Gap adjusting mechanism for 500kV pure air gap lightning arrester

The utility model relates to a gap adjusting mechanism for a 500kV pure air gap lightning arrester, which can resolve the problems that the pure air gap lightning arrester is relatively complicated in mounting and difficult in gap distance adjustment. The gap adjusting mechanism comprises one lightning arrester fixing upper clamping plate fixed on a tower cross arm, and a plurality of lightning arrester fixing lower clamping plates, wherein the left end of the lightning arrester upper clamping plate is provided with a discharge counter, etc. The gap adjusting mechanism for a 500kV pure air gap lightning arrester can be used for interruptedly or continuously adjusting the distance between an discharge gap upper electrode and a discharge gap lower electrode, and is reasonable in structure, convenient in mounting, easy in use and high in reliability.