Sealing device for casting mould chamber of anti-gravity casting furnace

The invention discloses a sealing device for a casting mould chamber of an anti-gravity casting furnace. The sealing device comprises a communicating part and a sealing part, wherein the communicating part is of a tubular structure formed on the lower wall of the casting mould chamber; the inner furnace cover is positioned in the casting mould chamber; and the driving assembly is located outside the smelting chamber and the casting mold chamber, is in sealed connection with the communicating part and can drive the inner furnace cover to perform vertical relative movement and transverse relative movement relative to the furnace opening so as to close or open the furnace opening. The sealing device is suitable for smelting of a smelting chamber of a high-temperature alloy anti-gravity precision casting furnace and separation and sealing of a riser tube channel and the outside in a vacuum state. The sealing device has the advantages of compact structure, moderate volume, stable operation, sensitive action respon