Waste gas sampling rifle sealing device and waste gas sampling rifle

The utility model provides a waste gas sampling rifle sealing device and waste gas sampling rifle, include: first shutoff piece and second shutoff piece, first shutoff piece is provided with the through -hole that matches with the outer wall shape of the sampling barrel of waste gas sampling rifle, just, first shutoff piece is equipped with the joint -cutting along the through -hole toward the external -open for establish first shutoff piece cover on the sampling barrel, second shutoff piece can be dismantled with first shutoff piece through coupling mechanism and be connected for the joint -cutting through offer the through -hole that is used for installation sampling barrel on first shutoff piece, is outwards offered along the through -hole to sealed joint -cutting, and second shutoff piece passes through coupling mechanism and links to each other with first shutoff piece, and first shutoff piece can seal the thieff hatch when making the sampling barrel stretch into in the blast pipe through the waste gas t