Design And Analysis Of Automatical Step-down System Globe Valve

Nuclear power energy is safe, efficient, clean new type source, nuclear power energy will occupy 5% proportion of power in our country in 2020, large-scale advanced PWR- our country science and technology projects is one of 16 major r&d projects of the ?national medium and long-term program for the development o ?f science and technology, it will be competitive for for company in China's nuclear power valve to development Automatic decompression system cut-off valve also benefit on key valve product self-designing and manufacture. After finishing the work of designing and development, our country dose not need import the similar type valve. It will make the company high level on competition and occupy the big proportion on nuclear product, at last displace the import product.This article gives detail of the research and development process of the cut-off valve on development and qualification test. for the requirement of the valve of the high temperature and high pressure, high seismic level and low leakage, two phase flow and the flow characteristic of medium etc function we finished the valve designing, pressure boundary flow field characteristics, earthquake load analysis with the cad software ANSYS and FLUENT, it pass experts audit it conforms on requirement of stand and code on valve structure design, material selection and test, the stress calculation and analysis of different parts, technical process, inspection, all above meet the original request.Considering on the function, the selection of the optimal scheme, design it gives the sketch design. The flange+winding gasket construct for body and cover seal; balanced disc structure and press disc type structure for Disc construct; Forging process, heat treatment, machining process and welding process is reasonable. the stress value of material of each parts of pressure boundary and key components is less than that of material allowable stress, it is concluded that the valve meet the flow field characteristics and seismic properties requirements according to the analysis result, also meet the designing and service parameter according to the test result. It is severely meaningful article for designing the similar product...