Cross-bridge type offshore lightering platform

Abstract

The invention relates to a span bridge type offshore lightering platform, belongs to the technical field of offshore lightering operation, and solves the problem that the connecting efficiency of an existing lightering platform and a ship is low in the lightering operation process. The device comprises a first connecting plate, a lightering operation plate, a sixth connecting plate, a berthing platform base and a connecting bearing; the first connecting plate is connected with one end of the lightering operation plate in a hinged mode. The sixth connecting plate is rotationally connected with the other end of the lightering operation plate; a berthing platform base is mounted at the bottom of the first connecting plate, and the first connecting plate is in sliding connection with the berthing platform through the berthing platform base; a connecting bearing is arranged on the lower surface of the sixth connecting plate and can be connected with a berthing protruding block on a ship platform in an inserted mode. Quick connection of the ship and the berthing platform is achieved, and lightering operation is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore lightering operations, and in particular to a cross-bridge type offshore lightering platform. Background Art

[0002] Lightering operations generally refer to the process in which a ro-ro ship docks at a quay, a buoy, or a mooring platform, or the ro-ro ship uses a barge or other small boats to load and unload goods, personnel, and vehicles 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 higher sea conditions.

[0003] As a tool for offshore cargo handling 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: the gangway type platform and the crane loading. The former directly erects a gangway between the hull and the mooring platform to achieve the lightering of goods, personnel, and vehicles. This method cannot compensate for the multi-degree-of-freedom motions of the hull, so it can only be used in an environment with extremely low sea conditions and no wind and waves. The latter realizes the hoisting and lightering of the cargo on the ship through the crane on the mooring platform, and can only compensate for the single-degree-of-freedom motion of the hull's heaving. The sea condition applicability is also poor, and the cost of crane lightering is high, and the implementation conditions are limited.

[0005] In summary, the existing technical solutions have disadvantages such as poor sea condition applicability, low safety, and complex implementation conditions. In view of the above problems, the present invention conducts a new design on the offshore lightering platform and proposes a cross-bridge type lightering platform that is easy to use, has high safety, and can be used under higher sea conditions. Summary of the Invention

[0006] In view of the above analysis, the present invention aims to provide a cross-bridge type offshore lightering platform to solve the problem of low connection efficiency between the existing lightering platform and the ship.

[0007] The object of the present invention is mainly achieved by the following technical solutions:

[0008] A cross-bridge type offshore lightering platform, characterized by comprising: a first connecting plate, a lightering operation plate, a sixth connecting plate, a mooring platform base, and a connecting bearing;

[0009] The first connecting plate is hingedly connected to one end of the lightering operation plate; the sixth connecting plate is rotatably connected to the other end of the lightering operation plate;

[0010] The bottom of the first connecting plate is provided with a mooring platform base and is slidably connected to the mooring platform through the mooring platform base;

[0011] A connecting bearing is provided on the lower surface of the sixth connecting plate, and the connecting bearing can be inserted and connected with the berthing bump on the ship platform.

[0012] Further, a set of locking supports are symmetrically arranged on the side surface of the berthing platform base; the locking supports are rotatably installed on the berthing platform base and can be perpendicular to the berthing platform base after being screwed out.

[0013] Further, a locking groove is provided at one end of the lightering operation plate; after the locking support is screwed out from the berthing platform base, it can be inserted into the locking groove, thereby restricting the relative rotation between the first connecting plate and the lightering operation plate.

[0014] Further, a locking pull rod is provided on the upper surface of the lightering operation plate; the locking pull rod is rotatably installed on the lightering operation plate and can support the sixth connecting plate.

[0015] Further, a clamping groove is provided on the sixth connecting plate, and a support column is provided in the clamping groove; an arc-shaped groove is provided at the end of the locking pull rod; the support column and the arc-shaped groove can be clamped and matched.

[0016] Further, a locking pin is provided on the sixth connecting plate; one end of the locking pin is rotatably installed on the sixth connecting plate and can be displaced relative to the sixth connecting plate; the other end of the locking pin is provided with a protruding locking cylinder; a second locking hole matched with the locking cylinder is provided on the sixth connecting plate.

[0017] Further, when the locking cylinder is matched with the second locking hole, the sixth connecting plate can rotate relative to the lightering operation plate; a first locking hole is provided on the lightering operation plate; when the locking cylinder is matched with the first locking hole, the sixth connecting plate and the lightering operation plate cannot rotate relative to each other.

[0018] Further, the outer ring of the connecting bearing is fixedly connected with the sixth connecting plate.

[0019] Further, a spline groove is provided on the inner ring of the connecting bearing; the berthing bump can be inserted and connected with the spline groove.

[0020] Further, a T-shaped slide rail is provided on the berthing platform base; a T-shaped slide groove is provided on the berthing platform; the T-shaped slide rail is slidably installed in the T-shaped slide groove.

[0021] The technical solution of the present invention can at least achieve one of the following effects:

[0022] 1. Quick locking.

[0023] The cross-bridge type offshore lightering platform of the present invention realizes the quick connection between the ship platform and the lightering platform through the insertion and cooperation of the spline groove of the connecting bearing and the berthing convex block on the ship platform, and can quickly lock the ship; through the insertion or separation of the connecting bearing and the berthing convex block, the quick locking and unlocking of the lightering platform and the ship platform can be realized. Moreover, due to the inner ring of the spline groove of the connecting bearing being able to rotate freely relative to its outer ring, when the berthing convex block is inserted and cooperated with the connecting bearing, its spline groove can freely rotate and adjust the angle according to the position of the berthing convex block, so that the spline groove can quickly align with the berthing convex block.

