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安全阀的结构形式有全启式和微启式两种。识别安全阀的结构形式,区分全启式和微启式,是在锅炉检验工作过程中,核算安全阀的必要知识。识别安全阀结构形式的方法大致如下:1 安全阀金属铭牌上项目齐全的,可根据“提升高度(开启高度)”h和“阀门喉径(流道直径)”d计算确定。h/d≥1/4的,为全启式。2 铭牌上项目不全的,可根据阀门型号来判断。按照JB308—75《阀门型号编制方法》的规定,阀门型号一般由6个部分的代号或数字组成。其中,第三部分的数字
Safety valve structure of the whole Kai-type and micro-Kai two. Identify the structure of the safety valve structure, the distinction between the whole Kai-type and micro-Kai, is the boiler inspection process, the accounting of the necessary knowledge of safety valve. The method of identifying the safety valve structure is as follows: 1 safety valve metal nameplate complete project, according to “lift height (open height) ” h and “valve throat diameter (runner diameter) ” d calculation to determine. h / d ≥ 1/4, for the whole Kai type. 2 nameplate incomplete items, according to the valve model to judge. In accordance with JB308-75 “valve model preparation method” requirement, the valve model generally consists of 6 parts of the code or number. Among them, the third part of the figure