Sampling device for oxygen-nitrogen-hydrogen analyzer

The utility model belongs to the technical field of sampling equipment, and particularly relates to a sampling device for an oxygen-nitrogen-hydrogen analyzer, which comprises a sampling pipe, a fixed joint is fixedly assembled at the top of the sampling pipe, an extension rod is arranged above the sampling pipe, the fixed joint is sleeved on the extension rod, a plurality of clamping grooves are arranged at the top of the extension rod, and the clamping grooves are communicated with the sampling pipe. A plurality of clamping grooves are formed in the inner cavity of the sampling tube and are uniformly distributed in the direction of the extension rod, a buckling part is arranged at the top of the fixing joint in a penetrating manner, the bottom end of the buckling part is clamped into one of the clamping grooves, a fixing plate is fixedly arranged in the inner cavity of the sampling tube, a containing bin is arranged below the fixing plate, a deoxidizing agent is arranged in the containing bin, and the botto