Single-hook hoisting and turning-over device for mounting and dismounting large megawatt wind power impeller

Abstract

The utility model relates to a single-hook hoisting turnover device for mounting and dismounting a large megawatt wind power impeller, which comprises a main hoisting arm, a transverse swing arm, a driving structure, an impeller upper hoisting seat and an impeller side hoisting seat, a first hoisting point structure is arranged at one end of the transverse swing arm, and a second hoisting point structure is arranged at the other end of the transverse swing arm; a hinge point between the main lifting arm and the transverse swing arm is located between the first lifting point structure and the second lifting point structure, and a connecting point of the first lifting point structure and the impeller upper lifting base and a connecting point of the second lifting point structure and the impeller side lifting base are located on the two sides of an included angle area of the gravity center plumb line of the impeller in the horizontal placing posture and the gravity center plumb line of the impeller in the butt joint posture. Through cooperation of the structures, the purpose that the wind power impeller is hoisted and turned over through a single hook is achieved, compared with a mode of coordinated operation of two cranes, the operation cost and the operation difficulty are reduced, and meanwhile the risk that the cranes and the impeller overturn is also reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power construction, in particular to a single-hook hoisting and turning-over device for large-megawatt wind power impeller installation and dismounting. BACKGROUND

[0002] In the prior art, the installation method of the wind turbine impeller is as follows: first, the hub and three blades are assembled to form an impeller, and the impeller is placed horizontally on the ground; then, a main hook is connected to the blade root of the first blade and the second blade (or connected to the side of the hub away from the third blade), and an auxiliary hook is connected to the third blade; then, the main hook and the auxiliary hook are simultaneously started to rise, thereby lifting the impeller; then, the main hook and the auxiliary hook are cooperatively operated to turn the impeller to a nearly ninety-degree to docking posture; finally, the impeller is connected to the flange of the nacelle main shaft for installation, thereby completing the assembly of the impeller.

[0003] The dismounting process of the impeller is the reverse operation of the installation process: the main hook is connected to the blade root of the first blade and the second blade (or connected to the side of the hub away from the third blade), and the auxiliary hook is connected to the third blade; the mounting bolts of the impeller and the nacelle main shaft are removed; the main hook and the auxiliary hook are simultaneously lowered to lift the impeller away from the nacelle; then, the main hook and the auxiliary hook are cooperatively operated to turn the impeller to a horizontal posture; finally, the main hook and the auxiliary hook are simultaneously lowered to place the impeller horizontally on the ground.

[0004] However, in actual use, the cooperative operation of the main hook and the auxiliary hook has the following problems: the cooperative operation of the main hook and the auxiliary hook requires two cranes to cooperate, the cost of renting the cranes is high, the construction occupies a large area, and in the process of turning the impeller with the cooperation of the two cranes, the auxiliary crane needs to cooperate to perform operations such as arm swinging, arm lifting, and hook lifting, which is low in efficiency and has the risk of overturning if the auxiliary crane is not operated properly; at the same time, the cooperative operation of the main hook and the auxiliary hook has requirements for the angle of the auxiliary hoisted blade, and the blade must be in a reverse pitch position or a forward pitch position, which has poor resistance to lateral wind; when encountering a strong wind environment, the blade needs to be in a vertical position (i.e., the wind receiving surface is vertical), and after the impeller is lifted, the vertical wind receiving surface of the blade will cause the impeller to shake greatly, thereby pulling the auxiliary crane to overturn, which will easily cause the main crane and the impeller to overturn, and the overall installation process is high in risk; in addition, when dismounting the impeller, workers need to bundle the sling connected to the auxiliary hook on the third blade, which requires high-altitude operation and has safety risks. CONTENT OF THE INVENTION

[0005] In order to solve the problems of large operation difficulty, high construction cost, and safety risks in the process of the cooperative operation of the two hooks for lifting and turning over the impeller, the present application provides a single-hook hoisting and turning-over device for large-megawatt wind power impeller installation and dismounting.

[0006] The application provides a single-hook lifting and turning-over device for large-megawatt wind turbine installation and removal.

[0007] The single-hook lifting and turning-over device for large-megawatt wind turbine installation and removal comprises a main lifting arm, a transverse swing arm rotatably connected to one end of the main lifting arm, a driving structure arranged on the main lifting arm and used for driving the transverse swing arm to rotate, a turbine upper lifting seat used for connecting an upper end flange of a turbine hub, and a turbine side lifting seat used for connecting a side flange of the turbine hub, one end of the transverse swing arm is provided with a first lifting point structure used for lifting the turbine upper lifting seat, the other end of the transverse swing arm is provided with a second lifting point structure used for lifting the turbine side lifting seat, the hinge point between the main lifting arm and the transverse swing arm is located between the first lifting point structure and the second lifting point structure, and the connection points of the first lifting point structure and the turbine upper lifting seat and the connection points of the second lifting point structure and the turbine side lifting seat are located on both sides of the included angle region of the gravity center vertical line of the turbine in a flat attitude and the gravity center vertical line of the turbine in a butt joint attitude.

