Offshore platform personnel embarkation gangway ladder with wave motion compensation function

Abstract

The utility model relates to the technical field of offshore mechanical equipment, and discloses an offshore platform personnel embarkation gangway ladder with a wave motion compensation function, which comprises a rack main body, a lifting platform is arranged on the rack main body, and a lifting mechanism capable of driving the lifting platform to lift is mounted on the rack main body; the offshore platform personnel embarkation gangway ladder with the wave motion compensation function comprises a lifting table, a telescopic gangway ladder is arranged on one side of the lifting table, a first telescopic oil cylinder is arranged between the telescopic gangway ladder and the lifting table, and the telescopic gangway ladder can be driven by the first telescopic oil cylinder to conduct pitch angle adjustment. The telescopic gangway ladder can effectively relieve shaking, the risk that people slip and fall or are injured is greatly reduced, the telescopic gangway ladder can be kept relatively stable, people can continuously and smoothly pass through the gangway ladder, and therefore the working efficiency is remarkably improved, and the using effect of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of marine machinery and equipment technology, specifically to a boarding gangway for personnel on a marine platform that has wave motion compensation function. Background Technology

[0002] The maintenance of offshore wind power is affected by sea conditions and weather. Over time, the impact of seawater and sea winds on the generator's function becomes increasingly severe. Therefore, the maintenance needs of offshore wind farms are greater than those of onshore wind power. Offshore wind power maintenance requires manual operation. To meet the operation and maintenance needs of offshore wind farms, it is usually necessary to use ships and gangways to lift personnel to the location of the corresponding wind turbines for maintenance. The ship serves as a support for the gangway, which is used to lift personnel to the sea level corresponding to the wind turbine. This boarding gangway, based on wave compensation technology, can adapt well to sea conditions and effectively improve the time available for boarding at sea.

[0003] In existing technologies, the height between the gangway and the platform cannot be adjusted in a timely manner when using a gangway at sea. In the marine environment, the rise and fall of waves is common, and the gangway will sway significantly with the movement of the waves. This poses a high safety risk to personnel boarding and disembarking. Personnel may lose their balance when using the gangway, resulting in falls, injuries, or even falling into the sea, seriously threatening their lives. Therefore, we propose a gangway for personnel boarding at sea platforms that has wave motion compensation function to solve the above-mentioned problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a boarding gangway for personnel on offshore platforms that has wave motion compensation function. This solves the problem that the height between the gangway and the platform cannot be adjusted in a timely manner. In the marine environment, the rise and fall of waves is common, and the gangway will sway significantly with the movement of the waves, which brings extremely high safety risks to personnel boarding and disembarking. Personnel may lose their balance when using the gangway, resulting in falls, injuries, or even falling into the sea.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a boarding gangway for personnel on a marine platform with wave motion compensation function, comprising a frame body, a lifting platform provided on the frame body, and a lifting mechanism that can drive the lifting platform to move up and down on the frame body;

[0006] A telescopic gangway is provided on one side of the lifting platform. A telescopic hydraulic cylinder is provided between the telescopic gangway and the lifting platform. The telescopic gangway can be driven to adjust the pitch angle through the telescopic hydraulic cylinder.

[0007] A contact plate is provided on one side of the telescopic gangway, and an ultrasonic displacement sensor is installed on the lower surface of the contact plate.

[0008] Preferably, the telescopic gangway includes a first ladder and a second ladder. The first ladder is hinged to one side of the lifting platform via a hinge shaft, and the second ladder can slide on the first ladder. Mounting plates are fixed to the lower surfaces of both the first and second ladders, and a telescopic hydraulic cylinder is fixedly installed between the two sets of mounting plates.

[0009] Preferably, the inner wall of the second ladder has limiting grooves on both sides, and the first ladder has multiple sets of limiting pulleys fixed on both sides that can roll in the limiting grooves. The abutment plate is fixed to one end of the second ladder.

[0010] Preferably, one end of the telescopic cylinder is hinged to the lifting platform via a hinge seat, and the other end of the telescopic cylinder is hinged to the first ladder via a hinge seat.

