SU1488264A1 - Arrangement for controlling glass melt feeder - Google Patents

Description

The invention relates to the glass industry, allows regulation accuracy. Contains a furnace transformer 1, lower 2 and upper 3 pairs of electrodes, current sensor 4 in the lower pair of electrodes, voltage sensor 5 on the electrodes, division unit 6, voltage regulator 7, control unit 8, current sensor 9 in the upper electrode pair, subtraction unit 10 , regulator 11 loaders 12 charge. 1 il.

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1488264

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The invention relates to the glass industry.

The aim of the invention is to improve the accuracy of regulation. $

The drawing shows a device for regulating the feeder glass.

The device contains a furnace transformer 1, the lower 2 and the upper pairs | θ

3 electrodes, a current sensor 4 in the lower pair of electrodes, a voltage sensor 5 at the electrodes, a division unit 6 that divides the signal from the voltage sensor 5 into a signal from the sensor 15

4 currents, voltage regulator 7, block

8 controls, a current sensor 9 in the upper pair of electrodes, a subtraction unit 10, a regulator 11, a charge loader 12. 20

The upper electrodes are used as a glass level sensor.

3. The device is performed on standard equipment, K854 current sensors, E855 voltages, P17 and P27 regulators 25, A35 type separation unit, A05 type subtraction unit and thyristor voltage change unit ‘of PH type — 1

The principle of operation of the device is based on the fact that the electrical resistance between the electrodes 3 in the presence of the confining surface of the glass mass on top and the electrodes 2 on the bottom

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Ιίι

2g,

4Ηι

35

where ρ is the resistivity of glass mass, Ohm-m <

n _? - penetration into the glass melt of the electrode, M}

1 - distance between electrodes, m;

g - the radius of the electrode, m ·

B ₁ - distance from electrodes

to the surface of the glass, m

Similarly, the electrical resistance between the electrodes 2 is recorded in the presence of a bounding surface from below (bottom) and electrodes 3 from above:

40

45

50

1n

4b *

rationality ensures that the output signal from the block 10 subtraction was equal to zero.

The device works as follows.

When changing, for example, an increase in the glass melt temperature, the electrical resistance decreases between the electrodes 2 and between the electrodes 3. The signal from the voltage sensor 5 changes, and the signal from the current sensor 4 increases. As a result of dividing the signals from sensors 5 and 4 on the computing unit 6, its output signal becomes less than the set on the controller 7, the latter sends a signal to the block 8, included in the primary circuit of the current source, the voltage on the electrodes 2 and 3 is reduced. electric heating capacity is reduced and the temperature is reduced to the specified value.

When the temperature deviates, not only the electrical resistance between electrodes 2, but also between electrodes 3 changes. However, due to the fact that electrodes 2 and 3 are connected in parallel to the same current source, and current sensors 4 and 9 are switched in opposite, the false response of the regulator 11 will not occur .

When changing, for example, decreasing the temperature, the electrical resistance between the electrodes 3 of the feeder changes, and between the electrodes 2 remains unchanged. Physically, this is due to the fact that the power lines of the current between the electrodes 3 are, as it were, a screen preventing the passage of current from the electrodes 2 to the surface layers of the glass mass. As a result, the current through the electrodes 3 changes (decreases). The signal from the current sensor 9 decreases and becomes less than the signal from the current sensor 4, the error signal appears at the output of unit 10 and the regulator 11 turns on the loader 12 to increase the charge supply to the furnace. As a result, the influx of glass melt into the feeder increases and the level passes to the specified value.

Thus, the proposed device maintains unchanged themes.

perratura on the electrical conductivity of glass mass and glass mass level at

various disturbances in the ragde mode - distance from electrodes

2 to the bottom of the feeder channel, m

Before you start the device by setting the coefficients about 55

1488264

feeder bots by eliminating the effects of fluctuations, temperature, glass composition, electrical disturbances, electrode wear.

Claims (1)

A device for regulating a glass feeder containing two pairs of electrodes installed in height, a voltage sensor on the electrodes and a current sensor in the lower pair of electrodes, a dividing unit, a voltage regulator, a control unit and a furnace transformer, 15 current in the lower pair of electrodes are connected to the inputs of the division unit, the output which is connected to the input of the voltage regulator, the output of which is connected to the input of the control unit to which the primary winding of the furnace transformer is connected, the secondary winding of which is connected to the upper and lower pairs of electrodes, characterized in that in order to improve the control accuracy, a current sensor is inserted into it in the upper pair of electrodes, the subtraction unit and the charge loader controller, the outputs of the current sensors in the upper and lower pairs of electrodes with the inputs of the subtraction unit, the output of which is connected to the boot controller ka charge.