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Ocean platform wall thickness gradient casting joint and preparation method thereof

An offshore platform and node technology, applied in the field of offshore platform equipment, can solve problems such as high stress of welded joints, endangering platform safety, node damage, etc., and achieves uniform shrinkage stress, stable filling process, and favorable effects of slag discharge

Active Publication Date: 2021-09-24
中信金属股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The internal stress of welded joints is high, and the problem of cold and brittle at low temperature is serious. Stress concentration is prone to occur under the action of external force, leading to joint damage and endangering the safety of the platform.

Method used

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  • Ocean platform wall thickness gradient casting joint and preparation method thereof
  • Ocean platform wall thickness gradient casting joint and preparation method thereof
  • Ocean platform wall thickness gradient casting joint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A casting node with gradual wall thickness on an offshore platform, comprising a main body for connecting steel structure pipes, the main body is a cast steel node cast integrally, the main body includes a main body for connecting steel structure pipe fittings, and the main body is integral Cast steel, the main body includes a central connecting pipe, 2 inclined pipes, and 2 bottom pipes; the connecting ends of the central connecting pipe, inclined pipes and bottom pipes are intersected in one place to form a node core area, and all connecting pipes The central axis of the joint intersects at two center points in the core area of ​​the node, and the distance between the two center points is 250mm, and a circular arc transition is set between the inner and outer wall surfaces of two adjacent connecting pipes. The new casting node with gradual wall thickness has a gradual wall thickness at the upper part and a uniform wall thickness at the lower part; the minimum wall thic...

Embodiment 2

[0024] A casting node with gradual wall thickness on an offshore platform, comprising a main body for connecting steel structure pipes, the main body is a cast steel node cast integrally, the main body includes a main body for connecting steel structure pipe fittings, and the main body is integral Cast steel, the main body includes a central connecting pipe, 2 inclined pipes, and 2 bottom pipes; the connecting ends of the central connecting pipe, inclined pipes and bottom pipes are intersected in one place to form a node core area, and all connecting pipes The central axis of the joint intersects at two center points in the core area of ​​the node, and the distance between the two center points is 300mm, and a circular arc transition is set between the inner and outer wall surfaces of two adjacent connecting pipes.

[0025] The new casting node with gradual wall thickness has a gradual wall thickness at the upper part and a uniform wall thickness at the lower part; the minimum ...

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Abstract

The invention discloses an ocean platform wall thickness gradient casting joint. The casting joint comprises a main body used for being connected with steel structure pipe fittings, wherein the main body is integrally cast steel, the main body comprises a center connecting pipe, 2-4 inclined pipes and 2-6 bottom pipes, the connecting ends of the central connecting pipe, the inclined pipes and the bottom pipes are intersected and converged at one position to form a joint core area, the central axes of all the connecting pipe fittings are intersected at two central points in the joint core area, the distance between the two central points is 250-300 mm, and a fillet is arranged between the surfaces of the inner wall and the outer wall of every two adjacent connecting pipes for transition. According to the casting joint, the overall weight is reduced, and meanwhile good welding performance is guaranteed; and the casting joint can be formed at a time, the process is simpler, and the manufacturing cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of offshore platform equipment, in particular to a corrosion-resistant high-strength and high-toughness casting node in a low-temperature environment. Background technique [0002] Ocean platforms are the basis for human ocean development, and nodes are a key component of ocean platforms. The main function of the node is to connect the key and bear the load. Since the stress state of the node is relatively complex, it is easy to produce stress concentration, which leads to the appearance of cracks, and may further expand to cause structural failure and serious accidents. Therefore, in addition to satisfying the overall mechanical strength of the platform structure, the node design also needs to satisfy the local strength of each component intersecting the node, including structural strength, static strength and fatigue strength, so as to ensure the safety of the platform. The internal stress of the welded joint is hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B17/00C21D1/18C21D9/08
CPCE02B17/00E02B17/0004C21D1/18C21D9/085C21D2211/009C21D2211/001C21D2211/005
Inventor 刘中柱代保华陈湘茹郭爱民田俊敏翟启杰陈杨珉
Owner 中信金属股份有限公司
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