Title:
FLOAT-TYPE CHECK VALVE
Document Type and Number:
Japanese Patent JP2015224490
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a float-type check valve that increases valve closing force of an annular valve seat by using a float while suppressing a drain water flow from being blocked.SOLUTION: A float-type check valve comprises an annular valve seat, a plurality of floats, guide members and a regulation member. The annular valve seat opens in the vertical direction and communicates the upstream side and the downstream side of a drainage system. The plurality of floats are positioned on the downstream side of the lower side of the annular valve seat so as to be movable in the vertical direction, and are arranged vertically. The guide members guide the vertical movement of the plurality of floats. The regulation member regulates a lower limit position of the movement of the plurality of floats. The plurality of floats includes: a first float which floats upward as a drain water level rises, fits into the opening and closes the same to block the annular valve seat, and falls downward as the drain water level descends, releases the opening and opens the annular valve seat; and a second float which is positioned below the first float and floats upward and falls downward as the drain water level changes.
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Inventors:
HIROTANI MASAHISA
Application Number:
JP2014110701A
Publication Date:
December 14, 2015
Filing Date:
May 28, 2014
Export Citation:
Assignee:
TLV CO LTD
International Classes:
E03F7/04
Attorney, Agent or Firm:
Yasushi Sasaki
Satoshi Tajima
Satoshi Tajima