A tank system for fish egg movement test

Abstract

The invention discloses a roe movement test water tank system. The roe movement test water tank system comprises a water storage pool, a rectangular water tank body and a rotary vane type end door, and further comprises an upstream water stop gate, a downstream water stop gate, a roe throwing rail car, a roe throwing lifting lever, an L-shaped roe throwing funnel, an L-shaped roe recovery funnel and a roe transmission device, wherein the roe transmission device can transmit roes recovered by the L-shaped roe recovery funnel into the L-shaped roe throwing funnel; and water recovered by the L-shaped roe recovery funnel directly falls into the water storage pool. The roe movement test water tank system has the following advantages: (1) an automatic cycle of roe throwing, recovery and transmission is realized; (2) the roe throwing rate and the continuous throwing time can be adjusted and controlled; and (3) the damage ratio of the roes is effectively reduced.

Description

technical field [0001] The invention relates to a water tank system, in particular to a fish egg movement test tank system suitable for research on the hydraulic characteristics of fish egg movement, research on the impact of reservoir scheduling on fish, and research on fish early resource estimation, etc., which belongs to the ecological hydraulic test technology field. Background technique [0002] The floating movement of fish eggs is an important stage in the early development of fish, which is related to the successful hatching of fish eggs and resource replenishment. In natural rivers, how fish eggs move, how fish egg density is distributed, how river topography and hydrodynamic conditions affect fish egg movement, all will affect the transfer and final destination of fish eggs. Therefore, knowing and understanding the hydrodynamic characteristics and movement rules of fish eggs in natural rivers is very important for the protection of fish resources, restoration of ...

AI Technical Summary

Problems solved by technology

[0005] 1. It is usually necessary to use a general funnel or a straw to manually release fish eggs at a certain position upstream, which cannot realize automatic feeding, recovery and transmission of fish eggs, which brings inconvenience to the actual operation;

[0006] 2. It is difficult to control parameters such as the flow of fish eggs (the number of fish eggs released per second), the location of the eggs, and the continuous delivery time;

[0007] 3. The specific gravity of fish eggs is close to that of water, and slightly heavier than water. It is easy to sink to the bottom quickly when the flow velocity is small, and it is easy to drift with the current when the flow velocity is large. The height of the traditional hydraulic test tank is small (generally less than 50cm). Under the condition of slow flow rate, fish eggs sink to the bottom before they move stably after being released upstream. If a large tank with a height greater than 80cm is used, the width of the tank will be relatively large (the width of a large tank is generally greater than 80cm), which is not conducive to the movement of fish eggs Video collection and observation of the experiment (fish egg movement video is usually shot on the side of the tank, if the width of the tank is too large, the fish egg movement image at the far end of the lens will be severely distorted and distorted)

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