Anti-blocking rod for continuous casting

Abstract

The utility model discloses an anti-blocking rod for continuous casting, which comprises a stopper rod body (1) and a stopper rod head (2), and is characterized in that a variable-diameter transition area (3) of which the diameter is suddenly reduced is arranged between the stopper rod body (1) and the stopper rod head (2), and the maximum diameter of the stopper rod head (2) can be reduced to 88%-92% of the diameter of the stopper rod body (1) by the variable-diameter transition area (3). According to the stopper rod, the obvious reducing transition area of which the diameter is suddenly reduced is arranged between the stopper rod body and the stopper rod head, so that the inflow angle of molten steel can be locally changed, and non-metallic inclusions in the molten steel can be effectively prevented from being deposited on the stopper rod head, so that the anti-blocking effect is achieved, the continuous casting flow control is improved, and the service life of the stopper rod is prolonged. Irregular oscillation or rod punching caused by inclusion deposition of the stopper rod is reduced, and finally the quality of a continuous casting steel billet is improved.

Description

Technical Field

[0001] This utility model relates to the field of continuous casting technology, specifically an anti-clogging rod for continuous casting. Background Technology

[0002] In the field of continuous casting technology, stopper rods are often used as key flow-controlling refractory materials. Stopper rods are important components for controlling the flow rate of molten steel from the tundish to the crystallizer and the liquid level height in the crystallizer. (Appendix) Figure 1 This is a schematic diagram of the structure of an anti-clogging rod for continuous casting in the prior art, including a rod body 1 and a rod head 2. The upper edge of the rod head 2 automatically connects to the lower edge of the rod body 1, so that the maximum diameter of the rod head 2 is equal to the diameter of the rod body 1. During the casting process, slag particles and non-metallic inclusions such as refractory material spallings in the molten steel often accumulate and clog near the rod head, and are then suddenly flushed into the crystallizer, causing violent fluctuations in the liquid level in the crystallizer and affecting the quality of the steel billet. Utility Model Content

[0003] The purpose of this invention is to address the problems existing in the prior art by providing an anti-clogging rod for continuous casting that can locally change the angle of molten steel inflow.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A plugging rod for continuous casting includes a plug rod body and a plug rod head, characterized in that: a diameter transition zone with a sudden decrease in diameter is provided between the plug rod body and the plug rod head, which can reduce the maximum diameter of the plug rod head to 88% to 92% of the diameter of the plug rod body.

[0006] The maximum diameter of the variable diameter transition zone is equal to the diameter of the stopper rod body, and the minimum diameter of the variable diameter transition zone is equal to the maximum diameter of the stopper rod head.

[0007] The height of the variable diameter transition zone is 20mm to 50mm.

[0008] The inclination angle of the variable diameter transition zone when it contracts inward is not less than 55°.

[0009] The inclination angle of the variable diameter transition zone as it contracts inward is 60° to 70°.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] This invention provides a significant diameter transition zone with a sudden decrease in diameter between the stopper rod body and the stopper rod head. This zone can locally change the inflow angle of molten steel, effectively preventing the deposition of non-metallic inclusions in the molten steel on the stopper rod head. This prevents blockage, improves continuous casting flow control, reduces irregular oscillations or impacts caused by inclusion deposition in the stopper rod, and ultimately improves the quality of continuously cast steel billets. Attached Figure Description

[0012] Appendix Figure 1 A schematic diagram of the structure of an anti-clogging rod for continuous casting in the prior art;

[0013] Appendix Figure 2 A schematic diagram of the structure of the anti-blocking rod for continuous casting provided by this utility model.

[0014] Wherein: 1—stopper rod body; 2—stopper rod head; 3—variable diameter transition zone. Detailed Implementation

[0015] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0016] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0017] like Figure 2 As shown: A plugging rod for continuous casting includes a plug rod body 1 and a plug rod head 2. A diameter-changing transition zone 3 with a sudden decrease in diameter is provided between the plug rod body 1 and the plug rod head 2. The maximum diameter of the diameter-changing transition zone 3 is equal to the diameter of the plug rod body 1, and the minimum diameter of the diameter-changing transition zone 3 is equal to the maximum diameter of the plug rod head 2. The diameter-changing transition zone 3 can reduce the maximum diameter of the plug rod head 2 to 88% to 92% of the diameter of the plug rod body 1.

[0018] Since the diameter of the sudden reduction in the diameter of the transition zone 3 must be able to pass through non-metallic inclusions such as slag particles and refractory material spalling parts in the molten steel, the height of the transition zone 3 is 20mm to 50mm, and the inclination angle of the transition zone 3 when it shrinks inward is not less than 55°, and preferably 60° to 70°.

[0019] This invention provides a significant diameter transition zone 3 with a sudden decrease in diameter between the stopper rod body 1 and the stopper rod head 2. This zone can locally change the inflow angle of molten steel, effectively preventing the deposition of non-metallic inclusions in the molten steel on the stopper rod head 2. This prevents blockage, improves continuous casting flow control, reduces irregular oscillations or impacts caused by inclusion deposition in the stopper rod, and ultimately improves the quality of continuously cast steel billets.

[0020] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0021] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0022] In this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model. Technologies not covered by this utility model can be implemented by existing technologies.

Claims

1. A plugging rod for continuous casting, comprising a plug rod body (1) and a plug rod head (2), characterized in that: A diameter transition zone (3) with a sudden decrease in diameter is provided between the stopper rod body (1) and the stopper rod head (2). This diameter transition zone (3) can reduce the maximum diameter of the stopper rod head (2) to 88% to 92% of the diameter of the stopper rod body (1).

2. The anti-clogging rod for continuous casting according to claim 1, characterized in that: The maximum diameter of the variable diameter transition zone (3) is equal to the diameter of the stopper body (1), and the minimum diameter of the variable diameter transition zone (3) is equal to the maximum diameter of the stopper head (2).

3. The anti-clogging rod for continuous casting according to claim 1, characterized in that: The height of the variable diameter transition zone (3) is 20mm to 50mm.

4. The anti-clogging rod for continuous casting according to any one of claims 1-3, characterized in that: The inclination angle of the variable diameter transition zone (3) when it contracts inward is not less than 55°.

5. The anti-clogging rod for continuous casting according to claim 4, characterized in that: The inclination angle of the variable diameter transition zone (3) when it contracts inward is 60° to 70°.

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