296 results about "Gangway" patented technology

A joint simulation and operation operability evaluation method based on wind power operation and maintenance ship motion dynamic response and active compensation gangway ladder motion control comprises the steps that an operation and maintenance ship frequency domain seakeeping model is built, and a hydrodynamic coefficient library is calculated; wave exciting force is reconstructed based on a Cummins time domain motion equation, and ship motion response prediction is realized by adopting implicit generalized alpha time domain composite integral; the dynamic positioning system extracts low-frequency motion through a Kalman filter and optimizes thruster thrust distribution to stabilize the position of the ship. A gangway ladder dynamic model is established based on a Lagrange equation, real-time control over displacement, speed and acceleration of the top end of the gangway ladder is achieved through a feedforward-feedback composite control strategy, and nonlinear output of a hydraulic actuator is optimized. And realizing joint simulation of the coupling system through time domain synchronization and self-adaptive PID (Proportion Integration Differentiation) control. And checking gangway ladder movement based on a preset threshold value and a space boundary condition, and evaluating the operability of the climbing operation. According to the method, the limitation of traditional single-disciplinary analysis is broken through, and the forecasting precision of wind power operation and maintenance operation operability is effectively improved.

The invention discloses a hierarchical cooperative motion control method for a ship dynamic positioning and wave compensation embarkation system. The method comprises the following steps: acquiring historical motion data of a ship; the historical motion data of the ship are fused, and the current ship posture and speed are obtained; the prediction model generates a predicted value of the disturbance of the ship in the future preset time; extracting to obtain a low-frequency slow drift motion component; the total output force of the thruster is calculated, and the ship dynamic positioning system controls the thruster to work based on the total output force of the thruster so as to compensate the low-frequency slow drift motion component; a Stewart platform in the wave compensation embarkation system controls supporting legs to work based on the target lengths of the supporting legs so as to compensate low-frequency motion left after compensation of the ship dynamic positioning system and high-frequency motion which is not compensated; and residual disturbance after the Stewart platform is compensated is compensated through the gangway ladder. According to the invention, an energy distribution mode that low-frequency disturbance is compensated by a ship dynamic positioning system and high-frequency disturbance is compensated by a wave compensation embarkation system can be realized.

The invention provides a compensation control method and device for sea waves, electronic equipment and a storage medium, and relates to the technical field of artificial intelligence. According to the compensation control method for the sea waves, the expansion amount, the rotation angle, the pitching angle and the displacement amount of each driving cylinder are restrained through position data and posture data; therefore, precise control over the telescopic amount, the rotation angle, the pitching angle and the displacement amount of each driving cylinder is achieved. The method comprises the following steps: acquiring position data and attitude data of a ship body where a hybrid embarkation mechanism is located, and performing motion distribution on the expansion amount of each driving cylinder of a six-degree-of-freedom parallel mechanism on the hybrid embarkation mechanism and the rotation angle, the pitching angle and the displacement amount of a three-degree-of-freedom series gangway ladder, so that the hybrid embarkation mechanism is controlled in a data driving mode; the compensation precision of the sea wave compensation system of the series-parallel connection embarkation mechanism is improved, and the sea wave compensation system has high adaptability and can be applied to various series-parallel connection mechanisms of different types.

A sidewall suitable for a gangway comprises a first panel that provides a first gangway end; a second panel that provides a second gangway end, the second gangway end being opposite the first gangway end; a retractable rail comprising a first rail end that is connected to the first panel and that has a second rail end opposite the first rail end, wherein the second rail end is connected to the second panel, wherein the retractable rail extends along a longitudinal axis; and wherein a cover is attached to the rail and extending along the rail, the cover having a flexible portion that extends from the rail into a direction perpendicular to the longitudinal axis.

