RU2272673C2 - Device for automatic control of grinding process - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: device comprises control unit, unit for control of operating cycle, power control unit, and unit for choosing criteria. The device additionally has unit for collecting information, unit for processing information, unit for generating control signal, unit for control of inactivity period by the signal from the metal locator, unit for shaping control signal, unit for generating alarm signal, signalizing unit, and temperature gauge. The outputs of the unit for collecting information are connected with the pickups of the metal locator, power pickups, and temperature gauges. The outputs of the unit for processing information are connected with the outputs of the unit for collecting information and unit for choosing criteria whose output is connected with the input of the unit for generating control signal whose first output is connected with the input of the unit for generating alarm signal, second output is connected with the motor of the conveyor through the unit for shaping the control signal and second output of the control unit, and third output is connected with the signalizing unit. The first output of the control unit is connected with the input of the unit for control of inactivity period. The input of the unit for control of inactivity periods by the signals from the metal locator is connected with the second output of the pickup of the metal locator. The outputs 1-5 of the unit for generating the signal of alarm are connected to the circuit for control of the mechanisms.

EFFECT: simplified circuit.

1 dwg

Description

The invention relates to devices for controlling the process of crushing material in a crusher and can be used in the mining and construction industries.

A known device for controlling the operating mode of the crusher, including an adjustable feeder drive, an adjustable drive of the crusher engine, a load sensor of the crusher engine and material level in the crushing chamber, vibration sensor of the crusher body, converters, amplifiers, threshold elements. The device contains at least two main control loops: the first regulates the feeder’s productivity depending on the crusher engine load and the material level in the crushing chamber, the second regulates the oscillation frequency of the crusher moving body depending on the size and strength of the crushed material. The size of the material is defined as a function of vibration velocity, and the strength of the material as a function of the amplitude of oscillations of the crusher body [1].

The disadvantage of this device is the use of vibrational vibration amplitude of the housing to assess the particle size distribution of destructible material. In addition, the device does not provide optimal loading of the crusher, since the signal generated by the control system according to the amplitude of vibration and vibration velocity of the crusher body, due to the sensitivity and large error of the vibration speed in the low-frequency range of the crusher (0.5-7 Hz), does not allow conclusion about the size and strength of crushed material.

The closest device in terms of features to the present invention is a device for automatically controlling the process of crushing material in the crusher, containing a flow sensor of the material fed to the crusher, a feeder capacity regulator, a power sensor consumed by the crusher drive, an hour meter, a crusher discharge slot width regulator, a sensor the size of the crushed material, the block selection criteria (prototype). Additionally, the device contains a unit for calculating the relative energy costs per 1 ton of crushed material, the first input of which is connected to the second output of the material flow sensor, the second input is connected to the output of the power sensor consumed by the crusher drive, and the third input is connected to the second output of the hour meter, the extrapolator is a block of calculating the predicted values of the size of the crushed material, the first input of which is connected to the output of the unit for calculating the relative cost of electricity per 1 ton of crushed material, and the second input with the unit for calculating the coefficients of crushed material, the unit for calculating the coefficients of the objective function and limitations, the input of which is connected to the output of the unit for calculating the relative strength of the material, and the output is connected to the input of the optimizer, the first output of which is connected to the second input of the feeder performance controller, and the second output of the optimizer connected to the second input of the regulator of the width of the discharge gap of the crusher [2].

The disadvantage of this device is the bulkiness of the circuit, low reliability.

The technical result of the invention is the simplification of the scheme, improving the quality of the process of crushing the material, reducing the size class.

The technical result is achieved by the fact that the device for automated control of the process of crushing materials contains a data collection unit, inputs 1-3 of which are connected to the outputs of the sensors of the power of the crushers, temperature, state of the mechanisms and output 1 of the metal detector, the inputs of the information processing unit are connected to the outputs of the information collection and selection units modes, the output is with the input of the signal control generation block, the outputs 1, 2 of which are connected to the inputs of the emergency stop signal generation blocks and form its signal. The output of the control signal generating unit is connected to the input of the control unit, the output 1 of the control unit is connected to the input of the operating time metering unit, and the output 2 is connected to the supply conveyor. The input of the downtime metering unit for triggering a metal detector is connected to the output of 2 metal detector sensors, the outputs 1-5 of the emergency stop signal generation unit are connected to the inputs of the control units of the technological circuit mechanisms, and the information processing, control signal generation, downtime accounting and armor operating time accounting units are programmed and entered into the PC.