[0011] Preferably, the lifting mechanism includes fixed blocks arranged symmetrically on the upper surface of the frame body and a rotating shaft rotatably connected between the two sets of fixed blocks via bearings;

[0012] A winding roller is fixed to the surface of the rotating shaft. A servo motor that can drive the rotating shaft to rotate is fixedly installed on one side of the main frame body by bolts. One end of the rotating shaft is fixedly connected to the output end of the servo motor. A steel wire rope is wound around the surface of the winding roller. A sliding seat is slidable on the main frame body. One end of the steel wire rope is fixedly connected to the winding roller. The other end of the steel wire rope passes through the main frame body and is fixedly connected to the sliding seat. The lifting platform and the sliding seat are fixedly connected.

[0013] Preferably, the sliding seat slides on the frame body through the through hole, and multiple sets of sliding wheels are provided in the through hole. The sliding wheels are rotatably connected to the sliding seat through bearings. The sliding wheels are in contact with the surface of the frame body. The sliding wheels can reduce the friction between the sliding seat and the frame body.

[0014] Preferably, a buffer mechanism is installed on the contact plate, the buffer mechanism including two sets of universal wheels disposed below the contact plate, a base plate fixed to the upper surface of the universal wheels, and a sliding rod fixed to the upper surface of the base plate;

[0015] A connecting plate is fixedly installed between the top ends of the two sets of sliding rods. A spring is sleeved on the outer surface of the sliding rod. The two ends of the spring are fixedly connected to the connecting plate and the abutment plate, respectively. A sliding hole adapted to the sliding rod is opened on the surface of the abutment plate. The sliding rod and the abutment plate are slidably connected through this sliding hole.

[0016] Preferably, the lifting mechanism includes a wire rope, a support plate fixed to the frame body, a drive cylinder fixed to the support plate, and guide rails symmetrically arranged on the upper surface of the support plate. A movable seat is limited and slidable between the two sets of guide rails, and a guide wheel one is rotatably connected to the upper surface of the movable seat via a rotating shaft. A guide wheel two is symmetrically arranged on the upper surface of the support plate via a rotating shaft, and a guide wheel three is also symmetrically arranged on the upper surface of the support plate via a rotating shaft. A guide wheel seat symmetrically arranged is fixed on one side of the support plate, and a guide wheel four is rotatably connected to the guide wheel seat via a rotating shaft. The wire rope is joined in two strands and wound around the guide wheel one, and the two ends of the wire rope are respectively wound around the guide wheel two, guide wheel three, and guide wheel four in sequence, and are fixedly connected to the sliding seat. Beneficial effects

[0017] This invention provides a boarding gangway for personnel on offshore platforms that features wave motion compensation. Compared with existing technologies, it offers the following advantages:

[0018] The retractable gangway for personnel boarding offshore platforms, equipped with wave motion compensation, effectively reduces swaying, significantly lowering the risk of personnel falling or getting injured. The retractable gangway maintains relative stability, allowing personnel to pass through continuously and smoothly, thereby significantly improving operational efficiency and enhancing the effectiveness of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a partial view of the overall structure of this utility model;

[0021] Figure 3 This is a sectional view of the second ladder structure of this utility model;

[0022] Figure 4 This utility model Figure 3 An enlarged structural diagram at point A;

[0023] Figure 5 This is a schematic diagram of the lifting mechanism in this utility model.

[0024] In the diagram: 1. Frame body; 102. Lifting platform; 103. Telescopic cylinder one; 104. Contact plate; 105. Ultrasonic displacement sensor; 2. Telescopic gangway; 201. First ladder; 202. Second ladder; 203. Telescopic cylinder two; 204. Mounting plate; 205. Limiting slide; 206. Limiting pulley; 3. Lifting mechanism; 301. Servo motor; 302. Rotating shaft; 303. Rewinding roller; 304. Wire rope; 305. Fixing block; 306. Sliding seat; 307. Sliding wheel; 4. Buffer mechanism; 401. Sliding rod; 402. Base plate; 403. Universal wheel; 404. Connecting plate; 405. Spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1 As shown:

[0027] A boarding ladder for personnel on an offshore platform with wave motion compensation function includes a frame body 101.

[0028] In this implementation plan: To solve the technical problems existing in the prior art, such as the "in the prior art disclosed in the background technology above, the height between the gangway and the platform cannot be adjusted in a timely manner when transferring at sea. In the marine environment, the rise and fall of the waves is common, and the gangway will sway significantly with the movement of the waves, which brings extremely high safety risks to personnel getting on and off the ship. When using the gangway, personnel may lose their balance, resulting in falls, injuries, or even falling into the sea, seriously threatening their lives." In combination with the use, this problem is obviously a real and difficult problem to solve. All electrical equipment involved in this product is powered by an external power source.

