Offshore wind turbine generator sling and control system thereof

Abstract

The invention relates to the technical field of wind turbine generator lifting appliances, in particular to an offshore wind turbine generator lifting appliance and a control system thereof. The offshore wind turbine generator lifting appliance comprises a bottom lifting appliance, a top lifting appliance connected with the bottom lifting appliance through a sling, a fixing assembly used for clamping a wind turbine tower drum and lifting ropes located on the two sides of the top end of the top lifting appliance. Middle channels are arranged in the middle of the bottom lifting appliance and the middle of the top lifting appliance, positioning assemblies are arranged in the middle channels, two side frames are arranged at the two ends of the bottom lifting appliance, and adjusting assemblies and synchronous push-out assemblies are installed in the two side frames correspondingly. According to the lifting appliance, the middle channel is integrated into the lifting appliance, the function of lifting a wind turbine tower drum and a wind turbine tower body through one lifting appliance can be achieved, through the arrangement of a rectangular frame and a first swing rod, in the lifting process of the wind turbine tower drum, a positioning assembly slides downwards, butt joint of the tower drum is positioned, and meanwhile, the lifting appliance can be used for lifting the wind turbine tower drum. Auxiliary supporting is carried out through supporting contact between the rectangular frame and the tower drum on the lower side.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine hoisting equipment, and in particular to an offshore wind turbine hoisting equipment and a control system thereof. Background Art

[0002] Offshore wind turbines play an important role in energy supply and environmental protection. The surface friction on the sea is small, and there are no obstacles such as mountains, hills, and buildings. Therefore, the wind speed is usually about 20% higher than on land. The vast ocean area provides ample space for the large-scale development of offshore wind farms.

[0003] When hoisting a wind turbine at sea, it is often necessary to select corresponding hoisting tools according to the hoisted components, usually including tower hoists, blade hoists and nacelle hoists. Different hoists often need to be replaced multiple times during the hoisting process of the wind turbine. Each replacement of the hoist takes a lot of time after disassembly, installation and function verification. Combined with the real-time changes in offshore wind conditions, the effective working time of the day is reduced, which affects work efficiency and extends the construction period.

[0004] Therefore, it is necessary to invent an offshore wind turbine hoist and a control system thereof to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an offshore wind turbine hoist and a control system thereof, so that a single hoist can meet the function of hoisting a wind turbine tower and a wind turbine blade through an integrated setting, thereby saving time.

[0006] To achieve this object, the present invention adopts the following technical solutions: Provided is an offshore wind turbine hoist, comprising a bottom hoist, a top hoist connected to the bottom hoist by a sling, a fixing assembly for clamping a wind turbine tower, and slings located on both sides of the top end of the top hoist, wherein the middle parts of the bottom hoist and the top hoist are both provided with a middle channel for accommodating the wind turbine tower, a positioning assembly for facilitating guidance is arranged inside the middle channel located at the bottom end of the bottom hoist, two side frames are arranged at both ends of the bottom hoist, an adjustment assembly and a synchronous ejection assembly are respectively installed inside the two side frames, the adjustment assembly comprises a rectangular frame and a flip support plate, a positioning pin is detachably installed at one end of the rectangular frame, the positioning pin is hinged with the positioning assembly, the synchronous ejection assembly is used for synchronously sliding outward or inward, the synchronous ejection assembly comprises a U-shaped block and a top clamping block, the U-shaped block is used to drive the flip support plate to tilt to one side; when the synchronous ejection assembly is synchronously pushed outward, the top clamping block and the flip support plate clamp the top and bottom ends of the wind turbine blade respectively.

[0007] As a preferred solution for an offshore wind turbine hoist, the adjustment assembly also includes a hinged plate, an upper swing rod, a lower swing rod and a bottom clamping block. The hinged plate can slide along the longitudinal direction of the rectangular frame. The hinged plate is hinged to the bottom end of the upper swing rod and the top end of the lower swing rod respectively. The top end of the upper swing rod is hinged to the U-shaped block, the bottom end of the lower swing rod is hinged to the flip support plate, one side of the flip support plate is hinged to the bottom end of the rectangular frame, and the end of the flip support plate is hinged to the bottom clamping block.

