理化检验-物理分册2026，Vol.62Issue(8)：72-76,5.DOI:10.11973/lhjy-wl260197
核电厂设备冷却水系统蝶阀内衬开裂原因
Reasons for cracking of butterfly valve lining in cooling water system of nuclear power plant equipment
陆明健 1韩传伟 2王文奎 1陆靖秋 2田闯1
作者信息
- 1. 大亚湾核电运营管理有限责任公司,深圳 518120
- 2. 苏州热工研究院有限公司,苏州 215000
- 折叠
摘要
Abstract
The butterfly valve lining in the cooling water system of a nuclear power plant equipment was cracked.The reasons for the cracking of the butterfly valve lining were analyzed using macroscopic observation,low magnification inspection,mechanical property testing,scanning electron microscopy and energy spectrum analysis,and medium resistance testing.The results show that the geometric structure of the joint between the inner lining shaft hole and the reinforcing rib of the butterfly valve underwent a sudden change,resulting in stress concentration and the initiation of fatigue cracks.Due to the low tear strength of the material,the cracks rapidly propagated outward from the joint between the shaft hole and the reinforcing rib.There were manufacturing defects inside the material,and the use of Vaseline lubricant deteriorated the performance of the lining material.Under long-term cyclic stress,the butterfly valve lining eventually experienced fatigue cracking.关键词
蝶阀内衬/三元乙丙橡胶/疲劳开裂/应力集中/凡士林润滑剂Key words
butterfly valve lining/EPDM rubber/fatigue cracking/stress concentration/Vaseline lubricant分类
通用工业技术引用本文复制引用
陆明健,韩传伟,王文奎,陆靖秋,田闯..核电厂设备冷却水系统蝶阀内衬开裂原因[J].理化检验-物理分册,2026,62(8):72-76,5.
