Title:
MULTI-POINT WATER LEVEL DETECTION FLOAT, AND AUTOMATIC OPERATION TYPE UNDERWATER PUMP USING THE SAME
Document Type and Number:
Japanese Patent JP2015045257
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an automatic operation type underwater pump capable of detecting plural water levels with one float switch without providing plural float switches.SOLUTION: In the automatic operation type underwater pump with a motor 3 as a prime mover, a magnetic body 11 that can move into a bent tube body 10 is filled in one float 6 tethered to the automatic operation type underwater pump so that the floating posture varies as the water level increases or decreases, and first and second lead switches 9A, 9B are provided at both ends of the tube body. As the floating posture of the float 6 varies, according to detection signals corresponding to respective water levels obtained when the magnetic body 11 approaches to or is isolated from the first and second lead switches 9A, 9B, the motor 3 is started at an operation water level h3, and the motor 3 is stopped at a stopping water level h2. At an abnormal water level h5, the motor 3 is configured to cope with an emergency operation.
Inventors:
MIYOSHI HIROYASU
FUKUDA MASAHIKO
FUKUDA MASAHIKO
Application Number:
JP2013176420A
Publication Date:
March 12, 2015
Filing Date:
August 28, 2013
Export Citation:
Assignee:
TSURUMI MFG
International Classes:
F04D15/00; F04D13/08
Domestic Patent References:
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