The article put forward advices to mend structure of TOBV, and approved the conclusion make use of FEM analysis.It can improve design and capabilities of TOBV.

• 提出了蝶阀结构的改进意见，对改进三偏心蝶阀设计、改善蝶板应力和变形分布、保证其操作及密封性能起到参考作用。