SU1321699A1 - Device for controlling metering device for glass charge loose components - Google Patents

Abstract

The invention relates to the preparation of bulk homogeneous mixtures with a predetermined ratio of the constituent materials, can be used in the glass industry for the preparation of glass batch and allows to increase the control accuracy. The device contains a metering device 1, containing 2 overhead and weighing 3 bunkers, loading vibrators 4 and unloading 5, loading 6 and unloading 7 gate valves, loading 8 and unloading 9 valves with calibrated holes, scales 10 with zero weight sensors 11, accurate unloading 12, accurate loading 13, gained weight 14, sensor 15 for the final position of the locking loading flap, sensor 16 for the final position of the loading unloading damper, loading valve vibrator starters 17, unloading vibrator 18, loading gate 19 with calibers a bore, a loading gate valve 20, a discharge valve 21 with a calibrated hole, a discharge gate valve 22, a dosing unit 23, an emergency diagnostics unit 24 and a prediction time unit 25 — loading and unloading times. 3 il. (L od IN9 O) WITH SO

Description

113

The invention relates to the preparation of bulk homogeneous mixtures with a predetermined ratio of constituent materials, can be used in the glass industry for the preparation of glass batch and relates to the field of automation of dosing processes for bulk materials, glass batch.

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

Fig, 1 shows a diagram of the device; Fig. 2 shows diagrams of dosing units and prediction of loading and unloading times; on fig.Z diagram. unit diagnosis of emergency situations.

The device for controlling the dispenser of the loose components of the glass rod consists of the dispenser 1, which contains its overhang 2 and the weight 3 bunker Vibrators loading 4 and unloading 5 with actuators,

loading 6 and unloading 7 gate valves with actuators, loading 8 and unloading 9 valves with a calibrated orifice, scales 10 with zero weight ll sensors, accurate unloading 12, accurate loading 13, gained weight 14, sensor 15 of the final position of the loading gate valve, the sensor 16 of the final position of the shut-off unloading valve, the thyristor raskateleta vibrator boot 17, the unload vibrator 18, the boot gate 19 with the calibrated opening of the boot gate valve 20, the discharge gate 21 with a calibrated orifice, a discharge gate valve 22, a dosing control unit 23, an emergency diagnostics unit 24 and a unit. 25 predict loading and unloading times.

The block 23 is designed to control the dosing in two modes and form the correct sequence of commands for opening and closing the loading and unloading dampers of the weighing batcher and consists of triggers 26-30, counters 31 and 32 pulses, elements 4I-HE 33

.and 34, zem.ntov 2I-NOT 35 and 36, elements 2OR 37 and 38, reinforcing elements 39-42, and buttons Download 43 and Unloading 44.

Unit 24 diagnostics of emergency situations is designed, n, l analysis

92

emergency conditions and the formation - commands to block and stimulate the start of loading and unloading and consists of triggers 45-50, counters

51 and 52 pulses, elements 2I 53 and 54, elements 2I-NOT 55 and 56 ,. elements 2ILI 57 and 58, elements 59 and 60 delay, formers 61-66 pulses, inverters 67 and 68, generator 69 frequency 1. Hz, evitodiodi 70 - 73, and buttons 74 to eliminate the accident.

The loading and unloading time prediction unit 25 is designed

to predict loading and unloading times and forming commands to turn on vibrators that stimulate loading and unloading if real time exceeds

predictable. Unit 25 consists of triggers 75 - 77, counters 78 - 80 pulses, elements 2И 81 - 84, elements 2 OR 85 - 88, element 2 И NOT 89, decoders 90 and 91, amplifying elements 92 and 93, a digital code switch. 94, the driver 95 pulses.

As sensors 11-14, contactless limit switches of the type BK-A are used. These weight sensors are installed in the dial indicators of DVST scales used in the glass industry.

BEC type sensors are used as sensors 15 and 16, and thyristor PT type starters are used as thyristor starters 17. As a digital code switch, it uses PMP multi-position flat-panel switches designed; for manual setting of the program in automatic control systems.

The device works the following t

in a way.

In the initial position, the dispenser 1 is empty. The locking boot 6 and the unloading 7 flaps, the loading 8 and the unloading 9 flaps with a calibrated orifice are closed. The flag of the dial of the scale 10 is in the zero-weight sensor 11.

