Acceptance devices and methods for the riser suspension structure of floating oil storage platforms

Abstract

This invention provides an acceptance device and method for the riser suspension structure of a floating oil storage platform. The device includes a base plate, a limiting frame, a mounting frame, and a riser. The limiting frame is located on the base plate, and the riser moves to the base plate within the area enclosed by the limiting frame. The mounting frame moves onto the riser suspension structure and is limited in position with it. The mounting frame and the riser suspension structure move and are confined to the limiting frame, with the riser suspension structure positioned above the riser. The riser suspension structure includes a suspension cylinder and multiple locking devices located around the suspension cylinder. The riser moves towards the interior of the suspension cylinder. After the riser extends into the suspension cylinder, the multiple locking devices lock the riser, confining it to the suspension cylinder, thus verifying whether the locking devices can engage. This invention provides a dedicated device and method for accepting riser suspension structures, addressing the current lack of such devices and methods on the market.

Description

Technical Field

[0001] This invention relates to the field of offshore platform technology, and in particular to an acceptance device and method for the riser suspension structure of a floating oil storage platform. Background Technology

[0002] Floating oil storage platforms are located at sea and can extract and store substances such as oil, natural gas, and methane from the seabed, serving as platforms for the development of marine mineral resources.

[0003] A floating oil storage platform includes a float, a support plate, and a riser suspension structure. The float is used to move and support the support plate and riser suspension structure. The support plate extends horizontally and is fixedly connected to the float. Storage devices, cranes, and other equipment are mounted on the support plate. The riser suspension structure is located below the support plate and is positioned to interlock with the riser of the subsea crude oil pipeline, facilitating the transfer of marine crude oil into the storage device via the riser suspension structure.

[0004] Currently, after the riser suspension structure is manufactured, there is no dedicated acceptance device to verify whether the riser suspension structure can operate safely and reliably, nor can it verify whether the dimensional parameters related to the riser suspension structure and riser engagement meet the standards. Summary of the Invention

[0005] The purpose of this application is to provide an acceptance device and method specifically for accepting the riser suspension structure of a floating oil storage platform.

[0006] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0007] According to one aspect of this application, this application provides an acceptance method for a riser suspension structure of a floating oil storage platform, comprising an acceptance device for the riser suspension structure of the floating oil storage platform. The acceptance device includes a base plate, a limiting frame, a mounting frame, and a riser, for accepting the riser suspension structure. The method includes the following steps: the limiting frame is located on the base plate; the riser is moved to the base plate within the area enclosed by the limiting frame; the mounting frame is moved onto the riser suspension structure and limited to it; the mounting frame and the riser suspension structure are moved and limited to the limiting frame, with the riser suspension structure located above the riser; the riser suspension structure includes a suspension cylinder and a plurality of locking locks located around the suspension cylinder; the riser moves toward the interior of the suspension cylinder; after the riser extends into the suspension cylinder, the plurality of locking locks lock the riser to limit it to the suspension cylinder, thereby verifying whether the plurality of locking locks can be engaged.

[0008] In some embodiments, the inner peripheral wall of the suspension cylinder is also coated with a paint layer; the riser is raised in the suspension cylinder to separate from the locking mechanism, and then multiple locking mechanisms are unlocked, so that the riser moves downward to the base plate; observe whether the paint layer on the inner peripheral wall of the suspension cylinder is scratched to determine whether there is a gap between the outer peripheral wall of the riser and the inner peripheral wall of the suspension cylinder, thereby determining whether the dimensional accuracy of the riser suspension structure is qualified.

[0009] In some embodiments, after the riser moves away from the riser suspension structure to the base plate, the mounting bracket and the riser suspension structure rotate to the base plate outside the limiting frame body to separate the mounting bracket for subsequent acceptance of the riser suspension structure.

[0010] In some embodiments, as the riser moves toward the suspension cylinder, the axis of the suspension cylinder is coaxial with the axis of the riser.

[0011] An acceptance device for a riser suspension structure of a floating oil storage platform, the riser suspension structure including a suspension cylinder and multiple locking devices disposed on the suspension cylinder, is used to accept the riser suspension structure using any of the above acceptance methods. The acceptance device includes: a limiting platform, a riser, and an installation frame. The limiting platform includes a base plate and a limiting frame, the base plate extending horizontally, the limiting frame disposed on the base plate, and the limiting frame extending circumferentially to enclose a working space. Multiple first limiting structures are disposed on the upper surface of the limiting frame. The riser is detachably disposed on the base plate, the riser is located within the working space, and locking devices are disposed around the periphery of the riser. A matching locking ring extends circumferentially along the riser; the mounting frame has multiple positioning structures, which are detachably connected to the end of the suspension cylinder; the mounting frame has multiple second limiting structures corresponding to the multiple first limiting structures on its periphery, and the second limiting structures can limit the mounting frame to the limiting platform, thereby placing the riser suspension structure above the riser; wherein the riser can move toward the interior of the suspension cylinder so that the locking lock engages with the locking ring, and there is a gap between the outer peripheral wall of the riser and the inner peripheral wall of the suspension cylinder.

[0012] In some embodiments, the mounting bracket includes two positioning ribs that extend horizontally and are provided with a second limiting structure at their ends; two connecting ribs are provided between the two positioning ribs and are respectively connected to the two positioning ribs at both ends; a reinforcing rib is also provided between one positioning rib and an adjacent connecting rib, and the two ends of the reinforcing rib are respectively connected to one positioning rib and an adjacent connecting rib.

[0013] In some embodiments, the distance between the two connecting ribs and the center of the positioning rib is the same in the spacing direction of the two connecting ribs; the plurality of positioning structures include a first group of positioning structures and a second group of positioning structures, the first group of positioning structures are respectively disposed at the intersection of the end of the connecting rib and the positioning rib, and the second group of positioning structures are respectively disposed at the center of the positioning rib and the connecting rib; the first group of positioning structures and the second group of positioning structures can respectively limit the vertical pipe suspension structure of different sizes.

