Fishway outlet system

Abstract

The invention discloses a fishway outlet system. The fishway outlet system adapts to water level change and comprises a base table, a base, a power shaft, a fishway outlet section and a rotating cylinder. The base is fixed to the water bottom, the upper end of the power shaft is fixed to the base table, and the lower end of the power shaft is rotatably fixed to the base. The fishway outlet sectionextends from bottom to top in a cylindrical spiral line mode, and multiple stages of fishway outlets are formed in the fishway side wall of the fishway outlet section. The top of the rotating cylinder is fixedly connected to the base table so as to be driven by the power shaft to rotate, the cylinder wall of the rotating cylinder is provided with multiple stages of outer wall openings, and the multiple stages of outer wall openings in the rotating cylinder correspond to the multiple stages of fishway outlets of the fishway outlet section, so that the multiple stages of fishway outlets can besequentially opened when the power shaft rotates the rotating cylinder. According to the fishway outlet system, opening and closing of a plurality of gates do not need to be switched, and only the rotating action of the rotating cylinder needs to be conducted.

Description

technical field [0001] The invention relates to the fields of water conservancy and hydropower engineering and ecological environment, in particular to a fish passage building, and more particularly to a fishway outlet system adaptable to water level changes. Background technique [0002] Fishway is an engineering measure to help fish go up. Building dams and other water conservancy projects on rivers cuts off the way for fish to migrate and spawn. By building fishways, fish can go up during the migration season, thereby Maintain the ecological balance of the river section. [0003] Fishway is a special facility to help fish pass through barriers such as dams smoothly, and plays an irreplaceable role in maintaining the continuity of rivers and the communication of biological populations. The success of fishway structures is one of the evaluation indicators for the health of the river ecosystem, and it is also an important evaluation indicator for ecological environment prot...

AI Technical Summary

Problems solved by technology

[0005] For vertical-slotted fishways with multiple elevations, large and rapid changes in the upstream water level of hydraulic structures (especially daily regulation reservoirs) will cause frequent switching of outlet gates, thus reducing the water flow in the fishway. The stability of the state is not conducive to the upward tracing of fish

In addition, the process of multi-gate switching is slow and takes a long time, and the switching is often not completed, and the water level may have changed again

In addition, the multi-exit vertical slot fishway needs to arrange multiple gates and their corresponding automatic control systems, and the location of multiple gates needs to be selected, and the system of each gate needs to be maintained later, which increases the initial construction investment cost And later equipment operation and maintenance costs increase the difficulty of fishway construction and operation management

[0006] Based on the current research results, in order to adapt to the large fluctuations in the upstream water level of hydraulic structures, the vertical slot fishway needs to be equipped with multiple outlets, which makes it difficult to select a site. The switching between different outlets makes the operation of the fishway too complicated, and causes The instability of the water flow state during the operation period of the fishway affects the fish passing efficiency

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