Hanging bracket suitable for special-shaped steel framework and using method

Abstract

The invention discloses a hanging bracket suitable for a special-shaped steel framework and a using method, and belongs to the technical field of hoisting equipment. The hanging bracket comprises an integral frame, a plurality of hanging beams, sliding type hanging lugs and hanging beam supporting feet; the integral frame comprises two longitudinal beams and two cross beams, and the longitudinal beams and the cross beams are connected with each other to form a rectangular frame; the hanging beam comprises a fixed hanging beam and a movable hanging beam, the fixed hanging beam is fixedly connected with the longitudinal beam, and the movable hanging beam is connected with the longitudinal beam through a locking mechanism; the lifting lug is arranged above the integral frame and is used for being connected with a lifting hook of hoisting equipment; the sliding type lifting lug is arranged on the lifting beam and used for being connected with the special-shaped steel framework, and the sliding type lifting lug is connected with the lifting beam through a locking mechanism; the lifting frame can adapt to various special-shaped frameworks with different specifications and different lifting point distribution through reconfiguration, a lifting appliance does not need to be specially designed and manufactured for each framework, and generalization is achieved.

Description

Technical Field

[0001] This invention belongs to the field of lifting equipment technology, specifically relating to a lifting frame suitable for irregularly shaped steel frames and its usage method. Background Technology

[0002] In modern construction and bridge engineering, modular construction of irregularly shaped steel frames has become a key technological trend in order to achieve complex shapes and pursue construction efficiency and quality. These frames typically refer to steel components prefabricated in factories, with non-standard cross-sections, three-dimensional curved surfaces, or asymmetrical structures. Their shapes vary greatly, and their weight and center of gravity distribution differ significantly. As the core link connecting the prefabrication plant and on-site installation, the safety and precision of hoisting directly determine the success or failure of the overall construction.

[0003] Due to their complex geometry, irregularly shaped frames often have asymmetrical and non-uniformly distributed pre-set lifting points, which often presents operators with a dilemma: either force the use of mismatched lifting points, causing interference between the wire rope and the component or generating huge eccentric loads; or abandon the use of standard hangers and seek primitive methods such as welding temporary lifting lugs, which not only damages the component coating and base material, but also introduces huge quality and safety risks.

[0004] The center of gravity of irregularly shaped frames often deviates from their geometric center. An ideal lifting system must be able to precisely align the hook's plumb line through the component's center of gravity by finely adjusting the lifting point, thus ensuring a smooth lift off the ground. Traditional fixed scaffolding systems completely lack this "center-finding" capability. In practice, workers can only experiment through repeated, inefficient, and dangerous "trial lift-landing-adjustment of rigging" processes. This entire process is time-consuming, and each trial lift may cause irreversible internal damage or deformation to the component due to improper stress.

[0005] It is evident that traditional hangers are not highly adaptable to the hoisting of irregularly shaped steel frames, and cannot adjust the lifting points according to the center of gravity of the irregularly shaped steel frame. Summary of the Invention

[0006] To address the aforementioned problems in the prior art, this invention provides a hanger and its usage method suitable for irregularly shaped steel frames, solving the problem that traditional hangers are not highly adaptable to the hoisting of irregularly shaped steel frames and cannot adjust the lifting points according to the center of gravity of the irregularly shaped steel frame.

[0007] The objective of this invention can be achieved through the following technical solutions: A hanger suitable for irregularly shaped steel frames includes an integral frame, multiple lifting beams, sliding lifting lugs, and lifting beam supports. The integral frame includes two longitudinal beams and two transverse beams, which are connected to form a rectangular frame. The lifting beams include fixed lifting beams and movable lifting beams. The fixed lifting beams are fixedly connected to the longitudinal beams, and the movable lifting beams are movably connected to the longitudinal beams via a locking mechanism to achieve position adjustment. The lifting lugs are disposed above the integral frame and are used to connect to the hooks of lifting equipment. The sliding lifting lugs are disposed on the lifting beams and are used to connect to the irregularly shaped steel frame. The sliding lifting lugs are movably connected to the lifting beams via a locking mechanism to achieve position adjustment. The lifting beam supports are disposed on the movable lifting beams and contact the longitudinal beams to enhance anti-overturning properties.

