An uninterrupted measurement system for the mass-sediment rate in an open channel flume

Abstract

The invention relates to an open channel water channel bed-load transport rate ceaseless measuring system and belongs to the technical field of hydraulic measurement. The system comprises a measuring box, a weighing instrument, a flow guiding plate, a sand collecting basket, a sand discharge basket, a traction mechanism, a hoisting mechanism and a hoisting rope. The measuring box is installed below a bottom plate on the upstream of the outlet cross section of a water channel. The weighing instrument is installed above the measuring box. The bottom of the weighing instrument is higher than the horizontal plane of the water channel. The flow guiding plate horizontally covers the top end of the measuring box and is flushed to the upper surface of the bottom plate of the water channel. The sand collecting basket is hung on the portion, below the flow guiding plate, in the measuring box through the hoisting rope. One end of the hoisting rope is connected with the top end of the sand collecting basket, and the other end of the hosting rope is connected with a weighing hook at the bottom of the weighing instrument. The sand discharge basket is flatly placed on the portion, under the sand collecting basket, in the measuring box. The traction mechanism is arranged below and beside the sand discharge basket. The hoisting mechanism is located on the side face of the sand collecting basket, installed above the top of the measuring box and flexibly connected with the sand discharge basket. The system can continuously and ceaselessly measure the bed-load transport rate of any particle size under the condition that an experiment is not disturbed.

Description

technical field [0001] The invention belongs to the technical field of water conservancy measurement, and in particular relates to equipment for continuously measuring the transported mass and sediment transport rate of open channel water tanks. Background technique [0002] The evolution of natural rivers is the result of the interaction between water flow and sediment. Among them, the main form of sediment transport in most rivers is the drift mass with rolling, sliding and jumping as the main movement forms. Due to the extremely complex mechanism of sediment movement, experimental observation is currently the main method for carrying out mass movement. Among them, the construction of open channel tanks (river engineering models) in the laboratory is an important way to carry out mass transport experiments. [0003] The sediment transport rate is the mass of sediment passing through the section of a river or flume per unit time, and the unit is kg / s. In order to accuratel...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the condition of prior art interference experiment, can not continuously measure the deficiencies of the mass-sediment rate of any particle size without interruption, and proposes a continuous measurement system for the mass-sediment rate of open channel tanks; the system can Under the condition of not interfering with the experiment, continuous and uninterrupted measurement of the sediment transport rate of any particle size

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