[0024] 2. Easy to push out.

[0025] For the cross-bridge type offshore lightering platform of the present invention, the berthing platform and the berthing platform base are slidably matched through a T-shaped chute and a T-shaped slide rail, which can realize the quick sliding out of the berthing platform base, and realize the quick pushing out of the first connecting plate and the lightering operation plate; furthermore, the lightering platform can be smoothly close to the ship platform and can be quickly connected to it.

[0026] 3. Reliable fixation.

[0027] For the cross-bridge type offshore lightering platform of the present invention, by setting a locking support to support the lightering operation plate and the first connecting plate, the relative rotation between the two can be restricted; by setting the locking pull rod to be engaged with the support column on the sixth connecting plate, the sixth connecting plate can be supported. After the support, the locking cylinder of the locking pin is inserted into the lightering operation plate, which can lock the sixth connecting plate and the lightering operation plate, facilitating the pushing out of the lightering platform; after unlocking, the various component parts of the lightering platform can rotate relative to each other to adapt to the floating of the ship caused by the impact of sea waves, maintaining the overall stability of the lightering operation plate.

[0028] In the present invention, the above-mentioned various technical solutions can also be combined with each other to realize more preferred combination schemes. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can be made obvious from the description, or understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained from the content specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings are only for the purpose of showing specific embodiments, and are not considered as a limitation to the present invention. Throughout the drawings, the same reference signs represent the same components.

[0030] Figure 1 It is a schematic diagram of the state where the cross-bridge type offshore lightering platform of Embodiment 1 of the present invention is pushed in place;

[0031] Figure 2 It is a schematic diagram of the connection state between the cross-bridge type offshore lightering platform of Embodiment 1 of the present invention and the ship platform;

[0032] Figure 3 Schematic diagram of the connection state between the berthing platform and the berthing platform base in Embodiment 1 of the present invention;

[0033] Figure 4 Schematic diagram of the state where the locking support on the berthing platform base in Embodiment 1 of the present invention is screwed out;

[0034] Figure 5 Schematic top view of the connection between the first connecting plate and the berthing platform in Embodiment 1 of the present invention;

[0035] Figure 6 Schematic diagram of the state where the locking pull rod on the third connecting plate in Embodiment 1 of the present invention is screwed out;

[0036] Figure 7 Schematic diagram of the state where the locking pull rod supports the sixth connecting plate in Embodiment 1 of the present invention;

[0037] Figure 8 Schematic diagram of the structure of the sixth connecting plate in Embodiment 1 of the present invention;

[0038] Figure 9 Schematic diagram of the hull coordinate system and the six - degree - of - freedom swaying state of the hull in Embodiment 2 of the present invention;

[0039] Figure 10 Schematic diagram of the structure of the cross - bridge type offshore lightering platform in Embodiment 2 of the present invention;

[0040] Figure 11 Exploded view of the cross - bridge type offshore lightering platform in Embodiment 2 of the present invention;

[0041] Figure 12 Schematic diagram of the connection state between the first connecting plate and the second connecting plate in Embodiment 2 of the present invention;

[0042] Figure 13 Schematic diagram of the connection state between the third connecting plate and the fourth connecting plate in Embodiment 2 of the present invention;

[0043] Figure 14 Schematic diagram of the connection state between the fifth connecting plate and the sixth connecting plate in Embodiment 2 of the present invention;

[0044] Figure 15 Limiting state between the berthing platform base and the second connecting plate in Embodiment 2 of the present invention;

[0045] Figure 16 Schematic diagram of the state when the locking pin is connected to the fifth connecting plate in Embodiment 2 of the present invention;

[0046] Figure 17Exploded view of the connection method between the sixth connecting plate and the ship platform in Embodiment 2 of the present invention;

[0047] Figure 18 Structural schematic diagram of the first connecting plate in Embodiment 2 of the present invention;

[0048] Figure 19 Structural schematic diagram of the second connecting plate in Embodiment 2 of the present invention;

[0049] Figure 20 Structural schematic diagram of the third connecting plate in Embodiment 2 of the present invention;

[0050] Figure 21 Structural schematic diagram of the fourth connecting plate in Embodiment 2 of the present invention;

[0051] Figure 22 Structural schematic diagram of the fifth connecting plate in Embodiment 2 of the present invention;

[0052] Figure 23 Structural schematic diagram of the berthing platform base in Embodiment 2 of the present invention;

[0053] Figure 24 Schematic diagram of the connection state between the berthing platform base and the first connecting plate in Embodiment 2 of the present invention;

[0054] Figure 25 Schematic diagram of the compensation state of the offshore lightering platform for the sway motion (displacement along the Y-axis) of the berthed ship in Embodiment 2 of the present invention;

[0055] Figure 26 Schematic diagram of the compensation state of the offshore lightering platform for the surge motion (displacement along the X-axis) of the berthed ship in Embodiment 2 of the present invention;

[0056] Figure 27 Schematic diagram of the compensation state of the offshore lightering platform for the roll motion (rotation about the X-axis) of the berthed ship in Embodiment 2 of the present invention;

[0057] Figure 28 Schematic diagram of the compensation state of the offshore lightering platform for the pitch motion (rotation about the Y-axis) of the berthed ship in Embodiment 2 of the present invention;

[0058] Figure 29 Schematic diagram of the compensation state of the offshore lightering platform for the yaw motion (rotation about the Z-axis) of the berthed ship in Embodiment 2 of the present invention.

