| 摘要 |
PURPOSE:In a submersible tank for an aqualung, to prevent the accident in the water by ejecting micro amount of air into the water when the residual pressure drops below predetermined level and alarming a diver by the sound produced through the ejection. CONSTITUTION:A spring 18 is compressed by an adjusting screw 20 in a pressure detection alarm to compress a valve body 13 to the cylinder side 9 through the spring pressure corresponding to the desired air pressure while at the same time a valve seat 17 is contacted against the valve body 13 through the handle operation then the high pressure air to be fed from a tank 1 through a pressure reducer 2 is injected through a flow-in port 11. Thereafter the handle H is retreated and the air pressure at this time will push the valve body 13 to the valve seat 17 against the pressure of the spring 18. When the air pressure in the tank 1 is consumed and dropped, the valve body 13 is pushed back by the spring 18 thereby the pressurized air at the cylinder 9 side will enter through an air flow-out hole 16 into an outer housing 7 then ejected into the water through an ejection hole 8 and the diver is informed of the air pressure drop in the tank by the ejection sound to be produced at this time. |
