Offshore floating crane device with wave compensation mechanism

Abstract

The invention discloses an offshore floating crane device with a wave compensation mechanism, and relates to the related field of offshore floating cranes. Six groups of hydraulic push rods are rotatably arranged at the top position of the fixed base at equal angles relative to the center position of the fixed base, the top positions of the hydraulic push rods are rotatably arranged at the edge of the bottom of the bearing table, and the bottom of the stand column is fixed to the center of the top of the bearing table; the output end of the driving motor is fixed to the end, extending into the stand column, of the bottom end of the fixing table. According to the offshore floating crane device with the wave compensation mechanism, the deep compensation mechanism is arranged, the swing motor drives the suspension arm body to swing through the spline shaft, seawater goods can be conveniently hoisted by the lifting hook assembly, and therefore hoisting work of the lifting hook assembly is more convenient; in addition, the knocking mechanism is arranged, so that rust on the outer side of the suspension arm body can be cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field related to offshore floating cranes, and in particular to an offshore floating crane device with a wave compensation mechanism. Background Art

[0002] Floating crane is a kind of water lifting equipment used for fixed-point construction in waterways or near-shore waters, such as installation of offshore bridges, lifting of large pieces of offshore oil platforms, salvage of sunken ships, etc.

[0003] The existing offshore floating crane has certain shortcomings when in use. When working, the offshore floating crane is easily swung by the impact of waves.

[0004] In order to overcome the above-mentioned defects, reference may be made to a wave compensation device for an offshore floating crane disclosed in the prior art (Chinese patent with application number CN201811386340.7 and publication date 2020-05-08). In the wave compensation device, when the rotating motor drives the workbench to rotate, the annular slider 1 and the annular slider 2 on the lower surface of the workbench can respectively rotate in the corresponding annular groove 1 and the annular groove 2, and the fan-shaped slider 1 and the fan-shaped slider 2 on the lower surface of the workbench can respectively rotate in the corresponding fan-shaped groove 1 and the fan-shaped groove 2, thereby supporting the workbench and ensuring the stability of the workbench during rotation.

[0005] In addition, reference may be made to a wave compensation device disclosed in the prior art (Chinese patent with application number CN202223336652.1 and publication date 2023-05-12). The wave compensation device can provide active compensation for wave fluctuations during underwater operations, improve the physical sensation of personnel in the diving chamber, has a simple structure and low cost.

[0006] And reference can be made to the prior art (Chinese patent application number CN201310182774.6, published on April 1, 2015) for a wave compensation device for an ocean crane, which has the functions of passive wave compensation and constant tension compensation, reduces the influence of the heave motion caused by waves on the crane and the hoisted object, and increases the safety of the ocean crane hoisting;

[0007] Although the above device can effectively compensate for the occurrence of waves during operation, there are still other problems during the operation. First, when waves hit the hull, the lifting device needs to ensure not only sway compensation and longitudinal compensation, but also depth compensation, so as to more stably ensure the stability of the offshore lifting device.

[0008] Therefore, we propose an offshore floating crane device with a wave compensation mechanism to solve the above-mentioned problems. Summary of the invention

[0009] The purpose of the present invention is to provide an offshore floating crane device with a wave compensation mechanism to solve the problem raised in the above background technology that when the waves of the offshore floating crane devices currently on the market hit the hull, the lifting device must first perform compensation, not only to ensure lateral compensation and longitudinal compensation, but also to perform deep compensation, thereby more stably ensuring the stability of the offshore lifting device.

[0010] To achieve the above object, the present invention provides the following technical solution: an offshore floating crane device with a wave compensation mechanism, comprising a fixed base installed at the bow position, and a bearing platform is also arranged above the fixed base;

[0011] It also includes: six groups of hydraulic push rods are arranged at equal angles at the top position of the fixed base and the center position of the fixed base, the top position of the hydraulic push rods is arranged at the bottom edge of the bearing platform, a hydraulic delivery assembly is fixed at the top center position of the fixed base, and the output end position of the hydraulic delivery assembly is connected to the oil chamber of the hydraulic push rod through a first delivery pipe;

[0012] A driving motor is installed at the center of the bottom of the bearing platform, and the output end of the driving motor extends into the interior of the column, and a fixed platform is rotatably arranged on the top of the column, the bottom of the column is fixed at the center of the top of the bearing platform, and the output end of the driving motor is fixed to one end of the bottom of the fixed platform that extends into the interior of the column;

[0013] Two groups of fixing frames are fixed at the top edge of the fixing platform, and a rotating motor is installed at the side position of one group of the fixing frames. The driving of the rotating motor realizes the operation of the depth compensation mechanism and the knocking mechanism. The action end of the depth compensation mechanism is realized on one side of the boom body, and a height-adjustable hook assembly is installed at the bottom position of the right end of the boom body.

