Title:
AERATION VALVE AND WASTE WATER PIPE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/169075
Kind Code:
A1
Abstract:
Provided is an aeration valve: which has a simple configuration and thus can be installed substantially in the same space as an aeration pipe without requiring to be increased in the pipe diameter direction; which, at atmospheric pressure or at positive pressure, exhibits high sealing properties while maintaining closed valve conditions; in which, in case of negative pressure, a valve element operates with high responsiveness in conditions of low aeration resistance and a big quantity of evacuated air; and which can reliably settle the negative pressure while suppressing chattering phenomenon. Also provided is a waste water pipe system. The aeration valve is installed so as to be able to open and close by means of a circular plate valve body (23) incorporated in a pipe main body (20) so as to rotate around an axis of rotation (24). The circular plate valve body (23), in case of negative pressure in the pipe main body (20), generates an unbalanced torque that rotates in the opening direction via the axis of rotation (24), and allows admission of air from the outside. In the pipe main body (20), at atmospheric pressure or positive pressure, an unbalanced torque is generated and rotates in the closing direction via the axis of rotation (24) and closes the valve.
Inventors:
AOKI KAZUHIRO (JP)
OBATA HIROSHI (JP)
KOBAYASHI TATSURO (JP)
OBATA HIROSHI (JP)
KOBAYASHI TATSURO (JP)
Application Number:
PCT/JP2018/010590
Publication Date:
September 20, 2018
Filing Date:
March 16, 2018
Export Citation:
Assignee:
KITZ CORP (JP)
International Classes:
F16K24/06; E03C1/122; E03C1/295; F16K1/22; F16K15/03
Foreign References:
| US3941151A | 1976-03-02 | |||
| JPH0725062U | 1995-05-12 | |||
| JPH0242283A | 1990-02-13 | |||
| JPS56134675A | 1981-10-21 | |||
| JP2004257521A | 2004-09-16 | |||
| JPS603386U | 1985-01-11 | |||
| JP2001152880A | 2001-06-05 | |||
| JPH09170665A | 1997-06-30 | |||
| JP2001343075A | 2001-12-14 | |||
| JP2008308824A | 2008-12-25 | |||
| JP2005214007A | 2005-08-11 |
Attorney, Agent or Firm:
KOBAYASHI Tetsuo (JP)
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