Thin strip casting core nozzle

Abstract

The utility model relates to continuous casting nozzle technical field provides a kind of thin strip continuous casting core nozzle, including nozzle and adjusting structure, the inside of the nozzle is provided with inner chamber, the inside of the inner chamber is provided with adjusting structure.The utility model is provided with adjusting structure, by starting deceleration motor and driving flow guide plate rotation, and then it is convenient to control the flow speed of metal liquid, and the inside of flow guide plate is provided with porous structure, to be able to disperse metal flow, improve the uniformity of metal liquid, and then make metal liquid from flow guide groove outward under the inclination angle of boss Stable casting, avoid the uneven thickness of strip or broken strip caused by flow fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of continuous casting nozzle technology, and in particular to a core nozzle for thin strip continuous casting. Background Technology

[0002] The continuous casting nozzle is a refractory component installed in the continuous casting machine's gating system. As the only channel for molten steel to flow from the tundish to the crystallizer, it plays a role in regulating the flow rate, guiding the flow, and stabilizing the temperature of the molten steel. A core nozzle for thin strip continuous casting is a key flow control component in the thin strip continuous casting process. Located at the end of the molten metal conveying system, it is directly responsible for accurately distributing and stably conveying liquid metal (such as steel, aluminum, copper, etc.) to the crystallizing roll or strip forming area to ensure uniform strip thickness, excellent surface quality, and reduce defects such as inclusions and oxidation.

[0003] To this end, patent CN217858778U discloses a core nozzle for thin strip continuous casting, including a core nozzle body. The core nozzle body is provided with a core nozzle inner cavity and an anti-overflow cavity. A baffle is provided between the core nozzle inner cavity and the anti-overflow cavity. The core nozzle inner cavity has a trapezoidal cross-section and a flow stabilizing groove is provided at its bottom. Several guide holes are provided on both sides of the flow stabilizing groove. Several variable diameter holes are provided on both side walls of the core nozzle inner cavity near the bottom. The guide holes and variable diameter holes correspond one-to-one and are interconnected, which can adjust the flow rate and direction of molten steel from the transition ladle or rectifier ladle to ensure the stability and uniformity of the molten pool below.

[0004] The core nozzle for thin strip continuous casting described above uses a fixed-diameter guide hole design, which makes it impossible to dynamically adjust the flow rate of the molten metal according to process requirements. Consequently, the fixed guide structure limits the adjustment of the molten metal flow rate and reduces its practicality. Utility Model Content

[0005] The purpose of this invention is to provide a core nozzle for thin strip continuous casting, which solves the problem that existing core nozzles for thin strip continuous casting are not convenient for adjusting the flow rate.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a core nozzle for thin strip continuous casting, including a nozzle and an adjustment structure;

[0007] The water inlet has an internal cavity, and the internal cavity has an adjustment structure. The adjustment structure includes a boss fixed to the bottom of the internal cavity. The water inlet has guide grooves on both sides of the boss. A rotating shaft is installed inside the internal cavity. A roller is fixed to the outside of the rotating shaft. A guide plate is fixed to the outside of the roller. A reduction motor is fixed to one end of the rotating shaft outside the water inlet.

[0008] A filter structure is installed at the top of the water inlet.

[0009] Preferably, the boss is arc-shaped, the guide grooves are symmetrically distributed on both sides of the water inlet, the guide grooves are inclined, and the interior of the guide grooves is connected to the interior of the inner cavity.

[0010] With the above structure, during use, the molten metal flows downward at the inclined angle of the boss and is poured outward from the guide groove, thereby guiding the flow of the molten metal.

[0011] Preferably, the two ends of the rotating shaft extend through both sides of the inner cavity to the inside of the water inlet and are rotatably connected to the inside of the water inlet, and a protective shell is provided on the outside of the geared motor.

[0012] With the above structure, a protective shell is installed on the outside of the geared motor during use, which can prevent the geared motor from being damaged by high temperature.

[0013] Preferably, both the roller and the guide plate are made of zirconium oxide material, the guide plate has through holes uniformly arranged inside, and the guide plates are evenly distributed on the outside of the roller.