[0014] Preferably, the left end of the boom body is rotatably arranged on one side of the fixed platform, and the output end of the swing motor is rotatably connected to the left end of the boom body through a spline shaft. The swing motor realizes height and angle adjustment of the left end of the boom body through the spline shaft.

[0015] Preferably, the depth compensation mechanism includes a worm gear with a fixed position at the output end of the rotating motor, and both ends of the worm gear are rotatably arranged on the inner side of two sets of fixed frames, one end of the worm gear away from the rotating motor is fixed at the center position of the rotating gear, and the oblique upper position of the rotating gear is meshed and connected to the bottom of the connecting gear, and the center of the connecting gear is fixed at the end of the cable drum, and a cable body is wrapped around the outer side of the cable drum, and a first hook is fixed to the outer end of the cable body, and the outer side of the first hook is engaged and arranged on the inner side of the fixed hook, thereby achieving more stable operation of the hook assembly.

[0016] Preferably, one side of the fixing hook is threadedly connected to the side position of the boom body, the rotating gear and the connecting gear are both rotatably set on the outer side of the fixing frame, the diameter of the rotating gear is larger than the diameter of the connecting gear, and both ends of the cable drum are rotatably set on the inner side of the two sets of fixing frames, and the cable drum drives the cable body to be retracted and released through the meshing connection of the rotating gear and the connecting gear.

[0017] Preferably, the hook assembly includes a hook for lifting objects, and the hook assembly also includes a winch for driving the hook position, and the top of the winch is fixed to the bottom of the right end of the boom body, so that the hook assembly can work stably at sea.

[0018] Preferably, a worm wheel is meshingly connected to the bottom of the worm, the center of the worm wheel is fixed to the side end of the reciprocating screw, the outer side of the reciprocating screw is rotatably set to the inside of a closed oil chamber, a square oil push plate is slidably set inside the closed oil chamber, the inner side of the oil push plate is threadedly connected to the outer side of the reciprocating screw, two groups of second delivery pipes are connected to the end of the closed oil chamber away from the worm wheel, and a knocking mechanism is implemented on the outer side of the second delivery pipe to knock and remove rust on the outer side of the boom body, thereby realizing the operation of the knocking mechanism during the second delivery pipe conveying hydraulic oil.

[0019] Preferably, hydraulic oil is provided inside the closed oil chamber, a rubber ring is nested on the outside of the oil pushing plate, and the outside of the rubber ring is attached to the inner wall of the closed oil chamber, the hydraulic oil corresponds to one side of the second delivery pipe, and the hydraulic oil can be delivered inside the second delivery pipe by pushing the oil pushing plate.

[0020] Preferably, the knocking mechanism includes a accommodating tube connected to the other end of the second conveying tube, and two groups of extension tubes are slidably arranged inside the accommodating tube. The two groups of extension tubes are connected by a reset spring, and the outer end of the extension tube is rotatably arranged at one end of the knocking block. The middle position of the knocking block is rotated on the inner side of the fixed shaft, and the bottom of the fixed shaft is fixed on the outer side of the arm body. The setting of the driving mechanism can realize the knocking block to perform knocking work on the outer side of the arm body.

[0021] Preferably, a piston is provided at one end of the extension tube arranged inside the accommodating tube, and the outer wall of the piston is in contact with the inner wall of the accommodating tube. The hydraulic oil transported by the second delivery pipe to the extension tube forms a back-and-forth sliding mechanism, thereby enabling the extension tube arranged inside the accommodating tube to move relative to each other, thereby allowing the two sets of knocking mechanisms to remove rust from the outer side of the boom body.

