E - Fixed Constructions – 03 – F
Patent
E - Fixed Constructions
03
F
E03F 1/00 (2006.01) F16K 51/02 (2006.01) G05D 16/16 (2006.01)
Patent
CA 2125206
The vacuum valve includes: a pressure control chamber for giving a vacuum force to a valve body (changeover valve) capable of connecting a valve operating chamber with a vacuum passage; a detecting valve capable of introducing a vacuum force into the pressure control chamber; a plunger directly driven by a liquid detecting diaphragm, wherein the plunger drives the detecting valve; and an opening time adjusting valve which is opened so that the vacuum introduced into the pressure control chamber can be released, wherein the opening time is automatically controlled by the vacuum in the vacuum discharge pipe. Furthermore, when the inside of a liquid level detecting pipe section is quickly decompressed, pressure in a pressure adjusting chamber is quickly released through a gap formed between a damping diaphragm and supporting section. The pressure adjusting chamber is communicated with an upper pressurizing chamber through a communicating hole. Therefore, when the pressure adjusting chamber is quickly decompressed, the upper pressurizing chamber is also quickly decompressed. Due to the foregoing, resilient deformation of a liquid level detecting diaphragm is quickly canceled, and the pushing action conducted by a plunger on a detecting valve is released.
Ohtsuka Tetsushi
Yamabe Yasuo
G. Ronald Bell & Associates
Sekisui Kagaku Kogyo Kabushiki Kaisha
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