[0029] Furthermore:

[0030] like Figures 1-4 As shown:

[0031] Based on the above: The frame body 101 is provided with a lifting platform 102, and the frame body 101 is equipped with a lifting mechanism 3 that can drive the lifting platform 102 to lift.

[0032] The lifting mechanism 3 includes fixed blocks 305 that are symmetrically arranged on the upper surface of the frame body 101 and a rotating shaft 302 that is rotatably connected between the two sets of fixed blocks 305 via bearings;

[0033] A winding roller 303 is fixed to the surface of the rotating shaft 302. A servo motor 301 that can drive the rotating shaft 302 to rotate is fixedly installed on one side of the frame body 101 by bolts. One end of the rotating shaft 302 is fixedly connected to the output end of the servo motor 301. A steel wire rope 304 is wound around the surface of the winding roller 303. A sliding seat 306 slides on the frame body 101. One end of the steel wire rope 304 is fixedly connected to the winding roller 303. The other end of the steel wire rope 304 passes through the frame body 101 and is fixedly connected to the sliding seat 306. The lifting platform 102 and the sliding seat 306 are fixedly connected.

[0034] The sliding seat 306 slides on the frame body 101 through the through hole, and multiple sets of sliding wheels 307 are provided in the through hole. The sliding wheels 307 are rotatably connected to the sliding seat 306 through bearings. The sliding wheels 307 are in contact with the surface of the frame body 101. The sliding wheels 307 can reduce the friction between the sliding seat 306 and the frame body 101.

[0035] A telescopic gangway 2 is provided on one side of the lifting platform 102. A telescopic hydraulic cylinder 103 is provided between the telescopic gangway 2 and the lifting platform 102. The telescopic gangway 2 can be driven to adjust the pitch angle through the telescopic hydraulic cylinder 103. A contact plate 104 is provided on one side of the telescopic gangway 2. An ultrasonic displacement sensor 105 is installed on the lower surface of the contact plate 104.

[0036] The telescopic gangway 2 includes a first ladder 201 and a second ladder 202. The first ladder 201 is hinged to one side of the lifting platform 102 via a hinge shaft. The second ladder 202 can slide on the first ladder 201. Mounting plates 204 are fixed on the lower surfaces of both the first ladder 201 and the second ladder 202. A telescopic hydraulic cylinder 203 is fixedly installed between the two sets of mounting plates 204.

[0037] The inner walls of the second ladder 202 are provided with limiting grooves 205 on both sides. The first ladder 201 has multiple sets of limiting pulleys 206 that can roll in the limiting grooves 205 on both sides. The contact plate 104 is fixed to one end of the second ladder 202.

[0038] One end of the telescopic cylinder 103 is hinged to the lifting platform 102 via a hinge seat 1, and the other end of the telescopic cylinder 103 is hinged to the first ladder 201 via a hinge seat 2.

[0039] In this implementation plan: When personnel board the gangway of the offshore platform equipped with wave motion compensation function, the servo motor 301 is activated according to the platform height. The servo motor 301 rotates the shaft 302, which in turn drives the winding roller 303 to rotate. The winding roller 303 releases the wire rope 304. At this time, the sliding seat 306 slides on the frame body 101, which drives the lifting platform 102 and the telescopic gangway 2 to move down synchronously. While the sliding seat 306 slides on the frame body 101;

[0040] By setting the sliding wheel 307, the frictional resistance between the sliding seat 306 and the frame body 101 can be reduced, and the smoothness of the sliding seat 306 movement can be improved.

[0041] The telescopic gangway 2 and the contact plate 104 move synchronously through the lifting platform 102. When the contact plate 104 drives the ultrasonic displacement sensor 105 to correspond with the platform, the distance between the ultrasonic displacement sensor 105 and the platform is a set value. When the ship moves the telescopic gangway 2 up and down due to the waves, the ultrasonic displacement sensor 105 detects a change in height and sends a signal to the servo motor 301. The controller (not shown in the figure) controls the start of the servo motor 301, which drives the rotating shaft 302 and the winding roller 303 to rotate. By winding or releasing the wire rope 304, the sliding seat 306 is pulled up and down. The sliding seat 306 drives the telescopic gangway 2 to adjust its height, thereby compensating for the relative height displacement caused by the waves and improving the stability of the telescopic gangway 2.

