Locking and unlocking method for offshore lightering platform

Abstract

The invention relates to a locking and unlocking method for an offshore lightering platform. Belongs to the technical field of offshore lightering operation and solves the problem that connection and unlocking between an existing lightering platform and a ship are inconvenient. The unlocking method and the locking method of the offshore lightering platform are opposite in process; the locking method comprises the following steps that S1, the locking support is screwed out, and the first lap joint plate and the lightering operation plate are locked through the locking support; s2, a locking pull rod on the lightering operation plate is screwed out, a second lap joint plate is turned upwards, and the second lap joint plate is supported through the locking pull rod; s3, the lightering operation plate and the second lap joint plate are locked through a locking plug pin; and S4, after locking of the first lap joint plate, the lightering operation plate and the second lap joint plate is completed, the second lap joint plate and the ship platform are connected through a connecting bearing, and connection of the offshore lightering platform and the ship is achieved. According to the invention, rapid and reliable connection between the lightering platform and the ship is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore lightering operations, and particularly to a locking and unlocking method for an offshore lightering platform. Background Art

[0002] Lightering operations generally refer to the process of a ro-ro ship docking at a wharf, buoy, berthing platform, or loading and unloading goods, personnel, and vehicles with a barge or other small boats in an anchorage. When a ship is moored at sea, it will be affected by factors such as wind, waves, currents, and swells, resulting in six-degree-of-freedom coupled swaying motions. Therefore, lightering operations are difficult to achieve under relatively high sea conditions.

[0003] As a tool for offshore cargo loading and transshipment, the lightering platform should compensate for the six-degree-of-freedom swaying motions between the ship and the platform to ensure the safety and stability of cargo loading.

[0004] Traditional offshore lightering mainly uses two methods: a ramp-type platform and a crane loading.

[0005] The ramp-type platform directly erects a ramp between the hull and the berthing platform to achieve the lightering of goods, personnel, and vehicles. However, the connection reliability between the ramp and the hull is poor, and this method is greatly affected by the hull movement. Therefore, it can only be used in an environment with extremely low sea conditions, no wind, and no waves.

[0006] Crane loading realizes the hoisting and lightering of the goods on the ship through a crane on the berthing platform. The sea condition applicability is also poor, and the cost of crane lightering is relatively high, and the implementation conditions are limited.

[0007] Existing technical solutions have disadvantages such as low safety and complex implementation conditions. In view of the above problems, a new design is made for the connection method between the offshore lightering platform and the hull, and a locking and unlocking method for the offshore lightering platform is proposed to facilitate the connection work between the lightering platform and the ship. Summary of the Invention

[0008] In view of the above analysis, the present invention aims to provide a locking and unlocking method for an offshore lightering platform to solve the problem of inconvenient connection and unlocking operations between the existing lightering platform and the ship.

[0009] The object of the present invention is mainly achieved through the following technical solutions:

[0010] A locking and unlocking method for an offshore lightering platform, wherein the unlocking method of the offshore lightering platform is opposite to the locking method in process;

[0011] The locking method includes the following steps:

[0012] Step S1: Screw out the locking support and lock the first lap plate and the lightering operation plate through the locking support;

[0013] Step S2: Unscrew the locking rod on the transfer operation board, flip the second lap board upward, and support the second lap board through the locking rod;

[0014] Step S3: Locking the transfer operation board and the second lap board by locking the latch;

[0015] Step S4: After the first lap plate, the transfer operation plate and the second lap plate are locked, the second lap plate and the ship platform are connected by connecting bearings to achieve the connection between the offshore transfer platform and the ship.

[0016] Furthermore, in step S1, the first lap plate is connected to the berthing platform through the transfer platform base, and one end of the first lap plate and the transfer operation board are hinged through a first hinge shaft; the locking support is rotatably arranged on the transfer platform base, and the rotation axis of the locking support is perpendicular to the first hinge shaft; when the locking support locks the first lap plate and the transfer operation board, the two cannot rotate relative to each other.

[0017] Furthermore, in step S1, the method of locking the first lap plate and the barge operation plate by the locking support is:

[0018] Step S11: adjusting the first lap plate and the transfer operation plate to be located on the same plane;

[0019] Step S12: Unscrew the locking support from the mounting groove of the transfer platform base until the locking support is locked into the locking groove at the end of the transfer operation board;

[0020] Step S13: When the locking support is engaged with the locking groove, the locking support is perpendicular to the first hinge axis between the first lap plate and the transfer operation plate, so that the two cannot rotate relative to each other.

[0021] Furthermore, in step S2, the other end of the transfer operation board is rotatably connected to the second lap plate; the locking method of the locking rod to the second lap plate is:

[0022] Step S21: The locking rod is hingedly mounted on the upper surface of the transfer operation board; the locking rod is rotated so that an acute angle is formed between the locking rod and the transfer operation board;

[0023] Step S22: flipping the second lap plate upward until the second lap plate contacts the locking rod;

[0024] Step S23: an arc-shaped groove is provided at the end of the locking rod, and a support column is provided on the second lap plate; the second lap plate is pressed down so that the side of the support column engages with the arc-shaped groove, and after engagement, the locking rod can fix and support the second lap plate.

[0025] Further, in the step S3, one end of the locking bolt is rotatably installed on the second lapping plate, and the other end can cooperate with the first locking hole on the lightering operation plate; when the locking bolt cooperates with the second locking hole, the lightering operation plate and the second lapping plate cannot rotate relative to each other.

[0026] Further, in the step S4, after the first lapping plate, the lightering operation plate and the second lapping plate are relatively fixed, the offshore lightering platform can be displaced as a whole.

[0027] Further, in the step S4, the lightering platform base and the berthing platform are slidably matched through a T-shaped slide rail and a T-shaped slide groove; by pushing the lightering platform base to slide relative to the berthing platform, the distance that the offshore lightering platform extends out of the berthing platform can be adjusted, and thus the second lapping plate can be made closer to the ship platform.

[0028] Further, in the step S4, a connecting bearing is fixedly installed on the lower surface of the second lapping plate; the inner ring of the connecting bearing can be inserted and connected with the berthing convex block on the ship platform, and thus the second lapping plate and the ship platform can be connected.

[0029] Further, the connection method between the second lapping plate and the ship platform is as follows:

[0030] Step S41: Push out the lightering platform base until the connecting bearing is located above the berthing convex block;

[0031] Step S42: Rotate the inner ring of the connecting bearing to align the spline groove on the side surface of the inner ring with the spline-shaped berthing convex block;

[0032] Step S43: Press down the second lapping plate to insert and fix the berthing convex block with the spline groove on the side surface of the inner ring of the connecting bearing.

[0033] Further, in the step S4, after the connection between the ship platform and the offshore lightering platform is completed, the locking functions of the locking support, the locking tie rod and the locking bolt are released, so that the first lapping plate, the lightering operation plate and the second lapping plate of the offshore lightering platform can move relative to each other.

