Anti-impact device for hydraulic bracket

• Main Authors: ZHANG DESHENG, WANG BIAOMOU, ZHU JUN, XU YAJUN, LIU CHENGFENG, LYU DONGLIN, LI DINGYI, CHENG JUN
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2019
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention belongs to a coal mine safety device, and particularly relates to an anti-impact device for a hydraulic bracket. Anti-impact energy absorbing protection pads are arranged between a socket of a hydraulic bracket and the bottom of a vertical column and between a cap of the hydraulic bracket and the head of the vertical column; an energy absorbing filling liquid is arranged in the socket and a cavity of the cap; when the hydraulic bracket is impacted by a top plate and a bottom plate during the protection process, in an instant that a safety valve of the vertical column has no timeto be switched on, the anti-impact energy absorbing protection pads dissipate impact energy through the phase change effect, and the impact force is reduced; when the hydraulic bracket is subjected tolarge impact by the top plate and the bottom plate, after the safety valve of the vertical column is switched on, the impact load applied to the hydraulic bracket cannot be resisted, the socket and the cap are subjected to ce