Dosing device for dephosphorization in urban sewage treatment

The utility model discloses a chemical adding device for urban sewage treatment and dephosphorization, and relates to the technical field of sewage treatment.The chemical adding device comprises a sewage pool, mounting assemblies are mounted at the two ends of the top of the sewage pool, first connecting plates are mounted at the two ends of the top of the mounting assembly at the left end, and a lead screw is connected between the two first connecting plates through bearings; a servo motor used for driving the lead screw to rotate is installed on one side of the first connecting plate, the outer wall of the lead screw is in threaded connection with a nut, a limiting assembly is installed at the top of the right end installation assembly, a transverse plate is connected between the limiting assembly and the nut, and a pesticide box is installed at the top of the transverse plate. Through cooperative arrangement of the first connecting plate, a limiting assembly, a servo motor, a lead screw and a nut, the serv