The specified set of features in the patent and technical literature is not found, which suggests the presence of novelty and inventive step in the proposed device.

The drawing shows a block diagram of a device.

A device for automated control of the process of crushing the material contains a block 1 for collecting information, a block 2 for processing information, a block 3 for a control signal, a block 4 for accounting downtime for a signal from a metal detector, a block 5 for metering hours, a block 6 for selecting criteria, a block 7 for generating a control signal, a block 8 for generating emergency stop signal, control unit 9, warning block 10 and sensors: 11 - metal detector, 12-13 - power crushers, 14-15 - temperature. The circuit includes a conveyor-feeder 16, screens 17, crushers 18.

The inputs 1-4 of the block 1 information collection are connected to the outputs of the sensors 11-15. The inputs of the information processing unit 2 are connected to the outputs of the information collection unit 1 and the criteria selection unit 6, the output is with the input of the control signal generation unit 3. The output 1 of unit 3 is connected to the input of the emergency stop signal generating unit 8, the output 2 through the control signal generation unit 7 and the output 2 of the control unit 9 — with the conveyor-feeder motor 16, output 3 — with the warning signal unit 10. The output 1 of the control unit 9 is connected to the input of the operating time accounting unit 5, the input of the downtime accounting unit 4 by the metal detector signals is connected to the output 2 of the sensor 11, the outputs 1-5 of the emergency stop signal generation unit 8 are included in the electrical control circuits of the mechanisms of the process circuit 16-18, and blocks 2 of information processing, 3 of generating a control signal, 4 accounting of downtime and 5 accounting of operating time are made in the form of a software product and entered into the PC.

The device operates as follows.

The measuring part of the device is represented by power sensors installed in the power supply circuits of electric motors, temperature sensors installed on the crusher body, and a metal detector installed in the conveyor-feeder circuit.

The control part of the device — accounting and signaling units — processes and analyzes information, and adjusts technological parameters and processes. In block 1 for collecting information, the signals of the sensors are received: 11 - metal detector, 12-13 - power crushers, 14-15 - temperature, in analog form, where they are converted to digital form and transmitted to block 2 information processing. The operator reads the information from the monitor and, through the criteria selection unit 6, transmits the recommended commands to the information processing unit 2. All information from the information processing unit 2 enters the control signal generation unit 3. Block 3 of the generation of the control signal through output 1 transmits to block 8 of the generation of emergency stop signals commands to stop the equipment (when the technological parameters of the equipment go beyond); through output 2, the control signal generating unit 7 and the control unit 9 acts on the conveyor-feeder 16, changing its speed; through output 3 - to block 10 warning signals about the possibility of an emergency. From control unit 9, through output 1, a signal is sent to operating time accounting unit 5, which takes into account the service life of the armor. From the output 2 of the metal detector 11, in the case of metal objects falling onto the conveyor-feeder 16, a signal is sent to the downtime accounting unit 4. Data from block 1 enters the computer, data processing is performed by blocks 2-5, at least two PC programs.

The proposed device in comparison with the prototype is simpler constructively, more reliable, allows you to quickly respond to changes in the process, reduces the size class. Refers to energy-saving technologies.

Information sources

1. A.S. USSR No. 1101303, class B 02 C 25/00, 1984

2. RF patent No. 2204438, cl. B 02 С 25/00, 2003

Claims (1)

A device for automated control of the material crushing process, comprising a control unit, an operating time accounting unit, a power sensor and a criteria selection unit, characterized in that it further comprises an information collection unit, an information processing unit, a control signal generation unit, an idle accounting unit based on a metal detector signal, a generating unit a control signal, an emergency stop signal generating unit, a warning alarm unit, temperature sensors, while the inputs of the information collection unit are connected to the outputs of the sensors of the metal detector, power and temperature, the inputs of the information processing unit are connected to the outputs of the information collection unit and the criteria selection unit, and its output is connected to the input of the control signal generating unit, the first output of which is connected to the input of the emergency stop signal generating unit, the second output through the block the formation of the control signal and the output 2 of the control unit - with the conveyor-feeder motor, the third output - with the warning alarm unit, output 1 of the control unit is connected to the input of the metering unit n operation, the input of the downtime metering unit by metal detector signals is connected to the output of the 2 detector sensors, the outputs 1-5 of the emergency stop signal generation unit are included in the electrical circuits for controlling the mechanisms of the technological circuit, and the information processing, control signal generation, downtime accounting and operating time accounting units are executed as a software product and introduced into the PC.