A horizontal connection structure for ROV H-LINK anchor chains

Abstract

This invention discloses a horizontal anchor chain connection structure for ROV H-LINK and its usage method, comprising: a base structure with an anchor chain mounting groove on its plate; an opening extending inward from one side of the base structure opposite to the opening of the anchor chain mounting groove; an arched fixing structure on the base structure plate; a first track fixedly connected to one side of the anchor chain mounting groove and a second track fixedly connected to the other side; an anchor chain pin adapted to the first track; a pin push rod passing through two elongated holes; a locking nut adapted to the second track; a pin track fixedly connected to one side of the second track, the pin track being adapted to a small pin; a first buckle and a second buckle on the base structure plate; support columns fixedly connected to the four corners of the base structure; and a base fixedly connected to the bottom of the support columns. This invention can restrict the free sliding of the anchor chain, keeping it in a horizontal position at all times. When connected to the ROV H-LINK during ROV operation, it locks in place, facilitating ROV underwater operations.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and in particular to a horizontal connection structure for ROV H-LINK anchor chains and its usage method. Background Technology

[0002] Currently, anchor chain reconnection is commonly used for the installation, replacement, and maintenance of anchor chains for floating wind turbines in deep-water wind power generation and FPSO mooring in deep-water oilfield development. After the mooring anchor piles are installed, the anchor head chain is generally placed horizontally on the seabed, making it impossible to vertically connect it to the ROV H-LINK on the seabed chain. Existing ROV H-LINK anchor chain connection structures mostly adopt a vertical connection method, that is, using an underwater installation platform to keep the anchor head chain in a vertical state, with the ROV H-LINK pre-installed on the installation fixture. The ROV H-LINK is then vertically lowered for anchor chain reconnection. After the connection is completed, the ROV needs to be disassembled and removed from the seabed by seabed shearing, and then the H-LINK is lifted for anchor chain laying. The vertical connection method requires additional prefabrication of installation fixtures and matching tests, significantly increasing construction costs. At the same time, the underwater disassembly and installation of the ROV fixtures also generates a large workload, posing certain difficulties and safety risks. Therefore, a horizontal connection method needs to be designed to reduce the underwater operation time of the ROV and improve construction efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a horizontal anchor chain connection structure for ROV H-LINK and its usage method, which can restrict the free sliding of the anchor chain, keeping it in a horizontal state at all times. After being connected to the ROV H-LINK during ROV operation, it is locked, which is beneficial for ROV underwater operations.

[0004] To achieve the objectives of this invention, a horizontal anchor chain connection structure for ROV H-LINK is provided, comprising: a support structure, wherein the support structure plate is provided with an anchor chain mounting groove; an opening is formed on one side of the support structure opposite to the opening of the anchor chain mounting groove, extending inwards from the plate surface; an arched fixing structure is provided on the support structure plate, the arched fixing structure being located between the opening and the anchor chain mounting groove; a first track is fixedly connected to one side end of the anchor chain mounting groove, and a second track is fixedly connected to the other side end; the first track is adapted to an anchor chain pin; elongated holes are formed along the edges of both sides of the first track, the elongated holes being connected to the first track rails. The orientation is parallel; a pin push rod passes through the two elongated holes; the anchor chain pin is located between the pin push rod and the anchor chain mounting groove; the second track is equipped with a clamping nut; a pin track is fixedly connected to one side of the second track, and the pin track is equipped with a small pin; the surface of the support structure plate is provided with a first buckle and a second buckle; the bottom edges of the three sides of the support structure, except for the open side, are fixedly connected with a fixing tube; the four corners of the support structure are fixedly connected with support columns; both ends of the fixing tube are fixedly connected to the support columns; the bottom of the support column is fixedly connected with a base.

[0005] As a preferred embodiment of the present invention, the arched fixing structure, the opening, and the anchor chain mounting groove are coaxially arranged, and the distance between the arched fixing structure and the anchor chain mounting groove is adapted to a section of the anchor chain.

[0006] As a preferred embodiment of the present invention, both the first track and the second track are perpendicular to the anchor chain mounting groove and have a semi-circular cross-section; the first track and the second track are coaxially arranged; and the first track and the second track are parallel to the pier structure.

[0007] As a preferred embodiment of the present invention, the end of the anchor chain pin away from the pin push rod is provided with a thread, and the thread is adapted to the clamping nut.