The invention discloses a transverse wave motion compensation mechanism for an offshore platform personnel embarkation gangway ladder, which comprises an offshore platform fixing frame, an embarkation ladder and a ship body, the embarkation ladder and the ship body are arranged on the front side of the offshore platform fixing frame, and the front side of the offshore platform fixing frame is fixedly connected with a plurality of traffic ship berthing rubber fenders. By arranging a series of structures, the lifting gangway ladder can be conveniently and accurately compensated left and right in a mode that friction measurement is matched with active distance control driving when a ship body swings left and right, so that the lifting gangway ladder and the ship body move left and right consistently to form a relative static effect, and the phenomenon that people fall off easily due to large inertia caused by direct movement to static is reduced; a person can conveniently and stably climb to the lifting gangway ladder, the use stability is improved, hard impact force generated by instant movement can be conveniently and elastically buffered and unloaded during movement compensation, compensation work is more flexible and stable, discomfort is reduced, the comfort of the person during initial climbing is improved, and the service life of the person is prolonged. In addition, the buffering damping force and the elastic swing amplitude balance can be adjusted accurately, and the using effect is further improved.

The invention discloses a marine gangway ladder preset time autonomous lap joint control system and a working method thereof. The system comprises an inertial measurement unit and a main control computer; the binocular camera is adopted, multi-sensor fusion is not needed, accurate lap joint point position information is directly obtained, and the method is simple and easy to implement; according to the provided preset-time autonomous lap joint control method, the system adjusting time can be set in advance, and operation and maintenance ship movement caused by waves is efficiently compensated by driving the swing mechanism, the pitching mechanism and the telescopic mechanism to cooperatively move, so that the front end of the offshore gangway ladder accurately follows the expected position of an upper lap joint point in time; the offshore accommodation ladder is lapped to the offshore wind turbine platform within the set lapping time, so that efficient and autonomous lapping of the offshore accommodation ladder and the offshore fixed or floating wind turbine platform is ensured, and the lapping efficiency is improved; the front end of the offshore gangway ladder is in non-contact lap joint with the lap joint point of the offshore wind turbine platform, no special requirement for the lap joint point exists, a landing device does not need to be built, and the maintenance and manufacturing cost of the gangway ladder is reduced.

The invention discloses a test verification platform and a test verification method for a motion compensation gangway ladder of an offshore wind power operation and maintenance ship. The platform comprises a system calculation and control center, an environment simulation vibration platform, an active motion compensation execution mechanism, a high-precision sensing and sensing module, a multi-channel data acquisition and storage system, an offshore wind turbine target platform module and an optical motion capture module. The platform reproduces six-degree-of-freedom motion of the operation and maintenance ship through integrated cooperation and high fidelity, simulates active compensation of a gangway ladder and dynamic characteristics of a hydraulic system, and accurately measures key parameters such as poses, forces / torques and the like by using multiple sensors and an optical capture technology. The method comprises the steps of motion instruction synthesis, platform motion reproduction, compensation action simulation, data synchronous acquisition and performance evaluation. According to the invention, high-precision land simulation verification of ship-gangway ladder-fan dynamic coupling is realized, the problems of high cost, high risk and poor repeatability of offshore actual measurement are effectively solved, and a reliable and efficient solution is provided for performance verification of a motion compensation system.

The invention discloses six-degree-of-freedom wave compensation embarkation equipment suitable for complex sea conditions and a control method of the six-degree-of-freedom wave compensation embarkation equipment. The six-degree-of-freedom wave compensation embarkation equipment comprises a base platform fixed to an operation ship deck; a lower platform of the Stewart parallel mechanism is connected with the base platform, and an upper platform of the Stewart parallel mechanism is connected with the lower platform through six hydraulic cylinders; the embarkation gangway ladder system is mounted on the upper platform; the hydraulic servo driving system is used for driving the six hydraulic cylinders; the intelligent sensing system is used for collecting ship motion data and relative pose data of the target platform; the intelligent control system is electrically connected with the hydraulic servo driving system and the intelligent sensing system; wherein the intelligent control system is configured to execute a compound control algorithm based on a nonlinear extended state observer and nonlinear model predictive control so as to drive the hydraulic servo driving system and compensate ship motion. The embarkation equipment provided by the invention has the advantages of high precision, high stability and strong robustness, and can realize accurate and stable compensation of complex sea conditions.