[0022] Preferably, the knocking block is in a "Z" shape, and the end of the knocking block away from the extension tube is fitted on the outside of the boom body, and the knocking mechanism has two groups symmetrically distributed about the transverse center line of the boom body. The knocking block forms a rotating structure between the extension tube and the fixed shaft, so that the rotation of the knocking block can realize the knocking and rust removal work.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the offshore floating crane device with a wave compensation mechanism is provided with a deep compensation mechanism, and the swing motor drives the boom body to swing through the spline shaft, so that the hook assembly can conveniently lift the seawater cargo, and the output end of the rotating motor drives the worm to rotate, so that the cable body can be retracted and released, and then the first hook and the fixed hook can assist the boom body, so that the hook assembly can be more convenient for lifting work, and the knocking mechanism provided can realize the cleaning of the rust on the outside of the boom body, and the specific contents are as follows:

[0024] 1. A hydraulic push rod is set up. Through the setting of six groups of hydraulic push rods with different ranges, compensation work can be carried out on the bearing platform in six different dimensions, which can make the bearing platform in a stable state, and then achieve lateral and longitudinal compensation work;

[0025] Furthermore, a boom body is provided, and the adjustment of the boom body is achieved through the matching arrangement of the output end of the swing motor and the spline shaft, which can ensure the stability of the hook assembly;

[0026] Furthermore, a deep sinking compensation mechanism is provided, which drives the worm to rotate by rotating the output end of the rotating motor, so as to realize the retraction and extension of the cable body, and then the first hook and the fixed hook can assist the boom body, so as to perform deep sinking compensation work on the hook assembly;

[0027] 2. A knocking mechanism is provided, and through the meshing connection between the worm gear and the rotating gear, the hydraulic oil inside the closed oil chamber is extruded and transported to the inside of the second delivery pipe by the oil push plate, which can ensure that the hydraulic oil is transported to the inside of the accommodating tube, ensure that the extension tube is extended and drive the knocking block to perform knocking work through the fixed shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0029] Figure 2 It is a side view structural schematic diagram of the present invention;

[0030] Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0031] Figure 4 This is a schematic diagram of the main structure of the hydraulic delivery assembly of the present invention;

[0032] Figure 5 It is a schematic diagram of the side view structure of the boom of the present invention;

[0033] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0034] Figure 7 It is a schematic diagram of the side view structure of the closed oil chamber of the present invention;

[0035] Figure 8 This is a schematic diagram of the closed oil chamber structure from above of the present invention;

[0036] Fig. 9 It is a schematic diagram of the side structure of the knocking block of the present invention;

[0037] Fig.10 It is a bottom view of the structure of the containing tube of the present invention.

[0038] In the figure: 1. fixed base; 2. hydraulic push rod; 3. bearing platform; 4. hydraulic conveying assembly; 5. first conveying pipe; 6. driving motor; 7. column; 8. fixed platform; 9. fixed frame; 10. rotating motor; 11. worm; 12. rotating gear; 13. connecting gear; 14. cable drum; 15. cable body; 16. first hook; 17. fixed hook; 18. boom body; 19. swing motor; 20. hook assembly; 21. worm gear; 22. closed oil chamber; 23. reciprocating screw; 24. oil push plate; 25. second conveying pipe; 26. accommodating tube; 27. extension tube; 28. reset spring; 29. ​​knocking block; 30. fixed shaft. DETAILED DESCRIPTION

[0039] 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.

[0040] See also Figure 1-Figure 10 , the present invention provides the following technical solutions:

[0041] Embodiment 1: In order to solve the problem that when the waves of the offshore floating crane device on the market hit the hull, first of all, during the compensation process of the lifting device, not only the sway compensation and the sway compensation need to be ensured, but also the deep compensation needs to be performed, so as to more stably ensure the stability of the offshore lifting device. Figure 1 -Attached Figure 4 The deep compensation mechanism includes a worm 11 with a fixed output end of the rotating motor 10, and both ends of the worm 11 are rotatably arranged on the inner side of the two sets of fixed frames 9, and one end of the worm 11 away from the rotating motor 10 is fixed at the center of the rotating gear 12, and the oblique upper position of the rotating gear 12 is meshed and connected to the bottom of the connecting gear 13, and the center of the connecting gear 13 is fixed to the end of the cable drum 14, and the outer side of the cable drum 14 is wound with a cable body 15, and the outer end of the cable body 15 is fixed with a first hook 16, and the outer side of the first hook 16 is engaged and arranged on the inner side of the fixed hook 17. One side of the fixed hook 17 is threadedly connected to the side position of the boom body 18, and the rotating gear 12 and the connecting gear 13 are both rotatably arranged on the outer side of the fixed frame 9, and the diameter of the rotating gear 12 is larger than the diameter of the connecting gear 13, and the two ends of the cable drum 14 are both rotatably arranged on the inner side of the two sets of fixed frames 9. The hook assembly 20 includes a hook for lifting objects, and the hook assembly 20 also includes a winch for driving the hook position, and the top of the winch is fixed to the bottom of the right end of the boom body 18.

