SU709153A1 - Apparatus for preparing mixtures of required composition - Google Patents

Description

one

The invention relates to devices for composing mixtures from dissimilar components and can be used in ferrous and nonferrous metallurgy, chemical industry, construction materials and other parts. gih otrash x

A device for compiling mixtures is known, including automatic weighing dispensers, a mixer, averagers for mixtures and components, analyzers of the mixture and components, Q QS; included at the output of the corresponding sample averagers, a mixture composition setting device, the output of which is connected to the input of the analyzer of the mixture connected to controllers the following chain m anash: s: sug:. the remaining components governing j yr-o; Which is associated with setter gauges:; sscK dispensers 1.

The disadvantage of this device is that the composition of the mixture, which accumulates in the mixture ... deviates from the set value following JQ due to errors in the operation of stabilization systems caused by intense disturbances (suspension of the material, clogging of paths) and transient processes.

The purpose of the invention is to improve the quality of the prepared mixture.

The goal is achieved by the fact that the device additionally contains blocks for storing the composition of components connected to analyzers of the composition of components and the inputs of the control unit. integrating flow meters whose inputs are connected to dispensers, a unit for calculating the current mixture composition associated with the outputs of the control unit and units for storing the composition of components, a summing unit associated with the outputs for integrating flow meters, serially connected unit of the total amount of the mixture and unit for calculating the amount of mixture, the unit for calculating the current correction of the mixture composition task, the inputs of which are connected to the unit for calculating the current composition of the mixture, the summing unit, the unit for calculating the amount of the mixture and h ratio sensor and an output - to the control unit.

Claims (1)

The drawing shows a schematic diagram of a device for preparing a three-component mixture. The device contains metering devices 1, averagers 2 of sample composition, analyzers 3 of composition components, a mixer, 4, a mixture composition analyzer 5, a mixture composition setter 6, a component composition memory 7, integrating flow meters 8, a current mixture composition calculation unit 9, a summing unit 10, the loader AND the total amount of the mixture associated with the unit 12 for calculating the amount of the mixture required to completely fill the mixer, the unit 13 for calculating the current correction of the mixture composition setting, the control unit 14, the setting devices 15 of the metering settings. The device works as follows. On the setter And the total amount of the mixture and the setter 6 of the composition of the mixture, respectively, set the specified value of the total amount of the mixture in the mixer 4 and the specified values of the indicators of the quality of the mixture. Using analyzers 3, initial component quality indicators are determined. The signals from the analyzers 3 are fed to the inputs of the zapmin modules. 7, from where they are fed to the control unit 14. At the initial moment, the signals from blocks 9 and 10 are zero, and the readings at the output of block 13 coincide with the indications of the setter 6 of the mixture composition. Based on these signals, in block 14, the initial values of the metering capacities are calculated based on the initial mathematical model, which is the following system: Zll l + ai2P2 + - + 2, jq, ajiPi + a22D2 + - g Pi Qs fliiPj + aj2p2 + - + aiJPj Qi where Oj is the i-th quality indicator of the j-ro component, for example, the percentage of the gth fraction in the J-TOM component or the i-ro chemical element in the J-TOM component; - the proportion of the j-ro component in the dosing material; - given i-ro value of the quality index of the finished mixture. The ratios of paged components found from system (1) are recalculated in the performance of the component dispensers using the following formula:. i where .X is the metering capacity of the jth component; L - given the total performance of all dispensers. The signals from the integrating flow meters 8, corresponding to the actual number of each component entering the mixer 4, are continuously fed to the input of the summing unit 10 and to the input of block 9. Calculating the current mixture, which also receives signals from memory cells 7 and control block 14 on the current ratios of the components to be dosed. Using this data, in block 9, the current values of the quality indicators of the mixture in the mixer 4 are calculated. The signal from the summing unit 10 comes together with the signal from the setting unit 11 of the total amount of the mixture fa inputs of the block 12, where the amount of the mixture that is to go to the mixer 4 is determined until the end of its filling. The signals from the outputs of blocks 9, 10 and 12 and the compressor 6 of the mixture composition are fed to the inputs of the block 13 for calculating the current correction of the mixture composition setting. In block 13, a task is generated for the composition of the mixture, which enters the mixer in the remaining filling time. The signals from block 13 are fed to the input of the controlling block 14. In block 14, the adjusted metering capacities of the tori are calculated, which are implemented using the set points of 15 metering units. Periodically, the device is produced on the LIPS of the current mixture composition in mixer 4 by the analyzer 5. The resulting composition characteristic is compared with the predetermined mixture composition generator 6. When deviations of the composition of the mixture exceed the permissible values, analyzer 5 includes analyzers 3, which analyze the composition of each of the components. From the outputs of the analyzers 3, information about the composition of the components goes into the corresponding memory blocks 7, and then E calculations involve new characteristics of the composition of the components. The described device makes it possible to improve the quality of the prepared mixture by more accurately scooping the starting components. Apparatus of the Invention A device for composing mixtures of a given composition, including automatic weighing dispensers, a mixer, sample mixers and components averagers, analyzers of the mixture composition and components, connected to the corresponding sample averagers, back of the mixture composition, the output of which is connected to the input of the mixture analyzer connected to the control circuits of the component composition analyzers, the control unit, the output of which is connected with the setting units of the metering settings, characterized in that, in order to increase the quality, The mixture additionally contains blocks for storing the composition of components, connected to the analyzers of the components and the inputs of the control unit, integuing flow meters, the inputs of which are connected to the dispensers and a block for calculating the current composition of the mixture associated with the outputs of the control block and blocks for storing the composition of components, summing the unit associated with the outputs of the integrating flow meters, serially connected master of the total amount of the mixture and the unit for calculating the amount of the mixture, the unit calculating the current orksch { set the composition of the mixture, the inputs of which are connected to the unit of the current composition of the mixture, the summing unit, the unit for calculating the amount of the mixture and the unit for the composition of the mixture, and the output to the control unit. Sources of information taken into account during the examination 1. USSR Copyright Certificate No., cl. On 01 F 15/04, 1973.