Ship docking retention device for offshore structure

Abstract

The present invention provides a ship docking retention device for an offshore structure, the device controlling a height-adjusting member and a surge damping member by means of a control unit such that a gangway can continuously retain a docking point without being influenced by water level fluctuation during rolling caused by waves and swells when a ship is docked at an offshore structure, and thus the docking point is continuously retained without being influenced by water level fluctuation caused by waves and swells when the ship is docked to the offshore structure, thereby enabling a worker to stably move to the structure.

Description

Berthing device for vessels used for offshore structures

[0001] The present invention relates to a device for maintaining berthing of a ship for use in a marine structure, which enables a gangway to continuously maintain a berthing point without being affected by surface motion when a ship is berthed to a marine structure and is subject to sway due to waves and swells by controlling the height adjustment member and the sway damping member by a control unit, thereby enabling a worker to move to the structure safely by continuously maintaining a berthing point without being affected by surface motion when the ship is berthed to a marine structure.

[0002]

[0003] To operate and maintain offshore structures such as offshore observation stations or offshore wind turbines, operators and maintenance personnel must access the structures via ships.

[0004] At this time, the existing access structure for accessing offshore structures via ships consists of a ship mooring platform and a ladder for climbing up to the platform, so the ship approaches the cylindrical mooring platform and then climbs up the fixed ladder to climb up to the platform.

[0005] However, because the water surface is turbulent due to waves and swells, it is not easy to climb onto a fixed ladder from a ship that rises and falls with the water surface turbulence, and there is considerable risk of accidents when the waves are high.

[0006] Therefore, in order to climb onto the platform of an offshore structure using the existing access structure, the number of days available for access is very limited because the sea surface must be very calm and the weather must be clear.

[0007] An example of such offshore structures is an offshore wind turbine.

[0008] Offshore wind farms are generally developed on a large scale, with the number of structures ranging from tens to hundreds, requiring frequent access to the structures. Therefore, methods for safe and easy access in such maritime conditions are required.

[0009] Maintenance of wind turbines is essential for generating significant power from offshore wind farms. However, without effective maintenance, operational efficiency inevitably declines, leading to a corresponding reduction in power production. Therefore, to increase the profitability of large-scale offshore wind power projects, a maintenance system capable of responding to unexpected situations is essential.

[0010] To solve the above-mentioned problem, a “berthing facility for offshore wind power generation equipment” is disclosed in Korean Patent Publication No. 10-1029771 (announced on April 19, 2011).

[0011] Referring to FIG. 1, the offshore wind turbine (200) includes a blade (210) facing the wind, a power transmission device (220) coupled with the blade (210) and driven as the blade (210) rotates, a generator (230) coupled with the power transmission device (220) to generate electricity, and a tower (240) installed vertically on the sea to support the blade (210), the power transmission device (220), and the generator (230).

[0012] On one side of the above tower (240), a docking structure (250) is formed to allow a ship loaded with personnel and equipment for repairing the above offshore wind turbine (200) to dock.

[0013] The protrusion of the ship is inserted into the above-mentioned docking structure (250), so that the ship is docked adjacent to the tower, and personnel on board the ship can climb up the tower (240) by climbing a ladder (260) formed on one side of the tower (240) to maintain the offshore wind turbine (200).

[0014] However, since the specifications of the tower and the berthing structure formed on one side of the tower are not consistent for offshore wind turbines installed at sea, there was a problem in that a ship with a fixed protrusion that was aligned with the berthing structure of one side of the tower could not berth with the berthing structure of the other side of the tower that had a different specification.

[0015] In addition, various conventional docking devices known in the art, including the above-mentioned prior art, only include a configuration for simply fixing the docking facility to the tower, and cannot solve the problem of the docking structure not being able to continuously maintain the docking point due to the influence of water surface fluctuations caused by waves and swells.

[0016]

[0017] The present invention was invented to solve the above problems, and its purpose is to provide a berthing maintenance device for a ship for use in offshore structures, which allows a ship to continuously maintain a berthing point without being affected by surface fluctuations caused by waves and swells when berthing an offshore structure, thereby allowing a worker to move to the structure in a stable manner.

