文献类型：专利

英文题名：Pre-impact improvement device used for safety valve structure, comprises fixed pedestal, vertical guide bar, resurfacing welding layer, counter, safety valve seat, and drop hammer

作者：CHEN H;TU S;YU X;WANG Z;XUAN F;ZHANG J;YANG L;ZHOU S

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY

申请号：CN104451077-A

申请日：2014-11-04

公开日：2015-03-25

语种：英文

收录：DERWENT

摘要：NOVELTY - A pre-impact improvement device comprises fixed pedestal (5), vertical guide bar (3), resurfacing welding layer, counter (1), safety valve seat (4), and drop hammer (2). USE - Pre-impact improvement device used for safety valve structure. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for application of pre-impact improvement device. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of pre-impact improvement device. Counter (1) Drop hammer (2) Vertical guide bar (3) Safety valve seat (4) Fixed pedestal (5)