[0059] Reference numerals:

[0060] 1 - First connecting plate; 2 - Second connecting plate; 3 - Third connecting plate; 4 - Fourth connecting plate; 5 - Fifth connecting plate; 6 - Sixth connecting plate; 7 - Berthing platform base; 8 - Berthing platform; 9 - Locking support; 10 - Locking tie rod; 11 - Locking pin; 12 - Connecting bearing; 13 - Ship platform; 14 - Berthing bump;

[0061] 101 - First bearing outer ring; 102 - First arc-shaped chute; 103 - First limit block;

[0062] 201 - First comb-like structure; 202 - Linear chute;

[0063] 301 - Second comb-like structure; 302 - Sliding bump; 303 - First locking hole;

[0064] 401 - Second bearing inner ring; 402 - Second arc-shaped chute;

[0065] 501 - Second bearing outer ring; 502 - Ball head slider; 503 - Locking hole;

[0066] 601 - Cylindrical convex ring; 602 - Second locking hole; 603 - Support column;

[0067] 701 - Ball; 702 - T-shaped slide rail; 703 - First bearing inner ring; 704 - Second limit block;

[0068] 801 - T-shaped chute. Detailed implementation manner

[0069] The following will specifically describe the preferred embodiments of the present invention in conjunction with the accompanying drawings. Among them, the drawings form 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, and are not used to limit the scope of the present invention.

[0070] Embodiment 1

[0071] A specific embodiment of the present invention provides a cross-bridge type offshore lightering platform, as Figure 1 shown, including: First connecting plate 1, lightering operation plate, Sixth connecting plate 6, Berthing platform base 7 and Connecting bearing 12.

[0072] As Figure 1 , Figure 2 shown, the First connecting plate 1 is hingedly connected to one end of the lightering operation plate; the Sixth connecting plate 6 is rotatably connected to the other end of the lightering operation plate.

[0073] As Figure 1 , Figure 2 shown, the bottom of the First connecting plate 1 is installed with a Berthing platform base 7, and is slidably connected to the Berthing platform 8 through the Berthing platform base 7.

[0074] As Figure 1 , Figure 2 shown, a connecting bearing 12 is provided on the lower surface of the sixth connecting plate 6, and the connecting bearing 12 can be inserted and connected with the berthing bump 14 on the ship platform 13.

[0075] During implementation, the berthing platform base 7 slides out from the berthing platform 8, and then the first connecting plate 1, the lightering operation plate and the sixth connecting plate slide out synchronously, align the connecting bearing 12 on the sixth connecting plate 6 with the berthing bump 14 on the ship platform 13, insert and fit the berthing bump 14 with the inner ring of the connecting bearing 12, and lap the cross-bridge type offshore lightering platform of the present invention between the ship platform 13 and the berthing platform 8, so that the lightering operation can be carried out through the cross-bridge type offshore lightering platform of the present invention.

[0076] As Figure 3 , Figure 5 shown, in a specific embodiment of the present invention, a T-shaped slide rail 702 is provided on the berthing platform base 7; a T-shaped chute 801 is provided on the berthing platform 8; the T-shaped slide rail 702 is slidably installed in the T-shaped chute 801.

[0077] Specifically, when the T-shaped slide rail 702 is slidably engaged with the T-shaped chute 801, due to the shape characteristics of the T-shaped structure, the berthing platform base 7 cannot be separated from the berthing platform 8; and, in order to prevent the berthing platform base 7 from sliding out of the berthing platform 8, one end of the T-shaped chute 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 chute 801 is a blind groove, which restricts the T-shaped slide rail 702 from sliding out and maintains the connection state between the berthing platform base 7 and the berthing platform 8.

[0078] As Figure 4 shown, in a specific embodiment of the present invention, a set of locking supports 9 are symmetrically arranged on the side surface of the berthing platform base 7. As Figure 4 shown, the locking support 9 is a rectangular block structure.

[0079] Specifically, the locking support 9 is hingedly installed on the berthing platform base 7 and can be perpendicular to the berthing platform base 7 after being screwed out.

[0080] Specifically, two installation grooves are provided on the side surface of the berthing platform base 7; the locking support 9 is hingedly 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 berthing platform base 7 by welding or bonding, so as to realize the rotational installation of the locking support 9 and the berthing platform base 7, and the locking support 9 can be screwed into the interior of the installation groove.

[0081] Further, one end of the lightering operation board is provided with a locking groove; after the locking support 9 is screwed out from the berthing platform base 7, it can be snapped into the locking groove, thereby restricting the relative rotation between the first connecting plate 1 and the lightering operation board.

[0082] Specifically, the lightering operation board includes a second connecting plate 2 and a third connecting plate 3; and the second connecting plate 2 and the third connecting plate 3 can slide relative to each other. A locking groove is provided at the end of the second connecting plate 2. When the locking support 9 is screwed out, it can be snapped into the locking groove of the second connecting plate 2. The first connecting plate 1 is hinged to the second connecting plate 2. When the locking support 9 is not engaged with the locking groove, the two can rotate relative to each other; when the locking support 9 is engaged with the locking groove, the two cannot rotate relative to each other.

[0083] As Figure 6 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 sixth connecting plate 6.

