Vortex prevention apparatus in pump
AssigneeEbara Corporation
InventorsMasashi Tagomori, Takashi Enomoto, Tsuyoshi Tomita, Hiroyuki Kato
Life of this patent
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Abstract
A vortex prevention apparatus is combined with a pump, and prevents an air entrained vortex or a submerged vortex from being produced when water in the pump pit is pumped up by a pump. A suction member is disposed in an open water channel and has a suction port. An auxiliary flow-path forming structure is disposed substantially concentrically around the suction member with a gap defined between the auxiliary flow-path forming structure and an outer circumferential surface of the suction member.
Claims24
A vortex prevention apparatus comprising:
- a suction member disposed in an open water channel and having a suction port;
- and
- an auxiliary flow-path forming structure disposed substantially concentrically around said suction member with a gap defined between said auxiliary flow-path forming structure and an outer circumferential surface of said suction member, said auxiliary flow-path forming structure defining an auxiliary flow path.
A vortex prevention apparatus comprising:
- a suction member disposed in an open water channel and having a suction port;
- an auxiliary flow-path forming structure disposed substantially concentrically around said suction member with a gap defined between said auxiliary flow-path forming structure and an outer circumferential surface of said suction member, said auxiliary flow-path forming structure defining an auxiliary flow path;
- and
- a suction cone disposed below said suction port.
A vortex prevention apparatus comprising:
- a suction member disposed in an open water channel and having a suction port, said suction member having at least one through hole;
- and
- an auxiliary flow-path forming structure disposed substantially concentrically around said suction member, said auxiliary flow-path forming structure being fixedly mounted on a free end of said suction member.
A vortex prevention apparatus comprising:
- an inflow water channel structure defining a closed inflow water channel having a laterally open inlet port;
- and
- a flow-rectifying plate disposed above said inflow water channel structure and extending upstream of said inlet port in covering relation to said inlet port, said flow-rectifying plate being disposed substantially horizontally and spaced by a predetermined distance from an upper end of said inflow water channel structure.
Dependencies are inferred from the claim text.