Large mechanical gangway ladder for port

Abstract

The invention provides a port large-scale mechanized gangway ladder which comprises a tractor, a trailer assembly, a self-adaptive ladder, a lifting platform assembly, a rotary supporting seat and a telescopic ramp, the tractor is detachably connected with the front side of the trailer assembly, and the self-adaptive ladder is used for adjusting the inclination angle of a pedal according to the gradient of the gangway ladder. One side of the self-adaptive step is hinged to the trailer assembly, the other side of the self-adaptive step is hinged to the lifting platform assembly, the bottom of the lifting platform assembly is hinged to the trailer assembly, the side, away from the self-adaptive step, of the lifting platform assembly is slidably connected with a rotary supporting seat, and the top of the rotary supporting seat is hinged to one end of the telescopic ramp. The rotary supporting seat drives the telescopic ramp to rotate in all directions, the other end of the telescopic ramp is connected with a ship support, the accommodation ladder can be adjusted to ascend and descend according to tidal changes, the passing requirement of personnel is met, safety is high, meanwhile, cost is low, efficiency is high, and the wriggling problem of a large tide and a ship under stormy waves is solved. And the position of the gangway ladder can be quickly adjusted.

Description

Technical Field

[0001] This invention belongs to the field of marine gangway technology, and specifically relates to a large-scale mechanized gangway for ports. Background Technology

[0002] The height of a ship platform often changes due to the tides. At this time, the existing gangway angle is fixed and cannot be adjusted according to the change of the ship platform height, resulting in poor personnel passage and safety performance, and in severe cases, it may even endanger the lives of people disembarking.

[0003] Existing large marine gangways are generally of two types: those provided by the ship itself and those provided by the port. Both types of gangways require the use of cranes for installation, which involves a large number of installation personnel, long installation time, high cost, and low installation efficiency. They cannot meet the urgent need of personnel to disembark. In addition, when installing gangways, it is often necessary to drag the entire gangway to adjust it according to the ship's movement. However, the gangway itself is large and heavy, making it difficult to drag. Difficulties in dragging can easily create gaps between the gangway and the ship's platform, thus affecting the normal disembarkation of personnel.

[0004] Most existing gangways are single-section structures. When there are large tidal changes, the height of the ship platform increases accordingly, which makes the inclination slope of the gangway greater. This cannot meet the comfort requirements for people to disembark and poses a significant safety hazard. Summary of the Invention

[0005] To address the problems of the prior art, embodiments of the present invention provide a large-scale mechanized gangway for ports.

[0006] According to one aspect of the present invention, a large-scale mechanized gangway for ports is provided, comprising a tractor, a trailer assembly, adaptive steps, a lifting platform assembly, a swivel support, and a telescopic ramp. The tractor is detachably connected to the front side of the trailer assembly. The adaptive steps are used to adjust the tilt angle of the steps according to the slope of the gangway. One side of the adaptive steps is hinged to the trailer assembly, and the other side is hinged to the lifting platform assembly. The bottom of the lifting platform assembly is hinged to the trailer assembly. The swivel support is slidably connected to the side of the lifting platform assembly away from the adaptive steps. The top of the swivel support is hinged to one end of the telescopic ramp. The swivel support drives the telescopic ramp to rotate in all directions. The other end of the telescopic ramp is connected to a ship support.

[0007] Preferably, the trailer assembly includes a frame, front telescopic legs, and rear telescopic legs. The front telescopic legs and the rear telescopic legs are respectively fixedly installed on the front and rear sides of the frame, and the front telescopic legs and the rear telescopic legs are driven by a hydraulic system.

[0008] Preferably, the adaptive staircase includes a staircase support, handrails, rollers, and connecting rods. The handrails are installed on both sides of the staircase support, and multiple pedals are installed in the middle of the staircase support. The front sides of the multiple pedals are hinged to the staircase support, and the rear sides are hinged to corresponding hinge seats on the connecting rods. There are two connecting rods, which are arranged parallel to each other on both sides of the bottom of the staircase support. Multiple hinge seats are fixedly installed on the upper part of each connecting rod, and each hinge seat corresponds to a pedal. The lower ends of the connecting rods and the lower ends of the staircase support are rotatably mounted on the frame. The hinge point between the connecting rod and the frame is on the same horizontal line as the hinge point between the staircase support and the frame.