[0008] By adopting the above technical scheme, in use, the turbine upper lifting seat is fixed on the upper end flange of the turbine hub, the turbine side lifting seat is fixed on the side flange of the turbine hub, the lifting hook of a crane is connected with the end of the main lifting arm, the turbine upper lifting seat and the turbine side lifting seat are connected with the transverse swing arm through the cooperation of the first lifting point structure and the second lifting point structure, the single-hook lifting of the turbine can be realized through the main lifting arm and the transverse swing arm, the transverse swing arm is driven to swing through the driving structure, the relative movement of the turbine upper lifting seat and the turbine side lifting seat in the vertical direction is realized, the single-hook lifting and turning-over operation of the wind turbine is realized, the operation is simple during the turning-over process, compared with the coordinated operation mode of two cranes, the construction cost is reduced, the construction site is reduced, the risk of overturning of the crane and the turbine caused by human operation during the turning-over process is reduced, and the construction efficiency is improved; meanwhile, the turning-over device is only connected with the hub in the middle of the turbine, so the wind receiving surface of the blade can be adjusted to a horizontal attitude before the turbine is turned over, so that the horizontal wind receiving area of the blade is reduced after the turbine is lifted, the influence of the turbine plane shaking on the single lifting point lifting is small, the problem that the turbine is overturned due to sudden strong wind during the turning-over process is solved, and the construction operation window period is increased due to the small influence of the wind speed.

[0009] Preferably, the hinge point between the main lifting arm and the transverse swing arm is arranged close to the first lifting point structure.

[0010] By adopting the above technical scheme, the distance between the first lifting point structure and the hinge point between the main lifting arm and the transverse swing arm is set to be smaller than the distance between the second lifting point structure and the hinge point between the main lifting arm and the transverse swing arm.

[0011] Preferably, the driving structure comprises a hydraulic cylinder arranged on the main boom, a cylinder end of the hydraulic cylinder is rotationally connected to the main boom, a piston rod end of the hydraulic cylinder is rotationally connected to the transverse swing arm, and the connection point between the piston rod end of the hydraulic cylinder and the transverse swing arm is located between the connection point of the main boom and the transverse swing arm and the second lifting point structure.

[0012] By adopting the technical scheme, in use, the transverse swing arm is driven to rotate through the extension and retraction of the piston rod of the hydraulic cylinder, so that the upper impeller lifting seat and the side impeller lifting seat gradually move relative to each other in the height direction, and the impeller can be driven to rotate and turn over, which is simple and convenient to operate.

[0013] Preferably, the end of the transverse swing arm away from the first lifting point structure is detachably connected with a swing arm lifting seat, and the second lifting point structure is arranged on the swing arm lifting seat.

[0014] By adopting the technical scheme, in use, the distance between the first lifting point structure and the second lifting point structure is adjusted by replacing the swing arm lifting seat of different sizes, the compatibility of the impeller hoisting and turning over of different models is improved, and the applicability of the turning over device as a whole is improved.

[0015] Preferably, the first lifting point structure comprises a rear pin shaft fixed to the end of the transverse swing arm away from the swing arm lifting seat, an upper impeller lifting belt arranged around the rear pin shaft, and an upper lifting point shackle arranged at the end of the upper impeller lifting belt away from the rear pin shaft, the upper lifting point shackle being detachably connected to the upper impeller lifting seat, the second lifting point structure comprises a front pin shaft fixed to the swing arm lifting seat, a side impeller lifting belt arranged around the front pin shaft, and a side lifting point shackle arranged at the end of the side impeller lifting belt away from the front pin shaft, the side lifting point shackle being detachably connected to the side impeller lifting seat.

[0016] By adopting the technical scheme, in use, the cooperation of the upper impeller lifting belt, the upper lifting point shackle, the side impeller lifting belt and the side lifting point shackle ensures the stability of the connection between the transverse swing arm and the upper impeller lifting seat and the side impeller lifting seat, and the overall connection is more convenient and beneficial to use.

[0017] Preferably, the first lifting point structure comprises a first pull rod rotationally connected to the end of the transverse swing arm away from the swing arm lifting seat, and a first rotating pin arranged at the end of the first pull rod away from the transverse swing arm, the first rotating pin being rotationally connected to the upper impeller lifting seat, the second lifting point structure comprises a second pull rod rotationally connected to the swing arm lifting seat, and a second rotating pin arranged at the end of the second pull rod away from the transverse swing arm, the second rotating pin being rotationally connected to the side impeller lifting seat.

