Multi-stage sorting device and method for live and residual bait snails in breeding of whitmania pigra

By using a multi-stage sorting device and method, and taking advantage of the difference in self-weight and buoyancy between live and dead snails, combined with water circulation and differential speed sorting, the problem of separating live bait snails and dead snails in the cultivation of broad-bodied golden leeches has been solved, improving sorting accuracy and efficiency, and improving the cultivation environment and benefits.

CN122076594APending Publication Date: 2026-05-26TIANJIN ANIMAL DISEASE PREVENTION & CONTROL CENT
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Patent Information

Application Number
CN202610338582.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-19
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In existing technologies, it is difficult to separate live bait snails and dead bodies in a timely and efficient manner during the cultivation of broad-bodied golden leeches. This leads to the dead bodies being prone to decay and deterioration, polluting the aquatic environment and affecting the efficiency of cultivation.

Method used

Employing a pump-suction conduction structure, a floating and sinking separation structure, a floating snail aggregation structure, a differential speed separation structure, and a pre-dispersal component, the system performs multi-stage separation by utilizing the difference in self-weight and buoyancy between live snails and their remains. Combined with water collection circulation and differential speed separation, it achieves efficient separation.

Benefits of technology

It significantly improved the accuracy and efficiency of sorting live and dead snails, reduced the decay and deterioration of dead snails, improved the breeding environment, reduced the risk of disease, and increased breeding efficiency.

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Abstract

The invention discloses a multi-stage sorting device and method for live and residual bait snails in whitmania pigra breeding, and the device comprises a pumping transmission structure which intensively obtains to-be-sorted snails; the floating and sinking sorting structure is communicated with the pump suction conduction structure, receives the to-be-sorted snail living bodies and the to-be-sorted snail residual bodies and performs floating and sinking sorting based on the difference between the self weight and the buoyancy force of the to-be-sorted snail living bodies and the to-be-sorted snail residual bodies; the floating snail gathering structure is communicated with the floating and sinking sorting structure, and the floating snail gathering structure receives and quantitatively gathers the snail living bodies and the snail residual bodies in the floating position state; the vibration screening assembly communicates with the floating screw gathering structure and can output screw bodies of specific specifications; and the differential speed sorting structure communicates with the vibration screening assembly and can conduct differential speed sorting based on the pipeline water flow speed and the spiral body specification. In the breeding process of whitmania pigra, bait snail living bodies and residual bodies are efficiently separated in time, it is avoided that the residual bodies are accumulated for a long time and spoilage occurs, and the technical problem that in the prior art, the breeding environment is polluted is solved.
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