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Method and device for aeration of pressed inlet of gentle slope open channel

An air device and open channel technology, which is applied in the field of air aeration and corrosion reduction, achieves the effects of good air aeration effect, increased air aeration concentration, and improved air aeration and corrosion reduction effect.

Active Publication Date: 2015-05-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing technology has not been able to solve the problem of cavitation cavitation on the flow wall of the gentle slope open channel.

Method used

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  • Method and device for aeration of pressed inlet of gentle slope open channel
  • Method and device for aeration of pressed inlet of gentle slope open channel
  • Method and device for aeration of pressed inlet of gentle slope open channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The structure of the gentle-slope open channel of this embodiment with the pressure inlet aeration device is as follows: figure 1 , 2 As shown in , 3 and 4, a wedge-shaped aerator 1 is set at the end of the pressure inlet of the gentle slope open channel at a distance of 0.5m from the bottom of the flow tunnel, and the height ratio of the water outlet below it to the water outlet above it is 1:1. The wedge-shaped aerator is a hollow wedge-shaped section structure, and is horizontally arranged on the holes 4 on both sides of the flow hole with the wedge end facing the direction of the incoming water flow and the bottom of the wedge facing the direction of the incoming water flow. The wedge-shaped walls on the upper and lower sides are streamlined curved surfaces. The two ends of the cavity of the aerator are designed with air inlet holes 3 to allow air to enter the cavity. There are a number of ventilation holes 2 distributed at the bottom of the wedge. 3. It communica...

Embodiment 2

[0025] The gentle slope open channel of this embodiment has a pressure inlet aeration device, and its structure is basically the same as that of Embodiment 1, the difference is that the wedge-shaped aerator 1 is arranged at 1.0m away from the bottom of the overflow tunnel, below the wedge-shaped aerator. The ratio of the height of the water outflow outlet to the height of the water outflow outlet above is 1:4. The air intake holes 3 located at both ends of the cavity of the aerator communicate with the atmosphere through the tube holes located in the walls of the cavity on both sides of the flow tunnel, and the air inlet is higher than the water surface of the reservoir area.

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Abstract

The invention provides a method for aeration of a pressed inlet of a gentle slope open channel and an application device thereof. A aeration device (1) with an internal cavity communicated with the atmosphere and the cross section in a wedge shape is arranged at the tail end of the pressed inlet of the gentle slope open channel and in the pressed water body; with the wedge end facing the water flow incoming direction and the wedge bottom opposite to the water flow incoming direction, the wedge-shaped aeration device is suspended on holes bodies (4) on two sides of an overflowing hole, so that water flow flowing out of the pressed inlet is divided into an upper part and a lower part to enter the gentle slope open channel, and air in the cavity of the wedge-shaped aeration device enters a space formed by the wedge bottom, the upper water flow and the lower water flow through a vent hole (2) located at the wedge bottom of the wedge-shaped aeration device and is aerated into the water flow. The pressed inlet of the gentle slope open channel is aerated, plenty of air can be aerated once the water flow enters the open channel and be aerated to the bottom of the channel, the method has the advantage of being not subject to limitation of the gradient of a gentle slope, and the aerating corrosion-reducing effect of an overflow wall of the gentle slope open channel can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of aeration and corrosion reduction in water conservancy projects, and in particular relates to an aeration method and an aeration device at a pressure inlet of a gentle slope open channel. Background technique [0002] my country is a country rich in water power resources. In the development and utilization of water power resources, a series of problems caused by high-speed water flow are often encountered, especially cavitation damage on the overflow surface of high-speed water discharge buildings. The application of aerated corrosion reduction measures solves the above problems to a certain extent, but the aerated effect is often limited by the slope of the channel. For channels with steeper slopes, by designing aeration sills at the bottom of the channels for aeration, a relatively good effect of aeration and corrosion reduction has been achieved, and it has been widely used. When the slope is gentler t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B8/00E02B8/06
Inventor 邓军许唯临田忠张法星刘善均王韦张建民曲景学周茂林夏鹏飞
Owner SICHUAN UNIV
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