[0018] By adopting the technical scheme, in use, the cooperation of the first pull rod, the first rotating pin, the second pull rod and the second rotating pin improves the convenience of the assembly of the device as a whole and the impeller under the premise of ensuring the turning over effect of the impeller.

[0019] Preferably, the impeller side hanger seat comprises a triangular connecting plate, a first connecting plate fixed at one end of the triangular connecting plate, and a second connecting plate fixed at the other end of the triangular connecting plate, the first connecting plate and the second connecting plate are connected with the impeller hub side wall, and there is an included angle between the first connecting plate and the hub gravity center connecting line and the second connecting plate and the hub gravity center connecting line.

[0020] By adopting the above technical scheme, when in use, the cooperation of the triangular connecting plate, the first connecting plate and the second connecting plate ensures the stability of the connection structure between the impeller side hanger seat and the impeller hub.

[0021] Preferably, the main hanger arm is provided with a main hanger pin shaft at one end away from the transverse swing arm, and the main hanger pin shaft is connected with a main hanger belt.

[0022] By adopting the above technical scheme, when in use, the main hanger pin shaft and the main hanger belt are provided, which is more convenient for the connection of the main hanger arm and the external hoisting machine, and the device is more convenient to use.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. The cooperation of the main hanger arm, the transverse swing arm, the first lifting point structure and the second lifting point structure realizes the purpose of single-hook lifting of the impeller, and the cooperation of the driving structure to drive the transverse swing arm to swing drives the relative movement of the upper hanger seat and the impeller side hanger seat in the vertical direction, that is, the single-hook lifting and turning over operation of the wind power impeller is realized. The turning over process is simple to operate, compared with the coordinated operation mode of two hoisting machines, the construction cost is reduced, the construction site is reduced, and the risk of overturning of the hoisting machine and the impeller caused by human operation in the turning over process is also reduced, and the construction efficiency is improved. At the same time, the turning over device is only connected with the hub in the middle of the impeller, so before the impeller turns over, the wind receiving surface of the blade can be adjusted to a horizontal posture, so that the horizontal wind receiving area of the blade is reduced after the impeller is lifted, and the single-lifting-point lifting is less affected by the impeller plane shaking, thereby solving the problem of overturning caused by sudden strong wind during the turning over process. Also, the wind speed has little effect, so the construction operation window period is increased. When the impeller is removed, workers do not need to bundle and connect the third blade, avoiding the risk of high-altitude operation.

[0025] 2. The connection of the driving structure, the transverse swing arm, the main hanger arm, the first lifting point structure and the second lifting point structure ensures the turning over effect and stability of the impeller, and at the same time, the angle of the impeller can be adjusted when the impeller is connected with the nacelle, improving the installation efficiency and installation quality.

[0026] 3. The device can be used for impeller installation and impeller disassembly, and has certain advantages in reducing cost, improving efficiency and improving equipment and personnel safety. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the main embodiment of the application, the use of the turning device state diagram;

[0028] Figure 2 is the main embodiment of the application, the structure of the shaft measurement diagram;

[0029] Figure 3 is the main embodiment of the application, the impeller flat attitude diagram;

[0030] Figure 4 is the main embodiment of the application, the impeller initial lifting state diagram;

[0031] Figure 5 is the main embodiment of the application, the impeller turning process state diagram;

[0032] Figure 6 is the main embodiment of the application, the impeller docking state diagram;

[0033] Figure 7 is the main embodiment of the application, the impeller side lifting seat structure diagram;

[0034] Figure 8 is the main embodiment of the application, the impeller side lifting seat structure diagram.

[0035] Figure 1, the main hoist arm; 11, hinge pin; 2, transverse swing arm; 3, drive structure; 31, hydraulic cylinder; 32, cylinder end pin; 33, rod end pin; 4, impeller upper lifting seat; 5, impeller side lifting seat; 51, triangular connecting plate; 511, rear seat body; 512, front cover plate; 52, first connecting plate; 53, second connecting plate; 54, connecting hole; 55, cam; 56, worm; 57, worm; 58, drive motor; 6, first lifting point structure; 61, rear pin; 62, impeller upper lifting belt; 63, upper lifting point shackle; 64, first pull rod; 65, first rotating pin; 7, second lifting point structure; 71, front pin; 72, impeller side lifting belt; 73, side lifting point shackle; 74, second pull rod; 75, second rotating pin; 8, swing arm lifting seat; 9, main hoist pin; 10, main hoist belt. DETAILED DESCRIPTION

[0036] The following will be combined with the Figure 1 - attached Figure 8 The application is further described in detail.

