Offshore wind turbine impeller hoisting system and technology thereof

Abstract

The invention discloses an offshore wind turbine impeller hoisting system and process. The offshore wind turbine impeller hoisting system comprises a self-elevating platform, a blade transport ship, a hoisting beam assembly and a second cable wind mechanism. Three blades are arranged on the blade transport ship in parallel and are parked on one broadside of the self-elevating platform in parallel; a main crane is mounted on one side, close to the blade transport ship, of the upper surface of the self-elevating platform, the main crane is provided with a first cable wind mechanism, and the first cable wind mechanism is provided with two groups of first cable wind ropes; second cable wind mechanisms are symmetrically installed at the positions, close to the two ends, of the upper surface of the hanging beam assembly, a hub is placed on a deck of the self-elevating platform through an installation base of the hub, and then three blades are hoisted one by one through cooperation of the main crane, the first cable wind mechanisms and the hanging beam assembly and assembled with the hub to form an impeller. And then the impeller is lifted and turned over through auxiliary cooperation of the second cable wind mechanism. According to the self-elevating platform, cross operation is reduced, and a larger impeller can be assembled on the self-elevating platform.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power foundations, and particularly to an offshore wind turbine impeller hoisting system and its process. Background Art

[0002] The split assembly of offshore wind turbines is generally divided into a single-blade installation process and an impeller installation process; among them, the impeller installation process needs to complete the assembly of the blade and the hub on the deck of the jack-up platform. After the assembly is completed, the entire impeller is hoisted and then docked with the nacelle. Since the blades are relatively large, generally a process of lifting by two cranes is adopted during the impeller assembly. However, as the impeller size gradually increases, it is easy to have spatial interference when two cranes jointly assemble the impeller, and it is easy to cause damage to the blades by using manual or simple mechanical wind ropes. Therefore, the above problems need to be solved urgently. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an offshore wind turbine impeller hoisting system and its process. Through the combined use of the main crane and the lifting beam assembly, and then through the auxiliary cooperation of the first wind-roping mechanism and the second wind-roping mechanism, the assembly and hoisting of the impeller can be completed safely and efficiently. Furthermore, only a single crane is required during the impeller assembly and hoisting process, greatly reducing cross-operation, and enabling the jack-up platform to assemble larger impellers.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: An offshore wind turbine impeller hoisting system of the present invention is characterized in that: it includes a jack-up platform, a blade transport ship, a lifting beam assembly, and a second wind-roping mechanism; three blades are installed side by side on the blade transport ship and are docked side by side on one side of the jack-up platform; a main crane is installed on the upper surface of the jack-up platform on the side close to the blade transport ship. The main crane is equipped with a first wind-roping mechanism, and the first wind-roping mechanism has 2 groups of first wind ropes; a second wind-roping mechanism is also symmetrically installed on the upper surface of the lifting beam assembly near its two ends. The hub is placed on the deck of the jack-up platform through its mounting seat. Then, through the cooperation of the main crane, the first wind-roping mechanism, and the lifting beam assembly, the three blades are hoisted one by one and assembled with the hub into an impeller, and then through the auxiliary cooperation of the second wind-roping mechanism, the impeller is hoisted and turned over.

[0005] Preferably, the suspension beam assembly includes a main suspension beam, a suspension plate, a left suspension beam, a right suspension beam and an intermediate suspension beam; the main suspension beam, the left suspension beam, the right suspension beam and the intermediate suspension beam are all truss structures welded and spliced by four horizontal steel pipes, several inclined reinforcing pipes and several vertical reinforcing pipes, and their vertical cross-sections match respectively. The lengths of the left suspension beam, the right suspension beam and the intermediate suspension beam are the same, and the length of the main suspension beam is greater than that of the left suspension beam; the left suspension beam, the main suspension beam and the right suspension beam are arranged horizontally and collinearly from left to right in sequence, and intermediate suspension beams are also arranged horizontally and collinearly between the left suspension beam and the main suspension beam, and between the main suspension beam and the right suspension beam respectively, and the left suspension beam, the intermediate suspension beam on the left side, the main suspension beam, the intermediate suspension beam on the right side and the right suspension beam are respectively screwed and fixed to each other; at the positions of the left and right cable wind points on the upper surface of the main suspension beam, suspension plates for hoisting are respectively provided, and the hoisting operation of the suspension beam assembly is carried out through the cooperation of the suspension plates with the main hoist and the first cable wind mechanism.

[0006] Preferably, it further includes a first winch, a Y-axis movement assembly, a moving plate, a counterweight, a third steel wire rope, a second steel wire rope and a second winch; the first winches are symmetrically arranged at intervals in the front and back at the middle position of the inner top surface of the main suspension beam, and the third steel wire rope is wound around the corresponding first winch, and it is ensured that the main suspension beam does not interfere with the winding action of the first winch through the third steel wire rope; the Y-axis movement assembly is horizontally longitudinally arranged at the middle position of the inner bottom surface of the main suspension beam, and the moving plate is horizontally arranged on the moving end of the Y-axis movement assembly, and moves horizontally longitudinally within the coverage range between the two first winches inside the main suspension beam through the Y-axis movement assembly; a counterweight for adjusting the balance of the suspension beam assembly is provided on the upper surface of the moving plate, and the counterweight moves horizontally longitudinally with the moving plate and does not interfere with the winding actions of the two first winches respectively; the second winches are symmetrically arranged at intervals in the front and back at the middle position on the left side of the inner top surface of the left suspension beam and at the middle position on the right side of the inner top surface of the right suspension beam respectively, and every two left and right second winches are symmetrically arranged, and the second steel wire rope is wound around each second winch, and it is ensured that the left suspension beam and the right suspension beam do not interfere with the winding actions of the corresponding second steel wire ropes respectively.

[0007] Preferably, it further includes a left flange, a right flange, a first rib plate, a second rib plate, and a limiting plate; on the left end faces of the four horizontal steel pipes of the main lifting beam, the left end faces of the four horizontal steel pipes of the intermediate lifting beam, and the left end faces of the four horizontal steel pipes of the right lifting beam, matching left flanges are respectively and fixedly attached; and on the right end faces of the four horizontal steel pipes of the main lifting beam, the right end faces of the four horizontal steel pipes of the intermediate lifting beam, and the right end faces of the four horizontal steel pipes of the left lifting beam, right flanges matching the left flanges are respectively and fixedly attached. Then, through the screw connection between the left flange and the corresponding right flange, the left lifting beam, the intermediate lifting beam on the left side, the main lifting beam, the intermediate lifting beam on the right side, and the right lifting beam are screwed and connected to each other; between the right side surface of each left flange and the corresponding horizontal steel pipe of the corresponding main lifting beam, intermediate lifting beam, and right lifting beam, several first rib plates are vertically arranged at equal intervals along the circumferential direction, and the corresponding left flanges are respectively fixed and strengthened by the first rib plates; between the left side surface of each right flange and the corresponding horizontal steel pipe of the corresponding main lifting beam, intermediate lifting beam, and left lifting beam, several second rib plates are vertically arranged at equal intervals along the circumferential direction, and the corresponding right flanges are respectively fixed and strengthened by the second rib plates; on the right side surface of each right flange, several limiting plates are vertically arranged at equal intervals along the circumferential direction. Each limiting plate is vertically arranged along the radial direction of the corresponding right flange, and all the limiting plates on the same right flange enclose a square area matching the corresponding left flange. Then, the docking of the left flange and the corresponding right flange is positioned by the limiting plate.