[0034] The technical solution of the present invention can at least achieve one of the following effects:

[0035] 1. The locking and unlocking method of the offshore lightering platform of the present invention locks and unlocks the first lap plate, the lightering operation plate, and the second lap plate through three locking mechanisms: the locking support, the locking tie rod, and the locking pin, enabling it to switch between a fixed state and a free movement state. When lightering operations are not being carried out, the lightering platform is in a locked state, facilitating its being pushed out by the berthing platform; when lightering operations are being carried out, the locking support, the locking tie rod, and the locking pin are unlocked, and the lightering platform is in a moving state, capable of automatically adapting to the movement of the ship to maintain the stability of the lightering operation plate.

[0036] 2. The locking and unlocking method of the offshore lightering platform of the present invention uses a rotatable connecting bearing to dock with the berthing bump. This can ensure the reliability of the connection through a spline structure and can quickly align with the berthing bump by rotating the inner ring of the connecting bearing. The operation is simple and convenient, providing the connection reliability and connection efficiency between the lightering platform and the ship.

[0037] In the present invention, the above technical solutions can also be combined with each other to achieve more preferred combined solutions. Other features and advantages of the present invention will be described in the subsequent specification, and some advantages can be made obvious from the specification or understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained through the content specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings are only for the purpose of showing specific embodiments and are not considered to be a limitation of the present invention. Throughout the drawings, the same reference signs represent the same components.

[0039] Figure 1 It is a flowchart of the locking process of the cross-bridge type offshore lightering platform in Embodiment 1 of the present invention;

[0040] Figure 2 It is a schematic diagram of the connection state between the cross-bridge type offshore lightering platform and the ship platform in Embodiment 1 of the present invention;

[0041] Figure 3 It is a schematic diagram of the structure of the cross-bridge type offshore lightering platform in Embodiment 1 of the present invention;

[0042] Figure 4 It is a schematic diagram of the state where the locking support on the lightering platform base is screwed out in Embodiment 1 of the present invention;

[0043] Figure 5 It is a schematic diagram of the connection state between the lightering platform base and the first lap plate in Embodiment 1 of the present invention;

[0044] Figure 6 It is a schematic diagram of the state where the locking tie rod on the second lightering plate is screwed out in Embodiment 1 of the present invention;

[0045] Figure 7 Schematic diagram of the locking tie rod of Embodiment 1 of the present invention supporting the second lapping plate;

[0046] Figure 8 Schematic diagram of the locking pin of Embodiment 1 of the present invention connecting with the second connecting plate;

[0047] Figure 9 Schematic diagram of the connection state between the berthing platform and the barge platform base of Embodiment 1 of the present invention;

[0048] Figure 10 Top view schematic diagram of the connection between the first lapping plate and the berthing platform of Embodiment 1 of the present invention;

[0049] Figure 11 Exploded view of the connection mode between the second lapping plate and the ship platform of Embodiment 1 of the present invention;

[0050] Figure 12 Schematic diagram of the structure of the first lapping plate of Embodiment 1 of the present invention;

[0051] Figure 13 Schematic diagram of the structure of the first barge plate of Embodiment 1 of the present invention;

[0052] Figure 14 Schematic diagram of the structure of the second barge plate of Embodiment 1 of the present invention;

[0053] Figure 15 Schematic diagram of the structure of the first connecting plate of Embodiment 1 of the present invention;

[0054] Figure 16 Schematic diagram of the structure of the second connecting plate of Embodiment 1 of the present invention;

[0055] Figure 17 Schematic diagram of the structure of the second lapping plate of Embodiment 1 of the present invention;

[0056] Figure 18 Schematic diagram of the structure of the barge platform base of Embodiment 1 of the present invention;

[0057] Figure 19 Schematic diagram of the hull coordinate system and the six-degree-of-freedom rocking state of the hull of Embodiment 2 of the present invention;

[0058] Figure 20 Exploded view of the cross-bridge type offshore barge platform of Embodiment 2 of the present invention;

[0059] Figure 21 Schematic diagram of the connection state between the first lapping plate and the first barge plate of Embodiment 2 of the present invention;

[0060] Figure 22Schematic diagram of the connection state of the second transfer board and the first connection board in Embodiment 2 of the present invention;

[0061] Figure 23 Schematic diagram of the connection state of the second connection board and the second lapping board in Embodiment 2 of the present invention;

[0062] Figure 24 Schematic diagram of the compensation state of the heaving motion (displacement along the Y-axis) of the moored ship by the offshore transfer platform in Embodiment 2 of the present invention;

[0063] Figure 25 Schematic diagram of the compensation state of the surging motion (displacement along the X-axis) of the moored ship by the offshore transfer platform in Embodiment 2 of the present invention;

[0064] Figure 26 Schematic diagram of the compensation state of the rolling motion (rotation about the X-axis) of the moored ship by the offshore transfer platform in Embodiment 2 of the present invention;

[0065] Figure 27 Schematic diagram of the compensation state of the pitching motion (rotation about the Y-axis) of the moored ship by the offshore transfer platform in Embodiment 2 of the present invention;

[0066] Figure 28 Schematic diagram of the compensation state of the yawing motion (rotation about the Z-axis) of the moored ship by the offshore transfer platform in Embodiment 2 of the present invention.

[0067] Reference numerals:

[0068] 1 - First lapping board; 2 - First transfer board; 3 - Second transfer board; 4 - First connection board; 5 - Second connection board; 6 - Second lapping board; 7 - Transfer platform base; 8 - Mooring platform; 9 - Locking support; 10 - Locking tie rod; 11 - Locking pin; 12 - Connecting bearing; 13 - Ship platform; 14 - Mooring bump;

[0069] 101 - First bearing outer ring; 102 - First arc-shaped chute; 103 - First limit block;

[0070] 201 - First comb structure; 202 - Linear chute;

[0071] 301 - Second comb structure; 302 - Sliding convex block; 303 - First locking hole;

[0072] 401 - Second bearing inner ring; 402 - Second arc-shaped chute;

[0073] 501 - Second bearing outer ring; 502 - Ball head slider; 503 - Locking hole;

[0074] 601 - Cylindrical convex ring; 602 - Second locking hole; 603 - Support column;

[0075] 701 - Ball; 702 - T-shaped slide rail; 703 - Inner ring of the first bearing; 704 - Second limit block;

[0076] 801 - T-shaped chute. Detailed implementation manner

[0077] The following combines the drawings to specifically describe the preferred embodiments of the present invention. Among them, the drawings constitute a part of the present invention and are used together with the embodiments of the present invention to explain the principle of the present invention, rather than to limit the scope of the present invention.

[0078] Embodiment 1

[0079] A specific embodiment of the present invention provides a locking and unlocking method for a marine lightering platform. As Figure 1 shown, the unlocking method of the marine lightering platform is opposite to the locking method process.