[0037] The application discloses a single-hook lifting and turning device for installing and dismounting megawatt wind power impeller.

[0038] Referring to Figure 1 andFigure 2 The single-hook hoisting and turning-over device for installing and dismounting megawatt wind turbine impellers comprises a main hoisting arm 1, a transverse swing arm 2, a driving structure 3, an impeller upper hoisting seat 4 and an impeller side hoisting seat 5. In the initial state, the impeller is horizontally placed on the ground, the main hoisting arm 1 is vertically arranged above the impeller, the top end of the main hoisting arm 1 is provided with a main hoisting pin shaft 9, the main hoisting pin shaft 9 is connected with a main hoisting belt 10, the main hoisting belt 10 is used for connecting the hoisting hook of a hoisting machine, the bottom end of the main hoisting arm 1 is hinged with the transverse swing arm 2 through a hinge pin shaft 11, the hinge pin shaft 11 is located at the lowest end of the transverse swing arm 2, a first hoisting point structure 6 is arranged at the left end of the transverse swing arm 2, and a second hoisting point structure 7 is arranged at the right end of the transverse swing arm 2.

[0039] With reference to Figure 1 and Figure 2 The impeller upper hoisting seat 4 is connected with the upper end flange of the impeller hub through bolts, the impeller side hoisting seat 5 is composed of a triangular connecting plate 51, a first connecting plate 52 and a second connecting plate 53, the first connecting plate 52 is welded and fixed at the upper end of the triangular connecting plate 51, the second connecting plate 53 is welded and fixed at the lower end of the triangular connecting plate 51, the first connecting plate 52 and the second connecting plate 53 are both in screw fixing connection with the side wall of the impeller hub, and after the impeller side hoisting seat 5 is combined with the impeller hub, an included angle exists between the connecting line of the first connecting plate 52 and the hub gravity center and the connecting line of the second connecting plate 53 and the hub gravity center, so as to ensure the stability of the impeller side hoisting seat 5 when connected with the impeller, thereby ensuring the stability in the subsequent impeller turning-over process.

[0040] With reference to Figure 1 and Figure 2 In use, the first hoisting point structure 6 is used for connecting the impeller upper hoisting seat 4 and the left end of the transverse swing arm 2, the second hoisting point structure 7 is used for connecting the impeller side hoisting seat 5 and the right end of the transverse swing arm 2, the driving structure 3 is used for driving the transverse swing arm 2 to rotate, the transverse swing arm 2 rotates synchronously to drive the impeller upper hoisting seat 4 and the impeller side hoisting seat 5 to relatively displace in the height direction, so as to realize the purpose of driving the impeller to rotate and turn over. In order to facilitate the rotation of the transverse swing arm 2, the hinge pin shaft 11 is preferably arranged at the position close to the left end in the middle of the transverse swing arm 2 in the embodiment.

[0041] With reference to Figure 1 and Figure 2 Under actual working conditions, the connection mode of the impeller upper hoisting seat 4, the impeller side hoisting seat 5 and the impeller hub can solve the problem that the wind wheel and the hoisting machine are overturned due to sudden strong wind in the construction process. The reason is that the commonly used impeller turning-over device needs to bind the hoisting point of the auxiliary hoisting machine on the blade, and the blade needs to be in the vertical posture (i.e. the wind receiving surface is vertical), so that the impeller is hoisted. If sudden strong wind occurs after the impeller is hoisted, the vertical wind receiving surface of the blade will cause the impeller plane to shake greatly, thereby pulling the auxiliary hoisting machine to overturn the auxiliary hoisting machine, and further causing the main hoisting machine and the impeller to overturn.

[0042] With reference to Figure 1 andFigure 2 For the present turning-over device, since it is connected with the hub in the middle of the impeller, the wind-receiving surface of the blade can be adjusted to a horizontal position in advance when the impeller is turned over, so that the horizontal wind-receiving area of the blade is small after the impeller is lifted, the swing range of the impeller plane is small, and the lifting of the single lifting point is less affected, so that the problem of overturning caused by sudden strong wind during the turning-over process can be solved, and the working window period is increased due to the small influence of wind speed.

[0043] With reference to Figure 1 and Figure 2 , the driving structure 3 comprises a hydraulic cylinder 31, the cylinder end of the hydraulic cylinder 31 is hinged to the main lifting arm 1 through a barrel end pin shaft 32, the piston rod end of the hydraulic cylinder 31 is hinged to the transverse swing arm 2 through a rod end pin shaft 33, and in order to ensure that the hydraulic cylinder 31 can normally drive the transverse swing arm 2 to swing during the extension and retraction of the piston rod, the rod end pin shaft 33 should be arranged between the hinge pin shaft 11 and the second lifting point structure 7 in the present application. In actual use, the barrel end pin shaft 32 and the rod end pin shaft 33 are arranged on the same side or opposite side of the main lifting arm 1, which does not affect the driving of the transverse swing arm 2, and in the present application, the barrel end pin shaft 32 and the rod end pin shaft 33 are preferably arranged on the right side of the main lifting arm 1.

