A wave vertical motion compensation mechanism for offshore platform personnel boarding gangway

Abstract

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

Description

Technical Field

[0001] The invention relates to the technical field of offshore transfer operation equipment, in particular to a wave vertical motion compensation mechanism for offshore platform personnel to board a gangway. Background Art

[0002] The gangway for boarding personnel on offshore platforms is an important facility that connects ships and offshore platforms for the safe boarding and disembarking of personnel. Gangways are widely used in offshore platforms, ships or ports. Under existing technical conditions, the gangway usually contacts the platform or deck to be landed by changing the pitch angle. During use, due to the complexity of the offshore environment, under the action of waves, the gangway will fluctuate greatly, and personnel may easily lose balance and fall, or even fall into the sea from the gangway, causing serious casualties. Especially in severe weather and sea conditions, this risk will increase exponentially and the danger will increase significantly. Therefore, we propose a wave vertical motion compensation mechanism for the gangway for boarding personnel on offshore platforms to solve the above-mentioned problems. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a wave vertical motion compensation mechanism for offshore platform personnel boarding gangway, which solves the problem that under the action of waves, the gangway will fluctuate greatly up and down, and personnel may easily lose balance and fall, or even fall from the gangway into the sea, causing serious casualties. Especially in severe weather and sea conditions, this risk will increase exponentially and the danger will increase significantly.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A wave vertical motion compensation mechanism for offshore platform personnel to board a gangway, comprising a ship body, wherein a first platform and a second platform are respectively arranged on one side of the ship body;

[0005] A telescopic gangway is connected between the first platform and the second platform, a wave-compensating embarkation and disembarkation ladder is hingedly connected to one side of the second platform through a hinge shaft, symmetrically arranged brackets are fixed to the lower surface of the second platform, one end of the bracket is hingedly connected to a hydraulic push rod through a hinge seat, and the output end of the hydraulic push rod is hingedly connected to the wave-compensating embarkation and disembarkation ladder through a hinge seat;

[0006] The ship body is provided with a lifting gangway compensation mechanism which can adjust the wave compensation embarkation and disembarkation gangway up and down.

[0007] Preferably, the telescopic gangway ladder comprises a first gangway ladder hinged on one side of the first platform through a hinge shaft and a second gangway ladder hinged on one side of the second platform through a hinge shaft, multiple sets of limiting pulleys are installed on both sides of the first gangway ladder, and slide groove seats are fixed on both sides of the inner side wall of the second gangway ladder.

[0008] Preferably, the lifting gangway compensation mechanism comprises a telescopic oil cylinder fixed on the top of the ship body, a steel wire rope fixed on the output end of the telescopic oil cylinder, and a slide rail fixed on one side of the ship body and arranged symmetrically;

[0009] A mounting frame is provided between the two groups of slide rails, two limiting pulleys are installed on both sides of the mounting frame, the mounting frame is fixedly connected to the second platform, and a guide wheel is provided on the side of the ship body close to the wire rope;

[0010] A laser distance measuring sensor is arranged at one end of the wave compensating embarkation and disembarkation ladder.

[0011] Preferably, an anti-falling plate is fixedly installed at the bottom between the two groups of slide rails, and a buffer mechanism is installed on the anti-falling plate.

[0012] Preferably, two groups of limit seats are provided on the surface of the ship body, and symmetrically arranged limit rods are fixed inside the limit seats. A sliding seat slides between the two groups of limit rods, a connecting rod is fixed on one side of the sliding seat, and the other end of the connecting rod is fixed to the bottom of the second platform.

[0013] Preferably, the wave-compensating embarkation and disembarkation ladder is provided with a guide mechanism which facilitates the disassembly, installation, inspection and maintenance of the laser ranging sensor.

[0014] Preferably, the guide mechanism comprises a rectangular groove provided on the lower surface of the wave compensation embarkation and disembarkation ladder, straight rods arranged symmetrically inside the rectangular groove, and sliders arranged on two groups of the straight rods;

[0015] The slide block slides on the two sets of straight rods through the sliding sleeve;

[0016] The two groups of straight rods are designed to be inclined downward from left to right, and a rectangular hole is provided on the side of the surface of the wave compensation boarding and disembarking ladder close to the second platform.

