Boarding device for operation and maintenance ship

Abstract

The boarding device for the operation and maintenance ship comprises a base, universal wheel assemblies are installed on the base in a matched mode, the base is installed on the top of a deck in a matched mode through the universal wheel assemblies, a lifting platform is installed on the top of the base in a matched mode, an installation frame is installed on the top of the lifting platform in a matched mode, and a bridge is installed on the top of the installation frame in a matched mode. A plurality of gear teeth are arranged on the top end face of the bridge, the bridge is meshed with a gear through the gear teeth, the gear is connected with the output end of a driving motor, a plurality of hydraulic cylinders are fixed to the bottom of the bridge, the output end of each hydraulic cylinder is hinged to one end of a connecting rod, and the other end of each connecting rod is hinged to the step ladder. Through the arrangement of the base and the lifting platform, the adjusting capacity is good, the ship berthing device can adapt to various sea conditions, the berthing requirements of various ships are met, the docking efficiency is high, the connecting stability is good, safer and more efficient working conditions are provided for operation and maintenance personnel in the ocean engineering field, and further development of the ocean engineering technology is promoted.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering, and in particular to a boarding device for an operation and maintenance ship. Background Art

[0002] In recent years, with the continuous progress of marine engineering technology, various floating structures have been widely used in the ocean. Floating structures include offshore breakwaters and floating wind turbines. Offshore breakwaters have gradually evolved into a diversified place that integrates leisure and entertainment with practical functions, while breakthroughs in floating wind turbine technology have enabled the effective development of wind resources in deeper and farther waters, further broadening the scope of utilization of offshore resources.

[0003] However, with the popularity of floating structures, the difficulty of their repair and maintenance work has increased, especially in terms of how operators can quickly and safely board these floating structures. The limitations of traditional boarding ladders have become increasingly prominent and face a series of challenges. The main problems faced by traditional boarding ladders in practical applications are as follows:

[0004] (1) Limited adjustment capability. The adjustment capability of traditional boarding ladders is extremely limited, making it difficult to adapt to the frequent berthing needs of ships of different sizes. When a ship undergoes horizontal displacement due to the action of waves, traditional boarding ladders are often unable to be effectively adjusted, resulting in docking difficulties. This not only affects work efficiency, but may also cause safety hazards due to improper docking.

[0005] (2) Low docking efficiency. When the ship type or environmental conditions change, the traditional boarding ladder is often unable to achieve effective docking with the ship due to improper fixed angle or length. The staff has to frequently disassemble and reassemble the boarding ladder to adapt to different docking requirements. This process is time-consuming and labor-intensive, resulting in a significant reduction in work efficiency.

[0006] (3) Poor connection stability. The two ends of the traditional boarding ladder are connected to the ship and the boarding platform in an overlapping manner. This rigid contact structure exhibits extremely poor stability when the ship rises and falls or moves horizontally. In severe sea conditions, the ship shakes violently, and it is difficult for personnel to land or board the ship safely and effectively using the traditional boarding ladder, which brings great inconvenience to offshore operations and may also endanger the lives of operation and maintenance personnel. Summary of the invention

[0007] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a rationally structured boarding device for operation and maintenance ships. By setting a base and a lifting platform, the device has good adjustment ability, can adapt to various sea conditions, meet the berthing requirements of various ships, has high docking efficiency and good connection stability, and provides safer and more efficient working conditions for operation and maintenance personnel in the marine engineering field, thereby promoting the further development of marine engineering technology.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A boarding device for a maintenance ship, comprising a base, a universal wheel assembly is mounted on the base, the base is mounted on the top of the deck through the universal wheel assembly, a lifting platform is mounted on the top of the base, a mounting frame is mounted on the top of the lifting platform, a bridge is mounted on the top of the mounting frame, a top end surface of the bridge is provided with a plurality of gear teeth, the bridge is meshed with gears through the gear teeth, the gears are connected to the output end of a driving motor, the driving motor drives the gears to rotate, thereby driving the bridge to perform a linear motion of extending or retracting, a plurality of hydraulic cylinders are fixed to the bottom of the bridge, the output end of a single hydraulic cylinder is hinged to one end of a connecting rod, and the other end of the single connecting rod is hinged to a step ladder;

