod with a metal core wrapped with a soft refractory material layer (such as ceramic fiber or graphite), the required strength for transmission is ensured, hard scratches on the surface of the stopper rod are avoided, and thermal expansion is compensated to prevent jamming.

[0031] By setting end caps and oven doors, the inspection and maintenance of the limiting components and baking oven are greatly facilitated, improving the maintainability and service life of the equipment.

[0032] This invention, through vertical limiting and rotational drive of the stopper rod, not only effectively prevents deformation and bending of the stopper rod during the baking process, but also ensures that the stopper rod is heated evenly during baking. This fundamentally eliminates the problem of thermal stress deformation caused by uneven heat field in traditional static baking, greatly improving the geometric accuracy and reliability of the stopper rod. This invention also significantly improves thermal energy utilization efficiency, greatly reduces energy consumption, extends equipment life, and enhances operational safety and economy, providing a strong guarantee for the smooth operation of continuous casting production and the improvement of billet quality. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 This is a schematic diagram of the limiting component and driving mechanism of this utility model;

[0035] Figure 3 This is a schematic diagram of the baking oven structure of this utility model.

[0036] In the diagram: 1. Baking oven; 1.1. Opening; 1.2. Sealing cover; 1.3. Gas burner; 1.4. Opening; 1.5. Combustion channel; 2. Limiting component; 2.1. Limiting rod; 2.1.1. Metal mandrel; 2.1.2. Refractory material layer; 3. Limiting cavity; 4. Drive mechanism; 4.1. Motor; 4.2. Synchronous belt; 4.3. Drive gear; 4.4. Driven gear; 5. End cover. Detailed Implementation

[0037] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0038] Please refer to the instruction manual appendix. Figure 1-3 This utility model provides a technical solution:

[0039] Example 1: A device for preventing deformation during baking of a stopper rod in a continuous casting tundish includes a baking furnace 1 for baking the stopper rod. The inner wall of the baking furnace 1 is provided with several gas burners 1.3 for baking the stopper rod, and combustion channels 1.5 that cooperate with the gas burners 1.3. The gas burners 1.3 do not spray directly onto the stopper rod, but rather spray into the combustion channels 1.5, causing the high-temperature flame and flue gas to form a strong and uniform swirling flow within the baking furnace 1. This uniformly heats the stopper rod through convection and radiation, preventing localized overheating. The baking furnace 1 is provided with several limiting members 2 for vertically limiting the stopper rod. Specifically, each limiting member 2 includes at least three vertically arranged limiting rods 2.1. The limiting rods 2.1 cooperate to form a limiting cavity 3 for accommodating the stopper rod and vertically abutting and limiting it.

[0040] Several limiting rods 2.1 have their lower ends rotatably extending through to the lower part of the baking oven 1. To ensure a dynamic seal between the limiting rods 2.1 and the baking oven 1, bearing seats are fitted onto the limiting rods 2.1 extending through the baking oven 1. A sealing assembly is provided between the limiting rods 2.1 and the bearing seats, including at least one non-contact labyrinth seal. A water-cooling jacket is also fitted outside the bearing seats, and the water-cooling jacket has circulating cooling water channels inside, which can reduce the temperature to the temperature range that the sealing assembly can withstand. To ensure the vertical stability of the limiting rods 2.1, the upper end of the limiting rods 2.1 is rotatably connected to the top of the inner cavity of the baking oven 1. The lower part of the baking oven 1 is provided with a drive limit... The drive mechanism 4 is a mechanism that enables the synchronous rotation of several limiting rods 2.1 within the positioning component 2 and drives the stopper rod within the limiting cavity 3 to rotate synchronously. Specifically, the drive mechanism 4 includes a motor 4.1 located at the lower part of the baking oven 1. The output end of the motor 4.1 is provided with a drive gear 4.3, and the ends of the limiting rods 2.1 extending to the lower part of the baking oven 1 are each provided with a driven gear 4.4. The drive gear 4.3 and several driven gears 4.4 are arranged in parallel and on the same plane. A synchronous belt 4.2 is fitted on the drive gear 4.3 and several driven gears 4.4 to realize the synchronous and unidirectional meshing transmission between the drive gear 4.3 and several driven gears 4.4.

[0041] To facilitate the loading and unloading of the plug rod inside the limiting cavity 3, the upper surface of the baking oven 1 is provided with several openings 1.1 that correspond one-to-one with the limiting cavity 3. Each opening 1.1 is provided with a sealing cover 1.2. The sealing cover 1.2 and the opening 1.1 can be sealed together by threaded connection or interference fit.

[0042] During the heating of the stopper rod, workers use an overhead crane to vertically hoist the stopper rod to the upper part of the heating oven 1. The stopper rod is then vertically placed into the limiting cavity 3 through the inlet 1.1. Several limiting rods 2.1 within the limiting component 2 abut against the stopper rod. After the sealing cover 1.2 is closed, gas is introduced, causing the gas burner 1.3 to spray a high-temperature flame towards the gas passage 1.5. This creates a strong and uniform swirling flow of high-temperature flame and flue gas within the heating oven 1, uniformly heating the stopper rod through convection and radiation. During the heating process, the limiting component 2 not only vertically limits the stopper rod, effectively preventing deformation, but also drives the motor... Structure 4 can also drive several limiting rods 2.1 inside the limiting component 2 to rotate synchronously in the same direction, thereby causing the stopper rod to rotate as well. This ensures that each surface of the stopper rod can receive heat radiation equally, eliminating the temperature difference between the "sunny side" and the "shaded side" during static baking, resulting in less overall thermal stress and more consistent moisture discharge. After the stopper rod is baked, the sealing cover 1.2 can be opened, and the stopper rod can be lifted out by simply connecting the lifting device to the lifting hole at the top of the stopper rod through the port 1.1. This effectively reduces excessive heat loss in the baking oven 1, saves energy, and provides strong support for the efficient baking of the stopper rod in the future.

