Suction anchor structure

Abstract

The invention relates to a suction anchor structure. The suction anchor structure comprises a top cover, a barrel, a suction pump, a connecting rod, an abutting plate and a plurality of first lifting lugs. The top cover is detachably arranged at the upper end of the barrel and can be connected with the barrel in a sealed mode, the top cover comprises a top cover shell and a rubber filling piece, and the rubber filling piece is arranged in the top cover shell; the suction pump is arranged on the top cover, an inlet of the suction pump is formed in the barrel, and an outlet of the suction pump is formed outside the barrel, so that negative pressure is formed between the inside of the barrel and the outside; the connecting rod extends in the vertical direction, one end of the connecting rod is connected to the lower surface of the top cover shell, and the other end of the connecting rod is connected to the abutting plate which is used for compacting the soil body. The first lifting lug is arranged on the outer wall of the barrel and used for being connected to a seabed through a mooring chain. Due to the fact that the top cover is detachably arranged at the upper end of the cylinder body, the top cover can be recycled after the suction anchor structure sinks, the bearing performance of the suction anchor structure is guaranteed, and the construction cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of marine engineering, and in particular to a suction anchor structure. Background Art

[0002] Marine engineering anchoring equipment is an important tool for fixing and positioning in marine engineering, and is of great significance to ensure the safety and stability of marine engineering. The research and application of marine engineering anchoring equipment has received extensive attention and attention. At present, many achievements have been made in terms of structural type, mechanical properties, material selection, design and manufacturing, installation technology, etc., but further exploration and research are still needed in the application field to meet the growing demand for marine engineering construction.

[0003] Suction anchors are suitable for deep-water mooring systems as anchoring ends. They are mainly used in clay-type bottoms, but can also be used in fine sand or granular layers. They can withstand high horizontal and vertical loads on mooring lines.

[0004] Suction anchors must be specially designed according to the bottom conditions. They are complex to construct and expensive to install. The installation and removal of submersible pumps require the assistance of divers or submersibles. They are usually used in permanent mooring systems.

[0005] Among the related technologies, with the development of wind energy, offshore wind power has gradually shifted to the deep sea, and floating foundations have received more attention due to their less restricted characteristics by water depth. The selection of their anchoring foundations buried in the seabed is also crucial.

[0006] In recent years, suction anchors have been increasingly used as the anchoring foundation of mooring systems. Traditional suction anchors are mostly integrated cylindrical structures that are closed at the top and open at the bottom. After installation, the top cover of the cylinder is often not reclaimed. If the top cover is reclaimed after installation, the construction cost will be greatly reduced. Summary of the invention

[0007] The purpose of the present disclosure is to provide a suction anchor structure to solve the technical problems existing in the related art.

[0008] In order to achieve the above-mentioned object, the present disclosure provides a suction anchor structure, which includes a top cover, a cylinder, a suction pump, a connecting rod, a pressure plate and a plurality of first lifting ears; The top cover is detachably arranged on the upper end of the cylinder and can be sealed and connected with the cylinder, and the top cover comprises a top cover shell and a rubber filling piece, and the rubber filling piece is arranged in the top cover shell; The suction pump is arranged on the top cover, and the inlet of the suction pump is arranged in the cylinder, and the outlet of the suction pump is arranged outside the cylinder, so as to form a negative pressure between the cylinder and the outside; The connecting rod extends in the up-down direction and one end is connected to the lower surface of the top cover shell, and the other end is connected to the pressure plate, and the pressure plate is used to compact the soil; The first lifting lug is arranged on the outer wall of the cylinder and is used to be connected to the seabed through a mooring chain.

[0009] Optionally, the cylinder includes a cylinder body, a pressure net and a plurality of inner partition plates. The inner partition plate is arranged in the barrel body and extends in the up-down direction. In the radial direction of the barrel body, both sides of the inner partition plate are connected to the inner wall of the barrel body. A plurality of the inner partition plates are staggered and connected to each other in the barrel body. The pressing net is flatly arranged in the barrel body along the radial direction of the barrel body, and the pressing net is connected to the inner wall of the barrel body and is located in the upper area of ​​the barrel body.