[0008] As a preferred solution for an offshore wind turbine hanger, the positioning assembly also includes a bottom guide frame, an extension arm and a rocker arm 1. The bottom hanger also includes a longitudinal hinged rod. The bottom guide frame is located below the middle channel at the bottom end of the bottom hanger. The extension arm is fixedly installed on both sides of the bottom guide frame and extends to the interior of the bottom hanger. The top of the extension arm is hinged to one end of the rocker arm 1, the middle part of the rocker arm 1 is hinged to one side of the longitudinal hinged rod, the other end of the rocker arm 1 is hinged to the positioning pin, and the hinge holes at both ends of the rocker arm 1 are provided with waist-shaped grooves. The longitudinal hinged rod can fix the rocker arm 1 by bolts.

[0009] As a preferred solution for an offshore wind turbine hoist, the synchronous ejection assembly also includes a fixed cross bar, a fixed longitudinal bar, a guide rail 2, a middle fixed plate, a synchronous push rod, a rotation adjustment plate, a rotating shaft, a synchronous slider and a second cylinder. Multiple fixed cross bars and fixed longitudinal bars are fixedly installed on the inner sides of the frames on both sides, and the fixed longitudinal bars on both sides are fixedly connected to the middle fixed plate. The second guide rail is fixedly installed on one end of the fixed longitudinal bar, the rotating shaft is located in the middle of the middle fixed plate, and the rotation adjustment plate is rotationally connected to the rotating shaft. The synchronous sliders are respectively located on both sides of the middle fixed plate and slide along the second guide rail. The two ends of the synchronous push rod are respectively hinged to the synchronous slider and the rotation adjustment plate. A second cylinder is fixedly installed on one side of the fixed cross bar, and the telescopic end of the second cylinder is fixedly connected to the synchronous slider on one side.

[0010] As a preferred solution for an offshore wind turbine hoist, the U-shaped block is fixedly connected to the upper synchronous slider, the opening of the U-shaped block is downward, the synchronous slider located below is fixedly connected to the bottom extension block, and the top clamping block is fixedly installed on the bottom end of the bottom extension block.

[0011] As a preferred solution for an offshore wind turbine hoist, the adjustment assembly also includes a cross bar 1, a cylinder 1 and a cross bar 2. The cross bar 1 is located on the inner side of the rectangular frame and is fixedly connected to the inner wall of the bottom hoist. The cross bar 2 is fixedly installed on the top of the rectangular frame. The cylinder 1 is fixedly installed on the top of the cross bar 1, and the output end of the cylinder 1 is fixedly connected to the cross bar 2. The cylinder 1 is used to lift the rectangular frame as a whole.

[0012] As a preferred solution for an offshore wind turbine hoist, a longitudinal rod 1 is arranged in the longitudinal direction of the rectangular frame, the longitudinal rod 1 is located on the side close to the positioning assembly, and the positioning pin is detachably installed on one side of the longitudinal rod 1. A plurality of guide rails 1 are also arranged in the longitudinal direction of the rectangular frame, and the hinged plate slides along the guide rail 1.

[0013] As a preferred solution for an offshore wind turbine hanger, the positioning assembly also includes a top limit frame and a longitudinal guide rod. The top limit frame is located on the inner side of the bottom hanger, and a plurality of longitudinal guide rods are located at the top of the bottom guide frame. The longitudinal guide rods pass through the middle channel and extend to the bottom end of the top limit frame.

[0014] As a preferred solution for the offshore wind turbine lifting device, the top clamping block and the bottom clamping block are both made of flexible material.

