Underwater pipe fitting butting device having direct butting and adjustment functions

Abstract

The invention provides an underwater pipe fitting butting device having direct butting and adjustment functions. The underwater pipe fitting butting device consists of a splay-shaped guiding primary locating device, a primary locating and limiting structure and an adjustable pry bank; the splay-shaped guiding primary locating device is arranged at the front end of a valve bank pry; and the primary locating and limiting structure is arranged on a submarine straight pipe section. With the adoption of the structural form, primary locating is carried out through the splay-shaped guiding primary locating device at the front end of the valve bank pry and limiting structures arranged on the straight pipe section in advance; after the valve bank pry sits on the bottom, the valve bank in the valve bank pry can be leveled high and low and adjusted longitudinally and transversely, so that a ball flange in the valve bank pry is precisely connected with a rotating flange of submarine straight pipe section, and the situation that an underwater butting system has the direct butting and adjustment functions is realized.

Description

Technical field [0001] The invention relates to the technical field of underwater pipe fittings, and in particular to an underwater pipe fittings butting device with direct docking and adjustment functions. Background technique [0002] At present, the riser or subsea manifold skid and the straight pipe section of the submarine pipeline are installed through expansion bends or short joints for auxiliary butt installation. The divers measure various relative spatial positions and orientations such as the distance, angle, and height difference between the flange at the bottom of the riser and the flange of the submarine flat pipe; the on-site construction personnel calculate the loft on the deck of the construction ship based on these data, and predict the expansion bend Or short section; divers enter the water for expansion bend or short section installation. Due to underwater measurement errors, expansion bend prefabrication process errors, butt-connected risers, flat pipe flang...

AI Technical Summary

Problems solved by technology

Due to underwater measurement errors, expansion bend prefabrication process errors, and displacement of flat pipe flanges after docking the riser, there may be repeated operations in expansion bend measurement, expansion bend prefabrication, and installation; underwater expansion bend installation requires Connect flanges at both ends of the water, requiring high installation accuracy

At present, there are the following disadvantages in the installation of submarine flat pipe sections and risers: it does not have the function of direct installation of submarine flat pipe sections, and does not have the adjustment function. Only expansion bends or pup joints can be used to realize the docking of risers or underwater manifold skids with straight pipe sections of sea pipes. Therefore, the difficulty, time and cost of offshore installation are virtually increased

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