Sub-specification live fish catcher for large fish cages

Abstract

The present application discloses a sub-specification live fish catching device for large-scale fish farming cages, comprising a fish collecting box (1), and two opposite side surfaces of the fish collecting box (1) are respectively provided with fish inlets (5), a fish outlet (6), a sealable catch outlet (2) is provided on the other side surface of the fish collecting box (1); the fish collecting box (1) is connected with two sealing cover plates (13), two sealing cover plates (13) are respectively arranged in cooperation with the fish inlet (5) and the fish outlet (6); the fish collecting box (1) is provided with locking and releasing sealing cover plates ( 13) The box sealing mechanism, wherein the box sealing mechanism is connected with a driving component that drives the box sealing mechanism to release the box sealing cover plate (13). The invention can realize the effect of catching big and small and separate size fishing, avoid the disadvantage of catching big and small fish together, causing waste of seedlings, and avoid mechanical damage to the caught fish during the fishing process and individual damage caused by excessive fish density. scratches between them, so as not to affect the sale of the caught fish.

Description

technical field [0001] The invention relates to a sub-specification live fish catching device for large-scale fish-culturing cages, and belongs to the field of marine aquaculture equipment. Background technique [0002] Marine aquaculture has become an important way to expand the marine aquaculture space and promote the sustainable development of the marine aquaculture industry from nearshore to deep sea, and it has also become a world consensus. In recent years, with the completion and operation of large-scale steel structure offshore cages such as "Shenlan No. 1", "Dehai No. 1" and "Zhenyu No. 1", my country's deep-sea fish farming has begun to take shape. And in the foreseeable future, the scale of deep-sea fish farming will develop rapidly. [0003] The water body of deep-sea fish culture cages is generally tens of thousands to hundreds of thousands of cubic meters, and the aquaculture production capacity usually exceeds 1,000 tons or even thousands of tons. Such a huge...

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Problems solved by technology

[0004] The shortcoming of this method is that, first of all, the whole box of fish needs to be concentrated each time fishing, because the density is too high, it is easy to cause scratches and hypoxia of the fish, and even death, repeated batches of fishing for many times will affect the quality of the untreated fish. The fish caught is very harmful, which is not conducive to the subsequent breeding after fishing; secondly, the mortality rate of the caught fish is high, and the blood can not be bled during the processing, which affects the quality of the finished fish, and the damage rate is high, which affects the sale of the finished fish. , so as to reduce the price of finished fish; again, this method captures large fish and small fish together, and cannot realize the sub-standard fishing of large and small fish, resulting in waste of cultured fish fry; finally, this method is cumbersome to operate and manual , The cost of electricity is higher, which increases production costs and reduces production efficiency

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