Device for power transmission transformer

The invention discloses a device for a power transmission transformer, and the device comprises a drainage mechanism which comprises a box body, a diversion assembly disposed at the top of the box body, a water storage assembly disposed in the box body, and a drainage assembly disposed in the box body; the triggering mechanism comprises a driving assembly arranged on the box body and an opening and closing assembly arranged in the box body, rainwater is guided into the containing cavity through the flow guide holes by means of a drainage slope in the drainage mechanism in rainy days, the rainwater is stored through the water storage frame, and when the rainwater accumulation amount is enough, the opening and closing assembly is opened and closed. Under the action of the gravity of rainwater, the water storage frame is driven to rotate along the limiting rail, the rainwater in the water storage frame is poured into the lower slow flow wheel, meanwhile, the driving assembly can drive the opening and closing ass