CN205085384U - Excellent hole seal structure of molten steel continuous casting pans stopper - Google Patents

Abstract

The utility model discloses a sealing structure for a plug rod hole of a molten steel continuous casting tundish, in particular to a sealing structure for a plug hole of a molten steel continuous casting tundish applied in the technical field of continuous casting of iron and steel. The utility model provides a plug hole sealing structure for molten steel continuous casting tundish which can effectively prevent the flame from escaping when the tundish is preheated, effectively isolate the heat radiation of molten steel during pouring, and significantly reduce energy consumption, including a tundish, a tank cover, A pull rod and a stopper rod, the tank cover is arranged on the intermediate tank, the pull rod is connected with the stopper rod, and a sealer is also included, the sealer is composed of a sealing cone surface and a tray, and the tray is placed on the tank cover. After adopting the sealing structure of the present application, the pull rod is isolated outside, and the flame will not directly contact the pull rod and the cross arm of the stopper rod mechanism during the baking process. At the same time, the heat radiation of the molten steel is reduced during the molten steel pouring process, and the oxidation of the stopper rod mechanism and the tie rod is slowed down. Neck reduction and deformation reduce the cost of stopper rod mechanism and tie rod, and reduce energy consumption.

Description

Sealing structure of stopper hole in molten steel continuous casting tundish

technical field

The utility model relates to a sealing structure for a plug hole of a molten steel continuous casting tundish, in particular to a sealing structure for a plug hole of a molten steel continuous casting tundish applied in the technical field of continuous casting of iron and steel.

Background technique

Continuous casting technology is a new process of continuously casting liquid metal into a certain cross-sectional shape through a set of special cooling and supporting devices. Its appearance has fundamentally changed the dominant steel ingot for a century - bloom Craft ^[1] . Compared with the traditional mold injection steel process, continuous casting steel has many advantages such as simplified production process, high metal yield, low energy consumption, high degree of automation, high productivity, and good quality of billet. It has become an epoch-making steel industry in the history of steel industry. one of the important technologies. The development and application of continuous steel casting technology is another major technological revolution in iron and steel production after the oxygen converter. It is the most active branch in the field of metallurgy and one of the fastest growing technologies in the field of steelmaking. Continuous casting technology has produced a huge impetus to the development of the world's steel industry. At present, the rapid development of continuous casting production has become the main technical driving force to promote the vigorous development of steelmaking and the entire steel production.

In the process of continuous steel casting, the tundish is a container for molten steel connected between the ladle and the crystallizer. It has the functions of decompression, diversion, removal of inclusions and storage of molten steel, and can realize continuous casting of multiple furnaces. At present, the tundish control methods of molten steel entering the crystallizer include stopper rod control, sizing nozzle, slide plate and other methods. The stopper rod control device mainly includes a mechanism, a pull rod, and a stopper rod. It controls the opening between the stopper rod and the submerged nozzle bowl of the tundish in a hydraulic or electric manner, so as to achieve the purpose of controlling the flow of molten steel into the mold, as shown in Figure 1 . The tundish needs to be preheated before it is used for molten steel pouring. During the preheating process, the flame escapes from the stopper hole and directly burns the mechanism and tie rod at high temperature, resulting in oxidation and deformation of the mechanism and tie rod, which shortens the service life of the mechanism and tie rod. significantly reduced. Simultaneously because the flame sprang out from the stopper hole, the loss of heat was large, the consumption of gas and air was increased, and the energy consumption was increased. During the pouring process, due to the necking of the tie rod due to oxidation and necking, the connection between the tie rod and the stopper rod is loosened, resulting in unstable flow of molten steel entering the mold, causing fluctuations in the liquid steel level of the mold, resulting in slag rolling, reducing the quality of the billet, and in severe cases, causing mold failure. Vicious accidents such as steel spills have had a great impact on production organizations. Therefore, when there is a loose connection between the tie rod and the stopper rod, measures are often taken to replace the tundish in advance, reducing the number of tundish continuous casting furnaces. However, in actual production, there are many factors that cause the molten steel level of the mold to fluctuate. It is not easy to judge whether the connection between the tie rod and the stopper is loose, and there is a relatively large risk. Therefore, there is no one in the prior art that can effectively prevent the flame from escaping when the tundish is preheated, effectively isolate the heat radiation of molten steel during pouring, prevent the mechanism and tie rods from oxidative deformation, and significantly reduce energy consumption. Pore sealing structure.

Utility model content

The technical problem to be solved by the utility model is to provide a molten steel continuous casting tundish that can effectively prevent the flame from escaping when the tundish is preheated, effectively isolate the heat radiation of molten steel during pouring, prevent the mechanism and tie rods from being oxidized and deformed, and significantly reduce energy consumption. Stopper rod hole sealing structure.

In order to solve the above-mentioned technical problems, the molten steel continuous casting tundish plug rod hole sealing structure adopted by the utility model includes a tundish, a tank cover, a tie rod and a stopper rod, the tank cover is arranged on the tundish tank, and the tank cover is provided with opening, the pull rod is connected with the stopper rod, and the stopper rod is inserted into the intermediate tank from the opening, and a sealer is also included, the sealer is composed of a sealing cone surface and a tray, and the sealing cone surface is sleeved on the On the stopper rod, the end of the sealing cone with a small cross-sectional diameter extends into the intermediate tank from the opening, the tray is connected to the edge of the end with a large sealing cone cross-sectional diameter, and the tray is placed on the tank cover.

