A Lower Chord Self-Tensioning Hoisting Adjustment Unit, Hoisting Assembly and Hoisting System

Abstract

The present application relates to a lower chord self-tensioning hoisting adjustment unit, which includes a connecting longitudinal beam and an adjusting cantilever assembly and a top abutting assembly that are rotatably adjustable and arranged on both sides of the connecting longitudinal beam in the length direction; any adjusting cantilever assembly is provided with an upper hoisting rigging, any adjusting cantilever assembly is provided with a hoisting portion, and a bottom pocket rigging is provided between the hoisting portions of the two adjusting cantilever assemblies; the present application improves the hoisting efficiency of special-shaped parts. The present application also relates to a hoisting assembly, including a lower chord self-tensioning hoisting adjustment unit and a hoisting crossbeam, and the connecting longitudinal beam is provided with multiple adjustable crossbeams along the length direction of the hoisting crossbeam; the present application improves the adjustment dimension of long-rod special-shaped parts. The present application also relates to a hoisting system, including at least two hoisting assemblies, a hoisting main crossbeam, and a main rigging. The present application greatly improves the hoisting efficiency of different oblique installation positions on the same plane.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting equipment, and in particular to a lower chord self-tensioning hoisting adjustment unit, a hoisting assembly and a hoisting system. Background Art

[0002] Against the backdrop of China's dual carbon strategy, demand for recyclable, clean energy is growing stronger. The construction of power plants that utilize the Earth's fluid energy, such as wind, hydro, and tidal energy, will increase. The construction of these power plants often requires hoisting components with special cross-sections, such as wind turbine blades, wind turbine towers, and turbine blades.

[0003] In related technologies, rigid arm C-type or SC-type slings are often used for clamping and lifting operations. During the lifting process, the following technical problems exist:

[0004] ① The versatility is not strong, and the clamp body needs to be replaced as a whole or partially to adapt to the requirements of different sizes and shapes, and the structure is complicated;

[0005] ② During the installation process, the alignment of the fan blades and the hub is usually ensured by manually pulling a hoist or connecting ropes. Due to the limited installation space, there are certain risks to personnel safety and the operation is inconvenient.

[0006] ③ The detachment operation of the slings in the related art is often difficult. Most of the time, the slings need to be manually disassembled from the lifting components. In some cases, the posture of the clamping structure changes after the load is unloaded, and the posture of the clamping structure needs to be readjusted.

[0007] ④ For single blade hoisting technology, it is installed horizontally and aligned, and the position of the hub needs to be adjusted each time it is installed.

[0008] The above will greatly affect the overall lifting efficiency during the entire lifting operation, and there is room for improvement. Summary of the Invention

[0009] In order to improve the lifting efficiency, the present application provides a lower chord self-tensioning lifting adjustment unit.

[0010] The present application provides a lower chord self-tensioning hoisting adjustment unit that adopts the following technical solution:

[0011] A lower chord self-tensioning hoisting adjustment unit comprises a connecting longitudinal beam and an adjusting cantilever assembly rotatably and adjustably arranged on both sides of the connecting longitudinal beam in the length direction, wherein an upper hoisting rigging is provided at an end of each adjusting cantilever assembly away from its rotating connection, and each adjusting cantilever assembly is provided with a hoisting portion, and a bottom sling for slinging special-shaped parts is provided between the hoisting portions of the two adjusting cantilever assemblies;

[0012] The utility model also comprises a top abutting assembly which is adjustable in height and is arranged at the bottom of the connecting longitudinal beam and is used for abutting the top of the special-shaped piece.

[0013] By adopting the above technical solution, the bottom pocketing rigging can be used to pocket the special-shaped parts with special-shaped cross-sections, and then the upper lifting rigging can be used to hook it on the crane or lifting sling, so as to facilitate the adjustment of the overall installation position; at this time, the cantilever assembly is pulled upward by the upper lifting rigging and swings upward, and under the action of the self-weight of the special-shaped part, the bottom pocketing rigging pockets the bottom of the special-shaped part, and then the top lifting assembly of the lifting arrangement is used to abut against the top of the special-shaped part, so as to realize automatic clamping and clamping of the special-shaped part, and the connecting longitudinal beam and the rotatable adjustable cantilever assembly on both sides thereof, plus the top abutting assembly, the bottom pocketing rigging and the hoisted special-shaped part form a lower chord structure, which can be applied to various special-shaped parts, thereby greatly improving the versatility of the sling;

[0014] When disengaging, it is only necessary to adjust the rotation angle of the adjustable cantilever assemblies on both sides so that the adjustable cantilever assemblies on both sides rotate in the direction of approaching each other along the bottom side, so that the bottom pocket rigging is in a relaxed state, and the disengagement operation of the special-shaped cross-section parts can be completed, which is convenient and quick;

[0015] In addition, the adjustable cantilever components arranged on both sides of the connecting longitudinal beam can be rotated and adjusted to adjust the rotation angles of the adjustable cantilever components on both sides. Through different rotation angles, different tensioning degrees of the bottom hoisting rigging on the left and right sides can be achieved. In combination with the deadweight of the special-shaped cross-section parts, the pitch direction angle of the special-shaped cross-section parts can be adjusted. During the hoisting operation, the installation angle of the special-shaped cross-section parts can be directly adjusted.

[0016] For long-rod special-shaped parts such as blades and towers, a transmission pocket-mounted lifting device can be used to automatically clamp and fix these special-shaped parts, quickly remove the materials, and accurately adjust the installation position, thereby improving the lifting efficiency.

[0017] Preferably, a plurality of the hoisting parts are provided along the length direction of the adjustable cantilever assembly.

[0018] By adopting the above technical solution, multiple hoisting parts are arranged along the length direction of the adjustable cantilever assembly, thereby adjusting the distance between the two hoisting positions of the bottom pocketing rigging, and further adapting to pocketing operations with different cross-sectional areas.

[0019] Preferably, the top abutment assembly includes a transverse swing frame that is adjustable in height and is arranged at the bottom of the connecting longitudinal beam, and a pressing block arranged on the transverse swing frame for abutting the top of the special-shaped part, and a rotational connection is formed between the transverse swing frame and the connecting longitudinal beam.

[0020] By adopting the above technical solution, during the actual abutment operation, the horizontal swing frame with adjustable lifting setting is used to adapt to the abutment height of different cross-sections. At the same time, the rotational connection between the horizontal swing frame and the connecting longitudinal beam is used. On the one hand, it can adapt to different cross-sectional shapes. As the cantilever assembly is adjusted to fine-tune the pitch angle of the special-shaped part, it can also adapt to the cross-sectional shapes of the special-shaped part at different angles.

[0021] Preferably, the adjustable cantilever assembly includes a first cantilever and a second cantilever whose ends are rotatably connected to the connecting longitudinal beam, the upper lifting rigging is arranged at the other end of the first cantilever, and a second distance adjustment mechanism for adjusting the distance between the first cantilever and the second cantilever is provided between the first cantilever and the second cantilever, the lifting part is arranged on the second cantilever, and the rotation axis of the first cantilever and the second cantilever is parallel to the length direction of the lifting beam.

[0022] By adopting the above technical solution, the second distance adjustment mechanism between the first cantilever and the second cantilever is used to adjust the distance between the first cantilever and the second cantilever, thereby changing the height of the lifting part on the second cantilever. When two lower chord self-tensioning lifting adjustment units are used for lifting operations, the height of the lifting part in one of the lower chord self-tensioning lifting adjustment units is changed, thereby adjusting the inclination angle of the special-shaped part to adapt to lifting and installation operations on different inclined surfaces.

[0023] Preferably, the second distance adjustment mechanism includes a connecting rod assembly, one end of the connecting rod assembly is rotatably connected to the first cantilever, the other end of the connecting rod assembly is rotatably connected to the second cantilever, and the rotation axis of the connecting rod assembly is parallel to the rotation axis of the first cantilever.

[0024] By adopting the above technical solution, a connecting rod assembly is utilized between the first cantilever and the second cantilever, and a four-bar linkage is formed between the first cantilever, the second cantilever, the connecting longitudinal beam and the connecting rod assembly. As the rotation angle of the first cantilever changes, the rotation angle of the second cantilever is adjusted, thereby realizing the distance adjustment operation between the first cantilever and the second cantilever.

[0025] Preferably, the connecting rod assembly forms a detachable fixed connection with the rotation connection between the first cantilever and the second cantilever.

[0026] By adopting the above technical solution, the detachable fixed connection formed by the connecting rod assembly along the length direction of the first cantilever and the second cantilever can be realized by replacing the connecting rod assemblies of different lengths to achieve the distance adjustment function between the first cantilever and the second cantilever.

