Patent ID: 8061385
Filing Date: 2011-11-22
Classification: F16K,Y10T

Abstract:
1. A combined safety valve comprising: a first safety valve formed of a pilot-type three-port valve; and a second safety valve formed of a pilot-type three-port valve, the first and second safety valves being separatably coupled via a connecting implement in a condition of communicating an out-port of the first safety valve and an in-port of the second safety valve, wherein a first connecting portion on an out-port side of the first safety valve includes a first coupling frame fixed to a first valve body, the first coupling frame being a separate component from the first valve body, a first connecting surface being located on the first coupling frame where the out-port is opened, and first coupling projections being located on both side end portions of the first connecting surface, respectively, wherein a second connecting portion on an in-port side of the second safety valve includes a second coupling frame fixed to a second valve body, the second coupling frame being a separate component from the second valve body, a second connecting surface being located on the second coupling frame where the in-port is opened, and second coupling projections being located at a position corresponding to the first coupling projections of the first safety valve, on both side end portions of the second connecting surface, respectively, wherein the connecting implement includes wherein the plate-shaped member includes wherein the coupling member fixes the first and second coupling projections of the first coupling frame and the second coupling frame, which face each other, by tightening in a mutually approaching direction.