Looped network photoelectric switch

The utility model relates to the field of switches, in particular to a ring network photoelectric switch which comprises a switch, a U-shaped frame is fixedly installed on the outer side surface of the switch, first storage grooves are formed in the two ends of the outer side surface of the U-shaped frame, and clamping assemblies are movably arranged in the first storage grooves. The clamping assembly comprises a connecting piece, a rotating rod, a bolt, a square nut and a conical clamping plate, and a back clamping assembly is fixedly arranged on the outer side surface of the U-shaped frame. According to the utility model, when the hanger is used for installation, the switch can be pre-installed at the square hole strip of the cabinet through the clamping assembly, and the clamping assembly, the square hole strip and the switch are directly fastened through the bolts, thereby replacing the cooperation of two persons for installation, simplifying the installation process, facilitating the installation of a si