Fry quick screening device

Abstract

The invention discloses a fry quick screening device, including a fixing seat and a water tank, wherein bearing blocks are fixedly installed on the inner sides of the fixing seat, rolling bearings arearranged in the two bearing blocks, rotating shafts are arranged in the inner circles of the two rolling bearings, a first screening box, a second screening box and a third screening box are arrangedin the water tank, respectively, a first screening net, a second screening net and a third screening net are correspondingly arranged in the first screening box, the second screening box and the third screening box, sectional shapes are all funnel-shaped, and the diameter of the screening holes increases linearly and successively, so that fries of different specifications can be screened in one time, the screening efficiency is increased, and the fry survival rate is increased, by using the fry physiological characteristics of preferring to float up when vibration happens, the situation of net hole blocking caused by over-stacked fries can be prevented, and further the certain degree of fry screening is improved.

Description

technical field [0001] The invention relates to the technical field of fry screening, in particular to a rapid screening device for fry. Background technique [0002] As we all know, fish fry need to be screened before frying in the pool. On the one hand, the survival rate of the fry is guaranteed. On the other hand, the screened fry can be put in and managed separately according to their size, so as to ensure that the fry will not be preyed upon by the weak because of their different sizes. situation, increase the mortality rate, and thus increase the cost input. When the traditional fry screening device screens fry, it is necessary to repeatedly replace the screens with different mesh diameters, and repeatedly screen the fry, which is easy to increase the mortality of the fry, and in the screening process, the accumulation of fry is easy to cause the mesh of the screen to be broken. The blockage of the hole reduces the screening efficiency of fry. [0003] In the existin...

AI Technical Summary

Problems solved by technology

When the traditional fry screening device screens fry, it is necessary to repeatedly replace the screens with different mesh diameters, and repeatedly screen the fry, which is easy to increase the mortality of the fry, and in the screening process, the accumulation of fry is easy to cause the mesh of the screen to be broken. Clogging of holes reduces the screening efficiency of fry

[0003] In the existing technical scheme, such as the fry screening device announced by the application number 201020568748.9, it is easy to cause the blockage of the mesh of the screening net, and it is inconvenient to take out the screened fry after screening, so a fast screening of fry is proposed device

Combining the existing technical means and existing problems, the main problems in the screening of existing fry are: firstly, the screening efficiency is low, it is difficult to screen out the fry of the corresponding specification at one time according to specific needs, and multiple screenings are required. And will cause the death of fry in large quantities in the process of repeated screening, cause heavier economic loss; Secondly, lack the protection to fry in the process of screening, be difficult to protect fry according to the physiological characteristic of fry, improve screening process. The survival rate of medium fry; the last is that during the screening process of fry, it is easy for fry to block the screening hole, making it difficult to carry out the screening work effectively, and manual cleaning is required to further perform the task

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