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Title:
SELF SUCKING-TYPE CENTRIFUGAL PUMP DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/022121
Kind Code:
A1
Abstract:
In the present invention, a pump device is obtained that demonstrates high self-sucking and pumping-up performance, and that can easily perform stationary cleaning or breakdown cleaning that satisfy sanitary methods. A self sucking-type centrifugal pump is provided with two vortex-shaped chambers, a large and a small; the space between the location at which the small vortex-shaped chamber begins and the outer circumferential portion of an impeller is made larger than the space in the large vortex-shaped chamber; during a self-sucking operation a self-sucking water circulation flow is generated from the small vortex-shaped chamber towards the large vortex-shaped chamber, and a discharge part of the large vortex-shaped chamber ejects self sucked water that is from the small vortex-shaped chamber to a self sucked water separation chamber that is formed in an upward barrel shape so that moisture separation is performed; wherein the casing inner circumferential portion is formed in a concentric circular shape having a predetermined space between the casing inner circumferential portion and the impeller outer circumferential portion; in the circular space between the casing and the impeller, a defining member is provided that protrudes from the casing inner circumferential portion towards the vicinity of the impeller outer circumferential portion so as to form the small vortex-shaped chamber and the large vortex-shaped chamber; and flow paths that extend from the large and small vortex-shaped chamber to the self sucked water separation chamber are divided so as to be joinable at mid-points of the flow paths, and the self sucked water separation chamber is configured so as to be detachable from the casing.

Inventors:
YOKOTA Hiroshi (Minamiyoshijima 1-chomeNaka-ku,Hiroshima-sh, Hiroshima 26, 〒7300826, JP)
横田 博 (〒26 広島県広島市中区南吉島一丁目3番6号 株式会社横田製作所内 Hiroshima, 〒7300826, JP)
NISHI Fumio (Minamiyoshijima 1-chomeNaka-ku,Hiroshima-sh, Hiroshima 26, 〒7300826, JP)
西 文夫 (〒26 広島県広島市中区南吉島一丁目3番6号 株式会社横田製作所内 Hiroshima, 〒7300826, JP)
Application Number:
JP2012/070776
Publication Date:
February 14, 2013
Filing Date:
August 09, 2012
Export Citation:
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Assignee:
KABUSHIKI KAISHA YOKOTA SEISAKUSHO (3-6Minamiyoshijima 1-chome, Naka-kuHiroshima-sh, Hiroshima 26, 〒7300826, JP)
株式会社 横田製作所 (〒26 広島県広島市中区南吉島一丁目3番6号 Hiroshima, 〒7300826, JP)
YOKOTA Hiroshi (Minamiyoshijima 1-chomeNaka-ku,Hiroshima-sh, Hiroshima 26, 〒7300826, JP)
横田 博 (〒26 広島県広島市中区南吉島一丁目3番6号 株式会社横田製作所内 Hiroshima, 〒7300826, JP)
NISHI Fumio (Minamiyoshijima 1-chomeNaka-ku,Hiroshima-sh, Hiroshima 26, 〒7300826, JP)
International Classes:
F04D9/02; F04D29/70
Foreign References:
JPS293025B1
JPS28772Y1
JPH02163493A1990-06-22
JP2007327393A2007-12-20
JPS3815529B1
JPS296490B1
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Claims: