Righting device and righting system
By using the support base and elastic straightening components of the straightening device, the problem of riser damage under marine loads has been solved, thus achieving riser stability and FPSO platform safety, and extending service life.
Patent Information
- Application Number
- CN202522279558.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-28
AI Technical Summary
Under marine loads, the FPSO and riser experience multi-directional swaying, which makes the riser prone to damage and makes it difficult to ensure normal production operations.
The uprighting device includes a support base and an uprighting component. The support base has a through hole, and the uprighting component is partially installed in the through hole and abuts against the riser. The elastic uprighting component deforms axially to provide elastic support force. The automatic adjustment mechanism controls the circumferential rotation and axial movement of the uprighting component to reduce collision impact force.
Reduce wear and stress concentration between risers and straightening components, improve the operational safety and stability of risers and FPSO platforms, and extend their service life.
Smart Images
Figure CN224679453U_ABST
Abstract
Description
Technical Field
[0001] This disclosure belongs to the field of marine vessel design and construction technology, specifically relating to a righting device and righting system. Background Technology
[0002] FPSO (Floating Production Storage and Offloading) connects the subsea wellhead to the surface platform via risers. Under marine loads such as wind and wave currents, there will be multi-directional swaying motion between the FPSO and the riser. The riser is easily damaged due to swaying, which makes it difficult to ensure the normal production operation of the FPSO platform. Utility Model Content
[0003] The purpose of this application is to provide a straightening device and a straightening system that can reduce the risk of damage to risers due to shaking and reduce the impact force between the riser and the straightening components.
[0004] This disclosure provides a straightening device for straightening a riser located within the main structure of a support system. The straightening device includes: A support base is provided through the side periphery of the main structure of the support system, and a through hole is formed inside the support base, the axial direction of the through hole being parallel to the radial direction of the riser. The straightening component is partially installed inside the through hole and partially located outside the through hole and abutting against the riser; the end of the straightening component near the riser can elastically deform along the axial direction of the through hole to provide elastic support force to the riser.
[0005] In one exemplary embodiment of this disclosure, the straightening component includes: The straightening block is installed in the through hole and connected and fixed to the support base; An elastic straightening member is located between the straightening block and the riser, with one end connected to the straightening block and the other end abutting against the riser; the elastic straightening member is capable of elastic deformation along the axial direction of the through hole; The elastic straightening member has a contracted state in which it elastically shrinks when the riser is radially offset, and an initial state in which it recovers its deformation when the riser is not radially offset.
[0006] In one exemplary embodiment of this disclosure, the side of the elastic straightening member near the riser is in contact with the corresponding outer surface of the riser, and the side of the elastic straightening member near the riser is flexible.
[0007] In one exemplary embodiment of this disclosure, the through hole is a threaded hole, and the straightening component is threadedly connected to the support base through the through hole; The straightening component includes a protrusion located outside the through hole and disposed on the side of the support seat opposite to the riser. The straightening device includes an automatic adjustment mechanism, which is sleeved on the outer periphery of the protrusion to control the circumferential rotation of the straightening component and to move the straightening component along the axial direction of the through hole.
[0008] In an exemplary embodiment of this disclosure, a slot is provided on the outer side wall of the support base, and the straightening device includes a limiting member. The limiting member is installed on the side of the main structure of the support system away from the riser. The end of the limiting member near the support base is embedded in the slot, and the side of the limiting member near the support base is in contact with the bottom wall of the slot.
[0009] In one exemplary embodiment of this disclosure, the limiting member is U-shaped, the limiting member is disposed around a portion of the side periphery of the support base, and is at least able to support the bottom of the support base; the end of the limiting member near the support base can completely fill the slot; The straightening device includes a connector that passes through the limiting member and the side of the main structure of the support system away from the riser, for fixing the limiting member to the main structure of the support system.
[0010] In one exemplary embodiment of this disclosure, a fastener is provided on the support base. The fastener passes through the side periphery of the support base and is threadedly connected to the support base. The fastener can move radially along the through hole to abut against the straightening component or be spaced apart from the straightening component.
