A method of sinking a suction cylinder based on magnetic force

Abstract

The present application belongs to the field of offshore wind power engineering, and particularly relates to a kind of sinking method of suction cylinder based on magnetic force, comprising: hoisting guide frame to seabed;Put the suction cylinder in the guide frame;Install magnetic propulsion;Pass the current into electromagnet module to make it can generate repulsive force to permanent magnet module, electromagnet module repels permanent magnet module downward, and the suction cylinder is pushed into seabed by permanent magnet module;After sinking, remove magnetic propulsion and guide frame.The present application proposes a kind of sinking method of suction cylinder based on magnetic propulsion, compared with negative pressure sinking method, there is no pressure difference inside and outside the cylinder, when installing, the two sides of suction cylinder will not be subjected to lateral pressure, the cylinder wall is not easy to flex, which provides space for optimizing the thickness of cylinder wall, can further reduce the cost of cylinder structure, and there is no obvious pressure difference between seawater in the cylinder and seabed soil, and soil plug problem is not easy to occur.

Description

Technical Field

[0001] This invention belongs to the field of offshore wind power engineering, specifically relating to a magnetic suction cylinder sinking method. Background Technology

[0002] Suction cylinder foundations, as an excellent foundation type, offer advantages such as easy installation, low cost, and high construction efficiency, and have been applied in the offshore wind power industry, including single-suction cylinder foundations and multi-suction cylinder jacket foundations. A significant characteristic that distinguishes suction cylinder foundations from traditional pile foundations is their reliance on negative pressure for sinking installation. However, precisely because of this unique negative pressure sinking installation method, during installation, due to the lower pressure inside the cylinder compared to the seabed pressure, some soil at the cylinder tip flows into the cylinder, causing contact between the soil inside and the top of the cylinder. This prevents the cylinder foundation from sinking to the designed depth, a problem known as the soil plugging problem.

[0003] Based on this, this application proposes a magnetic suction cylinder sinking method, which uses a magnetic thruster to press the suction cylinder into the seabed instead of reducing the pressure inside the cylinder by a suction pump. This not only improves the equipment's construction capability but also avoids some of the disadvantages of negative pressure sinking methods. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a magnetic suction cylinder sinking method.

[0005] A magnetic suction cylinder penetration method is disclosed, which employs a suction cylinder penetration device. The device includes a guide frame and a magnetic thruster. The magnetic thruster comprises a permanent magnet module and an electromagnet module.

[0006] Step 1: Hoist the guide frame to the seabed;

[0007] Step 2: Place the suction cylinder into the guide frame;

[0008] Step 3, install the magnetic thruster, including: arranging a permanent magnet module at the upper end of the suction cylinder, limiting the electromagnet module by a guide frame, with the electromagnet module located at the upper end of the permanent magnet module;

[0009] Step 4: Pass an electric current through the electromagnet module so that it can generate a repulsive force on the permanent magnet module. The electromagnet module repels the permanent magnet module downwards, and the permanent magnet module pushes the suction cylinder into the seabed.

[0010] Step 5: After the sinking is completed, remove the magnetic thruster and guide frame.

[0011] Further, step 3 specifically includes: passing a current through the electromagnet module to enable it to generate an attractive force on the permanent magnet module, so that the electromagnet module and the permanent magnet module are attracted together; then lifting the magnetic thruster to the upper surface of the suction cylinder; installing the permanent magnet module at the upper end of the suction cylinder; the electromagnet module at the upper end of the permanent magnet module; extending its telescopic legs and inserting them into the corresponding interface of the guide frame, so that the guide frame provides vertical constraint to the electromagnet module.

[0012] Furthermore, in step 4, as the permanent magnet module gradually moves downward with the suction cylinder, the electromagnet module is intermittently de-energized. When the power is de-energized, the electromagnet module loses the repulsive force of the permanent magnet module and, under its own weight, pushes open the corresponding one-way door. The electromagnet module falls into the next interface unit, the one-way door resets, and then current is supplied to the electromagnet module again so that it can generate a repulsive force on the permanent magnet module. The electromagnet module is again subjected to the repulsive force of the permanent magnet module. Under the action of the repulsive force of the permanent magnet module, the electromagnet module presses against the previous one-way door, ensuring that the distance between the electromagnet module and the permanent magnet module is within the effective range.