[0010] The base moves along the deck in a directional manner through the universal wheel assembly, thereby driving the bridge to move to the target position through the lifting platform. The lifting platform drives the bridge to move linearly in the vertical direction through the mounting frame, thereby adjusting the height of the bridge to the target height, and then landing or boarding the ship through the lowered steps.

[0011] As a further improvement of the above technical solution:

[0012] A boarding ladder is fixed on one side of the bridge, and the boarding ladder connects the uppermost layer of the step ladder and the top end surface of the bridge.

[0013] The structure of the base is as follows: it includes a base body, a center hole is provided in the middle of the base body, a turntable is rotatably installed in the center hole, the turntable is connected to the output end of the first motor, the turntable is fixed to the lifting platform, the first motor drives the turntable to rotate, thereby driving the bridge to rotate through the lifting platform;

[0014] A travel drive assembly is installed at the bottom of the seat body, and the seat body is driven to move on the deck by the travel drive assembly.

[0015] The travel drive assembly comprises a first sphere, and four rollers are evenly spaced along the circumference of the outer wall of the first sphere, and the outer wall of each roller is in contact with the outer wall of the first sphere;

[0016] It also includes a plurality of spherical shells fixed on the base body, each spherical shell has a downward opening, a second sphere is fitted in the opening, and the second sphere is arranged tangentially to the first sphere;

[0017] A single roller is installed on the seat body through a bracket, and the single roller is fixed on the outer wall of the rotating rod of the bracket. The single rotating rod is connected to the output end of the second motor. The second motor drives the corresponding rotating rod to rotate, driving the corresponding roller to rotate, thereby driving the first sphere to rotate through friction, and then causing friction between the first sphere and the second sphere to drive the seat body to move.

[0018] A plurality of first hydraulic rods installed downwards are also fixed to the bottom of the seat body. When the first hydraulic rods are extended at the same time, the seat body is propped up, so that the first sphere is separated from the second sphere.

[0019] The structure of the lifting platform is as follows: it includes a top frame and a bottom frame spaced apart from top to bottom, a symmetrically arranged support frame assembly is installed between the top frame and the bottom frame, and a plurality of second hydraulic rods are installed between the top frame and the bottom frame. The second hydraulic rods extend or retract to drive the top frame to move linearly away from or close to the bottom frame.

[0020] The structure of the single-group support frame assembly is as follows: it includes a first support rod, a square through hole is provided in the middle of the end surface of the first support rod, a second support rod is installed in the square through hole, and the second support rod is hinged to the first support rod through a hinge shaft.

[0021] A plurality of third hydraulic rods are mounted on the bottom frame, and the output end of a single third hydraulic rod is hinged to the bridge.

[0022] An L-shaped slide rail assembly is installed on the deck, and the horizontal end surface of the L-shaped slide rail assembly is spaced from top to bottom with the top end surface of the deck.

[0023] The universal wheel assembly includes a plurality of first universal wheels installed upward, and a plurality of second universal wheels installed downward;

[0024] The single first universal wheel moves along the horizontal end surface of the L-shaped slide rail assembly, and the single second universal wheel moves along the top end surface of the deck.

[0025] The beneficial effects of the present invention are as follows:

[0026] The boarding device of the present invention is arranged on the deck of the operation and maintenance ship, and can adapt to various floating structures, so there is no need to install corresponding boarding devices on the floating structures, which reduces the consumption of manpower and material resources and facilitates maintenance.

[0027] The boarding device of the present invention can ensure the smooth movement of the boarding device on the deck by arranging a universal wheel assembly and an L-shaped slide rail, thereby ensuring the working reliability of the boarding device in severe sea conditions.

[0028] The boarding device of the present invention can realize flexible landing at any position of the floating structure by arranging a base and a lifting platform, and has high flexibility in use.

[0029] The boarding device of the present invention provides a hydraulic cylinder and a connecting rod, so that the contact between the step ladder and the deck, and between the step ladder and the floating structure is soft contact, which has good stability and improves the safety of personnel boarding or landing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention.

[0031] Figure 2 for Figure 1 main view.

[0032] Figure 3 It is a schematic diagram of the structure of the base in the present invention.

[0033] Figure 4 for Figure 3 Top view of the .

[0034] Figure 5 for Figure 4 Cross-sectional view of section AA.

[0035] Figure 6 It is a structural schematic diagram of the lifting platform in the present invention.

[0036] Figure 7 for Figure 6 Exploded diagram.

[0037] Figure 8 It is a schematic diagram of the present invention in working state.

[0038] Fig. 9 for Figure 8 A partial enlarged view of point A in the middle.

[0039] Among them: 1. Base; 2. Lifting platform; 3. First universal wheel; 4. Second universal wheel; 5. Bridge; 6. Step ladder; 7. Boarding ladder; 8. Drive motor; 9. Gear; 10. Mounting frame; 11. Hydraulic cylinder; 12. Connecting rod; 13. Deck; 14. L-shaped slide rail assembly;

[0040] 101, first sphere; 102, second sphere; 103, seat; 104, roller; 105, spherical shell; 106, bracket; 107, first motor; 108, turntable; 109, second motor; 110, first hydraulic rod;

[0041] 201, bottom frame; 202, top frame; 203, support frame assembly; 204, second hydraulic rod; 205, third hydraulic rod;

[0042] 2031, first support rod; 2032, second support rod; 2033, square through hole; 2034, hinge shaft. DETAILED DESCRIPTION

[0043] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0044] The structure and function of the present invention are as follows:

[0045] like Figure 1-Figure 9 As shown, a boarding device for maintenance ship includes a base 1, a universal wheel assembly is installed on the base 1, the base 1 is installed on the top of the deck 13 through the universal wheel assembly, a lifting platform 2 is installed on the top of the base 1, a mounting frame 10 is installed on the top of the lifting platform 2, a bridge 5 is installed on the top of the mounting frame 10, a plurality of gear teeth are arranged on the top end surface of the bridge 5, the bridge 5 is meshed with a gear 9 through the gear teeth, the gear 9 is connected to the output end of the driving motor 8, the driving motor 8 drives the gear 9 to rotate, thereby driving the bridge 5 to rotate. The bridge 5 makes a linear motion of extending or retracting, and several hydraulic cylinders 11 are fixed to the bottom of the bridge 5. The output end of a single hydraulic cylinder 11 is hinged to one end of a connecting rod 12, and the other end of a single connecting rod 12 is hinged to the ladder 6; the base 1 moves directionally along the deck 13 through the universal wheel assembly, thereby driving the bridge 5 to move to the target position through the lifting platform 2, and the lifting platform 2 drives the bridge 5 to make a linear motion in the vertical direction through the mounting frame 10, thereby adjusting the height of the bridge 5 to the target height, and then landing or boarding the ship through the lowered ladder 6.

[0046] The boarding device of the present invention is applied to the maintenance ship, and is specifically arranged on the top of the deck 13 of the maintenance ship. Through the boarding device of the present invention, personnel can be transferred from the maintenance ship to the floating structure, and personnel can also be transferred from the floating structure to the maintenance ship. Figure 8 As shown, an L-shaped slide rail assembly 14 is installed on the deck 13, and the horizontal end surface of the L-shaped slide rail assembly 14 is spaced from top to bottom with the top end surface of the deck 13.

[0047] The boarding device includes a base 1, a lifting platform 2, a universal wheel assembly, a bridge 5, a step ladder 6, a drive motor 8, a gear 9, a mounting frame 10, a hydraulic cylinder 11, and a connecting rod 12; wherein,

[0048] The base 1 provides stable support for the boarding device and drives the boarding device to move to a suitable position as a whole to facilitate landing or boarding; the base 1 can drive the boarding device to move in a straight line along a set path, and the base 1 can also drive the bridge 5 to rotate through the lifting platform 2. In this embodiment, the movement path of the boarding device is correspondingly set through the L-shaped slide rail assembly 14; by setting the base 1, the flexibility and stability of the boarding device can be improved, ensuring that landing or boarding can be carried out safely and accurately under various sea conditions.

[0049] like Figure 3-Figure 5As shown, the structure of the base 1 is as follows: it includes a base 103, a center hole is provided in the middle of the base 103, a turntable 108 is rotatably installed in the center hole, the turntable 108 is connected to the output end of the first motor 107, the turntable 108 is fixed to the lifting platform 2, the first motor 107 drives the turntable 108 to rotate, thereby driving the bridge 5 to rotate through the lifting platform 2; a travel drive assembly is installed at the bottom of the base 103, and the base 103 is driven to move on the deck 13 through the travel drive assembly. In order to improve the structural stability, the output end of the first motor 107 is connected to the turntable 108 through a slewing bearing, so as to effectively ensure the stability of the rotation of the turntable 108. By setting the turntable 108, the step ladder 6 can be lowered toward the floating structure.

[0050] The walking drive assembly includes a first sphere 101, on the outer wall of which four rollers 104 are evenly spaced along the circumference, and the outer wall of each roller 104 contacts the outer wall of the first sphere 101; it also includes several spherical shells 105 fixed on the base 103, a downward opening is provided on a single spherical shell 105, a second sphere 102 is installed in the opening, and the second sphere 102 is arranged tangentially to the first sphere 101; a single roller 104 is installed on the base 103 through a bracket 106, and the single roller 104 is fixed on the outer wall of the rotating rod of the bracket 106, and the single rotating rod is connected to the output end of the second motor 109, and the second motor 109 drives the corresponding rotating rod to rotate, driving the corresponding roller 104 to rotate, thereby driving the first sphere 101 to rotate through friction, and then causing friction between the first sphere 101 and the second sphere 102, driving the base 103 to move. In the present invention, by setting the first sphere 101 and the second sphere 102, the friction between the spheres can provide the seat 103 with the power to move, and the contact between the spheres can compensate for the waves, so that the seat 103 can always remain stable; by setting four first motors and four rollers 104, and the interval between two adjacent rollers 104 is 90 degrees, that is, two rollers 104 are distributed at an interval of 180 degrees along the X radial direction of the first sphere 101, and the other two rollers 104 are distributed at an interval along the Y radial direction of the first sphere 101, and the X radial direction and the Y radial direction of the first sphere 101 are perpendicular to each other. straight; when the first seat body 103 is required to make a linear motion along the X radial direction of the first sphere 101, the two rollers 104 spaced apart along the X radial direction rotate, and the rotation directions are ensured to be the same, so that the first sphere 101 can be stably driven to rotate in a directional manner, so that the first sphere 101 rolls on the deck 13; at the same time, a moving force is generated between the first sphere 101 and the second sphere 102 tangent thereto due to friction, thereby driving the seat body 103 to make a linear motion along the rolling direction of the first sphere 101, so as to realize the flexible movement of the boarding device as a whole on the deck 13, and to ensure that the movement process is smooth and reliable.