[0084] As Figure 6 shown, the locking pull rod 10 is hingedly installed on the upper surface of the third connecting plate 3. Specifically, an arc-shaped groove is provided at the end of the locking pull rod 10.

[0085] Specifically, as Figure 8 shown, a clamping groove is provided on the sixth connecting plate 6, and a support column 603 is provided in the clamping groove; the support column 603 can be clamped and matched with the arc-shaped groove.

[0086] Further, as Figure 7 shown, when the sixth connecting plate 6 is rotated upward to form an acute angle with the third connecting plate 3, the support column 603 on the sixth connecting plate 6 is clamped with the arc-shaped groove at the end of the locking pull rod 10, and then the locking pull rod 10 can support the sixth connecting plate 6.

[0087] As Figure 8 shown, in a specific embodiment of the present invention, a locking pin 11 is provided on the sixth connecting plate 6.

[0088] Further, one end of the locking pin 11 is rotatably installed on the sixth connecting plate 6 and can be displaced relative to the sixth connecting plate 6.

[0089] Specifically, two locking pins 11 are respectively rotatably installed on two sides of the sixth connecting plate 6.

[0090] Specifically, as Figure 8As shown, both sides of the sixth connecting plate 6 are L-shaped, with two extension parts, and two mounting holes are respectively arranged on the two extension parts. The mounting post of the locking pin 11 penetrates into the mounting hole of the sixth connecting plate 6, and a limiting part is fixedly installed at the end of the mounting post, so that the locking pin 11 is rotatably installed in the mounting hole of the extension part of the sixth connecting plate 6.

[0091] Further, a spring is installed between the limiting part and the inner side surface of the extension part. Pull the locking pin 11 outwards to realize its displacement relative to the sixth connecting 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 extension part.

[0092] Further, a protruding locking cylinder is provided at the other end of the locking pin 11; a second locking hole 602 is provided on the sixth connecting plate 6 and is matched with the locking cylinder. When the locking cylinder is matched with the second locking hole 602, the locking pin 11 and the sixth connecting plate 6 move synchronously, and the sixth connecting plate 6 can rotate relative to the third connecting plate 3 of the lightering operation plate.

[0093] Specifically, a first locking hole 303 is provided on the lightering operation plate; when the locking cylinder is matched with the first locking hole 303, the sixth connecting plate 6 and the lightering operation plate cannot rotate relative to each other.

[0094] As Figure 7 shown, the first locking hole 303 is arranged on the side surface of the third connecting plate 3. When it is necessary to relatively fix the sixth connecting plate 6 and the lightering operation plate, pull the locking pin 11 out of the second locking hole 602 on the sixth connecting plate 6, and rotate the locking pin 11 so that the locking cylinder at its end is inserted into the first locking hole 303 on the lightering operation plate.

[0095] As Figure 2 、 Figure 8 shown, a connecting bearing 12 is fixedly installed on the sixth connecting plate 6, and a berthing bump 14 is fixedly arranged on the ship platform 13.

[0096] Specifically, the outer ring of the connecting bearing 12 is fixedly connected with the cylindrical convex ring 601 below the sixth connecting plate 6 by interference fit. A spline groove is arranged on the inner ring of the connecting bearing 12; 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.

[0097] 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 sixth connecting plate 6 can be realized.

[0098] For the cross-bridge type offshore lightering platform of the present invention, its first connecting plate 1 is always slidably connected to the berthing platform 8, and its sixth connecting plate 6 is connected or separated from the ship platform 13 through the insertion or separation of the connecting bearing 12 and the berthing projection 14, thereby realizing the connection or separation between the berthed ship and the berthing platform 8, and further realizing the lightering connection or separation between the berthed ship and the berthing platform 8. When the lightering platform is connected to both the ship platform 13 and the berthing platform 8, lightering operations can be carried out through the lightering platform to transport materials or personnel between the two.

[0099] During implementation, the locking process of the lightering platform is as follows:

[0100] First step, the locking support 9 locks the first connecting plate 1 and the lightering operation plate: The locking support 9 is located on one side of the berthing platform base 7 and can be rotated outwards by 100°. When rotated outwards, it forms a supporting effect on the second connecting plate 2, keeping it horizontal with the berthing platform base 7, facilitating the overall pushing out of the lightering platform.

[0101] Second step, the locking rod 10 supports the sixth connecting plate 6: The locking rod 10 is located on the upper surface of the third connecting plate 3. When locking, the sixth connecting plate 6 needs to be turned up by 135° along the rotation axis, and the third connecting plate 3 and the sixth connecting plate 6 are fixedly connected by engaging the arc-shaped groove at the end of the locking rod 10 and the support column of the sixth connecting plate 6, locking the rotational freedom between the two.

[0102] Third step, the locking pin 11 locks the lightering operation plate and the sixth connecting plate 6: The locking pin 11 is located on both sides of the sixth connecting plate 6. Pull out the locking pin 11 on the sixth connecting plate 6, and rotate the locking pin 11 along the mounting column until it coincides with the first locking hole 303 on the lightering operation plate; press down the locking pin 11 to lock the rotational freedom between the third connecting plate 3 of the lightering operation plate and the sixth connecting plate 6, facilitating the overall pushing out of the platform.

[0103] The unlocking steps of the lightering platform are opposite to the locking steps. By sequentially releasing the locking pin 11, the locking rod, and the locking support 9, the lightering platform can be restored to its moving state.