[0018]

[0019] For the above purpose, the present invention provides a berthing device for berthing a vessel to a marine structure, comprising: a plate-shaped fixed plate fixedly installed on a bow deck of the vessel; an elevating plate disposed above the fixed plate; a height adjusting member provided to be rotatable up and down so as to adjust the height of the elevating plate spaced apart from the fixed plate between the fixed plate and the elevating plate; a gangway disposed above the elevating plate; a pitching damping member installed between the elevating plate and the gangway, which rotates the gangway in a reverse direction about the Y-axis from the fixed plate when pitching occurs due to waves and swells to damp the generated pitching; a pitching amount measuring member mounted on the gangway and configured to detect pitching due to waves and swells and measure the amount of pitching using an IMU (Inertial Measurement Unit) sensor equipped with RTK (Real Time Kinematic) and GNSS (Global Navigation Satellite System) functions; It is characterized by including a control unit that compares the value measured through the above-mentioned sway amount measuring unit with a preset value and controls the height adjustment unit and / or the sway damping unit through an EHA (Electro Hydraulic Actuator) system so that the gangway can continuously maintain the berthing point even when sway occurs due to waves and swells.

[0020] In addition, in the present invention, the height adjustment member includes an 'X' shaped lift arm, each of which has both ends hingedly connected to the fixed plate and the lifting plate, and which is provided to be foldable or expandable via a hinge axis provided on one side, and a driving member connected between the lift arms and driving the lift arm to be folded or expanded, and the lifting plate is characterized in that when the lift arm is folded by the driving member, the height of the lifting plate spaced apart from the fixed plate decreases, and when the lift arm is expanded by the driving member, the height of the lifting plate spaced apart from the fixed plate increases.

[0021] In addition, the height adjustment member of the present invention is characterized in that the lift arms provided in a plurality are mutually continuously connected and linked to each other along the height direction so as to be folded or expanded in the vertical direction, thereby enabling the elevation height of the gangway to be adjusted.

[0022] In addition, the present invention is characterized in that it comprises an angle-adjusting actuator including a hinge axis having one end hinged to one side of the upper surface of the elevating plate and the other end hinged to the bottom surface of the gangway, and the sway damping member is disposed between the elevating plate and the gangway, and has a body part having one end hinged to the upper surface of the elevating plate, and a rod having one end hinged to the bottom surface of the gangway and adjusting the angle of the gangway while being introduced or withdrawn from the body part, so that when sway occurs due to waves and swells, the gangway can be rotated about the hinge axis by the rod introduced or withdrawn from the body and continuously maintain a berthing point.

[0023]

[0024] The present invention, as described above, allows the height adjustment member and the sway damping member to be controlled by a control unit when a vessel is berthed to an offshore structure and is subject to sway due to waves and swells, thereby allowing the gangway to continuously maintain the berth point without being affected by the water surface sway. Accordingly, when berthing for maintenance of offshore structures such as offshore wind turbines, personnel can easily access the offshore structure, significantly shorten the work time, and protect workers from various safety accidents.

[0025]

[0026] Figure 1 is an example of a berthing facility for a marine structure according to the prior art.

[0027] Figure 2 is a perspective view showing a folded state of a lift arm of a berthing maintenance device for a ship for offshore structures according to the present invention.

[0028] Figure 3 is a perspective view showing a state in which a lift arm of a berthing maintenance device for a ship for offshore structures according to the present invention is expanded.

[0029] Figure 4 is a front view showing the lift arm of the berthing maintenance device for a ship for offshore structures according to the present invention in a folded state.

[0030] Figure 5 is a front view showing the lift arm of the berthing maintenance device for a ship for offshore structures according to the present invention in an expanded state.

[0031] Figure 6 is a side view showing the lift arm of the berthing maintenance device for a ship for offshore structures according to the present invention in a folded state.

[0032] Figure 7 is a side view showing the lift arm of the berthing maintenance device for a ship for offshore structures according to the present invention in an expanded state.

