Offshore wind turbine installation equipment

Abstract

According to the offshore wind turbine installation equipment provided by the utility model, the offshore wind turbine installation equipment is improved, so that'ship-crane separation 'is realized, not only is the adaptability of sea area working conditions improved, but also the cost of wind turbine installation construction is reduced. In order to achieve the purpose, the offshore wind turbine installation equipment comprises a guide pipe frame, a truss structure and a crane assembly, a lifting channel is defined by the guide pipe frame, the lifting channel extends in the height direction of the offshore wind turbine installation equipment, the truss structure is inserted into the lifting channel, and the crane assembly is arranged on the truss structure. And the truss structure can move up and down in the height direction along the lifting channel, and the top end of the truss structure is located on the outer side of the lifting channel and connected with the crane assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power installation, and in particular to offshore wind turbine installation equipment. Background Art

[0002] With the growing global demand for renewable energy, offshore wind power, as a key component of clean energy, is gaining increasing attention for its development and utilization. However, the rapid development of the offshore wind power industry is accompanied by a growing demand for marine resources across various industries, and awareness of marine ecological and environmental protection is also gradually increasing. Against this backdrop, offshore wind power development in nearshore waters faces multiple challenges, including limited space and ecological sensitivity, limiting the overall development potential of offshore wind power. Therefore, the trend for offshore wind power development in my country to expand further into the deep sea is becoming inevitable, expanding development space and minimizing the impact on the nearshore ecological environment.

[0003] Static-to-static installation technology is a key step in offshore wind turbine installation. Traditional deepwater static-to-static installation solutions rely primarily on jack-up installation vessels, which lift the turbines by hoisting the vessel. However, with the advancement of grid parity for offshore wind power, controlling offshore wind turbine installation costs has become increasingly important. On the one hand, grid parity requires reducing the overall cost of wind power projects, including installation costs. On the other hand, as offshore wind farms expand to deeper and more remote waters, the construction costs of jack-up platforms have increased significantly, further exacerbating the pressure to control costs.

[0004] Therefore, developing a new generation of wind turbine installation equipment to replace traditional self-elevating wind turbine installation vessels and reduce the cost of wind turbine installation construction has become a technical issue that needs to be urgently addressed in the current offshore wind power field. Utility Model Content

[0005] The purpose of the utility model is to provide an offshore wind turbine installation device. By improving the offshore wind turbine installation equipment, "ship crane separation" is achieved, which not only improves the adaptability to sea working conditions, but also reduces the cost of wind turbine installation and construction.

[0006] To achieve the above-mentioned purpose, the present invention provides an offshore wind turbine installation device, which includes a conductor pipe, a truss structure and a crane assembly. The conductor pipe forms a lifting channel, and the lifting channel extends along the height direction of the offshore wind turbine installation device. The truss structure is inserted into the lifting channel and can move up and down in the height direction along the lifting channel. The top of the truss structure is located on the outside of the lifting channel and is connected to the crane assembly.

[0007] During the installation of an offshore wind turbine, the installation equipment is transported to the site via a transport vessel. After being launched into the water by a floating crane, the jacket is used to seat the installation equipment. Once seated, the truss structure is moved up and down to transport the crane assembly to the desired height for installation of the offshore wind turbine. This "ship-crane separation" approach not only improves adaptability to offshore working conditions but also reduces the cost of wind turbine installation. Furthermore, the installation equipment described in this application can also improve adaptability to increasing wind turbine hub heights.

[0008] Optionally, a plurality of racks are provided on the truss structure, and the plurality of racks are arranged around the truss structure or symmetrically relative to the center line of the truss structure; the lifting channel is adapted to be equipped with a lifting device, and the lifting device includes a power source and a plurality of gear sets connected to the power source in a transmission manner, and each gear set is meshed with the rack one by one.

[0009] In this embodiment, a lifting mechanism is installed within the lifting channel and engages with the truss structure, enabling the truss structure to move up and down in the height direction of the installed equipment while also stopping at the set lifting height. By providing the truss structure with a number of racks, arranged around the truss structure or symmetrically distributed about its centerline, structural stability and uniform transmission are achieved.

