A lifting device for wind power castings

Abstract

The invention relates to the technical field of wind turbine casting processing, and discloses a lifting device for wind turbine castings, comprising a lifting hanger and a wind turbine hub, wherein a lifting component is installed on the inner diameter of a variable pitch bearing and the inner diameter of a mounting hole of the wind turbine hub, and the lifting component comprises a traction mechanism, a pulling component installed on the bottom end of the traction mechanism, an outer mounting component and an inner mounting component installed outside the pulling component, wherein the outer mounting component and the inner mounting component are respectively clamped on the inner diameter of the variable pitch bearing and the inner diameter of the mounting hole of the wind turbine hub by the wind turbine hub's own weight and the pulling force formed by the pulling component being lifted upward by the traction mechanism, and the wind turbine hub to be lifted is lifted by the lifting component in cooperation with a crane trolley, and the traction component in the lifting component pulls the wind turbine hub, and the outer mounting component and the inner mounting component are used to fix the wind turbine hub under the wind turbine hub's own weight, so as to provide a safe fixing solution for lifting the wind turbine hub.

Description

Technical Field

[0001] The invention relates to the field of wind power casting processing, and in particular to a lifting device for wind power castings. Background Art

[0002] Lifting equipment for wind turbine castings is a special lifting equipment that is needed to ensure efficiency and safety during the manufacturing and assembly process of wind turbine castings. For example, when the wind turbine hub needs to be transferred and moved, a bridge crane is needed to lift the wind turbine hub and then transfer it to the workstation in the workshop using rails.

[0003] The prior art proposes a wind turbine hub lifting tool (announcement number is CN219792158U), which includes a lifting plate, a locking column, a fixing column and a locking rod. A lifting hook is installed on the top of the lifting plate. The locking column is installed on the lower surface of the lifting plate and can be extended into the through hole. There are three fixing columns, and the three fixing columns are connected to the lower surface of the lifting plate around the locking column. The locking rod is slidably arranged on the fixing column along the radial direction of the locking column. Three locking holes are evenly opened on the circumferential direction of the side wall of the locking column. The locking rod can be inserted into the locking hole after passing through the mounting hole. The threaded matching structure between the threaded tube and the sleeve in the prior art is abandoned, thereby avoiding the wear of the thread.

[0004] In the above method, the wind turbine hub is fixed by a locking column and a locking rod to solve the thread matching structure between the threaded tube and the sleeve in the prior art and avoid the wear of the thread. However, this technical solution has the following problems: before lifting the wind turbine hub that needs to be lifted, the locking column and the locking rod must be assembled by a hoist before the wind turbine hub can be fixed. In addition, since the size of the installation hole of the wind turbine hub for installing the fan blades is not easy, there may be a situation where the wind turbine hub cannot be fixed due to the small hole diameter.

[0005] Secondly, if the wind turbine hub is lifted only by a cable and a hook, the wind turbine hub will shake due to uneven force during the lifting process, and the shaking of the wind turbine hub may accidentally hit obstacles and people, posing a safety hazard. Summary of the invention

[0006] The purpose of the present invention is to provide a technical solution to solve the problems in the prior art mentioned in the above background technology.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A lifting device for wind power castings, comprising a lifting hanger and a wind power hub, the lifting hanger comprising a crossbeam, a longitudinal beam and a guide wheel, the top surface of the crossbeam is respectively fixedly mounted on both sides of the longitudinal beam, the top surface of the longitudinal beam is respectively rotatably connected with the guide wheels, the longitudinal beam moves along a guide rail through the guide wheels, a crane trolley and a lifting assembly are installed at the bottom of the crossbeam, the lifting assembly is installed on the inner diameter of the variable pitch bearing and the inner diameter of the mounting hole of the wind power hub, the lifting hanger controls the height of the lifting assembly by retracting and releasing the rope on the lifting trolley, and the lifting assembly is hung with the end of the rope through a metal hoop;

