Automatic spraying system and control method for crusher cavity and belt conveyor

Abstract

The invention belongs to the technical filed of mineral processing technology raise dust treatment and particularly relates to an automatic spraying system for a crusher cavity and a belt conveyor. The automatic spraying system comprises a spraying water supply pipeline and a spraying head arranged on the spraying water supply pipeline and is characterized in that the spraying water supply pipeline is further connected with an automatic control system, the automatic control system comprises a frequency converter, an intelligent digital display instrument, a spraying magnetic valve and connecting leads for connection of all components. The automatic spraying system can achieve intelligent and automatic spraying, performs spraying if mineral aggregates exist, does not perform spraying if mineral aggregates do not exist, has the advantages of being low in investment, quick in cost recovery, high in practicability and the like and has important significance on environment-friendly, safe and civilized production of a mine belt transportation system.

Description

technical field [0001] The invention belongs to the technical field of dust control in mineral processing technology, and in particular relates to an automatic spraying system and a control method for a crusher cavity and a belt conveyor. Background technique [0002] At present, in the ore crushing system, in order to achieve the best efficiency of the ore crusher, the ore belt conveyor is usually driven by frequency conversion speed regulation, and the speed is adjusted to ensure that it has a stable ore supply intensity, so that the ore crusher has a reasonable Utilization rate. The belt conveyor spraying system on the ore belt conveyor uses the detection of the load current of the drive motor and the delay circuit to determine the spray points at the head and tail of the belt. Because the ore crushing system needs speed regulation (adjustment) The delay time of the motor of the crushing machine) is related to the running speed and length of the belt conveyor. The speed ...

AI Technical Summary

Problems solved by technology

The belt conveyor spraying system on the ore belt conveyor uses the detection of the load current of the drive motor and the delay circuit to determine the spray points at the head and tail of the belt. Because the ore crushing system needs speed regulation (adjustment) The delay time of the motor of the crushing machine) is related to the running speed and length of the belt conveyor. The speed of the feeding belt is in the process of adjustment in real time, resulting in inaccurate spray positioning; the working range of the frequency converter configured by the belt conveying motor in the crushing system Between the power frequency (0-50Hz), the current general-purpose current transformer is designed according to the power frequency 50HZ. From the electromotive force calculation formula E=4.44f NΦ, it can be known that when the magnetic flux Φ is constant, the induced electromotive force of the transformer is proportional to the frequency , so when the frequency f is lower than the power frequency, the induced electromotive force is low, resulting in an error in the measured short-circuit current; the three-phase current supplied by the frequency converter to the motor contains high-order harmonic components, which will also cause the detection current value of the current transformer There is a deviation; due to the constant torque load characteristic of the feeding belt, if the current I is used as the detection parameter, the dynamic current will reach 1.1 times the rated current of the motor during the starting or speed-up process (this is determined by the current limit of the frequency converter determined, otherwise it will be higher), which will lead to false start of the sprinkler system, resulting in no material spraying

The above reasons caused the system to work with insufficient precision.

Images