SU1661727A1 - Flotation reagents doser - Google Patents

Abstract

The invention relates to flotation reagent dosing devices and can be used in the coal, chemical and other industries. The purpose of the invention is to improve the accuracy and reliability of the device. The goal is achieved by the fact that in a known device containing a pulse generator, the first register, the first element AND, the threshold unit and the power amplifier associated with the reagent dispenser, two switching units, the RS flip-flop, the second and third registers, the multiplication unit, the memory unit, the comparison unit, the second element AND, the elements NOT, the flow master, the pulse driver and the dispenser on state sensor. 1 hp f-ly, 1 ill.

Description

The invention relates to flotation reagent dosing devices and can be used in the coal, chemical and other industries.

The circuit of the invention is to increase the accuracy and reliability of the device.

The drawing shows a functional diagram of the device.

A device for metering flotation reagents contains a pulse generator 1, first register 2, second register 3, third register 4, first and second switching blocks 5 and 6, RS flip-flop 7, unit 8 for reagent consumption, block 9 multiplying 9, amplifier 10 power, dispenser 11 reagents, the first element And 12, the sensor

13, the dispenser is turned on, the first element is NOT 14, the second element is AND 15, the driver of 16 pulses, the memory block 17, the third element is NOT 18, the threshold unit 19, the second element NOT 20, the compare unit 21 and the signaling unit 22.

A device for metering flotation agents works as follows.

From the output of the pulse generator 1, the signals arrive at the inputs of the first, second, and third registers 2-4, with the result that at their outputs the signals with the discreteness of D1 and & t appear sequentially. These signals go to the corresponding switching inputs of the switching

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blocks 5 and 6. In proportion to the signals at the control inputs of these blocks, their outputs change the period of the signals switched by them. Consequently, through time T, | & fci (where Ki is the coefficient depending on the magnitude of the signal of the setpoint reagent consumption meter 8) at the output of the switching unit 5, a pulse is generated that sets the RS-trigger 7 to the on state.

RS-trigger 7 through the amplifier 10 power supplies power to the electromagnet of the dispenser 11. At the same time | the pulse at the setup inputs of the first, second, and third registers 2 - 4 resets their contents. The first register 2 immediately begins to accumulate pulses from the generator 1. Thus, the magnitude of the signal from the adagent consumption meter of the reagent 8 determines the period of the pulses at the output of the switching unit 5, and hence the frequency of operation of the dispenser electromagnet 11.

If there is power on the electromagnet of the dispenser 11 and after its actual operation, a signal appears at the output of the first element I 12, which by means of an enable input triggers the second and third registers 3 and 4. After time Ta K2-& tu (where K2 is coeffie

Cient, depending on the magnitude of the multiplier signal) at the output of the commutation unit 6 according to the Vits im Pulse, which overturns the RS flip-flop 7 and turns off the power to the electromagnet of the dispenser 11. At the same time, the enabling signal on the second register 3 disappears and it stops accumulating impulses. At the same time, the third register 4 continues to accumulate pulses until the actual disabling of the dispenser 11, which is monitored by the sensor 13, when the dispenser is on. The contents of the second and third registers 3 and 4 are compared using comparison block 21, and if the delay time of the actual disabling of the dispenser does not exceed a predetermined value determined by the threshold block 19, at the moment the second and third registers 3 and 4 stop, then at the command of the second element And the 15 shaper 16 pulse through the enabling input ensures that the memory unit 17 stores the memory

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the mismatch of the actual and the specified duration of the inclusion of the electromagnet dispenser 11.

According to the magnitude of this mismatch, through the control input of the multiplication unit 9, the coefficient K is adjusted, and, consequently, the preset duration of the dispenser 11 is adjusted.

In case the magnitude of the mismatch is actual and given. the duration of the electromagnet activation exceeds a predetermined value, the threshold unit 19 turns on the dispenser alarm state alarm unit 22.

Claims (2)

1. A device for dispensing flotation reagents, comprising a pulse generator, a first register, the first element I, a threshold unit and a power amplifier, the output of which is connected to the input of the reagent dispenser, in order to increase the accuracy and reliability of the device contains two switching blocks, an RS flip-flop, a second and third registers, a multiplication unit, a memory unit, a comparison unit, a second AND element, NOT elements, a flow master, a pulse driver and a dispenser on state sensor, the output of which is connected to To the first input of the first element I, through the first element NOT to the first input of the second element I and to the resolution enable input of the third register, the setup input of which is connected to the output of the first switching unit, to the S input of the RS flip-flop and to the installation inputs of the first and second registers, the counting inputs of the registers are connected to the output of the pulse generator, the outputs of the first register are connected to the corresponding information inputs of the first switching unit, the control inputs of which are connected to the corresponding outputs of the control gate The flow rate and with the first group of inputs of the multiplication unit, the second group of inputs of which are connected to the corresponding outputs of the memory element, and the outputs with the corresponding control inputs of the second switching unit, the outputs of the second register are connected to the corresponding first inputs of the comparison unit and the corresponding information inputs of the second switching unit, the output of which is connected to the R input of the RS flip-flop, connected to the input of the power amplifier and the second input of the first And element, the resolution enable of the second register and connected to the output of the first And element through the second element NOT to the second input of the second element I, the third input of which is connected to the output of the third element NOT, and the output - to the input of the imager pulses, the second inputs of the comparison unit are connected to the corresponding outputs of the third register, and the outputs are connected to the corresponding information inputs of the memory unit and to the corresponding inputs of the threshold unit connected to the output of the third element HE, and the output of the driver of the memory unit . 2. Device pop. 1, characterized in that the output of the threshold unit is connected to the input of the alarm unit.