초록 ▼

A piping leakage detecting apparatus includes a high pressure gas supply source, a gas implement connected to the high pressure gas supply source via a pipeline, and a switching device mounted on the pipeline for selectively opening and closing the pipeline. A pressure detecting device is mounted be

A piping leakage detecting apparatus includes a high pressure gas supply source, a gas implement connected to the high pressure gas supply source via a pipeline, and a switching device mounted on the pipeline for selectively opening and closing the pipeline. A pressure detecting device is mounted between the gas implement and the switching device for detecting the gas pressure inside the pipeline. A leakage judging device is provided to judge that gas leaks when no gas is being used and when a pressure drop is detected based on an output from the pressure detecting device, while the pipeline is being opened and closed by the switching device.

대표청구항 ▼

[ We claim:] [1.] A piping leakage detecting apparatus for use with a high pressure gas supply source having a gas feed port and a pipeline communicating with the gas feed port of the high pressure gas supply source, said apparatus comprising:a pressure adjusting and supply means, to be mounted on t

[ We claim:] [1.] A piping leakage detecting apparatus for use with a high pressure gas supply source having a gas feed port and a pipeline communicating with the gas feed port of the high pressure gas supply source, said apparatus comprising:a pressure adjusting and supply means, to be mounted on the pipeline, operable for starting gas supply when a gas pressure inside the pipeline decreases to a predetermined supply start pressure, and for stopping gas supply when the gas pressure in the pipeline increases to a supply stop pressure higher than said supply start pressure;a pressure detecting means for detecting the gas pressure inside the pipeline;a pressure drop time measuring means for outputting a pressure drop time period during which the gas pressure detected by said pressure detecting means decreases from said supply stop pressure to said supply start pressure after stoppage of gas supply, or during which the gas pressure detected by said pressure detecting means decreases from a first specified pressure set below said supply stop pressure to a second specified pressure set above said supply start pressure;a leakage judge time memory means for storing a predetermined leakage judge time period within which the gas pressure inside the pipeline would decrease from said supply stop pressure to said supply start pressure when gas in the pipeline leaks or within which the gas pressure inside the pipeline would decrease from said first specified pressure to said second specified pressure when gas in the pipeline leaks; anda leakage judging means for judging presence of gas leakage, and outputting a leakage signal, when said pressure drop time period falls within said leakage judge time period.