Fish fry screening system and method

Abstract

The invention discloses a fish fry screening system and method. The fish fry screening system comprises fish screening ponds, wherein the fish screening ponds are used for loading fish fries needing to be screened, and a fish containing box is arranged on one side of each fish screening pond and used for containing the screened fish fries; the fish screening ponds and the fish containing boxes are matched one by one to form a fish screening mechanism, and the fish screening mechanism has multiple stages and extends from top to bottom in a step shape; the fish screening pond and the fish containing box of each stage of fish screening mechanism communicate through a connecting channel, an electric valve is arranged in the connecting channel, the input of the electric valve is connected with a controller, and the controller is used for controlling the opening degree of the electric valve so as to connect or disconnect the fish screening pond and the fish containing box; and a water inlet pipe communicating with the topmost stage of fish screening pond is arranged on the topmost stage of fish screening pond and used for injecting water into the corresponding fish screening pond, and a rotary vane device is erected at the end, opposite to the corresponding fish containing box, in each stage of fish screening pond and used for driving the fish fries to swim towards the corresponding fish containing box. The fish fry screening efficiency and the fish fry survival rate can be effectively increased, and damage to the fish fries is small.

Description

technical field [0001] The invention relates to the technical field of fish farming, in particular to a fry screening system and method. Background technique [0002] Before fry breeding, it is necessary to screen the fry to separate the fry of different sizes. On the one hand, it is to screen out high-quality and fresh fry for breeding to improve the quality and output of the culture; on the other hand, it is to screen out fry of different sizes. , to feed different types and quantities of baits separately, so as to avoid the situation where big fish plunder small fish and compete with each other, so as to achieve stable growth of fry and increase the production of aquaculture. [0003] The traditional screening method is that workers manually screen according to experience. This method is time-consuming and laborious, and it is easy to damage the fry, and it is difficult to control the size of the fry. The screening process of the existing fry screening device is cumberso...

AI Technical Summary

Problems solved by technology

[0003] The traditional screening method is manual screening by workers based on experience. This method is time-consuming and laborious, and it is easy to damage the fry, and it is difficult to control the size of the fry.

The screening process of the existing fry screening device is cumbersome, and when the fry are screened, the scales of the fry are easy to be scraped off, and the scraped area is too large, which is easy to reduce the survival rate of the fry. After the screening is completed, the fry need to be picked up by workers, and the fry swim During the process, they will squeeze each other, so that the fish scales will be scraped off, reducing the survival rate of fry

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