Boiler detection sampling device

The utility model relates to the technical field of boiler detection and sampling, and discloses a boiler detection and sampling device which comprises a round cover, a through hole is formed in the center of the round cover, a collecting box is fixed to the top of the round cover, an air pump is fixed to the top of the collecting box, a one-way valve is fixed in the collecting box, and the one-way valve is fixed to the bottom of the collecting box. An air outlet pipe is arranged on the surface of the collecting box, a cavity is formed in the round cover, a sliding groove is formed in the bottom of the inner wall of the cavity of the round cover, the adaptation assembly comprises a sliding rod, and the sliding rod is slidably connected to the sliding groove in the inner wall of the cavity of the round cover. The sliding rods can be driven by the pull rods to move inwards or outwards, so that the connecting plates move inwards or outwards, the connecting plates are attached to the inner wall or the surface of