[0044] With reference to Figure 1 and Figure 2 , in use, the transverse swing arm 2 is driven to rotate around the hinge pin shaft 11 through the extension and retraction of the piston rod of the hydraulic cylinder 31, so that the left end and the right end of the transverse swing arm 2 appear relative displacement in the height direction, and the first lifting point structure 6 and the second lifting point structure 7 cooperate to drive the relative displacement between the impeller upper lifting seat 4 and the impeller side lifting seat 5 in the height direction, so as to realize the rotation and turning-over of the impeller, or the fine adjustment of the angle of the turned-over impeller, thereby ensuring the alignment of the flange of the impeller with the flange of the main shaft of the nacelle in the butt joint position.

[0045] With reference to Figure 1 and Figure 2 , the first lifting point structure 6 is composed of a rear pin shaft 61, an impeller upper lifting belt 62 and an upper lifting point shackle 63, the rear pin shaft 61 is installed at the left end of the transverse swing arm 2, the impeller upper lifting belt 62 is connected to the rear pin shaft 61, and the upper lifting point shackle 63 is connected to the bottom end of the impeller upper lifting belt 62. The upper lifting point shackle 63 is detachably connected to the impeller upper lifting seat 4. In order to improve the overall applicability of the device, a swing arm lifting seat 8 is connected to the right end of the transverse swing arm 2 through bolts, and the second lifting point structure 7 is arranged on the swing arm lifting seat 8. The second lifting point structure 7 is composed of a front pin shaft 71, an impeller side lifting belt 72 and a side lifting point shackle 73.

[0046] With reference to Figure 1 and Figure 2, the front pin shaft 71 is installed on the swing arm hanger 8, the impeller side hanger 72 is arranged on the front pin shaft 71, the side hanger point shackle 73 is connected at the bottom end of the impeller side hanger 72, and the side hanger point shackle 73 is detachably connected with the triangular connecting plate 51; in use, when the hydraulic cylinder 31 drives the swing arm to rotate, under the action of the upper hanger 62 and the impeller side hanger 72, the upper hanger 4 and the impeller side hanger 5 can be driven to move in the height direction, so as to realize the purpose of driving the whole impeller to rotate, and in actual use, the lengths of the upper hanger 62 and the impeller side hanger 72 can be adjusted or replaced according to the use requirement.

[0047] With reference to Figure 1 and Figure 2 In addition, for different specifications of the impeller, the size of the hub has a certain deviation, at this time, the swing arm hanger 8 of the corresponding size can be replaced according to the size of the hub and the positions of the upper hanger 4 and the impeller side hanger 5 installed on the hub, so as to adjust the distance between the left end and the right end of the horizontal swing arm 2, so as to ensure the turning-over effect of the subsequent different types of impellers, and the compatibility of the whole device to the types of impellers is improved.

[0048] With reference to Figure 1 and Figure 2 Meanwhile, in actual working conditions, since the blades of the impeller in the flat-lying posture are arranged in an inclined upward manner, that is, the gravity center of the impeller is located at the upper position of the connecting root of the three blades and the hub, if the angle of rotation required for turning over the impeller from the flat-lying posture to the butt joint posture is set as α, the connecting point of the upper hanger point shackle 63 and the upper hanger 4 is set as the upper hanger point, the connecting point of the side hanger point shackle 73 and the impeller side hanger 5 is set as the side hanger point, the upper hanger point should be located on the counterclockwise side of the vertical line of the impeller in the flat-lying posture, the angle between the connecting line of the upper hanger point and the gravity center of the impeller and the vertical line of the impeller in the flat-lying posture is set as β; the side hanger point should be located on the clockwise side of the vertical line of the impeller in the butt joint posture, and the angle between the side hanger point and the vertical line of the impeller in the butt joint posture is set as γ.

[0049] With reference to Figure 1 and Figure 2 In actual working conditions, the angle α is about 80 degrees to 90 degrees, that is, the impeller needs to be rotated about 80 degrees to 90 degrees from the flat-lying posture to the butt joint posture, and in this process, the angle β and the angle γ are the redundancy of the two limit positions of the turning-over process, that is, for the same size of the impeller, as long as the upper hanger point and the side hanger point are located in the angle β and the angle γ range after the turning-over device is assembled with the impeller, the turning-over effect of the impeller can be ensured, so as to improve the compatibility of the whole turning-over device to the deviation of the gravity center of the same type of impeller, and the angle β and the angle γ are preferably set to be about 10 degrees to 15 degrees in the application.