[0010] Optionally, the conductor frame and the truss structure both have a centerline extending in the height direction, and the centerline of the truss structure coincides with the centerline of the conductor frame. This technical solution adopts a concentric arrangement of the truss structure and the conductor frame. Compared with the eccentric arrangement of the truss structure and the conductor frame, the concentric arrangement can effectively disperse and balance the force, reduce the structural stress concentration phenomenon caused by eccentricity, and thus improve the stability and durability of the overall structure; in addition, the concentric layout makes the space distribution between the truss and the conductor frame more uniform, avoids the space waste that may occur in the eccentric arrangement, and improves the effective utilization of space; thirdly, due to the symmetry of the structure and the center alignment, the positioning during the installation process is more accurate, reducing installation errors. At the same time, in subsequent maintenance work, the concentric arrangement layout makes inspection and maintenance more intuitive and convenient, and the concentric arrangement helps to reduce the vibration and dynamic imbalance caused by eccentricity, thereby improving the dynamic performance of the entire system, especially when subjected to different lifting loads, showing better stability and response speed.

[0011] Optionally, the jacket includes a plurality of legs, each of which extends in a height direction and is inclined in the height direction. In this embodiment, the top ends of the legs are inclined toward each other in the height direction, thereby increasing the stability of the jacket bottom during the installation process, thereby further increasing the lifting load of the installation equipment in this solution.

[0012] Optionally, the offshore wind turbine installation apparatus further includes an anti-sinking plate extending horizontally and connected to the bottoms of at least two of the legs. The anti-sinking plate disposed on the bottom of the jacket increases the contact area between the jacket and the seabed when the jacket is subjected to vertical loads, thereby ensuring sufficient bottom-seat stability for the jacket during construction.

[0013] Optionally, a connecting rod group is provided between each of the two adjacent legs, and each connecting rod group includes two connecting rods, and the two ends of the two connecting rods in the same connecting rod group are fixedly connected to the legs on the corresponding side, and the middle parts of the two connecting rods overlap and are fixed. In this way, each connecting rod group contains two connecting rods, and the two ends of the two connecting rods are respectively firmly connected to the legs on the corresponding sides, forming a stable triangular support structure. This design not only effectively disperses the vertical and horizontal loads during crane operation, but also significantly improves the anti-overturning ability of the installation equipment. In addition, the two connecting rods of the same connecting rod group overlap and are fixed in the middle. This design not only simplifies the installation and connection process of the connecting rod group, but also further enhances the rigidity and stability of the connecting rod group itself.

[0014] Optionally, the crane assembly includes a boom, and the boom is capable of rotating relative to the truss structure on a first rotation plane, where the first rotation plane is a plane where the height direction is located;

[0015] An arm rest is provided at the top of the jacket, extending outward from the side where the jacket is located and located within the first rotation plane of the boom. In this embodiment, the boom is capable of rotating within the first rotation plane and the second rotation plane, the first rotation plane and the second rotation plane being perpendicular to each other, the second rotation plane coinciding with the horizontal plane, and the first rotation plane being in a vertical position and coinciding with the vertical plane. The arm rest is provided within the second rotation plane, so that when the boom moves toward the side closer to the jacket, it can abut against the arm rest, thereby avoiding support and limitation of the boom during the process of moving and installing the equipment, thereby preventing damage to the boom.

[0016] Optionally, the crane assembly further includes a base connected to the top of the truss structure and a counterweight arm connected to the base, wherein the counterweight arm and the crane arm are arranged relative to each other in the horizontal direction.

[0017] By setting up a counterweight arm, the truss structure can be minimized from being subjected to excessive bending moments when the crane is empty-hooked and during the lifting process.

[0018] Optionally, the counterweight arm includes a first arm segment having one end rotatably connected to the base, the other end of the first arm segment is hinged to one end of the second arm segment, and the other end of the second arm segment is used to lift the counterweight; the offshore wind turbine installation equipment also includes a driving hydraulic component, one of the cylinder and the piston of the driving hydraulic component is connected to the base, and the other is connected to the second arm segment to push the second arm segment outward or pull back.

[0019] By adopting the counterweight arm structure in this embodiment, the first arm section, the second arm section and the driving hydraulic parts form a triangular structure, and the distance between the counterweight and the center of the crane is changed by the extension and contraction of the hydraulic push rod. The counterweight is a structure of stacked weights, composed of multiple super-lifting counterweight blocks, thereby balancing the center of gravity of the crane.