[0027] Preferably, the first cantilever and the second cantilever are provided with a plurality of detachable fixed connections with the connecting rod assembly along their respective length directions.

[0028] By adopting the above technical solution, the positions of the rotating connections at both ends of the connecting rod assembly are changed, so as to achieve the function of adjusting the distance between the first cantilever and the second cantilever without changing the connecting rod assembly.

[0029] Preferably, the second distance adjusting mechanism includes a connecting rope body fixedly arranged on the first cantilever and the second cantilever and a retractable assembly for retracting and extending the connecting rope body.

[0030] By adopting the above technical solution, since the connecting rope body is always in a taut state during the lifting process, the retraction and extension operation of the connecting rope body is realized by using the retraction and extension assembly, thereby greatly improving the convenience and accuracy of adjusting the distance of the first cantilever and the second cantilever.

[0031] Preferably, the retracting and unretracting assembly includes a mounting frame, a fixed pulley, a winch and a movable pulley, the mounting frame is detachable and fixed on the first cantilever, the fixed pulley is rotatably connected to the mounting frame, the winch is fixed on the mounting frame and coaxially fixedly connected to the fixed pulley, the movable pulley is rotatably connected to the second cantilever, one end of the connecting rope is fixedly wound around the winch, and the other end of the connecting rope is sequentially wound around the fixed pulley and the movable pulley and fixed on the mounting frame, and the rotation axes of the winch, fixed pulley and movable pulley are parallel to the rotation axis of the first cantilever.

[0032] By adopting the above technical solution, in actual use, a winch is used to realize the winding and unwinding operation of the fixed pulley on the connecting rope body. Since the connecting rope body is wound on the movable pulley, the movable pulley is raised and lowered as the connecting rope body is wound and unwound, thereby realizing the second cantilever to rotate in the direction of approaching or moving away from the first cantilever, and realizing the distance adjustment operation between the first cantilever and the second cantilever. Moreover, this distance adjustment method uses the movable and fixed pulley rope group to reduce the load on the winding and unwinding components.

[0033] In order to increase the efficiency of position adjustment of long-rod special-shaped parts, the present application also provides a sling assembly.

[0034] The present application provides a sling assembly that adopts the following technical solution:

[0035] A sling assembly comprises a lower chord self-tensioning hoisting adjustment unit and a hoisting crossbeam. A plurality of connecting longitudinal beams are adjustable along the length direction of the hoisting crossbeam.

[0036] By adopting the above technical solution, in actual use, by setting multiple connecting longitudinal beams on the lifting beam, that is, setting multiple lower chord self-tensioning lifting adjustment units along the length direction of the lifting beam, it is possible to achieve self-tensioning clamp fixation, quick material removal and precise position adjustment operations at different cross sections of long rod-type special-shaped parts.

[0037] In order to improve the lifting efficiency at different oblique positions on both sides of the same plane, the present application also provides a lifting device system.

[0038] The present application provides a sling system that adopts the following technical solutions:

[0039] A sling system includes at least two self-tensioning hoisting adjustment units for lower chords that can adapt to irregular cross-sections, and also includes a hoisting main beam. The end of the upper rigging away from the first cantilever is fixedly arranged on the hoisting main beam, and the hoisting main beam is provided with a main rigging for hooking a crane's locking hook.

[0040] By adopting the above technical solution, the upper rigging can be fixed on the lifting longitudinal beam, thereby completing the installation of at least two lower chord self-tensioning lifting adjustment units on the lifting main beam, and then completing the lifting operation of multiple special-shaped parts in the same plane within the plane where the lifting main beam is located, and in the lifting operation of each special-shaped part, the position adjustment of the special-shaped part and the fine adjustment of the pitch angle can be achieved.

[0041] In summary, this application includes at least one of the following beneficial technical effects:

[0042] 1. By utilizing multiple lifting parts arranged along the length direction of the second cantilever, the lifting position on the bottom pocket rigging is made more flexible, and the inner wrap angle of the bottom pocket rigging is adjusted within an appropriate angle. At the same time, it can also adapt to different lengths of the bottom pocket rigging; and it is more suitable for special-shaped parts with different cross-sectional areas; the bottom pocket rigging adopts a sling or rope with good winding properties, which can adapt to various special-shaped cross-sectional shapes, thereby greatly improving the versatility of this application.

