Three-cylinder suction anchor

Abstract

The utility model discloses a three-cylinder suction anchor which comprises a main cylinder assembly, two side cylinder assemblies and a penetration pipe system assembly, the side cylinder assemblies are symmetrically welded to the two sides of a main cylinder body of the main cylinder assembly, and the penetration pipe system assembly is composed of a pump skid base plate and a water pipe assembly. And four branches of the water pipe assembly are respectively welded with a side cylinder body of the side cylinder assembly and a main cylinder body of the main cylinder assembly. The two side barrels are additionally arranged on the two sides of the barrel type suction anchor, the bearing capacity of the suction anchor is improved, the sectional area in the direction perpendicular to the anchor chain is increased, the bearing capacity is improved, and the weight of a single-barrel suction anchor with the same sectional area is greatly reduced; the two side cylinders are symmetrical in structure, and the perpendicularity of the suction anchor can be guaranteed in the injection process; the two side cylinders are communicated with the main cylinder through pipelines, the area of top covers of the side cylinders is fully utilized, and larger injection pressure is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of marine engineering construction, in particular to a three-tube suction anchor. Background Art

[0002] Marine development is gradually developing towards the deep sea, and more and more floating platforms and single-point mooring systems are put into use. It is crucial to select a suitable anchor foundation according to different sea conditions, water depths and geological conditions. The main anchor foundation forms include suction anchors, pile anchors, gravity anchors, etc. Traditional gravity anchors and drag anchors have limited practical applications of various mooring systems due to their relatively small grab weight and inability to withstand vertical loads. In addition, the installation process is prone to anchor drag, and the positioning accuracy is low and the safety is poor, so it is difficult to meet deepwater requirements. Pile anchors are widely used in the mooring system of tension leg platforms. However, with the continuous increase in water depth, pile anchors are relatively less used as mooring foundations. The main reason is that the cost of pile hammers and the cost of pile driving operations will increase significantly with the increase in water depth. In addition, the horizontal bearing capacity of pile anchors is much lower than its vertical bearing capacity.

[0003] At present, suction anchors are widely used as deep-sea anchoring foundations. The suction anchor barrel is relatively simple in design, easy to install, and takes a short time to install. However, wind, waves and currents in deep-sea environments will cause the suction anchor to sway and displace horizontally, thereby reducing the bearing capacity of the suction anchor. In areas with soft surface soil, the suction anchor needs to penetrate to a greater depth. At the same time, the soft surface soil is also prone to buckling and deformation when the suction barrel is initially penetrated. At present, with the application of large-megawatt floating wind turbine foundations, the mooring tension is getting larger and larger. For the mooring anchor point of the floating device, the suction anchor mainly bears the horizontal force. For the suction anchor, the cross-sectional area perpendicular to the anchor chain direction determines the horizontal resistance. If the current conventional single suction anchor is used, its size and weight will increase significantly, and the requirements for offshore ship machinery are getting higher and higher, and the cost of offshore construction is high.

[0004] In order to solve the above problems, we proposed a three-tube suction anchor. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a three-tube suction anchor, and the utility model provides the following technical solutions:

[0006] A three-tube suction anchor comprises a main tube assembly, two side tube assemblies and a submerged penetration pipe assembly. The main tube assembly and the side tube assembly are connected to form a cylindrical space respectively, and the three spaces are connected through a penetration pipe.

[0007] The main barrel assembly is composed of a main barrel top cover, a rib plate, a reinforcement ring, a guide sleeve, a main barrel body, a lifting lug, and an inner vertical plate. The main barrel top cover is a steel plate of a certain thickness, with a rib plate on the upper end and a reinforcement ring at the center. Guide sleeves are arranged at the four central corners of the main barrel top cover. The rib plate, reinforcement ring, guide sleeve and main barrel top cover are all welded. The lower part of the main barrel top cover is concentrically arranged with the upper end of the main barrel body and welded as a whole; a lifting lug is welded on the outer wall of the main barrel, which is perpendicular to the double side barrels; an inner vertical plate is welded inside the main barrel body. The side barrel assembly is composed of a side barrel top cover and a side barrel body. There are two side barrel assemblies, which are symmetrically welded on both sides of the main barrel. The lower part of the side barrel top cover is concentrically arranged with the upper end of the side barrel body and welded as a whole. The submerged pipe system assembly consists of a pump skid base plate and a water pipe assembly. The lower part of the base plate is welded to the water pipe assembly. The water pipe assembly includes four branches, two symmetrical branches of which are tees. Two water pipes extend along the upper part of the main tube top cover through a reinforcing ring to the upper part of the double-side tube top covers and penetrate into the double-side tubes for welding and fixation. The other two water pipes and branches vertically penetrate into the main tube top cover to form a radial shape and are welded and fixed to the inside of the main tube.