[0011] In an exemplary embodiment of this disclosure, the support base includes a first support portion and a second support portion connected to each other. The first support portion is located on the side of the second support portion away from the riser. The orthographic projection of the first support portion on the main structure of the support system is located within the orthographic projection of the second support portion on the main structure of the support system. When the second support portion is fully embedded in the main structure of the support system, the outer periphery of both the first support portion and the outer periphery of the second support portion are in contact with the main structure of the support system.
[0012] In an exemplary embodiment of this disclosure, two spaced-apart first receiving grooves are provided on the outer side wall of the straightening component. The two first receiving grooves are located at opposite ends of the straightening component. A first sealing member is provided in the first receiving groove. During the process of the straightening component moving axially along the through hole, the inner side of the first sealing member is connected to the straightening component, and the outer side of the first sealing member abuts against the inner side wall of the support base. A second receiving groove is provided on the outer periphery of the support base, and a second sealing element is provided in the second receiving groove. The outer side of the second sealing element abuts against the main structure of the support system.
[0013] This disclosure provides a straightening system, including a main support structure and at least one straightening device as described above, wherein the main support structure is sleeved on the outer periphery of the riser and spaced apart from the outer surface of the riser.
[0014] The technical solutions provided in this disclosure have at least the following advantages: This embodiment of the invention incorporates a straightening device. When the riser sways and bends laterally, exerting a thrust on the straightening assembly, the straightening assembly elastically contracts to buffer the impact force between the riser and the straightening assembly, thereby protecting the riser and the straightening assembly from damage or reducing the degree of damage. Upon recovery from deformation, the straightening assembly adaptively provides a straightening force to the riser based on its radial offset. The direction of the straightening force is opposite to the direction of the thrust exerted by the riser on the straightening assembly, thus straightening the riser towards its center position. This effectively resists the radial forces exerted on the riser by marine environmental factors, ensuring the riser maintains a stable center position in complex marine environments. This reduces wear and stress concentration between the riser and the straightening assembly, improves the safety and stability of the riser and FPSO platform operation, and extends the service life of the riser and FPSO platform.
[0015] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.
[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.
[0018] Figure 1 A cross-sectional structural schematic diagram of the straightening device installed on the main structure of the support system in an embodiment of this disclosure is shown.
[0019] Figure 2 It shows Figure 1 A magnified schematic diagram of a central straightening device.
[0020] Figure 3An enlarged structural schematic diagram of the support base in an embodiment of this disclosure is shown.
[0021] Figure 4 An enlarged schematic diagram of another uprighting device in an embodiment of this disclosure is shown.
[0022] Figure 5 An enlarged structural schematic diagram of the straightening component in an embodiment of this disclosure is shown.
[0023] Figure 6 A front view schematic diagram of the straightening device installed on the main structure of the support system is shown.
[0024] Figure 7 It shows Figure 1 A partially enlarged schematic diagram of the main structure of the central support system.
[0025] Figure 8 A three-dimensional structural diagram of the straightening system is shown.
[0026] Figure 9 A cross-sectional structural diagram is shown when the straightening device comes into contact with the riser.
[0027] Figure 10 It shows Figure 8 A cross-sectional structural diagram of the straightening system in the image.
[0028] Explanation of reference numerals in the attached figures: 10. Straightening device; 20. Straightening system; 30. Riser; 1. Main structure of support system; 11. Through hole; 12. Mounting groove; 2. Support base; 21. Through hole; 22. First support part; 23. Second support part; 24. Slot; 25. Second receiving groove; 26. Second sealing element; 3. Straightening assembly; 31. Straightening block; 32. Elastic straightening element; 33. Protrusion; 34. First receiving groove; 35. First sealing element; 4. Limiting element; 5. Connecting element; 6. Fastener. Detailed Implementation
[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.
[0030] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.
[0031] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present application, and should not be construed as limiting the present application.