[0043] 2. The present application utilizes the deadweight of the special-shaped part in combination with the upward lifting traction force to realize the automatic rotation of the first cantilever and the second cantilever, realizes the scooping operation of the bottom scooping rigging, and then realizes the pre-locking of the special-shaped part. After that, combined with the top abutment component, the self-locking operation of the special-shaped part can be realized.

[0044] 3. The first distance adjustment mechanism between the first rotating seat and the second rotating seat is used to make the force more reasonable. The angle between the two first cantilevers is small when lifting. When unlocking, the spreader will only be subjected to the deadweight load of the spreader, which helps to improve the service life of the first distance adjustment mechanism.

[0045] 4. The first and second cantilevers are connected on the longitudinal beam, and the winch pulley system between the first and second cantilevers allows the load to be deflected at a large angle in the lateral direction of the spreader. This increases the spreader's freedom of movement and makes it more convenient and flexible.

[0046] 5. The lifting system of this application can be applied to the lifting of double-head towers or double-blade angles, filling the domestic gap. It can not only meet the lifting stability requirements of offshore floating wind turbine foundations, but also reduce the unbalanced bending moment of the tower foundation during blade lifting, thereby improving lifting efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic diagram of the embodiment 1 of the lower chord self-tensioning hoisting adjustment unit, which mainly shows the overall structure from a front view perspective;

[0048] Figure 2 This is a first embodiment of the lower chord self-tensioning hoisting adjustment unit, which mainly shows a front view of the lower chord self-tensioning hoisting adjustment unit in an adjustment state;

[0049] Figure 3 This is a schematic diagram of the first embodiment of the lower chord self-tensioning hoisting adjustment unit, which mainly reflects the structure of the top abutment component;

[0050] Figure 4 This is a second embodiment of the lower chord self-tensioning hoisting adjustment unit, which mainly shows a schematic diagram of the overall structure from a frontal perspective;

[0051] Figure 5 This is a third embodiment of the lower chord self-tensioning hoisting adjustment unit, which mainly shows a schematic diagram of the overall structure from a frontal perspective;

[0052] Figure 6 This is the first embodiment of the hoisting assembly, which mainly shows a partial cross-sectional view of the overall structure from a frontal perspective;

[0053] Figure 7 for Figure 6 The partial enlarged view of part A in the middle mainly shows the structural diagram of the plug pin and the plug pin hole;

[0054] Figure 8 This is the first embodiment of the hoisting assembly, which mainly shows the side view of the overall structure;

[0055] Figure 9 This is the second embodiment of the hoisting assembly, which mainly shows the side view of the overall structure;

[0056] Figure 10 This is an embodiment of the hoisting system, which mainly shows the front view of the overall structure from a front perspective.

[0057] Figure numerals: 1. Connecting longitudinal beam; 11. Connecting pin; 2. Adjusting cantilever assembly; 21. First cantilever; 211. Hoisting part; 22. First distance adjusting mechanism; 221. First rotating seat; 222. Second rotating seat; 223. Linear cylinder; 23. Second cantilever; 24. Second distance adjusting mechanism; 241. Connecting rod; 242. Connecting rope body; 243. Retracting and releasing assembly; 2431. Mounting frame; 2432. Fixed pulley; 2433. Winch; 2434. Movable pulley; 3. Upper lifting rigging; 4. Bottom pocket rigging; 5. Top abutting assembly; 51. Lifting cylinder; 52. Horizontal swing frame; 53. Pressing block; 6. Hoisting beam; 61. Pin hole; 7. Hoisting main beam; 8. Main rigging. DETAILED DESCRIPTION

[0058] The following is combined with Figure 1-10 This application is described in further detail.

[0059] The embodiment of the present application discloses a lower chord self-tensioning hoisting adjustment unit.

[0060] Example 1

[0061] Reference Figure 1 The lower chord self-tensioning hoisting adjustment unit includes a connecting longitudinal beam 1 and an adjustable cantilever assembly 2 that is rotatably arranged on both sides of the connecting longitudinal beam 1 in the length direction. The rotation axis of any adjustable cantilever assembly 2 is perpendicular to the length direction of the connecting longitudinal beam 1. The end of any adjustable cantilever assembly 2 away from its rotation connection is provided with an upper hoisting rigging 3, and the upper hoisting rigging 3 can be directly hooked with the lifting hook of the crane or connected to other hoisting equipment.

[0062] Reference Figure 1 It also includes a bottom pocketing rigging 4 arranged between the two adjustable cantilever assemblies 2 for pocketing the special-shaped parts, and a top abutting assembly 5 that is adjustable in height and arranged at the bottom of the connecting longitudinal beam 1 for abutting the top of the special-shaped parts.