[0015] A control system is provided, step S1: when hoisting a wind turbine tower, by fixing a bottom hoist and a top hoist at the top and bottom ends of the wind turbine tower respectively, installing a positioning pin and forming a hinge with a swing rod 1, and removing a bolt on the longitudinal hinge rod for fixing the swing rod 1; Step S2: When the wind turbine tower is hoisted to the designated position, cylinder 1 lifts the rectangular frame, and cylinder 2 lifts the synchronous slider, so that the hinged plate slides synchronously with the rectangular frame, the flip support plate at the bottom of the rectangular frame is in a horizontal state, and the adjustment assembly slides longitudinally as a whole to provide auxiliary support for the wind turbine tower; Step S3: During the upward sliding of the adjustment assembly, the swing bars 1 on both sides can drive the bottom guide frame to slide downward synchronously, thereby reducing the difficulty of docking the wind turbine tower; Step S4: when hoisting the wind turbine blade, remove the positioning pin and install a bolt for fixing the swing arm 1 on the longitudinal hinge rod; Step S5: placing the wind turbine blade under the bottom hanger, closing the first cylinder, lifting the synchronous slider with the second cylinder, driving the hinged plate to slide longitudinally, driving the flip support plate to tilt upwards with the lower swing rod, supporting the bottom end of the wind turbine blade by the bottom clamping block, driving the bottom extension block to slide downwards with the synchronous slider, and clamping the top clamping block at its bottom end to the top end of the wind turbine blade; Step S6: After the wind turbine blades are fixed, cylinder 2 drives the synchronous slider to slide inward, so that the top clamping block and the bottom clamping block are away from the wind turbine blades, causing the flip support plate to be in a horizontal state, and cylinder 1 is turned on to drive the rectangular frame to slide upward as a whole. Under the action of the lower swing rod, the flip support plate tilts downward as a whole, and the space below is opened, which facilitates the separation of the hoist as a whole from the wind turbine blades.

[0016] The beneficial effects of the present invention are as follows: by integrating the middle channel into the interior of the hoist, the function of hoisting the wind turbine tower and the wind turbine tower body with a single hoist can be realized; by setting the rectangular frame and the swing arm 1, the positioning assembly can be slid downward during the hoisting of the wind turbine tower to position the tower joint; at the same time, the rectangular frame is in contact with the support of the lower tower to provide auxiliary support, which can reduce the load pressure of the main crane, enhance stability, and improve hoisting safety; in the process of hoisting the wind turbine blades, the combined use of the synchronous push-out assembly and the adjustment assembly can achieve the effect of clamping the upper and lower ends of the wind turbine blades. As a result, the bending deformation of the wind turbine blades during the installation process can be reduced by clamping at the upper and lower ends, and the stress can be dispersed to reduce the risk of local fatigue. Since the blades are clamped by the upper and lower clamping forces at the same time, their overall stability is higher, and they can better resist the influence of external factors such as wind and waves, thereby improving the safety during the installation process. At the same time, the difficulty of separating the hoist from the wind turbine blades can be reduced by controlling the lifting of the adjustment component and the synchronous pushing component. By integrating the two hoists into one place, the occupied area of ​​multiple hoists can be reduced, freeing up the space on the deck. At the same time, compared with the previous multiple hoists, the integrated hoist can reduce the purchase cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required to be used in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the hoisted wind turbine blade of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall partial assembly of the hoisted wind turbine tower of the present invention.

[0020] Figure 3 It is a schematic diagram of the position relationship of the synchronous ejection components of the present invention.

[0021] Figure 4 It is a schematic diagram of partial assembly of the bottom hanger of the present invention.

[0022] Figure 5 The present invention Figure 4 Enlarged structural diagram at A in the middle.

[0023] Figure 6 It is a schematic diagram of the overall structure of the regulating component of the present invention.

[0024] Figure 7 It is a schematic diagram of the side assembly structure of the rectangular frame of the present invention.

[0025] Figure 8 It is a schematic diagram of the internal structure of the synchronous ejection component of the present invention.

[0026] Fig. 9 It is a schematic diagram of the position relationship structure of the positioning components of the present invention.

[0027] Fig.10 The present invention Fig. 9 Enlarged structural diagram at B in the middle.

[0028] Fig.11 It is a schematic diagram of the assembly relationship structure of the positioning component of the present invention.

[0029] In the figure: 1. Bottom sling; 101. Two side frames; 103. Longitudinal hinged rod; 2. Top sling; 3. Lifting rope; 4. Wind turbine blades; 5. Wind turbine tower; 6. Adjustment assembly; 601. Crossbar 1; 602. Cylinder 1; 603. Crossbar 2; 604. Guide rail 1; 605. Turnover support plate; 606. Bottom clamping block; 607. Lower swing rod; 608. Hinge plate; 609. Upper swing rod; 611. Longitudinal rod 1; 612. Rectangular frame; 7. Positioning assembly; 701. bottom guide frame; 702. top limit frame; 703. longitudinal guide rod; 704. extension arm; 705. swing rod 1; 706. positioning pin; 707. waist groove; 8. Synchronous ejection assembly; 801. Fixed cross bar; 802. Fixed longitudinal bar; 803. Guide rail 2; 804. Middle fixed plate; 805. Synchronous push rod; 806. Rotation adjustment plate; 807. Rotating shaft; 808. Synchronous slider; 809. U-shaped block; 810. Bottom extension block; 811. Top clamping block; 812. Cylinder 2; 9. Middle channel. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0031] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] refer to Figures 1 to 11 The present invention provides an offshore wind turbine hoist, comprising a bottom hoist 1, a top hoist 2 connected to the bottom hoist 1 by a sling, a fixing assembly for clamping a wind turbine tower 5, and slings 3 located on both sides of the top of the top hoist 2, wherein the middle of the bottom hoist 1 and the top hoist 2 are both provided with a middle channel 9 for accommodating the wind turbine tower 5, a positioning assembly 7 for facilitating guidance is arranged inside the middle channel 9 located at the bottom end of the bottom hoist 1, two side frames 101 are arranged at both ends of the bottom hoist 1, and an adjustment assembly 6 and a synchronous ejection assembly are respectively installed inside the two side frames 101. 8, the adjustment component 6 includes a rectangular frame 612 and a flip support plate 605, one end of the rectangular frame 612 is detachably mounted with a positioning pin 706, the positioning pin 706 is hinged with the positioning component 7, the synchronous push-out component 8 is used for synchronous outward or inward sliding, the synchronous push-out component 8 includes a U-shaped block 809 and a top clamping block 811, the U-shaped block 809 is used to drive the flip support plate 605 to tilt to one side; when the synchronous push-out component 8 is synchronously pushed outward, the top clamping block 811 and the flip support plate 605 clamp the top and bottom ends of the wind turbine blade 4 respectively. The guide rail 1 604 inside the adjustment component 6 can be replaced with a slide slot to avoid the guide rail 1 604 from breaking during the hoisting process, resulting in equipment failure.

[0035] The adjustment assembly 6 further includes a hinge plate 608, an upper swing rod 609, a lower swing rod 607 and a bottom clamping block 606. The hinge plate 608 can slide along the longitudinal direction of the rectangular frame 612. The hinge plate 608 is hinged at the bottom end of the upper swing rod 609 and the top end of the lower swing rod 607 respectively. The top end of the upper swing rod 609 is hinged to the U-shaped block 809. The bottom end of the lower swing rod 607 is hinged to the flip support plate 605. One side of the flip support plate 605 is hinged to the bottom end of the rectangular frame 612. The end of the flip support plate 605 is hinged to the bottom clamping block 606. By controlling the relative position between the hinge plate 608 and the rectangular frame 612, the tilting direction of the flip support plate 605 can be controlled to achieve position adjustment of multiple angles of 180 degrees, so that it can play different roles in different positions.

[0036] The positioning assembly 7 also includes a bottom guide frame 701, an extension arm 704 and a rocker arm 705. The bottom hanger 1 also includes a longitudinal hinged rod 103. The bottom guide frame 701 is located below the middle channel 9 at the bottom end of the bottom hanger 1. The extension arm 704 is fixedly installed on both sides of the bottom guide frame 701 and extends to the interior of the bottom hanger 1. The top of the extension arm 704 is hinged to one end of the rocker arm 705, the middle of the rocker arm 705 is hinged to one side of the longitudinal hinged rod 103, the other end of the rocker arm 705 is hinged to the positioning pin 706, and the hinge holes at both ends of the rocker arm 705 are provided with waist-shaped grooves 707. The longitudinal hinged rod 103 can fix the rocker arm 705 by bolts. The waist-shaped groove 707 is provided to ensure that the bottom guide frame 701 can maintain vertical sliding during the rotation of the swing arm 705. The bolts on the longitudinal hinge rod 103 are provided to prevent the positioning assembly 7 from sliding downward as a whole when hoisting the wind turbine blade 4, causing the bottom guide frame 701 to damage the surface of the wind turbine blade 4 and cause a safety hazard.

[0037] The synchronous ejection assembly 8 also includes a fixed cross bar 801, a fixed longitudinal bar 802, a second guide rail 803, a middle fixed plate 804, a synchronous push rod 805, a rotation adjustment plate 806, a rotating shaft 807, a synchronous slider 808 and a second cylinder 812. The plurality of fixed cross bars 801 and fixed longitudinal bars 802 are fixedly installed on the inner side of the two side frames 101. The fixed longitudinal bars 802 on both sides are fixedly connected to the middle fixed plate 804. The second guide rail 803 is fixedly installed on one end of the fixed longitudinal bar 802. The rotating shaft 807 is located in the middle of the middle fixed plate 804, the rotating adjustment plate 806 is rotatably connected with the rotating shaft 807, the synchronous slider 808 is respectively located on both sides of the middle fixed plate 804, and slides along the second guide rail 803, the two ends of the synchronous push rod 805 are respectively hinged with the synchronous slider 808 and the rotating adjustment plate 806, and the cylinder 2 812 is fixedly installed on one side of the fixed cross bar 801, and the telescopic end of the cylinder 2 812 is fixedly connected with the synchronous slider 808 on one side. The sliding of the upper synchronous slider 808 can control the tilt angle of the flip support plate 605, and the sliding of the lower synchronous slider 808 can control the clamping of the upper surface of the wind turbine blade 4. The position of the synchronous slider 808 is controlled by the cylinder 2 812 to meet the purpose of clamping the wind turbine blade 4.

[0038] The U-shaped block 809 is fixedly connected with the synchronous slider 808 above, the opening of the U-shaped block 809 is downward, and the synchronous slider 808 located below is fixedly connected with the bottom extension block 810, and the top clamping block 811 is fixedly installed on the bottom end of the bottom extension block 810. By controlling the length of the U-shaped block 809, the length of the upper swing rod 609 can be reduced to avoid stress concentration, thereby facilitating the control of the inclination angle of the flip support plate 605.

[0039] The adjustment assembly 6 also includes a crossbar 1 601, a cylinder 1 602 and a crossbar 2 603. The crossbar 1 601 is located inside the rectangular frame 612 and is fixedly connected to the inner wall of the bottom hanger 1. The crossbar 2 603 is fixedly installed at the top of the rectangular frame 612. The cylinder 1 602 is fixedly installed at the top of the crossbar 1 601, and the output end of the cylinder 1 602 is fixedly connected to the crossbar 2 603. The cylinder 1 602 is used to lift the rectangular frame 612 as a whole. By fixing the crossbar 1 601 to the bottom hanger 1 and the rectangular frame 612 sliding inside the two side frames 101, the adjustment assembly 6 can be prevented from being offset during the adjustment process, thereby ensuring the accuracy of the hoisting process.

[0040] The rectangular frame 612 is provided with a longitudinal rod 611 in the longitudinal direction, the longitudinal rod 611 is located on a side close to the positioning assembly 7, and the positioning pin 706 is detachably mounted on one side of the longitudinal rod 611. The rectangular frame 612 is also provided with a plurality of guide rails 604 in the longitudinal direction, and the hinge plate 608 slides along the guide rails 604. Through the arrangement of the longitudinal rod 611 and the positioning pin 706, the positioning assembly 7 can be driven to move downward as a whole, so that the installation position can be guided and positioned by the bottom guide frame 701.

[0041] The positioning assembly 7 also includes a top limit frame 702 and a longitudinal guide rod 703. The top limit frame 702 is located on the inner side of the bottom hanger 1. A plurality of longitudinal guide rods 703 are located at the top of the bottom guide frame 701. The longitudinal guide rods 703 pass through the middle channel 9 and extend to the bottom end of the top limit frame 702.

[0042] The top clamping block 811 and the bottom clamping block 606 are both made of flexible material. The selection of flexible material avoids damaging the wind turbine blade 4, and the bottom clamping block 606 is hinged so that it can be adjusted according to the tilt angle of the wind turbine blade 4.

