Lens demisting device of prefabricated pipe pile drilling television tester

The utility model discloses a lens demisting device for a prefabricated pipe pile drilling television tester, which comprises a drilling television tester, the drilling television tester consists of a top cover, a system control area, a camera shooting area and a base, and a demisting device is arranged on the outer side wall of a shell of the system control area; the demisting device comprises a bolt connection air cylinder and an outer ring sleeve, an inner ring sleeve is arranged between the inner side wall of the outer ring sleeve and the outer side wall of the system control area shell in an up-down sliding mode, and a plurality of annular mist scraping pieces are integrally connected to the inner side wall of the inner ring sleeve. The top of the inner ring sleeve abuts against an annular baffle on the inner side wall of the top of the outer ring sleeve, and a threaded opening in the bottom of the outer ring sleeve is connected with an annular cover. According to the structure of the utility model, when