Protection device of flame detection probe

The utility model relates to the technical field of flame detection of gas-fired boilers, in particular to a protection device of a flame detection probe. Comprising a flame detection connecting piece, an external thread is machined at the tail end of the right side of the flame detection connecting piece, the outer surface of the external thread is sleeved with a sealing ring and an isolation pressing piece in a clamped mode, the external thread is screwed into a threaded hole, the threaded hole is machined in the tail end of the left side of a soot blowing piece, and a lens mounting groove is machined in the portion, on the left side of the threaded hole, of the soot blowing piece; according to the flame detection probe, aging of the sealing ring can be effectively avoided, condensation water can be effectively prevented from entering the probe, the service life of the flame detection probe is prolonged, and the flame detection probe is high in light transmittance, good in light condensation performance and