A method for improving the flow capacity of large-scale water diversion projects without affecting the normal water supply
A technology with flow capacity and normal water supply, applied in water conservancy projects, water supply devices, artificial waterways, etc., can solve problems such as channel original water flow interference, limited effect of large-scale channel flow capacity increase, need to stop water for maintenance, etc., to achieve hydraulic slope The effect of increasing the drop, increasing the over-current capacity, and avoiding safety risks
Active Publication Date: 2021-12-17
CHANGJIANG SURVEY PLANNING DESIGN & RES
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Problems solved by technology
Reconstruction and expansion measures for channel engineering, such as increasing the water delivery section, require water suspension for maintenance, which is not applicable to water diversion projects with a high water supply guarantee rate
In addition, some devices that increase the flow rate of the channel water body to increase the flow capacity, such as the Chinese patent CN104404921A, interfere with the original water flow of the channel because the device is arranged at the bottom of the channel, and have limited effect on increasing the flow capacity of large channels
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[0056] The present invention will now be described in detail by taking the application of the present invention to improve the flow capacity of a large-scale water diversion project as an example, and it also has a guiding effect on the application of the present invention to improve the flow capacity of other large-scale water diversion projects.
[0057] Take a large (I) type water diversion project in China as an example. The design maximum flow of water delivery project is 420m 3 / s, mainly open channel water delivery, the total length of the main channel is about 1196km. 60 control gates are arranged along the line, and the main canal is divided into 60 canal sections. After many years of operation of the project, phenomena such as siltation and shell vegetable adhesion inevitably exist, and there are also phenomena such as damaged lining boards in the canal project, which may have a certain impact on the flow capacity of the water transfer project, increasing the water ...
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The invention discloses a method for improving the flow capacity of a large-scale water diversion project without affecting normal water supply. It adds a portal type tubular pump at the outlet maintenance gate of the water delivery building to achieve a more significant improvement of the flow capacity without affecting the normal water supply and flow; the method for improving the flow capacity includes the following steps, the steps 1: Deduce the hydraulic gradient in the canal section according to the need to improve the flow capacity of the water delivery channel; Step 2: According to the hydraulic gradient in the canal section, use L and i to estimate the minimum lift of the gantry tubular pump; Step 3 : Draw up the head value of the gantry tubular pump, calculate the flow capacity of the water delivery channel under different head conditions, and draw the corresponding relationship between the flow capacity and the head curve; Step 4: Install the gantry tubular pump in the common door slot of the maintenance gate. The invention has the advantage of significantly improving the flow capacity without affecting the normal water supply.
Description
technical field [0001] The invention relates to the field of construction and operation of large-scale water transfer projects, and more specifically relates to a method for improving the flow capacity of large-scale water diversion projects without affecting normal water supply. Background technique [0002] Since the 21st century, my country has built a number of large-scale water diversion projects to provide urban water supply, agricultural irrigation, and ecological water replenishment to water-shortage areas. With the increase of operation years, the channel flow capacity of large-scale water diversion projects may not reach the design scale, or it may be difficult to meet the increasing water demand of users. The flow capacity of the channel is far lower than the original design level, or when the channel is designed for transmission or the flow is increased, the actual operating water level of the channel exceeds the original design value, and the superelevation of t...
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IPC IPC(8): E02B5/00E02B5/08E03B5/00
CPCE02B5/00E02B5/08E03B5/00
Inventor 吴德绪黄会勇吴永妍刘少华张娜李波万蕙
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES