CN111847268A

CN111847268A - Hoisting device for offshore wind turbine maintenance

Info

Publication number: CN111847268A
Application number: CN202010474415.8A
Authority: CN
Inventors: 毛炳坤; 霍小剑; 覃刚; 何鹏; 赵世琏
Original assignee: Wuhan Marine Machinery Plant Co Ltd
Current assignee: Wuhan Marine Machinery Plant Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-10-30
Anticipated expiration: 2040-05-29
Also published as: CN111847268B

Abstract

The utility model provides a hoisting apparatus for offshore wind turbine maintenance belongs to ocean mechanical equipment technical field. The hoisting device is connected to a tower drum of the offshore wind driven generator through a tower drum connecting component on the tower drum connecting base. Every rotation leg all includes coplanar first dwang, second dwang and bracing piece in the portal rotates, has first pulley and second pulley on second dwang and the bracing piece respectively. A steel wire rope of the hoisting winch sequentially bypasses the first pulley and the second pulley, the two ends of a first telescopic cylinder in the geometric triangular driving assembly can be connected with a tower cylinder to connect the base and the first rotating rod, and the two ends of a second telescopic cylinder are connected with a supporting rod and a second rotating rod. The first telescopic cylinder and the second telescopic rod are telescopic, the rotating gantry can rotate to different degrees, and the lifting device has the advantages of simple structure and lower required maintenance cost for lifting gear boxes and blades at different positions in an engine room of the offshore wind turbine.

Description

Hoisting device for offshore wind turbine maintenance

Technical Field

The disclosure relates to the technical field of marine mechanical equipment, in particular to a hoisting device for offshore wind turbine maintenance.

Background

An offshore wind turbine is also called an offshore wind turbine, is a power machine for converting wind energy into mechanical work, and is also a common power generation device. The offshore wind driven generator at least comprises a tower barrel, a machine room and a blade rotor, wherein the top of the tower barrel is provided with the machine room, a generator and a gear box which are in transmission connection are arranged in the machine room, and an output shaft of the gear box is connected with the blades.

The offshore wind turbine is usually installed at sea, and blades, a gearbox and the like in the offshore wind turbine are prone to being broken down by external factors, so that the blades and the gearbox in the offshore wind turbine need to be periodically maintained. When blades and a gear box in an offshore wind turbine are maintained, large ships such as a wind power installation ship and the like are often required to be moved, a crane on the large ships such as the wind power installation ship and the like is used for taking down the blades and the gear box in the wind turbine, and finally the blades and the gear box after maintenance or replacement are lifted to the top of a tower barrel through the crane for installation. However, a large vessel such as a wind turbine installation vessel is required to be used each time the offshore wind turbine is repaired or replaced, which results in high cost for periodic maintenance of the blades and the gear box of the offshore wind turbine.

Disclosure of Invention

The embodiment of the disclosure provides a hoisting device for offshore wind turbine maintenance, which can reduce the cost required by the regular maintenance of blades and a gearbox in an offshore wind turbine. The technical scheme is as follows:

the embodiment of the disclosure provides a hoisting device for offshore wind turbine maintenance, which comprises a tower drum connecting base, a rotating portal frame, a lifting winch and a driving assembly, wherein a tower drum connecting assembly is arranged on the tower drum connecting base,

the rotary portal frame comprises a cross beam, two parallel relative rotary legs, a first pulley and a second pulley, wherein two ends of the cross beam are respectively connected with the two rotary legs, each rotary leg comprises a first rotary rod, a second rotary rod and a support rod which are coplanar, the first end of the first rotary rod is hinged with the tower drum connecting base, the second end of the first rotary rod is hinged with the first end of the second rotary rod, the second end of the second rotary rod is fixed with one end of the cross beam, the first end of the support rod is fixed at the middle part of the first rotary rod, the first pulley is connected with the second end of the support rod in a rolling manner, the second pulley is connected with the second end of the second rotary rod in a rolling manner, the axis of the first pulley is parallel to the axis of the second pulley, and the axis of the first pulley is perpendicular to the plane where the rotary legs are located,

The lifting winch is arranged on the tower drum connecting base, a steel wire rope of the lifting winch sequentially bypasses the first pulley and the second pulley,

the drive assembly all includes coplane first telescoping cylinder and second telescoping cylinder, the first end of first telescoping cylinder with the tower section of thick bamboo is connected the base and is articulated, the second end of first telescoping cylinder with first dwang is articulated, the first end of second telescoping cylinder with the bracing piece is articulated, the second end of second telescoping cylinder with the second dwang is articulated.

Optionally, the tower connection base includes a first surface and a second surface parallel and opposite to each other, the first surface, the rotating gantry and the driving assembly are disposed on the first surface, and the hoisting winch is disposed on the second surface.