[0010] Optionally, the cylinder further includes an annular plate, a plate anchor plate and a plurality of second lifting ears. The annular plate is arranged around the upper edge of the barrel body, and the annular plate protrudes from the outer wall of the barrel body in the radial direction of the barrel body, and a plurality of the second lifting ears are arranged on the upper surface of the annular plate; The plate anchor plate is protrudingly connected to the outer wall of the barrel body in the radial direction of the barrel body, and the plate anchor plate extends in the up-down direction and the upper end is connected to the lower surface of the annular plate.

[0011] Optionally, the plate anchor plate comprises a first plate body and a second plate body connected to each other, the first plate body is connected to the annular plate and the outer side wall of the barrel body, and the second plate body is connected to the lower wall of the barrel body; The cylinder body further comprises a plate anchor support plate, which is arranged along the radial direction of the cylinder body and connects the lower wall of the cylinder body and the second plate body.

[0012] Optionally, the inner partition plate is made of steel plate.

[0013] Optionally, the barrel body is constructed as an integrally formed structure, and the inner partition plate is welded to the barrel body; or, the barrel body and the inner partition plate are integrally formed.

[0014] Optionally, the suction anchor structure further includes a plurality of clamping assemblies, the clamping assemblies including a first clamping member and a second clamping member that can be clamped to and separated from each other, the first clamping member is arranged on the top cover, and the second clamping member is arranged on the cylinder.

[0015] Optionally, the first clamping member includes a clamping seat and a buckle, and the buckle is rotatably arranged on the clamping seat; the second clamping member includes a clamping block, and the buckle can be detachably buckled on the clamping block.

[0016] Optionally, the pressure plate is configured as a circular iron plate, and the circular iron plate extends in a horizontal direction.

[0017] Optionally, the connecting rod is constructed as a steel pipe, one end of the steel pipe is welded to the lower surface of the top cover shell, and the other end of the steel pipe is welded to the circular iron plate.

[0018] In the above technical scheme, firstly, by filling the rubber filling piece in the top cover shell, it can be closely fitted with the cylinder to form a sealing structure and be installed in an integrated manner, thereby reducing the difficulty of construction; secondly, because the top cover is detachably arranged at the upper end of the cylinder, when the suction anchor structure is completely sunk, the top cover can be recycled, which not only ensures the bearing performance of the suction anchor structure, but also reduces the construction cost. The top cover can be recycled many times, thereby reducing the cost. In addition, during the sinking process of the suction anchor structure, the soil is continuously compacted through the pressure plate connected to the top cover. The setting of the pressure plate greatly reduces the possibility of soil loss caused by the seepage channel formed by the pump port, thereby enhancing the bearing performance of the structure. In addition, the presence of multiple first lifting ears enables the suction anchor structure to adopt different connection methods according to the sea conditions during construction and installation, forming different forms of suction anchor groups, enhancing the ability of the suction anchor foundation to resist harsh environments, improving the stability of the suction anchor foundation, and complying with the current development needs of offshore wind farm construction.

[0019] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a suction anchor structure according to an embodiment of the present disclosure.

[0021] Figure 2 and Figure 3 It is a partial structural schematic diagram of a suction anchor structure according to an embodiment of the present invention.

[0022] Description of Reference Numerals 1. Top cover; 11. Top cover housing; 2. Cylinder; 21. Cylinder body; 23. Annular plate; 24. Plate anchor plate; 241. First plate body; 242. Second plate body; 25. Second lifting lug; 26. Plate anchor support plate; 27. Second support plate; 3. Suction pump; 4. Connecting rod; 5. Pressure plate. DETAILED DESCRIPTION