[0014] With the above structure, the metal flow can be dispersed and the uniformity of the molten metal can be improved by setting a porous structure inside the guide plate during use.

[0015] Preferably, the filter structure includes a mounting plate installed at the top of the water inlet, with fixing screws installed inside the mounting plate, and a filter screen fixed on one side of the mounting plate.

[0016] Preferably, the mounting plates are symmetrically distributed at the top of the sprue, and the mounting plates and the sprue are fixedly connected by fixing screws, which are symmetrically distributed inside the mounting plates.

[0017] The above structure makes it easy to disassemble and assemble the filter screen during use, thus facilitating regular cleaning and replacement.

[0018] Preferably, the two sides of the filter screen are fixedly connected to one side of the mounting plate, the filter screen is a three-dimensional mesh structure made of zirconium oxide material, and the filter screen is arc-shaped.

[0019] With the above structure, the arc-shaped filter screen can evenly distribute the molten metal during use, allowing it to enter the inner cavity more smoothly and facilitating filtration to prevent impurities from entering the casting strip and causing defects.

[0020] The advantages of the thin strip continuous casting core nozzle provided by this utility model are as follows:

[0021] By incorporating an adjustment structure and driving the guide plate to rotate via a speed reduction motor, the flow rate of the molten metal can be easily controlled. Furthermore, the presence of a porous structure inside the guide plate disperses the metal flow, improving the uniformity of the molten metal. This allows the molten metal to be poured stably from the guide channel outwards at the tilt angle of the boss, preventing flow fluctuations from causing uneven strip thickness or strip breakage.

[0022] By incorporating a filtration structure with a three-dimensional mesh made of zirconium oxide, the filter facilitates the filtration of molten metal, preventing impurities from entering the casting strip and causing defects. Furthermore, the arc-shaped design of the filter helps to even out the flow of the molten metal, allowing it to enter the inner cavity more smoothly, thus improving its practicality during use. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0025] Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0026] Figure 4 This is a three-dimensional structural diagram of the adjustment structure of this utility model;

[0027] Figure 5 This is a three-dimensional structural diagram of the filter structure of this utility model.

[0028] The following are the annotations in the figure: 1. Water inlet; 2. Inner cavity; 3. Adjustment structure; 301. Boss; 302. Guide channel; 303. Rotating shaft; 304. Roller; 305. Guide plate; 306. Gear motor; 4. Filter structure; 401. Mounting plate; 402. Fixing screw; 403. Filter screen. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-5 The present invention provides a core nozzle for thin strip continuous casting, comprising a nozzle 1 and an adjustment structure 3.

[0031] Reference Figures 1-4 As shown, the sprue 1 has an inner cavity 2, and the inner cavity 2 has an adjustment structure 3. The adjustment structure 3 includes a boss 301 fixed to the bottom of the inner cavity 2. Guide grooves 302 are provided inside the sprue 1 on both sides of the boss 301. A rotating shaft 303 is installed inside the inner cavity 2. A roller 304 is fixed to the outside of the rotating shaft 303. A guide plate 305 is fixed to the outside of the roller 304. A reduction motor 306 is fixed to one end of the rotating shaft 303 outside the sprue 1. The boss 301 is arc-shaped, and the guide grooves 302... 02 is symmetrically distributed on both sides of the sprue 1. The guide groove 302 is set in an inclined shape. The interior of the guide groove 302 is connected to the interior of the inner cavity 2. The two ends of the rotating shaft 303 extend through the two sides of the inner cavity 2 to the interior of the sprue 1 and form a rotating connection with the interior of the sprue 1. The outer side of the reduction motor 306 is provided with a protective shell. The roller 304 and the guide plate 305 are both made of zirconium oxide material. The interior of the guide plate 305 is uniformly provided with through holes. The guide plate 305 is evenly distributed on the outer side of the roller 304.

