A sealed argon protection device for ladle pouring

Abstract

The utility model discloses a sealed argon protection device for ladle pouring, including the first sleeve of upper end and the ladle fixed, the water outlet of ladle is located the inboard of first sleeve, is equipped with ring plate below first sleeve, and one side of first sleeve is hinged with one side of ring plate, and is equipped with locking mechanism between the other side of first sleeve and the other side of ring plate, and is equipped with sealing ring between first sleeve and ring plate, the bottom of ring plate is equipped with second sleeve, and the inside and outside of second sleeve are equipped with third sleeve and fourth sleeve respectively, and second sleeve and third sleeve all are fixed with ring plate, and fourth sleeve and second sleeve slidingly connect, and the annular argon pipe is equipped between second sleeve and third sleeve, and the gas inlet of argon pipe projects second sleeve, and is equipped with a plurality of gas outlets on argon pipe. The utility model has the advantages of convenient operation and can improve the quality of steel ingot finished product.

Description

Technical Field

[0001] This utility model belongs to the field of ladle casting, and particularly relates to a sealing argon gas protection device for ladle casting. Background Technology

[0002] Ingot casting is the process by which molten steel flows out from the bottom nozzle of the ladle, passes through the middle pouring pipe, and enters the mold. During this process, the molten steel comes into direct contact with air between the bottom nozzle and the pouring pipe. This contact continues throughout the entire casting stage, which generates oxides on the surface of the molten steel and carries them into the mold, forming oxide inclusions that affect the cleanliness of the steel ingot.

[0003] Currently, there are various types of argon gas protection rings, including heavy refractory material rings and combustion-consuming protection rings. Among them, heavy refractory material rings have a good sealing effect, but the bricks are thick and heavy, making them difficult to operate and unable to adapt to the tight production rhythm on site. Combustion-consuming protection rings can be placed on the top of the injection pipe to remove oxygen from the air through combustion, thus preventing the molten steel from oxidizing. However, combustion will introduce hydrogen into the molten steel, affecting the quality of the finished steel ingot. Utility Model Content

[0004] The purpose of this invention is to provide a sealed argon gas protection device for steel ladle casting. This invention has the advantages of convenient operation and improved quality of finished steel ingots.

[0005] The technical solution of this utility model is as follows: A sealing argon gas protection device for steel ladle casting includes a first sleeve fixed at its upper end to the steel ladle, the drain outlet of the steel ladle being located inside the first sleeve, an annular plate being provided below the first sleeve, one side of the first sleeve being hinged to one side of the annular plate, a locking mechanism being provided between the other side of the first sleeve and the other side of the annular plate, and a sealing ring being provided between the first sleeve and the annular plate; a second sleeve being provided at the bottom of the annular plate, a third sleeve and a fourth sleeve being provided on the inner and outer sides of the second sleeve respectively, the second sleeve and the third sleeve being fixed to the annular plate, the fourth sleeve being slidably connected to the second sleeve, and an annular argon gas pipe being provided between the second sleeve and the third sleeve, the inlet of the argon gas pipe extending out of the second sleeve, and multiple outlets being provided on the argon gas pipe.

[0006] In the aforementioned sealing argon gas protection device for ladle casting, the fourth sleeve is made of fire-resistant fiber cotton, and the upper end of the fourth sleeve is equipped with a quick-release clamp. The fourth sleeve is connected to the second sleeve through the quick-release clamp.

[0007] In the aforementioned sealing argon gas protection device for ladle casting, the first sleeve is hinged to the ring plate via a hinge.

[0008] In the aforementioned sealing argon gas protection device for ladle casting, the locking mechanism includes two pin seats, which are respectively fixed to the outer side of the first sleeve and the upper side of the ring plate, and the two pin seats are connected by a pin.

[0009] In the aforementioned sealing argon gas protection device for ladle casting, annular baffles are provided on both the inner and outer sides of the sealing ring, and the baffles are fixed to the ring plates.

[0010] Compared with existing technologies, this invention features a lighter and more compact heavy refractory ring, improving on-site operational convenience. A liftable fourth sleeve ensures a good seal between the ladle and the pouring pipe. Argon gas is introduced through an argon gas pipe to create an inert atmosphere, isolating the molten steel from air and preventing oxidation. No hydrogen is introduced, resulting in high-quality finished steel ingots. During use, the entire protective device does not come into contact with the molten steel and can be reused, reducing operating costs. The first sleeve and the ring plate can rotate relative to each other, allowing for easy replacement of the drain outlet after ladle pouring, further enhancing operational convenience. In summary, this invention offers advantages such as ease of operation and improved finished steel ingot quality. Attached Figure Description

[0011] Figure 1 This is a front view structural diagram of this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of this utility model when it is opened.

[0013] Figure 3 This is a schematic diagram of the structure of the locking mechanism of this utility model.

[0014] Figure 4 This is a three-dimensional schematic diagram of the present invention.

[0015] The markings in the attached diagram are as follows: 1-First sleeve, 2-Steel ladle, 3-Drain outlet, 4-Ring plate, 5-Sealing ring, 6-Second sleeve, 7-Third sleeve, 8-Fourth sleeve, 9-Argon pipe, 10-Quick release clamp, 11-Hinge, 12-Pin seat, 13-Pin, 14-Baffle, 15-Air inlet, 16-Bell brick, 17-Quartz sand, 18-Intermediate injection pipe. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0017] Example: A sealing argon gas protection device for steel ladle casting, such as Figure 1 As shown, it includes a first sleeve 1 that is welded and fixed to the upper end of the ladle 2, and the drain outlet 3 of the ladle 2 is located inside the first sleeve 1.