[0063] In actual use, the bottom pocketing rigging 4 and the upper lifting rigging 3 are used, and combined with the deadweight of the special-shaped part and the top abutment component 5, the special-shaped part is pocketed and self-locked, and a plurality of lower chord self-tensioning lifting adjustment units are provided to adjust the inclination angle of the special-shaped part. The lower chord self-tensioning lifting adjustment unit can use the adjustable cantilever component 2 to adjust the inner angle β of the bottom pocketing rigging 4, so as to fine-tune the pitch angle of the special-shaped part and complete precise installation adjustment.

[0064] Since the structures and installation methods of the adjusting cantilever assemblies 2 on both sides are the same, the adjusting cantilever assemblies 2 on the same side are taken as an example for explanation.

[0065] Reference Figure 1 and Figure 2 The adjustable cantilever assembly 2 includes a first cantilever 21, one end of the first cantilever 21 is rotatably connected to the longitudinal beam, the upper lifting rigging 3 is arranged at the end of the first cantilever 21 away from its rotating connection, and the middle section of the first cantilever 21 is provided with multiple lifting parts 211 along its length direction, and the lifting parts 211 can be set as lifting ear plates; the bottom pocket rigging 4 is arranged on the lifting parts 211 of the two first cantilevers 21; the adjustable cantilever assembly 2 also includes a first distance adjustment mechanism 22 arranged between the first cantilever 21 and the connecting longitudinal beam 1.

[0066] Reference Figure 1 and Figure 2 , the first distance adjusting mechanism 22 can be set as a linear transmission mechanism, the linear transmission mechanism can include a linear oil cylinder 223, a gear rack, a screw nut, etc., and can also be set as a connecting rod transmission mechanism to achieve the purpose of adjusting the distance between the first rotating seat 221 and the second rotating seat 222. In the embodiment of the present application, the first distance adjusting mechanism 22 includes a first rotating seat 221, a second rotating seat 222 and a linear oil cylinder 223. The first rotating seat 221 is rotatably connected to the first cantilever 21, and the second rotating seat 222 is rotatably connected to the connecting longitudinal beam 1. The first The rotation axis of the rotating seat 221 and the second rotating seat 222 is parallel to the rotation axis of the first cantilever 21; the bottom end of the cylinder body of the linear cylinder 223 is fixed on the first rotating seat 221, and the end of the piston rod of the linear cylinder 223 is fixed on the second rotating seat 222, and a displacement detection electronic module is provided on the linear cylinder 223 for adjusting the extension and contraction amount of the linear cylinder 223; the extension and contraction stroke of the two linear cylinders 223 can be adjusted by the PLC control in the displacement detection electronic module, thereby realizing the rotation angle of the two first cantilevers 21.

[0067] Reference Figure 2 and Figure 3 The top abutment assembly 5 includes a lifting cylinder 51, a transverse swing frame 52 and a pressing block 53. The cylinder body of the lifting cylinder 51 is fixed to the bottom of the connecting longitudinal beam 1, and the piston rod of the lifting cylinder 51 is set vertically downward. The transverse swing frame 52 is rotatably connected to the end of the piston rod of the lifting cylinder 51 through a pin shaft. Two pressing blocks 53 are arranged at intervals along the length direction of the transverse beam and are fixed to the bottom of the transverse swing frame 52. As the lifting cylinder 51 extends and contracts, the pressing block 53 abuts against the side wall of the radial top of the special-shaped part, thereby achieving safe locking of the special-shaped part.

[0068] The implementation principle of the lower chord self-tensioning sling adjustment unit in the embodiment of the present application is as follows:

[0069] For block-shaped special-shaped parts with special-shaped cross-sections, the bottom pocketing rigging 4 is used to pocket the special-shaped parts, and the bottom pocketing rigging 4 can be made of a sling or rope with good flexibility and a certain friction force; then, the upper lifting rigging 3 is used to hook it on a crane or lifting sling, so as to facilitate the adjustment of the overall installation position; at this time, the two first cantilevers 21 are pulled upward by the upper lifting rigging 3 and swing upward. At this time, the two linear cylinders 223 are in a free state, that is, under the action of the self-weight of the special-shaped part, the bottom pocketing rigging 4 pockets the bottom of the special-shaped part, and then the lifting cylinder 51 is used to drive the pressing block 53 to descend to abut against the top of the special-shaped part, thereby achieving the fixation and clamping of the blade or tower with special-shaped cross-section, thereby greatly improving the versatility of the sling;

[0070] When it is necessary to disengage, the two linear cylinders 223 are used to greatly adjust the angle between the two upper lifting riggings 3 and the vertical line. It is only necessary to adjust the two linear cylinders 223 to extend and increase the angle between the two upper lifting riggings 3, so that the bottom pocket rigging 4 is in a relaxed state, and the detachment operation of the special-shaped cross-section part can be completed, which is convenient and quick.

