Method for measuring flow concentration of turbid water, and priming device

Abstract

The invention relates to a method for measuring flow concentration of turbid water, and a priming device. The method comprises the following steps: (1) in a preparation stage, installing the priming device, and acquiring sediment density pS; (2) in a measurement stage, firstly, adjusting the depth and the angles of priming pipes, turning on the priming device for draining, and connecting into a volume, secondly, weighing the to-be-measured turbid water to obtain the mass M, and measuring the volume V of the to-be-measured turbid water, thirdly, calculating the density p of the turbid water and the density pW of clear water, wherein p is equal to M / V, and pW is equal to MW / VW, fourthly, calculating sediment volume concentration, and finally, calculating the flow concentration CQ which is equal to (QS.t) / (Q.t) or QS / Q or NV. The priming device comprises a priming elbow pipe, a flange arranged on a priming straight pipe in a sleeved manner, three screws evenly fixed on the lower surface of the flange in the circumferential direction, the priming straight pipe arranged below the flange in a sleeved manner, a graduation disc on the three screws, a positioning disc fixed on the priming straight pipe and arranged on the three screws in a sleeved manner, and a valve on the tail end of the priming straight pipe. The method can be widely applied to the measurement on the flow concentration of turbid water.

Description

technical field [0001] The invention relates to a measuring method and device, in particular to a method for measuring the flow concentration of muddy water and a water diversion device. Background technique [0002] flow concentration C Q Refers to the flow Q of solid particles such as sediment in muddy water (hereinafter collectively referred to as sediment) S and the ratio of the total flow Q of muddy water, and its volume concentration C V (sediment volume V S 'to the total volume of muddy water V') and the mass concentration C M (sediment quality M S It is similar to the ratio of the total mass of muddy water M), but the concept is different. [0003] In a pressurized flow, the area of ​​a straight pipe with a length L is A, assuming that the flow area occupied by sediment is A S , then the volume concentration C V =V S ' / V'=A S ·L / (A·L)=A S / A, that is, the volume concentration C V In fact, it reflects the sediment flow area A S and the ratio of the total a...

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Problems solved by technology

[0005] As far as the measurement of sediment concentration is concerned, there are still two problems to be solved urgently: one is the volume concentration C V Due to different measurement sections, the volume concentration C of any section V cannot represent the concentration in the entire pressurized pipeline; the second is that although the flow concentration C Q It can keep all cross-sections equal, and can also represent the concentration in the pressurized pipeline, but there is no measurement method and equipment at present

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