Under-pressure humidifying device for pipeline system of laboratory

The utility model relates to an under-pressure humidifying device for a pipeline system of a laboratory. The under-pressure humidifying device comprises a drain pipe, a humidifying tank, a humidifying pipeline, a primary trapping net, a pressure release valve, a wet gas outlet pipeline, a secondary trapping net, a water inlet pipe and a liquid level control valve. The pressure release valve is mounted on the top of the humidifying tank, the drain pipe and supports are mounted at the bottom of the humidifying tank, and the wet gas outlet pipeline, the water inlet pipe and the liquid level control valve are mounted on the humidifying tank; the primary trapping net and the secondary trapping net are positioned between the wet gas outlet pipeline and the water inlet pipe, and a blind plate is mounted on a horizontal section at the tail end of the humidifying pipeline; circular holes are formed in the lower portion of a vertical section of the humidifying pipeline and the horizontal section at the tail end of the humidifying pipeline. The under-pressure humidifying device has the advantages that the under-pressure humidifying device is a closed humidifying system, gas under a certain pressure can be continuously humidified by the under-pressure humidifying device under the pipeline running conditions, and accordingly stable running of the pipeline can be guaranteed; the under-pressure humidifying device is in a secondary filter design, so that liquid splashing in gas and liquid mixing procedures can be effectively reduced owing to multilayer stainless steel filter screens, liquid drops carried by the gas can be reduced, and the stability of saturated wet gas can be guaranteed.