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technical article
Intuitive flowmeter installation requirements
2011-8-22 10:47:02

     正确 选择安装点和 正确的 安装流量计都是非常重要的环节, 如果 安装环节失误 影响测量精度, 严重的话还 会影响流量计的使用寿命, 有时 甚至 损坏流量计。 When installing the flowmeter , the correct selection of the installation point and the correct installation of the flowmeter are very important links. If the installation link is wrong, it will affect the measurement accuracy, if it is serious, it will also affect the service life of the flowmeter , and sometimes even damage the flow rate. meter. 街流量计 安装对直管段的要求是非常 For example , the installation of vortex flowmeters has very high requirements for straight pipe sections .

流量计 安装点上的上下游直管段一定的要求,否则会影响测量精度。 1. The vortex flowmeter has certain requirements for the upstream and downstream straight pipe sections at the installation point, otherwise it will affect the measurement accuracy.

1) 如果 流量计 安装点上的上游有渐缩管 现象 那么 流量计上游 的管道直径 15 的等径直管段,下游 的管道直径 5 的等径直管段 ( 1) If there is a tapered pipe upstream of the installation point of the flow meter , the diameter of the pipe upstream of the flow meter should have an equal diameter straight pipe section greater than 15 and the downstream pipe diameter should have an equal diameter straight pipe section greater than 5 ;

2) 如果 流量计 安装点上的上游有渐扩管, 那么 流量计上游 的管道直径 有不 18 的等径直管段,下游 的管道直径 5 的等径直管段 ( 2) If there is a gradually expanding pipe upstream of the installation point of the flow meter , then the diameter of the pipe upstream of the flow meter should have a straight pipe section of equal diameter of not more than 18 , and the diameter of the downstream pipe should have a straight pipe section of equal diameter greater than 5 .

3) 如果 流量计 安装点上游有 90 °弯头或 下行接头, 那么 流量计 上游 管道直径 20 的等径直管段,下游 的管道直径 5 的等径直管段 ( 3) If there is a 90 ° elbow or a downstream joint upstream of the installation point of the flowmeter , then the upstream pipe diameter of the flowmeter should have an equal diameter straight section greater than 20 , and the downstream pipe diameter should have an equal diameter straight greater than 5 . Pipe section

4) 如果 流量计 安装点 上游在同一平面上有 90 °弯头, 那么 流量计上游 的管道直径 25 的等径直管段,下游 管道直径 5 的等径直管段 ( 4) If there is a 90 ° elbow on the same plane upstream of the installation point of the flowmeter , then the diameter of the pipeline upstream of the flowmeter should have an equal diameter straight pipe segment greater than 25 , and the diameter of the downstream pipeline should have an equal diameter straight greater than 5 . Pipe section

流量调节阀或 压力调节阀尽量 安装在流量计下游 管道直径 5 以远处 的地方 如果 必须安装在流量计的上游 的话 那么 流量计 上游应有 25 的等径直管段,下游应有 5D 的等径直管段 (5) The flow regulating valve or pressure regulating valve should be installed as far as possible from the diameter of the pipeline downstream of the flowmeter by 5 or more . If it must be installed upstream of the flowmeter, the upstream of the flowmeter should have an equal diameter greater than 25 . Pipe sections, downstream should have equal diameter straight pipe sections greater than 5D ;

6)如果 流量计 上游有活塞式或 柱塞式泵,活塞式或罗茨式风机、 压缩机 ,流量计上游 的管道直径 应有 25 的等径直管段,下游应有 5 的等径直管段。 ( 6) If there is a piston or plunger pump, piston or roots type fan, compressor upstream of the flowmeter , the diameter of the pipeline upstream of the flowmeter should have an equal diameter straight pipe segment greater than 25 , and the downstream of the flowmeter should be greater than 5 Isometric straight pipe sections.