Belt conveyor control system and method for automatically adjusting belt speed according to material flow or material level

Abstract

The invention provides a belt conveyor control system capable of adjusting belt speeds automatically according to material flows or material levels, and belongs to the belt conveyor control technology. The control system comprises a frequency conversion system, a programmable logic controller (PLC) system, a monitoring system and a detection system. The frequency conversion system comprises a power wire inlet device, a power feed device and a frequency converter. The PLC system comprises a power wire inlet control device, a power feed control device and a PLC device. The monitoring system comprises an operation platform and a display screen. The detection system comprises a material sensor which can use a contactless sensor. The control system sets the operation speed of a belt conveyor reasonably according to material flows or material levels and the operation state of a front conveyor and in additional conditions of time and motor currents, and the belt speed is adjusted by the controlling of the output frequency of the frequency converter.

Description

technical field [0001] The invention belongs to the belt conveyor control technology, and proposes a belt conveyor control system and method for automatically adjusting the belt speed according to material flow or material level, and is mainly used in dragging and controlling large and medium-sized belt conveyors. Background technique [0002] In the control system of large and medium-sized belt conveyors, a large number of frequency converters have been used for dragging. In fact, these frequency converters only play the role of soft start, and cannot automatically adjust the belt conveyor according to the flow rate or material level of the conveyed material. There are mainly the following disadvantages: 1) In the absence of human participation in the control, regardless of the presence or amount of materials, the belt conveyor is often in a high-speed operation state, which will accelerate the wear of the rotating parts of the belt conveyor, especially the belt. , affect ...

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Problems solved by technology

[0002] In the control system of large and medium-sized belt conveyors, a large number of frequency converters have been used for dragging. In fact, these frequency converters only play the role of soft start and cannot The belt speed is automatically adjusted according to the material flow or material level being conveyed, which mainly has the following disadvantages: 1) In the absence of human participation in the control, the belt conveyor is often in a high-speed operating state regardless of the presence or amount of materials. , the wear of the rotating parts of the belt conveyor, especially the belt, is accelerated, which affects the service life of these parts, increases the probability of equipment failure and downtime for maintenance, and affects production; 2) Because the service life of the rotating parts, especially the belt, is shortened, Increased spare parts costs and operating costs; 3) increased potential safety hazards; 4) energy consumption; 5) did not give full play to the flexible speed regulation performance of the frequency converter, and the automation level is low

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