Inflatable water-replaceable net cage device for shellfish larvae and use method thereof

Abstract

The invention provides an inflatable water-replaceable net cage device used in a shellfish larva cultivation process and a use method thereof. The device comprises a net cage framework, a filter screen, a water replacing hose and inflating devices. The cylindrical net cage framework is made of stainless steel and divided into an inner frame and an outer frame, the diameter of the outer frame is large, and the outer frame is mainly used for supporting the whole device; the diameter of the inner frame is small, the bottom of the inner frame is 5-8 cm higher than the bottom of the outer frame, hard drainage pipe fixing rings are welded to the central portions of the upper and lower parts of the inner frame respectively, the lower fixing ring is 15-20 cm away from the bottom of the inner frame, a hard drainage pipe is positioned in the fixing rings, one end of the water replacing hose is put into the hard drainage pipe, and water replacement operation is carried out by utilizing the siphonprinciple. The filter screen sleeves the inner frame, and the upper end of the filter screen is fixed to the upper end of the net cage framework through a rope body on the outer wall of the filter screen. The inflating devices are nano inflation pipes which are fixed to the inner frame and the outer frame respectively, and the lengths of the nano inflation pipes are the same as the circumferencesof the inner frame and the outer frame respectively; an air inlet pipe is connected with the nano inflation pipes through a tee joint and fixed to the net cage framework, and an air inlet valve is arranged at an air inlet of the air inlet pipe. By utilizing the use method of the inflatable water-replaceable net cage device, the labor cost can be reduced by 80% or above, and the adhesion rate of larvae adhering to the filter screen during water replacement is lowered by 70-90%.

Description

technical field [0001] The invention relates to the field of aquaculture, in particular to an inflatable water-changing cage device used in the cultivation of shellfish larvae and a method for using the same. Background technique [0002] my country has a huge marine shellfish farming industry. Shellfish farming is an important part of the marine aquaculture industry, and its output accounts for 80% of my country's total marine aquaculture output. Common shellfish such as clams, oysters, scallops, and gastropod snails are delicious, nutritious, and have important economic value. With the continuous development of artificial breeding technology, more and more attention has been paid to the high-efficiency factory breeding method. [0003] During the nursery process of shellfish, the daily water change of its early planktonic larval stage is an important task. At present, the breeding of bulk shellfish seedlings in my country basically follows the traditional method 20-30 ye...

AI Technical Summary

Problems solved by technology

[0005] For the problems existing in the prior art, the object of the present invention is to provide an inflatable water-changing net cage device used in the cultivation process of shellfish larvae, which saves labor and improves the survival rate of larvae, so as to realize the automatic replacement of water in the larvae cultivation process. Water, to solve the problems of high larval mortality and high labor costs in existing shellfish water exchange cages

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