[0009] The hoisting assembly includes a traction mechanism, a pulling assembly installed on the bottom end of the traction mechanism, an outer mounting assembly and an inner mounting assembly installed outside the pulling assembly, the outer mounting assembly and the inner mounting assembly are respectively clamped on the inner diameter of the variable pitch bearing and the inner diameter of the mounting hole of the wind turbine hub by the gravity of the wind turbine hub itself and the pulling force formed by the pulling assembly being lifted upward by the traction mechanism, and the top end of the traction mechanism is hooked to the end of the rope on the lifting trolley;

[0010] The pulling assembly includes a pulling plate, a fourth lifting ring, a fifth lifting ring, a sixth lifting ring and a trapezoidal plate, the pulling plate is in an "L" structure, the bottom end of the pulling plate is vertically fixedly connected to the trapezoidal plate, the pulling plate and the trapezoidal plate are welded with triangular support plates at the integral bending parts, the fourth lifting ring is fixedly connected to the top surface of the pulling plate, the fifth lifting ring is respectively fixed in parallel to the inner side wall of the pulling plate, and the sixth lifting ring is respectively fixed in parallel to the bottom surface of the pulling plate;

[0011] The pull plate is connected to the outer mounting assembly through the fifth and sixth lifting rings in cooperation with the second cable, and the side walls of the trapezoidal plate are connected to the inner mounting assembly in a sliding manner;

[0012] The outer mounting assembly includes a mounting plate, a pin shaft, a rotating plate, a second pulley and a third lifting ring, wherein the pin shaft is fixedly mounted on the inner side wall of the mounting plate, the rotating plate is provided with a pin hole, and the rotating plate is rotatably connected to the side wall of the pin shaft through the pin hole, the second pulley is mounted in a support at the outer end of the rotating plate, the third lifting ring is fixedly connected to the inner end of the rotating plate, and the third lifting ring is fixedly connected to the fifth lifting ring and the sixth lifting ring on the surface of the pulling plate through a second cable respectively;

[0013] The cam is an assembly made of a first piece, a second piece, a second piece, a second piece, a third ...

[0014] Preferably, the traction mechanism includes a hanging plate and a first cable, a first hanging ring is fixedly connected to the center of the top surface of the hanging plate, the end of the rope on the lifting trolley passes through the interior of the first hanging ring, folds inward and is fixedly connected by a metal hoop, at least three first hanging rings are fixedly connected to a circle on the bottom surface of the hanging plate, the top end of the first cable passes through the interior of the first hanging ring on the bottom surface of the hanging plate, folds inward and is fixedly connected by a metal hoop, the bottom end of the first cable passes through the interior of the fourth hanging ring on the top surface of the pulling assembly, folds inward and is fixedly connected by a metal hoop.

[0015] Preferably, the side wall of the first cable is slidably connected with an anti-winding component, and the anti-winding component includes an outer ring, an inner disk and a support rod, the inner disk is located at the inner center of the outer ring, and a plurality of support rods are fixedly connected to the inner wall of the outer ring around the outer wall of the inner disk, and the outer ring is provided with notches according to the position of the first cable, and a first pulley is rotatably connected in the notch, and the side wall of the first cable is slidably connected to the side wall of the first pulley.

[0016] Preferably, a second lifting ring is fixedly connected to the center of the top surface of the inner plate, and a first lifting ring is fixedly connected to the center of the bottom surface of the lifting plate. The interiors of the first lifting ring and the second lifting ring are respectively passed through the two ends of the third cable, folded inward, and fixedly connected through metal hoops.

[0017] Preferably, there are four rotating plates, and all of the four rotating plates are in a bent structure;

[0018] Among them, the two rotating plates located on the upper half of the side wall of the installation plate are turned outward along the pin axis as the center by lifting the pulling plate, and the two rotating plates located on the lower half of the side wall of the installation plate are symmetrically arranged with the two rotating plates on the upper half of the side wall of the installation plate.