[0008] Preferably, there are four hanging beams, all of which are vertically connected between two longitudinal beams and located above the two longitudinal beams; the four hanging beams are arranged in the following order: No. 1 hanging beam, No. 2 hanging beam, No. 2 hanging beam, and No. 1 hanging beam, where No. 1 hanging beam is a movable hanging beam and is distributed on the outside of the hanging frame, and No. 2 hanging beam is a fixed hanging beam and is distributed on the inside of the hanging frame.

[0009] Preferably, there are 12 sliding lifting lugs, eight of which are installed on the movable lifting beam and four on the fixed lifting beam.

[0010] Preferably, the locking mechanism of the movable lifting beam is a finely rolled threaded steel bar that passes through the opening in the web plate, and the position is fixed by locking; the locking mechanism of the sliding lifting lug is a finely rolled threaded steel bar that passes through the opening in the limiting frame plate, and the position is fixed by locking.

[0011] Preferably, it also includes a horizontal lifting beam and a vertical lifting beam; the horizontal lifting beam is fixedly connected between two vertical beams; the vertical lifting beam is fixedly connected below two fixed lifting beams on the inner side; there are four lifting lugs for connecting the lifting equipment hook, which are symmetrically arranged above the horizontal lifting beam and the vertical lifting beam.

[0012] Preferably, the lifting lug is connected to a first shackle, which is used to connect the first wire rope of the lifting equipment; the sliding lifting lug is connected to a second shackle, which is used to connect the irregular steel frame; and a U-shaped turnbuckle is connected to the second wire rope connecting the irregular steel frame for pre-loosening or pre-tightening the wire rope.

[0013] A method for using a hanger suitable for irregularly shaped steel frames includes the following steps: S1. Use lifting equipment to lift the hanger above the irregular steel frame; S2. Adjust the position of the movable lifting beam according to the size and shape of the irregular steel frame; S3. Adjust the position of the sliding lifting lugs according to the distribution of lifting points on the irregular steel frame; S4. Connect the sliding lifting lug to the lifting point on the irregular steel frame; S5. Conduct a trial lift. Once the trial lift meets the requirements, proceed with the formal lifting.

[0014] Preferably, adjusting the position of the sliding lug in step S3 specifically includes the following sub-steps: S31. Based on the lifting point layout diagram of the irregular steel frame, determine the target position of each sliding lifting lug on the corresponding lifting beam; S32. Loosen the lock nut of the fine-rolled threaded steel bar that is inserted into the opening of the sliding lug limit frame plate; S33. Slide the sliding lug along the length of the lifting beam to the target position and align it with the lifting point on the irregular steel frame; S34. Tighten the lock nut to securely fix the sliding lifting lug to the lifting beam. Preferably, in step S4, a steel wire rope with a U-shaped turnbuckle is used for connection; after connection, the steel wire rope at each lifting point is pre-tightened by adjusting the U-shaped turnbuckle so that the force at each lifting point tends to be uniform.

[0015] Preferably, in step S5, the trial lifting includes the following sub-steps: S51. Lift the irregularly shaped steel frame 100-200mm off the ground and hover for 1-2 minutes; S52. Use tilt sensors and force sensors to monitor the tilt status of the hanger and frame and the force on each suspension point in real time; S53. Based on the monitoring data, the length of the wire rope is finely adjusted by adjusting the U-shaped turnbuckle to control the force deviation of each suspension point within ±5%. S54. After confirming stability, proceed with the formal hoisting.

