Pile leg inertia reduction device for offshore platform and offshore platform

Abstract

The present invention provides a pile leg inertia reduction device for an offshore platform and an offshore platform. The pile leg inertia reduction device includes a connecting cross brace, a connecting column and a vibration reduction component, wherein the connecting cross brace is fixedly connected between adjacent pile legs, the connecting column is fixedly connected between the connecting cross brace and the platform body of the offshore platform, the connecting cross brace and the connecting column each include a plurality of telescopically connected split blocks, and the vibration reduction component is provided between each split block or between some of the split blocks. The offshore platform includes a platform body, four pile legs provided at the four corners of the platform body, four pile fixing chambers provided at the connection positions between the platform body and the pile legs, and the pile leg inertia reduction device described above, the four groups of the inertia reduction devices are provided between adjacent pile legs and above the pile fixing chambers. The present invention has the advantages of reducing pile leg sway and stress concentration in the pile fixing chamber, and ensuring the safety of the offshore platform.

Description

Technical Field

[0001] The present invention relates to the field of marine engineering, and in particular to a pile leg inertia reduction device for an offshore platform and the offshore platform. Background Art

[0002] During the operation of an offshore platform, the pile legs are an important component of the offshore platform, used to support the weight of the upper hull and withstand environmental loads such as wind, waves, and currents. When the wind and waves at sea are very strong, a large inertial force will be generated regardless of whether the offshore platform is in towing or standing conditions. The inertial force of the pile legs is the largest among all parts of the offshore platform. Specifically, in the towing condition, the inertial force of the pile legs will cause the offshore platform to roll or pitch, and the local stress at the connection between the pile chamber and the pile legs will increase, making the pile chamber prone to cracking or breaking during use, and the overall structural stability is low. At the same time, in the standing condition, the inertial force of the pile legs will also increase the pressure of some pile legs on the ground, which is not conducive to the bearing capacity of the foundation, and is likely to cause damage to related structures, resulting in low safety. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a pile leg inertia reduction device for an offshore platform and an offshore platform, which can reduce pile leg swing and stress concentration in the pile fixing chamber and ensure the safety of the offshore platform.

[0004] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0005] A pile leg inertia reduction device for an offshore platform comprises a connecting cross brace, a connecting column and a vibration-damping component, wherein the connecting cross brace is fixedly connected between adjacent pile legs, and the connecting column is fixedly connected between the connecting cross brace and the platform body of the offshore platform. The connecting cross brace and the connecting column each comprise a plurality of telescopically connected split blocks, and the vibration-damping component is provided between each of the split blocks or between some of the split blocks.

[0006] As a further improvement of the above technical solution:

[0007] The vibration-damping component includes a vibration-damping spring and a reinforcing spring. The vibration-damping spring is arranged in the middle section of the connecting cross brace and the connecting column, and the reinforcing spring is arranged between the split block close to the pile leg and the adjacent split block.

[0008] Adjacent split blocks are telescopically connected via threads.

[0009] The two ends of the connecting cross brace are fixedly connected between the adjacent pile legs through a cross brace fixing piece.

[0010] The cross brace fixing piece is a fixing rope or a fixing buckle.

[0011] The connecting column is fixedly mounted on the platform body of the offshore platform via a mounting base, and base reinforcement ribs are provided on the outer periphery of the mounting base.

[0012] The connecting column is arranged at the center of the connecting cross brace.

[0013] The connecting column and the connecting cross brace are connected by a bolt, one end of the bolt is pressed on the connecting cross brace, and the other end is fastened to the connecting column.

[0014] The platform body of the offshore platform is provided with a lift for operators to install the inertia reduction device conveniently.

[0015] An offshore platform comprises a platform body, four pile legs arranged at the four corners of the platform body, and four pile fixing chambers arranged at the connection positions between the platform body and the pile legs. The platform also comprises four sets of pile leg inertia reduction devices for offshore platforms as described above, wherein the four sets of inertia reduction devices are arranged between adjacent pile legs and above the pile fixing chambers.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The present invention provides connecting cross braces between adjacent pile legs and connecting columns between the connecting cross braces and the platform body of the offshore platform, so as to add a temporary support structure for the pile legs in adverse weather environments. This restricts the swaying of each pile leg and partially disperses the inertial force of the pile leg to the platform body, effectively improving the strength of the pile leg lifting structure, reducing or eliminating the occurrence of pile leg swaying and local stress concentration in the pile fixing chamber, and improving the bearing capacity of the foundation.

[0018] Furthermore, both the connecting cross braces and connecting columns consist of multiple telescopically connected segments, enabling the inertia elimination device to adapt to the leg position, resulting in convenient operation and high versatility. Furthermore, vibration damping components are installed between each segment or between some segments, further reducing the leg's swinging inertia.