Optionally, hoisting apparatus still includes the support assembly pulley, the support assembly pulley is in including rolling the setting first support pulley and the second support pulley on the first surface, the axis of first support pulley with the axis of second support pulley all is on a parallel with the axis of first pulley, the terminal surface of first support pulley with the terminal surface of second support pulley is in the coplanar, just first support pulley with the second support pulley is located the both sides of first flexible hydro-cylinder, first support pulley with the second support pulley is used for supplying after wire rope walks around, walk around in proper order again first pulley with the second pulley.

Optionally, the support pulley block further includes a third support pulley with an axis parallel to the axis of the first support pulley, the third support pulley is arranged on the edge of the first surface in a rolling manner, and the third support pulley is used for allowing the steel wire rope to pass around and then sequentially pass around the first pulley and the second pulley.

Optionally, each of the rotating legs further includes a first reinforcing rod, a first end of the first reinforcing rod is fixed to the first rotating rod, and a second end of the first reinforcing rod is fixedly connected to the second end of the supporting rod.

Optionally, the second end of the second telescopic cylinder is hinged to the middle of the supporting rod, each rotating leg further comprises a second reinforcing rod, the second end of the second reinforcing rod is fixed to the first end of the first rotating rod, and the second end of the second reinforcing rod is fixedly connected to the middle of the supporting rod.

Optionally, the hoisting device includes two hoisting winches, the wire rope of one of the hoisting winches sequentially passes around the first pulley and the second pulley on one of the rotating legs, and the wire rope of the other of the hoisting winches sequentially passes around the first pulley and the second pulley on the other of the rotating legs.

Optionally, the hoisting device further comprises an intermediate hoisting assembly, the intermediate hoisting assembly comprises a lifting plate and a lifting hook, the lifting plate is located between the cross beam and the two rotating legs, the lifting hook is fixedly connected with the lifting plate, one of the steel wire ropes of the hoisting winch bypasses one of the ends of the second pulleys on the rotating legs, the other of the ends of the second pulleys on the rotating legs, and the steel wire ropes of the two hoisting winches are all arranged on the lifting plate.

Optionally, the intermediate lifting assembly further comprises a first intermediate pulley, a second intermediate pulley, a third intermediate pulley, a first movable pulley and a second movable pulley, wherein axes of the first intermediate pulley, the second intermediate pulley, the third intermediate pulley, the first movable pulley and the second movable pulley are parallel to each other. The first intermediate pulley, the second intermediate pulley and the third intermediate pulley are arranged on the cross beam at intervals, the axis of the first intermediate pulley is vertical to the axis of the first pulley, the first movable pulley and the second movable pulley are arranged on the lifting plate at intervals,

and after the steel wire rope of one lifting winch bypasses one second pulley on the rotating leg, the steel wire rope of the other lifting winch bypasses the other second pulley on the rotating leg, the steel wire rope of the other lifting winch bypasses the third intermediate pulley, the second movable pulley and the second intermediate pulley, and the tail ends of the steel wire ropes of the two lifting winches are connected.

Optionally, the tower tube connecting assembly includes an annular tube, a plurality of compact lumps and a plurality of driving pieces that correspond to the compact lumps one to one, the annular tube is used for coaxial cover to establish on a tower tube, be provided with a plurality of mounting holes in the circumference of the annular tube, a plurality of compact lumps one to one set up in a plurality of mounting holes, a plurality of driving pieces set up on the annular tube, just a plurality of driving pieces with a plurality of compact lumps one to one are connected, every the driving piece is used for driving the correspondence the compact lumps follow the radial movement of the annular tube.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:

the hoisting device comprises a tower cylinder connecting base, a rotating portal frame, a lifting winch and a driving assembly, wherein a tower cylinder connecting assembly is arranged on the tower cylinder connecting base. The hoisting device can be connected to the tower of the offshore wind turbine through the tower connecting component on the tower connecting base. In the rotating portal frame, two ends of a cross beam are respectively connected with two rotating legs, each rotating leg comprises a first rotating rod, a second rotating rod and a supporting rod which are coplanar, the first end of the first rotating rod is hinged with a tower cylinder connecting base, the second end of the first rotating rod is hinged with the first end of the second rotating rod, the second end of the second rotating rod is fixed with one end of the cross beam, and the first end of the supporting rod is fixed in the middle of the first rotating rod. The first pulley is connected with the second end of the supporting rod in a rolling mode, the second pulley is connected with the second end of the second rotating rod in a rolling mode, the axis of the first pulley is parallel to the axis of the second pulley, and the axis of the first pulley is perpendicular to the plane where the rotating legs are located. The steel wire rope of the hoisting winch arranged on the tower drum connecting base sequentially bypasses the first pulley and the second pulley, a geometric triangle can be formed among the steel wire rope, the second rotating rod and the supporting rod, and the steel wire rope can ensure the stability of the upper part of the portal frame when the blades or the gear box are hoisted. The driving assembly comprises a first telescopic cylinder and a second telescopic cylinder which are coplanar, the first end of the first telescopic cylinder is hinged to the tower drum connecting base, the second end of the first telescopic cylinder is hinged to the first rotating rod, the first end of the second telescopic cylinder is hinged to the supporting rod, and the second end of the second telescopic cylinder is hinged to the second rotating rod. First telescoping cylinder and second telescopic link can be realized supporting the enhancement and rotate portal stability to first dwang and second dwang when, first telescoping cylinder stretches out and draws back with the second telescopic link, then can control the relative tower section of thick bamboo of first dwang respectively and connect the base, first dwang rotates relative first dwang, wire rope on the second pulley that is located second dwang second end also can rotate different positions, the holistic focus of portal is rotated in the adjustment, in order to promote the gear box that is located the different positions in cabin and blade, and rotate the portal and can not receive too big and damage. Overall structure is simple, can the direct mount on a tower section of thick bamboo, can realize the promotion of the gear box that is in different positions in offshore wind turbine's the cabin and blade simultaneously, and offshore wind turbine maintains or changes all need to use this kind of large-scale boats and ships of wind power installation ship once relatively at every turn, and required maintenance cost is lower.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a hoisting device for offshore wind turbine maintenance according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a steel cable provided by an embodiment of the present disclosure in a first winding state;

