A device for adjusting the level of an offshore jacket

Abstract

The utility model relates to a kind of offshore jacket levelness adjusting device. Including sleeve, multiple radial arrangement's pipe clamp hydraulic cylinder is installed on the lateral wall of sleeve, pressure plate is installed on the inner end of the piston rod of each pipe clamp hydraulic cylinder, top annular plate with top plate window in middle is installed on the inside of top edge of sleeve, multiple top stake hydraulic cylinders are installed on top annular plate, the pressure stake annular plate with pressure plate window in middle is further provided on the inner cavity upper portion of sleeve, and the lower end of the piston rod of each top stake hydraulic cylinder is fixedly connected with pressure stake annular plate;Multiple hangers for being connected with hawser are also installed on top annular plate.The utility model provides a kind of offshore jacket levelness adjusting device, by constructing the structure reasonable jacket levelness adjusting device, can improve the construction reliability and effectiveness in the process of large-scale jacket installation, and improve the efficiency and construction safety of offshore construction.

Description

Technical Field

[0001] This utility model belongs to the technical field of offshore wind power installation equipment, and in particular relates to an offshore jacket leveling adjustment device. Background Technology

[0002] In recent years, offshore wind power projects have been constructed on a large scale along China's coast. As offshore wind power construction capabilities mature, wind farms are increasingly being located in deeper waters. In projects with greater water depth, jacket foundations are being used more and more frequently. Jacket foundations consist of a bottom pile foundation and an upper jacket structure. They are suitable for deeper waters, have mature design and construction technologies, and are currently widely used in offshore wind farm construction in my country. As the foundation of offshore wind turbines, the jacket structure requires controlling the levelness of its transition section flange face to ≤3‰ during construction. However, currently, there is a lack of suitable technical means to adjust the levelness of the jacket structure during construction.

[0003] In summary, the development and design of a device for adjusting the level of jacket structures is a necessity in the industry. By constructing a reasonably structured device for adjusting the level of jacket structures, the reliability and effectiveness of construction during the installation of large jacket structures can be improved, as well as the efficiency and safety of offshore construction. Summary of the Invention

[0004] The purpose of this invention is to provide a horizontal adjustment device for offshore jackets. By constructing a reasonably structured horizontal adjustment device for jackets, the reliability and effectiveness of construction during the installation of large jackets can be improved, as well as the efficiency and safety of offshore construction.

[0005] The technical solution adopted by this utility model is as follows: a horizontal adjustment device for a marine jacket, including a sleeve, a plurality of radially arranged clamping hydraulic cylinders installed on the side wall of the sleeve, a pressure plate installed at the inner end of the piston rod of each clamping hydraulic cylinder, a top annular plate with a top plate window in the middle installed on the inner side of the top edge of the sleeve, a plurality of jacking hydraulic cylinders installed on the top annular plate, and a jacking annular plate with a pressure plate window in the middle provided in the upper part of the inner cavity of the sleeve, the jacking annular plate being fixedly connected to the lower end of the piston rod of each jacking hydraulic cylinder; a plurality of lifting rings for connecting with lifting cables are also installed on the top annular plate.

[0006] Preferably, a central reinforcing annular plate is welded and installed in the middle of the outer wall of the casing, and a bottom reinforcing annular plate is welded and installed at the bottom of the outer wall of the casing, with each clamping hydraulic cylinder located between the central reinforcing annular plate and the bottom reinforcing annular plate.

[0007] Preferably, the clamping hydraulic cylinders are arranged at equal angular intervals along the circumference, with a quantity of 4 to 8; the jacking hydraulic cylinders are arranged at equal angular intervals along the circumference, with a quantity of 3 to 6.

[0008] Preferably, multiple side guide sleeves are installed in the middle of the side wall of the casing, and the piston rods of each clamping hydraulic cylinder are located in each side guide sleeve; multiple top guide sleeves are installed on the top annular plate, and the piston rods of each jacking hydraulic cylinder are located in each top guide sleeve.

[0009] Preferably, the lifting rings are arranged at equal angular intervals along the circumference, with a quantity of 3 to 6.

[0010] The advantages and positive effects of this utility model are: This invention provides a horizontal adjustment device for offshore jacket structures. By installing a sleeve and multiple hydraulic cylinders with pressure plates at the ends of piston rods on the side wall of the sleeve, the horizontal adjustment device can be hydraulically clamped and fixed onto the root pipe of the jacket structure. A pile-pressing annular plate, driven by multiple pile-pressing hydraulic cylinders, is used to jack the upper end of the pile pipe. During the installation of the jacket structure, the root pipe is fitted onto the pile pipe. By controlling the extension and retraction of the piston rods of each pile-pressing hydraulic cylinder, the horizontal adjustment of the jacket structure can be achieved hydraulically. This device offers strong leveling capability and high operational efficiency, enabling rapid adjustment of the transition flange of the jacket structure to the required installation values. Although located underwater, this offshore jacket horizontal adjustment device can be hydraulically controlled using a control system located on a surface platform, improving the reliability and effectiveness of construction during the installation of large jacket structures, and enhancing the efficiency and safety of offshore construction. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of this utility model in use.