[0051] In addition, in this embodiment, the structure of a single bracket 106 includes two support rods symmetrically arranged at intervals, and the two support rods are connected by a rotating rod, so that the corresponding bracket 106 is The rotating rod and the two supporting rods are respectively rotatably mounted, and the single second motor 109 is mounted in cooperation with the corresponding rotating rod through a first transmission assembly (not shown in the drawings). The first transmission assembly can adopt a chain transmission mode, a belt transmission mode or a gear transmission mode. Specifically,

[0052] When the first transmission component adopts a chain transmission method, the first transmission component includes a first driving sprocket directly connected to the output end of the corresponding second motor 109, and a first driven sprocket fixed on the outer wall of the rotating rod, and a first chain is installed between the first driving sprocket and the first driven sprocket. The corresponding second motor 109 drives the first driving sprocket to rotate, and drives the first driven sprocket to rotate through the first chain, thereby driving the corresponding rotating rod to rotate, and then driving the corresponding roller 104 to rotate.

[0053] Several downwardly mounted first hydraulic rods 110 are fixed to the bottom of the seat body 103. When the first hydraulic rods 110 are extended at the same time, the seat body 103 is propped up, so that the first sphere 101 is separated from the second sphere 102. After the boarding device moves into position, it stops moving. At this time, the first hydraulic rod 110 is extended to provide stable support for the boarding device to prevent the boarding device from moving; the output end of a single first hydraulic rod 110 is connected to a support plate, which can increase the contact area with the deck 13 and improve the support stability.

[0054] The universal wheel assembly is mounted on the seat 103, and includes a plurality of first universal wheels 3 mounted upward, and a plurality of second universal wheels 4 mounted downward; a single first universal wheel 3 moves along the horizontal end surface of the L-shaped slide rail assembly 14, and a single second universal wheel 4 moves along the top end surface of the deck 13. The universal wheel assembly facilitates the movement of the boarding device on the deck 13; in addition, the horizontal end surface of the L-shaped slide rail assembly 14 has a limiting effect on the first universal wheel 3, which can clamp the first universal wheel 3 when the maintenance ship shakes, thereby effectively preventing the boarding device from capsizing, and can provide sufficient support for the boarding device in waters with a certain range of wave heights, thereby enhancing the stability and safety of the boarding device in severe sea conditions.

[0055] A lifting platform 2 is fixed on the turntable 108. By setting the lifting platform 2, the height of the bridge 5 can be adjusted according to actual needs, so that the boarding device can adapt to floating structures of different heights. Figure 6-Figure 7As shown, the structure of the lifting platform 2 is: it includes a top frame 202 and a bottom frame 201 spaced apart from top to bottom, a symmetrically arranged support frame assembly 203 is installed between the top frame 202 and the bottom frame 201, and a plurality of second hydraulic rods 204 are installed between the top frame 202 and the bottom frame 201. The second hydraulic rods 204 extend or retract, thereby driving the top frame 202 to move linearly away from or close to the bottom frame 201.

[0056] The structure of the single support frame assembly 203 is as follows: it includes a first support rod 2031, a square through hole 2033 is provided in the middle of the end surface of the first support rod 2031, a second support rod 2032 is installed in the square through hole 2033, and the second support rod 2032 is hinged to the first support rod 2031 through a hinge shaft 2034. The first support rod 2031 and the second support rod 2032 are arranged crosswise in an X shape, which further improves the load-bearing capacity of the lifting platform 2 and can ensure the stability and smoothness of the lifting platform 2 supporting the bridge 5 during the lifting process.

[0057] A plurality of third hydraulic rods 205 are mounted on the bottom frame 201, and the output end of a single third hydraulic rod 205 is hinged to the bridge 5. The third hydraulic rod 205 is used to support the bridge 5 when the bridge 5 is extended relative to the mounting frame 10, to ensure the balance of the bridge 5, and to further improve the structural stability of the boarding device.