[0032] like Figures 1 to 3 As shown, this disclosure provides a straightening device 10 for straightening a riser 30 located within the main structure 1 of a support system. The straightening device 10 may include a support base 2 and a straightening component 3. The support base 2 is disposed through the side periphery of the main structure 1 of the support system, and a through hole 21 is formed inside the support base 2. The axial direction of the through hole 21 is parallel to the radial direction of the riser 30. The straightening component 3 is partially installed inside the through hole 21 and partially located outside the through hole 21 and abuts against the riser 30 to provide radial straightening of the riser 30, ensuring that the riser 30 maintains a stable centered position in complex marine environments, improving the safety and stability of the riser 30 and the FPSO connected to the riser 30, and extending the service life of the riser 30 and the FPSO. In this embodiment, the end of the straightening component 3 near the riser 30 can undergo elastic deformation along the axial direction of the through hole 21 to provide elastic support force to the riser 30.
[0033] For example, such as Figure 4 As shown, the straightening assembly 3 may include a straightening block 31 and an elastic straightening member 32. The straightening block 31 is installed in the through hole 21 and is connected and fixed to the support base 2. The elastic straightening member 32 is located between the straightening block 31 and the riser 30, with one end connected to the straightening block 31 and the other end abutting against the riser 30. The elastic straightening member 32 is capable of elastic deformation along the axial direction of the through hole 21. The elastic straightening member 32 has a contracted state where it elastically shrinks when the riser 30 is radially offset, and an initial state where it recovers its deformation when the riser 30 is not radially offset.
[0034] When the riser 30 sways and bends laterally, generating thrust on the straightening assembly 3, the elastic straightening member 32 elastically contracts to buffer the impact force between the riser 30 and the straightening assembly 3, thereby protecting the riser 30 and the straightening assembly 3 from damage or reducing the degree of damage. Upon recovery of deformation, the elastic straightening member 32 adaptively provides a straightening force to the riser 30 according to the degree of radial offset. The direction of the straightening force is opposite to the direction of the thrust from the riser 30 to the straightening assembly 3, allowing the straightening assembly 3 to straighten the riser 30 towards the center position. This effectively resists the radial forces exerted on the riser 30 by marine environmental factors, ensuring that the riser 30 maintains a stable center position in complex marine environments. This reduces wear and stress concentration between the riser 30 and the straightening assembly 3, improves the safety and stability of the riser 30 and the FPSO platform, and extends the service life of the riser 30 and the FPSO platform.
[0035] In some embodiments, the shape of the side of the elastic straightener 32 near the riser 30 can be adapted to the shape of the corresponding outer surface of the riser 30, that is, the side of the elastic straightener 32 near the riser 30 can be completely fitted with the corresponding outer surface of the riser 30, thereby increasing the contact area between the elastic straightener 32 and the riser 30, reducing contact stress, and thus reducing damage to the outer wall of the riser 30.
[0036] In some embodiments, the side of the elastic straightener 32 near the riser 30 may be flexible to mitigate the problem of rigid abrasion damage to the riser 30 caused by the elastic straightener 32.
[0037] In some embodiments, the elastic straightening member 32 may include an elastic member and a flexible member. The opposite ends of the elastic member are connected to the flexible member and the straightening block 31, respectively. The elastic member is capable of elastic expansion and contraction along the axial direction of the through hole 21. The shape of the side of the flexible member near the riser 30 is adapted to the shape of the corresponding outer surface of the riser 30, and the flexible member is flexible to buffer the impact force between the riser 30 and the straightening assembly 3.
[0038] For example, the elastic element can be a spring. The flexible element can be made of a material with a certain degree of damping elasticity, such as rubber.
[0039] However, this is not the only option. In other embodiments, the elastic element and the flexible element can also be integrally formed, or the straightening block 31 and the elastic straightening element 32 can be integrally formed to simplify the manufacturing process of the straightening component 3.
[0040] For example, in some embodiments, when the elastic element and the flexible element are integrally formed, the elastic straightening element 32 can be an elastic diaphragm to reduce or avoid frictional wear between the elastic straightening element 32 and the riser 30. The elastic straightening element 32 can be connected to the end of the straightening block 31 near the riser 30 by means of bolts or the like, as detailed in the following reference. Figure 4As shown.
[0041] The thickness of the elastic straightening component 32 can be 12mm, and the elastic stroke can be 1mm-3mm.
[0042] The side of the elastic straightener 32 closest to the riser 30 can be adapted to the shape of the corresponding outer surface of the riser 30, so that it can fit completely against the outer surface of the riser 30. For example, when the riser 30 is a round tube, the outer diameter of the elastic straightener 32 can be 193 mm and the inner diameter can be 80 mm.
