Study and optimize the technical parameters of the main valve has a very important significance

Since marine nuclear power plant a special structure of the loop, we must set the main valve in the loop to control the primary coolant flow direction. Because hedge check valve which has novel design principle, the characteristics of simple structure, so the circuit  High pressure ball valve  power plant a very broad application prospects. Hedge check valve of the performance indicators for the safety of nuclear reactors have a major impact, the study and optimize the technical parameters of the main valve has a very important significance. In previous studies, this paper, based on the prototype for hedge type check valve in the experiment  Instrument manifolds  flow will not shut off the problem of lax, the main check valve structure presents two improvements. The use of pre-processing software to establish the main valve geometry, meshing, CFD software to use these two structures were improved drag coefficient, flow characteristics and valve head the force of these three aspects of the analysis, and based on the numerical simulation results, completed a hedge check valve structure optimization, increasing the main valve in the closed valve when the hydraulic power to determine the conduct of hedge-type check valve stamping tube diameter increases and the use of these two activities in the seat structure improvements.