Title:
VERTICAL SHAFT PUMP
Document Type and Number:
WIPO Patent Application WO/2019/171774
Kind Code:
A1
Abstract:
A vertical shaft pump 10 is provided with: a pump casing 12 disposed in a water intake tank 1; an impeller 25 disposed so as to be located at a water discharge start water level LWL; swirl prevention piping 30 which suppresses the generation of an air intake swirl Sv; and air supply piping 38 for supplying air into the pump casing 12. The swirl prevention piping 30 is provided with: an annular horizontal pipe 32 which surrounds the pump casing 12; and a first vertical pipe 35A, the lower end of which is connected to the horizontal pipe 32 and the upper end of which is closed. The air supply piping 38 is provided with: a first air intake pipe 40, one end of which is disposed at the water discharge start water level LWL in the water intake tank 1, and the other end of which is disposed within the first vertical pipe 35A; and an air supply pipe 50, one end of which is connected to the horizontal pipe 32, and the other end of which is connected to the pump casing 12 at a position below the impeller 25.
More Like This:
| JPH057995 | [Name of invention] Noise reduction device for sheet metal pumps |
| JP3724197 | MOTOR-DRIVEN BLOWER |
| JP3854309 | Airfoil noise control |
Inventors:
KANEMORI YUJI (JP)
Application Number:
PCT/JP2019/001233
Publication Date:
September 12, 2019
Filing Date:
January 17, 2019
Export Citation:
Assignee:
TORISHIMA PUMP MFG CO LTD (JP)
International Classes:
F04D29/66; F04D13/00
Foreign References:
| JP2009203806A | 2009-09-10 | |||
| JPH0476998U | 1992-07-06 | |||
| JP2004239215A | 2004-08-26 | |||
| JP2013217217A | 2013-10-24 | |||
| CN102094742A | 2011-06-15 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
Download PDF: