SU840829A2

SU840829A2 - Device for control of metering-out process

Info

Publication number: SU840829A2
Application number: SU792741733A
Authority: SU
Inventors: Родион Георгиевич Барский; Владимир Александрович Воробьев; Олег Валентинович Скрипка
Original assignee: Московский Автомобильно-Дорожныйинститут
Priority date: 1979-03-16
Filing date: 1979-03-16
Publication date: 1981-06-23

Description

Изобретение относится к дозированию различных материалов и может применяться в химической, металлургической, строительной и других отраслях промышленности.The invention relates to the dosing of various materials and can be used in the chemical, metallurgical, construction and other industries.

Известны устройства для дозирования с автоматической корректировкой дозы воды с учетом влажности заполнителей, содержащее дозаторы воды, цемента и заполнителей, снабженные влагомерами, счетно-решающими устройствами и исполнительными механизмами.Known devices for dispensing with automatic adjustment of the dose of water taking into account the moisture content of the aggregates, containing dispensers of water, cement and aggregates, equipped with moisture meters, counting devices and actuators.

Недостатком известных устройств является низкая точность дозирования в силу возникновения как систематических, так и случайных погрешностей^ которые в известных устройствах не компенсируются.A disadvantage of the known devices is the low metering accuracy due to the occurrence of both systematic and random errors ^ which are not compensated in the known devices.

По основному авт.св. № 702357 известно устройство для управления дозированием, содержащее дозаторы, блоки умножения и сумматоры П1·By main auto No. 702357, a dispensing control device is known comprising dispensers, multiplication units and adders P1

Недостатком известного устройства является отсутствие автоматической коррекции масс доз компонентов, сос тавляющих смесь в зависимости от их влагосодепжанияЦель иэобпетения - повышение точности устройства.A disadvantage of the known device is the lack of automatic correction of the mass doses of the components that make up the mixture, depending on their moisture content. The goal is to improve the accuracy of the device.

Поставленная цель достигается тем, что в устройство для управления дози рованием, введен третий сумматор, а в каждый канал введены третий и четвертый блоки умножения, в первый ка нал введены последовательно соединенные пятый блок умножения и четвертый сумматор, а в* каждый последующий канал - шестой блок умножения, причем выход дозатора первого канала подключен ко входу блока умножения и ко входу пятого блока умножения данного канала через четвертый блок умножения второй выход дозатора каждого последующего канала подключен ко входу второго блока умножения через соответствующий четвертый блок умножения, а первый выход подключен к первому входу первого сумматора через шестой ³ 840829 блок умножения, выход дозатора первого канала и вторые выходы дозаторов последующих каналов соединены с входами третьего суммматора через соответствующие третьи блоки умножения, выход третьего сумматора через четвертый сумматор первого канала связан со входом дозатора последнего канала.This goal is achieved by the fact that a third adder is introduced into the metering control device, and the third and fourth multiplication units are introduced into each channel, the fifth multiplication unit and the fourth adder are connected in series to the first channel, and the sixth to each subsequent channel a multiplication unit, wherein the output of the dispenser of the first channel is connected to the input of the multiplication unit and to the input of the fifth multiplication unit of this channel through the fourth multiplication unit, the second output of the dispenser of each subsequent channel is connected to the input of the second th multiplication unit via the respective fourth multiplier, a first output connected to the first input of the first adder via the sixth ³ 840829 multiplier, the output of the dispenser of the first channel and second outputs dispensers subsequent channels are connected to inputs of the third summmatora through respective third multiplication blocks third adder output via the fourth adder of the first channel is connected to the input of the dispenser of the last channel.

На чертеже представлена блок-схема предлагаемого устройства.The drawing shows a block diagram of the proposed device.

Устройство содержит дозаторы I 1 _п , первые блоки 2^- 2_ГЬ1умножения, вторые блоки 3^- З^умножения, первые сумматоры 4₁~ ^.^вторые сумматоры 5^ - ^.фТретьи блоки 64- умножения, четвертые блоки 1_Л - 7_П__Иумножения, пятый блок 8 умножения, шестые блоки 9-,- 9_и^умножения, третий сумматор 10, четвертый сумматор I 1 .The device contains dispensers I 1 _n , the first blocks 2 ^ - 2 _Г1 multiplication, the second blocks 3 ^ - З ^ multiplication, the first adders 4 ₁ ~ ^. ^ The second adders 5 ^ - ^. The third blocks 64-multiplication, the fourth blocks 1 _Л - 7 _P _ _And multiplication, the fifth block 8 of the multiplication, the sixth blocks 9 -, - 9 _and ^ of the multiplication, the third adder 10, the fourth adder I 1.