[0080] In the present invention, the locking method includes the following steps:

[0081] Step S1: Screw out the locking support 9 and lock the first lap plate 1 and the lightering operation plate through the locking support 9;

[0082] Step S2: Screw out the locking pull rod 10 on the lightering operation plate, turn up the second lap plate 6, and support the second lap plate 6 through the locking pull rod 10;

[0083] Step S3: Lock the lightering operation plate and the second lap plate 6 through the locking pin 11;

[0084] Step S4: After completing the locking of the first lap plate 1, the lightering operation plate and the second lap plate 6, connect the second lap plate 6 and the ship platform 13 through the connecting bearing 12 to realize the connection between the marine lightering platform and the ship.

[0085] The marine lightering platform of the present invention, as Figure 2 、 Figure 3 shown, includes: a first lap plate 1, a lightering operation plate, a second lap plate 6, a lightering platform base 7 and a connecting bearing 12. One end of the first lap plate 1 is hinged to the lightering operation plate; the other end of the second lap plate 6 is rotatably connected to the lightering operation plate. The bottom of the first lap plate 1 is provided with a lightering platform base 7, and is slidably connected to the berthing platform 8 through the lightering platform base 7. A connecting bearing 12 is provided on the lower surface of the second lap plate 6, and the connecting bearing 12 can be inserted and connected to the berthing protrusion 14 on the ship platform 13. The cross-bridge type marine lightering platform of the present invention is lapped between the ship platform 13 and the berthing platform 8, and thus lightering operations can be carried out through the cross-bridge type marine lightering platform of the present invention.

[0086] (I) Step S1:

[0087] In the step S1, the first overlapping plate 1 is connected to the berthing platform 8 through the lightering platform base 7, and one end of the first overlapping plate 1 and the lightering operation plate are hinged and connected through a first hinge shaft; the locking support 9 is rotatably arranged on the lightering platform base 7, and the rotation axis of the locking support 9 is perpendicular to the first hinge shaft; when the locking support 9 locks the first overlapping plate 1 and the lightering operation plate, the two cannot rotate relative to each other.

[0088] As Figure 4 shown, in a specific embodiment of the present invention, a group of locking supports 9 are symmetrically arranged on the side surface of the lightering platform base 7. As Figure 4 shown, the locking support 9 is a rectangular block structure.

[0089] Specifically, the locking support 9 is hinged and installed on the lightering platform base 7, and can be perpendicular to the lightering platform base 7 after being screwed out.

[0090] Specifically, two installation grooves are provided on the side surface of the lightering platform base 7; the locking support 9 is hinged and installed in the installation groove through a rotating shaft. The locking support 9 is rotatably sleeved outside the rotating shaft, and the rotating shaft is fixedly installed in the installation groove of the lightering platform base 7 by welding or bonding, so as to realize the rotational installation of the locking support 9 and the lightering platform base 7, and the locking support 9 can be screwed into the interior of the installation groove.

[0091] Furthermore, as Figure 5 shown, a locking groove is provided at one end of the lightering operation plate; after the locking support 9 is screwed out from the lightering platform base 7, it can be snapped into the locking groove, thereby restricting the relative rotation of the first overlapping plate 1 and the lightering operation plate.

[0092] Furthermore, in the step S1: the method for the locking support 9 to lock the first overlapping plate 1 and the lightering operation plate is as follows:

[0093] Step S11: Adjust the first overlapping plate 1 and the lightering operation plate to be in the same plane;

[0094] Step S12: Screw out the locking support 9 from the installation groove of the lightering platform base 7; until the locking support 9 is snapped into the locking groove at the end of the lightering operation plate; specifically, the locking support 9 is located on one side of the lightering platform base 7, and can achieve an external rotation of not less than 100°.

[0095] Step S13: When the locking support 9 is engaged with the locking groove, the locking support 9 is perpendicular to the first hinge shaft between the first overlapping plate 1 and the lightering operation plate, so that the two cannot rotate relative to each other. The locking support 9 forms a supporting effect on the first lightering plate 2, so that the first lightering plate 2 and the lightering platform base 7 are kept horizontal, which is convenient for the overall pushing out of the lightering platform.

[0096] In a specific embodiment of the present invention, the lightering operation board includes a first lightering board 2 and a second lightering board 3; and the first lightering board 2 and the second lightering board 3 can slide relative to each other. A locking groove is provided at the end of the first lightering board 2. When the locking support 9 is screwed out, it can be inserted into the locking groove of the first lightering board 2. The first lap board 1 is hinged to the first lightering board 2. When the locking support 9 and the locking groove are not engaged, the two can rotate relative to each other; when the locking support 9 and the locking groove are engaged, the two cannot rotate relative to each other.

[0097] (II) Step S2:

[0098] In the step S2, as Figure 6 、 Figure 7 shown, in a specific embodiment of the present invention, a locking pull rod 10 is provided on the upper surface of the lightering operation board; the locking pull rod 10 is rotatably installed on the lightering operation board and can support the second lap board 6. The locking pull rod 10 is hingedly installed on the upper surface of the second lightering board 3. Specifically, an arc-shaped groove is provided at the end of the locking pull rod 10. As Figure 8 shown, a clamping groove is provided on the second lap board 6, and a support column 603 is provided in the clamping groove; the support column 603 and the arc-shaped groove can be clamped and matched.

[0099] In the step S2, the other end of the lightering operation board is rotatably connected to the second lap board 6; the method for locking the second lap board 6 by the locking pull rod 10 is:

[0100] Step S21: The locking pull rod 10 is hingedly installed on the upper surface of the lightering operation board; rotate the locking pull rod 10 so that it forms an acute angle with the lightering operation board;

[0101] Step S22: Flip the second lap board 6 upward until the second lap board 6 contacts the locking pull rod 10; specifically, when locking, the second lap board 6 needs to be turned up 135° along the rotation axis.

[0102] Step S23: An arc-shaped groove is provided at the end of the locking pull rod 10, and a support column 603 is provided on the second lap board 6; press down the second lap board 6 so that the side surface of the support column 603 is engaged with the arc-shaped groove. After engagement, the locking pull rod 10 can fix and support the second lap board 6. As Figure 7 shown, when the second lap board 6 is rotated upward to form an acute angle with the second lightering board 3, the support column 603 on the second lap board 6 is engaged with the arc-shaped groove at the end of the locking pull rod 10. Furthermore, the locking pull rod 10 can support the second lap board 6 and lock the rotational freedom between the two at the same time.

[0103] (III) Step S3:

[0104] In the step S3, one end of the locking pin 11 is rotatably installed on the second lapping plate 6, and the other end can cooperate with the first locking hole 303 on the lightering operation plate; when the locking pin 11 cooperates with the second locking hole 303, the lightering operation plate and the second lapping plate 6 cannot rotate relative to each other.

[0105] As Figure 8 shown, in a specific embodiment of the present invention, a locking pin 11 is provided on the second lapping plate 6. One end of the locking pin 11 is rotatably installed on the second lapping plate 6 and can be displaced relative to the second lapping plate 6.

