SU1315023A1 - Method of automatic control of crusher unit - Google Patents

Abstract

The invention relates to crushing production, can be intended for use in an automated process control system in the crushing plants of ferrous and nonferrous metallurgy, in the construction industry and allows to improve the quality of control. To achieve this goal, for each crusher, the maximum permissible power values are set, the power consumed for crushing by each crusher is measured, the supply of the starting material to the secondary crusher is changed, the size of the discharge crusher of the secondary crusher is changed, the crusher load is reduced when the maximum permissible value is reached power values, measure the vibration velocity of the crushing body of the medium crushing mill at different widths of the discharge gap and the vibration speed of the crushing body of the crusher crushing at a constant size of the discharge gap. Changes in the feed of the source material to the medium crushing crusher are carried out in inverse proportion to the vibration velocity of this crusher, and changes in the size of the discharge gap of the medium crushing crusher are carried out in inverse proportionality from the crusher vibration reduction ratio of the fine crushing. 1 il. SO SP o you

Description

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The invention relates to a crushing production designed for use in an automated process control system at a crushing factory in ferrous and non-ferrous metallurgy, in construction industry.

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

The essence of the method is as follows.

Maximizing the throughput of the crushing complex is achieved by providing optimal} 1o of a given crusher crushing load by changing the width of the discharge chipper of the medium crushing crusher inversely proportional to the vibration velocity of the crusher casing crusher and ensuring the optimally defined crushing feed capacity of the crusher proportional to the vibration velocity of its hull, coordination of the operating mode of the crusher ground crushing with the mode of operation of the crusher of fine crushing by changing the vibration velocity of the body of the crusher of the medium crushing, depending on the width of its discharge gap.

The drawing shows a block diagram of a device that implements the method.

The device consists of a feeder

1 material, crusher 2 medium crushing, crusher 3 fine crushing, sensors 4 power and vibration speed 5 crushers 2 and 3 medium and fine crushing, regulator 6 of the size of the discharge gap of the crusher 2 medium crushing, block 7 setting the value of vibration speed, block 8 determining vibration speed, regulator 9 of the load of the crusher 2 of the crushing crushing, block 10 of determining the priority of control actions, the system 11 of the size control of the discharge gap of the crusher

2 medium crushing, drive 12 feeder 1, Example. With a given size of the discharge gap of the crusher 3 fine crushing and with fixed sizes of the discharge gap of the crusher 2 medium crushing, the given values of the vibration velocity of the shell are experimentally determined

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crushers 2 and 3 with their maximum throughput. The vibration velocity setting value for the crusher 3 is entered into the task block 7.

The vibration speed reference values at fixed widths of the discharge gap of the crusher 2 are entered into the memory registers of the vibration velocity determination unit 8.

In the initial state, the size of the discharge gap of the crusher 2 (medium crushing) is set to the minimum in the range of adjusting the size of the gap.

The crushing of the material entering the crusher 2, the signal from the sensor 5 of the vibration velocity, equal to the current value of the velocity, is fed to the input of the controller 9 loading

crushers 2. A signal from the output of the size control system 11 of the discharge gap of the crusher 2, equal to the value of the size of the discharge gap, is fed to the input of the vibration velocity determination unit 8. At the output of the vibration velocity determination unit 8, a signal appears equal to the vibration velocity value recorded in the memory register of the block.

8 at a fixed value of the width of the discharge gap equal to the current

value of the size of the discharge gap. From the output of block 8, the signal is fed to the input of the regulator 9 of the load of the crusher 2, where it is compared with the current value of the vibration velocity. Based on the deviation of the regulator

9 sets the rotational speed of the drive 12 of the feeder 1 through the block 10. When the crusher 2's power consumed by the motor is exceeded, the input of the regulator 9 from the power sensor 4 is higher. a signal is received that reduces the signal at the output of the regulator 9, and hence the load of crusher 2..

When the material enters the crusher 3 of fine crushing, the signals from the vibration velocity sensor 5 and the unit 7 setting the vibration vibration velocity values of the crusher body 3 arrive at the input of the regulator 6 of the size of the discharge gap of the crusher 2.