[0008] Preferably, it further includes a left fixing plate, a right fixing plate, and a strengthening plate; on the upper and lower surfaces of the four horizontal steel pipes of the main lifting beam near their left ends, the upper and lower surfaces of the four horizontal steel pipes of the intermediate lifting beam near their left ends, and the upper and lower surfaces of the four horizontal steel pipes of the right lifting beam near their left ends, left fixing plates are respectively and horizontally and fixedly attached, and each left fixing plate is spaced on the right side of the corresponding left flange; on the upper and lower surfaces of the four horizontal steel pipes of the main lifting beam near their right ends, the upper and lower surfaces of the four horizontal steel pipes of the intermediate lifting beam near their right ends, and the upper and lower surfaces of the four horizontal steel pipes of the left lifting beam near their right ends, right fixing plates matching the left fixing plates are respectively and horizontally and fixedly attached, and each right fixing plate is spaced on the left side of the corresponding right flange; between the outer surfaces of each left fixing plate and the corresponding adjacent right fixing plate, a matching strengthening plate is horizontally and fixedly attached. Each strengthening plate is respectively screwed and fixed to the corresponding left fixing plate and right fixing plate, and the thickness of the left fixing plate is required to ensure that each strengthening plate is spaced outside the corresponding right flange. Then, through the cooperation of the strengthening plate, left fixing plate, and right fixing plate, the connection parts between the left lifting beam, the intermediate lifting beam on the left side, the main lifting beam, the intermediate lifting beam on the right side, and the right lifting beam are strengthened.

[0009] Preferably, the second guy wire mechanism on the left side is arranged on the upper surface of the left hanging beam near the left side, and the second guy wire mechanism on the right side is arranged on the upper surface of the right hanging beam near the right side; each second guy wire mechanism includes a bottom plate, a first rotating shaft, a roller group, a first bracket, a second rotating shaft, a drum, a motor, a second guy wire rope and a rotating plate; on the upper surface of the left hanging beam near the left side and on the upper surface of the right hanging beam near the right side, bottom plates are respectively horizontally and fixedly attached, and each bottom plate does not interfere with the screw connection between the left hanging beam and the corresponding middle hanging beam and the screw connection between the right hanging beam and the corresponding middle hanging beam; each rotating plate is horizontally and spaced on the upper surface of the corresponding bottom plate, and a first rotating shaft is vertically and coaxially arranged between each rotating plate and the corresponding bottom plate, so that each rotating plate can rotate horizontally freely around the axis of the corresponding first rotating shaft; on the upper surface of each bottom plate, a roller group that abuts against the rotating plate is connected and provided in several turns relative to the position directly below the corresponding rotating plate, and several turns of the roller group are coaxially arranged with the corresponding first rotating shaft and are all arranged on the outer ring of the first rotating shaft. Each roller group is conical, with its small end near the first rotating shaft and its large end at the other end, so as to adapt to the smaller linear velocity near the first rotating shaft when the rotating plate rotates; on the outer side of the upper surface of each rotating plate, a first bracket is vertically provided, and the upper end of each first bracket is of a U-shaped structure; each second rotating shaft is horizontally arranged inside the upper end of the corresponding first bracket, and its two ends are respectively rotationally connected to the two side surfaces of the upper end of the corresponding first bracket; one end of each second rotating shaft vertically extends out of the outer side surface of the corresponding first bracket and is respectively connected to the output end of the corresponding motor through a coupling; on each second rotating shaft, a drum is coaxially sleeved and fixedly arranged relative to the inside of the upper end of the first bracket, and a second guy wire rope is wound around each drum. Thus, under the drive of the motor, guy wire operation is carried out through the second guy wire rope.

[0010] Preferably, they also all include a second bracket, a cylinder, a pressing claw and a pressing roller; on the upper surface of each rotating plate, a second bracket is vertically provided on the other side relative to the first bracket, and a cylinder is horizontally provided at the upper end of each second bracket. The telescopic end of each cylinder is horizontally arranged towards the corresponding drum and is respectively fixedly connected to the corresponding pressing claw; each pressing claw is a vertically arranged triangular structure, and its end far from the drum is respectively fixedly connected to the telescopic end of the corresponding cylinder. The two sides of each pressing claw close to the drum are arranged in the same vertical plane, and a pressing roller is coaxially rotatably sleeved on each of them, and the second guy wire rope is respectively pressed and wound tightly on the corresponding drum through the pressing roller; each pressing roller matches the inner circumferential surface of the corresponding drum, and its length corresponds to the longitudinal width of the inner circumferential surface of the corresponding drum, so as to prevent the second guy wire rope from loosening through the pressing roller.

[0011] Preferably, trays are horizontally provided at the force application points at the ends and the roots of the blades respectively, and the blades are supported on the two trays for hoisting; the two lifting points on one side of each tray relative to the blade are respectively connected to the winding ends of the corresponding second winches through second steel wires, and an automatic wire releasing mechanism and a nylon wire are respectively provided on the other side of each tray relative to the blade; one end of each nylon wire is fixedly connected to the corresponding automatic wire releasing mechanism, and the other end thereof sequentially passes downward through the two lifting points on the other side of the corresponding tray relative to the blade, and then is respectively sleeved upward on the wire releasing ends of the corresponding automatic wire releasing mechanisms; the upper ends of the automatic wire releasing mechanisms are respectively connected to the winding ends of the corresponding second winches through second steel wires, and then through the cooperation of the second winches, the main hoist and the first guy wire mechanism, the blade and the hub are butted and assembled, and then the wire is released through the wire releasing ends of the automatic wire releasing mechanisms, and the other ends of the nylon wires automatically disengage from the corresponding automatic wire releasing mechanisms and the trays, so that the trays can be recovered by detaching from the blades through the corresponding second steel wires.

[0012] Preferably, each of the automatic rope-untying mechanisms includes a first fixing plate, an L-shaped plate, a locking plate, a lifting lug, a first pin shaft, a second pin shaft, an electric push rod, a vertical plate, and a first roller; every two adjacent vertical plates are arranged vertically and horizontally side by side at intervals in the front and rear, and first rollers are vertically and parallelly arranged at positions slightly above the middle between the two. Each first roller is vertically rotatably connected to the corresponding two vertical plates along its axial direction, and each second steel wire rope passes through the corresponding first roller to lift the corresponding automatic rope-untying mechanism, and then the blade angle is adjusted through the winding action of the corresponding second hoist; on the lower surfaces of every two adjacent vertical plates, two first fixing plates are vertically and symmetrically arranged at intervals in the left and right directions, and a locking plate is horizontally arranged at a position slightly above the middle between every two adjacent first fixing plates on the side close to the blade. One end of each locking plate is vertically hinged to the corresponding two first fixing plates through a first pin shaft, and an electric push rod is vertically and obliquely arranged between the upper surface of the other end and the lower surface of the corresponding vertical plate. The tail part of each electric push rod is vertically hinged to the corresponding position on the lower surface of the corresponding vertical plate, and its telescopic end is vertically hinged to the upper surface of the corresponding locking plate. Driven by the electric push rod, each locking plate rotates vertically around the corresponding two first fixing plates; a limiting groove matching the L-shaped plate is vertically and recessedly opened at the middle position of the lower surface of each locking plate, and each limiting groove vertically penetrates through the corresponding locking plate upward; an L-shaped plate is vertically arranged at a position slightly below the middle between every two adjacent first fixing plates on the side close to the blade. Each L-shaped plate is arranged on the same side as the corresponding locking plate, and its rotation direction is the same as that of the corresponding locking plate; one end of the short side of each L-shaped plate is vertically hinged to the corresponding two first fixing plates through a second pin shaft, and the long side end of each L-shaped plate is vertically clamped into the limiting groove of the corresponding locking plate and is restricted from rotating downward by the corresponding locking plate; a connecting plate is vertically fixed at a position slightly above the side surface of every two adjacent first fixing plates away from the blade, and a lifting lug is vertically fixed on the side surface of each connecting plate away from the first fixing plate; one end of each nylon rope is fixedly connected to the corresponding lifting lug, and the other end of each nylon rope sequentially passes downward through the two lifting points on the side of the corresponding tray away from the blade, and then is sleeved upward on the short side of the corresponding L-shaped plate; the electric push rod drives the corresponding locking plate to rotate upward, disengages the long side end of the L-shaped plate from the limiting groove of the corresponding locking plate, the L-shaped plate rotates downward, disengages the other end of the nylon rope from the corresponding L-shaped plate, and then disengages from the lifting point of the corresponding tray as the automatic rope-untying mechanism rises, thereby completing the recycling of the tray.