[0008] Preferably, the guide sleeve is a bell-mouth type steel structure, which facilitates the insertion and alignment of the pump skid legs.

[0009] Preferably, the lifting lug is an ear seat manufactured by cutting a steel plate and is used for hanging an anchor cable.

[0010] Preferably, the inner vertical plate is a hollow rectangular structure cut from a steel plate, the top of the inner vertical plate is welded to the top and bottom of the main cylinder, and the two sides of the inner vertical plate are respectively welded to the inner side walls of the main cylinder.

[0011] Preferably, the side cylinder is a non-closed cylinder structure formed by rolling a steel plate, and is welded and sealed to the main cylinder at both edges.

[0012] Preferably, the pump skid base plate is a square base plate with holes and is provided with a pump skid interface.

[0013] Preferably, the four branches of the water pipe assembly are provided with a plurality of water outlets capable of realizing multi-point suction and spraying.

[0014] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0015] 1. Add two side cylinders on both sides of the cylinder-type suction anchor to improve the bearing capacity of the suction anchor. The cross-sectional area in the direction perpendicular to the anchor chain is increased, the bearing capacity is improved, and the weight of a single-cylinder suction anchor with the same cross-sectional area is greatly reduced.

[0016] 2. The double-sided tube structure is symmetrical, which can ensure the verticality of the suction anchor during the penetration process.

[0017] 3. The two side tubes are connected to the main tube through pipelines, making full use of the top cover area of ​​the side tubes to provide greater penetration pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used to illustrate the purpose of the preferred embodiment and are not considered to be limitations of the present invention. In the entire drawings, the same reference numerals are used to represent the same parts.

[0019] In the attached picture:

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the top structure of the utility model;

[0022] Figure 3 This is a perspective view of the internal structure of the utility model;

[0023] Figure 4 This is the pipeline diagram of the utility model.

[0024] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the components is as follows:

[0025] 1. Main cylinder top cover; 2. Rib plate; 3. Reinforcement ring; 4. Guide sleeve; 5. Main cylinder body; 6. Lifting ear; 7. Inner vertical plate; 21. Side cylinder top cover; 22. Side cylinder body; 31. Pump skid base plate; 32. Water pipe assembly. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Combine the following Figures 1 to 4 A three-tube suction anchor according to an embodiment of the utility model is described in detail.

[0029] like Figures 1 to 4 As shown, a double-side tube suction anchor includes a main tube assembly, a side tube assembly, and a sinking system assembly. The main tube assembly is composed of a main tube top cover 1, a rib plate 2, a reinforcement ring 3, a guide sleeve 4, a main tube body 5, a lifting ear 6, and an inner vertical plate 7. The main barrel top cover 1 is a steel plate of a certain thickness, with annular radial and cross-shaped ribs 2 welded on the upper end; a reinforcing ring 3 is provided at the center, which is a rolled short section of steel pipe and welded to the top cover 1; trumpet-shaped guide sleeves 4 are arranged at the four central corners of the main barrel top cover 1, which are used for the insertion and installation of the pump skid legs so that the pump skid is close to the pump skid base plate 31; the lower part of the main barrel top cover 1 is concentrically arranged with the upper end of the main barrel body 5 and welded as a whole; a lifting ear 6 is welded on the outer wall of the main barrel body 5, and the lifting ear 6 is an ear seat made by cutting steel plates, which is used for anchor cable hanging and is perpendicular to the double-sided barrel assembly; an inner vertical plate 7 is welded inside the main barrel body 5, and the top of the inner vertical plate 7 is welded to the bottom end of the top of the main barrel body 5, and the two sides of the inner vertical plate 7 are respectively welded to the inner wall of the main barrel body 1. The side tube assembly is composed of a side tube top cover 21 and a side tube body 22. There are two side tube assemblies, which are symmetrically welded on both sides of the main tube assembly. The side tube body 22 is a non-closed tube structure made of rolled steel plates. The two edges are welded to the main tube body 5 to form a seal. The lower part of the side tube top cover 21 is concentrically arranged with the upper end of the side tube body 22 and welded as a whole. The submerged pipe system assembly is composed of a pump skid base plate 31 and a water pipe assembly 32. The pump skid base plate 31 is a square bottom plate with holes and is equipped with a pump skid interface. The lower part of the base plate 31 is welded to the water pipe assembly 32. The water pipe assembly 32 penetrates the main tube top cover 1 to form four radial branches and is welded and fixed inside the main tube body 5. Two symmetrical branch pipelines are connected to a tee at the upper part of the main tube top cover 1, pass through the reinforcement ring 3, extend to the upper part of the side tube top cover 21, and penetrate into the side tube body 22 for welding and fixing. The four branches of the water pipe assembly 32 are provided with multiple water inlets that can realize multi-point suction and spraying.