[0104] Furthermore, the pushing out and installation of the lightering platform:

[0105] Match the T-shaped guide rail 702 of the berthing platform base 7 with the T-shaped sliding groove 801 of the berthing platform 8, and horizontally push out the bridge-type lightering platform through their relative sliding. After pushing to the position, fix the berthing platform 8 and the berthing platform base 7 through bolts, as Figure 3 shown. After the platform is pushed to the position as Figure 2 shown, then insert the connecting bearing 12 below the sixth connecting plate 6 into the berthing projection 14 on the ship platform 13 to complete the installation of the lightering platform.

[0106] The bridge-type lightering platform of the present invention is mainly composed of a berthing platform base 7 connected to a berthing platform 8, connected to a ship platform 13 through a berthing bump 14 and a connecting bearing 12, and locked between a first connecting plate 1, a lightering operation plate, and a sixth connecting plate 6 through three locking mechanisms: a locking support 9, a locking tie rod 10, and a locking pin 11, 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 and placed on the berthing platform 8; when lightering operations are being carried out, the lightering platform is pushed out from the berthing platform 8 in a locked state and approaches the berthed ship; after the lightering platform is connected to the berthed ship, the locking support 9, the locking tie rod 10, and the locking pin 11 are unlocked. After the unlocking operation, when the lightering platform is in a moving state, it can automatically adapt to the movement of the ship to maintain the stability of the lightering operation plate.

[0107] Embodiment 2

[0108] In this embodiment, the definition of the six-degree-of-freedom motion of the ship is as Figure 9 shown. Taking the center of roll of the hull as the origin O of the coordinate system, the bow direction as the positive X-axis, vertically upward as the positive Z-axis, and the positive Y-axis pointing to the left side of the hull according to the right-hand rule. Define the six-degree-of-freedom motion of the hull: rotation about the OX axis is roll; rotation about the OY axis is pitch; rotation about the OZ axis is yaw; translation along the OY axis is sway; translation along the OX axis is surge; translation along the OZ axis is heave. When the ship is berthed, 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 motion through the lightering platform so that the lightering platform will not move significantly with the ship's swaying, achieving the maintenance of the overall stability of the lightering platform.

[0109] In this embodiment, in order to achieve motion compensation for the ship's swaying, the cross-bridge type offshore lightering platform in Embodiment 1 is improved to provide a cross-bridge type offshore lightering platform with a motion compensation mechanism, as Figures 10 - 29 shown.

[0110] 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.

[0111] In this embodiment, as Figure 10 、 Figure 11 shown, one end of the second connecting plate 2 is slidably connected to the third connecting plate 3, and the other end is hingedly connected to the first connecting plate 1.

[0112] I) First bearing:

[0113] Furthermore, as Figure 18 、 Figure 23 、 Figure 24 shown, the first connecting plate 1 is rotatably connected to the berthing platform base 7 through a first bearing. As Figure 18As shown, the lower surface of the first connecting plate 1 is fixedly connected to the first bearing outer ring 101 of the first bearing. As Figure 23 shown, the upper surface of the berthing 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.

[0114] In this embodiment, by fixedly connecting the first bearing outer ring 101 and the first bearing inner ring 703 to the first connecting plate 1 and the berthing platform base 7 respectively, their rotational connection is realized, and they always remain parallel to each other. The relative rotation of the first connecting plate 1 and the berthing platform base 7 can compensate for the longitudinal sway motion of the ship along the OX axis.

[0115] 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.

[0116] Further, when the locking support 9 on the berthing platform base 7 engages with the locking groove on the second connecting plate 2, the relative rotation of the first connecting plate 1 and the second connecting plate 2 can be restricted, as Figure 15 shown.

[0117] II) First limiting structure:

[0118] Further, in order to limit the rotation amplitude between the first connecting plate 1 and the berthing platform base 7, a first limiting structure is provided between them.

[0119] Specifically, as Figure 18 , Figure 23 , Figure 24 shown, two first arc-shaped chutes 102 are provided on the first connecting plate 1, and the two first arc-shaped chutes 102 are symmetrically arranged on both sides of the first bearing; correspondingly, balls 701 are provided on the berthing platform base 7, and the balls 701 are rotatably nested in the ball cylinders on the berthing platform base 7. When the first connecting plate 1 and the berthing platform base 7 are rotationally connected through the first bearing, the balls 701 can be caught in the first arc-shaped chutes 102, and the sliding range of the balls 701 is restricted by the length of the first arc-shaped chutes 102, thereby the rotation angle between the berthing platform base 7 and the first connecting plate 1 can be restricted. Preferably, two groups of balls 701 are symmetrically arranged, with two in each group, as Figure 23 shown.

[0120] Specifically, as Figure 18 , Figure 23As shown, two first limit blocks 103 are arranged on the lower surface of the first connecting plate 1, and the two first limit blocks 103 are symmetrically arranged on both sides of the first bearing; correspondingly, two groups of second limit blocks 704 are symmetrically arranged on the berthing platform base 7, with two blocks in each group; the first limit block 103 is located between the two second limit blocks 704, and when the first connecting plate 1 and the berthing platform base 7 rotate relative to each other, the second limit block 704 can limit the movement range of the first limit block 103, thereby limiting the rotation angle between the first connecting plate 1 and the berthing platform base 7.

[0121] III) Transfer operation board:

[0122] like Figure 10 , Figure 11 As shown, in this embodiment, the transfer operation board is a retractable structure. The longitudinal displacement of the ship along the OX axis is compensated by the retractable movement of the transfer operation board.

