SU1362940A1

SU1362940A1 - Device for calibrating metering pump

Info

Publication number: SU1362940A1
Application number: SU864004030A
Authority: SU
Inventors: Виктор Александрович Серебренников; Юрий Федорович Петров; Игорь Олегович Файман; Вилен Николаевич Слободянюк
Original assignee: Научно-производственное объединение "Полимерсинтез"
Priority date: 1986-01-06
Filing date: 1986-01-06
Publication date: 1987-12-30

Description

11362940 11362940

Изобретение относитс к устройству дл калибровки дозировочного насоса и может использоватьс в химической промышленности, в частности дл калибровки насоса в рабочем режиме без прерывани подачи компонентов.The invention relates to a device for calibrating a dosing pump and can be used in the chemical industry, in particular for calibrating a pump in operation without interrupting the supply of components.

Целью изобретени вл етс повышение точности калибровкиоThe aim of the invention is to improve the accuracy of calibration

На чертеже изображена схема предлагаемого устройства.The drawing shows a diagram of the proposed device.

Устройство дл калибровки дозировочного насоса состоит из расходной емкости 1, измерительной емкости 2, подключенных к дозировочному насосу 3, верхнего 4 и нижнего 5 сигнализаторов уровн , таймера 6, делител 7, индикатора 8, первого, второго и третьего сумматоров 9 - 11, измерите2A device for calibrating a dosing pump consists of a supply tank 1, a measuring tank 2 connected to the dosing pump 3, the upper 4 and lower 5 level gauges, timer 6, divider 7, indicator 8, first, second and third adders 9-11, measure 2

ступают сигналы с блока 17 ввода концентрации и задатчика 18 концент рации, а на его выходе формируетс сигнал, пропорциональный их разности , который после умножени в тре- тьем умножителе 16 на коэффициент поступает на третий вход второго сумматора 10. Полученна поправка во втором сумматоре 10 суммируетс выходным сигналом заДатчика 21 плот ности. Выходной сигнал второго сумматора 10 поступает на вход второго умножител 15 на коэффициент, в KOT IT ром умножаетс на объем измерительной емкости. 2, отобража вес жидкос ти в последней. В делителе 7 сигнал с выхода второго умножител 15 на коэффициент делител на выходнойThe signals from the concentration input unit 17 and the concentration setter 18 are stepped, and a signal is generated at its output proportional to their difference, which, after multiplying in the third multiplier 16, by a factor, goes to the third input of the second adder 10. The resulting correction in the second adder 10 is summed output signal of density sensor 21. The output of the second adder 10 is fed to the input of the second multiplier 15 by a factor; in KOT IT, the rum is multiplied by the volume of the measuring capacitance. 2, display the weight of the fluid in the latter. In divider 7, the signal from the output of the second multiplier 15 to the ratio of the divider to the output

10ten

л 12 температуры,задатчика 13 темпе- 2о сигнал таймера 6, пропорциональный ратуры,первого, второго и третьего умножителей 14 - 16 на коэффициент, блока 17 ввода концентрации, задатчи- ка 18 концентрации 18, блока 19 управлени , запорного клапана 20 и задатчика 21 плотности жидкости.l 12 temperature, setpoint 13 tempo-2o signal of timer 6, proportional to the temperature of the first, second and third multipliers 14–16 per coefficient, concentration input unit 17, concentration 18 gauge 18, control unit 19, shut-off valve 20 and setting knob 21 fluid density.

Устройство работает следующим образом .The device works as follows.