[0106] As Figure 8 、 Figure 17 shown, two locking pins 11 are respectively rotatably installed on two sides of the second lapping plate 6. Specifically, both sides of the second lapping plate 6 are L-shaped, with two extending parts, and two mounting holes are respectively provided on the two extending parts. The mounting column of the locking pin 11 penetrates into the mounting hole of the second lapping plate 6, and a limiting part is fixedly installed at the end of the mounting column, so that the locking pin 11 is rotatably installed in the mounting hole of the extending part of the second lapping plate 6.

[0107] Furthermore, a spring is installed between the limiting part and the inner side surface of the extending part. Pull the locking pin 11 outwards to realize its displacement relative to the second lapping plate 6; when the locking pin 11 is pulled out, the spring is compressed; when the spring resets, the locking pin 11 presses against the outer side surface of the extending part.

[0108] Furthermore, the other end of the locking pin 11 is provided with a protruding locking cylinder; the second lapping plate 6 is provided with a second locking hole 602 that cooperates with the locking cylinder. When the locking cylinder cooperates with the second locking hole 602, the locking pin 11 and the second lapping plate 6 move synchronously, and the second lapping plate 6 can rotate relative to the second lightering plate 3 of the lightering operation plate.

[0109] Specifically, a first locking hole 303 is provided on the lightering operation plate; as Figure 7 shown, the first locking hole 303 is provided on the side surface of the second lightering plate 3. When the locking cylinder cooperates with the first locking hole 303, the second lapping plate 6 and the lightering operation plate cannot rotate relative to each other. Or, a locking hole 503 is provided on the side surface of the second connecting plate 5, which can cooperate with the locking cylinder of the locking pin 11 to lock the second connecting plate 5 and the second lapping plate 6; when the lightering platform is pushed out relative to the berthing platform 8, the second connecting plate 5 and the second lapping plate 6 can be kept fixed.

[0110] In the step S3, the method for the locking pin 11 to lock the second lapping plate 6 is:

[0111] Step S31: Pull out the locking pin 11 from the second locking hole 602 on the second lapping plate 6;

[0112] Step S32: Rotate the locking pin 11 so that the locking cylinder at its end aligns with the first locking hole 303 or the locking hole 503; specifically, rotate the locking pin 11 along the mounting post until it coincides with the first locking hole 303 on the lightering operation plate or the locking hole 503 on the second connecting plate 5;

[0113] Step S33: Insert the locking cylinder at the end of the locking pin 11 into the first locking hole 303 on the lightering operation plate or into the locking hole 503 on the second connecting plate 5 to restrict the rotation of the second lapping plate 6.

[0114] Specifically, the locking pin 11 is pressed against the side of the second lapping plate 6 under the elastic force of the spring; the locking cylinder will not disengage from the first locking hole 303 or the locking hole 503 under the elastic force of the spring. At this time, the locking pin 11 can lock the rotational freedom between the second lightering plate 3 and the second lapping plate 6, facilitating the overall pushing out of the platform.

[0115] (IV) Step S4:

[0116] In the said step S4, after the first lapping plate 1, the lightering operation plate and the second lapping plate 6 are relatively fixed, the offshore lightering platform can be displaced as a whole.

[0117] Further, in the said step S4, the lightering platform base 7 and the berthing platform 8 are slidably matched through a T-shaped slide rail 702 and a T-shaped slide groove 801; by pushing the lightering platform base 7 to slide relative to the berthing platform 8, the distance that the offshore lightering platform extends out of the berthing platform 8 can be adjusted, and thus the second lapping plate 6 can be made closer to the ship platform 13.

[0118] As Figure 5 、 Figure 9 、 Figure 10 shown, in a specific embodiment of the present invention, a T-shaped slide rail 702 is provided on the lightering platform base 7; a T-shaped slide groove 801 is provided on the berthing platform 8; the T-shaped slide rail 702 is slidably installed in the T-shaped slide groove 801.

[0119] Specifically, when the T-shaped slide rail 702 and the T-shaped slide groove 801 are slidably matched, due to the shape characteristics of the T-shaped structure, the lightering platform base 7 cannot be separated from the berthing platform 8; and, in order to prevent the lightering platform base 7 from sliding out of the berthing platform 8, one end of the T-shaped slide groove 801 communicates with one side end face of the berthing platform 8, and the T-shaped slide rail 702 can slide in therefrom; the other end of the T-shaped slide groove 801 is a blind groove to restrict the T-shaped slide rail 702 from sliding out and maintain the connection state between the lightering platform base 7 and the berthing platform 8.

[0120] Furthermore, in the step S4, a connecting bearing 12 is fixedly installed on the lower surface of the second overlapping plate 6; the inner ring of the connecting bearing 12 can be inserted and connected with the berthing bump 14 on the ship platform 13, so as to connect the second overlapping plate 6 and the ship platform 13.

[0121] As Figure 2 , Figure 11 shown, the connecting bearing 12 is fixedly installed on the second overlapping plate 6, and the berthing bump 14 is fixedly arranged on the ship platform 13. Specifically, the outer ring of the connecting bearing 12 is fixedly connected with the cylindrical convex ring 601 below the second overlapping plate 6 by interference fit. The inner ring of the connecting bearing 12 is provided with a spline groove; when the inner ring of the connecting bearing 12 rotates relative to the outer ring, the spline groove on its inner wall surface can rotate.

[0122] Specifically, the shape of the berthing bump 14 is spline-shaped, which is the same as the shape of the spline groove. When the spline groove of the connecting bearing 12 is aligned with the berthing bump 14, the berthing bump 14 can be inserted and connected with the spline groove of the connecting bearing 12; thus, the connection between the ship platform 13 and the second overlapping plate 6 can be realized.

[0123] In the step S4, the method for pushing out the lightering platform is as follows: the T-shaped guide rail 702 of the lightering platform base 7 is matched with the T-shaped sliding groove 801 of the berthing platform 8, and the horizontal pushing of the bridge-type lightering platform is carried out through the relative sliding of the two. Further, after the pushing is in place, the berthing platform 8 and the lightering platform base 7 are fixedly connected by bolts, as Figure 9 shown.

[0124] After the platform is pushed in place as Figure 2 shown, then the connecting bearing 12 below the second overlapping plate 6 is inserted into the berthing bump 14 on the ship platform 13 to complete the installation of the lightering platform.

[0125] Furthermore, in the step S4, the connection method between the second overlapping plate 6 and the ship platform 13 is as follows:

[0126] Step S41: Push out the lightering platform base 7 until the connecting bearing 12 is located above the berthing bump 14; specifically, during the pushing process of the lightering platform base 7, the first overlapping plate 1 can rotate relative to the lightering platform base 7 through the first bearing to adjust the circumferential orientation of the connecting bearing 12 on the second overlapping plate 6;

[0127] Step S42: Rotate the inner ring of the connecting bearing 12 to align the spline groove on the side surface of the inner ring with the spline-shaped berthing bump 14;

[0128] Step S43: Press down the second overlapping plate 6 to insert and fix the berthing bump 14 with the spline groove on the side surface of the inner ring of the connecting bearing 12.

