Portable gas hydrogen sulfide colorimetric detection device

The utility model discloses a portable gas hydrogen sulfide colorimetric detection device. The device comprises a sampling assembly and a colorimetric assembly, wherein the sampling assembly comprises an air inlet, an air inlet valve, a first pressure gauge, a filter, a dryer, a pressure regulating valve, a second pressure gauge and an emptying valve which are sequentially communicated through a plurality of pipelines; the colorimetric assembly comprises a sampling valve, an exhaust valve and a colorimetric tube which are sequentially communicated through a plurality of pipelines; the sampling valve is communicated with a pipeline between a second pressure gauge and an emptying valve in the sampling assembly through a pipeline; according to the device, the sampling assembly and the colorimetric assembly are combined, so that the integration of gas sampling and hydrogen sulfide colorimetric detection is realized, the hydrogen sulfide gas colorimetric detection steps can be simplified, the colorimetric detectio