[0043] The present invention provides a control system for an offshore wind turbine hoist, step S1: when hoisting a wind turbine tower 5, by fixing a bottom hoist 1 and a top hoist 2 at the top and bottom of the wind turbine tower 5 respectively, installing a positioning pin 706 and forming a hinge with a swing rod 1 705, and removing the bolts on the longitudinal hinge rod 103 for fixing the swing rod 1 705; Step S2: When the wind turbine tower 5 is hoisted to the designated position, the cylinder 1 602 lifts the rectangular frame 612, and the cylinder 2 812 lifts the synchronous slider 808, so that the hinged plate 608 slides synchronously with the rectangular frame 612, and the flip support plate 605 at the bottom of the rectangular frame 612 is in a horizontal state, and the adjustment assembly 6 slides longitudinally as a whole to provide auxiliary support for the wind turbine tower 5; Step S3: During the upward sliding of the adjustment assembly 6, the swing rods 705 on both sides can drive the bottom guide frame 701 to slide downward synchronously, thereby reducing the difficulty of docking the wind turbine tower 705; Step S4: when hoisting the wind turbine blade 4, remove the positioning pin 706 and install a bolt for fixing the swing arm 705 on the longitudinal hinge rod 103; Step S5: Place the wind turbine blade 4 below the bottom hanger 1, close the cylinder 1 602, lift the synchronous slider 808 with the cylinder 2 812, drive the hinged plate 608 to slide longitudinally with the upper swing rod 609, drive the flip support plate 605 to tilt upward with the lower swing rod 607, support the bottom end of the wind turbine blade 4 with the bottom clamping block 606, and drive the bottom extension block 810 to slide downward with the synchronous slider 808, and the top clamping block 811 at the bottom clamps the top end of the wind turbine blade 4; Step S6: After the wind turbine blade 4 is fixed, cylinder 2 812 drives the synchronous slider 808 to slide inward, so that the top clamping block 811 and the bottom clamping block 606 are both away from the wind turbine blade 4, causing the flip support plate 605 to be in a horizontal state, and cylinder 1 602 is turned on to drive the rectangular frame 612 to slide upward as a whole. Under the action of the swing rod 607, the flip support plate 605 tilts downward as a whole, and the space below is opened, which facilitates the separation of the sling as a whole from the wind turbine blade 4.

[0044] The present invention integrates the middle channel 9 into the interior of the hoist, so as to realize the function of hoisting the wind turbine tower 5 and the wind turbine tower body with a hoist. Through the arrangement of the rectangular frame 612 and the swing arm 705, the positioning component 7 can slide downward during the hoisting of the wind turbine tower 5 to position the tower. At the same time, the rectangular frame 612 is in contact with the support of the lower tower to provide auxiliary support, which can reduce the load pressure of the main crane, enhance stability, and improve hoisting safety. In the process of hoisting the wind turbine blade 4, the combination of the synchronous push-out component 8 and the adjustment component 6 can realize the upper and lower ends of the wind turbine blade 4. The clamping effect can reduce the bending deformation of the wind turbine blade 4 during the hoisting process by clamping at the upper and lower ends, and at the same time disperse the stress and reduce the risk of local fatigue. Since the blade is clamped by the clamping force from above and below at the same time, its overall stability is higher, and it can better resist the influence of external factors such as wind and waves, thereby improving the safety during the hoisting process. At the same time, by controlling the lifting and lowering of the adjustment component 6 and the synchronous ejection component 8, the difficulty of separating the hoist from the wind turbine blade 4 can be reduced. By integrating the two hoists into one place, the occupied area of ​​multiple hoists can be reduced, freeing up the space on the deck. At the same time, compared with the previous multiple hoists, the integrated hoist can reduce the purchase cost.