fig. 3 is a schematic structural diagram of a steel cable provided by an embodiment of the present disclosure in a second winding state;

fig. 4 is a front view of a lifting device provided by an embodiment of the present disclosure;

fig. 5 is a simplified schematic diagram of a steel cord winding state provided by an embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a tower coupling assembly provided by embodiments of the present disclosure;

fig. 7 is an installation schematic diagram of a hoisting device provided by the embodiment of the disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a hoisting device for offshore wind turbine maintenance according to an embodiment of the present disclosure. As can be seen from fig. 1, the present disclosure provides a lifting apparatus for offshore wind turbine maintenance, which includes a tower connection base 1, a rotating gantry 2, a lifting winch 3 and a driving assembly 4, wherein a tower connection assembly 11 is disposed on the tower connection base 1.

The revolving gantry 2 comprises a cross beam 21, two parallel opposite revolving legs 22, a first pulley 23 and a second pulley 24. The two ends of the cross beam 21 are respectively connected with the two rotating legs 22, each rotating leg 22 comprises a first rotating rod 221, a second rotating rod 222 and a supporting rod 223 which are coplanar, the first end of the first rotating rod 221 is hinged with the tower connecting base 1, the second end of the first rotating rod 221 is hinged with the first end of the second rotating rod 222, the second end of the second rotating rod 222 is fixed with one end of the cross beam 21, the first end of the supporting rod 223 is fixed in the middle of the first rotating rod 221, the first pulley 23 is connected with the second end of the supporting rod 223 in a rolling manner, the second pulley 24 is connected with the second end of the second rotating rod 222 in a rolling manner, the axis of the first pulley 23 is parallel to the axis of the second pulley 24, and the axis of the first pulley 23 is perpendicular to the plane where the rotating. The hoisting winch 3 is arranged on the tower connecting base 1, and a steel wire rope 31 of the hoisting winch 3 sequentially rounds the first pulley 23 and the second pulley 24.

The driving assemblies 4 respectively comprise a first telescopic cylinder 41 and a second telescopic cylinder 42 which are coplanar, a first end of the first telescopic cylinder 41 is hinged to the tower connecting base 1, a second end of the first telescopic cylinder 41 is hinged to the first rotating rod 221, a first end of the second telescopic cylinder 42 is hinged to the supporting rod 223, and a second end of the second telescopic cylinder 42 is hinged to the second rotating rod 222.

The hoisting device comprises a tower cylinder connecting base 1, a rotating portal frame 2, a lifting winch 3 and a driving assembly 4, wherein a tower cylinder connecting assembly 11 is arranged on the tower cylinder connecting base 1. The hoisting device may be connected to the tower 100 of the offshore wind turbine via a tower connection assembly 11 on the tower connection base 1. In the rotating portal frame 2, two ends of the cross beam 21 are respectively connected with the two rotating legs 22, each rotating leg 22 comprises a first rotating rod 221, a second rotating rod 222 and a supporting rod 223 which are coplanar, a first end of the first rotating rod 221 is hinged with the tower drum connecting base 1, a second end of the first rotating rod 221 is hinged with a first end of the second rotating rod 222, a second end of the second rotating rod 222 is fixed with one end of the cross beam 21, and a first end of the supporting rod 223 is fixed in the middle of the first rotating rod 221. The first pulley 23 is connected with the second end of the support rod 223 in a rolling way, the second pulley 24 is connected with the second end of the second rotating rod 222 in a rolling way, the axis of the first pulley 23 is parallel to the axis of the second pulley 24, and the axis of the first pulley 23 is perpendicular to the plane of the rotating leg 22. The steel wire 31 of the hoisting winch 3 arranged on the tower connecting base 1 sequentially rounds the first pulley 23 and the second pulley 24, a geometric triangle can be formed among the steel wire 31, the second rotating rod 222 and the support rod 223, and the steel wire 31 can ensure the stability of the upper part of the gantry when the blade 300 or the gear box 400 is hoisted. The driving assembly 4 comprises a first telescopic cylinder 41 and a second telescopic cylinder 42 which are coplanar, a first end of the first telescopic cylinder 41 is hinged to the tower connecting base 1, a second end of the first telescopic cylinder 41 is hinged to the first rotating rod 221, a first end of the second telescopic cylinder 42 is hinged to the supporting rod 223, and a second end of the second telescopic cylinder 42 is hinged to the second rotating rod 222. The first telescopic cylinder 41 and the second telescopic rod can support and strengthen the stability of the rotating portal frame 2 for the first rotating rod 221 and the second rotating rod 222, the first telescopic cylinder 41 and the second telescopic rod can stretch and retract, the first rotating rod 221 can be controlled to be connected with the base 1 relative to the tower, the first rotating rod 221 can rotate relative to the first rotating rod 221, the steel wire ropes 31 on the second pulleys 24 at the second end of the second rotating rod 222 can also rotate to different positions, the integral gravity center of the rotating portal frame 2 is adjusted, so that the gear boxes 400 and the blades 300 at different positions of the engine room 200 can be lifted, and the rotating portal frame 2 cannot be damaged due to overlarge stress. The overall structure is simple, the wind power generator can be directly mounted on the tower barrel 100, meanwhile, the gear boxes 400 and the blades 300 which are positioned at different positions in the engine room 200 of the offshore wind power generator can be lifted, and compared with a large ship such as a wind power installation ship, which is needed for maintenance or replacement of the offshore wind power generator every time, the maintenance cost is low.

In addition, when the lifting device in the present disclosure lifts the blades 300 and the gearbox 400, the blades 300 and the gearbox 400 located at different positions of the nacelle 200 can be stably lifted only by adjusting the rotation amplitude of the rotating gantry 2. The first telescopic cylinder 41 and the second telescopic cylinder 42 support the rotating leg 22, and the wire rope 31 on the first pulley 23 and the second pulley 24 is matched with the geometric triangle formed by the second rotating rod 222 and the support rod 223, so that the process of lifting the blade 300 and the gear box 400 by the rotating gantry 2 is more stable. Compared with the traditional mode, when the crane on the wind power installation vessel is used for lifting, the whole crane needs to be controlled to adjust the position of the arm support twice to lift the gear box 400 and the blades 300, and the required maintenance cost is lower.

Referring to FIG. 1, the tower attachment base 1 may include a first surface 1a and a second surface 1b parallel and opposite to each other, the first surface 1a, the rotating gantry 2 and the drive assembly 4 being disposed on the first surface 1a, and the hoisting winch 3 being disposed on the second surface 1 b.

The tower drum connecting base 1 is arranged to comprise a first surface 1a and a second surface 1b which are parallel and opposite to each other, the rotating portal frame 2 and the driving assembly 4 are arranged on the first surface 1a, the lifting winch 3 is arranged on the second surface 1b, the mounting space required by the whole hoisting device can be reduced, the manufacturing cost of the hoisting device can also be reduced, the gravity center of the whole hoisting device can be centralized, and the whole hoisting device can be conveniently mounted. When the steel wire rope 31 of the hoisting winch 3 is wound on the rotating gantry 2, the steel wire rope 31 abuts against the edge of the tower drum connecting base 1, the tower drum connecting base 1 can bear part of acting force from the steel wire rope 31, part of the acting force from the steel wire rope 31 borne by the rotating gantry 2 is shared, and stable work of the rotating gantry 2 is guaranteed.

Referring to fig. 1, the hoisting device may further include a supporting pulley block 5, the supporting pulley block 5 includes a first supporting pulley 51 and a second supporting pulley 52 that are rolling-disposed on the first surface 1a, an axis of the first supporting pulley 51 and an axis of the second supporting pulley 52 are both parallel to an axis of the first pulley 23, an end surface of the first supporting pulley 51 and an end surface of the second supporting pulley 52 are in the same plane, the first supporting pulley 51 and the second supporting pulley 52 are located at two sides of the first telescopic cylinder, and the first supporting pulley 51 and the second supporting pulley 52 are used for allowing the steel wire rope 31 to pass around and then sequentially pass around the first pulley 23 and the second pulley 24.

The end face of the first supporting pulley 51 and the end face of the second supporting pulley 52 are in the same plane, the first supporting pulley 51 and the second supporting pulley 52 are used for enabling the steel wire rope 31 to pass by and then sequentially pass by the first pulley 23 and the second pulley 24, the first supporting pulley 51 and the second supporting pulley 52 can share acting force on the steel wire rope 31, and the risk that the steel wire rope 31 is broken due to overlarge bearing capacity is reduced. The first supporting pulley 51 and the second supporting pulley 52 are located on two sides of the first telescopic cylinder, and can also share the acting force borne by the rotating gantry 2, so that the acting force required to be borne by the second telescopic cylinder 42 for supporting the rotating gantry 2 is reduced, and the stable work of the rotating gantry 2 and the driving assembly 4 is ensured.

Illustratively, the tower connecting base 1 may also be provided with through holes. The steel wire 31 can pass through the through hole on the sleeve connecting base, so that mutual friction between the steel wire 31 and the tower connecting base 1 is avoided.

Optionally, the supporting pulley block 5 may further include a third supporting pulley 53 having an axis parallel to the axis of the first supporting pulley 51, the third supporting pulley 53 is disposed on the edge of the first surface 1a in a rolling manner, and the third supporting pulley 53 is used for passing the wire rope 31 and then sequentially passing the first pulley 23 and the second pulley 24.

The steel wire rope 31 is wound around the third rear supporting pulley 53 arranged on the edge of the first surface 1a and then sequentially wound around the first pulley 23 and the second pulley 24, and the third supporting pulley 53 can avoid mutual friction between the steel wire rope 31 and the tower connection base 1, so that stable use of the steel wire rope 31 is ensured.

Illustratively, the end surface of the third supporting pulley 53 may also be in the same plane as the end surface of the first supporting pulley 51, and the third supporting pulley 53 and the second supporting pulley 52 are disposed on both sides of the first supporting pulley 51.

When the third supporting pulley 53 is in such an arrangement, the wire rope 31 of the hoisting winch 3 may have a first winding state and a second winding state, when the wire rope 31 is in the first winding state, the wire rope 31 of the hoisting winch 3 sequentially bypasses the first supporting pulley 51, the second supporting pulley 52, the first pulley 23 and the second pulley 24, and then lifts the gear or the blade 300, and when the wire rope 31 is in the second winding state, the wire rope 31 of the hoisting winch 3 sequentially bypasses the third supporting pulley 53, the first pulley 23 and the second pulley 24, and then lifts the gear or the blade 300. When the steel wire rope 31 is in the first winding state, the first telescopic cylinder 41 is in a pressed state, and the steel wire rope 31 is in the first winding state, so that the pressure load borne by the first telescopic cylinder 41 can be reduced; when the wire rope 31 is in the second winding state, the first telescopic cylinder 41 is in a tensioned state, and the tensile load on the first telescopic cylinder 41 can be reduced when the wire rope 31 is in the second winding state. For ease of understanding, fig. 2 and 3 are provided herein. Fig. 2 is a schematic structural diagram of the steel cable in the first winding state according to the embodiment of the disclosure, and referring to fig. 2, it can be seen that when the rotating gantry 2 rotates to a state where the first telescopic cylinder 41 is under pressure, the steel cable 31 is in the first winding state, a part of the pressure applied to the first telescopic cylinder 41 is shared by the second supporting pulley 52, and the steel cable 31 is used to lift the gear box 400 in the nacelle 200.

Fig. 3 is a schematic structural diagram of the wire rope in the second winding state according to the embodiment of the disclosure, and referring to fig. 3, it can be known that when the rotating gantry 2 rotates to a state where the first telescopic cylinder 41 is in tension at this time, the wire rope 31 is in the second winding state, a part of the tension applied to the first telescopic cylinder 41 is shared by the third supporting pulley 53, and the wire rope 31 is used for lifting the blade 300 on the nacelle 200 at this time.

Referring to fig. 1, each of the rotation legs 22 may further include a first reinforcing rod 224, a first end of the first reinforcing rod 224 is fixed to the first rotation rod 221, and a second end of the first reinforcing rod 224 is fixedly connected to a second end of the support rod 223.

First stiffener 224 can carry out the outrigger to bracing piece 223, reduces bracing piece 223 atress too big and the possibility of damage, and first stiffener 224 can improve the stability of rotating portal 2, guarantees to rotate the holistic stable use of portal 2.

Optionally, the second end of the second telescopic cylinder 42 is hinged to the middle of the support rod 223, each of the rotation legs 22 further comprises a second reinforcing rod 225, the second end of the second reinforcing rod 225 is fixed to the first end of the first rotation rod 221, and the second end of the second reinforcing rod 225 is fixedly connected to the middle of the support rod 223.

The second reinforcing rod 225 can further support the support rod 223 and prevent the joint between the support rod 223 and the second telescopic cylinder 42 from being damaged or broken due to an excessive force. The second reinforcing bar 225, the support bar 223 and the first rotating bar 221 form a stable triangular geometric structure, so that the stability of the rotating gantry 2 can be enhanced, and the use stability of the rotating gantry 2 can be increased as much as possible on the premise of reducing the volume and the manufacturing cost of the lifting device as much as possible.

Fig. 4 is a front view of the hoisting device provided in the embodiment of the present disclosure, and as can be seen from fig. 4, the hoisting device may include two hoisting winches 3, wherein the wire rope 31 of one hoisting winch 3 passes sequentially around the first pulley 23 and the second pulley 24 on one rotating leg 22, and the wire rope 31 of the other hoisting winch 3 passes sequentially around the first pulley 23 and the second pulley 24 on the other rotating leg 22.