[0012] In the picture: 1. Sleeve; 2. Middle reinforcing annular plate; 3. Bottom reinforcing annular plate; 4. Pipe clamping hydraulic cylinder; 5. Top pile hydraulic cylinder; 6. Lifting ring; 7. Lifting cable; 8. Top annular plate; 9. Top plate window; 10. Pipe driving annular plate; 11. Pressure plate window; 12. Top guide sleeve; 13. Side guide sleeve; 14. Pressure plate; 15. Casing root tube; 16. Pile tube. Detailed Implementation

[0013] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0014] Please see Figure 1 , Figure 2 and Figure 3The present invention relates to a horizontal adjustment device for a marine jacket, comprising a sleeve 1, which is a thick-walled metal tube. Typically, the diameter of the sleeve 1 is 2 to 4 meters, the wall thickness is 5 to 8 centimeters, and the height is 1 to 2 meters.

[0015] In this embodiment, a central reinforcing annular plate 2 is welded and installed in the middle of the outer wall of the sleeve 1, and a bottom reinforcing annular plate 3 is welded and installed at the bottom of the outer wall of the sleeve 1. Both the central reinforcing annular plate 2 and the bottom reinforcing annular plate 3 are formed by cutting thick steel plates and welded and installed on the outside of the sleeve 1. The purpose of setting the central reinforcing annular plate 2 and the bottom reinforcing annular plate 3 is to improve the overall structural strength of this leveling adjustment device.

[0016] Multiple radially arranged clamping hydraulic cylinders 4 are installed on the side wall of the sleeve 1. A pressure plate 14 is installed on the inner end of the piston rod of each clamping hydraulic cylinder 4, as shown in the figure. Each clamping hydraulic cylinder 4 is located between the middle reinforcing annular plate 2 and the bottom reinforcing annular plate 3. The clamping hydraulic cylinders 4 are arranged at equal angles along the circumference, and the number is 4 to 8. In the specific form shown in the figure, 4 clamping hydraulic cylinders 4 are provided.

[0017] A top annular plate 8 with a top plate window 9 in the middle is installed on the inner side of the top edge of the casing 1. Multiple pile-jacking hydraulic cylinders 5 are installed on the top annular plate 8. A pile-pressing annular plate 10 with a pressure plate window 11 in the middle is also provided in the upper part of the inner cavity of the casing 1. The pile-pressing annular plate 10 is fixedly connected to the lower end of the piston rod of each pile-jacking hydraulic cylinder 5. The top annular plate 8 is made of thick steel plate and its outer edge is welded to the top edge of the casing 1. The purpose of the top plate window 9 in the middle is to allow water to flow up and down during construction. The pile-pressing annular plate 10 presses against the upper end of the pile pipe 16. The horizontality is adjusted by controlling the synchronous extension and retraction of the piston rods of each pile-jacking hydraulic cylinder 5. The pile-pressing annular plate 10 is made of thick steel plate, and the purpose of the pressure plate window 11 in the middle is to allow water to flow up and down during construction.

[0018] In this embodiment, the hydraulic cylinders 5 for jacking the pile are arranged at equal angular intervals along the circumference, and the number is 3 to 6. In the specific form shown in the figure, there are 4 hydraulic cylinders 5 for jacking the pile.

[0019] In this embodiment, a plurality of side guide sleeves 13 are installed in the middle of the side wall of the sleeve 1, and the piston rods of each clamping hydraulic cylinder 4 are located in each side guide sleeve 13; a plurality of top guide sleeves 12 are installed on the top annular plate 8, and the piston rods of each jacking hydraulic cylinder 5 are located in each top guide sleeve 12.

[0020] Multiple lifting rings 6 for connecting to the lifting cable 7 are also installed on the top annular plate 8. In this embodiment, the lifting rings 6 are arranged at equal angular intervals along the circumference, with a quantity of 3 to 6. In the specific form shown in the figure, 4 lifting rings 6 are provided. The lifting cable 7 is raised and lowered by the construction equipment crane, and the leveling device and guide frame are lowered onto the pile pipe 16 of the underwater pile foundation accordingly. After construction, the leveling device is raised above the water surface for retrieval.

