Manual pipe expander with pipe expanding mechanism

The manual pipe expander with the pipe expanding mechanism comprises a connecting pipe, an adjusting screw rod and a connecting plate, a threaded pipe sleeve is fixedly connected to the interior of the top end of the connecting pipe, the adjusting screw rod is connected to the interior of the threaded pipe sleeve in a threaded mode, and a fixing structure is arranged in the outer side wall of an inserting pipe. According to the utility model, through the arrangement of the dismounting structure, under the embedding structure of the empty groove and the expansion tube head, the expansion tube head can be inserted into the empty groove, and when the fixing nut rotates downwards, the outside of the embedding groove is extruded by the fixing nut, so that the embedding groove begins to contract inwards and extrudes the outer side wall of the expansion tube head; when the expansion tube head needs to be replaced, only the fixing nut needs to be reversely rotated to move upwards along the external thread of the adju