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腰轮流量计是计量原油体积的计量仪表，其误差曲线由检定流量计所得，而相邻两次检定流量计所得的误差曲线是不同的，即误差曲线发生移动，这样对原油计量的准确性产生影响。为了提高计量的准确性，避免误差曲线大幅度移动，用定性分析方法分析了腰轮流量计误差曲线移动的原因。发现主要原因有：①流量计漏流量的影响；②检定系统工艺流程的影响；③标准体积管内壁结蜡及环境温度的影响。建议采取如下措施：①缩短流量计的检定周期；②使检定工艺流程满足检定系统的要求；③检定前对体积管进行清蜡处理；④对体积管进行保温。
Roots flowmeter is a measure of the volume of crude oil measuring instrument, the error curve obtained by the test flowmeter, and the error curve obtained two adjacent test flowmeter is different, that is, the error curve is moving, so that the accuracy of the measurement of crude oil Have an impact. In order to improve the accuracy of measurement and prevent the error curve from moving greatly, the reason why the error curve of the waist flowmeter moves is analyzed by qualitative analysis method. The main reasons are: ① flow meter leakage effects; ② test system impact of the process; ③ standard volume tube wall waxing and the impact of ambient temperature. Proposed to take the following measures: ① shorten the test cycle of the flow meter; ② test process to meet the requirements of test system; ③ test before the volume tube waxing treatment; ④ volume tube insulation.