[0009] Preferably, the lifting platform assembly includes a lifting platform, a railing, an inner shear frame, an outer shear frame, and a lifting cylinder. One end of the lifting platform is hinged to the top of the stepped support. The inner and outer shear frames intersect and are centrally hinged. The tops of both the inner and outer shear frames are hinged to the bottom of the lifting platform. The bottom of the inner shear frame is hinged to the vehicle frame. A slider is hinged to the bottom of the outer shear frame. The slider is slidably connected to a groove on the vehicle frame. The cylinder body of the lifting cylinder is hinged to the vehicle frame. The output end of the lifting cylinder is hinged to the inner side of the outer shear frame.

[0010] Preferably, the rotating support includes an upper support, a lower support, a hydraulic rotating support, a step, a lifting cylinder, and a sliding device. The upper support is hinged to the telescopic ramp. The step is fixedly installed on the upper support and extends to the lower support. The hydraulic rotating support is fixedly installed on the lower support. The output end of the hydraulic rotating support is fixedly connected to the bottom of the upper support. The lifting cylinder is fixedly installed on the other side of the upper support away from the step. The lifting cylinder is located below the telescopic ramp and is used to adjust the slope of the telescopic ramp. The sliding device is used to drive the lower support to move laterally along the lifting platform.

[0011] Preferably, the sliding device includes a gear, a connecting rod, a group of pins, a second slider, and a second groove. The gear is mounted above the lower support and extends to the side of the lower support. The two gears are fixedly connected by the connecting rod. The gear is driven by the hydraulic system. The group of pins is installed laterally on both sides of the lifting platform. The gear meshes with the group of pins. The second slider is fixedly installed on both sides of the lower support. The second groove is opened laterally on the lifting platform below the group of pins. The second slider is slidably connected to the second groove.

[0012] Preferably, the telescopic ramp includes a fixed channel, a telescopic channel, a telescopic cylinder, and a connector. One end of the fixed channel is hinged to the upper support seat, and the telescopic channel is slidably mounted on the top of the fixed channel. The cylinder body of the telescopic cylinder is fixedly connected to the bottom of the fixed channel, and the output end of the telescopic cylinder is fixedly connected to the bottom of the telescopic channel. The connector is fixedly mounted on the end of the telescopic channel away from the fixed channel, and the connector is connected to the ship support.

[0013] Preferably, the connector includes a locking tongue, a V-shaped interface, and a compression spring. The locking tongue passes through both sides of the V-shaped interface, and the compression spring is sleeved on the locking tongue that passes through the V-shaped interface.

[0014] Preferably, side ladders are installed on both sides of the front of the frame. Each side ladder includes a side ladder bracket, a side ladder handrail, and a second step. The side ladder handrails are fixedly installed on both sides of the side ladder bracket, and the second step is fixedly installed in the middle of the side ladder bracket. A hook is installed on the top of the side ladder bracket, and the hook engages with the top of the frame.

[0015] The beneficial effects of this invention are as follows:

[0016] As can be seen from the above solutions, the embodiments of the present invention provide a large-scale mechanized gangway for ports. This gangway can not only adapt to tidal changes by adjusting its height, meeting the passage needs of disembarking personnel and ensuring their safety, but also features a rotating support that allows the telescopic ramp above the gangway to rotate 360° during gangway construction. The rotated ramp connects to the ship's support, facilitating storage when not in use and enabling rapid gangway construction, significantly reducing construction costs and improving efficiency. Furthermore, the rotating support can slide on the lifting platform assembly, solving the problems of high tides for several days each year and the ship's forward, backward, left, and right movement under wind and waves. This allows for rapid adjustment of the gangway's position without manual dragging, preventing gaps between the gangway and the ship's platform and ensuring the normal disembarking needs of personnel. Attached Figure Description

[0017] Figure 1 A front structural schematic diagram of a large mechanized gangway in a port, according to an embodiment of the present invention;

[0018] Figure 2 A top view showing a large mechanized gangway in a port according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the adaptive ladder in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the lifting platform assembly in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the rotating support in an embodiment of the present invention;

[0022] Figure 6 This is a top view of the rotating support in an embodiment of the present invention;

[0023] Figure 7 This is a side view of the retractable ramp in an embodiment of the present invention after it has been unfolded.

[0024] Figure 8 This is a top view showing the unfolded telescopic ramp in an embodiment of the present invention;

[0025] Figure 9 express Figure 8 A magnified view of part A in the middle;

[0026] Figure 10 This is a side view of the retractable ramp in an embodiment of the present invention when folded.

