Automatic sewage device for aquaculture pond

By combining a flap-type check valve and a float structure, the corrosion problem of existing automatic sewage discharge systems in seawater environments is solved, achieving flexibility in both automatic and manual sewage discharge, avoiding the risk of emptying aquaculture ponds, and reducing maintenance difficulty.

CN224330170UActive Publication Date: 2026-06-09NINGBO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NINGBO UNIV
Filing Date
2025-04-10
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing automatic sewage discharge systems are prone to corrosion in marine aquaculture environments, are difficult to operate manually when the facilities malfunction, and pose a risk of emptying aquaculture ponds, making it difficult to achieve standardized management.

Method used

It adopts a flap-type check valve and float structure. The buoyancy of the float controls the opening and closing of the check valve. Combined with solenoid valve and manual operation, it realizes automatic and manual sewage discharge. The float position adjustment prevents the aquaculture pond from emptying.

Benefits of technology

It achieves corrosion resistance in seawater environment, simple structure, high degree of automation, and manual backup function, avoiding the risk of emptying aquaculture ponds and reducing maintenance difficulty.

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    Figure CN224330170U_ABST
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Abstract

This utility model discloses an automatic sewage discharge device for aquaculture ponds, including a sewage discharge riser. The riser is connected to the outlet of a sewage pipe via a tee. A flapper-type check valve is installed at the outlet of the tee, with a flapper inside the valve body. A float is installed inside the riser, with a sealed top and several small holes at its bottom. The top of the float is fixedly connected to the top of the riser via a first rope, and the bottom of the float is fixedly connected to the free end of the flapper via a second rope. An air pipe for inflating and venting the float is connected to the top of the float, and the other end of the air pipe is connected to a solenoid valve for controlling its opening and closing. Under the upward buoyancy of the float, the second rope opens the flapper, connecting the sewage pipe to an external drainage ditch. The advantages are that it combines automatic and manual functions, avoids the risk of the aquaculture pond being emptied, and has a simple overall structure, facilitating daily maintenance and repair.
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