| 摘要 |
PURPOSE:To reduce damages to be made on solid materials and provide higher transfer ability by connnecting a rotary solid material pump and a sealed-tank solid material pump in series in a transfer system suited for transferring fishes together with sea water. CONSTITUTION:When unloading fishes out of a fish tank 30, first an air pump 3 is operated with a four-way valve 2 positioned at the solid line, to reduce the pressure in a sealed tank 1 which is the main body of a sealed-tank solid material pump. At this stage, check valves 5 and 6 are opened and closed respectively to allow the fishes and water in the fish tank 30 to be sucked up into the tank 1, and also to be flown into a rotary solid material pump 20 from which the air is discharged through an exhaust pipe 34. Then, the pump 20 is operated when the level of the water surface in the tank 1 reachs the middle point, and the air pump 3 is stopped when the level reaches the upper limit level. The fishes and water being transferred by pressure through the pump 20 are led to a water filtering separator 24 where fishes are separated from sea water through a selector comb 27. |