[0129] Furthermore, in step S4, after the connection between the ship platform 13 and the offshore transfer platform is completed, the locking effect of the locking support 9, the locking rod 10 and the locking pin 11 is released, so that the first lap plate 1, the transfer operation plate and the second lap plate 6 of the offshore transfer platform can move relative to each other.

[0130] The first lap plate 1 of the present invention is always slidably connected to the berthing platform 8, so that the transfer platform approaches or moves away from the ship platform 13; the second lap plate 6 connects or separates the ship platform 13 by inserting or separating the connecting bearing 12 and the berthing protrusion 14, so as to realize the transfer connection or separation between the berthing ship and the berthing platform 8. When the transfer platform is connected to both the ship platform 13 and the berthing platform 8, the transfer operation can be carried out through the transfer platform to transport materials or personnel between the two.

[0131] Furthermore, when the ship is docked at a long distance, the connecting bearing 12 may not be aligned with the berthing protrusion 14. At this time, the overall length of the transfer platform can be adjusted so that the connecting bearing 12 can be close to the berthing protrusion 14 to achieve a quick connection between the transfer platform and the ship platform 13.

[0132] like Figure 3 , Figure 13 , Figure 14 As shown, in step S4, the transshipment operation board is a retractable structure. The longitudinal displacement of the ship along the OX axis is compensated by the retractable movement of the transshipment operation board.

[0133] The transfer board includes: a first transfer board 2 and a second transfer board 3; the first transfer board 2 and the second transfer board 3 are slidably connected, and the length of the transfer board can be adjusted when the two slide relative to each other. Specifically, a first comb tooth structure 201 is provided on one side of the first transfer board 2; a second comb tooth structure 301 is provided on the side of the second transfer board 3 opposite to the first transfer board 2; the first comb tooth structure 201 and the second comb tooth structure 301 are plugged into each other and slidably matched.

[0134] like Figure 13 , Figure 14 As shown, the first comb tooth structure 201 includes a plurality of parallel first linear protruding teeth, and the second comb tooth structure 301 includes a plurality of parallel second linear protruding teeth. When the first comb tooth structure 201 and the second comb tooth structure 301 are plugged together, the plurality of first linear protruding teeth and the plurality of second linear protruding teeth are interlaced and plugged with each other. In other words, the second linear protruding teeth are inserted between two adjacent first linear protruding teeth, such as Figure 24 , Figure 25 shown.

[0135] Further, a linear chute 202 is provided on the side of the first comb tooth structure 201, and a sliding convex block 302 is provided on the second comb tooth structure 301. When the first comb tooth structure 201 and the second comb tooth structure 301 are inserted into each other, the sliding convex block is snapped into the linear chute 202. To prevent the first comb tooth structure 201 and the second comb tooth structure 301 from separating from each other, after the sliding convex block and the linear chute 202 are in sliding fit, the end opening of the linear chute 202 is blocked to keep the first transfer board 2 and the second transfer board 2 always in a connected state. In the present invention, by adjusting the length of the transfer operation board, the connecting bearing 12 can be brought closer to the berthing convex block 14, facilitating the rapid connection between the transfer platform and the ship platform 13.

[0136] In the present invention, the first transfer board 2 and the second transfer board 3 are slidably connected through the first comb tooth structure 201 and the second comb tooth structure 301; the overall length of the transfer operation board is adjusted by the degree of mutual insertion of the first comb tooth structure 201 and the second comb tooth structure 301 to achieve the rapid connection between the transfer platform and the ship platform 13, and after connection, the telescopic movement of the transfer operation board can be realized, and further, the heaving (front and rear displacement movement) of the ship can be compensated, so that the transfer operation board maintains a stable telescopic movement and avoids large-amplitude torsion or pitching movement caused by the displacement of the ship.

[0137] Embodiment 2

[0138] In a specific embodiment of the present invention, an improved design is made for the unlocking and locking method of the cross-bridge type offshore transfer platform in Embodiment 1: In order to achieve motion compensation for the ship's swaying, the offshore transfer platform in this embodiment is further provided with a compensation mechanism, as Figures 12 - 23 shown.

[0139] The locking and unlocking method of the offshore transfer platform in this embodiment further includes: Step S5: After the transfer platform is connected to the ship platform 13, unlock the transfer platform; after the offshore transfer platform is unlocked, the swaying motion of the ship is compensated by the compensation mechanism.

[0140] Specifically, the unlocking steps of the transfer platform are opposite to the locking steps, and the locking pins 11, the locking tie rods 10 and the locking supports 9 are successively released to restore the transfer platform to a moving state.

[0141] (V) Step S5:

[0142] In the said Step S5, the definition of the six-degree-of-freedom motion of the ship is as Figure 19As shown in the figure, the center of oscillation of the hull is used as the origin O of the coordinate system, the bow direction is the positive X-axis, the vertical upward direction is the positive Z-axis, and the positive Y-axis points to the left side of the hull according to the right-hand rule. Define the six-degree-of-freedom motion of the hull: the rotation about the OX axis is roll; the rotation about the OY axis is pitch; the rotation about the OZ axis is yaw; the translation along the OY axis is sway; the translation along the OX axis is surge; the translation along the OZ axis is heave. When the ship is docked, it will undergo six-degree-of-freedom swaying motion under the influence of sea surface fluctuations. It is necessary to compensate for the ship's swaying through the lightering platform so that the lightering platform will not move significantly with the ship's swaying and maintain the overall stability of the lightering platform. When the lightering platform of the present invention is connected to the ship, the lightering platform is arranged perpendicular to the length direction of the ship.

[0143] In this embodiment, as Figure 21 shown, one end of the first lightering plate 2 is slidably connected to the second lightering plate 3, and the other end is hingedly connected to the first overlapping plate 1. Further, as Figure 5 、 Figure 9 、 Figure 12 、 Figure 18 shown, the first overlapping plate 1 is rotatably connected to the lightering platform base 7 through a first bearing. As Figure 12 shown, the lower surface of the first overlapping plate 1 is fixedly connected to the first bearing outer ring 101 of the first bearing. As Figure 18 shown, the upper surface of the lightering platform base 7 is fixedly connected to the first bearing inner ring 703 of the first bearing. The first bearing outer ring 101, the first bearing balls and the first bearing inner ring 703 form the first bearing.

[0144] In this embodiment, by fixedly connecting the first bearing outer ring 101 and the first bearing inner ring 703 to the first overlapping plate 1 and the lightering platform base 7 respectively, the rotational connection between the two is realized, and they always maintain a parallel state with each other. The relative rotation of the first overlapping plate 1 and the lightering platform base 7 can compensate for the surge motion of the ship along the OX axis direction. Preferably, the first bearing is a plain bearing. The first bearing outer ring 101 and the first bearing inner ring 703 represent the two fixed parts on both sides of the plain bearing and do not represent the size of its diameter.