[0016] The beneficial effects of this invention are as follows: This application demonstrates that a single gantry system can be reconfigured to adapt to various irregularly shaped frames with different specifications and lifting point distributions, eliminating the need for specially designed and manufactured lifting tools for each frame, thus achieving universality. Simultaneously, precise alignment ensures that the lifting force is transmitted along the designed path, effectively preventing frame deformation or damage caused by improper stress. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of the hanger provided in one embodiment of the present invention; Figure 2 This is a schematic diagram of the first structure for lifting the hanger provided in one embodiment of the present invention; Figure 3 This is a schematic diagram of the second structure for lifting with a hanger provided in one embodiment of the present invention; Figure 4 This is a schematic diagram of the third structure for lifting with a hanger provided in one embodiment of the present invention; Figure 5 This is a schematic diagram of the lifting lug structure provided in one embodiment of the present invention; Figure 6 This is a schematic diagram of a sliding lug structure provided in one embodiment of the present invention; Figure 7 This is a schematic diagram of the suspension beam support structure provided in one embodiment of the present invention; Legend: 1. Horizontal beam; 2. Longitudinal beam; 3. Lifting horizontal beam; 4. Lifting longitudinal beam; 5. Lifting beam No. 1; 6. Lifting beam No. 2; 7. Sliding lifting lug; 8. Lifting beam support; 10. Precision rolled threaded steel bar; 12. Lifting lug; 13. First wire rope; 14. First shackle; 15. U-shaped turnbuckle; 16. Second wire rope; 17. Second shackle. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0020] In traditional hoisting of irregularly shaped steel frames, temporary lifting lugs are typically welded or fixed-spacing lifting devices are used. The former requires on-site welding on the frame, which is not only inefficient but also causes thermal damage to the base material, altering its properties. The latter, due to its fixed lifting point positions, cannot adapt to the complex and varied lifting point distribution of irregularly shaped frames, resulting in the lifting points not aligning with the frame's designed stress points. This can easily cause excessive local stress and irreversible deformation of the frame during hoisting, posing significant safety and quality hazards.

[0021] like Figures 1-7 As shown, a hanger suitable for irregularly shaped steel frames includes an integral frame, multiple lifting beams, sliding lifting lugs 7, and lifting beam supports 8. The integral frame includes two longitudinal beams 2 and two transverse beams 1, which are connected to each other to form a rectangular frame. The lifting beams include fixed lifting beams and movable lifting beams. The fixed lifting beams are fixedly connected to the longitudinal beams 2, and the movable lifting beams are movably connected to the longitudinal beams 2 through a locking mechanism to achieve position adjustment. The lifting lugs 12 are located above the integral frame and are used to connect the hooks of lifting equipment. The sliding lifting lugs 7 are located on the lifting beams and are used to connect the irregularly shaped steel frames. The sliding lifting lugs 7 are movably connected to the lifting beams through a locking mechanism to achieve position adjustment. The lifting beam supports 8 are located on the movable lifting beams and contact the longitudinal beams 2 to enhance anti-overturning properties.

[0022] The hanger employs a dual-position adjustable mechanism combining a movable lifting beam and sliding lifting lugs 7. First, by adjusting the position of the movable lifting beam on the longitudinal beam 2, the macroscopic layout of the main load-bearing structure of the hanger is adjusted, ensuring that the main load-bearing points of the hanger match the main load-bearing nodes on the frame. Second, by adjusting the individual position of the sliding lifting lugs 7 along the length of the lifting beam, precise microscopic positioning of each connection point is achieved, ensuring that all lifting points are precisely perpendicularly aligned with the preset lifting points on the frame.

[0023] This allows a single lifting frame to adapt to various irregularly shaped frames with different specifications and lifting point distributions through reconfiguration, eliminating the need for specially designed and manufactured lifting tools for each frame, thus achieving universality. Simultaneously, precise alignment ensures that the lifting force is transmitted along the designed path, effectively preventing frame deformation or damage due to improper stress. Furthermore, the lifting beam supports 8, located on the movable lifting beam, contact the longitudinal beam 2, providing necessary support for the adjusted cantilever structure, enhancing anti-overturning stability, and ensuring operational safety with the adjusted configuration.

