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Title:
【発明の名称】曝気撹拌装置
Document Type and Number:
Japanese Patent JP2951760
Kind Code:
B2
Abstract:
PURPOSE:To surely block the intrusion of air into the aerating and agitating device also used in anaerobic operation, to eliminate the wear of the air blocking part and to prolong the service life of the device. CONSTITUTION:The external air is sucked through a hollow shaft provided with a screw 3 at its tip by the negative pressure generated in the water at the tip of the screw when the screw is rotated, and the sucked air is diffused into the water which is aerated. Air is blocked during anaerobic operation, and the sewage is agitated only by the rotation of the screw. A plug 5 to close the shaft-end opening is arranged in opposition to the end of the hollow shaft 2 to be rotated by a motor 1 and made rotatable concentrically with the hollow shaft. A detaching and attaching mechanism 6 is furnished to the plug 5, and the plug is moved back or forth to close the hollow shaft or to adjust its opening degree.

Inventors:
MUTO EIICHI
FUKUMOTO KAZUTAKA
Application Number:
JP19258291A
Publication Date:
September 20, 1999
Filing Date:
July 05, 1991
Export Citation:
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Assignee:
HITACHI KIDEN KOGYO KK
International Classes:
C02F3/20; C02F3/30; C02F7/00; (IPC1-7): C02F3/20; C02F3/30; C02F7/00
Domestic Patent References:
JP494798A
Attorney, Agent or Firm:
Osamu Mori (1 outside)



 
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