Automatic washing device for synthetic furnace sight glasses

The invention relates to the technical field of industrial hydrogen chloride production, in particular to an automatic washing device for synthetic furnace sight glasses. The automatic washing deviceinvolves a synthetic furnace, the upper sight glass, the lower sight glass and an electromagnetic valve, wherein the electromagnetic valve is connected to a PLC control cabinet and a bidirectional self-sealing hydraulic joint, and the bidirectional self-sealing hydraulic joint is connected to an upper sight glass short section and a lower sight glass short section; and each short section comprisesan outer sleeve ring and an inner sleeve ring, each inner sleeve ring is embedded into one of inner holes of the corresponding outer sleeve ring, annular grooves are formed in each inner sleeve ring,the annular grooves in each inner sleeve ring correspond to water supply holes in the corresponding outer sleeve ring, a nozzle is installed in each annular groove, the inner holes of each outer sleeve ring are in a stepped st