Устройство работает следующим образом..The device operates as follows ..

В устройстве применены дозаторы порционного действия, обеспечивающие режим грубого и последующего точного взвешивания в режиме досыпки .The device uses batchers of batch action, providing a mode of coarse and subsequent accurate weighing in the mode of filling.

Пусть смесь состоит из η компонентов х_и,х ц...х_п, долевое содержание которых в смеси, установленное по технологическим нормам, равно:Let the mixture consist of η components x _and , x c ... x _p , the fractional content of which in the mixture, established by technological standards, is equal to:

i-Ί ......i-Ί ......

где, (=1,2,3,...п; х°- значение дозы i-ro компонента, задаваемое уставка ми СЦ на дозаторах. Каждый i-ый компонент дозируется соответствующим дозатором Ц...1_п. Дозаторы - 1η в соответствии с сигналом (уставками) на их управляющих входах производят дозирование компонентов смеси в режиме грубого взвешивания одновременно, а затем происходит взвешивание отдозированных масс компонентов и работой начинает управлять предлагаемое устройство.where, (= 1,2,3, ... p; x ° is the dose value of the i-ro component, set by the SC setpoint on the dispensers. Each i-component is dispensed by the corresponding dispenser C ... 1 _p . Dosers - 1η in accordance with the signal (settings) at their control inputs, the components of the mixture are dosed in the coarse weighing mode at the same time, and then the metered masses of the components are weighed and the proposed device begins to control the work.

Ввиду того, что процесс дозирования сопровождается погрешностями, массы компонентов отдозированных в грубом режиме не будут равны требуемым.Due to the fact that the dosing process is accompanied by errors, the masses of the components metered in the rough mode will not be equal to the required.

Предположим, что в начале дозируется компонент х^- цемент и первый дозатор l_h в грубом режиме и последующем - точном, отдозировал массу цемента равную х^(С_и). После этого, сигнал, пропорциональный измеренной массе цемента, поступает в третий и четвертый блоки 6^ и 7_И умно4 жеиия, где соответственно умножается на коэффициенты А, и 1-А, учитывающие содержание воды и сухой вес цемента. Из блока 7_Лумножения сигнал поступает в пятый блок 8 умножения, где умножается сухая масса цемента на коэффициент В/Ц отношения 7 В/Ц. Из пятого блока 8 умножения сигнал равный необходимой массе воды без учета влагосодержания остальных компонентов поступает в четвертый сумматор II, где он запоминается.Suppose that at the beginning the component x ^ is dispensed - cement and the first dispenser l _h in the rough mode and the subsequent - exact, dosed the cement mass equal to x ^ (С _и ). After that, a signal proportional to the measured mass of cement enters the third and fourth blocks 6 ^ and 7 _And smart4, where it is respectively multiplied by the coefficients A, and 1-A, taking into account the water content and dry weight of the cement. From the multiplication unit 7 _L , the signal enters the fifth multiplication unit 8, where the dry mass of cement is multiplied by a W / C ratio of 7 V / C. From the fifth block 8 of the multiplication, a signal equal to the required mass of water without taking into account the moisture content of the remaining components enters the fourth adder II, where it is stored.