[0050] With reference to Figure 1 and Figure 2Meanwhile, according to the setting relationship of the angle a, the angle β and the angle γ, the connecting holes 54 of the connecting side lifting point shackles 73 on the impeller side lifting seat 5 are arranged in several numbers, and the several connecting holes 54 have a height difference in the height direction, so that the position of the connecting point of the side lifting point shackle 73 and the impeller side lifting seat 5 is adjusted as needed, that is, the position of the side lifting point is changed, so that the size of the angle γ is changed, thereby reducing the influence of different impeller gravity center tolerances on the turning-over effect, and further ensuring the applicability of the device as a whole.

[0051] With reference to Figure 1 The turning-over device adopts the above installation and use sequence, realizes the hoisting and turning-over of the wind power impeller, and can also realize the purpose of disassembling and replacing the installed wind power impeller when the turning-over device is used in reverse. In addition, the simple transformation of the turning-over device can also be used for the turning-over and hoisting of the hub (impeller without blades), and has strong applicability.

[0052] The implementation principle of the embodiment is as follows: when in use, the assembled impeller is placed horizontally on the ground, the impeller upper lifting seat 4 and the impeller side lifting seat 5 are respectively installed and fixed on the upper end flange and the side flange of the impeller hub, so that two lifting point positions of the upper lifting point and the side lifting point are formed between the impeller hub and the device as a whole, then the lifting hook of the crane is connected and fixed with the main lifting belt 10, the main lifting arm 1 is lifted by the main lifting belt 10, the rodless cavity of the hydraulic cylinder 31 is supplied with oil to make the piston rod of the hydraulic cylinder 31 elongate, the transverse swing arm 2 is swung clockwise, the upper lifting point shackle 63 and the side lifting point shackle 73 are respectively connected with the impeller upper lifting seat 4 and the impeller side lifting seat 5 by the workers, and then the impeller can be lifted by the crane through the force applied to the main lifting arm 1. When the impeller needs to be turned over, only the piston rod of the hydraulic cylinder 31 needs to be retracted to drive the transverse swing arm 2 to rotate counterclockwise, so that the impeller is rotated under the lifting action of the impeller upper lifting belt 62 and the impeller side lifting belt 72, until the impeller is turned from the horizontal position to the butt joint position, and then the impeller is lifted to the top of the tower by the crane for installation and butt joint. During the butt joint process, the transverse swing arm 2 can also be driven to rotate by the hydraulic cylinder 31, so as to slightly adjust the angle of the impeller, thereby ensuring the quality and efficiency of the installation and butt joint of the impeller and the nacelle.

[0053] Embodiment 2:

[0054] With reference to Figure 3 , Figure 1 and Figure 2The difference between the embodiment and embodiment 1 is that the first lifting point structure 6 is composed of a first pull rod 64 and a first rotating pin 65, one end of the first pull rod 64 is hinged to the left end of the transverse swing arm 2, the first rotating pin 65 is installed on the upper lifting seat 4 of the impeller, the other end of the first pull rod 64 is hinged to the upper lifting seat 4 of the impeller through the first rotating pin 65, the second lifting point structure 7 is composed of a second pull rod 74 and a second rotating pin 75, one end of the second pull rod 74 is hinged to the swing arm lifting seat 8, the second rotating pin 75 is installed on the side lifting seat 5 of the impeller, and the other end of the second pull rod 74 is hinged to the side lifting seat 5 of the impeller through the second rotating pin 75.

[0055] With reference to Figure 1 , Figure 4 and Figure 5 , in actual use, different lengths of the first pull rod 64 and the second pull rod 74 can be replaced according to needs, so as to improve the compatibility of the device as a whole to different types of hubs or impellers, and at the same time, the first pull rod 64 and the second pull rod 74 can be replaced by structures with power telescopic function, such as telescopic electric cylinders, winches, etc., so that in the process of turning over, the distance between the transverse swing arm 2 and the upper lifting point and the side lifting point of the hub can be adjusted through the power telescopic function, which is suitable for different turning over needs and is more convenient to use.

