Pressurized driller for pipeline

The utility model relates to a hole opening machine of a gas-liquid pipeline with the pressure under the state of the constant flow; wherein a shaft core hole of a flange cylinder is provided with a cylinder drill rod through an oil seal, the left end of the cylinder drill rod is fixed on the cylinder drill and its right end is fixed on a drive sleeve through a thrust bearing, the drive sleeve is provided with a nut, the left end of a lead screw meshed with the nut is hinged on the flanged cylinder and its right end is fixed on a handle, the drive sleeve is embedded with a gap in a long groove of a fixed cylinder generatrix and can slide along the long groove, the left end of the fixed cylinder is fixed on the flange cylinder and its right end is fixed on a deceleration motor, an output shaft of the deceleration motor is fixed on the right end of the fixed drive shaft, the drive shaft can be slidably inserted in the shaft hole of the cylinder drill rod through a guide key. The utility model has the advantages of the simple structure, the easy processing and manufacture, the convenient use & installation, and the safety & reliability.