The dispenser starts loading by pressing in the dispensing control block 23 of the Download button, at the same time the Load command is formed at its third output, which is fed to the thyristor starter 20, and the shut-off loading gate opens3132

with . At the same time, the flap flag goes from sensor 15. The signal from sensor 15 enters the dosing control unit 23, where 2 seconds after opening the loading gate valve, a command is issued to open the loading gate 8 with a calibrated orifice that goes from the second output of the control unit 23 to the thyristor starter 9. The valve 8 opens, the filling of the weight metering device 1 begins. If the team forming the opening of the loading gate valves is formed, the dosing results from the reduction in the bunker 2 or for other reasons does not start and a flag arrow weights 10 are not vyodit from the sensor 1 January zero weight, the diagnostic unit 24 is formed emergency command stimulation start download. This command navigates through the loading and unloading time prediction block 25.

On the thyristor starter 17 of the Vibrator Startup 4, the Vibrator turns on for a while and stimulates the start of metering. Simultaneously with the start of metering, in block 25, a scheme for measuring the velocity of the mews is included. The loading speed, depending on the particle size distribution of the component to be dosed, its humidity and other parameters, is determined on a portion of the dial scale from the sensor 11 to the sensor 12 for exact discharge. Further, this time is multiplied by a factor proportional to the total dosing weight. The resulting time is assumed to be loading time, after which it is necessary to stimulate the loading process by turning on the vibrator 4, which is carried out by the command from block 25.

Upon reaching the arrow of the scales of the exact loading sensor 13, in block 23, the command is not opened or the opening of the loading gate with a calibrated orifice. The latter is closed, and a mode of exact filling with reduced speed starts. Upon reaching the arrow of the balance of the sensor 14, in block 23, the command to open the shut-off charging valve 6 is removed. The loading process of the metering unit ends by closing the valve 6. Simultaneously, in the emergency diagnostics block, the time for the valve to go from open to full state is measured

leg close. If the real-time is less than the specified time, then in block 24 an alarm is not generated. Slow shutter closure. If the transition time is more than the specified time and the signal from sensor 15 does not arrive at the input of block 24, then a discharge blocking command is generated at the output of block 24, which enters block 23

control of dispensing and prohibits unloading until the emergency situation is eliminated.

If, after closing the gate loading flap 6 arrow weights

continues to move and passes through the sensor 14 further, then in block 24 this situation is recorded as an emergency (overbalance) and the unloading is also blocked.

The unloading process is similar to the loading process. Unloading in the absence of blocking signals from block 24 begins with the button being pressed. Unloading in block 23 of metering.

From the output of block 23, a command is sent to the input of the thyristor actuator 22 to unload the opening of the unloading gate 7. The gate opens and the valve leaves the sensor 16, the signal from which goes to block 23, where in 2 seconds the command to open the discharge valve 9 with a calibrated hole. Team from-

The flap 9 enters the thyristor starter 21, and the flap opens.

The dispenser 1 is unloaded. If, after opening the unloading

the scales arrow does not exit sensor 14, then in block 24 a command to stimulate the start of unloading is formed. This command passes through block 25 to thyristor starters.

18 unloading vibrator 5. The vibrator is turned on for a while and stimulates the start of unloading. Simultaneously with the start of unloading in block 25, a circuit for measuring the speed of unloading is activated. The unloading speed is determined on the scale of the dial from the sensor 14 to the sensor 13. If during the predicted time of unloading the arrow does not reach

sensor 12, the unloading stimulation circuit is turned on in block 25, the stimulation command from which is supplied to the thyristor starter 18 of the vibrator 5.

Upon reaching the arrow of the balance of the sensor 12, the discharge valve 9 with a calibrated orifice closes. The exact additional discharge mode begins, which ends when the arrow reaches the sensor 11 of zero weight. The unloading ends by closing the shutter 7. If the closing time of the shutter is longer than the preset time, then in block 24 an emergency signal is formed. Slow closing of the discharge shutter with subsequent blocking of the next loading cycle.

. If the scale arrow does not stop in sensor 11 (overload) after closing the shut-off gate valve, but leaves to the left, this emergency situation is also fixed and the next load is blocked until the emergency situation is eliminated.

Block 23 operates as follows.

