Pouring device and pouring method for tundish water gap of continuous casting machine

Abstract

The invention relates to a pouring device and a pouring method for a tundish water gap of a continuous casting machine, and belongs to the technical field of continuous casting machine equipment in the metallurgical industry. According to the technical scheme, the device comprises an intermediate tank (1), a tank cover (2), a stopper rod (3), an embedded stopper rod mechanism (7), a composite water gap (13), a pouring ring (14), a seating brick (15) and a lower water gap (16), the pouring ring (14) is arranged on a pouring position of the intermediate tank (1), the seating brick (15) is installed below the pouring ring (14), the composite water gap (13) is installed in the seating brick (15), the lower water gap (16) is installed below the composite water gap (13), the lower end of the stopper rod (3) is arranged in the pouring ring (14) and matched with the composite water gap (13), and the lower end of the stopper rod (3) is connected with the embedded stopper rod mechanism (7). And the embedded stopper mechanism (7) is in driving connection with the upper end of the stopper (3). Accurate control over molten steel flowing out of the intermediate tank and automatic control over the liquid level of the crystallizer can be achieved.

Description

Technical Field

[0001] The invention relates to a pouring device and a pouring method for a tundish nozzle of a continuous casting machine, belonging to the technical field of continuous casting machine equipment in the metallurgical industry. Background Art

[0002] At present, the continuous casting machines in the steel industry have adopted the tundish water inlet quick change technology, which is to send the preheated lower water inlet into the crystallizer and position it in the preparation position, and use the main push cylinder to send the lower water inlet along the slide from the predetermined position of the crystallizer to the working position and combine it with the upper water inlet on the tundish, so as to prevent the accident from stopping the pouring as much as possible. The damaged old water inlet is replaced with a new one safely and stably under the normal state of continuous flow, no deceleration, and no replacement of the tundish within 1s to 2s to maintain normal casting. However, there is a problem in this way: after the replacement, the joint part of the upper water inlet and the lower water inlet will be more or less adhered to cold steel, which not only scratches the joint surface, but also accelerates the oxidation of the joint surface, causing steel drilling accidents, or even bigger accidents. At the same time, the replaced lower water inlet is of fixed caliber, which not only cannot linearly adjust the flow from the tundish to the crystallizer in real time, but also cannot realize the automation of steel production. Summary of the invention

[0003] The purpose of the present invention is to provide a pouring device and a pouring method for a tundish water inlet of a continuous casting machine, which can realize accurate control of molten steel flowing out of the tundish and automatic control of the liquid level of the crystallizer, and solve the problems existing in the background technology.

[0004] The technical solution of the present invention is: A pouring device for a tundish nozzle of a continuous casting machine comprises a tundish, a tank cover, a stopper rod, an embedded stopper rod mechanism, a composite nozzle, a pouring ring, a seat brick and a nozzle. The pouring ring is arranged above the pouring position of the tundish, the seat brick is installed below the pouring ring, the composite nozzle is installed in the seat brick, the nozzle is installed below the composite nozzle, the lower end of the stopper rod is arranged in the pouring ring and cooperates with the composite nozzle, and the embedded stopper rod mechanism is drivingly connected to the upper end of the stopper rod.

[0005] The embedded stopper rod mechanism comprises a lead screw, a crossbeam, a C-shaped guide rod, an electric cylinder and a frame. The cylinder body of the electric cylinder is fixed on the frame, the cylinder head of the electric cylinder is connected to the crossbeam through the C-shaped guide rod, and the crossbeam is connected to the upper end of the stopper rod through the lead screw.

[0006] The frame is fixed to the side of the intermediate tank through a mechanism mounting plate and a fixing plate.

[0007] The fixing plate is fixed on the side of the intermediate tank, and the frame is fixed on the fixing plate through the mechanism mounting plate.

[0008] The pouring ring is an annular slag retaining wall built on the pouring position of the intermediate tank, and its size matches the stopper rod.

[0009] The composite water inlet is an upper water inlet matched with the lower water inlet, and the size of the lower end of the stopper rod matches the composite water inlet.

