Connecting rod floating ball liquid level switch device of tunnel drainage system

The utility model relates to the technical field of sewage discharge, in particular to a connecting rod floating ball liquid level switch device of a tunnel drainage system. Comprising a water tank and a supporting frame arranged in the water tank, a junction box is arranged at the top of the supporting frame, a waterproof box is fixedly arranged at the bottom of the supporting frame, a guide rod is rotationally connected to the bottom of the junction box, a floating ball body is slidably connected to the rod wall of the guide rod, and a limiting ring is further arranged on the guide rod and electrically connected with the junction box; and moving mechanisms are arranged on the two sides of the guide rod in the supporting frame, clamping mechanisms are arranged on the moving mechanisms and can move along the sliding grooves through the moving mechanisms, and a drainage mechanism is arranged in the water tank and is in signal connection with the junction box. The device is fixed stably, the automation degree i