[0045] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. An offshore wind turbine hoist, characterized in that: The invention comprises a bottom sling (1), a top sling (2) connected to the bottom sling (1) via a sling, a fixing component for clamping a wind turbine tower (5), and slings (3) located at both sides of the top of the top sling (2), wherein the middle of the bottom sling (1) and the top sling (2) are both provided with a middle channel (9) for accommodating the wind turbine tower (5), a positioning component (7) for facilitating guidance is arranged inside the middle channel (9) located at the bottom end of the bottom sling (1), two side frames (101) are arranged at both ends of the bottom sling (1), and an adjustment component (6) and a synchronous ejection component (8) are respectively installed inside the two side frames (101), and the adjustment component (6) comprises a rectangular frame (612) and a flip support plate (605), one end of the rectangular frame (612) is detachably mounted with a positioning pin (706), the positioning pin (706) is hinged with the positioning assembly (7), the synchronous ejection assembly (8) is used for synchronously sliding outward or inward, the synchronous ejection assembly (8) comprises a U-shaped block (809) and a top clamping block (811), the U-shaped block (809) is used to drive the flip support plate (605) to tilt to one side; when the synchronous ejection assembly (8) is synchronously ejected outward, the top clamping block (811) and the flip support plate (605) clamp the top end and the bottom end of the wind turbine blade (4) respectively.

2. The offshore wind turbine lifting device according to claim 1, characterized in that: The adjustment assembly (6) further comprises a hinged plate (608), an upper swing rod (609), a lower swing rod (607) and a bottom clamping block (606); the hinged plate (608) is capable of sliding in the longitudinal direction of the rectangular frame (612); the hinged plate (608) is hinged to the bottom end of the upper swing rod (609) and the top end of the lower swing rod (607), respectively; the top end of the upper swing rod (609) is hinged to the U-shaped block (809); the bottom end of the lower swing rod (607) is hinged to the flip support plate (605); one side of the flip support plate (605) is hinged to the bottom end of the rectangular frame (612); and the end of the flip support plate (605) is hinged to the bottom clamping block (606).

3. The offshore wind turbine lifting device according to claim 2, characterized in that: The positioning assembly (7) also includes a bottom guide frame (701), an extension arm (704) and a swing rod (705). The bottom hanger (1) also includes a longitudinal hinged rod (103). The bottom guide frame (701) is located below the middle channel (9) at the bottom end of the bottom hanger (1). The extension arm (704) is fixedly mounted on both sides of the bottom guide frame (701) and extends to the inside of the bottom hanger (1). The top of the extension arm (704) is hinged to one end of the swing rod (705). The middle of the swing rod (705) is hinged to one side of the longitudinal hinged rod (103). The other end of the swing rod (705) is hinged to the positioning pin (706). The hinge holes at both ends of the swing rod (705) are provided with waist-shaped grooves (707). The longitudinal hinged rod (103) can fix the swing rod (705) by bolts.

4. The offshore wind turbine lifting device according to claim 3, characterized in that: The synchronous ejection assembly (8) further comprises a fixed cross bar (801), a fixed longitudinal bar (802), a second guide rail (803), a middle fixed plate (804), a synchronous push rod (805), a rotation adjustment plate (806), a rotating shaft (807), a synchronous slider (808) and a second cylinder (812). The plurality of fixed cross bars (801) and the fixed longitudinal bars (802) are fixedly mounted on the inner sides of the two side frames (101). The fixed longitudinal bars (802) on both sides are fixedly connected to the middle fixed plate (804). The second guide rail (803) is fixedly mounted on the fixed longitudinal bars (802). At one end, the rotating shaft (807) is located in the middle of the middle fixed plate (804), the rotating adjustment plate (806) and the rotating shaft (807) are rotatably connected, the synchronous sliders (808) are respectively located on both sides of the middle fixed plate (804) and slide along the second guide rail (803), the two ends of the synchronous push rod (805) are respectively hinged with the synchronous slider (808) and the rotating adjustment plate (806), and the second cylinder (812) is fixedly installed on one side of the fixed cross bar (801), and the telescopic end of the second cylinder (812) is fixedly connected with the synchronous slider (808) on one side.

5. The offshore wind turbine lifting device according to claim 4, characterized in that: The U-shaped block (809) is fixedly connected to the synchronous slider (808) above, the opening of the U-shaped block (809) is downward, the synchronous slider (808) located below is fixedly connected to the bottom extension block (810), and the top clamping block (811) is fixedly mounted on the bottom end of the bottom extension block (810).

