Portable waste gas rapid sampling device

The utility model discloses a portable waste gas rapid sampling device which comprises a fixed sleeve, one end of the fixed sleeve is connected with a sampling pipe, one end of the sampling pipe is provided with a sealing cap, the top end of the inner wall of the fixed sleeve is provided with a screw rod, one end of the screw rod is connected with a motor, the screw rod is provided with a screw block, and the screw block is provided with a screw rod. A guide rod groove is formed in the lower portion of the screw rod. The waste gas sampling device has the beneficial effects that the electromagnet and the magnetic block are arranged, in the sampling process, the electromagnet is powered on to adsorb and fix the piston through the magnetic block, the screw block drives the piston to move through the connecting frame, then waste gas is extracted, after extraction is completed, the electromagnet is powered off, fixation is relieved, and at the moment, the sampling pipe is separated from the fixed sleeve; the waste