Protection mechanism and quadratic element detector

The utility model discloses a protection mechanism and a quadratic element detector, and belongs to the technical field of quadratic element detectors, the device comprises a square support, the square support is composed of two first supporting plates and two second supporting plates, a plurality of first springs are fixedly installed on the outer sides of the first supporting plates, and a plurality of second springs are fixedly installed on the outer sides of the second supporting plates. Locking pieces are symmetrically installed on the second supporting plate in a threaded mode, an inserting groove is formed in the top end of the second supporting plate, an inserting plate is slidably connected into the inserting groove, a top plate is fixedly connected to the top end of the inserting plate, and side plates are symmetrically and fixedly installed at the bottom end of the top plate and the inserting plate; a plurality of second springs are fixedly installed on one side of the side plate, the other ends of