[0013] Furthermore, step 5 specifically includes: after the penetration is completed, a current is passed through the electromagnet module so that it can generate an attractive force on the permanent magnet module, so that the electromagnet module attracts the permanent magnet module, the magnetic thruster is lifted and removed, and then the guide frame is removed.

[0014] Furthermore, the guide frame is surrounded by several interfaces, and the electromagnet module is surrounded by several telescopic feet. When the telescopic feet are extended, they are inserted into the corresponding interfaces, and when they are shortened, they are disengaged from the corresponding interfaces.

[0015] Furthermore, the telescopic foot is an electromagnetic telescopic structure.

[0016] Furthermore, the interface is a long strip structure with several one-way doors arranged from top to bottom. The one-way doors can only be opened from top to bottom and cannot be opened from bottom to top. The one-way doors divide the interface into multiple interface units, and the telescopic feet of the electromagnet module are inserted into one of the interface units.

[0017] Furthermore, the one-way door is reset via an elastic unit.

[0018] Furthermore, the one-way door is rotatably connected to the interface, and the interface is provided with a stop block for engaging with the one-way door. The stop block ensures that the one-way door can only be opened from top to bottom and cannot be opened from bottom to top. An elastic unit is connected between the stop block and the one-way door.

[0019] Furthermore, the electromagnet module has a star-shaped structure, and the shape and size of the permanent magnet module correspond to it.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1) This invention proposes a magnetically driven suction cylinder sinking method. Compared with the negative pressure sinking method, there is no pressure difference between the inside and outside of the cylinder. During installation, the sides of the suction cylinder will not be subjected to lateral pressure, and the cylinder wall is not easy to buckle. This provides space for optimizing the cylinder wall thickness, which can further reduce the cost of the cylinder structure. In addition, there is no significant pressure difference between the seawater inside the cylinder and the seabed soil, so the soil blockage problem is not easy to occur.

[0022] 2) This invention uses magnetic force to generate thrust, pressing the suction cylinder into the seabed. Compared with suction pumps that use small openings in the cylinder wall to pump water and generate negative pressure, the thrust generated is more uniform, and it is more convenient and faster to adjust the force by electric current. The equipment has higher execution capability, faster response, and is easier to adjust in the face of emergencies.

[0023] 3) Compared to traditional suction pumps, magnetic thrusters only require cable connections instead of umbilical cables, which can reduce structural costs and construction difficulty. Furthermore, the electric system is more reliable underwater than the hydraulic system of suction pumps. Attached Figure Description

[0024] Figure 1 Flowchart for invention;

[0025] Figure 2 This is a schematic diagram of the suction cylinder sinking device of the present invention in use.

[0026] Figure 3 This is a top view schematic diagram of the connection between the electromagnet module and the guide frame in the suction cylinder sinking device of the present invention;

[0027] Figure 4 This is a schematic diagram of the interface structure in the suction cylinder sinking device of the present invention;

[0028] Figure 5 This is a schematic diagram of the process by which the telescopic foot enters the next interface unit in the suction cylinder sinking device of the present invention. Detailed Implementation

[0029] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper side", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0030] The invention will now be further described with reference to the accompanying drawings.

[0031] Please see Figures 1-5A magnetic suction cylinder sinking method is proposed, which is implemented by a suction cylinder sinking device. The suction cylinder sinking device is waterproofed as known. It includes a guide frame 4 and a magnetic thruster. The guide frame 4 provides guidance for the sinking of the suction cylinder 1. The magnetic thruster includes a permanent magnet module 2 and an electromagnet module 3. The permanent magnet module 2 is disposed at the upper end of the suction cylinder 1, and the electromagnet module 3 is confined in the guide frame 4.

[0032] Among them, the electromagnet module 3 can adjust the magnitude and direction of the magnetic force generated by adjusting the direction and magnitude of the current. Under the constraint of the guide frame 4, the electromagnet module 3 can generate a thrust on the permanent magnet module 2, thereby pressing the suction cylinder 1 into the seabed 5.