Перед началом дозирования второго в установленной последовательности компонента определяется значение скользящей массы массы, при которой рования компонента х_и (цемента) была бы равна нулю. Это зящсй массы равно :М^= По массе М,определяется уставка второго дозатора (для режима досыпки) компонента Xj равная С-^^х^ (С_л)/7-Хц(Сц)₍где x^QC^J масса компонента х^_, отдозированная дозатором 1ц в грубом режиме. Для этого сигнал с выхода четвертого блока 7^ умножения поступает на первый блок 2^умножения и умножается на величину ( постоянный коэффициент). Полученный резуль^-’ тат с выхода первого блока 7-j умножения поступает на первый вход второго сумматора 4-1 на второй вход которого поступает сигнал с первого выхода дозатора 1ц, предварительно умноженный в шестом блоке 9и умножения на коэффициент, учитывающий сухой вес компонента х₂, отдозированного в грубом режиме, и несущий информацию о массе этого компонента. После алгебраического суммирования этих двух величин, полученный результат с выхода второго сумматора 4^поступает в качестве уставки дозатора.1ц для точного взвешивания.Before dosing of the second component in the established sequence, the value of the moving mass of the mass is determined at which the component x _and (cement) are equal to zero. This mass is equal to: M ^ = By mass M, the setting of the second dispenser (for the refill mode) of the component Xj is determined equal to C - ^^ x ^ (C _l ) / 7-Xc (Cs) ₍ where x ^ QC ^ J is the mass of the component x ^ _, dispensed by dispenser 1c in rough mode. To do this, the signal from the output of the fourth block 7 ^ multiplication is fed to the first block 2 ^ multiplication and is multiplied by the value (constant coefficient). The resulting result ^- 'tat from the output of the first block 7-j multiplication arrives at the first input of the second adder 4-1, the second input of which receives a signal from the first output of the dispenser 1c, previously cleverly which is multiplied by the coefficient taking into account the dry weight of the component x ₂ dispensed in rough mode and carrying information about the mass of this component, after algebraic summation of these two quantities, the result obtained from the output of the second adder 4 ^ comes as the dispenser setting. 1c for accurate weighing.

Второй дозатор 1ц дозирует в грубом и точном режимах количество массы второго компонента равно x^Cj. Значение скользящей массы смеси Неопределяемое величиной масСы второго компонента, равно: М= Хц(С_а)/Х.The second dispenser 1c dispenses in rough and precise conditions the amount of mass of the second component is x ^ Cj. The value of the moving mass of the mixture Undetermined by the mass value of the second component is: M = Xc (C _a ) / X.

Значение, уставки С® для третьего дозатора определяется, исходя из условия минимума погрешности дозирования, поэтому величина скользящей массы смеси Мц после дозирования двух компонентов определится как среднее арифметическое из масс М^'и Иц. Для .этого сигналы с выходов первого иThe value C ° settings for the third dispenser is determined on the basis of the condition of the minimum metering error, therefore the value of the moving mass of the mixture Mc after dosing of the two components is determined as the arithmetic average of the masses M ^ 'and Ic. For this, the signals from the outputs of the first and

M.J , т.е. такой погрешность дозизначение сколь-M.J, i.e. such an error

второго дозаторов, умноженные· на соответствующие коэффициенты влагосодержания в четвертых блоках 7_Л и 7/£ умножения , поступают соответственно на входы вторых блоков $ умножения,где умножаются ййкоэффициенты (соответственно) I и 1 , после чего сигналы с выходов вторых блоков 3₄ и 3^2 умножения поступают на входы первого сумматора 5^. Сиг- щ нал с выхода первого сумматора 5_Л поступает на вход первого блока 2 умножения третьего дозатора, .где умножается на величину^/2, а затем поступает на первый вход второго сумматора и 4^, где из него вычитается, сигнал, пропорциональный массе компонента х о.тдозированной В грубом режиме с учетом сухого веса этого компонента (шестой блок 9^ умножения). 20of the second dispenser, multiplied by the corresponding moisture content coefficients in the fourth blocks of 7 _L and 7 / £ multiplication, respectively, are supplied to the inputs of the second blocks of $ multiplication, where the coefficients (respectively) I and 1 are multiplied, after which the signals from the outputs of the second blocks 3 ₄ and 3 ^ 2 multiplications go to the inputs of the first adder 5 ^. The signal from the output of the first adder 5 _L goes to the input of the first unit 2 of the multiplication of the third dispenser, where it is multiplied by the value ^ / 2, and then it goes to the first input of the second adder and 4 ^, where the signal is proportional to the mass component x o. dosed In rough mode, taking into account the dry weight of this component (sixth block 9 ^ multiplication). 20

Таким образом, формируется значение сигнала (уставки) С| на третий дозатор I3.Thus, the value of the signal (setting) C | to the third dispenser I3.

Уставка на п-1 дозатор также определяется, исходя из значения 25 скользящей массы смеси М^^равной средней арифметической из уже отдозированных масс.The setting for p-1 dispenser is also determined based on the value 25 of the moving mass of the mixture M ^^ equal to the arithmetic average of the already dispensed masses.

