Vacuum oil quenching furnace with structure for preventing door body from being opened by mistake

The utility model discloses a vacuum oil quenching furnace with a door body mistaken opening prevention structure, which comprises a vacuum oil quenching furnace body, a lock ring and a door body, the left side of the door body is rotatably connected with the left side of the vacuum oil quenching furnace body, a limit block is fixedly welded on the outer wall of the lock ring, a guide block is fixedly welded on the outer wall of the vacuum oil quenching furnace body, and the guide block is fixedly welded on the outer wall of the door body. A limiting rod extending from front to back is movably arranged in the guide block in a penetrating mode, a driving mechanism used for driving the limiting rod to move back and forth in a reciprocating mode is installed on the vacuum oil quenching furnace body, and after the driving mechanism drives the limiting rod to move forwards, the limiting rod is used for abutting against the limiting block so as to prevent the locking ring from rotating relative to the vacuum oil qu