[0145] Further, when the locking support 9 on the lightering platform base 7 is engaged with the locking groove on the first lightering plate 2, the relative rotation of the first overlapping plate 1 and the first lightering plate 2 can be restricted, as Figure 5 shown.

[0146] Further, in order to limit the rotation amplitude between the first overlapping plate 1 and the lightering platform base 7, a first limiting structure is provided between the two. Specifically, as Figure 5 、 Figure 12 、 Figure 18As shown in the figure, two first arc-shaped sliding grooves 102 are provided on the first overlapping plate 1, and the two first arc-shaped sliding grooves 102 are symmetrically arranged on both sides of the first bearing; correspondingly, balls 701 are provided on the base 7 of the lightering platform, and the balls 701 are rotatably nested in the ball barrels on the base 7 of the lightering platform. When the first overlapping plate 1 is rotatably connected to the base 7 of the lightering platform through the first bearing, the balls 701 can be engaged in the first arc-shaped sliding grooves 102, and the sliding range of the balls 701 is restricted by the length of the first arc-shaped sliding grooves 102, thereby restricting the rotation angle between the base 7 of the lightering platform and the first overlapping plate 1. Preferably, two sets of balls 701 are symmetrically arranged, with two in each set, as Figure 18 shown.

[0147] Specifically, as Figure 12 , Figure 18 shown, two first limiting blocks 103 are provided on the lower surface of the first overlapping plate 1, and the two first limiting blocks 103 are symmetrically arranged on both sides of the first bearing; correspondingly, two sets of second limiting blocks 704 are symmetrically arranged on the base 7 of the lightering platform, with two in each set; the first limiting blocks 103 are located between the two second limiting blocks 704. When the first overlapping plate 1 and the base 7 of the lightering platform rotate relative to each other, the second limiting blocks 704 can restrict the movement range of the first limiting blocks 103, thereby restricting the rotation angle between the first overlapping plate 1 and the base 7 of the lightering platform.

[0148] As Figure 2 , Figure 25 shown, one end of the second lightering plate 3 is slidably connected to the first lightering plate 2, and the other end is rotatably connected to the second overlapping plate 6 through a two-degree-of-freedom rotating pair. In this embodiment, by providing the two-degree-of-freedom rotating pair, the second overlapping plate 6 can perform a pitching motion around the third hinge axis and a front-back torsion motion around the second bearing relative to the second lightering plate 3, thereby compensating for the rolling motion of the ship around the OX axis and the pitching motion around the OY axis.

[0149] Exemplarily, the two-degree-of-freedom rotating pair is a ball joint structure.

[0150] Exemplarily, the two-degree-of-freedom rotating pair is a cross universal joint structure.

[0151] Preferably, in this embodiment, as Figure 8 , Figure 15 , Figure 16 , Figure 20 shown, the two-degree-of-freedom rotating pair includes: a first connecting plate 4, a second connecting plate 5 and a second bearing. Specifically, the first connecting plate 4 is hinged to the second lightering plate 3; the second connecting plate 5 is hinged to the second overlapping plate 6; the first connecting plate 4 and the second connecting plate 5 are parallel to each other and are rotatably connected through the second bearing.

[0152] Specifically, asFigure 15 , Figure 16 As shown in Figure 16 , a second bearing inner ring 401 is provided on the side surface of the first connecting plate 4, and a second bearing outer ring 501 is provided on the side of the second connecting plate 5 facing the first connecting plate 4; the second bearing inner ring 401, the second bearing balls and the second bearing outer ring 501 form a second bearing. After the first connecting plate 4 and the second connecting plate 5 are connected by the second bearing, the two can rotate around the OY axis, and thus can compensate for the pitching motion of the ship in the OY axis direction. Preferably, the second bearing is a plain bearing. The second bearing outer ring 501 and the second bearing inner ring 401 are only used to represent the two fixing parts on both sides of the plain bearing, and do not represent the size of its diameter.

[0153] In this embodiment, in order to limit the rotation amplitude between the first connecting plate 4 and the second connecting plate 5, a second limiting structure is provided between the first connecting plate 4 and the second connecting plate 5. As Figure 15 , Figure 16 , Figure 22 , Figure 23 shown in Figure 23 , the first connecting plate 4 is provided with a second arc-shaped chute 402. Correspondingly, a ball head slider 502 is provided on the side of the second connecting plate 5 facing the first connecting plate 4; the two second arc-shaped chutes 402 and the two ball head sliders 502 are symmetrically arranged on both sides of the second bearing; the ball head slider 502 can be stuck into the second arc-shaped chute 402 and is slidably matched with the second arc-shaped chute 402; the displacement of the ball head slider 502 is limited by the length of the second arc-shaped chute 402, and thus the rotation angle between the second connecting plate 5 and the first connecting plate 4 can be limited.

[0154] As Figure 20 , Figure 21 , Figure 22 , Figure 23 shown in Figure 23 , the first overlapping plate 1 and the first barge plate 2 are hinged by a first hinge shaft; the second barge plate 3 and the first connecting plate 4 are hinged by a second hinge shaft; the second connecting plate 5 and the second overlapping plate 6 are hinged by a third hinge shaft. As Figure 4 , Figure 5 shown in Figure 5 , the first overlapping plate 1 and the barge platform base 7 are rotatably connected by a first bearing, the first connecting plate 4 and the second connecting plate 5 are rotatably connected by a second bearing, and the second overlapping plate 6 and the ship platform 13 are rotatably connected by a connecting bearing 12.

[0155] Specifically, the first lapping plate 1 is provided with a circular first hinged part, and the first lightering plate 2 is provided with a circular second hinged part. The first hinged part and the second hinged part are misaligned and have the same axis. The first hinge shaft passes through the first hinged part and the second hinged part to achieve hinged connection. There is a gap between the first joint part and the second hinged part along the axis direction of the first hinge shaft. Similarly, the hinged connection methods of the second lightering plate 3 and the first connecting plate 4, and the second connecting plate 5 and the second lapping plate 6 are the same as the hinged connection method of the first lapping plate 1 and the first lightering plate 2.

[0156] In the step S5, the compensation method for the movement of the ship by the lightering platform includes:

[0157] Step S51: Compensation for heaving motion and rolling motion:

[0158] In the step S51, the compensation method for the rolling motion and heaving motion of the hull is: the heaving motion and rolling motion of the hull are compensated by the first hinge shaft between the first lapping plate 1 and the first lightering plate 2, the second hinge shaft between the second lightering plate 3 and the first connecting plate 4, and the third hinge shaft between the second connecting plate 5 and the second lapping plate 6.

[0159] When the hull undergoes rolling motion and heaving motion, relative rotation occurs between the first lapping plate 1 and the first lightering plate 2, between the second lightering plate 3 and the first connecting plate 4, and between the second connecting plate 5 and the second lapping plate 6, compensating for the angular displacement of the hull around the OX direction or the linear displacement along the OZ direction.