Кроме этого, параллельно с ра- ₃θ ботой рассмотренных блоков сигналы со вторых выходов дозаторов поступают на входы третьих блоков 6₄умножения* где умножаются на коэффи- ⁰циенты влагосодержания соответствующйх компонентов и затем, уже как сигналы, пропорциональные отдозированной влаги, поступают в третий сумматор 10, откуда сигнал, пропорциональный общему содержанию влаги, _4£}поступает в четвертый сумматор 11,где происходит его алгебраическое суммирование с сигналом, поступившем из пятого блока 8 умножения на коэффициент В/Ц отношения и результат используется как уставка задатчика дозатора 1_п воды. |Additionally, in parallel with the PA θ ₃ Botha signals from the second metering outputs the considered blocks applied to the inputs of third unit 6 ₄ multiplications * where multiplied by the coefficient ⁰ cients sootvetstvuyuschyh moisture components, and then, the signals are already proportional otdozirovannoy moisture are supplied to the third adder 10, whence a signal proportional to the total moisture content, _{4 £}} goes to the fourth adder 11, where it is algebraically summed with the signal received from the fifth block 8 of the multiplication by the coefficient V / C ratio and p The result is used as the setpoint for the dispenser setpoint of 1 _p water. |

Таким образом, в сумматоре 10 определяется. результирующая масса воды, отдозированной со всеми n-Ι компонентами, а в сумматоре 11 этот сигнал вычитается из величины уставки дозатора воды, определенной по сухой массе цемента.Thus, in the adder 10 is determined. the resulting mass of water dispensed with all n-Ι components, and in the adder 11, this signal is subtracted from the value of the water dispenser setting, determined by the dry weight of the cement.