[0024] In one embodiment, there are four suspension beams, all vertically connected between two longitudinal beams 2 and located above the two longitudinal beams 2. With the center of the suspension frame as the symmetrical point, suspension beams 1-5, 2-6, 2-6 and 1-5 are arranged symmetrically along the length direction. Among them, the two outer suspension beams 1-5 are movable suspension beams, which can be adjusted within a range of 1 to 3 meters from the end of the frame. The two inner suspension beams 2-6 are fixed suspension beams, which are welded to a position 1 meter away from the center of the frame on both sides, forming a symmetrical layout of "moving-fixed-fixed-moving". This provides flexibility to adapt to irregular steel frames of different lengths, while ensuring the stability of the core load-bearing area.

[0025] In one embodiment, there are 12 sliding lifting lugs 7 in total, eight of which are installed on the movable lifting beams and four on the fixed lifting beams. Each movable lifting beam (lifting beam 1, 5) has 4 sliding lifting lugs 7, for a total of 8 on the two movable lifting beams; each fixed lifting beam (lifting beam 2, 6) has 2 sliding lifting lugs 7, for a total of 4 on the two fixed lifting beams. Therefore, the entire hanger is equipped with a total of 12 sliding lifting lugs 7, which makes the outer movable area have a stronger ability to adapt to lifting points, while the inner fixed area provides basic support, together coping with the complex distribution of lifting points of the irregular frame.

[0026] In one embodiment, the locking mechanism of the movable lifting beam is a finely rolled threaded steel bar 10 passing through the opening in the web plate, which is locked to fix its position; the locking mechanism of the sliding lifting lug 7 is a finely rolled threaded steel bar 10 passing through the opening in the limiting frame plate, which is locked to fix its position; when adjustment is required, simply loosen the nuts at both ends of the finely rolled threaded steel bar 10 to easily move the lifting beam or lifting lug 12, realizing the rapid adjustment of the size of the hanger and the position of the lifting point, and the versatility of the hanger. After the position of the lifting point is determined, tightening the nuts will move the lifting beam and the web plate, as well as the sliding lifting lug 7 and the limiting frame plate through the preload to generate static friction, and combine it with the shear resistance of the finely rolled threaded steel bar 10 to form a temporary rigid connection node.

[0027] In one embodiment, the system also includes a horizontal beam 3 and a vertical beam 4. The horizontal beam 3 is fixedly connected between two vertical beams 2. The vertical beam 4 is fixedly connected below two fixed lifting beams on the inner side. There are four lifting lugs 12 for connecting the hook of the lifting equipment, which are symmetrically arranged above the horizontal beam 3 and the vertical beam 4. Thus, the horizontal beam 3, the vertical beam 4, and the main frame together form a rigid system. The four lifting lugs 12 for connecting the hook of the lifting equipment are symmetrically installed on the upper surface of the horizontal beam 3 and the vertical beam 4. Specifically, two lifting lugs 12 are located at both ends of the horizontal beam 3, and the other two lifting lugs 12 are located at both ends of the vertical beam 4. The center points of the four lifting lugs 12 are centrally symmetrically distributed, ensuring that the load can be evenly transferred to the entire main body of the lifting frame through this special support structure during lifting operations. This greatly improves the stability and balance of the lifting process and effectively prevents the risk of overturning caused by eccentric loading.

[0028] In one embodiment, the lifting lugs 12, located above the horizontal beam 3 and the vertical beam 4, are connected to the end of the first wire rope 13 from the lifting equipment via a first shackle 14. The upper end of the first wire rope 13 is directly connected to the hook of the lifting equipment, forming the main lifting system of the gantry. Its core function is to smoothly transmit the lifting force of the lifting equipment to the overall frame of the gantry. Meanwhile, the sliding lifting lugs 7, located on the lifting beam, are connected to one end of the second wire rope 16 via a second shackle 17. The other end of the second wire rope 16 is used to connect to the irregular steel frame to be lifted. The key point is that a U-shaped turnbuckle 15 is connected to the second wire rope 16. In specific operation, by rotating the adjusting nut of the turnbuckle, the effective length of the second wire rope 16 can be changed, thereby achieving fine adjustment of the lifting points of the steel frame to which it is connected.

