Connecting structure of water gap and long water gap of continuous casting ladle

Abstract

A connecting structure of a continuous casting ladle upper nozzle and a long nozzle, belongs to the technical field of continuous casting ladle equipment, is used for improving the protection pouring efficiency at the long nozzle. The technical scheme is that the inverted conical ring of the upper nozzle is opposite to the bowl-shaped interface of the long nozzle, the lower end of the inverted conical ring of the upper nozzle is increased with a flow guide body, the flow guide body is composed of a horizontal isolation ring and a vertical flow guide ring, the outer circumference of the isolation ring is welded and connected with the lower end edge of the inverted conical ring of the upper nozzle, the inner hole circumference of the isolation ring is located at the inner side of the bowl-shaped interface of the long nozzle, the inner hole circumference of the isolation ring is welded and connected with the upper end of the flow guide ring, so that the lower end of the flow guide ring is below the bottom surface of the bowl mouth of the long nozzle. The utility model has the advantages of simple structure, convenient use, can reduce the erosion of molten steel to the sealing connection of the long nozzle, reduce the cleaning frequency of the bowl mouth of the long nozzle, ensure the cleanliness of the bowl mouth of the long nozzle, thereby strengthen the sealing property, achieve the purpose of protection pouring, thereby improve the continuous casting production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to a connection structure for the upper nozzle of a continuous casting ladle that can reduce the erosion of the long nozzle by molten steel, and belongs to the technical field of continuous casting ladle equipment. Background Technology

[0002] The top nozzle of the continuous casting ladle is a crucial piece of equipment used for pouring molten steel, and its design significantly impacts steel quality and the continuous casting process. During continuous casting, molten steel needs to be poured through the top nozzle and the long nozzle, and the sealing performance of this connection determines its ability to protect the pouring process. Currently, the connection structure between the top and long nozzles consists of a bowl-shaped interface at the upper end of the long nozzle and an inverted conical ring at the lower end of the top nozzle. The bottom edge of the inverted conical ring at the lower end of the top nozzle rests against the bottom circumference of the bowl-shaped interface at the upper end of the top nozzle, allowing molten steel to flow down through the inner cavity of the inverted conical ring into the long nozzle. During this process, molten steel falls along the inner wall of the inverted conical ring of the top nozzle onto the circumferential bottom surface of the bowl-shaped interface of the long nozzle, eroding the bowl-shaped interface and compromising the sealing performance of the connection between the top and long nozzles. Simultaneously, slag solidifies at the bowl-shaped opening of the long nozzle, requiring continuous cleaning of this area. Therefore, the existing connection structure between the inlet and the long inlet affects the continuous casting process, and it is essential to improve the connection structure at the existing inlet and long inlet. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a connection structure between the top nozzle and the long nozzle of a continuous casting ladle. This connection structure can reduce the erosion of the connection and sealing area between the molten steel and the long nozzle, reduce the number of times the bowl-shaped interface of the long nozzle needs to be cleaned, ensure that the bowl-shaped interface of the long nozzle is clean, strengthen the sealing performance of the connection of the long nozzle, and improve the continuous casting production efficiency and product quality.

[0004] The technical solution to the above technical problem is:

[0005] A connection structure between the top nozzle and the bottom nozzle of a continuous casting ladle includes an inverted conical ring for the top nozzle and a bowl-shaped interface for the bottom nozzle. The inverted conical ring of the top nozzle is connected to the bowl-shaped interface of the bottom nozzle. The improvement is that a guide fluid is added to the lower end of the inverted conical ring of the top nozzle. The guide fluid consists of a horizontal isolation ring and a vertical guide ring. The outer circumference of the isolation ring is welded to the lower edge of the inverted conical ring of the top nozzle. The inner circumference of the isolation ring is located inside the bowl-shaped interface of the bottom nozzle. The inner circumference of the isolation ring is welded to the upper end of the vertical guide ring. The lower end of the guide ring is located below the bottom surface of the bowl-shaped interface of the bottom nozzle.

[0006] In the connection structure between the upper and lower nozzles of the continuous casting ladle, the guide ring at the lower end of the upper nozzle is an inverted cone shape, with the lower end of the inverted cone inclined to the center of the guide ring, and the lower edge of the inverted cone of the guide ring being lower than the bottom surface of the bowl-shaped interface of the lower nozzle.

[0007] In the connection structure between the upper and lower nozzles of the continuous casting ladle, the height of the guide ring at the lower end of the upper nozzle is 20mm, and the gap between the circumferential edge of the guide ring and the inner wall of the lower nozzle is 10mm.

[0008] The beneficial effects of this utility model are:

[0009] This invention incorporates a guide fluid. The isolation ring of the guide fluid can prevent molten steel from falling onto the bottom surface of the bowl-shaped interface of the long nozzle, thus avoiding the erosion of the bowl-shaped interface by the molten steel. The guide ring of the guide fluid can guide the molten steel from the upper nozzle into the long nozzle, preventing the molten steel from entering the gap between the outer wall of the upper nozzle and the inner wall of the long nozzle.