[0043] The flexible centralizer 32 can be made of 2205 duplex steel, which is resistant to seawater corrosion and can adapt to the salt spray and seawater environments of ships, reducing the tedious process of requiring regular maintenance. At the same time, the yield strength of the flexible centralizer 32 is ≥450MPa, balancing strength and elasticity, and can be adapted to a 50-ton load.
[0044] In some embodiments, the support base 2 may be made of high-strength corrosion-resistant steel to give the support base 2 good structural strength and resistance to marine corrosion.
[0045] In some embodiments, the through hole 21 is a threaded hole, and the straightening component 3 is threadedly connected to the support base 2 through the through hole 21.
[0046] Specifically, a thread that matches the threaded groove on the through hole 21 can be provided on the outer periphery of the straightening block 31 so that the straightening component 3 and the support base 2 can be threadedly connected through the straightening block 31.
[0047] The straightening block 31 can be made of wear-resistant and high-strength material to reduce the risk of damage caused by friction between the straightening block 31 and the support seat 2.
[0048] For example, the straightening block 31 can be made of abrasion-resistant rubber material.
[0049] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the straightening component 3 may include a protrusion 33 located outside the through hole 21 and disposed on the side of the support base 2 away from the riser 30.
[0050] The straightening device 10 may also include an automatic adjustment mechanism, which is sleeved on the outer periphery of the protrusion 33 to control the circumferential rotation of the straightening component 3, thereby adjusting the initial position and the magnitude of the straightening force of the straightening component 3.
[0051] Specifically, since the straightening component 3 is threadedly connected to the support base 2, the straightening component 3 can move axially along the through hole 21 under the drive of the automatic adjustment mechanism, thereby adjusting the distance between the straightening component 3 and the riser 30, and realizing the adjustment of the straightening force of the straightening component 3 on the riser 30. This embodiment of the present disclosure, by setting an automatic adjustment mechanism, can reduce or completely replace the work of divers to adjust the initial position of the straightening component 3. The position adjustment operation of the straightening component 3 is more convenient, and it reduces labor costs and the risks of manual operation.
[0052] The automatic adjustment mechanism in this embodiment allows for flexible adjustment of the initial position and the magnitude of the straightening force of the straightening component 3 according to actual working conditions, improving the adaptability and versatility of the device. It can meet the radial straightening requirements of risers 30 with different sea conditions and pipe diameters, and enhance the application capability of the device in complex marine oil extraction environments.
[0053] For example, when risers 30 of different sizes (such as diameter) are installed in the main structure 1 of the support system, the automatic adjustment mechanism can automatically adjust the distance by which the straightening component 3 moves axially along the through hole 21 according to the size of the riser 30, so that the straightening device 10 can adapt to the radial straightening requirements of risers 30 of different diameters.
[0054] For example, the protrusion 33 can be located on the side of the straightening block 31 away from the riser 30 and connected to the straightening block 31. The protrusion 33 can be configured as a hexagonal prism extending axially along the through hole 21 to increase the contact surface between the automatic adjustment mechanism and the protrusion 33, thereby improving the problem of slippage between the automatic adjustment mechanism and the surface of the protrusion 33 when controlling the circumferential rotation of the straightening assembly 3. The protrusion 33 can be integrally formed with the straightening block 31 to simplify the manufacturing process.
[0055] The automatic adjustment mechanism can be a hydraulic wrench. The automatic adjustment mechanism may include a rotating part sleeved around the outer periphery of the protrusion 33 and a housing hinged to the rotating part. When the automatic adjustment mechanism controls the circumferential rotation of the centering assembly 3, the hydraulic pump outputs pressure to drive the cylinder to generate thrust, which is then converted into torque output by the transmission component, thereby driving the centering assembly 3 to rotate circumferentially through the rotating part.
[0056] In this embodiment, the straightening device 10 can provide 300 tons of straightening force to the riser 30, but it is not limited to this. The straightening device 10 can be set according to different sea conditions and the radial straightening requirements of risers 30 with different diameters, so as to provide a corresponding amount of straightening force to the riser 30.
