推广应用流量测量新技术

APPLICATION PROMOTION OF THE INNOVATIVE FLOW MEASUREMENT TECHNOLOGY

为加强能源计量工作、实现节能降耗,在大管径、大流量的使用场合有必要将高能耗的能源计量仪表淘汰下来,并推广应用流量测量新技术。为此,从理论和实验两方面分析和论证了这一问题,并提出了新的流量计选型原则:①重复性要好;②系统准确度要较高;③有相当强的流动调整能力,要求较短的直管段,无需流动调整器;④永久压力损失要小、耗能费要少;⑤流量测量的量程比要较宽;⑥有自清扫能力,可测量脏污流体,无需过滤器;⑦耐受流体磨蚀能力要强,性能要长期稳定,可靠耐用无可动部件;⑧检定周期长,使用寿命长;⑨故障率要小,维护与修理费用要少;⑩流量计的购置费与校准费要适中,安装与运行花费要少。国内外大量的实验和测试结果都已证明:“V”型内锥流量计能较好地全面满足以上要求。

To promote energy saving and use energy efficiently, it is suggested to replace the flowmeters with high energy consumption which were equipped in pipeline system which was characterized as large diameter and flow rate by new type of flow measurement instrument. Thus, it was academically and experimentally studied and demonstrated. Meanwhile, type selection principles for the new type flowmeter were put forward. ①good linearity ; ②high accuracy; ③high flow adjustment ability along with short straight pipe section with no flow regulator; ④small permanent pressure loss and low energy consumption; ⑤well designed with wide measurement range; ⑥self-clean function and designed to allow measurement for the contaminative flow with no filter; ⑦robust against corruption caused by flow, stable performance and no need of moving parts; ⑧minimum overhaule and long life expectancy; ⑨minimum maintenance; ⑩economically feasible and low operation and installation cost. It was confirmed by many domestic and international experience and test results that the V-cone flowmeter can well meet the requirements listed above.