SU1202697A1 - Device for automatic control of operation of continuous casting machine mould - Google Patents

Description

The invention relates to various technological processes, namely, to foundry, more precisely to continuous casting of metals, and can be used in control systems of the operating mode of the mold of machines for continuous casting of metal.

The purpose of the invention is to increase the reliability of the continuous casting machine.

The drawing depicts the offer. device.

The device contains a metal level sensor 1 in the crystallizer, a multiplier of 2 signals, the input of which is connected to the output of sensor 1, a switch 3, a signaling device 4, the first input of switch 3 is connected to the first output of the multiplier 2 signals, and the second output of the breeder 2 signal is connected to the input the detector 4, the first of which is connected to the second input of the switch

3, key 5, the first input of which is connected to the second output of the detector

4, the sensor 6 of the temperature of the head part of the ingot, the output of which is connected to the second input of the key 5, the differentiator 7, the algebraic adder 8, the input of the differentiator 7 is connected to the output of the key 5, and the output of the differentiator to the first input of the algebraic adder 8, the setting device 9 specified the rate of drop in the temperature of the head part of the ingot, connected to the second input of the algebraic adder 8, the controller 10 for supplying metal to the mold, the first input of which is connected to the output of the algebraic adder 8 and the second input to the output commutator Oral 3 signals, the output of the controller 10 is connected to the input of the actuator 11 that controls the movement of the stopper

12 force-measuring sensors 13, measuring the pull force of the ingot from the mold, a normalizing transducer 14, to the input of which the indicated sensors are connected, a former 15, the speed of change of the drawing force, to the input of which the output of the normalizing converter 14 is connected, the second algebraic with 16 mm; to the first input of which the output of the former 15 is connected to the rate of change of the stretching force, the unit 17 of the maximum speed of

0

five

Ny with the second input of the second algebraic adder 16, block 18 of one-sided limitation, to the input of which the output of the second algebraic adder 16 is connected, the output of block 18 of one-sided limitation is connected to the first input of the third algebraic adder 19, the second input of which is connected to the output of the second block 20 of one-sided limitation, input of the second unit 20 one-sided limitation is connected to the output of the first algebraic sum- 5 mater 8, and the output of the third algebraic adder 19 is connected to the electric drive 21 tons of numerical cells Tei.

The device works as follows.

After opening the stopper 12, the crystallizer is filled with liquid metal. Upon reaching the metal level of a certain height mark of the crystallizer, which is fixed by the signal from sensor 1, the electric drive of 21 tons of the stands and the swing mechanism of the crystallizer turn on. At the same time, the signals from the ingot temperature sensor 6 and the force measuring sensors 13 begin to be analyzed. The signals from sensor 6, pass key 5, are differentiated by differentiator 7 and compared on the algebraic adder 8

5 with a signal from the setter 9. Allocator. at the output of the algebraic adder 8, the difference enters the regulator 10 for supplying the metal to the mold, which controls the executive mechanism 11 so that the filling time of the crystallizer with liquid metal ensures the rate of temperature drop of the head part of the ingot equal to or greater than the rate of temperature drop specified setting device 9.- At the same time, the signal from the force-measuring sensors, normalized by converter 14, passes to the shaper 15 of the rate of change of the drawing force and compares c on the second algebraic adder 16 with a predetermined limiting rate of increase in the stretching force from the setters 17. If the growth rate of the plant's stretching force exceeds the given one, then the unilateral limitation unit 18 skips this difference to the first algebraic input

0

3

adder 19, the second input of which receives a signal through the second block 20 of a one-way restriction. from the first algebraic adder 8. A signal arrives at the input of the electric drive of 21 tons of empty stands in the direction of slowing down the rate of ingot drawing.

After the metal level reaches the set height of the mold, the signal through the multiplier 2 signals goes to switch 3 and alarm 4. Key 5 and switch 3 receive a pulse to turn off differentiator 7 and turn on the stationary metal level control system in the mold.

The use of the proposed device will improve the reliability

97

the work of the continuous casting of metal by reducing the number of breakthroughs of the liquid metal under the mold.

Serial strain gauges of the DSTB type can be used as sensors of ingot pull force, and the converter is used as a normalizing transducer.

NP-T, as the shaper of the rate of change of the stretching forces, the serial differentiator D-1 of the Cascade series can be used, as a block of one-sided limitation

cheni - non-linear conversion unit (BNP) of the AKESR series with functional dependence

Y

20

K at X O X at X O

VNIIPI Order 8353/11 Circulation 746 Subscription Branch PPP Patent, Uzhgorod, Proektna St., 4

Claims (1)

AUTOMATIC CONTROL MODE OF OPERATION OF THE CRYSTALLIZER OF MACHINES OF CONTINUOUS METAL CASTING, containing a metal level sensor in the mold, a signal multiplier, the input of which is connected to the output of the specified sensor, a switch, a signaling device, while the first input of the switch is connected to the first signal output of the multiplier connected to the input of the detector, the first output of which is connected to the second input of the switch, the key, the first input of which is connected to the second output nalizatora, the head portion of the ingot temperature sensor, a second input of which the output is connected key differentiator, the algebraic adder, the input of the differentiator is connected to the output switch, and the output of the differentiator - the first input of the algebraic. the adder, the speed controller for the temperature drop of the head of the ingot, connected to the second input of the algebraic adder, the regulator of the metal in the mold, the first input of which is connected to the output of the algebraic adder, and the second input is connected to the output of the signal switch, the output of the controller is connected to the input of the actuator, different the fact that, in order to increase the reliability of the continuous metal casting machine, power sensors, a normalizing converter, and a pulling speed change factor, a second and third algebraic adders, a limit speed limiter of the ingot pulling force increase and two one-sided limiting blocks, the outputs of the one-sided limiting blocks connected to the inputs of the third algebraic adder, the input of the first limiting block connected to the output of the second algebraic adder, and the input of the second restriction block - to the output of the first algebraic adder, to the first input of the second algebraic adder is connected output setpoint limit speed increasing force pulling the ingot, and second- input - output ramp generator pulling force, which is connected to the input of the normalizing output inverter having an input connected to the outputs silo "measurement sensors, and the output of the third algebraic adder is connected to the actuator.