Protection device applied to underground water quality monitoring and collecting equipment

The utility model discloses a protection device applied to underground water quality monitoring and collecting equipment, which comprises a top plate fixed on the ground through three supporting legs in a circular array, and is characterized in that a retractable protection mechanism is arranged on the outer wall of the top of the top plate and comprises three transmission shafts and four groups of safe retractable assemblies, the three transmission shafts are movably connected to the outer wall of the top of the top plate through supporting plates, the four sets of safe retracting and releasing assemblies are arranged on the transmission shafts in a 90-degree circular array mode, each safe retracting and releasing assembly comprises a transmission plate and a winding drum, and the winding drums are movably connected to the outer walls of the transmission shafts. The four sets of safe winding and unwinding assemblies are arranged, each set of safe winding and unwinding assemblies is provided with one twisted