[0042] When the waves hit the hull, in order to facilitate the wave compensation work, the hydraulic oil in the hydraulic delivery component 4 can be delivered and recovered to the independent first delivery pipe 5 through the operation of the sensor, and six groups of hydraulic push rods 2 in different directions are set. Through the coordination of six dimensions, the bearing platform 3 is compensated in different directions, so as to achieve the lateral and longitudinal compensation of the hook component 20 set at the right end of the boom body 18. At this time, the stability of the column 7 set at the top center of the bearing platform 3 can be guaranteed, and the hook component 20 also needs to be compensated for the depth. By starting the swing motor 19 and the rotating motor 10 set on one side of the fixed platform 8, the swing motor 19 is started, so that the swing motor 19 drives the boom The main body 18 rotates around the spline shaft as the center of the circle. In addition, the rotation of the rotating motor 10 can realize the rotation of the worm 11 inside the two sets of fixed frames 9. At this time, the rotating gear 12 fixed on the outside of the worm 11 will also rotate. At this time, the connecting gear 13 meshing and connected at the oblique upper position of the rotating gear 12 will also rotate. However, the connecting gear 13 drives the cable drum 14 to rotate during operation, and the cable body 15 wound on the outside of the cable drum 14 can be retracted and released. The first hook 16 set at one end of the cable body 15 will also drive the boom body 18 to rotate through the fixed hook 17, so that the hook assembly 20 set at the right end of the boom body 18 can perform deep compensation.

[0043] Embodiment 2: In order to perform rust removal work during work, please refer to the attached Figure 1 , Attachment Figure 2 and attached Figure 5 -Attached Fig.10 The bottom of the worm 11 is meshed with a worm wheel 21, the center of which is fixed at the side end of the reciprocating screw 23, the outer side of the reciprocating screw 23 is rotated to the inside of the closed oil chamber 22, a square oil push plate 24 is slidably arranged inside the closed oil chamber 22, the inner side of the oil push plate 24 is threadedly connected to the outer side of the reciprocating screw 23, and the closed oil chamber 22 is connected to one end away from the worm wheel 21 with two sets of second delivery pipes 25, and the outer side of the second delivery pipe 25 realizes a knocking mechanism to knock and remove rust on the outer side of the boom body 18. Hydraulic oil is arranged inside the closed oil chamber 22, a rubber ring is nested on the outer side of the oil push plate 24, and the outer side of the rubber ring is attached to the inner wall of the closed oil chamber 22, and the hydraulic oil corresponds to one side of the second delivery pipe 25. The knocking mechanism includes a receiving tube 26 connected to the other end of the second delivery tube 25, two groups of extension tubes 27 are slidably arranged inside the receiving tube 26, and the two groups of extension tubes 27 are connected by a return spring 28. The outer end of the extension tube 27 is rotatably arranged at one end of a knocking block 29, and the middle position of the knocking block 29 is rotated inside the fixed shaft 30, and the bottom of the fixed shaft 30 is fixed to the outer position of the boom body 18. A piston is arranged at one end of the extension tube 27 arranged inside the receiving tube 26, and the outer wall of the piston is attached to the inner wall of the receiving tube 26. The extension tube 27 forms a back-and-forth sliding mechanism through the hydraulic oil delivered by the second delivery tube 25. The knocking block 29 is in a "Z" shape, and the end of the knocking block 29 away from the extension tube 27 is attached to the outer side of the boom body 18. The knocking mechanism is symmetrically distributed with respect to the transverse center line of the boom body 18. The knocking block 29 forms a rotating structure between the extension tube 27 and the fixed shaft 30.

