| 摘要 |
<p>A valve (1) incorporating a system satisfying the conditions required for a high-pressure gas container valve and previously preventing an accident such as a fire or explosion which occurs in such disasters as an earthquake. A ball (20) movable between its stationary position in normal operation and its gas cutting off position in abnormal operation is provided in a gas passage (2) between a branching point leading to a safety valve and a closing valve (5); a taper portion (2a) having a passage narrowed toward the closing valve (5) is provided in the gas passage (2) in the vicinity of the gas cutting off position such that the ball (20) abuts against the taper portion (2a) to close the gas passage (2) at the time of an abnormal outflow of gas. Further, in the state where the container valve is shut down, a terminal end (5a) of a seat packing of the closing valve (5) abuts against the ball to form a gap between the taper portion (2a) and the ball (20). A ball receiver (21) in the form of an umbrella frame raised toward the periphery thereof is provided at the stationary position in normal operation of the ball. <IMAGE></p> |
