SU545402A1 - System for controlling the rate of delivery of metal from heating furnaces - Google Patents

Description

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The invention relates to metallurgy, to rolling and production, in particular to control systems of the kiln-rolling mill complexes.

There is a well-known system for controlling the rate of delivery of metal from heating furnaces, which contains a release clamp, an unloading machine control unit, serially connected time meters for each mill of the rolling line, time interval discriminators, and shapers of the processing times of the blanks for each mill line separately. In the system, with the help of calculated blocks, mathematical expectations are determined, of which the maximum expectation device selects the maximum mathematical expectation, determines the mill, which on average is the "bottleneck of the rolling unit, and the resulting expectation value is taken as the time interval between outputs, on the control unit of the unloading machine of the furnace.

However, a narrow place is determined by the maximum value of the expectation of the machining times of the blanks, which does not correspond to the random nature of its movement in the line, as a result of which the system’s operation is not sufficiently effective, resulting in a very high production rate.

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the quality of rolled products, an increase in irretrievable heat loss and electric power for rolling a unit of product.

The aim of the invention is to improve the performance of the rolling mill, to improve the quality of the finished product, to reduce the fuel and electric power consumption.

The aim is achieved by the fact that the system of darkening the discharge of metal from heating inadvertently contains operative memory blocks, mill separation blocks with the maximum processing time of the workpieces, memory blocks, a location probability distribution generator on the mill line with the maximum processing time of the blanks, two blocks Comparison, two random number generators, a blocking block, and, in this way, the outputs of the discriminators of time intervals are connected to the inputs of the corresponding operations. new storage units, the outputs of which are connected to the inlet of the mill separation mill with the maximum processing time of the workpieces, the output of which is connected to the input of the locking unit, its output is connected to the input of the location probability distribution generator on the shaft of the mill with the 1x max 1, the processing time of the workpiece, the output of which is connected to the input of the first comparison unit, the second input

The first comparison unit is connected to the output of the first random number generator, the output of the first comparison unit is connected to the control input of the blocking block, its other inputs are connected to the outputs of the drivers of probability distribution of the workpiece processing time, and the output of the blocking block is connected to the first input of the second block of the second block the input of which is connected to the output of the second random generator, the output of the second comparison unit is connected to the control input of the control unit of the unloading machine, the outputs are fixed and issuing connected with the control inputs geieratorov random numbers n control input allocating unit staia maximum blanking time.

The drawing shows a block diagram of a system for controlling the rate of delivery of metal from a heating furnace.

In the drawing, there are: rolling mills 1, billet 2, heating furnace 3, meters 4 vrims, differential timers 5 temporary intervals, 6 memory, formers 7 probabilities of processing times of workpieces, operative storage units 8, unit 9 for separating the mill maximal, 1 processing time of the workpieces, storage unit 10, shaper 11 probability distribution of the month of the mill with the maximum processing time on the line, the first comparison unit 12, the first random number generator 13, the blocking block H, second b Lok 15 Comparison, the second leuopaTop 16 random numbers, block 17 controls the unloading machine, latch 18 issue.

The outputs are connected to the inputs of the corresponding discriminators 5 time intervals connected by the outputs to the inputs of the corresponding blocks of 6 us, the outputs of which are connected to the inputs of the corresponding drivers connected to the outputs of the corresponding inputs of the blocking block 14.

The outputs of the discriminators 5 are also connected to the inputs of operative storage blocks 8, the outputs of which are connected to the inputs of block 9, the output of which is connected to the input of the memory-reading unit 10, connected to the input of the driver And, the output of which is connected to the first input of the first block 12 comparison, to the second input of which the output of the first random number generator 13 is connected, the output of the first comparison unit 12 is connected to the control input of the blocking block 14, the output of which is connected to the first input of the second block 15 compared The second input of which is connected to the output of the second random number generator 16, and the output of the second comparison unit 15 is connected to the control input of block 17. The output of release latch 18 is connected to the control inputs of the generators 13, 16 and to the control input. .

The control system of temperature of metal output from heaters works as follows.

The time spent by each camp 1 on

the processing of offsets issued from the burning furnace 3 is determined by the gauges 4. This time and the identifier spins is time-spaced in the corresponding discriminators 5 time intervals, from which the signal

enters the corresponding registers of these blocks 6. On the basis of the information of the mapping of blocks 6 in the formers 7, the probabilities of the processing times of the workpieces for each step are formed. From discriminators 5 1P1formapp arrives also in the operational storage units 8, and they remember the information obtained only on the last polling cycle. From blocks 8, the information is transmitted to block 9. After determining the pa data of the polling cycle of the mill with the maximum processing time, the unit is sent to the corresponding register of the memory block 10, and the formator of the mill location with the maximum processing time is generated by the I driver. on line. In the first comparison unit 12, to the second input of which it is equal to. The random number distributed by the first generator 13 random numbers distributed in the interval (0.1) is selected by the first generator with the maximum processing time, i.e. the mill place, random pop, and feeds an impulse to the blocking block 14, which unlocks that channel of the processing time allocator, which corresponds to the selected camp - the bottleneck. In the second comparison block 15, to the first input of which information is received on the distribution of processing times of the selected mill is a bottleneck, and the second number generated by the second generator 16 random numbers distributed uniformly in the interval (0.1) is selected, the value is selected a random search method from

The pointer is distributed. The selected random variable, which is taken as a pause between successive outputs, is fed to the unloading control block 17 of the map. The polling clock is set by pulses from the release latch 18, which is fed to the control input of block 9 and to the control inputs of both random number generators 13, 16.

This system allows the system to significantly increase the productivity of the pipe-rolling unit, improve the quality of the finished product, and reduce fuel costs for heating and energy consumption for compression,

since the control of the metal delivery rate must be carried out in accordance with the tact of the "bottleneck", which in the danap system is determined randomly, which corresponds to the random nature of the displaced "bottleneck on the line.