SU1730235A1 - Control device for fibre feed to the group of carding machines - Google Patents

Abstract

SUMMARY OF THE INVENTION: The device comprises: 1 feeder, 7 carding pouches, 1 pneumatic line, 4 capacity sensors, 1 control unit, 7 make contacts of carding machine starters, 1 capacity regulator, 1 drive, 1 pair of exhaust rollers. 5 il. 1 tab.

Description

The invention relates to the textile industry and can be used on bunker food systems in cotton and wool.

A device comprising a hopper with an adjustable electric drive of exhaust cylinders, a speed setter, a timer, a control unit for the carding machines, a fan drive, a capacity sensor installed in a reverse air line, a level and density sensor, a reference element is known. The device controls the fiber supply and pressure in the system when the number of working carding machines changes according to the readings of the number of working FM, the number of fibers in the return air line, the level and density. The main disadvantage of the prototype device is the low control accuracy when using it on dead-end fiber distribution lines when there is no return air line.

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

A device containing a feeder, the discharge part of which is equipped with an adjustable drive, input connected to the output of the capacity controller, and a dead-end air flow performance sensor, located between the outlet body of the feeder and the hoppers of the carding machines, each of which is equipped with its state unit, and the control unit . Moreover, it is equipped with additional performance sensors, which are installed before the latter in the course of fiber movement by carding machines, and the control unit contains an address decoder, a switch, a comparator, AND and OR logic elements, an electric filter, counters, a trigger, a register, a D / A converter and series-connected generator pulses, a decoder and drivers, with the outputs

WITH

about

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from the next

switches are connected to the first inputs of the corresponding logic elements AND, the second inputs of which are connected to the corresponding outputs of blocks of the state of the carding machines, the outputs of logical elements AND are connected through the logical element OR to the input of the first counter, the control input of which is connected to the output of the senior digit of the decoder , and the output is through a register with a digital-to-analog converter and a comparator combined by inputs, and the control input of the register is associated with the output of the high-order decoder, and the decoder is the inputs are combined with the second inputs of the corresponding I logic elements, and the outputs with the corresponding control inputs of the switch, the output of which is connected to the input of the electric filter, and the switch inputs are connected to performance sensors, the trigger inputs are connected to the corresponding inputs of the comparator, and the outputs a digital-analog converter, a trigger, and an electrical filter are connected to the inputs of the performance controller.

Figure 1 shows the block diagram of the device; Fig. 2 shows an embodiment of the control unit; FIG. 3 shows an embodiment of an address decoder; figure 4 - unit device 7; figure 5 shows the timing diagram of the device.

The device includes a feeder 1, the fibrous material from which is supplied to the carding machines 2 through a dead-end pneumatic supply 3.

The amount of fiber supplied to each subsequent along the movement of the technological material of the carding machine 2 is recorded by the capacity sensors 4 installed in the pneumatic system between adjacent bunkers. Of all four sensors 4 installed in figure 1, in each specific production situation, regardless of the number and numbers of working machines 2, only one device works in the device, and it is mandatory installed before the last working card 2.

Productivity sensors 4 are numbered 1, 2, 3, 4. The outputs of productivity sensors 4 are connected to the control unit 5, to which contacts 6 of the actuator of each carding machine 2 are connected. In the switched on state of the carding machine 2 contact 6 is closed. Each pin 6 has its carding number. The first output of the control unit 5 is connected to the capacity control knob of the capacity regulator 7, the second output of the control unit 5 is connected to the switching regulator output element 7, the third output of the control unit 5 is connected to the performance regulator comparison element 7. The output of the capacity regulator is connected to the feed motor 8, causing the outlet organs of the feeder 1 to rotate.

The control unit 5 consists (see FIG. 2) of the pulse generator 10, the signals from which are fed to the clock input of the first counter 11, the counting module of which is equal to the number of carding machines 2 per line. The digital code from the output of the first counter 11 is fed to the single input of the decoder 12, the purpose of which is the time sweep of information. A single signal at the output of the decoder, the code of which is dialed at its address inputs. In this turn-on, a single pulse appears successively at each of the outputs and, after the end of the cycle, returns to the first output. The outputs of the decoder 12 through the drivers 13 are connected to the first inputs of the elements AND 14, the second inputs of which receive signals from contacts 6. All elements AND 14 are connected to the first element OR 15, the output of which is connected to the clock input of the second counter 16. The output signal of the second counter 16 as a binary is connected to the register 17 and is fed to the inputs of the comparator 18 and the digital-analog converter 19. The outputs A B and A of the comparator 18 through the second element OR 20 are connected to the S input of the trigger 21. The output of the comparator 18 is connected to the R input trigger pa 21. In addition, pins 6 carding machines 2 with the numbers 4, 5, 6, 7 are connected to the address decoder 22. The outputs of the address decoder 22 are connected to the V-inputs of the switch 23, the inputs X of which are connected to the sensitive elements of the capacity sensors 4 installed in the pneumatic line 3 according to FIG. The outputs of the switch 23 are combined and connected to the electric filter 24, where the signal of the required sensor 4 is converted into a control signal of the performance regulator 7, Inverter 25 connects the R-input of the second counter 16 to the output of the decoder 12 and serves as a delay element.