[0030] Specific implementation steps

[0031] Step 1: After the main tube assembly, side tube assembly and sinking system assembly are completed, they are welded into the designed suction anchor overall structure.

[0032] Step 2: After arriving at the construction site, connect the mooring anchor cable connected to the suction anchor to the lifting lug 6, place the pump skid on the pump skid base plate 31, align the equipment legs with the guide sleeve 4, and complete the equipment installation.

[0033] Step 3: After the connection and installation are completed, the suction anchor is hung with a floating hook and launched as a whole. After reaching the set position on the seabed, the suction anchor reenters the mud by itself. The pump skid is started to suck the suction anchor into the water under negative pressure. The cylinders on both sides are connected to the main cylinder through pipelines, making full use of the top cover area of ​​the side cylinders to increase the penetration depth and ensure the verticality of the suction anchor penetration. At the same time, the inner vertical plate 7 inside the main cylinder body 5 is conducive to protecting the suction anchor from deformation during the penetration process; continue to penetrate to the designed depth and stop, reclaim the pump skid, and the installation is completed.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

Claims

1. A three-tube suction anchor, comprising a main tube assembly, two side tube assemblies and a submerged pipe assembly, characterized in that: The main barrel assembly is composed of a main barrel top cover (1), a rib plate (2), a reinforcement ring (3), a guide sleeve (4), a main barrel body (5), a lifting lug (6), and an inner vertical plate (7). The main barrel top cover (1) is a steel plate of a certain thickness, with the rib plate (2) arranged at the upper end, the reinforcement ring (3) arranged at the center, and the guide sleeves (4) arranged at the four central corners. The lower end of the main barrel top cover (1) is concentrically arranged with the upper end of the main barrel body (5) and welded together. The lifting lug (6) is welded to the outer wall of the main barrel body (5), and the inner vertical plate (7) is welded inside the main barrel body (5); The side cylinder assembly is composed of a side cylinder top cover (21) and a side cylinder body (22). There are two side cylinder assemblies, which are symmetrically welded on both sides of the main cylinder body (5). The lower part of the side cylinder top cover (21) is concentrically arranged with the upper end of the side cylinder body (22) and welded together. The submerged pipe system assembly is composed of a pump skid base plate (31) and a water pipe assembly (32). The lower part of the pump skid base plate (31) is welded to the water pipe assembly (32). The water pipe assembly (32) comprises four branches, two symmetrical branches of which are tees. Two water pipes extend along the upper part of the main cylinder top cover (1) through the reinforcement ring (3) to the upper parts of the side cylinder top covers (21) on both sides and penetrate into the side cylinder bodies (22) on both sides and are fixed by welding. The other two water pipes and branches vertically penetrate into the main cylinder top cover (1) to form a radial shape and are fixed by welding to the inside of the main cylinder body (5).

2. A three-tube suction anchor according to claim 1, characterized in that: The guide sleeve (4) is a bell-mouth type steel structure, which facilitates the insertion and alignment of the pump skid legs.

3. A three-tube suction anchor according to claim 1, characterized in that: The lifting lug (6) is an ear seat manufactured by cutting a steel plate and is used for hanging an anchor cable.

4. A three-tube suction anchor according to claim 1, characterized in that: The inner vertical plate (7) is a hollow rectangular structure cut from a steel plate, the top of the inner vertical plate (7) is welded to the top and bottom of the main cylinder (5), and the two sides of the inner vertical plate (7) are respectively welded to the inner side walls of the main cylinder (5).

5. A three-tube suction anchor according to claim 1, characterized in that: The side cylinder (22) is a non-closed cylinder structure formed by rolling a steel plate, and its two edges are welded and sealed to the main cylinder.

6. A three-tube suction anchor according to claim 1, characterized in that: The pump skid base plate (31) is a square base plate with holes and is provided with a pump skid interface.

7. A three-tube suction anchor according to claim 1, characterized in that: The four branches of the water pipe assembly (32) are provided with a plurality of water outlets capable of realizing multi-point suction and spraying.

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