[0021] Construction method: Existing catheter stents typically have three or four catheter stent root canals 15. The number of leveling adjustment devices used during construction is the same as the number of catheter stent root canals 15; that is, the number of leveling adjustment devices required corresponds to the number of catheter stent root canals 15. Before installation, each leveling adjustment device is installed on the upper part of each catheter stent root canal 15. Specifically, the upper part of the catheter stent root canal 15 is inserted into the inner cavity of the sleeve 1. Then, the piston rods of each clamping hydraulic cylinder 4 are simultaneously extended, and each pressure plate 14 presses against the outer wall of the catheter stent root canal 15. After stabilization, the leveling adjustment device is integrated with the catheter stent root canal 15 by the hydraulic clamping action of each clamping hydraulic cylinder 4. A level gauge or level sensor is installed on the transition flange of the catheter stent. Then, the guide frame and its multiple leveling adjustment devices are lowered underwater using a crane from the construction equipment. When they reach the underwater pile foundation, each pile pipe 16 of the pile foundation (the number of pile pipes 16 is the same as the number of root pipes 15 of the guide frame and their positions correspond) is inserted into each root pipe 15 of the guide frame until the upper end of the pile pipe 16 contacts the bottom surface of the pile driving ring plate 10. This is the initial state before leveling. The level of the transition flange of the guide frame can be obtained by the aforementioned leveling instrument or leveling sensor. Based on the levelness measurement, control the piston rods of each hydraulic cylinder 5 of the levelness adjustment device to extend and retract; for example... Figure 3 As shown, when the piston rods of each jacking hydraulic cylinder 5 extend downwards synchronously, since the position of the pile tube 16 is stationary, the guide frame root tube 15 moves upwards in the vertical direction, thus lifting the guide frame root tube 15 upwards. Conversely, when the piston rods of each jacking hydraulic cylinder 5 retract upwards synchronously, the guide frame root tube 15 moves downwards in the vertical direction, thus lowering the guide frame root tube 15 accordingly. By adjusting the leveling of each guide frame root tube 15 of the guide frame with appropriate lifting and lowering through each leveling adjustment device, the leveling of the transition section flange surface of the guide frame is achieved. After the aforementioned operations are completed, divers will go underwater to perform welding work, welding the guide tube 15 and its inner pile tube 16 together as a whole. After the construction, the piston rods of each clamping hydraulic cylinder 4 will retract, the hydraulic clamping effect on the guide tube 15 will disappear, and the leveling adjustment device will separate from the guide tube 15. Then, the leveling adjustment device will be lifted to the water surface by a crane, ready for use in the next guide tube installation and leveling adjustment.

Claims

1. A horizontal adjustment device for a marine jacket, characterized in that: The casing (1) includes a sleeve (1), on which a plurality of radially arranged clamping hydraulic cylinders (4) are installed. A pressure plate (14) is installed on the inner end of the piston rod of each clamping hydraulic cylinder (4). A top annular plate (8) with a top plate window (9) in the middle is installed on the inner side of the top edge of the sleeve (1). A plurality of pile-pushing hydraulic cylinders (5) are installed on the top annular plate (8). A pile-pressing annular plate (10) with a pressure plate window (11) in the middle is also provided in the upper part of the inner cavity of the sleeve (1). The pile-pressing annular plate (10) is fixedly connected to the lower end of the piston rod of each pile-pushing hydraulic cylinder (5). A plurality of lifting rings (6) for connecting with the lifting cable (7) are also installed on the top annular plate (8).

2. The offshore jacket leveling adjustment device as described in claim 1, characterized in that: A central reinforcing annular plate (2) is welded and installed in the middle of the outer wall of the sleeve (1), and a bottom reinforcing annular plate (3) is welded and installed at the bottom of the outer wall of the sleeve (1). Each clamping hydraulic cylinder (4) is located between the central reinforcing annular plate (2) and the bottom reinforcing annular plate (3).

3. The offshore jacket leveling adjustment device as described in claim 2, characterized in that: The clamping hydraulic cylinders (4) are arranged at equal angles along the circumference, with a quantity of 4 to 8; the jacking hydraulic cylinders (5) are arranged at equal angles along the circumference, with a quantity of 3 to 6.

4. The offshore jacket leveling adjustment device as described in claim 3, characterized in that: Multiple side guide sleeves (13) are installed in the middle of the side wall of the sleeve (1), and the piston rods of each clamping hydraulic cylinder (4) are located in each side guide sleeve (13); multiple top guide sleeves (12) are installed on the top annular plate (8), and the piston rods of each jacking hydraulic cylinder (5) are located in each top guide sleeve (12).

5. The offshore jacket leveling adjustment device as described in claim 4, characterized in that: The lifting rings (6) are arranged at equal angles along the circumference, with a quantity of 3 to 6.

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