[0033] Hereinafter, the berthing device for a vessel for offshore structures according to the present invention will be described in more detail with reference to the attached drawings. In the description with reference to the attached drawings, identical or corresponding components are assigned the same drawing numbers, and redundant descriptions thereof will be omitted.

[0034]

[0035] The present invention discloses a docking device that can continuously maintain a docking point for a marine structure when a ship is docked to a marine structure and is subject to sway due to waves and swells for maintenance of the marine structure, thereby allowing workers to move to the structure safely, ensuring the safety of workers during maintenance work, and in particular, significantly reducing the installation space when installed on the bow side of a ship, and enabling lightweight construction.

[0036]

[0037] FIGS. 2 and 3 are perspective views illustrating a state in which a lift arm is folded or expanded in a berthing device for a marine structure vessel according to the present invention, wherein the berthing device comprises: a plate-shaped fixed plate (10) fixedly installed on a bow deck of the vessel; an elevation plate (20) arranged on an upper side of the fixed plate (10); a height adjusting member (30) provided between the fixed plate (10) and the elevation plate (20) so as to be rotatable in the up-and-down direction so as to adjust the height of the elevation plate (20) spaced apart from the fixed plate (10); a gangway (40) arranged on an upper side of the elevation plate (20); A pitching damping member (50) installed between the above-mentioned lifting plate (20) and the gangway (40) to dampen the pitching caused by waves and swells by rotating the gangway (40) in the reverse direction around the Y-axis from the above-mentioned fixed plate (10) when pitching occurs; and a pitching amount measuring member installed on the gangway (40) to detect pitching caused by waves and swells and measure the amount of pitching using an IMU (Inertial Measurement Unit) sensor equipped with RTK (Real Time Kinematic) and GNSS (Global Navigation Satellite System) functions; It includes a control unit that compares the value measured by the above-mentioned sway amount measuring unit with a preset value and controls the height adjustment unit (30) and / or the sway damping unit (50) through an EHA (Electro hydraulic actuator) system so that the gangway (40) can continuously maintain the berthing point even when sway occurs due to waves and swells.

[0038] First, the above-mentioned fixed plate (10) is a member for installing the anchoring device according to the present invention on the bow deck of a ship, and may be formed as a square or rectangular plate having a predetermined area and thickness, and is fixed through fasteners such as bolts and nuts or fixedly installed on the bow deck of a ship through welding.

[0039] An elevation plate (20) is placed on the upper side of the above fixed plate, and a height adjustment member (30) is installed between the above fixed plate (10) and the elevation plate (20).

[0040] The above-mentioned lifting plate (20) can support the gangway (40) described later, and is preferably formed of a square or rectangular plate having a predetermined area and thickness so as to withstand the load caused by workers moving toward the offshore structure through the gangway (40).

[0041] The above height adjustment member (30) is a member that is provided so as to be rotatable in the up-and-down direction between the fixed plate (10) and the lifting plate (20) and adjusts the height of the lifting plate (20) spaced apart from the fixed plate (10) to vary the height of the gangway (40) to be described later.

[0042] FIG. 4 and FIG. 5 are front views showing a state in which a lift arm is folded or expanded in a berthing device for a marine structure according to the present invention, wherein the height adjustment member (30) includes an 'X'-shaped lift arm (31) provided so that both ends are hinge-connected to the fixed plate (10) and the lifting plate (20), respectively, and can be folded or expanded via a hinge axis provided on one side, and a driving member (32) connected between the lift arm (31) and driving the lift arm (31) to be folded or expanded, and the lifting plate (20) is configured such that when the lift arm (31) is folded by the driving member (32), the height of the lifting plate (20) spaced apart from the fixed plate (10) decreases, and when the lift arm (31) is expanded by the driving member (32), the height of the lifting plate (20) spaced apart from the fixed plate (10) decreases. The height of the lifting plate (20) can be increased.

[0043] The above lift arm (31) is formed in an 'X' shape in which a pair of link members are crossed to be foldable or expandable via a hinge axis, and one end is hinge-connected to the upper surface of the fixed plate (10) and the lower surface of the elevating plate (20), and a driving wheel is provided at the other end. The driving wheel is in contact with the upper surface of the fixed plate (10) and the lower surface of the elevating plate (20).