[0020] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0022] Figure 1 It is a structural diagram of the installation equipment in the embodiment of the utility model, working state;

[0023] Figure 2 It is a structural diagram of the installation device in the embodiment of the utility model, in the storage state;

[0024] Figure 3 This is a method for using the installation device in an embodiment of the present utility model, showing step 1;

[0025] Figure 4 This is a method for using the installation device in an embodiment of the present utility model, showing part of step 2;

[0026] Figure 5 This is a method for using the installation device in an embodiment of the present utility model, showing step 6.

[0027] Reference numerals:

[0028] 10-Installation equipment; 1-Jacket; 11-Support leg; 111-Base section; 12-Support frame; 13-Anti-sinking plate; 14-Connecting rod group; 141-Connecting rod; 15-Boom rest frame; 2-Truss structure; 21-Side edge bar; 3-Crane assembly; 31-Base; 32-Boom; 33-Counterweight arm; 331-First boom section; 332-Second boom section; 333-Drive hydraulic components; 334-Counterweight; 4-Lifting device; 5-Transport ship; 6-Floating crane; P1-First rotation plane; P2-Second rotation plane. DETAILED DESCRIPTION

[0029] The utility model provides an offshore wind turbine installation device, which realizes "ship-crane separation" by improving the offshore wind turbine installation device, which not only improves the adaptability to sea working conditions, but also reduces the cost of wind turbine installation and construction.

[0030] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0031] Relational terms such as “first” and “second” are used merely to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0032] Please refer to Figure 1 and Figure 2 , Figure 1 It is a structural diagram of the installation equipment in the embodiment of the utility model, working state; Figure 2 It is a structural diagram of the installation device in the embodiment of the utility model, in the storage state; Figure 3 This is a method for using the installation device in an embodiment of the present utility model, showing step 1; Figure 4 This is a method for using the installation device in an embodiment of the present utility model, showing part of step 2; Figure 5 This is a method for using the installation device in an embodiment of the present utility model, showing step 6.

[0033] As shown in the figure, in order to achieve the above-mentioned purpose, the present invention provides an offshore wind turbine installation device 10, which includes a jacket 1, a truss structure 2 and a crane assembly 3. The jacket 1 forms a lifting channel, and the lifting channel extends along the height direction (Y direction) of the offshore wind turbine installation device 10. The truss structure 2 is inserted into the lifting channel and can move up and down in the Y direction along the lifting channel. The top end of the truss structure 2 is located outside the lifting channel and is connected to the crane assembly 3.

[0034] In this embodiment, during the downward movement of the truss structure 2 , most of the structure can be retracted into the jacket 1 , thereby facilitating the transportation of the structure installation equipment 10 .

[0035] Specifically, a lifting device 4 is installed in the lifting channel. The lifting device 4 includes a power source and several gear sets that are transmission-connected to the power source. Several racks are provided on the truss structure 2. The racks are arranged around the truss structure 2 or symmetrically relative to the center line of the truss structure 2. The lifting channel is adapted to be equipped with the lifting device 4, and each gear set is meshed with the rack one by one.

[0036] For example, the truss structure 2 has a triangular cross-section in the horizontal plane. Racks are provided on the side bars 21 at the three vertices of the triangular structure. The racks are welded to the side bars 21, which extend in the Y direction. The racks are arranged at a height that matches the maximum lifting position of the truss structure 2. The lifting device 4 includes a fixed frame fixedly connected to the inner wall of the lifting channel. The fixed frame supports a plurality of gear sets, which mesh with the racks provided on the side bars 21 in a one-to-one manner.

[0037] The number of lifting devices 4 is one or more, and multiple lifting devices 4 are arranged at intervals along the extension direction of the lifting channel, so as to provide better support for the truss structure 2; in the lifting channel, in addition to the lifting device 4, a guide device can also be provided, and the guide device is also provided with a gear set meshing with the rack. The gear set does not form a rotational connection with the power source. The gear set of the guide device only serves to limit and guide the truss structure 2 in the horizontal direction (X direction), thereby preventing the truss structure 2 from deviating in the X direction during the lifting and falling process.

[0038] In this embodiment, a lifting mechanism 4 is installed within the lifting channel and engages with the truss structure 2, enabling the truss structure 2 to move upward and downward in the Y direction of the installation device 10 while also stopping the truss structure 2 at the set hoisting height. By providing a plurality of racks on the truss structure 2, arranged around the truss structure 2 or symmetrically distributed about its centerline, structural stability and transmission uniformity are achieved.