6. The offshore wind turbine lifting device according to claim 2, characterized in that: The adjustment assembly (6) also includes a cross bar 1 (601), a cylinder 1 (602) and a cross bar 2 (603). The cross bar 1 (601) is located on the inner side of the rectangular frame (612) and is fixedly connected to the inner wall of the bottom hanger (1). The cross bar 2 (603) is fixedly installed on the top of the rectangular frame (612). The cylinder 1 (602) is fixedly installed on the top of the cross bar 1 (601), and the output end of the cylinder 1 (602) is fixedly connected to the cross bar 2 (603). The cylinder 1 (602) is used to lift the rectangular frame (612) as a whole.

7. The offshore wind turbine lifting device according to claim 6, characterized in that: A longitudinal rod one (611) is provided in the longitudinal direction of the rectangular frame (612), the longitudinal rod one (611) is located on a side close to the positioning assembly (7), and the positioning pin (706) is detachably mounted on one side of the longitudinal rod one (611). A plurality of guide rails one (604) are also provided in the longitudinal direction of the rectangular frame (612), and the hinge plate (608) slides along the guide rail one (604).

8. The offshore wind turbine lifting device according to claim 3, characterized in that: The positioning assembly (7) further comprises a top limiting frame (702) and longitudinal guide rods (703), wherein the top limiting frame (702) is located on the inner side of the bottom hanger (1), and a plurality of longitudinal guide rods (703) are located on the top end of the bottom guide frame (701), and the longitudinal guide rods (703) penetrate the middle channel (9) and extend to the bottom end of the top limiting frame (702).

9. The offshore wind turbine lifting device according to claim 2, characterized in that: The top clamping block (811) and the bottom clamping block (606) are both made of flexible material.

10. A control system for an offshore wind turbine hoist according to any one of claims 1 to 9, characterized in that: Step S1: when hoisting the wind turbine tower (5), the bottom hoist (1) and the top hoist (2) are respectively fixed to the top and bottom ends of the wind turbine tower (5), the positioning pin (706) is installed and hinged with the swing rod 1 (705), and the bolts used to fix the swing rod 1 (705) on the longitudinal hinge rod (103) are removed; Step S2: When the wind turbine tower (5) is hoisted to the designated position, the cylinder 1 (602) lifts the rectangular frame (612), and the cylinder 2 (812) lifts the synchronous slider (808), so that the hinged plate (608) slides synchronously with the rectangular frame (612), the flip support plate (605) at the bottom end of the rectangular frame (612) is in a horizontal state, and the adjustment component (6) slides longitudinally as a whole to provide auxiliary support for the wind turbine tower (5); Step S3: during the upward sliding process of the adjustment component (6), the swing rods 1 (705) on both sides can drive the bottom guide frame (701) to slide downward synchronously, thereby reducing the difficulty of docking the wind turbine tower (705); Step S4: when hoisting the wind turbine blade (4), the positioning pin (706) is removed, and a bolt for fixing the swing arm 1 (705) is installed on the longitudinal hinge rod (103); Step S5: placing the wind turbine blade (4) below the bottom hanger (1), closing the cylinder 1 (602), lifting the synchronous slider (808) with the cylinder 2 (812), driving the hinged plate (608) to slide longitudinally with the upper swing rod (609), driving the flip support plate (605) to tilt upward with the lower swing rod (607), supporting the bottom end of the wind turbine blade (4) with the bottom clamping block (606), driving the bottom extension block (810) to slide downward with the synchronous slider (808), and clamping the top end of the wind turbine blade (4) with the top clamping block (811); Step S6: After the wind turbine blade (4) is fixed, the second cylinder (812) drives the synchronous slider (808) to slide inward, so that the top clamping block (811) and the bottom clamping block (606) are both away from the wind turbine blade (4), so that the flip support plate (605) is in a horizontal state, and the first cylinder (602) is turned on to drive the rectangular frame (612) to slide upward as a whole. Under the action of the swing rod (607), the flip support plate (605) tilts downward as a whole, and the space below is opened, so that the sling as a whole is easy to separate from the wind turbine blade (4).

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