When the button 43 is pressed, the load from the output of the trigger 26 to the input of the 4I-NOT 34 element enters the logical 1. The second input of the 34-element of the logical 1 comes from the trigger 27 when the last signal from the sensor 11 has zero weight. The third input of element 34 of logic 1 comes from trigger 29, confirming that the discharge gate valve is closed. This connection blocks the opening of the loading and unloading gates at the same time, warning the end-to-end request for the material through the dispenser. If at the fourth input of the 4Y-NE 34 element of logical 1 from block 24 (no blocking due to an emergency), an output is issued to open the gate loading gate, which enters blocks 24 and 25 for diagnostics and prediction of loading time and to amplifying element 40 , From the output of element 40, the command goes to the thyristor unit 20 "The damper opens. The flap flag leaves sensor 15, the signal from which gives resolution to counter 31 and trigger 38 to recalculate the frequency of 1 Hz from block 24. After 2 seconds, trigger 28 switches and from its output logic 1 enters the input of element 2IHE 35, to the second the input of which enters 1 from trigger 30, which in turn is switched by the signal from sensor 11 through element 2 OR 37. At output 35, a command is generated for

opening the charging valve with a k-calibrated opening, which through the amplifying element 41 enters the thyristor starter 9.

Upon reaching the arrow of the scale of the sensor 13, the signal from the latter through the element 2ShIII 38 switches the trigger 30 so that 1 appears at its second output, and the command to open the valve 8 is removed. The exact loading mode starts, which ends with the triggering of the sensor 14, the signal from which switches the trigger 27. so that the logic 1

5 appears at the second trigger output. The loading is stopped and the loading gate valve 6 is closed. The unloading mode is similar to the loading mode. After pressing the button Q ki 44 Unloading trigger 26 switches and, if there is no blocking from block 24 and blocking from trigger 28 (valve 6 is open), four logical 1 are collected at the inputs of the 4I-HE 33, and a command to open the locking discharge valve 7. The command enters the blocks 24 and 25 and through the amplifying element 40

0 to the thyristor starter 22. The damper opens, its flag leaves the sensor 16, the signal from which Gives resolution to the counter 32 and the trigger 29 to recalculate the frequency of 1 Hz. After 2s, trigger 29 is switched. At the output of element 2I-NOT 36, a command is issued to open the valve 9, which through amplifying element 42 enters the thyristor starter 21. Upon reaching the arrow of sensor 12, the signal from the latter through element 2IL or 37 switches trigger 30 to its initial state. The shutter 9 closes and the mode starts.

5 exact unloading, which ends with the activation of the zero-weight sensor 11 and the switching of the trigger 27. The shutter 7 closes. The cycle ends.

0

In the case of switching on the device for controlling the metering device in the automatic line, switching the metering device on the loading and unloading mode can

5 is carried out automatically from the control circuit of the line by applying the Load command to the first input of the trigger 26, and the Unload command to the second input.

five

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Block 24 operates as follows.

If at the beginning of loading the flag of the scale arrow does not exit sensor 11, the two inputs of element 2I 54 result in coincidence of two signals — a command to open-load the gate valve from block 23 and a signal Weight O from sensor 11. Signal from the output of element 2И 54 goes to a delay element 60 (a delay of a few seconds) and further to the input of the imaging unit 62, the signal from which is fed to the unit 25 to stimulate the start of loading, if the dispenser does not start filling during the delay time. Similarly, a command to stimulate the start of unloading is formed in the circuit of elements 53, 59 and 61, if in the unloading mode the arrow does not exit the sensor 14. When the command to open the shut-off loading valve opens, the differential 66 appears at the input of the driver 66, and the pulse From you-r, the driver generates a trigger 49, at the output of which the counter 52 is enabled to recalculate a frequency of 1 Hz.

If the valve does not fully close within the specified time and the sensor 15 does not work, then a pulse appears at the output of the counter 52, which switches the trigger 50. From the trigger 50 output, the signal Slow closing of the locking loading valve goes to the display element 73 and the element 2PSHI 58, from the output of which the unloading blocking signal is fed to the input of block 23 If the arrow goes beyond sensor 14 after loading is completed, a voltage drop is formed on the sensor, the pulse shaper 65 responds to the sensor. If there is no command to open the shut-off damper, then through the inverter 68 to the input element 2I-NOT 56 signal. On element 2I-NOT 56, the signals from elements 68 and 65 coincide so that at output 56 a pulse appears that switches the trigger 46.