[0013] The hoisting process of a hoisting system for an offshore wind turbine impeller according to the present invention is characterized in that it includes the following steps:

[0014] (1) First, move the blade transport ship to the side of the jack-up platform near its main crane and position it.

[0015] (2) Then, select the number of intermediate lifting beams to be installed according to the specifications of the impeller, and thus obtain the lifting beam assembly of the required length. Ensure that the main lifting beam is always located at the center of the lifting beam assembly, the left lifting beam is always located at the leftmost end of the lifting beam assembly, and the right lifting beam is always located at the rightmost end of the lifting beam assembly.

[0016] (3) Lift the hub through the main crane so that the hub is fixedly installed at the corresponding position on the deck of the jack-up platform through its mounting seat.

[0017] (4) Lift the lifting plate of the lifting beam assembly through the cooperation of the main crane and the first steel wire rope, and connect the two groups of first guy ropes of the first guy rope mechanism to the left-side guy point and the right-side guy point on the main lifting beam respectively.

[0018] (5) Horizontally arrange trays at the end stress point and the root stress point of the blade respectively. Then, connect the two lifting points on one side of the tray relative to the blade to the winding ends of the corresponding second winches through the second steel wire ropes respectively.

[0019] Then, fix one end of the nylon rope to the lifting ears of the corresponding automatic rope releasing mechanism respectively. After its other end passes through the two lifting points on the other side of the corresponding tray relative to the blade downward in sequence, it is then sleeved upward on the short sides of the L-shaped plates of the corresponding automatic rope releasing mechanism.

[0020] (6) Then, connect the first rollers of the two automatic rope releasing mechanisms to the winding ends of the corresponding second winches through the second steel wire ropes. At this time, the blade can be lifted through the cooperation of the main crane and the second winch and docked and screwed to the corresponding position of the hub. During this process, the angle of the blade is adjusted through the winding action of the second winch, and guying operations are carried out through the first guy rope mechanism.

[0021] (7) After the blade assembly is completed, the electric push rod drives the corresponding lock plate to rotate upward, causing the L-shaped plate to rotate downward, and the other end of the nylon rope is disengaged from the corresponding L-shaped plate. Then, it is disengaged from the lifting points of the corresponding tray as the automatic rope releasing mechanism rises, thereby completing the tray recovery. Then, repeat the above steps to install the other two blades until the impeller assembly is completed.

[0022] (8) After the impeller assembly is completed, remove the automatic rope releasing mechanism, and wind up the second steel wire rope through the second winch. Then, the second winch stops working.

[0023] (9) Connect the third steel wire rope of the front-side first hoist to the force-bearing point at the end of one of the blades, connect the third steel wire rope of the rear-side first hoist to the lifting point of the hub, and connect the second guy ropes of the two second guy rope mechanisms to the force-bearing points at the ends of the other two blades respectively; at this time, the impeller can be lifted by the cooperation of the main crane and the first hoist, and the impeller can be turned over by the winding action of the first hoist; during this process, the guy rope operation is carried out on the lifting beam assembly by the first guy rope mechanism, and the guy rope operation is carried out on the impeller by the second guy rope mechanism.

[0024] Advantages of the present invention:

[0025] (1) By the combined use of the main crane and the lifting beam assembly in the present invention, and with the auxiliary cooperation of the first guy rope mechanism and the second guy rope mechanism, the assembly and lifting of the impeller can be completed safely and efficiently. Furthermore, only a single crane is required during the assembly and lifting process of the impeller, greatly reducing cross-operation, enabling the jack-up platform to assemble larger impellers;

[0026] (2) By arranging the first guy rope mechanism and the second guy rope mechanism in the present invention, the stability during the assembly and lifting process of the impeller is improved, and the work efficiency is also greatly enhanced;

[0027] (3) By arranging the second guy rope mechanism on the lifting beam assembly in the present invention, there is no need to additionally arrange a guy rope system on the deck of the jack-up platform, which is flexible and convenient, and has a wide range of applications;

[0028] (4) The present invention can change the length of the lifting beam assembly by adding an intermediate lifting beam, so as to adapt to the assembly and lifting of impellers of different specifications, and has a wide range of applications;

[0029] (5) By arranging an automatic rope releasing mechanism in the present invention, manual rope releasing is not required, the work efficiency is improved, and the safety factor is high. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a schematic diagram of the assembly of the first blade of the present invention.

[0032] Figure 2 It is a schematic diagram of the hoisting of the second blade of the present invention.

[0033] Figure 3 It is a schematic diagram of the assembly of the second blade of the present invention.

[0034] Figure 4 It is a hoisting schematic diagram of the third blade of the present invention.

[0035] Figure 5 It is an assembly schematic diagram of the third blade of the present invention.

[0036] Figure 6 It is a hoisting schematic diagram of a single blade of the present invention.

[0037] Figure 7 It is a hoisting schematic diagram of the impeller of the present invention.

[0038] Figure 8 It is a structural schematic diagram of the lifting beam assembly of the present invention.

[0039] Figure 9 It is Figure 8 an enlarged schematic diagram of part A in

[0040] Figure 10 It is a structural schematic diagram of the main lifting beam of the present invention.

[0041] Figure 11 It is Figure 10 the B-B view in

[0042] Figure 12 It is a structural schematic diagram of the left lifting beam of the present invention.

[0043] Figure 13 It is a structural schematic diagram of the middle lifting beam of the present invention.

[0044] Figure 14 It is a structural schematic diagram of the right lifting beam of the present invention.

[0045] Figure 15 It is a structural schematic diagram of the second guy wire mechanism of the present invention.

[0046] Figure 16 It is a structural schematic diagram of the automatic rope releasing mechanism of the present invention.

[0047] Figure 17 It is Figure 16 a side view of

[0048] Among them, 1 - jack-up platform; 2 - blade; 3 - hub; 4 - suspension beam assembly; 5 - main hoist; 6 - first wire rope; 7 - first guy wire; 8 - automatic wire rope releasing mechanism; 9 - second guy wire mechanism; 10 - nylon rope; 11 - second wire rope; 12 - third wire rope; 401 - main suspension beam; 402 - first winch; 403 - hanging plate; 404 - Y-axis movement assembly; 405 - moving plate; 406 - counterweight; 407 - left flange; 408 - right flange; 409 - first rib plate; 410 - limit plate; 411 - second rib plate; 412 - left fixing plate; 413 - right fixing plate; 414 - strengthening plate; 415 - left suspension beam; 416 - right suspension beam; 417 - second winch; 418 - intermediate suspension beam; 81 - first fixing plate; 82 - L-shaped plate; 83 - locking plate; 84 - lifting lug; 85 - first pin shaft; 86 - second pin shaft; 87 - electric push rod; 88 - vertical plate; 89 - first roller; 901 - bottom plate; 902 - first rotating shaft; 903 - roller group; 904 - first bracket; 905 - drum; 906 - motor; 907 - second guy wire; 908 - second bracket; 909 - cylinder; 910 - pressing claw; 911 - pressing roller; 912 - rotating plate. Detailed implementation manner

[0049] The technical solution of the present invention will be clearly and completely described below through specific implementation manners.

