SU744490A1 - Device for dividing matter flow - Google Patents

Description

(54) DEVICE TO SEPARATE A FLOW

I

The invention relates to automation of production processes and can be used in the oil-extracting, petrochemical, chemical, food and other industries;

A device for separating the flow of a substance is known, which contains flow meters connected to the selector and, in each control box, a divider, elements AND, and an execution mechanism 1 are connected to the output of the selector.

In the known device, the regulation of the distribution of the substance consumption by the flows is carried out according to the total consumption measured once per control cycle for all the flows. At the same time, when regulating the flow of a substance, the total consumption of which changes quite rapidly with time, the regulation of some subsequent flows will be inadequate to the total consumption, i.e. will be inaccurate.

The purpose of the invention is to improve the accuracy of the device.

This goal is achieved in that the device contains a trigger, an OR element, and a reversible SUBSTANCE in each control channel.

the counter, the first input of which is connected to the output of the corresponding flow meter, the second input - with the output of the divider, the first outputs - with the trigger inputs, and the second outputs - with the inputs of the OR element, the output of which is connected to the first inputs of the AND elements, the second inputs connected to the corresponding outputs of the trigger , and the outputs of the elements And are connected to the actuator;

The drawing shows a diagram of the device

10 to separate the substance.

The device consists of flow meters i, selector 2, reversible counters 3, dividers 4, elements 5 OR, triggers 6, elements 7 AND, and actuators 8.

15

The outputs of the flow meters 1 are connected to the inputs of the selector 2 and reversible meters 3. The output of the selector 2 is connected to the inputs of dividers 4, the outputs of which are connected to the inputs of reversible meters 3. e) The corresponding outputs of meters 3 are connected to the inputs of elements 5 OR and triggers 6. The outputs of elements 5 OR n triggers 6 are connected to. the corresponding inputs of elements 7 And, the outputs of which are connected to the inputs of: actuators 8.

The device works as follows. Information on the flow rate of a substance over each measured flow, in the form of a sequence of electrical signals from the outputs of the flow meters 1, is fed to the corresponding inputs of the selector 2, which is the time separation of signals. the output of the selector 2, the sum- rium sequence of signals, goes to the inputs of the distributors 4, the division ratio of which is unambiguously related to the corresponding value of the substance flux relative to the total flow.

The outputs of the dividers 4 are connected to the computed oiHM. We enter the corresponding reversible counters 3. The summing inputs of the counters 3 receive a sequence of output signals of the corresponding flow meter 1. Depending on the input of the signals to the inputs of the counter 3, the counter can take states; ppm I to 1.

The state of the counter | & in 3 from j to k characterizes the established mode of operation, i.e., the mode when the flow rate of the substance for each flow corresponds to the set one and the executive mechanisms 8 that regulate the distribution of the respective flows are turned off, since the output

the signals Jk of the states of the counters 3, through

element 5 OR arrive at the first inputs of the corresponding elements 7 AND and block the flow of output signals from the trigger 9, connected to the second inputs of elements 7 AND to control the actuators 8 of the corresponding flow ...

In the case of the unsteady mode of operation, the summing and subtracting inputs of the reversing meters 3 receive an unequal number of signals, since the total consumption of the substance remains constant at the consumption of the substance along the corresponding flow that does not correspond to the current. In this case, the states of the reversible counters 3 may take one of the extreme values. The output signals of this medium effect: are applied to the corresponding inputs of the flip-flops 6, which, through the corresponding elements 7, affect the actuators 8 of the corresponding flow, adjusting its flow rate to a predetermined value.

In the case of a change in the total flow, for example, a change in flow, flow control is carried out as follows.

Reducing the total flow will lead to the fact that the expenditure of the substance rio corresponds to the pot6k1G level, but the flow will be minimally reduced, the distribution of which is maximum relative to the total flow. Due to the redistribution of flows, its consumption will increase. Therefore, the use of 744490

The bearing mechanism 8 of the flow, after the redistribution of flows, will have the greatest impact on the reduction of this flow, and the rest (e mechanisms 8, respectively, on the increase in flows.

A decrease in the maximum flow will lead to an increase in the next maximum in relation to the total flow, the effect of its decrease will increase, and so on. The oscillatory process in the device occurs until

threads does not match the specified.

Similarly, the operation of the device also occurs in the case of an increase in the total flow, with the difference that the effect on the actuators 8 is opposite in effect when the total flow decreases, and flow regulation begins with a flow that is minimal in relation to the total flow.

Given the number of states of the reversible counter 3 for the steady state, the accuracy of the flow distribution and the frequency of activation of the adjustment mechanisms are adjusted.

To compensate for hydrodynamic disturbances in parallel-running pipelines, the flow through one of them is not controlled.

The proposed device, in contrast to the known, allows continuously separating the flow of a substance depending on the sum of the consumption of marnos, which reduces the inertia of the device and consequently increases the accuracy of the separation every time.

Claims (1)

Invention Formula A device for dividing the flow of the CTBa containing flow meters connected to the selector and in each control channel connected to the output of the selector a divider, elements AND an actuator, characterized in that, for ndBHiueHHH accuracy, the device contains in each control channel a trigger, element AND CHI and reversible counter, first the input of which is connected to the outputs of the corresponding flow meter, the second input - with the output of the divider, the first outputs - with the trigger inputs, the second outputs - with the inputs of the OR element, the output of which is connected to the first inputs of the AND elements, the second inputs of the connector with the corresponding outputs of the trigger, and the outputs of the elements And connected to the actuator. Information sources, taken into account in the examination I. USSR author's certificate in application number 2438195 / 18-24, cl. G 05 D 7 / Ov, 07.27.1977. : I i i li