Swirling flow shaft with a plurality of swirling chambers

Abstract

The invention discloses a swirling flow shaft with a plurality of swirling chambers. The swirling flow shaft is characterized in that at least one expanded swirling chamber is coaxially formed on the elevation of a shaft section of the swirling flow shaft, and each swirling chamber is connected with a corresponding drain tunnel; the diameter of a lower shaft with the swirling chambers is more than or equal to that of an upper shaft; and an inlet, which is connected with a corresponding swirling chamber, of a drain tunnel at a lower position is completely positioned in a sidewall cavity formed between a letdown water flow and the wall surface of the swirling chamber. The swirling flow shaft is ingenious in design; each swirling chamber can be connected with a drain tunnel running at a low level, and shares the same shaft, the same slope section, the same lower horizontal section and an outlet connected with a water flow in a downstream river channel, so that the construction cost of hydraulic engineering can be greatly lowered, the cycle of construction engineering can be shortened, and difficulty in the pivot distribution of the hydraulic engineering can be eliminated; and moreover, the swirling flow shaft is conveniently and flexibly used, and is high in applicability and particularly applied to hydraulic engineering with big changes in the water level of a reservoir area.

Description

Technical field [0001] The invention belongs to the technical field of swirl shafts in water conservancy engineering discharge structures, and in particular relates to a swirl shaft with a plurality of swirl chambers. Background technique [0002] With the continuous progress of modern water conservancy science and technology in our country, the swirling shaft spillway tunnel as a relatively new type of energy dissipater has been widely used in medium and high head hydropower stations. This kind of swirling shaft flood discharge tunnel is generally composed of an inlet section, an upper leveling section, a variable slope section, a whirlpool chamber, a tapered section, a shaft, a slope pressing section, and a lower leveling section. The structure is as follows figure 1 Shown. But on the one hand, when the water level in the reservoir area is lower than the elevation of the inlet bottom of the upper flat section, the water cannot be discharged from the cyclone-type shaft spillway ...

AI Technical Summary

Problems solved by technology

Obviously, this technical solution will not only bring relatively expensive engineering costs and a long construction period, but also because a discharge tunnel must have an outlet connected to the downstream river flow, which in alpine and canyon areas, will Greatly increase the difficulty of water conservancy project layout

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