[0042] By activating the telescopic hydraulic cylinder 203, the second ladder 202 is moved, causing the limiting pulley 206 on the first ladder 201 to slide within the limiting groove 205 on the second ladder 202. The limiting groove 205 and the limiting pulley 206 enhance the stability of the sliding between the first ladder 201 and the second ladder 202. The sliding of the second ladder 202 on the first ladder 201 compensates for the horizontal displacement of the ship relative to the platform, preventing the telescopic gangway 2 from being affected by the horizontal displacement of the ship relative to the platform, thus providing greater stability.

[0043] By activating the telescopic hydraulic cylinder 103, the telescopic gangway 2 can be driven to rotate around the hinge axis, thereby changing the pitch angle of the telescopic gangway 2. Under different sea conditions and ship attitudes, the angle requirements faced by the telescopic gangway 2 are varied. The telescopic hydraulic cylinder 103 drives the telescopic gangway 2 to adjust the pitch angle, so that it can better adapt to various complex situations. Whether it is the large heave of the ship or the irregular impact of the waves, the telescopic gangway 2 can maintain a relatively stable connection with the ship and platform through flexible changes in angle, thereby ensuring the safety of personnel and materials during the transfer from the ship to the platform.

[0044] This operation effectively reduces the swaying of the telescopic gangway 2, greatly reducing the risk of personnel falling or getting injured. The telescopic gangway 2 can remain relatively stable, allowing personnel to pass through continuously and smoothly, thereby significantly improving work efficiency and the effectiveness of the device.

[0045] It should be noted that a ladder is installed on one side of the main frame 101 of the vessel;

[0046] The frame body 101 has a circular hole for the steel wire rope 304 to pass through, and multiple sets of annular ball bearings are installed in the circular hole. The ball bearings roll in the circular hole to reduce the friction between the frame body 101 and the steel wire rope 304.

[0047] Furthermore;

[0048] In an optional embodiment, a buffer mechanism 4 is installed on the contact plate 104. The buffer mechanism 4 includes two sets of casters 403 disposed below the contact plate 104, a base plate 402 fixed to the upper surface of the casters 403, and a sliding rod 401 fixed to the upper surface of the base plate 402.

[0049] A connecting plate 404 is fixedly installed between the top ends of the two sets of sliding rods 401. A spring 405 is sleeved on the outer surface of the sliding rod 401. The two ends of the spring 405 are fixedly connected to the connecting plate 404 and the contact plate 104 respectively. The surface of the contact plate 104 is provided with a sliding hole that matches the sliding rod 401. The sliding rod 401 and the contact plate 104 are slidably connected through this sliding hole.

[0050] In this embodiment, the contact plate 104 is positioned above the platform, and the caster wheel 403 is in contact with the platform. The presence of the caster wheel 403 reduces the friction between the contact plate 104 and the platform. When the caster wheel 403 contacts the platform, the impact force of the caster wheel 403 causes the sliding rod 401 to slide on the contact plate 104, and simultaneously causes the spring 405 to stretch. The spring 405 can buffer the impact force of the caster wheel 403, thereby preventing damage to the caster wheel 403 and the contact plate 104 due to a large impact force, and further improving the effectiveness of the device. Example

[0051] like Figure 5 As shown: The lifting mechanism 3 includes a wire rope 304, a support plate fixed on the frame body 101, a drive cylinder fixed on the support plate, and guide rails symmetrically arranged on the upper surface of the support plate. A movable seat is limited and slidable between the two sets of guide rails, and a guide wheel one is rotatably connected to the upper surface of the movable seat through a rotating shaft. A guide wheel two is symmetrically arranged on the upper surface of the support plate through a rotating shaft, and a guide wheel three is also symmetrically arranged on the upper surface of the support plate through a rotating shaft. A guide wheel seat symmetrically arranged is fixed on one side of the support plate, and a guide wheel four is rotatably connected to the guide wheel seat through a rotating shaft. The wire rope 304 is joined into two strands and wound around the guide wheel one. The two ends of the wire rope 304 are respectively wound around the guide wheel two, guide wheel three, and guide wheel four in sequence, and are fixedly connected to the sliding seat 306.

[0052] By activating the drive cylinder, the movable seat slides on the guide rail. Simultaneously, the movable seat moves the first guide wheel, which in turn pulls the wire rope 304. The wire rope 304 slides on the second, third, and fourth guide wheels, thereby pulling the sliding seat 306. In this process, the two strands of the wire rope 304 can be connected to pull the sliding seat 306. The two strands of the wire rope 304 are symmetrically distributed, which can increase the stability during the lifting process.