A gangway for use with a container to be accessed is provided. The gangway comprises a fixed platform and a support structure connected to the fixed platform in a manner that allows the support structure to rotate with respect to the fixed platform between a raised stowed position and a lowered deployed position. An end platform is pivotally connected at the distal end of the support structure, the end platform defining an upper walking surface and a bottom surface that engages the top of the container, the height between the bottom surface and the walking surface being no greater than one inch.

To improve work efficiency.SOLUTION: A jacket structure system includes a first jacket structure capable of supporting an offshore wind turbine, a second jacket structure capable of supporting an offshore wind turbine, and a gangway spanning the first jacket structure and the second jacket structure. The first jacket structure has a first external work floor. The second jacket structure has a second external work floor. The gangway spans between the first external work floor and the second external work floor so that a worker can move between the first external work floor and the second external work floor.SELECTED DRAWING: Figure 1

The invention relates to a gangway ladder with a wave compensation function and a flexible control method thereof, and belongs to the field of gangway ladders. The device specifically comprises a gangway ladder, a wave compensation platform system, a measuring system and a control module. The gangway ladder comprises a fixed gangway ladder, a movable gangway ladder, a gangway ladder telescopic actuator and an abutting device. The wave compensation platform system sequentially comprises a platform base, a six-rod parallel actuator, a six-degree-of-freedom platform surface, a gangway ladder rotating mechanism, a gangway ladder rotating platform and a gangway ladder pitching actuator from bottom to top. In the process of wave compensation, active heave compensation is cooperatively compensated by the pitching actuator and the six-bar parallel actuator, the efficiency of the six-bar parallel actuator and the efficiency of the pitching actuator are both considered in the cooperative compensation, and the flexibility is high. According to the cooperative compensation mode, the redundancy of heave compensation is improved, the traditional compensation mode that only six-rod parallel actuators are used for heave compensation, and the compensation range is only limited to the capacity of six-rod parallel connection is changed, and the compensation range of the system for heave is improved.

The invention belongs to the field of offshore boarding operation, and relates to a gangway ladder with a wave compensation function and an abutting control method thereof, the gangway ladder comprises a fixed gangway ladder, a gangway ladder telescopic control mechanism, a movable gangway ladder, a six-degree-of-freedom compensation platform, a gangway ladder rotation control mechanism, a gangway ladder rotation platform, a gangway ladder pitching control mechanism, a ladder end force sensor, an abutting device and a speed controller; and the speed controller sends the calculated driving instruction to the accommodation ladder telescopic control mechanism to switch the telescopic control mode of the movable accommodation ladder. The automatic compensation device is used in the automatic compensation stage after the accommodation ladder abuts against and makes contact with the accommodation ladder, so that the situation that contact points are possibly disconnected or disengaged due to the fact that the accommodation ladder is not stretched in time is avoided; when wave compensation is carried out, a speed control mode and a force control mode are adopted to cooperate with each other, the two control modes are switched under specific conditions to adapt to different conditions, and safety and stability are high.

The utility model belongs to the technical field of gangway ladders, and particularly discloses a step gangway ladder convenient to fold and unfold, which comprises a base, a support is arranged at the top of the base, a rotating shaft is rotatably connected to the inner surface of the support, a connecting frame is fixedly connected to one end, far away from the support, of the rotating shaft, and a gangway ladder frame is fixedly connected to the outer surface of the connecting frame. A step table is arranged on the inner side of the gangway ladder frame, a fixing rod is fixedly connected to the inner side of the base, and a retracting and releasing mechanism is arranged on the base. According to the step gangway ladder convenient to fold and unfold, the gangway ladder can be converted into a folded state from a using state through the folding and unfolding mechanism, when the gangway ladder assembly is in a horizontal state, the form of the gangway ladder assembly is closer to a flat plate or a rectangle, compared with an inclined state, the storage space can be fully utilized, and in other words, in the horizontal state, the shape of the gangway ladder assembly is more regular; and a protruding part or a gap does not appear, so that the accommodation ladder frame can fully utilize the storage space, and the waste of the space is reduced.