[0057] like Figure 1 and Figure 2As shown, in some embodiments, a slot 24 may be provided on the outer wall of the support base 2. The straightening device 10 may also include a limiting member 4, which is installed on the side of the main structure 1 of the support system away from the riser 30. The end of the limiting member 4 near the support base 2 is embedded in the slot 24, and the side of the limiting member 4 near the support base 2 is in contact with the bottom wall of the slot 24. In this embodiment of the present disclosure, by using the limiting member 4 to be in contact with the bottom wall of the slot 24, the support base 2 can be locked and fixed on the main structure 1 of the support system. This improves the problem of the axial displacement of the through hole 21 and the radial displacement of the riser 30 caused by the installation position displacement of the support base 2 on the main structure 1 of the support system, thereby facilitating the straightening component 3 to straighten the riser 30 towards the center position.
[0058] For example, such as Figure 6 As shown, in this embodiment, the limiting member 4 is arranged around a portion of the side periphery of the support base 2. The limiting member 4 can be U-shaped to facilitate the assembly and disassembly of the limiting member 4 and the support base 2. The limiting member 4 can at least support the bottom of the support base 2, that is, the limiting member 4 can at least abut against the bottom of the support base 2, thereby improving the problem of positional displacement of the support base 2 under the action of gravity, and causing axial displacement of the through hole 21 and radial displacement of the riser 30.
[0059] However, it is not limited to this. The limiting member 4 can also be in other shapes besides U-shape that are easy to install and remove and can be used to limit the support 2. The specific shape can be set according to the actual situation.
[0060] In some embodiments, the end of the limiting member 4 near the support base 2 can completely fill the slot 24. After the limiting member 4 is embedded in the slot 24, the limiting member 4 can restrict the support base 2 from moving axially in the through hole 21 and can restrict the circumferential rotation of the through hole 21 of the support base 2, thereby ensuring the stability of the position of the straightening component 3 and providing radial straightening force to the riser 30.
[0061] However, this is not the only option. In other embodiments, the slot 24 may be slightly larger than the end of the limiting member 4 that is close to the support base 2, so as to reduce the difficulty of aligning and installing the limiting member 4 and the slot 24.
[0062] like Figure 1 and Figure 6 As shown, in some embodiments, the straightening device 10 may include a connector 5, which is disposed through the limiting member 4 and the side of the main structure 1 of the support system away from the riser 30, so as to fix the limiting member 4 to the main structure 1 of the support system.
[0063] For example, the connector 5 may include a bolt and a nut. The bolt passes through the limiting member 4 and the side of the main structure 1 of the support system opposite to the riser 30. The nut is threaded to the bolt and pressed onto the side of the limiting member 4 opposite to the main structure 1 of the support system. However, it is not limited to this. The connector 5 may also be any other structure besides a bolt and nut that allows the limiting member 4 to be detachably installed on the main structure 1 of the support system. The specific design can be determined according to the actual situation.
[0064] In this embodiment of the disclosure, the straightening device 10 may include one or more connecting members 5.
[0065] For example, when the limiting member 4 is U-shaped, four connecting members 5 can be provided to fix the limiting member 4 to the main structure 1 of the support system. The four connecting members 5 can be evenly spaced on the limiting member 4 to enhance the stability of the connection between the limiting member 4 and the main structure 1 of the support system and improve the limiting effect between the limiting member 4 and the support seat 2.
[0066] In some embodiments, fasteners 6 may be provided on the support base 2, such as... Figure 1 , Figure 2 and Figure 6 As shown, the fastener 6 passes through the side circumference of the support base 2 and is threadedly connected to the support base 2. The fastener 6 can move radially along the through hole 21 to achieve contact with the straightening component 3 or to be spaced apart from the straightening component 3.
[0067] Specifically, the fastener 6 can be positioned at the end of the support base 2 away from the riser 30. When the position of the straightening component 3 on the support base 2 needs to be adjusted, the fastener 6 can be rotated to space it from the straightening component 3. After the position of the straightening component 3 on the support base 2 is adjusted, the fastener 6 can be rotated to make it abut against the straightening component 3, thereby improving the problem of the straightening component 3 moving relative to the support base 2 (e.g., the straightening component 3 moving axially or rotating circumferentially relative to the support base 2 along the through hole 21).