[0033] The main structure of the guide frame 4 is a technology known in the field.

[0034] Continue reading Figure 3 The electromagnet module 3 has a star-shaped structure, and the permanent magnet module 2 has a corresponding shape and size. Several telescopic feet 31 are evenly distributed around the electromagnet module 3, and several interfaces 40 are evenly distributed around the guide frame 4. When the telescopic feet 31 are extended, they are inserted into the corresponding interfaces 40, and when they are shortened, they are removed from the corresponding interfaces 40.

[0035] The telescopic foot 31 is a known technology, which adopts an electromagnetic telescopic structure. Alternatively, an electric telescopic structure can also be used.

[0036] Continue reading Figure 4 and Figure 5 The interface 40 is a long strip structure with several one-way doors 6 arranged from top to bottom. The one-way doors 6 are double doors, which can only be opened from top to bottom and cannot be opened from bottom to top. The one-way doors 6 divide the interface 40 into multiple interface units 400. The telescopic foot 31 of the electromagnet module 3 is inserted into one of the interface units 400 of the socket 40. The electromagnet module 3 is configured such that when the electromagnet module 3 is de-energized, the electromagnet module 3 falls due to its own weight, and the telescopic foot 31 of the electromagnet module 3 can push open the corresponding one-way door 6 from top to bottom to enter the next interface unit 400.

[0037] Specifically, the one-way door 6 is rotatably connected to the interface 40. The interface 40 is provided with a stop 7 for engaging with the one-way door 6. The stop 7 ensures that the one-way door 6 can only be opened from top to bottom and cannot be opened from bottom to top. An elastic unit is connected between the stop 7 and the one-way door 6. The one-way door 6 is reset through the elastic unit, which is preferably a spring 8.

[0038] The above-mentioned suction cylinder penetration method includes the following steps:

[0039] Step 1: Hoist guide frame 4 to the seabed.

[0040] Step 2: Place the suction cylinder 1 into the guide frame 4. The guide frame 4 generally has a large self-weight and can provide lateral restraint for the suction cylinder 4 to prevent the suction cylinder 1 from tilting.

[0041] Step 3: Adjust the magnetic thruster so that the electromagnet module 3 attracts the permanent magnet module 2, causing them to adhere together. Then, lift the magnetic thruster to the upper surface of the suction cylinder 1. The telescopic feet 31 of the electromagnet module 3 extend and insert into the corresponding interfaces 40, allowing the guide frame 4 to provide vertical constraint to the electromagnet 3. The shape of the magnetic thruster avoids interference with some structures on the upper surface of the suction cylinder 1 and ensures that the thrust it generates is applied more evenly to the upper surface of the suction cylinder 1, thereby avoiding excessive pressure and stress concentration.

[0042] Step 4: Change the current direction of electromagnet module 3 to generate thrust, thereby pressing suction cylinder 1 into the seabed. By adjusting the current, electromagnet module 3 can quickly adjust the thrust magnitude, adjusting the pressure on the cylinder according to its attitude, resulting in more uniform force distribution. For multi-cylinder structures, the rapid thrust adjustment of electromagnet module 3 also enables the synchronous insertion of multiple cylinders, giving the entire system better construction capabilities. Compared to suction pump systems that can only slowly generate negative pressure by drawing seawater from a small opening into the cylinder, this method operates quickly, generates more uniform thrust, better ensures the tilt of the suction cylinder, and has higher reliability.

[0043] During the sinking process of the suction cylinder 1, to prevent the distance between the electromagnet module 3 and the permanent magnet module 2 from increasing, the following operations can be performed: (e.g., ...) Figure 5 As shown, when the permanent magnet module 2 gradually moves down with the suction cylinder 1, the power to the electromagnet module 3 is intermittently cut off. When the power is cut off, the electromagnet module 3 loses the repulsive force of the permanent magnet module 2 and pushes open the corresponding one-way door 6 under its own weight. The electromagnet module 3 falls into the next interface unit 400. The one-way door 6 is reset under the action of the spring 8, and then the power to the electromagnet module 3 is restored. The electromagnet module 3 is once again subjected to the repulsive force of the permanent magnet module 2, so the electromagnet module 3 presses on the previous one-way door 6. This ensures that the distance between the electromagnet module 3 and the permanent magnet module 2 is within the effective range.