[0019] Preferably, the third lifting rings on the inner ends of the two rotating plates on the upper half of the side wall of the mounting plate are fixedly connected to the fifth lifting ring through the second cable, and the third lifting rings on the two rotating plates on the lower half of the side wall of the mounting plate are fixedly connected to the sixth lifting ring through the second cable.

[0020] Preferably, the clamping block is in a crescent shape, and the transition area from the clamping slot to the side wall of the clamping block is an arc surface.

[0021] Technical effects and advantages of the present invention: Compared with the prior art, the present invention provides a lifting device for wind power castings, which has the following advantages:

[0022] 1. The present invention lifts the wind turbine hub that needs to be lifted by cooperating with the lifting assembly and the crane trolley. The traction assembly in the lifting assembly pulls the wind turbine hub, and the outer mounting assembly and the inner mounting assembly are respectively stuck on the inner diameter of the variable pitch bearing and the inner diameter of the mounting hole of the wind turbine hub under the action of the wind turbine hub's own gravity and the pulling force formed by the pulling assembly being lifted upward by the traction mechanism, so as to provide a better and safer fixing scheme for lifting the wind turbine hub, replacing the existing hook directly hooking the wind turbine hub and the locking column and locking rod fixing method, and when in use, only the outer mounting assembly and the inner mounting assembly need to be installed on the inner diameter of the variable pitch bearing and the inner diameter of the mounting hole of the wind turbine hub, and the outer mounting assembly and the inner mounting assembly can be fixed on the mounting hole of the wind turbine hub for mounting the fan blade during the lifting process, which can also have the advantage of easy installation;

[0023] 2. In the present invention, three first cables in the traction mechanism of the hoisting assembly act on three groups of pulling assemblies, external mounting assemblies and internal mounting assemblies respectively, and the three groups of pulling assemblies, external mounting assemblies and internal mounting assemblies are respectively installed on the three mounting holes of the wind turbine hub for mounting fan blades. Therefore, during the process of lifting the wind turbine hub, the force of the wind turbine hub can be kept balanced, thereby improving the stability of the wind turbine hub during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the lifting equipment for wind power castings of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the lifting hanger of the present invention;

[0026] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 4 It is a schematic diagram of the structure of the hoisting assembly of the present invention when the wind turbine hub is lifted;

[0028] Figure 5 It is a structural schematic diagram of the hoisting assembly of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the anti-winding component of the present invention;

[0030] Figure 7 It is a schematic diagram of the structure of assembling the outer installation component and the inner installation component of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the external mounting assembly and the pulling assembly of the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the installation component and the pulling component in the present invention;

[0033] Fig.10 It is a schematic diagram of the structure inside the installation component of the present invention.

[0034] In the figure:

[0035] 1. Lifting hanger; 11. Crossbeam; 12. Longitudinal beam; 13. Guide wheel;

[0036] 2. Crane trolley;

[0037] 3. Rope;

[0038] 4. Lifting plate; 41. First lifting ring;

[0039] 5. First cable;

[0040] 6. Anti-winding assembly; 61. Outer ring; 62. Inner plate; 63. Support rod; 64. Notch; 65. First pulley; 66. Second lifting ring;

[0041] 7. External mounting assembly; 71. Mounting plate; 72. Pin shaft; 73. Turn plate; 74. Second pulley; 75. Third lifting ring; 76. Second cable;

[0042] 8. Wind turbine hub;

[0043] 9. Inner mounting assembly; 91. First support plate; 92. Fixed column; 93. Second support plate; 94. Limiting groove; 95. Sliding block; 96. Block; 97. Slot; 98. Moving plate; 99. Third pulley;

[0044] 10. Pulling assembly; 101. Pull plate; 102. Fourth lifting ring; 103. Fifth lifting ring; 104. Sixth lifting ring; 105. Trapezoidal plate; 106. Limiting plate;

