论文部分内容阅读
ZZ3200/11/21型液压支架投用后,由于盘江支护条件的改变顶梁护帮板结构不能适应盘江煤层条件,液压系统反冲洗过滤器通液孔径很小,对水质要求极高,容易堵塞,致使支架无法正常工作,原ZZ3200/11/21型液压系统是本架操纵阀组操,安全系数比较低。支护高度可调整的高度比较小,针对盘江煤层生产工作条件,对顶梁和液压系统部分及支护高度进行了改造,改造后投入效果良好。
After the ZZ3200 / 11/21 hydraulic support is put into use, due to the change of the supporting conditions of Panjiang, the structure of the top guard can not be adapted to the conditions of Panjiang coal seam. The back pressure of the hydraulic system backwash filter is very small and the water quality is very high , Easy to block, resulting in the bracket can not work properly, the original ZZ3200 / 11/21 hydraulic system is manipulated valve group operation, the safety factor is relatively low. Support height adjustable height is relatively small, for Panjiang coal seam production conditions, the roof beam and hydraulic system part and support height has been transformed, put into effect after transformation.