Reconstruction and maintenance device for old inspection well transformation

The utility model discloses an old inspection well transformation construction maintenance device which comprises an annular base, a connecting frame is connected to the interior of the annular base in a bolting mode, a first sleeve is connected to the center of the top of the connecting frame in a bolting mode, a supporting rod is connected to the top of the first sleeve in an inserted mode, and a second sleeve is connected to the top of the supporting rod in an inserted mode. A fixing part is bolted to the surface of the second sleeve, a top plate is bolted to the top of the fixing part, an annular folding heat preservation film is bolted to the bottom of the periphery of the top plate, the left side of the top of the top plate is sleeved with an inlet through a bearing, and the top of the inlet is in threaded connection with an air conveying hose. The supporting rod is inserted into the first sleeve to support the annular folding heat preservation film, the function of conveniently storing the heat preserv