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Marine Riser External Corrosion Fatigue Test Device

A fatigue test and external corrosion technology, applied in measuring devices, weather resistance/light resistance/corrosion resistance, test wear resistance, etc., can solve the problems of single structure function, complex loading mechanism, complicated and expensive equipment, etc. , the principle is simple, the effect of simple equipment

Active Publication Date: 2018-12-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The structure and function are single and not targeted. For example, the application number is CN201511017572.1 "Experimental device for cyclic tension and compression alternate loads"
[0004] 2. The equipment is huge and the loading mechanism is complicated. For example, the application number is CN201420100852.3 "A Fatigue Corrosion Test and Analysis Device for Mechanical Connectors". This device needs to be fatigue loaded by a computer, and the equipment is too complicated and expensive

Method used

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  • Marine Riser External Corrosion Fatigue Test Device
  • Marine Riser External Corrosion Fatigue Test Device
  • Marine Riser External Corrosion Fatigue Test Device

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, the specific embodiment of the present invention will be further described:

[0019] 1) if figure 1 As shown, the corrosion profile surveying and mapping device mainly includes: bending fatigue loading mechanism (1-2, 5-7, 22-30), tension and compression fatigue loading mechanism (3-4, 11-21), PVC corrosion water tank (8), Rubber gasket (10), test fitting (9). The whole device can be fixed on the ground through the supporting mechanism (3,7,11,21,22).

[0020] 2) if figure 1 Shown, PVC corrosion water tank (8) is used for storing corrosive liquid, for avoiding the influence of introducing other ions, so adopt PVC plastic box. The opening on the box wall is sealed by a rubber gasket (10). figure 2 A schematic diagram of the mechanism details after removing the water tank is given. According to the needs of the test can be used separately image 3 The vortex induced vibration fatigue loading mechanism and Figure 4 T...

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Abstract

The invention relates to a fatigue test device for marine riser external corrosion. The device comprises a bending fatigue loading mechanism, a compression-resistant fatigue loading mechanism and a corrosive water tank (8). A test pipe (9) penetrates through holes and is connected with the corrosive water tank (8) through rubber gaskets (10) in a sealed mode; the bending fatigue loading mechanism comprises a beam (1), Y-type lifting lugs (2) fixed to the two ends of the beam (1), U-type fixing supports (7), a Y-type fixing support (22), a bending moment lever (24), a load guiding plate (25), a cam (26), a bending moment motor (27), a spring support (28) and a bending moment spring (30); the compression-resistant fatigue loading mechanism comprises a fixing support (3) used for fixing one end of the test pipe (9), a pulling and pressing spring (12) connected with the other end of the test pipe (9), a spring lifting lug (13), a pulling and pressing lever (15), a pulling and pressing motor (16), a load guiding plate (18), a cam (19) and a pulling and pressing fixing support (21). The fatigue test device can achieve vortex-induced vibration load simulation and wave circulating tension load simulation, and can achieve a fatigue corrosive test for a riser in combination with the joint action of corroding media.

Description

technical field [0001] The invention relates to a laboratory test device for fatigue and external corrosion of marine risers, which can simulate the stress of marine risers under vortex-induced vibration and wave loads, and can simulate the stress of marine risers in combination with external corrosive media. Fatigue corrosion, this device is suitable for laboratory simulation of fatigue corrosion caused by the external fatigue load (alternating tensile stress caused by vortex induced vibration and buoyancy) and seawater on the outer surface of small-sized thin-walled risers. Background technique [0002] Corrosion exists widely in metal materials. For steel machinery equipment and oil and gas pipelines exposed to corrosive environments for a long time, corrosion has undoubtedly become the most important factor for structural failure. For marine risers, due to the action of waves and currents, the riser will often be subjected to cyclic loads during service, coupled with the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/32G01N3/56G01N17/00
CPCG01N3/32G01N3/56G01N17/006G01N2203/0026G01N2203/0073G01N2203/024G01N2203/0274
Inventor 余建星王华昆余杨樊志远刘晓强刘杰
Owner TIANJIN UNIV
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