RU2048529C1 - Apparatus to determine average speed of blast furnace burden slip - Google Patents

Abstract

FIELD: ferrous metallurgy, for processes of blast furnace heat with action on parameters of blasting and coke. SUBSTANCE: trustworthiness and accuracy of control is exercised by combining of information from each sonde winch, that is in operational state of measurement. The information is coming to united device, that determines average speed of burden slip. Device for determination of blast furnace burden slip average speed has prod, that is moving along axis of blast furnace with the help of drive and its control circuit, that are combined by interblocks connections with turning angle sensor, averaging device with generator of time cycle of averaging, converter, register and control block. Circuit of sonde winch slip speed control is additionally provided with scaling units according to number of control prods, second averaging device and second converter with new interblocks connections. EFFECT: improvement of blast furnace operational features. 5 dwg

Description

 The invention relates to the field of metallurgy, relates to controlling the speed of the charge on the blast furnace and is intended, in particular, for conducting blast furnace smelting under conditions affecting the parameters of the blast and coke consumption.

 Known probe winch [1] widely used practically for measuring the level of charge in a blast furnace. The probe winch contains a cable in the lower part in the form of chains with a cylindrical load at the end passing through special guide tubes into the furnace. In the upper part, the cable is wound on a drum with a drive moving the load along the axis of the furnace. The output shaft of the drum is coupled to a rotation angle sensor associated with a recording device.

 The disadvantage of this device is that it is difficult to control the rate of operation of the furnace, for example, by changing the rate of convergence of the charge materials in the furnace.

 A known device for controlling the rate of charge descent [2] based on the level meter of the charge charge using the probe winch of a blast furnace. The device comprises a rotation angle sensor, for example selsyn, articulated with the winch measuring drum shaft, an averager with an averaging time adjuster, for example, a time relay. The averager is connected to the converter, the output of which is connected to the recording device using the control unit.

 A disadvantage of the known devices is the following. Using the elements of the well-known probe winch, it is practically possible to switch from an analog signal of a change in the angle of rotation of the sensor to the formation of a physical quantity in the form of a change in the rate of charge descent only as a result of its additional direct measurement in the conditions of an existing blast furnace. This can lead to loss of reliability and errors of control of the rate of descent of the charge, which is undesirable. In addition, this is also facilitated by the fact that the use of information when maintaining a furnace with only one probe winch without a corresponding averaging of the charge descent rate obtained by measuring each winch on the furnace also leads to the loss of its reliability and control accuracy. So, in conditions of uneven lowering of the charge in one of the sectors around the circumference of the furnace, which often occurs during operation of the furnace, the average speed of the charge can be generally unchanged.

 The aim of the invention is to improve the technical and economic indicators of the blast furnace by ensuring the reliability and accuracy of control of the rate of descent of the charge.

 This goal is achieved in that the device for determining the average rate of descent of the charge in the blast furnace, containing a control unit and a measuring channel, consisting of a probe with a drive for its use parallel to the vertical axis of the furnace, the output shaft of which is connected to a rotation angle sensor, the first averaging unit with a cycle master averaging time, connected through a first converter to a recorder, is additionally equipped with several measuring channels, a second averaging unit and a second converter, and in each the first measuring channel, a scaling unit is introduced, the first input of which is connected to the rotation angle sensor, and the output with the second input of the first averaging unit, the second, third and fourth inputs of the scaling unit of each measuring channel, as well as the fourth and third inputs of the first averaging unit control, the output of the first averaging unit of each measuring channel, as well as the output of the control unit are connected to the inputs of the second averaging unit, the output of which through the second converter is connected to registrar.

 Comparative analysis with the prototype shows that the proposed device is characterized by the presence of additional new elements: the number of probe winches with scaling units, the second averaging device and the second converter, as well as new interblock communications.

 Thus, the claimed device meets the criteria of the invention of "novelty."

 These new blocks were not identified in similar technical solutions when studying this and related fields of technology, but since they do not have an independent nature, the lack of universality can only be used as part of the proposed device. In contrast to the prototype, in the claimed device using additional blocks, the process of combining information obtained on the blast furnace from each probe winch in the control position takes place.

 All this allows us to conclude that the technical solution of the proposed device meets the criteria of the invention "inventive step".

 In FIG. 1 shows the probe winch of a blast furnace, its general view with a block diagram of the control of the rate of charge descent according to the number n of control probes.

 The drawing shows 1 charge loaded on the top of the blast furnace; 2 large cone of the furnace loading apparatus; 3 probe probe winch; 4 drive the movement of the control probe. The block diagram of the control of the rate of descent of the charge consists of angle sensors 5, scaling units 6, first averaging devices 7 with averaging time cycle adjusters 8, first converters 9, recording device 10, second averaging device 11, second converter 12 and control unit 13.

 In FIG. 2 shows a block diagram of a scaling unit; in FIG. 3 is a block diagram of a first averaging device; in FIG. 4 is a block diagram of a second averaging device; in FIG. 5 is a block diagram of a control unit.

