Anti-blocking screening device for limestone treatment

The utility model discloses an anti-blocking limestone treatment screening device which comprises a base, two sliding grooves are formed in one side of the top of the base, a sliding plate is movably installed on the tops of the two sliding grooves, a fixing bolt is inserted into the sliding plate, two hydraulic telescopic columns are hinged to the top of the sliding plate, and a concave frame is hinged to the tops of the two hydraulic telescopic columns. A first supporting ring is hinged to the inner side of the concave frame, a hollow supporting pipe is movably connected into the first supporting ring in a sleeved mode, and a barrel is fixedly installed on one side of the hollow supporting pipe. Through the arranged hydraulic telescopic column, after multiple times of screening, a certain amount of screened limestone is accumulated in the filter screen cylinder, at the moment, limiting of a fixing bolt to a sliding plate can be relieved, then the hydraulic telescopic column is started, the hydraulic telesco