Title:
STIRRING DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/163239
Kind Code:
A1
Abstract:
A stirring device in which a draft tube (30) is provided in a treatment liquid that is stored in a treatment tank, the draft tube being centered on a center axis (J1). An axial-flow impeller (45) is provided inside the draft tube, said impeller (45) being made to rotate around the center axis, whereby the treatment liquid is sent in the liquid-feed direction along the center axis inside the draft tube. A plurality of guide blades (32) are provided in the draft tube proximally with respect to the downstream side in the liquid-feeding direction in relation to the axial-flow impeller. The guide blades describe a tabular configuration that follows the center axis and extends from the inner peripheral surface of the draft tube toward the center axis, the guide blades being supported in a cantilevered state on the draft tube. The edges (331) of the guide blades on the upstream side in the liquid-feed direction are directed gradually further toward the downstream side in the liquid feed direction as said edges get closer to the center axis, whereby foreign matter in the treatment liquid is inhibited from getting caught in the guide blades.
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Inventors:
SHIRAI SHUJI (JP)
YAMASHITA KOJI (JP)
YAMASHITA KOJI (JP)
Application Number:
PCT/JP2015/061758
Publication Date:
October 29, 2015
Filing Date:
April 16, 2015
Export Citation:
Assignee:
HITACHI SHIPBUILDING ENG CO (JP)
International Classes:
B01F27/91
Foreign References:
| US2421191A | 1947-05-27 | |||
| JPS541062Y1 | 1979-01-19 | |||
| JPS5394441A | 1978-08-18 | |||
| JP2010137190A | 2010-06-24 | |||
| US1795588A | 1931-03-10 | |||
| JPS60227821A | 1985-11-13 | |||
| JPH0833896A | 1996-02-06 | |||
| JPS5811029A | 1983-01-21 | |||
| JPS53146264U | 1978-11-17 | |||
| JP2000015075A | 2000-01-18 | |||
| JP2012250153A | 2012-12-20 |
Attorney, Agent or Firm:
MATSUSAKA, Masahiro et al. (JP)
Matsusaka Masahiro (JP)
Matsusaka Masahiro (JP)
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