 The probe winch (Fig. 1) contains for each control probe a probe 3 located on the charge 1 of the top of the blast furnace with the lowered position of the large cone 2 of the filling apparatus and at the highest point before lowering the large cone 2. At the top of the probe 3 is connected to the cable, wound on a measuring drum, the shaft of which is connected to an electric motor (not shown) of the actuator 4 for moving the probe 3 along the axis of the furnace. The measuring drum of the winch is kinematically connected to the angle sensor 5 according to the number n of probe winches, the outputs of which are connected to the first information inputs of the scaling units 6. The outputs of the scaling units 6 are connected to the second information inputs of the first averaging devices 7, the first information inputs of which are connected to the outputs of the adjusters 8 averaging cycle. The second and third control inputs of the scaling units 6 are connected respectively to the first and third outputs of the control unit 13. The outputs of the first averaging devices 7 are connected to the information inputs of the first converters 9 and the first information inputs of the second averaging device connected to the second information input with the second output of the control unit 13, and the output with the information input of the second converter 12. The third information inputs of the first 7 and second 11 averaging devices are connected to the fifth output of the unit and a control 13. The first and second data inputs recorder 10 connected to the outputs of respectively the first 9 and second 12 converters. The first, second and third control inputs of the control unit 13 are connected to the control circuit of the probe winches, and the fourth output to the fourth control inputs of the scaling units 6, the first 7 and second 11 averaging devices. As a sensor of the rotation angle 5 of the flowchart for controlling the rate of descent of the charge of the probe winch (Fig. 1), for example, a standard-design PDF-3 sensor is used. The scaling unit 6 (Fig. 2) contains a galvanic isolation element 14, a Schmidt trigger 15, an And 16 element, a division element 17, an inverter 18, an AND-NOT element 19, a counter 20, a register 21, and a control signal driver 22.

 As element 14 is used, for example, the microcircuit K 293LPP; trigger 15 chip K 155TL1; element 16 chip K 155LI1; element 17 of the chip K 155IE2 and K 155 LA2; inverter 18 chip K 155 LN1; element 19 chip K 155 LA3; counter 20 chip K 155IE5; register 21 chip K 155IR13; shaper 22 chip K 155AG3.

 The first information input of the scaling unit 6 is connected to the information input of the galvanic isolation element 14, the output is connected to the information input of the Schmidt trigger 15, the output of which is connected to the first information input of the element And 16. The second control input of the block 6 is connected to the second control input of the element And 16, the output connected to the first information input of the division element 17. The third control input of block 6 is connected to the second control input of the counter 20 and the control input of the inverter 18, the output connected to the second control input of the AND-NOT element 19, the output of which is connected to the second control input of the division element 17, the output associated with the first control input of the And element NOT 19 and the first information input of the counter 20, the output of which is connected to the first information input of the register 21. The fourth control input of block 6 is connected to the input of the driver 22, the output associated with the second control the register 21, the output of the unit connected to the output 6. The first averaging device 7 (Fig. 3) consists of the first registers 21 in the amount of forty pieces, the first drivers 22 of the control signal in the amount of forty pieces, the second and third registers 21, second, third, the fourth and fifth shapers 22, two inverters 18, counter 20, multiplexer 23, adder 24, trigger 25, pulse generator 26, memory cell 27, comparison element 28 and multiplier 29. As a multiplexer 23, for example, chip K 155KP1; adder 24 chip K 155IM3; flip-flop 25 chip K 155TM2; generator 26 chip K 155LA3; memory cell 27 chip K 556RT5; element 28 comparison chip K 155SP1; multiplier 29 chip KR 1802BP3. The first information input of the first averaging device 7 is connected to the first information input of one of the first forty registers 21, an output connected to the first information input of the multiplexer 23 and sequentially to the first information input of the next of the forty first registers 21, outputs connected respectively to the second, third, etc. d. the fortieth input of the multiplexer 23. The third control input of the first averaging device 7 is connected to the third control inputs of each of the forty first registers 21. Fourth the first control input of the first averaging device 7 is connected to the input of the last of the first forty formers 22, the outputs of which are connected in series with the inputs of each of the remaining formers 22 and the second control input of the corresponding from the first register 21, and the second output of the last of the forty formers 22 with the first control input trigger 25. The second information input of the first averaging device 7 is connected to the first information input of the memory cell 27 and the second information input of the comparison element 28, the output ohms associated with the input of the first inverter 18 and the second control input of the trigger 25, and the second control input of the cell 27 of the memory is connected to a logical "0". The first output of the trigger 25 is connected to the input of the pulse generator 26, the output connected to the input of the second driver 22 and the first information input of the counter 20, the second control input of which is connected to the output of the first inverter 18, and the output is from the forty-second information input of the multiplexer 23 and the first information input of the element 28 comparisons. The second inverse trigger output 25 is connected to the forty-first control input of the multiplexer 23 and the input of the third driver 22, the output connected to the second control input of the third register 21 and the input of the fourth driver 22, the output of which is connected to the third control input of the second register 21 and the input of the fifth driver 22. The output of the multiplexer 23 is connected to the information input of the second inverter 18, the output associated with the first information input of the adder 24, the output connected to the first information input the third register 21 and the first information input of the second register 21, which is connected by the second control input to the output of the second driver 22, and by the output to the second information input of the adder 24. The output of the third register 21 is connected to the first information input of the multiplier 29, connected to the third and fourth control inputs with the output of the fifth driver 22, the second information input with the output of the memory cell 27, the fifth control input with a logical "1", and the output with the output of the first averaging device 7.

 As a setpoint for the averaging time cycle 8, for example, a switch of type PP-10 MV is used, as converters 9 and 12, for example, a digital-to-analog converter as part of the Remicont R-110 control microprocessor controller and as a recording device 10, for example, a device measuring and recording type A682-002-2-01 with the number of measurement channels twelve.

 The second averaging device 11 (Fig. 4) contains a register 21, a shaper 22, an adder 24, a multiplier 29, and a time relay 30. As a time relay 30, for example, a microcircuit K 1006VI1 is used. The first information inputs of the second averaging device 11 by the number of control probes are connected to the information inputs of the adder 24, the output connected to the second information input of the multiplier 29, the first information input of which is connected to the second information input of the second averaging device 11, the fifth control input with logical "1", and the output with the first information input of the register 21. The fourth control input of the second averaging device 11 is connected to the input of the time relay 30, the output associated with the third, fourth control the input inputs of the multiplier 29 and the input of the shaper 22, the output of which is connected to the second control input of the register 21. The third control input of the second device 11 is connected to the third control input of the register 21, the output of which is connected to the output of the second averaging device 11.

 The control unit 13 (Fig. 5) contains, according to the number of control probes, the And 16 elements and the first I-NOT 19 elements, as well as from the second to the fifth I-NOT 19 element, two inverters 18, three control signal shapers 22, two triggers 25, a memory cell 27, an OR element 31, a timer 32, and two control buttons “SA1” and “SA2”. As an OR 31 element, for example, a K 155LA1 chip is used, and a timer 32, for example, an N-1 resonator, 1 MHz and K 155LA3, IE1, IE4, IE5, LN1 and K 555LI6 microcircuits. The first inputs of the control unit 13 according to the number of control probes are connected to the control inputs of the first elements AND 19, outputs associated with the information inputs of the memory 27 and the first control inputs of the corresponding first elements And 16, the outputs of which are connected to the corresponding first outputs of block 13. The second control the input of the memory cell 27 is connected to a logical "0", and the output to the second output of the control unit 13. The second control input of block 13 is connected to the input of the second AND-NOT 19 element, the output connected to the input of the first driver 22, the first output of which is connected to the second control input of the first trigger 25, and the second output to the first control input of the OR element 31 and the third control input of the timer 32. The third control input of block 13 is connected to the input of the third AND-NOT element 19, the output connected to the input of the second driver 22, the second output of which is connected to the second control input of the OR element 31, and the first output to the first the control input of the first trigger 25, the output associated with the first control input of the timer 32. The connection to the body of the block 13 is connected to the first contacts of the control buttons "A1" and "A2", the second contacts of which are respectively connected to the inputs of the fifth and fourth AND-NOT elements 19. The output of the fourth AND-NOT element 19 is connected to the input of the first inverter 18, the output connected to the first control input of the second trigger 25, and the output of the fifth AND-NOT element 19 with the fifth output of block 13, the third control input of the OR element 31 and the input of the second inverter a torus 18, the output of the second trigger 25 connected to the second control input, the output of which is connected to the second control input of the timer 32. The first output of the timer 32 is connected to the fourth output of block 13 and the input of the third driver 22, the output connected to the fourth control input of the OR element 31, the output which is connected to the third output of block 13 and the fourth control input of timer 32, the second output associated with the second control inputs of the first elements And 16.

 The probe winch of the blast furnace (Fig. 1) in the automatic mode of measuring the rate of descent of the charge works as follows.

, (1) где k коэффициент пропорциональности, равный отношению количества импульсов mo на один оборот датчика 5 угла поворота к длине сбега L_oканата измерительного барабана на его один оборот
k