[0014] In some embodiments, the mounting bracket further includes a plurality of mounting ears, which are respectively disposed on the positioning ribs.

[0015] In some embodiments, the limiting platform further includes a first operating corridor, a second operating corridor, and a ladder. The first operating corridor is disposed on the base plate and extends circumferentially around the limiting frame to enclose it. The first operating corridor is fixedly connected to the limiting frame. The second operating corridor is fixedly disposed above the first operating corridor and extends circumferentially around the limiting frame. An entrance / exit is provided on one side of the second operating corridor, allowing the riser dummy and the riser suspension structure to move horizontally and enter the workspace. The second operating corridor is fixedly connected to the limiting frame, and its upper surface is flush with the upper surface of the limiting frame. The ladder extends vertically and is fixedly connected to and communicates with the first and second operating corridors.

[0016] In some embodiments, the base plate is provided with an auxiliary limiting structure relative to the center of the workspace, and the auxiliary limiting structure is adapted to and limits the riser.

[0017] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0018] In this application, the completed riser suspension structure is connected to the mounting frame. After the mounting frame and riser suspension structure are moved to the limiting frame, they are installed on the limiting frame. The riser is then lifted into the suspension cylinder, where multiple locking rings engage with the locking rings, limiting the downward movement of the riser. At this point, the locking performance and load-bearing capacity of the multiple locking rings can be tested. Afterward, the riser is lifted again, the locking rings are unlocked, and the riser moves downward to the base plate. Operators check the inner wall of the suspension cylinder for scratches, ensuring there is a gap between the riser suspension structure and the riser after installation, to verify the dimensional accuracy of the riser suspension structure. This acceptance device provides an acceptance method for the riser suspension structure of a floating oil storage platform that does not exist in the market, improving the acceptance efficiency of the riser suspension structure and effectively reducing acceptance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the limiting platform of the present invention.

[0020] Figure 2 This is a cross-sectional view of the riser suspension structure accepted by the present invention.

[0021] Figure 3 yes Figure 1 Top view of the structure shown.

[0022] Figure 4 This is a schematic diagram of the limiting platform and riser of the present invention.

[0023] Figure 5 This is a schematic diagram of the mounting bracket of the present invention.

[0024] Figure 6 This is a cross-sectional view of the structure after the mounting bracket of the present invention is connected to the riser suspension structure.

[0025] Figure 7 This is a cross-sectional view of the riser structure of the present invention.

[0026] Figure 8 This is a cross-sectional view of the structure after the riser and the lifting device of the present invention are connected.

[0027] Figure 9 This is a cross-sectional view of the riser suspension structure of the present invention, located behind the acceptance device.

[0028] Figure 10 This is a cross-sectional view of the structure after the riser and the lifting device of the present invention are connected.

[0029] Figure 11 This is a schematic diagram of the structure of the riser and the locking mechanism before they are engaged.

[0030] Figure 12 yes Figure 11 Enlarged view of the structure at point A in the middle.

[0031] Figure 13 This is a schematic diagram of the structure of the riser and the locking mechanism of the present invention.

[0032] Figure 14 yes Figure 13 Enlarged view of the structure at point B.

[0033] Figure 15 This is a flowchart illustrating steps S1 to S4 of the acceptance method of the present invention.

[0034] Figure 16 This is a flowchart illustrating step S41 of the acceptance method of the present invention.

[0035] Figure 17This is a flowchart illustrating steps S5 to S7 of the acceptance method of the present invention.

[0036] The annotations in the attached figures are explained as follows:

[0037] 10. Riser suspension structure; 11. Suspension cylinder; 12. Locking mechanism; 20. Limiting platform; 300. Base plate; 310. Auxiliary limiting structure; 400. Limiting frame; 411. Limiting column; 412. Limiting beam; 413. Reinforcing beam; 420. Workspace; 421. Operating window; 422. Entrance / exit; 430. First limiting structure; 440. First operating corridor; 450. Second operating corridor; 460. Ladder; 470. Support rod; 500. Riser; 510. Riser hanging lug; 520. Locking ring; 530. Sealing structure; 600. Mounting frame; 611. Positioning rib; 612. Connecting rib; 613. Reinforcing rib; 620. Second limiting structure; 630. Positioning structure; 640. Mounting lug; 700. Lifting device. Detailed Implementation

[0038] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this application.

[0039] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In related technologies, there is no device for accepting the riser suspension structure 10 of a floating oil storage platform, thereby verifying whether the key indicators of the riser suspension structure 10 meet the standards. This application provides an acceptance device for the riser suspension structure 10 of a floating oil storage platform to solve this problem.

[0041] The floating oil storage platform includes a float, a support plate, and a riser suspension structure 10. The float is used to move and support the support plate and the riser suspension structure 10. The support plate extends horizontally and is fixedly connected to the float. Storage devices, cranes, and other equipment are installed on the support plate. The riser suspension structure 10 is located below the support plate and is positioned to limit the riser 500 at the end of the subsea crude oil pipeline, thereby facilitating the input of marine crude oil into the storage device through the riser suspension structure 10.

[0042] The riser suspension structure 10 includes a suspension cylinder 11 and multiple locking locks 12 mounted on the suspension cylinder 11. The lower end of the suspension cylinder 11 can be positioned to lock the riser 500 at the end of the subsea crude oil transport pipe, and the upper end of the suspension cylinder 11 can be connected to the storage device via a pipeline. This allows liquid minerals such as crude oil from the seabed to be transported sequentially through the transport pipe, the riser 500, and the riser suspension structure 10 to the storage device.

[0043] Multiple locking latches 12 are located on the outer periphery of the suspension cylinder 11, and are distributed in a ring-shaped interval along the circumference of the suspension cylinder 11, with equal spacing between any two adjacent locking latches 12. The locking latches 12 pass through the peripheral sidewall of the suspension cylinder 11 so as to extend into the interior of the suspension cylinder 11, thereby supporting and locking the riser 500 and providing uniform support and limiting force for the riser 500.

