Larva fish hatch device

Abstract

The invention relates to aquaculture equipment, in particular to a larva fish hatch device comprising a filter tank, a hatching tank and a drainage tank. The filter tank and the hatching tank are communicated with water sources, the drain tank lower than the hatching tank and is enclosed all around with an opening at the top is arranged in the hatching tank, and a drain port communicated with a drain pipe is formed in the drain tank. A hatching ring path is formed between the drain tank and the hatching tank, and the bottom of the hatching ring path is connected with the filter tank through a water inlet pipe. An egg resistance screen is fixed at the upper end face of the drain tank, and an upper angle of elevation is formed between the egg resistance screen and the upper end face of the drain tank. According to the arrangement, when water level in the hatching ring path reaches the upper end of the drain tank, the egg resistance screen at the upper end of the drain tank can prevent fish eggs discharging from the drain tank, so that flowing water in the hatching ring path can protect the fish eggs and improve hatching rate of larva fish. In addition, the drain tank is arranged under the water surface of the filter tank, so that water can be automatically ushered into the hatching ring path to keep the water flowing by the aid of water level difference, and accordingly, cost is saved.

Description

[0001] technical field [0002] The invention relates to aquaculture equipment, in particular to a device for hatching fry. Background technique [0003] Fry hatching is an important part of fry production, and one of the most important parameters of fry hatching is hatching rate. In order to improve the hatching rate of fry, it is necessary to adopt clean running water to hatch fish eggs. In the prior art, water is generally continuously fed into the hatching tank, and then the water is discharged from around the hatching tank to form flowing running water. But in this way, on the one hand, the fish roe will be lost from the drain along with the water flow, and the fish roe will block the filter screen in addition, so that the water in the hatching tank cannot be discharged. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a fry hatching device that continuously provides running water ...

AI Technical Summary

Problems solved by technology

But in this way, on the one hand, the fish eggs will be lost from the drain with the water flow, and on the other hand, the fish eggs will block the filter screen, so that the water in the hatching tank cannot be discharged.

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