| 摘要 |
The invention relates to fish breeding, in particular to an installation for incubation of spawn and keeping of fish prolarvae. The installation includes a rectangular tank (1) with water supply (5) and drain (30) pipes, wherein is placed an incubation chamber (2) for spawn with perforated bottom (4). The installation is also equipped with an automatic water exchange regulation system, consisting of a cylindrical sleeve (8) with a lid (9), wherein is placed a float (12) with ballast (13) and a rod (21), a cylindrical valve (14) with a piston (20) mounted on the lid (9), a pipe for water supply (5) in the reservoir (1), a drain syphon (6), connecting the cylindrical sleeve (8) to the reservoir (1), and a branch pipe for water drainage (16) from the cylindrical sleeve (8). In the float (12), the lid (9) of the sleeve and the bottom of the cylindrical valve (14) are made axial holes (23, 24) for the rod (21), to the upper and lower parts of which are fixed horizontal plates (22) to restrict the movement of the float (12) along the rod (21). The piston (20), the rod (21) and the float (12) are placed coaxially with the possibility of vertical reciprocating movement and overlapping of water supply in the reservoir (1) by means of the piston (20) in the up position of the float (12) and with the possibility of water supply in its lower position. In the side walls of the incubation chamber (2) are made rectangular perforated windows (27) closed outside with elastic membranes (28), the edges of which are tightly attached along the lateral and lower sides of the windows (27) with the formation of a gap between the free edge of the membrane and the upper side of the window for the partial diversion of water from the incubation chamber (2) during the lowering of its level in the reservoir (1). The reservoir (1) is made with the possibility of setting therein several incubation chambers of different dimensions depending on the quantity of spawn placed for incubation and the diameter thereof.
|