[0027] Figure 11 This is a schematic diagram of the side ladder in an embodiment of the present invention;

[0028] Figure 12 A structural schematic diagram showing the fixed position of the gangway before its installation in an embodiment of the present invention;

[0029] Figure 13 This is a schematic diagram showing the structure after the gangway is erected in an embodiment of the present invention;

[0030] Figure 14 This is a schematic diagram showing the structure after the gangway is erected and the tractor has driven away in an embodiment of the present invention.

[0031] In the diagram, 1. Tractor; 2. Adaptive Ladder; 21. Ladder Support; 22. Handrail; 23. Roller; 24. Linkage Rod; 25. Hinge Seat; 3. Lifting Platform Assembly; 31. Lifting Platform; 32. Guardrail; 33. Inner Shear Frame; 34. Outer Shear Frame; 35. Lifting Cylinder; 36. Slider 1; 37. Slide 1; 4. Rotary Support Seat; 41. Upper Support Seat; 42. Lower Support Seat; 43. Hydraulic Rotary Support; 44. Step 1; 45. Lifting cylinder; 5. Telescopic ramp; 51. Fixed passage; 52. Telescopic passage; 53. Telescopic cylinder; 6. Pedal; 7. Frame; 8. Front telescopic leg; 9. Rear telescopic leg; 10. Hydraulic system; 11. Gear; 12. Connecting rod; 13. Pin tooth group; 14. Slider II; 15. Slide II; 16. Locking tongue; 17. V-shaped interface; 18. Compression spring; 19. Side ladder bracket; 20. Step II; 60. Hook; 70. Push plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0033] Example

[0034] like Figures 1 to 13 As shown, this embodiment of the invention provides a large-scale mechanized gangway for ports, including a tractor 1, a trailer assembly, an adaptive step 2, a lifting platform assembly 3, a rotating support 4, and a telescopic ramp 5. The tractor 1 is a 4×2 highway semi-trailer tractor with a highway travel speed of not less than 85 km / h and a tractor height not exceeding 2.9 m. The tractor 1 is detachably connected to the front side of the trailer assembly. The detachment method is existing technology and will not be described in detail here. The adaptive step 2 is used to adjust the tilt angle of the steps 6 according to the slope of the gangway. One side of the adaptive step 2 is hinged to the trailer assembly, and the other side is hinged to the lifting platform assembly 3. The bottom of the lifting platform assembly 3 is hinged to the trailer assembly. The rotating support 4 is slidably connected to the side of the lifting platform assembly 3 away from the adaptive step 2. The top of the rotating support 4 is hinged to one end of the telescopic ramp 5. The rotating support 4 drives the telescopic ramp 5 to rotate in all directions. The other end of the telescopic ramp 5 is connected to a ship support.

[0035] Furthermore, the trailer assembly includes a frame 7, a front telescopic leg 8, and a rear telescopic leg 9. The front telescopic leg 8 and the rear telescopic leg 9 are respectively fixedly installed on the front and rear sides of the frame 7, and the front telescopic leg 8 and the rear telescopic leg 9 are driven and connected to the hydraulic system 10.

[0036] Furthermore, such as Figure 3As shown, the adaptive staircase 2 includes a staircase support 21, handrails 22, rollers 23, and connecting rods 24. The handrails 22 are installed on both sides of the staircase support 21, and multiple pedals 6 are installed in the middle of the staircase support 21. The front side of the multiple pedals 6 is hinged to the staircase support 21, and the rear side is hinged to the corresponding hinge seats 25 on the connecting rods 24. There are two connecting rods 24, which are arranged parallel to each other on both sides of the bottom of the staircase support 21. Multiple hinge seats 25 are fixedly installed on the upper part of each connecting rod 24. The hinge seats 25 correspond one-to-one with the pedals 6. The lower ends of the connecting rods 24 and the lower ends of the staircase support 21 are rotatably mounted on the frame 7. The hinge point between the connecting rods 24 and the frame 7 is on the same horizontal line as the hinge point between the staircase support 21 and the frame 7.

[0037] When the height of the lifting platform assembly 3 changes, the tilt angle of the step support 21 also changes accordingly. The step 6 expands or retracts under the action of the connecting rod 24, thereby enhancing the comfort of personnel passage.

