| 摘要 |
<p>An oxygenating centrifugal pump is primarily for circulating the aerated water in a culture pond for improving water quality. The centrifugal pump generally comprises a flat-bottomed cuplike vessel having a pair of floaters for floating said pump on a water and a plurality of pipy legs for locking the vessel in a bottom of the pond. An inner hollow cylinder closed at its top end is longitudinally and rigidly mounted through a bottom wall of said vessel, an umbrella-shaped diffuser is secured to a lower periphery of said cylinder and a motor driven shaft having an impeller at its lower end portion is longitudinally mounted in said cylinder to define a diffusing passageway between said diffuser and impeller. A plurality of uniformly spaced water intake slots are provided around a peripheral wall of the upper cylindrical portion, a cover plate having several air-intake ports therethrough is rigidly secured around an upper periphery of the upper cylindrical portion, and an air suction pipe is deeply inserted therein through one of the air-intake ports. In addition, a peripheral water spouting device and a suction pump are provided on the cover plate of the hollow cylinder for blowing out a large quantity of bubbles to eliminate a possible current leakage.</p> |