[0010] This utility model has a simple structure and is easy to use. It can reduce the erosion of the connection and sealing of the long nozzle by molten steel, reduce the number of times the bowl-shaped interface of the long nozzle needs to be cleaned, ensure that the bowl-shaped interface of the long nozzle is clean, and strengthen the sealing of the long nozzle connection, thereby achieving the purpose of protecting the casting and improving the continuous casting production efficiency and product quality. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] The markings in the diagram are as follows: 1. Inlet water inlet; 2. Inverted conical ring; 3. Long water inlet; 4. Bowl-shaped interface; 5. Guide flow; 6. Isolation ring; 7. Guide flow ring. Detailed Implementation

[0013] This utility model consists of an upper water inlet 1, an inverted conical ring 2, a long water inlet 3, a bowl-shaped interface 4, and a guide fluid 5.

[0014] The diagram shows that the inverted conical ring 2 of the upper nozzle 1 is opposite to the bowl-shaped interface 4 of the long nozzle 3. A guide fluid 5 is added to the lower end of the inverted conical ring 2 of the upper nozzle 1. After passing through the inverted conical ring 2 of the upper nozzle 1, the molten steel does not come into contact with the bowl-shaped interface 4 of the long nozzle 3, but flows into the long nozzle 3 through the guide fluid 5.

[0015] As shown in the figure, the guide ring 5 consists of a horizontal isolation ring 6 and an upright guide ring 7. The outer circumference of the isolation ring 6 is welded to the lower edge of the inverted conical ring 2 of the upper water inlet 1. The inner circumference of the isolation ring 6 is located inside the bowl-shaped interface 4 of the long water inlet 3. The inner circumference of the isolation ring 6 is welded to the upper end of the upright guide ring 7. The lower end of the guide ring 7 is located below the bottom surface of the bowl-shaped interface 4 of the long water inlet 3.

[0016] As shown in the figure, the guide ring 7 of the guide fluid 5 at the lower end of the upper nozzle 1 is an inverted cone shape. The lower end of the inverted cone is inclined to the center of the guide ring 7, and the lower edge of the inverted cone of the guide ring 7 is lower than the bottom surface of the bowl-shaped interface 4 of the long nozzle 3. This shape can prevent molten steel from entering the gap between the outer wall of the upper nozzle and the inner wall of the long nozzle.

[0017] This invention allows molten steel to detach from the bottom of the bowl-shaped interface 4 of the long nozzle 3, reducing the adhesion and erosion of the bowl-shaped interface 4 by the downstream molten steel. This reduces the number of times the long nozzle 3 needs to be cleaned, achieving the purpose of sealing the connection between the upper nozzle 1 and the long nozzle 3. Furthermore, it increases the service life of the long nozzle 3, reduces the labor intensity of maintenance work, saves subcontracting connection time, reduces process accidents, and ensures stable steel composition and smooth production.

[0018] An embodiment of this utility model is as follows:

[0019] The lower end of the inverted conical ring 2 of the inlet 1 has a diameter of 130mm and a height of 75mm;

[0020] The upper diameter of the bowl-shaped interface 4 of the long water inlet 3 is 162mm, the lower diameter is 138mm, the height is 55mm, and the circumference width of the bottom surface is 90mm.

[0021] The outer diameter of the isolation ring 6 of the guide ring 5 is 132mm, the inner diameter is 80mm, the upper diameter of the guide ring 7 is 75mm, the lower diameter is 60mm, and the height is 20mm.

Claims

1. A connection structure between the top nozzle and the long nozzle of a continuous casting ladle, comprising an inverted conical ring (2) of the top nozzle (1) and a bowl-shaped interface (4) of the long nozzle (3), wherein the inverted conical ring (2) of the top nozzle (1) and the bowl-shaped interface (4) of the long nozzle (3) are opposite to each other, characterized in that: The lower end of the inverted conical ring (2) of the upper water inlet (1) is added with a guide fluid (5). The guide fluid (5) consists of a horizontal isolation ring (6) and an upright guide ring (7). The outer circumference of the isolation ring (6) is welded to the lower edge of the inverted conical ring (2) of the upper water inlet (1). The inner circumference of the isolation ring (6) is located inside the bowl-shaped interface (4) of the long water inlet (3). The inner circumference of the isolation ring (6) is welded to the upper end of the upright guide ring (7). The lower end of the guide ring (7) is located below the bottom surface of the bowl-shaped interface (4) of the long water inlet (3).

2. The connection structure between the upper nozzle and the long nozzle of the continuous casting ladle according to claim 1, characterized in that: The guide ring (7) of the guide fluid (5) at the lower end of the upper water inlet (1) is an inverted cone shape. The lower end of the inverted cone is inclined to the center of the guide ring (7). The lower edge of the inverted cone of the guide ring (7) is lower than the bottom surface of the bowl-shaped interface (4) of the long water inlet (3).

3. The connection structure between the upper nozzle and the long nozzle of the continuous casting ladle according to claim 2, characterized in that: The height of the guide ring (7) of the guide fluid (5) at the lower end of the upper water inlet (1) is 10-20mm, and the gap between the circumferential edge of the lower end of the guide ring (7) and the inner wall of the long water inlet (3) is 20-30mm.

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