Sediment removal system and method for preventing sediment accumulation at canal bed of canal and

Abstract

The invention provides a sediment removal system and a method for preventing sediment accumulation at a canal bed of a canal. The sediment removal system comprises a V-shaped vortex pipe and siphons, wherein the V-shaped vortex pipe is positioned at the canal bed of the canal, and is used to form spiral flows; a V-shaped sharp corner points to the direction opposite to the direction of a water flow; openings are formed in the water flow facing sides of the vortex pipe; the tail ends of the vortex pipe are close to the bottom of a canal bank of the canal; one end of one siphon is communicated with one tail end of the vortex pipe correspondingly; and the other ends of the siphons bypass the tops of the canal bank to extend to the outer sides of the canal. According to the sediment removal system and the method, the flow speeds of helical flows along the axial directions of the vortex pipe can be increased through the siphons, so that the sediment removal efficiency is improved, the sediment removal system is green and environmental-friendly; in addition, the siphons bypass the top of the canal bank to extend to the outer sides of the canal, so that the impact on the structural strength of the canal bank is avoided; moreover, the vortex pipe of the sediment removal system is V-shaped, so that the two helical flows flowing to the two tail ends of the vortex pipe respectively can be formed, the siphons can be arranged at the two tail ends of the vortex pipe, and the sediment removal efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of sediment dredging at the bottom of a diversion channel of a hydropower station, in particular to a method and a sand discharge system for preventing sediment deposition at the bottom of a water channel. Background technique [0002] Sediment problems plague many water conservancy projects. The diversion channel of the hydropower station is difficult to operate due to sedimentation, the service life of the reservoir is shortened due to sedimentation, and the hydraulic machinery is severely worn due to the sand entrained by the water flow, resulting in a significant reduction in efficiency. [0003] At present, in order to achieve sand discharge, it is usually necessary to design a sand discharge channel at the bottom of the dike of the canal, and the sand discharge channel passing through the dike will undoubtedly affect the structural strength of the dike, bring certain safety hazards, or reduce the engin...

AI Technical Summary

Problems solved by technology

The diversion channel of the hydropower station is difficult to operate due to sedimentation, the service life of the reservoir is shortened due to sedimentation, and the hydraulic machinery is severely worn due to the sand carried by the water flow, resulting in a significant reduction in efficiency

[0003] At present, in order to achieve sand discharge, it is usually necessary to design a sand discharge channel at the bottom of the dike of the canal, and the sand discharge channel passing through the dike will undoubtedly affect the structural strength of the dike, bring certain safety hazards, or reduce the engineering cost of the canal. Therefore, how to discharge sand more safely and at low cost has become a technical problem to be solved urgently by those skilled in the art

Images