[0044] Figure 1 This is a schematic diagram of the limiting platform of the present invention.

[0045] See Figure 1 For ease of understanding and description, the state of the acceptance device of the floating oil storage platform riser suspension structure 10 placed on the working ground is taken as a reference. The orientation of the acceptance device relative to the working ground is referred to as the upper part of the following text, and the direction away from the upper part is referred to as the lower part of the following text.

[0046] Figure 2 This is a cross-sectional view of the riser suspension structure accepted by the present invention. Figure 3 yes Figure 1 Top view of the structure shown. Figure 4 This is a schematic diagram of the limiting platform and riser of the present invention.

[0047] See Figures 1 to 4This application provides an acceptance device for a riser suspension structure 10 of a floating oil storage platform, used to inspect the riser suspension structure 10. The device includes: a limiting platform 20, a riser 500, and a mounting frame 600. The limiting platform 20 includes a base plate 300 and a limiting frame 400. The base plate 300 extends horizontally, and the limiting frame 400 is mounted on the base plate 300. The limiting frame 400 extends circumferentially to enclose a working space 420. Multiple first limiting structures 430 are provided on the upper surface of the limiting frame 400. The riser 500 is detachably mounted on the base plate 300, located within the working space 420. A locking ring 520 adapted to a locking lock 12 is provided on the periphery of the riser 500 for locking. The ring 520 extends circumferentially along the riser 500; the mounting bracket 600 is provided with multiple positioning structures 630, which are detachably connected to the end of the suspension cylinder 11. The periphery of the mounting bracket 600 is provided with multiple second limiting structures 620 corresponding to multiple first limiting structures 430. The second limiting structures 620 can limit the first limiting structures 430 to limit the mounting bracket 600 on the limiting platform 20, thereby making the riser suspension structure 10 located above the riser 500; wherein, the riser 500 can move toward the interior of the suspension cylinder 11 so that the locking lock 12 engages with the locking ring 520, and there is a gap between the outer peripheral wall of the riser 500 and the inner peripheral wall of the suspension cylinder 11.

[0048] The riser 500 is located on the base plate 300 within the enclosure of the limiting frame 400. The operator moves the riser suspension structure 10 to be tested to the periphery of the acceptance device, moves the mounting frame 600 onto the riser suspension structure 10, and then connects the mounting frame 600 to the riser suspension structure 10 through the positioning structure 630.

[0049] Then, the mounting bracket 600 and the riser suspension structure 10 are moved onto the limiting bracket 400. The first limiting structure 430 and the second limiting structure 620 mutually limit each other, so that the mounting bracket 600 is limited to the limiting bracket 400, thereby making the riser suspension structure 10 located above the riser 500.

[0050] Next, the riser 500 is moved upward toward the suspension cylinder 11 so that it extends into the suspension cylinder 11. Once the riser 500 is inside the suspension cylinder 11, multiple locking latches 12 engage and support the riser 500, confining it within the suspension cylinder 11. At this point, the operator can verify that the multiple locking latches 12 are functioning correctly and can test their structural strength, support performance, and stability.

[0051] After the riser 500 has been placed inside the suspension cylinder 11 for a certain period of time, the riser 500 is raised from inside the suspension cylinder 11, multiple locking latches 12 are unlocked, and then the riser 500 is moved downwards and placed on the base plate 300. At this time, on the one hand, the structural strength and stability of the locking latches 12 can be tested, ensuring that the multiple locking latches 12 can still operate well after being subjected to heavy loads. On the other hand, operators can inspect the inner wall of the suspension cylinder 11 to check for scratches, abrasions, etc., thereby verifying whether the dimensional accuracy of the suspension cylinder 11 is up to standard. Furthermore, this effectively improves the inspection efficiency of the riser suspension structure 10 and reduces operating costs.

[0052] Finally, the first limiting structure 430 and the second limiting structure 620 are released, moving the mounting frame 600 and the riser suspension structure 10 onto the base plate 300 outside the limiting frame 400. Then, the mounting frame 600 is separated from the riser suspension structure 10 so that the mounting frame 600 can inspect the subsequent riser suspension structure 10.

[0053] Figure 5 This is a schematic diagram of the mounting bracket of the present invention. Figure 6 This is a cross-sectional view of the structure after the mounting bracket of the present invention is connected to the riser suspension structure. Figure 7 This is a cross-sectional view of the riser structure of the present invention. Figure 8 This is a cross-sectional view of the structure after the riser and the lifting device of the present invention are connected. Figure 9 This is a cross-sectional view of the riser suspension structure of the present invention, located behind the acceptance device.

[0054] See Figure 1 , Figure 2 , Figures 5 to 9 In this embodiment, the limiting platform 20 is used to limit and support the riser suspension structure 10, thereby enabling the acceptance of the riser suspension structure 10. The limiting platform 20 includes a base plate 300 and a limiting frame 400. The base plate 300 extends horizontally, and operators can move the limiting frame 400 and other structures on it by moving the base plate 300. This allows for the movement and placement of the acceptance device.

[0055] See Figure 3 In some embodiments, the base plate 300 is provided with an auxiliary limiting structure 310 at the center of the working space 420, and the auxiliary limiting structure 310 is adapted to and limits the riser 500.

[0056] In other embodiments, the base plate 300 has a protrusion on its inner peripheral wall relative to the riser 500, forming an auxiliary limiting structure 310. The outer peripheral wall of the auxiliary limiting structure 310 is adapted to the lower inner peripheral wall of the riser 500. This allows the riser 500 to engage with the auxiliary limiting structure 310 after being placed on the base plate 300, thereby confining the riser 500 to the center of the working space 420. This facilitates the coaxial arrangement of the riser 500 and the suspended cylinder 11, thereby improving the assembly and acceptance efficiency of the riser 500 and the suspended tank.

