SU1653836A1 - Device for controlling discharging slot of cone crusher - Google Patents

Description

The invention relates to control devices for crushing units and can be used to automatically control the size of the discharge gap of a medium and fine crushing crusher for ores of ferrous, non-ferrous and non-ferrous materials.

A device for controlling a crusher of medium and fine crushing is known, which includes a master for the size of the discharge gap, a crusher capacity sensor and an adjustable drive of the cone 1.

The known device does not provide the necessary control accuracy, since the regulation of the speed of the cone drive is carried out with changes in the discharge gap without taking into account the actual change

physical and mechanical properties of the source material.

The closest in technical essence is a device for controlling the size of the discharge gap of a cone crusher, which contains a cone drive load sensor, which is connected to the input of the performance sensor, an adjusting ring position adjuster, which is connected to one of the inputs of the control ring of the adjusting ring drive 2.

This device does not automatically adjust the size of the discharge gap when the lining is worn, which leads to an increase in the adjustment time required for the measurement gap.

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mechanically with the cone drive off.

In addition, with manual control and adjustment of the size of the discharge gap, the labor intensity and downtime of the crusher increase, which reduces its productivity and the quality of the crushed product in granule composition. In turn, destabilization of the granular composition of the output product leads to disruption of the technological process and the mode of operation of the grinding and crashing mechanisms that follow the crusher, as well as their additional wear and increasing power costs for grinding.

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

The goal is achieved in that the device for controlling the size of the discharge gap of a cone crusher, comprising a cone drive load sensor, which is connected to the input of the performance sensor, an adjusting ring position adjuster, which is connected to one of the inputs of the adjusting ring drive control unit, has two transducers mi, nonlinearity unit, positioning ring of the adjusting ring, a reference element and an analyzer, the analyzer and the output of the performance sensor connecting Adjacent to the corresponding inputs of the first converter, the output of which is connected via a nonlinearity unit to one of the inputs of the comparison element, the output of which is connected to another input of the control ring drive control unit, the drive of which through the serially connected position sensor of the adjustment ring and the second converter .

The drawing shows a block diagram of the proposed device.

Sensor 1 load drive 2 cones 3 crusher 4 is connected to the input of sensor 5 of the crusher's performance, the output of which is connected to one input of the first functional converter 6, to the other input of which is connected an electronic express analyzer 7 physical and mechanical properties of the original product, and the output through block 8 a non-linearity with an adjustable deadband is connected to one input of the comparison element 9, to the other input of which an adjusting position sensor 11 is connected via the second functional converter 10 th ring, while the output - to the other input 13 of the drive control unit 12 of the adjustment ring 14, to one of whose inputs

A setpoint adjuster 15 is connected to an adjustment ring lined on the outside, and on the inside side connected by threaded cutting to the body of the crusher 4.

Analyzer 7 is designed to take a sample, determine the average grain size, moisture content, and strength (crushability) of the material. Total signal proportional to

controlled parameters, from the output of the analyzer 7 is fed to the functional Converter 6.

The device works as follows.

Before switching on the crusher 4, using the setting device 15 of the position of the adjusting ring 14, set the required size of the discharge gap. The signal from the setting unit 15 serves on

the input of the drive control unit 12 of the adjusting ring, under the action of which the actuator 13 is turned on and the adjusting ring 14 rotates with respect to the levers (not shown)

crusher casing 4. The direction of rotation of the adjustment ring is such that it rises in a thread pitch, is set, for example, in the upper position and stops. The gap between the bottom end

the adjusting ring 14 and the cone 3, called the discharge gap, is set, for example, by the minimum (b) and determined by the design parameters of the crusher,

After setting the required size of the discharge gap, the drive 2 of the cone 3 is started, which comes into rotational-swinging motion and causes the load of idle, controlled by the sensor 1

drive load. The load sensor has an idle load insensitivity zone, so there is no signal at its output.

When the material is fed to the crusher, the load of drive 2 increases above the idle load and the output of sensor 1 is a signal that enters the input of performance sensor 5, which operates on the principle of integrating a load signal, for example, active power as a function of time. The output signal of the sensor 5 performance is fed to the first input of the first functional Converter 6, which sets

the compliance of the abrasive abrasion of the lining of the adjusting ring 14 and the cone 3 to an increase in the size of the discharge gap depending on the amount of material being crushed (crusher capacity Q).