[0053] The guide rail has a convex structure design, and the lower surface of the movable seat has a convex groove. The movable seat slides on the guide rail, thereby enabling the limit operation.

[0054] The working principle and usage process of this utility model are as follows: When using the offshore platform boarding gangway equipped with wave motion compensation function, the servo motor 301 is activated according to the platform height. The servo motor 301 rotates the rotating shaft 302, which in turn drives the winding roller 303 to rotate, releasing the wire rope 304. At this time, the sliding seat 306 slides on the frame body 101, causing the lifting platform 102 and the telescopic gangway 2 to move downwards synchronously. While sliding on the main body 101, the sliding wheel 307 reduces the frictional resistance between the sliding seat 306 and the main body 101, improving the smoothness of the sliding seat 306's movement. The lifting platform 102 drives the telescopic gangway 2 and the contact plate 104 to move synchronously, positioning the contact plate 104 above the platform. At this point, the caster 403 contacts the platform. The caster 403 further reduces friction between the contact plate 104 and the platform. When the caster 403 contacts the platform, the impact force of the caster 403 will cause the sliding seat 306 to move smoothly. The movable rod 401 slides on the contact plate 104, simultaneously stretching the spring 405. The spring 405 buffers the impact force of the caster wheel 403, preventing damage to the caster wheel 403 and the contact plate 104 due to excessive impact, thus improving the device's effectiveness. When the contact plate 104 aligns the ultrasonic displacement sensor 105 with the platform, the distance between the ultrasonic displacement sensor 105 and the platform is a set value. When the ship moves up and down due to waves, the telescopic gangway 2... When the ultrasonic displacement sensor 105 detects a change in height, it sends a signal to the servo motor 301. The controller (not shown in the figure) then starts the servo motor 301, which drives the rotating shaft 302 and the winding roller 303 to rotate. By winding or releasing the wire rope 304, the sliding seat 306 is pulled up and down. The sliding seat 306 drives the telescopic gangway 2 to adjust its height, thereby compensating for the relative height displacement caused by the waves and improving the stability of the telescopic gangway 2.

[0055] Furthermore, by activating the second telescopic cylinder 203, the second ladder 202 is moved, causing the limiting pulley 206 on the first ladder 201 to slide within the limiting groove 205 on the second ladder 202. The limiting groove 205 and the limiting pulley 206 enhance the stability of the sliding between the first and second ladders 201 and 202. The sliding of the second ladder 202 on the first ladder 201 compensates for the horizontal displacement of the ship relative to the platform, preventing the telescopic gangway 2 from being affected by the horizontal displacement of the ship relative to the platform, thus providing greater stability. Activating the first telescopic cylinder 103 drives the telescopic gangway 2 to rotate around the hinge axis, thereby changing the pitch angle of the telescopic gangway 2. Under different sea conditions and ship attitudes, the angle requirements of the telescopic gangway 2 are varied. The telescopic cylinder 103 drives the telescopic gangway 2 to adjust its pitch angle, enabling it to better adapt to various complex situations. Whether it is the significant heave or swaying of the ship or the irregular impact of waves, the telescopic gangway 2 can maintain a relatively stable connection with the ship and platform through flexible angle changes, thereby ensuring the safety of personnel and materials during the transfer from the ship to the platform. Through this operation, the telescopic gangway 2 can effectively reduce this swaying, greatly reducing the risk of personnel falling or being injured. The telescopic gangway 2 can maintain relative stability, allowing personnel to pass continuously and smoothly, thus significantly improving operational efficiency and the effectiveness of the device.

[0056] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A personnel boarding gangway for offshore platforms capable of wave motion compensation, comprising a frame main body (101), characterized in that, The rack body (101) is provided with a lifting platform (102), and the rack body (101) is provided with a lifting mechanism (3) capable of driving the lifting platform (102) to lift; One side of the lifting platform (102) is provided with a telescopic gangway (2), and a telescopic oil cylinder (103) is arranged between the telescopic gangway (2) and the lifting platform (102), so that the telescopic gangway (2) can be driven to adjust the pitch angle through the telescopic oil cylinder (103); One side of the telescopic gangway (2) is provided with a contact plate (104), and the lower surface of the contact plate (104) is provided with an ultrasonic displacement sensor (105).

