SU500520A1

SU500520A1 - Regulator of concentration of treatment solution for a group of injection molding machines

Info

Publication number: SU500520A1
Application number: SU2082750A
Authority: SU
Inventors: Иван Павлович Казанцев; Юрий Николаевич Ястремский
Priority date: 1974-12-08
Filing date: 1974-12-08
Publication date: 1976-01-25

Description

1one

Изобретение относитс к автоматизации технологических процессов химической цромышленности и предназначено дл регулировани концентрации обрабатывающего раствора в производстве целлофановой пленки. The invention relates to the automation of technological processes in the chemical industry and is intended to regulate the concentration of the treatment solution in the production of cellophane film.

Известен регул тор дл управлени процессом формовани целлофановой пленки, содержащий датчикконцентрации, регулирующий блок, исполнительные механизмы, дат:чики обрыва пленки, переключающие устрой;Ства и задатчик.A known regulator for controlling the process of forming a cellophane film, which contains concentration sensors, a regulating unit, actuators, sensors: breaks of a film, switching devices, STV and setting device.

: Недостатком такого устройства вл етс сложность его реализации и ограниченные функциональные возможности. Действительно дл группы из четырех или п ти литьевых мащин, работающих параллельно (а это имеет место на всех крупных химкомбинатах), оно представл ете, сложную и громоздкую конструкцию, кроме того, оно не учитывает : The disadvantage of such a device is the complexity of its implementation and limited functionality. Indeed, for a group of four or five casting machines operating in parallel (and this is the case in all large chemical plants), it is a complex and cumbersome design, and it also does not take into account

возможного изменени производительности (скорости) отдельных машин, в результатеpossible changes in the performance (speed) of individual machines, as a result

I чего компенсаци возмущений будет неполной , а точность регулировани - недостаточной .I of which the disturbance compensation will be incomplete, and the adjustment accuracy is insufficient.

Предложенный регул тор, с целью повышени точности регулировани , снабжен датчиками производительности литьевых мащин, сумматором и блоком умножени , выход которого св зан с исполнительным механизмом , а входы подключены к выходу регулирующего блока и через сумматор к выходам датчиков производИ1ельности литьевых мащин .In order to increase the control accuracy, the proposed controller is equipped with performance sensors of injection molding machines, an adder and a multiplication unit, the output of which is connected to the actuator, and the inputs are connected to the output of the regulating unit and through the adder to the outputs of the sensors of the production of injection molding machines.

Сущность изобретени по сн етс чертеSUMMARY OF THE INVENTION

М - формовочныеM - molding

жом, где М, bagasse, where M,

барки литьевых мащин, на которых установлены датчики скорости (производительности) D., В, .-..Dbarge casting machines, which are equipped with speed sensors (performance) D., B, .- .. D

„, ... выходы которых через„, ... which exits through

1one

сумматор 1 и преобразователь 2 подключены к блоку умножени 3, второй вход которого через регулируют /; блок 4 св зан с датчиком .5 концент ации раствора. Исполнительный механизм 6, управл емый блоком y т oжeии 3, г .оздействует на смеситеЛ1-, 7 .oBO4Horo раствора,adder 1 and converter 2 are connected to multiplication unit 3, the second input of which regulates /; block 4 is connected to the solution concentration sensor .5. The actuator 6, controlled by the unit of y t of the joint 3, acts on the mixer L1-, 7 .oBO4Horo solution,

оabout

Claims

1 (hum rr works as follows o6jio3o;;. I ,, 4 ч ил и;). :) hm-: x machines in the interaction of viscose with forming solution. The process of preparing the molding solution is characterized by considerable inertia and large transport aids. In steady state, when the productivity (speed) of the machines is constant, the regulating unit 4, maintaining the concentration of the solution at a predetermined level, generates and outputs a control signal to the actuator 6 through the multiplication unit 3, providing. Necessary acid dosage. At the same time, the multiplier through converter 2 receives a signal of the sum of torus 1, corresponding to the total performance of the machines (load signal). When changing the speed or when the individual machines (or all) are stopped, the multiplication unit provides full compensation of the disturbance due to the load. Indeed, it is clear from the equation of the intelligent unit P. P., RO (where F is the signal from the output regulator; P., is the signal from the load converter) that the signal P. portionion - ale--: signal-in P „(load signal); Any values of the S regulator P This ensures that the change in the signal at the acid dosing valve corresponds to the change in the signal on the performance (load) of the machines. In addition, the inclusion of a multiply block in the control system greatly simplifies the process of setting up the system, since the matching of the load signals with the dosage of the acid occurs automatically with the help of the control block. This regulator can find the use of D1SH of adjusting the concentrations of treating solutions with high accuracy in the production of, for example, cellophane film, on equipment with a high productivity. Claims The regulator is the CEE concentration of the treatment solution for a group of injection molding machines, which contains a concentration sensor for the treatment solution, a regulating unit and an actuator that is characterized in that it is equipped with an injection performance sensor g-lamin, an adder and a multiplication unit. The output of which is connected to execute 6l. iHbTX-i mechanisms, and the inputs to the output to the output control: 1 of the block and through the adder to the outputs of the performance sensors casting:; machines.

n

% L

l "

Ms

five

Ol2

1 „LL /

Sh