| 摘要 |
An LPG-LNG type mechanical automatic time setting check valve is provided to allow anybody to simply install it in gas pipe equipment or an arbitrarily installed pipe. An LPG-LNG type mechanical automatic time setting check valve includes a fixing cam, a clutch plate(15), a clutch pin(22), a spring(21), a spring(14), a cam(13), and a ninety degree stop pin(23). The check valve includes a rotary cam fixed to the ninety angle fixed to a ball valve pin, a rotary clutch plate connected to a handle pin of the spring to be rotated, a timer rotation supplementing spring wound on the clutch plate connected to a pin rotated by the spring, a cam fixed to a timer case rotating only the clutch plate, a spring pressing the clutch pin so that the clutch pin is engaged with the cam connected to the ball valve pin after the clutch pin is separated to the fixed cam, with the bal pin and the timer pin being separated from each other.
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