[0057] In other embodiments, the base plate 300 is recessed relative to the riser 500, and the recess forms an auxiliary limiting structure 310. The auxiliary limiting structure 310 can accommodate the riser 500. The inner peripheral wall of the auxiliary limiting structure 310 is adapted to the outer peripheral wall of the riser 500 to limit the riser 500 to the middle of the working space 420, so as to facilitate the alignment and engagement of the riser 500 with the suspension cylinder 11.

[0058] Figure 10 This is a cross-sectional view of the structure after the riser and the lifting device of the present invention are connected. Figure 11 This is a schematic diagram of the structure of the riser and the locking mechanism before they are engaged.

[0059] See Figure 1 , Figure 3 , Figures 9 to 11 In this embodiment, the limiting frame 400 is disposed on the base plate 300. The limiting frame 400 extends circumferentially to enclose and form a working space 420. The working space 420 extends vertically and is used to accommodate the riser 500 and the riser suspension structure 10, thereby enabling the riser 500 and the riser suspension structure 10 to move relative to each other and be limited within the working space 420. The upper surface of the limiting frame 400 extends horizontally to facilitate the installation of the mounting bracket 600 and to ensure that the riser suspension structure 10 is horizontally disposed within the working space 420. The axis of the suspension cylinder 11 is perpendicular to the base plate 300.

[0060] In some embodiments, the limiting frame 400 has an opening on one side to connect the workspace 420 with the outside space, thereby facilitating the replacement of the riser 500 and the entry and exit of the riser suspension structure 10 into and out of the workspace 420, improving the efficiency of the acceptance device. Simultaneously, it prevents the riser 500 and riser suspension structure 10 from being raised beyond the height of the limiting frame 400 during entry and exit, reducing the kinetic energy of the riser suspension structure 10 in the event of an accident and its fall onto the base plate 300, thus ensuring the safety of the operators.

[0061] In some embodiments, the limiting frame 400 includes at least four limiting columns 411, at least three limiting beams 412, and multiple reinforcing beams 413. The at least four limiting columns 411, at least three limiting beams 412, and multiple reinforcing beams 413 combine to form a quadrangular prism structure limiting frame 400. The four limiting columns 411 extend vertically and are arranged in a rectangular pattern. The space formed between the four limiting columns 411 is the working space 420, used to accommodate the riser 500 and the riser suspension structure 10. The limiting columns 411 are fixedly connected to the base plate 300 to improve the structural strength and load-bearing capacity of the limiting columns 411. The three limiting beams 412 extend horizontally and are located at the upper ends of the limiting columns 411, respectively connecting adjacent limiting beams 412, so that the three limiting beams 412 form three rectangular sides. After the three limiting beams 412 are connected to the limiting column 411, one side of the working space 420 is opened to allow the riser 500 and the riser suspension structure 10 to enter and exit the working space 420. Multiple reinforcing beams 413 are set between the limiting column 411 and the limiting beams 412 to improve the structural strength of the limiting column 411 and the limiting beams 412, so that the limiting frame 400 can support the riser suspension structure 10 and the riser 500, prevent the limiting frame 400 from being damaged due to excessive weight, and ensure the safety of the operators.

[0062] In some embodiments, a reinforcing wing is provided at the lower end of the limiting column 411. The reinforcing wing extends in the vertical direction and connects the peripheral sidewall of the limiting column 411 and the base plate 300 to improve the load-bearing capacity of the limiting column 411 in the horizontal direction. In other embodiments, the area of ​​the horizontal cross-section of the reinforcing wing gradually increases from top to bottom.

[0063] In some embodiments, an operation window 421 is formed between any two adjacent limiting columns 411 on the periphery of the workspace 420. After the riser suspension structure 10 enters the workspace 420, the operator can operate the riser suspension structure 10 through the operation window 421, thereby completing the inspection work of the riser suspension structure 10.

[0064] In other embodiments, there are multiple limiting beams 412, which are arranged above the limiting column 411 to form a rectangle. The riser 500 and the riser suspension structure 10 enter the working space 420 through the opening on the upper side of the limiting frame 400.

[0065] See Figure 1 , Figure 4 , Figures 9 to 11In this embodiment, the upper surface of the limiting frame 400 is provided with a plurality of first limiting structures 430, which can respectively limit the movement of the limiting structures 620 on the mounting frame 600. The plurality of first limiting structures 430 on the limiting frame 400 are limiting holes, and the plurality of second limiting structures 620 on the mounting frame 600 are limiting holes. The first limiting structures 430 and the second limiting structures 620 are connected by bolts.

[0066] In some embodiments, the first limiting structure 430 is disposed on the limiting beam 412. In other embodiments, multiple first limiting structures 430 are centrally symmetrically arranged with respect to multiple limiting beams 412, so that the limiting frame 400 can uniformly bear the force of the riser suspension structure 10 and the riser 500, preventing excessive local stress in the limiting frame 400. Furthermore, this also allows the riser suspension structure 10 to be located in the center of the working space 420 after the mounting bracket 600 is installed on the limiting frame.

[0067] In other embodiments, the first limiting structure 430 and the second limiting structure 620 may also be a snap-fit ​​structure, a threaded connection structure, etc.

[0068] See Figure 1 , Figure 4 , Figures 9 to 11 In this embodiment, the limiting platform 20 further includes a first operating corridor 440, a second operating corridor 450, and a ladder 460. The first operating corridor 440 is disposed on the base plate 300 and extends circumferentially around the limiting frame 400 to enclose the limiting frame 400. The first operating corridor 440 is fixedly connected to the limiting frame 400 to improve the structural strength and load-bearing capacity of the limiting frame 400.

[0069] The second operating corridor 450 is fixed above the first operating corridor 440. The second operating corridor 450 extends around the circumference of the limiting frame 400. An entrance 422 is provided on one side of the second operating corridor 450. The entrance 422 allows the riser 500 dummy and the riser suspension structure 10 to move horizontally and enter the working space 420. The second operating corridor 450 is fixedly connected to the limiting frame 400.

