초록 ▼

A valve stem gas leak sensor or detector configured to surround a possibly leaking petrochemical or like flow line valve stem and provide for external monitoring equipment an electrical resistance related to the amount of hydrocarbon gas leakage occurring around the valve stem. Such a gas leak detec

A valve stem gas leak sensor or detector configured to surround a possibly leaking petrochemical or like flow line valve stem and provide for external monitoring equipment an electrical resistance related to the amount of hydrocarbon gas leakage occurring around the valve stem. Such a gas leak detector, termable a ring sensor, is configured as a stem surrounding enclosure, with interconnecting segments for ease of installation around and removability from a valve stem, with one or both of each such segments having an interiorly arranged layer of gas sensor particulate material characterized by change in electrical resistance in the presence of a changing concentration of hydrocarbon gas leakage around a valve stem, and with interengaging connector/conductor pins holding the segments together around the valve stem and across which the electrical resistance of one or both gas sensor material layers can be measured with the ring sensor in place on the valve stem.

대표청구항 ▼

A valve stem gas leak sensor comprising a generally cylindrical enclosure closely surrounding the valve stem of a possibly leaking petroleum flow line valve, said cylindrical enclosure being situated adjacent the valve packing gland and being interiorly open around said valve stem, a hydrocarbon gas

A valve stem gas leak sensor comprising a generally cylindrical enclosure closely surrounding the valve stem of a possibly leaking petroleum flow line valve, said cylindrical enclosure being situated adjacent the valve packing gland and being interiorly open around said valve stem, a hydrocarbon gas sensing material layer on the interior surface of said enclosure, and electrical conductor means electrically connected to said hydrocarbon gas sensing material with portions of said conductor means exposed exteriorly of said enclosure so as to be contactable by external monitoring equipment which, by sensing a change in the electrical resistance of said gas sensing material caused by adsorption of hydrocarbon gas into the sensing material layer, provides an indication of there being hydrocarbon gas present interiorly of said enclosure, said generally cylindrical enclosure comprising two substantially semi-cylindrical segments, each having mating surfaces designed to mate together in a complementary manner with metallic pins in one segment fitting in jacks in the other segment which are arranged to hold said segments together around the valve stem.