[0019] As can be seen, the inertia reduction device of the present invention can temporarily reinforce and reduce vibrations on offshore platforms, significantly reducing platform sway and localized stress in the pile chamber, thereby improving the safety and service life of the offshore platform in inclement weather. Furthermore, it has a simple structure, low cost, and does not require additional space. The offshore platform of the present invention also possesses the aforementioned advantages of the inertia reduction device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0021] Figure 1It is a front view of the pile leg inertia reduction device used for an offshore platform according to the present invention.

[0022] Figure 2 It is a schematic diagram of the positional relationship between the vibration-damping component and the split block of the present invention.

[0023] Figure 3 It is a schematic diagram of the positional relationship between the connecting cross brace and the pile legs of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the connection position of the connecting cross brace and the connecting column of the present invention.

[0025] Figure 5 Schematic diagram of the offshore platform of the present invention.

[0026] The numbers in the figure represent:

[0027] 1. Connecting cross braces; 2. Connecting columns; 3. Vibration-damping components; 31. Vibration-damping springs; 32. Strengthening springs; 4. Offshore platform; 41. Pile legs; 42. Platform body; 43. Pile fixing chamber; 5. Split blocks; 51. Threads; 6. Cross brace fixings; 7. Mounting base; 8. Base reinforcement ribs; 9. Bolts; 10. Lift. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereby.

[0029] Figure 1 An embodiment of the present invention's inertia reduction device for offshore platform legs is shown. This inertia reduction device can be used for newly constructed offshore platforms or for optimizing existing offshore platforms. In this embodiment, the offshore platform leg inertia reduction device includes a connecting cross brace 1, connecting columns 2, and a vibration-damping component 3. The connecting cross brace 1 is fixedly connected between adjacent legs 41, and the connecting columns 2 are fixedly connected between the connecting cross brace 1 and the platform body 42 of the offshore platform 4. Both the connecting cross brace 1 and the connecting columns 2 include multiple sub-blocks 5, with adjacent sub-blocks 5 being telescopically connected. Vibration-damping components 3 are provided between each sub-block 5 or between some of the sub-blocks 5.

[0030] The present invention provides a connecting cross brace 1 between adjacent pile legs 41, and provides a connecting column 2 between the connecting cross brace 1 and the platform body 42 of the offshore platform 4, so as to add a temporary support structure for the pile legs 41 in a harsh weather environment. This restricts the swing of each pile leg 41 and partially disperses the inertial force of the pile leg 41 to the platform body 42, effectively improving the strength of the lifting structure of the pile leg 41, reducing or eliminating the swing of the pile leg 41 and the occurrence of local stress concentration in the pile chamber 43, and improving the bearing capacity of the foundation.

[0031] At the same time, both the connecting cross brace 1 and the connecting column 2 include multiple telescopically connected split blocks 5, which enable the inertia elimination device to adaptively adjust according to the location of the pile legs 41, making it easy to operate and highly versatile. Furthermore, vibration-damping components 3 are provided between each split block 5 or between some of the split blocks 5. The provision of vibration-damping components 3 further reduces the swing inertia force of the pile legs 41. Thus, the inertia elimination device of the present invention can temporarily reinforce and reduce vibration of the offshore platform 4, significantly reducing the swing of the offshore platform 4 and the local stress at the location of the pile chamber 43, thereby improving the safety and service life of the offshore platform 4 in severe weather. Furthermore, it has a simple structure, low cost, and does not require unnecessary space.

[0032] like Figure 2 and Figure 3 As shown, the vibration-damping component 3 includes a vibration-damping spring 31 and a reinforcing spring 32. The vibration-damping spring 31 is located in the middle section connecting the cross brace 1 and the connecting column 2, while the reinforcing spring 32 is located between the split block 5 near the pile leg 41 and the adjacent split block 5. The provision of the vibration-damping spring 31 and the reinforcing spring 32 further reduces the rocking inertia force at the pile leg 41, ensuring the safety of the offshore platform 4 in harsh environments.

[0033] Furthermore, adjacent sub-blocks 5 are telescopically connected via threads 51. This allows the lengths of the connecting cross braces 1 and the connecting columns 2 to be adjustable to suit the installation requirements of different offshore platform legs 41. It has a simple structure, strong versatility, and is easy to operate.

[0034] like Figure 1 and Figure 3 As shown, the two ends of the connecting cross brace 1 are fixedly connected between adjacent legs 41 via a cross brace fixing member 6 to ensure the inertia reduction effect of the leg inertia reduction device. In this embodiment, the cross brace fixing member 6 is a fixed rope wrapped around the outer periphery of the leg 41. Its easy installation and removal allows the inertia reduction device to be used flexibly in harsh environments without affecting the normal operation of the offshore platform 4. In other embodiments, the cross brace fixing member 6 can also be a fixed buckle, with a fixed buckle sleeved around the outer periphery of the leg 41.

