MEASURING METHOD OF FLOW RATE IN FLOW RATE MEASUREMENT WATERWAY, AND WATERWAY DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a waterway device of a flow rate measurement waterway that changes any water flow to natural flow as much as possible by making the flow speed constant on the upstream of a flume type flowmeter, and stabilizes the water flow passing through the flume type flowmeter.;SOLUTION: In a duct 8 on the upstream of a manhole 3 in which a flume type flowmeter is installed, a rectification passage CR that reduces the flow speed to create natural flow by meandering the water flow in the lateral direction is disposed. The rectification passage CR is formed of a plurality of rectification plates 23 arranged in the direction orthogonal to the flow direction of the water flowing in the duct 8. The rectification plates 23 are arranged in a laterally zigzag shape at a predetermined interval in the water flow direction.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT