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Sink-type top inflow sand flushing gallery structure

A corridor and sand flushing technology, which is applied in water conservancy projects, hydropower stations, traditional hydroelectric energy, etc., can solve problems that endanger the structural safety of sand flushing tunnels, prevent cavitation damage, ensure safety, and reduce project investment Effect

Inactive Publication Date: 2012-01-04
POWERCHINA HUADONG ENG COPORATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

When the sand flushing tunnel needs to participate in flood discharge, due to the high flow velocity in the tunnel during flood discharge operation, suction vortices are likely to be generated above the sand flushing corridor, which endangers the safety of the sand flushing tunnel structure

Method used

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  • Sink-type top inflow sand flushing gallery structure
  • Sink-type top inflow sand flushing gallery structure
  • Sink-type top inflow sand flushing gallery structure

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Embodiment Construction

[0015] For hydropower stations built on silt-rich rivers, in order to prevent large particles of silt from entering the turbines of the power station, a desilting basin is usually built before the water inlet. Such as Figure 1-Figure 4 As shown, this embodiment includes a corridor main body 1 (made of C50 anti-scouring and wear-resistant concrete) located at the front of the sand washing tunnel and integrally arranged in the rock body at the bottom of the grit chamber. The angle is generally controlled at 70-90°, keeping a certain distance from the front edge of the water inlet (in order to simplify the structure, the sand flushing corridor should be as far away from the water inlet as possible, but the water inlet should be within the range of the sand flushing funnel), and the water flow outlet It is connected with the entrance of the flushing cave. The cross-section of the corridor main body 1 is in the shape of an inverted city gate with a round top and bottom; a group o...

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Abstract

The invention relates to a sink-type top inflow sand flushing gallery structure, aiming to solve the technical problem of providing a sink-type top inflow sand flushing gallery structure which has simple structure and is convenient to construct. Silt along the sand flushing gallery can be removed; meanwhile, no dirt is accumulated on a power generation water inlet; during the working condition of flood discharge, suction eddy appearing above the sand flushing gallery can be eliminated to guarantee the safety of sand flushing cave structure. The technical problem for solving the problems is that the sink-type top inflow sand flushing gallery structure comprises a gallery main body, wherein the top of the gallery body is provided with one group of inflow holes. The sink-type top inflow sand flushing gallery structure is characterized in that one group of eddy beams is evenly distributed above the gallery body. The sink-type top inflow sand flushing gallery structure is mainly used in the hydropower station engineering, especially in the hydropower stations of rivers with more sand.

Description

technical field [0001] The invention relates to a sand washing gallery structure, in particular to a sunken top inflow sand washing gallery structure, which is mainly suitable for hydropower station projects, especially hydropower station for rivers with many sediments. Background technique [0002] For hydropower stations built on silt-rich rivers, in order to keep the water inlet of power generation "clear in front of the gate", sand washing holes are often arranged in front of the water inlet. When the shore water diversion power station has multiple diversion tunnels and the water inlet is spread out laterally, it is possible to arrange multiple sand washing tunnels to expand the range of sand washing; it is also possible to arrange only one sand washing tunnel and The sand flushing corridor is arranged in the front, so that the sand flushing effect extends to the front of multiple power generation water inlets. The latter has flexible layout and low investment. When t...

Claims

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Application Information

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IPC IPC(8): E02B9/04
CPCY02E10/22Y02E10/20
Inventor 黄东军余雪松陈振文
Owner POWERCHINA HUADONG ENG COPORATION LTD
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