[0070] The second operating corridor 450 facilitates the connection between the mounting frame 600 and the limiting frame 400, allows operators to check the connection between the mounting frame 600 and the limiting frame 400, and also allows operators to check the upper structure of the riser suspension structure 10.

[0071] The design of the first operating corridor 440 and the second operating corridor 450 facilitates the movement and operation of personnel around the riser suspension structure 10, enabling inspection of the riser suspension structure 10. It also facilitates the use and inspection of the locking mechanism 12 on the riser suspension structure 10, improving the acceptance efficiency of the riser suspension structure 10.

[0072] The side of the second operating corridor 450 away from the workspace 420 is also connected to the first operating corridor 440 to support the second operating corridor 450 and improve the safety performance of the limit platform 20.

[0073] In some embodiments, the upper surface of the second operating corridor 450 is flush with the upper surface of the limiting frame 400 so that a portion of the structure of the mounting frame 600 rests against the second operating corridor 450, and the second operating corridor 450 also bears a portion of the weight of the mounting frame 600.

[0074] See Figure 1 , Figure 5 , Figures 9 to 11 In this embodiment, the ladder 460 extends vertically and is fixedly connected to and communicates with the first operating corridor 440 and the second operating corridor 450 to facilitate the entry and exit of operators in the first operating corridor 440 and the second operating corridor 450. In some embodiments, the ladder 460 is located on the side of the first operating corridor 440 and the second operating corridor 450 away from the entrance 422 to facilitate the entry and exit of the riser suspension structure 10 and to ensure the safety of operators when moving up and down via the ladder 460.

[0075] In this embodiment, guardrails are also provided on the side of the first operating corridor 440 and the second operating corridor 450 away from the workspace 420 to prevent operators from falling from the first operating corridor 440 and the second operating corridor 450 and to ensure the safety of the operators.

[0076] In some embodiments, the limiting platform 20 further includes a support rod 470 located on the lower side of the first operating corridor 440. The support rod 470 connects the first operating corridor 440 and the limiting column 411, thereby forming a triangular stable structure with the first operating corridor 440, the support rod 470, and the limiting column 411 to improve the structural strength of the first operating corridor 440.

[0077] The support rod 470 is located on the lower side of the second operating corridor 450. The support rod 470 connects the second operating corridor 450 and the limiting column 411, thereby forming a triangular stable structure with the second operating corridor 450, the support rod 470 and the limiting column 411 to improve the structural strength of the second operating corridor 450.

[0078] The structures in the above embodiments are not fixed combinations. Without structural conflicts, the structures in multiple embodiments can be arbitrarily combined. For example, there can be multiple limiting columns 411, ensuring that the perimeter of the limiting frame 400 formed by combining multiple limiting columns 411 has an operating window 421. As another example, the support rod 470 can connect the first operating corridor 440 and guardrails, etc.

[0079] Figure 5 , Figure 6 , Figures 9 to 11 In this embodiment, the mounting frame 600 includes at least two positioning ribs 611, at least two connecting ribs 612, and multiple reinforcing ribs 613. The two positioning ribs 611 extend horizontally, and each end of the two positioning ribs 611 is provided with a second limiting structure 620. Two connecting ribs 612 are provided between the two positioning ribs 611, and both ends of the two connecting ribs 612 are respectively connected to the two positioning ribs 611. A reinforcing rib 613 is also provided between a positioning rib 611 and an adjacent connecting rib 612, and both ends of the reinforcing rib 613 are respectively connected to a positioning rib 611 and an adjacent connecting rib 612. The second limiting structures 620 at both ends of the positioning ribs 611 respectively limit the mounting frame 600 to the first limiting structures 430 on the limiting beams 412 on both sides of the working space 420, so that the mounting frame 600 can be limited to the limiting platform 20 by the second limiting structures 620, and the riser suspension structure 10 on the mounting frame 600 is located in the middle of the working space 420.

[0080] In some embodiments, the positioning rib 611 forms a triangular structure with an adjacent connecting rib 612 and an adjacent reinforcing rib 613 to improve the structural strength of the mounting bracket 600.

[0081] In the spacing direction of the two connecting ribs 612, the distance between the two connecting ribs 612 and the center of the positioning rib 611 is the same. The plurality of positioning structures 630 includes a first group of positioning structures 630 and a second group of positioning structures 630. The first group of positioning structures 630 is respectively disposed at the intersection of the end of the connecting rib 612 and the positioning rib 611, and the second group of positioning structures 630 is respectively disposed at the center of the positioning rib 611 and the connecting rib 612.

[0082] The first and second positioning structures 630 can respectively limit the positioning of riser suspension structures 10 of different sizes. This enables the acceptance device to inspect riser suspension structures 10 of different sizes, thereby increasing the acceptance range of the device, reducing acceptance costs, and improving the working efficiency of the device.

[0083] In other embodiments, both the first positioning structure 630 and the second positioning structure 630 are positioning holes. The upper end of the suspension cylinder 11 is also provided with a perforated structure, and the first positioning structure 630 or the second positioning structure 630 is bolted to the suspension cylinder 11 so that the mounting bracket 600 is connected to the riser suspension structure 10.

[0084] In other embodiments, the positioning structure 630 on the mounting bracket 600 is a detachable structure such as a snap-fit ​​structure or a clamping structure, so as to realize the detachable connection between the mounting bracket 600 and the suspension positioning structure 630 of the riser 500.

[0085] In this embodiment, the mounting bracket 600 further includes a plurality of mounting ears 640, which are respectively disposed on the positioning ribs 611.

[0086] In this embodiment, a lifting device 700 is also provided on the outside of the acceptance device, which can lift the riser suspension structure 10, the mounting frame 600, and the riser 500 away from the base plate 300, and can also lift the riser suspension structure 10, the mounting frame 600, and the riser 500 and place them on the base plate 300.