2. The offshore platform personnel boarding gangway with wave compensation function according to claim 1, characterized in that: The telescopic gangway (2) comprises a first ladder (201) and a second ladder (202), the first ladder (201) is hinged to one side of the lifting platform (102) through a hinge shaft, the second ladder (202) can slide on the first ladder (201), the lower surfaces of the first ladder (201) and the second ladder (202) are fixedly provided with mounting plates (204), and the two groups of mounting plates (204) are fixedly provided with a telescopic oil cylinder (203).

3. The offshore platform personnel access gangway with wave compensation capability of claim 2, wherein: The inner walls of the second ladder (202) are provided with limiting sliding grooves (205) on both sides, the sides of the first ladder (201) are fixedly provided with a plurality of limiting pulleys (206) which can roll in the limiting sliding grooves (205), and the contact plate (104) is fixed to one end of the second ladder (202).

4. The offshore platform personnel access gangway with wave compensation capability of claim 1, wherein: One end of the telescopic oil cylinder (103) is hinged to the lifting platform (102) through a hinge seat (1), and the other end of the telescopic oil cylinder (103) is hinged to the first ladder (201) through a hinge seat (2).

5. The offshore platform personnel access gangway with wave compensation capability of claim 1, wherein: The lifting mechanism (3) comprises fixed blocks (305) fixed to the upper surface of the rack body (101) and arranged symmetrically, and a rotating shaft (302) rotatably connected between the two groups of fixed blocks (305); The surface of the rotating shaft (302) is fixedly provided with a winding stick (303), one side of the rack body (101) is fixedly provided with a servo motor (301) capable of driving the rotating shaft (302) to rotate through a bolt, one end of the rotating shaft (302) is fixedly connected with the output end of the servo motor (301), the surface of the winding stick (303) is provided with a steel wire rope (304), the rack body (101) is provided with a sliding seat (306), one end of the steel wire rope (304) is fixedly connected with the winding stick (303), the other end of the steel wire rope (304) penetrates through the rack body (101) and is fixedly connected with the sliding seat (306), and the lifting platform (102) is fixedly connected with the sliding seat (306).

6. The offshore platform personnel access gangway with wave compensation capability of claim 5, wherein: The sliding seat (306) slides on the rack body (101) through the through hole, and a plurality of sliding wheels (307) are arranged in the through hole, the sliding wheels (307) are rotatably connected with the sliding seat (306) through bearings, the sliding wheels (307) are in contact with the surface of the rack body (101), and the friction between the sliding seat (306) and the rack body (101) can be reduced through the sliding wheels (307).

7. The offshore platform personnel access gangway with wave compensation capability of claim 1, wherein: The buffer mechanism (4) is installed on the abutting plate (104), the buffer mechanism (4) includes two groups of universal wheels (403) arranged below the abutting plate (104), a base plate (402) fixed on the upper surface of the universal wheel (403) and a sliding rod (401) fixed on the upper surface of the base plate (402); The top ends of the two groups of sliding rods (401) are fixedly installed with a connecting plate (404), the outer surfaces of the sliding rods (401) are sleeved with springs (405), the two ends of the spring (405) are fixedly connected with the connecting plate (404) and the abutting plate (104) respectively, the surface of the abutting plate (104) is provided with a sliding hole matched with the sliding rod (401), and the sliding rod (401) and the abutting plate (104) are slidably connected through the sliding hole.

8. The offshore platform personnel access gangway with wave compensation capability of claim 1, wherein: The lifting mechanism (3) includes a steel wire rope (304), a support plate fixed on the rack main body (101), a driving oil cylinder fixed on the support plate, guide rails fixed on the upper surface of the support plate and arranged in symmetry, a moving seat limitedly and slidably arranged between the two groups of guide rails, a guide wheel one rotatably connected with the upper surface of the moving seat through a rotating shaft, guide wheels two rotatably connected with the upper surface of the support plate through rotating shafts, guide wheels three rotatably connected with the upper surface of the support plate through rotating shafts, guide wheel seats fixed on one side of the support plate and arranged in symmetry, and guide wheels four rotatably connected with the guide wheel seats through rotating shafts, the steel wire rope (304) is connected into two strands and wound on the guide wheel one, and the two ends of the steel wire rope (304) are sequentially wound on the guide wheels two, three and four and fixedly connected with the moving seat (306).

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