Перед калибровкой запорный клапан ,20 открыт и уровень жидкости в измерительной емкости 2 равен уровню жидкости в расходной емкости 1. При подаче сигнала на блок 19 управлени последний закрывает запорный клапан 20 и дозировочный насос 3 выкачивает жидкость из измерительной емкости 2. При достижении верхнего сиг нализато- ра 4 уровн с него подаетс сигнал на включение таймера 6,а при достижении : нижнего сигнализатора 5 уровн с него подаетс -сигнал на выключение таймера 6, одновременно блок 19 управлени открывает запорный клапан 20, Сигнал, пропорциональный температуре в измерительной емкости 2с измерител 12 температуры, поступает на первый сумматор 9, на второй вход которого поступает сигнал от задатчика 13 температуры. Полученна разность в первом умножителе 14 на коэффициент умножаетс на посто нньй коэффициент, формиру поправку на изменение плотности от изменени температуры. При дозировании бинарных и псевдобинарных смесей формируетс поправка на изменение плотности, вызванное изменением концентрации: на входы третьего сумматора 11 повремени истечени жидкости из измерительной , емкости 2. Сигнал с выход делител 7, соответствующий произво дительности дозировочного насоса, 25 поступает на индикатор 8.Before calibration, the shut-off valve 20 is open and the liquid level in the measuring tank 2 is equal to the liquid level in the supply tank 1. When the signal is sent to the control unit 19, the latter closes the shut-off valve 20 and the dosing pump 3 pumps out the liquid from the measuring tank 2. When the upper signal reaches - At level 4, it is signaled to turn on timer 6, and when it reaches: the lower level 5 signaling device, signal is given from it - signal is turned off to timer 6, and at the same time, control unit 19 opens shut-off valve 20, signal, oportsionalny temperature measuring capacitance 2c temperature meter 12 is input to the first adder 9, a second input of which receives the signal 13 from the setpoint temperature. The resulting difference in the first multiplier 14 is multiplied by a constant by a constant coefficient, forming a correction for the change in density from the change in temperature. When dosing binary and pseudo-binary mixtures, an amendment to the density change caused by a change in concentration occurs: the inputs of the third adder 11 cause the fluid to flow out of the measuring tank 2. The signal from the output of the divider 7, corresponding to the performance of the metering pump, 25 goes to the indicator 8.

Claims

1. Dose Calibrator

3Q of a leveling pump containing a communicating measuring capacitance with upper and lower level alarms connected to the inputs of the timer and control unit, and the supply capacitance,

35 connected to the dosing pump through a shut-off valve connected to the outlet of the control unit, differently in order to improve the calibration accuracy in

40 he entered the temperature meter temperature controller, density generator, divider, two multipliers per coefficient, two adders and an indicator, and the input temperature meter

45 rounds connected to the measuring capacitance, output - sequentially through the first input of the first adder and the first multiplier to the coefficient with the first input of the second adder, you

50 the latter's stroke is connected via a second multiplier by a factor to the first input of the divider, the second input of which is connected to the timer output, the output to the indicator, and the setpoint generator

55 temperatures and a density adjuster are connected to the second inputs of the first and second adders, respectively.

2

The signals from the concentration input unit 17 and the concentration setter 18 are stepped, and a signal is generated at its output proportional to their difference, which, after multiplying in the third multiplier 16 by a factor, goes to the third input of the second adder 10. The resulting correction in the second adder 10 is summed with output signal of the density sensor 21. The output of the second adder 10 is fed to the input of the second multiplier 15 by a factor, in KOTO-T the rum is multiplied by the volume of the measuring capacitance. 2, displaying the weight of the fluid in the latter. In divider 7, the signal from the output of the second multiplier 15 to the ratio of the divider to the output

0

2o timer signal 6 proportional

the outflow time of the liquid from the measuring tank 2. The signal from the output of the divider 7, corresponding to the performance of the metering pump, 25 is supplied to the indicator 8.

Invention Formula

1. A device for calibrating a dosage pump, containing communicating measuring capacitance with upper and lower level switches connected to the inputs of the timer and control unit, and the supply capacitance,

35 connected to the dosing pump through a check valve connected to the outlet of the control unit, about the aphid, so that, in order to improve the calibration accuracy,

40 he entered a temperature meter, temperature setpoint, density setter, divider, two multipliers per coefficient, two adders and an indicator, the input of the temperature meter connected to the measuring capacitance, the output - sequentially through the first input of the first adder and the first multiplier per coefficient with the first input the second adder, the output of the latter is connected via a second multiplier by a factor to the first input of the divider, the second input of which is connected to the timer output, the output to the indicator, and the setpoint generator

55 temperature and the unit density is connected to the second inputs of the first and second adders, respectively.

2. The device according to claim 1, about the t and which is the fact that, in order to improve the calibration accuracy of the metering pump for binary and pseudo binary mixtures, a concentration input unit, a concentration setter, a third adder and a third multiplier are entered into it the coefficient, the concentration input unit and the concentration setting unit are connected to the inputs of the third adder, the output of which is connected via the third multiplier to the coefficient with the third input. in the second adder.

Editor Y. Sereda

Compiled by A.Ivanov Tehred M.Didyk

Order 6356/27 Circulation 694 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

. Production and printing company, Uzhgorod, Projecto st., 4.

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