Liquid rotating joint for single point mooring system

Abstract

The invention discloses a liquid rotating joint for a single point mooring system, which adopts a butterfly mode of a swing bearing. An inner ring is installed at the top of a bracket, two inlet pipes are arranged at the bottom of the bracket, an end cover is installed on the inner ring, and an outer ring is rotated around the inner ring and the end cover through a swing supporting bearing provided with a waterproof shield to from a matched sealing surface and an annular special-shaped hollow cavity; the outer wall of the outer ring is symmetrically provided with two holes communicated with the annular special-shaped hollow cavity, and each hole is connected with an outlet pipe; an L-shaped broken line type sealing form is adopted, a first ring and a second ring of the sealing surface are sand proof sealing rings and are connected with a sand sediment groove and a sand removing hole communicated with the sand sediment groove; and a third ring, a fourth ring and a fifth ring of the sealing surface are sealing rings and are connected with a leakage detection device, and a waterproof sealing ring is arranged on each joint surface adjacent to the outer side. A plurality of liquid rotating joints can be combined for utilization, and the bracket on the joint is connected with the end cover below the bracket; and the liquid rotating joints with different calibers can be singly combined or combined in an overlapping way. The liquid rotating joint for the single point mooring system has the advantages of reasonable structure, simpleness for installation and favorable sealing property and effectively solves the problem of wearing of sand grains on the inner ring, the outer ring and the side wall.

Description

technical field [0001] The invention relates to a liquid swivel joint used in the occasions of realizing economic exploitation such as offshore oil and gas field production and export terminals, and is especially suitable for a single-point mooring system. Background technique [0002] According to different sea areas and sea conditions, the main mooring methods used by offshore FPSO floating production and storage devices are single-point mooring system and multi-point mooring system. In the single point mooring system, the liquid swivel joint acts as a transfer station for fluid transmission between the submarine pipeline and the FPSO. The liquid rotary joint can not only ensure the fluid delivery under a certain temperature, pressure and flow rate, but also can freely rotate 360°; it can be used alone or stacked to form a channel group. [0003] Chinese patent ZL200720103290.8 is a rotary joint device. The sealing contact form of the liquid medium is a linear sealing typ...

AI Technical Summary

Problems solved by technology

[0006] The invention solves the technical problem of poor sealing effect existing in the existing liquid rotary joint, especially the inability to deal with sedimentation, and develops a liquid rotary joint that can eliminate sedimentation in the liquid and has a good sealing effect

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