[0038] Furthermore, such as Figure 4 As shown, the lifting platform assembly 3 includes a lifting platform 31, a railing 32, an inner shear frame 33, an outer shear frame 34, and a lifting cylinder 35. One end of the lifting platform 31 is hinged to the top of the step support 21. The inner shear frame 33 and the outer shear frame 34 intersect and are centrally hinged. The tops of the inner shear frame 33 and the outer shear frame 34 are both hinged to the bottom of the lifting platform 31. The bottom of the inner shear frame 33 is hinged to the frame 7. A slider 36 is hinged to the bottom of the outer shear frame 34. The slider 36 is slidably connected to a groove 37 on the frame 7. The cylinder body of the lifting cylinder 35 is hinged to the frame 7, and the output end of the lifting cylinder 35 is hinged to the inner side of the outer shear frame 34.

[0039] The lifting cylinder 35 pushes the outer shear frame 34 to move up and down, thereby causing the slider 36 at the bottom of the outer shear frame 34 to slide left and right along the slide groove 37. Since the outer shear frame 34 and the inner shear frame 33 are centrally hinged, the inner shear frame 33 is driven to move upward synchronously, thereby realizing the up and down movement of the lifting platform 31.

[0040] Furthermore, such as Figure 5 and Figure 6As shown, the rotating support 4 includes an upper support 41, a lower support 42, a hydraulic rotating support 43, a step 44, a lifting cylinder 45, and a sliding device. The upper support 41 is hinged to the telescopic ramp 5. The step 44 is fixedly installed on the upper support 41, extending to the lower support 42. The hydraulic rotating support 43 is fixedly installed on the lower support 42, and its output end is fixedly connected to the bottom of the upper support 41. The lifting cylinder 45 is fixedly installed on the other side of the upper support 41 away from the step 44. The lifting cylinder 45 is located below the telescopic ramp 5 and is used to adjust the slope of the telescopic ramp 5. The sliding device is used to drive the lower support 42 to move laterally along the lifting platform 31. The bottom of the lifting cylinder 45 has a push plate 70 with a ball joint, which fits against the bottom of the telescopic ramp 5 when it pushes.

[0041] When the telescopic ramp 5 needs to be unfolded for construction, the hydraulic rotary support 43 drives the upper support seat 41 to rotate, thereby causing the lifting cylinder 45 and the telescopic ramp 5 to rotate to the outside. The lifting cylinder 45 is then activated, and the lifting cylinder 45 is located below the telescopic ramp 5 to adjust the tilt angle of the telescopic ramp 5.

[0042] Furthermore, the sliding device includes a gear 11, a connecting rod 12, a pin tooth group 13, a second slider 14, and a second slide groove 15. The gear 11 is installed above the lower support 42 and extends to the side of the lower support 42. The two gears 11 are fixedly connected by the connecting rod 12. The gear 11 is driven by the hydraulic system 10. The pin tooth group 13 is installed laterally on both sides of the lifting platform 31. The gear 11 meshes with the pin tooth group 13. The second slider 14 is fixedly installed on both sides of the lower support 42. The second slide groove 15 is opened on the lifting platform 31 below the pin tooth group 13. The second slider 14 is slidably connected to the second slide groove 15.

[0043] When it is necessary to adjust the distance between the telescopic ramp 5 and the ship platform to meet the needs of the high tides for several days each year and the ship's forward, backward, left and right movement under the action of wind and waves, the hydraulic motor in the hydraulic system 10 drives the gear 11 to rotate. Since the gear 11 meshes with the pin teeth group 13 on both sides of the lifting platform 31, the lower support seat 42 moves back and forth along the lifting platform 31, thus completing the adjustment of the position of the telescopic ramp 5.

[0044] Furthermore, such as Figures 7 to 10As shown, the telescopic ramp 5 includes a fixed channel 51, a telescopic channel 52, a telescopic cylinder 53, and a connector. One end of the fixed channel 51 is hinged to the upper support 41. The telescopic channel 52 is slidably mounted on the top of the fixed channel 51. The cylinder body of the telescopic cylinder 53 is fixedly connected to the bottom of the fixed channel 51. The output end of the telescopic cylinder 53 is fixedly connected to the bottom of the telescopic channel 52. The connector is fixedly mounted on the end of the telescopic channel 52 away from the fixed channel 51. The connector is connected to the ship support.

[0045] Furthermore, such as Figure 9 As shown, the connector includes a locking tongue 16, a V-shaped interface 17, and a compression spring 18. The locking tongue 16 passes through both sides of the V-shaped interface 17, and the compression spring 18 is sleeved on the locking tongue 16 that passes through the V-shaped interface 17.