[0087] The lifting device 700 is detachably connected to the mounting lug 640, which allows the lifting device 700 to lift the mounting frame 600 through the mounting lug 640, so as to facilitate the connection and separation of the mounting frame 600 from the riser suspension structure 10.

[0088] The lifting device 700 can also lift the mounting plate and the three-dimensional suspension structure by installing the mounting lugs 640, so as to move the mounting plate and install it on the limiting platform 20. The lifting device 700 can also lift the mounting plate and the three-dimensional suspension structure away from the limiting platform 20 by installing the mounting lugs 640, so as to facilitate the connection and separation of the mounting frame 600 and the limiting platform 20.

[0089] Figure 12 yes Figure 11 Enlarged view of the structure at point A in the middle. Figure 13 This is a schematic diagram of the structure of the riser and the locking mechanism of the present invention. Figure 14 yes Figure 13 Enlarged view of the structure at point B.

[0090] See Figures 9 to 14 In this embodiment, the side walls of the suspension cylinder 11 are coated with a paint layer (not shown in the figure) to prevent the seawater during transportation from corroding the suspension cylinder 11 and reducing the service life of the riser suspension structure 10.

[0091] See Figure 7 , Figure 8 , Figure 12 , Figure 14 In this embodiment, a locking ring 520 is provided on the outer periphery of the riser 500. The locking ring 520 can engage with the locking lock 12 so that after the riser 500 extends into the interior of the suspension cylinder 11 under the action of the lifting device 700, multiple locking locks 12 lock with the locking ring 520 to limit the riser 500 to be located inside the suspension cylinder 11.

[0092] In some embodiments, the engaging ring 520 gradually decreases in size in the direction away from the axis of the riser 500, so that the lower side of the engaging ring 520 is inclined and intersects the axis of the riser 500. A rack is provided on the lower side of the engaging ring 520, and the rack is arranged circumferentially along the riser 500.

[0093] When the locking lock 12 is engaged, it abuts against the lower side of the locking ring 520 to limit the downward movement of the riser 500 relative to the suspension cylinder 11. The locking lock 12 has a latch on the side facing the riser 500 relative to the rack, allowing it to engage with the rack to limit the circumferential rotation of the riser 500. At this time, the operator can check the engagement status of the locking lock 12 and whether it can support the riser 500.

[0094] In some embodiments, the lower side of the engaging ring 520 is recessed with a notch so that the engaging ring 520 can engage with the engaging lock 12 to limit the circumferential rotation of the riser 500 relative to the riser suspension structure 10.

[0095] In this embodiment, a riser lug 510 is also provided on the inner peripheral wall of the upper end of the riser 500. The riser lug 510 can be connected to the lifting device 700 so that the lifting device 700 can lift the riser 500 and move it toward the suspension cylinder 11. At this time, the axis of the riser 500 is coaxial with the axis of the suspension cylinder 11, so as to facilitate the detection of the dimensional accuracy of the riser suspension structure 10.

[0096] When the dimensional accuracy of the suspension cylinder 11 fails the acceptance test, the riser 500 will scrape against the inner circumferential wall of the suspension cylinder 11, damaging the paint layer on the inner circumferential wall and affecting the use of the riser suspension structure 10. When the dimensional accuracy of the suspension cylinder 11 passes the acceptance test, the riser 500 extends into the suspension cylinder 11, with a gap between the outer circumferential wall of the riser 500 and the inner circumferential wall of the suspension cylinder 11 to prevent scraping between the riser suspension structure 10 and the riser 500 during engagement, thus ensuring the integrity of the paint layer.

[0097] In related technologies, the gap between the inner circumferential wall of the suspension cylinder 11 and the outer circumferential wall of the riser 500 is less than or equal to 3mm, which has extremely high precision requirements.

[0098] In this embodiment, a sealing structure 530 is also provided on the outer periphery of the riser 500. The sealing structure 530 extends circumferentially along the riser 500 and is located above the engaging ring 520. After the riser 500 is engaged and limited by the suspension structure, the sealing mechanism seals the gap between the riser 500 and the suspension structure to prevent the liquid transported by the riser 500 from leaking to the outside through the gap between the riser 500 and the suspension cylinder 11.

[0099] In some embodiments, the sealing structure 530 is a silicone sealing ring or the like. The sealing structure 530 can also be a rubber sealing ring or a flexible plastic sealing ring.

[0100] In some embodiments, the lifting device 700 can remove the riser 500 from the workspace 420 to replace the riser 500. This allows for the acceptance of different types of riser suspension structures 10.

[0101] See Figures 1 to 14 In this embodiment, when the riser suspension structure 10 needs to be inspected, the operator moves the riser suspension structure 10 to the side of the limiting platform 20 and determines whether the riser 500 needs to be replaced by the lifting device 700 according to the size and type of the riser suspension structure 10, so that the riser 500 can be adapted to the riser suspension structure 10.

[0102] The operator manipulates the lifting device 700 to move the mounting frame 600 to the upper end of the riser suspension structure 10, and limits its position with the riser suspension structure 10 via the positioning structure 630 on the mounting frame 600. Then, the lifting device 700 moves the mounting frame 600 onto the limiting frame 400, so that the mounting frame 600 and the limiting platform 20 are limited by the first limiting structure 430 and the second limiting structure 620. This positions the riser suspension structure 10 above the riser 500, and the axis of the riser suspension structure 10 is coaxial with the axis of the riser 500, facilitating the engagement and limiting of the riser 500 and the riser suspension structure 10. At this point, the operator can check and verify that the functions of each component on the riser suspension structure 10 are intact.

[0103] The operator manipulates the lifting device 700 to pass through the suspension cylinder 11 and connect it to the riser lug 510 inside the riser 500, and moves the riser 500 toward the riser suspension structure 10. During the movement of the riser 500 toward the suspension cylinder 11, the lifting device 700 makes the axis of the riser 500 coaxial with the axis of the suspension cylinder 11, and causes the riser 500 to extend into the suspension cylinder 11.

