| 摘要 |
A DEVICE FOR LOWERING AND RAISING OF REARING UNITS (1) IS PROVIDED WITH A FLOATING COLLAR (2) COMPRISING INNER AND OUTER FLOATING RING (3, 4). THE FLOATING RINGS (3, 4) ARE HOLLOW, AND NORMALLY CLOSED AGAINST THE WATER, SO THAT THE REARING UNIT IS FLOATING ON THE WATER SURFACE. THE DEVICE COMPRISES WATER CHARGING MEANS (9A, 9B) HAVING A VALVE MECHANISM (10), AND WHICH ARE SITUATED ON THE INNER, RESPECTIVELY OUTER FLOATING RING (3, 4). THROUGH THE WATER CHARGING MEANS (9A, 9B), WATER CAN BE LET INTO AND OUT OF THE FLOATING RINGS (3, 4) AT LOWERING, RESPECTIVELY RAISING. THE DEVICE FURTHER COMPRISES AIR RELIEF MEANS (11A, 11B), WHICH ARE SITUATED ON INNER, RESPECTIVELY OUTER FLOATING RING (3, 4), DIAMETRICALLY OPPOSITE OF THE WATER CHARGING MEANS (9A, 9B), IN ORDER TO LET AIR OUT OF AND INTO THE FLOATING RINGS (3, 4) AT LOWERING, RESPECTIVELY RAISINGFIG. 1) |