[0008] As a preferred embodiment of the present invention, the end of the anchor chain pin away from the pin push rod is provided with an opening, the diameter of which is adapted to the small pin.

[0009] As a preferred embodiment of the present invention, the number of the first buckles is two and they are symmetrically distributed on both sides of the first track, and the number of the second buckles is two and they are symmetrically distributed on both sides of the second track.

[0010] As a preferred embodiment of the present invention, each of the supporting columns is fixedly connected to an inclined support at one end; one end of the inclined support is fixedly connected to the side end of the supporting column, and the other end is fixedly connected to the base.

[0011] A method for using a ROV H-LINK anchor chain horizontal connection structure includes:

[0012] S1: Position the entire device on the deck, install the anchor chain pin in the first track and secure it with tape through the first clip; install the clamping nut in the second track and secure it with tape through the second clip; install the small pin in the pin track and secure it with tape through the second clip.

[0013] S2: Lift the entire device into the water.

[0014] S3: Place the entire device at the designated location on the seabed, drag the anchor chain so that the second section is locked onto the arched fixing structure, and the first section is erected upward in the anchor chain mounting groove, in preparation for the lowering of the connector.

[0015] S4: Connect the connector and hoisting anchor chain and lower it slowly, accurately placing it into the anchor chain mounting groove on the pier structure.

[0016] S5: The ROV (underwater robot) cuts off the tape, slightly lifts the pin push rod, and then pushes the anchor chain pin into place along the long hole, so that the anchor chain pin passes through the anchor chain hole of the connector.

[0017] S6: The ROV (Remotely Operated Vehicle) cuts off the tape and then uses its robotic arm to rotate the clamping nut, making the clamping nut and the anchor chain pin fully threaded together.

[0018] S7: The ROV (underwater robot) cuts off the tape, inserts the small pin along the pin track into the opening of the anchor chain pin, and then the robotic arm bends and jams the small section of the tail of the small pin.

[0019] S8: The crane will slightly lift the connected anchor chain to separate it from the device, drag the anchor chain and lower it to the seabed.

[0020] S9: The crane retrieves the entire empty unit from the deck, thus completing the entire operation.

[0021] Compared with the prior art, the present invention provides a horizontal connection structure for ROV H-LINK anchor chains, which has the following advantages:

[0022] The ROV H-LINK anchor chain horizontal connection structure described in this invention restricts the free sliding of the anchor chain, keeping it in a horizontal position at all times. It is locked after being connected to the ROV H-LINK via ROV operation. This fixing device is easy to operate and beneficial for ROV underwater operations. Furthermore, the base has low requirements for sea conditions, and its structural form can be adjusted according to different project needs to increase the contact area with the seabed, thereby improving the base's anti-overturning capacity and soil bearing capacity. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a partial structural schematic diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the installation and positioning of the present invention;

[0026] Figure 4 This is a schematic diagram of the installation and positioning part of the present invention.

[0027] Figure 5 This is a schematic diagram of the hoisting and removal of the support platform according to the present invention.

[0028] 1 is the foundation structure, 2 is the anchor chain mounting groove, 3 is the anchor chain, 4 is the connector, 5 is the hoisting anchor chain, 6 is the pin push rod, 7 is the anchor chain pin, 8 is the clamping nut, 9 is the small pin, 10 is the first track, 11 is the second track, 12 is the elongated hole, 13 is the first buckle, 14 is the second buckle, 15 is the opening, 16 is the arched fixing structure, 17 is the fixing pipe, 18 is the supporting column, 19 is the base, 20 is the diagonal support, and 21 is the pin track. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1-5This invention provides a horizontal connection structure for ROV H-LINK anchor chains, comprising: a support structure 1, wherein the support structure 1 has an anchor chain mounting groove 2 on its surface; an opening 15 is formed on one side of the support structure 1 opposite to the opening of the anchor chain mounting groove 2, extending inward; an arched fixing structure 16 is provided on the surface of the support structure 1, the arched fixing structure 16 being located between the opening 15 and the anchor chain mounting groove 2; a first track 10 is fixedly connected to one side end of the anchor chain mounting groove 2, and a second track 11 is fixedly connected to the other side end; the first track 10 is adapted to be fitted with an anchor chain pin 7; elongated holes 12 are formed along the edges of both sides of the first track 10, the elongated holes 12 being parallel to the track direction of the first track 10. ; Pin push rod 6, the pin push rod 6 passes through the two elongated holes 12; Anchor chain pin 7 is located between the pin push rod 6 and the anchor chain mounting groove 2; The second track 11 is adapted to be fitted with a clamping nut 8; A pin track 21 is fixedly connected to one side of the second track 11, and the pin track 21 is adapted to be fitted with a small pin 9; The surface of the support structure 1 is provided with a first buckle 13 and a second buckle 14; The bottom edges of the three sides of the support structure 1, except for the side with the opening 15, are fixedly connected to a fixing tube 17; Support columns 18 are fixedly connected to the four corners of the support structure 1; The two ends of the fixing tube 17 are fixedly connected to the support columns 18; A base 19 is fixedly connected to the bottom of the support column 18.