[0123] The transfer operation board includes: a second connecting board 2 and a third connecting board 3; the second connecting board 2 and the third connecting board 3 are slidably connected, and the length of the transfer operation board can be adjusted when the second connecting board 2 and the third connecting board 3 slide relative to each other.

[0124] Specifically, a first comb tooth structure 201 is provided on one side of the second connecting plate 2; a second comb tooth structure 301 is provided on a side of the third connecting plate 3 opposite to the second connecting plate 2; the first comb tooth structure 201 and the second comb tooth structure 301 are plugged into and slidably matched with each other.

[0125] In the present invention, the second connecting plate 2 and the third connecting plate 3 are slidably connected by 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 mutual insertion degree of the first comb tooth structure 201 and the second comb tooth structure 301, so as to realize the telescopic movement of the transfer operation board, thereby being able to compensate for the longitudinal (forward and backward displacement) movement of the ship, so that the transfer operation board maintains a stable telescopic movement, and avoids a large-scale torsion or pitching movement caused by the displacement of the ship.

[0126] like Figure 19 , Figure 20 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 10 , Figure 25 shown.

[0127] Further, a linear sliding groove 202 is provided on the side surface 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 sliding groove 202.

[0128] Further, in order 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 sliding groove 202 are in sliding fit, the end opening of the linear sliding groove 202 is blocked to keep the second connecting plate 2 and the third connecting plate 3 always in a connected state.

[0129] In this embodiment, as Figure 10 , Figure 11 shown, one end of the third connecting plate 3 is slidably connected to the second connecting plate 2, and the other end is rotatably connected to the sixth connecting plate 6 through a two-degree-of-freedom rotating pair.

[0130] IV) Two-degree-of-freedom rotating pair

[0131] In this embodiment, by providing a two-degree-of-freedom rotating pair, the sixth connecting 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 third connecting plate 3, and thus can perform motion compensation for the rolling motion of the ship around the OX axis and the pitching motion around the OY axis.

[0132] Exemplarily, the two-degree-of-freedom rotating pair is a ball joint structure.

[0133] Exemplarily, the two-degree-of-freedom rotating pair is a cross universal joint structure.

[0134] In this embodiment, as Figure 13 , Figure 14 , Figure 16 shown, the two-degree-of-freedom rotating pair includes: a fourth connecting plate 4, a fifth connecting plate 5 and a second bearing. Specifically, the fourth connecting plate 4 is hinged to the third connecting plate 3; the fifth connecting plate 5 is hinged to the sixth connecting plate 6; the fourth connecting plate 4 and the fifth connecting plate 5 are parallel to each other and are rotatably connected through the second bearing.

[0135] Specifically, as Figure 21 , Figure 22 shown, a second bearing inner ring 401 is provided on the side surface of the fourth connecting plate 4, and a second bearing outer ring 501 is provided on the side of the fifth connecting plate 5 facing the fourth connecting plate 4; the second bearing inner ring 401, the second bearing balls and the second bearing outer ring 501 form the second bearing. After the fourth connecting plate 4 and the fifth connecting plate 5 are connected through the second bearing, the two can perform a rotational motion around the OY axis, and thus can compensate for the pitching motion of the ship in the direction of the OY axis.

[0136] Preferably, the second bearing is a plain bearing. The outer ring 501 and the inner ring 401 of the second bearing 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.

[0137] V) The second limiting structure

[0138] In this embodiment, in order to limit the rotation amplitude between the fourth connecting plate 4 and the fifth connecting plate 5, a second limiting structure is provided between the fourth connecting plate 4 and the fifth connecting plate 5 in this embodiment.

[0139] As Figure 13 、 Figure 14 、 Figure 21 、 Figure 22 As shown, the fourth connecting plate 4 is provided with a second arc-shaped chute 402. Correspondingly, a ball head slider 502 is arranged on the side of the fifth connecting plate 5 facing the fourth 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 in sliding fit with the second arc-shaped chute 401; 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 fifth connecting plate 5 and the fourth connecting plate 4 can be limited.

[0140] Furthermore, in this embodiment, a locking hole 503 is arranged on the side surface of the fifth connecting plate 5, which can cooperate with the locking cylinder of the locking bolt 11 to lock the fifth connecting plate 5 and the sixth connecting plate 6; when the lightering platform is pushed out relative to the mooring platform 8, the fifth connecting plate 5 and the sixth connecting plate 6 can be kept fixed.

[0141] As Figure 12 、 Figure 13 、 Figure 14 、The first connecting plate 1 and the second connecting plate 2 are hinged by a first hinge shaft; the third connecting plate 3 and the fourth connecting plate 4 are hinged by a second hinge shaft; the fifth connecting plate 5 and the sixth connecting plate 6 are hinged by a third hinge shaft. As Figure 17 、 Figure 24 As shown, the first connecting plate 1 and the mooring platform base 7 are rotationally connected by a first bearing, the fourth connecting plate 4 and the fifth connecting plate 5 are rotationally connected by a second bearing, and the sixth connecting plate 6 and the ship platform 13 are rotationally connected by a connecting bearing 12.

[0142] Specifically, a gap is left between the first connecting plate 1 and the second connecting plate 2 at the first hinge shaft, a gap is left between the third connecting plate 3 and the fourth connecting plate 4 at the second hinge shaft, and a gap is left between the fifth connecting plate 5 and the sixth connecting plate 6 at the third hinge shaft; by setting the gap, motion compensation can be performed when the ship undergoes heaving motion along the OX axis direction.

[0143] Specifically, the first connecting plate 1 is provided with a circular first hinged portion, and the second connecting plate 2 is provided with a circular second hinged portion. The first hinged portion and the second hinged portion are misaligned and have the same axis. The first hinge shaft passes through the first hinged portion and the second hinged portion to achieve hinged connection. There is a gap between the first and second hinged portions along the axis of the first hinge shaft. Similarly, the hinged connection methods of the third connecting plate 3 and the fourth connecting plate 4, and the fifth connecting plate 5 and the sixth connecting plate 6 are the same as those of the first connecting plate 1 and the second connecting plate 2.

[0144] During implementation, the compensation method of the lightering platform for the movement of the ship is as follows:

[0145] 1. Compensation for heaving and rolling motions

[0146] The compensation of the lightering platform for the rolling motion of the berthed ship is achieved through the first hinge shaft, the second hinge shaft, and the third hinge shaft between the first connecting plate 1 and the second connecting plate 2, between the third connecting plate 3 and the fourth connecting plate 4, and between the fifth connecting plate 5 and the sixth connecting plate 6.

[0147] Specifically, as Figure 1 , Figure 7 shown, 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 vertical displacement of the sixth connecting plate 6, which is used to compensate for the rolling motion of the ship in the OX axis direction, as Figure 27 shown.

[0148] When the hull undergoes rolling and heaving motions, relative rotations occur between the first connecting plate 1 and the second connecting plate 2, between the third connecting plate 3 and the fourth connecting plate 4, and between the fifth connecting plate 5 and the sixth connecting plate 6, compensating for the angular displacement of the hull in the OX direction or the linear displacement in the OZ direction.

[0149] That is to say, when the hull undergoes a rolling motion (left - right swaying action), the sixth connecting plate 6 pitches relative to the third connecting plate 3, and the first connecting plate 1 pitches relative to the second connecting plate 2. By the deflection of the first connecting plate 1 and the sixth connecting plate 6, the stability of the lightering operation board (the main structure of the lightering operation) is maintained.

[0150] Moreover, the compensation of the lightering platform for the heaving motion of the berthed ship along the OZ direction can also be achieved by the hinge shafts between the first connecting plate 1 and the second connecting plate 2, between the third connecting plate 3 and the fourth connecting plate 4, and between the fifth connecting plate 5 and the sixth connecting plate 6. The compensation method is the same as that for the rolling motion of the ship.

[0151] 2. Compensation for pitching motion

[0152] The compensation of the transshipment platform for the pitching motion of the berthed vessel is achieved through the second bearing and the ball head slider 502 between the fourth connecting plate 4 and the fifth connecting plate 5 .

[0153] Specifically, 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 pitch motion around the OY direction, such as Figure 28 As shown. When the hull pitches, the fourth connecting plate 4 and the fifth connecting plate 5 rotate relative to each other to compensate for the angular displacement of the hull along the OY direction. That is to say, when the hull sways forward and backward, the fifth connecting plate 5 rotates around the second bearing, and the fifth connecting plate 5 performs forward and backward pitching motion relative to the fourth connecting plate 4. Through the deflection of the fifth connecting plate 5, the stability of the second connecting plate 2 and the third connecting plate 3 (the main structure of the transshipment operation) is maintained.

[0154] Specifically, when the pitching motion of the hull is compensated by the second bearing, the ball head slider 502 on the fifth connecting plate 5 slides with the second arc-shaped groove 401 on the fourth connecting plate 4; the displacement of the ball head slider 502 is limited by the length of the second arc-shaped groove 401, thereby limiting the rotation angle between the fifth connecting plate 5 and the fourth connecting plate 4.

[0155] In a specific embodiment of the present invention, in order to ensure better compensation for the pitching motion of the berthed vessel around the OY axis and reduce its impact on the transshipment operation, the fourth connecting plate 4 and the fifth connecting plate 5 and the second bearing therebetween should always be perpendicular to the sea level. Therefore, counterweights are added under the fourth connecting plate 4 and the fifth connecting plate 5 to maintain the fourth connecting plate 4 and the fifth connecting plate 5 in a vertical state.

[0156] 3. Compensation for yaw motion

[0157] The transfer platform has two groups of compensation mechanisms for the bow rolling motion of the berthed ship: one is the first bearing between the first connecting plate 1 and the berthing platform base 7, which is limited by the ball 701 and the first arc-shaped slide groove 102; the other is the connecting bearing 12 between the sixth connecting plate 6 and the berthing ship platform.

[0158] 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; the first bearing and the connecting bearing can realize the circumferential rotation between the first connecting plate 1 and the berthing platform base 7, and between the sixth connecting plate and the ship platform 13 in the horizontal direction, which can be used to compensate for the bowing motion of the ship around the OZ axis direction, such as Figure 29 shown.

[0159] 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 connecting plate 1 relative to the berthing platform base 7 and the circumferential rotation of the ship platform 13 relative to the sixth connecting plate 6, so as to maintain the stability of the second connecting plate 2 and the third connecting plate 3.

[0160] Furthermore, when the first connecting plate 1 rotates circumferentially relative to the berthing 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 berthing platform base 7 and the first connecting plate 1 can be restricted.

