空气阀缓冲阀瓣对水锤防护效果分析

Analysis of the protective effect of air valve’s buffer flap against water hammer

长距离输水管道为有效控制弥合水锤,空气阀在结构上应具备快速进气缓慢排气特性。为研究缓冲阀瓣孔径大小、安装位置对空气阀水锤防护效果的影响。绘制了7组不同孔径大小缓冲阀瓣,分别布置阀体上端和阀体下端。利用Fluent计算流体软件求取了空气阀进排气流量特性参数;通过Hammer水力计算软件对安装该空气阀的输水管道,进行水锤防护效果分析。结果表明空气阀缓冲阀瓣布置在阀体上端对水锤防护性能好,缓冲阀瓣通流面积与空气阀出流面积比值为0.025时,其水锤防护达到安全范围以内。

In order to effectively control the water hammer, air valve structure should have the characteristics of rapid intake and slow exhaust. In order to study the influence of the aperture size and installation position of the buffer valve flap on the water hammer protection effect of the air valve, Draw 7 size of the aperture buffer valve flap, respectively arrangement the upper valve body and the below valve body. Using Fluent fluid software to calculate the air valve inlet and exhaust flow characteristics of the parameters. By hammer hydraulic calculation software analysis water hammer protection effect to installed air valve on the water pipeline. The analysis results show that the air valve buffer valve flap is arranged on the upper of the valve body and has a good protection against water hammer. When the ratio of the area of the buffer valve flap flow to the air valve out- let area is 0. 025, the water hammer protection reaches the safe range.