A Study And The Virtual Design Of The Hydraulic Support With Whole Roof Beam

Thin coal seam mining height is low, the pedestrian is difficult, personnel operatinginconvenience, mining is difficult.Desire in thin coal seam mining in coal mine ofhydraulic support help mining, can realize the automatic control to improve theproductivity, so as to realize mining working face unattended operation, reduce thenumber of underground workers, improve working conditions for workers, reduce thehappening of the accident.Hydraulic support electro-hydraulic control system performance is good or bad, isa key part of the hydraulic support reliability and practicability.Since the advent ofhydraulic support electro-hydraulic control, the user has always wanted to have highreliability, convenient operation of the electro-hydraulic control system.This thesisZY3200/d08/18hydraulic support as the carrier, using high reliability of PLC controlto improve the reliability, the advantages of low cost.PLC can use a variety ofprogramming languages, including the ladder diagram language is similar to "relay-contactor control circuit diagram, it is easy to grasp, make the programming,maintenance and debugging easier, reduces the levels of knowledge requirements formaintenance personnel, at the same time reduces the cost of software, has highpracticability and value of popularization.This thesis mainly do the following designwork:1, the overall design of electro-hydraulic control system.Including theelectro-hydraulic control system hardware structure, the program design of PLCcontroller and communication between support and so on.Analysis of hydraulic supportelectro-hydraulic control system at home and abroad, on the basis of Siemens S7-200PLC as the controller, using Profibus bus as the communication bus, to complete thefunctions of hydraulic support electro-hydraulic control system.2, electro-hydraulic control system software design.According to the needs of mineproduction, hydraulic support in order to achieve the following functions: automaticmachine with function, left and right adjacent separate action, group action, emergencystop.STEP7-MicroWIN SMART completed PLC programming work.Hydraulicsupport with the method of Profibus bus communication between the controller and thehost to the station polling way to communicate, to complete the hydraulic support of the various functions.