System and method for controlling level of molten aluminum in front box of aluminum strip billet cast-rolling machine

Abstract

The invention discloses a system and method for controlling the level of molten aluminum in a front box of an aluminum strip billet cast-rolling machine. The system for controlling the level of the molten aluminum in the front box of the aluminum strip billet cast-rolling machine comprises a molten aluminum level detecting device and an automatic molten aluminum level control device, wherein the molten aluminum level detecting device comprises a swinging support, the swinging support is installed on a fixed support in a rotating mode, an angular displacement sensor is installed on the swinging support, the input end of the annular displacement sensor is connected with the middle portion of a horizontal guiding rod, the output end of the annular displacement sensor is connected with the corresponding signal end of a controller, a balancing weight is installed at one end of the horizontal guiding rod, the other end of the horizontal guiding rod is connected with the upper end of a vertical guiding rod, a buoy is connected with the lower end of the vertical guiding rod, the automatic molten aluminum level control device comprises a flow control plug corresponding to a molten aluminum flow control outlet in the front box, and the flow control plug is connected with a plug opening-and-closing control mechanism. The method for controlling the level of the molten aluminum in the front box of the aluminum strip billet cast-rolling machine is realized based on the system for controlling the level of the molten aluminum in the front box of the aluminum strip billet cast-rolling machine. The system and method for controlling the level of the molten aluminum in the front box of the aluminum strip billet cast-rolling machine has the advantages that the level of the molten aluminum in the front box of the aluminum strip billet cast-rolling machine can be automatically controlled in real time, and the control accuracy is high.

Description

technical field [0001] The invention relates to a system and method for controlling the height of liquid aluminum in a front box of an aluminum strip billet casting and rolling machine, and belongs to the technical field of aluminum strip billet casting and rolling. Background technique [0002] The current aluminum strip billet casting and rolling mill includes a holding furnace, a front box, a casting and rolling device, and a coiler. The outlet of the holding furnace is set correspondingly to the inlet of the front box, so that the molten aluminum in the holding furnace can flow into the front box smoothly. Inside, the casting and rolling device includes a frame, casting nozzles, and rolls. The output port of the front box is connected to the casting nozzle, so that the aluminum liquid in the front box flows into the casting nozzle, and the aluminum liquid is injected into the cooling water cooled through the casting nozzle. On the roll, the aluminum liquid is distributed...

AI Technical Summary

Problems solved by technology

[0002] The current aluminum strip billet casting and rolling mill includes a holding furnace, a front box, a casting and rolling device, and a coiler. The outlet of the holding furnace is set correspondingly to the inlet of the front box, so that the molten aluminum in the holding furnace can flow into the front box smoothly. Inside, the casting and rolling device includes a frame, casting nozzles, and rolls. The output port of the front box is connected to the casting nozzle, so that the aluminum liquid in the front box flows into the casting nozzle, and the aluminum liquid is injected into the cooling water cooled through the casting nozzle. On the roll, the aluminum liquid is distributed along the width of the roll surface, cooled and solidified, and then rolled and formed by the roll to form a cast-rolled aluminum strip, and then after the cast-rolled aluminum strip leaves the roll gap, it passes through the lead-out roll and the pinch roll in turn , hydraulic shears, and deflector rolls are processed by the coiler, so that workers unload the coil from the coiler to complete the entire casting and rolling production process. Among them, the aluminum liquid level in the front box and the rolling center It is one of the necessary conditions to ensure continuous casting and rolling production and product quality to achieve a balance between the static pressure of the molten aluminum supply and flow generated by the height difference of the line plane and the surface tension of the molten aluminum in the casting and rolling area. The flow control is the key factor. Once the fluctuation range of the aluminum liquid level in the front box exceeds the allowable value, it will cause surface defects in the cast-rolled aluminum strip. If it is serious, it will also cause aluminum leakage or plate breakage accidents.

At present, most of the existing flow control methods use manual flow control, and there are also mechanical flow control, but the control accuracy of the artificial flow control and mechanical flow control on the aluminum liquid level is very low, and the labor intensity of the workers is high, and the operation is safe. poor, room for improvement

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