The two lifting winches 3 may be respectively disposed at both sides of the rotating gantry 2, and the two lifting winches 3 lift the blade 300 or the gear box 400 together, so that the lifting efficiency of the blade 300 and the gear box 400 may be improved while the blade 300 and the gear box 400 are stably lifted.

As can be seen from fig. 4, the hoisting apparatus may further include an intermediate hoisting assembly 6, the intermediate hoisting assembly 6 includes a hoisting plate 61 and a hook 62, the hoisting plate 61 is located between the cross beam 21 and the two rotating legs 22, the hook 62 is fixedly connected to the hoisting plate 61, the wire rope 31 of one hoisting winch 3 is connected to the end of the second pulley 24 on one rotating leg 22, the wire rope 31 of the other hoisting winch 3 is connected to the end of the second pulley 24 on the other rotating leg 22, and the wire ropes 31 of both hoisting winches 3 are disposed on the hoisting plate 61.

The intermediate hoisting assembly 6 comprises a lifting plate 61 and a hook 62, and the two hoisting winches 3 jointly lift the lifting plate 61 and the hook 62 connected to the lifting plate 61, so that the stable lifting of the gear box 400 and the blade 300 can be facilitated.

As can be seen with reference to fig. 4, the intermediate hoisting assembly 6 further comprises a first intermediate pulley 63, a second intermediate pulley 64, a third intermediate pulley 65, a first movable pulley 66 and a second movable pulley 67, the axes of which are parallel to each other. The first intermediate pulley 63, the second intermediate pulley 64 and the third intermediate pulley 65 are provided on the cross beam 21 at an interval, the axis of the first intermediate pulley 63 is perpendicular to the axis of the first pulley 23, and the first movable pulley 66 and the second movable pulley 67 are provided on the lift plate 61 at an interval. The wire rope 31 of one hoisting winch 3 passes around the second pulley 24 on one rotating leg 22, then passes through the first intermediate pulley 63, the first movable pulley 66 and the second intermediate pulley 64 in sequence, the wire rope 31 of the other hoisting winch 3 passes around the second pulley 24 on the other rotating leg 22, then passes through the third intermediate pulley 65, the second movable pulley 67 and the second intermediate pulley 64 in sequence, and the ends of the wire ropes 31 of the two hoisting winches 3 are connected.

The middle lifting assembly 6 is arranged above, when the two lifting winches 3 work, a first movable pulley 66 and a second movable pulley 67 on the lifting plate 61, and a first middle pulley 63, a second middle pulley 64 and a third middle pulley 65 on the cross beam 21 form a 4-multiplying-power pulley, so that labor is saved when the lifting winches 3 pull the steel wire rope 31 to lift the blade 300 or the gear box 400, and the burden of the lifting winches 3 can be reduced.

Alternatively, a mounting plate 68 is detachably connected to the cross beam 21, and the first intermediate pulley 63, the second intermediate pulley 64, and the third intermediate pulley 65 may be disposed on the mounting plate 68. The installation and winding of the first intermediate pulley 63, the second intermediate pulley 64 and the third intermediate pulley 65 are facilitated.

Illustratively, the first intermediate pulley 63, the third intermediate pulley 65, the first movable pulley 66 and the second movable pulley 67 may be distributed around the second intermediate pulley 64. Facilitating the winding of the wire rope 31.

As can be seen with reference to fig. 4, the revolving portal 2 may further comprise two guide pulleys 25 having axes parallel to each other, the two guide pulleys 25 being respectively disposed on the two second revolving levers 222, the axis of the first guide pulley 25 being perpendicular to the axis of the second pulley 24, and each guide pulley 25 being disposed between one of the second pulleys 24 and the intermediate hoisting assembly 6.

The guide pulley 25 can guide the steel wire rope 31, so that the steel wire rope 31 can smoothly enter the intermediate lifting assembly 6 after bypassing the second pulley 24, and the stable lifting of the blade 300 and the gear box 400 is ensured.

Fig. 5 is a simplified schematic diagram of a winding state of a steel wire rope according to an embodiment of the present disclosure, and referring to fig. 5, it can be seen that a plurality of first pulleys 23 may be disposed on the support rod 223, and a plurality of first pulleys 23 are disposed side by side, and a plurality of second pulleys 24 may also be disposed on the second rotating rod 222, and a plurality of second pulleys 24 are disposed side by side. Facilitating lifting of the blade 300 and gearbox 400.

Fig. 6 is a schematic structural diagram of the tower connecting assembly 11 provided in the embodiment of the present disclosure, and as can be seen from fig. 6, the tower connecting assembly 11 may include an annular cylinder 111, a plurality of pressing blocks 112, and a plurality of driving members 113 corresponding to the plurality of pressing blocks 112 one to one, the annular cylinder 111 is configured to be coaxially sleeved on the tower drum 100, a plurality of mounting holes 111a are provided in the circumferential direction of the annular cylinder 111, the plurality of pressing blocks 112 are disposed in the plurality of mounting holes 111a in one to one correspondence, the plurality of driving members 113 are disposed on the annular cylinder 111, the plurality of driving members 113 are connected to the plurality of pressing blocks 112 in one to one correspondence, and each driving member 113 is configured to drive the corresponding pressing block 112 to move along the radial direction of the annular cylinder 111.