[0029] Before hoisting, if the multiple lifting points of the irregular steel frame are at different heights, the operator can adjust the U-shaped turnbuckles 15 corresponding to each lifting point to ensure that all the second wire ropes 16 are in a uniformly tight state before being subjected to force. When the lifting equipment begins to bear force and conducts a trial lift, the weight of the frame will be evenly distributed to all the second wire ropes 16, thereby ensuring that the steel frame is smoothly lifted off the support and effectively avoiding the risks of frame deformation, instantaneous impact and tightening of wire ropes, or single-rod overload caused by uneven force on each lifting point.

[0030] A method for using a hanger suitable for irregularly shaped steel frames includes the following steps: S1. Operate the crane, connect the main hook to the four lifting lugs 12 on the gantry, and smoothly lift the unloaded gantry, and move it to hover directly above the laid irregular steel frame. S2. Based on the actual length of the irregular steel frame (e.g., 18 meters), instruct the crane operator to fine-tune the position of the hanger, then loosen the locking mechanism of the moving beam, slide it to a position 2.5 meters away from the end of the hanger, and then relock it so that the spacing of the four hanger beams matches the main stress points of the frame. S3. According to the 12 lifting point positions marked on the skeleton drawing, loosen the locking nuts of each sliding lifting lug 7, slide them one by one to the position that corresponds perpendicularly to the lifting point of the skeleton below, and then lock them in place. The combination of lifting beam positioning and lifting point positioning forms a two-level adjustment system. The secondary fine adjustment of the sliding lifting lug 7 on the already positioned lifting beam solves the problem that the lifting point positions of irregular skeletons may be irregular and asymmetrical. By adjusting each lifting lug 12 to correspond perpendicularly to the lifting point marked on the drawing, it is ensured that all lifting ropes are in an ideal state, minimizing the generation of lateral force or horizontal component force.

[0031] S4. Using U-shaped turnbuckles 15, the steel wire rope is connected to the sliding lifting lug 7 at the upper end and to the lifting point of the irregular steel frame at the lower end. After the lifting point is accurately positioned, slight differences in the length of the connecting parts may still cause uneven force on each lifting point. By using U-shaped turnbuckles 15, the length of each steel wire rope is finely adjusted before hoisting, thereby ensuring that the irregular steel frame can be lifted off the ground smoothly and synchronously, and all lifting points can evenly share the load. S5. Conduct a trial lift: Slowly lift the frame until it is about 150mm off the ground, then hover and observe. After confirming there are no abnormalities, proceed with the formal lifting to the installation position. This not only checks the reliability of the rigging connections but also serves as a comprehensive dynamic verification of the entire preliminary adjustment work (including the position of the lifting beam, the positioning of the lifting lugs 12, and the rope length). Minor abnormalities such as frame tilting, local deformation, and rigging slack are promptly identified and corrected in the early stages of lifting.

[0032] In one embodiment, adjusting the position of the sliding lug 7 in step S3 specifically includes the following sub-steps: S31. According to the lifting point layout diagram of the irregular steel frame, determine the target position of each sliding lifting lug 7 on the corresponding lifting beam. Loosen the locking nuts at both ends of the precision-rolled threaded steel bar 10 that are inserted into the opening of the limiting frame plate of the sliding lifting lug 7, and slide the sliding lifting lug 7 directly along the length of the lifting beam so that its center line or specific mark is accurately aligned with the target scale line pre-marked on the lifting beam, thereby completing the vertical alignment with the corresponding lifting point of the lower frame. Finally, after confirming that the position is correct, tighten the locking nuts on the precision-rolled threaded steel bar 10 with a wrench. Relying on the huge friction force generated between the nut and the limiting frame plate, the sliding lifting lug 7 is firmly fixed in the predetermined position of the lifting beam, preparing for subsequent load-bearing. S32. Loosen the locking nut of the fine-rolled threaded steel bar 10 that is inserted into the opening of the limit frame plate of the sliding lug 7. Compared with ordinary bolts or simple clamps, the fine-rolled threaded steel bar 10 has high-strength threads throughout the entire rod, allowing the locking nut to be tightened at any position, thereby realizing the stepless adjustment and full-stroke locking of the lug 12 in the length direction of the lifting beam. S33. Slide the sliding lug 7 along the length of the lifting beam to the target position and align it with the lifting points on the irregular steel frame. The sliding adjustment method overcomes the limitations of traditional lifting tools where the spacing between lifting points is fixed or there are only a few discrete adjustment positions. It can adapt to any non-standard, asymmetrical and complex distribution of lifting points that may occur on irregular frames. It avoids harmful situations such as lateral misalignment of lifting points leading to oblique tension of wire ropes and torsion of the frame. It is the core action to ensure the safety and quality of lifting.