[0046] Furthermore, such as Figure 11 As shown, side ladders are installed on both sides of the front of the frame 7. The side ladder includes a side ladder bracket 19, a side ladder handrail, and a step 20. The side ladder handrail is fixedly installed on both sides of the side ladder bracket 19, and the step 20 is fixedly installed in the middle of the side ladder bracket 19. A hook 60 is installed on the top of the side ladder bracket 19, and the hook 60 is engaged with the top of the frame 7.

[0047] The working principle of this embodiment is as follows:

[0048] I. Preparations before erection

[0049] like Figure 12 As shown, before a large vessel berths, the location of the gangway entrance is planned, and a planned berthing centerline is marked. The port gangway erecting vehicle is then driven to the starting point of the planned berthing centerline, as shown in the diagram below. The vessel berths along the centerline. After the vessel has berthed, the centerline is adjusted according to the berthing status, and the port gangway erecting vehicle is driven to the endpoint. At this point, the distance between the gangway exit and the endpoint needs to be determined based on factors such as the ground level and the height of the vessel's hatches (ideally, it should be controlled between 13 and 17 meters).

[0050] II. Begin Erection

[0051] Power is switched on, and the hydraulic system 10 is activated. The front telescopic legs 8 and rear telescopic legs 9 are extended, and the frame 7 is leveled. Then, the lifting cylinder 35 pushes the outer shear frame 34 upward, which drives the inner shear frame 33 to move upward simultaneously, thereby raising the lifting platform 31. At this time, the raising of the lifting platform 31 causes the tilt angle of the step support 21 to change, thereby causing the pedal 6 to unfold. The hydraulic rotating support 43 is activated, which drives the upper support seat 41 to rotate horizontally, thereby opening the fixed channel 51 above the upper support seat 41 and the lifting platform. Hydraulic cylinder 45 rotates out synchronously, and simultaneously, lifting cylinder 45 is activated, pushing fixed channel 51 upward, thereby adjusting the tilt angle of fixed channel 51 to meet the disembarkation needs of personnel on board. Then, telescopic cylinder 53 is activated, pushing telescopic channel 52 outward, causing its end connector to engage with the ship's support. Next, a side ladder is manually erected, and corresponding handrails are installed, finally completing the erection of the gangway. After erection, tractor 1 can be driven away. Figure 14 As shown.

[0052] III. Usage Phase

[0053] like Figure 13 As shown, once erected, the gangway can be used immediately without human intervention. During loading, for safety reasons, the high-voltage power supply should be disconnected, and only 36-volt low-voltage power should be provided for monitoring, alarms, and nighttime lighting. During loading, the length of the telescopic ramp 5 can be adjusted by changing the angle (-2 to 15 degrees) to create a 5.5-meter height difference, which can solve the tidal fluctuation problem in existing ports in my country.

[0054] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A large-scale mechanized gangway for ports, characterized in that, The system includes a tractor (1), a trailer assembly, an adaptive ladder (2), a lifting platform assembly (3), a swivel support (4), and a telescopic ramp (5). The tractor (1) is detachably connected to the front of the trailer assembly. The adaptive ladder (2) is used to adjust the tilt angle of the steps (6) according to the slope of the gangway. One side of the adaptive ladder (2) is hinged to the trailer assembly, and the other side is hinged to the lifting platform assembly (3). The bottom of the lifting platform assembly (3) is hinged to the trailer assembly. The swivel support (4) is slidably connected to the side of the lifting platform assembly (3) away from the adaptive ladder (2). The top of the swivel support (4) is hinged to one end of the telescopic ramp (5). The swivel support (4) drives the telescopic ramp (5) to rotate in all directions. The other end of the telescopic ramp (5) is connected to the ship's support.

2. The large-scale mechanized gangway for ports according to claim 1, characterized in that, The trailer assembly includes a frame (7), a front telescopic leg (8) and a rear telescopic leg (9). The front telescopic leg (8) and the rear telescopic leg (9) are fixedly installed on the front and rear sides of the frame (7), respectively. The front telescopic leg (8) and the rear telescopic leg (9) are driven and connected to a hydraulic system (10).

