Protection device for infrared detector

The utility model discloses a protection device for an infrared detector, which comprises a base, the surface of the base is provided with a placing frame, a protection frame and a support frame, the placing frame is arranged at the center of the base, the protection frame is arranged outside the placing frame, the support frame is arranged outside the placing frame and is in close contact with the placing frame, and the support frame is arranged on the base. Hydraulic cylinders are symmetrically arranged at the inner bottom of the supporting frame, a hydraulic rod sleeve is arranged on the surface of each hydraulic cylinder, an auxiliary rod is connected to the surface of each hydraulic rod sleeve, an auxiliary wheel is rotationally connected to the surface of each auxiliary rod and makes close contact with the inner wall of the supporting frame, and a baffle is arranged between the two auxiliary rods. The baffle is fixedly connected with the auxiliary rod, the hydraulic cylinder drives the hydraulic rod sle