[0068] like Figure 3 As shown, in some embodiments, the support base 2 may include a first support portion 22 and a second support portion 23 connected to each other. The first support portion 22 is located on the side of the second support portion 23 away from the riser 30. The orthographic projection of the first support portion 22 on the main structure 1 of the support system is located within the orthographic projection of the second support portion 23 on the main structure 1 of the support system. That is, the support base 2 is trapezoidal.
[0069] like Figure 2As shown, the shape and size of the through hole 11 on the main structure 1 of the support system for accommodating the support seat 2 are adapted to the shape and size of the support seat 2. When the second support part 23 is fully embedded in the main structure 1 of the support system, the outer periphery of the first support part 22 and the outer periphery of the second support part 23 can fit with the main structure 1 of the support system, thereby strengthening the connection stability between the support seat 2 and the main structure 1 of the support system and improving the situation where the support seat 2 is relatively displaced relative to the main structure 1 of the support system.
[0070] When installing the support base 2 onto the main structure 1 of the support system, the support base 2 can be installed through the main structure 1 from the inner wall to the outer wall. The cross-sectional area of the through hole 11 on the main structure 1 for accommodating the support base 2 on the side near the riser 30 is larger than that of the first support part 22, thereby reducing the difficulty of alignment between the support base 2 and the through hole 11. Since the cross-section of the end of the through hole 11 away from the riser 30 is smaller than that of the second support part 23, when the side of the first support part 22 away from the riser 30 abuts against the main structure 1 of the support system, the through hole 11 can restrict the support base 2 from continuing to move in the direction away from the riser 30, thereby improving the problem of the support base 2 falling off the main structure 1 of the support system. For details, please refer to [reference needed]. Figure 1 , 3 As shown in Figures 7 and 8.
[0071] like Figure 2 and 5 As shown, in some embodiments, two spaced-apart first receiving grooves 34 can be formed on the outer side wall of the straightening component 3, with the two first receiving grooves 34 located at opposite ends of the straightening component 3. A first sealing element 35 is provided within the first receiving groove 34. During the axial movement of the straightening component 3 along the through hole 21, the inner side of the first sealing element 35 connects with the straightening component 3, and the outer side of the first sealing element 35 abuts against the inner side wall of the support base 2. This enhances the sealing between the straightening component 3 and the support base 2, improving the problem of water and impurities entering between the straightening component 3 and the support base 2 and causing contamination, thereby extending the service life of the straightening component 3 and the support base 2.
[0072] Furthermore, the first receiving groove 34 and the first sealing member 35 can both be arranged around the outer side wall of the straightening component 3 to further enhance the sealing between the straightening component 3 and the support base 2.
[0073] However, this is not the only option. In other embodiments, one or more first receiving grooves 34 may be provided on the outer side wall of the straightening component 3, depending on the actual situation.
[0074] like Figure 2 and Figure 3As shown, in some embodiments, a second receiving groove 25 can be formed on the outer peripheral side of the support base 2. A second sealing member 26 is provided in the second receiving groove 25. The outer side of the second sealing member 26 abuts against the main structure 1 of the support system, thereby enhancing the sealing between the support base 2 and the main structure 1 of the support system, improving the problem of water and impurities entering between the support base 2 and the main structure 1 of the support system and causing pollution to the support base 2 and the main structure 1 of the support system, and thus extending the service life of the support base 2 and the main structure 1 of the support system.
[0075] In this embodiment, one or more second receiving slots 25 may be opened on the outer periphery of the support base 2, which can be determined according to the actual situation.
[0076] Furthermore, the second receiving groove 25 and the second sealing member 26 can both be arranged around the outer side wall of the straightening component 3 to further enhance the sealing between the support base 2 and the main structure 1 of the support system.
[0077] like Figures 8 to 10 As shown, this disclosure provides a straightening system 20, which may include a support system main structure 1 and at least one of the above-mentioned straightening devices 10. The support system main structure 1 is sleeved on the outer periphery of the riser 30 and spaced apart from the outer surface of the riser 30.
[0078] For example, the main structure 1 of the support system can be a ring structure.
