Sliding contact type bus duct structure with built-in limiting protection

The utility model relates to the technical field of bus ducts, discloses a sliding contact type bus duct structure with built-in limiting protection, and solves the problems that in the using process of a sliding contact type bus duct, after sliding contact connection is carried out, limiting protection is not convenient to carry out, the connection stability is affected, and therefore better practicability is not convenient to achieve. The bus duct comprises a bus duct body, barrier strips are fixedly installed at the top end and the bottom end of the interior of the bus duct body, conducting bars are evenly and fixedly installed at the top end and the bottom end of the interior of the bus duct body and located at the ends, close to ports of the bus duct body, of the barrier strips, and installation grooves are formed in the two sides of the bus duct body. A limiting protection mechanism is mounted in the mounting groove; according to the sliding contact type bus duct provided by the utility model, in the us