Automatic grading device for larimichthys crocea fry

Abstract

The invention provides an automatic grading device for larimichthys crocea fry. The automatic grading device comprises a base, a movable frame is arranged in the base, two fixing plates are fixedly connected to the inner bottom wall of the base, the two fixing plates are located on the two sides of the movable frame respectively, the inner top wall and the inner bottom wall of the movable frame are each provided with two first racks, a power motor is fixedly connected to the exterior of the base, the driving end of the power motor penetrates through the side wall of the base, extends into the base and is fixedly connected with a half gear, the half gear is in intermittent meshing connection with the two first racks, a screening box is fixedly connected to the upper surface of the movable frame, a plurality of screening frames are arranged in the screening box, the fixing plates are fixedly connected to the lower surfaces of the screening frames, a screening net is fixedly embedded in the middle of each fixing plate, sliding rails are arranged on the two inner side walls of the screening box, the two side walls of the fixing plate are slidably connected with the sliding rails, an L-shaped limiting plate is fixedly connected to the side wall of one end of each sliding rail, and a rotating rod is rotationally connected to the side wall, close to the L-shaped limiting plate, of each fixing plate.

Description

technical field [0001] The invention belongs to the technical field of fish breeding, and relates to an automatic grading device for raising large yellow croaker seedlings. Background technique [0002] Fishery is an important part of agricultural production. Before putting fish fry in the pond, the most critical step is to sort the fish fry, and put them in different sizes according to the size of the fish fry. In the process of stocking fish fry, in order to prevent the fish fry In the case of large fish eating small fish, or large fish eating small fish, it is generally necessary to sort out fry of the same size or similar size, and raise fry of the same size separately. The traditional sorting method is that workers sort one by one according to experience. This method is time-consuming and laborious, and it is easy to damage the fry, and it is difficult to accurately control the size of the fry. With the development of science and technology, people began to use fish sie...

AI Technical Summary

Problems solved by technology

The traditional sorting method is that workers sort one by one according to experience. This method is time-consuming and laborious, and it is easy to damage the fry, and it is difficult to accurately control the size of the fry. With the development of science and technology, people began to use fish sieves. In the existing technology The fish sieves are screened according to the width of the fish. The fry of different development stages have different sizes, so there will be sieves with different aperture sizes.

[0003] The existing method of grading large yellow croaker fry is to use fishnets with different apertures to screen fry of different sizes in fish ponds. This grading method has the following problems: On the one hand, the aperture of a single fishnet is fixed, and only one size grade of fry can be screened at a time. , if you need to sieve seedlings of multiple sizes and grades, you need to use fishing nets with different apertures to obtain through manual sieving, and the sieving efficiency is low; on the other hand, the sieving method using fishing nets requires manual shaking and screening, which is more laborious , and the strength of artificial shaking is not uniform enough, the strength is small, resulting in insufficient grading and screening, and the strength of shaking is too large, which will easily lead to mechanical damage of fry and reduce the survival rate of fry

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