[0017] Preferably, a buffer plate is provided between the two ends of the two groups of straight rods, and springs are wound around the two ends of the straight rods.

[0018] Preferably, a first electromagnet is provided on a buffer plate away from a group of the second platform.

[0019] Preferably, a support mechanism capable of supporting the second platform is installed on the ship body, and the support mechanism comprises a support seat fixed on the surface of the ship body, a top plate sliding inside the support seat, and metal sheets fixed on both sides of the top plate;

[0020] The two sides of the support seat are fixed with symmetrically arranged fixing ears, and the second electromagnet is installed on the side where the two groups of fixing ears are close to each other, and the metal sheet is made of iron material.

[0021] Beneficial Effects

[0022] The present invention provides a wave vertical motion compensation mechanism for offshore platform personnel to board a gangway. Compared with the prior art, it has the following beneficial effects:

[0023] The wave vertical motion compensation mechanism of the offshore platform personnel boarding gangway can monitor the distance change in real time and quickly transmit information to the control system so that the telescopic cylinder can be adjusted in time to maintain a safe distance between the wave compensation boarding and disembarking gangway and the transport boat. This can significantly reduce the risk of personnel or cargo falling due to distance changes during the boarding and disembarking process, avoid serious casualties, and improve the boarding and disembarking experience of personnel and cargo. The fast-response distance adjustment can reduce the waiting time caused by wave fluctuations and improve operational efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a top view of the overall structure of the present invention;

[0026] Figure 3 It is a partial cross-sectional view of the slide rail and the limit seat structure of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the bracket and the hydraulic push rod and other connecting parts of the present invention;

[0028] Figure 5 For the present invention as a whole Figure 4 A magnified schematic diagram of point A;

[0029] Figure 6 This is a cross-sectional view of the support seat structure of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the telescopic gangway ladder of the present invention;

[0031] Figure 8 It is a schematic diagram of the structure of the telescopic oil cylinder and connecting parts such as steel wire ropes of the present invention.

[0032] In the figure: 101, ship body; 102, first platform; 103, second platform; 104, wave compensation embarkation and disembarkation ladder; 105, bracket; 106, hydraulic push rod; 2, telescopic ladder; 201, first ladder; 202, second ladder; 203, limit pulley 1; 204, slide seat; 3, lifting ladder compensation mechanism; 301, telescopic cylinder; 302, wire rope; 303, fixed seat; 304, guide wheel; 305, slide rail; 306, mounting frame; 307, limit Pulley 2; 308, limit seat; 309, limit rod 1; 310, sliding seat; 311, connecting rod; 312, laser ranging sensor; 313, anti-falling plate; 4, guiding mechanism; 401, rectangular groove; 402, straight rod; 403, slider; 404, buffer plate; 405, first electromagnet; 406, spring; 407, rectangular hole; 5, supporting mechanism; 501, supporting seat; 502, top plate; 503, metal sheet; 504, fixing ear; 505, second electromagnet. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figure 1 As shown:

[0035] A wave vertical motion compensation mechanism for offshore platform personnel to board a gangway comprises a ship body 101.

[0036] In this implementation scheme: In order to solve the technical problems existing in this prior art, as disclosed in the background technology above, "under the action of the waves, the gangway ladder will fluctuate greatly, and people are very likely to lose balance and fall, and may even fall from the gangway ladder into the sea, causing serious casualties. Especially in severe weather and sea conditions, this risk will increase exponentially and the danger will increase significantly." In combination with use, this problem is obviously a real problem that exists and is relatively difficult to solve. The electrical equipment involved in this product is all powered by an external power supply.

[0037] More specifically:

[0038] like Figure 1-Figure 7 As shown:

[0039] In combination with the above content: a first platform 102 and a second platform 103 are respectively provided on one side of the ship body 101;

[0040] A telescopic gangway 2 is connected between the first platform 102 and the second platform 103;

[0041] The telescopic gangway 2 comprises a first gangway 201 hinged to one side of the first platform 102 through a hinge shaft and a second gangway 202 hinged to one side of the second platform 103 through a hinge shaft. A plurality of sets of limiting pulleys 203 are installed on both sides of the first gangway 201. A slide groove seat 204 is fixed on both sides of the inner wall of the second gangway 202. The limiting pulley 203 can slide in the limiting groove inside the slide groove seat 204, so as to realize the mutual connection and sliding of the first gangway 201 and the second gangway 202.