[0104] After the riser 500 extends into the suspension cylinder 11, the locking ring 520 is located above the locking lock 12. After multiple locking locks 12 are engaged, the locking lock 12 limits the locking ring 520 to rotate circumferentially and move downward, thereby supporting and confining the riser 500 within the suspension cylinder 11. At this time, the operator can check whether the locking lock 12 can lock the riser 500 and check the supporting performance of the locking lock 12.

[0105] After the riser 500 and the riser suspension structure 10 are engaged for a certain period of time, the riser 500 is lifted upwards within the suspension cylinder 11 by the lifting device 700, and then the locking lock 12 is unlocked. This allows the riser 500 to move downwards and be removed from the suspension cylinder 11. After being removed from the suspension cylinder 11, the riser 500 moves onto the base plate 300 and is restrained by the auxiliary limiting structure 310, thus facilitating the subsequent acceptance of the riser suspension structure 10. Once the riser 500 has moved to the base plate 300, the operator can inspect the paint layer on the inner wall of the suspension cylinder 11 to verify the dimensional accuracy of the riser suspension structure 10, ensuring its service life and safety.

[0106] After the inspection of the riser suspension structure 10 is completed, the second limiting structure 620 on the mounting frame 600 separates from the first limiting structure 430 on the limiting platform 20. The lifting device 700 moves the mounting frame 600 and the three-dimensional suspension structure onto the peripheral base plate 300 of the limiting platform 20. Then, the riser suspension structure 10 is disassembled from the mounting frame 600 to facilitate the subsequent use of the mounting frame 600, thus completing the acceptance of the riser suspension structure 10. This acceptance device effectively improves the acceptance efficiency of the riser suspension structure 10 and ensures the safety and convenience of the riser suspension structure 10 during acceptance.

[0107] Figure 15 This is a flowchart illustrating steps S1 to S4 of the acceptance method of the present invention.

[0108] See Figure 1 , Figures 9 to 14 , Figure 15 The present invention also provides an acceptance method for the riser suspension structure 10 of a floating oil storage platform, which is applied to the acceptance device of the aforementioned floating oil storage platform riser suspension structure 10 to accept the riser suspension structure 10. The acceptance device includes a base plate 300, a limiting frame 400, a mounting frame 600, and a riser 500, and includes the following steps:

[0109] Step S1: The limiting frame 400 is located on the base plate 300, and the riser 500 moves to the base plate 300 within the range enclosed by the limiting frame 400.

[0110] In step S2, the mounting bracket 600 moves onto the riser suspension structure 10 and is positioned relative to the riser suspension structure 10.

[0111] In step S3, the mounting bracket 600 and the riser suspension structure 10 move and are confined on the limiting bracket 400, with the riser suspension structure 10 located above the riser 500.

[0112] Step S4: The riser suspension structure 10 includes a suspension cylinder 11 and a plurality of locking locks 12 located around the suspension cylinder 11. The riser 500 moves toward the interior of the suspension cylinder 11. After the riser 500 extends into the suspension cylinder 11, the plurality of locking locks 12 lock the riser 500 so that the riser 500 is confined to the suspension cylinder 11, so as to verify whether the plurality of locking locks 12 can be locked.

[0113] By using this acceptance method to inspect the riser suspension structure 10, it is possible to quickly detect whether the engagement process between the riser 500 and the locking mechanism 12 is intact, ensuring the support of the riser suspension structure 10 for the riser 500, improving the acceptance efficiency of the riser 500 suspension device, and ensuring the safety of operators during the acceptance process.

[0114] Figure 16 This is a flowchart illustrating step S41 of the acceptance method of the present invention.

[0115] See Figure 16 In this embodiment, step S4 further includes step S41. In step S41, after the riser 500 extends into the suspension cylinder 11, the locking ring 520 extends upward beyond the locking lock 12. After the locking lock 12 is locked, the riser 500 moves downward so that the locking ring 520 engages with the locking lock 12.

[0116] Figure 17 This is a flowchart illustrating steps S5 to S7 of the acceptance method of the present invention.

[0117] See Figure 17 In this embodiment, the inner peripheral wall of the suspension cylinder 11 is also coated with a paint layer. The acceptance method also includes steps S5 and S6. In step S5, the riser 500 is raised inside the suspension cylinder 11 to separate from the locking 12, and then multiple locking 12s are unlocked, so that the riser 500 moves downward onto the base plate 300.

[0118] Step S6: Observe whether the paint layer on the inner peripheral wall of the suspension cylinder 11 is scratched, so as to determine whether there is a gap between the outer peripheral wall of the riser 500 and the inner peripheral wall of the suspension cylinder 11, thereby determining whether the dimensional accuracy of the riser suspension structure 10 is qualified.

[0119] In step S5, on the one hand, the limiting and separation process between the riser suspension structure 10 and the riser 500 is simplified, improving the connection efficiency between the riser suspension structure 10 and the riser 500. On the other hand, because the riser 500 and the riser 500 suspension device move relative to each other in the vertical direction to engage, it can prevent the riser 500 and the riser 500 suspension device from tilting under the action of gravity, thereby eliminating the influence of gravity on the test and acceptance results.

[0120] In some embodiments, the acceptance method further includes: step S7, after the riser 500 moves away from the riser suspension structure 10 to the base plate 300, the mounting frame 600 and the riser suspension structure 10 rotate to the base plate 300 outside the limiting frame 400, so as to separate the mounting frame 600 to facilitate the subsequent acceptance of the riser suspension structure 10.

[0121] In some embodiments, as the riser 500 moves toward the suspension cylinder 11, the axis of the suspension cylinder 11 is coaxial with the axis of the riser 500. This ensures the stability of the riser 500 and the riser suspension structure 10 during the connection process, thereby improving the reliability of the acceptance results of the riser suspension structure 10.