[0010] A pouring method for a tundish water inlet of a continuous casting machine adopts a pouring device for a tundish water inlet of a continuous casting machine as defined above. During pouring, molten steel in a ladle is first poured into the tundish. When the molten steel overflows the height of a pouring ring, an embedded stopper rod mechanism is used to drive the stopper rod to slowly lift up, so that a gap is opened between the lower end of the stopper rod and the composite water. The molten steel flows into the outlet from the gap between the lower end of the stopper rod and the composite water, and flows into a crystallizer through the outlet, where it is solidified and formed into a cast billet.

[0011] The beneficial effects of the present invention are: accurate control of molten steel flowing out of the tundish and automatic control of the liquid level of the crystallizer can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Partial magnification; Figure 3 This is a front view of the embedded stopper mechanism of the present invention; In the figure: intermediate tank 1, tank cover 2, stopper rod 3, screw 4, cross beam 5, C-shaped guide rod 6, embedded stopper rod mechanism 7, electric cylinder 8, manual operating lever 9, mechanism mounting plate 10, fixing plate 11, crystallizer 12, composite water nozzle 13, pouring ring 14, seat brick 15, downspout 16, frame 17. DETAILED DESCRIPTION

[0013] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0014] See attached Figure 1-3 A pouring device for a tundish nozzle of a continuous casting machine comprises a tundish 1, a tank cover 2, a stopper rod 3, an embedded stopper rod mechanism 7, a composite nozzle 13, a pouring ring 14, a seat brick 15 and a down nozzle 16. The pouring ring 14 is arranged on the pouring position of the tundish 1, the seat brick 15 is installed below the pouring ring 14, the composite nozzle 13 is installed in the seat brick 15, the down nozzle 16 is installed below the composite nozzle 13, the lower end of the stopper rod 3 is arranged in the pouring ring 14 and cooperates with the composite nozzle 13, and the embedded stopper rod mechanism 7 is drivingly connected to the upper end of the stopper rod 3.

[0015] In this embodiment, refer to the attached Figure 1-3 The device is applied to each stream of the intermediate tank of the continuous casting machine, and comprises an intermediate tank 1, a tank cover 2, a stopper rod 3, an embedded stopper rod mechanism 7, a crystallizer 12, a composite nozzle 13, a pouring ring 14, a seat brick 15 and a downspout 16, wherein: The embedded stopper mechanism 7 comprises a lead screw 4, a cross beam 5, a C-shaped guide rod 6, an electric cylinder 8, a manual operating rod 9, a mechanism mounting plate 10, a fixed bottom plate 11 and a frame 17. The embedded stopper mechanism 7 is installed on the pouring positive side of the intermediate tank 1. First, the fixed bottom plate 11 is installed on the positive side of the intermediate tank 1. The electric cylinder 8 is installed in the frame 17, one end of which is connected to the frame 17, and the other end is connected to the cross beam 5 through the C-shaped guide rod 6. One end of the cross beam 5 is connected to the C-shaped guide rod 6, and the other end is connected to the stopper rod 3 through the lead screw 4. In this way, when the electric cylinder 8 works, it can drive the stopper rod 3 to move up and down through the C-shaped guide rod 6.

[0016] The pouring ring 14 is an annular slag retaining wall built on the pouring position of the tundish 1, and its diameter matches the size of the stopper rod 3, and its height is 400mm. The pouring ring 14 raises the water inlet area, which can prevent the wall refractory, residual bulk materials or other foreign matter from gathering at the lower water inlet inlet; at the same time, the pouring ring 14 can also prevent foreign matter from high-temperature bonding at the water inlet inlet during the baking process of the tundish, solving the problem of flow control before the continuous casting of the billet.

[0017] The base brick 15 is installed below the pouring ring 14, and a composite nozzle 13 is installed inside the base brick. The composite nozzle 13 is a common upper nozzle, and its size matches the size of the lower end of the stopper rod 3. A lower nozzle 16 is installed below the composite nozzle 13. The embedded stopper rod mechanism 7 controls the stopper rod 3 to rise or fall through the crossbeam 5 and the lead screw 4, so that the annular gap between the head of the stopper rod 3 and the composite nozzle 13 increases or decreases, thereby controlling the amount of molten steel flowing out of the nozzle of this flow tundish 1. The embedded stopper rod mechanism 7 can automatically control the steel output of each flow nozzle of the tundish 1 through the electric cylinder 8. If the electrical or electric cylinder 8 fails, it can also be manually operated by using the manual operating lever 9.

