Hydraulic impact rotating cylinder fishway

Abstract

The invention discloses a hydraulic impact rotating cylinder fishway, and particularly relates to the technical field of river blocking building fish passing. The hydraulic impact rotating cylinder fishway comprises a gate foundation groove fixed to a riverbed at the bottom of an inlet of the fishway, a flow guide assembly is arranged at the inlet side of the gate foundation groove, a row of waterflow adjusting mechanisms and partition plate assemblies are arranged in the middle of the gate base groove in the water flowing direction in an alternative manner and divide the fishway into a leftpart and a right part, namely a slow flow area and a rapid flow area, an adjusting partition plate is arranged at an inlet of the rapid flow area, and the water flow adjusting mechanisms comprise vertical shafts, rotating cylinders and blades. According to the hydraulic impact rotating cylinder fishway, the water flow structure is improved through the rotating cylinders, the local flow field is effectively adjusted, the hydraulic impact rotating cylinder fishway is suitable for running of target fishes, the flowing speed is reduced, so that the physical strength recovery of the fishes in the upstream process is facilitated, and the fish passing effect is improved; and the overall structure is simple, too much maintenance is not needed, and the hydraulic impact rotating cylinder fishway iseconomically suitable for various hydraulic engineering and suitable for high-water-head dams.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of fish passing through barrage structures, and in particular to a fishway with a hydraulic impact rotating cylinder. Background technique [0002] With the continuous construction of a large number of water conservancy facilities, the living environment of fish has been seriously threatened. The barrage structures cut off the upstream and downstream water flow, making it impossible for fish in the original river to migrate, resulting in the reduction or even extinction of a large number of fish. [0003] The protection of aquatic organisms is an important issue to be considered in water conservancy and hydropower engineering construction projects. In order to protect natural fishery resources and ensure the continuity and diversity of aquatic ecosystems, the main restoration measures currently taken are to build fishways in hydropower and water conservancy projects. Fishways are fish-p...

AI Technical Summary

Problems solved by technology

The tank wall and bottom of the Daniel-style fishway tank are equipped with baffles and sills. The flow rate is relatively large, which can improve the conditions for attracting fish downstream. However, the water flow is turbulent and the adaptability to water level changes is poor. It is only suitable for strong swimming ability. The overflow weir fishway allows fish to pass through the top of the weir, and the flow is relatively stable, but the energy dissipation is insufficient, and the adaptability to water level changes is poor. It is only suitable for fish that like to migrate on the surface and have jumping habits; submerged The orifice-type fishway is submerged underwater through the fishhole, and it can adapt to the change of water level better, but the energy dissipation is not sufficient. It mainly relies on the diffusion of water flow to dissipate energy. Large and medium-sized fish migrating from the bottom; most of the tanks of the vertical slit fishway are intercepted, leaving only one vertical slit for passing fish, the energy dissipation effect is relatively sufficient, and it can adapt to large water level fluctuations and complex flow regimes Large and medium-sized fish, but it is easy to cause bending and turbulence of the water flow in the pool; the combined fishway is a combination of overflow weir, submerged hole and vertical joint, which can better play the hydraulic characteristics of various types of orifices and adapt to Different habits of fish, but the structure is complex and difficult to design; the special structure of the fishway is fixed on the concrete wall with bamboo baskets filled with shavings. The structure is simple and economical, but the baskets and bamboo baskets are perishable and need to be updated frequently. It is only suitable for fish that can crawl, adhere, and are good at passing through grass; the energy consumption of water flow imitating natural fishways is realized through shoals, coarse stones or small waterfalls, and the resting conditions of fish in the pool are good, which can satisfy a variety of fish Requirements, only applicable to small water head, require suitable terrain

[0005] Existing fishways have shortcomings such as not being able to meet different fish migrations, low fish passing efficiency, and unsuitable for high-head barrage structures. Therefore, it is very meaningful to invent a hydraulic drum fishway with high fish passing efficiency

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