[0043] In Example 2, during the rotational driving of the stopper rod by the several limiting rods 2.1 within the limiting member 2, the limiting rods 2.1 directly contact and rub against the refractory material surface of the stopper rod. The refractory material surface is relatively fragile and may cause scratches or wear to the surface of the stopper rod. Therefore, the limiting rod 2.1 includes a metal mandrel 2.1.1 and a refractory material layer 2.1.2 sleeved on the outside of the metal mandrel 2.1.1. The refractory material layer 2.1.2 is made of soft ceramic fiber or graphite material, which not only protects the surface of the stopper rod, but also effectively prevents the limiting rods 2.1 and the stopper rod from colliding and jamming due to thermal expansion during the baking process.

[0044] In embodiment three, to facilitate the inspection and maintenance of the limiting component 2 by the staff, the upper surface of the baking oven 1 is provided with an opening 1.4, and the upper part of the baking oven 1 is provided with an end cover 5 that matches the opening. The end cover 5 can be detachably connected to the baking oven 1 by bolt fixing. The opening 1.1 is provided on the upper surface of the end cover 5, and the upper end of the limiting rod 2.1 is rotatably connected to the lower surface of the end cover 5. The detachable end cover 5 facilitates the subsequent disassembly, inspection and maintenance of the limiting rod 2.1. In order to facilitate the daily cleaning and maintenance of the interior of the baking oven 1 by the staff, an openable oven door is provided on one side of the baking oven 1.

[0045] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A device for preventing deformation during baking of stopper rods in continuous casting tundishes, comprising a baking furnace (1) for baking the stopper rods, characterized in that, Also includes: Several limiting components (2) are provided inside the baking oven (1) to vertically limit the stopper rod; Among them, the limiting member (2) includes at least three vertically arranged limiting rods (2.1), and the limiting rods (2.1) cooperate to form a limiting cavity (3) for accommodating the stopper rod and vertically abutting and limiting it. The lower ends of the limiting rods (2.1) all rotate through to the lower part of the baking oven (1). The drive mechanism (4) is located at the lower part of the baking oven (1) and is connected to the lower end of several limiting rods (2.1) that pass through the lower part of the baking oven (1). It is used to drive several limiting rods (2.1) in the limiting member (2) to rotate synchronously in the same direction, so as to drive the stopper rod in the limiting cavity (3) to rotate synchronously. Several ports (1.1) are provided on the upper surface of the baking oven (1) and are connected to several limiting cavities (3) in a one-to-one manner for loading and unloading stoppers; A sealing cap (1.2) is detachably installed inside the opening (1.1) to seal the opening (1.1).

2. The device for baking and preventing deformation of the stopper rod in a continuous casting tundish according to claim 1, characterized in that: The drive mechanism (4) includes: The motor (4.1) is located at the bottom of the baking oven (1), and its output end is equipped with a drive gear (4.3). Driven gear (4.4) is located at the end of limit rod (2.1) extending to the lower part of baking oven (1); A synchronous belt (4.2) is fitted onto the drive gear (4.3) and several driven gears (4.4) to achieve synchronous and unidirectional meshing transmission between the drive gear (4.3) and several driven gears (4.4).

3. The device for baking and preventing deformation of the stopper rod in a continuous casting tundish according to claim 1, characterized in that: The upper end of the limiting rod (2.1) is rotatably connected to the top of the inner cavity of the baking oven (1).

4. The device for baking and preventing deformation of the stopper rod in a continuous casting tundish according to claim 3, characterized in that: The baking oven (1) has an opening (1.4) on its upper surface. The baking oven (1) is detachably equipped with an end cover (5) that matches the opening. The opening (1.1) is located on the upper surface of the end cover (5). The upper end of the limiting rod (2.1) is rotatably connected to the lower surface of the end cover (5).

5. The device for baking and preventing deformation of the stopper rod in a continuous casting tundish according to claim 4, characterized in that: The limiting rod (2.1) includes a metal mandrel (2.1.1), and a sleeve fitted onto the metal mandrel ( 2.1.1) External refractory material layer (2.1.2).

6. The device for baking and preventing deformation of the stopper rod in a continuous casting tundish according to claim 5, characterized in that: The refractory material layer (2.1.2) is made of ceramic fiber or graphite.

7. The device for baking and preventing deformation of the stopper rod in a continuous casting tundish according to claim 1, characterized in that: The inner wall of the baking oven (1) is provided with several gas burners (1.3) for baking the stopper rod, and a combustion channel (1.5) that works in conjunction with the gas burners (1.3) to form a swirling flow in the baking oven (1).

8. The device for baking and preventing deformation of the stopper rod in a continuous casting tundish according to claim 1, characterized in that: The baking oven (1) has an openable oven door on one side.

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