BG98033A - Device for measuring the weight of the electrode in furnaces of smelting under pressure or in vacuum - Google Patents

Abstract

The device is used in electric metallurgy and is designed for electric slag melting furnaces under pressure or under vacuum, or in vacuum arc furnaces. The device consists of a driving cylinder (1), fixed to a sealing flange (2). A brace (4) is mounted to the piston rod (3) of cylinder (1) which in its lower end is connected to an electrode holder. Brace (4) and the electrode holder are engaged by a current conducting tube which is inserted in the narrow tubular part of a bottle shaped vessel (8) turned with its wider part upwards. In the wide part (9) of the bottle-shaped vessel (8) the current-conducting tube, by means of cables and a current conducting ring sealed in the wall of the vessel, is connected to a current source. Between the sealing flange (2) and the upper bottom (14) of the wide part (9) of the bottle-shaped vessel (8) weight sensors (15) are mounted, the piston rod (3) and the brace (4) fitted to it being engaged and gas sealed by means of an articulated compensator (16) fitted and realed by one of its flanged to the sealing flange (2), and by its other flange to the upper bottom (14) of the bottle-shaped vessel (8). Inside the wide part (9) of the bottle-shaped vessel (8), to its lower bottom (17), articulated compensators (18) are fitted and sealed, the pneumatic acting surfaces of which are equal to the pneumatic acting surface of compensator (16). The compensators (16) are fitted to the sealing flange (2) by means of an inner flange (19) and tube (20), and their inner cavities, by holes (22) in the lower bottom (17) of the wide part (9) of the bottle-shaped vessel (8), are connected to the atmosphere.

Description

ELECTRICAL WEIGHT MEASURING DEVICE

IN PRESSURE HEATING OVERS OR IN VACUUM

The invention relates to a device for measuring the weight of an electrode in a pressurized melting furnace or in a vacuum.

An apparatus for measuring the weight of an electrode (1) is known, in which the melt electrode is suspended by means of an electrode carrier and actuating cylinders in a Butyl vessel. Tasnath! a portion of the vessel is sealed in a sealing head attached in turn to the upper end of a container for operation in a controlled atmosphere. In the wide part of the Butyl vessel the movable suspension of the electrode is carried out by means of movable electrical connections and a piston system, so that the forces arising and changing the electrode weight are due to the difference in pressures in the container for controllable operation. outside it are theoretically offset.

A disadvantage of the known device is the presence of Pistons for force compensation, which introduces an indefinitely large error in the measurement of the weight of the electrode, based on the friction between the Piston itself and the cylinder in which it is located.

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It is an object of the invention to provide a device for measuring electrode weight in pressurized melting furnaces or in vacuum whereby the error made in the measurement of the electrode weight by the compensating difference in charges is known and determinable and is not caused by forces of friction.

The task is solved by a device for measuring the weight of the electrode in a pressurized melting furnace or in a vacuum, wherein the actuating cylinder is engaged to a sealing flange. A piston rod is attached to the piston rod of the cylinder, which at its lower end is connected to an electric carrier. The tensioner and the electric carrier are enclosed by a conductor tube, which in turn is inserted into the narrow tube of the BottleWhite vessel, facing upwards wide. In the wide part of the bottle-shaped vessel, the conductive tube is connected by means of cables and sealed into the wall of the bottle-shaped vessel by a conductive ring, which is connected in turn by power lines to a current source. According to the inventions, weight sensors are mounted between the sealing flange and the upper bottom of the wide container of the bottle, with the piston rod and the clamp attached thereto gripped and sealed by a harmonic-shaped expansion joint, sealed and sealed with one flange its flange to the bottom of the Bottle Bottle. Inside the wide part of the bottle-shaped container, harmonically shaped compensators are sealed to its lower bottom, whose pneumatically acting surface is equal to the pneumatically acting surface of the upper compensator. Through the inner flange and the pipe, the compensators are secured to the sealing flange and their inner spaces are connected to the atmosphere by openings at the bottom bottom of the wide part of the Butyl container.

An advantage of the inventions is the lack of compensating pistons, which in turn results in a lack of friction forces throughout the system and reduces the measurement error of the electrode to a certain amount equal to the spring forces arising from the compensating forces due to their load. with pressure.

An exemplary embodiment of the device is shown in the accompanying Figure, which is a longitudinal section of the device.

