先导式安全阀试验与回座失效分析

Pilot Operated Safety Valve Test and Re-seating Failure Analysis

先导式安全阀是工业生产重要的安全保护元件,GB/T 28778-2012对于先导式安全阀的回座压力有比较严格的要求,实际试验过程发现,一些先导式安全阀启闭压差过大、回座压力太小,甚至个别先导式安全阀存在起跳不回座现象。以某公司AF46Y-25型先导式安全阀为例,研究其导阀结构,分析其动作过程,开展动作性能试验,并进行受力计算分析,探讨该先导式安全阀回座失效的原因。

Pilot safety valve is an important safety protection component in industrial production. GB/T 28778-2012 has stringent requirements for the return pressure of pilot safety valve. In the actual test process, it was found that some pilot safety valves have too large open-close pressure difference, too small return pressure, and even some pilot safety valves do not take off. Taking the pilot safety valve AF46 Y-25 of a company as an example, the structure of the pilot safety valve is studied, its action process is analyzed, the action performance test is carried out, and the force calculation and analysis are carried out to explore the reasons for the failure of the pilot safety valve seat.