. (2)
В соответствии с технической характеристикой зондовой лебедки, выпускаемой Миллеровским заводом металлургического оборудования длина сбега каната измерительного барабана на один оборот L_o 35 мм. Согласно технического паспорта на датчик ПДФ-3: число выходных импульсов на один оборот вала датчика равен 600 имп.In the process of discrete receipt of the charge 1 in the furnace in order to avoid damage to the probe 3 of the control probes, before lowering the large cone 2 of the loading device, the probe 3 is raised to its highest position. After raising the large cone 2, the probe 3 of the control probes is lowered onto the charge 1. At the same time, the electric drive motor 4 of the probe winch is in the operating mode, in which the cable fixed in the upper part of the probe 3 occupies a tense position. This is due to the fact that the torque of the electric motor is not able to overcome the moment of the measuring drum from the gravity of the probe 3. Subsequently, lowering the charge 1 in the furnace causes the probe 3 to move the control probes and rotate the measuring drum of each probe winch in operation. The rotation of the measuring drum of the drive of skip winches is accompanied by a change in the angle of rotation of the kinematically connected sensor 5 of the scheme for measuring the rate of descent of the charge of the blast furnace. The inclusion of the scheme for measuring the rate of descent of the charge in the work is carried out using the control buttons "SA1" and "SA2" of the control unit 13 (Fig. 5). By the command "Reset" from the control button "SA1", the control unit 13 for the third and fifth output starts to generate a control signal that is supplied to the third control inputs of the scaling units 6, the first 7 and second 11 averaging devices, setting them to their initial state. And by the “Start” command from the control button “SA2”, a permission for the operation of the timer 32 of the control unit 13 is provided. Further operation of the timer 32 depends on the state of the inputs of the control unit 13 associated with the probe winch control circuit. When lowering the probe 3 of the control probes onto the furnace charge 1, the command from the control circuit of the probe winches in the following direction is sent to the third control input of the control unit 13: “probes in the furnace”. At the same time, the logical “0” is fixed at the first control inputs of block 13 if the control probe corresponding to the input is in the operational state of measurement and logical “1” when the corresponding control probe is excluded from the measurement mode. The “Probes in the furnace” command starts the timer 32 of block 13, which counts the delay time necessary to exclude transient processes from the measurement cycle caused by lowering the probes into the furnace. After this time delay, in accordance with the logical state of the first control inputs of block 13, logical “1” or “0” is set at its first outputs. In this case, the logical "1" is fixed on the second control inputs of the scaling units 6, thereby providing a resolution to the process of measuring the rate of descent of the charge of the probe winch, the control probe of which is in working condition. In the scaling blocks 6, the pulses generated by the rotation angle sensors 5 and fed to the first information inputs of the blocks 6 are processed. The number of these pulses m is proportional to the run L of the measuring drum of the probe winch and, therefore, proportional to the height H of lowering the charge 1 of the blast furnace
H

, (1) where k is the proportionality coefficient equal to the ratio of the number of pulses mo per revolution of the sensor 5 of the rotation angle to the run length L _{o of the} measuring drum rope per revolution
k

. (2)
In accordance with the technical characteristics of the probe winch manufactured by the Millerovsky Metallurgical Equipment Plant, the run length of the measuring drum rope is one revolution L _o 35 mm. According to the technical passport for the PDF-3 sensor: the number of output pulses per revolution of the sensor shaft is 600 imp.

 According to formula (2), the proportionality coefficient k 17 pulses / mm and taking into account formula (1), the output counter of the scaling units 6 will record the change in the lowering height of the charge 1 in the blast furnace by the number of pulses arriving at the first information inputs of the units 6, based on the condition : 1 impulse 1 mm.

 Simultaneously with the formation of control signals allowing the operation of the scaling units 6, in the future, the timer 32 of the control unit 13 is restarted, followed by the first minute of the measurement cycle. At the end of the first minute, the block 13 at the third and fourth output generates short control pulses arriving, respectively, at the third inputs of the scaling units 6, and at the fourth inputs of the blocks 6, as well as the first 7 and second 11 averaging devices. In scaling units 6, at the fourth input, a positive pulse of the control signal generates a short pulse of information recording from the output counter to the output register, and then a short control pulse from the control unit 13 passes through the third input, setting the output counter of blocks 6 to the initial state. Thus, the outputs of blocks 6 sets the number of processed pulses recorded during the first minute after turning on the control unit 13 in operation. Those. taking into account formulas (1) and (2) at k 17 pulses / mm, we have the physical value of the charge transfer in the blast furnace for a minute or the minute charge speed, V mm / min. From the output of the scaling units 6, information about the minute charge convergence rate in the form of a code of numbers Nvi is fed to the second information inputs of the corresponding first averaging devices 7, where, with the arrival of a short control pulse to the fourth input, the information is rewritten into input shift registers. After each subsequent minute that the probe 3 of the control probes is located on the furnace charge 1, when it is lowered, the control unit 13 generates the control pulses described above, new information Nvi is established at the outputs of the scaling units 6, which is overwritten in the input shift registers of the first averaging devices 7.

N $\genfrac{}{}{0ex}{}{\text{i}}{\text{v}}$ мм/мин, (3)
Результат вычисления по формуле (3) в виде кода чисел N_v ^Iсрiпоступает на информационные входы соответствующих первых преобразователей 9 и на первые информационные входы второго устройства 11 усреднения. В дальнейшем на втором информационном входе второго устройства 11 усреднения фиксируется информация в виде кода числа N_n о количестве n, находящихся в режиме измерения зондовых лебедок и поступающая с второго выхода блока 13 управления. При этом с приходом короткого импульса управления с четвертого выхода блока 13 на четвертый управляющий вход второго устройства 11 усреднения в последнем происходит процесс вычисления средней скорости схода шихты с учетом количества n зондовых лебедок, находящихся в режиме измерения:
N $\genfrac{}{}{0ex}{}{\text{I}}{\text{v}}$ ^Iср= 1/N_n