[0023] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0024] Reference Figures 1 to 3 As shown, the present disclosure provides a suction anchor structure, which includes a top cover 1, a cylinder 2, a suction pump 3, a connecting rod 4, a pressure plate 5 and a plurality of first lifting ears. The top cover 1 is detachably arranged on the upper end of the cylinder 2 and can be sealed and connected with the cylinder 2, and the top cover 1 includes a top cover shell 11 and a rubber filler (not shown), and the rubber filler is arranged in the top cover shell 11. The suction pump 3 is arranged on the top cover 1, and the inlet of the suction pump 3 is arranged in the cylinder 2, and the outlet of the suction pump 3 is arranged outside the cylinder 2, so as to form a negative pressure in the cylinder 2 and the outside. The connecting rod 4 extends in the up-down direction and one end is connected to the lower surface of the top cover shell 11, and the other end is connected to the pressure plate 5, and the pressure plate 5 is used to compact the soil; the first lifting ear is arranged on the outer wall of the cylinder 2 and is used to be connected to the seabed through a mooring chain.

[0025] In the above technical scheme, firstly, by filling the rubber filling piece in the top cover shell 11, it can be closely fitted with the cylinder 2 to form a sealing structure and be installed in an integrated manner, thereby reducing the difficulty of construction; secondly, because the top cover 1 is detachably arranged at the upper end of the cylinder 2, when the suction anchor structure is completely sunk, the top cover 1 can be recycled, which not only ensures the bearing performance of the suction anchor structure, but also reduces the construction cost. The top cover 1 can be recycled many times to reduce the cost. In addition, during the sinking process of the suction anchor structure, the soil is continuously compacted through the pressure plate 5 connected to the top cover 1. The setting of the pressure plate 5 greatly reduces the possibility of soil loss caused by the seepage channel formed by the pump port, thereby enhancing the bearing performance of the structure. In addition, the presence of multiple first lifting ears enables the suction anchor structure to adopt different connection methods according to the sea conditions during construction and installation, forming different forms of suction anchor groups, enhancing the ability of the suction anchor foundation to resist harsh environments, improving the stability of the suction anchor foundation, and complying with the current development needs of offshore wind farm construction.

[0026] Optionally, refer to Figures 1 to 3As shown, the barrel 2 includes a barrel body 21, a pressure net (not shown) and a plurality of inner partition plates (not shown), the inner partition plates are arranged in the barrel body 21 and extend in the up and down directions, in the radial direction of the barrel body 21, both sides of the inner partition plates are connected to the inner wall of the barrel body 21, and the plurality of inner partition plates are staggered and interconnected in the barrel body 21; the pressure net is flatly arranged in the barrel body 21 along the radial direction of the barrel body 21, and the pressure net is connected to the inner wall of the barrel body 21 and is located in the upper area of ​​the barrel body 21.

[0027] In this embodiment, firstly, the pressure net continuously compacts the soil during the sinking process of the suction anchor structure to prevent soil loss due to the seepage channel; in addition, the existence of the inner partition plate increases the contact area of ​​the cylinder 2, and also improves the flow resistance, bearing capacity and anti-overturning ability of the suction anchor structure, while increasing the torsion resistance of the suction anchor structure during the sinking installation process and on-site operation, thereby improving the possibility of completing the installation and normal operation of the suction anchor structure at the designed predetermined position.

[0028] In one embodiment, referring to Figure 1 As shown, the barrel 2 further includes an annular plate 23, a plate anchor plate 24 and a plurality of second lifting ears 25. The annular plate 23 is arranged around the upper edge of the barrel body 21, and the annular plate 23 protrudes from the outer wall of the barrel body 21 in the radial direction of the barrel body 21, and a plurality of second lifting ears 25 are arranged on the upper surface of the annular plate 23; the plate anchor plate 24 is protrudingly connected to the outer wall of the barrel body 21 in the radial direction of the barrel body 21, and the plate anchor plate 24 extends in the up-down direction and the upper end is connected to the lower surface of the annular plate 23.