[0018] A ring plate 4 is provided below the first sleeve 1. One side of the first sleeve 1 is hinged to one side of the ring plate 4 via a hinge 11. A locking mechanism is provided between the other side of the first sleeve 1 and the other side of the ring plate 4. The locking mechanism includes two pin seats 12, which are respectively fixed to the outer side of the first sleeve 1 and the upper side of the ring plate 4. The two pin seats 12 are connected by a pin 13. When the pin 13 is pulled out, the first sleeve 1 and the ring plate 4 can rotate relative to each other.

[0019] A sealing ring 5 is provided between the first sleeve 1 and the ring plate 4. The sealing ring 5 is made of soft refractory material, such as refractory fiber or soft clay, with a thickness of 10-20 mm. The sealing ring 5 is compressed when the first sleeve 1 and the ring plate 4 are closed to increase the airtightness between them. Annular baffles 14 are provided on both the inner and outer sides of the sealing ring 5. The baffles 14 are fixed to the ring plate 4 and restrict the shape of the sealing ring 5.

[0020] The bottom of the ring plate 4 is provided with a second sleeve 6. The inner and outer sides of the second sleeve 6 are respectively provided with a third sleeve 7 and a fourth sleeve 8. The second sleeve 6 and the third sleeve 7 are both welded and fixed to the ring plate 4. The fourth sleeve 8 is slidably connected to the second sleeve 6. An annular argon pipe 9 is provided between the second sleeve 6 and the third sleeve 7. The inlet 15 of the argon pipe 9 extends out of the second sleeve 6. The argon pipe 9 is provided with multiple outlets.

[0021] The fourth sleeve 8 is made of fire-resistant fiber cotton, such as alumina fiber cotton. The fourth sleeve 8 has the characteristics of a rubber sleeve and has a certain degree of flexibility. The upper end of the fourth sleeve 8 is provided with a quick-release clamp 10, and the fourth sleeve 8 is tightly connected to the second sleeve 6 through the quick-release clamp 10.

[0022] In the embodiments, the parts with specified materials are preferably made of fire-resistant steel, with a wall thickness much thinner than that of fire-resistant bricks, resulting in a smaller overall weight.

[0023] Working principle: such as Figure 1 As shown, the protective device is installed between the ladle 2 and the intermediate injection pipe 18. The inner side of the intermediate injection pipe 18 is equipped with a tubular horn-shaped brick 16. Quartz sand 17 is filled between the intermediate injection pipe 18 and the horn-shaped brick 16. The lower end of the fourth sleeve 8 corresponds to the position of the quartz sand 17 and can be inserted slightly to achieve a seal. Molten steel flows out from the drain outlet 3 at the bottom of the ladle 2, passes through the horn-shaped brick 16 inside the intermediate injection pipe 18, and enters the mold. Before and during injection, argon gas enters the argon pipe 9 from the air inlet 15, and then enters the space between the ladle 2 and the intermediate injection pipe, preventing air from entering and avoiding oxidation of the molten steel.

[0024] After pouring is complete, stop argon injection. Hoist the ladle to the maintenance position, rotate the ladle until its bottom surface is perpendicular to the horizontal plane, remove pin 13, rotate ring plate 4 90 degrees around hinge 11, clean the slag, and replace drain outlet 3. After loosening quick-release clamp 10, the fourth sleeve 8 can be replaced.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., 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 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.

Claims

1. A sealing argon gas protection device for steel ladle casting, characterized in that: The first sleeve (1) is fixed to the upper end of the ladle (2). The drain outlet (3) of the ladle (2) is located inside the first sleeve (1). A ring plate (4) is provided below the first sleeve (1). One side of the first sleeve (1) is hinged to one side of the ring plate (4). A locking mechanism is provided between the other side of the first sleeve (1) and the other side of the ring plate (4). A sealing ring (5) is provided between the first sleeve (1) and the ring plate (4). A second sleeve (6) is provided at the bottom of the ring plate (4). A third sleeve (7) and a fourth sleeve (8) are provided on the inner and outer sides of the second sleeve (6). The second sleeve (6) and the third sleeve (7) are both fixed to the ring plate (4). The fourth sleeve (8) is slidably connected to the second sleeve (6). An annular argon pipe (9) is provided between the second sleeve (6) and the third sleeve (7). The inlet (15) of the argon pipe (9) extends out of the second sleeve (6). Multiple outlets are provided on the argon pipe (9).

2. The sealing argon gas protection device for steel ladle casting according to claim 1, characterized in that: The fourth sleeve (8) is made of fire-resistant fiber cotton. The upper end of the fourth sleeve (8) is provided with a quick-release clamp (10). The fourth sleeve (8) is connected to the second sleeve (6) through the quick-release clamp (10).

3. The sealing argon gas protection device for steel ladle casting according to claim 1, characterized in that: The first sleeve (1) is hinged to the ring plate (4) via a hinge (11).

4. The sealing argon gas protection device for steel ladle casting according to claim 1, characterized in that: The locking mechanism includes two pin seats (12), which are fixed to the outer side of the first sleeve (1) and the upper side of the ring plate (4) respectively, and are connected by a pin (13).

5. The sealing argon gas protection device for ladle casting according to claim 1, characterized in that: The sealing ring (5) is provided with annular baffles (14) on both the inner and outer sides, and the baffles (14) are fixed to the ring plate (4).

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