Abstract: In order to solve the problems of precise grading and screening of fish fry and lack of counting device in industrial aquaculture ponds, a rotary live fish grading and counting device was designed for the grading and counting of live fish fry. After the fishes were pumped from the pond to be graded to the rotary live fish grading and counting device by suction pump, the fish fries were classified into three sizes, then the number of fish fries of each size was counted by the counting device in the pipe, and finally fish fries of different sizes were put into their respective aquaculture ponds. Grading sizes can be adjusted by touching the control panel. According to the width of the back of the fish, the live fish that can be graded is 1~30 mm wide in the back, and the accuracy is 1 mm. The grading device is equipped with a frequency conversion motor, and the rotating speed of the rotary device can be adjusted through the touch screen. The adjustment range is 6~15 r/min. Rainbow trout was selected for the experiment, and the width of the fish back was 9~26 mm. The results show that: when the speed is 8 r/min, the maximum deviation is 2 mm; the grading efficiency is 9 600~14 400 pieces /h, the grading error rate is 4.4%~5.5%, and the counting error rate is 2.5%~4.5%. The device can better meet the requirements of simultaneous grading and counting of live fish in industrial aquaculture ponds.

Key words: industrial aquaculture, live fish grading, live fish counting, automatic control, aquacultural machinery
     

摘要： 为解决工厂化养殖水池中存在鱼苗精准化分级筛选和计数机械装备欠缺的问题，设计了一种用于活鱼幼苗分级和计数的回转式活鱼分级计数设备。通过吸鱼泵将鱼从待分级养殖池塘中抽吸到回转式活鱼分级计数装置，首先将鱼苗分级成3种规格，再通过管道内的计数装置统计各规格鱼苗个数，然后将不同规格的鱼苗放入各自养殖池塘中。分级规格参数可通过触摸控制面板调节。按照鱼体背部宽度分级，可分级的活鱼为背宽1~30 mm，精度1 mm；分级装置安装有变频电机，通过触摸屏可调节回转装置转速，调节范围6~15 r/min。 选用虹鳟鱼进行试验，鱼背宽度9~26 mm。结果显示：当转速为8 r/min时，最大偏差2 mm；分级产量为9 600~14 400条/h，分级误差率4.4%~5.5%，计数误差率2.5%~4.5%。该装置可较好地满足工厂化养殖水池活鱼同时分级和计数的要求。

关键词: 工厂化养殖, 活鱼分级, 活鱼计数, 自动控制, 养殖机械