Ventilation and heat dissipation device of high-voltage looped network switch cabinet

The utility model belongs to the technical field of high-voltage looped network switch cabinets, and discloses a high-voltage looped network switch cabinet ventilation and heat dissipation device which comprises a switch cabinet body, the middle of the top end of the switch cabinet body is fixedly communicated with a ventilation box, the front of the inner wall of the ventilation box is movably sleeved with a gear ring, and the top of the inner wall is movably provided with fan blades. Clamping blocks located in the gear ring are fixedly installed at the two ends of the fan blades correspondingly, and the outer surfaces of the clamping blocks are movably connected with the inner wall of the gear ring. Through the arrangement of the push block, the connecting spring and the check block, the check block is firstly rotated to enable the bottom end of the check block to be completely screwed out of the interior of the ventilation box, then the fixing effect on the fan blades is relieved, and at the moment, the co