Claims

The invention relates to the dosing of various materials and can be applied in the chemical, metallurgical, construction and other industries. Batching devices are known with an automatic adjustment of the water dose with regard to the moisture of the aggregates, containing dispensers of water, cement and aggregates, provided with moisture meters, counting devices and actuators. A disadvantage of the known devices is the low accuracy of dosing in POWER, the occurrence of both systematic and random errors that are not compensated in the known devices. According to the main auth. No. 702357, a device for controlling the dosage is known, containing dispensers, multipliers, and adders Dl. A disadvantage of the known device is the lack of automatic correction of the mass doses of the components that make up the mixture depending on their moisture content. The purpose of this is to improve the accuracy of the device. The delivered chain is achieved by introducing a third adder into the dosing control device, and the third and fourth multiplication units are inserted into each channel, the fifth multiply unit and the fourth adder are sequentially connected to the first channel, and the sixth multiplication unit is inserted into each subsequent channel, moreover, the output of the first channel dispenser is connected to the input of the multiplication unit and to the input of the fifth multiplier unit of this channel through the fourth multiplication unit the second output of the dispenser of each subsequent channel is connected to the input v The first multiplier is connected to the first multiplier unit, and the first output is connected to the first input of the first adder through the sixth multiplication unit, the output of the dispenser of the first channel and the second outputs of the dispensers of the subsequent channels are connected to the inputs of the third totalizer through the corresponding third multiplier units, and the output of the third adder through the fourth adder of the first channel is connected with the input of the dispenser of the last channel; FIG. 1 is a block diagram of the proposed device. The device contains metering devices C 1, first multiplying blocks 2, second multiplying blocks Cp multiplying, first adders second adders 5y., Third blocks 6 -, - 6 ,, - multiplying, fourth blocks 7, - 7. multiplying, five block 8 multiplying , the sixth blocks 9 -, - 9C multiply, the third adder 10, the fourth adder. The device operates as follows. The device uses batch dispensers that provide the mode of coarse and subsequent accurate weighing in the feed mode. Suppose that ss consists of l components x, x. . Хр, the fraction of which in the mixture, established by technological standards, is: Jfi-Zn I where,, 2,3, ... n; x ° is the dose value of the i-ro component, specified by the settings on the dispensers. Each first component is dosed correspondingly 10) with a dispenser l. ,, Y. Dispensers 1 n in accordance with the signal (the settings on their controls (their inputs make dosing of the components of the mixture in coarse weighing mode at the same time), and then the weighted masses of the components are weighed and the proposed device starts to operate. inaccuracies, the masses of the components dosed in the coarse mode will not be equal to the required ones. Suppose that at the beginning we meter on the component X -, - cement and the first batcher Ij, in the coarse mode and the subsequent one - exact, separate The cement mass is equal to x (C). After that, a signal proportional to the measured cement mass enters the third and fourth blocks 6jj and 7 multiplication, where it is multiplied by the coefficients A and 1-A, taking into account the water content and the dry weight of the cement. From block 7, the signal enters fifth multiplier block 8, where the dry weight of cement is multiplied by the coefficient W / C of the ratio W / D. From the fifth block 8 multiplies, the signal equal to the required mass of water without taking into account the moisture content of the other components goes to the fourth adder II , where is he remembered. Before starting the dosing of the second component in the prescribed sequence, the value of the sliding mass M, i.e. of such a mass, at which the metering error of component x (cement would be zero. This value of the masses is equal to: M x (C -,) f. The mass of the second metering device (for the filling mode) of component Xx is equal to the mass of M. () lf--x.CC) f where X CC jMacca of component x, dosed by dispenser 12 in coarse mode. For this, the signal from the output of the fourth multiplication unit 7 is fed to the first multiplication unit 2 and multiplied by the value of j- // (constant coefficient). The result obtained from the output of the first multiplication unit 7 is fed to the first input of the second adder 4-1 to the second input of which receives a signal from the first output of the dispenser C, previously multiplied in the sixth block 9 multiplied by a factor, which gives the dry weight of the component k, coarsely dosed, and carrying information about the mass of this component. After algebraic summing of these two quantities, the result obtained from the output of the second adder 4 is supplied as the setpoint of the dispenser. 1 for accurate weighing. The second dispenser 1 / j dispenses in coarse and precise modes the amount of mass of the second gun to be equal to. The sliding mass of mixture 11, determined by the mass of the second component, is equal to: M yi (G, Setpoint value C for the third dispenser is determined on the basis of the minimum dosing error, therefore, the magnitude of the sliding mass M / 2 after dosing the two components is determined as the arithmetic average of the masses M. For this, the signals from the outputs of the first and second metering devices multiplied by the corresponding coefficients of moisture content in the fourth block :: 7 and 7/2 multiplications, arrive appropriately at the inputs of the second blocks intelligently This is where the coefficients (corresponding) l / SlK are multiplied and the signals from the outputs of the second blocks 3 are multiplied, and the inputs of the first adder 5 arrive at the multiplications. The signal from the output of the first adder 5 goes to the input of the first block 2 of the smart third dispenser, where It is measured by J / 2 and then fed to the first input of the second adder 4.2, where it is subtracted a signal proportional to the mass of the components x in the dosed and coarse mode, taking into account the dry weight of this component (sixth block 9.2 multiplication). Thus, the value of the signal (setpoint) C to the third metering unit 13 is formed. The setpoint on the n-1 metering unit is also determined based on the value of the sliding mass of the mixture M, equal to the arithmetic average of the already separated masses. In addition, in parallel with the operation of the considered blocks, the signals from the second outputs of the metering units are fed to the inputs of the third blocks of 6 g multiplication, where they are multiplied by the moisture coefficients of the respective components and then, as signals proportional to the absorbed moisture, go to the third adder 10, from which the signal proportional to the total moisture content, enters the fourth adder 11, where it is summed algebraically with the signal from the fifth block 8 multiplied by the ratio W / C ratio and the result tat 6 is used as setpoint setpoint dispenser 1C water, j Thus, the adder 10 determines a resultant mass of water otdozirovannoy with all n-1 components and the adder 1, this signal is subtracted from the setpoint water dispenser as defined on dry weight of cement. The invention The device for controlling the dosing according to bus no. 702357, characterized in that, in order to increase the accuracy of the device, a third adder is inserted into it, and the third and fourth blocks of multiply extension are inserted into each channel, serially connected to the first channel. the fifth multiplication unit and the fourth cyt.iMaTop, and in each subsequent channel - the sixth multiplication unit, the metering output of the first channel is connected to the input of the multiplication unit and to the input of the fifth multiplication unit of this channel through the fourth multiplication unit, the second you One metering unit of each subsequent channel is connected to the input of the second multiplication unit via the corresponding fourth multiplication unit, and the first output is connected to the first input of the first adder via the sixth unit multiply, the output of the first channel metering unit and the second outputs of the next channel metering units are connected to the inputs of the third adder through the corresponding third the multipliers, the output of the third accumulator, through the fourth adder of the first channel are connected to the input of the dispenser of the last channel. Sources of information taken into account in the examination 1. USSR author's certificate p-702357, cl. QOSD P / 13, 1978 (prototype).