| 摘要 |
PURPOSE:To prevent speed of fire of working oil in a reservoir tank by connecting one edge of a fire prevention pipe to an exhaust port of an accumulator filled with inert gas and introducing the other edge into the reservoir tank. CONSTITUTION:The working oil 20 in a reservoir tank 15 is sucked by a pump 18 through a filter 21, the pressure of the working oil is increased, and said oil is supplied into each actuator 22, and the inert gas in an accumulator 13 is pressurized. When a fire breaks-out the temperature rises, an explosion prevention valve 9 is opened, and inert gas is released into the reservoir tank 15 through a fire prevention pipe 12 for preventing ignition of working oil 20 due to the fire. The above-mentioned accumulator 13 shall be formed in a bladder type or a floating piston type for practical application and N2 is normally used as inert gas. |