[0056] Embodiment 3:

[0057] With reference to Figure 6 and Figure 4 , the difference between the embodiment and embodiment 1 is that a cam 55 is rotatably connected on the triangular connecting plate 51, one end of the cam 55 is fixed with a worm gear 56, a worm 57 is rotatably connected on the side lifting seat 5 of the impeller, the worm gear 56 and the worm 57 are cooperatively arranged, a driving motor 58 is installed on the side lifting seat 5 of the impeller, the output shaft of the driving motor 58 is coaxially fixedly connected with the worm 57, and the side lifting point shackle 73 is connected at the end of the cam 55 away from the worm gear 56; in use, the worm 57 is driven to rotate by the output shaft of the driving motor 58, the worm 57 rotates synchronously to drive the worm gear 56 to rotate, the worm gear 56 rotates to drive the cam 55 to swing, so as to drive the connection point between the side lifting point shackle 73 and the side lifting seat 5 of the impeller to swing, thereby achieving the adjustment of the side lifting point in the height direction, further reducing the influence of the gravity center tolerance of different specifications of impellers on the turning over process of the impeller, and ensuring that the hub flange and the main shaft flange of the nacelle are completely aligned during docking.

[0058] With reference to Figure 5 and Figure 6 , the above structure is used to realize the electric adjustment of the position of the side lifting point, compared with the manual adjustment of the position of the connection point between the side lifting point shackle 73 and the side lifting seat 5 of the impeller, the connection between the side lifting point shackle 73 and the side lifting seat 5 of the impeller does not need to be repeatedly disassembled, which is more convenient to use and safer.

[0059] With reference to Figure 7 and Figure 8In use, it is noted that after the hoisting side lifting point position is adopted, the length of the impeller side lifting belt 72 needs to be replaced to ensure that the impeller side lifting belt 72 and the impeller main lifting belt 10 are always in a taut state in the working state, thereby ensuring the turning quality. In the present embodiment, in order to facilitate use and reduce the replacement frequency of the impeller side lifting belt 72, the impeller side lifting belt 72 and the impeller upper lifting belt 62 can be replaced with a power telescopic structure such as a winch or a telescopic electric cylinder, and the winch is preferably arranged. That is, before the worm wheel 56 and the worm 57 are driven by the driving motor 58, it is ensured that the length of the chain of the winch is sufficient for adjustment, and when the side lifting point position is fixed, the chain also needs to be wound by the winch to ensure that the whole is taut.

[0060] With reference to Figure 7 and Figure 8 Figure 7 Figure 8 Figure 7 Figure 8 In the present embodiment, the triangular connecting plate 51 includes a rear seat body 511 and a front cover plate 512. The two ends of the rear seat body 511 are bolted to the hub. An installation cavity is formed in the rear seat body 511. The worm wheel 56, the worm 57 and the driving motor 58 are arranged in the installation cavity. The part of the cam 55 connected to the worm wheel 56 is located in the installation cavity. The other part of the cam 55 extends out of the installation cavity and is connected to the side lifting point shackle 73. The front cover plate 512 is bolted to the rear seat body 511. The front cover plate 512 is used to seal the installation cavity. In use, the worm wheel 56, the worm 57 and the driving motor 58 are all sealed in the installation cavity by the cooperation of the rear seat body 511 and the front cover plate 512, thereby reducing the interference of environmental factors on the above-mentioned transmission structure, and ensuring normal use.

[0061] The implementation principle of the embodiment of the application is: when in use, the assembled impeller is placed on the ground, the impeller upper lifting seat 4 and the impeller side lifting seat 5 are respectively installed on the upper end flange and the side flange of the impeller hub, so that two lifting point positions of the upper lifting point and the side lifting point are formed between the impeller hub and the device as a whole, then the lifting hook of the crane is connected and fixed with the main lifting belt 10, the main lifting arm 1 is lifted through the main lifting belt 10, the rodless cavity of the hydraulic cylinder 31 is supplied with oil to make the piston rod of the hydraulic cylinder 31 elongate, the transverse swing arm 2 is swung clockwise, the upper lifting point shackle 63 and the side lifting point shackle 73 are respectively connected with the impeller upper lifting seat 4 and the impeller side lifting seat 5 by the staff, the impeller can be lifted by the crane through the force applied to the main lifting arm 1, when the chain of the winch is taut, the position of the side lifting point can be adjusted according to the angle of the connecting line of the upper lifting point, the side lifting point and the gravity center of the impeller in this state, to ensure that the subsequent turning angle is smaller than the angle of the connecting line of the upper lifting point, the side lifting point and the gravity center of the impeller; after the adjustment is completed, the transverse swing arm 2 is swung by the hydraulic cylinder 31, so as to drive the impeller to rotate, until the impeller is turned from the flat-lying posture to the butt joint posture, then the impeller is lifted to the top cabin of the tower drum by the crane for installation and butt joint, during the butt joint process, the transverse swing arm 2 can also be rotated by the hydraulic cylinder 31 and the winding and unwinding of the chain of the winch, to realize the slight adjustment of the angle of the impeller, so as to ensure the quality and efficiency of the butt joint installation of the impeller and the cabin.