[0058] A mounting frame 10 is fixed on the top of the lifting platform 2, and a bridge 5 is rotatably mounted on the mounting frame 10. Under the action of the driving motor 8, the bridge 5 can make a linear motion of extending or retracting relative to the mounting frame 10; in the present invention, the driving motor 8 fixed on the mounting frame 10 is arranged below the bridge 5, and the driving motor 8 is connected to the gear 9 through a second transmission component (not shown in the drawings). The second transmission component can adopt a chain transmission mode, a belt transmission mode or a gear transmission mode. Specifically, when the second transmission component adopts a chain transmission mode,

[0059] It includes a second driving sprocket directly connected to the output end of the driving motor 8, and a second driven sprocket installed through a connecting shaft and a gear 9, the second driven sprocket and the gear 9 are respectively fixed to the two ends of the connecting shaft, and the connecting shaft is supported by an L-shaped support frame, one end of the support frame is fixed to the mounting frame 10, and the other end is rotatably matched with the connecting shaft, and the second driving sprocket and the second driven sprocket are directly matched to install a second chain;

[0060] The driving motor 8 drives the second driven sprocket to rotate, and drives the second driven chain to rotate through the second chain, thereby driving the connecting shaft to rotate through the second driven chain, and further driving the gear 9 to rotate through the connecting shaft.

[0061] By setting up a driving motor 8 and a gear 9, the bridge 5 can be extended or retracted relative to the mounting frame 10, so that the boarding device can adapt to floating structures at different distances; at the same time, a lifting platform is used to adjust the height of the bridge 5, so that the boarding device can quickly match the contact position when facing various floating structures, thereby improving the flexibility and convenience of the landing or boarding process.

[0062] A step ladder 6 is installed on the bridge 5 through a hydraulic cylinder 11 and a connecting rod 12. In the present invention, the step ladder 6 is a telescopic step ladder, which can provide a safe and convenient landing or boarding passage for personnel. By setting the connecting rod 12, the connecting rod 12 is hinged with the step ladder 6, so that the step ladder 6 can move with the ups and downs of the maintenance ship and maintain stable contact with the floating structure.

[0063] A boarding ladder 7 is fixed on one side of the bridge 5 , and the boarding ladder 7 connects the uppermost layer of the step ladder 6 with the top end surface of the bridge 5 .

[0064] The present invention does not need to separately install boarding devices on various floating structures (such as offshore breakwaters, floating wind turbines, etc.), but directly sets them on the deck 13 of the operation and maintenance ship, which greatly reduces the consumption of manpower and material resources, and also avoids the tedious process of repeated installation and disassembly on different floating structures.

[0065] In severe sea conditions, especially when there are strong winds and waves on the side of the maintenance ship, the maintenance ship can head the waves with its bow, and the operator can control the boarding device to move smoothly along the L-shaped track 14 to select a safe landing or boarding position; when the position is determined, the first hydraulic rod 110 extends and presses down the deck to fix the boarding device, ensuring that the boarding device can remain stable even in strong winds and huge waves.

[0066] No matter whether the operator is at the front, middle or end of the floating structure, and no matter how the surface terrain of the floating structure is undulating or how the angle changes, the operator can control the boarding device to move to a position on the deck 13 suitable for landing or boarding, so that the landing or boarding process is not limited by the type of floating structure, greatly improving work efficiency.

[0067] The boarding device is installed on the deck 13 of the operation and maintenance ship to facilitate daily maintenance and upkeep; at the same time, the retractable bridge 5 and the ladder 6 can be retracted and placed on the deck 13 when not in operation, further extending the service life of the boarding device.

[0068] By hingedly connecting the ladder 6 to the bridge 5, a soft contact method is adopted when contacting with other ship decks or various floating structures, thereby enhancing the connection stability; in addition, even when the ship is shaken violently, the first hydraulic rod 110 and the second hydraulic rod 204 can ensure stable support for the bridge 5, thereby preventing the boarding device from moving.

[0069] The working process of the present invention is as follows:

[0070] The boarding device, when in use, includes the landing process and the boarding process;

[0071] The login process includes the following steps:

[0072] The maintenance vessel approaches the floating structure and starts the landing procedure. First, the ladder 6 is unfolded and lowered until it contacts the deck 13. The personnel board the bridge 5 by sequentially passing through the ladder 6 and the boarding ladder 7. Then the ladder 6 is folded and recovered.