[0045] 111. The third cable. DETAILED DESCRIPTION

[0046] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0047] The invention provides Figure 1-Figure 10 As shown, a lifting device for wind power castings includes a lifting hanger 1 and a wind power hub 8, as shown in FIG. Figure 2 and Figure 3 As shown, the lifting hanger 1 includes a crossbeam 11, a longitudinal beam 12 and a guide wheel 13. The two sides of the top surface of the crossbeam 11 are fixedly installed with the longitudinal beam 12 respectively, and the two sides of the top surface of the longitudinal beam 12 are rotatably connected with the guide wheels 13 respectively. The longitudinal beam 12 moves along the guide rail through the guide wheels 13. A crane trolley 2 is installed at the bottom of the crossbeam 11. When it is necessary to lift the wind turbine hub 8 in the wind turbine casting, the existing method is to install a hook through the rope 3 on the crane trolley 2, hang the hook in the installation hole or on the hole of the wind turbine hub 8, and then reel the rope 3 through the crane trolley 2 to lift the wind turbine hub 8.

[0048] In order to better hoist the wind turbine hub 8, the wind turbine hub 8 is fixed and then hoisted by an adapted hoisting assembly. The hoisting assembly is installed on the inner diameter of the variable pitch bearing and the inner diameter of the mounting hole of the wind turbine hub 8. The hoisting hanger 1 controls the height of the hoisting assembly by retracting and releasing the rope 3 on the hoisting trolley. The hoisting assembly is connected to the end of the rope 3 by a metal hoop, and then the lifting and lowering of the hoisting assembly can be controlled by the crane trolley 2, so as to control the fixed wind turbine hub 8;

[0049] Further, such as Figure 4 and Figure 5 As shown, the hoisting assembly includes a traction mechanism, a pulling assembly 10 installed on the bottom end of the traction mechanism, an outer mounting assembly 7 and an inner mounting assembly 9 installed outside the pulling assembly 10. The outer mounting assembly 7 and the inner mounting assembly 9 are respectively stuck on the inner diameter of the variable pitch bearing and the inner diameter of the mounting hole of the wind turbine hub 8 through the gravity of the wind turbine hub 8 itself and the pulling force formed by the pulling assembly 10 being lifted up by the traction mechanism. The top end of the traction mechanism is connected to the end of the rope 3 on the lifting trolley. The wind turbine hub 8 can be fixed at multiple angles through the outer mounting assembly 7 and the inner mounting assembly 9 under the movement of the pulling assembly 10, thereby avoiding the existing unhooking situation. The wind turbine hub 8 can be fixed by only the gravity of the wind turbine hub 8 itself without relying on the electric device.

[0050] Specifically, Figure 5As shown, the traction mechanism includes a hanging plate 4 and a first cable 5, a first hanging ring 41 is fixedly connected to the center of the top surface of the hanging plate 4, the end of the rope 3 on the lifting trolley passes through the inside of the first hanging ring 41, folds inward and is fixedly connected by a metal hoop, and at least three first hanging rings 41 are fixedly connected to a circle of the bottom surface of the hanging plate 4, the top end of the first cable 5 passes through the inside of the first hanging ring 41 on the bottom surface of the hanging plate 4, folds inward and is fixedly connected by a metal hoop, the bottom end of the first cable 5 passes through the inside of the fourth hanging ring 102 on the top surface of the pulling component 10, folds inward and is fixedly connected by a metal hoop, and by installing three first cables 5 on the hanging plate 4, the pulling component 10 can be pulled respectively by the three first cables 5, so that the three groups of external mounting components 7 and internal mounting components 9 respectively fix the three fan blade mounting holes on the side wall of the wind turbine hub 8 to ensure the stability of the wind turbine hub 8 during and after lifting.

