Desilting basin sand flushing device and using method thereof

Abstract

The invention discloses a desilting basin sand flushing device and a using method thereof. The invention provides a desilting basin sand flushing device which is installed in a desilting basin; an inlet and an outlet are formed in the two ends of the desilting basin respectively, a funnel-shaped desilting groove is formed in the bottom of the desilting basin; the invention also comprises a pipe body installed below the desilting groove, the bottom of the desilting groove is open, and the pipe body can seal the bottom of the desilting groove and rotate around the axis of itselt; an upstream open hole, a midstream open hole and a downstream open hole are sequentially formed in the pipe body in the axial direction, the upstream open hole is close to the inlet, the downstream open hole is close to the outlet, and an included angle is formed between any two open holes; the end, close to the upstream hole, of the pipe body is sealed, and a sand outlet is formed in the end close to the downstream hole. The invention further provides a using method of the desilting basin sand flushing device. The invention has the beneficial effects that the advantage of high desilting efficiency of a traditional box-type desilting basin is reserved, silt from the upstream to the downstream of the desilting groove can be flushed away while water is guided, the amount of water required for flushing is extremely small, operation is easy, and the influence on power generation benefits is extremely small.

Description

technical field [0001] The invention relates to a grit chamber of a water conservancy and hydropower project, in particular to a grit chamber flushing device and a use method thereof. Background technique [0002] In water conservancy and hydropower projects, the sediment in the river will cause wear and damage to the water diversion structure and the hydroelectric generator unit, and even block the water diversion structure, affecting the normal use of the equipment and threatening the safety and stability of the entire project. At present, box-type grit chambers are mostly used to intercept and settle sediment. [0003] Traditional box-type grit chambers are generally equipped with an open sand washing tank at the bottom. There are usually two operation methods. One is to close the outlet of the sand washing tank at ordinary times, and open the valve of the sand washing tank to wash sand after the sediment has accumulated to a certain height. ; The second is to wash sand ...

AI Technical Summary

Problems solved by technology

The former mainly flows out from the downstream of the sedimentation tank, which can effectively discharge the tail sediment, but the sediment located in the upstream of the sedimentation tank cannot be completely discharged, and often needs to be cleaned manually; the latter flushes sand while diverting water, and cannot effectively control the flow of sand washing , most of the river water flows away in vain, causing a large amount of water energy loss and seriously affecting economic benefits

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