给水设计中贸易结算水表表径的计算及计量方式的选择

Calculation & Measurement Method Selection of the Diameter of Trade Settlement Water Meter in Water Supply Design

对国家而言,水表计量精度显示国家的科技实力,直接关系水资源的有效利用;对供水企业来说,水表计量精度直接影响企业的售水率。除受水表本身质量和结构等因素影响外,水表表径选择得当,也可减小计量误差。在一定的市政供水压力和使用流量时,应参照水表特性参数选择最匹配的表径。另外,计量方式的选择,即水表分性质计量和复式水表计量的合理利用也是提高计量精度的有效措施。

For the country, water metering accuracy shows the country's scient ific &technological strength, directly related to the effective use of water resources; for water supply companies, water metering accuracy directly affects the company's water sales rate. In addition to being affected by the quality & structure of the water meter itself, the proper metering of the water meter can also reduce the measurement error. Under the condition of a certain municipal water supply pressure & use flow rate, the most suitable caliber should be selected with reference to the water meter characteristic parameters. In addition, the choice of measurement methods,that is, the measurement of the nature of the water meter and the rational use of the double meter, are also effective measures to improve the measurement accuracy.