| 摘要 |
A portable flow-measuring device for determining the volumetric flow rate of a flow stream includes a generally cylindrical flow conduit insertable into a sewer pipe and a reservoir member disposed atop the flow conduit and being in flow communication therewith. An inflatable tubular collar is disposed completely around the flow conduit such that when inflated it seals the area between the sewer pipe and the flow conduit such that all flow is funneled into the flow conduit. The reservoir member is closed at one end and includes a weir plate sealingly attached over the opposite and otherwise opened end. As flow enters through flow conduit, reservoir member will fill until the crest of the opening of the weir plate is reached and then this flow will exit from the reservoir member through the opening in the weir plate. The height of fluid flowing through the opening of the weir plate, once the draw down is compensated for, determines the volumetric flow rate of the flow stream in the sewer pipe due to the fact that the weir plate is specifically designed and dimensioned for use with standard flow tables. A rear end plate member is provided with graduations for directly indicating the vertical height of the water level in the reservoir member. The uppermost surface of the reservoir member includes a metering port for installation and use of flow measurement and recording equipment so that flow measurement readings can be taken and recorded automatically.
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