Cyclone desander with sieve plate convenient to replace

The cyclone desander comprises a supporting frame, a desander body is arranged on the supporting frame, a cover body is arranged on the upper end face of the desander body, the cover body and the desander body are connected through two threaded rods, a connecting rod is arranged on the cover body in a penetrating mode, the screen plate is arranged on the lower end face of the connecting rod, and the screen plate is arranged on the lower end face of the connecting rod. The upper end face of the sieve plate is fixedly connected with a connecting block, the connecting block is connected with the connecting rod through a mounting block, two mounting cavities are formed in the connecting block, limiting mechanisms are arranged between the two mounting cavities and the mounting block, and two control rods slidably connected with the connecting block are arranged on the side wall of the connecting block in a penetrating mode; and linkage mechanisms are arranged between the two control rods and the corresponding moun