厚壁容器盲孔的结构分析与设计

Structural Analysis and Design of Blind Holes in Thick Walled Containers

本文是基于粉煤气化导致设备逐渐大型化的背景下,粉煤给料罐大型化后第四类辐射化料位计辐射强度不足的问题,通过对其原因进行分析,并进行盲孔的结构设计。然后借用Ansys15.0分析软件建立模型计算,对盲孔的不同参数(孔径、底部厚度、加强段与否)下的筒体局部应力进行详细的比较,探寻其中的规律,寻找最佳的盲孔参数组合(开孔直径Φ30,深度50mm,保留加强段)。并进行应力分析和路径评定,结果完全满足应力要求。从而借助盲孔结构来解决料位计在大型化设备中存在的问题,节约设备成本,为大型承压厚壁设备局部减薄探寻一种思路。

This article discusses insufficiency of the radiation intensity of the fourth type of radiation level meter after the enlargement of the coal powder feeding tank,under the background that equipment gradually becomes larger due to pulverized coal gasification.By analyzing the reasons for this,the blind hole structure design is carried out.Then,using Ansys 15.0 analysis software to establish a model calculation,a detailed comparison of the local stress of the cylinder body under different parameters of the blind hole (aperture, bottom thickness,and reinforcement section or not) is conducted to explore the patterns and find the best combination of blind hole parameters (hole diameter φ30mm,depth 50mm,retaining reinforced pipe).Also conduct stress analysis and path assessment to fully meet the stress requirements.By utilizing the blind hole structure,the problems of material level meters in large-scale equipment can be solved,saving equipment costs.Exploring a method for local thinning of large pressure bearing thick walled equipment.