Optimization analysis of right angle elbow of directly buried heating pipe

Proposes a new type of elbow structure to reduce the maximum stress value of elbow and balance a stress value of its inner and outer layers. Studies the effect of the new elbow structure parameters on the maximum stress value with finite element method, and carries out an optimal analysis of the new elbow structure parameters. Through quantitative analysis of the influence of fin height and fin thickness on the maximum stress value of the new bend pipe, optimizes the new bend pipe. Through quantitative analysis of the maximum stress value of the bend pipe with the parameters of wall thickness and radius of curvature, obtains a change law of the maximum stress value with different parameters. The results show that compared with traditional elbow pipe and traditional elbow with heavy wall thickness, the new bend pipe can greatly reduce the maximum stress and effectively improve the bearing capacity, and the maximum stress value of the new bend pipe decreases with the increase of wall thickness and the radius of curvature.