Scraper Conveyor Chain Fracture Monitor System

Scraper conveyer is a kind of continuous transportation machinery,it has the advantages of large transport capacity, wide adaptation environment and simple maintenance.It is widely used in coal mine fully mechanized coal face.Due to the harsh underground production environment, scraper conveyor is uninterrupted operation of the high load, easily broken chain accident occurs, light will influence the production and endangered the safety of equipment and personnel,so the broken chain fault of monitoring system is very necessary.On the basis of analyzing the phenomenon of scraper conveyor chain breaking, the paper analyzes the tension of the scraper chain, and determines the easy breakpoint of chain.Using multi information fusion method,using differential scraper offset distance direct monitoring and head and tail current indirect monitoring method and the broken of the scraper conveyer chain monitoring system overall scheme;The hardware selection of the monitoring system including inductive proximity switch,PLC and touch screen is carried out;Design the monitor cabinet and determine the communication mode between the equipments;And according to the requirement of system design, modular programming ideas,design of fault chains monitoring of the main program,system initialization subroutine,speed and current reading and conversion subroutine,current control algorithm subroutine, scraper offset control algorithm subroutine,broken chain point positioning control algorithm subroutine and PC parameter setting subprogram;Using MCGS embedded software,the software of the configuration software has been developed,and the monitoring interface can be realized,the running status of scraper chain is displayed,the position of chain is displayed,reset and sound and light alarm;Use ForceControl v7.0 software design of the remote monitoring and control interface, including the scraper chain operation interface,motor current monitoring interface,the scraper chain speed monitoring interface, the scraper offset distance monitoring interface, parameter setting interface and alarm display interface;Build the scraper conveyor broken chain monitoring test rig, the scraper offset distance,broken chain point positioning and head and tail current difference monitoring method to verify the broken of the scraper conveyer chain system feasibility.According to the scraper conveyor chain breakage phenomenon and system monitoring system,the design of the broken chain monitoring system is of positive significance for further research and development of scraper conveyor chain breaking monitoring technology.