Bidirectional rotation adjustable positioning hoisting equipment

Abstract

The utility model discloses bidirectional rotating adjustable positioning hoisting equipment, which relates to the technical field of wind power generation and comprises a main hoisting beam, a rotating lifting lug, a positioning turntable, a universal driving shaft and a positioning pin. The rotary lifting lugs are rotatably arranged at the two ends of the main lifting beam; the positioning turntable is arranged at the end part of the main lifting beam and is close to the rotary lifting lug; the linkage shaft is used for connecting the rotary lifting lug, the main lifting beam and the positioning turntable; the positioning pin is arranged on the rotary lifting lug and used for fixing the linkage shaft and the rotary lifting lug so that the linkage shaft and the rotary lifting lug can rotate synchronously. According to the bidirectional-rotation adjustable positioning hoisting equipment, contraction and expansion deformation of the hoisting equipment is achieved through bidirectional rotation of the rotary lifting lugs at the two ends, rotary control and positioning locking of the rotary lifting lugs are accurately achieved in cooperation with the positioning rotary disc, the hoisting angle can be adjusted, an opening does not need to be independently formed in a hub flow guide cover for the hoisting equipment, and the hoisting efficiency is improved. The situation that the fairing is damaged due to the fact that the fairing is dismounted or split in the mounting and dismounting process can be avoided, and simplicity and convenience are achieved.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and in particular to a bidirectional rotating adjustable positioning hoisting device. Background Technology

[0002] In recent years, wind power technology has continued to develop, and the single-unit capacity of wind turbines has been continuously increasing. As a result, the weight of the assembled wind turbine components has become increasingly heavy. The hub fairing assembly is the core rotating component of the wind turbine. It is responsible for installing and fixing the wind turbine blades and connecting the main shaft of the wind turbine. It is an important component for converting wind energy into kinetic energy and then into electrical energy. The hoisting method used for the hub fairing assembly directly affects the installation progress, commissioning time, and power generation of the unit.

[0003] Early wind turbines had small unit capacities, typically assembling the hub fairing assembly and blades on the ground, with the entire rotor lifted into place. However, in recent years, turbine unit capacities have increased rapidly, and the hub fairing assembly has become increasingly heavy. Therefore, a separate lifting method for the hub fairing assembly and blades has become a pressing need. Traditional wind turbine lifting tools have different interface methods, lifting positions, and lifting angles, making them unsuitable for lifting the hub fairing assembly. Therefore, providing a flexible, angle-adjustable, and universally applicable hub fairing assembly lifting device is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a bidirectional rotating adjustable positioning hoisting device, which solves the technical problem that traditional wind turbine hoisting tools are not suitable for hoisting hub fairing assemblies.

[0005] To achieve the above objectives, this utility model provides a bidirectional rotating adjustable positioning hoisting device, comprising:

[0006] Main lifting beam;

[0007] Rotary lifting lugs are rotatably mounted at both ends of the main lifting beam;

[0008] A positioning turntable is located at the end of the main lifting beam, near the rotating lifting lug;

[0009] A linkage shaft is used to connect the rotating lug, the main lifting beam, and the positioning turntable.

[0010] A positioning pin is provided on the rotating lug to fix the linkage shaft and the rotating lug so that the linkage shaft and the rotating lug rotate synchronously.

[0011] Preferably, the rotating lug includes:

[0012] The base plate is set horizontally.

[0013] A connecting plate is vertically installed and fixed to the base plate, with the side of the connecting plate away from the base plate being an arc-shaped surface;

[0014] Rib plates are located on both sides of the connecting plate and are connected to the base plate and the connecting plate;

[0015] The connecting plate is provided with mounting holes for engaging with the linkage shaft, and the arc-shaped surface is provided with positioning holes for engaging with positioning pins to fix the linkage shaft and the rotating lug.

[0016] Preferably, the positioning turntable has an inner hole in the middle for cooperating with the linkage shaft. The positioning turntable also has a positioning part, which includes at least two positioning holes arranged along the circumference of the positioning turntable. The positioning holes are connected by a sliding groove, which extends along the circumference of the positioning turntable.

[0017] Preferably, one end of the linkage shaft is provided with a positioning retaining ring for abutting against the end face of the main lifting beam, and the other end is provided with a locking head for locking after the rotating lifting lug, the main lifting beam and the positioning turntable are connected by the linkage shaft. The linkage shaft is also provided with a pin hole.

