Boiler flue gas sampling device

Abstract

The utility model relates to a boiler flue gas sampling device. The boiler flue gas sampling device comprises a sampling barrel, one end of the sampling barrel is sealed, the other end of the sampling barrel is open, a sample introduction pipe is installed at the open end of the sampling barrel in a guiding and sealing mode, a driving mechanism for driving the sample introduction pipe to move is arranged on the sampling barrel, and a flange in sliding and sealing fit with the sampling barrel is arranged on the outer wall of the end, located in the sampling barrel, of the sample introduction pipe. A sealing plug is arranged at the end, located in the sampling barrel, of the sample feeding pipe, a reset mechanism for driving the sealing plug to seal the sample feeding pipe is arranged on the sample feeding pipe, a sample discharging pipe is arranged on the outer wall of the sampling barrel, a sample bottle is detachably connected to the sample discharging pipe, a first stop valve is arranged on an inlet of the sample bottle, an exhaust pipe is arranged on the sample bottle, and a second stop valve is arranged on the exhaust pipe. A vacuum pump is arranged on the sampling barrel, and a communicating pipe communicated with a sealing cavity defined by the flange, the sampling barrel and the sampling pipe is arranged on the sampling barrel. Compared with the prior art, the sampling speed is increased, and the sampling cost is reduced.

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