[0044] The above driving member (32) can be formed in various ways. For example, the driving member can be formed as a telescopic cylinder composed of a plurality of cylinders that can overlap each other to allow the lifting plate (20) to be raised and lowered. Alternatively, the lifting plate (20) can be raised and lowered by sequentially protruding the second and third axles by a motor.

[0045] However, in the case above, the elevation height of the lifting plate (20) may be limited. Of course, if the length of the link member is secured, the elevation height of the lifting plate (20) can be secured, but as the length of the link member increases, there may be a limitation that the installation area must be expanded.

[0046] Accordingly, the height adjustment member (30) according to the present invention is configured with a plurality of lift arms (31), and each lift arm (31) is continuously connected and linked to each other along the height direction so that it can be folded or expanded in the vertical direction, thereby improving the elevation height of the lifting plate (20) and gangway (40).

[0047] In addition, the driving member (32) according to the present invention can be implemented as a hydraulic cylinder and an electric motor that connect a plurality of lift arms (31) diagonally. However, in the case of the existing hydraulic system, compared to the electric device, large-scale equipment and hydraulic piping are required, so a large system installation space is required and the configuration is complex, which reduces maintainability, and a control valve is used for pressure adjustment during control, but there is a problem that the energy transfer efficiency is reduced due to the use of this valve.

[0048] Accordingly, the present invention has the advantage of being able to realize system simplification and miniaturization by applying a hydraulic system that integrates devices such as an electric motor and a hydraulic pump, i.e., a design that minimizes control systems and enables rapid response through the application of an EHA (Electro Hydraulic Actuator), and does not require cumbersome hydraulic piping work, and has the feature of being greatly simplified in terms of maintenance compared to existing systems due to its simple structure.

[0049] In addition, by controlling using a simplified hydraulic system, speed and torque control is performed through an electric motor, which greatly improves energy transfer efficiency compared to existing systems, and enables control of hydraulic actuators with high pressure and fast controllability, enabling the realization of advanced control functions and power performance.

[0050] For example, the hydraulic system of the present invention is provided with an oil tank, an electric motor, a directional control valve, a check valve, and a hydraulic cylinder (actuator), and a central controller (control unit) receives movement information from a sensor connected to the hydraulic cylinder and the central controller, controls the electric motor, and executes pressure and directional control commands for the directional control valve.

[0051]

[0052] Meanwhile, the present invention may be provided with a first LM guide rail installed along the longitudinal direction on one side of the upper surface of the fixed plate (10), and a first LM block that moves along the first LM guide rail may be provided. In addition, a second LM guide rail may be installed on the lower surface of the elevating plate (20) to correspond to the first LM guide rail, and a second LM block that moves along the second LM guide rail may be provided.

[0053] Next, the lift arm may be composed of a first lift arm, a second lift arm, a third lift arm, and a fourth lift arm, and each may be provided as a pair and arranged along both edges of the fixed plate.

[0054] For example, the first lift arm may have a first fixed member, one end of which is hingedly connected to the first LM block, and a first adjusting member, one end of which is hingedly connected to the upper surface of the fixed plate, intersecting each other in an 'X' shape, and the portion where the first fixed member and the first adjusting member intersect each other may be connected via a first hinge axis.

[0055] Next, the second lift arm may have a second fixed member, one end of which is hinge-connected to the first fixed member, and a second adjustable member, one end of which is hinge-connected to the first adjustable member, intersecting each other in an 'X' shape, and the portion where the second fixed member and the second adjustable member intersect each other may be connected via a second hinge axis.

[0056]

[0057] Next, the third lift arm may have a third fixed member, one end of which is hingedly connected to the second fixed member, and a third adjustable member, one end of which is hingedly connected to the second adjustable member, intersecting each other in an 'X' shape, and the portion where the third fixed member and the third adjustable member intersect each other may be connected via a third hinge axis.

[0058] Next, the fourth lift arm may have a fourth fixed member having one end hinged to the third fixed member and the other end hinged to the bottom surface of the lifting plate, and a fourth adjustment member having one end hinged to the third adjustment member and the other end hinged to the second LM block, which intersect each other in an 'X' shape, and the portion where the fourth fixed member and the fourth adjustment member intersect each other may be connected via a fourth hinge axis.