[0018] Preferably, the positioning pin includes a threaded section and a cylindrical pin section, and the positioning pin passes through the connecting hole of the rotating lug and is connected to the pin hole of the linkage shaft through the cylindrical pin section.

[0019] Preferably, the main lifting beam is a box girder structure, and the main lifting beam has connecting through holes at both ends for the linkage shaft to pass through. The main lifting beam also has positioning countersunk holes.

[0020] Preferably, it further includes a positioning pin sleeve and a positioning adjusting nut, the positioning pin sleeve and the positioning adjusting nut being connected, the positioning adjusting nut being used to drive the positioning pin sleeve to move, so that the positioning pin sleeve exits or enters the positioning countersunk hole of the main lifting beam, thereby realizing the unlocking or locking of the positioning turntable.

[0021] Preferably, the positioning and adjusting nut is in the shape of an "I" and has a threaded inner hole.

[0022] Preferably, the positioning pin sleeve includes a positioning end and a connecting end, the outer diameter of the connecting end is larger than the outer diameter of the positioning end, and the connecting end is provided with a locking threaded through hole in the radial direction.

[0023] Preferably, it further includes a lifting shaft and a locking plate. The main lifting beam has a shaft hole in the middle, the lifting shaft is disposed on the main lifting beam through the shaft hole, and the locking plate is fixedly disposed on the main lifting beam for axially limiting the lifting shaft.

[0024] Compared to the aforementioned background technology, the bidirectional rotating adjustable positioning hoisting equipment provided by this utility model connects the rotating lugs, main lifting beam, and positioning turntable via a linkage shaft. Through the bidirectional rotation of the rotating lugs at both ends, the hoisting equipment can retract and expand. In conjunction with the positioning turntable, the rotation control and positioning locking of the rotating lugs are precisely achieved. There is no need to make a separate opening on the hub fairing for the hoisting equipment, which can avoid the situation of disassembling or separating the fairing during installation and disassembly, causing damage to the fairing. This makes it simple and convenient to hoist the hub fairing assembly separately. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is an assembly diagram of the bidirectional rotating adjustable positioning hoisting equipment provided in an embodiment of the present utility model;

[0027] Figure 2 This is a structural diagram of the main lifting beam in a bidirectional rotating adjustable positioning hoisting device.

[0028] Figure 3 This is a schematic diagram of the rotating lifting lug in a bidirectional rotating adjustable positioning hoisting device.

[0029] Figure 4 This is a schematic diagram of the linkage shaft in a bidirectional rotating adjustable positioning hoisting device.

[0030] Figure 5 This is a schematic diagram of the positioning pin in a bidirectional rotating adjustable positioning hoisting device.

[0031] Figure 6 This is a schematic diagram of the positioning turntable in a bidirectional rotating adjustable positioning hoisting device.

[0032] Figure 7 This is a schematic diagram of the positioning pin sleeve in a bidirectional rotating adjustable positioning hoisting device.

[0033] Figure 8 This is a schematic diagram of the positioning and adjusting nut in a bidirectional rotary adjustable positioning hoisting device.

[0034] Figure 9 This is a schematic diagram of the locking plate in a bidirectional rotating adjustable positioning hoisting device.

[0035] Figures 1 to 9 Chinese figure reference numerals: 1. Rotating lifting lug; 11. Base plate; 111. Waist-shaped hole; 12. Connecting plate; 121. Mounting hole; 122. Connecting hole; 13. Rib plate; 2. Main lifting beam; 21. Connecting through hole; 22. Positioning countersunk hole; 23. Shaft hole; 3. Linkage shaft; 31. Connecting head; 32. Positioning retaining ring; 33. Locking head; 34. Pin hole; 4. Positioning pin; 41. Threaded section; 5. Positioning turntable; 51. Inner hole; 52. Positioning hole; 53. Slide groove; 6. Positioning pin sleeve; 61. Positioning end; 62. Connecting end; 621. Locking threaded through hole; 7. Positioning adjusting nut; 71. Threaded inner hole; 8. Lifting shaft; 9. Locking plate. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] This utility model provides a bidirectional rotating adjustable positioning hoisting device, which can hoist the hub fairing assembly without changing the shape and structure of the fairing. Together with the matching single blade hoisting device, it can complete the assembly of the wind turbine in the air.