At the output of the trigger 46, a signal is displaced, which is fed to the display element 72 and to the input of the element 2IL. From the output of element 2ILI 58, the signal to block unloading enters the block 23i.

In an emergency situation, the flip-flop triggers 46, 50 are reset to the initial state by pressing the button 74.

Similarly, there is a diagnosis of emergency situations when discharging the dispenser. At the end of the command to open the gate unloading valve, the pulse from the output of the driver 64 switches the trigger 48, which gives permission for the counter 51 to recalculate the frequency of 1 Hz from the generator 69.

If the transition time of the valve from the open state exceeds

empty, then a pulse is generated at the output of the counter 51, which switches the trigger 47. A signal appears at the output of the latter. Slow closing of the unloading gate valve arrives at the display element 71 and at the input of element 2 OR 57. From the output of the load blocking signal enters the block 23. If at the end of unloading

the arrow goes beyond sensor 11, i.e. an overload occurs (it should be noted that the batcher may not have a zero, but a tare initial weight), then from the output of the driver 63 impulse

switches when there is no command at the input of inverter 67 Loading via element 2I-NOT 55, trigger 45. At output of trigger 45, a signal is reloaded, which arrives

The display element 70 and the input of element 2IL 57, from the output of the latter, block the load signal to block 23. After the emergency situation is eliminated, the flip-flops 45, 47 are reset to the initial state by pressing the button 74.

Block 25 works as follows.

From the beginning of loading, the command for opening the gate loading valve from block 23 is sent to the input of element 2ШШ 85, and from the output, the command is sent to pulse generator 95,

which switches the trigger 75. The latter, in turn, switches, the trigger 76 and through element 2I 83 gives permission for the passage of the frequency of 1 Hz from block 24 to the counting input

the counter 78. The trigger 76 gives the resolution of the counter .78 to recalculate the frequency and through the element 2I 84 allows the passage of the frequency 1 Hz to the counter input of the counter 80.

Counters 78 and 80 start counting the time for the arrow of the balance from sensor I1 to sensor 12. At the moment when the arrow passes sensor 12, the signal from the latter through element 2IL 86 switches the trigger 75 to the initial state, simultaneously stopping the time counting by counter 78, State the counter 78 is decrypted by the decoder 90, and the signal from the decoder 90 is fed to the input of the element 2I-HE 89. This state is stored. At the same time there is a coincidence of the signals on the element 2I-HE 89 from the decoders 90 and 91, since the counters 78 and 80 count the time synchronously. At the output of element 2I-NOT 89, a first pulse is formed, which is fed to the counting input of the counter 79 and to the installation input of the counter 80, resetting it to the zero state. Counter 80 starts a new countdown. After a time equal to the passage of the arrow from

The fact that the arrow from sensor 1A to sensor 13 is taken during the initial time is triggered. Trigger 75 switches the command to open the discharge relief valve through the circuit of element 2IJ 85 and shaper 95 and resets it from element 13 via element 2IL 86 If the unloading time exceeds 10 times the predicted time, equal to the time the arrow passes from sensor 14 to 13, multiplied by a factor proportional to the dosing mass, a trigger 77 is formed along the circuit 77, element 15 and 81, element 2IL 87 and a stimulation command is formed. Discharge, which through the amplifying element 93 enters the thyristor starter 18 of the discharge vibrator. At the second input of element 2IL 87, a stimulus signal can be received to start unloading from block 24.

Thus, the proposed mouth30

sensor 11 to sensor 12, the element 25 allows the realization 2I-HE 89 to be produced, the recorded state in the decoder 90 is compared to the state-decoder 91, the second pulse is generated at the output of the element 2I-HE 89, etc. . This counts several cycles.

Digital code switch 94 is a setpoint for the multiplication factor, which is determined by the ratio of the scale section from sensor 11 to sensor 13 to area from sensor 11 to sensor 12. Digital code switch 94 decrypts the state. the counter 79 and, if at a given time equal to the transit time of the arrow 40 to intensify the start of loading and in the section from sensor 11 to 12, with the unloading, if with formation of a code factor, the sensor 13 does not occur, the output of the switch 94 is formed an impulse that triggers the trigger 77, which, through element 2I 82, provided that there is a load command (from block 23 and element 2ILTI 88 forms a load-stimulating command,) coming through the amplifying element 92 to the thyristor starter 17 of the load vibrator. In other words, a differentiated estimate of loading time and its stimulation takes place. At the second input of element 2Ш1И 88, we can estimate the loading and unloading time; predict the loading and unloading time of the meter and diagnose the state of the gate valves by measuring the time that the gate valves go from the open state to closed and compared with the preset, as well as the diagnosis of the situation of Displaced and Reloaded, to prevent the dispensing of the dispensed material by blocking the operation of the dispenser, if exo -. yes shut-off valve from open state to. closed exceeds the norm;

mand for opening the dosing valves does not start, as well as the process of loading and unloading in case 45 the actual loading or unloading time exceeds the predicted one.