[0029] In this embodiment, an anti-scouring annular plate 23 is installed on the top of the suction anchor structure to avoid the scouring of the surrounding soil of the suction anchor structure by the sea current, effectively protect the performance of the suction anchor structure, and greatly reduce the cost of scouring protection measures such as riprap. The provision of multiple second lifting ears 25 facilitates the lifting of the suction anchor structure. Secondly, the plate anchor plate 24 is protrudingly connected to the outer wall of the cylinder body 21 along the radial direction of the cylinder body 21, and the plate anchor plate 24 extends in the up-down direction and the upper end is connected to the lower surface of the annular plate 23, which increases the contact area of ​​the cylinder body 2, and also improves the flow resistance, bearing capacity and anti-overturning capacity of the suction anchor structure. At the same time, it increases the torsion resistance of the suction anchor structure during the sinking installation process and in-situ operation, and improves the possibility of completing the installation and normal operation of the suction anchor structure at the designed predetermined position.

[0030] In another embodiment, referring to Figure 1As shown, the plate anchor plate 24 includes a first plate body 241 and a second plate body 242 connected to each other, the first plate body 241 is connected to the outer side wall of the annular plate 23 and the barrel body 21, and the second plate body 242 is connected to the lower wall of the barrel body 21; the barrel 2 also includes a plate anchor support plate 26, which is arranged along the radial direction of the barrel body 21, and the plate anchor support plate 26 connects the lower wall of the barrel body 21 and the second plate body 242.

[0031] Due to the complex offshore environment, different geological conditions have different impacts on the foundation. Due to the influence of special geology, the suction anchor structure may not be able to reach the design requirement in the mud. The setting of the first plate body 241, the second plate body 242 and the plate anchor support plate 26 can effectively increase the bearing capacity and horizontal anti-overturning effect.

[0032] In addition, the barrel 2 further comprises a second support plate 27, which is arranged radially along the barrel body 21, and connects the outer wall of the barrel body 21 and the lower surface of the annular plate 23 to improve the structural strength.

[0033] Optionally, the inner partition plate can be constructed of a steel plate, but the present disclosure does not limit the specific material of the inner partition plate. For example, the barrel body 21 is constructed as an integrally formed structure, and the inner partition plate is welded to the barrel body 21; or, the barrel body 21 and the inner partition plate are integrally formed.

[0034] In one embodiment, the suction anchor structure further includes a plurality of snap-in assemblies, and the snap-in assemblies include a first snap-in component and a second snap-in component that can be snapped to each other and can be separated from each other, and the first snap-in component is disposed on the top cover 1, and the second snap-in component is disposed on the cylinder 2, so as to realize a detachable connection between the cylinder 2 and the top cover 1, but the specific connection method is not limited. For example, the first snap-in component includes a socket and a buckle, and the buckle is rotatably disposed on the socket; the second snap-in component includes a block, and the buckle can be detachably buckled on the block. After the suction anchor structure is installed, the first snap-in component and the second snap-in component can be disassembled, and then the interior of the cylinder 2 can be inflated with air or water to release the negative pressure inside and outside the cylinder 2, thereby recovering the top cover 1 and reducing costs.

[0035] In addition, refer to Figure 3 As shown, the pressure plate 5 is constructed as a circular iron plate extending in the horizontal direction, and the connecting rod 4 is constructed as a steel pipe, one end of the steel pipe is welded to the lower surface of the top cover shell 11, and the other end of the steel pipe is welded to the circular iron plate.

[0036] The construction process of the suction anchor structure disclosed in the present invention is as follows: (1) Use a crane to tightly connect the top cover 1 and the cylinder 2 to form a sealed structure. According to the construction sea conditions, select different mooring cable connection methods to connect one end of the mooring cable to the suction anchor structure and the other end to the first lifting device. Connect the assembled suction anchor to the second lifting device through the lifting cable.

[0037] (2) The first lifting device lifts the mooring chain so that the surface of the top cover 1 of the suction anchor structure is in a horizontal state.

[0038] (3) The second lifting device lowers the suction anchor structure at a uniform speed, and the first lifting device drives the mooring chain downward at the same speed. During the sinking process, the pump port of the suction pump 3 is opened to form a seepage channel. At the same time, the soil is continuously compacted by the combined action of the pressure plate 5 and the pressure net to prevent soil loss due to the seepage channel.