[0018] The continuous casting machine is generally a multi-strand continuous casting machine. Each strand in the intermediate tank is the same. Taking one strand as an example, the working process of the device is as follows: (1) Standby The working layer and permanent layer of the intermediate tank 1 have been repaired, the pouring ring 14 and the base brick 15 have been installed in place, and the composite water inlet 13 has been installed in the base brick 15; the electric cylinder of the embedded stopper rod mechanism 7 is working, and the annular gap between the head of the stopper rod 3 and the composite water inlet 13 is made gapless through the C-shaped guide rod 6, the cross beam 5, and the screw 4.

[0019] (2) Casting The ladle pours the molten steel into the intermediate tank 1. When the molten steel overflows the pouring ring 14 and reaches a height of 400 mm, the operator presses the automatic pouring button, and the electric cylinder 8 drives the head of the stopper rod 3 and the compound water 13 to slowly open the gap. The molten steel flows from the gap between the head of the stopper rod 3 and the compound water 13 through the downspout 16 into the crystallizer 12, and the molten steel solidifies and forms in the crystallizer 12 to become a cast billet.

[0020] (3) Stop pouring The operator at the post presses the stop pouring button, and the electric cylinder 8 drives the head of the stopper rod 3 and the composite water 13 to slowly close the gap. The molten steel in the tundish 1 no longer enters the crystallizer 12. Under the drive of the tundish car, the tundish 1 is transported to the tundish repair area.

Claims

1. A pouring device for a tundish nozzle of a continuous casting machine, characterized in that: The invention comprises an intermediate tank (1), a tank cover (2), a stopper rod (3), an embedded stopper rod mechanism (7), a composite water outlet (13), a pouring ring (14), a seat brick (15) and a water outlet (16); the pouring ring (14) is arranged above the pouring position of the intermediate tank (1); the seat brick (15) is installed below the pouring ring (14); the composite water outlet (13) is installed in the seat brick (15); the water outlet (16) is installed below the composite water outlet (13); the lower end of the stopper rod (3) is arranged in the pouring ring (14) and matched with the composite water outlet (13); the embedded stopper rod mechanism (7) is drivingly connected to the upper end of the stopper rod (3).

2. A pouring device for a tundish nozzle of a continuous casting machine according to claim 1, characterized in that: The embedded stopper rod mechanism (7) comprises a lead screw (4), a crossbeam (5), a C-shaped guide rod (6), an electric cylinder (8) and a frame (17); a cylinder body of the electric cylinder (8) is fixed on the frame (17); a cylinder head of the electric cylinder (8) is connected to the crossbeam (5) via the C-shaped guide rod (6); and the crossbeam (5) is connected to the upper end of the stopper rod (3) via the lead screw (4).

3. A pouring device for a tundish nozzle of a continuous casting machine according to claim 2, characterized in that: The frame (17) is fixed to the side of the intermediate tank (1) via a mechanism mounting plate (10) and a fixing plate (11).

4. A pouring device for a tundish nozzle of a continuous casting machine according to claim 3, characterized in that: The fixing plate (11) is fixed to the side of the intermediate tank (1), and the frame (17) is fixed to the fixing plate (11) via a mechanism mounting plate (10).

5. The pouring device for the tundish nozzle of a continuous casting machine according to claim 1, characterized in that: The pouring ring (14) is an annular slag retaining wall built on the pouring position of the intermediate tank (1), and its size matches the stopper rod (3).

6. The pouring device for the tundish nozzle of a continuous casting machine according to claim 1, characterized in that: The composite water inlet (13) is an upper water inlet that matches the lower water inlet (16), and the size of the lower end of the stopper rod (3) matches the composite water inlet (13).

7. A pouring method for a tundish nozzle of a continuous casting machine, characterized in that: A pouring device for a tundish water inlet of a continuous casting machine as defined in claims 1 to 6 is used. During pouring, the molten steel in the ladle is first poured into the tundish (1). When the molten steel overflows the height of the pouring ring (14), the stopper rod (3) is slowly lifted up by an embedded stopper rod mechanism (7), so that a gap is opened between the lower end of the stopper rod (3) and the composite water (13). The molten steel flows from the gap between the lower end of the stopper rod (3) and the composite water (13) into the water outlet (16), and then flows into the crystallizer (12) through the water outlet (16), where it is solidified and formed into a cast billet.

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