[0039] In some optional embodiments, the catheter frame 1 includes a plurality of legs 11, each leg 11 extending along the Y direction; and, moreover, arranged obliquely along the Y direction. In a specific implementation, the catheter frame 1 includes three legs 11, and the three legs 11 form a triangular columnar structure. Of course, the catheter frame 1 can also include four legs 11, and the four legs 11 are symmetrically arranged in pairs to form a quadrilateral structure. A support frame 12 is provided at the top of the leg 11. The support frame 12 is arranged in a horizontal plane and extends toward the inner side of the leg 11, and forms a lifting channel. The support frame 12 is fixedly connected to the fixed frame of the lifting device 4; of course, a support frame 12 can also be provided in the middle of the leg 11. The position of the support frame 12 matches the setting position of the lifting device 4, and can also match the setting position of the guide device. Several support frames 12 are spaced apart and parallel in the Y direction.

[0040] In this embodiment, in the Y direction, the top ends of the legs 11 are inclined toward each other, thereby increasing the stability of the bottom of the jacket 1 during the installation of the wind turbine by the installation device 10, thereby further improving the lifting load of the installation device 10 in this solution.

[0041] Both the jacket 1 and the truss structure 2 have centerlines extending along the Y-direction. The centerline of the hoistway coincides with the centerline of the jacket 1. In other words, the hoistway is concentrically arranged with the jacket 1, and the centerline of the truss structure 2 coincides with the centerline of the jacket 1. In the aforementioned embodiment, the truss structure 2 is a triangular prism structure, with the centerline of the truss structure 2 passing through the center of the triangle. However, the truss structure 2 may also be a quadrilateral, in which case the centerline of the truss structure 2 passes through the center of the quadrilateral.

[0042] This technical solution adopts a concentric arrangement of the truss structure 2 and the conductor frame 1, which can effectively disperse and balance the forces, reduce the structural stress concentration caused by eccentricity, and thus improve the stability and durability of the overall structure; in addition, the concentric layout makes the space distribution between the truss and the conductor frame 1 more uniform, avoiding the space waste that may occur in the eccentric arrangement and improving the effective utilization of space.

[0043] In the above-described embodiment, the jacket 1 is capable of achieving a bottom-mounted connection with the seabed or an installation platform. In a specific embodiment, the offshore wind turbine installation apparatus 10 further includes an anti-sinking plate 13 extending in the X-direction and connected to the bottoms of at least two legs 11. The arrangement of the anti-sinking plate 13 at the bottom of the jacket 1 increases the contact area between the jacket 1 and the seabed when the jacket 1 is subjected to vertical loads, thereby providing the jacket 1 with sufficient bottom-mounted connection capability.

[0044] The dustproof plate extends along the X direction, and one end thereof is plugged into one of the two adjacent support legs 11 in the X direction, and the other end is plugged into the other support leg 11. The end of the support leg 11 plugged into the anti-sinking plate 13 extends along the Y direction and is parallel to each other. At the same time, the end plugged into the anti-sinking plate 13 is an equal diameter structure.

[0045] In a specific embodiment, the bottom end of the support leg 11 is defined as being provided with a seating section 111, the base section is an equal-diameter structure and extends along the Y direction, a limiting protrusion is provided at the top of the seating section 111, the limiting protrusion protrudes outward from the seating section 111 in the X direction, and an anti-sinking plate 13 is provided on the lower side of the limiting protrusion. During the seating process, the anti-sinking plate 13 gradually moves upward until it forms a limiting fit with the limiting protrusion in the Y direction. At this time, the anti-sinking plate 13 is pressed against the seabed or the installation platform set on the seabed, thereby increasing the contact area between the bottom of the support leg 11 and the seabed or the installation platform set on the seabed, thereby preventing the support leg 11 from further sinking and seating.

[0046] In other embodiments, a connecting rod group 14 is provided between two adjacent legs 11, and each connecting rod group 14 includes two connecting rods 141. The two ends of the two connecting rods 141 in the same connecting rod group 14 are fixedly connected to the legs 11 on the corresponding side, and the middle parts of the two connecting rods 141 overlap and are fixed. In this way, each connecting rod group 14 includes two connecting rods 141, and the two ends of the two connecting rods 141 are respectively firmly connected to the legs 11 on the corresponding side, forming a stable triangular support structure. This design not only effectively disperses the vertical and horizontal loads during crane operation, but also significantly improves the anti-overturning ability of the installation equipment 10. In addition, the two connecting rods 141 of the same connecting rod group 14 overlap and are fixed in the middle. This design not only simplifies the installation and connection process of the connecting rod group 14, but also further enhances the rigidity and stability of the connecting rod group 14 itself.