[0033] S34. Tighten the locking nut to securely fix the sliding lifting lug 7 to the lifting beam. The huge static friction generated between the nut and the limiting frame plate, as well as the mechanical interlocking effect of the threaded steel bar 10, constitute a highly reliable anti-slip mechanism. This fixing method is not only firm, but also has good repeatability and is easy to disassemble.

[0034] In one embodiment, in step S4, steel wire ropes with U-shaped turnbuckles 15 are used for connection. After connection, the steel wire ropes at each lifting point are pre-tightened by adjusting the U-shaped turnbuckles 15 to make the force on each lifting point more uniform. The operator uses tools such as wrenches to rotate the U-shaped turnbuckles 15 connected to the steel wire rope one by one. By tightening the turnbuckles, the distance between the threaded sleeves at both ends is effectively shortened, thereby slightly shortening the overall effective length of the steel wire rope and applying an initial, controllable tension to all lifting points. This pre-tightening operation is carried out before the frame is fully lifted and is still partially supported by the ground. Its purpose is to actively ensure that the multiple steel wire ropes connecting each lifting point are under tension and uniform force as much as possible before the formal lifting. The pre-tightened steel wire rope system eliminates the initial slack and avoids the impact and sway that may occur when the frame is lifted off the ground due to the sudden tension of the ropes.

[0035] In one embodiment, step S5 includes the following sub-steps: S51. Lift the irregularly shaped steel frame 100-200mm off the ground and suspend it for 1-2 minutes to completely detach the frame from the support, realistically simulating the load-bearing state. Due to its low center of gravity and low potential energy, it can be quickly and safely lowered if any abnormality is detected, greatly reducing trial-and-error costs. The 1-2 minute suspension introduces time, providing operators with ample observation time and allowing potential problems such as residual stress within the structure and creep characteristics of the rigging to become apparent. This transforms a transient action into a continuous and stable testing process. S52. Use tilt sensors and force sensors to monitor the tilt state of the hanger and frame and the force on each suspension point in real time. By introducing tilt sensors and force sensors, physical quantities that reflect the system's balance state and force distribution can be directly obtained. This allows for the real-time and accurate capture of minor tilt of the hanger, abnormal posture of the frame, and, most importantly, uneven force on each suspension point. S53. Based on the monitoring data, the length of the wire rope is finely adjusted by adjusting the U-shaped turnbuckle 15 to control the force deviation of each lifting point within ±5%. By finely adjusting the length of the wire rope, the load distribution of the entire lifting system is dynamically and online recalibrated in the air to ensure that the complex flexible body of the irregular frame can be lifted in the optimal internal force state, avoiding local overload or structural deformation. S54. After confirming stability, proceed with the formal hoisting.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A hanger suitable for irregularly shaped steel frames, characterized in that, The system includes an overall frame, multiple lifting beams, sliding lifting lugs, and lifting beam supports. The overall frame comprises two longitudinal beams and two transverse beams, which are interconnected to form a rectangular frame. The lifting beams include fixed lifting beams and movable lifting beams. The fixed lifting beams are fixedly connected to the longitudinal beams, and the movable lifting beams are connected to the longitudinal beams via a locking mechanism to achieve position adjustment. The lifting lugs are located above the overall frame and are used to connect to the hooks of lifting equipment. The sliding lifting lugs are located on the lifting beams and are used to connect to irregularly shaped steel frames. The sliding lifting lugs are connected to the lifting beams via a locking mechanism to achieve position adjustment. The lifting beam supports are located on the movable lifting beams and contact the longitudinal beams to enhance anti-overturning properties.