By adopting the structure, the tower drum connecting assembly 11 can drive the pressing block 112 in the mounting hole 111a through the driving piece 113, and the annular drum 111 can move radially to press the outer wall of the tower drum 100, so that the annular drum 111 is fixed on the tower drum 100, the tower drum connecting base 1 is also fixed on the tower drum 100, and after the tower drum connecting base 1 is fixed, the gantry 2 and the lifting winch 3 can be rotated to work. Facilitating the securing of the hoist to the tower 100.

Alternatively, the tower attachment base 1 may be fixed to one end of the annular cylinder 111, and the first surface 1a of the tower attachment base 1 may be parallel to the end surface of the annular cylinder 111. At this time, the annular cylinder 111 can also support the tower cylinder connecting base 1, so that stable use of the hoisting device is ensured.

The driving member 113 may be a jack or a telescopic cylinder, and the disclosure is not limited thereto.

Alternatively, a rubber layer may be disposed on the surface of the compression block 112. The friction between the pressing block 112 and the outer wall of the tower tube 100 can be increased, and the abnormal movement of the annular tube 111 is avoided.

Illustratively, the annular cylinder 111 may include two detachably connected semi-annular plates 1111. The tower tube connecting assembly 11 is convenient to disassemble and assemble.

It should be noted that the tower attachment base 1 may be attached to one of the half ring plates 1111. Is convenient for disassembly and assembly.

Fig. 7 is an installation schematic view of the hoisting device provided in the embodiment of the disclosure, and referring to fig. 7, when the hoisting device in the disclosure is installed, the annular cylinder 111 may be firstly sleeved on the bottom of the tower 100, and no force is applied between the pressing block 112 and the outer wall of the tower 100. A transition platform 20 is fixed on the top of a tower drum 100 through a self-elevating platform 10, a steel wire rope 301 of a lifting winch 30 on the transition platform 20 is fixedly connected with a tower drum connecting base 1, the lifting winch 30 retracts a rope, and a lifting device can move towards the transition platform 20 under the action of the lifting winch 30 until the lifting device moves to the top of the tower drum 100. At this time, the driving member 113 in the tower connecting assembly 11 operates, so that the pressing block 112 presses the outer wall of the tower 100, and the hoisting device is fixed with the tower 100, and the hoisting device can operate. When the hoisting device is disassembled, the operations are performed reversely. The lifting device can be mounted and dismounted only by the self-elevating platform 10 and the transition platform 20, the participation of large ships such as wind power installation ships is not needed, and the use cost is low.

Although the present invention has been described with reference to the above embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A hoisting device for offshore wind turbine maintenance is characterized by comprising a tower drum connecting base (1), a rotating portal frame (2), a lifting winch (3) and a driving assembly (4), wherein a tower drum connecting assembly (11) is arranged on the tower drum connecting base (1),

the rotary portal frame (2) comprises a cross beam (21), two parallel opposite rotary legs (22), a first pulley (23) and a second pulley (24), the two ends of the cross beam (21) are respectively connected with the two rotary legs (22), each rotary leg (22) comprises a coplanar first rotary rod (221), a coplanar second rotary rod (222) and a support rod (223), the first end of the first rotary rod (221) is hinged to the tower barrel connecting base (1), the second end of the first rotary rod (221) is hinged to the first end of the second rotary rod (222), the second end of the second rotary rod (222) is fixed to one end of the cross beam (21), the first end of the support rod (223) is fixed to the middle of the first rotary rod (221), the first pulley (23) is connected with the second end of the support rod (223) in a rolling manner, the second pulley (24) is connected to the second end of the second rotary rod (222) in a rolling manner, the axis of the first pulley (23) is parallel to the axis of the second pulley (24), the axis of the first pulley (23) is perpendicular to the plane of the rotating leg (22),

The lifting winch (3) is arranged on the tower drum connecting base (1), a steel wire rope (31) of the lifting winch (3) sequentially rounds the first pulley (23) and the second pulley (24),

drive assembly (4) all include coplane first telescoping cylinder (41) and second telescoping cylinder (42), the first end of first telescoping cylinder (41) with base (1) is connected to the tower section of thick bamboo is articulated, the second end of first telescoping cylinder (41) with first dwang (221) are articulated, the first end of second telescoping cylinder (42) with bracing piece (223) are articulated, the second end of second telescoping cylinder (42) with second dwang (222) are articulated.

2. Hoisting device for offshore wind turbine maintenance, according to claim 1, characterized in that the tower connection foundation (1) comprises a first surface (1a) and a second surface (1b) parallel and opposite to each other, the first surface (1a), the rotating gantry (2) and the drive assembly (4) being arranged on the first surface (1a), the hoisting winch (3) being arranged on the second surface (1 b).