[0161] 4. Compensation for sway motion

[0162] The compensation for the sway motion of the berthed ship by the lightering platform is realized by the telescopic mechanism composed of the "first comb tooth structure 201 and the second comb tooth structure 301" between the second connecting plate 2 and the third connecting plate 3 to compensate for the change in the distance between the lightering platform and the ship platform 13, as Figure 25 shown.

[0163] 5. Compensation for surge motion

[0164] The compensation for the surge motion of the berthed ship by the lightering platform is realized by the gaps at the hinge axes between the first connecting plate 1 and the second connecting plate 2, and between the third connecting plate 3 and the fourth connecting plate 4 to compensate for the longitudinal allowance. The relative sliding of the first connecting plate 1 and the second connecting plate 2, and the third connecting plate 3 and the fourth connecting plate 4 along the first hinge axis and the second hinge axis compensates for the surge motion of the ship along the OX direction.

[0165] Specifically, there are gaps between the first connecting plate 1 and the second connecting plate 2 at the first hinge axis, between the third connecting plate 3 and the fourth connecting plate 4 at the second hinge axis, and between the fifth connecting plate 5 and the sixth connecting plate 6 at the third hinge axis; as Figure 26 shown, by setting the gaps, motion compensation can be carried out when the ship has a surge motion along the OX axis direction.

[0166] That is to say, the relative sliding of the first connecting plate 1 and the second connecting plate 2 along the first hinge axis, and the third connecting plate 3 and the fourth connecting plate 4 along the second hinge axis compensates for the surge motion of the ship along the OX direction.

[0167] Compared with the prior art, the beneficial effects of the technical solution provided in this embodiment at least include:

[0168] 1. The cross-bridge type offshore lightering platform of the present invention utilizes motion mechanisms such as the first bearing, the second bearing, the linear chute 202 and the slider 302, the hinge shaft, the connecting bearing 12, etc. For the six-degree-of-freedom swaying motion generated by the ship affected by wind, wave and current when the ship is moored at sea, it can passively compensate for the swaying motion of the ship, and then maintain 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.

[0169] 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 launching 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.

[0170] 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.

[0171] 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 cross-bridge type offshore lightering platform, characterized in that Including: A first connecting plate (1), a lightering operation plate, a sixth connecting plate (6), a berthing platform base (7) and a connecting bearing (12); One end of the first connecting plate (1) is hinged to one end of the lightering operation plate; the sixth connecting plate (6) is rotatably connected to the other end of the lightering operation plate; The bottom of the first connecting plate (1) is provided with a berthing platform base (7), and is slidably connected to the berthing platform (8) through the berthing platform base (7); A connecting bearing (12) is arranged on the lower surface of the sixth connecting plate (6), and the connecting bearing (12) can be inserted into a berthing projection (14) on the ship platform (13).

2. The cross-bridge type offshore lightering platform according to claim 1, wherein A set of locking supports (9) are symmetrically arranged on the side surface of the berthing platform base (7); the locking supports (9) are rotatably installed on the berthing platform base (7), and can be perpendicular to the berthing platform base (7) after being screwed out.

3. The cross-bridge type offshore lightering platform according to claim 2, characterized in that, One end of the lightering operation plate is provided with a locking groove; after the locking support (9) is screwed out from the berthing platform base (7), it can be snapped into the locking groove, thereby restricting the relative rotation between the first connecting plate (1) and the lightering operation plate.

4. The cross-bridge type offshore lightering platform according to any one of claims 1-3, characterized in that A locking pull rod (10) is arranged on the upper surface of the lightering operation plate; the locking pull rod (10) is rotatably installed on the lightering operation plate and can support the sixth connecting plate (6).

5. The cross-bridge type offshore lightering platform according to claim 4, wherein, A clamping groove is arranged on the sixth connecting plate (6), and a support column (603) is arranged in the clamping groove; an arc-shaped groove is arranged at the end of the locking pull rod (10); the support column (603) and the arc-shaped groove can be clamped and matched.

6. The cross-bridge type offshore lightering platform according to claim 5, characterized in that, A locking pin (11) is arranged on the sixth connecting plate (6); one end of the locking pin (11) is rotatably installed on the sixth connecting plate (6) and can be displaced relative to the sixth connecting plate (6); the other end of the locking pin (11) is provided with a protruding locking cylinder; the sixth connecting plate (6) is provided with a second locking hole (602) matching with the locking cylinder.

7. The cross-bridge type offshore lightering platform according to claim 6, characterized in that, When the locking cylinder is matched with the second locking hole (602), the sixth connecting plate (6) can rotate relative to the lightering operation plate; a first locking hole (303) is arranged on the lightering operation plate; when the locking cylinder is matched with the first locking hole (303), the sixth connecting plate (6) and the lightering operation plate cannot rotate relative to each other.

8. The cross-bridge type offshore lightering platform according to any one of claims 1-3, 5-7, characterized in that The outer ring of the connecting bearing (12) is fixedly connected to the sixth connecting plate (6).

9. The cross-bridge type offshore lightering platform according to claim 8, wherein A spline groove is arranged on the inner ring of the connecting bearing (12); the berthing projection (14) can be inserted and connected with the spline groove.

10. The cross-bridge type offshore lightering platform according to any one of claims 1-3, 5-7, and 9, characterized in that, A T-shaped sliding rail (702) is arranged on the berthing platform base (7); a T-shaped sliding groove (801) is arranged on the berthing platform (8); the T-shaped sliding rail (702) is slidably installed in the T-shaped sliding groove (801).

Images