The invention provides a butted joint device for an
underwater oil line, which comprises a lower platform, a paw, an upper platform, a paw
hydraulic cylinder, a concave hydraulic butted joint, a convex hydraulic butted joint, a convex hydraulic butted joint driving
hydraulic cylinder, a sliding platform base, convex oil line plugs, concave oil line plugs and a
contact sensor. The upper platform is fixedly connected with an ROV, the paw is articulated with the upper platform, and the lower platform is arranged on the top of an
underwater operating
machine; the convex hydraulic butted joint is fixedly connected with the upper platform of the butted joint device; and the concave hydraulic butted joint is fixedly connected with the lower platform of the butted joint device. One end of the sliding platform base is fixedly connected with a
hydraulic cylinder piston rod, while the other end is fixedly connected with the convex hydraulic batted joint. A pair of the convex oil line plugs is embedded in the convex hydraulic butted joint, and a pair of the concave oil line plugs is embedded in the concave hydraulic butted joint. The
contact sensor is fixedly connected with the convex hydraulic butted joint. The butted joint device for the
underwater oil line has the advantages of compact structure, high reliability, simple butting process, and high operational efficiency. The butted joint device for the underwater oil line can be applied to underwater operations of the tie-back, the maintenance and the like of deep-sea oil-gas pipelines, and has wide application prospect.