Dual main machine crushing production line and method based on frequency conversion control technology

Abstract

The invention discloses a dual main machine crushing production line and method based on the frequency conversion control technology. The dual main machine crushing production line comprises a shapingmachine and a sand making machine. A discharging opening of the shaping machine and a discharging opening of the sand making machine are connected with a feeding opening of a vibration screening mechanism through an operating belt. The vibration screening mechanism comprises a vibration screen and a material divider. The shaping machine, the sand making machine and the material divider are connected with a PLC control system. By means of the frequency conversion control technology of the PLC control system, the shaping machine and the sand making machine achieve frequency conversion starting,the rotating speed and frequency of the sand making machine are adjusted and controlled, the division proportion of the material divider can be adjusted and controlled, impacting to a power grid during motor starting is effectively avoided, the stability is good, and the safety coefficient is high; and the production proportion of various discharged materials is flexibly controlled, the materialsare reasonably divided, the control precision is high, and high efficiency and energy saving are achieved.

Description

technical field [0001] The invention relates to a dual-main crushing production line and method based on frequency conversion control technology, belonging to the technical field of sand making equipment. Background technique [0002] At present, in the conventional crushing production line, the sand-making crushing section mostly adopts single-main finished sand. Specifically, the material is crushed through the vertical shaft crusher and enters the screening system. The qualified product enters the finished product warehouse through the finished product belt conveyor, and the oversized material passes through the return belt conveyor. It is conveyed back to the vertical shaft crusher for mechanical crushing. The advantage of this conventional crushing production line is that it saves equipment investment, but it has a single function and can only be crushed in a single stage, and gradation adjustment cannot be performed; It is more troublesome to operate than to realize. ...

AI Technical Summary

Problems solved by technology

The advantage of this conventional crushing production line is that it saves equipment investment, but it has a single function and can only be crushed in a single stage, and gradation adjustment cannot be performed; It is more troublesome to operate than to realize

In addition, if the single host process only produces finished sand, the crushing ratio is small and the output is low

If it is necessary to increase the output, it must be realized by reducing the feed particle size. To reduce the feed particle size, a section of crushing must be added, which will also increase equipment investment.

[0003] In addition, in the crushing production line, when the sand making vertical shaft crusher is started and stopped, the conventional method is a step-down start or soft start method. Since the motor power of the vertical shaft crusher is relatively large, it will have a large impact on the power grid when starting the motor, which is dangerous. The coefficient is high, and it may fail to start when the voltage is lower than 380V, which will affect the stable operation of the crushing production line

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