Bait casting machine for net cage aquaculture

Abstract

The invention relates to a bait casting machine for net cage aquaculture. The bait casting machine for net cage aquaculture comprises a feed box, a buoyancy mechanism, a bait casting disc, a bait casting motor, a time relay and a frequency conversion controller; a conical flow guide platform bulging outward is arranged in the center of the bottom face of the feed box, and a flow guide plate which is correspondingly inclined is arranged at the periphery of the bottom face of the feed box; multiple arc-shaped discharge holes are evenly formed in an annular area between the flow guide plate and the flow guide platform; the bait casting disc is fixedly arranged below the discharge holes, and bait evenly falls onto the bait casting disc in multiple directions through the discharge holes; the bait casting disc is driven by the bait casting motor to rotate, and the bait falling on the bait casting disc is cast into a surrounding water body; the frequency conversion controller of the bait casting motor controls the rotating speed, thereby the casting distance is controlled, and the time relay controls starting and the duration time of the bait casting motor; the distance between each discharge hole and the upper end of a corresponding blade of the bait casting disc is 5-40 mm, when the bait casting disc does not rotate, the bait is warded off by the bait casting disc, no bait is dropped out of the feed box, and when the bait casting disc rotates, the bait is dropped out of the feed box continuously.

Description

technical field [0001] The invention relates to a net cage aquaculture bait feeding machine, which belongs to the technical field of aquaculture devices. Background technique [0002] The wild fishery resources in my country's coastal waters have declined seriously, and with the entry into force of the China-Japan and China-Korea fishery agreements, seawater fish cage culture has become a priority development industry for fishermen to switch industries and adjust fishery structure. Cage culture has the characteristics of intensification, high density and high benefit, and is the main force of my country's fishery emerging industry. According to incomplete statistics, there are more than 700,000 seawater fish culture net cages in the country, and there are more than 30 kinds of fish cultured on a large scale. The bait for cage culture of marine fish in my country is mainly chilled miscellaneous fish. In 2006, the national marine fish aquaculture output was 770,000 tons, and ...

AI Technical Summary

Problems solved by technology

These baits, mainly fresh miscellaneous fish and shrimp, are likely to cause the following problems: first, further aggravate the damage to offshore fishery resources; second, pollute the sea environment and water quality; third, due to changes in weather, seasons, and sea conditions, daily There is sufficient supply of feed fish, which affects the breeding production; fourth, due to water quality, bottom quality pollution and the inability to guarantee the supply of feed fish, diseases will be induced; fifth, nutrition is unbalanced, resulting in high cost, poor quality and low benefit

[0003] At present, the granular bait for mariculture is basically carried and fed manually, which is labor-intensive and low-efficiency. Especially in the fry breeding stage, it needs to be fed in small quantities and in multiple batches to prevent the bait from being washed away by the ocean current.

[0004] In addition, studies have shown that slow-sinking bait has a significant advantage in bait coefficient ratio compared with floating bait, but when the existing cage feeding machine is feeding, the bait often sinks to the bottom of the sea before it is eaten. Pollution of seawater and waste

[0005] Applying the fish pond bait feeder directly to the cage cannot solve this problem. The main reason is that the size of the cage is small, and the bait throwing surface should not be too large; bait, and the bait is distributed unevenly, resulting in unbalanced nutrition of farmed fish and different body sizes

Especially fish species such as large yellow croaker, when fed to a certain size, high-density fish schools will form in the cage. If the feeding is uneven, it will cause fish schools to rush for food, resulting in the death of fish schools due to hypoxia

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