Prefabricated cross beam reinforcing structure of portal steel frame structure factory building

The utility model relates to the technical field of steel structure connecting structures, in particular to a prefabricated cross beam reinforcing structure of a portal steel frame structure factory building, which comprises a prefabricated longitudinal beam, a group of prefabricated cross beams are erected above the prefabricated longitudinal beam, and a group of inserting blocks are arranged on the side walls of the two sides of each prefabricated cross beam. A set of installation grooves are formed in the top of the prefabricated longitudinal beam, a set of rapid reinforcing assemblies are arranged in the installation grooves, and a set of limiting anti-loosening assemblies are arranged beside the rapid reinforcing assemblies. Under the action of the rapid reinforcing assemblies, the prefabricated transverse beam and the prefabricated longitudinal beam can be rapidly connected in a butt joint mode, installation is rapid, and the installation efficiency is high. Under the action of the limiting and anti-loo