Design And Optimization Of The Large Diameter Wedge Gate Valve Structure Gate Valve Structure

The large diameter valve which is widely used in mining, metallurgy, oil and other industries has a small fluid resistance, high reliability, long life and other advantages. Large diameter with larger body cavity, and irregular cross-sectional shape is difficult to use conventional mechanical design theory to calculate strength and design, empirical formula is always used to calculate and design on structural design. But the empirical formula is usually too conservative, thus, leading to a large weight of the large diameter wedge gate valve body, low utilization rate of material, and the inconvenience of the production, installation, commissioning progress. So, we use advanced computer-aided technology in the subject to design and optimize the largediameter wedge gate valves in order to make overall valve more reasonable.First of all, this paper discusses the significance of this subject, as well as makes a presentation on the development in china or abroad of large diameter valves, the pros and cons of various types of valves and analytical methods on current project accessing to a lot of relevant literatures.Secondly, Autodesk Inventor, a three-dimensional design software, is used to the subject three-dimensional modeling for the large diameter wedge gate, especially makes a parametric design for the thickness of the body, the arrangement of the reinforcement and the thickness of the flashboard. Finite element theory and analysis were described in details, we establish a large diameter wedge gate valve finite element model, while making a finite element analysis with the use of finite element analysis software ANSYS Workbench.Finally, we make the finite element analysis for gate and valve. In order to meet the need of structural strength and reduce the weight of valves equipment which are the optimization objectives, optimization targets were constrain analyzed, we draw a graph of maximum stress and design variables, effectively reduces the weight of the valve, optimize the structure size for the thickness of body wall and the reinforcement, also we make a reasonable thickness of flashboard optimization. After optimization, the body reduces the maximum stress by 4.39% and the maximum equivalent stress flashboard by 16.0%, so that the body and the flashboard of the overall design are more reasonable, at the same time it can effectively reduce development and production costs and have a significance on large diameter valve design.