[0050] A marine wind turbine impeller hoisting system of the present invention includes a jack-up platform 1, a blade 2 transport ship, a suspension beam assembly 4 and a second guy wire mechanism 9; the specific structure is as Figures 1 to 17 shown. Three blades 2 are installed in parallel on the blade 2 transport ship and are parked side by side on one side of the jack-up platform 1; a main hoist 5 is installed on the upper surface of the jack-up platform 1 on the side close to the blade 2 transport ship. The main hoist 5 is equipped with a first guy wire mechanism, and the first guy wire mechanism has 2 groups of first guy wires 7; second guy wire mechanisms 9 are symmetrically installed on the upper surface of the suspension beam assembly 4 near its two ends. The hub 3 is placed on the deck of the jack-up platform 1 through its mounting seat. Then, through the cooperation of the main hoist 5, the first guy wire mechanism and the suspension beam assembly 4, the three blades 2 are hoisted one by one and assembled with the hub 3 to form an impeller. Then, with the auxiliary cooperation of the second guy wire mechanism 9, the impeller is hoisted and turned over. In the present invention, the first guy wire mechanism is equipped by the main hoist 5 itself and is a conventional technology, so the structure of the first guy wire mechanism will not be described in detail here.

[0051] The lifting beam assembly 4 of the present invention includes a main lifting beam 401, a lifting plate 403, a left lifting beam 415, a right lifting beam 416, an intermediate lifting beam 418, a first hoist 402, a Y-axis movement assembly 404, a moving plate 405, a counterweight 406, a third steel wire rope 12, a second steel wire rope 11, a second hoist 417, a left flange 407, a right flange 408, a first rib plate 409, a second rib plate 411, a limiting plate 410, a left fixing plate 412, a right fixing plate 413 and a reinforcing plate 414; as Figures 6 to 15 shown, the main lifting beam 401, the left lifting beam 415, the right lifting beam 416 and the intermediate lifting beam 418 are all truss structures welded and spliced by four horizontal steel pipes, several inclined reinforcing pipes and several vertical reinforcing pipes, and their vertical cross-sections match respectively. The lengths of the left lifting beam 415, the right lifting beam 416 and the intermediate lifting beam 418 are the same, and the length of the main lifting beam 401 is greater than that of the left lifting beam 415; the left lifting beam 415, the main lifting beam 401 and the right lifting beam 416 are arranged horizontally and collinearly from left to right in sequence, and intermediate lifting beams 418 are also horizontally and collinearly arranged between the left lifting beam 415 and the main lifting beam 401, and between the main lifting beam 401 and the right lifting beam 416, and the left lifting beam 415, the intermediate lifting beam 418 on the left side, the main lifting beam 401, the intermediate lifting beam 418 on the right side and the right lifting beam 416 are respectively screwed and fixed to each other; on the upper surface of the main lifting beam 401, at the position of the left guy point and at the position of the right guy point, lifting plates 403 for lifting are respectively provided, and the lifting operation of the lifting beam assembly 4 is carried out through the cooperation of the lifting plates 403 with the main hoist 5 and the first guy mechanism.

[0052] as Figures 6 to 15As shown, a first winch 402 is symmetrically arranged at intervals in the front and back at the middle position of the inner top surface of the main lifting beam 401, and the third steel wire rope 12 is wound around the corresponding first winch 402, and it is ensured that the main lifting beam 401 does not interfere with the winding action of the first winch 402 through the third steel wire rope 12; a Y-axis movement component 404 is horizontally arranged longitudinally at the middle position of the inner bottom surface of the main lifting beam 401, and the moving plate 405 is horizontally arranged on the moving end of the Y-axis movement component 404, and moves horizontally longitudinally within the coverage range between the two first winches 402 inside the main lifting beam 401 through the Y-axis movement component 404; a counterweight 406 for adjusting the balance of the lifting beam assembly 4 is arranged on the upper surface of the moving plate 405, and the counterweight 406 moves horizontally longitudinally with the moving plate 405 and does not interfere with the winding actions of the two first winches 402 respectively; second winches 417 are symmetrically arranged at intervals in the front and back at the middle position on the left side of the inner top surface of the left lifting beam 415 and at the middle position on the right side of the inner top surface of the right lifting beam 416 respectively, and every two left and right second winches 417 are symmetrically arranged, and a second steel wire rope 11 is wound around each second winch 417, and it is ensured that the left lifting beam 415 and the right lifting beam 416 do not interfere with the winding actions of the corresponding second steel wire ropes 11 respectively. In the present invention, the Y-axis movement component 404 is an existing transmission structure and is controlled by a controller to accurately control the action of the Y-axis movement component 404 according to requirements, and then drive the counterweight 406 to move for balance adjustment of the lifting beam assembly 4. This is prior art known to those skilled in the art, so the structure of the Y-axis movement component 404 will not be described in detail here; in addition, the first winch 402 and the second winch 417 in this application are both prior art, so their structures will not be described in detail here.

[0053] As Figures 6 to 15As shown, matching left flanges 407 are respectively and fixedly attached to the left end faces of the four horizontal steel pipes of the main lifting beam 401, the left end faces of the four horizontal steel pipes of the intermediate lifting beam 418, and the left end faces of the four horizontal steel pipes of the right lifting beam 416. And matching right flanges 408 are respectively and fixedly attached to the right end faces of the four horizontal steel pipes of the main lifting beam 401, the right end faces of the four horizontal steel pipes of the intermediate lifting beam 418, and the right end faces of the four horizontal steel pipes of the left lifting beam 415. Then, through the screwing fit of the left flange 407 and the corresponding right flange 408, the left lifting beam 415, the intermediate lifting beam 418 on the left side, the main lifting beam 401, the intermediate lifting beam 418 on the right side, and the right lifting beam 416 are screwed and connected to each other. Between the right side face of each left flange 407 and the corresponding horizontal steel pipes of the corresponding main lifting beam 401, intermediate lifting beam 418, and right lifting beam 416, several first rib plates 409 are evenly spaced and vertically arranged in the circumferential direction around them, and the corresponding left flange 407 is fixed and strengthened by the first rib plates 409 respectively. Between the left side face of each right flange 408 and the corresponding horizontal steel pipes of the corresponding main lifting beam 401, intermediate lifting beam 418, and left lifting beam 415, several second rib plates 411 are evenly spaced and vertically arranged in the circumferential direction around them, and the corresponding right flange 408 is fixed and strengthened by the second rib plates 411 respectively. On the right side face of each right flange 408, several limiting plates 410 are evenly spaced and vertically arranged in the circumferential direction around it. Each limiting plate 410 is vertically arranged along the radial direction of the corresponding right flange 408, and all the limiting plates 410 on the same right flange 408 enclose a square area matching the corresponding left flange 407. Then, the docking of the left flange 407 and the corresponding right flange 408 is positioned by the limiting plates 410.

[0054] As Figures 6 to 15As shown in the figure, left fixing plates 412 are horizontally and fixedly attached to the upper and lower surfaces of the four horizontal steel pipes of the main lifting beam 401 at positions near their left ends, the upper and lower surfaces of the four horizontal steel pipes of the middle lifting beam 418 at positions near their left ends, and the upper and lower surfaces of the four horizontal steel pipes of the right lifting beam 416 at positions near their left ends. Each left fixing plate 412 is spaced on the right side of the corresponding left flange 407. Right fixing plates 413 that match the left fixing plates 412 are horizontally and fixedly attached to the upper and lower surfaces of the four horizontal steel pipes of the main lifting beam 401 at positions near their right ends, the upper and lower surfaces of the four horizontal steel pipes of the middle lifting beam 418 at positions near their right ends, and the upper and lower surfaces of the four horizontal steel pipes of the left lifting beam 415 at positions near their right ends. Each right fixing plate 413 is spaced on the left side of the corresponding right flange 408. Reinforcing plates 414 that match them are horizontally and fixedly attached between the outer surfaces of each left fixing plate 412 and the corresponding adjacent right fixing plate 413. Each reinforcing plate 414 is screwed and fixed to the corresponding left fixing plate 412 and right fixing plate 413 respectively. The thickness of the left fixing plate 412 is ensured so that each reinforcing plate 414 is spaced outside the corresponding right flange 408. Thus, through the cooperation of the reinforcing plate 414, left fixing plate 412, and right fixing plate 413, the joints between the left lifting beam 415, the middle lifting beam 418 on the left side, the main lifting beam 401, the middle lifting beam 418 on the right side, and the right lifting beam 416 are strengthened.

[0055] In the present invention, the second guy wire mechanism 9 on the left side is arranged on the upper surface of the left lifting beam 415 near the left side, and the second guy wire mechanism 9 on the right side is arranged on the upper surface of the right lifting beam 416 near the right side. Each second guy wire mechanism 9 includes a bottom plate 901, a first rotating shaft 902, a roller group 903, a first support 904, a second rotating shaft, a drum 905, a motor 906, a second guy wire rope 907, a rotating plate 912, a second support 908, a cylinder 909, a pressing claw 910, and a pressing roller 911. As Figures 6 to 15As shown in the figure, on the upper surface of the left suspension beam 415 near the left side and on the upper surface of the right suspension beam 416 near the right side, there are also horizontally and fittingly fixed bottom plates 901 respectively. And each bottom plate 901 does not interfere with the screw connection and fixation between the left suspension beam 415 and the corresponding middle suspension beam 418, nor with the screw connection and fixation between the right suspension beam 416 and the corresponding middle suspension beam 418. Each rotating plate 912 is horizontally and spacedly arranged on the upper surface of the corresponding bottom plate 901. And between each rotating plate 912 and the corresponding bottom plate 901, there is also a first rotating shaft 902 vertically and coaxially arranged, so that each rotating plate 912 can horizontally rotate freely around the axis of the corresponding first rotating shaft 902. On the upper surface of each bottom plate 901, relative to the position directly below the corresponding rotating plate 912, there is also connected a roller group 903 that abuts against the rotating plate 912. And several turns of the roller group 903 are all coaxially arranged with the corresponding first rotating shaft 902 and are all arranged on the outer ring of the first rotating shaft 902. Among them, each roller group 903 is conical, and its end close to the first rotating shaft 902 is the small end, and the other end is the large end, so as to adapt to the smaller linear velocity of the rotating plate 912 when it rotates closer to the first rotating shaft 902.

[0056] As Figures 6 to 15 shown in the figure, on the outer side of the upper surface of each rotating plate 912, there is also a first bracket 904 vertically arranged. And the upper end of each first bracket 904 is of a U-shaped structure. Each second rotating shaft is horizontally arranged inside the upper end of the corresponding first bracket 904, and its two ends are respectively rotationally connected to the two side surfaces of the upper end of the corresponding first bracket 904. One end of each second rotating shaft vertically extends out of the outer side surface of the corresponding first bracket 904 and is respectively linked to the output end of the corresponding motor 906 through a coupling. On each second rotating shaft, relative to the inside of the upper end of the first bracket 904, there is also a drum 905 coaxially sleeved and fixed. And on each drum 905, there is also a second guy rope 907 wound, so that under the drive of the motor 906, guying operation is carried out through the second guy rope 907.

[0057] As Figures 6 to 15As shown in the figure, on the upper surface of each rotating plate 912, a second support 908 is vertically provided on the other side relative to the first support 904. And at the upper end of each second support 908, a cylinder 909 is horizontally provided. The telescopic end of each cylinder 909 is horizontally arranged towards the corresponding roller 905 and is fixedly connected to the corresponding clamping jaw 910 respectively; each clamping jaw 910 is a vertically arranged triangular structure, and the end far from the roller 905 is fixedly connected to the telescopic end of the corresponding cylinder 909 respectively. The two sides of each clamping jaw 910 close to the roller 905 are arranged in the same vertical plane up and down, and a pressure roller 911 is coaxially rotatably sleeved thereon respectively. And the second guy rope 907 is respectively pressed and wound on the corresponding roller 905 through the pressure roller 911; each pressure roller 911 matches the inner circumferential surface of the corresponding roller 905, and its length corresponds to the longitudinal width of the inner circumferential surface of the corresponding roller 905, so as to prevent the second guy rope 907 from loosening through the pressure roller 911.

[0058] In the present invention, trays are also horizontally provided at the force application points at the end and the root of the blade 2 respectively, and the corresponding blade 2 is supported on the two trays for hoisting; as Figures 1 to 17 shown in the figure, the two lifting points on one side of each tray relative to the blade 2 are respectively connected to the winding end of the corresponding second winch 417 on the corresponding side through a second steel wire rope 11. And on the other side of each tray relative to the blade 2, an automatic rope releasing mechanism 8 and a nylon rope 10 are respectively provided. One end of each nylon rope 10 is fixedly connected to the corresponding automatic rope releasing mechanism 8 respectively, and the other end thereof passes downward through the two lifting points on the other side of the corresponding tray relative to the blade 2 in sequence, and then is sleeved upward on the rope releasing end of the corresponding automatic rope releasing mechanism 8 respectively; the upper end of each automatic rope releasing mechanism 8 is respectively connected to the winding end of the corresponding second winch 417 through a second steel wire rope 11. Thus, through the cooperation of the second winch 417, the main hoist 5 and the first guy rope mechanism, the blade 2 is docked and assembled with the hub 3, and then the rope is released through the rope releasing end of the automatic rope releasing mechanism 8, and the other end of the nylon rope 10 automatically disengages from the corresponding automatic rope releasing mechanism 8 and the tray. Thus, the tray can be recovered by separating from the blade 2 through the corresponding second steel wire rope 11.

[0059] Among them, each automatic rope releasing mechanism 8 includes a first fixing plate 81, an L-shaped plate 82, a locking plate 83, a lifting lug 84, a first pin shaft 85, a second pin shaft 86, an electric push rod 87, a vertical plate 88, a first roller 89; as Figure 6 、 Figure 16 、 Figure 17As shown, every two adjacent vertical plates 88 are arranged side by side vertically at intervals front and back, and first rollers 89 are vertically and parallelly arranged at positions slightly above the middle between them. Each first roller 89 is vertically rotatably connected to the corresponding two vertical plates 88 along its axial direction, and each second steel wire rope 11 passes through the corresponding first roller 89 to lift the corresponding automatic rope releasing mechanism 8, and then the angle of the blade 2 is adjusted through the winding action of the corresponding second winch 417; on the lower surfaces of every two adjacent vertical plates 88, two first fixing plates 81 are vertically and symmetrically arranged at intervals left and right, and a locking plate 83 is horizontally arranged at a position slightly above the middle between every two adjacent first fixing plates 81 on the side close to the blade 2. One end of each locking plate 83 is vertically hinged to the corresponding two first fixing plates 81 through a first pin shaft 85, and an electric push rod 87 is vertically and obliquely arranged between the upper surface of the other end and the lower surface of the corresponding vertical plate 88. The tail part of each electric push rod 87 is vertically hinged to the corresponding position on the lower surface of the corresponding vertical plate 88, and its telescopic end is vertically hinged to the upper surface of the corresponding locking plate 83. Driven by the electric push rod 87, each locking plate 83 rotates vertically around the corresponding two first fixing plates 81;

