Isolation lock device convenient for reliable operation

The invention discloses an isolation lock device convenient for reliable operation. The isolation lock device convenient for reliable operation comprises a lock cylinder fixed between a mounting bracket and an outer end cover, wherein a rotating arm is connected to the lock cylinder, the other end of the rotating arm is movably connected to a connecting plate, the other end of the connecting plateis movably connected to a lock bolt, a fixed bracket is arranged on the lock bolt in a sleeving manner, the tail end of the fixed bracket is mounted on the mounting bracket, a torsional spring is fixed to the mounting bracket, the other end of the torsional spring is inserted onto a connection of the rotating arm and the connecting plate, and a third washer is arranged on a contact end surface ofthe lock cylinder and the outer end cover; and a first washer and a second washer are successively arranged between the lock cylinder and the outer end cover in the axial direction. Matched with theround washers, the sealing