SU1252304A1 - Device for controlling temperature conditions of glass melt feeder - Google Patents

Description

The invention relates to the glass industry and is intended to regulate the temperature regime of glass feeders, production channels, chambers, etc.

The purpose of the invention is to improve the accuracy of regulation.

Fig. 1 shows a device for controlling the temperature regime of a glass melt feeder; Fig. 2 shows an example of the implementation of a phase-sensitive unit.

The device contains the first electrodes 1 installed at the bottom of the feeder, the second electrodes 2 installed in the upper layers of the glass mass, the heating elements 3 in B1 of the burners installed with the left and right feeder strut, the actuator 4, the temperature controller 5, for sensor 6, temperature sensor 7, voltage regulator 8, furnace transformer 9, the middle point of the secondary (low-voltage) winding of which is connected to electrodes 2, the first 10 and second 11 current sensors, phase-sensing unit 12, one of the inputs of which is connected to way out a second current sensor, another input with a transformer secondary winding, and an output with an additional temperature regulator 13, to the output of which an additional fuel supply actuator 14 is mounted on the fuel line to the mount of one of the feeder sides, for example, on the right side (Fig. 1 ).

The phase-sensitive unit is an amplifier and contains transistors 15 and 16, transformers 17 and 18, resistors 19 and 20, and a source 21 of the collector voltage (E). Input signal voltage Ir - signal from current sensor 11, voltage reference And signal from transformer 9, And - output signal of direct current applied to additional regulator 13.

The device works as follows.

I

Using temperature sensor 7

the surface temperature of the glass melt is measured and when it deviates from the value specified on the setting device 6, the controller 5 acts on the actuator 4 by changing the fuel supply to the left and right burners

feeder sides to restore the required glass melt temperature.

(Bottom and wall layers of glass melt are heated by passing current between electrodes 1 and between electrodes 1 and 2 on each side of the feeder. If the temperature and, consequently, the electrical resistance of the glass mass on the left and right sides of the feeder, the equalizing current through the circuit connecting the electrodes 2 with the midpoint of the secondary winding of the transformer 9 are absent. When the temperature deviation in the bottom and near-wall layers of the glass melt deviates from the given one, the electrical resistance of the glass melt and current Between the electrodes. According to the signal from the current sensor 10, the regulator 8 changes the voltage on the electrodes 1 in such a way that the electrical resistance of the glass mass and, consequently, its temperature, take the same values.

If the temperature uniformity on the sides of the glass melt is disturbed, for example, the temperature at the right side of the feeder decreases, the electrical resistance between electrodes 1 and 2 (increases at the right side of the feeder). As a result, a balancing current flows in the line connecting the electrodes 2 to the midpoint of the secondary winding of the transformer, the phase of which coincides with the phase of the current through the electrodes. In the absence of an input signal from the current sensor 11, the output voltage is - "xu. If the phase of the voltage from current sensor 11 coincides with the phase of voltage from transformer 9, then a positive current flows across the resistances and h of the load. If the phases of the voltage from sensor 11 and transformer 9 are opposite, the load current is negative. The output voltage of the phase-sensitive unit is proportional to the input voltage and the deviation of its phase from the phase of the reference voltage. The load resistance and r, are chosen so large that the output signal from the block is in the range of 0-2.5 V.

At the output of the phage-sensitive unit 12, a positive polarity voltage appears and the regulator 13, acting on the actuator 14, increases the supply of fuel to the burners on the right side of the feeder to heat the temperature on the sides.

When the temperature of the glass mass at the right side of the feeder increases, the surge current is opposite to the phase of the supply current, a negative polarity voltage appears at the output of the phase sensitive unit and the regulator acts on actuator 1A to reduce the temperature at the right side of the feeder.

Elimination of temperature gradients in depth and flow of glass mass will provide an increase in the yield of finished products at 3-AZ.B. As a basic object, a glass mass feeder of the PMG-311 type with electric glass mass heating by side horizontal electrodes is used.

The proposed device will improve the accuracy of regulation.

1

Compiled by A. Kuznetsov Editor I. Derbak Tehred A. Kravchuk Correction I. Musk

Order 4585/25 Circulation 457 Subscription

VNIPPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

FIG. 2

Claims (1)

DEVICE FOR REGULATING THE TEMPERATURE MODE OF THE STEKLOMASS FEEDER, containing a sensor and a temperature regulator connected to the corresponding inputs of the temperature regulator, the output of which is connected to the executive fuel supply mechanism, two pairs of electrodes installed at the bottom and top of the glass feeder, two current sensors, a voltage regulator and an oven transformer the low-voltage winding of which is connected to the lower pair of electrodes, the high-voltage winding of the furnace transformer through the voltage regulator is connected to the power source, one current sensor is included in the power circuit of the lower pair of electrodes and connected to the input of the voltage regulator, characterized in that, in order to increase the accuracy of regulation, a phase-sensitive block, an additional temperature regulator and an additional actuator for supplying fuel are introduced into it, the upper a pair of electrodes is combined and connected through a different current sensor to the midpoint of the low-voltage winding of the furnace transformer, the outputs of another current sensor are connected to a phase-sensitive unit, the other inputs of which are connected to the low-voltage winding of the furnace transformer, and the output of the phase-sensitive unit through an additional temperature controller is connected to an additional actuator for supplying fuel. SU „„ 1252304