Oil tank automatic ventilation device for hydraulic operating mechanism

The utility model belongs to the technical field of auxiliary devices of high-voltage switch electrical equipment, and relates to an automatic ventilation device of an oil tank for a hydraulic operating mechanism, which comprises a low-voltage joint assembly, a normally closed electromagnetic valve and a control loop. The low-pressure joint assembly comprises a straight joint, a three-way joint and a right-angle joint; two joints of the three-way joint are respectively connected with the straight joint and the right-angle joint, and the other joint is reserved as an interface of a vacuumizing oil injection device; the straight joint is connected to the oil tank; the normally-closed electromagnetic valve is connected to the right-angle connector and is connected to a control loop; a time-delay relay is added in the control loop, and a time-delay contact is connected with a button switch in parallel. When the energy storage time of the mechanism exceeds the rated energy storage time and energy cannot be stored