External coating device convenient to overturn and used for robot machining

The external coating device comprises a device main body and a device supporting column, an equipment plate is arranged above the left wall of an inner cavity of the device main body, a cavity is formed in the equipment plate, nozzles are connected to the right side of the equipment plate in an array mode, a guide pipe is connected to the middle of the left side of the equipment plate, and the guide pipe is connected to the right side of the equipment plate. An air heater is connected to the upper portion of the left side of the device body, the left end of the guide pipe penetrates through the left side of the device body and communicates with the air heater, through holes are formed in the right side of the device body in an array mode, a mounting frame is arranged at the bottom of the air heater and is of an L-shaped structure, and the right side of the mounting frame is attached to the device body. After coating of the service robot is finished, the air heater is started, hot air is guided to the robot, a