SU287981A1 - DEVICE FOR DETERMINING THE MOMENT OF BEAUTIFUL - Google Patents

Description

At present, an oxygen integrator and a stopwatch are used to stop the metal blowing in the oxygen converter at a given carbon content. However, these devices do not allow the moment the purge stops to be determined with the required accuracy. Recently developed systems using functional (balance) relations between parameters slightly exceed the previously used devices in accuracy even in the case of using relatively high-class primary devices, since functional connections in the converter process are significantly and non-stationary distorted by statistical dependencies. .

The proposed device is characterized in that the melting parameters sensors through potentiometric dividers are connected to a power amplifier and an AC integrator through a divider, the scale of which is graduated in tons of hot melt iron, and the heat loss sensor is connected to a synchronous electric motor simply shaped depending on the duration . This makes it possible to determine and take into account the amount of heat lost by the converter over time simply. In addition, to take into account the experience of previous heats, the mechanism for changing the initial position of the arrow is made in the form of a movable base, on which a meter of metal decarburization is installed.

The drawing is a schematic diagram of the device.

Unit 1 for accounting of statistical coefficients contains ferrodynamic converters / 7F1-DF12, variable resistances Ri-R-is, and a repeater of electrical signals

current PES; power amplification unit 2 - the YF1z, PFi ferrodynamic converters, electric motor Dv-1, capacitance Ci, € 2, indicating the arrow and submarine pattern; unit 3 switching the type of work - relay P1; unit 4, taking into account the weight of cast iron - variable resistance Rii, unit 5 periodization - ferrodynamic converter JF15, electric motor Dv-2 and contact of relay IPl; Amplitude to frequency conversion unit 6 - lamps, .772,

resistance, capacitors C3, C, relay contact 1P2; impulse dividing unit 7 — PP triodes, Co capacitors, resistances; carbon indication unit 8 — pulse frequency meter indicating the arrow with

scale and mechanism Ki change the initial position of the pointer, block 9 accounting for heat losses - electric motor Dv-3, gearbox P, electromagnetic EM coupling with thermal pattern and loss of submarine, relay contacts

Signals from ferrodynamic transducers measuring, respectively, the flow and pressure of oxygen, the position of the tuyere H, the temperature of the exhaust gases — G and the amount of heat lost with water cooling the caisson obtained by multiplying the temperature difference at the entrance and exit of the caisson T to the water flow GB, come from ferrodynamic converters JF2 - / 7F6, respectively, on the resistance of the Ri-R block /. The weight of the ore Gp, lime GH, scrap Gl and spar Gmn for smelting is manually entered using PF1-YaFu ferrodynamic converters built into the computing device. The amount of heat lost by the converter over time is simply automatically determined in block 9 as a function of time simply. The block submarine block is mechanically connected to the frame of the ferrodynamic converter JFC. The piece is set in motion by the synchronous motor Dv-3 through the gearbox P and the EM coupling.

The Dv-3 electric motor is switched on at the beginning by the IPS contact and simply turns the submarine piece by an angle that is simply proportional to the duration. At the beginning of the purge of the next heat, the motor Dv-3 stops due to the opening of the 1RZ contact and the voltage Lnp / (tnp) is introduced into the unit with the help of the ferrodynamic converter JFc during the entire purge. At the moment when the purge stops, the 1P4 contact closes, and the capacitor C3, which is energized during the purge through the resistance Rii to a voltage of 250 V, is discharged through the coil of the EM clutch. Due to this, the Dv-3 electric motor is mechanically disconnected with the PL template, which is brought back to the initial state by the action of the return spring.

By means of resistances, the magnitude of the signals from the ferromagnetic converters JF2-JF and potentiometrically multiplied by the coefficients of the equation, taking into account the degree of influence of the listed parameters on the decarburization rate.

The algebraic sum of the signals is fed to the input of block 2. The voltage at the output of block 2 is brought into correspondence with the weight of the iron to be melted by means of variable resistance Rii, provided with a piece of weight of the iron. The voltage received is input

unit 6, in which this voltage is continuously compared with the voltage coming from the frame of the ferromagnetic YF15 converter, cyclically rotated from the zero position to the maximum position and back. The number of pulses in each cycle is proportional to the amplitude of the voltage coming from block 4. The pulses from the output of the amplitude-frequency converter go to block 7, decrease by four times and are taken into account by the counter Cq.

Thus, blocks 5, 6, and 7, as well as the MF counter, are performed in the device as an integrator. A pointing arrow connected to the output shaft of the meter shows the current carbon content on a non-linear scale.

The mechanism / is used to take into account uncontrolled, slowly varying from melting to melting parameters (the change in the initial position of the pointing arrow, which is set depending on the errors in previous melts.

Subject invention

Claims (3)

1. Device for determining the moment of cessation of purging in an oxygen converter at a given carbon content in a metal, containing sensors for input and output process parameters, a power amplifier and a decarburization degree counter with a pointing arrow, characterized in that the melting parameters sensors are connected to an amplifier through potentiometric dividers power and integrator AC through the divider, the scale of which is graded in tons of iron smelting. 2. The device according to claim 1, characterized in that, in order to determine and take into account the amount of heat lost by the converter during the time, the heat loss sensor is connected to the synchronous motor through a piece, which is shaped depending on the duration. 3. The device according to paragraphs. 1 and 2, characterized in that, in order to take into account the experience of previous heats, the mechanism for changing the initial position of the arrow is designed as a movable base on which a metal decarburization counter is installed.