[0039] (4) The suction anchor structure sinks to the seabed and gradually penetrates into the seabed. The first lifting device maintains a constant lifting force on the mooring chain until the suction anchor structure sinks to the bottom and the annular plate 23 contacts the seabed. Finally, the top cover 1 is recovered by a crane.

[0040] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0041] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0042] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A suction anchor structure, characterized in that: The suction anchor structure comprises a top cover, a cylinder, a suction pump, a connecting rod, a pressure plate and a plurality of first lifting ears; The top cover is detachably arranged on the upper end of the cylinder and can be sealed and connected with the cylinder, and the top cover comprises a top cover shell and a rubber filling piece, and the rubber filling piece is arranged in the top cover shell; The suction pump is arranged on the top cover, and the inlet of the suction pump is arranged in the cylinder, and the outlet of the suction pump is arranged outside the cylinder, so as to form a negative pressure between the cylinder and the outside; The connecting rod extends in the up-down direction and one end is connected to the lower surface of the top cover shell, and the other end is connected to the pressure plate, and the pressure plate is used to compact the soil; The first lifting lug is arranged on the outer wall of the cylinder and is used to be connected to the seabed through a mooring chain.

2. The suction anchor structure according to claim 1, characterized in that: The cylinder body includes a cylinder body, a pressure-receiving net and a plurality of inner partition plates. The inner partition plate is arranged in the barrel body and extends in the up-down direction. In the radial direction of the barrel body, both sides of the inner partition plate are connected to the inner wall of the barrel body. A plurality of the inner partition plates are staggered and connected to each other in the barrel body. The pressing net is flatly arranged in the barrel body along the radial direction of the barrel body, and the pressing net is connected to the inner wall of the barrel body and is located in the upper area of ​​the barrel body.

3. The suction anchor structure according to claim 2, characterized in that: The cylinder also includes an annular plate, a plate anchor plate and a plurality of second lifting ears. The annular plate is arranged around the upper edge of the barrel body, and the annular plate protrudes from the outer wall of the barrel body in the radial direction of the barrel body, and a plurality of the second lifting ears are arranged on the upper surface of the annular plate; The plate anchor plate is protrudingly connected to the outer wall of the barrel body in the radial direction of the barrel body, and the plate anchor plate extends in the up-down direction and the upper end is connected to the lower surface of the annular plate.

4. The suction anchor structure according to claim 3, characterized in that: The plate anchor plate comprises a first plate body and a second plate body connected to each other, the first plate body is connected to the annular plate and the outer side wall of the barrel body, and the second plate body is connected to the lower wall of the barrel body; The cylinder body further comprises a plate anchor support plate, which is arranged along the radial direction of the cylinder body and connects the lower wall of the cylinder body and the second plate body.

5. The suction anchor structure according to any one of claims 2 to 4, characterized in that: The inner partition plate is made of steel plate.

6. The suction anchor structure according to claim 5, characterized in that: The barrel body is constructed as an integrally formed structure, and the inner partition plate is welded to the barrel body; or, the barrel body and the inner partition plate are integrally formed.

7. The suction anchor structure according to claim 1, characterized in that: The suction anchor structure further includes a plurality of clamping assemblies, wherein the clamping assemblies include a first clamping member and a second clamping member that can be clamped to and separated from each other, wherein the first clamping member is disposed on the top cover, and the second clamping member is disposed on the cylinder.

8. The suction anchor structure according to claim 7, characterized in that: The first clamping member includes a clamping seat and a buckle, and the buckle is rotatably arranged on the clamping seat; the second clamping member includes a clamping block, and the buckle can be detachably buckled on the clamping block.

9. The suction anchor structure according to claim 1, characterized in that: The pressing plate is configured as a circular iron plate, and the circular iron plate extends in a horizontal direction.

10. The suction anchor structure according to claim 9, characterized in that: The connecting rod is constructed as a steel pipe, one end of which is welded to the lower surface of the top cover shell, and the other end of which is welded to the circular iron plate.

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