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    • 2. 发明授权
    • Fire extinguisher
    • 灭火器
    • US4078614A
    • 1978-03-14
    • US671170
    • 1976-03-29
    • George P. Hay
    • George P. Hay
    • A62C13/64A62C37/50A62C37/06
    • A62C37/50A62C13/64
    • A fire extinguisher includes a pressure vessel containing an extinguishing agent and pressurized gas and a valve remotely operated by a manual control at the outlet end of the delivery hose for controlling the discharge of the extinguishing agent from the pressure vessel to the delivery hose. This discharge control valve is opened and closed by a pneumatic cylinder operated by pressurized gas from a valve pneumatically operated by a manually actuated valve mounted near the outlet end of the delivery hose. For purging the hose of accumulated dry chemical, a second valve is positioned in the discharge conduit between the discharge control valve and the hose and is arranged to open and close simultaneously with the main discharge valve responsive to actuation of the valve at the outlet end of the discharge hose; a second manually actuated valve is provided to permit the second valve in the discharge conduit to be opened even though the main discharge valve is closed, and there is a gas pressure line from the pressure vessel to the discharge conduit between the main discharge control valve and the second control valve therein whereby gas pressure from the vessel is introduced into the discharge conduit when the main valve therein is closed to purge the discharge hose of dry chemical therein and to fluidize dry chemical in the discharge conduit when the main valve is open. The system also includes a three-way manually actuated vent valve in the line connecting the pressure vessel to the pressure gauge whereby prior to testing pressure the pressure gauge can be exhausted and sticking eliminated, so as to assure an accurate pressure reading at any time.
    • 灭火器包括容纳灭火剂和加压气体的压力容器和通过在输送软管的出口端通过手动控制远程操作的阀,用于控制灭火剂从压力容器排放到输送软管。 该排放控制阀由气动缸打开和关闭,该气缸由加压气体从由安装在输送软管出口端附近的手动致动阀气动操作的阀门操作。 为了清除积聚的干燥化学品的软管,第二阀定位在排放控制阀和软管之间的排放管道中,并且被布置成与主排出阀同时打开和关闭,响应于阀的出口端处的阀的致动 排放软管; 设置第二手动致动阀以允许排放管道中的第二阀打开,即使主排气阀关闭,并且存在从压力容器到主排出控制阀和排出管之间的排出管道的气体压力线 其中的第二控制阀,当其中的主阀关闭时,来自容器的气体压力被引入排放管道,以在主阀打开时清除干燥化学品的排出软管并使排出管道中的干燥化学品流化。 该系统还包括将压力容器连接到压力计的管路中的三通手动致动排气阀,由此在测试压力之前,压力计可以被排出并粘附消除,以便在任何时间确保精确的压力读数。