Submersible robot for internal inspection of extra-high voltage alternating-current transformer

The invention relates to a submersible robot for the internal inspection of an extra-high voltage alternating-current transformer. The submersible robot comprises a dish-shaped shell, a penetrating cavity is formed in the center of the dish-shaped shell, a horizontally-arranged propeller and a vertically-arranged oil discharge rotating sleeve are installed in the penetrating cavity, and an inner cavity of the oil discharge rotating sleeve is communicated with the penetrating cavity. According to the submersible robot for the internal inspection of the extra-high voltage alternating-current transformer, the maintenance process is simplified, the workload of on-site maintenance personnel is greatly reduced, the surface of the transformer is not prone to being impacted, and the internal structure of the transformer is well protected; and a camera located in the robot can synchronously rotate according to the oil discharge direction, it is guaranteed that the camera is located at the front end of the advancing di