The utility model relates to a quick -setting
cement production equipment, concretely is a concrete mixing box of preventing quick -setting
cement block, to solve the technical problem that
cement slurry is easy to block the support end of stirring shaft and lead to the jamming of stirring shaft in the process of discharging that quick -setting cement, sand and gravel, mixed material etc. are mixed and output in the existing concrete mixing box, the utility model discloses a box body, stirring shaft and sealing device, sealing device includes wear -resistant bottom plate, spacer ring, inner sealing plate and seal ring, wear -resistant bottom plate, spacer ring, inner sealing plate are connected in turn and are pressed tightly in the inside of box body front end board, wear -resistant bottom plate is set in the outside of stirring shaft medium
diameter section, spacer ring and inner sealing plate all are set in the outside of stirring shaft large
diameter section, and wear -resistant bottom plate, inner sealing plate form clearance seal between medium
diameter section and large diameter section respectively, inner sealing plate, wear -resistant bottom plate, large diameter section and spacer ring form a passageway, and seal ring sets up in the passageway, and its inner periphery and large diameter section between seal
solid link, and one side is pressed tightly on wear -resistant bottom plate.