N $\genfrac{}{}{0ex}{}{\text{I}}{\text{v}}$ ^срi, мм/мин, (4) с последующей записью числа в коде N_v ^IIср в выходном регистре второго устройства 11 усреднения. Вычисленное среднее значение скорости схода шихты по формуле 4 с выхода второго устройства 11 усреднения в виде кода чисел N_v ^IIср поступает на информационный вход второго преобразователя 12.When loading another portion of the charge 1 into the furnace, before lowering the large cone 2 of the loading device, the probe 3 of the probe winches is raised. From the control circuit of the probe winches the command "Raise probes" is received, a logical "0" is set at the second control input of the control unit 13. Block 13 on the third output generates a short control pulse, which translates the scaling units 6 with the logical “0” at their second inputs being set to the initial position with the measurement process disabled. During the time of raising the probes, when the probe 3 does not touch the surface of the charge 1, previously recorded information is stored in the output register of the scaling units 6. After further raising the large cone 2 and lowering the probe 3 of the control probes onto the charge 1, the process of measuring the rate of descent of the charge is resumed and there is a further rewriting of the newly received information N _v ⁱ in the input shift registers of the first averaging devices 7. The maximum number of these registers is forty pieces and is accepted as a result of industrial testing of the device on operating furnaces of various usable volumes under NLMK conditions. At the moment of reaching the actual number of minute measurements of the rate of descent of the charge and the given k using the adjusters 8 of the averaging time cycle, the output of which in the form of a code of numbers N _k ^{i is} supplied to the first information inputs of the first averaging devices 7, in the latter the average speed of descent of the charge will be calculated during measurement period k for the ith probe winch:
N $\genfrac{}{}{0ex}{}{\text{I}}{\text{v}}$ ^cpi = 1 / N $\genfrac{}{}{0ex}{}{\text{i}}{\text{k}}$

N $\genfrac{}{}{0ex}{}{\text{i}}{\text{v}}$ mm / min, (3)
The result of the calculation by formula (3) in the form of a code of numbers N _v ^Iсpi goes to the information inputs of the corresponding first converters 9 and to the first information inputs of the second averaging device 11. Subsequently, at the second information input of the second averaging device 11, information is recorded in the form of a code of the number N _n about the number n that are in the measurement mode of the probe winches and coming from the second output of the control unit 13. In this case, with the arrival of a short control pulse from the fourth output of block 13 to the fourth control input of the second averaging device 11, the process of calculating the average rate of charge descent takes into account the number n of probe winches in measurement mode:
N $\genfrac{}{}{0ex}{}{\text{I}}{\text{v}}$ ^Iav = 1 / N _n

N $\genfrac{}{}{0ex}{}{\text{I}}{\text{v}}$ ^sr , mm / min, (4) followed by writing the number in the code N _v ^{II sr} in the output register of the second averaging device 11. The calculated average value of the rate of descent of the mixture according to formula 4 from the output of the second averaging device 11 in the form of a code of numbers N _v ^{IIav is} supplied to the information input of the second converter 12.

Thus, with a discreteness of one minute, the information on the average values of the charge ^convergence rate in the form of a code of numbers N _v ^{Iсpi, respectively} , taking into account its measurement by a separate probe winch for the period of k minute measurements (formula 3) and N, is given to the inputs of the first 9 and second 12 converters _v ^IIav , taking into account n probe winches in operation (formula 4). The first 9 and second 12 converters process the information received at their inputs, followed by changing the presentation form from a binary code to an analog signal of 0.5 mA. From the outputs of the transducers 9 and 12, information about the average speed of the charge descent, taking into account the measurement of a separate probe winch for a given time interval and taking into account the number of probe winches in the measurement mode, is fed to the corresponding information inputs of the recording device 10. The recording device 10 produces 1 minute cyclic interrogation of information arriving at its inputs with its subsequent indication on a scale graduated in cm / min and registration with display on chart paper instrument.

 Block 6 scaling (Fig. 2) works as follows.

 From the first input of block 6, information in the form of pulses passes through the galvanic isolation element 14, where, for example, optoelectronic separation of the input circuits and their matching by level takes place. From the output of element 14, level-matched pulses arrive at the input of the Schmidt trigger 15, which forms the fronts of these pulses necessary for further reliable operation of the divider 17. The pulses processed in this way are transmitted from the output of the Schmidt trigger 15 to the first information input of the I16 element. Further pulse propagation through the element 16 to the first counting input of the divider 17 occurs only if there is a logical "1" at the second input of block 6 and the second control input of the element And associated with it 16. The circuit of the divider 17 contains two series connected binary-decimal counter (e.g., chips K 155IE2) and matching element chip K 155IE2 with four inputs. In this case, the coincidence element with the first three inputs is connected with the first three outputs of the first counter, the fourth input with the first output of the second counter, and the inverse output of the coincidence element is the output of the divider 17. Moreover, the R-inputs of both counters are connected and are the second control input of the divider 17, and the counting input of the divider 17 is connected to the C-input of the first counter. Thus, the circuit of the divider 17 provides, upon receipt of seventeen pulses at its first counting input, the appearance of one pulse at its output. This pulse of negative polarity arrives at the first control input of the AND-NOT 19 element and, if it is present at its second control input, the logical "1" is converted at the output of element 19 to a pulse of positive polarity. From the output 19, this pulse is supplied to the second control input of the divider 17, translating its counters into the initial state. Further, upon arrival at the counting input of the divider circuit 17 of the next seventeen pulses, the process of converting them is repeated and thereby scaling the input information of block 6 in accordance with formula (1) at k 17 pulses / mm.

