Hole spraying prevention device for drilling

The utility model discloses a drilling blowout prevention device, which relates to the field of drilling blowout prevention devices, and comprises a mounting frame, a drill bit is arranged on the inner side of the mounting frame, a drilling assembly is arranged at the top end of the drill bit, the drilling assembly comprises a hollow rod fixedly arranged at the top end of the drill bit, and a net-shaped spiral piece is fixedly arranged at the outer end of the hollow rod. The hollow rod and the net-shaped spiral piece form a conveying shaft structure, an inflator pump is arranged at the top of the drilling assembly, and a third motor is installed at the top end of the inflator pump. The drill bit is driven by the third motor to rotate for drilling, the drilling assembly stretches into a hole in the drilling process to convey and discharge chippings such as soil, gravel and the like upwards, the net-shaped spiral piece is of a net-shaped structure, solid chippings can be conveyed upwards through rotation, meanw