[0051] Furthermore, if Figure 5 and Figure 6 As shown, in order to prevent the three first cables 5 from getting entangled during the lifting and suspension of the wind turbine hub 8, the side walls of the first cables 5 are slidably connected with an anti-winding component 6, and the anti-winding component 6 includes an outer ring 61, an inner disk 62 and a support rod 63. The inner disk 62 is located at the inner center of the outer ring 61, and a plurality of support rods 63 are fixedly connected to the inner wall of the outer ring 61 in a circle on the outer wall of the inner disk 62. The outer ring 61 is respectively provided with notches 64 according to the positions of the first cables 5, and a first pulley 65 is rotatably connected in the notch 64. The side walls of the first cables 5 are slidably connected to the side walls of the first pulley 65, and a second lifting ring 66 is fixedly connected to the center of the top surface of the inner disk 62. The first lifting ring 41 is fixedly connected to the center of the bottom surface of the lifting disk 4, and the interiors of the first lifting ring 41 and the second lifting ring 66 are respectively passed through the two ends of the third cable 111, folded inwardly and fixedly connected through metal hoops.

[0052] The three first cables 5 are stretched and separated by the outer ring 61, the inner disk 62 and the support rod 63, so that the three first cables 5 are separated one by one to avoid the three first cables 5 from being entangled. At the same time, in order to reduce the surface wear of the first cables 5, the force direction of the first cables 5 is changed by the pulley to reduce the surface friction of the first cables 5. At the same time, the traction mechanism is hoisted by the third cable 111 to prevent the traction mechanism from falling off the three first cables 5 when the wind turbine hub 8 is not being towed.

[0053] like Figure 7-Figure 10As shown, in order to realize the pulling and driving of the pulling component 10 on the external installation component 7 and the internal installation component 9, the pulling component 10 includes a pulling plate 101, a fourth lifting ring 102, a fifth lifting ring 103, a sixth lifting ring 104 and a trapezoidal plate 105. The pulling plate 101 is in an "L" structure, the bottom end of the pulling plate 101 is vertically fixedly connected to the trapezoidal plate 105, and triangular support plates are welded at the integral bending parts of the pulling plate 101 and the trapezoidal plate 105. The fourth lifting ring 102 is fixedly connected to the top surface of the pulling plate 101, the fifth lifting ring 103 is respectively fixed in parallel to the inner side wall of the pulling plate 101, and the sixth lifting ring 104 is respectively fixed in parallel to the bottom surface of the pulling plate 101;

[0054] Among them, Figure 8 As shown, the pull plate 101 is transmission-connected to the outer mounting assembly 7 through the fifth lifting ring 103 and the sixth lifting ring 104 in cooperation with the second cable 76, and the side walls of the trapezoidal plate 105 are slidingly connected to the inner mounting assembly 9. Specifically, the outer mounting assembly 7 includes a mounting plate 71, a pin shaft 72, a rotating plate 73, a second pulley 74 and a third lifting ring 75. The pin shaft 72 is fixedly mounted on the inner side wall of the mounting plate 71, and a pin hole is provided on the rotating plate 73. The rotating plate 73 is rotationally connected to the side wall of the pin shaft 72 through the pin hole. The second pulley 74 is installed in a support at the outer end of the rotating plate 73, and the third lifting ring 75 is fixedly connected to the inner end of the rotating plate 73. The third lifting ring 75 is fixedly connected to the fifth lifting ring 103 and the sixth lifting ring 104 on the surface of the pull plate 101 through the second cable 76.

[0055] Before use, the mounting plate 71 is placed at the center of the inner diameter of the variable pitch bearing of the wind turbine hub 8, and the inner mounting assembly 9 is also placed in the mounting hole of the wind turbine hub 8. When the traction mechanism moves upward under the lifting of the lifting trolley, the pull plate 101 can move upward. A slide groove is provided on the side wall of the mounting plate 71. The pull plate 101 moves upward in the slide groove, and the second cable 76 is pulled respectively, so that the inner end of the rotating plate 73 is subjected to an oblique upward force, driving the rotating plate 73 to rotate along the pin shaft 72 on the inner side of the mounting plate 71, so that the pulleys at the other end of the rotating plate 73 are respectively in contact with the inner diameter surface of the variable pitch bearing of the wind turbine hub 8, thereby maintaining the stability of the connection position during the lifting process of the wind turbine hub 8 to prevent the occurrence of displacement due to force.