 At the same time, the generated pulses at the output of the divider 17 come to the first information input of the counter 20. The counter 20 is assembled, for example, on two K 155IE5 microcircuits. In the operating mode of the account at the second control input of the counter 20 is a logical "0". In this case, the counter 20 counts the number of pulses arriving at its first input, followed by their presentation at the output with an eight-bit binary code. Subsequently, when a positive polarity pulse appears at the fourth control input of unit 6, the associated driver 22 gives a short pulse for its positive edge, which generates a code of numbers from the counter 20 output to its first information input at the second control input of output register 21. When a positive polarity pulse appears at the third control input of unit 6, the counter 20 is set to its initial position at the second control input. At the same time, the pulse passes through the inverter 18 and already the pulse of negative polarity acts on the second control input to the AND-NOT element 19. From the output of the element 19, the pulse of positive polarity goes to the second control input of the divider 17, resetting the counters of the divider 7 circuit to its original state. At the end of the pulse passing through the third control input of block 6, the operation of the divider 17 and the counter 20 resumes. In the future, when the next pulse of the control pulse appears at the fourth input of the block 6, new information accumulated by the counter 20 is recorded in the output register 21, which is set at the output of the block 6. And by the control pulse present at the third input of the block 6, the divider 17 and the counter are restarted 20. Thus, at the output of block 6, the code for the number of pulses transmitted to the first information input and converted according to formula 1 at k17 pulses / mm during the time interval between the last two pulses is constantly set by the control unit at the fourth input of block 6.

 The first averaging device 7 (Fig. 3) works as follows.

With the arrival of a control pulse of positive polarity to the fourth input of the device 7 and to the associated input of the first of the forty formers 22, the last on the positive edge of the control pulse starts and gives a short pulse at its output. By the negative edge of this short pulse, the second of the forty formers 22 is triggered, which gives a short pulse, which triggers the third of the forty formers 22 by its negative edge, etc. until the last of the forty formers 22 starts up. Simultaneously with the start of each of the forty serially connected formers 22, a second pulse input to the shift register 21 acts on the second control input with a short pulse from each former 22. So, when starting the first of forty formers 22 with the output of the thirty-ninth shift register 21, the number code is rewritten by the first information input in the fortieth shift register 21; when starting the second of forty shapers 22 with the exit of the thirty-eighth register 21 to the thirty-ninth shift register 21; when starting the third of forty shapers 22 with the output of the thirty-seventh register 21 in the thirty-eighth shift register 21, etc. At the same time, the last of the forty formers 22, when it is launched, will record the code of the number present at the first input of the device 7 via the first information input connected to it in the first shift register 21. Simultaneously with the rewriting of information in the first shift registers 21 with the arrival of a control pulse to the fourth input of the device 7, it will also shift at the corresponding information outputs from the first to the fortieth information inputs of the multiplexer 23. At the same time, a short pulse of negative polarity from the second inverse output of the last forty formers 22 acts on the first control input of the trigger 25, setting it in a single state. The appearance of a logical "0" at the second inverse output of the trigger 25 allows the forty-first control input to operate the multiplexer 23. And the appearance of a logical "1" at the first output of the trigger 25 starts the associated pulse generator 26. The counter 20, having in operating mode at the second control input a logical “0” and switching at the first input according to the negative pulse difference from the output of the generator 26, outputs the input switching code of the multiplexer 23 at its forty-second information input. In the operation mode of the multiplexer 23 from the output of one of the forty shift registers 21 through the corresponding and allowed input of the multiplexer 23, its output and the second inverter 18 connected with it, the number code is transmitted to the first information input of the adder 24. The result of the sum in the form of a code of numbers from the output of the adder 24 arrives at the first information input as the second,
of the third register 21. Simultaneously with the issuance of a control pulse for the counter 20 and further permission to switch the inputs of the multiplexer 23, the generator 26 generates a pulse, from the negative edge of which the second driver 22 is triggered. This driver 22 generates a short pulse, which is generated by the second control input of the second register 21 writes the code of the number present at its first information input. From the output of the second register 21, the code of the number as a result of the intermediate sum goes to the second information input of the adder 24 and then a new result in the form of a sum to the first information input of both the second and third registers 21. When the next pulses appear from the output of the generator 26, the above process of summing the code numbers read from the output of each of the forty shift registers 21 and passed through the multiplexer 23 will be repeated. The summation process will occur until the code of the number at the output of the counter 20 matches the code of the number present at the second input of the device 7, which are respectively supplied to the first and second information inputs of the comparison element 28. If the numbers of these codes coincide or are equal, the logical “0” will appear at the output of the comparison element 28, which sets the trigger 25 to the zero state at the second control input and, through the logical “1” inverter 18, sets the counter 20 to the second control input.