[0039] Please refer to this as well. Figures 1 to 9 The bidirectional rotating adjustable positioning hoisting equipment provided by this utility model includes a main lifting beam 2, a rotating lifting lug 1, a positioning turntable 5, a linkage shaft 3, and a positioning pin 4.

[0040] The main lifting beam 2 is a welded component. Specifically, the main lifting beam 2 may include two side plates, one bottom plate, two upper web plates, several reinforcing steel plates, and reinforcing support steel pipes, which are welded together.

[0041] Rotary lifting lugs 1 are rotatably mounted at both ends of the main lifting beam 2, with two symmetrically arranged lugs 1 on the main lifting beam 2. The rotating lifting lugs 1 are the main load-bearing components connecting the hub and the lifting device, possessing high mechanical strength. Simultaneously, the rotating lifting lugs 1 can convert vertical directional forces under various working conditions into friction-driven contact forces, solving rigid constraints while allowing the lifting device's shape to contract and expand, eliminating the limitation imposed by the fairing on the maximum structural dimensions of the lifting device. Furthermore, the rotational lifting lugs 1, through their steering and positioning in different states, overcome the limitations imposed by the hub fairing on the lifting and installation states of the lifting device.

[0042] The positioning turntable 5 is located at the end of the main lifting beam 2, near the rotating lug 1. The linkage shaft 3 is used to connect the rotating lug 1, the main lifting beam 2, and the positioning turntable 5. The positioning pin 4 is located on the rotating lug 1 and is used to fix the linkage shaft 3 to the rotating lug 1 so that the linkage shaft 3 and the rotating lug 1 rotate synchronously.

[0043] The linkage shaft 3 combines and fixes the rotating lug 1, the main lifting beam 2, and the positioning turntable 5. After the rotating lug 1 rotates, it is locked, allowing the shape of the lifting device to retract and expand. When lifting the hub fairing assembly, the limitation of the fairing on the maximum structural size of the lifting device is eliminated. Moreover, the rotation and positioning of the rotating lug 1 in different states breaks through the limitation of the hub fairing on the lifting and installation state of the lifting device, making it flexible and convenient to use.

[0044] Please refer to this as well. Figure 1 and Figure 3 The rotating lug 1 includes a base plate 11, a connecting plate 12, and a stiffening plate 13.

[0045] The base plate 11 is horizontally positioned, and its bottom surface is configured to mate with the pitch bearing. The connecting plate 12 is vertically positioned and fixed to the base plate 11, with the side of the connecting plate 12 away from the base plate 11 being an arc-shaped surface. The arc-shaped top surface of the connecting plate 12 facilitates the rotation of the lifting lug 1 and avoids interference with other components. Rib plates 13 are located on both sides of the connecting plate 12 and are connected to the base plate 11 and the connecting plate 12. Specifically, the base plate 11, the connecting plate 12, and the rib plates 13 can be fixed by welding.

[0046] The connecting plate 12 is provided with a mounting hole 121, which is opened in the horizontal direction and is used to cooperate with the linkage shaft 3. The arc surface is provided with a connecting hole 122, which communicates with the mounting hole 121 and is used to cooperate with the positioning pin 4 to fix the linkage shaft 3 and the rotating lug 1.

[0047] In addition, the base plate 11 has four oblong holes 111 at its front end, which are evenly distributed on both sides of the connecting plate 12. Bolts can be used to connect and fix the component to be hoisted through these oblong holes 111. Two positioning steel parts are also fixed on the base plate 11. The two positioning steel parts are welded to the front end of the base plate 11 and are symmetrically distributed on both sides of the connecting plate 12.

[0048] Please refer to this as well. Figure 1 and Figure 6 The positioning turntable 5 is disc-shaped, and has an inner hole 51 in the center for cooperating with the linkage shaft 3. The inner hole 51 is polygonal. The positioning turntable 5 also has a positioning part, which includes at least two positioning holes 52 arranged around the circumference of the positioning turntable 5. The positioning holes 52 are connected by a sliding groove 53, which extends around the circumference of the positioning turntable 5.

