A load control method for a belt conveyor

Abstract

The invention discloses a method for controlling belt conveyor loads, and a belt conveyor is driven by a motor. The controlling method comprises the following steps of A1, calculating corresponding reactive power by a load evaluating unit according to the rated voltage, current and power of the motor of the belt conveyor, creating a mapping relation table among the voltage, current, active power and reactive power of the motor of the belt conveyor and the belt conveyor loads; A2, acquiring real-time voltage and current of the motor of the belt conveyor by an electrical parameter acquiring module, calculating the real-time active power and reactive power of the motor of the belt conveyor by the load evaluating unit , and obtaining the real-time loads of the belt conveyor according to the mapping relation table; A3, judging whether the belt conveyor has a fault or not by a PLC (Programmable Logic Controller) according to the real-time voltage and current of the motor of the conveyor, if no overloads are present, adjusting the speed of the belt conveyor by a speed calculating module according to the real-time loads.

Description

technical field [0001] The invention belongs to the technical field of industrial control, in particular to a load control method of a belt conveyor. Background technique [0002] The belt conveyor has become an important equipment in modern industrial production due to its low cost, reliable and stable operation and other advantages. When the belt conveyor is designed, it is generally considered according to the maximum transport capacity it can carry. In actual work, due to the uneven distribution of materials, the operating load of the belt conveyor varies greatly. When the actual transmission power of the belt conveyor is far less than its design power, the phenomenon of "big horse-drawn trolley" will appear. Keeping the belt conveyor running at a constant speed not only causes a huge waste of energy, but also reduces the service life of the belt conveyor. Therefore, it is particularly important to intelligently adjust the speed of the belt conveyor according to the l...

AI Technical Summary

Problems solved by technology

[0003] Traditional load forecasting uses material flowmeters to count materials. However, for massive materials such as iron ore and copper ore, it is obviously impossible to obtain satisfactory results.

[0004] There is also a method of installing an electronic scale under the tight side belt conveyor, such as figure 1 As shown, from the model of the belt conveyor, it can be seen that the pressure acting on the electronic scale is not only from the material itself, but also from the pressure generated by the weight of the tight belt itself, and the friction between the belt and the idler on the electronic scale. pressure, so the accuracy of this method is not high

[0005] There are also methods to evaluate the load based on current or rotational speed. However, these methods are only estimated based on a rough correspondence, with single parameters and low reliability.

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