[0042] A wave compensation embarkation and disembarkation ladder 104 is hingedly connected to one side of the second platform 103 through a hinge shaft, and symmetrically arranged brackets 105 are fixed to the lower surface of the second platform 103. A hydraulic push rod 106 is hingedly connected to one end of the bracket 105 through a hinge seat, and the output end of the hydraulic push rod 106 is hinged to the wave compensation embarkation and disembarkation ladder 104 through a hinge seat.

[0043] The ship body 101 is provided with a lifting and lowering gangway compensation mechanism 3 which can adjust the wave compensation embarkation and disembarkation gangway 104 up and down;

[0044] The lifting gangway compensation mechanism 3 includes a telescopic cylinder 301 fixed on the top of the ship body 101, a steel wire rope 302 fixed on the output end of the telescopic cylinder 301, and a symmetrically arranged slide rail 305 fixed on one side of the ship body 101;

[0045] A mounting frame 306 is provided between the two sets of slide rails 305, and two limiting pulleys 307 that can roll in the sliding grooves of the slide rails 305 are installed on both sides of the mounting frame 306. The mounting frame 306 slides in the slide rails 305 through the limiting pulleys 307, and the mounting frame 306 can be stably limited and slid. The mounting frame 306 is fixedly connected to the second platform 103, and a fixing seat 303 is fixed on the side of the ship body 101 close to the wire rope 302. The fixing seat 303 is rotatably connected to the guide wheel component 304 through a rotating shaft, and one end of the wire rope 302 is wound around the surface of the guide wheel component 304 and fixed to the upper surface of the mounting frame 306;

[0046] A laser rangefinder sensor 312 is provided at one end of the wave compensation embarkation and disembarkation ladder 104;

[0047] An anti-falling plate 313 is fixedly installed at the bottom between the two sets of slide rails 305 to prevent the mounting frame 306 from falling off, and a buffer mechanism is installed on the anti-falling plate 313;

[0048] The surface of the ship body 101 is located on both sides of the two sets of slide rails 305, and the limiting seats 308 are fixed inside. The limiting rods 309 arranged symmetrically are fixed inside the limiting seats 308. A sliding seat 310 slides between the two sets of limiting rods 309. A connecting rod 311 is fixed on one side of the sliding seat 310. The other end of the connecting rod 311 is fixed on the side of the bottom of the second platform 103 away from the mounting frame 306. The connecting rod 311 increases the support strength of the second platform 103;

[0049] The wave compensation embarkation and disembarkation ladder 104 is provided with a guide mechanism 4 for facilitating disassembly, installation, inspection and maintenance of the laser distance measuring sensor 312;

[0050] The guide mechanism 4 comprises a rectangular groove 401 provided on the lower surface of the wave compensation embarkation and disembarkation ladder 104, straight rods 402 arranged symmetrically inside the rectangular groove 401, and sliders 403 arranged on the two groups of straight rods 402;

[0051] The slider 403 slides on the two sets of straight rods 402 through the sliding sleeve;

[0052] The two groups of straight rods 402 are designed to be inclined downward from left to right, and a rectangular hole 407 is opened on the surface of the wave compensation boarding and disembarking gangway 104 near the second platform 103;

[0053] A buffer plate 404 is provided between the two ends of the two groups of straight rods 402. The buffer plate 404 can slide on the two groups of straight rods 402 through the through holes. Springs 406 are wound around the two ends of the straight rods 402. The two ends of the spring 406 are respectively fixedly connected to the buffer plate 404 and the wave compensation boarding and disembarking gangway 104. The buffer plate 404 of the group away from the second platform 103 is provided with a first electromagnet 405.