2. The hanger suitable for irregularly shaped steel frames according to claim 1, characterized in that, There are four lifting beams, all of which are vertically connected between two longitudinal beams and located above the two longitudinal beams. The four lifting beams are arranged in the following order: No. 1 lifting beam, No. 2 lifting beam, No. 2 lifting beam, and No. 1 lifting beam. Among them, No. 1 lifting beam is a movable lifting beam and is distributed on the outside of the hanging frame, while No. 2 lifting beam is a fixed lifting beam and is distributed on the inside of the hanging frame.

3. A hanger suitable for irregularly shaped steel frames according to claim 2, characterized in that, There are a total of 12 sliding lifting lugs, eight of which are installed on the movable lifting beam and four are installed on the fixed lifting beam.

4. A hanger suitable for irregularly shaped steel frames according to claim 3, characterized in that, The locking mechanism of the movable lifting beam is a finely rolled threaded steel bar that passes through the opening in the web plate, and its position is fixed by locking; the locking mechanism of the sliding lifting lug is a finely rolled threaded steel bar that passes through the opening in the limiting frame plate, and its position is fixed by locking.

5. A hanger suitable for irregularly shaped steel frames according to claim 4, characterized in that, It also includes a horizontal lifting beam and a vertical lifting beam; the horizontal lifting beam is fixedly connected between two vertical beams; the vertical lifting beam is fixedly connected below two fixed lifting beams on the inner side; there are four lifting lugs for connecting the hook of the lifting equipment, which are symmetrically arranged above the horizontal lifting beam and the vertical lifting beam.

6. A hanger suitable for irregularly shaped steel frames according to claim 5, characterized in that, The lifting lug is connected to a first shackle, which is used to connect the first wire rope of the lifting equipment; the sliding lifting lug is connected to a second shackle, which is used to connect the irregular steel frame; a U-shaped turnbuckle is connected to the second wire rope connecting the irregular steel frame for pre-loosening or pre-tightening the wire rope.

7. A method for using a hanger suitable for irregularly shaped steel frames, applicable to the hanger for irregularly shaped steel frames as described in claim 6, characterized in that, Includes the following steps: S1. Use lifting equipment to lift the hanger above the irregular steel frame; S2. Adjust the position of the movable lifting beam according to the size and shape of the irregular steel frame; S3. Adjust the position of the sliding lifting lugs according to the distribution of lifting points on the irregular steel frame; S4. Connect the sliding lifting lug to the lifting point on the irregular steel frame; S5. Conduct a trial lift. Once the trial lift meets the requirements, proceed with the formal lifting.

8. The method of using a hanger suitable for irregularly shaped steel frames according to claim 7, characterized in that, Step S3, which involves adjusting the position of the sliding lug, specifically includes the following sub-steps: S31. Based on the lifting point layout diagram of the irregular steel frame, determine the target position of each sliding lifting lug on the corresponding lifting beam; S32. Loosen the lock nut of the fine-rolled threaded steel bar that is inserted into the opening of the sliding lug limit frame plate; S33. Slide the sliding lug along the length of the lifting beam to the target position and align it with the lifting point on the irregular steel frame; S34. Tighten the locking nut to securely fix the sliding lug to the lifting beam.

9. A method for using a hanger suitable for irregularly shaped steel frames according to claim 7, characterized in that, In step S4, steel wire ropes with U-shaped turnbuckles are used for connection; after connection, the steel wire ropes at each lifting point are pre-tightened by adjusting the U-shaped turnbuckles so that the force at each lifting point tends to be uniform.

10. A method for using a hanger suitable for irregularly shaped steel frames according to claim 7, characterized in that, In step S5, the trial lifting includes the following sub-steps: S51. Lift the irregularly shaped steel frame 100-200mm off the ground and hover for 1-2 minutes; S52. Use tilt sensors and force sensors to monitor the tilt status of the hanger and frame and the force on each suspension point in real time; S53. Based on the monitoring data, the length of the wire rope is finely adjusted by adjusting the U-shaped turnbuckle to control the force deviation of each suspension point within ±5%. S54. After confirming stability, proceed with the formal hoisting.

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