[0060] As Figure 6 , Figure 16 , Figure 17 shown, a limiting groove matching the L-shaped plate 82 is vertically and embeddedly opened at the middle position of the lower surface of each locking plate 83, and each limiting groove vertically penetrates through the corresponding locking plate 83 upward; an L-shaped plate 82 is vertically arranged at a position slightly below the middle between every two adjacent first fixing plates 81 on the side close to the blade 2. Each L-shaped plate 82 is arranged on the same side as the corresponding locking plate 83, and its rotation direction is consistent with that of the corresponding locking plate 83; one short side end of each L-shaped plate 82 is vertically hinged to the corresponding two first fixing plates 81 through a second pin shaft 86, and its long side end is vertically and upwardly clamped in the limiting groove of the corresponding locking plate 83, and its downward rotation is restricted by the corresponding locking plate 83; a connecting plate is vertically and fixedly arranged at a position slightly above the side surface of every two adjacent first fixing plates 81 far from the blade 2, and a lifting lug 84 is vertically and fixedly arranged on the side surface of each connecting plate far from the first fixing plate 81; one end of each nylon rope 10 is fixedly connected to the corresponding lifting lug 84, and its other end sequentially passes downward through the two lifting points on the other side of the corresponding tray relative to the blade 2, and then is sleeved upward on the short side of the corresponding L-shaped plate 82; in the present invention, the electric push rod 87 drives the corresponding locking plate 83 to rotate upward, disengages the long side end of the L-shaped plate 82 from the limiting groove of the corresponding locking plate 83, the L-shaped plate 82 rotates downward, disengages the other end of the nylon rope 10 from the corresponding L-shaped plate 82, and then disengages from the lifting points of the corresponding tray as the automatic rope releasing mechanism 8 rises, thereby completing the recovery of the tray.

[0061] The hoisting process of a hoisting system for an offshore wind turbine impeller according to the present invention is as follows Figures 1 to 7 shown, and includes the following steps:

[0062] (1) First, move the blade 2 transport ship to the side of the jack-up platform 1 near its main hoist 5 and position it.

[0063] (2) Then, select the installation quantity of the intermediate lifting beam 418 according to the specifications of the impeller, so as to obtain the lifting beam assembly 4 with the required length, and ensure that the main lifting beam 401 is always located at the center position of the lifting beam assembly 4, the left lifting beam 415 is always located at the leftmost end of the lifting beam assembly 4, and the right lifting beam 416 is always located at the rightmost end of the lifting beam assembly 4.

[0064] (3) Hoist the hub 3 by the main hoist 5, so that the hub 3 is fixedly installed at the corresponding position on the deck of the jack-up platform 1 through its mounting seat; the installation of the hub 3 of the present invention is the same as the existing installation method, so it will not be elaborated here.

[0065] (4) Lift the lifting plate 403 of the lifting beam assembly 4 by the cooperation of the main hoist 5 and the first steel wire rope 6, and connect the two groups of first guy ropes 7 of the first guy rope mechanism to the left-side guy point and the right-side guy point on the main lifting beam 401 respectively.

[0066] (5) Horizontally arrange trays at the end stress points and root stress points of the blade 2 respectively, and then connect the two lifting points on one side of the tray relative to the blade 2 to the winding ends of the corresponding second winches 417 through the second steel wire ropes 11 respectively;

[0067] Then, fix one end of the nylon rope 10 to the lifting lugs 84 of the corresponding automatic rope releasing mechanism 8 respectively, and after its other end passes through the two lifting points on the other side of the corresponding tray relative to the blade 2 downward in sequence, then sleeve it upward on the short sides of the L-shaped plates 82 of the corresponding automatic rope releasing mechanism 8 respectively.

[0068] (6) Then, connect the first rollers 89 of the two automatic rope releasing mechanisms 8 to the winding ends of the corresponding second winches 417 through the second steel wire ropes 11. At this time, the blade 2 can be hoisted by the cooperation of the main hoist 5 and the second winch 417 and docked and screwed to the corresponding position of the hub 3. During this process, the angle of the blade 2 is adjusted by the winding action of the second winch 417, and guying operation is carried out by the first guy rope mechanism.

[0069] (7) After the blade 2 is assembled, the electric push rod 87 drives the corresponding lock plate 83 to rotate upward, so that the L-shaped plate 82 rotates downward, and the other end of the nylon rope 10 is disengaged from the corresponding L-shaped plate 82, and then disengages from the lifting points of the corresponding tray as the automatic rope releasing mechanism 8 rises, thereby completing the recovery of the tray; then repeat the above steps to install the remaining two blades 2 until the impeller assembly is completed.

[0070] (8) After the impeller is assembled, remove the automatic rope release mechanism 8, and wind up the second steel wire rope 11 through the second hoist 417, and then the second hoist 417 stops working.

[0071] (9) Connect the third steel wire rope 12 of the front-side first hoist 402 to the stress point at the end of one of the blades 2, and connect the third steel wire rope 12 of the rear-side first hoist 402 to the lifting point of the hub 3, and connect the second guy ropes 907 of the two second guy rope mechanisms 9 to the stress points at the ends of the other two blades 2 respectively; at this time, the impeller can be lifted by the cooperation of the main crane 5 and the first hoist 402, and the impeller can be turned over by the winding action of the first hoist 402; during this process, the suspension beam assembly 4 is guyed by the first guy rope mechanism, and the impeller is guyed by the second guy rope mechanism 9.

[0072] Advantages of the present invention:

[0073] (1) By the combined use of the main crane 5 and the suspension beam assembly 4 in the present invention, and with the auxiliary cooperation of the first guy rope mechanism and the second guy rope mechanism 9, the assembly and lifting of the impeller can be completed safely and efficiently. Furthermore, only a single crane is required during the impeller assembly and lifting process, greatly reducing cross-operation, so that the jack-up platform 1 can assemble larger impellers;

[0074] (2) By setting the first guy rope mechanism and the second guy rope mechanism 9 in the present invention, the stability of the impeller assembly and lifting process is improved, and the work efficiency is also greatly enhanced;

[0075] (3) By setting the second guy rope mechanism 9 on the suspension beam assembly 4 in the present invention, there is no need to additionally set a guy rope system on the deck of the jack-up platform 1, which is flexible and convenient and has a wide application range;

[0076] (4) The present invention can change the length of the suspension beam assembly 4 by adding an intermediate suspension beam 418, so as to adapt to the assembly and lifting of impellers of different specifications, and has a wide application range;

[0077] (5) By setting the automatic rope release mechanism 8 in the present invention, manual rope release is not required, the work efficiency is improved, and the safety factor is high.

[0078] The above-described embodiments are only described as the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary engineering and technical personnel in the field to the technical solutions of the present invention should fall within the protection scope of the present invention. The technical content claimed by the present invention has been fully recorded in the claims.

Claims

1. An offshore wind turbine impeller hoisting system, characterized in that: The invention comprises a self-elevating platform, a blade transport ship, a hanging beam assembly and a second wind cable mechanism; three blades are installed in parallel on the blade transport ship and are docked in parallel on one side of the self-elevating platform; a main crane is installed on the upper surface of the self-elevating platform on the side close to the blade transport ship, the main crane is equipped with a first wind cable mechanism, and the first wind cable mechanism has two groups of first wind ropes; second wind cable mechanisms are also symmetrically installed on the upper surface of the hanging beam assembly at both ends, and the hub is placed on the deck of the self-elevating platform through its mounting seat, and then the three blades are lifted one by one and assembled into an impeller with the hub through the cooperation of the main crane, the first wind cable mechanism and the hanging beam assembly, and then the impeller is lifted and turned over with the assistance of the second wind cable mechanism.