A telescopic gangway, comprising a telescopable first and second gangway part, such as a telescoping boom and main boom. The first gangway part has a first walkboard, such as a first grating, and the second gangway part has a second walkboard, such as a second grating, that partially overlaps the first walkboard. The gangway further comprises an angled step unit providing a transition from the first walkboard to the second walkboard, such that the first walkboard, the second walkboard and the angled step unit form an assembled walkboard path. Here, the angled step unit has a first coupling unit, such as a comb plate, that is coupled to the first walkboard for allowing a movement in the longitudinal direction. The angled step unit has also a translating coupling unit that is coupled to the second walkboard, preferably for allowing a movement in a direction transverse to the longitudinal direction.

The marine embarkation gangway ladder comprises a control platform, a telescopic ladder assembly, a multi-angle compensation mechanism and a hoop, the telescopic ladder assembly comprises a fixed section and an extension section which are in telescopic connection with each other, the control platform comprises a rotation compensation mechanism and a pitching compensation mechanism, and the control platform is movably connected with the fixed section of the telescopic ladder assembly; the telescopic ladder assembly can horizontally rotate and pitch on the basis of the control platform, and the extension section of the telescopic ladder assembly is connected with the hoop through the multi-angle compensation mechanism; the multi-angle compensation mechanism comprises a connector assembly, the connector assembly comprises a hinge rod and a first spring set, the two ends of the hinge rod are directly or indirectly connected with the extension section of the telescopic ladder assembly and the hoop respectively, one end of the hinge rod is horizontally hinged, and the other end of the hinge rod is vertically hinged. The first spring sets are symmetrically and coaxially arranged on the periphery of the hinge rod so as to elastically adjust rotation of the hinge rod. The compensation performance of the gangway ladder is optimized, and the energy efficiency, stability and simplicity of the whole system are improved.

The present invention relates to the technical field of offshore transfer operation equipment, and discloses a wave vertical motion compensation mechanism for offshore platform personnel to board a gangway, comprising a ship body, a first platform and a second platform are respectively arranged on one side of the ship body, a telescopic gangway is connected between the first platform and the second platform, a wave compensation boarding and disembarking gangway is hinged on one side of the second platform through a hinge shaft, and symmetrically arranged brackets are fixed on the lower surface of the second platform. The wave vertical motion compensation mechanism for offshore platform personnel to board the gangway can monitor the distance change in real time and quickly transmit the information to the control system, so that the telescopic oil cylinder is adjusted in time to maintain a safe distance between the wave compensation boarding and disembarking gangway and the transport boat, which can significantly reduce the risk of personnel or cargo falling due to distance change during the boarding and disembarking process, and avoid serious casualties.

The deep and far sea leisure fishery platform comprises a platform body, a superstructure is arranged on the platform body, anchor gears are arranged at the four corners of the platform body respectively, the anchor gears are connected with anchoring foundations through anchor chains, and the anchoring foundations are arranged on the seabed; a gangway ladder and a cantilever telescopic crane are arranged on the platform body, harbor basins are arranged at the head and the tail of the platform body respectively, and a leisure fishing boat functional cabin is arranged on the platform body. A slideway winch for providing power is arranged on the leisure fishing boat functional cabin, an in-cabin ramp is arranged on the leisure fishing boat functional cabin, a bracket with rollers is arranged on the in-cabin ramp, a prow mooring bollard is arranged on the bracket with the rollers, and the prow mooring bollard is connected with the slideway winch through a traction mooring rope; a tourist wharf is additionally arranged in the harbor basin outside the leisure fishing boat function cabin, a middle longitudinal sliding way is arranged in the middle of the leisure fishing boat function cabin, a tray type four-way shuttle vehicle is further arranged in the leisure fishing boat function cabin, and work is stable and reliable.

The utility model relates to the technical field of safety protection devices, and discloses a movable gangway ladder safety protection device which comprises a gangway ladder body and a guide rod fixedly installed on the gangway ladder body, and a right-angle guide plate is arranged on the guide rod in a sliding mode. A grip is fixedly installed on the right-angle guide plate, an installation block is fixedly installed on the right-angle guide plate, and the installation block is rotationally connected with a brake handle through a rotating shaft. And a limiting mechanism which is pulled by the brake handle and rubs with the guide rod is arranged in the right-angle guide plate. According to the safety protection device for the movable gangway ladder, the limiting mechanism is arranged, so that when the movable gangway ladder moves continuously, the movable gangway ladder can make contact with the gangway ladder body easily, and the stability in the moving process is improved.

The invention relates to a gangway system (1) for an offshore service vessel (N) adapted to transfer persons between said service vessel and an offshore structure (S) under sea wave motion conditions. The gangway system (1) comprises a telescopic corridor (7) having an upstream portion (71) and a downstream portion (72), the downstream portion (72) being translationally movable relative to the upstream portion (71). The gangway ladder system (1) further comprises means for actuating the gangway ladder (5), in particular a yaw actuation means (11), a pitch actuation means (12) and a translation actuation means (13). The handling means (10) cooperate with the control means (15) in order to stabilize, preferably rest, the downstream end (722) of the gangway ladder (5) on the offshore structure (S).

The invention relates to the technical field of gangway ladder maintenance and management, in particular to a gangway ladder maintenance and management system based on cloud data. The system comprises a judgment alarm unit, a calculation comparison unit and a maintenance scheme unit. The maintenance scheme unit formulates a gangway ladder maintenance scheme according to the obtained historical maintenance gangway ladder circuit poor connection scheme data and the obtained historical maintenance gangway ladder circuit short circuit fault scheme data, and carries out maintenance according to the formulated gangway ladder maintenance scheme data. According to the method, common poor connection and short-circuit fault problems can be identified, a corresponding preventive maintenance scheme is formulated, the problems are effectively prevented from occurring again, meanwhile, the poor connection and short-circuit fault problems of the gangway ladder circuit can be found and solved in time by implementing the maintenance scheme, further deterioration of the problems or the faults is avoided, and the service life of the gangway ladder circuit is prolonged. Normal operation of the gangway ladder circuit is ensured, and stability and reliability of the gangway ladder circuit are improved.

The invention belongs to the technical field of ships, and discloses a portable gangway ladder transfer platform. The transfer platform comprises an extending platform, a first detachable connecting structure and a second detachable connecting structure, the extending platform is arranged on a gangway ladder boarding opening in a ship, the gangway ladder boarding opening is formed in a ship body outer plate of the ship, and the projection of one part of the extending platform on the horizontal plane is exposed out of an extending structural platform of the ship; the first detachable connecting structure is used for detachably connecting the part extending out of the platform with a portable gangway ladder of a ship; and the second detachable connecting structure is used for detachably connecting the other part extending out of the platform with a hull deck of the ship. Through the arrangement of the portable gangway ladder transfer platform, the shielding obstacle of the overhanging structural platform to hoisting deployment is eliminated. In addition, through the second detachable connecting structure, the disassembly and assembly efficiency of the extending platform is improved, and then a safe, efficient and convenient-to-use boarding / leaving accommodation ladder channel is provided for passengers and staff on the ship.