[0047] In the above embodiment, the crane assembly 3 includes a boom 32 and a base 31 connected to the top of the truss structure 2. The boom 32 can rotate relative to the truss structure 2 on a first rotation plane P1, which is the plane where the Y-axis and the X-axis are located. At the same time, the boom 32 can rotate within a second rotation plane P2, which is the plane where the Z-axis and the X-axis are located. The first rotation plane P1 is perpendicular to the second rotation plane P2.

[0048] Specifically, base 31 is rotatably connected to the top of truss structure 2. Base 31 can rotate within a second rotation plane P2, thereby driving boom 32 connected to base 31 to rotate within the second rotation plane P2. Boom 32 is rotatably connected to base 31, allowing it to rotate within a first rotation plane P1 and switch between a stowed position and an uplifted position. In the stowed position, boom 32 rotates downward toward jacket 1. In the uplifted position, boom 32 rotates away from jacket 1.

[0049] In this embodiment, an arm rest 15 is provided on top of the jacket 1. The arm rest 15 extends outward from the side where the jacket 1 is located and is located within the first rotation plane P1 of the boom 32. In this embodiment, the arm rest 15 is provided within the second rotation plane P2. This allows the boom 32 to abut against the arm rest 15 when it moves toward the jacket 1. This prevents the boom 32 from being supported and limited during the movement of the installation device 10, thereby preventing damage to the boom 32.

[0050] Furthermore, the crane assembly 3 also includes a counterweight arm 33 connected to the base 31, and the counterweight arm 33 is arranged relative to the boom 32 in a horizontal plane. By providing the counterweight arm 33, it is possible to minimize the excessive bending moment borne by the truss structure 2 during the empty hook and hoisting process of the crane. Among them, one counterweight arm 33 can be provided, and more counterweight arms 33 can also be provided. In the example shown in the accompanying drawings, the crane assembly 3 is provided with two counterweight arms 33, and the positions of the farthest ends of the two counterweight arms 33 extending outward in the X direction are different, and the heights of the two counterweight arms 33 in the Y direction are different, so as to improve the adaptability with the boom 32.

[0051] In a specific embodiment, the counterweight arm 33 includes a first arm segment 331, one end of which is rotatably connected to the base 31, the other end of the first arm segment 331 is hinged to one end of the second arm segment 332, and the other end of the second arm segment 332 is used to lift the counterweight 334; the offshore wind turbine installation equipment 10 also includes a driving hydraulic component 333, one of the cylinder and the piston of the driving hydraulic component 333 is connected to the base 31, and the other is connected to the second arm segment 332 to push the second arm segment 332 outward or pull it back.

[0052] By adopting the counterweight arm 33 structure in this embodiment, the first arm section 331, the second arm section 332 and the driving hydraulic component 333 form a triangular structure, and the distance between the counterweight 334 and the center of the crane is changed by the extension and retraction of the hydraulic push rod. The counterweight 334 is a structure of stacked weights, composed of multiple super-lifting counterweights 334 blocks, thereby balancing the center of gravity of the crane.

[0053] The following provides a method for using the installation device 10 in this solution, which includes:

[0054] Step 1: Transport the installation equipment 10 to the installation site. The installation equipment 10 can be transported to the installation site using a transport vessel 5 using dry or wet transport methods. The transport vessel 5 is expected to be approximately 15,000-25,000 tons to ensure sufficient stability during transportation.

[0055] Step 2: Lift the installation equipment 10. The jacket 1 automatically settles to the designated position. This designated position is typically near the wind turbine foundation. In this step, the floating crane 6 can be used to lift the installation equipment. During this process, the truss structure 2 of the installation equipment is largely retracted within the jacket 1, facilitating the lifting of the installation by the floating crane 6.

[0056] Step 3: Lift the truss structure 2 to the set position. According to the needs of the construction, control the lifting device to lift the truss structure 2 to the set height.

