A rotary anchoring device based on suction barrel foundation penetration

Abstract

The present invention discloses a rotary mooring device based on the penetration of a suction-type barrel foundation, comprising a barrel foundation and an arc plate matched with the outer wall, the barrel foundation is cylindrical, and a pair of rotating shafts are arranged on its outer wall; a pair of sleeves matching the rotating shafts are arranged on the arc plate, and a mooring hole is arranged near the lower part of the arc plate; a circular ring plate is connected to the upper part of the arc plate, and a downward anti-rotation plate is arranged at the lower part of the circular ring plate relative to the connected circular arc plate; the arc plate can rotate around the rotating shaft, the height of the arc plate is higher than the barrel foundation, and the two ends of the arc plate respectively exceed the upper and lower end surfaces of the barrel foundation. After the present invention is sunk to the designed depth, the arc plate is rotated relative to the barrel foundation by applying tension to the anchor chain, and the anti-rotation plate will resist the outer wall of the barrel foundation when it rotates to the maximum amplitude, and the anchor chain load action point deviates from the barrel foundation body by a large distance, and the barrel foundation can hold a large volume of seabed soil along the anchor chain direction, thereby greatly improving its pull-out bearing capacity.

Description

Technical Field

[0001] The invention relates to the technical field of anchoring of marine floating platforms or deep-water cages, in particular to a rotary anchoring device based on penetration of a suction-type barrel foundation. Background Art

[0002] The barrel foundation is an inverted large-diameter steel barrel with an open bottom and a closed top. During installation, the barrel is first partially inserted into the soil in the predetermined sea area by relying on its own weight to form a closed space, and then the gas or liquid between the barrel and the soil is extracted to form a pressure difference between the inside and outside of the barrel, and gradually pressed into the seabed to a predetermined depth to complete the installation. At present, the anchor foundations that can be constructed using barrel foundations mainly include: embedded suction anchors and suction embedded plate anchors. However, the pull-out bearing capacity of these two anchors is often limited.

[0003] It can be seen that it is necessary to innovatively design the configuration of the suction penetration anchor foundation based on the barrel foundation so that it has a larger pull-out bearing capacity and is more convenient to construct. Summary of the invention

[0004] The purpose of the present invention is to remedy the defects of the prior art and to provide a rotary mooring device based on the penetration of a suction-type barrel foundation, in which the arc plate of the mooring anchor chain can rotate so that the anchor chain load deviates from the barrel foundation body by a large distance. The barrel foundation can hold a large volume of seabed soil along the direction of the anchor chain, thereby greatly improving the pull-out bearing capacity of the barrel foundation.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The rotary anchoring device based on the penetration of the suction barrel foundation is characterized by comprising a barrel foundation and an arc plate matched with the outer wall, the barrel foundation is cylindrical, and a pair of rotating shafts are arranged on both sides of the middle and upper part of the outer wall;

[0007] The two side walls of the arc plate extend in a cone shape toward the barrel base, a pair of sleeves matching the rotating shaft are arranged near the cone tip, and a mooring hole is arranged near the bottom of the arc plate;

[0008] The upper part of the arc plate is connected to a circular ring plate, and the lower part of the circular ring plate is provided with a downward anti-rotation plate at a position opposite to the connected arc plate;

[0009] After the two sleeves of the arc plate are inserted into the two rotating shafts on the barrel foundation, the arc plate can rotate around the rotating shafts. The arc plate is higher than the barrel foundation, and both ends of the arc plate exceed the upper and lower end surfaces of the barrel foundation respectively.

[0010] The rotary anchoring device based on suction-type barrel foundation penetration is characterized in that the inner diameter and outer diameter of the arc plate, annular plate and anti-rotation plate are all equal.

[0011] The rotary anchoring device based on suction-type barrel foundation penetration is characterized in that the outer diameter of the rotary shaft is smaller than the inner diameter of the sleeve.

[0012] The rotary anchoring device based on suction barrel foundation penetration is characterized in that the inner diameter and outer diameter of the barrel foundation are respectively equal to the inner diameter and outer diameter of the barrel foundation, and the concave arc diameter of the arc plate is larger than the outer diameter of the barrel foundation.

[0013] The rotary mooring device based on suction barrel foundation penetration is characterized in that during construction, the anchor chain is moored to the mooring hole, the barrel foundation is fixedly connected to the lower end of the barrel foundation, and the annular plate is sleeved on the outer circumference of the barrel foundation.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] 1. The circular arc plate, circular ring plate and anti-rotation plate of the present invention are surrounded on the outside of the drum foundation and the barrel foundation during construction. The area in the plumb direction during the sinking process is the cross-sectional area of ​​the circular ring plate. This area is very small, and the resistance generated by the soil is very small. It can be seen that the addition of the circular arc plate, circular ring plate and anti-rotation plate has very little effect on the sinking resistance of the entire device, and is basically the same as the construction of the traditional drum foundation;

[0016] 2. After the barrel foundation of the present invention is sunk to the designed depth, the arc plate is rotated relative to the barrel foundation by applying tension to the anchor chain. When the rotation reaches the maximum amplitude, the anti-rotation plate will abut against the outer wall of the barrel foundation. At this time, the anchor chain load action point deviates from the barrel foundation body by a large distance, and the barrel foundation is in an eccentric tension state. The barrel foundation can hold a large volume of seabed soil along the direction of the anchor chain, thereby greatly improving the pull-out bearing capacity of the barrel foundation;

[0017] 3. The present invention has a simple structure, is easy to manufacture and construct, has a low cost, and can provide greater anchoring force for offshore floating platforms, seawater aquaculture cages, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the present invention.

[0019] Figure 2 It is the front view of the present invention.

[0020] Figure 3 A three-dimensional schematic diagram of the present invention Figure 1 .

[0021] Figure 4 A three-dimensional schematic diagram of the present invention Figure 2 .

[0022] Figure 5 It is a three-dimensional schematic diagram of the arc plate structure of the present invention.

[0023] Figure 6 It is a three-dimensional schematic diagram of the drum foundation of the present invention.

[0024] Figure 7 It is a schematic diagram of the drum base of the present invention being rotated by a certain angle.

[0025] Figure 8 It is a schematic diagram of the present invention relying on the gravity of the barrel foundation to sink and contact the seabed during construction.

[0026] Fig. 9 It is a cross-sectional schematic diagram of the present invention after being assembled with a barrel foundation during construction.

[0027] Fig.10 This is a schematic diagram of the present invention based on the barrel foundation penetrating into the seabed.

[0028] Fig.11 This is a schematic diagram of the posture after the bucket foundation of the present invention is removed.

[0029] Fig.12 This is a working state diagram of the present invention.

[0030] Explanation of the accompanying reference numerals: 1. barrel foundation; 2. sleeve; 3. rotating shaft; 4. arc plate; 5. circular ring plate; 6. anti-rotation plate; 7. mooring hole; 8. barrel foundation; 9. anchor chain; 10. construction rope; A. seabed surface. DETAILED DESCRIPTION

[0031] See attached picture.

[0032] A rotary mooring device based on suction-type barrel foundation penetration comprises a barrel foundation 1 and an arc plate 4; the barrel foundation 1 is cylindrical, and a pair of rotating shafts 3 are arranged on both sides of the upper and middle part of the outer side; the arc plate 4 is an arc-shaped steel plate, and the two side walls of the arc plate extend toward the barrel foundation in a cone shape, and a pair of sleeves matching the rotating shafts are arranged near the cone tip, and a mooring hole 7 is arranged near the lower part of the arc plate 4, and the central angle of the arc plate 4 is between 60° and 180°; a circular ring plate 5 is connected to the upper part of the arc plate 4; an arc-shaped anti-rotation plate 6 is welded to the lower part of the circular ring plate 5 at a position symmetrical to the connection with the arc plate 4; after the arc plate 4 is inserted into the two rotating shafts 3 on the barrel foundation 1 based on two sleeves 2, the arc plate 4 can rotate around the rotating shaft 3.

[0033] The above-mentioned directional words such as "outside", "lower", "upper middle", "both sides", etc. are determined based on the posture of the barrel foundation during construction. Figure 8As shown. The orientation words mentioned elsewhere in the specification are also inferred from this posture. The above orientation or position relationship is based on the orientation or position relationship shown in the drawings, which is only for the convenience and simplification of description, and does not indicate or imply that the device or component referred to must have a specific orientation, structure and operation, and therefore cannot be understood as a limitation of the present invention.

[0034] Figure 1~Figure 4 The structural schematic diagram of the proposed barrel foundation is given.

[0035] The barrel base 1 is cylindrical, and a pair of rotating shafts 3 are arranged on both sides of the upper middle part of the outer side. Figure 6 Preferably, a pair of rotating shafts 3 are located on a diameter of the drum base 7.

[0036] The inner diameter and outer diameter of the arc plate 4, the annular plate 5, and the anti-rotation plate 6 are respectively equal, and the appearance is similar to an "F" shape, and the whole is symmetrical. Figure 5 shown.

[0037] The outer diameter of the rotating shaft 3 is smaller than the inner diameter of the sleeve 2. After the arc plate 4 is inserted into the two rotating shafts 3 on the drum base 1 based on the two sleeves 2, the arc plate 4 can rotate around the rotating shaft 3. Figure 7 When the anti-rotation plate 6 rotates to the maximum extent, it will abut against the outer wall of the drum base 1, so the rotation extent of the arc plate 4 can be adjusted by changing the height of the anti-rotation plate 6.

[0038] The barrel foundation relies on the suction barrel foundation 8 to penetrate the seabed. The inner diameter and outer diameter of the barrel foundation 1 are respectively equal to the inner diameter and outer diameter of the barrel foundation 8 , and the arc diameter of the concave surface of the arc plate 4 is larger than the outer diameter of the barrel foundation 8 .

[0039] During the construction of the barrel foundation, the anchor chain 9 is moored on the mooring hole 7, the barrel foundation 1 is fixedly connected to the lower end of the barrel foundation 8, the annular plate 5 is sleeved around the barrel foundation 8, and the barrel foundation 1 is penetrated to the designed depth of the seabed by relying on the barrel foundation 8, and then the barrel foundation 8 is removed, and the construction of the barrel foundation is completed by applying tension to the anchor chain 9 to the designed value. The assembly of the barrel foundation and the barrel foundation 8 is shown in FIG. Figure 8 shown.

[0040] The barrel foundation, also known as the suction pile, is an inverted large-diameter steel barrel with an open bottom and a closed top. During installation, the barrel is partially inserted into the soil in the predetermined sea area by relying on its own weight to form a closed space. Then, the gas and liquid between the barrel and the soil are extracted to form a pressure difference between the inside and outside of the barrel, and the barrel is gradually pressed into the predetermined depth in the seabed to complete the installation. The proposed barrel foundation relies on the sinking effect of the suction barrel foundation to press into the seabed to the designed depth.

[0041] The strength of each component should meet the needs of loads under various working conditions, and will not buckle or fail under severe working conditions. A large stress concentration will occur at the rotating shaft 3, and auxiliary measures should be taken to strengthen the design of the stress concentration parts to avoid large stress concentration at the connection, which will cause buckling and failure.

[0042] The construction process of the present invention is described in detail as follows:

[0043] 1. Assemble the barrel foundation;

[0044] The barrel foundation 1 is fixedly connected to the bottom of the barrel foundation 8, and the annular plate 5 is sleeved around the barrel foundation 8. Figure 8 The connection section of the barrel foundation 1 and the barrel foundation 8 is shown in FIG. Fig. 9 shown.

[0045] 2. The barrel foundation sinks to the seabed by its own weight;

[0046] One end of the anchor chain 9 is moored to the mooring hole 7, and the construction rope 10 is connected to the barrel foundation 8. The barrel foundation 8 is lifted based on the construction rope 10, so that it enters the seawater and is in a plumb state, and the barrel foundation 8 is gradually lowered so that it sinks under its own weight to contact the seabed and is pressed into the seabed to a certain depth, such as Figure 8 shown.

[0047] Usually, the barrel foundation 8 is pressed into the seabed to a certain depth under its own weight, so that the bottom of the barrel foundation 8 is sealed by the seabed soil, forming a closed space inside, which provides the necessary conditions for the subsequent extraction of air to form negative pressure.

[0048] 3. Extract negative pressure to make the barrel foundation penetrate into the seabed to the designed depth;

[0049] The top of the barrel foundation 8 is provided with an inlet and outlet water (gas) valve, and the connecting pipe is fixedly connected to the inlet and outlet water (gas) valve. The air inside the barrel foundation 8 is extracted through the connecting pipe to form an internal and external pressure difference, thereby penetrating the barrel foundation into the seabed soil. Finally, the barrel foundation 1 at the bottom of the barrel foundation is pressed into the seabed soil to the designed depth, such as Fig.10 shown.