[0059] In addition, a first hinge bracket may be installed between the pair of first lift arms, which is arranged parallel to the bottom surface of the bow and hinge-coupled to the first hinge axis, and a first drive motor may be installed on one side of the first hinge bracket. Here, the first drive motor may be an electric motor. For example, the first drive motor may be arranged parallel to the bottom surface of the bow on the lower surface of the first hinge bracket, and the rotational axis of the first drive motor may vertically penetrate the first hinge bracket and protrude upward. In addition, although not shown in the drawing, the rotational axis of the first drive motor may have screw threads formed along the outer circumferential surface.

[0060] In addition, a second hinge bracket is installed between the pair of second lift arms, which is arranged parallel to the bottom surface of the player and hinge-coupled with the second hinge axis, and a first lifting shaft may be coupled to one side of the second hinge bracket. For example, the first lifting shaft may be coupled in a form that vertically penetrates the second hinge bracket, and a screw hole (not shown) having a screw thread formed along the inner surface so as to be screw-coupled with the rotational axis of the first drive motor may be formed inward from the bottom surface at a predetermined height.

[0061] In addition, a fourth hinge bracket hinged to the fourth hinge axis may be installed parallel to the bottom surface of the bow between the pair of fourth lift arms, and a second drive motor may be installed on one side of the fourth hinge bracket. Here, the second drive motor may be an electric motor. For example, the second drive motor may be arranged parallel to the bottom surface of the bow on the upper surface of the fourth hinge bracket, and the rotational axis of the second drive motor may vertically penetrate the fourth hinge bracket and protrude downward. In addition, although not shown in the drawing, the rotational axis of the second drive motor may have screw threads formed along the outer circumferential surface.

[0062] In addition, a third hinge bracket is installed between the pair of third lift arms, which is arranged parallel to the bottom surface of the player and hinge-coupled with the third hinge axis, and a second lifting shaft may be coupled to one side of the third hinge bracket. For example, the second lifting shaft may be coupled in a form that vertically penetrates the third hinge bracket, and a screw hole (not shown) having a screw thread formed along the inner surface so as to be screw-coupled with the rotational axis of the second drive motor may be formed inward from the bottom surface at a predetermined height.

[0063] In addition, the present invention may provide a separate controller (not shown) for manual control of the first and second driving motors, and the first and second driving motors may be electrically connected to the control unit so that the first and second driving motors can be automatically controlled by the control unit.

[0064] For example, when a ship is close to a marine structure, and a worker detects the state of the water's sway and then manually controls the first and second drive motors through the controller to raise the gangway to a predetermined height, the height value at which the gangway is placed by the worker's arbitrary operation is transmitted to the control unit as a reference value, and when the control by the user is completed, the control unit compares the amount of sway measured by the sway amount measuring member with the received reference value and then transmits a control signal to the first and second drive motors for varying the height of the gangway. The first and second drive motors are rotated in the forward or reverse direction by the control signal from the control unit, and the first elevation shaft and the second elevation shaft are raised or lowered along the axial direction by the rotational force of the first and second drive motors, respectively. Here, when the first lifting shaft is raised, the second hinge bracket is raised by the first lifting shaft, the second lift arm is extended, and the first adjusting member connected to the second adjusting member slides to one side, thereby causing the first hinge bracket to be raised and the first lift arm to be extended. In addition, the third hinge bracket and the fourth hinge bracket are rotated by the second lifting shaft that rotates simultaneously with the first lifting shaft, thereby causing the third lift arm and the fourth lift arm to be extended simultaneously. At this time, the controller may be provided in the gangway so that a worker can directly operate the controller while boarding the gangway to operate the height of the gangway. In addition, the controller may be separately provided in the ship so that a second worker on the ship can operate the height of the gangway through the controller while a first worker is boarding the gangway, or in the event of an emergency, the second worker can operate the controller to enable a quick response, thereby ensuring the safety of the first worker.