[0071] Reference Figure 2 By slightly adjusting the telescopic stroke of the two linear cylinders 223, the tension levels of the bottom lifting rigging on the left and right sides are changed, that is, the inner wrap angle of the bottom lifting rigging is changed, and combined with the deadweight of the special-section special-shaped parts, the pitch direction angle of the special-section special-shaped parts can be adjusted. During the lifting operation, the installation angle of the special-section special-shaped parts can be directly adjusted.

[0072] Example 2

[0073] Reference Figure 4 The difference between this embodiment and embodiment 1 is that:

[0074] In the embodiment of the present application, the adjustable cantilever assembly 2 on this side further includes a second cantilever 23. In other embodiments, the adjustable cantilever assembly 2 may further include a third cantilever and multiple cantilever arms rotatably connected to the connecting longitudinal beam 1, depending on the usage and hoisting conditions. One end of the second cantilever 23 is rotatably connected to the mounting longitudinal beam and is located below the first cantilever 21. In the embodiment of the present application, a hoisting portion 211 is provided on the second cantilever 23 and multiple portions are provided along its length. The bottom pocket rigging 4 is provided on the hoisting portions 211 of the two second cantilever arms 23. The adjustable cantilever assembly 2 also includes a second distance adjustment mechanism 24 disposed between the first cantilever 21 and the second cantilever 23.

[0075] Reference Figure 4The second distance adjusting mechanism 24 is configured as a connecting rod assembly, which may include a plurality of connecting rods 241 rotatably connected end to end, wherein the ends of the connecting rods 241 at both ends are rotatably connected to the first cantilever 21 and the second cantilever 23 respectively. In the embodiment of the present application, the connecting rod assembly is configured as a connecting rod 241, one end of the connecting rod 241 is rotatably connected to the first cantilever 21, and the other end of the connecting rod 241 is rotatably connected to the second cantilever 23, and the rotation axis of the connecting rod 241 is parallel to the rotation axis of the first cantilever 21, wherein both ends of the connecting rod 241 are detachably fixedly connected to the first cantilever 21 and the second cantilever 23 through a pin shaft and a pin hole, and the first cantilever 21 and the second cantilever 23 are provided with a plurality of pin holes along their respective length directions to form a detachable and fixed connection with the end of the connecting rod 241.

[0076] The implementation principle of the lower chord self-tensioning sling adjustment unit in the embodiment of the present application is as follows:

[0077] In actual operation, the operator can adjust the distance between the first cantilever 21 and the second cantilever 23 by replacing the connecting rod 241 of different lengths, or by connecting the connecting rod 241 of the same length to different pin holes of the first cantilever 21 and the second cantilever 23 respectively, thereby achieving the purpose of adjusting the first cantilever 21 and the second cantilever 23.

[0078] Example 3

[0079] Reference Figure 5 The difference between this embodiment and embodiment 1 is that:

[0080] The second distance adjustment mechanism 24 includes a connecting rope body 242 fixedly arranged on the first cantilever 21 and the second cantilever 23 and a retracting assembly 243 for retracting and retracting the connecting rope body 242. In the embodiment of the present application, the retracting assembly 243 includes a mounting frame 2431, a fixed pulley 2432, a winch 2433 and a movable pulley 2434. The mounting frame 2431 is hooked on the first cantilever 21 by a hook, the fixed pulley 2432 is rotatably connected to the mounting frame 2431, and the winch 2433 is mounted on the mounting frame 24 31, and the fixed pulley 2432 is coaxially fixedly connected to the output shaft of the winch 2433, the movable pulley 2434 is rotatably connected to the end of the second cantilever 23, the connecting rope body 242 is set to be a steel wire rope, one end of the steel wire rope is fixed on the fixed pulley 2432, and the other end of the steel wire rope is passed around the fixed pulley 2432 and the movable pulley 2434 and fixed on the bottom side of the mounting frame 2431, and the rotation axis of the winch 2433, the fixed pulley 2432 and the movable pulley 2434 is parallel to the rotation axis of the first cantilever 21.