[0054] In this embodiment, when the wave vertical motion compensation mechanism of the boarding gangway of the offshore platform is used, the hydraulic push rod 106 is first started, and the wave compensation boarding gangway 104 is driven to perform a circular motion with the hinge axis as the center through the continuous contraction of the hydraulic push rod 106, until the wave compensation boarding gangway 104 is turned over to 90 degrees;

[0055] When the wave compensation embarkation and disembarkation ladder 104 is flipped to 90 degrees, the two groups of straight rods 402 are designed to be tilted downward from left to right (not shown in the figure). At this time, the slider 403 drives the laser distance sensor 312 to slide on the straight rod 402 through the sliding sleeve until the slider 403 moves to the end of the wave compensation embarkation and disembarkation ladder 104 away from the second platform 103 and contacts the buffer plate 404. When the slider 403 hits the buffer plate 404, the spring 406 can buffer the impact of the buffer plate 404, thereby effectively avoiding damage to the laser distance sensor 312 due to the large impact force of the slider 403, thereby improving the use effect of the device. When the wave compensation board 104 is touched, the first electromagnet 405 can be energized. At this time, the magnetic force generated by the first electromagnet 405 attracts the slider 403, so that the slider 403 and the buffer plate 404 are fixed, thereby improving the stability of the laser ranging sensor 312 in the distance detection process in the later stage. Through the setting of the guide mechanism 4, when the wave compensation boarding and disembarking gangway 104 is folded and reset in the later stage, the gravity of the slider 403 itself will drive the laser ranging sensor 312 to move to the end of the wave compensation boarding and disembarking gangway 104 close to the second platform 103. The staff can disassemble and maintain the laser ranging sensor 312 through the rectangular hole 407, thereby providing convenience for the maintenance of the laser ranging sensor 312;

[0056] Then, the telescopic oil cylinder 301 is started to release the steel wire rope 302. At this time, the steel wire rope 302 moves on the guide wheel 304. The setting of the guide wheel 304 reduces the friction between the steel wire rope 302 and the ship body 101, thereby avoiding damage to the steel wire rope 302 due to friction, and extending the service life of the steel wire rope 302.

[0057] As the steel wire rope 302 is continuously released, the mounting frame 306 slides stably in the two sets of slide rails 305 through the limiting pulley 307. When the mounting frame 306 moves downward, it drives the second platform 103 and the wave compensation boarding and disembarking gangway 104 to move downward synchronously. At this time, the connecting rod 311 under the second platform 103 slides on the surface of the limiting rod 1 309 through the sliding seat 310. The other end of the second platform 103 is supported by the setting of the connecting rod 311, thereby increasing the stability of the connection between the second platform 103 and the mounting frame 306;

[0058] When the second platform 103 moves downward, the second gangway 202 is also stretched. At this time, the limiting pulley 203 on the first gangway 201 can slide on the slide seat 204, thereby extending to the entire length of the first gangway 201 and the second gangway 202. Through the mutual extension and retraction of the first gangway 201 and the second gangway 202, when the second platform 103 moves downward, the connection between the first platform 102 and the second platform 103 and the telescopic gangway 2 is not affected. As the wave compensation boarding and disembarking gangway 104 continues to move downward, one end of the wave compensation boarding and disembarking gangway 104 is located above the transportation boat (not shown in the figure). At this time, the laser ranging sensor 312 on the wave compensation boarding and disembarking gangway 104 can detect the distance from the wave compensation boarding and disembarking gangway 104 to the transportation boat. When a certain distance is reached, the laser ranging sensor 312 can send a signal to the controller (not shown in the figure), and the telescopic cylinder 301 is stopped through the controller.

[0059] When the ship body 101 sways up and down with the depth of the waves, the distance between the laser ranging sensor 312 and the transport boat keeps increasing or decreasing. At this time, the laser ranging sensor 312 transmits a signal to the telescopic cylinder 301. The telescopic cylinder 301 contracts or extends to stretch or release the second platform 103 and the wave compensation boarding and disembarking gangway 104, so that the distance between the wave compensation boarding and disembarking gangway 104 and the transport boat can be adjusted to be consistent. Through this operation, the distance change can be monitored in real time, and the information can be quickly transmitted to the control system, so that the telescopic cylinder 301 can be adjusted in time to maintain a safe distance between the wave compensation boarding and disembarking gangway 104 and the transport boat, which can significantly reduce the risk of people or goods falling due to distance changes during the boarding and disembarking process, avoid serious casualties, and improve the boarding and disembarking experience of people and goods. The fast-response distance adjustment can reduce the waiting time caused by wave fluctuations and improve work efficiency.