[0160] That is to say, when the hull undergoes rolling motion (left - right swaying action), the second lapping plate 6 undergoes pitching motion relative to the second lightering plate 3, and the first lapping plate 1 undergoes pitching motion relative to the first lightering plate 2. Through the deflection of the first lapping plate 1 and the second lapping plate 6, the stability of the first lightering plate 2 and the second lightering plate 3 (the main structure of the lightering operation) is maintained.

[0161] Specifically, as Figure 2 , Figure 3 , Figure 21 , Figure 22 , Figure 23 the first hinge shaft is parallel to the second hinge shaft; the first hinge shaft and the second hinge shaft can achieve the pitching deflection and up - down displacement of the second lapping plate 6, used to compensate for the rolling motion of the ship around the OX axis direction, as Figure 26 shown. And the compensation for the heaving motion of the moored ship along the OZ direction by the lightering platform can also be achieved by the hinge shafts between the first lapping plate 1 and the first lightering plate 2, between the second lightering plate 3 and the first connecting plate 4, and between the second connecting plate 5 and the second lapping plate 6. The compensation method is the same as the compensation method for the rolling motion of the ship.

[0162] Step S52: Compensation for pitching motion

[0163] In the said step S52, the compensation method for the pitching motion of the hull is as follows: The pitching motion of the hull is compensated by the second bearing between the first connecting plate 4 and the second connecting plate 5. When the hull has a pitching motion, the first connecting plate 4 and the second connecting plate 5 rotate relative to each other to compensate for the angular displacement of the hull along the OY direction. The rotation axis of the second bearing is perpendicular to the second hinge axis and the third hinge axis; it is used to compensate for the pitching motion around the OY direction, as Figure 27 shown.

[0164] That is to say, when the hull sways back and forth, the second connecting plate 5 rotates around the second bearing, and the second connecting plate 5 makes a pitching motion back and forth relative to the first connecting plate 4. Through the deflection of the second connecting plate 5, the stability of the first transfer plate 2 and the second transfer plate 3 (the main structure of the transfer operation) is maintained.

[0165] Specifically, when compensating for the pitching motion of the hull through the second bearing, the ball head slider 502 on the second connecting plate 5 is in sliding fit with the second arc-shaped chute 402 on the first connecting plate 4; the displacement of the ball head slider 502 is restricted by the length of the second arc-shaped chute 402, and thus the rotation angle between the second connecting plate 5 and the first connecting plate 4 can be restricted.

[0166] In a specific embodiment of the present invention, to ensure better compensation for the pitching motion of the berthing ship around the OY axis and reduce its impact on the transfer operation, the first connecting plate 4, the second connecting plate 5, and the second bearing therebetween should always be perpendicular to the sea level. Therefore, weights are added below the first connecting plate 4 and the second connecting plate 5 to maintain the first connecting plate 4 and the second connecting plate 5 in a vertical state.

[0167] Step S53: Compensation for yawing motion

[0168] In the said step S53, the compensation method for the yawing motion of the hull is as follows: The yawing motion of the hull is compensated by the first bearing between the first overlapping plate 1 and the platform base 7 and the connecting bearing 12 between the second overlapping plate 6 and the ship platform 13; a circumferential rotation in the horizontal direction occurs between the first overlapping plate 1 and the platform base 7, and between the second overlapping plate 6 and the ship platform 13, which is used to compensate for the angular displacement of the hull along the OZ direction.

[0169] Specifically, the rotation axis of the first bearing is perpendicular to the first hinge axis; the rotation axis of the connecting bearing 12 is perpendicular to the third hinge axis. In the said step S53, the first bearing and the connecting bearing can realize the circumferential rotation in the horizontal direction between the first overlapping plate 1 and the transfer platform base 7, and between the sixth connecting plate and the ship platform 13, and can be used to compensate for the yawing motion of the ship around the OZ axis direction, as Figure 28As shown in the figure. That is to say, when the hull swings around the OZ axis, the yaw swing of the hull is compensated by the circumferential rotation of the first lap plate 1 relative to the barge platform base 7 and the circumferential rotation of the ship platform 13 relative to the second lap plate 6, so as to maintain the stability of the first barge plate 2 and the second barge plate 3.

[0170] Furthermore, when the first lap plate 1 rotates circumferentially relative to the barge platform base 7, the sliding range of the ball 701 is restricted by the length of the first arc-shaped chute 102, and thus the rotation angle between the barge platform base 7 and the first lap plate 1 can be restricted.

[0171] Step S54: Compensation for sway motion

[0172] In the step S54, the compensation method for the sway motion of the hull is as follows: the sway motion of the hull is compensated by the relative sliding of the first barge plate 2 and the second barge plate 3; when the hull undergoes sway motion, the relative sliding of the first barge plate 2 and the second barge plate 3 compensates the linear displacement of the hull along the OY direction.

[0173] Specifically, when the hull moves horizontally left and right along the OY direction, the compensation mechanism compensates for the change in the distance between the barge platform and the ship platform 13 through the telescopic mechanism composed of the "first comb tooth structure 201 and the second comb tooth structure 301" between the first barge plate 2 and the second barge plate 3, as Figure 24 shown.

[0174] Step S55:. Compensation for heave motion

[0175] In the step S55, the compensation method for the heave motion of the hull is as follows: there are gaps at the hinge joints between the first lap plate 1 and the first barge plate 2, and between the second barge plate 3 and the first connecting plate 4. The longitudinal displacement of the hull along the OX direction is compensated by the relative sliding of the first lap plate 1 and the first barge plate 2, and between the second barge plate 3 and the first connecting plate 4 along the directions of the first hinge axis and the second hinge axis.

[0176] That is to say, the compensation for the heave motion of the berthed ship by the barge platform is achieved by the gaps at the hinge axes between the first lap plate 1 and the first barge plate 2, and between the second barge plate 3 and the first connecting plate 4 to compensate for the longitudinal margin. That is, the heave motion of the ship along the OX direction is compensated by the relative sliding of the first lap plate 1 and the first barge plate 2 along the first hinge axis, and the second barge plate 3 and the first connecting plate 4 along the second hinge axis, as Figure 25 shown.

[0177] Furthermore, in the step S5, after the barge operation is completed, the connecting bearing 12 is disengaged from the berthing bump 14, and the second lap plate 6 is separated from the ship platform 13 to release the connection between the barge platform and the ship.

[0178] Compared with the prior art, the beneficial effects of the technical solution provided in this embodiment at least include:

[0179] 1. For the cross-bridge type offshore lightering platform of the present invention, by using motion mechanisms such as the first bearing, the second bearing, the linear chute 202 and the slider 302, the hinge shaft, and the connecting bearing 12, for the six-degree-of-freedom swaying motion of the ship caused by the influence of wind, waves, and currents when the ship is moored at sea, the swaying motion of the ship can be passively compensated, thereby maintaining the stability of the bridge-crossing lightering platform. The lightering platform of the present invention can solve the problems existing in the traditional lightering method, such as poor sea condition adaptability, low safety, and complex implementation conditions, and greatly improve the safety and convenience of the lightering operation.

