Continuous casting tundish cover plate

Abstract

The utility model discloses a continuous casting tundish cover plate, which relates to the tundish technical field, and comprises a cover plate and a charging port, a first heat exchange cavity and a second heat exchange cavity are arranged in the cover plate, one side of the lower surface of the cover plate is provided with an exhaust port, the exhaust port is connected with the first heat exchange cavity, the other side of the lower surface of the cover plate is provided with an air inlet, and the air inlet is connected with the second heat exchange cavity. The air inlet is connected with the second heat exchange cavity, the side, away from the exhaust port, of the first heat exchange cavity is connected with an exhaust pipe, the side, away from the air inlet, of the second heat exchange cavity is connected with an air inlet pipe, a closed box is fixedly arranged at the position, located above the feeding port, of the outer side of the cover plate, and a blocking plate is hinged to the interior of the closed box. The closed box forms a closed space, automatic closing of the feeding port is achieved, argon is heated by arranging the first heat exchange cavity and the second heat exchange cavity, and the situation that molten steel is rapidly cooled when the argon makes contact with the molten steel is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of tundishes, in particular to a continuous casting tundish cover plate. Background Art

[0002] In the steelmaking system, the tundish is the intermediate container between the ladle and the crystallizer. In order to enhance the thermal insulation effect of the tundish, the tundish is generally equipped with a tundish cover to play a role in thermal insulation and prevent the splashing of molten steel and slag, protect the safety of employees and equipment, and improve the working environment;

[0003] For example, the utility model patent with the announcement number CN210023749U discloses a new type of argon-blown tundish cover, including a tundish cover body, on which a molten steel injection hole, a temperature measurement and feeding hole, and a stopper rod hole are provided. A branch argon pipeline is pre-buried in one side of the tundish cover body, one end of which is connected to the argon main pipeline through a quick-change joint, and the other end of which is a plurality of branch pipelines pre-buried in the tundish cover body, with the end of each branch pipeline pointing downward to the inside of the tundish and extending to the outside of the bottom of the tundish cover body. Its application method is also disclosed;

[0004] However, the utility model cannot preheat the argon gas entering the tundish, causing the argon gas to cool down the molten steel quickly when it contacts the molten steel. At the same time, the utility model cannot realize the automatic sealing function of the feeding holes on the tundish cover, causing external air to easily enter the tundish. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a continuous casting tundish cover plate to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a continuous casting tundish cover plate, comprising a cover plate and a feeding port, a first heat exchange chamber and a second heat exchange chamber are provided in the cover plate, an exhaust port is provided on one side of the lower surface of the cover plate, the exhaust port is connected to the first heat exchange chamber, an air inlet is provided on the other side of the lower surface of the cover plate, the air inlet is connected to the second heat exchange chamber, an exhaust pipe is connected to the side of the first heat exchange chamber away from the exhaust port, and an air inlet pipe is connected to the side of the second heat exchange chamber away from the air inlet, a closed box is fixedly provided on the outer side of the cover plate above the feeding port, and a sealing plate is hinged in the closed box.

[0007] Preferably, a rotating shaft is rotatably connected inside the closed box, the sealing plate is fixedly mounted on the rotating shaft, an extension rod is fixedly provided on the side of the rotating shaft away from the sealing plate, a counterweight is fixedly provided on the extension rod, and a baffle is fixedly provided above the sealing plate inside the closed box.

[0008] Preferably, the first heat exchange chamber is located below the second heat exchange chamber.

[0009] Preferably, an air distribution plate is fixedly provided in the air inlet.

[0010] Beneficial Effects

[0011] The utility model provides a continuous casting tundish cover plate, which has the following beneficial effects: when the molten steel injection pipe is pulled out after the injection of molten steel is completed, the sealing plate can be pressed against the baffle plate under the action of the counterweight block, so that the closed box forms a closed space, and the feeding port is automatically closed to prevent external air from entering the tundish; by providing a first heat exchange chamber and a second heat exchange chamber, the heat of the exhaust gas and the heat brought by the molten steel baking the cover plate can be used to heat the argon gas, thereby realizing the heating of the argon gas and preventing the argon gas from rapidly cooling the molten steel when it contacts the molten steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the main internal structure diagram of the utility model.