[0079] The support base 2 is installed through the main structure 1 of the support system. The straightening component 3 is installed in the through hole 21 and abuts against the riser 30. The straightening component 3 can adaptively provide a straightening force to the riser 30 according to the radial offset of the riser 30, so as to straighten the riser 30 towards the center position.
[0080] For example, when the straightening system 20 includes multiple straightening devices 10 (e.g., eight), these devices can be evenly spaced along the circumference of the main support structure 1 to provide straightening force to the riser 30 from multiple directions (or all directions), reducing the risk of damage caused by radial displacement of the riser 30, and thus effectively ensuring the normal production operation of the FPSO platform. When the riser 30 is radially displaced, the straightening device 10 corresponding to the direction of displacement can provide radial straightening force to the riser 30, while other straightening devices 10 can also limit excessive displacement of the riser 30, maintaining its stability.
[0081] like Figure 1 and Figure 7As shown, in some embodiments, an installation groove 12 can be opened on the side of the main structure 1 of the support system away from the riser 30. When the limiting member 4 is installed on the main structure 1 of the support system, the limiting member 4 is at least partially embedded in the installation groove 12, thereby reducing the overall space occupied by the straightening system 20.
[0082] Furthermore, the end of the limiting member 4 near the riser 30 can be completely filled with the mounting groove 12, thereby strengthening the stability of the connection between the limiting member 4 and the main structure 1 of the support system through the mounting groove 12, and improving the problem of relative displacement or even separation between the limiting member 4 and the main structure 1 of the support system.
[0083] In some embodiments, the underwater corrosion problem of the straightening system 20 can be improved by paint or other special coatings or materials.
[0084] In addition, sacrificial anode protection and cathodic protection devices can be installed on the centralization system 20. The sacrificial anode protection and cathodic protection devices are connected to the current protection system of the FPSO main ship structure through metal conduction, so as to play the role of cathodic protection and corrosion prevention, thereby meeting the design requirements of extending service life.
[0085] In this embodiment, the installation process between the straightening device 10 and the main structure 1 of the support system can be as follows: First, the support base 2 is inserted through the main structure 1 of the support system, and the support base 2 is securely installed on the main structure 1 of the support system using the limiting member 4 and the connecting member 5 to limit and straighten the support base 2, ensuring that the axial direction of the through hole 21 coincides with the radial direction of the riser 30. Next, the straightening component 3 is embedded in the through hole 21 of the support base 2, and the straightening component 3 is threadedly connected to the inner wall of the support base 2. At this time, part of the straightening component 3 is located outside the through hole 21 to abut against the riser 30. Finally, the automatic adjustment mechanism is sleeved on the outer periphery of the protrusion 33, and the automatic adjustment mechanism controls the circumferential rotation of the straightening component 3 to adjust the initial straightening position of the straightening component 3 and the straightening force on the riser 30 according to different working conditions. After adjusting the initial position of the straightening component 3, screw the fastener 6 into the side wall of the support base 2 and make the fastener 6 abut against the straightening component 3 to restrict the movement of the straightening component 3 relative to the support base 2.
[0086] After the installation of the straightening device 10 and the main structure 1 of the support system is completed, the straightening system 20 can be adjusted according to factors such as the pipe diameter of the riser 30 and the expected marine environmental forces. Specifically, after the initial adjustment of the position of the straightening component 3, if the straightening force of the straightening component 3 on the riser 30 is insufficient to straighten the riser 30 to the center position, the fastener 6 can be rotated and separated from the straightening component 3. Then, the straightening component 3 can be rotated circumferentially by the automatic adjustment mechanism to further adjust the initial distance between the straightening component 3 and the riser 30, so that the straightening component 3 reaches a suitable pre-compression amount and the straightening force of the straightening component 3 on the riser 30 is sufficient to straighten the riser 30 to the center position.
[0087] When using the straightening system 20, it can be inspected and maintained regularly, observing the wear condition, elasticity, and tightness of the automatic adjustment mechanism of the straightening component 3. If the straightening component 3 is found to be severely worn, it can be replaced in a timely manner. If the elasticity of the straightening component 3 is found to be weakened, the initial straightening force of the straightening component 3 on both ends can be readjusted through the adjustment mechanism to ensure that the straightening system 20 is always in good working condition and continuously provides a stable and reliable radial straightening function for the riser 30.