[0031] In one embodiment of the present invention, the arched fixing structure 16, the opening 15, and the anchor chain mounting groove 2 are coaxially arranged, and the distance between the arched fixing structure 16 and the anchor chain mounting groove 2 is adapted to a section of the anchor chain.

[0032] In one embodiment of the present invention, the first track 10 and the second track 11 are both perpendicular to the anchor chain mounting groove 2 and have a semi-circular cross-section; the first track 10 and the second track 11 are coaxially arranged; the first track 10 and the second track 11 are arranged parallel to the pier structure 1.

[0033] In one embodiment of the present invention, the end of the anchor chain pin 7 away from the pin push rod 6 is provided with a thread, and the thread is adapted to the clamping nut 8.

[0034] In one embodiment of the present invention, an opening is provided at the end of the anchor chain pin 7 away from the pin push rod 6, and the diameter of the opening is adapted to the small pin 9.

[0035] In one embodiment of the present invention, there are two first buckles 13 symmetrically distributed on both sides of the first track 10, and two second buckles 14 symmetrically distributed on both sides of the second track 11.

[0036] In one embodiment of the present invention, each side end of the support column 18 is fixedly connected to an inclined support 20; one end of the inclined support 20 is fixedly connected to the side end of the support column 18, and the other end is fixedly connected to the base 19.

[0037] A method for using a ROV H-LINK anchor chain horizontal connection structure includes:

[0038] S1: Position the entire device on the deck, install the anchor chain pin 7 in the first track 10 and secure it with tape through the first buckle 13; install the clamping nut 8 in the second track 11 and secure it with tape through the second buckle 14; install the small pin 9 in the pin track and secure it with tape through the second buckle 14.

[0039] S2: Lift the entire device into the water.

[0040] S3: Place the entire device at the designated location on the seabed, drag the anchor chain 3 so that the second section is locked onto the arched fixing structure 16, and the first section is raised in the anchor chain mounting groove 2 to prepare for the lowering of the connector 4.

[0041] S4: Connector 4 and hoisting anchor chain 5 and slowly lower them to accurately place them in the anchor chain mounting groove 2 on the pier structure 1.

[0042] S5: The ROV (underwater robot) cuts off the tape, slightly lifts the pin push rod 6, and then pushes the anchor chain pin 7 into place along the long hole 12, so that the anchor chain pin 7 passes through the anchor chain hole of the connector 4.

[0043] S6: The ROV (Remote Operating Vehicle) cuts off the tape and then uses the robotic arm to rotate the clamping nut 8, so that the clamping nut 8 and the anchor chain pin 7 are fully threaded together.

[0044] S7: The ROV (underwater robot) cuts off the tape, and the small pin 9 is inserted into the opening of the anchor chain pin 7 along the pin track 21. Then the robotic arm bends and jams the small section of the tail of the small pin 9.

[0045] S8: The crane will slightly lift the connected anchor chain to separate it from the device, drag the anchor chain and lower it to the seabed.

[0046] S9: The crane retrieves the entire empty unit from the deck, thus completing the entire operation.

