Fpso external anti-corrosion device

Abstract

An FPSO external anti-corrosion device includes a hull; support arms; composite cables; and auxiliary anodes. At least two of the support arms are provided on one side of the hull. The ends of the support arms extend away from the hull. The ends of the support arms are connected to the composite cables. The composite cables are tensioned by the support arms. The auxiliary anodes are arranged on the composite cables. The FPSO external anti-corrosion device provides auxiliary anodes outside a hull via support arms, solving the problem of underwater anti-corrosion for FPSOs. A protective current is adjustable, offering a wider range of applications. The external installation of auxiliary anodes does not affect the hull's structure, ensuring the stability and reliability of the hull structure. The FPSO external anti-corrosion device is suitable for existing FPSOs, and the external anti-corrosion structure is implemented with minimal modifications to the original hull structure.

1 . An FPSO external anti-corrosion device, comprising: a hull; support arms; composite cables; and auxiliary anodes, wherein at least two of the support arms are provided on one side of the hull, ends of the support arms extending away from the hull, the ends of the support arms-being connected to the composite cables, the composite cables being tensioned by the support arms, and the auxiliary anodes-being arranged on the composite cables. 
     
     
         2 . The FPSO external anti-corrosion device according to  claim 1 , further comprising a lifting device, wherein the lifting device includes a winch, a lifting platform, steel cables, and rails, the winch being installed on the hull, the winch being connected to the lifting platform via the steel cables, the lifting platform being arranged on the rails, the rails being vertically arranged on an outer side of the hull, and the support arms being fixed on the lifting platform. 
     
     
         3 . The FPSO external anti-corrosion device according to  claim 1 , further comprising a lifting device, wherein the lifting device includes a motor and a reducer, the motor-being installed on the hull and connected to the support arms via the reducer, and a winch being able to drive the support arms to rotate through the reducer, causing the composite cables to rotate to a top of the hull. 
     
     
         4 . The FPSO external anti-corrosion device according to  claim 1 , further comprising a lifting device, wherein the lifting device includes a winch and steel cables, the winch being installed on the hull and connected to the ends of the support arms via the steel cables, the support arms being hinged to a side of the hull, and the winch being able to lift the support arms via the steel cables. 
     
     
         5 . The FPSO external anti-corrosion device according to  claim 1 , wherein the support arms are hinged to a side of the hull via installation shafts, axes of the installation shafts being perpendicular to a horizontal plane, the installation shafts being connected to a driving structure, and the driving structure being used to drive the installation shafts to rotate. 
     
     
         6 . The FPSO external anti-corrosion device according to  claim 1 , wherein the support arms are hinged to a side of the hull via installation shafts, axes of the installation shafts being parallel to a bow-and-stern line of the hull, the installation shafts being connected to a driving structure, and the driving structure being used to drive the installation shafts to rotate. 
     
     
         7 . The FPSO external anti-corrosion device according to  claim 1 , wherein the support arms are hydraulic telescopic arms or electric telescopic arms, the support arms being installed on a side of the hull and located below a water surface, and the support arms being parallel to a horizontal plane. 
     
     
         8 . The FPSO external anti-corrosion device according to  claim 1 , wherein the support arms are hydraulic telescopic arms or electric telescopic arms, the support arms being installed on the hull, the support arms extending obliquely downward, with a support member provided between the support arms and a side of the hull, and the ends of the support arms extending below a water surface. 
     
     
         9 . The FPSO external anti-corrosion device according to  claim 1 , wherein the ends of the support arms are provided with tensioning devices, the tensioning devices being able to tension the composite cables.