Title:
VACUUM VALVE CONTROLLER AND VACUUM VALVE UNIT
Document Type and Number:
Japanese Patent JP2017186735
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a vacuum valve controller that has a simple structure comprising one diaphragm and may be housed compactly in a sewage gully.SOLUTION: A vacuum valve controller includes: a casing 22 having a first chamber 26 communicating with a water level detection pipe 14, a second chamber 27 communicating with a suction pipe 11, a third chamber 28 communicating with vacuum piping 103, and a fourth chamber 29 communicating with a piston chamber 12a of a vacuum valve 12 formed inside; a vacuum valve switching mechanism 55 for switching between vacuum and atmospheric pressure supplied for opening/closing the vacuum valve 12; and a diaphragm 25 capable of reciprocating motion integrally with a shaft 23. The fourth chamber 29 is communicated with/blocked from the third chamber 28 and an outside part of the casing 22, by the reciprocating motion of the shaft 23. The shaft 23 moves in a direction to open the vacuum valve 12 when a pressure difference arises between both sides of the diaphragm 25, by bringing air inside the fourth chamber 29 to negative pressure.SELECTED DRAWING: Figure 2
Inventors:
ARAKI TAKEKUNI
Application Number:
JP2016073669A
Publication Date:
October 12, 2017
Filing Date:
March 31, 2016
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD
International Classes:
E03F5/22; E03F7/00
Domestic Patent References:
| JP2000096698A | 2000-04-04 | |||
| JP2011196112A | 2011-10-06 | |||
| JP2011196113A | 2011-10-06 | |||
| JPH1061808A | 1998-03-06 | |||
| JPH11294625A | 1999-10-29 | |||
| JPH07310853A | 1995-11-28 |
Foreign References:
| US20150346734A1 | 2015-12-03 |
Attorney, Agent or Firm:
Yoshifumi Saeki
Ryuichiro Mori
Makiko Otsuki
Yuichiro Kawagoe
Ryuichiro Mori
Makiko Otsuki
Yuichiro Kawagoe