[0047] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An ROV H-LINK chain lay structure, characterized in that, include: A pier structure (1) is provided with an anchor chain mounting groove (2) on its plate surface; an opening (15) is provided on one side of the pier structure (1) opposite to the opening of the anchor chain mounting groove (2) inwards; an arched fixing structure (16) is provided on the plate surface of the pier structure (1), the arched fixing structure (16) being located between the opening (15) and the anchor chain mounting groove (2); a first track (10) is fixedly connected to one side end of the anchor chain mounting groove (2), and a second track (11) is fixedly connected to the other side end; the first track (10) is adapted to be fitted with an anchor chain pin (7); elongated holes (12) are provided along the edges of the two sides of the first track (10), the elongated holes (12) being parallel to the track direction of the first track (10); a pin push rod (6) is provided, the pin... The shaft push rod (6) passes through the two elongated holes (12); the anchor chain pin (7) is located between the pin push rod (6) and the anchor chain mounting groove (2); the second track (11) is fitted with a clamping nut (8); a pin track (21) is fixedly connected to one side of the second track (11), and a small pin (9) is fitted to the pin track (21); the plate surface of the support structure (1) is provided with a first buckle (13) and a second buckle (14); the bottom edge of the three sides of the support structure (1) except for the side with the opening (15) is fixedly connected with a fixing tube (17); the four corners of the support structure (1) are fixedly connected with support columns (18); the two ends of the fixing tube (17) are fixedly connected to the support columns (18); the bottom end of the support column (18) is fixedly connected with a base (19).

2. The ROV H-LINK anchor chain horizontal connection structure according to claim 1, characterized in that: The arched fixing structure (16), the opening (15), and the anchor chain mounting groove (2) are coaxially arranged, and the distance between the arched fixing structure (16) and the anchor chain mounting groove (2) is adapted to a section of the anchor chain.

3. The ROV H-LINK anchor chain horizontal connection structure according to claim 1, characterized in that: The first track (10) and the second track (11) are both perpendicular to the anchor chain mounting groove (2) and have a semi-circular cross-section; the first track (10) and the second track (11) are coaxially arranged; the first track (10) and the second track (11) are arranged parallel to the pier structure (1).

4. The ROV H-LINK anchor chain horizontal connection structure according to claim 1, characterized in that: The anchor chain pin (7) has a threaded end away from the pin push rod (6), and the thread is adapted to the clamping nut (8).

5. The ROV H-LINK anchor chain horizontal connection structure according to claim 1, characterized in that: The anchor chain pin (7) has an opening at one end away from the pin push rod (6), and the diameter of the opening is adapted to the small pin (9).

6. The ROV H-LINK anchor chain horizontal connection structure according to claim 1, characterized in that: The number of the first buckle (13) is two and they are symmetrically distributed on both sides of the first track (10), and the number of the second buckle (14) is two and they are symmetrically distributed on both sides of the second track (11).

7. The ROV H-LINK anchor chain horizontal connection structure according to claim 1, characterized in that: Each of the supporting columns (18) is fixedly connected to a diagonal support (20) at one end; one end of the diagonal support (20) is fixedly connected to the side of the supporting column (18), and the other end is fixedly connected to the base (19).

8. A method of using the ROV H-LINK anchor chain horizontal connection structure as described in any one of claims 1 to 7, characterized in that: S1: Position the entire device on the deck, install the anchor chain pin (7) in the first track (10) and secure it with tape through the first buckle (13); install the clamping nut (8) in the second track (11) and secure it with tape through the second buckle (14); install the small pin (9) in the pin track and secure it with tape through the second buckle (14); S2: Lift the entire device and launch it into the water; S3: Place the entire device at the designated location on the seabed, drag the anchor chain (3) so that the second section is locked on the arched fixing structure (16), and the first section is erected upward in the anchor chain mounting groove (2) to prepare for the lowering of the connector (4); S4: Connector (4) and hoisting anchor chain (5) and slowly lower them to accurately place them in the anchor chain mounting groove (2) on the pier structure (1); S5: The ROV (underwater robot) cuts off the tape, slightly lifts the pin push rod (6), and then pushes the anchor chain pin (7) into place along the long hole (12) so that the anchor chain pin (7) passes through the anchor chain hole of the connector (4); S6: The ROV (underwater robot) cuts off the tape and then uses the robotic arm to rotate the clamping nut (8) so that the clamping nut (8) and the anchor chain pin (7) are fully threaded together; S7: The ROV (underwater robot) cuts off the tape, and the small pin (9) is inserted into the opening of the anchor chain pin (7) along the pin track (21). Then the robotic arm bends and jams the small section at the tail of the small pin (9). S8: The crane will slightly lift the connected anchor chain to separate it from the device, drag the anchor chain and lower it to the seabed; S9: The crane retrieves the entire empty unit from the deck, thus completing the entire operation.

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