[0065]

[0066] Next, the gangway (40) is arranged on the upper side of the lifting plate, and is a member that provides a path for workers inside the ship to move toward the offshore structure. It may be formed of a plate-shaped plate having a predetermined width and length, and a handrail for the safety of workers may be vertically provided along the longitudinal edges on both sides.

[0067] The above-mentioned pitching damping member (50) is a member installed between the fixed plate and the gangway, and when pitching occurs due to waves and swells, it rotates the gangway in the reverse direction around the Y-axis from the fixed plate to dampen the generated pitching.

[0068]

[0069]

[0070] First, the present invention is provided with a hinge shaft in which one end is hinged to one side of the upper surface of the lifting plate (20) and the other end is coupled to the lower surface of the gangway (40).

[0071] In addition, in the present invention, the sway damping member (50) may be formed as an angle-adjusting actuator including a body part (50-1) that is vertically arranged between the lifting plate (20) and the gangway (40), one end of which is hinged to the upper surface of the lifting plate (20), and a rod (50-2) that is hinged to the lower surface of the gangway (40) and adjusts the angle of the gangway (40) while being introduced or withdrawn from the body part.

[0072] As described above, the gangway (40) is hinge-connected to the lifting plate (20) via the hinge axis (51), so that when a sway occurs due to waves and swells, the rod (50-2) of the angle adjustment actuator is drawn in or out, thereby rotating the gangway (40) along the Y-axis with respect to the hinge axis, thereby easily reducing the sway that occurs, and thereby enabling the gangway (40) to stably and continuously maintain the berthing point.

[0073] Next, the above-described sway amount measuring member (not shown) is a member that is mounted on the gangway to detect sway caused by waves and swells and measure the sway amount. It may be an MRU (Motion Reference Unit) sensor that detects sway according to the height of the waves using an acceleration detection sensor provided inside and transmits the detected sway to the control unit.

[0074] In addition, the above-mentioned motion measurement member can secure height accuracy by applying an IMU (Inertial Measurement Unit) sensor equipped with RTK (Real Time Kinematic) and GNSS (Global Navigation Satellite System) functions.

[0075] Conventional IMU sensors with built-in GNSS have the disadvantage of being unsuitable for controlling miniatures due to low height accuracy. However, in the case of the present invention, by applying RTK together, centimeter-level position accuracy is secured, and it is configured to obtain high-precision position results.

[0076] The above control unit (not shown) controls the height adjustment member and / or the pitch damping member so that the gangway can continuously maintain the berthing point when agitation due to waves and swells occurs. For example, when a ship heaves or pitches due to waves and swells, the berthing point of the gangway may change. At this time, the control unit compares the value measured by the yaw amount measuring member with a preset value, and then, if an error occurs, controls the height adjustment member and / or the pitch damping member to compensate for the heave or pitch movement of the ship, thereby controlling the berthing point of the gangway to continuously maintain. Meanwhile, the rolling motion causes less agitation because the motor applies force toward the offshore structure when the ship berths on the offshore structure.

[0077] In addition, the existing control unit has limitations in algorithm responsiveness, input / output responsiveness, etc., and has the disadvantage of not being able to apply complex algorithms because it uses a low-cost microprocessor (8bit 16MHz AVR), but in the case of the present invention, by using a high-performance DSP (32bit 90MHz DSP), it has improved performance by at least 6 times and can improve control responsiveness by about 2 times or more compared to the existing one.

[0078] Meanwhile, the "berthing maintenance system of a ship for offshore structures" disclosed in Korean Patent Publication No. 10-2137150 by the applicant of the present invention, which enables a gangway to stably maintain a berthing point for an offshore structure, includes a drive unit composed of a roll cylinder for reducing roll caused by waves and swells, a pitch cylinder for reducing pitching, and a surge cylinder for reducing forward and backward rolling. The roll cylinder, pitch cylinder, and surge cylinder are hydraulic cylinders, and a hydraulic line, a hydraulic tank, a pump, a control valve, etc. must be provided to supply working fluid to each cylinder. In addition, an accumulator must be installed as a buffer device to absorb the sudden impact pressure of the working fluid supplied to each cylinder. Therefore, sufficient space must be allocated to install the system on the bow deck, and it may be difficult to transport and install heavy components to the bow deck.