[0081] The implementation principle of Example 3 is:

[0082] For long-rod-type special-shaped parts with special-shaped cross-sections, a traditional scoop-type sling and the embodiment of the present application can be used in combination, and a winch 2433 can be used to realize the winding and unwinding operations of the fixed pulley 2432 on the wire rope. Since the wire rope is wound on the movable pulley 2434, the movable pulley 2434 is raised and lowered as the wire rope is wound and unwound, thereby realizing the rotation of the second cantilever 23 in the direction of approaching or moving away from the first cantilever 21, realizing the distance adjustment operation between the first cantilever 21 and the second cantilever 23, and then, relative to the traditional scoop-type sling, the overall tilt angle of the long-rod-type special-shaped parts can be adjusted.

[0083] The embodiment of the present application also discloses a sling assembly.

[0084] Example 1

[0085] Reference Figure 6 and Figure 7 The sling assembly includes a lifting beam 6, which is adjustable along its length and is provided with multiple lower chord self-tensioning lifting adjustment units in the application embodiment 1, wherein, in the embodiment of the present application, multiple second rotating seats 222 are provided along the length direction of the lifting beam 6, and the second rotating seat 222 and the end of the piston rod of the linear cylinder 223 are detachably connected through a pin shaft.

[0086] Reference Figure 6 and Figure 7 Specifically, the adjustable method is as follows: the hoisting crossbeam 6 is provided with a plurality of latch holes 61 along its length. The mounting longitudinal beam is sleeved onto the hoisting crossbeam 6, and the mounting longitudinal beam is provided with a latch pin 11 that engages with the latch holes 61, thereby achieving a detachable fixed connection between the mounting longitudinal beam and the hoisting crossbeam 6. When the position of the connecting longitudinal beam 1 needs to be adjusted, the detachable fixed connection between the linear cylinder 223 and the corresponding second rotating seat 222 can be adjusted simultaneously.

[0087] Reference Figure 6 and Figure 8 Two lower chord self-tensioning hoisting adjustment units are installed at intervals on the hoisting crossbeam 6, which can perform stable horizontal hoisting operations on special-shaped parts. It can achieve self-tensioning clamp fixation, quick material removal and precise position adjustment operations on different cross-sections of long-rod special-shaped parts.

[0088] Example 2

[0089] Reference Figure 5 and Figure 9 , the difference between the embodiment of the present application and embodiment 2 is that,

[0090] Two lower chord self-tensioning hoisting adjustment units according to Example 3 of the application are arranged at intervals on the hoisting beam 6.

[0091] The steel wire rope in one of the lower chord self-tensioning hoisting adjustment units is driven by the winch 2433 to be in a reeling state, and the steel wire rope in the other lower chord self-tensioning hoisting adjustment unit is driven by the winch 2433 to be in an unreeling state, so that the second cantilevers 23 in the two lower chord self-tensioning hoisting adjustment units have different rotation angles, so that the special-shaped parts scooped by the bottom scooping rigging 4 are in an inclined state, thereby meeting the lifting and installation requirements of the special-shaped parts in an inclined position.

[0092] The embodiment of the present application also discloses a sling system.

[0093] Reference Figure 10 The sling system includes at least two sling components in Example 2 of the application, that is, a total of four lower chord self-tensioning hoisting adjustment units. The embodiment of the present application also includes a hoisting main beam 7. The upper hoisting rigging 3 in the four lower chord self-tensioning hoisting adjustment units is vertically fixed on the hoisting main beam 7, and the two ends of the hoisting main beam 7 can be fixed with extended beam sections by welding according to the operating conditions; the hoisting main beam 7 is provided with a main rigging 8 for hooking the hook of a crane or a hoist.

[0094] The implementation principle of a sling system in the embodiment of the present application is as follows:

[0095] For the solution of oblique lifting of the twin-head tower or oblique lifting of the double blades, the main lifting beam 7 is fixed by using the main rigging 8, and then the implementation method in Example 3 can be used within the plane where the main lifting beam 7 is located to make the special-shaped parts lifted by the two lower chord self-tensioning lifting adjustment units in each lower chord self-tensioning sling that can adapt to special-shaped cross-sections be installed obliquely, and the adjustment method in Example 1 can be used to realize quick adjustment of the pitch angle of the twin-head tower and the double blades.