[0049] Please refer to this as well. Figure 1 and Figure 4 One end of the linkage shaft 3 is provided with a hexagonal connector 31 and a positioning retaining ring 32. The positioning retaining ring 32 is used to abut against the end face of the main lifting beam 2. The other end of the linkage shaft 3 is provided with a locking head 33 and a screw section. The locking head 33 is used to lock the rotating lifting lug 1, the main lifting beam 2 and the positioning turntable 5 after they are connected by the linkage shaft 3. The linkage shaft 3 is also provided with a pin hole 34, which is located in the middle of the linkage shaft 3.

[0050] Please refer to this as well. Figure 1 and Figure 5 The positioning pin 4 includes a threaded section 41 and a cylindrical pin section. After passing through the connecting hole 122 of the rotating lug 1, the positioning pin 4 is connected to the pin hole 34 of the linkage shaft 3 through the cylindrical pin section. Specifically, the threaded section 41 and the cylindrical pin section are coaxially fixed. The end of the threaded section 41 away from the cylindrical pin section is provided with a hexagonal head. The positioning pin 4 radially positions the rotating lug 1 and the linkage shaft 3 as one unit, realizing synchronous rotation.

[0051] Please refer to this as well. Figures 1 to 2 The main lifting beam 2 is a box beam structure. Both ends of the main lifting beam 2 are provided with connecting through holes 21 for the linkage shaft 3 to pass through. The main lifting beam 2 is also provided with positioning countersunk holes 22.

[0052] Please refer to this as well. Figure 1 , Figures 7 to 8 The bidirectional rotary adjustable positioning hoisting device provided by this utility model also includes a positioning pin sleeve 6 and a positioning adjusting nut 7. The positioning pin sleeve 6 and the positioning adjusting nut 7 are connected. The positioning adjusting nut 7 is used to drive the positioning pin sleeve 6 to move, so that the positioning pin sleeve 6 exits or enters the positioning countersunk hole 22 of the main lifting beam 2, so as to realize the unlocking or locking of the positioning turntable 5.

[0053] The positioning turntable 5 is located on the outside of the main lifting beam 2, making it convenient for personnel to operate and providing a clear view of the rotation and positioning position. The positioning turntable 5 transfers the steering and positioning function of the rotating lug 1 to the outside of the main lifting beam 2, eliminating the spatial limitations of the inner side of the main lifting beam 2, while simultaneously achieving precise and synchronous steering of both.

[0054] Please refer to this as well. Figure 1 , Figures 7 to 8 The positioning adjusting nut 7 is I-shaped and has a threaded inner hole 71. The outer circle of the positioning adjusting nut 7 serves as a positioning connection, while the threaded inner hole 71 serves as a forward and backward driving positioning function. By driving the positioning pin sleeve 6 forward and backward through the positioning adjusting nut 7, positioning is achieved while avoiding the possibility of locking up.

[0055] Please refer to this as well. Figure 1 , Figures 7 to 8 The positioning pin sleeve 6 includes a positioning end 61 and a connecting end 62. The outer diameter of the connecting end 62 is larger than the outer diameter of the positioning end 61, so that the positioning pin sleeve 6 is stepped in shape. The positioning end 61 with a smaller outer diameter serves as the positioning side, and the connecting end 62 is provided with a locking threaded through hole 621 in the radial direction.

[0056] The positioning pin sleeve 6 has a wide-clearance axial rapid sliding function, which can prevent the positioning turntable 5 from getting stuck due to deformation under force during repeated positioning.

[0057] Please refer to this as well. Figure 1 and Figure 9 The bidirectional rotary adjustable positioning hoisting device provided by this utility model also includes a lifting shaft 8 and a locking plate 9. A shaft hole 23 is provided in the middle of the main lifting beam 2, and the lifting shaft 8 is mounted on the main lifting beam 2 through the shaft hole 23. Specifically, the lifting shaft 8 is a precision-machined round shaft, ensuring that the crane's lifting strap can withstand force at any angle without restriction. By placing the lifting shaft 8 into different lifting hole positions, different lifting angle requirements can be achieved, offering flexibility and convenience. The locking plate 9 is fixedly mounted on the main lifting beam 2 and is used to axially limit the lifting shaft 8.

