Connecting joint for pressure-resisting body and framework of deep-sea platform

Abstract

The invention relates to a connecting joint for a pressure-resisting body and a framework of a deep-sea platform. The connecting joint comprises a framework, wherein a plurality of pressure-resistingshells are mounted inside the framework; and each pressure-resisting shell and the framework are connected through a displacement compensating joint, a movable joint and a fixed joint. The connectingjoint is compact and reasonable in structure, is convenient to operate, can realize function conversion between the movable joint and the fixed joint through the displacement compensating joint, can realize longitudinal free movement, in a diving process, of a pressure-resisting body, and also can bear longitudinal impact load with the fixed joint after diving to working depth.

Description

technical field [0001] The invention relates to the technical field of deep-sea platform auxiliary equipment, in particular to a connection joint between a pressure-resistant body and a frame of a deep-sea platform. Background technique [0002] The environment of the underwater world is harsh, and it is necessary to overcome the huge seawater pressure. To exploit marine resources, especially the deep sea development, it needs to rely on deep sea diving equipment to complete. At present, all major countries in the world have vigorously developed deep-sea manned platforms, and deep-sea manned platforms are gradually developing in the direction of large-scale and multi-functional. The new deep-sea manned platform should have the characteristics of large payload, long residence time on the seabed, and the ability to perform multi-functional operations. The above characteristics make the multi-body pressure-resistant structure a trend. Such as: the offshore multi-purpose submar...

AI Technical Summary

Problems solved by technology

However, the use of welding will bring the following disadvantages: the difference in longitudinal displacement of each pressure shell will inevitably cause bending deformation of the frame structure, increase the maximum principal stress, and easily cause fatigue damage; residual tensile stress is common in welded steel structures, increasing Possibility of fatigue damage; once visible fatigue cracks are generated, they will spread rapidly and cause damage to the connection part or frame structure; welding quality depends largely on the professional level of workers, and the quality is not easy to control

However, if the joint connection is used to change the pressure body and the frame structure from a full-circle connection to a multi-point connection, the structural stress at the connection point will increase locally.

[0007] The deep-sea platform with multiple pressure bodies is a new type of structure, and there are few relevant materials, and no relevant research has been found on the uncoordinated longitudinal deformation of multiple pressure bodies.

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