Further, the sealer is a split structure.

Further, the tray is a disc with a circular surface cut out in the middle.

Further, a handle is provided on the tray of the sealer.

The beneficial effects of the utility model are: after adopting the sealing structure of the present application, the pull rod is isolated outside, the flame will not directly contact the pull rod and the cross arm of the stopper mechanism during the baking process, and at the same time, the heat radiation of molten steel is reduced during the molten steel pouring process , to slow down the oxidation necking and deformation of stopper mechanism and tie rod, reduce the cost of stopper mechanism and tie rod, and reduce energy consumption; ensure the stability of the molten steel surface of the mold, reduce the pollution of molten steel, and improve the cleanliness of molten steel; avoid overflow of the mold Breakout; increase the number of tundish continuous casting furnaces.

Description of drawings

Fig. 1 is a schematic diagram of a tundish stopper rod controlling molten steel flow;

Fig. 2 is the structural representation of the present application;

Fig. 3 is the top view of the sealer of the present application;

Fig. 4 is the front view of the sealer of the present application;

Parts, parts and numbers in the figure: tundish 1, tank cover 2, tie rod 3, stopper rod 4, sealing cone 5, tray 6.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Fig. 1, Fig. 2, Fig. 3, and Fig. 4, the sealing structure of the stopper rod hole of the molten steel continuous casting tundish of the present utility model includes a tundish 1, a tank cover 2, a tie rod 3 and a stopper rod 4, the tank The cover 2 is arranged on the intermediate tank 1, the tank cover 2 is provided with an opening, the pull rod 3 is connected with the stopper rod 4, and the stopper rod 4 is inserted into the intermediate tank 1 through the opening, and a sealer is also included , the sealer is composed of a sealing cone 5 and a tray 6, the sealing cone 5 is sleeved on the stopper rod 4, and the end of the sealing cone 5 with a small section diameter extends into the intermediate tank 1 from the opening , the tray 6 is connected to the edge of the end with a larger cross-sectional diameter of the sealing cone 5 , and the tray 6 is placed on the can lid 2 . In use, in order to ensure the sealing effect, the size of the hole at the lower end of the sealing cone surface 5 can be the same as that of the stopper rod 4, so that the sealing cone surface 5 is set behind the stopper rod 4 to fit with the stopper rod 4 to form a seal. In order to ensure the sealing effect, the sealer can be made of asbestos. During use, the tray 6 is placed on the can lid 2, and the sealer is supported by the can lid 2. At this time, the sealer, the stopper rod 4 and the can lid 2 form a closed space, and the pull rod 3 is isolated outside, so that the flame will It will not be in direct contact with the cross arm of the tie rod 3 and the stopper rod 4 mechanism. At the same time, the heat radiation of the molten steel is reduced during the molten steel pouring process, and the oxidation necking and deformation of the stopper rod 4 mechanism and the tie rod 3 are slowed down, and the stopper 4 mechanism and the tie rod 3 are reduced. Use cost, and reduce energy consumption; ensure the stability of the liquid steel surface of the mold, reduce the pollution of molten steel, improve the cleanliness of molten steel; avoid steel overflow from the mold; increase the number of tundish 1 continuous casting furnaces.

The sealer is a split structure. In order to facilitate installation and use, the sealer can be set into a split structure, the sealer can be divided into two from the middle, and then assembled into a whole when in use.

Described pallet 6 is the disc that digs out a circular face in the middle. The tray 6 is designed as a disc structure, so that the sealer is not limited by the angle during installation, that is, the sealer can be installed at any angle along the central axis of the stopper rod 4, and plays a sealing role.

The tray 6 of the sealer is provided with a handle. In order to facilitate the installation and removal of the sealer, a handle is provided on the tray 6 of the sealer. During installation, the operator can hold the handle to place the sealer at the installation position; during disassembly, the operator can hold the handle to take out the sealer.

Claims (4)

1. The sealing structure of the stopper rod hole of the molten steel continuous casting tundish, including the tundish (1), the tank cover (2), the tie rod (3) and the stopper rod (4), and the tank cover (2) is arranged on the tundish (1 ), the lid (2) is provided with an opening, the pull rod (3) is connected to the stopper rod (4), and the stopper rod (4) is inserted into the intermediate tank (1) from the opening, It is characterized in that it also includes a sealer, the sealer is composed of a sealing cone (5) and a tray (6), the sealing cone (5) is sleeved on the stopper rod (4), and the sealing cone (5) The end with a small cross-sectional diameter extends into the intermediate tank (1) from the opening, and the tray (6) is connected to the edge of the end with a large cross-sectional diameter of the sealing cone (5), and the tray (6) overlaps Place on jar lid (2). 2. The sealing structure for the plug hole of the molten steel continuous casting tundish according to claim 1, characterized in that: the sealer is a split structure. 3. The liquid steel continuous casting tundish stopper hole sealing structure according to claim 1, characterized in that: the tray (6) is a disc with a circular surface cut out in the middle. 4. The sealing structure for the plug hole of the molten steel continuous casting tundish according to claim 1, characterized in that: the tray (6) of the sealer is provided with a handle.