[0088] In the description of this specification, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0089] Furthermore, it should be noted that terms such as "upper," "lower," "left," and "right" are used only for distinction and convenience of description, and do not impose any positional limitations on the embodiments of the present invention. For example, "upper" in practice can refer to "lower," "left," or "right." In this disclosure, unless otherwise explicitly specified and limited, terms such as "assembly" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this disclosure can be understood according to the specific circumstances.
[0090] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0091] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.
Claims
1. A straightening device, characterized in that, The straightening device is used to straighten risers located within the main structure of the support system, and includes: A support base is provided through the side periphery of the main structure of the support system, and a through hole is formed inside the support base, the axial direction of the through hole being parallel to the radial direction of the riser. The straightening component is partially installed inside the through hole and partially located outside the through hole and abutting against the riser; the end of the straightening component near the riser can elastically deform along the axial direction of the through hole to provide elastic support force to the riser.
2. The straightening device according to claim 1, characterized in that, The straightening component includes: The straightening block is installed in the through hole and connected and fixed to the support base; An elastic straightening member is located between the straightening block and the riser, with one end connected to the straightening block and the other end abutting against the riser; the elastic straightening member is capable of elastic deformation along the axial direction of the through hole; The elastic straightening member has a contracted state in which it elastically shrinks when the riser is radially offset, and an initial state in which it recovers its deformation when the riser is not radially offset.
3. The straightening device according to claim 2, characterized in that, The side of the elastic straightening member closest to the riser is in contact with the corresponding outer surface of the riser, and the side of the elastic straightening member closest to the riser is flexible.
4. The straightening device according to claim 1, characterized in that, The through hole is a threaded hole, and the straightening component is threadedly connected to the support base through the through hole; The straightening component includes a protrusion located outside the through hole and disposed on the side of the support seat opposite to the riser. The straightening device includes an automatic adjustment mechanism, which is sleeved on the outer periphery of the protrusion to control the circumferential rotation of the straightening component and to move the straightening component along the axial direction of the through hole.
5. The straightening device according to claim 1, characterized in that, A slot is provided on the outer side wall of the support base. The straightening device includes a limiting member. The limiting member is installed on the side of the main structure of the support system away from the riser. The end of the limiting member near the support base is embedded in the slot, and the side of the limiting member near the support base is in contact with the bottom wall of the slot.
6. The straightening device according to claim 5, characterized in that, The limiting member is U-shaped and is arranged around a portion of the side periphery of the support base, and can at least support the bottom of the support base; the end of the limiting member near the support base can completely fill the slot. The straightening device includes a connector that passes through the limiting member and the side of the main structure of the support system away from the riser, for fixing the limiting member to the main structure of the support system.
7. The straightening device according to claim 1, characterized in that, The support base is provided with a fastener, which passes through the side periphery of the support base and is threadedly connected to the support base. The fastener can move radially along the through hole to abut against the straightening component or be spaced apart from the straightening component.
8. The straightening device according to claim 1, characterized in that, The support base includes a first support part and a second support part connected to each other. The first support part is located on the side of the second support part away from the riser. The orthographic projection of the first support part on the main structure of the support system is located within the orthographic projection of the second support part on the main structure of the support system. When the second support is fully embedded in the main structure of the support system, the outer periphery of both the first support and the second support are in contact with the main structure of the support system.
9. The straightening device according to claim 1, characterized in that, The straightening component has two spaced-apart first receiving grooves on its outer side wall. The two first receiving grooves are located at opposite ends of the straightening component. A first sealing element is provided in the first receiving groove. During the process of the straightening component moving axially along the through hole, the inner side of the first sealing element is connected to the straightening component, and the outer side of the first sealing element abuts against the inner side wall of the support base. A second receiving groove is provided on the outer periphery of the support base, and a second sealing element is provided in the second receiving groove. The outer side of the second sealing element abuts against the main structure of the support system.
10. A system for correcting posture, characterized in that, It includes a main support system structure and at least one straightening device as described in any one of claims 1 to 9, wherein the main support system structure is sleeved on the outer periphery of the riser and spaced apart from the outer surface of the riser.