3. The large-scale mechanized gangway for ports according to claim 2, characterized in that, The adaptive staircase (2) includes a staircase support (21), handrails (22), rollers (23), and connecting rods (24). The handrails (22) are installed on both sides of the staircase support (21), and a plurality of treads (6) are installed in the middle of the staircase support (21). The front sides of the plurality of treads (6) are hinged to the staircase support (21), and the rear sides are hinged to the corresponding hinge seats (25) on the connecting rods (24). There are two connecting rods (24). 4) Parallel arrangement on both sides of the bottom of the stepped support (21), each of the connecting rods (24) has multiple hinge seats (25) fixedly installed on its upper part, and the hinge seats (25) correspond one-to-one with the pedals (6). The lower ends of the connecting rods (24) and the lower ends of the stepped support (21) are rotatably mounted on the frame (7). The hinge point between the connecting rod (24) and the frame (7) is on the same horizontal line as the hinge point between the stepped support (21) and the frame (7).

4. The large-scale mechanized gangway for ports according to claim 3, characterized in that, The lifting platform assembly (3) includes a lifting platform (31), a railing (32), an inner shear frame (33), an outer shear frame (34), and a lifting cylinder (35). One end of the lifting platform (31) is hinged to the top of the step support (21). The inner shear frame (33) and the outer shear frame (34) are intersected and centrally hinged. The tops of the inner shear frame (33) and the outer shear frame (34) are both hinged to the bottom of the lifting platform (31). The bottom of the inner shear frame (33) is hinged to the frame (7). A slider (36) is hinged to the bottom of the outer shear frame (34). The slider (36) is slidably connected to a groove (37) on the frame (7). The cylinder body of the lifting cylinder (35) is hinged to the frame (7). The output end of the lifting cylinder (35) is hinged to the inner side of the outer shear frame (34).

5. The large-scale mechanized gangway for ports according to claim 4, characterized in that, The rotating support (4) includes an upper support (41), a lower support (42), a hydraulic rotating support (43), a step (44), a lifting cylinder (45), and a sliding device. The upper support (41) is hinged to the telescopic ramp (5). The step (44) is fixedly installed on the upper support (41). The step (44) extends to the lower support (42). The hydraulic rotating support (43) is fixedly installed on the lower support (42). The output end of the hydraulic rotating support (43) is fixedly connected to the bottom of the upper support (41). The lifting cylinder (45) is fixedly installed on the other side of the upper support (41) away from the step (44). The lifting cylinder (45) is located below the telescopic ramp (5) and is used to adjust the slope of the telescopic ramp (5). The sliding device is used to drive the lower support (42) to move laterally along the lifting platform (31).

6. The large-scale mechanized gangway for ports according to claim 5, characterized in that, The sliding device includes a gear (11), a connecting rod (12), a pin tooth group (13), a second slider (14), and a second slide groove (15). The gear (11) is installed above the lower support seat (42) and extends to the side of the lower support seat (42). The two gears (11) are fixedly connected by the connecting rod (12). The gear (11) is driven by the hydraulic system (10). The pin tooth group (13) is installed laterally on both sides of the lifting platform (31). The gear (11) meshes with the pin tooth group (13). The second slider (14) is fixedly installed on both sides of the lower support seat (42). The second slide groove (15) is opened laterally on the lifting platform (31) below the pin tooth group (13). The second slider (14) is slidably connected to the second slide groove (15).

7. The large-scale mechanized gangway for ports according to claim 5, characterized in that, The telescopic ramp (5) includes a fixed channel (51), a telescopic channel (52), a telescopic cylinder (53), and a connector. One end of the fixed channel (51) is hinged to the upper support (41). The telescopic channel (52) is slidably installed on the top of the fixed channel (51). The cylinder body of the telescopic cylinder (53) is fixedly connected to the bottom of the fixed channel (51). The output end of the telescopic cylinder (53) is fixedly connected to the bottom of the telescopic channel (52). The connector is fixedly installed on the end of the telescopic channel (52) away from the fixed channel (51). The connector is connected to the ship support.

8. The large-scale mechanized gangway for ports according to claim 7, characterized in that, The connector includes a locking tongue (16), a V-shaped interface (17), and a compression spring (18). The locking tongue (16) passes through both sides of the V-shaped interface (17), and the compression spring (18) is sleeved on the locking tongue (16) that passes through the V-shaped interface (17).

9. The large-scale mechanized gangway for ports according to claim 2, characterized in that, Side ladders are installed on both sides of the front of the frame (7). The side ladders include a side ladder bracket (19), a side ladder handrail, and a second step (20). The side ladder handrails are fixedly installed on both sides of the side ladder bracket (19), and the second step (20) is fixedly installed in the middle of the side ladder bracket (19). A hook (60) is installed on the top of the side ladder bracket (19), and the hook (60) is engaged with the top of the frame (7).

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