 The presence of a logical “0” at the first output of the trigger 25 prohibits the operation of the generator 26, and the presence of a logical “1” at the second output of the trigger 25 at the forty-first control input of the multiplexer 23 stops the switching of its information inputs with resetting. At the same time, at the moment of transition from logical “0” to logical “1”, a pulse is generated at the second inverse output of trigger 25, which starts the third driver 22. This driver 22 generates a short pulse, which on the one hand acts on the second control input on the third register 21, making a record of the current amount, present in the form of a code of numbers at its first input and coming from the output of the adder 24. On the other hand, the fourth shaper is launched on the negative edge of the output pulse of the third shaper 22 Atelier 22, which, with a short pulse, nullifies the second intermediate register 21 at the third control input and starts the fifth driver 22 by a positive edge. The fifth driver 22 generates a short pulse after startup, which acts on the third and fourth inputs on the multiplier 29, loading the numbers in the code present on the first and second information inputs of the multiplier 29. In this case, the first input of the multiplier 29 receives the code of the sum of numbers from the output of the third register 21, and the second input of the multiplier 29 receives the code chi la with the memory cell 27 output. At the output of the memory cell 27, the number code has a value equal to the reciprocal of the number code present at the second information input of the device 7 and the first information input of the memory cell 27 associated with it. Inverse cell numbers are programmed in memory cell 27 from 1 to 40, and when the corresponding number is received at the first information input of cell 27 and to which the corresponding address is determined, when there is a logical “0” at the second control input, the number in the code appears at the output of cell 27 the number in the code at the input of cell 27.

 The multiplier 29, having a logical “0” at the fifth control input in the operating mode, performs the operation of multiplying the numbers in the code received in the internal registers of the multiplier 29 from its first and second information inputs, followed by loading the multiplication result into the external register of the multiplier 29. C the output of the multiplier 29, the number in the code as a result of the calculation according to formula 3 is set at the output of the device 7. In the future, when the next control pulse appears on the fourth input of the device 7, a new information will be recorded mation present on the first input and its respective shift registers in the forty 21. At the output of the adder 24 and the multiplier 29 forms the new value of the code numbers, i.e. the above operation of the device 7 will be repeated. The appearance of a positive control pulse at the third input of the device 7 and at the third control inputs of the first forty shift registers 21 associated with it is accompanied by a translation of the latter into the initial state, in which the outputs of these shift registers 21 are zeroed. With this mode of operation of the device 7, reliable information will be established at its output only if its first forty registers 21 are sufficiently filled.

 The second averaging device 11 (Fig. 4) operates as follows.

 The device 11 is designed in such a way that the information located on the first “1 n” inputs of the device 11 is supplied in binary code to the information inputs of the adder 24. The adder 24 sums the numbers present on its inputs and the result of this operation is transferred to the second information input of the multiplier 29. At the same time, at the first information input there is a number in the code that is the reciprocal of the amount of information received at the first "1 n" inputs of device 11. Subsequently, when the device appears on the fourth control input 11 unit potential, 30 time relay starts. A time relay 30 with a delay of, for example, 0.1 s produces a pulse of positive polarity at its output. On the leading edge of this pulse, the multiplier 29 is launched into operation through the third and fourth control inputs. In this case, the multiplier 29 performs the operation of multiplying the numbers in the code located on the first and second information inputs. At the output of the multiplier 29, a binary number is generated equal to the arithmetic mean of the numbers present on the first "1 n" inputs of the device 11. At the same time, a shaper 22 is triggered by cutting a pulse generated at the output of the time relay 30, which generates a short pulse of positive polarity . This pulse records the number in the code coming from the output of the multiplier 29 through the first information input of the register 21. The number in the code is recorded by the second control input of the register 21, which receives a short pulse from the output of the shaper 22. From the output of the register 21, the result of the device 11 arrives at the output of the latter and is stored until the next pulse appears on the second control input of the register 21 or the “Reset” command is received on the third control input of the device 11 and, accordingly, the control appears pulse at the third input of the register 21.

 The control unit 13 (Fig. 5) operates as follows.