[0013] In the figure: 1. cover plate; 2. feeding port; 3. first heat exchange chamber; 4. second heat exchange chamber; 5. exhaust port; 6. air inlet; 7. air inlet pipe; 8. exhaust pipe; 9. closing box; 10. rotating shaft; 11. sealing plate; 12. extension rod; 13. counterweight block; 14. baffle; 15. air distribution plate. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0015] See also Figure 1The utility model provides a technical solution: a continuous casting tundish cover plate, comprising a cover plate 1 and a feeding port 2, a first heat exchange chamber 3 and a second heat exchange chamber 4 are provided in the cover plate 1, the first heat exchange chamber 3 is located below the second heat exchange chamber 4, an exhaust port 5 is provided on one side of the lower surface of the cover plate 1, the exhaust port 5 is connected to the first heat exchange chamber 3, an air inlet 6 is provided on the other side of the lower surface of the cover plate 1, the air inlet 6 is connected to the second heat exchange chamber 4, an exhaust pipe 8 is connected to the side of the first heat exchange chamber 3 away from the exhaust port 5, and an air inlet pipe 7 is connected to the side of the second heat exchange chamber 4 away from the air inlet 6, argon can enter the second heat exchange chamber 4 through the air inlet pipe 7, and then be discharged into the tundish through the air inlet 6, because the density of argon is greater than that of air, the argon will be discharged from bottom to top, The air in the tundish is gradually squeezed out from the air inlet 6 to the exhaust port 5. By continuously injecting argon into the tundish, it can be ensured that the top of the molten steel is always filled with argon. The air or argon in the tundish can enter the first heat exchange chamber 3 through the exhaust port 5. The air or argon can be heated by the molten steel. When the heated gas enters the first heat exchange chamber 3, the gas in the second heat exchange chamber 4 can be heated, thereby heating the argon entering the tundish. In addition, the baking of the molten steel will also heat the cover plate 1 as a whole. A closed box 9 is fixedly provided on the outer side of the cover plate 1 above the feeding port 2. A sealing plate 11 is hinged in the closed box 9. The flipping of the sealing plate 11 can prevent external air from entering the tundish through the feeding port 2.

[0016] As an embodiment of the utility model, a rotating shaft 10 is rotatably connected inside the closed box 9, and a sealing plate 11 is fixedly installed on the rotating shaft 10. An extension rod 12 is fixedly provided on the side of the rotating shaft 10 away from the sealing plate 11, and a counterweight block 13 is fixedly provided on the extension rod 12. A baffle plate 14 is fixedly provided above the sealing plate 11 in the closed box 9. The counterweight block 13 can make the sealing plate 11 abut against the bottom of the baffle plate 14, so that a closed space is formed in the closed box 9, thereby realizing the closure of the feeding port 2. When the feeding pipe is inserted into the closed box 9, the sealing plate 11 can be pushed downward.

[0017] As an embodiment of the utility model, an air distribution plate 15 is fixedly provided in the air inlet 6. The air distribution plate 15 can prevent the argon gas from being discharged into the tundish too concentratedly, thereby dispersing the argon gas.

[0018] The working principle and use process of the utility model are as follows: when in use, inserting the molten steel injection pipe into the closed box 9 can push the sealing plate 11 to flip downward, so as to inject molten steel into the tundish. When the molten steel injection pipe is pulled out after the molten steel injection is completed, the sealing plate 11 can be pressed against the baffle 14 under the action of the counterweight block 13, so that the closed box 9 forms a closed space, and the feeding port 2 is closed; argon gas can enter the second heat exchange chamber 4 through the air inlet pipe 7, and then be discharged into the tundish through the air inlet 6, and the air or argon gas in the tundish can be allowed to enter the first heat exchange chamber 3 through the exhaust port 5, and finally be discharged through the exhaust pipe 8. The air or argon gas in the tundish can be heated by the molten steel, and the gas with temperature can heat the gas in the second heat exchange chamber 4 when it enters the first heat exchange chamber 3. In addition, the cover plate 1 can also be heated as a whole by the baking of the molten steel, so as to heat the argon gas entering the tundish, and prevent the argon gas from cooling the molten steel rapidly when it contacts with the molten steel.

[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous casting tundish cover plate, comprising a cover plate (1) and a feed port (2), characterized in that: A first heat exchange chamber (3) and a second heat exchange chamber (4) are provided in the cover plate (1); an exhaust port (5) is provided on one side of the lower surface of the cover plate (1), and the exhaust port (5) is connected to the first heat exchange chamber (3); an air inlet (6) is provided on the other side of the lower surface of the cover plate (1), and the air inlet (6) is connected to the second heat exchange chamber (4); an exhaust pipe (8) is connected to the side of the first heat exchange chamber (3) away from the exhaust port (5), and an air inlet pipe (7) is connected to the side of the second heat exchange chamber (4) away from the air inlet (6); a closed box (9) is fixedly provided on the outer side of the cover plate (1) above the feeding port (2), and a sealing plate (11) is hingedly connected to the closed box (9).

2. The continuous casting tundish cover plate according to claim 1, characterized in that: A rotating shaft (10) is rotatably connected inside the closed box (9), the blocking plate (11) is fixedly mounted on the rotating shaft (10), an extension rod (12) is fixedly arranged on the side of the rotating shaft (10) away from the blocking plate (11), a counterweight (13) is fixedly arranged on the extension rod (12), and a baffle (14) is fixedly arranged above the blocking plate (11) inside the closed box (9).

3. The continuous casting tundish cover plate according to claim 1, characterized in that: The first heat exchange chamber (3) is located below the second heat exchange chamber (4).

4. The continuous casting tundish cover plate according to claim 1, characterized in that: An air distribution plate (15) is fixedly arranged inside the air inlet (6).

Images