[0044] During the process of deep compensation, the worm 11 rotates, and the worm wheel 21 meshed with the outer bottom position of the worm 11 also rotates. The center of the worm wheel 21 is fixed to the outer end of the reciprocating screw 23, so that the reciprocating screw 23 can rotate at the outer position of the closed oil chamber 22. At this time, the push plate 24 threadedly connected to the outer side of the reciprocating screw 23 can move inside the closed oil chamber 22. At this time, the hydraulic oil in the closed oil chamber 22 will be transported, and the hydraulic oil can be transported through the second delivery The tube 25 is transported to the middle part of the accommodating tube 26. At this time, the extension tubes 27 slidably arranged at both ends inside the accommodating tube 26 slide relatively through the piston, and the hydraulic push rod 2 arranged between the two groups of extension tubes 27 will also be deformed. At this time, the extension tube 27 can drive the rotatably connected knocking block 29 to rotate around the axial end position of the fixed axis 30 during the movement, so that the knocking block 29 can knock on the outer side of the boom body 18 away from the end of the extension tube 27, so as to remove the rust on the boom body 18.

[0045] Embodiment three:

[0046] In order to facilitate the lifting work, please refer to the attached Figure 1 -Attached Figure 5 , including a fixed base 1 installed at the bow position, and a bearing platform 3 is also arranged above the fixed base 1; it also includes: six groups of hydraulic push rods 2 are arranged at the top position of the fixed base 1 to rotate at equal angles about the center position of the fixed base 1, the top position of the hydraulic push rods 2 is rotated and arranged at the bottom edge of the bearing platform 3, a hydraulic delivery component 4 is fixed at the top center position of the fixed base 1, and the output end position of the hydraulic delivery component 4 is connected to the oil chamber of the hydraulic push rod 2 through a first delivery pipe 5; a driving motor 6 is installed at the bottom center position of the bearing platform 3, and the output end of the driving motor 6 extends into the vertical The interior of the column 7, and the top of the column 7 is rotatably provided with a fixed platform 8, the bottom of the column 7 is fixed at the top center of the load-bearing platform 3, and the output end of the driving motor 6 is fixed at the bottom end of the fixed platform 8 and extends into one end of the column 7; two groups of fixed frames 9 are fixed at the top edge of the fixed platform 8, and a rotating motor 10 is installed at the side position of one group of fixed frames 9. The driving of the rotating motor 10 realizes the operation of the deep compensation mechanism and the knocking mechanism. The action end of the deep compensation mechanism is realized on one side of the boom body 18, and a height-adjustable hook assembly 20 is installed at the bottom position of the right end of the boom body 18. The left end position of the boom body 18 is rotatably provided on one side of the fixed platform 8, and the output end position of the swing motor 19 is rotatably connected with the left end position of the boom body 18 through a spline shaft. When using this device, by starting the driving motor 6, the fixed platform 8 can be driven to rotate at the top position of the column 7. At this time, the fixed platform 8 and the boom body 18 will be rotated and lifted at the bow position. In addition, the winch and hook set by the hook assembly 20 can be used to lift the cargo.

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An offshore floating crane device with a wave compensation mechanism, comprising a fixed base (1) installed at the bow of a ship, and a bearing platform (3) is also arranged above the fixed base (1); It is characterized in that Also includes: Six groups of hydraulic push rods (2) are arranged at equal angles on the top of the fixed base (1) and are rotatable about the center of the fixed base (1); the top of the hydraulic push rods (2) are rotatably arranged at the bottom edge of the bearing platform (3); a hydraulic delivery assembly (4) is fixed at the center of the top of the fixed base (1); the output end of the hydraulic delivery assembly (4) is connected to the oil chamber of the hydraulic push rod (2) via a first delivery pipe (5); A driving motor (6) is installed at the center of the bottom of the supporting platform (3), the output end of the driving motor (6) extends into the interior of the column (7), and a fixing platform (8) is rotatably arranged at the top of the column (7), the bottom of the column (7) is fixed at the center of the top of the supporting platform (3), and the output end of the driving motor (6) is fixed to one end of the bottom of the fixing platform (8) extending into the interior of the column (7); Two groups of fixing frames (9) are fixed at the top edge of the fixing platform (8), and a rotating motor (10) is installed at the side position of one group of the fixing frames (9). The driving of the rotating motor (10) realizes the operation of the depth compensation mechanism and the knocking mechanism. The action end of the depth compensation mechanism is realized on a side of the boom body (18), and a height-adjustable hook assembly (20) is installed at the bottom position of the right end of the boom body (18).

