Arc-resistant explosion-proof fire extinguishing box device for medium-voltage cable joint

The utility model relates to the technical field of cable protection, in particular to an arc-resistant explosion-proof fire extinguishing box device for a medium-voltage cable joint, which comprises a shell component, and the shell component comprises a C-shaped upper shell, a U-shaped lower shell, and a C-shaped end shell and a U-shaped end shell which are respectively arranged at two ends of the C-shaped upper shell and the U-shaped lower shell. Panels on the front side and the rear side of the bottom of the C-shaped upper shell are fixedly connected with panels on the front side and the rear side of the U-shaped lower shell through fixing bolts, and the C-shaped end shell and the U-shaped end shell are fixedly mounted on the corresponding C-shaped upper shell and the U-shaped lower shell through mounting bolts respectively. The device is applied to arc resistance, fire prevention, explosion prevention and active self-extinguishing of 10kV cable intermediate joints with various cross sections, and prevents