[0060] It should be noted that a battery for supplying power to the laser ranging sensor 312 is installed on the slider 403 .

[0061] The buffer mechanism is a buffer spring installed on the anti-drop plate 313 to achieve impact buffering effect.

[0062] Going further;

[0063] In an optional embodiment, a support mechanism 5 for supporting the second platform 103 is installed on the ship body 101, and the support mechanism 5 includes a support seat 501 fixed on the surface of the ship body 101, a top plate 502 sliding inside the support seat 501, and metal sheets 503 fixed on both sides of the top plate 502;

[0064] Symmetrically arranged fixing ears 504 are fixed on both sides of the support seat 501, and a second electromagnet 505 is fixedly installed on the side where the two groups of fixing ears 504 are close to each other through an opening for mounting, and the metal sheet 503 is located between the two groups of second electromagnets 505. A sliding groove matched with the top plate 502 is opened inside the support seat 501, and the top plate 502 and the support seat 501 are slidably connected through the sliding groove. Moving holes matched with the metal sheet 503 are opened on both sides of the support seat 501, and the metal sheet 503 and the support seat 501 are slidably connected through the moving holes, and the metal sheet 503 is made of iron material.

[0065] In this embodiment: after the use of this structure is completed, the hydraulic push rod 106 is started to fold and reset the wave compensation boarding and disembarking gangway 104. At this time, the telescopic cylinder 301 is started to shrink, and the wire rope 302 is pulled, so that the wire rope 302 drives the mounting frame 306 to move up synchronously. At this time, the second electromagnet 505 on one side of the support seat 501 is energized, and the two groups of second electromagnets 505 on the other side are de-energized. At this time, the suction force generated by the energized group of second electromagnets 505 attracts the metal sheet 503. At this time, the metal sheet 503 drives the top plate 502 to move completely into the support seat 501. When the wire rope 302 pulls the mounting frame 306 to move above the top plate 502, the energized second electromagnet 505 505 is powered off, and the second electromagnet 505 that was not powered on before is powered on. The second electromagnet 505 generates a magnetic attraction force to absorb the metal sheet 503, and then the top plate 502 is partially moved out of the support seat 501 through the metal sheet 503. At this time, the mounting frame 306 can be on the upper surface of the top plate 502 to support the mounting frame 306. The extension of the top plate 502 provides an additional support point for the second platform 103, thereby enhancing the stability of the entire structure. At this time, the wire rope 302 no longer needs to bear the entire weight alone, which greatly reduces the burden of the wire rope 302 under continuous stress, thereby reducing the risk of fatigue, wear and even breakage of the wire rope 302 due to long-term high-intensity stress.

[0066] Embodiment 2;

[0067] like Figure 8As shown: the guide wheel member 304 may include a main guide wheel, two groups of guide wheels 2, two groups of guide wheels 3 and a guide wheel 4. A symmetrically arranged guide rail is also fixed on the ship body 101, and a movable seat is slidably provided on the upper limit position of the slide rail, and the main guide wheel rotates on the movable seat through a rotating shaft. The two groups of guide wheels 2 and the two groups of guide wheels 3 are symmetrically arranged on the ship body 101 through the rotating shaft, and rotate on the ship body 101, while the guide wheel 4 rotates with the fixed seat 303 through the rotating shaft, and the fixed seat 303 is fixed on one side of the ship body 101. Then, the wire rope 302 can be divided into two strands and wound around the main guide wheel. At the same time, the two strands of the wire rope 302 are The ends are respectively wound around guide wheel two, guide wheel three and guide wheel four in sequence, and are fixedly connected to the upper surface of the mounting frame 306. During the contraction of the telescopic cylinder 301, the moving seat is driven to slide on the guide rail, and the moving seat drives the main guide wheel to move, thereby driving the wire rope 302 to be pulled. The wire rope 302 slides on guide wheel two, guide wheel three and guide wheel four, thereby pulling the mounting frame 306. In this process, through this structure, the wire rope 302 can be connected in two strands to pull the mounting frame 306. The two wire ropes 302 are symmetrically distributed, which can increase the stability during the lifting process.

