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1事故简介我单位一台国内某厂生产的QY8型起重机，在内昆铁路建设工地进行吊装作业时，不慎倾翻，造成吊臂第二节箱型臂杆和控制第二、三节臂杆同步伸缩的液压缸缸筒严重损伤。但由于倾翻时，液压缸活塞杆处于完全伸出状态，故活塞杆及活塞部分未受损伤。损伤的液压缸弯曲变形
1 accident brief introduction I unit a domestic factory production QY8 crane, construction site in Neijiang railway hoisting operations, accidentally tipping over, resulting in boom second box type boom and control the second and third boom Synchronous telescopic cylinder cylinder serious injury. However, due to tipping, the hydraulic cylinder piston rod is fully extended state, so the piston rod and piston part intact. Damaged hydraulic cylinder bending deformation