This series of quick-connect couplings for liquefied hydrocarbons is widely applicable at loading platforms in refining enterprises, oil storage and transportation depots, petrochemical plants, and similar facilities. It enables rapid, automated connection during loading and unloading operations. The coupling can be used to transport various media including water,liquefied hydrocarbons, petroleum, and other fluids. It serves as a critical connection device in loading and unloading operations.