[0068] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A wave vertical motion compensation mechanism for offshore platform personnel to board a gangway, comprising a ship body (101), characterized in that: A first platform (102) and a second platform (103) are respectively provided on one side of the ship body (101); A telescopic gangway (2) is connected between the first platform (102) and the second platform (103); a wave-compensating embarkation and disembarkation ladder (104) is hingedly connected to one side of the second platform (103) via a hinge shaft; symmetrically arranged brackets (105) are fixed to the lower surface of the second platform (103); one end of the bracket (105) is hingedly connected to a hydraulic push rod (106) via a hinge seat; and an output end of the hydraulic push rod (106) is hingedly connected to the wave-compensating embarkation and disembarkation ladder (104) via a hinge seat; The ship body (101) is provided with a lifting gangway compensation mechanism (3) capable of adjusting the wave compensation embarkation and disembarkation gangway (104) up and down.

2. The wave vertical motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 1, characterized in that: The telescopic gangway (2) comprises a first gangway (201) hinged on one side of the first platform (102) through a hinge shaft and a second gangway (202) hinged on one side of the second platform (103) through a hinge shaft, a plurality of sets of limiting pulleys (203) are installed on both sides of the first gangway (201), and sliding groove seats (204) are fixed on both sides of the inner wall of the second gangway (202).

3. The wave vertical motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 1, characterized in that: The lifting gangway compensation mechanism (3) comprises a telescopic oil cylinder (301) fixed on the top of the ship body (101), a steel wire rope (302) fixed on the output end of the telescopic oil cylinder (301), and a symmetrically arranged slide rail (305) fixed on one side of the ship body (101); A mounting frame (306) is provided between the two groups of slide rails (305), two limiting pulleys (307) are installed on both sides of the mounting frame (306), the mounting frame (306) is fixedly connected to the second platform (103), and a guide wheel (304) is provided on the side of the ship body (101) close to the wire rope (302); A laser distance measuring sensor (312) is provided at one end of the wave-compensating embarkation and disembarkation ladder (104).

4. The wave vertical motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 3 is characterized by: An anti-falling plate (313) is fixedly installed at the bottom between the two groups of slide rails (305), and a buffer mechanism is installed on the anti-falling plate (313).

5. The wave vertical motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 4, characterized in that: Two groups of limit seats (308) are arranged on the surface of the ship body (101), and symmetrically arranged limit rods (309) are fixed inside the limit seats (308). A sliding seat (310) slides between the two groups of limit rods (309), and a connecting rod (311) is fixed on one side of the sliding seat (310), and the other end of the connecting rod (311) is fixed to the bottom of the second platform (103).

6. The wave vertical motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 1, characterized in that: The wave-compensating embarkation and disembarkation ladder (104) is provided with a guide mechanism (4) which facilitates the disassembly, assembly, inspection and maintenance of the laser distance measuring sensor (312).

7. The wave vertical motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 6, characterized in that: The guide mechanism (4) comprises a rectangular groove (401) provided on the lower surface of the wave-compensating embarkation and disembarkation ladder (104), straight rods (402) arranged symmetrically inside the rectangular groove (401), and sliders (403) arranged on two groups of the straight rods (402); The sliding block (403) slides on the two groups of straight rods (402) via sliding sleeves; The two groups of straight rods (402) are designed to be inclined downward from left to right, and a rectangular hole (407) is provided on the surface of the wave compensation boarding and disembarking ladder (104) on one side close to the second platform (103).

8. The wave vertical motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 7, characterized in that: A buffer plate (404) is arranged between the two ends of the two groups of straight rods (402), and springs (406) are wound around the two ends of the straight rods (402).

9. The wave vertical motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 8, characterized in that: A first electromagnet (405) is provided on a group of buffer plates (404) away from the second platform (103).

10. The wave vertical motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 1, characterized in that: A support mechanism (5) capable of supporting the second platform (103) is installed on the ship body (101), and the support mechanism (5) comprises a support seat (501) fixed on the surface of the ship body (101), a top plate (502) sliding inside the support seat (501), and metal sheets (503) fixed on both sides of the top plate (502); The two sides of the support seat (501) are fixed with symmetrically arranged fixing ears (504), and the second electromagnet (505) is installed on the side where the two groups of fixing ears (504) are close to each other. The metal sheet (503) is made of iron material.

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