Based on a comparison of the floor: .1Х signals, the controller 6 increases the width of the discharge gap of the crusher 2 to the nearest fixed value ..

With an increase in the discharge gap of the crusher 2, the output signal from the system

11 control the size of the discharge gap of the crusher 2 is fed to the input of block 8, the output of which gives a signal to set the vibration velocity of the housing with a new width of the discharge gap of the crusher 2 to the regulator 9. At the output of the regulator 9 a signal appears to increase the load of the crusher 2 .

Increasing the size of the discharge gap of the crusher 2 increases the amount and granulometric composition of the material loaded into crusher 3, which leads to an increase in the current vibration velocity of the crusher body 3. If the current vibration velocity of the vibration of the crusher body 3 does not reach the vibration velocity specified by unit 7, the cycle control of the crushing complex is repeated, namely, there is an increase in the size of the discharge gap of the crusher 2, the change in the load of the crusher 2 by the feeder 1, respectively Enikeev maximum bandwidth izmenivshems crusher 2 at a rate of discharge gap, comparing the current value of vibration oscillations crusher housing 3 with a predetermined.

The control action sequencing unit 10 functions as follows: when the crusher power values are below the maximum permissible values, the priority operation is to regulate the load of the crusher 2 by changing the capacity of the feeder 1. When the control signal comes from the regulator 9, the crusher of the secondary crushing unit 10 the crusher 2 is loaded with medium crushing (the signal from the regulator 9 through the block 10 is fed to the drive 12 of the feeder) and at the same time the prohibition of Menenius width of the crushing gap of crushing 2. When the maximum throughput capacity crusher 2 load signal controller crusher crushing medium torus 9 is zero. When a zero signal is received from the crusher loading controller 9 in block 10, the latter removes the ban on adjusting the width of the discharge gap of crusher 2 and prohibits changing the load of crusher 2 on average crushing while the size of the width of the discharge gap of crusher 2 changes to the nearest fixed value. When the size of the width of the discharge gap is reached, the value of the nearest fixed value is established

the prohibition of changing the width of the discharge gap, the crusher .2 and the prohibition of changing the load of the crusher 2 is lifted. After this, the cycle-regulation is repeated.

If the current power values exceed the maximum. the permissible power value of each crusher unit 10 detects a signal to reduce the load of the corresponding crusher

and establishes a ban on the regulation of crushers as a function of the vibration velocity of the crusher body. After reducing the power values below the maximum allowable decrease

the load on the drive power of the crushers is stopped and the ban on the regulation of the crusher body oscillations with respect to vibration velocity is lifted. The method allows to provide

maximum throughput, maintaining the optimal mode of each crusher, evenly distribute the load between the crushers of the complex. This increases the efficiency of the crushing process of the crushing complex as a whole, reducing the specific energy consumption for crushing. The service life of crushers is also increased, the cost of repairs is reduced with an increase in turnaround time.

Claims (1)

Invention Formula The method of automatic control of the crushing complex of United crushers, mainly medium, and fine crushing, including the task for each crusher maximum permissible power values, measurement of the power consumed for crushing by each crusher, change in the feed of the source material to the crusher of medium crushing, size reduction of the crushing crusher’s secondary crushing crusher, reduction of crusher loading when the maximum permissible power values are reached, The fact that, in order to improve the quality of control, the vibration velocity of the body of the crusher of medium crushing at different widths of the discharge gap and the vibration rate of oscillations of the shell and crusher of fine crushing at a constant size of the discharge cracks are measured, and inversely proportional to / 2 T f. Editor E. Papp Compiled by V.Alekperov Tehred M. Khodanich Proofreader N. Korol Order 2231/3 Circulation 572Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, ul. Project, 4 depending on the vibration velocity of this crusher, and changing the size of the discharge gap of the crusher of the average crusher is carried out in inverse proportion to the vibration velocity of the crusher. eleven ten /