[0073] The first hydraulic rod 110 is retracted, and the second motor 109 is started at the same time. The second motor 109 drives the corresponding roller 104 to rotate, thereby driving the first ball 101 to roll along the arrangement path of the L-shaped slide rail 14, thereby driving the boarding device to move to a suitable position, and then the first hydraulic rod 110 is extended to fix the boarding device at the position;

[0074] The driving motor 8 is started, and the driving gear 9 rotates, so that the bridge 5 extends a certain length relative to the mounting frame 10, so that the step ladder 6 can contact the surface of the floating structure after being lowered;

[0075] When the bridge 5 is extended, the third hydraulic rod 205 is extended synchronously, thereby stably supporting the bridge 5;

[0076] At the same time, according to the height difference between the maintenance ship and the floating structure, the height of the boarding device is adjusted by controlling the second hydraulic rod 204 to extend or retract, so that the step ladder 6 can be placed on the surface of the floating structure after being lowered;

[0077] The first motor 107 is started to drive the turntable 108 to rotate, so that one end of the bridge 5 with the ladder 6 installed is facing the floating structure, so that the boarding device is adjusted into place, and then the ladder 6 is lowered to contact the surface of the floating structure, and personnel land on the floating structure in turn through the boarding ladder 7 and the ladder 6.

[0078] The boarding process includes the following steps:

[0079] The maintenance vessel approaches the floating structure and starts the boarding procedure. First, the boarding device is driven to move to the target position through the base 1 to facilitate the subsequent lowering of the step ladder 6. After moving to the target position, the first hydraulic rod 110 is extended to fix the boarding device at the position;

[0080] The height of the boarding device is adjusted by the lifting platform 2 to ensure that the subsequently lowered step ladder 6 can contact the floating structure;

[0081] After being adjusted in place, the driving motor 8 drives the bridge 5 to extend through the gear 9, and then the step ladder 6 is lowered until it contacts the floating structure. The personnel board the bridge 5 by passing through the step ladder 6 and the boarding ladder 7 in sequence, and then the step ladder 6 is folded and recovered;

[0082] The driving motor 8 reverses and drives the bridge 5 to retract to its original position through the gear 9, and then the ladder 6 is lowered again until the ladder 6 contacts the deck 13. The personnel arrive at the deck 13 via the boarding ladder 7 and the ladder 6 in turn, thus completing boarding.

[0083] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A boarding device for an operation and maintenance ship, characterized in that: The invention comprises a base (1), a universal wheel assembly is mounted on the base (1), the base (1) is mounted on the top of a deck (13) through the universal wheel assembly, a lifting platform (2) is mounted on the top of the base (1), a mounting frame (10) is mounted on the top of the lifting platform (2), a bridge (5) is mounted on the top of the mounting frame (10), a plurality of gear teeth are arranged on the top end surface of the bridge (5), the bridge (5) is meshed with a gear (9) through the gear teeth, the gear (9) is connected to the output end of a driving motor (8), the driving motor (8) drives the gear (9) to rotate, thereby driving the bridge (5) to perform a linear motion of extending or retracting, a plurality of hydraulic cylinders (11) are fixed on the bottom of the bridge (5), the output end of a single hydraulic cylinder (11) is hinged to one end of a connecting rod (12), and the other end of a single connecting rod (12) is hinged to a step ladder (6); The base (1) moves in a directional manner along the deck (13) via a universal wheel assembly, thereby driving the bridge (5) to move to a target position via the lifting platform (2); the lifting platform (2) drives the bridge (5) to move linearly in a vertical direction via a mounting frame (10), thereby adjusting the height of the bridge (5) to a target height, and then landing or boarding the ship via a lowered step ladder (6).

