A sand settling circulation device for test tailings in a wave-flow flume

Abstract

The invention relates to the technical field of hydraulic model tests, and provides a sand settling circulation device for tailing sand in a wave flow tank test. A sand collection device is installed at the front end of the tailgate of the main body of the tank to remove the sand with a larger particle size. For one collection, a sand-water separation device is installed at the end of the main body of the water tank to separate sand and water from the energy-dissipated tail water. The sand-water separation device includes a collection bucket and a sand suction device installed in the collection bucket. For the secondary collection of suspended sand bodies with small particle sizes, a drain port is provided on the upper part of the collection bucket, and the separated clean water flows into the clean water reservoir through the return pipe for recycling, and intelligent control is carried out by setting a computer. It not only completely solves the problems existing in the traditional sand settling system, but also effectively reduces the test cost.

Description

technical field [0001] The invention relates to the technical field of hydraulic model tests, in particular to a sand settling circulation device for tailing sand in a wave flow tank test. Background technique [0002] The sediment movement test is one of the important components of the hydraulic model test. In marine and coastal engineering, such as the turbulent structure of the sand-carrying water flow and the law of sand delivery, the relationship between turbulent flow burst and sediment movement, etc. must be determined by the sediment movement test. Complete, therefore, in the flume model test, using wave flow dynamics to do the above-mentioned mud-sand movement test requires water-sand separation treatment of the test tailings, and continuous long-term cycle conversion. [0003] At present, the method of installing a herringbone tailgate at the end of the tank and installing a sand collection cup at the front end of the tailgate is often used in the wave flow tank to...

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Problems solved by technology

But in fact, due to factors such as hydrodynamic forces, the sand collection cup can only collect 50%-65% of the test tailings, and the collected sand is basically the bottom sand with large self-weight and coarse particles; while the bottom sand with small self-weight and fine particles The suspended sand cannot be collected by the sand collection cup, causing the tailing sand to enter the return channel with the water flow downstream of the wave flow tank, and then enter the test clean water reservoir. Over time, the clean water reservoir will accumulate a large amount of test tailing sand, resulting in turbid water in the clean water reservoir , the water body cannot be used for other clear water tests, that is, it cannot be recycled, resulting in a large amount of water waste

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