消防水系统梭式止回阀的结构优化

Structure Optimization of Shuttle Sheck Valve in Fire Water System

为了满足消防水系统的技术要求,需要改善由于原梭式止回阀体和阀瓣轮廓线转折尖锐阀,造成的阀体内流体有较大压力梯度,梭式止回阀震动,流阻大和水锤现象较大的缺点。本文利用FLUENT软件进行数值模拟分析,对阀体进行了优化设计。分析比较了优化前后的宏观速度、静压力和流阻力系数。结果表明:优化后的阀体内流道线形曲率半径增大,内轮廓线光滑平顺,流体在阀内的流速稳定,增大了止回阀的流通能力,漩涡强度减小;阀芯受力均匀,流体对阀芯的水击力较小,流动阻力减小;阀门整个开启过程中优化后的止回阀流阻系数至多相对降低量53%,有效提高了防水锤特性。

In order to meet the technical requirements of the fire water system,it is necessary to improve the original shuttle check valve body and the sharp turn of the disc contour.These problems can result in some shortcomings,such as the valve body fluid has a large pressure gradient,shuttle check valve vibration,high flow resistance and water hammer phenomenon.In this paper,FLUENT software was used for numerical simulation analysis,and the valve body was improved.The macroscopic velocity,static pressure and flow resistance coefficient before and after optimization were compared.The results show that the optimized flow path curvature radius increases,the internal contour line is smooth,the flow velocity of the fluid in the valve is stable,the flow capacity of the check valve increases,and the vortex strength decreases.The force of the spool is uniform,and the hydraulic force of the fluid on the spool is small,and the flow resistance is reduced.The optimized flow resistance coefficient of the check valve is reduced by53%during the entire valve opening process,effectively improving the waterproofing hammer characteristics.