[0057] Step 4: Boom 32 moves to the raised position to hoist the wind turbine. Specifically, boom 32 is used to lift the tower, nacelle, hub, and three blades. During the raising process, counterweight arm 33 autonomously adjusts its range to accommodate the appropriate height, facilitating the raising of boom 32.

[0058] Step 5: After the hoisting is completed, the boom 32 moves to the storage position, and the lifting device 4 drives the truss structure 2 to retract into the jacket 1 until the boom 32 contacts the boom rest.

[0059] Step 6: Recover the installation device 10 and transport the installation device 10 to the next set location, and repeat the above steps.

[0060] During the installation of an offshore wind turbine, the installation equipment 10 is transported to the site via a transport vessel 5. After being hoisted into the water by a floating crane 6, the jacket 1 allows the installation equipment 10 to be placed on the bottom. Once placed on the bottom, the truss structure 2 moves up and down to transport the crane assembly 3 to the desired height for installation of the offshore wind turbine. This "ship-crane separation" approach not only improves adaptability to offshore operating conditions but also reduces the cost of wind turbine installation. Furthermore, the installation equipment 10 disclosed in this application can also improve adaptability to increasing wind turbine hub heights.

[0061] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help you understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An offshore wind turbine installation device, characterized in that: The invention comprises a jacket (1), a truss structure (2) and a crane assembly (3), wherein the jacket (1) forms a lifting channel, and the lifting channel extends along the height direction of the offshore wind turbine installation equipment. The truss structure (2) is inserted into the lifting channel and can move up and down along the lifting channel in the height direction. The top end of the truss structure (2) is located outside the lifting channel and is connected to the crane assembly (3).

2. The offshore wind turbine installation equipment according to claim 1, characterized in that: The truss structure (2) is provided with a plurality of racks extending in a height direction, and the plurality of racks are arranged around the truss structure (2); The lifting channel is equipped with a lifting device (4), and the lifting device (4) includes a power source and a plurality of gear sets connected to the power source in a transmission manner, and each of the gear sets is meshed with the rack in a one-to-one correspondence.

3. The offshore wind turbine installation equipment according to claim 1, characterized in that: The jacket (1) and the truss structure (2) both have a center line extending in a height direction, and the center line of the truss structure (2) coincides with the center line of the jacket (1).

4. The offshore wind turbine installation equipment according to claim 1, characterized in that: The catheter frame (1) comprises a plurality of support legs (11), each of the support legs (11) extending in a height direction, and a top end of each of the support legs (11) tilting in a direction approaching each other.

5. The offshore wind turbine installation equipment according to claim 4, characterized in that: It also includes an anti-sinking plate (13), which extends in a horizontal direction and is connected to the bottoms of at least two of the supporting legs (11).

6. The offshore wind turbine installation equipment according to claim 4, characterized in that: A plurality of connecting rod groups (14) are provided between two adjacent supporting legs (11), each connecting rod group (14) including two connecting rods (141), both ends of the two connecting rods (141) in the same connecting rod group (14) are fixedly connected to the supporting legs (11) on the corresponding side, and the middle parts of the two connecting rods (141) are fixedly connected.

7. The offshore wind turbine installation equipment according to any one of claims 1 to 6, characterized in that: The crane assembly (3) comprises a boom (32), wherein the boom (32) is capable of rotating relative to the truss structure (2) within a first rotation plane, wherein the first rotation plane is a plane in which a height direction is located; An arm rest frame (15) is provided on the top of the catheter frame (1), and the arm rest frame (15) extends outward from a side where the catheter frame (1) is located, and the arm rest frame (15) is located in the first rotation plane.

8. The offshore wind turbine installation equipment according to claim 7, characterized in that: The crane assembly (3) further comprises a base (31) connected to the top of the truss structure (2) and a counterweight arm (33) connected to the base (31), wherein the counterweight arm (33) and the crane arm (32) are arranged relative to each other in the horizontal direction.

9. The offshore wind turbine installation equipment according to claim 8, characterized in that: The counterweight arm (33) includes a first arm segment (331) having one end rotatably connected to the base (31), the other end of the first arm segment (331) being hinged to one end of a second arm segment (332), and the other end of the second arm segment (332) being used to lift the counterweight (334); The crane assembly (3) further comprises a driving hydraulic component (333), wherein one of the cylinder and the piston of the driving hydraulic component (333) is connected to the base (31), and the other is connected to the second arm segment (332) to push the second arm segment (332) outward or pull it back.

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