2. The offshore wind turbine impeller hoisting system according to claim 1, characterized in that: The suspension beam assembly includes a main suspension beam, a suspension plate, a left suspension beam, a right suspension beam and an intermediate suspension beam; the main suspension beam, the left suspension beam, the right suspension beam and the intermediate suspension beam are all truss structures formed by welding and splicing four horizontal steel pipes, several inclined reinforcement pipes and several vertical reinforcement pipes, and their vertical cross-sections are matched respectively, the lengths of the left suspension beam, the right suspension beam and the intermediate suspension beam are consistent, and the length of the main suspension beam is greater than that of the left suspension beam; the left suspension beam, the main suspension beam and the right suspension beam are aligned horizontally in a straight line from left to right in sequence The left and right suspension beams are arranged in parallel, and intermediate suspension beams are arranged horizontally and in a straight line between the left suspension beam and the main suspension beam, and between the main suspension beam and the right suspension beam, and the left suspension beam, the intermediate suspension beam on the left side, the main suspension beam, the intermediate suspension beam on the right side and the right suspension beam are screwed and fixed to each other respectively; hanging plates for lifting are respectively arranged on the upper surface of the main suspension beam at the left and right cable wind points, and the lifting operation of the suspension beam assembly is carried out through the cooperation of the hanging plates, the main crane and the first cable wind mechanism.

3. The offshore wind turbine impeller hoisting system according to claim 2, characterized in that: It also includes a first winch, a Y-axis motion component, a moving plate, a counterweight, a third steel wire rope, a second steel wire rope and a second winch; a first winch is symmetrically arranged at a front-to-back interval in the middle position of the inner top surface of the main suspension beam, and the third steel wire rope is wound on the corresponding first winch, and it is ensured that the main suspension beam does not interfere with the winding action of the first winch through the third steel wire rope; a Y-axis motion component is also horizontally and longitudinally arranged in the middle position of the inner bottom surface of the main suspension beam, and the moving plate is horizontally arranged on the moving end of the Y-axis motion component, and is moved inside the main suspension beam relative to the covering range between the two first winches through the Y-axis motion component. The movable plate can move horizontally and longitudinally within the range; a counterweight for adjusting the balance of the hanging beam assembly is also provided on the upper surface of the movable plate, and the counterweight moves horizontally and longitudinally with the movable plate, and does not interfere with the winding action of the two first winches respectively; second winches are symmetrically provided front and back at the middle position on the left side of the inner top surface of the left hanging beam and at the middle position on the right side of the inner top surface of the right hanging beam, and each left and right second winches are symmetrically arranged, and a second steel wire rope is wound on each of the second winches, and it is ensured that the left hanging beam and the right hanging beam do not interfere with the winding action of the corresponding second steel wire rope.

4. The offshore wind turbine impeller hoisting system according to claim 2, characterized in that: The cam is a plurality of camshafts, each of which ... Several first ribs are evenly spaced and vertically arranged between the corresponding horizontal steel pipes of the suspension beam along the four directions, and the corresponding left flanges are fixed and strengthened by the first ribs; several second ribs are evenly spaced and vertically arranged between the left side surface of each right flange and the corresponding horizontal steel pipes of the main suspension beam, the middle suspension beam and the left suspension beam along the four directions, and the corresponding right flanges are fixed and strengthened by the second ribs; several limit plates are evenly spaced and vertically arranged on the right side surface of each right flange along the four directions, each of the limit plates is vertically arranged along the radial direction of the corresponding right flange, and all the limit plates on the same right flange enclose a square area matching the corresponding left flange, and then the left flange and the corresponding right flange are positioned by the limit plates.

5. The offshore wind turbine impeller hoisting system according to claim 4, characterized in that: It also includes a left fixed plate, a right fixed plate and a reinforcement plate; a left fixed plate is horizontally fitted and fixedly arranged at the upper and lower surfaces of the four horizontal steel tubes of the main suspension beam near its left end, at the upper and lower surfaces of the four horizontal steel tubes of the middle suspension beam near its left end, and at the upper and lower surfaces of the four horizontal steel tubes of the right suspension beam near its left end, and each of the left fixed plates is spaced apart on the right side of the corresponding left flange; a left fixed plate is horizontally fitted and fixedly arranged at the upper and lower surfaces of the four horizontal steel tubes of the main suspension beam near its right end, at the upper and lower surfaces of the four horizontal steel tubes of the middle suspension beam near its right end, and at the upper and lower surfaces of the four horizontal steel tubes of the left suspension beam near its right end, A right fixing plate matching the left fixing plate is fitted and fixedly provided, and each of the right fixing plates is spaced apart on the left side of the corresponding right flange; a reinforcing plate matching the left fixing plate is also horizontally fitted between the outer surface of each left fixing plate and the corresponding adjacent right fixing plate, and each of the reinforcing plates is respectively screwed and fixed to the corresponding left fixing plate and right fixing plate, and the thickness of the left fixing plate needs to ensure that each of the reinforcing plates is spaced apart on the outside of the corresponding right flange, and then through the cooperation of the reinforcing plate, the left fixing plate and the right fixing plate, the connections between the left hanging beam, the middle hanging beam on the left side, the main hanging beam, the middle hanging beam on the right side and the right hanging beam are strengthened.

6. The offshore wind turbine impeller hoisting system according to claim 3, characterized in that: The second wind cable mechanism on the left side is arranged on the left side of the upper surface of the left suspension beam, and the second wind cable mechanism on the right side is arranged on the right side of the upper surface of the right suspension beam; each of the second wind cable mechanisms includes a base plate, a first rotating shaft, a roller group, a first bracket, a second rotating shaft, a roller, a motor, a second wind rope and a rotating plate; a base plate is also horizontally fixed on the left side of the upper surface of the left suspension beam and the right side of the upper surface of the right suspension beam, and each of the base plates does not interfere with the screw connection between the left suspension beam and the corresponding middle suspension beam, and the screw connection between the right suspension beam and the corresponding middle suspension beam; each of the rotating plates is horizontally spaced and arranged on the upper surface of the corresponding base plate, and a first rotating shaft is also vertically coaxially arranged between each of the rotating plates and the corresponding base plate, so that each rotating plate can rotate horizontally freely around the axial direction of the corresponding first rotating shaft; a roller group with several circles abutting against the rotating plate is also connected to the upper surface of each of the base plates relative to the corresponding rotating plate directly below, and The roller groups of several circles are all arranged coaxially with the corresponding first rotating shaft, and are all arranged on the outer ring of the first rotating shaft. Each of the roller groups is conical, and one end close to the first rotating shaft is a small end, and the other end is a large end, so as to adapt to the smaller linear speed close to the first rotating shaft when the rotating plate rotates; a first bracket is also vertically arranged on the outer side of the upper surface of each rotating plate, and the upper end of each first bracket is a U-shaped structure; each of the second rotating shaft is horizontally arranged in the upper end of the corresponding first bracket, and its two ends are respectively rotatably connected to the two side surfaces of the upper end of the corresponding first bracket; one end of each of the second rotating shaft vertically extends out of the outer side surface of the corresponding first bracket, and is respectively linked to the output end of the corresponding motor through a coupling; on each of the second rotating shaft, a roller is also coaxially sleeved and fixed relative to the inner side of the upper end of the first bracket, and a second cable wind rope is also wound on each of the rollers, and then under the drive of the motor, cable wind operation is performed through the second cable wind rope.