The address decoder 22 (FIG. 3) is a decoding element of the address of the performance sensor 4 being included in operation.

The address decoder 22 consists of the first inverter 26, the second inverter 27, the third inverter 28, the four-input element I 29, the three-input element I

30, two-input counter And 31. The signals to the inputs of the inverters 26, 27 and 28 come from the contacts 6 carding machines 2 numbers 5, 6 and 7, respectively. Pin 6 of the combing machine 2 number 4 is connected to the input of the four-input element And directly, contact 6 of the combing machine number 5 is connected to the input of the three-input element I 30, contact 6 of the combing machine 2 number b is connected to the input of the two-input element And

31, In addition, the outputs of the first 26, second 27 and third 28 inverters are connected to the inputs of the four-input element And 29, the outputs of the second 27 and third 28 inverters are connected to the inputs of the three-input element And 30, and the outputs of the third inverter 28 are connected to the input of the two-input element And 31 Contact 6 of the combing machine 2 number 7 is also connected directly to the switch 23, and elements 29, 30, 31 are mine. The outputs of the elements 29, 30, 31 are connected to other inputs of the switch 23.

The productivity regulator 7 (see FIG. 4) has a performance master

32, reference element 33 and speed controller 34.

The device works as follows. For example, in the line all carding machines 2 are working. At the same time, all contacts of 6 carding machines 2 are closed. The pulse generator 10 produces at its output the pulses represented by the upper graph in FIG. 5. The first counter 11 converts these pulses into a binary code corresponding to the pulse number of the generator 10. In this case, the first counter 11 is made with a counting module of seven, so after the seventh pulse the output code of the first counter 11 goes to zero and the counting starts again. The binary code from the output of the first counter 11 is fed to the input of the decoder 12, which expands the pulse sequence to seven outputs so that a single signal is present at a given time on this output, the code of which is assembled on the input terminals of the decoder 12. This mode is shown in FIG. five. The drivers 13 are connected to each output of the decoder 12 and generate one short pulse at the time of the appearance of a single signal from the output of the decoder 12. Thus, it is possible to form a sequence of short pulses shifted in time relative to each other. The inputs to the inputs of elements AND 14, the signals from the output of the formers are multiplied by the signals from the contacts of 6 carding machines 2. If the contact 6 of the carding machine is closed, the input element I

signal is a logical unit. Therefore, the pulse of the driver 13 passes to the input of the first element OR 15. If all contacts 6 are closed, all the pulses from the drivers will go to the first element OR 15, and the pulse sequence presented in Fig. 5 will appear as seven pulses at the output of the element (Article 16 C). These pulses are counted by the second counter 16. The code at the output of the second counter 16 is stored by register 17 upon the arrival of a pulse from the last output of the decoder 12 and stored in register 17 until the next pulse arrives

5 records. Here, due to the inverter 25, the second counter 16 is zeroed and the counting starts again.

The output code of register 17 is updated after seven pulses of the generator 10, and if the number of working carding machines 2 remains seven, all the machines are working, the code in register 17 does not change. The input to the digital-to-analog converter 19, this code produces

5 at the output of the DAC is an analog signal proportional to the number of operating machines. In our case, with seven machines in a line, this signal corresponds to such a setting voltage, which through the regulator

0 performance 7 sets the maximum rotational speed of the feed engine 8.

Analyzes the operation of the comparator 18. Its purpose is to stop the line together with the second element OR 20 and the trigger 21 if the number of working machines 2 in the line is less than four. In this case, all the machines work, therefore, at the output of the Stop line

0 flip-flop 21 must have a logical one. The signal at the input A of the comparator 18 corresponds to the code of seven. The signal at the input of the comparator 18 is always equal to four. Naturally, 7 4 and at the entrance AB

5 comparator appears unit. Through the second element OR 20, this unit arrives at the S input of the trigger 21. At the same time, the input R of the trigger 21 is zero, since condition A B is not fulfilled. With

0 such a combination of input signals, the trigger is set to one state, which is required by the logic of the considered node. Lini does not stop.

5 Consider the effect of elements intended to switch performance sensors. The condition of the analyzed part of the circuit is the connection to the electrical filter 24 of that capacity sensor 4, which is according to

Table 1 is before the last one in the course of movement of the material process flow by the carding machine 2. In this case, the final carding machine 2 is numbered 7, therefore, it is necessary to connect the sensor 4 to the filter 24 (see Fig. 1). It happens like this. At the input of the decoder 22 of the address from the contacts 6 receives the code 1111, corresponding to the work of all four last machines 2 in the line. The signals from pins 6 from carding machines 2 nos. 5, 6, 7 are inverted by the first 26, second 27 and third 28 inverters and block the four-input element AND 29, the three-input element And 30, the two-input element And 31. Only output 4 of the decoder 22 unit Arriving at the corresponding input V of the comparator 23, this unit connects the capacity sensor 4 at number 4 to the input of the electric filter 24. The task of the unit 24 is to send a feedback signal on the performance element 33 to the output to support the final working card 2 of the required level of performance. The remaining three capacity sensors 4 are disconnected from the electric filter 24, since there is a logical unit at the inputs V of the switch 23 of the channels of these sensors.