[0079] The present invention does not use a hydraulic cylinder as a member for adjusting the height of the gangway or reducing the sway compared to the aforementioned driving unit, so that a separate hydraulic line, hydraulic tank, pump, control valve, accumulator, etc. can be omitted, thereby drastically reducing the installation space, and while saving cost, time, and manpower during installation, it can provide the effect of allowing the gangway to stably and continuously maintain the berthing point when swaying occurs due to waves and swells.

[0080]

[0081] The present invention described above is merely exemplary, and those skilled in the art will readily appreciate that various modifications and equivalent other embodiments are possible. Therefore, it will be readily understood that the present invention is not limited to the forms mentioned in the detailed description above. Accordingly, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims. Furthermore, the present invention should be understood to include all modifications, equivalents, and alternatives within the spirit and scope of the present invention as defined by the appended claims.

[0082]

[0083] Explanation of the sign

[0084] 10: Fixed plate 20: Elevating plate

[0085] 30: Height adjustment member

[0086] 31: Lift arm 32: Drive member

[0087] 40: Gangway

[0088] 50: Damping member for longitudinal vibration

[0089] 50-1: Body 50-2: Rod

Claims

1. In a berthing device for mooring a ship to a marine structure, A plate-shaped fixed plate (10) fixedly installed on the bow deck of the above ship; An elevating plate (20) placed on the upper side of the above fixed plate; A height adjustment member (30) that is provided to be rotatable in the up-and-down direction so as to adjust the height of the elevation plate spaced apart from the fixed plate between the fixed plate and the elevation plate; A gangway (40) arranged on the upper side of the above-mentioned lifting plate; A pitching damping member (50) installed between the above-mentioned lifting plate and the gangway, which reduces the pitching caused by waves and swells by rotating the gangway in the reverse direction around the Y-axis from the above-mentioned fixed plate; A motion measurement member that is mounted on the above gangway and detects motion caused by waves and swells and measures the amount of motion through an IMU (Inertial Measurement Unit) sensor equipped with RTK (Real Time Kinematic) and GNSS (Global Navigation Satellite System) functions; A berthing maintenance device for a ship for offshore structures, characterized in that it includes a control unit that compares a value measured by the above sway amount measuring unit with a preset value and controls the height adjustment unit and / or the sway damping unit through an EHA (Electro Hydraulic Actuator) system so that the gangway can continuously maintain the berthing point even when sway occurs due to waves and swells.

2. In paragraph 1, The height adjustment member includes an 'X' shaped lift arm, each of both ends of which is hinge-connected to the fixed plate and the lifting plate, and which is provided to be folded or expanded via a hinge axis provided on one side, and a driving member connected between the lift arms and driving the lift arm to fold or expand, A berthing maintenance device for a ship for offshore structures, characterized in that the height of the berthing plate spaced apart from the fixed plate decreases when the lift arm is folded by the driving member, and the height of the berthing plate spaced apart from the fixed plate increases when the lift arm is expanded by the driving member.

3. In paragraph 2, A berthing maintenance device for a ship for offshore structures, characterized in that the height adjustment member is provided in multiple pieces, and the lift arms are continuously connected and linked to each other along the height direction so that they can be folded or expanded in the up-and-down direction, thereby adjusting the rising height of the gangway.

4. In paragraph 1, A hinge shaft is provided, one end of which is hinged to one side of the upper surface of the above-mentioned lifting plate and the other end of which is hinged to the bottom surface of the above-mentioned gangway. The above-mentioned sway damping member is composed of an angle-adjusting actuator including a body part arranged between the lifting plate and the gangway, one end of which is hingedly connected to the upper surface of the lifting plate, and a rod whose one end is hingedly connected to the lower surface of the gangway and which adjusts the angle of the gangway by being introduced or withdrawn from the body part. A berthing maintenance device for a ship for offshore structures, characterized in that the gangway can be rotated around a hinge axis by a load drawn in or out from the body when a sway occurs due to waves and swells, thereby continuously maintaining the berthing point.

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