[0122] In this application, the completed riser suspension structure 10 is connected to the mounting frame 600. After the mounting frame 600 and the riser suspension structure 10 are moved to the limiting frame 400, they are installed on the limiting frame 400. Then, the riser 500 is lifted into the suspension cylinder 11 so that multiple locking locks 12 engage with the locking ring 520, limiting the downward movement of the riser 500. At this time, the locking performance and load-bearing capacity of the multiple locking locks 12 can be tested. Afterward, the riser 500 is lifted, the locking locks 12 are unlocked, and the riser 500 moves downward onto the base plate 300. The operator checks whether there are scratches on the inner circumferential wall of the suspension cylinder 11, ensuring that there is a gap between the riser suspension structure 10 and the riser 500 after installation, in order to check whether the dimensional accuracy of the column suspension structure is qualified. This acceptance device provides an acceptance method for the riser suspension structure 10 of a floating oil storage platform that does not exist on the market, thereby improving the acceptance efficiency of the riser suspension structure 10 and effectively reducing the acceptance cost.

[0123] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An acceptance method for the riser suspension structure of a floating oil storage platform, characterized in that, It includes an acceptance device for the riser suspension structure of a floating oil storage platform. The acceptance device includes a base plate, a limiting frame, a mounting frame, and a riser, for accepting the riser suspension structure. The acceptance device includes the following steps: The limiting frame is located on the base plate, and the riser moves to the base plate within the area enclosed by the limiting frame; The mounting bracket moves onto the riser suspension structure and is positioned relative to the riser suspension structure; The mounting frame and the riser suspension structure are movable and confined on the limiting frame, and the riser suspension structure is located above the riser; The riser suspension structure includes a suspension cylinder and multiple locking locks located around the suspension cylinder. The riser moves toward the interior of the suspension cylinder. After the riser extends into the suspension cylinder, the multiple locking locks lock the riser so that the riser is confined to the suspension cylinder, thereby enabling verification of whether the multiple locking locks can be locked. The inner peripheral wall of the suspension cylinder is also coated with a paint layer; the riser is raised in the suspension cylinder to separate from the locking mechanism, and then multiple locking mechanisms are unlocked, so that the riser moves downward to the base plate; observe whether the paint layer on the inner peripheral wall of the suspension cylinder is scratched to determine whether there is a gap between the outer peripheral wall of the riser and the inner peripheral wall of the suspension cylinder, thereby determining whether the dimensional accuracy of the riser suspension structure is qualified.

2. The acceptance method according to claim 1, characterized in that, After the riser moves away from the riser suspension structure to the base plate, the mounting frame and the riser suspension structure rotate to the base plate outside the limiting frame body to separate the mounting frame for subsequent acceptance of the riser suspension structure.

3. The acceptance method according to claim 1, characterized in that, As the riser moves toward the suspension cylinder, the axis of the suspension cylinder is coaxial with the axis of the riser.

4. An acceptance device for a riser suspension structure of a floating oil storage platform, wherein the riser suspension structure includes a suspension cylinder and a plurality of locking devices disposed on the suspension cylinder, characterized in that, Its application is to inspect the riser suspension structure according to any one of claims 1 to 3, wherein the inspection device includes: A limiting platform includes a base plate and a limiting frame. The base plate extends horizontally, and the limiting frame is disposed on the base plate. The limiting frame extends circumferentially to enclose and form a working space. A plurality of first limiting structures are provided on the upper surface of the limiting frame. A riser is detachably mounted on the base plate. The riser is located within the working space. A locking ring adapted to the locking lock is provided on the periphery of the riser. The locking ring extends circumferentially along the riser. The mounting frame has multiple positioning structures, which are detachably connected to the end of the suspension cylinder. The periphery of the mounting frame has multiple second limiting structures corresponding to the multiple first limiting structures. The second limiting structures can limit the mounting frame to the limiting platform, thereby making the riser suspension structure located above the riser. The riser can move toward the interior of the suspension cylinder so that the locking lock engages with the locking ring, and there is a gap between the outer peripheral wall of the riser and the inner peripheral wall of the suspension cylinder.

5. The acceptance device according to claim 4, characterized in that, The mounting bracket includes two positioning ribs that extend horizontally and are provided with a second limiting structure at their ends. Two connecting ribs are provided between the two positioning ribs and are respectively connected to the two positioning ribs at both ends. A reinforcing rib is also provided between one positioning rib and an adjacent connecting rib, and the two ends of the reinforcing rib are respectively connected to one positioning rib and an adjacent connecting rib.

6. The acceptance device according to claim 5, characterized in that, In the spacing direction of the two connecting ribs, the distance from the center of the two connecting ribs to the center of the positioning rib is the same; the plurality of positioning structures include a first group of positioning structures and a second group of positioning structures, the first group of positioning structures is respectively disposed at the intersection of the end of the connecting rib and the positioning rib, and the second group of positioning structures is respectively disposed at the center of the positioning rib and the connecting rib; the first group of positioning structures and the second group of positioning structures can respectively limit the vertical pipe suspension structure of different sizes.

7. The acceptance device according to claim 5, characterized in that, The mounting bracket also includes multiple mounting ears, which are respectively disposed on the positioning ribs.

8. The acceptance device according to claim 4, characterized in that, The limiting platform further includes a first operating corridor, a second operating corridor, and a ladder. The first operating corridor is disposed on the base plate and extends circumferentially around the limiting frame to enclose it. The first operating corridor is fixedly connected to the limiting frame. The second operating corridor is fixedly disposed above the first operating corridor and extends circumferentially around the limiting frame. An entrance / exit is provided on one side of the second operating corridor, allowing the riser dummy and the riser suspension structure to move horizontally and enter the workspace. The second operating corridor is fixedly connected to the limiting frame, and its upper surface is flush with the upper surface of the limiting frame. The ladder extends vertically and is fixedly connected to and communicates with the first and second operating corridors.

9. The acceptance device according to claim 4, characterized in that, The base plate is provided with an auxiliary limiting structure relative to the center of the workspace, and the auxiliary limiting structure is adapted to and limits the riser.

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