According to the combined gangway ladder, firstly, the angle of a pedal can be adjusted according to the inclination angle of a gangway ladder frame, so that the pedal is horizontally arranged to the greatest extent, and the safety of getting on and off the gangway ladder is improved; besides, the first rotating shaft can be driven to rotate through the first power adjusting device, so that the end faces of all the pedals are located on the same plane, and an object (such as a bicycle) with wheels can conveniently move on the pedals; meanwhile, the pedal can be stored, and the overall size is reduced; through the arrangement of the strip-shaped handle, the sailors can conveniently hold the accommodation ladder to go up and down, and the safety of the accommodation ladder in use is improved; besides, the height distance between the strip-shaped handle and the gangway ladder frame can be adjusted through the adjustable connecting assembly, so that the position of the strip-shaped handle can be adjusted according to the actual use condition, and the gangway ladder can be conveniently used by sailors.

The present application relates to the technical field of ship and marine structure, and discloses a kind of boarding gangway energy compensation control system, boarding gangway includes pedestal, bridge and the gangway oil cylinder for driving bridge rotation, the system includes: hydraulic pump station, first reversing valve, energy storage component, second reversing valve, third reversing valve, the piston rod side and the piston rod side of oil cylinder are connected with hydraulic pump station and energy storage component respectively, hydraulic pump station controls hydraulic flow direction by first reversing valve, realizes the lifting and lowering of bridge, energy storage component stores gravitational potential energy when bridge is lowered by second reversing valve and third reversing valve, and releases high-pressure oil when bridge is lifted to carry out energy compensation, to reduce the output demand of hydraulic pump station, can reduce the consumption of electric energy, improve energy utilization efficiency.

The invention relates to the field of ships, and discloses a gangway ladder system and a ship comprising the same, a ship body of the ship is provided with an embarkation deck, the gangway ladder system comprises a gangway ladder and a first power device, a first switching part arranged at the upper end of a first ladder section of the gangway ladder is rotationally arranged relative to the embarkation deck, and the first power device is arranged below the embarkation deck; a first moving piece is not parallel to a first ladder section to extend and is movably arranged in the extending direction of the first moving piece, and the end, facing the first ladder section, of the first moving piece and the first ladder section are rotationally connected to the lower portion of a first switching part, so that the first moving piece moves towards the first ladder section to push the first ladder section to rotate outwards around the first switching part to be in a boarding state; the first moving part moves away from the first ladder section to pull the first ladder section to rotate inwards around the first switching part to the storage state, the situation that the accommodation ladder occupies the space on the embarkation deck when not used is avoided, the accommodation ladder is automatically driven to rotate outwards or inwards through the first moving part, and use is convenient.

To provide a multi-purpose vessel that combines cost efficiency and maneuverability for the construction and maintenance of floating offshore wind power generation facilities. [Solution] The multi-purpose vessel can be switched between a survey mode with a scaffold attached to the deck, an anchor handling mode in which the anchor of an offshore wind power generation facility can be placed on the deck and the chain of the offshore wind power generation facility can be stored in the storage space below the deck and the anchor can be installed on the seabed and the chain can be extended, and a maintenance mode in which a gangway is attached to the deck.

The present invention discloses a modular boarding interface device for ship cabins, which relates to the technical field of ship boarding. It includes a shore plate, and a boarding interface assembly is installed on the upper surface of the shore plate for precisely adjusting the position of the boarding ladder of the boarding platform. The upper surface of the right end of the boarding interface assembly abuts against a gangway ladder. First, by controlling the forward and reverse rotation of the first motor, the longitudinal adjustment rod can be driven to rotate forward and reverse. When the longitudinal adjustment rod rotates forward and reverse, the upper follower column and the boarding platform can be driven to move back and forth. By controlling the back-and-forth movement of the boarding platform, the preliminary alignment with the gangway ladder can be effectively completed. Then, by controlling the forward and reverse rotation of the second motor, the upper follower column and the boarding platform can be driven to move left and right. By controlling the left-and-right movement of the boarding platform, the secondary alignment with the gangway ladder can be quickly completed. Through the two alignment adjustments, the adjustment of the docking position between the interface device and the gangway ladder can be quickly completed, greatly reducing the labor intensity of users.

