Development Of Electro-hydraulic Control System For Thin Coal Seam Hydraulic Support

China has abundant reserves of thin coal seams.In the 3.0 era of the coal industry revolution,mechanized coal mining was basically realized,but the degree of automation and intelligent mining was low.The single machine automatic control of the hydraulic support of the fully mechanized mining face mainly relies on the electro-hydraulic control system,which is also the basis for the realization of less humanized and intelligent mining in coal mines.This subject is aimed at the problem that there are fewer domestic electro-hydraulic control systems for hydraulic supports in thin coal seams,and there are many field devices for traditional electro-hydraulic control systems,which are difficult to be widely used in narrow working faces of thin coal seams.Based on the research idea of "centralized remote automatic control of hydraulic support + manual intervention",this paper develops an electrohydraulic control system for hydraulic support of thin coal seams.Through consulting the literature,participating in international coal mine equipment exhibitions and field investigations,etc.,to understand the development of domestic and foreign hydraulic support electro-hydraulic control systems and their application in thin coal seams,the main analysis of domestic mainstream domestic SAC electro-hydraulic control systems and laboratories Existing research results determine the functions and technical indicators that need to be improved during the development of this system;and analyze the uniqueness of thin coal seam mining technology and its hydraulic support.Based on the above theoretical foundation,the overall architecture of the system is established,and the communication scheme and basic functions of the system are designed.Developed the core device of the system,the stent controller.With the goal of integration and miniaturization,the hardware design of the stent controller was selected.A powerful processor was selected to build peripheral circuits to complete the circuit schematic design and PCB board production.Functional requirements,software design in a modular manner.Finally,the hardware and basic function tests of the stent controller were completed through experimental research.The basic functional design of the system was verified in combination with the existing power supply,host computer,electromagnetic pilot valve and sensors in the laboratory.The system developed in this subject has high environmental adaptability and stability,effectively achieves automatic mining of thin coal seams,and provides key technical support for achieving intelligent mining.