Device and method for guiding fishes to sail upstream

A technology of fish and nozzles, which is applied in the field of environmental protection of water conservancy and hydropower projects, can solve the problems that fish cannot be traced upwards, and achieve the effects of wide range of applicable fish, good fish attracting effect, and improved fish passing efficiency

Active Publication Date: 2014-03-26
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide a device for guiding fish upwards in view of the problem that fish in low-velocity areas or still water areas in the reservoir cannot be traced upwards

Method used

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  • Device and method for guiding fishes to sail upstream
  • Device and method for guiding fishes to sail upstream
  • Device and method for guiding fishes to sail upstream

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A device for guiding fish upwards in the present invention comprises a hydrodynamic device 1 and several inverted T-shaped water supply units 2, the inverted T-shaped water supply unit 2 is composed of a main water supply pipe 3 and a branch pipe 4; The hydrodynamic device 1 is connected with several inverted T-shaped water supply units 2, the branch pipe 4 is provided with several spouts 5, and the spouts 5 are provided with nozzles 6, and the inverted T-shaped water supply unit 2 contains two or more Nozzle 6, the rays drawn from the injection direction of nozzle 6 in each unit roughly intersect at one point, the line connecting this point with any two nozzles 6 and the line between these two nozzles 6 form an acute triangle. The submerged jets of the nozzles 6 are superimposed to form a superimposed jet, and the superimposed jets of several unit nozzles 6 are connected end to end and superimposed to form the jet water flow channel 7, as image 3 shown.

[0026] In t...

Embodiment 2

[0034] According to the method that the same device guides the fish to go up in embodiment 1, in the month when the fish goes up, the hydrodynamic device 1 in the device is opened to supply water to the pipe network, and the water flows out from the duckbill valve through the main pipe and the branch pipe. Form a continuous jet flow channel 7 in still water or low-velocity water body to form as attached figure 2 For the stable and continuous flowing water flow along the central axis of the pipe network shown in , the flow rate sensor 9 measures the flow rate and transmits the signal back to the computer controller 8, and the control computer adjusts the water supply flow rate of the hydrodynamic device 1 in good time according to the expert database plan until the flow rate sensor 9 When a reasonable flow rate value is detected, the system enters a relatively stable operating state. The multi-nozzle duckbill valve jet forms a high-speed main flow along the center of the pipe ...

Embodiment 3

[0037] For reservoirs with large water level fluctuations, multiple long-distance fishway devices can be installed within the range of water level fluctuations, such as Figure 7 As shown, when the water level is low, channel A can be opened; when the water level is medium, the two channels A and B are optional; when the water level is high, the three channels A, B, and C are optional; at each water level, the working method and implementation of each channel Example 2 is the same, and the device setting is the same as in Example 1. as attached Figure 7 In the section of the shown river reservoir, wherein the guiding fish upward tracing device 15 is fixed by a bracket 17, which is a common arrangement for fixing the guiding fish upward tracing device of the present invention.

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PUM

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Abstract

The invention discloses a device and method for guiding fishes to sail upstream. The device comprises a water power device and a plurality of inverted T-shaped water supply units. The inverted T-shaped water supply units are composed of main water supply pipes and branch pipes. A water pump is connected with the inverted T-shaped water supply units, each branch pipe is provided with a plurality of spouts, and each spout is provided with a nozzle. Each inverted T-shaped water supply units contains more than two nozzles, radiation rays led out through the nozzles in each unit are approximately intersected at one point, connecting lines of the point with any two nozzles form acute triangles with connection lines between the two nozzles, submerged jet streams of the nozzles of any unit are superimposed to form a superimposed jet stream, and the superimposed jet streams of the unit nozzles are superimposed end to end for form a jet stream flow channel. The problems that the fishes in favor of sailing upstream in flowing water have no attracting stream flow to guide to sail upstream in static or low velocity areas in a high dam reservoir are solved; multiple sprout jet streams of a pipe network are adopted to guide the fishes to sail upstream, so that the fishes having spawning behavior by sailing upstream are prevented from failing to pass the wide ranges of static or low velocity areas due to changes in hydrological conditions in a water conservancy project.

Description

technical field [0001] The invention relates to a device and method for guiding fish upwards, belonging to the field of water conservancy and hydropower engineering environmental protection. Background technique [0002] With the improvement of public awareness of environmental protection, fishways, as an ecological compensation measure to mitigate the impact of water conservancy projects on fish, have attracted more and more attention from all walks of life and environmental protection administrative departments. Most of the traditional fishways currently built focus on how to efficiently attract fish at the entrance of the fishway, whether the fish can pass through the fishway and climb over the dam smoothly after entering the fishway, and whether the fish can adapt to the changing water level of the upstream reservoir after swimming out of the fishway , only focusing on the problem of fish obstacle crossing at the dam site. In 1948 and 1954, foreign scholars conducted ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B1/00E02B8/08
Inventor 戴会超高柱谭均军尹章昭唐梦君高勇
Owner HOHAI UNIV
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