The utility model relates to a compensation type offshore stable side bridge which comprises a base, an orientation rotary table, a rotary driver, a lower orientation driving rotary table bearing, a swing U-shaped frame, a lifting U-shaped frame and a swing heaving driver. The first end of the azimuth turntable is connected with the base through a lower azimuth driving turntable bearing to form a first rotating pair; the second end of the orientation rotary table is in sliding connection with the first end of the swing U-shaped frame to form a second rotating pair, and a rotary driver is arranged in the middle of the second end of the orientation rotary table. The ship swing compensation is realized through linkage of rotation of the azimuth turntable, swing lifting of the swing U-shaped frame, the lifting U-shaped frame and the door-shaped frame, pitching of the azimuth turntable and yawing and telescopic motion of the telescopic yawing integrated box bridge, and the ship swing compensation device has the characteristics of compact structure and large compensation range, and can have the functions of a ship crane and a pedestrian path; and meanwhile, offshore hoisting operation and offshore personnel transfer operation are realized.

The guardrail welding device for the ship gangway ladder comprises a storage structure, a welding structure and a manual welding structure are fixed to the storage structure, the manual welding structure is located on the right side of the welding structure, an energy-saving structure and a moving assembly are embedded in the storage structure, the moving assembly is located on the lower side of the energy-saving structure, and a drawing assembly is fixed to the rear side of the storage structure. The movable storage assembly comprises a limiting plate, a motor box is fixed to the limiting plate, a motor in the motor box drives a first gear to rotate and drives a first baffle on a first rack to slide in a sliding groove, a first sealing cover is rotationally connected to the first baffle, the energy-saving structure comprises a third storage box, and a solar assembly is fixed to the third storage box. According to the guardrail welding device for the ship gangway ladder, the whole device is moved, a mechanical arm is rotated according to needs to conduct automatic welding or welding is conducted through a manual welding gun, harmful gas generated during welding is treated, and solar energy is converted into electric energy through an energy-saving structure when the guardrail welding device does not work.

The utility model relates to the technical field of gangway ladders, and discloses an adjustable gangway ladder assembly which comprises a gangway ladder body. The two sides of the accommodation ladder body are each provided with a handrail frame rod, the two handrail frame rods are each provided with a plurality of assembly parts, the positions of the assembly parts on the handrail frame rods are adjustable, the assembly parts are each provided with a rotary passing limiting part, and the height of the rotary passing limiting parts on the assembly parts is adjustable. The utility model provides an adjustable gangway ladder assembly which solves the problem that people walk on a gangway ladder and are prone to being concentrated in one area, and the falling risk is caused.

The invention provides a boarding gangway ladder for a ro-ro passenger ship and a manufacturing method of the boarding gangway ladder, and belongs to the field of boarding gangway ladders, the boarding gangway ladder for the ro-ro passenger ship comprises a cross gantry of a gantry crane, the cross gantry comprises a supporting platform, four supporting legs are evenly arranged on the outer side of the supporting platform, and a walking mechanism is arranged at the lower end of each supporting leg; a lap joint platform is mounted at the top of the supporting platform, and at least one first-stage gangway ladder is arranged on each of the two sides of the lap joint platform; the lower ends of all the first-stage gangway ladders located on the same side are jointly connected with a first-stage buffering platform, and the two first-stage buffering platforms are fixedly installed on the outer sides of the corresponding supporting legs. The two first-stage buffer platforms are each downwards connected with a second-stage gangway ladder, the lower ends of the second-stage gangway ladders are jointly connected with a second-stage buffer platform, and the second-stage buffer platform is downwards connected with a main channel gangway ladder and an auxiliary channel gangway ladder. The method has the beneficial effects that the boarding safety and convenience can be improved, and effective recycling of waste resources can be achieved.