[0058] Specifically, the main lifting beam 2 has threaded holes in its middle for installing locking plates 9. Locking plates 9 are fixed to the main lifting beam 2 through these threaded holes. Located at both ends of the lifting shaft 8, locking plates 9 axially limit the lifting shaft 8, preventing uneven force distribution during lifting of heavy objects and thus preventing the lifting shaft 8 from detaching from the main lifting beam 2. While locking plates 9 axially restrict the lifting shaft 8 from detaching after fixing, they do not restrict its rotation or the force it receives.

[0059] It should be noted that all bolts, nuts and other connecting parts of the hoisting equipment are general standard products to ensure the universality of the disassembly and assembly of the entire set of tooling and hoisting equipment.

[0060] The installation and use process of the bidirectional rotating adjustable positioning hoisting equipment provided by this utility model is as follows (for ease of description, the two ends of the main hoisting beam 2 are respectively referred to as end A and end B):

[0061] When assembling the lifting equipment onto the wheel hub fairing assembly, first adjust the rotating lug 1 at end A, then rotate the positioning adjusting nut 7. The positioning adjusting nut 7 will cause the positioning pin sleeve 6 to retract from the main lifting beam 2. Rotate the rotating lug 90° clockwise. At this time, the positioning turntable 5 will simultaneously rotate 90° clockwise. Rotate the positioning adjusting nut 7 again to cause the front end of the positioning pin sleeve 6 to pass through the positioning countersunk hole 22 of the main lifting beam 2. The positioning pin sleeve 6 will lock the positioning turntable 5, and the positioning turntable 5 will simultaneously lock the linkage shaft 3. Next, adjust the rotating lug 1 at end B, then rotate the positioning adjusting nut 7 to cause the positioning pin sleeve 6 to retract from the main lifting beam 2. Rotate the rotating lug 45° clockwise. The positioning turntable 5 will simultaneously rotate 45° clockwise. Rotate the positioning adjusting nut 7 again to cause the front end of the positioning pin sleeve 6 to pass through the positioning countersunk hole 22 of the main lifting beam 2.

[0062] After both the A-end and B-end rotating lugs 1 are locked, according to the required lifting angle of different platform designs, the lifting shaft 8 is inserted into the corresponding intermediate shaft hole 23 of the main lifting beam 2, and both ends are locked with locking plates 9. The crane sling passes through the lifting shaft 8 to lift the equipment. After being lifted and suspended in the air, it is basically in a horizontal state. The lifting equipment is moved close to the pitch bearing surface of the hub fairing assembly. The A-end rotating lug 1 is slowly moved away from the inner ring of the fairing and continues to rise until it is close to the uppermost position of the pitch bearing end face. Bolts are inserted into the A-end rotating lug 1 to fix it to the hub. At this time, the fixing bolts of the A-end rotating lug 1 are not locked. The lifting device is slightly lifted, and the positioning adjusting nut 7 is rotated to remove the positioning pin sleeve 6 to release the lock of the A-end positioning turntable 5. The lifting device and sling are slowly lowered. The lifting device is now under the weight of the crane sling. Rotate downwards. When the front of end B passes the inner ring end face of the fairing, the operator uses a wrench to fix the bolt head of the linkage shaft 3 on the side of the non-locking positioning turntable 5 at end B. Press the wrench down forcefully and at the same time remove the positioning pin sleeve 6 on the other side of end B. Then, the operator works with the crane to make the rotating lug 1 at end B also close to the pitch bearing end face. Use a fixing bolt to pass through the rotating lug 1 at end B and connect it to the hub. Slightly adjust the main lifting beam 2 to drive the rotating lugs 1 at ends A and B to a basically symmetrical state. Finally, completely lock the fixing bolts on both sides of the rotating lug 1.

[0063] When disassembling the hoisting equipment, the hoisting equipment is basically in a horizontal position on the upper side of the hub fairing. The crane slightly lifts the slings passing through the lifting shaft 8. The installers remove the fixing bolts of the rotating lugs 1 at ends A and B, manually remove the positioning pin sleeves 6 at both ends, release the locking of the positioning turntable 5, and release the rotating lugs 1 at both ends to rotate freely. The crane lifts the hoisting equipment, and the rotating lugs 1 on both sides rotate downwards by 45° to basically be in a vertical position. At this time, the maximum size of the hoisting equipment is within the minimum inner diameter range of the fairing, and it can be safely lifted away from the hoisting equipment.

