Trigger type flow discharge device capable of increasing survival rate of fry

Abstract

The invention discloses a trigger type flow discharge device capable of increasing the survival rate of fry. The provided trigger type flow discharge device aims to avoid the problems that shellfish fry are likely to be taken away by ocean current in the process of being put to the seabed and then distributed to the areas not suitable for attached growth of the shellfish fry and correspondingly the survival rate of the shellfish fry is reduced. The device comprises a bottom roller, shaft rods correspondingly arranged at the two ends of the bottom roller one to one, shaft sleeves rotatably arranged on the shaft rods, a separating cylinder which is arranged in the bottom roller and divides an inner cavity of the bottom roller into an inner cavity body and an outer cavity body, a plurality ofreleasing ports formed in the separating cylinder, a plurality of flow discharge openings formed in the outer side face of the bottom roller and walking trigger flow discharge mechanisms corresponding to the flow discharge openings one to one. Each walking trigger flow discharge mechanism comprises a guide sleeve, a guide rod slidably disposed in the guide sleeve, an outer cover plate which is disposed on the guide rod and used for sealing the corresponding flow discharge opening, an inner cover plate which is disposed on the guide rod and used for sealing the corresponding releasing port, and a support rod disposed on the outer cover plate.

Description

technical field [0001] The invention relates to the field of releasing shellfish seedlings, in particular to a trigger-type releasing device that can improve the survival rate of seedlings. Background technique [0002] Artificial shellfish ecological restoration means that shellfish are released into natural marine waters where shellfish resources have declined after artificial breeding and breeding, so that the natural population of shellfish can be restored. At present, the general method of artificial shellfish ecological restoration is to pack the seedlings, transport them to the release sea area by a transport ship, and then manually sow the seedlings in a certain sea area. Because shellfish seedlings are easily taken away by ocean currents during the process of being placed on the seabed, they are randomly distributed everywhere on the seabed, and many seabeds are not suitable for the attachment and growth of shellfish seedlings (such as muddy bottom sea areas). Most...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method that can prevent shellfish seedlings from being easily taken away by ocean currents in the process of being placed on the seabed, and distributed to seabed areas that are not suitable for shellfish seedlings to attach and grow, thereby reducing the cost of shellfish seedlings. A trigger release device that can improve the survival rate of seedlings due to the problem of survival rate

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