[0044] Step 5: After the sinking is completed, the electromagnet module 3 generates an attractive force to hold the permanent magnet module 2, the magnetic thruster is lifted and removed, and then the guide frame 4 is removed to complete the installation.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic suction cylinder sinking method, characterized in that, This suction cylinder penetration method employs a suction cylinder penetration device, which includes a guide frame and a magnetic thruster. The magnetic thruster comprises a permanent magnet module and an electromagnet module. The guide frame is surrounded by several interfaces, and the electromagnet module is surrounded by several telescopic feet. When the telescopic feet extend, they insert into the corresponding interfaces; when they retract, they retract from the corresponding interfaces. Each interface is a long, narrow structure with several one-way doors arranged from top to bottom. These one-way doors can only open from top to bottom, not from bottom to top. The one-way doors divide the interface into multiple upper and lower interface units. The telescopic feet of the electromagnet module are inserted into one of the interface units. The suction cylinder penetration method includes: Step 1: Hoist the guide frame to the seabed; Step 2: Place the suction cylinder into the guide frame; Step 3, install the magnetic thruster, including: arranging a permanent magnet module at the upper end of the suction cylinder, limiting the electromagnet module by a guide frame, with the electromagnet module located at the upper end of the permanent magnet module; Step 4: Pass an electric current through the electromagnet module so that it can generate a repulsive force on the permanent magnet module. The electromagnet module repels the permanent magnet module downwards, and the permanent magnet module pushes the suction cylinder into the seabed. Step 5: After the sinking is completed, remove the magnetic thruster and guide frame.

2. The magnetic suction cylinder penetration method according to claim 1, characterized in that, Step 3 specifically includes: passing an electric current through the electromagnet module so that it can generate an attractive force on the permanent magnet module, so that the electromagnet module and the permanent magnet module are attracted together; then lifting the magnetic thruster to the upper surface of the suction cylinder; installing the permanent magnet module at the upper end of the suction cylinder; the electromagnet module at the upper end of the permanent magnet module; extending its telescopic legs and inserting them into the corresponding interface of the guide frame, so that the guide frame provides vertical constraint to the electromagnet module.

3. The magnetic suction cylinder penetration method according to claim 1, characterized in that, In step 4, as the permanent magnet module gradually moves downward with the suction cylinder, the electromagnet module is intermittently de-energized. When the power is off, the electromagnet module loses the repulsive force of the permanent magnet module and pushes open the corresponding one-way door under its own weight. The electromagnet module falls into the next interface unit, the one-way door resets, and then current is supplied to the electromagnet module again so that it can generate a repulsive force on the permanent magnet module. The electromagnet module is once again subjected to the repulsive force of the permanent magnet module. Under the action of the repulsive force of the permanent magnet module, the electromagnet module presses against the previous one-way door, ensuring that the distance between the electromagnet module and the permanent magnet module is within the effective range.

4. The magnetic suction cylinder sinking method according to claim 1, characterized in that, Step 5 specifically includes: after the sinking is completed, a current is passed through the electromagnet module so that it can generate an attractive force on the permanent magnet module, so that the electromagnet module attracts the permanent magnet module, the magnetic thruster is lifted and removed, and then the guide frame is removed.

5. The magnetic suction cylinder sinking method according to claim 1, characterized in that, The telescopic foot is an electromagnetic telescopic structure.

6. The magnetic suction cylinder penetration method according to claim 1, characterized in that, The one-way door is reset via an elastic unit.

7. The magnetic suction cylinder penetration method according to claim 6, characterized in that, The one-way door is rotatably connected to the interface, and the interface is provided with a stop block for engaging with the one-way door. The stop block ensures that the one-way door can only be opened from top to bottom and cannot be opened from bottom to top. An elastic unit is connected between the stop block and the one-way door.

8. The magnetic suction cylinder penetration method according to claim 1, characterized in that, The electromagnet module has a star-shaped structure, and the permanent magnet module has a corresponding shape and size.

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