GN 30 type isolation switch false closing prevention mechanical locking device

The invention discloses an anti-false-closing mechanical locking device for a GN30-type disconnecting switch, the GN30-type disconnecting switch comprises two porcelain insulators which can be butted into a whole, a movable contact and a static contact are respectively arranged in the two porcelain insulators, and the anti-false-closing mechanical locking device is characterized by comprising hoops which can be detachably and fixedly sleeved on the porcelain insulators; connecting pieces are arranged on the outer sides of the hoops, and a supporting rod used for limiting the two hoops to be close to each other is connected between the connecting pieces of the two hoops. During maintenance, the anti-false-closing device is installed at first, and the anti-false-closing device is dismantled until all maintenance work is completed and all pre-inspection and preparatory work before closing are executed. If an operator switches on the GN30 isolating switch which is not prepared for switching on, the false switchin