[0180] 2. The bridge-crossing lightering platform of the present invention can achieve rapid locking and unlocking, and through the switching of the above two states, the rapid pushing out and installation operations of the bridge-crossing lightering platform can be realized. It improves the convenience and rapidity of the erection of the lightering platform and the lightering operation, and solves the problems of complex implementation conditions and overly complicated operations in the traditional lightering method;

[0181] 3. The bridge-crossing lightering platform of the present invention can compensate for all six-degree-of-freedom swaying motions of the berthed ship through the motion compensation mechanism between each component. It improves the sea condition adaptability and safety of the lightering operation, and facilitates the lightering of goods, personnel, and vehicles by the operating ship under higher sea conditions.

[0182] 4. The locking and unlocking method of the bridge-crossing lightering platform of the present invention mainly connects the lightering platform base 7 with the berthing platform 8, connects with the ship platform 13 through the berthing convex block 14 and the connecting bearing 12, and locks the first lap plate 1, the lightering operation plate, and the second lap plate 6 through three locking mechanisms, namely the locking support 9, the locking tie rod 10, and the locking pin 11, so that it can switch between the fixed state and the free motion state. When no lightering operation is carried out, the lightering platform is in the locked state and is placed on the berthing platform 8; when carrying out the lightering operation, the lightering platform is pushed out from the berthing platform 8 in the locked state and approaches the berthed ship; after the connection between the lightering platform and the berthed ship is completed, unlock the locking support 9, the locking tie rod 10, and the locking pin 11. After the unlocking operation is completed, when the lightering platform is in the motion state, it can automatically adapt to the motion of the ship to maintain the stability of the lightering operation plate.

[0183] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A locking and unlocking method for an offshore lightering platform, characterized in that, The unlocking method of the offshore lightering platform is opposite to the locking method in process; The locking method includes the following steps: Step S1: Screw out the locking support (9), and lock the first lap plate (1) and the lightering operation plate through the locking support (9); Step S2: Screw out the locking tie rod (10) on the lightering operation plate, turn up the second lap plate (6) upward, and support the second lap plate (6) through the locking tie rod (10); Step S3: Lock the lightering operation plate and the second lap plate (6) through the locking pin (11); Step S4: After locking the first lap plate (1), the lightering operation plate and the second lap plate (6), connect the second lap plate (6) and the ship platform (13) through the connecting bearing (12) to realize the connection between the offshore lightering platform and the ship.

2. The locking and unlocking method of the offshore lightering platform according to claim 1, characterized in that, In the said Step S1, the first lap plate (1) is connected to the berthing platform (8) through the lightering platform base (7), and one end of the first lap plate (1) and the lightering operation plate is hinged through the first hinge shaft; the locking support (9) is rotatably arranged on the lightering platform base (7), and the rotation axis of the locking support (9) is perpendicular to the first hinge shaft; when the locking support (9) locks the first lap plate (1) and the lightering operation plate, the two cannot rotate relative to each other.

3. The locking and unlocking method of the offshore lightering platform according to claim 2, characterized in that, In the said Step S1: The method for the locking support (9) to lock the first lap plate (1) and the lightering operation plate is: Step S11: Adjust the first lap plate (1) and the lightering operation plate to be in the same plane; Step S12: Screw out the locking support (9) from the installation groove of the lightering platform base (7); until the locking support (9) is stuck into the locking groove at the end of the lightering operation plate; Step S13: When the locking support (9) is engaged with the locking groove, the locking support (9) is perpendicular to the first hinge shaft between the first lap plate (1) and the lightering operation plate, so that the two cannot rotate relative to each other.

4. The locking and unlocking method of the offshore lightering platform according to claim 3, characterized in that, In the said Step S2, the other end of the lightering operation plate is rotatably connected to the second lap plate (6); the locking method of the locking tie rod (10) for the second lap plate (6) is: Step S21: The locking tie rod (10) is hingedly installed on the upper surface of the lightering operation plate; rotate the locking tie rod (10) to make an acute angle with the lightering operation plate; Step S22: Turn up the second lap plate (6) upward until the second lap plate (6) contacts the locking tie rod (10); Step S23: An arc-shaped groove is provided at the end of the locking tie rod (10), and a support column (603) is arranged on the second lap plate (6); press down the second lap plate (6) to make the side surface of the support column (603) engage with the arc-shaped groove, and after engagement, the locking tie rod (10) can fix and support the second lap plate (6).

5. The locking and unlocking method of the offshore lightering platform according to claim 4, characterized in that, In the said Step S3, one end of the locking pin (11) is rotatably installed on the second lap plate (6), and the other end can cooperate with the first locking hole (303) on the lightering operation plate; when the locking pin (11) cooperates with the first locking hole (303), the lightering operation plate and the second lap plate (6) cannot rotate relative to each other.

6. The locking and unlocking method of the offshore lightering platform according to any one of claims 1-4, characterized in that, In step S4, after the first lapping plate (1), the lightering operation plate and the second lapping plate (6) are relatively fixed, the offshore lightering platform can be displaced as a whole.

7. The locking and unlocking method of the offshore lightering platform according to claim 6, characterized in that In step S4, the lightering platform base (7) and the berthing platform (8) are in sliding fit through a T-shaped slide rail (702) and a T-shaped chute (801); by pushing the lightering platform base (7) to slide relative to the berthing platform (8), the distance that the offshore lightering platform extends out of the berthing platform (8) can be adjusted, and thus the second lapping plate (6) can be brought closer to the ship platform (13).

8. The locking and unlocking method of the offshore lightering platform according to claim 7, characterized in that, In step S4, a connecting bearing (12) is fixedly installed on the lower surface of the second lapping plate (6); the inner ring of the connecting bearing (12) can be inserted and connected with the berthing projection (14) on the ship platform (13), and thus the second lapping plate (6) and the ship platform (13) can be connected.

9. The locking and unlocking method of the offshore lightering platform according to claim 8, characterized in that, The connection method between the second lapping plate (6) and the ship platform (13) is as follows: Step S41: Push out the lightering platform base (7) until the connecting bearing (12) is located above the berthing projection (14). Step S42: Rotate the inner ring of the connecting bearing (12) to align the spline groove on the side surface of the inner ring with the spline-shaped berthing projection (14). Step S43: Press down the second lapping plate (6) to insert and fix the berthing projection (14) into the spline groove on the side surface of the inner ring of the connecting bearing (12).

10. The locking and unlocking method of the offshore lightering platform according to claim 1, characterized in that In step S4, after the ship platform (13) is connected to the offshore lightering platform, the locking functions of the locking support (9), the locking tie rod (10) and the locking pin (11) are released, so that the first lapping plate (1), the lightering operation plate and the second lapping plate (6) of the offshore lightering platform can move relative to each other.

Images