[0056] It is worth noting that there are four rotating plates 73, all of which are bent structures, and the outer side of the bent rotating plates 73 is longer than the inner side to ensure that after the rotating plates 73 are rotated, the outer end can contact the inner diameter surface of the variable pitch bearing of the wind turbine hub 8, wherein the two rotating plates 73 located on the upper half of the side wall of the mounting plate 71 are lifted by the pulling plate 101 and flipped outward along the pin shaft 72 as the center, the two rotating plates 73 located on the lower half of the side wall of the mounting plate 71 are symmetrically arranged with the two rotating plates 73 on the upper half of the side wall of the mounting plate 71, the third lifting rings 75 on the inner ends of the two rotating plates 73 located on the upper half of the side wall of the mounting plate 71 are fixedly connected to the fifth lifting ring 103 through the second cable 76, and the third lifting rings 75 on the two rotating plates 73 located on the lower half of the side wall of the mounting plate 71 are fixedly connected to the sixth lifting ring 104 through the second cable 76.

[0057] Therefore, when the pull plate 101 is pulled upward, the outer ends of the four rotating plates 73 can be rotated out from the inside of the mounting plate 71, thereby forming multiple supporting points acting on the inner diameter surface of the pitch bearing of the wind turbine hub 8 to ensure the stability of the lifting after installation.

[0058] like Fig. 9 and Fig.10 As shown, in order to fix the wind turbine hub 8 during the lifting process of the wind turbine hub 8, the inner mounting assembly 9 includes a first support plate 91, a fixing column 92, a second support plate 93, a slider 95, a clamping block 96, a clamping groove 97, a movable plate 98 and a third pulley 99. The inner side wall of the first support plate 91 is fixedly mounted with the second support plate 93 through the fixing column 92, and the outer side wall of the second support plate 93 is fixedly mounted with the inner side wall of the mounting plate 71 through the fixing column 92. The trapezoidal plate 105 is fixedly mounted on the first support plate 91, the fixing column 92 and the second support plate 93. The movable plate 98 is vertically movable in the internal cavity formed, and the side walls of the first support plate 91 and the second support plate 93 are respectively provided with limit grooves 94, and the sliders 95 are slidably connected in the limit grooves 94. The sliders 95 are respectively fixedly connected to the side walls of the movable plate 98, and the outer ends of the movable plate 98 are respectively fixedly connected to the blocks 96, and the outer side walls of the blocks 96 are provided with grooves 97. The inner end of the movable plate 98 is rotatably connected with the third pulley 99, and the third pulley 99 is respectively slidably connected on the side walls on both sides of the trapezoidal plate 105, and the bottom end of the trapezoidal plate 105 is integrally formed with a limit plate 106.

[0059] When the wind turbine hub 8 needs to be fixed, when the external mounting assembly 7 is installed on the inner diameter surface of the pitch bearing of the wind turbine hub 8, the two clamping blocks 96 are placed in the mounting hole of the wind turbine hub 8. When the pulling plate 101 moves upward, since the side wall of the trapezoidal plate 105 is inclined, narrow at the top and wide at the bottom, when the third pulley 99 slides on the inclined surface, it pushes the two movable plates 98 to move outward at the same time, and also makes the slider 95 slide in the limiting groove 94, so that the two clamping blocks 96 can expand outward on both sides of the first support plate 91 and the second support plate 93, so that the clamping groove 97 can be stuck on the aperture of the mounting hole according to the different sizes of the mounting holes opened in the wind turbine hub 8, so as to provide a more secure fixation for the wind turbine hub 8 when lifting to prevent it from falling off.

[0060] It is worth mentioning that the block 96 is in a crescent shape, and the side wall transition area from the slot 97 to the block 96 is an arc surface. The crescent-shaped block 96 can better fit the mounting hole, and the side wall transition area from the slot 97 to the block 96 is an arc surface design, so that the slot 97 can be stuck on the side wall of the aperture of the mounting hole, while also avoiding wear on the aperture of the wind turbine hub 8.

[0061] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A lifting device for a wind turbine casting, comprising a lifting hanger (1) and a wind turbine hub (8), wherein the lifting hanger (1) comprises a cross beam (11), a longitudinal beam (12) and a guide wheel (13), wherein both sides of the top surface of the cross beam (11) are respectively fixedly mounted on the longitudinal beam (12), and both sides of the top surface of the longitudinal beam (12) are respectively rotatably connected to the guide wheels (13), and the longitudinal beam (12) moves along a guide rail through the guide wheels (13), and a crane trolley (2) is installed at the bottom of the cross beam (11), characterized in that: A hoisting assembly, the hoisting assembly being mounted on the inner diameter of the variable pitch bearing and the inner diameter of the mounting hole of the wind turbine hub (8), the hoisting hanger (1) controlling the height of the hoisting assembly by retracting and extending the rope (3) on the hoisting trolley, the hoisting assembly being connected to the end of the rope (3) via a metal hoop; The hoisting assembly comprises a traction mechanism, a pulling assembly (10) mounted on the bottom end of the traction mechanism, an outer mounting assembly (7) and an inner mounting assembly (9) mounted outside the pulling assembly (10), the outer mounting assembly (7) and the inner mounting assembly (9) being respectively clamped on the inner diameter of the variable pitch bearing and the inner diameter of the mounting hole of the wind turbine hub (8) by the gravity of the wind turbine hub (8) itself and the pulling force formed by the pulling assembly (10) being lifted upward by the traction mechanism, and the top end of the traction mechanism is connected to the end of the rope (3) on the lifting trolley; The pulling assembly (10) comprises a pulling plate (101), a fourth lifting ring (102), a fifth lifting ring (103), a sixth lifting ring (104) and a trapezoidal plate (105); the pulling plate (101) is in an "L" structure; the bottom end of the pulling plate (101) is vertically fixedly connected to the trapezoidal plate (105); triangular support plates are welded at the integral bending parts of the pulling plate (101) and the trapezoidal plate (105); the fourth lifting ring (102) is fixedly connected to the top surface of the pulling plate (101); the fifth lifting ring (103) is respectively fixedly parallel to the inner side wall of the pulling plate (101); and the sixth lifting ring (104) is respectively fixedly parallel to the bottom surface of the pulling plate (101); The pull plate (101) is transmission-connected to the outer mounting assembly (7) through a fifth lifting ring (103) and a sixth lifting ring (104) in cooperation with a second cable (76), and the side walls of the trapezoidal plate (105) are slidably connected to the inner mounting assembly (9); The outer mounting assembly (7) comprises a mounting plate (71), a pin shaft (72), a rotating plate (73), a second pulley (74) and a third lifting ring (75); the pin shaft (72) is fixedly mounted on the inner side wall of the mounting plate (71); the rotating plate (73) is provided with a pin hole; the rotating plate (73) is rotatably connected to the side wall of the pin shaft (72) through the pin hole; the second pulley (74) is mounted in a support at the outer end of the rotating plate (73); the third lifting ring (75) is fixedly connected to the inner end of the rotating plate (73); the third lifting ring (75) is fixedly connected to the fifth lifting ring (103) and the sixth lifting ring (104) on the surface of the pulling plate (101) through a second cable (76); The inner mounting assembly (9) comprises a first support plate (91), a fixed column (92), a second support plate (93), a sliding block (95), a clamping block (96), a clamping groove (97), a movable plate (98) and a third pulley (99); the inner side wall of the first support plate (91) is fixedly mounted to the second support plate (93) via the fixed column (92); the outer side wall of the second support plate (93) is fixedly mounted to the inner side wall of the mounting plate (71) via the fixed column (92); the trapezoidal plate (105) moves vertically in an internal cavity formed by the first support plate (91), the fixed column (92) and the second support plate (93); The side walls of the support plate (91) and the second support plate (93) are respectively provided with limiting grooves (94), the sliders (95) are slidably connected in the limiting grooves (94), the sliders (95) are respectively fixedly connected to the side walls of the movable plate (98), the outer ends of the movable plates (98) are respectively fixedly connected to the clamping blocks (96), the outer side walls of the clamping blocks (96) are provided with clamping grooves (97), the inner ends of the movable plates (98) are rotatably connected to the third pulleys (99), the third pulleys (99) are respectively slidably connected to the side walls of the trapezoidal plate (105), and the bottom end of the trapezoidal plate (105) is integrally formed with the limiting plate (106).