2. The offshore floating crane device with a wave compensation mechanism according to claim 1, characterized in that: The left end of the boom body (18) is rotatably arranged on one side of the fixed platform (8), and the output end of the swing motor (19) is rotatably connected to the left end of the boom body (18) via a spline shaft.

3. The offshore floating crane device with a wave compensation mechanism according to claim 1, characterized in that: The depth compensation mechanism comprises a worm (11) whose output end is fixed at a rotating motor (10), and both ends of the worm (11) are rotatably arranged on the inner side of two sets of fixed frames (9), one end of the worm (11) away from the rotating motor (10) is fixed at the center of a rotating gear (12), the upper oblique position of the rotating gear (12) is meshedly connected to the bottom of a connecting gear (13), the center of the connecting gear (13) is fixed to the end of a cable drum (14), a cable body (15) is wound around the outer side of the cable drum (14), a first hook (16) is fixed to the outer end of the cable body (15), and the outer side of the first hook (16) is engaged with the inner side of a fixing hook (17).

4. The offshore floating crane device with a wave compensation mechanism according to claim 3, characterized in that: One side of the fixing hook (17) is threadedly connected to a side position of the boom body (18); the rotating gear (12) and the connecting gear (13) are both rotatably arranged at an outer position of the fixing frame (9); the diameter of the rotating gear (12) is larger than the diameter of the connecting gear (13); and both ends of the cable drum (14) are both rotatably arranged at the inner side of the two sets of fixing frames (9).

5. The offshore floating crane device with a wave compensation mechanism according to claim 3, characterized in that: The hook assembly (20) comprises a hook for lifting an object, and the hook assembly (20) further comprises a hoist for driving the hook position, wherein the top of the hoist is fixed to the bottom of the right end of the boom body (18).

6. The offshore floating crane device with a wave compensation mechanism according to claim 3, characterized in that: The bottom of the worm (11) is meshedly connected with a worm wheel (21), the center of which is fixed to the side end of the reciprocating screw (23), the outer side of the reciprocating screw (23) is rotatably arranged inside the closed oil chamber (22), a square oil push plate (24) is slidably arranged inside the closed oil chamber (22), the inner side of the oil push plate (24) is threadedly connected to the outer side of the reciprocating screw (23), and two groups of second delivery pipes (25) are connected to one end of the closed oil chamber (22) away from the worm wheel (21), and the outer side of the second delivery pipe (25) realizes a knocking mechanism to knock and remove rust on the outer side of the boom body (18).

7. The offshore floating crane device with a wave compensation mechanism according to claim 6, characterized in that: Hydraulic oil is arranged inside the sealed oil chamber (22), a rubber ring is embedded on the outside of the oil push plate (24), and the outside of the rubber ring is attached to the inner wall of the sealed oil chamber (22), and the hydraulic oil corresponds to one side of the second delivery pipe (25).

8. The offshore floating crane device with a wave compensation mechanism according to claim 1, characterized in that: The knocking mechanism comprises a receiving tube (26) connected to the other end of the second conveying tube (25); two groups of extension tubes (27) are slidably arranged inside the receiving tube (26); the two groups of extension tubes (27) are connected via a return spring (28); the outer end of the extension tube (27) is rotatably arranged on one end of a knocking block (29); the middle position of the knocking block (29) is rotatably arranged on the inner side of a fixed shaft (30); and the bottom of the fixed shaft (30) is fixed on the outer side of the boom body (18).

9. The offshore floating crane device with a wave compensation mechanism according to claim 8, characterized in that: The extension tube (27) is provided with a piston at one end thereof which is arranged inside the accommodation tube (26), and the outer wall of the piston is fitted to the inner wall of the accommodation tube (26). The extension tube (27) forms a reciprocating sliding mechanism through the hydraulic oil delivered by the second delivery tube (25).

10. The offshore floating crane device with a wave compensation mechanism according to claim 8, characterized in that: The knocking block (29) is in a "Z" shape, and one end of the knocking block (29) away from the extension tube (27) is arranged in close contact with the outside of the boom body (18). The knocking mechanism has two groups symmetrically distributed about the transverse center line of the boom body (18). The knocking block (29) forms a rotating structure through the extension tube (27) and the fixed shaft (30).

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