石油化工企业需通过循环水作为冷却器冷却用,而输送循环水的管道较粗,一般管径为(600~1000)mm,有的还可能在1m以上。循环水水质比较污浊,管道里经常会有塑料布、纤维杂质、泥土等脏物。用于大口径测量的流量仪表很多,金陵石化先后使用过插入式电磁流量计、插入式涡街流量计、插入式涡轮流量计以及差压式孔板流量计。在测量中,有的流量仪表因可动机械部件被杂物缠绕,导致计量准确度下降,甚至不 Petrochemical enterprises need to use circulating water as a cooler for cooling, while the circulating water pipeline is thick, the general diameter (600 ~ 1000) mm, and some may also be more than 1m. Circulating water quality is relatively dirty, the pipe often have plastic cloth, fiber impurities, dirt and other dirt. For large-diameter measurement of flow meters, Jinling Petrochemical has used a plug-in electromagnetic flowmeter, plug-in vortex flowmeter, plug-in turbine flowmeter and differential pressure orifice flowmeter. In the measurement, some flow meters due to debris moving mechanical parts winding, resulting in decreased measurement accuracy, or even not