2. A lifting device for wind power castings according to claim 1, characterized in that: The traction mechanism comprises a suspension plate (4) and a first cable (5); a first suspension ring (41) is fixedly connected to the center of the top surface of the suspension plate (4); the end of the rope (3) on the lifting trolley passes through the inside of the first suspension ring (41), folds inward, and is fixedly connected via a metal hoop; at least three first suspension rings (41) are respectively fixedly connected to a circle of the bottom surface of the suspension plate (4); the top ends of the first cables (5) pass through the inside of the first suspension rings (41) on the bottom surface of the suspension plate (4), folds inward, and is fixedly connected via a metal hoop; the bottom end of the first cable (5) passes through the inside of the fourth suspension ring (102) on the top surface of the pulling component (10), folds inward, and is fixedly connected via a metal hoop.

3. A lifting device for wind power castings according to claim 2, characterized in that: The side wall of the first cable (5) is slidably connected to an anti-winding component (6), the anti-winding component (6) comprising an outer ring (61), an inner disk (62) and a support rod (63), the inner disk (62) being located at the inner center of the outer ring (61), a plurality of support rods (63) being fixedly connected to the inner wall of the outer ring (61) on a circle around the outer wall of the inner disk (62), the outer ring (61) being provided with notches (64) according to the position of the first cable (5), a first pulley (65) being rotatably connected in the notch (64), and the side wall of the first cable (5) being slidably connected to the side wall of the first pulley (65).

4. A lifting device for wind power castings according to claim 3, characterized in that: A second lifting ring (66) is fixedly connected to the center of the top surface of the inner plate (62), and a first lifting ring (41) is fixedly connected to the center of the bottom surface of the lifting plate (4). The interiors of the first lifting ring (41) and the second lifting ring (66) are respectively passed through the two ends of the third cable (111), folded inward, and fixedly connected via metal hoops.

5. The lifting equipment for wind power casting according to claim 1, characterized in that: Four rotating plates (73) are provided, and the four rotating plates (73) are all in a bent structure; The two rotating plates (73) located at the upper half of the side wall of the mounting plate (71) are lifted by the pull plate (101) and rotated outward along the pin shaft (72) as the center of the circle, and the two rotating plates (73) located at the lower half of the side wall of the mounting plate (71) are symmetrically arranged with the two rotating plates (73) located at the upper half of the side wall of the mounting plate (71).

6. A lifting device for wind power castings according to claim 5, characterized in that: The third lifting rings (75) on the inner ends of the two rotating plates (73) located at the upper half of the side wall of the mounting plate (71) are fixedly connected to the fifth lifting ring (103) via the second cables (76), and the third lifting rings (75) on the two rotating plates (73) located at the lower half of the side wall of the mounting plate (71) are fixedly connected to the sixth lifting ring (104) via the second cables (76).

7. A lifting device for wind power castings according to claim 1, characterized in that: The clamping block (96) is in a crescent shape, and the transition area from the clamping groove (97) to the side wall of the clamping block (96) is a curved surface.

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