2. A boarding device for an operation and maintenance ship as claimed in claim 1, characterized in that: A boarding ladder (7) is fixed on one side of the bridge (5), and the boarding ladder (7) connects the uppermost layer of the step ladder (6) and the top end surface of the bridge (5).

3. A boarding device for an operation and maintenance ship according to claim 1, characterized in that: The structure of the base (1) is as follows: it includes a base body (103), a central hole is provided in the middle of the base body (103), a turntable (108) is rotatably installed in the central hole, the turntable (108) is connected to the output end of the first motor (107), the turntable (108) is fixed to the lifting platform (2), and the first motor (107) drives the turntable (108) to rotate, thereby driving the bridge (5) to rotate through the lifting platform (2); A travel drive assembly is installed on the bottom of the seat body (103), and the seat body (103) is driven to move on the deck (13) by the travel drive assembly.

4. A boarding device for an operation and maintenance ship as claimed in claim 3, characterized in that: The travel drive assembly comprises a first sphere (101), the outer wall surface of the first sphere (101) being provided with four rollers (104) evenly spaced along the circumference, and the outer wall surface of each roller (104) being in contact with the outer wall surface of the first sphere (101); It also includes a plurality of spherical shells (105) fixed on the base body (103), each spherical shell (105) is provided with a downward opening, a second spherical body (102) is fitted in the opening, and the second spherical body (102) is arranged tangentially to the first spherical body (101); A single roller (104) is mounted on the base (103) through a bracket (106); the single roller (104) is fixed on the outer wall of the rotating rod of the bracket (106); the single rotating rod is connected to the output end of the second motor (109); the second motor (109) drives the corresponding rotating rod to rotate, thereby driving the corresponding roller (104) to rotate, thereby driving the first sphere (101) to rotate through friction, thereby causing the first sphere (101) and the second sphere (102) to generate friction, thereby driving the base (103) to move.

5. The boarding device for maintenance ship according to claim 3, characterized in that: A plurality of first hydraulic rods (110) installed downward are also fixed to the bottom of the seat body (103). When the first hydraulic rods (110) are extended at the same time, the seat body (103) is propped up, thereby separating the first sphere (101) from the second sphere (102).

6. The boarding device for a maintenance ship according to claim 1, characterized in that: The structure of the lifting platform (2) is as follows: it comprises a top frame (202) and a bottom frame (201) which are spaced apart from each other from top to bottom; a symmetrically arranged support frame assembly (203) is installed between the top frame (202) and the bottom frame (201); a plurality of second hydraulic rods (204) are also installed between the top frame (202) and the bottom frame (201); the second hydraulic rods (204) extend or retract, thereby driving the top frame (202) to move linearly away from or close to the bottom frame (201).

7. A boarding device for a maintenance ship as claimed in claim 6, characterized in that: The structure of the single-group support frame assembly (203) is as follows: it includes a first support rod (2031), a square through hole (2033) is provided in the middle of the end surface of the first support rod (2031), a second support rod (2032) is installed in the square through hole (2033), and the second support rod (2032) is hinged to the first support rod (2031) via a hinge shaft (2034).

8. The boarding device for a maintenance ship according to claim 6, characterized in that: A plurality of third hydraulic rods (205) are mounted on the bottom frame (201), and the output end of a single third hydraulic rod (205) is hinged to the bridge (5).

9. The boarding device for a maintenance ship according to claim 1, characterized in that: An L-shaped slide rail assembly (14) is mounted on the deck (13), and a horizontal end surface of the L-shaped slide rail assembly (14) is spaced from top to bottom with a top end surface of the deck (13).

10. A boarding device for a maintenance ship according to claim 9, characterized in that: The universal wheel assembly comprises a plurality of first universal wheels (3) installed upward, and a plurality of second universal wheels (4) installed downward; The single first universal wheel (3) moves along the horizontal end surface of the L-shaped slide rail assembly (14), and the single second universal wheel (4) moves along the top end surface of the deck (13).

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