A kind of hydraulic impact rotary drum fishway

Abstract

The invention discloses a fishway with a hydraulic impact rotating cylinder, and specifically relates to the technical field of river barrage structures for passing fish. , the middle position of the sluice base groove is provided with a row of water flow regulating mechanisms and partition assemblies arranged at intervals along the water flow direction, which divides the fishway into two parts: the slow flow area and the rapid flow area. Partition plate; water flow regulating mechanism includes vertical shaft, rotating cylinder and blades. The invention improves the water flow structure through the rotating cylinder, effectively adjusts the local flow field, and is suitable for the migration of the target fish. The slowing down of the flow velocity is conducive to the recovery of the fish's physical strength during the upward tracing process, and improves the effect of passing the fish. The overall structure is simple and does not require too much Maintenance, economical and suitable for various hydraulic projects, suitable for high water head dams.

Description

technical field [0001] The invention relates to the technical field of fish passing through barrage structures, 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-passing structures that hel...

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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