 At the first inputs "1 n" of block 13 from the control circuit of the electric drive of the probe winches, zero potential comes if the control probe is in the working position and the unit potential if this probe is in the exclusion position. Further, these signals are respectively present at the inputs of the first AND-NOT 19 elements, followed by the input from their output to the first inputs of AND 16 elements, the number of which corresponds to the value n of the control probes. In this case, if there is a logical “1” at the second inputs of the And 16 elements, then a logical “1” is set at the first outputs of block 13 if the corresponding control probe is in working condition and a logical “0” if this probe is excluded from operation. Simultaneously with the outputs of the first AND-NOT 19 elements, a combination of logical “1” and “0” (respectively, probes in operation and probes are excluded from operation) is supplied to the address inputs of the memory cell 27. In memory cell 27, by the value of n, the number of control probes in operation, the output records a number in the code that is inverse to n, i.e. value 1 / n. From the output of the memory cell 27, the value 1 / n is supplied to the second output of the unit 13. By the “Reset” command from the control button “SA1” of the unit 13, a short pulse of positive polarity is generated at the output of the fifth AND-NOT 19 element. From the output of the fifth AND-NOT 19 element, this pulse is fixed at the fifth output of block 13, the third control input of the OR element 31, followed by the output from the latter to the third output of block 13 and the fourth control input of timer 32, setting it to its original position. By the “Start” command, from the control button “SA2”, a positive polarity pulse is generated at the output of the fourth AND-NOT 19 element, which, through the first inverter 18, already switches the second RS-trigger 25 with a negative polarity pulse. In this case, the logical trigger is set at the output of the second trigger 25 "1", which through the second control input of the timer 32 prepares the latter to start.

 If there is zero potential at the third control input of block 13 (control probes in the furnace), a logical “1” is set at the output of the third AND-NOT 19 element, by which the second driver 22 is launched. A short pulse of negative polarity is generated at its inverse first output, which causes switching the first RS-flip-flop 25. At the output of the first flip-flop 25, a logical “1” is set, which starts the timer 32 at the first control input. At the same time, the timer 32 provides a delay time countdown, which is necessary Dima for exclusion from the time control period of transients caused by the raising and lowering of control probes in a blast furnace. The necessary command at the same time comes from the first output of the timer 32 to the fourth output of block 13 and through the third driver 22 to the fourth control input of the OR element 31. The OR element 31 is used to form the “Reset” command, which comes from its output to the third output of the block 13. If there is a zero potential at the second control input of block 13 (rise of control probes), a logical “1” is established at the output of the second I-NOT 19 element, by which the first driver 22 is launched. A short one is formed at its first inverse output pulse of negative polarity, which switches the first trigger 25. At the output of the first trigger 25, and therefore at the first control input of timer 32, a logical "0" is set, which fixes the prohibition of the timer 32. At the same time, a short positive pulse from the second output of the first driver 22 the polarity acts on the third control input on the timer 32, setting it to its original position, and on the first control input on the element OR 31. In this case, the output signal OR 31 generates a signal "Reset" positive polarity, which is fixed at the third output of block 13. At the second output of timer 32 and, accordingly, at the second control inputs of AND 16 elements, logical “0” appears, which prohibit the passage of signals (control probe in operation) to the first outputs of block 13. And only with the appearance of the next zero potential at the third input of block 13, the second driver 22, which generates a short pulse of negative polarity at its inverse output, is launched through the third AND-NOT 19 element. This pulse switches the first trigger 25, at its output and, accordingly, at the first control input of the timer 32, a logical "1" is set, which provides permission for the timer 32 to work. The delay time starts, after which a logical "1" is set at the second output of the timer 32 , which removes the prohibition of the passage of signals through the elements And 16 to the first outputs of the block 13. Subsequently, the timer 32 starts to generate minute pulses, which from the first output of the timer 32 are fed to the fourth output of the block 13. Simultaneously At the same time, the minute pulses of the timer 32 through the third driver 22 are fed to the fourth control input of the OR element 31 (formation of the “Reset” signal). With the appearance of zero potential at the second control input of block 13, the cycle of the latter will be repeated.

 The proposed device allows to improve the technical and economic performance of the blast furnace by ensuring the reliability and accuracy of the control of the rate of descent of the charge when conducting blast furnace smelting, including with several control probes.

 Using information on the average rate of descent of the charge, taking into account the measurement results of a separate probe winch for a given time interval and taking into account the number of winches in the measurement mode, will reduce the heating fluctuations of the furnace, reduce the average silicon content in cast iron, which indicates the application of the invention in conditions production of low-silicon cast iron.

Claims (1)

 DEVICE FOR DETERMINING THE AVERAGE FLOW DEPTH OF THE BATCH IN THE DOMAIN FURNACE, containing a control unit and a measuring channel, consisting of a probe with a drive for moving it parallel to the vertical axis of the furnace, the output shaft of which is connected to the sensor of the rotation unit, the first averaging unit with an averaging cycle time adjuster connected through the first a converter with a recorder, characterized in that it is equipped with several measuring channels, a second averaging unit and a second converter, and into each measuring channel den the scaling unit, the first input of which is connected to the angle sensor, and the output with the second input of the first averaging unit, the second fourth inputs of the scaling unit of each measuring channel, as well as the fourth and third inputs of the first averaging unit, are connected to the outputs of the first averaging unit each measuring channel, as well as three outputs of the control unit are connected to the inputs of the second averaging unit, the output of which through the second converter is connected to the recorder.

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