SU1537718A1 - Arrangement for controlling filament-forming process in multiple-unit spinning machine - Google Patents

Abstract

The invention relates to the automation of chemical-technological processes. The purpose of the invention is to improve the accuracy of control. The device regulates the supply of cooling air through the machine and workplaces with regard to the supply of melt to workplaces, and also ensures the priority maintenance of workplaces. 2 Il.

Description

The invention relates to the automation of processes, in particular, to control devices for the cooling of filaments molded on multi-spinning machines.

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

FIG. 1 shows a block diagram of the device; in fig. 2 — The schedule is not defined by the service priority.

The diagram shows the air supply manifold 1, the actuator 2 that regulates the air supply to the machine, the air supply actuator 3 for each location of the machine, the die 4, the blower shaft 5, the exhaust air temperature sensor 6, the keys 7 and 11, the number of charged counter 8 places, averaging unit 9, comparison unit 10, control action shaping unit 12, workplace service priority determining unit 13, pressure regulator 14, speed regulator 15, melt supply indicator 16, h and package 17.

The output of the temperature sensors 6 are connected respectively to the inputs of the keys 7 and the comparison unit 10, the control inputs of the keys 7 are connected to the outputs of the melt supply indicators 16, the output of each of which is connected to the input of the counter 8 of the number of filled places, the output of which is connected to the input of the averaging unit 9, the output of which is connected to the second input of the unit 10. The output of the latter is connected to the input of the key 11, the second input of which is connected to the output of the melt supply indicator 16. The outputs of the keys 11 are connected to the input of the block 12, the outputs of which are connected to the inputs of the block 13, the pressure regulator 14 and the speed regulator 15.

The device works as follows.

The polymer melt extruded from the die 4 forms a drink cooled in the stream of air supplied through the blender 1. After cooling, the thread

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ate

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It is supplied to the package 17. The change in the temperature of the exhaust air is monitored by the temperature sensors 6, and the flow of the melt is monitored by the indicator 16, which Normalizes the logical signal "Ь, 1 - in the presence of the melt and 6, 0 - in its absence. The signals of the sensors 6 and 16 are fed to the inputs of the key 7, which, if there is J logical signal 6 1, outputs the signal of the current temperature value at the given place T- to the input of the averaging unit 9, where the average temperature value over the unit T is calculated depending on the number of filled places supplied by the counter 8. Next, the signal from the averaging block 9 is fed to the input of the comparison block 10, where the current temperature value T: is compared with the average for the T machine and the DT-T - T - deviation is calculated. Signals from block 10 come through the keys 11 to the input block 12, in which the program processes information and issues 2 signals to block 13 and controllers 14 and 15. In the absence of one of the signals from sensor 16 (i.e., & 0, key 7 is closed), a logical signal is generated 1 and take into account the absence of one of the signals, while O appears at the input of averaging block 9, i.e. the current temperature value at a given location is excluded.

In block 12, the input information is processed; it gives recommendations on controlling the cooling process of the thread. The calculation of the control actions for the average value of the temperature of the wake of the air flow throughout the vehicle and at each spinning location is described by the system of equations

LR (K, (TS. - MISP);

dVM K (T j Ts,)

de DR; - the magnitude of the pressure adjustment of the air supplied to the i-th spinning machine (i 1, 2, ..., 6), kgf / m2; dV, - is the magnitude of the adjustment of the position of the air inlet flap j-ro at the i-i i point of the machine (J 1,2, ..., 18) kgf / m2;

T is the temperature of the cocurrent airflow j-ro of the spinning wheel with t a i i-and the machine, C;

Q p 5

five

five

0

five

Tu.- average temperature of the cocurrent air flow on the 1st machine, ° С;

 temperature setpoint;

K. ,, K 2 - proportionality coefficients, kgsDm2 ° С).

In addition, in block 12 data array. sorted as follows. Extreme absolute values of ЈV are selected from the array and priority is assigned to it (Fig. 2). In block 13, the number of the priority serviced location is displayed. After the operator completes the recommendations in the jth place, the above procedure is repeated by block 12, and in block 13 the number of the next priority service number is indicated.

Claims (1)

Invention Formula A control unit for the spinning process on a multi-seat spinning machine, containing exhaust air temperature sensors installed at the spinning machine's workplaces, each of which is associated with the first input of the corresponding comparison unit, a counter, an output connected to the first input of the averaging unit, and a control shaping unit influences connected through the appropriate regulators with the executive mechanisms of the cooling air supply to the spinning machine and to the workplaces characterized by that, in order to improve the control accuracy, it is equipped with melt flow sensors and two keys installed at the workstations of the spinning machine, as well as a work order priority determining unit, each melt flow sensor connected to the control inputs of the first and second keys, the input of each first key is connected to a respective sensor of the exhaust air temperature, and the outputs of the first keys through the averaging unit are connected to the second inputs of the respective comparison units, Exit via respective second switches connected to the inputs forming unit actuating impacts, wherein sensors the melt flow rate is connected to the counter inputs, and the block for determining the priority of servicing the workplaces under 15377186 keys to the corresponding output of the block of formation of control actions. 1 / z1PPGr | 1 Rasmab V