Drilling grouting device of monitoring instrument

A monitoring instrument drilling grouting device relates to the field of safety monitoring. The drilling grouting device of the monitoring instrument comprises a main steel cylinder, a drainage pipe, an exhaust pipe, a pressure gauge, a main grouting pipe, a supplementary grouting pipe, an in-hole grouting pipe, an in-hole exhaust pipe, a flange plate, a pre-embedded steel pipe and a displacement measuring assembly, the pre-embedded steel pipe is pre-embedded at an orifice of a drill hole, and the main steel cylinder is connected with the pre-embedded steel pipe through the flange plate; the main grouting pipe and the supplementary grouting pipe are both installed at the end of the main steel cylinder and communicate with the interior of the main steel cylinder. The drain pipe is arranged below the main steel cylinder; the exhaust pipe is arranged on the main steel cylinder; the in-hole grouting pipe, the in-hole exhaust pipe and the displacement measuring assembly are all installed in the main steel cylinder