7. The offshore wind turbine impeller hoisting system according to claim 6, characterized in that: They also include a second bracket, a cylinder, a pressure claw and a pressure roller; a second bracket is vertically arranged on the other side of the upper surface of each rotating plate relative to the first bracket, and a cylinder is horizontally arranged on the upper end of each second bracket, and the telescopic end of each cylinder is horizontally arranged toward the corresponding roller and is respectively fixedly connected to the corresponding pressure claw; each pressure claw is a vertically arranged triangular structure, and its end away from the roller is respectively fixedly connected to the telescopic end of the corresponding cylinder, and each pressure claw is arranged in the same vertical plane on both sides close to the roller, and pressure rollers are respectively coaxially rotatably sleeved thereon, and the second cable wind rope is respectively pressed and wound around the corresponding roller through the pressure rollers; each pressure roller matches the inner circumference of the corresponding roller, and its length corresponds to the longitudinal width of the inner circumference of the corresponding roller, thereby preventing the second cable wind rope from loosening through the pressure roller.

8. The offshore wind turbine impeller hoisting system according to claim 7, characterized in that: Pallets are also horizontally provided at the end force points of the blades and the root force points thereof, and the corresponding blades are supported on the two pallets for hoisting; the two lifting points of each pallet relative to one side of the blade are respectively connected to the winding end of the second hoist on the corresponding side through a second steel wire rope, and an automatic untying mechanism and a nylon rope are respectively provided on the other side of each pallet relative to the blade, one end of each nylon rope is respectively fixedly connected to the corresponding automatic untying mechanism, and the other end thereof passes through the two lifting points of the corresponding pallet relative to the other side of the blade in sequence downward, and then is respectively sleeved upward on the untying end of the corresponding automatic untying mechanism; the upper end of each automatic untying mechanism is respectively connected to the winding end of the second hoist on the corresponding side through a second steel wire rope, and then the blade is docked and assembled with the hub through the cooperation of the second hoist, the main hoist and the first cable wind mechanism, and then the rope is untied through the untying end of the automatic untying mechanism, and the other end of the nylon rope is automatically detached from the corresponding automatic untying mechanism and the pallet, so that the pallet can be detached from the blade through the corresponding second steel wire rope for recovery.

9. The offshore wind turbine impeller hoisting system according to claim 8, characterized in that: Each of the automatic rope-releasing mechanisms comprises a first fixed plate, an L-shaped plate, a locking plate, a lifting ear, a first pin shaft, a second pin shaft, an electric push rod, a vertical plate, and a first roller; each of the two adjacent vertical plates are arranged in parallel vertically and horizontally at a front-to-back interval, and a first roller is vertically and parallelly arranged in the middle and upper position between the two, each of the first rollers is vertically rotatably connected with the corresponding two vertical plates along its axial direction, and each of the second steel wire ropes passes through the corresponding first roller to lift the corresponding automatic rope-releasing mechanism, and then the blade angle is adjusted by the winding action of the corresponding second winch; two vertical and longitudinal symmetrical ones are arranged on the lower surface of each of the two adjacent vertical plates at a left-right interval. A first fixed plate, and a locking plate is horizontally provided at a middle upper position between each adjacent two first fixed plates and close to a blade side, one end of each of the locking plates is vertically hinged with the corresponding two first fixed plates through a first pin shaft, and an electric push rod is vertically inclined between the upper surface of the other end and the lower surface of the corresponding vertical plate, the tail of each electric push rod is vertically hinged with the corresponding position of the lower surface of the corresponding vertical plate, and its telescopic end is vertically hinged with the upper surface of the corresponding lock plate, and each of the lock plates is vertically rotated around the corresponding two first fixed plates under the drive of the electric push rod; a vertical push rod is also vertically provided in the middle position of the lower surface of each lock plate. The lock plate is embedded with a limiting groove matching the L-shaped plate, and each limiting groove vertically penetrates the corresponding locking plate vertically upward; an L-shaped plate is also vertically provided at the lower middle position between each adjacent two first fixing plates, close to the blade side, and each L-shaped plate is arranged on the same side as the corresponding locking plate, and its rotation direction is consistent with the rotation direction of the corresponding locking plate; one end of the short side of each L-shaped plate is vertically hinged to the corresponding two first fixing plates through a second pin shaft, and one end of its long side is vertically clamped in the limiting groove of the corresponding locking plate, and its downward rotation is restricted by the corresponding locking plate; when each adjacent two first fixing plates are away from the blade A connecting plate is also vertically fixed at an upper position of one side surface, and a lifting ear is also vertically fixed on a side surface of each connecting plate away from the first fixed plate; one end of each nylon rope is fixedly connected to the corresponding lifting ear, and the other end thereof passes downward in sequence through the two lifting points of the corresponding pallet on the other side of the blade, and then is upwardly sleeved on the corresponding short sides of the L-shaped plate; the electric push rod drives the corresponding locking plate to rotate upward, disengaging one end of the long side of the L-shaped plate from the limiting groove of the corresponding locking plate, and the L-shaped plate rotates downward, and the other end of the nylon rope is disengaged from the corresponding L-shaped plate, and then is disengaged from the lifting point of the corresponding pallet as the automatic rope untying mechanism rises, thereby completing the pallet recovery.

10. The hoisting process of the offshore wind turbine impeller hoisting system according to claim 9, characterized in that The following steps are involved: (1) First, the blade transport ship moves to the side of the jack-up platform close to its main crane and then positions itself; (2) Then, the number of intermediate suspension beams to be installed is selected according to the specifications of the impeller, thereby obtaining a suspension beam assembly of the required length, and ensuring that the main suspension beam is always located at the center of the suspension beam assembly, the left suspension beam is always located at the leftmost end of the suspension beam assembly, and the right suspension beam is always located at the rightmost end of the suspension beam assembly; (3) hoisting the wheel hub by the main crane so that the wheel hub is fixedly mounted at a corresponding position on the deck of the jack-up platform through its mounting seat; (4) The hanging plate of the hanging beam assembly is lifted by the cooperation of the main crane and the first steel wire rope, and the two groups of first wind ropes of the first wind rope mechanism are respectively connected to the left wind rope point and the right wind rope point on the main hanging beam; (5) A tray is horizontally provided at the end force bearing point and the root force bearing point of the blade, and two lifting points of the tray relative to one side of the blade are connected to the winding end of the second winch on the corresponding side through a second steel wire rope; Then, one end of the nylon rope is fixedly connected to the lifting lug of the corresponding automatic untying mechanism, and the other end of the nylon rope is passed through the two lifting points of the corresponding tray on the other side of the blade in sequence, and then upwardly sleeved on the short side of the L-shaped plate of the corresponding automatic untying mechanism; (6) Then, the first rollers of the two automatic untying mechanisms are connected to the winding end of the second hoist on the corresponding side through the second steel wire rope. At this time, the blades can be lifted by the cooperation of the main crane and the second hoist and connected with the corresponding position of the hub by screw connection. In this process, the angle of the blades is adjusted by the winding action of the second hoist, and the first cable wind mechanism is used for cable wind operation. (7) After the blades are assembled, the electric push rod drives the corresponding lock plate to rotate upward, causing the L-shaped plate to rotate downward, and the other end of the nylon rope is detached from the corresponding L-shaped plate, and then detached from the corresponding pallet lifting point as the automatic rope release mechanism rises, thereby completing the pallet recovery; then repeat the above steps to install the remaining two blades until the impeller assembly is completed; (8) After the impeller is assembled, the automatic rope unwinding mechanism is removed, and the second wire rope is wound up by the second winch, and then the second winch stops working; (9) Connect the third steel wire rope of the first hoist on the front side to the end force point of one of the blades, and connect the third steel wire rope of the first hoist on the rear side to the lifting point of the hub, and connect the second wind ropes of the two second wind cable mechanisms to the end force points of the other two blades respectively; at this time, the impeller can be lifted by the cooperation of the main crane and the first hoist, and the impeller can be turned over by the winding action of the first hoist; in this process, the lifting beam assembly is cabled by the first wind cable mechanism, and the impeller is cabled by the second wind cable mechanism.

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