[0096] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A lower chord self-tensioning hoisting adjustment unit, characterized by: It comprises a connecting longitudinal beam (1) and an adjusting cantilever assembly (2) rotatably arranged on both sides of the connecting longitudinal beam (1) in a longitudinal direction, wherein an end of each adjusting cantilever assembly (2) away from its rotating connection is provided with an upper hoisting rigging (3), and each adjusting cantilever assembly (2) is provided with a hoisting portion (211), and a bottom sling (4) for slinging special-shaped parts is provided between the hoisting portions (211) of the adjusting cantilever assembly (2); It also includes a top abutting assembly (5) that is adjustable in height and is arranged at the bottom of the connecting longitudinal beam (1) for abutting the top of the special-shaped member; The hoisting parts (211) are provided in plurality along the length direction of the adjustable cantilever assembly (2); The top abutting assembly (5) comprises a transverse swing frame (52) that is adjustable in height and is arranged at the bottom of the connecting longitudinal beam (1), and a pressing block (53) that is arranged on the transverse swing frame (52) and is used to abut the top of the special-shaped part, and a rotational connection is formed between the transverse swing frame (52) and the connecting longitudinal beam (1); The adjustable cantilever assembly (2) comprises a first cantilever (21) and a second cantilever (23) whose ends are rotatably connected to the connecting longitudinal beam (1); the upper hoisting rigging (3) is arranged at the other end of the first cantilever (21); a second distance adjustment mechanism (24) for adjusting the distance between the first cantilever (21) and the second cantilever (23) is arranged between the first cantilever (21) and the second cantilever (23); the hoisting portion (211) is arranged on the second cantilever (23); and the rotation axes of the first cantilever (21) and the second cantilever (23) are parallel to the length direction of the hoisting beam (6); The second distance adjustment mechanism (24) comprises a connecting rod assembly, one end of the connecting rod assembly is rotatably connected to the first cantilever (21), the other end of the connecting rod assembly is rotatably connected to the second cantilever (23), and the rotation axis of the connecting rod assembly is parallel to the rotation axis of the first cantilever (21).

2. The lower chord self-tensioning hoisting adjustment unit according to claim 1, characterized in that: The connecting rod assembly forms a detachable fixed connection with the rotational connection between the first cantilever (21) and the second cantilever (23).

3. The lower chord self-tensioning hoisting adjustment unit according to claim 2, characterized in that: A plurality of detachable fixed connection points between the first cantilever (21) and the second cantilever (23) and the connecting rod assembly are provided along their respective length directions.

4. The lower chord self-tensioning hoisting adjustment unit according to claim 3, characterized in that: The second distance adjustment mechanism (24) comprises a connecting rope body (242) fixedly arranged on the first cantilever (21) and the second cantilever (23), and a retracting assembly (243) for retracting and extending the connecting rope body (242).

5. The lower chord self-tensioning hoisting adjustment unit according to claim 4, characterized in that: The retractable assembly (243) includes a mounting frame (2431), a fixed pulley (2432), a winch (2433) and a movable pulley (2434). The mounting frame (2431) is detachably fixed to the first cantilever (21). The fixed pulley (2432) is rotatably connected to the mounting frame (2431). The winch (2433) is fixed to the mounting frame (2431) and is coaxially fixedly connected to the fixed pulley (2432). The movable pulley (2434) 2434) is rotatably connected to the second cantilever (23), one end of the connecting rope (242) is fixedly wound around the hoist (2433), and the other end of the connecting rope (242) is wound around the fixed pulley (2432) and the movable pulley (2434) in sequence and fixed to the mounting frame (2431), and the rotation axes of the hoist (2433), the fixed pulley (2432) and the movable pulley (2434) are parallel to the rotation axis of the first cantilever (21).

6. A sling assembly comprising the lower chord self-tensioning hoisting adjustment unit according to claim 5, characterized in that: It also includes a hoisting crossbeam (6), and a plurality of the connecting longitudinal beams (1) are adjustable and arranged along the length direction of the hoisting crossbeam (6).

7. A spreader system comprising at least two spreader assemblies according to claim 6, characterized in that: It also includes a hoisting main crossbeam (7), one end of the upper hoisting rigging (3) away from the first cantilever (21) is fixedly arranged on the hoisting main crossbeam (7), and a main rigging (8) for hooking a hook of a crane is arranged on the hoisting main crossbeam (7).

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