Grinding device for outer surface and notch of HDPE water supply pipe

The utility model relates to a polishing device for an outer surface and a notch of an HDPE water supply pipe, and relates to the technical field of HDPE pipes. The polishing device comprises a polishing roller and an operation table arranged below the polishing roller, two mounting plates are arranged on the upper side of the operation table, one mounting plate is fixedly connected with the operation table, one side of the other mounting plate is rotationally connected with a connecting block, and a clamping mechanism and four sets of pipe abutting mechanisms are arranged on one sides of the two mounting plates respectively. The clamping mechanism comprises a motor, a rotating disc, two clamping blocks, two bolts, two second springs, two mounting grooves, two sliding blocks and two limiting rods, the rotating disc is rotationally connected to one side of the mounting plate, and the clamping mechanism is matched with the grinding roller, so that the water supply pipe can be fixed between the two mounting plat