[0035] In this embodiment, the split block 5 disposed near the pile leg 41 is an arc-shaped split block, which is adapted to the pile leg 41, and one side of the cross brace fixing member 6 is located in the arc-shaped groove of the arc-shaped split block to ensure reliable fixation of the connecting cross brace 1.

[0036] like Figure 1 As shown, the connecting column 2 is located at the center of the connecting cross brace 1. The connecting column 2 is fixedly mounted on the platform body 42 of the offshore platform 4 via a mounting base 7, which ensures that the connecting column 2 is securely mounted. At the same time, the outer periphery of the mounting base 7 is provided with base reinforcement ribs 8 to ensure that the inertia reduction device has sufficient support strength.

[0037] like Figure 4 As shown, the connecting column 2 and the connecting cross brace 1 are connected by a bolt 9, one end of which is pressed on the connecting cross brace 1 and the other end is fastened to the connecting column 2. This ensures that the connecting column 2 and the connecting cross brace 1 are reliably connected, thereby ensuring the effect of reducing the sway of the pile leg 41.

[0038] Furthermore, the platform body 42 of the offshore platform 4 is provided with a lift 10 to facilitate operators to install the inertia reduction device.

[0039] In this embodiment, the specific operation method of the pile leg inertia reduction device for the offshore platform is as follows: 1) When the weather is bad, the wind and waves are strong, and the pile leg 41 is no longer raised or lowered, the inertia reduction device is installed, and the connecting cross brace 1 and the pile leg 41 are fixed at a preset height using the elevator 10; 2) the connecting cross brace 1 and the connecting column 2 are fixedly connected according to the fixed height of the connecting cross brace 1, and the connecting column 2 is installed on the mounting base 7 of the platform body 42, so as to achieve the effect of reducing the inertia force of the pile leg 41; 3) when the pile leg 41 needs to be raised or lowered or the weather is no longer bad, the inertia reduction device can be disassembled and stored for easy use next time.

[0040] like Figure 1 and 5 As shown, the offshore platform of this embodiment includes a platform body 42, four legs 41, a pile chamber 43, and four sets of leg inertia reduction devices, as described in the previous embodiment. The four legs 41 are located at the four corners of the platform body 42; the four pile chambers 43 are located at the connection points between the platform body 42 and the legs 41; and the four sets of inertia reduction devices are located between adjacent legs 41 and above the pile chambers 43. The offshore platform 4 of the present invention also possesses the aforementioned advantages of the leg inertia reduction devices.

[0041] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A pile leg inertia reduction device for an offshore platform, characterized in that: include: A connecting cross brace, the connecting cross brace being located on the platform body, and the two ends of the connecting cross brace being detachably fixedly connected between adjacent pile legs via a cross brace fixing member; A connecting column, wherein the connecting column is fixedly connected between the connecting cross brace and the platform body of the offshore platform; and Vibration-damping components; Wherein, the connecting cross brace and the connecting column each include a plurality of telescopically connected split blocks, and the vibration-damping component is provided between each split block or between some of the split blocks; The pile leg inertia reduction device can add a temporary support structure for the pile legs.

2. The inertia reduction device for pile legs of an offshore platform according to claim 1, characterized in that: The vibration-damping component includes a vibration-damping spring and a reinforcing spring. The vibration-damping spring is arranged in the middle section of the connecting cross brace and the connecting column, and the reinforcing spring is arranged between the split block close to the pile leg and the adjacent split block.

3. The inertia reduction device for pile legs of an offshore platform according to claim 1, characterized in that: Adjacent split blocks are telescopically connected via threads.

4. The pile leg inertia reduction device for an offshore platform according to claim 1, characterized in that: The cross brace fixing piece is a fixing rope or a fixing buckle.

5. The leg inertia reduction device for an offshore platform according to any one of claims 1 to 4, characterized in that: The connecting column is fixedly mounted on the platform body of the offshore platform via a mounting base, and base reinforcement ribs are provided on the outer periphery of the mounting base.

6. The leg inertia reduction device for an offshore platform according to any one of claims 1 to 4, characterized in that: The connecting column is arranged at the center of the connecting cross brace.

7. The leg inertia reduction device for an offshore platform according to claim 6, characterized in that: The connecting column and the connecting cross brace are connected by a bolt, one end of the bolt is pressed on the connecting cross brace, and the other end is fastened to the connecting column.

8. The leg inertia reduction device for an offshore platform according to any one of claims 1 to 4, characterized in that: The platform body of the offshore platform is provided with a lift for operators to install the inertia reduction device conveniently.

9. An offshore platform comprising a platform body, four pile legs arranged at the four corners of the platform body, and four pile fixing chambers arranged at the connection positions between the platform body and the pile legs, characterized in that: It also includes four groups of pile leg inertia reduction devices for offshore platforms according to any one of claims 1 to 8, and the four groups of inertia reduction devices are respectively arranged between adjacent pile legs and located above the pile fixing chamber.

Images