Abrasive wear of the lining Dv crusher from abrasion by crushed material is in a non-linear dependence on the performance of the crusher. Dex composition and strength f of the original product, armor material, the speed of rotation of the cone n and other factors and is determined by

Leu Ki Ki Kg Kz dex fn, where Ki, K4 are the coefficients determining the wear of the crusher lining depending on the productivity and speed of rotation of the cone;

Ks.Kz - the coefficients that determine the wear of the lining depending on the composition and strength of the source material (based on measurements of the express analyzer).

To improve the accuracy of the assessment of the wear of the crusher armor, the analyzer 7 physicomechanical properties of the initial product control the current composition of dBx, strength f, humidity, etc. the input product and the total signal proportional to their aelichin are fed to the second input of the functional converter 6. In this functional converter, the indicated dependence is realized, i.e. from its output, a signal is produced that is proportional to the abrasive wear of the lining of the crusher as a function of productivity, speed of rotation of the cone, the composition and strength of the material entering the crusher, the magnitude of which increases with the amount of crushed material. The output signal of the functional converter 6, corresponding to an increase in the size of the discharge gap Abe, is fed to the input of the nonlinearity unit 8 with an adjustable deadband, which is tuned to the allowable output (increase) of the gap, relative to the predetermined variation of the composition of the output product from the specified one. When the output signal of the functional converter 6 exceeds the set dead band of the block 8, i.e. when the unloading slit increases to more maximum permissible, the output signal at the output of the non-linearity unit 8 is reached and, through the comparison element 9, is fed to the input of the adjusting ring drive control unit 12. Under the action of this signal, the scheme for prohibiting the supply of material to the crusher is triggered and the adjusting ring (these

knots are not shown), and then the actuator 13 of the adjusting ring is turned on, which by means of the lever system acts on the adjusting ring 14, and it turns in the threaded joint of the body of the crusher 4. The direction of rotation of the adjusting ring thus lowers below the predetermined position and the discharge gap is reduced.

The position of the adjusting ring relative to the crusher body is determined by the performance of its actuator 13 by means of the position sensor 11. In the sensor 11, the dependence of the height to which the adjusting ring is lowered when it is rotated by the drive is established as a function of performance, for example, of the hydraulic drive. A signal proportional to the position of the adjusting ring from the output of the sensor 11 is fed to the input of the second functional converter 10, in which the change (decrease) in the size of the discharge gap corresponds to the change in the position of the adjusting ring.

The output signal from the functional converter 10 is proportional to the reduction of the size of the unloading slit DU when the adjusting ring is moved downwards to the input of the eccentric element 9 in antiphase with a signal proportional to the development of the slit DV in the non-linearity unit 8. In the comparison block, the signals Abe and A by are subtracted. With a constant value of the signal D be and an increasing signal Aby, the difference (LV - A by) decreases to zero. When they are equal, there is a complete compensation of production (i.e., an increase due to abrasive wear of the lining with a crushable material on the discharge gap and the establishment of a given size). The absence of the output signal of the comparison element, and consequently, at the output of the control unit 12, leads to the shutdown of the actuator 13 of the adjusting ring, its locking and resolution of the material supply to the crusher.

The automatic control of the size of the crusher's discharge gap as a function of changes in the physicomechanical properties of the initial product allows stabilizing the composition of the crushed material, i.e. increase one of the indicators of its quality.

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Claims (1)

(54X57) DEVICE FOR CONTROLING THE SIZE OF THE UNLOADING CRACK OF THE CONE CRUSHER, comprising a cone drive load sensor that is connected to the input of the performance sensor, an adjuster ring position adjuster that is connected to one of the inputs of the adjusting ring drive control unit, characterized in that, in order to increase control accuracy, it is equipped with two transducers, a nonlinearity block, a position ring adjustment sensor, a comparison element and an analyzer, the analyzer and the output sensor capacities are connected to the corresponding inputs of the first converter, the output of which is connected through a non-linearity block to one of the inputs of the comparison element, the output of which is connected to the other input of the control ring drive control unit, the drive of which is connected through a series-connected position sensor of the adjustment ring and the second converter to the other input of the element comparisons.