The device consists of a drive cylinder 1 attached to a sealing flange 2. A piston rod 3 is attached to the piston rod 3 of the cylinder 1, which at its lower end is connected to an electric carrier 5. The tensioner 4 and the electric carrier 5 are enclosed by a conductive tube 6 in turn, it is inserted into the narrow tubular portion 7 of the butyl vessel S, with its wide portion 9 upwards. In the wide part 9 of the Bottle-shaped receptacle 8, the conductive tube 6 is connected by means of cables 10 and sealed into the wall of the receptacle 8 by a conductive ring 11, connected in turn by means of electrically conductive cables 12 to the current source 13 = between the sealing flange 2 and the upper bottom 14 of the wide part 9 of the Bottle receptacle 8 weight sensors 15 are mounted, the piston rod 3 and the gasket 4 attached thereto are gripped and sealed by a harmonic compensator 16, gripped and sealed with one flange to the sealing flange 2 and with the sealing flange 2 and um upper bottom 14 of bottle-court 8. Inside the widest part 9 ·· ·· • · · · • · ·· ·· ····

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The bottle-shaped receptacle 8, to its lower bottom 17, is gripped and sealed by the harmonic-shaped expansion joints 18, whose pneumatically acting surface is equal to the pneumatically acting surface of the compensator 16. Through the inner flange 19 and the tube 20, the expansion joints 18 are sealed, their spaces 21 are connected by openings 22 in the lower bottom 17 of the wide portion 9 of the Butyl vessel 8 to the atmosphere.

The operation of the device is as follows; by driving the skimmer 4 through the cylinder 1, the electrode carrier 5 grips the fusible electrode 23 and presses it against the head of the flow tube 6. The necessary gas pressure is fed into the chamber 24 of the melting furnace. Through the narrow tube part 7 of the Butyl vessel 8, the gas pressure in the wide part 9 of the vessel 8 is equalized with the gas pressure in the chamber 24 = In this way, an axial force equal to its pressure-acting pressure area in the vessel 8 begins to exert on the compensator 16. At the same time, an axial force is created in the opposite direction on the compensators 18, which is equal to the sum of their pneumatically acting pressure areas in the vessel 8. Because the pneumatically acting area of the compensator 16 is equal to the sum of the pneumatic actuators In the case of compensatory payments, 18 and the imposition throughout the court is equal, the two forces are equal. In this way, the weight sensors • 13 record only the actual weight of the fusible electrode 23, without adding or subtracting any friction forces or forces caused by a difference in the pressure inside the chamber 24 and the atmospheric pressure. On the wires 12, the ring 11, the cables 10 and the conduit tube 6, the electrode 23 is heated, the crystallizer 25 current required to melt it. The signal from the weight sensors 15 is processed in the furnace control and used to accurately feed the electrode 23 into the mold 25.

Claims (1)

CLAIMS The electrode in a furnace comprising a drive clamped to a sealing flange, to which a plunger is attached to the piston rod at the lower end of which is suspended electrically, so that the sling and the electric carrier are covered by a current conduit. current court of the court 1. A device for measuring the weight of melting under pressure or in a vacuum cylinder, cylinder, cylinder is attached to the bottom end of which is a carrier, so that the pipe and the electric carrier are covered by a tube inserted into the narrow tubular part of a cylindrical, wide vessel, the upstream portion being the wide portion of the bottle-shaped receptacle, the conductive tube is connected by cables and sealed into the vessel wall by a conductive ring and power lines, characterized in that, between the sealing flange bottom (14) of the wide portion (9) weight sensors (15), with the tightening of the harmonic-shaped tensioner flange attached to the sealing flange bottom (14) of the wide part (9) of the wide part and the sealed surfaces of the sator (16) mechanically connected to the wide part of 4S j (9) of the butyl vessel The piston rod (3) (4) with / 1 A λ f?) (9) of Butyl 1. EP 029821S B 1 Application: 1 figure current. The source of (2) and the upper (S) are mounted on the cylinder (1) and are gas sealed by a sealed one: , and with their other Flange to the Butyl vessel (8), its lower bottom (17) is the sum of the pneumatic actuating surface Flange (19) and pipe (20) Flange (2), and their inner spaces through openings (22 ) in the lower bottom (17) □ the vessel (S) st the atmosphere, and the above but inside the X B5H jT1 ^ 1 acting on the compensation connected