Claims (1)

Invention Formula 50 A device for controlling a dispenser of bulk components of a glass batch containing a dosing unit, scales with sensors of zero weight, accurate loading and unloading, accumulated 55 weights, loading and unloading gates and loading and unloading gates with a calibrated orifice, loading and unloading vibrators, the final sensors will receive a start stimulation signal from unit 24. The unloading time measurement circuit works similarly. The difference is that during the initial time, the arrow from sensor 1A to sensor 13 is taken. Trigger 75 switches the command to open the discharge relief valve through the circuit of element 2IL 85 and shaper 95 and is reset to source signal by sensor 13 through element 2IL 86 If the unloading time exceeds the predicted time, equal to the time of the arrow from the sensor 14 to 13, multiplied by a factor proportional to the dosing mass, then a trigger command is formed along the circuit of the trigger 77, element 2И81, element 2IL 87. unloading, which through the amplifying element 93 enters the thyristor starter 18 of the unloading vibrator. To the second input of element 2ILI 87 a signal can be received to stimulate the start of unloading from block 24. Thus, the proposed mouth30 25 roystvo allows real , 40 to intensify the beginning of loading and unloading, if with the formation of a fresh estimate of loading and unloading time; predict the time of loading and unloading the dispenser and diagnosing the state of the gate valves by measuring the time of the gate valves from the open state to the closed state and comparing with the set one, as well as diagnosing the situation Peremesheno and Reloaded, prevent the dispensing of the material being dispensed by blocking the dispenser operation if time is transition -. yes shut-off valve from open state to. closed exceeds the norm; 40 to intensify the beginning of loading and unloading, if with the formation of mand for opening the dosing valves does not start, as well as the process of loading and unloading in case 45 the actual loading or unloading time exceeds the predicted one. Invention Formula 40 to intensify the beginning of loading and unloading, if with the formation of 50 A device for controlling a dispenser of bulk components of a glass batch containing a dosing unit, scales with sensors of zero weight, accurate loading and unloading, accumulated 55 weights, loading and unloading dampers and loading and unloading dampers with a calibrated orifice, loading and unloading vibrators, final position sensors 1113 nor gate valves, thyristor starters, valve actuators, characterized in that it is equipped with an emergency diagnostics unit and a load and unload time prediction unit, in order to achieve control accuracy, the output position of the output gate valve is connected to the first inputs of the dosing units and diagnostics of emergency situations, to the second inputs of which the output of the end position sensor is unloaded: the gate valve, the third block inputs are dosed and diagnostics of emergency situations are connected to the output of the zero weight sensor, an accurate unloading sensor is connected to the fourth input of the dosing unit and to the first input of the load and unloading time prediction unit, to the second input of which the exact unloading sensor output is connected, the weight gain is connected to the sixth input of the dosing unit and the fourth input of the emergency diagnostics unit, to the fifth input of which is also connected to the third input of the prediction block of loading time and unloading narrow 12 the first output of the dosing unit is connected, to the seventh input of which the first output of the emergency diagnostics unit is connected, the second The output of which is connected to the fourth input of the prediction block for loading and unloading time and to the eighth input of the metering unit, the second output of which is connected to the input of the thyristor booster of the loading gate with a calibrated orifice, the third output of the metering unit is connected to the input of the thyristor starter of the loading gate valve, the fourth output of the metering unit connected to the input of the thyristor starter of the loading gate with a calibrated hole, the fifth output of the dosing unit is connected to the input of the thyristor The third output of the emergency diagnostics unit is connected to the fifth input of the loading and unloading time prediction unit, the first output of which is connected to the input of the thyristor starter of the unloading vibrator, and the second output of the predicting loading and unloading time unit is connected to the thyristor input boot vibrator starter.  ",but m cvi tj : --H In block 23