3. Hoisting device for offshore wind turbine maintenance according to claim 2, characterized in that the hoisting device further comprises a support pulley block (5), the support pulley block (5) comprises a first support pulley (51) and a second support pulley (52) arranged rolling on the first surface (1a), the axis of the first support pulley (51) and the axis of the second support pulley (52) are both parallel to the axis of the first pulley (23), the end face of the first support pulley (51) and the end face of the second support pulley (52) are in the same plane, and the first support pulley (51) and the second support pulley (52) are located on both sides of the first telescopic cylinder, the first support pulley (51) and the second support pulley (52) are used for the steel cable (31) to pass around, and then sequentially passes by the first pulley (23) and the second pulley (24).

4. Hoisting device for offshore wind turbine maintenance according to claim 3, characterized in that the set of support pulleys (5) further comprises a third support pulley (53) having an axis parallel to the axis of the first support pulley (51), the third support pulley (53) being arranged rolling on the edge of the first surface (1a), the third support pulley (53) being arranged for passing around the wire rope (31) and then passing around the first pulley (23) and the second pulley (24) in sequence.

5. Lifting device for offshore wind turbine maintenance, according to any of the claims 1 to 4, wherein each of the turning legs (22) further comprises a first stiffening rod (224), a first end of the first stiffening rod (224) being fixed to the first turning rod (221), and a second end of the first stiffening rod (224) being fixedly connected to a second end of the support rod (223).

6. Hoisting device for offshore wind turbine maintenance according to claim 5, wherein the second end of the second telescopic cylinder (42) is hinged to the middle of the support bar (223), each of the turning legs (22) further comprises a second stiffening bar (225), the second end of the second stiffening bar (225) is fixed to the first end of the first turning bar (221), and the second end of the second stiffening bar (225) is fixedly connected to the middle of the support bar (223).

7. Hoisting device for offshore wind turbine maintenance according to any of claims 1-4, characterized in that the hoisting device comprises two hoisting winches (3), the wire rope (31) of one of the hoisting winches (3) passing in turn over the first pulley (23) and the second pulley (24) on one of the turning legs (22), the wire rope (31) of the other hoisting winch (3) passing in turn over the first pulley (23) and the second pulley (24) on the other turning leg (22).

8. Lifting device for offshore wind turbine maintenance according to claim 7, the hoisting device also comprises an intermediate hoisting assembly (6), the intermediate hoisting assembly (6) comprises a lifting plate (61) and a lifting hook (62), the lifting plate (61) is located between the cross beam (21) and the two turning legs (22), the lifting hook (62) is fixedly connected with the lifting plate (61), a steel wire rope (31) of one lifting winch (3) is connected with one end of the second pulley (24) on one rotating leg (22) in a bypassing manner, a steel wire rope (31) of the other lifting winch (3) is connected with one end of the second pulley (24) on the other rotating leg (22) in a bypassing manner, and the steel wire ropes (31) of the two hoisting winches (3) are arranged on the lifting plate (61).

9. Hoisting device for offshore wind turbine maintenance according to claim 8, characterized in that the intermediate hoisting assembly (6) further comprises a first intermediate pulley (63), a second intermediate pulley (64), a third intermediate pulley (65), a first movable pulley (66) and a second movable pulley (67) having mutually parallel axes. The first intermediate pulley (63), the second intermediate pulley (64) and the third intermediate pulley (65) are arranged on the cross beam (21) at intervals, the axis of the first intermediate pulley (63) is vertical to the axis of the first pulley (23), the first movable pulley (66) and the second movable pulley (67) are arranged on the lifting plate (61) at intervals,

one wire rope (31) of hoisting winch (3) is walked around one rotate on leg (22) behind second pulley (24), walk around in proper order first middle pulley (63), first movable pulley (66) and second middle pulley (64), another wire rope (31) of hoisting winch (3) is walked around another rotate on leg (22) behind second pulley (24), walk around in proper order third middle pulley (65), second movable pulley (67) with second middle pulley (64), just the end of wire rope (31) of two hoisting winch (3) links to each other.

10. A hoisting device for offshore wind turbine maintenance as claimed in any one of claims 1 to 4, characterized in that the tower tube connecting assembly (11) comprises an annular tube (111), a plurality of pressing blocks (112) and a plurality of driving pieces (113) which are in one-to-one correspondence with the pressing blocks (112), the annular cylinder (111) is coaxially sleeved on the tower cylinder 100, the annular cylinder (111) is fixedly connected with the tower cylinder connecting base (1), a plurality of mounting holes (111a) are formed in the circumferential direction of the annular cylinder (111), the plurality of pressing blocks (112) are arranged in the plurality of mounting holes (111a) in a one-to-one correspondence manner, the plurality of driving pieces (113) are arranged on the annular cylinder (111), and the driving pieces (113) are connected with the compaction blocks (112) in a one-to-one correspondence manner, and each driving piece (113) is used for driving the corresponding compaction block (112) to move along the radial direction of the annular cylinder (111).