[0050] The mentioned arc plate, annular plate and anti-rotation plate are surrounded on the outside of the drum foundation and the barrel foundation during construction. The area in the plumb direction during the penetration process is the cross-sectional area of ​​the annular plate. This area is very small, and the resistance generated by the soil to it is very small. It can be seen that the addition of the arc plate, annular plate and anti-rotation plate has little effect on the penetration resistance of the entire device, and is basically no different from the construction of the traditional drum foundation.

[0051] 4. Remove the barrel foundation;

[0052] After the barrel foundation 8 is pressed into the seabed to the designed depth, the inside of the barrel foundation 8 is inflated through the connecting pipe to make the barrel foundation 8 gradually float up, and finally lift and remove the barrel foundation 8. After the barrel foundation 8 is removed, only the arc plate and the barrel foundation 1 are left in the seabed soil. Fig.11 shown.

[0053] In order to facilitate the separation of the barrel foundation 8 and the arc plate 4 , lubricant may be applied to the inner sides of the arc plate 4 , the annular plate 5 , and the anti-rotation plate 6 .

[0054] 5. Tension the anchor chain to ensure that the barrel foundation meets the design requirements.

[0055] The arc plate 4 is rotated by applying tension to the anchor chain 9 until the tension of the anchor chain 9 reaches the design value, and the construction is completed.

[0056] By applying tension to the anchor chain, the arc plate is caused to rotate relative to the barrel foundation. When it rotates to the maximum extent, the anti-rotation plate will press against the outer wall of the barrel foundation. At this time, the load action point of the anchor chain deviates from the barrel foundation body by a large distance. The barrel foundation is in an eccentric tension state. The barrel foundation can hold a larger volume of seabed soil along the direction of the anchor chain, thereby greatly improving the pull-out bearing capacity of the barrel foundation.

[0057] Fig.12 A possible working state of the proposed barrel foundation is given.

[0058] The proposed barrel foundation with arc plates has a simple structure, is easy to manufacture and construct, has a low cost, and can provide greater mooring force for offshore floating platforms, seawater aquaculture cages, etc.

[0059] The strength of each component and connection should meet the use requirements and should not cause buckling or failure under harsh working conditions.

[0060] The attached drawings only show part of the shape and part of the connection method of the arc plate. According to the proposed ideas, the shape of the arc plate, the mutual connection method, or other auxiliary components can be changed to form other related types of rotating barrel foundations. These are all equivalent modifications and changes of the present technology and will not be repeated here.

[0061] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The same or similar numbers correspond to the same or similar parts. The terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations on this patent.

[0062] The present invention is not limited to the above-mentioned specific implementation modes. According to the above-mentioned contents, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the present invention, the present invention can also make other various forms of equivalent modifications, replacements or changes, all of which fall within the protection scope of the present invention.

Claims

1. A rotary anchoring device based on suction barrel foundation penetration, characterized in that: It includes a barrel base and an arc plate matched with the outer wall, the barrel base is cylindrical, and a pair of rotating shafts are arranged on both sides of the upper middle part of the outer wall; The two side walls of the arc plate extend in a cone shape toward the barrel base, a pair of sleeves matching the rotating shaft are arranged near the cone tip, and a mooring hole is arranged near the bottom of the arc plate; The upper part of the arc plate is connected to a circular ring plate, and the lower part of the circular ring plate is provided with a downward anti-rotation plate at a position opposite to the connected arc plate; After the two sleeves of the arc plate are inserted into the two rotating shafts on the barrel foundation, the arc plate can rotate around the rotating shafts, the arc plate is higher than the barrel foundation, and the two ends of the arc plate exceed the upper and lower end surfaces of the barrel foundation respectively; The inner diameter and outer diameter of the arc plate, the annular plate and the anti-rotation plate are all equal; The outer diameter of the rotating shaft is smaller than the inner diameter of the sleeve.

2. The rotary anchoring device based on suction barrel foundation penetration according to claim 1 is characterized in that: The inner diameter and outer diameter of the barrel foundation are respectively equal to the inner diameter and outer diameter of the barrel-shaped foundation, and the arc diameter of the concave surface of the arc plate is larger than the outer diameter of the barrel-shaped foundation.

3. The rotary anchoring device based on suction barrel foundation penetration according to claim 1 is characterized in that: During construction, the anchor chain is moored on the mooring hole, the barrel foundation is fixedly connected to the lower end of the barrel foundation, and the circular ring plate is sleeved on the outer circumference of the barrel foundation.

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