Suppose card car 2 at number 5 has stopped. In this case, its contact 6 is opened. This will lead to the fact that, firstly, not all seven pulses of the formers 13, but only six arrive at the input of the first element 15, because the pulse from the output 5 of the decoder 12 will not miss the element 15 of the card, since from its inputs there will be a zero signal. Therefore, the limit code formed at the output of the second counter 16 before the arrival of the reset pulse will be six, this code will register register 17. All this will result in the output of the digital-to-analog converter 19 of the analog signal corresponding to the specified power level of the feeder 1. Operation the comparator 18, the second element OR 20, and the trigger 21 does not change, since 6 4. Secondly, the code 1011 will be received at the input of the address decoder 22, where the appearance of O corresponds to the number 5 card off. nenie not lead to a change in the output code decoder 22, since all the elements and this site will be blocked. The previously operating performance sensor 4 number 4, installed in front of the carding machine 2 number 7, will remain in operation.

Such a situation will correspond to the shutdown of one of any carding machine 2 except the final one, indicated in FIG. 1 at number 7.

If the carding machine 2 at number 7 stops, the operation of the second counter 16, register 17, DAC 19, comparator 18 and trigger 21 will not change, and the address decoder 22 will work differently.

If carding machine 2 at number 7 is stopped, code 1110 appears at the output of address decoder 22. At that, output 4 of address decoder 22 is zeroed out. A unit appears at its output 3, which is the output of the two-input element And 31, its outputs 1 and 2 have a zero potential. Therefore, the switch 23 connects to the electric filter 24 a sensor 4 numbered 3 installed in front of the penultimate card 2 numbered 6. Otherwise, the operation of the device circuit is not disturbed.

If two and three carding machines 2 are turned off, the operation of the circuit will be similar with the only difference that register 17 will store the digital code Py or Four for the write cycle, corresponding to the number of working carding machines. At the same time, the digital-to-analog converter 19 produces at its output an analog signal corresponding to the performance of the feeder 1. This signal changes the voltage at the first output of the control unit 5 so that the rotation frequency of the feed motor 8 corresponds to the required performance. Since the number of working carding machines is more than four, the operation of the elements 18, 19, 20 does not change and the line does not stop. The operation of the address decoder 22 will be similar to the cases discussed above, the algorithm for the operation of the decoder is shown in the table.

As can be seen from the table, the sensor that is installed before the last working carding machine 2 as the technological product advances along the pneumatic line 3 is connected to the filtration unit 24.

And finally, consider the case when there are three carding machines in operation.

At the same time, at the output of the second counter 16, a code of three is formed. This code is stored by register 17 and fed to the input of comparator 18. Since the 3 outputs A B and A B of the comparator 18 generate zero signals, which at the output of the second element OR 20 form a logical zero signal. At output A of comparator 18, we have logical units /. Such a combination at the inputs of the flip-flop 21 causes its transfer, at the output of the flip-flop 21 a logical zero is formed and the line is turned off as an alarm, and the number of idle carding machines 2 does not matter.

The use of such a device makes it possible to equip a performance regulator with a dead-end supply system, which improves the control accuracy and provides an economic effect.

Claims (1)

Claims An apparatus for regulating the supply of fiber to a group of carding machines, comprising a feeder, the discharge member of which is equipped with an adjustable drive, an input connected to the output of the capacity controller, and a dead-end pneumatic line with a capacity sensor located between the outlet body of the feeder and the hauls of the carding machines, each of which is equipped with its state unit, and a control unit, characterized in that, in order to increase the control accuracy, it additionally has three sensors which are installed before the last in the course of fiber movement by carding machines, and the control unit contains an address decoder, switch, comparator, logical elements AND and OR, electric filter, counters, trigger, register, digital-analogue converter, pulse generator, decoder and drivers, and the outputs of the drivers are connected to the first inputs of the corresponding logic elements AND, the second inputs of which are connected to the corresponding outputs of blocks of the state of the combing machines, the outputs of the logic elements AND are connected through the logical element OR to the input of the first counter, the control input of which is connected to the output of the higher bit the decoder, and the output is through the register with A digital-analog converter and a comparator are combined at the inputs, and the control input of the register is associated with the high-order output of the decoder, and the address decoder of the inputs is combined with the second inputs of the corresponding AND logic elements, and the outputs with the corresponding control inputs of the switch, the output of which connected to the input of the electric filter, and the inputs the switch is connected to the performance sensors, the trigger inputs are connected to the corresponding outputs of the comparator, and the outputs of the D / A converter, the trigger and the electrical filter connected to the inputs of the performance controller, while the pulse generator, the second counter, the decoder and the drivers are connected in series. I from contacts 6 S4 Jp Hg g l Fy fHi-JLJUuiJijruuui rb L ppfi-tb Forp.13 P I4w./j w.; j one Jlj P P