Flow Field Characteristics and Structure Improvement of Double-stage Safety Valve

The paper proposes a new double-stage large flow protection relief valve based on the linkage structure, to solve problem that when it is impacted by top plate, traditional hydraulic support protective has smaller overflow and lower sensitivity, which causes column circuit be damaged. field characteristics of are numerically simulated computational fluid dynamics method semi-implicit connection pressure equation calculation model. Then dynamic distribution obtained. According law flow, structure main core optimized for negative pressure, cavitation vortex area. analyzed. In end, compared with original. results show value reduced 15%, outlet velocity 21% unoptimized fully opened. research provide reference evolution design high-flow, impact-resistant safety structure.