[0064] The bidirectional rotating adjustable positioning hoisting device provided by this utility model realizes the shrinking and unfolding deformation of the hoisting device through the bidirectional rotation of the rotating lugs 1 at both ends. With the help of the positioning turntable 5, the rotation control and positioning locking of the rotating lugs 1 are accurately realized. The lifting angle is adjustable. There is no need to make a separate opening on the hub fairing for the hoisting device. This can avoid the situation of disassembling or separating the fairing during installation and disassembly, which would cause damage to the fairing. It makes the separate hoisting of the hub fairing assembly simple and convenient.

[0065] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0066] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A bidirectional rotating adjustable positioning hoisting device, characterized in that, include: Main lifting beam; Rotary lifting lugs are rotatably mounted at both ends of the main lifting beam; A positioning turntable is located at the end of the main lifting beam, near the rotating lifting lug; A linkage shaft is used to connect the rotating lug, the main lifting beam, and the positioning turntable. A positioning pin is provided on the rotating lug to fix the linkage shaft and the rotating lug so that the linkage shaft and the rotating lug rotate synchronously.

2. The bidirectional rotating adjustable positioning hoisting equipment according to claim 1, characterized in that, The rotating lug includes: The base plate is set horizontally. A connecting plate is vertically installed and fixed to the base plate, with the side of the connecting plate away from the base plate being an arc-shaped surface; Rib plates are located on both sides of the connecting plate and are connected to the base plate and the connecting plate; The connecting plate is provided with mounting holes for engaging with the linkage shaft, and the arc-shaped surface is provided with connecting holes for engaging with the positioning pins to fix the linkage shaft and the rotating lug.

3. The bidirectional rotating adjustable positioning hoisting equipment according to claim 2, characterized in that, The positioning turntable has an inner hole in the middle for cooperating with the linkage shaft. The positioning turntable also has a positioning part, which includes at least two positioning holes arranged along the circumference of the positioning turntable. The positioning holes are connected by a sliding groove, which extends along the circumference of the positioning turntable.

4. The bidirectional rotating adjustable positioning hoisting equipment according to claim 3, characterized in that, One end of the linkage shaft is provided with a positioning retaining ring for abutting against the end face of the main lifting beam, and the other end is provided with a locking head for locking the rotating lug, the main lifting beam and the positioning turntable after they are connected by the linkage shaft. The linkage shaft is also provided with a pin hole.

5. The bidirectional rotating adjustable positioning hoisting equipment according to claim 4, characterized in that, The positioning pin includes a threaded section and a cylindrical pin section. After passing through the connecting hole of the rotating lug, the positioning pin is connected to the pin hole of the linkage shaft through the cylindrical pin section.

6. The bidirectional rotating adjustable positioning and hoisting equipment according to any one of claims 1 to 5, characterized in that, The main lifting beam is a box girder structure, and there are connecting through holes at both ends of the main lifting beam for the linkage shaft to pass through. The main lifting beam is also provided with positioning countersunk holes.

7. The bidirectional rotating adjustable positioning hoisting equipment according to claim 6, characterized in that, It also includes a positioning pin sleeve and a positioning adjusting nut. The positioning pin sleeve and the positioning adjusting nut are connected. The positioning adjusting nut is used to drive the positioning pin sleeve to move, so that the positioning pin sleeve exits or enters the positioning countersunk hole of the main lifting beam, so as to unlock or lock the positioning turntable.

8. The bidirectional rotating adjustable positioning hoisting equipment according to claim 7, characterized in that, The positioning and adjusting nut is in the shape of an "I" and has a threaded inner hole.

9. The bidirectional rotating adjustable positioning hoisting equipment according to claim 8, characterized in that, The positioning pin sleeve includes a positioning end and a connecting end. The outer diameter of the connecting end is larger than the outer diameter of the positioning end, and the connecting end is provided with a locking threaded through hole in the radial direction.

10. The bidirectional rotating adjustable positioning and hoisting equipment according to claim 1, characterized in that, It also includes a lifting shaft and a locking plate. The main lifting beam has a shaft hole in the middle. The lifting shaft is disposed on the main lifting beam through the shaft hole. The locking plate is fixedly disposed on the main lifting beam and is used to axially limit the lifting shaft.

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