[0032] By pouring molten metal into the inner cavity 2, and then starting the geared motor 306 to drive the rotating shaft 303, the roller 304 drives the guide plate 305 to rotate. This allows for dynamic control of the flow direction of the molten metal by adjusting the angle of the guide plate 305, reducing turbulence and slag entrapment, controlling the flow rate of the molten metal, and dispersing the metal flow by setting a porous structure inside the guide plate 305, thus improving the uniformity of the molten metal. This allows the molten metal to flow downwards at the inclined angle of the boss 301 and be poured outwards from the guide groove 302, thus enabling stable pouring and avoiding uneven strip thickness or strip breakage caused by flow fluctuations.

[0033] Reference Figure 1 and Figure 5 As shown, a filter structure 4 is installed at the top of the water inlet 1. The filter structure 4 includes a mounting plate 401 installed at the top of the water inlet 1. Fixing screws 402 are installed inside the mounting plate 401. A filter screen 403 is fixed on one side of the mounting plate 401. The mounting plates 401 are symmetrically distributed at the top of the water inlet 1. The mounting plates 401 and the water inlet 1 are fixedly connected by fixing screws 402. The fixing screws 402 are symmetrically distributed inside the mounting plate 401. The two sides of the filter screen 403 are fixedly connected to one side of the mounting plate 401. The filter screen 403 is a three-dimensional mesh structure made of zirconium oxide material and is arc-shaped.

[0034] The mounting plate 401 is installed on the top of the inner cavity 2 by fixing screws 402. The filter screen 403 is a three-dimensional mesh structure made of zirconium oxide material, which makes it easy to filter the molten metal and prevent impurities from entering the casting strip and forming defects. The arc-shaped design of the filter screen 403 can also play a role in equalizing the flow of the molten metal, allowing the molten metal to enter the interior of the inner cavity 2 more smoothly, thereby improving the practical effect during use.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A core nozzle for thin strip continuous casting, comprising a nozzle (1) and an adjustment structure (3); Its features are: The water inlet (1) is provided with an inner cavity (2), and the inner cavity (2) is provided with an adjustment structure (3). The adjustment structure (3) includes a boss (301) fixed to the bottom of the inner cavity (2). The water inlets (1) on both sides of the boss (301) are provided with guide grooves (302). A rotating shaft (303) is installed inside the inner cavity (2). A roller (304) is fixed to the outside of the rotating shaft (303). A guide plate (305) is fixed to the outside of the roller (304). A reduction motor (306) is fixed to one end of the rotating shaft (303) on the outside of the water inlet (1). A filter structure (4) is installed at the top of the water inlet (1).

2. The core nozzle for thin strip continuous casting according to claim 1, characterized in that: The boss (301) is arc-shaped, the guide groove (302) is symmetrically distributed on both sides of the water inlet (1), the guide groove (302) is inclined, and the interior of the guide groove (302) is connected to the interior of the inner cavity (2).

3. The core nozzle for thin strip continuous casting according to claim 1, characterized in that: The two ends of the rotating shaft (303) extend through both sides of the inner cavity (2) to the inside of the water inlet (1) and are rotatably connected to the inside of the water inlet (1). A protective shell is provided on the outside of the geared motor (306).

4. The core nozzle for thin strip continuous casting according to claim 1, characterized in that: Both the roller (304) and the guide plate (305) are made of zirconium oxide material. The guide plate (305) has through holes uniformly arranged inside, and the guide plates (305) are evenly distributed on the outside of the roller (304).

5. The core nozzle for thin strip continuous casting according to claim 1, characterized in that: The filter structure (4) includes a mounting plate (401) installed at the top of the water inlet (1), with fixing screws (402) installed inside the mounting plate (401), and a filter screen (403) fixed on one side of the mounting plate (401).

6. The core nozzle for thin strip continuous casting according to claim 5, characterized in that: The mounting plate (401) is symmetrically distributed at the top of the sprue (1). The mounting plate (401) and the sprue (1) are fixedly connected by fixing screws (402). The fixing screws (402) are symmetrically distributed inside the mounting plate (401).

7. The core nozzle for thin strip continuous casting according to claim 5, characterized in that: The filter screen (403) is fixedly connected to one side of the mounting plate (401) on both sides. The filter screen (403) is a three-dimensional mesh structure made of zirconium oxide material and is arc-shaped.

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