SU1065355A1 - Device for controlling level of glass melt - Google Patents

Abstract

A DEVICE FOR REGULATING THE LEVEL OF A GLASS BOTTOM, containing a sensor with an electrode inserted into a tube partially immersed in the glass melt and connected to the pneumatic mass. MO pulsator, which is connected to one time relay output, the input of which is connected to a level sensor, and a controller, the output of which is connected to the charge loader, that is, o / in order to increase the control accuracy, A pneumatic pressure sensor and a memory element are inserted into it / and the pressure sensor input is connected to a tube, the pressure sensor output to one input of the memory element, the stroke of which is connected to the regulator input, and another time relay output to the other input element memory (/)

Description

The invention relates to the glass industry and can be used to control the level of electrically conductive liquids and melts.

A device for regulating the level of a glass melt is known, which contains a level sensor with an electrode located above the surface of the glass mass and a control unit for the drive of the plR loader. .

The drawback of the device is low reliability and accuracy associated with a long contact time of the electrodes with the melt and the glass melt deposited on it, because after the loader disconnects, due to a delay in the control system, the glass melt level continues to grow for a while and the electrode is wetted by the melt.

Closest to the proposed technical essence is a device for regulating the level of glass melt, which contains a level sensor with an electrode; placed in a tube partially immersed in a glass Maqcy And connected to a pneumatic pulsator, which is connected to one time relay output, the input of which is connected to a level sensor, and a controller, the output of which is connected to the charge loader 2.

Kedosgatkom of the known device is low accuracy of regulation, since the device operates according to the scheme of positional regulation and cannot provide high accuracy; level, especially with significant variations in furnace performance.

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

This goal is achieved in that the device for adjusting the level of the glass melt contains a sensor. level with electrode, placed in a tube, partially immersed in glass melt and connected to a pneumatic pulsator, which is connected to one time relay output, whose input is connected to a level sensor and regulator, whose output is connected to the charge loader, a pneumatic pressure sensor is inserted a memory element, the pressure sensor input is connected to a tube, the pressure sensor output is connected to one memory input, the output of which is connected to the regulator input; and another time relay output is connected to another memory element input. .

in fig. 1 and 2 shows the electrical connection diagram of the relay.

The device includes a tube 1, partially immersed in glass-mass: su, electrode 2, placed inside

pipes, a pneumatic pulsator consisting of an air source 3, an electropneumatic valve 4 connecting a tube to an air source, and a throttle 5 connecting a pipe to the atmosphere, a pneumatic b-pressure sensor, a pneumatic inlet of which is connected to the tube, a level sensor made in the form of an electronic relay 7 connected to an electrode, a time relay 8, a memory element 9, a regulator 10, a charge loader 11 closing the first 12 and second 13 contacts of the electronic relay and the first 14 and second 15 contacts of the relay 8 time.

The device works as follows.

When the electrode touches the glass 1, the switch-on circuit of the electronic relay 7 closes, which, with its first closing contact 12, starts the time relay 8. At the same time, contacts 13 connected in series with contacts 15 of the time relay are energized to turn on memory element 9, on which the output signal from pressure sensor b is proportional to the hydrostatic pressure at the electrode’s immersion depth in pipe 2, and therefore proportional to the free mass. In the oven. After a predetermined time delay required and the signal is memorized from sensor b on memory element 9, time relay contacts 8 are activated: contacts 15 open and contacts 14 close. Memory element 9 is turned off and. ; the signal from its output to the regulator 10 remains unchanged during the entire measurement cycle, despite the pressure change in the pipe when air is supplied to it.

The signal from the second time relay output (pin 14 of the electropneumatic valve 4 opens and the air from source 3 enters pipe 2, the pressure in it increases and the glass mass moves down through the pipe, breaking contact | With electrode. As a result, electronic relay 7 de-energizes the signal from the input of the time relay 8 is removed -., it is, its contacts return to the initial state and the electropneumatic valve 4 is closed. The air from the pipe 2 through the throttle 5 is vented to the atmosphere, the pressure drops and the glass mass rises up through the pipe. t touching electrode glass mass triggered electronic relay 7, and on the element 9, the memory stored current values of the pressure sensor used signalas proportional level steklomasry

If the pressure signal recorded on the memory element 9 at the time of contact of the glass mass with the electrode is less than the specified value, which indicates a decrease in the glass mass in the furnace, the regulating device 10 will command an increase in the flow rate of the CAL 1 by the loader 11. As the glass mass rises above the specified value the control device, on a signal from the frame unit, will give a command to reduce the feed rate of the charge by the loader. The proposed level control device provides, thanks to continuous regulation, maintain a higher accuracy level (especially on large furnaces having large lag time) at a high reliability in operation due to the absence .nyh movable mechanical parts in contact with aggressive melt.

The introduction of the proposed device will, due to the high stability of the glass mass level, improve the quality of the glass mass and increase the yield of usable products.

Claims (1)

A device for regulating the level of the glass mass, containing a level sensor * with an electrode placed in a tube, partially immersed in molten glass and connected to a pneumatic. a pulsator, which is connected to one output of a time switch, the input of which is connected to a level sensor, and a regulator, the output of which is connected to the charge loader, which requires that, in order to increase the accuracy of regulation, a pneumatic pressure sensor is introduced into it and a memory element, wherein the pressure sensor input is connected to the tube, the pressure sensor output with one input of the memory element, the output of which is connected to the input of the controller, and the other output of the time relay with the other input of the memory element. a sl with 1СЛ СП 1Q65355