[0062] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: equivalent changes made on the basis of the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A single hook lifting and turning device for mounting and dismounting large megawatt wind turbine impellers, characterized in that: The device comprises a main hoist arm (1), a transverse swing arm (2) rotatably connected to one end of the main hoist arm (1), a driving structure (3) arranged on the main hoist arm (1) for driving the transverse swing arm (2) to rotate, an impeller upper lifting seat (4) for connecting the upper end flange of the impeller hub, and an impeller side lifting seat (5) for connecting the side flange of the impeller hub, one end of the transverse swing arm (2) is provided with a first lifting point structure (6) for lifting the impeller upper lifting seat (4), the other end of the transverse swing arm (2) is provided with a second lifting point structure (7) for lifting the impeller side lifting seat (5), the hinge point between the main hoist arm (1) and the transverse swing arm (2) is located between the first lifting point structure (6) and the second lifting point structure (7), and the connection points of the first lifting point structure (6) and the impeller upper lifting seat (4) and the connection points of the second lifting point structure (7) and the impeller side lifting seat (5) are located on both sides of the included angle region of the gravity vertical line of the impeller in the flat posture and the gravity vertical line of the impeller in the butt joint posture.

2. The single hook lifting and turning over device for mounting and dismounting large megawatt wind power impeller according to claim 1, characterized in that: The hinge point between the main hoist arm (1) and the transverse swing arm (2) is arranged close to the first lifting point structure (6).

3. The single hook lifting and turning over device for mounting and dismounting large megawatt wind power impeller according to claim 1, characterized in that: The driving structure (3) comprises a hydraulic cylinder (31) arranged on the main hoist arm (1), the cylinder body end of the hydraulic cylinder (31) is rotatably connected to the main hoist arm (1), the piston rod end of the hydraulic cylinder (31) is rotatably connected to the transverse swing arm (2), and the connection point of the piston rod end of the hydraulic cylinder (31) and the transverse swing arm (2) is located between the connection point of the main hoist arm (1) and the transverse swing arm (2) and the second lifting point structure (7).

4. The single hook lifting and turning over device for mounting and dismounting large megawatt wind power impeller according to claim 1, characterized in that: The end of the transverse swing arm (2) away from the first lifting point structure (6) is detachably connected with a swing arm lifting seat (8), and the second lifting point structure (7) is arranged on the swing arm lifting seat (8).

5. The single hook lifting and turning over device for mounting and dismounting large megawatt wind power impeller according to claim 4, characterized in that: The first lifting point structure (6) comprises a rear pin shaft (61) fixed to the end of the transverse swing arm (2) away from the swing arm lifting seat (8), an impeller upper lifting belt (62) wound around the rear pin shaft (61), and an upper lifting point shackle (63) arranged at the end of the impeller upper lifting belt (62) away from the rear pin shaft (61), the upper lifting point shackle (63) is detachably connected with the impeller upper lifting seat (4), and the second lifting point structure (7) comprises a front pin shaft (71) fixed to the swing arm lifting seat (8), an impeller side lifting belt (72) wound around the front pin shaft (71), and a side lifting point shackle (73) arranged at the end of the impeller side lifting belt (72) away from the front pin shaft (71), the side lifting point shackle (73) is detachably connected with the impeller side lifting seat (5).

6. The single hook lifting and turning over device for mounting and dismounting large megawatt wind power impeller according to claim 4, characterized in that: The first lifting point structure (6) comprises a first pull rod (64) rotatably connected at the end of the transverse swing arm (2) away from the swing arm lifting seat (8), and a first rotating pin (65) arranged at the end of the first pull rod (64) away from the transverse swing arm (2), the first rotating pin (65) being rotatably connected with the impeller upper lifting seat (4); the second lifting point structure (7) comprises a second pull rod (74) rotatably connected on the swing arm lifting seat (8), and a second rotating pin (75) arranged at the end of the second pull rod (74) away from the transverse swing arm (2), the second rotating pin (75) being rotatably connected with the impeller side lifting seat (5).

7. The single hook lifting and turning over device for mounting and dismounting large megawatt wind power impeller according to claim 1, characterized in that: The impeller side lifting seat (5) comprises a triangular connecting plate (51), a first connecting plate (52) fixed at one end of the triangular connecting plate (51), and a second connecting plate (53) fixed at the other end of the triangular connecting plate (51), the first connecting plate (52) and the second connecting plate (53) are both connected with the impeller hub side wall, and there is an included angle between the first connecting plate (52) and the hub gravity center connecting line and the second connecting plate (53) and the hub gravity center connecting line.

8. The single hook lifting and turning over device for mounting and dismounting large megawatt wind power impeller according to claim 1, characterized in that: The main lifting arm (1) is provided with a main lifting pin shaft (9) at the end away from the transverse swing arm (2), and the main lifting pin shaft (9) is connected with a main lifting belt (10).

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