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1. 发明公开

EP0713568A1 AN EXCESS-FLOW SAFETY SHUT-OFF DEVICE 失效
标题翻译： ABUNDANCE安全装置报表
公开(公告)号：EP0713568A1
公开(公告)日：1996-05-29
申请号：EP94922202.0
申请日：1994-08-08
申请人： Esplin, Trevor Thomas , Morrison, Walter , Morrison, Jean
发明人： Esplin, Trevor Thomas , Morrison, Walter , Morrison, Jean
IPC分类号： F16K17 , F17C13
CPC分类号： F17C13/123 , F16K17/285 , F17C2205/0332 , F17C2205/0382 , F17C2221/035 , F17C2223/0153
摘要： A fluid flow safety device comprises a body having an inlet end for connection to a fluid supply and an inlet passageway (8, 48, 103) which leads to a selective fluid flow sensor chamber (9, 49, 115) having a sealing means (10, 50) which encircles the outlet orifice (11, 51) of smaller cross section than that of the sensor chamber, said outlet orifice leading from the sensor chamber into a pressure chamber (12, 52) within the body leading to an outlet. Between the inlet end of the sensor chamber and the sealing means is a tapered section (13, 117), wherein the bore of the sensor chamber decreases in diameter as it nears the sealing means. A sensor chamber shield (120) may encircle the sensor chamber by forming , defining and separating the internal length of the sensor chamber passageway from that of the inlet or any other passageway. A ball (16, 56, 119) in the sensor chamber moves between the inlet passageway end of the sensor chamber and the outlet orifice, to form a seal with the sealing means when flow through the sensor is above a predetermined value. Within the pressure chamber is a movable piston (20, 60, 131) in sealing contact with it to increase or decrease the volume of the pressure chamber. Movement of the movable piston form a rest position fully towards the sensor chamber will deny a seal to made between the ball and the sealing means. The movable piston may be a primary valve mechanism which forms a seal between the inlet and outlet passagways. The movable piston may include an indicator mark visible only when the pressure in the pressure chamber is avove a predetermined value. Embodiments for LP gas include separate use of sensor chamber or movable piston with or without primary valve.

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