SU1423160A1 - Automatic apparatus for control of air mode of operation of jigging machine - Google Patents

Abstract

The invention relates to the enrichment of coal and ore and allows the air regime of a jigging machine (OM) to be controlled with high precision by controlling the varying cycle of the OM liquid with a varying cycle of motion. For this, the control unit (CU) for the inlet and outlet of compressed air is designed as an OR element connected to trigger 1, elements

Description

3

SL

2, 3 delays, elements 4, 5, generators (D) 6, 7 with adjustable frequency and duty cycle of pulses, counters 8, 9 pulses and presets 10, 11 of the number of emulsions. The controllers 10, 11 are connected to each T 6, 7, respectively, to each counter 8, 9. The outputs of the And 4, 5 elements are the outputs of the compressed air inlet and discharge unit and connected to the pulsators 15 via the corresponding electro-pneumatic valves 13 and 14 and 1.6 valve type, which are connected to the OM air chamber.

Elements 2 and 3 of the delay form a pause between release and release and give permission to work, respectively, G 6 or 7 and the passage of pulses through the element 4 or 5 to the valve 13 or 14. The number of pulses for the inlet or outlet is set by the setting device 10 or 11, MacTOTja and the duty cycle of the fundamental frequency are set to G 6 and 7. Trigger 1 switches on the signal from the output of the element OR 12 if the number of pulses from G 6 or 7 and the setting device 10 or 11 is equal. 1 Il.

The invention relates to the enrichment of coal and ore, namely, the automatic control of the oscillatory process in a jigging machine by the method of superimposed oscillations.

 The purpose of the invention is to improve the control accuracy by adjusting the varying cycle of movement of the separation fluid in the jigging machine.

The drawing shows a block diagram of this device.

The device contains a control unit for the inlet and outlet of compressed air made in the form of a trigger 1, the output of which is connected to the input of the first delay element 2 and, to the input of the second delay element 3, the output of elements 2 and 3 is connected to the first inputs of the elements 4 and 5 and to the outlets first and second generators 6 and 7, in which the frequency and duty cycle of the pulses are controlled independently of each other, which makes it possible to set different times for the admission or discharge of compressed air at the same frequency, as well as at the same time ska and release compressed air to vary the frequency of oscillation of the jig bed in the range 0.5 - 10 Hz (30 600), the generator output 6 soedimin

It is connected with the input of the counter 8 pulses, and the output of the generator 7 is connected to the input

five

0

five

0

five

counter 9 pulses. The pulse counters count the pulses from the generators 6, 7, determine the number of pulses per inlet or outlet c. using setters 10, 11, the number of pulses connected respectively to the generator 6, 7 and to the counters 8, 9, the outputs of the counters 8 and 9 connect-. with the input element OR 12, the output of which is connected to the input of the trigger 1. Elements And 4 and 5 are the outputs of the control unit of the inlet and outlet of compressed air, the output element And 4 connected to the electropneumatic valve 13 to the inlet air, and the output element And 5 is connected with electropneumatic valves 14 to release air. The valves 13 and 14 are connected to the pulsators 15 and 16 of the valve type, which are connected to the air chamber of the jigging machine (not shown).

The device works as follows.

When power is applied, counters 8 and 9 are reset. The trigger 1 at the direct output is set to level 1, and at the inverse, o, which prohibits the generator 7 and the passage of pulses through element 5 to the electropneumatic valve 14 of the air outlet. 1 at the direct output of flip-flop 1 enters delay element 2, which forms a pause.

between the release and the inlet, gives permission to the generator 6 and the passage of pulses through the element I.A to the electropneumatic valve 13 inlet. The number of pulses for the inlet is set by the setting device 10, and the frequency and duty cycle of the pulses of the main frequency for the intake is set by the generator 6. When a command is sent to the device, the pulses from the generator go to an I 4 element, the output of which is a series of pulses with a frequency equal to frequency

f and A- f, „,

where f, - superimposed (optional

P

frequency; And - the number of pulses in

series; C1c main oscillation frequency

bed.

For example, the basic oscillation frequency of the bed of the jigging machine is 1 Hz (60 count / min), the number of pulses per inlet 3, then the frequency of superimposed oscillations f will be equal to 3 Hz. With this frequency the anti-pneumatic valve 13 turns on, which includes the valve pulsator 15 and supplies air to the air chamber of the jigging machine. Simultaneously from the generator 6, the pulses arrive at the input of the counter 8 pulses, which with the aid of the setter 10 of the number of pulses increases the main frequency as many times as the counting pulses are set by the setter 10, and also generates a signal when the number of pulses from the generator 6 and setpoint 10 is equal to the element OR 12, the signal from which switches the trigger 1, on the inverse output of which appears with level 1, after a time equal to the pause created by the delay element 3, and at the direct output level O, which prohibits the operation of generator 6, n the emergence of pulses through the element And 4 on the electropneumatic valve 13 intake / air. 1 at the inverse of the trigger input 1 enters the delay element 3, which forms a pause between inlet and outlet, gives permission to work the generator 7. and the passage of pulses through the element And 5. QualqQ 5

0

About g 0 g Q

The output pulses are set by the setting device 11, and the frequency and duty cycle of the main output frequency pulses is set by the generator 7. The pulses from the generator go to element 5, at the output of which a series of pulses appear with a frequency equal to f ,, С fp, where С - the number of pulses in the series on release.

The electropneumatic valve 14 is turned on with this frequency, the valve pulsator 16 is turned on with the same frequency, which releases compressed air from the air chamber to the atmosphere.

Simultaneously from the generator 7, the pulses arrive at the input of the counter 9 pulses, which with the aid of the setting device 11 of the number of pulses increases the main frequency as many times as the counting pulses are set by the setting device 11, and also generates a signal when the number of pulses is equal from the generator 7 and the setting device 11 per element OR 12, the signal from which triggers trigger 1 and level 1 appears at the direct output, which, after a time equal to the pause between release and inlet, created by delay element 2, gives permission for generator 6 to operate and pass waiting; pulses through element 4 on the electropneumatic valve 13 of the air intake and CI7SL is repeated

This device allows to provide a wide range of variation of the jigging machine operation modes, changing the number of pulses for air inlet and outlet, their duration and wellness, you can get any symmetric or asymmetrical cycle of movement of the separation fluid in the jigging machine, thereby increasing the accuracy control and efficiency of material separation in the machine.

Claims (1)

Claims. A device for automatically controlling the air-jigging mode of a jigging machine, comprising valve-type pulsators connected to electropneumatic valves which are connected to a control unit for inlet and outlet of compressed air, characterized in that. In order to increase the control accuracy by expanding the control range with a varying cycle of movement of the separation fluid in the jigging machine, the control unit for the inlet and outlet of compressed air is made IB as an OR element, connected | to a trigger, two delay elements, | two elements, And the outputs of which are in the | outputs of the control unit; inlet and outlet of compressed air, two generators with adjustable frequency and duty cycle of pulses, two pulse counters and two controllers - IKOB number of pulses connected respectively to each generator with adjustable frequency and duty cycle of pulses and to each pulse counter, the outputs of which are connected to the inputs of the OR element, and the first and second delay elements are connected respectively to the first input of the first and second Nick elements to the input of the first and second generator with adjustable frequency and duty cycle consoles, which are connected respectively with the second input of the first and second elements And and the forward and feedback of the first and second pulse counters, and the output of the trigger is connected to the inputs of the first and second delay elements.