Airtight type automatic drainage device of radiation monitoring passageway

The utility model belongs to the technical field of the monitoring of nuclear power station radioactive gas, concretely relates to airtight type automatic drainage device of radiation monitoring passageway and method. The utility model discloses a skew T, valve, pipeline and the automatic condensate trap of constituteing the automatic drainage pipeline to and skew T, valve, pipeline and the cask of the manual drain line of constitution. The utility model discloses can avoid monitoring the passageway and measure the cavity and intake and lead to monitoring the passageway instrument and damage or became invalid, improve the operational safety and the availability ratio of monitoring passageway, can prevent externally gaseous against the current to the radiation monitoring passageway in, guarantee the accuracy and the system security of passageway monitoring data, set up manual drain line, in automatic drainage pipeline trouble or when maintaining, can discharge the comdenstion water through this pipeline, put forward the redundancy and the reliability of high radiation monitoring passageway drainage mode.